Low-power non-high-frequency plasma cutting gun

The utility model relates to the technical field of plasma cutting guns, in particular to a low-power non-high-frequency plasma cutting gun which comprises an electrode, a nozzle, a gun body shell and a protective sleeve which are sequentially sleeved from inside to outside, the electrode is arranged in the nozzle in a sliding mode, an electrode base is fixed to the end of the electrode in a threaded mode, and an air cylinder is sleeved outside the electrode base. The electrode base is arranged in the air cylinder in a sliding mode, the air cylinder is sleeved with an insulating lining, the insulating lining is provided with an inclined hole, the inclined hole is obliquely formed in the direction facing the electrode, the insulating lining is sleeved with one end of the gun body shell, the other end of the gun body shell is in threaded connection with the nozzle, and a gap is reserved between the end face of the insulating lining and the end face of the nozzle; the nozzle which easily generates high temperatu