Gas protection device for pipe welding

The invention provides a gas protection device for pipe welding. High-temperature-resistant fireproof cloth is fixed to the two side edges of the bottom face of a cover plate, and the lower end of thehigh-temperature-resistant fireproof cloth makes contact with the outer pipe wall of a welding pipe; a gas flow dividing device which is located between the high-temperature-resistant fireproof clothand used for enabling argon to be divided and evenly sprayed downwards is fixed to the bottom face of the cover plate; a gas inlet nozzle communicating with the gas flow dividing device is fixed to the top face of the cover plate; and an arc groove is formed in one end of the cover plate, and an argon arc welding gun penetrating the arc groove to stretch into the position between the high-temperature-resistant fireproof cloth is fixed to the cover plate through a welding gun fixing frame arranged on the top of the cover plate. According to the gas protection device, gas filling conditions areprovided for argon protect