A drying device for Chinese medicinal materials

Abstract

The present invention relates to the technical field of drying equipment, and specifically to a drying device for Chinese medicinal materials, comprising a mounting bracket, a drying cylinder being rotatably provided on the mounting bracket, the axis of the drying cylinder extending in a horizontal direction, the drying cylinder comprising an inner cylinder, a middle cylinder and an outer cylinder which are coaxial and fixedly arranged in sequence from the inside to the outside; the inner cylinder, the middle cylinder and the outer cylinder are all heat-insulating cylinders, the axis direction of the inner cylinder is set to be a front-to-back direction, the middle cylinder is a double-layer cylinder, the middle cylinder has a cavity arranged around its circumference, an air intake component is arranged in the cavity, the air intake component transports hot air to the inside of the middle cylinder, the hot air will enter the cavity of the middle cylinder after drying the material in the middle cylinder, a diversion component is slidably provided at the rear end of the middle cylinder, the diversion component distributes the hot air in the cavity of the middle cylinder to the inner cylinder and the outer cylinder according to the flow rate of the material in the inner cylinder and the outer cylinder, the greater the flow rate of the material, the more hot air is distributed, thereby improving the drying effect.

Description

Technical Field

[0001] The invention relates to the technical field of drying equipment, in particular to a drying device for Chinese medicinal materials. Background Art

[0002] In order to facilitate storage, Chinese medicinal materials usually need to be dried using a drying device to prevent mold growth and deterioration of the medicinal materials.

[0003] In the prior art, when drying Chinese herbal medicines continuously, a three-drum dryer is usually used, such as the one disclosed in the patent with the announcement number CN219328271U. When the dryer is working, the material and the hot air flow into the inner drum, the middle drum and the outer drum together, and the material is dried by making full use of the heat energy before being discharged. The drum part of the dryer is composed of three coaxial horizontally placed inner, middle and outer drums, which makes full use of the cross section of the drum. However, since the drum is not insulated, the temperature of the hot air gradually decreases as it flows, and the hot air has a poor drying effect on the material in the middle and outer drums, resulting in a high moisture content in the dried material. Summary of the invention

[0004] Based on this, it is necessary to provide a drying device for Chinese medicinal materials to address the technical problem that the current dryer has poor drying effect on the materials in the middle and outer drums.

[0005] The above purpose is achieved through the following technical solutions:

[0006] A drying device for Chinese medicinal materials, comprising a mounting bracket, a drying cylinder being rotatably provided on the mounting bracket, the axis of the drying cylinder extending in a horizontal direction, the drying cylinder comprising an inner cylinder, a middle cylinder and an outer cylinder which are coaxial and fixedly arranged in sequence from the inside to the outside; the inner cylinder, the middle cylinder and the outer cylinder are all heat-insulating cylinders, the axis direction of the inner cylinder is set to be a front-to-back direction, the material enters from the front end of the inner cylinder, flows through the middle cylinder, and finally flows out from the rear end of the outer cylinder; the middle cylinder is a double-layer cylinder, the middle cylinder has a cavity arranged around its circumference, an air intake component is arranged in the cavity, the air intake component transports hot air to the interior of the middle cylinder, the hot air will enter the cavity of the middle cylinder after drying the material inside the middle cylinder, a diversion component is slidably provided at the rear end of the middle cylinder, the diversion component distributes the hot air in the cavity of the middle cylinder to the inner cylinder and the outer cylinder according to the flow rate of the material in the inner cylinder and the outer cylinder, and the greater the flow rate of the material, the more hot air is distributed.

[0007] Furthermore, the air intake assembly includes an air intake pipe and an air intake plate, the middle cylinder includes an inner cylinder and an outer cylinder, the air intake plate is sealingly and slidingly matched with the outer wall of the inner cylinder to form an air supply cavity, the air intake pipe is connected with the air supply cavity, and the inner cylinder is provided with multiple rows of one-way air intake valves distributed in the front-to-back direction, when the one-way air intake valve rotates with the drying cylinder to correspond to the air supply cavity, the hot air in the air supply cavity enters the middle cylinder through the one-way air intake valve.

[0008] Furthermore, a first through hole is provided at the front end of the inner tube, and the first through hole is communicated with the cavity of the middle tube.

