Chinese herbal medicine raw material powder preparation device and equipment

Abstract

The present application relates to the field of Chinese herbal medicine raw material powder preparation, in particular to a Chinese herbal medicine raw material powder preparation device and equipment, which comprises a grinding shell provided with a feed inlet on the side wall and a grinding unit; the bottom of the grinding shell is funnel-shaped structure, the grinding unit is in contact with the bottom of the grinding shell and forms a grinding area, the grinding area is annular structure, the powder preparation device further comprises: an inner ring sleeve fixedly sleeved on the periphery of the grinding unit, the inner wall of the inner ring sleeve and the outer side of the grinding unit form an air inlet channel; an outer ring sleeve fixedly sleeved on the periphery of the inner ring sleeve, the inner side of the outer ring sleeve and the outer side of the inner ring sleeve constitute an air exhaust channel, the outer side of the outer ring sleeve and the inner wall of the grinding shell have a feeding channel communicated with the feed inlet. The present application improves the powder conveying efficiency, reduces the energy consumption, and guarantees the efficiency and efficacy of powder preparation.

Description

Technical Field

[0001] This invention relates to the field of preparation of Chinese herbal medicine raw material powders, specifically to a Chinese herbal medicine raw material powder preparation apparatus and equipment. Background Technology

[0002] There are various existing methods for preparing powdered Chinese herbal medicines, such as grinding, pressing, and milling. The finer the powder, the easier it is to extract the medicinal effects during subsequent pharmaceutical manufacturing. However, during preparation, the temperature of the Chinese herbal medicines will continuously rise after being subjected to external mechanical forces, which will cause the medicinal effects to be destroyed during the powdering process.

[0003] Chinese Patent Publication No. CN104383982B discloses a device for preparing powdered traditional Chinese medicine raw materials. The device includes a housing mounted on a frame, a drive shaft penetrating the housing and mounted on the frame, a drive wheel mounted on the drive shaft, a feed hopper mounted on the housing, and an iron removal device in the feed hopper. A first-stage grinding hammer, a second-stage grinding hammer, a third-stage grinding hammer, and a gas conveying device are sequentially arranged on the drive shaft inside the housing. The first-stage grinding hammer includes a first hammer body fixedly connected to the drive shaft and a rectangular hammer head fixedly connected to the outside of the first hammer body. The rectangular hammer head is inclined relative to the first hammer body. The angle is 20-45 degrees. A grinding table is provided inside the casing corresponding to the first-stage grinding hammer. The grinding table has a hollow trapezoidal cross-section. Multiple cooling pipes are provided on the inner side of the grinding table. The cooling pipes are connected to the cooling water tank outside the casing through pipes. A partition is provided between the third-stage grinding hammer and the air conveying device. A return grinding groove is provided between the partition and the third-stage grinding hammer. The casing is further provided with a powder sorting chamber. The powder sorting chamber is connected to the air conveying device through an arc-shaped sorting chamber channel. A reversing partition is provided at the outlet of the sorting chamber channel. A coarse powder return pipe is provided between the powder sorting chamber and the second-stage grinding hammer.

[0004] The above-mentioned solution uses flowing air to cool and transport the powder. However, the grinding unit in this solution is horizontally positioned. After the herbal medicine is added from one side, it can only move within the grinding unit under the influence of airflow. If the herbal medicine particles are large, they may not be able to pass through multiple stations within the grinding unit sequentially. Furthermore, due to the horizontal positioning of the grinding unit, the powdered herbal medicine is located at the bottom. The grinding structure within the unit disturbs the horizontal airflow during operation, making it difficult for the airflow to lift the powder at the bottom of the unit. This results in low powder transport efficiency and high energy consumption. Additionally, freshly ground herbal medicine powder tends to stick to the bottom surface of the grinding unit and is difficult to remove without external force. Long-term adhered powder is repeatedly ground by the grinding structure, leading to excessively high temperatures and loss of efficacy, resulting in significant losses during powder preparation. Summary of the Invention

[0005] To address the aforementioned issues, a device and equipment for preparing powdered Chinese herbal medicine raw materials is provided. By setting the bottom of the grinding shell into a funnel-shaped structure, and combining it with an inner ring, an outer ring, and a first and second fan with the same operating power, an annular grinding area and a stable airflow from the inner ring to the outer ring are constructed. This effectively solves the drawbacks of the horizontal setting of the grinding unit in existing devices, ensuring that all Chinese herbal medicine raw materials can enter the grinding area and be fully ground. At the same time, the airflow can promptly carry away the powder, reduce the grinding temperature, avoid powder accumulation, and prevent the loss of efficacy and damage caused by repeated grinding. This improves the powder conveying efficiency and reduces energy consumption.

