RU2431226C1 - Spiral supporting clamp - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: clamp includes boat 1 for wire (cable) 2, U-shaped tightening bolts 3, ram 5 and clip 6 for attachment of clamp to the line support. Clamp has spiral protector 7 up to 50 lengths long of boat. Boat 1 is made in the form of semi-circular chute with variable cross section with known bending radius. Ram 5 of clamp is T-shaped, installed on spiral protector 7 and has two cavities 8, 9 for bolts 3. In the middle part on side surfaces of boat 1 at equal distance from its edges 10, 11 there made are lugs 12, 13 with holes 14, 15 for attachment of clamp 6 of suspension from above and from below of boat 1 by means of nuts 16, 17. On side surfaces of boat there made are lugs 18 with holes 4 for attachment of U-shaped tightening bolts 3 pressing ram 5 to wire (cable) 2.

EFFECT: clamp allows preventing the wire damage at the boat outlet, which is determined with external actions, guarantees increase of service life and strength of termination of wire to specified values, reliable in operation and used in commercial production.

11 cl, 3 dwg

Description

The invention relates to the field of electric power and communications, in particular to spiral support clamps for hanging self-supporting optical communication cables and wires of overhead power lines.

Known support clip for the wires of overhead power lines, containing a boat with eyes and a groove for the wire, U-shaped tightening bolts, a die with a groove for the wire in its lower part and grooves for U-shaped tightening bolts [1].

This known supporting clamp has a significant disadvantage in that the service life of such clamps is 25 years, while the standard service life of an overhead power line is 40 years; at the same time, for the clamps of this design, there are damage to the wire at the exit of the boat from various effects caused by dancing the wires, aeolian vibration, aerodynamic trail in the split phase during sub-vibrations, etc.

The closest technical solution to the proposed one is a support clip for wires of overhead power lines and self-supporting optical communication cables, containing a boat for a wire or cable, tightening bolts installed in the boat and ensuring that the wire or cable is pressed to its gutter, and a suspension bracket for fixing the clip to the line support [2].

The specified technical solution (supporting clamp) does not allow to eliminate the disadvantages associated with the presence of damage to the wire or cable at the exit of the clamp boat and, as a result, with a reduction in service life to 25 years or less, not corresponding to the service life of overhead power lines or communication lines .

The applicant set himself the task of developing and industrializing the practice of electric grid construction of new spiral support clamps for hanging wires of overhead power lines and self-supporting optical communication cables, which would be characterized by high performance characteristics in terms of the strength of the wire or cable termination in the clamp, the absence of damage to the wire or cable at the exit of the clamping boat, as well as a significant increase in the service life, commensurate with the service life of the line itself th on which the supporting clamps are mounted. This positive technical result was achieved due to a new set of essential design features set forth in the following claims: “spiral support clamp for wires of overhead power lines and self-supporting optical communication cables, containing a boat for a wire or cable, tightening bolts installed in the boat and providing pressing the wire or cable to its gutter, and the suspension to secure the clip to the line support; it is equipped with a protector consisting of a set of wire spirals, wound onto a wire or cable so that the ends of the tread extend on both sides of the boat from its ends, with a die mounted on the outer surface of the tread and ensuring that the wire or cable with the protector is pressed against the gutter by tightening bolts boats, the ends at the ends of which are made on a length L ₁ = (0.02 ÷ 0.49) L in the form of a bell, designed to prevent damage to the wire or cable during oscillations, where L is the length of the clamp, while in the middle part on the side surfaces of the boat at equal distance from its ends, tides were made for mounting the suspension above and below the boat, and at a distance L ₂ determined from the length of the boat, measured from its center to the ends, additional tides were made on the side surfaces of the boat for mounting the dies to a wire or cable of said tightening bolts; the boat is made in the form of a semicircular groove with a variable cross-section along its length with a radius of R ₁ bending the groove in the middle of the boat relative to the vertical plane, equal to R ₁ = (15 ÷ 250) d _pr.max , where d _pr.max is the maximum diameter of the mounted wire or cable; the average value of the bending radius of the semicircular boat gutter is determined within (0.52 ÷ 1.2) of the outer diameter of the spiral tread in a state wound on a wire or cable; each bell at the ends of the boat is made along a radius R ₂ equal to R ₂ = (0.5 ÷ 20) d _pr.max ; said tightening bolts are U-shaped; the die is made in the form of an inverted T-shaped figure with at least two recesses under the U-shaped tightening bolts; the suspension is made in the form of a bracket fixed on top and bottom of the boat by means of nuts; tides in the middle part on the side surfaces of the boat, designed for mounting the suspension, made with holes; additional tides for attaching the clamping dies to the wire or cable of said tightening bolts are provided with holes, and the distance L ₂ at which additional tides with holes are located is chosen equal to (0.25 ÷ 0.3) from the length of the boat, measured from its center to the ends ; the length of the spiral tread is selected based on the condition of up to 50 boat lengths; the installation of a spiral tread along the length of the clamping boat provides an increase in the termination strength of a wire or cable by at least 10% relative to the standard nominal value of the termination strength. "

