Silicon carbide long pipe sintering furnace

Abstract

The utility model provides a sintering furnace for a long silicon carbide pipe, and relates to the technical field of machining of the long silicon carbide pipe. Two rectangular grooves are formed in the right end of the fixed bottom plate, and threaded grooves are formed in the four corners of the upper ends of the rectangular grooves of the fixed bottom plate correspondingly. The sintering furnace A and the sintering furnace B can heat the inner wall and the outer wall of the long silicon carbide pipe at the same time, so that the heating temperature of the inner wall and the outer wall of the long silicon carbide pipe is uniform, the whole long silicon carbide pipe is uniformly heated in the sintering process, sintering quality can be improved, internal stress and deformation are reduced, and uniform densification of materials can be promoted through uniform heating; the porosity is reduced, the compactness and the mechanical property of a final product are improved, and the problems that the silicon carbide long pipe needs to be machined by using a sintering furnace, so that the inner wall and the outer wall of the silicon carbide long pipe need to be heated simultaneously, otherwise, the silicon carbide long pipe cracks or deforms possibly in the sintering process due to uneven temperature are solved.

Description

Technical Field

[0001] This utility model relates to the field of silicon carbide long tube processing technology, and in particular to a silicon carbide long tube sintering furnace. Background Technology

[0002] Silicon carbide (SiC) is a material with excellent thermal conductivity, high hardness, and high-temperature resistance, widely used in electronics, optoelectronics, and machinery. Sintering technology is a crucial means of achieving high performance in the preparation of silicon carbide. These sintering furnaces typically employ advanced temperature control technology and material design to ensure uniform high-temperature distribution during sintering, thereby improving the density and mechanical properties of the product. Furthermore, the design of long-tube silicon carbide sintering furnaces requires consideration of atmosphere control within the furnace to prevent oxidation and other chemical reactions of the material. Through rational furnace structure design and efficient energy utilization, long-tube silicon carbide sintering furnaces can meet production efficiency requirements while reducing energy consumption and improving environmental performance.

[0003] During the use of the sintering furnace, since the silicon carbide long tubes need to be processed in the sintering furnace, the inner and outer walls of the silicon carbide long tubes need to be heated simultaneously. Otherwise, uneven temperature may cause cracks or deformation of the silicon carbide long tubes during the sintering process. Utility Model Content

[0004] This utility model relates to a silicon carbide long tube sintering furnace, in which sintering furnace A and sintering furnace B simultaneously heat the inner and outer walls of the silicon carbide long tube, ensuring uniform heating temperature of the inner and outer walls and uniform heating of the entire silicon carbide long tube during sintering. This helps to improve sintering quality, reduce internal stress and deformation, and promote uniform densification of the material, reduce porosity, and improve the density and mechanical properties of the final product. Uniform heating can also reduce the generation of cracks, and harmful gases during the processing of silicon carbide long tubes are collected and prevented from being emitted into the air.

[0005] In a first aspect, this utility model provides a silicon carbide long tube sintering furnace, specifically comprising: a fixed base plate; two rectangular grooves are provided at the right end of the fixed base plate, and threaded grooves are provided at the four corners of the upper end of the rectangular grooves of the fixed base plate; a groove is provided at the left end of the fixed base plate; support blocks are fixedly installed at the two rectangular grooves of the fixed base plate; the upper ends of the two support blocks support a sintering furnace A, and two retaining grooves are provided at the right end of the inner side of the sintering furnace A.

[0006] Sintering furnace B is fixedly installed in the inner cavity of sintering furnace A, and two slots are opened at the right end of sintering furnace B; filling blocks are respectively installed in the two slots of sintering furnace A; an electric push rod is fixedly installed in the middle of the left end of the fixed base plate, a connecting plate is fixedly installed at the upper end of the electric push rod, and through guide holes are opened at both ends of the connecting plate; a sealing plate is fixedly installed on the right side of the connecting plate.

[0007] Furthermore, an acid-base gas absorption tower is fixedly installed in the groove at the left end of the fixed base plate, while a sealing pipe is fixedly installed at the right end of the acid-base gas absorption tower.

[0008] Furthermore, a sealing ring is fixedly installed on the inner wall of the right end of the sealing tube, and symmetrical guide rods are fixedly installed on the left end of the fixed base plate.

