A rotary kiln sealing structure

Abstract

The utility model relates to rotary kiln sealing technical field discloses a rotary kiln sealing structure, including rotary kiln, both ends of rotary kiln are provided with the connecting pipe, two the connecting pipe opposite one end extends to the rotary kiln inside, the rotary kiln inner wall both sides are provided with fixed shell, each The fixed shell inner wall is slidably connected with sealing ring no.

Description

Technical Field

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

[0002] Rotary kilns, widely used in building materials, metallurgy, and chemical industries, are primarily used for high-temperature calcination and roasting of materials. During operation, the sealing at both ends of the kiln is crucial, as its performance directly affects the kiln's thermal regime, energy consumption, and production efficiency. A good sealing structure effectively prevents the leakage of high-temperature gases and the ingress of cold air, ensuring a stable temperature and atmosphere within the kiln and guaranteeing that materials are processed thoroughly and uniformly.

[0003] Currently, most common rotary kiln end-capping structures employ contact seals, such as labyrinth seals, counterweight seals, and simple packing seals. Labyrinth seals rely on multiple layers of annular sealing plates to form a tortuous channel, utilizing the resistance of airflow within the channel to achieve a seal. Counterweight seals use the pressure of a counterweight to ensure a tight fit between the seal and the kiln body. Packing seals fill the sealing space with packing material, relying on the elastic deformation of the packing to seal the gaps. These sealing structures are primarily based on the principles of mechanical contact and physical barrier, aiming to reduce gas and material leakage.

[0004] However, due to the harsh working environment of rotary kilns, which are characterized by high temperatures, high dust levels, and complex chemical corrosion, existing sealing components are prone to aging, hardening, or embrittlement. Once the sealing components lose their original elasticity, the sealing surfaces cannot fit tightly, leading to an increase in the sealing gap. This causes high-temperature gases to leak out of the kiln and cold air to enter, which not only reduces the thermal efficiency of the rotary kiln and increases energy consumption, but also affects the normal thermal regime inside the kiln, thus adversely affecting the calcination quality of the materials. Therefore, a rotary kiln sealing structure is proposed to solve the above problems. Summary of the Invention

[0005] To overcome the above shortcomings, this utility model provides a rotary kiln sealing structure, which aims to improve the problem that the sealing components of traditional equipment are prone to aging, hardening or embrittlement due to long-term exposure to high temperature and harsh environment, resulting in loss of original elasticity and sealing performance and reduced sealing performance.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A rotary kiln sealing structure includes a rotary kiln with connecting pipes at both ends. Two connecting pipes extend into the interior of the rotary kiln through opposite ends. Fixed shells are provided on both sides of the inner wall of the rotary kiln. A second sealing ring is slidably connected to the inner wall of each fixed shell. Each second sealing ring is located at one end of the connecting pipe. A first sealing ring is fixedly connected to the inner wall of each fixed shell. The inner wall of the first sealing ring is in contact with the outer wall of the connecting pipe. A pushing component is provided on one side of each of the second sealing rings.

[0008] As a further description of the above technical solution:

[0009] The pushing assembly includes multiple springs, each spring located inside the fixed housing. One end of each spring is fixedly connected to one side of the sealing ring two, and the other end of each spring is fixedly connected to one side of the inner wall of the fixed housing.

[0010] As a further description of the above technical solution:

[0011] The second sealing ring has a groove inside, and the inner wall of the groove fits against the inner wall of the connecting pipe.

[0012] As a further description of the above technical solution:

[0013] Each of the fixed shells has a groove inside one side, and the inner wall of the groove fits the outer wall of the connecting pipe.

[0014] As a further description of the above technical solution:

[0015] Each of the fixed shells has a fixed block fixedly connected to its outer wall, and the outer walls of the two fixed blocks are fixedly connected to the inner wall of the rotary kiln.

[0016] As a further description of the above technical solution:

[0017] Each of the connecting pipes is fixedly connected to a flange on its outer wall, and the flange is fixedly connected to both ends of the rotary kiln by bolts.

