EP0609771B1 - Elektrische Heizleitung - Google Patents
Elektrische Heizleitung Download PDFInfo
- Publication number
- EP0609771B1 EP0609771B1 EP94101175A EP94101175A EP0609771B1 EP 0609771 B1 EP0609771 B1 EP 0609771B1 EP 94101175 A EP94101175 A EP 94101175A EP 94101175 A EP94101175 A EP 94101175A EP 0609771 B1 EP0609771 B1 EP 0609771B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- protective conductor
- conductor
- film
- cable according
- insulation
- 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.)
- Revoked
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 28
- 239000004020 conductor Substances 0.000 claims abstract description 40
- 230000001681 protective effect Effects 0.000 claims abstract description 27
- 238000009413 insulation Methods 0.000 claims abstract description 22
- 239000004033 plastic Substances 0.000 claims abstract description 19
- 229920003023 plastic Polymers 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 17
- 229920002313 fluoropolymer Polymers 0.000 claims description 8
- 239000004811 fluoropolymer Substances 0.000 claims description 7
- 239000004642 Polyimide Substances 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 229920001643 poly(ether ketone) Polymers 0.000 claims description 2
- 238000004804 winding Methods 0.000 description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 238000009954 braiding Methods 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229920000271 Kevlar® Polymers 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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 cable with an electrical protective conductor covering the conductor insulation made of high-temperature-resistant materials in the form of stranded or braided individual wires.
- Heating lines in a coaxial arrangement are known for the most varied fields of application, for example also for heating aggressive media (DE-A 28 50 722), in which the heating conductor is enclosed by a fluoropolymer as an insulating material.
- This insulation is covered by a copper wire mesh, whereby the individual wires are additionally nickel-plated to avoid corrosion.
- This braid made of copper wires is the electrical protective conductor of the line, which is provided within the line to avoid the risk of accidents, for example due to a short circuit in the electrically conductive part.
- the protective conductor is covered by an outer plastic sheath, which is used to protect against aggressive media in the area.
- B. is made of a fluoropolymer.
- the object of the invention is to provide adequate protection of the conductor insulation, even with the greatest mechanical force from impact or crushing loads.
- a band-shaped film made of mechanically high-strength plastics is wound underneath and / or above the protective conductor in one or more closed layers.
- This film wrapping in one form or another leads to the fact that, in the event of an external impact or squeezing effect on the heating line, the film material is only stretched at the locally limited point, or even springs back when the stress has ended.
- the present invention is of particular importance with regard to the test standard provided for such cables, according to which such heating cables are subjected to a local load with a 6 mm diameter mandrel under a load of 1500 N for 30 seconds. Due to the resilient properties of the film winding provided according to the invention, such a line satisfies the standard requirement without any problems; it is therefore also suitable for use in explosion-prone plants and systems with the specified safety factor.
- the band-shaped film can be arranged below, above or on both sides of the protective conductor.
- a particularly preferred embodiment of the invention is that of arranging the band-shaped film below the protective conductor; it thus offers reliable protection of the insulation after a break in the wires of the protective conductor against the winding on both sides it provides a particularly inexpensive solution to the problem on which the invention is based.
- the band-shaped film is wound, that it consists of a high-strength plastic material and that the winding is a closed layer, so that forces acting in a point-like manner from the outside can be absorbed over the entire circumference of the heating line.
- High-strength plastic materials are known, for the purposes of the invention, for. B. plastics based on polyimides or their derivatives have proven to be advantageous. However, such plastics based on polyether ketones and their derivatives are also suitable for achieving the object on which the invention is based.
- the band-shaped film is coated on one or both sides.
- This coating suitably also consists of a fluoropolymer.
- the protective conductor itself can, as already stated, consist of stranded or braided individual wires; a so-called mixed braid of metallic wires and high-tensile plastic threads can be used advantageously as braiding.
- the conductor 1 consists, for example, of a number of individual resistance heating wires.
