Vacuum drying device for straight powder of colquhoumia roots

Abstract

The invention relates to the technical field of processing and preparation of pyracantha formosana, and particularly discloses a vacuum drying device for straight pyracantha formosana root powder, which comprises a tank body internally provided with a drying cavity, the top of the tank body is provided with a feed port, and the bottom of the tank body is provided with a discharge port; the two ends of the main shaft are rotationally connected with the tank body, a stirring unit is arranged in the middle of the main shaft, the stirring unit comprises a rotating shaft distributed in the radial direction of the main shaft and stirring plates, the stirring plates are multiple folding hollow plates and can be driven by the rotating shaft to stretch or retract in the telescopic direction of the stirring plates, the main shaft and the rotating shaft are hollow, and a plurality of second air suction holes are further formed in the rotating shaft; the second suction hole is communicated with the cavity in the rotating shaft; the motor is located at the top of the tank and used for driving the spindle to rotate. The vacuum drying device can improve the vacuum drying efficiency and effect of the colquhoumia root powder.

Description

Technical Field

[0001] The invention relates to the technical field of torch flower processing and preparation, and in particular to a vacuum drying device for torch flower root direct powder. Background Art

[0003] Torch flower root tablets are mainly used clinically for rheumatoid arthritis, rheumatic arthritis, lupus erythematosus, immune kidney disease, skin diseases, tumors, etc. Modern pharmacological research believes that it has anti-inflammatory and anti-immunosuppressive effects.

[0004] At present, the production of torch flower root tablets often adopts traditional preparation molding technology, which is to add suitable solvents to the torch flower root raw materials for extraction, alcohol precipitation, and concentration into an extract, and then add suitable auxiliary materials to make granules, dry, and tablet. The process flow is roughly as follows: crushing → drying → extraction → concentration → alcohol precipitation → standing filtration → concentration and paste collection → granulation → total mixing → tablet pressing → packaging; during the process, the torch flower root powder needs to be placed in a vacuum dryer for vacuum drying.

[0005] In the prior art, a Chinese patent document with authorization announcement number CN116678197B discloses an energy-saving and environmentally friendly spiral disc vacuum drying device, which relates to the field of drying technology. The vacuum drying device includes a drying box, a hollow shaft is installed inside the drying box, a lower hopper, a spiral plate and a disc are installed on the hollow shaft, a driving motor and a connecting ring are installed at one end of the hollow shaft located outside the drying box, the connecting ring is connected to the inner space of the hollow shaft, high-temperature and high-pressure steam is infused into the hollow shaft, and condensed water is discharged from the hollow shaft, the spiral plate and the disc are both connected to the inner space of the hollow shaft, the high-temperature and high-pressure steam flows through the spiral plate and the disc, and the material on the spiral plate and the disc is heated at high temperature to evaporate the water in the material, a feed pipe and a vacuum tube are installed above the drying box, one end of the vacuum tube is connected to a separator, the separator is connected to a fan, and the separator separates the water and impurities in the gas to prevent the gas from entering the outside atmosphere and polluting the environment.

[0006] When the above vacuum dryer is drying materials, the materials will accumulate inside the dryer. The accumulation of materials will cause the moisture in the materials to be undischarged in time, resulting in slow drying. In addition, during the drying process, overly moist materials will clump, and the moist agglomerated materials will dry slowly, resulting in problems such as inconsistent drying degree and low drying efficiency. Summary of the invention

[0008] In view of this, the present invention provides a vacuum drying device for direct powder of torch flower root to improve the vacuum drying efficiency of torch flower root.

