Single-head airflow classifier
By introducing a classifying impeller, material buffer, and dispersion device into the air classifier, efficient classification of high-hardness and coarse-particle materials is achieved, solving the problems of low classification accuracy and efficiency of traditional air classifiers and improving classification accuracy and output.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG JIETUM POWDER TECHNOLOGY EQUIPMENT CO LTD
- Filing Date
- 2025-03-19
- Publication Date
- 2026-04-14
AI Technical Summary
Traditional air classifiers have low classification accuracy, classification output and classification efficiency, and are particularly ineffective in classifying materials with high hardness, high specific gravity and coarseness.
The single-head airflow classifier includes a classifying impeller, a material buffer device, and a material dispersing device. It achieves multiple separations of materials through the centrifugal force of the classifying impeller and the air supply structure. Combined with the material buffer device, the flow rate is controlled to avoid material accumulation.
It improves grading accuracy and efficiency, meets the needs of different materials, and extends the service life of grading equipment.
Smart Images
Figure CN224114565U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of airflow classifier technology, specifically to a single-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 mainly consist of a motor, classifier impeller, and machine body. They have disadvantages such as low classification accuracy, low classification output and efficiency, and poor control of large particles. They are not suitable for 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 single-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 single-head airflow classifier includes a body, with a power unit and a fine powder outlet at the upper part of the body and a coarse powder outlet at the lower part. A classifying impeller, a material buffer device, and a material dispersing device are arranged sequentially from top to bottom within the body, with the classifying impeller, the material buffer device, and the material dispersing device all located between the fine powder outlet and the coarse powder outlet. The classifying impeller is mounted on the power unit, and the material buffer device and the material dispersing device are mounted on the inner wall of the body. The material buffer device and the material dispersing device each have a vertically penetrating inner cavity. A material inlet is located on the body corresponding to the position of the material dispersing device, and the material inlet communicates with the inner cavity of the material dispersing device. The body also includes a makeup air structure.
[0007] The power unit is an electric motor, and a drive shaft is rotatably mounted inside the machine body. One end of the drive shaft extends out of the machine body and is connected to the electric motor for transmission. The graded inclined impeller is mounted on the other end of the drive shaft.
[0008] The grading impeller includes an upper grading disc and a lower grading disc spaced apart, a plurality of grading blades inclined between the upper and lower grading discs, and a bushing disposed on the lower 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.
[0009] The air supply structure includes a first air supply structure, which includes an airflow cavity disposed in the body, a first air supply port disposed on the body and connected to the airflow cavity, and an annular air inlet groove disposed on the body and connected to the airflow cavity. An annular boss is coaxially disposed on the upper classifier plate, and the annular boss is rotatably disposed in the annular air inlet groove.
[0010] The material dispersing device includes a frustum-shaped material dispersing cylinder and a material guide shroud disposed below the frustum-shaped material dispersing cylinder, wherein the frustum-shaped material dispersing cylinder is disposed on the inner wall of the machine body.
[0011] The material guide hood includes an upper guide plate and a lower guide plate arranged coaxially, and a plurality of guide blades inclined 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.
[0012] The material buffer device includes a frustum-shaped buffer cylinder and multiple support rods arranged in a circular array around the frustum-shaped buffer cylinder. The support rods are connected to the inner wall of the machine body, and a buffer diversion channel is formed between two adjacent support rods and the inner cavity of the frustum-shaped buffer cylinder.
[0013] The air supply structure further includes a second air supply structure, which is disposed on the machine body corresponding to the material dispersion device. The second air supply structure includes a plurality of second air supply ports arranged in a circular array on the machine body, and an adjusting damper disposed at the second air supply port.
[0014] The air supply structure further includes a third air supply structure disposed on the machine body 1. The third air supply structure is located between the material inlet and the coarse powder outlet and is arranged close to the coarse powder outlet.
[0015] The coarse powder outlet is equipped with an electric unloading valve.
