A rotary kiln head sealing structure for cement production

Abstract

This application discloses a rotary kiln head sealing structure for cement production, belonging to the field of cement production technology. It addresses the problem of cumbersome and slow maintenance procedures when reinstalling the sealing structure after repairs. The structure mainly includes a kiln head hood, with a cylindrical body on one side and an inlet on the same side that mates with the cylindrical body. A connecting pipe is fixed to one side of the kiln head hood, outside the inlet, and a connecting groove with a funnel-shaped cross-section is formed on the inner side of the connecting pipe. This application only requires pushing the kiln head hood back to its original position. One end of an inner fixing plate gradually enters the connecting groove. Under pressure, the inner fixing plate deforms, causing multiple sets of inner fixing plates to move closer together. As the outer fixing plate deforms inward along with the inner fixing plate, the dustproof and heat-insulating cotton is stably secured. When the kiln head hood detaches from the cylindrical body, the inner fixing plate returns to its original position. Compared to the previous fish-scale installation method, this eliminates the need for repeated disassembly.

Description

Technical Field

[0001] This application relates to the field of cement production technology, specifically to a rotary kiln head sealing structure for cement production. Background Technology

[0002] The rotary kiln head sealing structure for cement production is the core component that blocks the gap between the kiln head hood and the rotating kiln body. The mainstream adopts a multi-layer flexible composite fish scale sealing structure, which can adapt to the hot deformation of the kiln body and control the air leakage rate to 0.5%-1%, greatly reducing heat loss and dust overflow.

[0003] However, the sealing structure of the rotary kiln head used in cement production today requires disassembly of the sealing structure and multiple sets of fish scales when repairing the inside of the kiln head cover. After the repair, the sealing structure needs to be reinstalled, which is a complicated process and slow repair speed.

[0004] Therefore, it is necessary to provide a rotary kiln head sealing structure for cement production to solve the above problems.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Utility Model Content

[0006] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is to provide a rotary kiln head sealing structure for cement production, which solves the problem that when the inside of the kiln head cover is repaired, the sealing structure needs to be disassembled and then reinstalled after the repair, which is a cumbersome process with a slow repair rate.

[0007] The technical solution adopted by this application to solve its technical problem is: a rotary kiln head sealing structure for cement production, including a kiln head hood, a cylindrical body on one side of the kiln head hood, an inlet that cooperates with the cylindrical body on one side of the kiln head hood, a connecting pipe fixed on one side of the kiln head hood and outside the inlet, a connecting groove on the inner side of the connecting pipe, the connecting groove having a funnel-shaped cross-section, a chuck fixed on the outer side of the cylindrical body, a bottom plate on one side of the chuck, an inner fixing plate fixed on the inner side of the bottom plate, an outer fixing plate fixed on one side of the bottom plate, and dustproof and heat-insulating cotton between the outer fixing plate and the inner fixing plate.

[0008] Furthermore, there are two sets of chucks, each set of chucks has a cooperating fixing lug at both ends, a bolt is provided between the two sets of fixing lugs, and a high-temperature rubber pad is provided on the inner wall of the chuck.

[0009] Furthermore, a fixing plate is provided on the outside of the connecting pipe, and the fixing plate is connected to the kiln head cover by screws.

[0010] Furthermore, there are multiple sets of base plates, and one side of each set of base plates is provided with fixing screws that cooperate with the base plates.

[0011] Furthermore, there are multiple sets of inner fixing plates, and graphite blocks are provided on the outer side of the ends of the multiple sets of inner fixing plates.

[0012] The beneficial effects of this application are: 1. This application provides a rotary kiln head sealing structure for cement production. A connecting pipe is installed on one side of the kiln head hood using bolts, and a funnel-shaped connecting groove is opened on one side inside the connecting pipe. When the kiln head hood moves to one side, separating from the cylinder, maintenance can be performed inside the kiln head hood. After maintenance, simply push the kiln head hood back to its original position. Simultaneously, one end of the inner fixing plate gradually enters the connecting groove. Under the pressure, the inner fixing plate gradually deforms, causing multiple sets of inner fixing plates to move closer together. At the same time, the outer fixing plate deforms inwards as the inner fixing plate deforms, ensuring the dustproof and heat-insulating cotton is stably secured. When the kiln head hood detaches from the cylinder, the inner fixing plate returns to its original position. Compared to the previous fish-scale type fixing plate installation method, this eliminates the need for repeated disassembly, greatly reducing the labor intensity of maintenance personnel while increasing maintenance speed.

