Main steam line plug and locking ring

Details Main steam line plug and locking ring Main steam line plug and locking ring

1993-03-19

1996-06-04

Bryant, III, James E.

Pipes and tubular conduits

With closures and plugs

Inflatable

138 89, 376203, F16L 5510, F16L 5518

Patent

active

055224326

ABSTRACT:
A plug which is inserted into the nozzle of nuclear reactor steam line is provided with a set of inflatable primary seals which resemble a pair of tires. A locking ring which features pads which can be hydraulically driven radially outward into engagement with the nozzle wall, is located adjacent the tire-like inflatable seals. The latter are inflated by a spring loaded piston. A tool which inserts the plug into the nozzle is adapted to tract the piston against the bias of the preloading springs, until such time as the plug is inserted into position. After insertion the piston is released and the seals are inflated.

REFERENCES:
patent: 3593749 (1971-07-01), Reardon
patent: 3884261 (1975-05-01), Clynch
patent: 4470946 (1984-09-01), Vassalotti
patent: 4518015 (1985-05-01), Fischer
patent: 4584162 (1986-04-01), Yoli
patent: 4591477 (1986-05-01), Rettew
patent: 4637588 (1987-01-01), Wilhelm et al.
patent: 4690172 (1987-09-01), Everett
patent: 4769207 (1988-09-01), Weber et al.
patent: 4827984 (1989-05-01), Young et al.
patent: 4848406 (1989-07-01), Stauner et al.

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