RU2730240C1 - Electric cable armor wires fixing lock - Google Patents

Abstract

FIELD: technological processes.

SUBSTANCE: wire cable armor fixation lock relates to electrical engineering and can be used for connection of ends of both multicore and single-core power cable with wire armor. Cable armor wires fixing lock contains a bushing and pressure flanges, in which holes are made, and fixing bolts with nuts, the bushing is made in the form of two large cones base facing each other, central holes of pressure flanges are conical, taper of central holes of pressure flanges corresponds to conicity of conical bushing.

EFFECT: cable armoring wires fixing lock has simple design and can be used for cables with armor in form of braiding from metal wires and from polymer materials or carbon fiber reinforced plastic.

4 cl, 7 dwg

Description

The invention relates to the field of electrical engineering, in particular to electrical cable connections, and can be used to connect (attach) the ends of both multi-core and single-core power cable with wire armor.

Known is a lock for fastening an electrical cable containing a hollow tubular element, in which at least part of the cable is guided by a groove groove along a curved path to obtain tension relief of the end connection of a tubular electrical cable. (RF Patent No. 2 625 916, MKL HO2G 15/007, publ. . 19.07.2017).

The disadvantages of this technical solution are the considerable length of the lock and insufficient reliability of the cable fixation.

The closest to the proposed technical solution is the lock for fastening the wires of the cable armor, made in the form of a sleeve, containing sealing cuffs, pins, thrust, support, diamagnetic, power and clamping flanges, fastening bolts with nuts, the sleeve is made of dielectric and is equipped with cylindrical thickenings on the outer surface , longitudinal holes are made in the bushing and in its cylindrical thickenings, on the ends of the bushing there are support and clamping flanges on one side, on the other side there are thrust flanges through which fastening bolts are passed; of which the power flanges are installed, through the cylindrical thickenings on the outer surface of the sleeves, through the diamagnetic flanges and longitudinal holes in the cylindrical thickenings, fastening bolts with nuts are passed. (Application for invention No. 2019134247/20 (067563) dated 10/25/19 by the same applicant).

The disadvantages of this technical solution are the structural complexity and limited scope due to the need to bend the ends of the wires of the cable armor at an angle of 90 °, not all armor can be bent 90 °. For example, armor in the form of a braid made of metal wires is simply inconvenient to bend during installation, and armor made of polymer materials or carbon fiber breaks at such bending angles.

The technical problem to be solved by this proposal is to simplify the design and reduce the dependence on the material of the wire armor, i.e. expanding the possibilities of using the lock.

To solve this technical problem, a lock for fastening the wires of the cable armor is proposed, containing a bushing and clamping flanges in which holes are made, and fastening bolts with nuts, the bushing is made in the form of two cones facing each other with large bases, the central holes of the clamping flanges are made conical, taper the center holes of the pressure flanges match the taper of the taper bushing. The bases of the bushing tapers can be adjacent to each other directly or through the cylinder. Stop angles can be attached to the pressure flanges.

The proposed lock for fastening the wires of the armor of an electrical cable can be manufactured using existing equipment from known materials. The applicant did not find other technical solutions of a similar purpose with similar essential features during a search in scientific and technical literature and patent documentation. The proposed solution does not follow clearly from the prior art. Therefore, the applicant considers that the proposal for this application meets the criteria of patentability of the invention "novelty", "inventive step" and "industrial applicability".

The essence of the proposal is illustrated by drawings, which show a non-exclusive example of a lock for fastening the wires of the cable armor. using a tapered sleeve, the bases of the cones of which are adjacent to each other through the cylinder. Installation of the lock using a tapered sleeve, the bases of the cones of which are directly adjacent to each other, is similar. The choice of the sleeve design is determined by the size of the cable and the allowable dimensions of the lock.

FIG. 1 shows the device mounted on a cable, FIG. 2 - conical sleeve, side view, in Fig. 3 - tapered bushing, front view, in Fig. 4 - clamping flange, front view, in Fig. 5 is a cross-section of the clamping flange, Fig. 6 is a cross-section of a stop angle, Fig. 7 - fully wired device.

The figures indicate: cone bushing 1, clamping flanges 2 and 3, tightening bolts 4 with nuts 5, cones 6 and 7 of bushing 1, cylinder 8 of bushing 1, stop corners 9, PVC tape 10, outer sheath 11 of the cable, armor 12 of the cable, heat shrink tubing 13.

The proposed lock for fastening the wire armor of an electrical cable is used as follows:

Remove the outer sheath 11 of the cable from the installation site of the lock, wind up 4-5 turns of PVC tapes 10 at the cut of the outer sheath 11 of the cable and in the middle of the lengths of the cones 6 and 7 of the sleeve 1 (1-2 turns). The heat-shrinkable tube 13 and the clamping flange 2 are pushed onto the cable. Shift the cable armor 12 towards the cut of the outer sheath 11 of the cable so that it increases in diameter, push the sleeve 1 along the cable under the armor 12 until it stops, pull (straighten) as much as possible the armor 12 along the sleeve 1, pressing it into the previously wound on the sleeve 1- 2 turns of PVC tape 10, fix the end of the armor 12 on the sleeve 1 with PVC tape 10, push the clamping flanges 2 and 3 onto the tapered sleeve 1 from both sides, orienting them mirror-like to each other so that the taper of the holes of the clamping flanges 2 and 3 corresponds to the tapered taper bushings 1, pull the flanges 2 and 3 together with tightening bolts 4 with nuts 5, attach two stop corners 9 with bolts 4 with nuts 5, as shown in Fig. 7. Thrust corners 9 allow you to fix the armor lock on the supporting anchor platform through the holes in the corners 9. Shift the heat-shrinkable tube 13 against the stop against the lock and shrink with a burner flame towards the lock (Fig. 7)

The applicant has manufactured and successfully tested prototypes of the proposed lock for fastening the wires of the cable armor on cable products of various designs and standard sizes.

Claims (4)

1. The lock for fastening the wires of the cable armor, containing a sleeve and clamping flanges in which holes are made, and fastening bolts with nuts, characterized in that the bushing is made in the form of two cones facing each other with large bases, the inner holes of the clamping flanges are tapered, the taper of the central the holes of which correspond to the taper of the tapered sleeve. 2. The lock for fastening the wires of the cable armor according to claim 1, characterized in that the bases of the bushing cones adjoin each other directly. 3. The lock for fastening the wires of the cable armor according to claim 1, characterized in that the bases of the bushing cones are adjacent to each other through the cylinder. 4. The lock for fastening the wires of the cable armor according to claim 1, characterized in that stop corners are introduced into it.

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