Vacuum drying machine for medicine refining

Abstract

The invention relates to the technical field of vacuum dryers, and discloses a medicine refining vacuum dryer which comprises a base, a drying cylinder is connected to the base through a rotating assembly, a cylinder cover is arranged on the drying cylinder, a vacuum pump is fixedly installed on the cylinder cover, and one end of a connecting pipe is connected to the vacuum pump; the other end of the connecting pipe is fixedly connected with the cylinder cover, and a heating module and a separating and drying assembly assembled on the drying cylinder are fixedly mounted on the drying cylinder; a vacuum pump is started to pump out air in the drying cylinder, a heating module is started to heat and dry the medicine in the drying cylinder, at the moment, a first motor is controlled to operate to be matched with a belt to drive a mounting rod to rotate, the mounting rod rotates to drive separation rings to rotate in the drying cylinder, and the medicine in the innermost separation ring rolls over; the positions and the directions of medicine particles can be continuously changed, uniform heating is achieved, the medicine particles can be separated through the separation holes, and medicine can be classified conveniently.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum dryers, and more specifically to a medicine refining vacuum dryer. Background Art

[0002] The vacuum dryer is a device that removes moisture from the parts of the packaging container by extracting the air inside the packaging container to a predetermined vacuum degree. The food material to be dried is placed in a closed drying chamber. While the vacuum system is used to evacuate the air, the material to be dried is appropriately heated so that the moisture inside the material diffuses to the surface through pressure difference or concentration difference. After the water molecules gain enough kinetic energy on the surface of the material, they escape into the low-pressure air in the vacuum chamber and are then extracted by the vacuum pump.

[0003] The existing Chinese patent with the announcement number CN117647064A discloses a vacuum dryer, which includes a frame, a tank body rotatably arranged on the frame and containing materials to be dried, a jacket sleeved on the outside of the tank body, a filter device arranged in the tank body, and a vacuum pipe connected to the filter device and an external exhaust device respectively, a ring-shaped heating channel for heating medium is formed between the jacket and the outer side of the tank body, and the vacuum dryer also includes a gas blowback pipe connected to the filter device and passing inert gas. During the operation of the vacuum dryer, inert gas is intermittently passed to the filter device through the gas blowback pipe, so that the material blocked at the filter hole of the filter device is blown back, so that the steam can be discharged smoothly, and the material can achieve the best drying effect.

[0004] With respect to the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: when existing medicines are dried using a vacuum dryer, when medicine particles of different specifications are mixed and piled, larger pores are formed between the large particles, while small particles fill in the gaps between the large particles, hindering the circulation of hot air and reducing the drying efficiency. In addition, it is difficult to accurately classify medicine particles of different specifications according to the specifications during the drying process. Summary of the invention

[0005] The present invention provides a vacuum dryer for drug refining, which solves the technical problems in the related art that when drug particles of different specifications are mixed and piled, larger pores are formed between the large particles, and small particles are filled in the gaps between the large particles, which hinders the circulation of hot air and reduces the drying efficiency, and the drug particles of different specifications are difficult to be accurately classified according to the specifications during the drying process.

[0006] The present invention provides a drug refining vacuum dryer, comprising a base, a drying cylinder connected to the base via a rotating assembly, a cylinder cover provided on the drying cylinder, a vacuum pump fixedly installed on the cylinder cover, one end of a connecting pipe connected to the vacuum pump, the other end of the connecting pipe fixedly connected to the cylinder cover, and a heating module fixedly installed on the drying cylinder; A separation and drying component is mounted on a drying cylinder, the separation and drying component comprises a first fixed plate and a second fixed plate, a plurality of placement grooves with diameters gradually increasing from the inside to the outside are provided on the surfaces of the first fixed plate and the second fixed plate, a separation ring matching its size is provided in each of the placement grooves, the separation rings are provided with separation holes, the apertures of the separation holes on the separation rings decrease successively from the inside to the outside, during the drying process, the separation ring cooperates with the driving component to rotate the medicine to make it uniform, and during the drying process, medicines of different sizes are separated and classified.

[0007] As a further optimization scheme of the present invention, the separation and drying component also includes a mounting rod rotatably mounted on the drying cylinder and driven by the driving component, the first fixing plate is fixedly mounted on the mounting rod, a threaded groove is provided on the mounting rod, and the second fixing plate is threadedly mounted on the mounting rod through the threaded groove.

