Jig for machining emptying valve

The utility model relates to the technical field of emptying valve machining, in particular to a jig for emptying valve machining, which comprises a concave seat, a mounting part is arranged on the outer wall of the concave seat, two symmetrical connecting plates are mounted above the concave seat through a transmission mechanism, and positioning mechanisms are arranged at the corresponding ends of the two connecting plates. The positioning mechanism comprises an arc-shaped plate and a connecting rod, and the outer wall of the arc-shaped plate is fixedly connected to the edge of the rear portion of the side wall of the connecting plate. The jig has the advantages that the jig can stably position the emptying valve according to the structure of the emptying valve, front-back, left-right movement, axial movement and vertical movement of the emptying valve can be all limited, and the jig is convenient to use and high in practicability. The discharging valve can be firmly fixed and is very stable, when a worker g