Aerodynamic noise reduction cage

Patent metadata

Field	Value
Publication number	US-10539252-B2
Application number	US-201715673697-A
Country	US
Kind code	B2
Filing date	Aug 10, 2017
Priority date	May 18, 2015
Publication date	Jan 21, 2020
Grant date	Jan 21, 2020

Abstract

A control valve has a body having an inlet and outlet, a valve seat between the inlet and outlet, a valve plug, and a cage adjacent the valve seat to provide guidance for the valve plug. The valve plug is movable between a closed position, where the valve plug sealingly engages the valve seat, and an open position, where the valve plug is spaced away from the valve seat. The cage has a solid, unitary circumferential wall having inner and outer surfaces and a plurality of passages formed through the wall. Each passage extends between the inner and outer surfaces and follows an arcuate, non-linear path from the inner surface to the outer surface.

First claim

What is claimed is:

1. A control valve, comprising:
a body having an inlet and an outlet;
a valve seat positioned in a passageway of the body between the inlet and the outlet;
a valve plug positioned within the 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 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 sealed cavity formed in the wall of the cage; and
a plurality of passages formed through the wall and extending between the inner surface and the outer surface; wherein
each of the passages follows an arcuate, non-linear path from the inner surface to the outer surface.

2. The control valve of claim 1 , wherein the arcuate, non-linear path is helical.

3. The control valve of claim 1 , wherein the arcuate, non-linear path is spiral.

4. The control valve of claim 1 , wherein each of the passages comprises a non-circular cross-sectional area.

5. The control valve of claim 4 , wherein the cross-sectional area is one of a square, a rectangle, a triangle, an oval, a stars, a polygon, and an irregular shape.

6. The control valve of claim 1 , wherein:
the wall has a first end and a second end; and
the sealed cavity is spaced apart from the inner surface, the outer surface, the first end, and the second end of the wall.

7. The control valve of claim 1 , wherein each of the passages comprises a cross-sectional area that varies from the inner surface to the outer surface.

8. A cage for a control valve, the cage comprising:
a solid, unitary circumferential wall having an inner surface and an outer surface;
a sealed cavity formed in the wall of the cage; and
a plurality of passages formed through the wall and extending between the inner surface and the outer surface; wherein
each of the passages follows an arcuate, non-linear path from the inner surface to the outer surface.

9. The cage of claim 8 , wherein the non-linear path is helical.

10. The cage of claim 8 , wherein the non-linear path is spiral.

11. The cage of claim 8 , wherein each of the passages comprises a non-circular cross-sectional area.

12. The cage of claim 11 , wherein the cross-sectional area is one of a square, a rectangle, a triangle, an oval, a stars, a polygon, and an irregular shape.

13. The cage of claim 8 , wherein:
the wall has a first end and a second end; and
the sealed cavity is spaced apart from the inner surface, the outer surface, the first end, and the second end of the wall.

14. The cage of claim 8 , wherein each of the passages comprises a cross-sectional area that varies from the inner surface to the outer surface.

Assignees

• Fisher Controls Int Llc

Inventors

• Adams Daniel M
• Fagerlund Allen C
• Gossett James L
• O'Shea Patrick L
• Eilers Daniel J
• Wears William E

Classifications

• F16K47/08 Primary

  for decreasing pressure {or noise level} and having a throttling member separate from the closure member {, e.g. screens, slots, labyrinths} · CPC title

• F16K47/02 Primary

  for preventing water-hammer or noise · CPC title

• F16K3/246

  Combination of a sliding valve and a lift valve · CPC title

• F16K1/32

  Details (details of more general applicability F16K25/00 - F16K51/00) · CPC title