Dry granulation device and method for traditional Chinese medicine formula granules

Abstract

The dry granulation device comprises a storage hopper, the bottom of the storage hopper communicates with a stirring channel, the inner wall of the stirring channel is fixedly connected with a plurality of stirring arc plates, and the inner wall of the stirring channel is rotationally connected with a plurality of stirring rods; each stirring rod is fixedly connected with an outer spiral arc plate, an inner spiral arc plate and a plurality of stirring rods, and each outer spiral arc plate is fixedly connected with a plurality of stirring plates; the bottom of the stirring channel is sequentially communicated with a feeding assembly, a tabletting assembly, a granulating assembly and a classifying screen assembly, one side of the bottom of the stirring channel is fixedly connected with a detection assembly, one side of the bottom of the stirring channel is communicated with a stored material recycling assembly, and the classifying screen assembly is communicated with a red powder recycling assembly. Mixed medicine powder is pushed to advance through the structure on the stirring rod, the mixed medicine powder is fully detected, whether the mixing uniformity degree reaches the standard or not is judged, and therefore it is guaranteed that raw material medicine powder is fully mixed before particle production, and the production quality of medicine particles is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of dry granulation, and particularly relates to a dry granulation device and method for traditional Chinese medicine formula granules. Background Art

[0002] Dry granulation technology is a new granulation method that omits multiple intermediate links in traditional wet granulation, such as wet mixing, drying, and pulverizing, thereby reducing production costs and intermediate expenses. This technology uses a roller flat pressing granulator or similar equipment to press dry extract powder of medicine into thin slices after adding a certain amount of auxiliary materials, and then pulverizes them into granules. Exactly because there is no solvent involved throughout the process, it is more difficult to control the mixing degree of the medicine powder.

[0003] In traditional dry granulation devices, it is default to put the fully mixed medicine powder into the storage hopper. However, during the processing of dry granulation, if there is a large density difference between the mixed medicine powders or the powder particles are too different in size, the mixed medicine powder may form a layered phenomenon due to vibration during the feeding process, resulting in a reduced uniformity of the components in the subsequent tablet pressing and granulating processes, weakening the therapeutic effect of the traditional Chinese medicine granules. And if the powder raw materials of each component of the traditional Chinese medicine formula are put in, it is even more difficult to ensure the quality of the final traditional Chinese medicine granule product, wasting raw materials and production capacity in vain.

[0004] Therefore, it is necessary to propose a dry granulation device and method for traditional Chinese medicine formula granules that can fully mix the traditional Chinese medicine powder before feeding, detect the mixing degree of the mixed medicine powder, and recycle the unqualified mixed medicine powder for re - mixing. Summary of the Invention

[0005] In order to solve the above problems, the purpose of the present invention is to provide a dry granulation device and method for traditional Chinese medicine formula granules. The inner spiral arc plate and the outer spiral arc plate on the stirring rod are used to push the mixed medicine powder forward. Through the stirring of the stirring rod and the stirring rod, the medicine powder is fully mixed. The sampling column is used to extract the mixed medicine powder, and the gas displacement method is used to detect the volume of the sampled powder, and the density of the mixed medicine powder is calculated to determine whether the mixing uniformity meets the standard, so as to ensure that the raw material medicine powder before granule production is fully mixed and improve the production quality of drug granules.

[0006] To achieve the above object, the technical solution of the present invention is as follows: A dry granulation device for traditional Chinese medicine formula granules includes a storage hopper. The bottom of the storage hopper is connected to a stirring assembly. A frame is fixedly connected to the outside of the storage hopper. The stirring assembly includes a stirring channel, which is connected to the storage hopper. The inner wall of the top of the stirring channel is fixedly connected with a lateral sliding plate. The inner wall of the stirring channel is fixedly connected with a number of stirring arc plates. Adjacent stirring arc plates are respectively fixedly connected to the inner wall of the opposite stirring channel. A number of stirring rods are rotatably connected to the inner wall of the stirring channel, and are respectively located above the stirring arc plates. The stirring rods all pass through the stirring channel and one side of each is coaxially fixedly connected to the output shaft of a stirring motor. Inner spiral arc plates and outer spiral arc plates are sleeved on the stirring rods. A number of stirring rods are vertically fixedly connected to the stirring rods. One end of the stirring rod away from the stirring rod is fixedly connected to the corresponding outer spiral arc plate, and one end of the stirring rod close to the stirring rod is fixedly connected to the corresponding inner spiral arc plate. A number of stirring plates are fixedly connected to both sides of the outer edge of the outer spiral arc plate;

[0007] The bottom of the stirring channel is connected to a feeding assembly. A powder valve is provided at the bottom end of the stirring channel. A detection assembly is fixedly connected to one side of the bottom of the stirring channel. A storage and recovery assembly is connected to one side of the bottom of the stirring channel. The bottom of the feeding assembly is connected to a tablet pressing assembly. The bottom of the tablet pressing assembly is connected to a granulating assembly. The bottom of the granulating assembly is connected to a grading sieve assembly. The grading sieve assembly is connected to a powder recovery assembly. The other ends of the powder recovery assembly and the storage and recovery assembly are both connected to the storage hopper;

[0008] The detection assembly is used to detect whether the density of the mixed medicinal powder after stirring reaches the standard of uniform mixing. The storage and recovery assembly is used to pump the unqualified mixed medicinal powder back to the storage hopper for re-stirring. The feeding assembly is used to push the mixed medicinal powder into the tablet pressing assembly. The tablet pressing assembly is used to press the mixed medicinal powder into tablets. The granulating assembly is used to crush the tablets into traditional Chinese medicine granules of a preset size. The grading sieve assembly is used to separate the finished traditional Chinese medicine granules and the attached medicinal powder. The powder recovery assembly is used to pump the attached medicinal powder back to the storage hopper for reuse;

[0009] A controller is fixedly connected to one side of the frame. The stirring motor, the powder valve, the feeding assembly, the detection assembly, the storage and recovery assembly, the tablet pressing assembly, the granulating assembly, the grading sieve assembly and the powder recovery assembly are all signal-connected to the controller.

