Outdoor oil-immersed transformer capable of avoiding rainwater penetration

Abstract

The application relates to the technical field of transformers, and discloses an outdoor oil-immersed transformer capable of avoiding rainwater penetration, the bottom of a storage pool is fixedly connected with a fixed bottom frame, the top of the storage pool is sleeved with and slidably connected with a drying device, the top of the drying device is fixedly connected with a waterproof shell, the inner wall bottom of the storage pool is fixedly connected with a fixed pipe, the side of the fixed pipe is sleeved with and fixedly connected with a magnetic sheet rack, the side of a lead-out pipe is fixedly connected with a rotating device, the top of the lead-out pipe is fixedly connected with an exhaust device, the top center position of a sliding top shell is fixedly connected with an adjusting device, the rotating device is arranged below a power receiving ring, the sliding top shell is sleeved with the side of the storage pool and slidably connected with the storage pool, and the top of the exhaust device is fixedly connected with the inner wall top of the waterproof shell, the outdoor oil-immersed transformer capable of avoiding rainwater penetration can actively remove water and perform internal breathing.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, specifically to an outdoor oil-immersed transformer that can prevent rainwater from seeping in. Background Technology

[0002] Traditional outdoor oil-immersed transformers commonly employ rain protection methods with limitations. Early methods primarily relied on passive protection such as welded seals and rubber gaskets. However, long-term thermal expansion and contraction, along with material aging, can easily lead to seal failure. Rainwater can easily accumulate in the gaps between heat sinks and at bushing installation points. Conventional sealants are prone to embrittlement and cracking under ultraviolet radiation. The complex structure at the connection points between these functional components and the enclosure often becomes a weak point for rainwater infiltration. As the power grid's requirements for equipment reliability increase, rainwater protection design has evolved from "passive leak sealing" to "active drainage + multiple protection." Designs such as inclined top covers, seamless enclosures, and concealed bolts reduce rainwater accumulation and infiltration paths. The application of weather-resistant sealing materials (such as EPDM rubber), anti-corrosion coatings, and composite protective layers, along with improvements to the oil tank breather structure, the addition of double-layer filters and condensate collection devices, prevent rainwater from entering through the breathing channel. Micro-differential pressure sensors monitor the enclosure's sealing status to provide early warning of leakage risks. However, scenarios such as frequent extreme weather, high-humidity coastal environments, and long-life-cycle maintenance difficulties still place higher demands on waterproof performance. Future technological development focuses on eliminating the traditional oil tank and adopting an elastic expansion oil tank to completely eliminate the risk of water ingress into the respirator. It also involves maintaining the pressure balance inside and outside the tank through an intelligent pressure regulation system to prevent rainwater from being drawn in due to negative pressure. Furthermore, it involves applying a superhydrophobic coating to key parts of the tank to prevent rainwater from adhering and forming a water film, and enabling standardized replacement of sealing modules at key interfaces to improve maintenance efficiency.

[0003] CN115376782A describes an outdoor oil-immersed transformer that prevents rainwater infiltration. When collecting rainwater through a collection box, the collection box will descend at the top of the oil-immersed transformer body via a vertical toothed rod, thereby preventing external rainwater from flowing into the interior of the oil-immersed transformer body and avoiding damage to the electrical components inside the oil-immersed transformer body.

[0004] However, the aforementioned equipment lacks the function of active drainage due to limited waterproofing measures, and also inhibits the internal breathing of the transformer. Summary of the Invention

