RU2733205C1 - Insulating device for fastening of open-wire stubs - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: invention relates to electric power industry, and namely to insulating devices intended for attachment and fixation of lines of overhead transmission lines with voltage of 10÷220 kV. Device consists of a unit for attachment to the support, a rod composite insulating body (1) and wire (2) attachment point in the line. Assembly for attachment to support consists of flat plate (3) and rod bracket (4). Plate (3) is rigidly fixed on terminal (5) of insulating body (1), and ends of bracket (4) are tightened by nuts (6) in holes of plate (3). Device is characterized by simple design.

EFFECT: insulating body allows fixing the line at the specified distance from the support at gusts of wind of any intensity, since it operates as a spring, squeezing and expanding without damage or destruction due to use of glass-fibre reinforced plastic, which is included in its composition, restoring its initial shape and thus holding the loop in the specified position.

6 cl, 1 dwg

Description

The invention relates to the field of power engineering, and more specifically to insulating devices designed for fastening and fixing loops of overhead power lines with a voltage of 10 ÷ 220 kV.

Known device for fixing a bypass loop of an anchor-angular support, containing tension and supporting garlands, characterized in that in order to reduce the supporting garlands and simplify the installation of the loop, each of the supporting garlands is fixed between the insulators of the corresponding tension garland [1].

In this technical solution, in order to avoid unwanted contact of the support loop in the event of its swinging under wind influences, additional supporting insulator strings are used, which significantly increases the cost and complicates the installation of the device.

It is also known a device for tracing a loop of a power transmission line, containing a tension garland of insulators attached to the support traverse, a loop, a horizontal outlet with a counterweight attached to it [2].

The use of counterweights to divert the loop from the support also complicates the entire structure, although the effect of such a design solution is difficult to calculate, therefore, the industrial use of this device for bypassing the power line loop remains a big question.

A device is known for connecting bare wires on supports of overhead power lines with a voltage of 6-500 kV, which is a loop connected near anchor clamps by means of connecting or branch clamps or directly connected to anchor clamps [20].

This loop does not allow an electric arc to overlap due to clashing with the elements of the supports and other parts of the overhead power transmission line under strong wind influences or due to the waste products of birds landing on the traverses of the supports, however, for overhead power lines of medium voltage classes (10-220 kV) the execution of a loop from an insulated wire manufactured as a single integral element or assembled from elements connected to each other with clamps included in its composition is practically not always justified.

The applicant set himself the task of developing an insulating device for fastening and fixing loops of overhead power lines with a voltage of 10 ÷ 220 kV, characterized by a simple design (one insulating element, standard attachment points of the device to the support and wires in the loop), the possibility of fixed retention of the loop at a given distance from supports without any contact with the wire of the train, in particular under strong wind influences (using a rod composite insulating body, since the fiberglass, which is part of it, compresses without collapsing under wind gusts, and then restores its original shape and holds the train in a given position), ensuring the hinge of the loop fastening both in the horizontal and vertical planes (due to the special hinge design of the wire fastening unit in the loop). The aforementioned positive technical result was achieved due to a new set of essential design features of an insulating device for fastening and fixing loops of overhead power lines with a voltage of 10-220 kV, made according to the present invention and presented in the following claims: "an insulating device for fastening and fixing loops of overhead lines power transmission lines with a voltage of 10 ÷ 220 kV, consisting of a connection unit rigidly fixed to the support; the attachment unit is structurally made of at least two parts, namely an insulating body and a wire attachment unit in the loop, which ensures the hinge of the wire attachment in the loop, at least in one plane; the insulating body is made of a rod composite material; the insulating body is fixed to the support by means of an end piece, a flat plate and a curved rod bracket, the plate is rigidly fixed to the end piece of the insulating body, and the ends of the bracket are tightened with nuts in the holes of the plate; the wire fixing unit in the loop is a bolted supporting clamp, in the boat of which the loop wire is located through the spiral protector; it is equipped with a barrier-type bird protection device; it is equipped with a bird protection device of the anti-prick type. "

The essence of the invention is illustrated by drawings, where FIG. 1 shows an insulating device for fastening and fixing loops of overhead power lines with a voltage of 10-220 kV, made according to the present invention.

The inventive insulating device for fastening and fixing loops of overhead power transmission lines with a voltage of 10 ÷ 220 kV, rigidly connected to the support, consists of a connection unit to the support, a rod composite insulating body 1 and a wire attachment unit 2 in the loop.

The assembly for attaching to the support is structurally made, for example, from a flat plate 3 and a rod bracket 4 of a curved shape. The plate 3 is rigidly attached to the end cap 5 of the insulating body 1, and the ends of the bracket 4 are pulled together by nuts 6 in the holes of the plate 3.

The attachment point for the wire 2 in the loop is made in the form of a bolt support clip 7, in the boat of which, through a spiral protector (not shown), the wire 2 of the loop is laid, On the horizontal axis 8 of the suspension of the clip 7, an intermediate link 9 is hinged, connected to the end piece 10 of the insulating body 1, which ensures the hinge of the wire attachment point in the loop in the vertical and horizontal planes. The device can be made with a bird protection device of a barrier or anti-perishable type 11 and a protective screen 12.

