NON-CONTACT LONGITUDINAL MAGNETIZING DEVICE FOR IN-PIPE DEFECTOSCOPY OF PIPELINES Russian patent published in 2021 - IPC G01N27/82 

FIELD: non-destructive testing.

SUBSTANCE: invention relates to non-destructive testing. Non-contact device for longitudinal magnetization for in-line inspection of pipelines contains a magnetic circuit having a middle section made in the form of a cylinder and end sections made in the form of truncated cones, while the sectional area of ​​the magnetic circuit decreases from the middle section to the smaller bases of the end sections, magnets located so that they surround the end sections of the magnetic circuit, and the inner surface of the magnets corresponds to the shape of the end sections of the magnetic circuit, and the magnets have magnetic induction vectors directed along the perpendicular or close to it relative to the contact surface of the magnetic circuit-magnet.

EFFECT: increased permeability in pipelines of small diameter while ensuring the level of magnetization of the pipeline material, sufficient for a qualitative examination of its inner and outer surfaces.

6 cl, 2 dwg