High-temperature gas rotary sealing device for air supply in rotary kiln

Abstract

The invention discloses a high-temperature gas rotary sealing device for air supply in a rotary kiln, and relates to the technical field of rotary kiln air supply, the high-temperature gas rotary sealing device comprises a sealing device main body and a controller, a support frame is mounted at the bottom of the sealing device main body, an outer ring is mounted above the support frame, an inner ring is mounted in the outer ring, and a rotary sealing structure is arranged between the outer ring and the inner ring; a cooling assembly is installed in the rotary sealing structure, a sealing assembly is arranged at the joint of the outer ring and the inner ring, multiple sets of exhaust pipes are arranged on one face of the inner ring, and multiple sets of dust falling assemblies are installed in the exhaust pipes, so that when the device is used, stable conveying and sealing of high-temperature gas in the rotary kiln can be effectively guaranteed; deformation or damage of the rotary kiln due to high temperature can be avoided, the service life of the rotary kiln is prolonged, dust can be efficiently filtered through the dust falling assembly, dust is prevented from being discharged out of the device, air is prevented from being polluted or output wind power is reduced, and filtered gas is cleaner.

Description

Technical Field

[0001] This invention relates to the field of rotary kiln air supply technology, specifically a high-temperature gas rotary sealing device for air supply inside a rotary kiln. Background Technology

[0002] A rotary kiln is a rotating calcining kiln, belonging to building materials equipment. It mainly includes cement kilns, metallurgical and chemical kilns, and lime kilns. The main working process of a rotary kiln includes gas flow, fuel combustion, heat transfer, and material movement. Through the above processes, the fuel is fully combusted, and the heat of the fuel is effectively transferred to the material. After receiving the heat, the material undergoes a series of physical and chemical changes, finally forming the finished product. Existing rotary kiln high-temperature gas rotary sealing devices have some shortcomings. The sealing effect of some devices will be greatly reduced after long-term use, making it difficult to continuously and effectively prevent high-temperature gas leakage. This not only wastes energy but may also pose a threat to the surrounding environment and the safety of operators. Moreover, some devices lack efficient cooling measures, making them prone to component damage in high-temperature environments, affecting the normal operation and service life of the equipment. Summary of the Invention

[0003] The purpose of this invention is to provide a high-temperature gas rotary sealing device for air supply inside a rotary kiln, so as to solve the problems mentioned in the prior art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a high-temperature gas rotary sealing device for air supply inside a rotary kiln, comprising a sealing device body and a controller, a support frame installed at the bottom of the sealing device body, an outer ring installed above the support frame, an inner ring installed inside the outer ring, a rotary sealing structure provided between the outer ring and the inner ring, a cooling component installed inside the rotary sealing structure, a sealing component provided at the connection between the outer ring and the inner ring, and multiple sets of exhaust pipes provided on one side of the inner ring, with multiple sets of dust suppression components installed inside the exhaust pipes; The cooling component can cool the main body of the sealing device; The sealing assembly can automatically compensate for radial wear of the labyrinth seal, ensuring that it is always in close contact with the inner ring and effectively preventing gas leakage. The dust suppression component can filter dust in the exhaust pipe during exhaust.

[0005] Furthermore, an air inlet pipe is installed on the outer ring, and the air inlet pipe is connected to the rotary sealing structure. Air can be supplied to the rotary sealing structure through the air inlet pipe. Multiple sets of support blocks are installed inside the inner ring, and the support blocks are connected to the kiln body. An air collecting ring is installed at the output end of the exhaust pipe, and the output end of the air collecting ring is connected to the rotary kiln.

[0006] Furthermore, the sealing assembly includes two sets of fixing rings, which are respectively installed on both sides of the inner ring. Multiple sets of oil seal springs and multiple sets of compression springs are respectively installed on the fixing rings. Multiple sets of compression springs are installed on the sides of the fixing rings, and multiple sets of oil seal springs are installed on the top of the fixing rings. The other side of the oil seal springs and compression springs respectively contacts the outer ring. The oil seal spring and compression spring can compensate for radial wear of the labyrinth seal, keeping it in close contact with the inner ring at all times, effectively preventing gas leakage.

