Compact transformer

Abstract

The invention provides a compact transformer applied to the field of transformers, the compact transformer comprises an outer cylinder, an inner cylinder and a wire core assembly, the wire core assembly comprises three groups of iron cores arranged at equal angles, the iron cores are sleeved with primary coils and secondary coils, and the outer wall of the outer cylinder is provided with cooling fins; and a circulating mechanism used for accelerating hot oil in the inner barrel to enter the outer barrel and accelerating cold oil in the outer barrel to enter the inner barrel is further arranged on the inner barrel. The problem that heat is concentrated due to the fact that adjacent coils are too close is solved, the double-bin design of the outer barrel and the inner barrel is utilized, the self-circulation efficiency of cooling oil is improved, meanwhile, the anti-seismic performance of a wire core assembly in the inner barrel is improved, the operation stability of the transformer is improved, and the transformer has market prospects and is suitable for application and popularization.

Description

Technical Field

[0001] The present application relates to the field of transformers, and in particular to a compact transformer. Background Art

[0002] In today's power system, three-phase transformers, as key power equipment, are widely used in various fields, from industrial production to daily life. The quality of their performance directly affects the stability and reliability of power supply.

[0003] The equidistant arrangement of the core and coils of traditional transformers often results in adjacent coils being too close to each other, especially the coil in the middle, which is affected by the heat radiation of the coils on both sides, resulting in serious heat concentration. As the transformer runs for a long time, the heat accumulates continuously, which will cause the internal temperature of the transformer to be too high, accelerate the aging of the insulation material, reduce the insulation performance, increase the risk of short circuit and other faults, and thus shorten the service life of the transformer and affect the normal operation of the power system.

[0004] In terms of seismic performance, the existing transformer structure lacks effective shock-absorbing measures when facing external vibrations. Vibration may cause the internal core components to shift and loosen, destroy the relative position relationship between the coil and the core, affect the electromagnetic coupling effect, reduce the working efficiency of the transformer, and even cause electrical failures, threatening the safe operation of power equipment.

[0005] Therefore, a compact transformer is proposed to solve the above problems. Summary of the invention

[0006] The purpose of the present application is to solve the technical problem of uneven heat distribution in the existing three-phase transformer layout. Compared with the existing technology, a compact transformer is provided, including an outer cylinder, an inner cylinder and a core assembly. The core assembly is encapsulated in the inner cylinder. The core assembly includes three groups of iron cores arranged at equal angles. The sides of the iron cores that are far away from each other are sleeved with primary coils, and the outer side of the primary coil is sleeved with a secondary coil;

[0007] The inner cylinder is encapsulated in the outer cylinder, the top of the outer cylinder is provided with a top cover, the outer wall of the outer cylinder is provided with heat dissipation fins, the interiors of the outer cylinder and the inner cylinder are filled with cooling oil, the top and bottom of the inner cylinder are respectively provided with an upper conduit and a lower conduit, the inner cylinder is connected with the interior of the outer cylinder through the upper conduit and the lower conduit, and a one-way valve is provided in the upper conduit and the lower conduit, wherein the one-way valve on the upper conduit has a one-way conductivity to guide the hot oil in the inner cylinder to the top of the outer cylinder, and the one-way valve on the lower conduit has a one-way conductivity to guide the cold oil in the outer cylinder to the bottom of the inner cylinder;

[0008] The inner cylinder is also provided with a circulation mechanism for accelerating the hot oil in the inner cylinder to enter the outer cylinder, and accelerating the cold oil in the outer cylinder to enter the inner cylinder;

[0009] The bottom of the top cover is provided with an exhaust mechanism for accelerating the heat dissipation of the heat dissipation fins.

[0010] Furthermore, the circulation mechanism includes a central support fixed in the middle of the inner cylinder and used to separate the three groups of iron cores, the inner cylinder close to the secondary coil has an arc-shaped outer wall, an elastic plate is fixed between adjacent arc-shaped outer walls, the central support is provided with a telescopic groove between the gaps of adjacent iron cores, a partition is slidably connected in the telescopic groove, an elastic rubber belt is fixed between the partition and the telescopic groove, and the end of the partition away from the central support is fixed to the elastic plate;

[0011] An expansion wing bin is also fixed to one side of the outer wall of the elastic plate, and a connecting hole for connecting the expansion wing bin and the inner cylinder is provided on the elastic plate.

