Hydraulic quick dismounting device for cylinder sleeve

The utility model belongs to the technical field of diaphragm pumps, and particularly relates to a hydraulic quick dismounting device for a cylinder sleeve. The device comprises a positioning clamp, a piston subassembly and a hanging bracket, the positioning clamp comprises two semicircular clamps, protrusions matched with grooves in the rear end of a cylinder sleeve are arranged on the inner sides of the semicircular clamps, the piston subassembly comprises a hydraulic cylinder sleeve, a piston, a vent hole, an oil inlet hole and other structures, and a bolt hole used for being connected with the piston subassembly is formed in the hanging bracket. When the device is used, the positioning hoop is fixed to the rear end of the cylinder sleeve, the piston subassembly is connected with the hanging bracket, the hanging bracket is connected with the crown block, the hanging bracket and the piston subassembly are integrally hung to the two sides of the positioning hoop through the crown block, the piston subassembl