Wide-body ceramic inner cylinder for a preheater of a cement kiln

Abstract

The utility model relates to cement kiln equipment technical field, concretely relates to a kind of preheater wide body ceramic inner cylinder for cement kiln, including multiple annular distribution's hanging piece unit each hanging piece unit includes fixed seat and stabilizing lock piece, multiple ceramic hanging pieces connected at head and tail are installed between fixed seat and stabilizing lock piece, the connecting place of two ceramic hanging pieces connected is equipped with transverse gap, longitudinal gap is set between the two adjacent hanging piece units, stabilizing briquetting is installed at the intersection of transverse gap and longitudinal gap, the connection strength between the two adjacent hanging piece units can be strengthened by the installation of stabilizing briquetting, avoid the phenomenon that the two adjacent hanging piece units appear front and rear misregistration after material falling and hanging piece impact when using, to reach the purpose that the overall inner cylinder structure stability is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of cement kiln equipment, specifically to a wide-body ceramic inner cylinder for a cement kiln preheater. Background Technology

[0002] As the cement industry develops towards larger scale and higher efficiency, the specifications of preheaters are constantly expanding. Wide-body ceramic inner cylinders, with their excellent high-temperature resistance, good wear and corrosion resistance, and low thermal conductivity, can effectively reduce heat loss within the preheater and improve heat exchange efficiency. They have gradually replaced traditional metal inner cylinders and are widely used in large cement kiln preheaters. Currently, wide-body ceramic inner cylinders on the market typically adopt a structure of multiple ceramic hanging unit splicing and assembly. These hanging units are sequentially connected and fixed to the preheater's cylinder wall or support frame to form a complete inner cylinder cavity. This splicing structure not only facilitates the manufacturing, transportation, and installation of the inner cylinder but also allows for individual replacement of damaged hanging units, reducing maintenance costs. Therefore, it has become the mainstream structural design scheme for wide-body ceramic inner cylinders.

[0003] In practical applications, the existing connection structure of the hanging unit in the wide-body ceramic inner cylinder still has significant technical defects, seriously affecting the overall structural stability and service life of the inner cylinder. Specifically, the current hanging units are mainly connected by simple overlapping, snap-fit, or preliminary bolt fixing. This connection method has low strength and cannot effectively resist the impact load generated during the falling raw material. During normal operation of the cement kiln, a large amount of high-temperature raw material falls continuously from the feed pipe at the top of the preheater, which will frequently and strongly impact the inner wall of the ceramic hanging unit in the inner cylinder. Due to the lack of a stable and reliable reinforced connection structure between adjacent hanging units, under the continuous impact of material, adjacent hanging units are prone to relative displacement, especially misalignment in the front-to-back direction.

[0004] Misalignment can cause the originally tight joints between the clip units to widen. High-temperature hot air and insufficiently preheated raw material particles may seep into the interlayer space between the inner cylinder and the preheater shell through these gaps. This not only wastes heat and reduces heat exchange efficiency, but also disrupts the overall flatness of the inner cylinder wall. Subsequent falling materials will accumulate at the misalignment points, further aggravating the impact and wear, creating a vicious cycle and accelerating the damage to the clip units. Finally, long-term misalignment and deformation can significantly reduce the structural stability of the entire inner cylinder, potentially causing the clip units to detach and forcing the cement kiln production line to shut down for maintenance. This not only increases maintenance costs but also seriously affects the continuity of production. Utility Model Content

[0005] To address the aforementioned issues, this utility model provides a wide-body ceramic inner cylinder for a cement kiln preheater. By utilizing a stabilizing pressure block, the connection strength between two adjacent hanging plate units can be enhanced, preventing misalignment of adjacent hanging plate units due to material falling and impacting the hanging plates during use. This, in turn, achieves the goal of improving the overall stability of the inner cylinder structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a wide-body ceramic inner cylinder for a cement kiln preheater, comprising multiple annularly distributed hanging plate units. Each hanging plate unit includes a fixed seat and a stabilizing locking plate. Multiple ceramic hanging plates connected end-to-end are provided between the fixed seat and the stabilizing locking plate. A transverse gap is provided at the connection point of two connected ceramic hanging plates, and a longitudinal gap is provided between two adjacent hanging plate units. A stabilizing pressure block is provided at the intersection of the transverse gap and the longitudinal gap.