[0009] Furthermore, a first baffle is correspondingly provided at the rear ends of the inner cylinder and the middle cylinder, and the first baffle is connected to a first telescopic mechanism, which controls the first baffle to intermittently move along the axial direction of the drying cylinder, thereby controlling the flow of materials between the inner cylinder and the middle cylinder; a second baffle is correspondingly provided at the front ends of the middle cylinder and the outer cylinder, and the second baffle is connected to a second telescopic mechanism, which controls the second baffle to intermittently move along the axial direction of the drying cylinder, thereby controlling the flow of materials between the middle cylinder and the outer cylinder.

[0010] Furthermore, a fixed sealing plate is fixedly provided at the rear end of the middle tube, and the fixed sealing plate is a circular plate. The diameter of the fixed sealing plate is the same as the diameter of the outer tube of the middle tube, and the fixed sealing plate closes the rear end opening of the middle tube. The first telescopic mechanism is arranged on the fixed sealing plate, and the outer peripheral surface of the front end of the inner tube is provided with an annular fixed plate, and the second telescopic mechanism is arranged on the annular fixed plate.

[0011] Furthermore, a first opening is provided on the outer layer cylinder, and a second opening is provided on the inner layer cylinder, and the first opening and the second opening do not overlap in the radial direction of the drying cylinder; the first opening and the second opening are both located between the first baffle plate and the fixed sealing plate, and the diversion assembly includes a slider, which is located between the inner layer cylinder and the outer layer cylinder, and the slider can slide along the axial direction of the drying cylinder, thereby simultaneously controlling the opening size of the first opening and the second opening.

[0012] Furthermore, an isolation chamber is formed between the fixed sealing plate and the first baffle plate, and the diversion assembly also includes a sensing plate and a sensing rod, wherein the sensing plate is fixedly arranged on the slider, and the sensing plate extends from the first opening into the interior of the outer cylinder, and the sensing plate can be subjected to the thrust of the material in the outer cylinder; the sensing rod is arranged on the first baffle plate through the front and back, and one end of the sensing rod has a sensing surface, and the sensing surface extends into the inner cylinder for sensing the thrust of the material in the inner cylinder, and the other end of the sensing rod is located in the isolation chamber; the slider has an extended end extending from the second opening into the isolation chamber, and a hinged rod is hinged on the sealing fixed plate, and the hinged rod extends in the up and down directions, and the extended end of the slider and the sensing rod are respectively hinged at both ends of the hinged rod.

[0013] Furthermore, the hinged rod includes a telescopic plate hinged on the sealing fixed plate and two telescopic rods respectively located above and below the telescopic plate, the telescopic rods can slide along the telescopic plate, and the extended end of the slider and the sensing rod are respectively hinged to one telescopic rod.

[0014] Furthermore, a second through hole is provided at a position of the first baffle plate corresponding to the inner cylinder, and the second through hole allows the gas in the cavity to enter the inner cylinder through the isolation cavity. A swivel is rotatably provided on the second baffle plate, and the swivel corresponds to the cavity front and back, and the air inlet pipe is fixedly connected to the swivel.

[0015] Furthermore, the inner walls of the inner cylinder, the middle cylinder and the outer cylinder are all provided with auger blades, and when the drying cylinder rotates, the auger blades cause the material to move along the axial direction of the drying cylinder.

[0016] The beneficial effects of the present invention are:

[0017] The drying device for Chinese medicinal materials of the present invention transmits hot air to the middle cylinder first and then to the inner cylinder and the outer cylinder, so that the drying temperature of the middle cylinder is the highest, thereby obtaining materials with lower water content and improving the drying effect.

[0018] Secondly, the drying device for Chinese medicinal materials of the present invention can reasonably distribute hot air according to the flow rate of the materials in the outer cylinder and the inner cylinder. The greater the flow rate of the material, the more hot air is distributed, and the material can be dried evenly, thereby improving the drying effect.

[0019] Thirdly, in the drying device for Chinese medicinal materials of the present invention, hot air intermittently enters the interior of the middle cylinder, which can disperse the materials inside the middle cylinder, thereby improving the drying effect of the materials inside the middle cylinder.

