Tertiary air gate valve of rotary kiln

Abstract

The utility model relates to the technical field of rotary cement kilns, in particular to a tertiary air gate valve of a rotary kiln, which comprises a valve body, two side surfaces of the valve body are respectively a windward side and a leeward side, the windward side and the leeward side are respectively provided with a mounting slot, and a grid piece matched with the windward side in appearance is arranged in the mounting slot on the windward side. The grid piece with the grid area is arranged on the windward side of the valve body, then the first baffles are fixed to the grid area through the fixing assemblies, the multiple first baffles can cover the surface of the windward side of the valve body after being tightly attached and arranged, and when airflow is carried with high temperature and fixed particles and impacts on the valve body, the valve body is not prone to falling off. When the baffle plate I is damaged, the baffle plate I acts on the baffle plate I, and after the surface of the baffle plate I is damaged, the corresponding damaged baffle plate I is disassembled by utilizing the fixing assembly and is replaced by a new baffle plate I.

Description

Technical Field

[0001] This utility model relates to the field of cement rotary kiln technology, and in particular to a rotary kiln tertiary air damper valve. Background Technology

[0002] In the new dry process cement production line system, the distribution of air volume between the rotary kiln and the decomposition furnace is achieved by controlling the opening degree of the kiln tail constriction and the tertiary air damper valve. The tertiary air damper valve is an important component of the rotary kiln system operation control. Its main function is to regulate the balance between the tertiary air volume in the rotary kiln and the air volume in the decomposition furnace by opening the tertiary air valve, thereby regulating the combustion state of the decomposition furnace and thus regulating the thermal conditions of the cement clinker calcination system. The tertiary air damper valve directly affects the operating rate of the rotary kiln and the cement quality.

[0003] The ambient temperature inside a rotary kiln typically fluctuates around 1000℃. Located between the kiln head and tail, the tertiary air damper is directly exposed to high-temperature airflow. In particular, the hot airflow within the rotary kiln first impacts the windward side of the damper. This airflow carries a large amount of particulate matter and high-temperature gas, accelerating the wear on the windward side of the damper. This results in mechanical wear and thermal stress on the windward side, leading to material fatigue, cracking, or deformation. In actual use, the damaged area on the windward side of the damper is usually fragmented and discontinuous. If damage is detected on the damper surface, and only a small area is damaged, the entire damper needs to be replaced for production safety reasons, leading to increased operating costs and wasted resources.

[0004] Based on the above situation, it is necessary to design a tertiary air damper valve for rotary kilns to solve the above problems. Utility Model Content

[0005] This utility model provides a tertiary air damper valve for rotary kilns, which solves the problem that if a certain area of ​​the valve body surface of the tertiary air damper valve is damaged, replacing the entire valve would increase the cost of use.

[0006] The technical problem solved by this utility model is achieved by the following technical solution:

[0007] A rotary kiln tertiary air damper valve includes a valve body with two sides, one facing the wind and the other the leeward. Mounting slots are provided on both the wind-facing and leeward sides. A mesh element matching the shape of the wind-facing surface is installed in the mounting slot on the wind-facing side. Several baffles with their sidewalls tightly abutting each other and covering the surface of the mesh element are provided on the mesh element. A fixing assembly is provided on the valve body for connecting the baffles to the mesh element.

[0008] Preferably, a grid is provided on both the windward and leeward sides. The grid consists of several horizontal ribs and several vertical ribs perpendicular to the horizontal ribs. The horizontal ribs and vertical ribs are arranged alternately to form several grid areas for placing the baffle.

[0009] Preferably, the grid area is connected to a slotted plate with a slot, and the side of the baffle facing the windward side is provided with a protrusion corresponding to the slot. When the baffle is placed on the grid area, the protrusion is locked in the slot of the slotted plate; a fastener with a threaded hole is fixedly connected to the side of the baffle facing the windward side.

