A rotary kiln sealing device

Abstract

The utility model discloses a rotary kiln sealing device belongs to rotary kiln sealing technical field, the utility model discloses a heat -proof sleeve and sealing mechanism, wherein, the heat -proof sleeve sleeve sets on the central cylinder, and with the outer peripheral wall of central cylinder forms a annular heat -proof space, the heat -proof space is filled with heat -proof material, sealing mechanism whole sleeve sets on the heat -proof sleeve, and it includes the limit ring and gland that are connected with each other, the limit ring and gland enclose an annular mounting space, the mounting space is equipped with the sealing element, and the sealing element and the outer peripheral wall of heat -proof sleeve mutually adhere. The utility model fills with heat -proof material in the heat -proof space, can effectively cut the high temperature of central cylinder place to the radiation of sealing element, makes the temperature reduction at sealing element place to can effectively prolong the service life of sealing element, guarantees the stability of sealing performance.

Description

Technical Field

[0001] This utility model belongs to the field of rotary kiln sealing technology, and more specifically, relates to a rotary kiln sealing device. Background Technology

[0002] In the production of lithium-ion battery graphite anode materials, the materials need to be granulated or carbonized in a protective gas atmosphere. If the seal leaks, outside air is drawn into the rotary kiln, causing volatiles to carry the material out. This can also cause volatiles or even the material to burn inside or outside the kiln, leading to a significant decrease in product yield and quality. Therefore, the sealing device connecting the high-temperature rotating cylinder of the rotary kiln to the fixed kiln tail hood must ensure continuous sealing performance between the outer surface of the kiln cylinder and the sealing contact surface, and must operate normally under certain high-temperature conditions. However, in actual operation, the high kiln temperature accelerates the wear and tear of the seals, thus affecting the final sealing effect.

[0003] A search revealed that patent CN211060627U discloses a rotary kiln and its double-layer elastic sealing device. This application includes two cylinders, with a connecting cover fitted at the junction of the two cylinders. Both ends of the connecting cover are provided with elastic sealing mechanisms. The elastic sealing mechanism includes an annular cone and a sealing component. The larger diameter end of the annular cone is connected to the connecting cover via a transition flange, and the other end is connected to the sealing component via bolts. The end of the sealing component away from the annular cone abuts against the outer wall of the cylinder. A pressing mechanism is provided on the outside of the sealing component. The sealing component includes an inner elastic sealing sheet arranged in a fish-scale pattern along the circumference of the cylinder, and an outer elastic sealing sheet arranged in a fish-scale pattern along the circumference of the cylinder on the outside of the inner elastic sealing sheet. A heat insulation plate is provided between the inner and outer elastic sealing sheets.

[0004] This application achieves a double-layer seal through the combination of an inner elastic sealing sheet, a heat insulation plate, and an outer elastic sealing sheet. The inner elastic sealing sheet incorporates wear-resistant small pieces, increasing the wear resistance of the sealing component and extending its service life. Simultaneously, the clamping mechanism uses double-loop steel wire rope winding, which, combined with the double-layer seal, ensures that even if the cylinder deforms, the sealing component remains pressed tightly against the outer surface of the cylinder, achieving a good sealing effect. However, the industry still needs more diverse and sophisticated designs to address the problem of sealing device failure due to high temperatures. Utility Model Content

[0005] 1. The problem to be solved

[0006] In view of at least some of the problems existing in the prior art, this utility model proposes a rotary kiln sealing device, the purpose of which is to solve the problem that the sealing components of the existing rotary kiln sealing devices are easily affected by high temperature and thus wear out faster.

[0007] 2. Technical Solution

[0008] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0009] This utility model discloses a rotary kiln sealing device, which is installed at the connection between the central cylinder and the sealing tail cover. The sealing device includes a heat-insulating sleeve.

[0010] The heat insulation sleeve is fitted onto the central cylinder, and forms an annular heat insulation space between it and the outer peripheral wall of the central cylinder. The heat insulation space is filled with heat insulation material.

[0011] And the sealing mechanism connected to the sealing tail cover,

[0012] The sealing mechanism is integrally fitted onto the heat insulation sleeve, and includes a limiting ring and a pressure cap that are connected to each other; wherein, the limiting ring and the pressure cap form an annular installation space, and a sealing element is provided in the installation space, and the sealing element is in contact with the outer peripheral wall of the heat insulation sleeve.

