Pressure maintaining and leakage detecting system and equipment for transformer oil chromatographic monitoring device

Abstract

The application discloses a kind of transformer oil chromatographic monitoring device pressure maintaining leak detection system and equipment, it is related to leak detection device technical field, wherein, pressure maintaining leak detection system includes power module, detection module and three control modules;Detection module includes carrier gas generator, first detection component, second detection component and third detection component;First detection component includes first detection pipeline, first pressure sensor and first electric valve group, and first pressure sensor is arranged on first detection pipeline for detecting the pressure in gas path module;Second detection component includes second detection pipeline, second pressure sensor and second electric valve group, and second pressure sensor is arranged on chromatographic detection module for detecting the pressure in chromatographic detection module;Third detection component includes third pressure sensor and bipolar pump, and third pressure sensor is arranged on degassing module for detecting the pressure of degassing module.The leak detection efficiency of the application is higher.

Description

Technical Field

[0001] This invention relates to the field of leak detection device technology, and in particular to a pressure-holding leak detection system and equipment for transformer oil chromatography monitoring. Background Technology

[0002] Transformer oil chromatography monitoring devices are mainly used to detect and measure trace amounts of fault gases (acetylene, methane, carbon monoxide, etc.) in oil-immersed transformer oil. This allows for early warning of potential equipment failures, preventing sudden accidents and improving the safety and reliability of power operations. The oil chromatography monitoring device consists of a carrier gas module, a degassing module, a gas path module, and a chromatography detection module. The degassing module is directly connected to the transformer body or return oil pipeline via an oil pump, introducing transformer oil into it. The degassing module then sends the separated gases from the introduced oil to the gas path module, which in turn sends the gases to the chromatography detection module. The chromatography detection module separates various characteristic gases and uses gas sensors to detect their component content.

[0003] Currently, transformer oil chromatography monitoring devices require leak testing of the entire device before leaving the factory. The degassing module, gas path module, and chromatography detection module all require separate gas pressure holding leak testing. Existing leak detection devices can generally only test one of the modules at a time, resulting in low leak detection efficiency. Summary of the Invention

[0004] The main objective of this invention is to propose a pressure-holding leak detection system and equipment for transformer oil chromatography monitoring, aiming to solve the technical problem of low leak detection efficiency in existing leak detection devices.

[0005] To achieve the above objectives, this invention proposes a pressure-holding leak detection system for a transformer oil chromatography monitoring device. The oil chromatography monitoring device includes a carrier gas module, a degassing module, a gas path module, and a chromatography detection module. The degassing module, gas path module, and chromatography detection module all have inlets and outlets. The pressure-holding leak detection system includes: Power module; There are three control modules, all of which are electrically connected to the power supply module. The three control modules are the first control module, the second control module, and the third control module. The detection module includes a carrier gas generator, a first detection component, a second detection component, and a third detection component. The first detection component includes a first detection pipeline, a first pressure sensor, and a first electric valve assembly. The two ends of the first detection pipeline are connected to the inlet of the gas path module and the carrier gas generator, respectively. The first electric valve assembly is disposed on the first detection pipeline. The first pressure sensor is disposed on the first detection pipeline for detecting the pressure in the gas path module. The first pressure sensor is located between the first electric valve assembly and the gas path module. Both the first pressure sensor and the first electric valve assembly are electrically connected to the first control module. The second detection component includes a second detection pipeline, a second pressure sensor, and a second electric valve assembly. The two ends of the second detection pipeline are connected to the inlet of the chromatography detection module and the carrier gas generator, respectively. The second electric valve assembly is installed on the second detection pipeline. The second pressure sensor is installed on the chromatography detection module to detect the pressure inside the chromatography detection module. Both the second pressure sensor and the second electric valve assembly are electrically connected to the second control module. The third detection component includes a third pressure sensor and a bipolar pump. The third pressure sensor is installed on the degassing module to detect the pressure of the degassing module, and the bipolar pump is installed at the inlet of the degassing module. Both the third pressure sensor and the bipolar pump are electrically connected to the third control module.

[0006] In one embodiment, a first check valve and a second check valve are respectively provided on the first detection pipeline and the second detection pipeline; wherein, the first check valve is located between the first electric valve group and the air circuit module, and the second check valve is located between the second electric valve group and the second pressure sensor.

