F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
251/15, 182/151,
F16K 31/00 (2006.01)
Patent
CA 1064458
VALVE ASSEMBLY FOR CONTROLLING THE FLOW OF ABRASIVE MATERIAL IN A DUCT 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. In one embodiment, the valve members and support means are made of a one-piece construction forming a unitary member. The invention also includes a new and novel combination of the valve assembly with a hydrocyclone. In the combination, the first side of each valve member is supported at the first end portion thereof to be substantially flush with the material outlet of the hydrocyclone. In a preferred embodiment, the hydrocyclone has a lower, conical portion tapering toward the material outlet thereof and the valve assembly forms a conical continuation of the lower portion of the hydrocyclone as the valve assembly closes. This provides for a smooth transition of the flowing material from the hydrocyclone outlet through the valve assembly and better control of the flow. -2-
302164
Hughart Robert P.
Wilson Peter C.
Hughart Robert P.
Wilson Peter C.
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