Traditional Chinese medicinal material drying device

Abstract

The invention provides a traditional Chinese medicinal material drying device, and belongs to the technical field of medicinal material drying. The invention discloses a traditional Chinese medicinal material drying device. A microwave generating assembly comprises a hollow fixing shaft, at least three annular fan-shaped outer arc opening shielding microwave cavities and a microwave generator. The hollow fixed shaft is erected and fixed in the shielding shell, the shielding shell is fixedly arranged on the main body bracket, a water vapor channel is arranged on the shielding shell, and a shielding door is arranged on one side of the shielding shell along the length direction of the hollow fixed shaft; the microwave cavities are evenly distributed in the circumferential direction of the hollow fixing shaft. The microwave generator is arranged on the inner arc of the microwave cavity; the microwave generation assembly is sleeved with the auxiliary heating assembly, and the auxiliary heating assembly is rotationally connected with the hollow fixing shaft through bearings on the two sides; the power transmission assembly is in transmission connection with the ceramic rotary drum. The microwave energy utilization rate is increased, medicinal materials can be evenly heated in the drying process, and the problems that in the prior art, the microwave energy utilization rate is low, and heating is uneven are effectively solved.

Description

Technical Field

[0001] The invention belongs to the technical field of medicinal material drying, and in particular relates to a Chinese medicinal material drying device. Background Art

[0002] In order to ensure the medicinal properties and effective ingredients of Chinese medicinal materials, modern Chinese medicinal material drying technology conducts appropriate drying treatment on Chinese medicinal materials under artificial control conditions. Traditional processes often use methods such as drying, fire roasting, and natural drying. Its characteristics are that the temperature of the material increases from the outside to the inside, and the dehydration speed gradually decreases from the outside to the inside. The water content of the inner layer is much greater than that of the outer layer, and a drying shell is easily formed on the outer layer, affecting the drying speed and quality, resulting in problems such as long drying time and poor heating uniformity.

[0003] Modern processes mostly use conduction, convection, radiation or heating in a high-frequency electric field to dry it. Most of them use hot air convection drying and microwave drying to promote water evaporation, achieve the required moisture content, maintain high product quality, and facilitate packaging, storage, and transportation.

[0004] However, the hot air convection drying method consumes a lot of energy and easily destroys the effective ingredients of the medicinal materials. The microwave drying method is to keep the medicinal materials in a uniformly heated state and to achieve the drying operation while maximally preserving the effective ingredients of the medicinal materials.

[0005] A Chinese patent document with application number CN201911312339.4 discloses a microwave vacuum drying method for medicinal materials, which uses vacuum microwave drying to achieve drying and heating operations on medicinal materials. However, its effective utilization rate of microwave energy is low and the problem of uneven drying and heating of medicinal materials has not been completely solved. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a Chinese medicinal material drying device to achieve the Chinese medicinal material drying operation with high efficiency and energy saving in view of the deficiencies in the prior art.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: A Chinese herbal medicine drying device includes a microwave generating assembly, an auxiliary heating assembly, a power transmission assembly, a shielding shell and a main body support. The microwave generating assembly includes a hollow fixed shaft, at least three shielding microwave cavities with annular fan-shaped outer arc openings and a microwave generator; the hollow fixed shaft is mounted and fixed in the shielding shell, the shielding shell is fixedly arranged on the main body support, a water vapor channel is arranged on the shielding shell, and a shielding door is arranged on one side of the shielding shell along the length direction of the hollow fixed shaft; the microwave cavities are evenly distributed along the circumference of the hollow fixed shaft; the microwave generator is arranged on the inner arc of the shielding microwave cavity with annular fan-shaped outer arc openings; the auxiliary heating assembly is sleeved on the outside of the microwave generating assembly and is rotatably connected to the hollow fixed shaft through bearings on both sides; the power transmission assembly is transmission-connected to the auxiliary heating assembly.

