A kind of ointment stirring equipment for traditional Chinese medicine plaster

Abstract

This invention discloses a medicated plaster mixing device for traditional Chinese medicine plasters, relating to the technical field of traditional Chinese medicine preparation equipment. It includes a mixing vessel, a drive assembly, and a multi-stage mixing assembly. The mixing vessel has a removable sealing cap at the top, an inlet on the side wall, an outlet valve at the bottom, and an internal mounting plate. The drive assembly includes a drive motor and a first rotating shaft driven by it. The multi-stage mixing assembly includes a first mixing component fixed to the center of the first rotating shaft, and second, third, and fourth mixing components connected to the first rotating shaft via three independent transmission assemblies and circumferentially distributed on the mounting plate. Each transmission assembly uses pulleys with different diameter ratios, allowing the three driven mixing components to achieve different rotational speeds. This achieves efficient, uniform, and dead-angle-free mixing of high-viscosity traditional Chinese medicine plasters, while facilitating cleaning and discharging, and integrating a vacuum function to eliminate air bubbles.

Description

Technical Field

[0001] This invention relates to the field of traditional Chinese medicine preparation equipment technology, specifically to a paste mixing device for traditional Chinese medicine plasters. Background Technology

[0002] Traditional Chinese medicine plasters require the herbs to be evenly mixed with a viscous matrix. The mixing process directly affects the quality of the plaster and the stability of its efficacy. Currently used single-shaft mixing equipment is prone to creating mixing dead zones when dealing with highly viscous and easily separated traditional Chinese medicine plasters, resulting in poor mixing effects.

[0003] Existing improvement solutions, such as multi-axis or planetary mixing equipment, have improved mixing capacity to some extent, but they are often complex in structure and it is difficult to achieve differentiated speed and shear force matching according to the rheological characteristics of Chinese medicine pastes. The mixing uniformity is still limited, and the energy efficiency and maintenance costs are high.

[0004] In addition, air bubbles are easily mixed into the paste during the stirring process, resulting in poor adhesion of the finished ointment. Furthermore, viscous materials tend to adhere to the inner wall of the equipment, leading to residue at the discharge and difficulty in cleaning. Summary of the Invention

[0005] To address the technical deficiencies in the background art, this invention proposes a medicated paste mixing device for traditional Chinese medicine plasters, which solves the aforementioned technical problems and meets practical needs. The specific technical solution is as follows: A medicinal paste mixing device for traditional Chinese medicine plasters, comprising: A mixing vessel, which is barrel-shaped, has a removable sealing cap fixed to the upper end of the mixing vessel by screws, a feed inlet provided at the upper end of the side wall of the mixing vessel, a discharge valve provided at the bottom of the mixing vessel, and an installation plate provided at the upper end of the interior of the mixing vessel. A drive assembly, comprising a drive motor and a first rotating shaft, wherein the drive motor is fixed in the middle of the upper end of the sealing cover, the output end of the drive motor is vertically downward and extends into the interior of the stirring vessel, and the output end of the drive motor is fixedly connected to the first rotating shaft; A multi-stage stirring assembly includes a first stirring assembly, a second stirring assembly, a third stirring assembly, and a fourth stirring assembly. The first stirring assembly is fixed in the lower middle region of a first rotating shaft. The second, third, and fourth stirring assemblies are evenly distributed circumferentially around the center of a mounting plate, and each distance from the center of the mounting plate is half the radius of the mounting plate. The angle formed between any two adjacent stirring assemblies and the center of the mounting plate is 120°. The second stirring assembly is driven by a first transmission assembly and is driven by a second rotating shaft and the first transmission assembly. The third stirring assembly is driven by a second transmission assembly and is driven by a third rotating shaft and the second transmission assembly. The fourth stirring assembly is driven by a third transmission assembly and is driven by a third rotating shaft and the third transmission assembly.

[0006] As a further technical solution of the present invention, the first transmission component includes a first driving wheel, a first driven wheel and a first synchronous belt. The diameter of the first driving wheel is larger than the diameter of the first driven wheel. The first driving wheel is fixed at the upper end of the first rotating shaft. The first driven wheel is rotatably fixed on the upper surface of the mounting plate at a position corresponding to the second stirring component. The first driving wheel and the first driven wheel are connected by the first synchronous belt.

[0007] As a further technical solution of the present invention, the second transmission component includes a second driving wheel, a second driven wheel, and a second synchronous belt. The diameter of the second driving wheel is larger than the diameter of the second driven wheel, and the diameter ratio of the second driving wheel to the second driven wheel is greater than the diameter ratio of the first driving wheel to the first driven wheel. The second driving wheel is fixed at the upper end of the first rotating shaft, and the second driven wheel is rotatably fixed at the upper surface of the mounting plate above the third stirring component. The second driving wheel and the second driven wheel are connected by a second synchronous belt.

