A special oil-immersed transformer with protective structure and protective device

Abstract

The present invention discloses an oil-immersed special transformer with a protective structure and a protective device, and relates to the field of protective devices. An oil-immersed special transformer with a protective structure comprises a transformer body, a heat sink is arranged on the side of the transformer body, and also comprises: four groups of telescopic cylinders, all fixedly connected to the bottom of the transformer body, and the telescopic ends of the four groups of telescopic cylinders are respectively facing the four sides of the transformer body; two groups of movable columns, respectively fixedly connected to the telescopic ends of the telescopic cylinders; the present invention uses a rotating plate that can be adjusted and rotated. When the temperature is high, the gap between the rotating plates is small when it is not rotating, and it can still play a protective role. When ventilation is required, ventilation and heat dissipation can be carried out by rotating the rotating plates, while reducing the entry of external debris, thereby playing a protective role.

Description

Technical Field

[0001] The invention belongs to the technical field of protective devices, and in particular relates to an oil-immersed special transformer with a protective structure and a protective device. Background Art

[0002] As one of the main power transmission and transformation equipment in the substation, the transformer plays a core role in the substation. It can also be said that the transformer is the heart of the substation. Most large power transformers are oil-immersed transformers. The characteristic of oil-immersed transformers is that they use insulating oil as the heat dissipation and insulation medium for the transformer windings and cores.

[0003] When a large oil-immersed special transformer is in use, it is generally installed on the ground. In order to prevent irrelevant personnel from approaching, a guardrail is usually installed near the transformer. However, the existing guardrail generally uses a fence to surround the transformer in a circle to isolate the transformer. This method has great disadvantages. The larger the spacing between the fences, the poorer the protection ability, and external debris can easily enter through the gaps. The smaller the spacing between the fences, the lower the ventilation and heat dissipation effects. Therefore, an oil-immersed special transformer with a protective structure and a protective device are proposed.

[0004] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0005] The object of the present invention is to provide an oil-immersed special transformer with a protective structure and a protective device, which can play a role of auxiliary heat dissipation without affecting the protective function.

[0006] In order to achieve the above object, a specific embodiment of the present invention provides an oil-immersed special transformer with a protective structure, including a transformer body, a heat sink is provided on the side of the transformer body, and further includes:

[0007] Four groups of telescopic cylinders are fixedly connected to the bottom of the transformer body, and the telescopic ends of the four groups of telescopic cylinders are respectively facing the four sides of the transformer body;

[0008] Two groups of movable columns are respectively fixedly connected to the telescopic ends of the telescopic cylinder;

[0009] A plurality of rotating plates are rotatably connected to the moving column at equal intervals. The rotating plates can generate airflow by rotating to dissipate heat around the transformer body. The telescopic cylinder is used to adjust the airflow to approach or away from the heat sink on the transformer body.

[0010] Multiple sets of auxiliary plates are rotatably connected to the rotating plate at equal intervals, and the strength of the airflow generated by the rotating plate through rotation can be changed through the auxiliary plates

[0011] In one or more embodiments of the present invention, in order to increase the length and thus increase the wind force generated by the rotation, further, a pneumatic shaft is fixedly connected inside the auxiliary plate, an extension plate is rotatably connected to the auxiliary plate, the extension plate is fixedly connected to the rotating end of the pneumatic shaft, an air pump is provided at the bottom of the transformer body, an air outlet pipe is connected to the air outlet end of the air pump, and the air outlet pipe is connected to the pneumatic shaft for driving the rotation of the pneumatic shaft.

[0012] In one or more embodiments of the present invention, in order to clean both sides of the heat sink, further, an inner tube is provided in the extension plate, and a plurality of groups of air outlets are symmetrically provided on the side of one end of the extension plate away from the pneumatic shaft, and the inner tube is communicated with the air outlet end of the pneumatic shaft, and the inner tube is communicated with the air outlet, and through the cooperation of the telescopic cylinder and the air pump, the air outlets on both sides of the extension plate can be moved between the heat sinks, and then both sides of the heat sink can be cleaned by airflow.

[0013] In one or more embodiments of the present invention, in order to facilitate the rotation of the rotating plate, further, the side of the moving column is fixedly connected to a motor, the moving column is rotatably connected to a transmission rod, the transmission rod is fixedly connected to the output end of the motor, the rotating end of the bottom of the rotating plate passes through the moving column, and the rotating end is fixedly connected to a bevel gear 2, and a bevel gear 1 matching the bevel gear 2 is fixedly connected to the transmission rod at equal intervals, and the bevel gear 1 is meshingly connected to the bevel gear 2.

