Methods for monitoring wear in seat materials of valves

• US 6,360,773 B1
• Filed: 05/25/2000
• Issued: 03/26/2002
• Est. Priority Date: 06/21/1999
• Status: Expired due to Fees

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Rhodes, Michael L.
• Primary Examiner(s): RIVELL, JOHN A
• Application Number:
  US09/579,093
• Time in Patent Office: 670 Days
• Field of Search: 137/551, 137/554, 137/559, 251/359, 731/68
• US Class Current: 137/554
• CPC Class Codes: F16K 37/0075 For recording or indicating the functioning of a valve in combination with test equipment
• CPC Class Codes: F16K 37/0083 by measuring valve parameters
• CPC Class Codes: Y10T 137/8242 Electrical
• CPC Class Codes: Y10T 137/8359 Inspection means

Abstract

Systems and methods are discussed that monitor wear in seat materials of a valve. One aspect of the present invention includes a system. The system includes sensors to sense the open/closed status of the valve within a desired range. The system also includes a set of counters to count each time the desired range is adjusted to characterize the valve as having the open/closed status if the valve was not within the desired range. The count of each counter is indicative of wear in seat materials of the valve. Another aspect of the present invention includes a method. The method includes determining an open/closed status of the valve within a desired range, and adjusting adaptively the desired range so as to characterize the valve as having the open/closed status if the valve was not within the desired range. Each iteration of adjusting is indicative of wear in seat materials of the valve.

Claims

1. A system for monitoring wear in seat materials of a valve, comprising:

sensors to sense open/closed status of the valve within a desired range; and

a set of counters to count each time the desired range is adjusted to characterize the valve as having the open/closed status if the valve was not within the desired range, wherein the count of a counter is indicative of wear in seat materials of the valve.

2. The system of claim 1, further comprising a magnetic source coupled to an actuator that is coupled to the valve, wherein the magnet source radiates a magnetic field that is detected by the sensors so as to sense open/closed status of the valve.

3. The system of claim 1, further comprising a microprocessor executing software, wherein the software includes the set of counters, at least one alert level, and at least one alarm level.

4. The system of claim 3, wherein the software issues an alert signal when the count reaches the alert level, and wherein the software issues an alarm signal when the count reaches the alarm level.

5. The system of claim 1, wherein the valve is selected from a group consisting of a single acting valve and a double acting valve.

6. A system for monitoring wear in seat materials of a valve, comprising:

a magnetic source radiating a field that indicates a position of the valve;

sensors to sense open/closed status of the valve within a desired range; and

a set of counters to count each time the desired range is adjusted within a desired limit to characterize the valve as having the open/closed status if the valve was not within the desired range, wherein the count of a counter is indicative of wear in seat materials of the valve.

7. The system of claim 6, further comprising a microprocessor executing software, wherein the software includes the set of counters, wherein the set of counters includes a counter for an open position and a counter for a closed position, wherein the counter for an open position includes an alert level and an alarm level, wherein the counter for a closed position includes an alert level and an alarm level.

8. The system of claim 7, further comprising a setup manager, wherein the setup manager manages an alteration in the alert levels and the alarm levels.

9. The system of claim 8, wherein the setup manager selectively locks the alert levels and the alarm levels to inhibit undesired changes to the alert levels and the alarm levels.

10. The system of claim 9, further comprising a remote control to control the system.

11. A method for monitoring wear in seat materials of a valve, comprising:

determining an open/closed status of the valve within a desired range; and

adjusting adaptively the desired range so as to characterize the valve as having the open/closed status if the valve was not within the desired range, wherein each iteration of adjusting is indicative of wear in seat materials of the valve.

12. The method of claim 11, wherein the desired range includes a first range and a second range, wherein the first range includes a first tolerance having an upper tolerance and a lower tolerance, wherein the second range includes a second tolerance having an upper tolerance and a lower tolerance.

13. The method of claim 12, wherein the act for adjusting is not executed if the valve is within an undesired range.

14. The method of claim 13, wherein the undesired range includes a position that is below the lower tolerance of the first range and above the upper tolerance of the second range.

15. The method of claim 11, wherein the act for adjusting is not executed if the desired range exceeds a desired limit.

16. A method for monitoring wear in seat materials of a valve, comprising:

setting a range of positions indicative of an open/closed status of the valve;

determining the open/closed status of the valve within the range; and

adjusting adaptively the range within a desired limit so as to characterize the valve as having the open/closed status if the valve was not within the range, wherein each iteration of adjusting is indicative of wear in seat materials of the valve.

17. The method of claim 16, wherein setting includes setting a range of positions, wherein the range includes a nominal position and a tolerance.

18. The method of claim 17, wherein setting includes setting a range of positions, wherein the tolerance includes an upper tolerance and a lower tolerance.

19. The method of claim 16, wherein setting includes setting a desired range that includes a first range of positions that indicates that the valve is opened and a second range of positions that indicates that the valve is closed.