[0009] Furthermore, support rings are fixedly installed on the upper ends of the two support blocks respectively, and two side blocks are fixedly installed on both sides of the lower ends of the two support blocks respectively, with through bolts inserted in the middle of the side blocks.

[0010] Furthermore, a fixing plate is fixedly installed at the left port of the sintering furnace A, and an arc-shaped positioning plate is fixedly installed at the upper left end of the fixing plate.

[0011] Furthermore, the fixed plate has through-holes evenly distributed in the middle, and the right port of the sintering furnace A is fitted with a snap-fit ​​sealing cover, while a pull ring is fixedly installed on the right side of the sealing cover.

[0012] This utility model provides a silicon carbide long tube sintering furnace, which has the following beneficial effects:

[0013] In this invention, during the use of the sintering furnaces, sintering furnace A and sintering furnace B simultaneously heat the inner and outer walls of the silicon carbide long tube, ensuring uniform heating temperature of the inner and outer walls and uniform heating of the entire silicon carbide long tube during the sintering process. This helps improve sintering quality, reduce internal stress and deformation, and promotes uniform densification of the material, reduces porosity, and improves the density and mechanical properties of the final product. Uniform heating also reduces the generation of cracks, and harmful gases generated during the processing of the silicon carbide long tube are collected and prevented from being released into the air.

[0014] The silicon carbide tubes are processed and shaped by passing through the tube walls of sintering furnaces A and B at high temperatures. After the silicon carbide tubes are processed, the sealing plate is moved downwards. At this time, the gas in sintering furnace A will be discharged from the exhaust port. The acid and alkali gas absorption tower absorbs the gas discharged from the exhaust port. If the acid and alkali gases are directly discharged into the air, they will cause serious air pollution. Contact with these gases may cause harm to operators and equipment. Attached Figure Description

[0015] To more clearly illustrate the technical solution of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0016] In the attached diagram:

[0017] Figure 1 A schematic diagram of the right front upper axis view structure of this application is shown;

[0018] Figure 2 This paper shows a schematic diagram of the disassembled structure of the sintering furnace A and the electric pusher section of this application;

[0019] Figure 3 A schematic diagram of the disassembled structure of part A of the sintering furnace of this application is shown;

[0020] Figure 4 A schematic diagram of the exploded structure of this application is shown.

[0021] List of reference numerals

[0022] 1. Fixed base plate; 101. Acid and alkali gas absorption tower; 102. Sealing pipe; 103. Sealing ring; 104. Guide rod; 2. Support block; 201. Support ring; 202. Side block; 3. Sintering furnace A; 301. Sintering furnace B; 302. Filling block; 303. Fixed plate; 304. Positioning plate; 305. Exhaust hole; 306. Sealing cover; 4. Electric push rod; 401. Connecting plate; 402. Guide hole; 403. Sealing plate. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] Example 1: Please refer to Figures 1 to 4 :

[0025] This utility model proposes a silicon carbide long tube sintering furnace, comprising: a fixed base plate 1; two rectangular grooves are formed on the right end of the fixed base plate 1, and threaded grooves are formed at the four corners of the upper end of the rectangular grooves of the fixed base plate 1; a groove is formed on the left end of the fixed base plate 1; support blocks 2 are fixedly installed at the two rectangular grooves of the fixed base plate 1 respectively; the upper end of the two support blocks 2 supports the sintering furnace A3, and two slots are formed on the right end of the inner side of the sintering furnace A3; an electric push rod 4 is fixedly installed in the middle of the left end of the fixed base plate 1, and the electric push rod 4 is used to push the connecting plate 401 and the closing plate 403 upward. When the upper end of the closing plate 403 is aligned with the positioning plate 3... When the concave surfaces of 04 are in contact, the sealing plate 403 will stop moving upward. At this time, the sealing plate 403 will completely seal the exhaust port 305. Then, the sintering furnace A3 will process the silicon carbide long tube. After the silicon carbide long tube is processed, the sealing plate 403 will move downward. At this time, the gas in the sintering furnace A3 will be discharged from the exhaust port 305. The acid and alkali gas absorption tower 101 will absorb the gas discharged from the exhaust port 305. The upper end of the electric push rod 4 is fixedly installed with a connecting plate 401, and the two ends of the connecting plate 401 are respectively provided with through guide holes 402. The right side of the connecting plate 401 is fixedly installed with a sealing plate 403.

