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Insulating rubber for ultrahigh-voltage direct-current cable accessory and preparation method thereof

A DC cable and insulating rubber technology, which is applied in the field of insulating rubber for ultra-high voltage DC cable accessories and its preparation, can solve problems such as complex electric field distribution, and achieve the effect of optimizing the mixing process and good electrical performance

Pending Publication Date: 2021-01-22
CHANGLAN CABLE ACCESSORIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the volume resistivity of insulating materials is affected by both DC field strength and temperature, the electric field distribution is more complicated

Method used

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  • Insulating rubber for ultrahigh-voltage direct-current cable accessory and preparation method thereof
  • Insulating rubber for ultrahigh-voltage direct-current cable accessory and preparation method thereof
  • Insulating rubber for ultrahigh-voltage direct-current cable accessory and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1 of the present invention is: an insulating rubber for ultra-high voltage DC cable accessories, and its chemical composition and parts by weight are as follows: EPDM rubber of Korean KEP210: 100 parts, zinc oxide: 5 parts, stearic acid: 1 Parts, antioxidant RD: 1 part, naphthenic oil: 15 parts, kaolin: 50 parts, talcum powder: 20 parts, bis-(γ-triethoxysilylpropyl) tetrasulfide: 4 parts, nano-oxidized Magnesium: 10 parts, Dicumyl peroxide: 3 parts, 2-Mercaptobenzothiazole: 0.5 parts, Triallyl isocyanurate: 1 part.

[0049] The preparation method of the above-mentioned insulating rubber for extra-high voltage DC cable accessories comprises the following steps:

[0050] S1: Put the formulated amount of nano-modified filler and the formulated amount of EPDM rubber into a pressurized internal mixer for 8 minutes to break the rubber and make a nano-modified masterbatch;

[0051] S2: Add the zinc oxide, stearic acid and anti-aging agent RD in the formula amount i...

Embodiment 2

[0056] Embodiment 2 of the present invention adopts the same preparation method as Embodiment 1. Embodiment 2 of the present invention is: an insulating rubber for ultra-high voltage DC cable accessories, and its chemical composition and parts by weight are as follows: EPDM rubber of Korean KEP210 : 100 parts, zinc oxide: 5 parts, stearic acid: 1 part, antioxidant RD: 1 part, paraffin oil: 7 parts, kaolin clay: 20 parts, talcum powder: 10 parts, vinyl tris(β-methoxy Ethoxy) silane: 2 parts, nano magnesium oxide: 8 parts, dibenzoyl peroxide: 2.5 parts, 2-mercaptobenzothiazole: 05 parts, triallyl isocyanurate: 15 parts.

Embodiment 3

[0058] Embodiment 3 of the present invention adopts the same preparation method as Embodiment 1. Embodiment 3 of the present invention is: an insulating rubber for ultra-high voltage DC cable accessories, and its chemical composition and parts by weight are as follows: EPDM rubber of Korean KEP210 : 100 parts, zinc oxide: 6 parts, stearic acid: 1.5 parts, antioxidant RD: 1 part, paraffin oil: 9 parts, kaolin: 40 parts, talcum powder: 15 parts, bis-(γ-triethoxy Silyl propyl) tetrasulfide: 3 parts, nano-alumina: 8 parts, dicumyl peroxide: 3 parts, 2-mercaptobenzothiazole: 1 part, triallyl isocyanurate: 1 part share.

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Abstract

The invention provides insulating rubber for an ultrahigh-voltage direct-current cable accessory and a preparation method thereof. The insulating rubber is prepared from the following raw materials: ethylene propylene diene monomer, zinc oxide, stearic acid, an anti-aging agent, a plasticizer, a reinforcing agent, a nano filler modifier, a silane coupling agent, a vulcanizing agent and a vulcanization accelerator. By adjusting the dosage of the nano-filler modifier, changing the trap depth in the insulating material, adsorbing free charges in the material, reducing the number of the free charges and reducing charge accumulation, electric field distortion is reduced, electric field distribution is more uniform, effective control over volume resistivity is achieved, the electrical resistivity of the insulating material in a stress cone and the electrical resistivity of a cable insulating material reach the optimal matching state under different environment use temperature conditions. Meanwhile, electrical, mechanical, aging and forming properties and the like meet the technical index requirements, and the material can be applied to the field of ultrahigh-voltage direct-current cableinsulating materials.

Description

technical field [0001] The invention relates to the technical field of insulating rubber preparation, in particular to an insulating rubber for ultra-high voltage DC cable accessories and a preparation method thereof. Background technique [0002] Compared with the traditional AC transmission method in terms of long-distance and large-capacity transmission, ultra-high voltage DC (330kV~800kV) transmission has the advantages of flexible power range change, simple power control, excellent transmission line performance, small reactive power loss, and line voltage drop. , low transmission cost and other advantages, it is widely used in long-distance high-power transmission, high-speed submarine cable power transmission, asynchronous interconnection of power grids, etc. EHVDC transmission is the main trend of future power grid development. If the long-distance transmission of electric power is to be transformed into ultra-high-voltage DC cable transmission, the manufacturing tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L91/00C08K13/02C08K3/22C08K5/09C08K3/34C08K5/14
CPCC08L23/16C08K2003/2296C08K2201/011C08K2003/222C08K2003/2227C08L91/00C08K13/02C08K3/22C08K5/09C08K3/346C08K5/14
Inventor 贺志文乐新波
Owner CHANGLAN CABLE ACCESSORIES
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