Insulating oil treatment device for research laboratories

Abstract

The utility model discloses an insulating oil processing device for scientific research laboratory relates to insulating oil processing technical field, and insulating oil processing device includes oil filter and oil storage tank, and the oil filter includes a circulating oil circuit, and the circulating oil circuit includes the three -way valve of head -tail intercommunication, oil inlet pump, coarse filter, heater, vacuum separation jar, oil outlet pump and fine filter subassembly, and the three -way valve includes first inlet, second inlet and export, and the first inlet intercommunication fine filter subassembly, and the export intercommunication oil inlet pump, and fine filter subassembly includes the first branch and second branch of parallelly connected arrangement, and first valve, first fine filter and second valve are set up in proper order on the first branch, and third valve, second fine filter and fourth valve are set up in proper order on the second branch, and the position between fine filter subassembly and three -way valve on the circulating oil circuit is provided with the oil drain valve, and the oil storage tank is provided with the oil filling valve, and the oil filling valve is connected in the second inlet, can effectively improve the processing efficiency and adaptability of insulating oil, and guarantee the accuracy of experimental result.

Description

Technical Field

[0001] This utility model relates to the field of insulating oil treatment technology, and in particular to an insulating oil treatment device for scientific research laboratories. Background Technology

[0002] In power systems, transformers are critical equipment, and the insulating oil inside plays a vital role. Insulating oil not only effectively isolates the high-voltage electrodes and grounding components inside the transformer, preventing electrical breakdown and ensuring safe and stable operation, but it also has excellent heat dissipation properties, effectively dissipating the heat generated during operation and preventing damage from overheating. This extends the transformer's service life and ensures reliable power supply to the power system.

[0003] Given the crucial role of insulating oil in power equipment such as transformers, in-depth research on it is of paramount importance. By studying the properties, aging patterns, and purification methods of insulating oil, we can better understand its performance under different operating conditions, providing theoretical support and technical assurance for the safe operation of power equipment. Furthermore, this research will contribute to the development of more efficient and reliable insulating oil products, thereby improving the overall performance and stability of power systems.

[0004] For scientific research laboratories, the processing equipment used for insulating oil research has special requirements. Laboratory space is relatively limited, necessitating a smaller insulating oil processing device to better adapt to the laboratory environment. Simultaneously, the diverse experimental projects in laboratories involve different types of insulating oil and varying experimental conditions, requiring the insulating oil processing device to flexibly adapt to various experimental scenarios to meet the diverse needs of scientific research.

[0005] However, existing insulating oil treatment devices are typically simple, single-pass processing systems with limited adaptability. They cannot achieve efficient, multi-round deep circulation purification of the same batch of insulating oil samples, making it difficult to meet the purification requirements of insulating oil under different experimental conditions. Furthermore, existing insulating oil treatment devices usually only have one type of fine filter. When experiments involve different types of insulating oil, the existing devices typically require shutdown and manual replacement of the fine filter element, leading to experimental interruptions. This process is not only time-consuming and labor-intensive, reducing the processing efficiency of the insulating oil treatment device, but may also cause cross-contamination of pipelines, interfering with experimental results. Utility Model Content

[0006] The main purpose of this invention is to propose an insulating oil treatment device for scientific research laboratories, aiming to solve the technical problems of the single treatment mode and poor adaptability of existing insulating oil treatment devices.

[0007] To achieve the above objectives, the insulating oil treatment device for scientific research laboratories proposed in this utility model includes an oil filter and an oil storage tank. The oil filter includes a circulating oil circuit, which includes a three-way valve, an oil inlet pump, a coarse filter, a heater, a vacuum separation tank, an oil outlet pump, and a fine filter assembly connected in sequence. The three-way valve includes a first inlet, a second inlet, and an outlet. The first inlet is connected to the fine filter assembly, and the outlet is connected to the oil inlet pump. The fine filter assembly includes a first branch and a second branch arranged in parallel. The first branch is provided with a first valve, a first fine filter, and a second valve in sequence, and the second branch is provided with a third valve, a second fine filter, and a fourth valve in sequence. An oil drain valve connected to an external oil tank is provided on the circulating oil circuit between the fine filter assembly and the three-way valve. The oil storage tank is provided with an oil filling valve, which is connected to the second inlet.

