Automatic alignment welding device for tubular pile

The utility model relates to the technical field of building pile foundations, and discloses an automatic alignment welding device for tubular piles, which comprises a base provided with a rotating disc. The first lifting part is arranged on one side of the rotating disc, a welding gun is arranged at the top of the first lifting part, and the first lifting part is driven by a second driving mechanism arranged in the base; the second lifting part is arranged on the other side, opposite to the first lifting part, of the rotating disc, a rotating shaft is arranged at the top of the second lifting part, the rotating shaft is sleeved with two semicircular lantern rings, the lantern rings can be opened or closed with the rotating shaft as the center, and the lantern rings are closed at the joint of the upper pipe pile and the lower pipe pile; the inner diameter of the two closed lantern rings is matched with the diameter of the pipe pile, the second lifting part is driven by a third driving mechanism, and the third