An oil purification device for oil-immersed transformer

Abstract

The present invention relates to the technical field of transformers, and discloses an oil-immersed transformer oil purification device, including an oil purification tank, an oil inlet is provided at the top center of the oil purification tank, and an oil inlet head is provided inside the oil inlet, an oil inlet pipe is fixedly provided on the top of the oil inlet head, and the side wall of the oil inlet head is rotatably arranged inside the oil inlet through a rotating shaft; a partition plate is vertically fixedly provided inside the oil purification tank and below the oil inlet head, and a filter screen is obliquely fixedly provided between the two sides of the partition plate and the inner walls of the two sides of the oil purification tank. The oil-immersed transformer oil purification device can automatically discharge the impurities cleaned from the filter screen to avoid the phenomenon that the impurities block the filter screen again, and at the same time, it has two oil purification structures, which can purify the oil while cleaning the filter screen, thereby improving the efficiency of oil purification. In addition, the blockage degree of the filter screen can be detected by the oil flow rate, and the filter screen can be detected, thereby improving the purification effect of the transformer oil.

Description

Technical Field

[0001] The invention relates to the technical field of transformers, in particular to an oil purification device for an oil-immersed transformer. Background Art

[0002] The oil-immersed transformer is a new type of high-performance transformer with a more reasonable structure and better performance. Its three-dimensional wound core has three core columns arranged in an equilateral triangle. There is no air gap in the magnetic circuit, the winding is tighter, the three magnetic circuits are of the same length and are the shortest, and the cross-sectional area of ​​the core column is closer to a circle. Therefore, the performance is further improved, the loss is reduced, the noise is reduced, the three items are balanced, and the third harmonic component is reduced. It is suitable for urban and rural, industrial and mining enterprise power grid transformation, and is more suitable for combined transformers and prefabricated substation transformers.

[0003] The iron core and windings in the oil-immersed power transformer are all immersed in transformer oil, and the transformer oil plays the role of insulation and cooling. The publication (announcement) number: CN116580935B discloses an oil-immersed transformer oil purification device, including a purification mechanism, including a purification shell, an oil inlet member arranged on the inner side of the purification shell, a filter screen arranged between the purification shell and the oil inlet member, and an oil outlet opened on the purification shell; a cleaning mechanism, including a cleaning component arranged on the purification shell, a trigger component arranged below the cleaning component, and an oil discharge component connected to the trigger component.

[0004] In the above scheme, the filter screen is cleaned by a cleaning mechanism. Although the filter screen can be cleaned, the impurities cleaned cannot be automatically removed, and the impurities will block the filter screen again. In addition, the oil purification operation needs to be stopped during the cleaning process of the filter screen, resulting in reduced oil purification efficiency. In addition, the blockage degree of the filter screen cannot be automatically detected. Therefore, an oil-immersed transformer oil purification device is proposed. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an oil-immersed transformer oil purification device, which can automatically discharge impurities cleaned from the filter to avoid the impurities clogging the filter again. At the same time, it has two oil purification structures, which can purify the oil while cleaning the filter, thereby improving the efficiency of oil purification. In addition, the clogging degree of the filter can be detected by the oil circulation rate, and the filter can be detected, thereby improving the purification effect of the transformer oil and solving the problems raised by the background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: an oil purification device for an oil-immersed transformer, comprising an oil purification tank, an oil inlet is provided at the top center of the oil purification tank, and an oil inlet head is provided inside the oil inlet, an oil inlet pipe is fixedly provided on the top of the oil inlet head, a side wall of the oil inlet head is rotatably arranged inside the oil inlet through a rotating shaft, and an angle adjustment mechanism connected to the rotating shaft is provided on the top of the oil purification tank; a partition plate is vertically fixedly provided inside the oil purification tank and below the oil inlet head, filters are obliquely fixedly provided between the two sides of the partition plate and the two side inner walls of the oil purification tank, impurity collection boxes are fixedly provided on the two sides of the oil purification tank and at positions corresponding to the positions of the filters, an impurity collection port is provided at the connection between the oil purification tank and the impurity collection box, and one end of the filter screen inclined downwards extends to the impurity collection port. An impurity discharge pipe is fixedly arranged at the bottom of the impurity collection box, and a solenoid valve is arranged on the wall of the impurity discharge pipe; an oil receiving bucket is fixedly arranged inside the clean oil tank and below the two filter screens, an oil guide pipe is fixedly arranged at the bottom of the two oil receiving buckets, and a flow meter is arranged on the wall of the oil guide pipe, and a dredging mechanism is arranged between the filter screen and the oil receiving bucket; a condensing box is fixedly arranged at the bottom of the clean oil tank, a condensing pipe is fixedly installed inside the condensing box, an oil return pump is fixedly installed inside the condensing box, and an oil return pipe extending to the outside of the condensing box is fixedly arranged at the output end of the oil return pump, a PLC controller is fixedly arranged on the side wall of the clean oil tank, and the angle adjustment mechanism, solenoid valve, flow meter, dredging mechanism and condensing pipe are all electrically connected to the PLC controller.

