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矿井排水系统设计技术统一口径
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<p style="text-align:center;" class="MsoNormal" align="center"> <b><span style="line-height:150%;font-family:宋体;font-size:22pt;font-weight:bold;"><span>矿井排水系统设计技术统一口径</span></span></b><b><span style="line-height:150%;font-family:宋体;font-size:22pt;font-weight:bold;"></span></b> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>一、</span></span><b><span style="line-height:150%;font-family:宋体;font-size:12pt;font-weight:bold;"><span>设计原则和依据</span></span></b><b><span style="line-height:150%;font-family:宋体;font-size:12pt;font-weight:bold;"></span></b> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> 1<span>、遵循《煤矿安全规程》、《煤矿井下排水泵站及排水管路设计规范》、《煤炭工业矿井设计规范》和《煤炭工业小型矿井设计规范》以及其它有关规定;</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> 2<span>、选用取得《煤矿矿用产品安全标志证书》的高效节能产品,安全可靠,技术先进,经济合理;</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> 3<span>、采矿专业提供的矿井最大涌水量</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">m</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>和正常涌水量</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">z</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>、矿井水</span>PH<span>值、敷设排水管路井筒的井口和井底标高</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">H</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>、</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">H</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">2</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>以及井筒坡度、矿井瓦斯等级。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>二、</span></span><b><span style="line-height:150%;font-family:宋体;font-size:12pt;font-weight:bold;"><span>排水泵站的能力确定</span></span></b><b><span style="line-height:150%;font-family:宋体;font-size:12pt;font-weight:bold;"></span></b> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> 1<span>、最小排水能力计算</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> <span>(</span>1<span>)、正常涌水量时工作水泵最小排水能力:</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"> =24</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">z</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">/20=1</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">2</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">z</span></sub><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"></span></sub> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> <span>(</span>2<span>)、最大涌水量时工作水泵最小排水能力:</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">2</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> </span><span style="line-height:150%;font-family:宋体;font-size:12pt;">=24</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">m</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">/20=1</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">2</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">m</span></sub><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"></span></sub> </p> <p style="text-indent:21.75pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">2</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>、水泵扬程估算</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:21.75pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> </span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">H</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"> =</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">K(H</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">+H</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">)</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>式中,</span> </span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">H</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p</span></sub><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"> </span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>为排水高度</span>,</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> </span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>且</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">H</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">=</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> H</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">-</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> H</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">2</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">,</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:40.2pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">H</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"> <span>为吸水高度</span>, <span>估算一般取</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">H</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">=</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">5</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">m,</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p style="text-indent:48pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">K</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"> <span>为管路损失系数</span>,<span>与井筒坡度有关</span><span>:</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:47.25pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>立井</span>: </span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">K</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">=1.1~1.15,</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:47.25pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>斜井</span>:<span>当α</span><span><20</span></span><sup><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:super;"><span>。</span>.</span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>时</span>, </span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">K</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">=1.3~1.35,</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:47.25pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> α<span>=20</span></span><sup><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:super;">.</span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;">~30</span><sup><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:super;"><span>。</span></span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>时</span>, </span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> K</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">=1.3~1.25,</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:47.25pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> α<span>>30</span></span><sup><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:super;"><span>。</span></span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>时</span>, </span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> K</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">=1.25~1.2.</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> 3<span>、 确定水泵台数</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:24pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>根据计算的</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>、</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">2</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>、</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">H</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">,<span>查水泵样本选择水泵</span><span>,</span><span>并根据拟选水泵的主要技术参数,初步预计水泵的流量</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">b</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(一般为额定流量),按《煤矿安全规程》第</span>278<span>条相关规定,分别计算出水泵站內工作水泵、备用水泵、检修水泵台数。水泵站內水泵总台数</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">N</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>按下面两种情况计算</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"><span>。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:24pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">(1)</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>、正常涌水量时:</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">N</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">=</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> n</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">+</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> n</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">2</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">+</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> n</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">3</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>式中</span></span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>,</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>工作水泵台数</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">n</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">= Q</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">/Q</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">b</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">,</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"> <span>且</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">n</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">≥<span>1</span><span>,当</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">n</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>不为整数时</span></span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>,</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>其小数应进位到整数。