Soybean screening device for soy products

Abstract

The soybean screening device for bean products comprises a ground for mounting various components and mechanisms, a lifting bucket for containing the soybeans to be screened, a lifting mechanism for stably standing on the ground and for lifting and lowering the lifting bucket, a gate arranged at the lower outlet of the lifting bucket, a quantitative conveying mechanism arranged below the gate and standing on the ground, a negative pressure suction component arranged at the output end of the quantitative conveying mechanism and used for sucking the soybeans conveyed by the quantitative conveying mechanism, a rolling and separating bin fixedly connected below the negative pressure suction component, a rolling component arranged in the rolling and separating bin, and a separating component arranged below the rolling component. The present application can break the moldy or worm-eaten soybeans into two halves by rolling the soybeans with a certain intensity, and then screen out the broken soybeans, so that the moldy or worm-eaten soybeans can be screened and separated even when they are not visible to the naked eye.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of soybean screening devices, and specifically relates to a soybean screening device used for producing high-quality bean products. BACKGROUND

[0002] Bean products are various, delicious and rich in nutritional value, and are deeply loved by people. To produce high-quality bean products such as soybean paste, soy milk and douchi, in addition to continuously optimizing production equipment and process, high-quality raw materials are particularly important.

[0003] Soybeans usually need several months or even several years from autumn harvest to processing. During this period, some adverse factors such as changes in temperature and humidity of the environment during transportation, local humidity of the storage environment, etc. may cause some soybeans to become moldy or worm-eaten. Even if there are only a few bad soybeans, it will seriously affect the quality of food, especially moldy soybeans are extremely harmful to human health, so they need to be selected and removed.

[0004] There are many devices for screening soybeans in the prior art. For example, the application publication No. CN113663903A, entitled "Soybean screening device for bean products", mainly solves the problems of automatically and intermittently adding soybeans to the device and screening soybeans in multiple stages. This method is usually used to remove larger soil, stones and other impurities mixed in the soybeans; another example is the authorized announcement No. CN111804586B, entitled "Black soybean screening machine with multiple screening function before douchi production", which distinguishes the shriveled soybeans by air blowing and uses the principle that shriveled soybeans are lighter in weight and can be blown further.

[0005] However, since the volume of moldy or worm-eaten soybeans does not change significantly after the occurrence of mold or worm-eating, only the color and luster have a large difference, these devices cannot screen out bad soybeans and need to rely on manual selection. If the mold or worm-eating is in the early stage, it is also difficult to distinguish by color and luster.

[0006] In fact, as we all know, dried and complete soybeans have strong hardness, while moldy or worm-eaten soybeans, even in the early stage, have undergone great changes in internal organization, and the hardness is greatly reduced. Taking advantage of this natural phenomenon, our technical personnel have found a simple and easy solution. SUMMARY

[0007] In view of the defects of the prior art, the technical problem to be solved by the present application is to provide a soybean screening device for bean products, which can screen and remove moldy or worm-eaten soybeans.

[0008] The application aims to realize the technical scheme of a soybean screening device for soy products. The device cracks and separates moldy or worm-eaten soybeans into two halves by rolling and pressing the soybeans at a certain intensity, and then screens out the cracked soybeans. The device comprises a platform for installing various components and mechanisms, a lifting bucket for containing the soybeans to be screened, a lifting mechanism for stably standing on the platform and lifting and lowering the lifting bucket, a gate provided at the lower outlet of the lifting bucket, a quantitative conveying mechanism standing on the platform and provided below the gate, a negative pressure suction component provided at the output end of the quantitative conveying mechanism for sucking the soybeans conveyed in the quantitative conveying mechanism, a rolling and separating bin fixedly connected below the negative pressure suction component, a rolling component provided in the rolling and separating bin, a separating component provided below the rolling component, and a support frame standing on the platform and fixedly connected with the rolling and separating bin.

[0009] The quantitative conveying mechanism is a track circulating transmission. A plurality of transport boxes are fixedly arranged on the track at intervals. During operation, the track moves, a transport box comes below the gate, the track stops, the gate opens, the soybeans enter the transport box one by one until the designed amount is reached, the gate closes, the track moves to continue containing the next transport box, the suction inlet of the negative pressure suction component has a telescopic function, when the transport box containing the soybeans comes below the suction inlet, the suction inlet is lowered to match the transport box, the negative pressure suction component sucks all the soybeans into the rolling and separating bin, the rolling component rolls and presses the soybeans after flattening, and finally the rolled and pressed soybeans fall into the separating component by gravity to complete the screening and separation.

