Transformer magnetic core protection cover and transformer comprising same

Abstract

The transformer magnetic core protection cover comprises an insulating core tube and an insulating shell, the insulating shell is of a cover body structure with one end open, the insulating core tube is arranged in the middle of the interior of the insulating shell, and the insulating core tube and the inner wall of the insulating shell form a containing space used for containing a transformer magnetic core; the utility model further provides a transformer comprising the transformer magnetic core protection cover. According to the transformer magnetic core protection cover, a multi-magnetic-core assembly structure can be compact, the manufacturing cost is low, the manufacturing difficulty of a transformer can be reduced, the production efficiency can be improved, the defect that injected insulating core tube heat-conducting glue is not uniform can be overcome, the safety of the transformer is improved, and the service life of the transformer is prolonged.

Description

Technical Field

[0001] This application relates to the technical field of high-frequency transformers, and particularly to a transformer core protection cover and a transformer including the same. Background Art

[0002] During the manufacturing process of high-frequency transformers, it is usually necessary to use insulating core tube materials to completely isolate the transformer core and coil from the aluminum alloy insulating housing of the transformer. In the case of multiple cores, insulating core tube materials are needed to separate the cores from each other to avoid magnetic circuit crosstalk affecting the performance of the transformer. After being fixed, insulating core tube thermal conductive glue is injected into the transformer to completely reinforce and seal the transformer core, coil and electrical components, playing roles such as vibration prevention, moisture prevention, insulation core tube, heat insulation, noise reduction, etc., and improving the reliability and durability of the transformer. The current common practice is to lay a gold film inside the aluminum alloy insulating housing of the transformer to isolate the transformer core and coil from the aluminum alloy insulating housing of the transformer. Due to the narrow operating space, it is difficult to fix the gold film, resulting in low manufacturing efficiency of the transformer. During assembly, it is easy to cause the film to be scratched, which may lead to contact between the coil and the aluminum alloy insulating housing, forming a potential safety hazard. In the case of multiple cores, mica sheets are needed to separate the cores. The mica sheets are not easy to fix, and multiple mica sheet layers make the injected insulating core tube thermal conductive glue have poor fluidity and it is difficult to completely fill the inside of the transformer, reducing the reliability and durability of the transformer. Summary of the Utility Model

[0003] To solve the above technical problems, the present utility model provides a transformer core protection cover and a transformer including the same. The transformer core protection cover can make the multi-core assembly structure compact, with low manufacturing cost, reduce the manufacturing difficulty of the transformer, improve production efficiency, and can solve the disadvantage of uneven injection of insulating core tube thermal conductive glue, improving the safety and service life of the transformer.

[0004] The technical solution provided by the present utility model is as follows:

[0005] A transformer core protection cover includes an insulating core tube and an insulating housing. The insulating housing is a cover structure with one end open. The insulating core tube is arranged in the middle inside the insulating housing, and a containing space for containing the transformer core is formed between the insulating core tube and the inner wall of the insulating housing.

[0006] Preferably, an operation hole for facilitating the adjustment of the placement position of the transformer core is provided on the side wall of the insulating housing.

[0007] Preferably, an assembly card slot with a step and a depth not exceeding 10 mm is provided on the inner side wall of the open end of the insulating housing, and the step width of the assembly card slot is 1 - 2 mm.

[0008] Preferably, a plurality of through holes are provided on the insulating housing.

[0009] Preferably, the through hole has an L-shaped structure and is uniformly arranged along the side surface and the bottom surface of the insulating housing.

[0010] Preferably, a ring-shaped reinforcing rib is provided at the bottom of the insulating housing.

[0011] Preferably, the thickness of the insulating housing is 3-5 mm.

[0012] Preferably, the insulating core tube has a cylindrical structure and the insulating housing has a cylindrical structure.

[0013] A transformer includes a plurality of the above-mentioned transformer core protection covers, insulating protection covers, cover plates, a plurality of transformer cores and a housing. The plurality of transformer cores are located within the plurality of transformer core protection covers and are stacked within the housing. The insulating protection cover and the cover plate are sequentially arranged at the open end of the outermost transformer core protection cover, and the insulating protection cover is on the inner side and the cover plate is on the outer side.

[0014] The present application has the following advantages over the prior art:

[0015] Through the arrangement of the insulating core tube and the insulating housing, the transformer core protection cover of the present application can make the multi-core assembly structure compact, with low manufacturing cost, reduce the manufacturing difficulty of the transformer, improve the production efficiency, solve the disadvantage of uneven heat-conducting glue injected into the insulating core tube, and improve the safety and service life of the transformer. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of the transformer core protection cover in the embodiment of the present utility model;

[0018] Figure 2 It is a schematic structural diagram during the assembly of the transformer in the embodiment of the present utility model;

[0019] Figure 3 It is a schematic structural diagram after the assembly of the transformer in the embodiment of the present utility model.

