A rotary kiln head sealing device

Abstract

This utility model relates to the field of kiln head sealing technology, and provides a rotary kiln kiln head sealing device, including a kiln body. Sealing structures are fixed at both ends of the kiln body. A pressing structure is evenly arranged on the outer side of the sealing structure. The pressing structure includes a connecting shaft, a spring, a limiting plate, and a mounting plate. The connecting shaft evenly penetrates the outer side of the sealing structure, and one end of the connecting shaft extends to the outside of the sealing structure and is fixed to the limiting plate. By providing the pressing structure, under the extension and contraction of the spring, the connecting disc can push the sealing stationary ring, causing the sealing stationary ring to continuously press against the sealing moving ring, compensating for the increase in gap caused by wear in real time. The evenly distributed connecting shafts ensure uniform pressure and avoid local leakage, enabling the device to automatically press the sealing surface, thus improving the applicability of the rotary kiln kiln head sealing device in use.

Description

Technical Field

[0001] This utility model relates to the field of kiln head sealing technology, and in particular to a rotary kiln kiln head sealing device. Background Technology

[0002] Rotary kilns are key thermal equipment widely used in industries such as cement, metallurgy, chemicals, and environmental protection. The sealing performance of the kiln head directly affects production efficiency and environmental compliance. However, due to the complex operating conditions of rotary kilns, including high temperature, rotation, thermal expansion, dust, and corrosive gases, a rotary kiln head sealing device needs to be designed.

[0003] To address this issue, patent CN211739838U discloses a negative pressure sealing device for the kiln head and tail of a rotary kiln. The device includes a rotary kiln body, with a kiln head sealing device at the kiln head and a kiln tail sealing device at the kiln tail. Both the kiln head and tail sealing devices are equipped with negative pressure sealing devices. This invention features a simple structure, convenient operation, and effectively solves the problem of gas leakage in rotary kilns.

[0004] Although the rotary kiln head and tail negative pressure sealing device mentioned above can seal the kiln head during use, the rotation of the kiln body and thermal expansion will cause the rigid seal to wear or fall off, affecting the sealing effect. Therefore, it is necessary to design a rotary kiln head sealing device. Utility Model Content

[0005] The purpose of this invention is to provide a rotary kiln head sealing device to solve the defects of existing rotary kiln head sealing devices where kiln body rotation and thermal expansion cause rigid seals to wear or fall off, affecting the sealing effect.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a rotary kiln head sealing device, including a kiln body 1;

[0007] Both ends of the kiln body 1 are fixed with sealing structures 2;

[0008] A pressing structure 3 is evenly provided on the outer side of the sealing structure 2;

[0009] The clamping structure 3 includes a connecting shaft 31, a spring 32, a limiting plate 33, and a mounting plate 34. The connecting shaft 31 extends evenly through the outside of the sealing structure 2. One end of the connecting shaft 31 extends to the outside of the sealing structure 2 and is fixed with the limiting plate 33. The other end of the connecting shaft 31 extends to the inside of the sealing structure 2 and is fixed with the mounting plate 34. The outer wall of the connecting shaft 31 near the spring 32 is provided with the limiting plate 33.

[0010] Furthermore, the sealing structure 2 includes a flange 21, a sealing moving ring 22, a sealing fixed ring 23, a connecting plate 24, a connecting groove 25, and a connecting ring 26. The flange 21 is fixed to both ends of the kiln body 1. The sealing moving ring 22 is bolted to one side of the flange 21. The connecting plate 24 is provided on one side of the sealing moving ring 22. The sealing fixed ring 23 is fixed to the side of the connecting plate 24 near the sealing moving ring 22.

[0011] Furthermore, each of the sealing rings 23 has a connecting groove 25 inside, and each of the sealing rings 22 has a connecting ring 26 fixed on the side near the connecting groove 25.

[0012] Furthermore, the connecting ring 26 and the sealing ring 23 are engaged and connected by the connecting groove 25, with one side of the sealing ring 22 and one side of the sealing ring 23 fitting together.

[0013] Furthermore, the connecting ring 26 is a silicon carbide coated metal ring.

[0014] Furthermore, the connecting shafts 31 are evenly distributed inside the connecting plate 24, and are fixedly connected to one side of the mounting plate 34 and one side of the flange 21.

[0015] Furthermore, the connecting shaft 31 and the limiting plate 33 form a telescopic mechanism via the spring 32.

[0016] The rotary kiln head sealing device provided by this utility model has the following advantages:

[0017] With the clamping structure 3 in place, the sealing ring 23 can be pushed by the connecting plate 24 under the extension and retraction of the spring 32, so that the sealing ring 23 continuously presses the sealing ring 22, and compensates for the increase in gap caused by wear in real time. The equally spaced connecting shafts 31 can ensure uniform pressure and avoid local leakage, thus realizing the function of the device to automatically press the sealing surface, and improving the applicability of the rotary kiln head sealing device in use.

[0018] By incorporating a sealing structure 2, the cooperation between the sealing moving ring 22 and the sealing fixed ring 23 can adapt to the rotation and thermal expansion of the rotary kiln, avoiding wear or detachment caused by rigid friction. The connecting ring 26 is a silicon carbide coated metal ring with good wear resistance, which can extend its service life. The engaging structure between the connecting groove 25 and the connecting ring 26 can ensure precise alignment of the sealing fixed ring 23 and the sealing moving ring 22, preventing misalignment and leakage. This device has the function of easy sealing and alignment, improving the working efficiency of the rotary kiln head sealing device during use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional exploded structure of this utility model;

[0020] Figure 2This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0021] Figure 3 This is a three-dimensional structural schematic diagram of the main cross-section of this utility model;

[0022] Figure 4 For the present utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0023] Figure 5 This is a top-view cross-sectional three-dimensional structural diagram of the present invention.

