Self-cleaning pump system for transporting grout

The utility model discloses a self-cleaning pump system for transporting grout and belongs to the field of the construction technology. The self-cleaning pump system comprises a machine frame, a grout box, a mixer, a rotor pump, a motor and a cleaning water tank, wherein a grout outlet pipe, which is arranged at the lower part of the grout box, is connected with the rotor pump through a grout outlet valve and a grout outlet tee joint; the outlet of the rotor pump is communicated with the grout return hole of the grout box through a pump tee joint, a grout carrying pipe, a grout carrying tee joint and a grout return valve; the branches of both the grout outlet tee joint and the pump tee joint are connected with the cleaning water tank through respective pipes; the branch of the grout transport tee joint is connected to a grout transport pipe through a grout carrying valve; an emptying valve is arranged at the lower part of the side surface of the grout box; a grout feeding hole is formed in a grout box lid; and a water feeding hole is formed in a cleaning water tank lid. The self-cleaning pump system integrates the transport pump function and the cleaning function, is compact in structure and flexile to operate, can effectively prevent the grout from blocking the pipes, runs reliably, and not only can transport distorted concrete grout but also can clean the pipes and the valves.