Multi-head airflow classifier
The multi-head airflow classifier solves the problems of low classification accuracy and efficiency of traditional classifiers through the design of multiple classification devices and material dispersion and buffer devices, achieving high-efficiency classification and extending equipment life.
Patent Information
- Application Number
- CN202520484028.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-03-19
AI Technical Summary
Traditional single-head air classifiers have low classification accuracy, low classification output and low classification efficiency, making them difficult to meet the classification needs of high-hardness and large-particle materials.
The multi-head airflow classifier is equipped with multiple classification devices, material dispersion devices, and material buffer devices. Combined with the air supply structure, it achieves efficient material separation through multiple collisions of materials and the centrifugal force of the classification impeller.
It improves grading accuracy and efficiency, extends the service life of the equipment, and meets the grading requirements of different materials.
Smart Images
Figure CN223931984U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of airflow classifier technology, specifically to a multi-head airflow classifier. Background Technology
[0002] An air classifier is an air classifying device that, together with a cyclone separator, dust collector, and induced draft fan, forms a classification system capable of effectively classifying powdery materials. After classification, fine particles that meet the particle size requirements are discharged through the fine powder outlet, while coarse particles are discharged through the coarse powder outlet. Currently, air classifiers are widely used in various fields.
[0003] However, traditional air classifiers are generally single-head air classifiers, which have disadvantages such as low classification accuracy, low classification output and efficiency, and poor control of large particles. They are not suitable for classifying materials with high hardness, high specific gravity and coarseness, thus causing trouble for micro powder manufacturers. Utility Model Content
[0004] In view of the above-mentioned defects in the existing technology, the present invention aims to provide a multi-head airflow classifier that can meet the needs of different materials and greatly improve the classification accuracy, classification output and classification efficiency.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0006] A multi-head airflow classifier includes a body, multiple classifying devices, a material dispersing device, and a material buffering device. A fine powder discharge pipe is coaxially mounted on the top of the body, a coarse powder discharge valve is mounted on the bottom of the body, and a material inlet is located on the side of the body. All the classifying devices are mounted on the body and arranged in a circular array around the axis of the body, surrounding the fine powder discharge pipe. The material dispersing devices are located within the body corresponding to the material inlet, and each device has a vertically penetrating internal cavity. The material inlet communicates with the internal cavity of the material dispersing device. The material buffering device is located within the body and between the classifying devices and the material dispersing device. A makeup air structure is also provided on the body.
[0007] The grading device includes a power unit disposed outside the machine body and a grading impeller disposed on the power unit and located inside the machine body. A fine powder feed pipe perpendicular to the axis of the fine powder discharge pipe is disposed on the side of the fine powder discharge pipe. The grading impeller corresponds to the fine powder feed pipe and the two are coaxially arranged.
[0008] The machine body is provided with a bearing housing, and the power unit includes a motor mounted on the machine body and a drive shaft rotatably mounted in the bearing housing. One end of the drive shaft extends into the machine body and is connected to the staged impeller, and the other end of the drive shaft extends out of the bearing housing and is connected to the motor for transmission.
[0009] The bearing housing is provided with a cooling water jacket for cooling the drive shaft.
[0010] The grading impeller includes an upper grading disc and a lower grading disc spaced apart, a plurality of grading blades inclinedly disposed between the upper and lower grading discs, and a bushing disposed on the upper grading disc and located between the upper and lower grading discs. The upper grading disc, the lower grading disc, and the bushing are coaxially arranged. All the grading blades are arranged in a circular array with the axes of the upper grading disc, the lower grading disc, and the bushing as the central axis. The bushing is located inside all the grading blades and connected to the drive shaft.
[0011] The air supply structure includes a first air supply structure, which includes an air supply sleeve fitted outside the fine powder discharge pipe and the fine powder inlet pipe. An air flow channel is formed between the air supply sleeve and the fine powder discharge pipe and the fine powder inlet pipe. One end of the air supply sleeve extends out of the machine body, and a first air inlet communicating with the outside and the air flow channel is provided on the extended end of the air supply sleeve. The air outlet end of the air supply sleeve is fitted outside the inlet end of the fine powder inlet pipe, and a labyrinth air outlet structure is provided between the inlet end of the fine powder inlet pipe, the air outlet end of the air supply sleeve, and the classifying impeller.
