Negative pressure stirring device for blending rice milk

Abstract

The utility model discloses a negative-pressure stirring device for blending rice milk. The negative-pressure stirring device comprises a blending tank, a fixing opening and a milk discharging opening, wherein the fixing opening and the milk discharging opening are formed in the top and the bottom of the blending tank respectively. According to the utility model, under the interaction of the blending tank, the fixed port, the milk discharge port, the sealed fixed cylinder, the negative pressure mechanism, the stirring mechanism and the homogenizing mechanism, a closed negative pressure environment can be created through the negative pressure mechanism, so that the contact between rice milk and air is reduced, the oxidation reaction is inhibited, and the color and flavor of the rice milk are stable; a fixed ring pipe in the homogenizing mechanism is matched with a slurry discharging nozzle to uniformly spray a liquid material, stirring rods distributed in an annular array, a pressing stirring rod and a wall scraping plate are combined, rice slurry can be turned up and down, the tank wall can be cleaned, the mixing uniformity is improved, wall sticking residues are avoided, and a bottom slurry discharging pipe and a water discharging pipe are designed to facilitate material discharging and equipment cleaning; the electronic control valve accurately controls on-off of fluid in each link, the whole structure is compact, functions are synergistic, the rice milk blending process is effectively optimized, and the production efficiency and the product quality are improved.

Description

Technical Field

[0001] This utility model relates to the field of rice milk production and processing technology, and in particular to a negative pressure stirring device for rice milk preparation. Background Technology

[0002] Rice noodles are a specialty snack in southern China, often simply called "fen" by people in Jiangxi province. Made from rice, rice noodles are strips or strands produced through soaking, steaming, and pressing processes. They are soft yet chewy, elastic, and don't become mushy when boiled or break easily when stir-fried. Served with various toppings or broths, they are delicious and flavorful, making them a favorite among many consumers.

[0003] Currently, in the process of rice noodle production, factories use mixing tanks to mix rice slurry. Traditional mixing tanks lack effective negative pressure control methods and cannot isolate air from contact with the rice slurry, leading to accelerated oxidation, yellowing of the rice slurry, and deterioration of flavor. On the other hand, the stirring mechanism is designed in a simple way, and the stirring blades can only disturb the central area of ​​the tank. Raw materials are prone to deposit on the tank walls and bottom, resulting in insufficient mixing uniformity. Moreover, the shear force generated by high-speed stirring will destroy the colloidal structure of the rice slurry, reducing its viscosity and extensibility. In addition, the solubility of gases is high under normal pressure, and the air bubbles mixed in during the stirring process are difficult to be naturally discharged, requiring an additional defoaming process, which increases production costs and process complexity. Therefore, we propose a negative pressure stirring device for rice slurry mixing to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings in the above-mentioned background technology and to propose a negative pressure stirring device for rice paste preparation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A negative pressure stirring device for rice slurry preparation includes a mixing tank and a fixed port and a slurry discharge port respectively opened at the top and bottom of the mixing tank. A sealed fixed cylinder communicating with the fixed port is fixedly installed on the top of the mixing tank.

[0007] A negative pressure mechanism is provided on the outer wall of the sealing and fixing cylinder;

[0008] The negative pressure mechanism includes a feed inlet at the top of the sealed fixed cylinder. A sealing locking plate capable of locking the feed inlet is rotatably connected to the top of the sealed fixed cylinder. A slurry inlet, a water inlet, a vacuum inlet, and a vacuum breaking hole are provided on the outer wall of the sealed fixed cylinder. Matching slurry inlet pipes, water inlet pipes, vacuum inlet pipes, and vacuum breaking pipes are fixedly installed on the outer wall of the sealed fixed cylinder. Electronic control valves are fixedly sleeved on the outer walls of the slurry inlet pipe, water inlet pipe, vacuum inlet pipe, and vacuum breaking pipe.

[0009] The mixing tank is equipped with a stirring mechanism at the bottom;

[0010] The stirring mechanism includes a drive motor fixedly installed at the bottom of the mixing tank, and a rotating shaft extending into the mixing tank is fixedly installed at the output end of the drive motor. Multiple stirring rods are fixedly installed on the outer wall of the rotating shaft.

[0011] Preferably, a slurry discharge pipe and a drain pipe are fixedly installed at the bottom of the mixing tank, the slurry discharge pipe and the slurry discharge port are connected, and electronic control valves are also fixedly installed on the outer walls of the slurry discharge pipe and the drain pipe.

