Vacuum unlimited gas capacity insulating oil gas separation device and method

Abstract

The application relates to a vacuum infinite-gas-volume insulating oil gas separation device and method, and relates to the field of power system automation. The device comprises a gas-liquid separation unit and a gas analysis module. The gas inlet end and the gas outlet end of a vacuum degassing chamber in the gas analysis module are connected with the gas-liquid separation unit; the first connecting end of the vacuum degassing chamber is connected with the inlet of a gas collection chamber through a sixth electromagnetic valve and a first gas equalization pump in sequence; the second connecting end of the vacuum degassing chamber is connected with the outlet of the gas collection chamber through a seventh electromagnetic valve; and a pressure sensor is arranged in the gas collection chamber. The oil degassing state in the application is a vacuum state, the vacuum degree is adjustable, and the adjustable range is 10KPa-101KPa. For the concentration of some micro-content gases (such as acetylene, ethane and ethylene) in transformer oil, only in the vacuum state can sufficient amount of the gases be degassed to meet the detection sensitivity of a rear-end detection system.

Description

Technical Field

[0001] This invention relates to the field of power system automation, and particularly to a vacuum unlimited gas volume insulating oil-gas separation device and method. Background Technology

[0002] Currently, an increasing number of installed power transformers are equipped with online oil gas monitoring systems. All newly installed large power transformers must also have such systems installed. These systems can continuously, in real-time, and automatically analyze the content and concentration growth rate of dissolved gases in insulating oil, enabling self-analysis and diagnosis of the transformer's operating status. The objects analyzed by these systems are the characteristic fault gases separated by the insulating oil gas separation device. The current methods for online separation of dissolved gases in insulating oil and their corresponding shortcomings are as follows:

[0003] (1) Membrane separation method, such as: Lianyungang Top Technology Development Co., Ltd. An organic membrane separation method for oil and gas recovery device and recovery method: China, CN111482060A. 2020-08-04; This method has a long equilibrium time and low degassing rate. This method uses a degassing membrane for oil and gas separation, but since the degassing membrane only allows gas molecules to pass through and oil molecules cannot pass through, one side of the membrane is a continuously circulating sample oil, and the gas dissolved in the oil slowly permeates through the degassing membrane to the other side of the membrane to achieve the purpose of degassing. This method has a very slow degassing rate and a very long separation time, generally requiring 4 hours. It has very high requirements for the circulating oil pump, which needs to operate at an irregular speed, does not meet the requirements of real-time online operation, and the micropores of the degassing membrane will be blocked by oil impurities and become unusable.

[0004] (2) Piston vacuum degassing method, such as: State Grid Fujian Electric Power Co., Ltd. A portable insulating oil gas content detection device and a sealing defect diagnosis method based on gas content: China, CN111220759A.2020-01-21; This method requires the use of components such as cylinders and oil cylinders with O-ring pistons to perform reciprocating motion. The cylinder reciprocates to draw a vacuum in the system. The sample oil enters the vacuum degassing chamber and the oil cylinder vacuum chamber. Gas is released from the oil. Then, the oil cylinder piston moves in the opposite direction to push out the gas. At the same time, the cylinder moves repeatedly to transfer the characteristic gas to the quantitative tube for gas analysis module detection and analysis. The disadvantages of this method are that the device structure is complex, the piston seal is prone to aging and cracking under the corrosive conditions of immersion in insulating oil, resulting in oil leakage in the system; and after the sample oil enters the high vacuum degassing chamber, a large amount of oil mist is generated, which, together with the extracted characteristic gas, is transferred into the quantitative tube of the gas analysis module by the cylinder, causing contamination of the gas analysis module components. In addition, this method cannot completely remove the influence of the sample oil and extracted sample gas remaining from the previous degassing process on the next degassing process, thus causing cross-influence.

