Spacer for wires of overhead power transmission lines

FIELD: electricity.

SUBSTANCE: spacer contains pull bar made as a plate (1) connected to wires (2) by means of holes (3) with elastic members (4) made as anticlockwise twisted wire rope sections fixed by retaining screws (5) to clamps (6). Along outside contour of the plate there is shoulder (7) fixed at the plate by corners (8), bolts and screws. Spacer is also equipped with two rod-hammers (11) screwed by threaded portion (12) into threaded opening in plank (14) fixed to the plate (1) by screws.

EFFECT: enlarging functional capabilities.

2 dwg

The invention relates to power engineering and can be used for the mechanical removal of ice deposits with wires and limitations of the amplitudes of their oscillations in dangerous conditions.

A known design of spacer wires for overhead transmission lines that contain cravings, and made two elements, as well as the connections of traction elements among themselves and with the wires, allowing their relative movement (see, for example, A.S. USSR USSR, No. 886127, CL H02G 7/12, 1979 [1]/.

Also known spacers for the wires of overhead power lines containing cravings, made of two elements, and the nodes connecting the traction elements and the fastening rod to the wire, in the form of flat articulated four-link mechanism that enables the movement of the traction elements one relative to the other /see A.S. USSR №1495889, CL H02G 7/12, 7/14, 1987 [2]/.

In addition, the spacer wires for overhead transmission lines, maintenance of traction with devices for fastening of the pull wire, made in the form of two elements that are installed with the possibility of longitudinal movement relative to each other and provided with stops to limit the relative movement of the elements, with one of the devices installed on one of the traction elements made in the form of pipes, and others who Sarafovo - on another item, made in the form of a rod telescopically mounted in the tube /see A.S. USSR №687515, CL H02G 7/14, 1977 [3]/.

The disadvantages of the known constructions of the spacers is the low efficiency of the vibration damping wires and energy dissipation of the oscillations, as well as dumping ice deposits from the wires.

The closest device to the same destination to the proposed device, the set of essential characteristics is the spacer wires for overhead power lines containing cravings installed on both sides of the elastic elements and clamps for attachment to the wires, while traction is made in the form of a plate, and elastic elements in the form of twisted opposite direction of the twist of the strands of the rope connected with one end to the clamp, and the other with end thrust /see A.S. USSR №2040839, CL H02G 7/12, 1993 [4]and adopted for the prototype.

The drawbacks of the prototype at a relatively selective clearing them of spurious vibrations are limited functionality due to the inability of its use for the mechanical removal of wires formed by ice deposits.

The invention consists in the construction of the spacer wires for overhead transmission lines, providing, on the one side the us, the damping of the vibrations of the wires due to the effective dissipation of vibration energy in the torsional oscillations of the spacers, and on the other, the effective removal of ice deposition from the wires due to intense collisions braces with wires.

The technical result - the expansion of the functionality of the device by providing them as elective damping unwanted vibrations and mechanical removing them from the ice deposits.

This technical result in the implementation of the invention is achieved in that in the known spacer wires for overhead transmission lines, containing a rod attached to the wires with clamps and made in the form of plates installed on both sides of the elastic members, which are twisted with the opposite direction of the twist pieces of rope connected with one end to the clamp, and the other with the middle of the parallel wires of the end plates, the peculiarity lies in the fact that the spacer has two terminals-the drummers attached to the plate with the possibility of non-destructive plug removal along the perpendicular to the wire ends of the plate with the protrusion beyond it on both sides until out of line wires at their maximum possible distance from each other, and SAG what we made in the form of freely mounted on wire bushings contact with the wire whose surface is provided with artificial roughness.

The invention is illustrated by drawings, where figure 1 schematically illustrates the spacer, General view; figure 2 - cross section A-a in figure 1.

The spacer wires for overhead transmission lines contains cravings, made in the form of a plate 1, is attached by means of parallel wires 2 ends of the through hole 3 to the elastic elements /cables/ 4. Elastic elements 4 are twisted with the opposite direction of the twist of the strands of the rope and attached the free ends by means of the clamping screws 5 to the terminals 6. The latter is in the form of freely mounted on wire 2 bushings in contact with the wires 2 the surface of which is /that is, the surface of the axial bore in the sleeve 6/ is equipped with artificial roughness, technically made in the form of coarse knurl /on the drawings of the axial bore of the knurled not shown/. On the outer contour of the plate 1 from both sides made the flange 7, technologically made in the form of narrow flexible plastic plate, clamped around the contour of the middle part to the end plate 1 and fixed to the latter with the help of over 8 on both sides of the plate 1, the bolts 9 and screws 10. In addition, the spacer has two terminals-the drums 11, attached to p is istence 1 with the possibility of their non-destructive plug removal along the perpendicular to the wires 2 ends of the plate 1 with protruding outside from both sides to go over the line wires 2 at their maximum possible distance from each other during operation of the transmission line, i.e. when the effect of wind disturbances. Fastening implemented by svorachivaniya each of the rods drummers of 11 round cross-section, the middle of the threaded part 12 in a threaded hole 13 in strap 14 attached to the plate 1 by the same screws 10. Both ends of a single rod-drummer 11 /right figure/ placed above the wires 2, and the ends of the left in the figure rod-drummer 11 brought under the wire 2. In places of fastening of the elastic element 4 to the plate 1 flange 7 openings 15 to perform the shoulder 7 in the area flush with the plate 1.

