Insulation structure between low-voltage sections of axial split photovoltaic transformer

Abstract

The utility model discloses an insulation structure between low-voltage sections of an axial split photovoltaic transformer, and relates to the field of oil immersed transformers. The insulating paper tape comprises a paper tape body, a plurality of cushion blocks are arranged on the surface of the paper tape body, the cushion blocks are linearly arranged at equal intervals along the length line of the paper tape body, and the cushion blocks are used for supporting and separating two low-voltage coils for insulation. Compared with a traditional oval insulation end ring structure, the insulation end ring structure has the remarkable advantages that the difficulty is large and the efficiency is low due to the fact that the traditional insulation end ring structure needs to be machined through a special tool, the insulation end ring structure adopts the structure of the paper tape and the cushion block, the machining process is simplified, and the production cost is reduced. The production efficiency is improved, the use of an original oval large supporting paperboard is reduced, and the material consumption of the insulation structure is reduced.

Description

Technical Field

[0001] The utility model relates to the field of oil-immersed transformers, in particular to an axially split photovoltaic transformer low-voltage inter-segment insulation structure. Background Art

[0002] The insulating end ring of the transformer low-voltage coil is a key component to ensure the safe operation of the transformer. It is made of insulating cardboard or other insulating materials, fits tightly to the coil, provides effective insulation protection, prevents current short circuit, and supports and fixes the coil to prevent it from moving or deforming. The insulating end ring must have good insulation performance, mechanical strength and heat resistance to cope with various challenges in transformer operation.

[0003] In order to meet the requirements of photovoltaic split transformer split impedance, the current axially split low-voltage coil, in this design, the inter-segment insulation between the upper and lower low-voltage coils of the low-voltage axial split is crucial. Traditionally, an insulating end ring structure is adopted (after retrieval, the application number is: 202322310958.8, a transformer insulating end ring structure and a transformer insulating molding structure), but this structure has some significant challenges in the manufacturing process. First, special tools are required to process elliptical paper rings and pads, which not only increases the processing difficulty but also reduces production efficiency. In addition, due to the complexity of this structure, more materials are required, resulting in low material utilization and increased costs. In summary, although the traditional insulating end ring structure plays a certain role in the inter-segment insulation of the low-voltage coil, its processing difficulty, efficiency and cost issues cannot be ignored. Therefore, it is urgent to seek a more optimized solution to improve production efficiency, reduce costs and improve material utilization. Utility Model Content

[0004] Based on this, the purpose of the utility model is to provide an axially split photovoltaic transformer low-voltage inter-segment insulation structure to solve the technical problems that the processing of elliptical paper circles requires special tools, the processing is difficult and inefficient; and the material usage is large, the material utilization rate is low, and the cost is high.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an axially split photovoltaic transformer low-voltage segment insulation structure, comprising a paper tape, a plurality of pads are arranged on the surface of the paper tape, and the plurality of pads are arranged linearly and equidistantly along the length line of the paper tape, and the pads are used to support and separate and insulate two low-voltage coils.

[0006] By adopting the above technical solution, the new structure uses paper tapes and pads to replace the complex elliptical end rings, thereby simplifying the processing process and improving production efficiency, reducing dependence on special tools, and reducing processing difficulty.

[0007] Furthermore, the paper tape is used to provide support force for the cushion block, and the paper tape is adhered to the outer side of the paper tube inside the low-voltage coil.

[0008] By adopting the above technical solution, the paper tape provides the supporting force required by the spacer, ensuring that it is firmly placed between the low-voltage coils, and effectively maintaining the spacing and insulation state between the two low-voltage coils.

[0009] Furthermore, the cushion block has two but not limited to two size and structural forms.

[0010] By adopting the above technical solution, spacers of different sizes can better adapt to low-voltage coils of different specifications and designs, improving the versatility and flexibility of the insulation structure, which means that no matter how the size or shape of the coil changes, suitable spacers can be found to ensure good insulation effect.

[0011] Furthermore, a protrusion is provided on the cushion block, and the protrusion is opposite to the gap position of the I-shaped airway support strip adjacent to the low-voltage coil and is plugged into each other.

[0012] By adopting the above technical solution, the design of the protrusion enhances the stability between the gasket and the low-voltage coil. By inserting the protrusion into the gap between the I-shaped airway support bar, the gasket is firmly fixed in a predetermined position, effectively preventing the gasket from moving or loosening.

