Roasting furnace
By employing a dual-stage sealing structure of sealing rings and graphite packing layers in the calcining furnace, along with the micro-positive pressure of the pneumatic module, combined with logic control modules and sensor detection, the leakage problem caused by thermal expansion and contraction and wear of the sealing structure was solved, achieving adaptive adjustment of the seal and anti-clogging effect at high temperatures.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-09
- Publication Date
- 2026-04-03
AI Technical Summary
The existing sealing structure of the roasting furnace fails rapidly at high temperatures due to changes in gaps caused by thermal expansion and contraction and wear, resulting in material leakage and loss of system vacuum.
It adopts a two-stage sealing structure consisting of a sealing ring and a graphite packing layer, combined with a pneumatic module to provide micro-positive pressure and adaptive adjustment, and uses a logic control module and sensors to detect blockages, and prevents blockages by airflow backflushing.
It achieves adaptive adjustment of the sealing effect in high-temperature environments, preventing material leakage and the ingress of external air, and ensuring system vacuum and conveying efficiency.
Smart Images
Figure CN121782860A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of roasting furnace technology, specifically to a roasting furnace. Background Technology
[0002] A roasting furnace is an industrial furnace used to heat-treat ores, concentrates, or other materials at temperatures below their melting points. Its core process involves heating the material in air, inert gas, reducing gas, or a specific atmosphere to induce physical and chemical changes, but without melting.
[0003] In existing technologies, if ordinary rubber (such as nitrile rubber) seals or fillers are used, high temperatures will cause them to age rapidly, harden, crack, and lose elasticity, thus completely losing their sealing effect. Under high-temperature conditions, simple O-rings or lip seals may still be used. These structures cannot compensate for the gap changes caused by thermal expansion and contraction and wear. High temperatures are conducted to the sealing parts through the shaft. Without an effective cooling structure, such as a cooling jacket, heat sink, or high-temperature resistant lubricant, the seals will fail rapidly in harsh environments, and material dust will leak from the shaft end, polluting the environment and causing waste. For unloading valves operating under negative pressure, seal failure will cause external air to be drawn in, damaging the system vacuum and affecting conveying efficiency. Therefore, a roasting furnace with an adaptively adjustable sealing structure to cope with wear and thermal expansion needs to be designed to overcome the above problems. Summary of the Invention
[0004] The purpose of this invention is to provide a roasting furnace to solve the problem mentioned in the background art that the existing sealing structure cannot compensate for the gap changes caused by thermal expansion and contraction and wear, and fails rapidly in harsh environments.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a roasting furnace, comprising a roasting furnace body, a bottom fixing frame fixedly installed at the lower end of the roasting furnace body, and a feeding hopper fixedly installed at the discharge port at the lower end of the roasting furnace body; further comprising a star-shaped discharge valve and a sealing component; the star-shaped discharge valve is fixedly installed at the lower end of the feeding hopper; the sealing component is installed at the position where the main shaft of the star-shaped discharge valve passes through the end cover; the sealing component consists of a shell, a sealing ring, and a graphite packing layer; a feeding pipe is fixedly installed at the discharge end of the star-shaped discharge valve; an anti-blocking component is installed on the feeding pipe; and a logic control module is fixedly installed on one side of the feeding pipe; the logic control module consists of logic... The system consists of a logic controller, vibration sensor, and temperature sensor. The logic control module is used to determine whether the rotary valve is blocked and whether its operating temperature is rising. A pneumatic module is fixedly installed on one side of the bottom mounting bracket. The pneumatic module consists of a compressed air power source and connecting parts. The pneumatic module serves as the power source for driving the anti-blocking components and maintaining a slight positive pressure on the sealing components. A mounting bracket is fixedly installed on one side of the end cap of the rotary valve. A torque limiter is fixedly installed on one side of the mounting bracket. The torque limiter is used to detect the torque of the rotary valve. The main body of the roasting furnace is equipped with multiple stacking baffles. Multi-stage filters are fixedly installed at the lower end of the stacking baffles.
[0006] Based on the preferred embodiment of this technical solution, the sealing ring has an annular cavity for storing compressed gas. A pneumatic connector is fixedly installed on the outer shell of the sealing component. The pneumatic connector is connected to the output end of the pneumatic module through a hose and a control valve. One end of the pneumatic connector is fixedly connected to a connecting pipe, which is connected to the inflation end of the sealing ring.
