ITMI20101355A1 - "ROPE FOR HIGH-VOLTAGE AIR LINES WITH HIGH THERMAL LIMIT AND 3 CARRIERS" - Google Patents
"ROPE FOR HIGH-VOLTAGE AIR LINES WITH HIGH THERMAL LIMIT AND 3 CARRIERS" Download PDFInfo
- Publication number
- ITMI20101355A1 ITMI20101355A1 IT001355A ITMI20101355A ITMI20101355A1 IT MI20101355 A1 ITMI20101355 A1 IT MI20101355A1 IT 001355 A IT001355 A IT 001355A IT MI20101355 A ITMI20101355 A IT MI20101355A IT MI20101355 A1 ITMI20101355 A1 IT MI20101355A1
- Authority
- IT
- Italy
- Prior art keywords
- sheath
- rope
- aluminum
- filling elements
- load
- Prior art date
Links
- 239000000969 carrier Substances 0.000 title 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 12
- 229910045601 alloy Inorganic materials 0.000 claims description 9
- 239000000956 alloy Substances 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 229910018134 Al-Mg Inorganic materials 0.000 claims description 3
- 229910018467 Al—Mg Inorganic materials 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 229910018580 Al—Zr Inorganic materials 0.000 claims description 2
- 229920000784 Nomex Polymers 0.000 claims description 2
- 239000004519 grease Substances 0.000 claims description 2
- 239000004763 nomex Substances 0.000 claims description 2
- 235000019892 Stellar Nutrition 0.000 claims 1
- 238000004132 cross linking Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- ZGUQGPFMMTZGBQ-UHFFFAOYSA-N [Al].[Al].[Zr] Chemical compound [Al].[Al].[Zr] ZGUQGPFMMTZGBQ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/08—Several wires or the like stranded in the form of a rope
- H01B5/10—Several wires or the like stranded in the form of a rope stranded around a space, insulating material, or dissimilar conducting material
- H01B5/102—Several wires or the like stranded in the form of a rope stranded around a space, insulating material, or dissimilar conducting material stranded around a high tensile strength core
- H01B5/105—Several wires or the like stranded in the form of a rope stranded around a space, insulating material, or dissimilar conducting material stranded around a high tensile strength core composed of synthetic filaments, e.g. glass-fibres
Landscapes
- Non-Insulated Conductors (AREA)
- Ropes Or Cables (AREA)
- Insulated Conductors (AREA)
Description
Descrizione Description
Il presente trovato si riferisce a una corda per linee elettriche aeree; in particolare la corda à ̈ adatta per condizioni estreme sia ambientali (freddo, ghiaccio e vento) sia di installazione (grandi dislivelli). The present invention relates to a rope for overhead electric lines; in particular, the rope is suitable for extreme conditions both environmental (cold, ice and wind) and installation (large differences in height).
Come noto, corde del tipo indicato vengono attualmente realizzate mediante un cavo portante, solitamente in acciaio, il quale supporta fili in materiale conduttore, solitamente in alluminio o sue leghe. As is known, ropes of the type indicated are currently made by means of a supporting cable, usually made of steel, which supports wires of conductive material, usually of aluminum or its alloys.
Tuttavia, questi cavi tradizionali (a causa delle caratteristiche intrinseche del cavo portante in acciaio) presentano un peso notevole per unità di lunghezza ed un elevato coefficiente medio di dilatazione termica. However, these traditional cables (due to the intrinsic characteristics of the supporting steel cable) have a considerable weight per unit of length and a high average coefficient of thermal expansion.
Queste caratteristiche non permettono l’utilizzo delle corde convenzionali in contesti gravosi quali temperature estreme, presenza di ghiaccio e vento e grandi dislivelli. These characteristics do not allow the use of conventional ropes in severe contexts such as extreme temperatures, presence of ice and wind and large differences in height.
Scopo della presente invenzione à ̈ quello di realizzare corde per linee elettriche che permettano di superare gli inconvenienti tecnici lamentati della tecnica nota. The object of the present invention is that of realizing cords for electric lines which allow to overcome the technical drawbacks of the known art.
