Soybean paste fermentation device

Abstract

The soybean sauce fermentation device comprises a tank body, a tank cover, a support frame for bearing the tank body, a wire harness channel arranged in the center of the tank cover and communicating with the tank body for penetrating into the air pipe, a center circular column extending upward to the center of the tank cover and arranged on the inner bottom surface of the tank body, a mounting part being a circular pipe, the circular pipe being tightly and rotatably sleeved on the outer periphery of the center circular column, a working part being a plate surface provided with a plurality of flow-out windows, at least two stirring tools with the plate surface extending from one side of the circular pipe to the wall of the tank body, and a transmission mechanism arranged above the stirring tools; the device adopts two or more stirring tools with independent power driving sources, the working part of the stirring tool is a plate surface, a plurality of openable and closable windows are arranged on the plate surface, this way mainly allows the fermentation mixture to flow out from the windows to recombine to form uniform mixing, obviously, it is not limited to single flow mixing, and the stirring tool can also be added with changes in rotating speed to form pushing mixing.

Description

Technical Field

[0001] This invention belongs to the technical field of equipment for making soybean paste, specifically relating to a high-efficiency, low-energy soybean paste fermentation device that can improve the integrity of soybean grains. Background Technology

[0002] Soybean paste, fermented bean paste, and other similar products are often fermented in large fermentation tanks. These tanks are typically equipped with stirring paddles to agitate, disperse, and break up air bubbles within the contents. The production process begins by adding the starter culture to the tank, along with salt water, and mixing thoroughly. A constant temperature is then applied around the tank to aid fermentation. The mixture is then stirred daily using either the stirring paddle or air agitation until the final product is produced after several days of fermentation. Throughout the fermentation process, ensuring adequate stirring and mixing to allow the microorganisms sufficient aerobic respiration, normal growth, and metabolism is crucial for guaranteeing product quality.

[0003] Air agitation utilizes air nozzles to eject high-speed air, which is dispersed in the liquid as bubbles. On the aerated side, the average liquid density decreases, while on the non-aerated side, the liquid density is higher, thus creating a density difference between the aerated and non-aerated sides. This results in the circulation of the liquid within the fermenter. However, existing air-agitated fermenters suffer from uneven mixing of gas and fermentation liquid.

[0004] The mixing paddle uses mechanical transmission to rotate the blades to achieve a mixing effect. The disadvantage of the mixing paddle is that it is difficult to achieve good mixing from top to bottom. As a result, the blades need to rotate many times and at a relatively high speed. Consequently, the collision of the blades will further damage the whole soybean grains and consume more energy.

[0005] The disadvantages of the two stirring methods mentioned above become more apparent as the mixture becomes increasingly viscous in the later stages of fermentation.

[0006] Chinese utility model patent CN217677455U discloses a chili sauce fermentation device. This utility model improves the stirring paddle by using a stirring motor to drive the connecting rod and stirring blades to rotate and stir the fermentation material in the container. The height can be adjusted before and after stirring by a height adjustment mechanism. This utility model also uses bolts to connect the detachable stirring blades, which can be replaced as needed to stir different materials. Moreover, the blade angle is designed between 20° and 60° to avoid damaging the raw materials when the blades rotate at high speed.

[0007] Chinese invention patent CN 106190787 B discloses a spiral air distributor for a fermenter and a fermenter, which is an improvement on the air distributor.

[0008] Chinese invention patent application CN 108936319 A discloses a method for preparing soybean paste that improves the integrity and flavor of soybean grains; the invention improves the integrity of soybean grains through process improvement.

[0009] In summary, the preparation of soybean paste requires a device that is highly efficient in stirring, consumes less energy, and can better ensure the integrity of soybean grains. Summary of the Invention

[0010] In view of the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a soybean paste fermentation device, which can set multiple combined stirring modes according to each fermentation stage, thereby achieving efficient and low-energy fermentation.