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:24pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>备用水泵台数</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">n</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">2</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">=0</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">7</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> n</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>,且</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">n</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">2</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">≥<span>1</span><span>,当</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">n</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">2</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>不为整数时,其小数应进位到整数。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:24pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>检修水泵台数</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">n</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">3</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">=0</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">25</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> n</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>,且</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">n</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">3</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">≥<span>1</span><span>,当</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">n</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">3</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>不为整数时</span></span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>,</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>其小数应进位到整数。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:24pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">(</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">2</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">)</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>、最大涌水量时,水泵工作台数</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">n</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">4</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">=</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> Q</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">2</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">/Q</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">b</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>,</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:24pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>当</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">n</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">4</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">≤</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> n</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">+</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> n</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">2</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>时,则</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">N</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">=</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> n</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">+</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> n</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">2</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">+</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> n</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">3</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>,</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:24pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>当</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">n</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">4</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">≥</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> n</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">+</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> n</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">2</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>时,则</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">N</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">=</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> n</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">4</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">+</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> n</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">3</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> <span>(</span>3<span>)、水文地质条件复杂、有突水危险的矿井,应根据情况增设水泵,或预留安装水泵位置。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>4<span>)、当矿井水</span><span>PH</span><span>≤</span><span>5</span><span>时,应选耐酸泵。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>三、</span></span><b><span style="line-height:150%;font-family:宋体;font-size:12pt;font-weight:bold;"><span>排水管路计算和管路布置</span></span></b><b><span style="line-height:150%;font-family:宋体;font-size:12pt;font-weight:bold;"></span></b> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> 1<span>、管路布置原则</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>1<span>)、根据《煤矿安全规程》第</span><span>278</span><span>条规定,井下排水管路应设工作管路和备用管路。工作管路应能在</span><span>20</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>内排出矿井</span>24</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>正常涌水量,工作管路和备用管路应能在</span>20</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>內排出矿井</span>24</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>最大涌水量。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>2<span>)、根据《煤矿井下排水泵站及排水管路设计规范》要求,每台水泵均能经两条管路排水,排水管路在泵站內宜作环形布置。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>3<span>)、管路和水泵的匹配,宜一管一泵;如果水泵需要并联工作,一趟管路宜并联</span><span>2</span><span>台水泵,即一管二泵,最多不宜超过一管三泵;有时为了控制管内水的流速,</span><span>1</span><span>台水泵也可并联二趟管路运行。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>4<span>)、水文地质条件复杂、有突水危险的矿井,视情况在井筒及管子道预留安装排水管位置。</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">2</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>、管径计算</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>1<span>)、选择排水干管管径时,应根据矿井涌水量大小和矿井规模及服务年限,进行技术经济比较,确定合理的流速和管径。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>2<span>)、管径计算</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:31.5pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">d</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">=</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q/900</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">π<span>V </span><span>)</span></span><sup><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:super;">1/2</span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;"> <span>(</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">m</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>)</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">,</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>式中</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">: </span><span style="line-height:150%;font-family:宋体;font-size:12pt;">Q<span>—流经管内流量(</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">m</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">3</span></sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">/h</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>)。一管一泵时</span>Q=</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">b</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>,一管二泵时</span>Q=2</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">b</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>,余类推</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:36pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;">V<span>—管內水流速度,一般排水管內</span><span>V=1</span></span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">5~2</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">2</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> m/s</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"> </span></sub><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">,</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>当</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">d</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">></span><span style="line-height:150%;font-family:宋体;font-size:12pt;">200</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> mm</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>时,可适当增大,但不宜超过</span>2</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">5</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> m/s</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"> <span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> 3<span>、管壁厚度计算,介绍两种方法:</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> <span>(</span>1<span>)、根据原煤炭工业部联合编写小组编写的《矿井提升、通风、排水、压风设备设计手册》中所推荐的公式计算:</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> </span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:24pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;">δ</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">=1/1+2p/[230(k</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">z</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">-0.65)–p] {[pd</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">/230(k</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">z</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">-0.65)</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">-P</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">]+c}</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"> <span>(</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">mm</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>)</span> (<span>公式一</span><span>)</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>式中</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">: