Forming auxiliary device for door-shaped double-helix silicon carbide rod

Abstract

The utility model is applicable to the technical field of silicon carbide rod forming, and provides an auxiliary forming device for a door-shaped double-helix silicon carbide rod, which comprises an industrial tunnel furnace and a silicon carbide rod blank placed on a conveying mesh belt of the industrial tunnel furnace, and an n-shaped top shell is arranged on an input port on the right side of the industrial tunnel furnace. A first shell body, a second shell body and a third shell body are sequentially arranged on the upper surface of the n-shaped top shell from left to right, and the first shell body, the second shell body and the third shell body divide the interior of the n-shaped top shell into a high-temperature area, a medium-temperature area and a low-temperature area from left to right. The silicon carbide rod blank can gradually adapt to the temperature change, the purpose of preheating the silicon carbide rod blank is achieved, the problem that the surface of the silicon carbide rod blank is cracked due to the high temperature when the silicon carbide rod blank is directly conveyed to an industrial tunnel furnace is solved, the pre-drying efficiency and drying balance of the silicon carbide rod blank are improved, and the high yield of the subsequent door-shaped double-helix silicon carbide rod blank is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of silicon carbon rod molding, and more specifically, to a molding auxiliary device for gate-type double-helix silicon carbon rods. Background Art

[0002] Silicon carbon rod is a non-metallic high-temperature electric heating element. It uses high-purity green hexagonal silicon carbide as the main raw material. The double-helix silicon carbon rod inherits the basic characteristics of the silicon carbon rod. At the same time, due to its unique double-helix structure, it improves the heat transfer efficiency, making it widely used in metallurgy, glass, electronics, ceramics, hardware, magnetic materials, refractory materials and other fields.

[0003] The existing preparation process of double-helix silicon carbon rods is to mix high-purity silicon carbide raw materials with industrial silicon, carbon powder, adhesives, binders, water and other materials; then prepare them into double-helix shapes through wet materials. After these wet materials are formed, they need to be transported to an industrial tunnel furnace for high-temperature sintering and shaping. However, the temperature in the industrial tunnel furnace is relatively high. If the double-helix silicon carbon rod blanks are directly transported to the industrial tunnel furnace, cracks and fractures will appear on the surface of the double-helix silicon carbon rod blanks due to the large temperature difference, thereby increasing the scrap rate of the product and affecting the forming effect of the double-helix silicon carbon rod blanks. Summary of the invention

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a molding auxiliary device for gate-type double-helix silicon carbon rods.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A forming auxiliary device for a gate-type double-helix silicon carbon rod comprises an industrial tunnel furnace and a silicon carbon rod blank placed on a conveyor mesh belt of the industrial tunnel furnace, wherein an n-type top shell is arranged on an input port on the right side of the industrial tunnel furnace, a first shell, a second shell and a third shell are arranged on the upper surface of the n-type top shell from left to right in sequence, three exhaust fans for extracting heat from the industrial tunnel furnace are arranged on the front side of the industrial tunnel furnace, a first pipe connected to the interior of the first shell is arranged on the front side of the first shell, the other end of the first pipe is connected to the right exhaust fan output port, a second pipe connected to the interior of the second shell is arranged on the front side of the second shell, the other end of the second pipe is connected to the output port of the middle exhaust fan, a third pipe connected to the interior of the third shell is arranged on the front side of the third shell, the other end of the third pipe is connected to the output port of the left exhaust fan, and the first shell, the second shell and the third shell divide the interior of the n-type top shell from left to right into a high-temperature area, a medium-temperature area and a low-temperature area.

[0007] The utility model is further configured as follows: a filter assembly is arranged inside the first shell, the second shell and the third shell, and the filter assembly includes a drawer, which is arranged on the rear side of the third shell and extends and slides into the interior of the third shell, and a screen for filtering hot air is arranged in the drawer.

