RU2231189C1 - Gear for intermediate attachment of 1 kv aerial line with self-bearing insulated wire - Google Patents

Abstract

FIELD: electric power engineering, equipment for attachment of aerial power lines made of self-bearing insulated wires.

SUBSTANCE: proposed gear for attachment of aerial power lines has bracket supplemented with reinforcing upper cantilever and reinforced vertical stiffness rib with hole intended for attachment of additional facilities raising reliability of aerial line. Gear also has clamp with solid base without any hole for lock of bearing wire of aerial power line reinforced with stiffness ribs from rear side. To lock bearing wire of aerial power line there are provided toothed platforms on two sides (front and rear), which contact toothed platforms of locks holding bearing wire in bed of clamp. Design of lock makes it possible to employ gear for wires of various diameters and ensures required degree of pressing of wire against bed of clamp. Operational reliability of aerial power line enhances due to usage of proposed gear thanks to rise of strength characteristics of bracket and clamp, thanks to expansion of functional characteristics of gear as whole which results in rise of operational reliability of aerial power line during long operation.

EFFECT: enhanced operational reliability of aerial power line.

13 dwg

Description

The invention relates to the electric power industry, and more specifically to overhead power transmission lines with voltages of up to 1 kV made of self-supporting insulated wires (overhead lines from SIP), namely, devices for attaching overhead lines from SIP to intermediate supports and building facades.

Known devices for attaching OHL from SIP to intermediate supports, consisting of an arm made of metal [1, 2, 3, 4] and a clamp made of plastic [1, 2] or an aluminum alloy coated with weather-resistant plastic [5].

Closest to the proposed technical solution is the device [1], consisting of a bracket in contact with a support or with the wall of the facade of the building, and a clip mounted on the bracket using an intermediate link. The bracket has a main horizontal supporting part, which abuts against the base and ends with a trunk-shaped open hook on which an intermediate link is attached. The structural strength of the bracket is ensured by vertical stiffeners reinforcing the main supporting part, one from the bottom in the center and two from the top at the edges. An intermediate link is hung on the bracket hook, to which a clip is attached with a finger that supports the overhead line from the self-supporting insulated wire by fastening the supporting insulated wire in it. The clamp has a base, ending at the bottom with a curved hook-shaped end, forming an arcuate bed from the inside, into which the VL HI wire from the SIP is placed, pressed to the bed and fixed in it by a clamp in the central part of the clamp base. The latch is mounted on the back of the clamp base, where it can be folded down to release the bed for laying the OHL main wire from the SIP, and transferred to the fixation position of the wire in the front of the clamp through the hole in the middle of the clamp base. The advantage of such a device is the openness of the hook, which allows for the detachable connection of the bracket to the clamp, which in turn allows repair work on the overhead line from the SIP and ensures maintainability of the individual parts of the fastening device of the overhead line from the SIP.

The disadvantage of this device is that in the bracket the upper vertical stiffeners must be thin to ensure that the bracket is secured to the support with a bolt, which gives a slight increase in structural strength. In addition, this bracket is of little use in the arrangement of overhead lines from SIP with additional devices on supports, such as, for example, a diagnostic system, since it does not allow fixing the linear element of such a system on a support with sufficient reliability and economy. The presence of a hole for the retainer in the base of the clamp of this device weakens the clamp, which can lead to its destruction during prolonged exposure to overhead lines from SIP wind loads and overloads from sticking to the wires of wet snow or ice when ice.

These circumstances reduce the reliability of operation of overhead lines from SIP in the conditions of long-term operation.

The objective of the invention is the creation of an economical device for the intermediate fastening of overhead lines from self-supporting insulated wires, which has increased reliability in long-term operation.

The solution to this problem is achieved by the fact that the device for attaching the overhead lines from the self-supporting insulated wire to the intermediate support or to the wall of the building facade contains a bracket fixed by a base on a supporting surface and having a main supporting horizontal part (middle or main console), reinforced with one vertical stiffener, located below and in the middle of the middle console, and two additional consoles, one of which is located above the middle console and the other below it, and starting at the base and ending at the half-ring, while the upper console descends smoothly in an arc to a semicircle. The middle console starts at the base of the bracket and ends with a semicircle with a bounding pad at the end, used to string an intermediate link holding the clamp on it. The restrictive area of the half-ring does not allow the intermediate link to jump off the half-ring when the overhead line is thrown back onto the bracket under the influence of wind loads. The vertical stiffening rib of the bracket is reinforced with a round thickening having a through hole used to fasten devices that increase the reliability of overhead lines from SIP, for example, an icing device, or a remote diagnostics device for overhead lines from SIP. The clamp, fixed with a finger on the intermediate link, has a solid construction base, reinforced on the back with stiffeners and forming a curved wide hook-shaped end from the bottom, which has an arc-shaped bed in the upper part, into which a supported carrier wire is placed, pressed to the bed and fixed in it two clamps on the edges of the bed. The latches with the inner protrusion carry out the clamping of the wire and with the help of internal gear surfaces and restrictive flanges are fixed on two pairs of toothed platforms of the clamp, two of which are located on the back of the clamp, and the other two on the front side of the hook-shaped end. Lateral placement of latches provides integrity and additional structural strength.

