Self-Testing Combustible Gas and Hydrogen Sulfide Detection Apparatus

• US 20130031953A1
• Filed: 08/04/2011
• Published: 02/07/2013
• Est. Priority Date: 08/04/2011
• Status: Active Grant

• Current Assignee: Saudi Arabian Oil Company (Government of Saudi Arabia)
• Original Assignee: Aramco Services Company (Government of Saudi Arabia)
• Inventors: Flanders, Patrick S.
• Granted Patent: US 9,110,041 B2
• Time in Patent Office: Days
• US Class Current: 73/23.31
• CPC Class Codes: G01N 33/0006 Calibrating gas analysers
• CPC Class Codes: G01N 33/004 for CO, CO2
• CPC Class Codes: G01N 33/0044 for H2S, sulfides
• CPC Class Codes: G01N 33/007 Arrangements to check the analyser calibrating G01N33/0006

Abstract

An automated testing apparatus for remotely performing a testing sequence to ensure that a sensor is functioning. The apparatus can include a detector, a storage container, a burst valve in fluid communication with the storage container, a testing control module in communication with the storage container and the burst valve, and a remote user interface remotely located from the detector. Preferably, the automated testing apparatus can simplify the testing procedure, increase the frequency of sensor testings, thereby notifying operations of sensor failures in a more timely fashion without the need for an operator to check the sensor locally.

Claims

1. An automated testing apparatus for detection of a chemical substance, the apparatus comprising:

(a) a detector having a sensor operable to detect the presence of a chemical substance;

(b) a storage container for storing a testing material;

(c) a burst valve assembly in fluid communication with the storage container, the burst valve assembly comprising a burst valve, the burst valve operable to control an amount of the testing material releasable from the storage container through the burst valve assembly such that the burst valve assembly is operable to deliver a quantity of the testing material through the burst valve assembly, the burst valve assembly being positioned in relation to the sensor such that the burst valve assembly is operable to deliver the quantity of testing material in close proximity to the sensor, such that the testing material can be detected by the sensor;

(d) a testing control module in communication with the burst valve assembly, and the detector the testing control module operable to provide a signal to activate the burst valve and to initiate flow of the testing material from the storage container through the burst valve assembly; and

(e) a remote user interface remotely located from the detector, the remote user interface in communication with the testing control module, wherein the remote user interface is operable to receive a detection signal from the testing control module and output a discernable signal that is operable to indicate whether the sensor is functioning.

2. The automated testing apparatus as claimed in claim 1, wherein the remote user interface comprises:

an input/output device operable to interact with a user;

a computer defining a signal processing device having non-transitory computer memory, the computer in electronic communication with the input/output device and the testing control module, the signal processing device operable to receive and transmit instructions between the input/output device and the testing control module;

a program product stored in memory and operable on the signal processing device, the program product in electronic communication with the signal processing device, the program product composed of instructions executable for initiating a testing sequence, wherein the testing sequence includes the steps of;

delivering the testing material through the burst valve assembly in close proximity to the sensor;

sensing the presence of the testing material by the sensor; and

receiving a signal from the sensor to the testing control module indicating whether the sensor detected the presence of the testing material.

3. The automated testing apparatus as claimed in claim 2, wherein the testing control module is operable to store diagnostic data from the testing sequence, wherein the diagnostic data includes timestamps for each testing sequence conducted and testing sequence results.

4. The automated testing apparatus as claimed in claim 3, wherein the diagnostic data further includes length of time between receipt of a test result from the sensor and occurrence of a designated response, wherein the test result indicates a failure of the sensor to detect the presence of the testing material.

5. The automated testing apparatus as claimed in claim 3, wherein the diagnostic data further includes sensor degradation and remaining sensor life.

6. The automated testing apparatus as claimed in claim 1, wherein the remote user interface is located within a control room, such that the remote user interface can be accessed in a location away from the chemical substance.

7. The automated testing apparatus as claimed in claim 1, wherein the chemical substance is selected from the group consisting of a combustible gas, hydrogen sulfide, carbon monoxide, and combinations thereof.

8. The automated testing apparatus as claimed in claim 1, wherein the testing material is a gas when released at atmospheric conditions.

9. The automated testing apparatus as claimed in claim 1, wherein the testing material is selected from the group consisting of a combustible gas, hydrogen sulfide, carbon monoxide, and combinations thereof.