[0012] Preferably, a plurality of downward stirring rods are fixedly installed on the outer wall of the rotating shaft, and scraper plates that slide against the inner wall of the mixing tank are fixedly installed at the ends of the stirring rods and the ends of the downward stirring rods.

[0013] Preferably, a guide funnel communicating with the feed inlet is fixedly installed at the top of the sealed fixing cylinder.

[0014] Preferably, the multiple stirring rods in the same layer are arranged in a ring array on the outer wall of the rotating shaft.

[0015] Preferably, a homogenizing mechanism is provided on the inner wall of the mixing tank. The homogenizing mechanism includes a fixed ring pipe fixedly installed on the inner wall of the mixing tank. The slurry inlet and the fixed ring pipe are fixedly connected and communicated through a bent pipe. Multiple slurry outlets are opened at the bottom of the fixed ring pipe, and multiple slurry discharge nozzles connected to the slurry outlets are fixedly installed at the bottom of the fixed ring pipe.

[0016] Preferably, the mixing tank, the fixed port, the rotating shaft, and the fixed ring pipe are all arranged coaxially.

[0017] The beneficial effects of this utility model are as follows:

[0018] Through the interaction of the mixing tank, fixed port, discharge port, sealed fixed cylinder, negative pressure mechanism, stirring mechanism, and homogenizing mechanism, the negative pressure mechanism creates a closed negative pressure environment, reducing the contact between rice slurry and air, inhibiting oxidation reaction, and ensuring the stability of the color and flavor of the rice slurry. The fixed ring pipe in the homogenizing mechanism, together with the discharge nozzle, can spray liquid materials evenly. Combined with the ring array of stirring rods, downward stirring rods, and wall scrapers, the rice slurry can be turned up and down and the tank wall can be cleaned, improving the mixing uniformity and avoiding residue sticking to the wall. The bottom discharge pipe and drain pipe are designed to facilitate material discharge and equipment cleaning. Electronic control valves precisely control the flow of fluids in each link. The overall structure is compact and the functions are coordinated, effectively optimizing the rice slurry mixing process and improving production efficiency and product quality. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the negative pressure stirring device for rice slurry preparation proposed in this utility model;

[0020] Figure 2This is a top view of the stirring mechanism in the negative pressure stirring device for rice slurry preparation proposed in this utility model;

[0021] Figure 3 This is a top view of the homogenizing mechanism in the negative pressure stirring device for rice slurry preparation proposed in this utility model;

[0022] Figure 4 This is a top sectional view of the sealed fixed cylinder in the negative pressure stirring device for rice paste preparation proposed in this utility model.

[0023] In the diagram: 1. Mixing tank; 2. Fixed port; 3. Slurry discharge port; 4. Sealed fixed cylinder; 5. Feed inlet; 6. Sealed locking plate; 7. Slurry inlet; 8. Water inlet; 9. Vacuum port; 10. Vacuum breaking hole; 11. Slurry inlet pipe; 12. Water inlet pipe; 13. Vacuum pipe; 14. Vacuum breaking pipe; 15. Electronic control valve; 16. Drive motor; 17. Rotating shaft; 18. Stirring rod; 19. Slurry discharge pipe; 20. Drain pipe; 21. Downward stirring rod; 22. Scraper; 23. Feed funnel; 24. Fixed ring pipe; 25. Bent pipe; 26. Slurry outlet; 27. Slurry discharge nozzle. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Reference Figure 1 and Figure 4 The negative pressure stirring device for rice slurry preparation includes a mixing tank 1 and a fixed port 2 and a discharge port 3 respectively opened at the top and bottom of the mixing tank 1. A sealed fixed cylinder 4 connected to the fixed port 2 is fixedly installed at the top of the mixing tank 1. A discharge pipe 19 and a drain pipe 20 are fixedly installed at the bottom of the mixing tank 1. The discharge pipe 19 and the discharge port 3 are connected. Electronic control valves 15 are also fixedly installed on the outer walls of the discharge pipe 19 and the drain pipe 20.

[0026] To further explain, the discharge pipe 19 and drain pipe 20 at the bottom of the mixing tank 1 facilitate the discharge of rice slurry and washing water, and the electronic control valve 15 can precisely control the timing and flow rate of discharge and drainage, which is convenient for production process control and equipment cleaning and maintenance.

