Gamma-aminobutyric acid preparation fermentation equipment

Abstract

The invention provides gamma-aminobutyric acid preparation fermentation equipment, and relates to the technical field of microbial fermentation. A tank cover is fixedly mounted at the top of the fermentation tank body; a motor is fixedly connected to the top of the tank cover; a reciprocating lead screw is mounted on a driving shaft of the motor and is positioned in the fermentation tank body; a planet carrier is connected to the top of the fermentation tank body, two pinions are symmetrically mounted in the planet carrier, and an impeller is connected to the bottom of the planet carrier. The driving planet carrier is driven by the motor to rotate, then the impeller is driven to rotate synchronously, and materials are fully stirred by the impeller; meanwhile, the reciprocating lead screw drives the impeller to move up and down through the reciprocating sliding block, the height of the impeller is adjusted, and the material stirring efficiency is improved. The problems that in practical application of an existing fermentation tank used for preparing gamma-aminobutyric acid, an impeller used for stirring materials generally adopts a fixed arrangement mode, the process of uniformly stirring the materials is relatively time-consuming, and the overall stirring efficiency is relatively low are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of microbial fermentation, and particularly to a fermentation device for preparing γ-aminobutyric acid. Background Art

[0002] γ-aminobutyric acid is a natural amino acid composed of four-carbon non-protein, and is an important inhibitory neurotransmitter in the mammalian central nervous system. It has physiological functions such as enhancing brain cell metabolism, lowering blood pressure, activating kidney function, improving liver function, preventing obesity, and promoting ethanol metabolism. With the in-depth study of its physiological functions, γ-aminobutyric acid has developed into a new type of active functional factor and is widely used in the fields of food industry, medicine, food health care, chemical industry, and agriculture.

[0003] For example, the Chinese patent "CN108192806B A fermentation tank for preparing a fruit and vegetable enzyme drink" includes a tank body and a thickened heat insulation layer located outside it. The bottom plate of the tank body is a special-shaped partition plate. An air inflation chamber is provided below the special-shaped partition plate. A convex column is provided in the middle of the air inflation chamber. An air inflation pipe is provided on the side of the air inflation chamber. The projection of the special-shaped partition plate body downward is circular. The plate body is provided with an installation hole, and a positioning block is fixed at the upper end. A stirring motor, an air outlet valve, and a feed pipe are provided at the upper part of the tank body. The upper end of the stirring motor is fixed to the stirring shaft. The lower end of the stirring shaft is rotationally restricted in the positioning block. Multiple layers of stirring blades are fixed on the shaft body of the stirring shaft. A filter mesh cover is fixed in the upper part of the inner cavity of the tank body, and a discharge pipe is provided at the lower part.

[0004] In the actual application of the fermentation tank used for preparing γ-aminobutyric acid at present, the impeller for stirring materials generally adopts a fixed setting method. This design makes the impeller can only rotate at a fixed position, which leads to a time-consuming process of evenly stirring the materials and a relatively low overall stirring efficiency. And there are also certain problems in the discharging link. Since the amount of materials required for a single batch preparation is large, the discharging process is relatively slow, and it often takes a long time to completely discharge the materials, which is very likely to affect the preparation progress of the next batch of γ-aminobutyric acid. Summary of the Invention

[0005] The present invention relates to a fermentation device for preparing γ-aminobutyric acid. When the motor drives the reciprocating lead screw to rotate, the large gear drives the small gear to rotate accordingly. Under the action of the small gear meshing with the gear ring, the planet carrier is driven to rotate, and then the impeller is driven to rotate synchronously. The impeller fully stirs the materials to ensure that the materials can be completely fermented. At the same time, the reciprocating lead screw drives the impeller to move up and down through the reciprocating slider, adjusting the height of the impeller, thereby improving the stirring efficiency of the materials.

