A calcium aluminate calcining rotary kiln regulating device

Abstract

The utility model discloses a kind of calcium aluminate calcination rotary kiln regulating device, belong to calcined material flow control technical field.The regulating device includes square chute, square chute one end is connected with bin outlet, the other end is connected with rotary kiln inlet by bolt nut connection circular conversion pipe to connect circular material pipe, eliminate right-angle corner and block material;In square chute, two material plates adopt the way of motor drive and hand wheel drive combination, rotate synchronously by gear transmission mechanism and regulate material passage, wherein, the meshing of worm and worm wheel in gear transmission mechanism has self-locking characteristic, prevent valve plate from rotating and leaking after closing, ensure the amount of calcium aluminate entering calcining kiln under various working conditions is stable.At the same time, also increase including baffle, rib, channel steel, protective cover and other structure design, to improve the overall stability and safety of device, ensure that material does not leak and block in conveying process, prolong the service life of equipment.

Description

Technical Field

[0001] This utility model belongs to the field of calcined material flow control technology, specifically relating to a flow rate adjustment device for a rotary kiln for calcium aluminate calcination. Background Technology

[0002] In the calcium aluminate calcination production process, the quality of the refined calcium aluminate slag is crucial to the performance of subsequent products such as high-alumina cement and steelmaking slag removers. Therefore, the amount of calcium aluminate used in calcination directly affects the sufficiency of the calcination reaction and the phase composition of the product: insufficient dosage can easily lead to incomplete reaction, resulting in excessive unreacted raw materials remaining in the product, reducing product purity and activity; excessive dosage can trigger the formation of non-target phases, damaging the product's performance stability and thus affecting its effectiveness in subsequent applications.

[0003] Currently, calcium aluminate is typically conveyed from the silo via a square chute. Due to the right-angled corners of the square chute, calcium aluminate tends to accumulate and adhere to the walls at these corners during transport. This is especially problematic when the calcium aluminate has a high moisture content or uneven particle size, easily leading to reduced material conveying efficiency and chute blockage. Furthermore, existing production processes typically use slide gate valves to control the amount of calcium aluminate conveyed. However, these valves have a planar design and rely on manual adjustment of the opening. Because of the uneven particle size of the calcium aluminate, the valve plate is difficult to close tightly in a timely manner. Sometimes, material leakage occurs due to valve plate jamming, making precise control of the calcium aluminate dosage impossible. This results in significant fluctuations in the amount of calcium aluminate entering the calcining kiln, affecting the stability of the calcination reaction.

[0004] Therefore, improving the square chute can effectively solve problems such as material accumulation, wall adhesion, poor sealing of the slide valve, and low adjustment accuracy, thereby achieving precise and stable control of the amount of calcium aluminate used and ensuring the consistency of calcined product quality. This is of great technical significance for optimizing the calcium aluminate calcination process and improving production efficiency. Utility Model Content

[0005] In view of the many problems existing in the chute structure and gate valve in the calcium aluminate calcination production process, this utility model provides a rotary kiln regulating device for calcium aluminate calcination.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a rotary kiln flow rate regulating device for calcium aluminate calcination, comprising a square chute, one end of which is connected to the outlet of the silo, and the other end of which is connected to a circular conversion pipe via bolts and nuts. The circular conversion pipe is used to connect the square chute to the circular material pipe. Two material plates are rotatably connected inside the square chute. The two material plates rotate synchronously through a gear transmission mechanism to open or close the material channel. The gear transmission mechanism is located outside the square chute and is driven by a motor or handwheel to regulate the material flow rate.

[0007] As a further supplement to the above technical solution, a baffle plate is fixedly connected inside the square chute. The baffle plate extends along the rotation axis of the material plate and is located directly above the two material plates. Opening channels are left on both sides of the baffle plate and the inner wall of the square chute.

[0008] As a further explanation and limitation of the above technical solution, the baffle plate is arched, and its two edges are aligned with the rotation axis of the material plate.

[0009] As a further explanation and limitation of the above technical solution, the surface of the material plate is arc-shaped, and the highest point of its arc is aligned with the arch apex of the baffle plate.

[0010] As a further supplement to the above technical solution, at least two stiffening plates are respectively provided on the outer walls of the left and right sides of the square chute, and channel steel is fixedly connected to the stiffening plates for installing the square chute.

[0011] As a further explanation and limitation of the above technical solution, the gear transmission mechanism includes two first driven gears and a first driving gear meshing with them. The worm gear and the first driving gear are coaxially mounted on the mounting plate. The mounting plate is fixed on the square chute. The rotating shafts of the two material plates pass through the mounting plate and are respectively mounted with the first driven gears. The worm is mounted on the mounting plate through two bearing supports and meshes with the worm gear. The motor and the handwheel drive the worm to achieve synchronous rotation of the material plates through gear meshing transmission.

