Sealing coil of high-power reactor

Abstract

The utility model relates to the technical field of electric reactors, in particular to a high-power electric reactor sealing coil which comprises a plurality of iron cores, the iron cores are arranged in a mutually stacked mode, the iron cores are wrapped by a wrapping layer, a winding layer is wound on the outer rings of the iron cores to form a multi-layer turn structure, and a sealing portion is arranged on the winding layer. According to the coil, the high coil protection level can be achieved, the coil can be used in the severe environment, the service life of a product is greatly prolonged, during winding, sealing insulation paper can be added, a polyester heat-shrinkable tape can be used for sealing the cavity in the coil, operation is easy, the production efficiency is greatly improved, and materials are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of reactors, in particular to a sealed coil of a high-power reactor. Background Art

[0002] Transformers and reactors are indispensable components in new energy industries such as power distribution and energy storage. In application scenarios such as photovoltaic and wind power, the operating environment is extremely harsh. For example, when used in sea areas, deserts and other places, dust particles can cause short circuits of products, and salts and humidity in the air can corrode products, which will seriously affect the service life of reactors and transformers. Therefore, it is essential to improve the protection level of reactors and transformers.

[0003] In the manufacturing industry of magnetic components, open dry reactors (transformers) operate naturally without problems in ordinary environments or in cabinets. However, with the rapid development of the new energy industry, the operating environment is becoming more and more harsh. For example, in environments such as the ocean and desert (wind power and solar power generation), problems such as high temperature, high humidity, high corrosion, and a large number of dust particles seriously affect the product life. Although epoxy resin cast reactors (transformers) can be used, their cost is high and their volume is large, which is not worth the loss for the new energy industry. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a sealed coil of a high-power reactor to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A sealed coil of a high-power reactor includes a plurality of iron cores. The plurality of iron cores are stacked on top of each other. The plurality of iron cores are coated with a coating layer. A winding layer is wound around the outer circle of the plurality of iron cores to form a multi-layer turn structure, and a sealing part is arranged on the winding layer.

[0007] Preferably, the coating layer is an aluminum plate.

[0008] Preferably, one end of the winding layer is connected with a starting aluminum bar terminal, and the other end of the winding layer is connected with an end aluminum bar terminal.

[0009] Preferably, the winding layer includes foil and insulating paper, and the foil between adjacent two turn structures is separated by the insulating paper.

[0010] Preferably, the plurality of iron cores are fixed by L-shaped fixing bars arranged at the four top corners of the iron cores.

[0011] Preferably, cavities are formed between the winding layer, the starting aluminum bar terminal and the L-shaped fixing bars, and between the winding layer and the end aluminum bar terminal during winding, and the cross-section of the cavity is in a triangular structure.

[0012] Preferably, an air duct is formed between two adjacent turn structures through a support member.

[0013] Preferably, the sealing part includes sealing insulating paper, polyester heat-shrinkable tape and insulating gasket paper. The insulating gasket paper is arranged at the exposed part of the inner foil in the air duct. The polyester heat-shrinkable tape is filled in the cavity, and the insulating gasket paper is arranged at the ends of the insulating gasket paper and the polyester heat-shrinkable tape.

[0014] Preferably, connecting members are arranged on both the starting aluminum busbar terminal and the ending aluminum busbar terminal, and the connecting members are used to quickly connect the starting aluminum busbar terminal and the ending aluminum busbar terminal to a wire or a cable.

[0015] Preferably, bending parts are rotatably connected to both sides of the substrate through rotating shafts. A limiting part is arranged at the end of the bending part. One of the bending parts is slidably connected with a sliding cover through a sliding groove. A guiding column is sleeved on the sliding cover. An extrusion seat is arranged at the bottom end of the guiding column. A protrusion is arranged on one side of the upper surface of the extrusion seat. A clamping groove corresponding to the protrusion is formed at the bottom of the limiting part. A notch is formed on one side of the sliding cover.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] By arranging the sealing part, the protection level of the coil is improved, so that the product can be used in a harsh environment, greatly improving the product life. During winding, sealing insulating paper can be added, and the polyester heat-shrinkable tape is used to seal the cavity on the coil. The operation is simple, greatly improving the production efficiency, saving materials, and not requiring any tooling fixtures; compared with the epoxy casting type reactor, it does not require potting, casting fixtures and materials, and the winding process is simple with low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional view of the overall structure of the present utility model;

