Uniform drying equipment for radix paeoniae alba decoction pieces
By using a multi-layer conveyor belt and a negative pressure exhaust device in the dryer, the problems of cracking and dust in white peony slices during the drying process were solved, achieving uniform drying and clean production of white peony slices.
Patent Information
- Application Number
- CN202511056100.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-30
- Publication Date
- 2025-11-11
AI Technical Summary
During the drying process of white peony root slices, the multiple conveyor belts of the belt dryer cause the slices to break and generate dust, affecting product quality and subsequent processing.
The system uses a multi-layer conveyor belt with a breathable belt body and a negative pressure extraction device. It adsorbs white peony slices through air pores and forms negative pressure to ensure uniform drying of the slices and removal of dust.
This improved the drying uniformity and integrity of white peony slices, reduced breakage and dust generation, and ensured the cleanliness and quality of the product.
Smart Images
Figure CN120926718A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of white peony drying, and more particularly to a uniform drying device for white peony slices. Background Technology
[0002] White peony root is processed into medicinal slices through washing, slicing, and drying. The drying process plays a crucial role in the quality of white peony root slices. Currently, belt dryers are commonly used to dry white peony root slices. Belt dryers use multi-layer conveyor belts to conduct the white peony root slices in a circuitous manner. During the conduction process, hot air dries the white peony root slices, which has the advantages of good drying uniformity and less loss of effective ingredients.
[0003] During the drying process of white peony root slices in a belt dryer, the upper conveyor belt throws the white peony root slices to the lower conveyor belt, which can easily cause the dried slices to break. This results in a high proportion of broken pieces, which reduces the quality of the white peony root slices. At the same time, the dried broken pieces can easily generate dust, which has an adverse effect on subsequent packaging and sales. Summary of the Invention
[0004] To overcome the shortcomings of existing technologies, the purpose of this invention is to provide a uniform drying device for white peony slices, which solves the problem that the multi-layer conveyor belt of a belt dryer, which transmits white peony slices in a scattering manner, easily generates broken pieces and dust.
[0005] To address the problems of the prior art, the technical solution of the present invention is as follows: A device for uniformly drying white peony root slices includes a drying chamber. Multiple layers of conveyor belts are installed inside the drying chamber, and these conveyor belts guide the white peony root slices from top to bottom in a meandering manner. Each conveyor belt includes an infeed roller and an outlet roller. A permeable belt is installed outside the infeed and outlet rollers, guiding the white peony root slices from the infeed roller to the outlet roller. The outlet roller has a hollow chamber inside, and several pores are evenly distributed on its surface, penetrating the hollow chamber. One end of the outlet roller is connected to a negative pressure extraction device. The negative pressure extraction device draws air to create a negative pressure in the hollow chamber, causing the pores to adsorb the white peony root slices on the surface of the permeable belt.
[0006] Preferably, the diameter of the discharge belt roller is larger than the diameter of the feed belt roller, the feed belt rollers and discharge belt rollers of adjacent guide conveyor belts are arranged in opposite directions, and the shaft of the discharge belt roller is connected to the motor via a belt.
[0007] Preferably, pressure rollers are symmetrically arranged on both sides of the material-facing direction of the discharge belt roller, and the pressure rollers press down on both sides of the ventilated belt body, so that the ventilated belt body at the material-facing part of the discharge belt roller forms an upward slope.
[0008] Preferably, the pressure roller is connected to the support of the discharge belt roller shaft via a tensioning frame. The tensioning frame includes a torsion frame, the middle part of which rotates coaxially with the shaft of the discharge belt roller. The pressure roller is rotatably mounted on the top of the torsion frame. A linear groove is provided at the bottom of the torsion frame. A positioning block is rotatably mounted on the surface of the support. A pull rod passes through the positioning block and the linear groove. A nut is threaded to the end of the pull rod, and the nut abuts against the torsion frame via a spring.
[0009] Preferably, the pressure roller is in extrusive contact with the discharge belt roller.
[0010] Preferably, the breathable belt body includes a breathable mesh belt with rubber strips on both sides. The surfaces of the feed roller, discharge roller, and pressure roller all have annular grooves, and the rubber strips are inserted into the annular grooves.
[0011] Preferably, an air hood is provided on the inner side of the discharge belt roller, with the opening of the air hood pointing upwards toward the air-permeable belt.
