CN117387368A - Gas distribution system of graphite furnace - Google Patents
Gas distribution system of graphite furnace Download PDFInfo
- Publication number
- CN117387368A CN117387368A CN202311537969.8A CN202311537969A CN117387368A CN 117387368 A CN117387368 A CN 117387368A CN 202311537969 A CN202311537969 A CN 202311537969A CN 117387368 A CN117387368 A CN 117387368A
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- Prior art keywords
- air
- gas
- gas distribution
- distribution
- inlet
- Prior art date
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 28
- 239000010439 graphite Substances 0.000 title claims abstract description 28
- 230000006835 compression Effects 0.000 claims abstract description 47
- 238000007906 compression Methods 0.000 claims abstract description 47
- 238000006243 chemical reaction Methods 0.000 claims abstract description 23
- 238000007789 sealing Methods 0.000 claims description 23
- 238000003825 pressing Methods 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 9
- 230000033001 locomotion Effects 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 75
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 22
- 229910052757 nitrogen Inorganic materials 0.000 description 11
- 238000004891 communication Methods 0.000 description 3
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 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
- F27B17/00—Furnaces of a kind not covered by any preceding group
- F27B17/0016—Chamber type furnaces
- F27B17/0083—Chamber type furnaces with means for circulating the atmosphere
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/06—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
- C01B21/072—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron with aluminium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/06—Forming or maintaining special atmospheres or vacuum within heating chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/06—Forming or maintaining special atmospheres or vacuum within heating chambers
- F27D2007/063—Special atmospheres, e.g. high pressure atmospheres
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
- F27M2003/00—Type of treatment of the charge
- F27M2003/04—Sintering
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The invention relates to a gas distribution system of a graphite furnace, which comprises a gas inlet fan, a gas outlet fan and two reaction devices, wherein the gas distribution system is provided with a gas distribution power piece and two linked gas distribution devices, each gas distribution device comprises a gas distribution inlet and a gas distribution outlet, each gas distribution device comprises a gas distribution box body, an active gas distribution piston and a gas inlet and outlet control assembly, the gas distribution box body is provided with a gas compression cavity, the gas distribution power piece pushes the active gas distribution pistons on the two adjacent gas distribution devices to slide along the gas compression cavity, the gas inlet and outlet control assembly comprises a gas inlet and outlet control rod, when the volume of the gas compression cavity is maximum by sliding the active gas distribution pistons along the gas compression cavity, the gas inlet and outlet control rod opens the gas distribution inlet and opens the gas distribution outlet in the process that the volume of the gas compression cavity is gradually reduced from the maximum by sliding the active piston along the gas compression cavity, the gas inlet and outlet control rod seals the gas distribution inlet, the same gas supply quantity of each reaction device is ensured, and the same product quality is ensured.
Description
The present application is a divisional application of patent application entitled "preparation of graphite furnace from aluminum nitride powder with accurate control of Nitrogen supply", the application date of the original application is 2022-1-19, and the application number is 202210060870.2.
Technical Field
The invention relates to the technical field of aluminum nitride, in particular to a gas distribution system of a graphite furnace.
Background
The reaction sintering furnace is a vacuum resistance furnace using graphite as a heating element, is a sintering furnace for processing aluminum nitride powder, is a large-sized graphite box, places a workpiece to be fired in the graphite box, then vacuumizes the graphite box and heats the graphite box to sinter and shape the workpiece, in the prior art, in order to improve the temperature uniformity, a plurality of small-sized graphite boxes are usually arranged to improve the temperature uniformity, an air inlet pipeline and an air outlet pipeline are required to be connected with the graphite boxes, the connection is inconvenient, and in the working process of the air inlet pipeline and the air outlet pipeline, the air pressure inside each graphite box is unbalanced, the introduced nitrogen amount is difficult to control accurately, and the quality of sintered products is influenced.
Disclosure of Invention
In order to overcome the technical defects in the prior art, the invention provides a gas distribution system of a graphite furnace, which ensures the same gas supply amount of each reaction device and the same product quality.
