Lead fixing structure for transformer

Abstract

The utility model discloses a lead fixing structure for transformer belongs to transformer field including transformer bushing, the outer arc surface of transformer bushing is equipped with fastening sleeve ring, the outer arc surface of fastening sleeve ring is equipped with convex end, the inner arc surface bottom of convex end is equipped with outer sleeve spare, the outer arc surface of fastening sleeve ring is through convex end and is in abutment in the inner arc surface of outer sleeve spare, the outer arc surface one side of outer sleeve spare is fixedly installed with annular boss, the inner arc surface of annular boss is equipped with ladder end, through deformation sleeve and sealing rubber ring, can effectively insulate outside moisture, dust and other impurities, avoid causing the erosion to lead, and from multiple dimensions guaranteeed the reliability, the leakproofness and stability of lead fixed, all -round satisfaction transformer under complex working condition's operation demand, reduce the risk of failure greatly because of improper lead fixation, avoid the traditional binding material and easily appear aging, the problem of fragile phenomenon, and fixedly press from both sides also can wear and tear because of frequent friction.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, specifically a lead fixing structure for transformers. Background Technology

[0002] Transformers generate electromagnetic forces during operation and are also susceptible to external environmental vibrations. If the leads are not reliably secured, these forces and vibrations can cause displacement, swaying, or even breakage, leading to electrical faults, affecting the normal operation of the transformer, and potentially causing power outages that severely impact production and daily life.

[0003] The accuracy of the lead wire position is also crucial to ensuring a uniform electric field distribution inside the transformer. An inappropriate lead wire position may lead to excessively high local electric field strength, which can accelerate insulation aging and reduce the insulation performance and service life of the transformer.

[0004] Traditional lead wire fixing methods typically employ simple binding techniques or rely on ordinary fixing clips. However, during the long-term operation of transformers, due to the combined effects of continuous electromagnetic forces, mechanical vibrations, and environmental factors, binding materials are prone to aging and embrittlement, and fixing clips also wear down due to frequent friction. As a result, the originally sturdy fixing structure gradually loosens, significantly reducing the reliability of lead wire fixing.

[0005] Therefore, this utility model provides a lead fixing structure for transformers to solve the above problems. Utility Model Content

[0006] (a) Technical problems to be solved This invention provides a lead fixing structure for transformers, aiming to solve the problems mentioned in the background art.

[0007] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: A transformer bushing is included, wherein a fastening ring is provided on the outer arc surface of the transformer bushing, a protruding end is provided on the outer arc surface of the fastening ring, an outer sleeve is provided at the bottom of the inner arc surface of the protruding end, the outer arc surface of the fastening ring abuts against the inner arc surface of the outer sleeve through the protruding end, an annular boss is fixedly installed on one side of the outer arc surface of the outer sleeve, a stepped end is provided on the inner arc surface of the annular boss, threaded teeth are provided on the side of the annular boss near the stepped end, the inner arc surface of the annular boss has an oblique structure, a hook shape is provided on the side of the annular boss away from the outer sleeve, and a deformable sleeve is threadedly connected to the threaded teeth on the inner arc surface of the annular boss.

[0008] As a preferred technical solution of this application, the outer arc surface of the deformable sleeve is provided with a thread and is connected to the thread teeth of the inner arc surface of the annular boss. The outer arc surface of the deformable sleeve is provided with an outer protrusion near the thread, and the lower surface of the outer protrusion abuts against the hook-shaped surface.

[0009] As a preferred technical solution of this application, the inner arc surface of the deformable sleeve is connected to the lead wire body, and the outer arc surface of the annular boss is fixedly sleeved with a sealing rubber ring, one side of the sealing rubber ring abutting against the surface of the outer sleeve.

[0010] As a preferred technical solution of this application, a clamping sleeve is movably engaged at the top of the hook-shaped outer arc surface, and a pressing end is provided at the top of the inner arc surface of the clamping sleeve, with one end of the pressing end abutting against the outer arc surface of the deformable sleeve.

[0011] As a preferred technical solution of this application, the outer arc surface edge of the compression sleeve is provided with a folded edge, and the inner sidewall of the folded edge is movably engaged with a hook-shaped part.

[0012] As a preferred technical solution of this application, the inner arc surface of the compression sleeve and the sealing rubber ring are in the same plane, the lead wire body is bent in the inner arc surface of the fastening sleeve, and one end of the lead wire body is connected to the lead wire body.

