Multi-stage medicine screening method and device

Abstract

The invention relates to the technical field of medicine screening equipment, discloses a multi-stage medicine screening method and equipment, and solves the problems that existing screening equipment is inconvenient to continuously screen and easy to block. The multi-stage medicine screening equipment comprises a shell, a spiral feeder is arranged at one end of the top of the shell, and a feeding hopper is arranged at the top end of the spiral feeder; a plurality of first air feeders are arranged at the top of one end in the shell, a plurality of second air feeders are arranged at the bottom of the end, close to the first air feeders, in the shell, three screening mechanisms and three flow guiding mechanisms are arranged in the shell, and the interior of the shell is divided into a first air feeding flow channel and a second air feeding flow channel through the three flow guiding mechanisms; three material collecting and discharging integrated mechanisms are arranged at the bottom end of the shell, an air exhaust flow guide cover is arranged at the end, away from the spiral feeder, of the shell, and a breathable material collecting bag is arranged at the bottom end of the air exhaust flow guide cover. Through the screening equipment, continuous screening can be achieved, and the anti-blocking effect is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of drug screening equipment, and specifically relates to a multi-stage drug screening method and equipment. Background Art

[0002] During the research and development and preparation of drugs, it is necessary to grind solid crystalline drug intermediates to facilitate the subsequent preparation of tablet or capsule drugs according to the preparation process. In this process, screening equipment is required to screen and classify powdery drugs. Existing screening devices are usually horizontally arranged multi-layer structures and are usually open structures. During the screening process, it is not convenient for continuous screening, easy to cause screen blockage and difficult to clean, and at the same time, it is easy to cause powder flying, resulting in poor use effect. Therefore, this application proposes a multi-stage drug screening method and equipment. Summary of the Invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a multi-stage drug screening method and equipment, effectively solving the problems that the existing screening equipment is not convenient for continuous screening and is easy to be blocked.

[0004] To achieve the above object, the present invention provides the following technical solutions: A multi-stage drug screening method and equipment, including a housing. One end of the top of the housing is fixedly provided with a screw feeder, the top end of the screw feeder is fixedly provided with a feeding hopper. At the top of one end inside the housing, a plurality of air blowers I are fixedly provided. At the bottom of the inside of the housing near the air blower I, a plurality of air blowers II are fixedly provided. Three screening mechanisms and three diversion mechanisms corresponding to the screening mechanisms one by one are arranged inside the housing. The three diversion mechanisms divide the inside of the housing into a first air flow channel and a second air flow channel. At the bottom end of the housing, three integrated aggregate discharging mechanisms located at the bottom of the diversion mechanisms are fixedly provided. One end of the housing far from the screw feeder is fixedly provided with an exhaust air diversion cover, and a breathable aggregate bag is arranged at the bottom end of the exhaust air diversion cover. One end of the front of the housing near the screw feeder is fixedly provided with a control panel;

[0005] The diversion mechanism is composed of a support column, an arc-shaped elastic jacket, a blanking 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 support column is fixedly connected to the bottom end inside the housing, the arc-shaped elastic jacket is fixedly connected to the top end of the support column through bolts, the blanking bottom plate is fixedly connected to the top end of the arc-shaped elastic jacket. A plurality of blanking through holes are opened at one end of the top of the blanking bottom plate far from the arc-shaped elastic jacket. Both the first arc-shaped elastic plate and the second arc-shaped elastic plate are fixedly connected to the top end of the blanking 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. An inlet slot is formed between the blanking bottom plate and one end of the material guiding top plate far 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 assembly, a first screen and a second screen. The support frame is connected to the inside of the housing through the first rubber sealing ring and the second rubber sealing ring. The springs are fixedly connected between the support frame and the housing. The vibration assembly 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 end and the bottom end inside the support frame.

[0007] Preferably, one end of the top of the material guiding top plate close to the second arc-shaped elastic plate is fixedly provided with a first inclined surface support seat. One end of the first inclined surface support seat away from the material guiding top plate is provided with an L-shaped support plate. One end of the L-shaped support plate away from the first inclined surface support seat is fixedly provided with a hollow rubber strip.