[0026] An acid-base gas absorption tower 101 is fixedly installed in the groove at the left end of the fixed base plate 1. Acidic or alkaline gases, including nitrogen oxides and sulfur oxides, may be generated during the processing of silicon carbide long tubes. The acid-base gas absorption tower 101 can effectively absorb and remove these harmful gases, reducing environmental pollution. A sealing pipe 102 is fixedly installed at the right end of the acid-base gas absorption tower 101. Gases in the sintering furnace A3 are absorbed by the acid-base gas absorption tower 101 through the sealing pipe 102. A sealing ring 103 is fixedly installed on the inner wall of the right end of the sealing pipe 102, and the sealing ring 103 wraps around the annular sidewall of the fixed plate 303. Symmetrical guide rods 104 are fixedly installed at the left end of the fixed base plate 1. The guide rods 104 slide through the guide holes 402. When the connecting plate 401 slides up and down, the connecting... The guide hole 402 on plate 401 is restricted by the guide rod 104, so the connecting plate 401 can only slide up and down to prevent it from tilting when sliding up and down. The sealing plate 403 will also tilt and cannot be stably sealed at the exhaust hole 305. The upper ends of the two support blocks 2 are respectively fixedly installed with support rings 201. The two support rings 201 are fitted on the sintering furnace A3 to provide stable support for the sintering furnace A3. The lower ends of the two support blocks 2 are respectively fixedly installed with two side blocks 202. The middle of the side block 202 is inserted with a through bolt. The bolt on the side block 202 is rotated and inserted into the threaded groove of the fixed base plate 1 to fix and restrict the side block 202 and the support block 2. When the support block 2 is touched, it will not move. In this way, the support block 2 can stably support the sintering furnace A3.

[0027] Sintering furnace A3 has a sintering furnace B301 fixedly installed inside its inner cavity, and two slots are provided on the right end of sintering furnace B301. The area between the inner wall of sintering furnace A3 and the outer wall of sintering furnace B301 is the processing mold for silicon carbide long tubes. The two filling blocks 302 are moved to the right and pulled out. Then, the silicon carbide is placed in the processing mold between the inner wall of sintering furnace A3 and the outer wall of sintering furnace B301. The two filling blocks 302 are then inserted into the slots of sintering furnace A3 and sintering furnace B301. When sintering furnace A3 and sintering furnace B301 are started, the heating tubes in sintering furnace A3 and sintering furnace B301 generate high temperatures. These high temperatures penetrate the tube walls of sintering furnace A3 and sintering furnace B301, simultaneously affecting the inner and outer walls of the silicon carbide long tubes. After processing and shaping, filling blocks 302 are respectively installed in the two slots of sintering furnace A3; the inner ends of the two filling blocks 302 are respectively installed in the two slots of sintering furnace B301; a fixing plate 303 is fixedly installed at the left port of sintering furnace A3, and an arc-shaped positioning plate 304 is fixedly installed at the upper left end of the fixing plate 303; the upper end of the sealing plate 403 is in contact with the concave surface of the positioning plate 304; the fixing plate 303 has evenly distributed through exhaust holes 305 in the middle; a snap-fit ​​sealing cover 306 is installed at the right port of sintering furnace A3, and a pull ring is fixedly installed on the right side of the sealing cover 306; by using a tool to hook onto the pull ring of the sealing cover 306 and moving it to the right, the sealing cover 306 can be removed from sintering furnace A3.

[0028] Example 2, based on Example 1, such as Figure 1 and Figure 4 As shown, two side blocks 202 are fixedly installed on both sides of the lower end of the two support blocks 2, and a through bolt is inserted in the middle of the side block 202. After removing the side block 202 and the bolt, the support block 2 is fixedly welded to the fixed base plate 1 to stabilize and restrict the support block 2. In this way, the support block 2 will not tilt when touched, avoiding the bolt from loosening and failing to stabilize the support block 2 after long-term use, and also saving the cost of parts.