[0011] The objective of this invention is achieved through the following technical solution: a soybean paste fermentation device, comprising a tank, a tank cover, a support frame for supporting the tank, a wiring harness channel for inserting air pipes and electrical conduits located at the center of the tank cover and connected to the tank, a breathing channel for air exchange located at the center of the tank cover and connected to the tank, a discharge port located on the bottom surface of the tank body and connected to the outside, a manhole located on the tank cover, and a central annular column located at the center of the bottom surface of the tank body and extending upward to near the tank cover, the mounting part of which is a circular tube, the circular tube being tightly and rotatably fitted around the outer periphery of the central annular column, the working part being a plate surface with multiple drainage windows, at least two stirring tools extending from one side of the circular tube towards the side wall of the tank body, and a transmission mechanism located above the stirring tools; during operation, the starter culture and brine enter the tank through the manhole, and fermentation begins at a constant temperature on the outer periphery of the tank body. During fermentation, the transmission mechanism drives the stirring tools to stir in a timely manner, and the fermentation mixture flows out from each window of the stirring tool. The fermentation mixture flowing out from the upper and lower windows re-converges on the outflowing side to form a top-to-bottom mixing.

[0012] Preferably, two mixing tools are provided, and further designed as follows: the drainage windows of each mixing tool are arranged in multiple rows above and below and multiple columns to the left and right. The height of each row of drainage windows of the two mixing tools is staggered. Hinged doors are provided on the drainage windows. The size of each door is smaller than the drainage window. The upper edge of the door panel is rotatably hinged to the upper end of the side wall of the drainage window through a hinge, or the lower edge of the door panel is rotatably hinged to the lower end of the side wall of the drainage window through a hinge.

[0013] Preferably, the entire circumference of each window along its thickness direction is set as a concave arc surface. Each window has an airbag that can be inflated to the same curvature as the arc surface by hot pressing and bonding. An installation piece is fixedly installed on each of the two end faces at the highest position after the two mixing tools are installed. An air control valve that can individually control the air pressure of each airbag in each mixing tool is fixedly installed on the upper surface of each installation piece. An independent air passage is set inside the mixing tool plate, with one end connected to an airbag and the other end connected to the bottom of the air control valve and connected to the air control valve through an air pipe. A top pressure reset piece is set at the hinge, and a retractable protective sleeve is set on the outer surface of the top pressure reset piece.

[0014] Preferably, the fermentation apparatus also includes a lifting mechanism, which includes a lifting seat located above the stirring tool and tightly fitted around the outer periphery of the central annular column, a traction component located inside the central annular column that lifts the lifting seat by pulling a rope, a connecting component fixedly mounted on the lifting seat that can be connected or separated from the stirring tool, and a locking component that can lock the lifting seat in a set position.

[0015] Preferably, the lifting seat includes an upper fitting ring, a lower transmission mounting ring, and a motor mounting portion extending outward from the transmission mounting ring.

[0016] Preferably, the traction assembly includes a rope winch, a lifting unlocking ring fitted between the fitting ring and the transmission mounting ring and having vertical space for movement, and a rope roller assembly with one end fixedly connected to the winch's drum and the other end fixedly connected to the lifting unlocking ring.

[0017] Preferably, the connecting assembly includes a cylinder fixed to the outer periphery of the motor mounting part, a connector mounted on the telescopic rod of the cylinder, and a mounting part with a waist hole on the lower of the two stirring tools.

[0018] Preferably, the locking assembly includes a toothed band that is vertically and embeddedly fixed on the outer circumferential surface of the upper part of the central annular column, an elastic locking pin that abuts against or moves away from the toothed band to form a locking or disengaging action, and a locking pin mounting portion provided on the fitting ring for mounting the elastic locking pin.