[0008] Preferably, one end of the top of the blanking bottom plate close to the feed chute opening is fixedly provided with a second inclined surface support seat. The top end of the second inclined surface support seat is fixedly provided with a rubber material guiding plate.

[0009] Preferably, one end of the bottom of the blanking bottom plate close to the second inclined surface support seat is fixedly provided with a mesh dispersion plate, and the mesh dispersion plate is located directly below the blanking through hole.

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

[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 rotationally 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. The electric telescopic rod is hinged between the support box and the ear plate.

[0012] Preferably, one end of the support box close to the first blower and the second blower is of a V-shaped inclined surface structure.

[0013] Preferably, the aggregate discharging integrated mechanism consists of an aggregate box and a spiral discharging machine. The aggregate box is fixedly connected to the bottom end of the housing. The spiral discharging machine is connected through the bottom end inside the aggregate box.

[0014] Preferably, a transverse diversion plate, a first inclined diversion plate and a second inclined diversion plate are fixedly arranged in the aggregate box from top to bottom in sequence, and the inclination angles of the first inclined diversion plate and the second inclined diversion plate are opposite.

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

[0016] Step 1: Put the powdery drug into the interior of the feeding hopper, continuously and evenly supply the drug into the interior of the housing through a screw feeder. At the same time, start Blower 1 and Blower 2, so that a first air flow channel and a second air flow channel are formed inside the housing. The powdery drug enters the upper position of the screening mechanism through the first air flow channel to achieve the screening operation. The fine-particle-size drug penetrates the screening mechanism, and the coarse-particle-size drug is intercepted and falls, and then enters the second air flow channel. The secondary screening is achieved through the second air flow channel to avoid the coarse-particle-size drug falling with the fine-particle-size drug and affecting the screening effect. Three screening operations are achieved through three screening mechanisms and three diversion mechanisms, so as to achieve the classification of the powdery drug. The aggregate discharging integrated mechanism can collect drugs of different grades, and the breathable aggregate bag can collect drugs with the smallest particle size;

[0017] Step 2: During the horizontal flow of the drug under the action of wind force, it first flows horizontally inside the first air flow channel. The material guiding top plate guides the drug horizontally to avoid the drug falling under the action of gravity during this process. The drug intercepted by the screening mechanism enters the interior of the feeding chute opening, and then falls through the blanking through-hole to the second air flow channel to achieve secondary screening. During this process, the rotor vibration motor drives the first arc-shaped elastic plate to vibrate, thereby driving the entire diversion mechanism to vibrate, which helps the drug to be discharged quickly and avoids drug blockage;

[0018] During the drug screening process, it first contacts the first screen. The fine-particle-size drug passes through the first screen, and the coarse-particle-size drug is intercepted and falls. The secondary screening is achieved under the action of the wind speed inside the second air flow channel to improve the screening accuracy. The first rubber sealing ring and the second rubber sealing ring can improve the connection tightness between the support frame and the housing, and at the same time achieve flexible connection. The vibration assembly can drive the first screen and the second screen to vibrate as a whole to avoid blockage of the first screen and the second screen. The spring realizes the elastic buffering function;

[0019] After three screenings, four kinds of particle-size drug powders will be formed. The aggregate discharging integrated mechanism is used to collect and discharge the first three kinds of particle-size drug powders, and the breathable aggregate bag is used to collect the drug powder with the smallest particle size.

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

[0021] (1) During the work, by setting Blower 1, Blower 2, and a screening mechanism composed of a support frame, a first rubber sealing ring, a second rubber sealing ring, a plurality of springs, a plurality of support arms, a vibration assembly, a first screen and a second screen, multi-stage screening of the drug powder can be achieved, the classification treatment of the powdery drug can be realized, continuous feeding can be achieved by using the air flow effect, continuous screening can be realized, and at the same time, the screening efficiency can be improved;

[0022] (2) By setting up a diversion mechanism composed of support columns, arc-shaped elastic jackets, blanking bottom plates, material guiding top plates, first arc-shaped elastic plates, second arc-shaped elastic plates, and rotor vibration motors, it is possible to achieve the diversion of medicinal powder and form a first air supply flow channel and a second air supply flow channel, so as to realize the two-stage screening of medicinal powder within the same screening mechanism, improving the sufficiency and accuracy of screening;

