基于压力试验方法的长输管道水击泄放量计算

介绍了氮气式水击泄压阀的工作原理以及基于泄压阀流量系数泄放能力的计算方法,分析了采用目前常用方法计算的泄放量远大于实际泄放量的原因,探讨了根据工艺管网压力试验方法的原理.采用流体密闭长输管道发生水击时进行水击保护泄放量的近似计算方法的结果优于目前常用方法的计算结果,可为正确选择泄压阀的规格与合理设计泄放罐提供依据,并在一定程度上保证对生产中发生的水击事故进行超前保护和有效控制设计目的的实现,避免设备、设施损坏.（表2,参5）

Calculation of surge release volume in long-distance pipeline based on pressure test method

The paper elaborates the work principles of nitrogen-style surge release valve and release volume calculation method based on the flow coefficient of pressure release valve, and analyzes the reasons why release volume calculated with the current method is much higher than the actual release volume. The principles of release volume calculation method based on the pipeline pressure test is analyzed, and an approximate method used in the release volume calculation of water hammer protection when water hammer occurs in a tight line transportation pipeline is developed, the results of the approximate method are more accurate than that calculated by the commonly used method, providing a basis to the correct selection of release valve sizes and appropriate pressure release tank design, and ensuring the lead protection and effective control when water hammer accidents occur, avoiding damage to equipment and facilities. （2 Tables, 5 References）