A rotary kiln coal powder feeding structure for cement production

Abstract

The utility model relates to cement production equipment technical field, concretely is a kind of rotary kiln pulverized coal feeding structure for cement production, including base, base is equipped with control machine case, conveying table and the universal bottom wheel with lock dead structure;The conveying belt of conveying table is equipped with paddle, and discharge end is connected discharge box, and the lower end of discharge box is slidably connected adapter box, and the side of adapter box is equipped with toothed plate, and the bottom end first motor output circular gear of the positioning frame side of discharge box is engaged with toothed plate, and the bottom end of adapter box is connected detachable discharge cylinder through annular positioning plate and screw, and inside is fixed box through support rod, and the rotation of rotating shaft in box is rotated through locating bearing, and upper and lower end feeding screw rod is inserted discharge box and discharge cylinder respectively, and rotating shaft is equipped with driven bevel gear, and the driving bevel gear of the drive shaft of the second motor output end side of adapter box is engaged with it, realize accurate feeding, reduce dust raising, improve efficiency.

Description

Technical Field

[0001] This utility model relates to the field of cement production equipment technology, specifically to a pulverized coal feeding structure for a rotary kiln used in cement production. Background Technology

[0002] The rotary kiln used in cement production is the core equipment for cement clinker calcination and is known as the "heart of the cement plant". Its main function is to calcine cement raw materials (made from limestone, clay, iron powder and other materials mixed in proportion) into clinker at high temperature, laying the foundation for subsequent cement grinding.

[0003] The stability of the pulverized coal feed in a rotary kiln directly affects its calcination efficiency and production environment. Traditional pulverized coal feed is mostly transported by conveyor belts, and its discharge port is usually suspended above the rotary kiln feed port, forming a certain drop. Because pulverized coal is lightweight and highly fluid, it is easy to generate a large amount of dust during the falling process due to airflow disturbance and drop impact. This not only leads to waste of raw materials, but also pollutes the workshop environment and increases the health risks of workers such as pneumoconiosis. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a pulverized coal feeding structure for a rotary kiln used in cement production.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a pulverized coal feeding structure for a rotary kiln in cement production, comprising a base, a control box and a conveyor platform at the upper end of the base, a conveyor belt on the conveyor platform, multiple paddles on the conveyor belt, a discharge box at the discharge end of the conveyor platform, a transfer box at the lower end of the discharge box, the discharge box being inserted into the transfer box and slidably connected to the discharge box, a positioning frame fixedly mounted on one side of the discharge box, a toothed plate fixedly mounted on one side of the transfer box, a first motor at the bottom end of the positioning frame, and a circular gear located on one side of the toothed plate and meshing with the toothed plate at the output end of the first motor;

[0008] The bottom of the adapter box is equipped with a detachable discharge cylinder.

[0009] To facilitate the overall movement of this structure, the following improvements are made to this utility model: the lower end of the base is provided with multiple casters, all of which are universal casters and have their own locking structure.

[0010] To facilitate the replacement of the discharge cylinder, the present invention includes an improvement in that the top of the discharge cylinder is provided with an annular positioning plate, which is fixed to the lower end of the adapter box by screws.

[0011] To improve the material discharge process, the present invention includes the following improvements: A housing is fixedly installed inside the transfer box, and a vertically rotating shaft is installed inside the housing. The lower end of the shaft has a feeding screw that penetrates the discharge cylinder. A driven bevel gear is located in the middle of the shaft. A second motor is fixedly installed on one side of the transfer box. The output end of the second motor has a drive shaft that penetrates the transfer box and inserts into the housing. One end of the drive shaft has a drive bevel gear that meshes with the driven bevel gear. Positioning bearings are embedded at the upper and lower ends of the housing. Both ends of the shaft pass through the positioning bearings and are rotatably connected to the housing. The upper end of the shaft also has a feeding screw inserted into the discharge box. The housing is fixed inside the transfer box by support rods. One end of each support rod is fixed to the inner wall of the transfer box with screws. The number of support rods is not mandatory and can be three.

