Air supply device of rotary kiln

Abstract

The utility model discloses a rotary kiln air supply device which comprises a rotary kiln cylinder body and a plurality of blowpipes penetrating through the rotary kiln cylinder body, the blowpipes are fixedly connected with the rotary kiln cylinder body, and a combined rotary shell is arranged on the outer surface of the rotary kiln cylinder body in a sleeved mode. The movable end of the combined rotary shell is fixedly communicated with two flow dividing pipes, and a plurality of air outlets of the two flow dividing pipes are fixedly communicated with the adjacent air blowing pipes. A gear ring is fixedly connected to the outer surface of the combined rotary shell, and a gear is connected to the outer surface of the gear ring in a meshed mode. According to the utility model, the synchronous operation of the centrifugal fan is realized in a mechanical transmission mode, and the defects of a traditional power supply scheme are effectively overcome. According to the device, a combined rotary shell is arranged on the outer surface of a rotary kiln cylinder, and the rotary power of the rotary kiln is directly transmitted to a centrifugal fan through a planetary gear speed increaser and a synchronous belt transmission assembly by means of meshing transmission of a gear ring and a gear.

Description

Technical Field

[0001] This utility model relates to the field of rotary kiln technology, and in particular to a rotary kiln air supply device. Background Technology

[0002] A rotary kiln is an industrial piece of equipment widely used for processing high-temperature materials. Its main body is a horizontally inclined cylindrical container. During operation, the kiln rotates at a certain speed. Material enters from the high-end feed inlet and, under the influence of gravity and the kiln's rotation, continuously tumbles and moves axially towards the low end, undergoing high-temperature heat treatment in the process. By precisely controlling parameters such as temperature, rotation speed, and inclination angle, various processing methods can be achieved, including drying, calcining, roasting, incineration, or gasification of materials. It is widely used in building materials, metallurgy, chemical industry, and environmental protection.

[0003] Currently, rotary kilns require an air supply device to supplement the kiln space with a certain proportion of combustion air during operation, specifically in the high-temperature reduction section of the rotary kiln.

[0004] The prior art patent disclosure number CN219390461U discloses a kiln back air supply device for a direct reduction rotary kiln, which includes a kiln back fan, a regulating valve, an air duct, a blower pipe, and a blower outlet; the kiln back fan is fixed on the kiln back of the rotary kiln, and the air outlet of the kiln back fan is connected to the inlet end of the air volume regulating valve.

[0005] This device reduces the degree of high-temperature oxidation and wear of the blower duct, but in practical applications, it has been found to have certain drawbacks: because the kiln back fan adopts a multi-unit design and needs to rotate synchronously with the rotary kiln, a large electric slip ring power supply system must be configured to ensure the continuous operation of the fan. This power supply scheme not only requires a high investment in construction costs to purchase high-quality electric slip ring equipment, but also requires regular replacement and maintenance, significantly increasing maintenance costs.

[0006] Therefore, a rotary kiln air supply device is proposed. Utility Model Content

[0007] This utility model is a rotary kiln air supply device proposed to overcome the shortcomings of the existing technology.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a rotary kiln air supply device, comprising a rotary kiln cylinder and a plurality of air blowing pipes that penetrate the rotary kiln cylinder, wherein the air blowing pipes are fixedly connected to the rotary kiln cylinder, and a combined rotating shell is fitted on the outer surface of the rotary kiln cylinder, wherein two diversion pipes are fixedly interconnected at the movable end of the combined rotating shell, and the plurality of air outlets of the two diversion pipes are fixedly interconnected with the adjacent air blowing pipes;

[0009] A gear ring is fixedly connected to the outer surface of the combined rotating housing, and a gear is meshed with the outer surface of the gear ring. A planetary gear speed increaser is provided on one side of the gear, and the input shaft of the planetary gear speed increaser is fixedly connected to the gear.

