环形通气管对S型存水弯水封保护的数值模拟

Numerical simulation of water seal protection for s-shaped trap by loop vent

采用数值模拟方法,模拟分析了环形通气管的设置位置和管径对室内排水系统横支管中S型存水弯的水封保护作用。模拟结果表明,当排水条件相同时,环形通气管设置于末端两个卫生器具中间更有利于S型存水弯水封保护;环形通气管管径并不是越大越好。

Water seal is the most commonly used way to isolate drainage pipes and indoor environment at present.In this paper,using computational fluid dynamics CFD software research location of annular ventilation tube and pipe diameter for drainage system on the horizontal branch of s-shaped trap water seal protection and the effect of using numerical simulation method,through simulating four kinds of drainage discharge current state of the model,the simulation results show that when horizontal tube is not yet set loop vent,pipe pressure fluctuation is bigger,the end of the trap water seal water to about 3 S basic all losses.When the loop vent is set between the two sanitary devices at the end of the transverse pipe,the water seal of the s-shaped water trap at the end only shows a slight loss.That is to say,with the same drainage conditions,the loop vent installed on the transverse branch pipe of drainage plays a certain role in water seal protection.At the same time,the diameter of the loop vent is not the larger the better.When the annular loop vent is moved to the position close to the end trap,the water seal of the end s-shaped trap shows a certain degree of loss around 3s,indicating that the setting position of the loop vent will have different effects and effects on the water seal protection.