FR2487108A1 - CABLE HAVING SEVERAL UNIQUE CONDUCTORS OR CONDUCTORS FOR TRANSPORTING ELECTRICAL ENERGY AND METHOD OF MANUFACTURING THE SAME - Google Patents

Abstract

A. MULTI-CONDUCTOR OR SINGLE CONDUCTOR CABLE FOR THE TRANSPORT OF ELECTRIC ENERGY AS WELL AS A PROCESS FOR ITS MANUFACTURING. B. CHARACTERIZED IN THAT THE INSULATED CONDUCTORS COMPONENTS 1 ARE CONSTITUTED BY CONDUCTORS OR STRANDS WITH SEVERAL WIRES, OF WHICH THE INDIVIDUAL WIRES 1 ARE THEY SAME CABLES WITH THEM WITH REVERSIONS OF WINDING PITCH SPACED OVER THEIR LENGTH. C. THE INVENTION APPLIES IN PARTICULAR TO THE TRANSPORT OF HIGH ENERGIES.

Description

The invention relates to a cable or a conductor, for the transport

  of electrical energy, with several conductors, in particular for low voltage, whose isolated conductors are

  wired with reversed wiring directions at intervals.

  Telecommunication cables have already been

  made in various dimensions by the process of cA-

  said "SZ wiring". In this process, it is known to wire certain individual elements with an alternating change by

  sections of the direction of winding. This mode of wiring gives the pos-

  to adopt winding and unwinding devices.

  and finally allows for absolute cabling.

lightly free of interruptions.

  This mode of wiring has also found its use in the manufacture of power transmission cables and corresponding drivers. Thus, patent DOS 2 202 643 proposes to wire strong-current pipes, with winding directions or winding lengths inverted at intervals, and this in the case of a very large number of conductors. individual constituting the cable. The technique of wiring with pitch reversal of the component conductors has also found its use for the transmission of very high energies and therefore for an increasing cross section of conductors. In this case, the strands of the cable are first combined into a bundle and then, during the course of a predetermined length, which is limited by a second wiring point, they are maintained as a tight state beam and, during the duration of this maintenance and this course, within the predetermined length, they are wired together (DOS

2,742,662).

  In all these processes, it is planned, initially

  for the cabling, as strands, of elements already wired, that is,

  that is, electrical conductors with

  pre. The manufacture of these strands is carried out before the wiring,

  in separate work operations of the latter, for

  which are provided winding, unwinding, winding conversion and position retention processes. It

  This is particularly the case in all cases where

  components do not have the shape of a massive bar, but

  are themselves made beforehand from individual threads

duels.

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  The invention starts from the known possibilities of cable

  ge S Z for cables and pipes included in the field of high voltage power transmission. She has

  to simplify and make it cheaper to manufacture

  such pipelines based on the SZ cabling technique. For this purpose, the cable according to the invention is

  characterized in that the insulated conductors

  conductors or strands with multiple wires

  individuals are also connected to each other with a sense of

  rolling reversed at intervals along their length.

  Such a cable meets the relevant requirements

  electrical properties, and offers satisfactory flexibility.

  health. According to another characteristic of the invention, the

  lation is applied directly to the strands which ensures, in a simple way, a secure hold of the individual wires in

the beam.

  For the manufacture of a cable or channel

  According to the invention, advantageously, the known wiring SZ of the strands is preceded by the

  wiring the individual wires of the conductors, unrolled

  fixed-line reserves, which is also carried out by

  In the case of an SZ wiring, the simultaneous isolation of

  ductors being made directly afterwards in an extruder,

  for example with multiple injection head. This simultaneous isolation

  is necessary to ensure that, in a subsequent work step, the wiring of the insulated strands with alternating winding direction at intervals is effected at the same time, and that, finally, the outer shell is applied, where appropriate, with interposition of a round inner envelope,

or a winding.

  This unfolding of the manufacturing process which,

  The purpose of this invention is to ensure that all the following operations follow each other in a continuous and unique manner, and allow for high production speeds. In addition, winding and unwinding devices can be dispensed with.

  which saves the necessary equipment time. He is

  to plan storage organizations for long-term

  strands made in advance.

  Depending on the material used for the conductors, it may be advantageous, according to another characteristic of the invention, to provide that the wired conductors wired in the direction version are, before their insulation, wrapped by a

  conductive or insulating tape. This measure may already be

  It is advantageous when the distance between the wiring device and the insulation extruder required by the machine must be so great that the risk of entanglement of the individual cabled wires can be feared. In the case, by cons, oh 1

  wiring device and the extruder are sufficiently close

  to ensure that the insulation is directly following the wiring,

  the yarns are safely held in position by the plastic mass

  injected tick, for example based on polymer.

