Feed mixing machine

Abstract

The feed mixing machine comprises a feed barrel, a discharge port is formed in the left side of the inner bottom of the feed barrel, the lower end of the feed barrel is fixedly connected with an installation base, a support is installed at the lower end of the installation base, a sealing cover is installed at the upper end of the feed barrel, one side of the sealing cover is hinged to the upper end of the feed barrel, and the other side of the sealing cover is hinged to the lower end of the feed barrel. The other side of the sealing cover is clamped with the material barrel through a buckle; the mixing mechanism comprises a driving motor mounted at the top in the mounting base, the driving motor is a double-shaft motor, a speed reducer is mounted on an output shaft at the upper end of the driving motor, and the output end of the speed reducer extends into the charging basket and is fixedly connected with a rotating shaft. According to the mixing machine, when feed is mixed, the feed can be promoted to flow, and clotted feed can be screened out and crushed during mixing operation; and during discharging and mixing, the situation of dust diffusion can be avoided.

Description

Technical Field

[0001] The present invention relates to the field of feed mixing, and particularly to a feed mixer. Background Art

[0002] In the field of crop production, chemical-free production has become an important development trend, and biological control using natural enemy insects is one of the key means to achieve this goal. Therefore, the research on insects and natural enemy insects is crucial, such as corn borers, armyworms, cotton bollworms, etc. During the process of cultivating these insects, it is crucial to provide suitable active feed to ensure the healthy growth, high survival rate, and good quality of the insects.

[0003] In feed processing, a feed mixer is an indispensable key equipment, and its performance directly affects the quality, production efficiency, and convenience of use of feed products.

[0004] During the storage and transportation of feed raw materials, due to factors such as moisture absorption and static electricity, caking is likely to occur. When these caked feeds enter a traditional mixer, due to the lack of an effective crushing device, the caked feeds cannot be timely broken up and remixed, and the different raw materials inside the caked feeds are difficult to fully blend with other supporting feeds, resulting in poor uniformity of the mixed feed. In addition, during the mixing process, due to the continuous turning and stirring of the raw materials, a large amount of dust is also generated, which will cause serious harm to human health. Long-term inhalation of dust will lead to respiratory diseases, lung diseases, etc. Summary of the Invention

[0005] The purpose of the present invention is to solve the deficiencies existing in the prior art, and a feed mixer is proposed. When the feed is mixed, the mixer can promote the flow of the feed, making the mixing effect better to ensure the quality and uniformity of the nutritional components of the feed. In addition, during the mixing operation, the caked feeds can be screened out and crushed, and at the same time, dust diffusion can be avoided during both discharging and mixing.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions: A feed mixer, comprising a feed barrel, a discharge port is arranged on the left side of the inner bottom of the feed barrel, the lower end of the feed barrel is fixedly connected to an installation base, a support is installed at the lower end of the installation base, a sealing cover is installed at the upper end of the feed barrel, one side of the sealing cover is hinged to the upper end of the feed barrel, and the other side of the sealing cover is snap-connected to the feed barrel through a buckle; a mixing mechanism, the mixing mechanism includes a driving motor installed at the inner top of the installation base, the driving motor is a double-shaft motor, a speed reducer is installed on the upper output shaft of the driving motor, the output end of the speed reducer extends into the feed barrel and is fixedly connected to a rotating shaft, a plurality of stirring blades are fixedly connected to the outer side of the rotating shaft, a plurality of the stirring blades are all inclined, and the lower end surfaces of a plurality of the stirring blades are all in contact with the inner bottom of the feed barrel; a screening mechanism, the screening mechanism is used for screening the agglomerated particles in the feed and crushing them; a gas movement mechanism, the gas movement mechanism is used to promote the mixing of feed particles and can avoid dust escape during the discharging operation.

[0007] Preferably, a sealing door is installed on the front side of the installation base, and a plurality of heat dissipation holes are opened on the rear side wall of the installation base.

[0008] Preferably, an installation frame is fixedly connected to the right side of the installation base, and a controller is installed at the upper end of the installation frame.

[0009] Preferably, the screening mechanism includes a lifting cylinder vertically arranged inside the feed barrel, two connecting frames are fixedly connected to the outer wall of the lifting cylinder, the other ends of the two connecting frames are both fixedly connected to the inner wall of the feed barrel, the upper end of the rotating shaft penetrates through the lifting cylinder, and a spiral blade is installed inside the lifting cylinder on the rotating shaft.

