Wind power grader for dry grinding and dry grinding of ultra-fine powder
By designing an air classifier for drying ultrafine powders, and utilizing grinding and multi-stage airflow classification, the problems of particle obstruction and agglomeration in air classifiers are solved, achieving efficient classification and storage of ultrafine powders.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2026-03-20
AI Technical Summary
In the existing air classifier process for classifying ultrafine powders, larger particles tend to block the flow of smaller particles, resulting in a decrease in classification efficiency. Furthermore, ultrafine powders are prone to clumping during transportation, affecting subsequent processing.
An ultrafine powder dry grinding and drying air classifier was designed, which includes a separation mechanism and a blower mechanism. The grinding mechanism crushes agglomerated powder, and different blowers blow out different airflows for classification. Combined with the filter holes of the separation mechanism, the particles are separated to achieve multiple classifications.
It effectively improves the classification effect of ultrafine powder, avoids the impact of agglomeration on the classification process, and ensures the effective separation and storage of smaller particles.
Smart Images
Figure CN224009885U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a wind force classifier, concretely relates to a super micro powder dry grinding dry selection wind force classifier. BACKGROUND
[0002] In the present social production process, material grinding into powder is an important production project, among them, the super micro powder grinder is a kind of commonly used equipment for grinding superhard material into nanometer micro powder, after the super micro powder grinder completes grinding material, there is powder with different particle sizes in the super micro powder, to facilitate subsequent staff to process the super micro powder particles with different sizes, it is usually needed to carry out grading treatment to the super micro powder by classifier, and the grading mode of powder classifier is various, among them, the wind force classifier is a commonly used classifier for super micro powder grading, the existing wind force classifier mostly makes super micro powder fall in the process of use, and simultaneously blows the super micro powder by fan blowing, under the action of wind force, the super micro powder with smaller particles changes falling direction following airflow flow, and the super micro powder with larger particles continues to fall to realize grading treatment, since super micro powder contacts each other in the process of falling, when airflow blows the super micro powder, the super micro powder with larger particles is prone to block the super micro powder with smaller particles, so that the super micro powder with smaller particles is difficult to flow following airflow, resulting in that the material distribution effect of wind force classifier on super micro powder is reduced, and simultaneously, in the transportation process of grading treatment of super micro powder, super micro powder particles are prone to agglomerate due to extrusion and friction between each other, and the quality of agglomerated super micro powder increases, which affects subsequent grading treatment, in view of the above, the utility model provides a kind of super micro powder dry grinding dry selection wind force classifier. CONTENT OF UTILITY MODEL
[0003] The utility model is purposed at providing a kind of super micro powder dry grinding dry selection wind force classifier, to solve the problems raised in the above background.
[0004] To achieve the above object, the utility model provides a kind of super-fine powder dry grinding dry selection wind classifier, including classifier main body, the inside of the classifier main body is provided with partition mechanism, the inside of the classifier main body is separated into first material distributing chamber, first storage chamber, second material distributing chamber and second storage chamber by the partition mechanism, the first material distributing chamber and second material distributing chamber are used to wind classification super-fine powder, the first storage chamber and second storage chamber are used to store the super-fine powder after classification, the top of the classifier main body is provided with feeding mechanism, the feeding mechanism is used to smash the super-fine powder of lump, the feeding mechanism includes the feeding hopper fixedly arranged at the top of the classifier main body, the feeding hopper is connected with first material distributing chamber, the inner wall of the feeding hopper is connected with the position of first material distributing chamber with arc grinding surface with grinding protrusion on surface, the inside of the feeding hopper is provided with rotatable grinding disc, the distance between the outer wall of the grinding disc and grinding surface gradually decreases from top to bottom, the grinding disc is smashed in the process of rotation with grinding surface lump super-fine powder, the outside of the classifier main body is annularly arranged and provided with first air blowing mechanism, second air blowing mechanism and third air blowing mechanism, the first air blowing mechanism and second air blowing mechanism and third air blowing mechanism blow out airflow with different flow rates, the first air blowing mechanism and second air blowing mechanism are connected with first material distributing chamber, the third air blowing mechanism is connected with second material distributing chamber.
