Mixing and fermenting device for feed production

Abstract

The invention discloses a mixing and fermentation device for feed production in the technical field of feed production, the mixing and fermentation device comprises a fermentation tank, a feeding device and an air exhaust assembly, the feeding device comprises a shell, a feeding port is formed in the bottom of the shell to be communicated with the fermentation tank, and a feeding port is formed in the top of the shell; the air exhaust assembly comprises a flexible belt arranged in the shell, the flexible belt is provided with an opening communicating with the feeding port and the feeding port, an air exhaust rod is arranged on the upper wall of the shell, one end of the air exhaust rod extends to the upper end of the shell, the other end of the air exhaust rod extends into the flexible belt and is used for pre-compressing raw materials to extrude out internal air, and a third driving part for driving the air exhaust rod to rotate is further arranged on the shell. A flexible bag is arranged for pre-storing the raw materials, then an air exhaust rod is arranged to stretch into the flexible bag for air exhaust, the air exhaust rod can be provided with a plurality of air exhaust points in a distributed mode, in cooperation with the tightening and compressing functions of the flexible bag, the air exhaust effect can be greatly improved, and a large amount of oxygen in gaps of the raw materials can be discharged easily; and the subsequent chemical oxygen removal cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of feed production, and more specifically to a mixing and fermentation apparatus for feed production. Background Technology

[0002] Traditional pig feed mainly uses corn, soybean meal, and peanut meal as raw materials. Although these can meet basic nutritional needs, they generally suffer from insufficient feed utilization. In some feed production processes, fermented products are used as feed ingredients to improve the utilization rate due to process formulation requirements. In existing technologies, Clostridium butyricum is a strictly anaerobic Gram-positive bacterium. In the field of pig feed, Clostridium butyricum is mainly applied to feed through direct addition or fermentation processes to improve the growth performance, intestinal health, and immunity of pigs.

[0003] During the fermentation of Clostridium butyricum, it needs to be added to a fermentation tank along with crushed plant stems, leaves, and straw. However, Clostridium butyricum is extremely sensitive to oxygen concentration. Current technologies often use methods such as negative pressure suction and inert gas replacement to remove most of the oxygen, and then use chemical agents to further remove residual oxygen in order to achieve an anaerobic environment suitable for Clostridium butyricum fermentation. However, since raw materials need to be added to the fermentation tank, a large amount of air is hidden in the loose gaps of the crushed plant stems, leaves, and straw. The poor air circulation in this part leads to a significant reduction in the efficiency of inert gas replacement. To compensate for this, the cost of chemical deoxygenation needs to be greatly increased. Summary of the Invention

[0004] The purpose of this invention is to provide a mixing and fermentation device for feed production, which solves the problem of a large amount of air being carried between raw materials in existing anaerobic fermentation processes.

[0005] The present invention achieves the above objectives through the following technical solutions: A mixing and fermentation device for feed production includes a fermentation tank, a feeding device, and an air extraction assembly. The feeding device includes a shell with a feeding port at the bottom to connect to the fermentation tank and a feeding inlet at the top. The air extraction assembly includes a flexible bag disposed inside the housing. The flexible bag has an opening connecting the feeding port and the inlet. An air extraction rod is disposed on the upper wall of the housing. One end of the air extraction rod extends to the upper end of the housing, and the other end extends into the flexible bag. It is used to pre-compress the raw material and squeeze out the internal air. The housing is also provided with a third driving part for driving the air extraction rod to rotate, which is used to disperse the compressed raw material.

[0006] As a preferred embodiment of the present invention, the fermenter includes a tank body, a discharge port at the bottom of the tank body, and a first driving unit for stirring at the upper end. The output shaft of the first driving unit is provided with a stirring rod extending into the tank body. This embodiment is the prior art of fermenters. It is not mentioned that the prior art fermenters also have a temperature control device, a pH adjustment device, an oxygen concentration detection device, a pressure adjustment device, etc.

[0007] As a preferred embodiment of the present invention, a cover-type valve is provided inside the feeding port. The valve is driven to rotate and open / close by a second driving part provided outside the feeding port. By providing such a valve, the present invention has a good sealing effect when fully closed and facilitates the opening and closing of the valve to add materials to the fermentation tank.

