A method and apparatus for multi-stage screening of drugs

Abstract

The application relates to the technical field of medicine screening equipment, and discloses a medicine multistage screening method and equipment, which solves the problems that the existing screening equipment is inconvenient for continuous screening and is prone to blockage, and comprises a shell, one end of the top of the shell is provided with a spiral feeder, the top end of the spiral feeder is provided with a feeding hopper, the top of one end of the inside of the shell is provided with a plurality of air blowers one, the bottom of one end close to the air blowers one of the inside of the shell is provided with a plurality of air blowers two, the inside of the shell is provided with three screening mechanisms and three flow guide mechanisms, the three flow guide mechanisms divide the inside of the shell into a first air blowing flow channel and a second air blowing flow channel, the bottom end of the shell is provided with three material collecting and discharging integrated mechanisms, one end of the shell away from the spiral feeder is provided with an air exhaust flow guide cover, and the bottom end of the air exhaust flow guide cover is provided with a breathable material collecting bag; through the screening equipment, continuous screening can be realized, and the anti-blocking effect is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of drug screening equipment, and particularly relates to a multi-stage drug screening method and device. BACKGROUND

[0002] In the process of drug research and preparation, solid crystalline drug intermediates need to be ground for the subsequent preparation of tablet or capsule drugs according to the preparation process. In this process, screening equipment is needed to screen and classify the powdered drugs. The existing screening device is usually a horizontal multi-layer structure and is usually an open structure. In the screening process, it is inconvenient for continuous screening, the screen is prone to blockage and is difficult to clean, and the drug powder is prone to flying, so the use effect is not good. Therefore, the application provides a multi-stage drug screening method and device. SUMMARY

[0003] In view of the above problems, the application provides a multi-stage drug screening method and device to overcome the defects of the prior art.

[0004] To achieve the above purpose, the application provides the following technical scheme: a multi-stage drug screening method and device, comprising a shell, one end of the top of the shell is fixedly provided with a spiral feeder, the top end of the spiral feeder is fixedly provided with a feeding hopper, the top of one end of the inside of the shell is fixedly provided with a plurality of air blowers one, the bottom of one end of the inside of the shell close to the air blower one is fixedly provided with a plurality of air blowers two, the inside of the shell is provided with three screening mechanisms and three flow guide mechanisms corresponding to the screening mechanisms one, the three flow guide mechanisms divide the inside of the shell into a first air flow channel and a second air flow channel, the bottom end of the shell is fixedly provided with three material collecting and discharging integrated mechanisms located at the bottom of the flow guide mechanism, the end of the shell away from the spiral feeder is fixedly provided with an air exhaust flow guide cover, the bottom end of the air exhaust flow guide cover is provided with a breathable material collecting bag, and the front of the shell is fixedly provided with a control panel close to one end of the spiral feeder;

[0005] The flow guide mechanism is composed of a supporting column, an arc-shaped elastic sleeve, a discharging bottom plate, a material guiding top plate, a first arc-shaped elastic plate, a second arc-shaped elastic plate and a rotor vibration motor, the supporting column is fixedly connected to the bottom end of the inside of the shell, the arc-shaped elastic sleeve is fixedly connected to the top end of the supporting column through bolts, the discharging bottom plate is fixedly connected to the top end of the arc-shaped elastic sleeve, a plurality of discharging through holes are formed in the top end of the discharging bottom plate away from the arc-shaped elastic sleeve, the first arc-shaped elastic plate and the second arc-shaped elastic plate are both fixedly connected to the top end of the discharging bottom plate, the rotor vibration motor is fixedly connected to one side of the first arc-shaped elastic plate close to the second arc-shaped elastic plate, and the discharging bottom plate and the material guiding top plate form a feeding slot at the end away from the second arc-shaped elastic plate;

[0006] The screening mechanism consists of a support frame, a first rubber sealing ring, a second rubber sealing ring, several springs, several support arms, a vibration component, a first screen, and a second screen. The support frame is connected to the inside of the housing through the first and second rubber sealing rings. The springs are fixedly connected between the support frame and the housing. The vibration component is connected to the middle position inside the support frame through the support arms. The first screen and the second screen are respectively connected to the top and bottom of the support frame.

