Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Epoxy glue impregnated paper casing capacitor core insulation performance test sample preparation method

A technology for the capacitance and insulation performance of bushings, which is applied in the measurement of electricity, measurement devices, and measurement of electrical variables, etc. It can solve the problem of the increase in the bubble content of the sample, the large difference between the content ratio of epoxy glue and crepe paper, and the inability of pressure and tension to be equivalent. and other issues to achieve a good effect of equivalence

Active Publication Date: 2022-05-17
EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
View PDF17 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the main problem of the high-temperature vacuum forming method is that there is no tension control during the forming process, and the stretched state of the wrinkles is quite different from the actual capacitor core. At the same time, the content ratio of epoxy glue to crepe paper is also quite different. The actual insulation is quite different
In addition, the main problem for high-temperature compression molding is that there is no vacuum environment during the molding process and the force is pressure
Molding without a vacuum environment will lead to a significant increase in the bubble content inside the sample, and the insulation will change. In addition, the external pressure and tensile force cannot be equivalent to the force mode.
To sum up, the current methods for preparing samples for testing the insulation performance of epoxy glue-impregnated paper bushing capacitor cores have certain limitations, and the prepared test samples cannot be equivalent to the insulation material of the original bushing capacitor core.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Epoxy glue impregnated paper casing capacitor core insulation performance test sample preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0028] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0029] This embodiment provides a method for preparing samples for insulation performance testing of epoxy glue-impregnated paper casing capacitor cores. The main steps include: ①crepe paper winding, ②epoxy impregnation, ③vacuum curing, ④axial slicing, ⑤ Surface treatment, ⑥ surface electrode spraying.

[0030] ①Crinkle paper winding, under the condition of fixed tension, take the cylindrical rod as the axis, wind the crepe paper clockwise or counterclockwise on the outside of the cylindrical rod at a constant speed, until the diameter meets the requirements, stop the winding of the crepe paper and fix it The outermost layer of crepe paper to prevent loosening. The tensile force is not less than 100N, and the paper wrinkle / epoxy glue content ratio can be controlled by the magnitude of the tensile force; the diameter of the ro...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
tensile loadaaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing samples for insulation performance testing of epoxy glue-impregnated paper casing capacitor cores. The main steps include: winding of crepe paper, epoxy impregnation, vacuum curing, axial slicing, surface treatment, surface electrode spraying, etc. Step, the sample prepared by this method is equivalent to the insulation material of the real bushing capacitor core, so the test result is closer to the real insulation performance of the insulation material.

Description

technical field [0001] The invention relates to the field of electrical insulation testing, in particular to a method for preparing samples for insulation performance testing of epoxy glue-impregnated paper casing capacitor cores. Background technique [0002] High-voltage bushings are used in power transmission and transformation projects to pass current-carrying conductors through metal boxes or valve hall walls of equipment with different potentials, to introduce or lead out full voltage and full current, and to function as insulation and mechanical support. , pulling force, vibration, wind force, atmospheric pollution and other comprehensive effects, integrating electricity, heat, force, environment and other factors into one, the operating conditions are extremely harsh, and the operating reliability is directly related to the operation safety of the large power grid. It is one of the key equipment for the safe and stable operation of the power system. Epoxy resin impr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/20
CPCG01R31/20
Inventor 张晋寅韦晓星邓军周海滨谢志成潘志城刘青松
Owner EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com