An Ultrasonic Scanner for Butt Longitudinal Welds

Abstract

The invention discloses an ultrasonic scanner for butt longitudinal welds, comprising: a frame, the frame has an accommodating space; a probe mechanism, arranged in the accommodating space, for fixing the ultrasonic probe; a limit sliding mechanism, arranged in the accommodating space The bottom inside the frame is used to slidably fix the ultrasonic scanner on the butt longitudinal weld to be scanned, and the limit sliding mechanism includes a first limit roller unit and a second limit roller unit. Due to the ultrasonic scanner provided by the embodiment of the present invention, the ultrasonic scanner can be clamped on the butt longitudinal weld through the first limiting roller unit and the second roller unit in the limiting sliding mechanism, and the limit is ensured by springs respectively. Position rollers are used to provide a good limit ability, and then the ultrasonic probe is carried by the probe mechanism to realize the scanning of the butt longitudinal weld, which meets the needs of the ultrasonic scanner for scanning the butt longitudinal weld in the prior art.

Description

technical field [0001] The invention relates to the field of oil and gas storage and transportation, in particular to an ultrasonic scanner for butt longitudinal welds. Background technique [0002] In recent years, with the development of the economy, the pace of domestic long-distance oil and gas pipeline construction has been greatly accelerated. However, with the increase in service life, long-distance pipelines are inevitably damaged by natural or human factors, which has brought great harm to the safe operation of oil and gas pipelines. Therefore, the amount of pipeline repair and restoration works has also increased significantly. [0003] For welds formed during assembly and repair of oil and gas steel pipelines, commonly used non-destructive testing methods include radiographic testing, magnetic particle testing, penetrant testing and ultrasonic testing. Among them, magnetic particle testing requires that the material to be tested is a magnetic material and the tes...

AI Technical Summary

Problems solved by technology

Due to the limitation of the repair weld structure of in-service pipelines and its safety considerations, magnetic particle and penetrant can only detect defects on the surface and near the surface of the weld, while radiographic inspection is not suitable for the detection of in-service pipelines

[0004] For the internal defects of welds, ultrasonic testing method has been widely used in the field of oil and gas pipeline weld detection due to its detection accuracy, high safety, and simple operation. It is difficult to directly apply the ultrasonic testing method under these conditions to the detection of internal defects of butt longitudinal welds at pipe repair fixtures, and an ultrasonic scanner for scanning butt longitudinal welds is urgently needed

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