[0012] Preferably, the feed roller of the lower guide conveyor belt protrudes beyond the discharge roller of the upper guide conveyor belt, so that the heads and tails of the adjacent guide conveyor belts are staggered. The dryer housing is provided with a guide plate, which is inclined and points towards the feed end of the lower guide conveyor belt.
[0013] Preferably, the negative pressure air extraction device includes a negative pressure air pump and a dust filter. The dust filter includes a sealed box with a filter plate inside. An air inlet and an exhaust outlet are respectively provided at the top and bottom of the sealed box. The air inlet is connected to the discharge belt roller through a pipe, and the exhaust outlet is connected to the air inlet of the negative pressure air pump.
[0014] Preferably, the filter plate has multiple layers, with the filtration accuracy increasing from top to bottom. The filter plates are connected as one unit by a connecting frame, and the edges of the filter plates slide to fit the sealing box. A pressure sensor is installed between the bottommost filter plate and the bottom of the sealing box.
[0015] Compared with the prior art, the advantages of the present invention are as follows: 1. The present invention has a plurality of air holes evenly arranged on the surface of the discharge belt roller. The white peony slices are adsorbed by the air holes and rotated around the discharge belt roller to be conducted to the lower guide conveyor belt. This ensures that the white peony slices are fully turned over and conducted, improving the uniformity of drying. Compared with the traditional method of direct discharge, the adsorption and conduction of white peony slices can reduce the impact force generated by the free discharge of white peony slices, avoid the white peony slices from breaking, and ensure the integrity of the slices after drying. In addition, the air suction of the air holes can remove the dust in the white peony slices, making the dried white peony slices cleaner.
[0016] 2. In this invention, the pressure roller presses down on the ventilated belt, causing the ventilated belt at the material receiving part of the discharge belt roller to form an upward slope. The upward slope of the ventilated belt causes the bottom layer of white peony slices to be adsorbed and carried downward in a circular motion along the ventilated belt. The upper layer of white peony slices slide backward due to the slope and wait to be adsorbed and carried downward, reducing the probability of the white peony slices being discharged freely. Attached Figure Description
[0017] Figure 1 This is one of the overall structural schematic diagrams of the present invention.
[0018] Figure 2 This is the second schematic diagram of the overall structure of the present invention.
[0019] Figure 3 This is a schematic diagram of the internal structure of the dryer housing of the present invention.
[0020] Figure 4 This is a schematic diagram of the distribution of adjacent material conveyor belts according to the present invention.
[0021] Figure 5 This is a schematic diagram of the pressure roller pressing down on the ventilated belt to form an uphill slope, according to the present invention.
[0022] Figure 6 This is a schematic diagram of the tensioning frame structure of the present invention.
[0023] Figure 7 This is a schematic diagram of the dust filtration device of the present invention.
[0024] Attached reference numerals: 1. Dryer housing; 11. Feed inlet; 12. Discharge outlet; 2. Material guiding conveyor belt; 21. Air-permeable belt body; 211. Air-permeable mesh belt; 212. Rubber belt strip; 22. Feed roller; 23. Discharge roller; 24. Air holes; 3. Negative pressure air pump; 4. Dust filtration device; 41. Sealed box; 42. Filter plate; 43. Air inlet; 44. Exhaust port; 45. Connecting frame; 46. Pressure sensor; 5. Electric motor; 6. Tensioner; 61. Torsion frame; 62. Positioning block; 63. Linear groove; 64. Tie rod; 7. Guide plate; 8. Wind shield; 9. Pressure roller. Detailed Implementation
[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.
[0026] Equipment for uniformly drying white peony root slices, such as Figure 1 , Figure 2 As shown, the dryer includes a dryer housing 1. The dryer housing 1 has a feed inlet 11 on the top left side and a discharge outlet 12 on the bottom right side. The dryer housing 1 is equipped with a hot air system inside and a dehumidification system on the top. These are all existing technologies and will not be described in detail here.
[0027] like Figure 3 As shown, multiple layers of conveyor belts 2 are stacked inside the dryer housing 1. The feeding end of the uppermost conveyor belt 2 is located at the feeding port 11, and the discharging end of the lowermost conveyor belt 2 is located at the discharging port 12. The conveying directions of adjacent conveyor belts 2 are opposite. The feeding end of the lower conveyor belt 2 protrudes from the discharging end of the upper conveyor belt 2, so that the heads and tails of adjacent conveyor belts 2 are staggered.