[0006] In the first aspect of the present invention, a fermentation device for preparing γ-aminobutyric acid is provided, specifically including: a fermentation tank body, a tank cover, a motor, a reciprocating lead screw, a planetary carrier, a small gear, an impeller, a reciprocating slider, and a connector; the top of the fermentation tank body is fixedly installed with a tank cover, and the top of the tank cover is fixedly connected with a motor; a reciprocating lead screw is installed on the driving shaft of the motor, and the reciprocating lead screw is located inside the fermentation tank body; the top of the fermentation tank body is connected with a planetary carrier, two small gears are symmetrically installed inside the planetary carrier, and the bottom of the planetary carrier is connected with an impeller; a reciprocating slider is installed at the center of the impeller, and the reciprocating lead screw is connected with the reciprocating slider; the outside of the fermentation tank body is fixedly connected with a connector, and the connector is connected with an air pump and a water pump.

[0007] Further, the planetary carrier is in rotational contact with the top of the fermentation tank body, a U-shaped guide rod is provided at the bottom of the planetary carrier, and two sliding holes are symmetrically arranged inside the impeller, and the U-shaped guide rod slidably penetrates through the sliding holes.

[0008] Further, a toothed ring is provided at the top of the fermentation tank body, the small gear is rotatably connected with the planetary carrier, and the toothed ring is meshed with the two small gears.

[0009] Further, a large gear is arranged outside the reciprocating lead screw, the large gear is rotatably connected inside the planetary carrier, the two small gears are meshed with the large gear, the reciprocating lead screw is connected through the reciprocating slider, when the motor drives the reciprocating lead screw to rotate, the large gear drives the small gear to rotate, the small gear drives the planetary carrier to rotate under the influence of meshing with the toothed ring, the planetary carrier drives the impeller to rotate synchronously, the impeller fully stirs the material, and the reciprocating lead screw drives the impeller to move up and down reciprocally through the reciprocating slider, changing the height where the impeller is located.

[0010] Further, an annular spray pipe is provided at the top of the fermentation tank body, spray holes are arranged around the outside of the annular spray pipe, the spray holes are inclined, and the spray holes are respectively oriented towards the inner wall of the fermentation tank body and the impeller.

[0011] Further, the connector is composed of a valve body, a first valve rod, a first spring, a second valve rod, and a second spring. An exhaust port, an inlet and outlet port, a pressurizing port, and a water inlet are arranged outside the valve body, an internal connection port is arranged inside the valve body, the inlet and outlet port is communicated with the annular spray pipe, the gas generated by the material fermentation is discharged into the connector through the annular spray pipe, and then discharged to the outside through the connector, ensuring that the air pressure inside the fermentation tank body is always equal to the outside.

[0012] Further, the exhaust port and the water inlet are communicated with the inlet and outlet port through the internal connection port, the pressurizing port is communicated with the air pump through a pipeline, and the water inlet is communicated with the water pump through a pipeline.

[0013] Further, the first valve rod is slidably connected to the valve body. The bottom of the first valve rod is located inside the pressurizing port. The first spring is sleeved outside the first valve rod. The bottom of the first spring contacts the first valve rod, and the top of the first spring contacts the inner wall of the valve body. After the material inside the fermentation tank is converted into γ-aminobutyric acid by lactic acid bacteria, the discharge valve at the bottom of the fermentation tank is opened, and the air pump is in operation. The air at the pressurizing port pushes the first valve rod open, the first spring contracts under force, the first valve rod seals the inner connection port, the pressurizing port is in communication with the inlet and outlet port, and the air pump pressurizes the inside of the fermentation tank, causing the material to be discharged from the inside of the fermentation tank at an accelerated rate under the influence of pressure.

[0014] Further, the second valve rod is slidably connected to the valve body. The bottom of the second valve rod is located inside the water inlet. The second spring is sleeved outside the second valve rod. The bottom of the second spring contacts the second valve rod, and the top of the second spring contacts the inner wall of the valve body. After the material inside the fermentation tank is drained, the water pump is in operation. The water flow at the water inlet pushes the second valve rod open, the second spring contracts under force, the second valve rod seals the exhaust port, the water inlet is connected to the inlet and outlet port through the inner connection port, and the water pump transports the water flow into the annular spray pipe, and the spray holes spray the water flow to wash the material residues remaining on the inner wall of the fermentation tank and the impeller.

