CN110257959A - It is a kind of to be graphitized equipment with the carbon fiber microwave of Continuous maching - Google Patents
It is a kind of to be graphitized equipment with the carbon fiber microwave of Continuous maching Download PDFInfo
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- CN110257959A CN110257959A CN201910571990.7A CN201910571990A CN110257959A CN 110257959 A CN110257959 A CN 110257959A CN 201910571990 A CN201910571990 A CN 201910571990A CN 110257959 A CN110257959 A CN 110257959A
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- microwave
- carbon fiber
- microwave heating
- cavity
- heating cavity
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 93
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 93
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 91
- 238000010438 heat treatment Methods 0.000 claims abstract description 145
- 230000001681 protective effect Effects 0.000 claims abstract description 26
- 239000007787 solid Substances 0.000 claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- 238000012544 monitoring process Methods 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 49
- 239000000835 fiber Substances 0.000 claims description 47
- 229910052799 carbon Inorganic materials 0.000 claims description 45
- 238000000034 method Methods 0.000 claims description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 5
- 101100063437 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) DIN7 gene Proteins 0.000 claims description 3
- 238000009529 body temperature measurement Methods 0.000 claims description 3
- 208000002925 dental caries Diseases 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000012545 processing Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 47
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- 238000005087 graphitization Methods 0.000 description 14
- 239000011261 inert gas Substances 0.000 description 14
- 238000007789 sealing Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 9
- 239000011521 glass Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- 230000005855 radiation Effects 0.000 description 9
- 230000006698 induction Effects 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- -1 copper It is more Chemical class 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 210000004907 gland Anatomy 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
- D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
- D01F9/12—Carbon filaments; Apparatus specially adapted for the manufacture thereof
Abstract
The invention discloses a kind of equipment can be graphitized with the carbon fiber microwave of Continuous maching; inlet gas dynamic seal apparatus and exit gas dynamic seal apparatus are respectively equipped in the two sides of microwave heating cavity; the two sides of microwave heating cavity are tightly connected with inlet gas dynamic seal apparatus and exit gas dynamic seal apparatus respectively by metal tube; it is also connected with protective gas air inlet pipe between microwave heating cavity and inlet gas dynamic seal apparatus, protective gas forced air cooled tube is also connected between microwave heating cavity and exit gas dynamic seal apparatus.The present invention includes microwave TT&C system, can the variation of real-time monitoring incidence/reflection power, adjust frequency in real time, guarantee that solid state microwave sources and cavity have preferable matching degree；The present invention also provides several production efficiency can be substantially increased with the cylindrical cavity of the road simultaneous processing N carbon fiber；Structure is simple, small in size, at low cost, is convenient for volume production.
Description
Technical field
The present invention relates to carbon fiber and graphite technical field of heating, more particularly to one kind can be micro- with the carbon fiber of Continuous maching
Wave is graphitized equipment.
Background technique
High-modulus graphitized carbon fibre and referred to as graphite fibre, it is considered that the modulus of carbon fiber is lower than 344GPa, stone
The modulus of black fiber is higher than 344GPa.Graphite fibre has the excellent performance such as high-modulus, high intensity and low-gravity, be national defence with
The strategic material of the key of the development of the national economy.Currently, domestic carbon fibre material is mainly used in Leisure Sport articles, but technical grade
Carbon fiber dimensional ratio is stepping up in recent years, and the demand of technical grade and army grade high-modulus graphitized carbon fibre is huge.Stone
The manufacture of inkization carbon fiber needs higher heating temperature, and graphitization temperature, which theoretically calculates, needs a 2500-3000 DEG C of left side
It is right.
Microwave heating equipment has had very long history, and material is generated heat by own absorption microwave energy, concrete principle
It is integrally heated due to caused by itself dielectric loss in electromagnetic field for material.Carbon fiber microwave graphitization is based on this
The carbon content of principle of heating, the carbon fiber after carbonization reaches 90% or more, has excellent Microwave Absorption Properties；Microwave adds
Heat has selectivity, only can heat carbon fibre tow without oven wall, to solve the problems, such as heating efficiency, prevent skin
The generation of core phenomenon, while can also greatly prolong the service life of heating device.
