Butterfly valve with long service life

The utility model discloses a butterfly valve long in service life, and relates to the technical field of valves. A rotating groove is formed in the inner surface of the mounting seat; a rotating plate is mounted on the inner surface of the rotating groove; an upper rotating rod is mounted on the outer surface of the rotating plate; a fixed sleeve is mounted on the outer surface of the mounting block; positioning rods are mounted on the inner surfaces of the fixing sleeves, mounting plates are mounted on the outer surfaces of the mounting blocks, clamping grooves are formed in the inner surfaces of the mounting plates, and rubber sealing rings are arranged on the inner surfaces of the clamping grooves. The clamping groove is formed in the mounting plate, the rubber sealing ring is mounted in the clamping groove, then the pressing plate is mounted and fixed to the outer surface of the mounting plate through the mounting bolt, and therefore the rubber sealing ring is mounted and fixed, the rubber sealing ring c