EP0025461B1 - Elément pour le transfert de forces de traction et son utilisation comme organe de suspension pour câbles conducteurs libres - Google Patents

Elément pour le transfert de forces de traction et son utilisation comme organe de suspension pour câbles conducteurs libres Download PDF

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Publication number
EP0025461B1
EP0025461B1 EP79104839A EP79104839A EP0025461B1 EP 0025461 B1 EP0025461 B1 EP 0025461B1 EP 79104839 A EP79104839 A EP 79104839A EP 79104839 A EP79104839 A EP 79104839A EP 0025461 B1 EP0025461 B1 EP 0025461B1
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EP
European Patent Office
Prior art keywords
fibres
element according
fibers
fiber bundle
clamping sleeve
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.)
Expired
Application number
EP79104839A
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German (de)
English (en)
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EP0025461A1 (fr
Inventor
Othmar Voser
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.)
Kupferdraht-Isolierwerk AG Wildegg
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Kupferdraht-Isolierwerk AG Wildegg
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Priority to AT79104839T priority Critical patent/ATE4734T1/de
Publication of EP0025461A1 publication Critical patent/EP0025461A1/fr
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Publication of EP0025461B1 publication Critical patent/EP0025461B1/fr
Expired legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/16—Ropes or cables with an enveloping sheathing or inlays of rubber or plastics
    • D07B1/162—Ropes or cables with an enveloping sheathing or inlays of rubber or plastics characterised by a plastic or rubber enveloping sheathing
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/02—Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics
    • D07B1/025—Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics comprising high modulus, or high tenacity, polymer filaments or fibres, e.g. liquid-crystal polymers
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B5/00—Making ropes or cables from special materials or of particular form
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/182—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring comprising synthetic filaments
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2205/00—Rope or cable materials
    • D07B2205/20—Organic high polymers
    • D07B2205/2046—Polyamides, e.g. nylons
    • D07B2205/205—Aramides
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2927—Rod, strand, filament or fiber including structurally defined particulate matter
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core
    • Y10T428/294—Coated or with bond, impregnation or core including metal or compound thereof [excluding glass, ceramic and asbestos]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core
    • Y10T428/294—Coated or with bond, impregnation or core including metal or compound thereof [excluding glass, ceramic and asbestos]
    • Y10T428/2942—Plural coatings
    • Y10T428/2947—Synthetic resin or polymer in plural coatings, each of different type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core
    • Y10T428/2964—Artificial fiber or filament
    • Y10T428/2967—Synthetic resin or polymer
    • Y10T428/2969—Polyamide, polyimide or polyester
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core
    • Y10T428/2971—Impregnation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2973—Particular cross section
    • Y10T428/2976—Longitudinally varying
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2973—Particular cross section
    • Y10T428/2978—Surface characteristic