- the insulation is denoted by 2, it consists of a high-temperature-resistant material, for example based on a fluoropolymer, which is applied by extrusion, or, if the fluoropolymer is a polytetrafluoroethylene, consists of a film material which is applied in the unsintered state and is sintered in the wound state by an appropriate temperature treatment, so that the individual strip layers fuse to form a compact insulation.
- a protective conductor 3 is provided, and finally an outer jacket 4, which is expedient, since such lines are also used in the area of influence of aggressive media, for example in the chemical industry, made from a suitable plastic material .
- Flame-resistant properties are also often required, resistance to elevated temperatures and good mechanical properties.
- Fluoropolymers which have been found in Extruded form are applied or in that the line is banded with tape-shaped films used from the same materials in one or more layers. These materials are of course only a selection of known materials suitable for the purposes of the invention.
- a film winding 5 is provided above the insulation 2, which is applied in one or more closed layers and consists of a mechanically high-strength plastic, for example polyimide.
- FIG. 2 shows a variant of the invention that differs from FIG. 1.
- the heating conductor itself here designated 6, advantageously consists of individual resistance heating wires to increase the flexibility of the line.
- the insulation 7 is made from high-temperature-resistant plastics, for example from fluorine-based ones, above which the winding 8 according to the invention is made from a closed position, that is to say overlapping tapes made from mechanically high-strength plastics, as are known, for example, under the trade name KAPTON®.
- the protective conductor required for such heating cables is designated 9; Achievement of a wide, extensive coverage from a rope from a variety of individual copper wires, the z. B. are additionally coated with a metallic material to avoid corrosion.
- high-tensile and temperature-resistant threads or strands 10 which, in the exemplary embodiment shown, run above and along the distance 12 below the wire layer of the protective conductor 9, which is concentric with the heating conductor 6, due to the braiding along the section 11.
- this braiding of the high-tensile strands 10 for example of threads based on polyaramide, as are known under the trade name KEVLAR®, ensures that the individual wires of the protective conductor are securely fixed in the cable structure even under high bending stress, these strands are associated with The closed film layer underneath or also above further helps to keep external mechanical forces away from the insulation in the event of impact or crushing stresses on the line and thus also to ensure the operability of the heating line in such cases.
Landscapes
- Insulated Conductors (AREA)
- Resistance Heating (AREA)
- Communication Cables (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
- Medicines Containing Plant Substances (AREA)
- Massaging Devices (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4302695 | 1993-02-01 | ||
DE4302695A DE4302695A1 (de) | 1993-02-01 | 1993-02-01 | Elektrische Heizung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0609771A1 EP0609771A1 (de) | 1994-08-10 |
