CABLE INSULATION STITCHING DEVICE Russian patent published in 2008 - IPC H01B13/00 

FIELD: cable industry; production of polymeric items.

SUBSTANCE: proposed device has frequency changer, high-voltage transformer, gas-discharge reactor, photoelectronic multiplier with display unit, polarized degree-of-stitch and its uniformity indicator, and reactor gas mixture pressure build-up and maintenance unit. Sectionalized gas reactor of type depending on cable thickness is used, each reactor section having variable-diameter quartz glass tube; these tubes are installed in tandem and cable conductor covered with insulation applied by extrusion is passed through them. Compressed inert gas (nitrogen or argon) is supplied to tube of each reactor from gas cylinder at pressure of 10 at. Attached to external wall of quartz tube are conductive metal electrodes and industrial- or high-frequency (50, 150, or 300 Hz) AC voltage of 10 to 70 kV is applied across them. Metal current-carrying conductor of cable functions as gas-reactor central grounded electrode.

EFFECT: facilitated procedure and enhanced safety of stitching cable polyethylene and polypropylene using industrial method.

1 cl, 3 dwg