[0012] Furthermore, the elastic plate is a beryllium copper alloy plate, the thickness of the middle portion of the elastic plate is smaller than the thickness of the two sides thereof, and the wall thickness of the expansion wing bin is smaller than the minimum wall thickness of the elastic plate;

[0013] The elastic rubber belt is a heat-vulcanized silicone rubber structure, and the elastic rubber belt has an elastic force that drives the partition plate to approach the central support.

[0014] Furthermore, three groups of elastic rubber columns evenly distributed at equal angles are fixed to the top and the bottom of the inner cylinder, and the elastic rubber columns have elastic force to drive the inner cylinder away from the inner wall of the outer cylinder.

[0015] Furthermore, the exhaust mechanism includes a base fixed to the bottom of the outer cylinder;

[0016] An air bin is provided in the base, a fan is fixed at the bottom of the base, the output end of the fan extends into the air bin and is fixed with an exhaust drum, the output end of the air bin is connected with an exhaust duct, the output end of the exhaust duct extends to the bottom of the heat dissipation fins, the input end of the air bin is connected with an air inlet duct, and a one-way diaphragm is fixed at the connecting node between the air inlet duct and the air bin.

[0017] Furthermore, the plurality of air inlet ducts are evenly arranged at equal angles, the input end cross-section of the air inlet duct is larger than the output end cross-section, and the inner cavity of the air inlet duct is in the shape of a quadrangular pyramid;

[0018] The plurality of exhaust ducts are evenly arranged at equal angles, the number of the exhaust ducts is arranged one-to-one with the number of the heat dissipation fins, and the output end of the exhaust duct is arranged vertically upward.

[0019] Furthermore, a cover cylinder is provided between the base and the top cover, the bottom of the top cover is rotatably connected to a rotating ring seat, the outer wall of the rotating ring seat is evenly provided with a plurality of limit slide grooves at equal angles, the top of the cover cylinder is provided with a limit slider matching the limit slide groove, and the cover cylinder is slidably connected to the outer side of the rotating ring seat in a vertical direction through the limit slider and the limit slide groove;

[0020] The cover tube is provided with a plurality of opening slots evenly spaced at equal angles, and self-driving blades are rotatably connected in the opening slots. The rotating ring seat is provided with an opening and closing mechanism for driving the self-driving blades to open or close synchronously;

[0021] The rotating ring seat is also provided with a plurality of inner air outlets which are evenly distributed at equal angles, and the top of the cover tube is provided with outer air outlets corresponding to the inner air outlets.

[0022] Furthermore, the opening and closing mechanism includes a rotating shaft that rotatably connects one side of the self-driving blade to the open groove, the top of the rotating shaft extends through the cover tube and is provided with two sets of spiral grooves, the bottom of the rotating ring seat is provided with an adjustment sleeve corresponding to the rotating shaft, and the adjusting sleeve is provided with a ball corresponding to the spiral groove;

[0023] A tension spring is clamped between the top of the cover tube and the rotating ring seat, and an air guide cone ring is provided at the bottom of the cover tube. A sealing magnetic strip is fixed to the inner bottom of the air guide cone ring, and an electromagnetic ring that matches the sealing magnetic strip is provided at the top of the base.

[0024] Furthermore, the tension spring has an elastic force that drives the cover tube as a whole to move upward and close to the top cover. When the tension spring is in a free state, the sealing magnetic strip moves upward with the cover tube and away from the electromagnetic ring. At this time, the outer exhaust port and the inner exhaust port are staggered and closed.

[0025] The electromagnetic ring has magnetic attraction to the sealing magnetic strip when power is on, and an anemometer and a wiring terminal are fixed on the top of the top cover.

[0026] Furthermore, a power generation device is also provided in the rotating ring seat, and the power generation device includes a power generation rotor fixed on the inner side of the rotating ring seat ring, and the power generation rotor is rotatably connected to the outer side of the circumference of the top cover. The top of the top cover is provided with a power generation stator matching the power generation rotor. The top of the top cover is also provided with a battery and a control unit. The output end of the power generation device is rectified by a rectifier and transmitted to the input end of the battery. The battery, anemometer and electromagnetic ring are all electrically connected to the control unit through wires.

