A stirring device for microbial fermentation facilitating cleaning

Abstract

This utility model discloses a stirring device for easy cleaning of microbial fermentation, including a fermentation tank. The top of the fermentation tank is fitted with a tank cover via a flange, and a servo motor is bolted to the top of the tank cover. In this utility model, a rinsing shell is fixedly installed on the upper part of the stirring shaft. As the servo motor drives the stirring shaft to rotate, the rinsing shell and rinsing nozzle rotate with the stirring shaft. Combined with the inclined spray angle, it achieves thorough rinsing of the inner wall of the fermentation tank. The fixed structure of the connecting ring and the water inlet pipe, together with the sealed bearing, ensures a stable supply of rinsing water and allows the rinsing shell to rotate freely, avoiding the risk of pipe entanglement or leakage. The tight fit between the annular sleeve and the stirring shaft enhances the rotational stability of the rinsing shell, ensuring long-term reliability. The U-shaped scraper frame and the rotating water flow work together to scrape away stubborn dirt and rinse away residues in time, solving the problem of incomplete cleaning in traditional devices.

Description

Technical Field

[0001] This utility model relates to the field of fermentation tank technology, and in particular to a stirring device for microbial fermentation that is easy to clean. Background Technology

[0002] In the microbial fermentation industry, the fermentation tank is a core piece of equipment, and its internal cleanliness directly affects fermentation efficiency and product quality.

[0003] Traditional fermenters typically employ only a single stirring function, requiring manual cleaning or external fixed cleaning devices after fermentation. This presents several problems: Firstly, manual cleaning is labor-intensive, inefficient, and fails to thoroughly remove viscous residues adhering to the tank walls and stirring components, easily leading to cross-contamination of microorganisms. Secondly, fixed cleaning devices have fixed nozzle positions, allowing only specific areas to be rinsed, leaving cleaning dead zones, especially at tank corners and on the back of the stirring blades. Accumulated dirt in these areas can severely impact subsequent fermentation. Furthermore, some devices with rotary cleaning functions often suffer from problems such as pipe entanglement, unstable water supply, or seal failure due to poorly designed connection structures between the rinsing pipes and rotating components. Entanglement occurs either because the rotating components cause the pipes to rotate synchronously, or water leakage occurs due to insufficient sealing performance, wasting water resources and affecting equipment lifespan and the workshop environment. Additionally, traditional devices lack coordinated design between stirring and cleaning functions, making it difficult to effectively handle stubborn dirt, further reducing cleaning effectiveness and equipment utilization.

[0004] To address this, a stirring device for microbial fermentation that is easy to clean is proposed. It has the advantages of integrating stirring and rotational cleaning, eliminating dead corners in cleaning, having a stable structure, and being reliably sealed, thereby solving the problems mentioned in the background technology. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a stirring device for microbial fermentation that is easy to clean.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a stirring device for easy-to-clean microbial fermentation, comprising a fermentation tank, a tank cover mounted on the top of the fermentation tank via a flange, a servo motor fixed to the top of the tank cover via bolts, a stirring shaft fixed to the output end of the servo motor via a coupling, two stirring components fixed to the lower surface of the stirring shaft, a rinsing shell fixed to the upper surface of the stirring shaft via screws, and an annular water cavity provided inside the rinsing shell, a connecting ring installed on the top surface of the rinsing shell corresponding to the annular water cavity, a sealed bearing installed between the connecting ring and the rinsing shell, and a water inlet pipe fixed to the top surface of the connecting ring via screws, one end of the water inlet pipe penetrating and extending to the outside of the fermentation tank, a mounting base connected to the annular water cavity welded to the side of the rinsing shell, and a rinsing nozzle mounted at an angle on the surface of the mounting base, the water outlet of the rinsing nozzle facing the inner wall of the fermentation tank, a feed inlet provided on the top surface of the tank cover, and a discharge inlet connected to the bottom of the fermentation tank.

