High-reliability plasma tapping device for pipeline

The invention relates to a high-reliability plasma tapping device for a pipeline. The high-reliability plasma tapping device for the pipeline comprises a holder assembly, a swing arm assembly, a sliding rail assembly and a cutting assembly, wherein the holder assembly comprises a holder supporting disc, a hollow rotary table and a rotary table; the swing arm assembly comprises a swing arm and a support plate; the swing arm is horizontally fixed onto the rotary table; the support plate is perpendicularly fixed onto the swing arm; the sliding rail assembly is vertically installed on the supportplate; the cutting assembly comprises an adapter base connected with the sliding rail assembly; a plasma cutting gun is fixed to the middle of the adapter base; a laser range finder is arranged on oneside of the plasma cutting gun; a camera or an infrared range finder is arranged on the other side of the plasma cutting gun; and the perpendicular distances between the plasma cutting gun and the axis of the hollow rotary ta