Aerodynamic noise reduction cage

Patent metadata

Field	Value
Publication number	US-9759348-B2
Application number	US-201514714906-A
Country	US
Kind code	B2
Filing date	May 18, 2015
Priority date	May 18, 2015
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

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 circumferential wall having inner and outer surfaces and a plurality of passages formed through the wall. Each passage can have a first portion extending from the inner surface and a second portion extending from the outer surface, where the second portion has a diameter smaller than that of the first portion, can follow a non-linear path from the inner to outer surface, and/or can have a cross-sectional area that varies from the inner to 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 circumferential wall having an inner surface, an outer surface, a first end, and a second end;
a sealed cavity formed in the wall of the cage, the sealed cavity being spaced apart from the inner surface, the outer surface, the first end, and the second end of the wall; and
a plurality of passages formed through the wall and extending between the inner surface and the outer surface; wherein
each of the passages comprises a first portion and a second portion;
the first portion of the passage extends from the inner surface of the wall and has a first cross-sectional area; and
the second portion of the passage extends from the outer surface of the wall and has a second cross-sectional area, smaller than the first cross-sectional area.

2. The control valve of claim 1 , wherein the circumferential wall of the cage is solid.

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

4. The control valve of claim 3 , wherein the cross-sectional area is one of a square, a rectangle, a triangle, an oval, a stars, a polygon, and an irregular shape.

5. 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, an outer surface, a first end, and a second end;
a sealed cavity formed in the wall of the cage, the sealed cavity being spaced apart from the inner surface, the outer surface, the first end, and the second end of the wall; and
a plurality of passages formed through the wall and extending between the inner surface and the outer surface; wherein
each of the passages comprises a cross-sectional area that varies in size from the inner surface to the outer surface.

6. The control valve of claim 5 , wherein each of the passages comprises a non-circular cross-sectional area.

7. The control valve of claim 6 , wherein the cross-sectional area is one of a square, a rectangle, a triangle, an oval, a stars, a polygon, and an irregular shape.

8. A cage for a control valve, the cage comprising:
a circumferential wall having an inner surface, an outer surface, a first end, and a second end;
a sealed cavity formed in the wall of the cage, the sealed cavity being spaced apart from the inner surface, the outer surface, the first end, and the second end of the wall; and
a plurality of passages formed radially through the wall from the inner surface to the outer surface; wherein
each of the passages comprises a first portion and a second portion;
the first portion of the passage extends from the inner surface of the wall and has a first cross-sectional area; and
the second portion of the passage extends from the outer surface of the wall and has a second cross-sectional area, smaller than the first cross-sectional area.

9. The cage of claim 8 , wherein the circumferential wall is solid.

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

11. The cage of claim 10 , wherein the cross-sectional area is one of a square, a rectangle, a triangle, an oval, a stars, a polygon, and an irregular shape.

12. A cage for a control valve, the cage comprising:
a solid, unitary circumferential wall having an inner surface, an outer surface, a first end, and a second end;
a sealed cavity formed in the wall of the cage, the sealed cavity being spaced apart from the inner surface, the outer surface, the first end, and the second end of the wall; and
a plurality of passages formed through the wall and extending between the inner surface and the outer surface; wherein
each of the passages comprises a cross-sectional area that varies in size from the inner surface to the outer surface.

13. The cage of claim 12 , wherein each of the passages comprises a non-circular cross-sectional area.

14. The cage of claim 13 , wherein the cross-sectional area is one of a square, a rectangle, a triangle, an oval, a stars, a polygon, and an irregular shape.

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

• F16K3/246

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

• F16K47/02 Primary

  for preventing water-hammer or noise · CPC title

• F16K1/32

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