Method and device for rapidly separating and enriching dissolved gas in transformer insulating oil

Abstract

The invention relates to the technical field of transformer state detection, in particular to a method and device for rapidly separating and enriching dissolved gas in transformer insulating oil. The method comprises the following steps: taking out an oil sample from a transformer; introducing helium / nitrogen / argon into the oil sample in a purging manner to bubble the oil sample, so that dissolved gas in the oil sample escapes to obtain sample components; the sample components are adsorbed and captured, and the sample components are decomposed and absorbed through heating; and analyzing the desorbed sample components by using an analysis instrument to obtain the concentration of the dissolved gas in the oil sample. When the dissolved gas in the enriched oil sample is separated, the process is simple, the efficiency is high, and meanwhile, the accuracy of the analysis result of the dissolved gas can be ensured.

Description

Technical Field

[0001] The present application relates to the technical field of transformer status detection, and in particular to a method and device for quickly separating and enriching dissolved gas in transformer insulating oil. Background Art

[0002] Oil-immersed transformers and reactors are important electrical equipment in power systems. Once a fault or defect occurs, it may cause explosion or even fire. Online monitoring of dissolved gas in oil is widely used in large oil-filled electrical equipment as an important monitoring method. The change of dissolved gas component content in insulating oil is a reliable basis for evaluating the operating status of equipment and diagnosing defects.

[0003] In the existing detection process, the oil and gas separation process mainly includes vacuum degassing method, headspace degassing method and vibration degassing method, which have problems such as long degassing time and complicated process. Summary of the invention

[0004] The present application provides a method and device for quickly separating and enriching dissolved gas in transformer insulating oil. Inert gas is introduced into the oil sample in a purging manner so that the inert gas is quickly bubbled in the oil sample, thereby accelerating the separation of dissolved gas from the oil sample, thereby solving the problems of long degassing time and complicated process in the existing oil-gas separation process.

[0005] This application is implemented through the following technical solutions:

[0006] In a first aspect, the present application provides a method for rapidly separating and enriching dissolved gas in transformer insulating oil, comprising the following steps:

[0007] a. Take out the oil sample from the transformer;

[0008] b. Introduce helium / nitrogen / argon into the oil sample in a purging manner to bubble the oil sample, thereby allowing the dissolved gas in the oil sample to escape and obtain the sample components;

[0009] c. Adsorb and capture sample components, and desorb the sample components by heating;

[0010] d. Use analytical instruments to analyze the sample components after desorption to obtain the dissolved gas concentration in the oil sample.

[0011] The present application provides a method for rapid separation and enrichment of dissolved gas in transformer insulating oil. When an inert gas such as helium, nitrogen or argon is purged into the oil sample, a large number of bubbles can be quickly formed in the oil sample due to the relatively low solubility of the inert gas in the oil sample. The significantly increased gas surface pressure will destroy the gas balance in the oil sample, prompting the dissolved gas to escape into the inert gas to form bubbles; the purge gas can stir the oil sample, enhance the kinetic energy and convection of the gas molecules, and make more gas molecules escape from the oil sample into the purge gas; at the same time, the flow of the purge gas promotes the diffusion of the gas in the oil sample, further increasing the efficiency of gas escape; compared with the oil-gas separation process commonly used in the prior art using vacuum degassing, headspace degassing and oscillation degassing, the implementation process is simpler, takes less time, and has a higher separation efficiency of dissolved gas and oil sample. These escaped gas molecules are captured on the adsorbent and enriched after heating desorption. Finally, the desorbed gas is tested by an analytical instrument to determine the concentration of various dissolved gases in the oil sample, thereby evaluating the health of the transformer oil and the operating status of the equipment. This method not only improves the escape efficiency and enrichment effect of dissolved gases, but also ensures the accuracy and reliability of the analysis.

[0012] In some optional embodiments, in step b, helium is used to bubble the oil sample.