[0010] The principle of the basic solution is as follows: The stirring component drives the stirring rod to rotate through the stirring motor. The stirring rods, inner spiral arc plates, and outer spiral arc plates on the stirring rod work together to push and mix the medicinal powder in the storage hopper. The design of the inner spiral arc plate and the outer spiral arc plate helps the medicinal powder to form a flow in the stirring channel, ensuring that the medicinal powder is fully mixed. At the same time, the stirring plates on the stirring rods further enhance the mixing effect. The detection component uses the gas displacement method to detect the volume of the sampled powder. Combining the weight of the sampled powder (which can be obtained through pressure sensing), the density of the mixed medicinal powder can be calculated. By comparing the actual density with the preset standard density of mixing uniformity, it can be determined whether the uniformity of the mixed medicinal powder meets the standard. The mixed medicinal powder that passes the detection is sent into the tablet pressing component through the feeding component and pressed into tablets. The tablets then enter the granulating component and are crushed into traditional Chinese medicine granules of a preset size. The grading sieve component is used to separate the finished traditional Chinese medicine granules and the attached medicinal powder to ensure the uniformity and quality of the granules. The attached medicinal powder is recovered by the attached powder recovery component and sent back to the storage hopper to achieve the reuse of resources. For the mixed medicinal powder that fails to meet the standard, the storage recovery component pumps it back to the storage hopper for re-stirring until the standard of mixing uniformity is reached.

[0011] The beneficial effects of the basic solution are as follows: 1. The ingenious combination of the stirring rod, stirring rods, inner spiral arc plates, and outer spiral arc plates in the stirring component forms an efficient mixing system, which can ensure that the medicinal powder is mixed comprehensively and multi-levelly in the stirring channel, thus significantly improving the mixing uniformity. This efficient mixing method not only improves the product quality but also shortens the mixing time, thereby improving the production efficiency of the entire granulating process.

[0012] 2. The design of the attached powder recovery component and the storage recovery component realizes the timely recovery and reuse of the mixed medicinal powder that fails to meet the standard and the attached medicinal powder, reduces the waste of raw materials, and improves the resource utilization rate. At the same time, the generation of waste is reduced during the entire granulating process, which conforms to the concept of environmental protection and energy conservation and is conducive to sustainable development.

[0013] 3. The design of this device has a high degree of flexibility and can be applied to the preparation requirements of various traditional Chinese medicine formula granules. By adjusting key parameters such as stirring parameters, tablet pressing pressure, and the specifications of corresponding accessories, the production of traditional Chinese medicine formula granules with different specifications and properties can be easily achieved.

[0014] 4. The improvement of mixing uniformity and the application of intelligent detection ensure the accurate proportion and uniform distribution of various components in traditional Chinese medicine formula granules. This helps to improve the efficacy and safety of drugs and provides more reliable and effective treatment options for patients.

[0015] Furthermore, the feeding assembly includes a feeding hopper, in which a feeding screw is provided. A feeding motor is fixedly connected to the top wall of the feeding hopper. The output shaft of the feeding motor extends downward through the top wall of the feeding hopper and is fixedly connected coaxially with the feeding screw. One side of the top wall of the feeding hopper communicates with the stirring channel, and the feeding motor is in signal connection with the controller.

[0016] The beneficial effects of the basic solution are as follows: 1. Driven by the feeding motor, the feeding screw in the feeding assembly can convey the uniformly mixed powder from the stirring channel to the tablet pressing assembly at a stable speed. By adjusting the rotation speed of the feeding motor, the feeding speed can be precisely controlled to ensure that the tablet pressing assembly obtains a continuous and stable powder supply. This ability to precisely control the feeding speed not only improves production efficiency but also avoids tablet pressing quality problems caused by uneven feeding, such as uneven tablet thickness and weight.

[0017] 2. The design of the feeding screw helps to reduce the blockage of the powder during transportation. Its spiral blades can push the powder to flow smoothly in the feeding hopper, avoiding the problem of powder blockage in the channel due to accumulation. At the same time, the feeding assembly also helps to reduce errors and fluctuations during the tablet pressing process, improving the yield and consistency of the drug granules.

[0018] 3. The signal connection between the feeding assembly and the controller makes the entire granulation process more intelligent and automated. The controller can adjust the rotation speed and feeding amount of the feeding motor in real time according to the preset programs and parameters, thus ensuring the stability and reliability of the entire granulation process. This intelligent control method not only improves production efficiency but also reduces the risk of manual intervention and the production failures and quality problems caused by operation errors.

[0019] Furthermore, the detection assembly includes a detection tube, which is fixedly connected to one side of the stirring channel. A detection motor is fixedly connected to the end of the detection tube far from the stirring channel. The output shaft of the detection motor extends into the detection tube and is fixedly connected coaxially with an electric push rod. The end of the output shaft of the electric push rod is fixedly connected with a sampling column, which passes through the side wall of the stirring channel and is slidably matched with the side wall of the stirring channel. Sampling grooves are formed on the sampling column, and a pressure sensor is laid on the inner bottom wall of the sampling groove. A detection ring is fixedly connected in the detection tube, and the inner wall of the detection ring is slidably matched with the sampling column. A detection through hole is formed on the inner top wall of the detection ring, which extends upward through the detection tube and is communicated with the output end of an air pump. The input end of the air pump is communicated with an air storage tank, and a pressure sensor is provided on the air pump. The detection motor, the electric push rod, the pressure sensor, the air pump and the pressure sensor are all in signal connection with the controller.

[0020] The beneficial effects of the basic solution are as follows: 1. The detection component drives the sampling column to slide in the stirring channel through an electric push rod, and samples the mixed powder using the sampling groove. This sampling method is not only easy to operate, but also ensures the representativeness and accuracy of sampling. The combined use of a pressure sensor and a pneumatic pressure sensor can accurately measure the volume and density of the sampled powder. By comparing the actual density with the preset standard density of uniform mixing, it is possible to accurately determine whether the uniformity of the mixed powder meets the standard, thus ensuring the production quality of drug particles.

[0021] 2. Components such as the detection motor, electric push rod, and air pump are all signal-connected to the controller, realizing the intelligent control of the detection process. The controller can automatically perform operations such as sampling, gas replacement, measurement, and judgment according to preset programs and parameters, improving the automation level of the entire detection process. This intelligent detection process not only improves the detection efficiency, but also reduces the risk of manual intervention and the detection errors caused by operation mistakes.

[0022] 3. The controller can real-time monitor the data of each sensor in the detection component and make judgments and process according to the data. Once it detects that the density of the mixed powder does not meet the standard, the controller can immediately issue an instruction to start the storage and recycling component to pump the non-compliant mixed powder back to the storage hopper for re-stirring. This real-time monitoring and feedback mechanism makes the entire granulation process more flexible and controllable, and can adjust production parameters in a timely manner according to the actual situation to ensure product quality and production efficiency.

