Novel powder grading device

Abstract

The utility model provides a novel powder grading device, which belongs to the technical field of powder grading and comprises a support, a screening barrel is mounted on the support, an air outlet box is arranged on the screening barrel, driving mechanisms are arranged on the air outlet box and in the air outlet box, a feeding partition plate is further arranged in the air outlet box, the feeding partition plate extends upwards to be provided with a feeding port, and the feeding port is communicated with the screening barrel. A screening mechanism is further arranged at the lower end of the driving mechanism, a flow guide mechanism is arranged in the screening barrel, and a discharging port is formed in the lower end of the screening barrel. The problems that according to an existing traditional screening technology, particle size separation is achieved through a mechanical screen, when medicinal materials with different particle sizes are screened, screens with different hole diameters need to be replaced usually, and the overall practicability is not high due to frequent replacement are solved.

Description

Technical Field

[0001] This utility model belongs to the field of powder classification technology, and specifically relates to a novel powder classification device. Background Technology

[0002] In the modern production of traditional Chinese medicine, the pulverization of medicinal materials is an important process. Pulverizing medicinal materials before use helps to maximize their medicinal properties. The grading of powder after pulverization is also a key factor affecting the quality and efficacy of the preparation.

[0003] Existing traditional sieving technology separates particles by mechanical screens. When sieving medicinal materials of different particle sizes, it is usually necessary to change the screens with different aperture sizes. Frequent changes make the overall practicality low. Summary of the Invention

[0004] This invention provides a novel powder grading device, which aims to solve the problem that existing traditional sieving technology achieves particle size separation through mechanical screens. When sieving medicinal materials of different particle sizes, it is usually necessary to change screens with different aperture sizes, and frequent changes make the overall practicality low.

[0005] This utility model provides a novel powder grading device, including a support frame, a sieving barrel mounted on the support frame, an air outlet box on the sieving barrel, a drive mechanism on and inside the air outlet box, a feed baffle in the air outlet box, a feed inlet extending upward from the feed baffle, a sieving mechanism at the lower end of the drive mechanism, a flow guiding mechanism inside the sieving barrel, and a discharge port at the lower end of the sieving barrel.

[0006] Furthermore, an air outlet is provided on one side of the air outlet box, the bottom of the air outlet box is a truncated cone shape that is narrow at the bottom and wide at the top, the bottom of the air outlet box is in contact with the peripheral wall of the feed partition, and the bottom of the air outlet box is provided with an upward-facing conical air inlet.

[0007] By adopting the above technical solution, the bottom of the air outlet box is designed as a frustum-shaped cone that is narrow at the bottom and wide at the top, and it is in close contact with the periphery of the feed baffle. The conical air inlet extends upward, guiding the airflow to diffuse evenly from the bottom into the interior of the screening barrel.

[0008] Furthermore, the drive mechanism includes a motor fixed on the side of the air outlet box away from the air outlet, and a rotating shaft is rotatably installed in the middle of the air outlet box. The top of the rotating shaft is linked to the output end of the motor through a chain, and the bottom of the rotating shaft extends to the outside of the feed partition.

[0009] By adopting the above technical solution, the motor drives the rotating shaft to rotate through the middle of the air box and extends to the outside of the feed baffle, ensuring the coaxial stability of the screening mechanism and the drive mechanism, avoiding equipment wear caused by vibration, and the motor is arranged far away from the air outlet to prevent dust from entering the motor and extend the service life of the equipment.

[0010] Furthermore, the screening mechanism includes a baffle fixed to the bottom periphery of the rotating shaft, a connecting plate fixedly installed at the bottom of the rotating shaft, a connecting rod fixed to the upper surface of the connecting plate, a screening wheel fixed to the top of the connecting rod, the screening wheel being hollow in the middle, the screening wheel being sleeved on the outer periphery of the feed baffle and located between the bottom of the feed baffle and the air inlet, and the surface of the screening wheel being provided with several grids at consistent intervals.

[0011] By adopting the above technical solution, the screening wheel is rigidly connected to the rotating shaft through the connecting plate and connecting rod. The grid evenly distributed on its surface forms a structure similar to an impeller. When the rotating shaft rotates at high speed, the baffle can also rotate at high speed, which causes the material falling from the feed baffle to be impacted and dispersed. When rotating, the screening wheel can generate a centrifugal force field. Coarse particles are thrown to the outside of the screening barrel due to their large mass and are discharged from the discharge port after being guided by the guide plate. Fine particles pass through the grid gaps under the drag force of the airflow and enter the air outlet box from the air inlet with the rising airflow.

