长距离重力流输水管线水锤计算及防护研究

Calculation and prevention of water hammer for long distance gravity flow water conveyance pipelines

为进一步研究长距离重力流输水管线的水锤现象,以兴安盟经济技术开发区工业供水工程为背景,根据一维水锤计算基本原理,计算分析了阀门两阶段线性关闭快慢和组合关闭方式对长距离重力流输水管线水锤作用的规律,并在此基础上研究了关阀总时间对管线水锤压力的影响。结果表明:阀门第1阶段快速关闭的幅度越大,则管线沿程水锤压力越大;阀门同时关闭时管线水锤压力较大,交错关闭时水锤压力较小;延长关阀总时间有利于减小管线水锤压力,该工程两阶段线性关闭最佳历时为1400 s。该研究对长距离重力流输水管线的安全运行具有一定的参考作用。

In order to further study the water hammer phenomenon in long distance gravity flow water conveyance pipelines,the industrial water supply project in Hinggan League Economic and Technological Development Zone was taken as the research object to study the influence of two-stage linear closing speed and combined valve closing schemes on the water hammer in the long distance gravity flow water conveyance pipeline,according to the basic principle of one-dimensional water hammer calculation.On this basis,the influence of total valve closing time on pipeline water hammer pressure was studied.The results indicate that the water hammer pressure along the pipeline increases with the increase of the opening of the rapid closing valve in the first stage;when the valves are closed at the same time,the water hammer pressure of the pipeline is large,and when the valves are closed alternately,the water hammer pressure is relatively small;prolonging the total valve closing time is conducive to reducing the water hammer pressure of the pipeline,and the optimal duration for two-stage linear closing of the project is 1,400 s.The study has a certain guiding value for the safe operation of long distance gravity flow water conveyance pipelines.