High-voltage integrated solid sleeve and GN30 isolating switch

Abstract

A high-voltage integrated solid sleeve comprises a rotating center shaft, three insulating solid cylinders are arranged on the rotating center shaft side by side, the three insulating solid cylinders are arranged side by side at intervals, an isolation knife is arranged in each insulating solid cylinder in a penetrating mode, and the isolation knives are arranged in the axis direction of the insulating solid cylinders; in conclusion, the integrated structural design is adopted, the components are all made of the epoxy resin material, and the epoxy resin has good electrical insulation performance, mechanical strength and chemical stability, so that the heat resistance and fire resistance of the sleeve can be enhanced through selection of the material, and partial discharge and noise cannot be generated; compared with the prior art, the high-voltage integrated solid sleeve has the advantages that the voltage resistance is obviously improved, the high-voltage integrated solid sleeve can bear voltage of 40,000 volts (12KV), and noise is not generated in the operation process, so that the high-voltage integrated solid sleeve is more suitable for the requirements of a modern electric power system.

Description

Technical Field

[0001] The utility model belongs to the technical field of disconnectors, and in particular relates to a high-voltage integrated solid bushing and a GN30 disconnector. Background Art

[0002] Disconnectors are a common electrical device used extensively in 10kV distribution systems. Their operational safety and ease are crucial to grid operation. Their primary function is to ensure that air gaps meet safety distance requirements after disconnection, ensuring the safety of maintenance personnel and equipment.

[0003] The GN30 rotary indoor high-voltage disconnector (GN30 disconnector) is suitable for use in indoor power systems rated at 12 kV AC, 50 Hz and below. It is used to open and close circuits under voltage and no-load conditions. It can be used in conjunction with high-voltage switchgear or standalone. The GN30 disconnector features two sets of insulators and contacts fixed to the upper and lower surfaces of a three-phase common chassis. The disconnector is opened and closed by rotating the contact blades. However, the casings on most GN30 disconnectors are currently hollow ceramic. Due to material limitations, this produces significant noise when the withstand voltage reaches 8kV-1W. Utility Model Content

[0004] The utility model aims to provide a high-voltage integrated solid bushing and a GN30 disconnector, which solve the technical problems of the existing GN30 disconnector having low voltage resistance and generating huge noise.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A high-voltage integrated solid bushing comprises a rotating central axis, on which three insulating solid cylinders are arranged side by side, the three insulating solid cylinders being arranged side by side and spaced apart, each insulating solid cylinder being penetrated by an isolating knife, the isolating knife being arranged along the axis of the insulating solid cylinder, the two ends of the isolating knife extending out of the two ends of the insulating solid cylinder, and both ends of the isolating knife being provided with an electrical connection portion;

[0007] Both ends of the rotating central shaft are provided with connecting holes, and the side walls of the connecting holes are provided with fixing holes.

[0008] Furthermore, a plurality of flanges are provided at intervals on the surface of the rotating central axis between two adjacent insulating solid cylinders.

[0009] Furthermore, the rotating central shaft, the insulating solid cylinder and the flange are an integrated structure.

[0010] Furthermore, the rotating central shaft, the insulating solid cylinder and the flange are all made of epoxy resin material.

[0011] GN30 disconnector, including any one of the above-mentioned high-voltage integrated solid bushings.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention adopts a modular concept, dividing the bushing of the high-voltage disconnector into three independent insulating solid cylindrical units, which makes the installation and maintenance process more flexible. If a single unit fails, it can be replaced individually, reducing maintenance costs; the rotating central axis, insulating solid cylinder and flange adopt an integrated structural design, and these components are all made of epoxy resin material. Epoxy resin has good electrical insulation properties, mechanical strength and chemical stability. Therefore, the choice of this material can enhance the heat resistance and fire resistance of the bushing, and will not generate local discharge and noise; a flange is added between two adjacent insulating solid cylinders. Such a design can increase the creepage distance, thereby improving the insulation performance of the entire device, enabling it to operate at higher voltage levels without premature insulation failure.

[0013] The high-voltage, one-piece solid bushing of this utility model has significantly improved its pressure resistance and can withstand voltages up to 40,000 volts (12kV) without generating any noise during operation. This new design not only solves the noise problem of the original hollow ceramic bushing, but also improves the overall performance of the product through improvements in materials and technology, making it more suitable for the needs of modern power systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 This is a structural diagram of a high-voltage integrated solid bushing according to the utility model;

[0016] Figure 2 for Figure 1 Left view of . DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] The present invention is further described in detail below with reference to the embodiments.

[0019] like Figure 1 and Figure 2 As shown, a specific embodiment of a high-voltage integrated solid bushing provided by the utility model:

[0020] A high-voltage integrated solid bushing includes a rotating central axis 1, on which three insulating solid cylinders 2 are arranged side by side. The three insulating solid cylinders 2 are arranged side by side and at intervals. The insulating solid cylinders 2 and the rotating central axis 1 are arranged in a cross shape. Each insulating solid cylinder 2 of this structure serves as an independent unit and can be connected to each other for use, achieving modularization and standardization. It can be combined according to actual needs. If one of them fails or is damaged, it can be replaced separately, reducing maintenance costs.

[0021] An isolation knife is passed through each insulating solid cylinder 2, and the isolation knife is arranged along the axial direction of the insulating solid cylinder 2. The two ends of the isolation knife extend out of the two ends of the insulating solid cylinder 2, and both ends of the isolation knife are provided with electrical connection parts 3; both ends of the rotating central axis 1 are provided with connection holes 4, and the side walls of the connection holes 4 are provided with fixing holes 5.

[0022] Preferably, the rotating central axis 1, the insulating solid cylinder 2 and the flange of this embodiment are an integrated structure. The rotating central axis 1, the insulating solid cylinder 2 and the flange are all made of epoxy resin material. The high-voltage integrated solid sleeve made of epoxy resin material has the advantages of high temperature resistance, flame retardancy, no partial discharge, no noise, long service life and durability, and the voltage resistance can reach 4W and no noise.

[0023] A plurality of flanges 6 are provided at intervals on the surface of the rotating central axis 1 between two adjacent insulating solid cylinders 2, which can increase the creepage distance and improve the insulation performance.

[0024] It should be noted that, in this document, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0025] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-voltage integrated solid bushing, characterized by: The invention comprises a rotating central axis, on which three insulating solid cylinders are arranged side by side, the three insulating solid cylinders are arranged side by side and spaced apart, each insulating solid cylinder is penetrated by an isolating knife, the isolating knife is arranged along the axis direction of the insulating solid cylinder, the two ends of the isolating knife extend out of the two ends of the insulating solid cylinder, and both ends of the isolating knife are provided with an electrical connection portion; Both ends of the rotating central shaft are provided with connecting holes, and the side walls of the connecting holes are provided with fixing holes.

2. The high-voltage integrated solid bushing according to claim 1, characterized in that: A plurality of flanges are arranged at intervals on the surface of the rotating central axis between two adjacent insulating solid cylinders.

3. The high-voltage integrated solid bushing according to claim 2, characterized in that: The rotating central shaft, the insulating solid column and the flange are an integrated structure.

4. The high-voltage integrated solid bushing according to claim 3, characterized in that: The rotating central shaft, the insulating solid column and the flange are all made of epoxy resin material.

5. GN30 isolating switch, characterized by: It comprises any one of the high-voltage integrated solid bushings described in claims 1-4.

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