A sealing device for rotary kilns

Abstract

This invention discloses a sealing device for a rotary kiln, comprising a rotary kiln head. A sealing device is provided at one end of the rotary kiln head, including an outer cover and an inner cover. The inner cover and the outer cover are slidable relative to each other. A displacement compensation component is provided between the end of the inner cover away from the rotary kiln head and the inner wall of the outer cover, which can automatically adjust the tightness between the inner cover and the rotary kiln head. An internal thread is provided on the inner wall of the opening of the outer cover. An external thread adapted to the internal thread is provided on the side wall of one end of the rotary kiln head. A collar that does not rotate synchronously with the rotary kiln head is rotatably provided on the side wall of the rotary kiln head. A guide block located radially on the outer wall of the collar is fixed. A through hole is provided on the side of the guide block along the axis of the rotary kiln head. A hydraulic cylinder corresponding to the guide block is fixed on the outer wall of the outer cover. The telescopic rod of the hydraulic cylinder can extend into the through hole. This invention can ensure the sealing performance of the rotary kiln head and improve the working quality of the rotary kiln.

Description

Technical Field

[0001] This invention relates to the field of rotary kiln technology, and more specifically to a sealing device applied to rotary kilns. Background Technology

[0002] A rotary kiln, also known as a rotary calcining kiln, belongs to the building materials equipment category. Rotary kilns can be classified into cement kilns, metallurgical and chemical kilns, and lime kilns based on the materials they process. Cement kilns are mainly used for calcining cement clinker and are divided into two main categories: dry-process cement kilns and wet-process cement kilns. Metallurgical and chemical kilns are mainly used in the metallurgical industry for magnetizing and roasting lean iron ore in steel plants; oxidizing and roasting chromium and nickel iron ore; roasting high-metallurgical-grade ores in refractory material plants; roasting clinker and aluminum hydroxide in aluminum plants; and roasting chromite sand and chromite powder in chemical plants. Lime kilns (i.e., active lime kilns) are used for roasting active lime and lightly calcined dolomite for steel plants and ferroalloy plants.

[0003] A rotary kiln consists of processes involving gas flow, fuel combustion, heat transfer, and material movement. The key to a rotary kiln is ensuring complete fuel combustion and effective heat transfer to the material, leading to a series of physicochemical changes. Currently, during the calcination process in a rotary kiln, the sealing performance of the kiln head cannot be guaranteed to be optimal, reducing the quality of the kiln's operation. Disassembly and cleaning of the sealing mechanism is time-consuming and labor-intensive, affecting its usability. Furthermore, substances remaining in the kiln can negatively impact subsequent use, resulting in poor processing. The sealing mechanism also has poor adjustability, hindering its efficiency. Therefore, we propose a sealing device for rotary kilns. Summary of the Invention

[0004] The purpose of this invention is to provide a sealing device for rotary kilns, which ensures the sealing performance of the kiln head during the calcination of materials, improves the working quality of the rotary kiln, facilitates the installation and disassembly of the sealing device, saves time and effort during the loading and unloading process, avoids affecting the use of the sealing mechanism, improves the processing effect of the rotary kiln, and ensures that the sealing device can automatically adjust the sealing process.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following solution:

[0006] A sealing device for a rotary kiln includes a rotary kiln head. One end of the rotary kiln head is detachably connected to the sealing device, which includes an outer cover and an inner cover. The outer cover has an installation cavity for the inner cover, allowing the inner cover to slide relative to it. A displacement compensation component is provided between the end of the inner cover furthest from the rotary kiln head and the inner wall of the outer cover, automatically adjusting the pressure between the inner cover and the rotary kiln head. An internal thread is provided on the inner wall of the outer cover opening. An external thread adapted to the internal thread is provided on the side wall of one end of the rotary kiln head. A collar that does not rotate synchronously with the rotary kiln head is rotatably mounted on the side wall of the rotary kiln head. A guide block located radially on the outer wall of the collar is fixed. A through hole is provided on the side of the guide block along the axis of the rotary kiln head. A hydraulic cylinder corresponding to the guide block is fixed on the outer wall of the outer cover, and the telescopic rod of the hydraulic cylinder can extend into the through hole.