[0019] Preferably, the middle section of the elastic locking pin is provided with an inclined guide groove, the inclination direction being away from the head of the elastic locking pin. An inclined surface is machined on the entire circumference of the edge facing upwards of the lifting unlocking ring. When the lifting unlocking ring is lifted, the inclined surface can enter the inclined guide groove. Under the contact of the two, the elastic locking pin is retracted under the guidance of the inclined surface of the inclined guide groove, and the head of the elastic locking pin disengages from the toothed belt.

[0020] Preferably, the transmission mechanism includes an internal gear ring and an external gear ring rotatably mounted in the lifting seat, a first motor that provides power to the internal gear ring, and a second motor that provides power to the external gear ring; both the internal gear ring and the external gear ring have continuous teeth on their undersides, and one of the two mounting members has a first single tooth meshing with the corresponding position of the internal gear ring, and the other has a second single tooth meshing with the corresponding position of the external gear ring.

[0021] In summary, the present invention has the following advantages compared with the prior art:

[0022] This invention employs two or more stirring tools with independent power sources. The working part of the stirring tool is a plate surface with multiple openable windows. This method mainly allows the fermentation mixture to flow out from each window and re-converge to form a mixing and stirring process. Obviously, it is not limited to simple confluence mixing; variations in the rotation speed of the stirring tools can also be incorporated to create a pushing and stirring process. Each stirring tool can rotate at the same speed or at different speeds, and can rotate in the same direction or in different directions. Depending on the size of the window opening, there are many combinable stirring modes. The stirring mode can be set and switched at each fermentation stage. During the fermentation process, this greatly reduces the impact of the original stirring paddle on the soybean paste and improves the integrity of the soybeans.

[0023] The windows, doors, and related components for opening and closing the mixing tool are all designed to prevent liquid from entering. This allows for cleaning by simply rinsing the surface, while any water stains in the gaps can be removed by disinfection and drying. The invention also includes a lifting mechanism, which not only assists in switching mixing modes (i.e., closing the windows) but also allows the mixing tool to be positioned at different heights for mixing. Furthermore, if maintenance or replacement of the mixing tool is required, after opening the tank lid, extending the end of the central annular column by a toothed section allows the mixing tool to be further lifted out of the tank, greatly improving the convenience of inspection and replacement. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the tank body of the present invention partially cut open;

[0026] Figure 3 This is a schematic diagram of the structure of a combination of a mixing tool, a transmission mechanism, and a lifting mechanism, including some components of the lifting mechanism after an explosion.

[0027] Figure 4 This is a schematic diagram of the combined structure of the mixing tool, transmission mechanism, and lifting mechanism.

[0028] Figure 5This is a schematic diagram of the combined structure of the mixing tool, transmission mechanism, and part of the lifting mechanism.

[0029] Figure 6 yes Figure 2 A magnified view of a section at point A in the middle;

[0030] Figure 7 yes Figure 4 A magnified view of a section at point B in the middle;

[0031] Figure 8 yes Figure 4 A magnified view of a section at point C;

[0032] Figure 9 This is a schematic diagram of the elastic locking pin structure;

[0033] Figure 10 yes Figure 5 A magnified view of a section at point D.

[0034] The diagram shows the following components: Tank body 01, Tank cover 02, Support frame 03, Wiring harness channel 04, Breathing channel 05, Central annular column 06, Discharge port 07, Manhole 08, Mixing tool 10, Drainage window 11, Window 12, Transmission mechanism 20, Arc surface 13, Airbag 14, Mounting component 15, Pneumatic control valve 16, Top pressure reset component 17, Lifting mechanism 30, Lifting seat 31, Traction assembly 32, Connecting assembly 33, Fitting ring 311, Transmission mounting ring 312, Motor mounting part 313, Lifting unlocking ring 321, Rope roller kit 322, Cylinder 331, Connector 332, Waist hole 333, Toothed belt 341, Elastic locking pin 342, Locking pin mounting part 343, Inclined guide groove 2a, Inclined surface 2b, Inner toothed ring 21, Outer toothed ring 22, First motor 23, Second motor 24, First single tooth 25, Second single tooth 26. Detailed Implementation

