Automatic feeding device for rotary kiln in limestone calcination

Abstract

This application provides an automatic feeding device for a rotary kiln used in limestone calcination. The kiln housing has an installation cavity with an inlet and an outlet. A traction belt is vertically positioned within the installation cavity, with both ends abutting against the inner wall of the kiln housing. A drive mechanism is mounted on the kiln housing and connected to the traction belt. Multiple conveyor plates are hinged at one end to the traction belt. Adjacent conveyor plates, the traction belt, and the inner wall of the installation cavity form a conveying chamber. Material is placed within the conveying chamber. Each conveying chamber can sequentially connect to the inlet and outlet due to the rotation of the traction belt. A stop block is positioned along the conveyor plate's path. Under the obstruction of the stop block, one conveyor plate in the conveying chamber connected to the outlet can be flipped. This application, through the hinged conveyor plates combined with an energy storage device and a stop block, achieves automatic flipping of the conveyor plates at the outlet position, changing the distance between adjacent conveyor plates, preventing material jamming and the formation of "bridging," facilitating material discharge, and improving feeding efficiency.

Description

Technical Field

[0001] This application belongs to the technical field of feeding equipment, and more specifically, relates to an automatic feeding device for a rotary kiln used in limestone calcination. Background Technology

[0002] Limestone calcination is the core process in lime production, involving the high-temperature decomposition of calcium carbonate in limestone to produce calcium oxide and carbon dioxide. Rotary kilns are generally used for limestone calcination due to their significant advantages in terms of capacity, automation, product quality, and raw material adaptability, making them particularly suitable for large-scale, high-quality lime production.

[0003] When feeding materials into a rotary kiln, a bucket elevator is generally used. Depending on the size of the rotary kiln, limestone raw materials generally need to be crushed into small pieces with a diameter of 20 to 150 millimeters, and a wear-resistant deep bucket elevator is required.

[0004] However, bucket elevators rely on a combination of centrifugal force and gravity to discharge materials. But when lumpy limestone materials are being loaded, their own weight and impact can cause them to become stuck in the buckets, forming a "bridge"-like structure, making it difficult for the material to be discharged and reducing the feeding efficiency of the bucket elevator. Utility Model Content

[0005] The purpose of this application is to provide an automatic feeding device for a rotary kiln used in limestone calcination, so as to prevent material jamming and blockage and improve feeding efficiency.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: An automatic feeding device for a rotary kiln used in limestone calcination is provided, comprising a casing, a traction belt, a drive mechanism, multiple conveying plates, and blocks. The casing is sealed and has an installation cavity within it. An inlet is located near the bottom of the casing, and an outlet is located near the top. The traction belt is vertically positioned within the installation cavity, with both ends abutting against the inner wall of the casing. The drive mechanism is mounted on the casing and connected to the traction belt, driving the traction belt to rotate. One end of each conveying plate is hinged to the traction belt, and the sidewalls of the conveying plates are aligned with the corresponding sections of the installation cavity. The sidewalls abut against each other, and an energy storage device is provided between the conveying plate and the traction belt to fix the angle between the conveying plate and the traction belt when the external force does not reach a threshold. Adjacent conveying plates, the traction belt, and the inner wall of the mounting cavity form a conveying cavity. Material is placed in the conveying cavity. Each conveying cavity can be connected to the inlet and the outlet in sequence due to the rotation of the traction belt. A stop block is provided at the outlet and on the travel path of the conveying plate. Under the obstruction of the stop block, one of the conveying plates of the conveying cavity connected to the outlet can be flipped and the energy storage device can store energy. After the conveying plate passes the stop block, the energy storage device releases energy and the conveying plate resets.

[0007] In one possible implementation, the drive mechanism includes two drive rollers and a drive motor, wherein the two drive rollers are rotatably disposed within the mounting cavity, the traction belt is sleeved on the drive rollers and the traction belt is tensioned; the drive motor is disposed on the housing and connected to one of the drive rollers, and the drive mechanism is used to drive the drive rollers to rotate and drive the traction belt to rotate.

[0008] In one possible implementation, the traction belt is a synchronous belt with a toothed structure on its inner side, and the drive roller is a synchronous pulley with a toothed structure on its sidewall that is adapted to the synchronous belt.

[0009] In one possible implementation, the conveyor plate is arranged at an angle, and when the conveyor plate rises, the end of the conveyor plate away from the traction belt is higher than the end of the conveyor plate near the traction belt.

