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Insulation layer for UHV DC power transmission and transformation, molded structural part and preparation method thereof

A technology for UHV DC and insulating layers, which is applied in the fields of molded structural parts and their preparation, molded structural parts, insulating layers for UHV DC power transmission and transformation, and insulating layers, and can solve problems such as difficulty in achieving bending strength retention

Active Publication Date: 2018-02-09
SICHUAN DONGFANG INSULATING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Customers of UHV DC power transmission and transformation have also put forward higher requirements, requiring UHV (UHV refers to: voltage is ±800 kV) insulation layer and molded structural parts for power transmission and transformation not only to meet UL94V-0 flame retardant At the same time, it is required to be completely halogen-free. The bending strength retention rate of the products in the prior art in the environment of ±800 kV voltage, 155°C and humidity ≥ 90% is difficult to reach more than 50% at room temperature, and the bending strength at 23°C When it is 450MPa, the mechanical strength at 155°C must be greater than 170MPa, and the tracking resistance performance meets the voltage test of 600V and above
However, in the prior art, there are no reports that can meet the requirements for the use of insulating layers and molded structural parts for UHV DC power transmission and transformation at the same time. Therefore, how to solve the current technical problems has become the goal of relevant researchers.

Method used

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  • Insulation layer for UHV DC power transmission and transformation, molded structural part and preparation method thereof
  • Insulation layer for UHV DC power transmission and transformation, molded structural part and preparation method thereof
  • Insulation layer for UHV DC power transmission and transformation, molded structural part and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0069] At room temperature, add 30 parts of bisphenol A type epoxy resin and 15 parts of 9,10-dihydro-9-oxo-10-phosphaphenanthrene-10-oxide modified epoxy resin into the glue tank respectively, After stirring at 70°C for 2 hours, add 8 parts of inorganic flame retardant sodium basic aluminum carbonate, 12 parts of curing agent 4,4-diaminodiphenylmethane, 3 parts of phthalocyanine blue pigment, 32 parts of toluene, and stir for 1 Hours, after making it fully dispersed, add 0.02 parts of accelerator 2-methylimidazole to adjust the molding time of the glue, take a sample, test the molding time of the glue with a knife method (180°C hot plate) for 480 seconds, and the glue is prepared complete.

Embodiment 1-2

[0071] At room temperature, add 29 parts of bisphenol F type epoxy resin and 17 parts of 9,10-dihydro-9-oxo-10-phosphaphenanthrene hydroquinone modified epoxy resin respectively in the compounding tank, at 130 After stirring at ℃ for 1 hour, add 10 parts of inorganic flame retardant aluminum hydroxide, 11 parts of curing agent 4,4-diaminodiphenyl sulfone, 1 part of titanium dioxide pigment, 32 parts of ethylene glycol ethyl ether acetate, and stir for 0.42 Hours, after fully dispersed evenly, add accelerator 2-ethyl-4-methylimidazole 0.01 part to adjust the molding time of the glue, take a sample, test the molding time of the glue with a knife method (180 ℃ hot plate) 510 seconds, glue The liquid is prepared.

Embodiment 1-3

[0073] At room temperature, respectively add 32 parts of cycloaliphatic epoxy resin and 17 parts of 9,10-dihydro-9-oxo-10-phosphaphenanthrenequinone modified epoxy resin into the compounding tank. After stirring at low temperature for 1.5 hours, add 9 parts of inorganic flame retardant hydrotalcite, 10 parts of curing agent m-phenylenediamine, 3 parts of medium chrome yellow pigment, 29 parts of methyl acetate, stir for 1 hour, make it fully dispersed, and then add The accelerator boron trifluoride ethylamine 0.02 part adjusts the molding time of the glue, takes a sample, and uses the knife method to test the molding time of the glue (180°C hot plate) for 450 seconds, and the glue is prepared.

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Abstract

The invention discloses an insulating layer and a molded structural part for ultra-high voltage direct current transmission and transformation. The composite material obtained after hot pressing; the prepreg is made by impregnating the alkali-free glass fiber-fabric with a modified epoxy adhesive, and then pre-baked; the modified epoxy adhesive The composition and weight ratio of the agent are: 28-32 parts of epoxy resin, 12-17 parts of phosphorus-containing resin, 8-12 parts of inorganic flame retardant, 10-12 parts of curing agent, 24-41 parts of solvent, accelerator 0.01-0.03 parts of agent, and 1-3 parts of pigment. The composite material of the invention is particularly suitable for the fields of insulating layers for UHV DC power transmission and transformation, molded structural parts, high-voltage motors, power transformers, etc., and has excellent performance and strong practicability.

Description

technical field [0001] The invention relates to an insulating layer and a molded structural part, in particular to an insulating layer for UHV direct current transmission and transformation, a molded structural part and a preparation method thereof. The invention is particularly suitable for the application in the fields of insulating layers for ultra-high voltage direct current transmission and transformation, molded structural parts, high-voltage motors, power transformers and the like. Background technique [0002] With the continuous development of ultra-high voltage and ultra-high voltage power grids above 220KV, the voltage level is constantly increasing, and the amplitude of operating overvoltage and power frequency overvoltage is also increasing. Under the restriction of measures, the hazards have been greatly weakened, but the protection of internal overvoltage is still mainly supported by insulating materials, so the requirements for the performance of related supp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08L63/02C08L63/04C08L61/14C08K13/04C08K7/14C08K3/26C08K3/22C08K3/24C08K3/34C08J5/24
Inventor 黄洪驰唐安斌杜旻马庆柯刘锋邵亚婷
Owner SICHUAN DONGFANG INSULATING MATERIAL