d</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">—</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">d</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>排水管外径</span> <span>(</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">mm</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>)</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:24pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> </span><span style="line-height:150%;font-family:宋体;font-size:12pt;">p<span>—计算管段内部最大工作压力 (</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">kg/cm</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>)</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:24pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> </span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">k</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">z</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">—管材许用应力 </span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">(kg/mm</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">)</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>,且</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">k</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">z</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">=0</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">25<span>σ</span></span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">B</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p style="text-indent:24pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;">σ</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">B</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">—管材抗拉强度</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> (kg/mm</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">)</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>,当不知钢号时,无缝钢管取</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">k</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">z</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">=8~10</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> kg/mm</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>,焊接钢管取</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">k</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">z</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">=6</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> kg/mm</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:24pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">C</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">—附加厚度,一般取</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">C</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">=1</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> mm</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> <span>(</span>2<span>)、根据《煤矿井下排水泵站及排水管路设计规范》(送审稿)中推荐的公式计算: </span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> δ</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">=</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">δ</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">’</span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;">+</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">c</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"> </span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:36pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;">δ</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">’</span></sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">= pD</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">w</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">/[2.3</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">×</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">(R</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">φ<span>-</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> 6.4)+p]</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"> (<span>公式二</span><span>)</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>式中</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">: </span><span style="line-height:150%;font-family:宋体;font-size:12pt;">p<span>—计算管段的最大工作压力 (</span><span>MP</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">a</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>)</span> </span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p style="text-indent:36pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">D</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">w</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">—排水管外径 <span>(</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">cm</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"> )</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:31.5pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> </span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">R</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">—管材许用应力(<span>MP</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">a</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>)</span>,</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:31.5pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> 10</span><sup><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:super;">#</span></sup><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;"> </span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>钢</span>: R=85, 15</span><sup><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:super;">#</span></sup><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;"> </span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>钢</span>: R=95, 20</span><sup><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:super;">#</span></sup><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;"> </span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>钢</span>: R=100</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:31.5pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> φ—管子焊缝系数。 无缝钢管取<span>1;</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:60pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>螺旋焊接钢管:双面焊,全部探伤取</span>1.</span><u><span style="line-height:150%;font-family:宋体;font-size:12pt;text-decoration:underline;"></span></u> </p> <p style="text-indent:-48pt;margin-left:79.25pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;">; <span>螺旋焊接钢管:双面焊,不探伤取</span><span>0.7.</span></span><u><span style="line-height:150%;font-family:宋体;font-size:12pt;text-decoration:underline;"></span></u> </p> <p style="text-indent:36pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">C</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">—计入制造负偏差和腐蚀的附加厚度:</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p style="text-indent:60pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>无缝钢管</span>: </span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">C</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">=</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">0.15(</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">δ</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">’</span></sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">+1)</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"> </span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> (cm)</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>说明</span>: <span>管壁厚度计算公式较多,煤炭系统比较公认的为四大件设计手册中所推荐的公式,即</span><span>(</span><span>公式一</span><span>)</span><span>。因此</span></span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>,</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>在《煤矿井下排水泵站及排水管路设计规范》未批准实施前</span>,<span>设计宜采用</span><span>(</span><span>公式一</span><span>)</span><span>计算。但因按</span><span>(</span><span>公式二</span><span>) </span><span>计算的管壁厚度比按</span><span>(</span><span>公式一</span><span>) </span><span>计算的厚度大</span></span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>,</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>所以在上述设计规范批准后</span></span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>,</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>则应采用</span>(<span>公式二</span><span>)</span><span>计算,以使设计符合规范要求。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;">4<span>、根据计算的</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">d</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>和</span>δ,选择标准无缝钢管。</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;">5<span>、吸水管</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">d</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">,</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>一般比排水管</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">d</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>大一级,取</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">d</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">,</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">=</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> d</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">+0</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">025<span>(</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">m</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>),根据</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">d</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">,</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"> <span>选择标准钢管中管壁最薄的管子即可。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <b><span style="line-height:150%;font-family:宋体;font-size:12pt;font-weight:bold;"><span>四、确定水泵工况点,检验排水系统(包括水泵和管路)设计选型计算的符合性。