Steel pipe plasma cutting machine

The utility model relates to the technical field of cutting machines, in particular to a plasma cutting machine for a steel pipe. Steel pipes of various diameters can be cut at equal intervals, adaptability is good, and cutting efficiency is improved. Comprising a workbench, a lifting rotation driving mechanism, a lifting conveying mechanism, a mounting frame, a threaded rod, a square rod and a plasma cutting head, a mounting groove is formed in the right portion of the workbench, the lifting rotation driving mechanism is arranged in the mounting groove, the mounting groove is in a Y-shaped opening shape, and the lifting rotation driving mechanism comprises two first hydraulic cylinders, a first lifting plate, a rotating roller and a gear motor; the two first hydraulic cylinders are fixedly mounted on the inner bottom wall of the mounting groove, the lifting conveying mechanism comprises two second hydraulic cylinders, a second lifting plate, a conveying roller and a servo motor, a V-shaped ring groove corres