Large transformer iron core binding structure

Abstract

The utility model belongs to the technical field of transformer assemblies, and particularly discloses a large transformer iron core binding structure which comprises a binding belt body which is made of Anecd semiconductor materials and bound on a transformer body. The transformer main body comprises an iron core frame, iron core columns and iron core yoke pieces, the iron core columns and the iron core yoke pieces are arranged on the iron core frame, the ribbon main body is bound on the iron core columns and the iron core yoke pieces, and a grounding wire is arranged on the ribbon main body; the ribbon main body is integrally formed, so that integral binding is realized, and the production efficiency can be improved; a grounding wire is welded on the cable tie main body, and the grounding wire is connected with the iron core frame to form equipotential so as to solve the problem of iron core outline sharp corner discharge; the Anecd semiconductor band material is used for binding the core column and the iron core yoke piece, so that the electric field distribution can be improved, the stray loss is reduced, the heat conduction is enhanced, the temperature is uniform, the mechanical stability is improved, and the maintenance and detection effects are simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer components, in particular to a large transformer core binding structure. Background Art

[0002] The transformer core frame mainly constitutes the magnetic circuit in the transformer electromagnetic field. The core frame is mainly composed of core columns, upper and lower yokes. However, the core column 2 and the core yoke 5 are made of many 0.3mm silicon steel sheets installed and stacked in a certain pattern. When the whole is stacked, the whole has no hardness. At this time, the core column 2 and the core yoke 5 need to be tied firmly before the lying frame can be lifted vertically.

[0003] The traditional core column 2 and core yoke 5 binding structure material is: non-woven glass ribbon or polyurethane PET tape 3 (such as Figure 1 and Figure 2 shown).

[0004] As transformer capacity increases and voltage levels rise, especially at 220kV and above, the use of flat glass ribbon or polyurethane PET ribbon 3 has the following defects:

[0005] 1. Lathless glass ribbon:

[0006] 1.1. Storage of flat glass ribbons requires certain environmental requirements: Flat glass ribbons should be stored in a dry, cool environment, with the temperature controlled between 15°C and 25°C. Excessively high temperatures may cause the glass ribbon to age and become brittle, shortening its service life; excessively low temperatures may also cause the glass ribbon to become brittle, and it may take longer for the ribbon to acclimate to the working environment temperature during winding.

[0007] 1.2. Lathless glass ribbons are relatively brittle and easily loosen or even break when subjected to external impact or vibration, affecting the fixing effect of the iron core.

[0008] 1.3. Tiny defects or impurities on the surface of the weftless glass ribbon can cause partial discharges under high electric field strength. Partial discharges can gradually damage the transformer's internal insulation material, degrading its insulation performance and potentially even causing transformer failure.

[0009] 1.4. The width and thickness of non-woven glass ribbons are usually small, requiring multiple layers of winding, which increases the time and difficulty of binding. For large transformers, the binding work requires a lot of manpower and time, and is inefficient.

[0010] 2. Polyurethane PET belt 3:

[0011] 2.1. The tensile strength of the polyurethane PET tape 3 is relatively low. During the operation of the transformer, as the core vibrates and the temperature changes, the polyurethane PET tape may be deformed after long-term operation, causing the core to loosen, affecting the performance and reliability of the transformer.

[0012] 2.2 Polyurethane PET tape 3 is relatively hard and less flexible than some other binding materials. In areas with complex core shapes or corners, the PET tape struggles to fit tightly, leaving gaps that affect the binding effect. This can cause the core to become partially loose during operation, increasing noise and vibration, and even damaging the transformer's internal insulation.

[0013] 2.3. Polyurethane PET tape 3 material is prone to static electricity. During the operation of the transformer, static electricity may absorb dust and impurities, affecting the heat dissipation of the transformer. When a large amount of static electricity accumulates on the surface of the polyurethane PET tape, the static electricity release will cause the transformer's partial discharge to exceed the standard, affecting the transformer's insulation performance.