[0005] As a further improvement of the technical solution, the partition mechanism includes a horizontal plate fixedly arranged inside the classifier main body, the upper surface and the lower surface of the horizontal plate are respectively fixedly provided with an upper partition plate in Y shape and a lower partition plate in V shape, a large-diameter filter hole penetrating through the upper partition plate is formed in one side wall of the upper partition plate, the first material distributing chamber and the second material distributing chamber are connected through the large-diameter filter hole of the upper partition plate, a small-diameter filter hole penetrating through the upper partition plate is formed in the other side wall of the upper partition plate, the first material distributing chamber and the first storage chamber are connected through the small-diameter filter hole of the upper partition plate, a small-diameter filter hole penetrating through the lower partition plate is formed in one side wall of the lower partition plate, the second material distributing chamber and the second storage chamber are connected through the small-diameter filter hole, a small-diameter filter hole penetrating through the horizontal plate is formed in one side of the horizontal plate, the first material distributing chamber and the second material distributing chamber are connected through the small-diameter filter hole of the horizontal plate.
[0006] As a further improvement of the technical solution, the feeding mechanism further includes an oil cylinder fixedly arranged on the inner wall of the feeding hopper near the top position, a fixed frame is fixedly arranged at the piston end of the oil cylinder, the piston end of the oil cylinder drives the fixed frame to move when stretching and retracting, a first motor is fixedly arranged at the top of the fixed frame, the output shaft of the first motor penetrates through the fixed frame and is coaxially connected with the top of the grinding disc, the output shaft of the first motor rotates to drive the grinding disc to rotate.
[0007] As a further improvement of the technical solution, the opposite side walls of the fixing frame are symmetrically provided with two cleaning scrapers, the cleaning scraper is fixedly provided with a cleaning brush close to the surface of the grinding disc, and the cleaning brush is in sliding contact with the surface of the grinding disc.
[0008] As a further improvement of the technical solution, the first, second and third air blowing mechanisms each include a mounting seat fixedly arranged at a position close to the middle of the side wall of the classifier main body, a rotating rod is rotatably arranged in the mounting seat, one end of the rotating rod close to the classifier main body extends into the interior of the classifier main body and is fixedly provided with a plurality of fan blades, and the rotating rod drives the fan blades to rotate to generate airflow during rotation.
[0009] As a further improvement of the technical solution, the first, second and third air blowing mechanisms each include a mounting seat fixedly arranged at a position close to the middle of the side wall of the classifier main body, a rotating rod is rotatably arranged in the mounting seat, one end of the rotating rod close to the classifier main body extends into the interior of the classifier main body and is fixedly provided with a plurality of fan blades, and the rotating rod drives the fan blades to rotate to generate airflow during rotation.
[0010] Compared with the prior art, the present application has the following advantages:
[0011] 1. The wind classifier is used for dry grinding and selecting of ultra-fine powder, the agglomerated ultra-fine powder is crushed by the grinding mechanism, the influence of the agglomeration of the ultra-fine powder on subsequent classification is avoided, the crushed ultra-fine powder falls into the interior of the first material distribution chamber, at this time, the first air blowing mechanism blows out the main airflow to drive the ultra-fine powder to flow, at the same time, the second air blowing mechanism blows out the first airflow to collide with the main airflow, the first airflow drives the ultra-fine powder with smaller particles into the interior of the first storage chamber, at this time, the remaining ultra-fine powder is driven into the interior of the second material distribution chamber under the action of the main airflow, at this time, the third air blowing mechanism blows out the second airflow to collide with the main airflow, the second airflow drives the ultra-fine powder with smaller particles into the interior of the second storage chamber, at the same time, the smaller particles in the remaining ultra-fine powder in the second material distribution chamber are driven to re-enter the interior of the first material distribution chamber to be subjected to repeated classification under the action of the main airflow, so that the classification effect of the wind classifier on the ultra-fine powder is effectively improved. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 It is a schematic diagram of the overall structure of the present application;
[0013] Figure 2 It is one of the schematic diagrams of the overall cross-sectional structure of the present application;
[0014] Figure 3 It is the second whole cross section structure schematic view of the utility model;
[0015] Figure 4 It is the first cross section structure schematic view of the air blowing mechanism in the utility model;
[0016] Figure 5 It is the second cross section structure schematic view of the air blowing mechanism in the utility model;
[0017] Figure 6 It is the first three-dimensional structure schematic view of the separating mechanism in the utility model;
[0018] Figure 7 It is the second three-dimensional structure schematic view of the separating mechanism in the utility model;
[0019] Figure 8 It is the cross section structure schematic view of the feeding mechanism and the classifier main body combination in the utility model.
