Submerged fermentation tank

Abstract

A submerged fermentation tank comprises a tank body, and an opening is formed in the upper end of the tank body. The multiple containing pieces are arranged in the tank body in the vertical direction, vegetables are placed in the containing pieces, the problem that the vegetables float in the fermentation process is avoided, after the vegetables are fermented, the vegetables can be conveniently lifted out of the tank body through a travelling crane and the like, and therefore the vegetables can be conveniently fished out in the fermentation process, and the fermented vegetables can be rapidly transferred and packaged. A plurality of detachably-arranged limiting mechanisms are arranged in the tank body, a plurality of clamping pieces are arranged on the limiting mechanisms in the vertical direction, the clamping pieces are used for the upper ends of the containing pieces to limit the containing pieces, and when fermentation water is injected into the tank body, the containing pieces and vegetables move upwards due to buoyancy and the like, so that the vegetables are prevented from entering the tank body. And by arranging the clamping piece, the containing piece can be limited, so that the containing piece is prevented from floating. In addition, in order to conveniently take out the containing piece, the limiting mechanism is detachably arranged on the tank body.

Description

Technical Field

[0001] The present invention relates to the technical field of microbial fermentation, in particular to a deep fermentation tank. Background Art

[0002] Submerged fermentation utilizes microorganisms to ferment vegetables and other foods. Common methods involve placing vegetables and fermentation water containing microbial flora in underground pits for fermentation. Current pits are known to be inconvenient for timely control of the fermentation water, resulting in difficulty controlling fermentation quality, difficulty in removing the vegetables after fermentation, and difficulty controlling the fermentation environment. Alternatively, fermentation tanks are used for fermentation. These fermentation devices, while offering significant advantages in controlling fermentation quality, have a lower single-time fermentation volume than existing pits. While these tanks offer significant advantages in controlling fermentation quality, their high cost significantly limits their market adoption. Furthermore, to increase fermentation capacity, these tanks are typically taller. This increased height causes the vegetables within to float upward due to buoyancy, which reduces the amount of fermented vegetables per batch. While larger quantities of vegetables can be added for fermentation, this decreases the amount of fermentation water, which directly impacts fermentation quality. Furthermore, removing the vegetables after fermentation is difficult due to the height of the tanks, making it difficult to remove the kimchi. Summary of the Invention

[0003] The present invention provides a deep fermentation tank to address the deficiencies of the prior art, solving the problem that vegetables easily float and affect the fermentation quality when using tank fermentation, and secondly solving the problem that it is inconvenient to take out vegetables when using tank fermentation, and has strong practicality.

[0004] In order to achieve the purpose of the present invention, the following technologies are proposed: The invention relates to a deep fermentation tank, comprising a tank body, an upper end of which is open and a tank cover is provided on the upper end of the tank body, so as to prevent foreign matter and impurities from entering during the fermentation process, thereby ensuring a good fermentation environment for vegetable fermentation.

[0005] There are multiple holding parts arranged vertically inside the tank body. Vegetables are placed in the holding parts to avoid the problem of vegetables floating during fermentation. After the fermentation of vegetables is completed, it is convenient to lift the vegetables out of the tank body by a crane, which is conducive to the scooping of vegetables during fermentation and the rapid transfer and packaging of fermented vegetables.

[0006] The tank is equipped with multiple detachable stoppers, each with a plurality of vertically positioned clips. These clips are used to hold the upper end of the container in place. When fermented water is injected into the tank, the container and vegetables move upward due to buoyancy, and the clips prevent them from floating. Furthermore, to facilitate removal of the container, the stoppers are detachably mounted on the tank.

[0007] Furthermore, the bottom of the tank body is connected to a drain valve, the middle of the tank body is connected to a middle valve, and the upper end of the tank body is connected to an upper valve. During the fermentation process, the drain valve, the middle valve and the upper valve can be opened to facilitate sampling and analysis of fermentation water at different depths, and the fermentation water can be adjusted or a circulation operation can be started based on the analysis results to facilitate the control of the quality of vegetable fermentation.