[0014] In one or more embodiments of the present invention, in order to facilitate the rotation of the extension plate, further, a telescopic rod is fixedly connected inside the rotating plate, a rack is slidably connected inside the rotating plate, the rack is fixedly connected to the telescopic end of the telescopic rod, the rotating end at the bottom of the extension plate passes through the rotating plate, and a gear part is fixedly connected to the rotating end, and the gear part is meshingly connected to the rack.

[0015] In one or more embodiments of the present invention, in order to further improve the cleaning effect on both sides of the heat sink, further, an inflatable airbag is fixedly connected on both sides of the extension plate away from one end of the pneumatic shaft, and the inflatable airbag can be expanded by the entry of gas, and then approached until it rests on the side wall of the heat sink. The side wall of the inflatable airbag is provided with multiple groups of jet ports, and the jet ports are used to spray gas to loosen dust on the side wall of the heat sink.

[0016] In one or more embodiments of the present invention, in order to facilitate the entry of gas, a connecting pipe is further connected to the outlet end of the outlet pipe, and the connecting pipe passes through the second bevel gear and the gear member and communicates with the inlet end of the pneumatic shaft.

[0017] In one or more embodiments of the present invention, the protective device includes an oil-immersed special transformer with a protective structure, and also includes an enclosure, the transformer body is fixedly connected in the enclosure, and the two groups of movable columns are slidably connected in the enclosure.

[0018] In one or more embodiments of the present invention, in order to facilitate movement, further, the bottom of the movable column is rotatably connected to a rotating wheel, and the rotating wheel is rollingly connected to the enclosure.

[0019] In one or more embodiments of the present invention, in order to facilitate installation, further, the telescopic cylinder and the air pump are both fixedly connected to the enclosure, and the air outlet pipe is a telescopic hose.

[0020] Compared with the prior art, the oil-immersed special transformer and protective device with a protective structure of the present invention have a position-adjustable and rotatable rotating plate. When the temperature is high and ventilation is required, ventilation and heat dissipation can be achieved by rotating the rotating plate, while reducing the entry of external debris and playing a protective role. When not rotating, the gap between the rotating plates is small and can still play a protective role. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a structural schematic diagram of an oil-immersed special transformer with a protective structure and a protective device proposed by the present invention;

[0023] Figure 2 This is a structural schematic diagram of an oil-immersed special transformer with a protective structure and the bottom of the protective device proposed by the present invention;

[0024] Figure 3 The invention proposes an oil-immersed special transformer with a protective structure and a protective device Figure 2 The structural diagram of part A in the figure;

[0025] Figure 4 This is a structural schematic diagram of a special oil-immersed transformer with a protective structure and a sliding column, a rotating plate, and an auxiliary plate in the protective device proposed by the present invention;

[0026] Figure 5 The invention proposes an oil-immersed special transformer with a protective structure and a protective device Figure 4The structural diagram of part B;

[0027] Figure 6 This is a schematic diagram of the internal structure of a sliding column and a rotating plate in an oil-immersed special transformer with a protective structure and a protective device proposed by the present invention;

[0028] Figure 7 This is a schematic diagram of a top view of an oil-immersed special transformer with a protective structure and a protective device when an extension plate is inserted into a heat sink;

[0029] Figure 8 The invention proposes an oil-immersed special transformer with a protective structure and a protective device Figure 7 Schematic diagram of the structure of part C;

[0030] Fig. 9 This is a structural schematic diagram of a special oil-immersed transformer with a protective structure and a rotating plate, an extension plate, and an inflatable airbag in the protective device proposed by the present invention;

[0031] Fig.10 The invention proposes an oil-immersed special transformer with a protective structure and a protective device Fig. 9 Schematic diagram of the structure of part D.