[0010] As a preferred embodiment, the negative pressure suction component comprises a shell, an exhaust fan installed outside the shell to provide negative pressure for the shell, a suction inlet provided at the lowest position of the shell, a vertical section upwardly provided at the suction inlet, the vertical section being telescopic, a connecting piece provided at each side of the suction inlet corresponding to the conveying direction of the quantitative conveying mechanism, a push cylinder fixedly connected with the connecting piece at a position corresponding to the connecting piece of the quantitative conveying mechanism.

[0011] As a preferred embodiment, a filter screen is provided at the mouth of the suction inlet, the filter screen is arranged obliquely, the oblique direction is that the low end faces the rolling and separating bin, and the outlet starts at a position corresponding to the low end of the filter screen, an inwardly extending guide plate is provided at the outlet, and an outwardly extending sundry channel having the same oblique direction is provided.

[0012] As a preferred embodiment, a channel bifurcation is provided at a side of the shell close to the rolling and separating bin, an upward channel is in communication with the exhaust fan, and a downward channel is a channel for the soybeans to enter the rolling and separating bin. A conveying wheel in the shape of a fan in cross section is provided in the downward channel, an installation part matching the maximum diameter of the conveying wheel is provided in the channel, a synchronous belt transmission assembly and a transmission motor are provided to simultaneously rotate the conveying wheel.

[0013] Preferably, the compaction and separation chamber is vertically connected, with the upper end connected to the shell and the lower end fixed to the support frame. The side facing the quantitative conveying mechanism is the front, which engages with the lower channel of the shell, and the engagement has a notch. The side away from the quantitative conveying mechanism is the rear, which has a push mounting hole for installing the push component in the compaction assembly.

[0014] Preferably, the compaction assembly includes a partition plate fixed inside the compaction and separation chamber and sized to completely divide the transverse space of the compaction and separation chamber; a soybean positioning plate of the same size as the partition plate, plate-shaped and made of elastic material; the soybean positioning plate has a dense array of positioning holes with a particle size larger than that of soybeans on its surface, except for a small blank area on both sides; two symmetrical support plates located below the soybean positioning plate, each facing the inner wall of the compaction and separation chamber and hinged; the upper surface of the two support plates has an array of arc-shaped recesses with the same number of intervals as the positioning holes; and receiving hoppers located below the two support plates, fixed to the two inner walls of the compaction and separation chamber on both sides, with the sides facing upwards for the support plates to be hinged.

[0015] Preferably, the separator, soybean positioning plate, tray, and receiving hopper are all tilted to a certain extent, with the side away from the quantitative conveying mechanism being the lower end, and the upper end of the soybean positioning plate being flush with the notch.

[0016] Preferably, the compaction assembly also includes an opening and closing mechanism disposed between the pallet and the receiving hopper.

[0017] Preferably, the compaction assembly also includes a compaction actuator movably disposed between the partition plate and the soybean positioning plate. The telescopic part passes through the push mounting hole and connects to the compaction actuator, while the main body is fixedly installed on the compaction separation chamber. The compaction actuator has a cross-section of shape , with a length the same as that of the soybean positioning plate. Multiple independent, elastic, triangular-section pressure blocks are fixedly arranged on the bottom surface near the vertical side. The pressure blocks are installed with their inclined surfaces facing downwards. The spacing between each pressure block is the same as the spacing between the positioning through holes. The total number of pressure blocks is the same as the number of positioning through holes in a single row. Each pressure block is provided with a rotatable pressure wheel. A push plate is fixedly disposed on the bottom surface of the compaction actuator opposite to the pressure wheel. An arc-shaped groove is provided in the push plate corresponding to the position of each pressure block. A rotatable traveling wheel is disposed on each of the two sides of the upper end of the compaction actuator.

[0018] Preferably, a support cylinder is installed on the outer surface of the front and rear sides of the compaction and separation chamber. A support block is fixed to the telescopic end of the support cylinder. The telescopic end can enter under the two support plates, and the support block contacts the bottom surface of the two support plates.