</span></span></b><b><span style="font-family:宋体;font-size:10.5pt;font-weight:bold;"></span></b> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> <span>确定水泵工况点,就是求出水泵</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">H-Q</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>特性曲线和管网特性曲线</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">H= H</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">c</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> </span><span style="line-height:150%;font-family:宋体;font-size:12pt;">+</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">RQ</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoBodyText"> <span style="line-height:150%;font-family:宋体;font-size:12pt;font-weight:normal;"><span>的交点</span></span><span style="font-family:宋体;font-size:16pt;font-weight:normal;"><span>。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;font-weight:normal;"><span>鉴于水泵样本给出的</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;font-weight:normal;">H-Q</span><span style="line-height:150%;font-family:宋体;font-size:12pt;font-weight:normal;"><span>特性曲线,系由厂家通过模拟试验数据绘制而成,并不存在</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;font-weight:normal;">H</span><span style="line-height:150%;font-family:宋体;font-size:12pt;font-weight:normal;">=</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;font-weight:normal;">f(Q)</span><span style="line-height:150%;font-family:宋体;font-size:12pt;font-weight:normal;"><span>函数关系,因此,不能利用解方程求解。目前一般都采用作图法确定水泵运行工况,其方法有二。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;font-weight:normal;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>1、第一种方法,也即我院目前使用的方法,其步骤如下:</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>1<span>)、首先分段计算管路损失Δ</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> ①、 吸水管部分 </span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p style="text-indent:31.5pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;">Δ</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">=(</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">λ</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">L</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">/d</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">+</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">∑ζ</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">)</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">V</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">/2g</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p style="text-indent:24pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;">∵ </span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">V=Q/900</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">π</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">d</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> </span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p style="text-indent:24pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;">∴Δ</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> =(</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">λ</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">L</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">/d</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">+</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">∑ζ</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">)Q</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">/2g</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">900</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">π</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">d</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>)</span></span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">=R</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> Q</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>式中</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> R</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">=(</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">λ</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">L</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">/d</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">+</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">∑ζ</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">) /2g</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">900</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">π</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">d</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>)</span></span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p style="text-indent:24pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;">②、排水管部分 </span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:35.5pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">a</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>、水泵出口至排水干管段</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;">Δ</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p1</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">=(</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">λ</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p1</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">L</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p1</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">/d</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p1</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">+</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">∑ζ</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p1</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">)</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">V</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p1</span></sub><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">/2g </span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> </span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span> </span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">=(</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">λ</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p1</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">L</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p1</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">/d</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p1</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">+</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">∑ζ</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p1</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">)Q</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">/2g</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">900</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">π</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">d</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p1</span></sub><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>)</span></span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">=R</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p1</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> Q</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>式中 </span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> R</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p1</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">=(</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">λ</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p1</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">L</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p1</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">/d</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p1</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">+</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">∑ζ</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p1</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">)/2g (900</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">π</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">d</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p1</span></sub><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">)</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> </span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p style="text-indent:36pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">b</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>、排水干管段</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;">Δ</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p2</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">=(</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">λ</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p2</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">L</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p2</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">/d</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p2</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">+</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">∑ζ</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p2</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">)</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">V</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p2</span></sub><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">/2g </span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p