Modularized extensible dry-type transformer

Abstract

The invention discloses a modular extensible dry-type transformer which comprises a lower clamping piece, a transformer body, an upper clamping piece, a base and a heat dissipation device. The lower clamp and the upper clamp respectively clamp the upper and lower ends of the transformer main body; a pair of bearing frames arranged on the two sides of the transformer body is further fixedly connected to the base. The heat dissipation device comprises an air outlet pipe fitting, an air conveying assembly and an air outlet assembly. The air outlet assembly is fixedly connected to the bearing frame. The air conveying assembly is fixedly connected to the upper side of the lower clamping piece and arranged along the periphery of the transformer body. The air outlet assembly communicates with the air conveying assembly so as to convey air to the air conveying assembly. The air outlet pipe fitting is in threaded connection with the air conveying assembly and used for blowing air towards the transformer body to cool the transformer body. The transformer main body comprises three iron cores which are arranged in sequence, a pair of iron yokes and three windings; the pair of iron yokes are fixedly connected with the upper end and the lower end of the iron core respectively and are clamped by the lower clamping piece and the upper clamping piece respectively; the winding is correspondingly sleeved on the periphery of the iron core.

Description

Technical Field

[0001] This invention relates to the field of transformers, specifically to a modular and scalable dry-type transformer. Background Technology

[0002] Dry-type transformers are widely used in local lighting, high-rise buildings, airports, docks, CNC machinery and equipment and other places. Simply put, a dry-type transformer is a transformer whose core and windings are not immersed in insulating oil. Because the transformer has a lot of internal heat and the heat dissipation is not timely, it affects the working efficiency of the transformer and needs to be cooled.

[0003] The existing cooling method involves installing a fan at the bottom to cool the surface of the transformer windings. However, in actual operation, the utilization rate of the air volume generated by the fan is not high. The air volume generated by the fan carries away the heat of the windings from bottom to top, but as the air volume increases, a certain amount of heat accumulates within the air volume, and the cooling effect on the upper windings begins to weaken, resulting in uneven heat dissipation of the windings, which can lead to local overheating and failure. Therefore, this invention provides a modular and scalable dry-type transformer. Summary of the Invention

[0004] The purpose of this invention is to provide a modular and scalable dry-type transformer to solve the problem of weak winding cooling effect mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A modular and expandable dry-type transformer includes a lower clamp, a transformer body, an upper clamp, a base, and a heat dissipation device; the lower clamp and the upper clamp respectively clamp the upper and lower ends of the transformer body; the lower clamp is fixedly connected to the base; a pair of U-shaped support frames are also fixedly connected to the base on both sides of the transformer body; The heat dissipation device includes an air outlet duct, an air supply assembly, and an air outlet assembly; the air outlet assembly is fixedly connected to the support frame; the air supply assembly is fixedly connected to the upper side of the lower clamp and is arranged along the outer periphery of the transformer body; the air outlet assembly is connected to the air supply assembly to supply air volume to the air supply assembly; the air outlet duct is threadedly connected to the air supply assembly and is used to blow air toward the transformer body to cool the transformer body; The transformer body includes three iron cores arranged in sequence, a pair of iron yokes and three windings; the pair of iron yokes are fixedly connected to the upper and lower ends of the iron cores respectively, and the pair of iron yokes are clamped by the lower clamp and the upper clamp respectively; the windings are correspondingly sleeved on the outer circumference of the iron cores.

[0006] Preferably, the air outlet assembly includes a pair of air outlet hoods and two sets of fans; each support frame is fixedly connected to a set of fans; one end of the air outlet hood is connected to the air outlet of a set of fans, and the other end is connected to the air supply assembly, for conveying air volume to the air supply assembly.

[0007] Preferably, the air supply assembly includes multiple air inlet pipes, multiple air supply pipes, and connecting components; the multiple air inlet pipes are arranged end to end along the length of the support frame, and the multiple air supply pipes are arranged at intervals along the width of the support frame and the windings; the air inlet pipes and air supply pipes, as well as adjacent air inlet pipes, are connected by connecting components to create a cooling zone around the outer perimeter of the windings; the air inlet pipes and connecting components are connected to the air outlet hood.

