重力流输水管道关阀水锤模拟研究

发布时间：2018-05-14 02:38

本文选题：重力流 + 水锤　；参考：《水利水电技术》2017年05期

【摘要】：确定重力流输水管道最合理的关阀时间需要考虑如下因素:一是管道的水锤压力不要过高,防止管道破裂;二是水锤压力不要过低,严禁管道沿线出现断流弥合水锤,防止出现负压压瘪管道;三是要有利于操作方便、保护设备。以北京市某南水北调配套工程为例,选择HAMMER软件模拟管道瞬变流,分析重力流输水管道关阀过程中的水锤现象。结果表明:关阀时间越长,管道最大压力越小,最小压力越大,水流条件越好。蝶阀关闭时间为50 s时管道最大压力达169.27 m,关闭时间为500 s时管道最大压力为65.18 m。在线性关阀时间不小于200 s时,管道沿线不产生负压,且最大压力小于管道的设计压力。综合考虑保护管道、操作方便、便于管理、保护设备等因素,确定蝶阀线性关闭时间为300 s。研究成果对重力流输水管道阀门管理和保护具有参考价值。
[Abstract]:The following factors need to be considered in determining the most reasonable closing time of gravity water conveyance pipeline: first, the water hammer pressure of the pipeline should not be too high to prevent the pipeline from breaking down; second, the water hammer pressure should not be too low, and it is strictly prohibited to break down and close the water hammer along the pipeline. To prevent the emergence of negative pressure pipe; third, to facilitate operation, protection equipment. Taking a matching project of South-to-North Water transfer in Beijing as an example, this paper selects HAMMER software to simulate the transient flow of pipeline, and analyzes the water hammer phenomenon in the process of closing valve in gravity water conveyance pipeline. The results show that the longer the valve is closed, the smaller the maximum pressure is and the greater the minimum pressure is, and the better the flow condition is. The maximum pressure of the pipeline is 169.27 m when the closing time of butterfly valve is 50 s and the maximum pressure is 65.18 m when the closing time is 500s. When the linear valve closing time is not less than 200 s, there is no negative pressure along the pipeline, and the maximum pressure is less than the design pressure of the pipeline. The linear closing time of butterfly valve is determined to be 300 s. The research results have reference value for valve management and protection of gravity water conveyance pipeline.
【作者单位】：北京市水利规划设计研究院;
【基金】：基金项目:南水北调来水调入密云水库调蓄工程(NSBD-PT-MYTX-KS)
【分类号】：TV134;TV672.2

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