[0008] In a preferred embodiment of the present invention, the portion of the suction rod extending into the flexible bag is provided with an elastic strip. Both the suction rod and the elastic strip are hollow and have air holes on their surfaces for suction. The elastic strip is distributed on both sides of the suction rod. By setting the suction rod and the elastic strip, this solution distributes the negative pressure points for suction in various corners of the flexible bag. The multi-point negative pressure adsorption, combined with the contraction of the flexible bag, greatly reduces the suction stroke, thereby reducing the difficulty of suction and improving the suction effect on the gas between raw materials. During subsequent feeding, the elastic strip can be used to break up the compressed and compacted raw materials by whipping. The elastic material can be used in the flexible bag.

[0009] In a preferred embodiment of the present invention, an adsorption head is provided at one end of the suction rod extending outside the housing. A docking seat is provided on the upper surface of the housing, and a negative pressure groove is provided on the lower surface of the docking seat for adsorbing the adsorption head. The negative pressure groove is connected to a negative pressure generating device, which is used to lift the adsorption head and raise the suction rod when suction is performed, and to disconnect the contact when suction is not performed to prevent affecting the rotation of the suction rod. In this embodiment, the suction rod has both negative pressure suction and rotation functions. In order to prevent the negative pressure device from affecting the rotating structure, and the rotating structure from affecting the negative pressure sealing, this embodiment sets a negative pressure docking interface. When negative pressure suction is not performed, there is no contact and the rotation is not affected. When negative pressure suction is performed, the airtightness is maintained by negative pressure.

[0010] As a preferred embodiment of the present invention, a driven gear is provided at the end of the suction rod near the adsorption head, and a drive gear that can slide axially with the driven gear is provided at the output shaft end of the third drive unit. The present invention further provides a rotary drive device that adapts to the axial sliding of the suction rod.

[0011] As a preferred embodiment of the present invention, the upper wall of the housing is provided with a connecting sleeve, and at least two bearings are provided inside the connecting sleeve. The outer ring of the bearing is slidably connected to the connecting sleeve, and the inner ring is fixedly connected to the suction rod. A sealing bushing is also provided on the suction rod for sealing and movable connection with the connecting sleeve. This embodiment uses two bearings to bear the load and a sealing sleeve is provided between the two bearings to maintain the sealing effect inside the flexible bag.

[0012] As a preferred embodiment of the present invention, the housing is further provided with a pair of sealing devices for squeezing and sealing the upper end of the flexible bag. The sealing device includes a telescopic drive unit and a connecting frame provided at the output end of the telescopic drive unit. The connecting frame is provided with a pair of pressing and smoothing belts, which are used to smooth and press the flexible bag to both sides. Each pressing and smoothing belt is supported by at least two guide wheels provided on the connecting frame, and at least one of the guide wheels is provided with a fourth drive unit for driving the pressing and smoothing belt to smooth. In order to make the flexible bag better fit the material for pre-compression and degassing, the sealing device is provided on the upper part of the flexible bag, and the bag is sealed by smoothing and squeezing.

[0013] As a preferred embodiment of the present invention, the cross-sectional shape of the suction rod and the sealing device at the corresponding heights is adapted to the gap at the intersection of the pressing and smoothing belt.

[0014] The beneficial effects of this invention are as follows: by setting up a flexible bag to pre-store raw materials, and then setting up an air extraction rod to insert into the flexible bag for air extraction, the air extraction rod can be set up with multiple air extraction points. Combined with the tightening and compression function of the flexible bag, the air extraction effect can be greatly improved, which helps to remove a large amount of oxygen in the gaps between the raw materials and reduces the cost of subsequent chemical deoxygenation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a front sectional view of the feeding device of the present invention; Figure 3 This is a side sectional view of the feeding device of the present invention; Figure 4 For the present invention Figure 2 Enlarged view of the structure of section A in the middle; Figure 5 For the present invention Figure 3 Enlarged view of the structure of section B; Figure 6 For the present invention Figure 3 C-axis view; In the diagram: 1. Fermentation tank; 11. Tank body; 12. Stirring rod; 13. First drive unit; 2. Feeding device; 21. Shell; 22. Feeding port; 23. Valve; 24. Second drive unit; 25. Feed inlet; 26. Air inlet; 27. Connecting sleeve; 3. Vacuum assembly; 31. Flexible bag; 32. Vacuum rod; 33. Elastic strip; 34. Air hole; 35. Driven gear; 36. Third drive unit; 37. Drive gear; 38. Adsorption head; 39. Docking seat; 310. Negative pressure groove; 311. Negative pressure generating device; 312. Bearing; 313. Sealing bushing; 4. Sealing device; 41. Telescopic drive unit; 42. Connecting frame; 43. Guide wheel; 44. Pressing and smoothing belt; 45. Fourth drive unit. Detailed Implementation

