Steel tube broadband magnet yoke flaw detection method and apparatus thereof

A technology of flaw detection and magnetic yoke, which is applied in the direction of material magnetic variables, etc., to achieve high work efficiency, high precision and good results

Inactive Publication Date: 2013-11-27
SHEYANG SAIFU NDT EQUIP MFG
View PDF11 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

but there is still

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
  • Steel tube broadband magnet yoke flaw detection method and apparatus thereof
  • Steel tube broadband magnet yoke flaw detection method and apparatus thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0014] As shown in the figure, the magnetic yoke includes the U-shaped main iron core 1, the guide iron core 2, the magnetic rubber 3, the steel pipe 4, the coil 5, the vertical section 1-1 of the U-shaped main iron core, and the horizontal section of the U-shaped main iron core. Segment 1-2, connecting piece 6.

[0015] A wide-band magnetic yoke detection method for steel pipes. The magnetization unit flows alternating current as the excitation current to apply to the yoke, the yoke contacts the surface of the steel pipe, the magnetization zone of the steel pipe is sprayed by a magnetic powder sprayer, and the image acquisition device sprays the steel pipe with magnetic powder The shower area is collected, and the image collection device includes a camera and a light source; the light source is an ultraviolet lamp. Including a magnetization unit, the magnetization unit includes a magnetization power supply and a yoke. The yoke includes a U-shaped main iron core, a guide iron cor...

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
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

A steel tube broadband magnet yoke flaw detection method is characterized in that an AC current is circulated on a magnetization unit and is applied to a magnet yoke as an exciting current, the magnet yoke contacts with the surface of a steel tube, the magnetized area magnetic powder liquid spray thrower of the steel tube sprays, an image acquisition device acquires the magnetic powder spray area of the steel tube, and the image acquisition device comprises a camera and a light source; the magnetization unit comprises a magnetization power supply and the magnet yoke, the magnet yoke comprises a U-shaped main iron core and a guiding iron core, a difference between the cross-sectional area of the main iron core and the cross-sectional area of the guiding iron core is less than 20% of the total area of the main iron core and the guiding iron core, at least two coils are arranged, at least one coil is wound on the two arms of the U0shaped main iron core, and the coils have a same connecting direction; and the end portion of the guiding iron core is bonded with magnetic rubber having a thickness of 3-20mm, the magnetic rubber is parallel to the cross section of the guiding iron core, and the area of the magnetic rubber is above 150% of the cross-sectional area of the guiding iron core.

Description

technical field [0001] The invention relates to a magnetic flaw detection method and a magnetic flaw detection device, in particular to a method and a device for automatic detection of broadband yoke flaw detection of steel pipes. Background technique [0002] Steel pipes and (steel rods) are bulk products that need to be tested, and each steel pipe or steel rod needs to be tested. The existing technology such as CN200980117371 provides a magnetic flaw detection method and a magnetic flaw detection device. The magnetic flaw detection device has: circumferential induction magnetization The compound magnetization unit and the longitudinal induction magnetization unit use the phase relationship of 120 degrees of the three-phase power supply to form a rotating magnetic field and act on the workpiece to be inspected; the detection unit detects the flaw detection signal; and the signal processing unit implements the flaw detection signal signal processing. The magnetizing unit fl...

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
IPC IPC(8): G01N27/84
Inventor 杨建陈志华夏树新崇庆高杨乾明
Owner SHEYANG SAIFU NDT EQUIP MFG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap