EP0007473B1 - Device for sz stranding power current cable cores with a sector-shaped conductor cross-section - Google Patents

Device for sz stranding power current cable cores with a sector-shaped conductor cross-section Download PDF

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Publication number
EP0007473B1
EP0007473B1 EP79102228A EP79102228A EP0007473B1 EP 0007473 B1 EP0007473 B1 EP 0007473B1 EP 79102228 A EP79102228 A EP 79102228A EP 79102228 A EP79102228 A EP 79102228A EP 0007473 B1 EP0007473 B1 EP 0007473B1
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EP
European Patent Office
Prior art keywords
stranding
nipple
distance
rotating device
sector
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Expired
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EP79102228A
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German (de)
French (fr)
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EP0007473A1 (en
Inventor
Dieter Vogelsberg
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Siemens AG
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Siemens AG
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Priority claimed from DE19792921092 external-priority patent/DE2921092A1/en
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0007473A1 publication Critical patent/EP0007473A1/en
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    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B3/00—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material
    • D07B3/005—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material with alternating twist directions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/02—Stranding-up
    • H01B13/0235—Stranding-up by a twisting device situated between a pay-off device and a take-up device

Definitions

  • the invention is in the field of electrical cable manufacturing technology and deals with the SZ stranding of high-voltage cable cores with a sector-shaped conductor cross-section, with particular attention to the mechanical forces that occur.
  • Such positive guidance can consist of several profiled rollers arranged in a straight line one behind the other, between which the respective wire runs (DE-A-22 11 111).
  • a type of stranding is also known in which the sector cores are stranded with a twist direction that changes at intervals.
  • Such a type of stranding has found its way into the past few years under the name "SZ stranding in the manufacture of telecommunication cabins and power lines, but the SZ stranding machines developed for this purpose cannot be used for stranding sector wires without appropriate further development, since stranding sector wires because of the large conductor cross-sections (a. 35 mm 2 ) large mechanical forces can be controlled.
  • an oscillating stranding disk arranged in front of a stranding nipple is provided as the actual stranding tool, which is coupled to positive guides for the sector wires.
  • a further twisting device in the form of a roller or tape take-off can be arranged between the stranding nipple and the take-off and winding device, each rotating in the opposite direction of rotation as the oscillating stranding disk.
  • the sector wires directed in front of the stranding nipple with a stranding device which is arranged between a first and a second stranding nipple and which rotates with the direction of rotation changing in sections.
  • the sector wires are stranded in the same direction in the first stranding nipple for the first time and in the second stranding nipple for a second time.
  • the direction of rotation of the stranding device which consists of one or two collet deductions arranged one behind the other, is changed at intervals which are matched in a known manner to the storage capacity of the device (DE-A-27 42 662).
  • a stranding method for stranding wires for communication cables, in which the stranding elements are stranded with the aid of an elongated memory with alternating rotary movement.
  • the stretched memory consists of two stranding heads arranged between two stranding nipples. The direction of rotation or the speed of rotation of the stranding heads is changed at intervals that are matched to the length of the extended memory (FR-A-1 447 458, DE-A-22 30 972).
  • stranding heads which are designed in the manner of a caterpillar take-off (DE-A-17 90 249) or consist of a deflection roller which is once wrapped around by the stranded material and arranged tangentially to the stranding axis (DE-A-17 65 452).
  • the invention has for its object to improve the known stranding device for SZ stranding of non-pre-twisted power cable cores with a sector-shaped conductor cross-section (DE-A-2514033) in such a way that a larger number of twist strands can be applied in each direction and that the stranded material in Area of the reversal points of the twist direction has a precise stranding geometry and that these reversal points are made as short as possible.
  • the invention is based on a device for SZ stranding of power cable cores with a sector-shaped conductor cross-section, which consists of fixedly arranged core supplies, a stranding nipple with positive guidance arranged in front of it for each cable core, a twisting device rotating behind the stranding nipple, rotating with rotating movement, and one Take-off and take-up device exists.
  • the positive guides are arranged spatially fixed, that the twisting device is followed by a second twisting device rotating synchronously with it and spaced apart therefrom with a second twisting nipple (twisting point) arranged behind it, the distance from the last point of application of the second twisting device is equal to or approximately the same as the distance of the first stranding nipple from the first point of application of the first twist tion device and that the distance between the last point of application of each positive guidance on a cable core and the first point of application of the first twisting device on the stranded material is less than or equal to the lay length of the stranded material given by the take-off speed and the rotational speed or speeds of the stranding device. This latter distance is preferably less than or at most equal to half the lay length of the stranded material.
  • the sector wires are effectively stranded together in a short way both in the area of the first stranding nipple and in the area of the second stranding nipple, the lengths of the torsion change points in the individual cable wires being matched to the length of the twist change points of the cable wires stranded together.
  • the invention is based, inter alia, on the consideration that the second twist of the stranding assembly in the region of the second stranding nipple proceeds without disruption when the first twisting in the region of the first stranding nipple has led to a precise stranding geometry.
  • the prerequisite here is that the change in the rotational movement of the stranding heads is precisely matched to the distance between the two stranding nipples and stranding heads, that is to say to the storage length of the elongated memory formed by the stranding nipples and stranding heads.
  • the most accurate stranding geometry of the cable cores can be obtained if the torsion of the non-twisted cable cores and the formation of the torsion change points as well as the twist change points take place as short as possible and the forces required for this not only on the outer surface of the cable cores combined into one strand, but also attack the individual cable cores themselves as long as they are not stranded.
  • the path that is kept as short as possible should in no case be greater than a lay length of the stranded cable cores. In view of the lay lengths of around 150 cm customary in sector conductor cables, this means that the distance between the positive guides and the stranding device is as much as 60 to 100 cm.
  • the first rotating stranding head and the positive guides for the cable cores should, as already mentioned, be spatially closely adjacent to one another. In this case, the flow of force runs from the rotating stranding head over the stranded material to the positive guides over relatively narrow paths.
  • the individual machine elements must be carefully dimensioned so that no wire damage occurs here.
  • some of the guide rollers arranged on both sides of the wavy line can face each other in pairs or in a gap, in particular in an area in which the wavy line changes its curvature.
  • a positive guide if it consists of two deflection disks arranged one behind the other, on which the respective cable core rests with a wrap angle of at least 90 °.