[0014] 2.4. Polyurethane PET tape 3 has poor high-temperature resistance. Transformers generate heat during operation, especially under overload or fault conditions, which can cause transformer temperatures to rise. If the PET tape cannot withstand high temperatures, it may lose its binding and tightening effect, causing the core to loosen, affecting transformer performance and safety. Utility Model Content

[0015] The purpose of the present invention is to provide a large transformer core binding structure to solve the problems raised in the above background technology.

[0016] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a large transformer core binding structure, including a tie body, the tie body is made of Asecond semiconductor material, the tie body is tied to the transformer body, the transformer body includes an iron core frame and an iron core column and an iron core yoke sheet arranged on the iron core frame, the tie body is tied to the iron core column and the iron core yoke sheet, and a grounding wire is provided on the tie body. Using Asecond semiconductor tape material to bind the core column and the iron core yoke sheet can improve the electric field distribution, reduce stray losses, enhance heat conduction, uniform temperature, improve mechanical stability, and simplify maintenance and detection.

[0017] As a preferred embodiment of the present invention, the tie body is provided in multiple sections, and the multiple sections of the tie body are distributed in a rectangular array, thereby increasing the contact surface between the tie body and the transformer.

[0018] As a preferred embodiment of the present invention, the plurality of sections of the cable tie body are integrally formed, thereby achieving overall binding and improving production efficiency.

[0019] As a preferred embodiment of the present invention, the grounding wire is welded on the tie body, and the grounding wire is connected to the core frame to form an equipotential to solve the discharge problem at the sharp corners of the core outline.

[0020] As a preferred embodiment of the present invention, the core yoke sheet includes an upper iron yoke and a lower iron yoke, and the tie body is tied to the core column, the iron yoke and the lower iron yoke.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. Improve the electric field distribution: Asecond Semiconductor's cable ties have a certain degree of conductivity, which can evenly distribute the electric field and reduce the situation where the local electric field strength is too high, thereby reducing the risk of partial discharge caused by electric field concentration.

[0023] 2. Reduce stray losses: The proper conductivity of the Asecond semiconductor cable tie body can induce current to form a path inside it, reduce the generation of eddy currents, and reduce stray losses.

[0024] 3. Enhanced heat conduction: Asecond semiconductor binding can better conduct heat away from the core and improve heat dissipation efficiency. Good heat dissipation helps keep the transformer running at a low temperature, extending the life of the transformer, and also increasing the load capacity of the transformer.

[0025] 4. Uniform temperature: Asecond Semiconductor's cable tie body can distribute heat more evenly, making the temperature of each part of the core more uniform, avoiding local overheating, and reducing thermal stress and material aging problems caused by uneven temperature.

[0026] 5. Improved mechanical stability: Asecond Semiconductor's cable ties are typically strong and tough, which can better secure the core and improve the mechanical stability of the transformer. During transportation, installation, and operation, they can withstand certain external shocks and vibrations, reducing the risk of core loosening or displacement.

[0027] 6. Simplified maintenance and inspection: Since the Asecond Semiconductor cable tie body has a certain degree of conductivity, during maintenance and inspection, the core condition can be determined by measuring its resistance or other electrical parameters. This improves maintenance efficiency and reduces maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of a transformer tied with polyurethane PET tape in the prior art;

[0029] Figure 2 This is a schematic diagram of the structure of a polyurethane PET belt in the prior art;

[0030] Figure 3 This is a schematic diagram of the structure of the utility model of a cable tie main body for binding a transformer;

[0031] Figure 4 This is a schematic diagram of the main structure of the cable tie of the present utility model.

[0032] In the figure: 1. Core frame; 2. Core column; 4. Tie body; 5. Core yoke; 6. Ground wire. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0035] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0036] See also Figure 2-4 The utility model provides a technical solution: a large transformer core binding structure, including a tie body 4, the tie body 4 is made of Asecond semiconductor material, the tie body 4 is tied to the transformer body, the transformer body includes a core frame 1 and a core column 2 and a core yoke 5 arranged on the core frame 1, the tie body 4 is tied to the core column 2 and the core yoke 5, and a grounding wire 6 is provided on the tie body 4. Using Asecond semiconductor tape material to bind the core column and the core yoke 5 can improve the electric field distribution, reduce stray loss, enhance heat conduction, uniform temperature, improve mechanical stability, and simplify maintenance and detection.

