An oil-immersed transformer

Abstract

The application relates to the technical field of transformers, in particular to an oil-immersed transformer which comprises a transformer body, a heat dissipation mechanism arranged in the transformer body, a ventilation assembly and a swing assembly. The ventilation assembly comprises a gas supply element and a plurality of ventilation plates. The gas supply element is used for supplying gas into the ventilation plates. The ventilation plates are longitudinally spaced. One end of each ventilation plate penetrates the side wall of the transformer body and extends to the inside of the transformer body. The other end of each ventilation plate extends to the outside of the transformer body and communicates with the outside. The swing assembly comprises a plurality of swing plates and a driving structure. The swing plates are rotationally connected with the ventilation plates. The driving structure is used for driving the swing plates to swing relative to the ventilation plates. The swing amplitude can be adjusted according to the oil temperature in the transformer body. The cooling gas is supplied into the ventilation plates, and the swing plates are swung, so that the heat dissipation efficiency of the oil can be improved.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, and more specifically to an oil-immersed transformer. Background Technology

[0002] Oil-immersed transformers use oil as the primary insulation and as the cooling medium. In existing technology, oil-immersed transformers are submerged in oil within a tank. To achieve timely heat dissipation, cooling fins are typically installed on the sidewalls of the tank, with one end extending into the oil to transfer heat to the external environment. However, this cooling method is relatively simple and results in ineffective heat dissipation.

[0003] Patent document CN115206640B discloses an oil-immersed transformer with an air-cooling device, including an oil tank, a ventilation assembly, a vibration heat-conducting assembly, a heat sink, and a sealing assembly. One end of the heat sink penetrates the side wall of the oil tank and extends into the interior of the oil tank, while the other end extends to the exterior of the oil tank. The sealing assembly is installed on the inner wall of the oil tank to achieve a seal between the heat sink and the oil tank. The ventilation assembly is installed on the outer wall of the oil tank to deliver outside air into the oil tank. One end of the vibration heat-conducting assembly is connected to the output end of the ventilation assembly, and the other end is connected to the heat sink. When the oil temperature inside the oil tank is low and air cooling is not required... During heat dissipation, one end of the heat sink extends into the oil tank, thus preventing the heat sink from being constantly exposed to the outside of the oil tank and protecting it. When the temperature of the oil inside the oil tank rises, the ventilation component delivers outside air into the oil tank, thereby driving the heat sink to move out of the oil tank to conduct the heat in the oil inside the tank to the external environment, achieving heat dissipation. When outside air enters the oil tank, it also drives the vibration heat conduction component to vibrate in the oil inside the oil tank, thereby agitating the oil and improving the contact effect between the oil and the heat sink, thus improving the conduction effect of the oil and improving the heat dissipation effect of the oil.

[0004] However, when the above-mentioned transformer is in use, the heat sink plate will repeatedly expand and contract inside and outside the transformer, which can easily bring dust into the transformer and contaminate the oil. In addition, the heat conduction ball only vibrates locally, so the temperature of the oil near the heat-generating area is still uneven with the surrounding oil, which affects the cooling effect of the oil. Furthermore, after a long period of use, dust will accumulate on the heat sink plate, causing the heat dissipation effect of the heat sink plate to decrease. Summary of the Invention

[0005] This invention provides an oil-immersed transformer, aiming to solve the problems in related technologies where, during use, the heat sink repeatedly expands and contracts inside and outside the transformer, easily bringing dust into the transformer and contaminating the oil. In addition, the heat-conducting sphere only vibrates locally, resulting in uneven temperature distribution between the oil near the heating area and the surrounding oil, affecting the cooling effect. Furthermore, dust accumulates on the heat sink after prolonged use, causing a decrease in the heat dissipation effect of the heat sink.

[0006] The present invention provides an oil-immersed transformer, including a transformer body, a plurality of evenly distributed heat sinks connected to the outer end of the transformer body, each heat sink communicating with the interior of the transformer body, and a heat dissipation mechanism disposed within the transformer body, the heat dissipation mechanism including a ventilation component and a swing component.

