Mixing batch feeder for pharmaceutical industry
By using a pneumatically driven bidirectional alternating motion of the structure, the problem of uneven mixing in traditional pharmaceutical mixing and feeding machines is solved, achieving uniform mixing of drug components and improving drug quality and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-03-17
AI Technical Summary
Traditional pharmaceutical mixing and feeding machines are prone to creating mixing dead zones and unevenness when processing pharmaceutical raw materials with high viscosity or large density differences, leading to unstable drug quality and even endangering patient safety.
The mixing plate, which is pneumatically driven, moves in two directions alternately. By pneumatically driving the mixing plate to move relative to each other in the mixing cylinder, the dead zones of mixing are reduced, and the drug components are mixed evenly.
It improves the mixing uniformity and quality stability of drugs, reduces fluctuations in the effective components of drug ingredients, and enhances drug safety.
Smart Images
Figure CN223995926U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of pharmaceutical mixing technology, specifically relating to a pharmaceutical mixing and feeding machine. Background Technology
[0002] In the pharmaceutical manufacturing industry, drug quality is directly related to people's lives, health, and safety; even the slightest quality defect can lead to serious consequences. The mixing process of pharmaceutical raw materials, as a crucial step in drug production, plays a decisive role in the final quality of the drug.
[0003] Traditional pharmaceutical mixing and feeding machines have revealed a series of serious problems in actual production. In terms of mixing methods, most traditional equipment uses fixed stirring blades, which typically rotate at a constant speed and in a single direction. This simple mixing method has significant limitations, only effectively affecting a small area of raw materials around the blades. The problems are particularly pronounced when mixing pharmaceutical raw materials with special physical properties. For example, when handling highly viscous raw materials, these materials tend to adhere to the inner wall and bottom of the mixing drum, forming areas that are difficult to mix; and for raw materials with significant density differences, during mixing, heavier materials quickly settle to the bottom of the mixing drum, while lighter materials float to the top, resulting in uneven mixing. According to relevant research, when using traditional mixing methods to process drugs containing raw materials of different densities, approximately 30% of batches exhibit deviations in the content of active ingredients exceeding the allowable range.
[0004] In terms of mixing uniformity, traditional mixing and feeding machines struggle to meet the stringent requirements of modern pharmaceutical production. Because pharmaceutical raw materials vary in particle size, density, shape, and other physical properties, simple stirring is insufficient to break up their aggregated state, easily leading to stratification or localized aggregation. In the production of compound drugs, if the raw materials of different components are not mixed uniformly, the content of the active ingredient in the drug will fluctuate. Patients may not only fail to achieve the expected therapeutic effect after taking the medication but may also face safety risks. For example, if the active ingredients of certain antihypertensive drugs are not mixed uniformly, patients may experience unstable blood pressure control after taking them, which can even be life-threatening in severe cases.
[0005] To address this, we have proposed a pharmaceutical mixing and feeding machine. This device uses a unique pneumatic drive structure to propel the mixing plate in a bidirectional alternating motion. Compared to traditional single-direction stirring or mixing methods, it can more comprehensively agitate pharmaceutical raw materials, reduce mixing dead zones, and make pharmaceutical raw materials of different components more evenly mixed, thereby improving the stability of drug quality. Utility Model Content
[0006] The purpose of this invention is to provide a pharmaceutical mixing and feeding machine. Through a unique pneumatic drive structure, the mixing plate can be driven to move in both directions alternately. Compared with the traditional single-direction stirring or mixing method, it can more comprehensively turn over the pharmaceutical raw materials, reduce mixing dead corners, and make the pharmaceutical raw materials with different components more evenly mixed, thereby improving the stability of drug quality.
[0007] The specific technical solution adopted by this utility model is as follows:
[0008] A pharmaceutical mixing and feeding machine includes a support leg and a mixing cylinder disposed on the top of the support leg. A telescopic component is disposed on the top of the mixing cylinder, and a pneumatically driven mixing component is disposed on the telescopic component.
