Non-rising electric actuated valve operator

• US 8,851,451 B2
• Filed: 03/19/2010
• Issued: 10/07/2014
• Est. Priority Date: 03/23/2009
• Status: Active Grant

• Current Assignee: DeltaValve, LLC (Circor International Incorporated)
• Original Assignee: Curtiss-Wright Flow Control Corporation (Curtiss-Wright Corporation)
• Inventors: Orino, Christopher, Jimenez, Filiberto R.
• Primary Examiner(s): Fristoe, Jr., John K
• Assistant Examiner(s): COLON MORALES, DAVID
• Application Number:
  US12/728,088
• Publication Number:
  US 20110083747A1
• Time in Patent Office: 1,663 Days
• Field of Search: 251/267, 251273-274, 251/268, 251/264, 251/266, 251/326, 137/553
• US Class Current: 251/267
• CPC Class Codes: C10B 25/10 for ovens with vertical chambers
• CPC Class Codes: F16K 3/0254 being operated by particular means
• CPC Class Codes: F16K 31/05 specially adapted for operating hand-operated valves or for combined motor and hand operation
• CPC Class Codes: F16K 31/508 the actuating element being rotatable, non-rising, and driving a non-rotatable axially-sliding element
• CPC Class Codes: Y10T 137/0318 Processes
• CPC Class Codes: Y10T 137/8225 Position or extent of motion indicator

Abstract

The present invention features a coke drum de-heading system. The de-header valve is equipped with a valve body, a gate, a transmission system and an actuator. Actuation of the valve closure functions to open and close the de-header valve.

Claims

1. A valve actuator for opening and closing a gate of a valve comprising:

a support tower having at least one longitudinal groove, each longitudinal groove forming opposing internal surfaces;

a housing assembly having a threaded internal surface and at least one wear block that extends into the at least one longitudinal groove to prevent the housing assembly from rotating, wherein rotation is prevented when the at least one wear block contacts one of the opposing internal surfaces of the at least one longitudinal groove;

a rotating screw comprising a threaded external surface structured to directly engage the threaded internal surface of the housing assembly to axially displace the housing assembly when the rotating screw rotates, wherein when the housing assembly is axially displaced, the at least one wear block slides axially within the at least one longitudinal groove; and

a valve stem coupled at a first end to the housing assembly and coupled at a second end to the gate of the valve.

2. The valve actuator of claim 1, wherein the at least one wear block comprises two wear blocks and the at least one longitudinal groove comprises two longitudinal grooves.

3. The valve actuator of claim 1, wherein each of the at least one wear block extends out through the corresponding longitudinal groove.

4. The valve actuator of claim 1, wherein the support tower is configured to be coupled at one end to an actuator and at another end to the valve.

5. The valve actuator of claim 1, further comprising a coupling system between an electric motor and the rotating screw, comprising double key way slots that provide one or more shear points between the electric motor and the rotating screw.

6. The valve actuator of claim 1, wherein the housing assembly comprises two wear blocks structured to connect to the housing assembly by two lock bolts.

7. The valve actuator of claim 1, wherein the support tower further comprises a valve stem recess comprising a smooth interior surface of the valve stem recess, which is structured to allow the exterior threaded surface of the rotating screw to contact the smooth interior surface of the valve stem recess and move longitudinally inside of the valve stem recess without applying torsional forces to the valve stem.

8. The valve actuator of claim 1, wherein each of the at least one wear block is a separate component that is coupled to the housing assembly by a lock bolt.

9. The valve actuator of claim 8, wherein at least one of the lock bolts further comprises a positional flag that extends out through the corresponding longitudinal groove.

10. The valve actuator of claim 8, wherein the housing assembly comprises a housing coupling to which the at least one wear block is connected, the at least one lock bolt securing the housing coupling to a drive nut forming the threaded internal surface.

11. The valve actuator of claim 1, further comprising an electric actuator for providing rotational force to the rotating screw.

12. The valve actuator of claim 11, wherein the actuator further comprises a manual override, allowing for manual torque to be applied to the rotating screw.

13. The valve actuator of claim 11, further comprising a coupling system between the electric actuator and the rotating screw comprising key way slots that provide one or more shear points between the electric motor and rotating screw.

14. The valve actuator of claim 1, wherein the valve actuator is coupled to a coke drum deheader valve via the support tower.

