Supersonic and eddy composite automatic detector for pipe

Abstract

An automatic detecting device with combined ultrasonic and vortex flow for the material of bar and tube is composed of conveying mechanism and devices of detecting, detecting display, recording and automatic control, among which the conveying mechanism consists of motor, conveying roller way and three-wheel driver foring vortex detection line and vortex passing detection line, and the two lines are connected by driving and driven cone gears and universal coupling the detecting devices is composed of probe set, probe frame and probe water box, while the probe frame including adjusting mechanism, guide screw and sliding rail mechanism to be placed in the probe water box, and the probe set to be set on the probe frame outside the probe water box. A group of probes for longitudinal fault detection equiped with two ultrasonic water-dipped point focusing probes B and C, and a group of probes for transverse fault detection equioped with two ultrasonic water-dipped

Description

technical field [0001] The invention relates to a non-destructive testing technology, in particular to a pipe material ultrasonic and eddy current composite automatic testing device. Background technique [0002] A large number of tubes and rods are used in important industrial fields such as aerospace, aviation, nuclear power, ships, petrochemicals, and steel, especially many kinds of small-diameter thin-walled metal tubes. In addition to stainless steel, there are high-temperature alloy tubes, rare Metal pipes, high-strength steel pipes, etc. These pipes and bars are generally used in very harsh environmental conditions (such as: high temperature, high pressure, complex loads, water corrosion, nuclear radiation, etc.), once these workpieces fail, they will cause serious damage. Therefore, it is often required to perform defect-free operation (that is, not to allow any axial and circumferential macroscopic and microscopic defects exceeding the specified artificial injury eq...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, there are mainly three schemes for automatic ultrasonic flaw detection of pipes: 1) The pipe moves straight forward and the probe and a small water tank partially immersed in water rotate. False detection and missed detection, long-term probe rotation makes the probe loose, which will also cause false detection and missed detection. Generally, it is only suitable for longitudinal defect detection and not for horizontal defect detection. If the signal coupling of the rotating probe is contact type, there will be sparks. If the non-contact type is used, there will be signal attenuation; 2) The pipe rotates and the probe moves straight on the track, which has the characteristics of small space occupied by the equipment, but it is not suitable for the detection of pipes longer than the fuselage, and the beating of pipe rotation will cause false detection and missed detection; 3) The horse-riding structure scheme in which the pipe spirally advances and the probe is fixed on a V-shaped frame has the advantage of simple equipment structure, but the beating when the pipe spiral advances also causes false detection and missed detection, and also wears the probe frame. The improved version of this scheme is that the probe frame does not ride on the rotating pipe, but generally there is only one probe adjustment mechanism, which has less adjustment freedom, and is not suitable for forward and reverse bidirectional flaw detection of vertical and horizontal defects on the inner and outer walls.

[0004] The existing ultrasonic flaw detection and eddy current flaw detection often use two sets of equipment, the analog ultrasonic flaw detector and the eddy current flaw detector, which occupy a large area of ​​the workshop, and the test results recorded manually are highly subjective, and some detection devices are either expensive or have few functions. Either too complex or unreliable to meet the non-destructive testing requirements of the above-mentioned important industrial application areas

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