Hot air circulation oven and preparation process of Phellodendron chinense eight-flavor tablets

Abstract

The present invention provides a hot air circulation oven and a preparation process of Huangbo Bawei tablets, the hot air circulation oven comprising: a drying box, a lifting device, an air guide support, a valve plate and a rotating device; an air inlet channel, a drying chamber and an exhaust channel are arranged inside the drying box, the air inlet channel is connected with the drying chamber through a first air inlet and a second air inlet, the exhaust channel is connected with the drying chamber through an air outlet, an exhaust port is provided on the drying box, and the exhaust port is connected with the exhaust port; the rotating device is installed on the drying box, wherein the material box is detachably installed at the output end of the rotating device. The hot air circulation oven provided by the present invention drives the material box to swing back and forth through the rotating device, so that the material rolls, thereby realizing automatic turning of the material, and adjusting the flow direction of the hot air flow to realize blowing to the material from multiple directions, thereby improving the drying efficiency of the material.

Description

Technical Field

[0001] The invention relates to the technical field of hot air circulation ovens, in particular to a hot air circulation oven and a preparation process of phellodendron chinense eight-flavor tablets. Background Art

[0002] Hot air circulation oven can be used for heating and drying of particles in the pharmaceutical industry. The particles to be dried are placed in a tray in the oven, and then horizontal hot air is provided in the oven so that the hot air contacts the particles in the tray for drying. After the preset drying time, the particles in the tray need to be turned over to improve the uniformity and efficiency of drying.

[0003] In the prior art, workers are usually required to wear heat-insulating clothing, open the oven door, and use handheld tools to turn over the particles in the material tray. This method requires opening the oven door, which easily causes heat loss and is not conducive to energy saving. In addition, it has high requirements on personnel safety protection and operation, and consumes manpower.

[0004] Therefore, it is necessary to provide a new hot air circulation oven to solve the above-mentioned technical problems. Summary of the invention

[0005] The invention provides a hot air circulation oven, which solves the technical problem in the prior art that the turning process of the hot air circulation oven is not conducive to energy saving and consumes manpower.

[0006] In order to solve the above technical problems, the present invention provides a hot air circulation oven, comprising: a drying box, a lifting device, an air guide support, a material holding box, a valve plate and a rotating device; the drying box comprises a box body and an inner frame, and the inner frame is installed in the box body;

[0007] The lifting device includes a lifting cylinder, a driving shaft and a support plate, wherein the lifting cylinder is installed on the box body, the driving shaft is connected to the lifting end of the lifting cylinder, and the driving shaft passes through the inner frame and is connected to the support plate;

[0008] The air guide support member includes an air guide box and an L-shaped block, wherein the air guide box is supported on the support plate, and one end of the air guide box is open, and one end of the L-shaped block is connected to the air guide box;

[0009] A material holding box, the material holding box is supported on the top box opening of the air guide box; there is a preset swing gap between the two ends of the material holding box and the inner frame, and the material holding box is provided with side air holes and bottom air holes; the rotating device is installed on the box body and is drivingly connected to the material holding box;

[0010] In which, the inner frame divides the interior of the box body into an air inlet channel, a drying chamber and an exhaust channel, the box body is provided with an exhaust port, the exhaust port is connected to the exhaust channel, and a heating device is installed in the air inlet channel; the first air inlet and the second air inlet are opened up and down on one side of the inner frame, and the air outlet is opened on the other side of the inner frame; the other end of the L-shaped block passes through the second air inlet and is connected to the valve plate, and the first connecting hole and the second connecting hole are opened up and down on the valve plate; the valve plate closes the second air inlet; the fan, the air inlet channel, the first connecting hole, the first air inlet and the side air hole are connected in sequence.

[0011] Preferably, a mounting shaft is installed on the material containing box, and the mounting shaft is inserted into the rotating device.

[0012] Preferably, support blocks are installed on both sides of the inner frame, and the support blocks are located below the second air inlet.

[0013] Preferably, the rotating device includes a rotating shaft and a gear, the rotating shaft is rotatably mounted on the box body, and the gear is mounted on the rotating shaft; the mounting shaft is inserted into the rotating shaft; the lifting device also includes a gear group, the gear group is arranged on the driving shaft, and the gear group is located above the gear.

[0014] Preferably, the number of the support plate, the tooth group, the valve plate, the air guide support, the rotating device, the material holding box, the first air inlet and the second air inlet are all multiple, and the number of the eight is equal and arranged one by one; wherein the multiple support plates are installed on the drive shaft at intervals.

[0015] Preferably, the hot air circulation oven further comprises a connecting plate, and two adjacent valve plates are connected via the connecting plate.