[0028] like Figure 2 , Figure 4 As shown, the conveyor belt 2 includes a feed roller 22 and a discharge roller 23. The feed roller 22 and the discharge roller 23 are externally connected to a breathable belt body 21. Both the feed roller 22 and the discharge roller 23 are rotatably supported by a bracket. The feed roller 22 is located at the feed end of the conveyor belt 2, and the discharge roller 23 is located at the discharge end of the conveyor belt 2. The motor 5 is installed on the top of the dryer housing 1. The output shaft of the motor 5 is connected to a shaft of the discharge roller 23 through a toothed belt or chain drive. The motor 5 drives the discharge roller 23 to rotate, so that the breathable belt body 21 conveys the white peony slices from the feed roller 22 to the discharge roller 23.
[0029] like Figure 5 As shown, the discharge belt roller 23 has a hollow cavity inside. The non-drive shaft of the discharge belt roller 23 is a shaft tube, which connects to the hollow cavity of the discharge belt roller 23 and rotates out of the dryer housing 1. The shaft tube of the discharge belt roller 23 is connected to an external negative pressure suction device through a rotary joint. Several through air holes 24 are evenly distributed on the surface of the discharge belt roller 23, and the air holes 24 penetrate the hollow cavity of the discharge belt roller 23.
[0030] White peony slices are placed on the surface of the topmost conveyor belt 2 through the inlet 11. All conveyor belts 2 are driven to run by the motor 5. Due to the reverse transmission of adjacent conveyor belts 2, the white peony slices are transmitted from top to bottom in a detour. During the transmission process, hot air dries the white peony slices and finally discharges them from the outlet 12. During the process of conveying white peony slices on the conveyor belt 2, the negative pressure suction device is activated to extract air from the inside of the discharge roller 23, creating a negative pressure in the hollow chamber of the discharge roller 23. The air holes 24 have an air suction effect. When the white peony slices are conveyed to the discharge end by the breathable belt body 21, they are adsorbed by the air holes 24 and adhered to the surface of the breathable belt body 21. The breathable belt body 21 drives the white peony slices to rotate downward around the discharge roller 23. When the breathable belt body 21 is conveyed to the bottom and separates from the discharge roller 23, the white peony slices fall onto the surface of the lower conveyor belt 2. The adsorption-type conduction of white peony slices can ensure that the white peony slices are fully turned over and conducted, improving the uniformity of drying of the white peony slices. Secondly, the adsorption and conduction of white peony slices, compared to the traditional method of direct discharge, can reduce the impact force generated by the free discharge of white peony slices, avoid the white peony slices from breaking, and ensure the integrity of the slices after drying. In addition, the pores 24 allow air to be drawn out, which can remove dust from the white peony root slices, making the dried white peony root slices cleaner.
[0031] like Figure 4 As shown, the diameter of the discharge roller 23 is larger than that of the feed roller 22. The feed roller 22 and discharge roller 23 of the adjacent guide conveyor belt 2 are arranged in opposite directions, so that the bottom of the upper discharge roller 23 is closer to the lower ventilated belt 21, further reducing the drop height and ensuring that the slices will not break.
[0032] like Figure 5 , Figure 6 As shown, two pressure rollers 9 are symmetrically arranged on both sides of the material-facing direction of the discharge belt roller 23. The pressure rollers 9 are connected to the support through the tensioning frame 6, keeping the pressure rollers 9 pressing down on both sides of the ventilated belt body 21, so that the ventilated belt body 21 at the material-facing part of the discharge belt roller 23 forms an upward slope. The white peony slices on the surface of the breathable belt 21 are stacked. The bottom white peony slices are adsorbed and carried downward in a ring by the breathable belt 21 due to the upward slope of the breathable belt 21. The upper white peony slices slide backward due to the slope and wait to be adsorbed and carried downward, reducing the probability of the white peony slices freely flowing downward.
[0033] like Figure 3 , Figure 4 As shown, during the process of conveying white peony slices, a small number of white peony slices will inevitably be discharged directly without being adsorbed. Therefore, a guide plate 7 is set inside the dryer housing 1. The guide plate 7 is tilted and points towards the feed end of the lower conveyor belt 2. The guide plate 7 guides the white peony slices that are discharged directly to smoothly enter the feed end of the lower conveyor belt 2.
