Energy-saving oil-immersed transformer

Abstract

The application relates to an energy-saving oil-immersed transformer, and relates to the technical field of transformers.The energy-saving oil-immersed transformer comprises a transformer body, the inside of which is filled with insulating oil, the upper end surface of the transformer body is provided with a protection device, a detection device, a heat dissipation structure, a liquid pumping pump and a heat dissipation pipe, and a filtering device is further arranged and connected with the heat dissipation pipe, the filtering device comprises a conical pipe, an access pipe, an arc-shaped screen and an outflow pipe, the two ends of the conical pipe are provided with a first arc-shaped protrusion and a second arc-shaped protrusion, and the mesh number of the arc-shaped screen gradually increases from the first arc-shaped protrusion to the second arc-shaped protrusion; an energy storage device is connected with the liquid pumping pump and comprises an impeller, a magnetic shaft column, a charge-discharge machine and an energy storage flywheel, the impeller drives the magnetic shaft column to rotate through liquid flow, and the charge-discharge machine is used for storing energy and supplying power for the liquid pumping pump. The application can effectively reduce external energy consumption, meanwhile, the energy storage device converts the kinetic energy of the liquid flow formed by the liquid pumping pump into electric energy and supplies power for the equipment, and the energy consumption of the transformer operation is reduced.

Description

Technical Field

[0001] This application relates to the field of transformer technology, and in particular to an energy-saving oil-immersed transformer. Background Technology

[0002] Transformers are electrical energy conversion devices in power plants, power transmission and distribution networks, substations, and enterprise internal power transmission and distribution systems, and are an important type of electrical equipment. Currently, oil-immersed transformers have oil circulation and forced oil circulation cooling methods, and cooling generally requires the assistance of various devices, such as detection devices or cooling devices, resulting in high energy consumption and high operating costs for oil-immersed transformers. Summary of the Invention

[0003] To reduce energy consumption, this application provides an energy-saving oil-immersed transformer.

[0004] The energy-saving oil-immersed transformer provided in this application adopts the following technical solution: An energy-saving oil-immersed transformer includes a transformer body filled with insulating oil, and the transformer body is equipped with: Protective devices are used to protect the switches on the surface of the transformer body; The heat dissipation structure has several heat dissipation fins fixedly connected to the side wall of the outer surface of the transformer body. The heat dissipation fins and the inside of the transformer body form a heat transfer channel for the self-circulation heat dissipation of the insulating oil. A liquid level detection device includes a liquid level detection column, a sliding groove inside the liquid level detection column, a marker block slidably connected inside the sliding groove, a floating block made of hollow plastic ball fixedly connected to the bottom of the marker block, a viewing window on one side of the liquid level detection column, a first marker and a second marker on the marker block, the first marker indicating normal liquid level, the second marker indicating low liquid level, and an alarm on the top of the liquid level detection column, the alarm being linked to the marker block. A temperature detection device is provided, with a temperature detection port on the upper surface of the transformer body, and a temperature detector is fixedly connected to the temperature detection port, extending into the interior of the transformer body. A liquid pump, connected to the transformer body; The heat dissipation pipe is connected to the liquid pump and is used for circulating heat dissipation of the insulating oil. The filter device, connected to the heat dissipation pipe, includes a tapered tube, an inlet pipe, an arc-shaped screen, and an outlet pipe. The tapered tube has a first arc-shaped protrusion and a second arc-shaped protrusion at both ends. The mesh size of the arc-shaped screen gradually increases from the first arc-shaped protrusion to the second arc-shaped protrusion. An energy storage device, connected to a liquid pump, includes an impeller, a magnetic shaft, a charge / discharger, and an energy storage flywheel. The impeller drives the magnetic shaft to rotate through the liquid flow, and the charge / discharger is used to store energy and supply power to the liquid pump.

[0005] By adopting the above technical solution, the heat sink is combined with the ring insulating oil, and natural heat dissipation is achieved through the heat transfer channel, reducing external energy consumption. The liquid pump drives the oil circulation, and in conjunction with the energy storage flywheel, kinetic energy is recovered and used to supply power, further reducing the transformer's operating energy consumption.