[0010] A housing is fixedly connected to one side of the planetary gear speed increaser housing. A synchronous belt drive assembly is installed on the housing and the output shaft of the planetary gear speed increaser together. The output end of the synchronous belt drive assembly is provided with a centrifugal fan head section. The input shaft of the centrifugal fan head section is fixedly connected to the output end of the synchronous belt drive assembly. The air outlet of the centrifugal fan head section is fixedly interconnected with the combined rotating housing.

[0011] Furthermore, the combined rotating shell includes two semi-circular inner rings, which are fixedly connected to each other. The outer surfaces of the two semi-circular inner rings are sealed and slidably fitted with two semi-circular shells, which are fixedly connected to each other. Each semi-circular shell is fixedly connected to the air outlet of the centrifugal fan head. This structure adopts a split design, which is convenient for installation and maintenance. At the same time, the sliding sealing cooperation between the semi-circular inner rings and the semi-circular shells ensures the airflow channel sealing when the rotary kiln rotates, avoids gas leakage, and improves air supply efficiency.

[0012] Furthermore, both of the aforementioned diversion pipes include air distribution pipes, and the air distribution pipes are fixedly interconnected with the adjacent semi-circular inner rings. Multiple flange joints are fixedly interconnected on one side of the outer surface of the air distribution pipes, and the flange joints are fixedly interconnected with the adjacent air blowing pipes, which facilitates the entry of air into the air blowing pipes.

[0013] Furthermore, the two toothed rings are composed of two semi-circular ring teeth, and the two semi-circular ring teeth are fixedly connected to the adjacent semi-circular inner ring. The toothed rings are designed as separate units, which facilitates installation.

[0014] Furthermore, the transmission assembly includes a synchronous belt, which is disposed inside the housing. The inner surface of the synchronous belt is meshed with a first synchronous pulley and a second synchronous pulley. The mounting shaft of the first synchronous pulley passes through the housing and is fixedly connected to the output shaft of the planetary gear speed increaser, which can ensure the smoothness of power transmission.

[0015] Furthermore, the mounting shaft of the second synchronous pulley passes through the housing and is fixedly connected to a rotating shaft, which is fixedly connected to the input shaft of the centrifugal fan's head section. This structure ensures that power is transmitted to the centrifugal fan.

[0016] The beneficial effects of this utility model are:

[0017] In use, this utility model discloses a rotary kiln air supply device that achieves synchronous operation of the centrifugal fan through mechanical transmission, effectively solving the shortcomings of traditional power supply schemes. The device features a combined rotating shell on the outer surface of the rotary kiln cylinder and utilizes the meshing of a gear ring and gears to directly transmit the rotary kiln's rotational power to the centrifugal fan via a planetary gear speed increaser and synchronous belt drive assembly. This mechanical linkage structure completely eliminates the need for traditional large electric slip ring power supply systems, significantly reducing equipment procurement costs (eliminating expensive large electric slip ring devices) and the need for periodic slip ring replacement, greatly reducing long-term maintenance costs. Simultaneously, the reasonable speed matching of the planetary gear speed increaser ensures that the centrifugal fan obtains a suitable operating speed, maintaining stable air supply performance. The overall structure adopts a modular design; maintenance only requires disassembling the corresponding semi-circular shell, ensuring the maintainability and operational reliability of the equipment. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 : A partial three-dimensional first-view structural diagram of this utility model;

[0020] Figure 2 : A partial three-dimensional second-view structural diagram of this utility model;

[0021] Figure 3 : Schematic diagram of the arrangement of the rotary kiln shell and the air blowing pipe of this utility model;

[0022] Figure 4 : A cross-sectional view of the outer shell of this utility model.

[0023] The attached figures are labeled as follows:

[0024] 1. Semicircular shell; 2. Air distribution duct; 3. Flange joint; 4. Semicircular inner ring; 5. Gear ring; 6. Gear; 7. Outer shell; 8. Rotating shaft; 9. Planetary gear speed increaser; 10. Head section of centrifugal fan; 11. Air blowing duct; 12. Rotary kiln shell; 13. First synchronous pulley; 14. Synchronous belt; 15. Second synchronous pulley. Detailed Implementation

[0025] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figures 1 to 4 As shown, a rotary kiln air supply device is disclosed, including a rotary kiln body 12 and a plurality of air blowing pipes 11 that penetrate the rotary kiln body 12, and the air blowing pipes 11 are fixedly connected to the rotary kiln body 12. The number of air blowing pipes 11 can be selected according to actual needs.

