通过理论和解析方法讨论连接管较长时，其内水体惯性对调压井水锤压力和水位波动的影响。实例分析表明：连接管长度增加可使调压井水锤压力升高，水位波动幅值减小。
Based on analytical method, the paper shows that raising the length of a riser can elevate the water-hammer pressure and reduce the fluctuation of water level effectively in surge tank.
遇到需连接管道的长度比设计长度短的情况时，活动接头还可以起到延长管道的作用，使用效果好。
When the length of a pipeline needing to be connected is shorter than the designed length, the movable connector can play a role in prolonging the pipeline and has good use effect.
遇到需连接管道的长度比设计长度短的情况时，活动接头还可以起到延长管道的作用，使用效果好。
When the length of a pipeline needing to be connected is shorter than the designed length, the movable connector can play a role in prolonging the pipeline and has good use effect.
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