Argon conveying protection device of manual argon tungsten-arc welding

The utility model discloses an argon conveying protection device of a manual argon tungsten-arc welding. The argon conveying protection device comprises a main body for conveying argon and a positioning mechanism for conveying the argon to a welded branch pipe welding line. The argon conveying protection device is characterized in that the main body is composed of a sealing barrel body and an air inlet pipe. The air inlet pipe is arranged on the top surface of the sealing barrel body and is communicated with the sealing barrel body. The external diameter of the sealing barrel body is smaller than the internal diameter of a welded branch pipe, and an air outlet is formed in the side wall, close to the bottom surface, of the sealing barrel body. The positioning mechanism comprises a positioning ring and three positioning bolts, wherein the positioning ring is arranged outside the sealing barrel body in a sleeved mode, a gap is formed between the positioning ring and the sealing barrel body, the positioning bolts are in threaded connection with the positioning ring, the three positioning bolts are evenly arranged in the circumferential direction of the positioning ring, the threaded end portions of the three positioning bolts respectively abut against the sealing barrel body, and the sealing barrel body is tightly clamped at the central position of the positioning ring. According to the argon conveying protection device, argon protection can be provided for the inner side of the welding line, and the usage amount of the argon is greatly reduced.