Natto fermentation device

Abstract

The utility model belongs to the technical field of fermentation devices, and particularly relates to a natto fermentation device which comprises a device bottom plate, centering positioning fixtures are arranged on two sides of the top surface of the device bottom plate, a fermentation tank is clamped and fixed on the device bottom plate through the centering positioning fixtures, the fermentation tank is a tank body with an opening in the top end, and an electric push rod is fixed on the rear side of the device bottom plate. The top end of the electric push rod is supported and connected with an equipment plate, the front part of the equipment plate is rotationally connected with a hollow vertical shaft through a bearing seat, the hollow vertical shaft and the top end opening of the fermentation tank are coaxially arranged, and a plurality of horizontal hollow rods are fixedly communicated with the circumferential side of the part, below the equipment plate, of the hollow vertical shaft. According to the natto fermentation device, heat generated in the natto fermentation process is transmitted out in time through the hollow vertical shaft and the horizontal hollow rod, then natto in the fermentation process is heated through the electric heating rod so as to ensure that the fermentation temperature is in an interval which is most suitable for fermentation, and bacillus subtilis grows in a balanced manner, so that the fermentation speed and the fermentation quality of the natto can be improved.

Description

Technical Field

[0001] This utility model relates to the field of fermentation equipment technology, specifically a natto fermentation device. Background Technology

[0002] Natto is a soybean product made by fermenting soybeans with Bacillus subtilis. It not only retains the nutritional value of soybeans but also improves the digestibility and absorption of protein. More importantly, the fermentation process produces many physiologically active substances that have health benefits. During natto fermentation, the fermentation temperature affects both the quality and speed of the fermentation. Currently, natto fermentation typically uses a fermentation tank. Soybeans and yeast containing Bacillus subtilis are mixed evenly in a specific ratio and placed in the fermentation tank. The tank is then left in an environment suitable for the survival and reproduction of Bacillus subtilis for a period of time. Fermentation is stopped once the natto is observed to be fully fermented. The natto itself generates heat during fermentation, which is collected within the fermentation tank and promptly dissipated. Furthermore, the fermentation process requires even mixing of natto from different parts of the tank to allow Bacillus subtilis to grow and multiply.

[0003] Patent CN219807935U discloses a natto fermentation device, including a base and a support structure. The support structure is installed on the base and supports a load-bearing structure set on the support structure. The load-bearing structure is used for fermenting natto without affecting quality or reducing the taste of natto. The structure is simple and easy to use. However, analysis reveals the following shortcomings of this natto fermentation device: First, it cannot regulate the fermentation temperature during operation, resulting in poor control over fermentation efficiency and quality. Second, it cannot mix the fermenting bacteria during fermentation, leading to uneven fermentation and compromised overall natto quality. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a natto fermentation device that solves the problems mentioned in the background section.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0008] A natto fermentation device includes a base plate with centrally positioned clamps on both sides of the top surface of the base plate. A fermentation tank, which is an open-top tank, is fixed to the base plate via the centrally positioned clamps. An electric push rod is fixed to the rear side of the base plate, and a device plate is supported and connected to the top of the electric push rod. A hollow vertical shaft is rotatably connected to the front of the device plate via a bearing seat. The hollow vertical shaft is coaxial with the top opening of the fermentation tank. A plurality of horizontal hollow rods are fixedly connected to the circumferential side of the hollow vertical shaft located below the device plate. Electric heating rods are embedded in the inner walls of the plurality of horizontal hollow rods. The power cords of the plurality of electric heating rods are inserted into the hollow vertical shaft. A motor is fixedly connected to the rear of the device plate, and the motor is connected to the hollow vertical shaft via a transmission mechanism.

[0009] Furthermore, a heating controller is fixedly connected to the center of the top surface of the equipment plate, and an electric slip ring is fixedly connected to the top of the hollow vertical shaft. The heating controller is electrically connected to several electric heating rods through the electric slip ring.

[0010] Furthermore, a sealing cover is fixedly connected to the bottom end of the bearing housing, and a limit switch is fixedly installed on the bottom edge of the sealing cover, with the limit switch located directly above the fermentation tank opening.

[0011] Furthermore, the centering positioning fixture includes a left and a right locking block that are movably fitted into the top surface of the device base plate on both sides, and a shaft seat fixed to the center of the bottom surface of the device base plate. A double-headed reverse screw is rotatably connected to the shaft seat, and the two ends of the double-headed reverse screw are respectively screwed to the bottom ends of the left and right locking blocks.

[0012] Furthermore, the transmission mechanism is a belt drive or a chain drive.

[0013] Furthermore, the outer circular surface of the hollow vertical shaft is fixedly connected to several flange ports, and the hollow vertical shaft is fixedly connected to the horizontal hollow rod through the flange ports.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, the present invention provides a natto fermentation device, which has the following beneficial effects:

[0016] This invention uses a hollow vertical shaft and a horizontal hollow rod to transfer the heat generated during the fermentation of natto in a timely manner. Then, an electric heating rod is used to heat the natto during the fermentation process to ensure that the fermentation temperature is within the range most suitable for fermentation, allowing Bacillus subtilis to grow evenly. Therefore, it can improve the fermentation speed and quality of natto.

