Rotary probe device of magnetic flux leakage flaw detection equipment

Abstract

The present invention relates to a rotary probe device of magnetic flux leakage flaw detection equipment, which comprises a machine body and a magnetic circuit guiding piece, a probe fixing device used for making contact with the outer surface of a to-be-detected workpiece is installed in the magnetic circuit guiding piece, and a probe is installed on the side, close to the workpiece, of the probefixing device; the probe fixing device comprises an adjusting mechanism, a supporting base, a balance weight mechanism, a two-force rod and an elastic fixing mechanism, the top of one right-angle side of the supporting base is rotationally connected with the balance weight mechanism, the end of the other right-angle side of the supporting base is rotationally connected with the bottom of the elastic fixing mechanism; one end of the two-force rod is rotationally connected with the elastic fixing mechanism and the other end of the two-force rod is rotationally connected with the balance weightmechanism; the middle of the two-force rod is elastically connected with the top of the supporting base through a traction spring. In the rotating process of the rotating shaft in the machine body, the probe is in contact with the outer surface of a workpiece by means of centrifugal force, and the accuracy of magnetic flux leakage detection is improved.

Description

technical field [0001] The invention relates to the technical field of magnetic flux leakage flaw detection equipment, in particular to a rotating probe device of the magnetic flux leakage flaw detection equipment. Background technique [0002] In the steel pipe rolling line magnetic flux leakage high-speed detection system, when the steel pipe passes through the rotating longitudinal defect detection area at a speed of 40-70m / min, the rotating circumferential magnetic field is emitted from one end of the magnetized pole shoe and passes through both sides of the pipe wall. side, to the other magnetized pole piece, and a closed loop is formed by the ring. Two sets of sensor arrays are distributed at the position perpendicular to the magnetized pole piece, which rotate around the steel pipe together with the magnetized pole piece, and scan the longitudinal defect leakage magnetic field in the pipe wall, and the defect signal formed has the characteristics of low noise, sensiti...

AI Technical Summary

Problems solved by technology

[0003] The magnetic flux leakage detection equipment mainly detects the quality defects in the pipe wall of the steel pipe workpiece through the probes installed with two sets of sensor arrays. However, during the detection process, when the magnetized pole piece rotates around the steel pipe workpiece for detection, the whole rotation process produces centrifugal force. The probe is easy to deviate from the outer surface of the steel pipe workpiece due to centrifugal force, resulting in inaccurate detection results

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