Efficient circulating drying device for medicine raw materials

Abstract

The invention relates to the technical field of medicine production, and discloses an efficient circulating drying device for medicine raw materials, which comprises a drying oven, a moving frame, a tray and a sliding assembly, the moving frame is mounted in the drying oven, the tray is mounted in the moving frame, and the sliding assembly is arranged in the drying oven. The sliding assembly comprises an electric driving fluted disc which is driven to be installed in the drying oven, lead screws are rotationally connected to the surface of the moving frame in a linear array distribution mode, and gear rings are fixedly connected to the middles of the outer walls of the lead screws in an annular array distribution mode. The first sliding plate drives the partition plate to transversely slide in the tray, so that the medicinal materials put into the tray can be flatly spread, the height of the stacked medicinal materials is reduced in the process that the medicinal materials are spread by the partition plate, and the problem that the medicinal materials are scattered when the moving frame moves is avoided; and the situation that the medicinal materials are stacked in the tray and are difficult to evenly heat is avoided, and the dryness consistency of the dried medicinal materials is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of drug production, and specifically relates to a high-efficiency circulating drying device for drug raw materials. Background Art

[0002] In the process of drug production, the drying of drug raw materials is a crucial link, and its drying effect directly affects the quality and performance of drugs.

[0003] In terms of the placement of raw materials and the uniformity of drying, traditional drying devices usually directly place the medicinal materials in trays, and then stack the trays in the drying equipment. This method results in a relatively large stacking thickness of the medicinal materials in the trays. During the drying process, the upper-layer medicinal materials are easily heated, while the lower-layer medicinal materials are difficult to be fully reached by the hot air, resulting in uneven heating, which causes inconsistent dryness, affects the quality of drug raw materials and subsequent processing and use, and affects the drug quality.

[0004] During the operation of existing drying equipment, the flow of the internal hot air will impact the moving rack for placing the medicinal materials, causing the moving rack to shake or even shift. This not only affects the drying effect, but may also cause equipment failures due to the instability of the moving rack, posing potential safety hazards.

[0005] Therefore, a high-efficiency circulating drying device for drug raw materials is proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide a high-efficiency circulating drying device for drug raw materials to solve the problems raised in the above background art.

[0007] To achieve the above purpose, the present invention provides the following technical solution: A high-efficiency circulating drying device for drug raw materials, including an oven, a moving rack, trays, and a sliding component. The moving rack is installed inside the oven, the trays are installed inside the moving rack, the sliding component is arranged inside the oven. The sliding component includes an electrically driven gear disc driven and installed inside the oven. The surface of the moving rack is rotationally connected with lead screws in a linear array. The outer wall of the lead screw is fixedly connected with toothed rings in a circular array in the middle. A first transmission belt is connected between the toothed rings in a transmission manner. The outer wall of the lead screw is fixedly connected with gears near the toothed rings. The gears are meshed with the electrically driven gear disc. The outer wall of the lead screw is slidably connected with a first sliding plate. Inside the moving rack, first sliding rods are fixedly connected in a linear array. The side of the first sliding plate away from the lead screw is slidably connected to the outer wall of the first sliding rod. Guide plates are fixedly connected to the lower sides of the outer walls of the first sliding rods. Second sliding plates are slidably connected inside the first sliding plates. Struts are fixedly connected to the tops of the second sliding plates. First springs are fixedly connected between the tops of the struts and the second sliding plates. The tops of the struts are in contact with the lower surfaces of the first sliding rods. Partition plates are fixedly connected to the lower surfaces of the second sliding plates in a linear array.

[0008] Preferably, the guiding plate is trapezoidal inverted on the lower surface of the first sliding rod. The height of the guiding plate is equal to the depth of the tray. The lower surface of the partition plate fits with the upper surface of the tray. Both sides of the partition plate are chamfered. The bottom of the moving frame is provided with rollers. A chute is arranged at the bottom of the inner cavity of the oven, and the rollers are limited inside the chute.

[0009] Preferably, a heat conduction component is arranged inside the first sliding plate. The heat conduction component includes a toothed plate fixedly connected to the inner wall of the moving frame in a linear array distribution. The top of the inner cavity of the first sliding plate is rotatably connected with toothed shafts in a linear array distribution. A second transmission belt is connected in transmission between the outer walls of the toothed shafts. The outer walls of the toothed shafts and inside the first sliding plate are fixedly connected with fan blades. The second sliding plate and the partition plate are provided with communicating air guide holes.