[0012] The material dispersing device includes a frustum-shaped material dispersing cylinder and a material guide shroud. The frustum-shaped material dispersing cylinder is coaxially disposed on the inner wall of the machine body, and the material guide shroud is disposed below the frustum-shaped material dispersing cylinder.
[0013] The material guide hood includes an upper guide plate and a lower guide plate coaxially arranged with the frustum-shaped material distribution cylinder, and a plurality of guide blades inclinedly arranged between the upper guide plate and the lower guide plate. All the guide blades are arranged in a circular array with the axis of the upper guide plate and the lower guide plate as the central axis.
[0014] The material buffer device includes a conical buffer cylinder, which is located at the lower end of the fine powder discharge pipe.
[0015] The air supply structure further includes a second air supply structure and a third air supply structure. The second air supply structure is disposed on the machine body corresponding to the frustum-shaped material cylinder, and the third air supply structure is disposed on the machine body and located between the material inlet and the coarse powder discharge valve.
[0016] By adopting the above technical solution, the beneficial effects of this utility model are:
[0017] The multi-head airflow classifier provided by this utility model employs multiple classification devices, and simultaneously incorporates a material dispersion device and a material buffer device within the machine body. When material enters the material dispersion device through the material inlet, it is impacted and diffused upon contact with the inner wall of the dispersion device. Under the suction force of the induced draft fan, the material moves at high speed with the rising airflow, and is buffered and diverted by the material buffer device to reach the classification zone. Under the powerful centrifugal force of each high-speed rotating classification device, the coarse and fine particles of the material are separated. Fine particles that meet the particle size requirements are discharged through the fine powder outlet pipe via the classification device. Coarse particles, carrying some fine particles, collide with the wall and descend along the inner wall of the machine body into the material dispersion device. The material dispersion device and the air supply structure further separate the coarse and fine particles. The fine particles rise to the classification zone for secondary classification, while the coarse particles descend to the coarse powder outlet. The material is discharged at the discharge valve. Throughout the material classification process, the material dispersion device disperses the material and controls the output, overcoming the shortcomings of traditional air classifiers where, when classifying high-hardness, high-density, and coarse materials, the material accumulates due to gravity and falls directly from the inner wall of the machine to the coarse powder discharge valve for unloading. This improves the classification accuracy and output. The material buffer device controls the gas and material flow rate within the machine, buffering and dispersing the impact force of the material to prevent wear on the classification device and the machine body, thus extending their service life. The multiple classification devices allow the material to collide with them multiple times, preventing material accumulation in localized areas and further improving classification accuracy and efficiency. In summary, compared with traditional air classifiers, this multi-head air classifier can meet the needs of different materials and significantly improves classification accuracy, output, and efficiency. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of the multi-head airflow classifier of this utility model;
[0019] Figure 2 yes Figure 1 Schematic diagram of the structure of a mid-stage impeller;
[0020] Figure 3 yes Figure 2 Sectional view;
[0021] Figure 4 yes Figure 1 Schematic diagram of the material guide shroud;
[0022] Figure 5 yes Figure 4 A sectional view;
[0023] Figure 6 yes Figure 1 Enlarged view of section A;
[0024] In the diagram: 1. Machine body; 11. Upper cylinder; 12. Lower cylinder; 13. Support leg; 2. Grading device; 21. Bearing housing; 22. Motor; 23. Drive shaft; 24. Grading impeller; 241. Upper grading disc; 242. Lower grading disc; 2421. Annular boss; 243. Grading blades; 244. Bushing; 25. Belt drive mechanism; 26. Cooling water jacket; 3. Material dispersion device; 31. Frustum-shaped material dispersing cylinder; 32. Material guide hood; 321 1. Upper guide plate; 322. Lower guide plate; 323. Guide vane; 4. Material buffer device; 5. Fine powder discharge pipe; 51. Fine powder inlet pipe; 6. Coarse powder discharge valve; 7. Feed pipe; 8. First air supply structure; 81. Air supply sleeve; 811. First air inlet; 82. First labyrinth plate; 821. First air outlet; 83. Second labyrinth plate; 831. Annular air outlet groove; 832. Second air outlet; 9. Second air supply structure; 10. Third air supply structure. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and are not intended to limit this utility model.
