A special classifier for carbon powder
By designing a 'separation zone' and limiting columns in the toner classifier in conjunction with a vibrating separation disc, the problem of low classification efficiency was solved, and efficient separation of toner particles of different qualities was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HANDAN AOFENG OFFICE EQUIP CO LTD
- Filing Date
- 2025-03-19
- Publication Date
- 2026-06-23
AI Technical Summary
The low classification efficiency of existing toner classifiers is mainly due to the centrifugal effect of the rotating disc causing disordered material movement. Larger materials cover smaller materials, forming a barrier and resulting in low classification efficiency.
A toner-specific classifier was designed. Multiple sets of partitions are set on the distribution plate to form a 'distribution zone'. The distribution plate vibrates up and down by the cooperation of the limiting column and the bottom plate. Combined with the flow limiting plate and the intercepting bar, the movement of materials is controlled to separate materials of different mass sizes.
It significantly improves grading efficiency, ensures rapid separation of materials with smaller mass, avoids clogging, and enhances the practicality and grading effect of the device.
Smart Images
Figure CN119909928B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of grading machine technology, specifically to a toner-specific grading machine. Background Technology
[0002] Toner is a common consumable in laser printers and copiers, used to create text and images. Toner is generally prepared mechanically, using mechanical crushing to break down large blocks of resin and pigment into a fine particle mixture. This mixture is then melted at high temperature to form a homogeneous melt. After cooling and solidifying into blocks or strips, it is further crushed into powder. The final step is to use a specialized classifier to sort the powder according to particle size. Currently, a cyclone vortex classifier is mainly used to classify toner particles, as follows: The material enters the classifier from the top and is evenly dispersed outwards by the centrifugal force of the rotating disc. Then, a cyclone air inlet is installed at the bottom of the device, allowing airflow to enter tangentially inside the device, generating a spiraling upward airflow. The current technology for classifying small particles relies on the centrifugal force of a rotating disc to throw the material around the inner wall of the classifier. The negative pressure generated by the upward spiral airflow causes lighter materials to move upwards, while heavier materials move downwards under gravity. However, due to the large distance between the outer side of the rotating disc and the inner wall of the classifier, and the fact that the upward spiral negative pressure airflow is close to the inner wall, smaller materials mixed with heavier materials tend to drift with the flow. Furthermore, the disordered movement of materials on the rotating disc can cause heavier materials to cover lighter materials, creating a barrier between these materials and the upward spiral negative pressure airflow as they fall, resulting in low classification efficiency. Therefore, this problem urgently needs to be addressed. Summary of the Invention
[0003] This invention proposes a toner-specific classifier, which solves the problem of low classification efficiency in related technologies.
[0004] The technical solution of the present invention is as follows: A toner-specific classifier includes a classifying cylinder. An exhaust port and an air inlet are sequentially installed from top to bottom on the outer surface of the classifying cylinder, tangent to the outer surface of the cylinder. A fan is installed on the front of the air inlet. A support cylinder is fixedly installed on the top of the classifying cylinder. A feed inlet is installed on the side of the support cylinder. A motor is installed on the top of the support cylinder. Multiple sets of support columns are fixedly connected to the middle of the inner wall of the classifying cylinder. A base plate is fixedly installed at one end of each support column. An adapter groove is opened on the top of the base plate. A distribution plate is arranged above the base plate. A limiting post is fixedly connected to the bottom of the distribution plate. The limiting post is adapted to engage in the adapter groove. A connecting cylinder is fixedly installed on the top of the distribution plate. The output shaft of the motor extends downward into the connecting cylinder and is connected to the connecting cylinder in a transmission manner. A spring is elastically connected between the output shaft of the motor and the inner wall of the connecting cylinder. Multiple sets of partitions are equidistantly installed on the top circumference of the distribution plate. A top ring is fixedly connected to the top of each partition. Each set of partitions consists of two partitions, which are distributed parallel to each other. Rotating shafts two and one are rotatably installed between the two partitions along the radial line of the distribution plate. A flow limiting plate is movably sleeved on the outer surface of rotating shaft two, and a support plate is movably sleeved on the outer surface of rotating shaft one. Multiple sets of limiting plates are fixedly installed on the outer edge of the top of the distribution plate, and a discharge port is opened. A support plate is fixedly connected between each set of partitions, and a vertical plate is fixedly connected to the top of the support plate.