[0008] Preferably, the upper side of both the air inlet pipe and the air outlet pipe is provided with multiple air outlet holes, and the upper wall thickness of the air inlet pipe and the air outlet pipe is greater than that of the other side walls; both ends of the air inlet pipe and the air outlet pipe are provided with slots; the side of the air inlet pipe facing the air outlet hood is provided with a first hollow opening for airflow to enter the air inlet pipe; a partition plate is fixedly connected in the middle of the air outlet pipe.

[0009] Preferably, the connecting assembly includes multiple T-pipes, multiple Two-pipes, and multiple retaining ring plates; each of the T-pipes and Two-pipes has a second perforation on the side facing the fan, and each of the other sides of the T-pipes has a first air outlet, and each of the Two-pipes has a second air outlet on both sides facing the air inlet and air outlet; retaining ring plates that match the retaining grooves are fixedly connected to the outside of the first and second air outlets; the side of the retaining ring plate away from the air outlet is perforated.

[0010] Preferably, the air outlet fitting includes multiple first air outlet pipes, multiple second air outlet pipes, and multiple adjusting components; the lower ends of the first and second air outlet pipes are fixedly connected with threaded rings, and the upper ends are provided with threaded grooves matching the threaded rings; the air outlet holes are used for threaded connection with the threaded rings; a third air outlet is provided along the axial direction of the first air outlet pipe, and a pair of symmetrical fourth air outlets are provided along the axial direction of the second air outlet pipe; the adjusting components are disposed on the outer periphery of the second air outlet pipes and are used to adjust the airflow direction of the pair of fourth air outlets.

[0011] Preferably, the steering component includes a pair of steering wheels, two pairs of fixed plates, and multiple hinges; a pair of fixed plates are fixedly connected to the outside of each fourth air outlet, and a hinge is fixedly connected to each fixed plate; the hinge includes multiple sub-hinges, a pivot, and a main hinge; the multiple sub-hinges are fixedly connected to the fixed plates, and the pivot passes through the sub-hinges and the main hinge, so that the main hinge can rotate around the pivot.

[0012] Preferably, a pair of steering wheels are disposed at the upper and lower ends of the fixed plate, and two pairs of clamping plates are fixedly connected to the steering wheels facing the fixed plate; each pair of clamping plates corresponds to a pair of main hinges on a pair of fixed plates, and the main hinges are located between each pair of clamping plates to follow the rotation of the steering wheel.

[0013] Preferably, a first cap and a second cap are threadedly connected to the first air outlet pipe and the second air outlet pipe respectively; the outer wall of the second cap is provided with a plurality of fifth air outlets and a plurality of embedding grooves; the fifth air outlets and the embedding grooves are spaced apart; and each fifth air outlet is embedded with a sealing block.

[0014] Preferably, the air supply assembly further includes at least one air inlet extension pipe and at least one air supply extension pipe for extending the length of the air inlet pipe and the air supply pipe; one end of the air inlet extension pipe and the air supply extension pipe is provided with a slot, the other end is fixedly connected to a retaining ring plate, and an air outlet is provided on the upper side; a sealing block is embedded in the air outlet, and a third hollow is provided on one side of the air inlet extension pipe and the retaining ring plate in the vertical direction.

[0015] Compared with the prior art, the beneficial effects of the present invention are: Multi-directional air outlet design improves cooling effect: The air supply component surrounds the winding to form a rectangular cooling zone, and with the adjustable air outlet pipe, it realizes circumferential air supply, ensuring that the winding is evenly exposed to air and avoiding local overheating of the winding.

