EP0385549A1 - Electrical cable with a braid surrounding the cable core - Google Patents
Electrical cable with a braid surrounding the cable core Download PDFInfo
- Publication number
- EP0385549A1 EP0385549A1 EP90200449A EP90200449A EP0385549A1 EP 0385549 A1 EP0385549 A1 EP 0385549A1 EP 90200449 A EP90200449 A EP 90200449A EP 90200449 A EP90200449 A EP 90200449A EP 0385549 A1 EP0385549 A1 EP 0385549A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- metallic
- cable
- elements
- braiding
- cable according
- 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
Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 21
- 238000009954 braiding Methods 0.000 claims abstract description 19
- 239000004831 Hot glue Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- 229920000271 Kevlar® Polymers 0.000 claims description 2
- 239000004761 kevlar Substances 0.000 claims description 2
- 230000036039 immunity Effects 0.000 abstract description 3
- 229920000914 Metallic fiber Polymers 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000003000 extruded plastic Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
- H01B11/1808—Construction of the conductors
- H01B11/1813—Co-axial cables with at least one braided conductor
-
- 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
- H01B7/183—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring comprising synthetic filaments forming part of an outer sheath
Definitions
- the invention relates to an electrical cable with a braided strand consisting of crossed metallic braiding elements and surrounding the cable core, in which non-metallic elements of high tensile strength are braided.
- non-metallic threads of high tensile strength are combined with metallic wires of high electrical conductivity to form a mixed braid.
- the electrically conductive wires made of soft copper or aluminum cannot absorb high tensile forces. This is what the non-metallic threads, which consist of Keylar, for example, serve.
- the non-metallic threads which replace a metal thread in the braid, metal-free open areas to the interior of the cable are created. With a high-frequency cable, this results in higher attenuation. The immunity to interference decreases.
- the invention has for its object to improve the immunity to interference of a cable of the type mentioned and to avoid increases in attenuation.
- the solution is achieved in that the metallic braiding elements and the non-metallic elements are arranged radially one above the other in parallel.
- the mixed braid strand remains electrically as dense as in a purely metallic braid strand.
- non-metallic element At the points where a non-metallic element is clamped between the compartments, it causes the interlocking braiding elements to stick together. This increases the tensile strength of the cable.
- the cross-section required for the non-metallic strain relief elements is so small that the diameter of the cable is not appreciably increased as a result, but the tensile strength can be multiplied.
- the mechanical properties of the cable such as flexibility and temperature resistance are not affected.
- the electrical properties of a high-frequency cable in particular, remain unaffected by the non-metallic elements when these are arranged radially above the metallic braiding elements. Then there are only metallic braiding elements on the dielectric layer.
- the non-metallic elements can be coated with a hot-melt adhesive which, when heat is applied, causes them to be glued to adjacent cable assembly elements.
- a particularly high tensile strength is achieved in that the braided strand is applied tightly to an inner pressure-stable cable construction element.
- a suitable pressure-stable cable construction element is in particular the dielectric insulating layer of a coaxial cable.
- the figure shows a cross section through a high-frequency coaxial cable constructed according to the invention.
- a preferred field of application for such cables according to the invention are self-supporting coils for electrical connection with moving steering bodies.
- Such cables are stable in sea water down to water depths of 200 m.
- Every second braiding element 3 or 4 is assigned a non-metallic element 6, which in each case consists of numerous Kevlar threads and lies in the form of a flat band on the braiding elements 3 and 4 on the outside.
- the non-metallic elements are preferably applied to the metallic braiding elements when they run into a braiding device. Then the outer conductor and strain relief are manufactured in a single joint operation.
- the tensile strength of the cable described is three times higher than that of a cable with a non-reinforced copper braid. A sixfold tensile strength could be achieved by introducing a further eight non-metallic elements 6.