[0013] Furthermore, the protrusion is used to limit the positions of the upper and lower low-voltage coils.

[0014] By adopting the above technical solution, the protrusion ensures the stability of the low-voltage coil. Through the limiting effect of the protrusion, the upper and lower low-voltage coils are precisely fixed in predetermined positions, effectively preventing the coils from shifting or deforming due to vibration or external force, thereby ensuring the normal operation of the transformer.

[0015] Furthermore, a through hole is provided on the inner side of the protrusion, and the through hole is used for the circulation of mineral oil inside the transformer.

[0016] By adopting the above technical solution, the through hole promotes the flow of mineral oil, which is beneficial to heat dissipation. The mineral oil flows freely through the through hole, which can quickly take away the heat generated by the coil, prevent local overheating, and ensure the stable operation of the transformer.

[0017] Furthermore, inclined surfaces are provided at the upper and lower corners of the protrusion, and the inclined surfaces are used for guiding the insertion of the protrusion and the low-voltage coil.

[0018] By adopting the above technical solution, the inclined surface provides a convenient guide for the insertion of the protrusion and the low-voltage coil, making the assembly process smoother and more accurate, and reducing the difficulty and time cost of assembly.

[0019] Furthermore, the paper tape, the pad and the protrusion are all insulating paperboard.

[0020] By adopting the above technical solution and using insulating paperboard as the material, electrical insulation can be effectively provided to prevent current leakage or short circuit, thereby ensuring the safe operation of the transformer.

[0021] In summary, the utility model mainly has the following beneficial effects:

[0022] 1. The utility model uses paper tape and pads to carefully stick the paper tape on the outer wall of the paper tube inside the low-voltage coil, ensuring that the paper tape fits tightly with the paper tube to provide a stable support foundation. The length of the paper tape is exactly equal to the circumference of the paper tube, so that the paper tube can be completely wrapped to provide a comprehensive fixing effect. Next, the pads are placed at the bottom of the first low-voltage coil. The function of these pads is to effectively insulate the two low-voltage coils. The pads must not only have good insulation performance, but also be able to bear the weight of the coil and provide stable support. Compared with the traditional elliptical insulating end ring structure, it has significant advantages. The traditional insulating end ring structure requires the use of special tools for processing, which is not only difficult but also inefficient. This bonding structure adopts the structure of paper tape and pads, which simplifies the processing process, improves production efficiency, reduces the use of the original elliptical large supporting cardboard, and reduces the amount of consumables of the insulating structure;

[0023] 2. The utility model sets a bump and a through hole, and the plug-in method of the bump effectively limits the position of the upper and lower low-voltage coils, ensures the stability and precise positioning of the coils, helps prevent the coils from moving or misaligned, and improves the structural stability and safety of the transformer. At the same time, the through hole design on the inner side of the bump promotes the circulation of mineral oil between the upper and lower low-voltage coils, which not only improves the heat dissipation performance, so that the heat generated by the coils can be taken away by the mineral oil more quickly, but also enhances the insulation, because good oil flow can better fill the gaps, reduce the risk of electrical failures, and improve the insulation and heat dissipation of the transformer, thereby extending its service life and improving operational reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model in an unused state;

[0025] Figure 2 This is a three-dimensional structural schematic diagram of the utility model in use;

[0026] Figure 3 It is a side view structural schematic diagram of the utility model;

[0027] Figure 4 For this utility model Figure 2 Schematic diagram of the structure enlarged at point A in the middle.

[0028] In the figure: 1, paper tape; 2, pad; 3, bump; 4, through hole; 5, inclined surface. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0030] The following describes an embodiment of the utility model based on its overall structure.

[0031] Embodiment 1:

[0032] An axially split photovoltaic transformer low voltage inter-segment insulation structure, such as Figure 1-Figure 4 As shown, it includes a paper tape 1, and a plurality of pads 2 are arranged on the surface of the paper tape 1. The plurality of pads 2 are arranged linearly and equidistantly along the length line of the paper tape 1. The pads 2 are used to support and separate the two low-voltage coils for insulation. The new structure adopts the paper tape 1 and the pads 2 to replace the complex elliptical end rings, thereby simplifying the processing process and improving production efficiency, reducing dependence on special tools, and reducing processing difficulty. At the same time, the new structure reduces the use of the original large elliptical support cardboard, effectively reducing the amount of consumables of the insulating structure, which not only saves costs but also improves material utilization.

