FITTING OF A RECESSED BOSS WITH AN EXCESS SEALER Russian patent published in 2021 - IPC F17C1/06 F17C13/06 

FIELD: mechanical engineering.

SUBSTANCE: group of inventions relates to the boss unit for a pressure vessel and includes a boss, a fitting, a first seal and a second seal. The boss includes a hole with an inner surface and the first thrust element. The fitting is made with the possibility of partial insertion into the boss to prevent fluid communication between the inner area and the outer area of the pressure vessel. The fitting includes an outer surface and a second thrust element. Each of the first and second seals is located on the outer surface. The fitting is movable between the first and second positions. In the first position, the first seal is hermetically engaged between the inner and outer surfaces, and the second seal is not hermetically engaged between them. In the second position, the first seal is not hermetically engaged between the inner and outer surfaces, the second seal is hermetically engaged, and the first and second thrust elements are in mutual contact.

EFFECT: sealing of the pressure vessel boss unit.

15 cl, 11 dwg