Ultrasonic detection system and detection method for thick-wall pipes

A detection system and detection method technology, applied in the field of ultrasonic detection

Pending Publication Date: 2022-01-04
AECC AVIATION POWER CO LTD
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to provide an ultrasonic detection system and detection method for thick-walled pipes, which solves the problem that the existing ultrasonic detection methods cannot be applied to thick-walled pipes.

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  • Ultrasonic detection system and detection method for thick-wall pipes
  • Ultrasonic detection system and detection method for thick-wall pipes
  • Ultrasonic detection system and detection method for thick-wall pipes

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Embodiment Construction

[0039] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0040] Ultrasonic testing is mainly divided into direct sound beam method (longitudinal wave) and oblique sound beam method (shear wave). Longitudinal wave is suitable for detecting defects parallel to the detection surface, and shear wave is used to detect defects with a large inclination angle to the detection surface.

[0041] There are two main types of defect directions in pipes: axial and radial. Axial defects are approximately parallel to the pipe axis, radial defects are perpendicular to the pipe axis, and axial defects are more harmful. In general, due to the processing technology, the defects of the pipe are mainly axial extension cracks.

[0042] Ultrasonic oblique incidence shear wave method has high sensitivity to axial defect detection, and can detect and identify inner and out...

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Abstract

The invention belongs to the technical field of ultrasonic detection, and discloses an ultrasonic detection system for thick-wall pipes. The system comprises a transverse wave reference block, a transverse wave detection probe, a longitudinal wave reference block and a longitudinal wave detection probe; U-shaped grooves are formed in the inner wall and the outer wall of the transverse wave reference block; a round hole is formed in one end of the longitudinal wave reference block; and a double-crystal probe is adopted as the longitudinal wave detection probe; and the transverse wave detection probe is a transverse wave probe with a curvature wedge block, and the curvature radius of the curvature wedge block is matched with the radius of a pipe to be detected. The invention further discloses a detection method; and longitudinal wave flaw detection is added on the basis of transverse waves, so that the detection sensitivity and resolution of the thick-wall pipe are improved. According to the detection method that the pipe is in direct contact with the probe, because no water layer attenuation exists between the probe and the pipe, scattering and absorption of sound waves in water can be effectively reduced, the sensitivity of pipe detection is improved, and the method is particularly suitable for high-sensitivity detection of large-specification pipes.

Description

technical field [0001] The invention relates to the technical field of ultrasonic detection, in particular to an ultrasonic detection system and detection method for thick-walled pipes. Background technique [0002] An aero-engine air duct has no large-scale pipe (maximum diameter Ф175mm) manufacturing supplier in the early stage, and the raw material is supplied in the form of forging. In recent years, domestic manufacturers have been able to produce large-scale pipes. In order to reduce raw material consumption and production costs, the raw material of an air duct for an aero-engine has been changed from rods to thick-walled TC11 titanium alloy pipes for direct processing. The processing process of thick-walled pipes Different from the rod forming mechanism, stretching and calendering cause radial and axial stress in the material, and the orientation of defects is more complicated than that of rods. Generally, the wall thickness of the pipe is thin, and the ultrasonic tes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B17/02
CPCG01B17/02
Inventor 何喜张浩喆王婵周文博赵娜董瑞琴荆砚冯青
Owner AECC AVIATION POWER CO LTD
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