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Insulation force-receiving member for ultra-high voltage direct current power transmission and transformation and preparation method thereof

A technology of ultra-high voltage DC and force-bearing parts, which is applied in the fields of motors and transformers, insulating structural force-bearing parts, insulating force-bearing parts for ultra-high voltage DC power transmission and transformation and the field of preparation thereof, which can solve the problem that the retention rate of bending strength is difficult to maintain. problems such as poor tracking resistance, poor tracking resistance, and inability to meet at the same time, to achieve significant practical use value and application prospects, excellent performance, high mechanical strength and electrical properties.

Active Publication Date: 2017-12-26
SICHUAN DONGFANG INSULATING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although halides have excellent flame retardant properties, they have been proven to emit toxic and harmful gases such as hydrogen halides, polybrominated dibenzodioxins, and furans when burned at high temperatures, and there is a problem of great environmental pollution.
[0004] In addition, for the current insulation stress parts used in power transmission and transformation, UHV (UHV refers to: voltage of ±800 kV) DC power transmission customers have also put forward higher requirements, except for the presence of halogen-containing flame-retardant materials In addition, its bending strength retention rate at ±800 kV voltage, 155°C and humidity ≥ 90% is difficult to reach more than 50% at room temperature. When the bending strength at 23°C is 450MPa, the bending strength at 155°C Usually only 50MPa ~ 80MPa, and the tracking resistance performance is also very poor, often break down at 200V ~ 300V
In short, it is impossible to meet the following requirements of the insulating stress parts for UHV DC power transmission and transformation at the same time: (1) The bending strength retention rate at 155°C is ≥50% (ie: the bending strength at 155°C is ≥170MPa), (2) there is no Halogen FV0 flame retardant, (3) tracking resistance reaches 600V pass

Method used

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  • Insulation force-receiving member for ultra-high voltage direct current power transmission and transformation and preparation method thereof
  • Insulation force-receiving member for ultra-high voltage direct current power transmission and transformation and preparation method thereof
  • Insulation force-receiving member for ultra-high voltage direct current power transmission and transformation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0045] At room temperature, add 32 parts of bisphenol A epoxy resin and 17 parts of DOPO-DICY to the glue tank respectively, and after stirring for 1 hour at 105°C, add 10 parts of inorganic flame retardant sodium basic aluminum carbonate, tert- 12 parts of amine curing agent 4,4-diaminodiphenylmethane, 2 parts of phthalocyanine blue pigment, 27 parts of toluene, stir for 1 hour to make it fully dispersed, add 0.02 parts of accelerator 2-methylimidazole to adjust the glue The forming time of the glue is taken, and the forming time of the glue is tested by the knife method (180 ℃ hot plate) for 480 seconds, and the adhesive is prepared.

Embodiment 1-2

[0047] At room temperature, add 35 parts of bisphenol F epoxy resin and 15 parts of DOPO-DDM to the glue tank, stir at 75°C for 1 hour, add 6 parts of inorganic flame retardant aluminum hydroxide, tertiary amine to cure Agent 4, 12 parts of 4-diaminodiphenyl sulfone, 3 parts of titanium dioxide, 29 parts of xylene, stirred for 0.42 hours to make it fully dispersed, then added 0.02 parts of accelerator 2-ethyl-4-methylimidazole Adjust the molding time of the glue, take a sample, and use the knife method to test the molding time of the glue (180°C hot plate) for 520 seconds, and the adhesive is prepared.

Embodiment 1-3

[0049] At room temperature, add 31 parts of alicyclic epoxy resin and 12 parts of ODOPM-DDS to the glue tank respectively, and after stirring at 130°C for 1.5 hours, add 7 parts of inorganic flame retardant hydrotalcite and tertiary amine curing agent 10 parts of m-phenylenediamine, 2 parts of medium chrome yellow pigment, 38 parts of ethylene glycol ethyl ether acetate, stirred for 1 hour to make it fully dispersed, and then add 0.02 parts of boron trifluoride ethylamine to adjust the molding of the glue Time, sampling, test the molding time of the glue solution (180°C hot plate) for 450 seconds with a knife method, and the adhesive is prepared.

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Abstract

The invention discloses an insulation stressed member used for extra-high voltage direct current power transmission and transformation, and a preparation method thereof. The insulation stressed member is a composite material product prepared via hot press molding of one layer or more overlapped epoxy-composite amine alkali-free glass fiber-fabric prepreg. The preparation method comprises following steps: an epoxy-composite amine adhesive is prepared, the epoxy-composite amine alkali-free glass fiber-fabric prepreg is prepared, and the insulation stressed member used for extra-high voltage direct current power transmission and transformation is prepared. Bending strength retention rate of the insulation stressed member used for extra-high voltage direct current power transmission and transformation at 155 DEG C is much higher than 50%; bending strength is capable of reaching 338 to 352MPa, and is much higher than a required lowest value 170MPa; the insulation stressed member is capable of reaching halogen-free FV0-grade flame retardant rating, creepage trace resistance is qualified under 600V; the insulation stressed member is especially suitable for extra-high voltage direct current power transmission and transformation, can be applied to the field such as motor, transformer, and high temperature resistant structural composite material, and is excellent in performance and practicality.

Description

technical field [0001] The invention belongs to an insulating structure force-bearing part and its preparation, and relates to an insulating force-bearing part for UHV DC power transmission and transformation and a preparation method thereof. The insulating force-bearing part for UHV DC power transmission and transformation of the present invention is particularly suitable for use as an insulating structural force-bearing part for UHV DC power transmission and transformation, as well as applications in fields such as motors and transformers. Background technique [0002] As one of the important composite materials in motor insulation, the stressed part of the insulation structure is mostly made of epoxy resin and phenolic resin as the matrix resin, which is reinforced by fiber and then pressed at high temperature. In the motor, different conductors are isolated and the current is pressed Requirements for flow in a predetermined direction. [0003] Epoxy resin-based composit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08K13/04C08K7/14C08K7/00C08K5/5399C08K5/5313C08K3/26C08K3/22C08K3/38C08K3/34C08K3/36C08K3/04C08K3/32C08J5/24B32B27/04B32B27/18B32B27/38B32B37/06B32B37/10
Inventor 杜旻黄洪驰马庆柯唐安斌刘锋邵亚婷
Owner SICHUAN DONGFANG INSULATING MATERIAL