The essence of the invention is illustrated in figures 1-13. Figure 1 shows the fastening device of the overhead line of SIP and the location of the carrier insulated wire. Figure 2 shows a bracket having an upper reinforcing console and a round seal on a vertical stiffener with a hole for additional devices. Figure 2 also shows the option of mounting the bracket to the supporting surface using a bolt with a nut and washers. Figure 3 shows the bracket from the side of the half ring. Figure 4 shows an intermediate link providing clamp suspension flexibility. Figure 5 shows a finger that connects the intermediate link to the clamp. Figures 6 to 9 show a clamp having an integral structure without an opening for a wire clip, and toothed platforms for securing the clips. Figure 6 shows the clip on the front side, where the orientation of the toothed platform is visible, and a local section shows the bottom profile of the bed in which the supported wire is placed. 7 shows a side view of the clamp, where it is seen how the hook-shaped end forms a bed for the wire. On Fig shows the back side of the clamp, which shows the ribs and a pair of rear toothed platforms. Figure 9 shows in cross section the shape of the teeth of the front gear platform clamp. In Fig.10 and Fig.11 shows a wire retainer having an inner protrusion in the center for clamping the wire and internal gear pads with restrictive sides. Figure 10 shows the toothed platform of the latch on its front wall, and figure 11 - on the rear wall. On Fig in cross section shows the junction of the toothed areas of the clamp and the latch. On Fig shows the option of mounting the bracket to the support using two strips of metal tape, and also - the option of placing on the bracket module diagnostic system VL from SIP.

The intermediate fastening device of the overhead line from the SIP (Fig. 1) contains a bracket 1 fixed to the supporting surface and a clamp 4 supporting the insulated wire 6 and suspended to the bracket 1 through the intermediate link 2 and pin 3. To prevent the wire 6 from popping out of clamp 4 There are two clamps 5, fixed on the body of the clamp 4.

The bracket 1 (figure 2 and figure 3), mounted on a support with its base 7, has a middle console 8 connecting the base 7 to the half ring 9 and tapering from the base to the half ring. The structural strength of the bracket is provided by consoles and a stiffening rib: consoles of the upper 10 and lower 11, as well as a vertical stiffening rib 12 connecting the base 7 with the middle console 8, half ring 9 and the lower console 11. The upper console 10, descending in an arc to the junction 13 of the console 8 with a semicircle 9, supports this joint, being fixed in the upper part of the base 7, thereby providing increased structural strength. The structural strength is also increased by a round thickening 14 on the rib 12. The thickening 14 has an opening 15, intended for fastening additional devices in it, ensuring the reliability of the overhead line from SIP. At the base 7, a conical hole 16 is provided, through which, using a bolted connection 17 (FIG. 2), the bracket is attached to the supporting surface 18. The restriction pad 19 (FIG. 2 and FIG. 3) allows the intermediate link 2 to be strung (FIG. 4) through the hole 20 to the half ring 9, if the link 2 is placed with the longitudinal axis perpendicular to the plane of the bracket 1. At the same time, the platform 19 does not allow the link 2 to jump off the half ring 9 in the working position (figure 1) when the overhead line is thrown from the SIP onto the bracket from above.

The clamp 4 has an opening 21 (FIG. 6 and FIG. 8), through which the clamp is attached to the fork 22 of the link 2 (FIG. 4) with a finger 3 (FIG. 3), as shown in FIG. The loss of the finger 3 from the holes 23 of the fork 22 of the link 2 is prevented by the petals with thickenings 24, made using the slots 25 at the end of the finger 3 (Fig.3). The clamp 4 has the following main elements: the eyelet 26 with the hole 21, the base 27, the hook-shaped end 28, the gear platforms 29 and 30, as well as the stiffeners 31. The base 27 of the clamp (Fig.6, Fig.7 and Fig.8) has a solid the construction is without holes and is expanded downwards, which gives an even distribution of the load over the cross section and ensures the strength of the clamp. From the bottom, the base of the clamp 27 ends with a hook-shaped end 28, which in bend forms a saddle-shaped bed 32 (Fig. 7) with an arcuate bottom 33 (Fig. 6 and Fig. 7), into which the load-bearing wire of the overhead line is made of SIP 6. For fixing the clips 5 to Clamp 4 has four toothed pads 29 and 30: two pads 29 on the front wall of the end 28 and two on the back of the clamp 30. The pointed teeth on the gear pads, the profile of which is shown in section AA (Fig. 9), are directed so in such a way as to provide the most durable grip of the latches 5 s per Imam 4.

Stiffening ribs 31 (Fig. 8) located on the back of the clamp main part 27 increase the clamp construction strength.