[0015] The present invention provides a fermentation device for preparing γ-aminobutyric acid, which has the following beneficial effects:

[0016] When the present invention is in use, through the sliding fit of the U-shaped guide rod and the sliding hole, it plays a guiding effect on the up and down movement of the impeller. When the motor drives the reciprocating lead screw to rotate, the large gear drives the small gear to rotate. The small gear drives the planet carrier to rotate under the influence of meshing with the gear ring, and the planet carrier drives the impeller to rotate synchronously. The impeller fully stirs the material, enabling the material to be fully fermented; at the same time, the reciprocating lead screw drives the impeller to move up and down reciprocally through the reciprocating slider, changing the height of the impeller, effectively improving the material stirring efficiency; the gas generated by the material fermentation is discharged into the communicating vessel through the annular spray pipe and then discharged to the outside through the communicating vessel, ensuring that the air pressure inside the fermentation tank is always equal to the outside, playing a protective role, and effectively avoiding potential safety hazards caused by excessive pressure inside the fermentation tank due to fermentation.

[0017] In addition, after the material inside the fermentation tank is converted into γ-aminobutyric acid by lactic acid bacteria, the discharge valve at the bottom of the fermentation tank is opened, and the air pump is in operation. The air at the pressurizing port pushes the first valve rod open, the first spring contracts under force, the first valve rod seals the inner connection port, the pressurizing port is in communication with the inlet and outlet port, and the air pump pressurizes the inside of the fermentation tank, causing the material to be discharged from the inside of the fermentation tank at an accelerated rate under the influence of pressure, shortening the discharge time and effectively improving the preparation efficiency of γ-aminobutyric acid.

[0018] In addition, after the materials inside the fermentation tank are completely drained, the air pump stops running. The first valve rod resets under the influence of the thrust of the first spring, blocking the pressurizing port. The water pump is in operation, and the water flow at the water inlet pushes open the second valve rod. The second spring contracts under force, and the second valve rod blocks the exhaust port. The water inlet is connected to the inlet and outlet through the internal connection port. The water pump transports the water flow into the annular nozzle, and the spray holes spray out the water flow to wash the material residues remaining on the inner wall of the fermentation tank and the impeller, ensuring the cleanliness inside the fermentation tank, effectively preventing the material residues from deteriorating and affecting the preparation quality of the next batch of γ-aminobutyric acid.

[0019] Other advantages, objectives, and features of the present invention will be partially reflected by the following description and partially understood by those skilled in the art through the research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly introduced below.

[0021] The accompanying drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0022] In the drawings:

[0023] Figure 1 The overall axonometric structure diagram of the γ-aminobutyric acid preparation fermentation equipment of the present application is shown;

[0024] Figure 2 The structure diagram of the connection between the impeller and the fermentation tank body of the γ-aminobutyric acid preparation fermentation equipment of the present application is shown;

[0025] Figure 3 The sectional structure diagram of the fermentation tank body of the γ-aminobutyric acid preparation fermentation equipment of the present application is shown;

[0026] Figure 4 The structure diagram of the connection between the reciprocating lead screw, the planetary carrier, and the pinion of the γ-aminobutyric acid preparation fermentation equipment of the present application is shown;

[0027] Figure 5 The structure diagram of the connection between the impeller and the reciprocating slider of the γ-aminobutyric acid preparation fermentation equipment of the present application is shown;

[0028] Figure 6 The axonometric structure diagram of the communicating vessel of the γ-aminobutyric acid preparation fermentation equipment of the present application is shown;

[0029] Figure 7 The sectional structure diagram of the communicating vessel of the γ-aminobutyric acid preparation fermentation equipment of the present application is shown;

[0030] Figure 8The schematic cross-sectional structure diagram of the valve body of the γ-aminobutyric acid preparation fermentation equipment of the present application is shown.

[0031] List of reference numerals

[0032] 1. Fermentation tank body; 11. Tooth ring; 12. Annular nozzle; 121. Spray hole; 2. Tank cover; 3. Motor; 4. Reciprocating lead screw; 41. Large gear; 5. Planet carrier; 51. U-shaped guide rod; 6. Small gear; 7. Impeller; 71. Slide hole; 8. Reciprocating slider; 9. Communicator; 91. Valve body; 911. Exhaust port; 912. Inner connection port; 913. Inlet and outlet port; 914. Pressurizing port; 915. Water inlet; 92. First valve rod; 93. First spring; 94. Second valve rod; 95. Second spring. Detailed implementation manners