[0008] Furthermore, hemispherical depressions are randomly arranged on the inner surface of the microwave cavity; the edges and corners inside the microwave cavity are all rounded; and the opening angle of the fan-shaped outer arc of the microwave cavity ring is greater than 60 degrees and less than 120 degrees.

[0009] Furthermore, an isolation cavity is provided between adjacent microwave cavities; the isolation cavity is a closed structure cavity filled with absorbing material.

[0010] Furthermore, the auxiliary heating component includes a ceramic drum, and a ceramic box component detachably fixed to the outside of the ceramic drum; the bearings on both sides of the ceramic drum are rotatably connected to the hollow fixed shaft; the ceramic box component includes a number of low-porosity porous ceramic boxes, a U-shaped positioning card and a flexible microwave shielding layer; the bottom of the positioning card is riveted to the flexible microwave shielding layer by non-metallic rivets, and a clamping groove corresponding to the positioning card is opened on the outside of the porous ceramic box; the porous ceramic box is clamped and fixed to the flexible microwave shielding layer by the positioning card.

[0011] Preferably, the porous ceramic box is an open structure at one end; and side guard plates are provided at both axial ends of the ceramic drum.

[0012] Furthermore, a material collecting assembly is extended in the opening direction of the shielding door; the material collecting assembly includes a base plate, a sliding plate, a material collecting trough and a splicing arch bridge; the right half of the splicing arch bridge is fixedly arranged on the main body bracket in the shielding door, and the left half is fixedly arranged on the sliding plate; the sliding plate is slidably limitedly connected to the sliding limit groove arranged on the base plate through a limit column.

[0013] Furthermore, the bottom of the base plate on the same side as the opening end of the porous ceramic box is hinged to the support leg through a hinge shaft, and an "L"-shaped material collection trough is fixedly provided on the side of the base plate close to the hinge shaft; one end of the material collection trough is tilted downward; a slide groove is fixedly provided at the bottom of the side of the base plate away from the material collection trough, a slider is limitedly slidably connected in the slide groove, a rotating shaft is provided on the outside of the fixed shaft of the slider, and the rotating shaft is fixedly connected to the power output end of the hydraulic lifting rod.

[0014] Furthermore, a positioning hole is provided on the sliding plate, and a limiting hole is provided on the bottom plate opposite to the positioning hole; the sliding plate is fixed relative to the bottom plate by a positioning pin passing through the positioning hole and the limiting hole.

[0015] Preferably, the flexible microwave shielding layer is made of a steel wire shielding mesh mixed with nylon 46 fiber (PA46).

[0016] Furthermore, the surface of the sliding plate is a magnetic attraction surface.

