Chufa production device and method thereof

Abstract

The present application relates to the technical field of agricultural machinery, in particular to a cyperus esculentus production device and method thereof, the cyperus esculentus production device comprises a screening part; the screening part comprises a bottom plate, a protective shell is arranged on the top of the bottom plate, a receiving groove is arranged at the top of the protective shell, a screen mechanism is arranged on the top of the bottom plate inside the protective shell; the screen mechanism comprises a driving unit one and a driving unit two arranged on the top of the bottom plate, the driving unit one is arranged on the top of the bottom plate close to the receiving groove, and the driving unit two is provided with a plurality of driving units. The screening part has strong adaptability, the bottom plate, the protective shell, the driving unit one, the driving unit two and the spiral screen rod cooperate with each other, the spiral screen rod is attached to the shape of cyperus esculentus, so that the screening and mixing of different grades are avoided; the spiral screen rod gently screens, so that the damage rate is reduced; the positioning assembly, the adjusting assembly and the tooth assembly cooperate with each other, so that the diameter can be adjusted online without stopping, and the adaptability and continuity are improved.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, and in particular to a device and method for producing tiger nuts. Background Technology

[0002] Tiger nuts are a high-value-added specialty economic crop introduced from Africa. They possess properties as grain, oil, feed, and medicinal ingredients, and are rich in various nutrients. They can be processed into edible oil and various food products. After harvesting, they vary in size and plumpness. Large, round, and plump nuts can be used as seeds or high-end processing raw materials, while small, flat, and irregular nuts are used for low-end processing or oil extraction. Therefore, grading by nut size is a core preliminary process for their high-value utilization, directly affecting the quality of the finished product and economic benefits.

[0003] It is important to note that peeling tiger nuts before processing is a crucial prerequisite. Furthermore, current tiger nut grading methods use general grain sorting equipment similar to that used for rice and soybeans, which presents two major technological bottlenecks: First, these general-purpose equipment are designed for perfectly round grains and cannot adapt to the irregular ellipsoidal shape of tiger nuts, which exhibit significant differences in their major and minor axes. They can only be graded based on either the minor or major axis, leading to the easy omission of large, elongated grains and the mixing of small, round grains, thus failing to meet the standardized grading requirements for seed-grade and food-grade processing. Summary of the Invention

[0004] This invention provides a tiger nut production apparatus and method to solve the problem mentioned in the background art that the general grain sorting equipment for tiger nut grading cannot adapt to its irregular ellipsoidal characteristics and is prone to missed or mixed grades.

[0005] To solve the above-mentioned technical problems, one technical solution adopted by the present invention is to provide a tiger nut production apparatus and method, including a screening unit; The screening section includes a bottom plate, a protective shell is provided on the top of the bottom plate, a material receiving groove is provided on the top of the protective shell, and a screen mechanism is provided on the top of the bottom plate inside the protective shell. The screen mechanism includes a drive unit one and a drive unit two disposed on the top of the base plate. The drive unit one is disposed on the top of the base plate near the receiving trough. There are several drive units two disposed in a horizontal array along the top of the base plate. Several spiral screen rods are arranged in a circumferential array between the drive unit one and the drive unit two, as well as between adjacent drive units two. The number of spiral screen rods in each group is different. A material receiving port is provided at the top of the base plate corresponding to the position of the spiral screen rod.

[0006] The present invention is further configured to include a peeling mechanism for peeling tiger nuts and a polishing mechanism for polishing the surface of tiger nuts, wherein the peeling mechanism, the polishing mechanism, and the screening section are connected in sequence by a conveying structure.

[0007] The present invention is further configured such that the drive unit one includes a mounting shell one fixedly connected to the base plate, a connecting disk one rotatably mounted inside the mounting shell one near the drive unit two, a gear ring one provided on one side of the connecting disk one inside the mounting shell one, a transmission gear one rotatably mounted inside the mounting shell one below the gear ring one, the transmission gear one meshing with the gear ring one, and the connecting disk one connected to the spiral screen rod on one side outside the mounting shell one.

[0008] The present invention is further configured such that the second driving unit includes a second mounting shell fixedly connected to the base plate, a positioning component is rotatably mounted inside the second mounting shell near the first driving unit, an adjustment component is rotatably mounted inside the second mounting shell away from the first driving unit, and a discharge port is provided through the bottom of the second mounting shell.

[0009] The present invention is further configured such that the positioning component includes a positioning cylinder rotatably connected to the mounting shell, the inner wall of the positioning cylinder having a plurality of inclined grooves arranged in a circumferential array, and the inner wall of the positioning cylinder having a straight groove between the inclined grooves, both ends of the straight groove being connected to the inclined groove.