[0008] In one embodiment, the oil injection valve is located at the bottom of the oil storage tank, a vacuum valve is located at the top of the oil storage tank, and a plurality of needle-type oil sample valves are spaced apart along the height of the oil storage tank.

[0009] In one embodiment, a top plate and a bottom plate are respectively installed on the top and bottom of the oil storage tank. The top plate can support another oil storage tank and can be bolted to the bottom plate of the other oil storage tank.

[0010] In one embodiment, the oil filter further includes a condenser, and the vacuum separation tank has an oil drain port and an exhaust port, the oil drain port being connected to the oil pump and the exhaust port being connected to the condenser.

[0011] In one embodiment, the oil filter further includes a degassing cylinder, the condenser is connected to the degassing cylinder, the bottom of the degassing cylinder has a drain port, and a rubber plug is provided at the drain port.

[0012] In one embodiment, a sampling valve is provided on the circulating oil line at a position between the fine filter assembly and the drain valve.

[0013] In one embodiment, a first check valve is provided on the circulating oil line between the coarse filter and the heater, and a second check valve is provided on the circulating oil line between the oil outlet pump and the fine filter assembly.

[0014] In one embodiment, the insulating oil treatment device further includes a frame and a base, the frame being connected to the base, the oil filter being mounted on the base and located within the frame, a plurality of rollers being spaced apart at the bottom of the base, and a lifting lug being connected to the top of the frame.

[0015] In one embodiment, a temperature sensor is installed near the heater in the circulating oil circuit, a first pressure sensor and a second pressure sensor are installed on the first branch and the second branch, respectively, a vacuum sensor is installed in the vacuum separation tank, and a flow meter is installed in the circulating oil circuit between the fine filter assembly and the oil drain valve.

[0016] In one embodiment, both the inlet pump and the outlet pump are variable frequency adjustable pumps.

[0017] The insulating oil treatment device for scientific research laboratories proposed in this utility model has a circulating oil circuit set up in the oil filter. The coarse filter, heater, vacuum separation tank, oil pump and fine filter assembly in the oil filter are connected end to end in sequence. The first inlet of the three-way valve is connected to the fine filter assembly, the second inlet of the three-way valve is connected to the oil storage tank, and the outlet of the three-way valve is connected to the coarse filter. This allows the oil filter to not only filter and purify the insulating oil in the oil storage tank, but also to recirculate the insulating oil that has been treated by the circulating oil circuit. This ensures that the insulating oil meets the experimental requirements under different conditions and has good adaptability. The fine filtration assembly includes a first fine filter and a second fine filter. The first fine filter includes a first filter element for fine filtration of mineral-based insulating oil, and the second fine filter includes a second filter element for fine filtration of grease-based insulating oil. By connecting the first and second fine filters in parallel, the fine filtration assembly can perform fine filtration of two different types of insulating oil simply by opening and closing the first, second, third, and fourth valves, without the need to replace the filter elements. This enables efficient switching of the fine filtration process, ensuring continuous operation of the insulating oil treatment device and greatly improving its processing efficiency and adaptability. In addition, the first and second branches do not interfere with each other, avoiding cross-contamination between different types of insulating oil and effectively ensuring the accuracy of experimental results. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 A connection diagram of an embodiment of the insulating oil treatment device for scientific research laboratories provided by this utility model;

[0020] Figure 2 A schematic diagram of the structure of an embodiment of the insulating oil treatment device for scientific research laboratories provided by this utility model;

[0021] Figure 3 A schematic diagram of the structure of an embodiment of the oil storage tank of the insulating oil treatment device for scientific research laboratories provided by this utility model.

