Moveable-feeding-mechanism-based ultrasonic flaw detection system for bent steel tubes

Abstract

The invention discloses a moveable-feeding-mechanism-based ultrasonic flaw detection system for bent steel tubes. The system comprises a moveable ring-shaped feeding mechanism, a set of hydraulic support frame which constitutes a bent tube holding base and two sets of ultrasonic detecting mechanisms for the bent steel tubes. The moveable ring-shaped feeding mechanism comprises a ring-shaped guide rail, internal gears, a feeding pneumatic telescopic link, a drive worm, a drive worm wheel, a drive link, a first electric motor mounting plate, adjusting tracks, a feeding servo motor, two roller mounting plates and two hydraulic support cylinders. The hydraulic support frame comprises a hydraulic cylinder, a hydraulic piston rod and a V-shaped support frame which is arranged on the hydraulic piston rod. Each set of the ultrasonic detecting mechanisms for bent steel tubes comprises a detecting servo motor, an external box body of a slewing mechanism, a drive gear, a gear shaft, a detecting pneumatic telescopic link, a chained ultrasonic probe frame mounting frame and a chained ultrasonic probe frame. According to the system, ultrasonic automatic flaw detection for large-aperture bent steel tubes can be realized, the precision and the efficiency of nondestructive tests for bent steel tubes are effectively improved and the detection labor intensity of workers is alleviated.

Description

technical field [0001] The invention relates to an ultrasonic automatic flaw detection system for curved steel pipes, in particular to an ultrasonic flaw detection system for curved steel pipes based on a mobile feeding mechanism. Background technique [0002] Bending steel pipes are an important part of long-distance oil and gas pipelines. Long-distance pipelines pass through many areas with complex terrain and harsh weather conditions. Therefore, large-diameter hot-simmered pipes need to be used in pipeline laying. In the past 20 years, elbows have been used more and more widely in large-diameter, high-pressure oil and gas transmission pipelines at home and abroad. The research on the application of large-diameter, thick-walled, low-temperature, and high-pressure pipe bends suitable for different working conditions is also deepening, and some engineering application results have been obtained, and the application fields of pipe bends are becoming more and more extensive. ...

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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