  • Such deflection disks provided with a profile groove allow particularly gentle treatment of the sector-shaped cable cores.
  • this distance can be bridged by one or more profiled guide rollers; these guide rollers are expediently arranged along a curved line, so that the respective cable core is pressed against these profile rollers by converting longitudinal forces into transverse forces.
  • the stranding heads arranged behind or in front of the stranding nipples must also be designed with regard to the transmission of the greatest possible forces and with regard to the arrangement as close as possible to the stranding nipples. Caterpillar belt arrangements or clamping jaw or collet devices are suitable for this.
  • the use of a single-disk twister, in which the stranding head consists of a deflecting disc which is once wrapped around by the stranded material and is arranged approximately symmetrically with respect to the stranding axis, is also advantageous with regard to gentle handling of the stranded material.
  • the devices shown schematically in the figures essentially consist of construction elements as are known to the person skilled in the art, such as a spool, perforated disc, deflection roller, positive guidance, stranding nipple, stranding head, caterpillar belt or clamping jaw take-off, extruder, water cooling section, take-off and winding device. Therefore, a con structural representation of these components omitted.
  • the device shown in Fig. 1 is used for stranding three high-voltage cable wires 2 to form a stranding 7.
  • the plastic-insulated cable wires 2 have a sector-shaped conductor cross section and are not pre-twisted. They run from fixedly arranged core stocks 1 and are fed to the stranding nipple 5 via deflection rollers 3 and positive guides 4.
  • a stranding head 6 or 8 rotating with an alternating rotary movement is arranged, which non-positively embraces the cable wires brought together in the stranding nipple 5 from outside and twists or strands together.
  • Each stranding head consists of a caterpillar belt arrangement or an arrangement in the manner of a clamping jaw trigger.
  • the crawler belts or clamping jaws are driven in the direction of the stranding axis by the stranding material passing through at a constant take-off speed v, but can also be driven from the outside and move the stranding material in the longitudinal direction of the stranding axis.
  • the rotational movement i.e. the speed or the direction of rotation of the stranding heads 6 and 8 is changed synchronously at intervals which are matched in a known manner to the running time of a longitudinal element of the stranded material from the first to the second stranding nipple or from the first to the second stranding head.
  • the stranded material is picked up by the take-off device 9 and wound onto the winding device 10.
  • the reversal points of the twisting direction of the stranded material cannot be expected to rope up under the influence of tensile stresses, since the cable wires 2 are plastically deformed in the region of the reversal points and thus ensure a stable stranding geometry .
  • special guide elements for the stranded material can be arranged between the stranding heads 6 and 8.
  • the take-off device 9 can be omitted if one or both alternating rotating twisting heads take over their function. A deflection pulley or the like is then to be provided as the second stranding point.
  • the effective distance of the stranding head 6 from the stranding nipple 5 is denoted by b, the effective distance of the positive guides 4 from the stranding nipple 5 by a.
  • the sum of the distances a and b and thus also the length c between the stranding head 8 and the stranding point formed by the trigger 9 should be less than a lay length of the material to be mixed.
  • the positive guides 4 consist of pairs of opposing roller groups, the individual rollers being profiled and these profiles being precisely adapted to the cross-sectional shape of the sector cores 2.
  • the profiling and the contact pressure between the roller groups prevent the sector wires 2 from rotating in the area of the positive guides 4.
  • the longitudinal movement of the sector veins is not hindered.
  • positive guides 11 which also consist of profiled deflection rollers 12.
  • these deflecting rollers are arranged on a corrugated line, in particular an S-shaped curved line, so that the deflection of the cable cores which is achieved in this way converts the longitudinal forces effective as a result of the withdrawal movement into transverse forces.
  • a special pressing of the profile rollers 12 on the cable cores is therefore not necessary.
  • deflecting rollers face each other in pairs or at a gap. The advantage of such an arrangement can be seen in the fact that a particularly small distance between the last guide roller of a positive guide 11 and the stranding nipple 5 can be achieved.
  • Fig. 3 shows a positive guide 13, which can absorb particularly large forces.
  • two relatively large, profiled deflection disks 14 and 15 are provided, which are arranged one behind the other and are encircled by a cable core over an angle of approximately 180 ° in each case.
  • the distance between the outlet point of a cable core on the second deflection disk 15 and the stranding nipple 5 is expediently bridged using one or more profiled guide rollers 16. It is advisable to arrange the guide roller 16 in such a way that the cable core is guided on a curved line on the way from the deflection disk 15 to the stranding nipple 5.
  • FIG. 3 shows at the same time an advantageous embodiment of a stranding head 17 arranged behind the stranding nipple 5.
  • This is constructed in the manner of a single-disc twister and consists of the deflecting disc 18, which is twisted around by the stranded material 7 and has two for feeding and discharging the stranded material Guide rollers 19 are assigned.
  • Such a stranding head requires relatively large transverse dimensions depending on the diameter of the stranded material, but with regard to the lay length of approximately 1.5 m provided for cable cores with a conductor cross section of, for example, 150 mm 2 , this results at a take-off speed of, for example, 40 to 75 m / mn Speeds of the stranding head in the order of 10 to 60 U / mn.
  • the inertial forces of such a stranding head that occur during stranding are, however, significantly smaller than in the case of conventional stranding with rotating coils.
  • the profile of the deflection disk 18, which can optionally also be designed as a pull-off disk, is slightly conical.
  • the center of gravity of the deflection disk 18 is preferably somewhat outside the stranding axis.
  • Fig. 4 shows a device in which the stranding of the cable cores 2 to form a strand 7 with an extrusion process for application a cable jacket is linked and with which a complete cable 25 can thus be produced from cable cores 2.
  • the stranding part which essentially corresponds to the devices shown in FIGS. 1 and 3 and contains the two stranding heads 17 and 20, is followed by an extrusion line formed from the extruder 23 and the water cooling channel 24, which runs parallel to the stranding path and the stranding bandage 7 is fed via the deflection disks 21 and 22.
  • the stranding heads of which only change the speed, but not the rotational movement, take-off speed and speeds can be coordinated so that the lay length of the stranded material in the area of the stranding device, for example, alternately + 66 cm and + 200 cm is so that there is a lay length of ⁇ 100 cm in the finished stranded material. If the direction of lay remains the same within the stranding device, it is ensured that large transverse forces can be transferred from the stranding heads to the stranded material without the stranding elements (sector wires) lying parallel in one plane in the area of the twist change points.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Processes Specially Adapted For Manufacturing Cables (AREA)
  • Wire Processing (AREA)

Description

Die Erfindung liegt auf dem Gebiet der Fertigungstechnik elektrischer Kabel und behandelt die SZ-Verseilung von Starkstrom-Kabeladern mit sektorförmigen Leiterquerschnitt unter besonderer Berücksichtigung der hierbei auftretenden mechanischen Kräfte.The invention is in the field of electrical cable manufacturing technology and deals with the SZ stranding of high-voltage cable cores with a sector-shaped conductor cross-section, with particular attention to the mechanical forces that occur.

