Gas storage tank for welding

The utility model relates to the technical field of welding gas cylinders, and discloses a gas storage tank for welding, which comprises a tank body and a gas valve, the gas valve is connected to the middle of the upper surface of the tank body and communicated with the inside of the tank body, a ring block is fixed around the outer ring of the bottom of the tank body, and a heat insulation sleeve is sleeved on the outer ring of the tank body above the ring block. The lower portion of the heat insulation sleeve is supported above the ring block, a sponge is fixed to the inner surface of the heat insulation sleeve and tightly attached to the surface of the tank body, and an electric heating wire is fixedly embedded into the sponge. According to the technical scheme, the heat insulation sleeve is arranged on the outer ring of the lower portion of the tank body in the sleeving mode, abuts against the upper portion of the ring block and is tightened and fixed by the rubber band, and when the temperature and air p