CN117109301B - Crucible structure for preparing large-aperture silicon carbide powder - Google Patents
Crucible structure for preparing large-aperture silicon carbide powder Download PDFInfo
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- CN117109301B CN117109301B CN202311390727.0A CN202311390727A CN117109301B CN 117109301 B CN117109301 B CN 117109301B CN 202311390727 A CN202311390727 A CN 202311390727A CN 117109301 B CN117109301 B CN 117109301B
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- silicon carbide
- heating
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- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 238000010438 heat treatment Methods 0.000 claims abstract description 139
- 230000009467 reduction Effects 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 12
- 230000007246 mechanism Effects 0.000 claims abstract description 10
- 238000009413 insulation Methods 0.000 claims description 35
- 238000004321 preservation Methods 0.000 claims description 29
- 239000011148 porous material Substances 0.000 claims description 11
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 9
- 238000002791 soaking Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 7
- 244000309464 bull Species 0.000 claims description 5
- 239000002994 raw material Substances 0.000 abstract description 17
- 238000002360 preparation method Methods 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000003786 synthesis reaction Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 230000002194 synthesizing effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
- F27B14/10—Crucibles
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/90—Carbides
- C01B32/914—Carbides of single elements
- C01B32/956—Silicon carbide
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
The invention discloses a crucible structure for preparing large-aperture silicon carbide powder, and particularly relates to the technical field of large-aperture silicon carbide powder preparation. According to the invention, the linked embedded heating mechanism is adopted to enable the speed reduction driving motor to rotate the driving rotating rod, the plurality of guide pushing rods are close to the center point of the first crucible plugging ring, the plurality of first heating rods are inserted into the inner position of the large-aperture silicon carbide powder preparation raw material to form multi-point embedded heating, the plurality of layers are stacked up and down, the powder capacity is greatly increased, the synthesis efficiency is greatly improved, and the large-aperture silicon carbide powder is heated to a specified temperature value according to the accuracy of the first temperature sensor, so that the uniformity of heating the large-aperture silicon carbide powder is better.
Description
Technical Field
The invention relates to the technical field of devices for preparing large-aperture silicon carbide powder, in particular to a crucible structure for preparing large-aperture silicon carbide powder.
Background
In the process of preparing the large-aperture silicon carbide powder, silicon dioxide and graphite are mixed according to a certain proportion, and meanwhile, a proper amount of auxiliary agents such as aluminum oxide, silicon nitride and the like are added to improve the product performance. The layering crucible that it used is cylindric structure, and inside is divided into independent two parts through horizontal crucible bottom, and the upper end at the bottom of the crucible is provided with the crucible bottom, and the cross baffle is provided with the heat conduction scale on the internal face of layering crucible and the lateral wall of cross baffle with the layering crucible inside four independent regions, can play the effect of heating to the large aperture carborundum powder, this is the crucible structure that uses at present.
In the prior published literature, patent publication No. CN211056727U discloses a crucible assembly for synthesizing silicon carbide powder, and aims at the problems that when silicon carbide powder is synthesized in the prior art, when the volume of a crucible is large and the mass of loaded raw materials is large, the gas permeability in the crucible is poor, the heat convection in the crucible is influenced, and therefore the distribution of a thermal field is influenced; the use of the porous graphite sheets ensures that gas can smoothly enter the crucible and powder can not leak out of the air holes or the air guide pipes; the arrangement of the porous graphite sheet greatly improves the permeability of gas in the crucible, is beneficial to stabilizing the uniform distribution of thermal fields in the crucible, and the crucible assembly can be used for synthesizing silicon carbide powder in a large scale and has high yield; however, this crucible assembly has the following drawbacks;
when the crucible assembly is used for preparing large-aperture silicon carbide powder, the large-aperture silicon carbide powder needs to be heated sequentially from outside to inside after the crucible is heated, so that the inside of the raw material for preparing the large-aperture silicon carbide powder is difficult to be heated rapidly and uniformly, the heating uniformity is poor, and the crucible structure for preparing the large-aperture silicon carbide powder needs to be provided.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a crucible structure for preparing large-aperture silicon carbide powder.
