EP1484945A1 - Câble chauffant électrique ou ruban chauffant électrique - Google Patents

Câble chauffant électrique ou ruban chauffant électrique Download PDF

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Publication number
EP1484945A1
EP1484945A1 EP04010990A EP04010990A EP1484945A1 EP 1484945 A1 EP1484945 A1 EP 1484945A1 EP 04010990 A EP04010990 A EP 04010990A EP 04010990 A EP04010990 A EP 04010990A EP 1484945 A1 EP1484945 A1 EP 1484945A1
Authority
EP
European Patent Office
Prior art keywords
heating
polytetrafluoroethylene
tape
insulating layer
tape 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
Application number
EP04010990A
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German (de)
English (en)
Other versions
EP1484945B1 (fr
Inventor
Klaus Schwamborn
Wolfgang Dlugas
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.)
HEW Kabel GmbH and Co KG
Original Assignee
HEW Kabel CDT GmbH and Co KG
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
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Application filed by HEW Kabel CDT GmbH and Co KG filed Critical HEW Kabel CDT GmbH and Co KG
Publication of EP1484945A1 publication Critical patent/EP1484945A1/fr
Application granted granted Critical
Publication of EP1484945B1 publication Critical patent/EP1484945B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/54—Heating elements having the shape of rods or tubes flexible
    • H05B3/56—Heating cables

