SU58867A1 - Low current multicore cable - Google Patents

Description

Multi-stranded, in particular, low-current cables with air insulation (or gas) and with remote support inserts made of insulating material, which provide constant distances between the cores and the shell and consist of two folded disks with radial cuts, in which the core is fixed when turning one disk relative to another.

The present invention relates to the construction of such a cable and consists in the fact that the shell of the latter is made in the form of a wooden pipe, made in the manner of ordinary pipes used in plumbing practice, i.e. consisting of rivets bonded with wire wound to them and coated outside waterproof cover.

In addition, according to the invention, abutment teeth are provided around the circumference of the distance inserts, which press into the wood of the shell when spraying the rivets of the pipe, and the radial cuts in the inserts are provided with tangential grooves.

In FIG. 1 depicts a cross-section of the proposed cable; FIG. 2 is a section along the line AB in FIG. one;

FIG. 3 - a schematic view of the cable after laying in the ground.

Remote disk inserts are marked with letters (b) and (c) in the drawing, radial cuts in disks with letters (d) and (e), tooth with letter (e), riveting pipe with letter (a) and wire for fastening with special letters (g) (fig. 2). Tangential grooves (.

Each pair of discs is held together by means of nuts (3). Discs can be made, for example, from porcelain. The conductors of the wire are fixed in the grooves (e) in the disks by turning the latter relative to each other before they are fastened with a nut (3).

As already mentioned, the cable sheath is a pipe-made of pine, spruce or larch rivets and other wood species preserved in petroleum bitumen until fully impregnated with the latter.

The manufacture of the cable must be mechanized and can be carried out on site.

The riveting machines that are piled around the tensioned wires in the chuck of the machine are pressed into the pipe, and during the pressing operations the abutment teeth (e) are pressed in

in wood staves. Then the pipe is wrapped with wire laid with coils, on top of which a layer of about 1.5 mm of asphalt bitumen is applied, which is then covered with a tape of roofing material or tol. The latter, in turn, is covered with a layer of asphalt, for example, consisting of: ferrous, ruberax, pitch and fillers.

According to the author, in this way the shell-tube will not be wetted and, due to the presence of non-freezing oily materials, will not sweat inside and, therefore, will have high dielectric properties.

In addition to this, to prevent the possibility of accidental humidification of the air in the cable, whether due to very sudden temperature changes or poor quality sealing of the end partitions at the outlet of the wires in the hatch or poor condition of the latter, alkaline air drying filters can be installed on each end panel.

fig)

FIG. 3

The subject matter of the invention.

Claims (2)

1. Low-voltage, multi-core gas-filled cable with remote inserts ensuring constant distance between the cores and the sheath, characterized in that the latter is made in the form of a wooden pipe made of rivets fastened by a wire wound on it and covered from the outside with waterproof cover. 2. The form of the cable according to claim 1, characterized in that the distance inserts, provided with circumferential support teeth, which are pressed into the wood of the shell when pressing the pipe rivets, are each made of two folded discs having radial cuts ending in tangential grooves in which the wires are secured by turning one disc relative to another. shig.g