A high-efficiency oil-immersed transformer capable of rapid exhaust

Abstract

The application discloses a high-efficiency oil-immersed transformer capable of rapid exhaust, and belongs to the technical field of oil-immersed transformers, which comprises a transformer body, wherein the transformer body comprises an oil tank, an oil guide assembly is arranged on the oil tank, the oil guide assembly comprises an oil guide pipe fixed to the oil tank, new oil is accelerated in a spiral motion through spiral leaves arranged in the oil guide pipe, and an exhaust pipe is arranged on the oil guide pipe; the oil guide assembly and a layered oil injection assembly are arranged, spiral leaves are used to guide the spiral acceleration of oil, centrifugal force is used to gather bubbles to the center of the pipe, the non-spiral section pressure recovery, the exhaust pipe and the oil distribution member are used to realize efficient exhaust, the floating plate is used to trigger the rotation of the switch plate according to the change of the liquid level, the linkage push rod is used to push the elastic partition plate to be inclined, the intelligent opening and closing of the lower oil distribution chamber, the middle oil distribution chamber and the upper oil distribution chamber are realized, and the new oil is injected in the order of "upper layer, middle layer and lower layer".

Description

Technical Field

[0001] This invention relates to the field of oil-immersed transformer technology, and more particularly to a high-efficiency oil-immersed transformer with rapid venting capability. Background Technology

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are the primary coil, the secondary coil, and the iron core (magnetic core). Its main functions include voltage transformation, current transformation, impedance transformation, isolation, and voltage stabilization (magnetic saturation transformer). Transformers are basic equipment for power transmission and distribution and are widely used in industry, agriculture, transportation, urban communities and other fields.

[0003] The components of a transformer include the transformer body (iron core, windings, insulation, leads), transformer oil, oil tank and cooling device, voltage regulating device, protection device (dehumidifier, safety vent, gas relay, oil conservator and temperature measuring device, etc.) and outgoing bushings. In order to enhance insulation and cooling conditions, the iron core and windings of an oil-immersed transformer are immersed together in an oil tank filled with transformer oil.

[0004] Traditionally manufactured oil-immersed transformers commonly suffer from the following technical challenges during oil filling, operation, and maintenance: 1. Conventional oil filling methods lack an effective venting mechanism, making it easy for air bubbles to mix into the oil. These bubbles are randomly distributed in the oil flow, forming localized thermal resistance layers that hinder heat conduction to the heat sinks, leading to an increased internal temperature gradient and accelerated aging of the insulating oil. 2. After a period of use, transformers require oil replenishment. However, the old oil in the tank exhibits temperature stratification due to long-term operation (the upper layer is warmer than the lower layer). Traditional oil filling methods often employ single-point injection, with new oil directly entering a specific oil layer. This results in insufficient mixing of new and old oil, creating localized temperature abrupt changes. Such temperature differences can cause uneven thermal stress in the core and windings, increasing the risk of material fatigue. Furthermore, the temperature difference between new and old oil can lead to the precipitation of dissolved gases, exacerbating the bubble problem. Summary of the Invention

[0005] The purpose of this invention is to provide a high-efficiency oil-immersed transformer with rapid venting capability, in order to solve the problem of the lack of an effective venting mechanism in conventional oil filling methods.

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

[0007] A high-efficiency oil-immersed transformer with rapid venting includes a transformer body, the transformer body including an oil tank, an oil guiding assembly mounted on the oil tank, the oil guiding assembly including an oil guiding pipe fixed on the oil tank, new oil is accelerated by a spiral blade installed in the oil guiding pipe, and an venting pipe is mounted on the oil guiding pipe.

[0008] The oil tank is equipped with a layered oil injection assembly, which includes an oil injection ring. One side of multiple oil injection rings is equipped with an oil distributor. The oil distributor delivers oil to oil injection rings at different positions via a float plate mounted on the oil injection ring.

