CN1809224A - 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
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- CN1809224A CN1809224A CN 200610042069 CN200610042069A CN1809224A CN 1809224 A CN1809224 A CN 1809224A CN 200610042069 CN200610042069 CN 200610042069 CN 200610042069 A CN200610042069 A CN 200610042069A CN 1809224 A CN1809224 A CN 1809224A
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Abstract
This invention relates to a centreless carbon fiber spiral body element preparation method, which is composed of the carbon fiber spiral body and the connector, when producing the carbon fiber spiral body, first dipping the carbon fiber into the organic solvent with carbon, then wrapping it around the insulating supporting core body with a certain pitch, and then agglomerating and shaping it in the nitrogen protective stove or the vacuum stove to produce the core body. The connector is used the lamination with the hole in its middle, which uses the spot welding package to connect with the carbon fiber spiral body to insure connecting with the end part of the centreless carbon fiber spiral body firmly. This invention can improve the agility of the structure of the carbon fiber electric heating pipe, which is fit for processing the special-shaped thermal element and satisfies for the demand of various electric heating eradiate pipes with high capability and high radiation.
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 are particularly suitable for civilian heating with carbon fiber processing and manufacturing electric heating radiant tube, 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
At the deficiencies in the prior art, the invention provides a kind of configuration flexibility that can improve carbon fiber electric heating tube, satisfy the preparation method of a kind of core-less carbon fiber spiral coil electrical heating element of various special-shaped electrothermal tube user demands.
The present invention is by 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 its blank area adopts molybdenum sheet-molybdenum rod-molybdenum sheet-molybdenum rod tetrad structure technology, wherein the molybdenum sheet that is connected with carbon fiber helicoid is the laminated type structure, edge electric welding encapsulation is guaranteed to contact well with the core-less carbon fiber spiral coil end.
Description of drawings
Fig. 1 is a core-less carbon fiber spiral coil electrical heating element structural representation of the present invention;
Fig. 2 launches schematic diagram for molybdenum sheet among the present invention;
Fig. 3 is molybdenum sheet laminated type structural representation among the present invention.
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 is formed.Wherein, molybdenum rod 1, molybdenum sheet 2, molybdenum rod 3, molybdenum sheet 4 constitutes 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 helicoid end to be inserted in the perforate 8 of sheet 4, as shown in Figure 3, turn down first compressing tablet 7, compress carbon fiber; Use 64 matrix fastenings of end compressing tablet of first compressing tablet again, 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, with the end turnover and sheet 4 matrix fastenings of the 3rd compressing tablet, last firm again 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.
(5) 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 at the quartz ampoule of packing into, can be made 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 carbon fiber point heat radiation tube, this calandria at the quartz ampoule of packing into, can be made 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; being wrapped in the Al2O3 pipe according to embodiment 1 step supports on the core body; the stove of the Al2O3 pipe that has twined carbon fiber being put into the high pure nitrogen protection heats; 1250 ℃ of temperature; be incubated 15 minutes; extracting the Al2O3 pipe after being cooled to room temperature under the nitrogen protection atmosphere out 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 carbon fiber point heat radiation tube, this calandria at the quartz ampoule of packing into, can be made 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 carbon fiber point heat radiation tube according to Fig. 3 step, this calandria at the quartz ampoule of packing into, can be made 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 carbon fiber point heat radiation tube according to Fig. 3 step, this calandria at the quartz ampoule of packing into, can be made the carbon fiber electrically heat radiation tube in molybdenum sheet 2 places vacuum hotpressing encapsulation.
Claims (2)
1, a kind of preparation method of 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 that it is characterized in that carbon fiber helicoid adopts molybdenum sheet, molybdenum rod tetrad structure, the molybdenum sheet that is connected with carbon fiber helicoid is middle laminated type structure with holes, through turning down mutual pressure, 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 |
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| 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 |
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| CN1809224A true CN1809224A (en) | 2006-07-26 |
| CN1809224B CN1809224B (en) | 2010-06-23 |
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| 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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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
Family Cites Families (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 |
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2006
- 2006-01-19 CN CN 200610042069 patent/CN1809224B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
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| CN1809224B (en) | 2010-06-23 |
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Granted publication date: 20100623 Termination date: 20200119 |