[0016] Preferably, a counterweight block is provided on one side of the bottom of the material holding box.

[0017] Preferably, a receiving opening is provided at the bottom of the second air inlet, and each of the receiving openings is aligned with a corresponding one of the L-shaped blocks.

[0018] In order to solve the above technical problems, the present invention also provides a preparation process of Phellodendron chinense Bawei tablets, comprising the following steps:

[0019] S1. Weighing: weighing each ingredient according to the production instruction; wherein the ingredients include six-flavor mixed powder, black cloud incense, ox gall powder, sodium carboxymethyl starch, magnesium stearate and ethanol;

[0020] S2, mixing once, putting the six-flavor mixed powder, the black cloud incense, the ox gall powder and the sodium carboxymethyl starch into a mixing device in sequence, mixing for a first preset time, and then adding ethanol and mixing for a second preset time;

[0021] S3, granulation and drying, adding the mixed materials in step S2 into the swing granulator to complete granulation, and placing the prepared granules on a plate and moving them into the hot air circulation oven for drying;

[0022] S4, granulation and secondary mixing, granulating the dried granules using a stainless steel screen on a granulator, and then mixing with the sodium carboxymethyl starch and the magnesium stearate in preset weights;

[0023] S5, tabletting the mixed material in step S4;

[0024] S6, coating the material subjected to tableting in step S5 with sugar to obtain finished tablets;

[0025] S7, packaging, the finished tablets are bottled or aluminum-plastic packaged.

[0026] Compared with the related art, the hot air circulation oven provided by the present invention has the following beneficial effects:

[0027] When working, the fan starts to generate airflow, which is heated by the heating device and then blown into the material box through the air inlet channel through the first air inlet and the side air hole in sequence to dry the material; after the material is dried for a preset time, the lifting cylinder drives the air guide box to descend a preset distance through the support plate 23;

[0028] The opening at one end of the air guide box is lowered to be aligned with the second air inlet, and the air guide box drives the valve plate to be lowered through the L-shaped block. At this time, the first connecting hole is staggered with the first air inlet, the valve plate blocks the first air inlet, and the second connecting hole is aligned with the second air inlet; at this time, the hot air flow enters the interior of the air guide box through the second air inlet, and is blown into the material box through the top box opening and the bottom air hole of the air guide box, so that the hot air flow can be blown upward from the bottom of the material, and the blowing drying of different surfaces of the material can be achieved;

[0029] And because the air guide box is separated from the material box after it descends, the rotating device can drive the material box to swing back and forth within a preset angle, so that the material inside the material box can roll, thereby realizing the function of flipping the material. In addition, combined with the upward flowing hot air flow, it has an upward pushing effect on the material, which can better prevent the material from adhering to the material box and has a better flipping effect.

[0030] The lifting cylinder drives the air guide box up and down through the support plate to adjust the air guide box and the position of the valve plate, thereby switching the air path and providing a swing space for the rotating device to drive the material box to swing back and forth. The rotating device drives the material box to swing back and forth, so that the material rolls over without opening the box door, thereby automatically turning the material over, avoiding the outflow of hot air flow, and adjusting the flow direction of the hot air flow to blow to the material from multiple directions, thereby improving the drying efficiency of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is an assembly diagram of the hot air circulation oven provided by the present invention after the oven door and two material containing boxes are removed;

[0032] Figure 2 for Figure 1 A cross-sectional view of the hot air circulation oven shown;

[0033] Figure 3 for Figure 2 An enlarged schematic diagram of part A is shown;

[0034] Figure 4 for Figure 1 The structural schematic diagram of the material holding box shown;

[0035] Figure 5 for Figure 1 The schematic diagram of the principle of the valve plate switching the airflow direction is shown in FIG. Figure 5 (a) is a schematic diagram of hot air flowing into the drying chamber through the air inlet channel, the first through hole and the first air inlet. Figure 5 (b) is a schematic diagram of hot air flowing through the air inlet channel, the second through hole, the second air inlet and the air guide box into the drying chamber;

[0036] Figure 6 for Figure 1 The schematic diagram of the principle of the rotating device driving the material box to swing is shown, wherein: Figure 6 (a) is a schematic diagram of the meshing of the tooth set and the gear. Figure 6 (b) is a schematic diagram of the tooth group driving the gear to rotate clockwise at a preset angle;

[0037] Figure 7 for Figure 1 A side sectional view of the drying box shown;

[0038] Figure 8 This is a front view of the hot air circulation oven provided by the present invention.