Zur besseren Raumausnutzung des Kabelquerschnittes ist es bei mehradrigen Starkstromkabeln im Nieder- und unteren Mitteispannungsbereich (< 10 kV) üblich, Kabeladern mit sektorförmigem Leiterquerschnitt zu verwenden. Diese werden miteinander mit gleichbleibender Drallrichtung zur Kabelseele verseilt. Dabei können Sektoradern mit und ohne Vordrall verwendet werden. Sektoradern ohne Vordrall werden ohne Rückdrehung miteinander verseilt, wobei während des Verseilvorganges starke Torsionsbeanspruchungen auf die Sektoradern einwirken. Sektoradern mit Vordrall werden mit Rückdrehung miteinander verseilt ; hierbei sind die Torsionsbeanspruchungen relativ gering (« Kabel- und Leitungsfertigung », Kombinat VEB Kabelwerk Oberspree, VEB-Verlag Technik Berlin, 1976, Seite 200). Bei der Verseilung von Sektoradern ist es üblich, vor dem Verseilnippel eine Zwangsführung für jede Ader anzuordnen, um ihre für die Verseilung erforderliche räumliche Lage zu fixieren. Eine solche Zwangsführung kann aus mehreren geradlinig hintereinander angeordneten profilierten Rollen bestehen, zwischen denen die jeweilige Ader hindurchläuft (DE-A-22 11 111).To make better use of the cable cross-section, it is common for multi-core high-voltage cables in the low and lower medium-voltage range (<10 kV) to use cable cores with a sector-shaped conductor cross-section. These are stranded together with the same twist direction to form the cable core. Sector wires with and without pre-twist can be used. Sector cores without pre-twist are stranded together without reverse twist, whereby strong torsional stresses act on the sector cores during the stranding process. Sector wires with pre-twist are twisted together with reverse twist; here the torsional stresses are relatively low ("Cable and wire production", Kombinat VEB Kabelwerk Oberspree, VEB-Verlag Technik Berlin, 1976, page 200). When stranding sector cores, it is customary to arrange a positive guide for each core in front of the stranding nipple in order to fix the spatial position required for the stranding. Such positive guidance can consist of several profiled rollers arranged in a straight line one behind the other, between which the respective wire runs (DE-A-22 11 111).

Neben der üblichen Verseilung der Sektoradern mit gleichbleibender Drallrichtung ist auch eine Verseilart bekannt, bei der die Sektoradern mit in Abständen wechselnder Drallrichtung verseilt werden. Eine solche Verseilart hat in den letzter Jahren unter der Bezeichnung « SZ-Verseilung bei der Herstellung von Fernmeldekabein und Starkstromleitungen Eingang gefunden, doch sind die hierzu entwickelten SZ-Verseilmaschinen für die Verseilung von Sektoradern nicht ohne entsprechende Weiterentwicklung einsetzbar, da bei der Verseilung von Sektoradern wegen der großen Leiterquerschnitte (;a. 35 mm2) große mechanische Kräfte zu beherrschen sind.In addition to the usual stranding of the sector cores with a constant twist direction, a type of stranding is also known in which the sector cores are stranded with a twist direction that changes at intervals. Such a type of stranding has found its way into the past few years under the name "SZ stranding in the manufacture of telecommunication cabins and power lines, but the SZ stranding machines developed for this purpose cannot be used for stranding sector wires without appropriate further development, since stranding sector wires because of the large conductor cross-sections (a. 35 mm 2 ) large mechanical forces can be controlled.

Bei einer bekannten Einrichtung zur SZ-Verseilung von Sektoradern ohne Vordrall ist als eigentliches Verseilwerkzeug eine vor einem Verseilnippel angeordnete oszillierende Verseilscheibe vorgesehen, die mit Zwangsführungen für die Sektoradern gekoppelt ist. Zwischen dem Verseilnippel und der Abzug- und Aufwickelvorrichtung kann eine weitere Verdrehungsvorrichtung in Form eines Rollen- oder Bandabzuges angeordnet sein, die jeweils mit gegenläufiger Drehrichtung wie die oszillierende Verseilscheibe umläuft. Mit einer solchen Verseileinrichtung können naturgemäß nur ein bis zwei Verseilschläge je Verseilrichtung erzeugt werden (DE-A-2514 033).In a known device for SZ stranding of sector wires without pre-twist, an oscillating stranding disk arranged in front of a stranding nipple is provided as the actual stranding tool, which is coupled to positive guides for the sector wires. A further twisting device in the form of a roller or tape take-off can be arranged between the stranding nipple and the take-off and winding device, each rotating in the opposite direction of rotation as the oscillating stranding disk. With such a stranding device, naturally only one to two twist strands can be generated per stranding direction (DE-A-2514 033).

Weiterhin ist bereits vorgeschlagen worden, die vor dem Verseilnippel gerichteten Sektoradern mit einer zwischen einem ersten und einem zweiten Verseilnippel angeordneten Verseilvorrichtung zu verseilen, die mit abschnittsweise wechselnder Drehrichtung umläuft. Hierbei werden die Sektoradern im ersten Verseilnippel ein erstes Mal und im zweiten Verseilnippel ein zweites Mal gleichsinnig verseilt. Die Drehrichtung der Verseilvorrichtung, die aus einem oder zwei hintereinander angeordneten Spannzangenabzügen besteht, wird in Abständen geändert, die in bekannter Weise auf die Speicherkapazität der Einrichtung abgestimmt sind (DE-A-27 42 662).Furthermore, it has already been proposed to strand the sector wires directed in front of the stranding nipple with a stranding device which is arranged between a first and a second stranding nipple and which rotates with the direction of rotation changing in sections. Here, the sector wires are stranded in the same direction in the first stranding nipple for the first time and in the second stranding nipple for a second time. The direction of rotation of the stranding device, which consists of one or two collet deductions arranged one behind the other, is changed at intervals which are matched in a known manner to the storage capacity of the device (DE-A-27 42 662).

Weiterhin ist zur Verseilung von Adern für Nachrichtenkabel ein Verseilverfahren bekannt, bei dem die Verseilelemente mit Hilfe eines gestreckten Speichers wechselnder Drehbewegung verseilt werden. Der gestreckte Speicher besteht dabei aus zwei zwischen zwei Verseilnippeln angeordneten Verseilköpfen. Die Drehrichtung oder die Drehzahl der Verseilköpfe wird in Abständen gewechselt, die auf die Speicherlänge des gestreckten Speichers abgestimmt sind (FR-A-1 447 458, DE-A-22 30 972). Für derartige Verseilzwecke können auch Verseilköpfe eingesetzt werden, die nach Art eines Raupenabzuges ausgebildet sind (DE-A-17 90 249) oder aus einer vom Verseilgut einmal umschlungenen, tangential zur Verseilachse angeordneten Umlenkrolle bestehen (DE-A-17 65 452).Furthermore, a stranding method is known for stranding wires for communication cables, in which the stranding elements are stranded with the aid of an elongated memory with alternating rotary movement. The stretched memory consists of two stranding heads arranged between two stranding nipples. The direction of rotation or the speed of rotation of the stranding heads is changed at intervals that are matched to the length of the extended memory (FR-A-1 447 458, DE-A-22 30 972). For such stranding purposes it is also possible to use stranding heads which are designed in the manner of a caterpillar take-off (DE-A-17 90 249) or consist of a deflection roller which is once wrapped around by the stranded material and arranged tangentially to the stranding axis (DE-A-17 65 452).