[0013] When helium is used for purging, its high diffusivity and low solubility enable it to bubble quickly and evenly distribute in the oil sample, effectively removing dissolved gases and harmful substances, reducing background interference and chemical reactions, and thus improving the accuracy of analysis. The inert properties of helium ensure that it will not react with the oil sample during the purging process, preventing the occurrence of oxidation reactions and maintaining the integrity of the sample. In addition, when helium is used as a carrier gas in analytical techniques such as gas chromatography, it can improve sensitivity and resolution, and its excellent thermal conductivity helps with temperature control.

[0014] In some optional embodiments, the flow rate of helium is configured to be 20-60 mL / min.

[0015] This flow rate range can ensure the effective mixing and rapid purging of helium in the oil sample, promote the timely removal of dissolved gases and impurities, and thus improve the purity and analytical accuracy of the sample. Secondly, the appropriate flow rate will not affect the capture of sample components, can avoid the loss of sample components, and will not cause bubble formation in the sample or interfere with the separation efficiency of gas chromatography. In addition, the flow rate adjustment is also related to the oxygen demand and detection sensitivity of the analytical instrument. Too high a flow rate may lead to an increase in baseline noise, while too low a flow rate may affect the response speed of the analysis. Therefore, selecting a flow rate range of 20 to 60 mL / min can ensure the reliability and stability of the experimental results.

[0016] In some optional embodiments, the flow rate of helium is configured to be 40 mL / min.

[0017] In some optional embodiments, the container of the oil sample is placed in a heating device, and the oil sample is stirred using a magnetic stirring bar.

[0018] The magnetic stirring bar can stir the oil sample evenly without direct contact with it, avoiding the pollution and wear that may be caused by mechanical stirring. The magnetic stirrer acts on the stirring bar through the magnetic field, causing it to rotate inside the container, thereby achieving uniform mixing of the oil sample in combination with the stirring effect of the purge gas on the oil sample. This non-contact stirring method not only improves the safety and accuracy of the experiment, but also reduces physical damage to the sample, thus ensuring that the oil sample can be heated evenly during the heating process, avoiding local overheating that causes sample decomposition or uneven component changes. The use of a magnetic stirring bar can also keep the oil sample fully mixed during the heating process, ensuring that the components to be tested can be evenly distributed, and improving the accuracy and reliability of the analysis. At the same time, uniform heating and mixing also help reduce possible errors in the analysis process and improve the reproducibility and stability of the test results.

[0019] In some optional embodiments, the sample components are subjected to heat preservation treatment before being adsorbed and analyzed so as to keep the temperature of the sample components at 80-150°C.

[0020] Insulation treatment can ensure that the sample is heated evenly over a wide temperature range, avoiding component decomposition or chemical reaction caused by local overheating, and avoiding condensation of sample components, thereby maintaining the integrity of the sample and the accuracy of the analysis results. In addition, appropriate temperature can improve the solubility and stability of insoluble or volatile components, reduce the volatilization loss of components, and ensure uniform mixing of components and stability of reaction conditions during the analysis process. This can not only improve the accuracy and reproducibility of the analysis, but also prolong the stability of the sample and reduce the analysis errors caused by temperature fluctuations.

[0021] In some optional embodiments, in step b, purging is achieved by mechanical oscillation or static purging.

[0022] In some optional embodiments, sample components are adsorbed by a porous material.

[0023] First, porous materials usually have a larger specific surface area and a more complex internal pore structure, which enables them to provide a higher adsorption capacity, thereby processing more samples in a smaller space. This efficient adsorption capacity can greatly shorten the processing time. Secondly, compared with traditional separation technologies such as distillation or membrane separation, porous materials are often simpler and more flexible in operation, do not require complex equipment or a lot of energy consumption, and reduce production costs. In addition, due to the high selectivity of porous materials, they can be optimized for specific components, reducing the interference of pollutants and improving the purity and effectiveness of separation.

