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Inner core filling material for composite insulating cross arm, and preparation method thereof

A technology of composite insulation and filling materials, which is applied in the field of inner core filling materials, can solve the problems of closed porosity and pore size affecting internal field strength, reduction of breakdown voltage of polyurethane, low density insulation performance, etc., to improve physical/electrical properties , Improving the ability to resist voltage breakdown and improving the effect of insulation performance

Active Publication Date: 2019-07-12
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of the performance of the polyurethane material itself, the molded polyurethane foam has the characteristics of both solid and hollow materials, has low density and good insulation performance, but has the following problems. It will affect the internal field strength after water penetration, resulting in a decrease in the breakdown voltage of polyurethane; secondly, the performance parameters of different components of polyurethane materials have an impact on dye penetration experiments and water diffusion experiments

Method used

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  • Inner core filling material for composite insulating cross arm, and preparation method thereof
  • Inner core filling material for composite insulating cross arm, and preparation method thereof
  • Inner core filling material for composite insulating cross arm, and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0033] An inner core filling material for a composite insulating cross arm, comprising the following raw materials in parts by weight:

[0034] Sodium lauryl sulfate is 1 part, ultrapure water is 8 parts, diphenylmethane diisocyanate is 1000 parts, polypropylene glycol 400 is 950 parts, and modified silica is 1 part, and the modified silica The preparation method comprises the following steps:

[0035] (1) Dissolve 19.4g of sodium metasilicate in 200ml of distilled water, add 100mL of NH 4 Cl, mixed evenly;

[0036] (2) Then place the uniformly mixed solution in a water bath, control the temperature of the water bath to 60°C, and stir for 3 hours;

[0037] (3) After stirring, cool to room temperature, filter, and then wash the solid filtrate with distilled water for 3 times;

[0038] (4) Dissolve the cleaned solid filtrate in 100 mL of ethanol, then add 0.01 mol of trimethylchlorosilane, stir well, heat at 80° C. for 3 h, then cool to room temperature, and precipitate a sol...

Embodiment 2

[0049] An inner core filling material for a composite insulating cross arm, comprising the following raw materials in parts by weight:

[0050] Sodium lauryl sulfate is 1.5 parts, ultrapure water is 9 parts, diphenylmethane diisocyanate is 1100 parts, polypropylene glycol 400 is 1000 parts, and modified silicon dioxide is 3 parts, and described modified silicon dioxide The preparation method comprises the following steps:

[0051] (1) Dissolve 25.9g of sodium metasilicate in 300ml of distilled water, add 130mL of NH 4 Cl, mixed evenly;

[0052] (2) Then place the uniformly mixed solution in a water bath, control the temperature of the water bath to 72°C, and stir for 3 hours;

[0053] (3) After stirring, cool to room temperature, filter, and then wash the solid filtrate with distilled water for 3 times;

[0054] (4) Dissolve the cleaned solid filtrate in 130 mL of ethanol, then add 0.02 mol of trimethylchlorosilane, stir well, heat at 80° C. for 3 h, then cool to room tempera...

Embodiment 3

[0065] An inner core filling material for a composite insulating cross arm, comprising the following raw materials in parts by weight:

[0066] Sodium lauryl sulfate is 2 parts, ultrapure water is 10 parts, diphenylmethane diisocyanate is 1150 parts, polypropylene glycol 400 is 1000 parts, and modified silicon dioxide is 5 parts, and described modified silicon dioxide The preparation method comprises the following steps:

[0067] (1) Dissolve 31.5g of sodium metasilicate in 400ml of distilled water, add 150mL of NH 4 Cl, mixed evenly;

[0068] (2) Then place the uniformly mixed solution in a water bath, control the temperature of the water bath to 75°C, and stir for 3 hours;

[0069] (3) After stirring, cool to room temperature, filter, and then wash the solid filtrate with distilled water for 3 times;

[0070] (4) Dissolve the cleaned solid filtrate in 250 mL of ethanol, then add 0.04 mol of trimethylchlorosilane, stir evenly, heat at 80° C. for 3 h, cool to room temperatu...

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Abstract

The invention discloses an inner core filling material for composite insulating cross arm, and a preparation method thereof. The inner core filling material comprises, by weight, 1-2 parts of a foam stabilizer, 8-10 parts of a catalyst, 1000-1200 parts of a black material, 950-1050 parts of a white material and 1-10 parts of a filler. A certain amount of the filler is added to increase the horizontal contact angle of the inner core filling material to 140 DEG, so the aging resistance and the breakdown resistance are improved. The preparation method is novel and unique, and has an ingenious concept, and the inner core filling material prepared by the method can greatly improve the insulating performance and the service life of the composite insulating cross arm.

Description

technical field [0001] The invention relates to the technical field of inner core filling materials, in particular to an inner core filling material used for a composite insulating cross-arm and a preparation method thereof. Background technique [0002] With the improvement of the technical level of my country's power grid, the transmission line presents a long-distance, large-scale and large-scale development trend. At present, my country's transmission lines are still operating in the form of traditional iron towers, steel pipe poles, and concrete poles equipped with steel cross arms and suspended insulator strings. In order to meet the requirements of the corresponding insulation distance and creepage distance, the metal cross-arm must be equipped with very long insulator strings. In severe weather such as strong winds, rain and snow, faults often occur due to wire galloping, which seriously threatens the safety of transmission lines. Operation, the higher the voltage l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/32C08J9/30C08K9/06C08K3/36
CPCC08G18/3206C08J9/30C08K9/06C08K3/36C08J2375/04
Inventor 刘云鹏李乐张铭嘉刘贺晨
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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