[0006] The oil level detection column, linked by a floating block and a marker block, displays the oil level status in real time. An alarm automatically triggers a low oil level warning, reducing the frequency of manual inspections. A temperature detector directly monitors the oil temperature to prevent overheating and subsequent degradation of insulation performance. A filtration system removes impurities from the oil, preventing wear or short circuits in internal components and extending the transformer's lifespan.

[0007] Optionally, the protective device includes a tap changer, which is threadedly connected to a protective cover. The protective cover abuts against the surface of the transformer body, and a sealing ring is fixedly connected inside the protective cover.

[0008] By adopting the above technical solution, the sealing ring fills the gap between the protective cover and the tap changer, preventing moisture and dust from entering and avoiding oxidation or short circuits in the tap changer. The protective cover prevents accidental activation of the tap changer, reducing the risk of electric shock for maintenance personnel.

[0009] Optionally, the filtration device also includes a transparent filter tube and a multi-stage filter plate. The transparent filter tube is connected to the arc-shaped cap tube through a liquid distribution tube, and the multi-stage filter plate can be detachably installed inside the transparent filter tube.

[0010] By adopting the above technical solution, the arc-shaped screen initially filters large particles of impurities, while the multi-stage filter plates finely filter tiny particles, improving the purity of the oil. The transparent filter tube allows for real-time observation of the oil filtration effect, facilitating timely replacement of clogged filter plates and preventing oil circuit blockage.

[0011] Optionally, the energy storage device also includes a connecting block made of elastic rubber and metal. The connecting block is fixed in the connecting groove of the magnetic shaft by magnetic adsorption. When the centrifugal force on the connecting block is greater than the magnetic attraction force, the connecting hole abuts against the elastic rubber.

[0012] By adopting the above technical solution, when the impeller speed is too high, centrifugal force overcomes magnetic attraction, and the connecting block and elastic rubber friction reduce speed, preventing bearing overload damage. The impeller drives the magnetic shaft to rotate the energy storage flywheel, converting mechanical energy into electrical energy for storage and use by the liquid pump, reducing the external power supply requirement.

[0013] Optionally, a first tee pipe and a return pipe are provided between the heat dissipation pipe and the transformer body. The first tee pipe is used to control the return path of the insulating oil, and the first tee pipe is equipped with a first gate valve.

[0014] By adopting the above technical solution, the oil can be directly returned or circulated through the filter device by switching the gate valve, which can dynamically adjust the oil flow path to adapt to different working conditions, avoid local overheating, and improve the overall heat dissipation uniformity.

[0015] Optionally, the filtration device also includes a fluid exchange pump and an oil storage tank. The fluid exchange pump is connected to the oil storage tank via a pipeline and is used to replace the insulating oil in the transformer body.

[0016] By adopting the above technical solution, the fluid change pump draws out the waste oil and injects new oil, shortening maintenance time and reducing downtime losses. The oil change process can be linked with the filtration device to ensure the cleanliness of the new oil and avoid secondary contamination.

[0017] Optionally, the sealing ring is made of oil-resistant rubber and is interference-fitted with the outer wall of the tap changer.

[0018] By adopting the above technical solutions, the oil-resistant rubber resists the corrosion of insulating oil, maintains its sealing performance for a long time, and prevents oil leakage or intrusion of external contaminants. The interference fit design enhances the contact pressure between the sealing ring and the tap changer, preventing loosening and failure.

[0019] Optionally, the transparent filter tube is an arc-shaped transparent tube, and is connected to the arc-shaped cap tube through a dispensing tubing, which is fixed by a sealing clamp.

