VIBRATION-RESISTANT DRAIN SAFETY VALVE Russian patent published in 2016 - IPC F16K17/10 

FIELD: rocket construction.

SUBSTANCE: invention relates to aerospace engineering, in particular, to drain-safety valves (DSV) of fuel feed system to engine pumps, operating in wide range of frequencies of external vibration action and intended to maintain within a pressure range in gas cavities of fuel tanks by releasing excess gas pressure, as well as for drainage of gas from tanks when filling and draining of liquids therefrom (for example, rocket fuel). Vibration-resistant drain safety valve comprises main and auxiliary spring-type valves, tightly connected to each other and to protected tank by means of flexible pipes. Main valve is connected to protected tank tightly and rigidly. On auxiliary valve housing there are rigidly fixed elastic elements, for example vibration isolators, through which, by means of a bracket, auxiliary valve is fixed on frame of article. Main and auxiliary valves in operating state are in mode of external vibration action.

EFFECT: invention is aimed at improving operational capabilities of DSV under effect of external vibrations.

1 cl, 4 dwg