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在长距离输水管线中,当事故停泵时,管路会产生负压,甚至出现汽化和液注分离,如果不采取合理的防护措施会导致管线的破坏。根据气液两相水锤计算模型,结合某长距离输水工程水力过渡过程数值模拟计算,利用空气阀和单向调压塔联合作用,并配合泵后阀门2阶段关闭的防护技术,有效地控制了管线的水锤压力。
In long-distance water pipelines, when the pump is stopped due to an accident, the pipeline will generate negative pressure, and vaporization and liquid separation may even occur. If no reasonable protective measures are taken, the pipeline will be damaged. According to the calculation model of gas-liquid two-phase water hammer and the numerical simulation of hydraulic transition process of a long-distance water conveyance project, the air valve and the unidirectional pressure regulating tower are used in combination to cooperate with the two-stage shut-off protection technology of the pump valve to effectively Controls the water hammer pressure on the line.