[0013] (III) Beneficial Effects The deformation sleeve and sealing rubber ring effectively isolate external moisture, dust and other impurities, preventing corrosion of the leads. It also ensures the reliability, sealing and stability of the lead fixing from multiple dimensions, fully meeting the operating requirements of transformers under complex working conditions. It significantly reduces the risk of failure caused by improper lead fixing, and avoids the problems of aging and embrittlement of traditional binding materials and wear of fixing clips due to frequent friction. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a transformer sleeve used for fixing the lead wires of a transformer. Figure 2 This is a schematic diagram of the internal cross-section of an annular boss in a lead fixing structure for a transformer. Figure 3 This is a schematic diagram of the internal structure of a deformation sleeve used for fixing the leads of a transformer. Figure 4 This is a schematic diagram of the disassembled structure of an annular boss and a deformation sleeve used for fixing the leads of a transformer.

[0015] In the picture: 1. Transformer bushing; 2. Fastening ring; 201. Protruding end; 3. Outer sleeve; 4. Annular boss; 401. Stepped end; 402. Threaded tooth; 403. Hook-shaped; 5. Deformation sleeve; 501. Outer protrusion; 6. Lead body; 7. Sealing rubber ring; 8. Compression sleeve; 801. Lower compression end; 802. Folded edge. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] This utility model provides a lead fixing structure for transformers, such as... Figures 1 to 4 As shown, the device includes a transformer bushing 1. The outer arc surface of the transformer bushing 1 is provided with a fastening ring 2. The outer arc surface of the fastening ring 2 is provided with a protruding end 201. An outer sleeve 3 is provided at the bottom of the inner arc surface of the protruding end 201. The outer arc surface of the fastening ring 2 abuts against the inner arc surface of the outer sleeve 3 through the protruding end 201. An annular boss 4 is fixedly installed on one side of the outer arc surface of the outer sleeve 3. The inner arc surface of the annular boss 4 is provided with a stepped end 401. A threaded tooth 402 is provided on the side of the annular boss 4 near the stepped end 401. The inner arc surface of the annular boss 4 has an oblique structure. The annular boss 4 is located away from... One side of the outer sleeve 3 is provided with a hook-shaped 403. The inner arc surface of the annular boss 4 is threaded with a deformable sleeve 5. The outer arc surface of the deformable sleeve 5 is threaded and connected to the threaded teeth 402 of the inner arc surface of the annular boss 4. The outer arc surface of the deformable sleeve 5 is provided with an outer protrusion 501 near the thread. The lower surface of the outer protrusion 501 abuts against the surface of the hook-shaped 403. The inner arc surface of the deformable sleeve 5 is connected through the lead wire body 6. The outer arc surface of the annular boss 4 is fixedly sleeved with a sealing rubber ring 7. One side of the sealing rubber ring 7 abuts against the surface of the outer sleeve 3.

[0018] The transformer leads are mostly composed of transformer bushings 1. To achieve a more stable fixing effect, a fastening collar 2 is fitted onto the outer arc surface of the transformer bushing 1. Considering that the transformer bushing 1 is composed of sections spliced ​​together, and that the fastening collar 2 has elastic structural characteristics, it can be snapped between two adjacent nodes of the transformer bushing 1. Utilizing the elastic deformation of the fastening collar 2, it can adapt to the gaps between bushing nodes of different sizes during installation, ensuring a tight fit. To further improve the connection stability of the fastening collar 2, an outer sleeve 3 is continuously fitted around it. The outer arc surface of the fastening collar 2 has a protruding end 201. The protruding end 201 fits against the bottom surface of the outer sleeve 3. When pressure is applied to the fastening ring 2 to compress it, the reaction force generated by the fastening ring 2 on the outer sleeve 3 increases with the degree of compression, which in turn causes the outer sleeve 3 to shrink more significantly. This shrinkage effect further enhances the clamping force of the entire fixing structure on the transformer bushing 1, effectively resisting external force interference such as vibration and displacement caused by transformer operation, ensuring that the lead wire always maintains a stable position in the transformer bushing 1, greatly improving the reliability and safety of lead wire fixing, and providing a solid guarantee for the long-term stable operation of the transformer.

[0019] A clamping sleeve 8 is movably engaged at the top of the outer arc surface of the hook-shaped 403. The top of the inner arc surface of the clamping sleeve 8 is provided with a pressing end 801. One end of the pressing end 801 abuts against the outer arc surface of the deformable sleeve 5. A folded edge 802 is provided at the edge of the outer arc surface of the clamping sleeve 8. The inner sidewall of the folded edge 802 is movably engaged with the hook-shaped 403. The inner arc surface of the clamping sleeve 8 is in the same plane as the sealing rubber ring 7. The lead wire body 6 is bent in the inner arc surface of the fastening ring 2. One end of the lead wire body 6 is connected to the lead wire body 6.