[0012] As a further supplement to the above technical solution, the gear transmission mechanism also includes a second driven gear and a second driving gear meshing with it. The second driven gear is coaxially connected to the worm gear, and the second driving gear is mounted on the output shaft of the motor. The motor is fixed to the mounting plate by a support.

[0013] As a further explanation and limitation of the above technical solution, the handwheel is connected to either end of the worm gear.

[0014] As a further explanation of the above technical solution, a protective cover is provided on the mounting plate to protect the gear transmission mechanism and motor from external dust and impact damage.

[0015] As a further explanation of the above technical solution, an observation window and heat dissipation holes are provided on the protective cover.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. This utility model controls the opening and closing of the material channel by synchronously rotating two material plates through a gear transmission mechanism, replacing the traditional slide gate valve. The meshing of the worm gear and worm wheel has a self-locking characteristic, preventing the valve plate from rotating due to material pressure, thus solving the problems of poor sealing, material leakage, and low adjustment accuracy of the original slide gate valve. Furthermore, the combination of motor drive and handwheel drive allows for emergency adjustment via the handwheel in case of motor failure, and also allows the valve plate's operating status to be judged by handwheel rotation. This ensures a stable amount of calcium aluminate entering the calcining kiln under various operating conditions, guaranteeing the sufficiency of the calcination reaction and the stability of the product phase composition.

[0018] 2. This utility model, by setting a circular conversion tube, smoothly connects the square chute and the circular material pipe, eliminating the right-angle corner structure of the original square chute. This fundamentally avoids the problems of calcium aluminate accumulation, wall hanging and blockage caused by corners during the conveying process, ensuring the smoothness of material conveying.

[0019] 3. The arched baffle plate added above the two material plates in this invention can evenly distribute the material above the two material plates, avoiding uneven wear caused by concentrated material impact on one side of the material plate. In addition, the design of the arched baffle plate also reduces the direct impact of material on the material plates, extends the service life of the material plates, and reduces maintenance costs.

[0020] 4. This utility model incorporates a protective cover design, which can effectively block external dust from entering the gear transmission mechanism, preventing gear damage due to material jamming, and also avoid damage to the gear transmission mechanism and motor caused by external impacts; at the same time, the observation window facilitates real-time observation of the gear transmission status, and the heat dissipation holes can dissipate the heat generated during operation in a timely manner, extending the service life of the equipment and reducing maintenance costs.

[0021] 5. This utility model uses stiffening plates and channel steel to fix and install the square chute, which enhances the overall stability of the device and adapts to different production and installation scenarios. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the regulating device for the rotary kiln used in the calcination of calcium aluminate in this utility model.

[0023] Figure 2 This is an assembly diagram of the square chute and the adjustment mechanism in this utility model.

[0024] Figure 3 This is a top view of the integral chute portion of the present invention.

[0025] Figure 4 for Figure 3 A cross-sectional view of the AA plane;

[0026] Figure 5 for Figure 2Enlarged view of part A of the medium gear transmission mechanism.

[0027] In the diagram: 1 is the square chute, 2 is the round conversion tube, 3 is the bolt and nut, 4 is the motor, 5 is the handwheel, 6 is the protective cover, 601 is the observation window, 602 is the heat dissipation hole, 7 is the valve plate, 8 is the baffle plate, 9 is the stiffening plate, 10 is the channel steel, 11 is the mounting plate, and 12 is the gear transmission mechanism.

[0028] The gear transmission mechanism includes the following specific components: the first driven gear is 1201, the first driving gear is 1202, the worm gear is 1203, the worm is 1204, the bearing support is 1205, the second driven gear is 1206, the second driving gear is 1207, and the support is 1208. Detailed Implementation

[0029] To further illustrate the technical solution of this utility model, the following description is in conjunction with the appendix. Figure 1-5 We will further illustrate this utility model through four embodiments based on the specific implementation and modification process. Example 1