[0020] The meaning of each mark in the figure is:
[0021] 1, the classifier main body; A, first material distributing cavity; B, first material storage cavity; C, second material distributing cavity; D, second material storage cavity;
[0022] 2, separating mechanism; 21, horizontal plate; 22, upper partition plate; 23, lower partition plate;
[0023] 3, feeding mechanism; 31, feeding hopper; 32, grinding surface; 33, oil cylinder; 34, fixed frame; 35, first motor; 36, grinding disc; 37, cleaning scraper
[0024] 4, first air blowing mechanism; 41, mounting frame; 42, second motor; 43, mounting seat; 44, rotating rod; 45, fan blade; 46, mounting shell; 47, belt pulley; 48, narrow V belt;
[0025] 5, second air blowing mechanism;
[0026] 6, third air blowing mechanism. DETAILED DESCRIPTION
[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0028] Embodiment 1
[0029] Please refer to Figure 1 - Figure 8 As shown in the drawings, one of the purposes of the present embodiment is to provide a wind classifier for dry grinding and dry sorting of ultra-fine powder, which comprises a classifier main body 1, a partition mechanism 2 is arranged inside the classifier main body 1, the partition mechanism 2 separates the inside of the classifier main body 1 into a first material separation cavity A, a first material storage cavity B, a second material separation cavity C and a second material storage cavity D, the first material separation cavity A and the second material separation cavity C are used for wind classification of ultra-fine powder, the first material storage cavity B and the second material storage cavity D are used for storing the classified ultra-fine powder, the partition mechanism 2 comprises a horizontal plate 21 fixedly arranged inside the classifier main body 1, the horizontal plate 21 is fan-shaped, the upper surface and the lower surface of the horizontal plate 21 are respectively fixedly provided with an upper partition plate 22 in Y shape and a lower partition plate 23 in V shape, a large-diameter filter hole penetrating through the upper partition plate 22 is formed in one side wall of the upper partition plate 22, the first material separation cavity A and the second material separation cavity C are communicated through the large-diameter filter hole of the upper partition plate 22, a small-diameter filter hole penetrating through the upper partition plate 22 is formed in the other side wall of the upper partition plate 22, the first material separation cavity A and the first material storage cavity B are communicated through the small-diameter filter hole, a small-diameter filter hole penetrating through the lower partition plate 23 is formed in one side wall of the lower partition plate 23, the second material separation cavity C and the second material storage cavity D are communicated through the small-diameter filter hole of the lower partition plate 23, a small-diameter filter hole penetrating through the horizontal plate 21 is formed in one side of the horizontal plate 21, the first material separation cavity A and the second material separation cavity C are communicated through the small-diameter filter hole of the horizontal plate 21.
[0030] Reference Figure 6 and Figure 7, the obtuse angle region formed by the large-diameter filter hole and the small-diameter filter hole on the Y-shaped upper partition plate 22 and the first classification chamber body 1 and the horizontal plate 21 form a first material distribution cavity A, the acute angle region formed by the side wall of the small-diameter filter hole and the side wall without filter hole on the Y-shaped upper partition plate 22 and the first classification chamber body 1 and the horizontal plate 21 form a first storage cavity B, the acute angle region of the V-shaped lower partition plate 23 and the first classification chamber body 1 and the horizontal plate 21 form a second storage cavity D, the side wall of the V-shaped lower partition plate 23 with the small-diameter filter hole is in the same plane with the side wall of the Y-shaped upper partition plate 22 with the large-diameter filter hole, the side wall of the V-shaped lower partition plate 23 without filter hole is between the side wall of the Y-shaped upper partition plate 22 with the large-diameter filter hole and the small-diameter filter hole, the small-diameter filter hole on the horizontal plate 21 is between the side wall of the V-shaped lower partition plate 23 without filter hole and the side wall of the Y-shaped upper partition plate 22 with the small-diameter filter hole, the obtuse angle region of the V-shaped lower partition plate 23, the side wall of the Y-shaped upper partition plate 22 with the large-diameter filter hole and the side wall without filter hole and the inner wall of the first classification chamber body 1 form a second material distribution cavity C, the first air blowing mechanism 4, the second air blowing mechanism 5 and the third air blowing mechanism 6 are arranged in a ring shape on the outside of the first classification chamber body 1, the first air blowing mechanism 4 and the second air blowing mechanism 5 blow out airflow with different flow rates from the third air blowing mechanism 6, the first air blowing mechanism 4 and the second air blowing mechanism 5 are in communication with the first material distribution cavity A, the third air blowing mechanism 6 is in communication with the second material distribution cavity C, the worker pours the ultra-fine powder into the inside of the first material distribution cavity A, at the same time, the first air blowing mechanism 4 blows out the main airflow to drive the ultra-fine powder to flow in the inside of the first material distribution cavity A, at this time, the second air blowing mechanism 5 blows out the first airflow to form a butt joint with the main airflow, under the blowing of the first airflow, the ultra-fine powder with smaller particles follows the first airflow to pass through the small-diameter filter hole on the upper partition plate 22 to enter the inside of the first storage cavity B for storage, then the ultra-fine powder in the inside of the first material distribution cavity A follows the main airflow to pass through the large-diameter filter hole on the upper partition plate 22 to enter the inside of the second material distribution cavity C, at this time, the third air blowing mechanism 6 blows out the second airflow to form a butt joint with the main airflow, under the blowing of the second airflow, the ultra-fine powder with smaller particles follows the second airflow to pass through the small-diameter filter hole on the lower partition plate 23 to enter the inside of the second storage cavity D for storage, then, the ultra-fine powder with smaller particles remaining in the inside of the second material distribution cavity C follows the main airflow to pass through the small-diameter filter hole on the horizontal plate 21 to enter the inside of the first material distribution cavity A for repeated classification treatment, thereby effectively improving the classification effect of the classification machine on the ultra-fine powder.
