CN220926755U - Air inlet device of fermentation tank - Google Patents

Air inlet device of fermentation tank Download PDF

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Publication number
CN220926755U
CN220926755U CN202322769182.6U CN202322769182U CN220926755U CN 220926755 U CN220926755 U CN 220926755U CN 202322769182 U CN202322769182 U CN 202322769182U CN 220926755 U CN220926755 U CN 220926755U
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China
Prior art keywords
air inlet
air
tank body
screw rod
cavity
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CN202322769182.6U
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Chinese (zh)
Inventor
杨国军
陈振民
陈衍学
刘雄涛
喻凌寒
雍思龙
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Hubei Lutiandi Biological Engineering Co ltd
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Hubei Lutiandi Biological Engineering Co ltd
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Abstract

The utility model relates to an air inlet device of a fermentation tank, and belongs to the technical field of microbial fermentation. The utility model comprises a tank body, an air inlet pipe and a stirring piece. The intake pipe rotates the bottom of installing at the jar body, and the one end of intake pipe is linked together with the external world. One end of stirring piece is installed and is stretched into jar internal one end at the intake pipe, has first cavity in the stirring piece, and first cavity is linked together with the intake pipe, and the other end of stirring piece has the gas outlet, and the intake pipe rotates in order to drive the stirring piece and rotates, and the stirring piece rotates in order to take place axial displacement with relative intake pipe. The utility model effectively solves the technical problems that the dissolved oxygen rate in the fermentation tank is not high and the fermentation level of aerobic bacteria is affected in the prior art.