[0027] like Figure 1 and Figure 4As shown, a negative pressure mechanism is provided on the outer wall of the sealing and fixing cylinder 4; the negative pressure mechanism includes a feed inlet 5 opened at the top of the sealing and fixing cylinder 4, a sealing locking plate 6 that can lock the feed inlet 5 is rotatably connected to the top of the sealing and fixing cylinder 4, a slurry inlet 7, a water inlet 8, a vacuum port 9 and a vacuum breaking hole 10 are opened on the outer wall of the sealing and fixing cylinder 4, and a matching slurry inlet pipe 11, water inlet pipe 12, vacuum port 13 and vacuum breaking pipe 14 are fixedly installed on the outer wall of the sealing and fixing cylinder 4, and an electronic control valve 15 is fixedly sleeved on the outer wall of the slurry inlet pipe 11, water inlet pipe 12, vacuum port 13 and vacuum breaking pipe 14;

[0028] To further explain, the negative pressure control of the internal environment of the mixing tank 1 can be achieved through the feed inlet 5, sealing locking plate 6, slurry inlet 7, water inlet 8, vacuum port 9, vacuum breaking hole 10 on the sealed fixed cylinder 4, as well as the corresponding pipes and electronic control valves 15. This can prevent the rice slurry from having too much contact with the outside air during the mixing process, reduce oxidation and other reactions, ensure the quality of the rice slurry, and also facilitate the intake and uniform mixing of materials.

[0029] like Figure 1 As shown, a guide funnel 23 communicating with the feed inlet 5 is fixedly installed at the top of the sealed and fixed cylinder 4.

[0030] To further explain, the feed funnel 23 allows the material entering from the feed inlet 5 to flow more smoothly into the mixing tank 1, preventing the material from accumulating or spilling at the feed inlet 5, and improving the efficiency and accuracy of feeding.

[0031] like Figure 1 and Figure 2 As shown, a stirring mechanism is provided at the bottom of the mixing tank 1; the stirring mechanism includes a drive motor 16 fixedly installed at the bottom of the mixing tank 1, a rotating shaft 17 extending into the mixing tank 1 is fixedly installed at the output end of the drive motor 16, and a plurality of stirring rods 18 are fixedly installed on the outer wall of the rotating shaft 17.

[0032] To further explain, the drive motor 16 in the stirring mechanism drives the rotating shaft 17 and the stirring rod 18 to rotate, which can stir the rice paste in the mixing tank 1, so that the rice paste is fully mixed with water, additives, etc., and the uniformity of the mixing is improved.

[0033] like Figure 1-2 As shown, multiple downward stirring rods 21 are fixedly installed on the outer wall of the rotating shaft 17. The ends of the stirring rods 18 and the ends of the downward stirring rods 21 are all fixedly installed with scraper plates 22 that slide against the inner wall of the mixing tank 1.

[0034] To further explain, the downward stirring rod 21 allows the rice slurry to tumble more thoroughly during the stirring process, improving the stirring effect. The scraper plate 22 can scrape off the rice slurry stuck to the inner wall of the mixing tank 1, preventing the rice slurry from sticking to the wall and ensuring the uniformity of the rice slurry mixing. It also facilitates the cleaning of the equipment.

[0035] like Figure 2 As shown, multiple stirring rods 18 in the same layer are arranged in a ring array on the outer wall of the rotating shaft 17.

[0036] To further explain, this design allows the stirring force to be applied evenly to the rice slurry in the mixing tank 1, ensuring that the rice slurry is fully stirred in all locations, thereby further improving the uniformity of stirring.

[0037] like Figure 1 , Figure 3 and Figure 4 As shown, a homogenizing mechanism is provided on the inner wall of the mixing tank 1. The homogenizing mechanism includes a fixed ring pipe 24 fixedly installed on the inner wall of the mixing tank 1. The slurry inlet 7 and the fixed ring pipe 24 are fixedly connected and communicated through a bent pipe 25. Multiple slurry outlets 26 are opened at the bottom of the fixed ring pipe 24. Multiple slurry discharge nozzles 27 connected to the slurry outlets 26 are fixedly installed at the bottom of the fixed ring pipe 24.

[0038] To further explain, this design allows the rice slurry entering the mixing tank 1 to be evenly sprayed into the mixing tank 1 through the discharge nozzle 27 at the bottom of the fixed ring pipe 24, avoiding the rice slurry from concentrating in one place and helping to improve the uniformity of rice slurry mixing.

[0039] like Figure 1 As shown, the mixing tank 1, the fixed port 2, the rotating shaft 17, and the fixed ring pipe 24 are all arranged coaxially.

[0040] To further explain, this design ensures the symmetry and stability of the mixing and homogenizing mechanisms, resulting in more uniform mixing and distribution of rice slurry, and smoother equipment operation.