[0023] (3) By setting up a vibration assembly composed of a support box, two short shafts, a linear vibration motor, ear plates, and electric telescopic rods, the vibration direction can be adjusted, so that the screening mechanism can vibrate vertically and horizontally, effectively avoiding blockage of the screening mechanism;

[0024] (4) By setting up an integrated aggregate discharging mechanism composed of an aggregate box and a spiral discharging mechanism, and setting up a horizontal diversion plate, an inclined diversion plate I, and an inclined diversion plate II, it is possible to discharge the screened medicinal powder while avoiding the interference of the medicinal powder by the air flow. Description of the Drawings

[0025] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0026] In the drawings:

[0027] Figure 1 is a schematic structural diagram of the multi-stage screening equipment for drugs of the present invention;

[0028] Figure 2 is a schematic internal structural diagram of the multi-stage screening equipment for drugs of the present invention;

[0029] Figure 3 is a schematic structural diagram of the diversion mechanism and the screening mechanism of the present invention;

[0030] Figure 4 is a schematic structural diagram of the diversion mechanism of the present invention;

[0031] Figure 5 is for the present invention Figure 4 partial enlarged view at A in;

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

[0033] Figure 7 is a schematic structural diagram of the vibration assembly of the present invention;

[0034] Figure 8 is a schematic structural diagram of the integrated aggregate discharging mechanism of the present invention;

[0035] In the figure: 1. housing; 2. screw feeder; 3. feeding hopper; 4. first air blower; 5. second air blower; 6. screening mechanism; 7. diversion mechanism; 8. first air flow channel; 9. second air flow channel; 10. integrated aggregate discharging mechanism; 11. exhaust air diversion hood; 12. breathable aggregate bag; 13. control panel; 14. support column; 15. arc-shaped elastic jacket; 16. blanking bottom plate; 17. material guiding top plate; 18. first arc-shaped elastic plate; 19. second arc-shaped elastic plate; 20. rotor vibration motor; 21. blanking through hole; 22. feeding slot; 23. support frame; 24. first rubber sealing ring; 25. second rubber sealing ring; 26. spring; 27. support arm; 28. vibration assembly; 29. first screen; 30. second screen; 31. first inclined surface support seat; 32. L-shaped support plate; 33. hollow rubber strip; 34. second inclined surface support seat; 35. rubber material guiding plate; 36. mesh hole dispersion plate; 37. first metal positioning retaining ring; 38. second metal positioning retaining ring; 39. support box; 40. short shaft; 41. linear vibration motor; 42. ear plate; 43. electric telescopic rod; 44. aggregate box; 45. screw discharging machine; 46. transverse diversion plate; 47. first inclined diversion plate; 48. second inclined diversion plate. Detailed implementation manner

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] The embodiment is given by Figures 1 to 8 For a drug multi-stage screening method and device of the present invention, it includes a housing 1. One end of the top of the housing 1 is fixedly provided with a screw feeder 2. The top end of the screw feeder 2 is fixedly provided with a feeding hopper 3. Several first air blowers 4 are fixedly provided at the top of one end inside the housing 1. Several second air blowers 5 are fixedly provided at the bottom of the end inside the housing 1 close to the first air blowers 4. Three screening mechanisms 6 and three diversion mechanisms 7 corresponding to the screening mechanisms 6 one by one are arranged inside the housing 1. The three diversion 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 aggregate discharging mechanisms 10 located at the bottom of the diversion mechanisms 7 are fixedly provided at the bottom end of the housing 1. An exhaust air diversion hood 11 is fixedly provided at one end of the housing 1 away from the screw feeder 2. A breathable aggregate bag 12 is provided at the bottom end of the exhaust air diversion hood 11. A control panel 13 is fixedly provided at one end of the front surface of the housing 1 close to the screw feeder 2;

