Monitoring pressure regulating valve off-line detection tool

Abstract

The utility model relates to a monitoring pressure regulating valve off-line detection tool which comprises a gas supply bottle, a gas storage tank A, a gas storage tank B and a gas storage tank C. The top of the gas supply bottle is communicated with one end of a gas supply main pipeline, the other end of the gas supply main pipeline is respectively communicated with one ends of two gas supply branch pipelines, and the two gas supply branch pipelines are respectively provided with a branch block valve. The top of the gas storage tank A is communicated with one end of the upstream pipeline A, and the bottom of the gas storage tank A is communicated with the downstream pipeline A; the top of the gas storage tank B is communicated with one end of the upstream pipeline B, and the bottom of the gas storage tank B is communicated with the downstream pipeline B; the gas storage tank C is communicated with one end of the upstream pipeline C, and the bottom of the gas storage tank C is communicated with the downstream pipeline C. The beneficial effects of the utility model are that through simulating the dynamic working state of the pipeline valve, the function test, detection, maintenance and fault reproduction functions of the pilot valve and the main valve of the monitoring pressure regulating valve are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of valve detection, in particular to an off-line detection tool for monitoring a pressure regulating valve. Background Art

[0002] As an important part of the station field process in the field of pipeline transportation, the pressure regulating skid will lose its pressure regulating function and the circulation of the medium will be interrupted once a failure occurs, which will cause the compressor unit of the compressor station to stop operating or cause huge losses and impacts on the production and life of downstream users of ordinary gas transmission stations. In recent years, pressure regulating valves (such as RMG, Bethel, etc.) have failed and distribution interruptions have occurred frequently due to the increase in service life, lack of maintenance, and poor assembly quality of construction personnel. In the subsequent fault analysis and processing, the random nature of the fault brings a lot of inconvenience to the investigation process. In view of the above-mentioned production and operation status, the pre-installation functional test, offline leakage detection, and fault phenomenon reproduction analysis of the pressure regulating valve are of great significance for the safe and stable operation of gas transmission. Therefore, the offline detection tooling for monitoring the pressure regulating valve is proposed, which can well solve the functional test, detection, maintenance and fault reproduction of the monitoring pressure regulating valve controller and main valve. Current status:

[0003] 1. During production operation, the monitoring pressure regulating valve controller cannot be tested offline before on-site installation after leaving the factory. Whether its function is normal can only be tested online, and there is a lack of dedicated offline testing tooling.

[0004] 2. During production operation, the pressure regulating valve controller can only be monitored online to detect whether its pressure regulating function is sensitive after leaving the factory. During multiple online pressure regulating tests and the testing process, the safety shut-off valve and working pressure regulating valve of the pressure regulating pry need to cooperate with the pressure regulating test. This operation is cumbersome and affects the service life of other equipment.

[0005] 3. When the monitoring pressure regulating valve controller fails, after the controller is repaired, its performance needs to be tested and inspected, and it can only be reinstalled for online testing. If the controller failure is not eliminated, it still needs to be shut down for inspection and then reinstalled for online testing, which results in waste of operating medium and extended maintenance time.

[0006] 4. When a fault occurs in the monitoring pressure regulating valve controller, reproducing the fault phenomenon is one of the common analysis methods. Currently, the fault cannot be reproduced in an offline state, and there is a lack of tooling for offline fault phenomenon reproduction in practice.

[0007] 5. There is a lack of offline test combination tooling for internal leakage test of the pressure regulating valve main valve, main valve action performance and diaphragm test, and load gas circuit tightness test.

[0008] To summarize, the current monitoring of the working status of the pressure regulating valve controller, the working condition of the nozzle baffle, and the detection, testing and troubleshooting of the diaphragm all require online testing to verify their performance, and there is a lack of offline testing tooling; at the same time, there is a lack of offline testing combination tooling for the internal leakage test of the pressure regulating valve main valve, the main valve action performance and diaphragm test, and the load gas path tightness test. Utility Model Content

[0009] The utility model provides an off-line detection tool for monitoring a pressure regulating valve, aiming to solve the problems in the prior art.

