Rotary kiln sealing structure with better sealing effect

Abstract

The utility model relates to the technical field of rotary kiln sealing, and discloses a rotary kiln sealing structure with better sealing effect, which comprises a rotary kiln cylinder and a kiln cover, a plurality of fixing plates are fixedly connected to the outer side of the kiln cover, the fixing plates are fixedly connected to the outer side of the rotary kiln cylinder through bolts, a first sealing mechanism is arranged in the kiln cover, and a second sealing mechanism is arranged in the kiln cover. A second sealing mechanism is arranged on the outer side of the rotary kiln cylinder, the first sealing mechanism comprises a mounting plate and a third sealing gasket, the mounting plate is connected into the kiln cover in a sliding mode, and a plurality of springs are arranged in the kiln cover. According to the utility model, the first sealing mechanism is adopted, and the third sealing gasket is always clung to the rotary kiln cylinder under the action of the spring, so that the sealing effect is ensured. Meanwhile, due to the interference fit design of a rubber ring and a groove in the connecting assembly, a third sealing gasket is more convenient to replace, and compared with the prior art that a sealing gasket is tedious to replace and prone to loosening, the maintenance efficiency is improved, and the downtime is shortened.

Description

TECHNICAL FIELD

[0001] The utility model relates to rotary kiln sealing technical field especially relates to a rotary kiln sealing structure with better sealing effect. BACKGROUND

[0002] Rotary kiln is widely used in metallurgy, building material, chemical industry and other industries, mainly used for material calcination, drying, conversion and other processes. The working environment temperature of rotary kiln is extremely high, and in the long-term operation process, it will be disturbed by external factors such as dust and airflow. Therefore, the efficient sealing system is crucial. The rotary kiln sealing structure can effectively avoid the leakage of kiln gas and dust through the design of multiple sealing mechanisms, while reducing energy loss and environmental pollution. The stability of the sealing structure can improve the working efficiency of the rotary kiln, reduce the maintenance frequency, thereby greatly improving the service life and economic benefit of the rotary kiln.

[0003] The current rotary kiln sealing structure has some shortcomings. First, the replacement process of the sealing pad is complex, and the existing technology generally adopts fixed connection, which is cumbersome to disassemble, resulting in low maintenance efficiency. At the same time, the sealing pad fixing method is relatively single, the sealing effect is not good, the frequency of shutdown maintenance is increased, and the production efficiency is reduced. Secondly, the sealing effect is unstable, and the traditional sealing method mostly uses a single sealing layer. In the high-temperature and high-dust working environment, the sealing pad is easy to age and deform, leading to sealing failure, making it difficult to maintain stable sealing state for a long time, and further causing gas leakage and dust overflow, which not only affects the equipment operation, but also pollutes the environment. In addition, the existing sealing structure has poor high-temperature resistance and wear resistance, and usually uses a single material sealing layer. When facing high-temperature and high-speed rotating working conditions, the sealing material is easy to fail quickly due to thermal expansion, oxidation or wear, lacks the support of a protective layer, and the service life of the sealing system is short, resulting in a substantial increase in equipment maintenance cost and operating cost.

[0004] Therefore, a rotary kiln sealing structure with better sealing effect is proposed to solve the above problems. Utility model content

[0005] In order to make up for the above shortcomings, the utility model provides a rotary kiln sealing structure with better sealing effect, aiming at improving the problems of complex replacement of existing sealing pad, unstable sealing performance and insufficient high-temperature resistance and wear resistance.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: a rotary kiln sealing structure with better sealing effect, comprising a rotary kiln cylinder and a kiln cover, a plurality of fixed plates are fixedly connected outside the kiln cover, the fixed plates are fixedly connected outside the rotary kiln cylinder through bolts, a first sealing mechanism is arranged inside the kiln cover, and a second sealing mechanism is arranged outside the rotary kiln cylinder.

