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Composite hollow insulator core-rod and making method

A technology for insulators and mandrels, applied in the field of composite hollow insulator mandrels and its preparation, can solve the problems of large size and weight, simplicity, etc., achieve excellent electrical performance, take into account economy, and ensure the effect of mechanical performance requirements

Inactive Publication Date: 2007-03-28
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The structure of the commonly used hollow FRP mandrel is a winding tube, which is too simple for large-scale composite hollow insulators, resulting in excessive volume and weight

Method used

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  • Composite hollow insulator core-rod and making method

Examples

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preparation example Construction

[0017] The preparation method of the present invention will be further described below in conjunction with specific examples and accompanying drawings, but the present invention is not limited.

[0018] Firstly, according to the load level of the insulator, the size and shape of the mandrel are calculated and determined. The cross-section is shown in Figure 1. The production process is as follows: First, a certain number of composite material profiles 2 are produced for use, then the glass fiber reinforced resin matrix composite material tube 3 is wound or rolled, and then the composite material profiles 2 are installed. The gaps between the profiles are made of glass fiber and resin The composite material filler 4 composed of the mixture is filled, and finally the glass fiber reinforced resin matrix composite material pipe 1 is wound or cloth rolled. Among them, the composite material profile 2 has various forms, including fan-shaped, trapezoidal, circular, triangular, I-shap...

Embodiment 1

[0019] Example 1: The use requirements of 1000KV outdoor rod insulators are as follows: the length is 12m, the bending moment to the root is 200KN·m, and the torque is 10KN·m. The mandrel is made of glass fiber reinforced epoxy resin composite material, and the outer diameter is designed to be 600mm after calculation.

[0020] The intermediate profile (composite profile 2) adopts a hollow fan-shaped structure and is pultruded. The size is shown in Figure 2, a total of 32, each of which is bonded with epoxy resin. The longitudinal section of the entire mandrel is shown in Figure 3. After testing, the mandrel meets the mechanical and electrical performance requirements.

Embodiment 2

[0021] Example 2: The requirements for use of a 500KV outdoor rod insulator are as follows: the length is 8m, the bending moment to the root is 100KN·m, and the torque is 5KN·m. The mandrel is made of glass fiber reinforced epoxy resin composite material, and the outer diameter is designed to be 350mm after calculation, and the intermediate profile (composite material profile 2) is a round tube, a total of 14 pieces. The dimensions of each part are shown in Table 2.

[0022] The gaps between the intermediate profiles are filled with a composite filler 4 consisting of a glass fiber and epoxy resin mixture. The longitudinal section of the entire mandrel is shown in Figure 4. After testing, the mandrel meets the mechanical and electrical performance requirements.

[0023] schedule

[0024] Table 1 Tube 1, 3 size

[0025] Outer diameter / mm

Wall thickness / mm

Outer tube 1

inner tube 3

600

380

15

10

[0026] Table 2 Dimens...

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Abstract

Core rod of compound hollow insulator is composed of composite tube 1, composite tube 3, and some shape bars 2 in composite material arranged in circumference between tube 1, and tube 3. Filler 4 in composite material is filled in interspaces among shape bars. Fillers 4 are made from rosin based composite material through pultrude combined circumferential wrapping, laying down or rolling techniques. Shape bars 2 are prepared through continuous fiber pultrude, or pull wrapping or hand pasting. Composite tube 1 and composite tube 3 are prepared through wrapping fiber yarn or rolling glass fiber cloth, or combining both manners. Features are: reasonable structure, excellent electric specification, reduced weight of core rod of compound hollow insulator, and ensuring requirement of mechanical properties so as to put materials to good use.

Description

technical field [0001] The invention relates to a composite hollow insulator core rod and a preparation method thereof. Background technique [0002] The composite insulator is composed of three parts: mandrel, shed and metal connector. The mandrel is made of high-strength composite material, which is both a load-bearing part and an inner insulating part. Composite insulator core rods are usually composed of glass fiber and epoxy resin, and can be divided into solid and hollow. Hollow FRP core rods are generally formed by winding method. my country has devoted itself to the research of composite insulators since the 1970s. It was first used in the early 1990s. As of 1998, more than 430,000 line composite insulators of various grades have been used in the power grids of 30 provinces, municipalities and autonomous regions in China. , The manufacturer has grown to more than 30, but mainly line insulators, and the development and production of large-scale high-voltage composite...

Claims

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Application Information

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IPC IPC(8): H01B17/04H01B17/38H01B19/00
Inventor 王钧蔡浩鹏杨小利段华军徐任信王翔
Owner WUHAN UNIV OF TECH
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