Anti-short-circuit structure of transformer large circle

Abstract

The utility model relates to the field of transformers, and discloses an anti-short circuit structure of a large circle of a transformer, which comprises a high-voltage coil, a low-voltage coil is arranged in the high-voltage coil, an iron core body is arranged in the low-voltage coil, and a plurality of filling iron cores are arranged in the low-voltage coil. The filling iron cores are located on the left side and the right side of the iron core body respectively, and a plurality of corrugated boards are arranged on the front side and the rear side of the inner wall of the high-voltage coil respectively. According to the utility model, the corrugated board is used for replacing a stay mechanism, and the corrugated board is high in structural strength and not easy to deform and damage, so that the short circuit resistance of the large circle part of the transformer can be improved, the stability and the safety of the transformer are effectively improved, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, and particularly relates to an anti-short-circuit structure for the large circle of a transformer. Background Technique

[0002] As one of the main power transmission and transformation equipment in a substation, a transformer has a core position in the substation. It can be said that a transformer is the heart of a substation. The operating state of the transformer directly affects the entire substation. Among them, most large power transformers are oil-immersed transformers. The characteristic of an oil-immersed transformer is that insulating oil is used as the heat dissipation and insulation medium for the transformer windings and iron cores.

[0003] According to the Chinese patent with the publication number: CN218182031U, an oil-immersed power transformer support strip curtain includes a dotting paper. A plurality of evenly distributed support strips are connected to the dotting paper. An oil flow channel for transformer oil to flow is formed between an adjacent pair of support strips and the dotting paper. The oil flow channel extends along the axial direction of the support strip. The thickness of the dotting paper is 0.08 mm. The dotting paper is thermally pressed and bonded to the support strip. The length of the dotting paper is 30 mm. A transformer includes a high-voltage coil, a low-voltage coil, and an oil-immersed power transformer support strip curtain. The oil-immersed power transformer support strip curtain includes a dotting paper. A plurality of evenly distributed support strips are connected to the dotting paper. An oil flow channel for transformer oil to flow is formed between an adjacent pair of support strips and the dotting paper. The oil flow channel extends along the axial direction of the support strip.

[0004] In the above solution, an oil flow channel for transformer oil to flow is formed between an adjacent pair of support strips and the dotting paper, resulting in the following disadvantages: The transformer uses support strips, but the support strip structure has low strength and is prone to deformation, thereby reducing the short-circuit resistance of the large circle part of the transformer and leading to a decrease in the stability and safety of the transformer. Content of the Utility Model

[0005] The purpose of the utility model is to provide an anti-short-circuit structure for the large circle of a transformer to solve the problem that the transformer uses support strips, but the support strip structure has low strength and is prone to deformation, thereby reducing the short-circuit resistance of the large circle part of the transformer and leading to a decrease in the stability and safety of the transformer.

[0006] To achieve the above utility model purpose, the utility model adopts the following technical scheme: An anti-short-circuit structure for the large circle of a transformer includes a high-voltage coil. A low-voltage coil is arranged inside the high-voltage coil. An iron core body is arranged inside the low-voltage coil. A plurality of filling iron cores are arranged inside the low-voltage coil. The plurality of filling iron cores are respectively located on the left side and the right side of the iron core body. A plurality of corrugated papers are respectively arranged on the front side and the rear side of the inner wall of the high-voltage coil.

[0007] Preferably, a lower clamping member is provided on the bottom surface of the iron core body, and an upper clamping member is provided on the top surface of the iron core body. The lower clamping member and the upper clamping member are used to fix the iron core body.

[0008] Preferably, insulating pads are respectively provided on the top surface of the lower clamping member and the bottom surface of the upper clamping member.

[0009] Preferably, a plurality of first threaded holes are formed in the top surface of the lower clamping member, and a plurality of second threaded holes are formed in the top surface of the upper clamping member. Screws are respectively threadedly connected between the plurality of first threaded holes and the plurality of second threaded holes, and nuts are respectively threadedly connected to the threaded ends of the plurality of screws.