[0008] The utility model is further configured as follows: one side of the drawer located in the third shell body is in a square shape, and the outer surface is in contact with the inner wall of the third shell body, and the drawer is located below the third pipe.

[0009] The utility model is further configured as follows: two mounting plates arranged in parallel on the left and right are arranged in the drawer, a plurality of mounting rods are arranged between the two mounting plates, and a cleaning brush for cleaning the surface of the screen is arranged on the lower surface of the mounting rod.

[0010] The utility model is further configured as follows: two connecting slide grooves are provided on the left and right inner walls of the drawer, a connecting slide rod is provided between the front and rear inner walls of the connecting slide groove, a sliding sleeve is provided on the outer surface of the connecting slide rod, one side of the sliding sleeve extends into the drawer and is connected to the mounting plate.

[0011] The utility model is further configured as follows: a tension spring movably sleeved on the outer surface of the connecting slide rod is arranged between the sliding sleeve and the inner wall of the connecting slide groove.

[0012] The utility model is further configured as follows: a rotating shaft is rotatably connected to the inner wall of the third shell, a rotating plate is sleeved on the outer surface of the rotating shaft, a windward plate which is at the same horizontal position as the third pipe is arranged on the upper side of the rotating plate, and a pushing rod which contacts the mounting rod is arranged on the lower side of the rotating plate.

[0013] The advantages of the utility model are:

[0014] First, the utility model divides the inside of the n-type top shell from left to right into a high-temperature area, a medium-temperature area and a low-temperature area through the first shell, the second shell and the third shell. In this way, when the silicon-carbon rod blank is transported from right to left into the industrial tunnel furnace, the silicon-carbon rod blank passes through the low-temperature area, the medium-temperature area and the high-temperature area in the n-type top shell in sequence. In this way, the silicon-carbon rod blank is blown by hot air of different temperatures during transportation, so that the silicon-carbon rod blank can gradually adapt to the temperature change, thereby achieving the purpose of preheating the silicon-carbon rod blank, and avoiding as much as possible the problem of surface cracking caused by the silicon-carbon rod blank being directly transported to the industrial tunnel furnace and being subjected to high temperatures, thereby improving its pre-drying efficiency and drying balance, and improving the high yield rate of subsequent gate-type double-helix silicon-carbon rod blanks.

[0015] Secondly, the utility model blocks impurities in the hot air through the screen, thereby avoiding the impurities from being blown along the hot air to the surface of the silicon carbon rod blank, affecting the quality of the silicon carbon rod blank after forming, and ensuring the forming effect of the silicon carbon rod blank.

[0016] Thirdly, the utility model drives the mounting rod to brush back and forth through the mounting plate, so that the cleaning brush can brush the dust on the screen, thus avoiding the problem of excessive dust blocking the mesh of the screen as much as possible, and ensuring the air permeability of the screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a molding auxiliary device for a gate-shaped double-helix silicon carbon rod according to the utility model;

[0018] Figure 2 A plan view of the internal area division of the n-type top shell of the utility model;

[0019] Figure 3 It is a cross-sectional view of the third housing of the utility model;

[0020] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0021] In the figure: 1. industrial tunnel furnace; 2. silicon carbon rod blank; 3. n-type top shell; 4. first shell; 5. second shell; 6. third shell; 7. first pipeline; 8. second pipeline; 9. third pipeline; 10. exhaust fan; 11. drawer; 12. screen; 13. rotating shaft; 14. windward plate; 15. rotating plate; 16. pushing rod; 17. mounting rod; 18. cleaning brush; 19. mounting plate; 20. connecting slide; 21. connecting slide rod; 22. sliding sleeve; 23. tension spring. DETAILED DESCRIPTION

[0022] See also Figure 1-4 , the utility model provides the following technical solutions:

[0023] Specifically, it refers to a molding auxiliary device for gate-type double-helix silicon carbon rods, including an industrial tunnel furnace 1 and a silicon carbon rod blank 2 placed on the conveyor mesh belt of the industrial tunnel furnace 1. Therefore, the silicon carbon rod blank 2 can be transported to the industrial tunnel furnace 1 through the conveyor mesh belt for high-temperature curing and molding.

