FI94005B - Ridge construction for overhead power lines - Google Patents

Abstract

The invention concerns a suspension device for overhead power lines which comprises at least one pull-through device for a conductor 4 arranged in a framework 2 and at least one insulator 5 for mounting the conductor 4, where the pull-through device has been arranged to act as the final fixing point of the conductor 4. To achieve a simple and easy construction, the insulator 5 comprises a tubular component 6 provided with flanges parallel with the conductor 4 and acting as a pull-through device, the flanges being arranged transverse to the direction of the conductors 4 so that when the conductor is pulled through it can be pulled through the flat surfaces formed by the flanges and when the conductor is fixed it can be attached in a position going through the flat surfaces formed by the flanges. <IMAGE>

Description

94005

Ors structure for overhead lines

The invention relates to a spindle structure for overhead lines, comprising at least one conductor pulling device arranged on a frame structure for pulling a conductor and at least one insulator for conducting a conductor, the conductor pulling device being adapted to act as a final attachment point for the conductor.

The stem structures 10 used to support the overhead lines have most commonly been made of a metal material, such as aluminum or steel. Attachments made of, for example, ceramic material are attached to the ors, to which the air ducts are attached in a suitable manner. In order to route the overhead lines, special cable pulling devices with wheels or the like have previously been attached to the ors structures, which is required one for each conductor on each column.

The disadvantage of this known procedure is the large number of separate pieces and the labor of the guide wire, as the already 20 columns have to be climbed several times, i.e. the guide devices have to be raised, retrieved, etc.

In addition, an insulator provided with a cable pulling device is known in the art. Such an insulator is described, for example, in FI patent publication 75443.

·. 25 The disadvantage of this known solution is that such an insulator is very expensive, considerably more expensive than a conventional insulator. Another disadvantage is the inconvenience of separate songs.

In order to eliminate the above drawbacks, other types of solutions have been developed in the field, an example of which is the structure disclosed in FI patent publication 89315. This ore structure is intended to be molded from an insulating material. The same casting may also include insulators and grooves 35 for conducting the conductor. However, the structure is quite traditional and is based on the 2 94005 types currently in use. The most significant difference compared to previously used types is mainly the choice of material.

The object of the invention is to provide a solution by means of which the disadvantages of the previously used technology can be eliminated. This has been achieved by means of the ors structure according to the invention. The ors structure according to the invention is characterized in that the insulator comprises a tubular, conductor-oriented, flanged part 10 with flanges, the flanges of which are arranged transverse to the direction of conductor so that the conductor can be pulled through the flange-formed surfaces of the flanges. running position.

The advantage of the ors structure according to the invention is, above all, that no separate wiring devices are required. In addition, the ors structure can be shaped very freely, thus providing a virtually flexible structure. The invention also has the advantage of its lightness and easy attitude. In series production, the unit price will be lower than with the current ore-intensive ors assemblies.

The invention will now be described in more detail by means of the preferred embodiments described in the accompanying drawing, in which Figure 1 shows a perspective view of a first preferred embodiment of an ors structure according to the invention, Figure 2 shows a perspective view of a second preferred embodiment of an ors , Fig. 4 shows another detail of the ors structure according to the invention in a schematic sectional view and Fig. 3 94005 Fig. 5 shows a perspective view of a third preferred embodiment of the ors structure according to the invention.

Figure 1 shows a first preferred embodiment of an ors structure according to the invention. Reference numeral 1 5 denotes a column and reference numeral 2 denotes a frame structure which in this embodiment is fastened to the column 1 by means of suitable fastening means, for example bolts and nuts 3. Reference numeral 4 denotes in Fig. 1 conductors, which in this embodiment have three pieces, i.e. in this embodiment three phases of the air duct are installed in the slave structure. Insulators fitted to the frame structure 1 are indicated in Figure 1 by the general reference numeral 5.

According to the essential idea of the invention, the insulator 5 15 comprises a tubular, conductor-like part with a flange 7 acting as a conductor. the principle of the structure is clearly shown in Fig. 3, which shows an insulator application of the ors structure according to the invention in a principal sectional view. The flanges 7 are arranged in a transverse position 20 with respect to the direction of travel of the conductor 4 so that the conductor 4 can be pulled through the planar surfaces formed by the flanges 7 during the drawing step and fixed in the position passing through the planar surfaces formed by the flanges 7 as shown in Fig. 3.

. In the embodiment according to Figures 1 and 3, the ors structure is a unitary casting comprising a frame structure 2 to be attached to the column 1 and insulators 5. As can be seen from Figure 3, the insulators 5 are tubular, conductive parts. The flanges 7 of the insulators are arranged in a transverse position 30 with respect to the conductor 4 passing through the tubular part 6. It has been found to be particularly advantageous to fit the flanges 7 at an angle of substantially 90 ° to the conductor, since the above position is the most electrically advantageous solution. The electric field inside the insulator can be controlled by designing the insulator 35 as ideal as possible. The number of flanges can of course be freely selected according to the current need and situation. In the case of PAS conductors, the electrical dimensioning of the insulator can be reduced by reducing the flanges.