[0010] The technical solution of the utility model to solve the above technical problems is as follows:

[0011] A monitoring and off-line detection tool for a pressure regulating valve comprises a gas supply bottle, a gas storage tank A, a gas storage tank B and a gas storage tank C. The top of the gas supply bottle is connected to one end of a gas supply main line, and the other end of the gas supply main line is respectively connected to one end of two gas supply branch lines; the other ends of the two gas supply branch lines are respectively used to connect to the pilot filter element inlet and the main valve of the pressure regulating valve to be detected, and the two gas supply branch lines are respectively installed with branch cut-off valves;

[0012] The top of the gas storage tank A is connected to one end of the upstream pipeline A, and the other end of the upstream pipeline A is used to connect to the feedback pipeline outlet of the controller to be detected, and the bottom of the gas storage tank A is connected to one end of the downstream pipeline A; the top of the gas storage tank B is connected to one end of the upstream pipeline B, and the other end of the upstream pipeline B is used to connect the controller to be detected and the pipeline interface on the low-pressure side of the main valve diaphragm, and the bottom of the gas storage tank B is connected to one end of the downstream pipeline B; the top of the gas storage tank C is connected to one end of the upstream pipeline C, and the other end of the upstream pipeline C is used to connect the controller to be detected and the pipeline interface on the high-pressure side of the main valve diaphragm, and the bottom of the gas storage tank C is connected to one end of the downstream pipeline C; the upstream pipeline A, the downstream pipeline B and the other end of the downstream pipeline C are respectively fixedly installed with downstream shut-off valves.

[0013] The beneficial effects of the utility model are as follows: the pilot performance detection process is as follows: ① Pilot working state detection method: stabilize the gas supply of the gas supply bottle, open the downstream cut-off valve at the bottom of the gas storage tank C to vent, and close the downstream cut-off valves at the bottom of the gas storage tank A and the gas storage tank B. Adjust the pilot 17 to achieve a pressure difference between the gas storage tank B and the gas storage tank A of 0.3Mpa (B>A), indicating that the pilot is working normally, otherwise it is abnormal.

[0014] ② Check the working condition of the pilot nozzle baffle: After the pressure of gas storage tank C stabilizes at the set pressure, close the downstream shut-off valve at the bottom of gas storage tank C and stop venting. At this time, observe whether the pressure of gas storage tank B rises. If it rises, the pilot baffle is working abnormally or is not sealed tightly. If it does not rise, it means that the pilot baffle is normal.

[0015] ③ Detection of pilot diaphragm: Open the downstream shut-off valve at the bottom of gas storage tank C to vent it and adjust the pilot. If the pressure of gas storage tank C can be adjusted, it can be judged that the pilot diaphragm is normal, otherwise it is abnormal.

[0016] The main valve detection process is:

[0017] ① Main valve internal leakage detection method: connect the other end of the corresponding branch gas supply pipeline in the device to the pilot pressure inlet on the upstream flange side of the main valve of the monitoring pressure regulating valve, and seal the upstream flange of the main valve with a blind plate. At this time, detect at the downstream flange of the main valve. If no gas can be detected downstream of the valve, it can be judged that the main valve has no internal leakage, otherwise there is internal leakage.

[0018] ② Main valve performance and diaphragm integrity test: Connect the other end of the corresponding branch air supply pipeline in the device to the downstream cavity pipeline interface of the main valve diaphragm, and pass the gas after adjusting the pressure. At this time, check the main valve action amplitude. If the main valve switches smoothly, it means that the main valve performance and diaphragm are intact.

[0019] ③ Main valve load gas circuit tightness test: Connect the other end of the corresponding branch gas supply pipeline in the device to the pipeline interface of the upstream cavity of the main valve diaphragm, and pass the gas after adjusting the pressure. If there is no leakage at the downstream flange of the main valve, it means that the main valve load gas circuit tightness is intact, otherwise there is a problem with the tightness of the main valve load gas circuit.