[0007] Preferably, an inclined support seat is fixedly provided at one end of the top of the guide plate near the second arc-shaped elastic plate, an L-shaped support plate is provided at the other end of the inclined support seat away from the guide plate, and a hollow rubber strip is fixedly provided at the other end of the L-shaped support plate away from the inclined support seat.

[0008] Preferably, a second inclined support is fixedly provided at one end of the top of the feeding base plate near the feeding trough, and a rubber guide plate is fixedly provided at the top of the second inclined support.

[0009] Preferably, a perforated dispersion plate is fixedly installed at one end of the bottom of the feeding base plate near the inclined support seat 2, and the perforated dispersion plate is located directly below the feeding through hole.

[0010] Preferably, the first rubber sealing ring is connected to the inner wall of the housing through a metal positioning pressure ring one, and the second rubber sealing ring is connected to the inner wall of the housing through a metal positioning pressure ring two.

[0011] Preferably, the vibration assembly consists of a support box, two short shafts, a linear vibration motor, an ear plate, and an electric telescopic rod. The support box is fixedly connected to the support arm, the linear vibration motor is rotatably connected to the inside of the support box through the two short shafts, the ear plate is fixedly connected to one side of the linear vibration motor, and the electric telescopic rod is hinged between the support box and the ear plate.

[0012] Preferably, the end of the support box near the first and second blowers has a V-shaped inclined structure.

[0013] Preferably, the integrated material collection and discharge mechanism consists of a material collection box and a screw discharge mechanism. The material collection box is fixedly connected to the bottom end of the shell, and the screw discharge mechanism is connected through the bottom end of the material collection box.

[0014] Preferably, the inside of the collection box is fixedly provided with a horizontal guide plate, an inclined guide plate one, and an inclined guide plate two from top to bottom, with the inclined guide plate one and the inclined guide plate two having opposite inclination angles.

[0015] Preferably, the screening method of the drug multi-stage screening device includes the following steps:

[0016] Step 1: Powdered medicine is fed into the hopper and continuously and evenly fed into the shell by a screw feeder. At the same time, blower one and blower two are started, forming a first airflow channel and a second airflow channel inside the shell. The powdered medicine enters the upper part of the screening mechanism through the first airflow channel to achieve screening. Fine particles penetrate the screening mechanism, while coarse particles are intercepted and fall down, then enter the second airflow channel for secondary screening. This prevents coarse particles from falling with fine particles and affecting the screening effect. Three screening mechanisms and three flow guiding mechanisms achieve three screening operations, thereby classifying the powdered medicine. The integrated collection and discharge mechanism can collect medicines of different grades, and the breathable collection bag can collect medicines with the smallest particle size.

[0017] Step 2: During the lateral flow of the drug under the action of wind, it first flows horizontally inside the first air supply channel. The top guide plate guides the drug horizontally to prevent it from falling due to gravity. The drug intercepted by the screening mechanism enters the inside of the feed trough and then falls through the discharge hole to the second air supply channel for secondary screening. During this process, the rotor vibration motor drives the first arc-shaped elastic plate to vibrate, thereby driving the entire guiding mechanism to vibrate, which helps the drug to be discharged quickly and avoids drug blockage.

[0018] Step 3, the drug screening process: First, the drug comes into contact with the first screen. Fine-sized drugs pass through the first screen, while coarse-sized drugs are intercepted and fall down. They are then subjected to secondary screening by the wind speed inside the second air supply channel, which improves the screening accuracy. The first and second rubber sealing rings can improve the sealing of the connection between the support frame and the shell, while also achieving a flexible connection. The vibration component can drive the first and second screens to vibrate as a whole, preventing the first and second screens from becoming blocked. The spring provides an elastic buffering effect.