[0008] As a further optimization scheme of the present invention, the rotating assembly includes a rotating ring rotatably mounted on the base, an inner ring is detachably mounted on the rotating ring, the drying cylinder is fixedly connected to the inner ring, a first mounting plate is fixedly mounted on the base, a driving motor is fixedly mounted on the first mounting plate, a driving tooth is fixedly mounted on the output end of the driving motor, and a driven tooth cooperating with the driving tooth is fixedly mounted on the rotating ring.

[0009] As a further optimization scheme of the present invention, the driving assembly includes a second mounting plate fixedly mounted on the drying cylinder, a first motor is fixedly mounted on the second mounting plate, a belt is sleeved on the output shaft of the first motor, and the other side of the belt is sleeved on the mounting rod.

[0010] As a further optimization solution of the present invention, a leveling component is provided on the mounting rod, and the leveling plate included in the leveling component is used to level the medicines in the inner separation ring.

[0011] As a further optimization scheme of the present invention, the leveling assembly also includes a movable groove opened on the mounting rod, a slider is slidably installed in the movable groove, a bearing is fixedly installed on the slider, the toggle plate is fixedly installed on the bearing, a mounting box is fixedly installed on the mounting rod, a second motor is fixedly installed in the mounting box, one end of a connecting rope is connected to the output shaft of the second motor, the other end of the connecting rope is fixedly installed on the slider, one end of a spring is connected to the slider, and the other end of the spring is fixedly connected to the inner wall of the movable groove.

[0012] As a further optimization solution of the present invention, the toggle plate is fan-shaped and has a plurality of through grooves on its surface.

[0013] As a further optimization solution of the present invention, a flow guide assembly is arranged on the first mounting plate, and the flow guide assembly includes a positioning rod fixedly mounted on the first mounting plate, and a spiral guide plate is fixedly mounted on the positioning rod.

[0014] As a further optimization solution of the present invention, the outer edge portion of the spiral guide plate contacts the inner wall of the drying cylinder.

[0015] As a further optimization solution of the present invention, an annular elastic plate is fixedly mounted on the innermost separation ring, and the annular elastic plate cooperates with the toggle plate.

[0016] The beneficial effects of the present invention are: 1. The present invention controls the operation of the first motor to cooperate with the belt to drive the installation rod to rotate. When the installation rod rotates, it drives the separation ring to rotate in the drying cylinder. The medicine in the innermost separation ring rolls, and the medicine particles can continuously change their position and direction, reducing the drying dead corners, thereby achieving uniform heating and shortening the drying time. At the same time, it avoids small particles of medicine filling in the pores of large particles of medicine, which hinders the circulation of hot air and affects the drying efficiency.

[0017] 2. The present invention enables the toggle plate to reciprocate in the separation ring to toggle the drug particles. The friction and impact between the drug particles can destroy the agglomeration phenomenon and keep the particles in a dispersed state, which helps to prevent the problem of uneven drying caused by the agglomeration of drug particles and further improves the drying efficiency.

[0018] 3. The present invention provides a spiral guide plate, so that the moisture generated by drying inside the drying cylinder is effectively guided and concentrated, and with the continuous rotation of the spiral guide plate, the moisture is gradually guided to the extraction point of the vacuum pump, which increases the contact opportunity between the moisture and the connecting pipe, and can significantly improve the moisture extraction efficiency, ensure the rapid discharge of moisture inside the dryer, and thus optimize the drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure in which the drying cylinder is assembled on the base in the present invention; Figure 3 It is a schematic diagram of the structure of the unfolded rotating assembly of the present invention; Figure 4 It is a schematic cross-sectional view of the drying cylinder of the present invention; Figure 5 It is a schematic diagram of the structure after the first fixing plate and the second fixing plate of the present invention are assembled; Figure 6 It is a schematic diagram of the matching structure of the mounting rod and the driving assembly of the present invention; Figure 7 It is a schematic diagram of the assembly structure of the toggle plate and the bearing of the present invention; Figure 8 It is a schematic diagram of the overall structure of the flow guide assembly in the present invention.

