Anti-cracking high-heat-dissipation epoxy resin dry-type transformer

Abstract

The invention provides an anti-cracking high-heat-dissipation epoxy resin dry-type transformer. The anti-cracking high-heat-dissipation epoxy resin dry-type transformer comprises a transformer body, the flow guide plate is spirally arranged in the transformer body and is used for uniformly guiding air flow in gaps in the transformer body; the heat dissipation pipe is arranged on the outer side of the flow guide plate and used for absorbing heat and cooling internal gaps of the transformer body; the liquid tank is communicated with the heat dissipation pipe through a pump body, and the liquid tank is filled with cooling liquid and used for bringing out the heat absorbed by the heat dissipation pipe for heat dissipation; the fan is rotatably and adjustably arranged on the outer side of the transformer body and is used for uniformly blowing and exhausting air to the transformer body for heat dissipation; the adjusting assembly is in transmission connection with the draught fan and used for driving the draught fan to rotate and adjust the air blowing and exhausting angle of the transformer body. Through the spiral design of the guide plate and the adjustment of the angle of the fan, the uniformity of airflow and heat dissipation in the transformer is realized.

Description

Technical Field

[0001] This invention relates to the field of dry-type transformer technology, and in particular to a crack-resistant, high-heat-dissipation epoxy resin dry-type transformer. Background Technology

[0002] Dry-type transformers are important electrical equipment in power systems and are widely used in various applications. Epoxy resin dry-type transformers hold an important position in the market due to their excellent insulation properties, flame retardant properties, and mechanical strength.

[0003] Currently, most existing dry-type transformers use stationary fans for ventilation and heat dissipation. In this method, stationary fans have difficulty effectively guiding and discharging airflow into the gap between the high-voltage and low-voltage windings. Due to the narrow structural gap between the high-voltage and low-voltage windings, the airflow generated by the stationary fan is easily obstructed during propagation and cannot penetrate deep into the gap between the high-voltage and low-voltage windings, resulting in heat accumulation inside the high-voltage and low-voltage windings and poor heat dissipation.

[0004] On the other hand, fixed fans cannot evenly dissipate heat from dry-type transformers. This results in inconsistent airflow impact and heat dissipation intensity across different parts of the transformer, causing uneven heat dissipation in certain areas. Prolonged exposure to this uneven heat dissipation environment leads to significant temperature differences between different parts of the transformer, generating thermal stress. Under repeated thermal stress, epoxy resin materials are prone to developing microcracks. As usage time increases, these microcracks gradually expand, eventually causing the transformer to crack, severely impacting its safe operation and service life. Furthermore, fixed heat dissipation structures lack flexibility and adaptability, making it difficult to dynamically adjust to different operating conditions and environmental factors, further limiting the improvement of their heat dissipation performance. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the existing technology. The present invention proposes a crack-resistant, high heat dissipation epoxy resin dry-type transformer.

[0006] To address the aforementioned issues, most existing dry-type transformers employ fixed fans for ventilation and heat dissipation. However, in this method, fixed fans struggle to effectively guide and discharge airflow into the gap between the high- and low-voltage windings. Due to the narrow structural gap between the high- and low-voltage windings, the airflow generated by the fixed fan is easily obstructed during propagation, failing to penetrate deep into the gap. This results in heat accumulation inside the high- and low-voltage windings, leading to poor heat dissipation.

[0007] On the other hand, fixed fans cannot evenly dissipate heat from dry-type transformers. This results in inconsistent airflow impact and heat dissipation intensity across different parts of the transformer, causing uneven heat dissipation. Prolonged exposure to this uneven heat dissipation environment leads to significant temperature differences within the transformer, generating thermal stress. Under repeated thermal stress, epoxy resin materials are prone to microcracks. These microcracks gradually expand over time, eventually causing the transformer to crack, severely impacting its safe operation and service life. Furthermore, fixed heat dissipation structures lack flexibility and adaptability, making dynamic adjustments difficult based on different operating conditions and environmental factors, further limiting the technical challenges of improving heat dissipation performance. The technical solution adopted in this invention is: A crack-resistant, high-heat-dissipation epoxy resin dry-type transformer includes: a transformer body; The guide plate is spirally arranged inside the transformer body to uniformly guide the airflow in the gaps inside the transformer body. A heat dissipation pipe is disposed on the outside of the guide plate and is used to absorb heat and cool down the internal gaps of the transformer body. A liquid tank is connected to the heat dissipation pipe via a pump body. The liquid tank is filled with coolant to dissipate the heat absorbed by the heat dissipation pipe. A fan, with adjustable rotation, is located on the outside of the transformer body and is used to uniformly blow air and dissipate heat from the transformer body. An adjustment component, connected to the fan drive, is used to drive the fan to rotate and adjust the blowing angle of the transformer body.