[0010] Preferably, two washers are provided on each of the plurality of screws.

[0011] Preferably, the thickness of the washer is 0.2 mm.

[0012] Compared with the prior art, a short-circuit resistance structure of a large circle of a transformer adopting the above technical scheme has the following beneficial effects:

[0013] First, in use, by replacing the support bar mechanism with corrugated cardboard, the corrugated cardboard has high structural strength, is not easily deformed or damaged, can increase the short-circuit resistance of the large circle part of the transformer, effectively improves the stability and safety of the transformer, and extends the service life of the equipment;

[0014] Second, in use, the lower clamping member and the upper clamping member are beneficial to fixing the iron core body, ensuring the stability of the iron core body during operation, avoiding displacement caused by vibration or external force, thereby improving the overall performance and reliability of the transformer. The insulating pads are beneficial to preventing the high-voltage coil from directly contacting the lower clamping member and the upper clamping member, effectively preventing short-circuit or discharge phenomena that may be caused by direct contact, improving the insulation performance of the equipment, and ensuring the safe operation of the transformer;

[0015] Third, in use, the screws and nuts are beneficial to fixing between the lower clamping member and the upper clamping member, realizing a tight connection between the clamping members. This fastening method is not only simple and easy to implement, but also firmly connected and can withstand various stresses during the operation of the transformer. The washers not only play a role in increasing the contact area and dispersing pressure, but also prevent the nuts from damaging the surface of the screws or the lower clamping member and the upper clamping member due to friction during tightening. By setting the thickness of the washer to 0.2 mm, it not only ensures sufficient elasticity to disperse pressure, but also avoids problems such as connection looseness caused by excessive thickness or loss of protection effect caused by too thin thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the embodiment.

[0017] Figure 2Explosion schematic diagram of the embodiment.

[0018] Figure 3 Explosion schematic diagram of the lower clamping piece and the upper clamping piece in the embodiment.

[0019] Figure 4 For the embodiment of Figure 2 Enlarged schematic diagram at position A.

[0020] In the figure: 1. High-voltage coil; 2. Low-voltage coil; 3. Iron core body; 4. Filling iron core; 5. Corrugated cardboard; 6. Lower clamping piece; 7. Upper clamping piece; 8. Insulating pad; 9. First threaded hole; 10. Second threaded hole; 11. Screw; 12. Nut; 13. Washer. Specific implementation manner

[0021] The following will, with reference to the accompanying drawings, give a detailed description of the preferred embodiments of the present utility model.

[0022] As Figure 1 , Figure 2 and Figure 4 shown, an anti-short-circuit structure for a large circle of a transformer includes a high-voltage coil 1. Inside the high-voltage coil 1, there is a low-voltage coil 2. Inside the low-voltage coil 2, there is an iron core body 3. Inside the low-voltage coil 2, there are a number of filling iron cores 4. The number of filling iron cores 4 are respectively located on the left side and the right side of the iron core body 3. On the front side and the rear side of the inner wall of the high-voltage coil 1, there are a number of corrugated cardboard 5.

[0023] During use, the front side and the rear side of the high-voltage coil 1 are respectively referred to as the large circle part of the transformer, while the left side and the right side are respectively the small circle parts of the transformer. A main oil duct is formed between the high-voltage coil 1 and the low-voltage coil 2. At this time, by replacing the support bar mechanism with the corrugated cardboard 5, the corrugated cardboard 5 has high structural strength, is not easily deformed and damaged, can increase the anti-short-circuit ability of the large circle part of the transformer, effectively improves the stability and safety of the transformer, and prolongs the service life of the equipment.

[0024] As Figures 1 - 4 shown, a lower clamping piece 6 is provided on the bottom surface of the iron core body 3, and an upper clamping piece 7 is provided on the top surface of the iron core body 3. The lower clamping piece 6 and the upper clamping piece 7 are used to fix the iron core body 3.

