Pneumatic multi-point upper feeding and lower discharging device

Abstract

The invention belongs to the technical field of fermentation tanks, and particularly discloses a pneumatic multi-point upper-feeding lower-discharging device which comprises a fermentation tank, a feeding assembly and a discharging assembly are installed on the two sides of the fermentation tank respectively, six feeding ports are evenly formed in the end face of the top of the fermentation tank, conveying pipes are installed in the feeding ports, and the conveying pipes are connected with the feeding assembly and the discharging assembly. Six discharge pipes are uniformly connected to the bottom of the fermentation tank, an extension mechanism is arranged at the top of the fermentation tank, and six shielding mechanisms are uniformly arranged in the fermentation tank. Through the design of the feeding assembly and the discharging assembly, materials can be rapidly and stably conveyed, the device is suitable for materials which are difficult to flow or large in viscosity, the feeding efficiency is improved, strains can be sent back to the stirring tank, circulating inoculation is achieved, through the arrangement of the multiple conveying pipes and the multiple discharging pipes, material empty flowing can be prevented, fermentation dead angles are reduced, and the fermentation efficiency is improved. Meanwhile, under the cooperation of the extension mechanism and the shielding mechanism, the materials can be prevented from flowing along the tank wall, and bubbles generated when the materials flow in are reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of fermenters, and specifically discloses a pneumatic multi-point upper feeding and lower discharging device. Background Art

[0002] A biogas fermenter is a device used for anaerobic fermentation and gas production of biogas in rural households or small and medium-sized farms. It uses the metabolic action of microorganisms to convert organic matter into combustible gas, and is a renewable new energy device. A biogas fermenter usually consists of a storage bin, a stirrer, a feeding port and a discharging port.

[0003] For the existing feeding and discharging devices of biogas fermenters, it is difficult to rely on gravity flow, and the feeding process of materials with relatively high viscosity may not be smooth, slow and unstable, which cannot meet the demand for timely supply of materials in the fermentation process. In terms of discharging, there may be a lack of efficient conveying methods, resulting in a slow speed of discharging materials from the fermenter to the next processing link, a long residence time of materials in the device, and affecting the efficiency of the entire production process. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a pneumatic multi-point upper feeding and lower discharging device to solve the problems in the prior art that it is difficult to rely on gravity flow, the feeding process of materials with relatively high viscosity may not be smooth, slow and unstable, which cannot meet the demand for timely supply of materials in the fermentation process, and there may be a lack of efficient conveying methods in terms of discharging, resulting in a slow speed of discharging materials from the fermenter to the next processing link, a long residence time of materials in the device, and affecting the efficiency of the entire production process.

[0005] To achieve the above object, the present invention provides a pneumatic multi-point upper feeding and lower discharging device, including a fermenter. Upper feeding components and lower discharging components are respectively installed on both sides of the fermenter. The upper feeding component is used for inputting materials into the fermenter, and the lower discharging component is used for discharging the materials inside the fermenter. Six feeding ports are evenly opened on the end face of the top of the fermenter. A conveying pipe is installed inside the feeding port. The upper feeding component is connected to the fermenter through the six conveying pipes. Six discharging pipes are evenly connected to the bottom of the fermenter. The lower discharging component is connected to the fermenter through the six discharging pipes. An extension mechanism is arranged at the top of the fermenter, and the extension mechanism is used for extending the end of the conveying pipe. Six shielding mechanisms are evenly arranged inside the fermenter, and the shielding mechanisms cooperate with the extension mechanism.

[0006] In the above technical solution, preferably, the feeding assembly includes a stirring tank, a feeding tank is arranged on the side of the stirring tank, a first air pressure tank is arranged on the side of the feeding tank, a first vacuum pump is arranged below the stirring tank, and the material is sent into the feeding tank through the first vacuum pump, and then the material inside the feeding tank is sent into the fermentation tank through the first air pressure tank.