[0007] In this preferred embodiment of the technical solution, the graphite packing layer is located on the side near the end cover of the star-shaped discharge valve. The graphite packing layer is used for heat insulation and auxiliary sealing, while the sealing ring is used for primary sealing. The sealing ring and the graphite packing layer together form a two-stage sealing structure.
[0008] Based on the preferred embodiment of this technical solution, one end of the pneumatic connector is fixedly connected to a connecting pipe two, and an air pressure zone is provided between the outer shell of the sealing component and the sealing ring. The connecting pipe two is used to inflate the air pressure zone to form a slight positive pressure.
[0009] In a preferred embodiment of this technical solution, a memory limiting ring is provided at the inner ring of the sealing ring. When the memory limiting ring is heated, the diameter of the memory limiting ring decreases.
[0010] In a preferred embodiment of this technical solution, an oil filling port is fixedly connected to one side of the outer shell of the sealing component. The oil filling port is used to add oil to form an outer ring oil seal of the sealing ring.
[0011] Based on the preferred embodiment of this technical solution, the anti-blocking component includes a self-rotating plate and a solenoid valve. A side housing is fixedly connected to one side of the feeding pipe, and the solenoid valve is fixedly installed on one side of the side housing. A vent is provided on one side of the feeding pipe, and the self-rotating plate is rotatably connected to the vent. The solenoid valve is connected to the output end of the pneumatic module.
[0012] Based on the preferred embodiment of this technical solution, the solenoid valve is controlled to open and close by a logic control module. A discharge port is provided at the lower end of the side box, and a second rotating plate is rotatably connected to the discharge port. A guide hopper is fixedly installed at the lower end of the discharge port. When the solenoid valve is opened, the first rotating plate rotates to seal the discharge pipe, and the second rotating plate seals the discharge port. When the solenoid valve is closed, both the first rotating plate and the second rotating plate reset themselves, and the discharge port opens.
[0013] Based on the preferred embodiment of this technical solution, an impeller is rotatably connected inside the star-shaped discharge valve. The impeller is used for discharging material. Multiple slots are distributed in a linear array on both sides of the impeller. Multiple cutting blades are provided in the discharge bin of the star-shaped discharge valve. When the impeller rotates, the cutting blades will pass through the slots. The cutting blades are used to assist in cutting and crushing the material.
[0014] In a preferred embodiment of this technical solution, the impeller shaft end is provided with a reverse spiral groove. When the impeller rotates, the reverse spiral groove is used to propel the dust back.
[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. The sealing component adopts a two-stage sealing structure consisting of a sealing ring and a graphite packing layer. When exposed to high temperatures, the graphite packing layer still has a good sealing effect due to its own heat resistance. The sealing ring is used to further ensure the sealing performance, and its sealing effect is better than that of the graphite packing layer. The graphite packing layer has a certain heat insulation effect to prevent the sealing ring from overheating and causing deformation and damage. In this way, the sealing component has both good heat resistance and sealing performance.
[0016] 2. The sealing ring has an annular cavity. The pneumatic module provides compressed gas to the sealing ring and stores it in the annular cavity, which allows the inner ring of the sealing ring to fit more tightly. This not only enhances the sealing effect of the sealing ring, but also allows the compressed gas to deform and refit the sealing ring when it wears, giving it a certain degree of self-adjustment capability.
[0017] 3. An air pressure zone is provided between the outer shell of the sealing component and the sealing ring. Connecting pipe 2 is used to inflate the air pressure zone to form a slight positive pressure. In this way, even if the sealing component leaks, it will return to the star-shaped unloading valve due to the slight positive pressure, effectively preventing the leakage of internal dust. At the same time, a small amount of positive air pressure ensures that external air cannot enter.
