A box-type combined transformer

Abstract

This invention relates to the field of combined transformer technology and discloses a box-type combined transformer, including a base, a housing fixedly connected to the top of the base, a second dustproof net fixedly connected to the top of the housing, an installation mechanism at the bottom of the housing, a transformer body on the top of the installation mechanism, fixing mechanisms on both sides of the transformer body, and heat dissipation mechanisms on both sides of the housing. The installation mechanism includes a support base, each fixedly connected to the bottom of the housing, and mounting shells fixedly connected to both sides of the top of the support base. This box-type combined transformer greatly facilitates maintenance personnel in repairing the transformer when damage occurs. Maintenance personnel can quickly remove the transformer from its installation location and transport it to a dedicated maintenance area for inspection and repair, effectively shortening maintenance time and reducing power outage time caused by transformer failure.

Description

Technical Field

[0001] This invention relates to the field of combined transformer technology, specifically a box-type combined transformer. Background Technology

[0002] Combined transformers integrate multiple functional units into a single enclosure, typically made of steel plate or alloy materials, offering excellent sealing and protection. For example, their shape is usually a rectangular enclosure, relatively small in size, effectively saving installation space. This compact design allows them to be installed in space-constrained locations such as roadside in city streets, substations in residential areas, or load centers in factories.

[0003] Patent publication number CN 219936805 U discloses a box-type combined transformer, including a box-type transformer body. The interior of the box-type transformer body is divided into a low-voltage chamber, a transformer chamber, and a high-voltage chamber by steel plates, and the low-voltage chamber, transformer chamber, and high-voltage chamber are each hinged with a door. In this utility model, a circulating cooling mechanism consisting of a cooling box, a blower unit, an exhaust unit, and a connecting pipe is respectively set on the back of the box-type transformer body corresponding to the low-voltage chamber, transformer chamber, and high-voltage chamber. By activating the exhaust unit that runs through the upper part of the box-type transformer body, the exhaust unit, under the action of the connecting pipe, introduces air from inside the box-type transformer body into the cooling box. The introduced air is filtered and dust-removed by a filter screen set on the mounting plate. Then, the semiconductor cooling chip inside the cooling box is activated, and its cold end cools the air introduced into the cooling box. Finally, the blower unit and another connecting pipe introduce the cooled air into the interior of the box-type transformer body.

[0004] The above-mentioned equipment has the following disadvantages: This box-type combined transformer has problems that cannot be ignored in practical applications. In its internal structural design, the transformer is fixed in a specific position with no flexibility. This fixing method seems stable, but it brings many troubles.

[0005] When a transformer is damaged, maintenance personnel often find themselves in a predicament. Because it is fixed in place, they will encounter many obstacles when trying to approach it. The space inside the enclosure is designed to accommodate various components in a compact manner, without leaving enough space for easy disassembly of the transformer. Maintenance personnel may need to spend a lot of time removing some auxiliary equipment around the enclosure or partially disassembling the enclosure before they can reach the transformer. This process is tedious and time-consuming. Summary of the Invention

[0006] The purpose of this invention is to provide a box-type combined transformer to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a box-type combined transformer, including a base, a housing fixedly connected to the top of the base, a second dustproof net fixedly connected to the top of the housing, an installation mechanism provided at the bottom of the housing, a transformer body provided at the top of the installation mechanism, fixing mechanisms provided on both sides of the transformer body, and heat dissipation mechanisms provided on both sides of the housing.

[0008] The installation mechanism includes a support base, which is fixedly connected to the bottom of the housing. Mounting shells are fixedly connected to both sides of the top of the support base. Connecting plates are fixedly connected to the bottom of both sides of the mounting shells. The connecting plates are fixedly connected to the top of the support base by bolts. A slide rail is fixedly connected inside the mounting shell. Rollers are slidably connected inside the slide rail. A support rod is fixedly connected to the inner ring of the roller. A support frame is rotatably connected to the surface of the support rod. The transformer body is fixedly connected to the top of the support frame. The support frame is located on the top of the support base. A limiting element is provided on the surface of the roller. A toothed plate is fixedly connected to the surface of the limiting element. The toothed plate penetrates the support frame. A spur gear meshes between two toothed plates. A first motor is fixedly connected to the inner ring of the spur gear. A rectangular plate is fixedly connected to the bottom of the first motor. A placement plate is fixedly connected to the bottom of the rectangular plate. The placement plate is fixedly connected to the middle of the top of the support base.

