Oil immersed transformer

Abstract

The invention discloses an oil immersed transformer and relates to the field of transformers, the oil immersed transformer comprises a transformer body, fins are installed on the transformer body, heat dissipation channels are formed in the tops and the bottoms of the fins in a penetrating mode, a support is installed on the transformer body, and a first rotating shaft is rotationally connected to the support; a plate body is fixedly connected to the first rotating shaft, an overturning assembly is installed on the first rotating shaft, a rigid connecting piece is connected into the support in a sliding mode, and one end of the rigid connecting piece is connected with the overturning assembly. When the gravity of the collecting box is increased due to rainwater, the collecting box can drive a rigid connecting piece and a sliding rod to move downwards, at the moment, the sliding rod compresses an elastic piece, the rigid connecting piece synchronously drives a rack to move downwards, the rack drives a gear to rotate, and the gear drives a first rotating shaft to rotate; and the first rotating shaft drives the plate body to rotate by means of the connecting plate and actively shields the transformer body from rain, so that the probability that rainwater enters the transformer body is reduced, and the service life is prolonged.

Description

Technical Field

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

[0002] Oil-immersed transformers are indispensable key equipment in power systems and are widely used in power transmission and distribution networks. The insulating oil filling them not only provides insulation and cooling functions, but also extinguishes arcs and protects solid insulation materials.

[0003] However, outdoor-installed oil-immersed transformers are exposed to the natural environment for extended periods, facing the risk of rainwater intrusion. Rainwater entering the transformer can lead to a series of serious problems, including decreased insulation performance, accelerated material aging, and discharge faults, directly impacting the transformer's safe operation and lifespan. Currently, the industry primarily addresses this issue through regular maintenance and monitoring, but proactive preventative measures are lacking. Summary of the Invention

[0004] To address the risk of rainwater intrusion faced by outdoor-installed oil-immersed transformers exposed to the natural environment for extended periods, this application provides an oil-immersed transformer.

[0005] The oil-immersed transformer provided in this application adopts the following technical solution:

[0006] The system includes a transformer body with fins. Heat dissipation channels are formed through the top and bottom of the fins. A bracket is mounted on the transformer body, and a first rotating shaft is rotatably connected to the bracket. A plate is fixedly connected to the first rotating shaft, and a flipping assembly is mounted on the first rotating shaft. A rigid connector is slidably connected inside the bracket, with one end of the rigid connector connected to the flipping assembly. A collection assembly is mounted on the transformer body, with the other end of the rigid connector connected to the collection assembly. The collection assembly collects rainwater and uses the gravity of the rainwater to move downwards, thereby pulling the rigid connector downwards. When the rigid connector moves downwards, the flipping assembly drives the first rotating shaft to rotate. A sealing assembly is mounted on the transformer body. When the collection assembly moves downwards, the collection assembly drives the sealing assembly to move upwards and seal the bottom of the heat dissipation channels.

[0007] By adopting the above technical solutions, the heat dissipation channel increases the heat dissipation area and improves the heat dissipation effect; the collection component collects rainwater and moves downward, pulling the rigid connecting piece, causing the flipping component to drive the first rotating shaft to rotate, which in turn drives the plate to rotate and actively block rain from the transformer body, reducing the probability of rainwater entering the interior and improving service life; the downward movement of the collection component can also drive the sealing component to move upward and seal the bottom of the heat dissipation channel, so that rainwater gathers in the heat dissipation channel and further increases the heat dissipation effect.

[0008] Optionally, a connecting plate is fixedly connected to the plate body, and the connecting plate is fixedly connected to the first rotating shaft, thereby realizing a fixed connection between the first rotating shaft and the plate body.

[0009] By adopting the above technical solution, the connecting plate achieves a fixed connection between the first rotating shaft and the plate body, allowing the plate body to rotate with the first rotating shaft to protect the transformer body from rain.

[0010] Optionally, the bracket has a slide rail inside and a sliding opening on its surface. The slide rail and the sliding opening are connected, and the rigid connector is slidably disposed in the slide rail and the sliding opening, thereby realizing a sliding connection between the bracket and the rigid connector.

[0011] By adopting the above technical solution, a slide rail and a sliding port are opened and connected inside the bracket, allowing the rigid connector to slide within them, thus realizing the sliding connection between the bracket and the rigid connector and improving the lifting stability of the rigid connector.