[0005] (3) Headspace degassing method, such as: Hubei Xinyingtai System Technology Co., Ltd. A headspace degassing method and apparatus for oil-immersed equipment: China, CN112213267B. 2020-09-29; This method has low detection sensitivity. This method uses a fixed volume degassing chamber and uses a circulating air pump to blow air from the sample oil into the bottom of the degassing chamber. After passing through the sample oil, the air blown out into the air above the sample oil achieves the function of circulating gas and disturbing the sample oil. This method blows a large amount of air or carrier gas into the sample oil, causing the sample oil to reach saturation with gas, which seriously contaminates the sample oil. The dissolved oxygen will oxidize the insulating oil and affect its insulation performance. Therefore, it can only be discharged as waste oil, which is wasteful; Each time a fixed volume of oil participates in degassing, the small volume of sample oil results in very little degassing, which affects the detection accuracy of the gas analysis module.

[0006] (4) Vacuum pump type fixed volume vacuum degassing method, such as: Zhejiang Baorui Optoelectronic Technology Co., Ltd. A transformer oil vacuum degassing device: China, CN215962252U.2021-10-20; This method is similar to methods (2) and (3), but it still cannot completely remove the influence of the sample oil and sample gas remaining in the previous degassing process on the next degassing process, and the accuracy is low.

[0007] To address the aforementioned issues, existing patent literature, such as the invention patent published on April 20, 2016, entitled "Online Gas Separation Device and Wall-Mounted Analysis System for Variable Degassing Insulating Oil," discloses a technical solution that uses an intelligent oil circulation module to circulate the oil sample and an oil-gas balance module to balance the oil sample and characteristic gases. This oil-gas balance process does not generate oil mist and can be stopped at any time. It is automatically controlled by a control module, which adjusts the degassing rate according to the volume of the gas analysis module. Furthermore, it eliminates the need for purging and replacement of the entire system during secondary testing, reducing oil-gas separation time and improving detection efficiency. However, in practical applications, it has been found that this technical solution uses atmospheric pressure degassing, resulting in a low degassing rate. Online gas monitoring systems for transformer oil implemented using this principle or its supporting modules have low minimum detection limits (sensitivity) for gases in the oil, failing to meet the State Grid Corporation's technical requirement of a minimum detection limit of 0.1 ppm for acetylene (C2H2) in transformer oil. It also cannot meet the sensitivity requirements for detecting trace components in transformer oil used by most chromatographic spectrometers on the market. Summary of the Invention

[0008] To address the above problems, this invention provides a vacuum unlimited gas flow insulating oil-gas separation device and method that improves degassing speed, accelerates degassing time to improve degassing efficiency, thereby enhancing detection sensitivity, and is applicable to all chromatographic spectral detection minimum sensitivity requirements (within 0.5 ppm) on the market.

[0009] The technical solution of this invention is: a vacuum unlimited gas volume insulating oil-gas separation device, comprising:

[0010] A gas-liquid separation unit, wherein the gas-liquid separation unit is connected to electrical equipment; and

[0011] Gas analysis module, the gas analysis module includes:

[0012] A vacuum degassing chamber, wherein the inlet and outlet of the vacuum degassing chamber are respectively connected to a gas-liquid separation unit; and

[0013] The gas collecting chamber is connected to the inlet of the vacuum degassing chamber via a sixth solenoid valve and a first gas equalization pump. The second connection of the vacuum degassing chamber is connected to the outlet of the gas collecting chamber via a seventh solenoid valve. A pressure sensor is installed in the gas collecting chamber.

[0014] Specifically, the gas-liquid separation unit includes:

[0015] An oil-gas balance module, connected to an electrical device, extracts oil samples from the electrical device; its top is connected to the gas analysis module; and

[0016] An oil circulation module is provided, with one end connected to an oil-gas balance module and the other end connected to an electrical device, allowing the oil sample from the oil-gas balance module to flow into the electrical device.

