A pneumatic stirring device

Abstract

The utility model relates to a kind of pneumatic stirring device.Application is used in biological pharmacy clean room, comprising: outer cover, flange, stirring shaft, stirring paddle, compressed air inlet valve, compressed air outlet valve, impeller and bearing;Flange is used to connect with the tank body of biological pharmacy, tank body is reaction tank, mixing tank or liquid preparation tank;Impeller is connected with stirring shaft, and stirring paddle is connected to the lower end of stirring shaft;Bearing is sleeved in the outside of stirring shaft, for supporting the rotation of stirring shaft;Outer cover is connected with flange, and impeller is completely covered in it;Air inlet and air outlet are equipped on the side wall of outer cover, respectively connected with inlet valve and outlet valve.The utility model aims at solving the following technical problems: in the prior art, stirring device is combined by motor and stirring paddle, motor housing has dense cooling fins, and the gap between cooling fins is difficult to clean in place, forming cleaning dead angle, and cleaning personnel need to spend a lot of time cleaning, and incomplete cleaning will affect the sterile environment of clean room.

Description

Technical Field

[0001] This utility model relates to the field of biopharmaceutical equipment technology, and in particular to a pneumatic stirring device. Background Technology

[0002] With the rapid development of the biopharmaceutical industry, stirring devices, as key equipment in the biopharmaceutical production process, have a significant impact on product quality due to their performance and cleanliness. In biopharmaceutical cleanrooms, stirring devices are mainly used for mixing and reacting materials in reaction vessels, mixing tanks, or dispensing tanks.

[0003] Currently, the most commonly used mixing devices in the biopharmaceutical industry are electric mixing devices. These devices typically consist of a motor and a stirring paddle; the motor drives the stirring shaft, which in turn rotates the stirring paddle to achieve material mixing.

[0004] However, due to regulatory requirements in the biopharmaceutical field, cleanroom equipment must be free of material residue, oil stains, and fingerprints; product-contacting parts must be sterile; and equipment dead corners must be free of dust. Existing mixing devices, due to the dense heat sinks on the motor casing, create gaps between the fins that are difficult to clean thoroughly. These cleaning dead corners can become breeding grounds for microorganisms, posing a potential threat to the sterile environment of the cleanroom. Cleaning personnel need to spend a significant amount of time cleaning these areas, and incomplete cleaning will directly affect the quality and safety of biopharmaceutical products.

[0005] Furthermore, electric stirring devices generate heat during operation, requiring cooling fins for dissipation. This not only increases cleaning difficulty but may also adversely affect temperature-sensitive biopharmaceutical products. Additionally, electric equipment poses certain safety hazards in humid environments, increasing risks during production.

[0006] Therefore, there is an urgent need for a simple, easy-to-clean, safe and reliable stirring device to meet the stringent requirements of biopharmaceutical cleanrooms for equipment cleanliness and safety. Utility Model Content

[0007] The purpose of this utility model is to solve the following technical problem: In the prior art, the stirring device is composed of a motor and a stirring paddle. The motor housing has dense heat sinks, and the gaps between the heat sinks are difficult to clean thoroughly, forming cleaning dead corners. Cleaning personnel need to spend a lot of time cleaning, and if the cleaning is not thorough, it will affect the sterile environment of the clean room.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] According to one aspect of this utility model, a pneumatic stirring device is provided for use in a biopharmaceutical cleanroom, comprising: an outer cover, a flange, a stirring shaft, a stirring paddle, a compressed air inlet valve, a compressed air outlet valve, an impeller, and a bearing; the flange is used to connect to a biopharmaceutical tank, the tank being a reaction tank, a mixing tank, or a liquid preparation tank; the impeller is connected to the stirring shaft, and the lower end of the stirring shaft is connected to the stirring paddle; the bearing is sleeved outside the stirring shaft to support the rotation of the stirring shaft; the outer cover is connected to the flange and completely encloses the impeller; the side wall of the outer cover is provided with an air inlet and an air outlet, which are respectively connected to the air inlet valve and the air outlet valve.

[0010] Optionally, the impeller has multiple bolt through holes at its bottom, and the stirring shaft has matching threaded holes, with the impeller and the stirring shaft connected by bolts.

[0011] Optionally, the number of bolt through holes is four.

[0012] Optionally, the air inlet valve and the air outlet valve are respectively located on both sides of the outer cover.