[0016] Improve air volume utilization: The air inlet pipe and the air outlet pipe form a low-resistance air network through the three-way pipe and the two-way pipe. After the airflow is distributed by the air outlet hood, it can be fully delivered to the first air outlet pipe and the second air outlet pipe through the air inlet pipe and the air outlet pipe, ensuring that the air force blows evenly to the winding. The airflow direction of the fourth air outlet is adjusted by driving a pair of main hinges to rotate through the steering wheel, so that the adjacent windings receive air evenly and reduce the loss of air volume.

[0017] The modular expansion design can adapt to transformers of different specifications: the universal design of slots, retaining rings, air outlets, threaded rings, and threaded grooves, combined with the modular setting of air inlet pipes, air outlet pipes, connecting components, air outlet extension pipes, and air inlet extension pipes, can be extended and expanded according to different transformer sizes to create cooling zones of different areas; the first and second air outlet pipes can be adjusted to different heights to adapt to different transformer heights; the insert-type connection of slots and retaining rings enables quick connection, and the threaded connection of threaded rings and threaded grooves can also achieve quick adaptation and connection, reducing the difficulty of expansion.

[0018] The design of the embedded groove, sealing block and fifth air outlet allows the air outlet direction at the top of the second air outlet to be adjusted by opening the fifth air outlet at different positions. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the connection between the second air outlet pipe and the air supply pipe of the present invention; Figure 3 This is a plan view of the connection between the air inlet pipe and the air outlet pipe of the present invention; Figure 4 This is a cross-sectional view of the connection between the air outlet hood, the air inlet pipe, and the fan of the present invention. Figure 5 This is a schematic diagram of the connection between the air inlet pipe and the connecting component of the present invention; Figure 6 This is a cross-sectional view of the air duct structure of the present invention; Figure 7 This is an exploded view of the connection between the air inlet pipe and the connecting component of the present invention. Figure 8 This is a top-down view showing the disassembled structure of the connection between the air inlet pipe and the connecting component of the present invention; Figure 9 This is a cross-sectional view of the two-way pipe structure of the present invention; Figure 10 This is a cross-sectional view of the tee pipe structure of the present invention; Figure 11 This is a schematic diagram of the structure of the first air outlet duct of the present invention; Figure 12 This is an anatomical diagram of the structure of the second air outlet duct and the adjusting component of the present invention; Figure 13 This is a cross-sectional view of the structure at the fourth air outlet of the second air outlet pipe of the present invention; Figure 14 This is an exploded view of the structure of the orienting component of the present invention; Figure 15 This is a disassembled structural diagram of the connection between the second air outlet duct and the fixed plate, as well as the adjusting component, of the present invention. Figure 16 This is a schematic diagram showing the positional relationship between the second air outlet pipe and the main hinge plate of the present invention; Figure 17 For the present invention Figure 16 Enlarged view of the structure at the connection between the steering wheel and the main hinge at point A; Figure 18 This is an exploded view of the structure at the connection between the second cap and the threaded groove of the present invention; Figure 19 This is an anatomical diagram of the air inlet extension pipe and sealing block structure of the present invention; Figure 20 This is a disassembled diagram of the air supply extension pipe and sealing block structure of the present invention.

[0020] In the diagram: 1. Lower clamping component; 2. Transformer body; 21. Iron core; 22. Iron yoke; 23. Winding; 3. Upper clamping component; 4. Base; 5. Air outlet components; 51. First air outlet pipe; 511. Third air outlet; 52. Second air outlet pipe; 521. Fourth air outlet; 53. Orientation component; 531. Steering wheel; 5311. Clamping plate; 532. Fixing plate; 533. Hinge; 5331. Sub-hinge piece; 5332. Rotating shaft; 5333. Main hinge piece; 54. Threaded ring; 55. Threaded groove; 56. First... 57 Second cap, 571 Fifth air outlet, 572 Embedded groove, 573 Sealing block, 6 Air supply assembly, 61 Air inlet pipe, 62 Air supply pipe, 621 Divider plate, 63 Connecting assembly, 631 T-pipe, 6311 First air outlet, 632 Two-way pipe, 6321 Second air outlet, 633 Clamping ring plate, 64 Air outlet hole, 65 Clamping groove, 67 Sealing block, 7 Air outlet assembly, 71 Air outlet hood, 72 Fan, 8 Air inlet extension pipe, 9 Air supply extension pipe. Detailed Implementation