[0027] Compared with the prior art, the advantages of this application are:

[0028] The present invention solves the problem of heat concentration caused by the close distance between adjacent coils through the design of three groups of iron cores arranged at equal angles, under the premise of making the arrangement spacing of the wire core components in the inner cylinder more compact. The double-bin design of the outer cylinder and the inner cylinder is utilized to improve the self-circulation efficiency of the cooling oil and increase the seismic performance of the wire core components inside the inner cylinder. In terms of switching the heat dissipation mode, according to the external wind speed detected by the anemometer and weather conditions such as whether it is raining, the control unit controls the power on or off of the electromagnetic ring to realize the opening or closing of the self-driven blades, and then automatically switches the heat dissipation mode, making full use of natural wind heat dissipation or starting the fan for forced heat dissipation. At the same time, it can also realize power generation and energy storage when the wind is strong, effectively improving the heat dissipation efficiency of the heat dissipation fins and improving the operating stability of the transformer. It has market prospects and is suitable for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of this application;

[0030] Figure 2 This is a schematic diagram of the explosion structure of this application;

[0031] Figure 3 It is a schematic diagram of the explosion structure of the inner cylinder and the outer cylinder proposed in this application;

[0032] Figure 4 It is a schematic diagram of the exploded structure of the inner cylinder and the wire core assembly proposed in this application;

[0033] Figure 5 It is a schematic diagram of the exploded structure of the wire core assembly proposed in this application;

[0034] Figure 6 It is a schematic diagram of the transverse cross-sectional structure of the inner cylinder and the outer cylinder proposed in this application;

[0035] Figure 7 for Figure 6 A is a schematic diagram of the enlarged structure of the middle part;

[0036] Figure 8 This is a schematic diagram of the transverse cross-sectional structure of the present application;

[0037] Fig. 9 This is a schematic diagram of the longitudinal cross-sectional structure of the present application;

[0038] Fig.10 for Fig. 9 A schematic diagram of the enlarged structure of the middle B part;

[0039] Fig.11 for Fig. 9 The enlarged structural diagram of the middle C part;

[0040] Fig.12 It is a schematic diagram of the structure of the base and the outer cylinder proposed in this application;

[0041] Fig.13 This is a schematic diagram of the closed state of the self-driving blade proposed in this application;

[0042] Fig.14 This is a schematic diagram of the state of the self-driving blade proposed in this application when it is opened;

[0043] Fig.15 This is a schematic diagram of the structure of the exhaust drum proposed in this application.

[0044] Description of the numbers in the figure:

[0045] 1. Cover; 11. Self-driving blades; 111. Rotating shaft; 112. Spiral groove; 12. Wind guide cone ring; 121. Sealing magnetic strip; 13. External air outlet; 14. Limiting slider; 2. Base; 201. Electromagnetic ring; 202. Wind bin; 21. Air inlet; 22. Air outlet; 3. Top cover; 31. Anemometer; 32. Terminal block; 33. Tension spring; 34. Battery; 35. Generator stator; 4. Outer cylinder; 41. Heat dissipation fins; 5. Inner cylinder; 501. Elastic rubber column; 51, elastic plate; 511, connecting hole; 52, expansion wing bin; 53, upper duct; 54, lower duct; 55, partition; 551, elastic rubber belt; 56, center bracket; 561, telescopic slot; 6, wire core assembly; 61, iron core; 62, secondary coil; 63, primary coil; 7, rotating ring seat; 71, limiting slide slot; 72, inner exhaust port; 73, adjusting sleeve; 74, generator rotor; 8, fan; 81, exhaust drum; 82, one-way diaphragm. DETAILED DESCRIPTION

[0046] The embodiments will be combined with the drawings in the specification to clearly and completely describe the technical solution of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making any creative work shall fall within the scope of protection of the present application.

[0047] Example:

[0048] The present invention provides a compact transformer, see Figure 1 - Fig.15 , including an outer cylinder 4, an inner cylinder 5 and a core assembly 6. The core assembly 6 is encapsulated in the inner cylinder 5. The core assembly 6 includes three groups of iron cores 61 arranged at equal angles. The sides of the iron cores 61 that are far away from each other are sleeved with primary coils 63, and the outer side of the primary coil 63 is sleeved with a secondary coil 62. The conversion of electric energy is achieved through the principle of electromagnetic induction.