Landscapes
- Insulated Conductors (AREA)
- Communication Cables (AREA)
Abstract
Die Erfindung betrifft ein elektrisches Kabel mit einem aus gekreuzten metallischen Flechtelementen bestehenden, die Kabelseele umgebenden Flechtstrang, in welchen nichtmetallische Elemente hoher Zugfestigkeit eingeflochten sind. Verbesserte Werte für Störstrahlungsfestigkeit und Dämpfung ergeben sich dadurch, daß die metallischen Flechtelemente und die nichtmetallischen Elemente parallellaufend radial übereinander angeordnet sind.The invention relates to an electrical cable with a braided strand consisting of crossed metallic braiding elements and surrounding the cable core, in which non-metallic elements of high tensile strength are braided. Improved values for interference immunity and attenuation result from the fact that the metallic braiding elements and the non-metallic elements are arranged radially one above the other in parallel.
Description
Die Erfindung bezieht sich auf ein elektrisches Kabel mit einem aus gekreuzten metallischen Flechtelementen bestehenden, die Kabelseele umgebenden Flechstrang, in welchen nichtmetallische Elemente hoher Zugfestigkeit eingeflochten sind.The invention relates to an electrical cable with a braided strand consisting of crossed metallic braiding elements and surrounding the cable core, in which non-metallic elements of high tensile strength are braided.
Beim durch die DE-A 35 40 684 bekannten Kabel dieser Art sind nichtmetallische Fäden hoher Zugfestigkeit mit metallischen Drähten hoher elektrischer Leitfähigkeit zu einem Mischgeflecht vereinigt. Die elektrisch leitfähigen, aus weichem Kupfer oder Aluminium bestehenden Drähte können keine hohen Zugkräfte aufnehmen. Dazu dienen die nichtmetallischen Fäden, die beispielsweise aus Keylar bestehen. Infolge der nichtmetallischen Fäden, welche im Geflecht gleichsam einen Metallfaden ersetzen, entstehen metallfreie offene Bereiche zum Kabelinneren. Bei einem Hochfrequenzkabel entstehen dadurch höhere Dämpfungen. Die Störstrahlfestigkeit nimmt ab.In the cable of this type known from DE-A 35 40 684, non-metallic threads of high tensile strength are combined with metallic wires of high electrical conductivity to form a mixed braid. The electrically conductive wires made of soft copper or aluminum cannot absorb high tensile forces. This is what the non-metallic threads, which consist of Keylar, for example, serve. As a result of the non-metallic threads, which replace a metal thread in the braid, metal-free open areas to the interior of the cable are created. With a high-frequency cable, this results in higher attenuation. The immunity to interference decreases.
Der Erfindung liegt die Aufgabe zugrunde, die Störstrahlfestigkeit eines Kabels der eingangs genannten Art zu verbessern und Dämpfungserhöhungen zu vermeiden.The invention has for its object to improve the immunity to interference of a cable of the type mentioned and to avoid increases in attenuation.
Die Lösung gelingt dadurch, daß die metallischen Flechtelemente und die nichtmetallischen Elemente parallellaufend radial übereinander angeordnet sind.The solution is achieved in that the metallic braiding elements and the non-metallic elements are arranged radially one above the other in parallel.
Bei der erfindungsgemäßen Anordnung der nichtmetallischen Elemente bleibt der gemischte Flechtstrang elektrisch genau so dicht, wie bei einem rein metallischen Flechtstrang.In the arrangement of the non-metallic elements according to the invention, the mixed braid strand remains electrically as dense as in a purely metallic braid strand.
An den Stellen, wo ein nichtmetallisches Element zwischen den Fachungen geklemmt liegt, bewirkt es einen reibschlüssigen Zusammenhalt der sich kreuzenden Flechtelemente. Dadurch wird die Zugbelastbarkeit des Kabels zusätzlich erhöht. Der für die nichtmetallischen Zugentlastungselemente benötigte Querschnitt ist so gering, daß der Durchmesser des Kabels dadurch nicht merkbar vergrößert wird, während sich aber die Zugfestigkeit vervielfachen läßt. Die mechanischen Eigenschaften des Kabels wie Flexibilität und Temperaturfestigkeit werden nicht beeinträchtigt.At the points where a non-metallic element is clamped between the compartments, it causes the interlocking braiding elements to stick together. This increases the tensile strength of the cable. The cross-section required for the non-metallic strain relief elements is so small that the diameter of the cable is not appreciably increased as a result, but the tensile strength can be multiplied. The mechanical properties of the cable such as flexibility and temperature resistance are not affected.