[0032] In the figure: 1. transformer body; 101. heat sink; 2. enclosure; 201. telescopic cylinder; 3. moving column; 301. motor; 302. transmission rod; 303. bevel gear one; 304. bevel gear two; 305. rotating wheel; 4. rotating plate; 401. telescopic rod; 402. rack; 403. gear part; 5. auxiliary plate; 501. extension plate; 5011. inner tube; 502. pneumatic shaft; 503. air outlet; 504. inflatable airbag; 505. jet nozzle; 6. air pump; 601. air outlet pipe; 602. connecting pipe. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0034] Embodiment 1:

[0035] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig.10, an oil-immersed special transformer with a protective structure, comprising a transformer body 1, a heat sink 101 is arranged on the side of the transformer body 1, and also comprising: two groups of telescopic cylinders 201, both fixedly connected to the bottom of the transformer body 1, the telescopic ends of the two groups of telescopic cylinders 201 are respectively facing the sides of the transformer body 1 provided with the heat sink 101; two groups of moving columns 3, respectively fixedly connected to the telescopic ends of the telescopic cylinders 201; multiple groups of rotating plates 4, rotatably connected to the moving columns 3 at equal intervals, the rotating plates 4 can generate airflow by rotation to dissipate heat around the transformer body 1, and the telescopic cylinders 201 are used to adjust the distance between the airflow and the heat sink 101 on the transformer body 1; multiple groups of auxiliary plates 5, evenly spaced The auxiliary plate 501 is rotatably connected to the rotating plate 4, and the strength of the airflow generated by the rotating plate 4 through rotation can be changed through the auxiliary plate 5, thereby increasing the airflow flow rate and improving the heat dissipation effect. A pneumatic shaft 502 is fixedly connected inside the auxiliary plate 5, and an extension plate 501 is rotatably connected to the auxiliary plate 5, and the extension plate 501 is fixedly connected to the rotating end of the pneumatic shaft 502. An air pump 6 is arranged at the bottom of the transformer body 1, and an air outlet pipe 601 is connected to the air outlet end of the air pump 6, and the air outlet pipe 601 is communicated with the pneumatic shaft 502 for driving the rotation of the pneumatic shaft 502. An inner tube 5011 is arranged inside the extension plate 501, and a plurality of groups of air outlets 503 are symmetrically arranged on the side of the extension plate 501 away from one end of the pneumatic shaft 502, and the inner tube 5011 is arranged inside the extension plate 501, and a plurality of groups of air outlets 503 are symmetrically arranged on the side of the extension plate 501 away from one end of the pneumatic shaft 502. The tube 5011 is communicated with the air outlet end of the pneumatic shaft 502, and the inner tube 5011 is communicated with the air outlet 503. Through the cooperation of the telescopic cylinder 201 and the air pump 6, the air outlets 503 on both sides of the extension plate 501 can be moved between the heat sink 101, and then the two sides of the heat sink 101 are cleaned by airflow. The side of the moving column 3 is fixedly connected to the motor 301, and the moving column 3 is rotatably connected to the transmission rod 302, and the transmission rod 302 is fixedly connected to the output end of the motor 301. The rotating end of the bottom of the rotating plate 4 passes through the moving column 3, and the rotating end is fixedly connected to the bevel gear 2 304, and the transmission rod 302 is fixedly connected with the bevel gear 1 303 matching the bevel gear 2 304 at equal intervals. , bevel gear 1 303 is meshedly connected with bevel gear 2 304, a telescopic rod 401 is fixedly connected in the rotating plate 4, a rack 402 is slidably connected in the rotating plate 4, the rack 402 is fixedly connected to the telescopic end of the telescopic rod 401, the rotating end of the bottom of the extension plate 501 passes through the rotating plate 4, and a gear part 403 is fixedly connected to the rotating end, the gear part 403 is meshedly connected with the rack 402, the protective device includes an oil-immersed special transformer with a protective structure, and also includes an enclosure 2, the transformer body 1 is fixedly connected in the enclosure 2, the two groups of moving columns 3 are slidably connected in the enclosure 2, the telescopic cylinder 201 and the air pump 6 are fixedly connected to the enclosure 2, and the air outlet pipe 601 is a telescopic hose.

[0036] The enclosure 2 in the device is a frame with a base at the bottom, support rods around and an open top. A decorative ball seat is installed on the top of the support rod. The transformer body 1 is fixedly installed at the center of the base. Figure 1 As shown, in this embodiment, a movable column 3 with a moving function is only arranged at the heat sink 101, and on the other two sides, the rotating plate 4 is rotatably installed on the base, and is equipped with a motor 301 and a bevel gear set that are the same as those inside the movable column 3, for rotating the upper rotating plate 4. A movable column 3 can also be arranged, and the position of the four sides can be adjusted.