[0020] By adopting the above technical solution, the sealing clamp allows for quick installation and removal of the transparent filter tube, facilitating the replacement of multi-stage filter plates or cleaning of pipelines. The arc-shaped transparent tube adapts to the internal space constraints of transformers, while the flexible connection via the liquid distribution hose reduces the impact of vibration.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. This application, through the cooperation of heat sink, liquid pump, heat pipe, filter device and energy storage device, can effectively reduce external energy consumption. At the same time, the energy storage device converts the kinetic energy of the liquid flow formed by the liquid pump into electrical energy and supplies power to the equipment, thereby reducing the energy consumption of transformer operation. 2. This application, through its multi-level and visual filtering structure, can effectively facilitate staff in judging the purity of the insulating oil inside the transformer, avoiding untimely replacement of the insulating oil due to staff misjudgment, and effectively improving the work efficiency of staff. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application; Figure 2 yes Figure 1 A cross-sectional view along plane AA, mainly showing the liquid level detection column; Figure 3 This is a schematic diagram of the overall structure of Embodiment 2 of this application; Figure 4 This is a structural schematic diagram of Embodiment 2 of this application, mainly illustrating the filtration device and the energy storage device; Figure 5 yes Figure 4Schematic diagram of the cross-sectional structure along plane BB; Figure 6 yes Figure 5 A partial structural diagram at point A in the middle; Figure 7 yes Figure 5 A schematic diagram of the local structure at point B.

[0023] Attached Figure Descriptions: 1. Transformer body; 2. Tap changer; 3. Protective cover; 4. Sealing ring; 5. Liquid level detection column; 6. Marker block; 7. Floating block; 8. Viewing window; 9. Alarm; 10. Heat sink; 11. Temperature detector; 12. Liquid pump; 13. Heat dissipation pipe; 14. Filter device; 1401. Conical tube; 1402. Inlet pipe; 1403. Screen; 1404. Arc-shaped cover tube; 1405. Outlet pipe; 1406. First tee pipe; 1407. Return pipe; 1408. Filter box; 1409. Second tee pipe; 1410. Liquid exchange pump; 1411. Oil storage tank; 1412. Liquid separator hose; 1413. Transparent tube; 1414. Liquid separator. 1415. Transparent filter tube; 15. Energy storage device; 1501. Impeller; 1502. Connecting column; 1503. Magnetic shaft column; 1504. Connecting block; 1505. Elastic rubber; 1506. Charger / discharger; 1507. Energy storage box; 1508. Magnetic bearing; 1509. Energy storage flywheel; 16. First arc-shaped protrusion; 17. Second arc-shaped protrusion; 18. First gate valve; 19. Second gate valve; 20. Third gate valve; 21. Abutment ring; 22. Sealing clamp; 23. Flow-stopping clamp; 24. First sealing connecting sleeve; 25. Second sealing connecting sleeve; 26. Fourth gate valve; 27. Rotating block; 28. Snap-fit ​​sliding groove; 29. ​​Connecting groove; 30. Negative pressure fan. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1 - Appendix Figure 7 This application will be described in further detail below.

[0025] Example 1: An energy-saving oil-immersed transformer, with reference to Figure 1 The transformer includes a transformer body 1, which is filled with insulating oil, immersing the electrical components of the transformer in the oil. A protective device and a detection device are installed on the upper surface of the transformer body 1. Additionally, several heat sinks 10 are fixedly connected to the sidewalls of the outer surface of the transformer body 1, allowing the internal insulating oil to circulate and dissipate heat through the heat sinks 10.

[0026] The protective device includes a tap changer 2, which is threadedly connected to a protective cover 3. The protective cover 3 covers the tap changer and abuts against the surface of the transformer body 1. A sealing ring 4 is embedded in the protective cover 3. The sealing ring 4 is used to prevent external moisture from contacting the tap changer 2, thereby effectively increasing the safety of personnel when operating the tap changer 2.

[0027] refer to Figure 2 The detection device includes a liquid level detection column 5, which has a sliding groove. A marker block 6 is slidably connected within the sliding groove, and a floating block 7 is fixedly connected to the bottom of the marker block 6. The floating block 7 floats on the insulating oil and is a hollow plastic ball that is not easily decomposed. Additionally, a viewing window 8 is provided on one side of the liquid level detection column 5, and the marker block 6 has a first indicator representing a normal liquid level and a second indicator representing a low liquid level. Under normal conditions, the first indicator is located at the viewing window 8. When the insulating oil level drops, the floating block 7 pulls the marker block 6 to slide within the sliding groove, causing the second indicator to be located at the viewing window 8. An alarm 9 is fixedly connected to the top of the liquid level detection column 5. The alarm 9 is linked to the marker block 6 via a connecting rod. When the liquid level drops, the marker block 6 pulls the alarm 9 to sound an alarm, thus reminding personnel to perform maintenance on the transformer body 1.

