长距离重力流输水工程多支管运行方案水锤研究

Water Hammer Analysis of Multi-branch Pipes in Long Distance Gravity Flow

结合KYPipe2010水锤分析软件,对多支管运行的重力流输水问题进行了分析研究,发现随着支管关闭数量增加,流量改变量越大,造成的水锤升压越严重,对管道的安全更为不利;在管道沿线有驼峰高点,若对各支管及主管道末端流量不加控制,将可能会出现较大的压降,造成驼峰高点处出现负压,还会出现分支管由于供水压力过低,造成引水困难,影响整个管道系统的安全,需要增设稳压持压阀来解决;各分水口处的水锤升压均较高,均超过了分水支管的管道承压能力,在各分水口处设置可调式减压阀后,可有效降低分水口处的水锤升压,达到了水锤防护的目的。

Combined with KYPipe2010 water hammer analysis software,this paper analyzed the water transmission problem of gravity flow in multi-branch pipe operation.It was found that with the increase of the number of branch pipe closure,the larger the flow change,the more serious the water hammer pressure rise,which was more adverse to the safety of the pipe.If there is a hump along the pipeline,and each branch and the end of the main flow without control,will appear larger pressure drop,therefore cause negative pressure at the hump.There also will be water supply issues due to water supply pressure is too low,which will affect the safety of the pipeline system,and voltage holding pressure valve needed to be installed to solve this problem.The pressure rise of water hammer at each water distribution outlet is high,both of which exceed the pressure bearing capacity of the pipe of water distribution branch.After setting adjustable pressure reducing valve at each water distribution outlet,the pressure rise of water hammer at the water distribution outlet can be effectively reduced,and prevent water hammer.