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Hard composite insulator and preparation method thereof

A composite insulator and hard technology, applied in the field of electrical insulation equipment, can solve the problems of surface hydrophobicity, physical and mechanical properties, electrical performance attenuation, reduced creepage distance, inability to detect, etc., to improve the ability to resist bird peck damage, prevent The effect of brittle fracture accident and easy construction and maintenance

Active Publication Date: 2019-05-28
河北荣森电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the sheath materials of composite insulators are mainly silicone rubber, EPDM rubber or fluororubber, but this kind of sheath material has many disadvantages: on the one hand, it is not enough to prevent bird pecking from damaging the composite insulator, and the composite insulator in the line The shed and sheath of the insulator are damaged by bird pecking, which reduces the creepage distance and exposes the inner insulating mandrel to the outdoor operating environment; Under the long-term action of salt spray and other factors, aging will gradually occur, while the surface hydrophobicity, physical and mechanical properties and electrical properties of silicone rubber composite insulators will attenuate due to aging, which will lead to pollution flashover accidents in severe cases
In addition, the internal insulating mandrels of existing composite insulators are basically made of glass fiber reinforced epoxy rods. Because of their poor weather resistance, they cannot be exposed to the atmospheric environment. According to incomplete statistics, there have been many domestic insulator brittle fracture accidents. Composite insulators with brittle fracture accidents generally have damaged sheaths and end seals
It is generally believed that the probability of brittle fracture is very small, it cannot be prevented, it cannot be detected, and it is extremely harmful to the line
[0003] Composite insulators operate in a wide geographical range, and different regions have their own geographical particularities, resulting in complex operating conditions, such as: wind and sand erosion, and at the same time, there are external uncertain external factors in the process of transportation, installation and maintenance of composite insulators that cause damage to the insulator sheath , thus affecting the product quality of composite insulators

Method used

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  • Hard composite insulator and preparation method thereof
  • Hard composite insulator and preparation method thereof
  • Hard composite insulator and preparation method thereof

Examples

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preparation example Construction

[0051] The preparation method of the modified silicone rubber is obtained by injecting raw materials into a mold and plasticizing at a certain temperature and pressure.

[0052] Furthermore, on the premise of not affecting the properties of the modified silicone rubber, compatibilizers, reinforcing agents, and vulcanizing agents can be added during the preparation of the modified silicone rubber to improve the performance of the modified silicone rubber.

[0053] Examples of the compatibilizer include vinyltriethoxysilane, silicone oil and the like.

[0054] As examples of the reinforcing agent, silica, carbon black, white carbon black and the like can be cited.

[0055] Examples of vulcanizing agents include, but are not limited to, sulfur-based vulcanizing agents, peroxide vulcanizing agents, and the like.

[0056] plastic

[0057] The plastic is not particularly limited.

[0058] Examples of plastics include, but are not limited to, acrylonitrile-butadiene-styrene (ABS),...

Embodiment approach

[0100] As a preferred embodiment, the alumina is α-alumina and / or γ-alumina.

[0101] The α-alumina belongs to the trigonal crystal system, the coordination numbers of the positive and negative ions are 6 and 4 respectively, and the oxygen ions in the structure form a close-packed hexagonal packing, forming multiple octahedral shapes, and the aluminum ions randomly exist in each octahedron. In the voids of the octahedron, since the ratio of aluminum atoms to oxygen atoms is 2:3, aluminum ions cannot fill all the voids of the oxygen ion octahedron, and only fill two-thirds.

[0102] Preferably, the particle size of the α-alumina is 200-500 nm.

[0103] The γ-alumina crystal structure belongs to the defective spinel crystal structure, which has a tetragonal face-centered cubic structure. The 32 cubic oxygen atoms will form 24 gaps, and some aluminum atoms are irregularly distributed in the 24 The unfilled voids will cause the crystal structure of γ-alumina to change.

[0104] ...

Embodiment 1

[0157] Such as figure 1 As shown, a rigid composite insulator includes an insulating mandrel 1, fittings 2, a hard sheath 3, and a hard shed 4. The fittings 2 are arranged at both ends of the insulating mandrel 1; the hard sheath 3 covers the outer surface of the insulating mandrel 1 and extends to the surface of the fitting 2 to form a seal; the hard shed 4 is arranged on the On hard sheath 3;

[0158] The hard umbrella skirt includes more than one large umbrella-shaped protrusions 41 arranged coaxially with the insulating mandrel, and the diameters of the large umbrella-shaped protrusions 41 are the same;

[0159] A small umbrella-shaped protrusion 43 , a middle umbrella-shaped protrusion 42 , and a small umbrella-shaped protrusion 43 are sequentially arranged between the adjacent large umbrella-shaped protrusions 41 .

[0160] Wherein, the preparation raw materials of the hard shed and the hard sheath are the same, and in parts by weight, they all include 40 parts of poly...

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Abstract

The invention belongs to the technical field of power insulation equipment, and particularly relates to a hard composite insulator and a preparation method thereof. The hard composite insulator comprises an insulating core rod, hardware fittings, a hard sheath and a hard umbrella skirt. The hardware fittings are arranged at the two ends of the insulating core rod; the hard sheath covers the outersurface of the insulating core rod and extends to the surface of the fitting to form sealing. The hard umbrella skirt is arranged on the hard sheath. The hard umbrella skirt comprises more than one large umbrella-shaped bulge which is coaxially arranged with the insulating core rod. The preparation raw materials of the hard umbrella skirt and the hard sheath are the same, and at least comprise silicone rubber and / or plastic. According to the composite insulator, the bird pecking damage resistance, the sand wind resistance, the external force damage resistance and the aging resistance of the composite insulator are improved, the probability that the insulating core rod is exposed in the atmospheric environment is further reduced, the insulating core rod cannot be brittle failure due to external corrosion, and brittle failure accidents can be prevented in the using process of the composite insulator.

Description

technical field [0001] The invention belongs to the technical field of electric insulation equipment, and in particular relates to a hard composite insulator and a preparation method thereof. Background technique [0002] Composite insulators are favored by the industry because of their great advantages over insulating insulators in terms of weight and pollution flashover voltage, especially the high pollution flashover voltage. At present, the sheath materials of composite insulators are mainly silicone rubber, EPDM rubber or fluororubber, but this kind of sheath material has many disadvantages: on the one hand, it is not enough to prevent bird pecking from damaging the composite insulator, and the composite insulator in the line The shed and sheath of the insulator are damaged by bird pecking, which reduces the creepage distance and exposes the inner insulating mandrel to the outdoor operating environment; Under the long-term effects of salt spray and other factors, aging...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B17/32H01B17/38H01B19/00B29C45/14
Inventor 及荣军
Owner 河北荣森电气有限公司
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