A sulfur-free drying device for white peony

Abstract

This invention belongs to the technical field of Chinese medicinal material drying equipment, and discloses a sulfur-free drying device for white peony root, including a drying chamber, a storage structure for placing white peony root, and a storage rack for supporting the storage structure. Both the storage structure and the rack are located inside the drying chamber. The storage structure includes a tray and a protective cover. Air inlets and outlets are evenly distributed on the side walls of the tray and the protective cover, and several ventilation holes are evenly distributed on the inner walls of both the tray and the protective cover. During drying, hot air flows upward through the ventilation holes and passes through multiple storage structures. Simultaneously, a shaking structure drives the storage structures to shake. During this process, powder generated by the shaking or hot air is carried up by the upward airflow. At this time, the ventilation holes in the protective cover actively draw in air, promptly removing the powder suspended above the storage structure. This prevents the powder from adhering to the surface of the upper material under the influence of the rising airflow, solving the problem of unevenly colored peony root slices and ensuring a smooth, uniform color, thereby improving the product's appearance and grade.

Description

Technical Field

[0001] This invention belongs to the technical field of Chinese medicinal material drying equipment, specifically a sulfur-free drying equipment for white peony root. Background Technology

[0002] White peony root, the dried root of the peony plant (Paeonia lactiflora), belongs to the Ranunculaceae family. It possesses properties such as nourishing blood and regulating menstruation, astringing yin and stopping sweating, soothing the liver and relieving pain, and calming liver yang. It is one of the traditional medicinal materials commonly used in traditional Chinese medicine. Its origin and processing methods directly affect the quality and clinical efficacy of the medicinal material.

[0003] Currently, the main drying methods for white peony root at its production sites are traditional sun-drying and hot air drying. Traditional sun-drying is constrained by weather conditions, has a long drying cycle, is susceptible to dust and insect contamination, and is difficult to scale up and standardize. With the promotion of sulfur-free processing technology, hot air drying equipment is increasingly widely used in the processing of white peony root at its production sites due to its advantages such as high drying efficiency, lack of limitation by natural conditions, and ease of industrial production.

[0004] Existing hot air drying equipment often employs a multi-layer tray structure and, in pursuit of drying efficiency, typically uses a bottom-up vertical airflow method. During the drying process, the powder remaining from the slicing process, due to friction between the white peony slices (especially after cutting), is easily blown up and carried by the strong upward hot airflow. Because the drying chamber has a multi-layer structure, the powder generated by the bottom layer of material adheres in large quantities to the surface of the upper layer of material under the influence of the rising airflow. When this powder comes into contact with the still-moist white peony slices, it forms difficult-to-remove spots or stains (commonly known as "blemishes"), severely damaging the smoothness and color consistency of the medicinal material's surface, directly leading to a reduction in the product's appearance and grade, resulting in economic losses. Summary of the Invention

[0005] The purpose of this invention is to provide a sulfur-free drying device for white peony to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a sulfur-free drying device for white peony, comprising a drying chamber, a storage structure for placing white peony, and a storage rack for supporting the storage structure, wherein the storage structure and the storage rack are both disposed within the drying chamber, and multiple storage structures and storage racks are evenly arranged therein. One side of the storage structure is provided with a shaking structure for driving it to shake, and the storage structure is provided with a turning structure for turning over the white peony slices. The storage structure includes a tray and a protective cover, which are detachably connected. The inner walls of both the tray and the protective cover are evenly provided with several through holes for the flow of drying gas. The side walls of the tray and the protective cover are evenly provided with air inlets and outlets, which are connected to the air pump through a circulating air path assembly to form a closed-loop airflow circuit. Both the tray and the protective cover are hollow, and the inner walls of the tray and the protective cover are evenly provided with a number of ventilation holes. The two sets of ventilation holes are symmetrically distributed and are respectively connected to the inner cavities of the air inlet and the air outlet.