[0039] Numbers in the figure:

[0040] 1. Drying box; 11. Box body; 12. Inner frame;

[0041] 101, air inlet channel; 102, air exhaust channel; 103, drying chamber; 111, air exhaust port;

[0042] 121, support block; 122, first air inlet; 123, second air inlet; 124, air outlet; 125, storage port;

[0043] 2. Lifting device; 21. Lifting cylinder; 22. Driving shaft; 23. Support plate; 24. Tooth group;

[0044] 3. air guide support; 31. air guide box; 32. L-shaped block;

[0045] 4. Material box; 41. Mounting shaft; 42. Counterweight; 401. Side air hole; 402. Bottom air hole;

[0046] 5. valve plate; 51. first communicating hole; 52. second communicating hole;

[0047] 6. Rotating device; 61. Rotating shaft; 62. Gear;

[0048] 7. Connecting plate;

[0049] 8. Fan; 9. Heating device. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] The invention provides a hot air circulation oven.

[0052] Please refer to Figures 1 to 3 In one embodiment of the present invention, the hot air circulation oven comprises: a drying box 1, a lifting device 2, an air guide support 3, a material holding box 4, a valve plate 5 and a rotating device 6; the drying box 1 comprises a box body 11 and an inner frame 12, and the inner frame 12 is installed in the box body 11;

[0053] The lifting device 2 includes a lifting cylinder 21, a driving shaft 22 and a support plate 23. The lifting cylinder 21 is installed on the box body 11. The driving shaft 22 is connected to the lifting end of the lifting cylinder 21. The driving shaft 22 passes through the inner frame 12 and is connected to the support plate 23.

[0054] The air guide support member 3 includes an air guide box 31 and an L-shaped block 32. The air guide box 31 is supported on the support plate 23, and one end of the air guide box 31 is open. One end of the L-shaped block 32 is connected to the air guide box 31.

[0055] A material holding box 4, the material holding box 4 is supported on the top box opening of the air guide box 31; there is a preset swing gap between the two ends of the material holding box 4 and the inner frame 12, and the material holding box 4 is provided with a side air hole 401 and a bottom air hole 402; the rotating device 6 is installed on the box body 11 and is in transmission connection with the material holding box 4;

[0056] Among them, the inner frame 12 divides the interior of the box body 11 into an air inlet channel 101, a drying chamber 103 and an exhaust channel 102, and an exhaust port 111 is opened on the box body 11, and the exhaust port 111 is connected to the exhaust channel 102, and a heating device 9 is installed in the air inlet channel 101; the first air inlet 122 and the second air inlet 123 are opened up and down on one side of the inner frame 12, and the air outlet 124 is opened on the other side of the inner frame 12; the other end of the L-shaped block 32 passes through the second air inlet 123 and is connected to the valve plate 5, and the first connecting hole 51 and the second connecting hole 52 are opened up and down on the valve plate 5; the valve plate 5 closes the second air inlet 123; the fan 8, the air inlet channel 101, the first connecting hole 51, the first air inlet 122 and the side air hole 401 are connected in sequence.

[0057] In this embodiment, the material box 4 is used to hold the material to be dried. The air guide box 31 may be in a convex shape.

[0058] Please refer to Figure 8 and Figure 1 The box door is arranged on the box body 11 to block the inside of the drying box 1. The inner wall of the box body 11 is provided with a heat preservation layer to reduce the heat loss inside the drying box 1. The lifting cylinder 21 can be a cylinder, a hydraulic cylinder or an electric push cylinder.

[0059] Please refer to Figure 5 , Figure 6 and Figure 3 When working, the fan 8 starts to generate airflow, which is heated by the heating device 9 and then blown into the material box 4 through the first air inlet 122 and the side air hole 401 in sequence from the air inlet channel 101 to dry the material; after the material is dried for a preset time, the lifting cylinder 21 drives the air guide box 31 to descend a preset distance through the support plate 23;

[0060] The opening at one end of the air guide box 31 is lowered to be aligned with the second air inlet 123, and the air guide box 31 drives the valve plate 5 to be lowered through the L-shaped block 32. At this time, the first connecting hole 51 is staggered with the first air inlet 122, the valve plate 5 blocks the first air inlet 122, and the second connecting hole 52 is aligned with the second air inlet 123; at this time, the hot air flow enters the interior of the air guide box 31 through the second air inlet 123, and is blown into the material box 4 through the top box opening and the bottom air hole 402 of the air guide box 31, so that the hot air flow can be blown upward from the bottom of the material, and the blowing drying of different surfaces of the material can be achieved;

[0061] And because the air guide box 31 is separated from the material box 4 after being lowered at this time, the rotating device 6 can drive the material box 4 to swing back and forth within a preset angle, so that the material inside the material box 4 can roll, thereby realizing the function of flipping the material, and combined with the upward flowing hot air flow, it has an upward pushing effect on the material, which can better prevent the material from adhering to the material box 4 and has a better flipping effect.