In order to achieve the above purpose, the present invention provides the following technical solutions: the crucible structure for preparing the large-aperture silicon carbide powder comprises a rotary linkage turntable, wherein the top end of the rotary linkage turntable is provided with a plurality of guide inclined hole sites in a penetrating way in a circular ring shape, a guide pushing rod is connected inside the guide inclined hole sites in a sliding way, and the top end of the guide pushing rod is provided with a linkage embedded heating mechanism;
the linkage embedded heating mechanism comprises a first heating rod arranged at the top end of a guide pushing rod, a linkage toothed ring and a limiting branch ring are sequentially arranged at the bottom end of a rotary linkage rotary table from top to bottom, a driving gear is connected to one side of the outer wall of the linkage toothed ring in a meshed transmission manner, a driving rotary rod is fixedly connected to the inner wall of the driving gear, a speed reduction driving motor is coaxially connected to the bottom end of the driving rotary rod, a heat insulation sleeve in rotary linkage rotary table is arranged on the inner wall of the rotary linkage rotary table, a vertical heat supply assembly is arranged in the heat insulation sleeve, a superposition soaking assembly is arranged at the top end of the first heating rod, the linkage toothed ring and the rotary linkage rotary table are fixedly connected, and a plurality of first heating rods are distributed and arranged at equal intervals.
Preferably, the bottom of heat preservation insulation sleeve is equipped with the crucible heat preservation base that is used for playing the supporting role to spacing ring, fixed connection between crucible heat preservation base and heat preservation insulation sleeve and the spacing ring respectively, the first support frame of fixedly connected with between gear drive motor and the crucible heat preservation base, and the bottom of crucible heat preservation base runs through and has seted up the inlet port, the controller is installed to gear drive motor's outer wall one side, and fixed connection between controller and the gear drive motor.
Through adopting above-mentioned technical scheme, the controller starts the gear drive motor drive, first support frame plays the supporting role to gear drive motor, gear drive motor plays rotatory effect to the drive bull stick, gear drive motor drives the drive bull stick forward rotation, the drive bull stick drives the positive rotation of linkage ring gear, the linkage ring gear drives rotatory linkage carousel rotation, rotatory linkage carousel drives a plurality of direction slope hole sites and rotates, the direction slope hole site plays the direction removal effect to the direction catch bar, a plurality of direction catch bars are close to the centre of a circle point position department of first crucible spliced ring, a plurality of first heating rods insert the inside position heating of large aperture carborundum powder preparation raw materials.
Preferably, the superposition soaking subassembly includes the linkage post of fixed mounting on first heating rod top, the top of linkage post is equipped with second heating rod and linkage branch and third heating rod in proper order from the bottom up, the outside of first heating rod just keeps away from direction push rod position department fixedly connected with first crucible plug ring, the one end of first heating rod runs through heat preservation insulation sleeve and extends to first crucible plug ring inside position department, is equipped with second crucible plug ring and third crucible plug ring in proper order from the bottom up in the top of first crucible plug ring, first temperature sensor of first heating rod inner wall one side embedding fixedly connected with, and the bottom fixedly connected with crucible base of first crucible plug ring, horizontal sliding connection between first crucible plug ring and the first heating rod, and horizontal sliding connection between second crucible plug ring and the second heating rod, horizontal sliding connection between third plug ring and the third heating rod, fixed connection between linkage post and the second heating rod, linkage branch respectively with third heating rod and heat preservation sleeve and horizontal sliding connection.
Through adopting above-mentioned technical scheme, first heating rod drives the linkage post simultaneously and removes, the linkage post drives the second heating rod and makes linkage branch right shift, linkage branch drives the third heating rod and moves right, the second heating rod moves right along the inside of heat preservation insulation cover and second crucible grafting ring, simultaneously the third heating rod moves right along the inside of heat preservation insulation cover and third crucible grafting ring, can make a plurality of second heating rods be close to second crucible grafting ring's centre point position department relatively, and a plurality of third heating rods can be close to third crucible grafting ring centre point position department, the third heating rod can carry out even multiposition heating to the big aperture silicon carbide powder raw materials upper portion.