[0034] like Figure 5As shown, a wind hood 8 is provided on the inner side of the discharge belt roller 23. The wind hood 8 is fixed to the support on both sides. The opening of the wind hood 8 points upward to the air-permeable belt 21. The inner area of the discharge belt roller 23 is an empty area. The suction force generated by the air holes 24 in this area is relatively dispersed. The suction force at the top opening of the wind hood 8 is gathered to cover this area, thereby improving the adsorption efficiency of dust in the white peony slices.
[0035] like Figure 6 As shown, the breathable belt body 21 includes a breathable mesh belt 211, with rubber strips 212 on both sides of the breathable mesh belt 211. The surfaces of the feed roller 22, the discharge roller 23, and the pressure roller 9 all have annular grooves. The rubber strips 212 are inserted into the annular grooves. In addition, the inner pressure roller 9 is in contact with the discharge roller 23, so that the feed roller 22, the discharge roller 23, and the pressure roller 9 can stably conduct the breathable belt body 21.
[0036] The pressure roller 9 can be adjusted to compress the breathable belt 21 via the tensioning frame 6. The specific operation is as follows: like Figure 6 As shown, the tensioning frame 6 includes a torsion frame 61. The middle part of the torsion frame 61 rotates coaxially with the shaft of the discharge belt roller 23. The pressure roller 9 is rotatably mounted on the top of the torsion frame 61. A linear groove 63 is provided in the lower part of the torsion frame 61. A positioning block 62 is rotatably mounted on the surface of the support. The tail of the pull rod 64 has a hexagonal end block. The front end of the pull rod 64 passes through the positioning block 62 and the linear groove 63. The hexagonal end block is blocked by the positioning block 62. A nut is threadedly connected to the front end of the pull rod 64. The nut abuts against the torsion frame 61 through a spring. By rotating the nut to compress the spring, a thrust is applied to the torsion frame 61, causing the torsion frame 61 to rotate. This is used to adjust the pressure of the pressure roller 9 on the breathable belt 21, thereby adjusting the slope angle of the breathable belt 21 and also adjusting the tension of the breathable belt 21.
[0037] like Figure 1 , Figure 7 As shown, the negative pressure exhaust device includes a negative pressure air pump 3 and a dust filter 4. Both the negative pressure air pump 3 and the dust filter 4 are installed outside the dryer housing 1. The dust filter 4 includes a sealed box 41 with a cylindrical inner cavity. The upper and lower parts of the sealed box 41 are respectively provided with an air inlet 43 and an exhaust port 44. The air inlet 43 is connected to the shaft tube of the discharge belt roller 23 through a pipe and a rotary joint. The exhaust port 44 is connected to the air inlet end of the negative pressure air pump 3. A filter plate 42 is provided inside the sealed box 41. When the negative pressure air pump 3 is turned on, air is drawn into the sealed box 41, creating a negative pressure inside the sealed box 41. Through the pipeline connection, a negative pressure is created inside the discharge belt roller 23. The gas and dust drawn in by the air hole 24 are introduced into the sealed box 41 through the pipeline. The dust in the gas is filtered through the filter plate 42, and the gas is discharged through the negative pressure air pump 3, thus realizing the collection and treatment of dust and preventing dust from entering the workshop environment.
[0038] like Figure 7 As shown, the filter plate 42 has multiple layers, with the filtration accuracy increasing from top to bottom, achieving step-by-step filtration of the gas. The filter plates 42 are connected as one unit by the connecting frame 45. The edge of the filter plate 42 is slidably adapted to the sealing box 41. A pressure sensor 46 is installed between the bottom filter plate 42 and the bottom of the sealing box 41. The pressure sensor 46 is connected to an indicator device through a controller. As dust accumulates on the surface of the filter plate 42, the permeability of the filter plate 42 gradually decreases, and the pressure applied by the filter plate 42 to the pressure sensor 46 gradually increases. When the pressure sensor 46 detects that the pressure exceeds the set value, it indicates that the filter plate 42 is severely clogged. The indicator device prompts the staff to clean the filter plate 42 in time.
[0039] 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.
