Valves and valve actuation – Mechanical movement actuator – Linkage
Patent
1984-04-30
1987-01-20
Scott, Samuel
Valves and valve actuation
Mechanical movement actuator
Linkage
138 93, 277 34, F16K 3144, F16L 5512
Patent
active
046375880
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 an elongated shaft coupled at one end thereof to an anchor assembly frictionally engageable with the inner surface of the nozzle to anchor the dam in place and a fluid-impermeable seal apparatus coupled to the shaft and closing the nozzle and frictionally engageable with the inner surface thereof to form a fluid-tight seal. The seal apparatus includes a circular plate disposable in wedging frictional engagement with a frustoconical portion of the nozzle inner surface. The shaft extends through a central aperture in the plate and is threadedly engaged with a nut which holds the plate in place. The anchor assembly includes a foldable tripod arrangement coupled to the shaft in such a way that movement of the shaft toward the seal plate effects an increase in the frictional anchoring force. The seal assembly also includes an inflatable portion. In one embodiment this inflatable portion extends around the perimeter of the seal plate and is readily expandable. In another embodiment the inflatable portion includes inflatable pillows disposed between the seal plate and the anchor assembly and inflatable for completely closing the nozzle. A foldable tripod centering mechanism and a shaft tensioning tool are also disclosed.
REFERENCES:
patent: 1202704 (1916-10-01), Goff
patent: 1808411 (1931-06-01), Hinkston
patent: 2238710 (1941-04-01), Shapiro
patent: 2942666 (1960-06-01), True et al.
patent: 3052302 (1962-09-01), Lagucki
patent: 3204697 (1965-09-01), Gaut
patent: 3537483 (1970-11-01), Teague, Jr.
patent: 3593749 (1971-07-01), Reardon
patent: 3618811 (1971-11-01), Martino
patent: 3707758 (1973-01-01), Townsend
patent: 3722895 (1973-03-01), Mevissen
patent: 3884261 (1975-05-01), Clynch
patent: 4109922 (1978-08-01), Martin
patent: 4140240 (1979-02-01), Platts
patent: 4185806 (1980-01-01), Dremann
patent: 4248271 (1981-02-01), Burgess
patent: 4262702 (1981-04-01), Streich
patent: 4285368 (1981-08-01), Terrill et al.
patent: 4291727 (1981-09-01), Yie et al.
patent: 4349204 (1982-09-01), Malone
patent: 4422477 (1983-12-01), Wittman et al.
patent: 4442867 (1984-04-01), de Sivry et al.
patent: 4470946 (1984-09-01), Vassalotti et al.
patent: 4482076 (1984-11-01), Wentzell
patent: 4483457 (1984-11-01), Schukei et al.
patent: 4518015 (1985-05-01), Fischer
"Steam Generator Nozzle Dams for Primary Head Activities", Lewis & Woods, American Society of Mechanical Engineers, Mar. 12, 1980.
Calhoun Gregory L.
Dawson Paul H.
Kramer Arthur W.
Wilhelm John J.
DePaul L. A.
Odar H. A.
Scott Samuel
Westinghouse Electric Corp.
LandOfFree
Non-bolted ringless nozzle dam does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Non-bolted ringless nozzle dam, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-bolted ringless nozzle dam will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2131386