[0037] By rotating the auxiliary plate 5, the distance between the side edge of the auxiliary plate 5 and the central rotation axis of the other auxiliary plates 5 on both sides is adjusted, such as Figure 6 As shown, the auxiliary plate 5 rotates on the rotating plate 4 through its own center. When the distance between one side of the auxiliary plate 5 and the central rotation axis of the other auxiliary plates 5 on both sides is equal, the gap between the auxiliary plates 5 is the largest, that is, the angle between the auxiliary plate 5 and the rotating plate 4 is a vertical angle at this time, and the state is as follows Figure 6 As shown, when the distance difference between one side of the auxiliary plate 5 and the central rotation axis of the other auxiliary plates 5 on both sides reaches the maximum, the gap between the auxiliary plates 5 is the smallest, and the auxiliary plate 5 and the rotating plate 4 are in a horizontal state, as shown in FIG. Figure 1 , Figure 2 shown.

[0038] When the device is in use, Figure 1 As shown, at this time, the rotating plate 4 on the enclosure 2 is horizontal, acting as a fence to prevent outsiders from contacting the transformer body 1 and play a protective role. When subsequent staff need to enter, the motor 301 is used to rotate the rotating plate 4 that is initially horizontal with the moving column 3 to a vertical position, so that the staff can enter the enclosure 2 through the space between the rotating plates 4, which is convenient for subsequent work.

[0039] Because the transformer body 1 will continuously generate heat when in use, after long-term use, the temperature inside the transformer body 1 will gradually rise, and the main heat dissipation of the transformer body 1 is through the heat exchange of the heat sink 101. At this time, the motor 301 can be started, and the transmission rod 302 can be rotated by the rotation of the motor 301. The rotating plate 4 can be rotated synchronously at any time through the cooperation of the bevel gear 1 303 and the bevel gear 2 304. At this time, the rotation of the rotating plate 4 can generate airflow, thereby causing the surrounding gas to flow rapidly, and the transformer body 1 is a huge heat source. At this time, the rapid flow of gas can cause the surrounding relatively low temperature gas to come to the transformer body 1 and the heat sink 101, and the transformer body 1 can be cooled through the heat exchange. After the temperature drops, the rotating plate 4 can be reset. Specifically, a servo motor can be used to facilitate reset. To sense the change in the internal temperature of the transformer, a temperature sensor is required. The specific installation position of the temperature sensor is the prior art and is not shown in the figure.

[0040] During this process, the telescopic cylinder 201 can be started to adjust the distance between the rotating plate 4 and the transformer body 1. In the initial state, there is a large gap between the rotating plate 4 and the transformer body 1. If the temperature of the transformer body 1 remains high, the distance between the rotating plate 4 and the transformer body 1 can be reduced to reduce the distance of the airflow to the transformer body 1, thereby reducing the energy effect and improving the heat dissipation effect. It should be noted that the rotating plate 4 cannot be too close to the transformer body 1, otherwise there will be rotation interference;

[0041] After using for a period of time, especially in the northwest region, there is a lot of dust in the environment. At this time, the dust is very easy to adhere to the heat sink 101. At this time, the auxiliary plate 5 can be rotated synchronously by rotating the telescopic rod 401, and then the auxiliary plate 5 initially horizontal to the rotating plate 4 is rotated until it rotates to be perpendicular to the rotating plate 4. At this time, the state is as follows Figure 8 As shown, the air pump 6 is started at this time, and the air pump 6 will generate pressurized gas, which enters the pneumatic rotating shaft 502. The pneumatic rotating shaft 502 is an existing conventional device, and can adopt a pneumatic head shaft of the brand Zhan Deli and the model QDZ. The internal cylinder is activated by the entry of gas, and then the rotating shaft itself is rotated, and the excess gas will be discharged through the exhaust port. The device sets the exhaust port at the rotating shaft. If the exhaust port is not selected at the rotating shaft, it can also be connected separately through a pipeline to connect the exhaust port with the inner tube 5011. When the pneumatic rotating shaft 502 rotates At this time, the extension plate 501 will be rotated out of the auxiliary plate 5. At this time, the auxiliary plate 5 is moved close to the heat sink 101 by the telescopic cylinder 201 until it is located between the two groups of heat sinks 101. At this time, the air pump 6 is still in working state. At this time, the gas will be discharged through the air outlet 503, contacting the side walls of the heat sink 101 on both sides, and then cleaning them. At this time, the best state is that the extension plate 501 is against the base of the heat sink 101, and the telescopic cylinder 201 is slowly reset to drive the air outlet 503 to move, so as to effectively clean both sides of the heat sink 101 from beginning to end;

