AIR-VENT GAS LEAKAGE AUTO-LOCK DEVICE

摘要

PURPOSE: An air-vent gas leakage auto-lock device for a high-pressure-gas charging valve is provided to prevent gas explosion since a vent path is automatically blocked by the leaked high-pressure gas. CONSTITUTION: An air-vent gas leakage auto-lock device for a high-pressure-gas charging valve comprises a piston chamber(210), a rod hole(220), a piston(230), a piston rod(240), a snap ring(250), a vent hole and a leaked-gas guiding hole(270). The piston chamber is formed on the body of the high-pressure-gas charging valve. The rod hole is formed to be crossed with a vent path from the center of the piston chamber. The piston is installed in the piston chamber. The piston rod is formed on the center of the leading end of the piston and is inserted into the rod hole. A leakage groove is formed on the outer surface of a part of the piston rod and high-pressure gas is leaked into the vent hole if the leakage groove matches with the vent path.