VALVE FOR HIGH-PRESSURE GAS CYLINDERS Russian patent published in 2004 - IPC

FIELD: charging equipment for gas cylinders used in stationary fire-fighting systems. SUBSTANCE: valve has body 2 having lower end with threaded connection 3, whose inner channel 3a is open toward round chamber 4. Central opening 8 in dome of round chamber 4 define inlet orifice of ascending channel 9 arranged above it. Ascending channel 9 is open toward cylindrical chamber 10 defined in valve body 2 and closed in hermetically sealing relationship by means of cover 11, which is screwed onto outer surface of cylindrical chamber 10. Sealed piston 12 is positioned for sliding inside chamber 10. Piston rod 13 is inserted into axial channel 9 for sliding inside it. Rod 13 holds with its lower end baffle plate 14 provided with layer 14a, which hermetically seals inlet orifice 8 of channel 9 arranged above it by means of return spring 15. Spring 15 is mounted on rod 13 and is adapted for applying of constant raising load to piston 12. Radial opening 9a arranged lengthwise of channel 9 is adapted for supplying gas into outlet connection 21 for gas. Opening 22 arranged lengthwise of channel 3a is open at its outside into threaded connection. Charging valve 23 is screwed into threaded seat. Three openings 5,6 and 7 are arranged along side wall of chamber 4. Said openings are arranged in angular offset relation with respect to one another by 90 deg. Opening 5 defines seat for sliding insertion of stopper 16. Layer 16a and pin 16b are arranged on rear side of stopper 16. Layer 16a and pin 16b close small opening 17a, which is open at its outside in center of connection 17. Valve opening drive is positioned adjacent to opening 17a, which is communicated via through channel 18 with space 18a between cover 11 and piston 12. Branch pipe 6a for pressure sensor 19 is screwed into opening 6. Pressure meter 20 is positioned in opening 7. Gas cylinder is actuated automatically upon generation of signals by sensors arranged in controlled office or building rooms. EFFECT: simplified charging procedure owing to charging of empty cylinders without necessity of disconnecting valves from gas discharge hose. 6 dwg