[0019] Step 4: After three screenings, four types of powder will be formed. The first three types of powder are collected and discharged through an integrated collection and discharge mechanism, and the smallest particle size is collected through a breathable collection bag.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] (1) In operation, by setting up blower one, blower two, and a screening mechanism consisting of a support frame, a first rubber sealing ring, a second rubber sealing ring, several springs, several support arms, a vibration component, a first screen and a second screen, it is possible to perform multi-stage screening of the powder, to perform graded processing of powdered drugs, and to achieve continuous feeding and continuous screening by utilizing airflow, while improving screening efficiency.

[0022] (2) By setting up a flow guiding mechanism consisting of a support column, an arc-shaped elastic jacket, a feeding bottom plate, a guiding top plate, a first arc-shaped elastic plate, a second arc-shaped elastic plate and a rotor vibration motor, the powder can be guided and a first air supply channel and a second air supply channel can be formed. The powder can be screened twice in the same screening mechanism, which improves the sufficiency and accuracy of screening.

[0023] (3) By setting up a vibration assembly consisting of a support box, two short shafts, a linear vibration motor, an ear plate and an electric telescopic rod, the vibration direction can be adjusted, thereby enabling the screening mechanism to vibrate vertically and horizontally, effectively preventing the screening mechanism from clogging.

[0024] (4) By setting up an integrated material collection and discharge mechanism consisting of a material collection box and a spiral discharge mechanism, and by setting up a horizontal guide plate, an inclined guide plate one and an inclined guide plate two, the screened medicine powder can be discharged while avoiding interference from airflow. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0026] In the attached diagram:

[0027] Figure 1 This is a schematic diagram of the structure of the multi-stage drug screening device of the present invention;

[0028] Figure 2 This is a schematic diagram of the internal structure of the multi-stage drug screening device of the present invention;

[0029] Figure 3 This is a schematic diagram of the flow guiding mechanism and screening mechanism of the present invention;

[0030] Figure 4 This is a schematic diagram of the flow guiding mechanism of the present invention;

[0031] Figure 5 For the present invention Figure 4 A magnified view of a section at point A in the middle;

[0032] Figure 6 This is a schematic diagram of the screening mechanism of the present invention;

[0033] Figure 7 This is a schematic diagram of the vibration component structure of the present invention;

[0034] Figure 8 This is a schematic diagram of the integrated material collection and discharge mechanism of the present invention;

[0035] In the diagram: 1. Shell; 2. Screw feeder; 3. Feed hopper; 4. Blower 1; 5. Blower 2; 6. Screening mechanism; 7. Guide mechanism; 8. First air delivery channel; 9. Second air delivery channel; 10. Integrated material collection and discharge mechanism; 11. Exhaust guide hood; 12. Breathable material collection bag; 13. Control panel; 14. Support column; 15. Arc-shaped elastic sleeve; 16. Discharge bottom plate; 17. Guide top plate; 18. First arc-shaped elastic plate; 19. Second arc-shaped elastic plate; 20. Rotor vibration motor; 21. Discharge through hole; 22. Feed trough; 23. Support frame; 24. First rubber sealing ring; 5. Second rubber sealing ring; 26. Spring; 27. Support arm; 28. Vibration assembly; 29. ​​First screen; 30. Second screen; 31. Inclined support seat one; 32. L-shaped support plate; 33. Hollow rubber strip; 34. Inclined support seat two; 35. Rubber guide plate; 36. Mesh dispersion plate; 37. Metal positioning pressure ring one; 38. Metal positioning pressure ring two; 39. Support box; 40. Short shaft; 41. Linear vibration motor; 42. Ear plate; 43. Electric telescopic rod; 44. Collection box; 45. Screw discharge machine; 46. Horizontal guide plate; 47. Inclined guide plate one; 48. Inclined guide plate two. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0037] Implementation examples, by Figures 1 to 8 The present invention provides a method and apparatus for multi-stage drug screening, comprising a housing 1, a screw feeder 2 fixedly mounted at one end of the top of the housing 1, a feeding hopper 3 fixedly mounted at the top of the screw feeder 2, a plurality of blowers 4 fixedly mounted at the top of one end of the housing 1, a plurality of blowers 5 fixedly mounted at the bottom of the housing 1 near the blowers 4, three screening mechanisms 6 and three flow guiding mechanisms 7 corresponding to the screening mechanisms 6 are provided inside the housing 1, the three flow guiding mechanisms 7 divide the interior of the housing 1 into a first air flow channel 8 and a second air flow channel 9, three integrated material collection and discharge mechanisms 10 located at the bottom of the flow guiding mechanisms 7 are fixedly mounted at the bottom of the housing 1, an exhaust hood 11 is fixedly mounted at the end of the housing 1 away from the screw feeder 2, a breathable material collection bag 12 is provided at the bottom of the exhaust hood 11, and a control panel 13 is fixedly mounted on the front of the housing 1 near the screw feeder 2.

