EP0528083A1 - Verfahren zur Herstellung einer Verseileinheit mit abschnittsweise wechselnder Drallrichtung - Google Patents

Verfahren zur Herstellung einer Verseileinheit mit abschnittsweise wechselnder Drallrichtung Download PDF

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Publication number
EP0528083A1
EP0528083A1 EP91307549A EP91307549A EP0528083A1 EP 0528083 A1 EP0528083 A1 EP 0528083A1 EP 91307549 A EP91307549 A EP 91307549A EP 91307549 A EP91307549 A EP 91307549A EP 0528083 A1 EP0528083 A1 EP 0528083A1
Authority
EP
European Patent Office
Prior art keywords
assembly
elements
flexible elongate
elongate elements
wavy
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP91307549A
Other languages
English (en)
French (fr)
Other versions
EP0528083B1 (de
Inventor
Cyril Henry Gosling
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Balfour Beatty PLC
Original Assignee
BICC PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BICC PLC filed Critical BICC PLC
Priority to DE69106357T priority Critical patent/DE69106357T2/de
Priority to AT91307549T priority patent/ATE116391T1/de
Priority to EP91307549A priority patent/EP0528083B1/de
Publication of EP0528083A1 publication Critical patent/EP0528083A1/de
Application granted granted Critical
Publication of EP0528083B1 publication Critical patent/EP0528083B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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

Definitions

  • This invention relates to the manufacture of a stranded assembly of separately formed flexible elongate elements in which the direction of lay of the elements along the length of the assembly is reversed at regular intervals.
  • a stranded assembly of separately formed flexible elongate elements such as a multi-core electric power or communication cable, multi-core optical cable, an overhead electric conductor and a steel hawser
  • a stranded assembly comprises two or more layers of such helically wound elongate elements
  • the direction of lay of the elements of adjacent layers it is also common practice for the direction of lay of the elements of adjacent layers to be of opposite hand.
  • the regular intervals between the positions at which the direction of lay of the flexible elongate elements is reversed are each no greater in length than a single turn of an element, thereby providing ample spare length of elements at positions along the stranded assembly where T-joints are to be made and producing a stranded assembly more likely to be capable of withstanding subsidence and the like.
  • the improved method comprises causing a plurality of separately formed flexible elongate elements to advance side-by-side in the direction of their lengths with their axes in a substantially common plane and to follow substantially regular wavy paths in said plane so as to form a substantially flat assembly of flexible elongate elements in which adjacent elements are in substantially continuous contact and follow said wavy paths; and transversely folding said advancing wavy flat assembly about a longitudinal axis substantially parallel to the direction of advance of the assembly to form a stranded assembly of flexible elongate elements in which the direction of lay of the elements is reversed at regular intervals along the length of the assembly, the amplitude of the waves of said wavy flat assembly having regard to the cross-sectional size of the flat assembly being such that, when the wavy flat assembly is transversely folded about said longitudinal axis, the regular intervals at which the direction of lay of the elements is reversed are each no greater in length than a single turn of an element.
  • the amplitude of the waves of the wavy flat assembly of flexible elongate elements having regard to the cross-sectional size of the flat assembly is so selected that, when the wavy flat assembly is transversely folded about said longitudinal axis, the regular intervals at which the direction of lay of the elements is reversed are each substantially equal to a single turn of an element or are each substantially equal to one half of a single turn of an element.
  • the advancing separately formed flexible elongate elements may be caused to follow said substantially regular wavy paths in said common plane by any convenient means but, preferably, whilst advancing between two longitudinally spaced pairs of rotatably driven rollers or endless belts, the advancing elements are caused to move transversely from side to side to a predetermined extent, e.g. by causing the pairs of rotatably driven rollers or endless belts to move to and fro in a rectilinear direction substantially normal to the direction of advance of the flexible elongate elements.
  • adjacent flexible elongate elements may be secured in continuous line contact, e.g. by extruding a thin layer of plastics material overall so that adjacent elements are joined by a web of plastics material.
  • Transverse folding of the advancing wavy flat assembly of flexible elongate elements about said longitudinal axis may be effected in any convenient manner, for example, by causing the flat assembly to pass through a rolling mill comprising a plurality of pairs of shaping rolls or appropriately disposed pairs of endless belts, through a plurality of forming dies or through a single former having a bore of a shape approximating to a frustum of a cone.
  • At least one elongate member of high tensile strength - hereinafter, for convenience, referred to as a tensile-resistant elongate member - may be assembled with the stranded assembly.
  • the tensile-resistant elongate member may be at least one tensile-resistant elongate element which is caused to travel in the direction of its length and around which the wavy flat assembly of flexible elongate elements is transversely folded, or one or more than one longitudinally extending tensile-resistant elongate member, e.g. a tape of tensile-resistant material, may be assembled with the plurality of separately formed flexible elongate elements.
  • the tensile-resistant member may comprise a sheath of tensile-resistant material which surrounds the stranded assembly of flexible elongate elements and which is formed by extrusion or by helically winding a plurality of interlocking elongate elements of tensile-resistant material around the stranded assembly.
  • a combination of at least one central tensile-resistant element and a sheath of tensile-resistant material may be employed.
  • the wavy flat assembly of flexible elongate elements may be transversely folded around at least one stranded assembly of flexible elongate elements which has been manufactured by the improved method hereinbefore described and which is advancing in the direction of its length.
  • Two or more stranded assemblies of flexible elongate elements may be laid-up or otherwise assembled together to form a multi-assembly product.
  • the separately formed flexible elongate elements of the or each wavy flat assembly are of the same cross-sectional shape and size as one another.
  • Separately formed flexible elongate elements that may be assembled using the improved method of the present invention include bare wires or assemblies of two or more bare wires, insulated electrical conductors which may be a single wire or a plurality of wires, optical cables or optical fibre elements comprising at least one optical fibre and pipes or tubes of metal or metal alloy or of rubber or plastics material.
  • the invention also includes a stranded assembly of separately formed flexible elongate elements in which the direction of lay of the elements is reversed along the length of the assembly at regular intervals no greater in length than a single turn of an element, which stranded assembly has been manufactured by the improved method hereinbefore described.
  • four electric cable cores 1 each consisting of a multi-wire electric conductor having an overall extruded layer of electrically insulating material, are drawn side by side in the direction of their lengths with their axes in a common plane through two longitudinally spaced pairs 2 of rotatably driven rollers. Whilst travelling between the pairs 2 of rotatably driven rollers, the advancing cable cores 1 are caused to move transversely from side to side in said plane so as to form a flat assembly 3 of cable cores in which adjacent cores 1 are in continuous contact and follow wavy paths.
  • the amplitude of the waves of the wavy flat assembly 3 having regard to the cross-sectional size of the flat assembly is such that, when the wavy flat assembly is transversely folded about a longitudinal axis extending parallel to its direction of travel, the direction of lay of the cable cores 1 of the transversely folded assembly will be reversed at regular intervals each substantially equal to a single turn of a cable core around the folded assembly.
  • the advancing wavy flat assembly 3 of cable cores passes through a plurality of longitudinally spaced pairs of rollers 4 which transversely fold the advancing wavy flat assembly about said longitudinal axis to form a stranded assembly 5 of cable cores 1 in which the direction of lay of the cores is reversed at regular intervals each equal to a single turn of a core around the stranded assembly.
  • the advancing wavy flat assembly 3 of cable cores emerging from the last of the pairs of rotatably driven rollers 2 may be transversely folded around a tensile-resistant elongate element which is caused to travel in the direction of its length so that the stranded assembly of cable cores has a central tensile-resistant element within the stranded assembly.
  • a sheath of tensile-resistant material may be formed by extrusion or by helically winding a plurality of interlocking elongate elements of tensile-resistant material around the stranded assembly.

