CN107105529B - Carbon fiber heating cable - Google Patents
Carbon fiber heating cable Download PDFInfo
- Publication number
- CN107105529B CN107105529B CN201710336496.3A CN201710336496A CN107105529B CN 107105529 B CN107105529 B CN 107105529B CN 201710336496 A CN201710336496 A CN 201710336496A CN 107105529 B CN107105529 B CN 107105529B
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- Prior art keywords
- carbon fiber
- fiber heating
- heating element
- cable
- section
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 129
- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 101
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 101
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 100
- 230000016507 interphase Effects 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 239000000835 fiber Substances 0.000 claims 1
- 239000004020 conductor Substances 0.000 description 9
- 238000005485 electric heating Methods 0.000 description 6
- 238000004321 preservation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910001006 Constantan Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 239000011224 oxide ceramic Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910021483 silicon-carbon alloy Inorganic materials 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 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
-
- 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
- H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
-
- 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
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/02—Heaters using heating elements having a positive temperature coefficient
Landscapes
- Resistance Heating (AREA)
Abstract
A carbon fiber heating cable comprising: the cable core is connected with the power supply lead and is used for transmitting electric energy; the carbon fiber layer comprises a plurality of carbon fiber heating bodies which are spirally wound along the conductive cable core; a plurality of conductive bands which electrically connect the carbon fiber heating element positioned between two adjacent conductive bands with different cable cores to form an interphase resistor; the diameter of a specific carbon fiber heating element in the plurality of carbon fiber heating elements is larger than that of the rest carbon fiber heating elements, so that the resistance value of the specific carbon fiber heating element is smaller than half of the resistance values of the rest carbon fiber heating elements; the axial distance between different conductive belts is increased in sequence, so that the resistance value of the same carbon fiber heating body along the axial interphase resistor is increased in sequence.
Description
Technical Field
The invention relates to an electric heating device, in particular to a novel heating cable.
Background
At present, besides resistance wires, electrothermal films, silicon-carbon alloys, molybdenum, tin oxide ceramics and the like, electric heating elements also use cables as heating elements of electric heating equipment. The heating cable is an electric heating element which is made into a cable structure, takes electric power as energy and utilizes resistance wires to carry out electric heating so as to achieve the effect of heating or heat preservation.
Compared with other electric heating modes, the heating cable has the advantages of high heat efficiency, energy conservation, simple design, convenient installation, no pollution, long service life, capability of realizing remote control and automatic control and the like, so that the heating cable is gradually applied to popularization and application in China. The heating cable is used for heat preservation and freeze prevention of oil and water pipelines, tank bodies and equipment besides common household heating; heat preservation and heat tracing of a domestic hot water system; snow and ice melting for outdoor facilities such as roads and roofs; soil (lawn, green land, flower house) heat preservation and heating, cultural relic and ancient space protection, and the like.
The heating cable is designed to meet the following requirements: the heating efficiency is high; the safety is good, and no electromagnetic pollution exists; has certain mechanical strength. The existing heating cable mainly adopts metal wires or alloy resistance wires as heating elements, after the heating cable is electrified, the metal wires or the alloy resistance wires of the heating body convert electric energy into heat energy, and the heat energy is transmitted to a heated body in a heat conduction and far infrared radiation mode to achieve the heating or heat preservation effect.
The carbon fiber is a novel material with high temperature resistance, corrosion resistance, fatigue resistance and high strength, and is widely applied to the fields of aerospace, civil construction, architecture, electronic and electrical appliances, medical treatment, cables and the like due to good physical and chemical properties. 201110073117.9 discloses a carbon fiber heating cable, which is formed by disposing a plurality of carbon fiber heating elements spirally wound on an inner conductor, and sequentially connecting the carbon fiber heating elements and two conductors of different phases by using a conductive tape to form an interphase resistor, so that the carbon fibers are used as heating elements, thereby achieving the technical effects of improving heating efficiency and effectively conducting heat. However, in the carbon fiber heating element of the related art, the interphase resistors are connected in parallel, and when the cable temperature is too high, the temperature can be lowered only by cutting off the power supply, which may cause insufficient heating.
