Transformer oil-gas separation device and transformer oil on-line detection equipment

Abstract

The invention belongs to the technical field of transformer detection, and particularly relates to a transformer oil-gas separation device and on-line transformer oil detection equipment, the transformer oil-gas separation device comprises a degassing module, an oil path module and a gas path module, and the degassing module comprises a degassing tank and a filter which communicate with each other; the oil path module comprises a first oil path switch valve of an oil inlet path arranged between the degassing tank and the transformer; the gas circuit module comprises a gas pump, a gas inlet control assembly, a gas outlet control assembly, a gas inlet gas circuit, a gas outlet gas circuit and a gas storage assembly. An air inlet of the air pump is connected with the air storage assembly through an air inlet path, and an air outlet is connected with the air storage assembly through an air outlet path; the air inlet path is connected with the filter through the air inlet control assembly, and connection and disconnection between the air inlet path and the filter and the atmosphere can be controlled. The gas outlet path is connected with the atmosphere, the filter and the gas analysis device through the gas outlet control assembly, connection and disconnection between the gas outlet path and the atmosphere, the filter and the gas analysis device can be controlled, gas retention and loss can be reduced, the gas inlet amount of the gas analysis device is increased, and the accuracy of a measurement result is improved.

Description

Technical Field

[0001] This application belongs to the field of transformer testing technology, and in particular relates to a transformer oil-gas separation device and an online transformer oil testing device. Background Technology

[0002] Large power transformers are core equipment in power systems, and their safe operation is crucial for stable power supply. When an internal fault occurs in a transformer, gas will be released from the insulating oil. By analyzing the gas, the fault can be diagnosed. Therefore, it is necessary to install online transformer oil monitoring equipment to detect the released gas in order to identify potential problems as early as possible.

[0003] After the insulating oil is introduced into the transformer oil online monitoring equipment, the oil and gas are first separated using the transformer oil-gas separation device within the equipment. The separated gas is then sent to a gas analysis device for analysis to obtain the test results. In the actual testing process, the gas separated from the degassing tank of the transformer oil-gas separation device must pass through components such as air pumps and filters, as well as complex gas paths connecting these components, before entering the gas analysis device. However, the amount of gas separated from the degassing tank of the transformer oil-gas separation device is small, and some gas will remain trapped in the flow through multiple components and complex gas paths, resulting in significant gas loss and a greater risk of leakage. This further reduces the amount of gas flowing into the gas analysis device, placing higher demands on its performance. In addition, the gas separated from the degassing tank of the transformer oil-gas separation device often carries a small amount of oil molecules. Although a filter is installed at the outlet of the degassing tank to reduce the carrying of oil molecules, after long-term use, the oil molecules accumulated on the filter may still be carried into the downstream gas analysis device by the gas, causing contamination of the gas analysis device and affecting the accuracy of the measurement results.

[0004] Therefore, increasing the gas intake of the gas analysis device and reducing the contamination of the gas analysis device by the filter is an important research direction in the field of transformer testing.

[0005] The above statements are for the purpose of providing background information in relation to this application only and do not necessarily constitute prior art. Summary of the Invention

[0006] The purpose of this application is to provide a transformer oil-gas separation device and an online transformer oil detection device, which can improve the accuracy of insulating oil detection in transformers.

[0007] The technical solution adopted in this application embodiment is: a transformer oil-gas separation device, including a degassing module, an oil circuit module, and a gas circuit module; the degassing module includes a degassing tank and a filter, the degassing tank being connected to the filter, and the filter being used to filter the gas discharged from the degassing tank; the oil circuit module includes a first oil circuit switch valve, which is located in the oil inlet circuit between the degassing tank and the transformer; the gas circuit module includes an air pump, an air inlet control component, an air outlet control component, an air inlet circuit, an air outlet circuit, and a storage tank for storing the gas separated from the oil in the degassing tank. The air assembly consists of an air pump whose inlet is connected to a gas storage assembly via an inlet air passage, and an air pump whose outlet is connected to a gas storage assembly via an outlet air passage. The inlet air passage is connected to a filter via an inlet air control assembly, which controls the connection between the inlet air passage and the filter, as well as the connection between the inlet air passage and the atmosphere. The outlet air passage is connected to a filter and a gas analyzer via an outlet air control assembly, which controls the connection between the outlet air passage and the filter, the connection between the outlet air passage and the gas analyzer, and the connection between the outlet air passage and the atmosphere.

[0008] Optionally, the intake control assembly includes a first intake switch valve and a second intake switch valve. The first intake switch valve is located in the communication passage between the filter and the intake air passage; the second intake switch valve is located in the communication passage between the intake air passage and the atmosphere.

[0009] Optionally, the intake control assembly also includes a drying pipe, which is located in the air passage connecting the intake air passage and the atmosphere, and a second intake switch valve is located between the intake air passage and the drying pipe.

[0010] Optionally, the gas outlet control component includes a first gas outlet switch valve, a second gas outlet switch valve, and a third gas outlet switch valve. The first gas outlet switch valve is located in the gas outlet path connecting to the atmosphere, the second gas outlet switch valve is located in the gas outlet path connecting to the filter, and the third gas outlet switch valve is located in the gas outlet path connecting to the gas analyzer.

[0011] Optionally, the gas storage assembly includes a gas storage tank, a first gas storage switch valve, and a second gas storage switch valve. The gas storage tank is connected to the inlet gas passage through the first gas storage switch valve, which is used to control the on / off state of the gas storage tank and the inlet gas passage. The gas storage tank is connected to the outlet gas passage through the second gas storage switch valve, which is used to control the on / off state of the gas storage tank and the outlet gas passage.

[0012] Optionally, the gas storage tank is equipped with an oil drain valve, which is used to drain the oil in the gas storage tank.

[0013] Optionally, the oil circuit module includes an oil pump and a second oil circuit switching valve; the oil pump and the second oil circuit switching valve are located in the oil outlet circuit between the degassing tank and the transformer.

[0014] Optionally, the oil inlet and / or oil outlet circuits are equipped with three-way control valves.

[0015] Optionally, the degassing tank is equipped with a level detection device for detecting the oil level inside the degassing tank, and a first pressure sensor for detecting the gas pressure inside the degassing tank.

[0016] Another technical solution adopted in this application embodiment is: an online transformer oil detection device, including a gas analysis device and the above-mentioned transformer oil-gas separation device, wherein the gas analysis device is connected to the gas outlet path through a gas outlet control component.