[0007] As a further technical solution of the present invention, the circulating air path assembly includes an air outlet pipe and an air inlet pipe, the air outlet pipe and the air inlet pipe being connected to the air outlet end and the air inlet end of the air pump respectively, and a filter box is also installed between the air inlet pipe and the air pump. Each of the air inlets is embedded with a first connecting pipe, and a second connecting pipe is installed at the end of each first connecting pipe away from the air inlet. Each second connecting pipe is connected to an air outlet pipe. Each of the air outlets is embedded with a third connecting pipe, and a fourth connecting pipe is installed at the end of each third connecting pipe away from the air outlet. Each fourth connecting pipe is connected to the air inlet pipe. Several of the first and third connecting pipes are connected by connecting plates, which are elastically installed in the drying chamber by a first spring.

[0008] As a further technical solution of the present invention, the wobbling structure includes a rotating shaft and cams, wherein a plurality of cams are provided and are arranged at equal intervals on the outer wall of the rotating shaft, and a motor is installed at one end of the rotating shaft; A movable plate is provided on one side of the cam. The movable plate is elastically installed in the drying chamber by a tension spring. The side of the movable plate away from the cam slides against the outer wall of the storage structure.

[0009] As a further technical solution of the present invention, the material turning structure includes a material turning plate, a connecting block and a mounting block, wherein two mounting blocks are provided, and the two mounting blocks are slidably mounted in the tray through a transmission component; Multiple flipping plates and connecting blocks are provided between the two mounting blocks, and the multiple flipping plates and connecting blocks are arranged alternately.

[0010] As a further technical solution of the present invention, the two sides of the flipping plate are inclined.

[0011] As a further technical solution of the present invention, the flipping plate is elastically connected to the connecting block by a second spring.

[0012] As a further technical solution of the present invention, the tilting plate is hollow, and a sphere is movably installed inside the tilting plate.

[0013] As a further technical solution of the present invention, the transmission component includes a ring gear rotatably mounted in the tray, a fan fixedly connected inside the ring gear, and the fan being disposed in one of the air inlets; The top of the ring gear meshes with a transmission gear, and a transmission shaft is fixedly installed inside the transmission gear. One side of the transmission shaft is connected to a reciprocating screw via a belt drive mechanism. The reciprocating screw is embedded in one of the mounting blocks and the two are threaded together.

[0014] As a further technical solution of the present invention, two limiting blocks are elastically installed on the top of the shelf by a third spring, the two limiting blocks are fixedly connected to each other, and both limiting blocks are located on the front side of the shelf structure.

[0015] As a further technical solution of the present invention, a guide rod is fixedly connected to the outer wall of one of the limiting blocks, and a wedge is slidably installed at one end of the guide rod, and the wedge is fixedly installed on one side of the connecting plate.

[0016] The beneficial effects of this invention are as follows: 1. This invention utilizes a storage structure consisting of a tray and a protective cover. A vent at the bottom of the tray connects to the air pump outlet, and a vent at the top of the protective cover connects to the air pump inlet. Combined with a circulating airflow assembly, this forms a closed-loop airflow circuit, enabling proactive source control of powder generated during the drying process. Specifically, during drying, hot air flows upward through the material layer, while a shaking structure drives the entire storage structure to shake, causing the peony flakes to continuously tumble and shift. Simultaneously, the vent at the top of the protective cover continuously draws in air, creating a negative pressure zone at the top of the box. This immediately removes the powder stirred up by the shaking or hot air. The clean hot air, filtered by the filter box, is then blown back into the box through the vent at the bottom of the tray, forming a directional circulating airflow. This design fundamentally changes the passive situation in traditional multi-layer drying equipment where powder spreads disorderly with the rising airflow and adheres layer by layer. Through closed-loop control of "air intake and powder collection - filtration and purification - air circulation," the path of powder from the bottom layer to the upper layer is completely blocked. The powder is actively removed while it is still in suspension, preventing it from coming into contact with the still-moist white peony slices and forming difficult-to-remove "flower petals". This ensures the smoothness and color consistency of the medicinal material surface, significantly improves the product's appearance and grade, and solves the long-standing technical problem of powder contamination leading to quality decline in existing technologies.

