Automatic hydraulic reversing device

The invention relates to the technical field of maintenance and repair of nuclear power plant equipment, in particular to an automatic hydraulic reversing device and aims at solving the problems that swinging of a nozzle of an existing sludge washing gun needs to be driven by a motor, the reliability is poor, the motor needs to be replaced frequently, and work objects are prone to being polluted. The automatic hydraulic reversing device is characterized in that the reversing device comprises an automatic reversing valve, a reciprocating hydraulic cylinder, a valve body, second one-way valves, throttle valves, first one-way valves, a nozzle assembly and a transfer body; the automatic reversing valve and the reciprocating hydraulic cylinder are installed inside the valve body, and the reciprocating hydraulic cylinder is located on the right side of the automatic reversing valve; the second one-way valves, the throttle valves and the first one-way valves are all located inside the valve body; the transfer body is installed at the back end of the valve body; and the nozzle assembly is installed at the front end of the valve body. According to the automatic hydraulic reversing device, the situation that the reciprocating hydraulic cylinder can be controlled to be automatically reversed and a piston of the reciprocating hydraulic cylinder can be pushed to move only by relying on high pressure water and without the help of any other media, power and control signals can be achieved through the hydrodynamic automatic reversing valve and the two pairs of one-way valves.