[0024] An n-type top shell 3 is arranged on the input port on the right side of the industrial tunnel furnace 1, and the n-type top shell 3 covers the part of the conveyor belt of the industrial tunnel furnace 1 located at the input port. The upper surface of the n-type top shell 3 is provided with a first shell 4, a second shell 5 and a third shell 6 from left to right, and the first shell 4, the second shell 5 and the third shell 6 are all connected to the inside of the n-type top shell 3. The front of the industrial tunnel furnace 1 is provided with three exhaust fans 10 for extracting heat from the inside of the industrial tunnel furnace 1. The three exhaust fans 10 are arranged in parallel on the left and right. The front of the first shell 4 is provided with a The first pipe 7 is provided, and the other end of the first pipe 7 is connected to the output port of the right exhaust fan 10. The front of the second shell 5 is provided with a second pipe 8 connected to the interior thereof, and the other end of the second pipe 8 is connected to the output port of the middle exhaust fan 10. The front of the third shell 6 is provided with a third pipe 9 connected to the interior thereof, and the other end of the third pipe 9 is connected to the output port of the left exhaust fan 10. Therefore, it can be seen that the length of the third pipe 9 is the longest, and the length of the first pipe 7 is the shortest. No insulation measures are provided on the outer surfaces of the first pipe 7, the second pipe 8 and the third pipe 9. Therefore, when the three exhaust fans 10 extract heat from the industrial tunnel furnace 1 at the same time, due to the inconsistent lengths of the first pipe 7, the second pipe 8 and the third pipe 9, it can be seen that the heat loss generated by the first pipe 7, the second pipe 8 and the third pipe 9 when conveying hot air is not consistent. The heat loss conveyed by the first pipe 7 is the smallest, and the heat loss conveyed by the third pipe 9 is the largest. Therefore, the first shell 4, the second shell 5 and the third shell 6 divide the interior of the n-type top shell 3 from left to right into a high temperature area, a medium temperature area and a low temperature area. In this way, the silicon carbon rod blank When being transported from right to left into the industrial tunnel furnace 1, the silicon carbon rod blank 2 passes through the low temperature area, the medium temperature area and the high temperature area in the n-type top shell 3 in turn. In this way, the silicon carbon rod blank 2 is blown by hot air of different temperatures during transportation, so that the silicon carbon rod blank 2 can gradually adapt to the temperature change, so as to achieve the purpose of preheating the silicon carbon rod blank 2, and avoid the problem of surface cracking caused by the silicon carbon rod blank 2 being directly transported to the industrial tunnel furnace 1 and subjected to high temperature, so as to improve its pre-drying efficiency and drying balance, and improve the high yield rate of subsequent gate-type double-helix silicon carbon rod blanks.

[0025] The first shell 4, the second shell 5 and the third shell 6 are all provided with filter components. The following mainly describes the filter component in the third shell 6. The filter component includes a drawer 11. The drawer 11 is arranged on the rear side of the third shell 6 and extends and slides into the third shell 6. The drawer 11 is located on one side of the third shell 6 in a mouth shape, and the outer surface is in contact with the inner wall of the third shell 6. The drawer 11 is located below the third pipe 9. A screen 12 for filtering hot air is arranged in the drawer 11. The screen 12 is made of high-temperature resistant nylon material. Therefore, when the hot air passes through the first shell 4, the second shell 5 or the third shell 6 and enters the n-type top shell 3, the screen 12 blocks impurities in the hot air, and tries to avoid these impurities from being blown along the hot air to the surface of the silicon carbon rod blank 2, which affects the quality of the silicon carbon rod blank 2 after forming, thereby ensuring the forming effect of the silicon carbon rod blank 2.