[0009] Preferably, the number of rollers is four, the limiting member is disposed on the two rear roller surfaces, and the two toothed plates are disposed on the top and bottom of the flat gear. Under the rotational drive of the flat gear, the toothed plates on both sides can be effectively driven, thereby moving towards each other or away from each other.

[0010] Preferably, a vertical plate is fixedly connected to the bottom of the toothed plate, and a circular groove is formed in the bottom of the vertical plate. A positioning rod is slidably connected in the circular groove. The positioning rod is fixedly connected to the surface of the placement plate, and a connecting block is fixedly connected to the side of the positioning rod away from the placement plate. When the toothed plate moves, the positioning rod slides inside the vertical plate, which can ensure the stability of the toothed plate during movement.

[0011] Preferably, the fixing mechanism includes a fixing frame, which is fixedly connected to both sides of the transformer body. A support plate is fixedly connected to the bottom of the fixing frame, and a T-shaped plate is fixedly connected to the bottom of the support plate. A T-shaped shell is inserted into the surface of the T-shaped plate, and the T-shaped shell is fixedly connected to both sides of the bottom inside the shell. With the cooperation of the T-shaped shell and the T-shaped plate, the initial positioning of the transformer body can be achieved.

[0012] Preferably, the support plate extends towards the side closer to the transformer body, and a limiting groove is formed in the support plate. A limiting rod is inserted into the limiting groove and fixedly connected to the rear side of the housing. The limiting rod has a cylindrical design, and the T-shaped plate can be inserted into the interior of the T-shaped housing. At this time, the limiting rod can be inserted into the limiting groove formed inside the support plate.

[0013] Preferably, the limiting rod surface is provided with threads, and a locking nut is threadedly connected to the limiting rod surface. The locking nut is located on the front side of the support plate. By threading the locking nut to the surface of the limiting rod, the transformer body can be fixed, ensuring that the transformer body will not shift randomly during operation.

[0014] Preferably, the heat dissipation mechanism includes heat dissipation slots, all of which are opened on both sides of the housing. A rectangular shell is fixedly connected inside the heat dissipation slot, and a condenser plate is fixedly connected inside the rectangular shell. A blower fan is fixedly connected to the side of the condenser plate away from the transformer body. An output shaft is fixedly connected to the inner ring of the blower fan. A second motor is fixedly connected to the side of the output shaft away from the condenser plate. The second motor is located at the center of the rectangular shell. Under the rotation of the blower fan, external air can enter the interior of the housing through the first dustproof net.

[0015] Preferably, a connecting frame is fixedly connected to the surface of the second motor. The connecting frame is fixedly connected to the rectangular shell and rotatably connected to the surface of the output shaft. The connecting frame can support and fix the second motor, preventing the second motor from shaking during operation.

[0016] Preferably, the rectangular shell has a groove on its surface, and a first dustproof net is inserted into the groove. A pull block is fixedly connected to the front side of the first dustproof net. The pull block is located on the front side of the rectangular shell. Under the action of the first dustproof net, external dust can be prevented from entering and affecting the use of the transformer body.

[0017] Preferably, the number of condenser plates is several, and the several condenser plates are distributed at equal intervals. When air passes through the condenser plates, it will turn into cold air. At this time, the cold air fills the area around the transformer body and can dissipate heat from the transformer body.

[0018] Compared with the prior art, the present invention provides a box-type combined transformer, which has the following beneficial effects:

[0019] 1. This box-type modular transformer, with its easy installation and disassembly design, greatly facilitates maintenance personnel in repairing the transformer when damage occurs. Maintenance personnel can quickly remove the transformer from its installation location and send it to a dedicated maintenance area for inspection and repair, effectively shortening maintenance time and reducing power outage time caused by transformer failure.

[0020] 2. This box-type modular transformer, by connecting the locking nut threaded to the surface of the limiting rod, acts like a robust "safety lock" for the entire installation process, which can fix the transformer body in all directions. In this fixed state, even if the transformer body is affected by various external forces during operation, such as slight vibrations, there will be no random displacement, thus ensuring the normal operation of the transformer.