[0024] The following are the annotations in the figure: 1. Kiln body; 2. Sealing structure; 21. Flange; 22. Sealing moving ring; 23. Sealing stationary ring; 24. Connecting plate; 25. Connecting groove; 26. Connecting ring; 3. Pressing structure; 31. Connecting shaft; 32. Spring; 33. Limiting plate; 34. Mounting plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-5 The present invention provides a rotary kiln head sealing device, comprising a kiln body 1.

[0027] Reference Figures 1-5 Both ends of the kiln body 1 are fixed with sealing structures 2. The sealing structure 2 includes a flange 21, a sealing moving ring 22, a sealing fixed ring 23, a connecting plate 24, a connecting groove 25, and a connecting ring 26. The flanges 21 are fixed to both ends of the kiln body 1. A sealing moving ring 22 is bolted to one side of the flange 21. A connecting plate 24 is provided on one side of the sealing moving ring 22. A sealing fixed ring 23 is fixed to the side of the connecting plate 24 near the sealing moving ring 22. Furthermore, a connecting groove 25 is opened inside the sealing fixed ring 23. A connecting ring 26 is fixed to the side of the sealing moving ring 22 near the connecting groove 25. The connecting ring 26 and the sealing fixed ring 23 are engaged and connected through the connecting groove 25. One side of the sealing moving ring 22 and one side of the sealing fixed ring 23 fit together. The connecting ring 26 is a silicon carbide coated metal ring.

[0028] The sealing moving ring 22 is fixed to the outer wall of the kiln body 1 by the flange 21 and rotates synchronously with the kiln body 1. The sealing stationary ring 23 is fixed to the stationary feed hood by the connecting plate 24 and forms a relative motion interface with the sealing moving ring 22. One side of the sealing moving ring 22 and one side of the sealing stationary ring 23 fit together to achieve a seal. When the kiln body 1 expands thermally, it is adaptively adjusted by the sliding displacement of the connecting groove 25 to avoid jamming. The silicon carbide coated connecting ring 26 contacts the sealing stationary ring 23 and uses its self-lubricating property to reduce frictional heat while maintaining airtightness.

[0029] Reference Figures 1-5 A pressing structure 3 is evenly arranged on the outer side of the sealing structure 2. The pressing structure 3 includes a connecting shaft 31, a spring 32, a limiting plate 33, and a mounting plate 34. The connecting shaft 31 is evenly arranged through the outer side of the sealing structure 2. One end of the connecting shaft 31 extends to the outside of the sealing structure 2 and is fixed with the limiting plate 33. The other end of the connecting shaft 31 extends to the inside of the sealing structure 2 and is fixed with the mounting plate 34. The outer wall of the connecting shaft 31 near the spring 32 is provided with the limiting plate 33. The connecting shaft 31 is evenly distributed inside the connecting plate 24. One side of the mounting plate 34 is fixedly connected to one side of the flange 21. The connecting shaft 31 and the limiting plate 33 form a telescopic mechanism through the spring 32.

[0030] When the kiln body 1 rotates or thermally expands, the gap between the sealing surfaces changes. The spring 32 pushes the connecting plate 24 to move axially along the connecting shaft 31, re-pressing the sealing ring 23 so that the sealing ring 23 always fits against one side of the sealing ring 22, compensating for the increase in gap caused by wear in real time. The equally spaced connecting shafts 31 can ensure uniform pressure and avoid local leakage.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rotary kiln head sealing device, comprising a kiln body (1); Its features are: Both ends of the kiln body (1) are fixed with sealing structures (2); The sealing structure (2) is uniformly provided with a pressing structure (3) on its outer side; The clamping structure (3) includes a connecting shaft (31), a spring (32), a limiting plate (33), and a mounting plate (34). The connecting shaft (31) runs evenly through the outside of the sealing structure (2). One end of the connecting shaft (31) extends to the outside of the sealing structure (2) and is fixed with the limiting plate (33). The other end of the connecting shaft (31) extends to the inside of the sealing structure (2) and is fixed with the mounting plate (34). The outer wall of the connecting shaft (31) near the spring (32) is provided with a limiting plate (33).

2. The rotary kiln head sealing device according to claim 1, characterized in that: The sealing structure (2) includes a flange (21), a sealing moving ring (22), a sealing fixed ring (23), a connecting plate (24), a connecting groove (25), and a connecting ring (26). The flange (21) is fixed to both ends of the kiln body (1). The sealing moving ring (22) is bolted to one side of the flange (21). The connecting plate (24) is provided on one side of the sealing moving ring (22). The sealing fixed ring (23) is fixed to the side of the connecting plate (24) near the sealing moving ring (22).

3. The rotary kiln head sealing device according to claim 2, characterized in that: The sealing ring (23) has a connecting groove (25) inside, and the sealing ring (22) has a connecting ring (26) fixed on the side near the connecting groove (25).

4. The rotary kiln head sealing device according to claim 2, characterized in that: The connecting ring (26) and the sealing ring (23) are engaged and connected by the connecting groove (25), and one side of the sealing ring (22) and one side of the sealing ring (23) are in contact with each other.

5. A rotary kiln head sealing device according to claim 2, characterized in that: The connecting ring (26) is a silicon carbide coated metal ring.

6. The rotary kiln head sealing device according to claim 1, characterized in that: The connecting shafts (31) are evenly distributed inside the connecting plate (24), and one side of the mounting plate (34) is fixedly connected to one side of the flange (21).

7. The rotary kiln head sealing device according to claim 1, characterized in that: The connecting shaft (31) and the limiting plate (33) form a telescopic mechanism via a spring (32).

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