[0019] In summary, the present invention has the following advantages compared with the prior art:

[0020] ① Existing technologies rely on manual visual screening, which inevitably leads to omissions and makes it difficult to remove soybeans that are rotten inside. However, this invention crushes each soybean with a certain intensity, causing moldy or insect-infested soybeans to break into two halves. The broken soybeans are then sieved out. Therefore, even when mold or insect infestation is not visible to the naked eye, it can still be screened and separated.

[0021] ② Although the entire device crushes each soybean individually, it does so in batches at a high speed, with a continuous overall rhythm and very short pauses. Therefore, the work efficiency is not low while effectively ensuring the quality of the work.

[0022] ③ It utilizes the vibration of the negative pressure suction component to promote the soybeans' falling position and prevent them from getting stuck during separation, thus turning unfavorable factors into advantages.

[0023] In summary, the design concept of this invention is based on obtaining high-quality raw materials. Therefore, each soybean is carefully selected. The design takes into account the characteristics of the soybean's round shape and internal structure in multiple stages. The entire device has low power consumption, thorough screening and separation, and good results, making it suitable for market promotion. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a structural schematic diagram of the present invention, which hides the lifting mechanism;

[0026] Figure 3 This is a schematic diagram of the combined structure of the negative pressure suction component, the crushing and separation chamber, and the support frame.

[0027] Figure 4 This is a schematic diagram of the combined structure of the negative pressure suction component and the crushing and separation chamber.

[0028] Figure 5 This is a schematic diagram of the combined structure of the compaction separation chamber, compaction components, and support frame.

[0029] Figure 6 This is a schematic diagram of the structure after the compaction separation chamber and support frame are combined;

[0030] Figure 7 This is a schematic diagram of the structure after the compaction separation chamber (with part of the front panel removed), compaction components, and support frame are combined.

[0031] Figure 8 This is a structural diagram of the compaction separation chamber (with the front panel partially cut off), compaction components, and support frame assembled from another angle.

[0032] Figure 9This is a structural schematic diagram of the components of the rolling mill assembly;

[0033] Figure 10 This is a schematic diagram of the push plate structure.

[0034] Marked in the diagram: Platform 001, Qualified Product Drainage Channel 002, Conveyor Belt 003, Storage Box 004, Lifting Bucket 01, Lifting Mechanism 02, Gate 03, Quantitative Conveying Mechanism 10, Transport Box 11, Negative Pressure Suction Assembly 20, Housing 21, Exhaust Fan 22, Suction Inlet 23, Connector 24, Push Cylinder 25, Filter Screen 26, Debris Channel 27, Conveyor Wheel 28, Mounting Part 29, Synchronous Belt Drive Assembly 29a, Transmission Electricity Machine 29b, crushing and separating chamber 30, notch 31, push mounting hole 32, crushing assembly 40, separator plate 41, soybean positioning plate 42, positioning through hole 43, support plate 44, arc-shaped recess 45, receiving hopper 46, crushing actuator 47, pressing block 47a, pressing roller 47b, push plate 47c, arc-shaped groove 47d, walking wheel 47e, opening and closing mechanism 48, crushing and pushing cylinder 49, separating assembly 50, rib plate 51, support frame 60. Detailed Implementation

[0035] The present invention will be further described below with reference to the embodiments illustrated in the accompanying drawings:

[0036] Example 1

[0037] This invention provides a soybean screening device for soy products. The device crushes soybeans with a certain intensity, causing moldy or insect-infested soybeans to break (usually naturally splitting into two halves), and then screens out the broken soybeans. Figure 1 The overall structure of the device is shown, including a platform 001 for mounting various components and mechanisms, a liftable bucket 01 for holding soybeans to be screened, a lifting mechanism 02 stably standing on the platform 001 for raising and lowering the bucket 01, a gate 03 located at the lower outlet of the bucket 01, a quantitative conveying mechanism 10 standing on the platform 001 and located below the gate 03, a negative pressure suction component 20 located at the output end of the quantitative conveying mechanism 10 for sucking in soybeans conveyed from the quantitative conveying mechanism 10, a crushing and separating chamber 30 located below the negative pressure suction component 20 and fixedly connected to it, a crushing component 40 located in the crushing and separating chamber 30, a separating component 50 located below the crushing component 40, and a support frame 60 standing on the platform 001 and fixedly connected to the crushing and separating chamber 30.