[0008] Preferably, the adjustment component includes: An adjusting shaft is rotatably mounted on the outer end of the transformer body, and an adjusting frame is provided on the outer curved surface of the adjusting shaft. A fan is located in the middle of the adjusting frame. An extension rod is provided on the outside of the adjusting shaft and is used to drive the adjusting shaft to rotate; The power mechanism is connected to the extension rod and is used to synchronously drive the extension rod to swing, thereby driving the fan angle adjustment.

[0009] Preferably, the power mechanism includes a rotating shaft, a positioning block, a connecting rod, and a second motor. The rotating shaft is rotatably disposed on the outside of the transformer body. The two ends of the rotating shaft are respectively provided with a first thread and a second thread, and the first thread and the second thread face opposite directions. The positioning block is threadedly connected to the first thread and the second thread, respectively. The connecting rod is rotatably disposed on the upper end of the positioning block, and the upper end of the connecting rod is rotatably connected to the upper end of the extension rod. The second motor is driven by the rotating shaft and is used to drive the rotating shaft to rotate.

[0010] Preferably, the outer side of the second motor is keyed to a first synchronous pulley, the outer end of the first synchronous pulley is connected to a second synchronous pulley via a synchronous belt drive, and the second synchronous pulley is keyed to the middle of the rotating shaft.

[0011] Preferably, a slide rail is provided on the outer side of the transformer body, and a slider is slidably connected to the outer side of the slide rail, and the slider is connected to the inner side of the positioning block. Limiting rings for blocking and limiting the positioning block are respectively provided on the outer curved surfaces at both ends of the rotating shaft.

[0012] Preferably, the transformer body includes an upper clamp, an iron core, high and low voltage windings, and a lower clamp. The iron core is made of stacked cold-rolled silicon steel sheets with high magnetic permeability. The iron core is fixedly clamped by the upper clamp and the lower clamp. The high and low voltage windings are formed by winding copper strips layer by layer at the outer end of the iron core to form a multi-layer cylindrical structure. The high and low voltage windings are provided with longitudinal gaps according to heat dissipation requirements.

[0013] Preferably, the upper end of the upper clamp and the lower end of the lower clamp are respectively provided with a lower crossbeam and an upper crossbeam for supporting the entire transformer body. Temperature sensors for monitoring the internal temperature of the transformer body are distributed inside the transformer body, and the temperature sensors are adapted to controllers.

[0014] Preferably, a skeleton is embedded in the internal gap between the high and low voltage windings, and the skeleton is distributed in a ring shape at the upper and lower ends of the internal gap between the high and low voltage windings. The upper and lower openings of the heat dissipation pipe are respectively connected to a liquid inlet and a liquid outlet.

[0015] Preferably, the outer end of the liquid tank is provided with a plurality of heat dissipation fins to increase the heat dissipation area of ​​the liquid tank, the upper end of the liquid tank is connected to a first circulation pipe, the upper end of the first circulation pipe is provided with a first circulation port, and the upper end of the first circulation port is connected to the liquid outlet through a pipe, the pump body is connected to the outer side of the lower end of the liquid tank, the upper end of the pump body is connected to a second circulation pipe, the upper end of the second circulation pipe is provided with a second circulation port, and the upper end of the second circulation port is connected to the liquid inlet through a pipe.

