Kiln tail sealing device of rotary cement kiln

Abstract

The utility model discloses a rotary cement kiln tail sealing device, which relates to the technical field of rotary kilns, and comprises a kiln body tail pipe, a smoke pipe, a screw cap, an elastic sealing assembly, a second friction sealing ring and a third friction sealing ring, the inner diameter of the smoke pipe is larger than the outer diameter of the kiln body tail pipe, and the kiln body tail pipe is inserted into the smoke pipe. A fixing ring is arranged on the end face of the kiln body tail pipe, an extension ring is arranged at one end of the outer side of the fixing ring, the elastic sealing assembly is arranged on the end face of the extension ring, and the elastic sealing assembly can seal the portion between the end face of the kiln body tail pipe and the inner side wall of the smoke pipe. By means of the elastic sealing assembly arranged on the kiln body tail pipe, the second friction sealing ring arranged between the outer side wall of the kiln body tail pipe and the inner side wall of the smoke pipe and the third friction sealing ring arranged between the front end of the smoke pipe and the outer side wall of the kiln body tail pipe, the sealing effect is greatly improved through three seals, the structure is simple, and replacement is convenient.

Description

Technical Field

[0001] This utility model relates to the field of rotary kiln technology, specifically to a sealing device for the kiln tail of a cement rotary kiln. Background Technology

[0002] Cement rotary kilns are the main equipment in dry and wet cement clinker production lines. They are widely used in metallurgy, chemical industry, building refractory materials, environmental protection, and other industries.

[0003] A sealing device is installed between the tail end of the rotary kiln body and the flue pipe to prevent flue gas leakage. For example, patent CN204329587U describes a sealing device for the tail end of a cement rotary kiln, including a flue chamber and a kiln body, as well as a sealing body. A sealing ring is welded to the tail end of the flue chamber, and a friction ring is installed on the kiln body… However, this patent uses a single friction sealing ring for sealing, resulting in poor sealing performance; the sealing structure needs further optimization. Utility Model Content

[0004] To address the aforementioned shortcomings of existing technologies, this utility model provides a sealing device for the tail of a cement rotary kiln. The device employs an elastic sealing component installed on the kiln tail pipe for the first sealing, a second friction sealing ring between the outer wall of the kiln tail pipe and the inner wall of the flue pipe for the second sealing, and a third friction sealing ring between the front end of the flue pipe and the outer wall of the kiln tail pipe for the third sealing. This triple sealing significantly improves the sealing effect, and the device has a simple structure that is easy to replace.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sealing device for the tail of a cement rotary kiln, comprising a kiln tail pipe, a flue pipe, a cap, an elastic sealing component, a second friction sealing ring, and a third friction sealing ring. The inner diameter of the flue pipe is larger than the outer diameter of the kiln tail pipe, and the kiln tail pipe is inserted into the flue pipe. A fixing ring is provided on the end face of the kiln tail pipe, and an extension ring is provided on one outer end of the fixing ring. The elastic sealing component is located on the end face of the extension ring and can seal the end face of the kiln tail pipe and the inner wall of the flue pipe. A second annular groove is provided on the outer wall of the kiln tail pipe, and a first annular groove is provided on the inner wall of the flue pipe, with the first annular groove corresponding to the second annular groove. The second friction sealing ring is located between the first and second annular grooves. An opening is provided in the center of the cap, through which the kiln tail pipe passes. The cap is connected to the outer wall of the flue pipe. The third friction sealing ring is located between the end face of the flue pipe, the end face of the cap, and the outer wall of the kiln tail pipe.

[0006] Preferably, the elastic sealing assembly includes a first friction sealing ring and multiple compression springs. One end of each compression spring is fixedly connected to the side wall of the outer ring, and the other end is connected to the first friction sealing ring. The compression springs can push the first friction sealing ring between the end face of the kiln tail pipe and the inner side wall of the flue pipe, and the compression springs can accommodate a certain degree of bending.

[0007] Preferably, the outer edge of the tailpipe end face of the kiln body is provided with a first chamfer, and the first friction sealing ring can contact the surface of the first chamfer.

[0008] Preferably, the inner edge of the end face of the flue pipe is provided with a second chamfer, and the third friction sealing ring can contact the surface of the second chamfer.

[0009] Preferably, the screw cap is connected to the outer wall of the flue via a thread.