[0017] The transformer oil-gas separation device and transformer oil online detection equipment provided in this application embodiment have at least one of the following technical effects: the air pump and the gas storage component form a closed-loop structure through the air inlet and air outlet paths. Simultaneously, with the control of the air inlet control component and the air outlet control component, the air pump connects to different gas paths, thereby completing operations such as oil inlet and vacuuming of the degassing tank, air inlet and outlet of the gas storage component, vacuuming of the gas path module, and backflushing of the filter. During this process, the gas precipitated from the oil in the degassing tank passes through the air inlet path, air outlet path, and the same air pump multiple times in the closed-loop structure, reducing gas retention, reducing gas loss, and increasing the air intake of the gas analysis device. Furthermore, the reverse blowing operation of the filter can blow oil molecules adhering to the filter into the degassing tank, reducing the accumulation of oil molecules on the filter, lowering the risk of oil molecules entering the gas analysis device, and improving the measurement accuracy of the gas analysis device.

[0018] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of a transformer oil-gas separation device provided in some embodiments of this application.

[0021] The following are the labeling elements in the figure: 100. Transformer oil-gas separator; 10. Degassing module; 11. Degassing tank; 1101. Main oil circuit; 111. Liquid level detection device; 1111. Liquid level sensor; 112. First pressure sensor; 113. Check valve; 114. Heating device; 1141. Heating film; 115. Stirring device; 1151. Magnetic stirring rod; 1152. Stirring motor; 116. Temperature sensor; 117. Third oil circuit switch valve; 12. Filter; 20. Oil circuit module; 201. Oil inlet circuit; 202. Oil outlet circuit; 21. First oil circuit switch valve; 22. Oil pump; 23. Second oil circuit 24. Switch valve; 25. Three-way control valve; 26. Oil inlet tank; 37. Hydrogen sensor; 38. Gas circuit module; 39. Air pump; 30. Inlet control assembly; 31. First inlet switch valve; 32. Second inlet switch valve; 32. Drying pipe; 33. Outlet control assembly; 34. First outlet switch valve; 35. Second outlet switch valve; 36. Third outlet switch valve; 37. Inlet gas circuit; 38. Outlet gas circuit; 39. Gas storage assembly; 30. Gas storage tank; 31. First gas storage switch valve; 32. Second gas storage switch valve; 33. Oil drain valve; 34. Second pressure sensor. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] In the description of the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include at least one of that feature.

[0024] In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

[0025] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0027] In the description of this application, it should be understood that the terms "inner", "outer", "side", "upper", "bottom", "front", "rear", etc., indicating the orientation or positional relationship are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0028] In the description of this application, it should be noted that the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0029] It should also be noted that in the embodiments of this application, the same reference numerals are used to represent the same component or part. For the same part in the embodiments of this application, the reference numerals may only be used to mark one part or component as an example. It should be understood that the reference numerals are also applicable to other identical parts or components.

[0030] During operation, transformers are affected by factors such as electricity, heat, oxidation, and localized electric arcs, causing their insulation materials (such as insulating oil and solid organic insulation materials) to gradually deteriorate and produce low-molecular-weight hydrocarbon gases. If there is a latent overheating or discharge fault inside the transformer, the rate of these gas generation will further accelerate; as the fault develops, the gas forms bubbles in the insulating oil, which then dissolve in the insulating oil through convection and diffusion.

[0031] To detect dissolved gaseous components in insulating oil, photoacoustic spectroscopy (PAS) has become the mainstream detection method due to its speed, accuracy, and efficiency. The PAS system works by utilizing the oil-gas separation coefficient and the infrared absorption coefficient of gases, combined with algorithmic inversion, to accurately measure the concentration of dissolved gases in the insulating oil. Therefore, in PAS detection and analysis, the degassing efficiency and stability of dissolved gases in the insulating oil are key factors affecting detection speed and accuracy.

[0032] Deterioration of transformer insulation materials and latent internal faults can lead to the generation of low-molecular-weight gases. PAS technology can assess the health status of transformers by detecting these dissolved gases. Degassing efficiency and degassing stability are important prerequisites for ensuring the accuracy of PAS detection. It is also necessary to install transformer oil online monitoring equipment to detect the released gases in order to detect potential problems as early as possible.

[0033] After the insulating oil is introduced into the transformer oil online monitoring equipment, oil and gas separation is first performed in the transformer oil-gas separation device within the equipment. The separated gas is then sent to a gas analysis device for analysis to obtain the test results. In the actual testing process, the gas separated from the degassing tank of the transformer oil-gas separation device must pass through multiple air pumps, filters, and other components, as well as the gas paths connecting these components, before entering the gas analysis device. However, the amount of gas separated from the degassing tank of the transformer oil-gas separation device is relatively small, and some gas will remain in the multiple components and complex gas paths it flows through, resulting in significant gas loss and a high risk of leakage. This further reduces the amount of gas flowing into the gas analysis device, placing higher demands on its performance. In addition, the gas separated from the degassing tank of the transformer oil-gas separation device often carries a small amount of oil molecules. Although a filter is installed at the outlet of the degassing tank to reduce the amount of oil molecules carried, after long-term use, the oil molecules accumulated on the filter may still be carried into the downstream gas analysis device by the gas, causing contamination of the gas analysis device and affecting the accuracy of the measurement results. Therefore, improving the gas intake of gas analysis devices and reducing oil molecule contamination of these devices is an important research direction in the field of transformer testing.

[0034] Based on this, this application provides a transformer oil-gas separation device and an online transformer oil detection device. The air pump and gas storage assembly form a closed-loop structure through an inlet and an outlet air path. Simultaneously, in coordination with the inlet and outlet control components, the air pump is controlled to connect to different air paths, enabling it to extract the gas precipitated in the degassing tank. The extracted gas is then transported to the gas storage assembly for storage via a filter, inlet control component, inlet air path, air pump, and outlet air path. Additionally, the air pump can also extract gas from the gas storage assembly. In this case, the extracted gas flows sequentially through the inlet air path, air pump, outlet air path, and outlet control component into the gas analysis device. During this process, the gas precipitated in the degassing tank passes through the inlet air path multiple times within the closed-loop structure. The gas flow path and the same air pump reduce gas retention, decrease gas loss, and increase the intake air volume of the gas analyzer. Furthermore, the air pump can draw atmospheric air into the intake path. After entering the pump, the air is then transported to the filter via the outlet control component. The filter is then subjected to reverse air blowing, which blows oil molecules adhering to the filter into the degassing tank, reducing oil molecule accumulation on the filter and lowering the risk of oil molecules entering the gas analyzer. This improves the measurement accuracy of the gas analyzer. Therefore, the transformer oil-gas separation device of this application embodiment helps to increase the intake air volume of the gas analyzer and reduce the risk of oil molecules entering the gas analyzer, thereby effectively improving the accuracy of the gas analyzer's detection results.

