Dry-type transformer

Abstract

The utility model discloses a dry-type transformer which comprises a base, a plurality of coil windings fixed on the base at equal intervals and heat dissipation fans arranged on two sides of the coil windings, heat conduction blocks are arranged on two sides of the outer wall of each coil winding, a plurality of heat dissipation fins arranged at equal intervals are arranged on the outer wall of each heat conduction block, and the heat dissipation fins are arranged on the outer wall of each heat conduction block. And the base is provided with a drainage plate and is arranged below the coil winding. The contact area with air is increased through the heat dissipation fins, the temperature of the coil winding is further reduced under the natural air cooling condition, the air is conveyed to the drainage part through the heat dissipation fan, the drainage part and the partition plates dredge disturbed airflow, cooling air sequentially passes through the heat dissipation fins, the temperature of the coil winding is further rapidly reduced, and the service life of the coil winding is prolonged. Cooling air is guided to extend towards the two sides through the flow expanding plates, so that the cooling air flows through more heat dissipation fins, the heat dissipation efficiency is further improved, and the product has the advantages of improving the heat dissipation efficiency and effectively controlling the temperature.

Description

Technical Field

[0001] The utility model relates to the technical field of dry-type transformers, in particular to a dry-type transformer. Background Art

[0002] Dry-type transformers are widely used in local lighting, high-voltage buildings, airports, docks, CNC machinery and equipment and other places. Simply put, dry-type transformers refer to transformers whose cores and windings are not immersed in insulating oil. The cooling methods of dry-type transformers are divided into natural air cooling (AN) and forced air cooling (AF). When the transformer is cooled by natural air, it can operate continuously for a long time at rated capacity; when the transformer is cooled by forced air, the output capacity of the transformer can be increased by 50%, which is suitable for intermittent overload operation or emergency overload operation. Due to the large increase in load loss and impedance voltage during overload, it is in a non-economic operation state, so it should not be operated continuously for a long time under overload.

[0003] Since the heat dissipation effect of the coil winding in the dry-type transformer is not ideal, it is very easy to reach the coil temperature threshold during operation, thereby triggering the forced air cooling mode of the dry-type transformer, which not only increases the operating load of the dry-type transformer, but also fails to quickly reduce the temperature of the coil winding, thereby affecting the life of the coil winding. Therefore, the applicant has made a beneficial design and found a solution to the above problem. The technical solution to be introduced below is produced in this context. Summary of the invention

[0004] The purpose of the utility model is to overcome the shortcomings of the above-mentioned traditional dry-type transformer design and provide a product with improved heat dissipation efficiency and effective temperature control.

[0005] To solve the above problems, the utility model adopts the following technical solutions.

[0006] A dry-type transformer comprises a base, a plurality of equally spaced coil windings fixed on the base, and heat dissipation fans arranged on both sides of the coil windings, heat conduction blocks are arranged on both sides of the outer wall of the coil windings, a plurality of equally spaced heat dissipation fins are arranged on the outer wall of the heat conduction blocks, a flow guide plate is arranged on the base and is arranged below the coil windings and between the heat dissipation fans, flow guide portions extending inward are arranged on both sides of the flow guide plate, partitions are arranged between the flow guide portions, and flow expansion plates are arranged on both sides of the coil windings and extend outward to below the heat dissipation fins.

[0007] Preferably, the base is provided with a support frame, and is arranged on both sides of the guide plate, and the support frame is provided with a plurality of ventilation holes with equal intervals from top to bottom.

[0008] Preferably, the diffuser plates are mounted and fixed on both sides of the inner wall of the support frame.

[0009] Preferably, iron yokes are provided at both ends of the coil winding, the iron yokes are arranged between the partitions, and the coil winding is mounted and fixed on the support frame.

[0010] Preferably, the inner wall of the heat conductive block is provided with a fitting portion and fits against the coil winding. The heat conductive block is provided with a mounting hole and is fixed to the outer wall of the coil winding by screws.