[0007] In the above technical solution, preferably, the discharging assembly includes a discharging tank, a second air pressure tank is installed on the side of the discharging tank, a second vacuum pump is arranged below the discharging tank, the air in the discharging tank is sucked out through the second vacuum pump, the bacteria in the fermentation tank are sucked into the discharging tank, and then the bacteria inside the discharging tank are transported to the stirring tank through the second air pressure tank.

[0008] In the above technical solution, preferably, cross brackets are installed at the bottoms of the stirring tank and the discharging tank, and the first vacuum pump and the second vacuum pump are respectively installed on the surfaces of the corresponding cross brackets.

[0009] In the above technical solution, preferably, a protruding tank is arranged at the top of the fermentation tank, the feeding port is opened on the side of the protruding tank, six support rods are evenly installed at the top of the protruding tank, a chuck is fixedly installed at the top of the support rod, and the other end of the chuck is fixedly connected to the top of the feeding pipe.

[0010] In the above technical solution, preferably, the extension mechanism includes an outer cover pipe, the outer cover pipe is rotatably installed on the outer surface of the protruding tank, six side blocks are evenly installed at the top of the fermentation tank, the six side blocks and the six feeding pipes are arranged in an alternating manner, the side blocks slide close to the surface of the outer cover pipe, six path grooves are evenly opened on the surface of the outer cover pipe, the path grooves are integrally arranged in an inclined shape, an extension pipe is movably sleeved on the outer surface of the feeding pipe, the bottom of the extension pipe is installed in the inner cavity of the fermentation tank, a movable column is arranged on the surface of the extension pipe near the top end, the surface of the movable column is movably clamped in the path groove, and a driving assembly is installed above the protruding tank.

[0011] In the above technical solution, preferably, the driving assembly includes an L-shaped bracket, the L-shaped bracket is fixedly installed at the top of the protruding tank, a gear is rotatably installed below the L-shaped bracket, a stepping motor is installed at the top of the L-shaped bracket, the output end of the stepping motor is connected to the gear, the top of the outer cover pipe protrudes from the protruding tank, a rack is arranged on the inner wall of the top of the outer cover pipe, and the gear meshes with the rack.

[0012] In the above technical solution, preferably, the shielding mechanism includes a cylindrical bar, the cylindrical bar is fixedly installed at the top inside the fermentation tank, and the cylindrical bar is integrally arranged in an inclined shape, with the bottom of the cylindrical bar offset towards the center of the fermentation tank. A side ring is fixedly arranged at the bottom of the extension pipe. One end of the side ring close to the cylindrical bar is installed with a baffle through a hinge. An arc-shaped guide block is arranged on the surface of the baffle close to the center of the fermentation tank, and an arc-shaped clamping block is arranged at the other end of the baffle. The arc-shaped clamping block is movably clamped on the surface of the cylindrical bar. A boss is arranged on the inner wall of the side ring, and the boss corresponds to the bottom surface of the feeding pipe.

[0013] In the above technical solution, preferably, the six discharge pipes are vertically corresponding to the six side blocks.