[0008] As a further technical solution of the present invention, the third transmission assembly includes a third driving wheel, a third driven wheel, and a third synchronous belt. The diameter of the third driving wheel is larger than the diameter of the third driven wheel. The diameter ratio of the third driving wheel to the third driven wheel is smaller than the diameter ratio of the second driving wheel to the second driven wheel. The diameter ratio of the third driving wheel to the third driven wheel is larger than the diameter ratio of the first driving wheel to the first driven wheel. The third driving wheel is fixed at the upper end of the first rotating shaft. The third driven wheel is rotatably fixed on the upper surface of the mounting plate at a position corresponding to the fourth stirring assembly. The third driving wheel and the third driven wheel are connected by a third synchronous belt.

[0009] As a further technical solution of the present invention, the first stirring assembly includes a plurality of first stirring rods, the distance between the end of the first stirring rod and the inner wall of the stirring vessel is less than 5 mm, and the plurality of first stirring rods are uniformly fixed in the lower middle region of the first rotating shaft.

[0010] As a further technical solution of the present invention, the second stirring assembly includes a plurality of second stirring rods, the third stirring assembly includes a plurality of third stirring rods, and the fourth stirring assembly includes a plurality of fourth stirring rods. The distance between the second stirring rod, the third stirring rod, and the fourth stirring rod and the inner wall of the stirring vessel is less than 5 mm. The second stirring rod, the third stirring rod, and the fourth stirring rod are arranged crosswise in the vertical direction.

[0011] As a further technical solution of the present invention, a plurality of scraping rods are fixed in the middle of the first rotating shaft, and scraping plates are fixed at the ends of the scraping rods. The upper end of the scraping plate slides in contact with the lower end face of the mounting plate. The horizontal height of the lower end of the scraping plate is consistent with the horizontal height of the lower end of the first stirring assembly. There is a gap between the inner side of the scraping plate and the multi-stage stirring assembly.

[0012] As a further technical solution of the present invention, the feed inlet is located in the area of ​​the side wall of the mixing vessel below the mounting plate.

[0013] As a further technical solution of the present invention, the lower end of the mixing vessel is detachably connected to a discharge hopper, the bottom end of the first rotating shaft is fixed with a bottom scraper that slides in cooperation with the inner surface of the discharge hopper, and the bottom of the discharge hopper is fixedly connected to a discharge valve.

[0014] As a further technical solution of the present invention, the upper end of the sealing cover is provided with an air extraction hole for connecting an external vacuuming device, and the mounting plate is provided with a plurality of connecting holes for airflow.

[0015] The beneficial effects of this invention are as follows: By using stirring components with different rotation speeds and levels to form a complex flow field in the stirring vessel, clumps or clusters of plaster can be broken up, ensuring uniform mixing of the medicine, avoiding dead zones in the stirring, and making the medicinal components of the plaster uniform and consistent, thus ensuring its reliable efficacy; the stirring rod is set close to the inner wall of the stirring vessel, and together with the stirring rod and the scraper, it can continuously remove viscous medicine adhering to the inner wall of the vessel, reducing the residue of medicine in the vessel, avoiding the imbalance of medicine ratio caused by long-term drug residue, and also improving the utilization rate of precious Chinese medicinal materials and reducing the cleaning frequency of the device; with the help of the vacuum equipment, air bubbles in the plaster can be removed, preventing the finished plaster from having voids or poor adhesion due to air bubbles during application, improving the application effect of the plaster, and also preventing the oxidation of certain special drugs. Attached Figure Description

[0016] Figure 1This is a perspective view of an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal components of the stirring tank according to an embodiment of the present invention; Figure 3 This is a schematic diagram of an embodiment of the present invention; Figure 4 This is a top view of an embodiment of the present invention; Figure 5 This is a top view of the transmission assembly according to an embodiment of the present invention; Figure 6 This is a bottom view of the stirring assembly according to an embodiment of the present invention.