[0012] (III) Beneficial Effects

[0013] Compared with the prior art, this utility model provides a pulverized coal feeding structure for a rotary kiln in cement production, which has the following beneficial effects:

[0014] The sliding connection between the transfer box and the discharge box, together with the first motor, circular gear and toothed plate, can precisely adjust the height of the discharge cylinder, so that the discharge cylinder can be accurately inserted into the rotary kiln feed port. This eliminates the drop problem of the traditional feeding structure and reduces dust generated by airflow disturbance and drop impact during the pulverized coal falling process. This not only avoids raw material waste, but also improves the workshop environment and reduces the health risks to workers.

[0015] The feeding screw can effectively promote the flow of pulverized coal in the discharge box and discharge cylinder, prevent pulverized coal blockage, ensure continuous and smooth discharge, further improve the stability of the feeding system, and ensure the stability of rotary kiln calcination efficiency in cement production. Attached Figure Description

[0016] Figure 1 This is a first-view perspective three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a second-view three-dimensional structural diagram of the present invention;

[0018] Figure 3 This is a third-view three-dimensional structural diagram of the present invention;

[0019] Figure 4 This is a schematic diagram of the meshing structure between the drive bevel gear and the driven bevel gear in this utility model.

[0020] In the diagram: 1. Base; 2. Bottom wheel; 3. Control box; 4. Conveyor table; 5. Conveyor belt; 6. Paddle; 7. Discharge box; 8. Transfer box; 9. Discharge cylinder; 10. Positioning frame; 11. First motor; 12. Circular gear; 13. Gear plate; 14. Housing; 15. Rotating shaft; 16. Feeding screw; 17. Driven bevel gear; 18. Second motor; 19. Drive bevel gear. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-4 This utility model discloses a pulverized coal feeding structure for a rotary kiln in cement production, comprising a base 1, a control box 3 and a conveyor platform 4 at the upper end of the base 1, a conveyor belt 5 on the conveyor platform 4, a plurality of paddles 6 on the conveyor belt 5, a discharge box 7 at the discharge end of the conveyor platform 4, a transfer box 8 at the lower end of the discharge box 7, the discharge box 7 being inserted into the transfer box 8 and the transfer box 8 being slidably connected to the discharge box 7, a positioning frame 10 being fixedly installed on one side of the discharge box 7, a toothed plate 13 being fixedly installed on one side of the transfer box 8, a first motor 11 at the bottom end of the positioning frame 10, and a circular gear 12 located on one side of the toothed plate 13 and meshing with the toothed plate 13 at the output end of the first motor 11.

[0023] The bottom of the adapter box 8 is equipped with a detachable discharge cylinder 9.

[0024] The lower end of the base 1 is provided with multiple bottom wheels 2, all of which are universal wheels and have their own locking structure.

[0025] When using the pulverized coal feeding structure of the rotary kiln for cement production, the entire device can first be moved using the multiple bottom wheels 2 at the lower end of the base 1. The bottom wheels 2 are universal wheels with a built-in locking structure. After moving to the appropriate position, the bottom wheels 2 are locked to fix the device.

[0026] Next, the conveyor platform 4 is started by controlling the control box 3. The conveyor belt 5 on the conveyor platform 4 starts to run, and the multiple paddles 6 on the conveyor belt 5 rotate accordingly, conveying the coal powder material from low to high, and finally conveying the coal powder to the discharge box 7 at the discharge end of the conveyor platform 4.

[0027] Then, the first motor 11 at the bottom of the positioning frame 10 is started. The output end of the first motor 11 drives the circular gear 12 to rotate. Since the circular gear 12 meshes with the toothed plate 13 fixed on one side of the transfer box 8, the rotation of the circular gear 12 will drive the transfer box 8 to slide down along the discharge box 7 until the detachable discharge cylinder 9 at the bottom of the transfer box 8 is inserted into the feed port of the rotary kiln equipment.

[0028] The top of the discharge cylinder 9 is provided with an annular positioning plate, which is fixed to the lower end of the adapter box 8 by screws.

[0029] The annular positioning plate at the top of the discharge cylinder 9 is fixed to the lower end of the adapter box 8 with screws, ensuring the stable connection of the discharge cylinder 9 during movement, and facilitating the temporary replacement of discharge cylinders 9 with different diameters.