[0014] Compared with the prior art, the present invention has the following beneficial effects: Using the first vacuum pump to send the material from the mixing tank to the feeding tank can extract the material more quickly and stably compared with traditional gravity feeding and other methods. It is especially suitable for materials that are difficult to flow by gravity or have high viscosity, ensuring smooth feeding and improving the feeding efficiency. The first air pressure tank provides greater conveying power to overcome the resistance of the material flowing in the feeding pipe, ensuring that the material reaches the fermentation tank quickly and in sufficient quantity to meet the demand for timely supply of the material for fermentation. Adopting the method of first vacuum adsorption and then air pressure pushing by the second vacuum pump and the second air pressure tank greatly improves the material conveying speed, reduces the residence time of the material in the device, helps to improve the efficiency of the entire production process. At the same time, the bacterial strains can enter the mixing tank to be mixed and inoculated with the new material and then enter the feeding process, forming a virtuous cycle. The design of the extension mechanism can flexibly change the position depth of the end of the feeding pipe inside the fermentation tank, which helps to accurately convey the material to the appropriate area according to the needs of different positions and different fermentation stages inside the fermentation tank, improving the uniformity of material distribution and the fermentation effect. And by extending the feeding pipe into the interior of the fermentation tank, it can avoid the material flowing along the tank wall and reduce the scaling on the tank wall. The inclined cylindrical bar in the shielding mechanism cooperates with the arc-shaped clamping block. When the extension pipe moves towards the bottom of the inner cavity of the fermentation tank, the bottom of the baffle moves towards the center, avoiding the material from splashing onto the inner wall of the fermentation tank. The arc-shaped guide block guides the material to flow into the fermentation tank at an arc angle, generating a forced swirl, reducing the bubbles generated when the material flows in, and ensuring the smoothness of the feeding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the device flow chart of the present invention; Figure 2 is the structural schematic diagram of the fermentation tank of the present invention; Figure 3 of the present invention Figure 2Enlarged view of location A in [the figure]; Figure 4 For the present invention Figure 2 Enlarged view of location B in [the figure]; Figure 5 Schematic diagram of the internal structure of the fermenter of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of location C in [the figure]; Figure 7 Cross-sectional view of the bottom structure of the extension pipe of the present invention; Figure 8 Schematic diagram of the structure of the stirring tank of the present invention; Figure 9 Schematic diagram of the structure of the discharge tank of the present invention.

[0016] In the figure: 1, fermenter; 2, stirring tank; 3, first vacuum pump; 4, feeding tank; 5, first air pressure tank; 6, discharge tank; 7, second vacuum pump; 8, second air pressure tank; 9, cross support; 10, protruding tank; 11, feed inlet; 12, support rod; 13, chuck; 14, conveying pipe; 15, extension mechanism; 16, outer cover pipe; 17, path groove; 18, extension pipe; 19, movable column; 20, drive assembly; 21, side stop block; 22, rack; 23, L-shaped support; 24, stepping motor; 25, gear; 26, side ring; 27, shielding mechanism; 28, cylindrical bar; 29, baffle; 30, arc-shaped clamping block; 31, arc-shaped guide block; 32, convex platform; 33, discharge pipe. Detailed implementation manners

[0017] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0018] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the limitations of the specific embodiments disclosed below.

[0019] Such as Figures 1 - 9A pneumatic multi-point upper-inlet and lower-outlet device as shown includes a fermentation tank 1. A feeding component and a discharging component are respectively installed on both sides of the fermentation tank 1. The feeding component is used to input materials into the fermentation tank 1, and the discharging component is used to discharge the materials inside the fermentation tank 1. Six feeding ports 11 are evenly opened on the end face at the top of the fermentation tank 1. A feeding pipe 14 is installed inside the feeding port 11. The feeding component is connected to the fermentation tank 1 through six feeding pipes 14. Six discharging pipes 33 are evenly connected to the bottom of the fermentation tank 1. The discharging component is connected to the fermentation tank 1 through six discharging pipes 33. An extension mechanism 15 is arranged at the top of the fermentation tank 1, and the extension mechanism 15 is used to extend the end of the feeding pipe 14. Six shielding mechanisms 27 are evenly arranged inside the fermentation tank 1, and the shielding mechanisms 27 cooperate with the extension mechanism 15. Through the design of the feeding component and the discharging component, materials can be transported quickly and stably, which is suitable for materials that are difficult to flow or have high viscosity, improving the feeding efficiency. And the strains can be sent back to the stirring tank 2 to achieve cyclic inoculation, reducing costs. By setting multiple feeding pipes 14 and multiple discharging pipes 33, the situation of material flow empty can be prevented, reducing fermentation dead corners. At the same time, with the cooperation of the extension mechanism 15 and the shielding mechanisms 27, the situation of materials flowing along the tank wall can be avoided, reducing the bubbles generated when the materials flow in, ensuring the smoothness of the feeding process.