[0033] See also Figure 1 , Figure 2 , Figure 3 , paper tape 1 is used to provide support for the pad 2. Paper tape 1 is adhered to the outer side of the paper tube inside the low-voltage coil. The paper tape provides the support required for the pad 2, ensuring that it is firmly placed between the low-voltage coils, and effectively maintaining the spacing and insulation state between the two low-voltage coils. At the same time, paper tape 1 is tightly adhered to the outer side of the paper tube inside the low-voltage coil, which not only enhances the stability of the entire insulation structure, but also enables the pad 2 to be precisely laid out according to the designed position.

[0034] See also Figure 1 , Figure 2 , Figure 3 The spacer 2 has two but not limited to two size structural forms. Spacers 2 of different sizes can better adapt to low-voltage coils of different specifications and designs, thereby improving the versatility and flexibility of the insulation structure. This means that no matter how the size or shape of the coil changes, a suitable spacer 2 can be found to ensure a good insulation effect. At the same time, the diverse sizes of spacers 2 help to optimize space utilization and reduce unnecessary material waste. By selecting the appropriate size of spacers 2, the gaps between the low-voltage coils can be more effectively filled, thereby improving the compactness and stability of the overall structure, which not only saves material costs, but also helps to improve the overall performance of the transformer.

[0035] Embodiment 2:

[0036] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 A protrusion 3 is provided on the pad 2, and the protrusion 3 is opposite to the gap of the I-shaped airway support bar adjacent to the low-voltage coil and is plugged into it. The design of the protrusion 3 enhances the stability between the pad and the low-voltage coil. By plugging the protrusion 3 into the gap of the I-shaped airway support bar, the pad 2 is firmly fixed in a predetermined position, effectively preventing the movement or loosening of the pad. At the same time, the heat dissipation performance is also improved. The close combination of the protrusion and the airway support bar facilitates the circulation of mineral oil between the upper and lower low-voltage coils, thereby dissipating heat more effectively and ensuring that the transformer maintains a good working condition during long-term operation.

[0037] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 The protrusion 3 is used to limit the position of the upper and lower low-voltage coils. The protrusion 3 ensures the stability of the low-voltage coils. Through the limiting effect of the protrusion 3, the upper and lower low-voltage coils are accurately fixed at the predetermined position, effectively preventing the coils from shifting or deforming due to vibration or external force, thereby ensuring the normal operation of the transformer. At the same time, the precise limitation of the coil position by the protrusion 3 also helps to improve the safety and reliability of the transformer. The stable coil position means less mechanical stress and electrical failure risk, thereby extending the service life of the transformer and reducing maintenance costs.

[0038] See also Figure 1 , Figure 2 , Figure 4 A through hole 4 is provided on the inner side of the protrusion 3. The through hole 4 is used for the circulation of mineral oil inside the transformer. The through hole 4 promotes the flow of mineral oil and is beneficial to heat dissipation. The mineral oil flows freely through the through hole, which can quickly take away the heat generated by the coil, prevent local overheating, and ensure the stable operation of the transformer. At the same time, the through hole 4 also enhances the insulation performance of the transformer. The flowing mineral oil can better fill the gaps in the insulation structure, improve the overall insulation effect, and reduce the risk of electrical failures, which not only prolongs the service life of the transformer, but also improves its safety and reliability.

[0039] See also Figure 3 , Figure 4The upper and lower corners of the protrusion 3 are both provided with inclined surfaces 5, which are used for guiding the insertion of the protrusion 3 and the low-voltage coil. The inclined surface 5 provides a convenient guide for the insertion of the protrusion 3 and the low-voltage coil, making the assembly process smoother and more accurate, reducing the assembly difficulty and time cost. At the same time, the inclined surface structure also helps to reduce friction and resistance during assembly, avoid possible assembly damage, and improve assembly quality. It not only optimizes the assembly process, but also provides convenience for subsequent maintenance and overhaul, further improving the overall performance and reliability of the transformer.

