RU199222U1 - TENSION CLAMP FOR INSULATED AIR CABLE - Google Patents

Abstract

The utility model relates to a tension clamp for an insulated overhead cable, in particular an overhead cable of a bundle assembly. Wedge-shaped plastic parts are located between the galvanized metal strips of the body, between which the ends of the cable wires are clamped by means of a clamping furniture bolt with a rectangular fixation, a spring washer and a nut. There is an eyelet at the ends of both galvanized metal strips, i.e. extended obturator of variable width. At the ends of the tension bracket, which is inserted into these lugs, made of galvanized wire, thick bullets are made, which pass through the locking holes only at their wider end and then are fixed against falling out. As a result, it is possible to use a tension clamp with a multicore cable and reduce the cost due to the simplicity of mutual fastening and the cheapening of manufacturing. f-ly, 15 ill.

Description

The utility model relates to the field of electric power engineering, namely to devices for an insulated overhead cable, in particular an overhead cable of a bundle assembly, representing a tension clamp. H. Technique tier

The closest technical solution in relation to the proposed one is a utility model patent RU No. 175739 U1 "TENSION CLAMP", copyright holder SOCIETY WITH LIMITED LIABILITY "MZVA" (LLC "MZVA") (RU), which is a tension clamp for an insulated overhead cable, к for two- or four-core insulated wires of overhead power lines with voltage up to 1 kV. The tension clamp consists of two cheeks, two parts (dies) located between the cheeks and made of polymer composite material. The dies have grooves designed to accommodate insulated conductors. The design of the clamp also includes a bolted connection, with the help of which the cheeks and parts are combined into one unit, a fastening V-shaped bracket for connection with brackets or hooks on the poles of overhead power lines. At the ends of the staples, thickenings are made, which are fixed in the holes of the cheeks. The holes in the cheeks have a rectangular or oval shape and are elongated, for example, along the longitudinal axis of the wire, and the bulges at the ends of the V-shaped mounting bracket repeat the shape of the holes so that they freely enter them in a certain position of the bracket, retracted from the longitudinal axis of the wire to an angle ranging from 60 to 120 degrees. The claimed tension clamp for securing two- or four-core insulated wires of overhead power lines with a voltage of up to 1 kV is characterized by higher operational reliability in comparison with a known tension clamp of a similar purpose due to a stronger adhesion of the fastening bracket to the jaws of the clamp (due to the rectangular or oval shape of the holes in cheeks, and the thickenings at the ends of the fastening bracket repeat their shape, freely entering them without disengaging when the bracket is moved away from the longitudinal axis of the wire at an angle in the range from 60 to 120 °).

The reliability of this tension clamp during operation is insufficient, since at large angles of deflection of the bracket from the longitudinal axis of the wire (from 60 to 120 degrees, which is quite common on overhead power lines), the thickenings at the ends of the bracket will slip out of wide sections of elongated holes in the cheeks causing the clip to disengage.

The disadvantage of this device is its narrow focus, namely, this tension clamp is intended exclusively for two- or four-core insulated wires of overhead power lines with voltage up to 1 kV.

4. Disclosure of the utility 4.1. The task of the utility model

The technical task of the presented utility model is to expand the frequency spectrum, which allows the use of one type of vibration damper spacer in different conditions. As a result, the device is a universal structure of a vibration damping strut that is insensitive to the installation site, as a result, the degree of vibration damping of the wires will not depend on the accuracy of the installation location of the damping unit in the span of the supports

4.2. Technical result

The technical result consists in the fact that this device relates to a tension clamp for an insulated air cable, in particular an air cable of a bundle assembly, and the tension clamp contains two galvanized metal strips, between which plastic parts are located, having a bed in the form of a groove with protruding ring-shaped clamps for fixing the ends of the wires between the plastic parts, a clamping furniture bolt with a rectangular fixation against rotation to compress the parts of the metal plates and the plastic parts located between them in the direction of each other to fix the ends of the wires between the plastic parts and a clamping clamp connected with the clamp, with which the clamp can grip any fastener on a wall or post.

In tension clamps of this type, previously used by the applicant, plastic parts are molded around the ends of the bracket and receiving spaces are provided in the housing for these plastic parts. Such a device is suitable for use with low tensile loads, for example, for connecting a single wire of small diameter. With thicker, multi-pole wires, Applicant has used an embodiment as a tension clamp in which the plastic parts are molded at the ends of the tension bracket so that these ends extend a great distance into the plastic parts that are placed in the space between the housing parts along the entire length of the housing. Such a device increases the thickness of the clip and, in addition, the clip with fasteners molded around it is an expensive component.

4.3. Implementation of the task

The utility model relates to a tension clamp for an insulated overhead cable. Wedge-shaped plastic parts are located between the metal galvanized strips of the body, between which the ends of the cable wires are clamped by means of a clamping furniture bolt with a rectangular fixation, a spring washer and a nut. There is an eyelet at the ends of both galvanized metal strips, i.e. extended obturator of variable width. At the ends of the tension bracket, which is inserted into these lugs, made of galvanized wire, thick bullets are made, which pass through the locking holes only at their wider end and then are fixed against falling out. As a result - providing the possibility of using a tension clamp with a multicore cable and reducing the cost due to the ease of mutual fastening and cheapening of manufacture.

Also known is the type of tension clamp, in which the body consists of two wedge-shaped parts located one in the other, in the space between which the end of one cable is wedged. The bracket is made of stainless steel wire, both ends of which are fastened in holes in the protruding end of one of the wedge-shaped parts. This tension clamp is also suitable for securing the end of one cable. The use of stainless steel wire has the advantage that the tension clamp can be used in corrosive environments.