[0005] To solve the above technical problems, the present invention is achieved through the following technical solution: an outdoor oil-immersed transformer that can prevent rainwater from seeping in, comprising: a storage tank, the storage tank having a storage shell structure, and a fixed base frame fixedly connected to the bottom of the storage tank, and a drying device being sleeved and slidably connected to the top of the storage tank; A waterproof housing, which is fixedly attached to the top of the storage tank; A fixed tube is installed at the bottom of the storage tank, the top of the fixed tube is connected to the storage tank, and a magnetic sheet holder is sleeved and fixedly connected to the side of the fixed tube. The drying device includes a sliding top shell, with a discharge pipe extending through and fixedly connected to the top of the sliding top shell. A contact ring is fixedly connected to the side of the discharge pipe, and a rotating device is fixedly connected to the side of the discharge pipe. An exhaust device is fixedly connected to the top of the discharge pipe. An adjusting device is fixedly connected to the center of the top of the sliding top shell. The rotating device is positioned below the contact ring. The sliding top shell is fitted onto the side of the storage tank and slidably connected to the storage tank. The top of the exhaust device is fixedly connected to the top of the inner wall of the waterproof outer shell. Transformer oil is stored inside the storage tank. A magnetic plate holder fixes the coil windings, and a fixing tube secures the magnetic plate holder. The sliding top shell, fixed inside the storage tank, slides along the side of the tank to change the internal air pressure, facilitating ventilation and exhaust within the transformer. The outlet pipe penetrates the transformer oil, separating and absorbing moisture through osmosis. Current is introduced into the outlet pipe via a connecting ring, heating it. The heated moisture rises along the outlet pipe into the exhaust device, where it disperses water vapor, thus removing moisture from the transformer. Compared to the periodic maintenance design of traditional enclosed transformers, this design avoids performance degradation caused by internal moisture accumulation.

[0006] Preferably, the rotating device includes a rotating gear ring, the side of which is engaged with the rotating part of the first motor, a rotating disk is fixedly connected to the bottom of the rotating gear ring, a conveying blade is fixedly connected to the bottom of the rotating disk, the outlet pipe is located on one side of the conveying blade, the side of the first motor is fixedly connected to the top of the sliding top shell through a bracket, and the conveying blade is located inside.

[0007] Preferably, the exhaust device includes an exhaust pipe, a rotating fan blade is rotatably connected to the bottom of the inner wall of the exhaust pipe, an exhaust top is fixedly connected to the top of the exhaust pipe, the bottom of the exhaust pipe communicates with the top of the outlet pipe, and the bottom of the exhaust pipe is fixedly connected to the top of the first motor.

[0008] Preferably, the adjusting device includes a second motor, the drive shaft of which is fixedly connected to a rotating stud. A detector is fixedly connected to the top of the rotating stud, and the side of the rotating stud is threadedly connected to the top of the storage tank via a bracket. The bottom of the second motor is fixedly connected to the top of the sliding top shell. When the first motor is started, its rotating part drives a rotating gear ring to rotate, which in turn drives a rotating disk to rotate. The rotating disk then drives a conveyor blade to rotate, causing transformer oil to flow along the inside of the fixed pipe. The flow of transformer oil dissipates heat from the inside of the fixed pipe, thereby heating the water vapor inside the tank. When the rotating fan blades are started, they drive air to... The airflow causes moisture to move along the inner wall of the exhaust top, where it is sprayed away. Simultaneously, the second motor is activated, its drive shaft rotating a stud. The stud, through its threads and support, alters the distance between the second motor and the storage tank, thus changing the distance between the sliding top shell and the storage tank. This facilitates the separation of moisture by increasing the pressure inside the storage tank through compression. A detector is installed to monitor the moisture content within the storage tank. The sliding nested design between the sliding top shell and the storage tank allows the transformer oil inside to breathe under different pressures, facilitating the active discharge of moisture.

[0009] Preferably, the fixed tube includes a fixed outer tube, the inner wall of which is fixedly connected with a spiral strip, and an oil inlet hole is provided on the bottom side of the fixed outer tube. The fixed outer tube extends into the interior of the magnetic plate holder and is fixedly connected to the inner side of the magnetic plate holder. The conveying blade is disposed on the inner wall of the fixed outer tube. The fixed outer tube facilitates the flow of transformer oil. The oil enters the interior of the fixed outer tube along the oil inlet hole. The spiral strip increases the contact area with the fixed outer tube. The conveying blade facilitates the oil entering the interior of the fixed outer tube along the interior of the oil inlet hole. At the same time, the opposite thread arrangement of the spiral strip and the conveying blade facilitates the formation of turbulence in the oil inside the fixed outer tube, thereby facilitating the agitation and rise of water from the bottom of the oil, and thus facilitating the active separation of water in the oil.

[0010] Preferably, the waterproof outer shell includes a nested shell, a guide top is fixedly connected to the top of the nested shell, a fixing strip is fixedly connected to the top of the guide top, a sealing strip is fixedly connected to the inner wall side of the nested shell, and the top of the inner wall of the guide top is fixedly connected to the top of the venting top.

