CZ296091B6 - Load-bearing bracket of bare conductors for high-voltage overhead system - Google Patents

Abstract

The present invention relates to a lad-bearing bracket of bare conductors for high-voltage overhead system consisting of side insulators (15, 15?) and provided with a bracket (1) having the form of open V letter V and a top insulator (28) and provided with a top bracket (2) for independent attachment to the shaft (3) of the column.

Description

(57)

The support bracket is formed by side insulators (15, 15j) provided with a two-arm V-shaped bracket (1) and a top insulator (28) provided with a top bracket (2) for separate connection to the pole shaft (3).

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Bare conductor support bracket for outdoor high-voltage power lines

Technical field

BACKGROUND OF THE INVENTION The present invention relates to a bare conductor support bracket for outdoor high voltage power lines.

BACKGROUND OF THE INVENTION

Plain support brackets with insulators arranged in one horizontal plane and fixed to the planar support bracket in a vertical position are used for high voltage distribution through bare conductors. The distance of individual conductors is prescribed by ČSN and therefore the horizontal distance of insulated conductors in horizontal arrangement must be at least 1500 mm. This means that theoretically the minimum width of the bracket must be at least 3000 mm. The insulator is used only as an insulating element which does not contribute to reducing the electrical insulation distances between the conductors. Furthermore, there are known support brackets consisting of a vertical arm terminated at the upper end with an insulator and at the lower end opposed, for example welded, with two lateral support arms terminated with vertically oriented insulators. The lateral support arms are arranged on the vertical arm either perpendicular or obliquely upwards. The lower end of the vertical arm is adapted to be attached to the column shaft as well as the central portion of the planar support bracket.

A disadvantage of these types of support brackets is the considerable weight that causes physically strenuous mounting to the top of the column shaft by means of mechanization means. This high weight is due both to the integral structure of the support bracket supporting all three insulators and to the vertical orientation of the insulators, which requires a large length of the planar support bracket and a large length of lateral support arms to provide the necessary phase spacing between the conductors.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION It is an object of the present invention to overcome these disadvantages and to provide a support bracket that is smaller in size and thus significantly lighter in weight, and would also make it possible to reduce both the width of the guide and the width of its corridor.

This object is achieved and the drawbacks are eliminated by the bare conductor support bracket for high-voltage outdoor power lines according to the invention, which consists of side insulators provided with a two-arm open V-shaped bracket and a top insulator provided with a top bracket for separate connection to the pole shaft .

According to the invention, it is preferred that the double-arm bracket is formed by a pair of opposed and interconnected arms tapering towards its free ends, wherein the double-arm bracket is formed by a pair of identical assemblies, of which the first assembly comprises opposite and superposed two pairs of angle profiles. which are terminated at one free end by a fixed oval bore plate and at the other at the free end by a fixed circular bore plate, while the other assembly comprises two opposing and superimposed two pairs of angular profiles which terminate at one free end cover plate with a circular hole and on the other free end terminated by a fixed washer plate with an oval hole for connection with a circular hole with fastening screws of side insulators oriented in the direction of extension by each arm of the two-arm console.

Furthermore, it is advantageous if the apex bracket is formed by a pair of identical U-profiles bent at right angles to the closing arms provided with a one-sided shoulder for snapping together

The locking arms are provided with elongate holes for the top insulator mounting bolt.

Advantage of the solution according to the invention is, on the one hand, the division of the supporting bracket into two parts, i.e., the two-arm bracket and the top bracket, allowing separate mounting of the individual parts on the column shaft. . This has also caused insulators to also be used to reduce the electrical insulation distances between conductors. The shortening of the length of the arms together with their entire concept, i.e. the arrangement and optimal dimensioning of their angular profiles, has further reduced their weight and thus further facilitates the assembly of the support bracket with limited mechanization means.

Overview of the drawings

An exemplary embodiment of the invention is shown in the drawings, wherein Fig. 1 is a front view of a support bracket mounted on a column shaft and formed of a two-arm bracket and a top bracket; Fig. 2 is a side view of the support bracket of Fig. 1 without insulators; 1 is an enlarged view of the end arm of the double arm bracket of FIG. 1 in a direction away from the side insulator, FIG. 4 is a partial view in the direction of arrow P of the end portion of the arm of the double arm bracket also enlarged; FIG. 6 is a plan view of the top bracket of FIG. 5, FIG. 7 is a front view of the assembled top bracket of FIG. 5, and FIG. 8 is a plan view of the top bracket of FIG.

