NOISE ATTENUATION TRIM ASSEMBLY

• US 20190032815A1
• Filed: 07/26/2017
• Published: 01/31/2019
• Est. Priority Date: 07/26/2017
• Status: Active Grant

• Current Assignee: Fisher Controls International LLC (Emerson Electric Company)
• Original Assignee: Fisher Controls International LLC (Emerson Electric Company)
• Inventors: McCarty, Michael W.
• Granted Patent: US 10,443,759 B2
• Time in Patent Office: Days
• CPC Class Codes: F16K 3/24 with cylindrical valve members
• CPC Class Codes: F16K 47/08 for decreasing pressure or noise level and having a throttling member separate from the closure member , e.g. screens, slots, labyrinths

Abstract

A control valve trim assembly has a solid, one-piece unitary body having an inner surface and an outer surface. A plenum is formed within the body and is spaced apart from the inner surface and the outer surface. A plurality of first openings are formed in the inner surface of the body and are in fluid communication with the plenum via a corresponding first fluid passages formed through the body. A plurality of second openings are formed in the outer surface of the body and are in fluid communication with the plenum via a corresponding second fluid passages through the body.

Claims

1. A control valve trim assembly, comprising:

a solid, one-piece unitary body having an inner surface and an outer surface;

a plenum formed within the body and spaced apart from the inner surface and the outer surface;

a plurality of first openings formed in the inner surface of the body, each of the first openings in fluid communication with the plenum via a corresponding first fluid passage formed through the body; and

a plurality of second openings formed in the outer surface of the body, each of the second openings in fluid communication with the plenum via a corresponding second fluid passage through the body.

2. The control valve trim assembly of claim 1, further comprising a baffle positioned within the plenum, the baffle extending into the plenum between the first and second fluid passages.

3. The control valve trim assembly of claim 1, wherein each of the first and second fluid passages has at least one radially extending portion and at least one longitudinally extending portion.

4. The control valve trim assembly of claim 1, wherein the plurality of first and second openings are formed in a first section of the body and the plenum is formed in a second section of the body, longitudinally adjacent to the first section.

5. The control valve trim assembly of claim 1, wherein the plenum is annular.

6. The control valve trim assembly of claim 1, wherein at least one surface of the plenum, opposite the first and second fluid passages, is arcuate.

7. A control valve including the control valve trim assembly of claim 1, the control valve further 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; and

a valve plug positioned within the valve body and movable between an opened position and a closed position to modulate a flow of a fluid through the control valve;

wherein

the trim assembly is disposed within the valve body adjacent the valve seat and proximate the valve plug.

8. A control valve trim assembly, comprising:

a body having an annular first section and a longitudinally adjacent annular second section, the body defining an inner surface and an outer surface;

a plenum formed within the second section of the body and spaced apart from the inner surface and the outer surface;

a plurality of first openings formed in the inner surface of the first section of the body, each of the first openings in fluid communication with the plenum via a corresponding first fluid passage formed through the body; and

a plurality of second openings formed in the outer surface of the first section of the body, each of the second openings in fluid communication with the plenum via a corresponding second fluid passage through the body.

9. The control valve trim assembly of claim 8, wherein the body is a solid, one-piece unitary body.

10. The control valve trim assembly of claim 8, wherein the first section comprises a cage and the second section comprises a cage retainer connected to the cage.

11. The control valve trim assembly of claim 8, further comprising a baffle positioned within the plenum, the baffle extending into the plenum between the first and second fluid passages.

12. The control valve trim assembly of claim 8, wherein each of the first and second fluid passages has at least one radially extending portion and at least one longitudinally extending portion.

13. The control valve trim assembly of claim 8, wherein the plenum is annular.

14. The control valve trim assembly of claim 8, wherein at least one surface of the plenum, opposite the first and second fluid passages, is arcuate.

15. A control valve including the trim assembly of claim 8, the control valve further 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; and

a valve plug positioned within the valve body and movable between an opened position and a closed position to modulate a flow of a fluid through the control valve;

wherein

the trim assembly is disposed within the valve body adjacent the valve seat and proximate the valve plug.

16. A control valve trim assembly, comprising:

a body having an annular first section and a longitudinally adjacent annular second section, the body defining an inner surface and an outer surface;

a plurality of first openings formed in the inner surface of the first section of the body; and

a plurality of second openings formed in the outer surface of the first section of the body;

wherein

each of the first openings is in fluid communication with a corresponding second opening via a fluid passage formed through the body, the fluid passages passing through the first section and the second section; and

each of the fluid passages has at least one radially extending portion and at least one longitudinally extending portion.

17. The control valve trim assembly of claim 16, wherein the body is a solid, one-piece unitary body.

18. The control valve trim assembly of claim 16, wherein the first section of the body is a cage and the second section of the body is a cage retainer connected to the cage.

19. The control valve trim assembly of claim 16, wherein each of the fluid passages comprises a variable cross-sectional area.

20. A control valve including the trim assembly of claim 16, the control valve further 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; and

a valve plug positioned within the valve body and movable between an opened position and a closed position to modulate a flow of a fluid through the control valve;

wherein

the trim assembly is disposed within the valve body adjacent the valve seat and proximate the valve plug.