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High dielectric constant stress control material

A high dielectric constant, stress control technology, applied in cable/conductor manufacturing, power cables with shielding/conducting layers, circuits, etc., can solve the problem of large geometric size, difficult to maintain stable resistance value, and inconvenient operation etc., to achieve the effect of uniform electric field

Inactive Publication Date: 2008-09-24
江苏宇诚业基电气设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the stress cone is made of semi-conductive material, its resistance value is affected by the production process and the electric field during operation, so it is difficult to keep stable
On the other hand, this method achieves the purpose of controlling the electric field by changing the geometric shape of the concentrated electric field. The geometric size of the product is large, the operation is inconvenient, and the requirements for on-site installation are very high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The quality components of high dielectric constant stress control materials are raw rubber: 100 parts; stearic acid: 0.5 parts; nano-zinc oxide: 5 parts; titanium dioxide: 6 parts; paraffin oil: 15 parts; carbon black: 20 parts; Joint agent: 2 parts; Sulfur: 2 parts; Dicumyl peroxide: 3 parts; Accelerator TMTD: 2 parts, enter the mixing and injection process;

[0012] Mixing process, the steps are divided into 1. Set the operating temperature of the open mill (model: XK-250) at 50 degrees; the thickness of the roller distance is 0.6mm; 2. The order of mixing and feeding and the mixing time, (1) Raw rubber / 1min; (2) stearic acid, titanium dioxide / 1min; (3) nano-zinc oxide / 1min; (4) accelerator TMTD / 3min; (5) add 1 / 2 carbon black, wherein carbon black is mixed with paraffin Mix oil and coupling agent / 4min; (6) Add 1 / 2 carbon black, in which carbon black is pre-mixed with paraffin oil and coupling agent / 15min; ) lower volume; (9) filter gel; (10) add sulfur, dicumyl perox...

Embodiment 2

[0016] The quality components of high dielectric constant stress control materials are raw rubber: 100 parts; stearic acid: 1.2 parts; nano-zinc oxide: 10 parts; titanium dioxide: 10 parts; paraffin oil: 25 parts; carbon black: 30 parts; Joint agent: 3 parts; sulfur: 3 parts; dicumyl peroxide: 4 parts; accelerator TMTD: 3 parts. Enter the mixing process and injection pressure process;

[0017] Mixing process, the steps are divided into 1. Set the operating temperature of the open mill at 60 degrees; set the thickness of the roller distance to 0.8mm; 2. Mixing and feeding sequence and mixing time, (1) raw rubber / 1min; (2) stearic acid, titanium dioxide / 1min; (3) nano-zinc oxide / 1min; (4) accelerator TMTD / 3min; (5) add 1 / 2 carbon black, wherein carbon black is mixed with paraffin oil and coupling agent in advance Mix well / 4min; (6) add 1 / 2 carbon black, wherein the carbon black is pre-mixed with paraffin oil and coupling agent / 15min; (7) thin pass twice, and the thickness of th...

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Abstract

This invention relates to a high dielectric constant stress control material characterizing that its mass composition includes: raw rubber: 100, stearic acid: 0.5-1.2, nm-ZnO: 5-10, TiO2: 6-10, olefin oil: 15-25, carbon black: 20-30, coupler: 2-3, sulfur: 2-3, dioxide DIPB: 3-4, accelerant TMTD: 2-3, and mixing and injection molding technics are applied to process it, which is advantaged that it can be prepared to a resistance-capacitance stress tube to control the stress of the cut place of shield of the cable to alter the potential distribution of the cable insulation surface so as to uniform the electric field and the break through phenomenon will not happen since field strength of this place is uniformly distributed.

Description

technical field [0001] The invention relates to a high dielectric constant stress control material, which is mainly used in stress control units of 6-35KV cable accessories. It belongs to the field of material technology. Background technique [0002] Because there is electric field distortion at the shielding cut-off place of the cable terminal and the shielding and insulation cut-off place of the cable intermediate joint, controlling the distribution and intensity of the electric field at this place is the core content of the design of the cable accessories. The current method of dealing with the field strength at the cable shield is mainly to use a stress cone (made of semi-conductive material) to equalize the field strength. The stress cone extends the cut-off part of the insulating shielding layer to make the zero potential form a trumpet shape, which improves the electric field distribution of the insulating shielding layer, reduces the possibility of corona generatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B9/02H01B3/28H01B13/00H01B13/22
Inventor 李彤朱艳江建洲齐勇汤志辉
Owner 江苏宇诚业基电气设备有限公司
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