Pipes and tubular conduits – With closures and plugs – Inflation stem type
Patent
1985-12-17
1987-09-01
Marcus, Stephen
Pipes and tubular conduits
With closures and plugs
Inflation stem type
220232, 376204, F16L 5512
Patent
active
046901728
ABSTRACT:
A nozzle dam for providing a fluid-tight seal across a primary fluid nozzle in the plenum of a nuclear steam generating vessel includes two fluid-impermeable seals, each comprising a circular three-section foldable seal plate covered with a flexible diaphragm and circumferentially encompassed by an inflatable seal member disposable in frictional sealing engagement with the inner surface of the nozzle. The center sections of the two seals are interconnected by tubular coupling means. The diaphragms are disposed on the high pressure sides of the seal plates, and the sections of each seal plate are hinged on the high pressure side. The center section of each seal plate carries two pairs of support tabs attached to the low pressure side thereof and respectively projecting from opposite ends thereof in cantilever fashion for supported engagement with a frustoconical portion of the inner surface of the nozzle.
REFERENCES:
patent: 4482076 (1984-11-01), Wentzell
patent: 4483457 (1984-11-01), Schukei et al.
patent: 4518015 (1985-05-01), Fischer
Westinghouse Electric Corporation Drawings No. 1474E13 (2 sheets) and 1474E16, filed 9-17-84.
"Steam Generator Nozzle Dams for Primary Head Activities", Lewis & Woods, American Society of Mechanical Engineers, Mar. 12, 1980.
DePaul L. A.
Marcus Stephen
Thronson Mark
Westinghouse Electric Corp.
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