[0030] like Figures 1 to 5As shown, a motor-controlled rotary kiln feed rate adjustment device for calcium aluminate calcination includes a square chute 1 and a circular conversion pipe 2. The circular conversion pipe 2 is designed and custom-made according to the original dimensions of the square chute 1. One end of the square chute 1 is connected to the outlet flange of the silo, and the other end of the square chute 1 is connected to the flange at one end of the circular conversion pipe 2 via bolts and nuts 3. The flange at the other end of the circular conversion pipe 2 is connected to the circular feed pipe and docked with the inlet flange of the rotary kiln. The entire device achieves a smooth connection, eliminates right-angle corners, and avoids material accumulation. The main design modifications are as follows: Two valve plates 7 are rotatably connected inside the square chute 1. The rotating shafts of the two valve plates 7 are horizontal and parallel, and their rotating shafts extend to the outside and are fixed to the first driven gear 1201 by a key connection. The first driving gear 1202 and the worm gear 1203 are rotatably connected to the mounting plate 11 through the same shaft, and the first driving gear 1202 is located between the two first driven gears 1201 and meshes with them simultaneously. The worm 1204 is fixed to the mounting plate 11 by two bearing supports 1205 and meshes with the worm gear 1203. The second driven gear 1206 is fixed to one end of the worm 1204 by a key connection. The second driving gear 1207 is fixed to the output shaft of the motor 4 by a key connection and meshes with the second driven gear 1206. The motor 4 is fixed to the mounting plate 11 by bolts through the support 1208. The outer side of the square chute 1 is welded to the mounting plate 11. In this embodiment, motor 4 is a servo motor of model 110ST-M04030. The servo motor driver is connected to the P model S7-1200LC control module. A laser flow sensor of model LDM30 is installed at the bottom of the square chute 1. The sensor signal is connected to the PLC to form a closed-loop control: when the sensor detects that the flow rate deviates from the set value, the PLC outputs a signal to control the motor 4 to rotate in both directions. The valve plate 7 is driven to rotate synchronously through the gear transmission mechanism 12 to realize automatic flow regulation.

[0031] Furthermore, two stiffening plates 9 are welded to the outer walls on the left and right sides of the square chute 1, and channel steel 10 is fixedly connected to the stiffening plates 9 by bolts. The channel steel 10 is used to fix the entire device to the frame. Example 2

[0032] Based on Example 1, a handwheel drive structure is added. (See attached diagram) Figure 5As shown, the specific solution is as follows: one end of the worm gear 1204 is connected to the handwheel 5 via a key, and the other end is fixed to the mounting plate 11 via a bearing support 1205. In actual use, if the motor 4 malfunctions and emergency adjustment is required, we rotate the handwheel 5 to drive the worm gear 1204 to rotate. The worm gear 1204 meshes with the worm wheel 1203, driving the first driving gear 1202 to rotate, which in turn drives the two valve plates 7 to open and close synchronously through the first driven gear 1201. Because the meshing of the worm gear 1204 and the worm wheel 1203 has a self-locking characteristic, after the handwheel 5 stops rotating, the valve plates 7 can stably maintain the current opening degree, avoiding positional displacement due to material pressure. Example 3

[0033] In embodiments 1 and 2 above, by adding a protective cover, we can effectively prevent calcium aluminate dust from entering the gear transmission mechanism 12 and causing it to jam, while also preventing external impacts from damaging the gears. (See attached...) Figure 2 As shown, the specific solution is as follows: The protective cover 6 is welded from Q235 steel plate and fixed to the mounting plate 11 with bolts, covering the gear transmission mechanism 12 and the handwheel 5. An observation window 601 is provided on the front of the protective cover 6, and a heat dissipation hole 602 is provided on the side. The observation window 601 facilitates real-time observation of the gear meshing status and the position of the valve plate 7 shaft; the heat dissipation hole 602 allows for natural ventilation, reducing the heat accumulation generated by the gear transmission. Example 4

[0034] Because the impact force of calcium aluminate material falling from the silo is relatively large, this design avoids the deformation caused by excessive localized stress on traditional flat baffles. (See attached image) Figure 4 As shown, in the above implementation, we adopted the following two improvement measures: First, an arched baffle plate 8 was added. The arched structure can effectively disperse the impact force and reduce local stress concentration. The baffle plate 8 is welded and fixed inside the square chute 1, and is located directly above the two valve plates 7. The baffle plate 8 extends along the rotation axis of the valve plate 7, and its two sides form symmetrical opening channels with the inner wall of the square chute 1, which can evenly distribute the material to the two valve plates 7, preventing uneven wear caused by concentrated material impact on one side of the valve plate 7. Second, the surface of the valve plate 7 is provided with an arc-shaped structure, and the highest point of its arc is aligned with the arched edge of the baffle plate 8. That is, the two edges of the baffle plate 8 are simultaneously aligned with the rotation axis of the valve plate 7. The alignment of the edges of the baffle plate 8 with the rotation axis of the valve plate 7 and the matching of the arc surface with the arc of the valve plate 7 can reduce material leakage from the gap between the two and improve the flow control accuracy.