Die elektrischen Eigenschaften insbesondere eines Hochfrequenzkabels bleiben dann unbeeinflußt von den nichtmetallischen Elementen, wenn diese radial über den metallischen Flechtelementen angeordnet sind. Dann liegen an der Dielektrikumschicht nur metallische Flechtelemente an.The electrical properties of a high-frequency cable, in particular, remain unaffected by the non-metallic elements when these are arranged radially above the metallic braiding elements. Then there are only metallic braiding elements on the dielectric layer.
Die metallischen Flechtelemente bestehen vorzugsweise aus parallellaufenden Einzeldrähten. Dann erstrecken sich vorteilhaft die nichtmetallischen Elemente bandförmig flach über mindestens einen Teil der Einzeldrähte. Wegen der dann besonders geringen radialen Abmessungen der nichtmetallischen Elemente ergeben sich praktisch keine Durchmesservergrößerungen des Kabels.The metallic braiding elements preferably consist of individual wires running in parallel. Then the non-metallic elements advantageously extend in a band-shaped flat manner over at least part of the individual wires. Because of the particularly small radial dimensions of the non-metallic elements, there is practically no increase in the diameter of the cable.
Einen verbesserten Kraftschluß zwischen den Kreuzungspunkten der Flechtelemente und auch zu einer gegebenenfalls aufextrudierten Kuststoffhülle erreicht man durch Verklebung. Insbesondere können die nichtmetallischen Elemente mit einem Schmelzkleber beschichtet werden, welcher bei Wärmezufuhr eine Verklebung mit benachbarten Kabelaufbauelementen bewirkt.An improved adhesion between the crossing points of the braiding elements and also to a possibly extruded plastic cover can be achieved by gluing. In particular, the non-metallic elements can be coated with a hot-melt adhesive which, when heat is applied, causes them to be glued to adjacent cable assembly elements.
Eine besonders hohe Zugfestigkeit erreicht man dadurch, daß der Flechtstrang enganliegend auf ein inneres druckstabiles Kabelaufbauelement aufgebracht ist. Ein geeignet druckstabiles Kabelaufbauelement ist insbesondere die dielektrische Isolierschicht eines Koaxialkabels.A particularly high tensile strength is achieved in that the braided strand is applied tightly to an inner pressure-stable cable construction element. A suitable pressure-stable cable construction element is in particular the dielectric insulating layer of a coaxial cable.
Die Erfindung wird anhand der Zeichnung näher erläutert.The invention is explained in more detail with reference to the drawing.
Die Figur zeigt einen Querschnitt durch ein erfindungsgemäß aufgebautes Hochfrequenz-Koaxialkabel. Eine bevorzugtes Anwendungsgebiet für solche erfindungsgemäßen Kabel sind selbsttragende Wickel zur elektrischen Verbindung mit sich bewegenden Lenkkörpern. Solche Kabel sind seewasserstabil bis in Wassertiefen von 200 m einsetzbar.The figure shows a cross section through a high-frequency coaxial cable constructed according to the invention. A preferred field of application for such cables according to the invention are self-supporting coils for electrical connection with moving steering bodies. Such cables are stable in sea water down to water depths of 200 m.
Um einen zentralen Litzenleiter 1 und ein isolierendes Dielektrikum 2 ist ein Flechtstrang stramm aufgeflochten. Er besteht aus gegensinnig wendelförmig verlaufenden Flechtelementen 3 bzw. 4, die durch Fachung abwechselnd innen und außen verlaufen. Sie bestehen jeweils beispielsweise aus fünf Weich-Cu-Drähten 5.A braided strand is braided tightly around a central stranded conductor 1 and an insulating dielectric 2. It consists of oppositely helical braiding elements 3 and 4, which run alternately inside and outside due to the fold. They each consist of five
Jedem zweiten Flechtelement 3 bzw. 4 ist ein nichtmetallisches Element 6 zugeordnet, welches jeweils aus zahlreichen Kevlarfäden besteht und in Form eines flachen Bandes an den Flechtelementen 3 bzw. 4 außen anliegt.Every second braiding element 3 or 4 is assigned a non-metallic element 6, which in each case consists of numerous Kevlar threads and lies in the form of a flat band on the braiding elements 3 and 4 on the outside.