[0062] The lifting cylinder 21 drives the air guide box 31 to rise and fall through the support plate 23, so as to adjust the air guide box 31 and the position of the valve plate 5, thereby switching the air path and providing a swing space for the rotating device 6 to drive the material box 4 to swing back and forth. The rotating device 6 drives the material box 4 to swing back and forth, so that the material rolls over without opening the box door, thereby automatically turning the material over, avoiding the outflow of hot air flow, and adjusting the flow direction of the hot air flow to blow to the material from multiple directions, thereby improving the drying efficiency of the material.

[0063] Subsequently, the lifting cylinder 21 lifts the air guide support 3 to the starting position, at which time the first air inlet 122 is aligned with the first connecting hole 51 again, and the second air inlet 123 is staggered with the second connecting hole 52, that is, the valve plate 5 blocks the second air inlet 123, and at this time, the hot air flow is blown horizontally toward the material through the first air inlet 122 again to air dry the material. Finally, the material can be turned over multiple times.

[0064] In this embodiment, when the rotating device 6 drives the material box 4 to swing back and forth, the angle between the material box 4 and the horizontal plane is in the range of 3-10°. The diameters of the side air holes 401 and the bottom air holes 402 are smaller than the diameter of the material particles.

[0065] Both ends of the air guide box 31 can be slidably connected to the inner wall of the inner frame 12. A slide groove is provided on the inner wall of the inner frame 12, and sliders are correspondingly provided at both ends of the air guide box 31. The sliders slide into the slide groove to form a sliding assembly.

[0066] By setting it as an air guide box 31, the hot air flow flowing upward through the air guide box 31 can be guided and directed, so that the air flow can better enter the air hole at the bottom of the material holding box 4.

[0067] Please refer to Figure 4 and Figure 2 A mounting shaft 41 is mounted on the material holding box 4 , and the mounting shaft 41 is inserted into the rotating device 6 .

[0068] Thus, the material box 4 can be detachably mounted on the rotating device 6. The material box 4 can be detachably mounted at the output end of the rotating device 6 and placed on the air guide support 3, which is used to assist in supporting the material box 4; during operation, by directly placing the air guide box 31 on the support plate 23, it is also convenient to assemble and disassemble the air guide box 31.

[0069] Please refer again Figure 1 Support blocks 121 are installed on both sides of the inner frame 12 , and the support blocks 121 are located below the second air inlet 123 .

[0070] The support block 121 can support both ends of the air guide box 31. When the air guide box 31 drives the valve plate 5 to descend through the L-shaped block 32, so that the second connecting hole 52, the second air inlet 123 and the air guide box 31 are connected, the bottom of the air guide box 31 falls on the support block 121, and the air guide box 31 is supported by the support block 121, thereby improving the stability of the air guide box 31 when serving as an air guide channel.

[0071] Please refer to Figure 2 and Figure 4 In this embodiment, the rotating device 6 includes a rotating shaft 61 and a gear 62, the rotating shaft 61 is rotatably mounted on the box body 11, and the gear 62 is mounted on the rotating shaft 61; the mounting shaft 41 is inserted into the rotating shaft 61; the lifting device 2 also includes a tooth group 24, the tooth group 24 is arranged on the driving shaft 22, and the tooth group 24 is located above the gear 62.

[0072] Please refer to Figure 6 and Figure 2 When it is necessary to drive the material box 4 to swing back and forth, the lifting cylinder 21 lowers the support plate 23, driving the air guide box 31 to descend, and the air guide box 31 drives the valve plate 5 to descend through the L-shaped block 32, so that the second connecting hole 52, the second air inlet 123 and the air guide box 31 are connected. At this time, the air guide box 31 is supported by the support block 121, and the tooth group 24 on the drive shaft 22 is correspondingly engaged with the gear 62 on the rotating shaft 61; at this time, the lifting cylinder 21 pushes down a preset distance again, the support plate 23 is separated from the air guide box 31, and the tooth group 24 drives the gear 62 to rotate clockwise by a preset angle, thereby driving the material box 4 to follow the clockwise rotation through the rotating shaft 61, and then the lifting cylinder 21 pulls up the preset distance, and the tooth group 24 drives the gear 62 to rotate counterclockwise by a preset angle. At this time, the material box 4 follows the counterclockwise rotation, and this is repeated many times to achieve the goal of driving the material box 4 to swing back and forth.