[0017] Compared with the prior art, the present invention improves the utilization rate of microwave energy by combining a microwave generating assembly with an auxiliary heating assembly, so that the medicinal materials can be evenly heated during the drying process, effectively solving the problems of low microwave energy utilization and uneven heating in the prior art. The design of the microwave cavity in the microwave generating assembly enables microwaves to be more evenly distributed in the entire drying space. The porous ceramic box structure with low porosity further reduces microwave scattering loss. At the same time, the heat obtained by heat transfer between water vapor and ceramic when escaping is reversely and evenly conducted to the surface of the medicinal materials by using the thermal conductivity of ceramics, forming a dual drying mode of "internal microwave heating + external ceramic thermal conduction", accelerating the migration of internal moisture to avoid local overheating or insufficient heating. The low porosity structure can also control local humidity during the drying process, which is suitable for medicinal materials that need to be dried in stages, helps to converge the medicinal properties, further improves the drying efficiency and quality, and maximizes the retention of the effective ingredients of the medicinal materials. The hydraulic adjustment of the tilt angle, combined with the magnetic positioning of the sliding plate and the collection trough, can achieve rapid collection of the dried medicinal materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 : A three-dimensional schematic diagram of the overall structure of the ceramic box assembly of the present invention in a state of collecting cloth; Figure 2: A schematic diagram of the cross-sectional structure of the ceramic box assembly of the present invention when it is in a fixed state outside the ceramic drum; Figure 3 : A schematic diagram of the internal cross-sectional structure of the shielding shell of the present invention; Figure 4 : A schematic diagram of the internal cross-sectional structure of the ceramic drum of the present invention; Figure 5 : Schematic diagram of the three-dimensional structure of the present invention; Figure 6 : A schematic diagram of the structure of a ceramic box component of the present invention; Figure 7 : Schematic diagram of the structure of the porous ceramic box of the present invention; Figure 8 : A schematic diagram of the cross-sectional structure of the chute of the present invention; Among them, 1-microwave generating assembly, 11-hollow fixed shaft, 12-microwave cavity, 13-microwave generator, 14-isolation cavity, 2-auxiliary heating assembly, 21-bearing, 22-ceramic drum, 23-ceramic box assembly, 231-porous ceramic box, 232-U-shaped positioning card, 233-flexible microwave shielding layer, 234-non-metallic rivet, 235-card slot, 24-side guard plate, 3-power transmission assembly, 4-shielded shell , 41-water vapor channel, 42-shielding door, 5-main bracket, 6-collecting cloth assembly, 61-bottom plate, 611-sliding limit groove, 612-hinge shaft, 613-support foot, 614-slide groove, 615-slider, 616-fixed shaft, 617-rotating shaft, 618-hydraulic lifting rod, 62-sliding plate, 621-limiting column, 622-positioning hole, 63-collecting trough, 64-joined arch bridge, 65-positioning pin. DETAILED DESCRIPTION

[0020] In order to better understand the present invention, the content of the present invention is further clearly set forth in conjunction with the embodiments below, but the protection content of the present invention is not limited to the following embodiments. In the following description, a large number of specific details are provided in order to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details.

[0021] Although relative terms such as "upper", "lower", "left" and "right" are used in this specification to describe the relative relationship of one component of the illustration to another component, these terms are used in this specification only for convenience, such as according to the direction of the examples described in the drawings. It is understood that if the device of the illustration is turned over to make it upside down, the component described as "upper" will become the component "lower". When a certain structure is "on" other structures, it may mean that the certain structure is formed integrally on the other structure, or that the certain structure is "directly" disposed on the other structure, or that the certain structure is "indirectly" disposed on the other structure through another structure.

[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this patent, and cannot be understood as limiting the present invention.

[0023] For example, see Figure 1-8 , A Chinese herbal medicine drying device comprises a microwave generating assembly 1, an auxiliary heating assembly 2, a power transmission assembly 3, a shielding shell 4 and a main body support 5. The microwave generating assembly 1 comprises a hollow fixed shaft 11, at least three shielding microwave cavities 12 with annular fan-shaped outer arc openings and a microwave generator 13; the hollow fixed shaft 11 is mounted and fixed in the shielding shell 4, the shielding shell 4 is fixedly arranged on the main body support 5, a water vapor channel 41 is arranged on the shielding shell 4, and a shielding door 42 is arranged on one side of the length direction of the hollow fixed shaft 11; the microwave cavities 12 are evenly distributed along the circumference of the hollow fixed shaft 11; the microwave generator 13 is arranged on the inner arc of the shielding microwave cavity 12 with annular fan-shaped outer arc openings; the auxiliary heating assembly 2 is sleeved on the outside of the microwave generating assembly 1, and is rotatably connected to the hollow fixed shaft through bearings 21 on both sides; the power transmission assembly 3 is transmission-connected to the auxiliary heating assembly 2. The microwave cavity 12 is designed with at least three annular fan-shaped outer arc openings for shielding, and a microwave generator 13 is arranged on the inner arc of the annular fan toward the auxiliary heating component. The multi-chamber independent directional use of microwaves improves the microwave energy utilization rate and can dynamically adjust the microwave working mode by controlling the number of microwave generators 13 in operation to adapt to the drying rate at different stages. The hollow structure of the hollow fixed shaft 11 is used as a heat dissipation channel and a line arrangement channel.