[0021] Example 1:

[0022] Please see Figure 1-18 The present invention provides a technical solution: such as Figures 1-2 As shown, a modular expandable dry-type transformer includes a lower clamp 1, a transformer body 2, an upper clamp 3, a base 4, and a heat dissipation device; the lower clamp 1 and the upper clamp 3 respectively clamp the upper and lower ends of the transformer body 2; the lower clamp 1 is fixedly connected to the base 4; a pair of U-shaped support frames 41 arranged on both sides of the transformer body 2 are also fixedly connected to the base 4.

[0023] The heat dissipation device includes an air outlet duct 5, an air supply assembly 6, and an air outlet assembly 7. The air outlet assembly 7 is fixedly connected to the support frame 41. The air supply assembly 6 is fixedly connected to the upper side of the lower clamp 1 and is arranged along the outer periphery of the transformer body 2. The air outlet assembly 7 communicates with the air supply assembly 6 to supply air to the air supply assembly 6. The air outlet duct 5 is threadedly connected to the air supply assembly 6 and is used to blow air toward the transformer body 2 to cool the transformer body 2.

[0024] The transformer body 2 includes three iron cores 21 arranged in sequence, a pair of yokes 22, and three windings 23. The pair of yokes 22 are fixedly connected to the upper and lower ends of the iron cores 21, and are respectively clamped by the lower clamp 1 and the upper clamp 3. The windings 23 are fitted around the outer periphery of the iron cores 21. Each winding 23 has multiple evenly distributed pads 231 at both ends, and the pads 231 are fixedly connected to the corresponding lower clamp 1 and upper clamp 3.

[0025] like Figures 2-6 As shown, the air outlet assembly 7 includes a pair of air outlet hoods 71 ​​and two sets of fans 72; each support frame 41 is fixedly connected to a set of fans 72. One end of the air outlet hood 71 is connected to the air outlet of a set of fans 72 and sealed at the connection, and the other end is connected to the air supply assembly 6 and sealed at the connection, for delivering air volume to the air supply assembly 6.

[0026] The air supply assembly 6 includes multiple air inlet pipes 61, multiple air supply pipes 62, and connecting components 63. The multiple air inlet pipes 61 are arranged end-to-end along the length of the support frame 41. The multiple air supply pipes 62 are spaced apart from the windings 23 along the width of the support frame 41, with the windings 23 between adjacent air supply pipes 62, forming a rectangular cooling zone around the outer edge of the windings 23 (the number of air inlet pipes 61 and air supply pipes 62 is determined based on the actual number of windings 23 requiring cooling. Each winding 23 requires a pair of air inlet pipes 61 and a pair of air supply pipes 62 to form a rectangle; for each additional winding 23, an additional pair of air inlet pipes 61 and one air supply pipe 62 are required). The air supply pipes 62 and air inlet pipes 61 are preferably rectangular in cross-section. The air inlet pipes 61 and 62, as well as adjacent air inlet pipes 61, are connected by connecting components 63, which are arranged along the length of the air inlet pipes 61. Multiple air outlet holes 64 are provided on the upper side of both the air inlet pipe 61 and the air outlet pipe 62. The upper wall thickness of the air inlet pipe 61 and the air outlet pipe 62 is greater than that of the other side walls to ensure the stability of the air outlet pipe fitting 5 during connection. Slots 65 are provided at both ends of both the air inlet pipe 61 and the air outlet pipe 62. A first perforation is provided on the side of the air inlet pipe 61 facing the air outlet hood 71 to allow airflow into the air inlet pipe 61. A pair of support rods are also fixedly connected inside the air inlet pipe 61 to ensure its stability. A partition plate 621 is fixedly connected to the middle of the air outlet pipe 62.

