Automatic unblocking device for rotary kiln

Abstract

The utility model discloses an automatic unblocking device for a rotary kiln, and belongs to the technical field of rotary kiln equipment. The unblocking device comprises a rotary kiln, an unblocking mechanism and a kiln tail cover installed at the tail of the rotary kiln, and a discharging port is formed in the lower side of the kiln tail cover. The unblocking mechanism comprises a mounting frame, a fixed shaft and a chain; the installation frame is fixedly installed on the inner side wall of the rotary kiln, one end of the fixing shaft is fixedly connected with the installation frame, the other end of the fixing shaft extends out of the rotary kiln, and the connecting point of the fixing shaft and the installation frame deviates from the axis of the rotary kiln. And one end of the chain is mounted on the fixed shaft, and the other end of the chain extends to the discharge hole. The unblocking device does not need to be controlled by a motor or a hydraulic device, the unblocking work can be synchronously carried out on the discharge port part, which is seriously blocked, of the rotary kiln in the working state of the rotary kiln, and the production efficiency of the rotary kiln is ensured while unblocking is realized.

Description

Technical Field

[0001] This utility model belongs to the technical field of rotary kiln equipment, and more specifically, relates to an automatic unblocking device for rotary kilns. Background Technology

[0002] Rotary kilns are widely used in industrial production for processes such as calcination and roasting of materials. However, during the operation of a rotary kiln, materials undergo a series of physical and chemical changes in the high-temperature environment inside the kiln, easily leading to blockages such as scaling, agglomeration, and bridging at the kiln outlet and other locations. This severely affects the normal operation and production efficiency of the rotary kiln. Traditional cleaning methods often require manual operation, which is not only labor-intensive and inefficient, but also poses significant safety hazards when performed manually in a high-temperature environment. Currently, some rotary kiln cleaning devices have emerged on the market to address blockages such as scaling, agglomeration, and bridging inside rotary kilns.

[0003] For example, Chinese patent application number CN202410206133.8, published on April 30, 2024, discloses a robot for cleaning scale buildup in a rotary kiln's decomposition furnace, relating to the field of scale cleaning technology in decomposition furnaces. This robot includes a stepper motor and a plate on one side; a pre-cleaning device, configured to insert into the scale buildup along the furnace wall under pneumatic and thrust action to remove the layered scale, with one side of the pre-cleaning device connected to the rotating part of the stepper motor; and a fixed-point cleaning device, configured to determine the location of residual scale buildup on the furnace wall by capturing an image of the pre-cleaned furnace wall and cleaning it at that location, with the side of the horizontal plate near the plate connected to the side of the fixed-point cleaning device away from the plate. This robot for cleaning scale buildup in a rotary kiln's decomposition furnace achieves rapid cleaning of the scale surface and scale buildup through the pre-cleaning device, improving cleaning efficiency, and improves cleaning accuracy by locating and cleaning residual scale through the fixed-point cleaning device.

[0004] For example, Chinese patent application number CN202410364499.8, published on May 28, 2024, discloses a limestone rotary kiln ring-cleaning device, relating to the field of rotary kiln technology. It includes two sets of movable adjustment mechanisms and several sets of hydraulic breakers. Each set of movable adjustment mechanisms is equipped with two sets of moving wheel assemblies, which are used to adjust the opening and closing angle of the two sets of moving wheel assemblies. This invention discloses a limestone rotary kiln ring-cleaning device that uses an expansion mechanism to drive several hydraulic breakers to expand together, thereby bringing them into contact with the rings on the inner wall of the rotary kiln. The vibration of the hydraulic breakers breaks the rings. Multiple sets of hydraulic breakers effectively improve the breaking effect. Simultaneously, the moving wheel assemblies can drive the entire device to move circumferentially along the inner wall of the rotary kiln at a certain angle, allowing the multiple sets of hydraulic breakers to more comprehensively clean the rings on the inner wall of the rotary kiln. The overall cleaning efficiency of the device is effectively improved, and no manual entry into the kiln is required, ensuring safety.

[0005] Both of the above solutions address the blockage issue inside the rotary kiln by incorporating corresponding cleaning equipment. However, similar to commercially available rotary kiln cleaning equipment, they require motors or hydraulic systems to control the cleaning process and cannot be performed while the rotary kiln is operating; cleaning must be initiated only after the kiln has stopped. When using this equipment, after a period of operation, the discharge port often becomes blocked due to bridging and other issues, necessitating a shutdown to allow the cleaning equipment to clear the blockage, thus impacting the rotary kiln's production efficiency. Furthermore, conventional hydraulic systems or motors are susceptible to damage in high-temperature environments, requiring a cooling period before resuming operation, further increasing the cleaning time. Summary of the Invention

[0006] 1. The problem to be solved

[0007] To address the problem that existing rotary kiln unblocking equipment is unable to perform synchronous unblocking while the rotary kiln is in operation, thus affecting the production efficiency of the rotary kiln, this utility model provides an automatic rotary kiln unblocking device. It does not require control by a motor or hydraulic device and can simultaneously unblock the severely blocked discharge port of the rotary kiln while it is in operation, thus achieving unblocking while ensuring the production efficiency of the rotary kiln.