[0012] Optionally, the flipping component includes:

[0013] The gear is fixedly connected to the first rotating shaft;

[0014] A rack is fixedly connected to one end of the rigid connector, and the gear meshes with the rack.

[0015] By adopting the above technical solution, and utilizing the structure in which the gear is fixedly connected to the first rotating shaft and the rack is fixedly connected to one end of the rigid connecting member and the two mesh with each other, the first rotating shaft can be effectively driven to rotate when the rigid connecting member moves down, thereby driving the plate to rotate and achieve active rain protection.

[0016] Optionally, a limiting plate is installed on the rack to prevent the rack from disengaging from the gear.

[0017] By adopting the above technical solution, the limiting plate can prevent the rack from disengaging from the gear, increase the stability of the device, and limit the range of movement of the rack.

[0018] Optionally, the collection component includes:

[0019] A fixing plate is mounted on the transformer body, and a sliding groove is provided on the fixing plate;

[0020] An elastic element, wherein the elastic element is disposed within the groove;

[0021] A sliding rod, which is slidably disposed within the sliding groove;

[0022] A collection box is mounted on a sliding rod, and the other end of the rigid connector is mounted on the collection box. The collection box is used to collect rainwater. When the weight of the collection box increases due to rainwater, the collection box can drive the rigid connector and the sliding rod to move downward. At this time, the sliding rod compresses the elastic element.

[0023] By adopting the above technical solution, the increased gravity of the collection box after collecting rainwater causes the rigid connecting parts and sliding rods to move down and compress the elastic parts, providing power for the subsequent rotation of the drive plate to block rain and for the sealing of the bottom of the heat dissipation channel of the enclosed component.

[0024] Optionally, the collection box is provided with a drainage hole for draining rainwater from inside the collection box. The drainage speed of the drainage hole is less than the speed at which the collection box collects rainwater.

[0025] By adopting the above technical solution, the collection box has a drainage hole to drain the internal rainwater, and the drainage speed is less than the collection speed. This ensures that the collection box will move the rigid connecting parts downward due to the increased gravity of the rainwater, so as to realize the rotation of the plate to block the rain and the sealing of the bottom of the heat dissipation channel by the sealing component.

[0026] Optionally, the collection box has an inclined surface with a highest point and a lowest point, and the drain hole is located at the lowest point of the inclined surface.

[0027] By adopting the above technical solution, by creating an inclined surface inside the collection box and setting the drain hole at the lowest point, the water in the collection box can be drained to a large extent, preventing residual water.

[0028] Optionally, a flow guide is installed on the transformer body, and a flow guide groove is opened inside the flow guide. The flow guide groove has a high end and a low end. The low end of the flow guide groove is located at the top of the collection box, thereby increasing the speed at which the collection box collects rainwater and making the drainage speed of the drainage hole less than the speed at which the collection box collects rainwater.

[0029] By adopting the above technical solution, a guide component with a guide groove is installed on the transformer body, and the lower end of the guide groove is set at the top of the collection box. This can increase the speed at which the collection box collects rainwater, making the drainage speed of the drain hole less than the collection speed, thus ensuring the normal operation of the device.

[0030] Optionally, the enclosure component includes:

[0031] A fixing rod is installed on the transformer body;

[0032] The second rotating shaft is rotatably connected to the fixed rod;

[0033] A rotating rod, which is fixedly connected to the second rotating shaft;

[0034] A connecting rod, one end of which is rotatably connected to the collection box, and the other end of which is rotatably connected to one end of the rotating rod;

[0035] Guide rod, which is mounted on the transformer body;

[0036] A sealing plate is slidably connected to the guide rod and is disposed at the bottom of the heat dissipation channel of the fins. A drain outlet is provided on the sealing plate and is connected to the heat dissipation channel.

[0037] A connecting rod is fixedly connected to the sealing plate, and the other end of the connecting rod is rotatably connected to the rotating rod.

[0038] By adopting the above technical solution, when the collection box moves down, the connecting rod, rotating rod and connecting rod can drive the sealing plate to move up and close the bottom of the heat dissipation channel, so that the rainwater can be collected in the heat dissipation channel for full heat exchange and increase the heat dissipation effect. At the same time, the drain outlet discharges the rainwater after absorbing heat to ensure subsequent heat dissipation. After the rainwater in the collection box is discharged, it moves up and the sealing plate moves down to release the water accumulated in the heat dissipation channel.