[0035] The present invention will be further described below with reference to the embodiments illustrated in the accompanying drawings:

[0036] Example 1

[0037] This disclosure provides a soybean paste fermentation apparatus. Figure 1 The overall structure of the device is shown. Figure 2This is a schematic diagram showing the internal structure of the device with the outer shell partially cut off, including the tank body 01, the tank cover 02, the support frame 03 for supporting the tank body 01, the wiring harness channel 04 for inserting endotracheal tubes and electrical conduits located at the center of the tank cover and connected to the tank body, the breathing channel 05 for air exchange located at the center of the tank cover and connected to the tank body, the central annular column 06 located at the center of the bottom surface of the tank body and extending upwards to near the tank cover, the discharge port 07 located on the bottom surface of the tank body and connecting to the outside, and the manhole 08 located on the tank cover 02. The mounting part is a circular tube, which is tightly and rotatably fitted around the outer periphery of the central annular column 06. The working part is a plate with multiple drainage windows 11, with at least two of the plate extending from one side of the circular tube towards the side wall of the tank body. The stirring tool 10 is equipped with a transmission mechanism 20 located above it. During operation, the koji and brine are introduced into the tank through the manhole 08. The tank body (01) is kept at a constant temperature for fermentation. During the fermentation process, the transmission mechanism 20 drives the stirring tool 10 to stir in a timely manner. Specifically, the transmission mechanism 20 fixes one stirring tool 10 and drives the other stirring tool 10 to rotate. In this way, the fermentation mixture flows out from each window of the stirring tool 10. The fermentation mixture flowing out from the upper and lower windows re-converges on the outflowing side. Due to the distribution of the window positions in the stirring tool 10, the purpose of mixing is achieved by turning the upper and lower parts evenly. Alternatively, the two stirring tools 10 can rotate relative to each other, achieving the same effect and purpose, but with a faster mixing speed.

[0038] To further improve the mixing effect of top-to-bottom folding, see... Figure 2 and Figure 5 The fermentation apparatus includes two stirring tools 10, further designed as follows: each stirring tool 10 has multiple rows of drainage windows 11 arranged vertically and horizontally, with the drainage windows 11 of the two stirring tools 10 being staggered in height. Hinged doors 12 are installed on the drainage windows 11, each door 12 being slightly smaller than the drainage window 11 and hinged at the top or bottom of its surface to the drainage window 11. The drainage window 11 opens naturally due to resistance during operation. This hinged position ensures that when the door 12 is opened at a small angle away from the hinge, its upper edge touches the upper edge of the drainage window 11 (see...). Figure 4This is because the window 12 is located at the far edge and rotates towards the discharge window 11. When the window 12 opens to the other side, it will not be affected by interference. Thus, when the stirring tool 10 rotates in different directions, the opening angle of the window 12 is different, and the flow rate of the contents under resistance is also different. Under this setting, when the two stirring tools 10 rotate in opposite directions at the same time, the contents of the tank can be mixed in at least two modes. That is, when the plates of the two stirring tools 10 are close to each other, the contents are squeezed and discharged from each window. Depending on the size of the window opening, there are large flow discharge mixing and small flow discharge mixing in different directions. If the hinge position of the window 12 in one of the stirring tools 10 is changed, mixing with different flow rates can be obtained. The significant difference between this mixing method and the previous stirring method is that the stirring method requires a large number of rotations and a certain high speed. This method achieves the purpose of remixing by squeezing the contents at different levels and making them flow into one place through various windows. It no longer actively beats the contents. Therefore, it has the advantages of slow speed, low energy consumption and less damage to whole beans.