[0041] The functional principle of this utility model can be explained through the following operation methods:

[0042] I. Initial State Check and Parameter Setting

[0043] Confirm valve status

[0044] Check that all electronically controlled valves 15 (slurry inlet pipe 11, water inlet pipe 12, vacuum extraction pipe 13, vacuum breaking pipe 14, slurry discharge pipe 19, and drainage pipe 20) are closed to prevent accidental leakage of materials or gases.

[0045] Ensure that the sealing locking plate 6 tightly covers the inlet 5 of the sealing fixing cylinder 4 and is firmly fixed by the locking structure (such as bolts or buckles) to ensure the sealing performance of the device.

[0046] Setting process parameters

[0047] Based on the rice milk formula requirements, preset parameters such as vacuum pressure (e.g., -0.05MPa to -0.08MPa), stirring time (e.g., 10-15 minutes), and stirring speed (e.g., 200-300 rpm) in the control system (if applicable).

[0048] II. Material Input and Establishment of Negative Pressure Environment

[0049] Add solid materials

[0050] Open the sealing locking plate 6 and pour solid materials (such as rice flour, additives, etc.) into the sealing fixing cylinder 4 through the feed inlet 5. Use the guide funnel 23 to guide the materials smoothly into the mixing tank 1 to avoid spillage. After the material is added, immediately close and lock the sealing locking plate 6 to ensure that the feed inlet 5 is sealed.

[0051] Connecting to liquid material pipeline

[0052] Connect the slurry inlet pipe 11 to the liquid rice slurry raw material storage tank, and connect the water inlet pipe 12 to a water source (such as a pure water pipeline).

[0053] Establish a negative pressure environment

[0054] Open the vacuum tube 13 valve and vacuum pump in sequence to evacuate the mixing tank 1 and the sealed fixing cylinder 4 until the preset pressure value is reached (monitored by pressure gauge). During the evacuation process, observe whether there is any air leakage at each connection of the device (such as whether there is airflow sound at the seal). If any abnormality is found, the machine should be stopped for troubleshooting.

[0055] III. Material Mixing and Stirring

[0056] Injecting liquid materials and water

[0057] Open the valve of the slurry inlet pipe 11. Under negative pressure, the liquid rice slurry raw material enters the fixed ring pipe 24 through the slurry inlet 7 and the curved pipe 25. It is then evenly sprayed into the mixing tank 1 through the bottom slurry discharge nozzle 27. According to the formula ratio, open the valve of the water inlet pipe 12 and inject a certain amount of clean water (or other liquid auxiliary materials). The liquid material and water are evenly distributed through the fixed ring pipe 24 to avoid uneven concentration in some areas.

[0058] Start the stirring mechanism

[0059] Turn on the drive motor 16, and the rotating shaft 17 drives the stirring rods 18 (distributed in a ring array) and the downward stirring rods 21 to rotate synchronously;

[0060] Stirring rod 18: Performs horizontal circular stirring of the middle layer material, promoting the circulation of rice slurry;

[0061] The downward stirring rod 21 generates a downward thrust, causing the upper layer of material to sink and the lower layer of material to rise, thus achieving mixing between the upper and lower layers.

[0062] Scraper 22: Slides close to the inner wall of mixing tank 1 to scrape off material adhering to the wall and prevent residue from dead corners. During the mixing process, monitor the mixing status through the observation window (if present) or the control system to ensure that no material accumulates.

[0063] IV. Vacuum Breaking and Unloading

[0064] Break the negative pressure state

[0065] After stirring is complete, first turn off the drive motor 16 to stop stirring, open the vacuum breaking pipe 14 valve to introduce outside air, and gradually balance the air pressure inside and outside the mixing tank 1 until the pressure gauge returns to zero.

[0066] Drain the finished rice milk

[0067] Open the valve of the discharge pipe 19, and the prepared rice slurry flows into the next process (such as storage tank, filling equipment, etc.) through the discharge port 26 and the discharge pipe 19. If it is necessary to drain the residual rice slurry, the device can be tilted appropriately or the discharge time can be extended to ensure that there is no residual material in the tank.

[0068] V. Equipment Cleaning and Maintenance

[0069] Cleaning and mixing tank 1

[0070] Close the slurry discharge pipe valve 19, open the water inlet pipe valve 12, and inject clean water (or cleaning solution) into the mixing tank 1. Start the drive motor 16, and run the stirring mechanism for 3-5 minutes, using the scraper 22 and water flow to flush the inner wall and stirring components. Open the drain pipe valve 20 to discharge the wastewater, and repeat the cleaning process 2-3 times until the outflowing liquid is clear and free of impurities.