[0031] The gas flow rate of the main gas flow is greater than that of the first and second sub-gas flows, and the wind force between the first and second sub-gas flows is adjusted according to the size of the particles to be screened, that is, when the first sub-gas flow needs to screen larger particles than the second sub-gas flow, the gas flow rate of the first sub-gas flow is greater than that of the second sub-gas flow, and when the first sub-gas flow needs to screen smaller particles than the second sub-gas flow, the gas flow rate of the first sub-gas flow is less than that of the second sub-gas flow, and the gas flow rate of the main gas flow is determined according to the size of the largest particles to be screened in the particles.
[0032] In the transportation process of ultra-fine powder for classification treatment, the particles of ultra-fine powder are easily agglomerated due to extrusion and friction between each other. The increase in mass of agglomerated ultra-fine powder affects the subsequent classification treatment. In order to avoid the influence of agglomerated ultra-fine powder on the subsequent classification treatment, a feeding mechanism 3 is arranged at the top of the classifier main body 1. The feeding mechanism 3 is used to crush the agglomerated ultra-fine powder. The feeding mechanism 3 includes a feeding hopper 31 fixedly arranged at the top of the classifier main body 1. The feeding hopper 31 is in communication with the first sub-chamber A. An arc-shaped grinding surface 32 with grinding lugs is arranged on the inner wall of the feeding hopper 31 near the bottom. A rotatable grinding disc 36 is arranged in the feeding hopper 31. The distance between the outer wall of the grinding disc 36 and the grinding surface 32 decreases from top to bottom. The grinding disc 36 cooperates with the grinding surface 32 to crush the agglomerated ultra-fine powder during rotation.
[0033] The feeding mechanism 3 further comprises a hydraulic cylinder 33 fixedly arranged on one side of the inner wall of the feeding hopper 31 close to the top, the hydraulic cylinder 33 is connected with an external hydraulic station, a fixed frame 34 is fixedly arranged on the piston end of the hydraulic cylinder 33, the piston end of the hydraulic cylinder 33 drives the fixed frame 34 to move when stretching and retracting, a first motor 35 is fixedly arranged on the top of the fixed frame 34, the output shaft of the first motor 35 penetrates through the fixed frame 34 and is coaxially and drivingly connected with the top of the grinding disc 36, the output shaft of the first motor 35 drives the grinding disc 36 to rotate, two cleaning scrapers 37 are symmetrically fixedly arranged on the opposite side walls of the fixed frame 34, cleaning brushes are fixedly arranged on the surfaces of the cleaning scrapers 37 close to the grinding disc 36, the cleaning brushes are in sliding contact with the surface of the grinding disc 36, and the cleaning brushes clean the surface of the grinding disc 36 in the process of rotation of the grinding disc 36, the staff pours the ultra-fine powder between the feeding hopper 31 and the grinding disc 36, at this time, the ultra-fine powder is located on one side of the cleaning scraper 37, and the output shaft of the first motor 35 drives the grinding disc 36 to rotate, the caked ultra-fine powder enters between the grinding disc 36 and the grinding surface 32 in the process of rotation of the grinding disc 36, the rotating grinding disc 36 cooperates with the grinding surface 32 to crush the caked ultra-fine powder, the crushed ultra-fine powder enters the inside of the first distribution cavity A, meanwhile, the cleaning brushes on the cleaning scrapers 37 brush off the ultra-fine powder adhered to the surface of the grinding disc 36, so that the ultra-fine powder is prevented from splashing along with the rotating grinding disc 36, and when the ultra-fine powder with different particle requirements is targeted, the piston end of the hydraulic cylinder 33 stretches and retracts to drive the first motor 35 and the grinding disc 36 to move through the fixed frame 34, so that the gap between the grinding disc 36 and the grinding surface 32 is adjusted, so as to crush the caked ultra-fine powder into different sizes of particles.