[0025] During use, the iron core body 3 can be fixed by the lower clamping piece 6 and the upper clamping piece 7, ensuring the stability of the iron core body 3 during operation, avoiding displacement caused by vibration or external force, and thus improving the overall performance and reliability of the transformer.

[0026] As Figures 1 - 4As shown in the figure, insulating pads 8 are respectively provided on the top surface of the lower clamping part 6 and the bottom surface of the upper clamping part 7. A number of first threaded holes 9 are formed on the top surface of the lower clamping part 6, and a number of second threaded holes 10 are formed on the top surface of the upper clamping part 7. Screws 11 are respectively threadedly connected between the number of first threaded holes 9 and the number of second threaded holes 10, and nuts 12 are respectively threadedly connected to the threaded ends of the number of screws 11.

[0027] In use, the insulating pad 8 helps to avoid direct contact between the high-voltage coil 1 and the lower clamping part 6 and the upper clamping part 7, effectively preventing short circuits or discharge phenomena that may be caused by direct contact, improving the insulation performance of the equipment, and ensuring the safe operation of the transformer. The screws 11 and nuts 12 help to fix the lower clamping part 6 and the upper clamping part 7, realizing a tight connection between the clamping parts. This fastening method is not only simple and easy to implement, but also firmly connected and can withstand various stresses during the operation of the transformer.

[0028] As Figure 3 and Figure 4 shown, two washers 13 are provided on each of the number of screws 11, and the thickness of the washer 13 is 0.2 mm.

[0029] In use, the washer 13 not only plays a role in increasing the contact area and dispersing pressure, but also prevents the nut 12 from damaging the surface of the screw 11 or the lower clamping part 6 and the upper clamping part 7 due to friction during the tightening process. By setting the thickness of the washer 13 to 0.2 mm, it not only ensures sufficient elasticity to disperse pressure, but also avoids problems such as loose connection caused by excessive thickness or loss of protection effect caused by too thin thickness.

[0030] 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 the inventive concept of the present invention, makes equivalent replacements or changes, and should be covered within the protection scope of the present invention.

Claims

1. A transformer large circle anti-short circuit structure, comprising a high voltage coil (1), characterized in that: A low-voltage coil (2) is arranged inside the high-voltage coil (1), an iron core body (3) is arranged inside the low-voltage coil (2), a plurality of filling iron cores (4) are arranged inside the low-voltage coil (2), and the plurality of filling iron cores (4) are respectively located on the left and right sides of the iron core body (3), and a plurality of corrugated cardboards (5) are respectively arranged on the front and rear sides of the inner wall of the high-voltage coil (1).

2. The short-circuit-proof structure of a transformer according to claim 1, characterized in that: The bottom surface of the iron core body (3) is provided with a lower clamp (6), and the top surface of the iron core body (3) is provided with an upper clamp (7), and the lower clamp (6) and the upper clamp (7) are used to fix the iron core body (3).

3. The short-circuit-proof structure of a transformer according to claim 2, characterized in that: The top surface of the lower clamp (6) and the bottom surface of the upper clamp (7) are respectively provided with insulating pads (8).

4. The short-circuit-proof structure of a transformer according to claim 2, characterized in that: The top surface of the lower clamp (6) is provided with a plurality of first threaded holes (9), the top surface of the upper clamp (7) is provided with a plurality of second threaded holes (10), a plurality of the first threaded holes (9) and a plurality of the second threaded holes (10) are respectively threadedly connected with screw rods (11), and a plurality of the threaded ends of the screw rods (11) are respectively threadedly connected with nuts (12).

5. The short-circuit-proof structure of a transformer according to claim 4, characterized in that: Two washers (13) are provided on each of the plurality of screw rods (11).

6. The short-circuit-proof structure of a transformer according to claim 5, characterized in that: The thickness of the gasket (13) is 0.2 mm.

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