The invention is illustrated by drawings, where figure 1 shows a General view of a support clip made according to the present invention, a view perpendicular to the wire or cable lines; figure 2 is a section along aa in figure 1; figure 3 is a section along bb in figure 1.

The proposed supporting clip for overhead power lines and self-supporting optical communication cables includes a boat 1 for wire 2 or cable 2, U-shaped tightening bolts 3 that are fixed in the holes 4 of the boat 1, a die 5 and a suspension in the form of a bracket 6 for fixing the clip to line support (not shown). The clamping boat 1 is made of metal, in particular made of aluminum or an aluminum alloy. The clamp design includes a spiral protector 7, consisting of a set of wire spirals, wound along the entire length of the boat 1 onto the wire 2 or cable 2. The length of the spiral protector 7 is selected based on the condition of up to 50 boat lengths so that the ends of the tread 7 extend on both sides of the boat 1 from its ends. Boat 1 is made in the form of a semicircular trough with a variable cross-section along its length with a radius R _{1 of the} bend of the trough in the middle of the boat relative to the vertical plane, equal to R ₁ = (15 ÷ 250) d _pr.max , where d _pr.max is the maximum diameter mounted wire or cable, and a bell at the ends of boat 1 with a bend radius R ₂ at a length L ₁ = (0.02 ÷ 0.49) L, where L is the clamp length equal to R ₂ = (0.5 ÷ 20) d _pr.max . The average value of the bending radius of the semicircular trough of boat 1 can also be determined and selected within (0.52 ÷ 1.2) of the outer diameter of the spiral tread 7 in a state wound on wire 2 or cable 2. The die 5 of the clamp is a part made in the form of an inverted T-shaped figure; it is mounted on the outer surface of the spiral tread 7 and has two recesses 8, 9 under the U-shaped tightening bolts 3. In the middle part on the side surfaces of the boat 1 at an equal distance from its ends 10, 11 there are tides 12, 13 with holes 14, 15 for fastening the suspension bracket 6 above and below the boat 1 using nuts 16, 17. At a distance L ₂ = (0.25 ÷ 0.3) from the boat length, measured from its center to the ends 10, 11 of boat 1, on it tides 18 with holes 4 are made on the lateral surfaces for fastening the clamping dies 5 to the wire 2 or cable 2 U-about different tightening bolts 3.

An increase in the termination strength of wire 2 or cable 2 in the clamp with the tread relative to the standard nominal value of the termination strength is provided by no less than 10%.

The clamp is mounted on an overhead power line or communication line as follows:

First, a spiral tread 7 is specially wound on a wire (cable) 2, specially selected according to the number of wire spirals in it, the diameter and pitch corresponding to the diameter of the wire (cable) 2. Then the wire (cable) 2 with the spiral tread 7 wound 7 is put into boat 1, it is installed the die 5, U-shaped tightening bolts 3 are inserted into the holes 4 of the tides 18, the bracket 6 of the suspension is inserted into the holes 14, 15 of the tides 12, 13, fixed on the top and bottom of the boat 1 with nuts 16, 17 and in this assembled form the clamp is suspended by the bracket 6 to the power pole or communication lines.