[0020] The utility model realizes the function test, detection, maintenance and fault reproduction of the monitoring pressure regulating valve pilot and the main valve by simulating the dynamic working state of the pipeline valve.

[0021] On the basis of the above technical solution, the present invention can also be improved as follows.

[0022] Furthermore, a main shut-off valve is fixedly installed on the main gas supply line.

[0023] The beneficial effects of adopting the above further scheme are simple structure, reasonable setting of the main shut-off valve, and the main shut-off valve can be used to control the on and off of the gas supply from the gas source, which is easy to operate and saves time and effort.

[0024] Further, the main cut-off valve and / or the two branch cut-off valves are respectively solenoid valves.

[0025] The beneficial effect of adopting the above further solution is that the main cut-off valve and the two branch cut-off valves respectively adopt electromagnetic valves, which have a high degree of automation and are more convenient to detect.

[0026] Furthermore, a portion between one end of the downstream pipeline A and the downstream shut-off valve is connected to a portion between one end of the downstream pipeline C and the downstream shut-off valve through a pipeline.

[0027] The beneficial effects of adopting the above further solution are simple structure, reasonable design, and using pipelines to connect the downstream pipeline A and the downstream pipeline C so as to perform corresponding tests on the pilot and the main valve.

[0028] Furthermore, the three downstream cut-off valves are respectively downstream cut-off needle valves.

[0029] The beneficial effect of adopting the above further solution is that the downstream cut-off needle valve has better sealing performance and longer service life.

[0030] Furthermore, each of the downstream shut-off needle valves is a solenoid valve.

[0031] The beneficial effect of adopting the above further solution is that it is more reasonable to use a solenoid valve for the downstream cut-off needle, which has a high degree of automation and is easy to detect.

[0032] Furthermore, pressure detectors are fixedly installed on the upstream pipeline A and / or the upstream pipeline B and / or the upstream pipeline C respectively.

[0033] The beneficial effects of adopting the above further scheme are simple structure and reasonable design. The pressure detector is used to monitor the pressure in the upstream pipeline A, upstream pipeline B and upstream pipeline C in real time during the detection process, so as to detect the pilot and the main valve.

[0034] Furthermore, each of the pressure detectors is a pressure gauge.

[0035] The beneficial effect of adopting the above further solution is that the pressure is detected by using a pressure gauge, which is convenient and has high accuracy.

[0036] Furthermore, each of the pressure detectors is a pressure sensor.

[0037] The beneficial effect of adopting the above further solution is that the pressure is detected by using a pressure sensor, which is convenient, has high accuracy and a wide detection range.

[0038] Furthermore, the gas supply cylinder is a nitrogen cylinder.

[0039] The beneficial effect of adopting the above further solution is that the nitrogen cylinder is easy to supply gas, which facilitates the detection operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0041] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0042] 1. Gas supply cylinder; 2. Gas storage tank A; 3. Gas storage tank B; 4. Gas storage tank C; 5. Gas supply main line; 6. Gas supply branch line; 7. Branch shut-off valve; 8. Upstream pipeline A; 9. Downstream pipeline A; 10. Upstream pipeline B; 11. Downstream pipeline B; 12. Upstream pipeline C; 13. Downstream pipeline C; 14. Downstream shut-off valve; 15. Main shut-off valve; 16. Pressure gauge; 17. Pilot; 18. Main valve. DETAILED DESCRIPTION

[0043] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0044] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0046] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0047] Example 1

[0048] like Figure 1As shown, this embodiment provides an offline detection tool for monitoring a pressure regulating valve, comprising a gas supply bottle 1, a gas storage tank A2, a gas storage tank B3 and a gas storage tank C4, the top of the gas supply bottle 1 is connected to one end of a gas supply main line 5, and the other end of the gas supply main line 5 is respectively connected to one end of two gas supply branch lines 6; the other ends of the two gas supply branch lines 6 are respectively used to connect to the filter element inlet of the controller 17 of the pressure regulating valve to be detected and the main valve 18, and the two gas supply branch lines 6 are respectively installed with branch cut-off valves 7;