[0016] By adopting the above technical solution, the beneficial effects of this utility model are:
[0017] The single-head airflow classifier provided by this utility model uses a classifying inclined impeller and incorporates a material dispersion device and a material buffer device within the machine body. When the 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. After passing through the material buffer device, it reaches the classification zone. Under the strong centrifugal force generated by the high-speed rotating classifying inclined impeller, the coarse and fine particles of the material are separated. Fine particles that meet the particle size requirements are discharged from the fine powder outlet through the gaps in the classifying inclined impeller. 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 stage. The material is discharged at the outlet. 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 outlet. 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 classifying impeller and the machine body, thus extending their service life. The design of the classifying impeller allows the material to collide with the blades multiple times, preventing material accumulation in localized areas and further improving classification accuracy and efficiency. In summary, compared with traditional air classifiers, this novel single-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 single-head airflow classifier of this utility model;
[0019] Figure 2 yes Figure 1 Schematic diagram of the structure of a mid-stage inclined 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 in the middle;
[0024] In the diagram: 1. Machine body; 11. Machine head; 110. Fine powder outlet; 111. Annular air inlet groove; 112. Air inlet hole; 12. Upper cylinder; 120. Feed pipe; 13. Lower cylinder; 131. Support leg; 14. Motor base; 2. Power unit; 21. Drive shaft; 3. Grading impeller; 31. Upper grading disc; 310. Annular boss; 32. Lower grading disc; 33. Grading blade; 34. Bushing; 4. Material buffer device; 41. Frustum-shaped buffer cylinder; 42. Support rod; 5. Material dispersion device; 51. Frustum-shaped material dispersing cylinder; 52. Material guide hood; 521. Upper guide plate; 522. Lower guide plate; 523. Guide blade; 6. First air supply structure; 61. Airflow chamber; 62. First air supply port; 7. Second air supply structure; 8. Third air supply structure; 9. Electric unloading valve. 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 single-head airflow classifier, including a body 1. A power unit 2 and a fine powder outlet 110 are located at the upper part of the body 1, and a coarse powder outlet is located at the lower part of the body 1. Inside the body 1, from top to bottom, a classifying inclined impeller 3, a material buffer device 4, and a material dispersing device 5 are arranged sequentially, with the classifying inclined impeller 3, the material buffer device 4, and the material dispersing device 5 all located between the fine powder outlet 110 and the coarse powder outlet. The classifying inclined impeller 3 is mounted on the power unit 2, and the material buffer device 4 and the material dispersing device 5 are mounted on the inner wall of the body 1. The material buffer device 4 and the material dispersing device 5 each have a vertically penetrating inner cavity. A material inlet is located on the body 1 at the position corresponding to the material dispersing device 5, and the material inlet communicates with the inner cavity of the material dispersing device 5. The body 1 also has a makeup air structure.
[0027] In this embodiment, the single-head airflow classifier uses a classifying inclined impeller 3, and also has a material dispersion device 5 and a material buffer device 4 installed inside the machine body 1. When the material enters the material dispersion device 5 through the material inlet, it is impacted and diffused upon hitting the inner wall of the material dispersion device 5. Under the suction force of the induced draft fan, the material moves at high speed with the rising airflow, passes through the material buffer device 4, and reaches the classification zone. Under the strong centrifugal force generated by the high-speed rotating classifying inclined impeller 3, the coarse and fine particles of the material are separated. Fine particles that meet the particle size requirements are discharged from the fine powder outlet 110 through the gap of the classifying inclined impeller 3. 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 5. The material dispersion device 5 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... The material is discharged at the coarse powder outlet. During the entire material classification process, the material dispersion device 5 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 outlet due to gravity accumulation. This improves 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 wear on the classification impeller 3 and the machine body 1, thereby extending the service life of the classification impeller 3 and the machine body 1. The setting of the classification impeller 3 allows the material to collide with the blades of the classification impeller 3 multiple times, avoiding the accumulation of material in local areas, thereby improving classification accuracy and efficiency.
[0028] In this embodiment, the machine body 1 includes a head 11, an upper cylinder 12, and a lower cylinder 13 connected sequentially from top to bottom via flanges. A fine powder outlet 110 is located on the side wall of the head 11, and a material inlet is located on the side wall of the upper cylinder 12. To facilitate feeding, a feed pipe 120 is provided at the material inlet in this embodiment. The coarse powder outlet is located at the lower end of the lower cylinder 13. 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 impose any limitations on this.
[0029] Since the motor has strong overload capacity and good starting and speed regulation performance, the power device 2 in this embodiment is preferably a motor. A transmission shaft 21 is rotatably arranged inside the machine body 1. One end of the transmission shaft 21 extends out of the machine body 1 and is connected to the motor for transmission. The graded inclined impeller 3 is arranged on the other end of the transmission shaft 21.
