Bent steel tube automatic flaw detection system based on ultrasonic detection

Abstract

The invention discloses a bent steel tube automatic flaw detection system based on ultrasonic detection, which comprises a bent tube feeding mechanism and two bent tube ultrasonic detection mechanisms, wherein the bent tube feeding mechanism is composed of a set of drive retainers, wherein each drive retainer is composed of a drive roller, a support roller, a motor mounting rack, a support roller mounting rack, a support roller guide rail rack and a drive roller mounting rack; and each bent tube ultrasonic detection mechanism comprises a vertical slide guide rail rack, a detection slider, a trapezoidal screw rod, a screw rod motor coupling, a detection servomotor, a pneumatic telescopic link, an ultrasonic probe rack winding tube rotation mechanism and a chain-type ultrasonic probe rack. According to the method, the bent tube is fed in the axial direction, and the ultrasonic probe moves in the circumferential direction of the bent tube to perform the full surface flaw detection so as to implement ultrasonic automatic flaw detection on the large-diameter bent steel tube, thereby effectively enhancing the accuracy and efficiency of the bent steel tube nondestructive flaw detection and lowering the detection labor intensity of the workers.

Description

Technical field [0001] The invention relates to an automatic flaw detection system for curved steel pipes, in particular to an automatic flaw detection system for curved steel pipes based on ultrasonic detection. Background technique [0002] Bent steel pipes are an important part of long oil and gas transportation pipelines. Long-distance pipelines pass through many areas with complex terrain and harsh weather conditions. Therefore, large-diameter hot simmering elbows are required in pipeline laying. In the past 20 years, bent pipes have been increasingly used in large-diameter, high-pressure oil and gas pipelines at home and abroad. The application research of large-diameter, thick-walled, low-temperature, and high-pressure elbow pipes suitable for different working conditions is also intensified, and some engineering application results have been obtained, and the application fields of elbow pipes are becoming more and more extensive. [0003] The stress state of the elbow in u...

AI Technical Summary

Problems solved by technology

The current detection system can carry out automatic continuous and jog flaw detection on straight pipes. However, for a long time, in the relevant domestic oil pipeline production industry, the non-destructive testing of bent pipes has basically been carried out manually. After the magnetic particle inspection, the portable ultrasonic detector is used for inspection. The inspection results of the bent pipe are still based on experience and various charts. Not only is the process cumbersome, the workload is heavy, and the inspection efficiency is low. There are also certain misjudgments in the timely discovery

The traditional manual detection methods and detection instruments for curved pipes cannot meet the large-scale production requirements of large-caliber curved pipes in terms of detection speed and detection accuracy. Therefore, it is very necessary to develop a large-scale bend pipe ultrasonic automatic non-destructive testing system

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