Description

Air inlet device of fermentation tank
Technical Field
The utility model belongs to the technical field of microbial fermentation, and particularly relates to an air inlet device of a fermentation tank.
Background
Microbial fermentation refers to a process of converting raw materials into products required by human beings through a specific metabolic pathway under proper conditions by utilizing microorganisms, and the fermentation process of the microorganisms has very strict requirements on gas and environment, and aerobic bacteria need to grow and reproduce in an aerobic environment, so that a gas inlet device is required to input gas into a fermentation tank.
In the prior art, when the traditional air inlet device is used for air inlet, the dissolved oxygen rate of air in the fermentation tank is not high, and the fermentation level of aerobic bacteria in the fermentation tank is affected.
Disclosure of utility model
The utility model provides an air inlet device of a fermentation tank, which is used for solving the technical problem of low dissolved oxygen rate of gas in the fermentation tank.
In order to achieve the above purpose, the present utility model is realized by the following technical scheme: an air inlet device of a fermentation tank comprises a tank body, an air inlet pipe and a stirring piece. The intake pipe rotates the bottom of installing at the jar body, and the one end of intake pipe is linked together with the external world. One end of stirring piece is installed and is stretched into jar internal one end at the intake pipe, has first cavity in the stirring piece, and first cavity is linked together with the intake pipe, and the other end of stirring piece has the gas outlet, and the intake pipe rotates in order to drive the stirring piece and rotates, and the stirring piece rotates in order to take place axial displacement with relative intake pipe.
The air inlet device of the fermentation tank provided by the utility model has the beneficial effects that: in the use, air gets into the jar internal through the intake pipe, and the intake pipe is located jar internal one end and the interior first cavity of stirring piece and is linked together. The air is discharged through the air outlet of the stirring piece and is dispersed in the tank body to be fully contacted with the aerobic bacteria. Specifically, one end of the air inlet pipe is communicated with the outside, a first cavity is formed in the stirring piece, the other end of the air inlet pipe is communicated with the stirring piece in the tank body, air enters the tank body through the air inlet pipe, and the air inlet pipe rotates to drive the stirring piece to rotate in the tank body. The stirring piece rotates in the tank body relative to the tank body, and meanwhile, the stirring piece moves along the axial direction of the tank body. In addition, one end of the stirring piece, which is far away from the bottom of the tank body, is provided with an air outlet, the stirring piece moves to drive the air outlet to move in the tank body, and air enters the tank body through the air outlet after entering the first cavity. Thus, through the structure, the air outlet moves along with the stirring piece so that air is dispersed in the tank body, and the stirring piece moves in the tank body to drive the aerobic bacteria to move in the tank body, so that the aerobic bacteria are fully contacted with the air, and the fermentation level of the aerobic bacteria is improved.
Optionally, the stirring piece of the air inlet device of the fermentation tank comprises a sleeve, a screw rod, a spline shaft and stirring blades. One end of the sleeve is arranged at the bottom of the tank body. The screw rod is inserted in the sleeve, one end of the screw rod is communicated with the air inlet pipe, the other end of the screw rod is provided with an air outlet, the first cavity is positioned in the screw rod to be communicated with the air inlet pipe and the air outlet, and the inner wall of the sleeve is provided with threads corresponding to the screw rod. The spline shaft is connected to one end of the air inlet pipe extending into the tank body and inserted into the screw rod, the inner wall of the screw rod is provided with a tooth groove surface meshed with the spline shaft, the air inlet pipe rotates to drive the spline shaft to rotate, the spline shaft rotates to drive the screw rod to rotate and drive the screw rod to axially move, and the spline shaft is internally provided with a hollow cavity, so that the first cavity is communicated with the air inlet pipe. The stirring leaf is installed and is close to the one end of gas outlet at the lead screw, has the second cavity in the stirring leaf, and first cavity is linked together with the second cavity, and it has a plurality of ventholes to open on the stirring leaf, and the lead screw moves in order to drive the stirring leaf motion.
Optionally, the fermenter air intake apparatus further comprises a motor. The motor is located jar body below, and the motor has the output to drive the intake pipe and rotate.
Optionally, the fermenter air inlet apparatus further comprises an air cone. The gas cone is arranged at the gas outlet of the stirring piece and is used for dispersing gas and discharging the dispersed gas into the tank body.