[0026] Two mounting plates 19 which are arranged parallel to each other on the left and right are provided in the drawer 11, and a plurality of mounting rods 17 are provided between the two mounting plates 19. A cleaning brush 18 for cleaning the surface of the screen 12 is provided on the lower surface of the mounting rod 17. Therefore, the mounting plate 19 drives the mounting rod 17 to brush back and forth, so that the cleaning brush 18 can clean the dust on the screen 12, thereby avoiding the problem of excessive dust clogging the mesh of the screen 12 as much as possible, and ensuring the air permeability of the screen 12.

[0027] Two connecting grooves 20 are provided on the inner walls on the left and right sides of the drawer 11, a connecting slide rod 21 is provided between the inner walls on the front and rear sides of the connecting slide rod 20, a sliding sleeve 22 is provided on the outer surface of the connecting slide rod 21, one side of the sliding sleeve 22 extends into the drawer 11 and is connected to the mounting plate 19, a tension spring 23 movably sleeved on the outer surface of the connecting slide rod 21 is provided between the sliding sleeve 22 and the inner wall of the connecting groove 20, when the tension spring 23 is not pulled, the tension spring 23 will form a pulling force on the sliding sleeve 22, so that the sliding sleeve 22 is close to the rear side of the connecting slide rod 21.

[0028] A rotating shaft 13 is rotatably connected to the inner wall of the third shell 6, and a rotating plate 15 is sleeved on the outer surface of the rotating shaft 13. A windward plate 14 is arranged on the upper side of the rotating plate 15 and is at the same horizontal position as the third pipe 9. A pushing rod 16 in contact with the mounting rod 17 is arranged on the lower side of the rotating plate 15. When hot air is transported into the third shell 6, the airflow will form a thrust on the windward plate 14, so that the rotating plate 15 rotates clockwise with the rotating shaft 13 as the rotating point. At this time, the lower end of the pushing rod 16 will form a thrust on the mounting rod 17, thereby driving the mounting plate 19 to move forward, and the tension spring 23 is stressed and stretched. The spring 23 has rebound elasticity, so when the tension spring 23 is stretched to the maximum, the push rod 16 cannot push the installation rod 17 to move, so that the windward plate 14 is inclined. When the conveying is stopped, the tension spring 23 loses its restriction and pulls the sliding sleeve 22 to move backward, and the push rod 16 swings to its initial position. At the same time, after the tension spring 23 is restored, it will drive the sliding sleeve 22 to slide back and forth on the connecting sliding rod 21, so that the cleaning brush 18 can clean the dust on the screen 12 back and forth in a short time. The above structure can automatically brush the dust on the screen 12 when the hot air is stopped, and try to avoid the problem of dust adhering to the screen 12 for a long time and causing the mesh of the screen 12 to be blocked.

[0029] The weight of the push rod 16 is greater than the weight of the windward plate 14 , so that the push rod 16 faces downward and is vertical under the action of gravity.

[0030] The working principle of the forming auxiliary device for gate-type double-helix silicon carbon rods provided by the utility model is as follows: when the three exhaust fans 10 extract heat from the industrial tunnel furnace 1 at the same time, due to the inconsistent lengths of the first pipe 7, the second pipe 8 and the third pipe 9, it can be seen that the heat loss generated by the first pipe 7, the second pipe 8 and the third pipe 9 when conveying hot air is not consistent. The heat loss conveyed by the first pipe 7 is the smallest, while the heat loss conveyed by the third pipe 9 is the largest. Therefore, the first shell 4, the second shell 5 and the third shell 6 divide the inside of the n-type top shell 3 from left to right into a high-temperature area, a medium-temperature area and a low-temperature area. In this way, when the silicon carbon rod blank 2 is conveyed from right to left into the industrial tunnel furnace 1, the silicon carbon rod blank 2 passes through the low-temperature area, the medium-temperature area and the high-temperature area in the n-type top shell 3 in turn. In this way, the silicon carbon rod blank 2 is blown by hot air of different temperatures during the conveying process, so that the silicon carbon rod blank 2 can gradually adapt to the temperature change.

