RU175739U1 - TENSION CLAMP - Google Patents

Abstract

The utility model relates to the field of electric power, and more specifically to tension clamps for two- or four-core insulated wires of overhead power lines with voltage up to 1 kV. The tension clamp consists of two cheeks 1, two parts (dies) 2 located between the cheeks 1 and made of a polymer composite material. The dies 2 have grooves 3 designed to accommodate insulated conductors of wires 4. The clamp also includes a bolt connection 5, by means of which the cheeks 1 and parts 2 are combined into one unit, a fastening v-shaped bracket 6 for connection with brackets or hooks on the supports of overhead power lines. At the ends 7 of the bracket 6, thickenings 8 are made, which are fixed in the holes 9 of the cheeks 1. The holes 9 in the cheeks 1 have a rectangular or oval shape and are extended, for example, along the longitudinal axis 10 of the wire 4, and the thickenings 8 at the ends 7 of the fastening v-shaped the brackets 6 repeat the shape of the holes 9 so as to freely enter into them in a certain position of the bracket 6, allotted from the longitudinal axis 10 of the wire 4 by an angle in the range from 60 to 120 degrees. The inventive tension clamp for securing two- or four-core insulated wires of overhead power transmission lines with voltage up to 1 kV is characterized by higher operational reliability compared to the known tension clamp of a similar purpose due to the stronger adhesion of the mounting bracket to the clamp cheeks (due to the rectangular or oval shape of the holes in cheeks, and thickenings at the ends of the mounting bracket repeat their shape, freely entering them without disengagement when the bracket is removed from the longitudinal axis of the wire at n ranging from 60 to 120 °). 3 ill.

Description

The utility model relates to the field of electric power, and more specifically to tension clamps for two- or four-core insulated wires of overhead power lines with voltage up to 1 kV.

Known tension clamp for attaching the wires of overhead power lines, comprising a housing with a profiled curved groove made convex-concave in the lower tail, a clamping element and an eye, characterized in that in order to increase reliability by providing the necessary efforts to seal the wire, reduce material consumption and costs for manufacture, the upper tail of the housing is made with a convex-concave groove corresponding to the convex-concave groove of the lower tail, the clamping element is it is filled in the form of a flat die, on the lower and upper surface of which it is made by a convex-concave groove extending at the ends, each of which corresponds to a selectable range of fixed wires [1].

This tension clamp has a rather complicated housing (a housing with a profiled curved groove made convex-concave in the lower tail part), which significantly increases the cost of the manufacturing process of such clamps and makes it difficult to use it for fixing self-supporting insulated wires.

The closest technical solution in relation to the proposed one is a tension clamp for an insulated air cable, which contains two metal parts of the housing, between which are plastic parts having sections made in the form of grooves for receiving the ends of the wires between the plastic parts, a clamping bolt for compressing metal housing parts and plastic parts between them in the direction of each other to secure the ends of the wires between the plastic parts, and a tension bracket that provides hanging the clamp with a grip on a hook or other fastening means on a wall or post; from both metal parts of the housing, an eye for the tensioning bracket retreats, in which an elongated hole of variable width is made, at the ends of both branches of the tensioning bracket are thickened sections having such dimensions relative to the locking holes that they can pass through the locking holes only at their wider end, its own tension of the tensioning bracket provides the clamp branches of the bracket to the eyes [2].

The reliability of this tension clamp during operation is insufficient, since at large angles of staple deviation from the longitudinal axis of the wire (from 60 to 120 degrees, which has a fairly frequent place on overhead power lines), thickenings at the ends of the staple will slip out of wide sections of elongated holes in the cheeks leading to the release of the clamp.

The applicant set himself a specific task, namely to improve the design and technological characteristics of the above tension clamp, which is the closest analogue (prototype) to the proposed technical solution, in terms of significantly increasing its operational reliability. This positive technical result was achieved due to a new set of essential design features of the tension clamp made in accordance with this utility model presented in the following utility model formula: “tension clamp for two- or four-core insulated wires of overhead power lines with voltage up to 1 kV, consisting of two cheeks made of metal, at least two parts located between the cheeks and made of a polymer composite material, with gutters for To place insulated wires of wires in them, at least one bolt connection combining the cheeks and the aforementioned parts into one block, and a fixing v-bracket for connecting with brackets or hooks with thickenings at the ends, fixed in the holes of the cheeks; the holes in the cheeks have a rectangular or oval shape, and the thickenings at the ends of the mounting v-shaped bracket repeat the shape of these holes so as to freely enter them in a certain position of the bracket, diverted from the longitudinal axis of the wire by an angle in the range from 60 to 120 degrees ".