[0011] Preferably, the drainage portion is arranged in an arc shape, and the drainage portion is arranged at the air outlet of the ventilation hole at the bottom of the support frame. The drainage portion is extended to be provided with a correction portion, and is vertically arranged on the drainage plate.

[0012] Beneficial effects:

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model, when in natural air cooling, increases the contact area with the air through the heat dissipation fins, thereby reducing the temperature of the coil winding under natural air cooling; when in forced air cooling, the heat dissipation fan conveys air to the drainage part, the drainage part guides the direction of the cooling air, the partition and the iron yoke prevent the winds delivered by the heat dissipation fans located on both sides of the coil winding from colliding, causing turbulence, and the cooling air passes through the heat dissipation fins in an orderly manner through the drainage part, and exchanges heat with the heat dissipation fins, thereby effectively controlling the temperature of the coil winding; at the same time, in order to maximize the effect of the heat dissipation fins, the cooling air is guided to extend to both sides through the flow expansion plate, so that the cooling air flows through more heat dissipation fins, further improving the heat dissipation efficiency, thereby reducing the startup time of the heat dissipation fan, and through the above-mentioned optimization of the structure, the frequency and time of the startup of the heat dissipation fan are reduced, and the operating load of the dry-type transformer is reduced, so that the product has the advantages of improving heat dissipation efficiency and effective temperature control. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a dry-type transformer of the utility model;

[0016] Figure 2 This is a left view of a dry-type transformer of the utility model;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of a dry-type transformer of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of a heat-conducting block of a dry-type transformer of the utility model;

[0019] The corresponding relationship between the various figure labels and component names in the figure is as follows:

[0020] Figure numerals: 1. base; 2. coil winding; 3. heat dissipation fan; 4. heat conductive block; 5. drainage plate; 6. flow expansion plate; 11. support frame; 12. ventilation hole; 21. iron yoke; 41. heat dissipation fin; 42. fitting part; 43. mounting hole; 51. drainage part; 52. partition; 53. correction part. DETAILED DESCRIPTION

[0021] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0023] In the embodiment of the present invention, "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0024] Reference example Figures 1 to 4 A dry-type transformer comprises a base 1, a plurality of equally spaced coil windings 2 fixed on the base 1, and a heat dissipation fan 3 arranged on both sides of the coil winding 2, heat conduction blocks 4 are arranged on both sides of the outer wall of the coil winding 2, and a plurality of equally spaced heat dissipation fins 41 are arranged on the outer wall of the heat conduction block 4, a flow guide plate 5 is arranged on the base 1, and is arranged below the coil winding 2, and is arranged between the heat dissipation fans 3, and both sides of the flow guide plate 5 are provided with inwardly extending flow guide portions 51, and partitions 52 are arranged between the flow guide portions 51, and both sides of the coil winding 2 are provided with flow expansion plates 6, and extend outward to the bottom of the heat dissipation fins 41, when in natural air cooling, the heat dissipation fins 41 increase the contact area with the air, and reduce the temperature of the coil winding 2 in the natural air cooling state;

[0025] It is worth mentioning that the base 1 is provided with a support frame 11, and is arranged on both sides of the guide plate 5. The support frame 11 is provided with a plurality of equally spaced ventilation holes 12 from top to bottom. The support frame 11 provides support for the coil winding 2 and the flow expansion plate 6. The ventilation holes 12 facilitate the cooling air output by the heat dissipation fan 3 to enter between the support frames 11;

[0026] It is worth mentioning that the diffuser plate 6 is installed and fixed on both sides of the inner wall of the support frame 11. In order to maximize the effect of the heat dissipation fins 41, the diffuser plate 6 guides the cooling air to extend to both sides, so that the cooling air flows through more heat dissipation fins 41, further improving the heat dissipation efficiency, thereby effectively controlling the temperature rise of the coil winding 2;