Der Erfindung liegt die Aufgabe zugrunde, die bekannte Verseilvorrichtung zur SZ-Verseilung von nichtvordrallierten Starkstromkabeladern mit sektorförmigem Leiterquerschnitt (DE-A-2514033) in der Weise zu verbessern, daß eine größere Anzahl von Verseilschlägen in jeder Schlagrichtung aufgebracht werden kann und daß das Verseilgut im Bereich der Umkehrstellen der Drallrichtung eine genaue Verseilgeometrie aufweist und daß diese Umkehrstellen möglichst kurz ausgebildet sind.The invention has for its object to improve the known stranding device for SZ stranding of non-pre-twisted power cable cores with a sector-shaped conductor cross-section (DE-A-2514033) in such a way that a larger number of twist strands can be applied in each direction and that the stranded material in Area of the reversal points of the twist direction has a precise stranding geometry and that these reversal points are made as short as possible.

Die Erfindung geht demnach von einer Vorrichtung zum SZ-Verseilen von Starkstromkabeladern mit sektorförmigem Leiterquerschnitt aus, die aus raumfest angeordneten Adervorräten, aus einem Verseilnippel mit davor angeordneter Zwangsführung für jede Kabelader, aus einer hinter dem Verseilnippel angeordneten, mit wechselnder Drehbewegung umlaufenden Verdrehungsvorrichtung und aus einer Abzug- und Aufwickelvorrichtung besteht. Gemäß der Erfindung ist vorgesehen, daß die Zwangsführungen raumfest angeordnet sind, daß der Verdrehungsvorrichtung eine synchron mit dieser umlaufende und zu dieser mit Abstand angeordnete zweite Verdrehungsvorrichtung mit einem dahinter angeordneten zweiten Verseilnippel (Verseilpunkt) nachgeschaltet ist, dessen Abstand von dem letzten Angriffspunkt der zweiten Verdrehungsvorrichtung gleich oder annähernd gleich ist dem Abstand des ersten Verseilnippels von dem ersten Angriffspunkt der ersten Verdrehungsvorrichtung und daß der Abstand zwischen dem letzten Angriffspunkt jeder Zwangsführung an einer Kabelader und dem ersten Angriffspunkt der ersten Verdrehungsvorrichtung am Verseilgut kleiner oder höchstens gleich ist der durch die Abzugsgeschwindigkeit und die Drehzahl bzw. Drehzahlen der Verseilvorrichtung gegebenen Schlaglänge des Verseilgutes. Vorzugsweise ist dieser letztgenannte Abstand kleiner oder höchstens gleich der halben Schlaglänge des Verseilgutes.Accordingly, the invention is based on a device for SZ stranding of power cable cores with a sector-shaped conductor cross-section, which consists of fixedly arranged core supplies, a stranding nipple with positive guidance arranged in front of it for each cable core, a twisting device rotating behind the stranding nipple, rotating with rotating movement, and one Take-off and take-up device exists. According to the invention it is provided that the positive guides are arranged spatially fixed, that the twisting device is followed by a second twisting device rotating synchronously with it and spaced apart therefrom with a second twisting nipple (twisting point) arranged behind it, the distance from the last point of application of the second twisting device is equal to or approximately the same as the distance of the first stranding nipple from the first point of application of the first twist tion device and that the distance between the last point of application of each positive guidance on a cable core and the first point of application of the first twisting device on the stranded material is less than or equal to the lay length of the stranded material given by the take-off speed and the rotational speed or speeds of the stranding device. This latter distance is preferably less than or at most equal to half the lay length of the stranded material.

Mit einer derart ausgebildeten Vorrichtung werden die Sektoradern sowohl im Bereich des ersten Verseilnippels als auch im Bereich des zweiten Verseilnippels auf kurzem Wege wirksam miteinander verseilt, wobei die Längen der Torsionswechselstellen in den einzelnen Kabeladern auf die Länge der Drallwechselstellen der miteinander verseilten Kabeladern abgestimmt sind. In dieser Hinsicht geht die Erfindung unter anderem von der Überlegung aus, daß die zweite Verdrehung des Verseilverbandes im Bereich des zweiten Verseilnippels dann ohne Störung verläuft, wenn die erste Verdrehung im Bereich des ersten Verseilnippels zu einer genauen Verseilgeometrie geführt hat. Hierbei ist vorausgesetzt, daß die Änderung der Drehbewegung der Verseilköpfe genau auf den Abstand der beiden Verseilnippel und Verseilköpfe, also auf die Speicherlänge des von den Verseilnippeln und Verseilköpfen gebildeten gestreckten Speichers abgestimmt ist.With a device designed in this way, the sector wires are effectively stranded together in a short way both in the area of the first stranding nipple and in the area of the second stranding nipple, the lengths of the torsion change points in the individual cable wires being matched to the length of the twist change points of the cable wires stranded together. In this regard, the invention is based, inter alia, on the consideration that the second twist of the stranding assembly in the region of the second stranding nipple proceeds without disruption when the first twisting in the region of the first stranding nipple has led to a precise stranding geometry. The prerequisite here is that the change in the rotational movement of the stranding heads is precisely matched to the distance between the two stranding nipples and stranding heads, that is to say to the storage length of the elongated memory formed by the stranding nipples and stranding heads.

Eine möglichst genaue Verseilgeometrie der Kabeladern erhält man, wenn die Torsion der nicht rückgedrehten Kabeladern und die Bildung der Torsionswechselstellen sowie der Drallwechselstellen auf einer möglichst kurz gehaltenen Wegstrecke erfolgen und die hierzu erforderlichen Kräfte nicht nur an der äußeren Oberfläche der zu einem Strang zusammengefaßten Kabeladern, sondern auch an den einzelnen Kabeladern selbst, solange diese noch unverseilt sind, angreifen. Die möglichst kurz gehaltene Wegstrecke soll hierbei keinesfalls größer als eine Schlaglänge der verseilten Kabeladern sein. Mit Rücksicht auf die bei Sektorleiterkabeln üblichen Schlaglängen in der Größenordnung von etwa 150 cm bedeutet dies, daß der Abstand zwischen den Zwangsführungen und der Verseilvorrichtung möglichst 60 bis 100 cm beträgt.The most accurate stranding geometry of the cable cores can be obtained if the torsion of the non-twisted cable cores and the formation of the torsion change points as well as the twist change points take place as short as possible and the forces required for this not only on the outer surface of the cable cores combined into one strand, but also attack the individual cable cores themselves as long as they are not stranded. The path that is kept as short as possible should in no case be greater than a lay length of the stranded cable cores. In view of the lay lengths of around 150 cm customary in sector conductor cables, this means that the distance between the positive guides and the stranding device is as much as 60 to 100 cm.

