A cable accessory plug-in anti-extraction fixing device

Abstract

The utility model provides a kind of cable accessory plug-in anti-disengagement fixing device, belong to cable technical field, it is characterized in that, including first top support component, second top support component, first bottom support component, second bottom support component, insulating stress cone and bolt, the first top support component and the second top support component are fixed in the upper portion of the first bottom support component and second bottom support component by bolt, the first top support component and second top support component are located above insulating stress cone and close to insulating stress cone, the device can solve the problem of high-voltage cable plug-in GIS terminal in installation process and normal operation after installation, appear downward displacement disengagement.

Description

Technical Field

[0001] This utility model belongs to the field of cable technology, and specifically relates to a cable accessory insertion and removal anti-detachment fixing device. Background Technology

[0002] Gas-insulated metal-enclosed switchgear (GIS) has become a core component of modern urban power grids, especially in 220kV and above voltage transmission systems, due to its compact structure, high operational reliability, and strong environmental adaptability. The electrical connection between GIS and high-voltage power cables is typically achieved through pluggable cable terminals (commonly referred to as GIS terminals or pluggable interfaces). This connection interface is one of the most critical weak points in the entire transmission line; its mechanical reliability and electrical stability directly affect the safe operation of the power grid.

[0003] Currently, GIS plug-in interfaces at the 220kV voltage level both domestically and internationally generally adopt a flange bolt connection for fixing. The basic structure is as follows: the conductor of the cable terminal is inserted into the socket of the GIS equipment, and then secured to the corresponding flange on the GIS housing using multiple high-strength bolts via an outer flange, thus achieving mechanical connection, electrical conduction, and gas sealing. However, due to the lack of a rigid connection at the top, the system is prone to vibration during operation, causing the cable and sheath to slide downwards. This leads to deviations in installation dimensions from design requirements, resulting in misalignment of the cable core and stress cone, and ultimately, operational failures. Summary of the Invention

[0004] In view of this, the present invention provides a cable accessory plug-in anti-detachment fixing device to solve the problem of downward displacement and detachment of high-voltage cable plug-in GIS terminals during installation and normal operation after installation.

[0005] This utility model is implemented as follows: This utility model provides a cable accessory insertion and removal anti-detachment fixing device, which includes a first top support assembly, a second top support assembly, a first bottom support assembly, a second bottom support assembly, an insulating stress cone, and bolts. The first top support assembly and the second top support assembly are fixed to the upper part of the first bottom support assembly and the second bottom support assembly by bolts. The first top support assembly and the second top support assembly are located above the insulating stress cone and are in close contact with the insulating stress cone.

[0006] The technical advantages of the cable accessory plug-in / plug-out anti-loosening fixing device provided by this utility model are as follows: Based on the above technical solution, the cable accessory plug-in / plug-out anti-loosening fixing device of this utility model can be further improved as follows: Furthermore, a protrusion is provided on the lower part of the inner wall of the first base assembly, and a groove is provided on the lower cross section of the inner wall of the second base assembly, wherein the protrusion and the groove are adapted to each other.

[0007] The beneficial effect of adopting the above-mentioned further solution is that it facilitates the stability of the connection between the first base assembly and the second base assembly.

[0008] Furthermore, the first base assembly and the second base assembly are provided with inclined surfaces inside, and the inclined surfaces have an inclination angle of 135°.

[0009] The advantage of adopting the above-mentioned further solution is that it facilitates the placement of an elastic insulating stress cone.

[0010] Furthermore, the insulating stress cone is made of silicone rubber.

[0011] The beneficial effects of adopting the above-mentioned further solution are as follows: when axial pressure is applied to the insulating stress cone, controllable elastic deformation can be generated, causing the insulating stress cone to contract radially, thereby gripping the internal cable. With the help of the high friction coefficient of the silicone rubber material surface of the insulating stress cone, a stable static friction state is formed at the interface, effectively suppressing relative sliding.

[0012] Furthermore, the first top support assembly and the second top support assembly each have two threaded mounting holes, and the first bottom support assembly and the second bottom support assembly each have two threaded mounting holes.

[0013] The beneficial effect of adopting the above-mentioned further solution is that it facilitates the fixing of the first top support assembly and the second top support assembly onto the first bottom support assembly and the second bottom support assembly.

[0014] Furthermore, two threaded mounting holes are respectively provided on the side of the first top support assembly and the second top support assembly, and four threaded holes are respectively provided on the side of the first bottom support assembly and the second bottom support assembly.

[0015] The beneficial effects of adopting the above-mentioned further solution are: it facilitates the fixing of the first top support assembly and the second top support assembly, and at the same time facilitates the fixing of the first bottom support assembly and the second bottom support assembly.