[0011] Preferably, the sealing strip includes an upper guide strip and a lower guide strip. The side of the upper guide strip is fixedly connected to the side of the storage tank, and the side of the lower guide strip is fixedly connected to the inner wall side of the nested shell. The fixed strip is designed to increase the top strength of the guide top and guide rainwater in conjunction with the guide top. The nested design of the nested shell and the sliding top shell helps to reduce rainwater intrusion from the outside. The upper and lower guide strips are combined and work together. As the sliding top shell moves, the upper and lower guide strips move. The projections of the upper and lower guide strips in the vertical direction coincide, which facilitates the sealing of the ventilation hole by the combination of the upper and lower guide strips after the sliding top shell moves. At the same time, the inclined design of the upper and lower guide strips helps to prevent rainwater from intruding from the outside.

[0012] This invention provides an outdoor oil-immersed transformer that prevents rainwater infiltration. It offers the following advantages: 1. This outdoor oil-immersed transformer, designed to prevent rainwater infiltration, features a sliding top shell. Transformer oil is stored in a reservoir, and a plate holder supports the coil windings. A fixing tube positions the plate holder within the reservoir. The sliding top shell can move along the side of the reservoir to regulate the internal air pressure, facilitating ventilation and air release within the transformer. A drain pipe extends into the transformer oil, using osmosis to separate and absorb moisture. Current is then introduced through a contact ring for heating. Heated moisture rises along the drain pipe into the exhaust system, where it diffuses and escapes as water vapor, thus reducing internal moisture levels. Compared to traditional enclosed transformers requiring regular maintenance, this design helps prevent performance problems caused by moisture accumulation.

[0013] 2. This outdoor oil-immersed transformer, designed to prevent rainwater infiltration, is equipped with conveying blades. Upon starting the first motor, the rotating gear ring and rotating disk rotate, driving the conveying blades and propelling the transformer oil through the fixed pipe. The oil flow helps dissipate heat within the fixed pipe, causing heated water vapor to move. Simultaneously, rotating fan blades propel airflow, causing moisture to move with the air and be sprayed out along the inner wall of the exhaust top, where the airflow carries away the separated moisture. A second motor drives a rotating stud to rotate, adjusting the distance between the motor and the storage tank via a threaded structure. This alters the position between the sliding top shell and the storage tank, and pressure regulation helps separate moisture from the storage tank. A detector monitors the moisture content of the storage tank. The sliding nested structure of the sliding top shell and the storage tank allows the transformer oil to "breathe" under different pressures, thus supporting the active discharge of internal moisture.

[0014] 3. This outdoor oil-immersed transformer, designed to prevent rainwater infiltration, features an oil inlet. A fixed outer tube provides a flow path for the transformer oil, which enters the tube through the inlet. A spiral blade increases the contact area with the outer tube, while conveying blades assist the oil in entering. The spiral blade and conveying blades use opposite thread directions, creating turbulence within the tube and causing water to rise from the bottom, thus supporting water separation.

[0015] 4. This outdoor oil-immersed transformer, designed to prevent rainwater infiltration, features a guide top. Fixing strips enhance the structural strength of the guide top and, together with it, guide rainwater flow. The nested shell and sliding top shell are nested together to reduce the possibility of rainwater entry. The upper and lower guide strips work together, adjusting their positions as the sliding top shell moves. Their vertical projections overlap, allowing the ventilation holes to remain sealed even after the sliding top shell has moved. The inclined layout of the upper and lower guide strips further helps to block external rainwater intrusion. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an outdoor oil-immersed transformer that can prevent rainwater from seeping in, according to the present invention. Figure 2 This is a schematic diagram of the internal structure of an outdoor oil-immersed transformer that can prevent rainwater from seeping in, according to the present invention. Figure 3 This is a schematic diagram of the drying device of the present invention; Figure 4 This is a schematic diagram of the rotating device structure of the present invention; Figure 5 This is a schematic diagram of the exhaust device structure of the present invention; Figure 6 This is a schematic diagram of the regulating device structure of the present invention; Figure 7 This is a schematic diagram of the fixed tube structure of the present invention; Figure 8 This is a schematic diagram of the waterproof outer shell structure of the present invention; Figure 9 This is a schematic diagram of the sealing strip structure of the present invention.