[0023] Furthermore, the stirring arc plate close to the sampling column is fixedly connected to the inner wall of the stirring channel on the opposite side of the sampling column.

[0024] The beneficial effects of the basic solution are as follows: The stirring arc plate on the opposite side ensures that the opening is above the sampling column, which means that the mixed powder that has been stirred and mixed for the first time will fall on the sampling column, improving the sampling efficiency.

[0025] Furthermore, the storage and recycling component includes a storage and recycling pipe. One end of the storage and recycling pipe is communicated with the bottom side wall of the stirring channel, and the other end is communicated with the side wall of the storage hopper. A first pneumatic transport pump is provided on the storage and recycling pipe, and the first pneumatic transport pump is signal-connected to the controller.

[0026] The beneficial effects of the basic solution are as follows: 1. The storage and recycling component quickly and efficiently transports the non-compliant mixed powder from the bottom of the stirring channel back to the storage hopper through the storage and recycling pipe. This design avoids the accumulation and waste of non-compliant mixed powder, and also reduces the time and cost of manual cleaning. As the power source, the first pneumatic transport pump can be quickly started under the instruction of the controller, and transport the mixed powder back to the storage hopper at a relatively high speed, ensuring the timeliness and efficiency of the recycling process.

[0027] 2. The introduction of the material storage and recycling component makes the entire production process more flexible and controllable. Once it is detected that the uniformity of the mixed powder does not meet the standard, the controller can immediately activate the material storage and recycling component to recycle the non-compliant mixed powder and remix it. This design avoids rework and downtime caused by uneven mixing, improving production efficiency and quality stability. At the same time, due to the highly automated recycling process, the risk and cost of manual intervention are reduced.

[0028] 3. The material storage and recycling component can ensure that the non-compliant mixed powder is fully utilized, avoiding waste of raw materials. Through remixing and detection, the non-compliant mixed powder can be transformed into qualified products that meet the requirements, thereby reducing production costs and raw material losses. In addition, due to the reduction of rework and scrapping, the cost expenditure caused by quality problems is also reduced.

[0029] Furthermore, the tablet pressing component includes a tablet pressing chamber. The top of the tablet pressing chamber is connected to the bottom of the feeding hopper. Inside the tablet pressing chamber, there are parallel and symmetric tablet pressing shafts. Corresponding tablet pressing grooves are formed on the tablet pressing shafts. On one side of the tablet pressing chamber, there are symmetric tablet pressing motors fixedly connected. The output shafts of the tablet pressing motors all pass through the side wall of the tablet pressing chamber and are coaxially fixedly connected to the corresponding tablet pressing shafts. The tablet pressing motors are all signal-connected to the controller.

[0030] The beneficial effects of the basic solution are as follows: The automated tablet pressing process reduces the need for manual operation and monitoring, reducing labor costs. At the same time, due to the highly automated tablet pressing process, the quality problems and downtime caused by operational errors are also reduced. Precise tablet pressing control ensures the full utilization of the powder, reducing waste of raw materials. This helps to reduce production costs and improve economic efficiency. The design of the tablet pressing component is simple and clear, easy to maintain and clean. This reduces the equipment maintenance cost and ensures the long-term stable operation of the equipment.

[0031] Furthermore, the granulating component includes a granulating chamber. The top of the granulating chamber is connected to the bottom of the tablet pressing chamber. A screen is laid at the bottom of the granulating chamber. Inside the granulating chamber, there are several grinding rollers that rotate in cooperation with each other. On one side of the granulating chamber, there are several granulating motors fixedly connected. The output shafts of the granulating motors all pass through the side wall of the granulating chamber and are respectively coaxially fixedly connected to the corresponding grinding rollers. The granulating motors are all signal-connected to the controller.

[0032] The beneficial effects of the basic solution are as follows: The granulating motors are signal-connected to the controller, realizing the automated control of the granulating process. The controller can automatically adjust the rotation speed and rotation direction of the granulating motors according to the preset programs and parameters, thereby precisely controlling the cooperation and rotation speed of the grinding rollers to ensure the stability and consistency of the granulating process. The several grinding rollers fixedly connected inside the granulating chamber rotate in cooperation with each other to effectively grind and granulate the tablets falling from the tablet pressing chamber. At the same time, the screen laid at the bottom of the granulating chamber can screen the granulated particles to ensure the uniformity of the particles and the particle size distribution that meets the requirements.

[0033] Furthermore, the grading sieve assembly includes a guiding chute. The top of the guiding chute communicates with the whole-grain chamber. An inclined sieve plate parallel to the top wall of the guiding chute is laid in the guiding chute. The inclined sieve plate is elastic. A grading motor is fixedly connected to the side wall of the guiding chute. The output shaft of the grading motor passes through the side wall of the guiding chute and is fixedly connected with a cam. The inclined sieve plate is located on the rotation track of the cam. An outlet is opened at the bottom of the guiding chute. The outlet is divided into left and right parts by the inclined sieve plate. An outlet pipe is communicated with the outlet on the right side of the inclined sieve plate. The grading motor is signal-connected to the controller.

[0034] The beneficial effects of the basic solution are as follows: The grading motor drives the inclined sieve plate to vibrate through the cam. This vibration helps the material to form a pile and roll on the inclined sieve plate, thereby improving the screening efficiency. At the same time, the precise control of the cam can ensure that the inclined sieve plate vibrates according to a predetermined motion law, further improving the screening accuracy. The design of the guiding chute enables the material to flow smoothly onto the inclined sieve plate, avoiding blockage and accumulation of the material during the screening process. At the same time, the inclination angle and length of the guiding chute can be adjusted according to the characteristics of the material and the screening requirements to optimize the screening effect. The size of the sieve holes on the inclined sieve plate can be adjusted as needed to achieve multi-stage screening. This design can ensure that the material is accurately divided into different particle size grades to meet different requirements in the production process.

[0035] Furthermore, the fine powder recovery assembly includes a fine powder recovery pipe. One end of the fine powder recovery pipe is communicated with the outlet on the left side of the inclined sieve plate, and the other end is communicated with the side wall of the storage hopper. A second pneumatic transport pump is provided on the fine powder recovery pipe. The second pneumatic transport pump is signal-connected to the controller.

