GAS-SUPPLY SYSTEM FOR FLAME MACHINING OF METALS Russian patent published in 2000 - IPC

FIELD: welding equipment. SUBSTANCE: gas-supply system has cylinder with gas-acetylene substitute, except for hydrogen, cylinder with oxygen or air, reducers, connecting hoses, and safety devices. The latter positioned at outlets of reducers are made as check valves interlocked with flame-extinguishing bushings at outlet. Check valves are manufactured in the form of plungers interacting with seats and spring-loaded relative to rests. Springs and rests of plungers of check valves are arranged in flame-extinguishing bushings coaxially. Inlets of flame-extinguishing bushings are combined with seat holes of check valves. Outlets of flame-extinguishing bushings communicate with hoses, and inlets of check valves are connected to reducer outlets. Safety devices installed at inlets of flame-machining device are manufactured as the second check valves and their inlets are coupled to hoses and outlets, to inlets of flame-machining device. EFFECT: higher operational reliability. 3 dwg