[0038] Put the powdered medicine into the inside of the feeding hopper 3, continuously and evenly supply the medicine to the inside of the housing 1 through the screw feeder 2. At the same time, start the first blower 4 and the second blower 5, so that a first air flow channel 8 and a second air flow channel 9 are formed inside the housing 1. The powdered medicine enters the upper position of the screening mechanism 6 through the first air flow channel 8 to realize the screening work. The medicine with fine particle size penetrates the screening mechanism 6, and the medicine with coarse particle size is intercepted and then falls, and then enters the second air flow channel 9. Through the second air flow channel 9, secondary screening is realized to avoid the influence of the falling of the medicine with coarse particle size mixed with the medicine with fine particle size on the screening effect. Three screening operations are realized through three screening mechanisms 6 and three diversion mechanisms 7, so as to realize the classification of the powdered medicine. The aggregate discharging integrated mechanism 10 can collect medicines of different grades, and the breathable aggregate bag 12 realizes the collection of medicines with the smallest particle size;

[0039] The diversion mechanism 7 is composed of a support column 14, an arc-shaped elastic jacket 15, a blanking 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 housing 1, and the arc-shaped elastic jacket 15 is fixedly connected to the top end of the support column 14 through bolts. The blanking bottom plate 16 is fixedly connected to the top end of the arc-shaped elastic jacket 15. A plurality of blanking through holes 21 are opened at one end of the top of the blanking bottom plate 16 away from the arc-shaped elastic jacket 15. Both the first arc-shaped elastic plate 18 and the second arc-shaped elastic plate 19 are fixedly connected to the top end of the blanking bottom plate 16. The rotor vibration motor 20 is fixedly connected to one side of the first arc-shaped elastic plate 18 close to the second arc-shaped elastic plate 19. An inlet chute 22 is formed between the blanking bottom plate 16 and one end of the material guiding top plate 17 away from the second arc-shaped elastic plate 19;

[0040] During the horizontal flow of the medicine under the action of wind force, it first flows horizontally inside the first air flow channel 8, and the material guiding top plate 17 realizes the horizontal guiding of the medicine to avoid the falling of the medicine under the action of gravity during this process. The medicine intercepted by the screening mechanism 6 enters the inside of the inlet chute 22, and then falls through the blanking through holes 21 to the second air flow channel 9 to realize secondary screening. During this process, the rotor vibration motor 20 drives the first arc-shaped elastic plate 18 to vibrate, thereby driving the whole diversion mechanism 7 to vibrate, which helps the medicine to be discharged quickly and avoid medicine blockage;

[0041] The screening mechanism 6 is composed of a support frame 23, a first rubber sealing ring 24, a second rubber sealing ring 25, a number of springs 26, a number 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 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 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;

[0042] In the drug screening process, it first contacts the first screen 29. Fine-particle drugs pass through the first screen 29, and the coarse-particle drugs are intercepted and then fall. Under the action of the wind speed inside the second air flow channel 9, secondary screening is realized, improving the screening accuracy. The first rubber sealing ring 24 and the second rubber sealing ring 25 can improve the connection tightness between the support frame 23 and the housing 1, and at the same time realize flexible connection. The vibration assembly 28 can drive the first screen 29 and the second screen 30 to vibrate as a whole, avoiding blockage of the first screen 29 and the second screen 30. The springs 26 play an elastic buffering role;

[0043] At one end of the top of the material guiding top plate 17 close to the second arc-shaped elastic plate 19, a first inclined surface support seat 31 is fixedly arranged. At one end of the first inclined surface support seat 31 away from the material guiding top plate 17, an L-shaped support plate 32 is arranged. At one end of the L-shaped support plate 32 away from the first inclined surface support seat 31, a hollow rubber strip 33 is fixedly arranged, which can be flexibly attached to another adjacent screening mechanism 6, improving the tightness and buffering effect, so that the air in the first air flow channel 8 and the second air flow channel 9 flows independently, avoiding mutual influence;

[0044] At one end of the top of the blanking bottom plate 16 close to the feed slot 22, a second inclined surface support seat 34 is fixedly arranged. At the top end of the second inclined surface support seat 34, a rubber material guiding plate 35 is fixedly arranged, which can guide the coarse-particle powder inside the first air flow channel 8, so that the powder fully enters the blanking through hole 21;