[0027] like Figures 7-10 As shown, the connecting assembly 63 includes multiple T-pipes 631, multiple Two-way pipes 632, and multiple retaining ring plates 633. Each T-pipe 631 and two-way pipe 632 has a second perforation on its side facing the fan 72. Each of the other sides of the T-pipe 631 has a first air outlet 6311. Each two-way pipe 632 has a second air outlet 6321 on both sides facing the air inlet pipe 61 and the air outlet pipe 62. Retaining ring plates 633 are fixedly connected to the outer sides of the first air outlet 6311 and the second air outlet 6321. Retaining ring plates 633 match the retaining groove 65 and are inserted into the retaining groove 65 to connect the ends of the air outlet pipe 62 and the adjacent air inlet pipe 61 through the T-pipes 631, and to connect the ends of the adjacent air outlet pipe 62 and the air inlet pipe 61 through the two-way pipes 632 (the specific number of T-pipes 631 and two-way pipes 632 is determined according to the number of air inlet pipes 61 and air outlet pipes 62). Furthermore, the retaining ring plate 633 has a perforated side away from the air supply pipe 62 to reduce air resistance. The air inlet pipe 61, the three-way pipe 631 and the two-way pipe 632 located on the same side are sealed and connected to the corresponding air outlet hood 71; the air outlet hood 71 is made of airtight fabric or other flexible material.

[0028] like Figures 1-2 and Figures 11-13As shown, the air outlet duct 5 includes multiple first air outlet ducts 51, multiple second air outlet ducts 52, and multiple adjusting components 53. The lower ends of both the first air outlet ducts 51 and the second air outlet ducts 52 are fixedly connected to threaded rings 54, and the upper ends are provided with threaded grooves 55 matching the threaded rings 54. The inner wall of the air outlet 64 is threaded for threaded connection with the threaded rings 54, allowing the first air outlet ducts 51 and the second air outlet ducts 52 to be vertically and sequentially threaded to extend the air outlet height, thus adapting to the height of the winding 23. A third air outlet 511 is provided along the axial direction of the first air outlet duct 51, and a pair of symmetrical fourth air outlets 521 are provided along the axial direction of the second air outlet ducts 52. The first air outlet ducts 51 are threadedly connected to the air inlet duct 61 and the outermost pair of air supply ducts 62, and the second air outlet ducts 52 are threadedly connected to the air supply ducts 62 between adjacent windings 23. The directional adjustment component 53 is located on the outer periphery of the second air outlet 52 and is used to adjust the air direction of a pair of fourth air outlets 521.

[0029] like Figures 14-17 As shown, the adjusting component 53 includes a pair of steering discs 531, two pairs of fixing plates 532, and multiple hinges 533. A pair of fixing plates 532 are fixedly connected to the outside of each fourth air outlet 521, and a hinge 533 is fixedly connected to each fixing plate 532. Each hinge 533 includes multiple sub-hinges 5331, a pivot 5332, and a main hinge 5333. The multiple sub-hinges 5331 are fixedly connected to the fixing plates 532. The pivot 5332 passes through the sub-hinges 5331 and the main hinge 5333. The pivot 5332 is located on the side of the fourth air outlet 521, allowing the main hinge 5333 to rotate around the pivot 5332. This allows the airflow direction of the fourth air outlet 521 to be adjusted by the coordinated rotation of the pair of main hinges 5333 on the pair of fixing plates 532. The main hinge 5333 does not extend beyond the side of the air duct 62.

[0030] A pair of steering wheels 531 are set at the upper and lower ends of the fixed plate 532. Two pairs of clamping plates 5311 are fixedly connected to the steering wheels 531 in the direction of the fixed plate 532. The clamping plates 5311 are close to the outer side of the main hinge piece 5333. Each pair of clamping plates 5311 corresponds to a pair of main hinge pieces 5333 on a pair of fixed plates 532, and the spacing between each pair of clamping plates 5311 matches the corresponding main hinge piece 5333. The main hinge piece 5333 is set between each corresponding pair of clamping plates 5311 and is used to rotate with the steering wheel 531 when it rotates, thereby changing the air outlet direction of the fourth air outlet 521.