Zur Optimierung der Abstandsverhältnisse je nach Art der zu verseilenden Sektoradern empfiehlt es sich, die Zwangsführungen und/oder die Verseilköpfe in ihrer örtlichen Lage gegenüber den Verseilnippeln unabhängig voneinander veränderbar bzw. einstellbar anzuordnen.To optimize the spacing depending on the type of sector wires to be stranded, it is advisable to arrange the positive guides and / or the stranding heads in their local position in relation to the stranding nipples so that they can be changed or adjusted independently of one another.

Zur Ausbildung einer sauberen Verseilgeometrie sollen weiterhin, wie bereits erwähnt, der erste rotierende Verseilkopf und die Zwangsführungen für die Kabeladern einander räumlich eng benachbart sein. In diesem Fall läuft der Kraftfluß vom rotierenden Verseilkopf über das Verseilgut zu den Zwangsführungen über räumlich relativ eng begrenzte Bahnen. Damit hier keine Aderbeschädigungen auftreten, müssen die einzelnen Maschinenelemente sorgfältig dimensioniert werden. Um die Zwangsführungen möglichst nahe am Verseilnippel anordnen zu können, empfiehlt sich daher eine Ausgestaltung in Form mehrerer profilierter Führungsrollen, die längs einer Wellenlinie jeweils auf der Innenseite der Wellenlinie angeordnet sind. Hierbei können einige der beidseitig der Wellenlinie angeordneten Führungsrollen einander paarweise oder auf Lücke gegenüberstehen, insbesondere in einem Bereich, in dem die Wellenlinie ihre Krümmung wechselt. Bei einer derartigen Ausgestaltung der Zwangsführung werden die bei der Abzugsbewegung der Kabeladern wirkenden Längskräfte in Querkräfte umgewandelt.To form a clean stranding geometry, the first rotating stranding head and the positive guides for the cable cores should, as already mentioned, be spatially closely adjacent to one another. In this case, the flow of force runs from the rotating stranding head over the stranded material to the positive guides over relatively narrow paths. The individual machine elements must be carefully dimensioned so that no wire damage occurs here. In order to be able to arrange the positive guides as close as possible to the stranding nipple, it is therefore advisable to design them in the form of a plurality of profiled guide rollers which are each arranged along a wavy line on the inside of the wavy line. Here, some of the guide rollers arranged on both sides of the wavy line can face each other in pairs or in a gap, in particular in an area in which the wavy line changes its curvature. With such a configuration of the positive guidance, the longitudinal forces acting during the withdrawal movement of the cable cores are converted into transverse forces.

Besonders große Kräfte von einer Zwangsführung aufgenommen werden, wenn diese aus zwei hintereinander angeordneten Umlenkscheiben besteht, auf denen die jeweilige Kabelader mit einem Umschlingungswinkel von wenigstens 90° aufliegt. Solche mit einer Profilrille versehenen Umlenkscheiben lassen eine besonders schonende Behandlung der sektorförmigen Kabeladern zu. Um hierbei eine zu große Wegstrecke zwischen der letzten Umlenkscheibe und dem Verseilnippel zu vermeiden, kann diese Wegstrecke durch eine oder mehrere profilierte Führungsrollen überbrückt werden ; diese Führungsrollen sind zweckmäßig längs einer gekrümmten Linie angeordnet, damit die jeweilige Kabelader durch Umwandlung von Längskräften in Querkräfte an diese Profilrollen angepreßt wird.Particularly large forces are absorbed by a positive guide if it consists of two deflection disks arranged one behind the other, on which the respective cable core rests with a wrap angle of at least 90 °. Such deflection disks provided with a profile groove allow particularly gentle treatment of the sector-shaped cable cores. In order to avoid a too large distance between the last deflection plate and the stranding nipple, this distance can be bridged by one or more profiled guide rollers; these guide rollers are expediently arranged along a curved line, so that the respective cable core is pressed against these profile rollers by converting longitudinal forces into transverse forces.

Die hinter bzw. vor den Verseilnippeln angeordneten Verseilköpfe müssen ebenfalls im Hinblick auf die Übertragung möglichst großer Kräfte sowie im Hinblick auf eine möglichst nahe Anordnung an den Verseilnippeln ausgestaltet sein. Geeignet hierfür sind Raupenbandanordnungen oder Spannbacken- bzw. Spannzangeneinrichtungen. Vorteilhaft im Hinblick auf eine schonende Behandlung des Verseilgutes ist auch die Verwendung eines Ein-Scheiben-Twisters, bei dem der Verseilkopf aus einer vom Verseilgut einmal umschlungenen, zur Verseilachse annähernd symmetrisch angeordneten Umlenkscheibe besteht. Da das Verseilgut in diesem Fall aus der Verseilachse ausgelenkt wird, können unter Ausnutzung der Hebelwirkung sehr große Drehkräfte auf das Verseilgut übertragen werden. Um den Angriffspunkt eines solchen Verseilkopfes möglichst nahe an den Verseilnippel zu verlegen, ist es dabei notwendig, der Umlenkscheibe zur Zu- und Abführung des Verseilgutes jeweils eine oder mehrere Führungsrollen zuzuordnen.The stranding heads arranged behind or in front of the stranding nipples must also be designed with regard to the transmission of the greatest possible forces and with regard to the arrangement as close as possible to the stranding nipples. Caterpillar belt arrangements or clamping jaw or collet devices are suitable for this. The use of a single-disk twister, in which the stranding head consists of a deflecting disc which is once wrapped around by the stranded material and is arranged approximately symmetrically with respect to the stranding axis, is also advantageous with regard to gentle handling of the stranded material. Since the stranded material is deflected from the stranding axis in this case, very large torsional forces can be transferred to the stranded material by using the leverage effect. In order to move the point of application of such a stranding head as close as possible to the stranding nipple, it is necessary to assign one or more guide rollers to each of the deflection sheaves for feeding and removing the stranded material.

Ausführungsbeispiele der neuen SZ-Verseilvorrichtung sind in den Figuren 1 bis 4 dargestellt.Exemplary embodiments of the new SZ stranding device are shown in FIGS. 1 to 4.

