摘要
研究高层建筑双立管排水系统在不同排水负荷下的气压波动情况,考察H管连接方式、专用通气管管径、排出横管设置和长排水等因素对系统运行的影响。结果表明,双立管排水系统中设置公称外径dn75专用通气立管,隔层采用dn75的H管与排水立管连接,底部采用2个45°弯头连接dn110的排出横管,排水负荷为7.8L/s时,排水立管内最大的负压波动约为-38mmH2O,底部正压约12mmH2O;H管连接方式改为每层连接或设置dn110的专用通气立管均会减小排水立管内的气压波动。排出横管在较短距离内打2个90°弯排出和系统中存在长排水时,排水立管内的负压波动几乎不受影响,但底部正压明显增大。
Fluctuation of air pressure of double stack drainage system of high-rise building was studied. The effect of the factors on system function were investigated, such as connection form of H pipe, specific vent stack size, outlet horizontal pipe and lasting discharge etc. The results showed that the maximum negative pressure was -38 mmH2O and the bottom positive pressure was 12 mmH2O, while the dn75 specific vent stack was set, and it was connected every two floors with discharge stack by H pipe, and at the bottom, connected with dn110 outlet horizontal pipe by two 1/8 bends. But the fluctuation of air pressure in the drainage stack would be reduced while connected every floor by H pipe or the dn110 specific vent stack was set. However, it didn＇t affect the fluctuation of air pressure of discharge stack, but increased the bottom positive pressure greatly that the outlet horizontal pipe turned two 1/4 bends in a short distance or there was lasting discharge.
出处
《给水排水》
CSCD
北大核心
2007年第5期69-75,共7页
Water & Wastewater Engineering
关键词
双立管排水系统
气压波动
专用通气立管
H管
排出横管
长排水
Double stack drainage system
Fluctuation of air pressure
Specific vent stack
H pipe
Outlet horizontal pipet Lasting discharge
