Connecting structure of upper oil tank and lower oil tank of transformer
By using a lower tank edge that is larger than the upper tank edge, an annular sealing gasket, asbestos rope, and a protective frame structure at the connection between the upper and lower tank sections of the transformer, the sealing problem of the transformer in a highly corrosive environment is solved, achieving better corrosion resistance and mechanical strength.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG LUNENG TAISHAN POWER EQUIP CO LTD
- Filing Date
- 2025-01-07
- Publication Date
- 2026-05-19
AI Technical Summary
Existing transformers are prone to rusting at the tank connection points in highly corrosive and salt spray environments, which affects sealing performance and leads to unstable transformer operation.
The structure employs a lower box edge that is larger than the upper box edge, an annular sealing gasket, asbestos rope, and a protective frame, combined with a limiting support plate, to form a symmetrical connection, avoiding bolt holes and increasing corrosion resistance and strength.
This improves the corrosion resistance and mechanical strength of the transformer tank, ensuring its long-term sealing and reliability.
Smart Images
Figure CN224263901U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of transformer technology, and in particular to a connection structure for the upper and lower oil tanks of a transformer. Background Technology
[0002] Currently, the harsh environment at sea and along the coast, including salt spray, mold, and hot and humid conditions, can damage transformers. Therefore, offshore wind power and coastal transformers must possess stronger weather resistance and resistance to weathering and corrosion.
[0003] Existing transformers have bolt holes drilled on the edge of the tank connecting the upper and lower sections, and the upper and lower sections are connected by bolts. A large transformer requires about 150 ∅28 holes. Due to the high corrosion resistance requirements in highly corrosive and salt spray areas, and the small diameter of the holes, the edges of the holes cannot be rounded, and the edges are mostly right angles. The paint adhesion at right angles is poor, and effective anti-corrosion measures cannot be taken. As a result, this structure is very prone to rusting in highly corrosive and salt spray environments, which damages the sealing performance of the transformer and affects the long-term normal use of the transformer.
[0004] The information disclosed in the background section is only intended to enhance the understanding of the background of this utility model, and therefore may contain information that does not constitute prior art known to those skilled in the art. Utility Model Content
[0005] To address the shortcomings or defects of the existing technology, a connection structure for the upper and lower sections of the transformer oil tank is provided, which improves corrosion resistance, ensures the strength of the transformer oil tank, and has a simple, practical, and highly applicable structure.
[0006] The purpose of this utility model is achieved through the following technical solutions.
[0007] A connection structure for the upper and lower oil tanks of a transformer includes,
[0008] The upper fuel tank has an outwardly extending upper tank rim.
[0009] The lower fuel tank has an outwardly extending lower tank rim.
[0010] A sealing gasket is disposed between the upper section edge and the lower section edge, the upper section edge being fixedly connected to the lower section edge.
[0011] Asbestos rope, which is used to seal the outside of the gasket.
[0012] The limiting support plate is welded to the lower section of the oil tank, and the upper end of the limiting support plate is in close contact with the upper section of the oil tank.
[0013] In the aforementioned connection structure of the upper and lower oil tanks of the transformer, the outer dimensions of the lower tank edge are larger than those of the upper tank edge.
[0014] In the connection structure between the upper and lower oil tanks of the transformer, the sealing gasket is a ring structure.
[0015] In the aforementioned connection structure of the upper and lower oil tanks of the transformer, the protective frame is located between the upper tank edge and the lower tank edge and is fixedly connected to the upper tank edge and the lower tank edge.
[0016] In the connection structure of the upper and lower oil tanks of the transformer, the protective frame surrounds the sealing gasket and the asbestos rope.
[0017] In the aforementioned connection structure between the upper and lower oil tanks of the transformer, the dimensions of the protective frame in each direction are 20mm larger than the edge of the upper tank.
[0018] In the aforementioned connection structure of the upper and lower oil tanks of the transformer, the lower tank is 20mm larger than the dimensions of the protective frame in each direction.
[0019] In the aforementioned connection structure of the upper and lower oil tanks of the transformer, the upper tank, the protective frame, and the lower tank have similar structures.