[0039] In summary, this application includes at least one of the following beneficial technical effects:

[0040] When the weight of the collection box increases due to rainwater, the collection box can drive the rigid connecting parts and the sliding rod to move down. At this time, the sliding rod compresses the elastic parts. Simultaneously, the rigid connecting parts drive the rack to move down, the rack drives the gear to rotate, the gear drives the first rotating shaft to rotate, and the first rotating shaft drives the plate to rotate with the help of the connecting plate, thus actively blocking rainwater from entering the transformer body, reducing the probability of rainwater entering the interior and improving the service life. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application;

[0043] Figure 2 This is a schematic diagram of the fin structure of Embodiment 1 of this application;

[0044] Figure 3 This is a schematic diagram of the support plate structure according to Embodiment 1 of this application;

[0045] Figure 4 This is a schematic diagram of the flip component structure according to Embodiment 1 of this application;

[0046] Figure 5 This is a schematic diagram of the collection component structure according to Embodiment 1 of this application;

[0047] Figure 6 This is a schematic diagram of the flow guide structure according to Embodiment 1 of this application;

[0048] Figure 7 This is a schematic diagram of the closed component structure of Embodiment 2 of this application.

[0049] Reference numerals: 1. Transformer body; 2. Fin; 21. Heat dissipation channel; 3. Support; 31. First rotating shaft; 32. Slide rail; 33. Sliding port; 4. Plate; 41. Connecting plate; 5. Tilting assembly; 51. Gear; 52. Rack; 53. Limiting plate; 6. Rigid connecting component; 7. Collection assembly; 71. Fixing plate; 711. Slide groove; 72. Elastic component; 73. Slide rod; 74. Collection box; 741. Drain hole; 742. Inclined surface; 75. Flow guide; 751. Flow guide groove; 8. Sealing assembly; 81. Fixing rod; 82. Second rotating shaft; 83. Rotating rod; 84. Connecting rod; 85. Guide rod; 86. Sealing plate; 861. Drain port; 87. Connecting rod. Detailed Implementation

[0050] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail.

[0051] This application discloses an oil-immersed transformer.

[0052] Example 1:

[0053] Reference Figure 1 The oil-immersed transformer includes a transformer body 1, fins 2, a support 3, a first rotating shaft 31, a plate 4, a tilting assembly 5, a rigid connector 6, and a collection assembly 7. In rainy weather, the collection assembly 7 collects rainwater, which then moves downwards under gravity. The collection assembly 7 pulls the rigid connector 6 downwards simultaneously, while the rigid connector 6 drives the tilting assembly 5 to rotate the first rotating shaft 31. The first rotating shaft 31 then rotates the plate 4, actively protecting the transformer body 1 from rain, reducing the probability of rainwater entering the interior and improving its service life.

[0054] like Figure 1 As shown, the transformer body 1 is a conventional design of oil-immersed transformer; several rectangular fins 2 are fixedly installed around the outer wall of the transformer body 1, and these fins 2 are not connected to the interior of the transformer body 1.

[0055] like Figure 1As shown, a rectangular bracket 3 is fixedly installed at the top center of the transformer body 1. A groove is formed at the top of the bracket 3, and a cylindrical first rotating shaft 31 is rotatably connected to the groove via a bearing. The first rotating shaft 31 is arranged along the length of the transformer body 1. A plate 4 is fixedly connected to the first rotating shaft 31, specifically as follows: Figure 2 As shown, two connecting plates 41 are fixedly connected to the center of the plate 4. The two connecting plates 41 are respectively fixedly connected to the two ends of the outer wall of the first rotating shaft 31, thereby realizing the fixed connection between the first rotating shaft 31 and the plate 4.

[0056] like Figure 1 As shown, the bracket 3 has a Z-shaped rigid connector 6 that slides internally. Specifically, as shown... Figure 3 As shown, a rectangular slide rail 32 is provided inside the bracket 3, and a rectangular sliding opening 33 is provided on the bottom surface of the bracket 3. The slide rail 32 and the sliding opening 33 are connected. The rigid connector 6 is slidably disposed in the slide rail 32 and the sliding opening 33, thereby realizing the sliding connection between the bracket 3 and the rigid connector 6.

[0057] like Figure 4 As shown, a flipping assembly 5 is installed on the first rotating shaft 31. One end of the rigid connecting member 6 is connected to the flipping assembly 5. Specifically, the flipping assembly 5 includes a gear 51 and a rack 52. The gear 51 is fixedly connected to the center of the outer wall of the first rotating shaft 31; the bottom of the rack 52 is fixedly connected to the top of the rigid connecting member 6, and the gear 51 and the rack 52 mesh with each other.