[0017] Wherein: 1-Agitator; 11-Sealing cover; 12-Inlet; 13-Outlet valve; 14-Mounting plate; 15-Outlet hopper; 16-Ejector hole; 17-Connecting hole; 2-Drive assembly; 21-Drive motor; 22-First rotating shaft; 3-Multi-stage agitator assembly; 31-First agitator assembly; 311-First agitator rod; 32-Second agitator assembly; 321-Second agitator rod; 322-Second rotating shaft; 33-Third agitator assembly; 331-Third agitator rod; 332-Third rotating shaft; 34-The... 4. Stirring assembly; 341-Fourth stirring rod; 342-Fourth rotating shaft; 35-Wall scraper; 351-Wall scraper; 36-Bottom scraper; 4-Transmission assembly; 41-First transmission assembly; 411-First driving wheel; 412-First driven wheel; 413-First synchronous belt; 42-Second transmission assembly; 421-Second driving wheel; 422-Second driven wheel; 423-Second synchronous belt; 43-Third transmission assembly; 431-Third driving wheel; 432-Third driven wheel; 433-Third synchronous belt. Detailed Implementation

[0018] The embodiments of the present invention will be described below with reference to the accompanying drawings and related examples. The embodiments of the present invention are not limited to the following examples, and the present invention relates to the relevant necessary components in this technical field, which should be regarded as well-known technology in this technical field and can be known and mastered by those skilled in this technical field.

[0019] This embodiment provides a paste mixing device for traditional Chinese medicine plasters, such as... Figures 1 to 6As shown, the system includes a mixing vessel 1, a drive assembly 2, and a multi-stage mixing assembly 3. The mixing vessel 1 is a vertical cylindrical barrel structure. A removable sealing cover 11, which can be fully opened and sealed, is fixed to the top of the mixing vessel 1 by screws. The sealing cover 11 can be directly removed when cleaning and maintenance are required. An inlet 12 for adding solid or liquid raw materials is provided at the upper end of the side wall of the mixing vessel 1. The inlet 12 is typically funnel-shaped with its upper end facing outwards to facilitate the addition of raw materials. A discharge valve 13 is located at the center of the bottom of the mixing vessel 1 for discharging the mixed high-viscosity ointment. During operation, the discharge valve 13 can be manually opened and closed to control the start and stop of drug discharge. A circular mounting plate 14 is fixedly installed at the upper part of the interior of the mixing vessel 1, dividing the interior space into an upper drive zone and a lower mixing zone.

[0020] like Figures 1 to 6 As shown, the drive assembly 2, serving as the core power source, includes a drive motor 21 and a first rotating shaft 22. The drive motor 21 is fixedly mounted on the middle of the upper end of the sealing cover 11 via a bracket. The output shaft of the drive motor 21 extends vertically downward through the sealing cover 11 and into the interior of the stirring vessel 1. The upper end of the first rotating shaft 22 is fixedly connected to the output end of the drive motor 21 via a coupling, thereby transmitting the rotational power of the motor to the vessel.

[0021] like Figures 1 to 6As shown, the multi-stage stirring assembly 3 is the core of this invention, including a first stirring assembly 31, a second stirring assembly 32, a third stirring assembly 33, and a fourth stirring assembly 34. The first stirring assembly 31 is directly and fixedly installed in the lower middle region of the first rotating shaft 22, and can rotate synchronously with the first rotating shaft 22. The second stirring assembly 32, the third stirring assembly 33, and the fourth stirring assembly 34 are rotatably fixed to the mounting plate 14 via the second rotating shaft 322, the third rotating shaft 332, and the fourth rotating shaft 342, respectively. The second stirring assembly 32, the third stirring assembly 33, and the fourth stirring assembly 34 are evenly distributed circumferentially around the center of the mounting plate 14. The distance between the second stirring assembly 32, the third stirring assembly 33, and the fourth stirring assembly 34 and the center of the mounting plate 14 is half the radius of the mounting plate 14, and the angle formed by two adjacent stirring assemblies and the center of the mounting plate 14 is 120°, forming a triangular distribution. The second stirring component 32 is driven by the first transmission component 41 and the first rotating shaft 22. The third stirring component 33 is driven by the second transmission component 42 and the first rotating shaft 22. The fourth stirring component 34 is driven by the third transmission component 43 and the first rotating shaft 22. Through the cooperation of the three transmission components 4, a single drive motor 21 can simultaneously drive the four stirring components distributed in the center and circumference to rotate, forming a complex stirring flow field to fully and uniformly mix and stir the raw materials put into the stirring vessel 1. This multi-axis, differential speed stirring mode is particularly suitable for mixing traditional Chinese medicine plasters containing various solid medicinal powders, fibrous medicinal materials, and viscous matrices. It can generate strong radial and axial shear forces, effectively breaking up powder clumps, dispersing fibers, and uniformly suspending components with different specific gravities in the matrix. This fundamentally avoids the problems of layering, clumping, and stirring dead zones that are prone to occur in traditional single-axis stirring, ensuring that the drug content of each plaster is uniform and the efficacy is stable and reliable.

