Online nondestructive flaw detector for pressure pipeline detection

Abstract

The invention discloses an online nondestructive flaw detector for pressure pipeline detection in the technical field of pipeline flaw detection, and the online nondestructive flaw detector comprises a fixing ring, the interior of the fixing ring is connected with a driving mechanism for driving the fixing ring to move along a pipeline, and the driving mechanism can move along pipelines with different diameters; when the pipeline is subjected to flaw detection every time, the driving mechanism and the adjusting mechanism are used for detecting the diameter of the self-adaptive pipeline, the driving mechanism can meet the driving effect on pipelines with different diameters, and the adjusting mechanism can adjust the distance between the flaw detector and the outer surface of the pipeline; the flaw detector can accurately detect cracks in the pipeline, the rotating mechanism is used for driving the flaw detector to conduct circumferential rotation flaw detection, full-coverage flaw detection is conducted on the outer surface of the pipeline, detection is more accurate, the controller is used for controlling the driving mechanism and the rotating mechanism in a staggered mode, and segmented intermittent flaw detection is automatically achieved.

Description

technical field [0001] The invention relates to the technical field of pipeline flaw detection, in particular to an online non-destructive flaw detector for pressure pipeline detection. Background technique [0002] After the metal pipe is formed and the weld seam after the pipe is welded, non-destructive testing is required to check whether there are cracks and impurities in the metal pipe and the weld seam, which is an important inspection process. Ultrasonic flaw detection (PT flaw detection for short) is used more extensive. [0003] In the prior art, when performing ultrasonic flaw detection on pipelines, since the pipeline is cylindrical and usually the length of the pipeline to be detected is long, it is cumbersome, time-consuming and labor-intensive for personnel to use flaw detectors to detect the flaws of the pipeline point by point, and the flaw detection position is difficult. Accurate grasping results in that some parts with cracks cannot be accurately detected...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide an on-line non-destructive flaw detector for pressure pipeline detection, to solve the problems in the prior art when ultrasonic flaw detection of pipelines is proposed in the above background technology, because the pipeline is cylindrical and usually needs to be detected. When the length of the pipeline is long, it is cumbersome, time-consuming and labor-intensive for personnel to use flaw detectors to detect the flaws of the pipeline point by point, and it is difficult to accurately grasp the flaw detection position, resulting in some cracked parts not being accurately detected, and the detection accuracy is insufficient. The detector cannot make corresponding changes to the change of the diameter of the pipeline, which makes the detection accuracy of the pipeline insufficient

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