20. The method of claim 17, wherein setting includes storing the range in a memory.

21. A method for monitoring wear in seat materials of a valve, comprising:

setting a range of positions indicative of an open/closed status of the valve wherein setting includes setting a range that includes a first range of positions that indicates that the valve is opened and a second range of positions that indicates that the valve is closed;

determining the open/closed status of the valve within the range;

adjusting adaptively the range within a desired limit; and

notifying if the range exceeds the desired limit.

22. The method of claim 21, wherein the first range includes a nominal position having an upper tolerance and a lower tolerance, wherein the second range includes a nominal position having an upper tolerance and a lower tolerance.

23. The method of claim 22, wherein adjusting includes adjusting at least one of the nominal position of the first range and the nominal position of the second range.

24. The method of claim 21, further comprising iterating the act for adjusting, wherein each iteration of adjusting is indicative of wear in seat materials of the valve.

25. of positions indicative of an open/closed status of the valve;

determining the open/closed status of the valve within the desired range;

adjusting adaptively the range within a desired limit;

notifying if the range exceeds the desired limit; and

ceasing valve operations if the range is within an undesired limit.

26. The method of claim 25, wherein the method does not proceed in the order presented.

27. The method of claim 26, wherein notifying includes notifying an operator for valve maintenance.

28. The method of claim 26, wherein notifying includes notifying an operator when the act for ceasing is executed.

29. The method of claim 25, wherein adjusting includes counting to form a count each time the act for adjusting is iterated, wherein the act for notifying is executed when the count exceeds a desired count.

30. A method for monitoring wear in seat materials of a valve, comprising:

setting a range of positions indicative of an open/closed status of the valve;

determining the open/closed status of the valve within the range;

adjusting adaptively the range within a desired limit; and

controlling selectively the act for adjusting.

31. The method of claim 30, wherein the act for controlling is selected from a group consisting of enabling the act for adjusting and disabling the act for adjusting.

32. The method of claim 30, wherein controlling includes allowing the act for adjusting to execute when the open/closed status of the valve is a closed status.

33. The method of claim 30, wherein controlling includes allowing the act for adjusting to execute when the open/closed status of the valve is an opened status.

34. The method of claim 30, wherein controlling includes allowing the act for adjusting to execute when the open/closed status of the valve is either closed or opened.

35. A method for monitoring wear in seat materials of a valve, comprising:

setting a range of positions indicative of an open/closed status of the valve;

determining the open/closed status of the valve within the range;

adjusting adaptively the range within a desired limit; and

stamping the time to form a time stamp at each iteration of adjusting.

36. The method of claim 35, further comprising compiling every time stamp so as to form a history of wear in seat materials of the valve.

37. The method of claim 35, further comprising graphing every time stamp to form a graph so as to enable an analysis of wear in seat materials of the valve.

38. The method of claim 35, further comprising undoing each iteration of adjusting so as to obtain back the range prior to executing the act for adjusting.

39. The method of claim 35, wherein adjusting includes incrementing a count.

40. A method for monitoring wear in seat materials of a valve, comprising:

obtaining a position of the valve;

processing the position that includes adjusting within a range, wherein the processing includes verifying if the position is an open position, wherein verifying includes verifying if the open position is enabled so as to allow processing of the position; and

notifying an operator the wear in seat materials of the valve.

41. The method of claim 40, wherein obtaining includes ascertaining if the position is a valid position.

42. The method of claim 40, wherein verifying includes verifying if the open position is defined.

43. The method of claim 42, wherein verifying includes verifying if the open position is in an alarmed mode.

44. The method of claim 43, wherein processing includes resetting selected variables associated with the open position.

45. The method of claim 44, wherein processing includes determining if the position is within a desired range of the open position, wherein the desired range includes a nominal open position and a tolerance.

46. The method of claim 45, wherein processing includes adjusting the nominal open position so as to characterize the position as an open position.

47. The method of claim 46, wherein processing includes incrementing a count that is indicative of wear in seat materials of the valve.

48. The method of claim 47, wherein processing includes checking if the count exceeds an alert level so as to execute the act for notifying.

49. The method of claim 48, wherein processing includes checking if the count exceeds an alarm level so as to execute the act for notifying.

50. The method of claim 40, wherein processing includes verifying if the position is a closed position, wherein verifying includes verifying if the closed position is enabled so as to allow processing of the position.

51. The method of claim 50, wherein verifying includes verifying if the closed position is defined.

52. The method of claim 51, wherein verifying includes verifying if the closed position is in an alarmed mode.

53. The method of claim 52, wherein processing includes resetting selected variables associated with the closed position.

54. The method of claim 53, wherein processing includes determining if the position is within a desired range of the closed position, wherein the desired range includes a nominal closed position and a tolerance.

55. The method of claim 54, wherein processing includes adjusting the nominal closed position so as to characterize the position as a closed position.

56. The method of claim 55, wherein processing includes incrementing a count that is indicative of wear in seat materials of the valve.

57. The method of claim 56, wherein processing includes checking if the count exceeds an alert level so as to execute the act for notifying.

58. The method of claim 57, wherein processing includes checking if the count exceeds an alarm level so as to execute the act for notifying.