[0024] Furthermore, the inner surface of the microwave cavity is randomly arranged with hemispherical depressions; thereby forming a non-uniform reflection surface on the inner surface of the microwave cavity; the edges and corners inside the microwave cavity are all rounded; the opening angle of the outer arc of the microwave cavity ring fan is greater than 60 degrees and less than 120 degrees. Microwaves are prone to form standing waves in a closed cavity, resulting in uneven energy distribution (hot spots and cold spots). The antinodes (energy peak areas) and nodes (energy valley areas) of the standing wave are alternately distributed, resulting in local overheating and underheating areas on the surface or inside of the drying material. For example, if an area with a high moisture content is at a node position, it is difficult for the moisture to evaporate effectively, and the antinode may cause carbonization of the material due to overheating, reducing energy efficiency. The standing wave energy is concentrated on the antinode, and the microwave energy in the node area is not fully utilized, resulting in a decrease in overall energy efficiency, especially for large or continuous microwave drying equipment. The hemispherical depressions disrupt the reflection path by scattering microwaves, destroying the regular distribution of the standing wave, so that the energy covers the reflection to the drying material more evenly.

[0025] The electromagnetic fields of adjacent microwave cavities 12 will be coupled through space or structural gaps, resulting in mode interference (such as frequency offset, mode splitting) and energy crosstalk. In order to further enhance the shielding effect of the microwave cavity 12 and reduce interference, an isolation cavity 14 is provided between adjacent microwave cavities 12; the isolation cavity 14 is a closed structure cavity filled with absorbing material. The absorbing material (such as carbon-based composite material, ferrite) can convert the electromagnetic waves leaking out of the shielded microwave cavity 12 into heat energy, further reducing the coupling strength between cavities, part of the heat energy is transferred into the auxiliary heat component to enhance the drying effect, and the other part of the heat energy is dissipated through the hollow structure of the hollow fixed shaft.

[0026] Ancient Chinese medical books (such as Leigong Paozhi Lun) emphasize the importance of ceramic utensils (such as casseroles and pottery jars) in the processing of Chinese medicinal materials, believing that they conform to the "earth nature" and can reconcile the properties of medicines, and are especially suitable for medicinal materials that need to be "fried in the earth" or "calcined". Further, the auxiliary heating component 2 includes a ceramic drum 22, and a ceramic box component 23 that is detachably fixed to the outside of the ceramic drum 22; the bearings 21 on both sides of the ceramic drum 22 are rotatably connected to the hollow fixed shaft 11; the ceramic box component 23 includes a number of low-porosity porous ceramic boxes 231, U-shaped positioning cards 232 and a flexible microwave shielding layer 233; the bottom of the positioning card 232 is riveted to the flexible microwave shielding layer 233 by non-metallic rivets 234, and the outside of the porous ceramic box 231 is provided with a clamping groove 235 corresponding to the positioning card; the porous ceramic box 231 is clamped and fixed to the flexible microwave shielding layer 233 by the positioning card 232. The present invention adopts low-porosity porous ceramics as the main body to construct a drying space. By adjusting the porosity of the ceramics (even if the porosity is low, a small amount of micropores are still retained), the local humidity can be controlled during the drying process. It is suitable for medicinal materials that need to be dried in stages and helps to astringe the medicinal properties. In addition, the thermal conductivity of low-porosity ceramics is better than that of high-porosity materials. Combined with the microwave heating characteristics, heat can be relatively quickly conducted from the inside of the medicinal material to the surface, reducing the temperature difference between the inside and outside, and avoiding local overheating or coking. The limited micropores inside the ceramics can guide the flow of hot air, promote moisture discharge, and assist heat conduction; at the same time, it avoids incomplete drying caused by uneven airflow in traditional drying.