[0010] Preferably, a rotating cylinder is sleeved on the outer side of the upper part of the lifting cylinder, an inclined filter disc is fixedly connected to the outer wall of the rotating cylinder, the outer side of the inclined filter disc is fixedly connected to the rotating shaft through two fixing strips, and a plurality of sorting holes are opened on the inclined filter disc.

[0011] Preferably, two fixing rods are symmetrically and fixedly connected to the inner top space inner wall of the feed barrel, an extrusion ring is fixedly connected to the opposite ends of the two fixing rods, a diversion ring is fixedly connected to the outer side of the upper end of the rotating cylinder, and the outer side surface of the diversion ring is in an inclined shape and is matched with the extrusion ring.

[0012] Preferably, the gas movement mechanism includes an annular cavity opened inside the feed barrel. A plurality of connection ports are opened on the inner wall of the annular cavity. A piston cylinder is fixedly connected to the right side wall of the mounting base. A piston plate that can slide left and right is arranged inside the piston cylinder. The lower output shaft of the driving motor is fixedly connected to a rotating disk. An eccentric part at the lower end of the rotating disk is rotatably connected to a connecting rod. The other end of the connecting rod is rotatably connected to the left side of the piston plate. The right side space of the piston cylinder is communicated with the inside of the annular cavity through a communicating pipe.

[0013] Preferably, a filter box is installed on the right side wall of the mounting base. A filter screen is installed inside the filter box. The rear side space of the filter box is communicated with the right side space of the piston cylinder through a one-way pipe. The front side space of the filter box is communicated with the front side space of the annular cavity through a connecting pipe. The right side space of the piston cylinder is communicated with the outside through a one-way port. One-way valves are installed inside both the one-way pipe and the one-way port. The flow direction of the one-way valve inside the one-way pipe is from the filter box into the piston cylinder unidirectionally. The flow direction of the one-way valve inside the one-way port is from the piston cylinder to the outside unidirectionally.

[0014] Preferably, solenoid valves are installed inside the communicating pipe, the one-way port, and the one-way pipe. The controller is used to control the driving motor and the plurality of solenoid valves.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This feed mixer tumbles and stirs the materials through the inclined stirring blades, making the feed have good fluidity, enabling the feed raw materials to fully flow and mix inside the housing, significantly improving the mixing uniformity, ensuring the balanced distribution of feed nutritional components, improving the quality of feed products, and providing guarantee for the research and cultivation of insects and natural enemy insects.

[0016] During the mixing process, the reciprocating movement of the piston plate in the piston cylinder causes the air in the right side space of the piston cylinder to reciprocally exchange with the annular cavity. The air volume in the annular cavity reciprocally increases and decreases. Finally, airflows are reciprocally blown out and inhaled at the plurality of connection ports. This reciprocating airflow can make the feed fed from the top fall more dispersedly to the bottom of the feed barrel, further promoting the dispersion and mixing of feed particles and improving the mixing efficiency.

[0017] 3. The inclined filter disk and extrusion ring structures are set up to separate the agglomerated particles by centrifugal force and throw them to a specific position for grinding and crushing, effectively solving the problem that traditional mixers cannot handle agglomerated feed, avoiding the influence of agglomeration on the mixing effect and the uniformity of nutritional components, and improving the subsequent production efficiency and equipment stability.

[0018] 4. During the feeding and discharging stages, with the help of the gas movement mechanism to generate a one-way airflow, the diffused dust is inhaled into the feed barrel, avoiding dust flying and polluting the environment. At the same time, the reusable dust is collected, reducing raw material waste, protecting the health of operators, and meeting the requirements of environmental protection production.

[0019] 5. When the drive motor rotates in the reverse direction, the rotation mode of the stirring blade changes, and the material moves eccentrically under the centrifugal force towards the discharge port, achieving full discharge, improving the discharge efficiency, and enhancing the overall production efficiency.