[0007] The first sealing mechanism comprises a mounting plate and a third sealing pad, the mounting plate is slidingly connected inside the kiln cover, a plurality of springs are arranged in the kiln cover, and the third sealing pad is arranged outside the mounting plate, and a connecting assembly is arranged between the third sealing pad and the mounting plate.

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

[0009] The second sealing mechanism comprises a plurality of first sealing pads, a plurality of first sealing pads are arranged at the connection between the rotary kiln cylinder and the kiln cover, a second sealing pad is arranged at the connection between every two first sealing pads, and two steel hoop rings are arranged outside the second sealing pad, one of which is located outside the rotary kiln cylinder and the other is located outside the kiln cover.

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

[0011] The connecting assembly comprises a plurality of circular columns, a plurality of circular columns are fixedly connected to one side of the third sealing pad close to the mounting plate, a rubber ring is fixedly connected to the outside of the circular column, a plurality of mounting holes are formed in the outside of the mounting plate, and a groove is formed in the inside of the mounting hole.

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

[0013] The rotary kiln cylinder is internally provided with a high-temperature-resistant soft sealing material, and the high-temperature-resistant soft sealing material is externally provided with a graphite sealing layer.

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

[0015] The graphite sealing layer is externally provided with a ceramic sealing sleeve layer, and the ceramic sealing sleeve layer is externally provided with a wear-resistant metal layer.

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

[0017] One end of the rotary kiln cylinder abuts against the surface of the third sealing pad, and the first sealing pad abuts against the surface of the rotary kiln cylinder and the kiln cover.

[0018] As a further description of the above technical scheme:

[0019] One end of the spring is fixedly connected to the inner wall of the kiln cover, and the other end of the spring is fixedly connected to the side of the mounting plate away from the third sealing pad.

[0020] As a further description of the above technical scheme:

[0021] The plurality of circular columns correspond to the plurality of mounting holes one by one, and the rubber ring is clamped in the groove.

[0022] The utility model has the following beneficial effects:

[0023] 1. In the utility model, adopt first sealing mechanism, through spring effect, make third sealing pad always close rotary kiln cylinder, ensure sealing effect.

[0024] 2. In the utility model, adopt second sealing mechanism cooperation first sealing mechanism, through the combination structure of first sealing pad and second sealing pad, realize multiple sealing, and through the compression of steel hoop ring, improve the reliability of sealing.

[0025] 3. In the utility model, through the combination of multilayer sealing structure inside rotary kiln cylinder, high temperature resistant soft sealing material, graphite sealing layer, ceramic sealing sleeve layer and wear-resistant metal layer, the sealing layer has excellent properties such as high temperature resistance, oxidation resistance and wear resistance. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A kind of sealing effect better rotary kiln sealing structure's three-dimensional schematic view is proposed for the utility model;

[0027] Figure 2 A kind of sealing effect better rotary kiln sealing structure's rotary kiln cylinder explosion's structural schematic view is proposed for the utility model;

[0028] Figure 3 A kind of sealing effect better rotary kiln sealing structure's second sealing mechanism explosion's structural schematic view is proposed for the utility model;

[0029] Figure 4 A kind of sealing effect better rotary kiln sealing structure's cave cover explosion's structural schematic view is proposed for the utility model;

[0030] Figure 5 A kind of sealing effect better rotary kiln sealing structure's third sealing pad's structural schematic view is proposed for the utility model;

[0031] Figure 6 A kind of sealing effect better rotary kiln sealing structure's mounting plate's structural schematic view is proposed for the utility model;

[0032] Figure 7The utility model provides a rotary kiln sealing structure's rotary kiln cylinder section structure schematic view of better sealing effect is proposed.

