[1]李建宇,魏举旺.长距离重力流输水管线末端关阀水锤分析及防护[J].中国给水排水,2022,38(7):51-55.
　LIJian-yu,WEIJu-wang.Analysis of Valve Closing Water Hammer at the End of Long-distance Gravity Flow Water Transmission Pipeline and Its Protection[J].China Water & Wastewater,2022,38(7):51-55.
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长距离重力流输水管线末端关阀水锤分析及防护

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第38卷 期数: 2022年第7期 页码: 51-55 栏目: 出版日期: 2022-04-01
Title:
Analysis of Valve Closing Water Hammer at the End of Long-distance Gravity Flow Water Transmission Pipeline and Its Protection
作者:
李建宇， 魏举旺
（中国铁路设计集团有限公司 机械动力与环境工程设计研究院，天津 300308）
Author(s):
LI　Jian-yu， WEI　Ju-wang
（Design and Research Institute of Mechanical Power and Environmental Engineering， China Railway Design Corporation， Tianjin 300308， China）
关键词:
长距离输水管线;  重力流;  关阀水锤;  调压塔
Keywords:
long-distance water transmission pipeline;  gravity flow;  valve closing water hammer;  surge tower
摘要:
长距离输水管线的一次性投资大，且管网重要程度高，做好水锤防护关系到用水的安全与稳定。以援非某重力流输水工程为例，管网全长57.6 km，地势两边高、中间低，且起伏较大，水锤削减存在较大难度。在确定管道最大允许承受压力、关阀时间、关阀方式后，针对危害较大的末端关阀水锤，通过布置进气阀、排气阀、调压塔、超压泄压阀等系列组合防护措施进行软件模拟与分析。结果表明：进气阀、排气阀的传统快进慢排布置并不具备普适性，应根据工程实际情况合理选择布置方法；进气阀、排气阀搭配调压塔能有效消除负压及断流弥合水锤引起的正压，进一步搭配超压泄压阀，可将水锤带来的危害降至管道承受范围内，为输水管线的安全运行提供保障。
Abstract:
For long-distance water transmission pipeline with large one-time investment and great importance, its water hammer protection measures are critical to the safety and stability of water supply. The length of a gravity flow water transmission project in Africa is 57.6 km，its terrain is high on both sides and low in the middle, which makes it difficult to reduce the water hammer. After determining the maximum allowable pressure, valve closing time and valve closing mode of the pipeline, a series of combined protective measures such as inlet valve, exhaust valve, surge tower and overpressure decompression valve were adopted to simulate and analyze the harmful water hammer caused by valve closing at the end of the pipeline. The results showed that, the traditional fast forward and slow exhaust arrangement of the inlet valve and exhaust valve was not universal, so the arrangement method should be reasonably selected according to the actual situation of the project. The combination of inlet valve, exhaust valve and surge tower could effectively eliminate the negative pressure and positive pressure caused by water hammer of cavities collapsing. When they were further combined with overpressure decompression valve, the harm caused by water hammer could be reduced to the bearing range of the pipeline, so as to guarantee the safe operation of the water transmission network.

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更新日期/Last Update: 2022-04-01