[0012] Furthermore, the flow guiding mechanism includes an air outlet connected to one side of the screening barrel, and a flow guiding plate is provided on the circumference of the inner wall surface of the screening barrel facing the rotation axis. The flow guiding plate is in the shape of an inwardly concave arc, and the contact point between the top of the inner wall surface of the screening barrel and the air outlet box is in the shape of an upwardly concave arc.

[0013] By adopting the above technical solution, the concave arc-shaped guide plate on the inner wall of the screening barrel and the concave arc surface on the top guide the airflow to rise along the spiral path after entering from the air outlet. The concave arc surface can reduce energy loss. At the same time, the design of the guide plate converging towards the rotating shaft strengthens the centripetal airflow, forcing fine particles to concentrate in the screening wheel area, improving the classification efficiency. The smooth transition between the concave arc surface on the top and the air outlet box further reduces airflow resistance and ensures the continuity of the classification process.

[0014] Furthermore, the bottom of the guide plate is flush with the bottom of the air outlet, and the top of the guide plate is higher than the top of the air outlet.

[0015] By adopting the above technical solution, the bottom of the guide plate is flush with the bottom of the air outlet, ensuring that the airflow is evenly distributed in the horizontal direction when it first enters; the top of the guide plate is higher than the top of the air outlet, forming a spiral lifting zone for the airflow, which avoids the high-speed airflow from the air outlet from directly impacting the screening wheel or causing airflow collisions and generating turbulence. This design guides the airflow to flow in layers: the bottom layer of airflow carries coarse particles to settle, and the upper layer of airflow carries fine particles to rise, thus achieving the separation of coarse and fine powders.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. This utility model, through the setting of the screening mechanism, has a screening wheel rigidly connected to the rotating shaft through a connecting plate and a connecting rod. The grid evenly distributed on its surface forms a structure similar to an impeller. When the rotating shaft rotates at high speed, the baffle can also rotate at high speed, thereby causing the material falling from the feed baffle to be impacted and dispersed. When rotating, the screening wheel can generate a centrifugal force field. Coarse particles, due to their large mass, are thrown to the outside of the screening barrel and discharged from the outlet after being guided by the guide plate. Fine particles, under the drag force of the airflow, pass through the grid gaps and enter the air outlet box from the air inlet with the rising airflow.

[0018] 2. The present invention, through the setting of the air outlet box, the bottom design of the air outlet box can guide the airflow to diffuse evenly from the bottom to the inside of the screening barrel, thereby bringing fine particles from the air inlet into the air outlet box.

[0019] 3. Through the design of the flow guiding mechanism, the concave arc-shaped flow guiding plate on the inner wall of the screening barrel and the concave arc surface on the top guide the airflow to enter from the air inlet and rise along the spiral path. The concave arc surface can reduce energy loss. At the same time, the design of the flow guiding plate converging towards the rotating shaft strengthens the centripetal airflow, forcing fine particles to concentrate in the screening wheel area, improving the classification efficiency. The smooth transition between the concave arc surface on the top and the air outlet box further reduces airflow resistance and ensures the continuity of the classification process.

[0020] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a front view structural diagram of an embodiment of the present utility model;

[0023] Figure 2 This is a schematic cross-sectional view of the screening barrel according to an embodiment of the present utility model;

[0024] Figure 3 This is an enlarged structural diagram of point a in an embodiment of the present invention;