[0017] In the diagram: 1. Storage tank; 2. Fixed base frame; 3. Drying device; 4. Waterproof outer shell; 5. Fixed pipe; 6. Magnetic plate holder; 301. Sliding top shell; 302. Outlet pipe; 303. Electrical contact ring; 304. Rotating device; 305. Exhaust device; 306. Adjusting device; 3041. Rotating gear ring; 3042. First motor; 3043. Rotating disk; 3044. Conveying blade; 3051. Exhaust pipe; 3052. Rotating fan blade; 3053. Exhaust top; 3061. Second motor; 3062. Rotating stud; 3063. Detector; 501. Fixed outer pipe; 502. Spiral strip; 503. Oil inlet; 401. Nested shell; 402. Guide top; 403. Fixed strip; 404. Sealing strip; 4041. Upper guide strip; 4042. Lower guide strip. Detailed Implementation

[0018] 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] For the first embodiment, please refer to... Figures 1-3 The present invention provides a technical solution: an outdoor oil-immersed transformer that can prevent rainwater infiltration, comprising: Storage tank 1 has a storage shell structure and a fixed base frame 2 fixedly connected to the bottom of storage tank 1. A drying device 3 is fitted and slidably connected to the top of storage tank 1. Waterproof housing 4, which is fixedly connected to the top of storage tank 1; A fixing tube 5 is installed at the bottom of the storage tank 1, the top of the fixing tube 5 is connected to the storage tank 1, and a magnetic sheet holder 6 is sleeved and fixedly connected to the side of the fixing tube 5. The drying device 3 includes a sliding top shell 301, with an outlet pipe 302 passing through and fixedly connected to the top of the sliding top shell 301. A contact ring 303 is fixedly connected to the side of the outlet pipe 302, and a rotating device 304 is fixedly connected to the side of the outlet pipe 302. An exhaust device 305 is fixedly connected to the top of the outlet pipe 302. An adjusting device 306 is fixedly connected to the center of the top of the sliding top shell 301. The rotating device 304 is located below the contact ring 303. The sliding top shell 301 is sleeved on the side of the storage tank 1 and slidably connected to the storage tank 1. The top of the exhaust device 305 is fixedly connected to the top of the inner wall of the waterproof outer shell 4.

[0020] Transformer oil is stored inside storage tank 1. Magnetic plate holder 6 fixes the coil windings. Fixing tube 5 fixes magnetic plate holder 6 inside storage tank 1. The sliding top shell 301 slides along the side of storage tank 1 to facilitate changes in the air pressure inside storage tank 1, thus facilitating ventilation and exhaust inside the transformer. The outlet pipe 302 is inserted into the transformer oil to separate and absorb moisture through osmotic pressure. Current is introduced into the outlet pipe 302 through the contact ring 303 to heat it. The heated moisture rises along the outlet pipe 302 and enters the exhaust device 305. Under the action of the exhaust device 305, water vapor is scattered, thus facilitating the removal of moisture inside the transformer. Compared with the periodic maintenance design of traditional enclosed transformers, this design avoids the performance degradation caused by internal moisture accumulation.

[0021] For the second embodiment, please refer to... Figures 1-6 Based on the first embodiment, the present invention provides a technical solution: the rotating device 304 includes a rotating gear ring 3041, the side of the rotating gear ring 3041 is engaged with the rotating part of the first motor 3042, the bottom of the rotating gear ring 3041 is fixedly connected to a rotating disk 3043, the bottom of the rotating disk 3043 is fixedly connected to a conveying blade 3044, the outlet pipe 302 is disposed on one side of the conveying blade 3044, the side of the first motor 3042 is fixedly connected to the top of the sliding top shell 301 through a bracket, and the conveying blade 3044 is disposed inside the fixed pipe 5.

[0022] The exhaust device 305 includes an exhaust pipe 3051, a rotating fan blade 3052 rotatably connected to the bottom of the inner wall of the exhaust pipe 3051, an exhaust top 3053 fixedly connected to the top of the exhaust pipe 3051, the bottom of the exhaust pipe 3051 communicating with the top of the outlet pipe 302, and the bottom of the exhaust pipe 3051 fixedly connected to the top of the first motor 3042.

[0023] The adjusting device 306 includes a second motor 3061, a rotating stud 3062 fixedly connected to the drive shaft of the second motor 3061, a detector 3063 fixedly connected to the top of the rotating stud 3062, the side of the rotating stud 3062 being threadedly connected to the top of the storage tank 1 via a bracket, and the bottom of the second motor 3061 being fixedly connected to the top of the sliding top shell 301.

