通气立管管径对副通气立管排水系统通水能力的影响

Influence of Vent Pipe Diameter on Water Capacity of Drainage System with Auxiliary Vent Pipe

对副通气立管排水系统进行了不同通气立管管径(DN100、DN75、DN50)的对比试验,分别测定系统的最大通水能力,并观测了各个楼层的压力波动、水封损失、排水系统通气量变化。结果表明,通气立管管径越大,副通气立管排水系统的通水能力越强,3种管径下系统的最大排水流量分别为17.0、14.0、7.5 L/s,说明副通气立管排水系统具有较大的通水能力;当通气立管管径为DN75时,副通气立管排水系统就可以满足《建筑给水排水设计标准》(GB 50015—2019)中高层建筑最大排水流量10 L/s的要求。

The performance of drainage system with auxiliary vent pipe was compared under conditions of different vent pipe diameters(DN100,DN75 and DN50),the maximum water capacity of the system was measured respectively,and the pressure fluctuation,water seal loss and variation in ventilation of the drainage system were observed in each floor.Bigger diameter of the vent pipe would achieve greater water capacity of the drainage system with auxiliary vent pipe,in which the maximum flow rates of the three systems were 17.0 L/s,14.0 L/s and 7.5 L/s,respectively.The results indicated that the drainage system with auxiliary vent pipe had a large drainage capacity.When the diameter of the vent pipe was DN75,the drainage system with auxiliary vent pipe could meet the requirement of the maximum flow rate of 10 L/s for medium and high-rise buildings in the Standard for Design of Building Water Supply and Drainage(GB 50015-2019).