[0038] The quantitative conveying mechanism 10 uses a crawler-driven circulating transmission system, with multiple transport boxes 11 fixedly installed at intervals on the crawler. During operation, as the crawler moves, a transport box 11 comes to a position below the gate 03, the crawler stops, the gate 03 opens, and soybeans continuously enter the transport box 11 until the designed weight is reached. The gate 03 then closes, and the crawler continues to carry the next transport box 11. The suction inlet of the negative pressure suction assembly 20 has a telescopic function. When a transport box 11 filled with soybeans comes to a position below the suction inlet, the inlet lowers until it meets the inlet, and the negative pressure suction assembly 20 sucks all the soybeans into the crushing and separating chamber 30. The crushing assembly 40 flattens and crushes the soybeans, and finally, the crushed soybeans fall under their own weight into the separating assembly 50 for screening and separation.

[0039] Reference Figure 3 The negative pressure suction assembly 20 includes a housing 21 and an exhaust fan 22 installed outside the housing 21 to provide negative pressure to the housing 21. The suction port 23 at the lowest point of the housing 21 has a retractable vertical section extending upwards; this retractable structure can employ one of the prior art methods, such as a bellows structure. A connector 24 is provided on each side of the suction port 23 corresponding to the conveying direction of the metering mechanism 10. A push cylinder 25 is fixedly connected to each of the two connectors 24 on the metering mechanism 10, with the movable end of the push cylinder 25 fixedly connected to the connector 24.

[0040] To prevent larger objects from being sucked in, a filter screen 26 is provided at the inlet of the suction port 23. To prevent objects with a particle size similar to that of soybeans, such as stones, from being sucked into the crushing and separating chamber 30, the filter screen can be tilted with its lower end facing the crushing and separating chamber 30. An outlet is provided at the position of the suction port 23 corresponding to the lower end of the filter screen, and a guide strip extends inward from the outlet and a debris channel 27 with the same tilt direction extends outward.

[0041] Soybeans are prone to getting mixed with stones during the autumn harvest and drying process. When the negative pressure suction component 20 is working, the vertical section of the suction port 23 causes heavier stone particles to fall onto the guide strips under the action of gravity, and then roll into the debris channel 27, thereby achieving a filtration effect.

[0042] Reference Figure 4The housing 21 has a branched channel on the side adjacent to the crushing and separating chamber 30. One upward-facing channel connects to the exhaust fan 22, while the other downward-facing channel is for soybeans to enter the crushing and separating chamber 30. The downward-facing channel contains a fan-shaped conveyor wheel 28, and a mounting part 29 that matches the maximum diameter of the conveyor wheel 28. This ensures that when the conveyor wheel 28 rolls within the mounting part 29, its maximum diameter remains at least partially within the mounting part 29, guaranteeing a certain degree of airtightness in the crushing and separating chamber 30 and maintaining the negative pressure of the housing 21. This structure, which mates with the conveyor wheel 28 and the mounting part 29, is also located within the debris channel 27. Further details are provided in the reference section. Figure 3 A synchronous belt drive assembly 29a and a drive motor 29b are provided to enable the conveyor wheels 28 in the two channels to rotate simultaneously.

[0043] The structure of the crushing and separating chamber 30 is referenced. Figure 6 The upper end is connected to the housing 21, and the lower end is fixed to the support frame 60. The side facing the quantitative conveying mechanism 10 is the front, which is joined to the lower channel of the housing 21. The joint has a notch 31. The side away from the quantitative conveying mechanism 10 is the rear, which is provided with a push mounting hole 32 for installing the push component in the crushing assembly 40.

[0044] Compactor component 40, refer to Figure 5 , 7 8, 9, including a partition plate 41 fixed inside the crushing and separating chamber 30 and sized to completely divide the transverse space of the crushing and separating chamber 30; a soybean positioning plate 42 of the same size as the partition plate 41, plate-shaped, and made of elastic material such as sponge or rubber; a dense array of positioning holes 43 with a particle size larger than soybeans on the surface of the soybean positioning plate 42, except for a small blank area on both sides; two symmetrical support plates 44 located below the soybean positioning plate 42, each facing the inner wall of the crushing and separating chamber 30 and hinged; an array of arc-shaped recesses 45 on the upper surface of the two support plates 44, the number of which is exactly the same as the number of the positioning holes 43; and a receiving hopper 46 located below the two support plates 44, fixed to the two inner walls of the crushing and separating chamber 30 on both sides and facing upwards for the support plates 44 to be hinged.

