RU2015103439A - ELECTRICAL WIRES OF THE ELECTRIC TRANSMISSION LINE AND METHOD OF ITS LAYING - Google Patents

Abstract

1. A method of laying a phase electric wire of an overhead power transmission line having high-altitude supports, characterized in that a multi-core composite high-temperature electrical wire is laid, comprising at least one composite core and a multi-core external wire; for laying use an electric wire wound on the drum with an individual length of at least the full anchor construction length of the overhead power line, or its mounting section; a rolling unit configured for horizontal axial hitching of the drum and rolling out the electric wire from the upper side of the drum with a point of translation into the tension line located above the hinge axis; a brake machine with a brake drum and a tensioning machine, together providing rolling of the electric wire with tension; leader cable with coupled ends, which is used as a low-twisted rope with parallel-laid supporting strands in a protective sheath or in a tubular cross-stitch shirt, having a length corresponding to the construction length of the electric wire plus at least six heights to the point of suspension of the specified electric wire, end and intermediate rolling rollers, tensioning and supporting clamps for attaching the power cable to the supports of the specified power line; end and intermediate rolling rollers are installed on the high supports, which are designed for this purpose with a profiled bed, at least the outer contact layer of which is made of elastically deformable material with a hardness lower than the hardness of the outer layer of the wires of the external coil of the electric wire by an amount sufficient

Claims (13)

1. A method of laying a phase electric wire of an overhead power transmission line having high-altitude supports, characterized in that a multi-core composite high-temperature electrical wire is laid, comprising at least one composite core and a multi-core external wire; for laying use an electric wire wound on the drum with an individual length of at least the full anchor construction length of the overhead power line, or its mounting section; a rolling unit configured for horizontal axial hitching of the drum and rolling out the electric wire from the upper side of the drum with a point of translation into the tension line located above the hinge axis; a brake machine with a brake drum and a tensioning machine, together providing rolling of the electric wire with tension; leader cable with coupled ends, which is used as a low-twisted rope with parallel-laid supporting strands in a protective sheath or in a tubular cross-stitch shirt, having a length corresponding to the construction length of the electric wire plus at least six heights to the point of suspension of the specified electric wire, end and intermediate rolling rollers, tensioning and supporting clamps for attaching the power cable to the supports of the specified power line; end and intermediate rolling rollers are installed on the high supports, which are designed for this purpose with a profiled bed, at least the outer contact layer of which is made of elastically deformable material with a hardness lower than the hardness of the outer layer of the wires of the external winding of the electric wire by a value sufficient to ensure installation and technological damage electrical wires in contact with the specified bed, the working profile of which is adopted by the depth and width exceeding the overall diameter of the transverse sections of the laid electric wire; the rolling unit and the brake machine are installed on the head mounting platform in front of the first support, at a distance from it, which provides an angle of inclination of the electric wire to the horizon in the area from the said drum of the brake machine to the end rolling roller on the first support of the specified transmission line, not exceeding 30 °, and the tension the machine is installed and rigidly fixed on the basis of the final installation site with the possibility of providing a similar angle of inclination of the leader cable and, accordingly, the electric wire for the last support mounting portion; mounted on the supports of the specified line, the mentioned tension and / or supporting clamps and in the immediate vicinity of them the said rolling rollers are passed through the rollers in the direction of the first support and to the brake machine leader-cable and connect it for the period of installation with one end to the wiring through brake machine, and to others through a tensioning machine and lay the electric wire along the rolling rollers with a maximum technological tension of not more than 0.7 of the tensile strength of the electric wire and minimum m radius bending roller 40 is not less than the overall diameter of the electric wire, whereupon a relaying process tension and fastening the electric wire in tension and supporting clamps. 2. The method of laying a phase electric wire according to claim 1, characterized in that when laying said electric wire in an overhead power transmission line containing high-rise supports arranged at an angle to be rotated in plan

, to ensure the minimum allowable bending radius of the electric wire on the rolling rollers, the diameter of the latter, counting along the bottom of the bed (trough), take at least 60 overall diameters of the electric wire, while the elastically deformable layer of the bed of the rollers is performed, for example, rubberized or polyurethane, and in the presence of one and more than angular supports with an angle of rotation of more than 60 °, at least on the corresponding angular supports, rollers in the same design with a minimum diameter of at least 1000 mm are used, or tandems of two or More rollers with a non-damaging electrical bed and fastening the tandem to the support through one point. 3. The method of laying a phase electric wire according to claim 1, characterized in that the drum with a leader cable is placed on an anchored tensioning machine and in reverse mode the leader cable is fed to the installation site, pulling it with a tensioning mechanism, for example, a tensioning mechanism with a hydraulic drive and under with minimal tension, they are tucked onto the rollers, connecting to the end of the electric wire of the brake machine. 4. The method of laying a phase electric wire according to claim 3, characterized in that the connection of the end of the electric wire to the leader cable is performed through a swivel, a mounting loop and a mounting stocking in the form of a cross braid made of soft wire and a strip of protective tape that prevents damage to the end section of the electric wire. 5. The method of laying a phase electric wire according to claim 1, characterized in that the pulling of the electric wire begins at a minimum speed of 5 m / min, and after passing the first support of the line, the speed of the broach is increased to 100 m / min, and at the beginning of the process they are put into operation the brake machine, which begins to release the wire, adjusting the sag, then turn on the tensioning machine and make a broach. 6. The method of laying a phase electric wire according to claim 1, characterized in that the installation work for laying the electric wire is performed using a tensioning machine that is equipped with a winch with a smoothly varying speed of pulling, a reverse device, a device for changing traction, a limiter of a given maximum tension and capstan, at the same time, the capstan has a drum diameter smaller than the drum diameter of the brake machine and is intended for winding only the leader cable. 7. The method of laying a phase electric wire according to claim 5, characterized in that the brake machine is equipped with a smooth adjustment of the braking force, which ensures the regulation of the tension and sag of the electric wire, and, moreover, the specified machine is equipped with a double brake drum with a diameter exceeding the minimum allowable by the condition of non-destructive bending of an electric wire containing composite conductors; at the same time, the operation of the brake and tensioning machines is automatically coordinated with the provision of the required tension in the entire permissible range of speeds for pulling the electric wire. 8. The method of laying a phase electric wire according to claim 1, characterized in that the transfer of the electric wire from the roller to the supporting clamps is carried out using a mounting beam with a winch. 9. The method of laying a phase electric wire according to claim 1, characterized in that after installation in operational suspension clamps, the electric wire is equipped with vibration dampers. 10. The method of laying a phase electric wire according to claim 1, characterized in that they lay an electric wire under a voltage of 10-0.4 kW. 11. The method of laying a phase electric wire according to claim 1, characterized in that the electric wire is laid under a voltage of class 35-330 kW. 12. The method of laying a phase electric wire according to claims. 1, 10, 11, characterized in that as high-temperature composite used electric wires such as electric wires of the company LUMPI-BERNDORF. 13. Phase electric wire of an overhead power transmission line, including a current-carrying part with multicore phase conductors mounted on high-rise supports with traverses, characterized in that at least it is made of high-temperature composite, contains a multicore external wire, a core with at least one composite core and is laid in the specified line according to any one of paragraphs. 1-12 of a method of laying a phase electric wire of an overhead power line.