[0058] like Figure 4 As shown, in order to prevent the rack 52 from disengaging from the gear 51 and to increase the stability of the device, in a further embodiment, a rectangular limiting plate 53 is fixedly connected to the top of the rack 52. The limiting plate 53 can limit the downward movement distance of the rack 52 and is used to prevent the rack 52 from disengaging from the gear 51.

[0059] like Figure 1 As shown, a collection assembly 7 is installed on the transformer body 1. The other end of the rigid connector 6 is connected to the collection assembly 7. The collection assembly 7 is used to collect rainwater and move downwards with the help of gravity, thereby pulling the rigid connector 6 downwards. When the rigid connector 6 moves downwards, as... Figure 3 and Figure 4 As shown, the flipping component 5 can drive the first rotating shaft 31 to rotate, specifically, as... Figure 5 As shown, the collection assembly 7 includes: a fixing plate 71, an elastic element 72, a sliding rod 73, and a collection box 74.

[0060] The fixing plate 71 is rectangular and is fixedly installed on the side wall of the transformer body 1. A T-shaped groove 711 is provided on the top edge of the fixing plate 71. An elastic element 72 is provided at the bottom inside the groove 711. The elastic element 72 is a spring and the bottom of the spring is fixedly connected to the fixing plate 71. The sliding rod 73 is T-shaped and is slidably installed in the groove 711. The top of the spring and the bottom of the sliding rod 73 are fixedly connected. The collection box 74 is rectangular with an open top and is fixedly installed on the sliding rod 73. The bottom of the rigid connector 6 is fixedly installed on the top of the collection box 74. The collection box 74 is used to collect rainwater.

[0061] When the weight of the collection box 74 increases due to rainwater, the collection box 74 can drive the rigid connector 6 and the slide bar 73 to move downward. At this time, the slide bar 73 compresses the elastic element 72. Simultaneously, the rigid connector 6 drives the rack 52 to move downward. The rack 52 drives the gear 51 to rotate. The gear 51 drives the first rotating shaft 31 to rotate. The first rotating shaft 31 drives the plate body 4 to rotate with the help of the connecting plate 41 and actively protects the transformer body 1 from rain, reducing the probability of rainwater entering the interior and improving the service life.

[0062] like Figure 5 As shown, in order to prevent water accumulation in the collection box 74 and the transformer body 1 from being in a humid environment for a long time, a drainage hole 741 is provided through the bottom of the collection box 74. The drainage hole 741 is used to drain the rainwater inside the collection box 74.

[0063] like Figure 5 As shown, in order to prevent water from accumulating inside the collection box 74, in a further embodiment, two inclined surfaces 742 are provided at the bottom inside the collection box 74. The inclined surfaces 742 have a highest point and a lowest point. The drain hole 741 is located at the lowest point of the inclined surface 742, so that the accumulated water can be drained to a greater extent.

[0064] like Figure 1 and Figure 6 As shown, in order to prevent the drainage speed of the drain hole 741 from being greater than the rainwater collection speed of the collection box 74, which would prevent the plate 4 from rotating properly, a further solution is to install two semi-circular guide members 75 on the transformer body 1. The top of the guide member 75 is provided with a semi-circular guide groove 751. The guide groove 751 has a high end and a low end. The low end of the guide groove 751 is set at the top of the collection box 74, thereby increasing the rainwater collection speed of the collection box 74 and making the drainage speed of the drain hole 741 less than the rainwater collection speed of the collection box 74.

[0065] In the first embodiment of this application, the implementation principle of an oil-immersed transformer is as follows: In the initial state, the elastic element 72, with its own elasticity, supports the sliding rod 73 and the collection box 74 in a fixed position through elastic force. At this time, the plate 4 is in a vertical state and does not obstruct the transformer body 1, thereby preventing the plate 4 from obstructing the view of maintenance personnel (during regular inspections, maintenance personnel need to directly observe whether the outer insulation (ceramic or composite silicone rubber) of the bushing has cracks, discharge marks, severe dirt, or icing). In rainy weather, rainwater collects in the collection box 74 through the opening of the collection box 74 and the guide groove 751 of the guide element 75, thereby increasing the weight of the collection box 74. The collection box 74 can drive the rigid connector 6 and the slide bar 73 to move down. The slide bar 73 compresses the elastic element 72. Simultaneously, the rigid connector 6 drives the rack 52 to move down. The rack 52 drives the gear 51 to rotate. The gear 51 drives the first rotating shaft 31 to rotate. The first rotating shaft 31 drives the plate 4 to rotate with the help of the connecting plate 41 (in order to reduce the difficulty of rotating the plate 4, the plate 4 can be made of a lighter material and the thickness can be thinner) and actively protects the transformer body 1 from rain (at this time, the plate 4 is in a horizontal state, which can also block falling debris and improve safety), reducing the probability of rainwater entering the interior and improving service life.