Most domestic enterprise and research unit all by the way of traditional heat radiation heating, pass through heating in medium frequency at present
Mode, first heating furnace, so that entire in-furnace temperature reaches a suitable heating interval, carbon fibre tow is continued to pass through entirely
The graphitization processing of carbon fiber is completed in heating zone.This method is primarily present following disadvantage: (1) traditional heating method
Heating rate is slow, and the thermal efficiency is lower；(2) unbearable 2000 DEG C of the inner-wall material of traditional heating burner hearth or more high temperature, furnace
Thorax is under the baking effect of long-time high temperature, and easily generation burner hearth cracks and incinerates phenomenon, greatly shortens the service life of burner hearth.
Carbon fiber microwave heating has following difference compared with conventional radiation heats on heat transfer type: (1) traditional heat radiation
Method is that heat is conducted heat by surface to object to by far-infrared radiation to body surface, and then by way of heat transfer
Internal portion, the inside and outside of such object can generate certain temperature difference, may result in the generation of core-skin phenomenon；(2) and it is micro-
Wave heating is the object inside and outside due to caused by dielectric loss while heating, and does not need heat transfer, and heating is more rapidly and more
Uniformly, it is very suitable to heating carbon fibre tow.
Other than above-mentioned conventional radiation heating method, there are also a kind of modes of high-frequency induction heating.Chinese patent (patent Shen
Please number: 02135138) disclose " a kind of method for producing high-strength high-modules carbon fibre and its special equipment ", high-frequency induction used to add
The mode of heat, this method are primarily present following disadvantage: (1) obtaining since the conductivity of carbon fiber is small compared to metals such as copper
It is more, cause high-frequency induction heating efficiency lower；(2) since heating generator is easy to be fluctuated by external voltage, lead to output work
Rate is unstable, and carbon fiber heating temperature fluctuation is obvious, influences product quality.
Carbon fiber microwave heating has following difference: (1) high frequency sense compared with conventional highfrequency induction heating on heating method
Should heat is to generate alternating magnetic field in heating zone, and carbon fiber generates vortex under alternating magnetic field induction, to generate heating effect
Process.But the conductivity of carbon fiber is much smaller compared to metals such as copper, causes high-frequency induction heating efficiency lower, while there is also
The unstable problem of output power；(2) and microwave heating is mainly to pass through the dielectric polorization relaxation loss of carbon fiber, absorb microwave
Energy and the process for being translated into heat.Meanwhile carbon fiber is a kind of high lossy medium, therefore microwave heating ultrahigh in efficiency.
Solid state microwave sources output power for generating microwave is more stable, helps to ensure that carbon fiber product quality.
Summary of the invention
The purpose of the invention is to make up the defect of prior art, providing one kind can be with the carbon fiber microwave of Continuous maching
It is graphitized equipment.
The present invention is achieved by the following technical solutions:
It is a kind of to be graphitized equipment with the carbon fiber microwave of Continuous maching, it include microwave heating cavity, microwave source, carbon fiber
Dimension silk puts a roller bearing and carbon fiber wire receives silk roller bearing, and the microwave that microwave source generates adds from the side feed-in microwave of microwave heating cavity
Hot inside cavity is respectively equipped with inlet gas dynamic seal apparatus and exit gas-dynamic in the two sides of microwave heating cavity
Sealing device, the two sides of microwave heating cavity by metal tube respectively with inlet gas dynamic seal apparatus and exit gas
Dynamic sealing means are tightly connected, and protection gas is also connected between microwave heating cavity and inlet gas dynamic seal apparatus
Body air inlet pipe is also connected with protective gas forced air cooled tube between microwave heating cavity and exit gas dynamic seal apparatus, leads to
Overprotection gas inlet pipe is passed through protective gas in microwave heating chamber body, by protective gas forced air cooled tube be passed through air-cooled gas to
Carbon fibre tow air blast cooling after heating, is also equipped with temperature measuring equipment on the outside of microwave heating cavity, and carbon fiber wire puts silk
Carbon fiber wire on roller bearing sequentially passes through inlet gas dynamic seal apparatus and microwave heating cavity, and carbon fiber wire is by micro-
It when Wave heating cavity, is heated by microwave, the carbon fiber wire after heating is pierced by microwave heating cavity, and passes through exit gas
Body dynamic sealing means receive silk roller bearing by carbon fiber wire and carry out receipts silk.