[0016] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0017] Example 1 like Figure 1-6 As shown, a mixing and fermentation device for feed production includes a fermentation tank 1, a feeding device 2, and an air extraction component 3. The feeding device 2 includes a housing 21, with a feeding port 22 at the bottom of the housing 21 to connect to the fermentation tank 1 and a feeding inlet 25 at the top. The air extraction assembly 3 includes a flexible bag 31 disposed inside the housing 21. The flexible bag 31 has an opening that connects the feeding port 22 and the inlet port 25. An air extraction rod 32 is disposed on the upper wall of the housing 21. One end of the air extraction rod 32 extends to the upper end of the housing 21, and the other end extends into the flexible bag 31. It is used to pre-compress the raw material and squeeze out the internal air. A third driving part 36 is also disposed on the housing 21 to drive the air extraction rod 32 to rotate, which is used to break up the compressed raw material.

[0018] This solution involves pre-storing raw materials in a flexible bag 31, and then using a suction rod 32 inserted into the flexible bag 31 to extract air. The suction rod 32 can be set with multiple suction points, which, together with the tightening and compression function of the flexible bag 31, can greatly improve the suction effect, help to remove a large amount of oxygen from the gaps between the raw materials, and reduce the cost of subsequent chemical deoxygenation.

[0019] Fermentation tank 1 includes a tank body 11, with a discharge port at the bottom and a first drive unit 13 for stirring at the top. The output shaft of the first drive unit 13 is provided with a stirring rod 12 extending into the tank body 11. This solution is the prior art of fermentation tank 1. What is not mentioned is that in the prior art, fermentation tank 1 also has a temperature control device, a pH adjustment device, an oxygen concentration detection device, a pressure adjustment device, etc.

[0020] Furthermore, in this embodiment, a cover-type valve 23 is provided inside the feeding port 22. The valve 23 is driven to rotate and open and close by a second drive unit 24 located outside the feeding port 22. By providing this valve 23, it has a good sealing effect when fully closed, and it is convenient to open and close to add materials to the fermentation tank 1.

[0021] As an improved implementation, the portion of the suction rod 32 extending into the flexible bag 31 is provided with an elastic strip 33. Both the suction rod 32 and the elastic strip 33 are hollow and have air holes 34 for suction on their surfaces. The elastic strip 33 is distributed on both sides of the suction rod 32. In this embodiment, by setting the suction rod 32 and the elastic strip 33, the negative pressure air holes 34 for suction are distributed in various corners of the flexible bag 31. Multi-point negative pressure adsorption, combined with the contraction of the flexible bag 31, greatly reduces the suction stroke, thereby reducing the difficulty of suction and improving the suction effect on the gas between raw materials. During subsequent feeding, the elastic strip 33 can be used to break up the compressed and clumped raw materials by whipping. It is made of elastic material and can be used in the flexible bag 31. It should be noted that a fine filter screen should be provided on the surface of the air hole 34 to prevent raw materials from being sucked in.