[0022] Explanation of icon numbers:

[0023] 10. Oil filter; 11. Three-way valve; 12. Oil inlet pump; 13. Coarse filter; 14. Heater; 15. Vacuum separator; 16. Oil outlet pump; 17. Fine filter assembly; 171. First valve; 172. First fine filter; 173. Second valve; 174. Third valve; 175. Second fine filter; 176. Fourth valve; 18. Oil drain valve; 19. Condenser; 20. Degassing cylinder; 21. Sampling valve; 22. First check valve; 23. Second check valve; 24. Frame; 241. Lifting lug; 25. Base; 251. Roller; 26. Temperature sensor; 27. First pressure sensor; 28. Second pressure sensor; 29. ​​Vacuum sensor; 30. Flow meter; 40. Oil storage tank; 41. Oil injection valve; 42. Vacuum valve; 43. Needle oil sample valve; 44. Top plate; 45. Bottom plate; 100. External oil drum.

[0024] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0026] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0027] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0028] Existing insulating oil treatment devices are typically simple, single-pass processing systems with limited adaptability. They cannot achieve efficient, multi-round deep circulation purification of the same batch of insulating oil samples, making it difficult to meet the purification requirements of insulating oil under different experimental conditions. Furthermore, existing insulating oil treatment devices usually only have one type of fine filter. When experiments involve different types of insulating oil, the existing devices typically require shutdown and manual replacement of the fine filter element, leading to experimental interruptions. This process is not only time-consuming and labor-intensive, reducing the processing efficiency of the insulating oil treatment device, but also may cause cross-contamination of pipelines, interfering with experimental results.

[0029] This utility model proposes an insulating oil treatment device for scientific research laboratories, including an oil filter 10 and an oil storage tank 40. The oil filter 10 includes a circulating oil circuit, which includes a three-way valve 11, an oil inlet pump 12, a coarse filter 13, a heater 14, a vacuum separation tank 15, an oil outlet pump 16, and a fine filter assembly 17 connected in sequence. The three-way valve 11 includes a first inlet, a second inlet, and an outlet. The first inlet is connected to the fine filter assembly 17, and the outlet is connected to the oil inlet pump 12. The fine filter assembly 17 includes a first branch and a second branch arranged in parallel. The first branch is provided with a first valve 171, a first fine filter 172, and a second valve 173 in sequence. The second branch is provided with a third valve 174, a second fine filter 175, and a fourth valve 176 in sequence. An oil drain valve 18 is provided on the circulating oil circuit between the fine filter assembly 17 and the three-way valve 11, which is connected to an external oil tank 100. The oil storage tank 40 is provided with an oil injection valve 41, which is connected to the second inlet.