It further include having microwave control unit, incidence/reflection power of microwave control unit real-time monitoring microwave heating cavity,
And the power exported according to the big minor adjustment microwave source microwave of reflection power.
The microwave source uses solid state microwave circuits, has the adjusting of accurate microwave power and frequency regulation function, together
When output single channel or multi-channel microwave power, work centre frequency point is 315MHz, 433MHz, 915MHz and 2450MHz, bandwidth
It is 100MHz, using the direct-coupled mode of coaxial line, by DIN7/16 modular connection by microwave from microwave heating cavity
Side feed-in.
The microwave heating cavity is cylindrical cavity, and microwave heating cavity has single channel and N line structure: single channel is will be micro-
Wave processes carbon fiber in chamber central from the side feed-in of cylindrical cavity；The road N is divided into following several: (1) chamber central feed-in is micro-
Wave, the surrounding symmetrical road N carbon fiber；(2) internal symmetry is distributed N number of identical coaxial line for feed-in microwave, external right
Claim the distribution road N carbon fiber；(3) outer symmetrical is distributed N number of identical coaxial line for feed-in microwave, and internal symmetry is distributed the road N
Carbon fiber, wherein N >=4.
The single channel cylindrical cavity includes a cylinder, and cylinder two sides are respectively fixed with cover board, in two cover plates
In be provided with circular hole, be connected separately with shielded tube on two circular holes, two shielded tubes respectively with inlet gas-dynamic
Sealing device is connected with exit gas dynamic seal apparatus, be respectively equipped on two cover plates two pieces for tuning rotation lid
Plate.
Quartz glass tube is equipped in the microwave heating chamber body, carbon fibre tow continues through in quartz glass tube
Microwave heating cavity carries out microwave heating.Quartz glass tube passes through cavity, and carbon fibre tow continues through in quartz glass tube
Cavity carries out microwave heating, it is contemplated that carbon-fiber high-temperature volatilization problems can take that glass tube, replacement tubing is not added or is added and inhale
The measures such as enclosure material；Dynamic sealing means and air seal set are installed in the import and export of carbon fibre tow；The high temperature in exit
Graphitized carbon fibre tow carries out pressure wind using the mixed gas of high pure nitrogen, other inert gases or different inert gas
It is cold.
Microwave heating temperature can achieve 2500 DEG C or more, continuous uniform heating；The temperature measuring equipment is using non-contact
Formula laser aiming infrared radiation thermometer carries out temperature measurement.
In order to reach the required temperature of graphitization, can use the concatenated cascading of multiple cavities.It will be multiple identical
The series connection of microwave heating cavity, each microwave heating cavity is respectively connected with microwave source, and carbon fibre tow successively passes through multiple series connection
Microwave heating cavity heated.
The protective gas is usually by the mixed gas group of high pure nitrogen, other inert gases or different inert gas
At, in order to accelerate be graphitized speed, fraction of boron element can be added in protective gas.
The invention has the advantages that (1), for the carbon fiber of high strength and modulus, graphitization heating temperature is usually answered
This reaches 2500 DEG C or more.Equipment is graphitized using microwave, several Baidu or so can be improved than conventional heat radiation heating temperature；
(2) microwave graphitization equipment is the equipment using microwave heating carbon fibre tow, microwave entirely different with heat radiation heating method
The heating of heating carbon fibre tow is inside and outside entirety while heating that this heating method will not generate core-skin phenomenon.To carbon fiber
The heating of tow is completed in microwave cavity, and the inner wall temperature of cavity is not high, and such heater inner wall will not generate open
Phenomenon is split or incinerates, heater life can greatly prolong；(3) conductivity of carbon fiber is smaller compared to metals such as copper, leads to high frequency
Induction heating efficiency is lower, while the problem unstable there is also output power.And microwave heating mainly passes through carbon fiber
Dielectric polorization relaxation loss absorbs microwave energy and is translated into the process of heat.Carbon fiber is a kind of high loss Jie simultaneously
Matter, therefore microwave heating ultrahigh in efficiency.Solid state microwave sources output power for generating microwave is more stable, helps to ensure that carbon
The quality of fiber product；(4) microwave graphitization equipment only heats carbon fibre tow, will not heat other components, thus it is this plus
Hot mode has high heating efficiency；(5) present invention includes microwave TT&C system, being capable of real-time monitoring incidence/reflection power
Variation, adjust frequency in real time, guarantee that solid state microwave sources and cavity have preferable matching degree；(6) the present invention also provides several
Kind can substantially increase production efficiency with the cylindrical cavity of the road simultaneous processing N (N >=4) carbon fiber；(7) there is leather as one
The carbon fiber microwave of life property is graphitized equipment, and structure is simple, small in size, at low cost, is convenient for volume production.