Questi ed altri scopi, secondo la presente invenzione vengono raggiunti realizzando una corda secondo gli insegnamenti tecnici delle rivendicazioni qui allegate. These and other purposes, according to the present invention, are achieved by making a rope according to the technical teachings of the claims attached hereto.
Ulteriori caratteristiche e vantaggi del trovato risulteranno evidenti dalla descrizione di una forma di realizzazione preferita ma non esclusiva del trovato, illustrata a titolo esemplificativo e quindi non limitativo nel’unica figura che rappresenta una sezione della corda. Further characteristics and advantages of the invention will become evident from the description of a preferred but not exclusive embodiment of the invention, illustrated by way of example and therefore not limitative in the single figure which represents a section of the string.
La corda 1 presenta un nucleo 2 attorno al quale sono avvolti uno, due o più anelli o corone di conci elettricamente conduttivi 3. I conci elettricamente conduttivi sono cordati attorno al nucleo in maniera nota. In forme alternative di realizzazione essi possono essere formati da fili in alluminio a sezione circolare. The rope 1 has a core 2 around which one, two or more rings or crowns of electrically conductive segments are wound 3. The electrically conductive segments are strung around the core in a known manner. In alternative embodiments they can be formed from aluminum wires with a circular section.
Preferibilmente essi sono realizzati in lega Al-Zr, ma altri materiali che possono ugualmente essere utilizzati sono: alluminio ricotto o lega Al-Mg. Preferably they are made of Al-Zr alloy, but other materials which can equally be used are: annealed aluminum or Al-Mg alloy.
Nella figura il nucleo 2 Ã ̈ formato da tre funi 4 portanti reciprocamente poggiate e cordate. In the figure the core 2 is made up of three supporting ropes 4 mutually supported and strung together.
Ciascuna fune 4 à ̈ formata da una pluralità fili 5 anch’essi cordati e realizzati in materiale composito di fibre ibride carbonio/vetro. I fili 5 sono rivestiti da una prima guaina 6 di alluminio (o di altro materiale ad esempio alluminio zirconio o lega Al-Mg) estrusa a caldo direttamente sui fili 5. Each rope 4 is made up of a plurality of wires 5 which are also stranded and made of a composite material of hybrid carbon / glass fibers. The wires 5 are coated with a first sheath 6 of aluminum (or of another material such as aluminum zirconium or Al-Mg alloy) which is hot extruded directly onto the wires 5.
Nella forma di realizzazione descritta i fili che compongono ciascuna fune sono sette. Un tale numero di fili permette di assumere esternamente alla fune una conformazione della sezione quasi circolare, che facilita l’estrusione della prima guaina 6. Ovviamente però può essere usato un numero qualsiasi di fili. In the embodiment described, the wires that make up each rope are seven. Such a number of wires makes it possible to assume an almost circular section shape externally to the rope, which facilitates the extrusion of the first sheath 6. Obviously, however, any number of wires can be used.
Vantaggiosamente prima dell’estrusione della guaina i fili in materiale composito vengono rivestiti da del tamponante 7 speciale (preferibilmente siliconico o bi-componente a reticolazione programmata) e vengono poi avvolte in un nastro speciale (vantaggiosamente in nomex) che mantiene il tamponante 7 in posizione durante le operazioni di estrusione della guaina 6. Advantageously, before the sheath extrusion, the threads in composite material are coated with a special buffer 7 (preferably silicone or bi-component with programmed crosslinking) and are then wrapped in a special tape (advantageously in Nomex) which keeps the buffer 7 in position during sheath extrusion operations 6.
Vantaggiosamente il tamponante 7 à ̈ del grasso siliconico bi-componente, molto viscoso. Esso à ̈ reticolante e tende a solidificare in maniera programmata (nel presente testo per “programmabile†si intende un materiale la cui velocità di reticolazione può essere decisa a priori, ad esempio 3 minuti – 24h). Advantageously, the buffer 7 is a two-component, very viscous silicone grease. It is cross-linking and tends to solidify in a programmed manner (in this text, â € œprogrammableâ € means a material whose cross-linking speed can be decided a priori, for example 3 minutes - 24h).
E’anche possibile evitare l’utilizzo del tamponante 7 estrudendo la guaina 6 intorno ai fili in modo che l’alluminio penetri anche nelle aree stellari. It is also possible to avoid the use of the buffer 7 by extruding the sheath 6 around the wires so that the aluminum also penetrates the star areas.