[0036] The beneficial effects of the basic solution are as follows: The fine powder recovery assembly is signal-connected to the controller through the second pneumatic transport pump, realizing the automatic recovery of fine powder. When fine powder is discharged from the outlet under the inclined sieve plate, the controller can automatically start the second pneumatic transport pump to transport the fine powder to the storage hopper through the fine powder recovery pipe. This automatic recovery method greatly improves the recovery efficiency and reduces the complexity and error of manual operation.

[0037] A dry granulation method for traditional Chinese medicine formula granules includes the following steps:

[0038] Step 1, material storage: Add the drug powders with corresponding types and ratios according to the traditional Chinese medicine formula into the storage hopper at the same time;

[0039] Step 2, stirring: The controller turns on the stirring motor, so that the powder is pushed by the inner spiral arc plate and the outer spiral arc plate when passing through the stirring arc plate in the stirring channel, and is stirred by the stirring rod and the stirring plate;

[0040] Step 3, Detection: The mixed drug powder on the lowermost stirring arc plate is pushed to pass through the sampling column and falls onto the powder valve. After the sampling groove is filled with the mixed drug powder, the controller controls the electric push rod to pull out the sampling column, align the sampling groove with the sampling ring. The pressure sensor detects the weight of the mixed drug powder in the sampling groove, and the air pump pumps inert gas into the sampling groove. According to the pumping volume and air pressure, the volume of the mixed drug powder is detected. The controller calculates the average density of the mixed drug powder and uses this as an indicator of whether the drug is evenly mixed. After the detection, the electric push rod pushes the sampling column in, and the detection motor rotates to pour the mixed drug powder into the stirring channel;

[0041] If the density meets the standard, the controller opens the powder valve to discharge the mixed drug powder into the feeding hopper;

[0042] If the density does not meet the standard, the controller opens the first pneumatic transport pump to suck the non-compliant mixed drug powder accumulated above the powder valve into the storage hopper through the storage recovery pipe for re-stirring and mixing;

[0043] Step 4, Feeding and Tableting: The controller turns on the feeding motor. When the feeding motor rotates the feeding screw to extrude and push the mixed drug powder into the tableting process, at the same time, the controller turns on the tableting motor. The tableting motor rotates the tableting shaft to press the pushed-in mixed drug powder into tablets through the tableting groove;

[0044] Step 5, Granulating: The controller turns on the granulating motor. The tablets falling into the granulating chamber are ground into traditional Chinese medicine granules of a preset size by the cooperating rotating rollers. The traditional Chinese medicine granules are screened through the sieve plate, and the remaining non-compliant granules continue to be ground by the rollers;

[0045] Step 6, Classification and Recycling: The controller turns on the classification motor. The classification motor rotates the cam to collide with the inclined sieve plate, so that the drug powder attached to the traditional Chinese medicine granules on the inclined sieve plate falls to the lower layer of the inclined sieve plate. The traditional Chinese medicine granules slide down along the inclined sieve plate and enter the grain outlet pipe to become the granulation finished products. The drug powder slides along the bottom wall of the guiding inclined groove and enters the powder recovery pipe. The controller turns on the second pneumatic transport pump to blow the drug powder into the storage hopper through the powder recovery pipe for repeated use. Description of the Drawings

[0046] Figure 1 It is an axonometric view of the dry granulation device for traditional Chinese medicine formula granules in the embodiment of the present invention;

[0047] Figure 2 It is a side sectional view of the stirring assembly of the dry granulation device for traditional Chinese medicine formula granules in the embodiment of the present invention;

[0048] Figure 3 It is a side sectional view of the classification assembly of the dry granulation device for traditional Chinese medicine formula granules in the embodiment of the present invention;

[0049] Figure 4Schematic diagram of the dry granulation method for traditional Chinese medicine formula granules in the embodiments of the present invention.

[0050] Reference numerals in the accompanying drawings of the specification include: 1, frame; 2, controller; 3, powder recovery pipe; 4, guiding inclined groove; 5, granule outlet pipe; 6, granule sizing chamber; 7, tablet pressing chamber; 8, feeding hopper; 9, feeding motor; 10, storage material recovery pipe; 11, first pneumatic conveying pump; 12, storage hopper; 13, stirring channel; 14, stirring motor; 15, stirring arc plate; 16, air pump; 17, detection motor; 18, air storage tank; 19, detection pipe; 20, tablet pressing motor; 21, second pneumatic conveying pump; 22, stirring rod; 23, inner spiral arc plate; 24, stirring bar; 25, outer spiral arc plate; 26, stirring plate; 27, sampling column; 28, sampling groove; 29, detection ring; 30, electric push rod; 31, pressure sensor; 32, powder valve; 33, granule outlet; 34, inclined sieve plate; 35, cam; 36, sieve mesh. Detailed implementation manners

[0051] The following is further detailed through specific implementation manners:

[0052] Embodiment 1

[0053] Basically as shown in the appendix Figure 1 and Figure 2 shown: A dry granulation device for traditional Chinese medicine formula granules includes a storage hopper 12. The bottom of the storage hopper 12 is communicated with a stirring assembly. A frame 1 is welded outside the storage hopper 12. The stirring assembly includes a stirring channel 13, and the stirring channel 13 is communicated with the storage hopper 12, as Figure 2As shown in the figure, a number of stirring arc plates 15 are fixedly connected to the inner wall of the stirring channel 13. Adjacent stirring arc plates 15 are respectively welded to the inner wall of the opposite side of the stirring channel 13. A number of stirring rods 22 are rotatably connected to the inner wall of the stirring channel 13 and are respectively located above the stirring arc plates 15. The stirring rods 22 all pass through the stirring channel 13 and a stirring motor 14 output shaft is coaxially welded to one side of each of them. Inner spiral arc plates 23 and outer spiral arc plates 25 are sleeved on the stirring rods 22. A number of stirring rods 24 are perpendicularly welded to the stirring rods 22. One end of each stirring rod 24 far from the stirring rod 22 is welded to the corresponding outer spiral arc plate 25, and one end of each stirring rod 24 close to the stirring rod 22 is welded to the corresponding inner spiral arc plate 23. A number of stirring plates 26 are welded to both sides of the outer edge of the outer spiral arc plate 25. A powder valve 32 is installed at the bottom of the stirring channel 13. A detection component is welded to one side of the bottom of the stirring channel 13. The detection component is used to detect whether the density of the mixed medicinal powder after stirring reaches the standard of being evenly mixed. The detection component includes a detection tube 19. The detection tube 19 is welded to one side of the stirring channel 13. A detection motor 17 is welded to the end of the detection tube 19 far from the stirring channel 13. The output shaft of the detection motor 17 extends into the detection tube 19 and a push rod 30 is coaxially welded to it. The end of the output shaft of the push rod 30 is welded with a sampling column 27. The sampling column 27 passes through the side wall of the stirring channel 13 and is slidably matched with the side wall of the stirring channel 13. A sampling groove 28 is formed on the sampling column 27. A pressure sensor 31 is laid on the inner bottom wall of the sampling groove 28. A detection ring 29 is welded in the detection tube 19. The inner wall of the detection ring 29 is slidably matched with the sampling column 27. A detection through hole is formed on the inner top wall of the detection ring 29. The detection through hole extends upward through the detection tube 19 and is communicated with the output end of an air pump 16. The input end of the air pump 16 is communicated with an air storage tank 18. An air pressure sensor is installed on the air pump 16. The stirring arc plate 15 close to the sampling column 27 is welded to the inner wall of the stirring channel 13 on the opposite side of the sampling column 27.

