Composite porcelain insulator string

Abstract

The invention discloses a composite porcelain insulator string, and belongs to the technical field of power equipment. The insulator string is mainly formed by compounding an end hardware fitting, a core rod and a porcelain piece sleeved on the core rod. The core is that the fittings are crimped at two ends of the core rod for connection; the core rod is used as a bearing and internal insulation main body; the porcelain piece is provided with the hollow pipe and the umbrella skirts, and the porcelain piece and the core rod are glued into a whole through the insulation paste, so that the creepage distance is effectively increased, the core rod is protected from environmental erosion, and aging and brittle failure of the core rod are prevented. The composite insulator combines the advantages of good mechanical stability of a porcelain insulator and strong bearing capacity of a composite insulator, has excellent electromechanical performance and long-term operation reliability, and is particularly suitable for an ultra-high voltage transmission line.

Description

Technical Field

[0001] This invention relates to the field of power transmission and distribution equipment technology, specifically a composite porcelain insulator string for overhead transmission lines. Background Technology

[0002] Insulators are crucial components in overhead transmission lines, supporting conductors and preventing current from returning to the ground. Traditional porcelain insulators are heavy and prone to flashover accidents in polluted areas; while ordinary composite insulators are lightweight and have good pollution resistance, their core rods are susceptible to brittle fracture, and their mechanical strength reliability limits their application in tension strings. Porcelain composite insulators combine the advantages of stable mechanical properties of porcelain materials and the good water-repellent properties of composite insulators, but there is still room for improvement in the existing structure regarding core rod protection, anti-aging, and modular replacement. Summary of the Invention

[0003] The purpose of this invention is to provide a composite porcelain insulator string that has a reasonable structure, high mechanical strength, aging resistance, and is easy to maintain.

[0004] This invention is achieved using the following technical solution: A composite porcelain insulator string is assembled from hardware, porcelain components, and a core rod. Its technical features are as follows: the hardware is located at both ends of the insulator string and fixed to the core rod via a crimping process, used to connect the tower and the power line; the core rod is located on the central axis of the insulator string, made of epoxy fiberglass rod, bearing mechanical loads and providing internal insulation; the porcelain components have a hollow tube and shed structure, with one or more porcelain components fitted onto the core rod and bonded together with insulating adhesive to increase creepage distance and protect the core rod from atmospheric corrosion. Beneficial effects

[0005] 1. By combining the three major materials, the advantages of each material are combined to compensate for their shortcomings. The structure is simple, easy to manufacture, low in cost, and high in performance, offering the best cost-effectiveness. 2. It will not be punctured during use, has low maintenance costs, and a long service life; 3. Compared with existing porcelain insulators, there are no longer specific requirements for the electromechanical performance of porcelain components. Production and assembly are simple, the weight is light, the creepage distance is large, the tonnage is high, and zero value will not occur, which can reduce or eliminate maintenance. 4. Compared with existing composite insulators, it has better anti-aging properties, higher compressive, bending and torsional strength, can prevent core rod brittle fracture, and has a long service life. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the overall structure of the composite porcelain insulator string of the present invention.

[0007] In the diagram: 1. End fitting, 2. Core rod, 3. Ceramic component, 31. Hollow tube, 32. Umbrella skirt, 4. Insulating adhesive. Detailed Implementation

[0008] The present invention will now be described in further detail with reference to the accompanying drawings.

[0009] As attached Figure 1 As shown, the composite porcelain insulator string of the present invention has fittings 1 at both ends preferably made of hot-dip galvanized carbon steel, which are crimped onto the core rod 2 by a large crimping machine to ensure effective transmission of mechanical stress. The core rod 2 is preferably made of high-strength epoxy glass fiber pulverized rod, which has high tensile strength and provides the main mechanical support. The porcelain components 3 are made of high-strength electrical ceramics, and their number can be connected in series according to the voltage level requirements to adjust the creepage distance. Each porcelain component 3 includes a hollow tube 31 and a skirt 32.

[0010] During assembly, first, apply insulating adhesive 4 (e.g., high-strength silicone rubber adhesive or epoxy resin insulating adhesive) evenly to the surface of the core rod 2 and the inner wall of the hollow tube 31 of the ceramic part 3. Then, fit the ceramic part 3 onto the core rod 2, ensuring its accurate positioning. After the insulating adhesive 4 cures, the ceramic part 3 and the core rod 2 are bonded together as a solid whole.

[0011] In a preferred embodiment, to further enhance the anti-flashover capability, a silicone rubber composite jacket can be applied to the surface of the umbrella skirt 32 of the ceramic component 3. The bonding interface treatment between the mandrel 2 and the ceramic component 3 is also crucial; the surface of the mandrel 2 can be roughened or coated with a coupling agent to enhance the bonding strength.

Claims

1. A composite porcelain insulator string, characterized by The utility model relates to a kind of insulator strings, including: fittings (1) located at the both ends of insulator string, it is fixedly connected by pressure bonding mode;Core rod (2) located at the central axis position of insulator string, for providing the mechanical strength and internal insulation performance required by insulator string;And one to several porcelain pieces (3), the porcelain piece (3) has hollow tube (31) and umbrella skirt (32), the porcelain piece (3) is sleeved on the core rod (2), and is cemented with the core rod (2) by insulating glue (4) and is integrated, to increase the creepage distance and protect the core rod (2). The core rod (2) is an epoxy glass fiber rod.

2. A composite porcelain insulator string according to claim 1, characterized in that The insulating glue (4) is a silicone rubber adhesive or an epoxy resin insulating glue.

3. A composite porcelain insulator string according to claim 1, wherein The umbrella skirt (32) surface of the porcelain piece (3) is coated with a silicone rubber composite jacket.

4. A composite porcelain insulator string according to claim 1, wherein The outer surface of the fitting (1) is plated with a hot-dipped zinc layer.

5. A composite porcelain insulator string according to claim 1, wherein ​

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