Die in den Figuren schematisch wiedergegebenen Vorrichtungen bestehen im wesentlichen aus Konstruktionselementen, wie sie dem Fachmann vertraut sind, wie Spule, Lochscheibe, Umlenkrolle, Zwangsführung, VerseilnippeI, Verseilkopf, Raupenband- oder Spannbackenabzug, Extruder, Wasserkühlstrecke, Abzug- und Aufwickeleinrichtung. Daher wird auf eine konstruktive Darstellung dieser Bauteile verzichtet. Die in Fig. 1 dargestellte Vorrichtung dient zur Verseilung von drei Starkstromkabeladern 2 zu einem Verseilverband 7. Die kunststoffisolierten Kabeladern 2 weisen eine sektorförmigen Leiterquerschnitt auf und sind nicht vordralliert. Sie laufen von raumfest angeordneten Adervorräten 1 ab und werden über Umlenkrollen 3 und Zwangsführungen 4 dem Verseilnippel 5 zugeführt.The devices shown schematically in the figures essentially consist of construction elements as are known to the person skilled in the art, such as a spool, perforated disc, deflection roller, positive guidance, stranding nipple, stranding head, caterpillar belt or clamping jaw take-off, extruder, water cooling section, take-off and winding device. Therefore, a con structural representation of these components omitted. The device shown in Fig. 1 is used for stranding three high-voltage cable wires 2 to form a stranding 7. The plastic-insulated cable wires 2 have a sector-shaped conductor cross section and are not pre-twisted. They run from fixedly arranged core stocks 1 and are fed to the stranding nipple 5 via deflection rollers 3 and positive guides 4.

Hinter dem Verseilnippel 5 und vor der Abzugeinrichtung 9, die einen Verseilpunkt bildet, ist je ein mit wechselnder Drehbewegung rotierender Verseilkopf 6 bzw. 8 angeordnet, der die im Verseilnippel 5 zusammengeführten Kabeladern von außen kraftschlüssig umfaßt und miteinander tordiert bzw. verseilt. Jeder Verseilkopf besteht aus einer Raupenbandanordnung oder aus einer Anordnung nach Art eines Spannbackenabzuges. Die Raupenbänder oder Spannbacken werden in Richtung der Verseilachse vom mit konstanter Abzugsgeschwindigkeit v durchlaufenden Verseilgut angetrieben, können aber auch von auBen angetrieben sein und das Verseilgut in Längsrichtung der Verseilachse bewegen. Die Drehbewegung, d.h. die Drehzahl oder die Drehrichtung, der Verseilköpfe 6 und 8 wird synchron in Abständen gewechselt, die in bekannter Weise auf die Laufzeit eines Längselementes des Verseilgutes vom ersten zum zweiten Verseilnippel bzw. vom ersten zum zweiten Verseilkopf abgestimmt sind. Hinter dem Verseilkopf 8 wird das Verseilgut von der Abzugeinrichtung 9 erfaßt und auf die Aufwickeleinrichtung 10 aufgewickelt.Behind the stranding nipple 5 and in front of the take-off device 9, which forms a stranding point, a stranding head 6 or 8 rotating with an alternating rotary movement is arranged, which non-positively embraces the cable wires brought together in the stranding nipple 5 from outside and twists or strands together. Each stranding head consists of a caterpillar belt arrangement or an arrangement in the manner of a clamping jaw trigger. The crawler belts or clamping jaws are driven in the direction of the stranding axis by the stranding material passing through at a constant take-off speed v, but can also be driven from the outside and move the stranding material in the longitudinal direction of the stranding axis. The rotational movement, i.e. the speed or the direction of rotation of the stranding heads 6 and 8 is changed synchronously at intervals which are matched in a known manner to the running time of a longitudinal element of the stranded material from the first to the second stranding nipple or from the first to the second stranding head. Behind the stranding head 8, the stranded material is picked up by the take-off device 9 and wound onto the winding device 10.

Im Bereich zwischen den Verseilköpfen 6 und 8 ist bei wechselnder Drehrichtung der Verseilköpfe mit einem Aufseilen der Umkehrstellen der Drallrichtung des Verseilgutes unter dem Einfluß von Zugspannungen nicht zu rechnen, da die Kabeladern 2 im Bereich der Umkehrstellen plastisch verformt sind und so für eine stabile Verseilgeometrie sorgen. Gegebenenfalls können aber zwischen den Verseilköpfen 6 und 8 besondere Führungselemente für das Verseilgut angeordnet sein. Im übrigen kann die Abzugeinrichtung 9 entfallen, wenn einer oder beide wechselnd rotierenden Verseilköpfe deren Funktion übernehmen. Als zweiter Verseilpunkt ist dann eine Umlenkscheibe oder ähnliches vorzusehen.In the area between the stranding heads 6 and 8, with changing direction of rotation of the stranding heads, the reversal points of the twisting direction of the stranded material cannot be expected to rope up under the influence of tensile stresses, since the cable wires 2 are plastically deformed in the region of the reversal points and thus ensure a stable stranding geometry . If necessary, however, special guide elements for the stranded material can be arranged between the stranding heads 6 and 8. In addition, the take-off device 9 can be omitted if one or both alternating rotating twisting heads take over their function. A deflection pulley or the like is then to be provided as the second stranding point.

Der wirksame Abstand des Verseilkopfes 6 vom Verseilnippel 5 ist mit b bezeichnet, der wirksame Abstand der Zwangsführungen 4 vom Verseilnippel 5 mit a. Die Summe der Abstände a und b und damit auch die Länge c zwischen dem .Verseilkopf 8 und dem vom Abzug 9 gebildeten Verseilpunkt soll kleiner als eine Schlaglänge des Vemeilgutes sein.The effective distance of the stranding head 6 from the stranding nipple 5 is denoted by b, the effective distance of the positive guides 4 from the stranding nipple 5 by a. The sum of the distances a and b and thus also the length c between the stranding head 8 and the stranding point formed by the trigger 9 should be less than a lay length of the material to be mixed.

Bei der in Fig. 1 dargestellten Vorrichtung bestehen die Zwangsführungen 4 aus paarweise gegenüberstehenden Rollengruppen, wobei die einzelnen Rollen profiliert und diese Profile genau an die Querschnittsform der Sektoradern 2 angepaBt sind. Durch die Profilierung und den Anpreßdruck zwischen den Rollengruppen wird verhindert, daß sich die Sektoradern 2 im Bereich der Zwangsführungen 4 drehen. Die Längsbewegung der Sektoradern wird nicht behindert.In the device shown in FIG. 1, the positive guides 4 consist of pairs of opposing roller groups, the individual rollers being profiled and these profiles being precisely adapted to the cross-sectional shape of the sector cores 2. The profiling and the contact pressure between the roller groups prevent the sector wires 2 from rotating in the area of the positive guides 4. The longitudinal movement of the sector veins is not hindered.