[0021] 3. The condenser plate of this box-type combined transformer uses special materials and design to rapidly reduce the temperature of the air, turning it into cool air. This cool air quickly diffuses inside the casing, filling the area around the transformer body, like putting a "cool coat" on it. It effectively absorbs the heat emitted by the transformer body, thus providing efficient heat dissipation. This heat dissipation method avoids overheating and malfunctions, greatly extending the service life of the transformer and ensuring the stable operation of the power system. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort:

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the overall structure of the present invention from an oblique angle.

[0025] Figure 3 This is a schematic diagram of the transformer body structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the installation mechanism of the present invention;

[0027] Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point A in the middle;

[0028] Figure 6This is a slanted view of the installation mechanism of the present invention;

[0029] Figure 7 This is a schematic diagram of part of the installation mechanism of the present invention;

[0030] Figure 8 This is a schematic diagram of the fixing mechanism of the present invention;

[0031] Figure 9 This is a schematic diagram of the heat dissipation mechanism of the present invention;

[0032] Figure 10 This is a cross-sectional schematic diagram of the heat dissipation mechanism of the present invention.

[0033] In the diagram: 1. Housing; 2. Mounting mechanism; 21. Roller; 22. Slide rail; 23. Support base; 24. Connecting plate; 25. Mounting shell; 26. Support frame; 27. Placement plate; 28. Support rod; 29. ​​Connecting block; 201. Positioning rod; 202. Toothed plate; 203. Vertical plate; 204. Flat gear; 205. Limiting component; 206. First motor; 3. Fixing mechanism; 31. T-shaped shell; 32. Fixing frame; 33. Limiting rod; 34. Support plate; 35. T-shaped plate; 4. Heat dissipation mechanism; 41. Pull block; 42. First dustproof net; 43. Condensation plate; 44. Second motor; 45. Connecting frame; 46. Rectangular shell; 47. Fan; 5. Transformer body; 6. Base; 7. Second dustproof net. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] This invention provides a technical solution:

[0036] Example 1:

[0037] Combination Figure 1-3 to Figure 4-7 A box-type combined transformer includes a base 6, a housing 1 fixedly connected to the top of the base 6, a second dustproof net 7 fixedly connected to the top of the housing 1, an installation mechanism 2 provided at the bottom inside the housing 1, a transformer body 5 provided at the top of the installation mechanism 2, fixing mechanisms 3 provided on both sides of the transformer body 5, and heat dissipation mechanisms 4 provided on both sides of the housing 1.

[0038] The mounting mechanism 2 includes a support base 23, which is fixedly connected to the bottom of the housing 1. Mounting shells 25 are fixedly connected to both sides of the top of the support base 23. Connecting plates 24 are fixedly connected to the bottom sides of the mounting shells 25, and the connecting plates 24 are fixedly connected to the top of the support base 23 by bolts. A slide rail 22 is fixedly connected inside the mounting shell 25, and a roller 21 is slidably connected inside the slide rail 22. A support rod 28 is fixedly connected to the inner ring of the roller 21, and a support frame 26 is rotatably connected to the surface of the support rod 28. The transformer body 5 is fixed. The roller 21 is connected to the top of the support frame 26, which is located on the top of the support base 23. The roller 21 has a limiting element 205 on its surface. A toothed plate 202 is fixedly connected to the surface of the limiting element 205. The toothed plate 202 passes through the support frame 26. A spur gear 204 meshes between the two toothed plates 202. A first motor 206 is fixedly connected to the inner ring of the spur gear 204. A rectangular plate is fixedly connected to the bottom of the first motor 206. A placement plate 27 is fixedly connected to the bottom of the rectangular plate. The placement plate 27 is fixedly connected to the middle of the top of the support base 23.

[0039] Furthermore, four rollers 21 are provided, and limiting members 205 are provided on the surfaces of the two rear rollers 21. Two toothed plates 202 are provided on the top and bottom of the spur gear 204. Under the rotational drive of the spur gear 204, the toothed plates 202 on both sides can be effectively driven, thereby moving towards each other or away from each other.