[0028] refer to Figure 1 A temperature detection port is provided on the upper end face of the transformer body 1, and a temperature detector 11 is fixedly connected to the temperature detection port of the transformer body 1. The temperature detector 11 extends into the oil tank to detect the temperature inside the oil tank.

[0029] The implementation principle of Embodiment 1 of this application is as follows: The transformer body 1 forms a heat transfer channel inside through the heat sink 10 to reduce the heat inside the transformer body 1. In addition, the marker block 6 and the floating block 7 in the liquid level detection column 5 replace the sensor, which can continuously and stably detect changes in liquid level while reducing energy consumption, making it convenient for staff to maintain.

[0030] Example 2: An energy-saving oil-immersed transformer, with reference to Figure 3 The difference between this embodiment and Embodiment 1 is that a liquid pump 12 is fixedly connected to the transformer body 1, and a heat dissipation pipe 13 for heat dissipation of the insulation is fixedly connected to the liquid pump 12. The heat dissipation pipe 13 is connected to a filter device 14 and an energy storage device 15. The filter device 14 is used to filter impurities in the insulating oil, and the energy storage device 15 is used to reduce the energy consumption of the transformer body 1 during use.

[0031] Reference Figure 4 , Figure 5The filter device 14 includes a tapered tube 1401. One end of the tapered tube 1401 is fixedly connected to a first arc-shaped protrusion 16, and the other end of the tapered tube 1401 is fixedly connected to a second arc-shaped protrusion 17. In addition, the arc-shaped protruding surfaces of the first arc-shaped protrusion 16 and the second arc-shaped protrusion 17 both extend into the tapered tube 1401, so that the first arc-shaped protrusion 16, the second arc-shaped protrusion 17, and the tapered tube 1401 cooperate to form a filter chamber.

[0032] Reference Figure 4 , Figure 5 , Figure 6 An access pipe 1402 communicating with the inside of the tapered tube 1401 is fixedly connected to the side wall of the tapered tube 1401 near the first arc-shaped protrusion 16. An arc-shaped screen 1403 is fixedly connected to the inner wall of the tapered tube 1401 near the second arc-shaped protrusion 17, and the mesh count of the screen 1403 gradually increases from the first arc-shaped protrusion 16 to the second arc-shaped protrusion 17.

[0033] Reference Figure 3 , Figure 4 , Figure 6 An arc-shaped cover tube 1404 is axially fitted onto the screen 1403 at the conical tube 1401. The arc-shaped cover tube 1404 covers the screen 1403, and an outflow pipe 1405 communicating with the interior of the conical tube 1401 is fixedly connected to the side wall of the arc-shaped cover tube 1404. A first three-way pipe 1406 is fixedly connected to the outflow pipe 1405, and a first gate valve 18 is fixedly connected to each of the two liquid outlets of the first three-way pipe 1406. One of the first gate valves 18 is connected to the transformer body 1 through a return pipe 1407, and the other first gate valve 18 is connected to a filter box 1408 for filtering insulating oil.

[0034] Reference Figure 4 The oil outlet of the filter box 1408 is fixedly connected to a second three-way pipe 1409, and the second three-way pipe 1409 is fixedly connected to two second gate valves 19. One of the second gate valves 19 is located between the filter box 1408 and the second three-way pipe 1409, and the other second gate valve 19 is fixedly connected to a liquid exchange pump 1410. The liquid exchange pump 1410 is connected to an oil storage tank 1411 for storing unused insulating oil through a pipeline. At the same time, the second three-way pipe 1409 is fixedly connected to a return pipe 1407, and a third gate valve 20 is fixedly connected at the connection between the second three-way pipe 1409 and the return pipe 1407.