[0010] In one possible implementation, multiple sets of hinge blocks are evenly arranged on the outer side of the traction belt. Each set of hinge blocks includes two that are spaced apart along the width direction of the traction belt. The hinge blocks are provided with hinge holes. The top of the conveyor plate is provided with a hinge plate. The hinge plate is provided with a hinge shaft, and the hinge shaft is inserted into the hinge hole.

[0011] In one possible implementation, the hinge block is chamfered at the edge facing the feed plate, and the edge of the hinge plate is also chamfered.

[0012] In one possible implementation, the energy storage element is selected as a torsion spring, which is sleeved on the hinge shaft, with one end of the torsion spring connected to the hinge block and the other end of the torsion spring connected to the conveyor plate.

[0013] In one possible implementation, the inner wall of the housing is provided with multiple limiting grooves, and the side wall of the conveying plate is provided with multiple limiting rods. The limiting rods correspond one-to-one with the limiting grooves, the limiting rods are inserted into the limiting grooves, and the width of the limiting groove is equal to the diameter of the limiting rod.

[0014] In one possible implementation, the housing is provided with a tilting groove, which is located near the discharge port of the housing. The width of the tilting groove is the same as the width of the mounting cavity, and the length of the tilting groove is not less than the distance between adjacent conveyor plates.

[0015] In one possible implementation, the inner wall of the housing is provided with an elliptical sealing groove, and the two ends of the traction belt are inserted into the sealing groove.

[0016] The beneficial effects of the automatic feeding device for rotary kiln used in limestone calcination provided in this application are as follows: Compared with the prior art, this application effectively prevents dust from overflowing and improves the working environment through the sealed casing design; the articulated conveying plate, together with the energy storage device and the stop, realizes the automatic flipping of the conveying plate at the discharge port, changes the distance between adjacent conveying plates, completely solves the "bridging" problem caused by material jamming, and facilitates the discharge of materials under the action of gravity and centrifugal force. In addition, the continuous conveying chamber design improves the feeding efficiency and adapts to the needs of large-scale production. The setting of the energy storage device enables the conveying plate to maintain a fixed angle when the external force is insufficient, ensuring stable material conveying. Under the obstruction of the stop, the external force reaches the threshold to realize the flipping of the conveying plate and realize auxiliary unloading. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the automatic feeding device for a rotary kiln used for limestone calcination provided in an embodiment of this application;

[0019] Figure 2This is a schematic diagram of the internal structure of the automatic feeding device for a rotary kiln used in limestone calcination provided in an embodiment of this application.

[0020] Figure 3 for Figure 2 Enlarged view of part A;

[0021] Figure 4 This is a schematic diagram of the traction belt provided in an embodiment of this application;

[0022] Figure 5 for Figure 4 Enlarged view of part B;

[0023] Figure 6 This is a schematic diagram of the material conveyor plate provided in an embodiment of this application.

[0024] The labels for the attached figures are as follows:

[0025] 1. Machine casing; 2. Traction belt; 3. Drive mechanism; 4. Conveyor plate; 5. Stop block;

[0026] 101. Mounting cavity; 102. Feed inlet; 103. Discharge outlet; 104. Limiting groove; 105. Tilting groove;

[0027] 201. Hinge block; 202. Hinge hole;

[0028] 301. Drive roller; 302. Drive motor;

[0029] 401. Hinge plate; 402. Hinge shaft; 403. Limiting rod. Detailed Implementation

[0030] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0031] It should be further noted that the accompanying drawings and embodiments of this application mainly describe the concept of this application. Based on this concept, some specific forms and arrangements of connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, under the premise that those skilled in the art understand the concept of this application, they can implement the above-mentioned specific forms and arrangements in a well-known manner.

[0032] When a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0033] The terms “length”, “width”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0034] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, and "several" means one or more, unless otherwise explicitly specified.

[0035] The automatic feeding device for rotary kiln used in limestone calcination provided in this application will now be described.

