Gas welding equipment equipped with automatic opening and closing feature

PURPOSE: A gas welding apparatus having an automatic opening/closing function is provided to prevent the leakage of fuel and oxygen gas in spite of damage or cut of gas hoses. CONSTITUTION: A gas welding apparatus having an automatic opening/closing function comprises a fuel gas distributor(10), an oxygen gas distributor(20), a torch(30), a fuel gas hose(40), an oxygen gas hose(50), a first solenoid valve(60), and a solenoid valve(70). The fuel gas distributor delivers fuel gas from a fuel gas source(110) to a plurality of fuel gas vents(130). The oxygen gas distributor delivers oxygen gas from an oxygen gas source(210) to a plurality of oxygen gas vents(230). The torch comprises a fuel gas inlet port(310) and an oxygen gas inlet port(330) which is electrically connected to the fuel gas inlet port. The fuel gas hose comprises a connector of a conductive material on one end connected to the fuel gas inlet port and is connected to the fuel gas vent of the fuel gas distributor on the other end. The oxygen gas hose comprises a connector of a conductive material on one end connected to the oxygen gas inlet port and is connected to the oxygen gas vent of the oxygen gas distributor on the other end. The first solenoid valve opens and closes the fuel gas vent of the fuel gas distributor and the flow path of the fuel gas hose. The second solenoid valve opens and closes the oxygen gas vent of the oxygen gas distributor and the flow path of the oxygen gas hose.