[0017] 2. This invention achieves a passive micro-vibration self-cleaning function by setting the turning plate as a hollow structure and installing a sphere inside it. Utilizing the shaking of the equipment itself and the reciprocating movement of the turning plate as the power source, it realizes this function. When the entire structure shakes or the turning plate reciprocates, the sphere rolls freely and collides randomly within the hollow cavity under inertia, continuously striking the inner wall of the turning plate and generating high-frequency micro-vibrations. This vibration effectively prevents peony powder from adhering to the surface of the turning plate, keeping it clean and reducing the frequency of manual cleaning. Furthermore, the vibration is transmitted through the turning plate to the surface of the peony flakes it contacts, helping to shake off any dried but not yet detached loose powder, allowing it to fall into the airflow field and be promptly absorbed. For peony flakes that may have a slightly sticky surface due to starch precipitation, the weak vibration also prevents them from adhering tightly to the turning plate for extended periods, reducing adhesion and friction damage. This design transforms a simple mechanical structure into a multifunctional passive intelligent unit. Without adding an extra power source or electrical components, it achieves multiple benefits such as self-cleaning of the turning plate, auxiliary powder separation, and reduction of material adhesion. This not only improves the reliability of equipment operation but also further optimizes the drying quality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic cross-sectional view of the drying chamber structure of the present invention; Figure 3 This is a schematic cross-sectional view of the overall structure of the present invention; Figure 4 For the present invention Figure 3 Enlarged schematic diagram of the structure at point A in the middle; Figure 5 This is a schematic diagram of the structure of the circulating air path component of the present invention; Figure 6 This is a schematic diagram of the drying chamber structure of the present invention; Figure 7 This is a schematic diagram of the storage structure of the present invention; Figure 8 This is a schematic cross-sectional view of the storage structure of the present invention; Figure 9 For the present invention Figure 8 Enlarged schematic diagram of the structure at point B; Figure 10 This is a cross-sectional schematic diagram of the material turning structure of the present invention.

[0019] In the diagram: 1. Drying chamber; 2. Storage structure; 7. Storage rack; 4. Shaking structure; 5. Material turning structure; 21. Tray; 22. Protective cover; 23. Through hole; 31. Air inlet; 32. Air outlet; 33. Vent hole; 34. Air outlet pipe; 35. Air inlet pipe; 36. Filter box; 37. Air pump; 38. Connecting plate; 39. First spring; 311. First connecting pipe; 312. Second connecting pipe; 321. Third connecting pipe; 322. Fourth connecting pipe; 41. Rotating shaft; 42. Cam; 43. Motor; 44. Movable plate; 45. Tension spring; 51. Flip plate; 52. Connecting block; 53. Mounting block; 54. Reciprocating lead screw; 55. Fan; 56. Ring gear; 57. Transmission gear; 58. Transmission shaft; 59. Belt drive mechanism; 511. Sphere; 512. Second spring; 6. Limiting block; 61. Third spring; 62. Guide rod; 63. Wedge block. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figures 1 to 10 As shown in the embodiment of the present invention, a sulfur-free drying device for white peony includes a drying chamber 1, a storage structure 2 for placing white peony, and a storage rack 7 for supporting the storage structure 2. The storage structure 2 and the storage rack 7 are both arranged in the drying chamber 1, and multiple storage structures 2 and multiple storage racks 7 are evenly arranged. A shaking structure 4 for driving the shaking is provided on one side of the storage structure 2, and a turning structure 5 for turning the white peony slices is provided inside the storage structure 2. The storage structure 2 includes a tray 21 and a protective cover 22. The tray 21 and the protective cover 22 are detachably connected. The inner walls of the tray 21 and the protective cover 22 are evenly provided with a number of through holes 23 for the flow of drying gas. The side walls of the tray 21 and the protective cover 22 are evenly provided with air inlets 31 and air outlets 32, respectively. The air inlets 31 and air outlets 32 are connected to the air pump 37 through the circulating air path assembly to form a closed-loop airflow circuit. Both the tray 21 and the protective cover 22 are hollow. The inner walls of both the tray 21 and the protective cover 22 are evenly provided with several ventilation holes 33. The two sets of ventilation holes 33 are symmetrically distributed and are connected to the inner cavities of the air inlet 31 and the air outlet 32, respectively.