[0007] The ventilation assembly includes an air supply component and multiple ventilation plates. The air supply component is used to introduce gas into the multiple ventilation plates. The multiple ventilation plates are arranged longitudinally at intervals. One end of each ventilation plate penetrates the side wall of the transformer body and extends into the interior of the transformer body, while the other end extends to the exterior of the transformer body and communicates with the outside. After the gas enters the ventilation plate, it can be discharged from the end of the ventilation plate located on the outside of the transformer body.

[0008] The swing assembly includes multiple swing plates and a drive structure. The swing plates are rotatably connected to the ventilation plate. The drive structure is used to drive the swing plates to swing relative to the ventilation plate, and the swing amplitude can be adjusted according to the oil temperature inside the transformer body.

[0009] Its effects are as follows: After cooling gas is continuously introduced into the ventilation plate through the air supply component, the cold airflow passes through the internal channels of the ventilation plate and fully exchanges heat with the high-temperature oil inside the transformer body, thereby effectively reducing the oil temperature inside the transformer body and significantly improving the overall heat dissipation efficiency. In addition, by driving the swing plate to periodically swing relative to the ventilation plate through the drive structure, it not only agitates the oil inside the transformer body and promotes oil flow, but also enables the high-temperature oil near the heat source to be rapidly replaced with the low-temperature oil far away from the heat source, enhancing the thermal convection between the oils, and further increasing the contact frequency and contact area between the high-temperature oil and the surface of the ventilation plate, thereby greatly improving the heat dissipation efficiency and ensuring the temperature stability and reliability of the transformer under continuous high load operation.

[0010] Preferably, one end of the ventilation plate extending to the outside of the transformer body is located between two adjacent heat sinks. The ventilation assembly also includes multiple flip plates, which are respectively arranged corresponding to the multiple ventilation plates and located on the side of the ventilation plate away from the transformer body. The interior of each flip plate is connected to the corresponding ventilation plate, and multiple ventilation openings are provided on the side of each flip plate.

[0011] Its effect is that gas can enter the flip plate and be discharged outward from the vents on the flip plate. The discharged gas can blow towards the heat sinks on both sides to clean and cool the heat sinks.

[0012] Preferably, the flip plate includes a fixed section and a telescopic section. The telescopic section extends and retracts horizontally along the fixed section. An elastic telescopic member is provided between the fixed section and the telescopic section. The two ends of the elastic telescopic member are respectively provided on the fixed section and the telescopic section. The elastic telescopic member is initially at its original length. When the flip plate rotates, it can abut against the adjacent heat sink.

[0013] The effect is that by adding a cleaning structure to the telescopic section, the flip plate can physically scrape and clean the surface of the heat sink while in contact with it. This dual cleaning method, combining airflow purging and mechanical cleaning, can more thoroughly remove stubborn dust and oil that are difficult to remove by airflow alone, ensuring that the heat sink always maintains optimal heat dissipation efficiency, thereby further improving the overall heat dissipation performance and long-term operational reliability of the transformer.

[0014] Preferably, the air supply component includes a fan and a ventilation duct. The fan is located on the outside of the transformer body, one end of the ventilation duct is connected to the output end of the fan, and the other end extends into the interior of the transformer body and communicates with multiple ventilation plates.

[0015] Preferably, the drive structure includes an impeller, a rotor, and a rod. A shaft is connected to the swing plate, and the swing plate is rotatably connected to the corresponding ventilation plate through the shaft. The impeller is rotatably located inside the ventilation plate, and the rotor is rotatably located outside the ventilation plate and fixedly connected to the impeller. The rod is located between the swing plate and the rotor, and one end of the rod is hinged to the lower end of the swing plate, and the other end is eccentrically connected to the rotor through the shaft.

[0016] Preferably, the rod is an elastic telescopic structure, and the inside of the rod is filled with transformer oil, so that the length of the rod can be adjusted according to the temperature of the transformer oil inside the rod.

[0017] Its effect is that when the temperature of the oil inside the transformer changes, the length of the rod changes, which in turn increases the swing amplitude of the swing plate, further improving the heat dissipation effect.

