CN101880164A - Preparation method of semi-arc carbon fiber heating unit - Google Patents
Preparation method of semi-arc carbon fiber heating unit Download PDFInfo
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- CN101880164A CN101880164A CN2009101873682A CN200910187368A CN101880164A CN 101880164 A CN101880164 A CN 101880164A CN 2009101873682 A CN2009101873682 A CN 2009101873682A CN 200910187368 A CN200910187368 A CN 200910187368A CN 101880164 A CN101880164 A CN 101880164A
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Abstract
The invention relates to a preparation method of a semi-arc carbon fiber heating unit. The preparation method is characterized in that a carbon-containing organic solvent for soaking carbon fiber is a mixture solution of liquid phenolic resin and alcohol according to the ratio of 4-25 percent of phenolic resin and 96 to 75 percent of alcohol; a furnace for firing the carbon fiber is a high-purity nitrogen protection furnace or a vacuum furnace; when the high-purity nitrogen protection furnace is used for sintering and typing, the sintering temperature is 500-700 DEG C, and the heat preservation time is 2-5 minutes; when the vacuum furnace is used for sintering and typing, sintering is carried out in the vacuum furnace by adopting a gradually heating form, the heating rate is 100 to 150 DEG C/min, the sintering temperature is 2000-2500 DEG C, and the heat preservation time is 25 minutes; and the carbon-containing organic solvent retains the carbon component after sintering, and the carbon fiber heating unit is fixedly typed into a semi-arc meshy or circumnutated spiral type by the retained carbon component.
Description
Technical field the present invention relates to the carbon-fibre composite field, relates to the preparation method of semi-arc carbon fiber heating unit concretely.
The background technology electrical heating element is the key part of heating installation.Current application heating unit the most widely is a metallic substance, and because of the Heating temperature difference, heating unit 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, and send visible light during heating, thermo-efficiency is low, electrical heating element surfaceloadingrate height, the life-span is short, and particularly the easy oxidation of joint area breaks.Low-temp radiating pipe heating unit mainly adopts resistance wire at present, and the outside is equipped with high temperature steel protective sleeve protective resistance silk, but because the resistance wire self character is limit, thermo-efficiency transforms lower.Carbon fiber is originally as the filamentary material of carbon content more than 95%, self is near perfect black body, thermal transition efficient and radiation efficiency are high, simultaneously, carbon fiber also has high strength, and high-modulus is high temperature resistant, many excellent properties such as corrosion-resistant are particularly suitable for fields such as civilian heating, electric boiler, low-temperature bake equipment with carbon fiber processing and manufacturing electrically heated radiator tube.Because directly the heating unit 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, rate of heating is slow, the not anti-concussion of jolting, the use field of having limited this electrical heating element.People are studying spiral centreless formula carbon fiber heating body, can be used for using as electric heating tube in the silica tube, but when being used for container and heating, when making, increased some operations and the trouble that seems outward, especially when maintenance, will cause some heater wires to remove and the waste that produces.
Summary of the invention is at the deficiencies in the prior art, the invention provides and a kind ofly can improve the carbon fiber exothermic part configuration flexibility, satisfy the special-shaped heating element user demand of various containers, a kind of preparation method of being convenient to keep in repair the dismountable semi-arc carbon fiber heating unit of installing again.
Technical scheme of the present invention is: carbon fiber makes carbon fiber dictyosome or spirochete, by carbon fiber being soaked damp carbon containing organic solvent, after the moulding that circumnutates on the core body, the high temperature sintering typing, content comprises the proportioning of dipping carbon containing organic solvent, the method of high temperature sintering, and form carbon/carbon compound material, and carbon fiber dictyosome or the connection of spirochetal joint.Utilize carbon fiber dictyosome of the present invention or spirochete as heating member, can develop the high radiation semi-arc carbon fiber heating unit of high-performance, divide partly to be centered around water or the liquid in the heating metal container on the metal vessel outer wall.
The preparation method of semi-arc carbon fiber heating unit of the present invention; its gordian technique is the netted or spirrillum that carbon fiber is made by elder generation; flood the carbon containing organic solvent again; drying the back is circumnutating on insulation support core body with the dictyosome of two halves form or the spirrillum of a constant pitch on the particular manufacturing craft; then its sintering typing in nitrogen protection or vacuum oven is opened core body; adopt tinsel or lamination of metal plates structure formation at carbon fiber dictyosome or spirochete end, use the mechanical compaction joint.
