RU2560093C1 - Tension attachment point of optic cable - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: tension attachment point of an optic cable includes a stop and bent metal rod 1 attached to the stop, tension crossbar 2 with two holes for connection to ends of bent metal rod 1. The stop is made in the form of metal plate 3 with a cut, from which there are triangular bends of parts of metal plate 3, which are oriented perpendicular to the plate and located at an angle to each other; with that, metal rod 1 is bent in the middle with formation of an angle between two parts of the rod and rigidly attached to metal plate 3 so that vertex of an angle formed by the rod bend can project beyond its limits with formation of a hoop, and tension crossbar 2 is provided with at least one hole intended for attachment of line accessories.

EFFECT: providing high margin of safety at convenient installation and simple design; possible adjustment of an attachment point as per dimensions of the support.

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Description

The invention relates to the electric power industry, to telecommunications and communications, and can be used for tension mounting a self-supporting optical communication cable on the supports of overhead lines with a V-shaped or triangular profile.

The prior art various tension fastening nodes.

In particular, the UK-N-01 fastener is known, designed for anchoring a self-supporting optical communication cable on OHL towers up to 20 kV of urban electric facilities (street lighting, ground electric vehicles), elements of buildings and structures with a span of up to 110 m. The assembly consists of the shield holder, to which an arc-shaped bracket with a thread at the ends is attached, fixed on the holder with nuts.

Known suspension bracket according to EP 0165370 A1, 1985, containing a tubular element, one end of which is open, and the opposite end is made with a hole for a concentrically located threaded rod, which is made at one end with a guide element fixed by a nut, and on which two ends of the flexible strip are inserted so that the strip forms a ring, while the tubular element is made with at least one longitudinal guide slot, in which the guide element is mounted with the possibility of sliding nt made by at least one protrusion, and the suspension device is provided with a second nut mounted on the threaded rod outside the tubular element from the side of the hole for the passage of the threaded rod so that when the nut is tightened, said guide element can slip in the longitudinal slot of the latter with by tightening the ring made of a flexible strip for reliable fastening.

Known anchor bracket (RU 2391758 C1, 2010) for fastening to the supports of power lines and communication lines of self-supporting insulated wires and optical cables. The bracket is made in the form of a rod bracket of a triangular or other shape, having an eyelet at one end, behind which an anchor clip is attached with a wire or cable, and on the other - shoulders directed towards each other with a gap. The bracket is equipped with a pressure plate made with samples located along the longitudinal axis of symmetry, and an oval hole. By sampling, the shoulders of the plate are put on the bracket and several turns of stainless steel mounting tape are wound on top, with which the bracket is attached to the line supports. The structural strength of the bracket is ensured by the optimal selection of the appropriate geometric dimensions of the bracket and plate.

Utility Model CN 201682244 U, 2010, describes an adjustable tension clamp containing a curved U-shaped metal rod forming two sides of a triangle and made with threaded ends. The metal rod is mounted on a metal plate and attached with threaded ends to the traverse in the form of a support plate with two holes for fastening and tightening the U-shaped metal rod and one hole for attaching the end of the cable.

A device is known for anchoring fastening self-supporting optical cables and insulated wires to the supports of overhead communication and transmission lines (RU 80288 U1, 2009), containing a lanyard, at least two U-shaped brackets with bent shoulders bent along the radius of bend and metal tape clamps covering the support shaft and fastened in the shoulders of the said brackets, while the lanyard is connected via eyelets to the thimble of the spiral tension clamp securing the wire or line cable with the end of the cable suitable for the support, and with a loop h one of the indicated brackets, and the other bracket is connected with its loop part to the thimble of the spiral tension clamp securing the wire or cable with the end of the loop extending from the support. During installation, metal tape clamps are put on the trunk of the line support in a fairly loose fastening, then successively thread the shoulders of U-shaped staples into them and tighten the clamps tightly. Mounted on the ground, for example on an optical cable, the spiral tension clamps are lifted and connected through the eyes of the turnbuckle to a U-shaped bracket and directly to a U-shaped bracket. Next, work is underway to adjust the tension and sag of the cable.

The closest analogue of the invention is a utility model according to the patent of the Russian Federation RU 122210 U1. RU 122210 describes a universal bracket for securing anchor support clamps, containing a U-shaped eye for anchor fastening, the ends of which are fastened by welding to a galvanized steel plate having fastening means to the support in the form of a bolt hole and slots with the function of pulling a mounting tape through them , further comprising a hook for attaching a support clip, wherein the hook is welded to the top of the eye base. The bracket is intended for use as an anchor for a fiber optic cable or a self-supporting insulated wire, as well as for supporting the fastening of a cable or wire.

The analogs described above, including the closest analog, are attached to the supports using a clamp or mounting tape. This mount is designed for use on supports of circular cross section.

The problem solved by the invention is the creation of a tension unit for attaching an optical cable, which can be used on supports of a triangular or V-shaped cross-section of different sizes, has high strength properties, as well as simplicity of design and ease of installation.