[0019] Figure 2 is a top view of the present utility model;

[0020] Figure 3 is a front view of the present utility model;

[0021] Figure 4 is a schematic structural diagram of Embodiment II of the present utility model;

[0022] Figure 5 is Figure 4 an enlarged view of the structure at A in

[0023] Figure 6 is Figure 4 a split view of the structure at A in

[0024] In the figure:

[0025] 1. Iron core; 2. Coating layer; 3. Cavity; 4. Starting aluminum bar terminal; 5. End aluminum bar terminal; 6. Sealing part; 7. Winding layer; 701. Foil; 702. Insulating paper; 8. Air duct; 9. Support; 10. Substrate; 11. Bending part; 12. Limiting part; 13. Slide cover; 14. Chute; 15. Guide post; 16. Extrusion seat; 17. Protrusion; 18. Card slot; 19. Notch. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Embodiment 1, please refer to Figures 1-3 , the present invention provides a technical solution:

[0028] A sealed coil of a high-power reactor, the whole coil is vacuum impregnated with varnish and sprayed with three-proof paint. Through the vacuum impregnation process, the whole coil is sealed and the aluminum foil does not leak out.

[0029] As Figure 1 shown, the coil includes a plurality of iron cores 1, the plurality of iron cores 1 are stacked on top of each other, and the plurality of iron cores 1 are fixed by L-shaped fixing bars provided at the four top corners of the iron core 1. A coating layer 2 is provided on the surfaces of the plurality of iron cores 1. Among them, the coating layer 2 is an aluminum plate. By using an aluminum plate, the heat conduction efficiency can be improved and the heat dissipation can be accelerated. A winding layer 7 is wound around the outer circle of the plurality of iron cores 1 and forms a multi-layer turn structure. Two sealing parts 6 are provided on the winding layer 7, and the sealing parts 6 are symmetrically arranged. One end of the winding layer 7 is connected to a starting aluminum bar terminal 4, and the other end of the winding layer 7 is connected to an end aluminum bar terminal 5.

[0030] As Figure 2 and Figure 3 shown, the winding layer 7 includes a foil 701 and an insulating paper 702, and the foils 701 between two adjacent turn structures are separated by the insulating paper 702. Among them, the foil 701 is an aluminum foil or a copper foil. In this embodiment, the foil 701 is an aluminum foil.

[0031] As Figure 2 shown, a cavity 3 is formed between the winding layer 7, the starting aluminum bar terminal 4 and the L-shaped fixing bar and between the winding layer 7 and the end aluminum bar terminal 5 during winding, and the cross-section of the cavity 3 is in a triangular structure.

[0032] An air duct 8 is formed between two adjacent turn structures through a support 9.

[0033] The sealing part 6 includes a sealing insulating paper, a polyester heat-shrinkable tape and an insulating gasket paper. The insulating gasket paper is arranged at the exposed part of the foil 701 in the air duct 8. The polyester heat-shrinkable tape is filled in the cavity 3. The insulating gasket paper is arranged at the end of the insulating gasket paper and the polyester heat-shrinkable tape. With the cooperation of the above structures, the foil 701 is not exposed to the air, meeting the requirements of high-grade protection.

[0034] It should be noted that the sealing insulating paper, the insulating gasket paper and the insulating paper 702 are AMA papers. The AMA insulating paper is an F-class heat-resistant insulating paper with a temperature resistance of 155 °C, having good flexibility, excellent mechanical strength, dielectric properties, tear resistance and paint absorption ability.

[0035] Embodiment 2, please refer to Figures 4-6 , the present utility model provides another technical solution:

[0036] Compared with Embodiment 1, the difference between Embodiment 2 and Embodiment 1 is that, as Figure 4 shown, connection members are provided on both the starting aluminum bar terminal and the ending aluminum bar terminal. The connection members are used to quickly connect the starting aluminum bar terminal and the ending aluminum bar terminal with a wire or a cable.