In order to solve the above problem, in the prior application of 2015107215460, it is proposed to set the contact position of the conductive tape and the carbon fiber heating bodies so that a minimum resistance smaller than half of the rest of the resistances exists between the carbon fiber conductors, and when the temperature of the heating cable is too high, the control of the temperature of the heating cable can be realized by controlling the resistance value of the minimum resistance section, and the heating of the rest of the interphase resistances is not affected. However, this method requires the provision of a specific conductive tape, and requires a complicated manufacturing flow and process.
Disclosure of Invention
The present invention provides a heating cable which solves the above mentioned drawbacks of the prior art.
As an aspect of the present invention, there is provided a heating cable including: the cable core is connected with the power supply lead and is used for transmitting electric energy; the carbon fiber layer comprises a plurality of carbon fiber heating bodies which are spirally wound along the conductive cable core; a plurality of conductive bands which electrically connect the carbon fiber heating element positioned between two adjacent conductive bands with different cable cores to form an interphase resistor; the diameter of a specific carbon fiber heating body in the plurality of carbon fiber heating bodies is larger than that of the rest carbon fiber heating bodies, so that the resistance value of the specific carbon fiber heating body is smaller than half of the resistance values of the rest carbon fiber heating bodies.
Preferably, the carbon fiber heating elements between two adjacent conductive tapes are equal in length.
Preferably, specific carbon fiber heating element is located the carbon fiber heating element section that faces between two conduction bands and includes three part, first carbon fiber heating element section, second carbon fiber heating element section and fusing section, the fusing section is located in the middle of first carbon fiber heating element section and the second carbon fiber heating element section, works as heating cable's temperature exceeds specific threshold value, the fusing section fuses and makes this carbon fiber heating element section open circuit.
Replaceable, specific carbon fiber heating element is located the carbon fiber heating element section that faces between two conduction bands and includes three part, first carbon fiber heating element section, second carbon fiber heating element section and regulation section, the regulation section is located in the middle of first carbon fiber heating element section and the second carbon fiber heating element section, and it includes positive temperature coefficient's resistance material, works as heating cable's temperature exceeds specific threshold value, the resistance of regulation section appears the increase of rank more to reduce heating cable's heat.
As another aspect of the present invention, there is provided a heating cable including: the cable core is connected with the power supply lead and is used for transmitting electric energy; the carbon fiber layer comprises a plurality of carbon fiber heating bodies which are spirally wound along the conductive cable core; a plurality of conductive bands which electrically connect the carbon fiber heating element positioned between two adjacent conductive bands with different cable cores to form an interphase resistor; the method is characterized in that: the diameter of a specific carbon fiber heating element in the plurality of carbon fiber heating elements is larger than that of the rest carbon fiber heating elements, so that the resistance value of the specific carbon fiber heating element is smaller than half of the resistance values of the rest carbon fiber heating elements; the axial distance between different conductive belts is increased in sequence, so that the resistance value of the same carbon fiber heating body along the axial interphase resistor is increased in sequence.
Preferably, the carbon fiber heating elements between two adjacent conductive tapes are equal in length.
Preferably, it is characterized in that: the specific carbon fiber heating element is located the carbon fiber heating element section that faces between two conduction bands mutually and includes three part, first carbon fiber heating element section, second carbon fiber heating element section and regulation section, the regulation section is located in the middle of first carbon fiber heating element section and the second carbon fiber heating element section, and it includes positive temperature coefficient's resistance material, works as heating cable's temperature surpasss the regulation temperature threshold value, the increase more in order appears in the resistance of regulation section to reduce heating cable's heat.
Preferably, the adjustment segments are arranged such that the adjustment temperature threshold of each adjustment segment along the axial direction increases in sequence.
Preferably, the conductive cable core uses nichrome, constantan or copper wire as a conductor.
Preferably, an inner insulating layer is arranged outside the electric conductor.
Preferably, the cable further comprises a sheath layer arranged at the outermost edge.
Drawings
Fig. 1 is a schematic view of the structure of the heating cable of the present invention.
Fig. 2 is a circuit diagram corresponding to the inter-phase resistance according to an embodiment of the present invention.
Fig. 3 is a circuit diagram corresponding to the phase-to-phase resistance with the adjustment section of the present invention.