Definitions

  • the present invention relates to an electrical heating line or an electrical Heating tape with insulating coatings arranged in the layer structure Polytetrafluoroethylene.
  • heating cables in a coaxial arrangement known for example also for Heating aggressive media are heating cables in a coaxial arrangement known (DE-A 28 50 722), in which the heating conductor of a fluoropolymer as Insulating material is enclosed.
  • This insulation is covered by one Copper wire braid, using the individual wires to avoid corrosion are additionally nickel-plated.
  • This network of copper wires is the electrical one Protective conductor of the line used to avoid accident hazards, for example also due to a short circuit in the electrically conductive part, within the line is provided.
  • the protective conductor is covered by an external one Plastic sheath, which is used to protect against aggressive media in the environment, e.g. out is made of a fluoropolymer.
  • Advantage of such a coaxial Arrangement is in addition to the wide range of use of this line due to resistant to high temperatures and insensitive to aggressive media Materials that such lines in practically any lengths with high Flexibility can be produced.
  • Heating cable with a coaxial layer structure is already known (DE-ES 101 07 429).
  • both sides these two layers are air-impermeable layers of one extrudable fluoropolymer provided so that there is a between them Can form air cushions.
  • Layer construction that increases cable diameter leads to the deliberately created Air cushions in the interior of the cable significantly impair the Heat conduction away from the heating conductor to the cable surface and thus to one Deterioration of the efficiency of the heating cable itself.
  • the invention takes a different path to protect the layer structure of a heating cable or heating tape existing coverings (conductor insulation, intermediate sheath, outer protective sheath ) made of polytetrafluoroethylene. even with the greatest mechanical force Impact or crushing stress.
  • At least one of the polytetrafluoroethylene coatings is by at least one adjacent insulating layer from a melt processable fluoropolymer shockproof.
  • the invention is based on the Recognition that adequate protection against external mechanical Strains can be achieved through the juxtaposition of Polymer layers from the same polymer family, but different Polymer structure. So according to the proposal of the invention is the polytetrafluoroethylene with its fibrous, so-called fibril-containing, polymer structure through the neighboring thermoplastic polymer protected with its amorphous structure. This results from the fact that in contrast with impact or impact loads to the fiber structure the amorphous polymer structure has a shock absorbing effect.
  • An advantageous embodiment of the invention results in an electrical heating line in a coaxial arrangement with a central conductor, an insulation made of polytetrafluoroethylene and a protective conductor in the form of stranded or braided wires and an outer protective sheath when the polytetrafluoroethylene insulation has one or more layers. is shockproof by at least one adjacent insulating layer made of a fluoropolymer that can be processed from the melt.
  • a particularly advantageous embodiment of a heating line in a coaxial arrangement results according to the invention when the shock-absorbing insulating layer made of a melt-processable fluoropolymer is arranged below the polytetrafluoroethylene insulation surrounding the conductor, and thus directly on the conductor itself.
  • the heating cable according to the invention has no air cushions in the layer structure, the heating heat generated by the conductor thus reaches the cable / line surface without significant heat build-up, ie where it is also needed.
  • the construction of the line is problem-free in terms of production technology; the extruded polymer protective layers allow the line diameter to be kept small.
  • the polytetrafluoroethylene insulation is a heat treatment is subjected to for the purpose of sintering the polymer material the resulting shrinkage of the polytetrafluoroethylene compacting of the layer structure.
  • the line is therefore, in contrast to the known Heating cable with air cushion, also longitudinally watertight, while known Glass fiber mesh, mica tapes or inorganic foils are another have unwanted wicking and therefore for an ideal Ensure moisture transport.
  • heating tapes of the most varied of embodiments are also used. If such a heating tape consists, for example, of parallel feed wires and a heating coil contacting the conductors of these feed wires at intervals and an intermediate jacket and / or an outer jacket made of polytetrafluoroethylene, then at least one jacket layer can be processed from the melt by at least one adjacent insulating layer in the implementation of the invention Shockproof fluoropolymer.
  • a heating tape with parallel, non-insulated feed conductors and a heating wire guided parallel to these and contacted with the feed conductors at intervals and a common covering made of polytetrafluoroethylene the covering is shock-protected according to the invention by at least one adjacent insulating layer made of a fluoropolymer that can be processed from the melt .
  • Self-limiting heating tapes have proven to be advantageous for special applications, for example in explosion protection.
  • These heating tapes with parallel, non-insulated feeders and a semiconducting sheath enclosing them, as well as common insulation and / or an outer protective jacket made of polytetrafluoroethylene are in turn the common insulation and / or Protective sheath with shock protection according to the proposal of the invention.
  • the purpose of the longitudinal water-tightness and compactness of the heating lines or heating tapes according to the invention also serves to weld or glue the shock-absorbing insulating layers to the polytetrafluoroethylene sheathings. At the same time, the bending fatigue strength of such arrangements is significantly increased.
  • the thickness of the shock absorbing layer is 0.1 to 0.8 mm, preferably 0.2 to 0.5 mm. In the case of heating cables in a coaxial arrangement and the shock-absorbing insulating layer located directly on the conductor, the thickness to be selected essentially depends on the respective conductor diameter. For example, the shock absorbing layer with a conductor diameter of 1.5 mm is 0.2 mm.
  • the invention also offers particular advantages when the conductor insulation is made a polytetrafluoroethylene tape wrapped with overlap of the edges exists, for example with a rectangular cross section.
  • the liability of adjoining layers is improved, the further gained thereby Compactness ensures high stability of the cable against kinking and bending.