[0018] 4. When a blockage occurs during the material conveying process of the rotary valve, the vibration frequency, temperature, and torque are used to determine whether the discharge hopper of the rotary valve is blocked, avoiding misjudgment. Subsequently, the logic control module controls the rotary valve to reverse and simultaneously controls the solenoid valve to open. As the rotating plate rotates, it seals the passage of the discharge pipe and changes the flow direction of the compressed gas, causing it to blow upward, thereby achieving a backflushing effect and realizing anti-blocking. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of one embodiment of the roasting furnace of the present invention; Figure 2 This is a schematic diagram of the distribution structure of the roasting furnace body and the star-shaped unloading valve of the present invention; Figure 3 This is a schematic diagram of the distribution structure of the material stacking partition and multi-stage filter screen of the present invention; Figure 4 This is a schematic diagram of the distribution structure of the star-shaped unloading valve and sealing components of the present invention; Figure 5 This is a schematic diagram of the distribution structure of the side box and the material guide bin of the present invention; Figure 6 This is a cross-sectional view of the distribution structure of the first and second rotating plates of the present invention; Figure 7 This is a schematic diagram of the impeller and blade distribution structure of the present invention; Figure 8 This is a schematic diagram of the sealing component structure of the present invention; Figure 9 This is a schematic diagram of the internal cross-sectional structure of the sealing component of the present invention; Figure 10 This is a schematic diagram of the distribution structure of the sealing ring and the graphite disk root layer of the present invention; Figure 11 A schematic diagram of the reverse helical groove structure of the impeller of the present invention.
[0020] In the diagram: 1. Main body of the roasting furnace; 2. Bottom fixing frame; 3. Feeding hopper; 4. Rotary discharge valve; 5. Stacking partition; 6. Multi-stage filter screen; 7. Mounting frame; 8. Torque limiter; 9. Sealing component; 10. Feeding pipe; 11. Solenoid valve; 12. Logic control module; 13. Side box; 14. Rotating plate one; 15. Rotating plate two; 16. Guide hopper; 17. Impeller; 18. Cutting blade; 19. Pneumatic connector; 20. Sealing ring; 21. Oil replenishment port; 22. Connecting pipe one; 23. Connecting pipe two; 24. Memory limit ring; 25. Graphite packing layer; 26. Pneumatic module. Detailed Implementation
[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0022] Please see Figure 1-11 This invention provides an embodiment of a roasting furnace, comprising a roasting furnace body 1, a bottom fixing frame 2 fixedly installed at the lower end of the roasting furnace body 1, and a feeding hopper 3 fixedly installed at the discharge port at the lower end of the roasting furnace body 1. It also includes a rotary valve 4 and a sealing component 9. The rotary valve 4 is fixedly installed at the lower end of the feeding hopper 3. The sealing component 9 is installed at the position where the main shaft of the rotary valve 4 passes through the end cover. The sealing component 9 consists of a shell, a sealing ring 20, and a graphite packing layer 25. A feeding pipe 10 is fixedly installed at the discharge end of the rotary valve 4. An anti-blocking component is installed on the feeding pipe 10. A logic control module 12 is fixedly installed on one side of the feeding pipe 10. The logic control module 12 consists of a logic controller, a vibration sensor, and a temperature sensor. The logic control module 12 is used to determine whether the rotary valve 4 is blocked and whether its operating temperature has risen. A pneumatic module 26 is fixedly installed on one side of the bottom fixing frame 2. The pneumatic module 26 is powered by a compressed air source. The system comprises connecting parts and a pneumatic module 26, which serves as the power source for driving the anti-blocking component and maintaining the slight positive pressure of the sealing component 9. A mounting bracket 7 is fixedly installed on one side of the end cap of the star-shaped discharge valve 4, and a torque limiter 8 is fixedly installed on one side of the mounting bracket 7. The torque limiter 8 is used to detect the torque of the star-shaped discharge valve 4. The main body 1 of the roasting furnace is equipped with multiple stacking baffles 5. A multi-stage filter screen 6 is fixedly installed at the lower end of the stacking baffles 5. The stacking baffles 5 are used to separate materials, and the multi-stage filter screen 6 is used to filter large impurities. The sealing component 9 adopts a double-stage sealing structure composed of a sealing ring 20 and a graphite packing layer 25, and has an adaptive adjustment capability. It still has good sealing performance when wear and thermal expansion occur. When the star-shaped discharge valve 4 is conveying materials and a blockage occurs, the vibration frequency, temperature and torque are used to determine whether the discharge bin of the star-shaped discharge valve 4 is blocked, avoiding misjudgment. The anti-blockage is achieved by using the backflow of air.
[0023] Please see Figure 9A further solution based on this embodiment is as follows: the sealing ring 20 has an annular cavity for storing compressed gas. A pneumatic connector 19 is fixedly installed on the outer shell of the sealing component 9. The pneumatic connector 19 is connected to the output end of the pneumatic module 26 through a hose and a control valve. One end of the pneumatic connector 19 is fixedly connected to a connecting pipe 22, which is connected to the inflation end of the sealing ring 20. The pneumatic module 26 provides compressed gas to the sealing ring 20 and stores it in the annular cavity, so that the inner ring of the sealing ring 20 can fit more tightly. This not only enhances the sealing effect of the sealing ring 20, but also allows the compressed gas to deform and re-fit the sealing ring 20 when it wears, thus having a certain adaptive adjustment capability.
