SU1714736A1 - Method of replacement of dead-end insulator strings on alive aerial power lines - Google Patents

Abstract

The invention relates to the power industry and can be used when replacing the tension wires in the insulators of the air-powered power lines that are under voltage. The goal is to increase productivity and safety, as well as expanding the functionality of the method. An electrician is lifted to the wire 1 of the line in the elevator, at the traverse 5, a clamping device 6 is installed with an insulated rod 7 connected to the wire 1 at the tension clamp 3. At the traverse 5, the mounting unit 8 with the insulated cable 9 is attached. From the crosshead 5 and transferred to the vertical position, the cable 9 intercepts over the top of the arm 4 and is inserted into the mounting block 10 fixed on the wire 1. Then the arm 4 is lowered to the ground for subsequent repair. 1 hp ff. 1 Ill. ^ 5wV4 CJ O > &

Description

The invention relates to electric power industry, and more specifically to methods for replacing tension bearers of insulators on overhead transmission lines under voltage.

There is a known method for replacing defective insulators in four-chain tensioning wires under voltage. A duct with an assembly chair suspended from it, in which there is an electrician, is put on the plates of the isolators of one of the tensioning wires (parallel to the one on which the insulation is to be changed). Movement of the chair along the arm will be inspected by sliding the box over the insulator plates under the weight of the electrician's weight, as well as with the help of insulating cables that electricians pull from the support stand and from the ground. Before delivery of the electrician to the place of replacement of the defective insulator, the load is removed from the defective arm by means of a tensioning device or a jack, to which the arm load is transferred, then the power input is disconnected, after which the st. This device is gently removed by pulling from the bend. The electrician replaces the defective insulators with the help of a lightweight fixer.

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The disadvantage of this method is that. that it is difficult to replace them on three-and double-chained beats, and on single-chained ones it’s generally impossible to 1 on.

Work is possible only on lines of sufficiently high voltage, where the relative proportion of the part of a wire shunted by an electrician is small relative to the entire load, for example, it is impossible for this reason to work on a 110-330 kV overhead line.

The closest technical solution to the present invention is a method of replacing the tension of the wires of insulators on the air lines under transmission, consisting in connecting the insulating rod of the wire from the cross-member support, disengaging the cord from the cross-bar, lowering it to free sagging with the help of an insulated rope, thrown over the mounting block, mounted on the traverse, and the elevator of the electric mo- derer using a lifting device to the level of the line wire. To remove the mechanical load on the defective arm, the insulating rod is fixed between the crosshead and the reinforcement of the defective arm. The defective wire is disconnected from the crosspiece and lowered down until it is free to sag. Repair is done from the metal ladder 2.

The disadvantage of this method is the great laboriousness of traveling on a trolley by wire, the large labor costs for installing a metal ladder, and it is also impossible to replace it from one-circuit wire and it is inconvenient to repair it from a ladder that the electrician has to hang for a long time work with two hands. These disadvantages do not contribute to the spread of this method.

The purpose of the invention is to increase productivity and safety, as well as expanding the field of use.

This goal is achieved by the fact that according to the method of replacing the tension heats;

insulators on overhead transmission lines, which are connected with an insulating rod of a wire from a crossmember, uncoupling the wire from the crosshead, lowering it to free sagging using an insulated rope through the mounting block attached to the crossbar, and lifting an electrician with a lift

devices up to the line wire level, use an additional mounting block, which is attached to the wire behind the tension clamp, after lowering the wire into the free sag of the electrician, is moved, using a lifting device parallel to the defective lead, to the installation site of the tension clamp, insulate the rope through an additional mounting block, we transfer it to the end of the bead at the tension clamp to r the next lowering of the bead to the ground and replace it.

In addition, the insulated cable is re-hooked as a serviceable insulator.

below the defective one, after which the defective insulator is replaced. . The drawing shows a general scheme for replacing the tensioning wire according to the proposed method.

Replacing the tension cables on insulators on overhead transmission lines, and on-line under voltage, in this method, is carried out as follows.

The electrician rises to the wire 1 of the line under voltage in the basket 2 installed on the insulated link of the lift (TV tower) and is placed next to the tension clip 3 of the defective arm 4. The traverse device 6 is fixed on the cross bar 5 (or a jack) to which the insulated rod 7 is connected in series, which in turn is connected to the wire 1 behind the tension clamp 3. On the cross bar 5, an installation block 8 is installed through which the insulated rope 9 passes from the pull winch (mechanism) dockable and defective Girlikh NDU 4. After removal of the load with the defective Girlikh technological command 4 by a clamping ustshystva bdefekuna Arm nda 4 is disengaged from the crosshead 5 and is transferred to the vertical position. Then the basket 2 with the electrician from the upper position is lowered to the lower position. The rope 9 is intercepted over the top of the wire 4 and is inserted into the mounting block 10 secured to the wire 1 near the tension clamp 3, and after disconnecting the wire 4 from the tension clamp. The wire 4 is lowered to the ground for subsequent repair. If it is necessary to replace several defective insulators, the basket 2 occupies a position intermediate between the indicated upper and lower positions opposite the defective insulator 11. In this case, the rope 9 wound up to the mounting block 10 is fixed to the insulator below the defective insulator 11 or the replacement is made with pantographic straps, either with a blocking block or with a lightweight pulley block (not shown).

Claims (1)

This method improves the working conditions, its safety, expands the list of works that can be performed under stress, and reduces labor costs. Invention Formula 1, A method of replacing tension wires in insulators on overhead power lines under connection, consisting in connecting an insulating rod of a wire with a support beam, unhooking the wire in a cross beam, lowering it to free sagging using an insulated rope thrown over the mounting block fixed on the traverse and the lifting of the electrician by means of a lifting device to the level of the wire of the line, which, in order to increase labor productivity and safety, as well as Use areas, use an additional mounting block, which is attached to the wire behind the tension clamp, after lowering the arm into the free sagging, the electrician is moved using a lifting device parallel to the defective hose, to the installation site of the tension clamp, insulate the rope through the additional assembly block It is transferred to the end of the bead at the tension clamp for subsequent lowering of the bend to the ground and replacing it, 2, Method pop, 1, about 1 and 2 with the fact that the insulated cable is re-entangled, for a serviceable insulator of the wire, below the defective one, after which the defective insulator is replaced.