[0007] By adopting the above technical solution, when sealing the rotary kiln head, the left end opening of the outer cover of the sealing device is aligned with the right end of the rotary kiln head, and the extension rod of the hydraulic cylinder is controlled to extend into the through hole of the guide block. Since the collar does not rotate synchronously with the rotary kiln head, the guide block on the collar limits the outer cover, preventing it from rotating. Thus, when connecting the rotary kiln head and the sealing device, only the rotary kiln head needs to be rotated, causing relative rotation between the rotary kiln head and the outer cover. Under the combined action of the guide block, internal thread, and external thread, the outer cover moves along the axis of the rotary kiln head towards... The directional movement of the guide block, with its through-hole, ensures the outer cover moves in a straight line, preventing offset and reducing the risk of jamming when the rotary kiln head and outer cover are threaded together, thus improving connection efficiency. As the outer cover moves, the left end of the inner cover presses against the opening of the rotary kiln head, sealing the end of the kiln head. Simultaneously, the displacement compensation component at the tail end of the inner cover exerts pressure, firmly pressing it against the kiln head. This ensures the sealing performance of the sealing device during calcination, improving the working quality of the rotary kiln. Furthermore, after prolonged operation, if the inner cover loosens against the kiln head, the displacement compensation component automatically pushes the inner cover back to seal the kiln head opening, achieving a long-term seal. When loading and unloading, the sealing device of the present invention only requires the rotation of the rotary kiln itself and the limiting of the outer cover by the collar to ensure that the extension rod of the hydraulic cylinder is always in the through hole during loading and unloading. Then, the rotation or flipping of the rotary kiln can realize the installation and disassembly of the sealing device. The disassembly process is time-saving and labor-saving, avoids affecting the use of the sealing device, and improves the operating efficiency of the rotary kiln.

[0008] Optionally, the displacement compensation component includes a slider, a limiting block, and a return spring. The slider is symmetrically distributed on the upper and lower sides of the outer cover axis. The slider and the right end of the inner cover are in oblique straight-face contact. The limiting block is located outside the slider and is in oblique straight-face contact with the inner wall of the mounting cavity. The limiting block and the slider are in horizontal straight-face contact. A stepped groove is provided on the inner wall of the outer cover near the right end of the mounting cavity. One end of the return spring acts on the inner wall of the stepped groove, and the other end acts on the left end face of the limiting block. After the inner cover closes the rotary kiln head, the return spring is in a compressed state.

[0009] Optionally, the upper and lower sides of the right end of the inner end cap have first inclined surfaces, and the two first inclined surfaces form a flared structure with the left end larger than the right end, and the left end face of the slider is adapted to the first inclined surface.

[0010] Optionally, the upper and lower sidewalls of the right end of the mounting cavity have a second inclined surface, and the two second inclined surfaces form a flared structure with the left end larger than the right end, and the right end face of the limiting block is adapted to the second inclined surface.

[0011] Optionally, the inner wall of the port connecting the rotary kiln head and the outer cover is a conical surface, and the right end of the inner cover is a conical body adapted to the conical surface.

[0012] Optionally, a rubber block is provided between the rotary kiln head and the inner end face. The left end of the rubber block is bonded to or embedded in the right end face of the rotary kiln head, and the right end of the rubber block is adapted to the inner end face.

[0013] Optionally, a stainless steel sliding plate is provided between the outer wall of the inner end cap and the inner wall of the outer end cap, and the stainless steel sliding plate is welded to the inner wall of the outer end cap.

[0014] Optionally, the collar is located on the left side of the external thread, and a fixing rod is provided at the lower end of the collar, with the lower end of the fixing rod fixedly connected to the bottom surface.

[0015] Optionally, a bearing is fixed to the inner side of the collar, and the inner ring of the bearing is fixedly sleeved on the outer wall of the rotary kiln head, with the inner wall of the collar and the outer ring of the bearing fixedly connected.