style="text-indent:31.5pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> </span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">=(</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">λ</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p2</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">L</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p2</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">/d</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p2</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">+</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">∑ζ</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p2</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">)</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">nQ</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>)</span></span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">/2g</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">900</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">π</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">d</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p2</span></sub><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>)</span></span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;">=</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">R</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p2</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> Q</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>式中</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">: R</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p</span></sub><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">2</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">= n</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> (</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">λ</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p2</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">L</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p2</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">/d</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p2</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">+</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">∑ζ</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p2</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">)/2g</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">900</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">π</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">d</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p2</span></sub><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>)</span></span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:36pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">c</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>、排水管部分阻力损失之和,按水泵与管路运行情况分别计算:</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:24pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;">Δ</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">=</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">Δ</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p1</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">+</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">Δ</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p2</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">= (R</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p1</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">+n</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> R</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p2</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">) Q</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>2<span>)、绘制管网特性曲线</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">H= H</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">c</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> </span><span style="line-height:150%;font-family:宋体;font-size:12pt;">+</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">RQ</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;"> </span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> <span>式中</span> </span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">H</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">c</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">—测量高度,</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">H</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">c</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">=</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> H</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">+H</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"> </span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:36pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">R</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">— 管道阻力,</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">R</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">=</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> R</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"> +</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> R</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p1</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">+</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> n</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> R</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p2</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>,</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:36pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>将</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">H</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">c</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>、</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> R</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>数值代入,并考虑因沉积物使管径变小阻力增大系数,则</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:36pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">H</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"> =</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> H</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">+H</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">+1</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">7<span>(</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">R</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"> +</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> R</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p1</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">+</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> n</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> R</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p2</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>)</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(新管则不乘</span>1</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">7<span>系数)。在不同的</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">n</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>值下(</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">n</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">=1<span>、</span><span>2</span><span>、</span><span>3</span><span>),给出不同的</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>值,即可绘出管网特性曲线</span> <span>。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>3<span>)、确定水泵运行工况点</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>水泵样本给出的</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">H-Q</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>特性曲线和绘出的管网特性曲线</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">H= H</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">c</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> </span><span style="line-height:150%;font-family:宋体;font-size:12pt;">+</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">RQ</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">,</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>两条特性曲线的交点</span>M<span>即为水泵运行工况点(如图</span><span>1</span><span>)。该点对应的</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>、</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">H</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>、</span>η、</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">npsh</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>,即是水泵运行时的流量、扬程、效率和必须的汽蚀余量。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> <span>(贴插图</span>1<span>)</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>4<span>)、根据工况点对应的</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>、</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">H</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>,检验矿井最大涌水量和正常涌水量时水泵工作台数、管路趟数及每天水泵工作时间。水泵和管路的各种配合运行方式,均应能保证水泵每天工作时间不超过</span>20</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>。从图</span>1<span>可知,此时水泵的实际流量为</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">b</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>',则要求:</span>T</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">=24</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">z</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">/</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">n Q</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">b</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>'</span>≤ <span>20</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>,</span>T</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">2</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">=24</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">m</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"> /</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">n Q</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">b</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>'</span>≤ <span>20</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"> <span>。