[0020] Meanwhile, an annular boss 4 is securely installed on one side of the outer arc surface of the outer casing 3. Because the annular boss 4 is located in the middle of the outer casing 3, the lead wire from the transformer bushing 1 will wrap around from the top downwards into a U-shaped structure and pass through the internal space of the annular boss 4. To further improve the lead wire fixing effect, a deformation sleeve 5 is installed on the inner arc surface of the annular boss 4 using a threaded connection. The external thread of the deformation sleeve 5 meshes with the thread teeth 402 inside the annular boss 4. When the deformation sleeve 5 is rotated, it can move smoothly towards the outer casing 3 along the thread direction. It is worth mentioning that the interior of the annular boss 4 has a conical structure. As the deformation sleeve 5 continues to penetrate deeper, under the action of the conical structure, the deformation sleeve 5 will gradually contract, thus precisely and forcefully clamping the lead wire body 6 at the tail end to ensure the lead wire... The sealing of the main body 6 is achieved by tightly fitting a sealing rubber ring 7 onto the outer arc surface of the annular boss 4. The sealing rubber ring 7 effectively isolates external moisture, dust, and other impurities, preventing corrosion of the lead wire. In addition, a clamping sleeve 8 is connected to the top of the annular boss 4. The downward pressing end 801 at the top of the clamping sleeve 8 precisely abuts against the front end of the deformation sleeve 5. When the clamping sleeve 8 is tightened, the downward pressing end 801 continuously applies downward pressure, further enhancing the clamping force of the deformation sleeve 5 on the lead wire main body 6. At the same time, it can also stabilize the position of the deformation sleeve 5, preventing it from loosening due to vibration and other factors during transformer operation. Through the clamping effect at both ends, the reliability, sealing, and stability of the lead wire fixation are ensured from multiple dimensions, comprehensively meeting the operating requirements of the transformer under complex working conditions and significantly reducing the risk of failure caused by improper lead wire fixation.

[0021] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A lead fixing structure for a transformer, comprising a transformer bushing (1), characterized in that: The outer arc surface of the transformer bushing (1) is provided with a fastening ring (2), the outer arc surface of the fastening ring (2) is provided with a protruding end (201), the bottom of the inner arc surface of the protruding end (201) is provided with an outer sleeve (3), the outer arc surface of the fastening ring (2) abuts against the inner arc surface of the outer sleeve (3) through the protruding end (201), an annular boss (4) is fixedly installed on one side of the outer arc surface of the outer sleeve (3), the inner arc surface of the annular boss (4) is provided with a stepped end (401), the side of the annular boss (4) near the stepped end (401) is provided with a threaded tooth (402), the inner arc surface of the annular boss (4) is an inclined structure, the side of the annular boss (4) away from the outer sleeve (3) is provided with a hook shape (403), and a deformable sleeve (5) is threadedly connected at the threaded tooth (402) of the inner arc surface of the annular boss (4).

2. The lead fixing structure for a transformer according to claim 1, characterized in that: The outer arc surface of the deformable sleeve (5) is provided with a thread and is connected to the thread teeth (402) of the inner arc surface of the annular boss (4). The outer arc surface of the deformable sleeve (5) is provided with an outer protrusion (501) near the thread, and the lower surface of the outer protrusion (501) abuts against the surface of the hook (403).

3. The lead fixing structure for a transformer according to claim 2, characterized in that: The inner arc surface of the deformable sleeve (5) is connected to the lead wire body (6), and the outer arc surface of the annular boss (4) is fixedly fitted with a sealing rubber ring (7), and one side of the sealing rubber ring (7) abuts against the surface of the outer sleeve (3).

4. The lead fixing structure for a transformer according to claim 3, characterized in that: The top of the outer arc surface of the hook-shaped (403) is movably engaged with a clamping sleeve (8), and the top of the inner arc surface of the clamping sleeve (8) is provided with a pressing end (801), one end of the pressing end (801) abutting against the outer arc surface of the deformable sleeve (5).

5. The lead fixing structure for a transformer according to claim 4, characterized in that: The outer arc edge of the compression sleeve (8) is provided with a folded edge (802), and the inner sidewall of the folded edge (802) is movably engaged with the hook (403).

6. The lead fixing structure for a transformer according to claim 5, characterized in that: The inner arc surface of the compression sleeve (8) is in the same plane as the sealing rubber ring (7), the lead wire body (6) is bent in the inner arc surface of the fastening ring (2), and one end of the lead wire body (6) is connected to the lead wire body (6).

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