[0042] The air pump 6 can be used to perform the air blowing cleaning function, and the heat sink 101 can also be cooled. If it is hot in summer, and the transformer body 1 is generally installed outdoors, the temperature is high at this time, and the above method can be used to cool the heat sink 101 by blowing air;

[0043] The device can use a wind sensor to increase the scope of use. The specific wind sensor can be installed on the support rod of the enclosure 2. The ball seat originally used for decoration can be replaced with a wind sensor to sense the surrounding wind direction. At this time, when there is wind outside, if the wind blows directly to one side of the enclosure 2, the telescopic rod 401 on this side is activated, so that the auxiliary plate 5 originally horizontal with the rotating plate 4 is perpendicular to the rotating plate 4. At this time, the external wind energy directly enters the enclosure 2 to cool the transformer body 1 without rotating it, thereby reducing energy consumption;

[0044] Specifically, if the external wind direction is sensed by a wind sensor, but the cooling effect of only the external wind is poor, or the wind is an inclined wind, then according to the wind direction, the auxiliary plate 5 is no longer perpendicular to the rotating plate 4, but perpendicular to the wind direction, and the rotating plate 4 is rotated by the motor 301. If the rotating plate 4 rotates in the direction against the wind at this time, the fan can be effectively brought into the enclosure 2 to improve the cooling effect.

[0045] Embodiment 2:

[0046] Reference Figure 8 , Fig. 9 , Fig.10 , an oil-immersed special transformer with a protective structure and a protective device, which are basically the same as Example 1, and further: an inflatable airbag 504 is fixedly connected to both sides of an extension plate 501 away from one end of a pneumatic shaft 502, and the inflatable airbag 504 can expand through the gas outlet 503, and then approach until it is against the side wall of the heat sink 101, and a plurality of groups of jet ports 505 are opened on the side wall of the inflatable airbag 504, and the jet ports 505 are used to spray gas to loosen the dust on the side wall of the heat sink 101, and a connecting pipe 602 is connected to the outlet end of the outlet pipe 601, and the connecting pipe 602 passes through the bevel gear 2 304 and the gear member 403, and is communicated with the air inlet end of the pneumatic shaft 502.

[0047] Specifically, when cleaning the inside of the heat sink 101, two additional sets of inflatable airbags 504 can be installed. After the gas enters the inside, the inflatable airbags 504 will expand rapidly and then extend to the outside on both sides until they are against the side of the heat sink 101. Fig.10 As shown, air jets 505 are provided on both sides of the inflatable airbag 504. When the inflatable airbag 504 is against the inner wall of the heat sink 101, the air jets 505 will also eject gas. At this time, the air jets 505 will loosen the uncleaned dust or perform secondary cleaning on the cleaned heat sink 101. At the same time, as the telescopic cylinder 201 is extended and retracted, the inflatable airbag 504 will clean the side wall of the heat sink 101 by friction. This process can be repeated many times to effectively remove dust and improve the heat exchange effect of the heat sink 101.

[0048] Embodiment 3:

[0049] Reference Figure 1 , Figure 2 , an oil-immersed special transformer and a protective device with a protective structure, which are basically the same as Example 2, and further: a rotating wheel 305 is rotatably connected to the bottom of the moving column 3, and the rotating wheel 305 is rollingly connected to the enclosure 2.

[0050] By setting the rotating wheel 305, when the telescopic cylinder 201 is telescoped to drive the movable column 3 to move, friction can be reduced, movement is facilitated, and damage to the bottom of the movable column 3 caused by friction can be reduced, which is convenient for long-term use.

[0051] The present invention uses a position-adjustable and rotatable rotating plate 4. When the temperature is high and ventilation is required, ventilation and heat dissipation can be achieved by rotating the rotating plate 4, while reducing the entry of external debris and playing a protective role. When not rotating, the gap between the rotating plates 4 is small and can still play a protective role.