[0071] Routine inspection and maintenance

[0072] Regularly check whether the sealing strip of the sealing locking plate 6 is aging and replace it in time to ensure sealing performance; clean the residue in the fixed ring pipe 24 and the slurry discharge nozzle 27 to prevent blockage; check the opening and closing sensitivity of the electronic control valve 15 to ensure that the opening and closing of each pipeline is normal.

[0073] Operating Precautions

[0074] Safety precautions: Wear protective gloves during operation and avoid contact with rotating parts or high-temperature materials (if heating processes are involved).

[0075] Negative pressure control: The sealing locking plate 6 shall not be opened under positive pressure unless necessary, to prevent material splashing.

[0076] Emergency shutdown: If abnormal vibration, unusual noise or leakage is detected in the equipment, immediately press the emergency stop button to cut off the power and troubleshoot the fault.

[0077] By following the above steps, the rice slurry can be evenly mixed under negative pressure, reducing the risk of oxidation and spoilage, while improving mixing efficiency and ease of equipment cleaning.

[0078] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A negative pressure stirring device for rice paste preparation, comprising a mixing tank (1) and a fixed port (2) and a discharge port (3) respectively opened at the top and bottom of the mixing tank (1), wherein a sealed fixed cylinder (4) communicating with the fixed port (2) is fixedly installed on the top of the mixing tank (1), characterized in that: A negative pressure mechanism is provided on the outer wall of the sealing and fixing cylinder (4); The negative pressure mechanism includes a feed inlet (5) at the top of the sealing and fixing cylinder (4). The top of the sealing and fixing cylinder (4) is rotatably connected to a sealing and locking plate (6) that can lock the feed inlet (5). The outer wall of the sealing and fixing cylinder (4) is provided with a slurry inlet (7), a water inlet (8), a vacuum inlet (9), and a vacuum breaking hole (10). The outer wall of the sealing and fixing cylinder (4) is fixedly installed with a matching slurry inlet pipe (11), a water inlet pipe (12), a vacuum inlet pipe (13), and a vacuum breaking pipe (14). Electronic control valves (15) are fixedly sleeved on the outer walls of the slurry inlet pipe (11), the water inlet pipe (12), the vacuum inlet pipe (13), and the vacuum breaking pipe (14). The mixing tank (1) is equipped with a stirring mechanism at the bottom; The stirring mechanism includes a drive motor (16) fixedly installed at the bottom of the mixing tank (1), and a rotating shaft (17) extending into the mixing tank (1) is fixedly installed at the output end of the drive motor (16). Multiple stirring rods (18) are fixedly installed on the outer wall of the rotating shaft (17).

2. The negative pressure stirring device for rice slurry preparation according to claim 1, characterized in that, The bottom of the mixing tank (1) is fixedly installed with a slurry discharge pipe (19) and a drain pipe (20). The slurry discharge pipe (19) and the slurry discharge port (3) are connected. Electronic control valves (15) are also fixedly installed on the outer walls of the slurry discharge pipe (19) and the drain pipe (20).

3. The negative pressure stirring device for rice slurry preparation according to claim 1, characterized in that, Multiple downward stirring rods (21) are fixedly installed on the outer wall of the rotating shaft (17). Both the end of the stirring rod (18) and the end of the downward stirring rod (21) are fixedly installed with scraper plates (22) that slide against the inner wall of the mixing tank (1).

4. The negative pressure stirring device for rice slurry preparation according to claim 1, characterized in that, The top of the sealed fixing cylinder (4) is fixedly installed with a guide funnel (23) that communicates with the feed inlet (5).

5. The negative pressure stirring device for rice slurry preparation according to claim 1, characterized in that, Multiple stirring rods (18) in the same layer are arranged in a ring array on the outer wall of the rotating shaft (17).

6. The negative pressure stirring device for rice slurry preparation according to claim 1, characterized in that, A homogenizing mechanism is provided on the inner wall of the mixing tank (1). The homogenizing mechanism includes a fixed ring pipe (24) fixedly installed on the inner wall of the mixing tank (1). The slurry inlet (7) and the fixed ring pipe (24) are fixedly connected and communicated through a bent pipe (25). The bottom of the fixed ring pipe (24) is provided with multiple slurry outlets (26). The bottom of the fixed ring pipe (24) is fixedly installed with multiple slurry discharge nozzles (27) connected to the slurry outlets (26).

7. The negative pressure stirring device for rice slurry preparation according to claim 6, characterized in that, The mixing tank (1), the fixed port (2), the rotating shaft (17), and the fixed ring pipe (24) are all arranged coaxially.

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