[0027] The plurality of independent porous ceramic boxes 231 limit the movement space of the medicinal materials, further preventing the medicinal materials from being broken and falling off due to large-scale and multi-directional collision and friction after dehydration and drying, thereby affecting the quality of the medicinal materials.

[0028] To assist in optimizing the collection of dried Chinese medicinal materials, preferably, the porous ceramic box 231 is an open structure at one end; side guard plates 24 are provided at both axial ends of the ceramic drum 22 to form a relatively closed drying chamber for the porous ceramic box 231.

[0029] Furthermore, a collecting cloth assembly 6 is provided in the opening direction of the shielding door 42; the collecting cloth assembly 6 includes a bottom plate 61, a sliding plate 62, a collecting trough 63 and a splicing arch bridge 64; the right half of the splicing arch bridge 64 is fixedly provided on the main frame 5 in the shielding door 42, and the left half is fixedly provided on the sliding plate 62; the sliding plate 62 is slidably limitedly connected with the sliding limit groove 611 provided on the bottom plate 61 through a limit column 621. The above design enables the splicing arch bridge 64 to form a split-type slidable abutment curved surface, thereby providing a lapped lifting guide platform for the disassembly and assembly of the ceramic box assembly 23 on the outside of the ceramic drum 22, reducing the risk of the medicinal materials inside the ceramic box assembly 23 being scattered and the difficulty of disassembly and assembly.

[0030] Furthermore, the bottom of the bottom plate 61 on the same side as the opening end of the porous ceramic box 231 is hinged to the support leg 613 through a hinge shaft 612 along the length direction of the bottom plate, and a "L"-shaped material collection trough 63 is fixedly provided on the side of the bottom plate parallel to and close to the hinge shaft; one end of the material collection trough 63 is tilted downward; a slide 614 is fixedly provided below the side of the bottom plate 61 away from the material collection trough 63, and a slider 615 is limitedly slidably connected in the slide 614, and a rotating shaft 617 is rotatably sleeved on the outside of the fixed shaft 616 of the slider 615, and the rotating shaft 617 is fixedly connected to the power output end of the hydraulic lifting rod 618. The method of hinged on one side and powered lifting on the other side makes the material collection trough 63 in a relatively low position. Under the action of gravity, the dried medicinal materials in the porous ceramic box 231 will slide into the material collection trough 63 and be further collected.

[0031] Furthermore, a positioning hole 622 is provided on the sliding plate 62, and a limiting hole is provided on the bottom plate 61 opposite to the positioning hole 622; the sliding plate 62 is fixed relative to the bottom plate by a positioning pin 65 passing through the positioning hole 622 and the limiting hole.

[0032] Preferably, the flexible microwave shielding layer 233 is made of a steel wire shielding mesh mixed with "nylon 46 fiber" (PA46), a material that is resistant to long-term high temperatures. This mixed design takes advantage of the fact that "nylon 46 fiber" does not deform for a long time at high temperatures, and has the characteristics of good toughness and resilience, so that the flexible microwave shielding layer 233 simultaneously satisfies the characteristics of microwave shielding, high temperature tolerance, and breathability and can serve as a water vapor evacuation channel, which has unique advantages. The surface of the sliding plate 62 is a magnetic surface. The magnetic surface can provide attraction when the ceramic box assembly 23 is lifted by the hydraulic lifting rod 618, and relatively fix it; it can also allow the ceramic box assembly 23 to be stretched and laid on the surface of the sliding plate 62, reducing the curling of the flexible microwave shielding layer 233 due to toughness, which is more conducive to material collection and laying operations.

