Ultrasonic detection scanner for welding joint of double-channel bent tube

Abstract

The invention provides a multifunctional double-channel welding line ultrasonic testing scanner. The multifunctional double-channel welding line ultrasonic testing scanner comprises a whole sliding main supporting rod, a filter, a junction box, a handle, a digital encoder, a magnetic wheel set, two corresponding TOFD (Time Of Flight Diffraction) probe systems and two corresponding creeping wave probe supporting systems. The scanner has the advantages that firstly, the distance between transverse magnetic wheels is small to be applicable to adjusting a large-range curvature so that the scanner can be used for detecting an elbow welding line with a small diameter; secondly, after the upper-lower displacement of a probe bracket is increased, the scanner can be applicable to scanning butt welding lines of an elbow and large and small heads; thirdly, a probe wedge block is reduced so as to be more applicable to detecting an elbow welding opening; fourthly, a slope climbing probe is mounted so as to carry out once scanning on the dead zone of a scanning surface and improve the working efficiency.

Description

technical field [0001] The invention relates to an ultrasonic detection scanner, in particular to a dual-channel elbow weld seam ultrasonic detection scanner. Background technique [0002] At present, in the installation and construction of refining and chemical equipment, the amount of non-destructive testing of butt girth welds of large thick-walled and large-diameter pressure pipes is increasing; using A-type pulse ultrasonic testing, the defect display is not intuitive, and the defect shape cannot be displayed. And defect measurement is greatly affected by human factors, and the repeatability of defect detection and evaluation is poor; X-ray detection is more and more difficult or even impossible to detect (insufficient penetration); gamma-ray detection is difficult for safety protection (some places are not allowed to use), detection The time is long, the detection time is limited, and the half-life is short. Therefore, not only the cost is high, the sensitivity is low,...

AI Technical Summary

Problems solved by technology

[0014] However, the existing scanning device is only suitable for the detection of container butt welds, and the scanner has the following aspects which are not suitable for the detection of pipe butt welds with large curvature

First, the distance between the transverse magnetic wheels of the scanner is large, which is not suitable for large-scale curvature adjustment; second, the vertical displacement of the probe bracket is small, which is not suitable for scanning elbows and butt welds of large and small ends; third, the probe wedge Larger ones are not suitable for the detection of elbow welds; fourth, climbing probes cannot be installed, and a scan cannot be performed on the blind area of ​​the scanning surface; The equipment is very inconvenient; Fourth, for the detection of elbow welds, the HS810 portable TOFD dual-channel ultrasonic detector is powerless

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