[0037] As Figures 5-6 shown, the connection member includes a substrate 10. Both sides of the substrate 10 are rotatably connected with bending parts 11 through rotating shafts. Limiting parts 12 are arranged at the ends of the bending parts 11. A cavity for placing a wire or a cable and the starting aluminum bar terminal or the ending aluminum bar terminal is formed between the limiting parts 12 and the bending parts 11. The limiting part 12 has a right-angled trapezoid structure. One of the bending parts 11 is slidably connected with a sliding cover 13 through a chute 14. A rod body corresponding to the chute 14 is arranged on the sliding cover 13. A guiding column 15 is sleeved on the sliding cover 13. An extrusion seat 16 is arranged at the bottom end of the guiding column 15. The extrusion seat 16 has an inclined side with the same inclination as the limiting part 12. A protrusion 17 is arranged on one side of the upper surface of the extrusion seat 16. A clamping groove 18 corresponding to the protrusion 17 is opened at the bottom of the limiting part 12. A notch 19 is opened on one side of the sliding cover 13.

[0038] When connecting the starting aluminum busbar terminal or the ending aluminum busbar terminal to a wire or cable, insert the starting aluminum busbar terminal or the ending aluminum busbar terminal and the wire or cable into the cavity formed between the limiting portion 12 and the bending portion 11. Then, push the bending portion 11 to bend it by the two bending portions 11. Then, one of the limiting portions 12 and the bending portion 11 pass through the notch 19 and enter the inside of the sliding cover 13. Then, push the sliding cover 13 to make the extrusion seat 16 start to move downward under the guidance of the inclined surface. The extrusion seat 16 can make the starting aluminum busbar terminal or the ending aluminum busbar terminal fit tightly with the wire or cable until the protrusion 17 is snapped into the card slot 18. With the cooperation of the above structures, it is convenient for workers to quickly connect the starting aluminum busbar terminal or the ending aluminum busbar terminal to the wire or cable, and at the same time, it can avoid the phenomenon of falling off.

[0039] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-power reactor sealed coil, comprising a plurality of iron cores, wherein the plurality of iron cores are stacked on top of each other, and is characterized in that, Multiple of the iron cores are coated with a coating layer. A winding layer is wound around the outer circles of the multiple iron cores to form a multi-layer turn structure, and a sealing portion is provided on the winding layer.

2. The sealed coil of a high-power reactor according to claim 1, characterized in that, The coating layer is an aluminum plate.

3. A high-power reactor sealed coil according to claim 1, characterized in that, One end of the winding layer is connected with a starting aluminum busbar terminal, and the other end of the winding layer is connected with an end aluminum busbar terminal.

4. A high-power reactor sealed coil according to claim 1, characterized in that The winding layer includes foil and insulating paper, and the foil between adjacent two turn structures is separated by the insulating paper.

5. A high-power reactor sealed coil according to claim 1, characterized in that The multiple iron cores are fixed by L-shaped fixing bars arranged at the four top corners of the iron cores.

6. The sealed coil of a high-power reactor according to claim 5, characterized in that, A cavity is formed among the winding layer, the starting aluminum busbar terminal and the L-shaped fixing bar and between the winding layer and the end aluminum busbar terminal during winding, and the cross section of the cavity is in a triangular structure.

7. The sealed coil of a high-power reactor according to claim 6, characterized in that, An air duct is formed between adjacent two turn structures through a support member.

8. A sealed coil of a high-power reactor according to claim 7, characterized in that, The sealing portion includes sealing insulating paper, a polyester heat-shrinkable tape and insulating gasket paper. The insulating gasket paper is arranged at the exposed part of the foil in the air duct. The polyester heat-shrinkable tape is filled in the cavity, and the insulating gasket paper is arranged at the ends of the insulating gasket paper and the polyester heat-shrinkable tape.

9. The sealed coil of a high-power reactor according to claim 3, characterized in that, Connectors are provided on both the starting aluminum busbar terminal and the end aluminum busbar terminal, and the connectors are used to quickly connect the starting aluminum busbar terminal and the end aluminum busbar terminal with a wire or a cable.

10. A sealed coil of a high-power reactor according to claim 9, characterized in that, The connector includes a substrate. Both sides of the substrate are rotatably connected with bending portions through rotating shafts. A limiting portion is arranged at the end of the bending portion. One of the bending portions is slidably connected with a sliding cover through a chute. A guiding column is sleeved on the sliding cover. An extrusion seat is arranged at the bottom end of the guiding column. A protrusion is arranged on one side of the upper surface of the extrusion seat. A clamping groove corresponding to the protrusion is formed at the bottom of the limiting portion. A notch is formed on one side of the sliding cover.

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