| 摘要: |
| 【目的】探讨空气罐在高原山区复杂地形条件下高扬程泵站水锤防护中的应用效果。【方法】本文结合云南省某供水工程，基于特征线法建立泵站系统计算模型，进行了多种工况下水力过渡过程仿真计算，对比分析了止回阀拒动无防护、止回阀与防水锤型空气阀联合防护、止回阀与设置在不同位置的空气罐联合防护等工况下水锤防护措施的效果，探讨空气罐对高原山区复杂地形条件下高扬程泵站负水锤防护效果。【结果】在管线后段设置空气罐与水泵出口速闭止回阀联合防护，可使事故停泵下水泵不倒转，沿线无负压，最高升压比1.2倍，满足《泵站设计规范》要求。【结论】在高原山区复杂地形条件下高扬程泵站中将空气罐设置在负水锤源头或较上游位置，可从根本上防护弥合水锤。 |
| 关键词: 高扬程泵站；复杂地形；空气罐；弥合水锤；负水锤防护措施 |
| DOI： |
| 分类号:TV68 |
| 基金项目:国家十四五重点研发计划(No.2021YFC300205-06)；云南省高层次人才及创新团队(No.2018HC024) |
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| Application of Air Tank in Water Hammer Protection of High Head Pumping Station under Complex Terrain Condition in Plateau Mountainous Area |
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lilingling1,2, gushixiang1,2
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1.Yunnan Institute of Water &2.Hydropower Engineering Investigation, Design and Research
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| Abstract: |
| 【Objective】 To explore the application effect of air tank in water hammer protection of high-lift pumping station under complex terrain conditions in plateau mountainous areas. 【Method】 Combined with a water supply project in Yunnan Province, the calculation model of the pumping station system was established based on the characteristic line method, and the simulation calculation of the hydraulic transition process under various working conditions was carried out. The effects of water hammer protection measures were compared and analyzed under the working conditions of no protection of check valve refusing to operate, joint protection of check valve and waterproof hammer air valve, and joint protection of check valve and air tank set at different positions. The protective effect of air tank on negative water hammer of high-lift pumping station under complex terrain conditions in plateau mountainous areas was discussed. 【Result】 The joint protection of air tank and pump outlet quick-closing check valve in the back section of the pipeline can prevent the pump from reversing under the accident shutdown, and there is no negative pressure along the line, and the maximum pressure rise ratio is 1.2 times, which meets the requirements of Design Code for Pumping Station. 【Conclusion】 Under the complex terrain conditions in plateau mountainous areas, the air tank in the high-lift pumping station is set at the source or upstream of the negative water hammer, which can fundamentally protect the water hammer. |
| Key words: high-lift pump station; complex terrain; air tank; water hammer of cavities collapsing; negative water hammer protection measures |