Detailed description of the invention
Fig. 1 is that carbon fiber microwave is graphitized equipment two-dimensional structure schematic diagram.
Fig. 2 is that carbon fiber microwave is graphitized equipment three dimensional structure diagram.
Fig. 3 is single channel microwave heating cavity structural schematic diagram.
Fig. 4 is in chamber central feed-in microwave, the microwave heating cavity structural representation of surrounding symmetrical four road carbon fiber
Figure.
Fig. 5 is that internal symmetry is distributed four identical coaxial lines for feed-in microwave, and outer symmetrical is distributed four tunnel carbon fibers
The microwave heating cavity structural schematic diagram of dimension.
Fig. 6 is that outer symmetrical is distributed four identical coaxial lines for feed-in microwave, and internal symmetry is distributed four tunnel carbon fibers
The microwave heating cavity structural schematic diagram of dimension.
Fig. 7 is the cascading schematic diagram of multiple microwave heating cavitys.
Fig. 8 is microwave TT&C system schematic diagram.
Fig. 8 is microwave TT&C system schematic diagram.
Fig. 9 is contactless labyrinth gland schematic diagram.
Specific embodiment
As shown in Figure 1, a kind of can be graphitized equipment with the carbon fiber microwave of Continuous maching, include microwave heating cavity 1,
Microwave source 2, carbon fiber wire put a roller bearing 3 and carbon fiber wire and receive silk roller bearing 4, and the microwave that microwave source 2 generates is from microwave heating cavity 1
Side feed-in microwave heating cavity 1 inside, the two sides of microwave heating cavity 1 be respectively equipped with inlet gas-dynamic sealing dress
5 and exit gas dynamic seal apparatus 6 are set, the two sides of microwave heating cavity 1 are dynamic with inlet gas respectively by metal tube
State sealing device 5 and exit gas dynamic seal apparatus 6 are tightly connected, in microwave heating cavity 1 and inlet gas-dynamic
Protective gas air inlet pipe 7 is also connected between sealing device 5, in microwave heating cavity 1 and exit gas dynamic seal apparatus 6
Between be also connected with protective gas forced air cooled tube 8, protective gas is passed through in microwave heating cavity 1 by protective gas air inlet pipe 7,
Air-cooled gas is passed through to the carbon fibre tow air blast cooling after heating, in microwave heating cavity 1 by protective gas forced air cooled tube 8
Outside is also equipped with temperature measuring equipment 9, and the carbon fiber wire that carbon fiber wire puts on a roller bearing 3 sequentially passes through the sealing of inlet gas-dynamic
Device 5 and microwave heating cavity 1, carbon fiber wire are heated, the carbon after heating when by microwave heating cavity by microwave
Fiber filament is pierced by microwave heating cavity 1, and passes through exit gas dynamic seal apparatus 6, by carbon fiber wire receive silk roller bearing 4 into
Row receives silk.
It further include having microwave control unit 10, incidence/reflection of 10 real-time monitoring microwave heating cavity of microwave control unit
Power, and the power exported according to the big minor adjustment microwave source microwave of reflection power.
The microwave source 2 uses solid state microwave circuits, has the adjusting of accurate microwave power and frequency regulation function, together
When output single channel or multi-channel microwave power, work centre frequency point is 315MHz, 433MHz, 915MHz and 2450MHz, bandwidth
It is 100MHz, using the direct-coupled mode of coaxial line, by DIN7/16 modular connection by microwave from microwave heating cavity
Side feed-in, microwave heat carbon fibre tow in the form of a kind of electromagnetic focusing.