The technical scheme adopted by the invention is as follows:
the gas distribution system of the graphite furnace comprises a gas inlet fan, a gas outlet fan and two reaction devices, wherein the gas distribution system is provided with a gas distribution power piece and two linked gas distribution devices, each gas distribution device comprises a gas distribution gas inlet and a gas distribution gas outlet, each gas distribution gas inlet is communicated with the gas inlet fan, each gas distribution gas outlet is communicated with the corresponding reaction device, each reaction device is communicated with the gas outlet fan, each gas distribution device comprises a gas distribution box body, a driving gas distribution piston and a gas inlet and outlet control assembly, the gas distribution box body is provided with a gas compression cavity, the gas distribution power piece pushes the driving gas distribution piston on two adjacent gas distribution devices to slide along the gas compression cavity, the gas inlet and outlet control assembly comprises a gas inlet and outlet control rod and a gas inlet and outlet control gear, the gas inlet and outlet control rod is positioned in the gas compression cavity and slides along the gas distribution gas inlet and the gas outlet, the air inlet and exhaust control gear is in transmission connection with the active air distribution piston, the air inlet and exhaust control gear is provided with lifting threads connected with an air inlet and exhaust control rod thread pair, the active air distribution piston is provided with an active air distribution rack meshed with the air inlet and exhaust control gear, the air inlet and exhaust control gear is provided with a limit baffle matched with the active air distribution rack, the limit baffle limits the axial movement of the air inlet and exhaust control gear, the active air distribution piston slides along the air compression cavity to enable the air inlet and exhaust control rod to open the air distribution air inlet to seal the air distribution air outlet when the volume of the air compression cavity is maximum, and the active air distribution piston slides along the air compression cavity to enable the volume of the air compression cavity to be gradually reduced from maximum, and the air inlet is sealed by the air inlet and the air distribution air outlet.
Preferably, a plurality of fillers are arranged in the air compressing cavity.
Preferably, the air distribution device further comprises a passive air distribution piston, wherein the passive air distribution piston slides along the air compression cavity, and a passive air distribution rack meshed with the air inlet and outlet control gear is arranged on the passive air distribution piston.
Preferably, the air distribution power piece is a double-acting air cylinder, and two output ends of the air distribution power piece respectively extend into the air pressing cavity of the corresponding air distribution box body and are in transmission connection with the corresponding active air distribution piston.
Preferably, the air inlet and outlet control rod comprises a rod body, and an air inlet support rod group, an air inlet sealing plug, an air outlet sealing plug and an air outlet support rod group which are sequentially arranged on the rod body, wherein the air inlet support rod group slides along an air distribution air inlet, the air outlet support rod group slides along an air distribution air outlet, and the distance between the air inlet sealing plug and the furthest end of the air outlet sealing plug is larger than the inner diameter of the air compression cavity.
Preferably, the air inlet support rod group and the air outlet support rod group are respectively provided with three support rods distributed at equal angles.
Preferably, the air distribution box body consists of an air distribution cylinder body and sealing covers for sealing two ends of the air distribution cylinder body.
The beneficial effects of the invention are as follows:
the gas distribution system is provided with a gas distribution power piece and two linked gas distribution devices, each gas distribution device comprises a gas distribution inlet and a gas distribution outlet, each gas distribution inlet is communicated with a gas inlet fan, the gas inlet fan blows nitrogen into each gas distribution inlet, each gas distribution outlet is communicated with a corresponding reaction device, nitrogen blown by the gas inlet fan enters the corresponding reaction device through the gas distribution outlet, each reaction device is communicated with an exhaust fan, and then reaction products are pumped out.