15. The valve actuator of claim 14, wherein the deheader valve further comprises a valve body and a seat system between which the gate slides.

16. The valve actuator of claim 15, wherein said seat system comprises at least one live loaded dynamic seat.

17. The valve actuator of claim 15, wherein the seat system comprises at least one static seat.

18. The valve actuator of claim 1, wherein the threaded internal surface comprises a drive nut.

19. The valve actuator of claim 18, wherein the housing assembly comprises at least one threaded openings for receiving at least one lock bolt, wherein the at least one lock bolt applies an inward radial force to drive nut.

20. The valve actuator of claim 18, wherein one or more lock bolts extend through the wear block to secure the wear block to the housing assembly.

21. The valve actuator of claim 18, the housing assembly further comprising a housing coupling bolted to the housing assembly utilizing a lock bolt, wherein the lock bolt is structured to apply circumferential force, tightening the drive nut around the threaded external surface of the rotating screw, and wherein the lock bolt is structured to reduce circumferential force applied to the external surface of the drive nut, effectively decreasing how tightly the drive nut retains the threaded external surface of the rotating screw when the lock bolt is loosened.

22. The valve actuator of claim 18, further comprising at least one nut structured to secure the longitudinal relationship of the drive nut to a housing coupling, and at least one lock bolt structured to secure the circumferential pressure applied by the interior of the housing coupling on the drive nut.

23. The valve actuator of claim 18, wherein the housing assembly further comprises a retainer ring operably disposed between the housing assembly and the drive nut.

24. The valve actuator of claim 23, wherein the retainer ring is comprised of one of a ring or two semi circle rings.

25. The valve actuator of claim 23, wherein the housing assembly comprises one or more threaded openings for receiving one or more lock bolts, wherein the one or more lock bolts apply an inward radial force to at least one of the one or more retaining rings.

26. The valve actuator of claim 23, wherein the retainer ring is structured to couple to the valve stem.

27. The valve actuator of claim 26, wherein the retainer ring is structured to prevent torque on the valve stem.

28. The valve actuator of claim 23, wherein the valve stem comprises an external recess for receiving the retaining ring;

and a housing coupling comprises a complimentary interior coupling recess for receiving the retaining ring.

29. The valve actuator of claim 28, wherein the retaining ring is lodged between the external coupling recess of the valve stem and the interior coupling recess of the housing coupling, with the housing assembly binding down on the exterior of the retaining ring, forcing the retaining ring to be retained within the external coupling recess of the valve stem, wherein the retaining ring is structured to communicate longitudinal forces between the housing assembly and the valve stem, while simultaneously preventing translation of torsional forces from the rotating screw to the valve stem.

30. The valve actuator of claim 29, wherein the valve stem comprises multiple external coupling recesses for mechanically engaging multiple retaining rings.

31. A valve actuator for opening and closing a gate of a valve, the valve actuator comprising:

a support tower having a first and a second end, the first end being configured to be connected to a motor, the support tower comprising one or more longitudinal grooves comprising openings with opposing internal surfaces that extend between the first and second ends;

a rotating screw comprising a threaded external surface, the rotating screw structured to rotate within the support tower when a rotational force is applied by the motor;

a housing assembly comprising a drive nut and a wear block, the drive nut comprising a threaded internal surface in direct physical contact with the threaded external surface of the rotating screw that allows the drive nut to travel longitudinally along the rotating screw when the rotating screw rotates, the wear block extending into the one or more longitudinal grooves in the support tower thereby preventing the housing assembly from rotating when the rotating screw is rotated, wherein rotation is prevented when the at least one wear block contacts one of the opposing internal surfaces of the at least one longitudinal groove; and

a valve stem coupled to the drive nut such that the valve stem travels longitudinally with the drive nut, the valve stem comprising a valve stem recess comprising a hollow interior portion of the valve stem, structured to allow the valve stem to travel longitudinally towards the first end of the support tower, while the rotating screw inserts further into the valve stem recess.

32. The valve actuator of claim 31, wherein the valve stem is coupled to the drive nut via a housing coupling.

33. The valve actuator of claim 32, wherein the valve stem and the housing coupling include one or more corresponding coupling recesses into which one or more retaining rings extend.