The microwave heating cavity 1 is cylindrical cavity, and microwave heating cavity has single channel and a N line structure: single channel be by
Microwave processes carbon fiber in chamber central from the side feed-in of cylindrical cavity；The road N is divided into following several: (1) chamber central feed-in
Microwave, the surrounding symmetrical road N carbon fiber；(2) internal symmetry is distributed N number of identical coaxial line for feed-in microwave, external
The symmetrical road N carbon fiber；(3) outer symmetrical is distributed N number of identical coaxial line for feed-in microwave, and internal symmetry is distributed N
Road carbon fiber, wherein N >=4.
The single channel cylindrical cavity includes a cylinder 11, and 11 two sides of cylinder are respectively fixed with cover board 12, at two pieces
Be provided with circular hole in cover board 12, be connected separately with shielded tube 13 on two circular holes, two shielded tubes 13 respectively with enter
Mouthful place gas dynamic seal apparatus 5 and exit gas dynamic seal apparatus 6 connection, be respectively equipped on two cover plates two pieces with
14 are rotated the cover in tuning.Cylindrical cavity is made of metallic aluminium；
Quartz glass tube is equipped in the microwave heating cavity 1, carbon fibre tow continuously leads in quartz glass tube
It crosses microwave heating cavity and carries out microwave heating.Quartz glass tube passes through cavity, and carbon fibre tow continuously leads in quartz glass tube
It crosses cavity and carries out microwave heating, it is contemplated that carbon-fiber high-temperature volatilization problems can be taken and glass tube, replacement tubing or addition is not added
The measures such as adsorbent material；Dynamic sealing means and air seal set are installed in the import and export of carbon fibre tow；The height in exit
Temperature graphitization carbon fibre tow carries out pressure wind using the mixed gas of high pure nitrogen, other inert gases or different inert gas
It is cold.
Microwave heating temperature can achieve 2500 DEG C or more, continuous uniform heating；The temperature measuring equipment 9 is using non-contact
Formula laser aiming infrared radiation thermometer carries out temperature measurement.
In order to reach the required temperature of graphitization, can use the concatenated cascading of multiple cavities.It will be multiple identical
Microwave heating cavity 1 connect, each microwave heating cavity 1 is respectively connected with microwave source 2, and carbon fibre tow successively passes through multiple strings
The microwave heating cavity of connection is heated.
The single channel cylindrical cavity two sides cover plate central position is provided with two through hole, and glass tube passes through chamber by two through hole
Body, carbon fibre tow continue through cavity absorption microwave in glass tube and are heated, it is contemplated that carbon-fiber high-temperature volatilization problems,
It can take and the measures such as glass tube, replacement tubing or addition adsorbent material are not added.
Solid state microwave sources generate microwave, and microwave is by generating resonance in coaxial line feed-in cylindrical cavity, microwave is with a kind of electricity
Magnetically focused form heats carbon fibre tow；Cylindrical cavity is substantially a kind of microwave applicator, and the microwave that the present invention uses adds
Hot device is not limited to Cylindrical heater, further includes rectangular heater, ellipse and ball heater, disk-loaded waveguide heater, medium
Load heater, travelling-wave cavity heater etc..
The design of the cylindrical cavity will make the electric field strength near carbon fibre tow maximum, to improve carbon fiber
Heating efficiency；The design of cylindrical cavity will also guarantee that cylindrical cavity resonance frequency matches with solid state microwave sources.
In order to avoid carbon fibre tow when moving substitutes into air in cavity, the import and export in carbon fibre tow is needed
Dynamic sealing means and air seal set are installed；The high-temperature oxydation exported in order to prevent needs the high temperature graphitization to exit
Carbon fibre tow carries out air blast cooling using the mixed gas of high pure nitrogen, other inert gases or different inert gas.
The temperature measuring equipment 9 utilizes the non-contacting measuring principle of infrared ray, is directly measured by way of optical focus
Lesser object, precision is up to 0.5%.
The microwave control unit 10 is capable of incidence/reflection power of real-time monitoring cylinder resonator body, and according to anti-
The size of power is penetrated, the frequency of microwave source microwave output is adjusted, so that the resonance frequency of cylinder resonator and microwave source be made to export
The frequency of microwave matches.
The protective gas is usually by the mixed gas group of high pure nitrogen, other inert gases or different inert gas
At, in order to accelerate be graphitized speed, fraction of boron element can be added in protective gas.
The carbon fiber microwave graphitization equipment uses heats carbon fibre tow, by inputting protective gas
Reaction temperature needed for temperature is promoted to graphitization, can be rapidly completed graphitizing process.