[0026] like Figures 1 to 6 As shown, this embodiment discloses a multi-head airflow classifier, including a body 1, multiple classifying devices 2, a material dispersing device 3, and a material buffering device 4. A fine powder discharge pipe 5 is coaxially arranged on the top of the body 1, a coarse powder discharge valve 6 is arranged on the bottom of the body 1, and a material inlet is arranged on the side of the body 1, with a feed pipe 7 at the material inlet. All classifying devices 2 are arranged on the body 1 and are arranged in a circular array around the fine powder discharge pipe 5 with the axis of the body 1 as the central axis. The material dispersing devices 3 are arranged inside the body 1 corresponding to the material inlet, and the material dispersing devices 3 have an internal cavity that runs vertically through the body, and the material inlet is connected to the internal cavity of the material dispersing devices 3. The material buffering device 4 is arranged inside the body 1 and is located between the classifying devices 2 and the material dispersing devices 3. A makeup air structure is also provided on the body 1.
[0027] In this embodiment, the multi-head airflow classifier employs multiple classifying devices 2, and simultaneously incorporates a material dispersing device 3 and a material buffering device 4 within the machine body 1. When material enters the material dispersing device 3 through the material inlet, it is impacted and diffused upon contact with the inner wall of the material dispersing device 3. Under the suction force of the induced draft fan, the material moves at high speed with the rising airflow. After being buffered and diverted by the material buffering device 4, it reaches the classification zone. Under the powerful centrifugal force of each high-speed rotating classifying device 2, the coarse and fine particles of the material are separated. Fine particles that meet the particle size requirements are discharged through the fine powder discharge pipe 5 via the classifying device 2. Coarse particles, carrying some fine particles, collide with the wall and descend along the inner wall of the machine body 1 into the material dispersing device 3. The material dispersing device 3 and the air supply structure further separate the coarse and fine particles. The fine particles rise to the classification zone for secondary classification, while the coarse particles descend to the coarse powder discharge pipe. The material is discharged at valve 6. Throughout the material classification process, the material dispersion device 3 plays a role in dispersing the material and controlling the output, thereby overcoming the defect of traditional air classifiers when classifying high-hardness, high-density, and coarse materials, where the material falls directly from the inner wall of the machine body 1 to the coarse powder discharge valve 6 due to gravity accumulation. This improves the classification accuracy and output. The material buffer device 4 controls the gas and material flow rate inside the machine body 1, buffers and disperses the impact force of the material to prevent material from wearing down the classification device 2 and the machine body 1, thereby extending the service life of the classification device 2 and the machine body 1. The setting of multiple classification devices 2 allows the material to collide with the classification device 2 multiple times, avoiding the accumulation of material in local areas, thereby improving the classification accuracy and efficiency.
[0028] In this embodiment, the machine body 1 includes an upper cylinder 11 and a lower cylinder 12. Both the upper cylinder 11 and the lower cylinder 12 include a cylindrical section and a conical section. The conical section of the upper cylinder 11 and the cylindrical section of the lower cylinder 12 are connected by a flange. The fine powder discharge pipe 5 is coaxially arranged at the upper end of the cylindrical section of the upper cylinder 11, and the material inlet is located on the conical section of the upper cylinder 11. A support leg 13 is provided at one end of the cylindrical section of the upper cylinder 11 near the conical section. A coarse powder discharge port is provided at the lower end of the conical section of the lower cylinder 12, and a coarse powder discharge valve 6 is located on the conical section of the lower cylinder 12 corresponding to the coarse powder discharge port. This arrangement facilitates the assembly and transportation of the entire equipment. Of course, the machine body 1 can also adopt other structures, depending on the actual situation. This embodiment does not limit this.