[0049] Compared with the equidistant arrangement of the traditional iron cores, the present application arranges the iron cores 61 at equal angles, which solves the problem of heat concentration caused by adjacent coils being too close to each other;

[0050] For details, please refer to Figure 2 - Figure 6 The inner cylinder 5 is encapsulated in the outer cylinder 4, and a unique double-chamber structure is formed between the two. A top cover 3 is provided on the top of the outer cylinder 4, and the top cover 3 is assembled on the top of the outer cylinder 4 through a bolt structure to encapsulate the inner cylinder 5. In order to improve the heat dissipation performance of the outer cylinder 4, a plurality of heat dissipation fins 41 are provided on the outer wall of the outer cylinder 4, which increases the heat dissipation area and improves the heat dissipation efficiency. The interiors of the outer cylinder 4 and the inner cylinder 5 are filled with cooling oil. In order to prevent direct exchange between the outer cylinder 4 and the inner cylinder 5, an insulation layer is also provided on the outer wall of the inner cylinder 5 to prevent the heat of the inner cylinder 5 from being directly radiated to the outer cylinder 4. In order to ensure the temperature gradient of the cooling oil, it is beneficial to the circulation of the cooling oil. Furthermore, a plurality of upper conduits 53 and lower conduits 54 are respectively provided at the top and bottom of the inner cylinder 5. The inner cylinder 5 is connected to the interior of the outer cylinder 4 through the upper conduits 53 and the lower conduits 54. Both the upper conduits 53 and the lower conduits 54 are provided with one-way valves. The one-way valve on the upper conduit 53 has one-way conductivity to guide the hot oil in the inner cylinder 5 to the top of the outer cylinder 4. The one-way valve on the lower conduit 54 has one-way conductivity to guide the cold oil in the outer cylinder 4 to the bottom of the inner cylinder 5, thereby realizing the one-way circulation of the cooling oil.

[0051] In order to further improve the circulation efficiency of the cooling oil between the outer cylinder 4 and the inner cylinder 5 , the inner cylinder 5 is also provided with a circulation mechanism for accelerating the hot oil in the inner cylinder 5 to enter the outer cylinder 4 and accelerating the cold oil in the outer cylinder 4 to enter the inner cylinder 5 .

[0052] For details, please refer to Figure 6 - Figure 7 The circulation mechanism includes a central bracket 56 fixed in the middle of the inner cylinder 5 and used to separate the three groups of iron cores 61. The inner cylinder 5 has an arc-shaped outer wall on one side close to the secondary coil 62. An elastic plate 51 is fixed between adjacent arc-shaped outer walls. In order to keep the elastic plate 51 from being easily reduced in elasticity due to metal fatigue effect during long-term deformation, the elastic plate 51 is made of beryllium copper alloy plate, which has the advantages of high fatigue strength, small elastic hysteresis and corrosion resistance, and is suitable for use in a cooling oil environment. In addition, the middle thickness of the elastic plate 51 is less than the thickness on both sides, which further improves its elastic performance.

[0053] The center bracket 56 is provided with a telescopic groove 561 between the gaps of the adjacent iron cores 61, and a partition 55 is slidably connected in the telescopic groove 561. An elastic rubber belt 551 is fixed between the partition 55 and the telescopic groove 561. It should be noted that the elastic rubber belt 551 is a heat-vulcanized silicone rubber structure, so that the elastic rubber belt 551 has corrosion resistance and fatigue resistance. Specifically, the elastic rubber belt 551 has an elastic force that drives the partition 55 to approach the center bracket 56, and one end of the partition 55 away from the center bracket 56 is fixed to the elastic plate 51;

[0054] When the temperature of the cold oil shortage in the inner cylinder 5 increases, the volume of the cold oil shortage increases according to the effect of thermal expansion and contraction, thereby pushing the elastic plate 51 to deform elastically outward. At the same time, the elastic force of the elastic rubber band 551 decreases due to the heat, causing the elastic plate 51 to lose the traction of the partition 55, and then use its own elastic force to deform outward. The outward deformation of the elastic plate 51 reduces the volume of the outer cylinder 4, thereby unidirectionally expelling the low-temperature cooling oil at the bottom of the outer cylinder 4 into the inner cylinder 5 through the lower conduit 54. When the temperature of the cooling oil in the inner cylinder 5 is reduced, the elastic rubber band 551 restores its elasticity, thereby pulling the partition 55 and the elastic plate 51 to reset. As the volume of the inner cylinder 5 decreases, the high-temperature cooling oil at the top of the inner cylinder 5 is unidirectionally expelled into the outer cylinder 4 through the upper conduit 53. At this time, the cooling oil temperatures inside and outside the outer cylinder 4 and the inner cylinder 5 are exchanged, completing an oil circuit cycle, and the hot cooling oil in the outer cylinder 4 is dissipated and cooled through the heat dissipation fins 41.

