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针对Z市市区供水紧张,而南水北调中线工程通水后航空港区一水厂供水能力有富裕的现状,分析了利用原港区供水工程回供市区的可行性,并利用水锤瞬态分析软件,通过建立航空港区—市区供水水锤模型,对该管道上各阀门不同关阀历时的水锤进行分析计算。结果表明,关阀持续时间与管道压力波动幅度关系明显,关阀持续时间10min以上,相较持续1min,阀前正压平均降低49.88%,阀后负压平均降低66.05%,持续时间20min,正压平均降低57.70%。通过设定合理关阀时间,可有效降低水锤对管道的破坏。
In view of the shortage of water supply in downtown Z and the feasibility of using the original port water supply project to supply the urban water supply area after the water diversion from the mid-route of the South-to-North Water Diversion Project is abundant, the water hammer transient analysis Software, through the establishment of airport water supply - urban water hammer model, the valve on the pipeline of different valves for the duration of the water hammer analysis and calculation. The results showed that the relationship between the duration of closing valve and the fluctuation of pipeline pressure was obvious. The valve closing duration was more than 10 minutes, compared with the duration of 1 minute, the positive pressure before valve reduced 49.88% on average, and the negative pressure after valve decreased 66.05% on average, the duration was 20 minutes The average pressure decreased 57.70%. By setting a reasonable closing time, water hammer can effectively reduce the pipeline damage.