[0010] The present invention is further configured such that a fixed frame two is provided at one end of the positioning cylinder near the outside of the mounting shell two, which is rotatably connected to the mounting shell two. One side of the fixed frame two is connected to the spiral screen rod. A storage cavity is provided inside the fixed frame two. An installation groove is provided on the outer circumference of the positioning cylinder near the fixed frame two. A toothed assembly is provided inside the installation groove. A mating tooth is provided inside the mounting shell two at the position corresponding to the installation groove.

[0011] The present invention is further configured such that the toothed assembly includes a plurality of sliders slidably mounted inside the mounting groove. One end of each slider is provided with a connecting rod and the other end is provided with a connecting groove. One end of the connecting rod extends into the connecting groove of an adjacent slider and is hinged thereto. The outer side of each slider is provided with positioning teeth. The outer wall of each slider is provided with an elastic element 1, one end of which is connected to the mounting groove. The inner side of each slider is provided with an elastic element 2. The other end of the elastic element 2 is provided with a connecting block. One end of the connecting block is provided with a mating inclined surface and the other end is provided with a vertical locking surface. A portion of the connecting block extends into the positioning cylinder.

[0012] The present invention is further configured such that the adjusting component includes a fixed frame rotatably connected to the mounting shell 2, a connecting frame is provided on the side of the fixed frame 1 away from the positioning component, one side of the connecting frame is connected to the spiral screen rod, a plurality of discharge ports are opened on the outer circumference of the fixed frame 1, a toothed cylinder is provided on the other side of the fixed frame 1 and sleeved on the outside of the positioning cylinder, and a transmission gear 2 is rotatably installed inside the mounting shell 2 at a position below the toothed cylinder, and the transmission gear 2 is meshed with the toothed cylinder.

[0013] The present invention is further configured such that a connecting cylinder is provided on the outer wall of the fixed frame at a position corresponding to the inside of the positioning cylinder, one end of the connecting cylinder extends through the positioning cylinder into the storage cavity, a plurality of locking blocks are provided on the outer wall of the connecting cylinder inside the storage cavity, and a docking bolt is provided on the outer wall of the connecting cylinder inside the positioning cylinder at a position corresponding to the inclined groove, one end of the docking bolt extends into the inclined groove and is slidably connected thereto.

[0014] A method of using a tiger nuts production apparatus includes the following steps: S1. Send the tiger nuts into the peeling machine for peeling; S2. The peeled tiger nuts are sent to the polishing mechanism for surface polishing to remove residual skin flakes from the depressions on the tiger nut surface and improve the smoothness of the tiger nut surface. S3. Pour the polished tiger nuts into the protective shell through the receiving trough and let them fall onto the top of the spiral screen rod. S4. Driven by drive unit one and drive unit two, the spiral screen rod is rotated. Under the spiral push of the spiral screen rod and the inclined guide of the bottom plate, the tiger nuts fall and are screened along the screen mechanism. Tiger nuts that meet the particle size of the screen gap pass through the gap of the spiral screen rod and fall into the corresponding receiving port. S5. When it is necessary to adjust the screening particle size, control the drive unit two to rotate in reverse, while drive unit one stops rotating. The locking is released through the cooperation of the tooth assembly and the block one, the positioning assembly locks with the mounting shell two, and the adjustment assembly continues to rotate in reverse, driving the docking bolt to move in the inclined groove, thereby realizing the adjustment of the spiral screen bar spacing.

[0015] The beneficial effects of the tiger nut production apparatus and method of the present invention are as follows: 1. The screening section boasts strong adaptability, resolving issues of missed or mixed classification. The inclined base plate design, in conjunction with the protective shell, guides material movement smoothly and prevents splashing. Drive unit one and drive unit two work in tandem with the spiral screen rods, with varying numbers of spiral screen rods creating multiple screening gap specifications to suit different application requirements. The spiral profile of the spiral screen rods conforms to the irregular ellipsoid of tiger nuts, forcing materials to pass through the screen gaps precisely, effectively preventing missed or mixed classification and significantly improving grading accuracy.

[0016] 2. Gentle screening and material protection, reducing breakage rate. Drive unit one and drive unit two each drive the spiral screen rod to rotate stably through their own components. They are independently driven yet synchronously linked, allowing for flexible speed adjustment to adapt to different raw materials. The spiral design avoids hard contact with materials, reducing friction and collision, lowering the breakage rate of tiger nuts, preventing oil seepage and material sticking, and ensuring smooth screening and material quality.

[0017] 3. Online adjustable particle size enhances adaptability and continuity. The positioning, adjustment, and locking components work together to lock the position and ensure accuracy during normal grading. When diameter adjustment is required, the drive unit rotates in reverse to switch between multiple positions of the spiral screen bar spacing through the cooperation of the connecting bolts and the inclined and straight grooves. This eliminates the need to stop the machine to change screens, reducing time consumption and flexibly adapting to different particle size requirements. Attached Figure Description

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the following description is provided in conjunction with the accompanying drawings. Please provide a detailed explanation.

