Automatic valve welding equipment

The invention relates to the technical field of valve welding, in particular to automatic valve welding equipment. The lifting device comprises a pair of lifting assemblies, a plurality of outer supporting components and a plurality of inner supporting components. The position of the outer wall protrusion is positioned in real time through the arranged outer supporting component, the protrusion thickness is measured through the moving distance, the position of the inner wall protrusion is positioned in real time through the inner supporting component, the protrusion thickness is measured through the moving distance, and meanwhile the eccentricity condition of the connecting pipe head is determined through the position changes of the outer supporting component and the inner supporting component at all the positions. Due to the fact that the area of the welding area is small at the moment, the dismounting work difficulty is low, the later dismounting workload is reduced, the cutting face is small in the remedia