[0022] like Figures 1 to 6 As shown, the first transmission assembly 41 is used to drive the second stirring assembly 32. The first transmission assembly 41 includes a first driving wheel 411 fixedly sleeved on the upper end of the first rotating shaft 22, a first driven wheel 412 mounted on the mounting plate 14 and connected to the upper end of the second rotating shaft 322 of the second stirring assembly 32, and a first synchronous belt 413 tensioned between the first driving wheel 411 and the first driven wheel 412. To achieve a specific speed relationship, the diameter of the first driving wheel 411 is set to be larger than the diameter of the first driven wheel 412. When the first rotating shaft 22 rotates under the drive of the drive motor 21, the second rotating shaft 322 will rotate in the same direction at a higher speed than the first rotating shaft 22 through the transmission of the first driving wheel 411, the first synchronous belt 413, and the first driven wheel 412, thereby driving the second stirring assembly 32 to stir at high speed. The first driven wheel 412 is rotatably fixed to a corresponding position on the mounting plate 14 by bearings or other structures.

[0023] like Figures 1 to 6 As shown, the second transmission assembly 42 is used to drive the third stirring assembly 33. The second transmission assembly 42 includes a second driving wheel 421, a second driven wheel 422, and a second synchronous belt 423. The second driving wheel 421 is fixed to the upper end of the first rotating shaft 22, located below or above the first driving wheel 411 (they need to be staggered). The second driven wheel 422 is connected to the upper end of the third rotating shaft 332 in the third stirring assembly 33, and the second driven wheel 422 is mounted on the mounting plate 14 at a position corresponding to the third stirring assembly 33. Similarly, the diameter of the second driving wheel 421 is larger than the diameter of the second driven wheel 422. Crucially, the diameter ratio of the second driving wheel 421 to the second driven wheel 422 is intentionally set to be greater than the diameter ratio of the first driving wheel 411 to the first driven wheel 412. This means that after transmission through the second transmission assembly 42, the rotational speed of the third rotating shaft 332 will be different from the rotational speed of the second rotating shaft 322, greatly enhancing the radial and axial shearing and convection mixing effect of the material.

[0024] like Figures 1 to 6 As shown, the third transmission assembly 43 is used to drive the fourth stirring assembly 34. The third transmission assembly 43 includes a third driving wheel 431, a third driven wheel 432, and a third synchronous belt 433. The third driving wheel 431 is fixed to the upper end of the first rotating shaft 22 (arranged in layers with the first and second driving wheels). The third driven wheel 432 is connected to the fourth rotating shaft 342 and mounted on the mounting plate 14. The diameter of the third driving wheel 431 is larger than the diameter of the third driven wheel 432. The diameter ratio of the third driving wheel 431 to the third driven wheel 432 is set to be less than the diameter ratio of the second driving wheel 421 to the second driven wheel 422, and greater than the diameter ratio of the first driving wheel 411 to the first driven wheel 412. Therefore, the fourth rotating shaft 342 will obtain a rotational speed greater than that of the first rotating shaft 22 and the second rotating shaft 322, and a rotational speed less than that of the third rotating shaft 332. By carefully designing the diameter ratio of these three transmission components, the central first stirring component 31 rotates at a base speed, while the three circumferentially distributed stirring components rotate at three different speeds, all higher than the central speed. This creates an asymmetrical, powerful stirring environment with a speed gradient between the center and the periphery, which is particularly suitable for breaking up any clumps that may exist in traditional Chinese medicine ointments and ensuring the uniform dispersion of each component. This stepped speed configuration simulates the "fast at first, then slow, with varying force" process used in hand-mixing ointments. It allows various viscous matrices and medicinal powders to be fully impregnated and blended during mechanical stirring, forming an ointment with a uniform texture and suitable adhesion, meeting the requirements of plasters for extensibility and adhesion.

[0025] like Figures 1 to 6As shown, the first stirring assembly 31 includes several (e.g., four to six) first stirring rods 311 welded radially or inclinedly, or fixed by connectors to the lower part of the middle of the first rotating shaft 22. The length of the first stirring rods 311 is precisely calculated so that the distance between their ends and the inner wall of the mixing vessel 1 is less than 5 mm. This extremely small gap allows the first stirring rods 311 to scrape and stir the high-viscosity ointment near the vessel wall to the maximum extent when rotating, preventing the material from cooling, solidifying, and depositing on the cooler vessel wall, and ensuring that the material in the inner edge area of ​​the mixing vessel 1 can also be fully incorporated into the stirring core area for mixing. For traditional Chinese medicine ointments containing easily cooled and solidified components such as beeswax and gums, this design can continuously scrape off the condensed layer on the inner wall, ensuring uniform temperature inside the vessel, preventing the active ingredients from precipitating or unevenly distributing due to localized cooling, ensuring the overall composition and density of the ointment are consistent, and guaranteeing the efficacy of the ointment.