[0010] Preferably, when the fan blades rotate, the wind direction is vertically downward. The outer wall of the second sliding plate fits tightly with the inner wall of the first sliding plate to form an independent space, and the independent space communicates with the outside through the air guide holes.

[0011] Preferably, the outer wall of the oven is symmetrically rotatably connected with hatch doors. A hot air blower is installed on the side wall of the oven. A stabilizing component is arranged inside the oven. The stabilizing component includes a second sliding rod slidably connected to the bottom of the oven. One end of the second sliding rod located inside the oven is fixedly connected with a second spring. An air collecting chamber is opened at the bottom of the oven. The side of the second spring away from the second sliding rod is fixedly connected to the inner wall of the oven. The inner wall of the oven is symmetrically fixedly connected with limiting sleeves. Magnets are slidably connected inside the limiting sleeves. The outer walls of the magnets fit tightly with the inner walls of the limiting sleeves. A third spring is fixedly connected between the side of the magnet close to the inner wall of the oven and the inner wall of the oven. An air guide groove is fixedly communicated between the inner cavity of the limiting sleeve and the air collecting chamber. Magnets are symmetrically fixedly connected to the outer wall of the moving frame.

[0012] Preferably, the magnet and the limiting sleeve are made of neodymium iron boron permanent magnet materials and have opposite magnetic poles. The diameter of the second spring is twice that of the third spring. When the hatch door is closed, one end of the second sliding rod close to the hatch door fits with the inner wall of the hatch door. The second spring is in an elastically contracted state when the hatch door is closed. The depth of the inner cavity of the limiting sleeve is twice the length of the magnet.

[0013] Preferably, a slider sliding inside the thread groove of the lead screw is arranged on the inner wall of the first sliding plate.

[0014] Preferably, when the support rod fits against the bottom of the guiding plate, the partition plate fits with the bottom of the inner cavity of the tray.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. The first slide plate drives the partition to slide horizontally inside the tray, so that the medicinal materials placed inside the tray can be spread evenly. In the process of spreading the medicinal materials on the partition plate, the height of the stacked medicinal materials is reduced, avoiding the problem of the medicinal materials scattering when the mobile rack moves. By reducing the thickness of the medicinal materials stacked on the tray, it is avoided that the medicinal materials are stacked inside the tray and difficult to be heated evenly, and the consistency of the dryness of the medicinal materials after drying is improved; 2. When the first slide plate moves horizontally inside the mobile rack, hot air is blown to the bottom of the tray through the air guide hole, so that the medicinal materials deposited at the bottom of the tray can also be dried by the hot air, thereby effectively avoiding the problem that water evaporates and deposits at the bottom of the tray, making it difficult to dry the medicinal materials at the bottom of the tray. The air guide hole blows between the medicinal materials, which can effectively ensure the drying level of the medicinal materials at different depths, so that the heat is evenly distributed inside the equipment, and the drying efficiency is improved; 3. Through the magnetic adsorption of the magnetic block and the magnetic plate, the mobile rack as a whole can maintain a stable state during the drying of medicinal materials inside the oven, avoiding the shaking of the mobile rack caused by the hot air blowing. When the magnetic block shrinks, the limit sleeve contacts the outer wall of the mobile rack, so that the staff can easily slide the mobile rack out of the oven after the door is flipped open, realizing the function of locking the position of the mobile rack after the door is closed and making the position of the mobile rack movable after the door is opened. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the oven of the present invention; Figure 3 It is a partial cross-sectional schematic diagram of the oven structure of the present invention; Figure 4 It is an overall schematic diagram of the mobile frame structure of the present invention; Figure 5 It is a partial cross-sectional schematic diagram of the mobile frame structure of the present invention; Figure 6 It is a partial schematic diagram of the sliding assembly structure of the present invention; Figure 7 For the present invention Figure 6 A schematic diagram of the structure enlargement in the middle; Figure 8 It is a schematic cross-sectional view of the overall structure of the present invention.