[0016] Preferably, a first motor is provided on the outer side of the middle part of the liquid tank, and a stirring shaft is driven and connected to the inner side of the first motor. The stirring shaft is horizontally rotatably connected to the middle part of the liquid tank, and the outer curved surface of the stirring shaft is provided with stirring blades for stirring the coolant inside the liquid tank.

[0017] Compared with the prior art, the beneficial effects of the present invention are: This invention constructs a multi-dimensional heat dissipation system combining coolant circulation, agitation, and ventilation. The coolant flows within the heat dissipation pipes, directly absorbing heat generated by the high and low voltage windings, and dissipates this heat to the coolant tank through the circulation system. The agitation device accelerates coolant mixing, preventing localized overheating. The ventilation system further accelerates airflow, promoting overall heat dissipation. This multi-dimensional heat dissipation method significantly improves heat dissipation efficiency, ensuring stable operation of the transformer under various load conditions and effectively reducing faults and downtime caused by overheating. This invention achieves uniform airflow and heat dissipation within the transformer through the spiral design of the guide plate and the adjustment of the fan angle. The guide plate directs airflow to evenly cover the inner surfaces of the high and low voltage windings, ensuring balanced heat dissipation across all parts of the windings. The fan angle can be adjusted according to actual needs, ensuring that all parts of the transformer receive sufficient heat dissipation, avoiding localized overheating and cracking caused by uneven heat dissipation, and extending the transformer's service life. Attached Figure Description

[0018] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts. Wherein: Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a partial structural diagram at point A of the present invention; Figure 4 This is a partial structural diagram at point B of the present invention; Figure 5 This is a cross-sectional view of the overall structure of the present invention; Figure 6 This is a partial cross-sectional view of the present invention; Figure 7 This is a partial cross-sectional view of point C in the present invention.

[0019] Reference numerals: 1. Transformer body; 101. Upper clamp; 102. Iron core; 103. High and low voltage windings; 104. Lower clamp; 2. Frame; 201. Guide plate; 202. Heat dissipation pipe; 203. Liquid inlet; 204. Liquid outlet; 3. Lower crossbeam; 301. Adjusting shaft; 302. Adjusting frame; 303. Fan; 304. Extension rod; 4. Upper crossbeam; 401. Rotating shaft; 402. First thread; 403. Second thread; 4 04. Positioning block; 405. Slide rail; 406. Slider; 407. Limiting ring; 408. Connecting rod; 409. Second motor; 410. First synchronous pulley; 411. Second synchronous pulley; 5. Liquid tank; 501. Heat dissipation fins; 502. First circulation pipe; 503. First circulation port; 504. Pump body; 505. Second circulation pipe; 506. Second circulation port; 507. First motor; 508. Stirring shaft; 509. Stirring blade. Detailed Implementation

[0020] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0021] Specific embodiments of the present invention are described below with reference to the accompanying drawings.

[0022] Please see Figure 1 - Figure 7 This embodiment proposes a crack-resistant, high-heat-dissipation epoxy resin dry-type transformer, including a transformer body 1, which is mainly composed of an upper clamp 101, an iron core 102, high and low voltage windings 103 and a lower clamp 104.

[0023] Figure 1 , 2 The core 102 is the magnetic circuit part of the transformer body 1, and is made of stacked cold-rolled silicon steel sheets with high magnetic permeability. This material choice makes the core 102 highly efficient in transmitting and converting electromagnetic energy, effectively reducing energy loss. The core 102 is fixedly clamped by the upper clamp 101 and the lower clamp 104. This fixing method ensures the structural stability of the transformer during operation and prevents the core 102 from loosening due to vibration or external forces, thus affecting the transformer's performance.

[0024] The high and low voltage windings 103 use copper strip (foil) as the conductive material, and are wound layer by layer at the outer end of the iron core 102 to form a multi-layer cylindrical structure. This winding method not only ensures the tightness of the windings but also enables uniform current distribution, reducing local overheating. After winding, epoxy resin is poured into and cured in a vacuum to form a high-strength fiberglass structure. This structure not only provides excellent electrical insulation performance but also provides mechanical protection for the windings, preventing damage during transportation, installation, or operation. Simultaneously, to meet heat dissipation requirements, the high and low voltage windings 103 are provided with longitudinal gaps, which provide channels for air circulation and help dissipate the heat generated by the windings.