5 The flanges of the insulator can also be manufactured as separate parts and fastened to the tubular part, for example, by the principle of shrinkage. The flanges can be made of, for example, woven plastic or rubber material. Such an embodiment is shown in Figure 4, in which the body part is illustrated by reference numeral 12 and the tubular part by reference numeral 16. The flanges in this embodiment are described by reference numeral 17. The conductor is shown in Fig. 4 by reference numeral 4. When using separate insulating flanges, the casting mold of the orsi structure is simple and inexpensive. However, it is of course also possible to form an insulator or tubular part from a separate part and to fasten it in a suitable way to the frame structure.

As can be seen from the figures, the conductor 4 can be pulled through the tubular part 6, 16 of the insulator in the drawing phase, whereby no separate traction devices, i.e. traction wheels or traction grooves, are required. In the invention, the tubular part acts both as a traction device and as the final attachment point of the conductor.

The conductor 4 can be attached to the insulator 5 by any suitable member. Figures 3 and 4 show embodiments in which the conductor 4 is attached to the insulator 5 by means of a wedge member 8, 18 to be fitted to the tubular part 6, 16. The wedge member 8, 18 can be formed, for example, by means of round wedges split on one side. 30 The lip in the insulator locks the wedge in place. It is clear that the conductor can also be locked to the insulator, for example by means of a specially designed threaded bandage 28, as shown in Fig. 2.

Figures 2 and 5 show two other preferred embodiments of the ors structure 35 according to the invention. The embodiment of Fig. 2 94005 differs from the embodiment of Fig. 1 with respect to the design of the frame structure. The frame structure is denoted by reference numeral 22 in Fig. 2. in other respects the same reference numerals as in Fig. 1 are used in Fig. 2. The embodiment of Fig. 5 differs from the above two other embodiments in that in the embodiment of Fig. 5 the frame structure is adapted to support only one insulator. In this embodiment, the frame structure is denoted by reference numeral 32. In this embodiment, the frame structure is in fact an insulator mounting arm. 10 In other respects, the same reference numerals are used in Fig. 5 as in Figs. 1 and 2. The structures according to Fig. 5 are naturally fitted to the column as many as the conductors to be supported. case is.

The material of the stem structure according to the invention may be, for example, a reinforced plastic mixture, a casting resin or the like. With the elasticity of the material, the structure can be made to dampen possible conductor vibrations and withstand knocks during transport and installation.

The application examples presented above are in no way intended to limit the invention, but the invention can be modified completely freely within the scope of the claims. Thus, it is clear that the ors structure according to the invention or its details do not necessarily have to be exactly as shown in the figures, but other solutions are also possible. For example, the frame structure does not necessarily have to be exactly as shown in the figures, but very different solutions may be possible, as stated above. Correspondingly, the structural details of the insulators can differ considerably from the examples shown in the figures. The flanges can also be formed, for example, from a helical structure, etc. The invention is also in no way limited exclusively to plastic materials or the like, but the frame structure can also be made of another material, for example metal, if necessary. In this case, 6 94005 must, of course, be provided with suitable insulation, for example an inner tube of insulating material, if necessary. The invention can be applied in connection with all kinds of overhead lines, also in connection with, for example, bright conductors 5, etc. It is also possible to form the stem structure as an integral part of the column if such a solution is considered advantageous in some situation. There is also nothing to prevent the stem structure from forming an integral part with the column part, in which case the stem structure could form, for example, the upper end of the column, etc.

Claims (6)

An air conduit ash structure comprising at least one conductor assembly (2, 12, 22, 32) provided for conducting a conductor (4) and at least one Insulator (5) for installing the conductor (4). wherein the wiring harness is arranged to serve as the final point of attachment of the conductor (4), characterized in that the insulator (5) comprises a tubular, in the direction of the conductor (4), which acts as a wiring harness (6, 16). ) provided with flanges (7, 17), which flanges (7, 17) are arranged transversely in relation to the running direction of the conductor (4) so that the conductor can be pulled through the plane formed by the flanges (7, 17) at the drawing stage. The surfaces and in the installation stage are fixed in a position made by the flat surfaces formed by the flanges (7, 17). 2. Ash construction according to claim 1, characterized in that the flanges (7, 17) of the insulator are arranged at a substantially 90 ° angle in relation to the running direction of the conductor (4). Ash structure according to any of the preceding claims, characterized in that the flanges (17) are formed of separate parts which are fixed in the tubular part (16). Ash structure according to claim 1, 2 or 3, characterized in that the body structure (2, 12, 22, 32) and the insulators (5) are made in a uniform piece. 5. Ash construction according to claim 4, characterized in that the unitary piece is made of plastic material. Ash structure according to any of the preceding claims, characterized in that the conductor (4) is arranged to be secured by means of a wedge member (8, 18) arranged in the tubular part (6; 16). Il