Cordati con le funi portanti 4 sono previsti almeno tre elementi riempitivi 8 tubolari in alluminio (oppure realizzati in fili pieni/compatti). Essi sono internamente cavi e ciò consente di alleggerire notevolmente la corda rispetto all’utilizzo di elementi riempitivi pieni. Nel caso si voglia aumentare ancora di più il carico di rottura gli elementi riempitivi tubolari possono essere integrati da un’anima di fili compositi ibridi carbonio/vetro. Twisted with the supporting ropes 4 there are at least three tubular aluminum filling elements 8 (or made of solid / compact wires). They are internally hollow and this allows to considerably lighten the rope compared to the use of solid filler elements. If you want to increase the breaking load even more, the tubular filling elements can be integrated with a core of hybrid carbon / glass composite threads.
A conclusione della descrizione della figura 1 si sottolinea che le funi portanti 4 e gli elementi riempitivi 8 sono circondati e mantenuti in posizione da una seconda guaina 9 in alluminio formata da un elemento a C all’interno del quale vengono alloggiate le funi e gli elementi riempitivi e che viene poi saldato longitudinalmente. At the end of the description of figure 1 it is emphasized that the supporting ropes 4 and the filling elements 8 are surrounded and held in position by a second aluminum sheath 9 formed by a C-shaped element inside which the ropes and the filling elements and which is then welded longitudinally.
La saldatura avviene preferibilmente per saldatura TIG, ma à ̈ possibile utilizzare anche una saldatura Laser o Microplasma. The welding is preferably done by TIG welding, but it is also possible to use a laser or microplasma welding.
La seconda guaina 9 può alternativamente essere sostituita da una fasciatura in materiale elettricamente conduttivo, oppure tramite estrusione di tale materiale elettricamente conduttivo intorno a funi e elementi riempitivi. The second sheath 9 can alternatively be replaced by a bandage made of electrically conductive material, or by extrusion of this electrically conductive material around ropes and filling elements.
Come ben visibile dalla figura di cui sopra le tre funi portanti, quando viste in sezione, sono poste ai vertici di un triangolo equilatero così come anche gli elementi riempitivi. As can be clearly seen from the above figure, the three load-bearing ropes, when seen in section, are placed at the vertices of an equilateral triangle as well as the filling elements.
In una forma alternativa di realizzazione la corda sopra descritta prevede sette funi portanti 4 e sei elementi riempitivi 8, ma in altre forme di realizzazione può essere previsto un numero differente di funi portanti e elementi riempitivi. In an alternative embodiment the rope described above provides seven carrying ropes 4 and six filling elements 8, but in other embodiments a different number of supporting ropes and filling elements may be provided.
La corda sopra descritta ha vantaggiosamente un alto limite termico (fino a 150°C) ed à ̈ preferibilmente dotata di una massa contenuta (inferiore a 4kg/m). The rope described above advantageously has a high thermal limit (up to 150 ° C) and is preferably equipped with a low mass (less than 4kg / m).
Il diametro esterno massimo à ̈ preferibilmente di circa 50mm, il che consente di ridurre al minimo l’effetto corona. Date le vaste superfici conduttive formate dalla doppia serie di conci, la seconda guaina, la prima guaina e gli elementi riempitivi tubolari, la corda presenta alte portate di corrente con conseguente bassa resistenza. The maximum external diameter is preferably about 50mm, which allows to minimize the corona effect. Given the large conductive surfaces formed by the double series of segments, the second sheath, the first sheath and the tubular filling elements, the rope has high current capacities with consequent low resistance.
L’anima in materiale composito a base di carbonio e fibre di vetro permette deformazioni ridotte agli alti carichi. Le caratteristiche intrinseche della corda la rendono particolarmente adatta per installazioni su linee aeree per alta tensione in condizione climatiche estreme (vento e ghiaccio fino a 60 mm di spessore) in virtù dei suoi altissimi carichi di rottura. The core in composite material based on carbon and glass fibers allows reduced deformation at high loads. The intrinsic characteristics of the rope make it particularly suitable for installations on high voltage overhead lines in extreme climatic conditions (wind and ice up to 60 mm thick) thanks to its very high breaking loads.