[0017] Specifically, the oil and gas balance module includes:

[0018] A balancing container has its oil inlet connected to an electrical device, and its outlet connected to the gas analysis module's inlet via a second solenoid valve. The inlet is further connected to the gas analysis module's outlet via a third solenoid valve and a second gas equalization pump. An exhaust port is located between the second gas equalization pump and the third solenoid valve, and a fourth solenoid valve is located at the exhaust port.

[0019] A variable air chamber, the oil inlet of which is connected to the oil outlet of the balance container, and the oil outlet of which is connected to the oil circulation module.

[0020] Specifically, the variable air chamber includes a hydraulic cylinder, an inner bellows, or an outer bellows.

[0021] Specifically, a filter, a first solenoid valve, a heating pipe, and a flow valve are sequentially connected between the power equipment and the oil inlet of the balance container.

[0022] Specifically, the oil circulation module includes a fifth solenoid valve and a circulation pump connected in sequence;

[0023] The fifth solenoid valve is connected to the power equipment;

[0024] The circulating pump is connected to the oil outlet of the variable air chamber.

[0025] Specifically, the power equipment is an oil-immersed power equipment.

[0026] Specifically, a lower liquid level sensor is provided at the bottom of the inner cavity of the balance container, and an upper liquid level sensor is provided at the top of the inner cavity.

[0027] A vacuum unlimited gas flow insulating oil-gas separation method includes the following steps:

[0028] S100, before the oil sample flows, the sixth, seventh, second, and fourth solenoid valves are opened in advance, and the third solenoid valve is closed.

[0029] S200, start the gas equalization pump to extract the gas from the container and pipeline into the atmosphere;

[0030] S300: After creating a vacuum in the internal cavity, close the gas equalization pump, the fourth solenoid valve, the sixth solenoid valve, and the seventh solenoid valve, and open the second solenoid valve and the third solenoid valve.

[0031] S400 extracts oil samples from electrical equipment and injects them into a balance container. Characteristic gases separate from the oil samples and enter the upper space and degassing chamber of the balance container.

[0032] S500, turn on the second gas equalization pump, the characteristic gas enters the vacuum degassing chamber from the equalization container and then enters the equalization container again, and so on. The oil sample is also circulated throughout the process.

[0033] Specifically, in step S500, as the oil sample and characteristic gas circulate, the concentration of the characteristic gas in the upper space of the equilibrium container gradually reaches equilibrium with the concentration of the characteristic gas dissolved in the oil sample. At this time, the sixth solenoid valve is opened and the seventh solenoid valve is closed, and the first gas equilibrium pump starts to run, drawing the gas from the vacuum degassing chamber into the gas collecting chamber. At this time, the degassing chamber is in a vacuum state again, and the gas in the oil sample continues to be released.

[0034] Innovation of this invention:

[0035] 1. The volume of the variable gas chamber can be adjusted according to needs, with an adjustment range of 5-200ml, meeting the requirements of all chromatographic spectroscopic detections on the market. The volume ratio of the variable gas chamber to the balance tank is ≥1.

[0036] 2. In this case, the oil degassing process was carried out under vacuum, with an adjustable vacuum range (10KPa-101KPa). For some trace gases (such as acetylene, ethane, ethylene, etc.) in transformer oil, only under vacuum can a sufficient amount be degassed to meet the detection sensitivity of the downstream detection system. Degassing under normal pressure cannot meet the detection sensitivity of commercially available detection systems for trace gases below 0.1ppm.

[0037] 3. Adjusting the volume of the variable gas chamber, i.e. adjusting the oil level, can be achieved by adjusting the bellows to change the oil level, thereby changing the volume of gas contained in the balance container and thus changing the volume of the gas chamber. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of the present invention.

[0039] Figure 2 This is a schematic diagram of the structure when the variable air chamber is an inner bellows.

[0040] Figure 3 This is a schematic diagram of the structure when the variable air chamber is an external bellows.

[0041] Figure 4 This is a schematic diagram of a balance container structure.

