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Silicon rubber for DC ultrahigh voltage crosslinked cable prefabricated intermediate joint and preparation method thereof

A technology for cross-linked cables and intermediate joints, applied in the field of cable accessories, can solve the problems of complex processing technology, partial discharge of cable accessories, energy consumption, etc., and achieve the effects of good thermal stability, fast discharge speed and high conductivity

Active Publication Date: 2016-09-07
江苏安靠智能输电工程科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The reason why the silicone rubber material is not very ideal is that the discharge is not timely, and the charge is easy to accumulate in the material, for example: CN201110455403. A heat-shrinkable stress tube and its production process, although it solves the problem of the current stress tube material and process. The problem of moisture absorption, but it does not solve the problem that the discharge of the stress tube material is not timely, and the charge is easy to accumulate in the material
Moreover, the processing technology is complicated, energy consumption and cost are high
[0005] Under the action of high-voltage DC electric field, the internal electric field of the silicone rubber material insulation with the above properties will be distorted, resulting in partial discharge of cable accessories, resulting in insulation damage, and it is easy to break down the intermediate joint, so this silicone rubber DC material has always been a problem

Method used

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  • Silicon rubber for DC ultrahigh voltage crosslinked cable prefabricated intermediate joint and preparation method thereof

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preparation example Construction

[0028] The preparation method of the silicone rubber of the DC ultra-high voltage prefabricated intermediate joint comprises the following steps:

[0029] Step 1: Polysiloxane, fumed silica SiO 2 , chloroplatinic acid-divinyltetramethyldisiloxane, ferric oxide or oxides of manganese, zinc, nickel, and copper are mixed, stirred at 50-70°C for 2-4h, and then placed in Vacuumize the airtight container at 0.5-3kPa and keep it for 3-5 minutes to remove air bubbles to obtain component A silicone rubber; polysiloxane, fumed silica, chloroplatinic acid-divinyltetramethyldisiloxane , Fe2O3 or manganese, zinc, nickel, copper oxide weight ratio is 80-100:10-18:1-2:2-6.

[0030] Step 2: After mixing polysiloxane, fumed silica, polymethylhydrogen siloxane, 1-hexyne or compounds containing amines, tin or phosphorus, stir at 40-60°C for 0.5-3h , and then placed in a closed container and vacuumed at 0.5-3kPa for 3-5 minutes to remove air bubbles to obtain component B silicone rubber; polysi...

Embodiment 1

[0034] Preparation of A1 and B1 component silica gel.

[0035] Preparation of A1 component silicone rubber:

[0036] Get the polysiloxane of 80 mass parts, add the fumed white carbon black SiO of 10 mass parts 2 and 1 mass part of chloroplatinic acid-divinyltetramethyldisiloxane and 2 mass parts of ferric oxide, mix well, stir for 2 hours at 50°C, and then vacuumize in a closed container 0.5kPa, maintain for 3 minutes, remove air bubbles, and obtain A1 component silicone rubber.

[0037] Preparation of B1 component silicone rubber:

[0038] Get the polysiloxane of 80 mass parts, add the fumed white carbon black SiO of 6 mass parts 2 Mix well with 1 mass part of polymethylhydrogensiloxane and 0.5 mass part of 1-hexyne, stir for 3 hours at 60°C, then place in a closed container and vacuumize at 0.5kPa for 3 minutes. Remove air bubbles to obtain component B1 silicone rubber.

[0039] Take 80 parts by mass of silicone rubber of component A1 and 80 parts by mass of silicone ru...

Embodiment 2

[0040] Example 2: Preparation of silica gel for components A2 and B2.

[0041] Preparation of A2 component silicone rubber:

[0042] Get the polysiloxane of 100 mass parts, add the fumed white carbon black SiO of 11 mass parts 2 and 1.2 parts by mass of chloroplatinic acid-divinyltetramethyldisiloxane and 2.5 parts by mass of ferric oxide, mixed uniformly and stirred for 4 hours at 60 ° C, and then placed in a closed container to vacuumize 1kPa, maintain for 5 minutes, remove air bubbles, and obtain A2 component silicone rubber.

[0043] Preparation of B2 component silicone rubber:

[0044] Get the polysiloxane of 100 mass parts, add the fumed white carbon black SiO of 7 mass parts 2 and 1.5 parts by mass of polymethylhydrogensiloxane and 0.8 parts by mass of reaction inhibitor, mix well and stir for 2 hours at 60°C, then place in a closed container and vacuumize at 1.5kPa for 4 minutes to remove air bubbles to obtain B2 component silicone rubber.

[0045] Take 100 parts by...

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Abstract

The invention discloses a silicon rubber for DC ultrahigh voltage crosslinked cable prefabricated intermediate joint. The silicon rubber includes polysiloxane, carbon-white, a platinum catalyst, a heat stabilizer, a crosslinking agent, a reaction inhibitor and a nano-conductive factor in the weight ratio of 80-100:5-20:1-5:1-10:1-5:0.5-5:1-10. A preparation method of the silicon rubber for DC ultrahigh voltage crosslinked cable prefabricated intermediate joint comprises the following steps: 1, mixing polysiloxane, carbon-white, platinum catalyst and heat stabilizer in the weight ratio of 80-100:10-18:1-2:2-6 to obtain a silicone rubber component A; 2, mixing polysiloxane, carbon-white, crosslinking agent and reaction inhibitor in the weight ratio of 80-100:6-12:1-3:0.5-1 to obtain a silicone rubber component B; and 3, mixing and evenly stirring the silicone rubber component A and silicone rubber component B in the weight or volume ratio of 1:1, and adding a nano conductive factor to obtain a final silicone rubber. The silicone rubber has the characteristics of high conductivity, high discharge speed, high strength, better thermal stability, lower cost and better economic performance.

Description

technical field [0001] The invention relates to the field of cable accessories in the electric power industry, in particular to a preparation method for a prefabricated intermediate joint of silicone rubber of a DC ultra-high voltage cross-linked cable and the silicone rubber. Background technique [0002] At present, most domestic urban and submarine power transmission projects use cross-linked polyethylene insulated cables for power transmission. Large-scale power transmission lines are transported by cables, among which the silicone rubber prefabricated intermediate joints of DC ultra-high voltage cross-linked cables are important connecting parts used in large-length DC cable transmission systems. [0003] The existing silicone rubber materials for making the prefabricated intermediate joints of DC ultra-high voltage cross-linked cables have not been very ideal, for example: CN200610063395 is an outdoor terminal of cross-linked cable composite insulation sleeve; CN201220...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/05C08K13/06C08K9/10C08K3/08C08K3/36C08K3/22
CPCC08K2201/001C08K2201/011C08L83/04C08L2201/08C08L2203/20C08L2205/025C08L2205/03C08K13/06C08K9/10C08K2003/085C08K3/36C08K2003/2272C08K2003/0806
Inventor 陈晓鸣张俊
Owner 江苏安靠智能输电工程科技股份有限公司