复杂重力流供水系统水力过渡过程分析与水锤防护设计  

Hydraulic Transient Analysis and Water Hammer Protection Design of Complex Gravity Flow Water Supply System

作　　者：周天驰 李高会 仇为鑫 孙哲豪 穆孟婧 ZHOU Tian-chi;LI Gao-hui;QIU Wei-xin;SUN Zhe-hao;MU Meng-jing(Huadong Engineering Corporation Limited,PowerChina,Hangzhou 311122,Zhejiang Province,China;Hohai University,Nanjing 210000,Jiangsu Province,China)

机构地区：[1]中国电建集团华东勘测设计研究院有限公司,杭州311122 [2]河海大学,南京210000

出　　处：《中国农村水利水电》2021年第12期216-221,共6页China Rural Water and Hydropower

摘　　要：临平自来水厂供水工程起点位于千岛湖引水工程余杭分水点,供水对象为临平、仁和、宏畔、塘栖4个水厂,管道直径1.4~2.6 m,总长度30.9 km,远景供水规模43万m^(3)/d,采用全程重力流供水方式,供水用户多、线路复杂,水力过渡过程计算分析复杂、水锤防护设计难度大。首先采用华东院自主开发的供水工程水力过渡过程仿真计算软件Hysimcity进行建模及计算分析,确定供水系统水力过渡过程中压力变化情况;接着针对供水系统各个部位的水力学特点以及整个系统的水力学特性,开展整个输水系统的水锤防护设计。最终确定在临平、仁和、宏畔、塘栖水厂前设置直径1 m的超压泄压阀及各个水厂阀门一段直线关闭的联合水锤防护方案,有效解决了多用户重力流供水系统的水锤问题。The water supply project of Linping waterworks starts from Yuhang water distribution outlet of Qiandaohu Water Diversion Project,supplying for four waterworks of Linping,Renhe,Hongpan and Tangqi.The diameter of the pipeline is 2.6~1.4 m,the total length is 30.9 km,and the prospective water supply scale is 43×10^(4) m^(3)/d.The project adopts gravity flow water supply mode,with many water users and complex lines,so the calculation and analysis of hydraulic transient process is complex and the design of water hammer protection is difficult.In this paper,the hydraulic transient process simulation software-Hysimcity developed by Huadong Engineering Corporation Limited is used for modeling and calculation,and the pressure change of water supply system in the hydraulic transient process is obtained.According to the hydraulic characteristics of the system,the water hammer protection design of the whole water supply system is carried out.After a lot of trial calculation and analysis,when the regulating valve in front of the waterworks is closed in 120 s,the water hammer problem is effectively solved by setting the pressure relief valve with diameter of 1m in front of each waterworks.

关 键 词：复杂供水系统 重力流 水锤防护 超压泄压阀 

分 类 号：TV93[水利工程—水利水电工程] S277.7[农业科学—农业水土工程]