[0020] In summary, during the actual use of this mixer, the actual mixing efficiency is effectively improved, thereby enhancing the overall production efficiency. Additionally, it can handle agglomeration, ensure the quality and uniformity of the nutritional components of the finished feed, and avoid the occurrence of dust flying and environmental pollution. Brief Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of a feed mixer proposed by the present invention; Figure 2 It is Figure 1 A schematic cross-sectional view at the filter box; Figure 3 It is Figure 2 A front structural diagram of Figure 4 It is Figure 1 A middle cross-sectional view of Figure 5 It is Figure 4 An enlarged view of part A of In the figure: 1, material barrel; 2, discharge port; 3, mounting base; 4, support; 5, sealing door; 6, mounting frame; 7, sealing cover; 8, connecting pipe; 9, annular cavity; 10, connection port; 11, connecting frame; 12, lifting cylinder; 13, drive motor; 14, rotating disk; 15, filter box; 16, communicating pipe; 17, one-way port; 18, fixed rod; 19, extrusion ring; 20, rotating shaft; 21, spiral blade; 22, stirring blade; 23, rotating cylinder; 24, fixed strip; 25, inclined filter disk; 26, guide ring; 27, controller; 28, buckle; 29, heat dissipation hole; 30, piston cylinder; 31, piston plate; 32, connecting rod; 33, one-way pipe. Detailed Embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0023] Refer to Figures 1 - 5, a feed mixer, including a feed barrel 1, a discharge port 2 is arranged on the left side of the inner bottom of the feed barrel 1, a sealing structure is arranged at the discharge port 2, and the sealing structure is only opened when discharging. A weighing element can also be installed on the inner bottom of the feed barrel 1 for realizing quantitative feeding. The lower end of the feed barrel 1 is fixedly connected to a mounting base 3, a support 4 is installed at the lower end of the mounting base 3, a sealing cover 7 is installed at the upper end of the feed barrel 1, one side of the sealing cover 7 is hinged to the upper end of the feed barrel 1, and the other side of the sealing cover 7 is snap-connected to the feed barrel 1 through a buckle 28.

[0024] As an implementation manner of the present invention, it further includes a mixing mechanism. The mixing mechanism includes a driving motor 13 installed at the inner top of the mounting base 3. The driving motor 13 is a double-shaft motor. A speed reducer is installed on the upper output shaft of the driving motor 13. The output end of the speed reducer extends into the interior of the feed barrel 1 and is fixedly connected to a rotating shaft 20. A plurality of stirring blades 22 are fixedly connected to the outer side of the rotating shaft 20. The plurality of stirring blades 22 are all inclined. A vertical blade can also be arranged on the outer side of each stirring blade 22. The lower end surfaces of the plurality of stirring blades 22 are all in contact with the inner bottom of the feed barrel 1. The stirring blade 22 is made of a soft scraping plate and is in flexible contact with the inner bottom of the feed barrel 1. Further, when stirring forward, the material will move upward along the blade in an inclined manner to promote turning. When stirring in the reverse direction, the material will be pressed below the blade. When rotating in the reverse direction at a relatively high speed, this structure can promote the material to do eccentric motion under the influence of centrifugal force, facilitating full discharge. A sealing door 5 is installed on the front side of the mounting base 3, and a plurality of heat dissipation holes 29 are opened on the rear side wall of the mounting base 3.

[0025] As an implementation manner of the present invention, it further includes a screening mechanism. The screening mechanism is used for screening the agglomerated particles in the feed and crushing them. Specifically, the screening mechanism includes a lifting cylinder 12 vertically arranged inside the feed barrel 1. Two connecting frames 11 are fixedly connected to the outer wall of the lifting cylinder 12. The other ends of the two connecting frames 11 are both fixedly connected to the inner wall of the feed barrel 1. The upper end of the rotating shaft 20 penetrates through the lifting cylinder 12. A spiral blade 21 is installed inside the lifting cylinder 12 where the rotating shaft 20 is located. When rotating forward, the spiral blade 21 can lift the material upward. A rotating cylinder 23 is sleeved on the outer side of the upper part of the lifting cylinder 12. An inclined filter plate 25 is fixedly connected to the outer wall of the rotating cylinder 23. The outer side of the inclined filter plate 25 is fixedly connected to the rotating shaft 20 through two fixing strips 24. A plurality of sorting holes are opened on the inclined filter plate 25.

