ZHAO Xing-ming,ZHAO Xing-zhong,WANG Zhen-guo,et al. Water Hammer Protection of Water Supply Pipeline and Its Optimization in High Mountain Scenic Area with Large Height Difference [J].China Water & Wastewater,2020,36(13):38-43.
Water Hammer Protection of Water Supply Pipeline and Its Optimization in High Mountain Scenic Area with Large Height Difference
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
13
Page:
38-43
Column:
Date of publication:
2020-07-01
- Keywords:
- high mountain scenic area; water supply pipeline with large height difference; water hammer protection; closing valve in two stages; compound air valve
- Abstract:
-
Water supply pipeline in high mountain scenic area has the characteristics of large height difference, great fluctuation at the ends and easy occurrence of cavities collapsing water hammer due to power loss and shutdown of pumps. To solve these problems, feasible protective measures of water hammer were explored. Hydraulic control butterfly valve was firstly installed at the outlet of the pump, and the closing time and the closing degree in two stages were optimized by orthogonal experiment. At the same time, a compound air valve was set at high position of the pipeline to simulate the instantaneous hydraulic process. When the inflow and outflow apertures were 15 mm and 5 mm respectively, the positive pressure of the water hammer was reduced by 158.98 mH2O, the maximum negative pressure of the highest point of the pipeline was -57.0 kPa, and the air volume was minimized. The best protective effect was obtained by reasonably arranging the position of the compound air valve and only setting three air valves. After the optimization, 20# seamless steel pipe with a wall thickness of 4.5 mm could bear the water hammer pressure generated by the water supply pipeline with a height difference of 262 m.
Last Update:
2020-07-01