Multifunction electromagnetic flaw detection device

Abstract

The invention relates to a combination electromagnetism explore injure equipment, it includes sensor, its feature is that it also includes bearing installed on the pipe, bar straightener, supporting axle, supporting roller armed with envelope curve rolling curve and sensor supporting, of which supporting axle installed on the bearing, supporting roller installed on the supporting axle, bearing fixed on the dead plate, arc slot set on the bearing and dead plate relative position and dent into bolt fastening, one end of sensor supporting through the through hole of bearing center and connect with the screw-thread hole of the dead plate center, the other end of sensor supporting connect with the sensor which installed between the both sides supporting roller, supporting sleeve covered sensor supporting and dead connect with bearing, transverse hole installed on the supporting sleeve bottom, one end of supporting axle cantilever reeve through the hole. The invention characteristics is that it could improve measurement precision and accuracy, which integrates a entire with explore injure function and straightening function, the invention could be used on the pipe or bar or sheet or section steel straightening machine production line.

Description

technical field [0001] The invention relates to an electromagnetic non-destructive testing device, in particular to a multifunctional electromagnetic testing device which can protect the sensor from wear and has the function of correcting the magnetically permeable material to be measured. It is an improvement to the structure of the existing electromagnetic non-destructive testing device and belongs to The technical field of testing or analyzing the presence of defects in materials by electrical, electrochemical or magnetic methods in the IPC International Patent Classification. Background technique [0002] For all kinds of magnetically conductive pipe and bar products, in order to ensure product quality, flaw detection is generally required. Electromagnetic non-destructive testing is a commonly used testing method, such as the Chinese utility model patent No. CN2289240 "Steel Electromagnetic Flaw Detector" And the Chinese invention patent application with publication numb...

AI Technical Summary

Problems solved by technology

However, there are still some problems in actual operation: the constant problem of the signal lift-off distance; the constant problem of the included angle β between the detection plane of the detection element and the axis of the tube and bar to be tested, etc.

These problems are mainly caused by the unreasonable design of the mechanical structure, which causes serious wear of the sensor, so the design of the sensor fixing mechanism is particularly critical

[0003] The axial direction of the sensor is generally designed as a circular arc. Under the action of the compression spring or the hydraulic (pneumatic) cylinder, the inner circular surface of the sensor is closely attached to the surface of the tube and bar, and the surface of the sensor is constantly worn during detection. , the signal lift-off distance keeps decreasing, which will lead to a strong change in the sensitivity of flaw detection. For the same defect, the peak value of the defect detection signal gradually increases, which is very different from the initial detection value, resulting in inaccurate detection data. Sensor life

[0004] In addition, there are also some flaw detection devices that allow the tube and bar to be fed in a straight line at a certain speed, and the sensor rotates around the axis of the tube and bar. The problem with this flaw detection device is that it is difficult to control the stability of the movement of the tube and bar. , it is difficult to ensure that the rotation centerline of the sensor coincides with the axis centerline of the tube and bar, which affects the detection accuracy

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