[0020] In the figure: 10. Base; 11. Drying cylinder; 12. Vacuum pump; 13. Connecting pipe; 14. Heating module; 15. Cylinder cover; 20. Rotating assembly; 21. First mounting plate; 22. Driving motor; 23. Driving gear; 24. Rotating ring; 25. Inner ring; 26. Driven gear; 30. Separation and drying assembly; 31. Mounting rod; 32. First fixing plate; 33. Placement groove; 34. Separation ring; 35. Second fixing plate; 36. Threaded groove; 40. driving assembly; 41. second mounting plate; 42. first motor; 43. belt; 50. Leveling assembly; 51. Mounting box; 52. Second motor; 53. Movable slot; 54. Connecting rope; 55. Spring; 56. Bearing; 57. Toggle plate; 58. Slider; 60. flow guide assembly; 61. positioning rod; 62. spiral guide plate; 70. Annular elastic plate. DETAILED DESCRIPTION

[0021] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0022] like Figures 1 to 5As shown, a drug refining vacuum dryer provided by an embodiment of the present invention comprises a base 10, a drying cylinder 11 is connected to the base 10 via a rotating assembly 20, a cylinder cover 15 is provided on the drying cylinder 11, a vacuum pump 12 is fixedly installed on the cylinder cover 15, one end of a connecting pipe 13 is connected to the vacuum pump 12, the other end of the connecting pipe 13 is fixedly connected to the cylinder cover 15, and a heating module 14 is fixedly installed on the drying cylinder 11; The separation and drying component 30 is assembled on the drying cylinder 11, and the separation and drying component 30 includes a first fixed plate 32 and a second fixed plate 35. A plurality of placement grooves 33 with diameters gradually increasing from the inside to the outside are provided on the surfaces of the first fixed plate 32 and the second fixed plate 35. A separation ring 34 adapted to its size is provided in each of the placement grooves 33. The separation rings 34 are provided with separation holes, and the apertures of the separation holes on the separation rings 34 decrease successively from the inside to the outside. During the drying process, the separation rings 34 cooperate with the driving component 40 to rotate the medicines to make them uniform, and separate and classify medicines of different sizes during the drying process.

[0023] The separation and drying assembly 30 also includes a mounting rod 31 rotatably mounted on the drying cylinder 11 and driven by the driving assembly 40. The first fixing plate 32 is fixedly mounted on the mounting rod 31. A threaded groove 36 is provided on the mounting rod 31. The second fixing plate 35 is threadedly mounted on the mounting rod 31 through the threaded groove 36.

[0024] The rotating assembly 20 includes a rotating ring 24 rotatably mounted on the base 10, an inner ring 25 is detachably mounted on the rotating ring 24, the drying cylinder 11 is fixedly connected to the inner ring 25, a first mounting plate 21 is fixedly mounted on the base 10, a driving motor 22 is fixedly mounted on the first mounting plate 21, a driving tooth 23 is fixedly mounted on the output end of the driving motor 22, and a driven tooth 26 that cooperates with the driving tooth 23 is fixedly mounted on the rotating ring 24.

[0025] The driving assembly 40 includes a second mounting plate 41 fixedly mounted on the drying cylinder 11 , a first motor 42 fixedly mounted on the second mounting plate 41 , a belt 43 sleeved on the output shaft of the first motor 42 , and the other side of the belt 43 sleeved on the mounting rod 31 .

[0026] In order to avoid the formation of larger pores between large particles when different specifications of pharmaceutical particles are mixed and piled up, small particles fill the gaps between large particles, hindering the circulation of hot air and reducing drying efficiency.

