Grader special for carbon powder

Abstract

The invention relates to the technical field of graders, and provides a special grader for carbon powder, which comprises a grading cylinder, the outer surface of the grading cylinder is sequentially provided with an exhaust port and an air inlet from top to bottom, the exhaust port and the air inlet are tangent to the outer surface of the grading cylinder, the front side of the air inlet is provided with a fan, and the top of the grading cylinder is fixedly provided with a supporting cylinder. And a feeding opening is formed in the side face of the supporting cylinder, and a motor is installed at the top of the supporting cylinder. According to the device, the material distributing disc can vibrate up and down during rotation, materials in a material distributing area are vibrated to fly up, the materials with small mass gradually move to the upper layer, the materials moving to the upper layer can horizontally move to the outer side of the material distributing disc through the supporting plate and the vertical plate, and the materials with large mass directly and vertically move downwards through the discharging opening; and the gap between the two strands of materials is increased, so that the materials with smaller mass can be quickly separated, and the function of improving the grading efficiency of the device is realized.

Description

Technical Field

[0001] The invention relates to the technical field of classifiers, and in particular to a classifier dedicated to carbon powder. Background Art

[0002] Toner is a commonly used consumable in laser printers and copiers, used to form text and images. Toner is generally prepared mechanically, that is, large pieces of resin and pigment are mixed and crushed into a fine particle mixture by mechanical crushing. The mixture is melted at high temperature to make it a uniform melt. After the mixture cools and solidifies into a block or strip, it is crushed into powder. The last step is to use a special classifier to classify the powder according to particle size. In the prior art, a cyclone eddy current classifier is mainly used to classify toner particles, specifically as follows: the material enters the interior along the top of the classifier and is evenly dispersed to the outside under the centrifugal action of the rotating disk. Then, a cyclone air inlet is installed at the bottom of the device to allow the airflow to enter along the tangential direction of the device and generate a spiral upward airflow, bringing The invention relates to a method for separating small particles of materials and realizing the grading function, but the main means of the prior art is to use the centrifugal effect of the rotating disk to throw the materials into the inner wall of the classifier, so that the negative pressure generated by the spiral upward airflow can drive the lighter materials to move upward, and the heavier materials move downward and are discharged under the action of gravity. Since the distance between the outer side of the rotating disk and the inner wall of the classifier is large, and the negative pressure airflow flowing upward in the spiral is close to the inner wall of the classifier, the small materials mixed with the heavier materials are easy to "go with the flow". Since the movement of the materials on the rotating disk is disordered, it is easy for the heavier materials to cover the lighter materials, and it is easy to form a barrier between them and the spiral upward negative pressure airflow when falling, resulting in low grading efficiency. Therefore, it is urgent to solve the problem. Summary of the invention

[0003] The invention provides a special classifier for carbon powder, which solves the problem of low classification efficiency in the related art.

[0004] The technical solution of the present invention is as follows: a special classifier for carbon powder comprises a classifying cylinder, the outer surface of the classifying cylinder is sequentially provided with an exhaust port and an air inlet from top to bottom, and is tangent to the outer surface of the classifying 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 port is installed on the side of the support cylinder, a motor is installed on the top of the support cylinder, a plurality of groups of pillars are fixedly connected to the middle part of the inner wall of the classifying cylinder, a bottom plate is fixedly installed on one end of the pillar, an adapting groove is opened on the top of the bottom plate, a material distribution plate is arranged above the bottom plate, a limiting column is fixedly connected to the bottom of the material distribution plate, the limiting column is adapted to be engaged in the adapting groove, a connecting cylinder is fixedly installed on the top of the material distribution plate, The output shaft of the motor extends downward into the connecting cylinder and is drivingly connected to the connecting cylinder. A spring is elastically connected between the output shaft of the motor and the inner wall of the connecting cylinder. A plurality of groups of partitions are equidistantly installed on the top circumference of the distribution disk. The top of the partition is fixedly connected to a top ring. There are two partitions in each group and they are distributed parallel to each other. A second shaft and a first shaft are rotatably installed between the two partitions along the radial line of the distribution disk. A limiting plate is movably sleeved on the outer surface of the second shaft, and a support plate is movably sleeved on the outer surface of the first shaft. A plurality of groups of limiting plates are fixedly installed on the outer edge of the top of the distribution disk and a discharge port is opened. Support plates are fixedly connected between each group of partitions, and vertical plates are fixedly connected on the top of the support plates.