The claimed technical solution, as well as the closest analogue, contains a stop and a curved metal rod rigidly attached to the stop. Moreover, the claimed technical solution has the following distinctive features: the presence of a tension beam, the abutment in the form of a metal plate with a cut, mainly along the center line, and the cut edges (bends) bent vertically in the shape of the support section, while the metal plate is rigidly attached to the stop bent in the middle with the formation of two sides of the triangle, a metal rod with a threaded part from the side of both ends, and the metal rod is attached to a metal plate ( ru) so that the top of the formed triangle extends beyond the metal plate (stop) and allows mounting brackets of the type SK, SKD or other linear reinforcement, and the tension beam, forming the third side of the triangle, is made of a profiled corner with two holes for threaded ends metal rod, designed to accommodate the threaded ends of the metal rod, the latter being connected to the traverse by means of nuts, whereby the required force is tightened I stop and traverse. In addition, the tension traverse is made with at least one hole for attaching a bracket of type SK, SKD or other linear reinforcement, and, in the particular case of execution, is equipped with metal profiles designed for interaction (contact) with the surface of the support profile.

The technical result achieved by the claimed invention is to provide a large margin of safety with ease of installation and simplicity of the structure formed by a minimum number of parts, while it is possible to adjust the assembly to the dimensions of the support due to the fact that during installation, tightening the tightening nuts allows the mounting unit to be mounted on supports of various sections, and the difference in size is compensated by the displacement of the curved metal rod in the holes of the tension beam, followed by yagivaniem tightening nuts.

The tension traverse with two holes for connecting to the ends of a curved metal rod rigidly connected to a stop in the form of a metal plate, in addition to the possibility of adjustment, provides, together with the metal rod, high strength characteristics and high structural rigidity, due to the fact that the metal rod is bent at an angle forms two sides of the triangle, which are closed by the third side - the traverse. The limbs of the plate parts in the form of triangles located perpendicular to the plate at an angle to each other, create a sufficient contact area and cause a tight fit of the stop to the reciprocal planes of the support on which the claimed node is mounted. A part of the metal rod bent in the middle and rigidly connected to the abutment so that the apex of the angle formed by the bending of the rod with a portion of the adjacent length of the rod extends beyond the abutment (on the side opposite the cut) and forms a loop, which is a means for attaching a bracket of type SK, SKD or other linear reinforcement, the force from which is transmitted directly to the stop and then to the support through the system of a metal rod - stop - tension beam. A similar effect is achieved due to the implementation of at least one hole in the traverse for mounting brackets such as SK, SKD or other linear reinforcement. The force in this case is perceived by the tension traverse - metal rod - stop system (bends of the metal plate parts in the form of triangles) and is transmitted to the support on which the claimed unit is mounted. In addition, if the support at the installation site of the assembly is reinforced by the profile, the tension beam can be equipped with elements (metal profiles) rigidly attached to the tension beam and designed to interact with the surface of the support profile (compensation of the distance from the plane of the tension beam to the contact plane of the support). Making a cut on a metal plate (emphasis) allows you to get the bends of the required area, determined from the point of view of the strength of the site. In addition, you can get the necessary angle between the limb planes, corresponding to the angle of, for example, a V-shaped support, or a metal support of another shape with a triangular or other similar cross-section, having two planes converging at any angle less than 180 °.

The execution of the ends of the metal rod with a thread for connection with the tensioning traverse allows to simplify the installation of the assembly on the support, since the achievement of the required pulling force of the tensioning traverse and the stop is provided by the tightening nuts, and, as noted above, the size of the support can vary - the distance between the emphasis and the tension traverse determined by the length of the metal rods from the stop to the holes in the traverse.

The design of the assembly is formed of ordinary parts, in particular, the tension beam can be made of a profiled corner, the elements welded to the tension beam and designed to interact with the surface of the support profile are made from channel sections.

The invention is illustrated by drawings, which depict:

In FIG. 1 is a general view of a tension unit for attaching an optical cable.

In FIG. 2 - the same, with means for attaching an optical cable.

In FIG. 3 is a plan view of a tension unit for attaching an optical cable.

In the drawings, the positions show: 1 - a metal rod bent at an angle close to the angle of the triangular section of the support; 2 - tension traverse with holes made in it for connecting to the ends of the metal rod and a hole (possibly reinforced) for mounting brackets of type SK, SKD or other linear reinforcement; 3 - a metal plate having bends in the middle part in the form of a triangle; 4 - bracket type SK, SKD; 5 - optical cable; 6 - lanyard; 7 - thimble; 8 - tightening nuts; 9 - sleeve; 10 - support; 11 - elements designed to interact with the support (sections of the channel); 12 - spiral tension clamp.

