| 引用本文: | 吴旭敏,马子恒,李高会,等.空气罐及空气阀联合水锤防护的应用[J].灌溉排水学报,2021,(8):93-98. |
| WU Xumin,MA Ziheng,LI Gaohui,et al.空气罐及空气阀联合水锤防护的应用[J].灌溉排水学报,2021,(8):93-98. |
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| 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。 |
| 关键词: 供水工程；水锤；空气罐；空气阀 |
| DOI：10.13522/j.cnki.ggps.2020665 |
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| Protective Design of Water Hammer for Pumping Stations |
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WU Xumin, MA Ziheng, LI Gaohui, ZHOU Tianchi, YANG Shaojia
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1. Powerchina Huadong Engineering Corporation, Hangzhou 311122, China; 2. Stecol Corporation, Tianjing 300384, China
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| Abstract: |
| 【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 1m 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. |
| Key words: water diversion project; water hammer; air tank; air valve |
