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Preparation method of insulation material for transformer

A technology for insulating materials and transformers, which is applied in the field of preparation of insulating materials, can solve problems such as transformer failures, and achieve the effects of improved electrical insulation performance and flame retardant performance, simple preparation method and large specific surface area.

Inactive Publication Date: 2018-08-03
山东励仙电力工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual transformer, the insulating material is subjected to high-intensity electric field stress for a long time, and once a breakdown occurs, the transformer will fail
If the electrical performance of the insulating material can be improved, the usage of the insulating material can be saved, the working life of the insulating material can be extended, and the volume and core loss of the transformer can be limited. Therefore, it is necessary to study a better insulating material to improve the existing lack of technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation method for an insulating material for a transformer, comprising the following preparation steps:

[0025] a. Mix modified montmorillonite, titanium dioxide, modified mica powder and titanium dioxide, dry at 60°C for 15 minutes, then introduce into a ball mill, and ball mill for 3 hours to obtain powder;

[0026] b. Add lubricant and antioxidant to the powder, place it in a reaction kettle, heat and stir at 260°C for 20 minutes, after the dispersion is uniform, cool down to 120°C to obtain mixture 1;

[0027] c. Mix the modified epoxy resin emulsion, propylene glycol alginate, polyurethane emulsion, cellulose base material and toughening agent, introduce it into the mixer, stir at the speed of 350r / min for 25min, and then use ultrasonic dispersion for 15min, Obtain mixture two;

[0028] d. Mix mixture 1, mixture 2, sodium carboxymethyl cellulose and sodium silicate, introduce into a flat vulcanizing machine, heat and press to form, and the finished product...

Embodiment 2

[0037] A preparation method for an insulating material for a transformer, comprising the following preparation steps:

[0038] a. Mix modified montmorillonite, titanium dioxide, modified mica powder and titanium dioxide, dry at 60°C for 10 minutes, then introduce into a ball mill, and ball mill for 3 hours to obtain a powder;

[0039] b. Add lubricant and antioxidant to the powder, place it in a reaction kettle, heat and stir at 220°C for 20 minutes, after the dispersion is uniform, cool down to 100°C to obtain mixture 1;

[0040] c. Mix the modified epoxy resin emulsion, propylene glycol alginate, polyurethane emulsion, cellulose base material and toughening agent, introduce it into the mixer, stir at the speed of 350r / min for 20min, and then use ultrasonic dispersion for 10min, Obtain mixture two;

[0041] d. Mix mixture 1, mixture 2, sodium carboxymethyl cellulose and sodium silicate, introduce into a flat vulcanizing machine, heat and press to form, and the finished produ...

Embodiment 3

[0050] A preparation method for an insulating material for a transformer, comprising the following preparation steps:

[0051] a. Mix modified montmorillonite, titanium dioxide, modified mica powder and titanium dioxide, dry at 80°C for 15 minutes, then introduce into a ball mill, and ball mill for 5 hours to obtain a powder;

[0052] b. Add lubricant and antioxidant to the powder, place it in a reaction kettle, heat and stir at 260°C for 30 minutes, after the dispersion is uniform, cool down to 120°C to obtain mixture 1;

[0053] c. Mix the modified epoxy resin emulsion, propylene glycol alginate, polyurethane emulsion, cellulose base material and toughening agent, introduce it into the mixer, stir at a speed of 460r / min for 35min, and then use ultrasonic dispersion for 15min, Obtain mixture two;

[0054] d. Mix mixture 1, mixture 2, sodium carboxymethyl cellulose and sodium silicate, introduce into a flat vulcanizing machine, heat and press to form, and the finished product...

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PUM

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Abstract

The invention provides a preparation method of an insulation material for a transformer. The method comprises the following steps that a, modified montmorillonite, titanium dioxide, modified mica powder and titanium pigment are subjected to mixing, drying and ball grinding to obtain powder; b, a lubricating agent and an antioxidant are added into the powder; heating and stirring are performed; themixture is uniformly dispersed to obtain a first mixture; c, modified epoxy resin emulsion, propylene glycol alginate, polyurethane emulsion, cellulose base material and a toughening agent are mixedand stirred; then, ultrasonic dispersion is performed to obtain a second mixture; d, the first mixture, the second mixture, sodium carboxymethylcellulose and sodium silicate are mixed and are guided into a flat plate vulcanizing machine; heating, pressurization and formation are performed. The preparation method is simple; the performance such as heat conduction, weatherability and high temperature resistance is good; good application prospects are realized when the insulation material is used for the transformer.

Description

technical field [0001] The invention belongs to the technical field of insulating materials, and in particular relates to a preparation method of insulating materials used for transformers. Background technique [0002] Insulating materials, also known as dielectrics, are materials with high resistivity and low conductivity. Insulating materials can be used to isolate conductors that are charged or at different potentials, allowing current to flow in a certain direction. In transformer products, insulating materials also play a role in heat dissipation, cooling, support, fixing, arc extinguishing, improving potential gradient, moisture-proof, mildew-proof, and conductor protection. [0003] Insulation materials are widely used as insulation materials for equipment such as motors, cables, capacitors, and transformers, and are also the main constituent materials of insulation materials such as laminates, composite materials, and prepreg materials. Due to the special use of i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L5/04C08L75/04C08L1/02C08K13/06C08K9/06C08K3/34C08K3/22
CPCC08L63/00C08K2003/2241C08K2201/014C08L1/02C08L5/04C08L75/04C08L2201/08C08L2203/20C08L2205/035C08K13/06C08K9/06C08K3/346C08K3/34C08K3/22
Inventor 伍文慧
Owner 山东励仙电力工程有限公司
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