轻型井点降水变参数射流泵的设计

Design of the variable parameter ejector for well point dewatering engineering

轻型井点变参数射流泵的设计就是利用射流泵的原理和井点降水特点,采用双层喉管变面积比的设计,大面积比m适于降水初期,小面积比m适于降水中、后期,分级地改变面积比,提高降水过程的设备效率,加大轻型井点射流泵吸入真空度,来满足较深基坑的高效降水工程需要。

This paper presents a means of improving the efficiency and increasing the suction lift of ejector well\|point dewatering system. According to the optimal performance equation of ejector and the technology of well-point dewatering, two layers of throat tube is applied to the design of variable parameter ejector. It is easy to change the ratio of area using the different diameter throat tube. The unique outer tube (large area ratio) is suitable for initial duration of dewatering, the changeable inner tube (small area ratio) for lasting duration of dewatering.