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阀门的过流特性以及水击压力控制是输水管道优化运行的关键技术之一。为了确定复杂阀门系统的流量系数并控制阀门在关闭过程中产生的水击压力,运用有压管流的基本原理推导出阀门系统的综合流量系数计算公式,并以流量系数的变化过程来评估管路中产生的最大水击压力。结果表明,压力管路中产生的最大水击压力与流量系数的变化规律直接相关,对于同样的管路控制工况,流量系数的变化过程越平缓,所产生的水击压力越小。
Valve overcurrent characteristics and water hammer pressure control is one of the key technologies for the optimal operation of water pipelines. In order to determine the flow coefficient of complex valve system and control the water hammer pressure generated during the closing process of the valve, the formula of the integrated flow coefficient of the valve system is deduced by using the principle of pressurized pipe flow, and the change of flow coefficient is used to evaluate the pipe The maximum water hammer pressure generated in the road. The results show that the maximum water hammer pressure generated in the pressure pipeline is directly related to the variation of the flow coefficient, and the more gentle the change of the flow coefficient is, the smaller the water hammer pressure is generated for the same pipeline control conditions.