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Preparation method of ethylene propylene diene monomer based cable accessory material and ethylene propylene diene monomer based cable accessory material prepared by preparation method

A technology of EPDM rubber and cable accessories, applied in rubber insulators, organic insulators, etc., can solve the problems of restricting the rapid development of high-voltage DC cables, uneven distribution of electric field, breakdown failure of accessories, etc., and achieve stable DC breakdown electric field. Intensity, Improved Conductivity Gradient, Effect of Low Threshold Field Strength

Inactive Publication Date: 2018-06-29
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As an important part of the cable line, cable accessories, due to the difference in conductivity of different materials in the middle of the cable and at the terminal joints, lead to the accumulation of space charges, resulting in uneven distribution of the electric field of the accessories, which leads to breakdown failures of the accessories, which limits the high-voltage DC The rapid development of the cable industry

Method used

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  • Preparation method of ethylene propylene diene monomer based cable accessory material and ethylene propylene diene monomer based cable accessory material prepared by preparation method
  • Preparation method of ethylene propylene diene monomer based cable accessory material and ethylene propylene diene monomer based cable accessory material prepared by preparation method
  • Preparation method of ethylene propylene diene monomer based cable accessory material and ethylene propylene diene monomer based cable accessory material prepared by preparation method

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specific Embodiment approach 1

[0030] A preparation method of EPDM rubber-based cable accessory material, comprising the steps of:

[0031] Step 1. Weigh zinc oxide, boron nitride, and deionized water according to a certain mass ratio, first put boron nitride into deionized water and stir, then put it into an ultrasonic disperser for ultrasonication, then add zinc oxide and continue stirring until Dissolve completely, and finally centrifuge the mixed solution with a centrifuge to obtain a mixed powder of zinc oxide and boron nitride, which is dried for use;

[0032] Step 2, placing the mixed powder obtained in step 1 in a ball mill, and after ball milling evenly, obtain zinc oxide and boron nitride ball mill powder for use;

[0033] Step 3, configuring a tris buffer solution with a concentration of 2 g / l, and then adjusting the pH of the tris buffer solution with dilute hydrochloric acid to be 8.5 to prepare a Tris-HCl buffer solution;

[0034] Step 4. Take the zinc oxide and boron nitride ball milling pow...

specific Embodiment approach 2

[0045] An EPDM rubber-based cable accessory material prepared according to the preparation method of an EPDM rubber-based cable accessory material described in Embodiment 1 has a breakdown strength of 80.72 kV / mm, and a nonlinear coefficient of It can reach 1.36, and the threshold field strength is 19.8kV / mm.

specific Embodiment approach 3

[0048] A preparation method of EPDM rubber-based cable accessory material, comprising the steps of:

[0049] Step 1. Weigh zinc oxide, boron nitride, and deionized water according to a certain mass ratio, first put boron nitride into deionized water and stir, then put it into an ultrasonic disperser for ultrasonication, then add zinc oxide and continue stirring until Dissolve completely, and finally centrifuge the mixed solution with a centrifuge to obtain a mixed powder of zinc oxide and boron nitride, which is dried for use;

[0050] Step 2, placing the mixed powder obtained in step 1 in a ball mill, and after ball milling evenly, obtain zinc oxide and boron nitride ball mill powder for use;

[0051] Step 3, configuring a tris buffer solution with a concentration of 2 g / l, and then adjusting the pH of the tris buffer solution with dilute hydrochloric acid to be 8.5 to prepare a Tris-HCl buffer solution;

[0052] Step 4. Take the zinc oxide and boron nitride ball milling pow...

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Abstract

The invention provides a preparation method of an ethylene propylene diene monomer based cable accessory material and the ethylene propylene diene monomer based cable accessory material prepared by the preparation method and belongs to the field of direct-current cable accessory materials. The preparation method comprises the following steps: firstly, obtaining mixed powder of zinc oxide particlesand boron nitride sheets through means of ultrasonic dispersion, dopamine covering and centrifuging; uniformly dispersing the mixed powder of the zinc oxide particles and the boron nitride sheets into ethylene propylene diene monomer through a melting-blending method; then carrying out hot-pressing vulcanization and molding to prepare the ethylene propylene diene monomer based cable accessory material. The cable accessory material prepared by the preparation method is applicable to middle-voltage and low-voltage cable circuits and has relatively stable breakdown strength and relatively high non-linear electric conductivity coefficient; the technical difficulty that electric field distortion is caused in a direct-current high-voltage cable accessory when the material has electric conductivity difference and an interface has space charge accumulation is overcome so that the service life of the cable accessory is prolonged. The preparation method provided by the invention has the advantages of simple technology and needed equipment, low cost, environmental protection and no pollution.

Description

technical field [0001] The invention belongs to the field of direct current cable accessory materials, and in particular relates to a preparation method of an EPDM-based cable accessory material and the EPDM-based cable accessory material. Background technique [0002] High-voltage DC cable lines have the advantages of low loss, large transmission capacity, unlimited transmission distance, high operational stability, and can be connected to asynchronous power grids. Their applications have attracted more and more attention. As an important part of the cable line, cable accessories, due to the difference in conductivity of different materials in the middle of the cable and at the terminal joints, lead to the accumulation of space charges, resulting in uneven distribution of the electric field of the accessories, which leads to breakdown failures of the accessories, limiting high-voltage DC. The rapid development of the cable industry. [0003] At present, the commonly used m...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08K9/04C08K3/22C08K7/00C08K3/38C08K5/14H01B3/28
CPCC08K3/22C08K3/38C08K5/14C08K7/00C08K9/04C08K2003/2296C08K2003/385C08K2201/003C08K2201/011H01B3/28C08L23/16
Inventor 张天栋郝玉义迟庆国张昌海陈庆国王暄赵洪
Owner HARBIN UNIV OF SCI & TECH
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