Auxiliary partition and fixing structure for a transformer

Abstract

The utility model discloses a kind of auxiliary partition and fixing structure for transformer, it is related to transformer technical field.The utility model includes transformer body, the transformer body top is provided with phase interval board subassembly, the phase interval board subassembly includes insulating plate and insulating support frame, the phase interval board subassembly one side is provided with clamp piece, the clamp piece quantity is two, and side beam subassembly is provided between two the clamp piece.The utility model improves insulating partition effect by adopting diphenyl ether plate to replace traditional epoxy resin, reduces phase-to-phase insulation distance, saves space, is conducive to the miniaturization development of transformer, while enhancing impact resistance, prolongs the service life of transformer, the " mouth " frame of side beam subassembly and clamp piece bolt lock, constitute closed loop stress system, disperse horizontal vibration stress, restrain clamp piece end deformation, guarantee stress uniform, increase the load bearing of coil, improve transformer overall stability and reliability.

Description

Technical Field

[0001] This utility model belongs to the field of transformer technology, and in particular relates to an auxiliary separation and fixing structure for transformers. Background Technology

[0002] As the core equipment for power transmission and distribution in a power system, the operational stability of transformers directly affects the reliability of the power grid. With the upgrading of power system capacity and the increasing demand for new energy grid connection, the voltage level and power density of transformers continue to increase, and the electromagnetic forces, mechanical vibrations, and thermal stresses between the internal windings place higher demands on structural design.

[0003] Traditional auxiliary separation and fixing structures often use a combination of ordinary insulating boards and simple metal frames, which have the following drawbacks: First, insufficient insulation performance: traditional insulating materials have low high-temperature resistance and electrical strength, and are prone to insulation aging due to partial discharge of windings or high-temperature environments during long-term operation, leading to the risk of short circuits in the windings; Second, weak structural rigidity: the separator insulating board and the support frame are mostly connected separately, and gaps are easily generated at the joint surface. Under the action of transportation vibration or electromagnetic force during operation, they are prone to loosening, resulting in a reduction in the distance between windings and exacerbating electromagnetic interference; Third, the structural design of the clamps is not reasonable enough, and severe deformation at both ends is likely to occur. It cannot ensure that the clamps are evenly stressed, nor can it effectively increase the load-bearing capacity of the coils, affecting the overall stability and reliability of the transformer.

[0004] To address these issues, we provide an auxiliary separation and fixing structure for transformers. Utility Model Content

[0005] The purpose of this utility model is to provide an auxiliary separation and fixing structure for transformers. By cooperating with the phase partition assembly and the side beam assembly, it solves the problems of poor insulation and insufficient strength of the fixing structure in the existing auxiliary separation and fixing structures for transformers.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0007] This utility model is an auxiliary separation and fixing structure for a transformer, including a transformer body, a phase spacer assembly on the top of the transformer body, a clamp on one side of the phase spacer assembly, two clamps, and a side beam assembly between the two clamps.

[0008] The present invention is further configured such that the phase spacer assembly includes an insulating plate and an insulating support frame, wherein there are two insulating plates and an insulating support frame is provided between the two insulating plates, and the two insulating plates are fixedly connected by the insulating support frame. The insulating support frame extends perpendicular to the length direction of the insulating plate to avoid electromagnetic interference and mechanical collision between adjacent windings. The diphenyl ether plate has excellent high temperature resistance, electrical insulation and mechanical strength, and can effectively isolate corona discharge between windings and withstand mechanical stress generated by winding vibration.

[0009] The present invention is further configured such that the insulating plate is a diphenyl ether plate, the insulating support frame is integrally formed with the insulating plate, the insulating support frame has a hollow structure design, the cross-sectional shape of the insulating support frame is trapezoidal, the number of insulating plates is two and they are arranged in parallel, the two insulating plates are fixedly connected by the insulating support frame, the insulating support frame extends perpendicular to the length direction of the insulating plate to avoid electromagnetic interference and mechanical collision between adjacent windings, the diphenyl ether plate has excellent high temperature resistance, electrical insulation and mechanical strength, and can effectively isolate corona discharge between windings and withstand mechanical stress generated by winding vibration.

[0010] The present invention is further configured such that the surface of the insulating plate is provided with four first through holes in a rectangular arrangement, which are used to pass through bolts or tie rods to fix the phase spacer assembly to the transformer body positioning block on the top of the transformer body, thereby ensuring that the phase spacer assembly is accurately positioned and reliably fixed.

