An oil filter mechanism of an oil-immersed transformer

Abstract

The application discloses an oil filter mechanism of an oil-immersed transformer, which comprises a mounting plate and a transformer body mounted on the top of the mounting plate, a liquid pumping pump is fixedly mounted on the top of the mounting plate, an oil pumping pipe is mounted on the liquid pumping pump, the other end of the oil pumping pipe is connected to the bottom of the transformer body, a collecting box is fixedly connected to the top of the mounting plate, a separation box is rotatably connected to the inner wall of the collecting box, a filter cylinder is integrally formed on the inner wall of the separation box, and an oil-water separation membrane is connected to the filter cylinder. The application realizes the filtration of water in oil by the vertically rotating filter cylinder and the oil-water separation membrane, the vertical arrangement makes the contact area of oil and the oil-water separation membrane larger through centrifugal force, so that the separation efficiency is better, the filter assembly is arranged to filter the impurities deposited in the oil, so that the oil flowing back into the transformer body can flow better, and the filter assembly is convenient to clean.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and more particularly to an oil filter mechanism for an oil-immersed transformer. Background Art

[0002] Currently, most oil-immersed power transformers do not dehydrate or dry the insulating oil during operation, resulting in a gradual increase in moisture content. Trace moisture in insulating oil is a key factor affecting insulation properties, significantly impacting both the electrical and physical and chemical properties of the insulating medium. For example, moisture can reduce the sparkover voltage of the insulating oil, increase the dielectric loss factor (tg8), accelerate oil aging, and degrade insulation performance. Moisture in power transformer equipment not only reduces operational reliability and lifespan, but can also lead to equipment damage. Furthermore, when moisture in the insulating oil coexists with water and oxygen, metals absorb it and react with acids in the oil to form salts or soaps, which accelerate oxidation reactions in the insulating oil. This moisture directly contributes to the degradation of polymer materials like oil-paper fibers, causing them to age and degrade, accelerating the performance degradation of the insulation system. This can lead to serious transformer failures and disrupt normal operation.

[0003] The patent with application number CN201922192329.3 discloses an online oil filtering system for an oil-immersed transformer, comprising an oil-immersed transformer casing, a filter tank half shell, a disc and an oil-water separation membrane; the bottom of the oil-immersed transformer casing is connected to the left side of the upper surface of the mounting plate, and one side of the bottom of the oil-immersed transformer casing is connected to the oil extraction main pipe through no less than three oil extraction branch pipes, the side of the oil extraction main pipe is connected to one end of the oil inlet pipe, and the top of the oil-immersed transformer casing is connected to the oil delivery main pipe through no less than three oil delivery branch pipes, and the side of the oil delivery main pipe is connected to one end of the oil outlet pipe; the filter tank half shells are provided with two and correspondingly arranged, and the sides of the two filter tank half shells are provided with corresponding fixing plates; the online oil filtering system for the oil-immersed transformer can filter moisture in the insulating oil, ensure the operating reliability and service life of the oil-immersed transformer, can filter oil in real time, and has good filtering effect.

[0004] This structure separates the oil from the transformer by leading it into the filter tank and passing it through the oil-water separation membrane. However, the stably arranged filter tank in this structure makes the contact area between the oil and the separation membrane small after entering, which may cause the oil to be discharged after entering the filter tank and unable to be separated. In addition, the impurities generated by the oil deposition cannot be filtered by this structure, and the flow of the oil will be affected by the impurities, thereby affecting the operation of the transformer. Summary of the Invention

[0005] In view of the problems existing in the prior art, the object of the present invention is to provide an oil filter mechanism for an oil-immersed transformer to solve the background technical problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solutions:

[0007] The top of the mounting plate is fixedly mounted with a liquid suction pump, an oil suction pipe is mounted on the liquid suction pump, and the other end of the oil suction pipe is connected to the bottom of the transformer body; the top of the mounting plate is fixedly connected with a collecting box, a separation box is rotatably connected to the inner wall of the collecting box, a filter cartridge is integrally formed on the inner wall of the separation box, an oil-water separation membrane is connected to the filter cartridge, the liquid suction pump is connected to the interior of the filter cartridge through a pipeline, a sealing ring is rotatably connected to the inner wall of the collecting box, the separation box is connected to the sealing ring, and uniformly distributed collection pipes are fixedly connected to the inner wall of the separation box, the other end of the collection pipe passes through the sealing ring and extends to the interior of the collecting box, a driving motor is fixedly mounted on the top of the collecting box, the outer ring of the separation box is connected to an outer gear ring, and the driving motor is meshed with the outer gear ring through a gear; the transformer body is connected with an oil return pipe, the other end of the oil return pipe passes through the separation box and extends to the interior of the filter cartridge, and a filter assembly is provided on the oil suction pipe.

