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Eddy current probe group and method for small-diameter pipe defect detection

An eddy current probe and defect detection technology, applied in the field of eddy current probe sets, can solve the problems of difficult design and manufacture, high cost, and achieve the effects of abundant circumferential information, high applicability, and guaranteed flexibility

Pending Publication Date: 2020-12-01
CGNPC INSPECTION TECH +4
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But it also has the disadvantages of difficulty in design and manufacture and high cost

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  • Eddy current probe group and method for small-diameter pipe defect detection
  • Eddy current probe group and method for small-diameter pipe defect detection
  • Eddy current probe group and method for small-diameter pipe defect detection

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Embodiment Construction

[0030] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art.

[0031] Such as Figure 1-2 As shown, the eddy current probe set for small-diameter tube defect detection includes: several centering eddy current skeleton probe assemblies 1 , multiple eccentric eddy current skeleton probe assemblies 2 and flexible connectors 3 .

[0032] Such as Figure 3-4 As shown, the centering eddy current frame probe assembly 1 is used for axial calibration, which includes a centering frame 11, a first excitation coil 12 and a first detection coil 13 wound on the centering frame 11, the first An excitation coil 12 is coaxial with the first detection coil 13 and the center frame 11;

[0033] Such as Figure 5-6 As shown, the eccentric eddy current frame probe assembly 2 forms a fan-shaped primary det...

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Abstract

The invention discloses an eddy current probe group for small-diameter pipe defect detection. The eddy current probe group comprises a plurality of centering eddy current framework probe assemblies for axial calibration, a plurality of eccentric eddy current framework probe assemblies which form a fan-shaped main detection area for the small-diameter pipe, wherein during scanning, after all the eccentric eddy current framework probe assemblies move in the axial direction of the small-diameter pipe, the areas scanned by the main detection area completely cover the inner side wall of the small-diameter pipe; and a flexible connecting piece. According to the invention, through design and combination of the centering eddy framework probe assemblies and the eccentric eddy framework probe assemblies, the cost is greatly reduced on the premise of ensuring the working efficiency of equipment, and the three-dimensional information of the defects of the inner wall of the pipe can be quickly andaccurately detected only by completely detecting a to-be-detected pipe once.

Description

technical field [0001] The invention relates to an eddy current probe group and a method for detecting small-diameter tube defects. Background technique [0002] Small-diameter pipes are widely used in various industrial fields such as energy and chemical industry. Due to the small diameter of the pipe, it is difficult to guarantee the manufacturing accuracy. After a period of service, its internal structure will inevitably suffer from damage such as macro and micro defects. Since the existence of damage will bring serious hidden dangers to the safe use of pipeline structures, it is particularly important to carry out regular inspection and evaluation. [0003] At this stage, for the detection of small-diameter pipes, the eddy current Bobbin probe detection method, the rotating probe detection method and the array probe detection method are routinely used. These three methods are based on the phenomenon of electromagnetic induction for defect detection. Eddy current Bob...

Claims

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Application Information

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IPC IPC(8): G01N27/90
CPCG01N27/904
Inventor 马强孔玉莹王小刚杨宏博丁伯愿李晓光赵磊顾欣陈小亮
Owner CGNPC INSPECTION TECH