[0039] To add more mixing methods and further improve the mixing effect, please refer to all appendices. Figure 1-10 Each window is designed with a concave arc surface 13 along its thickness direction. Each window has an airbag 14, which can be inflated to the same or slightly larger curvature as the arc surface 13, bonded together by heat pressing. The airbags are integrated with the panel, creating a seamless seal that allows liquid entry. An installation piece 15 is fixedly installed on each of the two end faces of the two stirring tools 10 at their highest positions. An air control valve 16, capable of individually controlling the air pressure of each airbag in each stirring tool, is fixedly installed on the upper surface of each installation piece 15. An independent air passage (not shown in the figure) is located inside the stirring tool panel, with one end connected to an airbag and the other end leading to near the bottom of the air control valve and connected to the air control valve via an air pipe. The airbags are controlled by the air control valve 16. Whether or not gas is injected can control whether each window opens when rotated. This allows for convenient combinations of various mixing methods. It should be noted that when switching between different mixing methods, the window hinged on the upper layer can return to its initial position under its own weight when the contents are in a normal consistency. In fact, it only needs to return to near the initial position because the cooperation between the airbag and the curved surface 13 has a guiding and resetting function at the moment of gas injection. For the window hinged on the lower layer, a top-pressure resetting component 17 needs to be installed at the hinge to push the window back to a near-closed position when resetting is required. A retractable protective sleeve is provided on the outer surface of the top-pressure resetting component to prevent liquid from entering it. The structure of the top-pressure resetting component is described below. Figure 7-8 ;

[0040] Furthermore, in order to allow for different mixing methods even when the bean paste content is close to the finished product, i.e., when its consistency is very high, a lifting mechanism 30 is needed to raise the two stirring tools to overcome resistance. Otherwise, the thrust of the top-pressing reset component may not be sufficient for reset, and the aforementioned window that relies on its own weight for reset will also be unable to reset quickly due to this resistance. After the two stirring tools are raised to a height above the surface of the bean paste content, they can be reset in the aforementioned manner. Then, the corresponding window is locked with an airbag, and the two stirring tools are lowered to the working position. Rotation can then be activated to allow the bean paste to flow out through the unlocked window for mixing. See also... Figure 2-4 The lifting mechanism 30 includes a lifting seat 31 located above the mixing tool 10 and tightly fitted around the outer periphery of the central annular column 06; a traction component 32 located inside the central annular column 06 that lifts the lifting seat 31 via a rope; a connecting component 33 fixedly mounted on the lifting seat 31 that can connect or disconnect from the mixing tool 10; and a locking component 34 that can lock the lifting seat 31 in a set position; and a drain window 11.

[0041] Structural reference of lifting seat 31 Figure 3 It includes a fitting ring 311 located at the upper part, a transmission mounting ring 312 located at the lower part, and a motor mounting part 313 extending outward from the transmission mounting ring 312;

[0042] The traction assembly 32 includes a rope winch (not shown in the figure), a lifting unlocking ring 321 that fits between the fitting ring 311 and the transmission mounting ring 312 and has vertical space for movement, and a rope roller assembly 322 that is fixedly connected to the drum of the winch at one end and fixedly connected to the lifting unlocking ring 321 at the other end.

[0043] The connecting assembly 33 includes a cylinder 331 fixed to the outer periphery of the motor mounting part 313, a connector 332 mounted on the telescopic rod of the cylinder 331, and a waist hole 333 made in the mounting part 15 of the lower stirring tool 10 among the two stirring tools 10. When the connection is made, the telescopic rod of the cylinder 331 extends, the position of the connector 332 is aligned with the height of the waist hole 333, the stirring tool 10 with the waist hole 333 rotates to fit the waist hole into the connector 332, and then can be lifted upward. The stirring tool 10 drives the other stirring tool 10 and other components such as the lifting seat 31 located above to be lifted upward together.