[0030] The adapter box 8 has a fixed housing 14 inside, and a vertically rotating shaft 15 is installed inside the housing 14. The lower end of the shaft 15 has a feeding screw 16 that passes through the discharge cylinder 9. A driven bevel gear 17 is located in the middle of the shaft 15. A second motor 18 is fixedly installed on one side of the adapter box 8. The output end of the second motor 18 has a drive shaft that passes through the adapter box 8 and inserts into the housing 14. One end of the drive shaft has a drive bevel gear 19 that meshes with the driven bevel gear 17. The upper end of the housing 14... The lower end is inlaid with positioning bearings, and both ends of the rotating shaft 15 pass through the positioning bearings and are rotatably connected to the housing 14. The upper end of the rotating shaft 15 is also provided with a feeding screw 16 that is inserted into the discharge box 7. The housing 14 is fixed inside the transfer box 8 by support rods. One end of the support rod is fixed to the inner wall of the transfer box 8 by screws. There is no mandatory requirement for the number of support rods, and there can be three. The support rods are evenly distributed between the housing 14 and the inner wall of the transfer box 8 to ensure support stability.

[0031] Finally, the second motor 18 on one side of the adapter box 8 is started. The output end of the second motor 18 drives the drive shaft to rotate, and the drive bevel gear 19 at one end of the drive shaft rotates accordingly. Since the drive bevel gear 19 meshes with the driven bevel gear 17 in the middle part of the rotating shaft 15, the rotating shaft 15 is driven to rotate inside the box 14.

[0032] The housing 14 is fixed inside the transfer box 8 by a support rod. One end of the support rod is fixed to the inner wall of the transfer box 8 with screws, providing stable support for the housing 14. The positioning bearings embedded at the upper and lower ends of the housing 14 make the rotation of the rotating shaft 15 more stable. The feeding screws 16 at the upper and lower ends of the rotating shaft 15 are respectively inserted into the discharge box 7 and the discharge cylinder 9. The feeding screws 16 rotate with the rotating shaft 15, smoothly conveying the coal powder in the discharge box 7 to the discharge cylinder 9, and finally into the rotary kiln, ensuring that the entire discharge process is smooth.

[0033] In the coal powder conveying process, multiple paddles 6 on the conveyor belt 5 can effectively push the coal powder, prevent the coal powder from slipping during the conveying process, and ensure that the coal powder is stably conveyed to the discharge box 7.

[0034] The discharge cylinder 9 is connected to the adapter box 8 via an annular positioning plate and screws, realizing a detachable design. This makes it easy to replace the appropriate discharge cylinder 9 according to different rotary kiln feed port specifications, allowing the outer wall of the discharge cylinder 9 to fit more precisely with the inner wall of the rotary kiln feed port, thus enhancing the versatility of the device.

[0035] The housing 14 is securely installed inside the transfer box 8 under the fixation of the support rod. The positioning bearing ensures the stability of the rotation of the rotating shaft 15. The second motor 18 drives the rotating shaft 15 and the feeding screw 16 to rotate through the drive shaft, drive bevel gear 19, and driven bevel gear 17. The feeding screw 16 can effectively push the coal powder to flow in the discharge box 7 and discharge cylinder 9, prevent coal powder blockage, ensure continuous and smooth discharge, further improve the stability of the feeding system, and ensure the stability of the rotary kiln calcination efficiency in cement production. The drive shaft is rotatably connected to the transfer box 8 and the housing 14 through the bearing.

[0036] Model 11 of the first motor: A Y-series three-phase asynchronous motor, such as Y100L-2, can be selected. This model of motor features simple structure, reliable operation, and convenient maintenance, and is suitable for the power requirements of adjusting the height of the transfer box 8 in this feeding structure.

[0037] Parameters: Rated power is 3kW, rated speed is 2880r / min. Its high speed, through the meshing of the circular gear 12 and the toothed plate 13, quickly and smoothly drives the transfer box 8 to slide along the discharge box 7, meeting the speed requirements for accurately inserting the discharge cylinder 9 into the rotary kiln feed inlet. The rated voltage is 380V, adaptable to most industrial power environments, ensuring stable operation.