Optionally, the fermenter air intake apparatus further comprises a baffle. The guide plate is arranged in the screw rod and used for dividing the gas in the screw rod.
Optionally, the fermenter air inlet apparatus further comprises a stand. The support is installed below the tank body, the motor is installed on the support, and one end of the air inlet pipe extending out of the tank body is connected with the support in a rotating mode.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of an air intake device for a fermenter according to an embodiment of the present utility model;
FIG. 2 is a schematic view of a stirring part of an air inlet device of a fermenter according to an embodiment of the present utility model;
FIG. 3 is a cross-sectional view of a stirring member of an air inlet device of a fermenter according to an embodiment of the present utility model;
FIG. 4 is a schematic view of a stirring blade of an air inlet device of a fermenter according to an embodiment of the present utility model;
fig. 5 is a top view of fig. 3A of an air intake device of a fermenter according to an embodiment of the present utility model.
In the figure:
1. a tank body; 2. a stirring member; 21. a sleeve; 22. a screw rod; 221. a first cavity; 23. a spline shaft; 24. a deflector; 25. stirring the leaves; 26. an air cone; 3. a bracket; 4. a motor; 41. a driving wheel; 42. driven wheel; 5. and an air inlet pipe.
Detailed Description
Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
Examples
Microbial fermentation refers to a process of converting raw materials into products required by human beings through a specific metabolic pathway under proper conditions by utilizing microorganisms, and the fermentation process of the microorganisms has very strict requirements on gas and environment, and aerobic bacteria need to grow and reproduce in an aerobic environment, so that a gas inlet device is required to input gas into a fermentation tank.
In the prior art, when the traditional air inlet device is used for air inlet, the dissolved oxygen rate of air in the fermentation tank is not high, and the fermentation level of aerobic bacteria in the fermentation tank is affected.
In order to solve the above technical problems, the present embodiment provides a fermenter air intake apparatus, as shown in fig. 1, which may include a tank 1, an air intake pipe 5 and a stirring member 2. The tank body 1 is used for culturing aerobic bacteria. The air inlet pipe 5 is rotatably arranged at the bottom of the tank body 1, the other end of the air inlet pipe 5 is communicated with the outside, and air enters the tank body 1 from the outside through the air inlet pipe 5. One end of the stirring piece 2 is arranged at one end of the air inlet pipe 5 positioned in the tank body 1, and the stirring piece 2 is internally provided with a first cavity 221, and the first cavity 221 is communicated with the air inlet pipe 5. The other end of the stirring member 2 has an air outlet so that air is discharged into the tank 1 through the air inlet pipe 5 into the first cavity 221. In addition, the air inlet pipe 5 axially rotates relative to the tank 1 so as to drive the stirring piece 2 to axially rotate relative to the tank 1. In this embodiment, the stirring member 2 rotates relative to the tank 1 and moves axially relative to the tank 1, and the air outlet moves in the tank 1 along with the stirring member 2, so that air in the first cavity 221 is discharged into the tank 1 through the air outlet and uniformly dispersed in the tank 1, and in addition, the stirring member 2 drives aerobic bacteria to move in the tank 1, so that the aerobic bacteria fully contact with the air, and the fermentation level of the aerobic bacteria is improved.
Through the structure, in the use process, air enters the tank body 1 through the air inlet pipe 5, and one end of the air inlet pipe 5, which is located in the tank body 1, is communicated with the first cavity 221 in the stirring piece 2. The air is discharged through the air outlet of the stirring piece 2 and is dispersed in the tank body 1 to be fully contacted with aerobic bacteria. Specifically, one end of the air inlet pipe 5 is communicated with the outside, a first cavity 221 is formed in the stirring piece 2, the other end of the air inlet pipe 5 is communicated with the stirring piece 2 in the tank body 1, air enters the tank body 1 through the air inlet pipe 5, and the air inlet pipe 5 rotates to drive the stirring piece 2 to rotate in the tank body 1. The stirring member 2 rotates in the tank 1 relative to the tank 1, and the stirring member 2 is displaced in the axial direction of the tank 1. In addition, the air outlet of the end of the stirring piece 2 far away from the bottom of the tank body 1 moves in the tank body 1 along with the stirring piece 2, and air enters the tank body 1 through the air outlet after entering the first cavity 221. Thus, through the structure, the air outlet moves along with the stirring piece 2 so that air is dispersed in the tank body 1, and the stirring piece 2 moves in the tank body 1 to drive aerobic bacteria to move in the tank body 1, so that the aerobic bacteria are fully contacted with the air, and the fermentation level of the aerobic bacteria is improved.
