Multi-section temperature control kiln for intensified firing of domestic ceramic green body

Abstract

The utility model discloses a multi-section temperature control kiln for intensified firing of domestic ceramic green bodies, which comprises a kiln main body and is characterized by further comprising a first conveying roller belt, the first conveying roller belt is arranged on one side of the kiln main body, and a green body frame and a preheating section are arranged at the top of the first conveying roller belt. The preheating section is erected at the top of the first conveying roller belt, and an oxidizing section, a sintering section and a cooling section are sequentially arranged on one side of the preheating section; and the separation sections are all arranged at the joints of the preheating section, the oxidation section, the sintering section and the cooling section, and sealing curtains are evenly distributed in the separation sections. According to the utility model, the kiln main body, the preheating section, the oxidation section, the sintering section, the cooling section, the separation section, the sealing curtain, the air bag, the air guide pipe and the air compressor are arranged, so that the precise isolation of each temperature area of the kiln main body and the automatic response when a green body frame passes through are realized, the stability of a ceramic firing process is guaranteed, and the production efficiency and the product quality are improved.

Description

Technical Field

[0001] This utility model relates to the field of ceramic body firing kiln technology, specifically a multi-stage temperature-controlled kiln for enhanced firing of daily-use ceramic bodies. Background Technology

[0002] The daily-use ceramic body strengthening firing kiln is a special equipment designed for the firing process of ceramic bodies (such as tableware, tea sets, bathroom ceramics, etc.). The firing process of daily-use ceramics is extremely sensitive to temperature control. Traditional kilns often cause problems such as cracking, deformation, and glaze defects in the body due to insufficient temperature control precision. The multi-stage temperature control kiln achieves precise control of the physical and chemical changes of the body by scientifically dividing the firing process into multiple temperature stages.

[0003] Currently, the temperature zones of multi-section kilns are usually separated by metal seals or sealing curtains. Metal seals are prone to contact and friction with the billet, which can cause damage to the edges of the billet. Moreover, mechanical parts are prone to deformation under long-term high temperatures, which can increase the sealing gap. For billets with fluctuating heights (such as mixed disc and cup types), a fixed gap can lead to sealing failure if the gap is too large, or cause the billet to scrape against the curtain if the gap is too small. Therefore, improvements are needed. Utility Model Content

[0004] The purpose of this invention is to provide a multi-stage temperature-controlled kiln for strengthening the firing of daily-use ceramic blanks, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage temperature-controlled kiln for strengthening the firing of daily-use ceramic blanks, comprising: a kiln body, characterized in that it further comprises...

[0006] The first conveyor belt is located on one side of the kiln body, and a billet frame is provided on the top of the first conveyor belt. Temperature sensors are evenly arranged on both sides inside the billet frame.

[0007] The preheating section is mounted on top of the first conveyor belt, and an oxidation section, a sintering section, and a cooling section are sequentially arranged on one side of the preheating section.

[0008] The partitions are all located at the connection points of the preheating section, oxidation section, sintering section and cooling section, and the interior of each partition is uniformly distributed with sealing curtains. Infrared sensors are installed at both ends of one side of each partition.

[0009] The airbags are all embedded inside the sealing curtain. An air compressor is installed at the top of each of the partition sections, and one end of each air compressor is connected to the airbag through an air guide pipe. A solenoid valve is installed on each air guide pipe.

[0010] Preferably, a second conveyor belt, a third conveyor belt, and a fourth conveyor belt are sequentially arranged on one side of the first conveyor belt, and the tops of the second conveyor belt, the third conveyor belt, and the fourth conveyor belt are respectively connected to the oxidation section, the sintering section, and the cooling section.

[0011] Preferably, a drive motor is provided on one side of the first, second, third, and fourth conveyor belts, and the output end of the drive motor is connected to the conveyor rollers in the first, second, third, and fourth conveyor belts through a sprocket and chain assembly.

[0012] Preferably, the inner wall of the preheating section is embedded with resistance wires, and the resistance wires are all made of nickel-chromium alloy.

[0013] Preferably, silicon carbide rods are uniformly embedded in the inner wall of the oxidation section, and exhaust fans are provided at the top of both the oxidation section and the preheating section.