[0018] Preferably, the end of the flip plate facing the ventilation plate is connected to a mounting post, and the end of the ventilation plate located on the outside of the transformer body is provided with a mounting port to accommodate the mounting post, so that the flip plate is rotatably connected to the ventilation plate through the mounting post. The ventilation assembly also includes a second drive structure, which is used to drive the flip plate to swing relative to the ventilation plate.

[0019] Its effect is that the second drive structure can drive the flip plate to swing, so that the exhaust air is blown to different positions on the heat sink, improving the cleaning and cooling effect of the heat sink.

[0020] Preferably, the drive structure two includes a rotating wheel two, a connecting rod one, and a connecting rod two. The rotating wheel two is located inside the ventilation plate and is fixedly connected to the shaft one. There are two connecting rods one, and the same end of the two connecting rods one is hinged to the rotating wheel two. The two hinge points are symmetrical about any diameter of the rotating wheel two. There are two connecting rods two, and they are respectively connected to the two connecting rods one. A universal joint is connected between the other end of the connecting rod one and the end of the corresponding connecting rod two. Two shafts three are provided on the arc-shaped surface of the mounting column, and the two shafts three are located on both sides of the flip plate. The other ends of the two connecting rods two are respectively hinged to the two shafts three.

[0021] Preferably, multiple swing plates are installed at different heights within the transformer body.

[0022] Its effect is to agitate the oil at different heights within the transformer body, further improve the exchange effect between high-temperature and low-temperature oil, and thus improve the heat dissipation effect of the transformer oil.

[0023] Preferably, a seal is provided between each ventilation plate and the side wall of the transformer body.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. The present invention is equipped with a ventilation component. After cooling gas is introduced into the ventilation plate through the air supply component, the gas will exchange heat with the high-temperature oil in the transformer body, thereby reducing the oil temperature inside the transformer body and improving the heat dissipation efficiency and effect.

[0026] 2. The present invention is provided with a swinging component, which drives the swinging plate to swing relative to the ventilation plate through a driving structure, thereby agitating the oil in the transformer body and causing the oil near the heat source to exchange positions with the oil far away from the heat source, improving the contact effect between the high-temperature oil and the ventilation plate, thereby improving the heat dissipation effect.

[0027] 3. The present invention is provided with a flip plate, which allows the gas introduced into the ventilation plate to enter the flip plate and be discharged outward from the ventilation port provided on the flip plate. The discharged gas can blow towards the heat sinks on both sides to clean and cool the heat sinks. At the same time, the flip plate can swing under the action of the second drive structure to improve the cleaning and cooling effect of the heat sinks.

[0028] 4. By adding cleaning structures such as brushes and scrapers to the expansion joint, the flip plate can simultaneously perform physical scraping and cleaning on the surface of the heat sink during its elastic contact with the heat sink. This dual cleaning method of "airflow blowing + mechanical cleaning" can more thoroughly remove stubborn dust and oil stains that are difficult to remove by airflow alone, ensuring that the heat sink always maintains the best heat dissipation efficiency, and further improving the overall heat dissipation performance and long-term operational reliability of the transformer. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0030] Figure 2 This is a schematic diagram of the heat dissipation mechanism of the present invention.

[0031] Figure 3 This is a side view of the overall structure of the present invention.

[0032] Figure 4 This is a schematic diagram of the installation of the heat dissipation structure and the transformer body of the present invention.

[0033] Figure 5 This is a schematic diagram of the flip plate structure of the present invention.

[0034] Figure 6 This is a schematic diagram of the second driving structure of the present invention.

[0035] Figure 7 This is a schematic diagram of the internal structure of the ventilation plate of the present invention.

[0036] Figure 8 This is a schematic diagram of the flip plate structure of the present invention.

[0037] Figure 9 This is a schematic diagram of the flip-plate telescopic structure of the present invention.