[0034] The first air blowing mechanism 4, the second air blowing mechanism 5 and the third air blowing mechanism 6 each comprise a mounting seat 43 fixedly arranged at a position close to the middle of the side wall of the classifier main body 1, a rotating rod 44 is rotatably arranged in the mounting seat 43, the rotating rod 44 extends to the inside of the classifier main body 1 at a position close to the classifier main body 1 and is fixedly provided with a plurality of fan blades 45, the rotating rod 44 drives the fan blades 45 to rotate to generate airflow in the rotating process, the first air blowing mechanism 4, the second air blowing mechanism 5 and the third air blowing mechanism 6 further comprise a mounting frame 41 fixedly arranged at the top of the classifier main body 1, the mounting frame 41 and the mounting seat 43 are fixedly provided with a mounting shell 46 at a position away from the classifier main body 1, a second motor 42 is fixedly arranged on the upper surface of the mounting frame 41, the output shaft of the second motor 42 and the rotating rod 44 extend to the inside of the mounting shell 46 at a position away from the classifier main body 1 and are coaxially fixedly provided with a belt pulley 47, two narrow V-belts 48 are sleeved on the outer sides of the belt pulleys 47, the narrow V-belts 48 are SPZ or SPC type narrow V-belts, the narrow V-belts 48 belong to a kind of triangular belts, compared with ordinary V-belts, the cross-sectional shape of the narrow V-belts 48 is narrower, can transmit larger power in smaller space, has higher transmission efficiency and compactness, one of the belt pulleys 47 is driven to rotate by the output shaft of the second motor 42, another belt pulley 47 is driven to rotate by the narrow V-belt 48, and the rotating belt pulleys 47 drive the fan blades 45 to rotate by the rotating rod 44 to blow airflow with different wind force.
[0035] In summary, the working process of the present scheme is as follows: the worker pours the ultra-fine powder into the inside of the feeding hopper 31, at this time the output shaft of the first motor 35 drives the grinding disc 36 to rotate, the grinding disc 36 crushes the caked ultra-fine powder in the rotating process and makes the crushed ultra-fine powder enter the inside of the first distribution cavity A, at the same time the first air blowing mechanism 4 blows the main airflow to blow the ultra-fine powder, at this time the second air blowing mechanism 5 blows the first sub-airflow to blow the smaller particles of the ultra-fine powder in the main airflow to enter the inside of the first storage cavity B through the small-diameter filter holes on the upper partition plate 22, then the main airflow blows the ultra-fine powder to enter the inside of the second distribution cavity C through the large-diameter filter holes on the upper partition plate 22, at this time the third air blowing mechanism 6 blows the second sub-airflow to blow the smaller particles of the ultra-fine powder in the main airflow to enter the inside of the second storage cavity D through the small-diameter filter holes on the lower partition plate 23, then the smaller particles of the ultra-fine powder remaining in the second distribution cavity C follow the main airflow to enter the inside of the first distribution cavity A through the small-diameter filter holes on the horizontal plate 21 for repeated classification treatment, thereby effectively improving the classification effect of the classifier on the ultra-fine powder.
[0036] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.
