A seed coat circulating polishing device

Abstract

The application relates to the technical field of seed processing, and discloses a seed outer skin circulating polishing device which comprises a rack, and a processing assembly is arranged in the rack. The seed outer skin circulating polishing device is characterized in that a feeding sieve is arranged above a polishing piece, a vibrator drives the feeding sieve plate to cooperate with springs to pre-screen seeds, and the seeds meeting the size are uniformly dropped into polishing channels formed between adjacent spacing plates; meanwhile, an adjusting part is in threaded transmission cooperation with a push block through adjusting bolts, drives a limiting plate to slide outside the spacing plate, and adjusts the channel width. The up-down position cooperation structure realizes the pre-screening of the seeds, the orderly dropping of the seeds and the self-adaptive adjustment of the channel width, so that the seeds with different particle sizes can be stably clamped and uniformly polished between the polishing belt and the spacing plate, and the problems of seed deviation, accumulation and uneven polishing are effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of seed treatment technology, specifically to a seed outer skin recycling and grinding device. Background Technology

[0002] Many plant seeds (such as Davidia involucrata and Cycas revoluta) have hard, dense seed coats, often covered with a waxy or cuticle layer. This results in poor water and air permeability, making it difficult for water and oxygen to penetrate the seed, thus inducing seed dormancy. Consequently, under natural conditions, this leads to low germination rates, long germination periods, and uneven seedling emergence. To break seed dormancy and improve germination rates and speeds, mechanical abrasion of the seed coat is usually necessary. By grinding or thinning the impermeable layer of the seed coat, the absorption of water and respiration by the seed are promoted, creating conditions for the radicle to break through the seed coat. This has significant practical implications for forestry seedling cultivation, ecological restoration, and agricultural production.

[0003] However, current methods for polishing seed coats mainly rely on manual hand-held sandpaper or knives, one seed at a time. This is not only labor-intensive and inefficient, but also makes it difficult to ensure consistent and uniform polishing depth. Over-polishing can damage the embryo, while under-polishing can lead to failed hatching, severely impacting seed survival rates and subsequent germination quality. Furthermore, most existing simple polishing equipment uses a single-pass polishing method, lacking a mechanism for cyclical polishing of seeds. This prevents uniform and thorough polishing of the seed coat, failing to meet the needs of large-scale, batch seedling production and hindering improvements in seed treatment efficiency and seedling quality.

[0004] During the conceptualization process, the applicant searched for a large number of patent documents on the patent website, and thus proposed a seed outer skin recycling and polishing device to solve the aforementioned problems. Summary of the Invention

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a seed outer skin recycling and polishing device, which solves the problem that existing technologies are unable to perform batch recycling and polishing of seed outer skin.

[0006] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: including a frame, wherein a processing component is disposed inside the frame; The processing assembly includes a grinding component disposed inside the frame, a feeding screening component disposed inside the frame and above the grinding component, a discharging screening component disposed inside the frame and below the grinding component, and a circulation component disposed at the output end of the discharging screening component.

[0007] Preferably, the grinding component includes two sets of first supports disposed inside the frame. Several sets of partition plates are fixed on the side of the two sets of first supports facing away from the frame. Limit plates are slidably connected to the outer sides of the partition plates. Adjustment parts are provided on the opposite side of the two sets of first supports. Two sets of first rotating shafts are rotatably connected inside the frame. Rollers are fixed on the outer sides of the two sets of first rotating shafts. Grinding belts that fit against one side of the partition plates are drivenly connected to the outer sides of the two sets of rollers. A first motor is fixed on the inner wall of the frame. The first motor is connected to one of the sets of first rotating shafts.

[0008] Preferably, the outer side of the limiting plate is provided with a plurality of moving openings that are adapted to the size of the partition plate, and the plurality of moving openings correspond one-to-one with the positions of the plurality of partition plates.

[0009] Preferably, the width of the grinding belt is greater than the width of the partition plate.

[0010] Preferably, the adjustment part includes four sets of support plates, which are arranged in pairs on opposite sides of the two sets of first brackets. Each of the four sets of support plates is threaded with an adjustment bolt. One end of each of the four sets of limit bolts is rotatably connected to a push block, and the other side of each of the four sets of push blocks is connected to the limit plate.

[0011] Preferably, the feeding screening component includes a second bracket fixed inside the frame and located above the first bracket. A feeding hopper is fixed to the outside of the second bracket. Two sets of crossbeams are fixed inside the feeding hopper. Two sets of springs are fixed to the top of the two sets of crossbeams respectively. A connecting frame is fixed to the top of the four sets of springs. Two sets of sliding grooves are opened on the top of the connecting frame. Inserts are slidably connected inside the two sets of sliding grooves. A feeding screen plate is fixed to the top of the two sets of inserts. A vibrator is fixed to the bottom of the connecting frame.

