Multi-stage crushing and grinding equipment for cereal raw materials

Abstract

The invention discloses multi-stage crushing and grinding equipment for cereal raw materials, and relates to the technical field of food processing. Multi-stage crushing and grinding equipment for grain raw materials comprises a primary crushing device, an extrusion part, a re-crushing mechanism, an extrusion device, a fine grinding device and a collection part, and further comprises a bottom plate, and a rack is mounted on the bottom plate. Through the arrangement of the primary crushing device, the extrusion part, the re-crushing mechanism, the fine grinding device and the like, grains can be gradually crushed into finer powder from large grains in a multi-stage treatment manner, and the uniform granularity and high precision of a final product are ensured; the multi-stage treatment mode is particularly suitable for application scenes with high requirements for the quality of grain powder, and due to cooperative treatment of the extrusion part, the re-crushing mechanism and the fine grinding device, the multi-stage grain powder processing device can be suitable for processing of grains of different sizes, types and hardness, and is better in applicability and high in efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of food processing, and particularly to a multi-stage crushing and grinding device for cereal raw materials. Background Art

[0002] As a key processing tool, crushing and grinding equipment is widely used in fields such as agriculture and the food industry. It is mainly used for crushing and fine grinding of materials such as cereals. In traditional processing processes, such equipment decomposes raw materials into smaller particles or powdered substances through mechanical force to meet the needs of subsequent processing or direct use. There are many traditional cereal crushing and grinding equipment, and most of them use blade crushing or grinding for cereal processing. However, non-traditional cereals, such as soybeans and soybeans in whole grains, can also be regarded as cereals. For such special cereal foods, conventional crushing and grinding equipment is prone to blade damage when using blade crushing, and the grinding process is inefficient. Therefore, in view of this situation, the present invention proposes a new solution. Summary of the Invention

[0003] The purpose of the present invention is to provide a multi-stage crushing and grinding device for cereal raw materials to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A multi-stage crushing and grinding device for cereal raw materials, comprising: A primary crushing device, an extrusion member, a re-crushing mechanism, an extrusion device, a fine grinding device, and a collection member; The multi-stage crushing and grinding device for cereal raw materials further includes a bottom plate, on which a frame is installed. The primary crushing device, the extrusion member, the re-crushing mechanism, the extrusion device, and the fine grinding device are installed on the frame from top to bottom. The primary crushing device includes a feeding bucket, on the inner wall of which a tooth seat is fixed. A grinding wheel is also rotated in the middle of the feeding bucket. A main shaft rod is fixed at the center of the bottom of the grinding wheel. The rotation of the main shaft rod realizes the crushing of cereals by the primary crushing device, and at the same time realizes the cooperation of the extrusion member and the re-crushing mechanism to realize the re-crushing of cereals. A collecting plate is installed on one side of the frame, and the collecting plate cooperates with the extrusion device and the fine grinding device to realize the fine grinding of cereals.

[0005] The bottom plate is made of iron or steel plate material, and a frame is installed on the bottom plate. The frame is a semi-surrounding frame. Among them, the primary crushing device is installed at the top of the frame for receiving cereals. The extrusion member and the re-crushing mechanism are installed below the primary crushing device for re-crushing the preliminarily crushed cereals. The extrusion device is located below the re-crushing mechanism for collecting and extruding the crushed cereals and then performing powder grinding treatment through the fine grinding device. The processed powder is stored by the collection member.

[0006] Regarding this solution, further, the inner wall of the feeding bucket is circular. The inner wall of the tooth seat is wider at the top and narrower at the bottom and is penetrated in the middle. The circumferential surface of the grinding wheel is also wider at the top and narrower at the bottom. The tooth seat and the grinding wheel are coaxially arranged, and there is a gap between the tooth seat and the grinding wheel. Tooth teeth are provided on both the inner wall of the tooth seat and the circumferential surface of the grinding wheel, and the gap between the tooth seat and the grinding wheel is also wider at the top and narrower at the bottom. The top of the grinding wheel is conical to facilitate the rapid entry of grains into the gap.

[0007] Regarding this solution, further, a gearbox is installed on the top of the frame. A sprocket three is fixed on the surface of the main shaft rod. The gearbox and the sprocket three are connected by a chain three passing through the feeding bucket. A driving source three is installed on the gearbox to drive the gearbox through the driving source three.