[0005] Preferably, there are four adapter slots and four limiting posts, all of which are equidistantly distributed around the circumference. The limiting posts have a semi-circular cross-sectional shape, and a gap is left between the bottom of the distribution plate and the top of the base plate.
[0006] Preferably, the bottom of the outer surface of the motor output shaft is provided with a spline, which is slidably engaged with the inner wall of the connecting cylinder, so that the connecting cylinder and the dispensing disc can move up and down simultaneously as the motor rotates.
[0007] Preferably, a fixing ring is fixedly installed on the top of the inner wall of the grading cylinder, located below the exhaust port. The axial cross-section of the fixing ring is "L" shaped, and the exhaust port and the air inlet are perpendicular to each other.
[0008] Preferably, a limiting cylinder is fixedly installed on the top of the top ring, and the bottom of the support cylinder is located inside the limiting cylinder.
[0009] Preferably, each set of partitions forms a "material distribution area" between the material distribution plate and the top ring, and multiple sets of intercepting strips are fixedly installed at equal intervals at the bottom of the "material distribution area".
[0010] Preferably, the first rotating shaft is rotatably mounted at the vertical midpoint of the partition surface, and when multiple sets of the first rotating shafts rotate to the horizontal position, there is a gap between them.
[0011] Preferably, the intercepting strip has a semi-circular cross-sectional shape and is made of rubber blocks.
[0012] Preferably, the maximum rotation angle of the flow limiting plate is 60°, and when the flow limiting plate rotates to a position of 90° toward the support plate, the bottom of the flow limiting plate is at the same height as the pivot.
[0013] Preferably, the vertical plates are arranged in two groups and are symmetrically distributed on the top of the support plate.
[0014] The working principle and beneficial effects of this invention are as follows:
[0015] 1. This device has been redesigned to allow materials to be directly stratified before leaving the distribution plate, greatly improving the device's grading efficiency. The main improvements and optimizations to the upper surface of the distribution plate include the addition of multiple sets of partitions. Each set of partitions is parallel to the others and forms a "distribution zone" with the distribution plate and top ring. When materials enter the distribution plate along the support cylinder, they are evenly distributed into the "distribution zone" under centrifugal force. At this point, intercepting bars slow down the material's movement speed, while the smaller materials, which experience less resistance, move faster. Simultaneously, limiting posts installed at the bottom of the distribution plate, combined with the matching groove at the top of the base plate, cause the distribution plate to vibrate vertically during rotation, causing the materials in the "distribution zone" to be vibrated and thrown up. This allows the smaller materials to gradually move to the upper layer. The materials moving to the upper layer can then move horizontally to the outside of the distribution plate via the support plates and vertical plates, while the larger materials flow vertically downwards through the discharge port, increasing the gap between the two streams and allowing the smaller materials to separate quickly. This achieves the function of improving the device's grading efficiency.
[0016] 2. The function of the "material distribution zone" in this device is to separate two streams of materials with different masses in conjunction with the up-and-down vibration of the material distribution plate. By opening a discharge port at the top of the material distribution plate and installing a limiting plate near the discharge port, the larger mass material that has been separated to the lower layer by the up-and-down vibration can be directly discharged vertically along the discharge port under the interception of the limiting plate. The material passing through the limiting plate is mainly the larger mass part, mixed with a small amount of smaller mass material. By setting support plates and vertical plates in the opening of the "material distribution zone", the material passage area is reduced, and the negative pressure pushes the material outward, so that the material does not become blocked in the "material distribution zone".
[0017] 3. The second rotating shaft of this device is made of cast iron and its maximum outward turning angle is 60° relative to the vertical line. This is to limit the passage area of the material entering the "distribution zone" and prevent the height of the material in the "distribution zone" from exceeding that of the first rotating shaft and the support plate when rotated to a horizontal state. This device controls the amount of material entering the "distribution zone" by setting a flow-limiting plate and its rotation angle design. At the same time, the material entering the "distribution zone" pushes and supports the support plate, keeping the support plate in a horizontal state. This design provides support space for small-mass materials moving to the upper layer, preventing smaller materials from mixing with larger materials again, and effectively improving the practicality of the device. Attached Figure Description
[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;
[0020] Figure 2 This is a front sectional view of the overall structure of the present invention;
[0021] Figure 3 For the present invention Figure 2 Enlarged schematic diagram of the structure at point A;
[0022] Figure 4 For the present invention Figure 2 Enlarged schematic diagram of the structure at point B;
[0023] Figure 5 This is a partial sectional view of the overall structure of the present invention from the side.
