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Multi-array coil eddy current probe and switching device

A technology of eddy current probes and array coils, which is applied in the field of eddy current probes to achieve the effects of preventing noise, improving reliability and saving manufacturing costs

Inactive Publication Date: 2018-12-21
KOREA HYDRO & NUCLEAR POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] In addition, the problem to be solved by the present invention is that the switching device in the array type eddy current testing system is designed and manufactured as a single module of the eddy current probe independent of the array coil, so as to reduce the manufacturing cost of the eddy current probe as a consumable and make the slip ring The number of channels is minimized, which saves its manufacturing cost and prevents noise

Method used

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  • Multi-array coil eddy current probe and switching device
  • Multi-array coil eddy current probe and switching device
  • Multi-array coil eddy current probe and switching device

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Embodiment Construction

[0046] Hereinafter, the present invention will be described in detail.

[0047] The array type eddy current probe capable of inspecting tubes of heat exchangers according to the present invention has transmission and circumferential inspection coils formed in a rectangular shape in the axial direction to increase crack detection sensitivity in the circumferential direction.

[0048] In the configuration of the array type eddy current inspection system, the eddy current probe of the array coil and the switching device are separated independently from each other, and the switching device is arranged between the array type eddy current probe and the slip ring to reduce the number of channels of the slip ring.

[0049] Such as figure 2 As shown, since the probe inserter for inserting / extracting the probe is equipped with a rotating part, a slip ring is required to connect the probe to the eddy current inspection equipment. However, slip rings with multiple channels are expensive...

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Abstract

The present invention relates to a method for designing safety buses in consideration of common cause failures, in which various design schemes are applied to safety-related buses, and a safety bus connected to an emergency diesel generator and a safety bus connected to an alternate alternating current generator are arranged to be completely separated, thereby considering the common cause failuresof the buses themselves and ensuring the diversity of an emergency power source. Accordingly, even if a common cause failure of the safety bus occurs, the safety bus is designed to supply power to anessential load necessary for a safety shutdown of a powerplant through the alternate alternating current generator, and an effect can be obtained such that as the safety buses connected to the emergency diesel generator and the alternate alternating current generator are separated from each other, the load is divided, thereby reducing the capacity of the alternate alternating current generator.

Description

technical field [0001] The eddy current probe 200 of the array coil of the present invention includes eddy current coils, which are densely arranged in the circumferential direction in the form of two rows, and the interval between the two rows is kept constant, which has the functions of sending and receiving on the circumference The coil 210 is formed in a rectangular shape, and the axial detection coil 220 is formed in a circular shape. The present invention relates to an eddy current probe with multi-array coils and a switching device, which can increase the overlap of eddy current regions in the axial direction for inspection in the circumferential direction, so that by forming the eddy current coils into a rectangular shape, the axial direction The length is longer than the existing circular shape to increase the feed speed of the probe. Background technique [0002] The present invention relates to an array type eddy current probe that can be used to diagnose the int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/90
CPCG01N27/90G01N27/9013G01N27/9046F28F2200/005
Inventor 李泰勋赵灿熙尹炳植刘贤珠李东珍
Owner KOREA HYDRO & NUCLEAR POWER CO LTD
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