[0016] Optionally, the inner end cap has a sealing cavity in the middle, and the inside of the sealing cavity is in a vacuum state.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. In this invention, the sealing device for the rotary kiln head aligns the left end opening of the outer cover of the sealing device with the right end of the rotary kiln head, and controls the extension rod of the hydraulic cylinder to extend into the through hole of the guide block. Since the collar does not rotate synchronously with the rotary kiln head, the guide block on the collar limits the outer cover, preventing it from rotating. Thus, when connecting the rotary kiln head and the sealing device, only the rotary kiln head needs to be rotated, causing relative rotation between the rotary kiln head and the outer cover. Under the combined action of the guide block, internal thread, and external thread, the outer cover moves along the axis of the rotary kiln head towards the guide block. The through hole in the guide block ensures that the outer cover always moves in a straight line, preventing offset and making it less prone to jamming when the rotary kiln head and the outer cover are threaded together, thus improving connection efficiency. As the outer cover moves, the left end of the inner cover presses against the opening of the rotary kiln head, sealing the end of the rotary kiln head and improving the quality of the rotary kiln's operation.

[0019] 2. Simultaneously, the displacement compensation component at the tail end of the inner sealing head exerts a pushing force to the left on the inner sealing head, ensuring it is firmly pressed against the rotary kiln head. This guarantees the sealing performance of the sealing device on the rotary kiln head during calcination, improving the working quality of the rotary kiln. After long-term operation, if loosening occurs between the inner sealing head and the rotary kiln head, the displacement compensation component automatically pushes the inner sealing head back to press and seal the opening of the rotary kiln head, ensuring the sealing performance of the rotary kiln head is maintained for an extended period.

[0020] 3. When loading and unloading the sealing device, the rotary kiln only needs to rotate on its own in conjunction with the limiting position of the outer cover by the collar, and then the rotary kiln can rotate forward or backward to realize the installation and disassembly of the sealing device. The disassembly process is time-saving and labor-saving, avoids affecting the use of the sealing device, and improves the operating efficiency of the rotary kiln.

[0021] 4. After being squeezed between the inner head and the end of the rotary kiln head, the rubber block is compressed, which can effectively seal the gap between the inner head and the end face of the rotary kiln head, further improving the sealing performance of the rotary kiln head. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a side view of the rotary kiln head.

[0024] Figure 3 This is a schematic diagram of the structure of the rotary kiln head;

[0025] Figure 4 This is a schematic diagram of the inner end cap structure.

[0026] Reference numerals: 1-Rotary kiln head, 2-Guide block, 3-Telescopic rod, 4-Hydraulic cylinder, 5-Rubber block, 6-Sealed cavity, 7-Reset spring, 8-Limit block, 9-First inclined surface, 10-Slider, 11-Mounting cavity, 12-Outer cover, 13-Second inclined surface, 14-Stepped groove, 15-Inner end cap, 16-Collar, 17-Fixing rod, 18-Bearing, 19-Conical body, 20-Conical surface, 21-Through hole, 22-Stainless steel sliding plate, 23-External thread, 24-Internal thread. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0028] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "longitudinal," "lateral," "horizontal," "inner," "outer," "front," "rear," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0029] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] Example 1

[0031] A sealing device for a rotary kiln includes a rotary kiln head 1. One end of the rotary kiln head 1 is detachably connected to a sealing device. The sealing device includes an outer cover 12 and an inner cover 15. The outer cover 12 has an installation cavity 11 for installing the inner cover 15. The inner cover 15 and the outer cover 12 can slide relative to each other. A displacement compensation component is provided between the end of the inner cover 15 away from the rotary kiln head 1 and the inner wall of the outer cover 12 to automatically adjust the pressure between the inner cover 15 and the rotary kiln head 1. The outer cover 12... The inner wall of the opening is provided with an internal thread 24, and the side wall of one end of the rotary kiln head 1 is provided with an external thread 23 that is compatible with the internal thread 24. The side wall of the rotary kiln head 1 is provided with a collar 16 that does not rotate synchronously with the rotary kiln head 1. A guide block 2 located in the radial direction of the collar 16 is fixed on the outer wall of the collar 16. The side of the guide block 2 is provided with a through hole 21 along the axis of the rotary kiln head 1. A hydraulic cylinder 4 corresponding to the guide block 2 is fixed on the outer wall of the outer cover 12. The telescopic rod 3 of the hydraulic cylinder 4 can be inserted into the through hole.

