Device for detecting section tube damage by water immersion transverse wave method and damage detecting method thereof

Abstract

The invention discloses a device for detecting damage on an irregular pipe fitting by a water immersion transverse wave method and a damage detecting method thereof. The device consists of a probe moving component (1), an ultrasonic flaw detector (2), deionized water (3) and a water tank (5), wherein the probe moving component (1) is arranged at the top of the water tank (5) through four pulleys;the deionized water (3) is filled in the water tank (5); and a sensitive end of a point focusing probe (11) in the probe moving component (1) is placed in the deionized water (3) and is away from theirregular pipe fitting (4) for 10 to 20 millimeters. By adopting the water immersion transverse wave method, the point focusing probe (11) in the water tank (5) detects inward convex irregular pipe fittings and inward concave irregular pipe fittings. Through analyzing and discriminating signals, artificial defects with different depths and special step areas are distinguished and compared, and signal strength reduces along with reduction of the defect depth.

Description

technical field The present invention relates to an ultrasonic detection device and method, more particularly, a device for detecting damage to small-diameter thin-walled special-shaped pipe fittings with inner convex and inner concave by using the water immersion shear wave method, and a special-shaped pipe fitting damage detection method. Background technique Tubular materials are widely used in actual industrial production, such as seamless steel pipes, oil transportation pipelines, U-shaped steel pipes for ships, etc. After a certain period of operation, defects such as corrosion and fatigue cracks may appear, which will affect their scheduled function realization. The non-destructive testing technology is to test directly on the structure or drill a core sample inside it without destroying the structural components, to detect the internal quality of the structure, to estimate the strength and quality defects of the structure, and to use non-destructive testing. The de...

AI Technical Summary

Problems solved by technology

For example, fastener memory alloy pipe joints and boiler elbows in aircraft, if the problem cannot be found in time, it may cause catastrophic accidents in the service stage

However, in the current testing standards, only the testing of conventional-shaped pipes is required, which requires research on non-destructive testing methods for special-shaped pipes.

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