[0038] For the second motor (model 18), a Y132M-4 three-phase asynchronous motor is most suitable. This model of motor is widely used in industrial transmissions and can provide stable power for the rotation of the feeding screw 16, ensuring smooth material discharge.

[0039] Specifications: Rated power is 7.5kW. This relatively high power output overcomes the resistance encountered by the feeding screw 16 in pushing pulverized coal, ensuring efficient feeding. Rated speed is 1440r / min. Through the drive shaft, drive bevel gear 19, and driven bevel gear 17, the speed can be appropriately matched to the rotating shaft 15 and the feeding screw 16, achieving stable and suitable speed pushing of pulverized coal. Rated voltage is also 380V, conforming to industrial power standards.

[0040] Control Chassis Model 3: A Siemens S7-200SMART series PLC control chassis 3 can be used. This series of control chassis 3 is widely used in industrial automation control, has reliable performance, and can meet the control requirements of the pulverized coal feeding structure of the rotary kiln used in cement production.

[0041] Control Principle: The control chassis 3 uses an internal programmable logic controller (PLC) to automate the entire feeding structure. First, the operator can input relevant commands through the human-machine interface (HMI) of the control chassis 3, such as starting the conveyor 4, adjusting the operating status of the first motor 11 and the second motor 18, etc. After receiving these commands, the PLC performs logical operations and processes them according to its pre-written program.

[0042] In the description herein, it should be noted that relational terms such as "first" and "second" are used merely 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 process, method, article, or apparatus.

[0043] 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.

Claims

1. A pulverized coal feeding structure for a rotary kiln in cement production, comprising a base (1), wherein a control box (3) and a conveyor platform (4) are provided at the upper end of the base (1), a conveyor belt (5) is provided on the conveyor platform (4), and a plurality of paddles (6) are provided on the conveyor belt (5), characterized in that: The discharge end of the conveyor (4) is provided with a discharge box (7), and the lower end of the discharge box (7) is provided with a transfer box (8). The discharge box (7) is inserted into the transfer box (8) and the transfer box (8) is slidably connected to the discharge box (7). A positioning frame (10) is fixedly provided on one side of the discharge box (7), and a toothed plate (13) is fixedly provided on one side of the transfer box (8). A first motor (11) is provided at the bottom of the positioning frame (10), and a circular gear (12) located on one side of the toothed plate (13) and meshing with the toothed plate (13) is provided at the output end of the first motor (11). The bottom of the adapter box (8) is provided with a detachable discharge cylinder (9).

2. The pulverized coal feeding structure for a rotary kiln in cement production according to claim 1, characterized in that: The lower end of the base (1) is provided with multiple bottom wheels (2), all of which are universal wheels and have their own locking structure.

3. The pulverized coal feeding structure for a rotary kiln in cement production according to claim 2, characterized in that: The top of the discharge cylinder (9) is provided with an annular positioning plate, which is fixed to the lower end of the adapter box (8) by screws.

4. The pulverized coal feeding structure for a rotary kiln in cement production according to claim 3, characterized in that: The adapter box (8) is fixedly equipped with a box body (14). A rotating shaft (15) is vertically rotatable inside the box body (14). The lower end of the rotating shaft (15) is provided with a feeding screw (16) that passes through the discharge cylinder (9). The middle part of the rotating shaft (15) is provided with a driven bevel gear (17). A second motor (18) is fixedly equipped on one side of the adapter box (8). The output end of the second motor (18) is provided with a drive shaft that passes through the adapter box (8) and is inserted into the box body (14). One end of the drive shaft is provided with a drive bevel gear (19) that meshes with the driven bevel gear (17).

5. The pulverized coal feeding structure for a rotary kiln in cement production according to claim 4, characterized in that: The upper and lower ends of the housing (14) are inlaid with positioning bearings. The two ends of the rotating shaft (15) pass through the positioning bearings and are rotatably connected to the housing (14). The upper end of the rotating shaft (15) is also provided with a feeding screw (16) that is inserted into the discharge box (7).

6. The pulverized coal feeding structure for a rotary kiln in cement production according to claim 5, characterized in that: The housing (14) is fixed inside the adapter box (8) by a support rod, and one end of the support rod is fixed to the inner wall of the adapter box (8) by screws.

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