[0036] Please refer to the following: Figures 1 to 6 The automatic feeding device for a rotary kiln used in limestone calcination includes a casing 1, a traction belt 2, a drive mechanism 3, multiple conveying plates 4, and stop blocks 5. The casing 1 is sealed and has an installation cavity 101. A feed inlet 102 is located near the bottom of the casing 1, and a discharge outlet 103 is located near the top. The traction belt 2 is vertically positioned within the installation cavity 101, with both ends abutting against the inner wall of the casing 1. The drive mechanism 3 is mounted on the casing 1 and connected to the traction belt 2, driving the traction belt 2 to rotate. Multiple conveyor plates 4 are hinged at one end to the traction belt 2. The side wall of the conveyor plate 4 abuts against the corresponding side wall of the mounting cavity 101. An energy storage device is provided between the conveyor plate 4 and the traction belt 2 to fix the included angle between the conveyor plate 4 and the traction belt 2 when the external force does not reach the threshold. Adjacent conveyor plates 4, traction belt 2 and the inner wall of the mounting cavity 101 form a conveying cavity. The material is placed in the conveying cavity. Each conveying cavity can be connected to the inlet 102 and the outlet 103 in sequence due to the rotation of the traction belt 2. A stop block 5 is provided at the outlet 103. The stop block 5 is located on the travel path of the conveyor plate 4. Under the obstruction of the stop block 5, one of the conveyor plates 4 in the conveying cavity connected to the outlet 103 can be flipped and the energy storage device can store energy. After the conveyor plate 4 passes the stop block 5, the energy storage device releases energy and the conveyor plate 4 is reset.

[0037] The beneficial effects of the automatic feeding device for a rotary kiln used for limestone calcination provided in this embodiment are as follows: Compared with the prior art, the automatic feeding device for a rotary kiln used for limestone calcination provided in this embodiment effectively prevents dust from overflowing through the sealed housing 1 design, thus improving the working environment; the articulated conveying plate 4, in conjunction with the energy storage component and the stop block 5, enables the conveying plate 4 to automatically flip at the discharge port, changing the distance between adjacent conveying plates 4, completely solving the "bridging" problem caused by material jamming, and facilitating the discharge of materials under the action of gravity and centrifugal force. In addition, the continuous conveying chamber design improves the feeding efficiency and adapts to the needs of large-scale production. The setting of the energy storage component allows the conveying plate 4 to maintain a fixed angle when the external force is insufficient, ensuring stable material conveying. Under the obstruction of the stop block 5, the external force reaches the threshold to achieve the flipping of the conveying plate 4, realizing auxiliary unloading.

[0038] like Figure 2 and Figure 3 As shown, the baffle 5 is located at the bottom of the discharge port 103. On the one hand, it can block the conveying plate 4, causing the conveying plate 4 to flip and avoid it. On the other hand, it changes the distance between adjacent conveying plates 4, causing the material to loosen and be discharged. It can also partially overlap with the conveying plate 4, so that the material is discharged from the discharge port 103 and prevents the material from leaking down.

[0039] like Figure 1 As shown, the drive mechanism 3 includes two drive rollers 301 and a drive motor 302. The two drive rollers 301 are rotatably disposed in the mounting cavity 101, and the traction belt 2 is sleeved on the drive rollers 301 and is tensioned. The drive motor 302 is disposed on the housing 1 and is connected to one of its drive rollers 301. The drive mechanism 3 is used to drive the rollers 301 to rotate and drive the traction belt 2 to rotate.

[0040] The dual-roller drive ensures smooth operation of the traction belt 2, while also facilitating tensioning to prevent slippage and improve transmission efficiency. The modular design facilitates maintenance and power adjustment; the drive motor 302 is directly connected to the rollers, simplifying the transmission chain and reducing the failure rate. This structure is particularly suitable for heavy-duty applications, ensuring stability during long-term continuous operation.

[0041] like Figure 2 and Figure 4 As shown, the traction belt 2 is a synchronous belt with a toothed structure on the inner side, and the drive roller 301 is a synchronous wheel with a toothed structure on the side wall that is compatible with the synchronous belt.

[0042] The toothed engagement of the synchronous belt and synchronous pulley eliminates transmission slippage, ensuring the positioning accuracy of the conveyor plate 4. The toothed structure enhances transmission reliability and avoids material accumulation caused by slippage. At the same time, the synchronous belt design can reduce noise and extend the service life of the equipment, making it especially suitable for high-frequency start-stop conditions.

[0043] In this embodiment, the conveyor plate 4 is arranged at an angle, and when the conveyor plate 4 rises, the end of the conveyor plate 4 away from the traction belt 2 is higher than the end of the conveyor plate 4 close to the traction belt 2.