[0030] Please see Figure 1In the insulating oil treatment device for scientific research laboratories proposed in this utility model, the oil storage tank 40 stores insulating oil, and the oil filter 10 can filter and purify the insulating oil. The oil storage tank 40 is connected to the circulating oil circuit in the oil filter 10 through the second inlet of the three-way valve 11, and the circulating oil circuit is equipped with an oil drain valve 18 for connecting to the external oil tank 100. The insulating oil in the oil storage tank 40 can flow into the circulating oil circuit under the pumping of the oil inlet pump 12, and then pass through the coarse filter 13, heater 14, vacuum separation tank 15, oil outlet pump 16 and fine filter assembly 17 in sequence, and then be discharged out of the circulating oil circuit through the oil drain valve 18 until it enters the external oil tank 100. The coarse filter 13 performs preliminary filtration of the insulating oil. The heater 14 heats the insulating oil to improve its subsequent purification efficiency. The vacuum separator allows water to evaporate and gas to escape from the insulating oil under negative pressure, achieving deep dehydration and degassing. The oil pump 16 provides power to the circulating oil, ensuring smooth flow. Finally, the fine filter assembly 17 performs fine filtration, achieving filtration and purification. The first inlet of the three-way valve 11 connects to the fine filter assembly 17. When the insulating oil after fine filtration by the fine filter assembly 17 does not meet the experimental requirements, the drain valve 18 is closed, allowing the insulating oil to continue flowing into the circulating oil through the first inlet for further filtration and purification, thus achieving multiple treatments of the insulating oil. The fine filtration assembly 17 includes a first branch and a second branch connected in parallel. A first fine filter 172 and a second fine filter 175 are respectively installed on the first and second branches. The first fine filter 172 and the second fine filter 175 are respectively suitable for fine filtration of mineral-based insulating oil and grease-based insulating oil. By opening the first valve 171 and the second valve 173 and closing the third valve 174 and the fourth valve 176, the insulating oil flowing from the oil pump 16 can flow into the first branch and undergo fine filtration through the first fine filter 172. Similarly, by closing the first valve 171 and the second valve 173 and opening the third valve 174 and the fourth valve 176, the insulating oil flowing from the oil pump 16 can flow into the second branch and undergo fine filtration through the second fine filter 175. It should be noted that... Figure 1 The dashed box in the figure only indicates the range of the fine filter component 17, and does not indicate the specific structure of the fine filter component 17.

[0031] The insulating oil treatment device for scientific research laboratories proposed in this utility model has a circulating oil circuit set in the oil filter 10. The coarse filter 13, heater 14, vacuum separation tank 15, oil pump 16 and fine filter assembly 17 in the oil filter 10 are connected end to end in sequence. The first inlet of the three-way valve 11 is connected to the fine filter assembly 17, the second inlet of the three-way valve 11 is connected to the oil storage tank 40, and the outlet of the three-way valve 11 is connected to the coarse filter 13. This allows the oil filter 10 to not only filter and purify the insulating oil in the oil storage tank 40, but also to recirculate the insulating oil that has been treated by the circulating oil circuit. This ensures that the insulating oil meets the experimental requirements under different conditions and has good adaptability. The fine filtration assembly 17 includes a first fine filter 172 and a second fine filter 175. The first fine filter 172 includes a first filter element for fine filtration of mineral-based insulating oil, and the second fine filter 175 includes a second filter element for fine filtration of grease-based insulating oil. By connecting the first fine filter 172 and the second fine filter 175 in parallel, the fine filtration assembly 17 can perform fine filtration of two different types of insulating oil simply by opening and closing the first valve 171, the second valve 173, the third valve 174, and the fourth valve 176, without the need to replace the filter elements. This enables efficient switching of the fine filtration process, ensuring continuous operation of the insulating oil treatment device and greatly improving its processing efficiency and adaptability. In addition, the first branch and the second branch do not interfere with each other, avoiding cross-contamination between different types of insulating oil and effectively ensuring the accuracy of experimental results.

[0032] It should be noted that the coarse filter 13, heater 14, vacuum separator 15, oil pump 16, first fine filter 172 and second fine filter 175 all adopt existing technology, the circulating oil circuit uses DN25 pipes, and the oil filter 10 and the oil storage tank 40 are connected by DN25 stainless steel corrugated pipes.

[0033] Please see Figure 3 In one embodiment, an oil injection valve 41 is located at the bottom of the oil storage tank 40, facilitating the outflow of insulating oil from the tank. A vacuum valve 42 is located at the top of the tank, allowing for vacuuming from the top to maintain a low pressure and prevent contamination of the insulating oil by air, thus ensuring its purity and quality. Multiple needle-type oil sampling valves 43 are spaced along the height of the tank, enabling sampling and analysis of insulating oil at different heights. This facilitates understanding the distribution of the insulating oil within the tank and the characteristics of each oil sample, providing more reliable data for scientific research. It should be noted that the needle-type oil sampling valves 43 utilize existing technology, and both the vacuum valve 42 and the oil injection valve 41 are DN25 ball valves.