[0024] Please see Figure 9 and Figure 10 A further solution based on this embodiment is as follows: the graphite packing layer 25 is located on the side near the end cap of the star-shaped unloading valve 4. The graphite packing layer 25 is used for heat insulation and auxiliary sealing, and the sealing ring 20 is used for main sealing. The sealing ring 20 and the graphite packing layer 25 together form a double-stage sealing structure. The sealing component 9 adopts a double-stage sealing structure composed of the sealing ring 20 and the graphite packing layer 25. When encountering high temperature, the graphite packing layer 25 still has a good sealing effect due to its own heat resistance. The sealing ring 20 is used to further ensure the sealing performance, and its sealing effect is better than that of the graphite packing layer 25. The graphite packing layer 25 has a certain heat insulation effect to prevent the sealing ring 20 from overheating and causing it to deform and be damaged. In this way, the sealing component 9 has both good heat resistance and sealing performance.
[0025] Please see Figure 9 A further solution based on this embodiment is as follows: one end of the pneumatic connector 19 is fixedly connected to a connecting pipe 23. A pressure zone is provided between the outer shell of the sealing member 9 and the sealing ring 20. The connecting pipe 23 is used to inflate the pressure zone to form a slight positive pressure. In this way, even if the sealing member 9 leaks, it will return to the star-shaped unloading valve 4 due to the slight positive pressure, effectively preventing the overflow of internal dust. At the same time, the small amount of positive air pressure ensures that external air cannot enter.
[0026] Please see Figure 9 A further solution based on this embodiment is as follows: a memory limiting ring 24 is provided at the inner ring of the sealing ring 20. When the memory limiting ring 24 is heated, the diameter of the memory limiting ring 24 shrinks. After long-term operation, the heat accumulated inside the sealing ring 20 gradually increases, and the sealing ring 20 will gradually soften, thus affecting its sealing effect. The memory limiting ring 24 is made of memory alloy material. When heated, the diameter of the memory limiting ring 24 shrinks, providing an external pressure for the sealing ring 20, thereby compensating for the sealing performance.
[0027] Please see Figure 9 and Figure 10 A further solution based on this embodiment is as follows: an oil filling port 21 is fixedly connected to one side of the outer shell of the sealing component 9. The oil filling port 21 is used to add oil to form an outer ring oil seal of the sealing ring 20. The oil filling port 21 is used to add a small amount of oil into the outer shell of the sealing component 9 so that the outer gap of the sealing ring 20 is filled. The oil seal is used to further enhance the sealing performance. After a period of use, the oil will be lost, so it is necessary to replenish the oil regularly through the oil filling port 21.
[0028] Please see Figure 5 and Figure 6 A further solution based on this embodiment is as follows: the anti-blocking component includes a rotating plate 14 and a solenoid valve 11. A side box 13 is fixedly connected to one side of the feed pipe 10. The solenoid valve 11 is fixedly installed on one side of the side box 13. A vent is provided on one side of the feed pipe 10. The rotating plate 14 is rotatably connected to the vent. The solenoid valve 11 is connected to the output end of the pneumatic module 26. When the solenoid valve 11 is opened, the compressed gas of the pneumatic module 26 will be injected into the side box 13. After the compressed gas is injected, it will first push the rotating plate 14 to rotate, thereby sealing the channel of the feed pipe 10 and changing the flow direction of the compressed gas, making it blow upward, thereby playing a backflushing role, thus achieving anti-blocking.
[0029] Please see Figure 6 A further solution based on this embodiment is as follows: the solenoid valve 11 is controlled to open and close by the logic control module 12. A discharge port is provided at the lower end of the side housing 13, and a second rotating plate 15 is rotatably connected to the discharge port. A guide hopper 16 is fixedly installed at the lower end of the discharge port. When the solenoid valve 11 is open, the first rotating plate 14 rotates to seal the discharge pipe 10, and the second rotating plate 15 seals the discharge port. When the solenoid valve 11 is closed, both the first rotating plate 14 and the second rotating plate 15 automatically reset, opening the discharge port. After the anti-blocking is completed, a small amount of material will enter the side housing 13 during the reset process of the first rotating plate 14. At this time, the material will enter the guide hopper 16 through the discharge port and be returned to the discharge pipe 10 through the guide hopper 16, preventing a decrease in material utilization.