Preferably, the vertical heating assembly is including installing the inside crucible lid of heat preservation insulation cover, the top fixedly connected with location crucible cover of crucible cover, the top of location crucible cover is the ring and is equipped with a plurality of vertical resistance heating bars that run through the crucible cover, the bottom fixedly connected with second temperature sensor at vertical resistance heating bar, and the top fixedly connected with linkage screw rod of vertical resistance heating bar, and the inside of linkage screw rod is equipped with the screw thread lantern ring branch piece of being connected with the rotation of location crucible cover, the coaxial transmission in top of screw thread lantern ring branch piece is connected with gear motor, the top of heat preservation insulation cover is a plurality of location branch pieces of rectangle equidistance fixedly connected with, and vertical slip grafting has the locating plate that cup joints between two adjacent location branch pieces, cup joint the top of locating plate and be located screw thread lantern ring branch piece one side position department and install the second support frame, the second support frame respectively with gear motor and cup joint fixedly connected between the locating plate, vertical resistance heating bar respectively with vertical sliding connection between location crucible cover and the crucible cover, a plurality of location cover is the ring and distributes and arranges the setting, the location cover is the equidistant between the crucible cover and is a plurality of heater and a plurality of equal distance between the equal heat insulation cover and the equal heat insulation cover.
Through adopting above-mentioned technical scheme, play vertical location grafting to cup jointing the locating plate through two location supporting pieces, and cup jointing the locating plate and play spacing support to screw thread lantern ring supporting piece, the second support frame plays the supporting role to gear motor, gear motor drive screw thread lantern ring supporting piece is cup jointing the inside corotation of locating plate, gear motor drives the linkage screw rod and moves down under the effect of screw thread, the linkage screw rod drives a plurality of vertical resistance heating bars simultaneously and moves down along location crucible cover inside and the inside guide of crucible cover, second temperature sensor inserts down inside the large aperture carborundum powder material, form multilayer even heating.
The invention has the technical effects and advantages that:
according to the invention, the linkage embedded heating mechanism is adopted to enable the speed reduction driving motor to have a rotating effect on the driving rotating rod, the speed reduction driving motor drives the driving rotating rod to rotate positively, the driving rotating rod drives the linkage toothed ring to rotate positively, the linkage rotating disc drives the plurality of guiding inclined hole sites to rotate, the guiding inclined hole sites play a guiding movement role on the guiding pushing rods, the plurality of guiding pushing rods approach to the circle center point of the first crucible plugging ring, the plurality of first heating rods are inserted into the inner position of the raw material for preparing the large-aperture silicon carbide powder to form multi-point embedded heating, and the large-aperture silicon carbide powder is heated to a specified temperature value accurately according to the first temperature sensor, so that the uniformity of heating the large-aperture silicon carbide powder is better;
according to the invention, the first heating rod drives the linkage column to move simultaneously by utilizing the superposition soaking component, the linkage column drives the second heating rod to enable the linkage support rod to move rightwards, the linkage support rod drives the third heating rod to move rightwards, the first heating rod drives the linkage column to drive the second heating rod to move rightwards, the linkage support rod drives the third heating rod to move rightwards, a plurality of second heating rods are relatively close to the center point of the second crucible plugging ring, the third heating rod can uniformly heat the upper part of the large-aperture silicon carbide powder material, a plurality of second heating rods can heat the middle part of the large-aperture silicon carbide powder material in a multi-point manner, multiple layers of linkage heating can be formed from bottom to top, the heating distribution uniformity is better, the first crucible plugging ring, the second crucible plugging ring and the third crucible plugging ring are stacked up and down, the powder capacity is greatly increased, and the synthesis efficiency is greatly improved;
according to the invention, the vertical heat supply assembly is adopted, the two positioning support blocks are used for vertically positioning and splicing the sleeved positioning plate, the sleeved positioning plate is used for limiting and supporting the threaded sleeve support blocks, the speed reducing motor drives the threaded sleeve support blocks to rotate forward in the sleeved positioning plate, the linkage screw rod drives the plurality of vertical resistance heating rods to move downwards along the inside of the positioning crucible sleeve and the inside of the crucible cover, and the large-aperture silicon carbide powder raw materials can be uniformly heated from multiple layers of longitudinal embedding, so that the large-aperture silicon carbide powder raw materials are vertically heated, the heating is more uniform, and the heating efficiency is effectively improved;
through the mutual influence of a plurality of structures, firstly, insert the inside position of big aperture carborundum powder preparation raw materials through a plurality of first heating rods and form the embedded heating of multiposition, rethread third heating rod can carry out even multiposition heating to big aperture carborundum powder raw materials upper portion, a plurality of further second heating rods can realize multiposition heating to big aperture carborundum powder raw materials middle part, finally move down along location crucible cover inside and crucible cover inside direction through a plurality of vertical resistance heating rods, can form multilayer stack embedded heating to big aperture carborundum powder, and from top to bottom distributes the interval heating in proper order, make big aperture carborundum powder heated uniformity obtain effectively improving.