[0020] Fourthly, in the drying device for Chinese medicinal materials of the present invention, the inner cylinder, the middle cylinder and the outer cylinder are all heat-insulating cylinders, and the movement of the first baffle and the second baffle can reduce the internal heat loss and further improve the drying effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a curve diagram of drying time and moisture content at different temperatures;

[0022] Figure 2 A schematic diagram of the three-dimensional structure of a drying device for Chinese medicinal materials provided by one embodiment of the present invention;

[0023] Figure 3 A side view of a drying device for Chinese medicinal materials provided by one embodiment of the present invention;

[0024] Figure 4 for Figure 3 Middle AA section view;

[0025] Figure 5 A schematic diagram of the three-dimensional structure of a drying drum in a drying device for Chinese medicinal materials provided in one embodiment of the present invention;

[0026] Figure 6 A side view of a drying drum in a drying device for Chinese medicinal materials provided by one embodiment of the present invention;

[0027] Figure 7 for Figure 6 Middle BB section view;

[0028] Figure 8 for Figure 7 A magnified view of the structure at D in the middle;

[0029] Fig. 9 for Figure 7 Enlarged view of the structure at E in the middle;

[0030] Fig.10 for Figure 7 A magnified view of the structure at F in the middle;

[0031] Fig.11 for Figure 7 A magnified view of the structure at G in the middle;

[0032] Fig.12 A cross-sectional view of a drying device for Chinese medicinal materials provided by one embodiment of the present invention;

[0033] Fig.13 for Fig.12 A magnified view of the structure at H in the middle;

[0034] Fig.14 for Fig.12 Enlarged view of the structure at position I in the middle.

[0035] in:

[0036] 110, mounting bracket; 111, first fixed bracket; 112, first rotating mechanism; 113, second fixed bracket; 114, second rotating mechanism; 115, third fixed bracket; 120, hot air exhaust cylinder; 121, hot air exhaust port; 122, feed port; 130, cold air exhaust cylinder; 131, exhaust mesh; 132, cold air exhaust port; 140, cooling output cylinder; 141, second gear ring; 142, fourth auger blade; 150, cold air inlet cylinder; 151, discharge port; 152, cold air inlet; 200, drying cylinder; 210, outer cylinder; 211, first gear ring; 212, first auger blade; 220, middle cylinder; 221, inner tube; 2211, one-way air inlet valve; 2212, second opening; 222, outer tube; 2221, first opening; 223, second auger blade; 224, first through hole; 225, fixed sealing plate; 226, first hydraulic cylinder; 227, second through hole; 228, first baffle; 230, inner tube; 231, annular fixed plate; 232, second hydraulic cylinder; 233, second baffle; 2331, swivel; 234, third auger blade; 241, slider; 242, induction plate; 243, extended end; 244, telescopic plate; 245, support rod; 246, hinged end; 247, induction rod; 248, induction surface; 250, air intake assembly; 251, air intake pipe; 252, condensate collecting pipe; 253, cavity; 254, air intake plate. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0039] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0040] Figure 1 The following is a curve chart showing the change in drying time and moisture content at different temperatures. In the two-thirds stage of drying, the effects of different temperatures on moisture content vary greatly, so ensuring high temperature in this stage is more helpful in improving the drying effect.

[0041] like Figures 2 to 14 As shown, a drying device for Chinese medicinal materials provided by an embodiment of the present invention is used for drying Chinese medicinal materials, which includes a mounting bracket 110, on which a first fixed bracket 111, a second fixed bracket 113 and a third fixed bracket 115 are provided, a hot air exhaust cylinder 120 is fixed on the first fixed bracket 111, a cold air exhaust cylinder 130 is fixed on the second fixed bracket 113, and a cold air intake cylinder 150 is fixed on the third fixed bracket 115. A first rotating mechanism 112 and a second rotating mechanism 114 are provided on the mounting bracket 110, a drying cylinder 200 is provided on the first rotating mechanism 112, and a cooling output cylinder 140 is provided on the second rotating mechanism 114. The hot air exhaust cylinder 120, the drying cylinder 200, the cold air exhaust cylinder 130, the cooling output cylinder 140, and the cold air intake cylinder 150 are arranged in sequence from front to back, and the two adjacent cylinders are slidably sealed.

[0042] The axis of the drying cylinder 200 extends in the horizontal direction, and the drying cylinder 200 includes an inner cylinder 230, a middle cylinder 220 and an outer cylinder 210 which are coaxial and fixed in sequence from the inside to the outside; the inner cylinder 230, the middle cylinder 220 and the outer cylinder 210 are all heat-insulating cylinders, and the axis direction of the inner cylinder 230 is set to the front-to-back direction. The hot air exhaust cylinder 120 is provided with a feed port 122 corresponding to the inner cylinder 230, and is provided with a hot air exhaust port 121 corresponding to the inner cylinder 230 and the outer cylinder 210, so that the hot air is recovered from the front after drying the material.