[0044] like Figure 2 As shown, the inclined conveyor plate 4 forms a natural guiding angle. During the upward process, the conveyor plate 4 is subjected to the pressure of the material, and the higher end of the conveyor plate 4 abuts against the inner wall of the housing 1. The housing 1 plays a supporting role for the conveyor plate 4. When the conveyor plate 4 turns to the unloading end, the end of the conveyor plate 4 away from the traction belt 2 will tilt downward, which facilitates the discharge of material and effectively reduces residue.

[0045] Combination Figure 4 , Figure 5 and Figure 6 As shown, multiple sets of hinge blocks 201 are evenly arranged on the outer side of the traction belt 2. Each set of hinge blocks 201 includes two that are spaced apart along the width direction of the traction belt 2. The hinge blocks 201 are provided with hinge holes 202. The top of the conveyor plate 4 is provided with a hinge plate 401. The hinge plate 401 is provided with a hinge shaft 402. The hinge shaft 402 is inserted into the hinge hole 202.

[0046] The dual-point spacing of the hinge block 201 enhances connection stability, disperses hinge torque, and extends component life. The mating design of the hinge hole 202 and the hinge shaft 402 simplifies the installation process, facilitates maintenance and replacement, and the spacing in the width direction prevents lateral swaying, ensuring the accurate running trajectory of the feed plate 4.

[0047] Furthermore, the hinge block 201 is chamfered at the edge facing the conveyor plate 4, and the hinge plate 401 is also chamfered at the edge.

[0048] The chamfered edge design of hinge block 201 reduces frictional resistance and prevents sharp edges from damaging mating components. The chamfer also facilitates the installation and maintenance of the torsion spring, reducing assembly difficulty. This design further optimizes the smoothness of the feed plate 4's flipping, reducing the risk of jamming.

[0049] As a preferred technical solution, the energy storage component is a torsion spring, which is sleeved on the hinge shaft 402. One end of the torsion spring is connected to the hinge block 201, and the other end of the torsion spring is connected to the conveyor plate 4.

[0050] The torsion spring provides precise reset torque control, ensuring rapid reset of the feed plate 4 after flipping. Its sleeve-shaft mounting saves space and features a compact structure. The bidirectional force design balances the reliability of both flipping and reset actions, making it suitable for high-frequency operation. The elastic characteristics of the torsion spring can be adjusted according to the material weight, enhancing adaptability. Of course, in addition to torsion springs, energy storage components such as air springs can also be used, but the installation method needs to be adjusted accordingly.

[0051] like Figure 2As shown, the inner wall of the housing 1 is provided with multiple limiting grooves 104, and the side wall of the conveying plate 4 is provided with multiple limiting rods 403. The limiting rods 403 correspond one-to-one with the limiting grooves 104. The limiting rods 403 are inserted into the limiting grooves 104, and the width of the limiting grooves 104 is equal to the diameter of the limiting rods 403.

[0052] The cooperation between the guide groove and the guide rod ensures that when the limiting rod 403 is inserted into the limiting groove 104, the limiting rod 403 abuts against the side wall of the limiting groove 104. When the conveyor plate 4 tends to flip, the limiting rod 403 will be resisted by the limiting groove 104, facilitating the lifting of materials. At the same time, the equal width design also reduces wear and extends service life.

[0053] In addition, the housing 1 is provided with a tilting groove 105, which is located near the discharge port 103. The width of the tilting groove 105 is the same as the width of the mounting cavity 101, and the length of the tilting groove 105 is not less than the distance between adjacent conveyor plates 4. When the conveyor plate 4 moves to the position of the tilting groove 105, the conveyor plate 4 abuts against the stop block 5. At this time, the limiting rod 403 is located in the tilting groove 105, and the limiting groove 104 is no longer restricted, so the conveyor plate 4 can tilt. In addition, after the conveyor plate 4 tilts to avoid the stop block 5 and passes the stop block 5, the tilting plate needs to tilt back at the tilting groove 105 until it moves downward again, at which point the limiting rod 403 is inserted into the corresponding limiting groove 104.

[0054] Finally, an elliptical sealing groove is provided on the inner wall of the housing 1, and both ends of the traction belt 2 are inserted into the sealing groove. The sealing groove can increase the sealing between the mounting cavity 101 and the traction belt 2, preventing material from leaking between the traction belt 2 and the side wall of the mounting cavity 101.