[0040] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 The paper tape 1, the pad 2 and the protrusion 3 are all insulating cardboard. Using insulating cardboard as the material can effectively provide electrical insulation and prevent current leakage or short circuit, thereby ensuring the safe operation of the transformer. At the same time, the insulating cardboard also has good mechanical strength and high temperature resistance, and can maintain the stability and durability of the structure. In addition, the insulating cardboard is relatively easy to process and shape, which is convenient for cutting, folding and assembly during the manufacturing process, thereby improving production efficiency. The choice not only meets the insulation needs of the transformer, but also takes into account production efficiency and cost-effectiveness.

[0041] The implementation principle of the utility model is as follows: first, a paper tape 1 is adhered to the outer side of the paper tube inside the low-voltage coil, and a cushion block 2 is placed at the bottom of the first low-voltage coil to insulate the two low-voltage coils, and the original oval-shaped insulating end ring upper and lower surfaces are adhered to the large cushion block structure of the oil passage, which is improved to a paper tape 1 adhered to the small cushion block structure of the oil passage. When placed, the paper tape 1 is closely attached to the outer wall of the paper tube inside the low-voltage coil, and the length is the circumference of the paper tape 1, which plays the role of fixing the cushion block 2; the cushion block 2 adhered to the paper tape plays the role of supporting the low-voltage coil and dissipating heat between the upper and lower sections of the low-voltage coil;

[0042] The convex block 3 is inserted into the gap between the adjacent I-shaped airway stays, which is beneficial to limit the positions of the upper and lower low-voltage coils. At the same time, the inner through hole 4 can improve the mineral oil circulation between the upper and lower low-voltage coils, thereby improving insulation and heat dissipation.

[0043] In some other embodiments, the application number is: 202322013081.6, a novel low-pressure two-in-one integrated coil structure, and the I-shaped airway support and other structures proposed in the utility model can be used as the existing coil structure for explanation (not reflected in the drawings of the utility model);

[0044] In some other embodiments, the application number is: 202322310958.8, an insulating end ring structure of a transformer and a transformer insulation molding structure, and the insulating end ring shown in the utility model can be used as an existing insulation structure for illustration.

[0045] Parts not involved in the present invention are the same as the prior art or can be implemented by using the prior art, and will not be described in detail here.

[0046] Although an embodiment of the utility model has been shown and described, this specific embodiment is only an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contribution as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. An axially split photovoltaic transformer low voltage inter-segment insulation structure, characterized in that: It comprises a paper tape (1), wherein a plurality of pads (2) are arranged on the surface of the paper tape (1), wherein the plurality of pads (2) are arranged linearly and equidistantly along the length line of the paper tape (1), and the pads (2) are used to support and separate and insulate two low-voltage coils.

2. The axially split photovoltaic transformer low voltage inter-segment insulation structure according to claim 1 is characterized in that: The paper tape (1) is used to provide support force for the cushion block (2), and the paper tape (1) is adhered to the outer side of the paper tube inside the low-voltage coil.

3. The axially split photovoltaic transformer low voltage inter-segment insulation structure according to claim 1 is characterized in that: The cushion block (2) has two, but not limited to, two, size and structural forms.

4. The axially split photovoltaic transformer low voltage inter-segment insulation structure according to claim 1 is characterized in that: The cushion block (2) is provided with a protrusion (3), and the protrusion (3) is opposite to the gap position of the adjacent I-shaped airway support strip of the low-voltage coil and is inserted into it.

5. The axially split photovoltaic transformer low voltage inter-segment insulation structure according to claim 4 is characterized in that: The protrusion (3) is used to limit the positions of the upper and lower low-voltage coils.

6. The axially split photovoltaic transformer low voltage inter-segment insulation structure according to claim 4 is characterized in that: A through hole (4) is provided on the inner side of the convex block (3), and the through hole (4) is used for the circulation of mineral oil inside the transformer.

7. The axially split photovoltaic transformer low voltage inter-segment insulation structure according to claim 4 is characterized in that: Inclined surfaces (5) are provided at the upper and lower corners of the protrusion (3), and the inclined surfaces (5) are used for guiding the insertion of the protrusion (3) and the low-voltage coil.

8. The axially split photovoltaic transformer low voltage inter-segment insulation structure according to claim 1 is characterized in that: The paper tape (1), the cushion block (2) and the protrusion (3) are all insulating paperboards.

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