Medium/large-diameter pipe phased-array ultrasonic detection looped scanner

Abstract

The invention discloses a medium / large-diameter pipe phased-array ultrasonic detection looped scanner which comprises a chained elastic joint, a main bracket and a chained looped joint, wherein an inserted convex groove is formed in the front end of the chained elastic joint, a group of telescopic springs (18) is arranged in the middle of the chained elastic joint, and a plurality of groups of strip-shaped clamping grooves are formed in the upper surface of the rear of the chained elastic joint; the main bracket comprises a probe rack, a coder, a scale plate, a locator and a center position indicator; the probe rack is used for mounting a probe; inserted concave grooves which can be matched with the inserted convex groove are formed in the front and rear ends of the main bracket; the inserted concave grooves which can be matched with the inserted convex groove are formed in the front end and the tail end of the probe rack; the coder is fixed at one end of the main bracket; the scale plate is transversely arranged on the side face of the main bracket; the locator and the center position indicator are respectively arranged on the scale plate in a sliding manner; a loop is arranged atthe front end of the chained looped joint, and an inserted convex groove is formed in the tail end of the chained looped joint; and a plurality of groups of pulleys are mounted on the chained elasticjoint, the main bracket used for mounting the probe and the chained looped joint.

Description

technical field [0001] The invention belongs to welding detection technology, in particular to a ring type scanner for phased array ultrasonic detection of medium and large diameter pipelines. Background technique [0002] Phased array ultrasonic testing is a new type of non-destructive testing technology, which is being gradually popularized and applied due to its advantages of high defect detection rate and obvious effect. The difference between the phased array ultrasonic testing probe and the conventional ultrasonic testing probe is that the phased array ultrasonic testing probe needs to be installed with a scanning device and a displacement walking recording device, and the actual displacement of the probe is recorded by fixing it on the scanner. [0003] At present, conventional phased array ultrasonic testing scanners adopt a chain structure and a scanning frame structure with rollers. The chain structure is connected by a watch chain one by one, and the probe and th...

AI Technical Summary

Problems solved by technology

Large and medium-diameter pipes have large diameters and long circumferences, requiring multiple links and a large number of watch chains to assemble, which is economical and practical, and the efficiency is slow

[0006] 2. Roller-type simple scanning frame, the probe is unstable and easy to move

During the walking process, the displacement trajectory is easy to deviate, resulting in incomplete coverage of the scanning interface and poor accuracy of scanning data

[0007] 3. The existing simple scanning device, the displacement of the moving track is easy to change, causing the distance between the probe and the weld to deviate, and the scanning data cannot accurately reflect the actual situation

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