Valve trim apparatus for use with control valves

Patent metadata

Field	Value
Publication number	US-10605370-B2
Application number	US-201815863436-A
Country	US
Kind code	B2
Filing date	Jan 5, 2018
Priority date	Jan 5, 2018
Publication date	Mar 31, 2020
Grant date	Mar 31, 2020

Abstract

Valve trim apparatus for use with fluid valves are disclosed. An example valve trim apparatus includes a cage to be positioned in a fluid flow passageway of a valve body. The cage has a cage body defining a first end and a second end opposite the first end. The cage has an opening extending through the body between the first end and the second end. A valve seat is positioned in the opening of the cage body between the first end and the second end of the cage body. The valve trim apparatus is to allow fluid flow between the inlet and the outlet when the fluid valve is in a closed position.

First claim

What is claimed is:

1. A valve trim apparatus for use with a fluid valve comprising:
a cage to be positioned in a fluid flow passageway of a valve body, the cage having a cage body defining a first end and a second end opposite the first end, the cage having an opening extending through the cage body between the first end and the second end to slidably receive a flow control member, the cage body defining a side wall having a first aperture and a second aperture formed through the side wall; and
a valve seat positioned in the opening of the cage body between the first aperture and the second aperture of the cage body, the valve trim apparatus to allow fluid flow through the first and second apertures when the fluid valve is an open position, the valve trim apparatus to prevent fluid flow downstream from the valve seat via the first aperture and allow fluid flow downstream from the valve seat via the second aperture when the fluid valve is in a closed position.

2. The apparatus of claim 1 , wherein the cage body includes a plurality of apertures in addition to the first aperture and the second aperture formed through the side wall of the cage body.

3. The apparatus of claim 1 , wherein the first end of the cage body includes a first dimension and the second end of the cage body includes a second dimension different than the first dimension.

4. The apparatus of claim 3 , wherein the first dimension is a first diameter and the second dimension is a second diameter different than the first diameter.

5. The apparatus of claim 1 , wherein the opening is formed via a bore and a counterbore.

6. The apparatus of claim 5 , wherein the valve seat is formed via a stepped surfaced at an interface between the bore and the counterbore.

7. The apparatus of claim 1 , wherein the valve seat is an annular ring positioned on an inner surface of the cage body.

8. The apparatus of claim 1 , wherein the first aperture and the second aperture have longitudinal axes that are non-parallel relative to a longitudinal axis of the opening.

9. The apparatus of claim 1 , wherein the first aperture is upstream from the valve seat and the second aperture is downstream from the valve seat.

10. The apparatus of claim 1 , wherein a first longitudinal axis of the first aperture is offset relative to a second longitudinal axis of the second aperture in a direction along a central axis of the opening.

11. The apparatus of claim 1 , wherein the first aperture has a first length along a first longitudinal axis of the first aperture and the second aperture has a second length along a second longitudinal axis of the second aperture, the first length is less than the second length.

12. A valve comprising:
a valve body defining a fluid flow passageway between an inlet and an outlet, the fluid flow passageway defining an orifice;
a cage positioned in the fluid flow passageway, the cage having a cage body defining an opening and a valve seat positioned in the opening between a first end of the cage body and a second end of the cage body opposite the first end, the cage including a plurality of first apertures through a side wall of the cage body and a plurality of second apertures through the side wall of the cage body, the valve seat positioned between the first apertures and the second apertures; and
a valve plug slidably coupled relative to the cage body and movable between an open position at which the valve plug is spaced away from the valve seat and a closed position at which the valve plug is in sealing engagement with the valve seat, the valve plug to modulate fluid flow through the fluid flow passageway via the first apertures of the cage when the valve plug moves between the open position and the closed position, and the valve plug to prevent fluid flow through the first apertures of the cage when the valve plug is in the closed position and the second apertures to allow fluid flow between the inlet and the outlet of the fluid flow passageway when the valve plug is in the closed position.

13. The valve of claim 12 , wherein the side wall has an inner surface and an outer surface, the inner surface defined by the opening.

14. The valve of claim 13 , wherein each of the first and second apertures has a longitudinal axis that is non-parallel relative to a longitudinal axis of the opening.

15. The valve of claim 14 , wherein the second apertures are positioned downstream from the valve seat and the first apertures are positioned upstream from the valve seat.

16. The valve of claim 12 , wherein the cage body and the valve seat are integrally formed as a unitary structure.

17. The valve of claim 12 , wherein the valve seat is positioned between a midpoint of the cage body and the second end.

18. A valve comprising
means for defining a fluid flow passageway between an inlet and an outlet;
means for characterizing fluid flow positioned in the fluid flow passageway between the inlet and the outlet, the means for characterizing fluid flow having means for sealing, the means for characterizing fluid flow having means for throttling fluid flow positioned upstream from the means for sealing and means for providing constant fluid flow positioned downstream from the means for sealing; and
means for modulating fluid flow to move between an open position and a closed position relative to the means for sealing, the means for modulating fluid flow to allow fluid flow through the means for throttling when the means for modulating is in an open position, the means for modulating fluid flow to prevent fluid flow through the means for throttling when the means for modulating is in the closed position, the means for providing constant fluid flow to allow fluid flow between the inlet and the outlet when the means for modulating is in the closed position.

19. The valve of claim 18 , wherein the means for throttling fluid flow includes at least one of means for reducing cavitation or means for attenuating noise.

20. The valve of claim 18 , wherein the means for providing the constant fluid flow is to fluidly couple the inlet and the outlet when the means for modulating fluid flow is in the closed position relative to the means for sealing.

Assignees

• Fisher Controls Int Llc

Inventors

• Hammond Christopher James
• Stinn Michael Donald

Classifications

• F16K27/02

  of lift valves (for reducing the flow resistance of screw-spindle lift-valves F16K1/06) · CPC title

• F16K47/08

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

• F16K21/02

  providing a continuous small flow · CPC title

• F16K1/52 Primary

  Means for additional adjustment of the rate of flow · CPC title

• F16K3/246 Primary

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