[0025] Figure 5 , 7 A frame 2 is embedded in the internal gap of the high and low voltage windings 103. The frame 2 is distributed in a ring shape at the upper and lower ends of the internal gap of the high and low voltage windings 103. A guide plate 201 is coupled and installed inside the frame 2. The guide plate 201 is distributed in a spiral shape inside the high and low voltage windings 103. This spiral design can guide the airflow in the internal gap of the high and low voltage windings 103, so that the airflow evenly covers the entire inner surface of the high and low voltage windings 103, thereby improving the heat dissipation efficiency. A heat pipe 202 is coupled and installed outside the guide plate 201. The heat pipe 202 is also distributed in a spiral shape inside the high and low voltage windings 103. The upper and lower openings of the heat pipe 202 are respectively connected to the liquid inlet 203 and the liquid outlet 204, through which coolant can be discharged into and discharged into the heat pipe 202.

[0026] When the coolant flows inside the heat dissipation pipe 202, it can carry away the heat generated in the gap between the high and low voltage windings 103, achieving effective heat dissipation. The frame 2, the guide plate 201, and the heat dissipation pipe 202 are all made of highly thermally conductive insulating materials, such as ceramic materials. This material has both good thermal conductivity and ensures electrical insulation safety.

[0027] Figure 2 , 6 The upper end of the upper clamp 101 and the lower end of the lower clamp 104 are respectively bolted to the lower crossbeam 3 and the upper crossbeam 4, which support the transformer body 1 as a whole. A liquid tank 5 is bolted to the upper end of the lower crossbeam 3, and the liquid tank 5 is filled with coolant for heat dissipation. Several heat dissipation fins 501 are welded or integrally formed on the outer end of the liquid tank 5, and these fins are symmetrically distributed around the outer end of the liquid tank 5. This design increases the heat dissipation area of ​​the liquid tank 5, enabling it to dissipate the heat absorbed by the coolant to the surrounding environment more quickly. A first circulation pipe 502 is welded to the upper end of the liquid tank 5, and a first circulation port 503 is opened at the upper end of the first circulation pipe 502. The upper end of the first circulation port 503 is connected to the outlet 204 via a pipe.

[0028] The coolant inside the radiator pipe 202 can be discharged into the coolant tank 5 through the first circulation port 503 and the first circulation pipe 502. A pump body 504 is welded to the lower outer side of the coolant tank 5, and a second circulation pipe 505 is welded to the upper outlet of the pump body 504. A second circulation port 506 is provided at the upper end of the second circulation pipe 505, and the upper end of the second circulation port 506 is connected to the inlet port 203 via a pipe. Through the second circulation port 506 and the second circulation pipe 505 in conjunction with the pump body 504, the coolant inside the coolant tank 5 can be pressurized and discharged into the radiator pipe 202, forming a complete coolant circulation system.

[0029] read Figure 6 A first motor 507 is fixedly mounted on the outer side of the middle of the liquid tank 5 with screws. An agitator shaft 508 is connected to the inner side of the first motor 507 via a reducer, and the agitator shaft 508 is horizontally rotatably connected to the middle of the liquid tank 5 via a rotating shaft. An agitator blade 509 for stirring the coolant inside the liquid tank 5 is welded to the outer curved surface of the middle of the agitator shaft 508. When the first motor 507 is turned on, it drives the agitator shaft 508 to rotate, which in turn drives the agitator blade 509 to stir the coolant inside the liquid tank 5. This stirring action can accelerate the mixing and flow of the coolant inside the liquid tank 5, preventing localized overheating of the coolant and affecting its heat dissipation effect.