[0005] Preferably, the number of the adapting grooves and the limiting columns are both four, and they are all equidistantly distributed around the circumference. The cross-sectional shape of the limiting columns is semicircular, and a gap is left between the bottom of the distribution tray and the top of the base plate.

[0006] Preferably, a spline is provided at the bottom of the outer surface of the motor output shaft, and is slidably engaged with the inner wall of the connecting cylinder, so that the connecting cylinder and the material distribution plate can move up and down simultaneously with the rotation of the motor.

[0007] Preferably, a fixing ring located below the exhaust port is fixedly mounted on the top of the inner wall of the grading cylinder, 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 mounted on the top of the top ring, and the bottom of the supporting cylinder is located inside the limiting cylinder.

[0009] Preferably, each group of the partitions forms a "material distribution area" between the material distribution plate and the top ring, and a plurality of groups of intercepting bars are fixedly installed at equal intervals at the bottom of the "material distribution area".

[0010] Preferably, the rotating shaft 1 is rotatably installed at the vertical midpoint of the partition surface, and when multiple groups of the rotating shaft 1 are rotated to a horizontal position, gaps are left between each other.

[0011] Preferably, the interception strip has a semicircular cross-section and is made of a rubber block.

[0012] Preferably, the maximum rotation angle of the limiting plate is 60°, and when the limiting plate is rotated to a position of 90° toward the support plate, the bottom of the limiting plate is at the same height as the rotating shaft.

[0013] Preferably, the vertical plates are arranged in two groups and are symmetrically distributed front to back on the top of the support plate.

[0014] The working principle and beneficial effects of the present invention are: 1. This device has been redesigned so that the material can be directly layered up and down before leaving the distribution plate, which greatly improves the grading efficiency of the device. This device mainly improves and optimizes the upper surface of the distribution plate, adds multiple groups of partitions, each group of partitions is parallel to each other, and forms a "distribution area" between the distribution plate and the top ring. When the material enters the distribution plate along the support cylinder, it is evenly diverted into the "distribution area" under the action of centrifugation. At this time, the material is intercepted by the interception bar to slow down the movement speed of the material, and the material with smaller mass is subjected to less resistance to accelerate the movement speed of the material with smaller mass. At the same time, the limiting column installed at the bottom of the distribution plate is used in conjunction with the adapter groove opened on the top of the bottom plate, so that the distribution plate can produce an up and down vibration when rotating, and the material in the "distribution area" is vibrated and lifted up, so that the material with smaller mass gradually moves to the upper layer. The material moving to the upper layer can be horizontally moved to the outside of the distribution plate through the support plate and the vertical plate, while the material with larger mass is directly vertically downward through the discharge port, increasing the gap between the two strands of material, so that the material with smaller mass can be quickly separated, thereby realizing the function of improving the grading efficiency of the device.

[0015] 2. The function of the "material distribution area" set in this device is to cooperate with the up and down vibration of the material distribution plate to divert two streams of materials of different masses. By opening a discharge port on the top of the material distribution plate and installing a limiting plate near the discharge port, the material with larger mass that is distributed to the lower layer through 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 basically belongs to the part with larger mass, mixed with a small amount of smaller mass material. By setting a support plate and a vertical plate at the opening of the "material distribution area", the passing area of ​​the material is reduced, and the negative pressure pushes the material to the outside to increase, so that the material in the "material distribution area" is prevented from being blocked.

[0016] 3. The rotating shaft 2 of the device is made of cast iron material, and its maximum eversion angle is designed to be 60° relative to the vertical line. This is to limit the passing area of ​​the material entering the "distribution area" and prevent the height of the material in the "distribution area" from being higher than the rotating shaft 1 and the support plate rotated to a horizontal state. The device controls the amount of material entering the "distribution area" by setting a limiting flow plate and designing its rotation angle. At the same time, the support plate is pushed and supported by the material after entering the "distribution area" to make the support plate horizontal. This design provides support space for small-mass materials moving to the upper layer, avoids the smaller mass materials from being mixed with the larger mass materials again, and effectively improves the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Figure 1 It is a schematic diagram of the appearance of the overall structure of the present invention; Figure 2 It is a front cutaway schematic diagram of the overall structure of the present invention; Figure 3 For the present invention Figure 2 A magnified schematic diagram of the structure at center A; Figure 4 For the present invention Figure 2 A magnified schematic diagram of the structure at B in the middle; Figure 5 It is a side partial cutaway schematic diagram of the overall structure of the present invention; Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structure at C in the middle; Figure 7 This is a schematic diagram of the internal structure of the "material distribution area" of the present invention; Figure 8 It is a schematic diagram of the separation of the local structure of the present invention; Fig. 9 It is a schematic diagram of the separation of the "material distribution zone" of the present invention.