[0027] It is worth mentioning that iron yokes 21 are provided at both ends of the coil winding 2, and the iron yokes 21 are arranged between the partitions 52. The coil winding 2 is installed and fixed on the support frame 11. The partitions 52 and the iron yokes 21 both prevent the air ducts delivered by the heat dissipation fans 3 located on both sides of the coil winding 2 from colliding with each other, causing turbulence to occur, thereby improving the heat dissipation efficiency of the heat dissipation fans 3. At the same time, when the cooling air blows toward the iron yoke 21, the temperature rise of the iron yoke 21 is also controlled;

[0028] It is worth mentioning that the inner wall of the heat conductive block 4 is provided with a fitting portion 42, which fits the coil winding 2. The heat conductive block 4 is provided with a mounting hole 43, and is fixed to the outer wall of the coil winding 2 by screws. The fitting portion 42 completely fits the outer wall of the coil winding 2, thereby improving the heat conduction efficiency.

[0029] It is worth mentioning that the guide portion 51 is arranged in an arc shape, and the guide portion 51 is arranged at the air outlet of the ventilation hole 12 at the bottom of the support frame 11. The guide portion 51 is extended with a correction portion 53 and is vertically arranged on the guide plate 5. The arc-shaped guide plate 5 corrects the direction of the cooling air, and the correction portion 53 guides the cooling air to flow upward.

[0030] The forced air cooling mode of the utility model is now described as follows:

[0031] When the coil winding 2 reaches the temperature threshold, the cooling fan 3 starts to draw external air through the ventilation hole 12. The cooling air is guided by the guide part 51 and the correction part 53, so that the cooling air flows through the cooling fins 41 in an orderly manner and generates heat exchange with the cooling fins 41, thereby controlling the temperature rise of the coil; after part of the cooling air is blown to the partition 52 and the iron yoke 21, it will be bent to the expansion plate 6. After being guided by the expansion plate 6, this part of the cooling air flows through more cooling fins 41, thereby further improving the heat dissipation efficiency, reducing the startup time and startup frequency of the cooling fan 3, and reducing the operating load of the dry-type transformer. For the specific direction of the cooling air, please refer to the attached Figure 2 shown.

[0032] The above design scheme can enable the product to achieve the advantages of improved heat dissipation efficiency and effective temperature control.

[0033] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. A dry-type transformer, comprising a base (1), a plurality of equally spaced coil windings (2) fixed on the base (1), and a heat dissipation fan (3) arranged on both sides of the coil windings (2), characterized in that: Heat-conducting blocks (4) are provided on both sides of the outer wall of the coil winding (2), and a plurality of heat-dissipating fins (41) are provided on the outer wall of the heat-conducting block (4) at equal intervals. The base (1) is provided with a guide plate (5) which is arranged below the coil winding (2) and between the heat-dissipating fans (3). Guide portions (51) extending inward are provided on both sides of the guide plate (5), and partitions (52) are provided between the guide portions (51). Diffuser plates (6) are provided on both sides of the coil winding (2) and extend outward to below the heat-dissipating fins (41).

2. The dry-type transformer according to claim 1, characterized in that: The base (1) is provided with a support frame (11) and is arranged on both sides of the guide plate (5); the support frame (11) is provided with a plurality of ventilation holes (12) at equal intervals from top to bottom.

3. The dry-type transformer according to claim 2, characterized in that: The flow diffusion plates (6) are mounted and fixed on both sides of the inner wall of the support frame (11).

4. The dry-type transformer according to claim 2, characterized in that: Iron yokes (21) are provided at both ends of the coil winding (2), the iron yokes (21) are arranged between partitions (52), and the coil winding (2) is mounted and fixed on a support frame (11).

5. The dry-type transformer according to claim 3, characterized in that: The inner wall of the heat conductive block (4) is provided with a fitting portion (42) and fits the coil winding (2); the heat conductive block (4) is provided with a mounting hole (43) and is fixed to the outer wall of the coil winding (2) by means of screws.

6. The dry-type transformer according to claim 5, characterized in that: The drainage portion (51) is arranged in an arc shape, and is arranged at the air outlet of the ventilation hole (12) at the bottom of the support frame (11). The drainage portion (51) is extended to be provided with a correction portion (53) and is arranged vertically on the drainage plate (5).

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