RU2337443C2 - Protection device on power transmission line - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: invention is related to devices designed for operation of power transmission lines (LEP). Protection device on power transmission line is made of electric insulating material and may be used as device for protection against birds. Device consists of three sectional parts in the form of shells open from the top. Cartridge-shaped shell of middle part is arranged with the possibility of insulator installation in it and has common internal volume with transition part-channels. Shell-channels are arranged with cross ∩-shaped section and are corrugated on part of channel surface. Shell-channels are connected with transition part-channels by means of extreme parts imposition and superposition of through slots in their top part, in which elastic latch is inserted, which belongs to flat spring latch.

EFFECT: provides reliability of operation, reliability of current-conducting parts coverage next to insulators and makes it possible to simplify device assembly.

5 cl, 4 dwg

Description

The invention relates to devices designed for the operation of power lines (power lines), in particular, is a bird protection device.

Known arc protective device for hanging cables according to the patent of the Russian Federation 2197050, publication 01/20/2003 with two fixed electrodes, one of which in the form of a horizontal rod is equipped with a plastic insulating coating for protection against birds. The protective device is imperfect in view of the fact that the contact areas of the electrodes are directly open, and its design is conditionally universal, since the electrode inside the non-deformable coating is made with the ability to change the height and length of the electrode.

Known protective structure that ensures the safety of birds on power lines according to the patent of the Russian Federation 2081491, publication 10.06.1997. The protective device is made in the form of a comb with plastic teeth, mounted on a support beam with the teeth located above insulators with wire knitting wires. The teeth are angled horizontally, suggesting that birds do not sit on such unstable surfaces. The device has low reliability with respect to protection against birds and from pollution, as live parts of wires remain open.

The closest invention is the patent Fr 2167275, publication 24.08.1973. According to the patent, the power line protection device from birds is used on poles with pin insulators. The device as a means of protecting the insulator itself and parts of the wires is a cylindrical cover for the upper part of the insulator, tangentially connected to the sheath, having a U-shaped cross section on some part of the sheath length so that the sheath can be worn on wires fixed to the insulator, and to tighten the free ends along the entire length of the shell to a part of the height of the open ends. To extend the end-to-end protector, an additional sheath without a cover is installed. The casing and the lid, as well as the means of securing the additional casing (such as rivets) are made of PVC insulation material, rubber, plastic, suitable for all-weather conditions.

The device does not provide reliable protection of insulators due to its unreliable fastening. The wires are freely placed inside the rectilinear channel formed by the sheath. At the place of fastening on the insulator, the wires are subject to the greatest deformation under the action of gravity, wind, temperature, etc. The deformation forces on both sides of the rectilinear sheath are converted into shear forces, which increase when additional shells are built up. Slight rocking of the wires will lead to a shift of the cover, and returning it to its original position is all the more difficult the denser the cover is placed on the insulator. The installation of the device requires professional skills to create an internal channel for the wire and obtain a flat clamp on a part of the height of the U-shaped sheath.

The technical task of the invention is to increase the reliability of the protective device, increase the reliability of bird protection against contact with live parts of power lines and simplify the installation of a protection device on power lines.

A protection device on a power line using supports with pin insulators is disclosed, comprising means for protecting the insulator and parts of wires fixed to the insulator made of electrical insulating material. Unlike the prototype, the device is made of three detachable parts, open from the bottom, in the form of casings-channels with a transverse ∩-shaped section and a glass-like casing of the middle part, made with the possibility of placing an insulator in it and having a common internal volume with transition sections-channels, which fastened to the casing-channels by imposing the extreme sections and combining the through grooves in their upper part; casings-channels in mutual position and internal volume are made with the possibility of free placement of wires twisted on the insulator in them, as well as casings-channels have a corrugated surface on the channel part, mating with the middle part, and through grooves in the upper part of the extreme sections of the device; an elastic latch in the form of a stud with a shoulder belonging to a flat spring latch located inside the casing-channel with outward diverging ends is inserted into all through grooves from the inside.

The transition sections-channels of the glass-like casing can be placed approximately tangentially to it or approximately in the plane of its axial symmetry, depending on the type of fastening of the wires to the insulator for which the claimed device is intended. The glass-like casing is made with the possibility of placing in it mainly the upper part of the insulator so that the open wires are inside the casing. When placing the sections of the channels tangent to the glass-like casing, it is advisable to make the glass-like casing or part of it fully against the insulator skirt.

The invention is illustrated by drawings. Figure 1 presents an axonometric image of the device. Figure 2, 3 shows a top view of two types of execution of the device. Figure 4 illustrates the connection of the parts of the casings using latches.