[0022] The top two sides of the tray 21 are provided with grooves for receiving the protrusions. The protrusions are fixedly installed on the bottom of the protective cover 22. The two can be magnetically connected, so that the tray 21 and the protective cover 22 can be detached. A handle is fixedly installed on the front side of the tray 21 to facilitate the user to pick up the storage structure 2.

[0023] When using, first place the storage structure 2 containing white peony slices on top of the storage rack 7, and push it completely into the drying chamber 1; During drying, hot air flows from bottom to top through the through hole 23 and through multiple storage structures 2, while the shaking structure 4 drives the storage structures 2 to shake. During this process, the powder generated by shaking or hot air is carried up by the upward airflow. At this time, the vent 33 in the protective cover 22 actively draws in air and removes the powder suspended in the upper part of the storage structure 2 in time, so as to prevent the powder from adhering to the surface of the upper material under the influence of the rising airflow, thereby solving the problem of mottled pieces, making the surface of the white peony pieces smooth and the color uniform, thus improving the appearance and grade of the product.

[0024] like Figures 1 to 10 As shown, the circulating air path assembly includes an air outlet pipe 34 and an air inlet pipe 35. The air outlet pipe 34 and the air inlet pipe 35 are respectively connected to the air outlet end and the air inlet end of the air pump 37. A filter box 36 is also installed between the air inlet pipe 35 and the air pump 37. Each air inlet 31 is embedded with a first connecting pipe 311, and a second connecting pipe 312 is installed at the end of each first connecting pipe 311 away from the air inlet 31. Each second connecting pipe 312 is connected to the air outlet 34. Each air outlet 32 ​​is embedded with a third connecting pipe 321, and a fourth connecting pipe 322 is installed at the end of each third connecting pipe 321 away from the air outlet 32. Each fourth connecting pipe 322 is connected to the air inlet pipe 35. Several first connecting pipes 311 and third connecting pipes 321 are connected by connecting plates 38, which are elastically installed in the drying chamber 1 by first springs 39.

[0025] During use, the air pump 37 generates negative pressure in the air inlet pipe 35, which is then connected to the second connecting pipe 312 via the fourth connecting pipe 322. This allows air to be drawn in through the vent holes 33 in the protective cover 22, removing suspended powder. After filtration through the filter box 36, the gas is discharged into the air outlet pipe 34, which is then connected to the first connecting pipe 311 via the second connecting pipe 312. This allows air to exit through the vent holes 33 in the tray 21, creating a gas circulation within the storage structure 2. The continuous hot air circulation further stabilizes the temperature field within the storage structure 2, resulting in higher drying efficiency.

[0026] The dust-laden gas is filtered through filter box 36 and then recycled, which avoids the powder being blown onto the material surface a second time. This further solves the problem of mottled flakes caused by powder adhesion in traditional drying and ensures the appearance of the white peony flakes.

[0027] Directional, clean hot air continuously passes through the material layer from bottom to top, which not only ensures the uniformity and efficiency of drying, but also works synergistically with the air intake of the protective cover 22 to actively guide the powder out and optimize the microenvironment inside the storage structure 2.