[0020] Reference Signs:

[0021] 1. Insulated core tube; 2. Insulated outer shell; 21. Operation hole; 22. Assembly card slot; 23. Through hole; 24. Reinforcing rib; 3. Transformer core; 4. Transformer core protection cover; 5. Insulated protection cover; 6. Cover plate; 7. Housing. Detailed implementation manners

[0022] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0023] As Figures 1-3 shown, the embodiment of the present utility model provides a transformer core protection cover, which includes an insulated core tube 1 and an insulated outer shell 2. The insulated outer shell 2 is a cover body structure with one end open. The insulated core tube 1 is arranged in the middle inside the insulated outer shell 2, and an accommodation space for accommodating the transformer core 3 is formed between the insulated core tube 1 and the inner wall of the insulated outer shell 2. The transformer core protection cover in this embodiment is an integrally formed insulated plastic housing, which has a beautiful appearance and low manufacturing cost.

[0024] In this embodiment, an operation hole 21 for facilitating the adjustment of the placement position of the transformer core 3 is provided on the side wall of the insulated outer shell 2. An assembly card slot 22 with a step and a depth not exceeding 10 mm is provided on the inner side wall of the open end of the insulated outer shell 2. The step width of the assembly card slot 22 is 1.5 mm, and the assembly card slot 22 enables two adjacent transformer core protection covers to be tightly assembled. A plurality of through holes 23 are provided on the insulated outer shell 2, and the through holes 23 can ensure good fluidity of the insulated thermal conductive adhesive. The through holes 23 are in an L-shaped structure and are uniformly arranged along the side and bottom of the insulated outer shell 2. A ring-shaped reinforcing rib 24 is provided at the bottom of the insulated outer shell 2, and the reinforcing rib 24 protruding from the bottom can increase the wall thickness to form an isolation between the transformer cores 3. The thickness of the insulated outer shell 2 is 4 mm.

[0025] In this embodiment, the insulated core tube 1 is in a cylindrical structure, and the insulated outer shell 2 is in a cylindrical structure.

[0026] A transformer includes a plurality of the above-mentioned transformer core protection covers 4, insulating protection covers 5, cover plates 6, a plurality of transformer cores 3 and a housing 7. The plurality of transformer cores 3 are placed inside the plurality of transformer core protection covers and stacked inside the housing 7. The insulating outer shell 2 has a sufficient wall thickness to ensure that when assembled, the outer wall of the transformer core 3 wrapped by it will not be damaged by contact friction with the housing 7, and the coil is not exposed. The insulating protection cover 5 and the cover plate 6 are sequentially arranged at the open end of the outermost transformer core protection cover 4, and the insulating protection cover 5 is on the inner side and the cover plate 6 is on the outer side. Both the housing 7 and the cover plate 6 are made of aluminum alloy structure.

[0027] In this embodiment, the transformer core 3 is placed into the transformer core protection cover 4, and the insulating core tube 1 fixes the position of the transformer core 3. This is a set of cores. After fixing one side of the cover plate 6 and the housing 7, a set of cores is pressed into the cavity of the housing 7 (when the plurality of transformer cores 3 and the housing 7 are assembled, the front-end gap of the insulating core tube 1 is squeezed, the diameter becomes smaller, and it automatically slides into the inner wall of the previous insulating core tube 1). Multiple sets of cores are pressed into the housing 7 and clamped in position. An insulating protection cover 5 is snapped into the assembly slot 22 of the insulating protection cover 4 of the last set of cores, and then the other side cover plate 6 is sealed. Finally, insulating thermal conductive glue is injected through the hole left at the top of the transformer until the cavity of the housing 7 is completely filled.

[0028] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A transformer core protection cover, characterized in that: The invention comprises an insulating core tube (1) and an insulating shell (2); the insulating shell (2) is a cover structure with one end open; the insulating core tube (1) is arranged in the middle of the insulating shell (2); the insulating core tube (1) and the inner wall of the insulating shell (2) form an accommodation space for accommodating a transformer magnetic core (3).

2. The transformer core protection cover according to claim 1, characterized in that: An operating hole (21) for facilitating adjustment of the placement position of the transformer magnetic core (3) is provided on the side wall of the insulating housing (2).

3. The transformer core protection cover according to claim 1, characterized in that: An assembly slot (22) with a step and a depth not exceeding 10 mm is provided on the inner side wall of the open end of the insulating housing (2), and the step width of the assembly slot (22) is 1 to 2 mm.

4. The transformer core protection cover according to claim 1, characterized in that: The insulating housing (2) is provided with a plurality of through holes (23).

5. The transformer core protection cover according to claim 4, characterized in that: The through holes (23) are in an L-shaped structure, and the through holes (23) are evenly arranged along the side surfaces and bottom surface of the insulating housing (2).

6. The transformer core protection cover according to claim 1, characterized in that: The bottom of the insulating shell (2) is provided with an annular reinforcing rib (24).

7. The transformer core protection cover according to claim 1, characterized in that: The thickness of the insulating shell (2) is 3 to 5 mm.

8. The transformer core protection cover according to any one of claims 1 to 7, characterized in that: The insulating core tube (1) is a cylindrical structure, and the insulating shell (2) is a cylindrical structure.

9. A transformer, characterized in that: The invention comprises a plurality of transformer core protection covers (4), an insulating protection cover (5), a cover plate (6) as claimed in any one of claims 1 to 8, a plurality of transformer cores (3) and a shell (7), wherein the plurality of transformer cores (3) are located in the plurality of transformer core protection covers (4) and are stacked in the shell (7), and the insulating protection cover (5) and the cover plate (6) are sequentially arranged at the open end of the outermost transformer core protection cover (4), with the insulating protection cover (5) being located on the inner side and the cover plate (6) being located on the outer side.

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