An improved device for low-voltage busbars of oil-immersed transformers

Abstract

This utility model discloses an improved device for the low-voltage busbar of an oil-immersed transformer, belonging to the field of transformer manufacturing technology. It includes a transformer body on which a low-voltage busbar is installed. The low-voltage busbar includes an inner busbar and an outer busbar. The upper end of the inner busbar has a bent structure. A connecting piece and a bushing are also installed on the transformer body. The lower end of the connecting piece connects to the bent portion at the upper end of the inner busbar, and the upper end of the connecting piece connects to the lower end of the bushing. The improved inner busbar has its upper portions of phases a, b, and c bent to secure the low-voltage leads, ensuring strength and insulation performance. It is simple to manufacture and easy to operate. It significantly reduces manpower and material resources, and the overall process is more streamlined. It reduces process difficulty and lowers costs, resulting in significant economic benefits. The improved transformer is also more aesthetically pleasing after assembly.

Description

Technical Field

[0001] This utility model belongs to the field of transformer manufacturing technology, and in particular relates to an improved device for the low-voltage busbar of an oil-immersed transformer. Background Technology

[0002] Oil-immersed transformers use oil as insulation. Oil has good insulation properties and is inexpensive, making it the most common and standard insulation structure in the transformer industry. It is mainly used in conventional outdoor, high-voltage, and ultra-high-voltage applications. When connecting oil-immersed transformers to low-voltage leads, low-voltage busbars are required. Figures 1-3 As shown, the three phases a, b, and c of the inner busbar are usually led out directly from the end of the coil in a straight line. Then, four holes are drilled in each of them, and the three phases a, b, and c are tightened and fixed with screws and nuts through connecting busbars (copper busbars). Then, they are led to the lower part of the bushing and connected to the bottom of the bushing. However, this operation method is time-consuming and labor-intensive, which not only increases the labor force of workers, but also increases the manufacturing cost. Utility Model Content

[0003] In view of the above situation and to overcome the defects of the prior art, this utility model provides an improved device for the low-voltage busbar of an oil-immersed transformer.

[0004] The technical solution adopted by this utility model is as follows: An improved device for low-voltage conductor busbar of oil-immersed transformer includes a transformer body, on which a low-voltage conductor busbar is installed. The low-voltage conductor busbar includes an inner busbar and an outer busbar. The upper end of the inner busbar has a bent structure. A connecting piece and a bushing are also installed on the transformer body. The lower end of the connecting piece is connected to the bent part at the upper end of the inner busbar, and the upper end of the connecting piece is connected to the lower end of the bushing.

[0005] The lower end of the connecting piece and the upper end of the inner row can be connected by welding or bolts.

[0006] The upper end of the connector is connected to the lower end of the sleeve by bolts.

[0007] Both the inner and outer rows are installed on the transformer body, with the outer row located outside the inner row.

[0008] The beneficial effects of this utility model after adopting the above structure are as follows: The upper part of the improved inner row of three phases a, b, and c is made into a bent form according to the dimensions, and then welded to the connecting piece (made of 0.3mm copper sheet folded), and then connected and fixed to the appropriate position at the bottom of the bushing. Through this operation, the low voltage lead can be fixed well, and the strength performance, insulation performance and other aspects can be guaranteed. At the same time, the manufacturing method is simple and the actual operation is convenient; it greatly reduces manpower and material resources, and the overall steps are more concise; it reduces the difficulty of the process and the cost is lower, which has great economic benefits; the improved transformer is more beautiful after assembly. Attached Figure Description

[0009] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0010] Figure 1 This is a schematic diagram of the low-voltage busbar of an oil-immersed transformer.

[0011] Figure 2 This is a front view of an oil-immersed transformer.

[0012] Figure 3 This is a left view of an oil-immersed transformer.

[0013] Figure 4 This is a schematic diagram of the structure of the low-voltage conductive bus proposed in this utility model;

[0014] Figure 5 This is a front view of an improved low-voltage busbar device for an oil-immersed transformer proposed in this utility model.