Drawings
FIG. 1 is a schematic diagram showing the overall structure of a crucible for preparing large-aperture silicon carbide powder according to the present invention.
FIG. 2 is a schematic bottom view of a crucible structure for preparing large-pore silicon carbide powder according to the present invention.
Fig. 3 is a schematic view showing a bottom view of a truncated partial structure of a rotary linkage turntable in a crucible structure for preparing large-aperture silicon carbide powder.
FIG. 4 is a schematic vertical sectional view of a crucible structure for preparing large-aperture silicon carbide powder according to the present invention.
FIG. 5 is a schematic view showing a partial structure of a joint between a third heating rod and a heat-insulating sleeve in a crucible structure for preparing large-aperture silicon carbide powder.
FIG. 6 is a schematic top view of a crucible structure for preparing large pore size silicon carbide powder according to the present invention.
Fig. 7 is a schematic view of a vertical heating assembly in a crucible structure for preparing large-aperture silicon carbide powder according to the present invention.
The reference numerals are: 1. rotating the linkage turntable; 2. guiding the inclined hole site; 3. a guide pushing rod; 4. a first heating rod; 5. a linkage toothed ring; 6. a limit support ring; 7. a drive gear; 8. driving the rotating rod; 9. a reduction driving motor; 10. a first support frame; 11. a crucible heat preservation base; 12. an air inlet hole; 13. a heat preservation and insulation sleeve; 14. a crucible base; 15. a first crucible insert ring; 16. a second crucible insert ring; 17. a third crucible insert ring; 18. a crucible cover; 19. a linkage column; 20. a second heating rod; 21. a linkage strut; 22. a third heating rod; 23. a first temperature sensor; 24. positioning a crucible sleeve; 25. a vertical resistance heating rod; 26. a second temperature sensor; 27. a threaded collar support block; 28. a linkage screw; 29. a speed reducing motor; 30. a second support frame; 31. sleeving a positioning plate; 32. positioning the support block; 33. a controller; 34. a heater.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The crucible structure for preparing the large-aperture silicon carbide powder is provided with a linkage embedded heating mechanism, a superposition soaking component and a vertical heat supply component, wherein the arrangement of each mechanism and the components can form multilayer superposition embedded heating when preparing the large-aperture silicon carbide powder, and the heating uniformity of the large-aperture silicon carbide powder is effectively improved by sequentially distributing and heating from top to bottom, and the specific structures of each mechanism and the components are as follows:
in some embodiments, as shown in fig. 1-4, the linkage embedded heating mechanism comprises a first heating rod 4 arranged at the top end of a guiding pushing rod 3, a linkage toothed ring 5 and a limiting support ring 6 are sequentially arranged at the bottom end of a rotary linkage rotary table 1 from top to bottom, a driving gear 7 is connected to one side of the outer wall of the linkage toothed ring 5 in a meshed transmission manner, a driving rotary rod 8 is fixedly connected to the inner wall of the driving gear 7, a reduction driving motor 9 is connected to the bottom end of the driving rotary rod 8 in a coaxial transmission manner, a heat insulation sleeve 13 in rotary connection is arranged on the inner wall of the rotary linkage rotary table 1, a vertical heat supply assembly is arranged in the heat insulation sleeve 13, and a superposition soaking assembly is arranged at the top end of the first heating rod 4.
In some embodiments, as shown in fig. 1-3, a crucible insulation base 11 for supporting the limiting support ring 6 is arranged at the bottom end of the insulation sleeve 13, the crucible insulation base 11 is fixedly connected with the insulation sleeve 13 and the limiting support ring 6 respectively, a first support frame 10 is fixedly connected between the reduction drive motor 9 and the crucible insulation base 11, an air inlet hole 12 is formed through the bottom end of the crucible insulation base 11, so that ammonia gas is conveniently docked on the air inlet hole 12 at the bottom end of the crucible insulation base 11 and enters into the through hole in the crucible base 14, the first support frame 10 plays a role in supporting the reduction drive motor 9, the stability of the reduction drive motor 9 is improved, a controller 33 is mounted on one side of the outer wall of the reduction drive motor 9, and the controller 33 is fixedly connected with the reduction drive motor 9, so that the controller 33 can control the reduction drive motor 9 to drive or stop running, and the controller 33 plays a role in controlling.
