Expansible chamber devices – Collapsible chamber wall portion – Wall portion formed of flexible material
Patent
1980-09-15
1984-02-07
Nilson, Robert G.
Expansible chamber devices
Collapsible chamber wall portion
Wall portion formed of flexible material
92 98D, 92107, F01B 1900
Patent
active
044296223
ABSTRACT:
A valve for automatically dumping a load of solids entrained within a fluid transport medium in response to flow interruption is disclosed. The automatic dump valve is particularly well-suited for use in combination with a module transport riser in deep ocean mining operations. The automatic dump valve system is combined with a tubular conduit defining a longitudinally extending flow passage having a sidewall opening defining a dump port. The automatic dump valve assemby includes a movable dump port cover plate and a hydraulic actuator coupled to the cover plate The hydraulic actuator is operably responsive to pressure changes within the flow passage relative to the pressure exerted by a surrounding body of water to open and close the dump port. The hydraulic actuator is formed by the combination of a sidewall portion of the tubular conduit constricting the flow passage thereby defining a venturi flow region, and a pressure chamber housing enclosing the conduit section and defining an annular pressure chamber. The pressure chamber is divided by a movable piston into a first chamber which is connected in fluid communication with the venturi passage, and a second pressure chamber which is exposed to hydraulic pressure exerted by the surrounding body of water. The dump valve further includes a deflector plate mounted within the tubular housing for movement from a clear passage position to a dump position, with the deflector plate extending from the dump port transversely through the flow passage in the dump position thereby defining a bypass channel for diverting settling solids through the dump port.
REFERENCES:
patent: 421150 (1890-02-01), Whittier
patent: 955959 (1910-04-01), Furlow
patent: 1010000 (1911-11-01), Snyder
patent: 1788298 (1931-01-01), Hottel
patent: 2134597 (1938-10-01), Boden
patent: 2731534 (1956-01-01), Hansen
patent: 3253608 (1966-05-01), Davis
Nilson Robert G.
SEDCO, Inc.
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