[0013] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the overall structure; Figure 2 This is a sectional view of the overall structure; Figure 3 This is an enlarged view of structure A.

[0015] The following are the labeling elements in the figure: 1. Kiln head hood; 2. Inlet; 3. Connecting pipe; 4. Fixing plate; 5. Connecting groove; 6. Cylinder; 7. Chuck; 8. Fixing lug; 9. Outer fixing plate; 10. Bottom plate; 11. Inner fixing plate; 12. Graphite block; 13. Dustproof and heat-insulating cotton; 14. Fixing screws. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0018] like Figure 1-3 As shown, this application provides a rotary kiln head sealing structure for cement production, including a kiln head hood 1. A cylindrical body 6 is provided on one side of the kiln head hood 1, and an inlet 2 is provided on one side of the kiln head hood 1 to cooperate with the cylindrical body 6, allowing the cylindrical body 6 to enter the interior of the kiln head hood 1. A sealing structure is provided at the inlet to ensure that no leakage of temperature or dust occurs at the gap. A connecting pipe 3 is fixed on one side of the kiln head hood 1, outside the inlet 2. A connecting groove 5 is provided on the inner side of the connecting pipe 3. The cross-section of the connecting groove 5 is a funnel structure. When the inner fixing plate 11 approaches the connecting groove 5, it gradually compresses and deforms multiple sets of inner fixing plates 11, causing multiple sets of inner fixing plates 11 to deform. The fixed plates are brought close together to form a relatively sealed cavity, completing one-sided sealing. A chuck 7 is fixed to the outside of the cylinder 6. A base plate 10 is provided on one side of the chuck 7. An inner fixed plate 11 is fixed to the inside of the base plate 10. An outer fixed plate 9 is fixed to one side of the base plate 10. When the inner fixed plate 11 deforms, the outer fixed plate 9 will quickly reset and form pressure on the inside when it is not pushed outward by the outer fixed plate, ensuring the relative clamping of the dustproof and heat-insulating cotton 13. Dustproof and heat-insulating cotton 13 is provided between the outer fixed plate 9 and the inner fixed plate 11. The dustproof and heat-insulating cotton 13 forms a secondary seal to ensure that the temperature is not lost and the dust is not spread.

[0019] In this embodiment, after repairing the interior of the kiln head cover 1, it is only necessary to push the kiln head cover 1 back to its original position using the existing power structure. It is common knowledge that the current design of the kiln head cover 1 has a structure that can move left and right. At the same time, one end of the inner fixing plate 11 gradually enters the interior of the connecting groove 5. At this time, the inner fixing plate 11 gradually deforms under the action of the extrusion force, thereby causing multiple sets of inner fixing plates 11 to move closer to each other. At this time, when the inner fixing plate 11 deforms inward, the outer fixing plate 9 will also deform inward, ensuring that the dustproof and heat insulation cotton 13 is stably clamped. When the kiln head cover 1 is separated from the cylinder 6, the inner fixing plate 11 is reset. Therefore, compared with the previous fish scale type fixing plate installation method, it is not necessary to disassemble repeatedly, which greatly reduces the labor intensity of maintenance personnel and improves the maintenance speed.

[0020] like Figure 1 and 3 As shown, there are two sets of chucks 7. Both ends of the two sets of chucks 7 are provided with mutually cooperating fixing ears 8. Bolts are provided between the two sets of fixing ears 8. The inner wall of the chuck 7 is provided with a high-temperature rubber pad. The outer side of the connecting pipe 3 is provided with a fixing plate 4. The fixing plate 4 is connected to the kiln head cover 1 by screws.

[0021] In this embodiment, two sets of split chucks 7 are provided, and rubber pads are used to ensure that there is no gap between the chucks 7 and the cylinder 6. Bolts are used with fixing ears 8 to fasten the two sets of chucks 7 to prevent relative sliding between the cylinder 6 and the chucks 7. The screws are tightened in conjunction with the high-temperature rubber pads to complete the stable connection between the fixing plate 4 and the kiln head cover 1, preventing gaps and relative rotation, thereby completing the installation and fixing of the connecting pipe 3.