Each air distribution device comprises an air distribution box body, an active air distribution piston and an air inlet and outlet control assembly, the air distribution box body is provided with an air compression cavity, the air distribution power piece pushes the active air distribution pistons on two adjacent air distribution devices to slide along the air compression cavity, the volume in the air compression cavity is further changed, the air inlet and outlet control assembly is used for controlling the communication and the sealing of an air distribution air inlet and an air distribution air outlet, the air inlet and outlet control assembly is in transmission connection with the active air distribution pistons, that is, the action of the active air distribution pistons drives the air inlet and outlet control assembly to move.
When the air compression cavity is in air, the air inlet and outlet control assembly opens the air distribution air inlet and the air distribution air outlet are synchronously closed, the air distribution power piece drives the active air distribution piston to slide along the air compression cavity so as to increase the volume of the air compression cavity, the air inlet fan sends nitrogen into the air compression cavity, and when the air compression cavity is out of air, the air inlet and outlet control assembly closes the air distribution air inlet and synchronously opens the air distribution air outlet, the air distribution power piece drives the active air distribution piston to slide along the air compression cavity so as to reduce the volume of the air compression cavity, and the air inlet fan pumps the nitrogen out of the air distribution air outlet from the air compression cavity so as to send the nitrogen into each reaction device.
The method for controlling the opening and closing states of the air distribution air inlet and the air distribution air outlet by the air inlet and the air outlet is as follows: the air inlet and exhaust control assembly comprises an air inlet and exhaust control rod and an air inlet and exhaust control gear, wherein the air inlet and exhaust control rod is positioned in an air compressing cavity, the air inlet and exhaust control rod slides along an air distribution air inlet and an air distribution air outlet, the air inlet and exhaust control gear is in transmission connection with an active air distribution piston, the air inlet and exhaust control rod is provided with lifting threads connected with an air inlet and exhaust control rod thread pair, the active air distribution piston is provided with an active air distribution rack meshed with the air inlet and exhaust control gear, the air inlet and exhaust control gear is provided with a limit baffle matched with the active air distribution rack, the limit baffle limits the axial movement of the air inlet and exhaust control gear, the active air distribution rack drives the air inlet and exhaust control gear to rotate when the active air distribution piston moves, the lifting threads on the air inlet and exhaust control gear drive the air inlet and the air distribution control rod to lift, and the air distribution air outlet are provided with long grooves for limiting the rotation of the air inlet and exhaust control rod, when the active air distribution piston slides along the air compressing cavity to enable the volume of the air compressing cavity to be maximum, the air inlet is sealed, the active air distribution piston slides along the air compressing cavity to enable the volume of the air compressing cavity to be gradually reduced from maximum, the air inlet is sealed, the air outlet is opened, the air inlet is limited by the air outlet is sealed by the active air distribution rod, the air inlet, the axial movement is limited by the lifting threads, the lifting control gear, the air control rod, and the air control rod is rotated, and the air control and the air outlet is driven.
Drawings
FIG. 1 is a schematic view of the installation position of the present invention.
Fig. 2 is a schematic diagram of the overall structure of the air distribution system.
Fig. 3 is a schematic diagram of a gas distribution device.
Fig. 4 is a schematic diagram of the structure of the active air distribution rack and the air inlet and outlet control gear.
Fig. 5 is a schematic view of the structure of the intake and exhaust control lever.
Reference numerals illustrate:
1. an air intake fan;
2. an exhaust fan;
3. a gas distribution system; 31. a gas distribution device; 311. a gas distribution inlet; 312. a gas distribution outlet; 313. an air distribution box body; 3131. a gas distribution cylinder; 3132. sealing cover; 314. an active air distribution piston; 3141. an active gas distribution rack; 315. an air intake and exhaust control assembly; 3151. an air inlet and outlet control rod; 31511. a rod body; 31512. an air inlet support rod group; 31513. an air inlet sealing plug; 31514. an air outlet sealing plug; 31515. an air outlet support rod group; 3152. an air inlet and outlet control gear; 31521. a limit baffle; 32. a gas distribution power piece; 33. a plenum chamber;
4. a graphite feed box;
5. a filler;
6. a passive valve piston.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in fig. 1-5, this embodiment provides a gas distribution system of a graphite furnace, the graphite furnace includes a gas inlet fan 1, an exhaust fan 2 and two reaction devices, the gas distribution system 3 includes a gas distribution power piece 32 and two linked gas distribution devices 31, each gas distribution device 31 includes a gas distribution inlet 311 and a gas distribution outlet 312, each gas distribution inlet 311 is communicated with the gas inlet fan 1, the gas inlet fan 1 blows nitrogen into each gas distribution inlet 311, each gas distribution outlet 312 is communicated with the corresponding reaction device, nitrogen blown by the gas inlet fan 1 enters the corresponding reaction device through the gas distribution outlet 312, each reaction device is communicated with the exhaust fan 2, and then the reaction product is extracted.
