The invention discloses an adjustable jet pump which comprises a pump body, two baffles form a conversion cavity in the pump body, an arc-shaped base is arranged on the inner wall of the bottom of the conversion cavity, an annular
toothed belt is arranged on the outer circumferential wall of a rotating wheel in the circumferential direction of the rotating wheel, and a driving gear is arranged at the output end of a driving motor. A plurality of columnar movable cavities are formed in the end face of the rotating wheel in the axial direction of the rotating wheel, a
butt joint assembly is arranged in each movable cavity, a through hole is formed in the side wall, right facing the
throat, of the conversion cavity, a sealing ring is arranged on the inner wall of the through hole, a
butt joint hole is formed in the side wall, back to the
throat, of the conversion cavity, and a
butt joint ring is arranged on the inner wall of the conversion cavity. An execution
assembly is arranged in the middle of the rotating wheel. On the premise that the pump body is not disassembled, one of the multiple butt joint assemblies on the rotating wheel is selected to be suitable for the
nozzle and the distance between the
nozzle and the
throat, meanwhile, communication between the inlet section of the pump body and the
mixing chamber is achieved, the sealing grade after butt joint is guaranteed, and the purpose of replacing the
nozzle in real time is achieved.