[0054] A storage and recovery component is communicated with one side of the bottom of the stirring channel 13. The storage and recovery component is used to pump the unqualified mixed medicinal powder back to the storage hopper 12 for re-stirring. The storage and recovery component includes a storage and recovery pipe 10. One end of the storage and recovery pipe 10 is communicated with the side wall of the bottom of the stirring channel 13, and the other end is communicated with the side wall of the storage hopper 12. A first pneumatic transport pump 11 is installed on the storage and recovery pipe 10.

[0055] A controller 2 is fixedly connected to one side of the frame 1. The stirring motor 14, the powder valve 32, the detection motor 17, the push rod 30, the pressure sensor 31, the air pump 16, the air pressure sensor and the first pneumatic transport pump 11 are all in signal connection with the controller 2.

[0056] The specific implementation process is as follows: Since traditional Chinese medicine powder with a large density difference may show a layering phenomenon during the dry granulation process, in order to ensure that the mixed powder is evenly mixed before tabletting granulation, a powder stirring structure and a powder uniformity detection device need to be added above the feeder to ensure the quality of dry granulation production.

[0057] First, all the powder raw materials of the mixed powder are put into the storage hopper 12 at the same time. After the powder raw materials enter the stirring channel 13, they accumulate on the uppermost stirring arc plate 15. At this time, the controller 2 controls the stirring motor 14 to start. The stirring motor 14 drives the stirring rod 22 to rotate, and the stirring rods 24, the inner spiral arc plate 23, the outer spiral arc plate 25, and the stirring plate 26 on the stirring rod 22 all rotate. Among them, the inner spiral arc plate 23 and the outer spiral arc plate 25 can play a role in pushing the mixed powder to move on the stirring arc plate 15. The mixed powder falls from the upper stirring arc plate 15 to the lower stirring arc plate 15 and is pushed in the opposite direction, thereby extending the stirring path of the mixed powder and making the powder fully stirred. During this pushing process, the mixed powder will be lifted by the stirring plate 26 and fall repeatedly. Part of the mixed powder will leak out from the gap between the inner spiral arc plate 23 and the outer spiral arc plate 25 and be stirred by the stirring rod 22, so that the powder between the two layers of spirals on the stirring rod 22 is mixed, and the powder is stirred more fully.

[0058] The fully stirred mixed powder is pushed from the lowermost stirring arc plate 15 onto the sampling column 27 and accumulates on the powder valve 32. The mixed powder falling on the sampling column 27 enters the sampling groove 28. When the predetermined sampling amount is reached, the pressure sensor 31 senses, and the controller 2 controls the electric push rod 30 to pull back the sampling column 27. The sampling column 27 will always block the side wall of the stirring channel 13 to avoid powder leakage. The sampling groove 28 on the pulled-back sampling column 27 corresponds to the detection ring 29. At this time, the pressure sensor 31 detects the powder quality in the sampling groove 28 again. After the detection, inert gas pumped by the air pump 16 is introduced into the detection through hole on the top wall of the detection ring 29. The inert gas is stored in the gas storage tank 18. The inert gas can reduce the probability of reacting with the active ingredients of the mixed powder and avoid the materials of the mixed powder. The air pressure sensor on the air pump 16 senses the air pressure after introducing the inert gas and obtains the volume of the introduced inert gas. The volume of the mixed powder sample can be obtained by subtracting the volume of the inert gas from the preset value. Combining the mass of the mixed powder sample sensed by the pressure sensor 31, the average density of the mixed powder sample at this time can be obtained. The calculation formula is as follows:

[0059]

[0060] Wherein, ρ is the average density of the mixed powder sample, m is the mass of the mixed powder in the sampling tank 28, V1 is the amount of gas used by the air pump 16 to introduce an inert gas into the empty sampling tank 28 to reach a predetermined air pressure, and V2 is the amount of gas used by the air pump 16 to introduce an inert gas into the sampling tank 28 containing the mixed powder sample to reach a predetermined air pressure.

[0061] This method can accurately detect the density of the mixed powder sample. By comparing the obtained density with the preset density, it can be determined whether the powder is evenly mixed. If the density is too large or too small, the mixed powder is not evenly mixed. At this time, the controller 2 controls the first pneumatic transport pump 11 to pass the mixed powder accumulated on the powder valve 32 into the storage hopper 12 through the storage recovery pipe 10, and repeat the stirring until the detected density of the mixed powder reaches the allowable error range. Then, the controller 2 opens the powder valve 32 to put the mixed powder into the next process, ensuring that the mixed powder input into the granulation process is evenly mixed enough to guarantee the production quality of the traditional Chinese medicine granule products.

[0062] Embodiment 2

[0063] The difference from the above embodiment is that, as shown in the attached Figure 1 and Figure 3 figures: A feeding assembly is connected to the bottom of the stirring channel 13. The feeding assembly is used to push the mixed powder into the next process. The feeding assembly includes a feeding hopper 8. A feeding screw is installed in the feeding hopper 8. The top wall of the feeding hopper 8 is welded with a feeding motor 9. The output shaft of the feeding motor 9 extends downward through the top wall of the feeding hopper 8 and is coaxially welded with the feeding screw. One side of the top wall of the feeding hopper 8 is connected to the stirring channel 13.