[0008] As a further description of the above technical solution: the filter assembly includes a mounting seat, the mounting seat is fixedly connected to the top of the mounting plate, a rotating motor is fixedly installed on the front of the mounting seat, the output shaft of the rotating motor passes through and extends to the interior of the mounting seat, a synchronous shaft is fixedly connected to the output shaft of the rotating motor, and two sealing plates and two filter plates are connected to the synchronous shaft.

[0009] As a further description of the above technical solution: a sealing cover plate is provided on the top of the mounting seat, and the sealing cover plate is connected to the top of the mounting seat by bolts.

[0010] As a further description of the above technical solution: a damping pad is connected to the sealing plate, and the damping pad is in contact with the inner wall of the mounting seat.

[0011] As a further description of the above technical solution: the connection positions of the oil return pipe, the oil extraction pipe and the separation box are all subjected to rotary sealing treatment.

[0012] As a further description of the above technical solution: a protective cover is detachably connected to the top of the collection box, and the driving motor and the outer gear ring are both located inside the protective cover.

[0013] As a further description of the above technical solution: the oil extraction pipe is communicated with the interior of the mounting seat, and the sealing plate is located on the top of the oil extraction pipe.

[0014] As a further description of the above technical solution: a booster pump is installed on the oil return pipe.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] In the present invention, a vertically rotating filter cartridge is provided in conjunction with an oil-water separation membrane to filter water in the oil, and the vertical setting enables the contact area between the oil and the oil-water separation membrane to be larger through centrifugal force, thereby improving the separation efficiency. At the same time, a filter assembly is provided to filter impurities deposited in the oil, so that the oil flowing back into the transformer body can flow better, and the filter assembly itself is easy to clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0018] Figure 2 Schematic diagram of the cross-sectional structure of the separation box of the present invention;

[0019] Figure 3 It is a schematic diagram of the cross-sectional structure of the filter assembly of the present invention.

[0020] Description of the numbers in the figure:

[0021] 1. Mounting plate; 2. Transformer body; 3. Liquid pump; 4. Oil extraction pipe; 5. Collection box; 6. Separation box; 7. Filter cartridge; 8. Oil-water separation membrane; 9. Sealing ring; 10. Collection pipe; 11. Drive motor; 12. External gear ring; 13. Oil return pipe; 14. Filter assembly; 1401. Mounting seat; 1402. Rotating motor; 1403. Synchronous shaft; 1404. Sealing plate; 1405. Filter plate; 15. Sealing cover; 16. Damping pad; 17. Protective cover. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0023] See also Figures 1 to 3In the present invention, an oil filter mechanism for an oil-immersed transformer includes a mounting plate 1 and a transformer body 2 mounted on the top thereof. A liquid extraction pump 3 is fixedly mounted on the top of the mounting plate 1. An oil extraction pipe 4 is mounted on the liquid extraction pump 3. The other end of the oil extraction pipe 4 is connected to the bottom of the transformer body 2. A collecting box 5 is fixedly connected to the top of the mounting plate 1. A separation box 6 is rotatably connected to the inner wall of the collecting box 5. A filter cartridge 7 is integrally formed on the inner wall of the separation box 6. An oil-water separation membrane 8 is connected to the filter cartridge 7. The liquid extraction pump 3 is connected to the interior of the filter cartridge 7 through a pipeline. The inner wall of the collecting box 5 is connected to the oil-water separation membrane 8. A sealing ring 9 is rotatably connected to the upper portion, and the separation box 6 is connected to the sealing ring 9. Evenly distributed collecting pipes 10 are fixedly connected to the inner wall of the separation box 6. The other end of the collecting pipe 10 passes through the sealing ring 9 and extends to the interior of the collecting box 5. A driving motor 11 is fixedly installed on the top of the collecting box 5. The outer ring of the separation box 6 is connected to an outer gear ring 12. The driving motor 11 engages with the outer gear ring 12 through a gear. A return oil pipe 13 is connected to the transformer body 2. The other end of the return oil pipe 13 passes through the separation box 6 and extends to the interior of the filter cartridge 7. A filter assembly 14 is provided on the oil extraction pipe 4.