[0042] Figure 5 This is a schematic diagram of the gas collection chamber structure;

[0043] In the diagram, 100 represents electrical equipment, and 110 represents a gas-liquid separation unit.

[0044] 200 is the vacuum degassing chamber, 210 is the air inlet, 212 is the gas filter, 213 is the sixth solenoid valve, 215 is the gas collecting chamber, 218 is the sensor, 219 is the seventh solenoid valve, 220 is the air outlet, 225 is the first gas equalization pump, and 230 is the second gas equalization pump.

[0045] 300 is the oil-gas balance module, 310 is the balance container, 314 is the air inlet, 315 is the air outlet, 316 is the upper liquid level sensor, 317 is the variable gas chamber, 318 is the variable gas chamber control unit, 319 is the lower liquid level sensor, 320 is the filter, 330 is the first solenoid valve, 335 is the heating element, 340 is the flow valve, 350 is the second solenoid valve, 360 is the third solenoid valve, and 370 is the fourth solenoid valve.

[0046] 400 is the oil circulation module, 410 is the circulation pump, and 430 is the fifth solenoid valve.

[0047] 500 is the control module. Detailed Implementation

[0048] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0049] The present invention is as follows Figure 1-5 As shown; a vacuum unlimited gas flow insulating oil-gas separator 101, comprising:

[0050] A gas-liquid separation unit 110 is connected to the power equipment 100 and controlled by the control module 500; and

[0051] Gas analysis module, the gas analysis module includes:

[0052] A vacuum degassing chamber 200, wherein the inlet end 210 and the outlet end 220 of the vacuum degassing chamber 200 are respectively connected to the gas-liquid separation unit 110; and

[0053] The first connection end of the vacuum degassing chamber 200 is connected to the inlet of the gas collecting chamber 215 via a gas filter 212, a sixth solenoid valve 213, and a first gas equalization pump 225 in sequence; the second connection end of the vacuum degassing chamber 200 is connected to the outlet of the gas collecting chamber 215 via a seventh solenoid valve 219; and a pressure sensor 218 is provided inside the gas collecting chamber 215.

[0054] The outlet 220 of the vacuum degassing chamber 200 is connected to the inlet 314, and the outlet 315 is connected to the inlet 210. A second solenoid valve 350 is located between the outlet 315 and the inlet 210, and a third solenoid valve 360 ​​is located between the outlet 220 and the inlet 314. The second gas equalization pump 230 circulates the characteristic gas. Specifically, in this embodiment, the second gas equalization pump 230 is located between the inlet 314 and the outlet 220, and is situated between the outlet 220 and the third solenoid valve 360, located on the entire gas circulation pipeline and providing power for the gas circulation.

[0055] Further specifying, the gas-liquid separation unit 110 includes:

[0056] An oil-gas balance module 300, connected to an electrical device 100, extracts oil samples from the electrical device 100; its top is connected to the gas analysis module; and

[0057] An oil circulation module 400 is connected at one end to an oil-gas balance module 300 and at the other end to an electrical device 100, allowing oil samples from the oil-gas balance module 300 to flow into the electrical device 100. A control module 500 controls the operation of each component in both the oil-gas balance module 300 and the oil circulation module 400.

[0058] Further specifying, the oil-gas balance module 300 includes:

[0059] A balancing container 310 has its oil inlet connected to the power equipment 100. Its outlet 315 is connected to the gas analysis module's inlet 210 via a second solenoid valve 350. Its inlet 314 is connected to the gas analysis module's outlet 220 via a third solenoid valve 360 ​​and a second gas equalization pump 230. An exhaust port is provided between the second gas equalization pump 230 and the third solenoid valve 360, and a fourth solenoid valve 370 is located at the exhaust port.