[0022] Please see Figure 3-4 In this embodiment, an adsorption head 38 is provided at one end of the suction rod 32 extending outside the housing 21. A docking seat 39 is provided on the upper surface of the housing 21, and a negative pressure groove 310 is provided on the lower surface of the docking seat 39 for adsorbing the adsorption head 38. The negative pressure groove 310 is connected to a negative pressure generating device 311, which is used to lift the adsorption head 38 and raise the suction rod 32 when suction is performed, and to disengage when suction is not performed to prevent affecting the rotation of the suction rod 32. The suction rod 32 has both negative pressure suction and rotation functions. In order to prevent the negative pressure device from affecting the rotating structure, which in turn affects the negative pressure sealing, a driven gear 35 is provided at the end of the suction rod 32 near the adsorption head 38, and a drive gear 37 that can slide axially with the driven gear 35 is provided at the output shaft end of the third drive unit 36.

[0023] This solution uses a negative pressure interface to ensure no contact when not performing negative pressure suction, thus not affecting rotation. During negative pressure suction, airtightness is maintained through negative pressure. The negative pressure groove 310 and the suction head 38 are designed as frustums. When air is drawn into the negative pressure groove 310, a large amount of airflow enters from the gap between the frustums, and the resulting suction pressure lifts the suction head 38 and presses it into the negative pressure groove 310. It should be noted that the size of the suction head 38 and the negative pressure groove 310 should be set as needed to ensure sufficient negative pressure to lift the suction rod 32. In addition, to prevent external air from entering the flexible bag 31 when the negative pressure groove 310 and the suction head 38 are disconnected, a one-way valve should be installed on the suction rod 32 to allow air to be drawn out only, preventing air from flowing back from the suction rod 32.

[0024] In implementation, the connection between the housing 21 and the suction rod 32 needs to be sealed. Therefore, in this embodiment, the upper wall of the housing 21 is provided with a connecting sleeve 27, and at least two bearings 312 are provided inside the connecting sleeve 27. The outer ring of the bearing 312 is slidably connected to the connecting sleeve 27, and the inner ring is fixedly connected to the suction rod 32. The suction rod 32 is also provided with a sealing bushing 313 for sealing and movable connection with the connecting sleeve 27. In this embodiment, two bearings 312 are provided to bear the load, and a sealing bushing 313 is provided between the two bearings 312 to maintain the sealing effect inside the flexible bag 31. It should be noted that when there is no negative pressure in the negative pressure groove 310, the suction rod 32 falls. The falling stroke is small, and the outer ring of the bearing 312 falls to the lowest position to bear the load.

[0025] When in use, since the upper part of the flexible bag 31 is connected to the shell 21 and cannot shrink, this results in the upper part of the flexible bag 31 not being filled with material and lacking effective shrinkage under negative pressure. To solve this problem, this embodiment is further improved as follows: a pair of sealing devices 4 for squeezing and sealing the upper end of the flexible bag 31 are also provided inside the shell 21. The sealing device 4 includes a telescopic drive part 41 and a connecting frame 42 provided at the output end of the telescopic drive part 41. A pair of pressing and smoothing belts 44 are provided on the connecting frame 42, which are used to smooth and press the flexible bag 31 to both sides. Each pressing and smoothing belt 44 is supported by at least two guide wheels 43 provided on the connecting frame 42, and at least one of the guide wheels 43 is provided with a fourth drive part 45 for driving the pressing and smoothing belt 44 to smooth. In order to make the flexible bag 31 better fit the material for pre-compression and degassing, the sealing device 4 is provided on the upper part of the flexible bag 31 and the sealing is performed by smoothing and squeezing.

[0026] The cross-sectional shape of the suction rod 32 at the corresponding height of the sealing device 4 is adapted to the gap at the intersection of the pressing and smoothing band 44.

[0027] The negative pressure generating device 311 is activated, first sucking up the suction rod 32, adding crushed plant materials into the flexible bag 31 through the feed inlet 25, then closing the feed inlet 25, the sealing device 4 clamps the upper end of the flexible bag 31 and smooths it to both sides, the flexible bag 31 shrinks, and the gas between the plant materials is extracted. After extraction, the negative pressure generating device 311 stops, the sealing device 4 resets, the suction rod 32 falls, and inert gas is introduced into the flexible bag 31 to open it. Nitrogen is added through the air inlet 26 set on the shell 21. After the flexible bag 31 is opened, the suction rod 32 is driven to rotate through the third drive unit 36 ​​to disperse the clumped material. After the material disperses, nitrogen is filled into the gaps, and then the valve 23 is opened to discharge the material and nitrogen into the fermentation tank 1 for fermentation.