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] Please refer to Figures 1 to 8 : Embodiment 1:

[0035] The present invention provides a γ-aminobutyric acid preparation fermentation equipment, including: a fermentation tank body 1, a tank cover 2, a motor 3, a reciprocating lead screw 4, a planet carrier 5, a small gear 6, an impeller 7, a reciprocating slider 8, and a communicator 9; the fermentation tank body 1 is fixedly installed with the tank cover 2 at the top, and the tank cover 2 is fixedly connected with the motor 3 at the top; the driving shaft of the motor 3 is installed with the reciprocating lead screw 4, and the reciprocating lead screw 4 is located inside the fermentation tank body 1; the fermentation tank body 1 is connected with the planet carrier 5 at the top, two small gears 6 are symmetrically installed inside the planet carrier 5, and the planet carrier 5 is connected with the impeller 7 at the bottom; the reciprocating slider 8 is installed at the center of the impeller 7, and the reciprocating lead screw 4 is connected with the reciprocating slider 8; the fermentation tank body 1 is fixedly connected with the communicator 9 outside, and the communicator 9 is connected with an air pump and a water pump.

[0036] In this embodiment, the planet carrier 5 is in rotational contact with the top of the fermentation tank body 1, a U-shaped guide rod 51 is provided at the bottom of the planet carrier 5, two slide holes 71 are symmetrically provided inside the impeller 7, and the U-shaped guide rod 51 slides through the slide holes 71; a tooth ring 11 is provided at the top of the fermentation tank body 1, the small gear 6 is rotatably connected with the planet carrier 5, the tooth ring 11 is meshed with the two small gears 6, a large gear 41 is provided outside the reciprocating lead screw 4, the large gear 41 is rotatably connected inside the planet carrier 5, the two small gears 6 are meshed with the large gear 41, and the reciprocating lead screw 4 is connected through the reciprocating slider 8;

[0037] With the above technical solution, the U-shaped guide rod 51 is in sliding fit with the sliding hole 71, which plays a guiding role in the up and down movement of the impeller 7. When the motor 3 drives the reciprocating lead screw 4 to rotate, the large gear 41 drives the small gear 6 to rotate. Affected by the meshing with the toothed ring 11, the small gear 6 drives the planet carrier 5 to rotate, and the planet carrier 5 drives the impeller 7 to rotate synchronously. The impeller 7 fully stirs the material, enabling the material to be fully fermented. At the same time, the reciprocating lead screw 4 drives the impeller 7 to reciprocate up and down through the reciprocating slider 8, changing the height of the impeller 7, and effectively improving the material stirring efficiency.

[0038] In this embodiment, an annular spray pipe 12 is provided at the top of the fermentation tank body 1. Spray holes 121 are arranged around the outside of the annular spray pipe 12. The spray holes 121 are inclined and respectively face the inner wall of the fermentation tank body 1 and the impeller 7. The communicating vessel 9 is composed of a valve body 91, a first valve rod 92, a first spring 93, a second valve rod 94 and a second spring 95. An exhaust port 911, an inlet and outlet port 913, a pressurizing port 914, and a water inlet 915 are arranged outside the valve body 91. An internal connection port 912 is arranged inside the valve body 91. The inlet and outlet port 913 is communicated with the annular spray pipe 12.

[0039] With the above technical solution, the gas generated by the material fermentation is discharged into the communicating vessel 9 through the annular spray pipe 12 and then discharged to the outside through the communicating vessel 9, ensuring that the internal pressure of the fermentation tank body 1 is always equal to the outside, playing a protective role, and effectively avoiding potential safety hazards caused by excessive pressure inside the fermentation tank body 1 due to fermentation.

[0040] In Embodiment 2, based on Embodiment 1, the exhaust port 911 and the water inlet 915 are connected to the inlet and outlet port 913 through the internal connection port 912. The pressurizing port 914 is connected to an air pump through a pipeline, and the water inlet 915 is connected to a water pump through a pipeline. The first valve rod 92 is slidably connected inside the valve body 91. The bottom of the first valve rod 92 is located inside the pressurizing port 914. The first spring 93 is sleeved outside the first valve rod 92. The bottom of the first spring 93 contacts the first valve rod 92, and the top of the first spring 93 contacts the inner wall of the valve body 91.