[0040] Furthermore, a vertical plate 203 is fixedly connected to the bottom of the toothed plate 202. A circular groove is opened in the bottom of the vertical plate 203, and a positioning rod 201 is slidably connected in the circular groove. The positioning rod 201 is fixedly connected to the surface of the placement plate 27. A connecting block 29 is fixedly connected to the side of the positioning rod 201 away from the placement plate 27. When the toothed plate 202 moves, the positioning rod 201 slides inside the vertical plate 203, which can ensure the stability of the toothed plate 202 during movement.

[0041] Example 2:

[0042] See Figure 8 Furthermore, based on Embodiment 1, the fixing mechanism 3 further includes a fixing frame 32, which is fixedly connected to both sides of the transformer body 5. A support plate 34 is fixedly connected to the bottom of the fixing frame 32, and a T-shaped plate 35 is fixedly connected to the bottom of the support plate 34. A T-shaped shell 31 is inserted into the surface of the T-shaped plate 35, and the T-shaped shell 31 is fixedly connected to both sides of the bottom inside the shell 1. With the cooperation of the T-shaped shell 31 and the T-shaped plate 35, the initial positioning of the transformer body 5 can be achieved.

[0043] Furthermore, the support plate 34 extends towards the side closer to the transformer body 5. A limiting groove is provided in the support plate 34, and a limiting rod 33 is inserted into the limiting groove. The limiting rod 33 is fixedly connected to the rear side inside the housing 1. The limiting rod 33 has a cylindrical design. The T-shaped plate 35 can be inserted into the interior of the T-shaped housing 31, and at this time, the limiting rod 33 can be inserted into the limiting groove provided inside the support plate 34.

[0044] Furthermore, the surface of the limiting rod 33 is provided with threads, and a locking nut is threadedly connected to the surface of the limiting rod 33. The locking nut is located on the front side of the support plate 34. By threading the locking nut to the surface of the limiting rod 33, the transformer body 5 can be fixed, ensuring that the transformer body 5 will not shift randomly during operation.

[0045] Example 3:

[0046] See Figure 9-10 Furthermore, based on Embodiment 1 and Embodiment 2, the heat dissipation mechanism 4 further includes heat dissipation grooves, which are all opened on both sides of the housing 1. A rectangular shell 46 is fixedly connected inside the heat dissipation grooves. A condenser plate 43 is fixedly connected inside the rectangular shell 46. A blower fan 47 is fixedly connected to the side of the condenser plate 43 away from the transformer body 5. An output shaft is fixedly connected to the inner ring of the blower fan 47. A second motor 44 is fixedly connected to the side of the output shaft away from the condenser plate 43. The second motor 44 is located at the center of the rectangular shell 46. Under the rotation of the blower fan 47, external air can enter the interior of the housing 1 through the first dustproof net 42.

[0047] Furthermore, a connecting frame 45 is fixedly connected to the surface of the second motor 44. The connecting frame 45 is fixedly connected inside the rectangular shell 46 and rotatably connected to the surface of the output shaft. The connecting frame 45 can support and fix the second motor 44, preventing the second motor 44 from shaking during operation.

[0048] Furthermore, a groove is provided on the surface of the rectangular shell 46, and a first dustproof net 42 is inserted into the groove. A pull block 41 is fixedly connected to the front side of the first dustproof net 42. The pull block 41 is located on the front side of the rectangular shell 46. Under the action of the first dustproof net 42, external dust can be prevented from entering and affecting the use of the transformer body 5.

[0049] Furthermore, the number of condenser plates 43 is set in a certain way, and the condenser plates 43 are distributed at equal intervals. When air passes through the condenser plates 43, it will turn into cold air. At this time, the cold air fills the area around the transformer body 5 and can dissipate heat from the transformer body 5.

[0050] In actual operation, when this device is used, firstly, there is a sophisticated structure in the entire transformer installation system to ensure the convenient installation and disassembly process of the transformer body 5. First, we focus on the installation process. Through a specially designed mechanical device, the transformer body 5 is carefully placed on top of the support base 23. This support base 23 is carefully crafted and has sufficient strength and stability to bear the weight of the transformer body 5. In this process, the rollers 21 located at the bottom of the support base 23 begin to play a key role. The rollers 21 are placed in the slide rails 22 inside the mounting shell 25. These rollers 21 are well made, with smooth surfaces and hard materials, and can slide smoothly inside the slide rails 22.