[0025] Reference numerals in the attached drawings: 1. Support frame; 2. Screening barrel; 3. Air outlet box; 31. Air outlet; 32. Air inlet; 4. Drive mechanism; 41. Motor; 42. Rotating shaft; 5. Feed baffle; 6. Feed inlet; 7. Screening mechanism; 71. Baffle; 72. Connecting plate; 73. Connecting rod; 74. Screening wheel; 8. Flow guiding mechanism; 81. Air outlet; 82. Flow guide plate; 9. Discharge port. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0027] Reference Figure 1-3 This utility model embodiment proposes a novel powder grading device, including a support 1, a screening barrel 2 mounted on the support 1, a discharge port 9 at the lower end of the screening barrel 2, an air outlet box 3 on the screening barrel 2, a feed baffle 5 in the air outlet box 3, a feed inlet 6 extending upward from the feed baffle 5, an air outlet 31 on one side of the air outlet box 3, the bottom of the air outlet box 3 being a truncated cone shape narrower at the bottom and wider at the top, the bottom of the air outlet box 3 contacting the peripheral wall of the feed baffle 5, and an upward-facing conical air inlet 32 ​​at the bottom of the air outlet box 3. The bottom of the air outlet box 3 is designed as a truncated cone shape narrower at the bottom and wider at the top, and is in close contact with the peripheral wall of the feed baffle 5. The conical air inlet 32 ​​extends upward, guiding the airflow to diffuse evenly from the bottom into the interior of the screening barrel 2.

[0028] Reference Figure 1-3 A drive mechanism 4 is provided on and inside the air outlet box 3. The drive mechanism 4 includes a motor 41 fixed on the side of the air outlet box 3 away from the air outlet 31. A rotating shaft 42 is also rotatably installed in the middle of the air outlet box 3. The rotating shaft 42 is also located in the middle of the feed baffle 5. The top of the rotating shaft 42 is linked to the output end of the motor 41 through a chain. The bottom end of the rotating shaft 42 is located below the bottom end of the feed baffle 5. The motor 41 drives the rotating shaft 42 to rotate through the chain. The rotating shaft 42 passes through the middle of the air outlet box 3 and extends to the outside of the feed baffle 5 to ensure the coaxial stability of the screening mechanism 7 and the drive mechanism 4 and avoid equipment wear caused by vibration. The motor 41 is arranged away from the air outlet 31 to prevent dust from entering the motor 41 and extend the service life of the equipment.

[0029] Reference Figure 1-3The screening barrel 2 is equipped with a flow guiding mechanism 8, which includes an air outlet 81 connected to one side of the screening barrel 2. An air pump continuously blows air into the screening barrel 2 through the air outlet 81. A flow guide plate 82 is provided on the circumference of the inner wall of the screening barrel 2, facing the rotating shaft 42. The flow guide plate 82 is concave arc-shaped, and the top of the inner wall of the screening barrel 2, where it contacts the air outlet box 3, is concave arc-shaped. The concave arc-shaped flow guide plate 82 and the concave arc-shaped top surface guide the airflow from the air outlet 81 upward along a spiral path. The concave arc-shaped surface reduces energy loss. Simultaneously, the design of the flow guide plate 82 converging towards the rotating shaft 42 strengthens the centripetal airflow, forcing fine particles to concentrate in the screening wheel 74 area, improving efficiency. High classification efficiency; the smooth transition between the concave arc surface at the top and the air outlet box 3 further reduces airflow resistance and ensures the continuity of the classification process. The bottom of the guide plate 82 is level with the bottom of the air outlet 81, the top of the guide plate 82 is higher than the top of the air outlet 81, and the bottom of the guide plate 82 is level with the bottom of the air outlet 81, ensuring that the airflow is evenly distributed in the horizontal direction when it first enters. The top of the guide plate 82 is higher than the top of the air outlet 81, forming a spiral lifting zone for the airflow, avoiding the direct impact of the high-speed airflow from the air outlet 81 on the screening wheel 74 or the collision of airflows to generate turbulence. This design guides the airflow to flow in layers: the bottom layer of airflow carries coarse particles to settle, and the upper layer of airflow carries fine particles to rise, realizing the separation of coarse and fine powders.

[0030] Reference Figure 1-3 The lower end of the drive mechanism 4 is also provided with a screening mechanism 7. The screening mechanism 7 includes a baffle 71 fixed to the bottom periphery of the rotating shaft 42. A connecting plate 72 is also fixedly installed at the bottom of the rotating shaft 42. A connecting rod 73 is fixed to the upper surface of the connecting plate 72. A screening wheel 74 is fixed to the top of the connecting rod 73. The middle part of the screening wheel 74 is hollow. The screening wheel 74 is sleeved on the outer periphery of the feed baffle 5 and is located between the bottom of the feed baffle 5 and the air inlet 32. The surface of the screening wheel 74 is provided with several grids with uniform spacing. The screening wheel 74 is rigidly connected to the rotating shaft 42 through the connecting plate 72 and the connecting rod 73. The grids evenly distributed on its surface form Similar to an impeller structure, when the shaft 42 rotates at high speed, the baffle 71 can also rotate at high speed, which causes the material falling from the feed baffle 5 to be impacted and dispersed. At the same time, the screening wheel 74 can also rotate synchronously with the shaft 42. When the screening wheel 74 rotates, it can generate a centrifugal force field. Coarse particles are thrown to the outside of the screening barrel 2 due to their large mass and are discharged from the discharge port 9. Fine particles pass through the grid gaps under the drag force of the airflow, enter the air box 3 from the air inlet 32 ​​with the rising airflow, and are discharged from the air outlet 31. When it is necessary to screen particles of different diameters, it can be achieved by adjusting the rotation speed of the shaft 42 and the air speed of the air outlet 81.