[0038] Figure label:

[0039] 1. Transformer body; 11. Heat sink; 21. Ventilation plate; 22. Ventilation pipe; 23. Flip plate; 231. Ventilation opening; 232. Mounting column; 233. Fixed section; 234. Telescopic section; 235. Elastic telescopic component; 31. Swing plate; 311. Shaft one; 32. Impeller; 33. Rotor one; 34. Rod; 41. Rotor two; 42. Connecting rod one; 43. Connecting rod two; 44. Universal joint; 45. Shaft three. Detailed Implementation

[0040] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0041] like Figures 1 to 9 As shown, an oil-immersed transformer of the present invention includes a transformer body 1 and a heat dissipation mechanism disposed within the transformer body 1 for dissipating heat from the transformer body 1. The heat dissipation mechanism includes a ventilation component and a swing component.

[0042] The transformer body 1 is filled with transformer oil for insulation and cooling. Multiple evenly distributed heat sinks 11 are connected to the outer end of the transformer body 1. Each heat sink 11 is connected to the interior of the transformer body 1. When the transformer body 1 is running, the internal windings and iron core and other components generate heat. This heat is transferred to the surrounding transformer oil through heat conduction. The heated transformer oil generates buoyancy due to density change, forming natural convection, which causes the hot oil to rise to the top of the transformer body 1 and then flow into the heat sink 11. In the heat sink 11, the hot oil dissipates heat into the surrounding air through the outer surface of the heat sink 11, which lowers the oil temperature. After cooling, the oil increases in density and flows back to the lower part of the transformer body 1 under the action of gravity, and recirculates to the heating elements, forming a closed natural convection cycle.

[0043] like Figures 1 to 3 As shown, the ventilation assembly includes an air supply component and multiple ventilation plates 21. The air supply component is used to introduce gas into the multiple ventilation plates 21. The multiple ventilation plates 21 are arranged longitudinally at intervals. One end of each ventilation plate 21 penetrates the side wall of the transformer body 1 and extends into the interior of the transformer body 1, while the other end extends to the exterior of the transformer body 1 and communicates with the outside. Each ventilation plate 21 is provided with a sealing element between itself and the side wall of the transformer body 1. After the gas enters the ventilation plate 21, it can be discharged from the end of the ventilation plate 21 located on the outside of the transformer body 1.

[0044] Specifically, when the oil temperature inside the transformer body 1 is low and no additional heat dissipation is required, the air supply component stops ventilating into the ventilation plates 21. At this time, the transformer body 1 can dissipate heat through the external heat sink 11. When the oil temperature inside the transformer body 1 rises and additional heat dissipation is required, cooling gas is introduced into multiple ventilation plates 21 through the air supply component. After entering the ventilation plates 21, the gas can exchange heat with the oil inside the transformer body 1, lowering the oil temperature. The heated gas is then discharged from the end of the ventilation plate 21 located outside the transformer body 1. By continuously introducing cooling gas into the ventilation plates 21, the oil inside the transformer body 1 can be effectively cooled. Combined with the heat sink 11, this achieves dual heat dissipation of the transformer oil, resulting in a good heat dissipation effect.

[0045] like Figures 2 to 6 As shown, the swing assembly includes multiple swing plates 31 and a drive structure 1. The swing plates 31 are rotatably connected to the ventilation plate 21. The drive structure 1 is used to drive the swing plates 31 to swing relative to the ventilation plate 21, and the swing amplitude can be adjusted according to the oil temperature in the transformer body 1.

[0046] Specifically, when the oil temperature inside the transformer body 1 is low and no additional heat dissipation is required, the swing plate 31 and the ventilation plate 21 remain relatively fixed. When the oil temperature inside the transformer body 1 rises and additional heat dissipation is required, the swing plate 31 is driven by the drive structure to swing relative to the ventilation plate 21, agitating the oil inside the transformer body 1. This causes the oil near the heat source to exchange positions with the oil away from the heat source, thereby pushing the high-temperature oil near the heat source to the ventilation plate 21, improving the contact effect between the high-temperature oil and the ventilation plate 21, and thus effectively dissipating heat from this part of the high-temperature oil, improving the heat dissipation effect. In addition, the swing amplitude of the swing plate 31 can be adjusted according to the oil temperature inside the transformer body 1. That is, the higher the oil temperature inside the transformer body 1, the greater the swing amplitude of the swing plate 31, thereby further agitating the oil inside the transformer body 1 and improving the heat dissipation efficiency of the oil.