[0009] In order to achieve the above-mentioned purpose, the basic scheme of the present invention provides a vacuum drying device for direct powder of torch flower root, comprising: The tank body has a drying chamber inside, a feed inlet at the top of the tank body, and a discharge outlet at the bottom of the tank body; The main shaft is rotatably connected to the tank body at both ends, and a stirring unit is provided in the middle. The stirring unit includes a rotating shaft and a stirring plate distributed radially along the main shaft. The stirring plate is a multi-piece foldable hollow plate and can be extended or contracted along its telescopic direction under the drive of the rotating shaft. The main shaft and the rotating shaft are both hollow. The rotating shaft is also provided with a plurality of second air suction holes, which are connected to the internal cavity of the rotating shaft; The motor is located on the top of the tank and is used to drive the main shaft to rotate.

[0010] In a possible design, the rotating shaft is arranged radially along the main shaft, one end of the rotating shaft is rotatably connected to the main shaft and the cavities of the two are connected, the other end of the rotating shaft is fixed with a third gear, a gear ring is fixed on the inner wall of the drying chamber, the third gear is meshed with the gear ring, a groove wheel is fixed in the middle of the rotating shaft, the axial direction of the groove wheel is consistent with the rotating shaft, and a closed annular groove is provided on the groove wheel. The stirring unit also includes a driven frame, the upper end of the driven frame is two vertical rods distributed on both sides of the groove wheel, the vertical rods are provided with pins inserted into the grooves, and a corresponding pin is provided on the stirring plate, and the lower end of the driven frame is provided with a horizontal plate fixed to the vertical rod, and a strip groove is provided on the horizontal plate. The pin extends into the strip groove and can drive the stirring plate to contract or extend under the drive of the driven frame.

[0011] In a possible design, a discharge pipe and a valve for controlling the discharge of materials are also installed at the discharge port.

[0012] In a possible design, the stirring units are provided in three groups and are evenly distributed around the axis of the main shaft.

[0013] In a possible design, power transmission is achieved between the motor output shaft and the main shaft via bevel gears.

[0014] In a possible design, a plurality of material passing holes are provided on the plate surface of the stirring plate.

[0015] In a possible design, the width of the feed strip hole can be set to 5mm-20mm.

[0016] In a possible design, the length direction of the strip groove is perpendicular to the axial direction of the groove wheel.

[0017] In a possible design, a surrounding plate is provided on the inner wall of the drying chamber, and the surrounding plate and the inner wall of the drying chamber form an air intake cavity. A plurality of third air intake holes connected to the air intake cavity are provided on the surrounding plate, and an air intake pipe penetrating the inner wall of the drying chamber and extending to the outside is also provided at the air intake cavity.

[0018] In a possible design, the distance between the stirring plate and the bottom surface of the drying chamber is set to 5 mm-20 mm.

[0019] Compared with the prior art, the principles and effects of the present invention are as follows: (1) The stirring plate can rotate around the main shaft axis to stir the torch flower root powder in the drying chamber, avoid agglomeration, increase the contact probability of the torch flower root powder with the first air intake hole, the second air intake hole, etc., and also drive the torch flower root powder to centrifugal dehydration. When the shaft rotates under the drive of the main shaft, the third gear rotates around the gear ring under the drive of the shaft, and the third gear also rotates around its own axis, and then drives the stirring plate to rotate around the main shaft axis through the groove wheel, and stretches or contracts along its expansion direction. It can not only change the stirring area of ​​the stirring plate, but more importantly, it can generate clamping force, so that the agglomerated or agglomerated torch flower root powder can be broken apart, and it can also squeeze the torch flower root powder, so that the drying of the entire torch flower root powder is more thorough, the drying effect is more consistent, and the drying efficiency is higher. After the vacuum drying is completed, the torch flower root powder can be discharged from the discharge port.

[0020] (2) The setting of the stirring unit adds a new stirring dimension, achieving efficient stirring without dead angles in the entire tank, and improving the vacuum drying efficiency and effect of the torch flower root powder.