The immobility of the latches 5 in the working position on the clamp 4 (Fig. 1) is provided by the toothed platforms 34 and 35 and the restrictive sides 36 and 37 made on the lock (Fig. 10 and 11), which in this position are in contact with the corresponding gear platforms 29 and 30 of the clamp 4 (Fig.6, Fig.7, Fig.8). The engagement profile of the teeth 29 located on the clamp with the teeth 38 of the pads 5 of the clips 5 is shown in FIG. In the design of the clamp, a protrusion 39 is provided (Fig. 10), which is in direct contact with the supporting wire of the overhead line of SIP 6 and which is placed asymmetrically inside the clamp relative to the walls of the clamp, which is explained by the difference in thicknesses of the end 28 and the base 27, on which the gear platforms 29 and 30 are made (Fig.7).

The device provides the ability to change the distance between the protrusion 39 of the retainer 5 and the bottom of the bed 33 of the clamp 4, thereby realizing the possibility of fixing wires of various diameters in the clamp without reducing the reliability of fixation. For this, it is necessary to extend the shank 40 of the retainer 5 (Fig. 10), insert the retainer from the side of the overhead transmission line from the SIP to the lateral arc 41 of the clamp (Fig. 8) and, having selected the height of the retainer 5, so that the wire 6 is pressed tightly by the protrusion 39 to box 32, release the shank 40 so that the toothed pads 34 and 35 of the retainer engage tightly with the toothed pads 29 and 30 of the clamp.

The bracket is made of a corrosion-resistant aluminum alloy or of steel with an anti-corrosion coating, and all other parts are made of glass-filled polyamide.

The bracket is mounted with a clamp to the support or two pieces of metal mounting tape 42 (Fig.13), or one bolt connection 17 (Fig.2), or one screw, by analogy with a bolt. The bracket is mounted to the support with two strips of metal tape as follows: the first tape is inserted through the hole formed by the base 7, the middle console 8 and the upper console 10, and the second tape is passed through the hole 43 made in the vertical rib 12 (Fig. 2 and Fig. thirteen). Next, the tape in turn is pulled together with a special tool and secured with mounting clips.

An example of the use of an additional hole 15 in the bracket 1 for the VL diagnostics system from the SIP is shown in Fig. 13, where the diagnostic system module is placed in an airtight container 44, suspended using the ears 45 through the axle shaft 46 passing inside the hole 15, to the bracket 1. In this case The method of fastening the module for the VL diagnostics system from the SIP does not require the use of an additional node for fastening it to the support, which provides cost savings when installing the linear part of this system.

The proposed technical solution for the intermediate fastening device for overhead lines made of self-supporting insulated wires makes it possible to increase its reliability by introducing an additional console into the bracket design, which strengthens the junction of the main console bracket with a half ring, onto which a clip with a carrier wire is suspended through the intermediate link, and using a round thickening with a mounting hole additional devices, as well as due to lateral fixing of the wire in the clamp with two clamps, which does not require a hole in the base of the clamp and, accordingly, It allows you to increase the strength of the clamp and the device as a whole.

Sources of information

1. Linear fittings for installation and repair of self-supporting insulated wires VLI 0.38 kV. Advertising catalog of the company NILED, France. (ES1500E intermediate suspension kit.)

2. Linear fittings for self-supporting insulated wires (SIP) for voltage up to 1 kV. The advertising catalog of the company TYCO, USA. (Supporting clamps of the SIMEL brand.)

3. French patent No. 2765740, cl. H 02 G 7/05, prior. 07/01/97

4. French patent No. 2780826, cl. H 02 G 7/05, prior. 06/30/99 g.

5. Linear fittings for self-supporting insulated wires VLI 0.4 kV. Advertising catalog of the company ENSTO, Finland. (Support clamp SO 69.)

Claims (1)

A device for intermediate fastening of an overhead power transmission line (VL) with a voltage of up to 1 kV, made of a self-supporting insulated wire, containing a bracket fixed by a base to the supporting surface, having a half-ring with a limiting platform at the end of the horizontal supporting part, and a clip connected via an intermediate link to the bracket half-ring , in the bed of which the overhead line of the overhead line is located and fixed, characterized in that at the bracket the connection point of the horizontal supporting part with a half ring It is completely strengthened by the upper reinforcing console connecting this connection point to the base of the bracket, which also has a round thickening on the vertical stiffening rib with an opening used to hang additional devices on the bracket that increase the reliability of the overhead line, in addition, on the clamp, the base of which has an integral design , there are toothed platforms in pairs on the front and on the back sides, on which two clamps are fixed, having reciprocal toothed platforms on the inner sides with bounding with the bumpers that provide fixed fastening of the clamps on the toothed platforms of the clamp, as well as the clamps have protrusions that press the OHL carrier wire to the clamp bed, and a shank that can be extended to move wires of various diameters by moving the clamp in the direction perpendicular to the axis of the wire and provide the required degree of pressure of the wire to the clamp bed.

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