同时检验排水管中水的流速,</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">V= n Q</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">b</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>'</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">/900</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">π</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">d</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"> p2</span></sub><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>,如超出经济流速范围,则应调整管路系统,或采取其它措施,直至满足要求。</span> </span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">(5)</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>、计算电动机的容量:</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>先按一管一泵(</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">n</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">=1<span>)运行时水泵工况点对应的</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>、</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">H</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>、</span>η计算出水泵的轴功率:</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">N=QHr/102</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">×</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">3600</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">η</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>电动机的容量:</span>N</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">d</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">’=</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">K</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">QHr/102</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">×</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">3600</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">ηη</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">m</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>,</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>式中</span> K<span>—电动机容量的富余系数,</span><span>K=1</span></span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">1~1</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">2<span>,</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:24pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;">η</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">m</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">—傳动效率,直联取<span>1</span><span>,联轴节取</span><span>1</span></span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">2<span>,</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:36pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">r</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"> —矿井水的容重,一般</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">r</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">=1020</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> kg/m</span><sup><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:super;">3</span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="margin-left:21pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>根据</span>N</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">d</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">’</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>选择电动机。(一般电动机由水泵厂成套供应)。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>6<span>)、按水泵在管路未淤积前(即新管)一管一泵运行时水泵的工况计算水泵的轴功率,检验电动机是否过负荷。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>2、第二种方法</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">,</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>即四大件设计手册中介绍的方法,其步骤如下:</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>1<span>)、首先分段计算出管路损失Δ</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;">Δ</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">=<span>Δ</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">+<span>Δ</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p1</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">+<span>Δ</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">p2</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>,按一管一泵(</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">n</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">=1<span>)运行,计算公式与第一种方法相同。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>2<span>)、水泵总扬程</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="margin-left:21pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">H</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">Z</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">= H</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">c</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> </span><span style="line-height:150%;font-family:宋体;font-size:12pt;">+1</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">7<span>Δ</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">+1<span>(新管则不乘</span><span>1</span></span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">7<span>系数)</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>3<span>)、建立管网特性曲线</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">H</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">Z</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">= H</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">c</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> </span><span style="line-height:150%;font-family:宋体;font-size:12pt;">+</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">RQ</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:24pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">R</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">=<span>(</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">H</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">Z</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">-</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> H</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">c</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>)</span>/</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> Q</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>,</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>4<span>)、确定水泵运行工况点</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> </span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span> </span>①、一管一台泵运行时水泵的工况点确定</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:36pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>一台水泵的</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">H-Q</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>特性曲线和管网特性曲线</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">H= H</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">c</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> </span><span style="line-height:150%;font-family:宋体;font-size:12pt;">+</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">RQ</span><sup><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>两条特性曲线的交点</span>3<span>即为水泵运行工况点,见图</span><span>2</span><span>)</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> <span> </span>②、一管二台泵并联运行时水泵的工况点确定</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> <span>两台同型号水泵并联特性曲线的绘制,是在相同扬程条件下,两台水泵流量相加绘成的,如图</span>2<span>所示。它与管网特性曲线(按一管一台泵运行)之交点</span><span>1</span><span>即为二台并联水泵的工况点,点</span><span>1</span><span>对应的</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>、</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">H</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>为并联工作水泵的实际流量和扬程;点2为并联工作时每台水泵的工作点;点3为一台水泵单独工作时的工作点。从图</span>2<span>可知,</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">=</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> Q’</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>+</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q’</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>=</span> 2</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> Q’</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>,一般</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">=<span>(</span><span>1</span></span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">8~1</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">6<span>)</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>。</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p style="text-indent:72pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(贴插图</span>2<span>)</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> </span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p style="text-indent:24pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:24pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:24pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:24pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:24pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;">③、一管三台泵并联运行时水泵的工况点确定</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> <span>与一管二台泵并联运行时水泵的工况点确定方法相同,如图</span>3<span>所示。</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p style="text-indent:72pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(贴插图</span>3<span>)</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> <span> </span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;">④、三台相同水泵向两条管路输水的并联工作,如图<span>4</span><span>所示。除了一条管路的特性曲线</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">C</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">—</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">E</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>外,还要绘制两条管路的合成特性曲线</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">C—E’</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>。合成特性曲线的绘制,是在同一扬程下把管路中的流量相加而成。