[0007] Furthermore, the inner wall of the exhaust pipe is provided with a bidirectional thread, and the dust-suppressing component is provided on the exhaust pipe through the internal bidirectional thread. The dust-suppressing component includes a dust-suppressing ring, the outer side of the dust-suppressing ring is provided with a bidirectional threaded groove, the inner side of the dust-suppressing ring is equipped with a fixing block and multiple sets of dust-suppressing blades, the multiple sets of dust-suppressing blades are equidistantly installed on the dust-suppressing ring, the other end of the dust-suppressing blade is connected to the fixing block, the two ends of the dust-suppressing blade are respectively connected to the dust-suppressing ring and the fixing block through connecting rods, and a cotton sleeve is provided on the dust-suppressing blade.

[0008] Furthermore, when the rotary kiln rotates, it drives the inner ring to rotate, which in turn drives the exhaust pipe to rotate. The dust collection ring inside the exhaust pipe moves back and forth within the exhaust pipe due to inertia, collecting the dust therein.

[0009] Furthermore, the cooling component is located at the bottom of the outer ring and between the support frame. The cooling component includes a cooling water tank and multiple sets of cooling water pipes. The cooling water pipes are respectively installed between the inner ring and the outer ring. The multiple sets of cooling water pipes are respectively connected to the inner wall of the outer ring through connecting rods. The cooling water tank is connected to the cooling water pipes through water pumps. The other end of the cooling water pipes is also connected to the cooling water tank.

[0010] Furthermore, an air supply assembly is installed on the inner ring. The air supply assembly includes multiple sets of air supply blades, which are equidistantly installed on the inner ring. The air supply blades are installed obliquely on the outside of the inner ring, and the air supply blades are made of aluminum alloy.

[0011] Furthermore, a temperature detection component is installed inside the outer ring. The temperature detection component is installed between the cooling water pipe and the outer ring. The temperature detection component includes a detection tube. A memory metal wire and a tension sensor are installed inside the detection block. One end of the memory metal wire is connected to one end of the detection tube, and the other end of the memory metal wire is connected to the tension sensor. The tension sensor is connected to the controller.

[0012] Furthermore, when the temperature inside the rotary sealing structure rises: the memory metal wire slowly returns to its shape, pulling the tension sensor; When the tension sensor detects a specified tension, it will open the valve at the output end of the gas collecting ring to transfer hot gas into the rotary kiln.

[0013] Furthermore, the controller is installed at the front end of the support frame, and is connected to both the sealing device body and the rotary kiln control equipment. The controller is equipped with a control panel.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. Thus, when the device is in use, it can effectively ensure the stable delivery and sealing of high-temperature gas inside the rotary kiln. The presence of the cooling component can prevent the rotary kiln from deforming or being damaged due to high temperature, thus extending its service life. The dust suppression component will efficiently filter these dust particles, preventing dust from being discharged from the device, polluting the air, or reducing the output airflow. The filtered gas is cleaner. 2. External gas enters the rotary sealing structure through the inlet pipe. The gas flows within the rotary sealing structure, which not only provides power for the rotation of the device, but also heats the gas by the heat emitted by the rotary kiln. When the required temperature is reached, the heated gas is discharged through the exhaust pipe on the inner ring and transported to the rotary kiln through the gas collecting ring to provide high-temperature gas to the kiln. During this process, the dust suppression component continues to play a role, constantly filtering the dust in the exhaust pipe to ensure that the gas entering the gas collecting ring and the rotary kiln is clean. 3. The compression spring provides support from the side, further enhancing the sealing effect. When gaps appear in the sealing components due to wear, the elastic deformation of the spring can fill these gaps in time, ensuring the integrity of the seal. At the same time, during the sealing process, the oil seal spring and the compression spring can also play a buffering role. Since the gas flowing in the rotary sealing structure will generate a certain impact force, the spring's buffering can reduce the damage of this impact force to the sealing structure and extend the service life of the sealing components. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial structural diagram of the present invention; Figure 3 This is a schematic diagram of the outer ring structure of the present invention; Figure 4 This is a cross-sectional structural diagram of the present invention; Figure 5 This is a schematic diagram of the gas collecting ring of the present invention; Figure 6 This is a cross-sectional view of the dust suppression component of the present invention; Figure 7 For the present invention Figure 4 An enlarged view of point "A" in the diagram.

