DEVICE FOR IN-LINE DETERMINATION OF MECHANICAL STRESSES IN PIPELINE Russian patent published in 2022 - IPC G01N27/82 

FIELD: mechanical stresses determination.

SUBSTANCE: invention is intended for in-line determination of mechanical stresses in the pipeline. The substance of the invention lies in the fact that the device for in-line determination of mechanical stresses in the pipeline, made with the possibility of movement within the pipeline and characterized in that it contains a cylindrical body containing at least two coaxially arranged disks of non-ferromagnetic materials rigidly connected to each other and spaced at a distance L from each other; at least four probes with 3D gradiometer sensors configured to scan the inside of the tubular surface using the magnetic gradient tomography (MTM-G) method, wherein said four probes are rigidly fixed and coaxially oriented within the cylindrical body on said two coaxially arranged disks and provide: a) scanning in three mutually perpendicular planes in the tubular space; b) registration of magnetic field gradients in automatic mode; and c) transmitting to the controller for determining mechanical stresses the measurement data of mechanical stresses in the pipeline in the form of registered magnetic field gradients; a stress detection controller located within the cylindrical body, containing a memory connected to the processor, and configured to receive pipeline stress measurement data from said four probes and store them in said memory.

EFFECT: increasing the accuracy of determining the degree of concentration of mechanical stresses inside the pipeline under conditions of real loads.

4 cl, 2 dwg