[0031] The inner and outer diameters of the first air outlet pipe 51 and the second air outlet pipe 52 are the same.

[0032] like Figure 1 and Figure 18As shown, a first cap 56 and a second cap 57 are threadedly connected to the topmost first air outlet duct 51 and second air outlet duct 52, respectively; the first cap 56 has a smooth surface. The outer wall of the second cap 57 has multiple fifth air outlets 571 and multiple embedding grooves 572; the fifth air outlets 571 and embedding grooves 572 are spaced apart; each fifth air outlet 571 has a sealing block 573 embedded in it, and the sealing block 573 is fixed to the top of the second cap 57 by a rope. Preferably, there are six to eight fifth air outlets 571, and the air outlet direction is inclined, preferably at 45°.

[0033] Installation process: After the operator creates a cooling zone using the air supply pipe 62 and the air inlet pipe 61, multiple first air outlet pipes 51 are threaded sequentially axially onto the air outlet holes 64 of the air inlet pipe 61 and the outermost pair of air supply pipes 62, matching the height of the winding 23. The topmost first air outlet pipe 51 is threaded with a first cap 56. Simultaneously, the bottommost first air outlet pipe 51 can be rotated to adjust the orientation of the third air outlet 511, so that the third air outlet 511 faces the winding 23. Multiple second air outlet pipes 52 are threaded sequentially axially onto the air supply pipes 62 between adjacent windings 23, matching the height of the winding 23. Simultaneously, the orientation of the fourth air outlet 521 can be adjusted via the adjusting component 53. Specifically, the operator rotates the steering wheel 531 to rotate the two pairs of clamping plates 5311, which in turn rotate the corresponding pair of main hinge plates 5333, thereby adjusting the orientation of the airflow at the fourth air outlet 521 so that the airflow is directed towards the windings 23 on both sides. The second air outlet 52 at the top is threadedly connected to the second cap 57. The sealing block 573 on the fifth air outlet 571 facing the windings 23 on both sides is pulled out, and then the sealing plate 573 is inserted into the adjacent embedded groove 572, so that the airflow is directed towards the windings 23 diagonally upwards.

[0034] Working principle: After installation, the operator starts the fan 72. The air volume generated by the multiple fans 72 on the support frame 41 flows through the air outlet hood 71 to the air inlet pipe 61. Part of the air volume flows through the air inlet pipe 61 to the corresponding first air outlet pipe 51, and finally blows to the winding 23 from the third air outlet 511. At the same time, another part of the air volume from the air outlet hood 71 flows through the three-way pipe 631 and the two-way pipe 632 to the air supply pipe 62, and then flows through the air supply pipe 62 to the corresponding first air outlet pipe 51 and second air outlet pipe 52, and finally blows to the winding 23 from the third air outlet 511 and the fourth air outlet 521.

[0035] Example 2

[0036] Based on Example 1, such as Figures 19-20 As shown, at least one air inlet extension pipe 8 and at least one air outlet extension pipe 9 are also provided to extend the length of the air inlet pipe 61 and the air outlet pipe 62 to accommodate windings 23 of different specifications.

[0037] One end of the air inlet extension pipe 8 has a slot 65, and the other end is fixedly connected to a retaining ring plate 633. An air outlet hole 64 is also provided on the upper side. The wall of the air outlet hole 64 is threaded for threaded connection with a threaded ring 54. A sealing block 67 is embedded inside the air outlet hole 64. The sealing block 67 has a certain degree of flexibility and can be inserted into the air outlet hole 64 to achieve a seal. A third perforation is provided on one vertical side of the air inlet extension pipe 8 and the retaining ring plate 633. When the air inlet pipe 61 needs to be extended, the operator positions the third perforation towards the fan 72, then inserts the retaining ring plate 633 into the slot 65 of the air inlet pipe 61. Finally, the retaining ring plate 633 on the tee pipe 631 is inserted into the slot 65 of the air inlet extension pipe 8 to achieve connection. If further extension is required, multiple air inlet extension pipes 8 can be connected end-to-end, that is, the retaining ring plates 633 of adjacent air inlet extension pipes 8 are inserted into the slots 65 to adapt to the size of the winding 23.