[0010] This utility model provides a sealing device for the kiln tail of a cement rotary kiln, which has the following beneficial effects:

[0011] 1. This utility model provides a first seal through an elastic sealing component installed on the tail pipe of the kiln body, a second seal through a second friction sealing ring between the outer wall of the tail pipe and the inner wall of the flue, and a third seal through a third friction sealing ring between the front end of the flue and the outer wall of the tail pipe. The three seals greatly improve the sealing effect, and the structure is simple and easy to replace.

[0012] 2. The elastic sealing component of this utility model includes a first friction sealing ring with a compression spring. The elastic force of the compression spring pushes the first friction sealing ring to be squeezed between the flue and the tail pipe of the kiln body, which has a simple structure. Attached Figure Description

[0013] Figure 1 This is a front sectional view of a sealing device for the kiln tail of a cement rotary kiln according to the present invention.

[0014] In the diagram: 1. Fixing ring; 2. Compression spring; 3. First chamfer; 4. Kiln tailpipe; 5. First annular groove; 6. Thread; 7. Second chamfer; 8. Screw cap; 9. Through port; 10. Third friction seal ring; 11. Second annular groove; 12. Second friction seal ring; 13. Smoke pipe; 14. First friction seal ring; 15. Outer ring. Detailed Implementation

[0015] 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.

[0016] like Figure 1As shown, a sealing device for the tail of a cement rotary kiln includes a kiln tail pipe 4, a flue pipe 13, a cap 8, an elastic sealing component, a second friction sealing ring 12, and a third friction sealing ring 10. The inner diameter of the flue pipe 13 is larger than the outer diameter of the kiln tail pipe 4, and the kiln tail pipe 4 is inserted into the flue pipe 13. A fixing ring 1 is provided on the end face of the kiln tail pipe 4, and an extension ring 15 is provided on one outer end of the fixing ring 1. The elastic sealing component is provided on the end face of the extension ring 15, and the elastic sealing component can seal the end face of the kiln tail pipe 4 and the inner wall of the flue pipe 13. A second annular groove 11 is provided on the outer wall of the kiln tail pipe 4, and a first annular groove 5 is provided on the inner wall of the flue pipe 13, with the first annular groove 5 corresponding to the second annular groove 11. The second friction sealing ring 12 is located between the first annular groove 5 and the second annular groove 11. A through-hole 9 is opened in the center of the cap 8, through which the kiln tail pipe 4 passes. The cap 8 is connected to the outer wall of the flue pipe 13. The third friction sealing ring 10 is disposed between the end face of the flue pipe 13, the end face of the cap 8, and the outer wall of the kiln tail pipe 4. The elastic sealing assembly includes a first friction sealing ring 14 and multiple compression springs 2. One end of the multiple compression springs 2 is fixedly connected to the side wall of the outer ring 15, and the other end is connected to the first friction sealing ring 14. The compression springs 2 can push the first friction sealing ring 14 between the end face of the kiln tail pipe 4 and the inner wall of the flue pipe 13. The compression springs 2 can satisfy a certain degree of bending. The outer edge of the end face of the kiln tail pipe 4 is provided with a first chamfer 3, and the first friction sealing ring 14 can contact the surface of the first chamfer 3. The inner edge of the end face of the flue pipe 13 is provided with a second chamfer 7, and the third friction sealing ring 10 can contact the surface of the second chamfer 7. The cap 8 is connected to the outer wall of the flue pipe 13 by a thread 6.

[0017] Its detailed connection methods are well-known technologies in this field. The following mainly introduces the working principle and process, as follows:

[0018] According to the instruction manual Figure 1It is understood that during installation of this utility model, since the inner diameter of the flue pipe 13 is larger than the outer diameter of the kiln tail pipe 4, the kiln tail pipe 4 is inserted into the flue pipe 13. During insertion, a second friction sealing ring 12 is placed in the second annular groove 11 of the kiln tail pipe 4. This ring has a certain elasticity and can be compressed until the second annular groove 11 is simultaneously inserted into the flue pipe 13, stopping at the position of the first annular groove 5 on the inner side wall of the flue pipe 13. The insertion depth allows control of the corresponding positions of the first annular groove 5 and the second annular groove 11. The second friction sealing ring 12 serves as... The second seal: A fixing ring 1 and an outer extension ring 15 are provided on the end face of the kiln tail pipe 4. An elastic sealing component is provided on the end face of the outer extension ring 15, and the elastic sealing component can seal the end face of the kiln tail pipe 4 and the inner wall of the flue pipe 13, serving as the first seal. The screw cap 8 is fitted onto the kiln tail pipe 4 through the through-hole 9 and connected to the outer wall of the flue pipe 13. The third friction sealing ring 10 is provided between the end face of the flue pipe 13, the end face of the screw cap 8, and the outer wall of the kiln tail pipe 4, serving as the third seal. The first seal is provided by the elastic sealing component provided on the kiln tail pipe 4, the second seal is provided by the second friction sealing ring 12 between the outer wall of the kiln tail pipe 4 and the inner wall of the flue pipe 13, and the third seal is provided by the third friction sealing ring 10 between the front end of the flue pipe 13 and the outer wall of the kiln tail pipe 4. The three seals greatly improve the sealing effect and have a simple structure that is easy to replace.