[0043] The upper side of the cold air exhaust cylinder 130 is provided with an exhaust mesh 131, and a cold air exhaust port 132 is provided corresponding to the exhaust mesh 131. The outer circumference of the drying cylinder 200 is provided with a first gear ring 211, and the outer circumference of the cooling output cylinder 140 is provided with a second gear ring 141. The first rotating mechanism 112 and the second rotating mechanism 114 are both motors, and the output ends of the motors are connected to driving gears, and the driving gears are respectively meshed with the first gear ring 211 and the second gear ring 141. The inner wall of the cooling output cylinder 140 is provided with a fourth auger blade 142, and the fourth auger blade 142 is used to transport the dried material. A cold air inlet port 152 is provided at the center of the cold air inlet cylinder 150, and the cold air inlet port 152 is used to transport cold air to the cooling output cylinder 140, so that the cold air cools the dried material, and then the cold air enters the exhaust mesh 131 and the cold air exhaust port 132 of the cold air exhaust cylinder 130 and flows out; a discharge port 151 is provided at the bottom of the cold air inlet cylinder 150, and the discharge port 151 is used for the cooled material to flow out.

[0044] The material enters the front end of the inner cylinder 230 from the feed port 122 of the hot air exhaust cylinder 120, then flows through the middle cylinder 220, and finally flows out from the rear end of the outer cylinder 210. After being cooled by the cold air exhaust cylinder 130 and the cooling output cylinder 140, it flows out from the discharge port 151 of the cold air inlet cylinder 150. The middle cylinder 220 of the drying cylinder 200 is a double-layer cylinder, and the middle cylinder 220 has a cavity 253 arranged around its circumference. An air intake component 250 is arranged in the cavity 253. The air intake component 250 transports hot air to the interior of the middle cylinder 220. The hot air dries the material inside the middle cylinder 220 and then enters the cavity 253 of the middle cylinder 220. A diversion component is slidably provided at the rear end of the middle cylinder 220. The diversion component distributes the hot air in the cavity 253 of the middle cylinder 220 to the inner cylinder 230 and the outer cylinder 210 according to the flow rate of the material in the inner cylinder 230 and the outer cylinder 210. The greater the flow rate of the material, the more hot air is distributed.

[0045] In one embodiment, the air intake assembly 250 includes an air intake pipe 251 and an air intake plate 254, the middle cylinder 220 includes an inner cylinder 221 and an outer cylinder 222, one side of the air intake plate 254 has an opening, the air intake plate 254 and the outer wall of the inner cylinder 221 are sealed and slidably matched to form an air supply cavity, the air intake pipe 251 is communicated with the air supply cavity, the inner cylinder 221 is provided with a plurality of rows of one-way air intake valves 2211 distributed along the front-to-back direction, when the one-way air intake valves 2211 rotate with the drying cylinder 200 to correspond to the air supply cavity, the hot air in the air supply cavity enters the middle cylinder 220 through the one-way air intake valves 2211. The hot air intermittently enters the interior of the middle cylinder 220 to impact the material, thereby improving the drying effect of the material in the middle cylinder 220.

[0046] In one embodiment, a first through hole 224 is disposed at the front end of the inner tube 221 , and the first through hole 224 is communicated with the cavity 253 of the middle tube 220 .

[0047] In one embodiment, the rear ends of the inner cylinder 230 and the middle cylinder 220 are provided with a first baffle 228, which is connected to a first telescopic mechanism, and the first telescopic mechanism controls the first baffle 228 to intermittently move along the axis direction of the drying cylinder 200, thereby controlling the flow of materials between the inner cylinder 230 and the middle cylinder 220; the front ends of the middle cylinder 220 and the outer cylinder 210 are provided with a second baffle 233, which is connected to a second telescopic mechanism, and the second telescopic mechanism controls the second baffle 233 to intermittently move along the axis direction of the drying cylinder 200, thereby controlling the flow of materials between the middle cylinder 220 and the outer cylinder 210. The first telescopic mechanism is a first hydraulic cylinder 226, and the second telescopic mechanism is a second hydraulic cylinder 232. When the first baffle 228 no longer blocks the rear end openings of the middle cylinder 220 and the inner cylinder 230, the middle cylinder 220 is connected to the inner cylinder 230. When the second baffle 233 no longer blocks the front end openings of the outer cylinder 210 and the middle cylinder 220, the middle cylinder 220 is connected to the outer cylinder 210. By providing the first baffle 228 and the second baffle 233, it is prevented that hot air flows between the inner cylinder 230, the middle cylinder 220 and the outer cylinder 210 when the material does not flow, which helps to maintain the temperature inside each cylinder.