[0035] Its main working principle is as follows: After the calcium aluminate material is output from the silo, it first enters the square chute 1, and is diverted by the baffle plate 8 to the open channels on both sides, flowing evenly to the adjustment area between the two valve plates 7. The PLC controls the servo motor 4 to operate according to the flow sensor signal, which drives the worm gear 1204 through the second drive gear 1207 and the second driven gear 1206. The worm gear 1204 meshes with the worm wheel 1203 to drive the first drive gear 1202, which in turn drives the two first driven gears 1201 to rotate synchronously in opposite directions, thereby realizing the automatic adjustment of the valve plate 7 opening. If the motor 4 malfunctions, the worm gear 1204 can also be driven by turning the handwheel 5, and then the valve plate 7 opening can be manually adjusted through the transmission of the worm wheel 1203, the first drive gear 1202, and the first driven gear 1201. Throughout the adjustment process, the self-locking characteristic of the worm gear and worm wheel ensures a stable opening and avoids malfunctions caused by material pressure.

[0036] The foregoing has shown and described the main features and advantages of this utility model. It will be apparent to those skilled in the art that the specific embodiments of this utility model are not limited to the details of the exemplary embodiments described above. Furthermore, without departing from the spirit or essential characteristics of this utility model, the inventive concept and design ideas of this utility model can be implemented in other specific forms, and these should be equivalently included within the protection scope disclosed in the technical solution of this utility model. Therefore, in all respects, the embodiments should be considered exemplary and non-limiting. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included within this utility model.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A calcium aluminate calcining rotary kiln regulating device comprising a square chute (1), characterized in that: One end of the square chute (1) is connected to the outlet of the silo, and the other end is connected to the circular conversion pipe (2) by bolts and nuts (3). The circular conversion pipe (2) is used to connect the square chute (1) to the circular material pipe. Two valve plates (7) are rotatably connected inside the square chute (1). The two valve plates (7) are synchronously rotated to open or close the material channel through a gear transmission mechanism (12). The gear transmission mechanism (12) is located outside the square chute (1) and is driven by a motor (4) or a handwheel (5) to regulate the material flow.

2. The calcium aluminate calcining rotary kiln modulating device of claim 1, wherein: A baffle plate (8) is fixedly connected inside the square chute (1). The baffle plate (8) extends along the rotation axis of the valve plate (7) and is located directly above the two valve plates (7). Opening channels are left on both sides of the baffle plate (8) and the inner wall of the square chute (1).

3. The calcium aluminate calcining rotary kiln modulating device of claim 2, wherein: The baffle plate (8) is arched, and its two edges are aligned with the pivot of the valve plate (7).

4. The calcium aluminate calcining rotary kiln modulating device of claim 3, wherein: The surface of the valve plate (7) is arc-shaped, and the highest point of its arc is aligned with the arched apex of the baffle plate (8).

5. A flow rate regulating device for a rotary kiln for calcium aluminate calcination according to any one of claims 1 to 4, characterized in that: At least two stiffening plates (9) are respectively provided on the outer walls of the left and right sides of the square chute (1), and channel steel (10) is fixedly connected to the stiffening plates (9) for installing the square chute (1).

6. The flow rate regulating device for a rotary kiln for calcium aluminate calcination according to claim 5, characterized in that: The gear transmission mechanism (12) includes two first driven gears (1201) and a first driving gear (1202) meshing with both. The worm gear (1203) and the first driving gear (1202) are coaxially mounted on the mounting plate (11). The mounting plate (11) is fixed on the square chute (1). The rotating shafts of the two valve plates (7) pass through the mounting plate (11) and are respectively mounted with the first driven gears (1201). The worm (1204) is mounted on the mounting plate (11) through two bearing supports (1205) and meshes with the worm gear (1203). The motor (4) and the handwheel (5) drive the worm (1204) to achieve synchronous rotation of the valve plates (7) by using gear meshing transmission.

7. The flow rate regulating device for a rotary kiln for calcium aluminate calcination according to claim 6, characterized in that: The gear transmission mechanism (12) further includes a second driven gear (1206) and a second driving gear (1207) meshing with it. The second driven gear (1206) is coaxially connected with the worm (1204). The second driving gear (1207) is mounted on the output shaft of the motor (4). The motor (4) is fixed on the mounting plate (11) by a support (1208) and drives the worm (1204) through gear meshing.

8. The flow rate regulating device for a rotary kiln for calcium aluminate calcination according to claim 6, characterized in that: The handwheel (5) is connected to either end of the worm (1204).

9. A flow rate regulating device for a rotary kiln for calcium aluminate calcination according to claim 7 or 8, characterized in that: A protective cover (6) is provided on the mounting plate (11) to protect the gear transmission mechanism (12) and the motor (4) from external dust and impact damage.

10. The flow rate regulating device for a rotary kiln for calcium aluminate calcination according to claim 9, characterized in that: An observation window (601) and a heat dissipation hole (602) are provided on the protective cover (6).

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