High-temperature-resistant and high-tracking-resistant rotating insulator and preparation method thereof
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A technology for insulators and electric tracking resistance, applied in the direction of organic insulators, plastic/resin/wax insulators, etc., to achieve excellent temperature resistance, improve tracking resistance and arc resistance
Pending Publication Date: 2021-05-04
SICHUAN DONGFANG INSULATING MATERIAL
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Problems solved by technology
The present invention solves the problem of how to realize tracking resistance PTI600V passing and arc resistance ≥ 180s while maintaining high temperature (200°C) bending strength retention rate ≥ 50% and water immersion resistance ≥ 106MΩ for epoxy composite materials, thereby providing a High-temperature-resistant and high-tracking-resistant rotating insulator with good performance and preparation method thereof
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Embodiment 1-1
[0047] Add 7.5 parts of bisphenol A type epoxy resin, 9 parts of hydantoin epoxy resin, and 5.5 parts of naphthalene type epoxy resin into the glue tank respectively, stir at 55°C for 7 hours, add 7 parts of nano talcum powder, Stir at ℃ for 1 hour, add 4 parts of 4,4-diaminodiphenylsulfone, stir at 75℃ for 0.75 hours, then add 23 parts of acetone, 0.01 part of accelerator 2-methylimidazole, continue to stir at 65℃ for 0.35 After making it fully dispersed evenly, take a sample, test the molding time of the glue solution (210°C hot plate) with a knife method for 514 seconds, and the glue solution is prepared.
Embodiment 1-2
[0049] Add 5.5 parts of o-cresol type novolac epoxy resin, 8.3 parts of hydantoin epoxy resin, and 7 parts of triphenylmethane type epoxy resin into the compounding tank respectively, stir at 55°C for 7 hours, and add 11 parts of nano talcum powder part, stirred at 50°C for 1 hour, added 2 parts of 4,4-diaminodiphenylsulfone, stirred at 75°C for 0.75 hour, then added 20 parts of butanone, accelerator 2-ethyl-4-methylimidazole 0.012 parts, continue to stir at 65°C for 0.35 hours to fully disperse evenly, then take a sample, and test the molding time of the glue with a knife method (210°C hot plate) for 484 seconds, and the glue is ready.
Embodiment 1-3
[0051] Add 11 parts of phenol-type novolac epoxy resin, 13 parts of hydantoin epoxy resin, and 9 parts of naphthol-type epoxy resin into the compounding tank, stir at 55°C for 7 hours, add 15 parts of nano-aluminum hydroxide, and Stir at 50°C for 1 hour, add 2.5 parts of dicyandiamide, stir at 75°C for 0.75 hours, add 32 parts of ethylene glycol, 0.018 parts of accelerator aluminum acetylacetonate, and continue stirring at 65°C for 0.35 hours to fully After the dispersion is uniform, take a sample, and use the knife method to test the molding time of the glue solution (210°C hot plate) for 496 seconds, and the glue solution is prepared.
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Abstract
The invention discloses a high-temperature-resistant and high-tracking-resistant rotating insulator and a preparation method thereof. The high-temperature-resistant and high-tracking-resistant rotating insulator is characterized in that the rotating insulator is a composite material prepared by curing and molding overlapped high-strength resin fiber prepreg at the temperature of 175-265 DEG C; the high-strength resin fiber prepreg is a fiber impregnated material which is formed by coating a high-strength resin adhesive on fiber yarns through a gluing machine and then baking the fiber yarns and is provided with a resin prepreg on the fiber yarns; the high-strength resin adhesive is prepared by mixing matrix epoxy resin, hydantoin epoxy resin, modified resin, a curing agent, filler, an accelerant and a solvent. According to the invention, the bending strength retention rate of the rotating insulator at the temperature of 200 DEG C is greater than or equal to 50%, the immersion resistance is greater than or equal to 106 Momega, PTI600V passes through the rotating insulator, and the arc resistance is greater than or equal to 180 seconds; and the insulator is suitable for being used as an insulation stress piece in large power transmission and transformation fields such as ultra-high voltage electrical appliances and high-voltage electrical appliances.
Description
technical field [0001] The invention belongs to rotating insulators, and relates to a rotating insulator with high temperature resistance and high electric tracking resistance and a preparation method thereof. The high-temperature-resistant and high-tracking-resistant rotating insulator of the present invention is especially suitable for use as an insulating force-bearing member in large-scale power transmission and transformation fields such as ultra-ultra-high voltage electrical appliances and high-voltage electrical appliances. Background technique [0002] The rotating insulator is one of the key stress-bearing components of electrical switches in the field of high-voltage power transmission and transformation. It is a special insulating control that supports the wires and prevents the current from returning to the ground. It can realize different potential conductors or conductors and ground potential in overhead transmission lines. Effective insulation between componen...
Claims
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