本发明是将伸缩水管(3)用密封垫(7)和锁紧螺母(2)在排水管(1)和水箱(4)之间连接锁紧,防止漏水。伸缩水管上口套有三爪压板(6)与控制拉绳(5)相连。不工作时,伸缩管受水浮力和自身弹力作用水口始终高出水面。需冲水时,拽紧拉绳,伸缩管被压缩,水口沉入水中,水即从管口进入排水管,排出冲洗。冲毕松开拉绳,伸缩管弹回原状,冲水停止。这种排水装置不存在直落 The invention is that the expansion and contraction water pipe (3) is tightly connected between the drainage pipe (1) and the water tank (4) with a gasket (7) and a lock nut (2) to prevent water leakage. The three-claw pressure plate (6) is connected to the control pull line (5). When not working, the telescopic tube is always higher than the water surface by the water buoyancy and its own elastic force. When flushing is needed, tighten the drawstring, the telescopic tube is compressed, the nozzle sinks into the water, and the water enters the drain from the nozzle and drains. After loosening the pull cord, the telescopic tube springs back to its original shape and flushing stops. This drainage device does not have a straight drop