METHOD TO MONITOR AND REPAIR INSULATION OF WIRES Russian patent published in 2014 - IPC G01R31/08 

FIELD: measurement equipment.

SUBSTANCE: invention relates to electric measurement equipment and may be used in cable industry for monitoring and repair of enamel insulation of wires. Substance: wire is stretched via a defect sensor and a speed sensor. As a defect area in wire insulation passes by, a defect pulse is generated. Under the moving wire they install a unit for application of enamel insulation onto the defect area, and the unit is made in the form of a vessel of electroconductive material, the body of which is grounded. The vessel is filled with an electrophoretic composition. Above the vessel at the distance L₁ from the defect sensor they install a roller. At the distance L₂ from the roller they install a movable element of vertical displacement, on the end of which there is a fork fixed with a roller pressed to the surface of the controlled wire. The fork with the roller is fixed at the height h from the surface of the electrophoretic composition. Downstream the fork they install a gauge, the diameter of which corresponds to the diameter of the controlled wire. The controlled wire is stretched through the fork with the roller and the gauge. If a defect area is detected in the wire insulation, the generated defect pulse is delayed for the time where V - speed of the wire, t_v - time of vertical displacement of the drive to the distance h+Δ, where Δ - depth of wire submersion into the electrophoretic composition. Upon expiration of the time t₃ along the formed front edge of the defect pulse an actuating device of vertical displacement is started, and the defect area is submerged to the depth Δ into the electrophoretic composition. Afterwards they divert the element of vertical displacement into the initial position, and by the command from the control unit formed along the rear edge of the defect pulse, the wire is stopped. The actuating device of vertical displacement is disconnected, supply voltage is disconnected from the defect sensor, the wire strand is disconnected from the earth, positive potential of the controlled source of direct current is connected to it, and the source of controlled direct current is connected. At the same time the value of the positive potential of the source of regulated direct current is changed until the value of the anaphoresis current reaches the specified value. At this current they deposit the film of the enamel on the defect area of the wire insulation. Then the source of direct controlled current is disconnected from the wire strand and is disconnected. The wire strand is again grounded. The supply voltage is connected to the defect sensor. The unit of enamel baking is connected, and the wire is again put in motion, pulling the defect section with the applied enamal layer via the gauge and the enamel baking unit.

EFFECT: increased accuracy of monitoring, possibility to repair defect sections of enamel wire insulation.

3 dwg