[0030] Figure 3 , 4 The lower crossbeam 3 and the upper crossbeam 4 are respectively supported and rotatably connected to the outer ends by bearing seats with adjusting shafts 301. An adjusting frame 302 is bonded to the outer curved surface of the adjusting shaft 301. A fan 303 for blowing air and dissipating heat from the transformer body 1 is fixedly installed in the middle of the adjusting frame 302 by screws. A filter screen is fixedly installed at the air inlet of the fan 303 by screws. The filter screen can filter the air entering the fan 303 to prevent dust and other impurities from entering the fan 303 and affecting its normal operation. An extension rod 304 for swinging and adjusting the adjusting shaft 301 is bonded to the outer side of the adjusting shaft 301.

[0031] The lower crossbeam 3 and the upper crossbeam 4 are each supported by a rotating shaft 401 on their outer sides via bearing seats. The rotating shaft 401 has a first thread 402 and a second thread 403 at both ends, with the first thread 402 and the second thread 403 facing opposite directions. Positioning blocks 404 are threadedly connected to the outer curved surfaces of both ends of the rotating shaft 401. A slide rail 405 is horizontally mounted on the outer sides of the lower crossbeam 3 and the upper crossbeam 4 via screws. A slider 406 is slidably connected to the outer side of the slide rail 405, and the slider 406 is fixedly connected to the inner side of the positioning block 404 via screws. The slider 406, in conjunction with the slide rail 405, can limit the horizontal movement of the positioning block 404, preventing it from shifting during movement. Limiting rings 407 are bonded to the outer curved surfaces of both ends of the rotating shaft 401 to block and limit the positioning block 404. The upper end of the positioning block 404 is rotatably connected to the connecting rod 408 via a bearing seat, and the upper end of the connecting rod 408 is inclined outward. The upper end of the connecting rod 408 is rotatably connected to the outer side of the upper end of the extension rod 304 via a pin.

[0032] The lower crossbeam 3 and the upper crossbeam 4 are fixedly mounted with bolts on the outer side of the upper end. The outer side of the second motor 409 is keyed to the first synchronous pulley 410. The outer end of the first synchronous pulley 410 is connected to the second synchronous pulley 411 through a synchronous belt drive. The second synchronous pulley 411 is keyed to the middle of the rotating shaft 401.

[0033] Please continue reading. Figure 1 - Figure 7 Working principle: A temperature sensor is installed inside the transformer to monitor the temperature inside the transformer body 1 in real time. When the temperature inside the transformer body 1 exceeds a preset threshold, the temperature sensor transmits a signal to the controller, which then controls the pump body 504 to start upon receiving the signal.

[0034] After the pump body 504 is turned on, it pressurizes the coolant inside the liquid tank 5 and discharges it into the heat dissipation pipe 202. During the flow of the coolant inside the heat dissipation pipe 202, it absorbs the heat generated by the gaps between the high and low voltage windings 103. The heat-absorbing coolant is then discharged into the liquid tank 5 through the first circulation port 503 and the first circulation pipe 502. The coolant inside the liquid tank 5 neutralizes the temperature of the heat-absorbing coolant. Simultaneously, the heat dissipation fins 501 increase the heat dissipation area of ​​the liquid tank 5, accelerating heat dissipation and thus circulating the heat generated by the gaps between the high and low voltage windings 103 out of the transformer body 1, improving the heat dissipation efficiency inside the transformer body 1.

[0035] When pump body 504 is turned on for coolant circulation and heat dissipation, the first motor 507 can be turned on simultaneously. After the first motor 507 is turned on, it drives the stirring shaft 508 to rotate, and the stirring blades 509 on the stirring shaft 508 stir the coolant inside the tank 5. This stirring action accelerates the mixing and flow of the coolant inside the tank 5, making the coolant temperature more uniform, preventing localized overheating, and thus improving the heat dissipation effect of the coolant.

[0036] While the heat dissipation pipe 202, in conjunction with the coolant, absorbs and dissipates the heat generated in the internal gap of the high and low voltage windings 103, the fan 303 is activated. Once activated, the fan 303 blows air through the entire transformer body 1 for heat dissipation. Because the guide plates 201 are spirally distributed inside the high and low voltage windings 103, they guide the airflow within the internal gaps of the high and low voltage windings 103, ensuring the airflow evenly covers the entire inner surface of the high and low voltage windings 103, further enhancing the heat dissipation effect of the internal gaps.