The preparation method of semi-arc carbon fiber heating unit of the present invention, dipping is the mixed solution of liquid phenolic resin and alcohol with the carbon containing organic solvent, proportioning is:
Resol: 4-25%
Alcohol: 96-75%
The preparation method of semi-arc carbon fiber heating unit of the present invention, the type of furnace of firing usefulness are that high pure nitrogen protection stove or vacuum are protected.During with the typing of high pure nitrogen protection stove sintering, sintering temperature is 500-700 ℃, soaking time 2-5 minute; Utilize vacuum oven sintering when typing, adopt gradually the form of heating to carry out sintering in vacuum oven, the speed of heating is 100～150 ℃/minute, and sintering temperature is 2000-2500 ℃, and soaking time obtained product after 25 minutes.
The preparation method of semi-arc carbon fiber heating unit of the present invention, the carbon containing organic solvent remains with the composition of carbon behind sintering, and other impurity are become flue gas after burning out discharges, and the carbon composition of its reservation fixedly is fixed to carbon fiber exothermic part netted or circumnutates spiral.Its shank adopts the lamination of tinsel, plate or bar to adopt machine pressing to connect at the carbon fiber helicoid end, is commonly called as to laminated type connects, and guarantees that contact firmly.
The present invention easily makes, and is netted or spiral-shaped indeformable, is convenient to install and remove, and is applicable to that the outer electric heating body of special-shaped metal vessels such as circle, pyriform, U-shaped uses.Indeformable when the product that processes re-assemblies in use for some time, reuse this product behind the replaceable miscellaneous part again.Joint form 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 mode of connection.
Description of drawings
Fig. 1 is the three-dimensional simplified schematic diagram of the present invention
Fig. 2 is the three-dimensional simplified schematic diagram of the latticed heating element of the present invention
Fig. 3 is the three-dimensional simplified schematic diagram of container of the present invention
Fig. 4 is the present invention's half arc up and down three-dimensional simplified schematic diagram of connector lug carbon fiber exothermic part of formula that circumnutates
Fig. 5 is the present invention's half arc circumnutate formula up and down connector lug carbon fiber exothermic part and container combination solid simplified schematic diagram
Fig. 6 is the three-dimensional simplified schematic diagram of the present invention's half arc hyperbolic connector lug carbon fiber exothermic part on formula
Fig. 7 is the present invention's half arc hyperbolic connector lug carbon fiber exothermic part and the three-dimensional simplified schematic diagram of container combination on formula
Accompanying drawing 1 is a carbon fiber helicoid, and 2 is carbon fiber exothermic part.
Embodiment
Embodiment one: make a branch of 12K carbon fiber latticed; be immersed in and contain resol 4%; in the organic solvent of alcohol 96% 5 minutes; dry after the taking-up; two on the latticed carbon fiber that flooded organic solvent is centered around forms tubular on the container; the stove of putting into the high pure nitrogen protection heats; 500 ℃ of temperature are incubated 2 minutes, take out from stove; after being cooled to room temperature under the nitrogen protection atmosphere, extract container out; just make stereotyped latticed carbon fiber 1, suspension type enters in the vacuum oven and finalizes the design with the form sintering of heating gradually then, and the speed of heating is 100 ℃/minute; heat gradually to 2000 ℃, be incubated and obtain half arc grid, 1 shape carbon fiber exothermic part 2 after 25 minutes.
Embodiment two: 12 bundle 1K carbon fiber knits are become rope; on particular manufacturing craft, circumnutate into the half arc up and down connector lug carbon fiber of formula that circumnutates; be immersed in and contain resol 10%; in the organic solvent of alcohol 90% 10 minutes; dry after the taking-up; getting two according to embodiment one step is centered around on the container support core body; the stove of putting into the high pure nitrogen protection heats; 600 ℃ of temperature; be incubated 3 minutes; from stove, take out, after being cooled to room temperature under the nitrogen protection atmosphere, extract the container support core body out, just make the half stereotyped arc formula connector lug carbon fiber 1 up and down that circumnutates; suspension type enters in the vacuum oven with the form sintering typing of heating gradually then; the speed of heating is 120 ℃/minute, heats gradually to 2200 ℃, is incubated and obtains the half arc up and down connector lug carbon fiber exothermic part of formula that circumnutates after 25 minutes.