[0013] Optionally, the inlet valve and outlet valve are handle-operated valves used to control the impeller speed by adjusting the air volume.

[0014] Alternatively, the outer cover may be a stainless steel cover with a polished outer surface.

[0015] Optionally, the impeller is a pneumatic impeller, driven to rotate by compressed air.

[0016] Optionally, the agitator includes a sleeve and a plurality of blades integrally formed with the sleeve, the sleeve being fitted onto the lower end of the agitator shaft for connection.

[0017] Optionally, the blades are arranged uniformly along the circumference of the sleeve.

[0018] Alternatively, the flange and the outer cover can be connected by welding or bolting.

[0019] The advantages of this invention are as follows: By using compressed air to drive the impeller rotation, traditional motor control is replaced with pneumatic control, avoiding cleaning dead zones formed by the motor's heat sink; the entire stirring device has a simpler structure, is easier to clean, and reduces the workload of cleaning personnel; the stainless steel outer casing is polished, reducing roughness and making it easier to clean, effectively ensuring the sterile environment of the cleanroom; simultaneously, this pneumatic stirring device also has the advantages of reducing energy consumption and improving equipment efficiency. Compared with existing technologies, the pneumatic stirring device of this invention completely solves the problem of difficult cleaning of traditional motor heat sinks, and is particularly suitable for the extremely high hygiene requirements of biopharmaceutical cleanroom environments. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the pneumatic stirring device described in this utility model;

[0022] Figure 2 This is a schematic diagram of the interior of the outer cover described in this utility model;

[0023] Figure 3 This is a schematic diagram of the impeller structure described in this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the stirring paddle described in this utility model.

[0025] In the diagram: 1. Outer cover; 2. Flange; 3. Agitator shaft; 4. Agitator blade; 401. Sleeve; 402. Blade; 5. Inlet valve; 6. Outlet valve; 7. Impeller; 701. Bolt through hole; 8. Bearing. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1:

[0028] like Figures 1-4 As shown, a pneumatic stirring device is used in a biopharmaceutical cleanroom, including an outer cover 1, a flange 2, a stirring shaft 3, a stirring paddle 4, a compressed air inlet valve 5, a compressed air outlet valve 6, an impeller 7, and a bearing 8.

[0029] The flange 2 of the pneumatic agitator is used to connect to the tank in a biopharmaceutical process, which can be a reaction vessel, mixing vessel, or dispensing vessel. Flange 2 is made of stainless steel, possessing sufficient strength and corrosion resistance to ensure safe use in biopharmaceutical environments. Flange 2 and the outer casing 1 are connected by welding or bolting to form a sealed, integrated structure. When welding is used, the weld seam must be ground to ensure a smooth surface; when bolting is used, multiple bolt holes are evenly distributed along the edges of flange 2 and outer casing 1, and the connection is secured with high-strength bolts.

[0030] The core component of the device is the pneumatic impeller 7, which is connected to the stirring shaft 3. The impeller 7 is a pneumatic impeller driven by compressed air, and its design generates efficient rotational torque when compressed air flows. The bottom of the impeller 7 has multiple bolt through holes 701, specifically four bolt through holes 701, evenly distributed at the bottom. The stirring shaft 3 has matching threaded holes, and the impeller 7 is securely connected to the stirring shaft 3 using countersunk bolts. This connection method ensures coaxiality between the impeller 7 and the stirring shaft 3, reduces vibration during operation, and improves stirring efficiency.

[0031] A stirring shaft 3 runs through the entire device, connected to the impeller 7 at the upper end and the stirring paddle 4 at the lower end. The stirring shaft 3 is made of high-strength stainless steel, with a precision-machined and polished surface to ensure stability and durability during high-speed rotation. A bearing 8 is fitted onto the outside of the stirring shaft 3, supporting its rotation, reducing friction, and improving operating efficiency. The bearing 8 is a sealed bearing suitable for the biopharmaceutical environment, preventing lubricant leakage and contamination of the pharmaceuticals.

[0032] The stirring paddle 4 includes a sleeve 401 and multiple blades 402 integrally formed with the sleeve 401. The sleeve 401 is fitted onto the lower end of the stirring shaft 3 for connection and can be fixed by a keyway or fastening screws to ensure that the stirring paddle 4 rotates synchronously with the stirring shaft 3. The blades 402 are evenly arranged along the circumference of the sleeve 401 to form a symmetrical structure, reducing eccentric forces during the stirring process and improving the uniformity of stirring. The shape and angle of the blades 402 are optimized to achieve efficient stirring in liquids of different viscosities.

