The invention relates to the technical field of quick-closing valves, and discloses a sleeve quick-closing valve which comprises a
valve seat, a mounting block, a valve element and a fixing block. A sleeve is installed on the upper surface of the
valve seat, an adjusting rod is screwed to the upper surface of the sleeve, and a lifting block is arranged at the bottom end of the adjusting rod. The mounting block is arranged at the bottom of the lifting block, a limiting rod is inserted into an inner cavity of the mounting block, a
piston is mounted at the bottom end of the limiting rod, and a first spring is arranged between the
piston and the mounting block; limiting strips are mounted on the two sides of the surface of the limiting rod, and limiting grooves are formed in the corresponding positions of an inner cavity of the mounting block. Mounting cylinders are uniformly distributed on the surfaces of the fixing blocks, second springs are mounted on the surfaces of the mounting cylinders, and
extrusion plates are mounted at the output ends of the second springs. Through cooperation of all the structures, precise
butt joint and separation of the valve element and the
valve seat are achieved, movement stability and sealing reliability are guaranteed, opening and closing response efficiency is optimized,
impact force is buffered, abrasion is reduced, the service life is prolonged, and operation stability and use reliability are improved.