[0032] In this embodiment, as Figure 1As shown, when sealing the rotary kiln head 1, the sealing device is hoisted to the rotary kiln head 1 using a gantry crane or other lifting equipment. To facilitate hoisting, lifting lugs can be welded or threaded onto the outer cover 12. With manual assistance, the left end opening of the outer cover 12 of the sealing device is aligned with the right end of the rotary kiln head 1, and the telescopic rod 3 of the hydraulic cylinder 4 is controlled to extend into the through hole 21 of the guide block 2. Because the collar 16 does not rotate synchronously with the rotary kiln head 1, when the rotary kiln head 1 rotates... When the collar 16 is stationary, the guide block 2 on the collar 16 can limit the outer cover 12, preventing it from rotating. As the rotary kiln head 1 rotates, under the combined action of the guide block 2, the internal thread 24, and the external thread 23, the outer cover 12 moves laterally along the axis of the rotary kiln head 1 towards the guide block 2. The guide block 2 is welded to the vertical radial line of the collar 16, and the through hole 21 within the guide block 2 ensures that the outer cover 12 always moves in a straight line. To prevent misalignment and ensure smooth connection between the rotary kiln head 1 and the outer cover 12, the threads of the outer cover 12 and the rotary kiln head 1 are cleaned with high-pressure gas to remove debris and lubricant to improve connection efficiency. As the outer cover 12 moves to the left, the left end of the inner cover 15 contacts the right end of the rotary kiln head 1. At this point, the inner cover 15... 5. The rotary kiln head 1 cannot be completely sealed yet. As the rotary kiln head 1 continues to rotate, since it does not move laterally, the inner sealing head 15 will move to the right under the obstruction of the rotary kiln head 1 until the displacement compensation component completely seals the inner sealing head 15. At this point, the left end of the inner sealing head 15 can press tightly against the opening of the rotary kiln head 1, sealing the rotary kiln head 1. This ensures the sealing performance of the sealing device on the rotary kiln head 1 during calcination, improving the working quality of the rotary kiln. Simultaneously, after long-term operation of the rotary kiln, if the inner sealing head 15 loosens from the rotary kiln head 1, the displacement compensation component can automatically push the inner sealing head 15 to the left, causing the left end of the inner sealing head 15 to press tightly again, sealing the opening of the rotary kiln head 1, achieving a long-term seal for the rotary kiln head 1. When the sealing device of the present invention is loaded and unloaded, it only needs to rely on the rotation of the rotary kiln itself and the limiting of the outer cover 12 by the collar 16 to ensure that the extension rod 3 of the hydraulic cylinder 4 is always in the through hole 21 during loading and unloading. Then, the rotary kiln can be rotated forward or backward to realize the installation and disassembly of the sealing device. The disassembly process is time-saving and labor-saving, avoids affecting the use of the sealing device, and improves the operating efficiency of the rotary kiln.

[0033] Example 2

[0034] Furthermore, the displacement compensation component includes a slider 10, a limiting block 8, and a return spring 7. The slider 10 is symmetrically distributed on the upper and lower sides of the axis of the outer cover 12. The slider 10 and the right end of the inner cover 15 are in oblique straight-face contact. The limiting block 8 is located outside the slider 10 and is in oblique straight-face contact with the inner wall of the mounting cavity 11. The limiting block 8 and the slider 10 are in horizontal straight-face contact. A stepped groove 14 is provided on the inner wall of the outer cover 12 near the right end of the mounting cavity 11. One end of the return spring 7 acts on the inner wall of the stepped groove 14, and the other end acts on the left end face of the limiting block 8. After the inner cover 15 closes the rotary kiln head 1, the return spring 7 is in a compressed state.