[0006] To address the problems of existing technologies, the present invention provides a device for preparing powdered Chinese herbal medicine raw materials, including a grinding shell with a feed inlet on its side wall and a grinding unit;

[0007] The bottom of the grinding shell has a funnel-shaped structure, and the grinding unit contacts the bottom of the grinding shell to form a grinding area. The grinding area has a ring-shaped structure. The powder preparation device also includes:

[0008] An inner ring sleeve is fixedly fitted around the periphery of the grinding unit. The inner wall of the inner ring sleeve and the outer side of the grinding unit form an air inlet channel. The outer side of the air inlet channel is connected to a first fan that can discharge filtered air from the outside into the air inlet channel.

[0009] The first outer ring sleeve (4) is fixedly sleeved around the outer periphery of the inner ring sleeve. The inner side of the first outer ring sleeve (4) and the outer side of the inner ring sleeve form an exhaust channel. The outer side of the exhaust channel is connected to a second fan that draws out the air in the exhaust channel. The operating power of the first fan and the second fan is always the same. The outer side of the first outer ring sleeve (4) and the inner wall of the grinding shell have a feeding channel that communicates with the feed port.

[0010] Preferably, a first filter screen is horizontally arranged in the exhaust duct. The first filter screen has a ring structure and completely covers the horizontal cross-section of the exhaust duct. The first filter screen can intercept Chinese herbal medicine raw materials that have not been turned into powder.

[0011] Preferably, the grinding unit includes:

[0012] A rotating shaft is rotatably disposed within the grinding shell along the axis of the grinding shell;

[0013] A ventilation slot is vertically formed in the rotating shaft and communicates with the air inlet channel;

[0014] A drive unit is disposed on one side of the rotating shaft and is used to drive the rotating shaft to rotate.

[0015] Preferably, a second filter screen is horizontally arranged in the air inlet channel, the second filter screen completely covers the horizontal cross section of the air inlet channel, and the second filter screen can intercept powder.

[0016] Preferably, a pressure roller is provided on the outer side of the rotating shaft, which rotates synchronously with the rotating shaft, and the grinding area is formed by the rolling engagement of the pressure roller and the bottom of the grinding shell.

[0017] Preferably, a scraper is provided on one side of the pressure roller, which rotates synchronously with the rotating shaft. The scraper slides with the bottom of the grinding shell to form a scraping area, which coincides with the grinding area.

[0018] Preferably, the bottom of the grinding shell is vertically provided with an upwardly extending extension sleeve, and the lower end of the rotating shaft extends into the extension sleeve.

[0019] Preferably, a second outer ring is rotatably sleeved on the outer side of the upper part of the first outer ring sleeve. The second outer ring sleeve is fixedly connected to the grinding shell. An exhaust pipe is horizontally arranged on the side wall of the second outer ring sleeve, penetrating the side wall of the grinding shell. The exhaust pipe is connected to the exhaust channel.

[0020] Preferably, the bottom of the grinding shell has a built-in liquid cooling pipeline.

[0021] A device for preparing powdered raw materials of traditional Chinese medicine includes a powder preparation apparatus, a sealed feeding device, and a collection unit.

[0022] The advantages of this invention compared to the prior art are:

[0023] 1. This invention constructs an annular grinding area and a stable airflow from the inner ring to the outer ring by setting the bottom of the grinding shell into a funnel-shaped structure, combined with an inner ring, an outer ring, and a first fan and a second fan with the same operating power. This effectively solves the drawback of the horizontal setting of the grinding unit in existing devices, ensuring that all Chinese herbal raw materials can enter the grinding area and be fully ground. At the same time, the airflow can carry away the powder in time, reduce the grinding temperature, avoid the accumulation of powder, and prevent the loss of efficacy and damage caused by repeated grinding. This improves the powder conveying efficiency, reduces energy consumption, and ensures the efficiency and efficacy of powder preparation.

[0024] 2. By setting up a full-coverage annular first filter in the exhaust channel and a full-coverage second filter in the air inlet channel, the incompletely ground raw materials and powders can be accurately intercepted. This ensures the purity of the discharged powders, reduces subsequent screening processes, and enables the first filter to self-clean when the airflow reverses, preventing powder from clogging the ventilation slots, protecting the internal structure of the device, improving the stability and reliability of the device's operation, and reducing the waste of Chinese herbal medicine raw materials.