[0024] Figure 6 For the present invention Figure 5 Enlarged schematic diagram of the structure at point C;
[0025] Figure 7 This is a schematic diagram of the internal structure of the "material distribution area" of the present invention;
[0026] Figure 8 This is a schematic diagram showing the separation of a partial structure of the present invention;
[0027] Figure 9 This is a schematic diagram of the separation of the "material distribution area" in this invention.
[0028] In the diagram: 1. Grading cylinder; 2. Air inlet; 3. Fan; 4. Exhaust outlet; 5. Support cylinder; 6. Motor; 61. Spline; 7. Feed inlet; 8. Support column; 9. Base plate; 10. Adaptor groove; 11. Limiting post; 12. Distributor plate; 13. Discharge port; 14. Limiting plate; 15. Top ring; 16. Limiting cylinder; 17. Connecting cylinder; 18. Spring; 19. Intercepting bar; 20. Partition plate; 21. Support plate; 22. Vertical plate; 23. Rotating shaft one; 24. Support plate; 25. Rotating shaft two; 26. Flow limiting plate; 27. Fixing ring. Detailed Implementation
[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.
[0030] like Figures 1 to 9 As shown, this embodiment of the invention provides a toner-specific classifier, including a classifier cylinder 1. An exhaust port 4 and an air inlet 2 are sequentially installed from top to bottom on the outer surface of the classifier cylinder 1, tangent to the outer surface. A fan 3 is installed on the front of the air inlet 2. A support cylinder 5 is fixedly installed on the top of the classifier cylinder 1, and a feed inlet 7 is installed on the side of the support cylinder 5. A motor 6 is installed on the top of the support cylinder 5. Multiple sets of support columns 8 are fixedly connected to the middle of the inner wall of the classifier cylinder 1. A base plate 9 is fixedly installed at one end of each support column 8. An adapter groove 10 is opened on the top of the base plate 9. A distribution plate 12 is arranged above the base plate 9. A limiting post 11 is fixedly connected to the bottom of the distribution plate 12, and the limiting post 11 is adapted to engage in the adapter groove 10. A connecting cylinder 17 is fixedly installed on the top of the distribution plate 12. The output axis of the motor 6 is... The motor 6 extends into the connecting cylinder 17 and is connected to the connecting cylinder 17 in a transmission manner. The output shaft of the motor 6 is elastically connected to the inner wall of the connecting cylinder 17 by a spring 18. Multiple sets of partitions 20 are installed equidistantly on the top circumference of the distribution plate 12. The top of the partition 20 is fixedly connected to the top ring 15. There are two partitions 20 in each set, and they are distributed parallel to each other. Rotating shaft 25 and rotating shaft 23 are installed between the two partitions 20 in sequence along the radial line of the distribution plate 12. The outer surface of rotating shaft 25 is movably sleeved with a flow limiting plate 26. The outer surface of rotating shaft 23 is movably sleeved with a support plate 24. Multiple sets of limiting plates 14 are fixedly installed on the outer edge of the top of the distribution plate 12, and a discharge port 13 is opened. Each set of partitions 20 is fixedly connected to a support plate 21. The top of the support plate 21 is fixedly connected to a vertical plate 22.
[0031] This device has been redesigned to allow materials to be directly stratified before leaving the distribution plate 12, greatly improving the grading efficiency. The main improvements and optimizations to the upper surface of the distribution plate 12 include the addition of multiple sets of baffles 20. Each set of baffles 20 is parallel to the others and forms a "distribution zone" with the distribution plate 12 and the top ring 15. When materials enter the distribution plate 12 along the support cylinder 5, they are evenly distributed into the "distribution zone" under centrifugal force. At this point, the intercepting bars 19 intercept the materials, slowing their movement speed. Furthermore, the smaller mass of the material experiences less resistance, thus accelerating the flow of materials with smaller mass. The material movement speed is controlled by the limiting post 11 installed at the bottom of the distribution plate 12, which, together with the adapter groove 10 opened at the top of the base plate 9, enables the distribution plate 12 to vibrate up and down when rotating. This vibrates and flies the material in the "distribution area", allowing the smaller material to gradually move to the upper layer. The material that moves to the upper layer can be moved horizontally to the outside of the distribution plate 12 through the support plate 21 and the vertical plate 22, while the larger material is directly vertically downward through the discharge port 13, increasing the gap between the two materials and enabling the smaller material to be separated quickly. This achieves the function of improving the classification efficiency of the device.