[0035] Furthermore, the inner end cap 15 has first inclined surfaces 9 on the upper and lower sides of the right end, and the two first inclined surfaces 9 form a flared structure with the left end larger than the right end. The left end face of the slider 10 is adapted to the first inclined surface 9.

[0036] Furthermore, the upper and lower side walls of the right end of the mounting cavity 11 have second inclined surfaces 13, and the two second inclined surfaces 13 form a flared structure with the left end larger than the right end. The right end face of the limiting block 8 is adapted to the second inclined surface 13.

[0037] The specific working principle of the displacement compensation component in this embodiment is as follows: The displacement compensation component mainly consists of a slider 10, a limiting block 8, and a return spring 7. Two sliders 10 are provided, respectively located on the upper and lower sides of the transverse axis of the outer cover 12. The inner cover 15 is slidably disposed within the mounting cavity 11. The inner cover 15 is cylindrical, and its sidewalls are in contact with the inner wall of the mounting cavity 11. The two sliders 10 are located at the right end of the inner cover 15. The upper and lower sides of the right end of the inner cover 15 are in oblique contact with the two sliders 10. Specifically, the upper and lower sides of the inner cover 15 are provided with first inclined surfaces 9, forming a flared structure with a larger left end and a smaller right end. The left end face of the two sliders 10 is an inclined surface adapted to the first inclined surface 9, thus the two sliders 10 are in mutual contact. When the slider 10 approaches, it generates a leftward lateral force on the inner end cap 15, pushing the inner end cap 15 to move to the left. Simultaneously, the right end of the mounting cavity 11 has symmetrical second inclined surfaces 13 on its upper and lower sides. These two second inclined surfaces 13 also have a flared structure, with the left end larger than the right end. A limiting block 8 is sandwiched between the slider 10 and the second inclined surfaces 13. The limiting block 8 and the second inclined surfaces 13 are in adaptive contact, and the limiting block 8 and the slider 10 are in horizontal, straight-face contact. Thus, when the limiting block 8 moves to the right, it pushes the two sliders 10 closer together, thereby pushing the inner end cap 15 to move to the left and press it against the opening of the rotary kiln head 1. To achieve automatic lateral movement of the limiting block 8, a stepped groove 14 is formed on the inner wall of the outer end cap 12 near the right end of the mounting cavity 11. The return spring 7... One end acts on the inner wall of the stepped groove 14, and the other end acts on the left end face of the limiting block 8. To improve the stability of the return spring 7, annular grooves for placing the return spring 7 can be opened on both the inner wall of the stepped groove 14 and the left end face of the limiting block 8. When sealing the rotary kiln head 1, as the outer cover 12 moves continuously to the left end of the rotary kiln head 1, the inner cover 15 contacts the right end of the rotary kiln head 1. The right end of the inner cover 15 will apply upward and downward forces to the two sliders 10, causing the two sliders 10 to move away from each other and also to squeeze the two limiting blocks 8. This causes the two limiting blocks 8 to squeeze the return spring 7 to the left. The more the outer cover 12 moves to the left, the greater the degree of compression of the return spring 7. When the two limiting blocks 8 can no longer move, the return spring 7 will... When the spring 7 is compressed to its maximum extent, under the pressure of the slider 10 and the limiting block 8, the left end of the inner end cap 15 completely seals the opening of the rotary kiln head 1. When the inner end cap 15 loosens from the rotary kiln head 1, the pressing force of the inner end cap 15 on the slider 10 decreases, thus reducing the pressure on the return spring 7. The return spring 7 immediately releases its stored elastic potential energy, pushing the limiting block 8 to the right. The two limiting blocks 8 move along the second inclined surface 13, pushing the two sliders 10 closer together. Consequently, the two sliders 10 can push the left end face of the inner end cap 15 to press against the opening of the rotary kiln head 1 again, sealing the rotary kiln head 1 once more. This effectively achieves the function of automatic sealing, allowing the device to seal the rotary kiln head 1 for a long time.Improve the sealing performance of the rotary kiln head 1.

[0038] Example 3

[0039] Furthermore, the inner wall of the port where the rotary kiln head 1 connects to the outer cover 12 is a conical surface 20, and the right end of the inner cover 15 is a conical body 19 adapted to the conical surface 20.