[0028] like Figure 2 As shown, the wobbling structure 4 includes a rotating shaft 41 and a cam 42. Several cams 42 are provided and are arranged at equal intervals on the outer wall of the rotating shaft 41. A motor 43 is installed at one end of the rotating shaft 41. A movable plate 44 is provided on one side of the cam 42. The movable plate 44 is elastically installed in the drying chamber 1 by a tension spring 45. The side of the movable plate 44 away from the cam 42 slides against the outer wall of the storage structure 2.

[0029] The connection between the first connecting pipe 311 and the second connecting pipe 312 is a flexible connection, and the connection between the third connecting pipe 321 and the fourth connecting pipe 322 is a flexible connection, such as a corrugated pipe. The connecting plate 38 is magnetically connected to the outer wall of the storage structure 2 to ensure the stability of the pipeline connection when the storage structure 2 shakes; A sealing gasket (not shown in the figure) is installed on the side of the connecting plate 38 near the storage structure 2. The sealing gasket is set on the outer ring of the first connecting pipe 311 and the third connecting pipe 321 to seal between the first connecting pipe 311 and the air inlet 31, and between the third connecting pipe 321 and the air outlet 32.

[0030] In use, the rotating shaft 41 is driven to rotate by the motor 43. The rotation of the rotating shaft 41 drives the cam 42 to rotate. When the cam 42 rotates, it cooperates with the tension spring 45 to make the storage structure 2 sway.

[0031] This facilitates the continuous tumbling and displacement of the white peony slices within the storage structure 2, exposing the parts originally pressed against the bottom of the structure to the hot air, thus loosening the material and improving air permeability. It eliminates drying dead zones caused by uneven material accumulation, resulting in a more uniform drying degree within the storage structure 2.

[0032] like Figure 8 , Figure 9 and Figure 10 As shown, the material turning structure 5 includes a material turning plate 51, a connecting block 52 and a mounting block 53. There are two mounting blocks 53, and the two mounting blocks 53 are slidably mounted in the tray 21 through a transmission assembly. Multiple flipping plates 51 and connecting blocks 52 are provided between the two mounting blocks 53, and the multiple flipping plates 51 and connecting blocks 52 are arranged alternately.

[0033] During use, the material-turning structure 5 moves back and forth within the storage structure 2, continuously changing the contact surface between the peony slices and the hot air. This exposes parts that were originally pressed against the bottom and sides of the storage structure 2, continuously updating the heat exchange interface. This significantly improves the contact efficiency between the hot air and the material, as well as the effective heat exchange area, shortening the drying cycle and increasing production efficiency with the same energy consumption.

[0034] This further avoids bottom dampness (drying dead corners) or localized overheating (scorch spots) caused by accumulation, achieving a high degree of consistency in the dryness of the entire box of materials and improving the overall quality of the product.

[0035] like Figure 8 and Figure 10 As shown, the two sides of the flipping plate 51 are inclined.

[0036] When the material-turning structure 5 comes into contact with the white peony slices, the inclined surface gently scoops up and lifts the bottom layer of material, creating a loosening effect in the tightly packed white peony slice layer and improving air permeability. At the same time, it helps to push and roll the material to the other side, achieving overall circulation and flow of the material and avoiding local accumulation.

[0037] The material turning is more thorough and even, and a single reciprocating motion can achieve multiple effects of "lifting + pushing + tumbling", significantly improving the material turning efficiency.

[0038] Furthermore, the inclined surface can prevent right-angled edges from "cutting" or "pushing" materials, reducing mechanical damage.

[0039] like Figure 10 As shown, the flipping plate 51 is elastically connected to the connecting block 52 via the second spring 512.

[0040] When the tipping plate 51 encounters a hard object or gets stuck during movement, the elastic connection allows the tipping plate 51 to rise, avoiding rigid impact and helping to reduce the risk of white peony slices being squeezed, cut or broken.