[0009] The pneumatically driven mixing assembly includes a bracket disposed at the telescopic end of the telescopic assembly. A movable ring is installed at the bottom of the bracket. A sealing cavity is formed inside the movable ring. A first elastic component is disposed on the bottom inner wall of the sealing cavity. A movable sealing ring is disposed on the first elastic component. A first L-shaped conduit and a second L-shaped conduit communicating with the sealing cavity are formed at the bottom of the movable ring. The first L-shaped conduit and the second L-shaped conduit are disposed opposite to each other. A piston assembly is disposed inside the first L-shaped conduit and the second L-shaped conduit. A pushing mixing plate is disposed on the piston assembly. An air intake hose communicating with the sealing cavity is disposed at the top of the movable ring.
[0010] Furthermore, the telescopic assembly includes an electrically operated telescopic rod disposed at the top of the mixing cylinder, the telescopic end of which is connected to the bracket.
[0011] Furthermore, the piston assembly includes through holes formed in the first L-shaped guide tube and the second L-shaped guide tube. A movable rod is disposed inside the through hole. One end of the movable rod is connected to the pushing mixing plate, and a piston disc is disposed at the other end of the movable rod. A second spring is sleeved on the movable rod, and the second spring is located on one side of the piston disc.
[0012] Furthermore, the mixing cylinder is provided with multiple feed pipes and one discharge pipe.
[0013] Furthermore, the first elastic component includes a connecting rod disposed on the inner wall at the bottom of the sealing cavity, the connecting rod being fitted with the movable sealing ring and the first spring, the bottom of the movable sealing ring being provided with the first spring, and the top of the connecting rod being provided with a limiting plate.
[0014] Furthermore, the mixing plate is equipped with a cleaning brush.
[0015] The technical effects achieved by this utility model are as follows:
[0016] First, an external air pump is connected via an air inlet hose (the air pump operates with indirect air supply). Compressed air enters the sealed chamber. As the air pressure inside the chamber increases, the pressure acts on the movable sealing ring. The movable sealing ring overcomes the elastic force of the first elastic component, causing it to move downwards. The movable sealing ring allows compressed air to enter the first and second L-shaped conduits, thus activating the piston assembly. Because the first and second L-shaped conduits are positioned opposite each other, the piston assembly causes the two pushing mixing plates to move relative to each other. Simultaneously, the telescopic component drives the bracket to pneumatically push the mixing assembly to move inside the mixing cylinder, thereby more comprehensively agitating the pharmaceutical raw materials, reducing mixing dead zones, and ensuring more uniform mixing of different pharmaceutical raw materials, improving drug quality. When the air pressure inside the sealed chamber decreases, the elastic force of the first elastic component causes the movable sealing ring to return to its original position, while the piston assembly causes the pushing mixing plates to return to their original position. This process repeats continuously to achieve thorough mixing of the drug solution. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0018] Figure 2 This is a schematic diagram of the internal structure of this utility model;
[0019] Figure 3 This is an exploded view of the present invention;
[0020] Figure 4 This is a schematic diagram of the structure of the second L-shaped conduit of this utility model.
[0021] The attached diagram lists the components represented by each number as follows:
[0022] 1. Support leg; 2. Mixing cylinder; 3. Bracket; 4. Moving ring; 5. Sealing cavity; 6. Moving sealing ring; 7. First L-shaped conduit; 8. Second L-shaped conduit; 9. Pushing mixing plate; 10. Air inlet hose; 11. Electric telescopic rod; 12. Movable rod; 13. Piston disc; 14. Second spring; 15. Feed pipe; 16. Discharge pipe; 17. Connecting rod; 18. First spring. Detailed Implementation
[0023] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.
[0024] like Figures 1-4 As shown, the technical solution adopted by this utility model is as follows: a pharmaceutical mixing and feeding machine includes a support leg 1 and a mixing cylinder 2 disposed on the top of the support leg 1. A telescopic component is disposed on the top of the mixing cylinder 2, and a pneumatically driven mixing component is disposed on the telescopic component.