[0041] With the above technical solution, when the material inside the fermentation tank body 1 is converted into γ-aminobutyric acid by lactic acid bacteria, the discharge valve at the bottom of the fermentation tank body 1 is opened, and the air pump is in operation. The air at the pressurizing port 914 pushes the first valve rod 92 open, and the first spring 93 contracts under force. The first valve rod 92 blocks the internal connection port 912, and the pressurizing port 914 is in communication with the inlet and outlet port 913. The air pump pressurizes the inside of the fermentation tank body 1, causing the material to be discharged from the inside of the fermentation tank body 1 under the influence of pressure, shortening the discharge time, and effectively improving the preparation efficiency of γ-aminobutyric acid.

[0042] In this embodiment, the second valve rod 94 is slidably connected within the valve body 91. The bottom of the second valve rod 94 is located within the water inlet 915. The second spring 95 is sleeved outside the second valve rod 94. The bottom of the second spring 95 contacts the second valve rod 94, and the top of the second spring 95 contacts the inner wall of the valve body 91.

[0043] With the above technical solution, after the materials inside the fermentation tank body 1 are drained, the air pump stops operating. Under the influence of the thrust of the first spring 93, the first valve rod 92 resets and seals the pressurizing port 914. The water pump is in an operating state. The water flow at the water inlet 915 pushes open the second valve rod 94. The second spring 95 contracts under force, and the second valve rod 94 seals the exhaust port 911. The water inlet 915 is connected to the inlet and outlet port 913 through the internal connection port 912. The water pump transports the water flow into the annular spray pipe 12, and the spray holes 121 spray out the water flow to wash the material residues remaining on the inner wall of the fermentation tank body 1 and the impeller 7, ensuring the cleanliness inside the fermentation tank body 1, effectively preventing the material residues from deteriorating and affecting the preparation quality of the next batch of γ-aminobutyric acid.

[0044] The working principle of this embodiment: The materials required for the preparation of γ-aminobutyric acid are injected into the fermentation tank body 1. The materials are fermented by lactic acid bacteria. The gas generated by the fermentation of the materials is discharged into the communicating vessel 9 through the annular spray pipe 12 and then discharged to the outside through the communicating vessel 9, ensuring that the air pressure inside the fermentation tank body 1 is always equal to the outside. While the materials are fermenting, when the motor 3 drives the reciprocating lead screw 4 to rotate, the large gear 41 drives the small gear 6 to rotate. The small gear 6 drives the planet carrier 5 to rotate under the influence of meshing with the gear ring 11. The planet carrier 5 drives the impeller 7 to rotate synchronously. The impeller 7 fully stirs the materials, enabling the materials to be fully fermented. The reciprocating lead screw 4 drives the impeller 7 to move up and down reciprocally through the reciprocating slider 8, changing the height of the impeller 7 and effectively improving the material stirring efficiency. After the materials inside the fermentation tank body 1 are converted into γ-aminobutyric acid by lactic acid bacteria, the discharge valve at the bottom of the fermentation tank body 1 is opened. The air pump is in an operating state. The air at the pressurizing port 914 pushes open the first valve rod 92. The first spring 93 contracts under force, and the first valve rod 92 seals the internal connection port 912. The pressurizing port 914 is in communication with the inlet and outlet port 913. The air pump pressurizes the inside of the fermentation tank body 1, causing the materials to be discharged from the inside of the fermentation tank body 1 at an accelerated rate under the influence of the pressure. After the materials inside the fermentation tank body 1 are drained, the air pump stops operating. Under the influence of the thrust of the first spring 93, the first valve rod 92 resets and seals the pressurizing port 914. The water pump is in an operating state. The water flow at the water inlet 915 pushes open the second valve rod 94. The second spring 95 contracts under force, and the second valve rod 94 seals the exhaust port 911. The water inlet 915 is connected to the inlet and outlet port 913 through the internal connection port 912. The water pump transports the water flow into the annular spray pipe 12, and the spray holes 121 spray out the water flow to wash the material residues remaining on the inner wall of the fermentation tank body 1 and the impeller 7.

[0045] In this article, the following points need attention:

[0046] 1. The accompanying drawings of the embodiments of the present invention only relate to the structures involved in the embodiments of the present invention, and other structures can refer to the general design.