[0019] The elastic sealing assembly includes a first friction sealing ring 14 and multiple compression springs 2. One end of each compression spring 2 is fixedly connected to the side wall of the outer ring 15, and the other end is connected to the first friction sealing ring 14. The compression springs 2 can push the first friction sealing ring 14 between the end face of the kiln tail pipe 4 and the inner wall of the smoke pipe 13 to achieve a seal and improve the sealing effect. Since the rotation of the kiln tail pipe 4 generates a circumferential force on the first friction sealing ring 14, the compression springs 2 can bend to a certain extent to ensure its normal use. In addition, a first chamfer 3 is provided on the outer edge of the end face of the kiln tail pipe 4. The first friction sealing ring 14 can contact the surface of the first chamfer 3. The inclination of the first chamfer 3, combined with the pressure of the compression springs 2, can make the first friction sealing ring 14 more tightly sealed to the inner wall of the smoke pipe 13, thus improving the sealing effect.

[0020] The inner edge of the end face of the flue pipe 13 is provided with a second chamfer 7, and the third friction sealing ring 10 can contact the surface of the second chamfer 7. The inclination of the second chamfer 7, combined with the pressure of the screw cap 8, can make the third friction sealing ring 10 more tightly sealed with the outer wall of the kiln tail pipe 4, thereby improving the sealing effect.

[0021] The screw cap 8 is connected to the outer wall of the flue 13 by a thread 6, and the edge is pressed against the third friction seal ring 10.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealing device for the tail of a cement rotary kiln, characterized in that, The system includes a kiln tailpipe (4), a flue (13), a cap (8), an elastic sealing assembly, a second friction sealing ring (12), and a third friction sealing ring (10). The inner diameter of the flue (13) is larger than the outer diameter of the kiln tailpipe (4), and the kiln tailpipe (4) is inserted into the flue (13). A fixing ring (1) is provided on the end face of the kiln tailpipe (4), and an extension ring (15) is provided on one outer end of the fixing ring (1). The elastic sealing assembly is provided on the end face of the extension ring (15), and the elastic sealing assembly can seal the end face of the kiln tailpipe (4) and the inner wall of the flue (13). The outer wall of the kiln tail pipe (4) is provided with a second annular groove (11), the inner wall of the flue pipe (13) is provided with a first annular groove (5), and the first annular groove (5) corresponds to the second annular groove (11). The second friction sealing ring (12) is located between the first annular groove (5) and the second annular groove (11). The center of the cap (8) is provided with a through-hole (9), the kiln tail pipe (4) passes through the through-hole (9), the cap (8) is connected to the outer wall of the flue pipe (13), and the third friction sealing ring (10) is located between the end face of the flue pipe (13), the end face of the cap (8), and the outer wall of the kiln tail pipe (4).

2. The sealing device for the kiln tail of a cement rotary kiln according to claim 1, characterized in that, The elastic sealing assembly includes a first friction sealing ring (14) and multiple compression springs (2). One end of each compression spring (2) is fixedly connected to the side wall of the outer ring (15), and the other end is connected to the first friction sealing ring (14). The compression spring (2) can push the first friction sealing ring (14) between the end face of the kiln tail pipe (4) and the inner side wall of the smoke pipe (13). The compression spring (2) can satisfy a certain degree of bending.

3. The sealing device for the kiln tail of a cement rotary kiln according to claim 2, characterized in that, The outer edge of the end face of the kiln tail pipe (4) is provided with a first chamfer (3), and the first friction sealing ring (14) can contact the surface of the first chamfer (3).

4. The sealing device for the kiln tail of a cement rotary kiln according to claim 1, characterized in that, The inner edge of the end face of the flue (13) is provided with a second chamfer (7), and the third friction sealing ring (10) can contact the surface of the second chamfer (7).

5. The sealing device for the kiln tail of a cement rotary kiln according to claim 1, characterized in that, The screw cap (8) is connected to the outer wall of the flue (13) by a thread (6).

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