Claims
1. A device for uniformly drying white peony root slices, comprising: The dryer housing (1) is equipped with a multi-layer conveyor belt (2) inside the dryer housing (1). The multi-layer conveyor belt (2) conducts white peony slices from top to bottom in a meandering manner. The conveyor belt (2) includes a feeding roller (22) and a discharging roller (23). The external conduction of the feeding roller (22) and the discharging roller (23) is provided with a breathable belt (21). The breathable belt (21) conducts white peony slices from the feeding roller (22) to the discharging roller (23). The discharging roller (23) has a hollow cavity inside. Several air holes (24) that penetrate the hollow cavity are evenly distributed on the surface of the discharging roller (23). One end of the discharging roller (23) is connected to a negative pressure suction device. The negative pressure suction device draws air to form a negative pressure in the hollow cavity. The air holes (24) adsorb the white peony slices on the surface of the breathable belt (21).
2. The equipment for uniformly drying white peony root slices according to claim 1, characterized in that, The diameter of the discharge roller (23) is larger than that of the feed roller (22). The feed roller (22) and discharge roller (23) of the adjacent guide conveyor belt (2) are arranged in opposite directions. The shaft of the discharge roller (23) is connected to the motor (5) via a belt.
3. The equipment for uniformly drying white peony root slices according to claim 2, characterized in that, Pressure rollers (9) are symmetrically arranged on both sides of the material-facing direction of the discharge belt roller (23). The pressure rollers (9) press down on both sides of the ventilated belt (21), so that the ventilated belt (21) at the material-facing part of the discharge belt roller (23) forms an upward slope.
4. The equipment for uniformly drying white peony slices according to claim 3, characterized in that, The pressure roller (9) is connected to the support of the shaft of the discharge belt roller (23) through the tensioning frame (6). The tensioning frame (6) includes a torsion frame (61). The middle part of the torsion frame (61) rotates coaxially with the shaft of the discharge belt roller (23). The pressure roller (9) is rotatably mounted on the top of the torsion frame (61). A linear groove (63) is provided in the lower part of the torsion frame (61). A positioning block (62) is rotatably mounted on the surface of the support. A pull rod (64) passes through the positioning block (62) and the linear groove (63). A nut is threadedly connected to the end of the pull rod (64). The nut abuts against the torsion frame (61) through a spring.
5. The equipment for uniformly drying white peony slices according to claim 4, characterized in that, The pressure roller (9) is in extrusion contact with the discharge belt roller (23).
6. The equipment for uniformly drying white peony slices according to claim 3, characterized in that, The breathable belt body (21) includes a breathable mesh belt (211), and rubber strips (212) are provided on both sides of the breathable mesh belt (211). The surfaces of the feed roller (22), discharge roller (23), and pressure roller (9) are all provided with annular grooves, and the rubber strips (212) are inserted into the annular grooves.
7. The equipment for uniformly drying white peony slices according to claim 1, characterized in that, The inner side of the discharge belt roller (23) is provided with a wind hood (8), and the opening of the wind hood (8) is upward pointing to the air-permeable belt (21) above.
8. The equipment for uniformly drying white peony slices according to claim 1, characterized in that, The feed roller (22) of the lower guide conveyor belt (2) protrudes outward from the discharge roller (23) of the upper guide conveyor belt (2), so that the adjacent guide conveyor belts (2) are staggered. The dryer box (1) is provided with a guide plate (7), which is inclined towards the feed end of the lower guide conveyor belt (2).
9. The equipment for uniformly drying white peony slices according to claim 1, characterized in that, The negative pressure air extraction device includes a negative pressure air pump (3) and a dust filter (4). The dust filter (4) includes a sealed box (41), a filter plate (42) is provided inside the sealed box (41), and an air inlet (43) and an exhaust port (44) are respectively provided at the upper and lower parts of the sealed box (41). The air inlet (43) is connected to the discharge belt roller (23) through a pipe, and the exhaust port (44) is connected to the air inlet end of the negative pressure air pump (3).
10. The uniform drying equipment for white peony slices according to claim 9, characterized in that, The filter plate (42) is provided with multiple layers. The filtration accuracy of the filter plate (42) increases from top to bottom. The filter plate (42) is connected as a whole by a connecting frame (45). The edge of the filter plate (42) is slidably adapted to the sealing box (41). A pressure sensor (46) is provided between the bottom filter plate (42) and the bottom of the sealing box (41).