[0035] The following combination Figure 1 The transformer oil-gas separation device 100 and the transformer oil online detection device according to the embodiments of this application will be described.

[0036] Combination Figure 1As shown, in some embodiments, the transformer oil-gas separation device 100 includes a degassing module 10, an oil circuit module 20, and a gas circuit module 30. The degassing module 10 includes a degassing tank 11 and a filter 12. The degassing tank 11 is connected to the filter 12, and the filter 12 is used to filter the gas discharged from the degassing tank 11. The oil circuit module 20 includes a first oil circuit switch valve 21, which is located in the oil inlet circuit 201 between the degassing tank 11 and the transformer. The gas circuit module 30 includes an air pump 31, an air inlet control component 32, an air outlet control component 33, an air inlet circuit 34, an air outlet circuit 35, and a gas storage device for storing the gas separated from the oil in the degassing tank 11. Component 36: The air inlet of the air pump 31 is connected to the gas storage component 36 through the air inlet passage 34, and the air outlet of the air pump 31 is connected to the gas storage component 36 through the air outlet passage 35. The air inlet passage 34 is connected to the filter 12 through the air inlet control component 32, which is used to control the connection and disconnection between the air inlet passage 34 and the filter 12, as well as the connection and disconnection between the air inlet passage 34 and the atmosphere. The air outlet passage 35 is connected to the filter 12 and the gas analysis device through the air outlet control component 33, which is used to control the connection and disconnection between the air outlet passage 35 and the filter 12, the connection and disconnection between the air outlet passage 35 and the gas analysis device, as well as the connection and disconnection between the air outlet passage 35 and the atmosphere.

[0037] The transformer oil-gas separator 100 is used to separate the gas from the oil (e.g., insulating oil) inside the transformer. The transformer oil-gas separator 100 is connected between the transformer and the gas analysis device. After the oil inside the transformer flows into the transformer oil-gas separator 100 for oil-gas separation, the separated gas enters the gas analysis device for analysis, thereby obtaining the detection results of whether the transformer is faulty and the degree of fault.

[0038] A gas analyzer is a device used to receive the gas supplied by the gas circuit module 30 and detect its composition and concentration. By detecting the concentration of fault-characteristic gases (such as methane, acetylene, and hydrogen) in the gas, the gas analyzer determines whether there are faults such as overheating or discharge inside the transformer. The gas analyzer can be a photoacoustic gas analyzer, a gas chromatograph, an infrared gas analyzer, or a laser absorption spectrometer, etc.

[0039] The degassing module 10 can refer to a functional combination unit used to separate gas from oil and preliminarily filter oil molecules in the gas. The degassing module 10 includes a degassing tank 11 and a filter 12. The degassing tank 11 and the filter 12 work together to complete the oil-gas separation and the purification of the separated gas.

[0040] The degassing tank 11 can refer to a container used to separate dissolved gases from the oil in a transformer. The degassing tank 11 can be a vacuum degassing tank 11, a membrane separation degassing tank 11, or a stirred degassing tank 11.

[0041] Filter 12 can refer to a functional component installed at the outlet port of degassing tank 11, mainly used to filter oil mist or oil molecules carried in the gas. Filter 12 initially intercepts oil components in the gas precipitated from the oil in degassing tank 11, reducing the risk of oil contamination of subsequent gas path module 30 and gas analysis device; filter 12 can be a metal mesh filter 12, activated carbon filter 12, polymer membrane filter 12, etc.

[0042] The oil circuit module 20 is a control unit that controls whether oil enters the degassing tank 11. The oil circuit module 20 includes a first oil circuit switch valve 21, which is a valve installed on the oil inlet circuit 201 between the transformer and the degassing tank 11. It controls the flow of oil into the degassing tank 11. The first oil circuit switch valve 21 allows oil to enter on demand. When oil-gas separation is required, the first oil circuit switch valve 21 is opened to allow oil from the transformer to flow into the degassing tank 11. When the transformer oil-gas separation device 100 is stopped or no testing is required, the first oil circuit switch valve 21 is closed to cut off the oil circuit, reducing ineffective degassing and oil waste. The first oil circuit switch valve 21 can be a solenoid ball valve, a manual shut-off valve, or a pneumatic switch valve.

[0043] The gas path module 30 can refer to the unit of the transformer oil-gas separation device 100 used to realize gas output. The gas path module 30 includes an air pump 31, an air inlet control component 32, an air outlet control component 33, an air inlet path 34, an air outlet path 35, and a gas storage component 36.

[0044] The air pump 31 is a device that provides power for the gas flow within the gas path and serves as the power source for the gas path module 30. The air pump 31 can drive the gas to circulate within the closed-loop gas path and can also draw atmospheric air to clean the reverse filter 12. The air pump 31 can be a vacuum pump, a miniature diaphragm pump, a piston pump, a vane pump, etc.

[0045] The gas storage assembly 36 is a component used to store the gas separated from the degassing tank 11. The small amount of gas separated from the degassing tank 11 each time can flow into the gas storage assembly 36 for gradual storage. After accumulating sufficient gas, it can be transported to the gas analysis device, which helps to improve the accuracy of subsequent detection. The gas storage assembly 36 includes a gas storage container, which can be a pressure-resistant gas storage tank 361, a bladder-type gas storage device, etc.

[0046] The air intake passage 34 is a channel connecting the air inlet of the air pump 31 and the air storage assembly 36, and also serves as a delivery channel for the gas in the air storage assembly 36 to enter the air pump 31. The air intake passage 34 can be a pipe or a hole provided on the component. For example, the air intake passage 34 is a polytetrafluoroethylene tube, a stainless steel tube, a silicone tube, etc.

[0047] The gas outlet passage 35 is a channel connecting the gas outlet of the air pump 31 and the gas storage component 36, and it is also a delivery channel through which the air pump 31 delivers gas into the gas storage component 36. The gas outlet passage 35 can be a pipe or a hole provided on the component. For example, the gas outlet passage 35 is a polytetrafluoroethylene tube, a stainless steel tube, a silicone tube, etc.

[0048] The intake control component 32 is a control unit installed between the intake air passage 34 and the filter 12 and the atmosphere, and can selectively switch the connected objects of the intake air passage 34.

[0049] When it is necessary to collect the gas precipitated in the degassing tank 11, the air intake passage 34 is connected to the filter 12; when it is necessary to clean the filter 12, the air intake passage 34 is connected to the atmosphere to provide a clean air source for reverse blowing. The air intake control component 32 can be a three-way solenoid valve, a manual three-way valve, a combination of dual solenoid valves, etc.