[0045] The separator plate 41, soybean positioning plate 42, tray 44, and receiving hopper 46 are all inclined to a certain extent. The side away from the quantitative conveying mechanism 10 is the lower end. The upper end of the soybean positioning plate 42 is flush with the notch 31. So the soybeans can roll smoothly into the soybean positioning plate 42. The operation of the exhaust fan 22 has high frequency and low amplitude vibration. This vibration will help the soybeans fall quickly into the positioning hole 43.

[0046] The compaction assembly 40 also includes an opening and closing mechanism 48 disposed between the pallet 44 and the receiving hopper 46. This mechanism can be any existing mechanism capable of opening and closing the pallet 44, such as a pneumatic strut. In this embodiment, a mechanism combining a connecting rod and a cylinder is used, which can be referred to... Figure 8 ;

[0047] The compaction assembly 40 also includes a compaction actuator 47 movably disposed between the partition plate 41 and the soybean positioning plate 42, a compaction push cylinder 49 whose telescopic part passes through the push mounting hole 32 and is connected to the compaction actuator 47, and whose main body is fixedly mounted on the compaction separation chamber 30; the structure of the compaction actuator 47 is as follows Figure 10 The cross-section is L-shaped and the length is the same as that of the soybean positioning plate 42. Multiple independent pressure blocks 47a with elastic upper and lower sections and triangular cross-sections are fixedly arranged on the bottom side near the vertical side. The pressure blocks 47a are installed with their inclined surfaces facing down. The spacing between each pressure block 47a is the same as the spacing between the positioning holes 43. The total number of pressure blocks 47a is the same as the number of positioning holes 43. Each pressure block 47a is provided with a rotatable pressure wheel 47b. A push plate 47c is fixedly provided on the other side of the bottom surface of the crushing actuator 47 opposite to the pressure wheel 47b. An arc-shaped groove 47d is provided in the push plate 47c corresponding to the position of each pressure block. A rotatable traveling wheel 47e is provided on each side of the upper end of the crushing actuator 47. After the crushing actuator 47 is installed, the bottom surfaces on both sides are attached to the sides of the soybean positioning plate 42. The two traveling wheels 47e at the top are respectively in contact with the bottom surface of the partition plate 41. The whole is parallel to the front of the crushing separation chamber 30. The pressure wheel 47b is aligned with the positioning hole 43.

[0048] Refer to all appendices Figures 1-10During the compaction process, the two pallets 44 are in a closed state, and the compaction actuator 47 is positioned close to the rear of the compaction separation chamber 30, meaning the compaction actuator 47 is in a low position. At this time, each arc-shaped recess 45 is concentric with each positioning hole 43. The height of the arc-shaped recess 45 after concentricity with the positioning hole 43 is equal to or slightly less than the length of the maximum position of the soybean. This ensures that only one soybean enters each positioning hole 43. The conveyor wheel 28 rotates, continuously conveying the soybeans to the soybean positioning plate 42. The soybeans roll downwards in the inclined soybean positioning plate 42, and the rolling soybeans gradually enter the positioning holes 43 until the soybeans flatten the soybean positioning plate 42. This ensures that under the vibration of the exhaust fan 22, one soybean enters each positioning hole 43. Each soybean is supported by the arc surface of the arc-shaped recess 45. The conveying wheel 28 stops rotating, the crushing push cylinder 49 starts, the crushing actuator 47 slides forward, and the push plate 47c pushes away the soybeans in the soybean positioning plate 42 that are outside the positioning hole 43. At the same time, the pressure roller 47b crushes the soybeans in the positioning hole 43. Since each pressing block has independent elasticity, that is, each pressing block presses down independently without affecting each other, each soybean is subjected to the same crushing pressure. This crushing pressure is set so that whole soybeans can withstand it. Soybeans that are moldy or infested by insects will be crushed into two halves under this pressure because their internal structure has been damaged. After the crushing actuator 47 completes its stroke, the opening and closing mechanism 48 opens the support plate 44 downward, and the tilting action causes the soybeans to slide from the arc-shaped recess 45 into the receiving hopper 46. Then the pallet returns to its initial position, the crushing actuator 47 retracts, and the excess soybeans from the previous operation roll down to the soybean positioning plate 42. The conveying wheel 28 rotates to fill the soybeans, and the above steps are repeated.