EP0609771B1 true EP0609771B1 (de) | 1997-07-16 |
Family
ID=6479328
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94101175A Revoked EP0609771B1 (de) | 1993-02-01 | 1994-01-27 | Elektrische Heizleitung |
Country Status (6)
Country | Link |
---|---|
US (1) | US5521358A (fi) |
EP (1) | EP0609771B1 (fi) |
AT (1) | ATE155635T1 (fi) |
DE (2) | DE4302695A1 (fi) |
FI (1) | FI108329B (fi) |
NO (1) | NO940323L (fi) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10325517A1 (de) * | 2003-06-05 | 2004-12-23 | Hew-Kabel/Cdt Gmbh & Co. Kg | Elektrische Heizleitung oder Heizband |
CN103415097A (zh) * | 2013-08-12 | 2013-11-27 | 芜湖市恒鑫电缆有限责任公司 | 地下车库坡道化雪防滑专用发热电缆 |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6153856A (en) * | 1997-01-21 | 2000-11-28 | Lee; Myoung Jun | Low magnetic field emitting electric blanket |
US6226450B1 (en) | 1997-01-21 | 2001-05-01 | Myoung Jun Lee | Electric field shielding apparatus |
US6300597B1 (en) | 1997-01-21 | 2001-10-09 | Myoung Jun Lee | Electromagnetic field shielding electric heating pad |
US5910266A (en) * | 1997-05-28 | 1999-06-08 | The B.F. Goodrich Company | Helical electrical heater |
US6002117A (en) * | 1998-03-10 | 1999-12-14 | Pak; Il Young | Electric heating cord with non-heating core-conducting element and reduced EMF emissions |
US6137084A (en) * | 1998-10-07 | 2000-10-24 | Thomas; Paul Douglas | Heating element for heated windshield wiper |
KR20000028327A (ko) * | 1998-10-31 | 2000-05-25 | 양건호 | 전자파를 제거한 면상 발열체 및 그 제조방법 |
DE19851920A1 (de) * | 1998-11-11 | 2000-05-18 | Eilentropp Kg | Elektrisches Heizkabel |
DE19858137B4 (de) * | 1998-12-16 | 2016-12-15 | BSH Hausgeräte GmbH | Heizung zum Erwärmen der Spülflüssigkeit in einer Geschirrspülmaschine |
US6288372B1 (en) | 1999-11-03 | 2001-09-11 | Tyco Electronics Corporation | Electric cable having braidless polymeric ground plane providing fault detection |
DE10101378C2 (de) * | 2000-06-07 | 2003-04-03 | Dan Klein | Einrichtung zur Ableitung von Strömen |
DE10110185B9 (de) * | 2001-03-02 | 2013-05-02 | Eichenauer Heizelemente Gmbh & Co. Kg | Beheizbares Dehnstoffelement |
US7223948B2 (en) * | 2002-11-15 | 2007-05-29 | W.E.T. Automotive Systems Ag | Covered conductor and heater formed therewith |
JP4055125B2 (ja) * | 2002-12-24 | 2008-03-05 | 日本光電工業株式会社 | 同軸ケーブルおよびそれを用いた伝送トランス |
US20060218778A1 (en) * | 2005-04-04 | 2006-10-05 | Govindaraj Jawahar | Flexible conducting thread |
US7220947B2 (en) * | 2005-09-30 | 2007-05-22 | Global Heating Solutions, Inc. | Pipe heater |
DE102006025269A1 (de) * | 2006-05-31 | 2007-12-06 | Nexans | Flexible elektrische Leitung |
JP5874384B2 (ja) * | 2011-01-07 | 2016-03-02 | 日立金属株式会社 | ケーブル |
US9706605B2 (en) * | 2012-03-30 | 2017-07-11 | Applied Materials, Inc. | Substrate support with feedthrough structure |
CN103411252A (zh) * | 2013-08-07 | 2013-11-27 | 芜湖市恒鑫电缆有限责任公司 | 耐温发热网席 |
CN104185322A (zh) * | 2014-09-09 | 2014-12-03 | 芜湖市恒鑫电缆有限责任公司 | 一种安全地热发热电缆 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4617449A (en) * | 1981-10-22 | 1986-10-14 | Ricwil, Incorporated | Heating device for utilizing the skin effect of alternating current |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1175784A (fr) * | 1956-05-25 | 1959-04-01 | Thomson Houston Comp Francaise | Câble électrique chauffant à gaine extérieure non métallique |
AT258340B (de) * | 1963-05-31 | 1967-11-27 | Benno Palatini | Einrichtung zum elektrischen Beheizen flächenhafter Beläge |