[0035] Reference Figure 5 , Figure 6An arc-shaped cap tube 1404 is fixedly connected to a dispensing tubing 1412 at the end furthest from the first arc-shaped protrusion 16, and an arc-shaped transparent tube 1413 is fixedly connected to the dispensing tubing 1412. Both the dispensing tubing 1412 and the transparent tube 1413 are fitted onto the outer surface of the tapered tube 1401. Additionally, a contact ring 21 is threaded onto the tapered tube 1401, and the contact ring 21 abuts against the end of the transparent tube 1413 furthest from the dispensing tubing 1412. A sealing groove is provided on the transparent tube 1413. At the same time, a relief groove corresponding to the position of the sealing groove is provided on the surface of the tapered tube 1401. The liquid distribution tube 1412 extends into the sealing groove and the relief groove. The liquid distribution tube 1412 is fitted with a sealing clamp 22. After installation, the sealing cable tie can be removed and extended into the sealing groove. In addition, a flow-blocking clamp 23 is fitted between the arc-shaped cap tube 1404 and the transparent tube 1413 on the liquid distribution tube 1412.

[0036] Reference Figure 4 , Figure 5 , Figure 6 A transparent tube 1413 is fixedly connected to a liquid separator 1414. A first sealing sleeve 24 is fixedly connected to the liquid separator 1414. A transparent filter tube 1415 is fixedly connected to the first sealing sleeve 24. A multi-stage filter plate is installed inside the transparent filter tube 1415. In addition, a second sealing sleeve 25 is transitionally connected to the bottom of the transparent filter tube 1415. The second sealing sleeve 25 is connected to the return pipe 1407. A fourth gate valve 26 is fixedly connected between the second sealing sleeve 25 and the return pipe 1407.

[0037] Reference Figure 5 , Figure 7 The energy storage device 15 includes an impeller 1501 fixedly connected to a first arc-shaped protrusion 16. The shaft of the impeller 1501 passes through the first arc-shaped protrusion 16 and is fixedly connected to a connecting post 1502. A rotating block 27 is fixedly connected to one end of the connecting post 1502 away from the impeller 1501. A rotating groove is formed inside the rotating block 27, and several permanent magnets are fixedly connected to the inner wall of the rotating groove. A magnetic shaft post 1503 is rotatably connected inside the rotating block 27. At the same time, the magnetic shaft post 1503 extends into the rotating groove, so that there is a magnetic connection between the magnetic shaft post 1503 and the rotating block 27. In addition, a magnetic positioning plate is fixedly connected to the magnetic shaft post 1503. The magnetic positioning plate and the permanent magnet form a magnetic engagement, thereby limiting the position of the magnetic positioning plate inside the rotating block 27.

[0038] The rotating block 27 has several snap-fit ​​grooves 28 inside, and a capsule-shaped metal connecting block 1504 is slidably connected in the snap-fit ​​grooves 28. The magnetic shaft 1503 has several connecting grooves 29 corresponding to the connecting blocks 1504. The connecting blocks 1504 extend into the connecting grooves 29 and are fixed by magnetic connection. At the same time, an elastic rubber 1505 is fixedly connected to the surface of the magnetic shaft 1503 at the connecting groove 29, and the opening of the connecting groove 29 is arc-shaped and smoothly transitions to the surface of the magnetic shaft 1503.

[0039] Reference Figure 3 , Figure 5 , Figure 7 A charge / discharge motor 1506 is mounted on a magnetic shaft 1503. The charge / discharge motor 1506 is electrically connected to the liquid pump 12 and the liquid exchange pump 1410. An energy storage box 1507 is also mounted on the outer sleeve of the magnetic shaft 1503. A magnetic bearing 1508 is fixedly connected to the side of the energy storage box 1507 away from the charge / discharge motor 1506. The magnetic shaft 1503 passes through the magnetic bearing 1508 and is magnetically connected to it, suspending the magnetic shaft 1503 within the bearing 1508. An energy storage flywheel 1509 is mounted on the portion of the magnetic shaft 1503 within the energy storage box 1507. A negative pressure fan 30 is also fixedly connected to the energy storage box 1507 and communicates with the interior of the energy storage box 1507 via a pipe.