[0033] When in use, the Chinese medicinal materials to be dried are evenly loaded into the porous ceramic box 231 of the ceramic box assembly 23, and the loading amount is moderate, neither too full to affect the drying effect, nor too little to waste drying space. Open the shielding door 42, push the sliding plate 62 to drive the left half of the splicing arch bridge 64 to abut against the right half of the splicing arch bridge 64, and with the help of the curved surface design of the splicing arch bridge 64, the ceramic box assembly 23 is buckled and covered and fixed on the outside of the ceramic drum 22 to ensure a firm installation and avoid the ceramic box from loosening or falling off during the drying process. Close the shielding door 42, push the sliding plate 62 to drive the left half of the splicing arch bridge 64 to abut against the shielding door 42, and use the positioning pin 65 to pass through the corresponding positioning hole 622 and the limit hole to fix it relatively with the bottom plate 61, forming a secondary protection for the shielding door 42, and avoiding accidental opening and closing of the shielding door 42 during the operation of the equipment to cause a safety accident.

[0034] Then, the microwave generator 13 and the power transmission component 3 are started through the central control system. According to the characteristics of the Chinese medicinal materials, drying requirements, drying stages, moisture content changes and retention of effective ingredients, the appropriate microwave power, the number of microwave generators 13 in operation, the working time of the microwave generator 13 and the power transmission speed are dynamically adjusted to generate microwave energy and heat in the microwave cavity 12 to act on the Chinese medicinal materials together for drying.

[0035] The Chinese medicinal materials in the porous ceramic box 231 installed outside the ceramic drum 22 are tumbled in a small range to ensure that the Chinese medicinal materials are heated evenly, further improving the drying effect. The water vapor gradually and slowly escapes along the pores of the porous ceramic with low porosity, passes through the flexible microwave shielding layer 233, and enters the outside through the water vapor channel 41. When the Chinese medicinal materials reach the expected drying degree, the microwave generator 13 and the power transmission component 3 are turned off by the central control system to stop the drying process.

[0036] Next, open the shielding door 42, and with the assistance of the spliced ​​arch bridge 64, remove the ceramic box assembly 23 that is fixed to the outside of the ceramic drum 22 to the magnetic surface of the sliding plate 62, and start the hydraulic lifting rod 618. Under the action of the hydraulic lifting rod 618, the magnetic surface on the surface of the sliding plate 62 provides attraction when the ceramic box assembly 23 is lifted by the hydraulic lifting rod 618, so that the ceramic box assembly 23 is stretched and laid on the surface of the sliding plate 62, reducing the curling of the flexible microwave shielding layer 233, and facilitating the dried medicinal materials to slide into the collecting trough for collection and re-arranging of the ceramic box assembly 23.

[0037] Compared with the prior art, the present invention improves the utilization rate of microwave energy by combining the microwave generating assembly 1 and the auxiliary heating assembly 2, so that the medicinal materials can be evenly heated during the drying process, effectively solving the problems of low microwave energy utilization rate and uneven heating in the prior art. The design of the microwave cavity 12 in the microwave generating assembly enables the microwave to be more evenly distributed in the entire drying space. The porous ceramic box 231 structure with low porosity further reduces the microwave scattering loss. At the same time, the heat obtained by the heat transfer between the water vapor and the ceramic when the water vapor escapes is reversely and evenly conducted to the surface of the medicinal materials again by using the thermal conductivity of the ceramic, forming a dual drying mode of "internal microwave heating + external ceramic thermal conduction", accelerating the internal moisture migration to avoid local overheating or insufficient heating. The low porosity structure can also control the local humidity during the drying process, which is suitable for medicinal materials that need to be dried in stages, helps to converge the medicinal properties, further improves the drying efficiency and quality, and maximizes the retention of the effective ingredients of the medicinal materials. The hydraulic adjustment of the tilt angle, combined with the design of the sliding plate magnetically fixed ceramic box assembly and the collection trough, realizes the rapid collection of the dried medicinal materials, and facilitates the secondary re-feeding operation of the ceramic box assembly.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in the field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