[0064] The bottom of the feeding hopper 8 is connected to a tablet pressing assembly. The tablet pressing assembly is used to press the mixed powder into tablets. The tablet pressing assembly includes a tablet pressing chamber 7. The top of the tablet pressing chamber 7 is connected to the bottom of the feeding hopper 8. Parallel and symmetric tablet pressing shafts are provided in the tablet pressing chamber 7. Corresponding tablet pressing grooves are opened on the tablet pressing shafts. Symmetric tablet pressing motors 20 are welded to one side of the tablet pressing chamber 7. The output shafts of the tablet pressing motors 20 all pass through the side wall of the tablet pressing chamber 7 and are coaxially welded to the corresponding tablet pressing shafts.

[0065] The bottom of the tablet pressing chamber 7 is connected to a granulating assembly. The granulating assembly is used to crush the tablets into traditional Chinese medicine granules of a preset size. The granulating assembly includes a granulating chamber 6. The top of the granulating chamber 6 is connected to the bottom of the tablet pressing chamber 7. A screen 36 is laid at the bottom of the granulating chamber 6. A number of grinding rollers are installed in the granulating chamber 6. The grinding rollers rotate in cooperation with each other. A number of granulating motors are welded to one side of the granulating chamber 6. The output shafts of the granulating motors all pass through the side wall of the granulating chamber 6 and are respectively coaxially welded to the corresponding grinding rollers.

[0066] The bottom of the granulating chamber 6 is connected to a grading sieve assembly. The grading sieve assembly is used to separate the finished traditional Chinese medicine granules and the attached powder. The grading sieve assembly includes a guiding chute 4, as shown in Figure 3As shown in the figure, the top of the guiding chute 4 is connected to the granulating chamber 6. An inclined sieve plate 34 parallel to the top wall of the guiding chute 4 is laid in the guiding chute 4. The inclined sieve plate 34 is elastic. A grading motor is welded to the side wall of the guiding chute 4. The output shaft of the grading motor passes through the side wall of the guiding chute 4 and is welded with a cam 35. The inclined sieve plate 34 is located on the rotation track of the cam 35. An outlet 33 is opened at the bottom of the guiding chute 4. The outlet 33 is divided into left and right parts by the inclined sieve plate 34. The outlet 33 on the right side of the inclined sieve plate 34 is connected with a grain outlet pipe 5.

[0067] The bottom of the guiding chute 4 is connected with a powder recovery component. The powder recovery component is used to pump the attached medicinal powder back to the storage hopper 12 for reuse. The powder recovery component includes a powder recovery pipe 3. One end of the powder recovery pipe 3 is connected to the outlet 33 on the left side of the inclined sieve plate 34. The other end of the powder recovery pipe 3 is connected to the side wall of the storage hopper 12. A second pneumatic transport pump 21 is installed on the powder recovery pipe 3.

[0068] The feeding motor 9, the tabletting motor 20, the granulating motor, the grading motor and the second pneumatic transport pump 21 are all signal-connected to the controller 2.

[0069] The specific implementation process is as follows: After the mixed medicinal powder enters the feeding hopper 8, the controller 2 sequentially turns on the feeding motor 9, the tabletting motor 20, the granulating motor, the grading motor and the second pneumatic transport pump 21 to perform basic dry granulation. The medicinal powder in the feeding hopper 8 is squeezed and pushed downward by the rotation of the feeding screw and enters the tabletting chamber 7, ensuring that the mixed medicinal powder smoothly enters between the tabletting shafts under a certain pressure. The mutually matching tabletting grooves on the tabletting shafts press the mixed medicinal powder into tablets. The tablets enter the granulating chamber 6 and are ground into traditional Chinese medicine granules of a preset size by the mutual cooperation between the horizontally distributed multi-layer rolling rollers. After rolling, some over-sized granules and too small powder will be generated. Therefore, the traditional Chinese medicine granules after granulation need to pass through a screen first. The larger granules that exceed the preset standard of the traditional Chinese medicine granules are left in the granulating chamber 6 and continue to be ground by the rolling rollers until they reach the standard of the traditional Chinese medicine granules. The traditional Chinese medicine granules and the powder both fall into the guiding chute 4. The grading motor rotates the cam 35 to collide and vibrate the inclined sieve plate 34, so that the traditional Chinese medicine granules smoothly slide downward on the inclined sieve plate 34, and the powder shaken off from the traditional Chinese medicine granules also slides downward through the inclined sieve plate 34 to the bottom wall of the guiding chute 4. The traditional Chinese medicine granules slide to the end of the inclined sieve plate 34 and enter the discharge pipe, and are transported away as finished products of traditional Chinese medicine granules. The powder enters the powder recovery pipe 3 and is blown back to the storage hopper 12 by the second pneumatic transport pump 21. By reusing these powders, through automatic control and the reuse of the powder, the production efficiency and production speed are improved, the probability of stratification of the mixed medicinal powder is reduced, the occurrence of faults is reduced, at the same time, the waste of raw materials is reduced, and the production cost is reduced.

[0070] Embodiment 3

[0071] The difference from the above embodiment is that as shown in the appendix Figure 1 andFigure 4 As shown: A dry granulation method for traditional Chinese medicine formula granules, comprising the following steps:

[0072] Step 1, material storage: According to the traditional Chinese medicine formula, drug powders with corresponding types and ratios are simultaneously added into the storage hopper 12;

[0073] Step 2, stirring: The controller 2 turns on the stirring motor 14, so that the powder is pushed by the inner spiral arc plate 23 and the outer spiral arc plate 25 when passing through the stirring arc plate 15 in the stirring channel 13, and is stirred by the stirring rod 24 and the stirring plate 26;

[0074] Step 3, detection: The mixed drug powder on the lowermost stirring arc plate 15 is pushed through the sampling column 27 and falls onto the powder valve 32. After the sampling groove 28 is filled with the mixed drug powder, the controller 2 controls the electric push rod 30 to pull out the sampling column 27, align the sampling groove 28 with the sampling ring, the pressure sensor 31 detects the weight of the mixed drug powder in the sampling groove 28, the air pump 16 pumps inert gas into the sampling groove 28, the volume of the mixed drug powder is detected according to the pumping volume and air pressure, the controller 2 calculates the average density of the mixed drug powder, and uses this as an index to determine whether the drug is evenly mixed. After the detection, the electric push rod 30 pushes the sampling column 27 in, and the detection motor 17 rotates to pour the mixed drug powder into the stirring channel 13;

[0075] If the density meets the standard, the controller 2 opens the powder valve 32 to discharge the mixed drug powder into the feeding hopper 8;

[0076] If the density does not meet the standard, the controller 2 opens the first pneumatic transport pump 11 to suck the non-compliant mixed drug powder accumulated above the powder valve 32 into the storage hopper 12 through the storage recovery pipe 10 for re-stirring and mixing;