[0013] In some embodiments, the heat insulation sleeve is provided with a first connecting ring at one end near the sealing tail cover, which is used to connect with the central cylinder.

[0014] In some embodiments, the end of the heat insulation sleeve away from the sealing tail cover is provided with a second connecting ring, and the heat insulation material is confined between the second connecting ring and the first connecting ring.

[0015] In some embodiments, the seal includes a first sealing body and a second sealing body disposed inside and outside each other; wherein the elasticity of the second sealing body is greater than that of the first sealing body, and it is used to elastically compress the first sealing body.

[0016] In some embodiments, the first sealing body is asbestos packing, and the second sealing body is rubber core packing.

[0017] In some embodiments, an expansion joint is provided between the sealing tail cover and the sealing mechanism.

[0018] In some embodiments, the limiting ring and the pressure cap are connected by bolts; the expansion joint is welded to the sealing tail cover and the limiting ring.

[0019] In some embodiments, the heat insulation material is a high-alumina fiber product.

[0020] 3. Beneficial effects

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] (1) A rotary kiln sealing device of the present invention can form a heat insulation space between the sealing mechanism and the central cylinder by setting a heat insulation sleeve; by filling the heat insulation space with heat insulation material, the temperature at the sealing element is reduced, which can effectively prevent the high temperature from affecting the service life of the sealing element, so as to ensure the stability of the sealing performance.

[0023] (2) A rotary kiln sealing device of the present invention has a first connecting ring at one end of the heat insulation sleeve near the sealing tail cover. The first connecting ring serves to connect the heat insulation sleeve and the central cylinder on the one hand; on the other hand, it can seal the end of the heat insulation space located inside the sealing tail cover to prevent leakage.

[0024] (3) In a rotary kiln sealing device of the present invention, the elasticity of the second sealing body is greater than that of the first sealing body, and it can be used to radially compress the first sealing body to ensure that the first sealing body can always be in close contact with the central cylinder when the central cylinder is heated and expanded or the first sealing body is worn, so as to ensure the sealing effect.

[0025] (4) The rotary kiln sealing device of this utility model can effectively reduce the adverse effects on sealing performance caused by the vibration of the central cylinder by setting the expansion joint vibration reduction. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a rotary kiln sealing device according to the present invention;

[0027] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0028] In the diagram: 100, center cylinder; 200, sealing tail cover;

[0029] 300. Insulating sleeve; 310. First connecting ring; 320. Second connecting ring;

[0030] 400. Sealing mechanism; 410. Limiting ring; 420. Gland; 430. Sealing element; 431. First sealing body; 432. Second sealing body;

[0031] 500, thermal insulation material; 600, expansion joint. Detailed Implementation

[0032] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0033] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] The present invention will be further described below with reference to specific embodiments.

[0035] like Figure 1 , Figure 2 As shown, a rotary kiln sealing device of this embodiment is disposed between the central cylinder 100 and the sealing tail cover 200, and is used to seal the connection between the two.

[0036] Specifically, the sealing device includes a heat-insulating sleeve 300 and a sealing mechanism 400. The heat-insulating sleeve 300 is fitted onto the central cylinder 100, forming an annular heat-insulating space between itself and the outer peripheral wall of the central cylinder 100. This heat-insulating space is filled with heat-insulating material 500. The heat-insulating material 500 is existing technology, such as high-alumina fiber products, and is not specifically limited here.

[0037] The sealing mechanism 400 is integrally fitted onto the heat insulation sleeve 300, and is also connected to the sealing tail cover 200. The sealing mechanism 400 includes a limiting ring 410 and a pressure cap 420 connected to each other; wherein the limiting ring 410 and the pressure cap 420 form an annular mounting space, within which a sealing element 430 is provided. The sealing element 430 is in contact with the outer peripheral wall of the heat insulation sleeve 300, providing a dynamic seal to the outer peripheral wall of the heat insulation sleeve 300.

[0038] In this embodiment of the rotary kiln sealing device, the heat insulation sleeve 300 ensures that there is no direct contact between the central cylinder 100 and the sealing element 430, but rather a heat insulation layer is formed between them. Utilizing the heat insulation effect of this layer, the high temperature radiated from the central cylinder 100 to the sealing element 430 can be effectively reduced, thus lowering the temperature of the sealing element 430 and effectively extending its service life to ensure the stability of its sealing performance.