[0022] like Figure 3 As shown, there are multiple sets of base plates 10, and one side of each set of base plates 10 is provided with fixing screws 14 that cooperate with the base plates 10. There are multiple sets of inner fixing plates 11, and graphite blocks 12 are provided on the outer side of the ends of each set of inner fixing plates 11.

[0023] In this embodiment, multiple sets of base plates 10, together with fastening screws, complete the installation and fixation of the outer fixing plate 9 and the inner fixing plate 11. The multiple sets of inner fixing plates 11 deform inward to fit the outer edge of the graphite block 12 into the funnel-shaped connecting groove 5 of the connecting pipe 3. A reasonable dynamic fit gap is reserved between the outer wall of the graphite block 12 and the groove wall of the connecting groove 5, which does not affect the normal rotation of the cylinder 6 and can form a tight dynamic seal.

[0024] Working principle: First, two sets of split chucks 7 are fitted together at designated positions on the outer wall of the rotary kiln body 6. The bolts between the fixing ears 8 are tightened, and the high-temperature rubber pads on the inner wall of the chucks 7 achieve a non-slip fixation with the body 6. Then, multiple sets of base plates 10 are sequentially locked to the end faces of the chucks 7 with fixing screws 14. The cavity between the inner and outer fixing plates is filled with compacted dustproof and heat-insulating cotton 13. Then, graphite blocks 12 are embedded and fixed at the ends of each inner fixing plate 11. Finally, the connecting pipe 3 is coaxially locked to the inlet 2 on the outer wall of the kiln head cover 1 through the outer fixing plate 4. The installation position is adjusted so that all graphite blocks 12 extend into the funnel-shaped connecting groove 5, completing the entire installation operation.

[0025] During equipment operation, the graphite block 12, which rotates synchronously with the cylinder 6, forms the first dynamic sealing barrier inside the funnel-shaped connecting groove 5, blocking most of the high-temperature flue gas and dust from overflowing outwards; the dustproof and heat-insulating cotton 13 between the inner fixing plate 11 and the outer fixing plate 9 forms the second sealing barrier, further intercepting fine dust and blocking the outward conduction of high-temperature heat; the labyrinth channel formed by the funnel-shaped connecting groove 5 greatly extends the leakage path, ultimately achieving a stable sealing effect of low air leakage, low dust, and low heat loss at the kiln head.

[0026] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A rotary kiln head sealing structure for cement production, comprising a kiln head cover (1), one side of the kiln head cover (1) is provided with a cylinder (6), one side of the kiln head cover (1) is provided with an inlet (2) matched with the cylinder (6), characterized in that: A connecting pipe (3) is fixed on one side of the kiln head cover (1) and outside the inlet (2). A connecting groove (5) is opened on the inner side of the connecting pipe (3). The cross-section of the connecting groove (5) is a funnel structure. A chuck (7) is fixed on the outer side of the cylinder (6). A bottom plate (10) is provided on one side of the chuck (7). An inner fixing plate (11) is fixed on the inner side of the bottom plate (10). An outer fixing plate (9) is fixed on one side of the bottom plate (10). Dustproof and heat-insulating cotton (13) is provided between the outer fixing plate (9) and the inner fixing plate (11).

2. The kiln head sealing structure for a rotary cement kiln according to claim 1, characterized in that: The number of chucks (7) is two sets. Both ends of the two sets of chucks (7) are provided with mutually cooperating fixing ears (8). Bolts are provided between the two sets of fixing ears (8). The inner wall of the chucks (7) is provided with a high-temperature rubber pad.

3. The rotary kiln head sealing structure for cement production according to claim 1, characterized in that: The connecting pipe (3) is provided with a fixing plate (4) on the outside, and the fixing plate (4) is connected to the kiln head cover (1) by screws.

4. The kiln head seal structure for a rotary cement kiln according to claim 1, characterized in that: The number of base plates (10) is multiple sets, and one side of each set of base plates (10) is provided with fixing screws (14) that cooperate with the base plates (10).

5. The kiln head seal structure for a rotary cement kiln according to claim 1, characterized in that: The number of inner fixing plates (11) is multiple sets, and graphite blocks (12) are provided on the outer side of the ends of the multiple sets of inner fixing plates (11).

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