[0030] Please see Figure 11 A further solution based on this embodiment is as follows: An impeller 17 is rotatably connected inside the star-shaped discharge valve 4. The impeller 17 is used for discharging material. Multiple slots are distributed in a linear array on both sides of the impeller 17. Multiple cutting blades 18 are provided in the discharge bin of the star-shaped discharge valve 4. When the impeller 17 rotates, the cutting blades 18 will pass through the slots. The cutting blades 18 are used to assist in cutting the material. When blockage occurs, the cutting blades 18 can assist in cutting the material, which greatly reduces the probability of blockage.
[0031] Please see Figure 11A further solution based on this embodiment is: the end of the impeller 17 shaft is provided with a reverse spiral groove. When the impeller 17 rotates, the reverse spiral groove is used to push back the dust. Even if a small amount of dust is close to the sealing area, when the main shaft rotates, the reverse spiral groove will generate a "pumping effect" to push the dust that is trying to leak back into the valve body.
[0032] Working principle: The sealing component 9 adopts a two-stage sealing structure consisting of a sealing ring 20 and a graphite packing layer 25. When exposed to high temperatures, the graphite packing layer 25 still has a good sealing effect due to its own heat resistance. The sealing ring 20 is used to further ensure the sealing performance, and its sealing effect is better than that of the graphite packing layer 25. The graphite packing layer 25 has a certain heat insulation effect to prevent the sealing ring 20 from overheating and causing it to deform and be damaged. In this way, the sealing component 9 has both good heat resistance and sealing performance.
[0033] The sealing ring 20 has an annular cavity. The pneumatic module 26 provides compressed gas to the sealing ring 20 and stores it in the annular cavity, so that the inner ring of the sealing ring 20 can fit more tightly. This not only enhances the sealing effect of the sealing ring 20, but also allows the compressed gas to deform and refit the sealing ring 20 when it wears, thus having a certain self-adjusting capability.
[0034] A pressure zone is provided between the outer shell of the sealing component 9 and the sealing ring 20. The connecting pipe 23 is used to fill the pressure zone with air to form a slight positive pressure. In this way, even if the sealing component 9 leaks, it will return to the star-shaped unloading valve 4 due to the slight positive pressure, effectively preventing the leakage of internal dust. At the same time, a small amount of positive air pressure ensures that external air cannot enter.
[0035] After prolonged operation, the heat accumulated inside the sealing ring 20 gradually increases, causing the sealing ring 20 to soften and its sealing effect to be affected. The memory limiting ring 24 is made of memory alloy material. When heated, the diameter of the memory limiting ring 24 will shrink, providing an external pressure to the sealing ring 20, thereby compensating for the sealing performance.
[0036] The oil filler port 21 is used to add a small amount of oil into the housing of the sealing component 9, so that the outer gap of the sealing ring 20 is filled and the sealing performance is further enhanced by the oil seal. After a period of use, the oil will be depleted, so it is necessary to replenish the oil regularly through the oil filler port 21.
[0037] When a blockage occurs during the material conveying process of the star-shaped discharge valve 4, the collision between the material and the impeller 17 due to the obstruction will increase the vibration amplitude and frequency of the discharge pipe 10. The operating temperature of the discharge hopper of the star-shaped discharge valve 4 will increase, and the torque will increase. The vibration sensor, temperature sensor, and torque limiter 8 in the logic control module 12 will transfer these signals to the chip for analysis to avoid misjudgment. Subsequently, the logic control module 12 controls the star-shaped discharge valve 4 to reverse and simultaneously controls the solenoid valve 11 to open. The compressed gas from the pneumatic module 26 will then be injected into the side box 13. After injection, the compressed gas will first push the rotating plate 14 to rotate, thereby sealing the passage of the discharge pipe 10 and changing the flow direction of the compressed gas, causing it to blow upward, thus achieving a backflushing effect and achieving anti-blocking.