[0048] In one embodiment, a fixed sealing plate 225 is fixedly provided at the rear end of the middle cylinder 220. The fixed sealing plate 225 is a circular plate. The diameter of the fixed sealing plate 225 is the same as the diameter of the outer cylinder 222 of the middle cylinder 220. The fixed sealing plate 225 closes the rear end opening of the middle cylinder 220. The first telescopic mechanism is arranged on the fixed sealing plate 225. The outer peripheral surface of the front end of the inner cylinder 230 is provided with an annular fixed plate 231. The second telescopic mechanism is arranged on the annular fixed plate 231.

[0049] In one embodiment, the outer layer cylinder 222 is provided with a first opening 2221, and the inner layer cylinder 221 is provided with a second opening 2212, and the first opening 2221 and the second opening 2212 do not overlap in the radial direction of the drying cylinder 200; the first opening 2221 and the second opening 2212 are both located between the first baffle 228 and the fixed sealing plate 225, and the diversion assembly includes a slider 241, and the slider 241 is located between the inner layer cylinder 221 and the outer layer cylinder 222, and the slider 241 can slide along the axial direction of the drying cylinder 200, thereby simultaneously controlling the opening size of the first opening 2221 and the second opening 2212. The first opening 2221 and the second opening 2212 are both rectangular, and the first opening 2221 is located in front of the second opening 2212, and the slider 241 is also rectangular, and the inner layer cylinder 221 and the outer layer cylinder 222 are provided with a slide groove, and the slider 241 slides along the slide groove. In the initial state, the slider 241 is located in the middle of the slide slot, so that the slider 241 covers half of the first opening 2221 and the second opening 2212. When the slider 241 slides forward, the opening of the first opening 2221 decreases and the opening of the second opening 2212 increases. When the slider 241 slides backward, the opening of the first opening 2221 increases and the opening of the second opening 2212 decreases.

[0050] In one embodiment, an isolation chamber is formed between the fixed sealing plate 225 and the first baffle plate 228, and the flow dividing assembly further comprises a sensing plate 242 and a sensing rod 247. The sensing plate 242 is fixedly arranged on the slider 241, and the sensing plate 242 extends from the first opening 2221 into the interior of the outer cylinder 210, and the sensing plate 242 can be pushed by the material in the outer cylinder 210; the sensing rod 247 is arranged on the first baffle plate 228 along the front and rear, and one end of the sensing rod 247 has There is a sensing surface 248, which extends into the inner cylinder 230 to sense the thrust of the material in the inner cylinder 230. The sensing surface 248 has the same force area as the sensing plate 242. The other end of the sensing rod 247 is located in the isolation chamber. The slider 241 has an extended end 243 extending from the second opening 2212 into the isolation chamber. A hinged rod is hinged on the fixed sealing plate 225, and the hinged rod extends in the up and down directions. The extended end 243 of the slider 241 and the sensing rod 247 are respectively hinged at both ends of the hinged rod.

[0051] In one embodiment, the hinged rod includes a telescopic plate 244 hinged on the fixed sealing plate 225 and two telescopic rods respectively located above and below the telescopic plate 244, the telescopic rods can slide along the telescopic plate 244, and the extended end 243 of the slider 241 and the sensing rod 247 are respectively hinged to one of the telescopic rods. The first end of the sensing rod 247 away from the sensing surface 248 is a hinged end 246, and the hinged end 246 is hinged to one of the telescopic rods. A support rod 245 is fixedly provided on the fixed sealing plate 225, and the telescopic plate 244 is hinged to the support rod 245.

[0052] In other embodiments, pressure sensors may be provided in both the outer cylinder 210 and the inner cylinder 230 , and the flow rates of the materials in the outer cylinder 210 and the inner cylinder 230 may be determined based on the data from the two pressure sensors, thereby controlling the movement of the slider 241 .