In addition to these, the type of tension clamp is also known, in which the metal plate bracket is made of stainless steel wire.

Additional advantages of the proposed utility model are described in the dependent claims of the utility model.

Below, two embodiments of the utility model are described in more detail with reference to the accompanying drawings, in which:

fig. 1, 2 and 3 show a tension clamp related to a first embodiment of the invention, shown from the side, back and top;

fig. 4, 5 and 6 show a tension clamp related to a second embodiment of the invention, shown from the side, rear and top.

fig. 7, 8, 9, shown from above, in section and from below, show the plastic part 4 of the tension clamp body, this part being suitable for use in both embodiments of the invention;

fig. 10, 11, 12, shown from above, in section and from below, shows a plastic part 2 suitable for use in a second embodiment of the utility model.

fig. 13, 14, 15 shown from above, in section and from below, shows the plastic part 3 of the tension clamp body, this part being suitable for use in both embodiments of the invention;

The tension clamp according to both embodiments of the invention comprises two galvanized metal plates 1 of the housing, between which the plastic parts 2, 3, 4 are located, having a groove-shaped bed for receiving the ends of the wires between the plastic parts 2, 3, 4 or between the plastic parts 3, 4. The embodiment of the utility model shown in FIG. 1, 2, 3 are suitable for use with two-wire cables and the embodiment of the invention shown in FIG. 4, 5, 6, suitable for use with 3 or 4 wire cables. The clamping furniture bolt passes through the parts 1 of the body and the plastic parts 3, 4 (and possibly 2) located between them to compress the parts in the direction of each other to secure the ends of the wires between the plastic parts, With the help of the tension bracket 6, the clamp can grip a hook or other fastening means on the wall go to the pillar.

At the end of both parts of the galvanized metal plates 1 there are locking holes in the form of a keyhole of varying width. A bracket is threaded through the larger hole, moves towards the smaller hole and is fixed against falling out under the influence of its own weight and tension.

With the described design of the tension clamp, a single-core galvanized steel wire can be used as the tension clamp 9.

In the described embodiments of the invention, the housing parts and the plastic parts are connected to each other by means of a furniture clamping bolt 8 with a rotation lock, a spring washer and a nut.

The grooves are made in the form of protruding grips with a fixed pitch and pointed at the ends to securely fix the wire.

The edge of the grooves is made in the form of a hemisphere, which will allow taking the tension force applied to them by the wire and not deforming this wire. In this case, the surface material of the wire wedges in the direction of the central region, that is, the bottom of the grooves, and enters under pressure into the grooves. This, together with the lengthening of the groove gripping line, results in significantly better retention than sharp grooves located in a normal plane perpendicular to the longitudinal axis of the groove. An acute angle breaks the outer sheath of the wire.

Claims (10)

1. Tension clamp for insulated air cable, which contains two galvanized metal plates, between which plastic parts are located, having a bed made in the form of grooves to receive the ends of the wires between the plastic parts, a clamping furniture bolt with fixation against rotation, a spring washer and a nut , for compressing galvanized metal parts of the housing and plastic parts between themselves in the direction towards each other for the subsequent fastening of the ends of the wires between the plastic parts, and a clamping bracket, which provides the clamp with hanging with a grip on a hook or other fastening means on a wall or post, characterized in that directly in the metal galvanized plates themselves, elongated locking holes of varying width are made, at the end of the tension bracket there are thickened elements having such dimensions relative to the locking holes that ensure their passage through the locking holes only in their wider place, in fact the tension of the clamping bracket ensures the clamping of the bracket branch to the lugs, while the plastic parts abutting against the galvanized metal plates have a wedge-shaped configuration in the direction of tension of the clamping clamp so that the plastic parts expand in the direction of the clamping clamp, the through hole for the clamping bolt is made elongated in In the direction of tension, on one side of the through hole made in the plastic part for the clamping bolt to pass therethrough, there is a protruding collar, and on the opposite side of the through hole in a corresponding place there is a recess that receives the collar of the adjacent plastic part. 2. A clamp according to claim 1, characterized in that the locking holes are made narrowed in the direction of the outer ends of the lugs, simultaneously with the metal galvanized plates, the ends of the tension bracket are bent so that the ends are directed away from each other. 3. Clamp according to any one of paragraphs. 1 and 2, characterized in that galvanized metal plates and plastic parts are connected to each other by means of a furniture clamping bolt with a rectangular anti-rotation lock, a spring washer and a nut. 4. Clamp according to any one of paragraphs. 1 and 2, characterized in that the tension bracket is made of galvanized wire. 5. Clamp according to any one of paragraphs. 1-4, characterized in that between the two plastic parts there is a third plastic part, on both opposite sides of which there is a bed made in the form of a groove. 6. Clamp according to any one of paragraphs. 1, 2, 4 characterized in that directly in metal galvanized plates for the installation of thickened sections of the ends of the staple in the region of the narrower end of the locking holes, the recesses and locking holes are located and configured relative to each other in such a way that when the tension clamp is assembled and in the working position, the tension bracket is fixed in place of its installation without the possibility of removal. 7. Press according to any one of paragraphs. 1-6, characterized in that on the bottom of the bed, made in the form of a groove, protrusions in the form of a hemisphere are made. 8. The clamp according to claim 7, characterized in that the edges of the grooves are blunt to the top at the point of contact of the tension clamp with the wire. 9. Clamp according to any one of paragraphs. 7 and 8, characterized in that the concave side edge of the grooves or the inner edge blunt towards the top is located on the side facing the tension bracket and receives all the tension force applied to it by the wire. 10. Clamp according to any one of paragraphs. 7-9, characterized in that the magnitude of the acute angle between the plane of curvature of the grooves and the normal plane of the sections is completely absent.

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