[0037] To ensure uniform heat dissipation of the transformer body 1 and prevent cracking due to uneven heat dissipation over a long period, the second motor 409 can be activated. Once activated, the second motor 409 drives the first synchronous pulley 410 to rotate. The first synchronous pulley 410, via a synchronous belt, drives the second synchronous pulley 411 to rotate, which in turn drives the rotating shaft 401 to rotate. Since the first thread 402 and the second thread 403 at both ends of the rotating shaft 401 face opposite directions, the rotation of the rotating shaft 401 generates a force that causes the positioning block 404 to move synchronously outward or inward in a linear fashion. When the positioning block 404 moves, it will drive the connecting rod 408 to move outward or inward synchronously. When the connecting rod 408 moves outward or inward synchronously, it will drive the extension rod 304 to swing outward or inward synchronously. This will cause the adjusting shaft 301 to swing outward or inward synchronously through the adjusting frame 302 under the drive of the extension rod 304, thereby adjusting the blowing and exhaust angle of the fan 303 on the transformer body 1 as a whole, and realizing uniform heat dissipation of the transformer body 1.

[0038] Beneficial effects: This transformer employs a multi-dimensional cooling system combining coolant circulation, agitation, and ventilation. The coolant flows within the cooling pipes 202, directly absorbing heat generated by the high and low voltage windings 103, and dissipating this heat to the coolant tank 5 through the circulation system. The agitation device accelerates coolant mixing, preventing localized overheating. The ventilation system further enhances airflow, promoting overall heat dissipation. This multi-dimensional cooling method significantly improves heat dissipation efficiency, ensuring stable operation of the transformer under various load conditions and effectively reducing faults and downtime caused by overheating.

[0039] The spiral design of the guide plate 201 and the adjustment of the angle of the fan 303 achieve uniform airflow and heat dissipation inside the transformer. The guide plate 201 guides the airflow to evenly cover the inner surface of the high and low voltage windings 103, ensuring balanced heat dissipation in all parts of the windings; the angle of the fan 303 can be adjusted according to actual needs, ensuring that all parts of the transformer receive sufficient heat dissipation, avoiding local overheating and cracking caused by uneven heat dissipation, and extending the service life of the transformer.

[0040] Because of its high-efficiency heat dissipation performance, this transformer can operate at lower temperatures, thus reducing energy loss due to overheating. Simultaneously, the design of the coolant circulation system and stirring device maximizes energy utilization efficiency and reduces energy consumption during the heat dissipation process, meeting the requirements of energy conservation and environmental protection. The crack-resistant design and efficient heat dissipation system extend the transformer's service life, reducing maintenance and replacement costs due to equipment failure. Furthermore, stable operating performance reduces the need for auxiliary cooling equipment, further saving operating costs.

[0041] The angle of the fan 303 is adjusted by means of the second motor 409, synchronous pulley and rotating shaft 401. Users can flexibly adjust the blowing angle of the fan 303 according to the actual installation environment and usage requirements of the transformer, so as to ensure that the transformer is always in the best heat dissipation state, further improving the convenience and flexibility of use.

[0042] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A crack-resistant, high-heat-dissipation epoxy resin dry-type transformer, comprising a transformer body, characterized in that, include: The guide plate is spirally arranged inside the transformer body to uniformly guide the airflow in the gaps inside the transformer body. A heat dissipation pipe is disposed on the outside of the guide plate and is used to absorb heat and cool down the internal gaps of the transformer body. A liquid tank is connected to the heat dissipation pipe via a pump body. The liquid tank is filled with coolant to dissipate the heat absorbed by the heat dissipation pipe. A fan, with adjustable rotation, is located on the outside of the transformer body and is used to uniformly blow air and dissipate heat from the transformer body. An adjustment component, connected to the fan drive, is used to drive the fan to rotate and adjust the blowing angle of the transformer body.

