Rotary kiln mouth guard plate for cement production

Abstract

This utility model relates to the field of protective plate technology and discloses a rotary kiln inlet protective plate for cement production. It includes a kiln inlet protective plate body, a storage groove on the outer side of the body, and a laterally displaceable connecting sealing block within the storage groove. The connecting sealing block is elastically connected to the inner side of the kiln inlet protective plate body via an elastic component. A power chamber is formed on the inner side of the body, and a transmission component capable of pushing the elastic component is located inside the power chamber. The connecting sealing block adaptively adjusts the sealing gap through lateral displacement during the thermal expansion of the rotary kiln. A sealing gasket is fixedly connected to one end of the connecting sealing block on the outer side of the body, and a sliding fit is formed between the storage groove and the sealing block. This rotary kiln inlet protective plate for cement production has advantages such as adjustable length and improved sealing between the protective plates.

Description

Technical Field

[0001] This utility model relates to the field of protective plate technology, specifically a protective plate for the kiln mouth of a rotary kiln used in cement production. Background Technology

[0002] The rotary kiln inlet guard plate for cement production is a key protective component installed in the kiln inlet area. This area is the core location for material entry and exit and gas exchange, and it is subjected to harsh conditions such as high temperature (usually above 1200℃), material particle erosion, mechanical stress and thermal shock for a long time. The guard plate is generally made of special materials such as high chromium nickel alloy and wear-resistant cast iron, which are resistant to high temperature, wear and have good thermal shock resistance. It is tightly attached to the outside of the kiln cylinder by bolting or welding to form a high temperature and wear resistant protective layer.

[0003] In rotary kiln equipment used in cement production, the kiln mouth guard plate is a key component that resists the erosion of high-temperature materials and protects the kiln structure. Its sealing performance directly affects the stability of airflow inside the kiln, thermal efficiency, and equipment life. Currently, the guard plates are usually sealed by using a tenon and groove structure with reserved expansion gaps or by filling them with refractory fibers, asbestos ropes, and other materials.

[0004] However, during use, the difference in thermal expansion coefficients between the liner plate and the kiln body (approximately 3:1) causes dynamic changes in the gap. Traditional rigid tenon and groove structures are difficult to adaptively compensate for this, and stress concentration can easily lead to deformation or breakage of the liner plate. Alternatively, the insufficient temperature resistance of filling materials such as asbestos rope (long-term operating temperature <600℃) can cause rapid aging and failure in the high-temperature environment of 1000~1200℃ at the kiln mouth, resulting in an increased air leakage rate (up to 10% or more). This not only leads to heat loss and increased coal consumption (coal consumption per ton of clinker increases by 3~5kg), but also exacerbates the wear of surrounding equipment due to dust overflow. Therefore, a rotary kiln liner plate for cement production is proposed to solve the above-mentioned problems. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a rotary kiln inlet guard plate for cement production. It features adjustable length and improved sealing between guard plates, solving the problem of dynamic gap changes caused by the difference in thermal expansion coefficients between the guard plate and the kiln body (approximately 3:1). Traditional rigid tenon and groove structures struggle to adaptively compensate for these changes, leading to stress concentration, deformation, or breakage. Furthermore, the insufficient temperature resistance of filling materials like asbestos rope (long-term operating temperature <600℃) causes rapid aging and failure at the kiln inlet's 1000-1200℃ high-temperature environment, resulting in increased air leakage (up to 10%). This not only leads to heat loss and increased coal consumption (3-5 kg ​​more coal per ton of clinker) but also exacerbates wear on surrounding equipment due to dust spillage.

[0007] (II) Technical Solution

[0008] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A rotary kiln mouth guard plate for cement production includes a kiln mouth guard plate body. A storage groove is provided on the outer side of the kiln mouth guard plate body. A connecting sealing block that can be laterally displaced is provided in the storage groove. The connecting sealing block is elastically connected to the inner side of the kiln mouth guard plate body through an elastic component. A power cavity is provided on the inner side of the kiln mouth guard plate body. A transmission component that can push the elastic component to move is provided on the inner side of the power cavity. The connecting sealing block adaptively adjusts the sealing gap through lateral displacement when the rotary kiln thermally expands.

