RU191896U1 - SCREEN - Google Patents

Abstract

The utility model relates to the field of electric power industry, and more particularly to screens protecting linear fittings of overhead power lines with insulated wires and / or wires without isolation from overlapping linear insulation by foreign objects conducting electric current. The screen consists of two parts 1 and 2 mounted on wire 3 in front of the linear clamp or directly on the linear clamp itself. Parts 1, 2 are fully or partially made of dielectric material. On the outer surface of parts 1, 2 there are elements 4 that are capable of piercing objects that conduct electrical current falling on them. Parts 1, 2 are made in the form of round half-disks, rigidly fastened along the central axis 5 with clamps 6, 7 by means of bolts 8, 9. Elements 4 located on the outer surface of parts 1, 2 are fixed to them by the type of spokes of a bicycle wheel, and every two element (knitting needles) 4 are fixed rigidly between themselves by triangular struts 10. When conducting conductive foreign objects along or across (up or down) overhead power lines, they will almost certainly come in contact with the screen, since the screens are mounted to mpleksno, covering and protecting all the constructive elements of the line, the screen elements are in contact with their conductive extraneous objects electric current pierce them, thereby destroying and stopping further movement of the overhead power line, as a result, the effectiveness of the protective action of the screen is very high. The proposed screen allows you to eliminate the emergency shutdown of overhead power lines of various voltage classes on extraneous objects conducting electric current. 3 ill.

Description

The utility model relates to the field of electric power industry, and more particularly, to screens protecting linear fittings and insulation of overhead power lines with insulated wires and / or wires without isolation from overlapping linear insulation by foreign objects conducting electric current.

Known high-voltage insulator for mounting, as a single insulator or as part of a column or string of insulators, a high-voltage wire in an electrical installation or on a power line, containing an insulating body and reinforcement in the form of first and second reinforcing elements installed at its ends, the first reinforcing element being made with the ability to connect directly or through a mounting device with a high-voltage wire or with a second valve element of the previous high-voltage insulator the specified column or garland, and the second reinforcement element is configured to connect to the support or the first reinforcement element of the subsequent high-voltage insulator of the specified column or garland, characterized in that it further comprises a multi-electrode system consisting of m, m≥5 electrodes mechanically connected with an insulating the body and located between its ends with the possibility of formation under the influence of lightning overvoltage of an electric discharge between the first element of the armature and adjacent (adjacent) to it an electrode (electrodes), between adjacent electrodes, as well as between the second element of the valve and adjacent (adjacent) electrode (s); and means of compensating for the shortening of the creepage distance of the insulator introduced by the multi-electrode system [1].

This insulator-arrester, protecting the air line from lightning discharges, will be practically useless when the line comes into contact with some conductive object, for example, triggered metallized balls or tapes that easily touch the grounded parts of the line (traverses, descents, etc.) and disconnect her.

Also known is an insulator-arrester containing a disk-shaped insulating body, rigidly fixed in the center of the insulating body, on both sides, the first and second reinforcement elements, one of which is used to connect to a high-voltage wire, and the second to support the power line, with the first and the second reinforcing elements galvanically or through an air gap with their own ends connected the upper and lower supply electrodes, each of which is separated by an air gap from the insulating body, and the second end of the lower the lead electrode through the air gap is connected to the last electrode of the multielectrode system, which is located in the profile of silicone rubber, which is rigidly fixed to the edge of the insulating body, between the electrodes of the multielectrode system in the profile there are holes extending outward of the profile and forming miniature gas-discharge chambers, around the circumference of the insulating body , from the inside of the multi-electrode system, a ring-shaped accelerator of electrodynamic blast from an electrically conductive is rigidly fixed material, characterized in that the electrodynamic blast accelerator is made open, its one end is galvanically connected to the upper supply electrode, and the second end of the annular electrodynamic blast accelerator is connected through the air gap to the first electrode of the multi-electrode system [2].

This technical solution also does not work effectively when the elements of the overhead power line come into contact with foreign conductive objects.

Also known is a protective shield designed to protect against obstruction by an electric arc on foreign objects of intermediate insulating suspensions of overhead power lines 6 ÷ 500 kV, consisting of at least two interconnected parts and fasteners, characterized in that it is installed in the lower and upper parts of the insulating suspension, the above-mentioned parts, made partially from insulating and conductive materials, are made in the form of at least two joints interconnected by means of half-ellipse clamps, while the large sides of the ellipse formed during the joint of the half-ellipses are parallel to the crosshead and wire of the overhead power transmission line [3].

This protective shield cannot be considered a universal technical solution from the point of view of protecting linear fittings and isolating overhead power lines from overlapping linear insulation with foreign objects conducting electric current (the shield is installed only on intermediate (supporting) insulating suspensions in parallel along the crosshead and wire of the overhead power line).