[0025] 3. By setting up a rotating shaft with pressure rollers and scrapers, a bottom extension sleeve, a rotating double outer ring sleeve, and built-in liquid cooling pipelines, the grinding structure and device sealing are optimized, achieving uniform roller grinding, timely scraping of residual materials, stable support for the rotating shaft, and smooth discharge of powder. At the same time, it forms a dual cooling effect of airflow and liquid cooling, further avoiding damage to the efficacy of medicines by high grinding temperatures, extending the service life of the device, adapting to the grinding needs of different Chinese herbal medicines, and comprehensively improving the quality of powder preparation. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a device for preparing powdered Chinese herbal medicine raw materials according to the present invention.

[0027] Figure 2 This is a three-dimensional schematic diagram of a part of the herbal raw material powder preparation device of the present invention after an explosion.

[0028] Figure 3 This is a side view of a traditional Chinese medicine raw material powder preparation device according to the present invention.

[0029] Figure 4 This invention relates to a device for preparing powdered Chinese herbal medicine raw materials. Figure 3 Schematic diagram of cross-section at point AA.

[0030] Figure 5 This is a cross-sectional perspective view of a traditional Chinese medicine raw material powder preparation device according to the present invention. Figure 1 .

[0031] Figure 6 This invention relates to a device for preparing powdered Chinese herbal medicine raw materials. Figure 5 A magnified view of a portion of point B in the middle.

[0032] Figure 7 This is a cross-sectional perspective view of a traditional Chinese medicine raw material powder preparation device according to the present invention. Figure 2 .

[0033] Figure 8 This invention relates to a device for preparing powdered Chinese herbal medicine raw materials. Figure 7 A magnified view of a portion of point C.

[0034] The following are the labels in the diagram: 1. Grinding shell; 11. Feed inlet; 12. Extension sleeve; 13. Liquid cooling pipeline; 2. Grinding unit; 21. Rotating shaft; 211. Ventilation groove; 22. Drive unit; 221. Rotary drive; 222. Gear; 223. Gear ring; 23. Pressure roller; 24. Scraper; 3. Inner ring sleeve; 31. Second filter screen; 4. First outer ring sleeve; 41. First filter screen; 5. Second outer ring sleeve; 51. Exhaust pipe. Detailed Implementation

[0035] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0036] Reference Figures 1 to 8 A device for preparing powdered raw materials of traditional Chinese medicine includes a grinding shell 1 with a feed inlet 11 on its side wall and a grinding unit 2.

[0037] The bottom of the grinding shell 1 has a funnel-shaped structure. The grinding unit 2 contacts the bottom of the grinding shell 1 and forms a grinding area. The grinding area has a ring-shaped structure. The powder preparation device also includes:

[0038] The inner ring sleeve 3 is fixedly sleeved around the grinding unit 2. The inner wall of the inner ring sleeve 3 and the outer side of the grinding unit 2 form an air inlet channel. The outer side of the air inlet channel is connected to a first fan that can discharge filtered air from the outside into the air inlet channel.

[0039] The first outer ring sleeve 4 is fixedly sleeved around the outer periphery of the inner ring sleeve 3. The inner side of the first outer ring sleeve 4 and the outer side of the inner ring sleeve 3 form an exhaust channel. The outer side of the exhaust channel is connected to a second fan that draws out the air from the exhaust channel. The operating power of the first fan and the second fan is always the same. There is a feeding channel between the outer side of the first outer ring sleeve 4 and the inner wall of the grinding shell 1, which is connected to the feed port 11.

[0040] In use, the herbal raw materials are fed into the grinding shell 1 through the feed inlet 11. The raw materials fall to the bottom of the grinding shell 1 through the feed channel. Since the bottom of the grinding shell 1 has a funnel-shaped structure and the feed channel connects the outer side of the outer ring and the inner wall of the grinding shell 1, the raw materials that have just fallen to the bottom of the grinding shell 1 will be guided by the funnel-shaped structure to move towards the center of the funnel-shaped structure and then enter the annular grinding area formed by the contact between the grinding unit 2 and the bottom of the grinding shell 1. The first fan and the second fan are started and work synchronously at the same operating power. The first fan discharges filtered air from the outside into the air intake channel formed by the inner wall of the inner ring 3 and the outer side of the grinding unit 2. The air enters the annular grinding area from the air intake channel. At the same time, the second fan extracts the air from the exhaust channel formed by the inner side of the outer ring and the outer side of the inner ring 3. With the combined action of the air intake channel and the exhaust channel, an airflow is formed in the grinding area from the inner ring to the outer ring. When grinding unit 2 is running, it grinds the Chinese herbal medicine raw materials that enter the grinding area. The powder formed by grinding is blown up by the airflow and enters the exhaust channel from the grinding area with the airflow. Finally, it is drawn out of the exhaust channel by the second fan, thus completing the preparation of the Chinese herbal medicine raw material powder.

