基于供水工程中重力流的水锤联合防护措施研究

Research on Combined Protection Measures of Water Hammer Based on Gravity Flow in Water Supply Engineering

根据水锤计算基本原理建立超压泄压阀边界条件、出口阀门边界条件以及水锤计算模型,通过数值模拟计算有效解决了水锤防护在长距离重力流输水系统中存在的问题,为输水系统提供一种新的水锤防护途径。文章以北方某供水工程为例,对重力流部分的联合超压泄压阀、两阶段关阀和线性关阀多种防护措施,运用计算机仿真技术进行模拟研究。结果显示:为保证供水工程的安全运行可采取超压泄压阀设置及关阀规模优化措施,研究成果可为重力流水锤联合防护提供一定决策依据。

According to the basic principle of water hammer calculation,the boundary conditions of the superpressure relief valve,the exit valve boundary conditions and the calculation model of water hammer are established,and the problems existing in water hammer protection in long-distance gravity flow water transmission system are effectively solved by numerical simulation.It provides a new way of water hammer protection for water delivery system.Taking a water supply project in the north as an example,this paper uses computer simulation technology to study the combined superpressure relief valve,two-stage shut-off valve and linear shut-off valve.The results show that for the safe operation of water supply engineering,the setting of superpressure relief valve and the optimization measures of closing valve size can be adopted,and the research results can provide a certain decision-making basis for the combined protection of gravity hammer.