[0066] Example 2:

[0067] The difference between Example 2 and Example 1 is that:

[0068] like Figure 2 As shown, heat dissipation channels 21 are provided through the top and bottom of the fins 2 to increase the heat dissipation area and improve the heat dissipation effect; furthermore, a shell connected to the inside of the heat dissipation channel 21 is provided (see Figure 2 The interior of the heat dissipation channel 21 is connected to the interior of the transformer body 1 and can contain oil.

[0069] like Figure 1 As shown, a sealing component 8 is installed at the bottom of the side wall of the transformer body 1. When the collecting component 7 moves downward, the collecting component 7 can drive the sealing component 8 to move upward and seal the bottom of the heat dissipation channel 21. Specifically, as shown... Figure 7 As shown, the enclosure assembly 8 includes: a fixed rod 81, a second rotating shaft 82, a rotating rod 83, a connecting rod 84, a guide rod 85, a sealing plate 86, and a connecting rod 87.

[0070] The transformer body 1 has two approximately rectangular fixed rods 81, which are fixedly installed at the bottom of the side wall. The second rotating shaft 82 is a round rod and is rotatably connected to the fixed rods 81 via bearings. The rotating rod 83 is oblong and is fixedly connected to the second rotating shaft 82, with connecting grooves at both ends. The connecting rod 84 is oblong, with one end rotatably connected to the bottom of the collection box 74. Specifically, the bottom of the collection box 74 has two semicircular plates fixedly connected, with one end of the connecting rod 84 rotatably installed between the two semicircular plates via a shaft, and the other end of the connecting rod 84 rotatably installed on the rotating rod 81 via a shaft. The guide rod 85 is L-shaped and has two parts. The guide rod 85 is fixedly installed on the side wall of the transformer body 1. The sealing plate 86 is approximately U-shaped and slidably connected to the guide rod 85 (through which the guide rod 85 passes), thus sliding up and down along the guide rod 85. The sealing plate 86 is located at the bottom of the heat dissipation channel 21 of the fin 2, and a circular drain port 861 is provided on the sealing plate 86, which is connected to the heat dissipation channel 21. The connecting rod 87 is approximately rectangular and fixedly connected to the bottom edge of the sealing plate 86. The connecting rod 87 is located in the connecting groove at the other end of the rotating rod 83 and is rotatably connected to the rotating rod 83 via a shaft. The rotating rod 83, connecting rod 84, and connecting rod 87 form an approximately U-shape.

[0071] When the collection box 74 moves down, it pushes the connecting rod 84 down, which in turn pushes one end of the rotating rod 83 down. At this time, the rotating rod 83 rotates with the help of the second rotating shaft 82. Simultaneously, the other end of the rotating rod 83 moves up, which in turn drives the connecting rod 87 up. The connecting rod 87 drives the sealing plate 86 up along the guide rod 85 and seals the bottom of the heat dissipation channel 21. At this time, rainwater can collect in the heat dissipation channel 21 for sufficient heat exchange, increasing the heat dissipation effect of the transformer body 1. At the same time, the drain outlet 861 discharges the rainwater after absorbing heat, ensuring subsequent heat dissipation. After the rainwater is discharged, the collection box 74 moves up, the sealing plate 86 moves down, and the water accumulated inside the heat dissipation channel 21 is released.