Durch Schmelzkleberbeschichtung der nichtmetallischen Elemente 6 läßt sich nach Erwärmung an den Überlappungsstellen ein Kraftschluß zwischen den Flechtelementen und auch eine Haftung zum Kabelmantel 7 erreichen.By means of hot-melt adhesive coating of the non-metallic elements 6, after heating at the overlap points, a frictional connection between the braided elements and also adhesion to the
Die nichtmetallischen Elemente werden vorzugsweise beim Einlaufen in eine Flechteinrichtung an die metallischen Flechtelemente angelegt. Dann werden Außenleiter und Zugentlastung in einem einzigen gemeinsamen Arbeitsgang gefertigt.The non-metallic elements are preferably applied to the metallic braiding elements when they run into a braiding device. Then the outer conductor and strain relief are manufactured in a single joint operation.
Die Zugfestigkeit des beschriebenen Kabel ist dreifach höher als bei einem Kabel mit nicht verstärktem Kupfergeflecht. Durch Einbringung weiterer acht nichtmetallischer Elemente 6 konnte eine 6- fache Zugfestigkeit erreicht werden.The tensile strength of the cable described is three times higher than that of a cable with a non-reinforced copper braid. A sixfold tensile strength could be achieved by introducing a further eight non-metallic elements 6.
Bis zur Zerreißgranze ergaben sich Dehnungen von nur etwa 2,5 %, so daß das Kabel bis zur Zerstörung funktionsfähig bleibt.Up to the tear limit, elongations of only about 2.5% resulted, so that the cable remains functional until it is destroyed.
Claims (7)
dadurch gekennzeichnet, daß die nichtmetallischen Elemente (6) radial über den metallischen Flechtelementen (3,4) angeordnet sind.2. Cable according to claim 1,
characterized in that the non-metallic elements (6) are arranged radially above the metallic braiding elements (3, 4).
dadurch gekennzeichnet, daß ein metallisches Flechtelement (3,4) aus parellellaufenden Einzeldrähten (5) besteht, und daß sich ein nichtmetallisches Element (6) bandförmig flach über mindestens einen Teil der Einzeldrähte (5) erstreckt.3. Cable according to claim 1 or 2,
characterized in that a metallic braiding element (3, 4) consists of parallel individual wires (5), and in that a non-metallic element (6) extends flatly over at least part of the individual wires (5).
dadurch gekennzeichnet, daß die nichtmetallischen Elemente (6) mit benachbarten Aufbauelementen des Kabels (3,47) insbesondere durch Schmelzkleber verklebt sind.4. Cable according to one of claims 1 to 3,
characterized in that the non-metallic elements (6) are glued to adjacent structural elements of the cable (3,47), in particular by hot melt adhesive.
dadurch gekennzeichnet, daß der Flechtstrang enganliegend auf ein inneres druckstabiles Kabelaufbauelement (2) aufgebracht ist.6. Cable according to one of claims 1 to 5,
characterized in that the braided strand is applied tightly to an inner pressure-stable cable construction element (2).