[0055] In addition, an expansion wing bin 52 is fixed to one side of the outer wall of the elastic plate 51. The wall thickness of the expansion wing bin 52 is less than the minimum wall thickness of the elastic plate 51. The elastic plate 51 is provided with a connecting hole 511 for connecting the expansion wing bin 52 and the inner cylinder 5. Since the expansion wing bin 52 is connected to the inner cylinder 5 through the connecting hole 511, when the hot oil in the inner cylinder 5 heats up, the expansion wing bin 52 connected to the inner cylinder 5 expands due to the increase in the temperature of the cooling oil. When the outer cylinder 4 is in a closed state, the expansion of the expansion wing bin 52 will reduce the internal volume of the outer cylinder 4, and then squeeze the low-temperature cooling oil at the bottom of the outer cylinder 4 into the inner cylinder 5 through the lower guide tube 54, thereby further improving the circulation efficiency of the cooling oil.

[0056] See also Figure 3 Three groups of elastic rubber columns 501 arranged at equal angles are fixed to the top and bottom of the inner cylinder 5. The elastic rubber columns 501 have elastic force to drive the inner cylinder 5 away from the inner wall of the outer cylinder 4. The top and bottom of the inner cylinder 5 are fixed to the upper and lower sides of the outer cylinder 4 through the elastic rubber columns 501. Since cooling oil is filled between the outer cylinder 4 and the inner cylinder 5, when external vibration occurs, the cooling oil in the outer cylinder 4 and the elastic force of the elastic rubber columns 501 themselves can effectively filter vibration fluctuations, thereby improving the seismic performance of the wire core assembly 6 inside the inner cylinder 5.

[0057] See also Figure 8 - Fig.14In order to improve the heat dissipation efficiency of the heat dissipation fins 41, an exhaust mechanism for accelerating the heat dissipation of the heat dissipation fins 41 is provided at the bottom of the top cover 3, and the exhaust mechanism includes a base 2 fixed to the bottom of the outer cylinder 4; a wind bin 202 is provided in the base 2, a fan 8 is fixed to the bottom of the base 2, the output end of the fan 8 extends into the wind bin 202 and is fixed with an exhaust drum 81, the output end of the wind bin 202 is connected with an exhaust duct 22, the output end of the exhaust duct 22 extends to the bottom of the heat dissipation fins 41, the input end of the wind bin 202 is connected with an air inlet duct 21, and a one-way diaphragm 82 is fixed at the connection node between the air inlet duct 21 and the wind bin 202;

[0058] It should be noted that a number of air inlet ducts 21 are evenly arranged at equal angles. In order to increase the air flow rate of the air inlet duct 21 input into the wind bin 202, the input end cross-section of the air inlet duct 21 is larger than the output end cross-section. Specifically, the inner cavity of the air inlet duct 21 is in the shape of a quadrangular pyramid; a number of exhaust ducts 22 are evenly arranged at equal angles, and the number of exhaust ducts 22 is arranged one by one with the number of heat sinks 41. The output end of the exhaust duct 22 is arranged vertically upward, so that the exhaust duct 22 can perform separate heat dissipation for a single heat sink fin 41, thereby effectively concentrating the wind force output by the exhaust drum 81.

[0059] When the fan 8 drives the exhaust drum 81 to rotate, the exhaust drum 81 draws in external cold air from the air inlet duct 21 and enters the wind bin 202, and then the wind bin 202 evenly distributes the air to multiple exhaust ducts 22, and uses the airflow output from the exhaust duct 22 to the heat dissipation fins 41 for targeted heat dissipation.

[0060] See also Fig. 9 - Fig.10 In order to further improve the utilization rate of the output air of the exhaust drum 81, a cover cylinder 1 is also provided between the base 2 and the top cover 3. The bottom of the top cover 3 is rotatably connected with a rotating ring seat 7. The outer wall of the rotating ring seat 7 is evenly provided with a plurality of limit slide grooves 71 at equal angles. The top of the cover cylinder 1 is provided with a limit slider 14 matching the limit slide groove 71. The cover cylinder 1 is slidably connected to the outer side of the rotating ring seat 7 along the vertical direction through the limit slider 14 and the limit slide groove 71; the cover cylinder 1 is provided with a plurality of open grooves evenly arranged at equal angles, and the open grooves are rotatably connected with self-driving blades 11, and the rotating ring seat 7 is provided with an opening and closing mechanism for driving the self-driving blades 11 to open or close synchronously; the rotating ring seat 7 is also provided with a plurality of inner exhaust ports 72 evenly arranged at equal angles, and the top of the cover cylinder 1 is provided with an outer exhaust port 13 corresponding to the inner exhaust port 72.

