Silicon rubber-based non-linear cable accessory material and preparation method thereof

A cable accessory and nonlinear technology, which is applied in the field of silicone rubber-based nonlinear cable accessory materials and its preparation, can solve the problems of reducing the breakdown strength of cable accessory materials and affecting the overall performance of cable accessory materials, and achieve a stable DC breakdown electric field strength, reduce the probability of failure, and improve the effect of conductance nonlinearity

Inactive Publication Date: 2018-05-11
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, when preparing nonlinear cable accessory materials, the breakdown strength of the cable accessory material is often reduced while improving the conductance nonlinear performance of the cable accessory material, which affects the overall performance of the cable accessory material.

Method used

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  • Silicon rubber-based non-linear cable accessory material and preparation method thereof
  • Silicon rubber-based non-linear cable accessory material and preparation method thereof
  • Silicon rubber-based non-linear cable accessory material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of a silicone rubber-based nonlinear cable accessory material is as follows:

[0031] One, copper nitrate trihydrate in molar ratio: calcium nitrate tetrahydrate: n-tetrabutyl titanate=1:3:4, and according to the volume ratio of n-tetrabutyl titanate: n-tetrabutyl titanate: ethylene glycol Methyl ether: dilute nitric acid=100:400:1, measure 160ml ethylene glycol methyl ether, 0.4ml dilute nitric acid, 41ml n-tetrabutyl titanate respectively and take by weighing 21.744g copper nitrate trihydrate and 7.0845g calcium nitrate tetrahydrate respectively ;Pour ethylene glycol methyl ether and dilute nitric acid into the beaker in turn and stir evenly, add copper nitrate trihydrate to the above mixed solution and make it completely dissolve, then add calcium nitrate tetrahydrate to the mixed solution to make the calcium nitrate tetrahydrate completely Dissolve to obtain a clear mixed solution; cool the clear mixed solution to room temperature and add n-buty...

Embodiment 2

[0040] A preparation method of a silicone rubber-based nonlinear cable accessory material is as follows:

[0041] One, copper nitrate trihydrate in molar ratio: calcium nitrate tetrahydrate: n-tetrabutyl titanate=1:3:4, and according to the volume ratio of n-tetrabutyl titanate: n-tetrabutyl titanate: ethylene glycol Methyl ether: dilute nitric acid=100:400:1, measure 160ml ethylene glycol methyl ether, 0.4ml dilute nitric acid, 41ml n-tetrabutyl titanate respectively and take by weighing 21.744g copper nitrate trihydrate and 7.0845g calcium nitrate tetrahydrate respectively ;Pour ethylene glycol methyl ether and dilute nitric acid into the beaker in turn and stir evenly, add copper nitrate trihydrate to the above mixed solution and make it completely dissolve, then add calcium nitrate tetrahydrate to the mixed solution to make the calcium nitrate tetrahydrate completely Dissolve to obtain a clear mixed solution; cool the clear mixed solution to room temperature and add n-buty...

Embodiment 3

[0050] The difference between this example and Example 2 is that in Step 3, two parts of the crystallized copper calcium titanate particles with a mass of 22.2 g were accurately weighed and added to A and B two-component liquid silicone rubber respectively. In this method, the content of calcium copper titanate particles in the liquid-doped silicone rubber is 5 vol.%. In this embodiment, a finished silicone rubber-based nonlinear cable accessory material with a volume ratio of 5 vol.% of copper calcium titanate particles is finally obtained. .

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Abstract

The invention belongs to the field of direct-current cable accessory materials, and particularly relates to a silicon rubber-based non-linear cable accessory material and a preparation method thereof.The preparation method comprises the following steps: firstly, preparing copper calcium titanate particles in certain particle size through a sol-gel method and by carrying out high-temperature calcination and ball milling; secondly, dispersing the copper calcium titanate particles in double-component liquid silicon rubber through in-situ polymerization; finally, carrying out hot-pressing and vulcanization forming, thus preparing the silicon rubber-based non-linear cable accessory material. The silicon rubber-based non-linear cable accessory material prepared by the invention has excellent conductance nonlinearity and relatively stable direct-current breakdown electric field strength and is capable of effectively improving conductance gradient between different materials, increasing the transportation capability of a current carrier and weakening an accumulative effect of space charges in the position of an interface, so that removing of local electric field distortion can be realized, electric field distribution in a cable accessory can be homogenized, the accessory insulation performance can be enhanced, the failure occurrence probability can be reduced, and the service life ofthe cable accessory can be prolonged. The preparation method and needed equipment are simple, the cost is low, and implementation is easy.

Description

technical field [0001] The invention belongs to the field of DC cable accessory materials, and in particular relates to a silicone rubber-based nonlinear cable accessory material and a preparation method thereof. Background technique [0002] In recent years, due to the continuous acceleration of urbanization and modernization, the continuous increase of urban population, the demand for electricity has also increased day by day, and the traditional overhead transmission lines can no longer meet the process of modern urban planning. DC cables are widely used due to their large transmission power and low line loss. However, in DC cable lines, 70% of the faults occur in the cable accessories. The root of the stress cone in the cable accessories is composed of semiconductor stress cone material, reinforced insulation material and cable main insulation material. Due to the large difference in conductivity of the three materials, it is easy to form a conductivity gradient and in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08K3/24
CPCC08K3/24C08K2201/003C08K2201/011C08L83/04
Inventor 迟庆国李振张天栋陈庆国王暄赵洪
Owner HARBIN UNIV OF SCI & TECH
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