[0017] This invention uses an electric push rod to form a lifting mechanism and an electric motor and transmission mechanism to form a stirring device, so that soybeans and Bacillus subtilis are evenly mixed in the natto tank, ensuring that every part of the soybean raw material can be fermented by Bacillus subtilis, thereby guaranteeing the overall quality of the natto fermentation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of the present utility model;

[0019] Figure 2 This is a front sectional view of the present invention.

[0020] Figure 3 This is a top view of the structure of this utility model.

[0021] In the diagram: 1. Device base plate; 2. Centered positioning clamp; 3. Fermentation tank; 4. Electric push rod; 5. Equipment plate; 6. Hollow vertical shaft; 7. Horizontal hollow rod; 8. Electric heating rod; 9. Electric motor; 10. Transmission mechanism; 11. Bearing seat; 12. Heating controller; 13. Electric slip ring; 14. Sealing cover; 15. Limit switch; 21. Left locking block; 22. Right locking block; 23. Shaft seat; 24. Double-ended reverse lead screw. Detailed Implementation

[0022] 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.

[0023] Example

[0024] like Figure 1 , 2 As shown in Figure 3, an embodiment of this utility model proposes a natto fermentation device, including a device base plate 1. Centered positioning clamps 2 are provided on both sides of the top surface of the device base plate 1. A fermentation tank 3 is fixedly attached to the device base plate 1 via the centered positioning clamps 2. The fermentation tank 3 is a tank with an open top. An electric push rod 4 is fixedly attached to the rear side of the device base plate 1. A device plate 5 is supported and connected to the top of the electric push rod 4. A hollow vertical shaft 6 is rotatably connected to the front part of the device plate 5 via a bearing seat 11. The hollow vertical shaft 6 is coaxially arranged with the top opening of the fermentation tank 3. Several horizontal hollow rods 7 are fixedly connected to the circumferential side of the hollow vertical shaft 6 located below the device plate 5. Electric heating rods 8 are embedded in the inner walls of the several horizontal hollow rods 7. The power lines of the several electric heating rods 8 are inserted into the hollow vertical shaft 6. A motor 9 is fixedly connected to the rear part of the device plate 5. The motor 9 is connected to the hollow vertical shaft 6 via a transmission mechanism 10.

[0025] In this embodiment, the electric push rod 4 drives the motor 9, transmission mechanism 10, hollow vertical shaft 6, and horizontal hollow rod 7 to move up and down, inserting the hollow vertical shaft 6 and horizontal hollow rod 7 into the fermentation tank 3, which is positioned in the centrally located positioning fixture 2. Then, the motor 9 drives the hollow vertical shaft 6 and horizontal hollow rod 7 to rotate through the transmission mechanism 10, stirring the natto raw material in the fermentation tank 3. If the temperature of the natto raw material in the fermentation tank 3 is lower than the growth temperature of the fermentation bacteria, the electric heating rod 8 is energized to heat the natto raw material. If the temperature of the natto raw material in the fermentation tank 3 is higher than the growth temperature of the fermentation bacteria, the horizontal hollow rod 7 and hollow vertical shaft 6 can also act as a heat dissipation mechanism to dissipate the heat generated during fermentation.

[0026] Furthermore, this type of natto fermentation device can be applied in two ways. First, one stirring device corresponds to one fermentation tank 3. The stirring and heating mechanism, consisting of a horizontal hollow rod 7 and a hollow vertical shaft 6, is started periodically to heat and stir the soybean raw material and fermentation bacteria in the fermentation tank 3. Second, the fermentation tank 3 is temporarily placed on the device base plate 1 by using the centering positioning clamp 2, and then the above-mentioned stirring, heating, or heat dissipation work is carried out. After the natto raw material in the fermentation tank 3 is fully mixed and the temperature is within the suitable range for the growth of fermentation bacteria, the horizontal hollow rod 7 and the hollow vertical shaft 6 are pulled out of the opening of the fermentation tank 3 by the electric push rod 4. Then, the current fermentation tank 3 is moved out of the centering positioning clamp 2, and another fermentation tank 3 is used to perform the above operation. Therefore, it has the advantage of flexible operation.

[0027] Furthermore, a heating controller 12 is fixedly connected to the middle of the top surface of the equipment plate 5, and an electric slip ring 13 is fixedly connected to the top of the hollow vertical shaft 6. The heating controller 12 is electrically connected to several electric heating rods 8 through the electric slip ring 13.

[0028] Therefore, when the hollow vertical axis 6 and the horizontal hollow rod 7 rotate, the heating controller 12 can still input current to the electric heating rod 8 through the electric slip ring 13 to heat the natto raw materials in the fermentation tank 3.

