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A special semi-conductive weft-free tape for transformer binding and its preparation method

A semi-conductive, weft-free technology, which is applied in the field of composite insulating materials, can solve the problems of partial discharge, high resistance of weft-free tape, and elevated working temperature of transformer oil, so as to reduce partial discharge.

Active Publication Date: 2022-04-12
马继
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional latitude-free tape has high resistance. After the iron core is bound, if the iron core works abnormally and generates a floating potential, the latitude-free tape cannot disperse the suspended charge caused by the abnormal operation of the iron core, resulting in partial discharge, eddy current, etc., which will cause transformer oil The increase of working temperature and the decrease of oil stability may also cause breakdown of other insulating materials such as insulating cardboard inside the transformer

Method used

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  • A special semi-conductive weft-free tape for transformer binding and its preparation method
  • A special semi-conductive weft-free tape for transformer binding and its preparation method
  • A special semi-conductive weft-free tape for transformer binding and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1 solvent-containing method

[0034] The formula ratio by weight is as follows:

[0035] 100 parts of unsaturated polyester resin; 0.2 parts of benzoyl peroxide; 2.0 parts of di-tert-butyl peroxide; 2.7 parts of metal copper powder; 6.3 parts of graphite powder; 2.1 parts of metal nickel powder; 4.8 parts of silicon carbide powder; 2 parts of calcium carbonate; 1 part of kaolin; 0.3 parts of fumed silica; 3.4 parts of styrene; 22 parts of diallyl phthalate; 3 parts of zinc stearate; 40 parts of acetone.

[0036] Concrete reaction process is as follows:

[0037] (1) Mixing: put 100 parts of unsaturated polyester, 22 parts of diallyl phthalate, and 40 parts of acetone into the reaction kettle and heat up to 40°C to dissolve, keep warm; put in 4.8 parts of silicon carbide powder and 2.1 parts of metal nickel powder in turn. Parts, 2.7 parts of metal copper powder, 6.3 parts of graphite powder, 1 part of kaolin, 0.3 parts of fumed silica, 2 parts of light calci...

Embodiment 2

[0054] Embodiment 2 solvent-containing method

[0055] The formula ratio by weight is as follows:

[0056] 100 parts of unsaturated polyester resin; 0.3 parts of benzoyl peroxide; 1.9 parts of di-tert-butyl peroxide; 2.7 parts of metal copper powder; 8.7 parts of graphite powder; 2.6 parts of metal nickel powder; 5.5 parts of silicon carbide powder; 1.8 parts of calcium carbonate; 1.5 parts of kaolin; 0.5 parts of fumed silica; 4 parts of styrene; 25 parts of diallyl phthalate; 2.2 parts of zinc stearate; 50 parts of acetone.

[0057] Concrete reaction process is as follows:

[0058] (1) Mixing: Put 100 parts of unsaturated polyester, 25 parts of diallyl phthalate, and 50 parts of acetone into the reaction kettle and heat up to 40°C to dissolve and keep warm; put in 5.5 parts of silicon carbide powder and 2.6 parts of metal nickel powder in turn. Parts, 2.7 parts of metal copper powder, 8.7 parts of graphite powder, 1.5 parts of kaolin, 0.5 parts of fumed silica, 1.8 parts o...

Embodiment 3

[0067] Embodiment 3 solvent-free method

[0068] The formula ratio by weight is as follows:

[0069] 100 parts of unsaturated polyester resin; 0.1 parts of benzoyl peroxide; 2.3 parts of di-tert-butyl peroxide; 1.7 parts of metal copper powder; 5.1 parts of graphite powder; 1.3 parts of metal nickel powder; 4.1 parts of silicon carbide powder; 1.3 parts of calcium carbonate; 1.2 parts of kaolin; 0.1 parts of fumed silica; 3.1 parts of styrene; 26 parts of diallyl phthalate; 2.1 parts of zinc stearate.

[0070] (1) Mixing: Take 100 parts of unsaturated polyester and 26 parts of diallyl phthalate, put them into the reactor and heat up to 75°C to melt, keep warm; put in 4.1 parts of silicon carbide powder, 1.3 parts of metal nickel powder, metal 1.7 parts of copper powder, 5.1 parts of graphite powder, 1.2 parts of kaolin, 0.1 part of fumed silica, 1.3 parts of light calcium carbonate, 2.1 parts of zinc stearate; Stir at 75°C with a speed of 60r / min for 40min;

[0071] (2) Feed...

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Abstract

The invention relates to a special semi-conductive weft-free tape for transformer binding and a preparation method thereof, belonging to the technical field of composite insulating materials. Its appearance is black, without weft, has thermal curing ability, has semi-conductive properties, anti-eddy current, partial discharge properties, anti-corona properties, and the resistance of the cured material is between 10 6 Ω~10 8 between Ω; the product of the present invention can be prepared by a solvent method or a solventless method. The special semi-conductive latitude-free tape for transformer binding produced by the present invention has semi-conductive properties, anti-eddy current, partial discharge properties, and anti-corona properties, and is applied to the iron core binding of dry-type / oil-immersed transformers, and is used for iron core columns Partial tightening, binding, and reducing the probability of partial discharge and eddy current when the iron core works abnormally.

Description

technical field [0001] The invention relates to a special semi-conductive weft-free tape for binding transformers and a preparation method thereof, belonging to the technical field of composite insulating materials. Background technique [0002] The traditional latitude-free tape is a tape-shaped insulating binding material with a certain width prepared by impregnating high-temperature-resistant heat-curing unsaturated polyester resin with treated, unidirectional, and continuous non-alkali glass fiber yarn. This binding material has good softness and stickiness, easy unwinding, no loose threads, no overlapping marks. The product has excellent properties such as high strength, impact resistance, high modulus, low derivative, no hysteresis and no eddy current loss, and is an ideal binding material for motors, transformers and lightning protection materials. [0003] The traditional latitude-free tape has high resistance. After the iron core is bound, if the iron core works ab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/06C08K13/04C08K7/14C08K3/34C08K3/36C08K3/26C08K5/098
CPCC08K13/04C08K7/14C08K3/346C08K3/36C08K3/26C08K5/098C08K2003/265C08K2201/014C08L67/06
Inventor 马继
Owner 马继
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