EP0025461A1 - 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
EP0025461A1
EP0025461A1 EP79104839A EP79104839A EP0025461A1 EP 0025461 A1 EP0025461 A1 EP 0025461A1 EP 79104839 A EP79104839 A EP 79104839A EP 79104839 A EP79104839 A EP 79104839A EP 0025461 A1 EP0025461 A1 EP 0025461A1
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EP
European Patent Office
Prior art keywords
fibers
element according
fiber bundle
tensile strength
ropes
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
EP79104839A
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German (de)
English (en)
Other versions
EP0025461B1 (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
Kupferdraht Isolierwerk AG
Original Assignee
Kupferdraht-Isolierwerk AG Wildegg
Kupferdraht Isolierwerk AG
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 Kupferdraht-Isolierwerk AG Wildegg, Kupferdraht Isolierwerk AG filed Critical Kupferdraht-Isolierwerk AG Wildegg
Priority to AT79104839T priority Critical patent/ATE4734T1/de
Publication of EP0025461A1 publication Critical patent/EP0025461A1/fr
Application granted granted Critical
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 of power transmission means are soaked at least over part of their total length with a material connecting the fibers and increasing the coefficient of friction on the outer surface of the fiber composite.
  • An element of this type is known, for example, from the information leaflet "Kevlar 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 parallel to each other in a strand-like manner and soaked with an epoxy resin, and the epoxy resin has been cured by the heat treatment at about 180 ° C.
  • This known element which was only produced for experimental purposes - namely to measure the achievable tensile strength of solo 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.
  • 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 ten times the diameter of the fiber bundle , so with tensile loads the tensile strength of the element can be fully exploited.
  • 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 invention was therefore based on the object of using an element of the type mentioned which can be used as a traction rope create, which offers satisfactory solutions both for the problem of power transmission and for the flexibility problem and thus opens up the possibility of producing a traction rope from the synthetic fibers mentioned, in which the tensile strength of the synthetic fibers can be fully utilized and which therefore means that the tensile forces are significantly higher than a steel cable of the same effective cross-section is permitted.
  • 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 breakage like glass leads to the successive tearing of the fibers bridging the breakage from the outside of the element inwards.
  • the second is the disintegration of the material into powder in areas 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, so that the material in question is applied in the power transmission areas Powder disintegrates. 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, which, however, does not exclude that a targeted development could 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 during the formation of the resin, which in turn necessitates the presence of crystal nuclei, while synthetic resins generally arise from polymerization and thus a completely different one Have educational mechanism.
  • 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 can be particularly advantageously an aromatic polyamide, as described in the above-mentioned information, 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 an elongation at break have less than 3%.
  • the synthetic fibers are preferably arranged parallel to one another in a strand-like manner.
  • This has the advantage that undesirable expansion of the element is largely excluded and, for example in the case of horizontally tensioned elements, the sag resulting from temperature changes can be kept 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, gives 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 any case in the present element in clamping members such as Clamping sleeves etc. also 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 in at least one of its two end regions, with the formation of a loop, which is preferably placed around a round or thimble eyelet, by means of a clamping member, and the impregnation of the fibers extends at least beyond that of the Fiber ends further away.
  • 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 than outside the sleeve due to the high pressure of the sleeve on the fiber bundle, where the fiber bundle is not under pressure stands, and therefore the outer fibers of the fiber bundle are bent outwards at the point of exit of the fibers from the sleeve 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, If the fiber bundle end slips out of the clamping sleeve and the tensile force on the fiber bundle end is exceeded according to a certain limit value, the end loop of the present element, formed by means of the clamping sleeve, is wrapped around a round eyelet with several windings the element acting tensile force are transmitted directly to the round eye, so that the effective tensile force on the clamping sleeve is reduced accordingly.
  • 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, which surrounds the fibers.