[0053] In one embodiment, the first baffle 228 is provided with a second through hole 227 at a position corresponding to the inner cylinder 230, and the second through hole 227 allows the gas in the cavity 253 to enter the inner cylinder 230 through the isolation cavity, and the second baffle 233 is rotatably provided with a swivel 2331, and the second baffle 233 is provided with an annular groove, and the swivel 2331 is rotatably arranged in the annular groove, and the swivel 2331 corresponds to the cavity 253 front and back, and the air inlet pipe 251 is fixedly connected to the swivel 2331. In this way, when the drying cylinder 200 rotates, the swivel 2331 and the air inlet pipe 251 remain stationary, so as to avoid interference between the drying cylinder 200 and the air inlet pipe 251.

[0054] By utilizing the lever principle, when the thrust of the material in the outer cylinder 210 sensed by the induction plate 242 is greater than the thrust of the material in the inner cylinder 230 sensed by the induction rod 247, the slider 241 will move backward, so that the opening of the first opening 2221 is increased and the opening of the second opening 2212 is decreased, so that most of the hot air in the cavity 253 of the middle cylinder 220 enters the outer cylinder 210 through the first opening 2221, and a small part enters the inner cylinder 230 through the second opening 2212 and the second through hole 227.

[0055] When the thrust of the material in the inner cylinder 230 sensed by the sensing rod 247 is greater than the thrust of the material in the outer cylinder 210 sensed by the sensing plate 242, according to the lever principle, when the force received by the lower side of the hinged rod is greater than the force received by the upper side of the hinged rod, the lower side of the hinged rod moves backward, while the upper side of the hinged rod moves forward, and the slider 241 slides forward, reducing the opening of the first opening 2221 and increasing the opening of the second opening 2212, so that most of the hot air in the cavity 253 of the middle cylinder 220 enters the inner cylinder 230 through the second opening 2212 and the second through hole 227, and a small part enters the outer cylinder 210 through the first opening 2221.

[0056] In one embodiment, the inner walls of the inner cylinder 230, the middle cylinder 220 and the outer cylinder 210 are all provided with auger blades, and when the drying cylinder 200 rotates, the auger blades cause the material to move along the axis direction of the drying cylinder 200. Specifically, the first auger blade 212 is provided on the inner wall of the outer cylinder 210, the second auger blade 223 is provided on the inner wall of the middle cylinder 220, and the third auger blade 234 is provided on the inner wall of the inner cylinder 230.

[0057] In one embodiment, the air intake assembly 250 further includes a condensed water collection pipe 252, which is arranged in parallel with the air intake pipe 251 and communicated with the cavity 253. The condensed water collection pipe 252 can guide the condensed water generated by cooling the hot air in the cavity 253 to prevent the moisture in the cavity 253 from affecting the drying of the material in the outer cylinder 210. A desiccant, absorbent cotton, etc. may also be arranged in the cavity 253 to absorb moisture.

[0058] In combination with the above embodiments, the use principle and working process of the embodiments of the present invention are as follows:

[0059] The material is conveyed to the inner cylinder 230 through the feed port 122, and the first rotating mechanism 112 is controlled to drive the drying cylinder 200 to rotate. The material enters the front end of the inner cylinder 230 through the feed port 122 of the hot air exhaust cylinder 120. When the material flows to the rear end of the inner cylinder 230, the first telescopic mechanism intermittently controls the first baffle 228 to no longer block the rear end openings of the middle cylinder 220 and the inner cylinder 230, so that the material can enter the rear end of the middle cylinder 220. When the material flows from the rear end of the middle cylinder 220 to the front end of the middle cylinder 220, the second telescopic mechanism intermittently controls the second baffle 233 to no longer block the front end openings of the middle cylinder 220 and the outer cylinder 210, so that the material can enter the front end of the outer cylinder 210, and finally flows out through the rear end of the outer cylinder 210. The outflowing material is cooled by the cold air exhaust cylinder 130 and the cooling output cylinder 140, and then flows out from the discharge port 151 of the cold air inlet cylinder 150. During the material conveying process, the sensing plate 242 senses the thrust of the material in the outer cylinder 210 , and the sensing rod 247 senses the thrust of the material in the inner cylinder 230 .