[0008] Regarding this solution, further, the extrusion part includes a cover bucket. The top of the cover bucket is connected to the feeding bucket through a first blanking hopper. The re-crushing mechanism includes a tool rest. A matrix of blades is fixed on the inner wall of the tool rest. One end of the main shaft rod away from the grinding wheel is rotatably installed in the middle of the matrix of blades. The cover bucket is located above the matrix of blades. A spiral propelling blade is fixed on the surface of the main shaft rod inside the cover bucket.

[0009] Regarding this solution, further, the matrix of blades is composed of several blades arranged vertically and horizontally. The aperture formed between the blades is not greater than 2 mm, and the part of the matrix of blades connected to the main shaft rod in the middle is a solid block structure without blades. Several screws are fixed around the matrix of blades. A border is fixed on the surface of the cover bucket, and holes are provided on the border corresponding to the screws. The position of the screws is locked through nuts after the screws pass through the holes.

[0010] Regarding this solution, further, the extrusion device includes an extrusion shell. The main body part of the extrusion shell is a cylindrical barrel. One end of the cylindrical barrel is a conical barrel, and the axis of the extrusion shell is horizontally arranged. The shell of the extrusion shell is connected to the bottom of the tool rest through a second blanking hopper; A screw conveyor one is arranged inside the extrusion shell. The screw conveyor one is rotatably installed on the inner wall of one end of the extrusion shell. A driving source one is installed at one end of the extrusion shell, and the driving source one is coaxially fixed with the screw conveyor one.

[0011] Regarding this solution, further, the collecting plate includes a hollow plate. A baffle is fixed on one side of the hollow plate through screws. The conical barrel end of the extrusion shell penetrates through the baffle and is fixed to the baffle; The fine grinding device includes a grinding disc. The grinding disc faces the extrusion end of the extrusion shell, and the distance between the grinding discs does not exceed 120 μm. Through the rotation of the grinding disc, the grinding action is realized in cooperation with the pressure exerted when the extrusion device extrudes grains.

[0012] Furthermore, regarding this solution, a spiral swirling baffle is provided at the conical cylinder of the extrusion shell. The spiral swirling baffle is formed by curling iron or steel sheet materials into a spiral shape, and the diameter of the spiral swirling baffle gradually decreases from the extrusion end towards the direction of the first auger.

[0013] Furthermore, regarding this solution, an arm shaft is fixed on the side of the grinding disc away from the extrusion device. The arm shaft is rotatably installed on the side of the hollow plate away from the extrusion shell. The fine grinding device further includes a bearing seat. Two first sprockets are rotatably installed at the bearing seat. One end of the arm shaft passes through the hollow plate and is located outside the hollow plate. A second sprocket is fixed at the part of the arm shaft outside the hollow plate. A chain two is connected between one of the first sprockets and the second sprocket. A fixing plate is installed on one side of the frame. A second driving source is installed at the fixing plate. The output end of the second driving source is also fixed with a sprocket and is connected to one of the first sprockets by a chain one in the same way.

[0014] Furthermore, regarding this solution, the collecting part includes a discharge pipe. The discharge pipe is inclined from the end close to the bearing seat towards the other end. The end of the discharge pipe close to the bearing seat is connected to the hollow plate through a transfer hopper. A second auger is rotatably installed in the discharge pipe. The second auger conveys the separated grains to the other end, and a discharge port is provided at the other end of the discharge pipe; A universal joint is rotatably installed on the outer surface of the end of the discharge pipe close to the bearing seat. The universal joint is coaxially fixed to the second auger. The end of the universal joint away from the discharge pipe is coaxially fixed to the first sprocket after passing through the bearing seat.

[0015] Compared with the prior art, the beneficial effects of the present invention are: Through the settings of the primary crushing device, the extrusion part, the re-crushing mechanism, and the fine grinding device, etc., this multi-stage crushing and grinding equipment for grain raw materials can gradually crush grains from large particles to a finer powder state in a multi-stage processing manner, ensuring that the particle size of the final product is uniform and the precision is high. This multi-stage processing method is particularly suitable for application scenarios with high quality requirements for grain powder. And due to the coordinated processing of the extrusion part, the re-crushing mechanism, and the fine grinding device, it can be applied to the processing of grains with different sizes, types, and hardnesses, with better applicability and high efficiency.