[0040] Specifically, such as Figure 3 and Figure 4 As shown, based on Example 1, in order to improve the sealing performance between the opening of the rotary kiln head 1 and the inner sealing head 15, the inner wall of the opening of the rotary kiln head 1 is provided as a conical surface 20, with the left end of the conical surface 20 being smaller than the right end. At the same time, the left end of the inner sealing head 15 is provided as a conical body 19, the structure of which is adapted to the opening of the rotary kiln head 1. In this way, the greater the distance the inner sealing head 15 moves to the left, the better the sealing performance of the inner sealing head 15 to the rotary kiln head 1.

[0041] Example 3

[0042] Furthermore, a rubber block 5 is provided between the surface of the rotary kiln head 1 and the inner end cap 15. The left end of the rubber block 5 is bonded to or embedded in the right end face of the rotary kiln head 1, and the right end of the rubber block 5 is adapted to the surface of the inner end cap 15.

[0043] Specifically, such as Figure 1 As shown, based on Example 2, a small rubber block 5 is provided on the right end face of the rotary kiln head 1. The right end of the rubber block 5 is inclined. When the inner sealing head 15 moves to the left to seal the rotary kiln head 1, the inner sealing head 15 can compress the rubber block 5, so that the rubber block 5 can seal the gap between the inner sealing head 15 and the rotary kiln head 1, improving the sealing performance. At the same time, after the sealing device is installed in place with the rotary kiln head 1, sealant can be applied to the left end of the outer sealing cover 12.

[0044] Example 4

[0045] Furthermore, a stainless steel sliding plate 22 is provided between the outer wall of the inner end cap 15 and the inner wall of the outer end cap 12, and the stainless steel sliding plate 22 is welded to the inner wall of the outer end cap 12. Figure 1 As shown, specifically, in order to improve the flexibility of the inner end cap 15 movement, a stainless steel sliding plate 22 is welded on the inner wall of the outer end cap 12. The stainless steel sliding plate 22 is also embedded in the inner wall of the outer end cap 12, so that the stainless steel sliding plate 22 is flush with the inner wall of the outer end cap 12. The stainless steel sliding plate 22 is located on the right side of the internal thread 24.

[0046] Example 5

[0047] Furthermore, the collar 16 is located to the left of the external thread 23, and a fixing rod 17 is provided at the lower end of the collar 16, with the lower end of the fixing rod 17 fixedly connected to the bottom surface.

[0048] Furthermore, a bearing 18 is fixed inside the collar 16, and the inner ring of the bearing 18 is fixedly sleeved on the outer wall of the rotary kiln head 1. The inner wall of the collar 16 is fixedly connected to the outer ring of the bearing 18.

[0049] Specifically, based on the above embodiments, to prevent relative rotation between the collar 16 and the rotary kiln head 1, a fixing rod 17 is welded to the bottom of the collar 16. The lower end of the fixing rod 17 is vertically fixed to the ground by bolts. Figure 2 As shown, a bearing 18 is fitted onto the outer wall of the rotary kiln head 1. The inner ring of the bearing 18 is fixedly connected to the outer wall of the rotary kiln head 1, and the collar 16 is fixed on the outer ring of the bearing 18. The bearing 18 can prevent the collar 16 from affecting the rotation speed of the rotary kiln head 1.

