Repair welding device for valve casting

The utility model discloses a repair welding device for a valve casting, and belongs to the technical field of repair welding devices. Comprising a supporting plate, a rack is arranged on the upper side of the supporting plate, a valve body is arranged on the side, close to the rack, of the supporting plate, clamping blocks are arranged on the two sides of the valve body, a welding head is arranged above the valve body, and an electric push rod is arranged at the upper end of the welding head; the clamping driving assembly is arranged, the third motor drives the clamping blocks on the two sides of the valve body to move at the same time to clamp the valve body, cost is reduced, the clamping blocks on the two sides can move synchronously, operation is simplified, and clamping of the valve body is facilitated; according to the device, the position of the welding head can be adjusted during working, so that different positions on the valve body can be welded, the time for manually adjusting the welding position