[0077] Step 4, feeding and tabletting: The controller 2 turns on the feeding motor 9. When the feeding motor 9 rotates the feeding screw to squeeze and push the mixed drug powder into the tabletting process, at the same time, the controller 2 turns on the tabletting motor 20, and the tabletting motor 20 rotates the tabletting shaft to press the pushed-in mixed drug powder into tablets through the tabletting groove;

[0078] Step 5, granule sizing: The controller 2 turns on the granule sizing motor. The tablets falling into the granule sizing chamber 6 are ground into traditional Chinese medicine granules of a preset size by the cooperating rotating rollers. The traditional Chinese medicine granules are screened through the sieve plate, and the remaining non-compliant granules are continuously ground by the rollers;

[0079] Step 6: Hierarchical recycling. The controller 2 turns on the grading motor. As the grading motor rotates, the cam 35 collides with the inclined sieve plate 34, causing the drug powder attached to the traditional Chinese medicine granules on the inclined sieve plate 34 to fall to the lower layer of the inclined sieve plate 34. The traditional Chinese medicine granules slide downward along the inclined sieve plate 34 and enter the grain outlet pipe 5 to become the granulation finished products. The drug powder slides along the bottom wall of the guiding chute 4 and enters the powder recovery pipe 3. The controller 2 turns on the second pneumatic transport pump 21 to blow the drug powder into the storage hopper 12 through the powder recovery pipe 3 for reuse.

[0080] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0081] The above are only embodiments of the present invention. Common knowledge such as the specific structures and characteristics in the solutions is not described in detail here. Those of ordinary skill in the art know all the common general technical knowledge in the technical field to which the invention belongs before the application date or the priority date, can know all the existing technologies in this field, and have the ability to apply the conventional experimental means before this date. Those of ordinary skill in the art can, under the inspiration given in this application, combine their own abilities to complete and implement this solution. Some typical well-known structures or well-known methods should not become an obstacle for those of ordinary skill in the art to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to interpret the content of the claims.

Claims

1. A dry granulation device for Chinese medicine granules, comprising a storage hopper (12), characterized in that: The bottom of the storage hopper (12) is connected to a stirring assembly, and the outer side of the storage hopper (12) is fixedly connected to a frame (1), and the stirring assembly includes a stirring channel (13), the stirring channel (13) is connected to the storage hopper (12), and the inner wall of the stirring channel (13) is fixedly connected to a plurality of stirring arc plates (15), and adjacent stirring arc plates (15) are respectively fixedly connected to the inner wall of the stirring channel (13) on the opposite side, and the inner wall of the stirring channel (13) is rotatably connected to a plurality of stirring rods (22) respectively located above the stirring arc plates (15), and the stirring rods (22) all pass through the stirring channel (13) ) and one side is coaxially fixedly connected with the output shaft of the stirring motor (14), the stirring rod (22) is sleeved with an inner spiral arc plate (23) and an outer spiral arc plate (25), a plurality of stirring rods (24) are vertically fixedly connected to the stirring rod (22), one end of the stirring rod (24) away from the stirring rod (22) is fixedly connected to the corresponding outer spiral arc plate (25), one end of the stirring rod (24) close to the stirring rod (22) is fixedly connected to the corresponding inner spiral arc plate (23), and both sides of the outer edge of the outer spiral arc plate (25) are fixedly connected to a plurality of stirring plates (26); The bottom of the stirring channel (13) is connected to a feeding component, a powder valve (32) is provided at the bottom of the stirring channel (13), a detection component is fixedly connected to one side of the bottom of the stirring channel (13), one side of the bottom of the stirring channel (13) is connected to a storage recovery component, the bottom of the feeding component is connected to a tablet pressing component, the bottom of the tablet pressing component is connected to a granulation component, the bottom of the granulation component is connected to a grading screen component, the grading screen component is connected to a powder recovery component, and the other ends of the powder recovery component and the storage recovery component are both connected to the storage hopper (12); The detection component is used to detect whether the density of the mixed powder after stirring reaches the standard of uniform mixing, the storage recovery component is used to pump the mixed powder that does not meet the standard back to the storage hopper (12) for re-stirring, the feeding component is used to push the mixed powder into the tablet pressing component, the tablet pressing component is used to press the mixed powder into tablets, the whole particle component is used to crush the tablets into Chinese medicine particles of a preset size, the grading screen component is used to separate the finished Chinese medicine particles and the attached powder, and the powder recovery component is used to pump the attached powder back to the storage hopper (12) for reuse; A controller (2) is fixedly connected to one side of the frame (1), and a stirring motor (14), a powder valve (32), a feeding assembly, a detection assembly, a storage recovery assembly, a tabletting assembly, a granulation assembly, a grading screen assembly and a powder recovery assembly are all connected to the controller (2) by signals.

2. The dry granulation device for Chinese medicine granules according to claim 1, characterized in that: The feeding assembly comprises a feeding hopper (8), a feeding screw is arranged in the feeding hopper (8), a feeding motor (9) is fixedly connected to the top wall of the feeding hopper (8), an output shaft of the feeding motor (9) extends downward through the top wall of the feeding hopper (8) and is coaxially fixedly connected to the feeding screw, one side of the top wall of the feeding hopper (8) is connected to the stirring channel (13), and the feeding motor (9) is connected to the controller (2) by signal.

3. The dry granulation device for Chinese medicine granules according to claim 1, characterized in that: The detection assembly comprises a detection tube (19), the detection tube (19) is fixedly connected to one side of the stirring channel (13), the end of the detection tube (19) away from the stirring channel (13) is fixedly connected to a detection motor (17), the output shaft of the detection motor (17) extends into the detection tube (19) and is coaxially fixedly connected to an electric push rod (30), the end of the output shaft of the electric push rod (30) is fixedly connected to a sampling column (27), the sampling column (27) passes through the side wall of the stirring channel (13) and is slidably matched with the side wall of the stirring channel (13), the sampling column (27) is provided with a sampling groove (28), and the sampling groove (28) ) is provided with a pressure sensor (31) on the inner bottom wall, a detection ring (29) is fixedly connected inside the detection tube (19), the inner wall of the detection ring (29) is slidably matched with the sampling column (27), a detection through hole is opened on the inner top wall of the detection ring (29), the detection through hole extends upward through the detection tube (19) and is connected to the output end of the air pump (16), the input end of the air pump (16) is connected to the air storage tank (18), an air pressure sensor is provided on the air pump (16), and the detection motor (17), the electric push rod (30), the pressure sensor (31), the air pump (16) and the air pressure sensor are all connected to the controller (2) for signal.