[0033] The outer casing 1 is connected to the flange 2 and completely encloses the impeller 7, forming a closed space. The outer casing 1 is made of stainless steel, and its outer surface is polished, which is not only aesthetically pleasing but also facilitates cleaning and disinfection, meeting the hygiene requirements of biopharmaceutical cleanrooms. The design of the outer casing 1 takes into account the rational distribution of airflow, and the internal space is sufficient to accommodate the high-speed rotation of the impeller 7 while ensuring that compressed air can effectively drive the impeller 7.

[0034] The outer wall of the outer casing 1 is equipped with an air inlet and an air outlet, which are connected to the air inlet valve 5 and the air outlet valve 6, respectively. The air inlet valve 5 and the air outlet valve 6 are located on opposite sides of the outer casing 1, forming a symmetrical layout to ensure uniform airflow distribution within the outer casing 1. Both the air inlet valve 5 and the air outlet valve 6 are lever-operated valves, allowing the operator to control the amount of air entering the impeller 7, thereby adjusting the impeller 7's rotational speed and achieving precise control over the stirring intensity. This design enables operators to flexibly adjust stirring parameters according to different stirring requirements.

[0035] During operation, the operator first connects and secures the flange 2 of the device to the biopharmaceutical tank, and then connects the compressed air source. The amount of compressed air entering the outer casing 1 is controlled by adjusting the opening of the inlet valve 5 and the outlet valve 6. After entering the outer casing 1, the compressed air impacts the blades of the impeller 7, causing the impeller 7 to generate rotational torque. The impeller 7 drives the stirring shaft 3 to rotate, which in turn drives the stirring paddle 4 to perform stirring operations within the tank. The used compressed air is discharged through the outlet valve 6, forming a continuous airflow cycle.

[0036] This pneumatic stirring device is designed to completely eliminate electrical components and the risk of electrical sparks, making it particularly suitable for use in flammable and explosive biopharmaceutical environments. Furthermore, all contact parts are made of stainless steel, meeting the hygiene requirements of biopharmaceutical manufacturing and facilitating cleaning and sterilization. The pneumatic drive system provides advantages such as a wide speed range, smooth start-up, and simple maintenance, meeting the diverse stirring process needs of the biopharmaceutical industry.

[0037] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A pneumatic stirring device for use in cleanrooms for biopharmaceutical applications, characterized in that, include: Outer casing, flange, stirring shaft, stirring paddle, compressed air inlet valve, compressed air outlet valve, impeller and bearing; The flange is used to connect to the tank of the biopharmaceutical, which is a reaction tank, mixing tank or liquid preparation tank; The impeller is connected to the stirring shaft, and the lower end of the stirring shaft is connected to the stirring paddle. The bearing is sleeved on the outside of the stirring shaft to support the rotation of the stirring shaft; The outer cover is connected to the flange and completely encloses the impeller inside; The outer cover has an air inlet and an air outlet on its side wall, which are connected to the air inlet valve and the air outlet valve, respectively.

2. The pneumatic stirring device according to claim 1, characterized in that, The impeller has multiple bolt through holes at its bottom, and the stirring shaft has matching threaded holes. The impeller and the stirring shaft are connected by bolts.

3. The pneumatic stirring device according to claim 2, characterized in that, The number of bolt through holes is 4.

4. The pneumatic stirring device according to claim 1, characterized in that, The air inlet valve and air outlet valve are respectively located on both sides of the outer cover.

5. The pneumatic stirring device according to claim 1, characterized in that, The inlet valve and outlet valve are handle-operated valves used to control the impeller speed by adjusting the air volume.

6. The pneumatic stirring device according to claim 1, characterized in that, The outer cover is made of stainless steel and its outer surface is polished.

7. The pneumatic stirring device according to claim 1, characterized in that, The impeller is a pneumatic impeller, which is driven to rotate by compressed air.

8. The pneumatic stirring device according to claim 1, characterized in that, The stirring paddle includes a sleeve and a plurality of blades integrally formed with the sleeve, and the sleeve is fitted onto the lower end of the stirring shaft for connection.

9. The pneumatic stirring device according to claim 8, characterized in that, The blades are evenly arranged along the circumference of the sleeve.

10. The pneumatic stirring device according to claim 1, characterized in that, The flange and the outer cover are connected by welding or bolts.

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