[0007] In one embodiment, the first electric valve assembly includes a first solenoid valve and two second solenoid valves; the first detection pipeline includes a main line and two branches, one end of the main line is connected to the carrier gas generator, one end of each of the two branches is connected to the other end of the main line, and the ends of the two branches away from the main line are respectively used to connect to two gas circuit modules, and a first pressure sensor is provided on each of the two branches; the first solenoid valve is provided on the main line, the two second solenoid valves are respectively provided on the two branches, and a first check valve is provided on each of the two branches.

[0008] In one embodiment, the gas path module has two inlets and two outlets. The two inlets are a first inlet and a second inlet, respectively. The first inlet is used to communicate with the carrier gas module, and the second inlet is used to communicate with the outlet of the degassing module. The two outlets are a first outlet and a second outlet, respectively, which are used to communicate with the inlet and outlet of the chromatographic detection module. The first detection component also includes a third solenoid valve, a fourth solenoid valve, and a fifth solenoid valve that are electrically connected to the control module. The third solenoid valve, the fourth solenoid valve, and the fifth solenoid valve are respectively used to communicate with the air inlet, the first air outlet, and the second air outlet.

[0009] In one embodiment, the second electric valve assembly includes a sixth solenoid valve and two seventh solenoid valves; the second detection pipeline includes a main line and two branch lines, one end of the main line is connected to the carrier gas generator, one end of each of the two branch lines is connected to the other end of the main line, and the ends of the two branch lines away from the main line are respectively connected to two chromatographic detection modules; the seventh solenoid valve is disposed on the main line, and the two seventh solenoid valves are respectively disposed on the two branch lines, and each branch line is provided with a second check valve.

[0010] In one embodiment, the degassing module has one inlet and two outlets, the inlet being an oil inlet and the two outlets being an oil outlet and an exhaust outlet for communicating with the inlet of the gas circuit module, respectively. The third detection component also includes a third electric valve group electrically connected to the third control module. The third electric valve group includes an eighth solenoid valve, a ninth solenoid valve, and a tenth solenoid valve. The oil inlet, oil outlet, and exhaust port are respectively connected to the eighth solenoid valve, the ninth solenoid valve, and the tenth solenoid valve.

[0011] In one embodiment, the pressure-holding leak detection system further includes a host computer, which is electrically connected to the power module, and each detection module is electrically connected to the host computer.

[0012] In one embodiment, the pressure-holding leak detection system further includes three alarms, and the three alarms are electrically connected to three control modules respectively.

[0013] In one embodiment, each alarm is a buzzer and / or a warning light.

[0014] The present invention also proposes a pressure-holding leak detection device, which uses the pressure-holding leak detection system of the transformer oil chromatography monitoring device described above.

[0015] The transformer oil chromatography monitoring device of the present invention uses a pressure-holding leak detection system. A power supply module powers the detection module and three control modules. The detection module includes a carrier gas generator, a first detection component, a second detection component, and a third detection component. The first detection component's first detection line is connected to both the gas path module and the carrier gas generator. Air can be injected into the gas path module through the carrier gas generator to increase its internal pressure. After a certain period, the reading of the first pressure sensor indicates whether the gas pressure module is leaking. The second detection component's second detection line is connected to both the chromatography detection module and the carrier gas generator. Air can also be injected into the chromatography detection module through the carrier gas generator to increase its internal pressure. After a certain period, the reading of the second pressure sensor indicates whether the chromatography detection module is leaking. The second detection component includes a third pressure sensor. The degassing module is used to extract transformer oil and separate gases from it. Therefore, it has a bipolar pump for oil extraction. The bipolar pump extracts gas from the degassing module, putting it under negative pressure. The reading of the third pressure sensor indicates whether the degassing module is leaking. Therefore, the transformer oil chromatography monitoring device pressure-holding leak detection system of the present invention can simultaneously detect leaks in the degassing module, gas path module and chromatography detection module, and has good versatility and higher efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a structural block diagram of a pressure-holding leak detection system provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the gas path connection between the carrier gas generator and the first and second detection components in a pressure-holding leak detection system provided in an embodiment of the present invention. Figure 3 This is a schematic diagram of the gas path connection between the carrier gas generator and the second detection component and the chromatographic detection module in a pressure-holding leak detection system provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the air circuit connection between the carrier gas generator and the first detection component and the air circuit module in a pressure-holding leak detection system provided in an embodiment of the present invention. Figure 5 This is a schematic diagram of the structure of a pressure-holding and leak-detecting device provided in an embodiment of the present invention.

