QDX single-phase submerged pump(hereafter refersto as electric pump),by the water pump,the seal,the electric motor three parts is composed.In the electric pump matches the protective device,electric motor located at electric pump on,for single-phase or three-phase asynchronous motor,water pump located at electric motor lower part,is the centrifugal-type impeller,the whorl shell structure,Between the pump housing and the electric motor uses the double-end surface mechanical seal,each solid stops the mouth seal place use "O"the shape oil resietant rubber seal packing collar to make the static seal surely.Because this pump the volume is samll,the weight is light,is suitable the general countryside mine shaft to pull out specially the water,the farmland irrigation and drainage,the botanical garden irrigation,the family life water used,may also use in removing the industry water,the building construction to give situations and so on draining water and cultivation.