[0009] The beneficial effects of this utility model are:

[0010] This rotary kiln inlet guard plate for cement production has the advantage of adjustable length, which improves the sealing between the guard plates.

[0011] Based on the above technical solution, the present invention can be further improved as follows.

[0012] Furthermore, a sealing gasket is fixedly connected to one end of the connecting sealing block on the outer side of the kiln mouth guard plate body, and a sliding fit is formed between the storage tank and the sealing block, and the cross-sectional area of ​​the storage tank is adapted to the cross-sectional area of ​​the connecting sealing block.

[0013] The beneficial effect of adopting the above-mentioned further solution is that the sealing gasket can improve the overall sealing effect.

[0014] Furthermore, the kiln mouth guard plate body includes a connecting guard plate, a bottom plate, and reinforcing ribs. The connecting guard plate is welded to the outer side of the bottom plate to form an L-shaped structure. The reinforcing ribs are welded to the outer side of the connecting guard plate and the bottom plate respectively. The top of the bottom plate has a number of reserved holes.

[0015] Furthermore, the elastic component includes a preload spring, an elastic plate, a sliding guide rod, and a connecting plate. One end of the preload spring is fixedly installed on the outside of the elastic plate, and the other end is fixedly installed with the connecting sealing block. One end of the sliding guide rod is fixedly installed with the elastic plate, and the other end is fixedly installed with the connecting plate.

[0016] The advantage of adopting the above-mentioned further solution is that the elastic component allows the connecting sealing block to move left and right.

[0017] Furthermore, the transmission assembly includes a first inclined block, a second inclined block, a connecting rod, and a connecting block. The outer side of the first inclined block is fixedly installed on the outer side of the connecting plate, and the second inclined block, the connecting rod, and the connecting block are fixedly installed sequentially from bottom to top.

[0018] The beneficial effect of adopting the above-mentioned further solution is that the transmission component can enable the elastic component to move left and right.

[0019] Furthermore, the contact surface of the first inclined block and the second inclined block has an inclination angle of 15-30°, the connecting rod extends through the connecting hole to the top of the kiln mouth guard plate body, and the cross-sectional shape of the connecting rod is polygonal. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a side view of the structure of this utility model;

[0022] Figure 3 This is a partial cross-sectional view of the structure of this utility model;

[0023] Figure 4 This is a connection diagram of the sealing block and the preload spring of this utility model.

[0024] In the diagram: 1. Kiln mouth guard plate body; 101. Connecting guard plate; 102. Base plate; 103. Reinforcing rib; 2. Connecting sealing block; 3. Storage tank; 4. Elastic assembly; 41. Preload spring; 42. Elastic plate; 43. Sliding guide rod; 44. Connecting plate; 5. Power chamber; 6. Transmission assembly; 61. First inclined block; 62. Second inclined block; 63. Connecting rod; 64. Connecting block; 7. Sealing gasket. Detailed Implementation

[0025] 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.

[0026] In the embodiments, by Figure 1-4 The present invention discloses a rotary kiln inlet guard plate for cement production. The present invention includes a kiln inlet guard plate body 1, a storage groove 3 on the outer side of the kiln inlet guard plate body 1, a connecting sealing block 2 that can be laterally displaced in the storage groove 3, the connecting sealing block 2 being elastically connected to the inner side of the kiln inlet guard plate body 1 through an elastic component 4, a power chamber 5 on the inner side of the kiln inlet guard plate body 1, and a transmission component 6 that can push the elastic component 4 to move on the inner side of the power chamber 5. The connecting sealing block 2 adaptively adjusts the sealing gap through lateral displacement when the rotary kiln thermally expands.