[0050] The exhaust control component 33 is a control unit installed between the exhaust gas path 35 and the gas analyzer, the atmosphere, and the filter 12. It can selectively switch the gas destination of the exhaust gas path 35. When gas needs to be detected, the exhaust gas path 35 is connected to the gas analyzer; when gas needs to be discharged, the exhaust gas path 35 is connected to the atmosphere; when the filter 12 needs to be cleaned, the exhaust gas path 35 is connected to the filter 12, working in conjunction with the intake control component 32 to achieve reverse blowing. The exhaust control component 33 can be a four-way solenoid valve, a manual four-way valve, or a combination of multiple solenoid valves, etc.

[0051] The working principle of the transformer oil-gas separator 100 in this embodiment is as follows: Oil intake stage: The first oil circuit switch valve 21 of the control oil circuit module 20 is opened, the air intake control component 32 is switched to connect the filter 12 and the air intake circuit 34, the air outlet control component 33 is switched to connect the air outlet circuit 35 and the atmosphere, the air pump 31 is started, the air pump 31 extracts the gas in the degassing tank 11, and the gas is discharged into the atmosphere through the filter 12, the air intake control component 32, the air pump 31 and the air outlet control component 33, which causes the pressure in the degassing tank 11 to drop. At the same time, the transformer oil flows into the degassing tank 11 of the degassing module 10 automatically through the oil inlet circuit 201 under the action of pressure difference, realizing the automatic oil intake of the degassing tank 11. After the oil intake is completed, the first oil circuit switch valve 21 is closed to cut off the oil circuit and stop the oil from flowing into the degassing tank 11, reducing ineffective degassing.

[0052] During the oil and gas circuit vacuuming stage: the air pump 31 continues to operate, extracting the gas from the degassing tank 11 and creating a vacuum in the degassing tank 11. This removes residual gas from the degassing tank 11 and filter 12, reducing the impact on subsequent test results and improving the accuracy of the test results. The intake control component 32 switches to the intake air path 34, which is not connected to the filter 12 and the atmosphere. The exhaust control component 33 switches to connect the exhaust air path 35 and the atmosphere. The air pump 31 operates, drawing gas from the gas storage component 36 into the air pump 31 via the intake air path 34, and then delivering it to the atmosphere via the exhaust air path 35 and the exhaust control component 33. This removes residual gas from the gas storage component 36 and the intake air path 34, reducing the impact on subsequent test results and improving the accuracy of the test results.

[0053] Degassing stage: Degassing tank 11 starts working to separate the target gas from the oil.

[0054] Gas collection stage: The intake control component 32 switches to connect the intake air passage 34 and the filter 12, and the exhaust control component 33 switches to the exhaust air passage 35, which is not connected to the filter 12, the atmosphere, and the gas analysis device. The air pump 31 works, and the gas first passes through the filter 12 to filter oil molecules. The filtered gas enters the air pump 31 through the intake air passage 34, and then is transported to the gas storage component 36 through the exhaust air passage 35. Since the air pump 31 and the gas storage component 36 form a closed loop through the intake and exhaust air passages 35, the gas circulates repeatedly in the closed loop and gradually accumulates in the gas storage component 36 until a sufficient amount of gas is stored.

[0055] Gas delivery stage: When the amount of gas in the gas storage component 36 meets the detection requirements, the gas inlet control component 32 switches to the gas inlet path 34, which is not connected to the filter 12 and the atmosphere. The gas outlet control component 33 switches to connect the gas outlet path 35 and the gas analyzer. The gas pump 31 works, driving the gas in the gas storage component 36 to be drawn into the gas pump 31 through the gas inlet path 34, and then delivered to the gas analyzer through the gas outlet path 35 and the gas outlet control component 33. The gas analyzer detects the gas components and concentrations, generates detection results, and completes the detection.

[0056] Backflushing stage of filter 12: The intake control component 32 switches to connect the intake air passage 34 to the atmosphere, and the exhaust control component 33 switches to connect the exhaust air passage 35 to the filter 12. The air pump 31 works, drawing clean air from the atmosphere, which enters the air pump 31 through the intake air passage 34, and then is delivered to the filter 12 through the exhaust air passage 35 and the exhaust control component 33 to perform reverse air blowing on the filter 12. The airflow blows off the oil molecules on the filter 12, and the oil molecules flow back to the degassing tank 11 through the connecting pipe between the degassing tank 11 and the filter 12 with the airflow, completing the cleaning of the filter 12 and reducing the contamination of the subsequent air passage and gas analysis device by oil molecules.

[0057] By adopting the technical solution of this embodiment, the air pump 31 and the gas storage component 36 form a closed-loop structure through the inlet gas path 34 and the outlet gas path 35. Simultaneously, with the control of the inlet control component 32 and the outlet control component 33, the air pump 31 is connected to different gas paths, thereby completing operations such as oil intake and vacuuming of the degassing tank 11, air intake and exhaust of the gas storage component 36, vacuuming of the gas path module 30, and backflushing of the filter 12. During this process, the gas precipitated from the oil in the degassing tank 11 passes through the inlet gas path 34, the outlet gas path 35, and the same air pump 31 multiple times in the closed-loop structure, reducing gas retention, reducing gas loss, and increasing the intake volume of the gas analyzer. Furthermore, the reverse blowing operation of the filter 12 can blow oil molecules adhering to the filter 12 into the degassing tank 11, reducing the accumulation of oil molecules on the filter 12, lowering the risk of oil molecules entering the gas analyzer, and improving the measurement accuracy of the gas analyzer.

[0058] Under the suction of the air pump 31, the pressure inside the degassing tank 11 decreases, enabling automatic oil intake into the degassing tank 11 without the need for the oil pump 22. This simplifies the oil inlet pipeline, reduces the number of parts, lowers manufacturing costs, and reduces size. Through the ingenious design of the air circuit module 30, the entire transformer oil-gas separation device 100 uses only one air pump 31 to perform oil intake, vacuuming, gas storage, gas delivery, and filter 12 backflushing operations, significantly reducing manufacturing costs and size. The components within the air circuit module 30 form a compact modular structure, with close proximity between components, which helps reduce gas flow distance, minimizes gas loss, and increases the intake volume of the gas analysis device. The modular design of the air circuit module 30, oil circuit module 20, and degassing module 10 facilitates the assembly of the transformer oil-gas separation device 100, further reducing manufacturing costs and size.

[0059] In some embodiments, the intake control assembly 32 includes a first intake switch valve 321 and a second intake switch valve 322. The first intake switch valve 321 is disposed in the communication air passage between the filter 12 and the intake air passage 34; the second intake switch valve 322 is disposed in the communication air passage between the intake air passage 34 and the atmosphere.