[0010] Preferably, the fixing component includes a plurality of connecting posts that pass through and are fixed to the valve body, and a bolt connected to the connecting posts and having one end passing through the connecting posts. The two ends of the connecting posts extend to the leeward side and the windward side, respectively. The end of the connecting post near the windward side extends into the grid area and has a connecting slot. When the baffle is placed on the grid area, the fixing component is engaged in the connecting slot.

[0011] Preferably, a baffle plate is fixed to the grid area of ​​the grid member on the leeward side by bolt two.

[0012] Preferably, a sealing component one is fixedly connected to the side of the baffle facing the leeward side, and a sealing component two is connected in the grid area corresponding to the sealing component one, with the sealing component one and the sealing component two being movably engaged.

[0013] Preferably, a support member is connected within the grid area on the windward side, and when the baffle is placed on the grid area, the support member contacts the baffle.

[0014] The beneficial effects of this utility model are as follows: By setting a mesh component with a grid area on the windward surface of the valve body, and then fixing a baffle plate to the grid area using a fixing component, after several baffle plates are arranged in close contact, the windward surface of the valve body can be covered. When the airflow carrying high temperature and fixed particles impacts the valve body, it will first act on the baffle plate. When the surface of the baffle plate is damaged, the corresponding damaged baffle plate can be removed using the fixing component and replaced with a new baffle plate. The operation is convenient and can avoid replacing the entire valve body after a part of the valve body surface is damaged, thus saving the use cost of the valve body and avoiding excessive waste of resources. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0018] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0019] Figure 4 This is a partial exploded structure diagram of the present invention. Figure 1 ;

[0020] Figure 5 This is a partial exploded structure diagram of the present invention. Figure 2 ;

[0021] Figure 6 This is a partial structural diagram of the present invention. Figure 1 ;

[0022] Figure 7 This is a partial structural diagram of the present invention. Figure 2 ;

[0023] Figure 8 This is a three-dimensional structural diagram of the valve body of this utility model;

[0024] Figure 9 This is a schematic diagram of the three-dimensional structure of the mesh component and valve body of this utility model.

[0025] In the diagram, 1. Valve body; 2. Windward side; 3. Leeward side; 4. Mounting slot; 5. Grid component; 6. Baffle 1; 7. Horizontal rib; 8. Vertical rib; 9. Grid area; 10. Slot plate; 11. Slot; 12. Protrusion; 13. Fixing component; 14. Bolt 1; 15. Connecting column; 16. Connecting slot; 17. Baffle 2; 18. Bolt 2; 19. Sealing component 1; 20. Sealing component 2; 21. Support component. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0027] Reference Figures 1-9 As shown, the rotary kiln tertiary air damper valve includes a valve body 1, which refers to the main body of the tertiary air damper valve. The valve body 1 itself is generally made of high-temperature resistant and heat-insulating material. When the valve body 1 is installed in the rotary kiln, its two sides are the windward side 2 and the leeward side 3, respectively. The windward side 2 will directly face the high-temperature gas flowing in the rotary kiln pipe and the fixed particles, and has a high degree of wear. The leeward side 3 has a lower degree of wear compared to the windward side 2. Both the windward side 2 and the leeward side 3 are provided with installation slots 4. The installation slots 4 on the windward side 2 are provided with mesh parts 5 that match the shape of the windward side 2. Since the edge of the valve body 1 is the air-locking edge of the valve body 1, the main function of this edge structure is to prevent air leakage when the tertiary air damper valve is closed and to ensure the sealing of the system. Therefore, the installation slots 4 in this device are opened without affecting the use of the structure.

[0028] Next, in order to strengthen the protection of the windward side 2, several baffles 6 with side walls closely attached to each other and covering the surface of the mesh 5 are provided on the mesh 5. The valve body 1 is provided with a fixing component for connecting the baffles 6 to the mesh 5, and the number of the fixing components is the same as the number of baffles 6. Each fixing component only works on a single baffle 6 installed at the corresponding position on the mesh 5.