In Fig. 2 sind Zwangsführungen 11 dargestellt, die aus ebenfalls profilierten Umlenkrollen 12 bestehen. Diese Umlenkrollen sind jedoch auf einer Wellenlinie, insbesondere einer S-förmig geschwungenen Linie, angeordnet, so daß durch die hierbei erzielte Umlenkung der Kabeladern die infolge der Abzugsbewegung wirksamen Längskräfte in Querkräfte umgewandelt werden. Ein besonderes Anpressen der Profilrollen 12 an die Kabeladern ist daher nicht erforderlich. Im Bereich der Krümmungsänderung der Wellenlinie stehen sich Umlenkrollen paarweise oder auf Lücke gegenüber. Der Vorteil einer solchen Anordnung ist darin zu sehen, daß ein besonders kleiner Abstand zwischen der letzten Führungsrolle einer Zwangsführung 11 und dem Verseilnippel 5 erzielt werden kann.In Fig. 2 positive guides 11 are shown, which also consist of profiled deflection rollers 12. However, these deflecting rollers are arranged on a corrugated line, in particular an S-shaped curved line, so that the deflection of the cable cores which is achieved in this way converts the longitudinal forces effective as a result of the withdrawal movement into transverse forces. A special pressing of the profile rollers 12 on the cable cores is therefore not necessary. In the area of the change in curvature of the wavy line, deflecting rollers face each other in pairs or at a gap. The advantage of such an arrangement can be seen in the fact that a particularly small distance between the last guide roller of a positive guide 11 and the stranding nipple 5 can be achieved.

Fig. 3 zeigt eine Zwangsführung 13, die besonders große Kräfte aufnehmen kann. Hierzu sind jeweils zwei relativ große, profilierte Umlenkscheiben 14 und 15 vorgesehen, die hintereinander angeordnet sind und von einer Kabelader über einen Winkel von jeweils etwa 180° umschlungen sind. Die Wegstrecke zwischen dem Ablaufpunkt einer Kabelader auf der zweiten Umlenkscheibe 15 und dem Verseilnippel 5 wird zweckmäßig mit Hilfe einer oder mehrerer profilierter Führungsrollen 16 überbrückt. Es empfiehlt sich hierbei, die Führungsrolle 16 derart anzuordnen, daß die Kabelader auf dem Weg von der Umlenkscheibe 15 zum Verseilnippel 5 auf einer gekrümmten Linie geführt wird.Fig. 3 shows a positive guide 13, which can absorb particularly large forces. For this purpose, two relatively large, profiled deflection disks 14 and 15 are provided, which are arranged one behind the other and are encircled by a cable core over an angle of approximately 180 ° in each case. The distance between the outlet point of a cable core on the second deflection disk 15 and the stranding nipple 5 is expediently bridged using one or more profiled guide rollers 16. It is advisable to arrange the guide roller 16 in such a way that the cable core is guided on a curved line on the way from the deflection disk 15 to the stranding nipple 5.

Fig. 3 zeigt gleichzeitig eine vorteilhafte Ausgestaltung eines hinter dem Verseilnippel 5 angeordneten Verseilkopfes 17. Dieser ist nach Art eines Ein-Scheiben-Twisters aufgebaut und besteht aus der vom Verseilgut 7 einmal umschlungenen Umlenkscheibe 18, der jeweils zur Zu- und Abführung des Verseilgutes zwei Führungsrollen 19 zugeordnet sind. Ein solcher Verseilkopf benötigt zwar relativ große Querabmessungen je nach Durchmesser des Verseilgutes, mit Rücksicht auf die bei Kabeladern mit einem Leiterquerschnitt von beispielsweise 150 mm2 vorgesehene Schlaglänge von etwa 1,5 m ergeben sich jedoch bei einer Abzugsgeschwindigkeit von beispielsweise 40 bis 75 m/mn Drehzahlen des Verseilkopfes in der Größenordnung von 10 bis 60 U/mn. Die bei der Verseilung auftretenden Massenkräfte eines solchen Verseilkopfes sind jedoch wesentlich kleiner als im Falle einer konventionellen Verseilung mit umlaufenden Spulen.3 shows at the same time an advantageous embodiment of a stranding head 17 arranged behind the stranding nipple 5. This is constructed in the manner of a single-disc twister and consists of the deflecting disc 18, which is twisted around by the stranded material 7 and has two for feeding and discharging the stranded material Guide rollers 19 are assigned. Such a stranding head requires relatively large transverse dimensions depending on the diameter of the stranded material, but with regard to the lay length of approximately 1.5 m provided for cable cores with a conductor cross section of, for example, 150 mm 2 , this results at a take-off speed of, for example, 40 to 75 m / mn Speeds of the stranding head in the order of 10 to 60 U / mn. The inertial forces of such a stranding head that occur during stranding are, however, significantly smaller than in the case of conventional stranding with rotating coils.

Das Profil der Umlenkscheibe 18, die gegebenenfalls auch als Abzugscheibe ausgestaltet sein kann, wird leicht konisch ausgebildet. Vorzugsweise liegt der Schwerpunkt der Umlenkscheibe 18 etwas außerhalb der Verseilachse.The profile of the deflection disk 18, which can optionally also be designed as a pull-off disk, is slightly conical. The center of gravity of the deflection disk 18 is preferably somewhat outside the stranding axis.

Fig. 4 zeigt eine Vorrichtung, bei der die Verseilung der Kabeladern 2 zu einem Verseilverband 7 mit einem Extrusionsprozeß zum Aufbringen eines Kabelmantels verknüpft ist und mit der demnach aus Kabeladern 2 ein komplettes Kabel 25 hergestellt werden kann. Hierzu schließt sich an den Verseilteil, der im wesentlichen mit den in Fig. 1 und Fig. 3 dargestellten Einrichtungen übereinstimmt und die beiden Verseilköpfe 17 und 20 enthält, eine aus dem Extruder 23 und der Wasserkühlrinne 24 gebildete Extrusionslinie an, die parallel zur Verseilstrecke verläuft und der der Verseilverband 7 über die Umlenkscheiben 21 und 22 zugeführt wird. In Abwandlung dieses Ausführungsbeispiels besteht auch die Möglichkeit, die Verseilung der Kabeladern 2 mit der Extrusion der Aderisolierung zu verbinden, indem man von den Vorratstrommeln 1 Leiterseile ablaufen läßt, die unmittelbar anschließend mit Hilfe eines Extruders und einer Wasserkühlstrecke umhüllt werden, wie es in der Deutschen Patentanmeldung P 28 33 702. 2 beschrieben ist.Fig. 4 shows a device in which the stranding of the cable cores 2 to form a strand 7 with an extrusion process for application a cable jacket is linked and with which a complete cable 25 can thus be produced from cable cores 2. For this purpose, the stranding part, which essentially corresponds to the devices shown in FIGS. 1 and 3 and contains the two stranding heads 17 and 20, is followed by an extrusion line formed from the extruder 23 and the water cooling channel 24, which runs parallel to the stranding path and the stranding bandage 7 is fed via the deflection disks 21 and 22. In a modification of this embodiment, there is also the possibility of connecting the stranding of the cable cores 2 with the extrusion of the core insulation by allowing conductor ropes 1 to run off from the storage drums, which are then immediately enveloped with the aid of an extruder and a water cooling section, as is the case in the German Patent application P 28 33 702.2 is described.

