VALVE Russian patent published in 2023 - IPC F16K17/38 F16K17/40 

FIELD: protective devices.

SUBSTANCE: invention relates to protective devices and is intended for use in the field of mechanical engineering, in particular for depressurization of the hermetic volume of the shell in case of exceeding the specified temperature or predetermined hydrostatic pressure in the area where the device is located, acting on the outer surface of the shell. The valve contains a housing in the form of a glass, a sealing sealing ring, connecting elements. On the outer bottom surface of the housing, a plate is diametrically fixed, the ends of which protrude beyond the boundary of the bottom surface of the housing and are designed to rest on the outer surface of the shell. The geometrical parameters and material of the plate are chosen from the condition of free deformation of its ends under the influence of a given external, in relation to the shell, hydrostatic pressure. An annular groove for a sealing element is made on the outer side surface of the housing. On the inner bottom surface of the housing, a locking element is diametrically fixed, made in the form of a zigzag plate made of a shape memory alloy. The length of the locking element plate is chosen from the condition of ensuring that its ends rest on the outer surface of the shell before the valve is exposed to a temperature above a predetermined level, and after the valve is exposed to a temperature above a predetermined level, the housing can move freely inside the package.

EFFECT: invention provides depressurization of the shell, on which the valve is installed, when the specified temperature value and/or when the specified external hydrostatic pressure is exceeded to prevent an emergency.

1 cl, 2 dwg