[0024] The filter assembly 14 includes a mounting seat 1401, which is fixedly connected to the top of the mounting plate 1. A rotating motor 1402 is fixedly installed on the front of the mounting seat 1401. The output shaft of the rotating motor 1402 passes through and extends to the interior of the mounting seat 1401. A synchronous shaft 1403 is fixedly connected to the output shaft of the rotating motor 1402. Two sealing plates 1404 and two filter plates 1405 are connected to the synchronous shaft 1403.

[0025] The connection between the oil return pipe 13, the oil extraction pipe 4 and the separation box 6 is all subjected to rotary sealing treatment;

[0026] The oil extraction pipe 4 is communicated with the interior of the mounting seat 1401 , and the sealing plate 1404 is located on the top of the oil extraction pipe 4 ; a booster pump is installed on the oil return pipe 13 .

[0027] The oil inside the oil-immersed transformer is led out by the oil extraction pipe 4, passes through the filter assembly 14 and the separation box 6, and then re-enters the transformer body 2 through the return oil pipe 13. The density of water is greater than that of oil, so the oil containing water is at the bottom of the transformer body 2. The liquid extraction pump 3 drives the oil to move to the right and enters the inside of the mounting seat 1401. At this time, the oil blocked by the sealing plate 1404 passes through the bottom filter plate 1405 and then discharges the mounting seat 1401, and continues to pass through the liquid extraction pump 3 to be sent to the inside of the separation box 6. At this time, the impurities deposited in the oil will be blocked by the filter plate 1405, and the drive motor 11 drives the gear fixedly connected to it to rotate, thereby Push the outer gear ring 12 to rotate, and the separation box 6 will rotate accordingly. At this time, the inside of the filter cartridge 7 is filled with oil. As it rotates, centrifugal force begins to be generated, causing the oil to stick to the oil-water separation membrane 8, so that the water is thrown out of the filter cartridge 7. At this time, the oil at the top is under pressure and enters the inside of the return oil pipe 13. With the help of the booster pump, the oil enters the inside of the transformer body 2. The water inside the separation box 6 enters the collection box 5 through multiple groups of collection pipes 10 for collection. During use, the user can control the rotating motor 1402 to energize and drive the two groups of sealing plates 1404 to exchange positions, so that the filtered impurities are flipped to the top, and the user can clean them.

[0028] In the present invention, a vertically rotating filter cartridge 7 is provided in conjunction with an oil-water separation membrane 8 to filter the water in the oil, and the vertical setting causes the contact area between the oil and the oil-water separation membrane 8 to be larger through centrifugal force, thereby improving the separation efficiency. At the same time, a filter assembly 14 is provided to filter the impurities deposited in the oil, so that the oil flowing back into the transformer body 2 can flow better, and the filter assembly 14 itself is easy to clean.

[0029] See also Figure 1 and 3 , wherein: a sealing cover plate 15 is provided on the top of the mounting seat 1401, and the sealing cover plate 15 is connected to the top of the mounting seat 1401 by bolts.

[0030] In the present invention, after the sealing cover plate 15 connected by bolts is removed, the interior of the mounting seat 1401 is exposed, thereby making it easier for users to clean the filtered impurities.

[0031] See also Figure 3 , wherein: the sealing plate 1404 is connected to a damping pad 16 , and the damping pad 16 is in contact with the inner wall of the mounting seat 1401 .

[0032] In the present invention, the provision of the damping pad 16 can improve the sealing between the sealing plate 1404 and the inner wall of the mounting seat 1401, thereby blocking the oil entering the mounting seat 1401 and preventing the oil from overflowing.