[0020] In the connection structure of the upper and lower oil tanks of the transformer, the corners of the upper tank, the protective frame and the lower tank are all provided with rounded corners.
[0021] In the aforementioned connection structure between the upper and lower oil tanks of the transformer, the connection structure is a symmetrical structure.
[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0023] This utility model features a simple structure, safety and reliability, and easy disassembly, solving the problem of corrosion prevention at the tank edge connection of transformers in highly corrosive and high-salt-spray environments. It improves corrosion resistance and ensures the strength of the transformer tank.
[0024] The description is merely an overview of the technical solution of this utility model. In order to make the technical means of this utility model clearer and more understandable, so that those skilled in the art can implement it according to the contents of the specification, and in order to make the described and other objects, features and advantages of this utility model more obvious and easy to understand, specific embodiments of this utility model are illustrated below. Attached Figure Description
[0025] Various other advantages and benefits of this invention will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this invention. Obviously, the drawings described below are merely some embodiments of this invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. Furthermore, the same reference numerals denote the same parts throughout the drawings.
[0026] In the attached diagram:
[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0028] Figure 2 This is a schematic diagram of the limiting support plate of this utility model;
[0029] Figure 3 This is a schematic diagram of the sealing gasket of this utility model;
[0030] Figure 4 This is a schematic diagram of the upper section edge of the present invention;
[0031] Figure 5 This is a schematic diagram of the structure of the protective frame of this utility model;
[0032] Figure 6 This is a schematic diagram of the structure of the lower section of the box edge of this utility model;
[0033] Figure 7 This is a welding schematic diagram of the present invention.
[0034] The present invention will be further explained below with reference to the accompanying drawings and embodiments. Detailed Implementation
[0035] Specific embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While specific embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.
[0036] It should be noted that certain terms are used in the specification and claims to refer to specific components. Those skilled in the art will understand that different terms may be used to refer to the same component. This specification and claims do not distinguish components based on differences in terminology, but rather on differences in function. The terms "comprising" or "including" used throughout the specification and claims are open-ended and should be interpreted as "comprising but not limited to." The following descriptions of the preferred embodiments of the present invention are for the purpose of implementing the general principles of the specification and are not intended to limit the scope of the present invention. The scope of protection of this invention shall be determined by the appended claims.
[0037] To facilitate understanding of the embodiments of this utility model, the following will provide further explanation and description with reference to the accompanying drawings and several specific embodiments. The accompanying drawings do not constitute a limitation on the embodiments of this utility model.
[0038] To better understand, such as Figures 1 to 7 As shown, a connection structure for the upper and lower oil tanks of a transformer includes,
[0039] The upper section of the fuel tank has an outwardly extending upper section edge 3.
[0040] The lower section of the fuel tank has an outwardly extending lower section edge 6.
[0041] A sealing gasket 2 is disposed between the upper section edge 3 and the lower section edge 6, wherein the upper section edge 3 is fixedly connected to the lower section edge 6.
[0042] Asbestos rope 5 is used to seal the outside of the sealing gasket 2.
[0043] Limiting support plate 1 is welded to the lower section of the oil tank, and the upper end of the limiting support plate 1 is in close contact with the upper section of the oil tank.
[0044] In a preferred embodiment of the connection structure between the upper and lower oil tanks of the transformer, the outer dimensions of the lower tank edge 6 are larger than the outer dimensions of the upper tank edge 3.
[0045] In a preferred embodiment of the connection structure between the upper and lower oil tanks of the transformer, the sealing gasket 2 is an annular structure.
[0046] In a preferred embodiment of the connection structure between the upper and lower oil tanks of the transformer, the protective frame 4 is disposed between the upper tank edge 3 and the lower tank edge 6 and is fixedly connected to the upper tank edge 3 and the lower tank edge 6.
[0047] In a preferred embodiment of the connection structure between the upper and lower oil tanks of the transformer, the protective frame 4 surrounds the sealing gasket 2 and the asbestos rope 5.
[0048] In a preferred embodiment of the connection structure between the upper and lower oil tanks of the transformer, the dimensions of the protective frame 4 in all directions are 320mm larger than the edge of the upper tank.
[0049] In a preferred embodiment of the connection structure between the upper and lower oil tanks of the transformer, the lower tank 6 is 20mm larger than the dimensions of the protective frame 4 in each direction.