[0041] By designing the bottom of the grinding shell 1 as a funnel-shaped structure, the added herbal raw materials can be guided towards the center, ensuring that all the raw materials can enter the annular grinding area formed by the grinding unit 2 and the bottom of the grinding shell 1. This avoids the situation where the raw materials cannot move after being added and thus cannot be ground, guaranteeing comprehensive grinding. At the same time, by setting the inner ring 3 and the outer ring to form the air inlet and exhaust channels respectively, and with the first and second fans operating at the same power, a stable airflow from the inner ring to the outer ring can be formed within the annular grinding area. This airflow can effectively cool the raw materials and powder during the grinding process. This design avoids damaging the efficacy of the medicine due to the high temperature generated during grinding, and can promptly blow the ground powder into the exhaust channel for discharge. This effectively prevents the powder from accumulating at the bottom of the grinding shell 1, avoiding the problem of excessive temperature and efficacy loss caused by long-term adhesion and repeated grinding of the powder. It also reduces losses during the powder preparation process. Furthermore, the stable airflow avoids the problem of powder being difficult to blow up due to airflow disturbance caused by the grinding structure in existing devices, thus improving the powder conveying efficiency. The consistent power of the first and second fans also ensures stable airflow, further reducing energy consumption. Overall, it improves the efficiency and quality of the preparation of Chinese herbal medicine raw material powder, and guarantees the efficacy of the powder.

[0042] Reference Figure 4 and Figure 5 A first filter screen 41 is horizontally arranged in the exhaust channel. The first filter screen 41 has a ring structure and completely covers the horizontal cross section of the exhaust channel. The first filter screen 41 can intercept Chinese herbal medicine raw materials that have not been turned into powder.

[0043] During device operation, the first and second fans work synchronously, forming an airflow from the inner ring to the outer ring within the grinding area. The airflow carries the ground powder and the unground herbal raw materials into the exhaust duct. Because a ring-shaped first filter 41 is horizontally installed in the exhaust duct, completely covering its horizontal cross-section, the first filter 41 intercepts the herbal raw materials in the airflow, blocking the unground materials on one side. Only the qualified powder is allowed to pass through the first filter 41 and be drawn out of the exhaust duct by the second fan. This design effectively solves the technical problem in existing devices where incompletely ground Chinese herbal raw materials are easily discharged with the powder, resulting in insufficient powder purity and the need for additional screening. Through the interception effect of the first filter screen 41, it is ensured that the discharged material is all powder that meets the requirements, thus improving the purity of the powder preparation. At the same time, due to the influence of gravity, only a small amount of the incompletely ground Chinese herbal raw materials will adhere to the first filter screen 41, while most of the raw materials will fall off on their own and re-enter the grinding area for secondary grinding, reducing the waste of Chinese herbal raw materials and lowering the preparation loss.

[0044] Reference Figures 2 to 5 The grinding unit 2 includes:

[0045] A rotating shaft 21 is rotatably disposed in the grinding shell 1 along the axis of the grinding shell 1;

[0046] A ventilation slot 211 is vertically formed in the rotating shaft 21 and communicates with the air inlet channel;

[0047] The drive unit 22 is disposed on one side of the rotating shaft 21 and is used to drive the rotating shaft 21 to rotate.

[0048] The drive unit 22 includes a rotary driver 221, a gear 222, and a gear ring 223. The rotary driver 221 is vertically mounted on the upper part of the grinding shell 1. The gear 222 is fixedly mounted on the output end of the rotary driver 221. The gear ring 223 is mounted on one side of the gear 222 and meshes with the gear 222. The gear ring 223 is fixedly sleeved on the periphery of the rotating shaft 21. The rotary driver 221 drives the rotating shaft 21 to rotate through the gear ring 223 and the gear 222. The rotary driver 221 is preferably a servo motor. The first fan is directly connected to the ventilation slot 211.

[0049] After the device is started, the drive unit 22 begins to work. The rotary driver 221 outputs power to drive the gear 222 at its output end to rotate. Since the gear 222 meshes with the gear ring 223 fixedly sleeved around the rotating shaft 21, the rotation of the gear 222 will drive the gear ring 223 to rotate synchronously, thereby driving the rotating shaft 21 set along the axis of the grinding shell 1 to rotate, realizing the operation of the grinding unit 2. At the same time, the vertical ventilation slot 211 in the rotating shaft 21 is connected to the air inlet channel. The first fan discharges filtered air from the outside into the air inlet channel through the ventilation slot 211, and further diffuses it to the grinding area through the air inlet channel, making the airflow more evenly distributed in the grinding area, improving the cooling effect and powder conveying efficiency. This design solves the technical problems of unstable drive and uneven airflow distribution of the existing grinding unit 2. Through the meshing transmission of gear 222 and gear ring 223, it ensures smooth rotation of the rotating shaft 21 and efficient power transmission. The rotary driver 221 uses a servo motor to achieve precise control of the rotation speed of the rotating shaft 21, which can be adapted to the grinding needs of different Chinese herbal medicine raw materials. The design of the ventilation groove 211 and the air inlet channel further optimizes the airflow path, making the cooling of the grinding area more uniform and the powder conveying smoother, thereby improving the grinding efficiency and powder quality.

