RU2714449C1 - Clamp for attachment of short-circuit indicator (sci) to overhead power line wire - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: clamp for fixation of short-circuit indicator (SCI) on wire of overhead transmission line installed in upper part of SCI housing, contains two brackets: clamping and thrust, intended for covering and holding between them wire of overhead transmission line. Brackets are installed on axes fixed on the clamp base, and have the possibility of rotation on these axes, at that, the clamping bracket is equipped with a spring intended for movement of this bracket to the support bracket, support bracket is provided with a spacer rod-lug capable of retaining the thrust clamp from the clamping bracket at a distance which enables the wire to enter the clamping space of the staples, and thrust clamp is equipped with folding thrust lever holding it in fixed position relative to clamp base in position "SCI on wire". At that, in "SCI on the wire" position between the clamping bracket and the stop on the clamp base there is a gap allowing the staple bracket to turn off when the folding stop lever is turned upwards due to the force developed by the clamping bracket.

EFFECT: simple process of installing a short-circuit indicator (SCI) on a high-voltage transmission line, high reliability of its attachment due to creation of a large compression force of the clamp on the wire with insignificant force during attachment and removal, as well as simplification of manipulations when securing and removing using an insulating rod.

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Description

The invention relates to the field of electric power and can be used to install a short circuit indicator (ICZ) on an overhead power line wire (VLEP).

The prior art clamps for ICZ of various types, which can be installed on the VLEP wire without cutting off the current supply, using insulating rods.

In particular, the Astron 7080 type IKZ clamp consists of two swivel brackets, which, when installed in the insulating rod glass, are opened and held open until the insulating rod glass brackets are installed on the VLEP wire. When the clamp is connected to the wire, the fitter presses the clamp bed against the wire with a force from the bottom to the top, while the gripping holding brackets in the diluted state disengage from the bar gripping brackets and the clamp brackets tightly enclose the wire.

When removing the IKZ from the wire, the grip of the rod catches the IKZ entered into it and the fitter removes the IKZ from the wire by moving the rod down. In this case, the applied force for removing the ICZ from the wire is approximately 30 kg s (300 N) [1].

Also known is the Anthrax ICZ, adopted for the prototype, which clings to the wire using one clamping bracket, pressing the wire to the clamp base, which is part of the ICZ housing.

When installing such an ICZ on the wire using an insulating rod, the fitter moves downward, overcoming the compression force of the clamping bracket, squeezes it from the base and pushes the wire inside the clamp to the lodgement with screw reciprocating movements.

When removing the IKZ from the wire, the fitter presses down the clamp bracket with a downward force, lowers the IKZ body with a tool tray and, with screw reciprocating movements, removes the wire from the IKZ clamp [2].

When removing the ICZ from the wire, it is necessary to exert great efforts, since it is still necessary to overcome the effect of “sticking” of the surfaces of the brackets to the wire, which appears due to their long stay in a compressed state.

In both cases, the process of installing the IKZ on the wire, as well as removing the IKZ from the wire, not only requires great physical exertion from the contractor, but is also difficult to perform and creates an increased risk of injury when working at height.

The technical result to which the claimed invention is directed is to simplify the process of installing an IKZ on a VLEP wire, increase the reliability of its fastening by creating a large compression force of the clamp on the wire with little effort when fixing and removing, as well as simplifying the manipulations when fixing and removing using insulating rods.

The claimed technical result is achieved by the fact that the clamp for attaching a short circuit indicator (IKZ) to the overhead power line wire installed in the upper part of the IKZ body according to the invention contains two brackets: a clamp and a stop, designed to grasp and hold between them the wires of the overhead power line . The brackets are mounted on axes fixed on the base of the clamp and can be rotated on these axes, while the clamping bracket is equipped with a spring designed to move this bracket towards the stop bracket, the stop bracket is equipped with a spacer guard that can hold the stop bracket from the clamp bracket on distance, allowing the passage of the wire into the clamping space of the brackets, and the stop bracket is equipped with a folding stop lever, which keeps it stationary relative to the base Benches in the "ECI on the wire." At the same time, in the “ICZ on the wire” position, there is a gap between the clamp bracket and the stop on the base of the clamp, which allows the stop bracket to be moved when the folding stop lever is turned upward due to the force developed by the clamp.

