RU2372698C1 - Wiring connector for steel ropes and steel wires - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: connector is made in the form of channel-shaped plate (2) with deflected edges (3, 4) along radius R=(0.52÷0.60)·d_K.min or R1=(0.4÷0.48)·d_k.min by deflection angle of α=60°÷90°, where d_K.min is minimum diametre of rope (1) mounted in connector, body (5), bolt (6) with washer (7) and fixator (8) at the end. Height of deflected edges (3, 4) of plate (2) is defined using maximum and minimum diametres of rope (1), namely: h=(1.0÷1.2)·d_K.max and h₁=(0.8÷0.9)·d_K.min, where d_K.max is a maximum diametre of rope (1) mounted in connector. On internal deflected surface (10) of deflected edges (3, 4) in plate (2), there are triangular notches arranged with an identical pitch and height of (0.4÷0.95) mm. Body (5) is made of rectangular sheet and has threaded hole (11) for bolt (6). Sheet is taken with thickness of S₁=(1.1÷1.3)·S, where S is thickness of sheet used to make plate (2), and width (1) calculated based on the following ratio: l=A+(0.95+1.02)d_K.min, where A is distance between centres of radiuses R, along which plate (2) edges (3, 4) are bent. Fixator made with punching provides for integrity of connector, since in process of connector mounting it prevents complete exit of bolt (6) from body (5).

EFFECT: reduced labour intensity in its manufacturing, design simplicity and convenience in mounting.

5 cl, 2 dwg

Description

The invention relates to the field of electric power, in particular to connecting die clamps of the PS type for steel ropes and steel wires (hereinafter referred to as ropes) used as lightning protection cables when grounding overhead power transmission lines.

Known is a connecting die clamp for connecting steel ropes, overhead power lines, comprising a body made of a shaped profile with grooves for laying connected ropes in them, at least one profile cross section die with grooves identical in geometrical dimensions to the body grooves, and constricting device fastening the casing and the dies with the line ropes laid in their gutters [1].

This clamp cannot provide the radial contact surface of the contact of the rope with the housing for the range of ropes being mounted in operation while ensuring optimal sealing strength of all mounted ropes.

The closest technical solution in relation to the proposed one is a connecting clamp for steel ropes and steel wires used as lightning protection cables when grounding overhead power lines, comprising a housing in the form of a rectangular plate located perpendicular to the longitudinal axis of the rope, at least one die with grooves of a given rounding radius, pulled together by means of a bolt [2].

The disadvantages of this clamp is the high complexity in the manufacture, since it requires powerful press equipment for forming ribs and grooves in the clamp, and significant metal consumption.

The applicant has set himself the task of eliminating the above-mentioned disadvantages of this known connecting clamp for ropes. The task and a positive technical result - reducing the complexity of manufacturing and metal consumption - were achieved due to a new set of distinctive design features, which are given in the following claims: "connecting clamp for steel ropes and steel wires used as lightning protection cables when performing grounding of air power lines containing a body in the form of a rectangular plate located perpendicular to the longitudinal axis of the rope, at least Leray, one plate with a predetermined radius fillet grooves subtended by a bolt; the die is made of a trough-like shape with edges bent along the radius R, slightly larger than half the minimum diameter of the rope mounted in the clamp, and component R = (0.52 ÷ 0.60) · d _K.min , where d _K..min is the minimum diameter of the mounted in the rope clamp, the height h of the bent edges of the die for a rope with a maximum diameter is determined from the relation h = (1.05 ÷ 1.2) · d _to.max , where d _to.max is the maximum diameter of the rope mounted in the clamp, bending angle α relative to the horizontal plane of the bent edges of the die is selected no more than 90 °, the body is made of sheet p a rectangular shape with a threaded hole for a bolt with a thickness S ₁ equal to (1.1 ÷ 1.3) · S, where S is the thickness of the sheet from which the die is made, and a width l calculated from the following ratio: l = A + (0 , 95 + 1,02) · d _к.min , where A is the distance between the centers of the radii R, along which the edges of the die are bent, while the said bolt has a latch at the end to prevent it from completely withdrawing from the housing and is selected such a length that by unscrewing the bolt from the housing to the level of the location of the clamp, it was possible to install as much as possible in the rope clamp of diameter, wherein the inner surface of the bent edges die perpendicular to its contact with the rope surfaces are triangular shaped notches, intended to enhance the strength of the rope termination of magnitude; the edges of the plate are bent along the radius R ₁ = (0.4 ÷ 0.48) · d _K.min at an angle α = 60 ° ÷ 90 °; the height h _{1 of the} bent edges of the die for a rope with a minimum diameter is determined from the relation h ₁ = (0.8 ÷ 0.9) · d _k.min , where d _k.min is the minimum diameter of the rope mounted in the clamp; the above notches are performed with the same pitch height equal to (0.4 ÷ 0.95) mm; the retainer at the end of the bolt is made by core. ”

The invention is illustrated by drawings, where figure 1 shows a General view of the proposed connecting clamp for ropes made according to the present invention, a view along the connected ropes; figure 2 presents a detailed section of the bent edge (minimum height) of the die clamp in figure 1.