[0029] The grading device 2 in this embodiment includes a power unit disposed outside the machine body 1 and a grading impeller 24 disposed on the power unit and located inside the machine body 1. A fine powder discharge pipe 5 has a fine powder inlet pipe 51 perpendicular to its axis on its side. The grading impeller 24 corresponds to the fine powder inlet pipe 51 and the two are coaxially arranged.
[0030] Specifically, the machine body 1 is provided with a bearing seat 21, and the power unit includes a motor 22 provided on the machine body 1 and a transmission shaft 23 rotatably provided in the bearing seat 21. One end of the transmission shaft 23 extends into the machine body 1 and is connected to the classifier impeller 24, and the other end of the transmission shaft 23 extends out of the bearing seat 21 and is connected to the motor 22 for transmission.
[0031] Because the belt drive mechanism 25 provides smooth transmission, has good flexibility and elasticity, and can absorb and distribute the impact force generated during transmission, it operates smoothly and with low noise, making it suitable for transmission applications with a large center distance between the two shafts. Therefore, in this embodiment, the drive shaft 23 and the motor 22 are preferably connected by the belt drive mechanism 25. Of course, the drive shaft 23 and the motor 22 can also be connected by a gear drive mechanism or a chain drive mechanism, depending on the actual needs. This embodiment does not impose any restrictions on this.
[0032] In order to improve transmission efficiency and extend the service life of transmission shaft 23, this embodiment provides a cooling water jacket 26 on bearing housing 21 for cooling transmission shaft 23. The cooling water jacket 26 is provided with water inlet and water outlet.
[0033] The grading impeller 24 in this embodiment includes an upper grading disk 241 and a lower grading disk 242 spaced apart, a plurality of grading blades 243 inclinedly disposed between the upper grading disk 241 and the lower grading disk 242, and a bushing 244 disposed on the upper grading disk 241 and located between the upper grading disk 241 and the lower grading disk 242. The upper grading disk 241, the lower grading disk 242 and the bushing 244 are coaxially arranged. All the grading blades 243 are arranged in a circular array with the axis of the upper grading disk 241, the lower grading disk 242 and the bushing 244 as the central axis. The bushing 244 is located inside all the grading blades 243 and connected to the drive shaft 23.
[0034] In this embodiment, the tilt angle α of the grading blade 243 is 25°. In practical applications, the tilt angle of the grading blade 243 can be set according to the particle size requirements of the material. This embodiment does not impose any restrictions on this.
[0035] During material classification, motor 22 drives transmission shaft 23 to rotate at high speed, thereby driving classification impeller 24 to rotate at high speed. Under the strong centrifugal force of each high-speed rotating classification impeller 24, the coarse and fine particles of the material arriving at the classification zone are separated. Fine particles that meet the particle size requirements enter the fine powder feed pipe 51 through the gap between the classification blades 243 of the classification impeller 24, and are then discharged through the fine powder discharge pipe 5. Coarse particles, carrying some fine particles, collide with the wall and descend along the inner wall of the machine body 1 into the material dispersion device 3. The material dispersion device 3 and the air supply structure separate the coarse and fine particles again. The fine particles rise to the classification zone for secondary classification, while the coarse particles descend to the coarse powder discharge valve for discharge.
[0036] The air supply structure in this embodiment includes a first air supply structure 8, which includes an air supply sleeve 81 fitted around the fine powder discharge pipe 5 and the fine powder inlet pipe 51. An airflow channel is formed between the air supply sleeve 81 and the fine powder discharge pipe 5 and the fine powder inlet pipe 51. One end of the air supply sleeve 81 extends out of the upper cylinder 11 of the machine body 1, and a first air inlet 811 connecting the outside to the airflow channel is provided on the extended end of the air supply sleeve 81. The air outlet end of the air supply sleeve 81 is fitted around the inlet end of the fine powder inlet pipe 51. A labyrinth air outlet structure is provided between the inlet end of the fine powder inlet pipe 51, the air outlet end of the air supply sleeve 81, and the classifying impeller 24. By setting the first air supply structure 8, the airflow balance within the machine body 1 is ensured, resulting in more stable particle size classification of the material.