[0019] In the figure: 1. grading cylinder; 2. air inlet; 3. fan; 4. exhaust port; 5. support cylinder; 6. motor; 61. spline; 7. feed port; 8. support; 9. bottom plate; 10. adapter groove; 11. limit column; 12. distribution plate; 13. discharge port; 14. limit plate; 15. top ring; 16. limit cylinder; 17. connecting cylinder; 18. spring; 19. intercepting strip; 20. partition; 21. support plate; 22. vertical plate; 23. rotating shaft 1; 24. support plate; 25. rotating shaft 2; 26. flow limiting plate; 27. fixing ring. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] like Figures 1 to 9 As shown, an embodiment of the present invention provides a special classifier for carbon powder, including a classifying cylinder 1, the outer surface of the classifying cylinder 1 is sequentially provided with an exhaust port 4 and an air inlet 2 from top to bottom, and is tangent to the outer surface of the classifying 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 classifying cylinder 1, a feed port 7 is installed on the side of the support cylinder 5, a motor 6 is installed on the top of the support cylinder 5, a plurality of groups of pillars 8 are fixedly connected to the middle of the inner wall of the classifying cylinder 1, a bottom plate 9 is fixedly installed at one end of the pillar 8, an adapting groove 10 is opened on the top of the bottom plate 9, a material distribution plate 12 is arranged above the bottom plate 9, a limiting column 11 is fixedly connected to the bottom of the material distribution plate 12, the limiting column 11 is adapted to be engaged in the adapting groove 10, a connecting cylinder 17 is fixedly installed on the top of the material distribution plate 12, and the output axial direction of the motor 6 It extends downward into the connecting tube 17 and is drivingly connected with the connecting tube 17. A spring 18 is elastically connected between the output shaft of the motor 6 and the inner wall of the connecting tube 17. A plurality of groups of partitions 20 are equidistantly installed on the top circumference of the distribution disk 12. The top of the partition 20 is fixedly connected to the top ring 15. There are two partitions 20 in each group and they are distributed parallel to each other. A rotating shaft 25 and a rotating shaft 1 23 are installed between the two partitions 20 so as to rotate in sequence along the radial line of the distribution disk 12. The outer surface of the rotating shaft 25 is movably sleeved with a limiting plate 26. The outer surface of the rotating shaft 1 23 is movably sleeved with a supporting plate 24. A plurality of groups of limiting plates 14 are fixedly installed on the outer edge of the top of the distribution disk 12, and a discharge port 13 is opened. A support plate 21 is fixedly connected between each group of partitions 20, and a vertical plate 22 is fixedly connected to the top of the support plate 21. The device has been redesigned so that the material can be directly layered up and down before leaving the material distribution plate 12, which greatly improves the grading efficiency of the device. The device mainly improves and optimizes the upper surface of the material distribution plate 12, and adds multiple groups of partitions 20. Each group of partitions 20 is parallel to each other and forms a "material distribution area" between the material distribution plate 12 and the top ring 15. When the material enters the material distribution plate 12 along the support tube 5, it is evenly divided into the "material distribution area" under the action of centrifugation. At this time, the material is intercepted by the interception bar 19 to slow down the movement speed of the material, and the material with smaller mass is accelerated by the property of less resistance to the material with smaller mass. The movement speed of the material, at the same time, by using the limit column 11 installed at the bottom of the distribution plate 12, cooperating with the adapter groove 10 opened on the top of the bottom plate 9, the distribution plate 12 can produce an up and down vibration when rotating, and the material in the "distribution area" is vibrated and lifted up, so that the material with smaller mass gradually moves to the upper layer, and the material moved to the upper layer can be horizontally moved to the outside of the distribution plate 12 through the support plate 21 and the vertical plate 22, while the material with larger mass is directly vertically downward through the discharge port 13, thereby increasing the gap between the two materials and enabling the material with smaller mass to be quickly separated, thereby realizing the function of improving the grading efficiency of the device.