[0016] At the same time, through the rotation of the grinding wheel and the tearing action of the teeth, efficient primary crushing is achieved. Secondly, the blade matrix in the re-crushing mechanism is arranged vertically and closely, reducing the load borne by the blades. At the same time, it avoids the problems of local overheating and blade damage caused by friction in the traditional rotary cutting method, improving the service life and crushing efficiency of the blades. In addition, the spiral swirling baffle design in the extrusion device can increase the density of grains in the extrusion shell and cooperate with the fine grinding device to achieve a more refined grinding action. Description of the Drawings

[0017] Figure 1 Schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the left axonometric structure of the present invention; Figure 3 Schematic diagram of the overall sectional structure of the present invention; Figure 4 Schematic diagram of the positions of the extrusion part, re - crushing mechanism, collecting plate and fine - grinding device of the present invention; Figure 5 Schematic diagram of the extrusion device structure of the present invention.

[0018] In the figure: 1, base plate; 2, frame; 3, primary crushing device; 301, feeding bucket; 302, tooth seat; 303, grinding wheel; 4, extrusion part; 401, cover bucket; 402, spiral propeller blade; 403, border; 404, nut; 5, re - crushing mechanism; 501, tool rest; 502, blade matrix; 503, screw; 6, extrusion device; 601, extrusion shell; 602, auger one; 603, spiral - shaped swirling baffle; 604, driving source one; 7, collecting plate; 701, hollow plate; 702, transfer hopper; 703, baffle; 8, collecting part; 801, discharge pipe; 802, auger two; 803, discharge opening; 9, fine - grinding device; 901, bearing seat; 902, sprocket one; 903, chain one; 904, chain two; 905, arm shaft; 906, sprocket two; 907, grinding disc; 908, fixing plate; 909, driving source two; 10, feeding hopper one; 11, main spindle rod; 12, sprocket three; 13, chain three; 14, gear box; 15, driving source three; 16, universal joint; 17, feeding hopper two. Detailed implementation manners

[0019] 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. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present invention.

[0021] In addition, it should be understood that for ease of description, the dimensions of the various components shown in the drawings are not drawn to actual scale. For example, the thickness or width of certain layers may be exaggerated relative to other layers.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined or described in one drawing, it will not be necessary to further specifically discuss and describe it in the description of subsequent drawings.

[0023] As Figure 1 shown, the present invention provides a technical solution: a multi-stage crushing and grinding device for cereal raw materials, including a primary crushing device 3, an extrusion member 4, a re-crushing mechanism 5, an extrusion device 6, a fine grinding device 9, and a collecting member 8; The device further includes a bottom plate 1, which is made of iron or steel sheet material. A frame 2 is installed on the bottom plate 1, and the frame 2 is a semi-enclosed frame. Among them, the primary crushing device 3 is installed at the top of the frame 2 for receiving cereals. The extrusion member 4 and the re-crushing mechanism 5 are installed below the primary crushing device 3 for re-crushing the preliminarily crushed cereals. The extrusion device 6 is located below the re-crushing mechanism 5 for collecting the crushed cereals and extruding them, and then passing them through the fine grinding device 9 for powder grinding treatment. The processed powder is stored by the collecting member 8.

[0024] As Figure 3 shown, to ensure the smooth implementation of the above embodiments, it should be understood that there is a rectangular frame at the top of the frame 2. The primary crushing device 3 includes a feeding bucket 301, and the feeding bucket 301 is installed on the rectangular frame. The inner wall of the feeding bucket 301 is circular. A tooth seat 302 is fixed on the inner wall of the feeding bucket 301. The inner wall of the tooth seat 302 is wider at the top and narrower at the bottom and is through in the middle. A grinding wheel 303 is also rotated in the middle of the feeding bucket 301. The circumferential surface of the grinding wheel 303 is also wider at the top and narrower at the bottom. That is to say, the tooth seat 302 and the grinding wheel 303 are coaxially arranged, and there is a gap between the tooth seat 302 and the grinding wheel 303. Tooth teeth are provided on both the inner wall of the tooth seat 302 and the circumferential surface of the grinding wheel 303, and the gap between the tooth seat 302 and the grinding wheel 303 is also wider at the top and narrower at the bottom. The widest gap between the tooth seat 302 and the grinding wheel 303 is not less than 2 cm, and the narrowest gap is not more than 2 mm. Through this structural setting, cereals can quickly enter the gap between the tooth seat 302 and the grinding wheel 303. Through the rotation of the grinding wheel 303 and the tearing action between the tooth teeth, the cereals are torn and crushed. It should be noted that the top of the feeding bucket 301 is open, and the top of the grinding wheel 303 is conical, which can allow cereals to quickly enter the gap and improve the efficiency of crushing cereals; As Figure 3As shown in the figure, in addition, a main spindle rod 11 is fixed at the center of the bottom of the grinding wheel 303. A gearbox 14 is installed on the top of the frame 2. A sprocket three 12 is fixed on the surface of the main spindle rod 11. The gearbox 14 and the sprocket three 12 are connected through a chain three 13 after passing through the feeding bucket 301. To achieve the cooperation with the sprocket three 12, a sprocket is installed in the gearbox 14. A driving source three 15 is installed on the gearbox 14. The gearbox 14 is driven by the driving source three 15, and the rotation of the grinding wheel 303 is realized through the cooperation of the chain and the sprocket. That is to say, a gap is provided between the tooth seat 302 and the bottom of the grinding wheel 303 and the inner wall of the bottom of the feeding bucket 301 to meet the installation of the chain three 13 and the sprocket three 12.