[0027] When the present invention dries the drug particles, the driving motor 22 is controlled to drive the driving gear 23 to rotate, and the driving gear 23 cooperates with the driven gear 26 to drive the rotating ring 24 and the drying cylinder 11 to rotate, so that the drying cylinder 11 is inclined and the opening is located at a high point (to facilitate pouring the drug particles), and the drug is poured into the innermost separation ring 34 of the drying cylinder 11, and then the second fixing plate 35 is rotated to make it move along the thread groove 36 on the mounting rod 31 until it abuts against the separation ring 34; Then, the cylinder cover 15 is installed, and the driving motor 22 is controlled to drive the drying cylinder 11 to reset, the vacuum pump 12 is started to extract the air in the drying cylinder 11, and the heating module 14 is started to heat and dry the medicine in the drying cylinder 11. At this time, the first motor 42 is controlled to operate and cooperate with the belt 43 to drive the installation rod 31 to rotate. When the installation rod 31 rotates, it drives the separation ring 34 to rotate in the drying cylinder 11. The medicine in the innermost separation ring 34 rolls, and the medicine particles can continuously change their position and direction, reducing the drying dead corner, thereby achieving uniform heating and shortening the drying time. At the same time, it avoids small particles of medicine filling in the pores of large particles of medicine, hindering the circulation of hot air and affecting the drying efficiency. In the rolling process, the medicine particles of different specifications will move step by step along the separation hole to the outer separation ring 34, which can separate the medicine particles of different specifications and facilitate the classification and processing of the medicines. After drying is completed, the cylinder cover 15 and the second fixing plate 35 are removed, and the driving motor 22 is started again to rotate and tilt the drying cylinder 11. At this time, the opening of the drying cylinder 11 is at a low point, which is convenient for the unloading operation of the medicine.

[0028] like Figures 5 to 7 As shown, a leveling assembly 50 is provided on the mounting rod 31, and a toggle plate 57 included in the leveling assembly 50 is used to level the medicine in the inner separation ring 34, and the leveling assembly 50 also includes a movable groove 53 opened on the mounting rod 31, a slider 58 is slidably installed in the movable groove 53, a bearing 56 is fixedly installed on the slider 58, and the toggle plate 57 is fixedly installed on the bearing 56, a mounting box 51 is fixedly installed on the mounting rod 31, and a second motor 52 is fixedly installed in the mounting box 51, one end of a connecting rope 54 is connected to the output shaft of the second motor 52, and the other end of the connecting rope 54 is fixedly installed on the slider 58, one end of a spring 55 is connected to the slider 58, and the other end of the spring 55 is fixedly connected to the inner wall of the movable groove 53; When the pharmaceutical particles are being dried, the output shaft of the second motor 52 is controlled to rotate and reel in the connecting rope 54. The connecting rope 54 drives the slider 58 to slide in the movable groove 53 and stretch the spring 55. When the slider 58 slides, it cooperates with the bearing 56 to drive the toggle plate 57 to move in the innermost separation ring 34. When the toggle plate 57 reaches the set position, the output shaft of the second motor 52 rotates in the opposite direction to release the binding on the connecting rope 54. At this time, the spring 55 drives the slider 58 to reset, so that the toggle plate 57 can reciprocate in the separation ring 34 to toggle the pharmaceutical particles. The friction and impact between the pharmaceutical particles can destroy the agglomeration phenomenon and keep the particles in a dispersed state, which helps to prevent the problem of uneven drying caused by the agglomeration of pharmaceutical particles and further improves the drying efficiency.

[0029] like Figure 7 As shown, the toggle plate 57 is fan-shaped and has a plurality of through grooves on its surface. Under the influence of gravity, the fan-shaped vertex of the toggle plate 57 matched with the bearing 56 can always face directly downward.

[0030] like Figure 8 As shown, a guide assembly 60 is provided on the first mounting plate 21, and the guide assembly 60 includes a positioning rod 61 fixedly mounted on the first mounting plate 21, and a spiral guide plate 62 is fixedly mounted on the positioning rod 61; when the mounting rod 31 drives the first fixed plate 32 to rotate, the positioning rod 61 cooperates with it to drive the spiral guide plate 62 to rotate together, and when the spiral guide plate 62 rotates, the moisture generated by drying inside the drying cylinder 11 is effectively guided and concentrated, and with the continuous rotation of the spiral guide plate 62, the moisture is gradually guided to the extraction point of the vacuum pump 12, which increases the contact opportunity between the moisture and the connecting pipe 13, can significantly improve the moisture extraction efficiency, ensure the rapid discharge of moisture inside the dryer, and thus optimize the drying efficiency.

[0031] It should be noted that when moisture is extracted by the vacuum pump 12, the temperature and pressure inside the drying cylinder 11 will decrease due to the negative pressure. When the temperature of the moisture drops below the dew point and the temperature of the inner wall of the equipment is also relatively low, the water vapor in the moisture will condense into water droplets on cold surfaces such as the inner wall of the equipment, especially during the cooling stage of the equipment or when poor sealing causes outside air to enter.