[0040] The implementation principle of Embodiment 2 of this application is as follows: When the transformer body 1 is running, the liquid pump 12 draws the insulating oil in the transformer body 1 into the heat dissipation pipe 13, where it exchanges heat with the insulating oil in the heat dissipation pipe 13, and at the same time, a liquid flow is formed in the heat dissipation pipe 13 towards the conical pipe 1401.

[0041] When the liquid enters the conical tube 1401, it drives the liquid flow impeller 1501 to rotate. After the impeller 1501 rotates, it drives the magnetic shaft column 1503 and the energy storage flywheel 1509 to rotate synchronously, thereby enabling the charge / discharge machine 1506 to charge. The liquid flows along the arc surface of the first arc-shaped protrusion 16 and flows along the extension and contraction direction of the conical tube 1401. At the same time, when the impeller 1501 rotates continuously and stably, the insulating oil forms a vortex in the conical tube 1401, causing impurities in the insulating oil to be affected by centrifugal force. After passing through the screen 1403, they flow into the arc-shaped cover tube 1404 and return to the transformer body 1 from the outflow pipe 1405 above the arc-shaped cover tube 1404 through the first three-way pipe 1406 and the return pipe 1407. In addition, when the charge / discharger 1506 is charged to a certain level, it supplies power to the impeller 1501, the liquid pump 12, and the liquid exchange pump 1410, thereby reducing the energy consumption of the transformer during use.

[0042] Furthermore, when the impeller 1501 rotates too fast, that is, when the centrifugal force on the connecting block 1504 is greater than the magnetic attraction force, the connecting block 1504 extends out of the connecting groove 29, causing the connecting post 1502 to separate from the magnetic shaft post 1503. At this time, the impeller 1501 gradually decelerates. Simultaneously, the connecting block 1504 rubs against the elastic rubber 1505 of the magnetic shaft post 1503, thereby slowing down the rotational speed of the magnetic shaft post 1503 until the rotational speed decreases, and the centrifugal force on the connecting block 1504 is less than the magnetic attraction force. Then, the connecting block 1504 extends into the connecting groove 29 during the rotation of the impeller 1501.

[0043] Part of the insulating oil flows from the arc-shaped cover tube 1404 through the liquid distribution tube 1412 into the transparent tube 1413, and then from the transparent tube 1413 into the transparent filter tube 1415 for filtration. During this process, the operator can directly observe the condition of the filtered oil in the transparent filter tube 1415 and the condition of the filtered insulating oil, thereby determining the content of impurities in the insulating oil. In addition, the transparent filter tube 1415 can be removed by closing the flow-stopping clamp 23 and the fourth gate valve 26, and opening the sealing clamp 22, the first sealing connection sleeve 24, and the second sealing connection sleeve 25, so that the operator can replace the internal multi-stage filter plates.

[0044] When the impurity content in the insulating oil is too high, close the first gate valve 18 connected to the return pipe 1407, and open the first gate valve 18 and the third gate valve 20 connected to the filter box 1408, so that the insulating oil can flow into the filter box 1408 for comprehensive filtration. Then observe the filtration situation in the transparent filter tube 1415 again. If the filtration situation is still not good, the insulating oil in the transformer body 1 needs to be replaced to ensure the stable operation of the transformer body 1.

[0045] When replacing the insulating oil, the pump 12 is separated from the heat dissipation pipe 13, and a pipe is connected to the pumping pipe to connect it to the wastewater tank. The waste oil is then pumped out by the pump 12. Subsequently, the second gate valve 19 connected to the filter box 1408 is closed, and the second gate valve 19 and the third gate valve 20 connected to the oil replacement pump 1410 are opened, allowing the insulating oil in the oil storage tank 1411 to flow into the transformer body 1.

