Laser distance measurement-source device for pipeline radiographic inspection

Abstract

The invention discloses a laser distance measurement-source device for pipeline radiographic inspection. The laser distance measurement-source device comprises a reflection board and an auxiliary collimation bracket; the reflection board is vertically fixed on a center shaft of a spider; the auxiliary collimation bracket is fixed at a pipeline opening; the auxiliary collimation bracket comprises an upper clamping piece and a lower clamping piece which are used for clamping the pipeline opening, and a bracket for mounting a distance measurement instrument; the upper clamping piece, the lower clamping piece and the bracket are fixed on a rail rack; the rail rack consists of two parallel rails; and the positions of the upper clamping piece, the lower clamping device and the bracket of the distance measurement instrument on the rail rack can be vertically adjusted up and down. When the laser distance measurement-source device provided by the invention carries out the radiographic inspection by means of being matched with the spider, a laser distance measurer used at the pipeline opening can monitor a range of the spider entering a pipeline in real time until a pre-set numerical value is reached. An area for laser projection in distance measurement can be increased through the reflection board; and the auxiliary collimation bracket arranged at the pipeline opening can ensure the laser distance measurer bracket to be stably arranged, so as to obtain a pre-set distance from a reflection face of the reflection board to the pipeline opening. Therefore, the measured distance is accurate and reliable, and the distance measurement source is accurately positioned.

Description

technical field [0001] The invention relates to pipeline internal flaw detection equipment, in particular to a laser distance measuring and matching source device for pipeline ray flaw detection. technical background [0002] For the interior of pipe weldments, many of them currently use the non-destructive testing method of ray testing for single-wall projection testing. The ray decays according to a certain rule during the process of penetrating the object, and the relationship between the attenuation degree and ray sensitivity or excited fluorescence can be inspected. Defects inside pipe weldments. [0003] However, when radiography is used, a crawler is usually used to send the radioactive source conduit into the weldment, and this method can ensure that the radioactive source is located on the axis of the pipeline. However, due to the small inner diameter of the pipe, the operator cannot observe whether the probe of the crawler is aligned with the girth weld section wh...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a laser ranging source alignment device for pipeline radiographic flaw detection, which can solve the problem of aligning the source at the weld section when using a crawler to send the radioactive source catheter into the weldment, and improve the exposure and photographing to obtain effective imaging. The success rate, while ensuring accurate positioning on the pipe girth weld section when arranging the radioactive source

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