[0025] Through the above settings of the grinding wheel 303 and the tooth seat 302, primary crushing of various grains can be carried out, and for soybean raw materials, it also has quite good crushing effects. With its excellent structural design, basically no situation of grain blockage will occur.

[0026] As Figure 3 and Figure 4 As shown in the figure, regarding this technical solution, it should also be understood that the extrusion part 4 includes a cover barrel 401. The top of the cover barrel 401 is connected to the feeding bucket 301 through a first blanking hopper 10. The re-crushing mechanism 5 includes a tool rest 501. The tool rest 501 is a rectangular or circular frame. A blade matrix 502 is fixed on the inner wall of the tool rest 501. One end of the main spindle rod 11 away from the grinding wheel 303 is rotatably installed in the middle of the blade matrix 502. Among them, the cover barrel 401 is located above the blade matrix 502. A spiral propelling blade 402 is fixed on the surface of the main spindle rod 11 inside the cover barrel 401. That is to say, through the rotation of the main spindle rod 11, the grains in the cover barrel 401 can be pushed downward and pressed against the blade matrix 502, and the grains are cut into finer granular by the blade matrix 502; It should be added that the blade matrix 502 is composed of a number of blades arranged vertically and horizontally. The aperture formed between the blades is not greater than 2 mm, and the part of the blade matrix 502 connected to the main spindle rod 11 in the middle is a solid block structure without blades to maintain sufficient support conditions for the main spindle rod 11; A number of screw rods 503 are fixed around the blade matrix 502. A surrounding edge 403 is fixed on the surface of the cover barrel 401. Holes are opened on the surrounding edge 403 corresponding to the screw rods 503. After the screw rods 503 pass through the holes, the positions of the screw rods 503 are limited by nuts 404 to maintain the tight connection between the extrusion part 4 and the re-crushing mechanism 5.

[0027] Compared with traditional blade crushing and cutting, the blade matrix 502 proposed in this embodiment has a better crushing effect. Since the blades are vertically arranged and closely distributed, the load on the blades is reduced. In the traditional blade rotary cutting method, local overheating due to friction may occur during contact with grains, generating thermal stress and causing blade damage. Therefore, blades of different hardnesses need to be used for grains of different hardnesses. However, for the blade matrix 502 in this embodiment, because the blades have stronger pressure-bearing capacity and do not have the drawbacks of rotary cutting, conventional blades can be used to re-crush various grains, and the effect is better.

[0028] As Figure 4 and Figure 5 shown, the extrusion device 6 includes an extrusion housing 601. The main part of the extrusion housing 601 is a cylindrical barrel, and one end of the cylindrical barrel is a conical barrel. The axis of the extrusion housing 601 is horizontally arranged. The housing of the extrusion housing 601 is connected to the bottom of the tool holder 501 through a second blanking hopper 17. That is to say, the re-crushed grains will enter the extrusion housing 601 through the second blanking hopper 17. It should be understood that a screw conveyor 602 is provided inside the extrusion housing 601. The screw conveyor 602 is rotatably installed on the inner wall of one end of the extrusion housing 601. That is to say, the grains entering the extrusion housing 601 will be conveyed and extruded towards one end of the conical barrel under the rotation of the screw conveyor 602 until they are finally extruded from one end of the conical barrel, and are ground by a fine grinding device 9 during the extrusion process. A driving source 604 is installed at one end of the extrusion housing 601, and the driving source 604 is coaxially arranged with the screw conveyor 602.