[0007] Preferably, the angle adjustment mechanism includes a first electric push rod, a rack and a gear, a mounting seat is fixedly provided on the top of the clean oil tank, the first electric push rod is fixedly provided on the side wall of the mounting seat, the gear is fixedly provided on the shaft wall of the rotating shaft, the rack is laterally meshed and arranged on the top of the gear, and one end of the rack is fixedly connected to the moving end of the first electric push rod, and the first electric push rod is electrically connected to the PLC controller.

[0008] Preferably, the rotatable angle range of the oil inlet head is 45° to -45°.

[0009] Preferably, fixing rods are fixedly provided on both sides of the oil receiving bucket, and one end of the two fixing rods away from the oil receiving bucket is fixedly connected to the side wall of the partition plate and the inner wall of the clean oil tank.

[0010] Preferably, the unclogging mechanism includes a second electric push rod, a push plate and a unclogging brush, a mounting rod is fixed between the inner wall of the clean oil tank and the side wall of the partition plate, the second electric push rod is fixed on the rod wall of the mounting rod, the push plate is fixed on the moving end of the second electric push rod, the unclogging brush is fixed on the upper surface of the push plate, and the second electric push rod is electrically connected to the PLC controller.

[0011] Preferably, the unclogging brush is made of nylon bristles, and the bristles of the unclogging brush can extend into the mesh holes of the filter.

[0012] Preferably, the lower end of the oil guide pipe is fixedly connected to the condenser box, both ends of the condenser pipe extend to the outside of the condenser box, and both ends of the condenser pipe are fixedly provided with pipe joints.

[0013] Preferably, one end of the condenser is connected to the water inlet pipe through a pipe joint, and the other end of the condenser is connected to the recovery pipe through a pipe joint.

[0014] Preferably, a disturbance motor is fixedly provided on the side wall of the condensation box, and an output end of the disturbance motor extends to the interior of the condensation box where a disturbance blade is fixedly provided.

[0015] Compared with the prior art, the present invention provides an oil-immersed transformer oil purification device, which has the following beneficial effects:

[0016] 1. The oil-immersed transformer oil purification device is provided with a filter screen, an impurity collection box, an impurity discharge pipe and a solenoid valve. After the filter screen filters the transformer oil, the filtered impurities will fall along the inclined surface of the filter screen to the inside of the impurity collection box. When the inside of the impurity collection box is full, it is only necessary to open the solenoid valve to discharge the impurities through the impurity discharge pipe.

[0017] 2. The oil-immersed transformer oil purification device is provided with two filter screens, an oil inlet pipe and a rotating shaft. The rotating shaft is rotated by an angle adjustment mechanism, and the rotating shaft drives the oil inlet pipe to rotate and align with the filter screens on both sides respectively, so that the two filter screens can be used alternately, and the oil can be purified while the filter screen is cleaned, thereby improving the efficiency of oil purification.