A titolo di esempio essa può essere installata su dislivelli di 300 m con campate di 1000 metri circa. As an example, it can be installed on slopes of 300 m with spans of about 1000 meters.
Il funzionamento del trovato appare evidente per il tecnico del ramo da quanto à ̈ stato descritto e in particolare à ̈ il seguente. The operation of the invention appears evident to the person skilled in the art from what has been described and in particular is the following.
Claims (10)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI2010A001355A IT1401307B1 (en) | 2010-07-22 | 2010-07-22 | ROPE FOR HIGH-VOLTAGE AIR LINES WITH HIGH THERMAL LIMIT AND 3 CARRIERS |
ES11174563.4T ES2618877T3 (en) | 2010-07-22 | 2011-07-19 | Rope for high voltage overhead power lines, with a high thermal limit and with 3 charging support cables |
EP11174563.4A EP2410534B1 (en) | 2010-07-22 | 2011-07-19 | Cord for high voltage overhead electrical lines, with high thermal limit and with 3 load-bearing cables |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI2010A001355A IT1401307B1 (en) | 2010-07-22 | 2010-07-22 | ROPE FOR HIGH-VOLTAGE AIR LINES WITH HIGH THERMAL LIMIT AND 3 CARRIERS |
Publications (2)
Publication Number | Publication Date |
---|---|
ITMI20101355A1 true ITMI20101355A1 (en) | 2012-01-23 |
IT1401307B1 IT1401307B1 (en) | 2013-07-18 |
Family
ID=43607809
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ITMI2010A001355A IT1401307B1 (en) | 2010-07-22 | 2010-07-22 | ROPE FOR HIGH-VOLTAGE AIR LINES WITH HIGH THERMAL LIMIT AND 3 CARRIERS |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2410534B1 (en) |
ES (1) | ES2618877T3 (en) |
IT (1) | IT1401307B1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3004847B1 (en) | 2013-04-17 | 2016-07-29 | Nexans | JONCS COMPOSITES ELECTRICITY TRANSPORT CABLE |
WO2015155728A1 (en) * | 2014-04-09 | 2015-10-15 | De Angeli Prodotti S.R.L. | Conductor for bare overhead electric lines, especially for middle-high thermal limit, and low expansion at high electronic loads |
CN105810296A (en) * | 2016-05-04 | 2016-07-27 | 江苏红峰电缆集团有限公司 | 1kv aluminum-core overhead cable |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03129606A (en) * | 1989-07-27 | 1991-06-03 | Hitachi Cable Ltd | Aerial power cable |
US20050181228A1 (en) * | 2004-02-13 | 2005-08-18 | 3M Innovative Properties Company | Metal-cladded metal matrix composite wire |
EP1821318A2 (en) * | 2006-02-17 | 2007-08-22 | De Angeli Prodotti S.r.l. | conductor cable for electrical lines |
EP1928001A1 (en) * | 2006-12-01 | 2008-06-04 | Nexans | Electrical transport conductor for overhead line |
-
2010
- 2010-07-22 IT ITMI2010A001355A patent/IT1401307B1/en active
-
2011
- 2011-07-19 ES ES11174563.4T patent/ES2618877T3/en active Active
- 2011-07-19 EP EP11174563.4A patent/EP2410534B1/en not_active Not-in-force
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03129606A (en) * | 1989-07-27 | 1991-06-03 | Hitachi Cable Ltd | Aerial power cable |
US20050181228A1 (en) * | 2004-02-13 | 2005-08-18 | 3M Innovative Properties Company | Metal-cladded metal matrix composite wire |
EP1821318A2 (en) * | 2006-02-17 | 2007-08-22 | De Angeli Prodotti S.r.l. | conductor cable for electrical lines |
EP1928001A1 (en) * | 2006-12-01 | 2008-06-04 | Nexans | Electrical transport conductor for overhead line |
Also Published As
Publication number | Publication date |
---|---|
EP2410534A1 (en) | 2012-01-25 |
IT1401307B1 (en) | 2013-07-18 |
EP2410534B1 (en) | 2016-12-14 |
ES2618877T3 (en) | 2017-06-22 |
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