Claims

1. A forming auxiliary device for a gate-type double-helix silicon carbon rod, comprising an industrial tunnel furnace (1) and a silicon carbon rod blank (2) placed on a conveyor mesh belt of the industrial tunnel furnace (1), characterized in that: An n-type top shell (3) is arranged on the input port on the right side of the industrial tunnel furnace (1); a first shell (4), a second shell (5) and a third shell (6) are arranged on the upper surface of the n-type top shell (3) in sequence from left to right; three exhaust fans (10) for extracting heat from the inside of the industrial tunnel furnace (1) are arranged on the front of the industrial tunnel furnace (1); a first pipe (7) communicating with the inside of the first shell (4) is arranged on the front of the first shell (4); the other end of the first pipe (7) is connected to the output port of the right exhaust fan (10); a second pipe (8) communicating with the inside of the second shell (5) is arranged on the front of the second shell (5); the other end of the second pipe (8) is connected to the output port of the middle exhaust fan (10); a third pipe (9) communicating with the inside of the third shell (6) is arranged on the front of the third shell (6); the other end of the third pipe (9) is connected to the output port of the left exhaust fan (10); the first shell (4), the second shell (5) and the third shell (6) divide the inside of the n-type top shell (3) from left to right into a high temperature area, a medium temperature area and a low temperature area.

2. A forming auxiliary device for gate-type double-helix silicon carbon rods according to claim 1, characterized in that: The first shell (4), the second shell (5) and the third shell (6) are all provided with a filter assembly, the filter assembly comprising a drawer (11), the drawer (11) being provided at the rear side of the third shell (6) and extending and slidingly penetrating into the interior of the third shell (6), the drawer (11) being provided with a screen (12) for filtering hot air.

3. A forming auxiliary device for gate-type double-helix silicon carbon rods according to claim 2, characterized in that: The drawer (11) is located on one side of the third shell (6) in a square shape, and its outer surface is in contact with the inner wall of the third shell (6). The drawer (11) is located below the third pipe (9).

4. A forming auxiliary device for gate-type double-helix silicon carbon rods according to claim 3, characterized in that: Two mounting plates (19) are arranged in parallel on the left and right sides of the drawer (11), a plurality of mounting rods (17) are arranged between the two mounting plates (19), and a cleaning brush (18) for cleaning the surface of the screen (12) is arranged on the lower surface of the mounting rod (17).

5. The forming auxiliary device for gate-type double-helix silicon carbon rod according to claim 4, characterized in that: Two connecting slide grooves (20) are provided on the inner walls on the left and right sides of the drawer (11); a connecting slide rod (21) is provided between the inner walls on the front and rear sides of the connecting slide groove (20); a sliding sleeve (22) is provided on the outer surface of the connecting slide rod (21); one side of the sliding sleeve (22) extends into the drawer (11) and is connected to the mounting plate (19).

6. The forming auxiliary device for gate-type double-helix silicon carbon rod according to claim 5, characterized in that: A tension spring (23) movably sleeved on the outer surface of the connecting slide rod (21) is provided between the sliding sleeve (22) and the inner wall of the connecting slide groove (20).

7. The forming auxiliary device for gate-type double-helix silicon carbon rod according to claim 6, characterized in that: A rotating shaft (13) is rotatably connected to the inner wall of the third housing (6), a rotating plate (15) is sleeved on the outer surface of the rotating shaft (13), a windward plate (14) which is at the same horizontal position as the third pipe (9) is arranged on the upper side of the rotating plate (15), and a pushing rod (16) which contacts the mounting rod (17) is arranged on the lower side of the rotating plate (15).

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