[0047] 2. Without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other to obtain new embodiments.

[0048] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A fermentation device for preparing γ-aminobutyric acid, comprising: Fermentation tank body (1), tank cover (2), motor (3), reciprocating lead screw (4), planetary carrier (5), pinion gear (6), impeller (7), reciprocating slider (8) and connector (9); It is characterized in that a tank cover (2) is fixedly installed on the top of the fermentation tank body (1), and a motor (3) is fixedly connected to the top of the tank cover (2); A reciprocating lead screw (4) is installed on the driving shaft of the motor (3), and the reciprocating lead screw (4) is located inside the fermentation tank body (1); The top of the fermentation tank body (1) is connected with a planetary carrier (5), two pinion gears (6) are symmetrically installed inside the planetary carrier (5), and the bottom of the planetary carrier (5) is connected with an impeller (7); A reciprocating slider (8) is installed at the central part of the impeller (7), and the reciprocating lead screw (4) is connected to the reciprocating slider (8); A connector (9) is fixedly connected to the outside of the fermentation tank body (1), and the connector (9) is connected to an air pump and a water pump.

2. The γ-aminobutyric acid preparation fermentation equipment according to claim 1, characterized in that The planetary carrier (5) is in rotational contact with the top of the fermentation tank body (1), a U-shaped guide rod (51) is arranged at the bottom of the planetary carrier (5), and two sliding holes (71) are symmetrically arranged inside the impeller (7), and the U-shaped guide rod (51) slidably penetrates through the sliding holes (71).

3. The γ-aminobutyric acid preparation fermentation equipment according to claim 1, characterized in that A gear ring (11) is arranged at the top of the fermentation tank body (1), the pinion gear (6) is rotatably connected to the planetary carrier (5), and the gear ring (11) is meshed with the two pinion gears (6).

4. The γ-aminobutyric acid preparation fermentation equipment according to claim 1, characterized in that A large gear (41) is arranged outside the reciprocating lead screw (4), the large gear (41) is rotatably connected inside the planetary carrier (5), the two pinion gears (6) are meshed with the large gear (41), and the reciprocating lead screw (4) is connected through the reciprocating slider (8).

5. The γ-aminobutyric acid preparation fermentation equipment according to claim 1, characterized in that A ring-shaped spray pipe (12) is arranged at the top of the fermentation tank body (1), spray holes (121) are arranged around the outside of the ring-shaped spray pipe (12), the spray holes (121) are inclined, and the spray holes (121) are respectively directed towards the inner wall of the fermentation tank body (1) and the impeller (7).

6. The γ-aminobutyric acid preparation fermentation equipment according to claim 5, characterized in that The connector (9) is composed of a valve body (91), a first valve rod (92), a first spring (93), a second valve rod (94) and a second spring (95). An exhaust port (911), an inlet and outlet port (913), a pressurizing port (914), and a water inlet port (915) are arranged outside the valve body (91), an internal connection port (912) is arranged inside the valve body (91), and the inlet and outlet port (913) is communicated with the ring-shaped spray pipe (12).

7. The γ-aminobutyric acid preparation fermentation equipment according to claim 6, characterized in that The exhaust port (911) and the water inlet (915) are communicated with the inlet and outlet port (913) through the internal connection port (912). The pressurizing port (914) is communicated with an air pump through a pipeline, and the water inlet (915) is communicated with a water pump through a pipeline.

8. A fermentation device for preparing γ-aminobutyric acid according to claim 6, wherein The first valve rod (92) is slidably connected inside the valve body (91). The bottom of the first valve rod (92) is located inside the pressurizing port (914). The first spring (93) is sleeved outside the first valve rod (92). The bottom of the first spring (93) contacts the first valve rod (92), and the top of the first spring (93) contacts the inner wall of the valve body (91).

9. A fermentation device for preparing γ-aminobutyric acid according to claim 6, wherein The second valve rod (94) is slidably connected inside the valve body (91). The bottom of the second valve rod (94) is located inside the water inlet (915). The second spring (95) is sleeved outside the second valve rod (94). The bottom of the second spring (95) contacts the second valve rod (94), and the top of the second spring (95) contacts the inner wall of the valve body (91).

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