[0051] When the roller 21 begins to slide inside the slide rail 22, the entire device is like starting a precise mechanical dance. The roller 21 moves slowly along the slide rail 22, and each roll brings the entire device one step closer to the goal of installation completion. When the roller 21 slides to the pre-set specific position, an important step is initiated - starting the first motor 206. The first motor 206, as the power source, has stable and efficient performance. After it is started, it can drive the spur gear 204 to rotate. This spur gear 204 is one of the core components of the entire transmission link. Its teeth are precision machined and maintain a perfect meshing state with the toothed plates 202 on both sides.

[0052] When the spur gear 204 starts to rotate, the precise meshing between its teeth and the toothed plate 202 demonstrates the charm of mechanical transmission. Due to this close meshing relationship, the rotational motion of the spur gear 204 can be quickly converted into the linear motion of the toothed plate 202, driving the toothed plates 202 on both sides to move in opposite directions. At this time, the carefully designed limiting parts 205 on both sides begin to play their role. These limiting parts 205 are perfectly matched with the surface design of the roller 21. When the toothed plate 202 moves into place, they are tightly fitted to the surface of the roller 21. This fit is not a simple contact, but a precise limiting mechanism that can effectively limit the roller 21 and ensure that the roller 21 will not have unnecessary displacement in the subsequent process, thereby ensuring the stability of the entire device.

[0053] Meanwhile, as the roller 21 slides inside the slide rail 22, other cooperating components also work together. Among them, the T-shaped plate can be accurately inserted into the interior of the T-shaped shell. This T-shaped structure design increases the stability and guidance of the connection. In addition, during this process, the limiting rod 33 can also be accurately inserted into the limiting groove opened inside the support plate 34. The size and shape of the limiting rod 33 are perfectly matched with the limiting groove. This precise fit ensures the firmness of the connection. Then, by connecting the locking nut to the surface of the limiting rod 33, this series of operations is like putting a solid "safety lock" on the entire installation process, which can fix the transformer body 5 in all directions. In this fixed state, even if the transformer body 5 is affected by various external forces during operation, such as slight vibration, there will be no random displacement, thus ensuring the normal operation of the transformer.

[0054] As can be seen from the detailed installation principle described above, when it is necessary to disassemble the transformer body 5, simply follow the reverse steps. This design, which facilitates installation and disassembly, greatly facilitates maintenance personnel in repairing the transformer body 5 when it is damaged. Maintenance personnel can quickly remove the transformer from its installation location and send it to a dedicated maintenance area for inspection and repair, effectively shortening maintenance time and reducing power outage time caused by transformer failure.

[0055] In addition to convenient installation and disassembly, this transformer system also has an excellent heat dissipation design to deal with the overheating problem that may occur when the transformer body 5 operates for a long time. When the transformer body 5 inside the housing 1 runs for a long time and its own heat gradually increases, the heat dissipation mechanism starts to start. The second motor 44 plays an important role in this process. The second motor 44 also has reliable performance. After starting, it can drive the fan 47 to rotate. The blades of the fan 47 are scientifically designed and can generate a stable and powerful airflow during rotation.

[0056] With the rotation of the fan 47, external air is continuously drawn in. The air first passes through the first dust filter 42, a crucial component. The first dust filter 42 has a fine mesh structure that effectively blocks dust particles from the external air. If this dust enters the casing 1, it may adhere to the surface or internal components of the transformer body 5, affecting its normal operation, such as reducing heat dissipation efficiency or causing electrical faults. After the dust-proofed air enters the casing 1, it continues to flow. When the air passes through the condenser plate 43, a remarkable physical change occurs. The condenser plate 43 uses special materials and design to rapidly reduce the air temperature, turning the air into cold air. This cold air quickly diffuses inside the casing 1, filling the area around the transformer body 5, like putting a "cool coat" on it. It effectively absorbs the heat emitted by the transformer body 5, thus efficiently dissipating heat. This heat dissipation method prevents the transformer body 5 from overheating and causing malfunctions, greatly extending its service life and ensuring the stable operation of the power system.