[0044] Locking assembly 34 includes a toothed band 341 vertically and embeddedly fixed on the outer circumferential surface of the upper portion of the central annular post 06, an elastic locking pin 342 that abuts against or moves away from the toothed band 341 to form a locking or disengaging action, and a locking pin mounting portion 343 provided on the fitting ring 311 for mounting the elastic locking pin 342; the structure of the elastic locking pin 342 is as follows Figure 9The locking component 34 is designed to automatically unlock during lifting and lock when stationary. To achieve unlocking, a slanted guide groove 2a is provided in the middle section of the elastic locking pin 342, with the slant direction away from the head of the elastic locking pin 342, and referenced... Figure 10 A bevel 2b is machined on the upward-facing edge of the lifting unlock ring 321. When the lifting unlock ring 321 is lifted, the bevel 2b enters the inclined guide groove 2a. Under the contact of the two, the elastic locking pin 342 is guided backward by the bevel of the inclined guide groove 2a, and its head disengages from the toothed belt 341, so that the lifting seat 31 can be lifted.

[0045] The transmission mechanism 20 includes an internal gear ring 21 and an external gear ring 22 rotatably mounted in the lifting seat 31, a first motor 23 that provides power to the internal gear ring 21, and a second motor 24 that provides power to the external gear ring 22. The lower parts of the internal gear ring 21 and the external gear ring 22 also have continuous teeth. One of the two mounting members 15 has a first single tooth 25 that meshes with the corresponding position of the internal gear ring 21, and the other has a second single tooth 26 that meshes with the corresponding position of the external gear ring 22. Thus, the first motor 23 and the second motor 24 can control the two stirring tools 10 independently, and the transmission connection with the stirring tools 10 is not restricted, which is highly flexible.

[0046] It should be noted that in this embodiment, all wire harnesses and tubes extend from the wire harness channel 04 and are connected to the outside. Since the two stirring tools 10 have independent power sources, they can rotate simultaneously in the same direction or in opposite directions. The effect of rotating simultaneously in the same direction is like a stirring paddle. Alternatively, one stirring tool 10 can stir at different heights.

[0047] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A soybean paste fermentation device, comprising a tank body (01), a tank lid (02), a support frame (03) for supporting the tank body (01), a wiring harness channel (04) for inserting air pipes and electrical conduits, disposed at the center of the tank lid and communicating with the tank body, a breathing channel (05) disposed at the center of the tank lid and communicating with the tank body, a discharge port (07) disposed on the bottom surface of the tank body and communicating with the outside, and a manhole (08) disposed on the tank lid (02), characterized in that, Also includes: A central annular column (06) is fixedly installed at the center of the bottom surface of the tank and extends upward to near the center of the tank cover. Two stirring tools (10) are provided. The mounting part of each stirring tool (10) is a round tube, which is tightly and rotatably fitted around the outer periphery of the central annular column (06). The working part of each stirring tool (10) is a plate with multiple drainage windows (11), which extends from one side of the round tube toward the side wall of the tank. The drainage windows (11) of each stirring tool (10) are arranged in multiple rows and columns, and the height of each row of drainage windows (11) of the two stirring tools (10) is staggered. Hinged windows (12) are provided on the drainage windows (11). The size of each window (12) is smaller than that of the drainage window (11). The upper edge of the plate of the window (12) is rotatably hinged to the upper end of the side wall of the drainage window (11) through a hinge, or the lower edge of the plate of the window (12) is rotatably hinged to the lower end of the side wall of the drainage window (11) through a hinge. A transmission mechanism (20) is provided above the stirring tool (10), which drives one of the stirring tools (10) to be fixed and the other stirring tool (10) to rotate, or drives the two stirring tools (10) to rotate relative to each other; During operation, the starter culture and brine are introduced into the tank through the manhole (08). The tank body (01) is kept at a constant temperature to allow fermentation. During the fermentation process, the transmission mechanism (20) drives the stirring tool (10) to stir in a timely manner. The fermentation mixture flows out from each of the drain windows (11) of the stirring tool (10). The fermentation mixture flowing out from the upper and lower windows re-merges on the outflow side to form a top-to-bottom mixing.