[0018] Explanation of icon numbers: 100. Pressure Holding and Leak Detection System; 1. Power Module; 2a. First Control Module; 2b. Second Control Module; 2c. Third Control Module; 3. First Detection Component; 31. First Electric Valve Assembly; 311. First Solenoid Valve; 312. Second Solenoid Valve; 32. First Detection Pipeline; 33. First Check Valve; 34. Third Solenoid Valve; 35. Fourth Solenoid Valve; 36. Fifth Solenoid Valve; 37. First Pressure Sensor; 4. Second Detection Component; 41. Second Electric Valve Assembly; 411. Sixth Solenoid Valve; 412. Seventh Solenoid Valve; 42. Second Detection Pipeline; 43. Second Check Valve; 44. Second Pressure Sensor; 5. Third Detection Component; 6. Carrier Gas Generator; 7. Alarm; 8. Host Computer; 200. Gas path module; 300. Chromatography detection module; 400. Pressure holding and leak detection equipment; 401. Cabinet; 402. Installation space; 403. Casters.

[0019] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0023] This invention proposes a pressure-holding leak detection system 100 for a transformer oil chromatography monitoring device.

[0024] Please see Figures 1 to 4 In one embodiment of the present invention, the oil chromatography monitoring device includes a carrier gas module, a degassing module, a gas path module 200, and a chromatography detection module 300. The degassing module, the gas path module 200, and the chromatography detection module 300 all have an inlet and an outlet.

[0025] The pressure-holding leak detection system 100 includes a power module 1, a detection module, and three control modules, all electrically connected to the power module 1. The three control modules are designated as a first control module 2a, a second control module 2b, and a third control module 2c. The detection module includes a carrier gas generator 6, a first detection component 3, a second detection component 4, and a third detection component 5. The first detection component 3 includes a first detection pipeline 32, a first pressure sensor 37, and a first electric valve assembly 31. The two ends of the first detection pipeline 32 are connected to the inlet of the gas path module 200 and the carrier gas generator 6, respectively. The first electric valve assembly 31 is mounted on the first detection pipeline 32. The first pressure sensor 37 is mounted on the first detection pipeline 32 to detect the pressure within the gas path module 200, and is located between the first electric valve assembly 31 and the gas path module 200. Force sensor 37 and first electric valve group 31 are both electrically connected to first control module 2a; second detection component 4 includes second detection pipeline 42, second pressure sensor 44 and second electric valve group 41. The two ends of second detection pipeline 42 are respectively connected to the inlet of chromatographic detection module 300 and carrier gas generator 6. Second electric valve group 41 is disposed on second detection pipeline 42. Second pressure sensor 44 is disposed on chromatographic detection module 300 for detecting pressure inside chromatographic detection module 300. Second pressure sensor 44 and second electric valve group 41 are both electrically connected to second control module 2b; third detection component 5 includes third pressure sensor and bipolar pump. Third pressure sensor is disposed on degassing module for detecting pressure in degassing module. Bipolar pump is disposed at inlet of degassing module. Third pressure sensor and bipolar pump are both electrically connected to third control module 2c.