[0007] As a further description of the above technical solution: a scraper frame that matches the contour of the inner wall of the fermentation tank is fixed at the bottom of the stirring shaft, and the scraper frame has a U-shaped structure as a whole. Chamfers are provided on the left and right sides of the bottom of the scraper frame, and a reinforcing rod that is welded to the stirring shaft is provided at the upper end of the scraper frame.

[0008] As a further description of the above technical solution: the rinsing shell is generally ring-shaped, and an annular sleeve is welded and installed at the center of the rinsing shell, the inner diameter of the annular sleeve being matched with the diameter of the stirring shaft.

[0009] As a further description of the above technical solution: the stirring assembly is composed of a plurality of stirring blades arranged around the axis of the stirring shaft, and each stirring blade of the stirring assembly has a plurality of columnar protrusions welded on both sides.

[0010] As a further description of the above technical solution: the top surface of the flushing shell has an annular opening corresponding to the connecting ring, and the sealing bearing is installed in the gap between the annular opening and the connecting ring.

[0011] As a further description of the above technical solution: the top surface of the can lid is provided with an oblique insertion hole corresponding to the water inlet pipe, and the inner diameter of the oblique insertion hole is larger than the outer diameter of the water inlet pipe, and a sealing rubber ring is filled in the gap between the oblique insertion hole and the water inlet pipe.

[0012] This utility model has the following beneficial effects: In this invention, a rinsing shell is fixedly installed on the upper part of the stirring shaft. As the servo motor drives the stirring shaft to rotate, the rinsing shell and rinsing nozzle rotate with the stirring shaft. Combined with the inclined spray angle, it achieves thorough rinsing of the inner wall of the fermenter without dead angles. The fixed structure of the connecting ring and the water inlet pipe, together with the sealed bearing, ensures a stable supply of rinsing water and allows the rinsing shell to rotate freely, avoiding the risk of pipe entanglement or leakage. The tight fit between the annular sleeve and the stirring shaft enhances the rotational stability of the rinsing shell, ensuring long-term reliability. The U-shaped scraper frame and the rotating water flow work together to scrape away stubborn dirt and rinse away residues in time, solving the problem of incomplete cleaning in traditional devices. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a stirring device for microbial fermentation that is easy to clean according to the present invention; Figure 2 This is a schematic diagram of the stirring shaft. Figure 3 This is a top view of the flushing shell.

[0014] Legend: 1. Fermentation tank; 2. Tank lid; 3. Servo motor; 4. Stirring shaft; 5. Washing shell; 6. Stirring assembly; 7. Scraper frame; 8. Discharge nozzle; 9. Feed nozzle; 10. Water inlet pipe; 11. Mounting base; 12. Washing nozzle; 13. Reinforcing rod; 14. Connecting ring; 15. Sealed bearing; 16. Annular sleeve. Detailed Implementation

[0015] 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.

[0016] According to an embodiment of the present invention, a stirring device for microbial fermentation that is easy to clean is provided.

