Transformer coil insulation structure

Abstract

The utility model relates to the field of transformer coil insulation, and discloses a transformer coil insulation structure which comprises a base, an installation groove is formed in the top face of the base, a primary coil is detachably arranged in the installation groove, a secondary coil is detachably arranged in the installation groove, and the primary coil and the secondary coil are detachably arranged in the installation groove. An inner-layer copper foil is arranged between the primary coil and the secondary coil, inner-layer insulation paper is arranged on the two sides of the inner-layer copper foil respectively, outer-layer insulation paper is arranged above the base, the inner wall face of the outer-layer insulation paper is arranged on the surfaces of the primary coil and the secondary coil in a sleeving mode, an outer-layer copper foil is arranged on the surface of the outer-layer insulation paper in a sleeving mode, and the outer-layer copper foil is arranged on the surface of the outer-layer insulation paper in a sleeving mode. The inner layer insulation paper and the outer layer insulation paper are adhesive dispensing paper AFA. According to the transformer, due to the fact that the inner layer insulation paper and the outer layer insulation paper are both made of the adhesive dispensing paper AFA, the inner layer insulation paper and the outer layer insulation paper supported by the adhesive dispensing paper AFA have higher breakdown voltage which can reach more than 9KV, and the use safety of the transformer is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer coil insulation, and specifically relates to a transformer coil insulation structure. Background Art

[0002] The transformer coil insulation structure refers to a key component used to isolate the high-voltage and low-voltage parts in a transformer and prevent faults such as current leakage and short circuits. As the heart of the transformer, the design of the insulation structure and the selection of materials for the coil are directly related to the performance and safe operation of the transformer.

[0003] In the prior art, the interlayer insulation of the low-voltage foil-wound coil usually uses dotting paper DDP for support, resulting in the following disadvantages: The breakdown voltage of the dotting paper DDP can usually only reach about 3 KV, which reduces the safety of the transformer during use from the perspective of electrical strength. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a transformer coil insulation structure to solve the problem that in the prior art, the breakdown voltage of the dotting paper DDP can usually only reach about 3 KV, which reduces the safety of the transformer during use from the perspective of electrical strength.

[0005] To achieve the above utility model purpose, the utility model adopts the following technical scheme: A transformer coil insulation structure includes a base. An installation groove is formed on the top surface of the base. A primary coil is detachably arranged inside the installation groove, and a secondary coil is detachably arranged inside the installation groove. An inner copper foil is arranged between the primary coil and the secondary coil. Inner insulating papers are respectively arranged on both sides of the inner copper foil. An outer insulating paper is arranged above the base. The inner wall surface of the outer insulating paper sleeves the surfaces of the primary coil and the secondary coil. An outer copper foil is sleeved on the surface of the outer insulating paper. The inner insulating paper and the outer insulating paper are dotting paper AFA.

[0006] Preferably, two winding rings are arranged above the base, and a plurality of blocking support plates are fixed on the inner wall surface of the winding rings.

[0007] Preferably, a positioning ring is arranged above the base. The inner wall surface of the positioning ring is slidably inserted with the primary coil and the secondary coil. A covering plate is detachably arranged on the top surface of the positioning ring.

[0008] Preferably, a plurality of support rods are fixed on the top surface of the base. Threaded grooves are formed at the tops of the support rods. A plurality of fixing holes are formed on the top surface of the covering plate. A plurality of positioning holes are formed on the top surface of the positioning ring. The positioning holes are slidably inserted with the support rods. Fixing bolts are rotatably inserted into the fixing holes. The bottom ends of the fixing bolts pass through the fixing holes and are threadedly connected with the threaded grooves.

[0009] Preferably, two threaded holes are respectively formed on both sides of the base, and a limit bolt is threadedly connected inside the threaded hole.

[0010] Preferably, a washer is slidably inserted on the fixing bolt, and the washer is located on the top surface of the covering plate.

[0011] Compared with the prior art, a transformer coil insulation structure adopting the above technical scheme has the following beneficial effects:

[0012] First, since both the inner insulating paper and the outer insulating paper are made of the spot-glued paper AFA, the inner insulating paper and the outer insulating paper supported by the spot-glued paper AFA have a stronger breakdown voltage, which can reach more than 9 KV, thereby providing a higher electrical strength and increasing the safety of the transformer during use;

[0013] Second, when the positioning ring is buckled on the primary coil and the secondary coil, the support rod is inserted into the positioning hole. Then, the staff will install the covering plate on the positioning ring, and then pass the fixing bolt through the washer and the fixing hole, and then screw it into the threaded groove, which increases the firmness of the positions of the primary coil and the secondary coil;

[0014] Third, after the primary coil and the secondary coil are placed into the installation groove, the staff will screw the limit bolt into the threaded hole, so that one end of the limit bolt presses on the surfaces of the primary coil and the secondary coil, which increases the stability of the positions of the primary coil and the secondary coil in the installation groove and facilitates the subsequent installation. Description of the Drawings

[0015] Figure 1 It is a three-dimensional schematic diagram of the embodiment.

[0016] Figure 2 It is an exploded three-dimensional schematic diagram of the embodiment.

[0017] Figure 3 It is an exploded schematic diagram of the positioning ring and the covering plate in the embodiment.

[0018] Figure 4 It is an exploded schematic diagram of the winding coil and the baffle plate in the embodiment.

[0019] In the figure: 1. Base; 2. Installation groove; 3. Primary coil; 4. Secondary coil; 5. Inner copper foil; 6. Inner insulating paper; 7. Outer insulating paper; 8. Outer copper foil; 9. Winding coil; 10. Baffle plate; 11. Positioning ring; 12. Covering plate; 13. Support rod; 14. Threaded groove; 15. Fixing hole; 16. Positioning hole; 17. Fixing bolt; 18. Threaded hole; 19. Limit bolt; 20. Washer. Detailed Embodiment

[0020] The following will describe in detail the preferred embodiments of the present utility model in conjunction with the accompanying drawings.

