Reciprocating pump valve

• US 5,803,122 A
• Filed: 02/14/1997
• Issued: 09/08/1998
• Est. Priority Date: 02/14/1997
• Status: Expired due to Term

• Current Assignee: Parker Intangibles LLC (Parker-Hannifin Corporation)
• Original Assignee: Thomas Theilmeier
• Inventors: Theilmeier, Thomas
• Primary Examiner(s): Ferensic, Denise L.
• Assistant Examiner(s): Kim, Joanne Y.
• Application Number:
  US08/799,245
• Time in Patent Office: 571 Days
• Field of Search: 137/854, 417/571
• US Class Current: 137/854
• CPC Class Codes: F04B 53/1065 fixed at its centre
• CPC Class Codes: Y10T 137/789 Central mount

Abstract

A diaphragm valve for a high speed reciprocating pump includes a valve seat defining at least one channel for fluid to flow through. The channel includes a support disposed therein. A diaphragm extends over the channel and is biased towards a closed position by a raised rim on the valve seat. An indented valve face under the diaphragm is shaped such that the fluid will exert a forward force on an area of the diaphragm which is greater than the cross-sectional area of the channel. The support in the channel supports the diaphragm during the reverse cycle of fluid flow. The valve therefore is durable and consumes a minimal amount of energy.

Claims

1. A diaphragm valve for a high speed reciprocating pump, said valve adapted to allow a fluid to flow through said valve in only a downstream direction, said valve comprising:

a valve seat having an upstream and a downstream side, said valve seat having a valve face indented into said valve seat and surrounded by a rim, at least a portion of said valve face extending into said valve seat at an angle such that said valve face is indented into said valve seat to maximum extent adjacent said rim;

at least one channel defined by said valve seat, said at least one channel intersecting said valve face; and

a diaphragm disposed in said valve seat having an upstream surface facing said valve face, said diaphragm being formed in a generally planar shape, said diaphragm movable between an open and a closed position, said diaphragm fluidly sealed against said rim when said diaphragm is in the closed position, said rim disposed in said valve seat such that said diaphragm is bowed from said generally planar shape and biased towards the closed position.

2. The diaphragm valve of claim 1, wherein said diaphragm is disposed in the downstream side of said valve seat in the center of said valve face.

3. The diaphragm valve of claim 2, wherein said diaphragm is made of neoprene.

4. The diaphragm valve of claim 3, wherein said fluid is a gas.

5. The diaphragm valve of claim 1, wherein said valve face is adapted to allow fluid to act against an area of said upstream surface of said diaphragm which is greater than the cross-sectional area of the at least one channel.

6. The diaphragm valve of claim 1, further comprising a high speed reciprocating pump coupled to said valve.

9. The diaphragm valve of claim 3, wherein said support downstream end is angled at the same angle as said valve face.

10. The diaphragm valve of claims 2, wherein said support is an elongated member having a longitudinal axis, said support longitudinal axis oriented generally parallel to the direction of fluid flow through said channel.

11. The diaphragm valve of claim 10, wherein said support has a downstream end and an upstream end said support downstream end disposed proximate said valve face and said support upstream end coupled to said valve seat and spaced from said valve face.

7. A diaphragm valve for a high speed reciprocating pump, said valve adapted to allow a fluid to flow through said valve in only a downstream direction, said valve comprising:

a valve seat having an upstream and a downstream side, said valve seat having a valve face indented into said valve seat and surrounded by a rim, at least a portion of said valve face extending into said valve seat at an angle such that said valve face is indented into said valve seat to a maximum extent adjacent said rim;

at least one channel defined by said valve seat, said at least one channel intersecting said valve face;

at least one support disposed in said at least one channel; and

a diaphragm disposed in said valve seat having an upstream surface facing said valve face, said diaphragm movable between an open and a closed position, said diaphragm fluidly sealed against said rim when said diaphragm is in the closed position such that said diaphragm is bowed and biased towards the closed position.

8. The diaphragm valve of claim 7, wherein said at least one support includes a downstream end spaced from said diaphragm such that said diaphragm contacts a portion of said support downstream end only when the fluid pressure is greater on the downstream side of said valve seat than the upstream side.

12. The diaphragm valve of claim 7, wherein said valve face has a flat center surface surrounded by an angled conical surface, and said at least one channel intersects said angled conical surface.

13. The diaphragm valve of claim 12, wherein a plurality of channels are disposed in said valve seat and intersect said angled conical surface in a circular fashion.

14. A diaphragm valve for a high speed reciprocating pump, said valve adapted to allow a fluid to flow only in a downstream direction, comprising:

a valve seat having an upstream and a downstream side;

a raised rim on the downstream side of said valve seat defining a valve face surrounded by said raised rim, said valve seat defining a plurality of channels disposed in said valve seat and through said valve face, said channels adapted to allow the fluid to flow therethrough, each said channel having a cross-sectional area;

a plurality of supports disposed axially in said plurality of channels, each said support having a downstream end; and

,

a diaphragm movable between an open and a closed position and disposed on the downstream side of said valve seat over said valve face and said raised rim such that said diaphragm is bowed and biased toward the closed position, said diaphragm having an upstream surface facing said plurality of channels, and said diaphragm disposed in said valve seat such that the area of said upstream surface of said diaphragm in contact with the fluid is greater than the sum of the cross-sectional areas of said plurality of channels.

15. The diaphragm valve of claim 14, wherein said downstream ends of said supports are angled with respect to the downstream side of said valve seat.

16. The diaphragm valve of claim 15, wherein said downstream ends of said supports are spaced from said diaphragm when said valve is in a rest position.

17. The diaphragm valve of claim 16, wherein said supports are disposed in the center of said channels.

18. The diaphragm valve of claim 17, wherein said supports are secured in said channels by a bridge ring secured to said supports upstream from said downstream ends of said supports.

19. The diaphragm valve of claim 14, wherein said valve face has a frusto-conical shape and said downstream ends of said supports are angled to correspond to said frusto-conical shape of said valve face.

20. The diaphragm valve of claim 14, wherein said valve face has a flat center surface surrounded by an angled, conical surface and said channels are arranged in a circle in said angled, conical surface and around said flat center surface.

21. The diaphragm valve of claim 14, wherein said diaphragm is secured to the downstream side of said valve seat in the center of said valve face.

22. The diaphragm valve of claim 14, wherein said fluid is a gas.

23. The diaphragm valve of claim 22, wherein said diaphragm is made of neoprene.

24. The diaphragm valve of claim 14, further comprising a high speed reciprocating pump coupled to said valve.

25. A diaphragm valve for a high speed reciprocating pump, said valve adapted to allow fluid to flow through said valve only in a downstream direction, said valve comprising:

a valve seat having an upstream and a downstream side;

a valve face disposed on said downstream side of said valve seat;

said valve seat defining a raised rim about said valve face;

said valve seat defining a plurality of flow channels therethrough, said flow channels opening through said valve face;

each said flow channel having an elongated diaphragm support disposed axially therein, each said diaphragm support having a downstream end disposed proximate said valve face and an upstream end coupled to said valve seat away from said valve face; and

a diaphragm membrane mounted on said valve seat at said valve face, said diaphragm membrane overlaying said valve face and said raised rim to define a selectively closed position in which said diaphragm membrane bows from said valve face to said raised rim, and a selectively open position in which said diaphragm membrane is spaced from said raised rim, wherein said diaphragm support downstream end prevents said diaphragm membrane from being drawn substantially into said channels.