[0017] In the figure: 1. Oven; 2. Door; 3. Hot air blower; 4. Mobile rack; 5. Tray; 6. Sliding assembly; 7. Heat conduction assembly; 8. Stabilizing assembly; 61. Electric drive gear disc; 62. Lead screw; 63. Tooth ring; 64. Gear; 65. First drive belt; 66. First slide plate; 67. First slide bar; 68. Guide plate; 69. Second slide plate; 610. Support rod; 611. First spring; 612. Partition board; 71. Tooth plate; 72. Tooth shaft; 73. Second drive belt; 74. Fan blade; 75. Air guide hole; 81. Second slide bar; 82. Second spring; 83. Air collection chamber; 84. Air guide groove; 85. Limit sleeve; 86. Magnet; 87. Third spring; 88. Magnet plate. Specific embodiments

[0018] 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 of 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.

[0019] Embodiments of the present invention Please refer to Figures 1 to 8 , a high-efficiency circulating drying device for pharmaceutical raw materials, including an oven 1, a moving frame 4, a tray 5 and a sliding assembly 6. The moving frame 4 is installed inside the oven 1, the tray 5 is installed inside the moving frame 4, the sliding assembly 6 is arranged inside the oven 1, and the sliding assembly 6 includes an electric drive gear disc 61 driven and installed inside the oven 1. The surface of the moving frame 4 is rotatably connected with lead screws 62 in a linear array distribution. The middle part of the outer wall of the lead screw 62 is fixedly connected with tooth rings 63 in an annular array distribution. A first drive belt 65 is connected between the tooth rings 63. A gear 64 is fixedly connected to the outer wall of the lead screw 62 near the tooth ring 63. The gear 64 meshes with the electric drive gear disc 61. A first slide plate 66 is slidably connected to the outer wall of the lead screw 62. First slide bars 67 are fixedly connected to the inside of the moving frame 4 in a linear array distribution. The side of the first slide plate 66 away from the lead screw 62 is slidably connected to the outer wall of the first slide bar 67. Guide plates 68 are fixedly connected to the lower sides of the outer walls of the first slide bars 67. Second slide plates 69 are slidably connected to the inside of the first slide plates 66. Support rods 610 are fixedly connected to the tops of the second slide plates 69. First springs 611 are fixedly connected between the tops of the support rods 610 and the second slide plates 69. The tops of the support rods 610 are attached to the lower surface of the first slide bar 67. Partition boards 612 are fixedly connected to the lower surfaces of the second slide plates 69 in a linear array distribution.

[0020] The guide plate 68 is trapezoidal in reverse on the lower surface of the first sliding rod 67. The height of the guide plate 68 is equal to the depth of the tray 5. The lower surface of the partition plate 612 is fitted to the upper surface of the tray 5. Both sides of the partition plate 612 are chamfered. The bottom of the moving frame 4 is provided with rollers. A chute is provided at the bottom of the inner cavity of the oven 1. The rollers are limited inside the chute.

[0021] A slider that slides inside the thread groove of the lead screw 62 is provided on the inner wall of the first sliding plate 66.

[0022] When the support rod 610 is fitted to the bottom of the guide plate 68, the partition plate 612 is fitted to the bottom of the inner cavity of the tray 5.

[0023] In the actual application of the embodiment of the present invention, the staff puts the medicinal materials into the inside of the tray 5. After the placement is completed, the tray 5 is pushed into the inside of the moving frame 4. When the tray 5 is successively received into the inside of the moving frame 4, the staff pushes the moving frame 4 into the inner cavity of the oven 1. When the moving frame 4 is pushed into the inside of the oven 1, the electric drive gear disk 61 in the inner cavity of the oven 1 will mesh with the gear 64 on the moving frame 4. Subsequently, the staff closes the hatch 2 and starts the hot air blower 3. The hot air blower 3 will inhale the outside air and heat it and send it to the inside of the oven 1. Subsequently, the staff starts the equipment to make the electric drive gear disk 61 start to rotate. The rotation of the electric drive gear disk 61 drives the meshed gear 64 to rotate together. During the rotation of the gear 64, it drives a plurality of lead screws 62 to rotate on the outer wall of the moving frame 4 through the transmission of the toothed ring 63 and the first transmission belt 65. During the rotation of the lead screw 62, the slider on the inner wall of the tooth shaft 72 will slide inside the thread groove of the lead screw 62, so that the first sliding plate 66 slides horizontally inside the moving frame 4. When the first sliding plate 66 slides horizontally, it will be limited by the first sliding rod 67 at the same time, so that the first sliding plate 66 is in a horizontal sliding state. When the first sliding plate 66 slides to the position of the guide plate 68, the guide plate 68 exerts a downward extrusion on the support rod 610, so that the second sliding plate 69 and the partition plate 612 slide into the inside of the tray 5 together. The first spring 611 is elastically contracted under extrusion. As the partition plate 612 extends out of the first sliding plate 66, the first sliding plate 66 drives the partition plate 612 to slide horizontally inside the tray 5, so that the medicinal materials placed inside the tray 5 can be paved flat. When the medicinal materials are paved by the partition plate 612, the height of the stacked medicinal materials is reduced, avoiding the problem of the medicinal materials falling when the moving frame 4 moves. By reducing the stacking thickness of the medicinal materials on the tray 5, it is avoided that the medicinal materials are stacked inside the tray 5 and it is difficult to be uniformly heated, improving the consistency of the dryness of the medicinal materials after drying.