[0060] Fig.13 and Fig.14The arrow in the figure represents the flow direction of the hot air. While the material is being transported, the hot air is transported to the interior of the middle cylinder 220 through the air inlet pipe 251, and the hot air first enters the air supply cavity. During the rotation of the drying cylinder 200, the one-way air inlet valve 2211 on the middle cylinder 220 will intermittently correspond to the air inlet plate 254, so that the hot air intermittently enters the interior of the middle cylinder 220, which can disperse and dry the material in the middle cylinder 220. Then the hot air will flow forward through the first through hole 224 and enter the cavity 253 of the middle cylinder 220. When the thrust of the material in the outer cylinder 210 sensed by the induction plate 242 is greater than the thrust of the material in the inner cylinder 230 sensed by the induction rod 247, the forces on both sides of the hinge rod are unbalanced and rotate, causing the slider 241 to slide backward, the opening of the first opening 2221 to increase, and the opening of the second opening 2212 to decrease, so that most of the hot air in the cavity 253 of the middle cylinder 220 enters the outer cylinder 210 through the first opening 2221, and a small part enters the inner cylinder 230 through the second opening 2212 and the second through hole 227. When the thrust of the material in the outer cylinder 210 sensed by the induction plate 242 is less than the thrust of the material in the inner cylinder 230 sensed by the induction rod 247, the forces on both sides of the hinge rod are unbalanced and rotated, causing the slider 241 to slide forward, the opening of the first opening 2221 is reduced, and the opening of the second opening 2212 is increased, so that a small part of the hot air in the cavity 253 of the middle cylinder 220 enters the outer cylinder 210 through the first opening 2221, and most of it enters the inner cylinder 230 through the second opening 2212 and the second through hole 227. In this way, the greater the flow rate of the material, the more hot air is distributed. Finally, the hot air is extracted from the front end of the drying cylinder 200 through the hot air exhaust port 121 on the hot air exhaust cylinder 120 to achieve drying of the material. Then the cold air is controlled to enter from the cold air inlet 152 of the cold air inlet cylinder 150, and after passing through the cooling output cylinder 140, it flows out from the cold air exhaust port 132 of the cold air exhaust cylinder 130. The dried material is cooled by the cold air and then flows out from the discharge port 151 of the cold air inlet cylinder 150 .

[0061] The drying device for Chinese medicinal materials of the present invention makes the drying temperature of the middle cylinder 220 the highest by first conveying hot air to the middle cylinder 220 and then to the inner cylinder 230 and the outer cylinder 210, thereby obtaining materials with lower water content and improving the drying effect. At the same time, the hot air can be reasonably distributed according to the flow rate of the materials in the outer cylinder 210 and the inner cylinder 230. The larger the flow rate of the material, the more hot air is distributed, and the material can be dried evenly, thereby improving the drying effect.

[0062] Secondly, the hot air intermittently enters the interior of the middle cylinder 220, which can disperse the materials inside the middle cylinder 220, thereby improving the drying effect of the materials inside the middle cylinder 220; and the inner cylinder 230, the middle cylinder 220, and the outer cylinder 210 are all heat-insulating cylinders, and the movement of the first baffle 228 and the second baffle 233 can reduce the loss of internal heat and further improve the drying effect.