[0019] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] Figure 1 This is a schematic diagram of the overall connection structure according to an embodiment of the present invention; Figure 2 This is a three-dimensional structural diagram of the screening section according to an embodiment of the present invention; Figure 3 This is a top view of the screening section according to an embodiment of the present invention; Figure 4 This is a diagram of the separation structure of the screening section in an embodiment of the present invention; Figure 5 This is a partial enlarged view of the screen mechanism according to an embodiment of the present invention; Figure 6 This is a cross-sectional view of the driving unit according to an embodiment of the present invention; Figure 7 This is a two-section view of the driving unit according to an embodiment of the present invention; Figure 8 This is a partial diagram of the driving unit two according to an embodiment of the present invention; Figure 9 This is a breakdown diagram of the adjustment components according to an embodiment of the present invention; Figure 10 This is an enlarged view of the positioning component according to an embodiment of the present invention; Figure 11This is a cross-sectional view of the positioning component according to an embodiment of the present invention; Figure 12 This is an enlarged view of the tooth assembly according to an embodiment of the present invention; Figure 13 This is a flowchart illustrating the usage method of the tiger nut production apparatus according to an embodiment of the present invention.

[0021] The diagram is labeled as follows: 1. Screening section; 11. Base plate; 12. Material inlet; 13. Protective shell; 14. Material inlet trough; 2. Screening mechanism; 21. Drive unit one; 211. Mounting shell one; 212. Connecting plate one; 213. Gear ring one; 214. Transmission gear one; 22. Drive unit two; 221. Mounting shell two; 2211. Discharge port; 2212. Transmission gear two; 2213. Connecting gear; 222. Adjustment component; 2221. Fixing frame one; 2222. Discharge port; 2223. Connecting frame; 2224. Gear cylinder; 2225. Connecting cylinder; 2226. Connecting bolt; 2227. Locking Block 1; 223. Positioning Component; 2231. Positioning Cylinder; 22311. Inclined Groove; 22312. Straight Groove; 22313. Mounting Groove; 2232. Fixing Frame 2; 22321. Storage Cavity; 2233. Locking Tooth Component; 22331. Slider 1; 22332. Positioning Tooth; 22333. Connecting Rod; 22334. Connecting Groove; 22335. Elastic Component 1; 22336. Elastic Component 2; 22337. Connecting Block; 22338. Butt Joint Inclined Surface; 22339. Vertical Locking Surface; 23. Spiral Screen Rod; 3. Peeling Mechanism; 4. Polishing Mechanism. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the indicated position or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a transmission connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal communication of two elements or the interaction between two elements.

[0024] Please see Figure 1 - Figure 12 A tiger nuts production apparatus includes: a screening unit 1; The screening section 1 includes a bottom plate 11, a protective shell 13 is provided on the top of the bottom plate 11, a material receiving groove 14 is provided at the top of the protective shell 13, and a screen mechanism 2 is provided at the top of the bottom plate 11 inside the protective shell 13. The screen mechanism 2 includes a drive unit 1 21 and a drive unit 22 disposed on the top of the base plate 11. The drive unit 1 21 is disposed on the top of the base plate 11 near the receiving groove 14. Several drive units 22 are disposed in a horizontal array along the top of the base plate 11. Several spiral screen rods 23 are arranged in a circumferential array between the drive units 1 21 and the drive units 22 and between adjacent drive units 22. The number of spiral screen rods 23 in each group is different. A receiving port 12 is provided through the top of the base plate 11 at the position corresponding to the position of the spiral screen rods 23. It also includes a peeling mechanism 3 for peeling tiger nuts and a polishing mechanism 4 for polishing the surface of tiger nuts. The peeling mechanism 3, the polishing mechanism 4, and the screening unit 1 are connected in sequence through a conveying structure.

[0025] By adopting the above technical solution, drive unit 1 21 and multiple drive units 22 are arranged horizontally along the base plate 11, forming a gradient screening interval in conjunction with different numbers of spiral screen rods 23, so that the material forms a gradual screening motion. The adjustment component 222 inside the mounting shell 221 can realize stepless adjustment of the spacing between the spiral screen rods 23. The peeling mechanism 3 and the polishing mechanism 4 are connected to the receiving trough 14 via a belt conveyor, and the adjustable conveying speed avoids material accumulation. The spiral screen rods 23, together with the receiving port 12 and the discharge port 2211, realize graded discharge.

[0026] The drive unit 21 includes a mounting shell 211 fixedly connected to the base plate 11. A connecting plate 212 is rotatably mounted inside the mounting shell 211 near the drive unit 22. A gear ring 213 is provided on one side of the connecting plate 212 inside the mounting shell 211. A transmission gear 214 is rotatably mounted inside the mounting shell 211 below the gear ring 213. The transmission gear 214 meshes with the gear ring 213. The connecting plate 212 is connected to the spiral screen rod 23 on the side outside the mounting shell 211.