[0047] like Figures 1 to 6 As shown, in some embodiments, one end of the ventilation plate 21 extending to the outside of the transformer body 1 is located between two adjacent heat sinks 11. The ventilation assembly also includes multiple flip plates 23, which are respectively arranged corresponding to the multiple ventilation plates 21 and located on the side of the ventilation plate 21 away from the transformer body 1. The interior of each flip plate 23 is connected to the corresponding ventilation plate 21, and multiple ventilation openings 231 are provided on the side of each flip plate 23.

[0048] Specifically, cooling gas is introduced into the ventilation plate 21 through the air supply component. After the cooling gas exchanges heat with the high-temperature oil in the transformer body 1, the heated gas will be discharged from the end of the ventilation plate 21 located outside the transformer body 1 and enter the flip plate 23. Then, it will be discharged outward from the ventilation port 231 provided on the flip plate 23. Since the end of the ventilation plate 21 extending to the outside of the transformer body 1 is located between two adjacent heat sinks 11, when the gas is discharged outward from the ventilation port 231, the gas can blow towards the heat sinks 11 on both sides, blowing away the dust attached to the surface of the heat sinks 11, keeping the heat sinks 11 clean, and avoiding the presence of dust affecting the heat dissipation effect of the heat sinks 11. In addition, the gas blowing towards the heat sinks 11 can have a certain cooling effect on the heat sinks 11, which is beneficial to cooling the high-temperature oil that enters the heat sinks 11.

[0049] like Figures 4 to 9 As shown, in some embodiments, each flip plate 23 includes a fixed section 233 and a telescopic section 234. The fixed section 233 is the main body of the flip plate 23, while the telescopic section 234 is located on the side away from the transformer body 1 and can reciprocate horizontally along the guide rail or sleeve structure of the fixed section 233.

[0050] An elastic telescopic member 235, such as one or more compression springs, is provided between the fixed section 233 and the telescopic section 234. The two ends of the elastic telescopic member 235 are respectively connected to the side wall of the fixed section 233 and the side wall of the telescopic section 234. The elastic telescopic member 235 is disposed on the upper and lower side walls of the fixed section 233 and the telescopic section 234. In its natural state, the elastic telescopic member 235 is at its original length, and its elastic force pushes the telescopic section 234 outward, so that the entire flip plate 23 maintains its preset maximum width.

[0051] When the drive structure 2 drives the tilting plate 23 to swing, the outer side of its telescopic section 234 will come into contact with the adjacent heat sink 11. At this time, due to the obstruction of the heat sink 11, the telescopic section 234 will be subjected to pressure and contract inward, thereby compressing the elastic telescopic member 235.

[0052] Furthermore, to enhance the cleaning effect, a cleaning structure can be provided on the outer surface of the telescopic section 234 that contacts the heat sink 11. For example, a scraper made of a wear-resistant elastic material (such as polyurethane) can be fixedly connected, or a row of wear-resistant brushes with a certain hardness can be embedded. In this way, when the flip plate 23 swings, its telescopic section 234 makes flexible contact with the surface of the heat sink 11 under the action of the elastic telescopic member 235. The scraper or brush attached thereto will then perform a reciprocating scraping or sweeping of the surface of the heat sink 11, which can effectively peel off and remove stubborn dust and oil stains that are difficult to blow away by airflow alone. The reciprocating swing of the flip plate 23 to both sides can effectively clean the heat sink 11 on both sides, keeping the heat sink 11 in a good heat dissipation state.

[0053] like Figures 4 to 7 As shown, in some embodiments, the air supply component includes a fan and a ventilation duct 22. The fan is located on the outside of the transformer body 1. One end of the ventilation duct 22 is connected to the output end of the fan, and the other end extends into the interior of the transformer body 1 and communicates with multiple ventilation plates 21.