2. The crack-resistant, high-heat-dissipation epoxy resin dry-type transformer according to claim 1, characterized in that, The adjustment component includes: An adjusting shaft is rotatably mounted on the outer end of the transformer body, and an adjusting frame is provided on the outer curved surface of the adjusting shaft. A fan is located in the middle of the adjusting frame. An extension rod is provided on the outside of the adjusting shaft and is used to drive the adjusting shaft to rotate; The power mechanism is connected to the extension rod and is used to synchronously drive the extension rod to swing, thereby driving the fan angle adjustment.

3. The crack-resistant, high-heat-dissipation epoxy resin dry-type transformer according to claim 2, characterized in that, The power mechanism includes a rotating shaft, a positioning block, a connecting rod, and a second motor. The rotating shaft is rotatably mounted on the outside of the transformer body. The two ends of the rotating shaft are respectively provided with a first thread and a second thread, and the first thread and the second thread face opposite directions. The positioning block is threadedly connected to the first thread and the second thread, respectively. The connecting rod is rotatably mounted on the upper end of the positioning block, and the upper end of the connecting rod is rotatably connected to the upper end of the extension rod. The second motor is driven by the rotating shaft and is used to drive the rotating shaft to rotate.

4. The crack-resistant, high-heat-dissipation epoxy resin dry-type transformer according to claim 3, characterized in that, The second motor is keyed to a first synchronous pulley on its outer side. The outer end of the first synchronous pulley is connected to a second synchronous pulley via a synchronous belt drive. The second synchronous pulley is keyed to the middle of the rotating shaft.

5. The crack-resistant, high-heat-dissipation epoxy resin dry-type transformer according to claim 4, characterized in that, A slide rail is provided on the outer side of the transformer body, and a slider is slidably connected to the outer side of the slide rail. The slider is connected to the inner side of the positioning block. Limiting rings for blocking and limiting the positioning block are respectively provided on the outer curved surfaces at both ends of the rotating shaft.

6. The crack-resistant, high-heat-dissipation epoxy resin dry-type transformer according to claim 1, characterized in that, The transformer body includes an upper clamp, an iron core, high and low voltage windings, and a lower clamp. The iron core is made of stacked cold-rolled silicon steel sheets with high magnetic permeability. The iron core is fixed and clamped by the upper clamp and the lower clamp. The high and low voltage windings are formed by winding copper strips layer by layer at the outer end of the iron core to form a multi-layer cylindrical structure. The high and low voltage windings are provided with longitudinal gaps according to heat dissipation requirements.

7. The crack-resistant, high-heat-dissipation epoxy resin dry-type transformer according to claim 6, characterized in that, The upper end of the upper clamp and the lower end of the lower clamp are respectively provided with a lower crossbeam and an upper crossbeam for supporting the entire transformer body. Temperature sensors for monitoring the internal temperature of the transformer body are distributed inside the transformer body, and the temperature sensors are adapted to controllers.

8. The crack-resistant, high-heat-dissipation epoxy resin dry-type transformer according to claim 7, characterized in that, The high and low voltage windings have a pre-embedded skeleton in the internal gap, and the skeleton is distributed in a ring shape at the upper and lower ends of the internal gap. The upper and lower openings of the heat dissipation pipe are respectively connected to the liquid inlet and the liquid outlet.

9. The crack-resistant, high-heat-dissipation epoxy resin dry-type transformer according to claim 8, characterized in that, The outer end of the liquid tank is provided with several heat dissipation fins to increase the heat dissipation area of ​​the liquid tank. The upper end of the liquid tank is connected to a first circulation pipe. The upper end of the first circulation pipe has a first circulation port, and the upper end of the first circulation port is connected to the liquid outlet through a pipe. The pump body is connected to the outer side of the lower end of the liquid tank. The upper end of the pump body is connected to a second circulation pipe. The upper end of the second circulation pipe has a second circulation port, and the upper end of the second circulation port is connected to the liquid inlet through a pipe.

10. The crack-resistant, high-heat-dissipation epoxy resin dry-type transformer according to claim 9, characterized in that, A first motor is provided on the outer side of the middle part of the liquid tank. A stirring shaft is connected to the inner side of the first motor and is horizontally rotatably connected to the middle part of the liquid tank. The outer curved surface of the stirring shaft is provided with stirring blades for stirring the coolant inside the liquid tank.

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