Definitions

  • the invention relates to an element for transmitting tensile forces with a plurality of synthetic fibers having a smooth fiber surface of over 200 kg / mm 2 tensile strength and an elastic modulus of over 3000 kg / mm 2 and an elongation at break of less than 10%, which reduce the due to their smooth fiber surface, the risk of slipping at points of attack is impregnated with force-transmitting means transmitting the tensile forces at least in the area of these points of attack with a material connecting the fibers.
  • An element of this type is known, for example, from the information booklet "Keviar 49, Technical Information, Bulletin No. K-1, June 1974" of the Du Pont de Nemours Company, page 3, panel II and section B. It is a kind of rope, but the fibers forming the element are not stranded, but are arranged in parallel like strands and impregnated with an epoxy resin and the epoxy resin has been cured after the impregnation by heat treatment at approx. 180 ° C.
  • This known element which was only produced for experimental purposes - namely to measure the achievable tensile strength of such elements - is relatively stiff and is not suitable in this form as a "pull rope" because it breaks relatively easily at bending points.
  • the reason for this is that, like most other curable synthetic resins, epoxy resins break in the cured state even at relatively low bending stresses such as glass, and the notch effect that occurs at such break points then leads to the successive tearing of the fibers bridging the break point from the outside of the element leads to the inside.
  • the clamping sleeve would have to exert a pressure of several tons per square centimeter on the element or the fiber bundle with a length corresponding to the tenfold diameter of the fiber bundle, so that the tensile strength of the element can be fully utilized when the element is subjected to tensile loads can.
  • Such high pressures cannot be achieved with clamping sleeves, because even a sleeve made of duralumin with an extremely high wall thickness corresponding to half the inside diameter of the sleeve would already have reached its tensile strength limit at an internal pressure of five tons per square centimeter, i.e.
  • the tensile strength of an element with unimpregnated fibers is not determined by the tensile strength of the fibers, but by the maximum pressure that can be exerted on the fiber bundle by the force transmission means acting on the outside of the element and is generally far below the tensile strength of the fibers, often even only a fifth to a tenth of the same. This, however, negates the advantage of the high tensile strength that these synthetic fibers offer, because traction ropes with only one fifth or tenth of the tensile strength of these synthetic fibers can also be made from other materials, and with less technical effort and without the low coefficient of friction of the synthetic fibers caused difficulties.
  • the invention was therefore based on the object of creating an element of the type mentioned which can be used as a traction rope and which offers satisfactory solutions both to the problem of power transmission and to the problem of flexibility and thus opens up the possibility of producing a traction rope from the synthetic fibers mentioned which the tensile strength of the synthetic fibers can be fully utilized and which therefore allows the transmission of much higher tensile forces than a steel cable of the same effective cross-section.
  • this is achieved in the case of an element of the type mentioned at the outset in that the material with which the fibers are impregnated has a powder which disintegrates into a powder in the stress region when the pressure and / or bending stress exceeds the fracture limit of the material for the stress in question Material is.
  • this material completely excludes the occurrence of notch effects in places where the material breaks due to bending stresses of the element, because the material does not break like glass at such places , but especially in the pressure areas of the bend breaks into powder and thus the leverage ceases, which in the event of a break, as with glass, leads to the successive tearing of the fibers bridging the break point from the outside of the element to the inside.
  • the disintegration of the material into powder in areas of very high pressure stress is also of crucial importance for the power transmission in the end areas of the element, because as shown above using the example of a clamping sleeve as a power transmission means, an extraordinarily high pressure must be exerted on the fiber bundle in the power transmission areas are exercised so that said material disintegrates into powder in the power transmission areas. From a microscopic point of view, this powder consists of small crystals, mostly single crystals, which are dimensionally stable even at the highest pressures.
  • Said material in the present element is preferably a resin which disintegrates into powder when subjected to pressure and / or bending stress beyond its breaking limit.
  • Resins with this special property have hitherto only been found among the resins which consist entirely or at least predominantly of natural resin, but this does not exclude that a targeted development could possibly also lead to a synthetic resin which also has this special property.