On the basis of the above, referring to fig. 2, a stirring member 2 of an air inlet device of a fermenter may include a sleeve 21, a screw 22, a spline shaft 23 and stirring vanes 25. One end of the sleeve 21 is arranged at the bottom in the tank body 1, and one end of the air inlet pipe 5 extending into the tank body 1 is inserted into the sleeve 21. The screw 22 is inserted into the sleeve 21, and the inner wall of the sleeve 21 has a thread corresponding to the screw 22. Thus, when the sleeve 21 is fixed relative to the can 1, the screw 22 is axially displaced relative to the can 1 while the screw 22 rotates within the sleeve 21. In addition, the screw rod 22 is provided with a first cavity 221, air enters the first cavity 221 after passing through the air inlet pipe 5, and one end of the screw rod 22, which is far away from the bottom of the tank body 1, is provided with an air outlet so as to discharge the air entering the first cavity 221 into the tank body 1. It should be noted that, the air outlet moves in the tank 1 along with the screw rod 22, so that air is dispersed in the tank 1 to increase the dissolved oxygen rate in the tank 1, thereby increasing the fermentation level of aerobic bacteria.
Referring to fig. 3, the spline shaft 23 is connected to an end of the air inlet pipe 5 extending into the tank 1, and a hollow cavity is formed in the spline shaft 23 so that the air inlet pipe 5 communicates with the first cavity 221. It should be noted that, spline shaft 23 inserts and establishes in lead screw 22, and the inner wall of lead screw 22 has the tooth's socket face that meshes with the outer wall of spline shaft 23, and when intake pipe 5 drove the relative jar body 1 rotation of spline shaft 23, the tooth's socket face of spline shaft 23 meshes with the tooth's socket face of lead screw 22 inner wall to drive lead screw 22 and rotate in jar body 1, lead screw 22 is fixed in the rotation, and sleeve pipe 21 is fixed relative jar body 1 for lead screw 22 takes place axial displacement in jar body 1 relative spline shaft 23, thereby realizes that lead screw 22 takes place axial displacement in jar body 1 internal rotation. In addition, it should be noted that, the inner wall of one end of the screw rod 22 near the bottom of the tank 1 is provided with a limiting ring, and the outer wall of one end of the spline shaft 23 near the top of the tank 1 is provided with a limiting ring, so as to prevent the screw rod 22 from separating from the spline shaft 23 when axially displacing relative to the spline shaft 23.
The stirring vane 25 is mounted on the outer wall of the screw 22 having one end of the air outlet, and referring to fig. 4, a second cavity is formed in the stirring vane 25, and an opening is formed at the connection portion of the stirring vane 25 and the screw 22, so that the second cavity is communicated with the first cavity 221, and air in the first cavity 221 enters the second cavity. In the present embodiment, the stirring blade 25 is mounted on the outer wall of the screw 22 through a bolt connection so as to facilitate the disassembly and cleaning of the stirring blade 25, and it should be noted that the connection manner of the stirring blade 25 and the screw 22 is not limited thereto, and the stirring blade 25 is mounted on the screw 22 through a rivet connection. In addition, in this embodiment, a plurality of air outlet holes are formed on a surface of the stirring vane 25 facing the bottom of the tank body 1, and the plurality of air outlet holes are used for dispersing air in the second cavity into small bubbles and discharging the small bubbles into the tank body 1 so as to improve the air oxygen dissolution rate in the tank body 1. Like this, lead screw 22 takes place axial displacement in jar body 1 relatively when jar body 1 internal rotation, stirring leaf 25 moves in jar body 1 along with lead screw 22 to evenly disperse the bubble in whole jar body 1, simultaneously, stirring leaf 25 moves and drives good oxygen fungus and move in jar body 1, make good oxygen fungus and bubble fully contact, thereby improve good oxygen fungus's fermentation level, in addition, a plurality of ventholes of stirring leaf 25 are offered in the one side towards jar body 1 bottom, form the bubble after the air discharge and move to jar body 1 top one end, stirring leaf 25 smashes the bubble that rises, in order to improve the dissolved oxygen rate of jar body 1 internal air, thereby improve good oxygen fungus's fermentation level.
On the basis of the above, in order to drive the stirring element 2 to rotate, referring to fig. 1, an air inlet device of a fermenter may further comprise a motor 4. The motor 4 is installed below the tank 1, and the output end of the motor 4 rotates to drive the air inlet pipe 5 to rotate. In this embodiment, the motor 4 drives the air inlet pipe 5 to rotate through gear transmission. Specifically, the driving wheel 41 is sleeved outside the output end of the motor 4, the driven wheel 42 is sleeved outside one end of the air inlet pipe 5 extending out of the tank body 1, and the driven wheel 42 is meshed with the driving wheel 41. The output end of the motor 4 rotates to drive the driving wheel 41 to rotate, and the driving wheel 41 is meshed with the driven wheel 42 to drive the driven wheel 42 to rotate so as to realize the rotation of the air inlet pipe 5. Thus, through the structure, the motor 4 drives the air inlet pipe 5 to rotate, so that the air inlet pipe 5 drives the screw rod 22 to move in the tank body 1, and bubbles are uniformly dispersed in the tank body 1.