[0045] At one end of the bottom of the blanking bottom plate 16 close to the second inclined surface support seat 34, a mesh dispersion plate 36 is fixedly arranged. The mesh dispersion plate 36 is located directly below the blanking through hole 21. When the powder falls into the second air flow channel 9, it realizes the dispersion of the powder, avoiding the influence on the screening effect due to the overly concentrated blanking of the powder;

[0046] The first rubber sealing ring 24 is connected to the inner side wall of the housing 1 through a metal positioning pressing ring 37, and the second rubber sealing ring 25 is connected to the inner side wall of the housing 1 through a metal positioning pressing 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 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 to the support arm 27. The linear vibration motor 41 is rotationally 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 realize vertical and horizontal vibration adjustment. During adjustment, the electric telescopic rod 43 drives the linear vibration motor 41 to rotate around the short shaft 40. Through vertical and horizontal vibration adjustment, it can effectively prevent the first screen 29 and the second screen 30 from being blocked;

[0049] One end of the support box 39 close to the first air blower 4 and the second air blower 5 is of a V-shaped inclined surface structure, which can guide the incoming air and avoid excessive resistance to the incoming air;

[0050] The aggregate discharging integrated mechanism 10 is composed of an aggregate box 44 and a screw discharging machine 45. The aggregate box 44 is fixedly connected to the bottom end of the housing 1. The screw discharging machine 45 is connected through the bottom end inside the aggregate box 44. The aggregate box 44 realizes the collection of the screened medicinal powder, and the screw discharging machine 45 can discharge the medicinal powder;

[0051] Inside the aggregate box 44, a transverse guide plate 46, an inclined guide plate one 47 and an inclined guide plate two 48 are fixedly arranged in sequence from top to bottom. The inclined angles of the inclined guide plate one 47 and the inclined guide plate two 48 are opposite, which can form an S-shaped material discharging channel and avoid the influence of the second air flow channel 9 on the medicinal powder inside the aggregate box 44;

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

[0053] Step 1: Put the powdery drug into the inside of the feeding hopper 3, continuously and evenly supply the material to the inside of the housing 1 through the screw feeder 2. At the same time, start the first air blower 4 and the second air blower 5, so that a first air flow channel 8 and a second air flow channel 9 are formed inside the housing 1. The powdery drug enters the upper position of the screening mechanism 6 through the first air flow channel 8 to realize the screening work. The fine-particle-size drug penetrates the screening mechanism 6, and the coarse-particle-size drug is intercepted and falls, and then enters the second air flow channel 9, and the secondary screening is realized through the second air flow channel 9 to avoid the influence of the coarse-particle-size drug mixed with the fine-particle-size drug falling on the screening effect. Through three screening mechanisms 6 and three guiding mechanisms 7, three screening operations are realized, so as to realize the classification of the powdery drug. The aggregate discharging integrated mechanism 10 can realize the collection of drugs of different grades, and the breathable aggregate bag 12 realizes the collection of drugs with the smallest particle size;

[0054] Step 2: During the lateral flow of the drug under the action of wind force, it first flows horizontally inside the first air supply channel 8. The material guiding top plate 17 guides the drug horizontally to prevent the drug from falling under the action of gravity during this process. The drug intercepted by the screening mechanism 6 enters the inside of the feeding chute opening 22, and then falls through the blanking 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 diversion mechanism 7 to vibrate, which helps the drug to be discharged quickly and avoids drug blockage.

[0055] Step 3: During the drug screening process, the drug first contacts the first screen 29. The fine-particle-size drug passes through the first screen 29, and the coarse-particle-size drug is intercepted and then falls. It undergoes secondary screening under the action of the wind speed inside the second air supply channel 9 to improve the screening accuracy. The first rubber sealing ring 24 and the second rubber sealing ring 25 can improve the sealing performance between the support frame 23 and the housing 1 and achieve 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 to avoid blockage of the first screen 29 and the second screen 30, and the spring 26 realizes the elastic buffering function.

[0056] Step 4: After three screenings, four kinds of particle-size powders are formed. The first three kinds of particle-size powders are collected and discharged through the aggregate discharging integrated mechanism 10, and the powder with the smallest particle size is collected through the breathable aggregate bag 12.