  • such a disintegration into powder under the action of pressure must presuppose that a large number of subsequently growing single crystals are formed at the same time as the resin is being formed, which in turn requires the presence of crystal nuclei, while synthetic resins generally result from polymerization and thus a completely different one Have an educational smell.
  • rosin primarily has the property of disintegrating into powder under the action of pressure, to a particularly pronounced extent.
  • the material with which the synthetic fibers are impregnated consists of rosin.
  • the synthetic fibers suitably consist of plastic, preferably of an organic polymer.
  • the plastic from which the synthetic fibers are made, as described in the above information can be an aromatic polyamide, the fibers preferably having a tensile strength of at least 250 kg / mm 2 , an elastic modulus of at least 10,000 kg / mm 2 and have an elongation at break below 3%.
  • the synthetic fibers are preferably parallel to one another in a strand-like manner the arranged.
  • This has the advantage that undesirable expansion of the element is largely excluded and z. B. with horizontally tensioned elements, the resulting sag in temperature changes can be limited to a minimum.
  • this type of arrangement is also the most favorable for limit loads on the element that are close to the tensile strength limit of the synthetic fibers and, for a given diameter of the element or the fiber bundle, results in the highest effective cross-section or the highest number of fibers and thus the highest load capacity, and finally results in
  • This arrangement of the fibers in the present element in clamping elements such as clamping sleeves etc. also has the highest coefficient of static friction.
  • the relatively low elongation at break of the synthetic fibers is too low for the specific application of the element, then it is more advantageous if the synthetic fibers are stranded to increase the elasticity of the element.
  • two points at different distances from the fiber ends are expediently connected to one another by means of a clamping element in at least one of its two end regions, forming a loop, preferably around a round or thimble-shaped eyelet, and the impregnation of the fibers extends at least beyond that of away from the fiber ends.
  • the fibers of the present element are preferably impregnated with said material along their entire length.
  • the clamping members provided to form the loops at the ends of the present element expediently comprise at least one clamping sleeve, the edges of which are rounded at the exit points of the fibers.
  • the rounding of the sleeve edges at the exit points of the fibers has the advantage that the sleeve edges cannot cut into the fiber bundle. Because inside the sleeve, the cross section of the fiber bundle is somewhat smaller due to the high pressure of the sleeve on the fiber bundle than outside the sleeve, where the fiber bundle is not under pressure, and therefore the outer fibers of the fiber bundle at the point of exit of the fibers from the sleeve bent outwards around the sleeve edge.
  • the pressure of the clamping sleeve on the fiber bundle cannot be made high enough to be able to exclude with certainty that the end of the fiber bundle slips out of the clamping sleeve before the tensile strength of the fibers is reached, then the slipping out of the fiber bundle end can occur if a certain limit value is exceeded pulling force from the clamping sleeve onto the end of the fiber bundle can be reduced in that the end loop of the present element formed by means of the clamping sleeve is placed around a round eye with several turns.
  • the round eyelet can advantageously be combined with a thimble in such a way that the loop parts located between the clamping sleeve and the round eyelet are also guided through the thimble combined with the round eyelet.
  • the present element can advantageously be provided with a protective sheath, preferably made of polyurethane, for protecting against the effects of weather and other external influences.
  • a protective sheath preferably made of polyurethane, for protecting against the effects of weather and other external influences.
  • a protective sheath is of considerable advantage because in this case it additionally holds the fiber bundle together.
  • the fiber bundle is soaked over its entire length with the material in question, this material also holds it together, but at the bending points of the element, the cohesion of the fiber bundle is naturally lost due to the said material in that this material there in particular with frequent bending stress such as with a swinging rope it breaks down into powder.
  • the protective sheath then also holds the fiber bundle together at such points and, in addition, counteracts too strong bends of the element from the outset.
  • the protective sheath can also contribute to increasing the maximum tensile force that can be transmitted to the fiber bundle at a clamping point.
  • the material of the protective jacket is resistant enough to be able to withstand the forces transmitted from the crystals to the inner wall of the jacket even under the highest tensile loads on the element, which can be achieved easily by selecting the appropriate material for the protective jacket.