[0039] In some embodiments, the heat insulation sleeve 300 is provided with a first connecting ring 310 at one end near the sealing tail cover 200. The first connecting ring 310 serves two purposes: firstly, it connects the central cylinder 100; secondly, it seals the end of the heat insulation space located inside the sealing tail cover 200 to prevent leakage.

[0040] In other embodiments, a second connecting ring 320 is provided at the end of the heat insulation sleeve 300 away from the sealing tail cover 200. The second connecting ring 320 is provided for connecting with the central cylinder 100 to improve the connection strength between the two; on the other hand, a limiting space can be formed between the second connecting ring 320 and the first connecting ring 310 to limit the heat insulation material 500 inside.

[0041] As a specific embodiment of the sealing element 430 in this embodiment, the sealing element 430 includes a first sealing body 431 and a second sealing body 432 disposed inner and outer respectively. The second sealing body 432, located on the outer side, has greater elasticity than the first sealing body 431. Preferably, the first sealing body 431 is asbestos packing, and the second sealing body 432 is rubber core packing.

[0042] In this embodiment, the elasticity of the second sealing body 432 is greater than that of the first sealing body 431, and it can be used to radially compress the first sealing body 431 to ensure that the first sealing body 431 can always be in close contact with the central cylinder 100 when the central cylinder 100 is heated and expanded or when the first sealing body 431 is worn, so as to ensure the sealing effect.

[0043] In some embodiments, an expansion joint 600 is provided between the sealing tail cover 200 and the sealing mechanism 400 to reduce the adverse effects on sealing performance caused by vibration of the central cylinder 100. The expansion joint 600, the sealing tail cover 200, and the limiting ring 410 can be connected by welding, bolts, or other existing sealing methods, and no specific limitation is made here.

[0044] This embodiment of a rotary kiln sealing device is mainly applied to externally heated rotary kilns, in scenarios where the temperature is high and the sealing performance is critical, or where the material needs to be heated in a protective gas environment. In this embodiment, the use of insulation material 500 and expansion joint 600 improves the high-temperature resistance and vibration resistance of the sealing device, thus ensuring the sealing performance of the rotary kiln.

[0045] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A rotary kiln sealing device, disposed at the connection between the central cylinder (100) and the sealing tail cover (200), characterized in that: The sealing device includes a heat-insulating sleeve (300). The heat insulation sleeve (300) is fitted on the central cylinder (100) and forms an annular heat insulation space between itself and the outer peripheral wall of the central cylinder (100). The heat insulation space is filled with heat insulation material (500). and a sealing mechanism (400) connected to the sealing tail cover (200), The sealing mechanism (400) is integrally sleeved on the heat insulation sleeve (300), and includes a limiting ring (410) and a pressure cap (420) connected to each other; wherein, the limiting ring (410) and the pressure cap (420) form an annular installation space, and a sealing element (430) is provided in the installation space, and the sealing element (430) is in contact with the outer peripheral wall of the heat insulation sleeve (300).

2. The rotary kiln sealing device according to claim 1, characterized in that: The heat insulation sleeve (300) is provided with a first connecting ring (310) at one end near the sealing tail cover (200), which is used to connect with the central cylinder (100).

3. The rotary kiln sealing device according to claim 2, characterized in that: The heat insulation sleeve (300) is provided with a second connecting ring (320) at one end away from the sealing tail cover (200), and the heat insulation material (500) is confined between the second connecting ring (320) and the first connecting ring (310).

4. A rotary kiln sealing device according to any one of claims 1-3, characterized in that: The sealing element (430) includes a first sealing body (431) and a second sealing body (432) arranged in an inner and outer manner; wherein, the second sealing body (432) has greater elasticity than the first sealing body (431) and is used to elastically compress the first sealing body (431).

5. A rotary kiln sealing device according to claim 4, characterized in that: The first sealing body (431) is asbestos packing, and the second sealing body (432) is rubber core packing.

6. A rotary kiln sealing device according to claim 4, characterized in that: An expansion joint (600) is provided between the sealing tail cover (200) and the sealing mechanism (400).

7. A rotary kiln sealing device according to claim 6, characterized in that: The limiting ring (410) and the pressure cap (420) are connected by bolts; the expansion joint (600) is welded to the sealing tail cover (200) and the limiting ring (410).

8. A rotary kiln sealing device according to claim 1, characterized in that: The heat insulation material (500) is a high-alumina fiber product.

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