[0026] As an implementation manner of the present invention, two fixing rods 18 are symmetrically and fixedly connected to the inner top space inner wall of the feed barrel 1. A pressing ring 19 is fixedly connected to the opposite ends of the two fixing rods 18. A guide ring 26 is fixedly connected to the outer side of the upper end of the rotating cylinder 23. The outer side surface of the guide ring 26 is in an inclined shape and is matched with the pressing ring 19, as Figure 4As shown, when the larger agglomerated particles are thrown to the position between the diversion ring 26 and the extrusion ring 19, due to the distance between the two decreasing successively from top to bottom, under the action of rotational friction, a grinding-like effect can be achieved to break the agglomerated materials. Further, in this solution, friction patterns can be provided on the opposite surfaces of the diversion ring 26 and the extrusion ring 19 to achieve a better crushing effect.

[0027] As an implementation manner of the present invention, it further includes a gas movement mechanism for promoting the mixing of feed particles and avoiding dust escape during the discharging operation. The gas movement mechanism includes an annular cavity 9 opened inside the feed barrel 1. A plurality of connection ports 10 are opened on the inner wall of the annular cavity 9. A piston cylinder 30 is fixedly connected to the right side wall of the mounting base 3. A piston plate 31 that can slide left and right is arranged inside the piston cylinder 30. The lower output shaft of the driving motor 13 is fixedly connected to a rotating disk 14. An eccentric part at the lower end of the rotating disk 14 is rotatably connected to a connecting rod 32. The other end of the connecting rod 32 is rotatably connected to the left side of the piston plate 31. The right side space of the piston cylinder 30 is communicated with the inside of the annular cavity 9 through a connecting pipe 16.

[0028] As an implementation manner of the present invention, a filter box 15 is installed on the right side wall of the mounting base 3. A filter screen is installed inside the filter box 15. The rear side space of the filter box 15 is communicated with the right side space of the piston cylinder 30 through a one-way pipe 33. The front side space of the filter box 15 is communicated with the front side space of the annular cavity 9 through a connecting pipe 8. The right side space of the piston cylinder 30 is communicated with the outside through a one-way port 17. One-way valves are installed inside both the one-way pipe 33 and the one-way port 17. The flow direction of the one-way valve inside the one-way pipe 33 is from the filter box 15 into the piston cylinder 30 unidirectionally, and the flow direction of the one-way valve inside the one-way port 17 is from the piston cylinder 30 to the outside unidirectionally.

[0029] As an implementation manner of the present invention, a mounting frame 6 is fixedly connected to the right side of the mounting base 3. A controller 27 is installed at the upper end of the mounting frame 6. Electromagnetic valves are installed inside the connecting pipe 16, the one-way port 17, and the one-way pipe 33. The controller 27 is used to control the driving motor 13 and multiple electromagnetic valves. During feeding, the driving motor 13 will be started immediately. At this time, the electromagnetic valves inside the one-way pipe 33 and the one-way port 17 are started, while the electromagnetic valve inside the connecting pipe 16 is closed. During the mixing process, the electromagnetic valves inside the one-way pipe 33 and the one-way port 17 are closed, while the electromagnetic valve inside the connecting pipe 16 is opened. During discharging, the electromagnetic valves inside the one-way pipe 33 and the one-way port 17 are started, while the electromagnetic valve inside the connecting pipe 16 is closed.