[0027] By adopting the above technical solution, the transmission gear 214 and the gear ring 213 form a reduction gear pair, which can reduce the input speed and increase the torque; the gear ring 213 is fixed to the inner side of the connecting plate 212 by interference fit to achieve stable power transmission. The simple structure realizes the locking of drive and stop, which can be used to deal with the later adjustment of the screen bar spacing.

[0028] The second drive unit 22 includes a second mounting shell 221 fixedly connected to the base plate 11. A positioning component 223 is rotatably mounted inside the second mounting shell 221 near the first drive unit 21. An adjustment component 222 is rotatably mounted inside the second mounting shell 221 away from the first drive unit 21. A discharge port 2211 is provided through the bottom of the second mounting shell 221. The positioning component 223 includes a positioning cylinder 2231 rotatably connected to the second mounting shell 221. Several inclined grooves 22311 are arranged in a circular array on the inner wall of the positioning cylinder 2231. Straight grooves 22312 are formed between the inclined grooves 22311 on the inner wall of the positioning cylinder 2231. Both ends of the straight grooves 22312 are connected to the inclined grooves 22311. The positioning cylinder 2231 is provided with a fixed frame 2232 that is rotatably connected to the mounting shell 221 at one end near the outside of the mounting shell 221. One side of the fixed frame 2232 is connected to the spiral screen rod 23. A storage cavity 22321 is provided inside the fixed frame 2232. An installation groove 22313 is provided on the outer circumference of the positioning cylinder 2231 near the fixed frame 2232. A toothed assembly 2233 is provided inside the installation groove 22313. A mating tooth 2213 is provided inside the mounting shell 221 at the position corresponding to the installation groove 22313.

[0029] By adopting the above technical solution, the inclined groove 22311 and straight groove 22312 of the positioning cylinder 2231 are coupled with the docking bolt 2226. When the adjusting component 222 rotates, the docking bolt 2226 slides to achieve axial displacement and rapid reset, forming a multi-position adjustment. The slider 22331 of the toothed assembly 2233 is linked through the connecting rod 22333. The elastic element 22335 keeps the positioning tooth 22332 and the docking tooth 2213 in a normally closed engagement. The connecting block 22337 cooperates with the locking block 2227 to achieve rigid locking and rapid release. The fixed frame 2232 accommodates the displacement of the connecting cylinder 2225 through the receiving cavity 22321. The positioning cylinder 2231 transmits power to the fixed frame 2232 through the toothed assembly 2233, driving the spiral screen rod 23 to rotate.

[0030] The toothed assembly 2233 includes several sliders 22331 slidably mounted inside the mounting groove 22313. One end of each slider 22331 is provided with a connecting rod 22333 and the other end is provided with a connecting groove 22334. One end of the connecting rod 22333 extends into the connecting groove 22334 of the adjacent slider 22331 and is hinged thereto. The outside of each slider 22331 is provided with positioning teeth 22332. The outer wall of each slider 22331 is provided with an elastic element 22335, one end of which is connected to the mounting groove 22313. The inside of each slider 22331 is provided with an elastic element 22336. The other end of the elastic element 22336 is provided with a connecting block 22337. One end of the connecting block 22337 is provided with a mating slope 22338 and the other end is provided with a vertical locking surface 22339. A portion of the connecting block 22337 extends into the inside of the positioning cylinder 2231.

[0031] By adopting the above technical solution, slider 1 22331 is hinged to the connecting groove 22334 of adjacent slider 1 22331 via connecting rod 22333, forming a ring linkage mechanism. This enables all sliders 1 22331 to move radially synchronously, ensuring that the positioning tooth 22332 and the mating tooth 2213 mesh consistently. Elastic element 1 22335 and elastic element 2 22336 constitute a double elastic locking mechanism.

[0032] The adjusting component 222 includes a fixed frame 2221 rotatably connected to the mounting shell 221. A connecting frame 2223 is provided on the side of the fixed frame 2221 away from the positioning component 223. One side of the connecting frame 2223 is connected to the spiral screen rod 23. Several discharge ports 2222 are opened on the outer circumference of the fixed frame 2221. A toothed cylinder 2224 is provided on the other side of the fixed frame 2221 and sleeved on the outside of the positioning cylinder 2231. A transmission gear 2212 is rotatably installed inside the mounting shell 221 at a position below the toothed cylinder 2224. The transmission gear 2212 is meshed with the toothed cylinder 2224. A connecting cylinder 2225 is provided on the outer wall of the fixed frame 2221 at a position corresponding to the inside of the positioning cylinder 2231. One end of the connecting cylinder 2225 extends through the positioning cylinder 2231 into the storage cavity 22321. Several locking blocks 2227 are provided on the outer wall of the connecting cylinder 2225 inside the storage cavity 22321. A docking bolt 2226 is provided on the outer wall of the connecting cylinder 2225 inside the positioning cylinder 2231 at a position corresponding to the inclined groove 22311. One end of the docking bolt 2226 extends into the inclined groove 22311 and is slidably connected to it.