[0009] As a further description of the above technical solution:

[0010] The oil distribution component includes an oil distribution pipe fixed on an oil injection ring. A stepped seat is fixed inside the oil distribution pipe. Two partition plates are on the stepped seat. The inner cavity of the oil distribution pipe is divided into a lower oil distribution chamber, a middle oil distribution chamber, and an upper oil distribution chamber by the partition plates.

[0011] As a further description of the above technical solution:

[0012] The lower oil distribution chamber, the middle oil distribution chamber, and the upper oil distribution chamber are respectively connected to three oil injection rings through conveying pipes. A guide pipe is fixed at the top of the oil distribution pipe. One end of the guide pipe that enters the oil distribution pipe is in contact with one side wall of the lower oil distribution chamber, and the other end of the guide pipe is connected to the end of the guide pipe that enters the oil tank.

[0013] As a further description of the above technical solution:

[0014] Two mounting slots are provided on the outer wall of the oil distribution pipe, and a switch plate is rotatably connected in each of the two mounting slots.

[0015] As a further description of the above technical solution:

[0016] Mounting holes are provided at the top and bottom of both sides of the mounting groove. A spherical column is connected to the mounting hole through a first spring. Limiting holes adapted to the spherical column are provided at the top and bottom of both sides of the switch plate.

[0017] As a further description of the above technical solution:

[0018] The bottom of each of the two mounting slots is slidably connected to a sliding rod by opening a sliding groove. One end of the sliding rod, which passes through the oil distribution pipe, is fixed with a push rod. A second spring is sleeved on the outer surface of the sliding rod, and the two ends of the second spring are respectively connected to the push rod and one side wall of the oil distribution pipe.

[0019] As a further description of the above technical solution:

[0020] Two retaining rods are fixed on the upper oil injection ring, and the float is slidably mounted on the retaining rods.

[0021] As a further description of the above technical solution:

[0022] Both the inner wall of the oil guide pipe and the outer wall of the spiral blade are fixed with bubble cones. The top of the outer wall of the oil distribution pipe is provided with an exhaust groove, and the outlet end of the exhaust pipe is provided with an exhaust one-way valve.

[0023] As a further description of the above technical solution:

[0024] The transformer body also includes an iron core assembled inside the oil tank, the iron core is provided with windings, the top of the oil tank is equipped with an insulating sleeve, the bottom of the oil tank is equipped with an oil drain pipe, and the outer wall of the oil tank is provided with heat dissipation fins.

[0025] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0026] By setting up oil guiding components and layered oil injection components, the oil is guided to move in a spiral acceleration by spiral blades, and the centrifugal force is used to make the air bubbles gather towards the center of the pipeline. Combined with the pressure recovery of the spiral section and the exhaust pipe, efficient exhaust is achieved.

[0027] Simultaneously, the oil separator triggers the switch plate to rotate via the float plate as the liquid level changes. The linkage push rod pushes the elastic partition plate to tilt, realizing the intelligent opening and closing of the lower oil separator / middle oil separator / upper oil separator. This allows new oil to be injected in the order of "upper layer → middle layer → lower layer", solving the problem of old oil temperature stratification, promoting rapid mixing of new and old oil, and avoiding local temperature changes and dissolved gas precipitation. Attached Figure Description

[0028] Figure 1 A schematic diagram of the internal structure of a fuel tank according to an embodiment of the present invention is shown;

[0029] Figure 2 A schematic diagram of the internal structure of the oil distribution pipe provided according to an embodiment of the present invention is shown;

[0030] Figure 3 A schematic diagram of the switchboard after rotation according to an embodiment of the present invention is shown;

[0031] Figure 4 A schematic diagram of the overall structure of the oil distribution pipe provided according to an embodiment of the present invention is shown;

[0032] Figure 5 A schematic diagram of the structure of the partition plate after tilting according to an embodiment of the present invention is shown;

[0033] Figure 6 The present invention provides an embodiment of the invention. Figure 2 Enlarged view of point A in the middle;

[0034] Figure 7 A schematic diagram of the internal structure of the oil guide pipe provided according to an embodiment of the present invention is shown;

[0035] Figure 8 The present invention provides an embodiment of the invention. Figure 7 Enlarged view of point B in the middle;

[0036] Figure 9 A schematic diagram of the overall structure provided according to an embodiment of the present invention is shown.