DETAILED DESCRIPTION OF THE INVENTION

The support bracket for the external high-voltage power lines consists of two parts, one part being a two-arm bracket 1 and the other part being a top bracket 2. Both parts are designed for separate connection to the pole 3 of the column. The two-arm bracket 11 is formed by a pair of oppositely arranged arms 4, 5 oriented obliquely upwards in the shape of an open V. Each of the arms 4, 5 is tapered towards the free end and consists of two pairs of angle profiles 6, 7, 8, 9. a support plate 10 (FIG. 4) is attached to the ends of one pair of superposed angular profiles 6, 7, preferably welded, and a cover plate 11 is attached to the ends of the other pair of superposed angular profiles 8, 9. an opposing second arm 5 is connected, preferably welded, to the ends of one pair of superposed angular profiles 6 ', 7' and a cover plate 10 'is attached to the ends of the other pair of superposed angular profiles 8', 9 ' . The free, spaced apart ends of the pair of superposed angular profiles 6, 7 of the first leg 4 are individually connected, for example welded, to a pair of superposed angular profiles 6 ', 7' of the second leg 5, thus forming a first assembly in the form of an open The free ends of the other pair of superposed angular profiles 8, 9 of the first arm 4 are also connected individually to a pair of superposed angular profiles 9, 9 '. the second arm 5, and forms a second, identical assembly is completely also in the shape of a flared V-backing plate 10, 10 'in the center is provided with an oval opening 12 and the cover plate Π. 11 * i ^e also in the central portion with a circular an opening 13 for interconnection with the fastening screws 14, 14 'of the side insulators 15, 15' oriented in the direction of the extension of the axis of each of the arms 4, 5. A fastening 16 of a not shown flag is fastened to the fastening screw 14. The two arms 4, 5 are formed in exactly the same way. On the opposite second arm 5 there is also drawn a shim 17 fastened to the fastening screw 14 'and carrying a pair of side insulators 15', 15. At the joints of the two arms 4, 5 of the two-arm bracket 1 there are pre-drilled holes for fastening bolts 18, 19.

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The apex bracket 2 is formed by a pair of identical U-profiles 20, 21 bent at right angles to the locking arms 22, 23 provided with a one-sided shoulder 24, 25 for interlocking when the U-profiles 20, 21 are opposed. holes 26, 27 for the fastening screw 28 of the top insulator 29. The profiles 20, 21 are provided with pre-drilled holes for the fastening bolt 30.

To mount the support bracket on the column shank 3, place the top bracket 2 on top of the column shank 3 by placing a pair of U-shaped sections 20, 21 opposite it, with the first U-shaped section 20 being pushed in manually by its Then, according to the pre-drilled holes, the column shank 3 is drilled, the fastening bolt 30 is inserted and the two U-profiles 20, 21 are pulled by it onto the column shank 3. A fastening screw 28 is inserted into the elongated holes 26, 27, which overlap in this case, and the top insulator 29 is screwed on and tightened thereon.

In the next phase of the mounting of the support bracket, at the desired distance from the top bracket 2 to the pole shaft 3, two open V-shaped assemblies consisting of pairs of angle profiles 6, 6 ', 7, 7' of the first leg 4 and other pairs of angle profiles 8 8 ', 9, 9' of the second arm 5 of the double-arm bracket J. According to the pre-drilled holes, the column shank 3 is drilled, the fastening bolts 18, 19 and the two open-ended assemblies are inserted.

They are pulled onto the shaft 3 of the column by them. The tapered ends of the assemblies are pressed together so that the cover plates 11, 11 'overlap the base plates 10, 10' and the annular holes 13 in each of the two cover plates 11, 11 'are aligned with the oval holes 12 in each of the two base plates. 10, 10 '. The fastening screws 14 are inserted into these openings 12, 13, and the side insulators 15, 15 'are screwed on and tightened.

Industrial applicability

Bare conductor support brackets for outdoor high-voltage power lines can be used especially for weight reduction and easier mounting on pole posts.

Claims (3)

PATENT CLAIMS Bare conductor support bracket for external high-voltage power lines, characterized in that it consists of side insulators (15, 15 ') provided with an open V-shaped double-arm bracket (1) and a top insulator (28) provided with a top bracket (2) ) for separate connection to the shaft (3) of the mast. Support bracket according to claim 1, characterized in that the two-arm bracket (1) is formed by a pair of opposing and mutually connected arms (4, 5) tapering to their free ends, the two-arm bracket (1) being formed by a pair of identical mounting assemblies, of which the first assembly comprises two pairs of angular profiles (6, 6 ', 7, 7') opposite and superimposed, which at one free end terminate in a fixed base plate (10) with an oval opening (12) and a second free end terminated by a fixed cover plate (1Γ) with a circular opening (13), while the second assembly comprises two opposite pairs of angular profiles (8, 8 ', 9, 9') that are at one free end terminated by a fixed cover plate (11) with a circular hole (13) and at the other free end terminated by a fixed base plate (10 ') with an oval hole (12) for engaging a circular bore (13) with fastening screws (14, 14 ') of the side insulators (15, 15') oriented in the direction of the extension of the axis of each of the arms (4, 5) of the two-arm bracket (1). -3 CZ 296091 B6 Support bracket according to claim 1, characterized in that the top bracket (2) is formed by a pair of identical U-profiles (20, 21) bent at right angles to the closing arms (22, 23) provided with a one-sided shoulder (24, 25). interlocking when the 5 U-shaped sections (20, 21) are opposite to each other, the locking arms (22, 23) being provided with elongated holes (26, 26), 27) for a top insulator mounting bolt (28) (29).