[0063] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A drying device for Chinese medicinal materials, characterized in that: The invention comprises a mounting bracket, on which a drying cylinder is rotatably arranged, the axis of which extends in the horizontal direction, and the drying cylinder comprises an inner cylinder, a middle cylinder and an outer cylinder which are coaxial and fixedly arranged in sequence from the inside to the outside; the inner cylinder, the middle cylinder and the outer cylinder are all heat-insulating cylinders, and the axis direction of the inner cylinder is set to be the front-to-back direction, and the material enters from the front end of the inner cylinder, flows through the middle cylinder, and finally flows out from the rear end of the outer cylinder; the middle cylinder is a double-layer cylinder, and the middle cylinder has a cavity arranged around the circumference thereof, and an air intake component is arranged in the cavity, and the air intake component conveys hot air to the inside of the middle cylinder, and the hot air is discharged to the middle cylinder. After drying, the internal material will enter the cavity of the middle cylinder. The rear end of the middle cylinder is slidably provided with a diversion component. The diversion component distributes the hot air in the cavity of the middle cylinder to the inner cylinder and the outer cylinder according to the flow rate of the material in the inner cylinder and the outer cylinder. The greater the flow rate of the material, the more hot air is distributed. The air intake component includes an air intake pipe and an air intake plate. The middle cylinder includes an inner cylinder and an outer cylinder. The air intake plate is sealed and slidably matched with the outer wall of the inner cylinder to form an air supply cavity. The air intake pipe is connected to the air supply cavity. The inner cylinder is provided with multiple rows of one-way air intake valves distributed in the front-to-back direction. A first through hole is provided at the front end of the inner cylinder, and the first through hole is connected to the cavity of the middle cylinder. A first baffle is slidably provided at the rear ends of the inner cylinder and the middle cylinder, and a fixed sealing plate is fixedly provided at the rear end of the middle cylinder, and the fixed sealing plate closes the rear end opening of the middle cylinder. A first opening is provided on the outer cylinder, and a second opening is provided on the inner cylinder, and the first opening and the second opening do not overlap in the radial direction of the drying cylinder; the first opening and the second opening are both located between the first baffle and the fixed sealing plate, the diverter assembly includes a slider, the slider is located between the inner cylinder and the outer cylinder, the slider can slide along the axial direction of the drying cylinder, and thus simultaneously control the opening size of the first opening and the second opening, the diverter assembly also includes a sensing plate and a sensing rod, the sensing plate is fixedly provided on the slider, the sensing plate extends from the first opening into the interior of the outer cylinder, and the sensing plate can be subjected to the thrust of the material in the outer cylinder; the sensing rod is arranged on the first baffle through the front and back, one end of the sensing rod has a sensing surface, and the sensing surface extends into the inner cylinder for sensing the thrust of the material in the inner cylinder, and a hinged rod is connected between the sensing rod and the slider.

2. The drying device for Chinese medicinal materials according to claim 1, characterized in that: When the one-way air inlet valve rotates with the drying drum to correspond to the air supply cavity, the hot air in the air supply cavity enters the middle drum through the one-way air inlet valve.

3. The drying device for Chinese medicinal materials according to claim 2, characterized in that: The first baffle is connected to a first telescopic mechanism, which controls the first baffle to intermittently move along the axial direction of the drying cylinder, thereby controlling the flow of materials between the inner cylinder and the middle cylinder; the front ends of the middle cylinder and the outer cylinder are correspondingly provided with second baffles, which are connected to a second telescopic mechanism, which controls the second baffle to intermittently move along the axial direction of the drying cylinder, thereby controlling the flow of materials between the middle cylinder and the outer cylinder.

4. The drying device for Chinese medicinal materials according to claim 3, characterized in that: The fixed sealing plate is a circular plate, the diameter of which is the same as the diameter of the outer layer of the middle tube. The first telescopic mechanism is arranged on the fixed sealing plate, the front end outer circumferential surface of the inner tube is provided with an annular fixed plate, and the second telescopic mechanism is arranged on the annular fixed plate.

5. The drying device for Chinese medicinal materials according to claim 4, characterized in that: An isolation cavity is formed between the fixed sealing plate and the first baffle, and the end of the sensing rod away from the sensing surface is located in the isolation cavity; the slider has an extended end extending from the second opening into the isolation cavity, the middle part of the hinged rod is hinged on the sealing fixed plate, the hinged rod extends in the up and down directions, and the extended end of the slider and the sensing rod are respectively hinged on both ends of the hinged rod.

6. The drying device for Chinese medicinal materials according to claim 5, characterized in that: The hinged rod comprises a telescopic plate hinged on the sealing fixed plate and two telescopic rods respectively located above and below the telescopic plate. The telescopic rods can slide along the telescopic plate. The extended end of the slider and the sensing rod are respectively hinged to one telescopic rod.

7. The drying device for Chinese medicinal materials according to claim 5, characterized in that: A second through hole is provided at a position of the first baffle plate corresponding to the inner cylinder, and the second through hole allows the gas in the cavity to enter the inner cylinder through the isolation cavity. A swivel is rotatably provided on the second baffle plate, and the swivel corresponds to the front and back of the cavity, and the air inlet pipe is fixedly connected to the swivel.

8. The drying device for Chinese medicinal materials according to claim 2, characterized in that: The inner walls of the inner cylinder, the middle cylinder and the outer cylinder are all provided with auger blades. When the drying cylinder rotates, the auger blades cause the material to move along the axial direction of the drying cylinder.

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