[0037] Legend:

[0038] 10. Transformer body; 11. Oil tank; 12. Iron core; 13. Insulating bushing; 14. Heat sink;

[0039] 20. Oil guiding assembly; 21. Oil guiding pipe; 22. Spiral blade; 23. Exhaust pipe; 24. Spiral cone;

[0040] 30. Layered oil injection assembly; 31. Oil injection ring; 32. Oil distribution component; 321. Oil distribution pipe; 322. Stepped seat; 323. Divider plate; 324. Lower oil distribution chamber; 325. Middle oil distribution chamber; 326. Upper oil distribution chamber; 327. Delivery pipe; 328. Guide pipe; 329. Switch plate; 3210. First spring; 3211. Spherical column; 3212. Slide rod; 3213. Push rod; 3214. Second spring; 33. Holding rod; 34. Float plate. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0042] like Figure 1 - Figure 9 As shown, the present invention provides:

[0043] A high-efficiency oil-immersed transformer with rapid venting includes a transformer body 10, an oil tank 11, and an iron core 12 assembled inside the oil tank 11. The iron core 12 is provided with windings. An insulating sleeve 13 is assembled on the top of the oil tank 11, and an oil drain pipe is assembled on the bottom of the oil tank 11. Heat sinks 14 are provided on the outer wall of the oil tank 11. In particular, the remaining structural components of the transformer body 10 are not described in detail here. Preferably, a control valve is provided at the end of the oil drain pipe to control the discharge of old oil in the oil tank 11.

[0044] like Figure 1 , Figure 7 and Figure 8As shown, an oil guiding assembly 20 is installed on the oil tank 11. The oil guiding assembly 20 includes an oil guiding pipe 21 fixed on the oil tank 11. New oil is accelerated by a spiral blade 22 installed in the oil guiding pipe 21. An exhaust pipe 23 is installed on the oil guiding pipe 21.

[0045] Specifically, the spiral blade 22 is located at the front section of the oil guide pipe 21, while the rear section of the oil guide pipe 21 is in a normal circular pipe state. In this state, after new oil enters the oil guide pipe 21, the spiral blade 22 guides the oil to form a spiral acceleration motion. Centrifugal force is used to make the air bubbles (lightweight) gather towards the central axis of the pipe. In the spiral flow channel, a significant pressure gradient is formed in the radial direction—the pressure is lowest at the center. Under the action of pressure difference, the air bubbles migrate towards the center and gather into clusters. When the new oil flow enters the non-spiral section, the pressure rises and causes the gathered air bubbles to be discharged through the exhaust pipe 23, reducing residual air bubbles.

[0046] Meanwhile, the spiral structure disrupts the thermal boundary layer through the secondary circulation effect, reducing new bubbles generated by turbulent shearing. At the same time, the spiral flow channel extends the oil's accelerated rotation path, increasing the number of times bubbles rotate with the oil flow and improving bubble removal efficiency.

[0047] Both the inner wall of the oil guide pipe 21 and the outer wall of the spiral blade 22 are fixed with bubble cones 24. The top of the outer wall of the oil distribution pipe 321 is provided with an exhaust groove. Preferably, the maximum liquid level of the oil in the oil tank 11 is lower than the exhaust groove. The outlet end of the exhaust pipe 23 is provided with an exhaust check valve. At the same time, the outlet end of the exhaust pipe 23 is also provided with a dustproof net, and rainwater will not enter the outlet end of the exhaust pipe 23. In particular, the exhaust pipe 23 is provided with a gas relay, and the gas does not bypass the gas relay, thereby avoiding delays in internal fault detection. In addition, during the vacuum oil filling stage, the exhaust pipe 23 needs to be used in conjunction with a vacuum pump to avoid air residue and ensure the sealing of the initial oil filling process.