[0016] In the diagram: 1. Sealing device body; 11. Support frame; 2. Outer ring; 21. Inlet pipe; 22. Support block; 3. Inner ring; 31. Exhaust pipe; 32. Gas collecting ring; 4. Cooling component; 41. Cooling water tank; 42. Cooling water pipe; 5. Sealing component; 51. Fixing ring; 52. Oil seal spring; 53. Compression spring; 6. Dust suppression component; 61. Dust suppression ring; 62. Dust suppression blade; 7. Air supply component; 71. Air supply blade; 8. Temperature detection component; 81. Detection tube; 82. Memory metal wire; 83. Tension sensor; 9. Controller. Detailed Implementation

[0017] 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.

[0018] Example: Figures 1-7 As shown, the present invention provides a technical solution for a high-temperature gas rotary sealing device for air supply in a rotary kiln, comprising a sealing device body 1 and a controller 9. The device is characterized in that: a support frame 11 is installed at the bottom of the sealing device body 1; an outer ring 2 is installed above the support frame 11; an inner ring 3 is installed inside the outer ring 2; a rotary sealing structure is provided between the outer ring 2 and the inner ring 3; a cooling component 4 is installed inside the rotary sealing structure; a sealing component 5 is provided at the connection between the outer ring 2 and the inner ring 3; and multiple sets of exhaust pipes 31 are provided on one side of the inner ring 3, with multiple sets of dust suppression components 6 installed inside the exhaust pipes 31. Cooling component 4 can cool the main body 1 of the sealing device; The sealing component 5 can automatically compensate for radial wear of the labyrinth seal, ensuring that it is always in close contact with the inner ring 3, effectively preventing gas leakage; The dust suppression component 6 can filter dust in the exhaust pipe 31 during exhaust; Therefore, this device can effectively ensure the stable delivery and sealing of high-temperature gas inside the rotary kiln during use. The presence of the cooling component 4 can prevent the rotary kiln from deforming or being damaged due to high temperature, extending its service life. When the temperature inside the kiln is too high, the cooling component 4 will quickly activate to control the temperature within a safe range, ensuring the normal operation of the entire device. The automatic compensation function of the sealing component 5 is crucial because the sealing structure will inevitably experience radial wear during long-term use. The sealing component 5 can detect the wear in time and automatically adjust to always maintain a tight fit with the inner ring 3. This not only prevents the leakage of high-temperature gas and reduces energy waste, but also avoids the potential hazards to the surrounding environment and operators caused by gas leakage. The dust suppression component 6 further improves the performance of the device. During the exhaust process, dust inside the kiln will enter the exhaust pipe 31 with the gas. The dust suppression component 6 will efficiently filter this dust to prevent dust from being discharged from the device, polluting the air or reducing the output airflow. The filtered gas is cleaner and meets environmental protection requirements. It also reduces the damage of dust to subsequent equipment and lowers the maintenance cost of the equipment.

[0019] As shown in Figure X, in this embodiment, specifically, an air inlet pipe 21 is installed on the outer ring 2, and the air inlet pipe 21 is connected to the rotary sealing structure. Air can be supplied to the rotary sealing structure through the air inlet pipe 21. Multiple sets of support blocks 22 are installed in the inner ring 3, and the support blocks 22 are connected to the kiln body. An air collecting ring 32 is installed at the output end of the exhaust pipe 31, and the output end of the air collecting ring 32 is connected to the rotary kiln. During operation, external gas enters the rotary sealing structure through the inlet pipe 21. The gas circulates within the rotary sealing structure, providing power for the rotation of the device. Furthermore, the gas is heated by the heat radiated from the rotary kiln. Once the required temperature is reached, the heated gas is discharged through the exhaust pipe 31 on the inner ring 3 and transported to the rotary kiln through the gas collecting ring 32, providing high-temperature gas to the kiln. During this process, the dust suppression component 6 continuously filters dust from the exhaust pipe 31, ensuring the cleanliness of the gas entering the gas collecting ring 32 and the rotary kiln. Simultaneously, the cooling component 4 constantly monitors the temperature of the rotary kiln. If the temperature tends to exceed the safe range, the cooling rate is quickly increased to ensure that the rotary kiln always maintains a stable operating temperature. As the device continues to operate, even if the rotary sealing structure experiences minor radial wear, the sealing component 5 can adjust in time to maintain a good seal between the outer ring 2 and the inner ring 3. When the gas flows within the rotary sealing structure, it generates a certain pressure. This pressure helps the gas flow more smoothly within the device, improving the efficiency of gas delivery. Moreover, during the rotation process, the gas can fully contact the rotary sealing structure, better absorb the heat emitted by the rotary kiln, and make the heating effect more uniform.