[0041] When the placement structure 2 shakes or the tilting structure 5 moves back and forth, the spheres 511 inside the tilting plate 51 will roll freely and collide randomly within the hollow cavity due to inertia. This collision will continuously strike the inner wall of the tilting plate 51, generating high-frequency micro-vibrations. Vibration can effectively prevent peony powder from adhering to the surface of the tilting plate 51, keeping the tilting plate 51 clean and reducing the frequency of manual cleaning.

[0042] like Figure 10 As shown, the tilting plate 51 is hollow, and a ball 511 is movably installed inside the tilting plate 51.

[0043] The impact of the sphere 511 on the inner wall of the turning plate 51 is transmitted to the surface in contact with the material. This localized, intermittent impact force acts on the peony flakes in contact with the turning plate 51. This helps to shake off the loose powder that has dried but not yet fallen off the surface of the peony flakes, allowing it to fall into the airflow field and be promptly drawn away.

[0044] For peony slices that may become slightly sticky due to starch precipitation, weak vibration can prevent them from sticking tightly to the turning plate 51 for a long time, reducing adhesion and friction damage.

[0045] like Figure 8 , Figure 9 and Figure 10 As shown, the transmission assembly includes a ring gear 56 rotatably mounted in the tray 21, a fan 55 fixedly connected inside the ring gear 56, and the fan 55 is disposed in one of the air inlets 31. The top of the ring gear 56 is meshed with a transmission gear 57, and a transmission shaft 58 is fixedly installed inside the transmission gear 57. One side of the transmission shaft 58 is connected to a reciprocating screw 54 through a belt drive mechanism 59. The reciprocating screw 54 is embedded in one of the mounting blocks 53 and the two are threaded together.

[0046] When in use, when gas enters the air inlet 31, it drives the fan 55 to rotate. The rotation of the fan 55 drives the ring gear 56 to rotate, the rotation of the ring gear 56 drives the transmission gear 57 to rotate, the rotation of the transmission gear 57 drives the transmission shaft 58 to rotate, and the rotation of the transmission shaft 58 drives the reciprocating screw 54 to rotate through the belt transmission mechanism 59, providing power for the reciprocating movement of the material turning structure 5 within the placement structure 2.

[0047] The material-turning structure 5 is moved by airflow, and the accumulated peony flakes are continuously turned and broken up by physical means, so that each flake can be exposed to hot air. This achieves a perfect synergy of "turning material and blowing powder, blowing powder and removing powder", eliminating powder diffusion and secondary adhesion at the source.

[0048] like Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, two limiting blocks 6 are elastically installed on the top of the shelf 7 via a third spring 61. The two limiting blocks 6 are fixedly connected to each other, and both limiting blocks 6 are located on the front side of the shelf structure 2.

[0049] The side of the limiting block 6 away from the placement structure 2 is set as an inclined surface; When the storage structure 2 is placed, the storage structure 2 presses the limiting block 6 downward. After it is fully placed, the elastic potential energy is released by the third spring 61 to move the limiting block 6 upward and reset. The two limiting blocks 6 limit the storage structure 2 to ensure the stability of the storage structure 2 during drying and shaking.

[0050] like Figure 3 and Figure 4 As shown, a guide rod 62 is fixedly connected to the outer wall of one of the limiting blocks 6, and a wedge 63 is slidably installed at one end of the guide rod 62. The wedge 63 is fixedly installed on one side of the connecting plate 38.

[0051] When the storage structure 2 is placed, the limiting block 6 moves down, causing the guide rod 62 to move down. The guide rod 62 contacts the wedge block 63 and pushes it to one side. The movement of the guide rod 62 causes the connecting plate 38 to move. The movement of the connecting plate 38 causes the first connecting pipe 311 and the third connecting pipe 321 to move away from the storage structure 2, making it easier to put the storage structure 2 in. When the limit block 6 is reset, the connecting plate 38 is reset, which drives the third connecting pipe 321 and the first connecting pipe 311 to move and embed into the air outlet 32 ​​and the air inlet 31.