[0048] During transformer operation, the gas generated in the oil tank 11 can enter the oil distribution pipe 321 through the exhaust channel, and then enter the exhaust pipe 23 through the guide pipe 328 to be discharged to the outside. It is worth noting that, preferably, the bubble cones 24 located on the inner wall of the oil guide pipe 21 are spirally distributed, and their spiral lines are symmetrical with the spiral lines of the spiral blades 22. Specifically, the bubble cones 24 increase the surface roughness of the inner wall of the oil guide pipe 21 and the spiral blades 22, providing more vaporization nuclei, adsorbing the surface of the bubbles and increasing their stiffness, and inhibiting bubble coalescence (small bubbles existing alone can expand the gas-liquid contact area and accelerate gas dissolution or discharge). At the same time, the bubble cones 24 can change the local flow field, forming micro-vortices or turbulent boundary layers, promoting the "stripping" of bubbles near the wall and their discharge with the mainstream.

[0049] like Figure 1 and Figure 2As shown, the oil tank 11 is equipped with a layered oil injection assembly 30. The layered oil injection assembly 30 includes an oil injection ring 31. One side of multiple oil injection rings 31 is equipped with an oil distribution component 32. The oil distribution component 32 delivers oil to the oil injection rings 31 at different positions via a float plate 34 mounted on the oil injection rings 31.

[0050] The oil distribution component 32 includes an oil distribution pipe 321 fixed to the oil injection ring 31. A stepped seat 322 is fixed inside the oil distribution pipe 321. Two partition plates 323 are on the stepped seat 322. In the initial state, the two partition plates 323 are in a vertical state, and the two partition plates 323 are of different lengths. In particular, the partition plates 323 are elastic plates that can tilt after being subjected to force and can return to a vertical state after the force is released. The inner cavity of the oil distribution pipe 321 is divided into a lower oil distribution chamber 324, a middle oil distribution chamber 325 and an upper oil distribution chamber 326 by the partition plates 323. It is worth noting that sealing strips are provided on both sides of the partition plates 323 to keep them sealed with the inner wall of the oil distribution pipe 321. However, the setting of the sealing strips does not prevent the partition plates 323 from tilting after being subjected to force.

[0051] The lower oil distribution chamber 324, the middle oil distribution chamber 325, and the upper oil distribution chamber 326 are respectively connected to the three oil injection rings 31 through the delivery pipe 327. The top of the oil distribution pipe 321 is fixed with a guide pipe 328. One end of the guide pipe 328 that enters the oil distribution pipe 321 is in contact with one side wall of the lower oil distribution chamber 324. It is worth noting that one end of the guide pipe 328 has an opening to allow oil to flow downward along the inner wall of the oil distribution pipe 321, so that the new oil entering the guide pipe 328 can flow downward along the inner wall. The other end of the guide pipe 328 is connected to the end of the guide pipe 21 that enters the oil tank 11.

[0052] like Figure 1 , Figure 2 and Figure 6 As shown, two mounting slots are provided on the outer wall of the oil distribution pipe 321, and a switch plate 329 is rotatably connected in each of the two mounting slots. In particular, the outer wall of the switch plate 329 is divided into two parts: the upper part is a vertical section and the lower part is an inclined section. The outer wall of the vertical section is flush with the outer wall of the oil distribution pipe 321, while the inclined section is protruding. In the initial state, the upper part of the switch plate 329 is completely in the mounting slot, while the lower part is only partially in the mounting slot. It is worth noting that a sealing gasket is provided on the inner wall of the mounting slot, so that the switch plate 329 and the mounting slot are in a sealed state. That is to say, during the rotation and non-rotation of the switch plate 329, the mounting slot is always in a sealed state, and the oil will not enter the inside of the slot through the gap between the switch plate 329 and the mounting slot.

