Combined TOFD and phased array imaging scanner for weld of seal head for pressure vessel

Abstract

The invention relates to a combined TOFD and phased array imaging scanner for a weld of a seal head for a pressure vessel. The scanner comprises a main support composed of a front beam, a back beam, a left beam, a right beam and a middle beam; the front ends of the left beam and the right beam are respectively hinged with two ends of the front beam, the front part of the middle beam is in fixed connection with the middle part of the front beam, the back beam comprises a double-end screw which has symmetrical left and right sides, screw threads at a left part and a right part of the screw havedifferent spiral directions, the middle part of the screw is connected with the rear part of the middle beam, the screw threads at the left part and the right part of the screw are respectively spirally connected with a left nut and a right nut, the left and right nuts are connected with the rear ends of the left and right beams, and four corners of the main support are respectively provided witha magnetic wheel mechanism. The scanner provided in the invention is applicable to detection of circumferential welds of heads with different sizes for containers, enables a probe to always carry outdetection along a circular weld, ensures detection precision and supports weld detection of a plurality of workpieces like pipelines, butt flat plates, etc.

Description

technical field

[0001] The invention relates to a pressure vessel head combination weld seam TOFD and phased array imaging scanner, which is mainly used for the detection of circular seams of different sizes of heads of boilers and pressure vessels, and can also be used for straight seams and other circular seams detection. Background technique

[0002] Ultrasonic non-destructive testing instruments play an irreplaceable role in product quality testing and equipment safety performance inspection in many industrial fields. One of the important components is the mechanical scanner, which is used to carry the probe to move on the surface of the detected object. Realize the scan detection of the detected object. The existing mechanical scanner can only detect the linear weld on the plate or the weld on the pipeline, but it is powerless for the circular weld on the container head. In the case of operating its trajectory, it is difficult to use a scanner for detecting linear weld...

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