[0038] Powdered drugs are fed into the hopper 3 and continuously and evenly fed into the shell 1 by the screw feeder 2. At the same time, blowers 4 and 5 are started, forming a first airflow channel 8 and a second airflow channel 9 inside the shell 1. The powdered drugs enter the upper part of the screening mechanism 6 through the first airflow channel 8 to achieve screening. Fine-sized drugs penetrate the screening mechanism 6, while coarse-sized drugs are intercepted and fall down, and then enter the second airflow channel 9 for secondary screening. This avoids coarse-sized drugs falling with fine-sized drugs, which would affect the screening effect. Three screening operations are achieved through three screening mechanisms 6 and three flow guiding mechanisms 7, thereby achieving the grading of powdered drugs. The integrated collection and discharge mechanism 10 can collect drugs of different grades, and the breathable collection bag 12 can collect drugs with the smallest particle size.

[0039] The flow guiding mechanism 7 consists of a support column 14, an arc-shaped elastic sleeve 15, a discharge bottom plate 16, a guide top plate 17, a first arc-shaped elastic plate 18, a second arc-shaped elastic plate 19, and a rotor vibration motor 20. The support column 14 is fixedly connected to the bottom end inside the housing 1. The arc-shaped elastic sleeve 15 is fixedly connected to the top end of the support column 14 by bolts. The discharge bottom plate 16 is fixedly connected to the top end of the arc-shaped elastic sleeve 15. Several discharge through holes 21 are opened at the top end of the discharge bottom plate 16 away from the arc-shaped elastic sleeve 15. The first arc-shaped elastic plate 18 and the second arc-shaped elastic plate 19 are both fixedly connected to the top end of the discharge bottom plate 16. The rotor vibration motor 20 is fixedly connected to the side of the first arc-shaped elastic plate 18 near the second arc-shaped elastic plate 19. The discharge bottom plate 16 and the guide top plate 17 form a feed inlet 22 at the ends away from the second arc-shaped elastic plate 19.

[0040] During the lateral flow of the drug under the action of wind, it first flows horizontally inside the first air supply channel 8. The top guide plate 17 guides the drug horizontally to prevent it from falling due to gravity. The drug intercepted by the screening mechanism 6 enters the inside of the feed trough 22 and then falls through the discharge hole 21 to the second air supply channel 9 for secondary screening. During this process, the rotor vibration motor 20 drives the first arc-shaped elastic plate 18 to vibrate, thereby driving the entire flow guiding mechanism 7 to vibrate, which helps the drug to be discharged quickly and avoids drug blockage.

[0041] The screening mechanism 6 consists of a support frame 23, a first rubber sealing ring 24, a second rubber sealing ring 25, several springs 26, several support arms 27, a vibration component 28, a first screen 29, and a second screen 30. The support frame 23 is connected to the inside of the housing 1 through the first rubber sealing ring 24 and the second rubber sealing ring 25. The springs 26 are fixedly connected between the support frame 23 and the housing 1. The vibration component 28 is connected to the middle position inside the support frame 23 through the support arms 27. The first screen 29 and the second screen 30 are respectively connected to the top and bottom ends inside the support frame 23.

