SHUTOFF VALVE OF SUPERCHARGING-DRAIN LINE OF SUSPENDED FUEL TANK Russian patent published in 2021 - IPC B64D37/32 F02C7/232 F16K17/10 

FIELD: aircraft fuel systems.

SUBSTANCE: cutoff valve of drain pipe-supercharging line of suspended fuel tank of aircraft includes hollow cylindrical housing consisting of upper (1) and lower (2) parts, rigidly connected to each other by flange connection. In the upper part of the housing there is movable tip (6) connected to the drain-supercharge line inside the aircraft wing, and in lower part of housing there is nozzle (14) connected to main line of drain-supercharge of suspended fuel tank. In the cavity of the lower part of the casing cylindrical sleeve (7) is installed coaxially, in which a cylindrical hollow float element (8) is installed with a gap from the wall and the bottom of the cartridge. In the barrel body in its lower part there are holes made around the circumference. On the upper end face of the sleeve along its circumference there are tabs (10) forming through working openings. Cylindrical bore (12) is made on the flange of the upper part of the housing on the side of the cylindrical barrel. Cylindrical cartridge feet are fitted by free ends in cylindrical bore and pressed by flange of housing lower part.

EFFECT: invention eliminates occurrence of emergency situations and increases reliability of the system of drain-supercharge and fuel system of the aircraft as a whole.

1 cl, 1 dwg