Each air distribution device 31 comprises an air distribution box 313, an active air distribution piston 314 and an air inlet and outlet control assembly 315, the air distribution box 313 is provided with an air compression cavity 33, the air distribution power piece 32 pushes the active air distribution pistons 314 on two adjacent air distribution devices 31 to slide along the air compression cavity 33, the air distribution power piece 32 is a double-acting air cylinder, two output ends of the air distribution power piece 32 respectively extend into the air compression cavity 33 of the corresponding air distribution box 313 and are in transmission connection with the corresponding active air distribution pistons 314, the volume in the air distribution cavity 33 is changed, the air inlet and outlet control assembly 315 is used for controlling the communication and the closure of the air distribution air inlet 311 and the air distribution air outlet 312, and the air inlet and outlet control assembly 315 is in transmission connection with the active air distribution pistons 314, that is, the action of the active air distribution pistons 314 drives the air inlet and outlet control assembly 315 to move.
When the air pressing cavity 33 is in air, the air inlet and outlet control assembly 315 opens the air distribution inlet 311 and the air distribution outlet 312 to be synchronously closed, the air distribution power piece 32 drives the active air distribution piston 314 to slide along the air pressing cavity 33 so as to increase the volume of the air pressing cavity 33, the air inlet fan 1 sends nitrogen into the air pressing cavity 33, when the air pressing cavity 33 is out of air, the air inlet and outlet control assembly 315 closes the air distribution inlet 311 and the air distribution outlet 312 to be synchronously opened, the air distribution power piece 32 drives the active air distribution piston 314 to slide along the air pressing cavity 33 so as to reduce the volume of the air pressing cavity 33, and the air inlet fan 1 pumps the nitrogen out of the air distribution outlet 312 from the air pressing cavity 33 so as to be sent into each reaction device.
The motion of the active air distribution piston 314 drives the air inlet and outlet control assembly 315, and the air inlet and outlet control assembly 315 controls the opening and closing states of the air distribution inlet 311 and the air distribution outlet 312 as follows: the air inlet and exhaust control assembly 315 comprises an air inlet and exhaust control rod 3151 and an air inlet and exhaust control gear 3152, wherein the air inlet and exhaust control rod 3151 is positioned in the air pressing cavity 33, the air inlet and exhaust control rod 3151 slides along the air inlet 311 and the air outlet 312, the air inlet and exhaust control gear 3152 is in transmission connection with the active air distribution piston 314, the air inlet and exhaust control gear 3152 is provided with lifting threads connected with a thread pair of the air inlet and exhaust control rod 3151, the active air distribution piston 314 is provided with an active air distribution rack 3141 meshed with the air inlet and exhaust control gear 3152, the air inlet and exhaust control gear 3152 is provided with a limit baffle 31521 matched with the active air distribution rack 3141, the limit baffle 31521 limits the axial movement of the air inlet and exhaust control gear 3152, the active air distribution rack 3141 drives the air inlet and exhaust control gear 3152 to rotate when the active air distribution piston 314 moves, the air inlet and exhaust control gear 3152 and the lifting screw threads on the air inlet and exhaust control gear 3152 drive the air inlet and exhaust control rod 3151 to lift, and it is worth noting that the air inlet 311 and the air outlet 312 are provided with elongated slots (not shown in the figure) for limiting the rotation of the air inlet and exhaust control rod 3151, when the active air distribution piston 314 slides along the air compression cavity 33 to make the volume of the air compression cavity 33 maximum, the air inlet and exhaust control rod 3151 opens the air inlet 311 and seals the air outlet 312, and when the active air distribution piston 314 slides along the air compression cavity 33 to make the volume of the air compression cavity 33 gradually become smaller from maximum, the air inlet and exhaust control rod 3151 seals the air inlet 311 and opens the air outlet 312, and the volumes of the air compression cavities 33 are the same, so that the air supply amounts of the air compression cavities 33 are kept equal, the same air supply amounts of the reaction devices are ensured, and the same product quality is ensured.
