Plunger pump stuffing box assembly detacher

A plunger pump stuffing box assembly detacher comprises a stuffing box assembly, a plunger pump body, a screw nail, a pressing bush and an ejector bush, wherein the stuffing box assembly is mounted inthe plunger pump body, the ejector bush is disposed in the plunger pump body and located at the upper end of the stuffing box assembly, the pressing bush is mounted at the upper end of the ejector bush, the screw nail is provided with male threads, the plunger pump body is equipped with a screw hole engaged with the male threads of the screw nail, and the screw nail penetrates through the pressing bush (2) and is screwed into the screw hole of the plunger pump body. When mounting, a plunger piston on the plunger pump is detached firstly so as to expose the screw hole of the plunger pump body,and then the screw nail, the pressing bush and the ejector bush are mounted sequentially. When using, the screw nail is tightened, the pressing bush presses the ejector bush, and the ejector bush ejects the stuffing box assem