图中:点</span>1<span>定出泵站的最大输水量,点</span><span>2</span><span>定出每条管路中的输水量,点3定出每台水泵的输水量。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:84pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(贴插图</span>4<span>)</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;">⑤选择电动机和计算水泵工作时间,与第一种方法相同。</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">3</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>、两种方法的比较</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span> 第一种方法是先计算出一管一泵或一管多泵管路特性曲线,它们与水泵特性曲线的交点即为水泵运行工况点,也就是先定出单台水泵</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>,再计算泵站输水量。而第二种方法则是先定泵站输水量,再定出每台水泵</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>。但两种方法的共同点都是基于水泵并联运行时管中的流量</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>成倍增加,并以此绘制并联后的水泵特性曲线和管路特性曲线。实际上流量</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>并不是成倍增加(约为1</span></span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>8~1</span></span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>6倍),因而都存在一定的误差。但第一种方法中并联管路特性曲线是通过计算后一次绘制的,而第二种方法中并联管路特性曲线是通过人工二次合成的,因而相对误差较第一种方法为大。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <b><span style="line-height:150%;font-family:宋体;font-size:12pt;font-weight:bold;"><span>五、泵站布置</span></span></b><b><span style="line-height:150%;font-family:宋体;font-size:12pt;font-weight:bold;"></span></b> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> 1<span>、泵站主要尺寸</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:31.5pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>1<span>)、泵站长度 </span><span>L=</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">n</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"> L</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> +(n-1)</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"> L</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">2</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">+(3~5) (m)</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p style="text-indent:31.5pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>式中</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">:</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"> L</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">—机组长度,</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:-60pt;margin-left:91.25pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> L</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">2</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">—机组间净间距,应满足电动机抽芯和水泵检修的需要, </span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:60pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;">3~5</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> m</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>是考虑值班室和堆放检修工具及零配件的需要,可视具体情况而定。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:31.5pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>2<span>)、泵站宽度 </span><span>B=B</span></span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">+1/2B</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">2</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">+B</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">3</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">+B</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">4</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">+B</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">5</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">+0</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">3 </span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">(m)</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>式中</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">:</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"> B</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">—机组基础边(靠吸水井侧)至硐室壁的距离,</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:-60pt;margin-left:91.25pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> B</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">2</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">—机组基础宽度</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:-60pt;margin-left:91.25pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> B</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">3</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">—水泵或电动机外型(靠轨道侧)至基础中心距离,</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:-60pt;margin-left:91.25pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> B</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">4</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">—水泵或电动机或平板车中最大件宽度</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:-60pt;margin-left:91.25pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>,</span>B</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">5</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">—水泵启动控制箱的厚度,</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:-60pt;margin-left:91.25pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> 0</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">3</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> m</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>为考虑最大件通过轨道运输时两侧预留的间隙。</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p style="text-indent:-60pt;margin-left:91.25pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">(3)</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>、起重高度</span>H=</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">+h</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">2</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">+h</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">3</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">+h</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">4</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">+h</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">5</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">+h</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">6</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">+h</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">7</span></sub><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;"></span></sub> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>式中</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">:</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"> </span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">1</span></sub><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">——</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">-<span>机组基础高度</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:40.2pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">2</span></sub><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">——</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>水泵轴中心至机组基础高度</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:24pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> </span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">3<span>——</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>附加短管高度(不加时,</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">3</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">=0<span>)</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:36pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">4<span>——</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>闸阀高度(当止回阀采用多功能控制阀时,</span> </span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">4</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">=0<span>)</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:36pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">5<span>——</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>止回阀或多功能控制阀高度</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:36pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">6<span>——</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>三通高度</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p style="text-indent:36pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">7<span>——</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>起重吊钩至起重梁底面高度</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:24pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>但当排水干管敷设在起重梁下时</span></span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>,</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>其</span>H<span>应满足法兰底部距泵站地面</span><span>1</span></span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">8</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> m</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>的要求。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;">2<span>、其他相关尺寸</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> <span>(</span>1<span>)、水泵、吸水管、配水井、吸水井及水仓相互之间主要尺寸关系如图所示。