[0012] Preferably, the outer side of the feed hopper is provided with a maintenance opening corresponding to the position of the second support, and a door is hinged inside the maintenance opening.

[0013] Preferably, the discharge screening component includes a third support disposed inside the frame and located below the grinding component. A screening box is fixed to the outside of the third support. A second rotating shaft is rotatably connected inside the screening box. A primary screen cylinder is fixed to the outside of the second rotating shaft. A secondary screen cylinder is sleeved inside the primary screen cylinder. Synchronous pulleys are fixed to the outside of both the second rotating shaft and one of the first rotating shafts. Synchronous belts are internally connected to the two sets of synchronous pulleys.

[0014] Preferably, one end of the secondary screen cylinder extends to the outside of the primary screen cylinder, and a first discharge port and a second discharge port are respectively opened on the outside of the extended section of the secondary screen cylinder and the outside of the primary screen cylinder; The outer diameter of the primary screen cylinder is equal to the inner diameter of the screening box. The bottom of the screening box is provided with a non-compliant discharge pipe corresponding to the position of the first discharge port. The outer side of the secondary screen cylinder is provided with a collection cover corresponding to the position of the second discharge port. The bottom of the collection cover is connected to a compliant discharge pipe.

[0015] Preferably, the circulation component includes a collection pipe connected to the output end of the non-compliant discharge pipe, the other end of the collection pipe being connected to a circulation sleeve, the internal thread of the circulation sleeve being connected to a spiral feeding shaft, a second motor being fixed to the top end of the circulation sleeve, the output end of the second motor being connected to one end of the spiral feeding shaft, and the top of the circulation sleeve being connected to a return pipe connected to the feed hopper.

[0016] (III) Beneficial Effects Compared with the prior art, the present invention provides a seed outer skin recycling and grinding device, which has the following beneficial effects: 1. This seed outer skin circulation grinding device, by placing the feeding sieve above the grinding components, allows a vibrator to drive the feeding sieve plate in conjunction with a spring to pre-screen the seeds. Seeds of the appropriate size fall evenly into the grinding channel formed between adjacent partition plates. Simultaneously, the adjustment unit, through the threaded transmission between the adjusting bolt and the push block, drives the limiting plate to slide outside the partition plate to adjust the channel width. This upper and lower coordinated structure achieves pre-screening of seeds, orderly feeding, and adaptive adjustment of the channel width, ensuring that seeds of different sizes are stably clamped and uniformly ground between the grinding belt and the partition plates, effectively avoiding problems such as seed deviation, accumulation, and uneven grinding.

[0017] 2. This seed outer skin circulation grinding device connects the first rotating shaft of the grinding component to the second rotating shaft of the discharge screening component via a synchronous pulley, synchronous belt, and discharge screening component. This ensures that the operation of the grinding belt is synchronized with the rotational screening actions of the primary and secondary screening cylinders. The ground seeds directly enter the screening box, where they are graded and screened by the fitted double-stage screening cylinders. Qualified seeds are collected directionally from the second discharge port through a collection hood and qualified seed discharge pipe, while substandard seeds are discharged from the first discharge port through a substandard seed discharge pipe. This synchronized linkage and grading screening structure achieves seamless integration of grinding and screening, ensuring consistent grinding quality of the discharged seeds and significantly improving the overall processing efficiency and operational continuity of the equipment.

[0018] 3. This seed outer shell recycling and grinding device connects the discharge screening component to the collection pipe of the recycling component via a substandard seed discharge pipe. Substandard seeds are guided into the recycling sleeve, where a second motor drives a spiral feeding shaft to rotate, automatically returning the seeds to the feed hopper for further grinding via a return pipe. This achieves automatic recycling and return of substandard seeds. Simultaneously, the feed screen plate forms a sliding connection with the sliding groove on the connecting frame via inserts, facilitating quick disassembly and replacement based on seed particle size. This recycling and matching structure allows the device to achieve batch recycling and grinding without manual sorting and secondary feeding, improving adaptability to different seed types and reducing maintenance difficulty and downtime. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a seed outer skin recycling and polishing device proposed in this invention; Figure 2 This is an overall cross-sectional view of a seed outer skin recycling and polishing device proposed in this invention; Figure 3 This is a schematic diagram of the processing component structure of a seed outer skin recycling and polishing device proposed in this invention; Figure 4 This is a schematic diagram of the grinding component structure of a seed outer skin recycling grinding device proposed in this invention; Figure 5 This invention provides a seed outer skin recycling and grinding device. Figure 4 Enlarged schematic diagram of the structure at point A in the middle; Figure 6 This is a partial structural cross-sectional view of the grinding component of a seed outer skin recycling grinding device proposed in this invention; Figure 7 This is a partial structural diagram of the feeding sieve component of a seed outer skin recycling grinding device proposed in this invention; Figure 8 This is a schematic diagram of the discharge screening component of a seed outer skin recycling grinding device proposed in this invention; Figure 9 This is a cross-sectional view of the discharge screening component of a seed outer skin recycling grinding device proposed in this invention.

