Spiral steel pipe submerged arc welding machine

The invention discloses a spiral steel pipe submerged arc welding machine, and relates to the technical field of submerged arc welding machines, the spiral steel pipe submerged arc welding machine comprises a moving trolley, an electric push rod, a vertical rod, a rectangular vertical column, a fixed seat, a welding gun body and a second electric push rod, the output end of the second electric push rod is fixedly connected with the fixed seat, and a base is arranged on one side of the moving trolley; a spiral steel pipe is placed at the top end of the base, and limiting mechanisms are arranged on the two sides of the fixing base. By arranging the limiting mechanism, a U-shaped connecting block can be driven by output of a hydraulic cylinder to drive a pushing wheel to move downwards through a rectangular block, so that a swinging rod is pushed to drive one end of a torsional spring to rotate through a rotating shaft, and an L-shaped limiting block drives auxiliary wheels to move towards the outer wall of the