[0026] The transformer oil chromatography monitoring device of the present invention uses a pressure-holding leak detection system 100. A power supply module 1 supplies power to the detection module and three control modules. The detection module includes a carrier gas generator 6, a first detection component 3, a second detection component 4, and a third detection component 5. The first detection component 3's first detection line 32 is connected to the gas path module 200 and the carrier gas generator 6. Air can be injected into the gas path module 200 through the carrier gas generator 6 to increase the internal pressure. After a certain period, the reading of the first pressure sensor 37 can be used to determine whether the gas pressure module is leaking. The second detection line 42 of the second detection component 4 is connected to the colorimeter... The chromatographic detection module 300 is connected to the carrier gas generator 6. Air can be injected into the chromatographic detection module 300 through the carrier gas generator 6 to increase its internal pressure. After a certain period, the reading of the second pressure sensor 44 is read to determine if the chromatographic detection module 300 is leaking. The second detection component 4 includes a third pressure sensor. Understandably, the degassing module is used to extract transformer oil and separate the gas from it. Therefore, it originally has a bipolar pump for oil extraction. The bipolar pump extracts the gas from the degassing module, thus placing the degassing module under negative pressure. After a certain period, the reading of the third pressure sensor is read to determine if the degassing module is leaking. Therefore, the transformer oil chromatographic monitoring device pressure-maintaining leak detection system 100 of the present invention can simultaneously detect leaks in the degassing module, the gas path module 200, and the chromatographic detection module 300, offering good versatility and higher efficiency.

[0027] Furthermore, the three control modules control the first detection component 3, the second detection component 4, and the third detection component 5 respectively, making operation more convenient.

[0028] Understandably, when leak detection of the gas circuit module 200 is required, the inlet of the gas circuit module 200 is first connected to the first connecting pipe, and the outlet of the gas circuit module 200 is blocked. Specifically, this can be done by installing a valve or a blocking structure at the outlet. The first control module 2a controls the opening and closing of the first electric valve group 31, thereby opening or blocking the first detection pipeline 32. When the first detection pipeline 32 is open, the carrier gas generator 6 injects air into the gas circuit module 200 through the first detection pipeline 32 and the first connecting pipe, thereby increasing the air pressure inside the gas circuit module 200. At the same time, the first pressure sensor 37 is used to sense the air pressure inside the gas circuit module 200. After the air pressure inside the gas circuit module 200 increases to a suitable level, the first control module 2a controls the first electric valve group 31 to close the first detection pipeline 32 and maintain the air pressure of the gas circuit module 200 for a certain period of time. After a certain period of time, the reading of the first pressure sensor 37 is read to determine whether the air pressure has decreased. If it has decreased, it indicates that the gas circuit module 200 is leaking.

[0029] When leak detection of the chromatography detection module 300 is required, first connect the inlet and the second connecting pipe of the chromatography detection module 300, and then seal the outlet of the chromatography detection module 300. Specifically, this can be done by installing a valve or a sealing structure at the outlet. The second control module 2b controls the opening and closing of the second electric valve group 41, thereby opening or closing the second detection pipeline 42. When the second detection pipeline 42 is open, the carrier gas generator 6 injects air into the chromatography detection module 300 through the second detection pipeline 42 and the second connecting pipe, increasing the gas pressure inside the chromatography detection module 300. The second pressure sensor 44 senses the gas pressure inside the chromatography detection module 300. After the gas pressure inside the chromatography detection module 300 increases to a suitable level, the second control module 2b controls the second electric valve group 41 to close the second detection pipeline 42 and maintain the gas pressure of the chromatography detection module 300 for a certain period of time. After a certain period of time, the reading of the second pressure sensor 44 is read to determine whether the gas pressure has decreased. If it has decreased, it indicates that the chromatography detection module 300 is leaking.

[0030] It should be noted that when a pressure sensor is already installed on the gas path module 200, the pressure sensor installed on the gas path module 200 shall be used as the first pressure sensor 37; when a pressure sensor is already installed on the degassing module, the pressure sensor installed on the degassing module shall be used as the third pressure sensor.

[0031] It should be noted that the control module can use existing technology to control the first electric valve group 31 and the second electric valve group 41, and the control module can also use existing technology to control the first pressure sensor 37, the second pressure sensor 44 and the third pressure sensor and the interaction between them.

[0032] In one embodiment, a first check valve 33 and a second check valve 43 are respectively provided on the first detection pipeline 32 and the second detection pipeline 42; wherein, the first check valve 33 is located between the first electric valve group 31 and the first pressure sensor 37, and the second check valve 43 is located between the second electric valve group 41 and the second pressure sensor 44.

[0033] Furthermore, by setting a first check valve 33 in the first detection pipeline 32, the first check valve 33 ensures that the gas in the first detection pipeline 32 can only flow in one direction, avoiding the gas from flowing in the opposite direction after the gas pressure of the gas circuit module 200 increases; similarly, a second check valve 43 is set on the second detection pipeline 42 to ensure that the gas in the second detection pipeline 42 can only flow in one direction.