[0024] In a second aspect, the present application provides a device for rapidly separating and enriching dissolved gas in transformer insulating oil, which is used to implement any of the methods for rapidly separating and enriching dissolved gas in transformer insulating oil described in the first aspect, comprising:

[0025] Container for holding oil sample;

[0026] a purge mechanism connected to the container and used to supply gas to the container in a purge manner;

[0027] A capture mechanism connected to the container and used to capture sample components escaping from the container in an adsorption manner;

[0028] a desorption mechanism connected to the trapping mechanism to heat the trapping mechanism, thereby desorbing the sample components;

[0029] an analysis mechanism connected to the capture mechanism and used for automatically analyzing sample components;

[0030] A heat preservation mechanism is provided on the connecting pipelines of each mechanism to keep the medium in the connecting pipelines warm or heat the medium;

[0031] The controller is respectively connected with the purge mechanism, the capture mechanism, the desorption mechanism, the analysis mechanism and the heat preservation mechanism.

[0032] In some optional embodiments, a sensor system is also included, wherein the sensor system is used to monitor state parameters of the objects of action of the purge mechanism, the capture mechanism, the desorption mechanism, the analysis mechanism and the insulation mechanism, and the controller adjusts the purge mechanism, the capture mechanism, the desorption mechanism, the analysis mechanism and the insulation mechanism according to the state parameters.

[0033] Compared with the prior art, this application has the following advantages and beneficial effects:

[0034] 1. The present application provides a method and device for rapid separation and enrichment of dissolved gas in transformer insulating oil. When an inert gas such as helium, nitrogen or argon is purged into the oil sample, a large number of bubbles can be quickly formed in the oil sample due to the relatively low solubility of the inert gas in the oil sample. The significantly increased gas surface pressure will destroy the gas balance in the oil sample, prompting the dissolved gas to escape into the inert gas to form bubbles; the purge gas can stir the oil sample, enhance the kinetic energy and convection of the gas molecules, and make more gas molecules escape from the oil sample into the purge gas; at the same time, the flow of the purge gas promotes the diffusion of the gas in the oil sample, further increasing the efficiency of gas escape; compared with the oil-gas separation process commonly used in the prior art using vacuum degassing, headspace degassing and oscillation degassing, the implementation process is simpler, takes less time, and has a higher separation efficiency of dissolved gas and oil sample. These escaped gas molecules are captured on the adsorbent and enriched after heating desorption. Finally, the desorbed gas is tested by an analytical instrument to determine the concentration of various dissolved gases in the oil sample, thereby evaluating the health of the transformer oil and the operating status of the equipment. This method not only improves the escape efficiency and enrichment effect of dissolved gases, but also ensures the accuracy and reliability of the analysis.

[0035] 2. The method and device for rapid separation and enrichment of dissolved gas in transformer insulating oil provided in the present application can ensure the accuracy and reproducibility of the measurement results by precisely controlling the temperature during the purging and capturing process, the solubility of the sample, the flow rate and flow of the purging gas, the capture efficiency, and the analysis temperature and time.

[0036] 3. The method and device for rapid separation and enrichment of dissolved gases in transformer insulating oil provided in the present application can realize the selective capture of one or more gases by configuring different adsorption materials, which is convenient for analyzing single or multiple gas components. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present application and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0038] Figure 1 A schematic flow chart of a method for rapid separation and enrichment of dissolved gas in transformer insulating oil provided in an embodiment of the present application;

[0039] Figure 2 A schematic diagram of the connection relationship of a device for rapidly separating and enriching dissolved gas in transformer insulating oil provided in an embodiment of the present application.

[0040] Marks and corresponding parts names in the attached drawings:

[0041] 1-Purge mechanism, 2-Container, 3-Heating jacket, 4-Collection mechanism, 5-Desorption mechanism, 6-Analysis mechanism, 7-Switching valve. DETAILED DESCRIPTION

[0042] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with examples and drawings. The illustrative implementation scheme of the present application and its description are only used to explain the present application and are not intended to limit the present application.