[0049] The top of the gas storage tank A2 is connected to one end of the upstream pipeline A8, and the other end of the upstream pipeline A8 is used to connect to the feedback pipeline outlet of the controller 17 to be detected, and the bottom of the gas storage tank A2 is connected to one end of the downstream pipeline A9; the top of the gas storage tank B3 is connected to one end of the upstream pipeline B10, and the other end of the upstream pipeline B10 is used to connect the controller 17 to be detected and the pipeline interface on the low-pressure side of the diaphragm of the main valve 18, and the bottom of the gas storage tank B3 is connected to one end of the downstream pipeline B11; the top of the gas storage tank C4 is connected to one end of the upstream pipeline C12, and the other end of the upstream pipeline C12 is used to connect the controller 17 to be detected and the pipeline interface on the high-pressure side of the diaphragm of the main valve 18, and the bottom of the gas storage tank C4 is connected to one end of the downstream pipeline C13; the upstream pipeline A8, the downstream pipeline B11 and the other end of the downstream pipeline C13 are respectively fixedly installed with downstream shut-off valves 14.

[0050] (1) The pilot performance test process is as follows:

[0051] ① Pilot working status detection method: stabilize the gas supply from the gas supply cylinder, open the downstream cut-off valve 14 at the bottom of the gas storage tank C4 to vent, and close the downstream cut-off valves 14 at the bottom of the gas storage tanks A2 and B3. Adjust the pilot 17 to achieve a pressure difference of 0.3Mpa (B>A) between the pressure of the gas storage tank B and the pressure of the gas storage tank A, indicating that the pilot 17 is working normally, otherwise it is abnormal.

[0052] ② Check the working condition of the pilot nozzle baffle: After the pressure of the gas storage tank C4 stabilizes at the set pressure, close the downstream shut-off valve 14 at the bottom of the gas storage tank C4 and stop venting. At this time, observe whether the pressure of the gas storage tank B3 rises. If it rises, the pilot baffle is working abnormally or is not sealed tightly. If it does not rise, it means that the pilot baffle is normal.

[0053] ③ Detection of the pilot diaphragm: Open the downstream shut-off valve 14 at the bottom of the gas storage tank C4 to vent it, and adjust the pilot 17. If the pressure adjustment of the gas storage tank C4 can be achieved, it can be judged that the pilot diaphragm is normal, otherwise it is abnormal.

[0054] (2) The main valve detection process is:

[0055] ① Main valve internal leakage detection method: connect the other end of the corresponding branch gas supply pipeline in the device to the pilot pressure inlet on the upstream flange side of the monitoring pressure regulating valve main valve 18, and seal the upstream flange of the main valve with a blind plate. At this time, detect at the downstream flange of the main valve. If no gas can be detected downstream of the valve, it can be determined that the main valve has no internal leakage, otherwise there is internal leakage.

[0056] ② Main valve performance and diaphragm integrity test: Connect the other end of the corresponding branch air supply pipeline in the device to the downstream cavity pipeline interface of the main valve diaphragm, and pass the gas after adjusting the pressure. At this time, check the main valve action amplitude. If the main valve switches smoothly, it means that the main valve performance and diaphragm are intact.

[0057] ③ Main valve load gas circuit tightness test: Connect the other end of the corresponding branch gas supply pipeline in the device to the pipeline interface of the upstream cavity of the main valve diaphragm, and pass the gas after adjusting the pressure. If there is no leakage at the downstream flange of the main valve, it means that the main valve load gas circuit tightness is intact, otherwise there is a problem with the tightness of the main valve load gas circuit.

[0058] (3) Fault reproduction process of the voltage regulation system

[0059] According to the fault phenomenon of the pressure regulating system, the fault reproduction in different scenarios can be achieved through the above pilot and main valve testing process.

[0060] Note: The above test method can be used to determine whether there are bubbles in the water passing through the detection port and whether the pressure of the upstream gas storage tank decreases within a certain period.