[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A roasting furnace, comprising a roasting furnace body (1), a bottom fixing frame (2) fixedly installed at the lower end of the roasting furnace body (1), and a feeding hopper (3) fixedly installed at the discharge port at the lower end of the roasting furnace body (1), characterized in that: It also includes a rotary valve (4) and a sealing component (9). The rotary valve (4) is fixedly installed at the lower end of the discharge hopper (3). The sealing component (9) is installed at the position where the main shaft of the rotary valve (4) passes through the end cover. The sealing component (9) consists of a shell, a sealing ring (20) and a graphite packing layer (25). A discharge pipe (10) is fixedly installed at the discharge end of the rotary valve (4). An anti-blocking component is installed on the discharge pipe (10). A logic control module (12) is fixedly installed on one side of the discharge pipe (10). The logic control module (12) consists of a logic controller, a vibration sensor and a temperature sensor. The logic control module (12) is used to determine the rotary valve. (4) Whether it is blocked and whether its working temperature rises, a pneumatic module (26) is fixedly installed on one side of the bottom fixed frame (2). The pneumatic module (26) consists of a compressed air power source and connecting parts. The pneumatic module (26) serves as the power source for driving the anti-blocking component and maintaining the slight positive pressure of the sealing component (9). A mounting bracket (7) is fixedly installed on one side of the end cap of the star discharge valve (4). A torque limiter (8) is fixedly installed on one side of the mounting bracket (7). The torque limiter (8) is used to detect the torque of the star discharge valve (4). Multiple stacking baffles (5) are provided inside the roasting furnace body (1). A multi-stage filter screen (6) is fixedly installed at the lower end of the stacking baffle (5).
2. The roasting furnace according to claim 1, characterized in that: The sealing ring (20) has an annular cavity for storing compressed gas. A pneumatic connector (19) is fixedly installed on the outer shell of the sealing component (9). The pneumatic connector (19) is connected to the output end of the pneumatic module (26) through a hose and a control valve. One end of the pneumatic connector (19) is fixedly connected to a connecting pipe (22), which is connected to the inflation end of the sealing ring (20).
3. The roasting furnace according to claim 2, characterized in that: The graphite packing layer (25) is located on one side near the end cap of the star-shaped discharge valve (4). The graphite packing layer (25) is used for heat insulation and auxiliary sealing, and the sealing ring (20) is used for main sealing. The sealing ring (20) and the graphite packing layer (25) together form a double-stage sealing structure.
4. The roasting furnace according to claim 3, characterized in that: One end of the pneumatic connector (19) is fixedly connected to a connecting pipe (23). A pressure zone is provided between the outer shell of the sealing component (9) and the sealing ring (20). The connecting pipe (23) is used to fill the pressure zone with air to form a slight positive pressure.
5. The roasting furnace according to claim 4, characterized in that: The inner ring of the sealing ring (20) is provided with a memory limiting ring (24). When the memory limiting ring (24) is heated, the diameter of the memory limiting ring (24) shrinks.
6. The roasting furnace according to claim 5, characterized in that: An oil filler port (21) is fixedly connected to one side of the outer shell of the sealing component (9). The oil filler port (21) is used to add oil to form the outer ring oil seal of the sealing ring (20).
7. The roasting furnace according to claim 6, characterized in that: The anti-blocking component includes a self-rotating plate (14) and a solenoid valve (11). A side box (13) is fixedly connected to one side of the feed pipe (10). The solenoid valve (11) is fixedly installed on one side of the side box (13). A vent is provided on one side of the feed pipe (10). The self-rotating plate (14) is rotatably connected to the vent. The solenoid valve (11) is connected to the output end of the pneumatic module (26).
8. The roasting furnace according to claim 7, characterized in that: The solenoid valve (11) is controlled to open and close by the logic control module (12). The lower end of the side box (13) is provided with a discharge port. A rotating plate (15) is rotatably connected to the discharge port. A guide hopper (16) is fixedly installed at the lower end of the discharge port. When the solenoid valve (11) is opened, the rotating plate (14) rotates to seal the discharge pipe (10), and the rotating plate (15) seals the discharge port. When the solenoid valve (11) is closed, the rotating plate (14) and the rotating plate (15) reset themselves, and the discharge port opens.
9. The roasting furnace according to claim 8, characterized in that: An impeller (17) is rotatably connected inside the star-shaped discharge valve (4). The impeller (17) is used for discharging material. Multiple slots are distributed in a straight array on both sides of the impeller (17). Multiple cutting blades (18) are provided in the discharge bin of the star-shaped discharge valve (4). When the impeller (17) rotates, the cutting blades (18) will pass through the slots. The cutting blades (18) are used to assist in cutting the material.
10. The roasting furnace according to claim 6, characterized in that: The impeller (17) has a reverse spiral groove at the end of its shaft. When the impeller (17) rotates, the reverse spiral groove is used to propel the dust back.