[0029] In use, when several baffles 6 are installed one by one, aligned with their corresponding positions on the mesh piece 5, the fixing assembly secures the baffles 6 to the mesh piece 5. Since the mesh piece 5 is connected to the valve body 1 via a fixed connection (the method of connection is not limited), the purpose is to fix the mesh piece 5 to the valve body 1. Therefore, the baffles 6 are fixed to the valve body 1. Furthermore, because the shape and surface area of ​​the baffles 6 are customized according to the shape and surface area of ​​the mesh piece 5, a certain number of baffles 6, when fixed to the mesh piece 5, and... When several baffles 6 are placed close together, they can cover the windward surface 2 of the valve body 1. When the airflow carrying high temperature and fixed particles impacts the valve body 1, it will first act on the baffles 6. When the surface of the baffles 6 is damaged, the corresponding damaged baffles 6 can be removed using the fixing components and replaced with new baffles 6. In this way, it is possible to avoid replacing the entire valve body 1 after a part of the valve body 1 is damaged, thus saving the use cost of the valve body 1 and avoiding excessive waste of resources.

[0030] To enhance the wear resistance of the leeward side 3, both the windward side 2 and the leeward side 3 are provided with mesh components 5. The mesh component 5 consists of several horizontal ribs 7 and several vertical ribs 8 perpendicular to the horizontal ribs 7. The several horizontal ribs 7 and several vertical ribs 8 are arranged alternately to form several mesh areas 9 for placing baffles 6. Each fixing component corresponds to a single mesh area 9.

[0031] To ensure that the baffle 6 is installed on the grid area 9 without any positional deviation, a slotted plate 10 with a slot 11 is connected within the grid area 9. The side of the baffle 6 facing the windward side 2 has a protrusion 12 corresponding to the slot 11. When the baffle 6 is placed on the grid area 9, the protrusion 12 is engaged in the slot 11 of the slotted plate 10, thereby ensuring that the baffle 6 is accurately positioned during installation, accelerating the installation speed of the baffle 6, and also reducing the impact of the baffle 6 on the peripheral baffles after deformation due to thermal stress.

[0032] The fixing assembly includes several connecting posts 15 that pass through and are fixed to the valve body 1, and bolts 14 that are connected to the connecting posts 15 and have one end passing through the connecting posts 15. The two ends of the connecting posts 15 extend to the leeward side 3 and the windward side 2, respectively. The end of the connecting post 15 near the windward side 2 extends into the grid area 9 and has a connecting slot 16. Because the side of the baffle 6 facing the windward side 2 is fixedly connected to a fixing member 13 with a threaded hole, when the baffle 6 is placed on the grid area 9, the fixing member 13 is engaged in the connecting slot 16. Moreover, one end of the bolt 14 is threaded into the connecting post 15, and the other end of the bolt 14 passes through the connecting post 15 and extends into the fixing member 13 that is engaged in the connecting slot 16 and is threadedly connected to the threaded hole on the fixing member 13. At this time, the baffle 6 is fixed to the grid member 5 under the action of the bolt 14, and thus connected to the valve body 1.

[0033] Because the leeward side 3 of valve body 1 is also affected by the high temperature of the airflow and fixed particles, and because the bolt head of bolt 14 is located on the leeward side 3, bolt 14 is highly susceptible to the influence of the internal environment of the rotary kiln during use. Under high temperature, the material properties of bolt 14 will change. For example, materials with different coefficients of thermal expansion will expand at different rates when heated, potentially leading to uneven stress distribution within bolt 14 and deformation. Since bolt 14 is relatively long and runs through both sides of valve body 1, deformation of bolt 14 will make it difficult to remove from connecting column 15, potentially damaging valve body 1 itself and affecting the replacement of baffle 6. In order to reduce the impact of temperature and high-temperature particles in the environment on bolt 14 and the impact of high-temperature particles in the environment on the leeward side 3 of valve body 1, baffle 2 17 is fixed on the grid area 9 of the grid piece 5 on the leeward side 3 by bolt 2 18. The number of bolts 2 18 used is adjusted according to the shape and position of baffle 2 17. Baffle 2 17 will isolate high-temperature particles in the environment from affecting bolt 14. If baffle 2 17 or bolt 2 18 deforms due to thermal stress, it can be removed directly. Compared with the adverse consequences caused by the deformation of bolt 14, the adverse consequences caused by bolt 2 18 are less severe.