[0061] It should be noted that the structures of the pilot 17 and the main valve 18 of the above-mentioned pressure regulating valve adopt the existing technology, so their structures and principles are not described in detail here.

[0062] Based on the above scheme, gas storage tank A2, gas storage tank B3 and gas storage tank C4 are three groups of gas cylinders. The number of gas storage tanks in each group of gas cylinders can be a single or multiple containers, such as a single or multiple gas storage tanks A2. The number is not limited as long as the actual pressure requirements are met.

[0063] This embodiment realizes the function test, detection, maintenance and fault reproduction of the pressure regulating valve pilot and the main valve by simulating the dynamic working state of the pipeline valve.

[0064] Example 2

[0065] On the basis of Example 1, in this embodiment, a main shut-off valve 15 is fixedly installed on the main gas supply line 5 .

[0066] The solution has a simple structure, and the main cut-off valve 15 is reasonably arranged. The main cut-off valve 15 can be used to control the on-off of the gas supply from the gas source, which is easy to operate and saves time and effort.

[0067] Example 3

[0068] On the basis of Embodiment 2, in this embodiment, the main cut-off valve 15 and / or the two branch cut-off valves 7 are respectively solenoid valves.

[0069] The main cut-off valve 15 and the two branch cut-off valves 7 are electromagnetic valves, respectively, which have a high degree of automation and are more convenient to detect.

[0070] Alternatively, the main cut-off valve 15 and the two branch cut-off valves 7 may also be manual valves respectively, but manual valves are not as convenient to use as the solenoid valves.

[0071] Example 4

[0072] On the basis of the above embodiments, in this embodiment, the portion between one end of the downstream pipeline A9 and the downstream shut-off valve 14 is connected to the portion between one end of the downstream pipeline C13 and the downstream shut-off valve 14 through a pipeline.

[0073] This solution has a simple structure and a reasonable design. It uses a pipeline to connect the downstream pipeline A9 and the downstream pipeline C13 so as to perform corresponding inspections on the pilot 17 and the main valve 18.

[0074] Example 5

[0075] On the basis of the above embodiments, in this embodiment, the three downstream cut-off valves 14 are respectively downstream cut-off needle valves.

[0076] The downstream shut-off needle valve has better sealing performance and longer service life.

[0077] Example 6

[0078] On the basis of Example 5, in this embodiment, each of the downstream shut-off needle valves is a solenoid valve.

[0079] It is more reasonable to use a solenoid valve for the downstream cut-off needle, which has a high degree of automation and is easy to detect.

[0080] Example 7

[0081] On the basis of the above embodiments, in this embodiment, pressure detectors are fixedly installed on the upstream pipeline A8 and / or the upstream pipeline B10 and / or the upstream pipeline C12, respectively.

[0082] The scheme has a simple structure and a reasonable design. During the detection process, the pressure detector is used to monitor the pressure in the upstream pipeline A8, the upstream pipeline B10 and the upstream pipeline C12 in real time, so as to detect the pilot 17 and the main valve 18.

[0083] Example 8

[0084] Based on Example 7, in this embodiment, each of the pressure detectors is a pressure gauge 16.

[0085] This solution uses a pressure gauge 16 to detect pressure, which is convenient and has high accuracy.

[0086] Example 9

[0087] Based on Example 7, in this embodiment, each of the pressure detectors is a pressure sensor.

[0088] This solution uses a pressure sensor to detect pressure, which is convenient, highly accurate, and has a wide detection range.

[0089] The above-mentioned Embodiment 8 and Embodiment 9 are parallel solutions.

[0090] Based on the above solution, the above-mentioned multiple pressure gauges 16 and multiple pressure sensors are respectively connected to the remote computer for communication, so as to collect corresponding data.

[0091] Alternatively, the plurality of pressure gauges 16 and the plurality of pressure sensors may also be connected to a pressure display installed on site.