[0020] In the diagram: 1. Frame; 2. Processing component; 21. Grinding component; 211. First support; 212. Material separator; 213. Limiting plate; 214. Adjustment part; 2141. Support plate; 2142. Adjustment bolt; 2143. Push block; 215. First rotating shaft; 216. Roller; 217. Grinding belt; 218. First motor; 22. Feed screening component; 221. Second support; 222. Feed hopper; 223. Crossbeam; 224. Spring; 225. Connecting frame; 226. Slide groove; 227. Insert bar; 228. Feed screen plate; 229. Vibrator; 2210. Box door; 23. Discharge screening component; 231. Third support; 232. Screening box; 233. Second rotating shaft; 234. Primary screen cylinder; 235. Secondary screen cylinder; 236. Synchronous pulley; 237. Synchronous belt; 238. Non-compliant discharge pipe; 239. Collection hood; 2310. Compliant discharge pipe; 24. Circulation component; 241. Collection pipe; 242. Circulation sleeve; 243. Screw feed shaft; 244. Second motor; 245. Return pipe. Detailed Implementation

[0021] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1 Please see Figure 1-9 This is the first embodiment of the present invention. This embodiment provides a seed outer skin recycling and polishing device, which can screen seeds to similar sizes and then perform batch recycling and polishing of the outer skin. It includes a frame 1, and a processing component 2 is arranged inside the frame 1.

[0023] It should be noted that rack 1 provides overall mounting support for processing component 2.

[0024] Furthermore, the processing component 2 includes a grinding component 21 disposed inside the frame 1, a feeding screening component 22 disposed inside the frame 1 and above the grinding component 21, a discharge screening component 23 disposed inside the frame 1 and below the grinding component 21, and a circulation component 24 disposed at the output end of the discharge screening component 23.

[0025] This device is suitable for plant seeds with hard, dense seed coats that require mechanical shell-breaking treatment to promote germination, including but not limited to: seeds of hard-shelled plants such as Gleditsia sinensis, Amorpha fruticosa, Prunus persica, Prunus armeniaca, Acacia confusa, Cycas revoluta, and Davidia involucrata. The seed coats of these seeds are often covered with a waxy or cuticle layer, resulting in poor water permeability under natural conditions. After being treated with this device, dormancy can be effectively broken and the germination rate improved.

[0026] Furthermore, the grinding component 21 includes two sets of first supports 211 disposed inside the frame 1. Several sets of partition plates 212 are fixed on the side of the two sets of first supports 211 facing away from the frame 1. Limiting plates 213 are slidably connected to the outer side of the several sets of partition plates 212. Adjustment parts 214 are provided on the side of the two sets of first supports 211 facing away from the frame 1. Two sets of first rotating shafts 215 are rotatably connected inside the frame 1. Rollers 216 are fixed on the outer side of each of the two sets of first rotating shafts 215. Grinding belts 217 that are in contact with one side of the several sets of partition plates 212 are drivenly connected to the outer side of the two sets of rollers 216. A first motor 218 is fixed on the inner wall of the frame 1. The first motor 218 is connected to one of the sets of first rotating shafts 215.

[0027] It should be noted that the first bracket 211 is detachably fixed inside the frame 1 by bolts or snap-fit ​​structure, and different sizes of the separator plate 212 and the limiting plate 213 combination module can be replaced according to the actual particle size range of the seeds to be processed.

[0028] The spacing between adjacent sets of separator plates 212 is similar to the diameter of the corresponding seeds, ensuring that the seeds are arranged unidirectionally and pass through one by one in the channel, avoiding uneven grinding or jamming caused by multiple seeds piling up side by side. The separator plates 212 can be customized according to actual needs, and their height, thickness and adjacent spacing can be adjusted synchronously when the module is replaced to adapt to the processing needs of different batches and varieties of seeds.

[0029] Furthermore, the outer side of the limiting plate 213 is provided with several sets of moving openings that are adapted to the size of the partition plate 212, and the positions of the several sets of moving openings correspond one-to-one with the positions of the several sets of partition plates 212.

[0030] Furthermore, the width of the grinding belt 217 is greater than the width of the partition plate 212.