[0050] Reference Figure 4 and Figure 5 A second filter screen 31 is horizontally arranged in the air inlet channel. The second filter screen 31 completely covers the horizontal cross section of the air inlet channel and can intercept powder.

[0051] The second filter 31 can intercept both powder and herbal raw materials. When the airflow direction needs to be changed to self-clean the first filter 41, the first and second fans rotate synchronously in opposite directions. Air enters the air inlet channel from the exhaust channel through the grinding area. At this time, the powder and incompletely ground herbal raw materials attached to the first filter 41 are separated from the airflow. The powder and incompletely ground herbal raw materials moving with the airflow are intercepted by the second filter 31, preventing them from entering the ventilation groove 211 of the rotating shaft 21 and causing blockage. Moreover, because the reverse rotation time is short and the amount of material carried is small, it will not cause the second filter 31 to become blocked. This setting solves the technical problem that the air inlet channel is easily blocked by impurities or powder carried by the reverse airflow, affecting the stable flow of airflow. Through the interception effect of the second filter 31, powder is prevented from entering the ventilation groove 211 and blocking it during the self-cleaning process of the powder preparation device.

[0052] Reference Figure 5 and Figure 7 The outer side of the rotating shaft 21 is provided with a pressure roller 23 that rotates synchronously with the rotating shaft 21, and the grinding area is formed by the rolling engagement of the pressure roller 23 and the bottom of the grinding shell 1.

[0053] The pressure roller 23 is in line contact with the bottom end face of the grinding shell 1. When the pressure roller 23 rotates with the rotating shaft 21, it forms an annular sweeping area, which is the grinding area.

[0054] When the drive unit 22 drives the rotating shaft 21 to rotate, the pressure roller 23 on the outer side of the rotating shaft 21 rotates synchronously with the rotating shaft 21. Since the pressure roller 23 is in line contact with the bottom end face of the grinding shell 1, and the pressure roller 23 forms an annular sweeping area when it rotates with the rotating shaft 21, this annular sweeping area is the grinding area. When the Chinese herbal medicine raw material enters this annular grinding area under the guidance of the funnel-shaped structure at the bottom of the grinding shell 1, the rotating pressure roller 23 will roll and grind the Chinese herbal medicine raw material. Through the rolling cooperation between the pressure roller 23 and the bottom of the grinding shell 1, a uniform mechanical force is applied to the Chinese herbal medicine raw material, so that the Chinese herbal medicine raw material gradually turns into powder under repeated rolling action. This design solves the technical problems of uneven grinding and insufficient grinding of Chinese herbal medicine raw materials in existing devices. The line contact design between the pressure roller 23 and the bottom of the grinding shell 1 increases the grinding contact area. The grinding area of ​​the annular sweeping zone ensures that the Chinese herbal medicine raw materials can be fully rolled, improving grinding efficiency and powder fineness. At the same time, the rolling action reduces friction during the grinding process, lowers energy consumption, and reduces the high temperature generated by grinding, further protecting the efficacy of Chinese herbal medicine.

[0055] Reference Figure 5 and Figure 7 The pressure roller 23 is provided with a scraper 24 that rotates synchronously with the rotating shaft 21 on one side. The scraper 24 slides with the bottom of the grinding shell 1 to form a scraping area, which coincides with the grinding area.

[0056] When the rotating shaft 21 rotates, the scraper 24 on one side of the pressure roller 23 rotates synchronously with the rotating shaft 21. Since the scraper 24 slides with the bottom of the grinding shell 1 and the scraping area coincides with the grinding area, after the pressure roller 23 performs roller pressing and grinding on the Chinese herbal medicine raw materials, some powder and the Chinese herbal medicine raw materials that have not been completely ground will stick to the bottom of the grinding shell 1. The scraper 24 that rotates with the rotating shaft 21 will scrape off the material at the bottom of the grinding shell 1, scraping up the powder and the raw materials that have not been completely ground, so that they are put back into the grinding area. They can be blown away by the airflow or ground again by the pressure roller 23. This design solves the technical problem in existing devices where ground powder easily sticks to the bottom of the grinding unit 2 and is difficult to be blown away by the airflow, leading to repeated grinding, damage to efficacy, and increased loss. Through the scraping action of the scraper 24, the accumulation of material at the bottom of the grinding shell 1 is effectively avoided, ensuring that the powder can be carried away by the airflow in time. The raw materials that are not fully ground can be fully ground, which reduces material loss and prevents the powder from becoming ineffective due to high temperature generated by repeated grinding. At the same time, it ensures the cleanliness of the grinding area and improves the grinding efficiency and powder quality of the device.

