Automatic welding device for vertical supporting pipe of wind driven generator

The utility model relates to an automatic welding device for a vertical supporting pipe of a wind driven generator, which comprises a guide rail, a wheel supporting mechanism and a movable welding mechanism. The movable welding mechanism comprises a movable frame, a horizontal servo motor, a lead screw transmission mechanism, a first cantilever beam, a second cantilever beam and at least one automatic lifting welding trolley, the movable frame is driven by the horizontal servo motor and the lead screw transmission mechanism to horizontally move along the guide rail, and the first cantilever beam is fixedly installed on the movable frame. A second cantilever beam is horizontally installed on the lower portion of the first cantilever beam, and the automatic lifting welding trolley is installed on the second cantilever beam. The automatic welding device is scientific and reasonable in structural design, capable of automatically adjusting welding positions in the horizontal direction and the vertical direction, c