In order to increase the reaction speed, the reaction device is provided with a plurality of graphite feed boxes 4, the graphite feed boxes 4 are connected in series through connecting pipelines to form a row, the air inlet of each row of graphite feed boxes 4 is communicated with the air distribution outlet 312 of the corresponding air distribution device 31, the air outlet of each row of graphite feed boxes 4 is communicated with the air exhaust fan 2, and each graphite feed box can be filled with reaction raw materials, so that the reaction speed is increased.
The air distribution device 31 further comprises a passive air distribution piston 6, the air distribution box 313 is composed of an air distribution cylinder 3131 and sealing covers 3132 for sealing two ends of the air distribution cylinder 3131, the sealing covers 3132 are arranged to facilitate installation of the passive air distribution piston 6 and the active air distribution piston 314, the passive air distribution piston 6 slides along the air distribution cavity 33, a passive air distribution rack meshed with an air inlet and outlet control gear 3152 is arranged on the passive air distribution piston 6, a plurality of fillers 5 are arranged in an area, which cannot be reached by the active air distribution piston 314, in the air distribution cavity 33, because the passive air distribution rack and the active air distribution rack 3141 have a certain length, the passive air distribution piston 6 and the active air distribution piston 314 are blocked from being close to each other, and when the passive air distribution piston 6 and the active air distribution piston 314 are close to each other to the nearest positions, the fillers 5 can ensure air exhaustion in the air distribution cavity 33, and the air displacement is ensured to be accurate.
The air inlet and exhaust control rod 3151 comprises a rod body 31511, and an air inlet support rod group 31512, an air inlet sealing plug 31513, an air outlet sealing plug 31514 and an air outlet support rod group 31515 which are sequentially arranged on the rod body 31511, wherein the air inlet support rod group 31512 slides along a long groove in the air distribution air inlet 311 to prevent axial rotation, the air outlet support rod group 31515 slides along the air distribution air outlet 312, the air inlet support rod group 31512 and the air outlet support rod group 31515 are respectively provided with three support rods distributed at equal angles, so that the integral stability of the rod body 31511 is ensured, and the distance between the farthest ends of the air inlet sealing plug 31513 and the air outlet sealing plug 31514 is larger than the inner diameter of the air compression cavity 33, thereby avoiding inaccurate air supply caused by simultaneous communication of the air distribution air inlet 311 and the air distribution air outlet 312.
While the basic principles and main features of the invention and advantages of the invention have been shown and described, it will be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, which are described in the foregoing description merely illustrate the principles of the invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents.