4. The dry granulation device for Chinese medicine granules according to claim 1, characterized in that: The stirring arc plate (15) close to the sampling column (27) is fixedly connected to the inner wall of the stirring channel (13) on the opposite side of the sampling column (27).

5. The dry granulation device for Chinese medicine granules according to claim 1, characterized in that: The material storage recovery component comprises a material storage recovery pipe (10), one end of which is in communication with the bottom side wall of the stirring channel (13), and the other end of which is in communication with the side wall of the material storage hopper (12). A first pneumatic transport pump (11) is provided on the material storage recovery pipe (10), and the first pneumatic transport pump (11) is connected to the controller (2) by signal.

6. The dry granulation device for Chinese medicine granules according to claim 1, characterized in that: The tablet pressing assembly comprises a tablet pressing chamber (7), the top of the tablet pressing chamber (7) is connected to the bottom of the feeding hopper (8), parallel and symmetrical tablet pressing shafts are arranged in the tablet pressing chamber (7), and the tablet pressing shafts are provided with corresponding tablet pressing grooves, and symmetrical tablet pressing motors (20) are fixedly connected to one side of the tablet pressing chamber (7), and the output shafts of the tablet pressing motors (20) pass through the side walls of the tablet pressing chamber (7) and are coaxially fixedly connected to the corresponding tablet pressing shafts, and the tablet pressing motors (20) are connected to the controller (2) for signal.

7. The dry granulation device for Chinese medicine granules according to claim 11, characterized in that: The granulation assembly comprises a granulation chamber (6), the top of the granulation chamber (6) is connected to the bottom of the tableting chamber (7), a screen (36) is laid on the bottom of the granulation chamber (6), a plurality of rollers are arranged in the granulation chamber (6), the rollers rotate in coordination with each other, a plurality of granulation motors are fixedly connected to one side of the granulation chamber (6), the output shafts of the granulation motors all pass through the side wall of the granulation chamber (6) and are respectively coaxially fixedly connected to the corresponding rollers, and the granulation motors are all connected to the controller (2) for signal.

8. The dry granulation device for Chinese medicine granules according to claim 1, characterized in that: The grading screen assembly comprises a guide chute (4), the top of the guide chute (4) is connected to a particle size adjustment chamber (6), an inclined screen plate (34) parallel to the top wall of the guide chute (4) is laid in the guide chute (4), the inclined screen plate (34) is elastic, a grading motor is fixedly connected to the side wall of the guide chute (4), an output shaft of the grading motor passes through the side wall of the guide chute (4) and is fixedly connected to a cam (35), the inclined screen plate (34) is located on the rotation track of the cam (35), a particle outlet (33) is opened at the bottom of the guide chute (4), the particle outlet (33) is divided into left and right parts by the inclined screen plate (34), the particle outlet (33) on the right side of the inclined screen plate (34) is connected to a particle outlet pipe (5), and the grading motor is signal-connected to a controller (2).

9. The dry granulation device for Chinese medicine granules according to claim 1, characterized in that: The powder recovery component comprises a powder recovery pipe (3), one end of which is connected to a particle outlet (33) on the left side of the inclined screen plate (34), and the other end of which is connected to a side wall of a storage hopper (12). A second pneumatic transport pump (21) is provided on the powder recovery pipe (3), and the second pneumatic transport pump (21) is connected to a controller (2) by signal.

10. A dry granulation method for Chinese medicine granules, characterized in that: The following steps are involved: Step 1, material storage: according to the Chinese medicine formula, medicine powders of corresponding types and proportions are added into the storage hopper (12) at the same time; Step 2, stirring: the controller (2) turns on the stirring motor (14), so that the powder is pushed by the inner spiral arc plate (23) and the outer spiral arc plate (25) when passing through the stirring arc plate (15) in the stirring channel (13), and is stirred by the stirring rod (24) and the stirring plate (26); Step 3, detection: the mixed drug powder on the bottom stirring arc plate (15) is pushed through the sampling column (27) and falls onto the powder valve (32). After the mixed drug powder fills the sampling slot (28), the controller (2) controls the electric push rod (30) to pull out the sampling column (27) and align the sampling slot (28) with the sampling ring. The pressure sensor (31) detects the weight of the mixed drug powder in the sampling slot (28). The air pump (16) pumps inert gas into the sampling slot (28). The volume of the mixed drug powder is detected according to the pumped amount and the air pressure. The controller (2) calculates the average density of the mixed drug powder and uses it as an indicator of whether the drugs are mixed uniformly. After the detection, the electric push rod (30) pushes the sampling column (27) in, and the detection motor (17) rotates to pour the mixed drug powder into the stirring channel (13); If the density reaches the standard, the controller (2) opens the powder valve (32) to discharge the mixed drug powder into the feeding hopper (8); If the density does not meet the standard, the controller (2) turns on the first pneumatic transport pump (11) to suck the substandard mixed powder accumulated above the powder valve (32) into the storage hopper (12) through the storage recovery pipe (10) for re-stirring and mixing; Step 4, feeding and tableting, the controller (2) turns on the feeding motor (9), the feeding motor (9) rotates the feeding screw to squeeze and push the mixed powder into the tablet, and at the same time the controller (2) turns on the tableting motor (20), the tableting motor (20) rotates the tableting shaft to press the pushed mixed powder into tablets through the tableting groove; Step 5: Granulation: the controller (2) turns on the granulation motor, and the tablets falling into the granulation chamber (6) are crushed into Chinese medicine particles of a preset size by the rollers that rotate in coordination with each other. The Chinese medicine particles are screened through a sieve plate, and the remaining particles that do not meet the standards are further crushed by the rollers; Step six, classification and recovery, the controller (2) turns on the classification motor, the classification motor rotates the cam (35) to collide with the inclined screen plate (34), so that the medicinal powder attached to the Chinese medicine particles on the inclined screen plate (34) falls into the lower layer of the inclined screen plate (34), and the Chinese medicine particles slide downward along the inclined screen plate (34) into the granulation tube (5) to become the finished granulation product, and the medicinal powder slides along the bottom wall of the guide chute (4) into the red powder recovery tube (3), and the controller (2) turns on the second pneumatic transport pump (21) to blow the medicinal powder into the storage hopper (12) through the red powder recovery tube (3) for repeated use.

Images