排灌机械工程学报2025，Vol.43Issue(10)：1007-1015,9.DOI:10.3969/j.issn.1674-8530.24.0141
重力流高起伏输水工程关阀规律与空气罐结构优化
Valve closing law and air tank structure optimization of gravity flow high-fluctuation water conveyance project
摘要
Abstract
Aiming at the problem of valve closing water hammer caused by the closing of the end valve in the long-distance gravity flow high-fluctuation water conveyance system,a gravity flow water convey-ance project in Xinjiang was taken as an example.The valve closing law without protective measures and the influence of its parameters on the water hammer pressure after the arrangement of the air tank were studied by numerical simulation method.The influence of the diameter,volume and water volume ratio of the air tank connecting pipe on the maximum pressure head were compared through orthogonal experiment and range analysis.The results show that when no protective measures are taken,the two-stage valve closing is better than the linear valve closing.The fast-closing time accounts for 30％of the total closing time and the fast closing angle is 85％,so the two-stage valve closing is the optimal valve closing method.When the total closing time is 100 s and 200 s,the maximum pressure head under the two-stage valve closing is 35.7％and 38.3％lower than that under the linear valve closing,respective-ly,but the negative pressure in the whole line is serious.The order of the influencing factors of redu-cing the maximum pressure head of the air tank from high to low is as follows:the diameter of the con-necting pipe,the volume of the air tank,the proportion of the water volume.After selecting the optimal air tank parameters,the maximum pressure head reduces by 31.6％,and the minimum pressure head increases by 91.0％,which meets the protection standard.关键词
重力流/水锤/关阀规律/空气罐/参数优化/联合防护Key words
gravity flow/water hammer/valve closing law/air tank/parameter optimization/joint protection分类
农业工程引用本文复制引用
王义淞,张小莹,边少康..重力流高起伏输水工程关阀规律与空气罐结构优化[J].排灌机械工程学报,2025,43(10):1007-1015,9.基金项目
自治区教育厅高校基本科研业务费建设类项目(XJEDU2024J046) （XJEDU2024J046）
天山英才培养计划青年托举人才项目(2023TSYCQNTJ0014) （2023TSYCQNTJ0014）
中央引导地方科技发展资金项目(ZYYD2024CG20) （ZYYD2024CG20）