[0054] Specifically, when the oil temperature inside the transformer body 1 is low and no additional heat dissipation is required, the fan is off, and no cooling gas is introduced into the ventilation plates 21. When the oil temperature inside the transformer body 1 rises, the fan is activated, and external cooling gas is transported to the ventilation pipe 22, then to the multiple ventilation plates 21, then into the tilting plate 23, and finally discharged from the ventilation opening 231 on the tilting plate 23. During this process, the cooling gas can exchange heat with the high-temperature oil inside the transformer body 1, achieving efficient cooling of the transformer oil, reducing the oil temperature inside the transformer body 1, and improving heat dissipation efficiency and effect.

[0055] like Figures 2 to 9As shown, in some embodiments, the drive structure includes an impeller 32, a rotor 33, and a rod 34. A shaft 311 is connected to the swing plate 31, and the swing plate 31 is rotatably connected to the corresponding ventilation plate 21 via the shaft 311. The impeller 32 is rotatably disposed within the ventilation plate 21, and the rotor 33 is rotatably disposed outside the ventilation plate 21 and fixedly connected to the impeller 32. The rod 34 is disposed between the swing plate 31 and the rotor 33, with one end of the rod 34 hinged to the swing plate 31 and the other end eccentrically connected to the rotor 33 via the shaft 34.

[0056] Specifically, when the fan is started and gas is introduced into the ventilation plate 21, the impeller 32 will rotate under the influence of the airflow, driving the connected rotor 33 to rotate as well. When the rotor 33 rotates, the rotation of the rotor 33 can be converted into the reciprocating motion of the rod 34 through the eccentric connection between the rod 34 and the rotor 33. Then, through the hinge between the rod 34 and the swing plate 31, the reciprocating motion of the rod 34 is converted into the swinging motion of the swing plate 31, causing the swing plate 31 to swing relative to the ventilation plate 21, agitating the oil in the transformer body 1 and improving the heat dissipation effect.

[0057] like Figures 5 to 9 As shown, in some embodiments, the rod 34 is an elastic telescopic structure, and the inside of the rod 34 is filled with transformer oil, so that the length of the rod 34 can be adjusted according to the temperature of the transformer oil inside the rod 34.

[0058] Specifically, when the oil temperature inside the transformer body 1 is low and no additional heat dissipation is required, the rod 34 maintains its initial length under its own elastic force. When the oil temperature inside the transformer body 1 rises, the transformer oil inside the rod 34 is affected by the oil temperature inside the transformer body 1, causing the temperature of the transformer oil inside the rod 34 to rise. According to the principle of thermal expansion and contraction, the spacing between the transformer oil molecules inside the rod 34 increases, resulting in an increase in volume and thus elongating the rod 34. At this time, the swing plate 31 is driven by the drive structure to swing relative to the ventilation plate 21. Due to the increase in the length of the rod 34, the swing amplitude of the swing plate 31 increases, further improving the agitation effect on the oil inside the transformer body 1. Therefore, the length of the rod 34 can be adjusted according to the oil temperature inside the transformer body 1, that is, the swing amplitude of the swing plate 31 can be adjusted according to the oil temperature inside the transformer body 1, so that the higher the oil temperature, the greater the swing amplitude.

[0059] like Figures 4 to 9As shown, in some embodiments, the end of the flip plate 23 facing the ventilation plate 21 is connected to a mounting post 232, and the end of the ventilation plate 21 located outside the transformer body 1 is provided with a mounting opening for accommodating the mounting post 232, so that the flip plate 23 can be rotatably connected to the ventilation plate 21 through the mounting post 232. The ventilation assembly also includes a second drive structure, which is used to drive the flip plate 23 to swing relative to the ventilation plate 21.

[0060] Specifically, cooling gas is introduced into the ventilation plate 21 through the air supply component. The gas exchanges heat with the high-temperature oil inside the transformer body 1, then enters the tilting plate 23 and is discharged outward from the ventilation port 231 on the tilting plate 23, cleaning and cooling the heat sink 11. During this process, the tilting plate 23 is driven by the second drive structure to swing relative to the ventilation plate 21, which changes the position of the ventilation port 231, allowing the discharged gas to be blown to different positions on the heat sink 11, improving the cleaning and cooling effect of the heat sink 11.