[0043] First, as Figure 1 As shown, the embodiment of the present application provides a method for quickly separating and enriching dissolved gas in transformer insulating oil, comprising the following steps:

[0044] S1. Take the oil sample from the transformer.

[0045] After the oil sample is taken out, it can be loaded and taken out through the glass container 2. The glass container 2 does not react with the oil sample and can maintain the purity of the oil sample. In actual implementation, a transparent glass container can be selected to facilitate observation of the internal oil sample state, or an opaque dark glass container can be selected to prevent the influence of light on the oil sample. In other embodiments, a stainless steel container 2 or a special plastic container 2 can also be used to load and take out the oil sample.

[0046] In order to ensure that the oil sample has a continuous and stable operating temperature, the glass container 2 can be placed in the heating jacket 3, which can heat and keep the oil sample in the glass container 2 warm; at the same time, a magnetic stirring bar can be placed in the glass container 2 for stirring, and the magnetic stirring bar can stir the oil sample evenly without directly contacting the oil sample, thereby avoiding the pollution and wear that may be caused by mechanical stirring. The magnetic stirrer acts on the stirring bar through a magnetic field to rotate it inside the container 2, thereby stirring the oil sample to achieve uniform mixing of the oil sample. This non-contact stirring method not only improves the safety and accuracy of the experiment, but also reduces physical damage to the sample, thus ensuring that the oil sample can be evenly heated during the heating process, avoiding local overheating that causes sample decomposition or uneven component changes. The use of a magnetic stirring bar can also keep the oil sample fully mixed during the heating process, ensuring that the components to be tested can be evenly distributed, and improving the accuracy and reliability of the analysis. At the same time, uniform heating and mixing also help reduce errors that may occur during the analysis process and improve the reproducibility and stability of the test results.

[0047] S2. Introduce helium / nitrogen / argon into the oil sample in a purging manner to bubble the oil sample, thereby allowing the dissolved gas in the oil sample to escape and obtain sample components.

[0048] In actual implementation, helium is used to bubble the oil sample. When helium is used for purging, its high diffusivity and low solubility enable it to bubble quickly and evenly distribute in the oil sample, effectively removing dissolved gases and harmful substances, reducing background interference and chemical reactions, and thus improving the accuracy of analysis. The inert properties of helium ensure that it will not react with the oil sample during the purging process, preventing the occurrence of oxidation reactions and maintaining the integrity of the sample. In addition, when helium is used as a carrier gas in analytical techniques such as gas chromatography, it can improve sensitivity and resolution, and its excellent thermal conductivity helps with temperature control.

[0049] In some optional embodiments, the flow rate of helium is configured to be 20 to 60 mL / min. This flow rate range can ensure that helium is effectively mixed and quickly purged in the oil sample, promote the timely removal of dissolved gases and impurities, and thus improve the purity and analysis accuracy of the sample. Secondly, the appropriate flow rate will not affect the capture of sample components, can avoid the loss of sample components, and will not cause bubble formation in the sample or interfere with the separation efficiency of gas chromatography. In addition, the flow rate adjustment is also related to the oxygen demand state and detection sensitivity of the analytical instrument. Too high a flow rate may lead to an increase in baseline noise, while too low a flow rate may affect the response speed of the analysis. Therefore, selecting a flow rate range of 20 to 60 mL / min can ensure the reliability and stability of the experimental results. Preferably, the flow rate of helium is configured to be 40 mL / min.

[0050] The longer the helium purge time, the higher the analysis reproducibility and sensitivity. However, considering the analysis time and work efficiency, the purge time should be as short as possible while meeting the analysis requirements. In actual implementation, it can be determined by measuring the recovery rate of the standard sample (usually required to be greater than 90%).

[0051] In some optional embodiments, purging may be achieved by mechanical oscillation or static purging.

[0052] S3. The sample components are adsorbed and captured, and the sample components are desorbed by heating.