[0061] When the opening and closing mechanism causes the self-driven blades 11 to close synchronously, a "chimney" is formed between the cover tube 1 and the outer cylinder 4. Utilizing the chimney effect, the heat emitted by the heat dissipating fins 41 automatically rises between the cover tube 1 and the outer cylinder 4, forming a negative pressure at the exhaust duct 22, and then automatically absorbing external cold air from the air inlet duct 21 into the space between the cover tube 1 and the outer cylinder 4, further improving the heat dissipation efficiency.

[0062] For details, please refer to Figure 2 , Fig.13 and Fig.10 - Fig.11 The opening and closing mechanism includes a rotating shaft 111 that rotatably connects one side of the self-driving blade 11 in the open groove. The top of the rotating shaft 111 extends through the cover tube 1 and is provided with two sets of spiral grooves 112. The bottom of the rotating ring seat 7 is provided with an adjusting sleeve 73 corresponding to the rotating shaft 111, and the adjusting sleeve 73 is provided with a ball corresponding to the spiral groove 112; a tensioning spring 33 is also clamped between the top of the cover tube 1 and the rotating ring seat 7, and the bottom of the cover tube 1 is also provided with an air guide cone ring 12, and a sealing magnetic strip 121 is fixed to the inner bottom of the air guide cone ring 12, and an electromagnetic ring 201 that cooperates with the sealing magnetic strip 121 is provided at the top of the base 2.

[0063] It should be noted that the tension spring 33 has the elastic force to drive the cover tube 1 to move up as a whole and closer to the top cover 3. When the tension spring 33 is in a free state, the sealing magnetic strip 121 follows the cover tube 1 to move up and away from the electromagnetic ring 201. At this time, the outer exhaust port 13 and the inner exhaust port 72 are staggered to form a closed state; the electromagnetic ring 201 has a magnetic attraction to the sealing magnetic strip 121 when power is on, and an anemometer 31 and a terminal block 32 are also fixed on the top of the top cover 3.

[0064] When the electromagnetic ring 201 is energized, the magnetic attraction force generated by the electromagnetic is used to make the sealing magnetic strip 121 and the cover tube 1 as a whole overcome the tension of the tension spring 33 and move downward, so that the sealing magnetic strip 121 fits on the electromagnetic ring 201 to close the lower port of the cover tube 1. At the same time, in the process of the cover tube 1 moving downward as a whole, the rotating shaft 111 moves downward relative to the adjusting sleeve 73, and the cooperation between the ball in the adjusting sleeve 73 and the spiral groove 112 is used to drive the self-driving blade 11 to rotate and close as a whole to form a "chimney". At this time, the external exhaust port 13 and the internal exhaust port 72 overlap and are open.

[0065] Similarly, when the electromagnetic ring 201 is powered off, the tension of the tension spring 33 is used to move the sealing magnetic strip 121 and the cover tube 1 upward as a whole, and the ball in the adjustment sleeve 73 is used to drive the self-driving blade 11 to rotate and open as a whole.

[0066] Specifically, a power generation device is also provided in the rotating ring seat 7, and the power generation device includes a power generation rotor 74 fixed on the inner side of the circular ring of the rotating ring seat 7, and the power generation rotor 74 is rotatably connected to the outer side of the circumference of the top cover 3. A power generation stator 35 matching the power generation rotor 74 is provided on the top of the top cover 3. A battery 34 and a control unit are also provided on the top of the top cover 3. The output end of the power generation device is rectified by a rectifier and then transmitted to the input end of the battery 34. The battery 34, the anemometer 31 and the electromagnetic ring 201 are all electrically connected to the control unit through wires.

[0067] When the anemometer 31 detects that the external wind speed is relatively high, the opening and closing mechanism drives the self-driving blades 11 to open and cuts off the power to the fan 8. At this time, the external wind force is used to drive the cover tube 1 in the state of opening the self-driving blades 11 to rotate, so as to dissipate heat from the heat dissipation fins 41. At the same time, the rotation of the cover tube 1 drives the power generation rotor 74 to rotate relative to the power generation stator 35, cutting the magnetic wire to generate electrical energy and input it into the battery 34 for energy storage.