[0008] The bottom of the tank body is connected to a circulation valve, the outer end of the circulation valve is connected to a circulation pump, the circulation pump is connected to a circulation pipe, the circulation pipe is a hose, or part of it is a hose, the other end of the circulation pipe is provided with a liquid inlet valve, the other end of the liquid inlet valve is connected to a nozzle, the nozzle is provided on the tank cover, the fermentation water can be circulated by the circulation pump, and the pH value of the fermentation water, the content of the fermentation bacteria, etc. can be controlled through the corresponding mixing system during the circulation process, ultimately achieving the purpose of improving the quality of kimchi.

[0009] Furthermore, an outer convex edge is provided on the outer periphery of the upper end of the can body, the cross section of the can lid is a concave structure, and a cover edge is formed on the outer periphery of the upper end of the can lid. When the can lid is placed on the can body, the bottom of the can lid extends into the interior of the can body, and a sealing ring is provided on the upper wall of the outer convex edge. The lower wall of the cover edge acts on the upper wall of the sealing ring. The can lid is connected to multiple exhaust valves. During the fermentation process, gas is generated due to the reproduction of microorganisms. If these gases are not discharged in time, it will affect the sealing effect between the can body and the can lid. Secondly, due to the reduction of the sealing effect between the can body and the can lid, external air will enter, thereby affecting the fermentation quality of the kimchi. Therefore, a corresponding exhaust valve is provided. The provision of the sealing ring can improve the sealing effect between the can body and the can lid, and the sealing ring is made of rubber.

[0010] Furthermore, a plurality of fasteners are provided at the upper end of the outer periphery of the can body, and the upper ends of the fasteners act on the upper wall of the edge of the cover to fix the can cover, thereby improving the fixing effect between the can body and the can cover through the fasteners.

[0011] Furthermore, the fastener includes a hinged seat welded to the upper end of the outer periphery of the tank body, a slot is formed at the outer end of the hinged seat, a groove is formed in the outer end of the hinged seat, a rotating rod is rotatably provided in the slot, an L-shaped rod is welded to the rotating rod, a threaded sleeve is welded to the other end of the L-shaped rod, a fastening screw is threadedly connected to the threaded sleeve, a holding ring is welded to the upper end of the fastening screw, a fastening plate is fixed to the lower end of the fastening screw via a pin, and the lower end of the fastening plate acts on the upper wall of the lid edge. When the tank lid is fixed by the fastener, the upper end of the L-shaped rod is horizontal, while the other sections are inclined. The fastener facilitates the fixing operation of the tank lid and is convenient to operate.

[0012] Furthermore, the inner ends of the sewage valve and the circulation valve are respectively provided with filter covers, and the filter covers have filter nets. The setting of the filter covers can prevent impurities in the fermentation water from being discharged, thereby avoiding problems such as pipeline blockage or increased load on the circulation pump.

[0013] Furthermore, the holding member includes an upper ring, on which a holding bag is provided. The holding bag can be a cloth bag, a woven bag, etc., which is used to hold vegetables and facilitates the lifting operation of the fermented vegetables.

[0014] A floating plate cover is provided on the upper ring, and a plurality of leakage holes are opened on the floating plate cover. The floating plate cover can prevent the vegetables from floating out of the container due to buoyancy, and the setting of the leakage holes facilitates the circulation of fermentation water.

[0015] Furthermore, a plurality of retaining plates are formed on the outer circumference of the floating plate cover, and an annular groove is formed on the inner circumference of the upper ring. The inner circumference of the upper ring is also formed with a plurality of notches, which are connected to the annular groove, and the retaining plates are retained in the annular groove. The annular groove and retaining plates facilitate the fixing of the floating plate cover to the upper ring, preventing the floating plate cover from falling or changing its position due to buoyancy or improper placement. Such problems would cause the floating plate cover to lose its ability to prevent vegetables from floating upwards and thus enter the interior of the can.

[0016] Furthermore, the limiting mechanism includes multiple connecting rods fixed to the bottom of the tank body. A limiting ring is welded to the upper end of the connecting rods, located on the upper side of the bottom of the tank body. A clamping rod is welded to the upper end of the connecting rods, with the axial direction of the clamping rod parallel to the horizontal direction. A cannula is inserted into the upper end of the connecting rod, and a pair of inverted L-shaped connecting grooves are formed at the lower end of the cannula in an axially symmetrical manner. The clamping rod is inserted into the horizontal section of the connecting groove. The clamping rod and connecting groove facilitate the connection of the cannula, requiring only insertion and rotation to achieve connection. Furthermore, the connection is highly stable.