[0053] The adsorption and capture of sample components is achieved through adsorbents. Adsorbents usually select materials that can efficiently adsorb target gases, such as porous materials such as activated carbon, molecular sieves, and MOFs. First, porous materials usually have a larger specific surface area and a more complex internal pore structure, which enables them to provide higher adsorption capacity, thereby processing more samples in a smaller space. This efficient adsorption capacity can greatly shorten the processing time. Secondly, compared with traditional separation technologies such as distillation or membrane separation, porous materials are often simpler and more flexible in operation, do not require complex equipment or a lot of energy consumption, and reduce production costs. In addition, due to the high selectivity of porous materials, they can be optimized for specific components, reducing the interference of pollutants and improving the purity and effectiveness of separation. The adsorbent is usually set in the adsorption tube body. After the dissolved gas is adsorbed, the adsorption tube body is heated to keep the sample assembly within a temperature range, thereby achieving desorption of the sample components. The desorption temperature can be set to 450°C at most. In actual implementation, the desorption temperature can be set to 200°C.

[0054] In other embodiments, low-temperature freezing capture may also be used for sample components that are not easily adsorbed.

[0055] S4. Analyze the sample components after desorption using an analytical instrument to obtain the dissolved gas concentration in the oil sample.

[0056] The desorbed gas enters the gas chromatograph with the carrier gas for separation and quantitative analysis. During the analysis, the purge gas should be turned off and the supply of helium should be stopped. In actual implementation, the gas path between the container 2 and the adsorption and capture part can be cut off by the switching valve 7 during the desorption of the sample components. On the one hand, it can prevent the sample components after desorption from flowing back, and on the other hand, it can prevent the excessive carrier gas in the analytical instrument from affecting the measurement results. The analysis objects usually include hydrogen (H2), methane (CH4), ethane (C2H6), ethylene (C2H4), acetylene (C2H2), carbon monoxide (CO) and carbon dioxide (CO2). According to the gas chromatography analysis results, combined with the Ostwald coefficient, the actual concentration of dissolved gas in the oil is calculated, and the status of the equipment is evaluated and potential faults are diagnosed based on these actual concentrations; the analysis results are recorded in the equipment file card for long-term monitoring and fault diagnosis.

[0057] The embodiment of the present application provides a method for rapid separation and enrichment of dissolved gas in transformer insulating oil. When an inert gas such as helium, nitrogen or argon is purged into the oil sample, a large number of bubbles can be quickly formed in the oil sample due to the relatively low solubility of the inert gas in the oil sample. The significantly increased gas surface pressure will destroy the gas balance in the oil sample, prompting the dissolved gas to escape into the inert gas to form bubbles; the purge gas can stir the oil sample, enhance the kinetic energy and convection of the gas molecules, and make more gas molecules escape from the oil sample into the purge gas; at the same time, the flow of the purge gas promotes the diffusion of the gas in the oil sample, further increasing the efficiency of gas escape; compared with the oil-gas separation process commonly used in the prior art using vacuum degassing, headspace degassing and oscillation degassing, the implementation process is simpler, takes less time, and has a higher separation efficiency of dissolved gas and oil sample. These escaped gas molecules are captured on the adsorbent and enriched after heating desorption. Finally, the desorbed gas is tested by an analytical instrument to determine the concentration of various dissolved gases in the oil sample, thereby evaluating the health of the transformer oil and the operating status of the equipment. This method not only improves the escape efficiency and enrichment effect of dissolved gases, but also ensures the accuracy and reliability of the analysis.

[0058] The method for rapid separation and enrichment of dissolved gas in transformer insulating oil provided by the above embodiment can shorten the time from about 30 minutes to within 5 minutes compared with the existing oil-gas separation method, and the efficiency is greatly improved; at the same time, by controlling the flow rate of the purging helium gas, the accuracy of the sample component analysis results can be ensured.

