RU2644402C1 - Device for fixing insulated wires on supports of air transmission lines (options) - Google Patents

Abstract

FIELD: electric power engineering.

SUBSTANCE: invention relates to the electric power industry, namely to devices for fixing insulated wires on the supports of overhead power lines. Device (its variants) comprises a clamp, a shunt connected to the clamp and a contact clamp piercing the insulation of the wire conductor. In case of the anchoring variant of fastening (Fig. 1) the spiral clamp consists of U-shaped power spiral 1, loop 2, and cushion 3. Power spiral 1 of loops 2 is inserted into cushion 3 and its ends are wound on wire 4. Shunt is made from insulated or uninsulated conductor 5, fixed at one end by girdle 3, and fixed at the other end into contact terminal 6.

EFFECT: invention allows to achieve a significant result in terms of ensuring reliable operation during use and saving material costs during their manufacture and installation.

9 cl, 2 dwg

Description

The invention relates to the field of electric power, in particular to devices for fastening, for example, anchor and intermediate, protected by insulation of wires on the supports of overhead power lines with voltage of 0.4 ÷ 35 kV and higher.

Known spiral tension clamp for hanging bare wires of overhead power lines containing strands of wire spirals, the branches of which are wound on a wire or composite core of the wire, and a thimble mounted on a support, characterized in that the strands of wire spirals are made of a material whose physical and mechanical characteristics are the physical and mechanical characteristics of the core material and the wire itself or its composite core are the same, wire spirals of strands of a round or trapezoidal shape we are wound on a wire or composite core with a variable angle of elevation of the wire spirals, counted from the cross section of the clamp perpendicular to it or the core of the longitudinal axis, while the ends of the strands of wire spirals are clamped in the back cones of the thimble, resting on the liner of a cylindrical glass fixed in the thimble, the angle of the inverse cones is approximately equal to the angle of elevation of the wire spirals of the strands, the inner surface of which is covered with a layer of abrasive with a grain size selected within 0.1–0.5 mm [1].

This is a well-known technical solution, namely a spiral tension clamp, designed exclusively for suspension of uninsulated wires of overhead power lines, and it does not solve the problem of surge protection of conductive conductors, for example, self-supporting insulated wires, which is a prerequisite for reliable operation of overhead power lines with protected insulation wires.

Also known is a spiral-type support clamp for attaching fiber optic cables to the supports of overhead power lines, comprising a suspension made in the form of a boat pivotally connected to an intermediate link, a spiral protector covering the cable, and at least two strands composed of several power spirals wound over a spiral tread, characterized in that a trapezoidal groove is made on the lateral surfaces of the boat, one of the strands is located on a spiral leak an aure with the left direction of winding the power spirals, and the other with the right direction of winding the power spirals so that they are wound crosswise on the spiral tread, while the power spirals of these strands are glued and abrasive is applied to their inner surfaces, with the ratio of the pitch to the outer diameter the power spiral of the strand with the left winding direction lies within 5–7, and the ratio of the pitch to the outer diameter of the power spiral of the strand with the right winding direction lies within 4.5–6 [2].

The disadvantage noted in the above analogue is also characteristic of this technical solution, the only difference is that in the first version it was a spiral tension clamp, but here we consider a spiral-type supporting clamp.

The authors solved the problem of developing a device for mounting insulated wires on the supports of overhead power lines of various voltage classes, providing reliable overvoltage-free operation of overhead power lines with insulated wires for a long period of operation, while the inventive device should be simple in design and manufacturing technology , as well as acceptable in terms of value.