Embodiment three: 3 bundle 12K carbon fiber twists are plied to rope; circumnutating into half arc hyperbolic connector lug carbon fiber on formula on the particular manufacturing craft; be immersed in and contain resol 25%; in the organic solvent of alcohol 75% 15 minutes; dry after the taking-up; getting two according to embodiment one step is centered around the stove of putting into high pure nitrogen protection on the container support core body and heats; 700 ℃ of temperature; be incubated 5 minutes; from stove, take out; after being cooled to room temperature under the nitrogen protection atmosphere, extract the container support body out; just make stereotyped half arc hyperbolic connector lug carbon fiber on formula, suspension type enters in the vacuum oven and finalizes the design with the form sintering of heating gradually then, and the speed of heating is 150 ℃/minute; heat gradually to 2500 ℃, be incubated and obtain half arc hyperbolic connector lug carbon fiber exothermic part on formula after 25 minutes.
More than the product that processes of three examples of implementation indeformable when re-assemblying in use for some time, reuse this product behind the replaceable miscellaneous part again.Preparation method of the present invention, gordian technique are to close the carbon organic solvent remains with carbon behind sintering composition, and other impurity are become flue gas after burning out discharges, and the carbon composition of its reservation is with the fixing typing of carbon fiber exothermic part.Its shank adopts the lamination of tinsel or plate to adopt machine pressing to connect at the carbon fiber helicoid two ends, is commonly called as to laminated type connects, and guarantees that contact firmly.
Claims (3)
1. the preparation method of semi-arc carbon fiber heating unit is characterized in that:
(1) impregnated carbon fiber is the mixed solution of liquid phenolic resin and alcohol with the carbon containing organic solvent, and proportioning is: resol: 4-25%, alcohol: 96-75%;
(2) to fire the type of furnace of usefulness be that high pure nitrogen protection stove or vacuum are protected to carbon fiber, and during with the typing of high pure nitrogen protection stove sintering, sintering temperature is 500-700 ℃, soaking time 2-5 minute;
(3) utilize vacuum oven sintering when typing, adopt gradually the form of heating to carry out sintering in vacuum oven, the speed of heating is 100～150 ℃/minute, and sintering temperature is 2000-2500 ℃, soaking time 25 minutes;
(4) the carbon containing organic solvent remains with the composition of carbon behind sintering, and it is netted or circumnutate spiral that the carbon composition of its reservation fixedly is fixed to half arc with carbon fiber exothermic part.
2. the preparation method of semi-arc carbon fiber heating unit according to claim 1 is characterized in that: the carbon containing organic solvent is through sintering, and other impurity are become flue gas and discharge after burning out.
3. the preparation method of semi-arc carbon fiber heating unit according to claim 1, it is characterized in that: its shank adopts the lamination of tinsel or metal sheet to adopt machine pressing to connect at the carbon fiber exothermic part end, be commonly called as to laminated type connects, guarantee that contact firmly.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101873682A CN101880164A (en) | 2009-09-15 | 2009-09-15 | Preparation method of semi-arc carbon fiber heating unit |
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| CN2009101873682A CN101880164A (en) | 2009-09-15 | 2009-09-15 | Preparation method of semi-arc carbon fiber heating unit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102965768A (en) * | 2012-11-28 | 2013-03-13 | 上海易是好电器有限公司 | Method for preparing carbon-carbon composition heating wire by taking carbon fiber yarn as base, and related carbon-carbon composition heating wires |
| CN104710184B (en) * | 2013-12-12 | 2017-01-25 | 航天睿特碳材料有限公司 | Gas phase rapid preparation method of U-type carbon/carbon heat-generating body |
| CN111947294A (en) * | 2020-07-10 | 2020-11-17 | 珠海格力电器股份有限公司 | Heating sterilization protective cover for total heat exchange core and total heat exchange structure |
-
2009
- 2009-09-15 CN CN2009101873682A patent/CN101880164A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102965768A (en) * | 2012-11-28 | 2013-03-13 | 上海易是好电器有限公司 | Method for preparing carbon-carbon composition heating wire by taking carbon fiber yarn as base, and related carbon-carbon composition heating wires |
| CN104710184B (en) * | 2013-12-12 | 2017-01-25 | 航天睿特碳材料有限公司 | Gas phase rapid preparation method of U-type carbon/carbon heat-generating body |
| CN111947294A (en) * | 2020-07-10 | 2020-11-17 | 珠海格力电器股份有限公司 | Heating sterilization protective cover for total heat exchange core and total heat exchange structure |
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Application publication date: 20101110 |