[0049] To ensure greater stability of the pallet 44 under load, a support cylinder 40a is installed on the outer surfaces of the front and rear sides of the compaction and separation chamber 30 when the two pallets are closed, i.e., when the two pallets are in a horizontal state. The telescopic end of the support cylinder 40a is fixed to a support block, which can enter under the two pallets. The support block contacts the bottom surface of the two pallets. Since the telescopic end can slide through the front and rear sides of the compaction and separation chamber 30, it can provide support.

[0050] The receiving hopper 46 transfers the received soybeans (partly split) into the separating assembly 50 below. The separating assembly 50 can be any structure in the prior art, such as a vibrating screen structure for separation.

[0051] Reference Figure 9In this embodiment, the separating component 50 is formed by an array of multiple ribs 51 that are high in the middle and low at both ends. The distance between the ribs is less than the diameter of the smallest part of the soybean and greater than the thickest part of the half-soybean after the soybean is split in two. The outlet of the receiving hopper 46 is located above the middle of the ribs. After the crushed soybeans enter, the whole soybeans slide to both sides, while the half-soybeans fall into the gap between the two ribs during the sliding process and fall from there, completing the separation. Here, due to the vibration of the exhaust fan 22, the half-soybeans can be made to slide smoothly from the gap.

[0052] Qualified product diversion channels 002 are set on both sides of the rib plate. A conveyor belt 003 is set below the diversion channels 002 to send qualified soybeans to the next process. A defective product collection box 004 is set in the middle of the rib plate to collect defective products.

[0053] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A soybean screening device for soy products, wherein the device crushes soybeans with a certain intensity, causing moldy or insect-infested soybeans to break into two halves, and then screens out the broken soybeans, characterized in that, The system includes a platform (001) for installing various components and mechanisms, a lifting bucket (01) for holding soybeans to be screened that can be lifted, a lifting mechanism (02) that can stand stably on the platform (001) for raising and lowering the lifting bucket (01), a gate (03) located at the lower outlet of the lifting bucket (01), a quantitative conveying mechanism (10) located on the platform (001) and below the gate (03), a negative pressure suction assembly (20) located at the output end of the quantitative conveying mechanism (10) for sucking in the soybeans conveyed in the quantitative conveying mechanism (10), a crushing and separating chamber (30) located below the negative pressure suction assembly (20) and fixedly connected to it, a crushing assembly (40) located in the crushing and separating chamber (30), a separating assembly (50) located below the crushing assembly (40), and a support frame (60) located on the platform (001) and fixedly connected to the crushing and separating chamber (30). The quantitative conveying mechanism (10) is a crawler-driven circular transmission mechanism. Multiple transport boxes (11) are fixedly installed at intervals on the crawler. When working, the crawler moves forward, and a transport box (11) comes to the bottom of the gate (03). The crawler stops, the gate (03) opens, and soybeans enter the transport box (11) one after another until the designed weight is reached. The gate (03) closes, and the crawler moves forward to continue to hold the next transport box (11). The suction port of the negative pressure suction component (20) has a telescopic function. When the transport box (11) filled with soybeans comes to the bottom of the suction port, the suction port extends down to match the two. The negative pressure suction component (20) sucks all the soybeans into the crushing and separation chamber (30). The crushing component (40) flattens and crushes the soybeans. Finally, the crushed soybeans fall into the separation component (50) with their own weight to complete the screening and separation. The crushing assembly (40) includes a partition plate (41) fixed inside the crushing separation chamber (30) and whose size can completely divide the transverse space of the crushing separation chamber (30); a soybean positioning plate (42) of the same size as the partition plate (41), which is plate-shaped and made of elastic material; a positioning through hole (43) with a particle size larger than soybean particle size is densely arrayed on the surface of the soybean positioning plate (42) except for a small blank part on both sides; two symmetrical support plates (44) located below the soybean positioning plate (42), which are hinged to the inner sidewall of the crushing separation chamber (30); an arc-shaped recess (45) with an interval array and the number of the number of the positioning through holes (43) is provided on the upper surface of the two support plates (44); and a receiving hopper (46) located below the two support plates (44), which is fixed to the two inner sidewalls of the crushing separation chamber (30) on both sides and has the support plates (44) hinged on both sides.

