Transformer grounding flexible lead system capable of reducing stress

Abstract

The invention 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. The soft connecting sheet is a multi-layer soft copper strip; 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. 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] The present invention belongs to the technical field of transformer structures, and particularly relates to a transformer grounding flexible lead system for reducing stress. Background Art

[0002] In order to ensure the safe and reliable operation of power transformers, when the transformer vibrates due to sudden situations such as earthquakes, it is necessary to prevent stress from being generated at the connection position between the grounding lead and the grounding bushing at the top of the transformer, which may cause damage to the grounding bushing, resulting in oil leakage from the transformer. Moreover, in severe cases, water may enter the interior of the transformer, causing serious accidents. In addition, at the connection between the lower grounding lead of the transformer and the grounding grid, hard connection may cause local stress concentration due to reasons such as tolerance accumulation, which is likely to deform the grounding lead.

[0003] After researching the transformer structure and the grounding lead system, a transformer grounding flexible lead system for reducing stress is proposed, which can effectively avoid the stress concentration phenomenon of the above-mentioned grounding lead and protect the safety of the transformer grounding system. Summary of the Invention

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

[0005] The present invention achieves the above purpose through the following technical solutions:

[0006] A transformer grounding flexible lead system for reducing stress, the system includes a grounding bushing and a grounding copper bar arranged at the top of the transformer, a soft connection piece is connected between the grounding bushing and the grounding copper bar, and a soft connection lead is connected between the grounding copper bar at the lower part of the transformer and the grounding grid.

[0007] As a further optimized solution of the present invention, the soft connection piece is a multi-layer soft copper strip.

[0008] As a further optimized solution of the present invention, at least one set of arched protrusions is arranged on the surface of the soft connection piece.

[0009] As a further optimized solution of the present invention, fixing points are arranged on both sides of the arched protrusion of the soft connection piece.

[0010] As a further optimized solution of the present invention, the soft connection lead is a soft copper stranded wire.

[0011] As a further optimized solution of the present invention, the soft connection lead is provided with a reserved section.

[0012] As a further optimized solution of the present invention, the soft connection lead includes an outer pipe fitting and an inner spiral wire body.

[0013] The beneficial effects of the present invention are as follows: The present invention can ensure that when the grounding bushing of the transformer does not cause vibration of the transformer due to sudden situations such as earthquakes, stress is generated at the connection position between the grounding lead and the grounding bushing at the top of the transformer, causing damage to the grounding bushing, thereby resulting in the possibility of transformer oil leakage and further failures; at the lower part of the transformer, the use of flexible connection also solves the phenomenon of local stress concentration caused by the accumulation of tolerances during the hard connection between the grounding lead and the ground grid, and at the same time is conducive to the on-line monitoring system to monitor the current of the grounding lead in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 is a schematic diagram of the structure of the flexible connection piece of the present invention;

[0016] Figure 3 is a schematic diagram of the structure of the flexible connection lead of the present invention;

[0017] Figure 4 is another schematic diagram of the structure of the flexible connection lead of the present invention.

[0018] In the figure: 1, grounding bushing; 2, flexible connection piece; 3, grounding copper bar; 4, flexible connection lead. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following further describes the present application in detail with reference to the accompanying drawings. It is necessary to point out here that the following specific embodiments are only used to further illustrate the present application and cannot be construed as limiting the protection scope 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] Reference Figures 1 to 3 Shown in the structure, a flexible grounding lead system for a transformer to reduce stress, the system includes a grounding bushing 1 and a grounding copper bar 3 arranged at the top of the transformer, a flexible connection piece 2 is connected between the grounding bushing 1 and the grounding copper bar 3, and a flexible connection lead 4 is connected between the grounding copper bar 3 at the lower part of the transformer and the ground grid.

[0021] It should be noted that the flexible connection piece 2 and the flexible lead are conducive to the on-line monitoring system to monitor the current of the grounding lead in real time. This system has a simple structure, is easy to manufacture, and has strong practicability.

[0022] Furthermore, it should be noted that the flexible connection piece 2 is a multi-layer flexible copper strip; the multi-layer flexible copper strips are stacked together and can have a certain amount of deformation, so as to achieve the purpose of flexible connection.

[0023] Further, it should be noted that at least one set of arched protrusions is provided on the surface of the flexible connecting piece 2. At least one set is provided to endow it with better deformation ability.

[0024] Further, it should be noted that fixing points are provided on both sides of the arched protrusion of the flexible connecting piece 2. By providing the fixing points, the arching can be made more orderly, enabling it to function when needed without causing a great impact on the surrounding environment.

[0025] Further, it should be noted that the flexible connecting lead 4 is a flexible copper stranded wire. The flexible connecting lead 4 is provided with a reserved section. An on-line grounding lead cable monitoring system can also be arranged at this section of the flexible copper stranded wire, which is beneficial to monitoring the grounding current.

[0026] This application can ensure that when the transformer grounding bushing is not damaged due to stress at the connection position between the grounding lead and the transformer top grounding bushing caused by the vibration of the transformer due to sudden situations such as earthquakes, thus preventing the possibility of transformer oil leakage and further failures; at the lower part of the transformer, the use of flexible connection also solves the phenomenon of local stress concentration caused by tolerance accumulation when the grounding lead is rigidly connected to the ground grid, and at the same time is beneficial to the on-line monitoring system for real-time monitoring of the grounding lead current.

[0027] In an alternative embodiment, as Figure 4 shown, the flexible connecting lead 4 includes an outer pipe fitting and an inner spiral wire body, wherein the outer pipe fitting is also formed by winding copper wires. This structure can prevent the adverse effects caused by the excessive looseness of the reserved section.

[0028] In the description of the present invention, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0029] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected with", "fixed" and other terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0030] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0031] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

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

[0033] The above-described embodiments merely represent several implementation manners of the present invention. Their descriptions are relatively specific and detailed, but should not be construed as limiting the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several variations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A transformer grounding flexible lead system for reducing stress, characterized in that: The system comprises a grounding sleeve (1) and a grounding copper bar (3) arranged on the top of the transformer, a soft connection sheet (2) being connected between the grounding sleeve (1) and the grounding copper bar (3), and a soft connection lead (4) being connected between the grounding copper bar (3) and the grounding grid located at the bottom of the transformer; the soft connection sheet (2) is a multi-layer soft copper strip.

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

3. A transformer grounding flexible lead system for reducing stress according to claim 2, characterized in that: Fixed points are arranged on both sides of the arched protrusion of the flexible connecting piece (2).

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

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

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

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