[0018] 3. The oil-immersed transformer oil purification device is provided with an oil receiving hopper, an oil guide pipe and a flow meter. The filtered oil will fall into the inside of the oil receiving hopper. When the transformer oil passes through the inside of the oil guide pipe, the flow meter can measure the flow of the transformer oil. If the flow of the transformer oil is smaller, it means that the degree of blockage of the filter is greater, so the filter can be detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of an oil purification device for an oil-immersed transformer proposed by the present invention;

[0020] Figure 2 for Figure 1 A magnified view of the structure of the local A part;

[0021] Figure 3 for Figure 1 Schematic diagram of the structure of the middle oil hopper and the oil guide pipe;

[0022] Figure 4for Figure 1 Schematic diagram of the structure of the middle push plate and the dredging brush;

[0023] Figure 5 for Figure 1 Schematic diagram of the internal structure of the condensation box.

[0024] In the figure: 1. clean oil tank; 2. oil inlet head; 3. oil inlet pipe; 4. rotating shaft; 5. partition plate; 6. filter screen; 7. impurity collection box; 8. impurity discharge pipe; 9. solenoid valve; 10. oil receiving bucket; 11. oil guide pipe; 12. flow meter; 13. condenser box; 14. condenser pipe; 15. oil return pump; 16. oil return pipe; 17. PLC controller; 18. first electric push rod; 19. rack; 20. gear; 21. mounting seat; 22. second electric push rod; 23. push plate; 24. dredging brush; 25. mounting rod; 26. fixing rod; 27. pipe joint; 28. disturbance motor; 29. ​​spoiler blade. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0026] See also Figure 1-2 An oil purification device for an oil-immersed transformer comprises an oil purification tank 1, an oil inlet is arranged at the top center of the oil purification tank 1, an oil inlet head 2 is arranged inside the oil inlet, an oil inlet pipe 3 is fixedly arranged on the top of the oil inlet head 2, a side wall of the oil inlet head 2 is rotatably arranged inside the oil inlet through a rotating shaft 4, and an angle adjustment mechanism connected to the rotating shaft 4 is arranged on the top of the oil purification tank 1; a partition plate 5 is vertically fixedly arranged inside the oil purification tank 1 and below the oil inlet head 2, a filter screen 6 is obliquely fixedly arranged between the two sides of the partition plate 5 and the inner walls of the two sides of the oil purification tank 1, and a filter screen 6 is obliquely fixedly arranged between the two sides of the oil purification tank 1 and the ... An impurity collecting box 7 is fixedly provided at the position corresponding to the position of the net 6, an impurity collecting port is provided at the connection between the clean oil tank 1 and the impurity collecting box 7, the downwardly inclined end of the filter net 6 extends to the inside of the impurity collecting port, an impurity discharge pipe 8 is fixedly provided at the bottom of the impurity collecting box 7, and a solenoid valve 9 is provided on the pipe wall of the impurity discharge pipe 8. After the filter net 6 filters the transformer oil, the filtered impurities will fall along the inclined surface of the filter net 6 to the inside of the impurity collecting box 7. When the inside of the impurity collecting box 7 is full, it is only necessary to open the solenoid valve 9 to allow the impurities to be discharged through the impurity discharge pipe 8. Example

[0027] See also Figure 1 and3 An oil receiving bucket 10 is fixedly provided inside the clean oil tank 1 and below the two filter screens 6. Fixed rods 26 are fixedly provided on both sides of the oil receiving bucket 10. One end of the two fixed rods 26 away from the oil receiving bucket 10 is fixedly connected to the side wall of the partition plate 5 and the inner wall of the clean oil tank 1. An oil guide pipe 11 is fixedly provided at the bottom of the two oil receiving buckets 10, and a flow meter 12 is provided on the wall of the oil guide pipe 11. A dredging mechanism is provided between the filter screen 6 and the oil receiving bucket 10. The filtered oil will fall into the inside of the oil receiving bucket 10. When the transformer oil passes through the inside of the oil guide pipe 11, the flow rate of the transformer oil can be measured by the flow meter 12. If the flow rate of the transformer oil is smaller, it means that the degree of blockage of the filter screen 6 is greater, so that the filter screen 6 can be detected. Example