[0068] When the anemometer 31 detects that the external wind speed is low, the opening and closing mechanism drives the self-driving blades 11 to close, and energizes the fan 8, and utilizes the rotation of the exhaust drum 81 to efficiently dissipate heat from the heat dissipation fins 41 between the cover tube 1 and the outer cylinder 4;

[0069] Since the top of the air guide cone ring 12 is bowl-shaped, when it rains outside, the top of the air guide cone ring 12 bears the weight of the rain, and also drives the cover tube 1 to move downward as a whole to close the self-driven blades 11. At this time, it can effectively prevent the external rain from corroding the heat dissipation fins 41. The inner cavity of the air inlet duct 21 is in the shape of a quadrangular pyramid, and rainwater is not easy to enter the air inlet duct 21. The external air can also enter the wind bin 202, and is transported to the heat dissipation fins 41 by the rotation of the one-way diaphragm 82 to dissipate heat.

[0070] The present invention solves the problem of heat concentration caused by the adjacent coils being too close to each other by designing three groups of iron cores 61 arranged at equal angles, thereby making the arrangement spacing of the wire core assembly 6 in the inner cylinder 5 more compact. The double-bin design of the outer cylinder 4 and the inner cylinder 5 is utilized to improve the self-circulation efficiency of the cooling oil and increase the seismic performance of the wire core assembly 6 inside the inner cylinder 5. In terms of switching the heat dissipation mode, according to the external wind speed detected by the anemometer 31 and weather conditions such as whether it is raining, the control unit controls the power on or off of the electromagnetic ring 201 to realize the opening or closing of the self-driving blades 11, and then automatically switches the heat dissipation mode, making full use of natural wind heat dissipation or starting the fan 8 for forced heat dissipation. At the same time, when the wind is strong, it can also realize power generation and energy storage, effectively improving the heat dissipation efficiency of the heat dissipation fins 41 and improving the operating stability of the transformer. It has market prospects and is suitable for promotion and application.

[0071] The above is only the best implementation method adopted by this application in combination with current actual needs, but the protection scope of this application is not limited to this.

Claims

1. A compact transformer, comprising an outer cylinder (4), an inner cylinder (5) and a core assembly (6), characterized in that: The wire core assembly (6) is encapsulated in the inner cylinder (5), and the wire core assembly (6) comprises three groups of iron cores (61) arranged at equal angles, and the sides of the iron cores (61) that are far away from each other are sleeved with primary coils (63), and the outer side of the primary coils (63) is sleeved with secondary coils (62); The inner cylinder (5) is encapsulated in the outer cylinder (4); a top cover (3) is provided on the top of the outer cylinder (4); a heat dissipation fin (41) is provided on the outer wall of the outer cylinder (4); the interiors of the outer cylinder (4) and the inner cylinder (5) are filled with cooling oil; an upper conduit (53) and a lower conduit (54) are provided on the top and bottom of the inner cylinder (5), respectively; and one-way valves are provided in the upper conduit (53) and the lower conduit (54); The inner cylinder (5) is also provided with a circulation mechanism for accelerating the hot oil in the inner cylinder (5) to enter the outer cylinder (4), and accelerating the cold oil in the outer cylinder (4) to enter the inner cylinder (5); An exhaust mechanism for accelerating heat dissipation of the heat dissipation fins (41) is provided at the bottom of the top cover (3).

2. A compact transformer according to claim 1, characterized in that: The circulation mechanism comprises a central support (56) fixed in the middle of the inner cylinder (5) and used to separate the three groups of iron cores (61); the inner cylinder (5) has an arc-shaped outer wall on one side close to the secondary coil (62); an elastic plate (51) is fixed between adjacent arc-shaped outer walls; the central support (56) is provided with a telescopic groove (561) between the gaps between adjacent iron cores (61); a partition (55) is slidably connected in the telescopic groove (561); an elastic rubber band (551) is fixed between the partition (55) and the telescopic groove (561); and one end of the partition (55) away from the central support (56) is fixed to the elastic plate (51); An expansion wing bin (52) is also fixed to one side of the outer wall of the elastic plate (51), and a connecting hole (511) for connecting the expansion wing bin (52) and the inner cylinder (5) is provided on the elastic plate (51).

3. A compact transformer according to claim 2, characterized in that: The elastic plate (51) is a beryllium copper alloy plate, the thickness of the middle portion of the elastic plate (51) is smaller than the thickness of the two sides thereof, and the wall thickness of the expansion wing chamber (52) is smaller than the minimum wall thickness of the elastic plate (51); The elastic rubber band (551) is a heat-vulcanized silicone rubber structure, and the elastic rubber band (551) has an elastic force that drives the partition (55) to approach the central support (56).