[0034] In one embodiment, the first electric valve assembly 31 includes a first solenoid valve 311 and two second solenoid valves 312; the first detection pipeline 32 includes a main pipeline and two branch pipelines, one end of the main pipeline is connected to the carrier gas generator 6, one end of each of the two branch pipelines is connected to the other end of the main pipeline, and the ends of the two branch pipelines away from the main pipeline are respectively used to connect to two gas circuit modules 200, and a first pressure sensor 37 is provided on each of the two branch pipelines; the first solenoid valve 311 is provided on the main pipeline, the two second solenoid valves 312 are respectively provided on the two branch pipelines, and a first check valve 33 is provided on each of the two branch pipelines.

[0035] The first detection pipeline 32 includes a main pipeline and two branch pipelines. The main pipeline is connected to the carrier gas generator 6, and both branch pipelines are connected to the main pipeline. The two branch pipelines can be used to connect to two gas circuit modules 200 simultaneously, thereby simultaneously detecting leaks in both gas circuit modules 200. Furthermore, solenoid valves are installed on both the main pipeline and the two branch pipelines. Understandably, when only a single gas circuit module 200 needs to be detected for leaks, the gas circuit module 200 is connected to any first connecting pipe, and the first solenoid valve 311 of the main pipeline is opened through the first control module 2a, and the second solenoid valve 312 of the corresponding branch pipeline is opened, so that the airflow can only enter the gas circuit module 200 through the main pipeline and the corresponding branch pipeline. When it is necessary to detect leaks in both gas circuit modules 200 simultaneously, the first solenoid valve 311 of the main pipeline is opened through the first control module 2a, and both second solenoid valves 312 are opened. After the pressure readings of the two first pressure sensors 37 are at appropriate levels, both second solenoid valves 312 are closed first, and then the first solenoid valve 311 is closed.

[0036] In one embodiment, the gas path module 200 has two inlets and two outlets. The two inlets are a first inlet and a second inlet, respectively. The first inlet is used to communicate with the carrier gas module, and the second inlet is used to communicate with the outlet of the degassing module. The two outlets are a first outlet and a second outlet, respectively, which are used to communicate with the inlet and outlet of the chromatographic detection module 300. The first detection component 3 also includes a third solenoid valve 34, a fourth solenoid valve 35, and a fifth solenoid valve 36 electrically connected to the control module. The third solenoid valve 34, the fourth solenoid valve 35, and the fifth solenoid valve 36 are used to communicate with the inlet, the first outlet, and the second outlet, respectively.

[0037] Understandably, the gas circuit module 200 includes a six-way valve, which is mainly used to take an appropriate amount of gas and send it into the chromatography detection module 300 during subsequent transformer oil chromatography monitoring. The six-way valve has six ports, two of which are connected to the metering tube, and the remaining four ports are provided with two inlets and two outlets.

[0038] The first air inlet, which is connected to the carrier gas module, is connected to the first connecting pipe. Air is injected into the air circuit module 200 from the first air inlet. The first detection component 3 also includes a third solenoid valve 34, a fourth solenoid valve 35, and a fifth solenoid valve 36. By using the third solenoid valve 34, the fourth solenoid valve 35, and the fifth solenoid valve 36 to connect with the air inlet, the first air outlet, and the second air outlet, respectively, it is convenient to control the opening and closing of the air inlet, the first air outlet, and the second air outlet. When air leakage is detected in the air circuit module 200, the location of the leak can be further determined by controlling the opening and closing of the third solenoid valve 34, the fourth solenoid valve 35, and the fifth solenoid valve 36, which is convenient for maintenance.

[0039] In one embodiment, the second electric valve assembly 41 includes a sixth solenoid valve 411 and two seventh solenoid valves 412; the second detection pipeline 42 includes a main line and two branch lines, one end of the main line is connected to the carrier gas generator 6, one end of each of the two branch lines is connected to the other end of the main line, and the ends of the two branch lines away from the main line are respectively connected to the two chromatographic detection modules 300; the sixth solenoid valve 411 is disposed on the main line, and the two seventh solenoid valves 412 are respectively disposed on the two branch lines, and each branch line is provided with a second check valve 43.