  • a protective sheath is of considerable advantage because in this case it additionally holds the fiber bundle together.
  • the fiber bundle is soaked along its entire length with the said material, it is also held together by this material, but at the bending points of the element, the cohesion of the fiber bundle naturally goes through the said material lost that this material disintegrates into powder there, especially when subjected to frequent bending loads, such as with a swinging rope.
  • 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, but this can easily be achieved by suitable selection of the material used 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 forms.
  • the present element has decisive advantages over the steel cables previously used for the same purpose, because it has a higher tensile strength and a lower elongation than a steel cable of the same diameter, and because of the lower elongation, its sagging is less than that of a steel cable and the hitherto given risk of breakage on the cable hangers 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 sliding out of the clamping sleeves holding the end loops together conditions is completely eliminated by using the present element.
  • strands are arranged in parallel to one another 3 from aromatic polyamide with a tensile strength of 300 kg / mm 2 , a modulus of elasticity of 13400 kg / mm 2 , an elongation at break of 2.6% and a specific weight of 1.45 g / cm 3 impregnated with rosin and a protective jacket 4 surrounded by polyurethane, which also surrounds the wires 5 of the overhead line cable 1 and thus connects the cable 1 and the element 2 with each other.
  • aromatic polyamide with a tensile strength of 300 kg / mm 2 , a modulus of elasticity of 13400 kg / mm 2 , an elongation at break of 2.6% and a specific weight of 1.45 g / cm 3 impregnated with rosin and a protective jacket 4 surrounded by polyurethane, which also surrounds the wires 5 of the overhead line cable 1 and thus connects the cable 1 and the element 2 with each other.
  • 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 106500 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 compression 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 obtained by pulling the fiber bundle through a bath of rosin dissolved in ether before the sheathing and then drying or curing it at elevated temperature, taking precautions to ensure that all the fibers of the fiber bundle were in their entirety in the bath Rosin solution and that unnecessary solution of fibers was stripped off, for example by pulling the fiber bundle out of the bath through a calibration nozzle.
  • Alcohol was also sometimes used as a solvent for the rosin, but in this case the drying or curing process takes a little longer than when using ether.
  • the fiber bundle slips out of the clamping sleeve as soon as the specific load on the element caused by the curve "natural resin impregnation" for the clamping concerned sleeve length exceeds the specified load capacity.
  • 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 the fibers of the fiber bundle.
  • this effect means that when the fiber bundle and full use of the tensile strength of the fiber bundle is not possible if the fiber bundle is not impregnated, because the fiber bundle slips out of the clamping sleeve before the tensile strength or the breaking point of the fibers is reached as the element becomes more stressed.
  • the diagram shown in FIG. 3 applies to a pressure of the clamping sleeve on the fiber bundle of 18 kg / mm 2 that remains the same 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 coefficient of friction between the clamping sleeve and the fiber bundle results from the diagram shown in FIG. 0.435 for natural resin impregnation, 0.28 for synthetic resin impregnation and 0.15 for unimpregnated fiber bundles.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Ropes Or Cables (AREA)
  • Reinforced Plastic Materials (AREA)
  • Communication Cables (AREA)
  • Insulated Conductors (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
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 true EP0025461A1 (fr) 1981-03-25
EP0025461B1 EP0025461B1 (fr) 1983-09-21

Family

ID=4340447

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)

Cited By (2)

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WO1997040228A1 (fr) * 1996-04-22 1997-10-30 Luethy Helmut Agent de revetement pour raquette a tension du cordage
CN107317295A (zh) * 2017-08-29 2017-11-03 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

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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
ATE248503T1 (de) * 1996-01-25 2003-09-15 Ppi Corp Pty Ltd Rohr mit einem längsverstärkungsglied das eine längspannung erlaubt
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
ES2263760T3 (es) * 2002-12-13 2006-12-16 S.I.C. Milano S.R.L. Anclaje para cuerda y metodo de produccion.
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
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FI67927B (fi) 1985-02-28
US4650715A (en) 1987-03-17
EP0025461B1 (fr) 1983-09-21
US4438293A (en) 1984-03-20
FI802909A7 (fi) 1981-03-19
NO802758L (no) 1981-03-19
FI67927C (fi) 1985-06-10
CA1134598A (fr) 1982-11-02
ATE4734T1 (de) 1983-10-15

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