A magnetic flux leakage detection probe for variable-diameter steel pipes

Abstract

The invention is suitable for the technical field of non-destructive testing, and provides a new type of magnetic flux leakage detection probe for variable-diameter steel pipes. For the walking detection component, the adjacent detection sub-units are connected by the connector on the upper part, the arc-shaped plate and the fixing part on the lower part, so as to ensure the stability of the whole structure. In addition, among the two adjacent connectors, one of the connectors is hinged with the through hole of the arc-shaped plate, and the other connector is provided with a fastening screw, and the fastening screw is located in the arc-shaped groove. Under the condition that the sub-unit and the outer surface of the steel pipe are basically consistent, tightening the fastening screws can make the overall detection diameter of the probe remain unchanged during the detection process. Moreover, in the case of different pipe diameters, the center deviation of the plurality of detection sub-units is small, which ensures the accuracy of the detection results. In addition, the lower part of the detection sub-unit is directly connected to the shaft through the fixing member, which reduces the missed detection area between the magnetic bridges when the probe diameter is changed.

Description

technical field [0001] The invention belongs to the technical field of non-destructive testing, and in particular relates to a novel variable-diameter steel tube magnetic flux leakage detection probe. Background technique [0002] The safe operation of large-scale facilities is an issue of widespread concern in society. Steel pipes are widely used in electric power, petroleum, chemical, municipal and other industries. For these infrastructures, regular inspection and evaluation of steel pipes is a necessary measure to ensure their safety. [0003] After years of actual use and mutual verification of multiple detection technologies, the magnetic flux leakage detection technology has been widely accepted. The "NB / T 47013.1-2015 Nondestructive Testing of Pressure Equipment" standard issued by the state clearly lists the magnetic flux leakage testing methods. As a fast non-destructive testing method, magnetic flux leakage testing has its unique advantages. Fast detection spe...

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, the purpose of the present invention is to provide a new type of magnetic flux leakage detection probe for variable diameter steel pipes, aiming to solve the problems of poor structural stability of the existing magnetic flux leakage detectors on the outer wall of variable diameter pipes, different centers of subunits, and large missed detection widths. question

Images