[0024] The first motor 3042 is started. The rotating part of the first motor 3042 drives the rotating gear ring 3041 to rotate. The rotation of the rotating gear ring 3041 drives the rotating disk 3043 to rotate. The rotation of the rotating disk 3043 drives the conveying blade 3044 to rotate. The rotation of the conveying blade 3044 drives the transformer oil to flow along the inside of the fixed pipe 5. The flow of transformer oil dissipates heat from the inside of the fixed pipe 5. The heat is dissipated through the flowing liquid, thereby heating the water vapor inside the tank and causing it to flow. The rotating fan blade 3052 is started. The rotation of the fan blade 3052 drives the air to flow, thereby moving the water under the action of the air and spraying it along the inner wall of the exhaust top 3053, thus carrying it away through the air flow. The separated water simultaneously activates the second motor 3061. The drive shaft of the second motor 3061 rotates, causing the rotating stud 3062 to rotate. The rotating stud 3062, through its thread and bracket, changes the distance between the second motor 3061 and the storage tank 1. This, in turn, changes the distance between the sliding top shell 301 and the storage tank 1, facilitating the separation of water from the storage tank 1 by increasing the internal pressure through compression. The detector 3063 is designed to detect the water content inside the storage tank 1. The sliding nested design between the sliding top shell 301 and the storage tank 1 allows the transformer oil inside the storage tank 1 to "breathe" under different air pressures, thus facilitating the active discharge of water.

[0025] Third embodiment, please refer to Figures 1-7 Based on the second embodiment, the present invention provides a technical solution: the fixed tube 5 includes a fixed outer tube 501, a spiral strip 502 is fixedly connected to the inner wall of the fixed outer tube 501, an oil inlet hole 503 is opened on the bottom side of the fixed outer tube 501, the fixed outer tube 501 extends into the interior of the magnetic sheet frame 6 and is fixedly connected to the inner side of the magnetic sheet frame 6, and the conveying blade 3044 is disposed on the inner wall of the fixed outer tube 501.

[0026] The fixed outer tube 501 facilitates the flow of transformer oil. The oil enters the interior of the fixed outer tube 501 along the oil inlet 503. The spiral strip 502 increases the contact area with the fixed outer tube 501. The conveying blade 3044 facilitates the oil entering the interior of the fixed outer tube 501 along the oil inlet 503. At the same time, the opposite thread arrangement of the spiral strip 502 and the conveying blade 3044 facilitates the formation of turbulence in the oil inside the fixed outer tube 501, thereby facilitating the agitation and rise of water from the bottom of the oil, and thus facilitating the active separation of water in the oil.

[0027] For the fourth embodiment, please refer to [link / reference]. Figures 1-9Based on the third embodiment, the present invention provides a technical solution: the waterproof shell 4 includes a nested shell 401, a guide top 402 is fixedly connected to the top of the nested shell 401, a fixing strip 403 is fixedly connected to the top of the guide top 402, a sealing strip 404 is fixedly connected to the inner wall side of the nested shell 401, and the top of the inner wall of the guide top 402 is fixedly connected to the top of the exhaust top 3053.

[0028] The sealing strip 404 includes an upper guide strip 4041 and a lower guide strip 4042. The side of the upper guide strip 4041 is fixedly connected to the side of the storage pool 1, and the side of the lower guide strip 4042 is fixedly connected to the inner wall side of the nested shell 401.

[0029] The fixing strip 403 is designed to increase the top strength of the guide top 402 and guide rainwater in conjunction with the guide top 402. The nested design of the nested shell 401 and the sliding top shell 301 helps to reduce rainwater intrusion from the outside. The upper guide strip 4041 and the lower guide strip 4042 are combined and cooperate. As the sliding top shell 301 moves, it drives the upper guide strip 4041 and the lower guide strip 4042 to move. The projections of the upper guide strip 4041 and the lower guide strip 4042 in the vertical direction coincide, so that the ventilation hole can be sealed by the combination of the upper guide strip 4041 and the lower guide strip 4042 after the sliding top shell 301 moves. At the same time, the inclined setting of the upper guide strip 4041 and the lower guide strip 4042 helps to prevent rainwater from intruding from the outside.