[0057] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A box-type combined transformer, comprising a base (6), characterized in that: The base (6) is fixedly connected to the top of the housing (1), the top of the housing (1) is fixedly connected to the second dustproof net (7), the bottom of the housing (1) is provided with an installation mechanism (2), the top of the installation mechanism (2) is provided with a transformer body (5), the two sides of the transformer body (5) are provided with fixing mechanisms (3), and the two sides of the housing (1) are provided with heat dissipation mechanisms (4). The installation mechanism (2) includes a support base (23), which is fixedly connected to the bottom of the housing (1). Mounting shells (25) are fixedly connected to both sides of the top of the support base (23). Connecting plates (24) are fixedly connected to the bottom of both sides of the mounting shells (25). The connecting plates (24) are fixedly connected to the top of the support base (23) by bolts. A slide rail (22) is fixedly connected inside the mounting shell (25). A roller (21) is slidably connected inside the slide rail (22). A support rod (28) is fixedly connected to the inner ring of the roller (21). A support frame (26) is rotatably connected to the surface of the support rod (28). The transformer body (5) The roller (21) is fixedly connected to the top of the support frame (26), the support frame (26) is set on the top of the support base (23), the roller (21) is provided with a limiting member (205), the limiting member (205) is fixedly connected with a toothed plate (202), the toothed plate (202) passes through the support frame (26), a spur gear (204) meshes between the two toothed plates (202), the inner ring of the spur gear (204) is fixedly connected to a first motor (206), the bottom of the first motor (206) is fixedly connected to a rectangular plate, the bottom of the rectangular plate is fixedly connected to a placement plate (27), and the placement plate (27) is fixedly connected to the middle of the top of the support base (23); The fixing mechanism (3) includes a fixing frame (32), which is fixedly connected to both sides of the transformer body (5). A support plate (34) is fixedly connected to the bottom of the fixing frame (32), and a T-shaped plate (35) is fixedly connected to the bottom of the support plate (34). A T-shaped shell (31) is inserted into the surface of the T-shaped plate (35), and the T-shaped shell (31) is fixedly connected to both sides of the bottom of the shell (1). The support plate (34) extends toward the side close to the transformer body (5). A limiting groove is provided in the support plate (34). A limiting rod (33) is inserted into the limiting groove. The limiting rod (33) is fixedly connected to the rear side of the housing (1). The limiting rod (33) is cylindrical. The limiting rod (33) has a threaded surface, and a locking nut is threadedly connected to the limiting rod (33) surface. The locking nut is located on the front side of the support plate (34).

2. A box-type combined transformer according to claim 1, characterized in that: The number of rollers (21) is four, the limiting member (205) is provided on the surface of the two rear rollers (21), and the two toothed plates (202) are provided on the top and bottom of the flat gear (204).

3. A box-type combined transformer according to claim 1, characterized in that: The toothed plate (202) is fixedly connected to a vertical plate (203) at the bottom. A circular groove is provided at the bottom of the vertical plate (203). A positioning rod (201) is slidably connected in the circular groove. The positioning rod (201) is fixedly connected to the surface of the placement plate (27). A connecting block (29) is fixedly connected to the side of the positioning rod (201) away from the placement plate (27).

4. A box-type combined transformer according to claim 1, characterized in that: The heat dissipation mechanism (4) includes heat dissipation slots, which are all opened on both sides of the housing (1). A rectangular shell (46) is fixedly connected inside the heat dissipation slots. A condenser plate (43) is fixedly connected inside the rectangular shell (46). A fan (47) is fixedly connected to the side of the condenser plate (43) away from the transformer body (5). An output shaft is fixedly connected to the inner ring of the fan (47). A second motor (44) is fixedly connected to the side of the output shaft away from the condenser plate (43). The second motor (44) is located at the center of the rectangular shell (46). A connecting frame (45) is fixedly connected to the surface of the second motor (44). The connecting frame (45) is fixedly connected to the rectangular shell (46). The connecting frame (45) is rotatably connected to the surface of the output shaft. A groove is opened on the surface of the rectangular shell (46). A first dustproof net (42) is inserted into the groove. A pull block (41) is fixedly connected to the front side of the first dustproof net (42). The pull block (41) is set on the front side of the rectangular shell (46). The number of condensing plates (43) is several, and the several condensing plates (43) are distributed at equal intervals.

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