[0038] One end of the air supply extension pipe 9 has a slot 65, and the other end is fixedly connected to a retaining ring plate 633. A threaded air outlet hole 64 is opened on the upper side, and a sealing block 67 is embedded in the air outlet hole 64. When the air supply pipe 62 needs to be extended, the operator inserts the retaining ring plate 633 of the air supply extension pipe 9 into the slot 65 at the end of the air supply pipe 62. Finally, the retaining ring plates 633 on the two connecting pipes 632 are inserted into the slot 65 of the air supply extension pipe 9 to achieve connection. If further extension is required, multiple air supply extension pipes 9 are connected end-to-end, that is, the retaining ring plates 633 of adjacent air supply extension pipes 9 are inserted into the slot 65 to adapt to the size of the winding 23.

Claims

1. A modular, scalable dry-type transformer, characterized in that: It includes a lower clamp (1), a transformer body (2), an upper clamp (3), a base (4), and a heat dissipation device; the lower clamp (1) and the upper clamp (3) respectively clamp the upper and lower ends of the transformer body (2); the lower clamp (1) is fixedly connected to the base (4); a pair of U-shaped support frames (41) set on both sides of the transformer body (2) are also fixedly connected to the base (4); The heat dissipation device includes an air outlet duct (5), an air supply assembly (6), and an air outlet assembly (7); the air outlet assembly (7) is fixedly connected to the support frame (41); the air supply assembly (6) is fixedly connected to the upper side of the lower clamp (1) and is arranged along the outer periphery of the transformer body (2); the air outlet assembly (7) is connected to the air supply assembly (6) to supply air to the air supply assembly (6); the air outlet duct (5) is threadedly connected to the air supply assembly (6) and is used to blow air toward the transformer body (2) to cool the transformer body (2); The transformer body (2) includes three iron cores (21) arranged in sequence, a pair of iron yokes (22) and three windings (23); the pair of iron yokes (22) are fixedly connected to the upper and lower ends of the iron cores (21) respectively, and the pair of iron yokes (22) are clamped by the lower clamp (1) and the upper clamp (3) respectively; the windings (23) are correspondingly sleeved on the outer periphery of the iron cores (21).

2. A modular and scalable dry-type transformer according to claim 1, characterized in that: The air outlet assembly (7) includes a pair of air outlet hoods (71) and two sets of fans (72); each support frame (41) is fixedly connected to a set of fans (72); one end of the air outlet hood (71) is connected to the air outlet of a set of fans (72), and the other end is connected to the air supply assembly (6) to deliver air volume to the air supply assembly (6).

3. A modular and scalable dry-type transformer according to claim 2, characterized in that: The air supply assembly (6) includes multiple air inlet pipes (61), multiple air supply pipes (62), and connecting components (63); the multiple air inlet pipes (61) are arranged end to end along the length direction of the support frame (41), and the multiple air supply pipes (62) are spaced apart along the width direction of the support frame (41) and the winding (23). The air inlet pipes (61) and the air supply pipes (62) are connected to each other and to adjacent air inlet pipes (61) through connecting components (63) to create a cooling zone around the outside of the winding (23); the air inlet pipes (61) and the connecting components (63) are connected to the air outlet hood (71).

4. A modular scalable dry-type transformer according to claim 3, characterized in that: Multiple air outlet holes (64) are provided on the upper side of the air inlet pipe (61) and the air outlet pipe (62). The upper wall thickness of the air inlet pipe (61) and the air outlet pipe (62) is greater than that of the other side walls. The air inlet pipe (61) and the air outlet pipe (62) are provided with slots (65) at both ends. The air inlet pipe (61) has a first perforation on the side facing the air outlet hood (71) for airflow to enter the air inlet pipe (61). A partition plate (621) is fixedly connected in the middle of the air outlet pipe (62).