  • the invention further relates to a use of the present element as a support member for an overhead line cable, the element and the cable being surrounded by a common protective element connecting the element and the cable, which preferably has two mutually closed channels for the fibers of the element on the one hand and the Wires of the cable on the other hand.
  • the present element has decisive advantages over the steel cables previously used for the same purpose, because it has a higher tensile strength and less elongation than a steel cable of the same diameter, and because of the lower elongation, its sag is less than that of a steel cable and the risk of breakage at the rope suspensions due to the use of the present element both when using steel cables due to corrosion in the area of the clamping sleeves holding the end loops together and when using unimpregnated ropes from the synthetic fibers mentioned as a result of the fiber bundle ends slipping out of the clamping sleeves holding the end loops together is completely fixed.
  • synthetic fibers 3 made of aromatic polyamide, which are arranged parallel to one another in a strand-like manner, have a tensile strength of 300 kg / mm 2 , an elastic modulus of 13 400 kg / mm 2 , and an elongation at break of 2.6% and a specific weight of 1.45 g / cm 3 impregnated with rosin and surrounded by a protective jacket 4 made of polyurethane, which also encloses the wires 5 of the overhead line cable 1 and thus connects the cable 1 and the element 2 to one another.
  • a protective jacket 4 made of polyurethane
  • the protective jacket 4 forms two channels 6 and 7, which are closed off from one another, for the fibers 3 of the element 2 on the one hand and the wires 5 of the cable 1 on the other hand .
  • the part 8 of the protective jacket 4 forming the channel 6 and surrounding the synthetic fibers 3 is connected in one piece to the part 9 of the protective jacket 4 forming the channel 7 and surrounding the wires 5 by the bridge-like part 10 of the protective jacket 4.
  • this connecting bridge 10 between the element 2 and the cable 1 is cut open over a length which is at least sufficient to form loops, at the end 11 of the cut expediently a clamp or other cable and element not shown in FIG.
  • the fiber bundle consisting of the fibers 3 has 106 500 denier, which corresponds to an effective fiber cross section of 8.15 mm 2 .
  • the diameter of the fiber bundle formed by the fibers 3 is approximately 3.4 mm when the fibers are completely compressed.
  • the effective fiber cross section of 8.15 mm 2 and the tensile strength of the fibers of 300 kg / mm 2 result in a load limit or breaking limit of 2445 kg for the fiber bundle, however, multiple loads of element 2 with a tensile force of 2500 kg had neither Breakage of the element 2 or of the fiber bundle formed by the fibers 3 still results in the end 14 of the element 2 slipping out of the clamping sleeve 13.
  • the clamping sleeve 13 has a length of 75 mm and an outer diameter after the assembly press of about 8 mm and was pressed together with a force of 30 tons.
  • the part 8 of the protective jacket 4 surrounding the fibers 3 has a wall thickness of approx. 1 mm, which, however, has been reduced by at least half within the clamping sleeve 13.
  • the impregnation of the fiber bundle formed from the fibers 3 with rosin was achieved in that the fiber bundle was drawn through a bath of rosin dissolved in ether before the sheathing and then dried or cured at elevated temperature.
  • Precautions were taken to ensure that all the fibers of the fiber bundle were wetted by the rosin solution along their entire length in the bath and that excess solution of fibers was stripped off, for example by pulling the fiber bundle out of the bath through a calibration nozzle.
  • Alcohol was sometimes also used as a solvent for the rosin, but in this case the drying or hardening process takes a little longer than when using ether. It is also possible to pull the fiber bundle through a rosin melt, since the fibers can easily withstand temperatures above the rosin melting point, but in this case the uniform wetting of all fibers of the fiber bundle and also the stripping of the superfluous melt creates certain difficulties.
  • the fiber bundle slips out of the clamping sleeve as soon as the specific load on the element exceeds the specific load capacity given by the curve "natural resin impregnation" for the relevant clamping sleeve length.
  • the specific load on the element is the ratio of the tensile force acting on the loop held together by the clamping sleeve to the effective fiber cross section of the fiber bundle corresponding to the sum of the cross sections of all fibers of the fiber bundle.
  • the diagram shown in FIG. 3 applies to a pressure of the clamping sleeve on the fiber bundle of 18 kg / mm 2 which remains constant for all clamping sleeve lengths.
  • the values read from the curves increase in the ratio of the higher pressure value to 18 kg / mm 2 . If the pressure of the clamping sleeve on the fiber bundle is lower than 18 kg / mm 2 , the values that can be read from the curves decrease correspondingly in the ratio of the lower pressure value to 18 kg / mm 2 .
  • the average coefficients of friction between the clamping sleeve and the fiber bundle result from the diagram shown in FIG. 3 for 0.435 for natural resin impregnation, 0.28 for synthetic resin impregnation and 0.15 for unimpregnated fiber bundles.