[0017] Furthermore, the clamp is rotatably mounted on the insert tube via a rotating shaft, and a control member for controlling its rotation is connected to the clamp. When the container is placed downward, the rotatably mounted clamp avoids affecting the movement of the container. Secondly, the control member can also be controlled to limit the upper end of the container to prevent the container from floating upward due to buoyancy.

[0018] The advantages of the above technical solution are: Compared with the fermentation tank used in the prior art, the present invention can perform operations such as mixing of fermentation water in real time through the circulation and sampling analysis of fermentation water, thereby improving the fermentation quality of kimchi.

[0019] Compared with the prior art, the present invention facilitates the removal of pickled vegetables after fermentation and greatly reduces the content of solid impurities such as vegetables in the fermentation water, thereby creating convenience for the circulation of the fermentation water. Secondly, the pickled vegetables can be quickly removed.

[0020] Compared with the prior art, the present invention can prevent vegetables from floating, thereby improving the quality of vegetables after deep fermentation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0022] Figure 1 Shown is a three-dimensional structural diagram of a submerged fermenter.

[0023] Figure 2 Shows a cross-sectional structural diagram of a submerged fermenter.

[0024] Figure 3 Shows a three-dimensional structural diagram of the fastener.

[0025] Figure 4 Shows a three-dimensional structural diagram of the interior of the tank.

[0026] Figure 5 A three-dimensional structural diagram of the container is shown.

[0027] Figure 6 A three-dimensional structural diagram of a floating cover is shown.

[0028] Figure 7 A three-dimensional structural diagram of the connecting rod is shown.

[0029] Figure 8 A three-dimensional structural diagram of the cannula is shown.

[0030] Figure 9 A three-dimensional structural diagram of the limiting mechanism is shown.

[0031] Figure 10 Shows a cross-sectional structural diagram of the limiting mechanism. DETAILED DESCRIPTION

[0032] like Figure 1 and Figure 2 As shown, a deep fermentation tank includes a tank body 1, the upper end of the tank body 1 is open, the upper end of the tank body 1 is provided with a tank cover 3, a plurality of holding parts 6 are arranged vertically inside the tank body 1, a plurality of detachable limiting mechanisms 7 are provided inside the tank body 1, and a plurality of clamping parts 770 are provided on the limiting mechanism 7 along the vertical direction. The clamping part 770 is used for the upper end of the holding part 6 to limit the holding part 6.

[0033] The bottom of the tank body 1 is connected to a drain valve 13, the middle of the tank body 1 is connected to a middle valve 11, the upper end of the tank body 1 is connected to an upper valve 10, the bottom of the tank body 1 is connected to a circulation valve 15, the outer end of the circulation valve 15 is connected to a circulation pump 16, the circulation pump 16 is connected to a circulation pipe 17, the other end of the circulation pipe 17 is provided with a liquid inlet valve 171, the other end of the liquid inlet valve 171 is connected to a nozzle 18, and the nozzle 18 is provided on the tank cover 3.

[0034] During the implementation of this embodiment, the operator first cleans the vegetables to be fermented, drains the cleaning water, and then places the vegetables into each container 6. At the same time, the operator connects the limiting mechanism 7 to the bottom of the tank body 1. Afterwards, the container 6 containing the vegetables is placed in the tank body 1 using a device with a lifting function, such as a crane, so that each container 6 is located below each set of clamps 770. Thereafter, the tank cover 3 is placed on the upper end of the tank body 1. After the upper end of the tank body 1 is closed, if fermentation is to be carried out, the prepared fermentation liquid is sprayed into the interior of the tank body 1 through the circulation pump 16. Compared with the direct injection of fermentation water, this spraying method can avoid affecting the integrity of the vegetables and also ensure the uniformity of the various substances in the fermentation liquid. The vegetable fermentation process then proceeds. During the fermentation process, the operator samples the fermented water through the drain valve 13, the middle valve 11, the upper valve 10, and other devices. The samples measure and analyze the pH, salinity, bacterial count, bacterial species, and temperature of the fermented liquid. If any of the above characteristics of the fermented liquid change significantly, the circulating pump 16 is activated to circulate the fermented liquid, and the fermented liquid is adjusted during circulation. To facilitate adjustment, a temporary storage tank can be connected to the circulating pump 16, both to facilitate initial preparation of the fermented liquid and to facilitate adjustment during circulation. When the vegetable fermentation is complete, the fermented liquid is discharged via the circulating pump 16. The tank lid 3 is then opened, the limiting mechanism 7 is removed, and the tank is withdrawn from the tank body 1. The container 6 is then sequentially lifted out of the tank body 1 using a crane or other device. This completes the fermentation process for a batch of vegetables.

