Moving trolley hopper welding tool

The utility model belongs to the technical field of car hopper production equipment, and particularly relates to a movable car hopper welding tool. The turnover device comprises a turnover mechanism, a positioning support, a positioning assembly and a clamping assembly. The two positioning supports are connected to the turnover mechanism in a sliding mode and used for bearing the car hopper, each positioning support comprises a sliding base, an outer support and inner supporting frames, the outer supports and the inner supporting frames are installed on the sliding base, the sliding bases are connected to the turnover mechanism in a sliding mode, the two oppositely-arranged inner supporting frames are used for supporting the inner side of the car hopper, and the two outer supports located on the outer side are oppositely arranged; the positioning assembly is fixed to the sliding base and used for limiting the edge of the opening of the car hopper. The clamping assembly is installed on the outer support, and t