[0057] Reference Figure 6 The bottom of the grinding shell 1 is vertically provided with an upwardly extending extension sleeve 12, and the lower end of the rotating shaft 21 extends into the extension sleeve 12.

[0058] The rotating shaft 21 is rotatably mounted along the axis of the grinding shell 1. An extension sleeve 12, vertically mounted at the bottom of the grinding shell 1, extends upwards, with the lower end of the rotating shaft 21 extending into the extension sleeve 12. The extension sleeve 12 supports and limits the lower end of the rotating shaft 21, ensuring that the rotating shaft 21 rotates stably along the axis of the grinding shell 1 during rotation, preventing deviation or wobbling. This, in turn, ensures the stability of the grinding area formed by the pressure roller 23 and the bottom of the grinding shell 1, guaranteeing the uniformity and stability of the grinding process. Simultaneously, the extension sleeve 12 isolates the lower end of the rotating shaft 21 from the grinding area, preventing powder generated during grinding from entering the connection between the rotating shaft 21 and the grinding shell 1. This prevents powder accumulation that could cause the rotating shaft 21 to jam or wear, extending the service life of the device. This design solves the technical problems of unstable rotation and easy deviation of the rotating shaft 21 in existing devices, as well as the susceptibility of the connection area to powder blockage and wear. Through the support, limiting, and isolation functions of the extension sleeve 12, the stability and reliability of the device operation are improved, and equipment maintenance costs are reduced.

[0059] Reference Figure 4 and Figure 5 The outer side of the upper part of the first outer ring sleeve 4 is rotatably fitted with a second outer ring sleeve 5. The second outer ring sleeve 5 is fixedly connected to the grinding shell 1. An exhaust pipe 51 is horizontally arranged on the side wall of the second outer ring sleeve 5, which penetrates the side wall of the grinding shell 1. The exhaust pipe 51 is connected to the exhaust channel.

[0060] During operation, the second fan extracts air and powder from the exhaust duct. Since the second outer ring 5 is rotatably fitted onto the outer side of the first outer ring 4, and is fixedly connected to the grinding shell 1, the first outer ring 4 can rotate relative to the second outer ring 5 as it rotates with the rotating shaft 21. This avoids problems such as loosening of the connection and air leakage between the exhaust pipe 51 and the exhaust duct due to relative rotation. The airflow and powder in the exhaust duct pass through the exhaust pipe 51, which is connected to the exhaust duct, and are discharged outside the device through the side wall of the grinding shell 1. The exhaust pipe 51 provides a stable channel for powder discharge, ensuring smooth airflow and powder discharge, and preventing powder accumulation and blockage in the exhaust duct due to obstructed discharge, which would affect the device's operating efficiency. This design solves the technical problems of unstable powder discharge channels, easy leakage, and easy blockage in existing devices. The rotational cooperation between the second outer ring 5 and the first outer ring 4 ensures the sealing and stability of the connection between the exhaust pipe 51 and the exhaust duct. The horizontal setting of the exhaust pipe 51 further improves the powder discharge efficiency, ensuring continuous and stable operation of the device.

[0061] Reference Figure 5and Figure 6 The bottom of the grinding shell 1 is equipped with a liquid cooling pipe 13.

[0062] During the grinding process of traditional Chinese medicine raw materials, the mechanical force generated by the grinding unit 2 can raise the temperature of the raw materials and powder, easily leading to the destruction of medicinal efficacy. The liquid cooling pipe 13 built into the bottom of the grinding shell 1 can continuously cool the bottom of the grinding shell 1, thereby cooling the raw materials, powder, and grinding structure in the grinding area through heat conduction. This, combined with the airflow cooling formed by the air inlet and outlet channels, forms a dual cooling effect, further reducing the temperature during the grinding process and effectively preventing the medicinal efficacy of traditional Chinese medicine from being lost due to excessive temperature. This setting solves the technical problem of existing devices having limited cooling effect through airflow alone, and the temperature still easily becoming too high during the grinding process, damaging the medicinal efficacy. The built-in design of the liquid cooling pipe 13 does not occupy the space of the grinding area, does not affect the material flow and grinding process, and the dual cooling method greatly improves the cooling effect, ensuring that the raw materials of traditional Chinese medicine are always at a suitable temperature during the grinding process, maximizing the preservation of medicinal efficacy and improving the quality of the powder.