[0017] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-3As shown, a stirring device for easy-to-clean microbial fermentation according to an embodiment of the present invention includes a fermentation tank 1. A tank cover 2 is mounted on the top of the fermentation tank 1 via a flange, and a servo motor 3 is bolted to the top of the tank cover 2. A stirring shaft 4 is fixed to the output end of the servo motor 3 via a coupling. Two stirring components 6 are fixed to the lower surface of the stirring shaft 4, and a rinsing shell 5 is fixed to the upper surface of the stirring shaft 4 via screws. The rinsing shell 5 has an annular water cavity inside, and a connecting ring 14 is installed on the top surface of the rinsing shell 5 corresponding to the annular water cavity. The connecting ring 14 is connected to the rinsing shell 5. A sealed bearing 15 is installed between the gaps, and a water inlet pipe 10 is fixed to the top surface of the connecting ring 14 by screws. One end of the water inlet pipe 10 passes through and extends to the outside of the fermentation tank 1. A mounting base 11 connected to the annular water cavity is welded to the side of the rinsing shell 5, and a rinsing nozzle 12 is installed at an angle on the surface of the mounting base 11. The water outlet end of the rinsing nozzle 12 is set towards the inner wall of the fermentation tank 1. A feed inlet 9 is provided on the top surface of the tank cover 2, and a discharge nozzle 8 is connected to the bottom of the fermentation tank 1. A connecting ring 14 is installed on the top surface of the rinsing shell 5 corresponding to the annular water cavity. The connecting ring 14 and the water inlet pipe 10 are shaped together. The components are integrated into a single structure, with a sealed bearing 15 installed between the connecting ring 14 and the rinsing shell 5. The sealed bearing 15 allows the connecting ring 14 and the rinsing shell 5 to rotate relative to each other. A water inlet pipe 10 is fixed to the top surface of the connecting ring 14 by screws. One end of the water inlet pipe 10 passes through and extends to the outside of the fermenter 1 to facilitate connection with an external water source. A mounting base 11 connected to the annular water cavity is welded to the side of the rinsing shell 5, and a rinsing nozzle 12 is installed at an angle on the surface of the mounting base 11. The water outlet of the rinsing nozzle 12 faces the inner wall of the fermenter 1. When the stirring shaft 4 rotates under the drive of the servo motor 3, the rinsing shell 5 rotates synchronously with the stirring shaft 4, thereby driving the rinsing nozzle 12 to rotate together, realizing all-round rotation rinsing of the inner wall of the fermentation tank 1, effectively cleaning the residue on the inner wall. The top surface of the tank cover 2 is provided with a feed nozzle 9 for adding materials into the fermentation tank 1. The bottom of the fermentation tank 1 is connected to a discharge nozzle 8 for discharging the fermented materials and the wastewater after cleaning. The fermentation tank 1 is also equipped with a temperature sensor, a pressure gauge and a pressure relief valve to meet the requirements of temperature detection of fermented materials, gas pressure detection inside the fermentation tank 1 and convenient pressure relief in the later stage. Please refer to Figure 1 and Figure 2A scraper frame 7, matching the contour of the inner wall of the fermentation tank 1, is fixed to the bottom of the stirring shaft 4. The scraper frame 7 has a U-shaped structure and chamfers on both sides of its bottom. A reinforcing rod 13, welded to the stirring shaft 4, is located at the top of the scraper frame 7, enhancing the stability of the connection between the scraper frame 7 and the stirring shaft 4. During the rotation of the stirring shaft 4, the scraper frame 7 rotates with it. Its U-shaped structure matches the contour of the inner wall of the fermentation tank 1, allowing it to scrape away stubborn residues adhering to the inner wall of the fermentation tank 1. The scraped residues are then promptly washed away by the water flow from the rinsing nozzle 12, which rotates with the stirring shaft 4. The scraper frame 7 and the rinsing nozzle 12 work together to further improve the cleaning effect on the inner wall of the fermentation tank 1. The chamfered design at the bottom reduces friction between the scraper frame 7 and the bottom of the fermentation tank 1 during rotation, making the rotation smoother.

[0018] Please refer to Figure 1-3 The flushing shell 5 has an overall annular structure, and an annular sleeve 16 is welded and installed at the center of the flushing shell 5. The inner diameter of the annular sleeve 16 matches the diameter of the stirring shaft 4. The flushing shell 5 can be tightly fitted onto the stirring shaft 4 and fixed firmly with screws, ensuring that the stirring shaft 4 can stably drive the flushing shell 5 to rotate synchronously. Since the connecting ring 14 and the water inlet pipe 10 form an integral part and are rotatably connected to the flushing shell 5 through the sealed bearing 15, when the flushing shell 5 rotates with the stirring shaft 4, the connecting ring 14 and the water inlet pipe 10 remain fixed. This ensures that the flushing water can smoothly enter the annular water cavity of the flushing shell 5 through the water inlet pipe 10 and the connecting ring 14, and does not affect the connection stability between the water inlet pipe 10 and the external water source due to the rotation of the flushing shell 5. The annular structure of the flushing shell 5 also allows the water flow in the internal annular water cavity to be more evenly distributed to each flushing nozzle 12.