On the basis of the above, in order to disperse the air into the tank 1, referring to fig. 2, an air inlet device of the fermenter may further include an air cone 26. The air cone 26 is arranged at the air outlet of the screw rod 22, the air cone 26 is communicated with the first cavity 221, air in the first cavity 221 enters the air cone 26, the air cone 26 sprays the air into the tank body 1, in addition, the air cone 26 moves in the tank body 1 along with the screw rod 22, and the air is dispersed in the tank body 1, so that aerobic bacteria in the tank body 1 are fully contacted with the air, and the fermentation level of the aerobic bacteria is improved. It should be noted that, the air cone 26 is conical or conical, so that air is quickly sprayed into the tank 1, and the dissolved oxygen rate in the tank 1 is improved, thereby facilitating the fermentation of aerobic bacteria.
On the basis of the above, referring to fig. 3, a fermenter air inlet apparatus may further include a baffle 24. A baffle 24 is mounted within the screw 22 and is located at an end adjacent the air outlet. A plurality of baffles 24 are installed in the screw 22 to divide the first cavity 221 into a plurality of air flow channels. Referring to fig. 4, in the present embodiment, a plurality of guide plates 24 are fixedly installed in the screw 22 by welding, so that the guide plates 24 are connected more stably in the screw 22, and the air inlet device is prevented from being affected by loosening of the guide plates 24 due to excessive air flow into the screw 22. After entering the first cavity 221, the air is divided into a plurality of air flows by a plurality of guide plates 24 in the screw rod 22, after the air is split, a part of the air enters the second cavity of the stirring blade 25, the air is dispersed into bubbles after passing through the air outlet holes formed in the stirring blade 25, and then is discharged into the tank 1 towards the bottom of the tank 1, and the other part of the air is discharged into the tank 1 towards the top of the tank 1 through the air cone 26, so that the air is uniformly dispersed in the tank 1.
On the basis of the above, referring to fig. 1, a fermenter air inlet apparatus may further include a bracket 3. The motor 4 is arranged on the bracket 3, and one end of the spline shaft 23 extending out of the tank body 1 is rotatably arranged on the bracket 3. In this embodiment, the air inlet pipe 5 rotates to drive the screw rod 22 to move in the tank 1, so as to prevent the tank 1 from shaking during use due to rotation of the air inlet pipe 5 and the stirring member 2, and the bracket 3 is fixedly installed below the tank 1 in a welding manner and is used for supporting and fixing the tank 1 so as to prevent the tank 1 from being unstable during use.
To sum up, in the fermentation cylinder air intake process, firstly, air enters the tank body 1 through the air inlet pipe 5, the first cavity 221 is formed in the screw rod 22, the air enters the first cavity 221 through the air inlet pipe 5, the plurality of guide plates 24 are arranged on the inner wall of the screw rod 22 close to the air outlet, the air entering the first cavity 221 is split, after the air is split, part of the air enters the second cavity in the stirring blade 25, the air in the second cavity is dispersed into bubbles through the plurality of air outlet holes formed in the stirring blade 25 and then is discharged into the tank body 1, the bubbles rise in the tank body 1, and the rising bubbles are further scattered by the stirring blade 25, so that aerobic bacteria and the air are fully contacted. The rest of the gas is sprayed into the tank body 1 through a gas cone 26 arranged at the gas outlet of the screw rod 22 so as to increase the dissolved oxygen rate in the tank body 1. In addition, the driving wheel 41 sleeved at the output end of the motor 4 is meshed with the driven wheel 42 sleeved at one end of the air inlet pipe 5 extending out of the tank body 1, the purpose that the motor 4 drives the air inlet pipe 5 to rotate is achieved, the spline shaft 23 is connected to one end of the air inlet pipe 5 located in the tank body 1, the inner wall of the screw rod 22 is provided with a tooth groove surface meshed with the spline shaft 23, the spline shaft 23 rotates along with the air inlet pipe 5 to drive the screw rod 22 to move in the tank body 1, the screw rod 22 rotates along with the spline shaft 23 and simultaneously moves in the tank body 1 along the axial direction of the spline shaft 23, the stirring vane 25 and the air cone 26 are mounted at one end of the screw rod 22, the screw rod 22 moves and drives the stirring vane 25 and the air cone 26 to move in the tank body 1, so that bubbles are dispersed in the whole tank body 1, and the air oxygen dissolution rate in the tank body 1 is improved. In addition, the stirring piece 2 moves in the tank body 1 to drive the aerobic bacteria to move in the tank body 1, so that microorganisms in the tank body 1 are fully contacted with bubbles, and the fermentation level of the aerobic bacteria is improved.
The above description is merely an embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present utility model, and it is intended to cover the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (6)