[0063] Reference Figures 1 to 8 A device for preparing powdered raw materials of traditional Chinese medicine includes a powdered raw material preparation device, a sealed feeding device, and a collection unit.

[0064] The sealed feeding device is connected to the feed inlet 11 of the grinding shell 1. During feeding, the sealed feeding device disconnects the inside of the grinding shell 1 from the outside, so the powder inside the grinding shell 1 will not be discharged from the feed inlet 11. The powder prepared by the herbal raw material powder preparation device is transported to the collection unit for collection through the exhaust pipe 51. Since the sealed feeding device and the collection unit are existing technologies, they will not be described in detail here.

[0065] Working principle: During use, the herbal raw materials are fed into the feed inlet 11 of the grinding shell 1. The herbal raw materials fall to the bottom of the grinding shell 1 through the feed channel. Since the bottom of the grinding shell 1 has a funnel-shaped structure, and the extension direction of the feed channel is on the outer circle of the funnel-shaped structure, the herbal raw materials that just fall to the bottom of the grinding shell 1 are at the highest point of the funnel-shaped structure. Under the guidance of the funnel-shaped structure, the herbal raw materials move towards the center of the funnel-shaped structure, avoiding the situation where the herbal raw materials cannot move after being put in and thus cannot be ground. Under the guidance of the funnel-shaped structure, the herbal raw materials will pass through the grinding area formed by the rotation of the pressure roller 23. The pressure roller 23 rolls and grinds the herbal raw materials that have passed through the grinding area. The herbal raw materials are turned into powder under the repeated rolling of the pressure roller 23. At the same time, the scraper 24 set on one side of the pressure roller 23 can scrape off the powder that sticks to the bottom of the grinding shell 1 after rolling and some of the unground herbal raw materials, ensuring that the subsequent airflow can blow the ground powder away and avoid the accumulation of powder at the bottom of the grinding shell 1. During the grinding process, the first and second fans start simultaneously. The first fan draws filtered air from the outside into the grinding area through the air inlet channel, while the second fan exhausts air from the grinding area through the air outlet channel. Since both the air inlet and outlet channels are annular, with the air inlet channel located on the inner ring of the air outlet channel, an airflow is formed in the grinding area after the first and second fans start, moving from the inner ring to the outer ring. Under the action of the airflow, the powder is blown up and carried to the air outlet channel, and finally discharged through the exhaust pipe 51. The airflow in the grinding area not only cools the herbal raw materials and powder during grinding but also carries the ground powder away in time, preventing it from accumulating at the bottom of the grinding shell 1. In addition, a liquid cooling pipe 13 is built into the bottom of the grinding shell 1, further cooling the bottom of the grinding shell 1 and preventing the herbal raw materials from losing their efficacy due to excessive temperature during grinding.

[0066] As a supplement, a second filter 31 is installed in the air inlet channel, and a first filter 41 is installed in the air outlet channel. The airflow direction in the air inlet and air outlet channels of the powder preparation device is not always consistent; the overall airflow direction can be changed as needed. To change the overall airflow direction, it is only necessary to make the first fan and the second fan rotate synchronously in opposite directions. During the grinding process, the airflow enters the exhaust channel from the air inlet channel through the grinding area. The first filter 41 installed in the exhaust channel can intercept some of the herbal raw materials mixed in the airflow, and only the powder can pass through the first filter 41 and be discharged through the exhaust pipe 51. After one grinding cycle, some herbal raw materials adhere to the upper part of the first filter screen 41, and some powder also clogs the mesh of the first filter screen 41, reducing its air passage performance. At this time, the first and second fans rotate synchronously in opposite directions, allowing air to enter the air inlet channel from the exhaust channel through the grinding area. This blows away the herbal raw materials attached to the lower part of the first filter screen 41 and the powder that clogs the first filter screen 41. To prevent the blown-away herbal raw materials and powder from entering the ventilation groove 211 of the rotating shaft 21 through the air inlet channel and causing blockage of the ventilation groove 211, a second filter screen 31 is installed in the air inlet channel. Since the synchronous counter-rotation time of the first and second fans is short and the amount of herbal raw materials and powder blown away from the lower part of the first filter screen 41 is small, the second filter screen 31 will not be clogged again, thus achieving the self-cleaning function of the first filter screen 41. During the self-cleaning process of the first filter screen 41, the grinding unit 2 is in continuous operation. Since the second filter screen 31 can intercept the powder, only air can pass through the second filter screen 31 and be discharged. The blown-away powder and Chinese herbal raw materials will fall back to the bottom of the grinding shell 1 and be ground a second time. The Chinese herbal raw materials that are not ground into powder will be turned into powder after the second grinding. Then the first fan and the second fan will return to their original air supply direction, so that the filtered air from the outside will enter the exhaust channel from the air inlet channel through the grinding area, thereby carrying away all the powder remaining at the bottom of the grinding shell 1.