[0014] Preferably, the inner wall of each sintering section is embedded with silicon molybdenum rods, and the top of each sintering section is uniformly provided with exhaust ports.

[0015] Preferably, an air blowing pipe is provided at the top of the cooling section, and air blowing heads are evenly distributed at the bottom of the air blowing pipe. A purification box is provided at the top of the cooling section, and air outlets are evenly opened at the bottom of both sides of the cooling section.

[0016] Preferably, a blower is installed on the cooling section on one side of the purification box, and the input end of the blower is connected to the purification box through an air duct. A filter screen is installed inside the purification box, and the bottom end of the purification box is connected to an air blowing pipe through a connecting pipe.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: This multi-stage temperature-controlled kiln for strengthening the firing of daily-use ceramic blanks is equipped with a kiln body, a preheating section, an oxidation section, a sintering section, a cooling section, a partition section, a sealing curtain, an air bag, a gas guide pipe, an air compressor, a solenoid valve, and an infrared sensor. The partition section is set between each temperature zone, and the air bag is embedded inside the sealing curtain. The air bag is made of high-temperature resistant silicone material. Under normal conditions, the air bag inflates and expands to form a sealing wall. When the blank frame approaches the partition section, the infrared radiation intensity emitted by the blank body itself will gradually increase. After receiving this signal, the infrared sensor generates a charge change, which in turn generates an electrical signal that is transmitted to the control system. Then, the control system controls the solenoid valve to open, and the gas inside the air bag is quickly discharged through the exhaust pipe, causing the sealing curtain to droop rapidly and form a passage for the blank frame to pass through. This achieves precise isolation of each temperature zone of the kiln body and automatic response when the blank frame passes through, which not only ensures the stability of the ceramic firing process but also improves production efficiency and product quality. Attached Figure Description

[0018] Figure 1 This is a front view structural diagram of the present utility model;

[0019] Figure 2 This is a side view sectional structural diagram of the dividing section of this utility model;

[0020] Figure 3 This is a top view schematic diagram of the first and second conveyor belts of this utility model;

[0021] Figure 4 This is a side view cross-sectional structural diagram of the cooling section of this utility model.

[0022] In the diagram: 1. Kiln body; 2. First conveyor roller belt; 3. Second conveyor roller belt; 4. Third conveyor roller belt; 5. Fourth conveyor roller belt; 6. Preheating section; 7. Oxidation section; 8. Sintering section; 9. Cooling section; 10. Drive motor; 11. Resistance wire; 12. Silicon carbide rod; 13. Silicon molybdenum rod; 14. Exhaust fan; 15. Exhaust port; 16. Blower; 17. Purification box; 18. Separation section; 19. Sealing curtain; 20. Airbag; 21. Air compressor; 22. Air guide pipe; 23. Solenoid valve; 24. Infrared sensor; 25. Green body frame; 26. Air outlet; 27. Air blowing pipe; 28. Filter screen; 29. ​​Air blowing head; 30. Temperature sensor. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] Please see Figure 1-4 One embodiment of this utility model provides a multi-stage temperature-controlled kiln for strengthening the firing of daily-use ceramic blanks, comprising: a kiln body 1, and further comprising...

[0025] The first conveyor belt 2 is located on one side of the kiln body 1, and a billet frame 25 is provided on the top of the first conveyor belt 2. Temperature sensors 30 are evenly arranged on both sides inside the billet frame 25.

[0026] The blank holder 25 is placed on the first conveyor roller belt 2, and the ceramic blank body to be fired is placed inside the blank holder 25. Temperature sensors 30 on both sides inside monitor the surface temperature of the blank body in real time, and the data is transmitted to the kiln control system.

[0027] The preheating section 6 is mounted on top of the first conveyor belt 2, and an oxidation section 7, a sintering section 8, and a cooling section 9 are sequentially arranged on one side of the preheating section 6.

[0028] A second conveyor belt 3, a third conveyor belt 4, and a fourth conveyor belt 5 are sequentially arranged on one side of the first conveyor belt 2. The tops of the second conveyor belt 3, the third conveyor belt 4, and the fourth conveyor belt 5 are respectively connected to the oxidation section 7, the sintering section 8, and the cooling section 9.

