SU1119113A1 - Versions of apparatus for preventing of phase wires of aerial power line - Google Patents

Abstract

1. A device for preventing the wires of the overhead power line phases from collapsing with voltage up to 1000 V, containing an insulating element with nodes and fastening wires at the ends, characterized in that, with a circuit to simplify the design, improve reliability and protect the wires from damage, each of the fastening nodes made in the form of a longitudinal groove under the wire at the ends of the insulating element and the elastic liner located in the specified groove above the wire.

Description

2, A device for preventing wire splicing of phases of overhead power lines with voltage up to 1000 V, containing an insulating element with insulating material terminators with ribs at the ends, in which fastening points for wires are formed, characterized in that In order to preempt the construction, increase the reliability and protect the wires from damage, each of the attachment points is made in the form of a longitudinal groove for the wire in the terminator and an elastic insert located in the specified groove above the wire.

The invention relates to electrical engineering, in particular to the protection of power lines with voltages up to 1000 V from emergency shutdowns due to overlapping of wires.

Devices are known for preventing the splitting of the wires of the phases of overhead power lines, made in the form of an ashura or a cable made of an insulating material lj

The disadvantage of these devices is the relatively low mechanical strength, especially at the points where the devices are attached to the wire, where they quickly grind. In addition, these devices have an extremely stable rack: partial discharge, which leads to a decrease in electrical strength.

Also known are devices for preventing the wire from slipping, including V-shaped stretching, metal fittings and clamps attached to the bottom two wires (triangular arrangement of phase wires: two at the bottom and one at the top) 2

However, these devices are too complex in design. In addition, metal end caps with grip fray wire.

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The closest in technical solution to the present invention is a device for preventing clinging. conductors of the phases of overhead transmission lines containing an insulating element with nodes for fastening the wires at the ends. The insulating element is made in the form of fiberglass reinforcement rod with porcelain tips with ribs 3j.

Using this device greatly protects the wire from chafing.

However, this device had drawbacks: known fiberglass rods are manufactured using relatively complicated technology using scarce materials and equipment, porcelain tips are fragile, often broken both during manufacture and during installation and operation, the wire is attached to the porcelain tip using a wire The cables are very unreliable and neutral, the wire in the places of bends near the porcelain tips can be damaged by vibrations, due to rigid attachment and lack of akogo a damping device on the wire is subjected to a forward impact viratsy and other overloads, which ultimately leads to the wear of the wire.

The aim of the invention is to simplify the construction, increase the reliability and protect the wires from damage.

This goal is achieved in that according to the first embodiment, in the device for preventing the wires of the phases of overhead transmission lines from clashing up to 1000 V, containing an insulating element with nodes for fastening the wires at the ends, each of the attachment points is made in the form of a longitudinal groove for the wire at the ends of the insulating element and elastic liner. located in the specified groove above the wire. According to the second embodiment, in the device for preventing the overlapping of the wires of the phases of overhead power lines and a voltage of up to 1000 containing an insulating element with terminators of insulating material with edges at the ends in which the attachment points for the wires are formed, each of the attachment points is made in the form of a longitudinal the groove for the wire in the fitting and the elastic insert, located in the specified groove above the wire. FIG. 1 shows a device according to an I variant, a section (only one end of the rod is shown); in fig. 2 is one of the modifications of the device according to the Invariant, a section (only one end of the rod is shown) in FIG. 3 shows a second modification of the device according to variant II, open cut (only one end of the rod is shown) in FIG. 4 shows a section of a transmission line with wires suspended vertically under each other, the lower of which oscillates under the influence of falling ice deposits; in fig. 5 - section of the electric power supply line with the proposed device, installed between the lower and middle wires located one above the other. The device according to variant I (Fig. 1 comprises a rod 1, at the ends of which nodes are formed for fastening the wires 2, made in the form of a slotted slot 3 for the wire 2 into the rod 1 and the elastic plug 4 and the stud 5 passing through the insert 4 The rod is made of wood treated with a polymer, such as polystyrene, or another similar material. The insert is a rectangular elastic plate made of a polymeric material. The device is used on overhead lines with a voltage of preferably 0.38 kV mainly in areas with a low degree of contamination. atmosphere The device for the variant (Fig. 2 contains a rod 1, at the ends of which are formed nodes for fastening the wires 2, made in the form of a longitudinal groove 3 for the wire 2 in the end cap 6 of the insulation material with ribs 7, mounted on the end of the rod 1, and the elastic liner 4 and 134 of the stud 5 passing through the insert 1 4. (1 The length of the leakage current path of the insulating terminators is determined from the formula — the nominal voltage of an overhead line, —the specific length of the leakage path for a given area of application of the devices according to the conditions of pollution of the atmosphere. In areas with a high degree of contamination (IV and above) on wood: the rod is applied strips of conductive material, such as conductive polymer, to bypass wood from large leakage currents. The device is installed in the center of the span of the overhead power line between the two lower wires (referring to the vertical arrangement of the wires). The device is used mainly on HV lines up to 1 kV, including in areas with a polluted atmosphere. The end piece can be made in the form of a polymeric sheath with an annular edge of triangular cross section (Fig. 3). The device works as follows. During a wind or fall of ice formation from the bottom wire, the latter jumps up, but its movement is limited by the proposed device. If there is a rise in the middle wire to the top, then the device holds the middle wire, as it is bonded to the bottom wire. The twitching and vibrations of the wires are damped by inserts made of an elastic polymer material. As shown in FIG. 4, under the influence of falling ice deposits or wind loads, the lower wire, taking up successively ITP-nj, approaches the average and the wires cling. When the proposed device is installed in the middle part of the span, an additional rigidly twisted point appears at which the vibrations subside and, therefore, the wire clutches (Fig. 5) also disappear. Thus, the span is reduced by a factor of 2, and the amplitude of the wire oscillation is reduced. The proposed device is easy to manufacture and install, can be made of cheap non-deficient materials, such as wood, treated with polymer, industrial installation. Enlarging the longitudinal groove in the device, preventing wire clutter, when used together with an elastic liner, significantly simplifies the fixing unit both during manufacture and during operation. As a result of reducing the vibration of the wire, this is achieved by using an elastic liner located in the longitudinal groove of the device above the wire, durability increases, the impact on the wire of bending forces and friction forces is reduced. Friction occurs in a soft material (wood-polymer), i.e. reduced wire abrasion.

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Claims (1)

DEVICE FOR PREVENTION OF LOSSING OF WIRES OF PHASES OF AIR TRANSMISSION LINES OF THE ELECTRIC TRANSMISSION (ITS OPTIONS). (57) 1. A device for preventing the phase wires of the overhead power transmission lines from being pulled together by voltages up to 1000 V, containing an insulating element with knots. For attaching the wires at the ends, with the aim of simplifying the design to improve reliability and protect the wires from damage, each of the attachment points is made in the form of a longitudinal * groove under the wire at the ends of the insulating element and an elastic liner located in the specified groove above the wire.