[0026] like Figures 1 to 6 As shown, the second stirring assembly 32 includes several second stirring rods 321 fixed on the second rotating shaft 322, the third stirring assembly 33 includes several third stirring rods 331 fixed on the third rotating shaft 332, and the fourth stirring assembly 34 includes several fourth stirring rods 341 fixed on the fourth rotating shaft 342. The lengths of these stirring rods are also designed so that the distance between their ends and the inner wall of the stirring vessel 1 is less than 5mm. This allows the three circumferential stirring assemblies to effectively clean and stir the arc-shaped vessel wall area corresponding to their respective motion trajectories when rotating. Simultaneously, due to the combined effect of the placement positions and stirring rod lengths of the second, third, and fourth stirring assemblies 32, 33, and 34, the drugs within the working areas of the three stirring assemblies inside the entire stirring vessel 1 can be thoroughly and uniformly mixed. Furthermore, the vertical installation heights of the second, third, and fourth stirring rods 321, 331, and 341 are staggered; they are not located on the same horizontal plane but are arranged in upper and lower layers. This three-dimensional cross-layout can generate strong axial material flow, avoiding the formation of "layering" or "stagnant zones" of materials at a certain horizontal level, and promoting the continuous lifting, pressing and exchanging of the ointment in the upper, middle and lower layers of the vessel, thereby achieving faster axial uniform mixing.

[0027] During the production of traditional Chinese medicine ointments, the different densities of the various components (e.g., mineral drugs have a high density, while herbal drugs have a low density) can easily lead to stratification during stirring. The three-dimensional cross-layout of the layered differential speed setting of the second stirring component 32, the third stirring component 33, and the fourth stirring component 34 can break the vertical density gradient generated during the stirring process of the traditional Chinese medicine ointment, ensuring that the different components in the ointment can be evenly distributed. It can also ensure the uniform density of the ointment inside the vessel, avoiding the situation of thinner top and thicker bottom when applied, which would affect the efficacy of the ointment.

[0028] Furthermore, the diameter ratio of the first driving wheel 411 to the first driven wheel 412 is set to 1.2:1, the diameter ratio of the second driving wheel 421 to the second driven wheel 422 is set to 2:1, and the diameter ratio of the third driving wheel 431 to the third driven wheel 432 is set to 1.5:1. At this point, the rotational speed of the second rotating shaft 322 is 1.2 times that of the first rotating shaft 22, the rotational speed of the third rotating shaft 332 is 2 times that of the first rotating shaft 22, and the rotational speed of the fourth rotating shaft 342 is 1.5 times that of the first rotating shaft 22. During installation, transmission components with different diameter ratios can be replaced according to the viscosity of the drug being stirred, so that the stirring effect for that drug is optimized. The second stirring component 32, the third stirring component 33, and the fourth stirring component 34 are arranged vertically from top to bottom, with one second stirring rod 321 located above one of the third stirring rods 331, and the third stirring rod 331 located above one of the fourth stirring rods 341, and this arrangement is repeated thereafter. Assuming the rotational speed of the first rotating shaft 22 is N, the arrangement of the above-mentioned stirring components, combined with the different rotational speeds of the different rotating shafts, ensures that when the drug flows out from top to bottom, it first passes through the second stirring rod 321 at a speed of 1.2 N, accelerating the flow and initial fusion of the drug. Then, it passes through the third stirring rod 331 at a high speed of 2 N, breaking up any remaining lumps in the drug and fully fusing it. Next, it passes through the fourth stirring rod 341 at a speed of 1.5 N, slowing down the flow of the drug and fusing any incompletely fused fragments. Finally, it flows into the stirring area of ​​the first stirring component 31, where the first stirring rod 311 stirs it at a speed of N, continuously fusing the drug and preventing it from hardening. The finally fully and uniformly fused drug is discharged from the stirring vessel 1 via the discharge valve 13. This tiered, differential speed stirring setting ensures more thorough and uniform mixing of the drug. Simultaneously, the multi-directional shear force and convection caused by the different rotational speeds prevent the formation of dead zones in the drug's mixing due to the same-direction, same-speed rotation of the stirring equipment. This design follows the "dispersion followed by homogenization" process of traditional Chinese medicine plasters. First, a high-speed rotating stirring component breaks down and disperses larger particles or clumps in the plaster. Then, the plaster enters a first stirring component 31 at a low speed for uniform mixing. The plaster is then initially homogenized by a second stirring component 32, followed by high-speed breaking down of larger particles or clumps by a third stirring component 33. A fourth stirring component 34 then homogenizes and degasses the plaster again, repeating the above process. Finally, the first stirring component 31 slows down and stirs the plaster, ensuring its density while preventing solidification. This process thoroughly breaks down and mixes the plaster, resulting in a finer, more uniformly mixed plaster to guarantee efficacy and a more comfortable feel when applied.

