长距离供水工程空气阀设置理论分析

Arrangement of air-valve for water hammer protection in long-distance pipelines

空气阀作为长距离有压供水工程重要的水锤防护措施,其合理布置涉及到工程运行安全。本文以水锤分析为基础,在满足管道最大允许负压设计标准的前提下,构建了空气阀布置的理论分析和数值优化框架,明确了空气阀设置位置、间距、数量与管道布置的关系,提出了不同工况下长距离供水管线中设置空气阀应满足的通用准则与相关公式。文中还结合某工程实例,通过数值仿真进行了空气阀布置方案的优化。

The rational arrangement of air valve in pipeline directly affects the safety of long-distance water-supply project for protection of water hammer.Based on the analysis on water hammer and to comply with the design standard of maximum allowable negative pressure in the process of operation,the general framework of theoretical analysis and numerical simulation on optimization of air valve are established in which the number of valve,locations and spacing intervals are explicated,and the principle of air valve setting under different conditions in long-distance water-supply project are proposed.The optimized arrangement of an example in engineering practice by means of numerical simulation is presented.