[0029] A drive motor 10 is respectively installed on one side of the first conveyor belt 2, the second conveyor belt 3, the third conveyor belt 4, and the fourth conveyor belt 5. The output end of the drive motor 10 is connected to the conveyor rollers in the first conveyor belt 2, the second conveyor belt 3, the third conveyor belt 4, and the fourth conveyor belt 5 through sprocket and chain assemblies, so that the speed of each section of the belt can be independently controlled and adjusted to ensure that the residence time of the billet body in each temperature zone meets the process requirements.

[0030] The inner wall of the preheating section 6 is embedded with resistance wires 11, and the resistance wires 11 are all made of nickel-chromium alloy. Both the oxidation section 7 and the top of the preheating section 6 are equipped with exhaust fans 14.

[0031] First, the billet frame 25 enters the preheating section 6, the resistance wire 11 is energized and heated, and the temperature slowly rises to 200-400℃ to remove the physically adsorbed water in the billet body. The exhaust fan 14 at the top of the preheating section 6 is started to discharge the evaporated water vapor out of the kiln to prevent the billet body from cracking due to rapid evaporation of moisture.

[0032] The billet frame 25 is then conveyed to the oxidation section 7. Silicon carbide rods 12 are uniformly embedded in the inner wall of the oxidation section 7. The silicon carbide rods 12 are heated to 300-900℃. The carbonates in the billet body decompose into CaO and CO2, the water of crystallization is released, and the organic matter is burned and decomposed. The exhaust fan 14 maintains the oxygen content in the kiln and ensures that gases such as CO2 are discharged in time to prevent the billet body from bubbling.

[0033] Then the blank holder 25 enters the sintering section 8. The inner wall of the sintering section 8 is embedded with silicon molybdenum rods 13, and the top of the sintering section 8 is uniformly provided with exhaust ports 15.

[0034] The silicon molybdenum rod 13 is heated to 900-1320℃, the quartz crystal form changes, the feldspar melts to form a glass phase, which fills the pores of the main body of the green body, and the top vent 15 discharges volatiles to prevent pinholes in the glaze.

[0035] The top of the cooling section 9 is provided with an air blowing pipe 27, and the bottom of the air blowing pipe 27 is evenly distributed with air blowing heads 29. The top of the cooling section 9 is provided with a purification box 17, and the bottom of both sides of the cooling section 9 are evenly provided with air outlets 26.

[0036] A blower 16 is installed on the cooling section 9 on one side of the purification box 17, and the input end of the blower 16 is connected to the purification box 17 through an air duct. A filter screen 28 is installed inside the purification box 17, and the bottom end of the purification box 17 is connected to the air blowing pipe 27 through a connecting pipe.

[0037] After sintering, the billet frame 25 is moved into the cooling section 9. The blower 16 sends air into the purification box 17. After being filtered by the filter screen 28, the air is blown onto the billet body through the air blowing pipe 27 and the air blowing head 29 to prevent unclean gas from contaminating the billet body. At the same time, the billet body is cooled down. Hot air is discharged from the air outlets 26 on both sides of the cooling section 9 to form an airflow circulation and ensure the uniformity of cooling of the billet body.

[0038] Compared to traditional single-section kilns, each temperature zone heating element, resistance wire 11, silicon carbide rod 12, and silicon molybdenum rod 13, has independent temperature control. Temperature sensor 30 is embedded in the blank frame 25 to provide real-time feedback of temperature data and dynamically adjust the conveying speed and heating power to avoid over-firing or under-firing.

[0039] The partition section 18 is located at the connection of the preheating section 6, the oxidation section 7, the sintering section 8, and the cooling section 9. The partition section 18 is uniformly distributed with sealing curtains 19 inside, and infrared sensors 24 are installed at both ends of one side of the partition section 18.

[0040] Airbag 20, all of which are embedded inside the sealing curtain 19. Air compressor 21 is installed on the top of the partition section 18, and one end of the air compressor 21 is connected to the airbag 20 through the air guide pipe 22. Solenoid valve 23 is installed on the air guide pipe 22.