Microwave graphitization temperature should reach 2500 DEG C or more, and need to guarantee the stability of heating process.Before heating, it needs
The protective layer on carbon fibre tow surface is removed with hot water wash；After the completion of heating, need to plate protection again in carbon fiber surface
Layer.In cavity heating zone, carbon fibre tow cannot directly be contacted with the inner wall of heating cavity, otherwise will burn out cavity inner wall.
As shown in figure 9, the inlet gas dynamic seal apparatus 5 and exit gas dynamic seal apparatus is all made of
Contactless labyrinth gland, protective gas expanding chamber 22 is constituted between baffle 23, and protective gas is entered swollen by entrance 24
Swollen room 22, protective gas incident direction should enter perpendicular to carbon fibre tow moving direction, carbon fibre tow from tow entrance 21
Sealing device leaves sealing device from tow outlet 25.Its purpose is to prevent from air from importing and exporting from carbon fibre tow to enter,
Lead to carbon fibre tow oxidation by air in graphitization.
For the air being discharged in glass pipe reactor, need to be passed through protective gas in glass tube, protective gas is usual
It is made of the mixed gas of high pure nitrogen, other inert gases or different inert gas；The graphited reactor of carbon fiber microwave
Material is pure quartz glass, it uses sealing structure to prevent air from entering between metal tube, by being arranged in quartzy glass
Carbon fiber is fixed on the center of cavity by the trunnion in glass pipe reactor；Different location punching in carbon fiber outlet, dress
Upper temperature tube is measured using outlet temperature of the non-contact laser aiming infrared thermometer to carbon fiber；Microwave control is single
Member is made of solid state microwave sources, temperature sensor, industrial personal computer and digital simulation controller etc., and industrial personal computer is after obtaining temperature signal
Digital simulation controller is driven, so that the power of solid-state microwave amplifier output microwave is controlled, to meet carbon fiber and graphite institute
The temperature needed.In addition, industrial personal computer can also control the frequency of microwave, the throughput of protective gas, the pulling force of folding and unfolding silk and rate；
Air-cooling apparatus cools down carbon fiber using the mixed gas of high pure nitrogen, other inert gases or different inert gas,
The temperature that carbon fiber is reduced in the shorter time, prevents the coefficient of expansion inside and outside carbon fiber different, generates core-skin phenomenon.
Carbon fiber microwave heating cavity in Fig. 1 can multiple concatenated cascaded series of microwave heating cavity as shown in Figure 7
Closing indicates, the cascading that multiple cavities are together in series, which is more advantageous to, to be heated to carbon fibre tow to be graphitized required temperature.
In cavity heating zone, carbon fibre tow cannot directly be contacted with the inner wall of heating cavity, otherwise will be burnt out in cavity
Wall.Before heating, need to be gone the protective layer on carbon fibre tow surface with hot water wash；After the completion of heating, need in carbon fiber surface
Again up-protective layer is plated in face.
Microwave TT&C system with reference to Chinese patent " a kind of new automobile Iganition control system " (number of patent application:
201710333159).Fig. 8 show the microwave TT&C system in carbon fiber microwave heating process, wherein phase locked source 15, driving stage
16, amplifying stage 17, coupler 18 and microwave heating cavity 1 are sequentially connected, incidence/reflection power that coupler 18 will be coupled out
It is transferred in wave detector 19, microwave signal is converted to analog signal and is transferred in processor 20 by wave detector 19, processor 20
Corresponding algorithm is combined according to the signal that detection comes out, realizes the adjusting for exporting the frequency and amplitude of microwave to phase locked source 15.