[0029] As Figure 3 and Figure 4 shown, it should be understood that the collecting plate 7 includes a hollow plate 701. A baffle 703 is fixed to one side of the hollow plate 701 by screws. One end of the conical barrel of the extrusion housing 601 penetrates through the baffle 703 and is fixed to the baffle 703. That is to say, when the baffle 703 is fixed to the hollow plate 701, the grain extrusion end of the extrusion device 6 is located inside the hollow plate 701, which will not cause dust flying and will not interfere with other positions of the equipment, reducing the maintenance difficulty of the equipment and facilitating collection. Looking back Figure 1 and cooperating with Figure 3 it can be seen that the fine grinding device 9 includes a grinding disc 907. The grinding disc 907 is facing the extrusion end of the extrusion housing 601, and the distance between the grinding discs 907 does not exceed 120 μm. Through the rotation of the grinding disc 907 and the pressure applied when the extrusion device 6 extrudes grains, the grinding operation is realized. The grinding disc 907 is a diamond grinding disc 907, and the side facing the extrusion device 6 is sanded to improve the grinding efficiency, and the sanding precision is between 400 mesh and 1200 mesh. AsFigure 5 As shown, regarding the above technical solution, it should also be understood that a spiral swirling baffle 603 is provided at the conical cylinder of the extrusion housing 601. The spiral swirling baffle 603 is formed by curling an iron or steel sheet material into a spiral shape, and the diameter of the spiral swirling baffle 603 gradually decreases from the extrusion end towards the direction of the first auger 602. That is to say, the extrusion device 6 can not only achieve the extrusion and discharging of grains by means of the setting of the first auger 602, but also, due to the setting of the spiral swirling baffle 603, increase the density of the grains in the extrusion housing 601 when the extrusion device 6 extrudes the grains, and cooperate with the grinding disc 907 to achieve a more refined grinding action on the grains.

[0030] Looking back Figure 1 , to achieve the above process, an arm shaft 905 is fixed on the side of the grinding disc 907 facing away from the extrusion device 6. The arm shaft 905 is rotatably installed on the side of the hollow plate 701 facing away from the extrusion housing 601. The fine grinding device 9 further includes a bearing seat 901. Two first sprockets 902 are rotatably installed at the bearing seat 901. One end of the arm shaft 905 passes through the hollow plate 701 and is located outside the hollow plate 701. A second sprocket 906 is fixed at the position of the arm shaft 905 outside the hollow plate 701. A second chain 904 is connected between one of the first sprockets 902 and the second sprocket 906. A fixed plate 908 is installed on one side of the frame 2. A second drive source 909 is installed at the fixed plate 908. The output end of the second drive source 909 is also fixed with a sprocket and is connected to one of the first sprockets 902 by a first chain 903. That is to say, the second drive source 909 can control the rotation of the grinding disc 907 through the cooperation of the chain and the sprocket.

[0031] As Figure 3 and Figure 4 shown, to ensure that this embodiment is the best embodiment, it should be known that the collecting member 8 includes a discharge pipe 801. The discharge pipe 801 is inclined from the end close to the bearing seat 901 towards the other end. The end of the discharge pipe 801 close to the bearing seat 901 is connected to the hollow plate 701 through a transfer hopper 702. That is to say, the finely ground grain powder enters the discharge pipe 801 through the transfer hopper 702. A second auger 802 is rotatably installed in the discharge pipe 801. The second auger 802 conveys the grain powder towards the other end, and a discharge port 803 is provided at the other end of the discharge pipe 801.

[0032] As Figure 3As shown, regarding the above solution, it should also be noted that a universal joint 16 is rotatably installed on the outer surface of one end of the discharge pipe 801 close to the bearing seat 901. The universal joint 16 is coaxially fixed with the second auger 802. One end of the universal joint 16 away from the discharge pipe 801 is coaxially fixed with the first sprocket 902 after passing through the bearing seat 901. It should be added that the part of the universal joint 16 passing through the bearing seat 901 is fixed to the inner wall of the bearing of the bearing seat 901 to ensure the normal rotation of the universal joint 16. In other words, the discharge pipe 801 and the grinding disc 907 share a power source, realizing the reasonable distribution of the power source and reducing resource waste.

