| Cite this article: | 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,0,():-. |
| 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,0,():-. |
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| DOI： |
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| Protective Design of Water Hammer |
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Wu Xumin1, Ma Ziheng2, Li Gaohui1, Zhou Tianchi1, Yang Shaojia1
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1.POWERCHINA HUADONG ENGINEERING CORPORATION;2.STECOL CORPORATION
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| Abstract: |
| Abstract: 【Background】Water resources in various countries are usually unevenly distributed in time and space, such as flooding in South and drought in North Of China, rainy in north of California, dry in south of The United States, water shortage in the Australian inland, and rainy in the dry west and east of Peru Water conveyance project is one of the most effective means to solve the uneven distribution of water resources.【Objective】The purpose of this paper is to explore the application of air tank and air valve combined waterproof hammer protection in long distance high lift water supply engineering.【Method】This paper combines a water supply project. The air tank node control conditions and the air valve boundary conditions were established. Based on the characteristic line method, the calculation model of the pump station and the pipeline section behind the pump was established by HysimCity, a water hammer simulation software for long-distance water conveyance project. The simulation calculation of hydraulic transition process under various working conditions was carried out. This paper compares and analyzes the influence of no protective measures, air tank and air valve combined protection on water hammer of stop pump, and optimizes the parameters of air tank.【Result】For control conditions, combined protection of air tank and air valve is adopted. When the water pump is cut off, the rear pressure of the pump is always greater than 0m, and the lowest water level of the air tank exceeds the bottom elevation of the air tank to meet the requirement of no less than 1m.Ps1-ps2 pipeline pressure should meet the requirement of not less than -5m;The pipeline pressure of PS1-PS2 should not exceed 200m.【Conclusion】The combined protection of air tank and air valve is beneficial to restrain the influence of positive and negative water hammer, and the combined protection effect is good. |
| Key words: water diversion works; water hammer; air tank; air valve |
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