[0061] like Figures 5 to 9 As shown, in some embodiments, the second drive structure includes a second wheel 41, a first connecting rod 42, and a second connecting rod 43. The second wheel 41 is disposed inside the ventilation plate 21 and is fixedly connected to a first shaft 311. There are two first connecting rods 42, and the same end of both first connecting rods 42 is hinged to the second wheel 41, and the two hinge points are symmetrical about any diameter of the second wheel 41. There are two second connecting rods 43, which are respectively connected to the two first connecting rods 42, and a universal joint 44 is connected between the other end of the first connecting rod 42 and the end of the corresponding second connecting rod 43. Two third shafts 45 are provided on the arc-shaped surface of the mounting column 232, and the two third shafts 45 are respectively located on both sides of the flip plate 23, and the other ends of the two second connecting rods 43 are respectively hinged to the two third shafts 45.

[0062] Specifically, when the swing plate 31 is driven to swing by the drive structure, it will cause the shaft 311 to rotate relative to the ventilation plate 21, and drive the rotating wheel 41 to rotate. When the rotating wheel 41 rotates, the rotation of the rotating wheel 41 can be converted into the reciprocating motion of the connecting rod 42 through the hinge between the rotating wheel 41 and the connecting rod 42. The two connecting rods 42 move in opposite directions. That is, when the other end of one connecting rod 42 moves closer to the axis of the rotating wheel 41, the other end of the other connecting rod 42 moves away from the axis of the rotating wheel 41. The universal joint 44 can adapt to the change of the angle of the connecting rod 42 and transmit the motion of the connecting rod 42 to the connecting rod 43, so that the two connecting rods 43 reciprocate in opposite directions. At this time, through the hinge between the connecting rod 43 and the mounting post 232, the mounting post 232 will reciprocate around its own axis, thereby driving the flip plate 23 to swing back and forth, improving the cleaning and heat dissipation effect of the heat sink 11.

[0063] like Figures 2 to 5 As shown, multiple swing plates 31 are installed at different heights inside the transformer body 1, so that when the swing plates 31 swing under the action of the drive structure, they can agitate the oil at different heights inside the transformer body 1, further improving the exchange effect between high-temperature oil and low-temperature oil, and thus improving the heat dissipation effect of the transformer oil.

[0064] Working principle: When the temperature of the oil inside the transformer body 1 is low and no additional heat dissipation is required, the transformer body 1 can dissipate heat through the external heat sink 11.

[0065] When the internal oil temperature of the transformer body 1 rises due to high load operation, the cooling mechanism is activated. The air supply unit starts working, pumping external cooling air into multiple ventilation plates 21 that penetrate the transformer body 1, where it efficiently exchanges heat with the surrounding high-temperature oil, directly reducing the oil temperature.

[0066] During cooling, the cooling airflow drives the impeller 32 inside the ventilation plate 21 to rotate, which in turn drives the swing plate 31 to oscillate back and forth via the drive structure. The movement of the swing plate 31 forcibly agitates the internal oil, greatly enhancing heat convection, and the swing amplitude can be adaptively adjusted by the extension and retraction of the rod 34 to achieve internal heat dissipation.

[0067] After internal heat exchange, the heated gas is discharged from the external port of the ventilation plate 21, enters the flip plate 23, and is blown towards the adjacent heat sink 11 through the vent 231 on its side. This airflow plays a preliminary role in cleaning and forcing the heat sink 11.

[0068] Meanwhile, the movement of the internal swing plate 31 synchronously drives the external flip plate 23 to reciprocate. During the swinging process, the telescopic section 234 of the flip plate 23 periodically contacts the surface of the heat sink 11. Upon contact, the cleaning structure provided on the telescopic section 234 physically scrapes the surface of the heat sink 11, effectively removing stubborn dust and oil stains, achieving deep cleaning.