[0059] In some optional embodiments, the sample components are subjected to heat preservation treatment before being adsorbed and analyzed so as to keep the temperature of the sample components at 80-150°C.

[0060] Insulation treatment can ensure that the sample is heated evenly over a wide temperature range, avoiding component decomposition or chemical reaction caused by local overheating, and avoiding condensation of sample components, thereby maintaining the integrity of the sample and the accuracy of the analysis results. In addition, appropriate temperature can improve the solubility and stability of insoluble or volatile components, reduce the volatilization loss of components, and ensure uniform mixing of components and stability of reaction conditions during the analysis process. This can not only improve the accuracy and reproducibility of the analysis, but also prolong the stability of the sample and reduce the analysis errors caused by temperature fluctuations.

[0061] Second, as Figure 2 As shown, the present application provides a device for rapidly separating and enriching dissolved gases in transformer insulating oil, which is used to implement any one of the methods for rapidly separating and enriching dissolved gases in transformer insulating oil described in the first aspect, and comprises a container 2, a purge mechanism 1, a capture mechanism 4, a desorption mechanism 5, an analysis mechanism 6, an insulation mechanism and a controller.

[0062] The container 2 can be a glass container 2 for containing the oil sample. The container 2 has a gas inlet and a gas outlet.

[0063] The purge mechanism 1 is connected to the gas inlet of the container 2 and is used to supply gas to the container 2 in a purging manner; the purge mechanism 1 may include a gas source consisting of a gas cylinder, a pressure reducing valve, a flow meter and a gas purifier, and a purge system consisting of a gas distributor, a nozzle and a temperature control device, the gas cylinder is used to store helium, the pressure reducing valve is used to control the gas pressure of the helium introduced into the container 2, the flow meter is used to monitor the amount of helium introduced into the container 2, the gas purifier is used to purify the helium to ensure the purity of the helium introduced into the container 2, the gas distributor is connected to the gas cylinder, the nozzle is connected to the gas distributor, the nozzle passes through the gas inlet and is located in the container 2, the nozzle can also be replaced by a diffuser, the temperature control device is used to heat or keep the container 2 warm, and the temperature control device can be set as a commonly used heating jacket 3 or a water bath device.

[0064] The capture mechanism 4 is connected to the gas outlet of the container 2 and is used to capture the sample components escaping from the container 2 by adsorption; the capture mechanism 4 includes a cooling device, a temperature control device and a capture tube filled with an adsorbent, the cooling device can be set to a commonly used liquid nitrogen trap or a cooling water bath device, and the temperature control device is used to regulate the temperature of the capture tube so that the sample components are in a suitable temperature environment to ensure that the adsorption and capture process proceeds normally.

[0065] The desorption mechanism 5 is connected to the capture mechanism 4 to heat the capture mechanism 4, thereby desorbing the sample components; the desorption mechanism 5 can be set as a commonly used electric heating wire or hot air purge system, and the desorption mechanism 5 is equipped with a temperature control device and a monitoring device to accurately control the desorption temperature.

[0066] The analysis instrument is connected to the capture mechanism 4 and is used to automatically analyze the sample components.

[0067] The heat preservation mechanism is arranged on the connecting pipelines of each mechanism to keep the medium in the connecting pipelines warm or heat it.

[0068] The controller is respectively connected to the purge mechanism 1, the capture mechanism 4, the desorption mechanism 5, the analysis mechanism 6 and the insulation mechanism. The controller is equipped with a touch screen, a sensor and an actuator. The touch screen is used for human-computer interaction to facilitate the experimenter to adjust the parameters. The sensor is used to monitor the working parameters of each mechanism. The actuator is mainly a solenoid valve and a relay. For example, a switching valve 7 can be set between the container 2 and the capture mechanism 4, and between the capture mechanism 4 and the analytical instrument. The solenoid valve controls the action of the switching valve 7 to control the on-off of the gas path between the container 2 and the capture mechanism 4, and the on-off of the gas path between the capture mechanism 4 and the analytical instrument.