[0055] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An automatic feeding device for a rotary kiln used in limestone calcination, characterized in that, include: The housing (1) is sealed and has an installation cavity (101) inside. The housing (1) has a feed inlet (102) near the bottom and a discharge outlet (103) near the top. The traction belt (2) is vertically disposed in the mounting cavity (101), and both ends of the traction belt (2) abut against the inner wall of the housing (1); A drive mechanism (3) is provided on the housing (1). The drive mechanism (3) is connected to the traction belt (2). The drive mechanism (3) is used to drive the traction belt (2) to rotate. Multiple conveying plates (4) are hinged at one end to the traction belt (2). The side wall of the conveying plate (4) abuts against the corresponding side wall of the mounting cavity (101). An energy storage device is provided between the conveying plate (4) and the traction belt (2) to fix the angle between the conveying plate (4) and the traction belt (2) when the external force does not reach the threshold. The adjacent conveying plates (4), the traction belt (2) and the inner wall of the mounting cavity (101) form a conveying cavity. The material is placed in the conveying cavity. Each conveying cavity can be connected to the inlet (102) and the outlet (103) in sequence due to the rotation of the traction belt (2). A stop (5) is provided at the discharge port (103). The stop (5) is provided on the travel path of the conveying plate (4). Under the obstruction of the stop (5), one of the conveying plates (4) of the conveying chamber that is connected to the discharge port (103) can be flipped and the energy storage device can store energy. After the conveying plate (4) passes the stop (5), the energy storage device releases energy and the conveying plate (4) is reset.

2. The automatic feeding device for a rotary kiln used in limestone calcination as described in claim 1, characterized in that, The drive mechanism (3) includes: Two drive rollers (301) are rotatably disposed in the mounting cavity (101), and the traction belt (2) is sleeved on the drive rollers (301) and the traction belt (2) is tensioned; A drive motor (302) is mounted on the housing (1). The drive motor (302) is connected to one of the drive rollers (301). The drive mechanism (3) is used to drive the drive roller (301) to rotate and drive the traction belt (2) to rotate.

3. The automatic feeding device for a rotary kiln used in limestone calcination as described in claim 2, characterized in that: The traction belt (2) is a synchronous belt with a toothed structure on its inner side, and the drive roller (301) is a synchronous wheel with a toothed structure on its side wall that is compatible with the synchronous belt.

4. The automatic feeding device for a rotary kiln used in limestone calcination as described in claim 1, characterized in that: The conveyor plate (4) is arranged at an angle, and when the conveyor plate (4) rises, the end of the conveyor plate (4) away from the traction belt (2) is higher than the end of the conveyor plate (4) close to the traction belt (2).

5. The automatic feeding device for a rotary kiln used in limestone calcination as described in claim 4, characterized in that: Multiple sets of hinge blocks (201) are evenly arranged on the outer side of the traction belt (2). Each set of hinge blocks (201) includes two that are spaced apart along the width direction of the traction belt (2). The hinge blocks (201) are provided with hinge holes (202). The top of the conveyor plate (4) is provided with a hinge plate (401). The hinge plate (401) is provided with a hinge shaft (402). The hinge shaft (402) is inserted into the hinge hole (202).

6. The automatic feeding device for a rotary kiln used in limestone calcination as described in claim 5, characterized in that: The hinge block (201) is chamfered at the edge facing the feed plate (4), and the hinge plate (401) is chamfered at the edge.

7. The automatic feeding device for a rotary kiln used in limestone calcination as described in claim 6, characterized in that: The energy storage component is a torsion spring, which is sleeved on the hinge shaft (402). One end of the torsion spring is connected to the hinge block (201), and the other end of the torsion spring is connected to the conveyor plate (4).

8. The automatic feeding device for a rotary kiln used in limestone calcination as described in claim 7, characterized in that: The inner wall of the housing (1) is provided with multiple limiting grooves (104), and the side wall of the conveying plate (4) is provided with multiple limiting rods (403). The limiting rods (403) correspond one-to-one with the limiting grooves (104). The limiting rods (403) are inserted into the limiting grooves (104), and the width of the limiting grooves (104) is equal to the diameter of the limiting rods (403).

9. The automatic feeding device for a rotary kiln used in limestone calcination as described in claim 8, characterized in that: The housing (1) is provided with a flip groove (105), which is located on the housing (1) near the discharge port (103). The width of the flip groove (105) is the same as the width of the mounting cavity (101), and the length of the flip groove (105) is not less than the distance between adjacent conveying plates (4).

10. The automatic feeding device for a rotary kiln used in limestone calcination as described in claim 1, characterized in that: The inner wall of the housing (1) is provided with an elliptical sealing groove, and the two ends of the traction belt (2) are inserted into the sealing groove.

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