提高S型存水弯水封保持能力的影响因素研究

Study on Influence Factors of Improving Water Seal Maintenance Ability in S-shaped Trap

在34层高度的试验塔上,采用定流量排水装置排水,考察在不同影响因素下S型存水弯内的水封高度变化及水封损失情况,探究其抵抗排水管道内负压波动的水封保持能力。结果表明:定流量排水120 s时S型存水弯水封高度损失最大,存水弯下肢端管径为80 mm时水封高度损失最小,存水弯下肢端与水平方向夹角为90°时水封高度损失最小。在排水的中后期水封液面波动幅度最大,导致负压抽吸的水封损失最多。

The drainage device with constant flow was used to drain away water from a 34-floor tower. The change of water seal height and water loss in the S-shaped trap under different influencing fac- tors were investigated, and the water seal maintenance ability to resist the negative pressure fluctuation in the drainage pipe was explored. The results showed that the water seal height loss was maximum when the drainage with constant flow was lasted for 120 s, and the water seal height loss was minimum when the pipe diameter of the trap＇ s lower limb was 80 mm or the angle between trap＇ s lower limb and the hori- zontal direction was 90°. The liquid level fluctuation of water seal was maximum during the mid-late period of drainage, which could lead to the maximum water seal loss caused by negative pressure suction.