  In the process according to the invention, it is important that the insulation of the conductors is performed at the same time as the wiring. For this purpose, it is possible to use, in correspondence with the number of strands, several extrudersi connected in parallel. Advantageously, especially from the point of

  view of the control of the entire installation, it can

  while it is preferable to provide a known multi-head extruder for simultaneous isolation of all strands. An improvement in the quality of the strands, in particular

  in the case of conductive elements of large cross-section

  the, is obtained according to the invention, providing that

  the conductive elements of the individual wires wired with inver-

  step, are compacted before their simultaneous isolation.

  For this purpose, it is possible, for example, to have, upstream of the insulation extruder or extruders of each conductive element, a connection

  traction or a pair of rollers having the same role.

  The individual wires of the conductive elements can

  All of them need to be wired together simultaneously, using known wiring devices. But it is also possible, according to a method known in the art of insulated strand wiring, to wire the individual wires of the conductors in layers,

  for example with a wire core wire.

  Another possibility of eliminating the risk of wiring before isolation, by increasing the position stability

  uninsulated conductors, consists, according to another characteristic

  invention, to group the individual wires of the con-

  conductor in several bundles, and to wire the conductive elements

  each of these beams with pitch inversion. The

  cages are then wired in strands also proceeding with

step reversal.

  The invention is explained below with the aid of an exemplary embodiment shown in the single figure of the appended drawing for the manufacture of conductors with strong currents

with several strands.

  From supply coils, not re-

  shown, the individual wires 1 of each partial conductor of the cable are fed to a wiring device 2, consisting for example of a rotary perforated disc, with which they are wired into conductive elements 3 with inverted winding direction at intervals. These conductive elements, for example four in the example shown, are fed to a four-head multiple extruder 4, in which they are provided with an insulation, so as to obtain the partial conductor or strand of the final cable. After passing through a cooling channel provided, if necessary, following, and not shown, these strands 5 are wired together with SZ-type wiring, by means of the device 6, shown schematically, and the core and obtained is fed to the inner casing extruder 7 and

  finally to the outer casing extruder 8. After

  of the cooling channel 9, the conductor or cable

  mined is wound on the fixed drum Il.

  Since the supply of stripped conductive elements

  until the finished product is rolled up, the process does not

  It displaces only small weights, giving the possibility of high production speeds. the winding and unwinding operations required to date in

  the manufacturing process, are here avoided.

  For the SZ wiring itself, different processes and different installations can be provided. However, for the SZ wiring of the bare, uninsulated lead wires, the device known in the cable manufacturing technique

  telecommunications (DE 2 615 275) has been shown to be particularly

  thoroughly satisfactory. This device is essentially

  immobile guide disc and a perforated disc

  in rotation, with a pipe with an outer surface

  smooth surface. This pipe is surrounded by another pipe

  4.- cradle, whose inner diameter is of such a size, that the holes in the perforated disc and thus also the holes

  guide disc, are inside this ex-

  In addition, on the perforated disk, there is provided a ring of peripheral holes, through which can be threaded the part of the elements to be wired through the holes

  of the guide disk and extending outwardly from the outer pipe

  laughing. It is thus possible to connect the individual wires in two superposed layers in each of which the wires are

wired with insertional meaning.

  Of course, the invention is not limited to this particular mode of wiring SZ. Depending on the nature and cross section of the conductive elements, it is possible to use

  other methods and other embodiments.

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Claims (8)

R E V E N D I C A T I 0 N S   1.- Multi-conductor cable or electrical energy transport conductor, in particular at low voltage, the insulated strands of which are wired together with inserts of spaced windings (SZ), characterized in that the insulated conductors components (1) consist of conductors or strands with multiple wires, the individual wires (1) of which are themselves wired together with insertions of winding pitch spaced along their length.   2. Cable according to claim 1, characterized in that the insulation is formed directly on the conductor strands. 3.- Process for the manufacture of a cable or a   conductor according to one of claims 1 or 2,   in which the wiring of the strands and the contribution of the other layers,   up to the final outer casing, are made in one suc-   continuous transfer of work operations, characterized in that   what the SZ wiring known to the partial conductors is previously   by the wiring between them of the individual wires of the conductors, unwound from reserve coils to fixed station, also realized   by SZ wiring, with a feed then directly to an   truders for the application of insulation on all   this isolation being followed, in the same operation of   SZ wiring between them isos conductors or strands   and finally by the application of the outer shell, especially after application of a round inner envelope or of a winding.   4. Process according to claim 3, characterized   in that the wired wires with inversions not spaced apart, are surrounded, before their isolation, by a band who keeps them together.   5. A process according to claim 3, characterized   inasmuch as the simultaneous isolation of all the drivers   or strands is produced in an extruder with an injection head multiple.   6. Process according to any one of the   3 to 5, characterized in that the individual wires braided together with pitch reversal conductors are   compacted in bundle before their simultaneous isolation.   7. Process according to any one of the 6.- 7? - 2487108   3 to 6, characterized in that the individual wires of the conductor are targeted in layers, for example on a core wire.   8. Process according to any one of the   3 to 7y, characterized in that the individual wires of the conductor are grouped in bundles and the conductive elements   of these beams are wired with pitch inversion, these   ceaux are then wired into conductive strands, also with step reversal.