[0030] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. An outdoor oil-immersed transformer that prevents rainwater infiltration, characterized in that, include: Storage tank (1), which has a storage shell structure and a fixed base frame (2) fixedly connected to the bottom of the storage tank (1), and a drying device (3) is sleeved and slidably connected to the top of the storage tank (1). A waterproof outer shell (4) is fixedly connected to the top of the storage tank (1); A fixing tube (5) is installed at the bottom of the storage tank (1). The top of the fixing tube (5) is connected to the storage tank (1). A magnetic sheet holder (6) is sleeved and fixedly connected to the side of the fixing tube (5). The drying device (3) includes a sliding top shell (301), with an outlet pipe (302) connected through and fixed to the top of the sliding top shell (301). A contact ring (303) is fixedly connected to the side of the outlet pipe (302), and a rotating device (304) is fixedly connected to the side of the outlet pipe (302). An exhaust device (305) is fixedly connected to the top of the outlet pipe (302). An adjusting device (306) is fixedly connected to the center of the top of the sliding top shell (301). The rotating device (304) is located below the contact ring (303). The sliding top shell (301) is sleeved on the side of the storage tank (1) and slidably connected to the storage tank (1). The top of the exhaust device (305) is fixedly connected to the top of the inner wall of the waterproof outer shell (4).

2. An outdoor oil-immersed transformer that prevents rainwater infiltration according to claim 1, characterized in that: The rotating device (304) includes a rotating gear ring (3041), the side of which is engaged with the rotating part of the first motor (3042), the bottom of which is fixedly connected to a rotating disk (3043), the bottom of which is fixedly connected to a conveying blade (3044), the outlet pipe (302) is located on one side of the conveying blade (3044), the side of the first motor (3042) is fixedly connected to the top of the sliding top shell (301) through a bracket, and the conveying blade (3044) is located inside the fixed pipe (5).

3. An outdoor oil-immersed transformer that prevents rainwater infiltration according to claim 2, characterized in that: The exhaust device (305) includes an exhaust pipe (3051), a rotating fan blade (3052) is rotatably connected to the bottom of the inner wall of the exhaust pipe (3051), an exhaust top (3053) is fixedly connected to the top of the exhaust pipe (3051), the bottom of the exhaust pipe (3051) is connected to the top of the outlet pipe (302), and the bottom of the exhaust pipe (3051) is fixedly connected to the top of the first motor (3042).

4. An outdoor oil-immersed transformer that prevents rainwater infiltration according to claim 1, characterized in that: The adjustment device (306) includes a second motor (3061), the drive shaft of the second motor (3061) is fixedly connected to a rotating stud (3062), and the top of the rotating stud (3062) is fixedly connected to a detector (3063).

5. An outdoor oil-immersed transformer that prevents rainwater infiltration according to claim 4, characterized in that: The side of the rotating stud (3062) is threadedly connected to the top of the storage tank (1) via a bracket, and the bottom of the second motor (3061) is fixedly connected to the top of the sliding top shell (301).

6. An outdoor oil-immersed transformer that prevents rainwater infiltration according to claim 2, characterized in that: The fixed tube (5) includes a fixed outer tube (501), the inner wall of which is fixedly connected with a spiral strip (502), and an oil inlet hole (503) is provided on the bottom side of the fixed outer tube (501).

7. An outdoor oil-immersed transformer that prevents rainwater infiltration according to claim 6, characterized in that: The fixed outer tube (501) extends into the interior of the magnetic sheet holder (6) and is fixedly connected to the inner wall side of the magnetic sheet holder (6). The conveying blade (3044) is disposed on the inner wall of the fixed outer tube (501).

8. An outdoor oil-immersed transformer that prevents rainwater infiltration according to claim 3, characterized in that: The waterproof outer shell (4) includes a nested shell (401), a guide top (402) is fixedly connected to the top of the nested shell (401), a fixing strip (403) is fixedly connected to the top of the guide top (402), a sealing strip (404) is fixedly connected to the inner wall side of the nested shell (401), and the top of the inner wall of the guide top (402) is fixedly connected to the top of the exhaust top (3053).

9. An outdoor oil-immersed transformer that prevents rainwater infiltration according to claim 8, characterized in that: The sealing strip (404) includes an upper guide strip (4041) and a lower guide strip (4042). The side of the upper guide strip (4041) is fixedly connected to the side of the storage pool (1), and the side of the lower guide strip (4042) is fixedly connected to the inner wall side of the nested shell (401).

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