塑料排水立管通水能力探讨

Discussion on Drainage Ability of Plastic Run-Off Standpipe

通过对水膜流状态下的流速与能量方程、充水率及空气压差的分析,认为在终限流速相等的条件下,塑料管排水的能力比同管径铸铁管小。且塑料排水立管通水能力应从管内压力波动及空气压差两方面综合考虑。

It is believed through analyses of the equation of flow rate and energy of water in the state of waterfilm flow,water fullness and air pressure difference in the pipe that under the condition of same terminal velocity the drainage ability of a plastic pipe is lower than that of a cast iron pipe of the same diameter and that the drainage ability of plastic run off standpipe should be considered in a comprehensive way by taking into account the fluctuation of pressure and the difference of air pressure inside the pipe.