[0020] As shown in Figure X, in this embodiment, specifically, the sealing assembly 5 includes two sets of fixing rings 51. The fixing rings 51 are respectively installed on both sides of the inner ring 3. Multiple sets of oil seal springs 52 and multiple sets of compression springs 53 are respectively installed on the fixing rings 51. The multiple sets of compression springs 53 are installed on the side of the fixing rings 51, and the multiple sets of oil seal springs 52 are installed on the top of the fixing rings 51. The other side of the oil seal springs 52 and the compression springs 53 respectively contact the outer ring 2. The oil seal spring 52 and compression spring 53 can compensate for radial wear of the labyrinth seal, keeping it in close contact with the inner ring 3 at all times, effectively preventing gas leakage; Therefore, when the device is in use, the sealing component 5 can seal the connection between the outer ring 2 and the inner ring 3 to prevent high-temperature gas from leaking out from the gap between them. As the equipment operates for a long time, the labyrinth seal between the outer ring 2 and the inner ring 3 will gradually experience radial wear. At this time, the oil seal spring 52 and the compression spring 53 will play a role. The oil seal spring 52 will use its own elasticity to apply a certain pressure towards the inner ring 3, so that the sealing structure can keep as close as possible to the inner ring 3. Compression spring 53 provides support from the side, further enhancing the sealing effect. When gaps appear in the sealing assembly 5 due to wear, the elastic deformation of the spring can fill these gaps in time, ensuring the integrity of the seal. At the same time, during the sealing process, oil seal spring 52 and compression spring 53 can also play a buffering role. Since the gas flowing in the rotary sealing structure will generate a certain impact force, the spring buffer can reduce the damage of this impact force to the sealing structure and extend the service life of sealing assembly 5.

[0021] As shown in Figure X, in this embodiment, specifically, the inner wall of the exhaust pipe 31 is provided with a bidirectional thread, and the exhaust pipe 31 is provided with a dust-suppressing component 6 through the internal bidirectional thread. The dust-suppressing component 6 includes a dust-suppressing ring 61, the outer side of the dust-suppressing ring 61 is provided with a bidirectional threaded groove, a fixing block and multiple sets of dust-suppressing blades 62 are installed inside the dust-suppressing ring 61, the multiple sets of dust-suppressing blades 62 are equidistantly installed on the dust-suppressing ring 61, the other end of the dust-suppressing blade 62 is connected to the fixing block, the two ends of the dust-suppressing blade 62 are respectively connected to the dust-suppressing ring 61 and the fixing block through connecting rods, and a cotton sleeve is provided on the dust-suppressing blade 62. When the gas inside the device reaches the required temperature and is sent into the rotary kiln, it will pass through the dust suppression component 6. Due to the cooperation between the bidirectional thread on the inner wall of the exhaust pipe 31 and the bidirectional thread groove on the outer side of the dust suppression ring 61, the gas flow and inertia will cause the dust suppression ring 61 to rotate inside the exhaust pipe 31. During the rotation of the dust suppression ring 61, the dust suppression blades 62 will also rotate and swing. Because of the cotton sleeve on the dust suppression blades 62, when the gas carrying dust passes through the dust suppression component 6, the cotton sleeve can effectively adsorb the dust particles in the gas. Moreover, the multiple sets of equidistantly installed dust suppression blades 62 increase the contact area with the gas, making the dust suppression effect more significant. Furthermore, after long-term use, a large amount of dust will accumulate on the dust suppression component 6, affecting the dust suppression effect. At this time, since the dust suppression component 6 is set in the exhaust pipe 31 by a bidirectional thread, the operator can easily remove the dust suppression component 6 from the exhaust pipe 31 and clean or replace the dust suppression ring 61, dust suppression blades 62 and cotton sleeve. The maintenance work is simple and convenient.