[0073] Preferably, the installation shaft 41 is a square shaft, and a square groove is correspondingly provided on the rotating shaft 61; sliding keys may also be provided on both sides of the installation shaft 41, an assembly groove adapted to the installation shaft 41 may be provided on the rotating shaft 61, and sliding grooves may be provided on both sides of the assembly groove corresponding to the sliding keys.

[0074] In other embodiments, the rotating device 6 includes a motor and an assembly shaft. The motor is installed outside the box 11, the assembly shaft is installed at the output end of the motor, and the assembly shaft passes through the box 11 and extends to the inside of the box 11. The material box 4 is installed on the assembly shaft.

[0075] Please refer again Figure 2 The number of the support plate 23, the tooth group 24, the valve plate 5, the air guide support 3, the rotating device 6, the material holding box 4, the first air inlet 122 and the second air inlet 123 are all multiple, and the number of the eight is equal and arranged one by one; wherein the multiple support plates 23 are installed on the driving shaft 22 at intervals.

[0076] By using a plurality of material containing boxes 4, more materials can be dried, thereby improving the drying efficiency.

[0077] In this embodiment, the supporting block 121 is correspondingly disposed below each second air inlet 123 .

[0078] The number of the support plate 23, the tooth group 24, the valve plate 5, the air guide support 3, the rotating device 6, the material holding box 4, the first air inlet 122 and the second air inlet 123 can all be three, and of course other numbers can also be set according to usage.

[0079] Please refer to Figure 3 and Figure 2 As a preferred mode of this embodiment, the hot air circulation oven further comprises a connecting plate 7, and two adjacent valve plates 5 are connected by the connecting plate 7. By connecting the adjacent valve plates 5 by the connecting plate 7, the multiple valve plates 5 form a whole, support each other and limit each other, thereby improving the stability of the valve plate 5.

[0080] Please refer to Figure 1 and Figure 7 The bottom of the second air inlet 123 is connected to a receiving opening 125 , and each receiving opening 125 is aligned with a corresponding one of the L-shaped blocks 32 .

[0081] When the air guide box 31 drives the valve plate 5 to descend through the L-shaped block 32 to connect the second connecting hole 52, the second air inlet 123 and the air guide box 31, the L-shaped block 32 moves down to the receiving port 125, thereby reducing the opening width of the second air inlet 123.

[0082] The connecting plate 7 is disposed corresponding to the receiving opening 125 , and can block the receiving opening 125 , thereby preventing the airflow from being discharged through the receiving opening 125 and having no effect on the material.

[0083] Please refer to Figure 2 and Figure 6 A counterweight block 42 is provided on one side of the bottom of the material holding box 4 .

[0084] In this embodiment, the tooth set 24 is located on the right side of the gear 62, so that the counterweight 42 is arranged on the bottom left side of the material holding box 4. When the tooth set 24 is located on the left side of the gear 62, the counterweight 42 is arranged on the bottom right side of the material holding box 4.

[0085] When the air guide box 31 is separated from the material box 4, since the end of the counterweight block 42 is heavier, the material box 4 will rotate to that side. When the tooth set 24 on the drive shaft 22 drops to mesh with the gear 62, the material box 4 is Figure 6 The drive shaft 22 is set at an inclined angle, and the subsequent drive shaft 22 continues to descend, and the tooth group 24 drives the gear 62 to rotate, and rotates clockwise to horizontal and inclined in sequence, so that when the drive shaft 22 moves up and down within a preset distance, it can drive the material box 4 to tilt and swing left and right.

[0086] The working principle of the hot air circulation oven provided by the present invention is as follows:

[0087] Please refer to Figure 5 and Figure 6 When working, the fan 8 starts to generate airflow, which is heated by the heating device 9 and then blown toward the material box 4 through the air inlet channel 101 and the first air inlet 122. The air enters the interior of the material box 4 through the side air holes 401 of the material box 4 and dries the material inside the material box 4. After the material is dried for a preset time, the lifting cylinder 21 drives the air guide box 31 to descend a preset distance through the support plate 23.

[0088] The opening at one end of the air guide box 31 is lowered to be aligned with the second air inlet 123, and the air guide box 31 drives the valve plate 5 to be lowered through the L-shaped block 32. At this time, the first connecting hole 51 is staggered with the first air inlet 122, the valve plate 5 blocks the first air inlet 122, and the second connecting hole 52 is aligned with the second air inlet 123; at this time, the hot air flow enters the interior of the air guide box 31 through the second air inlet 123, and is blown into the material box 4 through the top box opening and the bottom air hole 402 of the air guide box 31, so that the hot air flow can be blown upward from the bottom of the material, and the blowing drying of different surfaces of the material can be achieved;