[0028] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A mixing and fermentation apparatus for feed production, characterized in that, It includes a fermenter (1), a feeding device (2) and an air extraction assembly (3), wherein the feeding device (2) includes a housing (21), the bottom of the housing (21) is provided with a feeding port (22) to connect to the fermenter (1), and the top is provided with a feeding port (25); The air extraction assembly (3) includes a flexible bag (31) disposed inside the housing (21). The flexible bag (31) has an opening that connects the feeding port (22) and the inlet (25). An air extraction rod (32) is provided on the upper wall of the housing (21). One end of the air extraction rod (32) extends to the upper end of the housing (21), and the other end extends into the flexible bag (31) for pre-compressing the raw material and squeezing out the internal air. A third driving part (36) is also provided on the housing (21) to drive the air extraction rod (32) to rotate, for dispersing the compressed raw material.

2. The mixing and fermentation apparatus for feed production according to claim 1, characterized in that, The fermentation tank (1) includes a tank body (11), the bottom of the tank body (11) is provided with a discharge port, and the upper end is provided with a first drive unit (13) for stirring. The output shaft of the first drive unit (13) is provided with a stirring rod (12) extending into the tank body (11).

3. The mixing and fermentation apparatus for feed production according to claim 1, characterized in that, The feed port (22) is equipped with a cover-type valve (23), which is driven to rotate and open and close by a second drive unit (24) located outside the feed port (22).

4. The mixing and fermentation apparatus for feed production according to claim 1, characterized in that, The portion of the suction rod (32) extending into the flexible bag (31) is provided with an elastic strip (33). Both the suction rod (32) and the elastic strip (33) are hollow and have air holes (34) for suction on their surfaces. The elastic strip (33) is distributed on both sides of the suction rod (32).

5. The mixing and fermentation apparatus for feed production according to claim 1, characterized in that, The suction rod (32) extends to the outside of the housing (21) and is provided with an adsorption head (38). The upper surface of the housing (21) is provided with a docking seat (39). The lower surface of the docking seat (39) is provided with a negative pressure groove (310) for adsorbing the adsorption head (38). The negative pressure groove (310) is connected to a negative pressure generating device (311) for adsorbing the adsorption head (38) and lifting the suction rod (32) when suctioning air, and disengaging from contact when not suctioning air to prevent affecting the rotation of the suction rod (32).

6. The mixing and fermentation apparatus for feed production according to claim 5, characterized in that, The suction rod (32) is provided with a driven gear (35) at one end near the suction head (38), and the output shaft end of the third drive unit (36) is provided with a drive gear (37) that can slide axially with the driven gear (35).

7. The mixing and fermentation apparatus for feed production according to claim 5, characterized in that, The upper wall of the housing (21) is provided with a connecting sleeve (27), and at least two bearings (312) are provided inside the connecting sleeve (27). The outer ring of the bearing (312) is slidably connected to the connecting sleeve (27), and the inner ring is fixedly connected to the suction rod (32). A sealing bushing (313) is also provided on the suction rod (32) for sealing and movable connection with the connecting sleeve (27).

8. The mixing and fermentation apparatus for feed production according to claim 1, characterized in that, The housing (21) is also provided with a pair of sealing devices (4) for squeezing and sealing the upper end of the flexible bag (31). The sealing device (4) includes a telescopic drive unit (41) and a connecting frame (42) provided at the output end of the telescopic drive unit (41). The connecting frame (42) is provided with a pair of pressing and smoothing belts (44) for smoothing and pressing the flexible bag (31) to both sides. Each pressing and smoothing belt (44) is supported by at least two guide wheels (43) provided on the connecting frame (42), and at least one of the guide wheels (43) is provided with a fourth drive unit (45) for driving the pressing and smoothing belt (44) to smooth.

9. A mixing and fermentation apparatus for feed production according to claim 8, characterized in that, The cross-sectional shape of the suction rod (32) and the sealing device (4) at the corresponding heights is adapted to the gap at the intersection of the pressing and smoothing strip (44).

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