[0024] A heat-conducting component 7 is provided inside the first slide plate 66, and the heat-conducting component 7 includes tooth plates 71 distributed in a linear array and fixedly connected to the inner wall of the movable frame 4. The top of the inner cavity of the first slide plate 66 is rotatably connected with a gear shaft 72 distributed in a linear array. A second transmission belt 73 is transmission-connected between the outer walls of the gear shaft 72. Fan blades 74 are fixedly connected to the outer walls of the gear shaft 72 and located inside the first slide plate 66. The second slide plate 69 and the partition plate 612 are provided with interconnected air guide holes 75.

[0025] When the fan blades 74 rotate, the wind direction is vertically downward, and the outer wall of the second slide plate 69 is tightly fitted with the inner wall of the first slide plate 66 to form an independent space, and the independent space is connected to the outside through the air guide hole 75.

[0026] When the embodiment of the present invention is actually used, during the lateral movement of the first slide 66 inside the movable frame 4, the gear shaft 72 will move laterally together with the first slide 66, and the gear shaft 72 will mesh with the tooth plate 71 and rotate during the lateral movement. During the rotation, the gear shaft 72 drives multiple gear shafts 72 to rotate together through the second transmission belt 73. At this time, because the airflow direction is vertically downward when the fan blades 74 rotate, the gear shaft 72 will pump the air inside the oven 1 into the inner cavity of the first slide 66 through the fan blades 74 when rotating. The air in the inner cavity of the first slide 66 increases and the air pressure rises, so that the air in the inner cavity is discharged to the bottom of the tray 5 through the air guide holes 75.

[0027] When the first slide plate 66 moves horizontally inside the movable frame 4, hot air is blown toward the bottom of the tray 5 through the air guide holes 75, so that the medicinal materials deposited at the bottom of the tray 5 can also be dried by the hot air, thereby effectively avoiding the problem that water evaporates and deposits at the bottom of the tray 5, which makes it difficult to dry the medicinal materials at the bottom of the tray 5. The air guide holes 75 are used to blow between the medicinal materials, so that the drying level of the medicinal materials at different depths can be effectively guaranteed, so that the heat is evenly distributed inside the equipment, thereby improving the drying efficiency.

[0028] The outer wall of the oven 1 is symmetrically rotatably connected with the hatch 2, and a hot air blower 3 is installed on the side wall of the oven 1. A stabilizing component 8 is arranged inside the oven 1, and the stabilizing component 8 includes a second sliding rod 81 slidably connected to the bottom of the oven 1, and the second sliding rod 81 is fixedly connected to a second spring 82 at one end inside the oven 1. An air collecting cabin 83 is provided at the bottom of the oven 1, and the side of the second spring 82 away from the second sliding rod 81 is fixedly connected to the inner wall of the oven 1, and the inner wall of the oven 1 is symmetrically fixedly connected with a limiting sleeve 85, and the inside of the limiting sleeve 85 is slidably connected with a magnetic block 86, and the outer wall of the magnetic block 86 is tightly fitted with the inner wall of the limiting sleeve 85, and a third spring 87 is fixedly connected between the side of the magnetic block 86 close to the inner wall of the oven 1 and the inner wall of the oven 1, and an air guide groove 84 is fixedly connected between the inner cavity of the limiting sleeve 85 and the air collecting cabin 83, and a magnetic plate 88 is symmetrically fixedly connected to the outer wall of the movable frame 4.