[0052] Working principle and usage process: When using, first place the storage structure 2 containing white peony slices on top of the storage rack 7, and push it completely into the drying chamber 1; When the storage structure 2 slides, it presses the limiting block 6 downward. The downward movement of the limiting block 6 causes the guide rod 62 to move downward. The guide rod 62 contacts the wedge block 63 and pushes it to one side. The movement of the guide rod 62 causes the connecting plate 38 to move. The movement of the connecting plate 38 causes the first connecting tube 311 and the third connecting tube 321 to move away from the storage structure 2, making it easier to put the storage structure 2 in. When fully placed, the elastic potential energy is released by the third spring 61, causing the limiting block 6 to move upward and reset. The two limiting blocks 6 limit the placement structure 2, and the resetting of the connecting plate 38 drives the third connecting pipe 321 and the first connecting pipe 311 to move and embed into the air outlet 32 ​​and the air inlet 31.

[0053] During drying, hot air flows from bottom to top through the through hole 23 and through multiple storage structures 2, and drives the rotating shaft 41 to rotate via the motor 43. The rotation of the rotating shaft 41 drives the rotation of the cam 42. When the cam 42 rotates, it cooperates with the tension spring 45 to make the storage structure 2 sway. At the same time, the air pump 37 generates negative pressure in the air inlet pipe 35, and connects to the second connecting pipe 312 via the fourth connecting pipe 322, so that the air vent 33 in the protective cover 22 draws in air, sucking away the suspended powder. After being filtered by the filter box 36, the gas is discharged into the air outlet pipe 34, and connected to the first connecting pipe 311 via the second connecting pipe 312, so that the air vent 33 in the tray 21 releases air, and the gas circulates within the storage structure 2. When gas enters the air inlet 31, it drives the fan 55 to rotate. The rotation of the fan 55 drives the ring gear 56 to rotate, which in turn drives the transmission gear 57 to rotate. When the transmission gear 57 rotates, it drives the transmission shaft 58 to rotate. When the transmission shaft 58 rotates, it drives the reciprocating screw 54 to rotate through the belt transmission mechanism 59. The rotation of the reciprocating screw 54 drives the mounting block 53 to move back and forth in the tray 21. The movement of the mounting block 53 drives the turning plate 51 and the connecting block 52 to move. By continuously changing the contact surface between the white peony flakes and the hot air through the turning plate 51, the contact efficiency between the hot air and the material and the effective heat exchange area are improved, thus achieving sulfur-free drying of white peony.

[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A white peony root sulfur-free airing and drying device, comprising a drying bin (1), a placing structure (2) for placing white peony roots and a placing rack (7) for bearing the placing structure (2), the placing structure (2) and the placing rack (7) are both arranged in the drying bin (1), and the placing structure (2) and the placing rack (7) are both uniformly provided with a plurality of. characterized in that One side of the placing structure (2) is provided with a shaking structure (4) for driving the shaking thereof, and the placing structure (2) is provided with a material turning structure (5) for turning white peony root pieces. The placing structure (2) comprises a tray (21) and a protective cover (22), the tray (21) and the protective cover (22) are detachably connected, and the inner walls of the tray (21) and the protective cover (22) are both uniformly provided with a plurality of through holes (23) for the circulation of drying gas. The side walls of the tray (21) and the protective cover (22) are respectively and uniformly provided with an air inlet hole (31) and an air outlet hole (32), the air inlet hole (31) and the air outlet hole (32) are connected with a gas pump (37) through a circulating air path assembly to form a closed-loop air flow circuit. The tray (21) and the protective cover (22) are both hollow, the inner walls of the tray (21) and the protective cover (22) are both uniformly provided with a plurality of air permeable holes (33), two groups of the air permeable holes (33) are symmetrically distributed, and the two groups of air permeable holes (33) are respectively communicated with the inner cavities of the air inlet hole (31) and the air outlet hole (32).