[0027] The kiln mouth guard plate body 1 is made of high temperature resistant and wear resistant alloy material, and it is installed at the air outlet position of the rotary kiln mouth by bolts.

[0028] By incorporating a storage tank 3, a connecting sealing block 2, an elastic component 4, and a transmission component 6 into the kiln mouth liner body 1, and utilizing the elastic connection of the elastic component 4 and the transmission action of the transmission component 6, the lateral displacement of the connecting sealing block 2 during the thermal expansion of the rotary kiln is achieved. This allows for adaptive adjustment of the sealing gap, effectively preventing leakage of high-temperature materials and hot gases within the rotary kiln. This improves the sealing performance and operational stability of the rotary kiln, extends the service life of the kiln mouth liner, and reduces maintenance costs and energy waste caused by leakage.

[0029] Among them, the sealing block 2 is fixedly connected to the sealing gasket 7 at one end of the outer side of the kiln mouth guard plate body 1, the storage tank 3 and the sealing block 2 form a sliding fit, and the cross-sectional area of ​​the storage tank 3 is adapted to the cross-sectional area of ​​the sealing block 2.

[0030] The sealing gasket 7 is made of high-temperature resistant and wear-resistant rubber material; during the processing of the storage tank 3, the dimensional accuracy is strictly controlled to ensure that the fit gap between it and the connecting sealing block 2 is appropriate, so as to ensure that the connecting sealing block 2 can slide freely in the storage tank 3, and also to ensure that the two are in close contact to prevent hot air and materials from leaking from the gap between them.

[0031] The sealing gasket 7 installed on the connecting sealing block 2 further enhances the sealing effect and can effectively prevent the leakage of high-temperature materials and hot gas inside the rotary kiln.

[0032] The kiln mouth guard plate body 1 includes a connecting guard plate 101, a bottom plate 102, and a reinforcing rib 103. The connecting guard plate 101 and the outer side of the bottom plate 102 are welded to form an L-shaped structure. The reinforcing rib 103 is welded to the outer side of the connecting guard plate 101 and the bottom plate 102 respectively. The top of the bottom plate 102 has a number of reserved holes.

[0033] The L-shaped structure formed by welding the connecting guard plate 101 and the bottom plate 102 provides basic support and installation framework for the kiln inlet guard plate. The reinforcing ribs 103 enhance the structural strength and stability of the kiln inlet guard plate body 1, enabling it to withstand the high temperature, high pressure, and material impact inside the rotary kiln.

[0034] The elastic component 4 includes a preload spring 41, an elastic plate 42, a sliding guide rod 43, and a connecting plate 44. One end of the preload spring 41 is fixedly installed on the outside of the elastic plate 42, and the other end is fixedly installed on the connecting sealing block 2. One end of the sliding guide rod 43 is fixedly installed on the elastic plate 42, and the other end is fixedly installed on the connecting plate 44.

[0035] The preload spring 41 in the elastic assembly 4 provides elastic force, enabling the connecting sealing block 2 to move elastically within a certain range to accommodate the displacement caused by the thermal expansion of the rotary kiln. The elastic plate 42, sliding guide rod 43, and connecting plate 44 constitute a stable support and guiding structure, ensuring that the preload spring 41 is subjected to uniform force during expansion and contraction, allowing the connecting sealing block 2 to move smoothly laterally, thereby accurately and adaptively adjusting the sealing gap and improving the reliability and stability of the sealing adjustment.

[0036] The transmission assembly 6 includes a first inclined block 61, a second inclined block 62, a connecting rod 63, and a connecting block 64. The outer side of the first inclined block 61 is fixedly installed on the outer side of the connecting plate 44, and the second inclined block 62, the connecting rod 63, and the connecting block 64 are fixedly installed sequentially from bottom to top.

