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Eddy current array probe suitable for angular part inspection

A technology of array probes and angled parts, which is applied in the direction of measuring devices, material analysis through electromagnetic means, instruments, etc., to achieve the effect of effective inspection

Pending Publication Date: 2021-10-29
RES INST OF NUCLEAR POWER OPERATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The array probe structure designed in this patent aims to solve the surface or near-surface inspection of the root area of ​​the structural member similar to the L-shaped butt weld of the cladding flap during the actual inspection process

Method used

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  • Eddy current array probe suitable for angular part inspection
  • Eddy current array probe suitable for angular part inspection
  • Eddy current array probe suitable for angular part inspection

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Embodiment Construction

[0018] Combining with the above illustrations, the design and implementation of the probe will be described in detail.

[0019] Such as figure 1 Shown is the overall schematic of the probe. The installation grooves of the shaft-wound excitation coil 1 and the close-packed point-type receiving coil 4 are machined on the two interface surfaces of non-conductive and magnetically conductive hard materials, and the above-mentioned coils are fixed in the grooves by gluing. As the coil shown in the figure, two parallel shaft-wound excitation coils 1 are arranged on both sides of the close-packed point-type receiving coil 4, and the middle of the close-packed point-type receiving coil 4 is misplaced. Both coils are copper enameled wires. Manufactured, the diameter of the copper enameled wire of the shaft-wound excitation coil 1 is between 0.3 mm and 1 mm. The diameter of the copper enameled wire of the close-packed dot receiving coil 4 is between 0.03 mm and 0.1 mm.

[0020] Such a...

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Abstract

The invention relates to the field of nondestructive testing, in particular to an eddy current array probe suitable for angular part inspection. The probe can be used for placing shaft-wound exciting coils, densely-arranged point-type receiving coils, shaft-wound exciting coils on two sides and densely-arranged point-type receiving coils which are arranged in a staggered manner in the middle; the diameter of a copper enamelled wire of the shaft-wound exciting coil is between 0.3 mm and 1 mm; and the diameter of the copper enameled wires of the densely-arranged point type receiving coils is between 0.03 mm and 0.1 mm. According to the probe, the inspection of the vertical part and the horizontal part of the L-shaped area can be well realized; through switching of excitation modes of the shaft-wound coil and the point-type coil, effective inspection of different orientation defects is realized.

Description

technical field [0001] The invention relates to the field of non-destructive testing, in particular to an eddy current array probe suitable for angle piece inspection. Background technique [0002] During the surface or near-surface inspection of nuclear-grade or non-nuclear-grade special-shaped structural parts of nuclear power systems, some nuclear-grade and non-nuclear-grade special-shaped structural parts exist in pressure-bearing and non-pressure-bearing positions. For example, the steel cladding of storage fuel pools and tanks in typical areas is actually a layer of thin stainless steel plates, called cladding plates. The cladding plates are spliced ​​together by welding to cover the entire inner wall. Due to the high radioactivity of spent fuel, if there is a quality problem in the welding seam between the cladding plates, radioactive substances may leak after a period of time, which will endanger the safety of the nuclear power plant. Therefore, it is necessary to ch...

Claims

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Application Information

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IPC IPC(8): G01N27/904
CPCG01N27/9006G01N27/904
Inventor 张耀祁攀向池新吴保庚刘杨
Owner RES INST OF NUCLEAR POWER OPERATION
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