2. The fermentation apparatus according to claim 1, characterized in that, Each window is designed with a concave arc surface (13) along its thickness direction. Each window is designed with an airbag (14) that can be inflated to the same curvature as the arc surface (13) by hot pressing. An installation piece (15) is fixedly installed on each of the two end faces of the two stirring tools (10) at the highest position after installation. An air control valve (16) that can individually control the air pressure of each airbag in each stirring tool is fixedly installed on the upper surface of each installation piece (15). An independent air passage is set inside the stirring tool plate, with one end connected to an airbag and the other end connected to the bottom of the air control valve and connected to the air control valve through an air pipe. A top pressure reset piece (17) is set at the hinge. A retractable protective sleeve is set on the outer surface of the top pressure reset piece.

3. The fermentation apparatus according to claim 1, characterized in that, The fermentation device also includes a lifting mechanism (30), which includes a lifting seat (31) located above the stirring tool (10) and tightly fitted around the outer periphery of the central annular column (06), a traction component (32) located inside the central annular column (06) and lifted by traction of the lifting seat (31) by a rope, a connection component (33) fixedly installed on the lifting seat (31) and capable of connecting or separating from the stirring tool (10), and a locking component (34) capable of locking the lifting seat (31) in a set position.

4. The fermentation apparatus according to claim 3, characterized in that, The lifting seat (31) includes a fitting ring (311) located at the upper part, a transmission mounting ring (312) located at the lower part, and a motor mounting part (313) extending outward from the transmission mounting ring (312).

5. The fermentation apparatus according to claim 4, characterized in that, The traction assembly (32) includes a rope winch, a lifting unlocking ring (321) fitted between the fitting ring (311) and the transmission mounting ring (312) and having vertical space for movement, and a rope roller assembly (322) with one end fixedly connected to the winch's drum and the other end fixedly connected to the lifting unlocking ring (321).

6. The fermentation apparatus according to claim 4, characterized in that, The connecting assembly (33) includes a cylinder (331) fixed to the outer periphery of the motor mounting part (313), a connector (332) mounted on the telescopic rod of the cylinder (331), and a waist hole (333) made in the mounting part (15) of the stirring tool (10) below the mounting part in the two stirring tools (10).

7. The fermentation apparatus according to claim 4, characterized in that, The locking assembly (34) includes a toothed band (341) that is vertically and embeddedly fixed on the outer peripheral surface of the upper part of the central annular post (06), an elastic locking pin (342) that abuts against or moves away from the toothed band (341) to form a locking or separation, and a locking pin mounting part (343) provided on the fitting ring (311) for mounting the elastic locking pin (342).

8. The fermentation apparatus according to claim 7, characterized in that, The middle section of the elastic locking pin (342) is provided with a slanted guide groove (2a), with the slant direction being away from the head of the elastic locking pin (342). A slanted surface (2b) is machined on the entire circumferential surface of the upward-facing edge of the lifting unlocking ring (321). When the lifting unlocking ring (321) is lifted, the slanted surface (2b) can enter the slanted guide groove (2a). Under the contact between the two, the elastic locking pin (342) is retracted under the guidance of the slanted surface of the slanted guide groove (2a), and the head of the elastic locking pin (342) disengages from the toothed belt (341).

9. The fermentation apparatus according to claim 3, characterized in that, The transmission mechanism (20) includes an internal gear ring (21) and an external gear ring (22) rotatably mounted in the lifting seat (31), a first motor (23) that provides power to the internal gear ring (21), and a second motor (24) that provides power to the external gear ring (22); both the internal gear ring (21) and the external gear ring (22) have continuous teeth below them, and one of the two mounting parts (15) is provided with a first single tooth (25) meshing with the corresponding position of the internal gear ring (21), and the other is provided with a second single tooth (26) meshing with the corresponding position of the external gear ring (22).

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