[0034] In one embodiment, a top plate 44 and a bottom plate 45 are respectively installed on the top and bottom of the oil storage tank 40. The top plate 44 can support another oil storage tank 40 and can be bolted to the bottom plate 45 of the other oil storage tank 40.

[0035] Please continue reading Figure 3 The top and bottom of the oil storage tank 40 are horizontally positioned via a top plate 44 and a bottom plate 45, respectively, allowing multiple oil storage tanks 40 to be stacked. When one oil storage tank 40 is stacked on top of another, the bottom plate 45 of the upper oil storage tank 40 is bolted to the top plate 44 of the lower oil storage tank 40. Installing top plates 44 and bottom plates 45 on the oil storage tanks 40 facilitates the stacking of multiple oil storage tanks. The bolted connection between the top plates 44 and bottom plates 45 enables the detachable connection of multiple oil storage tanks 40, allowing for flexible combination of the oil storage tanks 40 according to the required amount of insulating oil, while ensuring the connection stability between adjacent oil storage tanks 40. It can be noted that casters can be installed under the bottom plate 45 of the bottommost oil storage tank 40 to facilitate the movement of unused oil storage tanks 40 for storage elsewhere, saving laboratory space.

[0036] In one embodiment, the oil filter 10 further includes a condenser 19, and the vacuum separation tank 15 has an oil drain port and an exhaust port, the oil drain port being connected to the oil pump 16, and the exhaust port being connected to the condenser 19.

[0037] Please see Figure 1 It should be noted that the vacuum separator 15 is connected between the heater 14 and the oil pump 16. After the insulating oil heated by the heater 14 enters the vacuum separator 15, the vacuum separator 15 separates the impurity gases and moisture in the insulating oil from the insulating oil. The impurity gases and moisture are discharged to the condenser 19 through the exhaust port, while the purified insulating oil is discharged from the vacuum separator 15 through the oil drain port to continue subsequent purification and recycling. It can be noted that the condenser 19 adopts the existing technology of a condenser 19 with a multi-stage Roots pump.

[0038] In one embodiment, the oil filter 10 further includes a degassing cylinder 20, a condenser 19 connected to the degassing cylinder 20, and a drain port at the bottom of the degassing cylinder 20, with a rubber plug provided at the drain port.

[0039] Furthermore, after the condenser 19 condenses the water vapor in the gas discharged from the vacuum separator 15 into liquid water, the condensed liquid, along with the uncondensed gas, is sent to the degassing cylinder 20. The degassing cylinder 20 further separates and processes the condensed liquid and the uncondensed gas. A drain port with a rubber plug is provided at the bottom of the degassing cylinder 20, allowing impurities accumulated inside the degassing cylinder 20 and the condensed wastewater to be discharged. The rubber plug can also be used to seal the drain port when necessary, preventing leakage of internal liquid and gas during normal operation, ensuring a stable internal environment within the degassing cylinder 20, and facilitating subsequent treatment of residual oil entering the degassing cylinder 20.

[0040] In one embodiment, a sampling valve 21 is provided on the circulating oil line between the fine filter assembly 17 and the drain valve 18.

[0041] Please see Figure 1 By setting a sampling valve 21 between the fine filter assembly 17 and the oil drain valve 18, the insulating oil flows to the sampling valve 21 after passing through the coarse filter 13, heater 14, vacuum separation tank 15, oil pump 16 and fine filter assembly 17 in a purification cycle. The sampling valve 21 can sample the insulating oil after one purification cycle and determine whether to continue the next purification cycle based on the state information of the insulating oil, so as to ensure that the insulating oil meets the requirements under different experimental conditions.

