CN1809224B - Preparation method of core-less carbon fiber spiral coil electrical heating element - Google Patents
Preparation method of core-less carbon fiber spiral coil electrical heating element Download PDFInfo
- Publication number
- CN1809224B CN1809224B CN 200610042069 CN200610042069A CN1809224B CN 1809224 B CN1809224 B CN 1809224B CN 200610042069 CN200610042069 CN 200610042069 CN 200610042069 A CN200610042069 A CN 200610042069A CN 1809224 B CN1809224 B CN 1809224B
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- Prior art keywords
- carbon fiber
- core
- preparation
- molybdenum sheet
- heating element
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 74
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 74
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 74
- 238000010438 heat treatment Methods 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000003960 organic solvent Substances 0.000 claims abstract description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 9
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 42
- 238000005245 sintering Methods 0.000 claims description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 9
- 239000005011 phenolic resin Substances 0.000 claims description 9
- 229920001568 phenolic resin Polymers 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 3
- 230000007306 turnover Effects 0.000 claims description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 230000008520 organization Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 239000002904 solvent Substances 0.000 claims 1
- 238000005485 electric heating Methods 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000003466 welding Methods 0.000 abstract description 2
- 238000004806 packaging method and process Methods 0.000 abstract 1
- 238000003825 pressing Methods 0.000 abstract 1
- 239000003708 ampul Substances 0.000 description 12
- 239000010453 quartz Substances 0.000 description 12
- 230000005855 radiation Effects 0.000 description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 12
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 8
- 238000007731 hot pressing Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000005538 encapsulation Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 239000011733 molybdenum Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 229910001928 zirconium oxide Inorganic materials 0.000 description 2
- 229940043774 zirconium oxide Drugs 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000001722 carbon compounds Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000010512 thermal transition Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
本发明的无芯碳纤维螺旋体电热元件的制备方法，由碳纤维螺旋体和接头两部分组成，在加工制造碳纤维螺旋体时，先将碳纤维浸渍含碳有机溶剂，再以一定螺距缠绕在绝缘支撑芯体上，然后将其在氮气保护炉或真空炉中烧结定型后脱出芯体。接头采用中间有孔的叠压式结构，通过翻折互压并采用点焊封装与碳纤维螺旋体连接，确保接头与无芯碳纤维螺旋体端部接触牢靠。利用本发明可提高碳纤维电热管的结构灵活性，特别适合加工异型加热元件，满足各种高性能高辐射电热辐射管的需求。
The preparation method of the coreless carbon fiber helix electric heating element of the present invention consists of two parts: a carbon fiber helix and a joint. When manufacturing the carbon fiber helix, the carbon fiber is first impregnated with a carbon-containing organic solvent, and then wound on the insulating support core with a certain pitch. Then it is sintered and shaped in a nitrogen protection furnace or a vacuum furnace, and then the core is released. The joint adopts a laminated structure with a hole in the middle. It is connected to the carbon fiber helix by turning over and pressing each other and adopting spot welding packaging to ensure that the joint is firmly in contact with the end of the coreless carbon fiber helix. The invention can improve the structural flexibility of the carbon fiber electric heating tube, is especially suitable for processing special-shaped heating elements, and meets the requirements of various high-performance and high-radiation electric heating radiant tubes.
Description
Technical field
The invention belongs to electroheat equipment heating element field, the heater of the carbon fiber electrically heating tube of particularly civilian heating, electrically heated boilers, low-temperature bake equipment.
Background technology
Electric heating is the heat form that is most widely used, and electric heating element is the critical component of firing equipment.Current application heating element the most widely is resistance wire power supply heating, and because of the heating-up temperature difference, heating element divides three types of high temperature, middle gentle low temperature.Under low-temperature condition, how with resistance wire energising heating, because resistance wire surface temperature height, blackness is little, and sends visible light during heating, and the heat efficiency is low, electric heating element surfaceloadingrate height, and the life-span is short, and particularly the easy oxidation of joint area is disconnected takes off.
Low-temp radiating pipe heating element mainly adopts resistance wire at present, and the outside is equipped with heat resisting steel protective sleeve protective resistance silk, but owing to limit in the resistance wire self character, the heat efficiency transforms lower.