The invention works as follows: on an overhead power transmission line, the installation of the device begins with fixing it to a support, for which a plate 3 is attached to the end cap 5 and the bracket 4 is rigidly tightened on it with nuts 6, the connection unit is rigidly fixed to the line support. Then, on the second end 10 of the rod composite insulating body 1, an intermediate link 9 is attached and a supporting clamp 7 is suspended to it on the horizontal axis 8, in the boat of which the wire 2 with a spiral protector or without it is placed. If the insulating body 1 was supplied to the line without a bird protection device and a protective screen, then the latter are mounted simultaneously with the installation on the line of the insulating device itself.

The proposed insulating device for fastening and fixing loops of overhead power lines with a voltage of 10-220 kV compares favorably with known devices of a similar purpose, first of all, by the simplicity of its design: only one insulating element, the nodes for attaching the device to the support and wires in the loop. However, the rod-shaped composite insulating body allows the plume to be fixed at a given distance from the support during gusts of wind of almost any intensity (it works like a spring, compressing and expanding without visible damage or destruction). Ultimately, the inventive device makes it possible to abandon the use of numerous and expensive tension, supporting insulators and other specific devices for looping the loop (acceptable manufacturing cost and low selling market price, which attracts buyers). The same goal is facilitated by the hinge of the wire attachment point in the loop in the vertical and horizontal planes.

Sources of information.

[1] Description of the invention to the inventor's certificate No. 836713, "Device for fixing a bypass loop", H02G 7/20, declared on 11.07.79, published on 07.06.81.

[2] Description of the invention to the inventor's certificate No. 1432648, "Device for tracing a power line loop", H02G 7/20, declared 01/07/87, published 10/23/88.

[3] Description of the invention to copyright certificate No. 480149, "Loop", H02G 7/00, declared 05/12/70, published 08/05/75.

[4] Description of the invention to the inventor's certificate No. 353305, "Device for fixing a bypass loop", H02G 7/20, declared on 06/22/1970, published 09/29/1972.

[5] Description of the invention to the inventor's certificate No. 219650, "Live loop", H02G 7/20, declared 06/01/1965, published 06/14/1968.

[6] Description of the invention to the inventor's certificate No. 185995, "Device for suspension of high-voltage devices, upper and side loops of power lines", H02G 7/00, declared 02.11.1963, published 12.09.1966.

[7] Description of the invention to the inventor's certificate No. 281589, "Device for fastening the loop", H02G 7/00, declared on 12.10.1965, published on 07.07.1984.

[8] Description of the invention to the inventor's certificate No. 185371, "Device for hauler of a loop", H02G 7/20, declared on 28.04.65, published on 25.09.76.

[9] Description of the invention to the inventor's certificate No. 811381, "Device for tracing a loop", H02G 7/00, declared on 04/05/1979, published on 03/07/1981.

[10] Description of the invention to the author's certificate No. 281589, "Device for fastening the loop", H02G 7/00, declared on 10/12/1965, published on 07/07/1984.

[11] Description of the invention to inventor's certificate No. 1653053, “High voltage switchgear loop resistant to deflection”, H02G 7/00; 20, declared 06/01/1989, published 05/30/1991.

[12] Description of the invention to the inventor's certificate No. 1636913, "High voltage power line with crossing an obstacle", H02G 7/00, declared 02.17.1989, published 03.23.1992.

[13] Description of the invention to the inventor's certificate No. 1354321, "Device for branching wires in the span of an overhead power line", H02G 7/00, declared 04/25/1985, published 11/23/1987.

[14] Description of the invention to the inventor's certificate No. 674138, "Device for fastening a bypass loop on a power transmission line support", H02G 7/20, declared 07/08/76, published 07/15/1979.

[15] Description of the invention to the inventor's certificate No. 513435, "Device for hauling a flexible loop from a power line support", H02G 7/20, declared 06.19.74, published 05.05.76.

[16] Description of the invention to the author's certificate No. 1677760, "Device for hauler of a loop", H02G 7/20, declared on 05.10.89, published on 15.09.91.

[17] Description of the invention to the author's certificate No. 512526, "Device for tracing a loop", H02G 7/00, declared 05/23/72, published on 04/30/1976.

[18] Description of the invention to inventor's certificate No. 1644278, "Supporting insulating suspension of the conductor loop of the overhead power line phase", H02G 7/20, declared 03.16.88, published 04.23.91.

[19] Description of the invention to patent No. 2656856, "A device designed to connect bare wires on the supports of overhead power lines with a voltage of 6-500 kV", H02G 7/20, declared 03/02/2017, published 06/07/2018.

Claims (6)

1. An insulating device for fastening and fixing loops of overhead power lines with a voltage of 10 ÷ 220 kV, consisting of a connection unit rigidly fixed to the support, characterized in that the connection unit is structurally made of at least two parts, namely an insulating body and a fastening unit wires in the loop, providing hinge of the fastening of the wire in the loop at least in one plane. 2. The device according to claim 1, characterized in that the insulating body is made of a rod-shaped composite material. 3. The device according to claim. 1, characterized in that the insulating body is fixed to the support by means of an end piece, a flat plate and a curved rod bracket, wherein the plate is rigidly fixed to the end piece of the insulating body, and the ends of the bracket are tightened with nuts in the holes of the plate. 4. The device according to claim. 1, characterized in that the wire attachment unit in the loop is a bolted supporting clamp, in the boat of which the loop wire is located through the spiral protector. 5. The device according to claim 1, characterized in that it is equipped with a barrier-type bird protection device. 6. The device according to claim 1, characterized in that it is equipped with a bird protection device of the anti-perishable type.

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