[0029] Furthermore, a sealing cover 14 is fixedly connected to the bottom end of the bearing housing 11, and a limit switch 15 is fixedly installed on the bottom side of the sealing cover 14. The limit switch 15 is located directly above the inlet of the fermenter 3.

[0030] When the electric push rod 4 pulls the equipment plate 5 and the sealing cover 14 down until the limit switch 15 touches the top of the fermentation tank 3, the electric push rod 4 stops descending, and the motor 9 can drive the hollow vertical shaft 6 and the horizontal hollow rod 7 to rotate through the transmission mechanism 10.

[0031] Furthermore, the centering positioning fixture 2 includes a left locking block 21 and a right locking block 22 that are movably fitted into the top surfaces of the device base plate 1, and a bearing seat 23 fixed to the center of the bottom surface of the device base plate 1. A double-headed reverse screw 24 is rotatably connected in the bearing seat 23, and the two ends of the double-headed reverse screw 24 are respectively screwed to the bottom ends of the left locking block 21 and the right locking block 22.

[0032] Therefore, the centering positioning clamp 2 takes the shaft seat 23 as the center point, and drives the left clamping block 21 and the right clamping block 22 to open and close through the double-headed reverse screw 24, so as to center and position the fermentation tank 3 placed on the top surface of the device base plate 1, so that it is located directly below the hollow vertical shaft 6 and the horizontal hollow rod 7, making it convenient for the hollow vertical shaft 6 and the horizontal hollow rod 7 to be inserted into the fermentation tank 3.

[0033] Furthermore, the transmission mechanism 10 is a belt drive or a chain drive.

[0034] Both the belt drive pair and the chain drive pair can transmit the power of the motor 9 to the hollow vertical shaft 6 and the horizontal hollow rod 7, causing them to rotate so as to stir the natto raw materials contained in the fermentation tank 3.

[0035] Furthermore, several flange ports are fixedly connected to the outer circular surface of the hollow vertical shaft 6, and the hollow vertical shaft 6 is fixedly connected to the horizontal hollow rod 7 through the flange ports.

[0036] Therefore, the horizontal hollow rod 7 can be disassembled and replaced with the hollow vertical shaft 6 through the flange port, which can reduce production and installation costs.

[0037] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A natto fermentation device comprising a device base plate (1), characterized by: The both sides of the top surface of the device base plate (1) are provided with central positioning fixtures (2), the device base plate (1) is clamped and fixed with a fermentation tank (3) through the central positioning fixtures (2), the fermentation tank (3) is a tank body with an open top end, the rear side of the device base plate (1) is fixed with an electric push rod (4), the top end of the electric push rod (4) is supported and connected with an equipment plate (5), the front part of the equipment plate (5) is rotatably connected with a hollow vertical shaft (6) through a bearing seat (11), the hollow vertical shaft (6) is coaxially arranged with the top open end of the fermentation tank (3), a plurality of horizontal hollow rods (7) are fixed and communicated with the circumferential side of the position below the equipment plate (5), the inner walls of the plurality of horizontal hollow rods (7) are all embedded and mounted with electric heating rods (8), the power lines of the plurality of electric heating rods (8) all penetrate into the hollow vertical shaft (6), the rear part of the equipment plate (5) is fixedly connected with an electric motor (9), and the electric motor (9) is connected with the hollow vertical shaft (6) through a transmission mechanism (10).

2. The device for fermenting natto according to claim 1, wherein: The top surface of the equipment plate (5) is fixedly connected with a heating controller (12), the top end of the hollow vertical shaft (6) is fixedly connected with an electric slip ring (13), and the heating controller (12) is electrically connected with the plurality of electric heating rods (8) through the electric slip ring (13).

3. The device for fermenting natto according to claim 1, wherein: The bottom end of the bearing seat (11) is fixedly connected with a sealing cover (14), the bottom edge side of the sealing cover (14) is fixedly mounted with a travel switch (15), and the travel switch (15) is located directly above the mouth of the fermentation tank (3).

4. The device for fermenting natto according to claim 1, wherein: The central positioning fixture (2) comprises left and right clamping blocks (21) and (22) movably embedded on the top surface of the device base plate (1) and a shaft seat (23) fixedly arranged at the central position of the bottom surface of the device base plate (1), a double-head reverse screw rod (24) is rotatably connected in the shaft seat (23), and the two ends of the double-head reverse screw rod (24) are respectively screw-connected with the bottom ends of the left and right clamping blocks (21) and (22).

5. The device for fermenting natto according to claim 1, wherein: The transmission mechanism (10) is a belt transmission pair or a chain transmission pair.

6. The device for fermenting natto according to claim 1, wherein: A plurality of flange ports are fixedly communicated with the edge side of the outer circumferential surface of the hollow vertical shaft (6), and the horizontal hollow rods (7) are fixedly connected with the hollow vertical shaft (6) through the flange ports.

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