The inventive support clip for the wires of overhead power lines and self-supporting optical communication cables allows you to virtually eliminate damage to the wire (cable) at the exit of the boat, due to the effects of various types of acting on the oscillation lines, provides an increase in service life to values commensurate with the service life of the lines themselves, guarantees reliable operation for the entire period of operation, allows to increase the strength of the wire (cable) termination by at least 10% relative to the nominal normative termination strength. Currently, the clamp is being introduced into industrial production and operation on power lines and communication lines.

Information sources

[1] Copyright certificate of the USSR No. 1677758, cl. H02G 7/05 of 08/18/1988, publ. September 15, 1991 Bull. Number 34.

[2] Description of the invention to patent No. 2303846 "Support clamp for wires of an overhead power line", cl. H02G 7/05 of November 30, 2005, publ. July 27, 2007 Byul. No. 21.

Claims (11)

1. A spiral support clamp for wires of overhead power lines and self-supporting optical communication cables, comprising a boat for a wire or cable, tightening bolts installed in the boat and ensuring that the wire or cable is pressed to its gutter, and a suspension for securing the clip to the line support, characterized in that it is equipped with a protector consisting of a set of wire spirals, wound on a wire or cable so that the ends of the tread extend on both sides of the boat from its ends, with a die mounted on uzhnuyu tread surface and providing a pressing means of lock bolts wire or cable with a chute protector pumps, the ends on the ends of which are made over a length L ₁ = (0,02 ÷ 0,49) L-shaped socket intended to avoid damaging the wire or cable when vibrations, where L - length of the clip, while in the middle part of the side surfaces of boats at equal distances from its ends formed tides for fastening the suspension above and below the boat, and at a distance L ₂ defined by the length of the boat, as measured from its center ends, on the sides of the boat are made for flushing additional fastening the pressing plate to the wire or cable, said tightening bolts. 2. The clamp according to claim 1, characterized in that the boat is made in the form of a semicircular groove with a variable cross section along its length with a radius R _{1 of the} bend of the groove in the middle of the boat relative to the vertical plane, equal to R ₁ = (15 ÷ 250) d _{pr .Max.} where d _{pr max.} - maximum diameter of mounted wire or cable. 3. The clamp according to claim 2, characterized in that the average value of the bending radius of the semicircular boat gutter is determined within (0.52 ÷ 1.2) of the outer diameter of the spiral tread in a state wound on a wire or cable. 4. The clamp according to claim 1, characterized in that each bell at the ends of the boat is made along a radius R ₂ equal to R ₂ = (0.5 ÷ 20) d _pr.max. . 5. The clamp according to claim 1, characterized in that the said tightening bolts are made in a U-shape. 6. The clamp according to claim 1 or 5, characterized in that the die is made in the form of an inverted T-shaped figure with at least two recesses under the U-shaped tightening bolts. 7. The clip according to claim 1, characterized in that the suspension is made in the form of a bracket fixed on top and bottom of the boat by means of nuts. 8. The clamp according to claim 1, characterized in that the tides in the middle part on the side surfaces of the boat, designed for mounting the suspension, are made with holes. 9. The clamp according to claim 1, characterized in that the additional tides for attaching the die pressing to the wire or cable of said tightening bolts are provided with holes, and the distance L ₂ at which the additional tides with holes are located is chosen equal to (0.25 ÷ 0, 3) from the length of the boat, measured from its center to the ends. 10. The clamp according to claim 1, characterized in that the length of the spiral tread is selected based on the condition of up to 50 boat lengths. 11. The clamp according to claim 1, characterized in that the installation of a spiral tread along the length of the clamping boat provides an increase in the termination strength of the wire or cable by at least 10% relative to the standard nominal value of the termination strength.

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