[0008] 2. Technical Solution

[0009] To solve the above problems, the present invention adopts the following technical solution.

[0010] An automatic unblocking device for a rotary kiln includes a rotary kiln, an unblocking mechanism, and a kiln tail hood installed at the tail of the rotary kiln. The kiln tail hood has a discharge port on its lower side. The unblocking mechanism includes a mounting frame, a fixed shaft, and a chain. The mounting frame is fixedly installed on the inner wall of the rotary kiln. One end of the fixed shaft is fixedly connected to the mounting frame, and the other end extends out of the rotary kiln. The connection point between the fixed shaft and the mounting frame is offset from the axis of the rotary kiln. One end of the chain is installed on the fixed shaft, and the other end extends to the discharge port.

[0011] As a further improvement to the technical solution, the chain includes a lifting ring and a circular chain. The lifting ring is sleeved on a fixed shaft, and the upper end of the circular chain is connected to the lifting ring, forming a chain of multiple interlocking circular rings.

[0012] As a further improvement to the technical solution, the ring is elliptical, and adjacent rings are connected by their minor axis.

[0013] As a further improvement to the technical solution, the number of rings is 8-15.

[0014] As a further improvement to the technical solution, the fixed shaft is provided with an annular groove, and the lifting ring is sleeved in the annular groove.

[0015] As a further improvement to the technical solution, a pair of limiting plates are fixedly installed on the fixed shaft, and the lifting ring is sleeved on the fixed shaft between the pair of limiting plates.

[0016] As a further improvement to the technical solution, the fixed shaft is set horizontally.

[0017] As a further improvement to the technical solution, the discharge port gradually decreases in size from top to bottom.

[0018] As a further improvement to the technical solution, the mounting bracket is made of a high-temperature alloy.

[0019] As a further improvement to the technical solution, the chain is made of a high-temperature alloy.

[0020] 3. Beneficial effects

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] (1) This utility model provides an automatic unblocking device for rotary kilns. By installing a chain that extends to the discharge port at a position off the axis of the rotary kiln, the chain will reciprocate up, down, left, and right under the action of the eccentric installation when the rotary kiln is rotating. During the movement, the chain will continuously hit the kiln tail wall and the material accumulated at the discharge port, thereby loosening and falling off the material, achieving the effect of unblocking. This solution can achieve unblocking without an external power source and can perform unblocking work at the discharge port in real time when the rotary kiln is working, without stopping the rotary kiln production, thus ensuring the production efficiency of the rotary kiln.

[0023] (2) The present invention provides an automatic unblocking device for rotary kilns, which uses a chain formed by multiple interlocking elliptical rings, and the adjacent two rings are connected by the short diameter, which shortens the distance between the rings and the side wall of the discharge port, increases the frequency of contact between the chain and the accumulated material, and improves the unblocking effect.

[0024] (3) The present invention provides an automatic unblocking device for a rotary kiln, wherein the lifting ring is sleeved between an annular groove of a certain length or a pair of limiting plates, so that it can slide a certain distance on the fixed shaft, thereby increasing the unblocking working range of the chain. Attached Figure Description

[0025] Figure 1 This is a side view of the structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0027] In the diagram: 1. Rotary kiln; 2. Kiln tail hood; 3. Discharge port; 4. Mounting frame; 5. Fixed shaft; 6. Chain; 7. Lifting ring; 8. Circular ring; 9. Limiting plate. Detailed Implementation

[0028] Exemplary embodiments of the present invention are described in detail below. While these exemplary embodiments have been described in sufficient detail to enable those skilled in the art to practice the present invention, it should be understood that other embodiments may be implemented and various changes may be made to the present invention without departing from its spirit and scope. The more detailed description of embodiments of the present invention below is not intended to limit the scope of the claimed invention, but is merely illustrative and does not limit the description of the features and characteristics of the invention, in order to provide the best mode for carrying out the invention and sufficient to enable those skilled in the art to practice it. Therefore, the scope of the present invention is defined only by the appended claims.

[0029] Example 1

[0030] An automatic unblocking device for rotary kilns is disclosed, which is used to clear material blockages at the discharge port of rotary kilns, thereby preventing material accumulation from affecting the operation of the rotary kilns. Its specific structure and technical effects are described in detail below.

[0031] like Figure 1 and Figure 2 As shown, the unblocking device includes a rotary kiln 1, an unblocking mechanism, and a kiln tail cover 2 installed at the tail of the rotary kiln 1. The lower side of the kiln tail cover 2 has a discharge port 3. In this embodiment, the discharge port 3 gradually decreases in size from top to bottom to ensure that the material can fall accurately into the next device.