[0011] The present invention is further configured such that the side beam assembly includes two supporting steel plates and two end steel plates, and the inner sides of the two end steel plates are respectively fixedly connected to the two sides of the two supporting steel plates. The two supporting steel plates are arranged in parallel, and the two end steel plates are respectively perpendicularly connected to the two ends of the two supporting steel plates to form a "U"-shaped frame structure. The inner sides of the two end steel plates are respectively welded and fixed to the two sides of the two supporting steel plates. The side beam assembly is fixedly connected to the clamps through the end steel plates to form a transverse support structure, which enhances the overall rigidity of the top of the transformer body, prevents severe deformation at both ends of the clamps, ensures uniform force on the clamps, and increases the load-bearing capacity of the coils.

[0012] The present invention is further configured such that the surface of the supporting steel plate is provided with two second through holes, and the supporting steel plate is provided with a third through hole between the two second through holes. The second through holes are symmetrically distributed in the middle of the supporting steel plate and are used to pass through transverse tie rods to connect adjacent transformer bodies or fix them to the side wall of the transformer tank. The third through hole is located between the two second through holes and is used to pass through grounding bolts to ensure reliable grounding of the side beam assembly and avoid accumulation of induced potential.

[0013] The present invention is further configured such that a fourth through hole is provided on the surface of the end steel plate, and the number of the four fourth through holes is four. The four fourth through holes are distributed in a rectangular shape and cooperate with the corresponding through holes on the clamp. The side beam assembly is locked to the clamp by high-strength bolts, thereby transmitting lateral constraint force and restricting the lateral displacement of the top of the transformer body.

[0014] The present invention has the following beneficial effects.

[0015] 1. This utility model improves the insulation effect, reduces the interphase insulation distance, and saves space by using diphenyl ether board instead of traditional epoxy resin, which is conducive to the miniaturization of transformers. At the same time, it enhances the impact resistance and extends the service life of transformers. The "U"-shaped frame of the side beam assembly is locked with the clamp bolts to form a closed-loop force system, which disperses the lateral vibration stress, suppresses the deformation of the clamp ends, ensures uniform force, increases the load-bearing capacity of the coil, and improves the overall stability and reliability of the transformer.

[0016] 2. This utility model, through the trapezoidal cross-section insulation support frame and hollow structure design, increases the creepage distance between windings while ensuring insulation performance, suppresses corona discharge, and extends insulation life. The insulation board and insulation support frame are integrally formed, eliminating gaps at the joint surface and improving overall rigidity.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a three-dimensional diagram of an auxiliary separation and fixing structure for a transformer.

[0020] Figure 2 This is a perspective view of a side beam assembly in an auxiliary separation and fixing structure for a transformer.

[0021] Figure 3 This is a perspective view of a phase spacer assembly in an auxiliary separation and fixing structure for a transformer.

[0022] Figure 4 This is a cross-sectional view of an insulating plate in an auxiliary separation and fixing structure used in a transformer.

[0023] In the attached diagram: 1. Transformer body; 2. Phase spacer assembly; 201. Insulation plate; 202. Insulation support frame; 3. Clamping piece; 4. Side beam assembly; 401. Supporting steel plate; 402. End steel plate; 5. First through hole; 6. Second through hole; 7. Third through hole; 8. Fourth through hole. Detailed Implementation

[0024] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments. Example

[0025] Please see Figures 1-4 This utility model is an auxiliary separation and fixing structure for a transformer, including a transformer body 1. A phase partition plate assembly 2 is provided on the top of the transformer body 1. A clamp 3 is provided on one side of the phase partition plate assembly 2. There are two clamps 3, and a side beam assembly 4 is provided between the two clamps 3. The phase partition plate assembly 2 includes an insulating plate 201 and an insulating support frame 202. There are two insulating plates 201, and the insulating support frame 202 is provided between the two insulating plates 201. The insulating plate 201 is a diphenyl ether plate. The insulating support frame 202 is integrally formed with the insulating plate 201. The insulating support frame 202 has a hollow structure design and a trapezoidal cross-section. The surface of the insulating plate 201 has four first through holes 5.

[0026] Further details: Two clamping members 3 are symmetrically distributed on both sides of the transformer body 1. A side beam assembly 4 is fixedly connected between the two clamping members 3. The side beam assembly 4 spans across the top of the transformer body 1, forming a rigid frame for winding separation and fixation together with the phase spacer assembly 2. Two insulating plates 201 are arranged in parallel, and are fixedly connected by an insulating support frame 202. The insulating support frame 202 extends perpendicular to the length of the insulating plates 201 to avoid electromagnetic interference and mechanical collisions between adjacent windings. The diphenyl ether plate has excellent high-temperature resistance and electrical insulation. The insulation support frame 202 and the insulation plate 201 are integrally formed and manufactured by molding process to ensure that there is no gap between the two joint surfaces, thereby improving the overall structural rigidity. The trapezoidal structure can increase the contact area with the top oil tank of the transformer body 1, disperse the support stress, and avoid local crushing. The first through hole 5 is rectangularly distributed and is used to pass through bolts or tie rods to fix the phase spacer assembly 2 to the transformer body positioning block on the top of the transformer body 1, ensuring that the phase spacer assembly 2 is accurately positioned and reliably fixed. Example