[0042] In one embodiment, a first check valve 22 is installed in the circulating oil circuit between the coarse filter 13 and the heater 14. The function of the first check valve 22 is to ensure that the insulating oil can only flow in one direction, from the coarse filter 13 to the heater 14, preventing the oil from flowing back under pressure fluctuations or other abnormal conditions. This avoids impurities from re-entering the already filtered oil circuit and ensures the stability of the filtration effect. The first check valve 22 effectively prevents oil backflow, ensuring the unidirectionality of the oil circuit and providing a pure oil base for subsequent heating treatment. A second check valve 23 is installed in the circulating oil circuit between the oil outlet pump 16 and the fine filter assembly 17. The second check valve 23 ensures that the insulating oil can smoothly enter the fine filter assembly 17 after being pressurized by the oil outlet pump 16. At the same time, it prevents the oil from flowing back when the oil outlet pump 16 stops working or malfunctions, avoiding damage to the oil outlet pump 16, and also preventing oil backflow from affecting the stability of the entire circulating oil circuit. The second check valve 23 further ensures the one-way nature of the oil circuit, ensuring smooth flow of oil in the circulating oil circuit and improving the reliability and safety of the entire system.

[0043] In one embodiment, the insulating oil treatment device further includes a frame 24 and a base 25. The frame 24 is connected to the base 25. The oil filter 10 is installed on the base 25 and located inside the frame 24. A plurality of rollers 251 are installed at intervals on the bottom of the base 25, and a lifting lug 241 is connected to the top of the frame 24.

[0044] Please see Figure 2 It can be noted that the insulating oil treatment device used in scientific research laboratories is typically smaller in size compared to that used in general industrial applications. The oil filter 10 is mounted on the base 25 and located within the frame 24. The base 25 provides stable support for the oil filter 10, while the frame 24 surrounds and protects it. Multiple rollers 251 are spaced apart at the bottom of the base 25, allowing the oil filter 10 to be easily moved between different locations according to spatial layout or experimental needs. Lifting lugs 241 are connected to the top of the frame 24, enabling the entire insulating oil treatment device to be lifted using lifting equipment or other tools, facilitating transportation and effectively improving the flexibility and applicability of the device.

[0045] In one embodiment, a temperature sensor 26 is installed near the heater 14 in the circulating oil circuit, a first pressure sensor 27 and a second pressure sensor 28 are installed on the first branch and the second branch respectively, a vacuum sensor 29 is installed in the vacuum separator 15, and a flow meter 30 is installed in the circulating oil circuit between the fine filter assembly 17 and the drain valve 18.

[0046] Understandably, temperature sensor 26 is used to obtain the operating temperature of insulating oil heated by heater 14, first pressure sensor 27 is used to obtain the fluid pressure in the first branch, second pressure sensor 28 is used to obtain the fluid pressure in the second branch, vacuum sensor 29 is used to obtain the vacuum degree in vacuum separation tank 15, and flow meter 30 is used to obtain the liquid flow rate in circulating oil circuit.

[0047] It should be noted that the insulating oil treatment device also includes a processor, a display terminal, and a communication module. The vacuum separation tank 15 is also equipped with a solenoid valve. The processor is electrically connected to the temperature sensor 26, the first pressure sensor 27, the second pressure sensor 28, the vacuum sensor 29, the flow meter 30, the solenoid valve, and the communication module. The processor can communicate with external remote terminals such as mobile phones through the communication module to realize real-time remote monitoring of operating temperature, fluid pressure, vacuum degree, inlet and outlet oil flow, instantaneous flow, time period flow, total flow, and the working status of vacuum pump, oil inlet pump 12, oil outlet pump 16, vacuum separation tank 15, etc., thereby monitoring the operating status of the insulating oil treatment device, facilitating timely handling of abnormal operating conditions, and improving the intelligence level of the insulating oil treatment device.

[0048] In one embodiment, both the inlet pump 12 and the outlet pump 16 are variable frequency adjustable oil pumps.