[0032] There are four adapter slots 10 and four limiting posts 11, which are distributed equidistantly in a circle. The cross-sectional shape of the limiting post 11 is semi-circular, and there is a gap between the bottom of the material distribution plate 12 and the top of the base plate 9.
[0033] The limiting post 11 is fitted into the fitting groove 10, and the base plate 9 is fixed. When the distributing plate 12 drives the limiting post 11 to rotate, the limiting post 11 will inevitably disengage from the interior of the fitting groove 10. Under the limiting action of the upper surface of the base plate 9, it will drive the distributing plate 12 and the connecting cylinder 17 to move upward as a whole, thereby compressing the spring 18. When the limiting post 11 moves to the position that coincides with the next set of fitting grooves 10, the connecting cylinder 17, the distributing plate 12, and the limiting post 11 will inevitably move downward under the clamping force of their own weight and the elastic force of the spring 18, thereby realizing the up and down vibration function of the distributing plate 12, providing the material in the "distribution area" with a vibration and flying function, and effectively realizing the material classification function.
[0034] The bottom of the outer surface of the output shaft of the motor 6 is provided with a spline 61, which is slidably engaged with the inner wall of the connecting cylinder 17, so that the connecting cylinder 17 and the distributing plate 12 can move up and down simultaneously as the motor 6 rotates.
[0035] The function of spline 61 is not only to enable motor 6 to drive connecting cylinder 17 and distributing plate 12 to rotate, but also to enable connecting cylinder 17 to move relative to the surface of motor 6 when distributing plate 12 moves up and down under the action of limiting post 11 and adapter groove 10, without jamming.
[0036] Among them, a fixing ring 27 located below the exhaust port 4 is fixedly installed on the top of the inner wall of the grading cylinder 1. The axial cross-section of the fixing ring 27 is "L" shaped, and the exhaust port 4 and the air inlet 2 are perpendicular to each other.
[0037] like Figure 2 As shown, the fixed ring 27, together with the fan 3, forms a spiral upward negative pressure airflow that carries away materials with smaller mass.
[0038] Among them, the top ring 15 is fixedly installed with a limiting cylinder 16, and the bottom of the support cylinder 5 is located inside the limiting cylinder 16;
[0039] The top ring 15 is connected to the limiting cylinder 16 to limit the material falling from the support cylinder 5, so that it can completely enter the "distribution area" on the upper surface of the distribution plate 12. The top ring 15 forms a centrifugal discharge channel between itself, the partition plate 20 and the distribution plate 12.
[0040] Each set of partitions 20 forms a "material distribution area" with the material distribution plate 12 and the top ring 15. Multiple sets of intercepting strips 19 are fixedly installed at equal intervals at the bottom of the "material distribution area".
[0041] The function of the "material distribution zone" is to divert two streams of materials with different masses in conjunction with the up-and-down vibration of the material distribution plate 12. By opening a discharge port 13 at the top of the material distribution plate 12 and installing a limiting plate 14 near the discharge port 13, the larger mass material that has been divided to the lower layer by the up-and-down vibration can be directly discharged vertically along the discharge port 13 under the interception of the limiting plate 14. The material passing through the limiting plate 14 is mainly the larger mass part, mixed with a small amount of smaller mass material. By setting the support plate 21 and the vertical plate 22 at the opening of the "material distribution zone", the material passage area is reduced, and the negative pressure pushes the material outward, so that the material does not become blocked in the "material distribution zone".
[0042] Among them, the rotating shaft 23 is rotatably installed at the vertical midpoint of the surface of the partition plate 20, and the multiple sets of rotating shafts 23 leave gaps between each other when they rotate to the horizontal position;
[0043] The rotating shaft 23 is located at the vertical midpoint of the partition 20. Under the pushing and centrifugal force of the material, it automatically rotates to a horizontal position. The horizontally placed rotating shaft 23 can provide a platform for smaller materials that move to the upper layer.