[0030] Specifically, a motor base 14 is provided on the top of the machine head 11, and the motor is mounted on the motor base 14; the transmission shaft 21 is rotatably mounted inside the machine head 11 through a bearing (this is the existing structure and will not be described in detail here), and one end of the transmission shaft 21 extends into the motor base 14 and is connected to the motor through a coupling, while the other end of the transmission shaft 21 extends out of the machine head 11 and is connected to the classifying inclined impeller 3.
[0031] The grading impeller 3 in this embodiment includes an upper grading disk 31 and a lower grading disk 32 spaced apart, a plurality of grading blades 33 inclinedly arranged between the upper grading disk 31 and the lower grading disk 32, and a bushing 34 arranged on the lower grading disk 32 and located between the upper grading disk 31 and the lower grading disk 32. The upper grading disk 31, the lower grading disk 32 and the bushing 34 are coaxially arranged. All the grading blades 33 are arranged in a circular array with the axis of the upper grading disk 31, the lower grading disk 32 and the bushing 34 as the central axis. The bushing 34 is located inside the grading blades 33 and connected to the drive shaft 21.
[0032] In this embodiment, the tilt angle α of the grading blade 33 is 25°. In practical applications, the tilt angle α of the grading blade 33 can be set according to the particle size requirements of the material. This embodiment does not impose any restrictions on this.
[0033] The air supply structure in this embodiment includes a first air supply structure 6, which includes an airflow cavity 61 disposed within the machine body 1, a first air supply port 62 disposed on the machine body 1 and connected to the airflow cavity 61, and an annular air inlet groove 111 disposed on the machine body 1 and connected to the airflow cavity 61. An annular boss 310 is coaxially disposed on the upper grading disc 31, and the annular boss 310 is rotatably disposed within the annular air inlet groove 111. By setting the first air supply structure 6, the airflow balance within the machine body 1 is ensured, resulting in more stable particle size classification of the material.
[0034] Specifically, a conical baffle is provided inside the head unit 11. The conical baffle, together with the flange and side wall of the head unit 11, forms an airflow cavity 61. The first air supply port 62 is located on the side wall of the head unit 11, and an annular air inlet groove 111 is located on the flange of the head unit 11. An air inlet hole 112 is provided on the flange of the head unit 11 at a position corresponding to the annular air inlet groove 111, connecting the annular air inlet groove 111 and the airflow cavity 61.
[0035] The material dispersing device 5 in this embodiment includes a frustum-shaped material dispersing cylinder 51 and a material guide hood 52 disposed below the frustum-shaped material dispersing cylinder 51. The frustum-shaped material dispersing cylinder 51 is disposed on the inner wall of the machine body 1.
[0036] Specifically, the upper cylinder 12 is cylindrical, and the frustum-shaped material cylinder 51 is disposed inside the upper cylinder 12, with the larger end of the frustum-shaped material cylinder 51 at the top and the smaller end at the bottom, and the material guide hood 52 is disposed on the smaller end of the frustum-shaped material cylinder 51.
[0037] In this embodiment, the material guide hood 52 includes an upper guide plate 521 and a lower guide plate 522 arranged coaxially, and a plurality of guide blades 523 inclinedly arranged between the upper guide plate 521 and the lower guide plate 522. All guide blades 523 are arranged in a circular array with the axis of the upper guide plate 521 and the lower guide plate 522 as the central axis. The upper guide plate 521 is fixedly arranged on the small end of the frustum-shaped material dispensing cylinder 51.
[0038] In this embodiment, the tilt angle b of the guide vane 523 is 48°. In practical applications, the tilt angle b of the guide vane 523 can be set according to the particle size requirements of the material. This embodiment does not impose any restrictions on this.
[0039] The material buffer device 4 in this embodiment includes a frustum-shaped buffer cylinder 41 and multiple support rods 42 arranged in a circular array around the frustum-shaped buffer cylinder 41. The support rods 42 are connected to the inner wall of the machine body 1, and a buffer diversion channel is formed between two adjacent support rods 42 and the inner cavity of the frustum-shaped buffer cylinder 41.
[0040] Specifically, the support rod 42 is set on the inner wall of the upper cylinder 12, with the large end of the frustum-shaped buffer cylinder 41 at the top and the small end of the frustum-shaped buffer cylinder 41 at the bottom.
[0041] The air supply structure in this embodiment also includes a second air supply structure 7, which is mounted on the machine body 1 corresponding to the material dispersion device 5. The second air supply structure 7 includes multiple second air supply ports arranged in a circular array on the machine body 1, and regulating dampers located at the second air supply ports. The air supply structure also includes a third air supply structure 8, which is located between the material inlet and the coarse powder outlet and is arranged close to the coarse powder outlet. Both the second air supply structure 7 and the third air supply structure 8 in this embodiment are existing technologies, and their function is to increase the air intake, so as to separate coarse and fine particles again, thereby improving the classification accuracy and classification efficiency. Their structures will not be described in detail here.