[0007] As a further improvement to the above technical solution:

[0008] The stabilizing block includes a base plate, and a plug-in block for use with a lateral gap is provided in the middle of the base plate.

[0009] The cross-section of the plug block is trapezoidal, and its width gradually increases downward from the end connected to the substrate.

[0010] The lower surface of the substrate is provided with a snap-fit ​​protrusion corresponding to the longitudinal gap position. Both ends of the snap-fit ​​protrusion are provided with extension plates, and the thickness of the extension plates gradually decreases from the end connected to the snap-fit ​​protrusion outward.

[0011] The ceramic hanging piece includes a connecting part and a hanging part. The connecting part is provided with a pin hole, and the inner side wall of the hanging part is provided with a locking pin.

[0012] A snap-fit ​​protrusion is provided between the connecting part and the hanging part.

[0013] The cross-section of the locking pin is a right-angled trapezoid, with the right-angled side located at the top.

[0014] The number of locking pins is multiple, and the number and position of the pin holes correspond to the locking pins.

[0015] The beneficial effects of this utility model embodiment are as follows: The wide-body ceramic inner cylinder of the cement kiln preheater includes multiple annularly distributed hanging plate units. Each hanging plate unit includes a fixed seat and a stabilizing locking plate. Multiple ceramic hanging plates connected end to end are installed between the fixed seat and the stabilizing locking plate. A transverse gap is provided at the connection between two connected ceramic hanging plates. A longitudinal gap is provided between two adjacent hanging plate units. A stabilizing pressure block is installed at the intersection of the transverse gap and the longitudinal gap. The installation of the stabilizing pressure block can strengthen the connection strength between two adjacent hanging plate units, and avoid the phenomenon of misalignment between two adjacent hanging plate units after the material falls and impacts the hanging plates during use, thereby achieving the purpose of improving the overall stability of the inner cylinder structure.

[0016] The ceramic hanger has an overall arc-shaped structure, including a connecting part and a hanging part. A snap-fit ​​boss is provided between the connecting part and the hanging part. The depth of the snap-fit ​​boss is the same as the thickness of the stabilizing block, ensuring that the inner wall of the inner cylinder is flat after connection. The connecting part has a pin hole for connecting the previous ceramic hanger or fixing seat. The inner wall of the hanging part has a locking pin for connecting the next ceramic hanger or stabilizing locking piece. The cross-section of the locking pin is a right-angled trapezoid, with the right angle side located at the top. This structure can increase the stability after hanging. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the hanging plate unit in this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the fixing base in this utility model;

[0020] Figure 4 This is a side view of the fixing base in this utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the ceramic hanging piece in this utility model;

[0022] Figure 6 This is a side view of the ceramic hanging piece in this utility model;

[0023] Figure 7 This is a schematic diagram of the structure of the stabilizing block in this utility model;

[0024] Figure 8 This is a side view of the stabilizing block in this utility model;

[0025] Figure 9 This is a front view of the stabilizing block in this utility model.

[0026] In the diagram: 1. Fixing base; 2. Stabilizing locking plate; 3. Ceramic hanging plate; 4. Lateral gap; 5. Longitudinal gap; 6. Stabilizing pressure block; 7. Base plate; 8. Insertion block; 9. Snap-fit ​​protrusion; 10. Extension plate; 11. Connecting part; 12. Hanging part; 13. Pin hole; 14. Locking pin; 15. Snap-fit ​​boss. Detailed Implementation

[0027] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0028] like Figure 1-9 As shown, the wide-body ceramic inner cylinder of the cement kiln preheater in this embodiment includes multiple annularly distributed hanging plate units. Each hanging plate unit includes a fixed base 1 and a stabilizing locking plate 2. Multiple ceramic hanging plates 3 connected end to end are installed between the fixed base 1 and the stabilizing locking plate 2. A transverse gap 4 is provided at the connection between two connected ceramic hanging plates 3. A longitudinal gap 5 is provided between two adjacent hanging plate units. A stabilizing pressure block 6 is installed at the intersection of the transverse gap 4 and the longitudinal gap 5.

[0029] The stabilizing block 6 includes a base plate 7. A plug-in block 8 is provided in the middle of the base plate 7 to cooperate with the transverse gap 4. The cross-section of the plug-in block 8 is trapezoidal, and the width gradually increases downward from the end connected to the base plate 7. The upper part of the transverse gap 4 is provided with limiting plates on both sides of the connection between the base plate 7 and the plug-in block 8, forming a dovetail groove that cooperates with the plug-in block 8 to increase the fixing effect of the stabilizing block 6.