[0057] During operation, by setting the first air blower, the second air blower, and the screening mechanism composed of a support frame, a first rubber sealing ring, a second rubber sealing ring, a number of springs, a number of support arms, a vibration assembly, a first screen, and a second screen, multi-stage screening of the powder can be realized, grading treatment of the powdery drug can be achieved, continuous feeding can be realized by the action of air flow, continuous screening can be realized, and at the same time, the screening efficiency can be improved; by setting the diversion mechanism composed of support columns, arc-shaped elastic sleeves, blanking bottom plates, material guiding top plates, first arc-shaped elastic plates, second arc-shaped elastic plates, and rotor vibration motors, diversion of the powder can be realized, and the first air supply channel and the second air supply channel can be formed, and secondary screening of the powder can be realized inside the same screening mechanism to improve the sufficiency and accuracy of screening; by setting the vibration assembly composed of a support box, two short shafts, a linear vibration motor, ear plates, and electric telescopic rods, the vibration direction can be adjusted, so that the screening mechanism can vibrate vertically and horizontally, effectively avoiding blockage of the screening mechanism; by setting the aggregate discharging integrated mechanism composed of an aggregate box and a spiral discharging mechanism, and setting a lateral diversion plate, an inclined diversion plate 1, and an inclined diversion plate 2, the screened powder can be discharged, and at the same time, the powder is prevented from being interfered by the air flow.

Claims

1. A multi-stage drug screening device, comprising a housing (1), characterized in that: One end at the top of the housing (1) is fixedly provided with a screw feeder (2), the top end of the screw feeder (2) is fixedly provided with a feeding hopper (3), several first air blowers (4) are fixedly arranged at the top of one end inside the housing (1), several second air blowers (5) are fixedly arranged at the bottom of one end inside the housing (1) close to the first air blowers (4), three screening mechanisms (6) and three diversion mechanisms (7) corresponding to the screening mechanisms (6) one by one are arranged inside the housing (1), the three diversion mechanisms (7) divide the interior of the housing (1) into a first air flow channel (8) and a second air flow channel (9), three aggregate discharging integrated mechanisms (10) located at the bottom of the diversion mechanisms (7) are fixedly arranged at the bottom end of the housing (1), an exhaust air diversion cover (11) is fixedly arranged at one end of the housing (1) away from the screw feeder (2), a breathable aggregate bag (12) is arranged at the bottom end of the exhaust air diversion cover (11), and a control panel (13) is fixedly arranged at one end of the front surface of the housing (1) close to the screw feeder (2); The diversion mechanism (7) is composed of a support column (14), an arc-shaped elastic jacket (15), a blanking 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 housing (1), the arc-shaped elastic jacket (15) is fixedly connected to the top end of the support column (14) by bolts, the blanking bottom plate (16) is fixedly connected to the top end of the arc-shaped elastic jacket (15), several blanking through holes (21) are formed at one end of the top of the blanking 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 blanking bottom plate (16), the rotor vibration motor (20) is fixedly connected to one side of the first arc-shaped elastic plate (18) close to the second arc-shaped elastic plate (19), and a feed slot (22) is formed between the blanking bottom plate (16) and one end of the material guiding top plate (17) 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), several springs (26), several 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 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 assembly (28) is connected to the middle position inside the support frame (23) through the support arms (27), and 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 multi-level drug screening device according to claim 1, characterized in that: At one end of the top of the material guiding top plate (17) close to the second arc-shaped elastic plate (19), a first inclined surface support seat (31) is fixedly arranged. At one end of the first inclined surface support seat (31) away from the material guiding top plate (17), an L-shaped support plate (32) is arranged. At one end of the L-shaped support plate (32) away from the first inclined surface support seat (31), a hollow rubber strip (33) is fixedly arranged.

3. A drug multi - level screening device according to claim 1, characterized in that: At one end of the top of the blanking bottom plate (16) close to the feed chute opening (22), a second inclined surface support seat (34) is fixedly arranged. At the top end of the second inclined surface support seat (34), a rubber material guiding plate (35) is fixedly arranged.