[0025] The pneumatically driven mixing assembly includes a bracket 3 disposed at the telescopic end of the telescopic assembly. A movable ring 4 is installed at the bottom of the bracket 3. A sealing cavity 5 is opened inside the movable ring 4. A first elastic component is disposed on the bottom inner wall of the sealing cavity 5. A movable sealing ring 6 is disposed on the first elastic component. A first L-shaped conduit 7 and a second L-shaped conduit 8 communicating with the sealing cavity 5 are opened at the bottom of the movable ring 4. The first L-shaped conduit 7 and the second L-shaped conduit 8 are disposed opposite to each other. A piston assembly is disposed inside the first L-shaped conduit 7 and the second L-shaped conduit 8. A pushing mixing plate 9 is disposed on the piston assembly. An air intake hose 10 communicating with the sealing cavity 5 is disposed at the top of the movable ring 4.
[0026] The telescopic assembly includes an electric telescopic rod 11 installed at the top of the mixing drum 2. The telescopic end of the electric telescopic rod 11 is connected to the bracket 3, and the bracket 3 is moved up and down by the electric telescopic rod 11.
[0027] Meanwhile, the first elastic component includes a connecting rod 17 disposed on the inner wall of the bottom of the sealer. A movable sealing ring 6 and a first spring 18 are sleeved on the connecting rod 17. The first spring 18 is disposed at the bottom of the movable sealing ring 6, and a limiting plate is disposed at the top of the connecting rod 17. When the movable sealing ring 6 is subjected to external air pressure, the movable sealing ring 6 moves on the connecting rod 17 and squeezes the first spring 18, so that the movable sealing ring 6 can squeeze air to work.
[0028] It should be noted that, under the premise of the operation of the movable sealing ring 6, the sealing treatment must be strictly guaranteed. That is, the connection between the connecting rod 17 and the movable sealing ring 6 must be sealed. The fit clearance between the connecting rod 17 and the movable sealing ring 6 must be controlled within the range of 0.05-0.1mm. If it is too large, it will cause gas leakage; if it is too small, it will increase frictional resistance and affect the axial movement of the movable sealing ring 6. A sealing ring with a lip structure (such as a lip seal) is embedded between the movable sealing ring 6 and the connecting rod 17. The sealing performance is enhanced by air pressure self-tightening. At the same time, a rubber layer can be set on the outside of the movable sealing ring 6 to further improve the sealing performance.
[0029] The piston assembly includes a through hole formed in a first L-shaped guide tube 7 or a second L-shaped guide tube 8. A movable rod 12 is provided inside the through hole. One end of the movable rod 12 is connected to the push mixing plate 9, and the other end of the movable rod 12 is provided with a piston disc 13. A second spring 14 is sleeved on the movable rod 12 and is located on one side of the piston disc 13.
[0030] Under the action of air pressure, the piston disc 13 moves inside the first L-shaped guide tube 7 or the second L-shaped guide tube 8. The piston disc 13 drives the movable rod 12 to move the mixing plate 9 and squeeze the second spring 14, thus promoting mixing. At the same time, the elastic force of the second spring 14 causes the piston disc 13 to return to its original position for the next operation.
[0031] It should be noted that: the piston disc 13 has a double sealing ring groove on its edge, on which a main sealing ring (fluororubber) and an auxiliary oil scraper ring (PTFE) are installed respectively, forming a stepped seal to block the axial leakage path of gas. At the same time, a copper-based graphite bushing (inner diameter tolerance H7 grade) is installed in the L-shaped guide tube through hole, forming a sliding pair with the moving rod 12 (surface hard chrome plated, tolerance g6 grade), with the mating clearance controlled at 0.03-0.08mm. A bidirectional lip seal ring (material HNBR) is set at the entrance of the through hole and the moving rod 12, simultaneously blocking the intrusion of external particles and the leakage of internal gas.
[0032] The mixing cylinder 2 is equipped with multiple feed pipes 15 and one discharge pipe 16. Multiple medicinal liquids are introduced through the multiple feed pipes 15, and the mixed medicinal liquids are discharged through the discharge pipe 16.
[0033] The air intake pipe is connected to an external air pump, which is a high-pressure vortex air pump, a technology that is already in use, and will not be discussed in detail here.