[0041] Separator 18 is set between each temperature zone. Air compressor 21 inflates airbag 20, and sealing curtain 19 expands to form a sealing wall to isolate adjacent temperature zones.

[0042] Solenoid valve 23 is a two-position five-way pilot-operated solenoid valve that can control the airflow direction. When energized, it opens the exhaust channel and switches to the inflation channel when de-energized.

[0043] When the billet frame 25 approaches the partition section 18, the infrared sensor 24 detects the change in the infrared radiation intensity of the billet body and generates an electrical signal that is transmitted to the control system. Then, the control solenoid valve 23 is opened, the gas in the airbag 20 is quickly discharged, the sealing curtain 19 hangs down to form a channel, and the infrared sensor 24 is fitted with a 2mm thick sapphire lens to resist high temperature.

[0044] After the blank holder 25 passes through, the solenoid valve 23 closes, and the air compressor 21 re-inflates the air bag 20 to restore the sealing wall, ensuring temperature zone isolation. This achieves precise isolation of each temperature zone in the kiln body 1 and automated response when the blank holder 25 passes through, ensuring the stability of the ceramic firing process and improving production efficiency and product quality.

[0045] The specific models and specifications of the drive motor 10, infrared sensor 24, exhaust fan 14, blower 16, air compressor 21, and temperature sensor 30 need to be determined by selection calculation based on the specifications and parameters of the device. The selection calculation method is existing technology, so it will not be described in detail here.

[0046] Working principle: In this embodiment, the blank holder 25 is placed on the first conveyor roller belt 2, and the ceramic blank to be fired is placed inside the blank holder 25. Temperature sensors 30 on both sides inside monitor the surface temperature of the blank in real time, and the data is transmitted to the kiln control system. The drive motor 10 drives the first conveyor roller belt 2, the second conveyor roller belt 3, the third conveyor roller belt 4, and the fourth conveyor roller belt 5 through the sprocket and chain assembly. The speed of each roller belt is independently controlled and adjusted to ensure that the residence time of the blank in each temperature zone meets the process requirements. The resistance wire 11 on the inner wall of the preheating section 6 is energized and heated, and the temperature slowly rises to 200-400℃, removing the physically adsorbed water from the blank. The exhaust fan 14 at the top of the hot section 6 is activated to expel evaporated water vapor from the kiln, preventing the green body from cracking due to rapid moisture evaporation. The green body is then conveyed to the oxidation section 7 via the green body frame 25, where the silicon carbide rods 12 are heated to 300-900℃. Carbonates in the green body decompose into CaO and CO2, crystal water is released, and organic matter is combusted and decomposed. The exhaust fan 14 maintains the oxygen content in the kiln, ensuring timely removal of gases such as CO2 to prevent bubbling in the green body. The green body frame 25 then enters the sintering section 8, where the silicon molybdenum rods 13 are heated to 900-1320℃. Quartz crystals undergo a transformation, and feldspar melts to form a glassy phase, filling the pores of the green body. Volatile substances are discharged through the top exhaust port 15 to prevent glaze pinning. After sintering, the billet frame 25 moves into the cooling section 9. The blower 16 sends air into the purification box 17, which, after being filtered by the filter screen 28, blows air through the air pipe 27 and air nozzle 29 onto the billet body, cooling it down. Hot air is discharged from the air outlets 26 on both sides of the cooling section 9, forming an airflow circulation to ensure uniform cooling of the billet body. Compared to traditional single-section kilns, the heating elements (resistance wire 11, silicon carbide rod 12, silicon molybdenum rod 13) in each temperature zone are independently temperature-controlled. A temperature sensor 30 is embedded in the billet frame 25, providing real-time temperature data feedback and dynamically adjusting the conveyor speed and heating power to avoid over- or under-firing. A separating section 18 is located between each temperature zone, and an air compressor 21 supplies air to the air chamber. Inflating the airbag 20 and expanding the sealing curtain 19 to form a sealing wall, the adjacent temperature zones are isolated. When the blank holder 25 approaches the separating section 18, the infrared sensor 24 detects the change in the infrared radiation intensity of the blank body and generates an electrical signal that is transmitted to the control system. Then, the control solenoid valve 23 is opened, the gas in the airbag 20 is quickly discharged, the sealing curtain 19 hangs down to form a channel, and after the blank holder 25 passes through, the solenoid valve 23 is closed, and the air compressor 21 re-inflates the airbag 20 to restore the sealing wall, ensuring the isolation of temperature zones. This achieves precise isolation of each temperature zone of the kiln body 1 and automatic response when the blank holder 25 passes through, which not only ensures the stability of the ceramic firing process but also improves production efficiency and product quality.