[0060] A variable gas chamber 317 has its inlet connected to the outlet of the balance container 310, and its outlet connected to the oil circulation module 400. The capacity of the variable gas chamber 317 is controlled by a variable gas chamber control unit 318. Its volume is changed via a retractable bellows, thereby adjusting the liquid level in the balance container 310 and thus changing the gas volume above the balance container 310, achieving the effect of volume regulation.

[0061] Further specifying, the variable gas chamber 317 includes one of the following configurations: a hydraulic cylinder, an inner bellows, or an outer bellows. The hydraulic cylinder controls the movement of a tension rod, and the inner and outer bellows, through the expansion and contraction of the bellows, change the volume of the incorporated liquid, thereby altering the liquid level in the container to achieve the desired gas volume. Figure 2-3 As shown, the inner corrugated pipe and the inside of the pipeline are corrugated, as are the outer corrugated pipe and the outside of the pipeline. Both types of corrugated pipes are adjustable in size and shape. The corrugated pipe material can be metal or polymer material, and it possesses the corrosion resistance of transformer oil.

[0062] Further specifying, the power equipment 100 and the oil inlet of the balance container 310 are provided with a filter 320, a first solenoid valve 330, a heating tube 335 and a flow valve 340 connected in sequence.

[0063] Further specified, the oil circulation module 400 includes a fifth solenoid valve 430 and a circulation pump 410 that circulates oil samples, which are connected in sequence.

[0064] The fifth solenoid valve 430 is connected to the power equipment 100;

[0065] The circulating pump 410 is connected to the oil outlet of the variable air chamber 317.

[0066] Furthermore, the power equipment 100 is an oil-immersed power equipment.

[0067] Further specified, the bottom of the inner cavity of the balance container 310 is provided with a lower liquid level sensor 319, and the top of the inner cavity is provided with an upper liquid level sensor 316.

[0068] The process of oil sample circulation in this case is as follows:

[0069] The oil sample enters the filter 320 from the power equipment 100. The filter 320 filters out impurities from the oil sample. The oil sample then passes through the first solenoid valve 330, the heating element 335, and the flow valve 340. The heating element 335 ensures a constant temperature, and the flow valve 340 is a constant pressure flow regulating valve that stabilizes the flow rate of the oil sample throughout the pipeline at a constant value. After passing through the flow valve 340, the oil sample enters the balance container 310 through the inlet, then flows into the variable gas chamber 317 from the outlet, and then enters the circulation pump 410, which provides power for the flow of the oil sample. Finally, it returns to the power equipment 100 through the fifth solenoid valve 430.

[0070] A vacuum unlimited gas flow insulating oil-gas separation method includes the following steps:

[0071] Reference Figure 1 As shown, Figure 1 The arrows indicate the flow direction of the characteristic gas and oil, and the circulation of the characteristic gas proceeds as follows:

[0072] S100, before the oil sample flows, the sixth solenoid valve 213, the seventh solenoid valve 219, the second solenoid valve 350 and the fourth solenoid valve 370 are opened in advance, and the third solenoid valve 360 ​​is closed.

[0073] S200, start the gas equalization pump 230 to extract the gas in the container and pipeline into the atmosphere;

[0074] S300, after creating a vacuum in the internal cavity, close the gas equalization pump 230, the fourth solenoid valve 370, the sixth solenoid valve 213 and the seventh solenoid valve 219, and open the second solenoid valve 350 and the third solenoid valve 360.

[0075] S400, an oil sample is extracted from the power equipment 100 and injected into the balance container 310. The characteristic gas separates from the oil sample and enters the upper space of the balance container 310 and the degassing chamber 200.

[0076] S500, the second gas equalization pump 230 is turned on. The characteristic gas enters the vacuum degassing chamber 200 from the balance container 310 and then enters the balance container 310 again, thus circulating. The oil sample is also circulated throughout the process.