34. The valve actuator of claim 32, wherein the housing coupling is coupled to the valve stem via a lock bolt.

35. The valve actuator of claim 34, wherein the lock bolt secures the wear block to the housing coupling.

36. The valve actuator of claim 32, wherein the drive nut is coupled to the housing coupling via a plurality of bolts.

37. The valve actuator of claim 31, wherein the housing assembly comprises one or more threaded openings for receiving one or more lock bolts, wherein the one or more lock bolts apply a inward radial force to the drive nut.

38. The valve actuator of claim 33, wherein the housing coupling includes one or more threaded openings for receiving one or more lock bolts, wherein the one or more lock bolts apply a inward radial force to at least one of the one or more retaining rings.

39. A valve actuator for opening and closing a gate of a valve, the valve actuator comprising:

a support tower having a first and a second end, the first end being configured to be connected to a motor, the support tower including comprising one or more longitudinal grooves comprising openings with opposing internal surfaces that extend between the first and second ends;

a rotating screw comprising a threaded external surface, the rotating screw being configured to rotate within the support tower when a rotational force is applied by the motor;

a housing assembly comprising a drive nut, a housing coupling secured to the drive nut, and a wear block secured to the housing coupling, the drive nut comprising a threaded internal surface structured to allow the housing assembly to travel longitudinally along the rotating screw when the rotating screw rotates, the wear block extending into the one or more longitudinal grooves in the support tower thereby preventing the housing assembly from rotating when the rotating screw is rotated wherein rotation is prevented when the at least one wear block contacts one of the opposing internal surfaces of the at least one longitudinal groove; and

a valve stem coupled to the housing assembly such that the valve stem travels longitudinally with the housing assembly, the valve stem comprising a valve stem recess comprising a hollowed out interior portion of the valve stem, wherein the valve stem is coupled to the housing assembly via one or more retaining rings that extend into one or more corresponding coupling recesses formed in the exterior surface of the valve stem and the interior surface of the housing coupling, wherein the housing coupling includes one or more threaded openings for receiving one or more lock bolts, wherein the one or more lock bolts apply an inward radial force to at least one of the one or more retaining rings, wherein as the valve stem travels axially towards the first end of the support tower, the rotating screw inserts further into the valve stem recess.

40. The valve actuator of claim 39, further comprising:

a positional flag attached to a portion of the wear block that extends out through one of the one or more openings, the position flag providing a visual indication of the position of the housing assembly within the support tower.

41. A valve actuator for opening and closing a gate of a valve, the valve actuator comprising:

a support tower having a first and a second end, the first end being configured to be connected to a motor, the support tower including one or more longitudinal grooves comprising openings that extend between the first and second ends;

a rotating screw having a threaded external surface, the rotating screw being configured to rotate within the support tower when a rotational force is applied by the motor;

a housing assembly comprising a drive nut, a housing coupling secured to the drive nut, and a wear block secured to the housing coupling, wherein the housing coupling includes one or more threaded openings for receiving one or more lock bolts, wherein the one or more lock bolts extend through the wear block to secure the wear block to the housing coupling and the one or more lock bolts apply a inward radial force to at least one of the one or more retaining rings, the drive nut having a threaded internal surface that causes the housing assembly to travel axially along the rotating screw when the rotating screw rotates, the wear block extending through the one or more openings in the support tower thereby preventing the housing assembly from rotating when the rotating screw is rotated; and

a valve stem coupled to the housing assembly such that the valve stem travels axially with the housing assembly, the valve stem including a valve stem recess comprising a hollowed out interior portion of the valve stem, wherein the valve stem is coupled to the housing assembly via one or more retaining rings that extend into one or more corresponding coupling recesses formed in the exterior surface of the valve stem and the interior surface of the housing coupling, wherein as the valve stem travels axially towards the first end of the support tower, the rotating screw inserts further into the valve stem recess.

42. The valve actuator of claim 41, further comprising one or more key way slots that provide one or more shear points.

43. The valve actuator of claim 41, wherein the valve actuator is coupled to a coke drum deheader valve via the support tower.

44. The valve actuator of claim 41, wherein the deheader valve further comprises a valve body and a seat system between which the gate slides.

45. The valve actuator of claim 41, wherein said seat system comprises at least one live loaded dynamic seat.

46. The valve actuator of claim 41, wherein the seat system comprises at least one static seat.