90-degree elbow pipe inner wall surfacing displacement device

The utility model discloses a 90-degree elbow inner wall surfacing displacement device which comprises a bottom plate, the top of the bottom plate is rotatably connected with a rotating shaft, the outer side of the rotating shaft is provided with a lifting groove, the interior of the lifting groove is slidably connected with a lifting rod, the interior of the lifting rod is provided with a limiting groove, and the interior of the limiting groove is fixedly connected with a limiting rod. Limiting blocks are slidably connected to the outer sides of the limiting rods; the elbow pipe fixing device has the advantages that the fixing rod, the clamping block, the first lead screw and the sliding block are arranged, so that the elbow pipe fixing function is achieved; a rotating shaft, a lifting rod, a connecting base, a second lead screw, a limiting block and a limiting rod are arranged, so that the welding gun adjusting function is achieved; and by arranging the connecting base, the fixed base, the rotating base and