[0033] By adopting the above technical solution, the gear cylinder 2224 and the transmission gear 2212 form a spur gear pair, transmitting power to the fixed frame 2221. The connecting cylinder 2225 and the positioning cylinder 2231 are in clearance fit, and the connecting bolt 2226 and the inclined groove 22311 form a sliding pair. When the fixed frame 2221 rotates, it drives the connecting bolt 2226 to slide, driving the spiral screen rod 23 to achieve stepless adjustment of the gap. The locking block 2227 and the connecting block 22337 cooperate to form a self-locking structure. When the adjusting component 222 rotates forward, it drives the spiral screen rod 23 to rotate synchronously. When it rotates in the reverse direction, it cooperates with the locking tooth component 2233 to disengage, realizing online adjustment of the screen gap. The extension and retraction stroke of the connecting cylinder 2225 ensures stable adjustment.

[0034] Working principle and usage process of this invention: Based on the entire process logic of tiger nuts from peeling, polishing to screening, the device is composed of a screening unit 1, a peeling mechanism 3, and a polishing mechanism 4 working together. The core is that the screen mechanism 2 of the screening unit 1 adopts a spiral screen rod 23 combination structure, which can adapt to the irregular ellipsoidal material characteristics of tiger nuts, and at the same time realize online adjustable screening particle size control, completely solving the industry pain points of leakage and mixing, clogging and difficult maintenance of general equipment.

[0035] The raw tiger nuts to be processed are fed into the peeling mechanism 3. Through the mechanical kneading and peeling action of the peeling module in the peeling mechanism 3, the seed coat and impurities on the surface of the tiger nuts are removed, completing the basic pretreatment of the raw materials. After peeling, the tiger nuts are conveyed into the polishing mechanism 4. The polishing mechanism 4 uses high-speed friction and the rolling action of flexible polishing rollers to thoroughly polish the surface of the tiger nuts. On the one hand, it removes residual skin and fine impurities in the depressions on the surface of the tiger nuts, and on the other hand, it improves the overall surface smoothness of the tiger nuts, making the surface of the material more uniform.

[0036] The polished tiger nuts are fed into the receiving trough 14 of the screening section 1 by the conveying mechanism. The receiving trough 14 guides the tiger nuts into the top of the screen mechanism 2 inside the protective shell 13. The drive component is started to drive the screen mechanism 2 to run, classifying the polished tiger nuts by particle size. Finally, tiger nuts of different particle sizes are separated and collected, and then conveyed to different receiving ports 12 to complete the discharge.

[0037] The screening section 1 is the core innovative component of this invention. Its screen mechanism 2, through the coordinated operation of drive unit 1 21, drive unit 22, and spiral screen rod 23, achieves precise grading and adjustable particle size of tiger nuts. After polishing, the tiger nuts fall from the receiving trough 14 into the protective shell 13, and finally land on the top of the spiral screen rod 23 of the screen mechanism 2. The bottom plate 11 adopts an inclined design to provide natural guidance for the falling tiger nuts, while the protective shell 13 provides a protective environment for the entire screening process, preventing material splashing. The inclined bottom plate 11, combined with the spiral pushing structure of the spiral screen rod 23, can guide the tiger nuts to move downward at a uniform speed, prolonging the residence time of the material in the screen mechanism 2, improving the screening contact efficiency, and at the same time avoiding incomplete grading caused by material accumulation.

[0038] The top of the base plate 11 is equipped with a drive assembly located at the bottom of the corresponding drive unit 1 21 and drive unit 2 22. After startup, the drive assembly synchronously drives the transmission gear 1 214 and the transmission gear 2 2212 to rotate. The transmission gear 1 214 meshes with the gear ring 1 213 of the drive unit 1 21, driving the gear ring 1 213 to rotate, which in turn drives the connecting disk 1 212 to rotate. The connecting disk 1 212 drives the spiral screen rod 23 to rotate synchronously. The transmission gear 2212 meshes with the gear cylinder 2224 of the drive unit 22, driving the gear cylinder 2224 to rotate, which in turn drives the fixed frame 2221 and the connecting frame 2223 to rotate. The connecting frame 2223 drives another set of spiral screen rods 23 to rotate. The drive unit 21 and the drive unit 22 adopt an independent drive and synchronous linkage design, which can adjust the speed and direction of rotation according to the grading requirements, adapt to the particle size grading parameters of different batches of tiger nuts, and improve the flexibility and adaptability of the device.