[0035] In some embodiments, the upper end of the tank body 1 is provided with an outwardly protruding rim 19, the tank cover 3 is concave in cross section, and the upper end of the tank cover 3 is formed with a cover rim 31. When the tank cover 3 is placed on the tank body 1, the bottom of the tank cover 3 extends into the interior of the tank body 1, and the upper wall of the outwardly protruding rim 19 is provided with a sealing ring 4. The lower wall of the cover rim 31 acts on the upper wall of the sealing ring 4, and the tank cover 3 is provided with a plurality of exhaust valves 30.

[0036] In the present embodiment, in order to avoid the interior of the tank body 1 being connected to the external environment during fermentation, so that foreign bacteria and the like in the external environment enter the tank body 1, thereby affecting the fermentation quality, the sealing ring 4 is provided. In addition, the exhaust valves 30 are provided to facilitate the discharge of waste gas generated during fermentation, so as to prevent the internal pressure of the tank body 1 from increasing due to the discharge of gas during fermentation, thereby reducing the sealing effect between the tank body 1 and the tank cover 3, or causing a safety accident.

[0037] As shown in Figure 3 In some embodiments, the upper end of the tank body 1 is provided with a plurality of fastening members 5, and the upper end of the fastening member 5 acts on the upper wall of the cover rim 31 to fix the tank cover 3. Specifically, the fastening member 5 provided in the present embodiment includes a hinge seat 50 welded to the upper end of the outer periphery of the tank body 1. The outer side end of the hinge seat 50 is provided with a clamping groove 51, and the outer side end of the hinge seat 50 is openingly formed with a recess 52. A rotating rod 53 is rotatably arranged in the clamping groove 51. An L-shaped rod 54 is welded to the rotating rod 53. A wire sleeve 55 is welded to the other end of the L-shaped rod 54. A fastening screw rod 56 is threadedly connected in the wire sleeve 55. A holding ring 57 is welded to the upper end of the fastening screw rod 56. A fastening plate 58 is fixed to the lower end of the fastening screw rod 56 by a pin. The lower end of the fastening plate 58 acts on the upper wall of the cover rim 31.

[0038] When the fastening member 5 provided in the present embodiment is used to fix the tank cover 3 and the tank body 1, the operator first rotates the L-shaped rod 54 upwardly so that the fastening plate 58 is located above the tank cover 3. Then, a crowbar or the like is inserted into the holding ring 57 to rotate the fastening screw rod 56 by means of the crowbar. The tank cover 3 is fixed and sealed above the tank body 1 by rotation.

[0039] In some embodiments, the pollution discharge valve 13 and the inner side end of the circulation valve 15 are respectively provided with a filter cover 14. The filter cover 14 is provided with a filter screen. The outer shape of the filter screen is optionally in a conical structure, i.e. the filter cover 14 is in a funnel structure, and a plurality of holes are formed in the conical wall of the filter cover 14. The filter screen is pasted or bound to the filter cover 14. In this way, the problem of excessive accumulation of impurities causing the flux of fermentation water to decrease can be avoided.

[0040] As shown in Figures 4 to 6As shown, in some embodiments, the containing member 6 includes an upper ring 60 , a containing bag 66 is provided on the upper ring 60 , a floating plate cover 67 is provided on the upper ring 60 , and a plurality of leakage holes 670 are opened on the floating plate cover 67 .

[0041] In the second embodiment, due to the problem of deformation of the containing bag 66 caused by buoyancy, multiple inclined rods 64 can be fixed or welded on the upper ring 60, and the lower ends of the inclined rods 64 extend inwardly, and the lower ends of the inclined rods 64 are fixed or welded with a lower ring 65. In this way, the upper ring 60, the inclined rods 64 and the lower ring 65 are used as an internal support skeleton to prevent the containing bag 66 from being deformed. Of course, since the introduction of the lower ring 65 and the inclined rods 64 will increase the weight of the containing part 6, the upper ring 60, the inclined rods 64 and the lower ring 65 used can be hollow stainless steel pipes, or high-strength plastics.

