射流器轻型井点降水，是在真空泵轻型井点降水的基础上加以改进，用射流器取代了水气分离装置和真空泵，由离心泵、射流器和循环水箱组成的降水体系（见图）。工作原理为：水泵射流轻型井点降水抽水设备工作简图将水从水箱中吸出，通过管道及射流枪又喷回水箱，由于射流枪喷嘴 The light well point precipitation of the ejector was improved on the basis of the light well point dewatering of the vacuum pump, replacing the water and gas separation device and the vacuum pump with an ejector, and a precipitation system consisting of a centrifugal pump, an ejector, and a circulating water tank (see figure). The working principle is: pump jet light well point precipitation pumping equipment working schematic drawing water from the tank, through the pipeline and the jet gun and sprayed back to the tank, due to the jet nozzle