[0022] There are four adapter grooves 10 and four limit posts 11, which are equidistantly distributed around the circumference. The cross-sectional shape of the limit posts 11 is semicircular, and a gap is left between the bottom of the material distribution plate 12 and the top of the bottom plate 9. The limiting column 11 is adapted to be connected in the adapting groove 10, and the bottom plate 9 is fixed. When the distributing disc 12 drives the limiting column 11 to rotate, the limiting column 11 is bound to be separated from the inside of the adapting groove 10, and drive the distributing disc 12 and the connecting tube 17 to move upward as a whole under the limiting action of the upper surface of the bottom plate 9, thereby compressing the spring 18. When the limiting column 11 moves to a position overlapping with the next set of adapting grooves 10, the connecting tube 17, the distributing disc 12 and the limiting column 11 as a whole will inevitably move downward under the clamping of their own weight and the elastic force of the spring 18, thereby realizing the up and down vibration function of the distributing disc 12, providing the material in the "distributing area" with a vibration flying function, and effectively realizing the material grading function.

[0023] Among them, 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 tube 17, so that the connecting tube 17 and the material distribution plate 12 can move up and down simultaneously with the rotation of the motor 6; The spline 61 not only enables the motor 6 to drive the connecting tube 17 and the material distribution plate 12 to rotate, but also, when the material distribution plate 12 moves up and down under the action of the limiting column 11 and the adapter groove 10, the connecting tube 17 can move relative to the surface of the motor 6 without getting stuck.

[0024] Among them, a fixing ring 27 located below the exhaust port 4 is fixedly installed on the top of the inner wall of the classification cylinder 1, and the axial cross-section shape of the fixing ring 27 is "L"-shaped, and the exhaust port 4 and the air inlet 2 are perpendicular to each other; like Figure 2 As shown, the fixing ring 27 cooperates with the fan 3 to form a spiral upward negative pressure airflow to carry away materials with smaller mass.

[0025] The top of the top ring 15 is fixedly mounted with a limiting cylinder 16, and the bottom of the supporting cylinder 5 is located inside the limiting cylinder 16; The top ring 15 is connected to the limiting cylinder 16 to limit the material falling from the supporting cylinder 5 so that it can completely enter the "distribution area" on the upper surface of the distribution plate 12. The setting of the top ring 15 forms a centrifugal discharge channel between it, the partition 20 and the distribution plate 12.

[0026] Each set of partitions 20 forms a "material distribution area" with the material distribution plate 12 and the top ring 15, and a plurality of interception bars 19 are fixedly installed at equal intervals at the bottom of the "material distribution area"; The function of the "material distribution area" is to cooperate with the up and down vibration of the material distribution plate 12 to divert two streams of materials of different masses. A discharge port 13 is opened on the top of the material distribution plate 12, and a limiting plate 14 is installed near the discharge port 13, so that the larger mass material distributed to the lower layer after 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 basically belongs to the larger mass part, which is mixed with a small amount of smaller mass material. The support plate 21 and the vertical plate 22 are arranged at the opening of the "material distribution area" to reduce the passing area of ​​the material, increase the negative pressure to push the material outward, and prevent the material from being blocked in the "material distribution area".

[0027] The rotating shaft 1 23 is rotatably mounted at the vertical midpoint of the surface of the partition 20, and when the multiple sets of rotating shafts 1 23 are rotated to a horizontal position, gaps are left between each other; The rotating shaft 23 is located at the vertical midpoint of the partition 20, and it automatically rotates to a horizontal position under the push of the material and the centrifugal action. The horizontally placed rotating shaft 23 can provide a platform for the smaller mass materials moving to the upper layer.

[0028] The cross-sectional shape of the interception strip 19 is semicircular, and the interception strip 19 is made of a rubber block; The interception bar 19 is used to intercept the material at the bottom layer, slow down the movement speed of the material under the centrifugal action, and provide time conditions for the material distribution in the "material distribution area" of the device.