[0029] The magnetic plate 88 and the limiting sleeve 85 are made of neodymium iron boron permanent magnet material and have opposite magnetic poles. The diameter of the second spring 82 is twice that of the third spring 87. When the cabin door 2 is closed, the end of the second slide bar 81 close to the cabin door 2 is in contact with the inner wall of the cabin door 2. The second spring 82 is in an elastically contracted state when the cabin door 2 is closed. The inner cavity depth of the limiting sleeve 85 is twice the length of the magnetic block 86.

[0030] When the embodiment of the present invention is actually used, after the medicinal materials are loaded, the staff pushes the movable rack 4 into the interior of the oven 1, and then flips and closes the hatch 2. When the hatch 2 is closed, the second slide bar 81 will be squeezed, causing the second slide bar 81 to slide toward the position of the air collecting chamber 83. During the sliding process, the second slide bar 81 will transport the air inside the air collecting chamber 83 to the interior of the limiting sleeve 85 through the air guide groove 84. The air pressure inside the limiting sleeve 85 increases, causing the magnetic block 86 to slide outward from the inside of the limiting sleeve 85. At this time, because the magnetic poles of the magnetic block 86 and the magnetic plate 88 are opposite and magnetically attracted to each other, the magnetic plate 88 will be tightly adsorbed with the magnetic block 86. At this time, because the magnetic block 86 is limited by the limiting sleeve 85, the movable rack 4 will remain in a stable state after the hatch 2 is closed due to the magnetic adsorption of the magnetic block 86 and the magnetic plate 88, thereby reducing the problem of deviation caused by the blowing of drying hot air.

[0031] When the medicinal materials are dried, the staff flips open the hatch 2. At this time, the second slide bar 81 is no longer squeezed, and the second spring 82 elastically stretches and causes the second slide bar 81 to pop out of the oven 1. The inner cavity space of the air collecting chamber 83 increases and air is drawn into the inner cavity of the limiting sleeve 85 through the air guide groove 84, causing the magnetic block 86 to slide toward the inside of the limiting sleeve 85. When the limiting sleeve 85 slides and drives the movable rack 4 to slide until its side wall collides with the outer wall of the limiting sleeve 85, the movable rack 4 and the magnetic plate 88 cannot continue to move. The continued sliding of the magnetic block 86 will increase the distance between the magnetic block 86 and the magnetic plate 88, causing the magnetic adsorption state to be released. At this time, the staff can pull the movable rack 4 out of the oven 1 without being affected by the magnetic attraction of the magnetic block 86 and the magnetic plate 88.

[0032] Through the magnetic adsorption of the magnetic block 86 and the magnetic plate 88, the movable rack 4 as a whole can maintain a stable state during the process of drying medicinal materials inside the oven 1, avoiding the shaking of the movable rack 4 caused by the hot air blowing, and the resistance of the limiting sleeve 85 to the outer wall of the movable rack 4 when the magnetic block 86 contracts, the staff can easily slide the movable rack 4 out of the oven 1 after the cabin door 2 is flipped open, thereby realizing the function of locking the position of the movable rack 4 after the cabin door 2 is closed and making the position of the movable rack 4 movable after the cabin door 2 is opened.

[0033] It should be noted that, in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An efficient circulating drying device for pharmaceutical raw materials, comprising an oven (1), a moving frame (4), a tray (5) and a sliding assembly (6), characterized in that: The moving frame (4) is installed inside the oven (1), the tray (5) is installed inside the moving frame (4), the sliding assembly (6) is arranged inside the oven (1), the sliding assembly (6) includes an electric drive gear disk (61) driven and installed inside the oven (1), the surface of the moving frame (4) is rotationally connected with lead screws (62) in a linear array distribution, annular gears (63) are fixedly connected to the middle of the outer walls of the lead screws (62) in an annular array distribution, a first transmission belt (65) is drivingly connected between the annular gears (63), gears (64) are fixedly connected to one side of the outer walls of the lead screws (62) close to the annular gears (63), the gears (64) are meshed with the electric drive gear disk (61), a first sliding plate (66) is slidably connected to the outer walls of the lead screws (62), first sliding rods (67) are fixedly connected to the inside of the moving frame (4) in a linear array distribution, the side of the first sliding plate (66) away from the lead screw (62) is slidably connected to the outer walls of the first sliding rods (67), guide plates (68) are fixedly connected to the lower sides of the outer walls of the first sliding rods (67), and second sliding plates (69) are slidably connected to the inside of the first sliding plates (66).

