空气罐及空气阀联合水锤防护的应用  

Protective Design of Water Hammer for Pumping Stations

作　　者：吴旭敏 马子恒 李高会 周天驰 杨绍佳 WU Xumin;MA Ziheng;LI Gaohui;ZHOU Tianchi;YANG Shaojia(Powerchina Huadong Engineering Corporation,Hangzhou 311122,China;Stecol Corporation,Tianjing 300384,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]中国电建市政建设集团,天津300384

出　　处：《灌溉排水学报》2021年第8期93-98,共6页Journal of Irrigation and Drainage

摘　　要：【目的】探讨空气罐及空气阀联合水锤防护在长距离高扬程供水工程中的应用效果。【方法】本文结合某供水工程,建立了空气罐节点控制条件,空气阀边界条件,基于特征线法通过长距离输水工程水锤仿真计算软件HysimCity建立泵站以及泵后管道段的计算模型,进行了多种工况下水力过渡过程仿真计算,对比分析了无防护措施、有空气罐及空气阀联合防护对停泵水锤的影响,并进行了空气罐参数等的优选。【结果】采用空气罐和空气阀联合防护,对控制工况,水泵断电后,泵后压力始终大于0 m,空气罐最低水位超出空气罐底高程满足不低于1 m的要求;泵站1—泵站2管道沿程压力满足不低于-5 m,不超过200 m的要求。【结论】空气罐及空气阀联合防护对抑制正负水锤的影响是有利的,且联合防护效果良好。【Background and Objective】Long-distance water conveyance is common in countries with uneven water distribution like China.Resolving water hammer is an issue faced in water-conveyance projects.The purpose of this paper is to investigate the feasibility of using air tank and air valve in water hammer protection in high-lift pumping stations.【Method】The study was based on a practical project.We first determined the conditions in the air tank nodes and the boundaries of the air valve.Base on the characteristic line method,a numerical model was then developed for the pump station,as well as the pipeline behind the pump,using the HysimCity software-a water hammer software for designing long-distance water conveyance projects.The model was used to simulate hydraulic transition process under different operating conditions,from which we compared and analyzed the effectiveness of the air tank and air valve in protecting water hammer when the pump was power off.The operating parameters of the air tank were optimized based on the numerical results.【Result】The air tank and air valve were effective in preventing water hammer.When the pump was powered off,water pressure in the regions proximal to the pump was always greater than zero,and the lowest water level in the air tank was higher than the elevation of the tank bottom.These met the design requirements that the water level in the tank bottom should be more than 1 m deep,and the pressure in the pipelines between two adjacent pump stations should be more than-5 m and less than 200 m.【Conclusion】The air tank and the air valve can be used in a combination to protect pump stations from water hammer,and our results showed that they were effective and meet the design requirements.

关 键 词：供水工程 水锤 空气罐 空气阀 

分 类 号：S227.9[农业科学—农业机械化工程] TV674[农业科学—农业工程]