The indicated positive technical result was achieved due to the combination of essential structural features of the proposed device for fastening insulated wires on the supports of overhead power lines, presented in the following claims: "device for fastening insulated wires on the supports of overhead power lines, containing a spiral clamp, at least at least one shunt connected to a spiral clamp and piercing the insulation of the wire core, at least one a contact clamp providing a conductive connection, wherein the spiral clamp consists of a U-shaped power spiral formed from separate wire spirals, a loop embedded in the thimble, and ends wound on a wire, said shunt made of an insulated or uninsulated conductor and fixed to the thimble; power spiral and thimble spiral clamp made of non-magnetic materials; the power spiral of the spiral clamp is made of non-magnetic materials, and the thimble of the spiral clamp is made of magnetic materials; the length of the shunt is selected in the range from 50 mm to 1500 mm; the diameter of the shunt is selected from 2 mm to 25 mm; a device for attaching insulated wires to the supports of overhead power transmission lines, comprising a clamp, at least one shunt connected to the clamp, and piercing the insulation of the wire core, at least one contact clamp, providing a conductive connection, wherein the above clamp is made in in the form of a boat with a wire fixed in it through a spiral protector wound on it, the said shunt is made of an insulated or uninsulated conductor and is located between the attachment point of the boat to the wire dy and insulation piercing terminal contact wire strands; the length of the shunt is selected in the range from 50 mm to 1500 mm; the diameter of the shunt is selected from 2 mm to 25 mm; the boat, its attachment points to the wire and the spiral protector are made of non-magnetic materials. "

The invention is illustrated by drawings, where in FIG. 1 shows a general view of a device for attaching insulated wires to the supports of overhead power lines made in accordance with the present invention, an embodiment with a spiral tension clamp; in FIG. 2 is the same as in FIG. 1, version with spiral support clamp.

The inventive device for protected by insulation wires on the supports of overhead power lines contains a clamp, a shunt connected to the clamp, and piercing the insulation of the wire core contact clamp. For the option of anchoring the wire protected by insulation (Fig. 1), the spiral clamp consists of a U-shaped power spiral 1 formed of individual wire spirals, loop 2 and thimble 3. Power spiral 1 loop 2 is inserted into the thimble 3 and its ends are wound onto the wire 4. The shunt is made of an insulated or non-insulated conductor 5, is fixed, for example, by crimping one end on the thimble 3, and the other end is fixed in the piercing insulation of the conductor 4 of the terminal 6, providing a conductive connection . The contact clamp 6 punctures the insulation of the end 7 of the wire 4 emerging from the thimble 3. The power spiral 1 and the thimble 3 of the clamp can be made of non-magnetic materials or the power spiral 1 can be made of non-magnetic materials, and the thimble 3 of the spiral clamp 1 can be made from magnetic materials.

For the option of intermediate fastening of the wire protected by insulation (Fig. 2), the clamp is made in the form of a boat 8, in the trench of which an insulated wire 9 with a spiral protector 10 is wound on it. The boat 8 is mounted on an insulated wire 9 with a spiral protector 10 with U-bolts 11 and suspended by suspension 12 on an overhead power line support. The shunt is made of an insulated or non-insulated conductor 13, is attached to the U-shaped bolt 11 of the boat 8 and is fixed in the terminal 14 piercing the insulation of the core of the wire 9.

Boat 8, U-shaped bolts 11, spiral protector 10 can be made of non-magnetic materials.

In both cases, the length and diameter of the shunt are selected in the range from 50 mm to 1500 mm and from 2 mm to 25 mm, respectively.

The invention works as follows:

The inventive device for mounting insulated wires on the supports of overhead power lines, for example, voltage 0.4 ÷ 35 kV is actually designed to perform two functions, namely the function of mechanical fastening of insulated wires, for example, in the tension and supporting clamps of overhead power lines with insulated wires and surge protection functions for conductive conductors, for example, self-supporting insulated wires. This two-fold function is realized due to the constructive unification of linear reinforcement elements designed to suspend insulation-protected wires on the supports of overhead power lines and elements that ensure the removal of electric currents during surge surges to the ground. That is, devices for attaching insulated wires to the supports of overhead power lines, equipped with shunts made in the form of insulated and uninsulated conductors, and contact clamps that pierce the insulation of conductive wires of the wires, serve simultaneously as surge arresters, which allows to achieve a significant practical result in parts for ensuring the reliable operation of devices during long-term operation and saving material costs in their manufacture and installation . The LLC "MZVA" established mass production of the claimed devices.