[0022] As shown in Figure X, in this embodiment, specifically, when the rotary kiln rotates, it drives the inner ring 3 to rotate, and at the same time drives the exhaust pipe 31 to rotate. The dust collection ring 61 inside the exhaust pipe 31 moves back and forth in the exhaust pipe 31 under the action of inertia, collecting the dust therein. Therefore, when the device is in use, the gas flow and inertia will cause the dust ring 61 to rotate in the exhaust pipe 31. During the rotation of the dust ring 61, the dust blade 62 will also rotate and swing. Because the cotton sleeve on the dust blade 62 can effectively adsorb dust particles in the gas when the gas with dust passes through the dust component 6.

[0023] As shown in Figure X, in this embodiment, specifically, the cooling component 4 is located at the bottom of the outer ring 2 and between the support frame 11. The cooling component 4 includes a cooling water tank 41 and multiple sets of cooling water pipes 42. The cooling water pipes 42 are respectively installed between the inner ring 3 and the outer ring 2. The multiple sets of cooling water pipes 42 are respectively connected to the inner wall of the outer ring 2 through connecting rods. The cooling water tank 41 is connected to the cooling water pipes 42 through water pumps. The other end of the cooling water pipes 42 is also connected to the cooling water tank 41. The cooling component 4 of the device constantly monitors the temperature of the rotary kiln. Once the temperature tends to exceed the safe range, it quickly increases the cooling intensity to ensure that the rotary kiln always maintains a stable operating temperature. In specific use, the water pump delivers water from the cooling water tank 41 to the cooling water pipe 42. The water circulates within the cooling water pipe 42, carrying away the excess heat emitted by the rotary kiln. Since the cooling water pipe 42 is distributed between the inner ring 3 and the outer ring 2, it can cool the rotary kiln from all directions. When the rotary kiln temperature is too high, the water pump will speed up its operation to circulate more water quickly, enhancing the cooling effect. After absorbing heat, the water flows back to the cooling water tank 41 for heat dissipation treatment in the tank, so that it can be put into circulation again.

[0024] As shown in Figure X, in this embodiment, specifically, an air supply assembly 7 is installed on the inner ring 3. The air supply assembly 7 includes multiple sets of air supply blades 71. The multiple sets of air supply blades 71 are equidistantly installed on the inner ring 3. The air supply blades 71 are installed obliquely on the outside of the inner ring 3. The air supply blades 71 are made of aluminum alloy. When in use, the air supply component 7 of this device can efficiently transport the high-temperature gas heated by the rotating sealing structure to the rotary kiln by means of multiple sets of equidistant and inclined aluminum alloy air supply blades 71. The aluminum alloy material has the advantages of light weight, high strength and good thermal conductivity, which can not only ensure the stability of the air supply blades 71 when rotating at high speed, but also quickly conduct heat and avoid blade deformation or damage due to high temperature. When the inner ring 3 rotates, the air supply blades 71 rotate accordingly, forming a strong wind force, which quickly and evenly blows the high-temperature gas into the interior of the rotary kiln.

[0025] As shown in Figure X, in this embodiment, specifically, a temperature detection component 8 is installed inside the outer ring 2. The temperature detection component 8 is installed between the cooling water pipe 42 and the outer ring 2. The temperature detection component 8 includes a detection tube 81. A memory metal wire 82 and a tension sensor 83 are installed inside the detection block. One end of the memory metal wire 82 is connected to one end of the detection tube 81, and the other end of the memory metal wire 82 is connected to the tension sensor 83. The tension sensor 83 is connected to the controller 9. When in use, the temperature detection component 8 of the device can monitor the temperature changes around the rotary kiln in real time. When the temperature around the rotary kiln changes, the shape memory wire 82 in the detection tube 81 will deform due to the temperature change. Since one end of the shape memory wire 82 is connected to the detection tube 81 and the other end is connected to the tension sensor 83, its deformation will cause the tension sensor 83 to change. The tension sensor 83 converts this tension change into an electrical signal and transmits it to the controller 9. After receiving the signal, the controller 9 will analyze and judge the temperature situation according to the preset program. If the temperature is within the normal range, the controller 9 will maintain the current operating state of the equipment; when the preset value is reached, the output valve of the gas collecting ring 32 will be opened to supply hot air in the device to the rotary kiln.