[0089] And because the air guide support 3 is separated from the material box 4 after being lowered, the rotating device 6 can reciprocate and drive the material box 4 to swing within a preset angle, so that the material inside the material box 4 can roll;

[0090] Specifically, when the lifting cylinder 21 lowers the support plate 23, the air guide box 31 is driven to lower, and the air guide box 31 drives the valve plate 5 to lower through the L-shaped block 32, so that the second connecting hole 52, the second air inlet 123 and the air guide box 31 are connected. At this time, the air guide box 31 is supported by the support block 121, and the tooth group 24 on the drive shaft 22 is meshed with the gear 62 on the rotating shaft 61. At this time, the lifting cylinder 21 pushes down a preset distance again, the support plate 23 is separated from the air guide box 31, and the tooth group 24 drives the gear 62 to rotate clockwise by a preset angle, thereby driving the material box 4 to follow the clockwise rotation through the rotating shaft 61, and then the lifting cylinder 21 pulls up the preset distance, and the tooth group 24 drives the gear 62 to rotate counterclockwise by a preset angle. At this time, the material box 4 follows the counterclockwise rotation, and this is repeated many times to achieve the reciprocating swing of the material box 4; finally, the material can be automatically turned over many times without opening the box door, which can avoid the outflow of hot air flow and improve the drying efficiency of the material. The lifting cylinder 21 can switch the material box 4 from a horizontal air supply state to a vertical air supply state, and between the state switching, the material box 4 can be turned over in a reciprocating swinging manner.

[0091] The invention also provides a preparation process of the Phellodendron chinense eight-flavor tablets.

[0092] The preparation process of Huangbai Bawei tablets comprises the following steps:

[0093] Step S1: weighing, weighing each ingredient according to the production instruction; wherein the ingredients include six-flavor mixed powder, black cloud incense, ox gall powder, sodium carboxymethyl starch, magnesium stearate and ethanol;

[0094] Step S2: mixing once, putting the six-flavor mixed powder, the black cloud incense, the ox gall powder and the sodium carboxymethyl starch into a mixing device in sequence, mixing for a first preset time, and then adding ethanol and mixing for a second preset time;

[0095] Specifically, the first preset time is 20 minutes, and the second preset time is 5 to 10 minutes. When the mixing is completed, the wetness and color are uniform, wherein the sodium carboxymethyl starch is 2% by weight of the eight-flavor mixed powder.

[0096] Step S3: granulation and drying, adding the materials mixed in step S2 into the swing granulator to complete granulation, and placing the prepared granules on a plate and moving them into the hot air circulation oven for drying;

[0097] For example, in the hot air circulation oven, adjust the hot air temperature at 55-65°C, first start dehumidification for 15 minutes, then turn on the heating system for drying, and keep the dehumidification on, set the baking temperature to 60°C, and bake for 4-5 hours after the temperature rises to 60°C, turn off the oven heating system, and still keep the dehumidification state, turn the plate over every 2 hours during the baking process, and dry to the requirement of moisture <5.0%.

[0098] Step S4: granulation and secondary mixing: the dried granules are granulated on a granulator using a stainless steel screen, and then mixed with the sodium carboxymethyl starch and the magnesium stearate of preset weights;

[0099] For example, the stainless steel screen can be a 16-mesh stainless steel screen. After the granules are sized through the stainless steel screen, the sized granules are placed in a clean packaging bag, the total weight of the granules is weighed, sodium carboxymethyl starch and magnesium stearate are weighed at 0.5% of the total weight of the granules after granulation, the granules after granulation and the weighed sodium carboxymethyl starch and magnesium stearate are poured into a multi-directional motion mixer, the machine is turned on for total mixing for 20 minutes, the rotation power is 30-33 Hz, after mixing evenly, the granules are placed in a container lined with a clean plastic bag, and the bag mouth is tied;

[0100] Fill in the container with the packing list information, such as product name, specification, batch number, gross weight, tare weight, net weight, operator, reviewer, date, etc., and hand it over to the intermediate station to calculate the material balance.

[0101] Step S5: tableting the mixed material in step S4;

[0102] First, test the tablets. After the test tablets meet the specified requirements, adjust the tableting speed to 20-30 revolutions per minute and the tableting pressure to 0.35-0.40 MPa to start tableting and remove defective products.

