Girth welding device

The utility model discloses a girth welding device. The girth welding device comprises a workbench, a limiting assembly, a supporting frame, a lifting assembly, an adjusting assembly and a welding gun, wherein the limiting assembly and the supporting frame are arranged on the workbench, the lifting assembly is located on the supporting frame, the adjusting assembly is connected with the lifting assembly, and the welding gun is arranged on the adjusting assembly. The limiting assembly comprises a rotating mechanism fixedly installed on the workbench, a clamping jaw arranged on the rotating mechanism, a set of first limiting blocks symmetrically arranged on the side, facing a clamped object, of the clamping jaw, and a second limiting block arranged on the side, back to the clamped object, of the clamping jaw. The device can clamp a rigid workpiece or a workpiece easy to deform, so that failure of girth welding work caused by deformation of the workpiece in the clamping process is avoided, and smooth proceeding