[0040] In one embodiment, the degassing module has one inlet and two outlets. The inlet is an oil inlet, and the two outlets are an oil outlet and an exhaust port for communicating with the inlet of the gas circuit module 200, respectively. The third detection component 5 also includes a third electric valve group electrically connected to the third control module 2c. The third electric valve group includes an eighth solenoid valve, a ninth solenoid valve, and a tenth solenoid valve. The oil inlet, oil outlet, and exhaust port are respectively connected to the eighth solenoid valve, the ninth solenoid valve, and the tenth solenoid valve.

[0041] Understandably, by connecting the oil inlet, oil outlet, and exhaust port of the degassing module to the eighth, ninth, and tenth solenoid valves respectively; during leak detection, the third control module 2c controls the eighth solenoid valve to open, and the ninth and tenth solenoid valves to close, and controls the bipolar pump to run, thereby extracting the gas from the degassing module. At the same time, the third pressure sensor senses the gas pressure in the degassing module. When the pressure drops to a certain level, the bipolar pump stops running and the eighth solenoid valve closes simultaneously. When a leak is detected in the gas circuit module 200, the third control module 2c controls the opening and closing of the eighth, ninth, and tenth solenoid valves to further determine the location of the leak for easier maintenance.

[0042] In one embodiment, the pressure-holding leak detection system 100 further includes a host computer 8, which is electrically connected to the power module 1, and each detection module is electrically connected to the host computer 8. By setting up the host computer 8, it is convenient for users to operate and issue control commands to the three detection modules.

[0043] In one embodiment, the pressure-holding leak detection system 100 further includes three alarms 7, each electrically connected to one of the three control modules. Understandably, by setting up three alarms 7, when a leak is detected in the degassing module, the gas path module 200, or the chromatographic detection module 300, the corresponding alarm 7 will quickly alert the user.

[0044] Furthermore, each alarm 7 is a buzzer and / or a warning light; it should be noted that either a buzzer or a warning light can be set, or both a buzzer and a warning light can be set.

[0045] Please see Figure 5 The present invention also proposes a pressure-holding leak detection device 400, which utilizes the pressure-holding leak detection system 100 for transformer oil chromatography monitoring as described above. The specific structure of this pressure-holding leak detection system 100 for transformer oil chromatography monitoring is as described in the above embodiments. Since the pressure-holding leak detection device 400 adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here.

[0046] Furthermore, the pressure-holding and leak-detecting device 400 includes a cabinet 401, an installation space 402 is formed inside the cabinet 401, and the carrier gas generator 6 is installed in the installation space 402; four casters 403 are provided at the bottom of the cabinet, and the four casters 403 are respectively located near the four corners of the bottom of the cabinet.

[0047] Furthermore, the top of the cabinet 401 is provided with a downwardly recessed mounting groove for placing the air circuit module.