Claims (13)

1. Elément pour transmission de forces de traction avec une pluralité de fibres synthétiques, présentant une surface de fibre lisse, d'une résistance à la rupture par traction supérieure à 200 kg/mm2 et d'un module d'élasticité situé au-dessus de 3000 kg/mm2 ainsi que d'un allongement relatif de rupture situé en dessous de 10%, lesquelles, pour la diminution du risque de glissement, conditionné par leur surface de fibre lisse, aux points d'application de moyens de transmission de force transmettant les forces de traction, sont imprégnées, au moins au voisinage de ces points d'application, avec une matière liant les fibres, caractérisé en ce que la matière, avec laquelle les fibres sont imprégnées, est une matière qui, lors d'une sollicitation de pression et/ou de flexion qui excède la limite de rupture de la matière pour la sollicitation concernée, se désagrège en poudre dans la zone de contrainte.
2. Elément selon la revendication 1, caractérisé en ce que la matière est une résine se désagrégeant en poudre lors d'une sollicitation de pression et/ou de flexion allant au-delà de sa limite de rupture.
3. Elément selon la revendication 2, caractérisé en ce que la résine consiste entièrement ou au moins en une proportion prépondérante en résine naturelle.
4. Elément selon la revendication 3, caractérisé en ce que la résine naturelle est de la colophane.
5. Elément selon l'une des revendications 1 à 4, caractérisé en ce que les fibres artificielles consistent en une matière synthétique, de préférence en un polymère organique.
6. Elément selon la revendication 5, caractérisé en ce que la matière synthétique est un polyamide aromatique et les fibres ont de préférence une résistance à la rupture par traction d'au moins 250 kg/mm2, un module d'élasticité d'au moins 10 000 kg/mm2 et un allongement de rupture inférieur à 3%.
7. Elément selon l'une des revendications 1 à 6, caractérisé en ce que les fibres synthétiques sont disposées en écheveau parallèlement les unes aux autres.
8. Elément selon l'une des revendications 1 à 6, caractérisé en ce que les fibres synthétiques sont toronnées.
9. Elément selon l'une des revendications 1 à 8, caractérisé en ce que, dans au moins l'une de ses deux zones extrêmes, deux emplacements, différemment éloignés des extrémités de fibres, sont reliés entre eux au moyen d'un organe de.serrage avec formation d'une boucle placée de préférence autour d'un oeillet rond ou en forme de cosse et l'imprégnation des fibres s'étend au moins au-delà de l'emplacement plus éloigné des extrémités de fibres.
10. Elément selon la revendication 9, caractérisé en ce que l'organe de serrage comprend au moins une douille de serrage dont les bords sont arrondis aux emplacements de sortie des fibres.
11. Elément selon la revendication 9 ou 10, caractérisé en ce que la boucle est placée suivant plusieurs spires autour d'un oeillet rond.
12. Elément selon l'une des revendications 1 à 11, caractérisé en ce que, pour la protection contre les intempéries et d'autres actions extérieures, il est pourvu d'une enveloppe de protection, de préférence en polyuréthane, entourant les fibres.
13. Utilisation d'un élément selon l'une des revendications 1 à 12 comme organe porteur pour un câble de ligne aérienne, caractérisée en ce que l'élément et le câble sont entourés par une enveloppe de protection commune reliant l'élément et le câble entre eux, laquelle forme de préférence deux conduits, fermés l'un par rapport à l'autre, pour les fibres de l'élément d'une part et pour les fils métalliques du câble d'autre part.
EP79104839A 1979-09-18 1979-12-03 Elément pour le transfert de forces de traction et son utilisation comme organe de suspension pour câbles conducteurs libres Expired EP0025461B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79104839T ATE4734T1 (de) 1979-09-18 1979-12-03 Element zur uebertragung von zugkraeften und verwendung desselben als tragorgan fuer freileitungskabel.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH844479 1979-09-18
CH8444/79 1979-09-18

Publications (2)

Publication Number Publication Date
EP0025461A1 EP0025461A1 (fr) 1981-03-25
EP0025461B1 true EP0025461B1 (fr) 1983-09-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP79104839A Expired EP0025461B1 (fr) 1979-09-18 1979-12-03 Elément pour le transfert de forces de traction et son utilisation comme organe de suspension pour câbles conducteurs libres

Country Status (7)