Fig. 4 is a circuit diagram corresponding to the inter-phase resistance according to another embodiment of the present invention.
In order to more clearly illustrate the technical solutions of the present invention, the present invention will be briefly described below by using embodiments, and it is obvious that the following description is only one embodiment of the present invention, and for those skilled in the art, other technical solutions can be obtained according to the embodiments without inventive labor, and also fall within the disclosure of the present invention.
The heating cable of the embodiment of the invention, referring to fig. 1, comprises a sheath layer 1, an electric conductor 2, an inner insulating layer 3, a plurality of carbon fiber heating bodies and a plurality of conductive strips 7. The sheath layer 1 is located on the outermost layer of the heating cable and used for protecting the whole heating cable, and a high-density polyethylene outer sheath can be used.
The electrical conductor 2 and the inner insulating layer 3 form a conductive core 4 which is connected to a power supply for delivering electrical energy, in this embodiment a two-phase power supply is used as the power supply for the heating cable. The conductor 2 uses constantan or copper wire as conductor, and the inner insulating layer uses mica tape as insulating material.
In the embodiment of fig. 1, two carbon fiber heating bodies 5 and 6 are used as heat-generating materials, which are electrically connected to different cable cores via conductive tapes 7 to form interphase resistance. The projection of the conductive belt 7 on the longitudinal section of the heating cable is a straight line, is sequentially and alternately electrically connected with each phase of the two-phase power supply and is respectively and electrically connected with the carbon fiber heating bodies 5 and 6, so that a loop is formed between the power supply and each section of the carbon fiber heating bodies 5 and 6.
The diameter of the carbon fiber heating element 5 is larger than that of the carbon fiber heating element 6, so that the resistance of the carbon fiber heating element 5 in unit length is smaller than that of the carbon fiber heating element 6. Preferably, the carbon fiber heating element 5 is set to have a diameter with a resistance per unit length smaller than half of that of the carbon fiber heating element 6.
Referring to fig. 2, the interphase resistances of the carbon fiber heating body 5 between the two conductive tapes 7 are 10, 12, which are smaller than the interphase resistances 11, 13 of the carbon fiber heating body 6 between the two conductive tapes 7. Through the arrangement, the resistance of the carbon fiber heating body 5 in each section of the conductive belt can be half of that of the rest of the resistors without specially arranging the conductive belt 7, when the temperature of the heating cable is too high, the resistance value of the minimum resistance section is controlled, the resistance is increased or the resistance is broken, the temperature of the heating cable can be controlled, and the heating of the rest of the interphase resistors cannot be influenced.
The specific carbon fiber heater section corresponding to the phase resistors 10 and 12 may be configured to include three parts, a first carbon fiber heater section, a second carbon fiber heater section, and a fusing section, the fusing section being located between the first carbon fiber heater section and the second carbon fiber heater section, and fusing the fusing section to open the carbon fiber heater section when the temperature of the heating cable exceeds a specific threshold.
Preferably, as shown in fig. 3, a specific carbon fiber heater section of the carbon fiber heating body 5 corresponding to the interphase resistors 10 and 12 may be provided to include three parts, a first carbon fiber heater section, a second carbon fiber heater section, and adjusting sections 14 and 15, the adjusting sections 14 and 15 are located between the first carbon fiber heater section and the second carbon fiber heater section, and include a resistance material with a positive temperature coefficient, when the temperature of the heating cable exceeds a specific adjusting threshold, the resistance of the adjusting sections 14 and 15 increases more and more, so as to reduce the heat of the heating cable, and preferably, the resistance value after increasing is higher than the resistance values of the interphase resistors 10 and 12 by an order of magnitude. Preferably, different positive temperature coefficient of resistance materials are used for the adjustment sections 14 and 15, so that the corresponding specific adjustment thresholds are different, thereby allowing different temperature adjustments of the heating cable.
Preferably, in an alternative embodiment, the axial distances between the different conductive strips 7 may be sequentially increased, so that the resistance values of the inter-phase resistors of the same carbon fiber heating body along the axial direction are sequentially increased as shown in fig. 4. The resistance material with different specific adjusting threshold values is arranged on the interphase resistors with different resistance values on the carbon fiber heating body 5, so that the interphase resistors with different resistance values can be used for adjusting different temperatures.