[0048] The above description is merely an exemplary embodiment of the present invention and does not limit the scope of protection of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A pressure-holding leak detection system for a transformer oil chromatography monitoring device, characterized in that, The oil chromatography monitoring device includes a carrier gas module, a degassing module, a gas path module, and a chromatography detection module, wherein the degassing module, the gas path module, and the chromatography detection module each have an inlet and an outlet; the pressure-maintaining leak detection system includes: Power module; Three control modules are provided, all of which are electrically connected to the power supply module. The three control modules are a first control module, a second control module, and a third control module. The detection module includes a carrier gas generator, a first detection component, a second detection component, and a third detection component. The first detection component includes a first detection pipeline, a first pressure sensor, and a first electric valve assembly. The two ends of the first detection pipeline are respectively connected to the inlet of the gas path module and the carrier gas generator. The first electric valve assembly is disposed on the first detection pipeline. The first pressure sensor is disposed on the first detection pipeline for detecting the pressure in the gas path module. The first pressure sensor is located between the first electric valve assembly and the gas path module. Both the first pressure sensor and the first electric valve assembly are electrically connected to the first control module. The second detection component includes a second detection pipeline, a second pressure sensor, and a second electric valve assembly. The two ends of the second detection pipeline are respectively connected to the inlet of the chromatographic detection module and the carrier gas generator. The second electric valve assembly is disposed on the second detection pipeline. The second pressure sensor is disposed on the chromatographic detection module for detecting the pressure inside the chromatographic detection module. Both the second pressure sensor and the second electric valve assembly are electrically connected to the second control module. The third detection component includes a third pressure sensor and a bipolar pump. The third pressure sensor is disposed on the degassing module to detect the pressure of the degassing module. The bipolar pump is disposed at the inlet of the degassing module. Both the third pressure sensor and the bipolar pump are electrically connected to the third control module. The first detection pipeline and the second detection pipeline are respectively provided with a first one-way valve and a second one-way valve; wherein, the first one-way valve is located between the first electric valve group and the air circuit module, and the second one-way valve is located between the second electric valve group and the second pressure sensor; The second electric valve assembly includes a sixth solenoid valve and two seventh solenoid valves; the second detection pipeline includes a main line and two branch lines, one end of the main line is connected to the carrier gas generator, one end of each of the two branch lines is connected to the other end of the main line, and the ends of the two branch lines away from the main line are respectively connected to the two chromatographic detection modules; the sixth solenoid valve is disposed on the main line, the two seventh solenoid valves are respectively disposed on the two branch lines, and each branch line is provided with a second one-way valve.

2. The pressure-holding leak detection system for the transformer oil chromatography monitoring device as described in claim 1, characterized in that, The first electric valve assembly includes a first solenoid valve and two second solenoid valves; the first detection pipeline includes a main line and two branch lines, one end of the main line is connected to the carrier gas generator, one end of each of the two branch lines is connected to the other end of the main line, and the ends of the two branch lines away from the main line are respectively used to connect to the two gas circuit modules, and the first pressure sensor is provided on each of the two branch lines; the first solenoid valve is provided on the main line, the two second solenoid valves are respectively provided on the two branch lines, and the first check valve is provided on each of the two branch lines.

3. The pressure-holding leak detection system for the transformer oil chromatography monitoring device as described in claim 2, characterized in that, The gas path module has two inlets and two outlets. The two inlets are a first inlet and a second inlet, respectively. The first inlet is used to communicate with the carrier gas module, and the second inlet is used to communicate with the outlet of the degassing module. The two outlets are a first outlet and a second outlet, respectively, which are used to communicate with the inlet and outlet of the chromatographic detection module. The first detection component further includes a third solenoid valve, a fourth solenoid valve, and a fifth solenoid valve that are electrically connected to the control module. The third solenoid valve, the fourth solenoid valve, and the fifth solenoid valve are respectively used to communicate with the air inlet, the first air outlet, and the second air outlet.

4. The pressure-holding leak detection system for the transformer oil chromatography monitoring device as described in any one of claims 1 to 3, characterized in that, The degassing module has one inlet and two outlets. The inlet is an oil inlet, and the two outlets are an oil outlet and an exhaust outlet for communicating with the inlet of the gas circuit module. The third detection component also includes a third electric valve group electrically connected to the third control module. The third electric valve group includes an eighth solenoid valve, a ninth solenoid valve, and a tenth solenoid valve. The oil inlet, the oil outlet, and the exhaust port are respectively connected to the eighth solenoid valve, the ninth solenoid valve, and the tenth solenoid valve.

5. The pressure-holding leak detection system for the transformer oil chromatography monitoring device as described in any one of claims 1 to 3, characterized in that, The pressure-holding and leak detection system also includes a host computer, which is electrically connected to the power module, and each of the detection modules is electrically connected to the host computer.

6. The pressure-holding leak detection system for the transformer oil chromatography monitoring device as described in any one of claims 1 to 3, characterized in that, The pressure-holding and leak detection system also includes three alarms, and the three alarms are electrically connected to the three control modules respectively.

7. The pressure-holding leak detection system for the transformer oil chromatography monitoring device as described in claim 6, characterized in that, Each of the aforementioned alarms is a buzzer and / or a warning light.

8. A pressure-holding leak detection device, characterized in that, The pressure-holding leak detection equipment uses a pressure-holding leak detection system for transformer oil chromatography monitoring devices as described in any one of claims 1 to 7.

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