[0042] In the third embodiment, to facilitate the connection between the container 6 and the crane, multiple hooks 61 made of high-strength material can be welded or fixed to the upper ring 60. These hooks 61 can be ring-shaped, U-shaped, L-shaped, or other convenient connection structures. If the hooks 61 are not provided, a cloth hanging ring can also be provided at the upper end of the container bag 66. Of course, this method is inconvenient to lift and connect, but it can significantly reduce the weight of the container 6. Based on this, those skilled in the art can select an appropriate structure according to their own needs in specific operations and applications.

[0043] In some embodiments, a plurality of latching plates 671 are formed on the outer periphery of the floating plate cover 67, an annular groove 62 is opened on the inner periphery of the upper ring 60, and a plurality of notches 63 are opened on the inner periphery of the upper ring 60. The notches 63 are connected to the annular groove 62, and the latching plates 671 are latched in the annular groove 62.

[0044] In the second embodiment, a limiting clamp having an L-shaped structure or similar shape may also be welded on the upper ring 60 to limit the floating plate cover 67 described in the above embodiment.

[0045] In the third embodiment, the floating plate cover 67 may also be directly fixed by screw connection.

[0046] In the fourth embodiment, the floating plate cover 67 may also be limited by providing a limiting clamp having a rotatable L-shaped structure or similar shape on the upper ring 60 .

[0047] The structural members provided in the above embodiment can limit the position of the floating plate cover 67 to prevent the floating plate cover 67 from floating after the fermentation water is injected.

[0048] like Figures 7 to 10As shown, in some embodiments, the limiting mechanism 7 includes multiple connecting rods 70 fixed to the bottom of the tank body 1. The upper ends of the connecting rods 70 are welded with limiting rings 71, which are located on the upper side of the bottom of the tank body 1. The upper ends of the connecting rods 70 are welded with clamping rods 73, and the axial direction of the clamping rods 73 is parallel to the horizontal direction. The upper ends of the connecting rods 70 are inserted with insertion tubes 74, and the lower ends of the insertion tubes 74 are axially symmetrically formed with a pair of inverted L-shaped connecting grooves 740. The clamping rods 73 are inserted into the horizontal sections of the connecting grooves 740.

[0049] In some embodiments, in order to facilitate the precise placement of the cannula 74 on the connecting rod 70, a restraint ring 790 can be installed at the upper end of the interior of the tank body 1 through a screw 79 or a fixed connecting rod 79, and a notch 791 is provided on the restraint ring 790. The restraint ring 790 allows the operator to precisely insert the cannula 74 onto the connecting rod 70. In addition, the restraint ring 790 can also restrain and limit the upper end of the cannula 74 to avoid problems such as tilting.

[0050] In some embodiments, to further enhance the position restriction of the upper end of the cannula 74, a protrusion 76 is provided at the upper end of the cannula 74. The outer structure of the protrusion 76 only needs to be able to move through the notch 791. When the cannula 74 is connected, the upper end of the protrusion 76 acts on the restraint ring 790, thereby achieving the purpose of restricting the upper end of the cannula 74. Optionally, a spring can be fixed to the lower end of the cannula 74 by a pin or the like. When the cannula 74 is connected, the lower end of the spring acts on the upper end of the connecting rod 70, thereby compressing the spring. The restoring deformation force provided by the spring acts as a tensioning force to increase the friction force.

[0051] In some embodiments, the card 770 is rotatably arranged on the insert tube 74 via a rotating shaft, and a control member for controlling its rotation is connected to the card 770, which can be a torsion spring, and a stop pin is also required to be provided on the insert tube 74, and the rotation direction and rotation angle of the card 770 can be controlled by the stop pin, that is, when the container 6 is placed, the card 770 can be rotated downward, and when the placement is completed, the card 770 is rotated upward under the control of the torsion spring, and rotated into an inclined posture. At this time, the other end of the stop pin is limited by the stop pin and will not continue to tilt upward, thus ensuring the limiting effect of the card 770.

