The working principle ofdrillingpumpsandpumping vessel:work,motorthrough the belt,reducer,gear reducer drives the impeller torotate slowly,the sandwiththe feed chute into the washing groove,rolling in theimpellerdrive,and mutual grinding,remove the gravel covered surface impurities,anddestructionof water vapor coated layer of sand,with theat the same timetodehydration;water,formingstrong currents,in thesmall proportion of the impurities and foreignaway,andfrom the overflow outlet washing tank discharge,theefficient pumpingsandinto thecleaningeffect.Clean gravel from the leaves away,finallyinto sandtroughfrom the rotation of the impeller,complete sand cleaning effect.