[0060] The first intake switch valve 321 is a valve installed between the filter 12 and the intake air passage 34. It is used to control whether the gas extracted from the degassing tank 11 enters the intake air passage 34 after being filtered by the filter 12. The first intake switch valve 321 can be a miniature electromagnetic ball valve, a manual shut-off valve, a pneumatic diaphragm valve, etc. For example, it can be opened during oil intake and gas collection stages to allow the filtered gas to enter the intake air passage 34; and closed during the vacuuming and backflushing stages of the air passage and the filter 12 to prevent the target gas from being lost, mixed with the atmosphere, or affecting the air passage environment in other stages (such as leakage during vacuuming).

[0061] The second intake switch valve 322 is a valve installed between the intake air passage 34 and the atmosphere, used to control whether atmosphere enters the intake air passage 34. The second intake switch valve 322 opens during the backflushing stage of the filter 12, providing a clean air source for the backflushing filter 12; it closes during oil inlet, degassing, and gas collection stages to prevent dust, water vapor, and other impurities in the atmosphere from entering the air passage, contaminating the gas, and affecting detection accuracy. The second intake switch valve 322 can be a miniature electromagnetic ball valve, a manual needle valve, an electric butterfly valve, etc.

[0062] The air passage connecting the filter 12 and the intake air passage 34 refers to the branch pipe used to supply the gas filtered by the filter 12 to the intake air passage 34. One end of the branch pipe is connected to the outlet of the filter 12, and the other end is connected to the intake air passage 34 through the first intake switch valve 321.

[0063] The air passage connecting the intake air passage 34 to the atmosphere refers to the branch pipe used to supply air from the atmosphere to the intake air passage 34. One end of the branch pipe is connected to the atmosphere, and the other end is connected to the intake air passage 34 through the second intake switch valve 322.

[0064] By adopting the technical solution of this embodiment, the first intake switch valve 321 independently controls the opening and closing of the air passage connecting the filter 12 and the intake air passage 34, and the second intake switch valve 322 independently controls the opening and closing of the air passage connecting the intake air passage 34 and the atmosphere, realizing completely independent control of the two air passages, reducing the problem of cross-flow of air passages that may occur when switching multi-pass valves, and making the opening and closing state of each air passage more precise and independently adjustable, so as to better adapt to the intake requirements of the air passage module 30 at different stages.

[0065] In some embodiments, the intake control assembly 32 further includes a drying pipe 323, which is disposed in a communication passage between the intake air passage 34 and the atmosphere, and a second intake switch valve 322 is disposed between the intake air passage 34 and the drying pipe 323.

[0066] The drying tube 323 is a tubular component installed on the air intake passage 34, which connects to the atmosphere, and is used to adsorb or filter water vapor in the atmosphere. The drying tube 323 is installed on the intake side of the second intake switch valve 322. Air from the atmosphere is dried by the drying tube 323 and then enters the intake passage 34 through the second intake switch valve 322. The drying tube 323 can be a silica gel drying tube 323, a molecular sieve drying tube 323, an activated alumina drying tube 323, etc.

[0067] By adopting the technical solution of this embodiment, the drying tube 323 removes moisture from the air, avoids introducing moisture into the gas path module 30, and improves the accuracy of subsequent detection.

[0068] In some embodiments, the gas outlet control component 33 includes a first gas outlet switch valve 331, a second gas outlet switch valve 332, and a third gas outlet switch valve 333. The first gas outlet switch valve 331 is located in the gas outlet passage 35 and the atmosphere. The second gas outlet switch valve 332 is located in the gas outlet passage 35 and the filter 12. The third gas outlet switch valve 333 is located in the gas outlet passage 35 and the gas analysis device.

[0069] The first venting valve 331 is installed on the gas passage connecting the venting gas passage 35 to the atmosphere, and is used to control whether the gas in the venting gas passage 35 is discharged to the atmosphere. The first venting valve 331 can be a miniature solenoid ball valve, a manual shut-off valve, etc.

[0070] The second outlet valve 332 is installed on the gas line connecting the outlet gas line 35 and the filter 12, and is used to control whether the gas in the outlet gas line 35 is delivered to the filter 12. The second outlet valve 332 can be a pneumatic diaphragm valve, an electric regulating ball valve, a miniature solenoid valve, etc.

[0071] The third outlet valve 333 is a valve installed between the outlet gas path 35 and the gas analyzer. It is used to control whether the gas in the outlet gas path 35 flows to the gas analyzer. The third outlet valve 333 can be a pneumatic diaphragm valve, an electric regulating ball valve, a miniature solenoid valve, etc.

[0072] The gas outlet passage 35 is a branch pipe used to supply gas from the gas outlet passage 35 into the atmosphere. One end of the branch pipe is connected to the gas outlet passage 35, and the other end is connected to the atmosphere through the first gas outlet switch valve 331.

[0073] The gas passage connecting the outlet gas passage 35 and the filter 12 is a branch pipe used to supply gas from the outlet gas passage 35 to the filter 12. One end of the branch pipe is connected to the outlet gas passage 35, and the other end is connected to the filter 12 through the second outlet gas switch valve 332.

[0074] The gas outlet passage 35 and the gas analyzer are connected by a branch pipe for supplying gas from the gas outlet passage 35 to the gas analyzer. One end of the branch pipe is connected to the gas outlet passage 35, and the other end is connected to the gas inlet of the gas analyzer through the third gas outlet switch valve 333.

[0075] By adopting the technical solution of this embodiment, the first outlet switch valve 331 controls the opening and closing of the gas path connecting the outlet gas path 35 to the atmosphere, the second outlet switch valve 332 controls the opening and closing of the gas path connecting the outlet gas path 35 and the filter 12, and the third outlet switch valve 333 controls the opening and closing of the gas path connecting the outlet gas path 35 to the gas analysis device. By controlling the corresponding channels with dedicated valves, the problem of cross-flow of gas can be reduced when switching between multi-channel valves. At the same time, the on / off state of each outlet gas destination is more precise and independently adjustable, which can better adapt to the gas outlet requirements of the transformer oil-gas separation device 100 at different stages.

[0076] In some embodiments, the gas storage assembly 36 includes a gas storage tank 361, a first gas storage switch valve 362, and a second gas storage switch valve 363. The gas storage tank 361 is connected to the air inlet passage 34 through the first gas storage switch valve 362, which is used to control the on / off state of the gas storage tank 361 and the air inlet passage 34. The gas storage tank 361 is connected to the air outlet passage 35 through the second gas storage switch valve 363, which is used to control the on / off state of the gas storage tank 361 and the air outlet passage 35.