[0021] (3) It is particularly important to note that the main shaft, rotating shaft, stirring plate, etc. are not isolated, but are interconnected and work together. This multi-pronged approach not only fully realizes the vacuum drying efficiency of the torch flower root powder, but also greatly improves the vacuum drying effect of the torch flower root powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 A three-dimensional diagram of a vacuum drying device for direct powder of torch flower root proposed in an embodiment of the present application is shown; Figure 2 A top view of a vacuum drying device for direct powder of torch flower root proposed in an embodiment of the present application is shown; Figure 3 Shows Figure 2 AA section view; Figure 4 Shows Figure 1 BB section view; Figure 5A three-dimensional diagram of a stirring unit in a vacuum drying device for direct powder of torch flower root proposed in an embodiment of the present application is shown; Figure 6 Shows Figure 5 Front view of Figure 7 Shows Figure 5 A top view of Figure 8 Shows Figure 5 Bottom view of . DETAILED DESCRIPTION

[0026] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0027] Description of reference numerals: Tank body 1, support leg 2, discharge pipe 3, main shaft 4, second bevel gear 5, first bevel gear 6, suction pipe 7, enclosure 8, stirring plate 9, folding part 10, discharge port 12, motor 13, material passing strip hole 14, first suction hole 15, gear ring 16, third gear 17, groove wheel 18, driven frame 19, bayonet pin 20, upper fixing sleeve 21, groove 22, second suction hole 23, lower fixing sleeve 24, rotating shaft 25, strip groove 26.

[0028] like Figure 1-8 As shown, an embodiment of the present invention discloses a vacuum drying device for torch flower root direct powder, comprising a tank body 1, a drying chamber is arranged in the tank body 1, and a support leg 2 is arranged at the bottom of the tank body 1. The support leg 2 is provided with three legs, and the support leg 2 can support the tank body 1, thereby realizing the installation and fixation of the entire vacuum drying device, and facilitating the installation of external pipelines of the tank body 1.

[0029] A discharge port 12 is provided at the bottom of the drying chamber, and a discharge pipe 3 and a valve for controlling the discharge of materials are also installed at the discharge port 12, so as to facilitate the discharge of the torch flower root powder from the drying chamber after drying; a feed port is provided at the top of the drying chamber, and the feed port can be connected to an external material delivery pipeline to facilitate the torch flower root powder to be dried to enter the drying chamber, and a detachable dust cover is provided at the feed port to facilitate keeping the feed port closed during the drying process.

[0030] A hollow main shaft 4 is also rotatably arranged in the drying chamber, the upper end of the main shaft 4 extends out of the tank body 1 and is rotatably connected to the tank body 1 through an upper fixed sleeve 21, a motor 13 is installed on the top of the tank body 1, and power transmission is achieved between the output shaft of the motor 13 and the main shaft 4 through a bevel gear. Specifically, a first bevel gear 6 is arranged on the output shaft of the motor 13, a second bevel gear 5 meshing with the first bevel gear 6 is arranged on the upper end of the main shaft 4, and a lower end of the main shaft 4 is rotatably connected to the tank body 1 through a lower fixed sleeve 24. The upper end of the main shaft 4 extends out of the tank body 1, and the end surface can be connected to an air suction mechanism such as a negative pressure pump through a rotating joint for vacuum drying.

[0031] The part of the main shaft 4 located in the drying chamber is provided with a stirring unit, preferably, as Figure 4-8 As shown, there are three groups of stirring units, which are evenly distributed around the axis of the main shaft 4.

[0032] like Figure 4-6 As shown, the stirring unit includes a rotating shaft 25 and a stirring plate 9 arranged from top to bottom, wherein the rotating shaft 25 is arranged radially along the main shaft 4, the main shaft 4 and the rotating shaft 25 are both hollow, one end of the rotating shaft 25 is rotatably connected to the main shaft 4 and the cavities of the two are communicated, and the other end of the rotating shaft 25 is fixed with a third gear 17, and a ring gear 16 is fixed on the inner wall of the drying chamber or the tank body 1, and the third gear 17 is meshed with the ring gear 16. When the rotating shaft 25 is driven by the main shaft 4 to rotate, the third gear 17 rotates around the ring gear 16 driven by the rotating shaft 25 (which can be regarded as the revolution of the third gear 17 with the axis of the main shaft 4 as the center), and the third gear 17 also rotates around its own axis (which can be regarded as the rotation of the third gear 17); a plurality of second air intake holes 23 are also provided on the rotating shaft 25, and the second air intake holes 23 are communicated with the internal cavity of the rotating shaft 25.