In some embodiments, as shown in fig. 4-5, the superimposed soaking component comprises a linkage column 19 fixedly installed at the top end of the first heating rod 4, a second heating rod 20, a linkage supporting rod 21 and a third heating rod 22 are sequentially arranged above the linkage column 19 from bottom to top, a first crucible inserting ring 15 is fixedly connected to the outside of the first heating rod 4 and away from the position of the guide pushing rod 3, a second crucible inserting ring 16 and a third crucible inserting ring 17 are sequentially arranged above the first crucible inserting ring 15 from bottom to top, a first temperature sensor 23 is fixedly connected to one side of the inner wall of the first heating rod 4 in an embedded manner, a crucible base 14 is fixedly connected to the bottom end of the first crucible inserting ring 15, a horizontal sliding connection is formed between the first crucible inserting ring 15 and the first heating rod 4, a horizontal sliding connection is formed between the second crucible inserting ring 16 and the second heating rod 20, a horizontal sliding connection is formed between the third crucible inserting ring 17 and the third heating rod 22, a horizontal sliding connection is formed between the linkage column 19 and the second heating rod 20, a supporting rod 21 and the third heating rod 22 are respectively connected to the second heating rod 20 in a horizontal sliding connection, and a thermal insulation sleeve 13 is connected to the second heating rod 4 in a sliding manner.
In some embodiments, as shown in fig. 4-7, the vertical heat supply assembly comprises a crucible cover 18 installed inside a heat insulation sleeve 13, a positioning crucible sleeve 24 is fixedly connected to the top end of the crucible cover 18, a plurality of vertical resistance heating rods 25 penetrating through the crucible cover 18 are arranged on the top end of the positioning crucible sleeve 24 in a circular ring, a second temperature sensor 26 is fixedly connected to the bottom end of the vertical resistance heating rods 25, a linkage screw 28 is fixedly connected to the top ends of the vertical resistance heating rods 25, a threaded collar support block 27 in rotary connection with the positioning crucible sleeve 24 is arranged inside the linkage screw 28, a speed reducing motor 29 is coaxially connected to the top ends of the threaded collar support blocks 27, the top of heat preservation insulating sheath 13 is rectangle equidistance fixedly connected with a plurality of location supporting pieces 32, vertical slip grafting has cup jointed locating plate 31 between two adjacent location supporting pieces 32, cup joint the top of locating plate 31 and be located screw thread lantern ring supporting piece 27 one side position department and install second support frame 30, fixed connection between second support frame 30 and gear motor 29 and the cup jointed locating plate 31 respectively, vertical resistance heating rod 25 respectively with location crucible cover 24 and crucible cover 18 between vertical sliding connection, a plurality of location crucible covers 24 are the equidistant distributed arrangement of ring and set up, the position department is the equidistant distributed of ring and has a plurality of heaters 34 between heat preservation insulating sheath 13 and the crucible cover 18, a plurality of heaters 34 all with the heat preservation insulating sheath 13 between fixed connection.
The crucible structure for preparing the large-aperture silicon carbide powder provided by the invention has the following working principle:
when the large-aperture silicon carbide powder is prepared, a large-aperture silicon carbide powder raw material is placed above a crucible base 14, the large-aperture silicon carbide powder raw material is mainly silicon dioxide and graphite, a proper amount of silicon nitride is added at the same time to improve the product performance, the first crucible plugging ring 15, the second crucible plugging ring 16 and the third crucible plugging ring 17 are vertically plugged and overlapped, a crucible cover 18 covers the upper surface position of the third crucible plugging ring 17, the second crucible plugging ring 16 and the first crucible plugging ring 15 are heated by a plurality of heaters 34, and ammonia gas is abutted on an air inlet hole 12 at the bottom end of a crucible heat insulation base 11 and enters into an inner through hole of the crucible base 14;
when the bottom multi-point position is uniformly heated, the controller 33 starts the speed reduction driving motor 9 to drive, the first supporting frame 10 is supported by the crucible heat insulation base 11, the first supporting frame 10 is used for supporting the speed reduction driving motor 9, the speed reduction driving motor 9 is used for rotating the driving rotating rod 8, the speed reduction driving motor 9 drives the driving rotating rod 8 to rotate positively, the driving rotating rod 8 drives the linkage toothed ring 5 to rotate positively, the linkage toothed ring 5 drives the rotary linkage turntable 1 to rotate, the rotary linkage turntable 1 drives the plurality of guiding inclined hole sites 2 to rotate, the guiding inclined hole sites 2 are used for guiding and moving the guiding pushing rods 3, the plurality of guiding pushing rods 3 are close to the center point position of the first crucible plugging ring 15, and the plurality of first heating rods 4 are inserted into the inner position of the large-aperture silicon carbide powder preparation raw material, so that multi-point position uniform heating is realized;