2. The white peony root sulfur-free airing and drying device according to claim 1, characterized in that: The circulating air path assembly comprises an air outlet pipe (34) and an air inlet pipe (35), the air outlet pipe (34) and the air inlet pipe (35) are respectively connected with the air outlet end and the air inlet end of the gas pump (37), and a filter box (36) is further installed between the air inlet pipe (35) and the gas pump (37). A first connecting pipe (311) is embedded in each air inlet hole (31), a second connecting pipe (312) is installed at the end of each first connecting pipe (311) away from the air inlet hole (31), and each second connecting pipe (312) is connected with the air outlet pipe (34). A third connecting pipe (321) is embedded in each air outlet hole (32), a fourth connecting pipe (322) is installed at the end of each third connecting pipe (321) away from the air outlet hole (32), and each fourth connecting pipe (322) is connected with the air inlet pipe (35). The first connecting pipes (311) and the third connecting pipes (321) are connected through a connecting plate (38), and the connecting plate (38) is elastically installed in the drying bin (1) through a first spring (39).

3. The white peony root sulfur-free drying equipment according to claim 1, characterized in that: The shaking structure (4) comprises a rotating shaft (41) and a cam (42), the cam (42) is provided with a plurality of and equidistantly arranged on the outer wall of the rotating shaft (41), and a motor (43) is installed at one end of the rotating shaft (41). One side of the cam (42) is provided with a movable plate (44), the movable plate (44) is elastically installed in the drying bin (1) through a tension spring (45), and one side of the movable plate (44) away from the cam (42) is slidably attached to the outer wall of the placing structure (2).

4. The white peony root sulfur-free drying equipment according to claim 1, characterized in that: The material turning structure (5) includes a material turning plate (51), a connecting block (52) and a mounting block (53). There are two mounting blocks (53), and the two mounting blocks (53) are slidably mounted in the tray (21) through a transmission assembly. Multiple flip-plates (51) and connecting blocks (52) are provided between the two mounting blocks (53), and the multiple flip-plates (51) and connecting blocks (52) are arranged alternately.

5. The white peony root sulfur-free drying device according to claim 4, characterized in that: The two sides of the flipping plate (51) are inclined.

6. The white peony root sulfur-free drying device according to claim 4, characterized in that: The flip plate (51) is elastically connected to the connecting block (52) by a second spring (512).

7. The white peony root sulfur-free drying device according to claim 4, characterized in that: The turning plate (51) is hollow inside, and a ball (511) is movably installed inside the turning plate (51).

8. The white peony root sulfur-free drying device according to claim 4, characterized in that: The transmission assembly includes a ring gear (56) rotatably mounted in a tray (21), and a fan (55) is fixedly connected inside the ring gear (56). The fan (55) is disposed in one of the air inlets (31). The top of the ring gear (56) is meshed with a transmission gear (57), and a transmission shaft (58) is fixedly installed inside the transmission gear (57). One side of the transmission shaft (58) is connected to a reciprocating screw (54) through a belt drive mechanism (59). The reciprocating screw (54) is embedded in one of the mounting blocks (53) and the two are threaded together.

9. The white peony root sulfur-free drying device according to claim 4, characterized in that: The top of the shelf (7) is elastically mounted with two limiting blocks (6) by a third spring (61). The two limiting blocks (6) are fixedly connected to each other, and both limiting blocks (6) are located on the front side of the shelf structure (2).

10. The white peony root sulfur-free drying device according to claim 9, characterized in that: One of the limiting blocks (6) has a guide rod (62) fixedly connected to its outer wall. A wedge (63) is slidably installed at one end of the guide rod (62). The wedge (63) is fixedly installed on one side of the connecting plate (38).

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