[0052] In some embodiments, the clamp 770 is rotatably mounted on the insert tube 74 via a rotating shaft. The clamp 770 is connected to a control member for controlling its rotation. The control member is a weight block added to the outer end of the clamp 770 and is set on the outer end of the clamp 770. At this time, the rotating shaft is set in the middle position of the clamp 770 or other suitable positions. With this design, when the container 6 is placed downward, the outer end of the clamp 770 can be tilted upward, while the inner end is rotated downward. Of course, a stop pin is also needed at this time to prevent the outer end of the clamp 770 from rotating to the inside. After the container 6 is placed, the clamp 770 moves upward under the action of the weight block, thereby limiting the container 6.

[0053] In some embodiments, the clamp 770 is rotatably mounted on the cannula 74 via a protrusion 77, the protrusion 77 is welded to the cannula 74, and the clamp 770 faces the notch 63 mentioned above. A control member for controlling its rotation is connected to the clamp 770, and the control member may also be a Figure 9 and Figure 10The control member includes a plurality of push-pull plates 772 horizontally inserted into the insert tube 74, one end of the push-pull plate 772 extends into the insert tube 74, and the other end of the push-pull plate 772 extends out of the insert tube 74, and a push pin 773 is provided on the extended end of the push-pull plate 772, a waist-shaped hole 771 is provided on the clamping member 770 along its length, and the push pin 773 is passed through the waist-shaped hole 771, and an oblique hole 774 is provided on the inner side end of the push-pull plate 772, and a movable inner column 777 is passed through the insert tube 74, and a movement opening 777 is provided on the movable inner column 777 along its length, and the push-pull plate 772 is passed through the movement opening 777, and the width of the push-pull plate 772 is smaller than the movement opening 77 7, and secondly, an inner rod 775 for acting on the oblique hole 774 is passed through the moving mouth 777, and both ends of the inner rod 775 are passed through the movable inner column 777, and the upper end of the movable inner column 777 is connected by a thread or welded with an end pull rod 778, and the movable inner column 777 can be pulled to move along its axial direction by the end pull rod 778, and the upper end of the cannula 74 is welded or connected by a thread with an end fixing sleeve 779, and the end pull rod 778 is passed through the end fixing sleeve 779, and in order to perform the pulling and pulling operation of the end pull rod 778, a ring part 781 can be welded at the end of the end pull rod 778, and the setting of the ring part 781 facilitates the insertion and extraction operation of the cannula 74. When the control member as described above adjusts the rotation angle of the clamping member 770 to lock the height of the receiving member 6 through the clamping member 770, the operator can pull the movable inner column 777 through the end pull rod 778 to move, and when the movable inner column 777 moves, the movable inner column 777 thereon will act on the inclined hole 774, thereby causing the push-pull plate 772 to be pulled and moved. When and only when the push-pull plate 772 moves outward, the push pin 773 thereon will act on the waist-shaped hole 771, thereby causing the inner end of the clamping member 770 to open, thereby causing the clamping member 770 to act on the upper end of the receiving member 6, thereby achieving the limiting operation of the upper end of the receiving member 6. When the receiving member 6 is placed, the clamping member 770 needs to be rotated downward. Optionally, to facilitate locking the state of the movable inner column 777, a retaining spring can be installed on the end pull rod 778, and the inner end of the oblique hole 774 can be tilted upward. Then, when the pull on the end pull rod 778 is released, the retaining spring will act on the movable inner column 777, thereby causing the outer end of the clamp 770 to rotate outward. In addition, the outer periphery of the end pull rod 778 can be provided with a thread, and an end locking ring 780 can be installed on the outer end of the end pull rod 778 through a pin, and the locking ring 780 is located on both the inner and outer sides of the end fixing sleeve 779. Compared with the previous method, the stability can be significantly improved, and the tilt direction of the oblique hole 774 can be selected arbitrarily, and its inner end can face upward or downward.

[0054] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. It is apparent that various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the present invention. Thus, the present invention is intended to encompass such modifications and variations as long as they fall within the scope of the claims and their equivalents.

Claims

1. A submerged fermentation tank, characterized in that: It comprises a tank body (1), the upper end of the tank body (1) is open; The upper end of the tank body (1) is provided with a tank cover (3); A plurality of receiving members (6) are arranged vertically inside the tank body (1); A plurality of detachably arranged limiting mechanisms (7) are provided in the tank body (1). A plurality of clamping members (770) are provided on the limiting mechanisms (7) along the vertical direction. The clamping members (770) are used for the upper end of the containing member (6) to limit the containing member (6).