[0039] Drive unit 1 21 and drive unit 22 drive their respective connected spiral screen rods 23 to rotate. Multiple spiral screen rods 23 are arranged in a circumferential array, and the number of spiral screen rods 23 varies between drive unit 1 21 and adjacent drive unit 22, as well as between different drive units 22, forming screening gaps with varying spacing. The spiral screen rods 23 themselves have a spiral structure. During rotation, the spiral teeth push the tiger nuts downwards along the screen mechanism 2. Simultaneously, the spiral profile of the spiral screen rod 23 matches the irregular ellipsoidal shape of the tiger nuts, forcing the material to pass through the screening gap with its short diameter fitting the screen gap and its long diameter parallel to the screen rod. The spiral design of the spiral screen rod 23 avoids hard contact with the tiger nuts, reducing material breakage. Furthermore, it effectively prevents the leakage of large, long particles and the mixing of small, round particles due to differences in the aspect ratio of ellipsoidal materials.

[0040] Under normal grading conditions, the toothed assembly 2233 is locked to the first locking block 2227 and rotates synchronously for screening. When the second drive unit 22 rotates in the forward direction, the first fixed frame 2221 drives the connecting cylinder 2225 and the first locking block 2227 to rotate synchronously. The first locking block 2227 engages with the vertical locking surface 22339 of the connecting block 22337 of the toothed assembly 2233, forming a locking engagement. At this time, the connecting block 22337 drives the positioning cylinder 2231 to rotate synchronously through the connecting rod 22333 and the first slider 22331. The positioning cylinder 2231 drives the second fixed frame 2232 to rotate, and then the second fixed frame 2232 drives the corresponding spiral screen rod 23 to rotate.

[0041] During this process, the connecting bolt 2226 is located inside the inclined groove 22311 of the positioning cylinder 2231. Guided and restricted by the inclined groove 22311, its position remains fixed. The adjusting component 222 and the positioning component 223 form a synchronously rotating whole, and the spiral screen rod 23 rotates stably to complete the conventional grading operation. The locking structure of the locking block 2227 and the locking tooth component 2233 can ensure the stability of the spiral screen rod 23 during the grading process and avoid grading errors caused by screen gap deviation. At the same time, the guiding effect of the inclined groove 22311 provides a structural foundation for subsequent particle size adjustment, ensuring the continuity and accuracy of conventional grading.

[0042] When the screening particle size needs to be adjusted, the drive assembly drives drive unit 22 to rotate in the reverse direction, and drive unit 21 stops rotating; transmission gear 2212 drives fixed frame 2221 and connecting frame 2223 to rotate in the reverse direction through gear cylinder 2224, and connecting frame 2223 drives spiral screen rod 23 to rotate in the reverse direction synchronously. At the same time, fixed frame 2221 drives locking block 2227 to rotate in the reverse direction through connecting cylinder 2225; when locking block 2227 rotates in the reverse direction, its end face contacts connecting block 22. When the inclined surfaces 22338 of 337 come into contact, the connecting block 22337 is pushed into the mounting groove 22313 by pressing the inclined surfaces 22338. The connecting block 22337 drives the slider 22331 to compress the elastic element 22335. At this time, the positioning tooth 22332 engages with the mating tooth 2213 inside the mounting shell 221, locking the positioning component 223 to the mounting shell 221. The fixed frame 2232 and the corresponding spiral screen rod 23 stop rotating.

[0043] The fixed frame 2221 rotates continuously in the opposite direction, driving the connecting cylinder 2225 and the docking bolt 2226 to move in the inclined groove 22311. The guiding effect of the inclined groove 22311 drives the connecting cylinder 2225 to push the fixed frame 2221 to move out of the mounting shell 221. One end of the spiral screen rod 23 is affected by the fixed displacement, and the other end moves with the fixed frame 2221, thereby realizing the spiral compression adjustment of the spacing between the spiral screen rods 23. The maximum adjustment distance is determined by the range of movement of the docking bolt 2226 in the inclined groove 22311. When the connecting bolt 2226 moves from one end of the inclined groove 22311 to the other end, it enters the straight groove 22312. The straight groove 22312 loses its guiding restriction, and the connecting bolt 2226 moves quickly along the straight groove 22312 to the other end under the elastic tension of the spiral screen rod 23. The spacing of the spiral screen rod 23 returns to the initial state. The drive unit 22 continues to rotate in the reverse direction, and the connecting bolt 2226 enters the next inclined groove 22311. The above adjustment process is repeated to realize the multi-level and rapid switching adjustment of the spacing of the spiral screen rod 23.

[0044] The reverse rotation drive unit 22 enables online and automatic adjustment of the screening gap without stopping the machine to replace the screen. It can adapt to the grading requirements of tiger nuts with different particle sizes. At the same time, the adjustment process is fast and precise, and multiple gears can be switched within the range, which greatly improves the adaptability and production efficiency of the grading device and solves the defects of existing equipment that cannot adjust the diameter online and that screen replacement is time-consuming.