Claims
1. A wind classifier for drying ultrafine powder, comprising a classifier body (1), wherein a dividing mechanism (2) is provided inside the classifier body (1), the dividing mechanism (2) dividing the interior of the classifier body (1) into a first dispensing chamber (A), a first storage chamber (B), a second dispensing chamber (C), and a second storage chamber (D), wherein the first dispensing chamber (A) and the second dispensing chamber (C) are used for wind-classifying ultrafine powder, and the first storage chamber (B) and the second storage chamber (D) are used for storing the classified ultrafine powder, characterized in that: The top of the classifier body (1) is provided with a feeding mechanism (3), which is used to crush agglomerated ultrafine powder. The feeding mechanism (3) includes a feeding hopper (31) fixedly installed on the top of the classifier body (1). The feeding hopper (31) is connected to the first distributing chamber (A). The inner wall of the feeding hopper (31) is connected to the first distributing chamber (A) at an arc-shaped grinding surface (32) with grinding protrusions on its surface. A rotatable grinding disc (36) is provided inside the feeding hopper (31). The outer wall of the grinding disc (36) is connected to the grinding surface (32). The distance between them decreases from top to bottom. During rotation, the grinding disc (36) works with the grinding surface (32) to crush the agglomerated ultrafine powder. The outer side of the classifier body (1) is provided with a first blower mechanism (4), a second blower mechanism (5) and a third blower mechanism (6). The first blower mechanism (4), the second blower mechanism (5) and the third blower mechanism (6) blow out airflows with different flow rates. The first blower mechanism (4) and the second blower mechanism (5) are connected to the first distribution chamber (A), and the third blower mechanism (6) is connected to the second distribution chamber (C).
2. The air classifier used for drying ultrafine powder according to claim 1, characterized in that: The separating mechanism (2) includes a horizontal plate (21) fixedly installed inside the grading machine body (1). A Y-shaped upper partition (22) and a V-shaped lower partition (23) are fixedly installed on the upper and lower surfaces of the horizontal plate (21), respectively. A large-diameter filter hole is opened on one side wall of the upper partition (22). The first material distribution chamber (A) and the second material distribution chamber (C) are connected through the large-diameter filter hole of the upper partition (22). A through-hole is opened on the other side wall of the upper partition (22). The first material distribution chamber (A) and the first material storage chamber (B) are connected through the small-diameter filter holes of the upper partition (22). A small-diameter filter hole is provided on one side wall of the lower partition (23). The second material distribution chamber (C) and the second material storage chamber (D) are connected through the small-diameter filter holes. A small-diameter filter hole is provided on one side of the horizontal plate (21). The first material distribution chamber (A) and the second material distribution chamber (C) are connected through the small-diameter filter holes of the horizontal plate (21).
3. The air classifier used for drying ultrafine powder according to claim 1, characterized in that: The feeding mechanism (3) also includes a hydraulic cylinder (33) fixedly installed on one side of the inner wall of the feeding hopper (31) near the top. A fixed frame (34) is fixedly installed on the piston end of the hydraulic cylinder (33). When the piston end of the hydraulic cylinder (33) extends and retracts, it drives the fixed frame (34) to move. A first motor (35) is fixedly installed on the top of the fixed frame (34). The output shaft of the first motor (35) passes through the fixed frame (34) and is coaxially connected to the top of the grinding disc (36). The output shaft of the first motor (35) rotates and drives the grinding disc (36) to rotate.
4. The air classifier used for drying ultrafine powder according to claim 3, characterized in that: Two cleaning scrapers (37) are symmetrically fixed on opposite side walls of the fixed frame (34). A cleaning brush is fixed on the surface of the cleaning scraper (37) near the grinding disc (36). The cleaning brush slides in contact with the surface of the grinding disc (36). The cleaning brush cleans the surface of the grinding disc (36) during the rotation of the grinding disc (36).
5. The air classifier used for drying ultrafine powder according to claim 1, characterized in that: The first blower mechanism (4), the second blower mechanism (5) and the third blower mechanism (6) all include a mounting base (43) fixedly installed on the side wall of the classifier body (1) near the middle position. A rotating rod (44) is rotatably installed inside the mounting base (43). One end of the rotating rod (44) near the classifier body (1) extends into the interior of the classifier body (1) and is fixedly installed with several fan blades (45). During the rotation of the rotating rod (44), it drives the fan blades (45) to rotate and generate airflow.
6. The air classifier used for drying ultrafine powder according to claim 5, characterized in that: The first blower mechanism (4), the second blower mechanism (5) and the third blower mechanism (6) also include a mounting bracket (41) fixedly installed on the top of the classifier body (1). The mounting bracket (41) and the mounting base (43) are fixedly provided with a mounting shell (46) at one end away from the classifier body (1). The upper surface of the mounting bracket (41) is fixedly provided with a second motor (42). The output shaft and the rotating rod (44) of the second motor (42) extend into the interior of the mounting shell (46) away from the classifier body (1) and are coaxially fixedly provided with pulleys (47). A narrow V-belt (48) is sleeved on the outside of the two pulleys (47). The output shaft of the second motor (42) drives one of the pulleys (47) to rotate and drives the other pulley (47) to rotate through the narrow V-belt (48).