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

On-line repairing method for weld defects of in-service GIS shell of transformer substation

A repair method and substation technology, applied in the electric power field, can solve problems such as uncontrollable air leakage, lack of SF6 gas, and reduce operation and maintenance costs, and achieve the effects of improving efficiency and economy, good fatigue resistance, and reducing corrosion effects.

Pending Publication Date: 2021-07-27
ELECTRIC POWER SCI RES INST OF STATE GRID XINJIANG ELECTRIC POWER +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the leakage is large, because the air leakage rate is greater than the air supply rate, the pressure continues to drop, and the air leakage cannot be controlled, so the operation can only be forced to stop.
[0006] Therefore, for the treatment of the weld seam defects of these GIS shells in service, the existing technology lacks a way to solve the leakage of SF6 gas by repairing the method of metal glue on site, instead of dismantling and repairing the equipment, reducing operation and maintenance cost and long construction period

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
  • On-line repairing method for weld defects of in-service GIS shell of transformer substation
  • On-line repairing method for weld defects of in-service GIS shell of transformer substation
  • On-line repairing method for weld defects of in-service GIS shell of transformer substation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0060] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation.

[0061] Concrete implementation of the GIS shell surface mounted on the SF 6 Air pressure sensor, and GIS housing has SF 6 Infrared imaging leak detectors or laser imaging leak detectors, as well as portable digital ray detectors and ultrasonic flaw detectors.

[0062] The main body of the concrete GIS housing is a straight cylinder in the middle, symmetrical flanges are arranged at both ends of the straight cylinder, and there are girth welds and straight welds on the surface.

[0063] Such as figure 1 Shown, embodiment of the present invention and implementation thereof are as follows:

[0064] Defect location in step 1:

[0065] When the GIS equipment is running, a gas pressure sensor is installed in the inner cavity of the GIS shell, and the gas pressure sensor detects the air pressure, and then detects the SF 6 Whether the gas is le...

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 strengthaaaaaaaaaa
shear strengthaaaaaaaaaa
compressive strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses an on-line repairing method for weld defects of an in-service GIS shell of a transformer substation. The method comprises the following steps: detecting an SF6 gas pressure leakage alarm signal in the operation process of the GIS equipment, and finding a gas leakage area of the GIS shell on site; in the vicinity of the gas leakage area, measuring the direction and the size of the weld defect by using an ultrasonic flaw detector; carrying out finite element modeling, analysis and calculation on the GIS shell and then carrying out defect safety evaluation; marking welding seam defects, and performing groove treatment; filling the groove is filled with metal glue, and trimming the surface appearance to be consistent with the surface of the weld joint; and applying a reinforcing plate to the weld defects for reinforcing and repairing. According to the on-line repairing method, gas leakage defect treatment can be completed on the premise that equipment is not disassembled, normal operation of the equipment is not affected, and the efficiency and economical efficiency of gas leakage defect treatment are remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of electric power and relates to a method for repairing an in-service GIS shell, in particular to an online repair method for weld defects of a GIS shell by using metal glue. Background technique [0002] Gas Insulated Switchgear (GIS for short) has been widely used in the power industry because of its small footprint, compact structure, short installation period, high reliability, and long maintenance period. When GIS equipment is in use, it needs to fill the SF with a certain pressure (generally greater than 0.3MPa) inside the metal shell. 6 Gas is used as insulation and arc extinguishing medium, according to the maintenance requirements of power grid equipment, SF 6 The annual air leakage rate should be less than 1%. [0003] However, during the operation of GIS equipment, due to the quality defects of the GIS metal shell and the influence of the operating environment, gas leakage often occurs, making t...

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 Applications(China)
IPC IPC(8): H02B3/00B23P6/04
CPCH02B3/00B23P6/04
Inventor 王欣欣庄凌志魏燕定王开科赵普志李洪渊高荣刚赵建平郑义杨利民杨柱石王宗江陈东娃
Owner ELECTRIC POWER SCI RES INST OF STATE GRID XINJIANG ELECTRIC POWER
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