Angle-adjustable carbon arc gouging gun

A gun head is connected with an air valve through an angle adjusting connector, the gun head is provided with a three-way copper pipe, an upper connector of the three-way copper pipe is in threaded connection with an insulating nut, a lower connector of the three-way copper pipe is in threaded connection with an insulating connector, and a carbon rod clamping sleeve is embedded in the insulating connector. A main body of the air valve is a four-way copper pipe, a conical valve body is embedded from the upper portion of the four-way copper pipe and can rotate in the four-way copper pipe, an air vent is formed in the valve body wall of the conical valve body and coincides with a transverse connector of the four-way copper pipe, a round pad is embedded into the lower portion of the four-way copper pipe, and one transverse connector of the four-way copper pipe is connected with an angle adjusting connector. And the other transverse interface is connected with the handle. A gouging copper pipe arranged on the hand