[0042] In the drug screening process, the drug first comes into contact with the first screen 29. Fine-sized drugs pass through the first screen 29, while coarse-sized drugs are intercepted and fall down. They are then subjected to secondary screening by the wind speed inside the second air supply channel 9, which improves the screening accuracy. The first rubber sealing ring 24 and the second rubber sealing ring 25 can improve the sealing of the connection between the support frame 23 and the shell 1, while also achieving a flexible connection. The vibration component 28 can drive the first screen 29 and the second screen 30 to vibrate as a whole, preventing the first screen 29 and the second screen 30 from becoming blocked. The spring 26 provides an elastic buffering effect.

[0043] An inclined support seat 31 is fixedly installed at one end of the top of the guide plate 17 near the second arc-shaped elastic plate 19. An L-shaped support plate 32 is installed at the end of the inclined support seat 31 away from the guide plate 17. A hollow rubber strip 33 is fixedly installed at the end of the L-shaped support plate 32 away from the inclined support seat 31. This can improve the flexible fit with the adjacent screening mechanism 6, improve the sealing and buffering effect, and make the air inside the first air supply channel 8 and the second air supply channel 9 flow independently to avoid mutual interference.

[0044] An inclined support seat 34 is fixedly installed at one end of the top of the bottom plate 16 near the feed trough 22. A rubber guide plate 35 is fixedly installed at the top of the inclined support seat 34, which can guide the coarse-sized powder inside the first air channel 8 so that the powder can fully enter the feed through hole 21.

[0045] A mesh dispersion plate 36 is fixedly installed at one end of the bottom of the feeding base plate 16 near the inclined support seat 34. The mesh dispersion plate 36 is located directly below the feeding through hole 21. When the powder falls into the second air supply channel 9, it disperses the powder and avoids the powder from being too concentrated and affecting the screening effect.

[0046] The first rubber sealing ring 24 is connected to the inner wall of the housing 1 through the metal positioning pressure ring 37, and the second rubber sealing ring 25 is connected to the inner wall of the housing 1 through the metal positioning pressure ring 38, which can limit the installation of the first rubber sealing ring 24 and the second rubber sealing ring 25.

[0047] The vibration assembly 28 consists of a support box 39, two short shafts 40, a linear vibration motor 41, an ear plate 42, and an electric telescopic rod 43. The support box 39 is fixedly connected to the support arm 27. The linear vibration motor 41 is rotatably connected to the inside of the support box 39 through the two short shafts 40. The ear plate 42 is fixedly connected to one side of the linear vibration motor 41. The electric telescopic rod 43 is hinged between the support box 39 and the ear plate 42.

[0048] The vibration assembly 28 can achieve vertical and horizontal vibration adjustment. During adjustment, the linear vibration motor 41 is driven to rotate around the short axis 40 by the electric telescopic rod 43. Through vertical and horizontal vibration adjustment, the first screen 29 and the second screen 30 can be effectively prevented from clogging.

[0049] The end of the support box 39 near the blower 4 and blower 5 has a V-shaped inclined structure, which can guide the air intake and avoid excessive air resistance.

[0050] The integrated material collection and discharge mechanism 10 consists of a material collection box 44 and a screw discharger 45. The material collection box 44 is fixedly connected to the bottom end of the housing 1, and the screw discharger 45 is connected through the bottom end of the material collection box 44. The material collection box 44 collects the screened powder, and the screw discharger 45 discharges the powder.

[0051] Inside the collection box 44, from top to bottom, there are a horizontal guide plate 46, an inclined guide plate 47 and an inclined guide plate 48. The inclined guide plate 47 and the inclined guide plate 48 have opposite inclination angles, which can form an S-shaped discharge channel to avoid the powder inside the collection box 44 being affected by the second air supply channel 9.