[0027] Please see Figures 1-4Based on Embodiment 1, the side beam assembly 4 includes a supporting steel plate 401 and an end steel plate 402. There are two end steel plates 402 and two supporting steel plates 401. The inner sides of the two end steel plates 402 are fixedly connected to the two sides of the two supporting steel plates 401, respectively. The surface of the supporting steel plate 401 is provided with two second through holes 6. The supporting steel plate 401 is provided with a third through hole 7 between the two second through holes 6. The surface of the end steel plate 402 is provided with four fourth through holes 8.

[0028] Further details: There are two supporting steel plates 401 arranged in parallel, and two end steel plates 402 are respectively vertically connected to the two ends of the two supporting steel plates 401 to form a "U"-shaped frame structure; the inner sides of the two end steel plates 402 are welded and fixed to the two sides of the two supporting steel plates 401 respectively. The side beam assembly 4 is fixedly connected to the clamp 3 through the end steel plates 402 to form a transverse support structure, which enhances the overall rigidity of the top of the transformer body 1, prevents severe deformation at both ends of the clamp 3, ensures uniform force on the clamp 3, and increases the load-bearing capacity of the coil. The second through holes 6 are symmetrically distributed in the middle of the supporting steel plates 401 and are used to pass through transverse tie rods to connect adjacent transformer bodies 1 or fix them to the side wall of the transformer tank. The third through hole 7 is located between the two second through holes 6 and is used to pass through grounding bolts to ensure reliable grounding of the side beam assembly 4 and avoid accumulation of induced potential. The four fourth through holes 8 are rectangularly distributed and cooperate with the corresponding through holes on the clamp 3. The side beam assembly 4 and the clamp 3 are locked together by high-strength bolts to transmit transverse constraint force and limit the transverse displacement of the top of the transformer body 1.

[0029] The working principle of this utility model is as follows: the insulating plate 201 of the phase spacer assembly 2 directly covers the winding. Through the physical isolation of the trapezoidal insulating support frame 202, the windings are prevented from approaching or colliding with each other due to electromagnetic force. The high insulation of the diphenyl ether insulating plate 201 can withstand the partial discharge between the windings and prevent insulation breakdown.

[0030] Rigid fixing stage: Clamp 3 is welded to the side wall of the transformer tank through L-shaped channel steel to provide stable vertical clamping force. The "U"-shaped frame of the side beam assembly 4 is locked to clamp 3 through M bolts to transfer the lateral stress to the top of the transformer body 1 and limit the lateral displacement of the winding. The phase spacer assembly 2 is locked to the positioning block through the first through hole 5 to provide vertical support force, prevent severe deformation at both ends of clamp 3, ensure uniform force on clamp 3, and increase the load-bearing capacity of the coil.

[0031] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An auxiliary separation and fixing structure for a transformer, comprising a transformer body (1), characterized in that: The transformer body (1) is provided with a phase spacer assembly (2) on the top, and a clamp (3) is provided on one side of the phase spacer assembly (2). There are two clamps (3), and a side beam assembly (4) is provided between the two clamps (3).

2. The auxiliary separation and fixing structure for a transformer according to claim 1, characterized in that: The phase spacer assembly (2) includes an insulating plate (201) and an insulating support frame (202). There are two insulating plates (201), and an insulating support frame (202) is provided between the two insulating plates (201).

3. The auxiliary separation and fixing structure for a transformer according to claim 2, characterized in that: The insulating board (201) is a diphenyl ether board, and the insulating support frame (202) is integrally formed with the insulating board (201). The insulating support frame (202) has a hollow structure design, and the cross-section of the insulating support frame (202) is trapezoidal.

4. The auxiliary separation and fixing structure for a transformer according to claim 2, characterized in that: The insulating board (201) has four first through holes (5) on its surface.

5. The auxiliary separation and fixing structure for a transformer according to claim 1, characterized in that: The side beam assembly (4) includes a support steel plate (401) and an end steel plate (402). There are two end steel plates (402) and two support steel plates (401), and the inner sides of the two end steel plates (402) are fixedly connected to the two sides of the two support steel plates (401).

6. The auxiliary separation and fixing structure for a transformer according to claim 5, characterized in that: The surface of the supporting steel plate (401) is provided with a second through hole (6), and there are two second through holes (6). The supporting steel plate (401) is provided with a third through hole (7) between the two second through holes (6).

7. The auxiliary separation and fixing structure for a transformer according to claim 5, characterized in that: The end steel plate (402) has a fourth through hole (8) on its surface, and the number of the fourth through holes (8) is four.

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