10. The automated testing apparatus as claimed in claim 1, further comprising:

means for measuring the pressure of the testing material within the storage container; and

means for calculating the amount of testing material flowing through the burst valve assembly based on the amount of time the burst valve is in an open position and the pressure difference of the storage container between a closed position and the open position of the burst valve.

11. The automated testing apparatus as claimed in claim 1, wherein the testing control module further comprises a pressure monitoring system in communication with the burst valve assembly, wherein the pressure monitoring system is operable to monitor the pressure of the storage container.

12. The automated testing apparatus as claimed in claim 11, wherein the pressure monitoring system is in pneumatic communication with the burst valve assembly.

13. The automated testing apparatus as claimed in claim 1, further comprising a means for determining the amount of testing material within the storage container.

14. The automated testing apparatus as claimed in claim 1, wherein the testing control module further comprises internal memory, wherein the internal memory is operable to store diagnostic data.

15. The automated testing apparatus as claimed in claim 14, wherein the diagnostic data includes timestamps for each testing sequence conducted, testing sequence results, and length of time between receipt of a test result from the sensor and occurrence of a designated response, wherein the test result indicates a failure of the sensor to detect the presence of the testing material.

16. The automated testing apparatus as claimed in claim 14, wherein the diagnostic data further includes sensor degradation and remaining sensor life.

17. The automated testing apparatus as claimed in claim 14, further comprising a means for protecting the internal memory from dangerous conditions proximate to the sensor.

18. The automated testing apparatus as claimed in claim 1, wherein the detector is selected from the group consisting of a solid-state diffusion adsorption detector, a catalytic bead-type diffusion detector, a smoke detector, a carbon monoxide detector, or an infra-red detector.

19. The automated testing apparatus as claimed in claim 1, further comprising a user interface panel in communication with the testing control module, the user interface panel operable to allow manual operation of the testing control module.

20. The automated testing apparatus as claimed in claim 19, wherein the user interface panel is located in a non-hazardous location remote from the testing control module.

21. The automated testing apparatus as claimed in claim 19, wherein the user interface panel is proximate to the testing control module.

22. The automated testing apparatus as claimed in claim 19, wherein the user interface panel comprises a local test function switch that is operable to initiate a testing sequence for the automated testing apparatus.

23. The automated testing apparatus as claimed in claim 19, wherein the user interface panel further comprises an indicator, wherein the indicator is selected from the group consisting of a failed test indicator, warning condition indicator, critical condition indicator, or combinations thereof.

24. The automated testing apparatus as claimed in claim 1, wherein the burst valve assembly is operable to deliver the testing material to the sensor without a pump or compressed air supply.

25. The automated testing apparatus as claimed in claim 1, further comprising a sensor diffuser, wherein the sensor is disposed within the sensor diffuser, the sensor diffuser having a plurality of openings, the plurality of openings being operable to allow for air to flow through the sensor diffuser.

26. The automated testing apparatus as claimed in claim 1, wherein the burst valve includes a three-way valve, such that the testing control module is in fluid communication with the burst valve.

27. The automated testing apparatus as claimed in claim 1, further comprising a TCM-burst valve line in communication with the testing control module and the burst valve assembly, the TCM-burst valve line operable to send a signal from the testing control module to the burst valve assembly to change a state of the burst valve. [we recommend leaving as is—

there needs to be some sort of mechanism for the TCM to send a signal to the valve in order to close.]

28. The automated testing apparatus as claimed in claim 1, further comprising a supplemental storage container in fluid communication with the storage container and the burst valve assembly, the supplemental storage container operable to reduce the pressure exerted on the burst valve assembly due to the testing material.

29. The automated testing apparatus as claimed in claim 28, wherein the supplemental storage container has an internal volume greater than the internal volume of the storage container.

30. The automated testing apparatus as claimed in claim 28, further comprising a field connector, wherein the supplemental storage container further comprises outer threads and a seat, the field connector having inner threads that are operable to engage the outer threads on the supplemental storage container, such that when the inner threads engage with the outer threads, a threaded connection is formed between supplemental storage container and the field connector, wherein the threaded connection is operable to cause a downward force to be exerted on the storage container, such that the storage container engages with the seat and forms the fluid communication with the supplemental storage container.