Valve plugs having curved notches

Patent metadata

Field	Value
Publication number	US-10161528-B2
Application number	US-201615184618-A
Country	US
Kind code	B2
Filing date	Jun 16, 2016
Priority date	Jun 6, 2016
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

Valve plugs having curved notches are described herein. An example valve plug includes a first section defining a first end, a second section defining a second end opposite the first end, and a third section located between the first and second sections, the third section including a curved notch formed inwardly from a periphery of the third section toward a longitudinal axis of the valve plug defined by the first, second and third sections.

First claim

What is claimed is:

1. An apparatus, comprising:
a valve body having an inlet and an outlet;
a seat ring positioned within the outlet;
a seat ring retainer positioned within the valve body, the seat ring retainer to retain the seat ring within the outlet, the seat ring retainer having at least one aperture, the at least one aperture to enable a fluid to flow from the inlet through the seat ring retainer, through the seat ring, and toward the outlet; and
a valve plug positioned within the seat ring retainer and slidable between an open position and a closed position relative to the seat ring, the valve plug including:
a first section defining a first end;
a second section defining a second end opposite the first end, the second section to contact the seat ring when the valve plug is in the closed position; and
a third section located between the first and second sections, the third section including a curved notch formed inwardly from a periphery of the third section toward a longitudinal axis of the valve plug defined by the first, second and third sections, the curved notch having an arc-shaped profile in a plane parallel to the longitudinal axis, the arc-shaped profile of the curved notch having a longitudinal span along the longitudinal axis, the longitudinal span of the arc-shaped profile being located outside of and not overlapping a longitudinal span of the seat ring when the valve plug is in the open position, the longitudinal span of the arc-shaped profile being located within the longitudinal span of the seat ring when the valve plug is in the closed position.

2. The apparatus as defined in claim 1 , wherein the curved notch extends completely about the periphery of the third section.

3. The apparatus as defined in claim 1 , wherein the arc-shaped profile is to provide for a sonic flow of a fluid proximate a backside inner wall surface of the valve body.

4. The apparatus as defined in claim 1 , wherein the first section has a cylindrical shape along the longitudinal axis, the second section has a conical shape along the longitudinal axis, and the periphery of the third section has a cylindrical shape along the longitudinal axis, the conical shape of the second section including a base portion located adjacent the third section and a tip portion located opposite the base portion.

5. The apparatus as defined in claim 4 , further including a first circumference defined by the first section, a second circumference defined by the base portion of the second section, a third circumference defined by the tip portion of the second section, a fourth circumference defined by the periphery of the third section, and a fifth circumference defined in part by the curved notch.

6. The apparatus as defined in claim 5 , wherein the first circumference is less than the second circumference.

7. The apparatus as defined in claim 5 , wherein the first circumference is less than the fourth circumference.

8. The apparatus as defined in claim 5 , wherein the second circumference is greater than the third circumference and approximately equal to the fourth circumference.

9. The apparatus as defined in claim 5 , wherein the fifth circumference is less than the fourth circumference and greater than the third circumference.

10. The apparatus as defined in claim 1 , wherein the curved notch extends about only a portion of the periphery of the third section.

11. The apparatus as defined in claim 10 , wherein the curved notch is a first curved notch and the arc-shaped profile is a first profile, and wherein the valve plug further comprises a second curved notch formed inwardly from the periphery of the third section toward the longitudinal axis, the second notch having a second profile in the plane parallel to the longitudinal axis, the first and second curved notches being spaced apart from one another about the periphery of the third section.

12. The apparatus as defined in claim 11 , wherein the first and second profiles are shaped differently relative to one another.

13. The apparatus as defined in claim 12 , wherein the second profile is formed by an inclined line and an arc, the inclined line being formed inwardly from the periphery of the third section toward the longitudinal axis, the arc being curved inwardly from the periphery of the third section toward the longitudinal axis.

14. An apparatus, comprising:
a valve body having an inlet and an outlet;
a seat ring positioned within the outlet;
a seat ring retainer positioned within the valve body, the seat ring retainer to retain the seat ring within the outlet, the seat ring retainer having at least one aperture, the at least one aperture to enable a fluid to flow from the inlet through the seat ring retainer, through the seat ring, and toward the outlet; and
a valve plug positioned within the seat ring retainer and slidable between an open position and a closed position relative to the seat ring, the valve plug including:
a first section defining a first end, the first section having a cylindrical shape;
a second section defining a second end opposite the first end, the second section having a conical shape, the second section to contact the seat ring when the valve plug is in the closed position; and
a third section located between the first and second sections, the third section including a curved notch formed inwardly from a periphery of the third section toward a longitudinal axis of the valve plug defined by the first, second and third sections, the periphery of the third section having a cylindrical shape, the curved notch having an arc-shaped profile in a plane parallel to the longitudinal axis, the conical shape of the second section including a base portion located adjacent the third section and a tip portion located opposite the base portion, the arc-shaped profile of the curved notch having a longitudinal span along the longitudinal axis, the longitudinal span of the arc-shaped profile being located outside of and not overlapping a longitudinal span of the seat ring when the valve plug is in the open position, the longitudinal span of the arc-shaped profile being located within the longitudinal span of the seat ring when the valve plug is in the closed position.

15. The apparatus as defined in claim 14 , wherein the curved notch extends completely about the periphery of the third section.

16. The apparatus as defined in claim 14 , wherein the arc-shaped profile is to provide for a sonic flow of a fluid proximate a backside inner wall surface of the valve body.

17. The apparatus as defined in claim 14 , wherein the curved notch extends about only a portion of the periphery of the third section.

18. The apparatus as defined in claim 17 , wherein the curved notch is a first curved notch and the arc-shaped profile is a first profile, and wherein the valve plug further comprises a second curved notch formed inwardly from the periphery of the third section toward the longitudinal axis, the second notch having a second profile in the plane parallel to the longitudinal axis, the first and second curved notches being spaced apart from one another about the periphery of the third section.

19. The apparatus as defined in claim 18 , wherein the first and second profiles are shaped differently relative to one another.

20. An apparatus, comprising:
a valve body having an inlet and an outlet positioned orthogonally relative to the inlet;
a seat ring positioned within the outlet;
a seat ring retainer positioned within the valve body, the seat ring retainer to retain the seat rin

Assignees

• Fisher Controls Int Llc

Inventors

• Shen Yanning
• Mann Iii Julian Adin

Classifications

• Y10T137/87265

  Dividing into parallel flow paths with recombining · CPC title

• Y10T137/86767

  Spool · CPC title

• F16K3/22

  with sealing faces shaped as surfaces of solids of revolution (F16K13/02 takes precedence; with resilient valve members F16K3/28) · CPC title

• Y10T137/86718

  Dividing into parallel flow paths with recombining · CPC title

• F16K1/38 Primary

  of conical shape · CPC title