空气罐在高扬程泵站水锤防护中的应用及影响  

The application and influence of air chamber in water hammer protection of high head pumping stations

作　　者：刘有亮 赵斌 胡斌超 刘姝君[2] 史广泰 LIU Youliang;ZHAO Bin;HU Binchao;LIU Shujun;SHI Guangtai(Gansu Water Resources and Hydroelectric Investigation&Design Institute Co.,Ltd.,Lanzhou 730000,China;College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730030,China;School of Energy and Power Engineering,Xihua University,Chengdu 610039,China)

机构地区：[1]甘肃省水利水电勘测设计研究院有限责任公司,兰州730000 [2]兰州理工大学能源与动力工程学院,兰州730030 [3]西华大学能源与动力工程学院,成都610039

出　　处：《给水排水》2024年第7期136-141,共6页Water & Wastewater Engineering

基　　金：甘肃省高等学校创新基金项目(2022A2022);甘肃省自然科学基金(22JR5RA-249);四川省自然科学基金杰出青年科学基金(24NSFJQ0097)。

摘　　要：以甘肃某大型供水工程为研究背景,泵站供水管线起伏明显,泵站扬程高、流量大,事故停泵后管线负压严重,通过增设空气阀无法将负压消除。基于特征线法采用HAMMER软件对该泵站在采用二阶段关闭液控偏心半球阀及空气罐的组合下进行了事故停泵水力过渡过程仿真分析,另分析了空气罐的主要参数对水力过渡过程的影响。计算结果表明:设置空气罐后管线负压明显得到解决;空气罐容积越大、水头损失比率越高、水箱进水口直径相对偏小一点,其水锤防护效果越好;空气罐初次向管道补水和吸收管道水在水锤防护过程发挥重要作用;不同参数下空气罐首次向管道补水的时间几乎相同。Taking a large-scale water supply project in Gansu as the research background,the water supply pipeline of the pumping station has obvious undulations,high head and large flow rate.After the pump was shut down in an accident,the negative pressure in the pipeline was severe,and it cannot be eliminated by adding an air valve.Based on the characteristic line method and HAMMER software,a simulation analysis of the hydraulic transition process of the pump station during emergency pump shutdown was conducted using a combination of two-stage closed hydraulic control eccentric hemisphere valve and air chamber.In addition,the influence of the main parameters of the air chamber on the hydraulic transition process was analyzed.The calculation results show that the negative pressure in the pipeline is significantly solved after setting up the air chamber;The larger the volume of the air chamber,the higher the head loss ratio,and the smaller the diameter of the water tank inlet,the better the water hammer protection effect;The air chamber plays an important role in the water hammer protection process by replenishing and absorbing water from the pipeline for the first time;The time for the air chamber to replenish water to the pipeline for the first time under different parameters is almost the same.

关 键 词：空气罐 水锤防护 水头损失比率 预设压力 供水工程 

分 类 号：TU991[建筑科学—市政工程]