[0027] The outer surface of the rotary kiln shell 12 is fitted with a combined rotating shell, which includes two semi-circular inner rings 4, which are fixedly connected to each other. The outer surfaces of the two semi-circular inner rings 4 are sealed and slidably fitted with two semi-circular shells 1, which are fixedly connected to each other. After the two semi-circular inner rings 4 are spliced, they are locked and fixed by multiple bolts and nuts, which facilitates disassembly and replacement. A sealing gasket is provided at the splice to ensure airtightness. After the two semi-circular shells 1 are spliced, they are also locked and fixed by multiple bolts and nuts, which facilitates disassembly and replacement. A sealing gasket is provided at the splice to ensure airtightness. The semi-circular shells 1 and the semi-circular inner rings 4 are rotated and sealed by a sealing ring.

[0028] The movable end of the combined rotating housing is fixedly connected to two diversion pipes. Multiple air outlets of the two diversion pipes are fixedly connected to the adjacent air blowing pipe 11. Both diversion pipes include an air distribution pipe 2, and the air distribution pipe 2 is fixedly connected to the adjacent semi-circular inner ring 4. Multiple flange joints 3 are fixedly connected to one side of the outer surface of the air distribution pipe 2, and the flange joints 3 are fixedly connected to the adjacent air blowing pipe 11. The flange joints 3 are fixed to the flanges of the air blowing pipe 11 by bolts and nuts, which facilitates disassembly and assembly. A sealing gasket is provided at the connection to ensure sealing.

[0029] A gear ring 5 is fixedly connected to the outer surface of the combined rotating housing. The two gear rings 5 ​​are composed of two semi-circular ring teeth, and the two semi-circular ring teeth are fixedly connected to the adjacent semi-circular inner ring 4. A gear 6 is meshed with the outer surface of the gear ring 5. A planetary gear speed increaser 9 is provided on one side of the gear 6. The input shaft of the planetary gear speed increaser 9 is fixedly connected to the gear 6. The planetary gear speed increaser 9 is a device that uses a planetary gear mechanism to achieve speed increase. The planetary gear speed increaser 9 is mainly composed of a sun gear, a planet carrier, a gear ring, and planetary gears.

[0030] A housing 7 is fixedly connected to one side of the planetary gear speed increaser 9. A synchronous belt drive assembly is mounted on both the housing 7 and the output shaft of the planetary gear speed increaser 9. The output end of the synchronous belt drive assembly has a centrifugal fan head section 10, and the input shaft of the centrifugal fan head section 10 is fixedly connected to the output end of the synchronous belt drive assembly. A single semi-circular shell 1 is fixedly connected to the air outlet of the centrifugal fan head section 10. The drive assembly includes a synchronous belt 14, which is located inside the housing 7. A first synchronous pulley 13 and a second synchronous pulley 15 are meshed on the inner surface of the synchronous belt 14. The mounting shaft passes through the housing 7 and is fixedly connected to the output shaft of the planetary gear speed increaser 9. The mounting shaft of the first synchronous pulley 13 is rotatably connected to the housing 7 through a bearing housing. The inner ring of the bearing inside the bearing housing is fixedly connected to the mounting shaft. The housing body is fixedly connected to the housing 7. The mounting shaft of the second synchronous pulley 15 passes through the housing 7 and is fixedly connected to a rotating shaft 8. The rotating shaft 8 is fixedly connected to the input shaft of the centrifugal fan head section 10. The mounting shaft of the second synchronous pulley 15 is rotatably connected to the housing 7 through a bearing housing. The inner ring of the bearing inside the bearing housing is fixedly connected to the mounting shaft. The housing body is fixedly connected to the housing 7.

[0031] Working principle: The centrifugal fan head 10, outer casing 7, and two semi-circular shells 1 are all fixed to the bracket or cement block on which the rotary kiln is installed by mounting base.