[0045] During the screening process, tiger nuts that meet the current screen gap size pass directly through the gap between the spiral screen rods 23 and fall into the receiving port 12 of the bottom plate 11 for collection; or they move with the rotation of the spiral screen rods 23 to the inside of the fixed frame 1 2221, and then fall into the receiving port 12 through the discharge port 2222 of the fixed frame 1 2221 and the discharge port 2211 of the mounting shell 221 to complete the graded discharge.

[0046] The tiger nut production apparatus and method of the present invention, through the whole-process design of peeling → polishing → grading by spiral screen 23, combined with the adjustable spiral screen 23 structure of the screening section 1, realizes the integrated processing of tiger nuts from raw materials to graded finished products. The ellipsoidal material adaptation design of the spiral screen 23 completely solves the problem of leakage and mixing in grading caused by the inability of general equipment to adapt to the irregular shape of tiger nuts. The online adjustable screen gap structure also realizes the flexible switching of grading particle size without stopping the machine to change parts, which greatly improves production efficiency. At the same time, the pre-peeling and polishing process provides high-quality raw materials for subsequent grading, reduces processing loss and defect rate, and improves the efficiency and quality of high-value utilization of tiger nuts, fully meeting the processing needs of different scenarios such as seed grade, food grade, and oil extraction grade.

[0047] Please see Figure 13 In another aspect, the present invention provides a method of using a tiger nut production apparatus, comprising the following steps: S1. The tiger nuts are fed into the peeling mechanism 3 for peeling. S2. The peeled tiger nuts are sent to the polishing mechanism 4 for surface polishing to remove residual skin flakes from the depressions on the surface of the tiger nuts and improve the smoothness of the tiger nuts surface. S3. Pour the polished tiger nuts into the protective shell 13 through the receiving trough 14 and let them fall onto the top of the spiral screen rod 23. S4. Driven by drive unit 1 21 and drive unit 22, the spiral screen rod 23 is rotated. Under the spiral push of the spiral screen rod 23 and the inclined guide of the bottom plate 11, the tiger nuts fall along the screen mechanism 2 for screening. The tiger nuts that meet the screen gap particle size pass through the gap of the spiral screen rod 23 and fall into the corresponding receiving port 12. S5. When it is necessary to adjust the screening particle size, control the drive unit 22 to rotate in reverse, while drive unit 21 stops rotating. The locking is released by the cooperation of the tooth assembly 2233 and the locking block 2227. The positioning assembly 223 locks with the mounting shell 221. The adjustment assembly 222 continues to rotate in reverse, driving the docking bolt 2226 to move in the inclined groove 22311, thereby realizing the adjustment of the spacing of the spiral screen rod 23.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for producing tiger nuts, characterized in that, include: Screening section (1); The screening section (1) includes a bottom plate (11), a protective shell (13) is provided on the top of the bottom plate (11), a receiving groove (14) is provided on the top of the protective shell (13), and a screen mechanism (2) is provided on the top of the bottom plate (11) inside the protective shell (13). The screen mechanism (2) includes a drive unit 1 (21) and a drive unit 2 (22) set on the top of the base plate (11). The drive unit 1 (21) is set on the top of the base plate (11) near the receiving trough (14). There are several drive units 2 (22). Several drive units 2 (22) are arranged in a horizontal array along the top of the base plate (11). Several spiral screen rods (23) are arranged in a circular array between the drive unit 1 (21) and the drive unit 2 (22) and between adjacent drive units 2 (22). The number of spiral screen rods (23) in each group is different. The bottom plate (11) has a material receiving port (12) through which the spiral screen rod (23) is opened at the top.

2. The tiger nut production apparatus according to claim 1, characterized in that: It also includes a peeling mechanism (3) for peeling tiger nuts and a polishing mechanism (4) for polishing the surface of tiger nuts. The peeling mechanism (3), polishing mechanism (4) and screening section (1) are connected in sequence through a conveying structure.

3. The tiger nut production apparatus according to claim 1, characterized in that: The drive unit 1 (21) includes a mounting shell 1 (211) fixedly connected to the base plate (11). A connecting plate 1 (212) is rotatably mounted inside the mounting shell 1 (211) near the drive unit 2 (22). A gear ring 1 (213) is provided on one side of the connecting plate 1 (212) inside the mounting shell 1 (211). A transmission gear 1 (214) is rotatably mounted inside the mounting shell 1 (211) below the gear ring 1 (213). The transmission gear 1 (214) meshes with the gear ring 1 (213). The connecting plate 1 (212) is connected to the spiral screen rod (23) on one side outside the mounting shell 1 (211).

4. The tiger nut production apparatus according to claim 1, characterized in that: The second drive unit (22) includes a second mounting shell (221) fixedly connected to the base plate (11). A positioning component (223) is rotatably installed inside the second mounting shell (221) near the first drive unit (21). An adjustment component (222) is rotatably installed inside the second mounting shell (221) away from the first drive unit (21). A discharge port (2211) is provided through the bottom of the second mounting shell (221).