[0092] Example 10

[0093] On the basis of the above embodiments, in this embodiment, the gas supply cylinder 1 is a nitrogen cylinder.

[0094] The nitrogen cylinder is convenient for gas supply, which facilitates the detection work.

[0095] It should be noted that an air pump is provided inside the nitrogen cylinder, and the air pump is used to deliver the nitrogen inside the nitrogen cylinder.

[0096] Based on the above scheme, the above-mentioned gas supply cylinder is the gas source, and the gas source supply can be pipeline supply gas, nitrogen cylinder or multiple gas cylinders. It can be selected according to actual conditions. When the gas source pressure is too high, the gas source pressure should be regulated by a pressure reducing valve to reduce the outlet pressure of the gas source supply.

[0097] The working principle of the utility model is as follows:

[0098] (1) The pilot performance test process is as follows:

[0099] ① Pilot working status detection method: stabilize the nitrogen cylinder gas supply, open the downstream cut-off valve 14 at the bottom of the gas storage tank C4 to vent, and close the downstream cut-off valve 14 at the bottom of the gas storage tank A2 and gas storage tank B3. Adjust the pilot 17 to achieve a pressure difference of 0.3Mpa (B>A) between the gas storage tank B and the gas storage tank A, indicating that the pilot 17 is working normally, otherwise it is abnormal.

[0100] ② Check the working condition of the pilot nozzle baffle: After the pressure of the gas storage tank C4 stabilizes at the set pressure, close the downstream shut-off valve 14 at the bottom of the gas storage tank C4 and stop venting. At this time, observe whether the pressure of the gas storage tank B3 rises. If it rises, the pilot baffle is working abnormally or is not sealed tightly. If it does not rise, it means that the pilot baffle is normal.

[0101] ③ Detection of the pilot diaphragm: Open the downstream shut-off valve 14 at the bottom of the gas storage tank C4 to vent it, and adjust the pilot 17. If the pressure adjustment of the gas storage tank C4 can be achieved, it can be judged that the pilot diaphragm is normal, otherwise it is abnormal.

[0102] (2) The main valve detection process is:

[0103] ① Main valve internal leakage detection method: connect the other end of the corresponding branch gas supply pipeline in the device to the pilot pressure inlet on the upstream flange side of the monitoring pressure regulating valve main valve 18, and seal the upstream flange of the main valve with a blind plate. At this time, detect at the downstream flange of the main valve. If no gas can be detected downstream of the valve, it can be determined that the main valve has no internal leakage, otherwise there is internal leakage.

[0104] ② Main valve performance and diaphragm integrity test: Connect the other end of the corresponding branch air supply pipeline in the device to the downstream cavity pipeline interface of the main valve diaphragm, and pass the gas after adjusting the pressure. At this time, check the main valve action amplitude. If the main valve switches smoothly, it means that the main valve performance and diaphragm are intact.

[0105] ③ Main valve load gas circuit tightness test: Connect the other end of the corresponding branch gas supply pipeline in the device to the pipeline interface of the upstream cavity of the main valve diaphragm, and pass the gas after adjusting the pressure. If there is no leakage at the downstream flange of the main valve, it means that the main valve load gas circuit tightness is intact, otherwise there is a problem with the tightness of the main valve load gas circuit.

[0106] (3) Fault reproduction process of the voltage regulation system

[0107] According to the fault phenomenon of the pressure regulating system, the fault reproduction in different scenarios can be achieved through the above pilot and main valve testing process.

[0108] Note: The above test method can be used to determine whether there are bubbles in the water passing through the detection port and whether the pressure of the upstream gas storage tank decreases within a certain period.

[0109] The technical effects achieved by the utility model are as follows:

[0110] 1. The utility model can be used to monitor the working status of the pressure regulating valve pilot.

[0111] 2. The utility model can be used to monitor the working condition of the nozzle baffle of the pressure regulating valve pilot.

[0112] 3. The utility model can be used to monitor the integrity of the diaphragm of the pressure regulating valve pilot.