[0103] Step S6: coating the material compressed in step S5 with sugar to obtain finished tablets;

[0104] For example, for every 50kg of substrate, 15-18kg of sucrose, 26-33kg of talcum powder, 0.13-0.2kg of gelatin for capsules, and 44-67g of white wax are used; the concentration of saturated syrup is 70%, of which sucrose: purified water is 7:3; the concentration of gelatin slurry for capsules is 30%, of which gelatin: purified water is 3:7; the concentration of gelatin syrup for capsules is 1:9;

[0105] Preparation of saturated syrup: heat sucrose and purified water in a sandwich pot according to a proportion and boil them; preparation of gelatin slurry for capsules: weigh gelatin for capsules according to a preset proportion and then add purified water to soften the gelatin for capsules; preparation of gelatin syrup for capsules: first prepare saturated syrup, then add gelatin slurry for capsules to the saturated syrup according to a proportion while it is hot, stir evenly with a stainless steel ladle and pass through a 100-mesh sieve to obtain gelatin syrup for capsules;

[0106] Each batch of substrates is divided into five pots for coating, and each pot contains one barrel of substrates. The substrates are poured into the coating pot, and the substrates are coated with an isolation layer, a powder coating layer, and a sugar coating layer in sequence, and finally polished.

[0107] Step S7: packaging, the finished tablets are bottled or aluminum-plastic packaged.

[0108] Among them, the six-flavor mixed powder is Phellodendron chinense, Fragrant Mo, Gardenia jasminoides, Licorice, Carthamus tinctorius and Piper longum; when the production volume of Phellodendron chinense eight-flavor tablets is 450,000 tablets, the composition of each raw material can be: 163.3kg of six-flavor mixed powder, 21.4kg of Heiyunxiang, 40.1kg of ox gall powder, 2.5% of the weight of the raw material particles by sodium carboxymethyl starch, 0.5% of the weight of the raw material particles by magnesium stearate, and an appropriate amount of ethanol.

[0109] The entire process conditions are: indoor temperature: 18 ~ 26 ℃; relative humidity: 45 ~ 65%; clean level D, the operation room should maintain a relative negative pressure.

[0110] The calculation formula of the material balance in step S4 is (output total mixed particles + recordable waste amount + sampling amount) / total material input amount, and then the percentage value is taken.

[0111] The coating operation of the isolation layer, the powder coating layer and the sugar coating layer in step S6 may be:

[0112] Isolation layer: Place the substrate into the coating pot, open the coating pot, add 1000ml of gelatin syrup for capsules, which can moisten the surface of the tablet core and allow the syrup to evenly adhere to the tablet surface. Add an appropriate amount of talcum powder (about 2kg) until it is just not sticky, continue stirring to make it evenly adhere to the tablet core, start heating or blowing hot air at 40-50℃, fully dry to evaporate the water in the syrup, and dry the tablet coating. After drying, apply the second layer according to the above method to make all the tablets tightly wrapped. Apply 3-5 layers, and the drying time for each layer is about 25 minutes;

[0113] Powder coating layer: add 1000ml of gelatin syrup for capsules to the tablets that continue to rotate in the pot, stir to make all the tablets evenly moistened, then sprinkle an appropriate amount of talcum powder (about 2kg) to make it evenly adhere to the surface of the tablets, and then heat and blow to dry quickly. Repeat the operation, and the amount of gelatin syrup for capsules and talcum powder added from the fifth layer onwards will decrease layer by layer until the edges and corners of the tablet core disappear, and it is round, dry and smooth. Generally, 9 to 12 layers are required, and the drying time for each layer is about 25 minutes;

[0114] Sugar coating layer: only syrup is used for coating without talcum powder, and no heating is required. At the beginning of the operation, add 1000ml of syrup and stop blowing. (Add syrup in each subsequent layer, decreasing by 50ml layer by layer). When the surface of the tablet is slightly dry, ventilate and dry to form a fine sucrose crystal layer. Until the tablet is round and smooth. Generally, 5 to 7 layers are required, and the drying time for each layer is about 15 minutes.

[0115] Polishing: Stop the coating pan and cover the pan tightly. Turn the sugar-coated tablets over several times to allow the remaining trace of water to slowly dissipate. Wait until it cools to room temperature, then start the pan again. Sprinkle 2 / 3 of the required wax powder into the pan in small amounts and multiple times. Rotate and rub to create a smooth surface. Slowly add the remaining wax powder and rotate the pan until the coating surface is extremely shiny. Sprinkle 30-60g of insect wax into each pan.

[0116] Evenly load each pot of coated tablets into the drying tray and place them neatly on the drying rack for drying. The drying time is generally 10 to 18 hours.