[0029] Traditional Chinese medicine pastes are highly viscous, easily forming a layer on the inner wall of the mixing vessel that is difficult to participate in the main circulation. This not only wastes valuable medicinal materials but also, with long-term residue, can ferment and deteriorate, affecting the quality of subsequent batches. To further optimize the mixing effect and prevent material accumulation in specific areas, such as... Figures 1 to 6 As shown, several scraping rods 35 (two symmetrically arranged in this embodiment) are radially fixedly connected at the middle of the first rotating shaft 22, below the mounting plate 14. Each scraping rod 35 has a scraping plate 351 fixedly connected to its end. The upper edge of the scraping plate 351 is machined into an arc or plane that matches the shape of the lower surface of the mounting plate 14, maintaining sliding contact or a very small clearance fit with it. The horizontal height of the lower edge of the scraping plate 351 is approximately the same as or slightly lower than the horizontal height of the lowest stirring rod of the first stirring assembly 31. The upper end of the scraping plate 351 maintains sliding contact or a very small clearance fit with the lower end face of the mounting plate 14, enabling it to scrape the inner wall of the stirring area within the mixing vessel 1. A certain safety gap is maintained between the inner side of the scraping plate 351 (i.e., the side closest to the rotating shaft) and the stirring rod of the multi-stage stirring assembly 3 to prevent interference. When the first rotating shaft 22 rotates, the scraper 351 rotates accordingly. Its upper part continuously scrapes the lower surface of the mounting plate 14, preventing the viscous ointment from accumulating at the bottom of the mounting plate 14 and forming a difficult-to-mix "dead corner." At the same time, the overall structure of the scraper 351 is like a vertical paddle, which helps to push the material in the area below the mounting plate 14 towards the middle and lower part of the vessel, enhancing the flow in that area. The design of the scraper 351 completely eliminates this hidden danger, ensuring that all input materials can participate in effective mixing, improving the utilization rate of medicinal materials, and greatly reducing the cleaning burden.

[0030] The components of traditional Chinese medicine ointments are complex and diverse, existing in various forms such as fluids, powders, and solid particles. To ensure that raw materials of different forms can be smoothly added to the mixing vessel 1 and mixed, this embodiment restricts the feed inlet 12. For example... Figures 1 to 6 As shown, the feed inlet 12 is specifically located on the side wall of the mixing vessel 1, below the mounting plate 14. This means that all added materials will directly enter the main mixing zone below, separated by the mounting plate 14. This design has two advantages: first, the materials can fall directly into the area that needs the most vigorous mixing, and be captured and dispersed by the high-speed rotating multi-stage mixing components 3 in the first instance, ensuring that all components can be mixed immediately; second, it can prevent powdery or lightweight materials from flying into the transmission zone above during feeding, contaminating the first drive wheel 411, synchronous belt, and other transmission components, ensuring the reliability and cleanliness of the equipment operation. To make feeding more convenient, an upward-opening funnel can be added to the upper part of the feed inlet 12, which can realize feeding more quickly and reduce the spillage of drugs.

[0031] For topical plasters containing precious Chinese medicinal herbs, reducing residue means significant cost savings. For example... Figures 1 to 6 As shown, to ensure the thorough and smooth discharge of high-viscosity ointment, a conical discharge hopper 15 is detachably connected to the lower end of the mixing vessel 1 via a flange or quick clamp. The upper opening of the discharge hopper 15 aligns with the bottom opening of the mixing vessel 1, while the lower opening connects to the discharge valve 13. A bottom scraper 36 is fixedly installed at the bottom end of the first rotating shaft 22. The shape of the bottom scraper 36 is adapted to the inner conical surface of the discharge hopper 15, maintaining a sliding fit or a small gap with it. When the equipment is running and discharging, as the first rotating shaft 22 rotates, the bottom scraper 36 rotates close to the inner wall of the discharge hopper 15, continuously scraping off the viscous ointment adhering to the hopper wall and guiding it to the central discharge valve 13. This design effectively solves the problem of high-viscosity materials easily remaining on the hopper wall during discharge, causing waste and making cleaning difficult, achieving almost complete unloading. The bottom scraper 36 ensures that most of the paste can be discharged, which is both economical and hygienic, while the conical discharge hopper 15 facilitates the accumulation and outflow of paste, making it convenient for filling or coating.