2. The soybean screening device according to claim 1, characterized in that, The negative pressure suction assembly (20) includes a housing (21) and an exhaust fan (22) installed outside the housing (21) to provide negative pressure to the housing (21). The housing (21) has an intake port (23) at its lowest point. The intake port (23) has a vertical section that can extend and retract. A connector (24) is provided on both sides of the intake port (23) corresponding to the conveying direction of the quantitative conveying mechanism (10). A push cylinder (25) is fixedly connected to the quantitative conveying mechanism (10) at the positions corresponding to the two connectors (24). The movable end of the push cylinder (25) is fixedly connected to the connector (24).

3. The soybean screening device according to claim 2, characterized in that, The inlet (23) is provided with a filter screen (26). The filter screen is inclined with the lower end facing the crushing and separating chamber (30). The outlet begins at the position corresponding to the lower end of the filter screen at the inlet (23). A guide strip extends inward from the outlet and a debris channel (27) with the same inclined direction extends outward.

4. The soybean screening device according to claim 2, characterized in that, The housing (21) has a channel branch on the side adjacent to the crushing and separating chamber (30). The upward channel is connected to the exhaust fan (22), and the downward channel is the channel for soybeans to enter the crushing and separating chamber (30). The downward channel is provided with a conveyor wheel (28) with a fan-shaped cross-section. The channel is provided with an installation part (29) that matches the maximum diameter of the conveyor wheel (28). A synchronous belt drive assembly (29a) and a drive motor (29b) are provided to make the conveyor wheel (28) rotate simultaneously.

5. The soybean screening device according to claim 1, characterized in that, The crushing and separating chamber (30) is connected vertically, with the upper end connected to the shell (21) and the lower end fixed to the support frame (60). The side facing the quantitative conveying mechanism (10) is the front, which is joined to the lower channel of the shell (21) with a notch (31) at the joint. The side away from the quantitative conveying mechanism (10) is the rear, which is provided with a push mounting hole (32) for installing the push component in the crushing assembly (40).

6. The soybean screening device according to claim 1, characterized in that, The separator (41), soybean positioning plate (42), tray (44), and receiving hopper (46) are all inclined to a certain extent. The side away from the quantitative conveying mechanism (10) is the lower end, and the upper end of the soybean positioning plate (42) is flush with the notch (31).

7. The soybean screening device according to claim 5, characterized in that, The compaction assembly (40) also includes an opening and closing mechanism (48) disposed between the pallet (44) and the receiving hopper (46).

8. The soybean screening device according to claim 5, characterized in that, The compaction assembly (40) also includes a compaction actuator (47) movably disposed between the partition plate (41) and the soybean positioning plate (42). Its telescopic portion passes through the push mounting hole (32) and is connected to the compaction actuator (47), while its main body is fixedly mounted on the compaction separation chamber (30) with a compaction push cylinder (49). The compaction actuator (47) has an L-shaped cross-section, with a length equal to that of the soybean positioning plate (42). Multiple independent, elastic, triangular-section pressing blocks (47a) are fixedly arranged on the bottom surface near the vertical side. The block (47a) is installed with its inclined surface facing down. The spacing between each pressure block (47a) is the same as the spacing between the positioning through holes (43). The total number of pressure blocks (47a) is the same as the number of positioning through holes (43). Each pressure block (47a) is provided with a rotatable pressure roller (47b). A push plate (47c) is fixed on the other side of the bottom surface of the rolling actuator (47) opposite to the pressure roller (47b). An arc-shaped groove (47d) is provided in the push plate (47c) corresponding to the position of each pressure block. A rotatable traveling wheel (47e) is provided on both sides of the upper end of the rolling actuator (47).

9. The soybean screening device according to claim 1, characterized in that, A support cylinder (40a) is provided on the outer surfaces of the front and rear sides of the crushing and separating chamber (30). A support block is fixed to the telescopic end of the support cylinder (40a). The telescopic end can enter under the two pallets, and the support block contacts the bottom surface of the two pallets.

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