[0034] Furthermore, the mixing plate 9 is equipped with a cleaning brush, which allows the present invention to clean the inner wall of the mixing cylinder 2. When cleaning the inner wall of the mixing cylinder 2, the air pump is first changed from intermittent to continuous. At this time, the mixing plate 9 is pushed to extend, thereby fitting against the inner wall of the mixing cylinder 2, and cleaning is performed by the cleaning brush.
[0035] The working principle of this utility model is as follows: First, an external air pump is connected through the air inlet hose 10 (the air pump operates in an indirect air supply mode). Compressed air enters the sealed cavity 5. As the air pressure inside the cavity increases, the pressure acts on the movable sealing ring 6. The movable sealing ring 6 overcomes the elastic force of the first elastic component, causing the movable sealing ring 6 to move downward. The movable sealing ring 6 causes the compressed air to enter the first L-shaped conduit 7 and the second L-shaped conduit 8, thereby making the piston assembly work. Since the first L-shaped conduit 7 and the second L-shaped conduit 8 are arranged opposite each other, the piston assembly causes the two pushing mixing plates 9 to move relative to each other. At the same time, the telescopic component drives the bracket 3 to pneumatically push the mixing assembly to move inside the mixing cylinder 2, thereby more comprehensively turning over the pharmaceutical raw materials, reducing mixing dead zones, and making the pharmaceutical raw materials of different components more evenly mixed, thus improving the quality of the medicine. When the air pressure inside the sealed cavity 5 decreases, the elastic force of the first elastic component causes the movable sealing ring 6 to return to its original position. At the same time, the piston assembly causes the pushing mixing plate 9 to return to its original position, and so on, to achieve full mixing of the liquid medicine.
[0036] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.
Claims
1. A pharmaceutical mixing feeder, comprising support legs (1) and a mixing cylinder (2) arranged on the top of the support legs (1), wherein a telescopic assembly is arranged on the top of the mixing cylinder (2), and a pneumatic pushing and mixing assembly is arranged on the telescopic assembly. characterized in that The pneumatic pushing and mixing assembly comprises a bracket (3) arranged on the telescopic end of the telescopic assembly, wherein a moving ring (4) is arranged on the bottom of the bracket (3), a sealed cavity (5) is arranged in the moving ring (4), a first elastic assembly is arranged on the bottom inner wall of the sealed cavity (5), a moving sealing ring (6) is arranged on the first elastic assembly, a first L-shaped conduit (7) and a second L-shaped conduit (8) are arranged on the bottom of the moving ring (4) and communicate with the sealed cavity (5), the first L-shaped conduit (7) and the second L-shaped conduit (8) are arranged oppositely, a piston assembly is arranged in each of the first L-shaped conduit (7) and the second L-shaped conduit (8), a pushing and mixing plate (9) is arranged on the piston assembly, and an air inlet hose (10) is arranged on the top of the moving ring (4) and communicates with the sealed cavity (5).
2. The pharmaceutical compounder of claim 1, wherein: The telescopic assembly comprises an electric telescopic rod (11) arranged on the top of the mixing cylinder (2), wherein the telescopic end of the electric telescopic rod (11) is connected with the bracket (3).
3. The pharmaceutical compounder of claim 1, wherein: The piston assembly comprises a through hole arranged in the first L-shaped conduit (7) and the second L-shaped conduit (8), wherein an activity rod (12) is arranged in the through hole, one end of the activity rod (12) is connected with the pushing and mixing plate (9), a piston disc (13) is arranged on the other end of the activity rod (12), a second spring (14) is sleeved on the activity rod (12), and the second spring (14) is located on one side of the piston disc (13).
4. The pharmaceutical compounder of claim 1, wherein: A plurality of feeding pipes (15) and one discharging pipe (16) are arranged on the mixing cylinder (2).
5. The pharmaceutical compounder of claim 1 wherein: The first elastic assembly comprises a connecting rod (17) arranged on the bottom inner wall of the sealed cavity (5), wherein the moving sealing ring (6) and a first spring (18) are sleeved on the connecting rod (17), the moving sealing ring (6) is arranged on the bottom of the first spring (18), and a limiting disc is arranged on the top of the connecting rod (17).
6. The pharmaceutical compounder of claim 1, wherein: A dedusting brush is arranged on the pushing and mixing plate (9).