[0050] Example 6

[0051] Furthermore, the inner sealing head 15 has a sealing cavity 6 in its center, and the interior of the sealing cavity 6 is in a vacuum state. Specifically, as shown... Figure 1 As shown, based on the above embodiment, in order to reduce excessive heat loss from the inner head 15 inside the rotary kiln, a sealed cavity 6 is provided in the middle of the inner head 15. The sealed cavity 6 is evacuated to a vacuum state, which can effectively block heat from being transferred from the left end to the right end of the inner head 15, thereby reducing heat loss inside the rotary kiln.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Based on the technical essence of the present invention, any simple modifications, equivalent substitutions, and improvements made to the above embodiments within the spirit and principles of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A sealing device applied to a rotary kiln, comprising a rotary kiln head (1), characterized in that, One end of the rotary kiln head (1) is detachably connected to a sealing device, which includes an outer cover (12) and an inner cover (15). The outer cover (12) has an installation cavity (11) for installing the inner cover (15). The inner cover (15) and the outer cover (12) can slide relative to each other. The end of the inner cover (15) away from the rotary kiln head (1) is provided with a displacement compensation component between the inner cover (15) and the inner wall of the outer cover (12) to automatically adjust the degree of compression between the inner cover (15) and the rotary kiln head (1). The inner wall of the opening of the outer cover (12) is provided with an internal thread (24). The side wall of one end of the rotary kiln head (1) is provided with an external thread (23) that is compatible with the internal thread (24). The side wall of the rotary kiln head (1) is provided with a collar (16) that does not rotate synchronously with the rotary kiln head (1). A guide block (2) located in the radial direction of the collar (16) is fixed on the outer wall of the collar (16). The side of the guide block (2) is provided with a through hole (21) along the axis of the rotary kiln head (1). A hydraulic cylinder (4) corresponding to the guide block (2) is fixed on the outer wall of the outer cover (12). The telescopic rod (3) of the hydraulic cylinder (4) can be inserted into the through hole (21). The displacement compensation component includes a slider (10), a limiting block (8), and a return spring (7). The slider (10) is symmetrically distributed on the upper and lower sides of the axis of the outer cover (12). The slider (10) and the right end of the inner head (15) are in oblique straight-face contact. The limiting block (8) is located outside the slider (10). The limiting block (8) and the inner wall of the mounting cavity (11) are in oblique straight-face contact. The limiting block (8) and the slider (10) are in horizontal straight-face contact. The inner wall of the outer cover (12) is provided with a stepped groove (14) near the right end of the mounting cavity (11). One end of the return spring (7) acts on the inner wall of the stepped groove (14), and the other end acts on the left end face of the limiting block (8). After the inner head (15) closes the rotary kiln head (1), the return spring (7) is in a compressed state. The inner end cap (15) has a first inclined surface (9) on the upper and lower sides of the right end. The two first inclined surfaces (9) form a flared structure with a large left end and a small right end. The left end face of the slider (10) is adapted to the first inclined surface (9). The upper and lower side walls of the right end of the mounting cavity (11) have a second inclined surface (13). The two second inclined surfaces (13) form a horn-shaped structure with a large left end and a small right end. The right end face of the limiting block (8) is adapted to the second inclined surface (13). The inner wall of the port where the rotary kiln head (1) connects to the outer cover (12) is a conical surface (20), and the left end of the inner cover (15) is a conical body (19) that is adapted to the conical surface (20).

2. A sealing device for a rotary kiln according to claim 1, characterized in that A rubber block (5) is provided between the surface of the rotary kiln head (1) and the inner end cap (15). The left end of the rubber block (5) is bonded to or embedded in the right end face of the rotary kiln head (1), and the right end of the rubber block (5) is adapted to the surface of the inner end cap (15).

3. A sealing device for a rotary kiln according to claim 1, characterized in that A stainless steel sliding plate (22) is provided between the outer wall of the inner cap (15) and the inner wall of the outer cap (12), and the stainless steel sliding plate (22) is welded to the inner wall of the outer cap (12).

4. A sealing device for a rotary kiln according to claim 1, characterized in that The collar (16) is located to the left of the external thread (23), and a fixing rod (17) is provided at the lower end of the collar (16). The lower end of the fixing rod (17) is fixedly connected to the ground.

5. A sealing device for a rotary kiln according to claim 4, characterized in that, The inner side of the collar (16) is fixed with a bearing (18), and the inner ring of the bearing (18) is fixedly sleeved on the outer wall of the rotary kiln head (1). The inner wall of the collar (16) is fixedly connected to the outer ring of the bearing (18).

6. A sealing device for use in a rotary kiln according to claim 1, characterized in that, The inner end cap (15) has a sealing cavity (6) in the middle, and the inside of the sealing cavity (6) is in a vacuum state.

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