Automatic detection system for spiral/longitudinal submerged arc welded pipe by using phased array technology

Abstract

The invention discloses an automatic detection system for a spiral / longitudinal submerged arc welded pipe by using a phased array technology. The system comprises a detection mechanical subsystem, anelectrical control subsystem, an automatic weld joint tracking system and a data processing subsystem. The data processing subsystem is composed of a phased array ultrasonic signal transmitting and collecting part and a computer, and the invention relates to the technical field of welded pipe detection. According to the automatic detection system for the spiral / longitudinal submerged arc welded pipe by using the phased array technology, the automation degree and the detection precision of the spiral / longitudinal submerged arc welded pipe quality detection system can be greatly improved, and compensation is achieved through the intelligent visual tracking system so that the purpose of automatic screening nondestructive testing of pipe weld defects is achieved, the production quality of spiral / longitudinal submerged arc welded pipes is well guaranteed, the workload of production personnel is reduced, the production efficiency is improved, and thus the production of the spiral / longitudinal submerged arc welded pipes is quite facilitated.

Description

technical field [0001] The invention relates to the technical field of welded pipe detection, in particular to an automatic detection system for spiral / longitudinal submerged arc welded pipes using phased array technology. Background technique [0002] Spiral / LSAW steel pipes can produce welded pipes with larger diameters from narrower blanks, and welded pipes with different diameters can also be produced from blanks with the same width. The production cost is low, the process is simple, and it is easy to produce large-diameter pipes. Large-diameter welded pipes mostly adopt the spiral seam submerged arc welding process. Spiral seam submerged arc welded steel pipes are generally used: welded into pipelines for fluid transportation, metal structures or pile foundations, etc., which are widely used in water supply projects, petrochemical industries, chemical industries, Electric power industry, agricultural irrigation and urban construction, used for liquid transportation: wat...

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Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides an automatic detection system for spiral / longitudinal submerged arc welded pipes using phased array technology, which solves the problem that the existing spiral / longitudinal submerged arc welded pipe quality detection system has a low degree of automation and The detection accuracy is small, and the angle of the sound beam for weld detection is single. It cannot be avoided that due to the welding deviation of the pipe and the rotation and sliding, there is a small deviation in the distance from the probe to the weld, which makes the flaw detection vehicle and the rotating roller out of step, and it takes more time to increase the wall thickness. A group of probe water bags can not identify the specific position of the defect in the weld, and cannot guarantee the production quality of the spiral / LSAW pipe, which greatly increases the workload of the production personnel and reduces the production efficiency.

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