1. A fermenter air inlet arrangement comprising:
a tank body (1);
The air inlet pipe (5) is rotatably arranged at the bottom of the tank body (1), and one end of the air inlet pipe (5) is communicated with the outside;
Stirring piece (2), one end is installed intake pipe (5) stretches into the one end in jar body (1), have first cavity (221) in stirring piece (2), first cavity (221) with intake pipe (5) are linked together, the other end of stirring piece (2) has the gas outlet, intake pipe (5) rotate in order to drive stirring piece (2) rotate, stirring piece (2) rotate in order to be relative intake pipe (5) take place axial displacement.
2. A fermenter air inlet arrangement according to claim 1, wherein the stirring element (2) comprises:
One end of the sleeve (21) is arranged at the bottom of the tank body (1);
the screw rod (22) is inserted into the sleeve (21), one end of the screw rod (22) is communicated with the air inlet pipe (5), the other end of the screw rod is provided with the air outlet, the first cavity (221) is positioned in the screw rod (22) so as to be communicated with the air inlet pipe (5) and the air outlet, and the inner wall of the sleeve (21) is provided with threads corresponding to the screw rod (22);
The spline shaft (23) is connected to one end of the air inlet pipe (5) extending into the tank body (1) and is inserted into the screw rod (22), a tooth groove surface meshed with the spline shaft (23) is formed in the inner wall of the screw rod (22), the air inlet pipe (5) rotates to drive the spline shaft (23) to rotate, the spline shaft (23) rotates to drive the screw rod (22) to rotate and enable the screw rod (22) to axially move, and a hollow cavity is formed in the spline shaft (23) to enable the first cavity (221) to be communicated with the air inlet pipe (5);
Stirring leaf (25) are installed lead screw (22) are close to the one end of gas outlet, have the second cavity in stirring leaf (25), first cavity (221) with the second cavity is linked together, it has a plurality of ventholes to open on stirring leaf (25), lead screw (22) motion is in order to drive stirring leaf (25) motion.
3. A fermenter air inlet arrangement according to claim 2, further comprising:
The motor (4) is positioned below the tank body (1), and the motor (4) is provided with an output end so as to drive the air inlet pipe (5) to rotate.
4. A fermenter air inlet arrangement according to claim 3, further comprising:
The air cone (26) is arranged at the air outlet of the screw rod (22) and is used for dispersing air and then discharging the air into the tank body (1).
5. The fermenter air inlet unit according to claim 4, further comprising:
And the guide plate (24) is arranged in the screw rod (22) and is used for dividing the gas in the screw rod (22).
6. The fermenter air inlet unit according to claim 5, further comprising:
The support (3) is arranged below the tank body (1), the motor (4) is arranged on the support (3), and one end of the air inlet pipe (5) extending out of the tank body (1) is rotationally connected with the support (3).
CN202322769182.6U 2023-10-16 2023-10-16 Air inlet device of fermentation tank Active CN220926755U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202322769182.6U CN220926755U (en) 2023-10-16 2023-10-16 Air inlet device of fermentation tank

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202322769182.6U CN220926755U (en) 2023-10-16 2023-10-16 Air inlet device of fermentation tank

Publications (1)

Publication Number Publication Date
CN220926755U true CN220926755U (en) 2024-05-10

Family

ID=90935502

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202322769182.6U Active CN220926755U (en) 2023-10-16 2023-10-16 Air inlet device of fermentation tank

Country Status (1)

Country Link
CN (1) CN220926755U (en)

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