Claims (5)
1. The gas distribution system of the graphite furnace comprises a gas inlet fan, a gas outlet fan and two reaction devices, and is characterized in that the gas distribution system is provided with a gas distribution power piece and two linked gas distribution devices, each gas distribution device comprises a gas distribution gas inlet and a gas distribution gas outlet, each gas distribution gas inlet is communicated with the gas inlet fan, each gas distribution gas outlet is communicated with the corresponding reaction device, each reaction device is communicated with the gas outlet fan, each gas distribution device comprises a gas distribution box body, a driving gas distribution piston and a gas inlet and outlet control assembly, the gas distribution box body is provided with a gas compression cavity, the gas distribution power piece pushes the driving gas distribution piston on the two adjacent gas distribution devices to slide along the gas compression cavity, the gas inlet and outlet control assembly comprises a gas inlet and outlet control rod and a gas inlet and outlet control gear, the gas inlet and outlet control rod is positioned in the gas compression cavity and slides along the gas inlet and the gas distribution gas outlet, the air inlet and exhaust control gear is in transmission connection with the active air distribution piston, the air inlet and exhaust control gear is provided with lifting threads connected with an air inlet and exhaust control rod thread pair, the active air distribution piston is provided with an active air distribution rack meshed with the air inlet and exhaust control gear, the air inlet and exhaust control gear is provided with a limit baffle matched with the active air distribution rack, the limit baffle limits the axial movement of the air inlet and exhaust control gear, the active air distribution piston slides along the air compression cavity to enable the air inlet and exhaust control rod to open the air distribution air inlet to seal the air distribution air outlet when the volume of the air compression cavity is maximum, the active air distribution piston slides along the air compression cavity to enable the volume of the air compression cavity to be gradually reduced from maximum, the air inlet and the air distribution air inlet are sealed by the air inlet and the air distribution outlet are opened, the volumes of all the air compression cavities are the same, so that the air supply amount of all the air compression cavities is kept equal, the same air supply amount of each reaction device is guaranteed, the same product quality is guaranteed, the air inlet and outlet control rod comprises a rod body, and an air inlet support rod group, an air inlet sealing plug, an air outlet sealing plug and an air outlet support rod group which are sequentially arranged on the rod body, wherein the air inlet support rod group slides along an air distribution air inlet, the air outlet support rod group slides along an air distribution air outlet, the distance between the farthest ends of the air inlet sealing plug and the air outlet sealing plug is larger than the inner diameter of the air compression cavity, and the air inlet support rod group and the air outlet support rod group are respectively provided with three support rods distributed at equal angles.
2. A gas distribution system of a graphite furnace as set forth in claim 1 wherein said plenum is provided with a plurality of fillers.
3. A gas distribution system of a graphite furnace according to claim 1, wherein the gas distribution device further comprises a passive gas distribution piston, the passive gas distribution piston slides along the gas compression cavity, and a passive gas distribution rack meshed with the gas inlet and outlet control gear is arranged on the passive gas distribution piston.
4. A gas distribution system of a graphite furnace according to claim 1, wherein the gas distribution power piece is a double-acting cylinder, and two output ends of the gas distribution power piece respectively extend into a gas pressing cavity of a corresponding gas distribution box body to be in transmission connection with a corresponding active gas distribution piston.
5. A gas distribution system of a graphite furnace according to claim 1, wherein the gas distribution box body consists of a gas distribution cylinder body and sealing covers for sealing two ends of the gas distribution cylinder body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311537969.8A CN117387368A (en) | 2022-01-19 | 2022-01-19 | Gas distribution system of graphite furnace |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311537969.8A CN117387368A (en) | 2022-01-19 | 2022-01-19 | Gas distribution system of graphite furnace |
| CN202210060870.2A CN114543523B (en) | 2022-01-19 | 2022-01-19 | Graphite furnace for preparing aluminum nitride powder by accurately controlling nitrogen supply |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210060870.2A Division CN114543523B (en) | 2022-01-19 | 2022-01-19 | Graphite furnace for preparing aluminum nitride powder by accurately controlling nitrogen supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117387368A true CN117387368A (en) | 2024-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210060870.2A Active CN114543523B (en) | 2022-01-19 | 2022-01-19 | Graphite furnace for preparing aluminum nitride powder by accurately controlling nitrogen supply |
| CN202311537969.8A Pending CN117387368A (en) | 2022-01-19 | 2022-01-19 | Gas distribution system of graphite furnace |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202210060870.2A Active CN114543523B (en) | 2022-01-19 | 2022-01-19 | Graphite furnace for preparing aluminum nitride powder by accurately controlling nitrogen supply |
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| CN114543523A (en) | 2022-05-27 |
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