when the double-layer linkage heating is performed, the first heating rods 4 drive the linkage columns 19 to move at the same time, the linkage columns 19 drive the second heating rods 20 to enable the linkage support rods 21 to move right, the linkage support rods 21 drive the third heating rods 22 to move right, the second heating rods 20 move right along the inside of the heat insulation sleeve 13 and the second crucible plugging ring 16, meanwhile, the third heating rods 22 move right along the inside of the heat insulation sleeve 13 and the third crucible plugging ring 17, namely, the second heating rods 20 are relatively close to the center point of the second crucible plugging ring 16, the third heating rods 22 can be close to the center point of the third crucible plugging ring 17, the third heating rods 22 can uniformly heat the upper part of the large-aperture silicon carbide powder material in a multi-point manner, the second heating rods 20 can heat the middle part of the large-aperture silicon carbide powder material in a multi-point manner, and the first temperature sensor 23 is controlled to be 900 ℃;
when the vertical multi-point butt joint is heated, the vertical positioning plug connection is realized through the two positioning support blocks 32 on the sleeved positioning plate 31, the sleeved positioning plate 31 plays a limiting support role on the threaded sleeve ring support block 27, the second support frame 30 plays a supporting role on the gear motor 29, the gear motor 29 drives the threaded sleeve ring support block 27 to rotate positively in the sleeved positioning plate 31, the gear motor 29 drives the linkage screw 28 to move downwards under the action of threads, meanwhile, the linkage screw 28 drives the plurality of vertical resistance heating rods 25 to move downwards along the inside of the positioning crucible sleeve 24 and the inside of the crucible cover 18, the vertical resistance heating rods 25 drive the second temperature sensor 26 to be inserted downwards into the large-aperture silicon carbide powder raw materials, multiple layers of longitudinal embedded uniform heating can be formed on the large-aperture silicon carbide powder raw materials, and the vertical multi-point embedded heating can be realized, the large-aperture silicon carbide powder raw materials can be heated more uniformly, and the heating efficiency is effectively improved.
The details not described in detail in the specification belong to the prior art known to those skilled in the art, and model parameters of each electric appliance are not specifically limited and can be determined by using conventional equipment.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The utility model provides a crucible structure for preparing large aperture carborundum powder, includes rotatory linkage carousel (1), the top of rotatory linkage carousel (1) is the ring and runs through and offer a plurality of direction slope hole sites (2), the inside sliding connection of direction slope hole site (2) has direction push rod (3), its characterized in that: the top end of the guide pushing rod (3) is provided with a linkage embedded heating mechanism;
linkage embedding heating mechanism is including setting up first heating rod (4) on direction catch bar (3) top, is equipped with linkage ring gear (5) and spacing branch ring (6) in proper order from the top down in the bottom of rotatory linkage carousel (1), and the outer wall one side meshing transmission of linkage ring gear (5) is connected with drive gear (7), the inner wall fixedly connected with drive bull stick (8) of drive gear (7), is connected with gear drive motor (9) in the coaxial transmission of the bottom of drive bull stick (8), the inner wall of rotatory linkage carousel (1) is equipped with heat preservation insulation sleeve (13) that rotate to be connected, and the internally mounted of heat preservation insulation sleeve (13) has vertical heating component, stack soaking component is installed on the top of first heating rod (4).
2. A crucible structure for preparing large pore size silicon carbide powder as claimed in claim 1, wherein: the linkage toothed ring (5) is fixedly connected with the rotary linkage turntable (1), the linkage toothed ring (5) is rotationally connected with the limiting support ring (6), and the plurality of first heating rods (4) are distributed and arranged in an equal distance in a circular ring mode.
3. A crucible structure for preparing large pore size silicon carbide powder as claimed in claim 1, wherein: the bottom of heat preservation insulating sheath (13) is equipped with crucible heat preservation base (11) that are used for playing the supporting role to spacing branch ring (6), fixed connection between crucible heat preservation base (11) and heat preservation insulating sheath (13) and spacing branch ring (6) respectively, fixedly connected with first support frame (10) between gear drive motor (9) and crucible heat preservation base (11), and the bottom of crucible heat preservation base (11) runs through and has seted up inlet port (12).