Bei der SZ-Verseilung von Sektoradern mittels einer Verseileinrichtung, deren Verseilköpfe lediglich die Drehzahl, nicht aber die Drehbewegung wechseln, können Abzugsgeschwindigkeit und Drehzahlen so aufeinander abgestimmt sein, daß die Schlaglänge des Verseilgutes im Bereich der Verseileinrichtung beispielsweise abwechselnd + 66 cm und + 200 cm beträgt, so daß im fertigen Verseilgut eine Schlaglänge von ±100 cm vorliegt. Bei gleichbleibender Schlagrichtung innerhalb der Verseileinrichtung 'ist gewährleistet, daß von den Verseilköpfen große Querkräfte auf das Verseilgut übertragen werden können, ohne daß sich die Verseilelemente (Sektoradern) im Bereich der Drallwechselstellen in einer Ebene parallel legen.When SZ stranding of sector wires by means of a stranding device, the stranding heads of which only change the speed, but not the rotational movement, take-off speed and speeds can be coordinated so that the lay length of the stranded material in the area of the stranding device, for example, alternately + 66 cm and + 200 cm is so that there is a lay length of ± 100 cm in the finished stranded material. If the direction of lay remains the same within the stranding device, it is ensured that large transverse forces can be transferred from the stranding heads to the stranded material without the stranding elements (sector wires) lying parallel in one plane in the area of the twist change points.

Claims (8)

1. Apparatus for the SZ-stranding of heavy current cable wires having a sector-shaped conductor cross-section comprising stationary wire supplies (1), a stranding nipple (5) preceded by an automatic guide (4) for each cable wire, a rotating device (6) which is arranged behind the stranding nipple and which rotates with an alternating rotary movement, and discharge and reeling devices (9, 10), characterised in that the automatic guides (4) are fixed in position, that the rotating device (6) is followed by a second rotating device (8) which rotates in synchronism with the first device (6) and is spaced at a distance from the first device (6) and which is succeeded by a second stranding nipple (stranding point) (9), the distance of which from the last point of action of the second rotating device is equal or approximately equal to the distance of the first stranding nipple (6) from the first point of action of the first rotating device, and that the distance (a + b) between the last point of action of each automatic guide (4) on a cable wire and the first point of action of the first rotating device (6) on the stranded product is smaller than or at the most equal to the length of lay of the stranded goods which is determined by the discharge speed and the number or numbers of revolutions of the stranding device.
2. Apparatus as claimed in claim 1, characterised in that the distance (a + b) is smaller than or at most equal to half the length of lay of the stranded goods.
3. Apparatus as claimed in claim 1, or claim 2, characterised in that the distance (a) between each automatic guide (4) and the stranding point (5), and the distances (b, c) between the stranding points (5, 9) and the stranding devices (6, 8) can be adjusted independently of one another.
4. Apparatus as claimed in any one of claims 1 to 3, characterised in that each automatic guide (11) consists of a plurality of profiled guide rollers (12) which are arranged along a wavy line, in each case on the inner side of the curves of the wavy line.
5. Apparatus as claimed in claim 4, characterised in that some of the guide rollers (12) which are arranged on both sides of the wavy line face one another in pairs or at a gap.
6. Apparatus as claimed in any one of claims 1 to 3, characterised in that each automatic guide (13) consists of two deflecting discs (14, 15) on which the particular cable wire (2) is arranged with a clasping angle of at least 90°.
7. Apparatus as claimed in claim 6, characterised in that one or more profiled guide rollers (16) is or are arranged between the second deflecting disc (15) and the stranding nipple (5).
8. Apparatus as claimed in any one of the claims 1 to 7, characterised in that each rotating device (17, 20) consists of a deflecting disc (18) which is surrounded once by the stranded goods (7) and is arranged approximately symmetrically with respect to the stranding axis and which is assigned one or more guide rollers (19) for the supply and discharge of the stranded goods (7).
EP79102228A 1978-07-28 1979-07-02 Device for sz stranding power current cable cores with a sector-shaped conductor cross-section Expired EP0007473B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE2833704 1978-07-28
DE2833704 1978-07-28
DE2921092 1979-05-22
DE19792921092 DE2921092A1 (en) 1979-05-22 1979-05-22 Winding stranded cables for carrying high electric current - where initial, untwisted strands have sector-shaped cross=section, and cables have high transverse strength

Publications (2)

Publication Number Publication Date
EP0007473A1 EP0007473A1 (en) 1980-02-06
EP0007473B1 true EP0007473B1 (en) 1982-01-13

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EP79102228A Expired EP0007473B1 (en) 1978-07-28 1979-07-02 Device for sz stranding power current cable cores with a sector-shaped conductor cross-section

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US (1) US4272951A (en)
EP (1) EP0007473B1 (en)
DE (1) DE2961819D1 (en)

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DE2946248A1 (en) * 1979-11-16 1981-05-27 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover METHOD AND DEVICE FOR CONTINUOUS WIREING OF LARGER CROSS-SECTIONS FOR ELECTRICAL CABLES
DE3013933C2 (en) * 1980-04-09 1985-05-09 Siemens AG, 1000 Berlin und 8000 München Device for layer-by-layer SZ stranding of stranding elements of electrical cables
DE3149159A1 (en) * 1981-12-08 1983-07-21 Siemens AG, 1000 Berlin und 8000 München SZ CABLE DEVICE FOR SEALING ELEMENTS OF ELECTRICAL CABLES AND CABLES
DE3503254A1 (en) * 1984-04-12 1985-10-17 Siemens AG, 1000 Berlin und 8000 München TWO-STAGE CABLE DEVICE FOR MESSAGE CABLES
AT503805B1 (en) * 2006-10-23 2008-01-15 Rosendahl Masch Gmbh Production of sector-shaped cables with alternating direction of twist from individual wires comprises feeding them continuously as bundle which is anchored to prevent twisting upstream and alternately twisted and not twisted downstream
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EP3163586B1 (en) * 2015-10-28 2018-07-04 Schleuniger Holding AG Twisting device for electrical lines
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US3507108A (en) * 1965-03-01 1970-04-21 Fujikura Ltd Method of producing s-z alternating twists and the apparatus therefor
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Also Published As

Publication number Publication date
EP0007473A1 (en) 1980-02-06
US4272951A (en) 1981-06-16
DE2961819D1 (en) 1982-02-25

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