[0018] This utility model has the following beneficial effects:

[0019] In this invention, the inner wall groove of the sealing ring two fully wraps one end of the connecting pipe. At the same time, the pushing component pushes the sealing ring two to fully compress and fit with one end of the connecting pipe. Furthermore, the sealing ring one seals the connection between the inner wall of the fixing shell and the outer wall of the connecting pipe, achieving a sealing effect at both ends of the equipment. This solves the problem that the sealing components of traditional equipment are prone to aging, hardening, or embrittlement due to long-term exposure to high temperature and harsh environments, resulting in loss of original elasticity and sealing performance and reduced sealing performance. This invention enhances the sealing performance of the equipment. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of a rotary kiln sealing structure proposed in this utility model;

[0021] Figure 2 This is a schematic diagram of the connecting pipe structure of a rotary kiln sealing structure proposed in this utility model;

[0022] Figure 3 This is a schematic diagram of the fixed shell structure of a rotary kiln sealing structure proposed in this utility model;

[0023] Figure 4 This is a schematic diagram of the spring structure of a rotary kiln sealing structure proposed in this utility model;

[0024] Figure 5 This is a schematic diagram of the sealing ring structure 2 of the rotary kiln sealing structure proposed in this utility model;

[0025] Figure 6 This is a schematic diagram of the sealing ring structure of a rotary kiln sealing structure proposed in this utility model.

[0026] Legend:

[0027] 1. Rotary kiln; 2. Connecting pipe; 3. Fixing block; 4. Fixing shell; 5. Sealing ring one; 6. Sealing ring two; 7. Spring; 8. Flange. Detailed Implementation

[0028] 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.

[0029] Reference Figures 1-6This utility model provides an embodiment of a rotary kiln sealing structure, comprising a rotary kiln 1. During operation, pre-treated material is fed into the kiln from the tail end. The kiln rotates at a certain speed, and the material moves slowly towards the kiln head along the kiln axis under the combined effects of gravity and the kiln's rotation. During this process, fuel is injected into the kiln head, generating high-temperature flames and hot gas. Heat is transferred to the material through radiation, convection, and conduction, causing a series of physicochemical reactions such as calcination and decomposition at high temperatures, ultimately achieving the desired processing effect. The finished material is discharged from the kiln head. This is prior art and will not be elaborated further. Connecting pipes 2 are provided at both ends of the rotary kiln 1, extending through to the interior of the rotary kiln 1 at opposite ends. The connecting pipes 2 are used to transport materials or gas and also serve as the core carrier of the sealing structure. Both sides are provided with fixed shells 4, which, together with sealing ring 1 5 and sealing ring 2 6, form a sealed cavity, providing a stable installation space for elastic sealing. A sealing ring 2 6 is slidably connected to the inner wall of each fixed shell 4. The sealing ring 2 6 fits tightly against the end face of the connecting pipe 2 through an internal groove, achieving a dynamic sealing effect. Each sealing ring 2 6 is located at one end of the connecting pipe 2. A sealing ring 1 5 is fixedly connected to the inner wall of each fixed shell 4. The sealing ring 1 5 is used to fill the radial gap between the fixed shell 4 and the connecting pipe 2 to prevent media leakage. The inner wall of the sealing ring 1 5 fits tightly against the end face of the connecting pipe 2. The outer wall of the pipe 2 is in contact with the sealing ring 6. A pushing assembly is provided on one side of each sealing ring 6. The pushing assembly includes multiple springs 7. The springs 7 provide continuous clamping force through elastic deformation, maintaining the contact pressure between the sealing ring 6 and the connecting pipe 2. Each spring 7 is located inside the fixed shell 4. One end of each spring 7 is fixedly connected to one side of the sealing ring 6, and the other end is fixedly connected to one side of the inner wall of the fixed shell 4. A groove is formed inside the sealing ring 6, and the inner wall of the groove fits against the inner wall of the connecting pipe 2. The groove structure enhances the sealing contact area and improves sealing reliability. Each fixed shell 4 has a groove on one side of its interior. The inner wall of the groove fits the outer wall of the connecting pipe 2. The groove guides the axial movement of the connecting pipe 2 to ensure alignment accuracy. Each fixed shell 4 has a fixed block 3 fixedly connected to its outer wall. The fixed block 3 firmly fixes the sealing system to the inner wall of the rotary kiln 1. The outer walls of the two fixed blocks 3 are fixedly connected to the inner wall of the rotary kiln 1. Each connecting pipe 2 has a flange 8 fixedly connected to its outer wall. The flange 8 is fixedly connected to both ends of the rotary kiln 1 by bolts. The flange 8 achieves a rigid connection between the connecting pipe 2 and the rotary kiln 1, while also facilitating disassembly and maintenance.