[0113] 4. The utility model can be used to perform internal leakage test on the main valve of the pressure regulating valve.

[0114] 5. The utility model can be used to test the action performance of the main valve of the pressure regulating valve and the integrity of the diaphragm.

[0115] 6. The utility model can be used to test the tightness of the main valve load gas circuit.

[0116] 7. The utility model can be used to reproduce the fault of the voltage regulating system.

[0117] It should be noted that all electronic components involved in the present invention adopt the existing technology, and the above-mentioned components are electrically connected to the controller, and the control circuit between the controller and each component is the existing technology.

[0118] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0119] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0120] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tool for monitoring an off-line detection of a pressure regulating valve, characterized in that: It comprises a gas supply bottle (1), a gas storage tank A (2), a gas storage tank B (3) and a gas storage tank C (4); the top of the gas supply bottle (1) is connected to one end of a gas supply main line (5); the other end of the gas supply main line (5) is respectively connected to one end of two gas supply branch lines (6); the other ends of the two gas supply branch lines (6) are respectively used to connect to the filter element inlet of the controller (17) of the pressure regulating valve to be tested and the main valve (18), and the two gas supply branch lines (6) are respectively installed with branch shut-off valves (7); The top of the gas storage tank A (2) is connected to one end of the upstream pipeline A (8), and the other end of the upstream pipeline A (8) is used to connect to the feedback pipeline outlet of the pilot to be detected (17). The bottom of the gas storage tank A (2) is connected to one end of the downstream pipeline A (9); the top of the gas storage tank B (3) is connected to one end of the upstream pipeline B (10), and the other end of the upstream pipeline B (10) is used to connect to the pilot to be detected (17) and the low-pressure side pipeline interface of the diaphragm of the main valve (18). The gas storage tank B (3 ) is connected to one end of a downstream pipeline B (11); the top of the gas storage tank C (4) is connected to one end of an upstream pipeline C (12); the other end of the upstream pipeline C (12) is used to connect the pilot to be detected (17) and the main valve (18) diaphragm high-pressure side pipeline interface; the bottom of the gas storage tank C (4) is connected to one end of a downstream pipeline C (13); the upstream pipeline A (8), the downstream pipeline B (11) and the other end of the downstream pipeline C (13) are respectively fixedly installed with downstream shut-off valves (14).

2. The off-line detection tool for monitoring pressure regulating valve according to claim 1 is characterized in that: A main shutoff valve (15) is fixedly installed on the main air supply line (5).

3. The off-line detection tool for monitoring pressure regulating valve according to claim 2 is characterized in that: The main cut-off valve (15) and / or the two branch cut-off valves (7) are solenoid valves respectively.

4. The off-line detection tool for monitoring the pressure regulating valve according to any one of claims 1 to 3, characterized in that: The portion between one end of the downstream pipeline A (9) and the downstream shut-off valve (14) is connected to the portion between one end of the downstream pipeline C (13) and the downstream shut-off valve (14) through a pipeline.

5. The off-line detection tool for monitoring the pressure regulating valve according to any one of claims 1 to 3, characterized in that: The three downstream cut-off valves (14) are respectively downstream cut-off needle valves.

6. The off-line detection tool for monitoring pressure regulating valve according to claim 5 is characterized in that: Each of the downstream shut-off needle valves is a solenoid valve.

7. The off-line detection tool for monitoring pressure regulating valve according to any one of claims 1 to 3, characterized in that: Pressure detectors are fixedly installed on the upstream pipeline A (8) and / or the upstream pipeline B (10) and / or the upstream pipeline C (12), respectively.

8. The off-line detection tool for monitoring pressure regulating valve according to claim 7 is characterized in that: Each of the pressure detectors is a pressure gauge (16).

9. The off-line detection tool for monitoring pressure regulating valve according to claim 7, characterized in that: Each of the pressure detectors is a pressure sensor.

10. The off-line detection tool for monitoring pressure regulating valve according to any one of claims 1 to 3, characterized in that: The gas supply cylinder (1) is a nitrogen cylinder.

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