5. A modular scalable dry-type transformer according to claim 4, characterized in that: The connecting component (63) includes multiple three-way pipes (631), multiple two-way pipes (632), and multiple retaining ring plates (633); the three-way pipes (631) and the two-way pipes (632) are provided with a second hollow on the side facing the fan (72), the three-way pipes (631) are provided with a first air outlet (6311) on the other side, and the two-way pipes (632) are provided with a second air outlet (6321) on both sides facing the air inlet pipe (61) and the air delivery pipe (62); the retaining ring plates (633) that match the retaining groove (65) are fixedly connected to the outside of the first air outlet (6311) and the second air outlet (6321); the retaining ring plates (633) are hollow on the side away from the air delivery pipe (62).

6. A modular scalable dry-type transformer according to claim 4, characterized in that: The air outlet fitting (5) includes multiple first air outlet pipes (51), multiple second air outlet pipes (52), and multiple adjusting components (53); the lower ends of the first air outlet pipes (51) and the second air outlet pipes (52) are fixedly connected with threaded rings (54), and the upper ends are provided with threaded grooves (55) matching the threaded rings (54); the air outlet hole (64) is used to be threadedly connected to the threaded rings (54); a third air outlet (511) is provided along the axial direction of the first air outlet pipe (51), and a pair of symmetrical fourth air outlets (521) are provided along the axial direction of the second air outlet pipe (52); the adjusting component (53) is set on the outer periphery of the second air outlet pipe (52) and is used to adjust the air direction of the pair of fourth air outlets (521).

7. A modular and scalable dry-type transformer according to claim 6, characterized in that: The steering component (53) includes a pair of steering wheels (531), two pairs of fixed plates (532), and multiple hinges (533); a pair of fixed plates (532) are fixedly connected to the outside of each fourth air outlet (521), and a hinge (533) is fixedly connected to each fixed plate (532); the hinge (533) includes multiple sub-hinges (5331), a pivot (5332), and a main hinge (5333); the multiple sub-hinges (5331) are fixedly connected to the fixed plates (532), and the pivot (5332) passes through the sub-hinges (5331) and the main hinge (5333), so that the main hinge (5333) can rotate around the pivot (5332).

8. A modular scalable dry-type transformer according to claim 7, characterized in that: A pair of steering wheels (531) are set at the upper and lower ends of the fixed plate (532). Two pairs of clamping plates (5311) are fixedly connected to the steering wheels (531) facing the fixed plate (532). Each pair of clamping plates (5311) corresponds to a pair of main hinge pieces (5333) on a pair of fixed plates (532), and the main hinge pieces (5333) are located between each pair of clamping plates (5311) to follow the rotation of the steering wheel (531).

9. A modular and scalable dry-type transformer according to claim 6, characterized in that: A first cap (56) and a second cap (57) are threadedly connected to the first air outlet pipe (51) and the second air outlet pipe (52), respectively; the outer wall of the second cap (57) is provided with multiple fifth air outlets (571) and multiple embedded grooves (572); the fifth air outlets (571) and the embedded grooves (572) are spaced apart; each fifth air outlet (571) is embedded with a sealing block (573).

10. A modular scalable dry-type transformer according to claim 4, characterized in that: The air supply assembly (6) also includes at least one air inlet extension pipe (8) and at least one air supply extension pipe (9) for extending the length of the air inlet pipe (61) and the air supply pipe (62); one end of the air inlet extension pipe (8) and the air supply extension pipe (9) is provided with a slot (65), and the other end is fixedly connected to a retaining ring plate (633), and an air outlet hole (64) is provided on the upper side; a sealing block (67) is embedded in the air outlet hole (64), and a third hollow is provided on one side of the air inlet extension pipe (8) and the retaining ring plate (633) in the vertical direction.

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