[0029] The working principle of this embodiment is as follows: During use, the electric push rod 4 pushes the connecting plate 401 and the sealing plate 403 upwards. When the upper end of the sealing plate 403 is in contact with the concave surface of the positioning plate 304, the sealing plate 403 will stop moving upwards. At this time, the sealing plate 403 will completely seal the exhaust port 305. Then, the sintering furnace A3 processes the silicon carbide long tube. The area between the inner tube wall of the sintering furnace A3 and the outer tube wall of the sintering furnace B301 is the processing mold for the silicon carbide long tube. The two filling blocks 302 are moved to the right and pulled out. Then, the silicon carbide is placed on the inner tube wall of the sintering furnace A3 and the outer tube wall of the sintering furnace B301. At the processing mold between the outer tube walls of 1, two filling blocks 302 are inserted into the slots of sintering furnace A3 and sintering furnace B301. Sintering furnace A3 and sintering furnace B301 are started, and the heating tubes in sintering furnace A3 and sintering furnace B301 will generate high temperature. The high temperature passes through the tube walls of sintering furnace A3 and sintering furnace B301 to process and shape the silicon carbide long tube. After the silicon carbide long tube is processed, the sealing plate 403 is moved downward. At this time, the gas in sintering furnace A3 will be discharged from the exhaust port 305. The acid and alkali gas absorption tower 101 absorbs the gas discharged from the exhaust port 305.

[0030] The following points should be noted in this article:

[0031] 1. The accompanying drawings of this utility model embodiment only involve the structure involved in this utility model embodiment; other structures can refer to general designs.

[0032] 2. Where there is no conflict, the embodiments of this utility model and the features in the embodiments can be combined with each other to obtain new embodiments.

[0033] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A silicon carbide long tube sintering furnace, comprising: A fixed base plate (1) is provided; two rectangular slots are provided on the right end of the fixed base plate (1), and threaded slots are provided at the four corners of the upper end of the rectangular slots of the fixed base plate (1); a groove is provided on the left end of the fixed base plate (1); support blocks (2) are fixedly installed at the two rectangular slots of the fixed base plate (1); the upper end of the two support blocks (2) carries a sintering furnace A (3), and two slots are provided on the right end of the inner side of the sintering furnace A (3); a sintering furnace B (301) is fixedly installed in the inner cavity of the sintering furnace A (3), and two slots are provided on the right end of the sintering furnace B (301); a filling block (302) is fixedly installed at the two slots of the sintering furnace A (3); an electric push rod (4) is fixedly installed in the middle of the left end of the fixed base plate (1).

2. The silicon carbide long tube sintering furnace according to claim 1, characterized in that: An acid-base gas absorption tower (101) is fixedly installed in the groove at the left end of the fixed base plate (1), while a sealing pipe (102) is fixedly installed at the right end of the acid-base gas absorption tower (101).

3. The silicon carbide long tube sintering furnace according to claim 2, characterized in that: A sealing ring (103) is fixedly installed on the inner wall of the right end of the sealing tube (102), and symmetrical guide rods (104) are fixedly installed on the left end of the fixed base plate (1).

4. The silicon carbide long tube sintering furnace according to claim 1, characterized in that: Support rings (201) are fixedly installed on the upper ends of the two support blocks (2), and two side blocks (202) are fixedly installed on both sides of the lower ends of the two support blocks (2), with through bolts inserted in the middle of the side blocks (202).

5. A silicon carbide long tube sintering furnace according to claim 1, characterized in that: A fixing plate (303) is fixedly installed at the left port of the sintering furnace A (3), and an arc-shaped positioning plate (304) is fixedly installed at the upper left side of the fixing plate (303).

6. A silicon carbide long tube sintering furnace according to claim 5, characterized in that: The fixed plate (303) has through-holes (305) evenly distributed in the middle. The right end of the sintering furnace A (3) is fitted with a snap-fit ​​sealing cover (306), and a pull ring is fixedly installed on the right side of the sealing cover (306).

7. A silicon carbide long tube sintering furnace according to claim 1, characterized in that: The upper end of the electric push rod (4) is fixedly installed with a connecting plate (401), and the two ends of the connecting plate (401) are respectively provided with through guide holes (402). The right side of the connecting plate (401) is fixedly installed with a sealing plate (403).

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