[0069] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An oil-immersed transformer, comprising a transformer body, wherein a plurality of evenly distributed heat sinks are connected to the outer end of the transformer body, each heat sink communicating with the interior of the transformer body, characterized in that, It also includes a heat dissipation mechanism located inside the transformer body, which includes a ventilation component and a swing component; The ventilation assembly includes an air supply component and multiple ventilation plates. The air supply component is used to introduce gas into the multiple ventilation plates. The multiple ventilation plates are arranged longitudinally at intervals. One end of each ventilation plate penetrates the side wall of the transformer body and extends into the interior of the transformer body, while the other end extends to the exterior of the transformer body and communicates with the outside. After the gas enters the ventilation plate, it can be discharged from the end of the ventilation plate located on the outside of the transformer body. The swing assembly includes multiple swing plates and a drive structure. The swing plates are rotatably connected to the ventilation plate. The drive structure is used to drive the swing plates to swing relative to the ventilation plate, and the swing amplitude can be adjusted according to the oil temperature inside the transformer body. The ventilation plate extends to the outside of the transformer body at one end, which is located between two adjacent heat sinks. The ventilation assembly also includes multiple flip plates, which are respectively set to correspond to multiple ventilation plates and are located on the side of the ventilation plate away from the transformer body. The interior of each flip plate is connected to the corresponding ventilation plate, and multiple ventilation openings are provided on the side of each flip plate. The flip plate includes a fixed section and a telescopic section. The telescopic section extends and retracts horizontally along the fixed section. An elastic telescopic component is provided between the fixed section and the telescopic section. The two ends of the elastic telescopic component are respectively set on the fixed section and the telescopic section. The elastic telescopic component is initially at its original length. When the flip plate rotates, it can abut against the adjacent heat sink.

2. The oil-immersed transformer according to claim 1, characterized in that, The air supply unit includes a fan and a ventilation duct. The fan is located on the outside of the transformer body. One end of the ventilation duct is connected to the output end of the fan, and the other end extends into the interior of the transformer body and communicates with multiple ventilation plates.

3. The oil-immersed transformer according to claim 1, characterized in that, The drive structure includes an impeller, a rotor, and a rod. A shaft is connected to the swing plate, and the swing plate is rotatably connected to the corresponding ventilation plate through the shaft. The impeller is rotatably located inside the ventilation plate, and the rotor is rotatably located outside the ventilation plate and is fixedly connected to the impeller. The rod is located between the swing plate and the rotor, and one end of the rod is hinged to the lower end of the swing plate, while the other end is eccentrically connected to the rotor through the shaft.

4. An oil-immersed transformer according to claim 3, characterized in that, The rod is an elastic telescopic structure, and its interior is filled with transformer oil, allowing the length of the rod to be adjusted according to the temperature of the transformer oil inside.

5. An oil-immersed transformer according to claim 3, characterized in that, The end of the flip plate facing the ventilation plate is connected to a mounting post. The end of the ventilation plate located on the outside of the transformer body is provided with a mounting port to accommodate the mounting post, so that the flip plate is rotatably connected to the ventilation plate through the mounting post. The ventilation assembly also includes a second drive structure, which is used to drive the flip plate to swing relative to the ventilation plate.

6. An oil-immersed transformer according to claim 5, characterized in that, The second drive structure includes a second rotating wheel, a first connecting rod, and a second connecting rod. The second rotating wheel is located inside the ventilation plate and is fixedly connected to the first shaft. There are two first connecting rods, and the same end of the two first connecting rods is hinged to the second rotating wheel. The two hinge points are symmetrical about any diameter of the second rotating wheel. There are two second connecting rods, which are respectively connected to the two first connecting rods. A universal joint connects the other end of the first connecting rod to the end of the corresponding second connecting rod. Two third shafts are provided on the arc-shaped surface of the mounting column, and the two third shafts are located on both sides of the flip plate. The other ends of the two second connecting rods are respectively hinged to the two third shafts.

7. An oil-immersed transformer according to claim 1, characterized in that, Multiple swing plates are installed at different heights within the transformer body.

8. An oil-immersed transformer according to claim 1, characterized in that, Each ventilation plate is fitted with a seal between itself and the side wall of the transformer body.

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