[0033] Legend:

[0034] 1, rotary kiln cylinder; 2, hoop ring; 3, kiln cover; 4, first sealing pad; 5, second sealing pad; 6, fixed plate; 7, third sealing pad; 8, mounting plate; 9, spring; 10, mounting hole; 11, rubber ring; 12, circular column; 13, groove; 14, high-temperature-resistant soft sealing material; 15, wear-resistant metal layer; 16, ceramic sealing sleeve layer; 17, graphite sealing layer. Specific embodiments

[0035] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0036] Reference Figure 1 - Figure 7 An embodiment provided by the utility model: a rotary kiln sealing structure with better sealing effect, comprising a rotary kiln cylinder 1 and a kiln cover 3, the kiln cover 3 is fixedly connected with a plurality of fixed plates 6 on the outside, the fixed plates 6 are fixedly connected on the outside of the rotary kiln cylinder 1 through bolts, the kiln cover 3 is internally provided with a first sealing mechanism, and the rotary kiln cylinder 1 is externally provided with a second sealing mechanism.

[0037] The first sealing mechanism includes a mounting plate 8 and a third sealing gasket 7. The mounting plate 8 is slidingly connected inside the kiln cover 3, which is provided with a plurality of springs 9. The third sealing gasket 7 is arranged outside the mounting plate 8, and a connecting assembly is arranged between the third sealing gasket 7 and the mounting plate 8. One end of the spring 9 is fixedly connected to the inner wall of the kiln cover 3, and the other end is fixedly connected to the side of the mounting plate 8 away from the third sealing gasket 7. The rotary kiln cylinder 1 serves as the main body of the entire device and bears the functions of material calcination and transmission. The kiln cover 3 is used to cover the rotary kiln cylinder 1 to form a closed space, prevent external environment from interfering with the internal airflow of the rotary kiln, and provide a sealing support structure. The fixed plate 6 is fixed outside the kiln cover 3 and is fixedly connected to the outside of the rotary kiln cylinder 1 by bolts, so that the kiln cover 3 is stably connected to the rotary kiln, improving the stability of the overall structure. The first sealing mechanism is arranged inside the kiln cover 3, enhancing the sealing effect and preventing gas leakage. The second sealing mechanism is arranged outside the rotary kiln cylinder 1 and cooperates with the first sealing mechanism to provide double sealing protection. The mounting plate 8 is slidingly connected inside the kiln cover 3, so that the sealing structure can adapt to the movement changes of the rotary kiln, improving the reliability of the sealing. The third sealing gasket 7 is arranged outside the mounting plate 8 to play a sealing role and prevent gas leakage in the kiln. The connecting assembly is used to connect the third sealing gasket 7 and the mounting plate 8, ensuring that the sealing gasket is fixed and can be adjusted with the sliding of the mounting plate 8. One end of the spring 9 is fixedly connected to the inner wall of the kiln cover 3, and the other end is fixedly connected to the side of the mounting plate 8 away from the third sealing gasket 7, so that the mounting plate 8 can be kept stable under the action of the spring 9 and adapt to the rotary motion of the kiln body, ensuring that the sealing gasket continuously adheres to the rotary kiln cylinder 1 and improving the sealing performance.

[0038] Referring to Figure 1 - Figure 4The second sealing mechanism comprises a plurality of first sealing pads 4, each of which is arranged at the connection between the rotary kiln cylinder 1 and the kiln cover 3. A second sealing pad 5 is arranged at the connection between every two first sealing pads 4. Two steel hoop rings 2 are arranged outside the second sealing pad 5, one of which is located outside the rotary kiln cylinder 1 and the other of which is located outside the kiln cover 3. One end of the rotary kiln cylinder 1 abuts against the surface of the third sealing pad 7. Each of the first sealing pads 4 abuts against the surface of the rotary kiln cylinder 1 and the kiln cover 3. The plurality of first sealing pads 4 are arranged at the connection between the rotary kiln cylinder 1 and the kiln cover 3, thereby playing a further sealing role and preventing internal gas from leaking out, so as to ensure the stability of the sealing. The second sealing pad 5 is arranged at the connection between every two first sealing pads 4, thereby being capable of filling the gap between the sealing pads, enhancing the sealing effect, and preventing gas or dust from leaking from the joint between the sealing pads. The two steel hoop rings 2 are arranged outside the second sealing pad 5, one of which is located outside the rotary kiln cylinder 1 and the other of which is located outside the kiln cover 3. The steel hoop rings 2 serve to press and fix the sealing pads, thereby ensuring that the sealing pads are tightly attached to the rotary kiln cylinder 1 and the kiln cover 3 and preventing the sealing from loosening due to the movement of the kiln body. One end of the rotary kiln cylinder 1 abuts against the surface of the third sealing pad 7, thereby enabling the third sealing pad 7 to be tightly matched with the rotary kiln cylinder 1 and forming an additional sealing barrier, so as to further reduce the risk of leakage. Each of the first sealing pads 4 abuts against the surface of the rotary kiln cylinder 1 and the kiln cover 3, thereby ensuring that the sealing structure can always maintain good sealing performance during the rotation of the kiln body and improving the reliability and durability of the sealing.