[0052] The screening method for multi-stage drug screening equipment includes the following steps:

[0053] Step 1: Powdered medicine is fed into the hopper 3. The screw feeder 2 continuously and evenly feeds the medicine into the shell 1. At the same time, the blower 4 and blower 5 are started, so that the shell 1 forms a first air flow channel 8 and a second air flow channel 9. The powdered medicine enters the upper part of the screening mechanism 6 through the first air flow channel 8 to achieve the screening work. Fine particles penetrate the screening mechanism 6, while coarse particles are intercepted and fall down, and then enter the second air flow channel 9 to achieve secondary screening. This avoids coarse particles from falling with fine particles and affecting the screening effect. The three screening mechanisms 6 and three guiding mechanisms 7 achieve three screening operations, thereby achieving the grading of powdered medicine. The integrated collection and discharge mechanism 10 can collect medicines of different grades, and the breathable collection bag 12 can collect medicines with the smallest particle size.

[0054] Step 2: During the lateral flow of the drug under the action of wind, it first flows horizontally inside the first air supply channel 8. The top guide plate 17 guides the drug horizontally to prevent it from falling due to gravity. The drug intercepted by the screening mechanism 6 enters the inside of the feed trough 22 and then falls through the discharge through hole 21 to the second air supply channel 9 for secondary screening. During this process, the rotor vibration motor 20 drives the first arc-shaped elastic plate 18 to vibrate, thereby driving the entire flow guiding mechanism 7 to vibrate, which helps the drug to be discharged quickly and avoids drug blockage.

[0055] Step 3, the drug screening process: First, the drug comes into contact with the first screen 29. Fine-sized drugs pass through the first screen 29, while coarse-sized drugs are intercepted and fall down. They are then subjected to secondary screening by the wind speed inside the second air supply channel 9, which improves the screening accuracy. The first rubber sealing ring 24 and the second rubber sealing ring 25 can improve the sealing of the connection between the support frame 23 and the shell 1, while also achieving a flexible connection. The vibration component 28 can drive the first screen 29 and the second screen 30 to vibrate as a whole, preventing the first screen 29 and the second screen 30 from becoming blocked. The spring 26 provides an elastic buffering effect.

[0056] Step 4: After three screenings, four types of powder will be formed. The first three types of powder are collected and discharged through the integrated collection and discharge mechanism 10, and the smallest particle size is collected through the breathable collection bag 12.

[0057] In operation, by setting up blower one and blower two, and a screening mechanism consisting of a support frame, a first rubber sealing ring, a second rubber sealing ring, several springs, several support arms, a vibration assembly, a first screen, and a second screen, multi-stage screening of the medicinal powder can be achieved, enabling the grading of powdered drugs. Utilizing airflow, continuous feeding and screening are achieved, while simultaneously improving screening efficiency. Furthermore, by setting up a flow guiding mechanism consisting of a support column, an arc-shaped elastic jacket, a discharge bottom plate, a guide top plate, a first arc-shaped elastic plate, a second arc-shaped elastic plate, and a rotor vibration motor, the medicinal powder can be guided and... The system forms a first airflow channel and a second airflow channel, enabling two screenings of the medicinal powder within the same screening mechanism, thus improving the thoroughness and accuracy of the screening. A vibration assembly consisting of a support box, two short shafts, a linear vibration motor, ear plates, and an electric telescopic rod allows for adjustment of the vibration direction, enabling both vertical and horizontal vibrations of the screening mechanism and effectively preventing blockages. An integrated material collection and discharge mechanism, comprising a collection box and a spiral discharge mechanism, along with horizontal guide plates, inclined guide plates one and two, allows for the discharge of the screened medicinal powder while preventing airflow interference.