2. The submerged fermentation tank according to claim 1, wherein The bottom of the tank body (1) is connected to a drain valve (13), the middle of the tank body (1) is connected to a middle valve (11), and the upper end of the tank body (1) is connected to an upper valve (10); The bottom of the tank body (1) is connected to a circulation valve (15), the outer end of the circulation valve (15) is connected to a circulation pump (16), the circulation pump (16) is connected to a circulation pipe (17), the other end of the circulation pipe (17) is provided with a liquid inlet valve (171), the other end of the liquid inlet valve (171) is connected to a nozzle (18), and the nozzle (18) is provided on the tank cover (3).

3. The submerged fermentation tank according to claim 1, wherein The outer periphery of the upper end of the tank body (1) is provided with an outer convex edge (19), the cross section of the tank cover (3) is a concave structure, and the outer periphery of the upper end of the tank cover (3) is formed with a cover edge (31). When the tank cover (3) is placed on the tank body (1), the bottom of the tank cover (3) extends into the interior of the tank body (1), and the upper wall of the outer convex edge (19) is provided with a sealing ring (4), and the lower wall of the cover edge (31) acts on the upper wall of the sealing ring (4); The tank cover (3) is connected to a plurality of exhaust valves (30).

4. The submerged fermentation tank according to claim 1, characterized in that A plurality of fasteners (5) are provided at the upper end of the outer periphery of the tank body (1), and the upper ends of the fasteners (5) act on the upper wall of the cover edge (31) to fix the tank cover (3).

5. The submerged fermentation tank according to claim 4, characterized in that: The fastener (5) includes a hinge seat (50) welded to the upper end of the outer periphery of the tank body (1), a slot (51) is provided at the outer end of the hinge seat (50), a groove (52) is formed in the outer end of the hinge seat (50), a rotating rod (53) is rotatably provided in the slot (51), an L-shaped rod (54) is welded to the rotating rod (53), a wire sleeve (55) is welded to the other end of the L-shaped rod (54), a fastening screw rod (56) is connected to the wire sleeve (55) by a thread, a holding ring (57) is welded to the upper end of the fastening screw rod (56), a fastening plate (58) is fixed to the lower end of the fastening screw rod (56) by a pin, and the lower end of the fastening plate (58) acts on the upper wall of the cover edge (31).

6. The submerged fermentation tank according to claim 2, characterized in that: The inner ends of the sewage valve (13) and the circulation valve (15) are respectively provided with filter covers (14), and the filter covers (14) are provided with filter screens.

7. The submerged fermentation tank according to claim 1, characterized in that The containing member (6) comprises an upper ring (60), and a containing bag (66) is provided on the upper ring (60); A floating plate cover (67) is provided on the upper ring (60), and a plurality of leakage holes (670) are provided on the floating plate cover (67).

8. The submerged fermentation tank according to claim 7, characterized in that: A plurality of convex plates (671) are formed on the outer periphery of the floating plate cover (67); An annular groove (62) is provided on the inner circumference of the upper ring (60), and a plurality of notches (63) are provided on the inner circumference of the upper ring (60). The notches (63) are communicated with the annular groove (62), and the convex plate (671) is clamped in the annular groove (62).

9. The submerged fermentation tank according to claim 1, characterized in that: The limiting mechanism (7) comprises a plurality of connecting rods (70) fixed to the bottom of the tank body (1), a limiting ring (71) is welded to the upper end of the connecting rod (70), the limiting ring (71) is located on the upper side of the bottom of the tank body (1), and a clamping rod (73) is welded to the upper end of the connecting rod (70), and the axial direction of the clamping rod (73) is parallel to the horizontal direction; The upper end of the connecting rod (70) is provided with an insert (74), the lower end of the insert (74) is provided with a pair of connecting grooves (740) in an inverted L-shaped structure in an axisymmetric manner, and the clamping rod (73) is provided through the horizontal section of the connecting groove (740).

10. The submerged fermentation tank according to claim 1, characterized in that: The clamping member (770) is rotatably mounted on the cannula (74) via a rotating shaft, and a control member for controlling the rotation of the clamping member (770) is connected to the clamping member (770).

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