[0053] Mounting holes are provided at the top and bottom of both sides of the mounting groove. A spherical column 3211 is connected to the mounting hole through a first spring 3210. Limiting holes that are adapted to the spherical column 3211 are provided at the top and bottom of both sides of the switch plate 329. It should be noted that during the rotation of the switch plate 329, the upper or lower limiting hole will always be exposed in the oil tank 11. When the exposed limiting hole re-enters the mounting groove with the rotation of the switch plate 329, a small amount of oil will remain in the hole and then enter the mounting groove with the limiting hole. This small amount of oil will not have an adverse effect on the switch plate 329 or the interior of the mounting groove.

[0054] The bottom of one side wall of each of the two mounting slots is slidably connected to a slide rod 3212 by opening a sliding groove. One end of the slide rod 3212 that passes through the oil distribution pipe 321 is fixed with a push rod 3213. The outer surface of the slide rod 3212 is fitted with a second spring 3214. The two ends of the second spring 3214 are respectively connected to the push rod 3213 and one side wall of the oil distribution pipe 321.

[0055] Specifically, in the initial state, the end of the slide bar 3212 that passes through the mounting groove is in contact with the lower half of the switch plate 329. It is worth noting that the elastic force of the second spring 3214 is less than that of the first spring 3210, and the elastic force of the first spring 3210 is greater than the sum of the elastic forces generated by the second spring 3214 and the partition plate 323 after tilting. That is, when the switch plate 329 rotates to the point where the lower half is in the mounting groove, the lower half of the switch plate 329 will push the slide bar 3212 to slide towards the oil distribution pipe 321, thereby driving the push rod 3213 to move together, thereby pushing the partition plate 323 to tilt. At this time, the first spring 3210 will always push the spherical column 3211 to engage in the limiting hole located below, so that the switch plate 329 can maintain this state.

[0056] like Figure 1 , Figure 3 and Figure 5 As shown, in order to enable the float plate 34 to move vertically up and down, two retaining rods 33 are fixed on the upper oil injection ring 31. The float plate 34 is slidably installed on the retaining rods 33. It is worth noting that the float plate 34 floats on the oil surface, and as the float plate 34 descends with the liquid surface, it can push the inclined section of the lower half of the switch plate 329 inward by its own weight, so that the lower half of the switch plate 329 enters the mounting groove, while the upper half of the switch plate 329 rotates to an inclined position. In particular, a certain gap is left between the end of the float plate 34 near the oil distribution pipe 321 and the upper half of the switch plate 329 to ensure that the float plate 34 can smoothly push the lower or upper half of the switch plate 329 to rotate without causing obstruction as it moves down or up with the liquid surface.

[0057] Specifically, in the initial state, the maximum oil level in the oil tank 11 is lower than the top of the oil distribution pipe 321. During the operation of the transformer, the oil level will drop, and the float plate 34 will also drop along with it. As the float plate 34 descends, it will first gradually come into contact with the switch plate 329 located above. After contacting the lower half of the switch plate 329, as the float plate 34 continues to move downward, it will push the switch plate 329 to rotate, causing the lower half to rotate into the mounting groove while the upper half protrudes out of the mounting groove. During this process, the lower half of the switch plate 329 will push the slide rod 3212 to slide towards the side of the oil distribution pipe 321, thereby driving the push rod 3213 to move together, thereby pushing the long partition plate 323 to tilt, so that the top of the long partition plate 323 is in contact with the inner wall of the oil distribution pipe 321. In this state, the lower oil distribution chamber 324 is closed. As the oil level continues to drop, the float plate 34 continues to descend.

[0058] When it comes into contact with the lower switch plate 329, as it continues to move downward, it will drive the lower switch plate 329 to rotate, thereby pushing the lower slide rod 3212 against the lower slide rod and sliding towards the side of the oil distribution pipe 321. This will drive the push rod 3213 to move together, thereby pushing the short partition plate 323 to tilt, so that the top of the short partition plate 323 is in contact with the outer wall of the long partition plate 323. In this state, the middle oil distribution chamber 325 is closed. At this time, only the upper oil distribution chamber 326 is open. In this state, when oil is replenished, the new oil injected through the guide pipe 328 flows down along the inner wall of the oil distribution pipe 321 and flows towards the short partition plate 323 under the guidance of the tilted long partition plate 323. Under the action of the short partition plate 323, it flows into the lower oil distribution chamber 324 and is sent into the upper oil injection ring 31 through the delivery pipe 327. Then, the new oil is sent into the upper layer of the old oil in the oil tank 11 through the upper oil injection ring 31.