[0077] Further defining step S500, as the oil sample and characteristic gas circulate, the concentration of the characteristic gas in the upper space of the equilibrium container 310 gradually reaches equilibrium with the concentration of the characteristic gas dissolved in the oil sample. At this point, the sixth solenoid valve 213 is opened, the seventh solenoid valve 219 is closed, and the first gas equilibrium pump 225 starts operating, drawing gas from the vacuum degassing chamber 200 into the gas collecting chamber 215. The vacuum degassing chamber 200 is then under vacuum again, and gas continues to be released from the oil sample. Simultaneously, the volume of the variable gas chamber is adjusted to regulate the volume of the gas space in the equilibrium container 310, thereby adjusting the vacuum level within the equilibrium container, thus controlling the degassing rate and amount of gas in the oil to meet the detection sensitivity requirements of the detection system. The method for adjusting the variable gas chamber volume can be a bottom-connected hydraulic cylinder (…). Figure 1 ), external corrugated pipe method ( Figure 2 ), internal bellows method ( Figure 3 By controlling the movement of the hydraulic cylinder, the outer bellows, and the inner bellows, the volume of the upper degassing space is changed, thereby controlling and adjusting the vacuum level of the vacuum degassing chamber.

[0078] The vacuum unlimited gas volume insulating oil-gas separation device realized by the technology of this invention can complete oil-gas balance within 20 minutes. It has a short oil-gas separation time, high degassing rate, and adjustable degassing volume (from 30ml to more than 1L). It can meet the requirements of the detection system for degassing volume and the technical requirements for the minimum detection limit of gas in oil, regardless of whether the detection system is based on chromatography or spectroscopy.

[0079] This case Figure 5 This is a schematic diagram of the gas collection chamber, which includes a gas collection chamber structure 215 and a pressure sensor 218. The volume of the gas collection chamber can be changed by replacing the gas collection chamber. The gas collection chamber has an air outlet for connection to other devices.

[0080] Regarding the information disclosed in this case, the following points need to be clarified:

[0081] 1. The accompanying drawings of the embodiments disclosed in this case only involve the structures involved in the embodiments disclosed in this case; other structures can refer to the general design.

[0082] 2. Where there is no conflict, the embodiments and features disclosed in this case can be combined with each other to obtain new embodiments;

[0083] The above are merely specific embodiments disclosed in this case, but the scope of protection of this disclosure is not limited thereto. The scope of protection disclosed in this case shall be determined by the scope of protection of the claims.

Claims

1. A vacuum unlimited gas flow insulating oil-gas separation device, comprising a power equipment (100), a gas-liquid separation unit (110), and a gas analysis module connected in sequence, characterized in that, The gas-liquid separation unit (110) includes: An oil-gas balance module (300) is connected to an electrical device (100) to extract oil samples from the electrical device (100); its top is connected to the gas analysis module; the oil-gas balance module (300) includes a variable gas chamber (317) and a balance container (310) connected in sequence; the oil inlet of the variable gas chamber (317) is connected to the oil outlet of the balance container (310), and its oil outlet is connected to the electrical device (100); The gas analysis module includes: A vacuum degassing chamber (200), wherein the inlet (210) and outlet (220) of the vacuum degassing chamber (200) are respectively connected to a gas-liquid separation unit (110); and The first connection end of the vacuum degassing chamber (200) is connected to the inlet of the gas collecting chamber (215) via a sixth solenoid valve (213) and a first gas equalization pump (225); the second connection end of the vacuum degassing chamber (200) is connected to the outlet of the gas collecting chamber (215) via a seventh solenoid valve (219); a pressure sensor (218) is provided inside the gas collecting chamber (215). The oil inlet of the balancing container (310) is connected to the power equipment (100), and its outlet (315) is connected to the gas inlet (210) of the gas analysis module through the second solenoid valve (350). Its inlet (314) is connected to the gas outlet (220) of the gas analysis module through the third solenoid valve (360) and the second gas equalization pump (230) in sequence. An exhaust port is provided between the second gas equalization pump (230) and the third solenoid valve (360), and a fourth solenoid valve (370) is provided at the exhaust port. The gas-liquid separation unit (110) also includes an oil circulation module (400), one end of which is connected to the variable gas chamber (317) and the other end is connected to the power equipment (100), so that the oil sample from the oil-gas balance module (300) flows into the power equipment (100); The oil circulation module (400) includes a fifth solenoid valve (430) and a circulation pump (410) connected in sequence. The fifth solenoid valve (430) is connected to the power equipment (100); The circulating pump (410) is connected to the oil outlet of the variable air chamber (317); The oil sample enters the filter (320) from the power equipment (100), and then passes through the first solenoid valve (330), the heating tube (335), and the flow valve (340). The heating tube (335) ensures a constant temperature, and the flow valve (340) is a constant pressure flow regulating valve that stabilizes the flow rate of the oil sample in the entire pipeline at a constant value. After passing through the flow valve (340), the oil sample enters the balance container (310) through the oil inlet, and then flows into the variable gas chamber (317) from the oil outlet. Then it enters the circulation pump (410), which provides power for the flow of the oil sample. Finally, it returns to the power equipment (100) through the fifth solenoid valve (430). The volume adjustment range of the variable gas chamber (317) is 5-200ml, and the volume ratio with the balance container (310) is ≥1. The vacuum degree adjustment range of the vacuum degassing chamber (200) is 10KPa-101KPa.