[0028] See also Figure 1 and 5 A condenser tank 13 is fixedly provided at the bottom of the clean oil tank 1, a condenser pipe 14 is fixedly installed inside the condenser tank 13, a return oil pump 15 is fixedly installed inside the condenser tank 13, and an output end of the return oil pump 15 is fixedly provided with an return oil pipe 16 extending to the outside of the condenser tank 13, a PLC controller 17 is fixedly provided on the side wall of the clean oil tank 1, an angle adjustment mechanism, a solenoid valve 9, a flow meter 12, a dredging mechanism and a condenser pipe 14 are all electrically connected to the PLC controller 17, the purified transformer oil will be cooled through the condenser pipe 14, and after the cooling is completed, it will be discharged through the return oil pump 15 and the return oil pipe 16 for recycling; the lower end of the oil guide pipe 11 is fixed to the condenser tank 13 A fixed connection is provided, both ends of the condenser tube 14 extend to the outside of the condenser box 13, and both ends of the condenser tube 14 are fixedly provided with pipe joints 27, one end of the condenser tube 14 is connected to the water inlet pipe through the pipe joint 27, and the other end of the condenser tube 14 is connected to the recovery pipe through the pipe joint 27. When the cooling water passes through the inside of the condenser tube 14, the transformer oil can be cooled; a disturbance motor 28 is fixedly provided on the side wall of the condenser box 13, and the output end of the disturbance motor 28 extends to the inside of the condenser box 13 and is fixedly provided with a disturbance blade 29. The disturbance motor 28 can drive the disturbance blade 29 to rotate when it is working, so that the transformer oil inside the condenser box 13 can be quickly cooled. Example

[0029] See also Figure 1-2The angle adjustment mechanism includes a first electric push rod 18, a rack 19 and a gear 20. A mounting seat 21 is fixedly provided on the top of the clean oil tank 1. The first electric push rod 18 is fixedly arranged on the side wall of the mounting seat 21. The gear 20 is fixedly arranged on the shaft wall of the rotating shaft 4. The rack 19 is arranged on the top of the gear 20 in a transverse meshing manner, and one end of the rack 19 is fixedly connected to the moving end of the first electric push rod 18. The first electric push rod 18 is electrically connected to the PLC controller 17. The PLC controller 17 controls the telescopic action of the first electric push rod 18, so that the rack 19 moves to the left or right. The rack 19 can drive the gear 20 and the rotating shaft 4 to rotate forward and reverse, so that the oil inlet head 2 rotates to the two sides of the partition plate 5 respectively and corresponds to the filter screen 6 on both sides, and the rotatable angle range of the oil inlet head 2 is 45° to -45°. Example

[0030] See also Figure 1 and 4 The dredging mechanism includes a second electric push rod 22, a push plate 23 and a dredging brush 24. A mounting rod 25 is fixedly provided between the inner side wall of the clean oil tank 1 and the side wall of the partition plate 5. The second electric push rod 22 is fixedly provided on the rod wall of the mounting rod 25. The push plate 23 is fixedly provided on the movable end of the second electric push rod 22. The dredging brush 24 is fixedly provided on the upper surface of the push plate 23. The dredging brush 24 adopts nylon bristles, and the bristles of the dredging brush 24 can extend into the mesh of the filter 6. The second electric push rod 22 is electrically connected to the PLC controller 17. The PLC controller 17 controls the extension action of the second electric push rod 22. The second electric push rod 22 drives the push plate 23 and the dredging brush 24 to move upward until the dredging brush 24 contacts the mesh of the filter 6, thereby being able to dredge the filter 6.