[0026] As shown in Figure X, in this embodiment, specifically, when the temperature inside the rotary sealing structure rises: the memory metal wire 82 slowly restores its shape, pulling the tension sensor 83; When the tension sensor 83 detects a specified tension, it will open the valve at the output end of the gas collecting ring 32 to transfer hot gas into the rotary kiln. Therefore, when the device is in use, the memory metal wire 82 inside the detection tube 81 will deform due to temperature changes. Since one end of the memory metal wire 82 is connected to the detection tube 81 and the other end is connected to the tension sensor 83, its deformation will cause the tension sensor 83 to change, and different operations will occur depending on the value.

[0027] As shown in Figure X, in this embodiment, specifically, the controller 9 is installed at the front end of the support frame 11. The controller 9 is connected to the sealing device body 1 and the rotary kiln control equipment respectively. The controller 9 is equipped with a control panel. Because the controller 9 is connected to the sealing device body 1, the operator can monitor and control the device through the control panel. It is also connected to the rotary kiln control equipment, so the operator can indirectly control the sealing device body through the rotary kiln control equipment and share data.

[0028] Working Principle: This device effectively ensures the stable delivery and sealing of high-temperature gas inside the rotary kiln. The cooling component 4 prevents deformation or damage to the rotary kiln due to high temperatures, extending its service life. When the kiln temperature is too high, the cooling component 4 quickly activates to control the temperature within a safe range, ensuring the normal operation of the entire device. The automatic compensation function of the sealing component 5 is crucial because radial wear inevitably occurs in the sealing structure during long-term use. The sealing component 5 can promptly detect wear and automatically adjust, always maintaining a tight fit with the inner ring 3. This not only prevents high-temperature gas leakage and reduces energy waste but also avoids potential hazards to the surrounding environment and operators caused by gas leakage. The dust suppression component 6 further enhances the device's performance. During exhaust, dust inside the kiln enters the exhaust pipe 31 with the gas. The dust suppression component 6 efficiently filters this dust, preventing it from being discharged from the device and polluting the air. The filtered gas is cleaner, meeting environmental protection requirements, and also reduces dust damage to subsequent equipment, lowering maintenance costs.

[0029] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-temperature gas rotary sealing device for air supply inside a rotary kiln, comprising a sealing device body (1) and a controller (9), characterized in that: The sealing device body (1) has a support frame (11) installed at the bottom, an outer ring (2) installed above the support frame (11), an inner ring (3) installed inside the outer ring (2), a rotary sealing structure is provided between the outer ring (2) and the inner ring (3), a cooling component (4) is installed inside the rotary sealing structure, a sealing component (5) is provided at the connection between the outer ring (2) and the inner ring (3), and multiple sets of exhaust pipes (31) are provided on one side of the inner ring (3), and multiple sets of dust suppression components (6) are installed inside the exhaust pipes (31). The cooling component (4) can cool the main body (1) of the sealing device; The sealing component (5) can automatically compensate for radial wear of the labyrinth seal, ensuring that it is always in close contact with the inner ring (3), effectively preventing gas leakage; The dust removal component (6) can filter dust in the exhaust pipe (31) during exhaust.

2. The high-temperature gas rotary sealing device for air supply inside a rotary kiln according to claim 1, characterized in that: An air inlet pipe (21) is installed on the outer ring (2). The air inlet pipe (21) is connected to the rotary sealing structure. Air can be supplied to the rotary sealing structure through the air inlet pipe (21). Multiple sets of support blocks (22) are installed in the inner ring (3). The support blocks (22) are connected to the kiln body. A gas collecting ring (32) is installed at the output end of the exhaust pipe (31). The output end of the gas collecting ring (32) is connected to the rotary kiln.