[0117] Among them, the specific structure of the hot air circulation oven refers to the above-mentioned embodiment. Since the production process of Huangbai Bawei Tablets adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0118] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A hot air circulation oven, characterized in that: include: A drying box, a lifting device, an air guide support, a material holding box, a valve plate and a rotating device; the drying box comprises a box body and an inner frame, and the inner frame is installed in the box body; The lifting device includes a lifting cylinder, a driving shaft and a support plate, wherein the lifting cylinder is installed on the box body, the driving shaft is connected to the lifting end of the lifting cylinder, and the driving shaft passes through the inner frame and is connected to the support plate; The air guide support member includes an air guide box and an L-shaped block, wherein the air guide box is supported on the support plate, and one end of the air guide box is open, and one end of the L-shaped block is connected to the air guide box; A material holding box, the material holding box is supported on the top box opening of the air guide box; there is a preset swing gap between the two ends of the material holding box and the inner frame, and the material holding box is provided with side air holes and bottom air holes; the rotating device is installed on the box body and is drivingly connected to the material holding box; Wherein, the inner frame divides the interior of the box body into an air inlet channel, a drying chamber and an exhaust channel, the box body is provided with an exhaust port, the exhaust port is connected to the exhaust channel, and a heating device is installed in the air inlet channel; a first air inlet and a second air inlet are arranged on one side of the inner frame from top to bottom, and an air outlet is arranged on the other side of the inner frame; the other end of the L-shaped block passes through the second air inlet and is connected to the valve plate, and a first connecting hole and a second connecting hole are arranged on the valve plate from top to bottom; the valve plate closes the second air inlet; the fan, the air inlet channel, the first connecting hole, the first air inlet and the side air hole are connected in sequence; After the material is dried for a preset time, the lifting cylinder drives the air guide box to descend a preset distance through the support plate, and the opening at one end of the air guide box descends to be aligned with the second air inlet, and the air guide box drives the valve plate to descend through the L-shaped block. At this time, the first connecting hole is staggered with the first air inlet, and the valve plate blocks the first air inlet. The second connecting hole is aligned with the second air inlet. At this time, the hot air flow enters the interior of the air guide box through the second air inlet, and is blown into the material box through the top box opening of the air guide box and the bottom air hole, so that the hot air flow is blown upward from the bottom of the material.

2. The hot air circulation oven according to claim 1, characterized in that: A mounting shaft is mounted on the material containing box, and the mounting shaft is inserted into the rotating device.

3. The hot air circulation oven according to claim 2, characterized in that: Support blocks are installed on both sides of the inner frame, and the support blocks are located below the second air inlet.

4. The hot air circulation oven according to claim 3, characterized in that: The rotating device includes a rotating shaft and a gear, the rotating shaft is rotatably mounted on the box body, and the gear is mounted on the rotating shaft; the mounting shaft is inserted into the rotating shaft; the lifting device also includes a tooth group, the tooth group is arranged on the driving shaft, and the tooth group is located above the gear.

5. The hot air circulation oven according to claim 4, characterized in that: The number of the support plate, the tooth group, the valve plate, the air guide support, the rotating device, the material box, the first air inlet and the second air inlet are all multiple, and the number of the support plate, the tooth group, the valve plate, the air guide support, the rotating device, the material box, the first air inlet and the second air inlet is the same and is arranged one by one; wherein the multiple support plates are installed on the drive shaft at intervals.

6. The hot air circulation oven according to claim 5, characterized in that: The hot air circulation oven further comprises a connecting plate, and two adjacent valve plates are connected by the connecting plate.

7. The hot air circulation oven according to claim 5, characterized in that: A counterweight block is arranged on one side of the bottom of the material containing box.

8. The hot air circulation oven according to claim 5, characterized in that: The bottom of the second air inlet is connected to a receiving opening, and each of the receiving openings is aligned with a corresponding one of the L-shaped blocks.

9. A preparation process of Phellodendron chinense eight-flavor tablets, characterized in that: The following steps are involved: S1. Weighing: weighing each ingredient according to the production instruction; wherein the ingredients include six-flavor mixed powder, black cloud incense, ox gall powder, sodium carboxymethyl starch, magnesium stearate and ethanol; S2, mixing once, putting the six-flavor mixed powder, the black cloud incense, the ox gall powder and the sodium carboxymethyl starch into a mixing device in sequence, mixing for a first preset time, and then adding ethanol and mixing for a second preset time; S3, granulation and drying, adding the mixed material in step S2 into a swing granulator to complete granulation, and placing the prepared granules on a plate into a hot air circulation oven as described in any one of claims 1 to 8 for drying; S4, granulation and secondary mixing, granulating the dried granules using a stainless steel screen on a granulator, and then mixing with the sodium carboxymethyl starch and the magnesium stearate in preset weights; S5, tabletting the mixed material in step S4; S6, coating the material subjected to tableting in step S5 with sugar to obtain finished tablets; S7, packaging, the finished tablets are bottled or aluminum-plastic packaged.

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