[0059] During the gradual oil filling process, the liquid level gradually rises. At this time, the float plate 34 will move upward. When it moves to contact the switch plate 329 below, it will continue to move upward. During this process, it will push the upper half of the switch plate 329 in the tilted state and rotate it into the mounting groove, so that it returns to the vertical state. At this time, the lower half of the switch plate 329 will rotate back to the outside of the mounting groove and return to the tilted state. During this process, the switch plate 329 will gradually release the push against the slide rod 3212. The slide rod 3212 will reset under the action of the second spring 3214, releasing the push rod 3213 from the push against the short partition plate 323. The short partition plate 323 will also return to the vertical state under its own elastic force. At this time, the middle oil chamber 325 will reopen. In this state, new oil will enter the middle oil chamber 325 through the tilted long partition plate 323, and then enter the oil filling ring 31 located in the middle, thereby sending the new oil into the middle layer of the old oil in the oil tank 11.

[0060] During the continued oil injection process, the float 34 continues to move upward, thereby contacting the switch plate 329 located above, causing the switch plate 329 to rotate to its initial state. During this process, the obstruction of the upper slide rod 3212 is released, allowing the slide rod 3212 to reset under the action of the second spring 3214. The obstruction of the push rod 3213 on the long partition plate 323 is released, allowing the long partition plate 323 to return to its vertical state. At this time, the lower oil distribution chamber 324 reopens, and the injected new oil can flow down along the inner wall of the oil distribution pipe 321 into the lower oil distribution chamber 324, and then into the lower oil injection ring 31, thereby sending the new oil into the lower layer of the old oil in the oil tank 11. This layered injection method allows the new oil to mix quickly with the old oil in the tank.

[0061] Preferably, the new oil needs to be heated during oil filling to make its temperature comparable to that of the old oil. It is worth noting that in order to ensure that the partition plate 323 can guide the new oil after tilting, the top of the partition plate 323 is tilted. When the long partition plate 323 abuts against the inner wall of the oil distribution pipe 321, the new oil flowing down the inner wall of the oil distribution pipe 321 will flow through the tilted end of the long partition plate 323 to the surface of the long partition plate 323, and then flow along the surface of the long partition plate 323 to the middle oil distribution chamber 325. On this basis, when the short partition plate 323 abuts against the long partition plate 323, the oil flowing to the surface of the long partition plate 323 will flow through the tilted end of the short partition plate 323 to its surface, and then flow along the surface of the short partition plate 323 to the lower oil distribution chamber 324. It is also worth noting that the oil outlet of the oil filling ring 31 faces downward and is equipped with a one-way valve in the oil outlet to prevent the old oil in the tank from entering the oil filling ring 31.

[0062] Specifically, the high-efficiency oil-immersed transformer, which is supposed to have rapid venting, during operation / use:

[0063] 1. Oil injection and venting: New oil enters through the oil guide pipe 21, and the front spiral blade 22 accelerates the rotation to form a spiral flow. Under the action of centrifugal force and pressure gradient, the bubbles gather towards the center and agglomerate into clusters.

[0064] When entering the non-spiral section, the pressure rises, and the accumulated bubbles are discharged through the exhaust pipe 23. The bubble-piercing cone 24 simultaneously adsorbs the bubble surface to inhibit aggregation and accelerates gas dissolution or discharge.

[0065] 2. Layered oil injection: As the oil level in the tank 11 decreases, the float plate 34 sequentially presses the upper / lower switch plate 329, which in turn pushes the long / short separator plate 323 to tilt via the slide rod 3212 and the push rod 3213, closing the lower oil chamber 324 and the middle oil chamber 325 in sequence, while only the upper oil chamber 326 is opened, and new oil is injected into the upper layer through the upper oil injection ring 31;

[0066] When the liquid level rises, the float plate 34 reverses and presses the switch plate 329 to gradually restore the opening and closing status of each oil distribution chamber, so as to realize the sequential oil injection of the middle layer / lower layer.