[0016] Compared with existing technologies, the beneficial effects of the cable accessory insertion and removal anti-disengagement fixing device provided by this utility model are as follows: This mechanism significantly improves the reliability of cable accessories during operation, enabling them to effectively resist displacement and relaxation caused by short-circuit electrodynamics, mechanical vibration, and long-term thermal cycling stress. Therefore, it completely prevents the downward slippage of the cable and sheath, ensuring that the installation structure always meets the original design dimensions, preventing misalignment between the cable core and stress cone, and thus eliminating operational failures caused by such mechanical mismatches. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This utility model provides an overall schematic diagram of a cable accessory insertion and removal anti-detachment fixing device; Figure 2 This utility model provides a schematic diagram of the first top support assembly of a cable accessory insertion / removal anti-detachment fixing device; Figure 3 This utility model provides a schematic diagram of the second top support assembly of a cable accessory insertion / removal anti-detachment fixing device; Figure 4 This utility model provides a schematic diagram of the first base assembly of a cable accessory insertion and removal anti-detachment fixing device; Figure 5 This utility model provides a schematic diagram of the second base assembly of a cable accessory insertion and removal anti-detachment fixing device; Figure 6 This utility model provides a cross-sectional schematic diagram of a cable accessory insertion and removal anti-detachment fixing device; The attached diagram lists the components represented by each number as follows: 10. First top support assembly; 20. Second top support assembly; 30. First bottom support assembly; 31. Protrusion; 40. Second bottom support assembly; 41. Groove. Detailed Implementation

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

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, 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 technical features indicated. Thus, 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.

[0024] like Figure 1-6 As shown, this utility model provides a cable accessory insertion and removal anti-detachment fixing device, which includes a first top support assembly 10, a second top support assembly 20, a first bottom support assembly 30, a second bottom support assembly 40, an insulating stress cone, and bolts. The first top support assembly 10 and the second top support assembly 20 are fixed to the upper part of the first bottom support assembly 30 and the second bottom support assembly 40 by bolts. The first top support assembly 10 and the second top support assembly 20 are located above the insulating stress cone and closely attached to the insulating stress cone. The cross-section of the first top support assembly 10 and the second top support assembly 20 is arranged in an inverted L shape.

[0025] A protrusion 31 is provided on the lower part of the inner wall of the first base assembly 30, and a groove 41 is provided on the lower part of the inner wall of the second base assembly 40, with the protrusion 31 and the groove 41 being adapted to each other.

[0026] The first base support assembly 30 and the second base support assembly 40 have inclined surfaces inside, with an inclination angle of 135°.

[0027] The insulating stress cone is made of silicone rubber.

[0028] The first top support assembly 10 and the second top support assembly 20 each have two threaded mounting holes, and the first bottom support assembly 30 and the second bottom support assembly 40 each have two threaded mounting holes.

[0029] Two threaded mounting holes are respectively opened on the side of the first top support assembly 10 and the second top support assembly 20, and four threaded holes are respectively opened on the side of the first bottom support assembly 30 and the second bottom support assembly 40. The uniform diameter of the threaded holes is M6*25.

[0030] In use, the first top support assembly 10 and the second top support assembly 20 are placed outside the cable, and the insulating stress cone is placed between the first bottom support assembly 30 and the second bottom support assembly 40. The first top support assembly 10 and the second top support assembly 20 are fixed to the first bottom support assembly 30 and the second bottom support assembly 40 with bolts. At the same time, the first top support assembly 10 and the second top support assembly 20 are fixed with bolts, and the first bottom support assembly 30 and the second bottom support assembly 40 are fixed for assembly. The lower part of the first top support assembly 10 is in contact with the upper part of the insulating stress cone and is currently in a stationary state. During operation, the first top support assembly 10 and the second top support assembly 20 apply axial pressure to the insulating stress cone below, causing the insulating stress cone to deform. The insulating stress cone radially contracts and hugs the inner cable core. The friction force on the surface of the insulating stress cone effectively inhibits relative slippage, thereby preventing misalignment between the cable core and the stress cone.

[0031] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cable accessory insertion / removal anti-detachment fixing device, characterized in that, It includes a first top support assembly (10), a second top support assembly (20), a first bottom support assembly (30), a second bottom support assembly (40), an insulating stress cone, and bolts. The first top support assembly (10) and the second top support assembly (20) are fixed to the upper part of the first bottom support assembly (30) and the second bottom support assembly (40) by bolts. The first top support assembly (10) and the second top support assembly (20) are located above the insulating stress cone and are in close contact with the insulating stress cone.

2. The cable accessory insertion / removal anti-detachment fixing device according to claim 1, characterized in that, A protrusion (31) is provided on the lower part of the inner wall of the first base assembly (30), and a groove (41) is provided on the lower part of the inner wall of the second base assembly (40). The protrusion (31) and the groove (41) are adapted to each other.

3. The cable accessory insertion / removal anti-detachment fixing device according to claim 1, characterized in that, The first base assembly (30) and the second base assembly (40) are provided with inclined surfaces inside, and the inclined surfaces have an inclination angle of 135°.

4. The cable accessory insertion / removal anti-detachment fixing device according to claim 1, characterized in that, The insulating stress cone is made of silicone rubber.

5. The cable accessory insertion / removal anti-detachment fixing device according to claim 1, characterized in that, The first top support assembly (10) and the second top support assembly (20) each have two threaded mounting holes, and the first bottom support assembly (30) and the second bottom support assembly (40) each have two threaded mounting holes.

6. The cable accessory insertion / removal anti-detachment fixing device according to claim 1, characterized in that, Two threaded mounting holes are respectively provided on the side of the first top support assembly (10) and the second top support assembly (20), and four threaded holes are respectively provided on the side of the first bottom support assembly (30) and the second bottom support assembly (40).

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