dadurch gekennzeichnet, daß das druckstabile Kabelelement die dielektrische Isolierschicht (2) eines Koaxialkabels ist.7. Cable according to claim 6,
characterized in that the pressure-stable cable element is the dielectric insulating layer (2) of a coaxial cable.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3906575A DE3906575A1 (en) | 1989-03-02 | 1989-03-02 | ELECTRIC CABLE WITH A BRAID CORD SURROUNDING THE CABLE CORE |
| DE3906575 | 1989-03-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0385549A1 true EP0385549A1 (en) | 1990-09-05 |
| EP0385549B1 EP0385549B1 (en) | 1993-09-22 |
Family
ID=6375297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90200449A Expired - Lifetime EP0385549B1 (en) | 1989-03-02 | 1990-02-26 | Electrical cable with a braid surrounding the cable core |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5023405A (en) |
| EP (1) | EP0385549B1 (en) |
| JP (1) | JP2854076B2 (en) |
| DE (2) | DE3906575A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1096511A2 (en) * | 1999-10-29 | 2001-05-02 | Totoku Electric Co., Ltd. | Coaxial cable producing method and coaxial cable |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4038161A1 (en) * | 1990-11-30 | 1992-06-04 | Feldhoff Gmbh & Co Barthels | Braided mantle and core - are bonded together by a heat activated adhesive component |
| JP2586710Y2 (en) * | 1991-07-10 | 1998-12-09 | 西日本電線株式会社 | Self-supporting cable for uninterrupted work |
| JP5124902B2 (en) * | 2004-12-09 | 2013-01-23 | ソニー株式会社 | Shielded cable |
| DE102007050402B3 (en) * | 2007-10-19 | 2009-06-04 | Geo. Gleistein & Sohn Gmbh | Rope with electrical conductor received therein |
| US9035185B2 (en) | 2010-05-03 | 2015-05-19 | Draka Holding N.V. | Top-drive power cable |
| JP5488649B2 (en) * | 2012-07-02 | 2014-05-14 | ソニー株式会社 | Shielded cable |
| JP2020187974A (en) * | 2019-05-17 | 2020-11-19 | 矢崎総業株式会社 | Braided shield and shield electric wire |
| JP7140074B2 (en) * | 2019-08-27 | 2022-09-21 | 日立金属株式会社 | coaxial cable |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1408054A (en) * | 1964-09-17 | 1965-08-06 | Ass Elect Ind | Improvements to electric cables |
| FR1440850A (en) * | 1965-04-23 | 1966-06-03 | Duval S A Ets | Protections for flexible electric cables |
| US4641110A (en) * | 1984-06-13 | 1987-02-03 | Adams-Russell Company, Inc. | Shielded radio frequency transmission cable having propagation constant enhancing means |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE524649C (en) * | 1931-05-11 | Land Und Seekabelwerke Akt Ges | Movable connection cable | |
| FR816295A (en) * | 1937-01-13 | 1937-08-04 | Lignes Telegraph Telephon | Cable for high frequency transmissions |
| US2488527A (en) * | 1944-06-07 | 1949-11-22 | Dutcher Harold William | Extensible conductor |
| US4317000A (en) * | 1980-07-23 | 1982-02-23 | The United States Of America As Represented By The Secretary Of The Navy | Contrahelically laid torque balanced benthic cable |
| US4491939A (en) * | 1981-08-13 | 1985-01-01 | The Commonwealth Of Australia | Hydrophone cable |
| DE3540684A1 (en) * | 1984-10-05 | 1987-05-27 | Kabelmetal Electro Gmbh | Multi-core electrical power cable, in particular supply cable for well-head equipment |
-
1989
- 1989-03-02 DE DE3906575A patent/DE3906575A1/en not_active Withdrawn
-
1990
- 1990-02-26 EP EP90200449A patent/EP0385549B1/en not_active Expired - Lifetime
- 1990-02-26 DE DE90200449T patent/DE59002781D1/en not_active Expired - Fee Related
- 1990-02-27 JP JP2044650A patent/JP2854076B2/en not_active Expired - Fee Related
- 1990-03-01 US US07/487,676 patent/US5023405A/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1408054A (en) * | 1964-09-17 | 1965-08-06 | Ass Elect Ind | Improvements to electric cables |
| FR1440850A (en) * | 1965-04-23 | 1966-06-03 | Duval S A Ets | Protections for flexible electric cables |
| US4641110A (en) * | 1984-06-13 | 1987-02-03 | Adams-Russell Company, Inc. | Shielded radio frequency transmission cable having propagation constant enhancing means |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1096511A2 (en) * | 1999-10-29 | 2001-05-02 | Totoku Electric Co., Ltd. | Coaxial cable producing method and coaxial cable |
| EP1096511A3 (en) * | 1999-10-29 | 2001-08-08 | Totoku Electric Co., Ltd. | Coaxial cable producing method and coaxial cable |
| US6484392B1 (en) | 1999-10-29 | 2002-11-26 | Totoku Electric Co., Ltd. | Method of producing coaxial cable |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3906575A1 (en) | 1990-09-06 |
| JPH02273415A (en) | 1990-11-07 |
| DE59002781D1 (en) | 1993-10-28 |
| US5023405A (en) | 1991-06-11 |
| EP0385549B1 (en) | 1993-09-22 |
| JP2854076B2 (en) | 1999-02-03 |
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