[0032] The outer edge of the spiral guide plate 62 contacts the inner wall of the drying cylinder 11. The outer edge of the spiral guide plate 62 can continuously wipe the inner wall of the drying cylinder 11 to prevent water droplets from forming and dripping into the separation ring 34 to contact the medicines and affect the drying of the medicines.

[0033] like Figure 5As shown, an annular elastic plate 70 is fixedly installed on the innermost separation ring 34, and the annular elastic plate 70 cooperates with the toggle plate 57; during the reciprocating motion of the toggle plate 57, each time the toggle plate 57 contacts the annular elastic plate 70, the toggle plate 57 will cause the annular elastic plate 70 to deform, and quickly recover after the toggle plate 57 moves away from the annular elastic plate 70. When the annular elastic plate 70 recovers quickly, the separation ring 34 can vibrate, causing the medicine stuck in the separation hole to fall off, thereby avoiding clogging of the separation hole and affecting the medicine separation effect.

[0034] Working principle: When the present invention dries the drug particles, the driving motor 22 is controlled to drive the driving gear 23 to rotate, and the driving gear 23 cooperates with the driven gear 26 to drive the rotating ring 24 and the drying cylinder 11 to rotate, so that the drying cylinder 11 is inclined and the opening is located at a high point, and the drug is poured into the innermost separation ring 34 of the drying cylinder 11, and then the second fixing plate 35 is rotated to make it move along the thread groove 36 on the mounting rod 31 until it contacts the separation ring 34, and then the cylinder cover 15 is installed, and the driving motor 22 is controlled to drive the drying cylinder 11 to reset, and the vacuum pump 12 is started to extract the air in the drying cylinder 11, and the heating module 14 is started. The medicine in the drying cylinder 11 is heated and dried. At this time, the first motor 42 is controlled to operate in cooperation with the belt 43 to drive the mounting rod 31 to rotate. When the mounting rod 31 rotates, the separation ring 34 is driven to rotate in the drying cylinder 11. The medicine in the innermost separation ring 34 rolls. The medicine particles can continuously change their position and direction to achieve uniform heating. The separation holes can separate the medicine particles, which is convenient for classifying and processing the medicines. After drying is completed, the cylinder cover 15 and the second fixing plate 35 are removed, and the driving motor 22 is started again to rotate and tilt the drying cylinder 11. At this time, the opening of the drying cylinder 11 is at a low point, which is convenient for the unloading operation of the medicines. When the pharmaceutical particles are being dried, the output shaft of the second motor 52 is controlled to rotate and reel in the connecting rope 54. The connecting rope 54 drives the slider 58 to slide in the movable groove 53 and stretch the spring 55. When the slider 58 slides, it cooperates with the bearing 56 to drive the toggle plate 57 to move in the innermost separation ring 34. When the toggle plate 57 reaches the set position, the output shaft of the second motor 52 rotates in the opposite direction to release the binding of the connecting rope 54. At this time, the spring 55 drives the slider 58 to reset, so that the toggle plate 57 reciprocates in the separation ring 34 to toggle the pharmaceutical particles. When the mounting rod 31 drives the first fixed plate 32 to rotate, the positioning rod 61 is engaged with it. The spiral guide plate 62 is driven to rotate together. When the spiral guide plate 62 rotates, the moisture generated by drying inside the drying cylinder 11 is effectively guided and concentrated, ensuring the rapid discharge of moisture inside the dryer. The outer edge of the spiral guide plate 62 can continuously wipe the inner wall of the drying cylinder 11. During the reciprocating motion of the toggle plate 57, whenever the toggle plate 57 contacts the annular elastic plate 70, the toggle plate 57 will cause the annular elastic plate 70 to deform and quickly recover after the toggle plate 57 is away from the annular elastic plate 70. When the annular elastic plate 70 recovers quickly, the separation ring 34 can vibrate, causing the medicine stuck in the separation hole to fall off.