[0031] It should be noted that the term "comprises" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oil purification device for an oil-immersed transformer, comprising an oil purification tank (1), characterized in that: An oil inlet is provided at the center of the top of the clean oil tank (1), and an oil inlet head (2) is provided inside the oil inlet. An oil inlet pipe (3) is fixedly provided on the top of the oil inlet head (2). The side wall of the oil inlet head (2) is rotatably arranged inside the oil inlet via a rotating shaft (4). An angle adjustment mechanism connected to the rotating shaft (4) is provided on the top of the clean oil tank (1); A partition plate (5) is vertically fixed inside the clean oil tank (1) and below the oil inlet head (2); filter screens (6) are obliquely fixed between the two sides of the partition plate (5) and the inner walls of the clean oil tank (1); impurity collection boxes (7) are fixedly provided on the two sides of the clean oil tank (1) and at positions corresponding to the positions of the filter screens (6); an impurity collection port is provided at the connection between the clean oil tank (1) and the impurity collection box (7); a downwardly inclined end of the filter screen (6) extends to the inside of the impurity collection port; an impurity discharge pipe (8) is fixedly provided at the bottom of the impurity collection box (7); and a solenoid valve (9) is provided on the pipe wall of the impurity discharge pipe (8); An oil receiving hopper (10) is fixedly provided inside the clean oil tank (1) and below the two filter screens (6); an oil guide pipe (11) is fixedly provided at the bottom of the two oil receiving hoppers (10); a flow meter (12) is provided on the wall of the oil guide pipe (11); and a dredging mechanism is provided between the filter screen (6) and the oil receiving hopper (10); A condenser tank (13) is fixedly provided at the bottom of the clean oil tank (1), the lower end of the oil guide pipe (11) is fixedly connected to the condenser tank (13), a condenser pipe (14) is fixedly installed inside the condenser tank (13), an oil return pump (15) is fixedly installed inside the condenser tank (13), and an oil return pipe (16) extending to the outside of the condenser tank (13) is fixedly provided at the output end of the oil return pump (15), a PLC controller (17) is fixedly provided on the side wall of the clean oil tank (1), and the angle adjustment mechanism, the solenoid valve (9), the flow meter (12), the dredging mechanism and the condenser pipe (14) are all electrically connected to the PLC controller (17).

2. The oil purification device for oil-immersed transformer according to claim 1, characterized in that: The angle adjustment mechanism comprises a first electric push rod (18), a rack (19) and a gear (20); a mounting seat (21) is fixedly provided on the top of the clean oil tank (1); the first electric push rod (18) is fixedly arranged on the side wall of the mounting seat (21); the gear (20) is fixedly arranged on the shaft wall of the rotating shaft (4); the rack (19) is arranged on the top of the gear (20) in a transverse meshing manner; one end of the rack (19) is fixedly connected to the moving end of the first electric push rod (18); and the first electric push rod (18) is electrically connected to a PLC controller (17).

3. The oil purification device for an oil-immersed transformer according to claim 2, characterized in that: The oil inlet head (2) can rotate at an angle ranging from 45° to -45°.

4. The oil purification device for oil-immersed transformer according to claim 1, characterized in that: Fixed rods (26) are fixedly provided on both sides of the oil receiving bucket (10), and ends of the two fixed rods (26) away from the oil receiving bucket (10) are fixedly connected to the side wall of the partition plate (5) and the inner wall of the clean oil tank (1).

5. The oil purification device for oil-immersed transformer according to claim 1, characterized in that: The dredging mechanism comprises a second electric push rod (22), a push plate (23) and a dredging brush (24); a mounting rod (25) is fixedly provided between the inner wall of the clean oil tank (1) and the side wall of the partition plate (5); the second electric push rod (22) is fixedly provided on the rod wall of the mounting rod (25); the push plate (23) is fixedly provided on the movable end of the second electric push rod (22); the dredging brush (24) is fixedly provided on the upper surface of the push plate (23); and the second electric push rod (22) is electrically connected to a PLC controller (17).

6. The oil purification device for oil-immersed transformer according to claim 5, characterized in that: The unclogging brush (24) is made of nylon bristles, and the bristles of the unclogging brush (24) can extend into the meshes of the filter screen (6).

7. The oil purification device for oil-immersed transformer according to claim 1, characterized in that: Both ends of the condenser tube (14) extend to the outside of the condenser box (13), and both ends of the condenser tube (14) are fixedly provided with pipe joints (27).

8. The oil purification device for oil-immersed transformer according to claim 7, characterized in that: One end of the condenser pipe (14) is connected to the water inlet pipe via a pipe joint (27), and the other end of the condenser pipe (14) is connected to the recovery pipe via a pipe joint (27).

9. The oil purification device for oil-immersed transformer according to claim 1, characterized in that: A disturbance motor (28) is fixedly provided on the side wall of the condensation box (13), and an output end of the disturbance motor (28) extends to the interior of the condensation box (13) where a disturbance blade (29) is fixedly provided.

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