[0020] The feeding component includes a stirring tank 2. A feeding tank 4 is arranged on the side of the stirring tank 2. A first air pressure tank 5 is arranged on the side of the feeding tank 4. A first vacuum pump 3 is arranged below the stirring tank 2. The materials are sent into the feeding tank 4 through the first vacuum pump 3, and then the materials inside the feeding tank 4 are sent into the fermentation tank 1 through the first air pressure tank 5. Using the first vacuum pump 3 to send the materials from the stirring tank 2 into the feeding tank 4, this method can extract the materials from the storage place to the feeding tank 4 more quickly and stably compared with the traditional gravity feeding or other simple feeding methods. Especially for some materials that are difficult to flow by gravity or have high viscosity, the suction provided by the vacuum pump can ensure the smooth progress of feeding, improving the feeding efficiency. Sending the materials inside the feeding tank 4 into the fermentation tank 1 through the first air pressure tank 5, the air pressure drive can provide greater conveying power, which can overcome the resistance of the materials flowing in the feeding pipe 14, ensuring that the materials can reach the fermentation tank 1 quickly and in sufficient quantity, meeting the demand for the timely supply of materials in the fermentation process.

[0021] The blanking assembly includes a discharge tank 6. A second air pressure tank 8 is installed on the side of the discharge tank 6, and a second vacuum pump 7 is arranged below the discharge tank 6. The second vacuum pump 7 sucks out the air in the discharge tank 6, and the strains in the fermentation tank 1 are sucked into the discharge tank 6. Then, the second air pressure tank 8 transports the strains inside the discharge tank 6 to the stirring tank 2. By using the second vacuum pump 7 to suck out the air in the discharge tank 6, a negative pressure environment is formed, which can quickly suck the materials in the fermentation tank 1 into the discharge tank 6. Subsequently, the air pressure generated by the second air pressure tank 8 can quickly transport the materials in the discharge tank 6 to the stirring tank 2. This way of first vacuum adsorption and then air pressure pushing greatly improves the material transportation speed, reduces the residence time of the materials in the device, helps to improve the efficiency of the entire production process, and enables the strains to enter the stirring tank 2 to be stirred and inoculated with new materials before the feeding procedure.

[0022] The stirring tank 2 is connected to the feeding tank 4 through a conveying pipe fitting. Through the suction of the first vacuum pump 3, the materials in the stirring tank 2 are transported to the feeding tank 4 through the pipeline. The other end of the feeding tank 4 is connected to the first air pressure tank 5 through a conveying pipe fitting, and the other end of the first air pressure tank 5 is connected to the top of the fermentation tank 1 through a conveying pipe fitting, thus realizing the feeding operation of the fermentation tank 1. The bottom of the fermentation tank 1 is connected to the discharge tank 6 through a connecting pipe fitting. Through the suction of the second vacuum pump 7, the materials in the fermentation tank 1 are sucked into the discharge tank 6 through the discharge pipe 33. The other end of the discharge tank 6 is connected to the second air pressure tank 8 through a conveying pipe fitting. Finally, the other end of the second air pressure tank 8 is connected to the stirring tank 2 through a conveying pipe fitting. Through the air pressure drive of the second air pressure tank 8, the strains and materials in the discharge tank 6 are pressed back into the stirring tank 2 to achieve cyclic inoculation.

[0023] Cross supports 9 are installed at the bottoms of both the stirring tank 2 and the discharge tank 6. The first vacuum pump 3 and the second vacuum pump 7 are respectively installed on the surfaces of the corresponding cross supports 9. The cross supports 9 provide a stable support structure for the first vacuum pump 3 and the second vacuum pump 7. During operation, the vacuum pumps will generate certain vibrations and noises. The cross supports 9 can effectively disperse these forces, prevent the vacuum pumps from being displaced or damaged due to vibration, ensure their long-term stable operation, reduce problems such as loosening of connecting components and pipeline rupture that may be caused by equipment shaking, and improve the stability and reliability of the entire system operation.