[0077] Gas storage tank 361 is a sealed container used for temporary storage of gases separated from oil. It can accumulate a large amount of gas during the gas collection stage, providing a large and stable gas source for the gas delivery and analysis stage. Gas storage tank 361 can be made of stainless steel, aluminum alloy, or lined with polytetrafluoroethylene, etc.

[0078] The first gas storage switch valve 362 is a valve installed between the gas storage tank 361 and the air inlet passage 34, used to control whether the gas in the gas storage tank 361 enters the air inlet passage 34. The first gas storage switch valve 362 can be a pneumatic diaphragm valve, an electric regulating ball valve, a miniature solenoid valve, etc.

[0079] The second gas storage switch valve 363 is a valve installed between the gas storage tank 361 and the gas outlet passage 35. It is used to control whether the gas pumped in by the air pump 31 enters the gas storage tank 361. The second gas storage switch valve 363 can be a pneumatic diaphragm valve, an electric regulating ball valve, a miniature solenoid valve, etc.

[0080] By adopting the technical solution of this embodiment, the gas storage tank 361 stores gas, and at the same time, the first gas storage switch valve 362 controls the opening and closing of the gas storage tank 361 and the gas inlet passage 34, and the second gas storage switch valve 363 controls the opening and closing of the gas storage tank 361 and the gas outlet passage 35, so that the storage and release of gas are completely independently controlled, ensuring that the gas does not leak or get contaminated during the storage process, and is not disturbed during the release, thereby improving the accuracy of detection.

[0081] In some embodiments, the gas storage tank 361 is provided with an oil drain valve 364, which is used to drain the oil in the gas storage tank 361.

[0082] The drain valve 364 is a valve installed on the air tank 361 to drain the small amount of oil accumulated inside the air tank 361. The drain valve 364 can be installed at or near the bottom of the air tank 361. The drain valve 364 can be a manual drain valve 364, a float-type drain valve 364, a solenoid drain valve 364, etc.

[0083] Although the transformer oil-gas separator 100 is equipped with a filter 12, after long-term operation, trace amounts of oil molecules may still enter the gas storage tank 361 along with the gas. Because these oil molecules are denser than gas, they will gradually settle to the bottom of the gas storage tank 361. If they are not drained in time, they may contaminate the gas stored subsequently, block the connection between the gas storage tank 361 and the air inlet 34, or even enter the gas analysis device with the gas, affecting the detection accuracy.

[0084] By adopting the technical solution of this embodiment, an oil drain valve 364 is provided in the gas storage tank 361 to drain the oil accumulated in the gas storage tank 361, avoid the oil from mixing with the gas stored later, ensure the stable quality of the gas sent into the gas analysis device each time, and reduce the detection error caused by oil contamination.

[0085] In some embodiments, the oil circuit module 20 includes an oil pump 22 and a second oil circuit switching valve 23; the oil pump 22 and the second oil circuit switching valve 23 are located in the oil outlet circuit 202 between the degassing tank 11 and the transformer.

[0086] Oil pump 22 is installed on the oil outlet line 202 between the degassing tank 11 and the transformer, and is used to pump the oil in the degassing tank 11 into the transformer. Oil pump 22 can be a gear pump, diaphragm pump 22, screw pump 22, etc.

[0087] The second oil circuit switch valve 23 is installed on the oil outlet line 202 between the degassing tank 11 and the transformer, controlling whether the oil in the degassing tank 11 enters the transformer. The second oil circuit switch valve 23 is located between the transformer and the oil pump 22. The second oil circuit switch valve 23 can be a solenoid ball valve, a manual shut-off valve, a check valve, etc.

[0088] Oil outlet line 202 is a pipe used to connect the degassing tank 11 and the transformer, and is the channel for the oil in the degassing tank 11 to flow back to the transformer.

[0089] During the oil discharge stage, the first vent valve 331, the second vent valve 332, and the second oil circuit valve 23 are opened, and the oil pump 22 is started. The oil pump 22 pumps the oil in the degassing tank 11 into the transformer. When the oil in the degassing tank 11 flows out, the pressure inside the tank will decrease. However, opening the first vent valve 331 and the second vent valve 332 allows atmospheric air to be introduced, increasing the pressure inside the degassing tank 11, balancing the pressure fluctuations, and facilitating the return of the oil to the transformer.

[0090] By adopting the technical solution of this embodiment, the oil pump 22 can return the oil in the degassing tank 11 to the transformer. At the same time, the second oil circuit switch valve 23 can control the opening and closing of the oil circuit between the degassing tank 11 and the transformer, so that the oil in the degassing tank 11 can be quickly and controllably returned to the transformer, avoiding the oil from being retained and deteriorating in the degassing tank 11 for a long time. In addition, the coordination of the oil inlet circuit and the oil outlet circuit can input the oil in the transformer into the degassing tank 11 before testing, and then return the oil in the degassing tank 11 to the transformer, thereby flushing the oil remaining in the degassing tank 11 from previous testing and improving the accuracy of testing. Multiple oil washing operations can be performed during the testing process.

[0091] In some embodiments, the degassing tank 11 is connected to a main oil passage 1101. One end of the main oil passage 1101 is connected to the degassing tank 11, and the other end is connected to the oil outlet passage 202 and the oil inlet passage 201. The main oil passage 1101 is provided with a third oil passage switch valve 117, which can control the flow of oil between the degassing tank 11 and the main oil passage 1101.

[0092] Transformer oil online testing equipment may have some errors after running for a long time. Therefore, it is necessary to recalibrate the equipment to verify the accuracy of its test results.

[0093] In some embodiments, the oil inlet passage 201 and / or the oil outlet passage 202 are provided with a three-way control valve 24.

[0094] In some examples, the oil inlet circuit 201 is equipped with a three-way control valve 24. The three-way control valve 24 has three ports, two of which are connected to the oil inlet circuit 201, and the other port serves as a calibration inlet. The three-way control valve 24 is located between the transformer and the first oil circuit switch valve 21. When the oil inlet circuit 201 is connected to the three-way control valve 24, the oil in the transformer flows into the degassing tank 11. When the three-way control valve 24 connects the transformer and the calibration inlet, standard oil with a certain gas content is poured into the calibration inlet and then enters the degassing tank 11 for degassing. The gas obtained after degassing enters a gas analysis device for detection to obtain the detection result. The detection result is compared with the preset result to verify the accuracy of the transformer oil online detection equipment. In this way, the calibration of the transformer oil online detection equipment is achieved.