[0044] The interceptor strip 19 has a semi-circular cross-sectional shape and is made of rubber blocks.
[0045] Interception bar 19 is used to intercept materials located at the bottom layer, slow down the movement speed of materials under centrifugal force, and provide time conditions for material distribution in the "distribution zone" of the device.
[0046] The maximum rotation angle of the flow limiting plate 26 is 60°. When the flow limiting plate 26 rotates to a position of 90° toward the support plate 24, the bottom of the flow limiting plate 26 is at the same height as the rotating shaft 23.
[0047] The second rotating shaft 25 is made of cast iron and is designed with a maximum outward turning angle of 60° relative to the vertical line. This is to limit the passage area of the material entering the "distribution zone" and prevent the height of the material in the "distribution zone" from exceeding that of the first rotating shaft 23 and the support plate 24 when rotated to a horizontal state. This device controls the amount of material entering the "distribution zone" by setting a flow-limiting plate 26 and controlling its rotation angle. At the same time, the material entering the "distribution zone" pushes and supports the support plate 24, keeping the support plate 24 in a horizontal state. This design provides support space for small-mass materials moving to the upper layer, preventing smaller materials from mixing with larger materials again, and effectively improving the practicality of the device.
[0048] Among them, the vertical plates 22 are set in two groups and are symmetrically distributed on the top of the support plate 21;
[0049] Support plate 21 and vertical plate 22 are discharge channels for materials with small mass, and their relatively narrow passage space allows the materials to be discharged efficiently.
[0050] Working principle:
[0051] First, start the blower 3 and blow positive pressure air into the inner cavity of the classifier cylinder 1 through the air inlet 2 along the tangent of the surface of the classifier cylinder 1. The airflow spirals upward along the inner wall area of the classifier cylinder 1 and is discharged through the exhaust port 4, generating an upward negative pressure in the inner wall area of the classifier cylinder 1. The material is poured into the inside of the support cylinder 5 through the feed inlet 7. At the same time, start the motor 6 to drive the connecting cylinder 17 and the distribution plate 12 to rotate.
[0052] Then, the material enters the upper surface area of the distribution plate 12 along the gap between the support cylinder 5 and the connecting cylinder 17. Under the centrifugal force generated by the rotation of the distribution plate 12, the material moves along the radial line of the distribution plate 12 towards the side away from the axis of the distribution plate 12 and enters the "distribution area". At the same time, the distribution plate 12 drives the limiting post 11 to rotate. Since the limiting post 11 is stuck in the adapter groove 10, when the limiting post 11 is driven to rotate by the distribution plate 12 and leaves the interior of the adapter groove 10, at this time, since the base plate 9 is fixed, the distribution plate 12 and the limiting post 11 are pushed upward by the upper surface of the base plate 9. At this time, the distribution plate 12 drives the connecting cylinder 17 to move upward relative to the motor 6 and compress the spring 18. When the distribution plate 12 rotates 90°, the limiting post 11 is driven to re-enter the adapter groove 10, so that the distribution plate 12 can achieve four up and down vibrations per revolution.
[0053] Then, the up-and-down vibration of the distribution plate 12 pulls the material in the "distribution zone" upward and disperses it. In the "distribution zone," the rotating shaft 25 and the support plate 24 are driven by the centrifugal force generated by the rotation of the distribution plate 12, and begin to rotate and turn a certain angle toward the limiting plate 14. At the same time, when the material passes through the rotating shaft 25, it will push the rotating shaft 25 to continue to rotate upward. After the rotating shaft 25 has rotated 60°, the distance between its bottom and the top of the distribution plate 12 remains constant, limiting the area through which the material passes, so that the material entering the "distribution zone" will not be too high. At the rotating shaft 23, the support plate 24 rotates to a horizontal state towards the side of the limiting plate 14 under the push of the material. At this time, the material that has been vibrating and tumbling up and down, the part with smaller mass begins to move to the upper surface of the support plate 24 and gradually forms an upper and lower layer with the material with larger mass. The material with smaller mass begins to pass through the support plate 24 and move to the support plate 21. Driven by the spiral upward negative pressure airflow in the inner cavity of the grading cylinder 1, it is discharged along the exhaust port 4, while the material with larger mass located on the lower side moves vertically downward along the discharge port 13 and is discharged.
