泵站系统管路负压的消除措施分析  

Elimination Measures of the Negative Pressure in Pump Station System

作　　者：石建杰[1] 邱象玉[1] 康军强[1] 

机构地区：[1]北京市水利规划设计研究院,北京100048

出　　处：《人民黄河》2016年第4期113-116,共4页Yellow River

摘　　要：泵站系统水泵启动、停机及事故断电过程中,管道局部高点位置会形成瞬时负压区,而负压区空气压力的剧烈变化是泵站系统断流弥合水锤形成的关键因素,在相应位置设置排气阀和气压罐是解决泵站负压引起的断流弥合水锤问题的有效措施。以尼日尔二期工程为例,基于Hammer软件,对泵站系统水锤进行了数值模拟计算。通过计算,比较了设置排气阀、气压罐以及气压罐和排气阀结合三种防护措施对管路系统负压的影响。结果表明,设置排气阀及气压罐措施能有效降低甚至消除管道负压,从而可预防断流弥合水锤的发生,是泵站系统水锤防护的有效措施。An instantaneous negative pressure zone will form when the pumps start, stop and power outages during the accident. It is a keyfactor for pumping systems water hammer of cavities collapsing with dramatic changes in the air pressure of the negative pressure zone. Inaddition, air valve and air pressure tank are set which is an effective measures to solve the water hammer of cavities collapsing by pumpstation negative pressure. In this paper, the stage II project in Niger was taken. The simulation was used for pumping water hammer byHammer software. The influences of three protective measures on piping system negative pressure were compared such as air valve, airpressure tank and air pressure tank with air vale. The results show that the measure to set air vale and air pressure tank can effectively reduceor even eliminate the pipe negative pressure. Finally, the water hammer of cavities collapsing can be prevented. So, it is an effective measureto hammer protection of pump station system.

关 键 词：排气阀 气压罐 断流弥合水锤 泵站系统 

分 类 号：TV134.1[水利工程—水力学及河流动力学] TV136.2