Liquid purification or separation – Tangential flow or centrifugal fluid action – Multiple cyclone
Patent
1978-03-30
1979-08-07
Spear, Frank A.
Liquid purification or separation
Tangential flow or centrifugal fluid action
Multiple cyclone
55432, 251212, B01D 2126
Patent
active
041637267
ABSTRACT:
A valve assembly for controlling the flow of material in a duct such as a pipeline, outlet of a cyclone, nozzle and the like. The assembly is particularly suitable for controlling spiralling flows and includes a plurality of elongated valve members pivotally mounted at a first end to a support. Each valve member has at least two elongated and substantially planar sides extending from the first end to a second end. The two planar sides are joined to form a leading edge. The valve members are supported in an overlapping relationship and a mechanism closes the valve assembly by moving the second ends of the valve members toward each other. As the valve assembly closes, the leading edge of each valve member pivots about an axis and moves in a path along a plane extending radially from the axis of the valve assembly. The valve assembly is biased in the open position by the support means, and, as the valve assembly closes, the leading edge of each valve member in cooperation with the outwardly biasing force from the support means and reacting to the internal pressure drop across the valve forceably scrapes a side of an adjacent valve member in order to form a seal therewith. The leading edges of the valve members converge toward a common point as the valve assembly closes.
REFERENCES:
patent: 497903 (1893-05-01), Woodward
patent: 2648433 (1953-08-01), Wright et al.
patent: 2911997 (1959-11-01), Schramm et al.
patent: 3618925 (1971-11-01), Girolami
Hughart Robert P.
Wilson Peter C.
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