Claims (8)
1. one kind can be graphitized equipment with the carbon fiber microwave of Continuous maching, it is characterised in that: include microwave heating cavity, micro-
Wave source, carbon fiber wire put a roller bearing and carbon fiber wire and receive silk roller bearing, and the microwave that microwave source generates is from the side of microwave heating cavity
Feed-in microwave heating inside cavity is respectively equipped with inlet gas dynamic seal apparatus and outlet in the two sides of microwave heating cavity
Locate gas dynamic seal apparatus, the two sides of microwave heating cavity by metal tube respectively with inlet gas dynamic seal apparatus and
Exit gas dynamic seal apparatus is tightly connected, and is also connected between microwave heating cavity and inlet gas dynamic seal apparatus
It is connected to protective gas air inlet pipe, is also connected with protective gas between microwave heating cavity and exit gas dynamic seal apparatus
Forced air cooled tube is passed through protective gas in microwave heating chamber body by protective gas air inlet pipe, is passed through by protective gas forced air cooled tube
Air-cooled gas is also equipped with temperature measuring equipment, carbon to the carbon fibre tow air blast cooling after heating on the outside of microwave heating cavity
The carbon fiber wire that fiber filament puts on a roller bearing sequentially passes through inlet gas dynamic seal apparatus and microwave heating cavity, carbon fiber
Silk is heated, the carbon fiber wire after heating is pierced by microwave heating cavity, and wears when by microwave heating cavity by microwave
Exit gas dynamic seal apparatus is crossed, silk roller bearing is received by carbon fiber wire and carries out receipts silk.
2. one kind according to claim 1 can be graphitized equipment with the carbon fiber microwave of Continuous maching, it is characterised in that: also
It include microwave control unit, incidence/reflection power of microwave control unit real-time monitoring microwave heating cavity, and according to reflection
The power of the big minor adjustment microwave source microwave output of power.
3. one kind according to claim 1 can be graphitized equipment with the carbon fiber microwave of Continuous maching, it is characterised in that: institute
The microwave source stated uses solid state microwave circuits, while exporting single channel or multi-channel microwave power, work centre frequency point be 315MHz,
433MHz, 915MHz and 2450MHz, bandwidth are 100MHz, using the direct-coupled mode of coaxial line, pass through DIN7/16
Modular connection is by microwave from the side feed-in of microwave heating cavity.
4. one kind according to claim 3 can be graphitized equipment with the carbon fiber microwave of Continuous maching, it is characterised in that: institute
The microwave heating cavity stated is cylindrical cavity, and microwave heating cavity has single channel and a N line structure: single channel is by microwave from cylindrical cavity
The side feed-in of body processes carbon fiber in chamber central；The road N is divided into following several: (1) chamber central feed-in microwave, and surrounding is right
Claim the distribution road N carbon fiber；(2) internal symmetry is distributed N number of identical coaxial line for feed-in microwave, and outer symmetrical is distributed the road N
Carbon fiber；(3) outer symmetrical is distributed N number of identical coaxial line for feed-in microwave, and internal symmetry is distributed the road N carbon fiber,
Middle N >=4.
5. one kind according to claim 4 can be graphitized equipment with the carbon fiber microwave of Continuous maching, it is characterised in that: institute
The single channel cylindrical cavity stated includes a cylinder, and cylinder two sides are respectively fixed with cover board, is provided at the center of two cover plates
Circular hole, is connected separately with shielded tube on two circular holes, two shielded tubes respectively with inlet gas dynamic seal apparatus
Connected with exit gas dynamic seal apparatus, be respectively equipped on two cover plates two pieces for tuning rotate the cover.
6. one kind according to claim 4 can be graphitized equipment with the carbon fiber microwave of Continuous maching, it is characterised in that:
Quartz glass tube is equipped in the microwave heating chamber body, carbon fibre tow continues through microwave heating chamber in quartz glass tube
Body carries out microwave heating.
7. one kind according to claim 1 can be graphitized equipment with the carbon fiber microwave of Continuous maching, it is characterised in that: institute
The temperature measuring equipment stated carries out temperature measurement using non-contact laser aiming infrared thermometer.
8. one kind according to claim 4 can be graphitized equipment with the carbon fiber microwave of Continuous maching, it is characterised in that: will
Multiple identical microwave heating cavitys are connected by metal tube, and each microwave heating cavity is respectively connected with microwave source, carbon fiber wire
Shu Yici is heated by multiple concatenated microwave heating cavitys.
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| WO2006101084A1 (en) * | 2005-03-23 | 2006-09-28 | Bridgestone Corporation | Carbon fiber and processes for (continuous) production thereof, and catalyst structures, electrodes for solid polymer fuel cells, and solid polymer fuel cells, made by using the carbon fiber |
| CN202830266U (en) * | 2012-07-12 | 2013-03-27 | 永虹科技股份有限公司 | Manufacture device of high-module graphite fibers |
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