Information sources

1. Description of the invention to the patent of the Russian Federation No. 2558388 "Spiral tension clamp", H02G 7/02, claimed 05/30/2013, published 08/10/2015.

2. Description of the invention to the patent of the Russian Federation No. 2175805 "Supporting clamp of spiral type", H02G 7/05, claimed 08.08.2000, published 10.11.2001.

3. Description of the invention to the patent of the Russian Federation No. 2313873 “Supporting clamp”, H02G 7/05, claimed September 19, 2006, published December 27, 2007.

4. Description of the invention to the patent of the Russian Federation No. 2231188 “Supporting clamp”, H02G 7/05 declared on 08.22.2001, published on 06.20.2004.

5. Description of the invention to the patent of the Russian Federation No. 2189682 "Protective tread", H02G 7/14, claimed 16.11.2000, published 09/20/2002.

6. Description of the invention to the patent of the Russian Federation No. 2431226 "Spiral support clamp", H02G 7/05, filed July 1, 2010, published October 10, 2011.

7. Description of the invention to the patent of the Russian Federation No. 2584824 "Device for protecting insulated wires, linear insulators and equipment 6 ÷ 35 kV overhead power lines from atmospheric overvoltages (options)", H02G 7/00, claimed 09.04.2015, published 05/20/2016.

8. Description of the invention to the patent of the Russian Federation No. 2168825 "Tread for overhead power lines", H02G 7/14, claimed December 15, 1999, published May 10, 2001.

9. US patent No. 2947504 published 02.08.1960.

10. US patent No. 4791237 published December 13, 1988.

11. Description of the invention to the patent of the Russian Federation No. 22569621 "Method for the manufacture of spiral type clamps", H02G 1/04, claimed 02.04.2004, published 27.08.2005.

12. Description of the invention to the patent of the Russian Federation No. 2272346 "Spiral tension clamp", H02G 7/02, filed July 29, 2004, published March 20, 2006.

13. Description of the invention to the patent of the Russian Federation No. 2435265 "Tension wedge clamp", H02G 7/02, claimed 24.09.2010, published 11.27.2011.

14. Description of the invention to the patent of the Russian Federation No. 2315408 "Spiral tension clamp", H02G 7/02, claimed 30.08.2006, published 01.20.2008.

15. Description of the invention to the patent of the Russian Federation No. 2291535 "Spiral tension clamp", H02G 7/02, claimed 129.10.2005, published 10.01.2007.

Claims (9)

1. A device for attaching insulated wires to the supports of overhead power lines, comprising a spiral clamp, at least one shunt connected to a spiral clamp, and piercing the insulation of the wire core, at least one contact clamp providing a conductive connection, wherein the spiral clamp consists of a U-shaped power spiral formed of individual wire spirals, a loop embedded in the thimble, and ends wound on a wire, the shunt being made of insulated or non-insulated th e wire and secured to the thimbles. 2. The clamp according to claim 1, in which the power spiral and the coil of the spiral clamp are made of non-magnetic materials. 3. The clamp according to claim 1, in which the power spiral of the spiral clamp is made of non-magnetic materials, and the thimble of the spiral clamp is made of magnetic materials. 4. The clamp according to claim 1, in which the length of the shunt is selected in the range from 50 mm to 1500 mm. 5. The clamp according to claim 1, in which the diameter of the shunt is selected in the range from 2 mm to 25 mm 6. A device for attaching insulated wires to the supports of overhead power lines, comprising a clamp, at least one shunt connected to the clamp, and piercing the insulation of the wire core, at least one contact clamp, providing a conductive connection, wherein the above clamp made in the form of a boat with a wire fixed in it through a spiral protector wound on it, the aforementioned shunt is made of an insulated or uninsulated conductor and is located between the attachment point of the boat to the water and piercing wire core insulation with a contact clamp. 7. The clamp according to claim 6, in which in which the length of the shunt is selected in the range from 50 mm to 1500 mm 8. The clamp according to claim 6, in which the diameter of the shunt is selected in the range from 2 mm to 25 mm 9. The clamp according to claim 6, in which the boat, its attachment points to the wire and the spiral protector are made of non-magnetic materials.

Images