In FIG. 1 schematically shows a clip for attaching a short circuit indicator (ICZ) to an overhead power line wire: in a state before installing an ICZ on a wire; in FIG. 2 - ICZ installed on the wire; in FIG. 3 - the clamp is in the state of removal from the wire; in FIG. 4 - insulating rod with a glass for installation and removal of ICZ.

The proposed clamp for the installation of the ICZ consists of a base 1, to the lower part of which the housing 2 of the ICZ is attached. In the upper part of the base 1 on the axes 3 and 4, two brackets are mounted around them - clamping 5 and stop 6. The stop bracket 6 is equipped with a gatehouse 7 fixed on the axis 8. At the bottom, the stop bracket 6 rests on the end of the hinged stop lever 9 A coil spring 10 is mounted on the axis 3, acting on the movable bracket 5. The base of the clamp 1 is provided with a stop 11 for the clamp bracket 5. On the insulating rod 12, a cup 13 is strengthened, the upper edge 14 of which is provided with a recess 15.

The clamp works as follows. Before installing the IHC on the VLEP wire 16 (Fig. 1), the stop bracket 6 is set to the stop position in the short shoulder of the folding stop lever 9. The spiral spring 10 is cocked by the clamping bracket 5 and fixed in this position by placing the gate 7 in the stop position at the stop on clamping bracket 5.

IKZ is installed in the glass 13 of the insulating rod so that the protruding shoulder of the folding stop lever 9 is located in the region of the recess 15 of the edge 14 of the glass 13 (Fig. 2) and does not touch the upper edge 15.

By lifting the insulating rod up, the fitter inserts the wire into the space between the brackets 5 and 6, and, continuing the upward movement, presses the wire with the gatehouse 7. The gate 7 jumps from the stop position to the clamp bracket 5, releases it, and the latter presses the wire against the stop bracket 6 (Fig. 2). By moving "down" the insulating rod is removed, and the ICZ remains hanging on the wire 16 - the position of "ICZ on the wire."

In the “ICZ on the wire” position, between the clamping bracket 5 and the stop 11 of the base 1 there remains a small gap “A”, which allows the stop bracket 6 to be moved away from place when the tilt stop lever 9 is turned up, since in this case the entire force of the spring 10 will be transmitted by the bracket 5 through the wire to the bracket 6 to rotate about the axis 4.

When removing the ICZ from the wire (Fig. 3), the upper edge 14 of the glass 13 of the insulating rod 12 is located opposite the tilting stop lever 9. By moving the rod “up”, the housing of the ICZ is inserted into the glass 13 of the rod 12, and the upper edge 14 of the glass 13 is pressed by continuing the movement “up” on the protruding shoulder of the hinged thrust lever 9, the lever arm is rotated upward, releasing the thrust bracket 6. In this case, due to the gap between the surface of the clamping bracket 5 and the stop 11 of the base 1, the spring 10, by means of the bracket 5, gives the initial push of the thrust bracket 6 for folding of it from the wire, whereupon ECI under its own weight into a glass rod is lowered and removed from the wire.

Literature.

[1] - “OKB ASTRON. VLEP ASTRON-7080 short circuit detection tool. Manual. ALCIA. 425148.001 OM. Moscow 2009 ”;

[2] - Installation of Anthrax ICZ without disconnecting the line voltage https://youtu.be/xe0Ej15pJVY

Claims (1)

A clip for attaching a short circuit indicator (IKZ) to an overhead power line wire installed in the upper part of an IKZ case, characterized in that the clip contains two brackets: a clamp and a stop, designed to grasp and hold between them the wires of the overhead power line, the brackets are mounted on axes mounted on the base of the clamp, and can be rotated on these axes, while the clamping bracket is equipped with a spring designed to move this bracket in the direction of the thrust bracket, thrust bracket equipped with a spacing rod-guard that is able to hold the stop bracket from the clamping bracket at a distance that allows the wire to pass into the clamping space of the brackets, and the stop bracket is equipped with a folding stop lever that keeps it stationary relative to the base of the clamp in the "ICZ on the wire" position, in the “ICZ on the wire” position, there is a gap between the clamp bracket and the stop on the base of the clamp, which allows the stop bracket to be removed from place when the hinged stop lever is turned upward Thu force developed clamping bracket.

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