Landscapes

  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Ropes Or Cables (AREA)
EP91307549A 1991-08-15 1991-08-15 Verfahren zur Herstellung einer Verseileinheit mit abschnittsweise wechselnder Drallrichtung Expired - Lifetime EP0528083B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE69106357T DE69106357T2 (de) 1991-08-15 1991-08-15 Verfahren zur Herstellung einer Verseileinheit mit abschnittsweise wechselnder Drallrichtung.
AT91307549T ATE116391T1 (de) 1991-08-15 1991-08-15 Verfahren zur herstellung einer verseileinheit mit abschnittsweise wechselnder drallrichtung.
EP91307549A EP0528083B1 (de) 1991-08-15 1991-08-15 Verfahren zur Herstellung einer Verseileinheit mit abschnittsweise wechselnder Drallrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91307549A EP0528083B1 (de) 1991-08-15 1991-08-15 Verfahren zur Herstellung einer Verseileinheit mit abschnittsweise wechselnder Drallrichtung

Publications (2)

Publication Number Publication Date
EP0528083A1 true EP0528083A1 (de) 1993-02-24
EP0528083B1 EP0528083B1 (de) 1994-12-28

Family

ID=8208376

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91307549A Expired - Lifetime EP0528083B1 (de) 1991-08-15 1991-08-15 Verfahren zur Herstellung einer Verseileinheit mit abschnittsweise wechselnder Drallrichtung

Country Status (3)

Country Link
EP (1) EP0528083B1 (de)
AT (1) ATE116391T1 (de)
DE (1) DE69106357T2 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994028232A1 (en) * 1993-05-22 1994-12-08 Bicc Public Limited Company Manufacture of a reversed lay stranded assembly
WO1996015311A1 (en) * 1994-11-15 1996-05-23 Cyril Henry Gosling Manufacture of a reversed lay stranded assembly

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4577403A (en) * 1985-05-29 1986-03-25 Northern Telecom Limited Manufacture of telecommunications cable core units

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4577403A (en) * 1985-05-29 1986-03-25 Northern Telecom Limited Manufacture of telecommunications cable core units

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994028232A1 (en) * 1993-05-22 1994-12-08 Bicc Public Limited Company Manufacture of a reversed lay stranded assembly
WO1996015311A1 (en) * 1994-11-15 1996-05-23 Cyril Henry Gosling Manufacture of a reversed lay stranded assembly

Also Published As

Publication number Publication date
DE69106357T2 (de) 1995-05-04
ATE116391T1 (de) 1995-01-15
DE69106357D1 (de) 1995-02-09
EP0528083B1 (de) 1994-12-28

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