DE1540897A1 (de) * | 1965-10-25 | 1970-01-02 | Eugen Kloepper Waermetechnik G | Heizkabel mit Schutzleiter |
US3859506A (en) * | 1973-06-15 | 1975-01-07 | Sola Basic Ind Inc | Constant wattage heating element |
DE2647056C3 (de) * | 1976-10-19 | 1980-09-04 | Felten & Guilleaume Carlswerk Ag, 5000 Koeln | Biegsame, elektrische Heizleitung zur Bildung von Heizelementen, insbesondere Heizmatten |
DE2850722A1 (de) * | 1978-11-23 | 1980-05-29 | Pampus Kg | Elektrisches heizelement mit schutzleiter fuer aggressive baeder |
US4273829A (en) * | 1979-08-30 | 1981-06-16 | Champlain Cable Corporation | Insulation system for wire and cable |
US4436569A (en) * | 1981-09-21 | 1984-03-13 | The United States Of America As Represented By The Secretary Of The Navy | Method for forming a protective cover for aircraft having conical radomes |
US4521485A (en) * | 1982-09-15 | 1985-06-04 | Raychem Corporation | Electrical insulation |
DE8435742U1 (de) * | 1984-12-06 | 1985-04-04 | Schmidt, Hans, 5165 Hürtgenwald | Elektrische heizleitung |
US4551619A (en) * | 1985-01-22 | 1985-11-05 | Lefebvre Fredrick L | Cable structure for immersion heaters or the like |
US4851060A (en) * | 1987-08-12 | 1989-07-25 | Essex Group, Inc. | Multilayer wrapped insulated magnet wire |
US5245161A (en) * | 1990-08-31 | 1993-09-14 | Tokyo Kogyo Boyeki Shokai, Ltd. | Electric heater |
US5138684A (en) * | 1991-01-14 | 1992-08-11 | W. L. Gore & Associates, Inc. | High-strength isolated core cable |
US5237635A (en) * | 1992-07-15 | 1993-08-17 | W. L. Gore & Associates, Inc. | Signal cable having metal-plated polymer shielding |
US5374782A (en) * | 1993-07-01 | 1994-12-20 | Taylor; John A. | Stranded annular conductors |
-
1993
- 1993-02-01 DE DE4302695A patent/DE4302695A1/de not_active Ceased
-
1994
- 1994-01-27 EP EP94101175A patent/EP0609771B1/de not_active Revoked
- 1994-01-27 AT AT94101175T patent/ATE155635T1/de active
- 1994-01-27 DE DE59403333T patent/DE59403333D1/de not_active Revoked
- 1994-01-31 US US08/189,437 patent/US5521358A/en not_active Expired - Fee Related
- 1994-01-31 NO NO940323A patent/NO940323L/no not_active Application Discontinuation
- 1994-02-01 FI FI940470A patent/FI108329B/fi not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4617449A (en) * | 1981-10-22 | 1986-10-14 | Ricwil, Incorporated | Heating device for utilizing the skin effect of alternating current |
Non-Patent Citations (1)
Title |
---|
FRANK A., BIEDERBICK K.: "Kunststoff-Kompendium", VOGEL, WUERZBURG * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10325517A1 (de) * | 2003-06-05 | 2004-12-23 | Hew-Kabel/Cdt Gmbh & Co. Kg | Elektrische Heizleitung oder Heizband |
US7220916B2 (en) | 2003-06-05 | 2007-05-22 | Hew-Kabel/Cdt Gmbh & Co: Kg | Electric heating cable or tape having insulating sheaths that are arranged in a layered structure |
CN103415097A (zh) * | 2013-08-12 | 2013-11-27 | 芜湖市恒鑫电缆有限责任公司 | 地下车库坡道化雪防滑专用发热电缆 |
Also Published As
Publication number | Publication date |
---|---|
NO940323L (no) | 1994-08-02 |
NO940323D0 (no) | 1994-01-31 |
FI940470A (fi) | 1994-08-02 |
DE59403333D1 (de) | 1997-08-21 |
US5521358A (en) | 1996-05-28 |
DE4302695A1 (de) | 1994-08-04 |
FI108329B (fi) | 2001-12-31 |
EP0609771A1 (de) | 1994-08-10 |
ATE155635T1 (de) | 1997-08-15 |
FI940470A0 (fi) | 1994-02-01 |
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