Ultrasonic phased array automatic detection device for steel large-sized vertical type storage tank

Abstract

The invention discloses an ultrasonic phased array automatic detection device for a steel large-sized vertical type storage tank. A walking mechanism of the device comprises a walking frame mounted atthe top of a storage tank wall plate through left and right walking wheels in a rolling manner; an outer fixed frame is arranged on the outer side of the storage tank wall plate, and the upper end ofthe outer fixed frame is fixedly connected to the bottom of the walking frame; an inner fixed frame is arranged on the inner side of the storage tank wall plate, and the upper end of the inner fixedframe is fixedly connected to the bottom of the walking frame; left and right inner rollers on left and right inner protective arms of the inner fixed frame are in outwards rolling contact with the storage tank wall plate; left and right outer rollers on left and right outer protective arms of the outer fixed frame are in inwards rolling contact with the storage tank wall plate; an outer movable frame is mounted on the outer fixed frame through a first lifting mechanism, and a second lifting mechanism is arranged on the outer movable frame; a scanner is mounted on a reversing mechanism capableof converting transverse and longitudinal detection positions of the scanner; and the reversing mechanism is mounted on the second lifting mechanism through a left-right moving mechanism. The ultrasonic phased array automatic detection device disclosed by the invention can quickly and automatically perform ultrasonic phased array detection on a butt weld on the wall plate and is high in stabilityand easy to operate and maintain.

Description

technical field [0001] The invention relates to weld seam detection equipment, in particular to an ultrasonic phased array automatic detection device for large steel vertical storage tanks. Background technique [0002] Ultrasonic phased array testing is an important means of welding quality inspection of large vertical storage tanks, and it is also one of the important methods of non-destructive testing of pressure vessels. It can effectively avoid safety accidents caused by unqualified welding quality and ensure the safety of people's lives and property as well as the national economy. No loss. [0003] At present, in actual production, the traditional X-ray photography inspection is mainly used, that is, X-ray film photography technology, which forms an exposure latent image on the film after irradiating the inspected workpiece with X-rays, and records the weld seam after developing and fixing the film. Projection images, this detection method has a large radiation safet...

AI Technical Summary

Problems solved by technology

[0003] At present, in actual production, the traditional X-ray photography inspection is mainly used, that is, X-ray film photography technology, which forms an exposure latent image on the film after irradiating the inspected workpiece with X-rays, and records the weld seam after developing and fixing the film. Projection images, this detection method has a large radiation safety risk, and it is required to stagger the operation time with other processes and isolate the operation area to carry out the detection operation, and it has high labor intensity, low detection efficiency, and a long period of detection and evaluation procedures. And the negatives are not easy to save and other limitations

[0004] With the construction of Ni9 steel LNG storage depots and the continuous development of large-scale crude oil and refined oil storage depots in China, the application of a large number of automatic welding technologies makes traditional film photography unable to effectively meet the requirements of storage tank installation progress, thereby affecting the construction progress on site. Therefore, the application of ultrasonic phased array detection technology for storage tank butt weld detection is an effective method to solve the current problems

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