[0024] A protruding tank 10 is provided at the top of the fermentation tank 1, and the feed inlet 11 is opened on the side surface of the protruding tank 10. By opening the feed inlet 11 on its side surface, the central area at the top of the fermentation tank 1 can be used to install other key equipment, effectively utilizing the space at the top of the fermentation tank 1, avoiding the layout of the feed inlet 11 from affecting the installation of other equipment, and at the same time being beneficial to the compactness and rationality of the internal structure of the fermentation tank 1. Six support rods 12 are evenly installed at the top of the protruding tank 10, and a chuck 13 is fixedly installed at the top of the support rod 12. The other end of the chuck 13 is fixedly connected to the top of the feed pipe 14. This mechanism can fix the feed pipe 14, and the design of multiple feed inlets 11 on the side surface of the protruding tank 10 enables the material to enter the fermentation tank 1 in a decentralized manner.

[0025] The extension mechanism 15 includes an outer cover pipe 16, and the outer cover pipe 16 is rotatably installed on the outer surface of the protruding tank 10. Six side stoppers 21 are evenly installed at the top of the fermentation tank 1. The six side stoppers 21 are arranged alternately with the six feed pipes 14. The side stoppers 21 slide close to the surface of the outer cover pipe 16. The side stoppers 21 can not only play a positioning role for the feed pipe 14 and the outer cover pipe 16 to ensure a compact structure, but also prevent the outer cover pipe 16 from shaking or shifting during rotation, ensuring the stable operation of the entire extension mechanism 15, making the adjustment action of the extension pipe 18 accurate and reliable. Six path grooves 17 are evenly opened on the surface of the outer cover pipe 16. The path grooves 17 are integrally arranged in an inclined shape. An extension pipe 18 is movably sleeved on the outer surface of the feed pipe 14. The bottom of the extension pipe 18 is installed in the inner cavity of the fermentation tank 1. A movable column 19 is arranged on the surface of the extension pipe 18 near the top. The surface of the movable column 19 is movably clamped in the path groove 17. By rotating the outer cover pipe 16, since the path groove 17 is inclined, the movable column 19 slides in the path groove 17, so that the extension pipe 18 moves up and down along the feed pipe 14, and can flexibly change the position depth of the end of the feed pipe 14 in the fermentation tank 1. A drive assembly 20 is installed above the protruding tank 10, and the drive assembly 20 can drive the outer cover pipe 16 to rotate.

[0026] The drive assembly 20 includes an L-shaped bracket 23. The L-shaped bracket 23 is fixedly installed at the top of the protruding tank 10. A gear 25 is rotatably installed below the L-shaped bracket 23. A stepping motor 24 is installed at the top of the L-shaped bracket 23. The output end of the stepping motor 24 is connected to the gear 25. The top of the outer cover pipe 16 protrudes from the protruding tank 10. A rack 22 is arranged on the inner wall of the top of the outer cover pipe 16. The gear 25 meshes with the rack 22. By driving the gear 25 to rotate through the stepping motor 24, it meshes with the rack 22 on the top of the outer cover pipe 16, and then drives the outer cover pipe 16 to rotate. When the outer cover pipe 16 rotates, the inclined path groove 17 on its surface will guide the movable column 19 to move along a specific trajectory, so that the extension pipe 18 can move up and down regularly on the feed pipe 14.

[0027] The shielding mechanism 27 includes a cylindrical bar 28. The cylindrical bar 28 is fixedly installed at the top inside the fermentation tank 1, and the whole cylindrical bar 28 is arranged in an inclined shape. The bottom of the cylindrical bar 28 offsets towards the center of the fermentation tank 1. A side ring 26 is fixedly arranged at the bottom of the extension pipe 18. One end of the side ring 26 close to the cylindrical bar 28 is installed with a baffle 29 through a hinge. An arc-shaped guide block 31 is arranged on the surface of the baffle 29 close to the center of the fermentation tank 1. The other end of the baffle 29 is provided with an arc-shaped clamping block 30. The arc-shaped clamping block 30 is movably clamped on the surface of the cylindrical bar 28. A boss 32 is arranged on the inner wall of the side ring 26. The boss 32 corresponds to the bottom surface of the feeding pipe 14. The inclined cylindrical bar 28 and the matching arc-shaped clamping block 30 can guide the baffle 29 to a specific position. When the extension pipe 18 moves towards the bottom in the inner cavity of the fermentation tank 1, the inclined cylindrical bar 28 can squeeze the arc-shaped clamping block 30, making the bottom of the baffle 29 move towards the center of the fermentation tank 1, which can further prevent the material from splashing onto the inner wall of the fermentation tank 1. At the same time, the design of the arc-shaped guide block 31 can guide the incoming material to disperse along a specific path, so that the material can flow into the fermentation tank 1 at an arc angle, generating a forced swirl, reducing the bubbles generated when the material flows into the fermentation tank 1, and ensuring the smoothness of the whole feeding process.