3. The high-temperature gas rotary sealing device for air supply inside a rotary kiln according to claim 2, characterized in that: The sealing assembly (5) includes two sets of fixing rings (51), which are respectively installed on both sides of the inner ring (3). Multiple sets of oil seal springs (52) and multiple sets of compression springs (53) are respectively installed on the fixing rings (51). Multiple sets of compression springs (53) are installed on the side of the fixing rings (51), and multiple sets of oil seal springs (52) are installed on the top of the fixing rings (51). The other side of the oil seal springs (52) and compression springs (53) respectively contact the outer ring (2). The oil seal spring (52) and compression spring (53) can compensate for radial wear of the labyrinth seal so that it is always in close contact with the inner ring (3), effectively preventing gas leakage.

4. The high-temperature gas rotary sealing device for air supply inside a rotary kiln according to claim 3, characterized in that: The exhaust pipe (31) has a bidirectional thread on its inner wall. The exhaust pipe (31) has the dust-reducing component (6) installed through the internal bidirectional thread. The dust-reducing component (6) includes a dust-reducing ring (61). The dust-reducing ring (61) has a bidirectional threaded groove on its outer side. The dust-reducing ring (61) has a fixing block and multiple sets of dust-reducing blades (62) installed inside. The multiple sets of dust-reducing blades (62) are equidistantly installed on the dust-reducing ring (61). The other end of the dust-reducing blade (62) is connected to the fixing block. The two ends of the dust-reducing blade (62) are connected to the dust-reducing ring (61) and the fixing block respectively through connecting rods. The dust-reducing blade (62) is covered with a cotton sleeve.

5. A high-temperature gas rotary sealing device for air supply inside a rotary kiln according to claim 4, characterized in that: When the rotary kiln rotates, it drives the inner ring (3) to rotate, and at the same time drives the exhaust pipe (31) to rotate. The dust collection ring (61) inside the exhaust pipe (31) moves back and forth in the exhaust pipe (31) under the action of inertia, collecting the dust therein.

6. A high-temperature gas rotary sealing device for air supply inside a rotary kiln according to claim 5, characterized in that: The cooling component (4) is located at the bottom of the outer ring (2) and between the support frame (11). The cooling component (4) includes a cooling water tank (41) and multiple sets of cooling water pipes (42). The cooling water pipes (42) are respectively installed between the inner ring (3) and the outer ring (2). The multiple sets of cooling water pipes (42) are respectively connected to the inner wall of the outer ring (2) through connecting rods. The cooling water tank (41) is connected to the cooling water pipes (42) through water pumps. The other end of the cooling water pipes (42) is also connected to the cooling water tank (41).

7. A high-temperature gas rotary sealing device for air supply inside a rotary kiln according to claim 6, characterized in that: An air supply assembly (7) is installed on the inner ring (3). The air supply assembly (7) includes multiple sets of air supply blades (71). The multiple sets of air supply blades (71) are equidistantly installed on the inner ring (3). The air supply blades (71) are installed obliquely outside the inner ring (3). The air supply blades (71) are made of aluminum alloy.

8. A high-temperature gas rotary sealing device for air supply inside a rotary kiln according to claim 7, characterized in that: A temperature detection component (8) is installed inside the outer ring (2). The temperature detection component (8) is installed between the cooling water pipe (42) and the outer ring (2). The temperature detection component (8) includes a detection tube (81). A memory metal wire (82) and a tension sensor (83) are installed inside the detection block. One end of the memory metal wire (82) is connected to one end of the detection tube (81), and the other end of the memory metal wire (82) is connected to the tension sensor (83). The tension sensor (83) is connected to the controller (9).

9. A high-temperature gas rotary sealing device for air supply inside a rotary kiln according to claim 8, characterized in that: When the temperature inside the rotary sealing structure rises: the memory metal wire (82) slowly restores its shape and pulls the tension sensor (83). When the tension sensor (83) detects the specified tension, it will open the valve at the output end of the gas collecting ring (32) to transfer hot gas into the rotary kiln.

10. A high-temperature gas rotary sealing device for air supply inside a rotary kiln according to claim 9, characterized in that: The controller (9) is installed at the front end of the support frame (11). The controller (9) is connected to the sealing device body (1) and the rotary kiln control equipment respectively. The controller (9) is equipped with a control panel.

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