Pilot-operated type stop unloading valve for hydraulic support

The utility model provides a pilot-operated type cut-off unloading valve for a hydraulic support, which comprises a main pipeline liquid inlet one-way valve, a ball valve assembly, a rotating shaft assembly, a main pipeline unloading one-way valve and a pilot-operated cavity unloading one-way valve, and the main pipeline liquid inlet one-way valve is provided with a pilot-operated cavity used for containing pilot-operated cavity high-pressure liquid; the ball valve assembly is used for controlling on-off of high-pressure liquid in the pilot cavity. The main pipeline liquid inlet one-way valve is used for controlling the on-off of the main pipeline under the action of high-pressure liquid of the pilot cavity; the ball valve assembly and the rotating shaft assembly are in linkage and used for controlling liquid inlet opening and closing of the pilot cavity and alternate opening and closing of the pilot cavity unloading one-way valve and the main pipeline unloading one-way valve. The pilot cavity unloading one-w