[0054] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A toner-specific classifier, comprising a classifier cylinder (1), wherein an exhaust port (4) and an air inlet (2) are sequentially installed from top to bottom on the outer surface of the classifier cylinder (1) and are tangent to the outer surface of the classifier cylinder (1), a fan (3) is installed on the front of the air inlet (2), a support cylinder (5) is fixedly installed on the top of the classifier cylinder (1), a feed inlet (7) is installed on the side of the support cylinder (5), and a motor (6) is installed on the top of the support cylinder (5), characterized in that, Multiple sets of support columns (8) are fixedly connected to the middle of the inner wall of the grading cylinder (1). A base plate (9) is fixedly installed at one end of each support column (8). An adapter groove (10) is opened on the top of the base plate (9). A distribution plate (12) is provided above the base plate (9). A limiting post (11) is fixedly connected to the bottom of the distribution plate (12). The limiting post (11) is adapted to fit into the adapter groove (10). A connecting cylinder (17) is fixedly installed on the top of the distribution plate (12). The motor (6) The output shaft of the motor (6) extends downward into the connecting cylinder (17) and is connected to the connecting cylinder (17) in a transmission manner. A spring (18) is elastically connected between the output shaft of the motor (6) and the inner wall of the connecting cylinder (17). Multiple sets of partitions (20) are installed equidistantly on the top circumference of the distribution plate (12). The top of the partition (20) is fixedly connected to a top ring (15). Each set of partitions (20) consists of two partitions, which are distributed in parallel to each other. The two partitions (20) are separated by a diameter along the distribution plate (12). The line is sequentially mounted with rotating shaft two (25) and rotating shaft one (23). The outer surface of rotating shaft two (25) is movably fitted with a flow limiting plate (26), and the outer surface of rotating shaft one (23) is movably fitted with a support plate (24). The outer edge of the top of the material distribution plate (12) is fixedly installed with multiple sets of limiting plates (14) and has a discharge port (13). Each set of partitions (20) is fixedly connected with a support plate (21). The top of the support plate (21) is fixedly connected with a vertical plate (22). The rotating shaft one (23) Rotate the vertical midpoint of the partition plate (20) surface. When the multiple sets of support plates (24) rotate to the horizontal position, there is a gap between them. The maximum rotation angle of the flow limiting plate (26) is 60°. When the flow limiting plate (26) rotates to the position of 60° towards the support plate (24), the bottom of the flow limiting plate (26) is at the same height as the first rotating shaft (23). The material moving to the upper layer can be moved horizontally to the outside of the distribution plate (12) through the support plate (21) and the vertical plate (22).
2. The toner-specific classifier according to claim 1, characterized in that, The number of the adapter groove (10) and the limiting post (11) are four, and they are all distributed equidistantly in a circle. The cross-sectional shape of the limiting post (11) is semi-circular. There is a gap between the bottom of the material distribution plate (12) and the top of the base plate (9).
3. A toner-specific classifier according to claim 2, characterized in that, The bottom of the outer surface of the output shaft of the motor (6) is provided with a spline (61), which is slidably engaged with the inner wall of the connecting cylinder (17), so that the connecting cylinder (17) and the distributing disc (12) can move up and down simultaneously with the rotation of the motor (6).
4. A toner-specific classifier according to claim 3, characterized in that, A fixing ring (27) located below the exhaust port (4) is fixedly installed on the top of the inner wall of the grading cylinder (1). The axial cross-section of the fixing ring (27) is "L" shaped. The exhaust port (4) and the air inlet (2) are perpendicular to each other.
5. A toner-specific classifier according to claim 4, characterized in that, The top of the top ring (15) is fixedly installed with a limiting cylinder (16), and the bottom of the support cylinder (5) is located inside the limiting cylinder (16).
6. A toner-specific classifier according to claim 5, characterized in that, Each set of partitions (20) forms a "distribution area" between the distribution plate (12) and the top ring (15), and multiple sets of intercepting strips (19) are fixedly installed at equal intervals at the bottom of the "distribution area".
7. A toner-specific classifier according to claim 6, characterized in that, The intercepting strip (19) has a semi-circular cross-sectional shape and is made of rubber blocks.
8. A toner-specific classifier according to claim 1, characterized in that, The vertical plates (22) are arranged in two groups and are symmetrically distributed on the top of the support plate (21).