The applicant set himself the task of developing a screen that protects the linear fittings of overhead power lines with insulated wires and / or wires without isolation from overlapping linear insulation with foreign objects conducting electric current, quite simple in design, reliable in operation and universal in its functional application (to ensure comprehensive protection of overhead power lines from overlapping linear insulation with foreign objects conducting electric current all sorts of design options and a variety of voltage levels). This positive technical result was achieved due to the combination of essential design features of the shield, presented in the following utility model formula: “shield protecting linear fittings and insulation of overhead power lines with insulated wires and / or wires without insulation from overlapping linear insulation by extraneous conductive electric current objects consisting of at least two parts mounted on a wire in front of a linear clamp or directly on the l "a frost clamp made wholly or partially from a dielectric material, while on the outer surface of the aforementioned parts there are elements capable of piercing foreign objects conducting electric current falling on them."

The essence of the proposed technical solution is illustrated by drawings, where in FIG. 1 is a side view of a screen according to the present utility model; in FIG. 2 is the same as in FIG. 1, front view; in FIG. 3 is the same as in FIG. 1, axonometric view.

The inventive shield that protects the linear reinforcement of overhead power lines with insulated wires and / or wires without isolation from overlapping linear insulation with foreign objects conducting electric current, consists of two parts 1 and 2 installed on wire 3 in front of the linear clamp or directly on the linear clamp (not shown), Parts 1, 2 are fully or partially made of dielectric material. On the outer surface of parts 1, 2 there are elements 4 that are capable of piercing objects that conduct electrical current falling on them.

Parts 1, 2 can be made in the form of round half-disks, rigidly fastened along the central axis 5 with clamps 6, 7 by means of bolts 8 9. It is also possible to carry out the combination of structural parts 1, 2, as one single part, in the corresponding injection mold.

Elements 4 located on the outer surface of parts 1, 2 are fixed to them by the type of spokes of a bicycle wheel and every two elements (spokes) 4 are fixed rigidly between themselves by triangular struts 10.

The utility model works as follows:

When moving foreign objects along or across (up or down) the overhead power line, they will almost certainly come in contact with the screen (bump into the screen), since the screens are mounted in a complex way, covering and protecting all the structural elements of the line (wires, supports, suspensions, fittings) moreover, the screen elements will, when they get foreign objects conducting electric current, pierce them, thereby destroying and stopping further movement along the overhead power line, as As a result, the effectiveness of the protective action of the screen is very high.

The proposed screen allows you to exclude emergency shutdowns of overhead power lines of various voltage classes to foreign objects conducting electric current (balls with metallized tapes, conductive objects carried by birds (animals), objects falling on the line due to hooligan actions, etc.) . Currently, due to overlap of linear insulation on overhead power transmission lines of 35-220 kV, according to PJSC MOESK, about 30 blackouts occur annually, which is 10% of the total number of technological failures.

Information sources:

[one]. Description of the invention to the patent "High-voltage insulator and high-voltage power line using this insulator" No. 2377678, class НВВ 17/00, filed March 27, 2008, published December 27, 2009

[2]. Description of the utility model for the patent "Insulator-arrester" No. 127245, class НВВ 17/00, announced on 08.29.2012, published on 04.20.2013

[3]. Description of the utility model for the patent “Protective screen” No. 180655, class НВВ 17/52, claimed September 14, 2017, published June 20, 2018

[4] Description of the utility model for the patent “Isolator-Arrester” No. 108206, class Н01В 17/00, claimed on April 14, 2011, published on September 10, 2011

[five]. Description of the invention to the patent “Lightning protection device and power transmission line with lightning protection device” No. 2248079, class Н02Н 9/06, filed October 10, 2002, published March 10, 2005

[6] Description of the invention to the patent “Down conductor device for lightning protection of electrical equipment and a power line equipped with such a device” No. 2299508, class Н02Н 3/22, Н01Т 4/02, filed March 4, 2005, published May 20, 2007.

[7] US Patent No. 5,283,709 A, class H01B 17/00, published 02/01/1994

[eight]. Description of the invention to the patent "High-voltage power line and high-voltage insulator for this line" No. 2378725, class НВВ 17/00, filed April 24, 2008, published January 10, 2010.

[9] US Patent No. 4665460, class H01T 4/02, published in 1987

[ten]. Description of the invention to the patent "Insulator-arrester and power line using this insulator" No. 2521771, class Н01Т 4/02, filed March 13, 2013, published July 10, 2014.

[11] Description of the invention to the USSR copyright certificate “Shield” No. 336700, class Н01В 17/42, published 1970.

[12] VEB Hochspannungsarmaturenwerk Radebeul. GDR Catalog, 1960, sheet 443/4.

[13] Description of the invention to the USSR copyright certificate “Shield” No. 904055, class Н02В 5/00, claimed on 05/21/1980, published on 02/07/1982.

[14] Description of the utility model for the patent "Discharger, insulator and power line using this insulator" No. 136928, class Н01Т 4/00, filed June 28, 2013, published January 20, 2014.

Claims (1)

A shield protecting linear fittings and insulation of overhead power lines with insulated wires and / or wires without isolation from overlapping linear insulation with foreign objects conducting electric current, consisting of at least two parts installed on the wire in front of the linear clamp or directly on linear clamp, fully or partially made of dielectric material, while on the outer surface of the above-mentioned parts are elements capable of piercing foreign objects conducting electric current falling on them.

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