[0072] Unless otherwise defined, the terms or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar words used in this application description do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "a" or "one," and similar words do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising," "including," and similar words mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0073] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An oil-immersed transformer, comprising a transformer body (1), wherein fins (2) are mounted on the transformer body (1), characterized in that: The top and bottom of the fins (2) are provided with heat dissipation channels (21). A bracket (3) is installed on the transformer body (1). A first rotating shaft (31) is rotatably connected to the bracket (3). A plate (4) is fixedly connected to the first rotating shaft (31). A flipping assembly (5) is installed on the first rotating shaft (31). A rigid connector (6) is slidably connected inside the bracket (3). One end of the rigid connector (6) is connected to the flipping assembly (5). A collection assembly (7) is installed on the transformer body (1). The other end of the rigid connector (6) is connected to the collection component (7), which is used to collect rainwater and move downward with the help of the gravity of the rainwater, thereby pulling the rigid connector (6) downward. When the rigid connector (6) moves downward, the flipping component (5) can drive the first rotating shaft (31) to rotate. The transformer body (1) is equipped with a sealing component (8). When the collection component (7) moves downward, the collection component (7) can drive the sealing component (8) to move upward and seal the bottom of the heat dissipation channel (21).

2. The oil-immersed transformer according to claim 1, characterized in that: A connecting plate (41) is fixedly connected to the plate (4), and the connecting plate (41) is fixedly connected to the first rotating shaft (31) to achieve a fixed connection between the first rotating shaft (31) and the plate (4).

3. The oil-immersed transformer according to claim 1, characterized in that: The bracket (3) has a slide (32) inside and a sliding opening (33) on its surface. The slide (32) and the sliding opening (33) are connected. The rigid connector (6) is slidably disposed in the slide (32) and the sliding opening (33) to realize the sliding connection between the bracket (3) and the rigid connector (6).

4. The oil-immersed transformer according to claim 1, characterized in that: The flipping component (5) includes: Gear (51), the gear (51) and the first rotating shaft (31) are fixedly connected; A rack (52) is fixedly connected to one end of the rigid connector (6), and the gear (51) meshes with the rack (52).

5. The oil-immersed transformer according to claim 4, characterized in that: A limiting plate (53) is installed on the rack (52), and the limiting plate (53) is used to prevent the rack (52) from disengaging from the gear (51).

6. The oil-immersed transformer according to claim 1, characterized in that: The collection component (7) includes: A fixing plate (71) is installed on the transformer body (1), and a sliding groove (711) is provided on the fixing plate (71). An elastic element (72) is disposed within the groove (711); A slide rod (73) is slidably disposed within the slide groove (711); The collection box (74) is mounted on the slide bar (73). The other end of the rigid connector (6) is mounted on the collection box (74). The collection box (74) is used to collect rainwater. When the weight of the collection box (74) increases due to rainwater, the collection box (74) can drive the rigid connector (6) and the slide bar (73) to move down. At this time, the slide bar (73) compresses the elastic member (72).

7. The oil-immersed transformer according to claim 6, characterized in that: The collection box (74) is provided with a drain hole (741), which is used to drain the rainwater inside the collection box (74). The drainage speed of the drain hole (741) is less than the speed at which the collection box (74) collects rainwater.

8. The oil-immersed transformer according to claim 7, characterized in that: The collection box (74) has an inclined surface (742) inside, the inclined surface (742) has a highest point and a lowest point, and the drain hole (741) is located at the lowest point of the inclined surface (742).

9. The oil-immersed transformer according to claim 7, characterized in that: A flow guide (75) is installed on the transformer body (1). A flow guide groove (751) is provided inside the flow guide (75). The flow guide groove (751) has a high end and a low end. The low end of the flow guide groove (751) is located on the top of the collection box (74), thereby increasing the speed at which the collection box (74) collects rainwater and making the drainage speed of the drain hole (741) less than the speed at which the collection box (74) collects rainwater.

10. The oil-immersed transformer according to claim 6, characterized in that: The enclosure component (8) includes: A fixing rod (81) is installed on the transformer body (1); The second rotating shaft (82) is rotatably connected to the fixed rod (81); Rotating rod (83), the rotating rod (83) is fixedly connected to the second rotating shaft (82); A connecting rod (84), one end of which is rotatably connected to the collection box (74), and the other end of which is rotatably connected to one end of the rotating rod (83); A guide rod (85) is mounted on the transformer body (1); A sealing plate (86) is slidably connected to the guide rod (85). The sealing plate (86) is located at the bottom of the heat dissipation channel (21) of the fin (2). A drain port (861) is provided on the sealing plate (86), and the drain port (861) is connected to the heat dissipation channel (21). A connecting rod (87) is fixedly connected to the sealing plate (86), and the other end of the connecting rod (87) is rotatably connected to the rotating rod (83).

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