Country Link
US (2) US4438293A (fr)
EP (1) EP0025461B1 (fr)
AT (1) ATE4734T1 (fr)
CA (1) CA1134598A (fr)
DE (1) DE2966209D1 (fr)
FI (1) FI67927C (fr)
NO (1) NO802758L (fr)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4508317A (en) * 1982-02-05 1985-04-02 Conti Allen C Tape and method for measuring and/or pulling cable
US4763983A (en) * 1986-12-31 1988-08-16 Sumitomo Electric Research Triangle, Inc. Optical transmission cable with messenger
US5043037A (en) * 1989-11-22 1991-08-27 Sumitomo Electric Fiber Optics Corporation Method for making high strain aerial fiber optic cable
US5209439A (en) * 1992-03-11 1993-05-11 Diamond Communication Products, Inc. Drop wire clamp
US6015953A (en) * 1994-03-11 2000-01-18 Tohoku Electric Power Co., Inc. Tension clamp for stranded conductor
US5678609A (en) * 1995-03-06 1997-10-21 Arnco Corporation Aerial duct with ribbed liner
PT876093E (pt) * 1996-01-25 2004-01-30 Ppi Corp Pty Ltd Um tubo com componente de fio que permite tensao longitudinal
DE19625697A1 (de) * 1996-04-22 1998-01-08 Helmut Luethy Beschichtungsmittel für Schläger mit Saitenbespannung
US6648279B1 (en) 2000-11-28 2003-11-18 Allied Bolt, Inc. Drop wire clamp and method for securing drop wire
FI119234B (fi) * 2002-01-09 2008-09-15 Kone Corp Hissi
MY136077A (en) * 2002-11-05 2008-08-29 Inventio Ag Drive-capable support or traction means and method for production thereof
DE60210994T2 (de) * 2002-12-13 2006-12-28 S.I.C. Milano S.R.L. Seilanker und Herstellungsverfahren
WO2006130917A1 (fr) * 2005-06-09 2006-12-14 Donald Butler Curchod Systeme de connexion haute charge ameliore
IL171198A (en) * 2005-09-29 2009-08-03 Shiltex Ltd Complex cable
US8203074B2 (en) * 2006-10-25 2012-06-19 Advanced Technology Holdings Ltd. Messenger supported overhead cable for electrical transmission
US9056656B2 (en) 2008-07-18 2015-06-16 Thomas W. Fields Mooring loop
US8932435B2 (en) 2011-08-12 2015-01-13 Harris Corporation Hydrocarbon resource processing device including radio frequency applicator and related methods
US8960285B2 (en) 2011-11-01 2015-02-24 Harris Corporation Method of processing a hydrocarbon resource including supplying RF energy using an extended well portion
WO2013163094A1 (fr) * 2012-04-24 2013-10-31 Fields Thomas W Boucle d'amarrage
CN107317295B (zh) * 2017-08-29 2022-10-04 徐州海伦哲专用车辆股份有限公司 一种电源车主馈出电缆终端接头护套
EP4081579A4 (fr) * 2020-03-13 2024-01-24 Galactic Co Llc Câbles de commande et câbles de stabilisation composites pour applications d'aéronef et leur procédé de fabrication
US11597476B2 (en) 2020-08-25 2023-03-07 Thomas W. Fields Controlled failure point for a rope or mooring loop and method of use thereof

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB454240A (en) * 1935-03-25 1936-09-25 Ici Ltd Improvements in the treatment of cellulosic textile fabrics
US2331840A (en) * 1940-10-12 1943-10-12 Hercules Powder Co Ltd Textile fiber and method of producing
US2348552A (en) * 1941-03-27 1944-05-09 Hercules Powder Co Ltd Textile fiber and method of producing
US2561487A (en) * 1948-07-15 1951-07-24 Bailhe George Cable mooring pennant
US2775860A (en) * 1951-03-28 1957-01-01 Owens Corning Fiberglass Corp Twine
US2819988A (en) * 1955-06-02 1958-01-14 American Viscose Corp Regenerated cellulose cordage
NO117374B (fr) * 1965-04-27 1969-08-04 Standard Tel Kabelfab As
US3498038A (en) * 1966-07-11 1970-03-03 Owens Corning Fiberglass Corp Tensile members,apparatus and method for production
FR2276419A2 (fr) * 1973-08-01 1976-01-23 Europ France Cordes Procede et installation de fabrication de cordes ainsi realisees
US3911785A (en) * 1974-01-18 1975-10-14 Wall Ind Inc Parallel yarn rope
DE2433099C3 (de) * 1974-07-10 1979-08-16 Felten & Guilleaume Carlswerk Ag, 5000 Koeln Elektrisches Kabel mit zugaufnehmenden Elementen aus hochfesten Kunststoffäden
US3973385A (en) * 1975-05-05 1976-08-10 Consolidated Products Corporation Electromechanical cable
CA1024228A (fr) * 1975-07-11 1978-01-10 Friedrich K. Levacher Cables electriques avec gaine resistant a la tension mecanique
US4095404A (en) * 1975-10-09 1978-06-20 Hitco Method of manufacturing a high-strength, polyurethane-impregnated polyamide cable
SE414979B (sv) * 1977-07-26 1980-08-25 Ericsson Telefon Ab L M Sjelvflytande kabel med stor bojbarhet
US4202164A (en) * 1978-11-06 1980-05-13 Amsted Industries Incorporated Lubricated plastic impregnated aramid fiber rope

Also Published As

Publication number Publication date
US4438293A (en) 1984-03-20
DE2966209D1 (en) 1983-10-27
FI802909A (fi) 1981-03-19
EP0025461A1 (fr) 1981-03-25
US4650715A (en) 1987-03-17
NO802758L (no) 1981-03-19
CA1134598A (fr) 1982-11-02
FI67927B (fi) 1985-02-28
ATE4734T1 (de) 1983-10-15
FI67927C (fi) 1985-06-10

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