[0067] 3. Daily venting: During transformer operation, the gas in the oil tank 11 enters the guide pipe 328 through the venting groove at the top of the oil distribution pipe 321, and is discharged to the outside through the venting pipe 23. The venting check valve prevents external pollution, and the gas relay monitors the fault gas in real time.

[0068] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-efficiency oil-immersed transformer with rapid venting capability, comprising a transformer body (10), wherein the transformer body (10) includes an oil tank (11), characterized in that, The oil tank (11) is equipped with an oil guiding assembly (20), which includes an oil guiding pipe (21) fixed on the oil tank (11). New oil is accelerated by a spiral blade (22) installed in the oil guiding pipe (21). An exhaust pipe (23) is installed on the oil guiding pipe (21). The oil tank (11) is equipped with a layered oil injection assembly (30), which includes an oil injection ring (31). One side of multiple oil injection rings (31) is equipped with an oil distribution component (32). The oil distribution component (32) delivers oil to oil injection rings (31) at different positions via a float plate (34) mounted on the oil injection ring (31). The oil distribution component (32) includes an oil distribution pipe (321) fixed on an oil injection ring (31). A stepped seat (322) is fixed inside the oil distribution pipe (321). Two partition plates (323) are on the stepped seat (322). The inner cavity of the oil distribution pipe (321) is divided into a lower oil distribution chamber (324), a middle oil distribution chamber (325), and an upper oil distribution chamber (326) by the partition plates (323). The lower oil distribution chamber (324), the middle oil distribution chamber (325) and the upper oil distribution chamber (326) are respectively connected to three oil injection rings (31) through a conveying pipe (327). A guide pipe (328) is fixed at the top of the oil distribution pipe (321). One end of the guide pipe (328) that enters the oil distribution pipe (321) is attached to one side wall of the lower oil distribution chamber (324), and the other end of the guide pipe (328) is connected to one end of the guide pipe (21) that enters the oil tank (11). Two mounting slots are provided on the outer wall of the oil distribution pipe (321). A switch plate (329) is rotatably connected in each of the two mounting slots. A slide rod (3212) is slidably connected to the bottom of one side wall of each of the two mounting slots through a sliding groove. A push rod (3213) is fixed at one end of the slide rod (3212) that passes through the oil distribution pipe (321). A second spring (3214) is sleeved on the outer surface of the slide rod (3212). The two ends of the second spring (3214) are respectively connected to the push rod (3213) and one side wall of the oil distribution pipe (321).

2. The high-efficiency oil-immersed transformer with rapid venting as described in claim 1, characterized in that, Mounting holes are provided at the top and bottom of both sides of the mounting groove. A spherical column (3211) is connected to the mounting hole by a first spring (3210). Limiting holes that are adapted to the spherical column (3211) are provided at the top and bottom of both sides of the switch plate (329).

3. The high-efficiency oil-immersed transformer with rapid venting according to claim 1, characterized in that, Two retaining rods (33) are fixed on the oil injection ring (31) located above, and the float (34) is slidably installed on the retaining rods (33).

4. A high-efficiency oil-immersed transformer with rapid venting as described in claim 2, characterized in that, The inner wall of the oil guide pipe (21) and the outer wall of the spiral blade (22) are both fixed with bubble cones (24). The top of the outer wall of the oil distribution pipe (321) is provided with an exhaust groove, and the outlet end of the exhaust pipe (23) is provided with an exhaust one-way valve.

5. A high-efficiency oil-immersed transformer with rapid venting as described in claim 1, characterized in that, The transformer body (10) also includes an iron core (12) assembled in the oil tank (11), the iron core (12) is provided with windings, the top of the oil tank (11) is equipped with an insulating sleeve (13), the bottom of the oil tank (11) is equipped with an oil drain pipe, and the outer wall of the oil tank (11) is provided with heat sinks (14).

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