  • the shock absorbing layer according to the invention consists of one of the Melt processable fluoropolymer. Since it is in a generic Heating line or a heating tape from their task to a high Permanent temperature resistance, possibly also under the influence of aggressive Media that arrives can advantageously be made from a shock absorbing layer Prepare tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (TFA / PFA). But also the tetrafluoroethylene / hexafluoropropylene copolymer (FEP) or the Polytetrafluoroethylene-perfluoromethyl vinyl ether copolymer, also known as the trade name HYFLON MFA, depending on the application, are advantageous Polymers for carrying out the invention.
  • TFA / PFA tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer
  • FEP tetrafluoroethylene / hexafluoropropylene copolymer
  • PVDF polyvinylidene fluoride
  • ETFE ethylene tetrafluoroethylene
  • a particularly advantageous embodiment of the invention results in a Polytetrafluoroethylene - wrapping from a wound polytetrafluoroethylene - Band if this has a plano-convex cross-sectional shape. Across from The plano-convex leads common belts with a rectangular cross-sectional shape Form after winding and sintering the polytetrafluoroethylene tape into one compact casing with closed smooth outer surface. This is from particularly advantageous when the outer surface of the aggressive media Environment is exposed.
  • Another beneficial way of improving insulation quality opposite to that of rectangular ribbons is that of the ribbon Form polytetrafluoroethylene in cross section as a flat profile, with from the center edge areas tapering to both sides and on the edges regular band course.
  • PTFE strip material
  • the edges of the tape are advantageous Polytetrafluoroethylene broadly drawn, the edge width on both sides of the Band thickness determining middle range at least 45%, preferably 50 to 80% of the total width of the tape.
  • the thickness of the tape advantageously used according to the invention Polytetrafluoroethylene is 20 to 200 microns, preferably 40 to 160 microns.
  • the strip thickness decreases to 5 ⁇ m and less towards the edges. Doing so the bandwidth is expediently 5 to 50 mm, preferably 10 to 30 mm.
  • the outer protective jacket made of a wound Band consists of polytetrafluoroethylene.
  • Polytetrafluorethylene is a shock absorbing insulating layer made from a To arrange melt processable fluoropolymer.
  • Another beneficial one Embodiment of the invention would be the one or both sides of the protective conductor a shock-absorbing insulating layer made of a melt-processable To allow fluoropolymer to border, the protective conductor with these insulating layers include.
  • the invention is based on that shown in FIGS. 1 and 2 as particularly advantageous Embodiments of electrical heating cables in a coaxial arrangement closer explained.
  • the conductor is made 1, as shown in Figure 1, for example from a number of individual Resistance wires.
  • the conductor insulation is labeled 2, it consists of a high temperature resistant polytetrafluoroethylene, the name "Polytetrafluoroethylene", as also above, such tetrafluoroethylene polymers includes that are provided with modifying additives, but in one Quantity that the polymer, like the PTFE itself, does not melt is processable.
  • the one used is Polytetrafluoroethylene from an initially unsintered strip or foil material, the wound in the unsintered state on the heating conductor, preferably with Overlap, for example up to 50%, and in the wound state an appropriate temperature treatment is sintered.
  • the individual band layers are fused or welded into compact insulation.
  • the protective conductor 3 consists of individual metallic wires, for example nickel-plated copper wires that are roped on the insulation 2 or for achieving as far as possible over the circumference are.
  • the heating line is closed by the jacket 4, the Appropriate, since such lines are also in the area of influence of aggressive media be used, for example in the chemical industry, from a corresponding suitable plastic material is made.
  • sheath materials have Fluoropolymers have also been found to be advantageous in extruded form be applied, or in that a winding from initially unsintered and wound sintered PTFE tapes forms the outer end of the heating cable.
  • This Layer of an extrudable fluoropolymer amorphous according to the invention dampens the impact energy applied from the outside and thus prevents one Cable damage or destruction.
  • FIG. 2 shows a particularly advantageous embodiment of the invention
  • Heating line again in a coaxial version, consists of the heating conductor 6, for example, from a large number of individual strands that are stranded or intertwined Resistance wires.
  • the conductor insulation is designated 7, it consists in present embodiment of one or more layers of a tape made of polytetrafluoroethylene (PTFE).
  • PTFE polytetrafluoroethylene
  • the shock absorbing layer 8 from a melt processable fluoropolymer.
  • This layer covers conductor 6 directly, because of the smaller in relation to the diameter of the line Conductor diameter, the wall thickness of the layer 8 can be kept extremely thin become.
  • the heating line according to the invention therefore fulfills all Safety requirements, especially those for explosion protection.
  • this heating line according to the invention is inexpensive to manufacture, in some cases partly because of the simplified work steps compared to the prior art because of the smaller amounts of material, the same polymer family are to be assigned.
  • the outer jacket 10 also consists of a in this embodiment Winding from PTFE tapes, in the wound state Subjected to temperature treatment and thus to a compact coating welded or fused.
  • the special provided according to the invention Cross-sectional shape of the PTFE tape leads to a particularly smooth, in itself closed surface. Tearing open the individual layers of tape under impact or impact stress is a shock due to the solution according to the invention absorbent polymer layer from the same polymer family in the layer structure to arrange the heating cable avoided.
  • the heating line according to the invention shown in Figure 2 is also characterized by particularly favorable external dimensions.
  • the diameter of the conductor 6 is 1.4 mm
  • the wall thickness of the shock-absorbing layer 8 is 0.2 mm
  • the insulation 7 has a wall thickness of 0.6 mm
  • the thickness of the braid 9 is 0, 4 mm
  • the jacket 10 has a wall thickness of 0.5 mm.
  • insulating layers made of PTFE and PFA can alternate in the layer structure of the heating cable, for example PTFE / PFA / PTFE or also PFA / PTFE / PFA.
  • the prerequisite here is that these insulating layers each adjoin one another.
  • the effect of the invention can also be achieved if different from the Embodiments known heating cables or heating lines, too in embodiments deviating from the coaxial construction, against impact and pressure loads are to be strengthened and the PTFE coatings used there according to the invention insulating layers from the melt adjacent processible fluoropolymers.