[0031] The specific implementation method is as follows: When in use, the material is poured into the feed baffle 5 from the feed inlet 6. Driven by the rotating shaft 42, the baffle 71 rotates, thereby dispersing the material. At this time, under the premise of continuous air blowing from the air outlet 81, the airflow inside the screening barrel 2 can blow the fine particles upward, and the coarse particles can fall directly from the discharge port 9. Under the action of the guide mechanism 8, the air entering the screening barrel 2 can form a spiral upward airflow. At the same time, the screening wheel 74 can generate a centrifugal force during rotation. Thus, the fine particles can enter the air outlet box 3 through the grid gap of the screening wheel 74 through the air inlet 32 ​​under the action of the airflow drag force, and then be discharged from the air outlet 31, achieving the purpose of separating coarse and fine particles. At the same time, the particle size of different diameters can be separated by adjusting the air force of the air outlet 81 and the rotation speed of the shaft 42.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A novel powder classification device, comprising a support (1), characterized in that, The support (1) is equipped with a screening barrel (2), the screening barrel (2) is provided with an air outlet box (3), the air outlet box (3) and its interior are provided with a drive mechanism (4), the air outlet box (3) is also provided with a feed baffle (5), the feed baffle (5) extends upward to provide a feed inlet (6), the lower end of the drive mechanism (4) is also provided with a screening mechanism (7), the interior of the screening barrel (2) is provided with a flow guiding mechanism (8), and the lower end of the screening barrel (2) is provided with a discharge port (9).

2. The novel powder classification device according to claim 1, characterized in that: The air outlet box (3) has an air outlet (31) on one side. The bottom of the air outlet box (3) is a truncated cone shape that is narrow at the bottom and wide at the top. The bottom of the air outlet box (3) is in contact with the peripheral wall of the feed partition (5). The bottom of the air outlet box (3) has an upward-facing conical air inlet (32).

3. A novel powder classification device according to claim 2, characterized in that: The drive mechanism (4) includes a motor (41) fixed on the side of the air outlet box (3) away from the air outlet (31). A rotating shaft (42) is also rotatably installed in the middle of the air outlet box (3). The top of the rotating shaft (42) is linked with the output end of the motor (41) through a chain. The bottom of the rotating shaft (42) extends to the outside of the feed partition (5).

4. A novel powder classification device according to claim 3, characterized in that: The screening mechanism (7) includes a baffle (71) fixed to the bottom periphery of the rotating shaft (42). A connecting plate (72) is also fixedly installed at the bottom of the rotating shaft (42). A connecting rod (73) is fixed on the upper surface of the connecting plate (72). A screening wheel (74) is fixed on the top of the connecting rod (73). The middle part of the screening wheel (74) is hollow. The screening wheel (74) is sleeved on the outer periphery of the feed partition (5) and located between the bottom of the feed partition (5) and the air inlet (32). The surface of the screening wheel (74) is provided with several grids with consistent spacing.

5. A novel powder classification device according to claim 4, characterized in that: The flow guiding mechanism (8) includes an air outlet (81) connected to one side of the screening barrel (2). The inner wall of the screening barrel (2) is provided with a flow guide plate (82) facing the rotating shaft (42). The flow guide plate (82) is in the shape of an inwardly concave arc. The contact point between the top of the inner wall of the screening barrel (2) and the air outlet box (3) is in the shape of an upwardly concave arc.

6. A novel powder classification device according to claim 5, characterized in that: The bottom of the guide plate (82) is flush with the bottom of the air outlet (81), and the top of the guide plate (82) is higher than the top of the air outlet (81).

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