The above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (2)
1. A carbon fiber heating cable comprising: the cable core is connected with the power supply lead and is used for transmitting electric energy; the carbon fiber layer comprises a plurality of carbon fiber heating bodies which are spirally wound along the conductive cable core; a plurality of conductive bands which electrically connect the carbon fiber heating element positioned between two adjacent conductive bands with different cable cores to form an interphase resistor; the method is characterized in that: the diameter of a specific carbon fiber heating element in the plurality of carbon fiber heating elements is larger than that of the rest carbon fiber heating elements, so that the resistance value of the specific carbon fiber heating element is smaller than half of the resistance values of the rest carbon fiber heating elements; the axial distance between different conductive belts is increased in sequence, so that the resistance value of the same carbon fiber heating body along the axial interphase resistor is increased in sequence.
2. A carbon fibre heating cable according to claim 1, wherein: the specific carbon fiber heating element is located the carbon fiber heating element section that faces between two conduction bands mutually and includes three part, first carbon fiber heating element section, second carbon fiber heating element section and regulation section, the regulation section is located in the middle of first carbon fiber heating element section and the second carbon fiber heating element section, and it includes positive temperature coefficient's resistance material, works as heating cable's temperature exceeds specific threshold value, the increase of order appears in the resistance of regulation section to reduce heating cable's heat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710336496.3A CN107105529B (en) | 2015-11-14 | 2015-11-14 | Carbon fiber heating cable |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710336496.3A CN107105529B (en) | 2015-11-14 | 2015-11-14 | Carbon fiber heating cable |
| CN201510773817.7A CN105228278B (en) | 2015-11-14 | 2015-11-14 | A kind of novel cable |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510773817.7A Division CN105228278B (en) | 2015-11-14 | 2015-11-14 | A kind of novel cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107105529A CN107105529A (en) | 2017-08-29 |
| CN107105529B true CN107105529B (en) | 2020-07-24 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710336496.3A Active CN107105529B (en) | 2015-11-14 | 2015-11-14 | Carbon fiber heating cable |
| CN201510773817.7A Active CN105228278B (en) | 2015-11-14 | 2015-11-14 | A kind of novel cable |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510773817.7A Active CN105228278B (en) | 2015-11-14 | 2015-11-14 | A kind of novel cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN107105529B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203574880U (en) * | 2013-12-02 | 2014-04-30 | 上海南谊新型装饰材料有限公司 | Multi-core carbon fiber heating cable |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102143619B (en) * | 2011-03-25 | 2013-01-02 | 李季 | Heating cable for oil well |
| CN202261876U (en) * | 2011-09-23 | 2012-05-30 | 潘明清 | Completely conductive bridge type electric heating belt |
| CN103428911A (en) * | 2012-05-17 | 2013-12-04 | 河南科信电缆有限公司 | Energy-saving and heat-emitting carbon fiber cable |
| CN103428913A (en) * | 2012-05-17 | 2013-12-04 | 河南科信电缆有限公司 | Carbon fiber geothermal cable |
| KR20150093558A (en) * | 2014-02-07 | 2015-08-18 | 주식회사 광세로 | Heating line with fire protection function |
-
2015
- 2015-11-14 CN CN201710336496.3A patent/CN107105529B/en active Active
- 2015-11-14 CN CN201510773817.7A patent/CN105228278B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203574880U (en) * | 2013-12-02 | 2014-04-30 | 上海南谊新型装饰材料有限公司 | Multi-core carbon fiber heating cable |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107105529A (en) | 2017-08-29 |
| CN105228278A (en) | 2016-01-06 |
| CN105228278B (en) | 2017-12-08 |
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Effective date of registration: 20200526 Address after: 225800 No.1, Guoxia Road, Guoqiao industrial concentration zone, Xiaji Town, Baoying County, Yangzhou City, Jiangsu Province Applicant after: Jiangsu jieter Long Cable Technology Co Ltd Address before: Yang Qiao Road, Gulou District of Fuzhou city of Fujian Province, No. 50 350108 Applicant before: Huang Yanyun |
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