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> </span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> </span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:84pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(贴插图)</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> </span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">a</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">0</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> </span><span style="line-height:150%;font-family:宋体;font-size:12pt;">——短管长度,可根据实际情况确定;</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">a</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">——偏心异径管长度,不宜小于大小管径差的<span>5</span><span>倍;</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">a</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">0</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">+</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">a</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>)</span>——水泵入口前直管段总长度,不宜小于<span>3</span><span>倍的水泵吸水口直径;</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">b</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">l</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">——吸水管滤网中心线距最近井壁的距离,距后壁可取(<span>0</span></span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">8~1</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">0<span>)</span><span>D</span></span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>;距侧壁可取</span>1</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">5 D</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>,</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>且不小于</span>D</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">+100</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">mm;</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;">D</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">————</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>吸水管滤网直径;</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;">D</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">N</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">——配水闸阀公称直径;</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">c</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">——配水闸阀之间最小净距,不应小于<span>150</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">mm</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>;</span></span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"></span></sub> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">c</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">2</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">——配水闸阀操作手轮之间净距,不应小于<span>500</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">mm</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>;</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">c</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">3</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">——配水闸阀操作手轮距配水井井壁间距,不应小于<span>700</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">mm</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>;当双配水井集中布置共享一个壁龛时,可不受限制;</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">c</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">4</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">——配水闸阀法兰距配水井井壁间距,不应小于<span>200</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">mm</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>;</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">l</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">——配(吸)水井最低水位到吸水管滤网上缘距离</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>,</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>不得小于(</span>1~1</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">25<span>)</span><span>D</span></span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>,且不得小于</span>500</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">mm</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>;</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">h</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">——吸水管滤网下缘距吸水井底距离,不得小于(<span>0</span></span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">6~0</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;"><span>。</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">8<span>)</span><span>D</span></span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>,且不得小于</span>500</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">mm</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>;</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">l</span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">——吸水管滤网中心线至吸水井入口距离,不得小于<span>4D</span></span><sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;vertical-align:sub;">x</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>2<span>)、吸水井</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> <span>每台水泵宜单独使用一个吸水井,确定吸水井直径时应考虑水泵工作时吸水井內水面波动不太大,同时应考虑安装、检修、清理吸水井的需要。一般</span>D<span>≥</span><span>1500</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">mm</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> <span>(</span>3<span>)、配水井</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> <span>一般配水井兼作吸水井,其尺寸大小应根据安装设备多少,考虑安装、检修、清理工作需要。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <b><span style="line-height:150%;font-family:宋体;font-size:12pt;font-weight:bold;"><span>六、管路布置与安装</span></span></b><b><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;font-weight:bold;"></span></b> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> 1<span>、管路敷设</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> <span>(</span>1<span>)、立井井筒中排水管敷设位置应与采矿专业协商,尽可能靠近梯子间,并留有足够的安装、检修和更换空间。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>2<span>)、立井井筒中排水管底部应设置弯头管座及其支承梁。当排水管路垂高较大(大于</span><span>400</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">m</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>)时,应在中间加设直管座及支承梁,其间距取</span>100~150</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">m</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>3<span>)、排水管在井筒中间用管卡固定在防弯梁上。防弯梁一般利用罐道梁或梯子间梁,不能利用时,应设单独的防弯梁。管卡只起导向作用。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>4<span>)、排水管在斜井中沿底板敷设时,可用水泥墩支承,沿井壁敷设时,用梁支承。在管路最下部和中间设置防滑支墩或支承梁,防止管路下滑。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> 2<span>、主排水管路连接</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>1<span>)、当条件允许时应采用焊接连接。为了安装和检修方便,可部分焊接,部分法兰连接。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>2<span>)、采用法兰连接时,与水泵和阀门等管路附件连接的法兰,应采用</span><span>JB</span><span>法兰,而管路连接的法兰宜采用</span><span>GB</span><span>法兰。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"> 3<span>、管路支承梁计算</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>1<span>)、管路支承梁一般可直接选用槽钢、工字钢、</span><span>H</span><span>型钢等热扎普通型钢,必要时也可根据荷载需要,制作等截面焊接工字形的支承梁。钢材宜采用</span><span>Q345</span><span>钢。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>2<span>)、支承梁荷载</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> a</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>、支承梁自重:即所选钢梁单位重量,可视为均布荷载。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> b</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>、管重:应取支承梁以上相应管段排水管和连接件以及防腐材料的重量之和;</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> c</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>、水柱重量:底部支承梁所支承管路中的水重,并考虑水锤影响。建议采用多功能水泵控制阀取代止回阀,以减轻水锤冲击力。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">d</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>、其它荷载:如果压风管、洒水管等也敷设于该支承梁上,亦应计入;</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">e</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>、温度变化引起的作用力:</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">Q=A*E*</span><span style="line-height:150%;font-family:宋体;font-size:12pt;">α</span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">*(T</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">2</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">-T</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">)</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>式中,</span>A<span>——水管横断面的金属面积(</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">mm</span><sup><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>);</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:48pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;">E<span>——钢材弹性模量(</span><span>N/</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> mm</span><sup><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:super;">2</span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>);</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:48pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;">α——钢材线膨胀系数;</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:48pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">T</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">2<span>————</span></span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>所论管段的环境最高温度(</span></span><sup><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:super;"><span>。</span></span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;">C<span>);</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:48pt;" class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;">T</span><sub><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:sub;">1</span></sub><span style="line-height:150%;font-family:宋体;font-size:12pt;">——管路安装时的环境温度(</span><sup><span style="line-height:150%;font-family:宋体;font-size:12pt;vertical-align:super;"><span>。</span></span></sup><span style="line-height:150%;font-family:宋体;font-size:12pt;">C<span>)。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>3<span>)、支承梁可视为在一个主平面內受弯构件,并按国家标准《钢结构支设计规范》(</span><span>GB50017-2003</span><span>)的有关规定计算其强度和稳定性。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>(</span>4<span>)、由于支承梁安装在井筒中,一般均在</span><span>5</span></span><span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"> m</span><span style="line-height:150%;font-family:宋体;font-size:12pt;"><span>左右,比较短,且所选作支承梁用的型钢的高厚比均较大,其刚度(挠度)一般可不予计算。</span></span><span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p style="text-indent:12pt;" class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:宋体;font-size:12pt;"></span> </p> <p class="MsoNormal"> <span style="line-height:150%;font-family:'Times New Roman';font-size:12pt;"></span> </p> <p style="text-indent:52.2pt;" class="MsoNormal"> <u><span style="line-height:150%;font-family:宋体;font-size:12pt;text-decoration:underline;"></span></u> </p>
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