[0034] A sealing component 19 is fixedly connected to the side of the baffle 17 facing the leeward side 3. A sealing component 20 is connected to the grid area 9 corresponding to the sealing component 19. The sealing component 19 and the sealing component 20 are movably engaged. When the two are engaged, a relatively closed space is formed inside. The bolt head of the bolt 14 is located in this closed space. Under the action of the baffle 6, the bolt 14 is isolated from the external environment.

[0035] Finally, a support member 21 is connected within the grid area 9 on the windward side 2. When the baffle 6 is placed on the grid area 9, the support member 21 contacts the baffle 6. Under the action of the support member 21, the compression of the grid member 5 when the baffle 6 deforms can be effectively prevented. Secondly, the support member 21 also increases the contact area between the baffle 6 and the grid member 5, avoiding the baffle 6 being suspended and increasing the deformation resistance of the baffle 6.

Claims

1. A rotary kiln tertiary air damper valve, comprising a valve body (1), characterized in that, The two sides of the valve body (1) are the windward side (2) and the leeward side (3), respectively. The windward side (2) and the leeward side (3) are provided with mounting slots (4). The mounting slots (4) on the windward side (2) are provided with mesh parts (5) that match the shape of the windward side (2). The mesh parts (5) are provided with several baffles (6) whose side walls are closely attached to each other and cover the surface of the mesh parts (5). The valve body (1) is provided with a fixing component for connecting the baffles (6) to the mesh parts (5).

2. The rotary kiln tertiary air damper valve according to claim 1, characterized in that, Both the windward side (2) and the leeward side (3) are provided with mesh components (5). Each mesh component (5) consists of several horizontal ribs (7) and several vertical ribs (8) perpendicular to the horizontal ribs (7). The horizontal ribs (7) and the vertical ribs (8) are arranged alternately to form several mesh areas (9) for placing the baffle (6).

3. The rotary kiln tertiary air damper valve according to claim 2, characterized in that, The grid area (9) is connected to a slot plate (10) with a slot (11). The side of the baffle (6) facing the windward side (2) is provided with a protrusion (12) corresponding to the slot (11). When the baffle (6) is placed on the grid area (9), the protrusion (12) is locked in the slot (11) of the slot plate (10). The side of the baffle (6) facing the windward side (2) is fixedly connected to a fastener (13) with a threaded hole.

4. The rotary kiln tertiary air damper valve according to claim 3, characterized in that, The fixing component includes several connecting posts (15) that pass through and are fixed on the valve body (1) and a bolt (14) that is connected to the connecting posts (15) and has one end that passes through the connecting posts (15). The two ends of the connecting posts (15) extend to the leeward side (3) and the windward side (2) respectively. The end of the connecting post (15) near the windward side (2) extends into the grid area (9) and is provided with a connecting slot (16). When the baffle (6) is placed on the grid area (9), the fixing member (13) is engaged in the connecting slot (16).

5. The rotary kiln tertiary air damper valve according to claim 1, characterized in that, A baffle plate (17) is fixed to the grid area (9) of the grid piece (5) located on the leeward side (3) by bolt two (18).

6. The rotary kiln tertiary air damper valve according to claim 5, characterized in that, The baffle 2 (17) is fixedly connected to the side facing the leeward side (3) with a sealing component 1 (19), and a sealing component 2 (20) is connected in the grid area (9) corresponding to the sealing component 1 (19). The sealing component 1 (19) and the sealing component 2 (20) are movably engaged.

7. The rotary kiln tertiary air damper valve according to claim 2, characterized in that, A support member (21) is connected within the grid area (9) on the windward side (2). When the baffle (6) is placed on the grid area (9), the support member (21) is in contact with the baffle (6).

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