[0039] With reference to Figure 2 , Figure 4 , Figure 5 and Figure 6 , the connecting assembly comprises a plurality of circular columns 12, each of which is fixedly connected to one side of the third sealing pad 7 close to the mounting plate 8. A rubber ring 11 is fixedly connected to the outside of each of the circular columns 12. A plurality of mounting holes 10 are formed in the outside of the mounting plate 8, each of which is internally provided with a groove 13. Each of the circular columns 12 corresponds to one of the mounting holes 10, and the rubber ring 11 is clamped in the groove 13. The circular column 12 serves to bear the rubber ring 11. When the third sealing pad 7 is installed, the circular column 12 is inserted into the mounting hole 10, so that the rubber ring 11 is in interference fit with the groove 13, thereby facilitating the installation or replacement of the third sealing pad 7 and effectively improving the work efficiency.

[0040] With reference to Figure 1 , Figure 2 and Figure 7The most internal part of the rotary kiln cylinder 1 is provided with a high-temperature-resistant soft sealing material 14, the outer side of the high-temperature-resistant soft sealing material 14 is provided with a graphite sealing layer 17, the outer side of the graphite sealing layer 17 is provided with a ceramic sealing sleeve layer 16, and the outer side of the ceramic sealing sleeve layer 16 is provided with a wear-resistant metal layer 15. The most internal part of the rotary kiln cylinder 1 is provided with a high-temperature-resistant soft sealing material 14, which has good elasticity and high-temperature-resistant characteristics, can adapt to the high-temperature gas flow changes in the rotary kiln, effectively block the leakage of gas and dust, and provide basic sealing function. The outer side of the high-temperature-resistant soft sealing material 14 is provided with a graphite sealing layer 17, which has excellent high-temperature resistance and oxidation resistance, can remain stable in a high-temperature environment, and enhances the sealing effect to prevent gas leakage. The outer side of the graphite sealing layer 17 is provided with a ceramic sealing sleeve layer 16, which has extremely strong high-temperature resistance, corrosion resistance and wear resistance, can effectively resist the erosion of high-temperature gas, and at the same time enhances the strength and durability of the sealing layer, and improves the stability of the overall sealing structure. The outer side of the ceramic sealing sleeve layer 16 is provided with a wear-resistant metal layer 15 made of high-strength metal material, which can provide additional mechanical protection to prevent damage to the sealing layer from the external environment, and at the same time enhance the impact resistance and service life of the overall structure.