2. The high-efficiency circulating drying device for pharmaceutical raw materials according to claim 1, characterized in that: Supporter rods (610) are fixedly connected to the tops of the second sliding plates (69), first springs (611) are fixedly connected between the tops of the supporter rods (610) and the second sliding plates (69), the tops of the supporter rods (610) are in contact with the lower surfaces of the first sliding rods (67), partition plates (612) are fixedly connected to the lower surfaces of the second sliding plates (69) in a linear array distribution, the guide plates (68) are trapezoidal in reverse on the lower surfaces of the first sliding rods (67), the height of the guide plates (68) is equal to the depth of the tray (5), the lower surfaces of the partition plates (612) are in contact with the upper surfaces of the tray (5), both sides of the partition plates (612) are chamfered, rollers are arranged at the bottom of the moving frame (4), and chutes are arranged at the bottom of the inner cavity of the oven (1), and the rollers are limited inside the chutes.

3. The high-efficiency circulating drying device for pharmaceutical raw materials according to claim 2, wherein: A heat conduction assembly (7) is arranged inside the first sliding plate (66), the heat conduction assembly (7) includes toothed plates (71) fixedly connected to the inner walls of the moving frame (4) in a linear array distribution, toothed shafts (72) are rotationally connected to the tops of the inner cavities of the first sliding plates (66) in a linear array distribution, a second transmission belt (73) is drivingly connected between the outer walls of the toothed shafts (72), fan blades (74) are fixedly connected to the outer walls of the toothed shafts (72) and located inside the first sliding plates (66), and air guide holes (75) are formed in the second sliding plates (69) and the partition plates (612) in a communicating manner.

4. The high-efficiency circulating drying device for pharmaceutical raw materials according to claim 3, wherein: When the fan blades (74) rotate, the wind direction is vertically downward, the outer walls of the second sliding plates (69) are closely attached to the inner walls of the first sliding plates (66) to form an independent space, and the independent space communicates with the outside through the air guide holes (75).

5. The high-efficiency circulating drying device for pharmaceutical raw materials according to claim 1, characterized in that: The outer wall of the oven (1) is symmetrically and rotatably connected with a hatch (2). A hot air blower (3) is installed on the side wall of the oven (1). A stabilizing assembly (8) is arranged inside the oven (1). The stabilizing assembly (8) includes a second sliding rod (81) slidably connected to the bottom of the oven (1). One end of the second sliding rod (81) inside the oven (1) is fixedly connected with a second spring (82). An air collecting chamber (83) is formed in the bottom of the oven (1). The side of the second spring (82) away from the second sliding rod (81) is fixedly connected to the inner wall of the oven (1). The inner wall of the oven (1) is symmetrically and fixedly connected with limiting sleeves (85). Magnets (86) are slidably connected inside the limiting sleeves (85). The outer wall of the magnet (86) is in close fit with the inner wall of the limiting sleeve (85). A third spring (87) is fixedly connected between the side of the magnet (86) close to the inner wall of the oven (1) and the inner wall of the oven (1). An air guiding groove (84) is fixedly communicated between the inner cavity of the limiting sleeve (85) and the air collecting chamber (83). Magnet plates (88) are symmetrically and fixedly connected to the outer wall of the moving frame (4).

6. The high-efficiency circulating drying device for pharmaceutical raw materials according to claim 5, wherein: The magnet plates (88) and the limiting sleeves (85) are made of neodymium iron boron permanent magnet materials and have opposite magnetic poles. The diameter of the second spring (82) is twice that of the third spring (87). When the hatch (2) is closed, one end of the second sliding rod (81) close to the hatch (2) is in contact with the inner wall of the hatch (2). The second spring (82) is in an elastically contracted state when the hatch (2) is closed. The depth of the inner cavity of the limiting sleeve (85) is twice the length of the magnet (86).

7. The high-efficiency circulating drying device for pharmaceutical raw materials according to claim 1, wherein: The inner wall of the first sliding plate (66) is provided with sliders sliding inside the thread grooves of the lead screw (62).

8. The high-efficiency circulating drying device for pharmaceutical raw materials according to claim 2, characterized in that: When the support rod (610) is in contact with the bottom of the guiding plate (68), the partition plate (612) is in contact with the bottom of the inner cavity of the tray (5).

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