The proposed strut works in the following way, in the description of the device prototype [4] described in detail, as when removing the convergence of the 2 wires from each other in different half cycles of the impact of wind perturbations plate 1 due to the unwinding of the elastic elements 4 will be intensively to rotate in opposite directions. Also described in detail the process by which such angular vibrations of the plate 1 to provide dissipation /dispersion/ energy vibrating wires to and extinguish their parasitic oscillations. In the proposed device is additionally provided almost constant and intense collision of the ends of the rods drummers of 11 with 2 wires, th is provides a constant discharge of ice sediments with 2 wires directly on the stage of their education, not allowing to be formed on the wires 2 a significant layer of sediments. So, in the first half-period wind perturbations, for example, when the wire 2 is removed from each other, the plate 1 will start to rotate in the clockwise direction when looking at the figure above, right in the figure, the rod-drummer 11 rotates through an angle of 180° and hit both wires 2 from above, at left in the figure, the rod-drummer 11 rotates through the same 180° and hit the two wires 2 from the bottom. In the following half-period wind perturbations, when the wire 2 will be closer, the plate 1 will rotate in the opposite direction and both rod-drummer 11 again with the simultaneous collision with both wires 2 will return in the shown position. However, due to the free allocation of clamps-sleeves 6 on the wires 2 when torsional vibrations of the plate 1 and shock interactions rods 11 with the wires 2 /on the basis of the law of conservation of the position of the centre of mass of the system will be continuous oscillatory mixing bushings 6 along the wires 2. Due to the inevitable asymmetry in vibro dynamic modes /different thickness layers of ice deposits on the parts of the wires 2, that is, different friction bushings 6 wires, different angles and phases of the application on both sides of the plate 1 shock rod 11 to p is the botflies 2, various mixing the 2 wires from the horizontal, etc./ vibrational blends of the bushing 6 by wire ~ will be constant formed, whereupon the sleeve 6 will be constantly "crawl" through the wires within the span. Due to the presence on the inner surface of the sleeves 6 artificial roughness /coarse knurl/ torsional and linear oscillatory displacement of the sleeves 6 relative to the wire 2, while their progressive unidirectional movements will provide additional shock elective mechanical removal of ice deposits from the surface of the wires 2. The implementation of non-destructive detachable connection rods drummers 11 with the plate 1 will give the opportunity to voracity these rods 11 in spacers in preparation for the winter season, dangerous from the point of view of the formation of ice deposits on the wires, and then they turn out after the end of the season, after which the spacer works in the tails of the device-prototype [4]. However, it doesn't matter if the rods-the drums 11 are permanently screwed, and strut all the time will work in the above modes. If the limitation of the angle of the torsional vibrations of the plate 1 by the rods 11 decreases the efficiency of energy dissipation parasitic vibrations;? due to the interaction of the plate 1 when Coleman the I air environment. However, this is compensated by intensive dissipation of the energy of the vibrations shock interactions stubble 11 with 2 wires. Such periodic shock interaction provide, as you know, more "ostraco" wires from the resonant modes and effective breakdown of these modes.

The proposed device has a relatively colds design, pretty versatile, has enhanced functionality and can be made almost in the bushes conditions without the use of expensive components and accessories.

The spacer wires for overhead transmission lines, containing a rod attached to the wires with clamps and made in the form of plates installed on both sides of the elastic members, which are twisted with the opposite direction of the twist pieces of rope connected with one end to the clamp, and the other with the middle of the parallel wires of the end plate, wherein the spacer has two terminals-the drummers attached to the plate with the possibility of non-destructive detachable udaleniya along the perpendicular to the wire ends of the plate with protruding outside from both sides to go over the line wires at their the greatest possible distance from each other, and clamps ispolneny in the form of freely mounted on wire bushings contact with the wire whose surface is provided with artificial roughness.