[0033] like Figure 5-6As shown, the stirring plate 9 is a multi-piece folding hollow plate, which is in a wave-folded shape as a whole and can be stretched or contracted along its telescopic direction under the action of external force. It can not only change the stirring area of ​​the stirring plate 9, but also, more importantly, generate a clamping force, so that the agglomerated or lumped torch flower root powder can be broken, and at the same time, it can also have an extrusion effect on the torch flower root powder, so that the drying of the entire torch flower root powder is more thorough, the drying effect is more consistent, and the drying efficiency and efficiency are higher. The fold of the stirring plate 9 can also be called a folding part 10, which can be reinforced by adding a rubber layer to avoid breaking. The rubber layer should be selected to meet the medical requirements and standards and replaced regularly to avoid aging. The stirring plate 9 is provided with a first suction hole 15 connected to the inner cavity of the stirring plate 9. The internal cavity of the stirring plate 9 is connected to the internal cavity of the main shaft 4, so that the main shaft 4 can vacuum absorb moisture and vacuum dry. In addition, during the working process, the stirring plate 9 can contact the torch flower root powder with a large working area, which not only has high vacuum drying efficiency but also good vacuum drying efficiency. Preferably, a plurality of feeding strip holes 14 are provided on the plate surface of the stirring plate 9, so that the stirring plate 9 can comb and stir the torch flower root powder in the drying chamber like a sledge plowing the land when working; and the width of the feeding strip holes 14 can be set to 5mm-20mm, which is smaller than the diameter of the agglomerated torch flower root powder (the approximate range can be obtained based on observation and statistics), so that the stirring plate 9 also has a certain filtering function; preferably, the feeding strip holes 14 on adjacent plate surfaces are staggered, so that the filtering function of the stirring plate 9 can be maximized, and at the same time, the crushing and extrusion ability of the entire stirring plate 9 on the agglomerated torch flower root powder can also be improved.

[0034] like Figure 5-8 As shown, a groove wheel 18 is fixed to the middle of the rotating shaft 25, and the axial direction of the groove wheel 18 is consistent with the rotating shaft 25. A closed annular groove 22 is provided on the groove wheel 18. The stirring unit also includes a driven frame 19. The upper end of the driven frame 19 is two vertical rods distributed on both sides of the groove wheel 18. The vertical rods are provided with pins inserted into the groove 22. This makes the vertical rods and the driven frame 19 reciprocate in the axial direction of the groove wheel 18 as the groove wheel 18 rotates. A corresponding pin 20 is provided on the stirring plate 9. The lower end of the driven frame 19 is provided with a horizontal plate fixed to the vertical rod, and a strip groove 26 is provided on the horizontal plate. Preferably, the length direction of the strip groove 26 is perpendicular to the axial direction of the groove wheel 18. The pin 20 extends into the strip groove 26 and can drive the stirring plate 9 to contract or extend under the drive of the driven frame 19.

[0035] Preferably, a panel 8 is provided on the inner wall of the drying chamber, and the panel 8 and the inner wall of the drying chamber form a circle of air intake cavity. The panel 8 is provided with a plurality of third air intake holes connected with the air intake cavity. The air intake cavity is also provided with an air intake pipe 7 that penetrates the inner wall of the drying chamber and extends to the outside. The vacuum drying function can be realized by an external suction mechanism such as a negative pressure fan. The air intake cavity can cooperate with the main shaft 4 for vacuum drying. When the stirring plate 9 acts on the torch flower root powder, there must be water vapor or moisture (in the form of water vapor or water vapor) diffused to the inner wall of the drying chamber under the action of centrifugation. The setting of the panel 8 can just enhance the absorption of this part of water vapor or moisture. The first air intake hole, the second air intake hole, and the third air intake hole are all provided with waterproof and breathable fabrics, which can prevent the drug powder from being sucked away, and at the same time facilitate the adsorption of water vapor.

