| This article has been：Browse 126Times Download 103Times |
scan it! |
|
|
| DOI：10.13522/j.cnki.ggps.2022288 |
|
| Application of Air Tank in Water Hammer Protection of High Head Pumping Station under Complex Terrain Condition in Plateau Mountainous Area |
|
LI Lingling, TONG Baolin, LIU Zhiyong, GU Shixiang
|
|
1. Yunnan Institute of Water & Hydropower Engineering Investigation, Design and Research, Kunming 650051, China;
2. Wuhan University, Wuhan 430072, China
|
| 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 |
|
|