[0015] Figure 6 for Figure 5 A magnified view of a portion at point A;

[0016] Figure 7 This is a left view of an improved low-voltage busbar device for an oil-immersed transformer proposed in this utility model.

[0017] Figure 8 for Figure 7 A magnified view of a portion of point B.

[0018] In the attached diagram: 1. Transformer body, 2. Low-voltage busbar, 3. Inner busbar, 4. Outer busbar, 5. Connecting piece, 6. Bushing, 7. Connecting busbar, 8. Tank cover. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0020] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0021] like Figures 4-8 As shown, an improved device for low-voltage busbars of an oil-immersed transformer includes a transformer body, on which a low-voltage busbar is installed. The low-voltage busbar includes an inner busbar and an outer busbar. The upper end of the inner busbar has a bent structure. A connecting piece and a bushing are also installed on the transformer body. The lower end of the connecting piece is connected to the bent part at the upper end of the inner busbar, and the upper end of the connecting piece is connected to the lower end of the bushing.

[0022] The lower end of the connector and the upper end of the inner row can be connected by welding or bolts.

[0023] The upper end of the connector is connected to the lower end of the sleeve by bolts.

[0024] Both the inner and outer rows are installed on the transformer body, with the outer row located outside the inner row.

[0025] The existing transformer body requires installation via connecting strips. The improved inner strip has the upper parts of phases A, B, and C bent to size, and then welded to the connecting plates (made of folded 0.3mm copper sheet). These are then connected and fixed to appropriate positions on the lower part of the bushing. This process also ensures the low-voltage leads are securely fixed, guaranteeing strength, insulation, and other performance aspects. Furthermore, the manufacturing method is simple, and the actual operation is convenient; it significantly reduces manpower and material resources, lowers the technological difficulty, and reduces costs.

[0026] Taking the S22-630 / 10 / 0.4 capacity transformer as an example, the unimproved transformer uses 46kg of conductive copper busbars in actual use, while the improved transformer uses only 21kg, saving nearly 25kg of connecting busbars (copper busbars). The price of connecting busbars (copper busbars) is about 75 yuan / kg, so the whole device saves 1875 yuan on connecting busbars. Moreover, the improved transformer saves 20 screws and nuts. The price of a single screw and nut is about 0.1-0.5 yuan, so the whole device saves 2-10 yuan on connecting busbars, which has huge economic benefits.

[0027] Meanwhile, the unmodified transformer typically requires about 30 minutes of manual labor to assemble, while the improved transformer typically requires about 10 minutes, saving nearly 2 / 3 of the labor time and significantly reducing labor costs. Furthermore, the overall process is simpler and easier to operate; and the improved transformer is also more aesthetically pleasing after assembly.

[0028] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents. In conclusion, if those skilled in the art, inspired by this description, design similar structural methods and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An improved device for the low-voltage busbar of an oil-immersed transformer, characterized in that, The transformer includes a transformer body, on which a low-voltage busbar is installed. The low-voltage busbar includes an inner busbar and an outer busbar. The upper end of the inner busbar has a bent structure. A connecting piece and a bushing are also installed on the transformer body. The lower end of the connecting piece is connected to the bent part at the upper end of the inner busbar, and the upper end of the connecting piece is connected to the lower end of the bushing.

2. The improved device for low-voltage conductor busbar of an oil-immersed transformer according to claim 1, characterized in that, The lower end of the connector and the upper end of the inner row can be connected by welding or bolts.

3. The improved device for low-voltage conductor busbar of an oil-immersed transformer according to claim 1, characterized in that, The upper end of the connector is connected to the lower end of the sleeve by bolts.

4. The improved device for low-voltage conductor busbar of an oil-immersed transformer according to claim 1, characterized in that, Both the inner and outer rows are installed on the transformer body, with the outer row located outside the inner row.

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