[0033] The equipment realizes the efficient processing of grain raw materials through multi-stage crushing and grinding. First, the grain enters from the feeding bucket 301 of the primary crushing device 3. The gap between the tooth seat 302 and the grinding wheel 303 is wider at the top and narrower at the bottom. The grain is primarily crushed under the rotation of the grinding wheel 303 and the tearing action of the teeth. The crushed grain enters the extrusion part 4 through the first hopper 10. The spiral propelling blade 402 pushes the grain downward to the blade matrix 502 of the re-crushing mechanism 5. The blade matrix 502 cuts the grain into finer particles. The re-crushed grain enters the extrusion device 6 through the second hopper 17. The first auger 602 conveys and extrudes the grain towards one end of the conical cylinder. The spiral swirling baffle 603 increases the density of the grain. Subsequently, the grain is extruded and enters the fine grinding device 9. The distance between the grinding discs 907 in the fine grinding device 9 does not exceed 120 μm. The grinding action is completed through the rotation of the grinding discs 907 and the pressure applied by the extrusion device 6. The grinding discs 907 are made of diamond material and are sanded to ensure high-precision grinding. The finely ground grain powder enters the discharge pipe 801 of the collecting part 8 through the second transfer hopper 702. The second auger 802 conveys the powder to the discharge port 803. The entire equipment is driven by chains and sprockets, sharing the power source, reducing resource waste, and at the same time, the design avoids grain blockage, improving the processing efficiency and precision.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage crushing and grinding equipment for cereal raw materials, characterized in that, Comprising: A primary crushing device (3), an extrusion part (4), a re-crushing mechanism (5), an extrusion device (6), a fine grinding device (9), and a collection part (8); The multi-stage crushing and grinding equipment for cereal raw materials further includes a bottom plate (1), on which a frame (2) is installed. The primary crushing device (3), the extrusion part (4), the re-crushing mechanism (5), the extrusion device (6), and the fine grinding device (9) are installed on the frame (2) from top to bottom; The primary crushing device (3) includes a feeding bucket (301), a tooth seat (302) is fixed on the inner wall of the feeding bucket (301). A grinding wheel (303) is also rotated in the middle of the feeding bucket (301). A main spindle rod (11) is fixed at the center of the bottom of the grinding wheel (303). The rotation of the main spindle rod (11) realizes the crushing of the cereal by the primary crushing device (3), and at the same time realizes the re-crushing of the cereal by the extrusion part (4) cooperating with the re-crushing mechanism (5); A collecting plate (7) is installed on one side of the frame (2). The collecting plate (7) cooperates with the extrusion device (6) and the fine grinding device (9) to realize the fine grinding of the cereal.

2. The multi-stage crushing and grinding equipment for cereal raw materials according to claim 1, wherein: The inner wall of the feeding bucket (301) is circular. The inner wall of the tooth seat (302) is wide at the top and narrow at the bottom and is penetrated in the middle. The circumferential surface of the grinding wheel (303) is also wide at the top and narrow at the bottom. The tooth seat (302) and the grinding wheel (303) are coaxially arranged, and there is a gap between the tooth seat (302) and the grinding wheel (303). Tooth teeth are provided on the inner wall of the tooth seat (302) and the circumferential surface of the grinding wheel (303), and the gap between the tooth seat (302) and the grinding wheel (303) is also wide at the top and narrow at the bottom. The top of the grinding wheel (303) is conical to facilitate the rapid entry of the cereal into the gap.

3. A multi-stage crushing and grinding device for cereal raw materials according to claim 1, characterized in that: A gear box (14) is installed on the top of the frame (2). A sprocket three (12) is fixed on the surface of the main spindle rod (11). The gear box (14) and the sprocket three (12) are connected by a chain three (13) passing through the feeding bucket (301). A driving source three (15) is installed on the gear box (14), and the driving of the gear box (14) is realized through the driving source three (15).

4. A multi-stage crushing and grinding equipment for cereal raw materials according to claim 1, characterized in that: The extrusion part (4) includes a cover bucket (401). The top of the cover bucket (401) is connected to the feeding bucket (301) through a first blanking hopper (10). The re-crushing mechanism (5) includes a tool rest (501). A blade matrix (502) is fixed on the inner wall of the tool rest (501). One end of the main spindle rod (11) away from the grinding wheel (303) is rotatably installed in the middle of the blade matrix (502). The cover bucket (401) is located above the blade matrix (502). A spiral propelling blade (402) is fixed on the surface of the main spindle rod (11) inside the cover bucket (401).