[0035] The above describes an embodiment of the present invention, but this embodiment is not limited to the above specific implementation methods. The above specific implementation methods are merely illustrative and not restrictive. Under the guidance of this embodiment, ordinary technicians in this field can also make many forms, all of which are protected by this embodiment.

Claims

1. A drug refining vacuum dryer, comprising a base (10), characterized in that: The base (10) is connected to a drying cylinder (11) via a rotating assembly (20); the drying cylinder (11) is provided with a cylinder cover (15); a vacuum pump (12) is fixedly mounted on the cylinder cover (15); one end of a connecting pipe (13) is connected to the vacuum pump (12); the other end of the connecting pipe (13) is fixedly connected to the cylinder cover (15); and a heating module (14) is fixedly mounted on the drying cylinder (11); A separation drying assembly (30) mounted on a drying cylinder (11), the separation drying assembly (30) comprising a first fixing plate (32) and a second fixing plate (35), the surfaces of the first fixing plate (32) and the second fixing plate (35) being provided with a plurality of placement grooves (33) whose diameters gradually increase from the inside to the outside, each placement groove (33) being provided with a separation ring (34) adapted to its size, the separation rings (34) being provided with separation holes, the apertures of the separation holes on the separation rings (34) decreasing from the inside to the outside, the separation rings (34) cooperating with the driving assembly (40) to rotate the medicines to make them uniform during the drying process, and medicines of different sizes are separated and classified during the drying process; The driving assembly (40) comprises a second mounting plate (41) fixedly mounted on the drying cylinder (11), a first motor (42) fixedly mounted on the second mounting plate (41), a belt (43) sleeved on the output shaft of the first motor (42), and the other side of the belt (43) sleeved on the mounting rod (31); A leveling assembly (50) is provided on the mounting rod (31), and a moving plate (57) included in the leveling assembly (50) is used to level the medicine in the inner separation ring (34); The leveling assembly (50) further comprises a movable groove (53) formed on the mounting rod (31), a slider (58) being slidably mounted in the movable groove (53), a bearing (56) being fixedly mounted on the slider (58), the toggle plate (57) being fixedly mounted on the bearing (56), a mounting box (51) being fixedly mounted on the mounting rod (31), a second motor (52) being fixedly mounted in the mounting box (51), one end of a connecting rope (54) being connected to an output shaft of the second motor (52), the other end of the connecting rope (54) being fixedly mounted on the slider (58), one end of a spring (55) being connected to the slider (58), the other end of the spring (55) being fixedly connected to an inner wall of the movable groove (53); The shifting plate (57) is fan-shaped and has a plurality of through grooves on its surface.

2. A drug refining vacuum dryer according to claim 1, characterized in that: The separation and drying assembly (30) further comprises a mounting rod (31) rotatably mounted on the drying cylinder (11) and driven by the driving assembly (40); the first fixing plate (32) is fixedly mounted on the mounting rod (31); a thread groove (36) is formed on the mounting rod (31); and the second fixing plate (35) is threadably mounted on the mounting rod (31) via the thread groove (36).

3. A drug refining vacuum dryer according to claim 2, characterized in that: The rotating assembly (20) comprises a rotating ring (24) rotatably mounted on a base (10); an inner ring (25) is detachably mounted on the rotating ring (24); the drying cylinder (11) is fixedly connected to the inner ring (25); a first mounting plate (21) is fixedly mounted on the base (10); a driving motor (22) is fixedly mounted on the first mounting plate (21); a driving tooth (23) is fixedly mounted on an output end of the driving motor (22); and a driven tooth (26) cooperating with the driving tooth (23) is fixedly mounted on the rotating ring (24).

4. A drug refining vacuum dryer according to claim 3, characterized in that: The first mounting plate (21) is provided with a flow guide assembly (60), the flow guide assembly (60) comprising a positioning rod (61) fixedly mounted on the first mounting plate (21), and a spiral guide plate (62) fixedly mounted on the positioning rod (61).

5. A drug refining vacuum dryer according to claim 4, characterized in that: The outer edge portion of the spiral guide plate (62) contacts the inner wall of the drying cylinder (11).

6. A drug refining vacuum dryer according to claim 5, characterized in that: An annular elastic plate (70) is fixedly mounted on the innermost separation ring (34), and the annular elastic plate (70) cooperates with the toggle plate (57).

Images