[0052] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An oil-immersed special transformer with a protective structure, comprising a transformer body (1), wherein a heat sink (101) is arranged on the side of the transformer body (1), characterized in that: Also includes: Four groups of telescopic cylinders (201) are all fixedly connected to the bottom of the transformer body (1), and the telescopic ends of the four groups of telescopic cylinders (201) are respectively directed toward the four sides of the transformer body (1); Four groups of movable columns (3) are respectively fixedly connected to the telescopic ends of the telescopic cylinder (201); A plurality of groups of rotating plates (4) are rotatably connected to the movable column (3) at equal intervals to dissipate heat around the transformer body (1); the telescopic cylinder (201) is used to adjust the distance between the rotating plates (4) and the transformer body (1); A plurality of groups of auxiliary plates (5) are rotatably connected to the rotating plate (4) at equal intervals, and the distance between the side edge of the auxiliary plate (5) and the central rotation axis of the other auxiliary plates (5) on both sides thereof is adjusted by rotating the auxiliary plate (5); A pneumatic rotating shaft (502) is fixedly connected inside the auxiliary plate (5), an extension plate (501) is rotatably connected to the auxiliary plate (5), the extension plate (501) is fixedly connected to the rotating end of the pneumatic rotating shaft (502), an air pump (6) is arranged at the bottom of the transformer body (1), an air outlet end of the air pump (6) is connected to an air outlet pipe (601), and the air outlet pipe (601) is communicated with the pneumatic rotating shaft (502) for driving the rotation of the pneumatic rotating shaft (502); An inner tube (5011) is arranged inside the extension plate (501), and a plurality of groups of air outlets (503) are symmetrically provided on the side of the extension plate (501) away from one end of the pneumatic rotating shaft (502), the inner tube (5011) is in communication with the air outlet end of the pneumatic rotating shaft (502), and the inner tube (5011) is in communication with the air outlet (503), and the air outlets (503) on both sides of the extension plate (501) can be moved between the heat sinks (101) by the cooperation of the telescopic cylinder (201) and the air pump (6), so that both sides of the heat sink (101) can be cleaned by airflow.

2. The oil-immersed special transformer with a protective structure according to claim 1, characterized in that: A motor (301) is fixedly connected to the side of the moving column (3), a transmission rod (302) is rotatably connected inside the moving column (3), the transmission rod (302) is fixedly connected to the output end of the motor (301), the rotating end of the bottom of the rotating plate (4) passes through the moving column (3), and a bevel gear 2 (304) is fixedly connected to the rotating end, and a bevel gear 1 (303) matching the bevel gear 2 (304) is fixedly connected to the transmission rod (302) at equal intervals, and the bevel gear 1 (303) is meshingly connected to the bevel gear 2 (304).

3. The oil-immersed special transformer with a protective structure according to claim 2, characterized in that: A telescopic rod (401) is fixedly connected inside the rotating plate (4), a rack (402) is slidably connected inside the rotating plate (4), the rack (402) is fixedly connected to the telescopic end of the telescopic rod (401), the rotating end at the bottom of the extension plate (501) passes through the rotating plate (4), and a gear member (403) is fixedly connected to the rotating end, and the gear member (403) is meshingly connected to the rack (402).

4. The oil-immersed special transformer with a protective structure according to claim 1, characterized in that: An inflatable airbag (504) is fixedly connected to both sides of one end of the extension plate (501) away from the pneumatic shaft (502); the inflatable airbag (504) can expand when gas enters, and then approach until it abuts against the side wall of the heat sink (101); the side wall of the inflatable airbag (504) is provided with a plurality of groups of air jets (505); the air jets (505) are used to eject gas to loosen dust on the side wall of the heat sink (101).

5. The oil-immersed special transformer with a protective structure according to claim 3, characterized in that: The air outlet end of the air outlet pipe (601) is connected to a connecting pipe (602), and the connecting pipe (602) passes through the second bevel gear (304) and the gear member (403), and is communicated with the air inlet end of the pneumatic rotating shaft (502).

6. A protective device, comprising the oil-immersed special transformer with a protective structure according to claim 5, and further comprising an enclosure (2), wherein the transformer body (1) is fixedly connected to the enclosure (2), characterized in that: Both groups of movable columns (3) are slidably connected inside the enclosure (2).

7. The protection device according to claim 6, characterized in that: The bottom of the movable column (3) is rotatably connected to a rotating wheel (305), and the rotating wheel (305) is rollingly connected to the enclosure (2).

8. The protection device according to claim 7, characterized in that: The telescopic cylinder (201) and the air pump (6) are both fixedly connected to the enclosure (2), and the air outlet pipe (601) is a telescopic hose.

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