[0030] Working principle: During the sealing process at both ends of the rotary kiln 1, the connecting pipe 2 is inserted into the inner wall of the fixed shell 4 through the holes at both ends of the rotary kiln 1 until it fits against the inner wall of the sealing ring 6. The groove on the inner wall of the sealing ring 6 completely wraps around one end of the connecting pipe 2. When the connecting pipe 2 squeezes the inner wall of the sealing ring 6, it pushes the sealing ring 6 to slide on the inner wall of the fixed shell 4, and compresses the spring 7. The rebound force of the spring 7 rebounds this squeezing force to the surface of the sealing ring 6, making the inner wall of the sealing ring 6 and one end of the connecting pipe 2 fit tightly. At the same time, the inner wall of the fixed shell 4 uses the outer surface of the sealing ring 6 to... The sidewalls are fully covered to ensure proper positioning of the sealing ring 26, preventing it from shifting or tilting during compression, which could lead to gaps between the sealing ring 2 and one end of the connecting pipe 2. Subsequently, the sealing ring 15 is used to seal the connection between the inner wall of the fixed shell 4 and the outer wall of the connecting pipe 2, achieving a sealing effect at both ends of the equipment. This solves the problem that traditional equipment sealing components are prone to aging, hardening, or embrittlement due to long-term exposure to high temperatures and harsh environments, resulting in loss of elasticity and sealing performance and reduced sealing performance, thus enhancing the equipment's sealing performance.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A rotary kiln sealing structure comprising a rotary kiln (1), characterized in that: The rotary kiln (1) is provided with connecting pipes (2) at both ends. The two connecting pipes (2) extend through one end to the interior of the rotary kiln (1). The inner walls of the rotary kiln (1) are provided with fixed shells (4) on both sides. Each fixed shell (4) is slidably connected with a sealing ring II (6). Each sealing ring II (6) is located at one end of the connecting pipe (2). Each fixed shell (4) is fixedly connected with a sealing ring I (5). The inner wall of the sealing ring I (5) is in contact with the outer wall of the connecting pipe (2). A pushing component is provided on one side of the multiple sealing rings II (6).

2. The rotary kiln sealing structure according to claim 1, characterized in that: The pushing assembly includes multiple springs (7), each spring (7) is located inside the fixed shell (4), one end of each spring (7) is fixedly connected to one side of the sealing ring (6), and the other end of each spring (7) is fixedly connected to one side of the inner wall of the fixed shell (4).

3. The rotary kiln sealing structure according to claim 1, characterized in that: The sealing ring 2 (6) has a groove inside, and the inner wall of the groove fits against the inner wall of the connecting pipe (2).

4. The rotary kiln sealing structure according to claim 1, characterized in that: Each of the fixed shells (4) has a groove on one side, and the inner wall of the groove is in contact with the outer wall of the connecting pipe (2).

5. The rotary kiln sealing structure according to claim 1, characterized in that: Each of the fixed shells (4) has a fixed block (3) fixedly connected to its outer wall, and the outer walls of the two fixed blocks (3) are fixedly connected to the inner wall of the rotary kiln (1).

6. The rotary kiln sealing structure according to claim 1, characterized in that: Each of the connecting pipes (2) is fixedly connected to a flange (8) on its outer wall, and the flange (8) is fixedly connected to both ends of the rotary kiln (1) by bolts.

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