[0047] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0048] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0049] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0050] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-stage temperature-controlled kiln for strengthening and firing daily-use ceramic blanks, comprising: The kiln body (1) is characterized by further comprising: The first conveyor belt (2) is located on one side of the kiln body (1), and a billet frame (25) is provided on the top of the first conveyor belt (2). Temperature sensors (30) are evenly arranged on both sides inside the billet frame (25). The preheating section (6) is mounted on the top of the first conveyor belt (2), and an oxidation section (7), a sintering section (8) and a cooling section (9) are sequentially arranged on one side of the preheating section (6). The partition section (18) is located at the connection of the preheating section (6), the oxidation section (7), the sintering section (8) and the cooling section (9), and the partition section (18) is uniformly distributed with sealing curtains (19) inside. Infrared sensors (24) are provided at both ends of one side of the partition section (18). Airbags (20) are embedded inside the sealing curtain (19). Air compressors (21) are installed on the top of the partition section (18). One end of the air compressors (21) is connected to the airbags (20) through the air pipe (22). Solenoid valves (23) are installed on the air pipes (22).

2. The multi-stage temperature-controlled kiln for strengthening the firing of daily-use ceramic blanks according to claim 1, characterized in that: A second conveyor belt (3), a third conveyor belt (4) and a fourth conveyor belt (5) are sequentially arranged on one side of the first conveyor belt (2). The tops of the second conveyor belt (3), the third conveyor belt (4) and the fourth conveyor belt (5) are respectively connected to the oxidation section (7), the sintering section (8) and the cooling section (9).

3. The multi-stage temperature-controlled kiln for strengthening and firing daily-use ceramic blanks according to claim 2, characterized in that: A drive motor (10) is provided on one side of the first conveyor belt (2), the second conveyor belt (3), the third conveyor belt (4) and the fourth conveyor belt (5), and the output end of the drive motor (10) is connected to the conveyor rollers in the first conveyor belt (2), the second conveyor belt (3), the third conveyor belt (4) and the fourth conveyor belt (5) through a sprocket and chain assembly.

4. The multi-stage temperature-controlled kiln for strengthening and firing daily-use ceramic blanks according to claim 1, characterized in that: The inner wall of the preheating section (6) is embedded with a resistance wire (11), and the resistance wire (11) is made of nickel-chromium alloy.

5. The multi-stage temperature-controlled kiln for strengthening the firing of daily-use ceramic blanks according to claim 1, characterized in that: The inner wall of the oxidation section (7) is uniformly embedded with silicon carbide rods (12), and exhaust fans (14) are provided on the top of both the oxidation section (7) and the preheating section (6).

6. The multi-stage temperature-controlled kiln for strengthening and firing daily-use ceramic blanks according to claim 1, characterized in that: The inner wall of each sintering section (8) is embedded with a silicon molybdenum rod (13), and the top of each sintering section (8) is uniformly provided with an exhaust port (15).

7. The multi-stage temperature-controlled kiln for strengthening and firing daily-use ceramic blanks according to claim 1, characterized in that: The top of the cooling section (9) is provided with an air blowing pipe (27), and the bottom of the air blowing pipe (27) is evenly distributed with air blowing heads (29). The top of the cooling section (9) is provided with a purification box (17), and the bottom of both sides of the cooling section (9) is evenly provided with air outlets (26).

8. The multi-stage temperature-controlled kiln for strengthening the firing of daily-use ceramic blanks according to claim 7, characterized in that: A blower (16) is installed on the cooling section (9) on one side of the purification box (17), and the input end of the blower (16) is connected to the purification box (17) through an air duct. A filter screen (28) is installed inside the purification box (17), and the bottom end of the purification box (17) is connected to the air blowing pipe (27) through a connecting pipe.

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