[0067] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A device for preparing powdered Chinese herbal medicine raw materials, comprising a grinding shell (1) with a feed inlet (11) on its side wall and a grinding unit (2). Its features are, The bottom of the grinding shell (1) has a funnel-shaped structure, and the grinding unit (2) contacts the bottom of the grinding shell (1) to form a grinding area. The grinding area has a ring-shaped structure. The powder preparation device also includes: The inner ring sleeve (3) is fixedly sleeved on the periphery of the grinding unit (2). The inner wall of the inner ring sleeve (3) and the outer side of the grinding unit (2) form an air inlet channel. The outer side of the air inlet channel is connected to a first fan that can discharge filtered air from the outside into the air inlet channel. The first outer ring sleeve (4) is fixedly sleeved around the outer periphery of the inner ring sleeve (3). The inner side of the first outer ring sleeve (4) and the outer side of the inner ring sleeve (3) form an exhaust channel. The outer side of the exhaust channel is connected to a second fan that draws out the air in the exhaust channel. The operating power of the first fan and the second fan is always the same. The outer side of the first outer ring sleeve (4) and the inner wall of the grinding shell (1) have a feeding channel that communicates with the feed inlet (11).

2. The apparatus for preparing powdered traditional Chinese medicine raw materials according to claim 1, characterized in that, A first filter screen (41) is horizontally arranged in the exhaust channel. The first filter screen (41) has a ring structure and completely covers the horizontal cross section of the exhaust channel. The first filter screen (41) can intercept Chinese herbal raw materials that have not been turned into powder.

3. The apparatus for preparing powdered traditional Chinese medicine raw materials according to claim 1, characterized in that, The grinding unit (2) includes: A rotating shaft (21) is rotatably disposed in the grinding shell (1) along the axis of the grinding shell (1); A ventilation slot (211) is vertically formed in the rotating shaft (21) and communicates with the air inlet channel; A drive unit (22) is disposed on one side of the rotating shaft (21) and is used to drive the rotating shaft (21) to rotate.

4. The apparatus for preparing powdered traditional Chinese medicine raw materials according to claim 1, characterized in that, A second filter (31) is horizontally arranged in the air inlet channel. The second filter (31) completely covers the horizontal cross section of the air inlet channel and can intercept powder.

5. The apparatus for preparing powdered traditional Chinese medicine raw materials according to claim 3, characterized in that, The outer side of the rotating shaft (21) is provided with a pressure roller (23) that rotates synchronously with the rotating shaft (21), and the grinding area is formed by the rolling cooperation between the pressure roller (23) and the bottom of the grinding shell (1).

6. The apparatus for preparing powdered traditional Chinese medicine raw materials according to claim 5, characterized in that, A scraper (24) is provided on one side of the pressure roller (23) and rotates synchronously with the rotating shaft (21). The scraper (24) slides with the bottom of the grinding shell (1) to form a scraping area, which coincides with the grinding area.

7. The apparatus for preparing powdered traditional Chinese medicine raw materials according to claim 3, characterized in that, The bottom of the grinding shell (1) is vertically provided with an upwardly extending extension sleeve (12), and the lower end of the rotating shaft (21) extends into the extension sleeve (12).

8. The apparatus for preparing powdered traditional Chinese medicine raw materials according to claim 1, characterized in that, The outer side of the upper part of the first outer ring sleeve (4) is rotatably fitted with a second outer ring sleeve (5). The second outer ring sleeve (5) is fixedly connected to the grinding shell (1). An exhaust pipe (51) is horizontally arranged on the side wall of the second outer ring sleeve (5) and passes through the side wall of the grinding shell (1). The exhaust pipe (51) is connected to the exhaust channel.

9. The apparatus for preparing powdered traditional Chinese medicine raw materials according to claim 1, characterized in that, The bottom of the grinding shell (1) is equipped with a liquid cooling pipe (13). A device for preparing powdered raw materials of traditional Chinese medicine includes a powder preparation apparatus, a sealed feeding device, and a collection unit.

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