[0095] In some examples, the oil outlet circuit 202 is equipped with a three-way control valve 24. The three-way control valve 24 has three ports, two of which are connected to the oil outlet circuit 202, and the other port serves as a calibration outlet. The three-way control valve 24 is located between the transformer and the second oil circuit switching valve 23. When the oil outlet circuit 202 is connected to the three-way control valve 24, the oil in the degassing tank 11 flows back to the transformer; when the three-way control valve 24 connects the transformer and the calibration outlet, standard oil can flow out from the calibration outlet, facilitating subsequent oil testing.

[0096] The three-way control valve 24 can be a three-way ball valve, etc.

[0097] By adopting the technical solution of this embodiment, the oil inlet circuit 201 is equipped with a three-way control valve 24, which can verify the accuracy of the transformer oil online detection equipment; the oil outlet circuit 202 is equipped with a three-way control valve 24, which facilitates the discharge of standard oil.

[0098] In some embodiments, an oil inlet tank 25 is connected between the oil inlet circuit 201 and the main oil circuit 1101. The oil inlet tank 25 is equipped with a hydrogen sensor 26. The oil in the transformer enters the oil inlet tank 25 through the three-way control valve 24 and the first oil circuit switch valve 21, and then enters the degassing tank 11 through the oil inlet tank 25. Before the oil enters the degassing tank 11, the hydrogen sensor 26 performs pre-monitoring of the dissolved hydrogen in the oil, which can detect abnormal signals of the transformer in advance and prevent the fault from developing further.

[0099] In some embodiments, the degassing tank 11 is provided with a level detection device 111 for detecting the oil level inside the degassing tank 11, and a first pressure sensor 112 for detecting the air pressure inside the degassing tank 11.

[0100] The liquid level detection device 111 refers to a device installed on the degassing tank 11 for real-time detection of the oil level in the degassing tank 11. This device can convert the liquid level signal into an electrical signal (such as voltage or current) and transmit it to the control system.

[0101] In some examples, the liquid level detection device 111 includes two liquid level sensors 1111, which are spaced apart along the height of the degassing tank 11, for detecting the maximum and minimum liquid levels of the degassing tank 11.

[0102] During the oil inlet stage, when the oil level reaches the target oil inlet volume, the level detection device 111 sends a signal to the control system to trigger the first oil circuit switch valve 21 to close, ensuring that the oil volume entering the degassing tank 11 is consistent each time, avoiding insufficient degassing due to excessive oil volume, or insufficient target gas volume due to insufficient oil volume; at the same time, during the oil outlet stage, the level detection can help determine whether the oil has been emptied, avoiding residual oil from affecting the next round of detection.

[0103] The first pressure sensor 112 is a device installed on the degassing tank 11 to detect the gas pressure inside the degassing tank 11 in real time. It can convert the pressure signal into an electrical signal and transmit it to the control system. The first pressure sensor 112 is usually installed on the top of the degassing tank 11, away from the oil, to avoid contact with the oil.

[0104] During the oil inlet stage, the oil entering the degassing tank 11 will compress the internal gas, and the gas pressure should increase regularly as the liquid level rises. If the gas pressure exceeds the preset threshold, it indicates an abnormality in the oil circuit system. This may be due to air leakage in the oil inlet circuit 201 or air leakage in the transformer, causing air to enter the degassing tank 11 with the oil. At this time, an alarm will be triggered to indicate an abnormal oil inlet.

[0105] In some embodiments, the gas storage tank 361 is equipped with a second pressure sensor 365, which monitors the pressure state of the gas inside the gas storage tank 361 in real time. During the gas evacuation stage, gas flows out of the gas storage tank 361, and the pressure inside the tank decreases as the amount of gas decreases. The second pressure sensor 365 can monitor the pressure change in real time. When the pressure reaches a preset threshold, it sends a vacuum completion signal to the control system, triggering the air pump 31 or the first gas outlet switch valve 331 to stop working.

[0106] In some embodiments, the degassing tank 11 is provided with a one-way valve 113, which is used to release gas inside the degassing tank 11. The gas inside the degassing tank 11 can be discharged through the one-way valve 113. In some embodiments, the degassing tank 11 is provided with a heating device 114, which is used to heat the oil in the degassing tank 11 to help the gas in the oil to be released and improve the degassing efficiency.

[0107] In some embodiments, the heating device 114 includes a heating film 1141, which is attached to the wall of the degassing tank 11 and can heat the oil in the degassing tank 11 more evenly, further promoting the release of gas from the oil.

[0108] In some embodiments, the degassing tank 11 is provided with a temperature sensor 116, which is used to detect the oil temperature. This can prevent the heating device 114 from overheating the oil or the oil heating temperature from being too low, so as to control the oil temperature in the degassing tank 11 within a preset range and thereby improve the degassing efficiency of the oil.

[0109] In some embodiments, the degassing tank 11 is provided with a stirring device 115, which is used to stir the oil in the degassing tank 11 to facilitate better gas release from the oil.

[0110] In some embodiments, the stirring device 115 includes a magnetic stirring rod 1151 and a stirring motor 1152. The magnetic stirring rod 1151 is located at the bottom inside the degassing tank 11, and the stirring motor 1152 is located below the degassing tank 11. After the stirring motor 1152 is started, the stirring motor 1152 drives the magnetic stirring rod 1151 to rotate through magnetic force, thereby completing the oil stirring. The use of magnetic stirring eliminates the need for perforations in the degassing tank 11, which helps to improve the sealing performance of the degassing tank 11, reduce oil and gas leakage, and improve detection accuracy.

[0111] Combination Figure 1 The working process of the transformer oil-gas separator 100 is as follows: After powering on, turn on the heating film 1141 outside the degassing tank 11 to control the temperature inside the degassing tank 11 at 50℃.

[0112] Oil intake phase: The first air intake valve 321 and the first air outlet valve 331 are opened, and the air pump 31 extracts the gas from the degassing tank 11 until the first pressure sensor 112 detects that the pressure inside the tank has dropped to 10 kPa. Then, all valves are closed. Subsequently, the first oil circuit valve 21 and the third oil circuit valve 117 are opened, and the entire oil circuit system uses negative pressure to achieve oil intake. As the amount of oil in the degassing tank 11 increases, the internal space is compressed, the pressure gradually increases, and the oil intake rate slows down. Combined with the liquid level sensor 1111 located at the top of the degassing tank 11, the consistency of the oil intake volume can be ensured each time, improving the stability and repeatability of the system's oil intake. When the liquid level sensor 1111 located at the top of the degassing tank 11 sends a signal, all valves are closed, and oil intake is completed. At the same time, if the pressure detected by the first pressure sensor 112 is lower than 50 kPa, the oil intake is considered normal; if the pressure exceeds this value, it indicates that air has entered the degassing tank 11, which indicates an abnormal oil intake.