[0030] In the present invention, the operator first opens the sealing cover 7 at the upper end of the feed barrel 1 and puts various feed raw materials to be mixed into the interior of the feed barrel 1. At this time, the sealing structure at the discharge port 2 is in a closed state to ensure that there is no feed leakage during the feeding process. When feeding, the controller 27 controls the driving motor 13 to start, and at the same time controls the solenoid valves in the one-way pipe 33 and the one-way port 17 to open, and the solenoid valve in the connecting pipe 16 to close. The lower output shaft of the driving motor 13 drives the rotating disk 14 to rotate, and the rotating disk 14 drives the piston plate 31 in the piston cylinder 30 to make a reciprocating left and right movement through the connecting rod 32 at the eccentric position. Cooperating with the one-way valves inside the one-way pipe 33 and the one-way port 17, a one-way gas flow can be generated among the interior of the feed barrel 1, the annular cavity 9, the filter box 15, the piston cylinder 30 and the outside. This gas flow can suck out the air inside the feed barrel 1, and when the gas inside the feed barrel 1 is washed away, gas will be supplemented through the feeding part, that is, a one-way air flow among the outside, the feeding part and the interior of the feed barrel 1 is completed. This air flow can suck the diffused dust into the interior of the feed barrel 1 to avoid dust flying during feeding; After the feeding is completed, the sealing cover 7 is closed. The controller 27 controls the solenoid valves in the one-way pipe 33 and the one-way port 17 to close, and the solenoid valve in the connecting pipe 16 to open. The driving motor 13 continues to operate, and its upper output shaft drives the rotating shaft 20 to rotate. The multiple stirring blades 22 inclinedly arranged on the rotating shaft 20 rotate accordingly. During the rotation of the stirring blades 22, the feed is turned over and stirred to promote the flow of the feed in the feed barrel 1, so that various feed raw materials are fully mixed. At the same time, the spiral blade 21 inside the lifting cylinder 12 on the rotating shaft 20 also rotates with the rotating shaft 20, lifting the feed at the bottom of the feed barrel 1 upward and then finally falling back to the bottom of the feed barrel 1 again to make the feed move further and further improve the mixing effect of the feed; During the mixing process, since the solenoid valve in the connecting pipe 16 is open, the reciprocating movement of the piston plate 31 in the piston cylinder 30 causes the air in the right space of the piston cylinder 30 to reciprocally exchange with the annular cavity 9, and the air volume in the annular cavity 9 reciprocally increases and decreases. Finally, a reciprocating blowing and sucking air flow is generated at the multiple connecting ports 10. This reciprocating air flow can make the feed falling from the top more dispersed and fall to the bottom of the feed barrel 1, further promoting the dispersion and mixing of the feed particles and improving the mixing efficiency; It should be noted that when the lifted feed is lifted to the inclined filter disk 25, under the action of the centrifugal force generated by the rotation of the inclined filter disk 25, the unclumped feed passes through the sorting holes and falls, while the clumped particles will be thrown to the position between the diversion ring 26 and the extrusion ring 19 under the action of the centrifugal force. Since the outer side surface of the diversion ring 26 is inclined and cooperates with the extrusion ring 19, and the distance between the two decreases sequentially from top to bottom, the clumped particles are gradually broken under the action of rotational friction, similar to a grinding effect. In order to further improve the crushing effect, friction lines can be provided on the opposite surfaces of the diversion ring 26 and the extrusion ring 19. The crushed feed particles fall back to the bottom of the feed barrel 1 and continue to participate in the mixing; After the mixing is completed, the seal of the discharging port 2 is opened, and the controller 27 controls the driving motor 13 to rotate reversely. At the same time, the solenoid valves in the one-way pipe 33 and the one-way port 17 are controlled to open, and the solenoid valve in the communicating pipe 16 is closed. When the driving motor 13 rotates reversely, the rotation mode of the stirring blade 22 changes, and the material is pressed below the stirring blade 22. When rotating reversely at a relatively high speed, the material moves eccentrically under the action of centrifugal force and moves towards the discharging port 2, which is convenient for comprehensive discharging. At the same time, the lower output shaft of the driving motor 13 drives the rotating disk 14 to rotate, and the rotating disk 14 drives the piston plate 31 in the piston cylinder 30 to make left and right reciprocating movements through the connecting rod 32 at the eccentric position. Cooperating with the one-way valves inside the one-way pipe 33 and the one-way port 17, a one-way gas flow can be generated among the inside of the material barrel 1, the annular cavity 9, the filter box 15, the piston cylinder 30 and the outside. This gas flow can suck the air inside the material barrel 1 away. When the gas inside the material barrel 1 is washed away, gas will be supplemented through the feeding part, that is, the one-way air flow among the outside, the feeding part and the inside of the material barrel 1 is completed, that is, the one-way air flow among the outside, the discharging port 2 and the inside of the material barrel 1 is completed. This air flow can suck the diffused dust into the material barrel 1 to avoid dust flying during feeding, and collect these dusts. Since these dusts are all recyclable dusts, the waste of actual raw materials is also reduced.

