Valve rod filler replacing device

The utility model belongs to the technical field of fluid transportation, and particularly relates to a valve rod filler replacing device. A valve rod mounting hole (105), two threaded holes (103) and(104) and a protruding part (500) are arranged on a center frame (100), wherein the valve rod mounting hole (105) and the two threaded holes (103) and (104) penetrate through the center frame (100),and the protruding part (500) comprises a mounting hole (501) and an opening (502) which are communicated. Two screw rods (200) and (300) are respectively inserted into the two threaded holes (103) and (104); when the valve rod filler is replaced; the valve rod is inserted into the valve rod mounting hole (105); the two lead screws (200) and (300) are placed on the end faces of the valve stuffingbox respectively, so that the special screwdriver (400) taps the self-tapping screw (600) into the valve rod stuffing through the opening (502) and the mounting hole (501), and the stuffing can be taken out by rotating the two