Claims

1. A pharmaceutical multi-stage screening apparatus comprising a housing (1), characterized in that: The top of the shell (1) is fixedly provided with a spiral feeder (2), the top end of the spiral feeder (2) is fixedly provided with a feeding hopper (3), the top of the inside of the shell (1) is fixedly provided with a plurality of air blowers (4), the bottom of the inside of the shell (1) is fixedly provided with a plurality of air blowers (5) close to one end of the air blower (4), the inside of the shell (1) is provided with three screening mechanisms (6) and three corresponding flow guide mechanisms (7), the three flow guide mechanisms (7) divide the inside of the shell (1) into a first air flow channel (8) and a second air flow channel (9), the bottom end of the shell (1) is fixedly provided with three material collecting and discharging integrated mechanisms (10) at the bottom of the flow guide mechanism (7), the end of the shell (1) away from the spiral feeder (2) is fixedly provided with an air exhaust flow guide cover (11), the bottom end of the air exhaust flow guide cover (11) is provided with a breathable material collecting bag (12), the front of the shell (1) is fixedly provided with a control panel (13) close to one end of the spiral feeder (2); The flow guide mechanism (7) is composed of a support column (14), an arc-shaped elastic jacket (15), a discharging bottom plate (16), a material guiding top plate (17), a first arc-shaped elastic plate (18), a second arc-shaped elastic plate (19) and a rotor vibration motor (20), the support column (14) is fixedly connected to the bottom end inside the shell (1), the arc-shaped elastic jacket (15) is fixedly connected to the top end of the support column (14) through bolts, the discharging bottom plate (16) is fixedly connected to the top end of the arc-shaped elastic jacket (15), a plurality of discharging through holes (21) are formed in the top end of the discharging bottom plate (16) away from the arc-shaped elastic jacket (15), the first arc-shaped elastic plate (18) and the second arc-shaped elastic plate (19) are both fixedly connected to the top end of the discharging bottom plate (16), the rotor vibration motor (20) is fixedly connected to the side of the first arc-shaped elastic plate (18) close to the second arc-shaped elastic plate (19), the discharging bottom plate (16) and the material guiding top plate (17) form a feeding slot (22) away from the second arc-shaped elastic plate (19); The screening mechanism (6) is composed of a support frame (23), a first rubber sealing ring (24), a second rubber sealing ring (25), a plurality of springs (26), a plurality of support arms (27), a vibration assembly (28), a first screen (29) and a second screen (30), the support frame (23) is connected to the inside of the shell (1) through the first rubber sealing ring (24) and the second rubber sealing ring (25), the springs (26) are fixedly connected between the support frame (23) and the shell (1), the vibration assembly (28) is connected to the middle position inside the support frame (23) through the support arms (27), the first screen (29) and the second screen (30) are respectively connected to the top end and the bottom end inside the support frame (23).

2. The pharmaceutical multi-stage screening apparatus of claim 1, wherein: The top of the material guiding top plate (17) is fixedly provided with a bevel support seat one (31) near one end of the second arc-shaped elastic plate (19), and the other end of the bevel support seat one (31) is provided with an L-shaped support plate (32), and the other end of the L-shaped support plate (32) is fixedly provided with a hollow rubber strip (33).

3. The pharmaceutical multi-stage screening apparatus of claim 1, wherein: The top of the material guiding top plate (17) is fixedly provided with a bevel support seat one (31) near one end of the second arc-shaped elastic plate (19), and the other end of the bevel support seat one (31) is provided with an L-shaped support plate (32), and the other end of the L-shaped support plate (32) is fixedly provided with a hollow rubber strip (33).

4. The pharmaceutical multi-stage screening apparatus of claim 3, wherein: The bottom of the material guiding bottom plate (16) is fixedly provided with a mesh dispersion plate (36) near one end of the bevel support seat two (34), and the mesh dispersion plate (36) is located directly below the material guiding hole (21).

5. The pharmaceutical multi-stage screening apparatus of claim 1, wherein: The first rubber sealing ring (24) is connected with the inner side wall of the shell (1) through a metal positioning pressure ring one (37), and the second rubber sealing ring (25) is connected with the inner side wall of the shell (1) through a metal positioning pressure ring two (38).