[0037] Specifically, the labyrinth air outlet structure includes a first labyrinth disk 82 welded to the inlet end of the fine powder feed pipe 51 and the outlet end of the air supply sleeve 81, and a second labyrinth disk 83 fixed to the first labyrinth disk 82 by screws. The first labyrinth disk 82 is provided with a first air outlet 821, and the second labyrinth disk 83 is provided with an annular air outlet groove 831. The bottom of the annular air outlet groove 831 is provided with a second air outlet 832 penetrating the second labyrinth disk 83. The lower classifying disk 242 of the classifying impeller 24 is coaxially provided with an annular boss 2421, which is rotatably disposed in the corresponding annular air outlet groove 831. During air supply, the airflow flows into the airflow channel through the first air inlet 811, and then flows into the inner cavity of the machine body 1 in sequence through the first air outlet 821, the second air outlet 832, and the annular air outlet groove 831.
[0038] The material dispersing device 3 in this embodiment includes a frustum-shaped material dispersing cylinder 31 and a material guide hood 32. The frustum-shaped material dispersing cylinder 31 is coaxially arranged on the inner wall of the machine body 1, and the material guide hood 32 is arranged below the frustum-shaped material dispersing cylinder 31.
[0039] Specifically, the frustum-shaped bulk material cylinder 31 is disposed on the conical section of the upper cylinder 11, with the larger end of the frustum-shaped bulk material cylinder 31 at the top and the smaller end at the bottom, and the material guide hood 32 is disposed on the smaller end of the frustum-shaped bulk material cylinder 31.
[0040] In this embodiment, the material guide hood 32 includes an upper guide plate 321 and a lower guide plate 322 coaxially arranged with the frustum-shaped material cylinder 31, and a plurality of guide blades 323 inclinedly arranged between the upper guide plate 321 and the lower guide plate 322. All guide blades 323 are arranged in a circular array with the axis of the upper guide plate 321 and the lower guide plate 322 as the central axis. The upper guide plate 321 is fixedly arranged on the small opening end of the frustum-shaped material cylinder 31.
[0041] In this embodiment, the tilt angle b of the guide vane 323 is 48°. In practical applications, the tilt angle of the guide vane 323 can be set according to the particle size requirements of the material. This embodiment does not impose any restrictions on this.
[0042] The material buffer device 4 in this embodiment includes a conical buffer cylinder, which is located at the lower end of the fine powder discharge pipe 5. Specifically, the wider end of the conical buffer cylinder is at the top, and the pointed end is at the bottom.
[0043] The air supply structure in this embodiment also includes a second air supply structure 9 and a third air supply structure 10. The second air supply structure 9 is disposed on the conical section of the upper cylinder 11 of the machine body 1, corresponding to the frustum-shaped material distribution cylinder 31. The third air supply structure 10 is disposed on the machine body 1 and located between the material inlet and the coarse powder discharge valve 6. Specifically, the third air supply structure 10 is disposed on the upper conical section of the lower cylinder 12 of the machine body 1.
[0044] In this embodiment, the second air supply structure 9 and the third air supply structure 10 are both existing technologies. Their function is to increase the air intake and further separate coarse and fine particles to improve the classification accuracy and efficiency. The specific structure will not be described in detail here. In actual operation, coarse particles, carrying some fine particles, collide with the wall and descend along the inner wall of the machine body 1 into the frustum-shaped material dispersing cylinder 31 of the material dispersing device 3. After being guided by the material guide hood 32, the coarse and fine particles are separated again by the second air supply structure 9 and the third air supply structure 10. The fine particles rise to the classification zone for secondary classification, while the coarse particles descend to the coarse powder discharge valve 6 for discharge.
[0045] To facilitate unloading, the coarse powder unloading valve 6 in this embodiment is an electric unloading valve.
[0046] The above describes a preferred embodiment of the multi-head airflow classifier of this utility model. Many other embodiments are also described but will not be elaborated upon here. In summary, compared with traditional airflow classifiers, the multi-head airflow classifier of this utility model can meet the needs of different materials and greatly improves classification accuracy, classification output, and classification efficiency.
[0047] This utility model is not limited to the specific embodiments described above. Any modifications made by those skilled in the art based on the above concept without creative effort shall fall within the protection scope of this utility model.