The essence of the utility model is illustrated by drawings, where in FIG. 1 shows a tension clamp made in accordance with the present utility model, a front view perpendicular to the wire of the overhead power line; in FIG. 2 is the same as in FIG. 1 is a side view without a tension bracket along an overhead power line wire; in FIG. 3 is the same as in FIG. 1, a top view of the fastening of the end of the tensioning bracket in the jaw of the clamp.

The proposed tension clamp for two- or four-core insulated wires of overhead power lines with a voltage of up to 1 kV consists of two cheeks 1, two parts (dies) 2 located between the cheeks 1 and made of a polymer composite material. The dies 2 have grooves 3 designed to accommodate insulated cores of wires 4. The clamp also includes a bolt connection (threaded bolt) 5, with which the cheeks 1 and the parts (dies) 2 are combined into one unit, a fixing v-shaped bracket 6 for connecting to brackets or hooks on towers of overhead power lines (not shown). At the ends 7 of the bracket 6, thickenings 8 are made, which are fixed in the holes 9 of the cheeks 1. The holes 9 in the cheeks 1 have a rectangular or oval shape and are extended, for example, along the longitudinal axis 10 of the wire 4, and the thickenings 8 at the ends 7 of the fastening v-shaped the brackets 6 repeat the shape of the holes 9 so as to freely enter into them in a certain position of the bracket 6, allotted from the longitudinal axis 10 of the wire 4 by an angle in the range from 60 to 120 degrees.

The inventive tension clamp for fixing two- or four-core insulated wires of overhead power transmission lines with voltage up to 1 kV is characterized by higher operational reliability in comparison with the known tension clamp of a similar purpose, which is the closest analogue to the proposed one, due to the stronger adhesion of the mounting bracket to the cheeks clamping (due to the rectangular or oval shape of the holes in the cheeks, and the thickenings at the ends of the mounting bracket repeat their shape, freely entering into x without disengagement when the bracket is removed from the longitudinal axis of the wire by an angle in the range from 60 to 120 degrees).

Information sources

[1] Description of the invention to copyright certificate No. 1117755 “Tension clamp”, H02G 7/02, claimed 13.09.83, published 07.10.84.

[2] Description of the invention to patent No. 2233523 "Tension clamp for insulated air cable", H02G 7/02, claimed September 14, 2000, published July 27, 2004

[3] Description of the invention to copyright certificate No. 1762364 “Tension clamp for securing overhead power line wires”, H02G 7/02, claimed 05.17.1990, published 09.15.1992.

[4] Description of the invention to copyright certificate No. 639068 “Tension clamp”, H02G 7/02, claimed 01.09.77, published 25.12.78.

[5] German patent No. 2504680 A1 “Tension clamp”, H02G 7/02, published 08/19/1976.

[6] German Patent No. 1077286 A2 “Tension Clamp”, H02G 7/02, published 03/10/1960.

[7]. "Insulators and fittings of overhead power lines and open switchgears." Catalog. Vneshtorgizdat, ed. No. 560067 1976, p. 110, p. 106.

Claims (1)

Tension clamp for fastening two- or four-core insulated wires of overhead power lines with voltage up to 1 kV, consisting of two cheeks made of metal, at least two parts located between the cheeks and made of polymer composite material, with gutters for placement of insulated cores of wires of at least one bolt connection combining the cheeks and the aforementioned parts into one block, and a mounting v-bracket for connecting with brackets or hooks with thickenings at the end x, fixed in the holes of the cheeks, characterized in that the holes in the cheeks have a rectangular or oval shape, and the thickenings at the ends of the mounting v-shaped bracket repeat the shape of these holes so as to freely enter them in a certain position of the bracket, allotted from the longitudinal the axis of the wire at an angle in the range from 60 to 120 °.

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