4. A multi-level drug screening device according to claim 3, characterized in that: At one end of the bottom of the blanking bottom plate (16) close to the second inclined surface support seat (34), a mesh dispersion plate (36) is fixedly arranged. The mesh dispersion plate (36) is located directly below the blanking through hole (21).

5. A multi-level drug screening device according to claim 1, characterized in that: The first rubber sealing ring (24) is connected to the inner side wall of the housing (1) through a first metal positioning pressing ring (37), and the second rubber sealing ring (25) is connected to the inner side wall of the housing (1) through a second metal positioning pressing ring (38).

6. The multi-level drug screening device according to claim 1, characterized in that: 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 to the support arm (27). The linear vibration motor (41) is rotationally connected to the inside of the support box (39) through 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).

7. A multi-level drug screening device according to claim 6, characterized in that: One end of the support box (39) close to the first air blower (4) and the second air blower (5) is of a V-shaped inclined surface structure.

8. A multi-stage drug screening device according to claim 1, characterized in that: The aggregate discharging integrated mechanism (10) is composed of an aggregate box (44) and a screw discharging machine (45). The aggregate box (44) is fixedly connected to the bottom end of the housing (1). The screw discharging machine (45) is connected through the bottom end inside the aggregate box (44).

9. A multi-stage drug screening device according to claim 8, characterized in that: Inside the aggregate box (44), a transverse diversion plate (46), a first inclined diversion plate (47), and a second inclined diversion plate (48) are fixedly arranged in sequence from top to bottom. The inclination angles of the first inclined diversion plate (47) and the second inclined diversion plate (48) are opposite.

10. A screening method for a multi-stage screening device of a drug as described in claims 1-9, characterized in that: Including the following steps: Step 1: Put the powdered drug into the interior of the feeding hopper (3), continuously and evenly supply the drug into the interior of the housing (1) through the screw feeder (2). At the same time, start the first air blower (4) and the second air blower (5) so that a first air flow channel (8) and a second air flow channel (9) are formed inside the housing (1). The powdered drug enters the upper position of the screening mechanism (6) through the first air flow channel (8) to achieve the screening operation. The fine-particle-size drug penetrates the screening mechanism (6), and the coarse-particle-size drug is intercepted and falls, and then enters the second air flow channel (9). The second air flow channel (9) is used for secondary screening to prevent the coarse-particle-size drug from falling mixed with the fine-particle-size drug and affecting the screening effect. Three screening operations are achieved through three screening mechanisms (6) and three diversion mechanisms (7), so as to classify the powdered drug. The aggregate discharging integrated mechanism (10) can collect drugs of different grades, and the breathable aggregate bag (12) can collect the drug with the smallest particle size; Step 2: During the horizontal flow of the drug under the action of wind force, it first flows horizontally inside the first air flow channel (8). The material guiding top plate (17) guides the drug horizontally to prevent the drug from falling under the action of gravity during this process. The drug intercepted by the screening mechanism (6) enters the interior of the feeding chute opening (22), and then falls through the blanking through hole (21) into the second air flow channel (9) to achieve secondary screening. During this process, the rotor vibration motor (20) drives the first arc-shaped elastic plate (18) to vibrate, thereby driving the entire diversion mechanism (7) to vibrate, which helps the drug to be discharged quickly and prevents drug blockage; Step 3: During the drug screening process, the drug first contacts the first screen (29). The fine-particle-size drug passes through the first screen (29), and the coarse-particle-size drug is intercepted and falls. Secondary screening is achieved under the action of the wind speed inside the second air flow channel (9) to improve the screening accuracy. The first rubber sealing ring (24) and the second rubber sealing ring (25) can improve the connection tightness between the support frame (23) and the housing (1), and at the same time achieve flexible connection. The vibration assembly (28) can drive the first screen (29) and the second screen (30) to vibrate as a whole to prevent the first screen (29) and the second screen (30) from being blocked. The spring (26) realizes the elastic buffering function; Step 4: After three screenings, four kinds of powdered drugs with different particle sizes are formed. The aggregate discharging integrated mechanism (10) is used to collect and discharge the powdered drugs of the first three particle sizes, and the breathable aggregate bag (12) is used to collect the powdered drug with the smallest particle size.

Images