2. The vacuum unlimited gas volume insulating oil-gas separation device according to claim 1, characterized in that, The variable air chamber (317) includes a hydraulic cylinder, an inner bellows, or an outer bellows.

3. The vacuum unlimited gas volume insulating oil-gas separation device according to claim 1, characterized in that, A filter (320), a first solenoid valve (330), a heating tube (335), and a flow valve (340) are connected in sequence between the oil inlet of the power equipment (100) and the balance container (310).

4. The vacuum unlimited gas volume insulating oil-gas separation device according to claim 1, characterized in that, The power equipment (100) is an oil-immersed power equipment.

5. A vacuum unlimited gas flow insulating oil-gas separation device according to claim 1, characterized in that, The bottom of the inner cavity of the balance container (310) is provided with a lower liquid level sensor (319), and the top of the inner cavity is provided with an upper liquid level sensor (316).

6. A method for separating vacuum insulated oil and gas with unlimited gas flow, comprising the vacuum insulated oil and gas separation device as described in claim 1, characterized in that, Includes the following steps: S100, before the oil sample flows, the sixth solenoid valve (213), the seventh solenoid valve (219), the second solenoid valve (350) and the fourth solenoid valve (370) are opened in advance, and the third solenoid valve (360) is closed. S200, start the gas equalization pump (230) to extract the gas in the container and pipeline into the atmosphere; S300, after creating a vacuum in the internal cavity, close the gas equalization pump (230), the fourth solenoid valve (370), the sixth solenoid valve (213) and the seventh solenoid valve (219), and open the second solenoid valve (350) and the third solenoid valve (360). S400, an oil sample is extracted from the power equipment (100) and injected into the balance container (310). The characteristic gas is separated from the oil sample and enters the upper space and degassing chamber (200) of the balance container (310). S500, the second gas equalization pump (230) is turned on. The characteristic gas enters the vacuum degassing chamber (200) from the balance container (310) and then enters the balance container (310) again, thus circulating. The oil sample is also circulated throughout the process. In step S500, as the oil sample and characteristic gas circulate, the concentration of characteristic gas in the upper space of the equilibrium container (310) gradually reaches equilibrium with the concentration of characteristic gas dissolved in the oil sample. At this time, the sixth solenoid valve (213) is opened and the seventh solenoid valve (219) is closed. The first gas equalization pump (225) starts to run, drawing the gas from the vacuum degassing chamber (200) into the gas collecting chamber (215). At this time, the degassing chamber (200) is in a vacuum state again, and the gas in the oil sample continues to be released.

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