[0032] The unblocking mechanism includes a mounting frame 4, a fixed shaft 5, and a chain 6. The mounting frame 4 is fixedly mounted on the inner wall of the rotary kiln 1. One end of the fixed shaft 5 is fixedly connected to the mounting frame 4, and the other end extends out of the rotary kiln 1. The connection point between the fixed shaft 5 and the mounting frame 4 is offset from the axis of the rotary kiln 1. One end of the chain 6 is mounted on the fixed shaft 5, and the other end extends to the discharge port 3. In this embodiment, the fixed shaft 5 is horizontally positioned to facilitate installation and ensure the unblocking effect. The mounting frame 4 and the chain 6 are made of a high-temperature alloy that will not be damaged under the high-temperature operating environment of the rotary kiln.

[0033] The chain 6 includes a hanging ring 7 and a circular chain. The hanging ring is sleeved on the fixed shaft 5, and the upper end of the circular chain is connected to the hanging ring 7. It is formed by multiple interlocking circular rings 8. Specifically, the circular rings 8 are elliptical, and adjacent circular rings 8 are connected by their minor axis. The number of circular rings is generally 8-15, and there are 10 in this embodiment.

[0034] By installing a chain 6 extending to the discharge port 3 at a position offset from the axis of the rotary kiln 1, the chain 6 will reciprocate up, down, left, and right under the effect of its eccentric installation when the rotary kiln 1 is rotating. During the movement, the chain 6 will continuously impact the kiln tail wall and the material accumulated at the discharge port 3, thereby loosening and dislodging the material, achieving the effect of clearing blockages. This solution can achieve blockage clearing without an external power source and can perform blockage clearing work at the discharge port 3 in real time while the rotary kiln 1 is working, without stopping the rotary kiln 1, thus ensuring the production efficiency of the rotary kiln 1. Furthermore, the use of a chain formed by multiple interlocking elliptical rings, with adjacent rings 8 connected by their short diameter, shortens the distance between the rings 8 and the side wall of the discharge port 3, increases the frequency of contact between the chain 6 and the accumulated material, and improves the blockage clearing effect.

[0035] It is worth mentioning that, in order to improve the unblocking range of the chain, the chain 6 needs to be able to slide a certain distance on the fixed shaft 5. Specifically, the following two structural designs can be adopted. The first is to open an annular groove of a certain length on the fixed shaft 5, and the lifting ring 7 is sleeved in the annular groove. The second is to fix a pair of limiting plates 9 on the fixed shaft 5, and the lifting ring 7 is sleeved on the fixed shaft 5 between the pair of limiting plates 9. This embodiment adopts the second scheme, and the chain 6 can slide on the fixed shaft between the pair of limiting plates 8 along with the lifting ring 7.

[0036] In summary, the rotary kiln automatic unblocking device of this embodiment does not require control by a motor or hydraulic device. It can simultaneously unblock the discharge port of the rotary kiln when the rotary kiln is in operation, so as to achieve unblocking while ensuring the production efficiency of the rotary kiln.

Claims

1. An automatic unblocking device for a rotary kiln, comprising a rotary kiln (1) and a kiln tail cover (2) installed at the tail of the rotary kiln (1), wherein the lower side of the kiln tail cover (2) has a discharge port (3), characterized in that: It also includes a blockage clearing mechanism; the blockage clearing mechanism includes a mounting frame (4), a fixed shaft (5) and a chain (6); the mounting frame (4) is fixedly installed on the inner side wall of the rotary kiln (1), one end of the fixed shaft (5) is fixedly connected to the mounting frame (4), and the other end extends out of the rotary kiln (1), and the connection point between the fixed shaft (5) and the mounting frame (4) is offset from the axis of the rotary kiln (1); one end of the chain (6) is installed on the fixed shaft (5), and the other end extends to the discharge port (3).

2. The rotary kiln automatic unblocking device according to claim 1, characterized in that: The chain (6) includes a hanging ring (7) and a circular chain. The hanging ring is sleeved on a fixed shaft (5), and the upper end of the circular chain is connected to the hanging ring (7). It is formed by multiple circular rings (8) interlocking together.

3. The rotary kiln automatic unblocking device according to claim 2, characterized in that: The ring (8) is elliptical, and two adjacent rings (8) are connected by their minor axis.

4. The rotary kiln automatic unblocking device according to claim 3, characterized in that: The number of the rings (8) is 8-15.

5. The rotary kiln automatic unblocking device according to claim 2, characterized in that: The fixed shaft (5) has an annular groove, and the lifting ring (7) is fitted into the annular groove.

6. The rotary kiln automatic unblocking device according to claim 2, characterized in that: A pair of limiting plates (9) are fixedly installed on the fixed shaft (5), and the lifting ring (7) is sleeved on the fixed shaft (5) between the pair of limiting plates (9).

7. An automatic unblocking device for a rotary kiln according to any one of claims 1-6, characterized in that: The fixed shaft (5) is set horizontally.

8. An automatic unblocking device for a rotary kiln according to any one of claims 1-6, characterized in that: The opening of the discharge port (3) gradually decreases from top to bottom.

9. An automatic unblocking device for a rotary kiln according to any one of claims 1-6, characterized in that: The mounting bracket (4) is made of high-temperature alloy.

10. An automatic unblocking device for a rotary kiln according to any one of claims 1-6, characterized in that: The chain (6) is made of high-temperature alloy.

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