Landscapes

  • Insulated Conductors (AREA)
  • Resistance Heating (AREA)
  • Communication Cables (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
EP04010990A 2003-06-05 2004-05-08 Câble chauffant électrique ou ruban chauffant électrique Expired - Lifetime EP1484945B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10325517A DE10325517A1 (de) 2003-06-05 2003-06-05 Elektrische Heizleitung oder Heizband
DE10325517 2003-06-05

Publications (2)

Publication Number Publication Date
EP1484945A1 true EP1484945A1 (fr) 2004-12-08
EP1484945B1 EP1484945B1 (fr) 2006-04-26

Family

ID=33154563

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04010990A Expired - Lifetime EP1484945B1 (fr) 2003-06-05 2004-05-08 Câble chauffant électrique ou ruban chauffant électrique

Country Status (7)

Country Link
US (1) US7220916B2 (fr)
EP (1) EP1484945B1 (fr)
AT (1) ATE324765T1 (fr)
CA (1) CA2469775A1 (fr)
DE (2) DE10325517A1 (fr)
NO (1) NO20042302L (fr)
RU (1) RU2342807C2 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007147271A1 (fr) * 2006-06-19 2007-12-27 Huber+Suhner Ag Composant haute fréquence et procédé de fabrication d'un tel composant
FR3028592A1 (fr) * 2014-11-18 2016-05-20 Itp Sa Conduit de transport d'un fluide chauffe electriquement
US9464747B2 (en) 2011-05-20 2016-10-11 Norma Germany Gmbh Connector for a heatable fluid line and heatable fluid line
US9506595B2 (en) 2011-05-20 2016-11-29 Norma Germany Gmbh Fluid line
US9671053B2 (en) 2011-05-20 2017-06-06 Norma Germany Gmbh Fluid line

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JP5040234B2 (ja) * 2006-09-26 2012-10-03 三菱電機株式会社 圧接型半導体装置
US20080271919A1 (en) * 2007-05-01 2008-11-06 Elko Joe Bundled composite cable with no outer over-jacket
CN102912515A (zh) * 2008-05-28 2013-02-06 瑟尔瑞株式会社 导电垫
DE102008051865A1 (de) * 2008-10-16 2010-04-22 Baisch, Wolfram G. Dachelement und Dachelementsystem
JP2010135205A (ja) * 2008-12-05 2010-06-17 Hitachi Cable Ltd 同軸ケーブル及びその製造方法
US20110008600A1 (en) * 2008-12-29 2011-01-13 Walsh Edward D Chemical barrier lamination and method
JP2010160970A (ja) * 2009-01-08 2010-07-22 Hitachi Cable Ltd 同軸ケーブル
RU2396622C1 (ru) * 2009-07-06 2010-08-10 Государственное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный технологический институт (технический университет)" Способ гидро- и механозащиты высоковольтных керамических изоляторов
RU2413318C1 (ru) * 2009-10-15 2011-02-27 Федеральное государственное унитарное предприятие "Особое конструкторское бюро кабельной промышленности" Высокочастотный коаксиальный кабель
CA2793627C (fr) * 2010-04-09 2019-06-11 Ronald Marshall Bass Blocs isolants et procedes pour installation dans des elements chauffants a conducteur isole
RU2449395C1 (ru) * 2010-12-17 2012-04-27 Открытое акционерное общество "Особое конструкторское бюро кабельной промышленности" Высокочастотный огнестойкий коаксиальный кабель
FR2979032B1 (fr) * 2011-08-09 2013-07-26 Nexans Cable electrique resistant aux decharges partielles
US9194251B2 (en) * 2012-08-10 2015-11-24 United Technologies Corporation Duct damper
US9496070B2 (en) * 2013-01-09 2016-11-15 Tyco Electronics Corporation Multi-layer insulated conductor having improved scrape abrasion resistance
DE102014102353A1 (de) * 2014-02-24 2015-08-27 Norma Germany Gmbh Beheizbare Fluidleitung und Verbinder für eine beheizbare Fluidleitung
US9881715B2 (en) 2014-08-21 2018-01-30 Trent Jason Pederson Heated extension cord
KR102212356B1 (ko) 2016-01-28 2021-02-03 로저스코포레이션 플루오로폴리머 복합 필름 래핑된 와이어들 및 케이블들
RU170628U1 (ru) * 2016-12-06 2017-05-03 Общество с ограниченной ответственностью "Кабель Технологии Инновации" Кабель шахтный с оболочками, не содержащими галогенов
DE102018100731A1 (de) * 2018-01-15 2019-07-18 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Temperieren eines Ladekabels für eine Schnellladestation für Fahrzeuge mit elektrischem Antrieb
CN109192370A (zh) * 2018-09-11 2019-01-11 台山市电缆厂有限责任公司 一种聚氯乙烯绝缘电缆
CN109887682A (zh) * 2019-01-29 2019-06-14 芜湖航天特种电缆厂股份有限公司 航空航天用超柔软电线电缆及其制备方法
CN112309635A (zh) * 2020-10-09 2021-02-02 滁州润翰微波科技有限公司 一种防止线缆介质收缩的电缆绕包工艺
DE102021210186A1 (de) * 2021-09-15 2023-03-16 Robert Bosch Gesellschaft mit beschränkter Haftung Heizdrahtvorrichtung und Verfahren zum Herstellen einer Heizdrahtvorrichtung