[0019] Please refer to Figure 1 and Figure 2 The stirring assembly 6 consists of several stirring blades arranged around the axis of the stirring shaft 4. Each stirring blade of the stirring assembly 6 has several columnar protrusions welded to both sides. During the stirring process, the stirring assembly 6 rotates with the stirring shaft 4. The stirring blades can fully stir the materials in the fermentation tank 1, and the columnar protrusions can further enhance the disturbance effect on the materials, making the materials more uniform and improving the fermentation efficiency. When cleaning is performed, the water sprayed from the rinsing nozzle 12, which rotates with the stirring shaft 4, will rinse the stirring assembly 6. The columnar protrusions increase the surface area of ​​the stirring blades, and the rotating water flow can more thoroughly rinse all parts of the stirring blades and the columnar protrusions, effectively cleaning the residues attached to the stirring assembly 6 and ensuring the cleanliness of the stirring assembly 6.

[0020] Please refer to Figure 2 and Figure 3The top surface of the flushing shell 5 has an annular opening corresponding to the connecting ring 14. The sealing bearing 15 is installed in the gap between the annular opening and the connecting ring 14. The connecting ring 14 and the water inlet pipe 10 form an integral structure. It passes through the annular opening and is connected to the annular water cavity of the flushing shell 5. The sealing bearing 15 is tightly installed in the gap between the two. On the one hand, the sealing bearing 15 provides stable support for the relative rotation between the connecting ring 14 and the flushing shell 5, ensuring the smoothness of the flushing shell 5 when it rotates with the stirring shaft 4. On the other hand, the sealing bearing 15 can effectively seal the gap between the two, preventing water in the annular water cavity inside the flushing shell 5 from leaking out of the gap, ensuring that all the flushing water can be sprayed out through the flushing nozzle 12, thereby improving the utilization rate of water resources and the flushing effect.

[0021] Please refer to Figure 1 The top surface of the tank lid 2 has an angled insertion hole corresponding to the water inlet pipe 10, and the inner diameter of the angled insertion hole is larger than the outer diameter of the water inlet pipe 10. A sealing ring is filled in the gap between the angled insertion hole and the water inlet pipe 10. Since the connecting ring 14 and the water inlet pipe 10 form a single unit and do not rotate with the stirring shaft 4, the water inlet pipe 10 needs to extend through the tank lid 2 to the outside. The design of the angled insertion hole can accommodate the installation angle of the water inlet pipe 10, and the setting that the inner diameter of the angled insertion hole is larger than the outer diameter of the water inlet pipe 10 provides a certain amount of installation and adjustment space for the water inlet pipe 10, avoiding rigid friction between the water inlet pipe 10 and the tank lid 2 due to installation errors. The sealing ring filling the gap effectively seals the gap between the two, preventing gas leakage inside the fermenter 1 or external impurities from entering the tank. It also prevents water leakage from the gap during rinsing, ensuring the airtightness of the fermenter 1 and the cleanliness of the working environment.

