RU2055433C1 - Spiral-type supporting clamp for fiber-optic cables of communication lines or conductors of overhead power transmission lines - Google Patents

Abstract

FIELD: electric power engineering. SUBSTANCE: clamp has hairpin coil, hanger, and cable or conductor locking mechanism. Spiral protector and rubber half-sleeves are tightly fitted around cable or conductor. Half-sleeves provided with safety metal spacer have cylindrical part and tapered ends. Angle of inclination of tapered ends equals half the protector spiral angle. EFFECT: improved vibration stability of line. 2 dwg

Description

 The invention relates to electrical and communication technology; it can be used for attaching fiber optic cables of communication lines or wires of overhead power lines.

Known clip for fastening the wires of an overhead power line, consisting of a suspension, a boat made with ledges, and a wire clamping mechanism in the form of dies [1]
The specified clamp is quite difficult to install and does not provide an even distribution of the clamping forces of the wire.

 In addition, this clip does not have a streamlined shape due to the presence of bolts, fingers and cotter pins in the pendants, which leads to significant losses of electrical energy for magnetization reversal, losses in the line to the crown, and an increase in the level of radio noise.

The closest technical solution to the invention is a support clamp of a spiral type for attaching fiber optic cables of communication lines or wires of overhead power lines, comprising a boat, a suspension bracket mounted on the side surfaces of the boat, and a cable or wire fixing mechanism made in the form of levers based on pressure plate, spiral tread and rubber half-sleeves, each of which has a protective metal gasket and covers a cable or wire [2]
This clamp has the following disadvantages:
non-standard clamping boat, requires additional structural casting;
does not provide the normative specified strength of the cable (wire) termination in the clamp;
the inability to smoothly control the cable / wire termination strength in the clamp over a wide range;
when pulling (some emergency conditions), the cable (wire) may be damaged in the clamp boat.

 The authors set themselves the goal of developing a design of a supporting clamp of a spiral type, free from the indicated drawbacks of clamps of known designs.

 This goal is achieved by the fact that in the supporting clamp of a spiral type for attaching fiber optic cables of communication lines or wires of overhead power lines, containing a boat, a suspension bracket mounted on the side surfaces of the boat, and a cable or wire fixing mechanism made in the form of levers based on pressure plate, spiral tread and rubber half-sleeves, each of which has a protective metal gasket and covers a cable or wire, rubber half-sleeves are made in the form cylinders with tapering ends on the conical surface, a safety metal strip is located on the outer surface of each rubber half-sleeve, while the angle of the cone at the ends of the rubber half-sleeves is half the tread angle of the tread spiral, the length of the cylindrical part of the rubber half-sleeves is 5-10% longer than the length of the boat, and the length of each cone at the ends of the rubber half-sleeves is chosen equal to half the length of the conical part of the tread.

 In FIG. 1 depicts a spiral-type support clamp made in accordance with the invention, a front view, across a cable or line wire; in FIG. 2 section aa in figure 1.

 A support clamp of a spiral type for attaching fiber optic cables 1 of communication lines or wires of overhead power lines contains a boat 2, a suspension 3, which is fixed on the side surfaces of the boat 2, and a mechanism for fixing the cable 1 or wire 1. The mechanism for fixing the cable 1 or wire 1 is performed in the form of levers 4, supported by a clamping die 5. The clamp also includes a spiral tread 6 and rubber half-sleeves 7, which have a safety metal gasket 8, pressed into, for example, each of them. Half-sleeves 7 tightly enclose cable 1 or wire 1.

 Rubber half-sleeves 7 are made in the form of cylinders with ends tapering along the conical surface 9. A safety metal strip 8 is located on the outer surface 10 of each rubber half-sleeve 7.

 The tilt angle of the cone at the ends 9 of the rubber half-bush 7 is equal to half the angle of approach (α) of the tread spiral. The length of the cylindrical part 11 of the rubber half-shells 7 is equal to or 5-10% greater than the length of the boat 2. At the same time, the length of each cone at the ends 9 of the rubber half-shells 7 is chosen equal to half the length of the conical part 12 of the tread 6.

The clamp works as follows
First, rubber half-sleeves 7 are put on cable 1 or wire 1, after which spiral protectors 6 are put on cable 1 or wire 1 with half-sleeves 7 put on. In this form, the assembled package is placed on the bottom of boat 2, from above it is fixed by a pressure die 5 and levers 4 of the mechanism fixing cable 1 or wire 1, and the suspension 3 is fixed on the side surfaces of the boat 2. As a result, the support clamp is ready to be installed on a communication line or overhead power line.

The proposed support clamp spiral type has a number of significant advantages compared with the prototype:
fits into a standard boat, does not require additional structural casting;
provides the standard specified strength of the cable (wire) termination in the clamp;
pulling occurs entirely of the clamp without damaging the cable (wire);
it is possible to smoothly adjust the clamping strength of the cable (wire) in the clamp over a wide range;
the working conditions of the cable or wire within the boat are equivalent to the working conditions of the wire in a supporting clamp for a similar purpose;
provides high vibration resistance due to a smooth change in stiffness within and outside the boat.

Claims (1)

 SUPPORTING CLIP OF A SPIRAL TYPE FOR ATTACHING FIBER-OPTICAL CABLES OF LINES OR AIR-LINES OF ELECTRIC TRANSMISSIONS, containing a boat, a suspension bracket fixed on the side surfaces of the boat, and a cable clamp, a cable tie and a cable fastener half-sleeves, each of which has a protective metal gasket and covers a cable or wire, characterized in that the rubber half-sleeves are made in the form of cylinders with narrowing with the ends on the conical surface, a safety metal strip is located on the outer surface of each rubber half-sleeve, while the angle of the cone at the ends of the rubber half-shells is half the tread angle, the length of the cylindrical part of the rubber half-shells is 5 - 10% longer than the boat, and the length each cone at the ends of the rubber half-sleeves is made equal to half the length of the conical part of the tread.

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