Special-shaped tubular product adsorption type eddy current array probe

Abstract

The invention belongs to the technical field of application of nondestructive inspection of nuclear power equipment and in particular relates to an special-shaped tubular product adsorption type eddycurrent array probe. The invention provides a novel eddy current array probe mechanism on the basis of the prior art, aiming at structure characteristics and actual requirements of an outer sleeve ofa fast reactor core assembly; inner and outer wall eddy current array probes can implement detection at the same time; an inner wall scanning mechanical long rod system is cancelled and the efficiencyand flexibility of a detection system are improved. The special-shaped tubular product adsorption type eddy current array probe comprises the outer wall eddy current array probe and the inner wall eddy current array probe; the outer wall eddy current array probe is arranged on an outer wall of a hexagonal pipe; the inner wall eddy current array probe is arranged on an inner wall of the hexagonalpipe and mutually attracts the outer wall eddy current array probe through a magnet, so that the outer wall eddy current array probe and the inner wall eddy current array probe are tightly clung to the hexagonal pipe; meanwhile, the inner and outer walls of the hexagonal pipe are detected.

Description

technical field [0001] The invention belongs to the technical field of nondestructive inspection application of nuclear power equipment, and in particular relates to an adsorption-type eddy current array probe for special-shaped pipes. Background technique [0002] The outer sleeve of the core assembly, hereinafter referred to as the sleeve, is an important component of the fast reactor working in a high-temperature sodium medium environment, and it is also a safety barrier to prevent nuclear leakage. In order to ensure the safe and stable operation of the facility, the bushing needs to undergo non-destructive testing after production is completed. [0003] The shape of the casing is an equilateral hexagonal pipe structure, hereinafter referred to as the hexagonal pipe. It needs to be inspected from the outside and inside. It is required to be able to find defects such as cracks or wear on the surface and inner surface, and to find the position and size of the defect, and th...

AI Technical Summary

Problems solved by technology

The eddy current array probes on the inner and outer surfaces of the existing technology need to be installed on the outer wall scanning robot arm and the inner wall scanning mechanical long rod respectively. It is carried out on two systems, and the detection efficiency is low

In addition, the long rod of the inner wall scanning machine is driven axially into the hexagonal tube by the motor to drive the probe to scan axially. The length of the long rod has been fixed. If the length of the hexagonal tube is longer than the length of the long rod, inspection cannot be performed. The system low flexibility

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