[0032] During rotary kiln operation, the rotary kiln cylinder 12 rotates, and the rotary kiln cylinder 12 drives the two semi-circular inner rings 4 to rotate through the air blowing pipe 11 and the diversion pipe. The semi-circular inner rings 4 drive the gear ring 5 to rotate, and the gear ring 5 drives the input shaft of the planetary gear speed increaser 9 to rotate through the gear 6. After the planetary gear speed increaser 9 reasonably increases the speed, it drives the first synchronous pulley 13 to rotate through its output shaft, and drives the second synchronous pulley 15 to rotate through the synchronous belt 14. Finally, it drives the centrifugal fan head section 10 to operate through the rotating shaft 8. The airflow generated by the centrifugal fan head section 10 enters the two air distribution pipes 2 through the combined rotating shell. After being distributed by the air distribution pipes 2, it is evenly delivered to each air blowing pipe 11 through multiple flange joints 3.

[0033] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A rotary kiln air supply device, comprising a rotary kiln shell (12) and a plurality of air pipes (11) penetrating the rotary kiln shell (12), wherein the air pipes (11) are fixedly connected to the rotary kiln shell (12), characterized in that: The outer surface of the rotary kiln body (12) is fitted with a combined rotating shell. The movable end of the combined rotating shell is fixedly connected to two diversion pipes. Multiple air outlets of the two diversion pipes are fixedly connected to the adjacent air blowing pipe (11). A gear ring (5) is fixedly connected to the outer surface of the combined rotating housing. A gear (6) is meshed with the outer surface of the gear ring (5). A planetary gear speed increaser (9) is provided on one side of the gear (6). The input shaft of the planetary gear speed increaser (9) is fixedly connected to the gear (6). The planetary gear speed increaser (9) has a housing (7) fixedly connected to one side of its housing. The housing (7) and the output shaft of the planetary gear speed increaser (9) are jointly equipped with a synchronous belt drive assembly. The output end of the synchronous belt drive assembly is provided with a centrifugal fan head part (10). The input shaft of the centrifugal fan head part (10) is fixedly connected to the output end of the synchronous belt drive assembly. The air outlet of the centrifugal fan head part (10) is fixedly connected to the combined rotating housing.

2. The rotary kiln air supply device according to claim 1, characterized in that: The combined rotating housing includes two semi-circular inner rings (4), which are fixedly connected to each other. The outer surfaces of the two semi-circular inner rings (4) are sealed and slidably fitted with two semi-circular shells (1), which are fixedly connected to each other. Each semi-circular shell (1) is fixedly connected to the air outlet of the head part (10) of the centrifugal fan.

3. The rotary kiln air supply device according to claim 1, characterized in that: Both of the aforementioned distribution pipes include a distribution pipe (2), and the distribution pipe (2) is fixedly connected to the adjacent semi-circular inner ring (4). A plurality of flange joints (3) are fixedly connected to one side of the outer surface of the distribution pipe (2), and the flange joints (3) are fixedly connected to the adjacent blowing pipe (11).

4. The rotary kiln air supply device according to claim 2, characterized in that: The two toothed rings (5) are composed of two semi-circular ring teeth, and the two semi-circular ring teeth are fixedly connected to the adjacent semi-circular inner ring (4).

5. The rotary kiln air supply device according to claim 1, characterized in that: The transmission assembly includes a synchronous belt (14), which is disposed inside the housing (7). The inner surface of the synchronous belt (14) is meshed with a first synchronous pulley (13) and a second synchronous pulley (15). The mounting shaft of the first synchronous pulley (13) passes through the housing (7) and is fixedly connected to the output shaft of the planetary gear speed increaser (9).

6. The rotary kiln air supply device according to claim 5, characterized in that: The mounting shaft of the second synchronous pulley (15) passes through the housing (7) and is fixedly connected to a rotating shaft (8), and the rotating shaft (8) is fixedly connected to the input shaft of the head part (10) of the centrifugal fan.

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