5. A multi-stage crushing and grinding device for cereal raw materials according to claim 4, characterized in that: The blade matrix (502) is composed of a plurality of blades arranged vertically and horizontally, the aperture formed between the blades is no larger than 2 mm, and the portion of the blade matrix (502) connected to the main shaft rod (11) in the middle is a solid block structure other than a blade. A plurality of screw rods (503) are fixed around the blade matrix (502), a peripheral edge (403) is fixed on the surface of the cover barrel (401), holes are opened on the peripheral edge (403) corresponding to the screw rods (503), and the position of the screw rods (503) is limited by a nut (404) after the screw rods (503) pass through the holes.

6. The multi-stage crushing and grinding equipment for cereal raw materials according to claim 1, wherein: The extrusion device (6) comprises an extrusion shell (601), the main part of the extrusion shell (601) is a cylindrical barrel, one end of the cylindrical barrel is a conical barrel, and the axis of the extrusion shell (601) is arranged horizontally. The shell of the extrusion shell (601) is connected to the bottom of the tool holder (501) via a second drop hopper (17); An auger 1 (602) is arranged inside the extrusion shell (601), and the auger 1 (602) is rotatably mounted on the inner wall of one end of the extrusion shell (601). A driving source 1 (604) is mounted on one end of the extrusion shell (601), and the driving source 1 (604) is coaxially fixed with the auger 1 (602).

7. A multi-stage crushing and grinding device for cereal raw materials according to claim 6, characterized in that: The collecting plate (7) comprises a hollow plate (701), a baffle (703) being fixed to one side of the hollow plate (701) by means of screws, and one end of the conical cylinder of the extrusion shell (601) passes through the baffle (703) and is fixed to the baffle (703); The fine grinding device (9) comprises a grinding disc (907), the grinding disc (907) being directly opposite to the extrusion end of the extrusion shell (601), and the spacing between the grinding discs (907) is no more than 120 μm. The grinding action is achieved by the rotation of the grinding disc (907) in conjunction with the pressure applied by the extrusion device (6) when extruding the grains.

8. A multi-stage crushing and grinding device for cereal raw materials according to claim 6, characterized in that: A vortex swirling block (603) is provided at the conical cylinder of the extrusion shell (601). The vortex swirling block (603) is formed by curling an iron or steel sheet material into a vortex shape, and the diameter of the vortex swirling block (603) gradually decreases from the extrusion end toward the auger (602).

9. A multi-stage crushing and grinding device for cereal raw materials according to claim 7, characterized in that: An arm shaft (905) is fixed on the side of the grinding disc (907) facing away from the extrusion device (6), and the arm shaft (905) is rotatably mounted on the side of the hollow plate (701) facing away from the extrusion shell (601). The fine grinding device (9) also includes a bearing seat (901), and two sprockets (902) are rotatably mounted on the bearing seat (901). One end of the arm shaft (905) passes through the hollow plate (701) and is placed outside the hollow plate (701). The arm shaft (905) is located in the hollow plate (701). A sprocket wheel 2 (906) is fixed to the outside of the core plate (701), and one of the sprocket wheels 1 (902) is connected to the sprocket wheel 2 (906) via a chain wheel 2 (904). A fixing plate (908) is installed on one side of the frame (2), and a driving source 2 (909) is installed on the fixing plate (908). A sprocket is also fixed to the output end of the driving source 2 (909) and is also connected to one of the sprocket wheels 1 (902) via a chain wheel 1 (903).

10. A multi-stage crushing and grinding device for cereal raw materials according to claim 9, characterized in that: The collecting member (8) includes a discharge pipe (801). The discharge pipe (801) is inclined from one end close to the bearing seat (901) towards the other end. A transfer hopper (702) is used to connect between the end of the discharge pipe (801) close to the bearing seat (901) and the hollow plate (701). A second auger (802) is rotatably installed in the discharge pipe (801), and the grain powder is conveyed to the other end through the second auger (802). And a discharge port (803) is provided at the other end of the discharge pipe (801). A universal joint (16) is rotatably installed on the outer surface of the end of the discharge pipe (801) close to the bearing seat (901). The universal joint (16) is coaxially fixed with the second auger (802). One end of the universal joint (16) away from the discharge pipe (801) is coaxially fixed with a first sprocket (902) after passing through the bearing seat (901).

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