Transformer grounding flexible lead system capable of reducing stress

Abstract

The utility model relates to a transformer grounding flexible lead wire system capable of reducing stress. The transformer grounding flexible lead wire system capable of reducing stress comprises a grounding sleeve and a grounding copper bar which are arranged on the top of a transformer, a flexible connecting piece is connected between the grounding sleeve and the grounding copper bar, and a flexible connecting lead wire is connected between the grounding copper bar located on the lower portion of the transformer and a grounding grid. At least one group of arched bulges are arranged on the surface of the flexible connecting sheet; fixing points are arranged on the two sides of the arch-shaped protrusion of the flexible connecting piece. The flexible connection lead is a flexible copper stranded wire; according to the transformer grounding flexible lead wire system capable of reducing the stress, the flexible lead wire is beneficial for an online monitoring system to monitor the current of the grounding lead wire in real time, and the system is simple in structure, easy to manufacture and high in practicability.

Description

Technical Field

[0001] This utility model belongs to the field of transformer structure technology, specifically relating to a transformer grounding flexible lead system for reducing stress. Background Technology

[0002] To ensure the safe and reliable operation of power transformers and prevent stress buildup at the connection between the grounding lead and the top grounding bushing during transformer vibrations caused by sudden events such as earthquakes, which could damage the grounding bushing, leading to oil leaks or even water ingress and serious accidents, it is crucial to address these issues. Furthermore, at the connection between the lower grounding lead and the grounding grid, rigid connections can cause localized stress concentrations due to accumulated tolerances, making the grounding lead highly susceptible to deformation.

[0003] Based on the study of transformer structure and grounding lead system, a stress-reducing flexible grounding lead system for transformers is proposed, which can effectively avoid the stress concentration phenomenon of the above-mentioned grounding leads and protect the safety of the transformer grounding system. Utility Model Content

[0004] The purpose of this invention is to provide a transformer grounding flexible lead system with a simple structure and reasonable design to reduce stress in order to solve the above problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A stress-reducing transformer grounding flexible lead system includes a grounding bushing and a grounding copper busbar installed at the top of the transformer, with a flexible connecting piece connecting the grounding bushing and the grounding copper busbar, and a flexible connecting lead connecting the grounding copper busbar located at the bottom of the transformer to the grounding grid.

[0007] As a further optimization of this utility model, the flexible connecting piece is a multi-layer flexible copper strip.

[0008] As a further optimization of this utility model, the surface of the flexible connecting piece is provided with at least one set of arched protrusions.

[0009] As a further optimization of this utility model, fixing points are provided on both sides of the arched protrusion of the flexible connecting piece.

[0010] As a further optimization of this utility model, the flexible connection lead is a flexible copper stranded wire.

[0011] As a further optimization of this utility model, the flexible connector lead is provided with a reserved section.

[0012] As a further optimization of this utility model, the flexible connecting lead includes an outer tube and an inner spiral wire body.

[0013] The beneficial effects of this utility model are as follows: This utility model can ensure that the transformer grounding bushing will not be damaged by stress at the connection position between the grounding lead and the grounding bushing at the top of the transformer due to sudden situations such as earthquakes, which could lead to transformer oil leakage and further failures. In the lower part of the transformer, the use of flexible connection also solves the problem of local stress concentration caused by tolerance accumulation when the grounding lead is rigidly connected to the grounding grid. At the same time, it is also beneficial for the online monitoring system to monitor the grounding lead current in real time. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the flexible connecting piece of this utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the flexible connector lead of this utility model;

[0017] Figure 4 This is another structural schematic diagram of the flexible connector lead of this utility model.

[0018] In the diagram: 1, grounding bushing; 2, flexible connector; 3, grounding copper busbar; 4, flexible connector lead. Detailed Implementation

[0019] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0020] refer to Figures 1 to 3 The structure shown is a transformer grounding flexible lead system for reducing stress. The system includes a grounding bushing 1 and a grounding copper busbar 3 installed on the top of the transformer. A flexible connecting piece 2 is connected between the grounding bushing 1 and the grounding copper busbar 3. A flexible connecting lead 4 is connected between the grounding copper busbar 3 located at the bottom of the transformer and the grounding grid.

[0021] It should be noted that the flexible connector 2 and the flexible lead are conducive to the real-time monitoring of the grounding lead current by the online monitoring system. This system has a simple structure, is easy to manufacture, and is highly practical.

[0022] It should be further noted that the flexible connecting piece 2 is a multi-layered soft copper strip; the multi-layered soft copper strips are stacked together, which can deform to a certain extent, thereby achieving the purpose of flexible connection.

[0023] It should be further noted that the surface of the flexible connecting piece 2 is provided with at least one set of arched protrusions. The presence of at least one set allows for better deformation capability.

[0024] It should be further noted that fixing points are provided on both sides of the arched protrusion of the flexible connecting piece 2. By setting fixing points, the arch can be made more orderly, so that it can function when needed without having a significant impact on the surrounding environment.

[0025] It should be further noted that the flexible connecting lead 4 is a flexible copper stranded wire. The flexible connecting lead 4 has a reserved section. An online grounding lead cable monitoring system can also be installed at this section of the flexible copper stranded wire, which is beneficial for monitoring the grounding current.

[0026] This application ensures that the grounding bushing will not be damaged by stress at the connection point between the grounding lead and the grounding bushing at the top of the transformer due to sudden events such as earthquakes, which could lead to transformer oil leakage and further failures. In the lower part of the transformer, the use of flexible connection also solves the problem of local stress concentration caused by tolerance accumulation when the grounding lead is rigidly connected to the grounding grid. At the same time, it is also beneficial for the online monitoring system to monitor the grounding lead current in real time.

[0027] In an optional embodiment, such as Figure 4 As shown, the flexible connector lead 4 includes an outer tube and an inner spiral wire body. The outer tube is also made of copper wire wound together. This structure can prevent the adverse effects caused by the reserved section being too loose.

[0028] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0031] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0032] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0033] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A transformer grounding flexible lead system for reducing stress, characterized in that, The system includes a grounding bushing (1) and a grounding copper busbar (3) installed on the top of the transformer. A flexible connecting piece (2) is connected between the grounding bushing (1) and the grounding copper busbar (3). A flexible connecting lead (4) is connected between the grounding copper busbar (3) located at the bottom of the transformer and the grounding grid.

2. The transformer grounding flexible lead system for reducing stress according to claim 1, characterized in that: The surface of the flexible connector (2) is provided with at least one set of arched protrusions.

3. A transformer grounding flexible lead system for reducing stress according to claim 2, characterized in that: The flexible connector (2) has fixing points on both sides of its arched protrusion.

4. A transformer grounding flexible lead system for reducing stress according to claim 1, characterized in that: The flexible connector lead (4) is a soft copper stranded wire.

5. A transformer grounding flexible lead system for reducing stress according to claim 1, characterized in that: The flexible connector lead (4) is provided with a reserved section.

6. A stress-reducing transformer grounding flexible lead system according to claim 1, characterized in that: The flexible connector lead (4) includes an outer tube and an inner spiral body.

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