[0039] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A Chinese medicinal material drying device, characterized in that: The invention comprises a microwave generating assembly, an auxiliary heating assembly, a power transmission assembly, a shielding shell and a main body support, wherein the microwave generating assembly comprises a hollow fixed shaft, at least three shielding microwave cavities with annular fan-shaped outer arc openings and a microwave generator; the hollow fixed shaft is mounted and fixed in the shielding shell, the shielding shell is fixedly arranged on the main body support, a water vapor channel is arranged on the shielding shell, and a shielding door is arranged on one side of the shielding shell along the length direction of the hollow fixed shaft; the microwave cavities are uniformly distributed along the circumference of the hollow fixed shaft; the microwave generator is arranged on the inner arc of the microwave cavity; the auxiliary heating assembly is sleeved on the outside of the microwave generating assembly, and is rotatably connected to the hollow fixed shaft through bearings on both sides; the power transmission assembly is transmission-connected to the auxiliary heating assembly.

2. A Chinese medicinal material drying device according to claim 1, characterized in that: The inner surface of the microwave cavity is randomly arranged with hemispherical depressions; the edges and corners inside the microwave cavity are all rounded; and the opening angle of the fan-shaped outer arc of the microwave cavity ring is greater than 60 degrees and less than 120 degrees.

3. A Chinese medicinal material drying device according to claim 2, characterized in that: An isolation cavity is arranged between adjacent microwave cavities; the isolation cavity is a closed structure cavity filled with absorbing material.

4. A Chinese medicinal material drying device according to claim 1, characterized in that: The auxiliary heating component includes a ceramic drum and a ceramic box component detachably fixed on the outside of the ceramic drum; the bearings on both sides of the ceramic drum are rotatably connected to the hollow fixed shaft; the ceramic box component includes a number of low-porosity porous ceramic boxes, a U-shaped positioning card and a flexible microwave shielding layer; the bottom of the positioning card is riveted to the flexible microwave shielding layer by non-metallic rivets, and a clamping groove corresponding to the positioning card is opened on the outside of the porous ceramic box; the porous ceramic box is clamped and fixed to the flexible microwave shielding layer by the positioning card.

5. A Chinese medicinal material drying device according to claim 4, characterized in that: The porous ceramic box is an open structure at one end; and side guard plates are provided at both axial ends of the ceramic rotating drum.

6. A Chinese medicinal material drying device according to claim 5, characterized in that: A material collecting and distributing assembly is extended in the opening direction of the shielding door; the material collecting and distributing assembly includes a bottom plate, a sliding plate, a material collecting trough and a splicing arch bridge; the right half of the splicing arch bridge is fixedly arranged on the main body bracket in the shielding door, and the left half is fixedly arranged on the sliding plate; the sliding plate is slidably limitedly connected with the sliding limit groove arranged on the bottom plate through a limit column.

7. A Chinese medicinal material drying device according to claim 6, characterized in that: The bottom of the bottom plate on the same side as the opening end of the porous ceramic box is hinged to the support leg through a hinge shaft, and an "L"-shaped material collection trough is fixedly provided on the side of the bottom plate close to the hinge shaft; one end of the material collection trough is tilted downward; a slide groove is fixedly provided below the side of the bottom plate away from the material collection trough, and a slider is connected to the slide groove in a limited sliding manner, and a rotating shaft is rotatably sleeved outside the fixed axis of the slider, and the rotating shaft is fixedly connected to the power output end of the hydraulic lifting rod.

8. The Chinese medicinal material drying device according to claim 6, characterized in that: The sliding plate is provided with a positioning hole, and a limiting hole is provided on the bottom plate opposite to the positioning hole; the sliding plate is fixed relative to the bottom plate by a positioning pin passing through the positioning hole and the limiting hole.

9. A Chinese medicinal material drying device according to claim 4 or 7, characterized in that: The flexible microwave shielding layer is made of a steel wire shielding mesh mixed with nylon 46.

10. A Chinese medicinal material drying device according to claim 9, characterized in that: The surface of the sliding plate is a magnetic attraction surface.

Images