[0030] The lower surface of the substrate 7 is provided with a snap-fit ​​protrusion 9 corresponding to the position of the longitudinal gap 5. Both ends of the snap-fit ​​protrusion 9 are provided with extension plates 10. The thickness of the extension plates 10 gradually decreases from the end connected to the snap-fit ​​protrusion 9 outward. The width of the snap-fit ​​protrusion 9 is the same as the width of the longitudinal gap 5, thereby compensating for the longitudinal gap. The installation of the stabilizing pressure block 6 can strengthen the connection strength between two adjacent hanging plate units, and prevent the two adjacent hanging plate units from being misaligned due to the impact of the material falling and the hanging plate during use, thereby achieving the purpose of improving the overall stability of the inner cylinder structure.

[0031] The ceramic hanging piece 3 has an overall arc-shaped structure and includes a connecting part 11 and a hanging part 12. A snap-fit ​​boss 15 is provided between the connecting part 11 and the hanging part 12. The depth of the snap-fit ​​boss 15 is the same as the thickness of the stabilizing block 6, ensuring that the inner wall of the inner cylinder is flat after connection. The connecting part 11 is provided with a pin hole 13 for connecting the previous ceramic hanging piece or fixing seat. The inner wall of the hanging part 12 is provided with a locking pin 14 for connecting the next ceramic hanging piece or stabilizing locking piece 2. The cross-section of the locking pin 14 is a right-angled trapezoid, and the right angle side is located at the top. This structure can increase the stability after hanging. There are multiple locking pins 14. The number and position of the pin holes 13 correspond to the locking pins 14. Preferably, there are three, with two at the top and one at the bottom, forming a triangular distribution, which further improves the connection stability of the hanging piece unit.

[0032] It should be noted that in the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on 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.

[0033] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0035] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A wide-body ceramic inner cylinder for a cement kiln preheater, comprising multiple annularly distributed hanging plate units, characterized in that: Each of the hanging plate units includes a fixing base (1) and a stabilizing locking plate (2), and a plurality of ceramic hanging plates (3) connected end to end are provided between the fixing base (1) and the stabilizing locking plate (2); A transverse gap (4) is provided at the connection of two connected ceramic hanging pieces (3), and a longitudinal gap (5) is provided between two adjacent hanging piece units. A stabilizing block (6) is provided at the intersection of the transverse gap (4) and the longitudinal gap (5).

2. The wide-body ceramic inner cylinder for a cement kiln preheater according to claim 1, characterized in that: The stabilizing block (6) includes a base plate (7), and a plug-in block (8) is provided in the middle of the base plate (7) to cooperate with the transverse gap (4).

3. The wide-body ceramic inner cylinder for a cement kiln preheater according to claim 2, characterized in that: The cross-section of the plug block (8) is trapezoidal, and its width gradually increases downward from the end connected to the substrate (7).

4. The wide-body ceramic inner cylinder for a cement kiln preheater according to claim 2, characterized in that: The lower surface of the substrate (7) is provided with a snap-fit ​​protrusion (9) corresponding to the position of the longitudinal gap (5). Both ends of the snap-fit ​​protrusion (9) are provided with extension plates (10). The thickness of the extension plates (10) gradually decreases from the end connected to the snap-fit ​​protrusion (9) outward.

5. The wide-body ceramic inner cylinder for a cement kiln preheater according to any one of claims 1-4, characterized in that: The ceramic hanging piece (3) includes a connecting part (11) and a hanging part (12). The connecting part (11) is provided with a pin hole (13), and the inner side wall of the hanging part (12) is provided with a locking pin (14).

6. The wide-body ceramic inner cylinder for a cement kiln preheater according to claim 5, characterized in that: A snap-fit ​​boss (15) is provided between the connecting part (11) and the hook-fitting part (12).

7. The wide-body ceramic inner cylinder for a cement kiln preheater according to claim 5, characterized in that: The cross-section of the locking pin (14) is a right trapezoid, with the right-angled side located at the top.

8. The wide-body ceramic inner cylinder for a cement kiln preheater according to claim 7, characterized in that: There are multiple locking pins (14), and the number and position of the pin holes (13) correspond to the locking pins (14).

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