基于中间气压罐和罐前逆止阀的浮船泵站水锤防护  

Water Hammer Prevention of Floating Pumping Station Based on Pipeline Middle Air Chamber and Its Front Check Valve

作　　者：洪智 周暄礼 刘志勇[2] HONG Zhi;ZHOU Xuan-li;LIU Zhi-yong(Changjiang Water Resources and Hydropower Development Group Co.,LTD,Wuhan 430014,Hubei Province,China;School of Power and Mechanical Engineering,Wuhan University,Wuhan 430072,Hubei Province,China)

机构地区：[1]长江水利水电开发集团(湖北)有限公司,湖北武汉430014 [2]武汉大学动力与机械学院,湖北武汉430072

出　　处：《中国农村水利水电》2024年第4期182-186,共5页China Rural Water and Hydropower

摘　　要：以云南省元谋县金沙江光伏提水工程的第一级浮船泵站供水系统为例,开展了浮船泵站水锤防护的研究。在参考相关设计规范的基础上,确定了停泵水锤防护标准;通过比较不同水源水位和停泵台数对过渡过程的影响,确定水锤防护的控制工况为水源水位最低、运行机组全部停泵的工况;根据管道沿线地形和浮船泵站的特点,在分析泵出口阀关闭程序、中间气压罐防护效果、罐前逆止阀作用的基础上,提出了“泵出口轴流式逆止阀+中间气压罐+罐前逆止阀”的水锤防护方案。该方案通过泵出口轴流式逆止阀完全防止机组倒转,通过中间气压罐控制管线中的正负水锤压力,通过罐前逆止阀防止倒泄水流对浮船和摇臂联络管的冲击。该防护措施对类似工程有较好的参考意义。Taking the first stage floating pump station of Jinsha River photovoltaic water-lifting project in Yuanmo County,Yunnan Province as an example,the water hammer prevention of floating pump station is studied.On the basis of reference to the rules of relevant design codes,the pump-stopping water hammer protection standard is determined.By comparing the influence of different inlet water level and the number of stopping-pump on the transient,it is determined that the working condition of the lowest inlet water level with all the operating units stopping is the most unfavorable conditions for the water hammer protection.According to the pipeline topography and the characteris⁃tics of the floating pump station,and based on the analysis of transient of various working conditions,the water hammer protection scheme of“axial flow check valve at pump outlet+axial flow check valve in front of air chamber+onshore air chamber”is recommended.The scheme completely prevents the unit from reversing through the axial flow check valve at the pump outlet,eliminates the vaporization phenomenon and reduces the positive water hammer pressure in the pipeline through the onshore air chamber,and prevents the impact of the backflow wa⁃ter on the float and rocker pipe through the check valve in front of the air chamber.The protective measures have good reference significance for similar projects.

关 键 词：浮船泵站 轴流式逆止阀 中间气压罐 罐前逆止阀 停泵水锤防护 

分 类 号：TU991.1[建筑科学—市政工程] TV67[水利工程—水利水电工程]