[0036] Preferably, the distance between the stirring plate 9 and the bottom surface of the drying chamber is set to 5mm-20mm, which can not only ensure the normal operation of the stirring plate 9, but also facilitate the passage of normal torch flower root powder and block the agglomerated torch flower root powder.

[0037] During operation, the negative pressure fan and other air suction equipment are connected to the main shaft 4, the air suction pipe 7, etc. respectively. After the torch flower root powder is placed in the tank body 1, the tank body 1 is closed and the motor 13 is started. The motor 13 drives the main shaft 4 to rotate through the first bevel gear 6 and the second bevel gear 5. The stirring plate 9 can rotate around the axis of the main shaft 4 to stir the torch flower root powder in the drying chamber to prevent it from agglomerating and increase the contact probability of the torch flower root powder with the first air suction hole 15, the second air suction hole 23, etc. At the same time, it also has the function of driving the torch flower root powder to be centrifugally dehydrated. When the rotating shaft 25 is driven by the main shaft 4 to rotate, the third gear 17 is driven by the rotating shaft 25. While rotating around the gear ring 16, the third gear 17 will also rotate around its own axis, and then drive the stirring plate 9 through the groove wheel 18 to rotate around the axis of the main shaft 4 while extending or contracting along its telescopic direction, which can not only change the stirring area of ​​the stirring plate 9, but more importantly, it can generate clamping force, thereby breaking up the clumped or agglomerated torch flower root powder, and also have an extrusion effect on the torch flower root powder, so that the drying of the entire torch flower root powder is more thorough, the drying effect is more consistent, and the drying efficiency is higher. After the vacuum drying is completed, the torch flower root powder can be discharged from the discharge port 12.

[0038] Although the above methods are illustrated and described as a series of actions for simplicity of explanation, it should be understood and appreciated that these methods are not limited by the order of the actions, because according to one or more embodiments, some actions may occur in different orders and / or concurrently with other actions from the illustrations and descriptions herein or not illustrated and described herein but understandable to those skilled in the art. It will be further appreciated by those skilled in the art that the various illustrative logic blocks, modules, circuits, and algorithm steps described in conjunction with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or a combination of the two. To clearly explain this interchangeability of hardware and software, various illustrative components, frames, modules, circuits, and steps are generally described in the form of their functionality above. Whether such functionality is implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system. The technical staff can implement the described functionality in different ways for each specific application, but such implementation decisions should not be interpreted as resulting in a departure from the scope of the present invention. The various illustrative logic blocks, modules, and circuits described in conjunction with the embodiments disclosed herein may be implemented or executed with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in an alternative, the processor may be any conventional processor, a battery compartment control board, a micro-battery compartment control board, or a state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in cooperation with a DSP core, or any other such configuration. The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to a processor so that the processor can read and write information from / to the storage medium. In an alternative, the storage medium may be integrated into the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In an alternative, the processor and the storage medium may reside in a user terminal as discrete components. In one or more exemplary embodiments, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented as a computer program product in software, each function may be stored on a computer-readable medium or transmitted therefrom as one or more instructions or codes.Computer-readable media include both computer storage media and communication media, including any media that facilitates a computer program to be transferred from one place to another. Storage media can be any available media that can be accessed by a computer. As an example and not limitation, such computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage or other magnetic storage devices, or any other media that can be used to carry or store the agreed program code in the form of instructions or data structures and can be accessed by a computer. Any connection is also properly referred to as computer-readable media. For example, if software is transmitted from a web site, a central control computer, or other remote sources using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwaves, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwaves are included in the definition of medium. Disk and disc as used herein include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc, wherein disk often reproduces data magnetically, while disc reproduces data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0039] Although the above methods are illustrated and described as a series of actions for simplicity of explanation, it should be understood and appreciated that these methods are not limited by the order of the actions, because according to one or more embodiments, some actions may occur in a different order and / or concurrently with other actions from those illustrated and described herein or not illustrated and described herein but understandable to those skilled in the art.