4. A crucible structure for preparing large pore size silicon carbide powder as claimed in claim 1, wherein: a controller (33) is arranged on one side of the outer wall of the speed reduction driving motor (9), and the controller (33) is fixedly connected with the speed reduction driving motor (9).
5. A crucible structure for preparing large pore size silicon carbide powder as claimed in claim 1, wherein: the heating device comprises a heating rod (4), and is characterized in that the superimposed soaking assembly comprises a linkage column (19) fixedly mounted at the top end of the first heating rod (4), a second heating rod (20), a linkage supporting rod (21) and a third heating rod (22) are sequentially arranged above the linkage column (19) from bottom to top, a first crucible plug-in ring (15) is fixedly connected to the outside of the first heating rod (4) and away from a position of a guide pushing rod (3), one end of the first heating rod (4) penetrates through a heat insulation sleeve (13) and extends to the position inside the first crucible plug-in ring (15), a second crucible plug-in ring (16) and a third crucible plug-in ring (17) are sequentially arranged above the first crucible plug-in ring (15) from bottom to top, a first temperature sensor (23) is fixedly connected to one side of the inner wall of the first heating rod (4), a base (14) is fixedly connected to the bottom end of the first crucible plug-in ring (15), a horizontal sliding connection is arranged between the first plug-in ring (15) and the first heating rod (4), and the second crucible plug-in ring (16) and the third crucible plug-in ring (17) are connected with the horizontal sliding connection between the first crucible plug-in ring (20).
6. A crucible structure for preparing large pore size silicon carbide powder as claimed in claim 5, wherein: the linkage column (19) is fixedly connected with the second heating rod (20), and the linkage support rod (21) is fixedly connected with the third heating rod (22) and the second heating rod (20) respectively.
7. A crucible structure for preparing large pore size silicon carbide powder as claimed in claim 5, wherein: the third heating rod (22), the second heating rod (20) and the first heating rod (4) are horizontally connected with the heat insulation sleeve (13) in a sliding mode.
8. A crucible structure for preparing large pore size silicon carbide powder as claimed in claim 1, wherein: the utility model provides a vertical heating supply subassembly is including installing crucible lid (18) inside at heat preservation insulation sleeve (13), the top fixedly connected with location crucible cover (24) of crucible lid (18), the top of location crucible cover (24) is the ring and is equipped with a plurality of vertical resistance heating rod (25) that run through crucible lid (18), bottom fixedly connected with second temperature sensor (26) at vertical resistance heating rod (25), and the top fixedly connected with linkage screw rod (28) of vertical resistance heating rod (25), and the inside of linkage screw rod (28) is equipped with screw thread lantern ring supporting shoe (27) of being connected with location crucible cover (24) rotation, the top coaxial transmission of screw thread lantern ring supporting shoe (27) is connected with gear motor (29), the top of heat preservation insulation sleeve (13) is rectangle equidistance fixedly connected with a plurality of location supporting shoes (32), vertical slip grafting locating plate (31) have between two adjacent location supporting shoes (32), second support frame (30) are installed on the top and are located screw thread lantern ring supporting shoe (27) one side position department, second support frame (30) and fixed connection cup joint between second support frame (31) and the locating plate (29) respectively.
9. A crucible structure for preparing large pore size silicon carbide powder as claimed in claim 8, wherein: the vertical resistance heating rods (25) are respectively connected with the positioning crucible sleeves (24) and the crucible cover (18) in a vertical sliding mode, and a plurality of the positioning crucible sleeves (24) are distributed and arranged in an equidistant mode in a circular ring mode.
10. A crucible structure for preparing large pore size silicon carbide powder as claimed in claim 8, wherein: a plurality of heaters (34) are distributed at equal intervals in a circular ring at the position between the heat preservation and heat insulation sleeve (13) and the crucible cover (18), and the heaters (34) are fixedly connected with the heat preservation and heat insulation sleeve (13).
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| CN202311390727.0A CN117109301B (en) | 2023-10-25 | 2023-10-25 | Crucible structure for preparing large-aperture silicon carbide powder |
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| CN202311390727.0A CN117109301B (en) | 2023-10-25 | 2023-10-25 | Crucible structure for preparing large-aperture silicon carbide powder |
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