[0032] For certain traditional Chinese medicine pastes that are easily oxidized or sensitive to moisture, this equipment also integrates a vacuum stirring function. For example... Figures 1 to 6 As shown, an air extraction hole 16 is provided at the upper end of the sealing cover 11. The air extraction hole 16 is connected to an external vacuum pump or other vacuuming equipment via a pipeline. Meanwhile, the mounting plate 14 separating the transmission zone and the mixing zone is not completely sealed, but has several evenly spaced connecting holes 17. When needed, all inlet and outlet ports are closed, and the vacuum equipment is activated. The entire main mixing zone below can be evacuated to the required vacuum level through the air extraction hole 16 and the connecting holes 17 on the mounting plate 14. This effectively removes air trapped during the ointment mixing process, preventing oxidation, deterioration, and bubble formation. The negative pressure also promotes the penetration and fusion of different components, improving the density and quality of the ointment. During atmospheric pressure mixing, the connecting holes 17 also ensure pressure balance between the transmission zone and the mixing zone. The vacuum mixing function allows mixing to be completed in a low-oxygen environment, greatly protecting the efficacy of the medicine. Simultaneously, removing air bubbles makes the ointment smoother and adheres more tightly when applied, avoiding problems such as untreated areas or easy detachment due to air bubbles in the ointment, thus improving the product's appearance and effectiveness.

[0033] This embodiment utilizes a single drive motor 21 to drive the center and a three-stage differential speed stirring assembly in a circumferential direction to work together, forming a highly efficient composite flow field. During the process, after the material is fed into the inlet 12, the first stirring assembly 31 stirs at a base speed, while the second, third, and fourth stirring assemblies 32, 33, and 34 rotate at higher and different speeds via a transmission assembly, achieving strong shearing and convection. Simultaneously, all stirring rods maintain a minimal gap between their ends and the vessel wall, and with the assistance of the wall scraper 351 and bottom scraper 36, material adhesion and sedimentation are thoroughly prevented. If necessary, a vacuum stirring port 16 can be connected to remove air bubbles. Ultimately, this achieves efficient and uniform mixing of the ointment and near-complete unloading, making it particularly suitable for the preparation of high-viscosity traditional Chinese medicine ointments.

[0034] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A paste mixing device for traditional Chinese medicine plasters, characterized in that, include: A mixing vessel (1) is barrel-shaped. A removable sealing cap (11) is fixed to the upper end of the mixing vessel (1) by screws. An inlet (12) is provided at the upper end of the side wall of the mixing vessel (1). A discharge valve (13) is provided at the bottom of the mixing vessel (1). An installation plate (14) is provided at the upper end of the interior of the mixing vessel (1). The drive assembly (2) includes a drive motor (21) and a first rotating shaft (22). The drive motor (21) is fixed in the middle of the upper end of the sealing cover (11). The output end of the drive motor (21) is set vertically downward. The output end of the drive motor (21) extends into the inside of the stirring tank (1). The output end of the drive motor (21) is fixedly connected to the first rotating shaft (22). A multi-stage stirring assembly (3) includes a first stirring assembly (31), a second stirring assembly (32), a third stirring assembly (33), and a fourth stirring assembly (34). The first stirring assembly (31) is fixed in the lower middle region of the first rotating shaft (22). The second stirring assembly (32), the third stirring assembly (33), and the fourth stirring assembly (34) are evenly distributed circumferentially around the center of the mounting plate (14), and the distance between them and the center of the mounting plate (14) is half the radius of the mounting plate (14). The angle between any two adjacent stirring assemblies and the center of the mounting plate (14) is 120°. The second stirring assembly (32) passes through the first stirring assembly (31), the second stirring assembly (32), the third stirring assembly (33), and the fourth stirring assembly (34). A transmission assembly (41) is driven to the first rotating shaft (22), the second stirring assembly (32) is driven to the first transmission assembly (41) via the second rotating shaft (322), the third stirring assembly (33) is driven to the first rotating shaft (22) via the second transmission assembly (42), the third stirring assembly (33) is driven to the second transmission assembly (42) via the third rotating shaft (332), the fourth stirring assembly (34) is driven to the first rotating shaft (22) via the third transmission assembly (43), and the fourth stirring assembly (34) is driven to the third transmission assembly (43) via the fourth rotating shaft (342).