[0046] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. An energy-saving oil-immersed transformer, characterized in that: The transformer body (1) is filled with insulating oil, and the transformer body (1) is provided with: A protective device for protecting the tap changer (2) on the surface of the transformer body (1); The heat dissipation structure has a number of heat dissipation fins (10) fixedly connected to the side wall of the outer surface of the transformer body (1). The heat dissipation fins (10) and the interior of the transformer body (1) form a heat transfer channel for the self-circulation heat dissipation of the insulating oil. A liquid level detection device includes a liquid level detection column (5), a sliding groove is provided in the liquid level detection column (5), a marker block (6) is slidably connected in the sliding groove, a floating block (7) made of hollow plastic ball is fixedly connected to the bottom of the marker block (6), a viewing window (8) is provided on one side of the liquid level detection column (5), a first mark and a second mark are provided on the marker block (6), the first mark is used to indicate that the liquid level is normal, the second mark is used to indicate that the liquid level is too low, and an alarm (9) is provided on the top of the liquid level detection column (5), the alarm (9) is linked with the marker block (6); A temperature detection device is provided, wherein a temperature detection port is provided on the upper end face of the transformer body (1), and a temperature detector (11) is fixedly connected to the temperature detection port, and the temperature detector (11) extends into the interior of the transformer body (1). A liquid pump (12) is connected to the transformer body (1); A heat dissipation pipe (13) is connected to the liquid pump (12) for circulating heat dissipation of insulating oil; The filter device (14), connected to the heat dissipation pipe (13), includes a tapered pipe (1401), an inlet pipe (1402), an arc-shaped screen (1403), and an outlet pipe (1405). The tapered pipe (1401) has a first arc-shaped protrusion (16) and a second arc-shaped protrusion (17) at both ends. The mesh count of the arc-shaped screen (1403) gradually increases from the first arc-shaped protrusion (16) to the second arc-shaped protrusion (17). An energy storage device (15), connected to the liquid pump (12), includes an impeller (1501), a magnetic shaft (1503), a charge / discharger (1506), and an energy storage flywheel (1509). The impeller (1501) drives the magnetic shaft (1503) to rotate through the liquid flow. The charge / discharger (1506) is used to store energy and supply power to the liquid pump (12). A charge / discharge machine (1506) is fitted onto the magnetic shaft (1503). The charge / discharge machine (1506) is electrically connected to the liquid pump (12) and the liquid exchange pump (1410). An energy storage box (1507) is fitted onto the magnetic shaft (1503). A magnetic bearing (1508) is fixedly connected to the side of the energy storage box (1507) away from the charge / discharge machine (1506). A magnetic shaft (1503) passes through the magnetic bearing (1508) and is magnetically connected to the magnetic bearing (1508). The magnetic shaft (1503) is suspended inside the magnetic bearing (1508). The magnetic shaft (1503) is fitted with an energy storage flywheel (1509) on part of the energy storage box (1507).

2. The energy-saving oil-immersed transformer according to claim 1, characterized in that: The protective device is used to protect the tap changer (2) on the surface of the transformer body (1). The tap changer (2) is threadedly connected to a protective cover (3). The protective cover (3) abuts against the surface of the transformer body (1), and a sealing ring (4) is fixedly connected inside the protective cover (3).

3. The energy-saving oil-immersed transformer according to claim 1, characterized in that: The energy storage device (15) also includes an elastic rubber sheet (1505) and a metal connecting block (1504). The connecting block (1504) is fixed in the connecting groove (29) of the magnetic shaft (1503) by magnetic adsorption. When the centrifugal force on the connecting block (1504) is greater than the magnetic attraction force, the connecting hole of the connecting block (1504) abuts against the elastic rubber sheet (1505).

4. The energy-saving oil-immersed transformer according to claim 1, characterized in that: A first tee pipe (1406) and a return pipe (1407) are provided between the heat dissipation pipe (13) and the transformer body (1). The first tee pipe (1406) is used to control the return path of the insulating oil, and the first tee pipe (1406) is provided with a first gate valve (18).

5. The energy-saving oil-immersed transformer according to claim 1, characterized in that: The filtration device (14) also includes a fluid exchange pump (1410) and an oil storage tank (1411). The fluid exchange pump (1410) is connected to the oil storage tank (1411) through a pipeline and is used to replace the insulating oil in the transformer body (1).

6. The energy-saving oil-immersed transformer according to claim 2, characterized in that: The sealing ring (4) is made of oil-resistant rubber and is interference-fitted with the outer wall of the tap changer (2).

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