4. A compact transformer according to claim 2, characterized in that: Three groups of elastic rubber columns (501) arranged evenly at equal angles are fixed to the top and the bottom of the inner cylinder (5), and the elastic rubber columns (501) have elastic force to drive the inner cylinder (5) away from the inner wall of the outer cylinder (4).

5. A compact transformer according to claim 1, characterized in that: The exhaust mechanism comprises a base (2) fixed to the bottom of the outer cylinder (4); A wind bin (202) is provided in the base (2), a fan (8) is fixed at the bottom of the base (2), the output end of the fan (8) extends into the wind bin (202) and is fixed with an exhaust drum (81), the output end of the wind bin (202) is connected to an exhaust duct (22), the output end of the exhaust duct (22) extends to the bottom of the heat dissipation fin (41), the input end of the wind bin (202) is connected to an air inlet duct (21), and a one-way diaphragm (82) is fixed at a connection node between the air inlet duct (21) and the wind bin (202).

6. A compact transformer according to claim 5, characterized in that: The plurality of air inlet ducts (21) are evenly arranged at equal angles, the input end cross-section of the air inlet duct (21) is larger than the output end cross-section, and the inner cavity of the air inlet duct (21) is in the shape of a quadrangular pyramid; The plurality of exhaust ducts (22) are evenly arranged at equal angles, the number of the exhaust ducts (22) and the number of the heat dissipation fins (41) are arranged one-to-one, and the output end of the exhaust duct (22) is arranged vertically upward.

7. A compact transformer according to claim 5, characterized in that: A cover tube (1) is further provided between the base (2) and the top cover (3); the bottom of the top cover (3) is rotatably connected to a rotating ring seat (7); the outer wall of the rotating ring seat (7) is evenly provided with a plurality of limit slide grooves (71) at equal angles; a limit slide block (14) matching the limit slide groove (71) is provided at the top of the cover tube (1); the cover tube (1) is slidably connected to the outer side of the rotating ring seat (7) in a vertical direction via the limit slide block (14) and the limit slide groove (71); The cover tube (1) is provided with a plurality of opening slots evenly spaced at equal angles, and self-driving blades (11) are rotatably connected in the opening slots. The rotating ring seat (7) is provided with an opening and closing mechanism for driving the self-driving blades (11) to open or close synchronously. The rotating ring seat (7) is also provided with a plurality of internal air outlets (72) evenly spaced at equal angles, and the top of the cover tube (1) is provided with external air outlets (13) corresponding to the internal air outlets (72).

8. A compact transformer according to claim 7, characterized in that: The opening and closing mechanism comprises a rotating shaft (111) for rotatably connecting one side of the self-driving blade (11) to the open groove, the top of the rotating shaft (111) extending through the cover tube (1) and provided with two groups of spiral grooves (112), the bottom of the rotating ring seat (7) is provided with an adjusting sleeve (73) corresponding to the rotating shaft (111), and a ball corresponding to the spiral groove (112) is provided in the adjusting sleeve (73); A tension spring (33) is clamped between the top of the cover tube (1) and the rotating ring seat (7), and an air guide cone ring (12) is provided at the bottom of the cover tube (1). A sealing magnetic strip (121) is fixed to the inner bottom of the air guide cone ring (12), and an electromagnetic ring (201) that matches the sealing magnetic strip (121) is provided at the top of the base (2).

9. A compact transformer according to claim 8, characterized in that: The tension spring (33) has an elastic force that drives the cover tube (1) as a whole to move upward and closer to the top cover (3); when the tension spring (33) is in a free state, the sealing magnetic strip (121) moves upward with the cover tube (1) and away from the electromagnetic ring (201), and at this time, the outer air outlet (13) and the inner air outlet (72) are staggered and closed; The electromagnetic ring (201) has a magnetic attraction force on the sealing magnetic strip (121) when power is on, and an anemometer (31) and a connection terminal (32) are also fixed on the top of the top cover (3).

10. A compact transformer according to claim 9, characterized in that: A power generation device is also provided in the rotating ring seat (7), the power generation device comprising a power generation rotor (74) fixed on the inner side of the rotating ring seat (7), the power generation rotor (74) being rotatably connected to the outer side of the circumference of the top cover (3), a power generation stator (35) matching the power generation rotor (74) being provided on the top of the top cover (3), a storage battery (34) and a control unit being also provided on the top of the top cover (3), the output end of the power generation device being rectified by a rectifier and then transmitted to the input end of the storage battery (34), the storage battery (34), the anemometer (31) and the electromagnetic ring (201) being electrically connected to the control unit via a wire.

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