[0040] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A vacuum drying device for direct powder of torch flower root, characterized in that: include: The tank body has a drying chamber inside, a feed inlet at the top of the tank body, and a discharge outlet at the bottom of the tank body; The main shaft is rotatably connected to the tank body at both ends, and a stirring unit is provided in the middle. The stirring unit includes a rotating shaft and a stirring plate distributed radially along the main shaft. The stirring plate is a multi-piece foldable hollow plate and can be extended or contracted along its telescopic direction under the drive of the rotating shaft. The main shaft and the rotating shaft are both hollow. The rotating shaft is also provided with a plurality of second air suction holes, which are connected to the internal cavity of the rotating shaft; The motor is located on the top of the tank and is used to drive the main shaft to rotate.

2. A vacuum drying device for direct powder of torch flower root according to claim 1, characterized in that: The rotating shaft is arranged radially along the main shaft, one end of the rotating shaft is rotatably connected to the main shaft and the cavities of the two are connected, and a third gear is fixed to the other end of the rotating shaft, a gear ring is fixed on the inner wall of the drying chamber, the third gear is meshed with the gear ring, a groove wheel is fixed in the middle of the rotating shaft, the axial direction of the groove wheel is consistent with the rotating shaft, and a closed annular groove is provided on the groove wheel. The stirring unit also includes a driven frame, the upper end of the driven frame is two vertical rods distributed on both sides of the groove wheel, the vertical rods are provided with pins inserted into the grooves, and a corresponding pin is provided on the stirring plate, and a horizontal plate fixed to the vertical rod is provided at the lower end of the driven frame, and a strip groove is provided on the horizontal plate. The pin extends into the strip groove and can drive the stirring plate to shrink or extend under the drive of the driven frame.

3. A vacuum drying device for direct powder of torch flower root according to claim 1 or 2, characterized in that: A discharge pipe and a valve for controlling the discharge of materials are also installed at the discharge port.

4. A vacuum drying device for direct powder of torch flower root according to claim 3, characterized in that: There are three groups of stirring units, which are evenly distributed around the main shaft axis.

5. A vacuum drying device for direct powder of torch flower root according to any one of claims 1, 2 or 4, characterized in that: Power transmission is achieved between the motor output shaft and the main shaft through bevel gears.

6. The vacuum drying device for direct powder of torch flower root according to claim 2, characterized in that: A plurality of material passing holes are arranged on the plate surface of the stirring plate.

7. A vacuum drying device for direct powder of torch flower root according to claim 6, characterized in that: The width of the hole for feeding the material can be set to 5mm-20mm.

8. A vacuum drying device for direct powder of torch flower root according to any one of claims 2, 6 or 7, characterized in that: The length direction of the strip groove is perpendicular to the axial direction of the groove wheel.

9. The vacuum drying device for direct powder of torch flower root according to claim 8, characterized in that: A surrounding plate is arranged on the inner wall of the drying chamber, and the surrounding plate and the inner wall of the drying chamber form a circle of air suction cavity. A plurality of third air suction holes connected with the air suction cavity are arranged on the surrounding plate, and an air suction pipe penetrating the inner wall of the drying chamber and extending to the outside is also arranged at the air suction cavity.

10. The vacuum drying device for direct powder of torch flower root according to claim 8, characterized in that: The distance between the stirring plate and the bottom surface of the drying chamber is set to 5mm-20mm.

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