Industrial mechanical steel pipe positioning and welding device

The invention relates to the technical field of mechanical equipment, in particular to an industrial mechanical steel pipe positioning and welding device. The device comprises a workbench, trundles are fixedly connected to the lower ends of four supporting legs correspondingly, a top plate is fixedly connected to the upper ends of four supporting columns, a first screw rod is rotatably connected to the interior of a first empty groove through a bearing, a threaded block is in threaded connection with the outer side of the first screw rod, a connecting plate is fixedly connected to the upper end of the threaded block, a first through groove is formed in the middle of the connecting plate, a positioning device is rotatably connected to the interior of the first through groove through a bearing, a welding gun is fixedly connected to the lower end of the first hydraulic rod, and a protective shell is fixedly connected to the middle of the upper end of the workbench. The industrial mechanical steel pipe positionin