The protection device is intended for use on power lines with supports 1 and pin insulators 2, mounted on consoles 3. The device consists of three detachable parts in the form of casings open from below. The glass-like casing 4 of the middle part is designed to accommodate the insulator 2 in it, at least with the possibility of overlapping open wires 5. The lower part of the insulator is electrically safe and can be opened.

The glass-like casing has a common internal volume with transition sections-channels 6, in which wires 5 are twisted on an insulator. The transition sections of the channels can be placed approximately tangentially to the glass-like casing (Fig. 2) or approximately in the plane of its axial symmetry (Fig. 3), depending on the type of fastening of the wires to the insulator for which the claimed device is intended. When placing the transition sections of the channels tangent to the glass-like casing, it is advisable to make the glass-like casing or part thereof (Figs. 2, 4) until it stops with the insulator skirt 7. The support in the form of part 8 of the surface of the casing 4 should be located in the region 9 (figure 2) of the symmetry of the device corresponding to the interface between the two transition sections of the channels and the glass-like casing. This will ensure the stability of the protection device when birds are placed on the casing, bearing in mind the displacement of the center of gravity of the casing with respect to the center line of the channels with wires.

The casing-channels 10 and 11 are also open from below and have a transverse ∩-shaped section. Transitional sections-channels 6 of the glass-like casing 4 of the middle part are fastened to the casing-channels 10 and 11 by superimposing the outer sections and combining the through grooves 12 in their upper part. Through grooves 13, 14 are also made in the upper part of the outermost sections of the casing-channels 10, 11. An elastic latch 15 is inserted into the grooves, for example, in the form of a stud with a shoulder (Fig. 4), made integral (or rigidly fastened) with a flat spring latch 16, which is inserted from the inside of the channel. The latch 16 is designed for the rapid assembly of parts of the device and for the operational fastening of the protection device to the wires. When the shells are fastened together, its annular part is inside the ∩-shaped channel, and the diverging ends 17 are located outside the casing, spaced 20-30 cm apart and serve to catch and guide the wire into the latch 16 and hold the wire inside the casing.

The part of the casing-channel, combined with the middle casing, is corrugated to give flexibility to the casing, which is laid on the wires most curved near the insulator. This increases the reliability of the placement of wires inside the casings of the protection device.

The device is made of an insulating material, which must also meet the requirements of strength, durability under different conditions of humidity, temperature, etc. As a material for the manufacture of the inventive device can be used, for example, propylene or light stabilized polyethylene. A similar material is used in the manufacture of self-supporting insulating wires of the SIP-3 brand. The inventive design can be applied to different insulators used on power lines 6-10 kV and for different types of fastening of wires on the insulator.

The device in assembled form is installed on insulators, for example, using a pole, without auxiliary lifting equipment, which allows it to be mounted in difficult, impassable terrain conditions and without disconnecting the power line. The middle part is mounted on the insulator, and the wires are led to the four latches and inserted under the interference into the latches 17, which at four points reliably hold the wire inside the casing along its entire length even when the wires are swayed and bent due to the use of corrugated parts. Closed live parts of power lines at a distance of 60-70 cm from the insulator ensure the safety of birds that sit on grounded traverses (consoles) near the wires attached to the pin insulators.

Claims (5)

1. A protection device on a power line using supports with pin insulators, comprising means for protecting the insulator and parts of wires fixed to the insulator made of electrical insulation material, characterized in that the device is made of three detachable parts open from below, in the form of casing-channels with a cross ∩-shaped section and a cup-shaped casing of the middle part, made with the possibility of placing an insulator in it and having a common internal volume with transitional sections-channels, which Lena with housings channels by superimposing and aligning the edge portions through slots in their upper portion; casings-channels in mutual position and internal volume are made with the possibility of free placement in them of wires twisted on an insulator, as well as casings-channels have a corrugated surface on the part of the channel, mating with the middle part, and through grooves in the upper part of the extreme sections of the device, all through grooves are threaded from the inside by an elastic latch in the form of a stud with a shoulder belonging to a flat spring latch located inside the casing-channel with the ends diverging outward. 2. The device according to claim 1, characterized in that the transition sections are approximately tangent to the glass-like casing. 3. The device according to claim 1, characterized in that the transition sections are located approximately in the plane of axial symmetry of the glass-like casing. 4. The device according to claim 1, characterized in that the glass-like casing is made with the possibility of placing an insulator in it, at least to the height of the overlap of the open wires. 5. The device according to claim 1, characterized in that the glass-like casing or part thereof is made up to the stop with the insulator skirt.

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