[0028] Six discharge pipes 33 are vertically corresponding to six side stoppers 21. The discharge pipes 33 and the feeding pipe 14 are stagger-designed, which can effectively avoid the dead angle of material deposition and further reduce the probability of blockage.

[0029] Working principle: First, start the first vacuum pump 3 to send the materials from the mixing tank 2 into the feeding tank 4. For materials that are difficult to flow by gravity or have high viscosity, the first vacuum pump 3 can ensure smooth feeding. After the materials enter the feeding tank 4, start the first air pressure tank 5. Driven by air pressure, the materials inside the feeding tank 4 are sent into the fermentation tank 1 through the feeding pipe 14. The large conveying power provided by the air pressure can overcome the resistance of the materials flowing in the feeding pipe 14, ensuring that the materials reach the fermentation tank 1 quickly and in sufficient quantity. Then, the driving assembly 20 can drive the outer cover pipe 16 to rotate. Due to the inclined path groove 17, the movable column 19 slides in the path groove 17, so that the extension pipe 18 moves up and down along the feeding pipe 14, and can flexibly change the position depth of the end of the feeding pipe 14 in the fermentation tank 1. When the extension pipe 18 moves towards the bottom of the inner cavity of the fermentation tank 1, the inclined cylindrical bar 28 squeezes the arc-shaped block 30, causing the bottom of the baffle 29 to move towards the center of the fermentation tank 1, preventing the materials from splashing onto the inner wall of the fermentation tank 1. At the same time, the arc-shaped guide block 31 guides the incoming materials to disperse along a specific path, so that the materials flow into the fermentation tank 1 at an arc angle, generating a forced swirl, reducing the bubbles generated when the materials flow in, and ensuring a smooth feeding process. Subsequently, start the second vacuum pump 7 to suck out the air in the discharging tank 6 to form a negative pressure environment, and quickly suck the materials in the fermentation tank 1 into the discharging tank 6. After the materials enter the discharging tank 6, start the second air pressure tank 8, and the generated air pressure transports the strains and materials inside the discharging tank 6 to the mixing tank 2. Finally, in the mixing tank 2, the strains are stirred and inoculated with the new materials. After completion, the feeding process can be carried out again.

[0030] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A pneumatic multi-point upper-inlet and lower-outlet device, comprising a fermentation tank (1), characterized in that, On both sides of the fermentation tank (1), a feeding component and a discharging component are respectively installed. The feeding component is used to input materials into the fermentation tank (1), and the discharging component is used to discharge the materials inside the fermentation tank (1). Six feeding ports (11) are evenly arranged on the end face at the top of the fermentation tank (1). A feeding pipe (14) is installed inside the feeding port (11). The feeding component is connected to the fermentation tank (1) through six feeding pipes (14). Six discharging pipes (33) are evenly connected to the bottom of the fermentation tank (1). The discharging component is connected to the fermentation tank (1) through six discharging pipes (33). An extension mechanism (15) is arranged at the top of the fermentation tank (1), and the extension mechanism (15) is used to extend the end of the feeding pipe (14). Six shielding mechanisms (27) are evenly arranged inside the fermentation tank (1), and the shielding mechanisms (27) cooperate with the extension mechanism (15).

2. The pneumatic multi-point upper-inlet and lower-outlet device according to claim 1, wherein, The feeding component includes a stirring tank (2). A feeding tank (4) is arranged on the side of the stirring tank (2). A first air pressure tank (5) is arranged on the side of the feeding tank (4). A first vacuum pump (3) is arranged below the stirring tank (2). The materials are sent into the feeding tank (4) through the first vacuum pump (3), and then the materials inside the feeding tank (4) are sent into the fermentation tank (1) through the first air pressure tank (5).