[0050] In a preferred embodiment of the connection structure between the upper and lower oil tanks of the transformer, the upper tank, the protective frame 4, and the lower tank have similar structures.
[0051] In a preferred embodiment of the connection structure between the upper and lower oil tanks of the transformer, the corners of the upper tank, the protective frame 4, and the lower tank are all provided with rounded corners.
[0052] In a preferred embodiment of the connection structure between the upper and lower oil tanks of the transformer, the connection structure is a symmetrical structure.
[0053] In one embodiment, the connection structure of the upper and lower tank sections of the transformer includes: an upper tank edge 3, a lower tank edge 6, a limiting support plate 1, a sealing gasket 2, and an asbestos rope 5. The limiting support plate 1 needs to be welded onto the lower tank section. The outer dimensions of the lower tank edge 6 are larger than those of the upper tank edge 3, and no bolt holes are required for the lower tank edge 6. The upper tank edge 3 and the lower tank edge 6 are welded together after the transformer has passed the test. When welding the upper tank edge 3 and the lower tank edge 6, the sealing gasket 2 must be laid flat first, and the outside of the sealing gasket 2 is filled with asbestos rope 5. In this embodiment, the national standard stipulates that the mechanical strength of the transformer tank should withstand a vacuum residual pressure of 133 Pa without damage or unacceptable permanent deformation. To prevent permanent deformation during the mechanical strength test of the tank, limiting support plates 1 are added in four directions inside the transformer tank. Because there are no bolts securing the tank edges, misalignment of the upper and lower tank edges 6 is likely to occur, leading to leakage. Therefore, the upper and lower tank sections should only be welded after the transformer has passed the final product test. Since there is a 20mm dimensional difference in all directions between the upper tank edge 3 and the protective frame 4, and between the protective frame 4 and the upper tank edge 3, the weld height can be effectively guaranteed. During welding, asbestos rope 5 is placed outside the sealing gasket 2, and then the upper and lower tank sections are clamped with tools to prevent sparks or fumes from entering the tank during welding. After the upper and lower tank edges 6 are welded, the sharp corners and burrs at the weld are ground off, and then an anti-corrosion agent is applied to the weld to ensure that the transformer does not leak during long-term operation.
[0054] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.
[0055] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.
Claims
1. A connection structure for the upper and lower oil tanks of a transformer, characterized in that, It includes, The upper fuel tank has an outwardly extending upper tank rim. The lower fuel tank has an outwardly extending lower tank rim. A sealing gasket is disposed between the upper section edge and the lower section edge, the upper section edge being fixedly connected to the lower section edge. Asbestos rope, which is used to seal the outside of the gasket. A limiting support plate is welded to the lower section oil tank, with its upper end tightly attached to the upper section oil tank. A protective frame is located between the upper section tank edge and the lower section tank edge and is fixedly connected to the upper section tank edge and the lower section tank edge. The outer dimensions of the lower section tank edge are larger than those of the upper section tank edge. Since there are no bolts to fasten the tank edges, the upper and lower tank sections are welded together, and no bolt holes are required for the lower section tank edge. The sealing gasket has a ring structure.
2. The connection structure of the upper and lower oil tanks of the transformer as described in claim 1, characterized in that, The protective frame surrounds the sealing gasket and asbestos rope.
3. The connection structure of the upper and lower oil tanks of the transformer as described in claim 1, characterized in that, The dimensions of the protective frame in all directions are 20mm larger than the edge of the upper section box.
4. The connection structure of the upper and lower oil tanks of the transformer as described in claim 1, characterized in that, The lower section box edge is 20mm larger than the dimensions of the guard frame in each direction.
5. The connection structure of the upper and lower oil tanks of the transformer as described in claim 1, characterized in that, The upper section box, the protective frame, and the lower section box have similar structures.
6. The connection structure of the upper and lower oil tanks of the transformer as described in claim 1, characterized in that, The corners of the upper section box, the protective frame, and the lower section box are all provided with rounded corners.
7. The connection structure of the upper and lower oil tanks of the transformer as described in claim 1, characterized in that, The connection structure is a symmetrical structure.