[0029] The maximum rotation angle of the limiting plate 26 is 60°. When the limiting plate 26 is rotated to a position of 90° toward the support plate 24, the bottom of the limiting plate 26 is at the same height as the rotation shaft 1 23. The rotating shaft 25 is made of cast iron material, and its maximum eversion angle is designed to be 60° relative to the vertical line. This is to limit the passing area of ​​the material entering the "distribution area" and prevent the height of the material in the "distribution area" from being higher than the rotating shaft 1 23 and the support plate 24 rotated to a horizontal state. The device controls the amount of material entering the "distribution area" by setting a limiting flow plate 26 with its rotation angle design. At the same time, the support plate 24 is pushed and supported by the material after entering the "distribution area" to make the support plate 24 horizontal. This design provides support space for small mass materials moving to the upper layer, avoids the small mass materials from being mixed with the large mass materials again, and effectively improves the practicality of the device.

[0030] The vertical plates 22 are arranged in two groups and are symmetrically distributed on the top of the support plate 21; The support plate 21 and the vertical plate 22 are discharge passages for materials with smaller mass, and their relatively narrow passing space enables the materials to be discharged efficiently.

[0031] Working principle: First, the fan 3 is started, and positive pressure air is blown into the inner cavity of the classification cylinder 1 along the tangent line of the surface of the classification cylinder 1 through the air inlet 2. The airflow spirals upward along the inner wall area of ​​the classification cylinder 1 and is discharged along the exhaust port 4. An upward negative pressure is generated in the area of ​​the inner wall of the classification cylinder 1, and the material is poured into the interior of the support cylinder 5 through the feed port 7. At the same time, the motor 6 is started to drive the connecting cylinder 17 and the material distribution plate 12 to rotate; Then, the material enters the upper surface area of ​​the distribution plate 12 along the gap between the supporting tube 5 and the connecting tube 17. Under the centrifugal effect generated by the rotation of the distribution plate 12, the material moves along the radial line of the distribution plate 12 toward the side of the axis away from the distribution plate 12 and enters the "distribution area". At the same time, the distribution plate 12 drives the limiting column 11 to rotate. Since the limiting column 11 is stuck in the adapting groove 10, when the limiting column 11 is driven by the distribution plate 12 to rotate and leaves the inside of the adapting groove 10, at this time, since the bottom plate 9 is fixed, the distribution plate 12 and the limiting column 11 are pushed upward by the upper surface of the bottom plate 9 as a whole. At this time, the distribution plate 12 drives the connecting tube 17 to move upward relative to the motor 6 and compresses the spring 18. Every time the distribution plate 12 rotates 90°, the limiting column 11 is driven to re-enter the adapting groove 10, so that the distribution plate 12 as a whole can achieve four up and down vibrations every time it rotates one circle; Then, the up and down vibration of the distribution plate 12 drives the material in the "distribution area" upward and disperses it. In the "distribution area", the rotating shaft 25 and the supporting plate 24 are driven by the centrifugal force generated by the rotation of the distribution plate 12, and begin to rotate and rotate a certain angle toward the side of 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 rotates 60°, the distance between its bottom and the top of the distribution plate 12 remains constant, which limits the area where the material passes, so that the material entering the "distribution area" will not be high. The support plate 24 rotates to a horizontal state toward one side of the limiting plate 14 under the push of the material. At this time, the material with smaller mass begins to move to the upper surface of the support plate 24 after the up and down vibration and tumbling, and gradually forms upper and lower layers with the material with larger mass. The material with smaller mass begins to pass through the support plate 24 and moves to the support plate 21. Driven by the spiral upward negative pressure airflow in the inner cavity of the grading cylinder 1, the material is discharged along the exhaust port 4, while the material with larger mass located on the lower side directly moves vertically downward along the discharge port 13 and is discharged.

[0032] The above are only 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 in the protection scope of the present invention.