[0069] In addition, safety mechanisms may also be included. The safety mechanisms may include pressure relief valves, temperature sensors, emergency stop buttons and gas leak detectors to ensure safety during operation and prevent safety problems such as overpressure, overheating, gas leakage, etc.

[0070] The above specific embodiments illustrate the implementation methods of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Although the description of the present application will be introduced in conjunction with some embodiments, this does not mean that the features of this application are limited to the implementation methods. On the contrary, the purpose of introducing the application in conjunction with the implementation methods is to cover other options or modifications that may be extended based on the claims of the present application. In order to provide an in-depth understanding of the present application, the above description contains many specific details. The present application can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present application, some specific details will be omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0071] It should be noted that in this specification, similar numbers and letters represent similar items in the above figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in the subsequent figures. In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, and it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0072] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for rapidly separating and enriching dissolved gas in transformer insulating oil, characterized in that: The following steps are involved: a. Take out the oil sample from the transformer; b. Introduce helium / nitrogen / argon into the oil sample in a purging manner to bubble the oil sample, thereby allowing the dissolved gas in the oil sample to escape and obtain the sample components; c. Adsorb and capture sample components, and desorb the sample components by heating; d. Use analytical instruments to analyze the sample components after desorption to obtain the dissolved gas concentration in the oil sample.

2. The method for rapid separation and enrichment of dissolved gas in transformer insulating oil according to claim 1, characterized in that: In step b, helium is used to bubble the oil sample.

3. The method for rapid separation and enrichment of dissolved gas in transformer insulating oil according to claim 2, characterized in that: The flow rate of helium is configured to be 20-60 mL / min.

4. The method for rapid separation and enrichment of dissolved gas in transformer insulating oil according to claim 3, characterized in that: The flow rate of helium was configured to be 40 mL / min.

5. The method for rapid separation and enrichment of dissolved gas in transformer insulating oil according to claim 2, characterized in that: Place the container of the oil sample in the heating device and stir the oil sample using a magnetic stirring bar.

6. The method for rapid separation and enrichment of dissolved gas in transformer insulating oil according to claim 1, characterized in that: The sample components are subjected to heat preservation treatment before being adsorbed and analyzed so that the temperature of the sample components is maintained at 80-150°C.

7. The method for rapid separation and enrichment of dissolved gas in transformer insulating oil according to claim 1, characterized in that: In step b, mechanical oscillation or static purging is used to achieve purging.

8. The method for rapid separation and enrichment of dissolved gas in transformer insulating oil according to claim 1, characterized in that: The sample components are adsorbed by the porous material.

9. A device for rapidly separating and enriching dissolved gas in transformer insulating oil, used to implement the method for rapidly separating and enriching dissolved gas in transformer insulating oil according to any one of claims 1 to 8, characterized in that: include: Container for holding oil sample; a purge mechanism connected to the container and used to supply gas to the container in a purge manner; A capture mechanism connected to the container and used to capture sample components escaping from the container in an adsorption manner; a desorption mechanism connected to the trapping mechanism to heat the trapping mechanism, thereby desorbing the sample components; an analysis mechanism connected to the capture mechanism and used for automatically analyzing sample components; A heat preservation mechanism is provided on the connecting pipelines of each mechanism to keep the medium in the connecting pipelines warm or heat the medium; The controller is respectively connected with the purge mechanism, the capture mechanism, the desorption mechanism, the analysis mechanism and the heat preservation mechanism.

10. The device for rapid separation and enrichment of dissolved gas in transformer insulating oil according to claim 9, characterized in that: It also includes a sensor system, which is used to monitor the state parameters of the objects of action of the purging mechanism, the capturing mechanism, the desorption mechanism, the analyzing mechanism and the heat preservation mechanism. The controller adjusts the purging mechanism, the capturing mechanism, the desorption mechanism, the analyzing mechanism and the heat preservation mechanism according to the state parameters.

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