[0037] The contact surface of the first inclined block 61 and the second inclined block 62 has an inclination angle of 15-30°. The connecting rod 63 extends through the connecting hole to the top of the kiln mouth guard plate body 1. The cross-sectional shape of the connecting rod 63 is polygonal.

[0038] The transmission component 6, through the cooperation of the inclined surfaces of the first inclined block 61 and the second inclined block 62, converts the vertical or other directional power applied externally to the connecting block 64 into the lateral power that pushes the elastic component 4, thus realizing the effective transmission and conversion of power.

[0039] Working principle:

[0040] When the entire device is to be used, after the kiln mouth guard plate body 1 is installed on the outside of the rotary kiln by fasteners such as bolts, the connecting plate 44 can be moved left and right by pressing the connecting block 64, which drives the connecting sealing block 2 to move, so that the connecting sealing block 2 comes into contact with the outside of another kiln mouth guard plate body 1, improving the sealing performance of the kiln mouth guard plate body 1. At the same time, during use, the pre-compression spring 41 in the elastic component 4 provides elastic force, so that the connecting sealing block 2 can move elastically within a certain range to adapt to the displacement caused by the thermal expansion of the rotary kiln.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0042] 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 rotary kiln inlet protector for cement production, comprising a kiln inlet protector body (1), characterized in that: The kiln mouth guard plate body (1) has a storage groove (3) on its outer side. The storage groove (3) has a connecting sealing block (2) that can move laterally. The connecting sealing block (2) is elastically connected to the inner side of the kiln mouth guard plate body (1) through an elastic component (4). The kiln mouth guard plate body (1) has a power chamber (5) on its inner side. The power chamber (5) has a transmission component (6) that can push the elastic component (4) to move on its inner side. The connecting sealing block (2) adaptively adjusts the sealing gap by lateral displacement when the rotary kiln expands thermally.

2. The rotary kiln inlet guard plate for cement production according to claim 1, characterized in that: The connecting sealing block (2) is fixedly connected to a sealing gasket (7) at one end of the outer side of the kiln mouth guard plate body (1). The storage tank (3) and the sealing block (2) form a sliding fit, and the cross-sectional area of ​​the storage tank (3) is adapted to the cross-sectional area of ​​the connecting sealing block (2).

3. The rotary kiln inlet guard plate for cement production according to claim 1, characterized in that: The kiln mouth guard plate body (1) includes a connecting guard plate (101), a bottom plate (102) and a reinforcing rib (103). The connecting guard plate (101) is welded to the outside of the bottom plate (102) to form an L-shaped structure. The reinforcing rib (103) is welded to the outside of the connecting guard plate (101) and the bottom plate (102) respectively. The bottom plate (102) has a number of reserved holes at its top.

4. The rotary kiln inlet guard plate for cement production according to claim 1, characterized in that: The elastic component (4) includes a preload spring (41), an elastic plate (42), a sliding guide rod (43), and a connecting plate (44). One end of the preload spring (41) is fixedly installed on the outside of the elastic plate (42), and the other end is fixedly installed on the connecting sealing block (2). One end of the sliding guide rod (43) is fixedly installed on the elastic plate (42), and the other end is fixedly installed on the connecting plate (44).

5. A rotary kiln inlet guard plate for cement production according to claim 4, characterized in that: The transmission assembly (6) includes a first inclined block (61), a second inclined block (62), a connecting rod (63), and a connecting block (64). The outer side of the first inclined block (61) is fixedly installed on the outer side of the connecting plate (44), and the second inclined block (62), the connecting rod (63), and the connecting block (64) are fixedly installed from bottom to top.

6. A rotary kiln inlet guard plate for cement production according to claim 5, characterized in that: The contact surface of the first inclined block (61) and the second inclined block (62) has an inclination angle of 15-30°. The connecting rod (63) extends through the connecting hole to the top of the kiln mouth guard plate body (1). The cross-sectional shape of the connecting rod (63) is polygonal.

Images