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

FIELD: welding equipment. SUBSTANCE: system has cylinder with gas-substitute of acetylene, except for hydrogen, cylinder with oxygen or air, reducers positioned at outlets of every cylinder, and coupling hoses. System also includes safety devices installed at inlets of flame-machining device and at outlets of reducers and made, respectively, in the form of check valves outlet-interlocked with flame-extinguishing bushings and second check valves manufactured as plungers interacting with seats and spring-loaded relative to rests. Springs and plungers rests are arranged coaxially in flame-extinguishing bushings, and their inlets are combined with holes of check valve seats. Outlets of flame-extinguishing bushings are coupled to inlets of flame-machining device, and inlets of check valve communicate with hoses. EFFECT: higher operational reliability. 1 dwg