[0022] Working principle: In operation, when the fermenting material in fermenter 1 is stirred, the stirring shaft 4 is driven to rotate by the servo motor 3, which in turn drives the two stirring components 6 at the bottom to rotate synchronously. The multiple stirring blades and columnar protrusions on the surface of the stirring components 6 fully agitate the material in fermenter 1, achieving uniform mixing and ensuring the consistency of the microbial fermentation reaction. At the same time, the U-shaped scraper frame 7 at the bottom of the stirring shaft 4 rotates with the shaft, which can initially scrape off the material attached to the tank wall, reducing local deposition during the fermentation process. After fermentation, an external water source is connected through the water inlet pipe 10, and the water flows through the connecting ring 14 into the annular water chamber of the rinsing shell 5. Since the connecting ring 14 and the water inlet pipe 10 form a fixed whole and are rotatably connected to the rinsing shell 5 through the sealed bearing 15, when the stirring shaft 4 drives the rinsing shell 5 to rotate, the water inlet pipe 10 remains stationary while the rinsing shell 5 rotates synchronously with the shaft. The water flow in the annular water chamber is sprayed out through the inclined rinsing nozzle 12, and the rotating nozzle forms a 360° all-round water flow coverage, directly rinsing the inner wall of fermenter 1. At the same time, the scraper frame 7 rotates with the stirring shaft 4, scraping off stubborn residues and flushing them to the bottom of the tank with the water flow, and finally discharging the wastewater through the discharge nozzle 8, thus completing the cleaning process.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A stirring device for microbial fermentation that is easy to clean, comprising a fermenter (1), characterized in that: The fermenter (1) has a tank cover (2) installed on its top via a flange, and a servo motor (3) is fixed to the top of the tank cover (2) via bolts. The output end of the servo motor (3) is fixed to a stirring shaft (4) via a coupling, and two stirring components (6) are fixed to the lower surface of the stirring shaft (4). A rinsing shell (5) is fixed to the upper surface of the stirring shaft (4) via screws, and an annular water cavity is provided inside the rinsing shell (5). A connecting ring (14) is installed on the top surface of the rinsing shell (5) corresponding to the annular water cavity, and the gap between the connecting ring (14) and the rinsing shell (5) is... A sealed bearing (15) is installed between the two parts, and a water inlet pipe (10) is fixed to the top surface of the connecting ring (14) by screws. One end of the water inlet pipe (10) passes through and extends to the outside of the fermentation tank (1). A mounting seat (11) connected to the annular water cavity is welded to the side of the rinsing shell (5), and a rinsing nozzle (12) is installed obliquely on the surface of the mounting seat (11). The water outlet end of the rinsing nozzle (12) is set towards the inner wall of the fermentation tank (1). A feed nozzle (9) is set on the top surface of the tank cover (2), and a discharge nozzle (8) is connected to the bottom of the fermentation tank (1).

2. The easy-to-clean stirring device for microbial fermentation according to claim 1, characterized in that: The bottom of the stirring shaft (4) is fixed with a scraper frame (7) that matches the outline of the inner wall of the fermentation tank (1), and the scraper frame (7) has a U-shaped structure. The left and right sides of the bottom of the scraper frame (7) are chamfered, and the upper end of the scraper frame (7) is provided with a reinforcing rod (13) that is welded to the stirring shaft (4).

3. The easy-to-clean stirring device for microbial fermentation according to claim 1, characterized in that: The rinsing shell (5) is an overall ring structure, and an annular sleeve (16) is welded and installed at the center of the rinsing shell (5). The inner diameter of the annular sleeve (16) matches the diameter of the stirring shaft (4).

4. The easy-to-clean stirring device for microbial fermentation according to claim 1, characterized in that: The stirring assembly (6) is composed of several stirring blades arranged around the axis of the stirring shaft (4), and each stirring blade of the stirring assembly (6) has several columnar protrusions welded on both sides.

5. The easy-to-clean stirring device for microbial fermentation according to claim 1, characterized in that: The top surface of the flushing shell (5) has an annular opening corresponding to the connecting ring (14), and the sealing bearing (15) is installed in the gap between the annular opening and the connecting ring (14).

6. The easy-to-clean stirring device for microbial fermentation according to claim 1, characterized in that: The top surface of the can lid (2) is provided with an oblique insertion hole corresponding to the water inlet pipe (10), and the inner diameter of the oblique insertion hole is larger than the outer diameter of the water inlet pipe (10), and a sealing ring is filled in the gap between the oblique insertion hole and the water inlet pipe (10).

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