Carbon fiber is originally as the fiber material of carbon content more than 95%, self is near absolute black body, thermal transition efficient and radiation efficiency are high, simultaneously, carbon fiber also has high strength, high-modulus, high temperature resistant, many excellent properties such as corrosion-resistant, if utilize carbon fiber processing and manufacturing electric heating radiant tube to be particularly suitable for civilian heating, fields such as electrically heated boilers, low-temperature bake equipment.Because directly the heating element support strength that is processed into carbon fiber itself is lower, must be wrapped on the insulation support core body and could keep shape, the type electrothermal tube can only be processed into straight tube-like, can't make special-shaped electrothermal tubes such as circle, pyriform, U-shaped, and because when energising, core body is supported in heating earlier, thereby cause thermal response time long, firing rate is slow, the not anti-concussion of jolting, the use field of having limited this electric heating element.
Summary of the invention
The objective of the invention is to improve the configuration flexibility of carbon fiber electric heating tube, satisfy the user demand of various special-shaped electrothermal tubes.
The present invention is by with impregnated carbon fiber carbon containing organic solvent, and after Wrapping formed on the core body, the high temperature sintering typing makes the carbon/carbon compound material core-less carbon fiber spiral coil.Content comprises the proportioning of dipping carbon containing organic solvent, the method for high temperature sintering, and the joint of carbon fiber helicoid connects.Utilize carbon fiber helicoid of the present invention as calandria, can develop the high radiate electric heating radiant tube of high-performance.
The preparation method of core-less carbon fiber spiral coil electrical heating element of the present invention; its key technology is earlier impregnated carbon fiber carbon containing organic solvent; drying the back is wrapped on the insulation support core body with a constant pitch; then it is deviate from core body after sintering typing in nitrogen protection or vacuum furnace; adopt molybdenum sheet-molybdenum rod-molybdenum sheet-molybdenum rod tetrad version in the core-less carbon fiber spiral coil end, press-fit joint.
It is the mixed liquor of liquid phenolic resin and alcohol that the preparation method of core-less carbon fiber spiral coil electrical heating element of the present invention, its key technology are to flood with the carbon containing organic solvent, and proportioning is;
Phenolic resins: 5-35%
Alcohol: 95-65%
The type of furnace that the preparation method of core-less carbon fiber spiral coil electrical heating element of the present invention, its key technology are to fire usefulness is high pure nitrogen protection stove or vacuum furnace.During with the typing of high pure nitrogen protection stove sintering, sintering temperature is 700-1300 ℃, temperature retention time 5-30 minute; When utilizing the typing of vacuum furnace sintering, sintering temperature is 1500-2200 ℃, temperature retention time 3-10 minute.
The preparation method of core-less carbon fiber spiral coil electrical heating element of the present invention, its key technology is that adopting sequential organization with the core-less carbon fiber spiral coil electrical heating element blank area is the tetrad structure of molybdenum sheet 4-molybdenum rod 3-molybdenum sheet 2-molybdenum rod 1, wherein molybdenum sheet 4 connects carbon fiber helicoid, molybdenum sheet 4 is middle laminated type structure with holes, during connection molybdenum sheet 4 turnovers are pressed mutually, edge electricity consumption sealing dress, this design feature guarantees that molybdenum sheet contacts well with the core-less carbon fiber spiral coil end.
Description of drawings
Structure of the present invention as shown in Figure 1, by molybdenum rod 1, molybdenum sheet 2, molybdenum rod 3, molybdenum sheet 4, carbon fiber helicoid 5 forms.
Wherein, molybdenum rod 1, molybdenum sheet 2, molybdenum rod 3, molybdenum sheet 4 consists of the joint tetrads, its structure as shown in Figure 2, molybdenum rod 1 and molybdenum sheet 2, molybdenum sheet 2 and molybdenum rod 3, molybdenum rod 3 is welded to one another together with molybdenum sheet 4. The structure of molybdenum sheet 4 as shown in Figure 2, by end compressing tablet 6, the first compressing tablets 7, perforate 8, the second compressing tablets 9, the three compressing tablets 10, edge 11 6 parts are organically combined, punch forming, molybdenum sheet 4 is connected with the end of carbon fiber helicoid, its Connection Step as shown in Figure 3. Concrete operations are earlier the carbon fiber spiral end of body to be inserted in the perforate 8 of molybdenum sheet 4, as shown in Figure 3, turn down first compressing tablet 7, compress carbon fiber; Use again the end compressing tablet 6 and molybdenum sheet 4 matrix fastenings of first compressing tablet, turn down second compressing tablet 9, be pressed on first compressing tablet, turn down the 3rd compressing tablet 10, be pressed on second compressing tablet 9, again with the end turnover and sheet 4 matrix fastenings of the 3rd compressing tablet, last firm in the 11 places spot welding of the edge of the 3rd compressing tablet.