3. The pneumatic multi-point upper-inlet and lower-outlet device according to claim 2, characterized in that, The discharging component includes a discharging tank (6). A second air pressure tank (8) is installed on the side of the discharging tank (6). A second vacuum pump (7) is arranged below the discharging tank (6). The air in the discharging tank (6) is sucked out through the second vacuum pump (7), and the bacteria in the fermentation tank (1) are sucked into the discharging tank (6), and then the bacteria inside the discharging tank (6) are transported to the stirring tank (2) through the second air pressure tank (8).

4. A pneumatic multi-point upper-inlet and lower-outlet device according to claim 3, characterized in that Cross brackets (9) are installed at the bottoms of both the stirring tank (2) and the discharging tank (6). The first vacuum pump (3) and the second vacuum pump (7) are respectively installed on the surfaces of the corresponding cross brackets (9).

5. A pneumatic multi-point upward feeding and downward discharging device according to claim 1, characterized in that, A protruding tank (10) is arranged at the top of the fermentation tank (1). The feeding port (11) is opened on the side of the protruding tank (10). Six support rods (12) are evenly installed on the top of the protruding tank (10). A chuck (13) is fixedly installed at the top of the support rod (12), and the other end of the chuck (13) is fixedly connected to the top of the feeding pipe (14).

6. The pneumatic multi-point upper-inlet and lower-outlet device according to claim 5, characterized in that, The extension mechanism (15) includes an outer cover tube (16) which is rotatably installed on the outer surface of the protruding tank (10). Six side stoppers (21) are evenly installed at the top of the fermentation tank (1). The six side stoppers (21) are arranged in an interleaved manner with the six feed pipes (14). The side stoppers (21) slide closely on the surface of the outer cover tube (16). Six path grooves (17) are evenly formed on the surface of the outer cover tube (16). The path grooves (17) are integrally arranged in an inclined shape. An extension tube (18) is movably sleeved on the outer surface of the feed pipe (14). The bottom of the extension tube (18) is installed in the inner cavity of the fermentation tank (1). An active column (19) is arranged on the surface of the extension tube (18) near the top. The surface of the active column (19) is movably clamped in the path grooves (17). A drive assembly (20) is installed above the protruding tank (10).

7. The pneumatic multi-point upward feeding and downward discharging device according to claim 6, characterized in that, The drive assembly (20) includes an L-shaped bracket (23) which is fixedly installed on the top of the protruding tank (10). A gear (25) is rotatably installed below the L-shaped bracket (23). A stepping motor (24) is installed on the top of the L-shaped bracket (23). The output end of the stepping motor (24) is connected to the gear (25). The top of the outer cover tube (16) protrudes from the protruding tank (10). A rack (22) is arranged on the inner wall of the top of the outer cover tube (16). The gear (25) meshes with the rack (22).

8. A pneumatic multi-point upper-inlet and lower-outlet device according to claim 6, characterized in that, The shielding mechanism (27) includes a cylindrical bar (28) which is fixedly installed at the top end inside the fermentation tank (1). The cylindrical bar (28) is integrally arranged in an inclined shape. The bottom of the cylindrical bar (28) deviates towards the center of the fermentation tank (1). A side ring (26) is fixedly arranged at the bottom of the extension tube (18). One end of the side ring (26) close to the cylindrical bar (28) is installed with a baffle (29) through a hinge. An arc-shaped guide block (31) is arranged on the surface of the baffle (29) close to the center of the fermentation tank (1). An arc-shaped clamping block (30) is arranged at the other end of the baffle (29). The arc-shaped clamping block (30) is movably clamped on the surface of the cylindrical bar (28). A boss (32) is arranged on the inner wall of the side ring (26). The boss (32) corresponds to the bottom surface of the feed pipe (14).

9. The pneumatic multi-point upper-inlet and lower-outlet device according to claim 6, characterized in that, The six discharge pipes (33) are vertically corresponding to the six side stoppers (21).

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