2. The ointment mixing device for traditional Chinese medicine plasters according to claim 1, characterized in that, The first transmission assembly (41) includes a first driving wheel (411), a first driven wheel (412) and a first synchronous belt (413). The diameter of the first driving wheel (411) is larger than the diameter of the first driven wheel (412). The first driving wheel (411) is fixed at the upper end of the first rotating shaft (22). The first driven wheel (412) is rotatably fixed at the position corresponding to the second stirring assembly (32) on the upper surface of the mounting plate (14). The first driving wheel (411) and the first driven wheel (412) are connected by the first synchronous belt (413).

3. The ointment mixing device for traditional Chinese medicine plasters according to claim 2, characterized in that, The second transmission assembly (42) includes a second driving wheel (421), a second driven wheel (422), and a second synchronous belt (423). The diameter of the second driving wheel (421) is larger than the diameter of the second driven wheel (422). The ratio of the diameters of the second driving wheel (421) and the second driven wheel (422) is greater than the ratio of the diameters of the first driving wheel (411) and the first driven wheel (412). The second driving wheel (421) is fixed at the upper end of the first rotating shaft (22). The second driven wheel (422) is rotatably fixed at the position above the upper surface of the mounting plate (14) and the third stirring assembly (33). The second driving wheel (421) and the second driven wheel (422) are connected by the second synchronous belt (423).

4. The ointment mixing device for traditional Chinese medicine plasters according to claim 3, characterized in that, The third transmission assembly (43) includes a third driving wheel (431), a third driven wheel (432), and a third synchronous belt (433). The diameter of the third driving wheel (431) is larger than the diameter of the third driven wheel (432). The diameter ratio of the third driving wheel (431) to the third driven wheel (432) is smaller than the diameter ratio of the second driving wheel (421) to the second driven wheel (422). The diameter ratio of the third driving wheel (431) to the third driven wheel (432) is larger than the diameter ratio of the first driving wheel (411) to the first driven wheel (412). The third driving wheel (431) is fixed at the upper end of the first rotating shaft (22). The third driven wheel (432) is rotatably fixed at the position corresponding to the fourth stirring assembly (34) on the upper surface of the mounting plate (14). The third driving wheel (431) and the third driven wheel (432) are connected by the third synchronous belt (433).

5. The ointment mixing device for traditional Chinese medicine plasters according to claim 1, characterized in that, The first stirring assembly (31) includes several first stirring rods (311), the distance between the end of the first stirring rod (311) and the inner wall of the stirring vessel (1) is less than 5mm, and the several first stirring rods (311) are uniformly fixed in the lower middle region of the first rotating shaft (22).

6. The ointment mixing device for traditional Chinese medicine plasters according to claim 1, characterized in that, The second stirring assembly (32) includes several second stirring rods (321), the third stirring assembly (33) includes several third stirring rods (331), and the fourth stirring assembly (34) includes several fourth stirring rods (341). The distance between the second stirring rod (321), the third stirring rod (331), and the fourth stirring rod (341) and the inner wall of the stirring vessel (1) is less than 5 mm. The second stirring rod (321), the third stirring rod (331), and the fourth stirring rod (341) are arranged in a cross direction in the vertical direction.

7. The ointment mixing device for traditional Chinese medicine plasters according to claim 1, characterized in that, A plurality of scraping rods (35) are fixed in the middle of the first rotating shaft (22), and scraping plates (351) are fixed at the ends of the scraping rods (35). The upper end of the scraping plate (351) slides in contact with the lower end face of the mounting plate (14). The horizontal height of the lower end of the scraping plate (351) is consistent with the horizontal height of the lower end of the first stirring assembly (31). There is a gap between the inner side of the scraping plate (351) and the multi-stage stirring assembly (3).

8. The ointment mixing device for traditional Chinese medicine plasters according to claim 1, characterized in that, The feed inlet (12) is located on the side wall of the mixing vessel (1) in the area below the mounting plate (14).

9. The ointment mixing device for traditional Chinese medicine plasters according to claim 1, characterized in that, The lower end of the mixing vessel (1) is detachably connected to a discharge hopper (15), and the bottom end of the first rotating shaft (22) is fixed with a bottom scraper (36) that slides in cooperation with the inner surface of the discharge hopper (15). The bottom of the discharge hopper (15) is fixedly connected to the discharge valve (13).

10. The ointment mixing device for traditional Chinese medicine plasters according to claim 1, characterized in that, The upper end of the sealing cover (11) is provided with an air extraction hole (16) for connecting an external vacuum equipment, and the mounting plate (14) is provided with a number of connecting holes (17) for airflow.

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