[0113] Oil discharge stage: Open the second oil circuit switch valve 23, the third oil circuit switch valve 117, the first vent switch valve 331, the second vent switch valve 332, and the oil pump 22 to pump the oil in the degassing tank 11 into the transformer; when the signal from the liquid level sensor 1111 at the bottom of the degassing tank 11 disappears, close all valves. An oil discharge operation is required after the first oil inlet to clean the oil circuit and degassing tank 11, preventing residual oil from the previous inlet from affecting the detection results, thereby improving the detection accuracy of the gas analyzer.

[0114] During the oil and gas circuit vacuuming stage: Open the first inlet valve 321 and the first outlet valve 331, and use the air pump 31 to extract the gas from the degassing tank 11 until the first pressure sensor 112 detects that the pressure inside the tank has dropped below 5 kPa. Then, close all valves to complete the vacuuming operation of the degassing tank 11. Open the first gas storage valve 362 and the first outlet valve 331, and use the air pump 31 to extract the gas from the gas storage tank 361 until the second pressure sensor 365 detects that the pressure inside the tank has dropped below 5 kPa. Then, close all valves to complete the vacuuming operation of the gas storage tank 361.

[0115] Stirring, degassing, and gas collection stage: Start the stirring motor 1152 to drive the magnetic stirring rod 1151 to stir the oil in the degassing tank 11; after 2 minutes, open the first air inlet switch valve 321 and the second air storage switch valve 363, and use the air pump 31 to extract the gas from the degassing tank 11 until the first pressure sensor 112 detects that the pressure inside the tank has dropped below 5 kPa again, and at the same time, send the degassed gas into the air storage tank 361. Repeat this step multiple times to ensure that the degassing tank 11 is always in a low-pressure and constant-temperature state to quickly remove the dissolved gas from the oil.

[0116] Gas delivery stage: Open the first gas storage switch valve 362 and the third gas outlet switch valve 333, and drive the gas in the gas storage tank 361 to the gas analysis device through the gas pump 31.

[0117] After completing the above steps, repeat the oil discharge operation once more.

[0118] Finally, open the second air inlet switch valve 322, the second air outlet switch valve 332, and the air pump 31, and blow air into the filter 12 in reverse for 2 minutes to blow the oil molecules attached to the filter 12 into the degassing tank 11; cleaning the filter 12 by blowing air in reverse can prevent oil molecules from contaminating the gas analysis device and improve the detection accuracy.

[0119] In some embodiments, the online transformer oil detection equipment includes a gas analysis device and the above-mentioned transformer oil-gas separation device 100, and the gas analysis device is connected to the gas outlet path 35 through the gas outlet control component 33.

[0120] By adopting the technical solution of this embodiment and employing the aforementioned transformer oil-gas separation device 100, the detection accuracy of the online transformer oil detection equipment is improved. The descriptions of the various embodiments above tend to emphasize the differences between them; however, similarities or identical aspects can be referred to mutually. For the sake of brevity, these will not be elaborated upon further.

[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A transformer oil and gas separation device, characterized by, include: A degassing module includes a degassing tank and a filter, wherein the degassing tank is connected to the filter and the filter is used to filter the gas discharged from the degassing tank; The oil circuit module includes a first oil circuit switching valve, which is located in the oil inlet circuit between the degassing tank and the transformer. The gas path module includes an air pump, an air inlet control component, an air outlet control component, an air inlet path, an air outlet path, and a gas storage component for storing the gas separated from the oil in the degassing tank. The air inlet of the air pump is connected to the gas storage component through the air inlet path, and the air outlet of the air pump is connected to the gas storage component through the air outlet path. The intake air passage is connected to the filter through the intake control component, and the intake control component is used to control the opening and closing of the intake air passage and the filter, as well as the opening and closing of the intake air passage and the atmosphere. The outlet gas path is connected to the filter and the gas analysis device through the outlet gas control component. The outlet gas control component is used to control the connection and disconnection between the outlet gas path and the filter, the connection and disconnection between the outlet gas path and the gas analysis device, and the connection and disconnection between the outlet gas path and the atmosphere.

2. The transformer oil and gas separation device of claim 1, wherein: The intake control assembly includes a first intake switch valve and a second intake switch valve. The first intake switch valve is located in the communication air passage between the filter and the intake air passage; the second intake switch valve is located in the communication air passage between the intake air passage and the atmosphere.

3. The transformer oil and gas separation device of claim 2, wherein: The intake control assembly further includes a drying tube, which is located in the air passage connecting the intake air passage and the atmosphere, and the second intake switch valve is located between the intake air passage and the drying tube.

4. The transformer oil and gas separation device of claim 1, wherein: The gas outlet control component includes a first gas outlet switch valve, a second gas outlet switch valve, and a third gas outlet switch valve. The first gas outlet switch valve is located in the gas outlet path connecting the gas outlet path to the atmosphere. The second gas outlet switch valve is located in the gas outlet path connecting the gas outlet path to the filter. The third gas outlet switch valve is located in the gas outlet path connecting the gas outlet path to the gas analysis device.

5. The transformer oil and gas separation device of any one of claims 1-4, wherein: The gas storage assembly includes a gas storage tank, a first gas storage switch valve, and a second gas storage switch valve. The gas storage tank is connected to the inlet gas passage through the first gas storage switch valve, which controls the on / off state of the gas storage tank and the inlet gas passage. The gas storage tank is connected to the outlet gas passage through the second gas storage switch valve, which also controls the on / off state of the gas storage tank and the outlet gas passage.

6. The transformer oil and gas separation device of claim 5, wherein: The gas storage tank is equipped with an oil drain valve, which is used to drain the oil in the gas storage tank.

7. The transformer oil and gas separation device of any one of claims 1-4, wherein: The oil circuit module includes an oil pump and a second oil circuit switching valve; the oil pump and the second oil circuit switching valve are located in the oil outlet circuit between the degassing tank and the transformer.

8. The transformer oil and gas separation device of claim 7, wherein: The oil inlet circuit and / or the oil outlet circuit are equipped with a three-way control valve.

9. The transformer oil and gas separation device of any one of claims 1-4, wherein: The degassing tank is equipped with a level detection device for detecting the oil level inside the degassing tank, and a first pressure sensor for detecting the gas pressure inside the degassing tank.

10. An online transformer oil testing device, characterized in that, The device includes a gas analysis device and a transformer oil-gas separation device according to any one of claims 1 to 9, wherein the gas analysis device is connected to the gas outlet path through the gas outlet control component.

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