CONTROL DEVICE FOR SUPPLYING OF FIRE-EXTINGUISHING AGENT TO SPRAYING HEAD FOR THE PURPOSE OF FIRE FIGHTING Russian patent published in 2003 - IPC

FIELD: fire-fighting equipment. SUBSTANCE: device has liquid source and gas source, mixing means for mixing of liquid from liquid source with gas from gas source, and feeding means for introducing of liquid and gas into spraying head. Fire extinguishing agent having liquid component and gaseous component is supplied to spraying head for further discharging thereof from spraying head as mixture of gas and liquid droplets. Mixing means comprises cylindrical piston mechanism having first piston arranged into first cylinder and second piston arranged into second cylinder. First cylinder has first and second chambers, second cylinder also has first and second chambers. Mixing means further comprises gas source alternately connected with first cylinder second chamber and with second cylinder second chamber by pipeline system. Distribution valve connected to pipeline system is adapted for maintaining of connection between gas source and first cylinder second chamber in unlocked state and connection between second cylinder second chamber and outlet pipeline of feeding means in unlocked state while setting of control device in first working position. Distribution valve also serves for maintaining of connection between gas source and second cylinder second chamber in unlocked state and connection between first cylinder second chamber and outlet pipeline in unlocked state while setting of control device in second working position. EFFECT: increased discharge time, possibility of fire-extinguishing agent spraying in aqua-mist form, decreased water droplets size. 15 cl, 8 dwg _