江淮水利科技Issue(3)：42-46,5.DOI:10.20011/j.cnki.JHWR.202503007
长距离重力输水工程水锤泄放阀口径对二次防护效果的影响
Influence of surge relief valve diameter on secondary protection effectiveness in long-distance gravity water transmission systems
摘要
Abstract
To determine appropriate secondary protection measures for surge relief valves,this study focused on the characteris-tics of long-distance gravity pressurized flow systems.The method for analyzing pipeline transient flow was established based on the water hammer characteristic equations.Using Bentley Haestad Hammer software,a hydraulic transient simulation was conducted for the gravity flow section of the Shaheji branch in the Chuzhou water supply guarantee project for the Yangtze river delta integration demonstration zone.The study evaluated the protective performance of surge relief valves with four different diameters under the scenario of valve closure-induced water hammer at the pipeline terminus.Calculation results showed that the use of DN300,DN400,DN500 and DN600 four calibre water hammer relief valve transient process peak water pressure were 156.12,103.02,85.85 and 83.96 m,respectively,the boost ratio of 53.40,32.78,26.20 and 24.67,respectively,the pres-sure fluctuations at the end of the valve area were 11.47～156.47,11.47～103.66,11.47～79.76 and 11.47～75.29 m.By comparing the water hammer effect of different calibres of water hammer relief valves,it could be considered that increasing the calibres of water hammer relief valves can significantly improve the reduction effect of transient shut-off peak water pressure,but the increase in calibre existed in the phenomenon of marginal effect.Water hammer relief valve calibre selection for the main pipe diameter between 28.6%～35.7%was more appropriate.关键词
关阀水锤/二次保护措施/边际效应/水锤泄放阀Key words
shut-off valve water hammer/secondary protection measures/marginal effect/surge relief valve分类
建筑与水利引用本文复制引用
李云洲,杨文涌,黄毅,姜舒怀..长距离重力输水工程水锤泄放阀口径对二次防护效果的影响[J].江淮水利科技,2025,(3):42-46,5.基金项目
长江勘测规划设计研究有限责任公司自主创新项目(CX2024S018、CX2024S021、CX2022Z20) （CX2024S018、CX2024S021、CX2022Z20）