[0037] Furthermore, the tie body 4 is provided in multiple sections, and the multiple sections of the tie body 4 are distributed in a rectangular row, thereby increasing the contact surface between the tie body 4 and the transformer.

[0038] Furthermore, the multiple sections of the cable tie body 4 are integrally formed to achieve overall binding and improve production efficiency.

[0039] Furthermore, the grounding wire 6 is welded on the tie body 4, and the grounding wire is connected to the core frame 1 to form an equipotential to solve the discharge of the sharp corners of the core outline.

[0040] Furthermore, the core yoke sheet 5 includes an upper iron yoke and a lower iron yoke, and the tie body 4 is tied to the core column 2, the iron yoke and the lower iron yoke.

[0041] In summary, the large transformer core binding structure can improve the electric field distribution, reduce stray losses, enhance heat conduction, uniform temperature, improve mechanical stability and simplify maintenance and inspection when used.

[0042] Improve electric field distribution. When the transformer is operating, an electric field exists around the core. Traditional binding materials are usually insulating, which can cause the electric field to concentrate in certain areas. Semiconductors, however, have a certain degree of conductivity and can evenly distribute the electric field, reducing localized excessive electric field strength and thus reducing the risk of partial discharge caused by electric field concentration.

[0043] Reducing stray losses: When the transformer operates, the changes in the core's magnetic flux generate a stray magnetic field. If the binding material is made of ordinary insulating material, this can induce eddy currents in the stray magnetic field, resulting in stray losses. The proper conductivity of the Asecond semiconductor tie body 4 induces current to form a path within it, reducing the generation of eddy currents and minimizing stray losses.

[0044] Enhanced heat conduction: Asecond semiconductor materials typically have better thermal conductivity than insulating materials. During transformer operation, the iron core generates heat. Using a tie body 4 made of Asecond semiconductor can effectively conduct heat away from the iron core, improving heat dissipation efficiency. This improved heat dissipation helps keep the transformer operating at a low temperature, extending its lifespan and increasing its load capacity.

[0045] The temperature is uniform. The tie body 4 of Asecond Semiconductor can distribute heat more evenly, making the temperature of each part of the core more uniform, avoiding local overheating, and reducing thermal stress and material aging problems caused by uneven temperature.

[0046] Improved mechanical stability: Asecond Semiconductor's cable tie body 4 typically has high strength and toughness, which can better secure the core and improve the mechanical stability of the transformer. During transportation, installation, and operation, it can withstand certain external shocks and vibrations, reducing the risk of the core loosening or displacement.

[0047] Simplify maintenance and inspection. Since the Asecond semiconductor cable tie body 4 has a certain conductivity, during the maintenance and inspection process, the state of the iron core can be judged by measuring its resistance or its electrical parameters. After inspection, if it is found that the resistance of the semiconductor belt changes, it may mean that the iron core has local overheating, looseness or other problems, so that corresponding maintenance measures can be taken in time. This detection method is relatively simple and intuitive, which improves maintenance efficiency and reduces maintenance costs.

[0048] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Large transformer core binding structure, characterized by: The invention comprises a tie body (4), wherein the tie body (4) is made of an Asecond semiconductor material, and the tie body (4) is tied to a transformer body, wherein the transformer body comprises an iron core frame (1) and an iron core column (2) and an iron core yoke (5) arranged on the iron core frame (1), and the tie body (4) is tied to the iron core column (2) and the iron core yoke (5), and a grounding wire (6) is arranged on the tie body (4).

2. The large transformer core binding structure according to claim 1, characterized in that: The cable tie main body (4) is arranged in multiple sections, and the multiple sections of the cable tie main body (4) are distributed in a rectangular array.

3. The large transformer core binding structure according to claim 1, characterized in that: The multiple sections of the cable tie body (4) are integrally formed.

4. The large transformer core binding structure according to claim 1, characterized in that: The grounding wire (6) is welded to the tie body (4), and the grounding wire is connected to the core frame (1) to form an equipotential.

5. The large transformer core binding structure according to claim 1, characterized in that: The iron core yoke sheet (5) comprises an upper iron yoke and a lower iron yoke.

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