Claims
1. A multi-head airflow classifier, characterized in that, It includes the main body, multiple grading devices, material dispersion devices, and material buffer devices. A fine powder discharge pipe is coaxially arranged at the top of the machine body, a coarse powder discharge valve is arranged at the bottom of the machine body, and a material inlet is arranged on the side of the machine body; all the grading devices are arranged on the machine body and are arranged in a circular array around the axis of the machine body as the center, around the fine powder discharge pipe; a material dispersing device is arranged in the machine body corresponding to the material inlet, and the material dispersing device has an internal cavity that runs vertically through the machine body, and the material inlet is connected to the internal cavity of the material dispersing device; a material buffer device is arranged in the machine body and located between the grading device and the material dispersing device; a make-up air structure is also provided on the machine body.
2. The multi-head airflow classifier according to claim 1, characterized in that, The grading device includes a power unit disposed outside the machine body and a grading impeller disposed on the power unit and located inside the machine body. A fine powder feed pipe perpendicular to its axis is disposed on the side of the fine powder discharge pipe. The grading impeller corresponds to the fine powder feed pipe and the two are coaxially arranged.
3. The multi-head airflow classifier according to claim 2, characterized in that, The machine body is provided with a bearing housing, and the power unit includes a motor mounted on the machine body and a drive shaft rotatably mounted in the bearing housing. One end of the drive shaft extends into the machine body and is connected to the staged impeller, and the other end of the drive shaft extends out of the bearing housing and is connected to the motor for transmission.
4. The multi-head airflow classifier according to claim 3, characterized in that, The bearing housing is equipped with a cooling water jacket for cooling the drive shaft.
5. The multi-head airflow classifier according to claim 3, characterized in that, The grading impeller includes an upper grading disc and a lower grading disc spaced apart, a plurality of grading blades inclinedly disposed between the upper grading disc and the lower grading disc, and a bushing disposed on the upper grading disc and located between the upper grading disc and the lower grading disc. The upper grading disc, the lower grading disc, and the bushing are coaxially arranged. All the grading blades are arranged in a circular array with the axes of the upper grading disc, the lower grading disc, and the bushing as the central axis. The bushing is located inside all the grading blades and connected to the drive shaft.
6. The multi-head airflow classifier according to claim 3, characterized in that, The air supply structure includes a first air supply structure, which includes an air supply sleeve fitted outside the fine powder discharge pipe and the fine powder inlet pipe. An air supply channel is formed between the air supply sleeve and the fine powder discharge pipe and the fine powder inlet pipe. One end of the air supply sleeve extends out of the machine body, and a first air inlet communicating with the outside and the air supply channel is provided on the extended end of the air supply sleeve. The air outlet end of the air supply sleeve is fitted outside the inlet end of the fine powder inlet pipe, and a labyrinth air outlet structure is provided between the inlet end of the fine powder inlet pipe, the air outlet end of the air supply sleeve, and the classifying impeller.
7. The multi-head airflow classifier according to claim 6, characterized in that, The material dispersing device includes a frustum-shaped material dispersing cylinder and a material guide hood. The frustum-shaped material dispersing cylinder is coaxially arranged on the inner wall of the machine body, and the material guide hood is arranged below the frustum-shaped material dispersing cylinder.
8. The multi-head airflow classifier according to claim 7, characterized in that, The material guide hood includes an upper guide plate and a lower guide plate coaxially arranged with the frustum-shaped material distribution cylinder, and a plurality of guide blades inclinedly arranged between the upper guide plate and the lower guide plate. All the guide blades are arranged in a circular array with the axis of the upper guide plate and the lower guide plate as the central axis.
9. The multi-head airflow classifier according to claim 7, characterized in that, The material buffer device includes a conical buffer cylinder, which is disposed at the lower end of the fine powder discharge pipe.
10. The multi-head airflow classifier according to claim 9, characterized in that, The air supply structure further includes a second air supply structure and a third air supply structure. The second air supply structure is disposed on the machine body corresponding to the frustum-shaped material cylinder, and the third air supply structure is disposed on the machine body and located between the material inlet and the coarse powder discharge valve.