DEVICE FOR FEEDING OXYGEN TO PRESSURE CHAMBER Russian patent published in 1995 - IPC

FIELD: diving technique. SUBSTANCE: device has oxygen source 1 connected by means of pipe lines through reducer 2 and electromagnetic valve 3 with oxygen distributor 4 in proportioner 5 made in form of bubbler whose air chamber is connected through electromagnetic valve 12 and non-return valve 15 with cermet oxygen distributor 16 mounted in mixer 17 which is included in recirculating loop of pressure chamber. Oxygen is moistened to reduce its explosive risk in mixture with hydrogen in proportioner 5 and is fed at constant rate by signal from automatic regulator 9 to mixer 17 included in recirculating loop of pressure chamber where it is mixed with gas mixture; besides that, mixer is equipped with sensor 27 to check partial pressure of oxygen; in case of explosive concentration, signal is furnished from this sensor and helium is supplied to mixer from bottle 24. EFFECT: improved service characteristics due to high safety of feeding oxygen to hydrogen-containing gas medium of pressure chamber. 5 cl, 1 dwg