When utilizing the present invention to make the carbon fiber electrically heat radiation tube, Fig. 1 assembly integral body is packed in the quartz ampoule, get final product in molybdenum sheet 2 places hot pressing Vacuum Package.
Joint form of the present invention is simple, is easy to fix, and contact is good, is difficult for getting loose, and is easy to operate, is a kind of not only convenient but also reliable connected mode.
Embodiment
[embodiment 1]
A branch of 12K impregnated carbon fiber is being contained phenolic resins 5%; in the organic solvent of alcohol 95% 10 minutes; dry after the taking-up; the carbon fiber that this bundle was flooded organic solvent with the pitch uniform winding on the quartz ampoule of 10 millimeters of external diameters; the stove of the quartz ampoule that has twined carbon fiber being put into the high pure nitrogen protection heats; 750 ℃ of temperature; be incubated 28 minutes; from stove, take out; after being cooled to room temperature under the nitrogen protection atmosphere, extract the quartz ampoule supporter out; just make stereotyped core-less carbon fiber spiral coil; process the joint tetrad by Fig. 2 mode, it is firm to be connected with core-less carbon fiber spiral coil according to Fig. 3 step, promptly makes the calandria that can be used as the carbon fiber electrically heat radiation tube; this calandria is reinstalled quartz ampoule, can make the carbon fiber electrically heat radiation tube in molybdenum sheet 2 places vacuum hotpressing encapsulation.
[embodiment 2]
A branch of 12K impregnated carbon fiber is being contained phenolic resins 20%; in the organic solvent of alcohol 80% 15 minutes; dry after the taking-up; being wrapped in quartz ampoule according to embodiment 1 step supports on the core body; the stove of the quartz ampoule that has twined carbon fiber being put into the high pure nitrogen protection heats; 1000 ℃ of temperature; be incubated 15 minutes; after being cooled to room temperature under the nitrogen protection atmosphere, extract the quartz ampoule supporter out; just make stereotyped core-less carbon fiber spiral coil; process the joint tetrad by Fig. 2 mode; be connected with core-less carbon fiber spiral coil well according to Fig. 3 step; promptly make the calandria that can be used as the carbon fiber electrically heat radiation tube, this calandria is reinstalled quartz ampoule, can make the carbon fiber electrically heat radiation tube in molybdenum sheet 2 places vacuum hotpressing encapsulation.
[embodiment 3]
A branch of 12K impregnated carbon fiber is being contained phenolic resins 35%, in the organic solvent of alcohol 65% 30 minutes, dry after the taking-up, be wrapped in Al according to embodiment 1 step
2O
3Pipe supports on the core body, will twine the Al of carbon fiber
2O
3The stove that pipe is put into the high pure nitrogen protection heats, and 1250 ℃ of temperature are incubated 15 minutes, extract Al out after being cooled to room temperature under the nitrogen protection atmosphere
2O
3Pipe supports, just make stereotyped core-less carbon fiber spiral coil, process the joint tetrad by Fig. 2 mode, be connected with core-less carbon fiber spiral coil well according to Fig. 3 step, promptly make the calandria that can be used as the carbon fiber electrically heat radiation tube, this calandria is reinstalled quartz ampoule, can make the carbon fiber electrically heat radiation tube in molybdenum sheet 2 places vacuum hotpressing encapsulation.
[embodiment 4]
12 bundle 1K carbon fiber knits are become to give birth to rope, be immersed in and contain phenolic resins 15%, in the organic solvent of alcohol 85% 20 minutes, dry after the taking-up, being wrapped in zirconia according to embodiment 1 step supports on the core body, the tubular zirconium-oxide that has twined carbon fiber is put into the vacuum furnace of graphite heating body, 1700 ℃ of temperature, be incubated 8 minutes, extract the zirconia supporter out after cooling to room temperature with the furnace, just make stereotyped core-less carbon fiber spiral coil, process the joint tetrad by Fig. 2 mode, be connected with core-less carbon fiber spiral coil well, promptly make the calandria that can be used as the carbon fiber electrically heat radiation tube according to Fig. 3 step, this calandria is reinstalled quartz ampoule, can make the carbon fiber electrically heat radiation tube in molybdenum sheet 2 places vacuum hotpressing encapsulation.