Claims

1. A classifier for carbon powder, comprising a classifying cylinder (1), the outer surface of the classifying cylinder (1) being provided with an exhaust port (4) and an air inlet (2) in sequence from top to bottom and being tangent to the outer surface of the classifying cylinder (1), a fan (3) being provided in front of the air inlet (2), a support cylinder (5) being fixedly provided on the top of the classifying cylinder (1), a feed port (7) being provided on the side of the support cylinder (5), and a motor (6) being provided on the top of the support cylinder (5), characterized in that: A plurality of groups of pillars (8) are fixedly connected to the middle of the inner wall of the grading cylinder (1), a bottom plate (9) is fixedly mounted on one end of the pillar (8), an adapting groove (10) is provided on the top of the bottom plate (9), a material distribution plate (12) is arranged above the bottom plate (9), a limiting column (11) is fixedly connected to the bottom of the material distribution plate (12), the limiting column (11) is adapted to be snap-fitted into the adapting groove (10), a connecting cylinder (17) is fixedly mounted on the top of the material distribution plate (12), an output shaft of the motor (6) extends downward into the connecting cylinder (17) and is transmission-connected to the connecting cylinder (17), a spring (18) is elastically connected between the output shaft of the motor (6) and the inner wall of the connecting cylinder (17), and the top of the material distribution plate (12) is provided with a plurality of pillars (8) fixedly connected to the middle of the inner wall of the connecting cylinder (17), and a plurality of pillars (8) are provided on the top of the material distribution plate (12). A plurality of groups of partitions (20) are equidistantly installed on the circumference, the tops of the partitions (20) are fixedly connected to the top ring (15), the number of the partitions (20) in each group is two and they are arranged parallel to each other, a second rotating shaft (25) and a first rotating shaft (23) are rotatably installed between the two partitions (20) along the radial line of the material distribution plate (12), the outer surface of the second rotating shaft (25) is movably sleeved with a limiting plate (26), the outer surface of the first rotating shaft (23) is movably sleeved with a support plate (24), a plurality of groups of limiting plates (14) are fixedly installed on the outer edge of the top of the material distribution plate (12), and a discharge port (13) is opened, a support plate (21) is fixedly connected between each group of the partitions (20), and a vertical plate (22) is fixedly connected to the top of the support plate (21).

2. A carbon powder classifier according to claim 1, characterized in that: The number of the adapting grooves (10) and the limiting columns (11) are both four, and they are all equidistantly distributed around the circumference; the cross-sectional shape of the limiting columns (11) is semicircular; and a gap is left between the bottom of the material distribution plate (12) and the top of the bottom plate (9).

3. A carbon powder classifier according to claim 2, characterized in that: A spline (61) is provided at the bottom of the outer surface of the output shaft of the motor (6) and is slidably engaged with the inner wall of the connecting cylinder (17), so that the connecting cylinder (17) and the material distribution plate (12) can move up and down simultaneously with the rotation of the motor (6).

4. A carbon powder classifier according to claim 3, characterized in that: A fixing ring (27) located below the exhaust port (4) is fixedly mounted on the top of the inner wall of the classification cylinder (1); the fixing ring (27) has an axial cross-section in an "L" shape; and the exhaust port (4) and the air inlet (2) are perpendicular to each other.

5. A carbon powder classifier according to claim 4, characterized in that: A limiting cylinder (16) is fixedly mounted on the top of the top ring (15), and the bottom of the supporting cylinder (5) is located inside the limiting cylinder (16).

6. A carbon powder classifier according to claim 5, characterized in that: Each group of the partition plates (20) forms a "material distribution area" between the material distribution plate (12) and the top ring (15), and a plurality of groups of intercepting bars (19) are fixedly installed at equal intervals at the bottom of the "material distribution area".

7. A carbon powder classifier according to claim 6, characterized in that: The rotating shaft 1 (23) is rotatably mounted at the vertical midpoint of the surface of the partition (20), and when the plurality of groups of the rotating shaft 1 (23) are rotated to a horizontal position, gaps are left between each other.

8. A carbon powder classifier according to claim 7, characterized in that: The interception strip (19) has a semicircular cross-sectional shape, and the interception strip (19) is made of a rubber block.

9. A carbon powder classifier according to claim 8, characterized in that: The maximum rotation angle of the limiting plate (26) is 60°, and when the limiting plate (26) is rotated to a position of 90° toward the support plate (24), the bottom of the limiting plate (26) is at the same height as the rotating shaft 1 (23).

10. A carbon powder classifier according to claim 9, characterized in that: The vertical plates (22) are arranged in two groups and are symmetrically distributed front and back on the top of the support plate (21).

Images