[0033] See also Figure 1 and2 , wherein: a protective cover 17 is detachably connected to the top of the collecting box 5 , and the driving motor 11 and the outer gear ring 12 are both located inside the protective cover 17 .

[0034] In the present invention, the provision of the protective cover 17 can protect the drive motor 11 and the outer gear ring 12, preventing the gears on the output shaft of the drive motor 11 and the outer gear ring 12 from being affected by external factors and thus affecting the rotation of the separation box 6.

[0035] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. An oil filter mechanism for an oil-immersed transformer, comprising a mounting plate (1) and a transformer body (2) mounted on top thereof, characterized in that: A liquid extraction pump (3) is fixedly mounted on the top of the mounting plate (1), an oil extraction pipe (4) is mounted on the liquid extraction pump (3), the other end of the oil extraction pipe (4) is connected to the bottom of the transformer body (2), a collecting box (5) is fixedly connected to the top of the mounting plate (1), a separation box (6) is rotatably connected to the inner wall of the collecting box (5), a filter cartridge (7) is integrally formed on the inner wall of the separation box (6), an oil-water separation membrane (8) is connected to the filter cartridge (7), the liquid extraction pump (3) is connected to the interior of the filter cartridge (7) through a pipeline, a sealing ring (9) is rotatably connected to the inner wall of the collecting box (5), and the separation box (6) is connected to the inner wall of the separation box (6). On the sealing ring (9), evenly distributed collecting pipes (10) are fixedly connected to the inner wall of the separation box (6), the other end of the collecting pipe (10) penetrates the sealing ring (9) and extends to the interior of the collection box (5), a driving motor (11) is fixedly installed on the top of the collection box (5), the outer ring of the separation box (6) is connected to the outer gear ring (12), the driving motor (11) is meshed with the outer gear ring (12) through a gear, an oil return pipe (13) is connected to the transformer body (2), the other end of the oil return pipe (13) penetrates the separation box (6) and extends to the interior of the filter cartridge (7), and a filter assembly (14) is provided on the oil extraction pipe (4); Furthermore, the filter cartridge (7) rotates vertically, and the oil-water separation membrane (8) is vertically arranged on the side of the filter cartridge (7), thereby achieving a larger contact area between the oil and the oil-water separation membrane.

2. The oil filter mechanism for an oil-immersed transformer according to claim 1, characterized in that: The filter assembly (14) includes a mounting seat (1401), the mounting seat (1401) is fixedly connected to the top of the mounting plate (1), a rotating motor (1402) is fixedly mounted on the front of the mounting seat (1401), the output shaft of the rotating motor (1402) passes through and extends into the interior of the mounting seat (1401), a synchronous shaft (1403) is fixedly connected to the output shaft of the rotating motor (1402), and two sealing plates (1404) and two filter plates (1405) are connected to the synchronous shaft (1403).

3. The oil filter mechanism for an oil-immersed transformer according to claim 2, characterized in that: A sealing cover plate (15) is provided on the top of the mounting seat (1401), and the sealing cover plate (15) is connected to the top of the mounting seat (1401) by means of bolts.

4. The oil filter mechanism for an oil-immersed transformer according to claim 2, characterized in that: A damping pad (16) is connected to the sealing plate (1404), and the damping pad (16) is in contact with the inner wall of the mounting seat (1401).

5. The oil filter mechanism for an oil-immersed transformer according to claim 1, characterized in that: The connection positions between the oil return pipe (13), the oil extraction pipe (4) and the separation box (6) are all subjected to a rotary sealing treatment.

6. The oil filter mechanism for an oil-immersed transformer according to claim 1, characterized in that: The top of the collection box (5) is detachably connected to a protective cover (17), and the drive motor (11) and the outer gear ring (12) are both located inside the protective cover (17).

7. The oil filter mechanism for an oil-immersed transformer according to claim 2, characterized in that: The oil extraction pipe (4) is in communication with the interior of the mounting seat (1401), and the sealing plate (1404) is located on the top of the oil extraction pipe (4).

8. The oil filter mechanism for an oil-immersed transformer according to claim 1, characterized in that: A booster pump is installed on the oil return pipe (13).

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