[embodiment 5]
3 bundle 12K carbon fiber twists are plied to rope, be immersed in and contain phenolic resins 8%, in the organic solvent of alcohol 92% 15 minutes, dry after the taking-up, being wrapped in zirconia according to embodiment 1 step supports on the core body, the tubular zirconium-oxide that has twined carbon fiber is put into the vacuum furnace of graphite heating body, 2100 ℃ of temperature, be incubated 4 minutes, extract the zirconia supporter out after cooling to room temperature with the furnace, just make stereotyped core-less carbon fiber spiral coil, process the joint tetrad by Fig. 2 mode, be connected with core-less carbon fiber spiral coil well, promptly make the calandria that can be used as the carbon fiber electrically heat radiation tube according to Fig. 3 step, this calandria is reinstalled quartz ampoule, can make the carbon fiber electrically heat radiation tube in molybdenum sheet 2 places vacuum hotpressing encapsulation.
Claims (2)
1. the preparation method of a core-less carbon fiber spiral coil electrical heating element comprises the preparation of carbon fiber helicoid and joint, it is characterized in that the preparation method of carbon fiber helicoid has following processing step:
(1) with impregnated carbon fiber carbon containing organic solvent, this solvent is liquid phenolic resin and alcohol blend, and its proportioning is: phenolic resins 5-35%, alcohol 95-65%;
(2) after the carbon fiber that will flood the carbon containing organic solvent dries, be wrapped in insulation with a constant pitch and support on the core body, then sintering in nitrogen protection stove or vacuum furnace;
During (3) with the typing of nitrogen protection stove sintering, sintering temperature is 700-1300 ℃, is incubated 5-30 minute; When finalizing the design with the vacuum furnace sintering, sintering temperature is 1500-2200 ℃, is incubated 3-10 minute;
(4) carbon fiber after the sintering typing is deviate from core body.
2. the preparation method of core-less carbon fiber spiral coil electrical heating element according to claim 1, the joint employing sequential organization that it is characterized in that carbon fiber helicoid is the tetrad structure of first molybdenum sheet (4)-first molybdenum rod (3)-second molybdenum sheet (2)-second molybdenum rod (1), wherein first molybdenum sheet (4) is middle laminated type structure with holes, first molybdenum sheet (4) connects carbon fiber helicoid, during connection the carbon fiber helicoid end is inserted in the perforate (8) of first molybdenum sheet (4), again first molybdenum sheet (4) turnover is pressed mutually edge electricity consumption sealing dress.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610042069 CN1809224B (en) | 2006-01-19 | 2006-01-19 | Preparation method of core-less carbon fiber spiral coil electrical heating element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610042069 CN1809224B (en) | 2006-01-19 | 2006-01-19 | Preparation method of core-less carbon fiber spiral coil electrical heating element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1809224A CN1809224A (en) | 2006-07-26 |
| CN1809224B true CN1809224B (en) | 2010-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610042069 Expired - Fee Related CN1809224B (en) | 2006-01-19 | 2006-01-19 | Preparation method of core-less carbon fiber spiral coil electrical heating element |
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| CN (1) | CN1809224B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105128359A (en) * | 2015-07-03 | 2015-12-09 | 苏州国宇碳纤维科技有限公司 | Processing technology for carbon-fiber heating tube |
| CN105014992A (en) * | 2015-07-03 | 2015-11-04 | 苏州国宇碳纤维科技有限公司 | Manufacturing technology for carbon fiber heating tube |
| CN112867185A (en) * | 2021-01-27 | 2021-05-28 | 陕西华东电锅炉制造有限公司 | Preparation method of high-strength heat accumulating type electric boiler electric heating element |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2591917Y (en) * | 2002-12-30 | 2003-12-10 | 李林林 | Carbon fiber electrothermal element |
| CN1564636A (en) * | 2004-03-19 | 2005-01-12 | 山东大学 | Low temp high radiation carbon fiber electrothermal radiation tube |
-
2006
- 2006-01-19 CN CN 200610042069 patent/CN1809224B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2591917Y (en) * | 2002-12-30 | 2003-12-10 | 李林林 | Carbon fiber electrothermal element |
| CN1564636A (en) * | 2004-03-19 | 2005-01-12 | 山东大学 | Low temp high radiation carbon fiber electrothermal radiation tube |
Non-Patent Citations (1)
| Title |
|---|
| JP平7-323492A 1995.12.12 |
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| CN1809224A (en) | 2006-07-26 |
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Granted publication date: 20100623 Termination date: 20200119 |