[0041] Working principle: when using the rotary kiln, first, the fixed plate 6 on the outer side of the kiln cover 3 is stably installed at the opening of the rotary kiln cylinder 1 through bolts, at this time, under the elastic action of the spring 9, the third sealing gasket 7 will tightly fit the rotary kiln cylinder 1, ensuring good sealing effect. Then, the first sealing gasket 4 is installed in turn at the connection between the rotary kiln cylinder 1 and the kiln cover 3, so as to cover the connection area comprehensively and enhance the sealing performance. Subsequently, the second sealing gasket 5 is installed at the connection gap between every two first sealing gaskets 4 to effectively fill the gap and further prevent gas and dust leakage. Finally, two steel hoops 2 are used for fixation, one of which is used to firmly fix the first sealing gasket 4 and the second sealing gasket 5 on the rotary kiln cylinder 1, and the other is used to fix the first sealing gasket 4 and the second sealing gasket 5 on the kiln cover 3, so that the entire sealing structure is more stable and tightly fitted, thereby completing the sealing work of the rotary kiln. During long-term operation, when the third sealing gasket 7 needs to be replaced due to wear, it can be easily removed from the mounting plate 8, and the circular column 12 on the new third sealing gasket 7 is inserted into the mounting hole 10 in turn, so that the rubber ring 11 is embedded in the groove 13 and forms an interference fit, thereby ensuring the stable installation of the new sealing gasket. Thus, the replacement work of the third sealing gasket 7 is successfully completed, ensuring the continuous and efficient operation of the rotary kiln sealing effect.

[0042] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A rotary kiln sealing structure with better sealing effect, comprising a rotary kiln cylinder (1) and a kiln cover (3), characterized in that: The kiln cover (3) is fixedly connected with a plurality of fixed plates (6) outside, the fixed plate (6) is fixedly connected outside the rotary kiln cylinder (1) through a bolt, the kiln cover (3) is internally provided with a first sealing mechanism, and the rotary kiln cylinder (1) is externally provided with a second sealing mechanism. The first sealing mechanism comprises a mounting plate (8) and a third sealing gasket (7), the mounting plate (8) is slidably connected inside the kiln cover (3), a plurality of springs (9) are arranged inside the kiln cover (3), the third sealing gasket (7) is arranged outside the mounting plate (8), and a connecting assembly is arranged between the third sealing gasket (7) and the mounting plate (8).

2. The rotary kiln seal structure with better sealing effect according to claim 1, characterized in that: The second sealing mechanism comprises a plurality of first sealing gaskets (4), a plurality of first sealing gaskets (4) are arranged at the connecting position of the rotary kiln cylinder (1) and the kiln cover (3), a second sealing gasket (5) is arranged at the connecting position of every two first sealing gaskets (4), and two steel hoop rings (2) are arranged outside the second sealing gasket (5), one of which is located outside the rotary kiln cylinder (1) and the other of which is located outside the kiln cover (3).

3. The rotary kiln seal structure with better sealing effect according to claim 1, characterized in that: The connecting assembly comprises a plurality of circular columns (12), a plurality of circular columns (12) are fixedly connected to one side of the third sealing gasket (7) close to the mounting plate (8), a rubber ring (11) is fixedly connected to the outside of the circular column (12), a plurality of mounting holes (10) are formed in the outside of the mounting plate (8), and a groove (13) is formed in the inside of the mounting hole (10).

4. The rotary kiln seal structure with better sealing effect according to claim 1, characterized in that: The rotary kiln cylinder (1) is internally provided with a high-temperature-resistant soft sealing material (14), and the high-temperature-resistant soft sealing material (14) is externally provided with a graphite sealing layer (17).

5. The rotary kiln seal structure with better sealing effect according to claim 4, characterized in that: The graphite sealing layer (17) is externally provided with a ceramic sealing sleeve layer (16), and the ceramic sealing sleeve layer (16) is externally provided with a wear-resistant metal layer (15).

6. The rotary kiln seal structure with better sealing effect according to claim 2, characterized in that: One end of the rotary kiln cylinder (1) abuts against the surface of the third sealing gasket (7), and the first sealing gasket (4) abuts against the surfaces of the rotary kiln cylinder (1) and the kiln cover (3).

7. The rotary kiln seal structure with better sealing effect according to claim 1, characterized in that: One end of the spring (9) is fixedly connected to the inner wall of the kiln cover (3), and the other end of the spring (9) is fixedly connected to one side of the mounting plate (8) away from the third sealing gasket (7).

8. The rotary kiln seal structure with better sealing effect according to claim 3, characterized in that: The plurality of circular columns (12) correspond to the plurality of mounting holes (10) one by one, and the rubber ring (11) is clamped in the groove (13).

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