5. The tiger nut production apparatus according to claim 4, characterized in that: The positioning component (223) includes a positioning cylinder (2231) rotatably connected to the mounting shell (221). The inner wall of the positioning cylinder (2231) is provided with a plurality of inclined grooves (22311) arranged in a circular array. The inner wall of the positioning cylinder (2231) is provided with straight grooves (22312) located between the inclined grooves (22311). Both ends of the straight grooves (22312) are connected to the inclined grooves (22311).

6. The tiger nut production apparatus according to claim 5, characterized in that: The positioning cylinder (2231) is provided with a fixed frame (2232) rotatably connected to the mounting shell (221) at one end near the outside of the mounting shell (221). One side of the fixed frame (2232) is connected to the spiral screen rod (23). A receiving cavity (22321) is provided inside the fixed frame (2232). An installation groove (22313) is provided on the outer circumference of the positioning cylinder (2231) near the fixed frame (2232). A toothed assembly (2233) is provided inside the installation groove (22313). A mating tooth (2213) is provided inside the mounting shell (221) at the position corresponding to the installation groove (22313).

7. The tiger nut production apparatus according to claim 6, characterized in that: The toothed assembly (2233) includes a plurality of sliders (22331) slidably mounted inside the mounting groove (22313). One end of each slider (22331) is provided with a connecting rod (22333), and the other end has a connecting groove (22334). One end of the connecting rod (22333) extends into the connecting groove (22334) of an adjacent slider (22331) and is hinged thereto. Positioning teeth (22332) are provided on the outside of each slider (22331). 2331) The outer wall is provided with an elastic element 1 (22335) that is connected to the mounting groove (22313) at one end. The slider 1 (22331) is provided with an elastic element 2 (22336) inside. The other end of the elastic element 2 (22336) is provided with a connecting block (22337). One end of the connecting block (22337) is provided with a mating slope (22338) and the other end is provided with a vertical locking surface (22339). A portion of the connecting block (22337) extends into the positioning cylinder (2231).

8. The tiger nut production apparatus according to claim 4, characterized in that: The adjusting component (222) includes a fixed frame (2221) rotatably connected to the mounting shell (221). A connecting frame (2223) is provided on the side of the fixed frame (2221) away from the positioning component (223). One side of the connecting frame (2223) is connected to the spiral screen rod (23). Several discharge ports (2222) are opened on the outer circumference of the fixed frame (2221). A toothed cylinder (2224) is provided on the other side of the fixed frame (2221) and sleeved on the outside of the positioning cylinder (2231). A transmission gear (2212) is rotatably installed inside the mounting shell (221) below the toothed cylinder (2224). The transmission gear (2212) meshes with the toothed cylinder (2224).

9. A tiger nut production apparatus according to claim 8, characterized in that: A connecting tube (2225) is provided on the outer wall of the fixed frame (2221) at a position corresponding to the inside of the positioning tube (2231). One end of the connecting tube (2225) extends through the positioning tube (2231) into the storage cavity (22321). Several locking blocks (2227) are provided on the outer wall of the connecting tube (2225) inside the storage cavity (22321). A connecting bolt (2226) is provided on the outer wall of the connecting tube (2225) inside the positioning tube (2231) at a position corresponding to the inclined groove (22311). One end of the connecting bolt (2226) extends into the inclined groove (22311) and is slidably connected to it.

10. A method of using the tiger nuts production apparatus according to any one of claims 1 to 9, characterized in that, Includes the following steps: S1. The tiger nuts are sent to the peeling mechanism (3) for peeling. S2. The peeled tiger nuts are sent to the polishing mechanism (4) for surface polishing to remove residual skin flakes in the depressions on the surface of the tiger nuts and improve the smoothness of the tiger nuts surface. S3. Pour the polished tiger nuts into the protective shell (13) through the receiving trough (14) and let them fall on the top of the spiral screen rod (23); S4. Driven by drive unit one (21) and drive unit two (22), the spiral screen rod (23) rotates. Under the spiral push of the spiral screen rod (23) and the inclined guidance of the bottom plate (11), the tiger nuts fall down along the screen mechanism (2) for screening. The tiger nuts that meet the particle size of the screen gap pass through the gap of the spiral screen rod (23) and fall into the corresponding receiving port (12). S5. When it is necessary to adjust the screening particle size, control the drive unit two (22) to rotate in reverse, and at the same time drive unit one (21) stops rotating. The locking is released by the cooperation of the tooth assembly (2233) and the block one (2227). The positioning assembly (223) locks with the mounting shell two (221). The adjustment assembly (222) continues to rotate in reverse, driving the docking bolt (2226) to move in the inclined groove (22311) to realize the adjustment of the spacing of the spiral screen rod (23).

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