[0042] In this embodiment, the lower cylinder 13 includes a cylindrical section and a conical section connected together. The upper end of the cylindrical section is connected to the upper cylinder 12 through a flange, and the lower end of the cylindrical section is provided with a support leg 131. The lower port of the conical section is the coarse powder outlet, and the third air supply structure 8 is provided on the conical section.
[0043] During 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 51 of the material dispersing device 5. After being guided by the material guide hood 52, the coarse and fine particles are separated again by the second air supply structure 7 and the third air supply structure 8. The fine particles rise to the grading zone for secondary grading, while the coarse particles descend to the coarse powder outlet for discharge.
[0044] To facilitate unloading, an electric unloading valve 9 is installed at the coarse powder outlet in this embodiment.
[0045] The above describes a preferred embodiment of the single-head airflow classifier of this utility model in detail. Many other embodiments are also described but will not be elaborated upon here. In summary, compared with traditional airflow classifiers, the single-head airflow classifier provided by this utility model can meet the needs of different materials and greatly improves classification accuracy, classification output, and classification efficiency.
[0046] 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 single-head airflow classifier, comprising a body, characterized in that, The upper part of the machine body is provided with a power unit and a fine powder outlet, and the lower part of the machine body is provided with a coarse powder outlet. From top to bottom, a classifying inclined impeller, a material buffer device, and a material dispersing device are arranged sequentially inside the machine body, with the classifying inclined impeller, the material buffer device, and the material dispersing device all located between the fine powder outlet and the coarse powder outlet. The classifying inclined impeller is mounted on the power unit, and the material buffer device and the material dispersing device are mounted on the inner wall of the machine body. The material buffer device and the material dispersing device each have a vertically penetrating inner cavity. A material inlet is provided on the machine body corresponding to the position of the material dispersing device, and the material inlet communicates with the inner cavity of the material dispersing device. The machine body also has a makeup air structure. The material dispersing device includes a frustum-shaped material dispersing cylinder and a material guide shroud disposed below the frustum-shaped material dispersing cylinder, wherein the frustum-shaped material dispersing cylinder is disposed on the inner wall of the machine body; The material guide hood includes an upper guide plate and a lower guide plate arranged coaxially, and a plurality of guide blades inclined 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.
2. The single-head airflow classifier according to claim 1, characterized in that, The power unit is an electric motor, and a drive shaft is rotatably mounted inside the machine body. One end of the drive shaft extends out of the machine body and is connected to the electric motor for transmission. The graded inclined impeller is mounted on the other end of the drive shaft.
3. The single-head airflow classifier according to claim 2, characterized in that, The grading impeller includes an upper grading disc and a lower grading disc spaced apart, a plurality of grading blades inclined between the upper grading disc and the lower grading disc, and a bushing disposed on the lower 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.
4. The single-head airflow classifier according to claim 3, characterized in that, The air supply structure includes a first air supply structure, which includes an airflow cavity disposed in the body, a first air supply port disposed on the body and connected to the airflow cavity, and an annular air inlet groove disposed on the body and connected to the airflow cavity. An annular boss is coaxially disposed on the upper classifier plate, and the annular boss is rotatably disposed in the annular air inlet groove.
5. The single-head airflow classifier according to claim 1, characterized in that, The material buffer device includes a frustum-shaped buffer cylinder and multiple support rods arranged in a circular array around the frustum-shaped buffer cylinder. The support rods are connected to the inner wall of the machine body, and a buffer diversion channel is formed between two adjacent support rods and the inner cavity of the frustum-shaped buffer cylinder.
6. The single-head airflow classifier according to claim 5, characterized in that, The air supply structure also includes a second air supply structure, which is disposed on the machine body corresponding to the material dispersion device. The second air supply structure includes a plurality of second air supply ports arranged in a circular array on the machine body, and an adjusting damper disposed at the second air supply port.
7. The single-head airflow classifier according to claim 6, characterized in that, The air supply structure also includes a third air supply structure disposed on the machine body. The third air supply structure is located between the material inlet and the coarse powder outlet and is arranged close to the coarse powder outlet.
8. The single-head airflow classifier according to claim 1, characterized in that, The coarse powder outlet is equipped with an electric unloading valve.