[0031] The above is only a preferred specific embodiment 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, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A feed mixer, characterized in that, Comprising: A feed barrel (1), a discharge port (2) is arranged on the left side of the inner bottom of the feed barrel (1), the lower end of the feed barrel (1) is fixedly connected to a mounting base (3), a support (4) is installed at the lower end of the mounting base (3), a sealing cover (7) is installed at the upper end of the feed barrel (1), one side of the sealing cover (7) is hinged to the upper end of the feed barrel (1), and the other side of the sealing cover (7) is clamped to the feed barrel (1) through a buckle (28); A mixing mechanism, the mixing mechanism includes a driving motor (13) installed at the inner top of the mounting base (3), the driving motor (13) is a double-shaft motor, a speed reducer is installed on the upper output shaft of the driving motor (13), the output end of the speed reducer extends into the interior of the feed barrel (1) and is fixedly connected to a rotating shaft (20), a plurality of stirring blades (22) are fixedly connected to the outer side of the rotating shaft (20), a plurality of the stirring blades (22) are all inclined, and the lower end surfaces of the plurality of stirring blades (22) are all in contact with the inner bottom of the feed barrel (1); A screening mechanism, the screening mechanism is used for screening agglomerated particles in the feed and crushing them; A gas movement mechanism, the gas movement mechanism is used to promote the mixing of feed particles and can avoid dust escape during the discharging operation.

2. The feed mixer according to claim 1, wherein, A sealing door (5) is installed on the front side of the mounting base (3), and a plurality of heat dissipation holes (29) are opened on the rear side wall of the mounting base (3).

3. The feed mixer according to claim 2, wherein An installation frame (6) is fixedly connected to the right side of the mounting base (3), and a controller (27) is installed at the upper end of the installation frame (6).

4. A feed mixer according to claim 3, characterized in that, The screening mechanism includes a lifting cylinder (12) vertically arranged inside the feed barrel (1), two connecting frames (11) are fixedly connected to the outer wall of the lifting cylinder (12), the other ends of the two connecting frames (11) are both fixedly connected to the inner wall of the feed barrel (1), the upper end of the rotating shaft (20) penetrates through the lifting cylinder (12), and a spiral blade (21) is installed inside the lifting cylinder (12) where the rotating shaft (20) is located.

5. A feed mixer according to claim 4, characterized in that, A rotating cylinder (23) is sleeved outside the upper part of the lifting cylinder (12), an inclined filter disc (25) is fixedly connected to the outer wall of the rotating cylinder (23), the outer side of the inclined filter disc (25) is fixedly connected to the rotating shaft (20) through two fixing strips (24), and a plurality of sorting holes are opened on the inclined filter disc (25).

6. The feed mixer according to claim 5, characterized in that, Two fixing rods (18) are symmetrically and fixedly connected to the inner top space inner wall of the feed barrel (1), an extrusion ring (19) is fixedly connected to the opposite ends of the two fixing rods (18), a diversion ring (26) is fixedly connected to the outer side of the upper end of the rotating cylinder (23), and the outer side surface of the diversion ring (26) is beveled and cooperates with the extrusion ring (19).

7. A feed mixer according to claim 6, wherein, The gas movement mechanism includes an annular cavity (9) opened inside the material barrel (1). A plurality of connection ports (10) are opened on the inner wall of the annular cavity (9). A piston cylinder (30) is fixedly connected to the right side wall of the mounting base (3). A piston plate (31) that can slide left and right is arranged inside the piston cylinder (30). The lower output shaft of the driving motor (13) is fixedly connected to a rotating disk (14). A connecting rod (32) is rotatably connected to an eccentric position at the lower end of the rotating disk (14). The other end of the connecting rod (32) is rotatably connected to the left side of the piston plate (31). The right side space of the piston cylinder (30) is communicated with the inside of the annular cavity (9) through a connecting pipe (16).

8. A feed mixer according to claim 7, wherein, A filter box (15) is installed on the right side wall of the mounting base (3). A filter net is installed inside the filter box (15). The rear side space of the filter box (15) is communicated with the right side space of the piston cylinder (30) through a one-way pipe (33). The front side space of the filter box (15) is communicated with the front side space of the annular cavity (9) through a connecting pipe (8). The right side space of the piston cylinder (30) is communicated with the outside through a one-way port (17). One-way valves are installed inside both the one-way pipe (33) and the one-way port (17). The flow direction of the one-way valve inside the one-way pipe (33) is from the filter box (15) into the piston cylinder (30) unidirectionally. The flow direction of the one-way valve inside the one-way port (17) is from the piston cylinder (30) to the outside unidirectionally.

9. A feed mixer according to claim 8, wherein, Solenoid valves are installed inside the connecting pipe (16), the one-way port (17), and the one-way pipe (33). The controller (27) is used to control the driving motor (13) and a plurality of solenoid valves.

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