High pressure anti-cavitation cage
AssigneeFisher Controls International LLC
InventorsThomas N. Gabriel, Raymond W. Micheel
Life of this patent
Estimating the term…
Abstract
A control valve has a cage disposed within a valve body adjacent a valve seat and proximate a valve plug to provide guidance for the valve plug. The cage includes a solid, unitary circumferential wall with inlet passages adjacent one of an inner surface or an outer surface and outlet passages adjacent the other of the inner and outer surface. An annular cavity is spaced apart from the inner and outer surfaces and is connected to the inlet passages. Intermediate passages are connected to the annular cavity and recovery plenums interconnect the intermediate passages and the outlet passages. The recovery plenums have cross-sectional areas that are larger than a cross-sectional areas of the intermediate and outlet passages.
Claims20
A control valve, comprising:
- a valve body having an inlet and an outlet;
- a valve seat positioned in a passageway of the valve body between the inlet and the outlet;
- a valve plug positioned within the valve body and movable between a closed position, in which the valve plug sealingly engages the valve seat, and an open position, in which the valve plug is spaced away from the valve seat;
- and
- a cage disposed within the valve body adjacent the valve seat and proximate the valve plug to provide guidance for the valve plug, the cage comprising:
- a solid, unitary circumferential wall having an inner surface and an outer surface;
- a plurality of inlet passages adjacent one of the inner surface or the outer surface;
- an annular cavity spaced apart from the inner surface and the outer surface and connected to the plurality of inlet passages;
- a plurality of intermediate passages connected to the annular cavity;
- a plurality of outlet passages adjacent the other of the inner surface or the outer surface;
- and
- a plurality of recovery plenums interconnecting the intermediate passages and the outlet passages, wherein the plurality of recovery plenums each have a cross-sectional area that is larger than a cross-sectional area of the intermediate passages and a cross-sectional area of the outlet passages.
A cage for a control valve, the cage comprising:
- a solid, unitary circumferential wall having an inner surface and an outer surface;
- a plurality of inlet passages adjacent one of the inner surface or the outer surface;
- an annular cavity spaced apart from the inner surface and the outer surface and connected to the plurality of inlet passages;
- a plurality of intermediate passages connected to the annular cavity;
- a plurality of outlet passages adjacent the other of the inner surface or the outer surface;
- and
- a plurality of recovery plenums interconnecting the intermediate passages and the outlet passages, wherein the plurality of recovery plenums each have a cross-sectional area that is larger than a cross-sectional area of the intermediate passages and a cross-sectional area of the outlet passages.
A control valve, comprising:
- a valve body having an inlet and an outlet;
- a valve seat positioned in a passageway of the valve body between the inlet and the outlet;
- a valve plug positioned within the valve body and movable between a closed position, in which the valve plug sealingly engages the valve seat, and an open position, in which the valve plug is spaced away from the valve seat;
- and
- a cage disposed within the valve body adjacent the valve seat and proximate the valve plug to provide guidance for the valve plug, the cage comprising:
- a solid, unitary circumferential wall having an inner surface and an outer surface;
- a plurality of inlet passages adjacent one of the inner surface or the outer surface;
- a plurality of outlet passages adjacent the other of the inner surface or the outer surface;
- a means for providing a first pressure drop between the plurality of inlet passages and the plurality of outlet passages;
- and
- a means for providing a second pressure drop between the plurality of inlet passages and the plurality of outlet passages.
Dependencies are inferred from the claim text.