The proposed connecting clip for ropes 1 consists of a trough-shaped die 2 with curved edges 3, 4, housing 5 and bolt 6 with a washer 7 and a latch (limiter of movement) 8 at the end. The edges 3, 4 of the die 2 are bent along the radius R, slightly larger than half the minimum diameter of the rope 1 mounted in the clamp, which is determined by the ratio: R = (0.52 ÷ 0.60) · d _to.min , or, as an option, R ₁ = (0.4 ÷ 0.48) · d _c.min , where d _c.min is the minimum diameter of the cable mounted in the clamp 1. The height h of the bent edges 3, 4 of the die 2 for the cable 1 with the maximum diameter is calculated from the equation h = (1,05 ÷ 1,2) · d _k.max where _k.max d - maximum diameter mounted in the clamp of the rope 1, and the height h ₁ of the beveled edges 3, 4 of the rope 2 for die 1 with a minimum diameter calculated from cheers neniya h ₁ = (0,8 ÷ 0,9) · d _k.min. Determining the height of the bent edges 3, 4 of the die 2, taking into account the diameter range of the ropes 1 from maximum to minimum, allows us to develop a clamp design in which the bent edges 3, 4 of the die 2 overlap the housing 5 by several millimeters (see figure 1), which makes it possible significantly facilitate the installation of the clamp (the edges 3, 4 of the die 2 fix the housing 5 during installation) and provide additional clamping strength, since the die 2 in this case eliminates the turn of the housing 5 when tightening the bolt 6.

The bending angle α relative to the horizontal plane 9 of the bent edges 3, 4 of the die 2 is in the range α = 60 ÷ 90 °, but practically its value is 90 °. On the inner surface of the bent part 10 of the bent edges 3, 4 of the die 2 perpendicular to the contact surface of the rope 1 are made with an even pitch and height (0.4 ÷ 0.95) mm of a triangular shape, which allows to increase the value of the termination strength of the rope 1.

The housing 5 is made of a rectangular sheet with a threaded hole 11 for a bolt 6 with a thickness S ₁ = (1.1 ÷ 1.3) · S, where S is the thickness of the sheet from which the die 2 is made, and with a width l = A + (0, 95 + 1,02) · d _к.min , where A is the distance between the centers of the radii R, (R ₁ ), along which the edges 3, 4 of the die 2 are folded. The latch 8, made at the end of the bolt 6, for example, by core, allows the complete withdrawal of bolt 6 from the housing 5 when mounting the clamp, while the bolt 6 is made so long that when it is unscrewed to the latch 8, it is possible to install a maximum diameter meter.

The invention works as follows.

The clamp comes to the assembly in the assembled state and it is preliminarily prepared for installation by unscrewing the bolt 6 from the threaded hole 11 of the housing 5 against the stop in the latch 8 located at the end of the bolt 6. The connected ends of the ropes 1 are successively inserted into the cavity between the housing 5 and the die 2 towards each other in such a way that ends of a length of approximately (8 ÷ 10) mm come out of the clamp. After this, the bolt 6 is screwed on by hand and then the final tightening is already done with a fixed torque wrench.

The inventive connecting clamp for steel ropes and steel wires when performing grounding of lightning protection cables of overhead power lines has significant advantages over the known clamps of a similar purpose in terms of low laboriousness in manufacturing (it is not necessary to use high-performance pressing equipment), saving material costs (due to the simplicity of the design performance), convenience and ease of installation (the clip is not separable, which eliminates the loss of its parts during installation).

Information sources

1. Finnish patent No. 52641, class H01R 7/24 of 05/05/1975, published 02/09/1978

2. Description of the invention to the patent of the Russian Federation No. 2024140, class H02G 7/05 of July 28, 1992, published November 30, 1994, Bulletin No. 22.

Claims (5)

1. A connecting clamp for steel ropes and steel wires used as lightning protection ropes when grounding overhead power lines, comprising a body in the form of a rectangular plate located perpendicular to the longitudinal axis of the rope, at least one die with grooves of a given radius of radius, pulled together by a bolt, characterized in that the die is made of a trough-shaped with edges bent along the radius R, slightly larger than half the minimum diameter of the clamp e of the rope and component R = (0.52 ÷ 0.60) · d _c.min , where d _c.min is the minimum diameter of the cable mounted in the clamp, the height h of the bent edges of the die for the cable with the maximum diameter is determined from the relation h = ( 1,0 ÷ 1,2) · d _к.max , where d _к.max is the maximum diameter of the rope mounted in the clamp, the bending angle α relative to the horizontal plane of the bent edges of the die is selected no more than 90 °, the body is made of a rectangular sheet with a threaded a bolt hole with a thickness S ₁ equal to (1.1 ÷ 1.3) · S, where S is the thickness of the sheet from which the die is made, and a width l, ra read from the following relation: l = A + (0.95 + 1.02) · d _k.min , where A is the distance between the centers of the radii R along which the edges of the die are bent, while the said bolt has a latch at the end to prevent it complete withdrawal from the housing and it is chosen such a length that when unscrewing the bolt from the housing to the level of the clamp location, it is possible to install a maximum diameter in the rope clamp, and triangular-shaped notches are made on the inner surface of the bent edges of the die perpendicular to the contact surface of the rope the first form, designed to increase the strength of the termination of the rope. 2. The clamp according to claim 1, characterized in that the edges of the plate are folded along the radius R ₁ = (0.4 ÷ 0.48) · d _K.min at an angle α = 60 ° -90 °. 3. The clamp according to claim 1, characterized in that the height h _{1 of the} bent edges of the die for a rope with a minimum diameter is determined from the relation h ₁ = (0.8 ÷ 0.9) · d _k.min , where d _k.min - minimum diameter of the rope mounted in the clamp. 4. The clamp according to claim 1, characterized in that the above notches are performed with the same pitch with a height of 0.4 ÷ 0.95 mm 5. The clamp according to claim 1, characterized in that the latch at the end of the bolt is made by punching.

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