[0021] As Figure 1 、 Figure 2 and Figure 4 shown, a transformer coil insulation structure includes a base 1. An installation groove 2 is formed on the top surface of the base 1. A primary coil 3 is detachably arranged inside the installation groove 2, and a secondary coil 4 is detachably arranged inside the installation groove 2. An inner copper foil 5 is arranged between the primary coil 3 and the secondary coil 4. Inner insulating papers 6 are respectively arranged on both sides of the inner copper foil 5. An outer insulating paper 7 is arranged above the base 1. The inner wall surface of the outer insulating paper 7 is sleeved on the surfaces of the primary coil 3 and the secondary coil 4. An outer copper foil 8 is sleeved on the surface of the outer insulating paper 7. The inner insulating paper 6 and the outer insulating paper 7 are dotting paper AFA. Two winding rings 9 are arranged above the base 1, and a plurality of blocking support plates 10 are fixed on the inner wall surface of the winding rings 9.

[0022] During use, since both the inner insulating paper 6 and the outer insulating paper 7 are made of dotting paper AFA, the inner insulating paper 6 and the outer insulating paper 7 supported by the dotting paper AFA have a stronger breakdown voltage, which can reach more than 9 KV, thereby providing a higher electrical strength and increasing the safety of the transformer during use.

[0023] As Figure 3 shown, a positioning ring 11 is arranged above the base 1. The inner wall surface of the positioning ring 11 is slidably inserted with the primary coil 3 and the secondary coil 4. A cover plate 12 is detachably arranged on the top surface of the positioning ring 11. A plurality of support rods 13 are fixed on the top surface of the base 1. A threaded groove 14 is formed at the top end of the support rod 13. A plurality of fixing holes 15 are formed on the top surface of the cover plate 12. A plurality of positioning holes 16 are formed on the top surface of the positioning ring 11. The positioning holes 16 are slidably inserted with the support rods 13. A fixing bolt 17 is rotatably inserted into the fixing hole 15. The bottom end of the fixing bolt 17 passes through the fixing hole 15 and is threadedly connected with the threaded groove 14. A washer 20 is slidably inserted on the fixing bolt 17, and the washer 20 is located on the top surface of the cover plate 12.

[0024] During use, when the positioning ring 11 is buckled on the primary coil 3 and the secondary coil 4, the support rods 13 are inserted into the positioning holes 16. Then, the staff will install the cover plate 12 on the positioning ring 11, and then pass the fixing bolt 17 through the washer 20 and the fixing hole 15, and then screw it into the threaded groove 14, which increases the firmness of the positions of the primary coil 3 and the secondary coil 4.

[0025] As Figure 2 shown, two threaded holes 18 are respectively formed on both sides of the base 1, and a limit bolt 19 is threadedly connected inside the threaded holes 18.

[0026] In use, after the primary coil 3 and the secondary coil 4 are placed inside the installation groove 2, the staff will screw the limit bolt 19 into the threaded hole 18, so that one end of the limit bolt 19 presses against the surfaces of the primary coil 3 and the secondary coil 4, increasing the stability of the positions of the primary coil 3 and the secondary coil 4 in the installation groove 2 and facilitating the subsequent installation.

[0027] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent replacements or changes, should be covered within the protection scope of the present invention.

Claims

1. A transformer coil insulation structure, comprising a base (1), characterized in that, The top surface of the base (1) is provided with an installation groove (2). A primary coil (3) is detachably arranged inside the installation groove (2), and a secondary coil (4) is detachably arranged inside the installation groove (2). An inner copper foil (5) is arranged between the primary coil (3) and the secondary coil (4). Inner insulating papers (6) are respectively arranged on both sides of the inner copper foil (5). An outer insulating paper (7) is arranged above the base (1). The inner wall surface of the outer insulating paper (7) is sleeved on the surfaces of the primary coil (3) and the secondary coil (4). An outer copper foil (8) is sleeved on the surface of the outer insulating paper (7). The inner insulating paper (6) and the outer insulating paper (7) are dotting paper AFA.

2. The insulating structure of a transformer coil according to claim 1, wherein: Two winding rings (9) are arranged above the base (1). A number of blocking support plates (10) are fixed on the inner wall surface of the winding ring (9).

3. The insulating structure of a transformer coil according to claim 1, characterized in that: A positioning ring (11) is arranged above the base (1). The inner wall surface of the positioning ring (11) is slidably inserted with the primary coil (3) and the secondary coil (4). A cover plate (12) is detachably arranged on the top surface of the positioning ring (11).

4. The insulating structure of a transformer coil according to claim 3, characterized in that: A number of support rods (13) are fixed on the top surface of the base (1). Threaded grooves (14) are opened at the tops of the support rods (13). A number of fixing holes (15) are opened on the top surface of the cover plate (12). A number of positioning holes (16) are opened on the top surface of the positioning ring (11). The positioning holes (16) are slidably inserted with the support rods (13). A fixing bolt (17) is rotatably inserted into the fixing hole (15). The bottom end of the fixing bolt (17) passes through the fixing hole (15) and is threadedly connected with the threaded groove (14).

5. A transformer coil insulation structure according to claim 1, characterized in that: Two threaded holes (18) are respectively opened on both sides of the base (1). A limit bolt (19) is threadedly connected inside the threaded hole (18).

6. A transformer coil insulation structure according to claim 4, characterized in that: A washer (20) is slidably inserted on the fixing bolt (17). The washer (20) is located on the top surface of the cover plate (12).

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