[0049] Furthermore, the processor is electrically connected to the inlet pump 12 and the outlet pump 16. The remote terminal can adjust the rotation speed of the inlet pump 12 and the outlet pump 16 through the processor, thereby adjusting the flow rate in the circulating oil circuit, which facilitates precise control of experimental parameters and meets the experimental requirements under different conditions.

[0050] In one embodiment, a temperature-sensitive fire extinguisher is installed near the heater 14. When the temperature is detected to be too high, the temperature-sensitive fire extinguisher automatically releases extinguishing agent to extinguish the fire, ensuring the safe operation of the insulating oil treatment device.

[0051] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. An insulating oil treatment device for scientific research laboratories, characterized in that, include: An oil filter machine includes a circulating oil circuit, which includes a three-way valve, an oil inlet pump, a coarse filter, a heater, a vacuum separation tank, an oil outlet pump, and a fine filter assembly connected in sequence. The three-way valve includes a first inlet, a second inlet, and an outlet. The first inlet is connected to the fine filter assembly, and the outlet is connected to the oil inlet pump. The fine filter assembly includes a first branch and a second branch arranged in parallel. The first branch is provided with a first valve, a first fine filter, and a second valve in sequence, and the second branch is provided with a third valve, a second fine filter, and a fourth valve in sequence. An oil drain valve connected to an external oil tank is provided on the circulating oil circuit between the fine filter assembly and the three-way valve. An oil storage tank is provided with an oil injection valve, which is connected to the second inlet.

2. The insulating oil treatment device for scientific research laboratories as described in claim 1, characterized in that, The oil injection valve is located at the bottom of the oil storage tank, and a vacuum valve is located at the top of the oil storage tank. The oil storage tank is also equipped with multiple needle-type oil sample valves spaced apart along its height.

3. The insulating oil treatment device for scientific research laboratories as described in claim 2, characterized in that, The top and bottom of the oil storage tank are respectively equipped with a top plate and a bottom plate. The top plate can support another oil storage tank and can be bolted to the bottom plate of the other oil storage tank.

4. The insulating oil treatment device for scientific research laboratories as described in claim 1, characterized in that, The oil filter also includes a condenser, and the vacuum separation tank has an oil drain port and an exhaust port. The oil drain port is connected to the oil pump, and the exhaust port is connected to the condenser.

5. The insulating oil treatment device for scientific research laboratories as described in claim 4, characterized in that, The oil filter also includes a degassing cylinder, the condenser is connected to the degassing cylinder, the bottom of the degassing cylinder has a drain port, and a rubber plug is provided at the drain port.

6. The insulating oil treatment apparatus for a scientific research laboratory as described in any one of claims 1 to 5, characterized in that, A sampling valve is installed on the circulating oil line between the fine filter assembly and the drain valve.

7. The insulating oil treatment apparatus for a scientific research laboratory as described in any one of claims 1 to 5, characterized in that, A first check valve is installed on the circulating oil line between the coarse filter and the heater, and a second check valve is installed on the circulating oil line between the oil outlet pump and the fine filter assembly.

8. The insulating oil treatment apparatus for a scientific research laboratory as described in any one of claims 1 to 5, characterized in that, The insulating oil treatment device also includes a frame and a base. The frame is connected to the base, the oil filter is installed on the base and located inside the frame, the bottom of the base is equipped with multiple rollers at intervals, and the top of the frame is connected to a lifting lug.

9. The insulating oil treatment apparatus for a scientific research laboratory as described in any one of claims 1 to 5, characterized in that, A temperature sensor is installed near the heater in the circulating oil circuit. A first pressure sensor and a second pressure sensor are installed on the first branch and the second branch, respectively. A vacuum sensor is installed inside the vacuum separation tank. A flow meter is installed in the circulating oil circuit between the fine filter assembly and the oil drain valve.

10. The insulating oil treatment apparatus for a scientific research laboratory as described in any one of claims 1 to 5, characterized in that, Both the inlet pump and the outlet pump are variable frequency adjustable pumps.

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