Explosion-proof welding tee joint

The utility model discloses an explosion-proof welding tee joint which comprises a main pipe and a branch pipe, a square pipe is arranged in the middle of the main pipe, first conical pipes are arranged on the two sides of the main pipe, the branch pipe comprises a second conical pipe arranged on the square pipe, a straight pipe is arranged on the second conical pipe, and the inner diameter of the straight pipe is the same as that of the second conical pipe. The outer diameter of the straight pipe is equal to the outer diameter of the small end of the second conical pipe, chamfers are arranged at the outer ends of the first conical pipe and the straight pipe, the included angle between the inclined face and the end face of each chamfer ranges from 30 degrees to 35 degrees, the end face, connected with the first conical pipe, of the square pipe is square, and the diameter of the large end of the first conical pipe is equal to the length of the square. The end face, connected with the second conical pipe, of th