The attachment point of the optical cable for tensioning contains a stop connected by means of a metal rod 1 with a tensioning beam 2 made of a metal profile, mainly from a corner. Holes are formed in the tension traverse 2 to accommodate the ends of the metal rod 1. For ease of installation of the ends of the metal rod 1, the holes have an elongated shape. In addition, at least one hole is made in the tension traverse 2 for attaching a bracket of type SK, SKD or other linear reinforcement (see Fig. 2).

The emphasis is a metal plate 3, in which a cut is made along the axial line and triangular bends are made from the cut at an angle to each other, oriented so that the plane of the bends is perpendicular to the plane of the metal plate 3. The angle between the bends corresponds to (equal to) the angle between the planes of the support 10 V-shaped or triangular cross-section on which the claimed fastener assembly should be installed. The presence of bends and their dimensions make it possible to provide the required contact area between the emphasis and the support planes 10 of a V-shaped or triangular section, determined based on the estimated load on the node.

The metal rod 1, bent approximately in the middle at an angle close to or equal to the angle between the bends on the metal plate 3, is rigidly attached, mainly welded, to the metal plate 3.

The metal rod 1 is rigidly connected to the metal plate 3 so that the apex of the angle between the two rectilinear parts of the bent rod with the adjacent parts of the rod extends beyond the metal plate 3 with the formation of a loop for attaching a bracket type SK, SKD or other linear reinforcement (not shown in the drawings) . The loop is located on the outside of the metal plate 3, opposite the cut and bends.

The connection of the tension beam 2 with the metal rod 1 is preferably detachable in the form of a threaded connection. A thread is made at a given length of the end parts of the metal rod 1, and the connection with the tension beam 2 is made by installing the threaded ends of the rod 1 in the holes of the tension beam 2 with the subsequent tightening of the tightening nuts 8 through the sleeve 9. In this case, the rectilinear parts of the metal rod 1, located at an angle to each other, form two sides of the triangle, and the tension beam - the third side of the triangle.

In case the V-shaped support is supported at the site of the assembly, for example, by a corner, as shown in FIG. 1 and FIG. 2, to compensate for the distance from the tension beam 2 to the contact plane of the support 10, the tension beam 2 can be equipped with elements 11 designed to interact with the surface of the profile of the support for which the mount is intended. Elements 11 are made in the form of metal profiles, for example, in the form of sections of a channel, and are rigidly attached (welded) to the tension beam 2.

When installing the tension unit for attaching the optical cable to a support, for example a V-shaped section, the emphasis is pressed against the contact planes of the V-shaped section, as shown in FIG. 3, lead the threaded ends of the metal rod 1 into the holes of the tensioning beam 2, bring the elements 11 to the support 10 from the side opposite to the stop (metal plate 3), until the elements 11 come into contact with the support surface, and tighten the coupling nuts 8 through the sleeve 9 with necessary effort.

The high strength properties of the claimed attachment point, the simplicity and convenience of its installation are confirmed by the Protocol of mechanical tests No. 4623-13 of 11/18/2013, CJSC STC Elektroset, testing laboratory. During the tests, the force was applied both to the loop formed by the bending of the metal rod 1 and the plane of the metal plate 3, and to the hole intended for fastening the brackets of type SK, SKD or other linear reinforcement in the tension beam 2, in both cases the mechanical strength of the assembly corresponded to the established requirements .

Claims (8)

1. The attachment of the optical cable of the tension, containing the stop and a curved metal rod attached to the stop, characterized in that it is equipped with a tension traverse made with two holes for connecting with the ends of the curved metal rod, the stop is made in the form of a metal plate with a cut, from which is made of the bends of the parts of the metal plate, oriented perpendicular to the plate at an angle to each other, and the metal rod is bent in the middle to form an angle between the two parts of the rod rigidly connected to the metal plate so that the apex angle formed by bending a rod goes beyond it to form a loop, wherein the tensioning crossmember is formed at least one opening for fastening of the linear valves. 2. The node according to claim 1, characterized in that the bends of the parts of the metal plate (stop) have a triangular shape, and the angle between them is made corresponding to the shape of the support for which the mount is intended. 3. The node according to claim 1, characterized in that the metal rod is threaded along its end parts, passed into the holes of the tension beam, and connected to it by tightening the tightening nuts so that the rectilinear parts of the metal rod located at an angle form two sides of the triangle, and the tension beam - the third side of the triangle. 4. The node according to claim 1, characterized in that the loop extending beyond the metal plate and formed by the bend of the rod is located on the side of the plate opposite the limbs of the metal plate. 5. The node according to claim 1, characterized in that the tension beam is made of a metal profile, mainly a corner. 6. The node according to claim 1, characterized in that the tension beam is provided with elements for interacting with the support for which the mount is designed, the elements being formed by metal profiles rigidly attached to the tension beam. 7. The node according to claim 6, characterized in that the elements intended for interaction with the support are made in the form of channel sections. 8. The node according to claim 2, characterized in that the angle between the two parts of the bent rod is approximately equal to the angle between the triangular bends of the parts of the plate.

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