6. The pharmaceutical multi-stage screening apparatus of claim 1, wherein: The vibration assembly (28) is composed of a support box (39), two short shafts (40), a linear vibration motor (41), an ear plate (42) and an electric telescopic rod (43), the support box (39) is fixedly connected with the support arm (27), the linear vibration motor (41) is rotatably connected to the inside of the support box (39) through the two short shafts (40), the ear plate (42) is fixedly connected to one side of the linear vibration motor (41), and the electric telescopic rod (43) is hinged between the support box (39) and the ear plate (42).

7. A pharmaceutical multi-stage screening apparatus according to claim 6, wherein: The support box (39) is V-shaped at one end near the air blower one (4) and the air blower two (5).

8. The pharmaceutical multi-stage screening apparatus of claim 1, wherein: The material collecting and discharging integrated mechanism (10) is composed of a material collecting box (44) and a spiral discharging machine (45), the material collecting box (44) is fixedly connected to the bottom end of the shell (1), and the spiral discharging machine (45) penetrates through the bottom end inside the material collecting box (44).

9. A pharmaceutical multi-stage screening apparatus according to claim 8, wherein: The inside of the material collecting box (44) is sequentially fixedly provided with a transverse flow guide plate (46), a first inclined flow guide plate (47) and a second inclined flow guide plate (48) from top to bottom, and the inclination angles of the first inclined flow guide plate (47) and the second inclined flow guide plate (48) are opposite.

10. A method of screening with a pharmaceutical multi-stage screening device according to claims 1-9, characterized in that: The method comprises the following steps: The method comprises the following steps: Step one, the powder medicine is put into the hopper (3), and the screw feeder (2) is used to continuously and uniformly feed the medicine into the shell (1), and the air blower one (4) and the air blower two (5) are started to form the first air flow channel (8) and the second air flow channel (9) in the shell (1), the powder medicine enters the upper part of the screening mechanism (6) through the first air flow channel (8) to realize the screening work, the fine particle size medicine penetrates the screening mechanism (6), and the coarse particle size medicine is intercepted and then falls into the second air flow channel (9) to realize the secondary screening, so as to avoid the coarse particle size medicine mixed with the fine particle size medicine falling and affecting the screening effect, and the three screening mechanisms (6) and the three flow guide mechanisms (7) are used to realize the three screening operations, so as to realize the classification of the powder medicine, and the integrated material collecting and discharging mechanism (10) can collect the medicines of different grades, and the breathable material collecting bag (12) can collect the medicines of the smallest particle size; Step two, during the horizontal flow of the medicine under the action of wind force, the medicine first flows horizontally in the first air flow channel (8), the material guide top plate (17) realizes the horizontal guidance of the medicine, avoids the medicine from falling under the action of gravity in this process, and the medicine intercepted by the screening mechanism (6) enters the inside of the feeding slot (22), then falls through the discharging through hole (21) to the second air flow channel (9) to realize the secondary screening, the rotor vibration motor (20) drives the first arc-shaped elastic plate (18) to vibrate, so as to drive the whole flow guide mechanism (7) to vibrate, which is helpful for the rapid discharge of the medicine and avoids the blocking of the medicine; Step three, during the medicine screening process, the medicine first contacts the first screen (29), the fine particle size medicine passes through the first screen (29), the coarse particle size medicine is intercepted and then falls, realizes the secondary screening under the action of the wind speed in the second air flow channel (9), improves the screening accuracy, the first rubber sealing ring (24) and the second rubber sealing ring (25) can improve the sealing property of the connection between the support frame (23) and the shell (1), and realize the flexible connection at the same time, the vibration assembly (28) can drive the first screen (29) and the second screen (30) to vibrate as a whole, avoids the blocking of the first screen (29) and the second screen (30), and the spring (26) realizes the elastic buffering action; Step four, after three times of screening, four kinds of particle size medicines are formed, the previous three kinds of particle size medicines are collected and discharged through the integrated material collecting and discharging mechanism (10), and the smallest particle size medicine is collected through the breathable material collecting bag (12).

Images