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DE3233904A1 (de) * 1982-09-13 1984-03-15 HEW-Kabel Heinz Eilentropp KG, 5272 Wipperfürth Flexibles elektrisches heiz- oder temperaturmessband
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US5061823A (en) * 1990-07-13 1991-10-29 W. L. Gore & Associates, Inc. Crush-resistant coaxial transmission line
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DE20006222U1 (de) * 2000-04-06 2000-07-27 Hemstedt, Dieter, 74336 Brackenheim Elektrische Heizleitung
US20020062984A1 (en) * 2000-11-21 2002-05-30 Wolfgang Dlugas Electrical cable

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SE433999B (sv) * 1982-11-12 1984-06-25 Wolfgang Bronnvall Sjelvbegrensande elektrisk uppvermningsanordning och elektriskt motstandsmaterial
DE3636738A1 (de) * 1986-10-29 1988-05-05 Eilentropp Hew Kabel Ablaengbares flexibles elektrisches heizelement
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US6144018A (en) * 1993-02-08 2000-11-07 Heizer; Glenwood Franklin Heating cable
DE19918539A1 (de) * 1999-04-23 2000-10-26 Eilentropp Kg Koaxiales Hochfrequenzkabel
WO2002056638A1 (fr) * 2001-01-09 2002-07-18 Tsuneji Sasaki Procede d'isolation d'un filament de carbone et procede pour former un cable coaxial avec un filament de carbone et un conducteur electrique
DE10107429B4 (de) * 2001-02-16 2005-09-29 Thermon Europe B.V. Heizkabel mit Mehrschichtaufbau
RU20697U1 (ru) * 2001-05-28 2001-11-20 Открытое акционерное общество "Камкабель" Электронагревательный кабель

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2850722A1 (de) * 1978-11-23 1980-05-29 Pampus Kg Elektrisches heizelement mit schutzleiter fuer aggressive baeder
DE3233904A1 (de) * 1982-09-13 1984-03-15 HEW-Kabel Heinz Eilentropp KG, 5272 Wipperfürth Flexibles elektrisches heiz- oder temperaturmessband
DE3243061A1 (de) * 1982-11-22 1984-05-24 HEW-Kabel Heinz Eilentropp KG, 5272 Wipperfürth Flexibles elektrisches ablaengbares heizelement
US5061823A (en) * 1990-07-13 1991-10-29 W. L. Gore & Associates, Inc. Crush-resistant coaxial transmission line
US5558794A (en) * 1991-08-02 1996-09-24 Jansens; Peter J. Coaxial heating cable with ground shield
DE20006222U1 (de) * 2000-04-06 2000-07-27 Hemstedt, Dieter, 74336 Brackenheim Elektrische Heizleitung
US20020062984A1 (en) * 2000-11-21 2002-05-30 Wolfgang Dlugas Electrical cable

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007147271A1 (fr) * 2006-06-19 2007-12-27 Huber+Suhner Ag Composant haute fréquence et procédé de fabrication d'un tel composant
US9464747B2 (en) 2011-05-20 2016-10-11 Norma Germany Gmbh Connector for a heatable fluid line and heatable fluid line
US9506595B2 (en) 2011-05-20 2016-11-29 Norma Germany Gmbh Fluid line
US9671053B2 (en) 2011-05-20 2017-06-06 Norma Germany Gmbh Fluid line
FR3028592A1 (fr) * 2014-11-18 2016-05-20 Itp Sa Conduit de transport d'un fluide chauffe electriquement

Also Published As

Publication number Publication date
DE10325517A1 (de) 2004-12-23
US7220916B2 (en) 2007-05-22
RU2342807C2 (ru) 2008-12-27
DE502004000457D1 (de) 2006-06-01
RU2004130929A (ru) 2006-04-10
ATE324765T1 (de) 2006-05-15
NO20042302L (no) 2004-12-06
EP1484945B1 (fr) 2006-04-26
CA2469775A1 (fr) 2004-12-05
US20050016757A1 (en) 2005-01-27

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