[0031] It should be noted that the grinding belt 217 is a ring-shaped transmission belt with an abrasive layer on its surface. Its base material is made of rubber or polyurethane, and its surface is coated with abrasive particles such as alumina and silicon carbide through bonding or vulcanization processes. The abrasive particle size can be selected according to the hardness of the seed shell. The back of the grinding belt 217 is the meshing surface that engages with the belt roller 216; its front is the abrasive working surface, which directly contacts the seed outer skin for friction and grinding. The width of the grinding belt 217 is greater than the width of the partition plate 212, ensuring that the entire outer circumference of the seed can fully contact the abrasive working surface when it moves within the channel.

[0032] Furthermore, the adjustment unit 214 includes four sets of support plates 2141. The four sets of support plates 2141 are arranged in pairs on opposite sides of the two sets of first brackets 211. Each of the four sets of support plates 2141 is threaded with an adjustment bolt 2142. One end of each of the four sets of limit bolts 2142 is rotatably connected to a push block 2143. The other side of each of the four sets of push blocks 2143 is connected to a limit plate 213.

[0033] It should be noted that, taking the side surface of the partition plate 212 facing the grinding belt 217 as the reference surface, the horizontal distance between the limiting plate 213 and the reference surface is controlled by the adjusting part 214, and this distance is the width of the grinding channel.

[0034] In use, first measure the thickness or diameter of the seeds to be treated and the thickness of the outer skin. Adjust the channel width to a value slightly lower than the seed thickness and roughly similar to the seed outer skin thickness. This allows the seeds to be slightly clamped within the channel by the grinding belt 217 and the limiting plate 213. This ensures that the seeds can roll and shift with the operation of the grinding belt 217, while also ensuring that the grinding force is concentrated on the seed outer skin without damaging the internal germ. When the adjusting bolt 2142 rotates, the push block 2143 pushes the limiting plate 213 to slide outside the partition plate 212, achieving precise adjustment of the channel width. Once adjusted, it is held in place by a self-locking thread.

[0035] It should also be noted that the abrasive layer on the working surface of the grinding belt 217 adopts an inclined arrangement structure, with the extension direction of the abrasive particles or abrasive stripes forming an acute angle with the movement direction of the grinding belt 217. Within the vertically arranged grinding channel, the seeds are slowed down and tumbled due to the friction of the grinding belt 217 moving upwards. Because the abrasive particles are inclined, the abrasive cutting edges form an oblique contact with the seed coat, producing a cross-shaped grinding pattern on the circumferential surfaces of the seed coat. This oblique contact method avoids the unidirectional grinding blind spots caused by traditional transverse or longitudinal abrasive arrangements, making it easier for the oblique cutting force to penetrate the texture gaps on the seed coat surface, significantly improving the uniformity of grinding on the curved surfaces and dead corners of the seed coat and the efficiency of shell breaking. Simultaneously, the oblique friction force applied to the seeds by the inclined abrasive particles generates an additional rotational torque, promoting more thorough tumbling of the seeds within the vertical channel, further ensuring the consistency of grinding on multiple surfaces of the outer coat, and solving the problems of poor grinding effect and insufficient local grinding in the same arrangement direction.

[0036] Furthermore, the feeding screening component 22 includes a second support 221 fixed inside the frame 1 and located above the first support 211. A feeding hopper 222 is fixed to the outside of the second support 221. Two sets of crossbeams 223 are fixed inside the feeding hopper 222. Two sets of springs 224 are fixed to the top of the two sets of crossbeams 223 respectively. A connecting frame 225 is fixed to the top of the four sets of springs 224. Two sets of sliding grooves 226 are opened on the top of the connecting frame 225. Inserts 227 are slidably connected inside the two sets of sliding grooves 226. A feeding screen plate 228 is fixed to the top of the two sets of inserts 227. A vibrator 229 is fixed to the bottom of the connecting frame 225.

[0037] Furthermore, a maintenance opening corresponding to the position of the second support 221 is provided on the outer side of the feed hopper 222, and a door 2210 is hinged inside the maintenance opening.

[0038] It should be noted that this device can be set up in several groups in parallel according to production scale requirements to form a seed outer skin grinding production line. The screen size of the feed sieve plate 228 of each parallel device is arranged in ascending order. The seeds are pre-sorted into different size types by the feed sieve plate 228, and each size type corresponds to one device for grinding. This arrangement can avoid the problem of inconsistent grinding depth caused by seeds of different sizes entering the same grinding channel. The spacing of the partition plates 212 and the position of the limiting plates 213 in each device are pre-customized and adjusted according to the seed size type parameters to achieve graded and specification-based batch grinding processing.

[0039] Secondly, the bottom or side wall of the feed hopper 222 is provided with a discharge port, and a baffle or slide valve is hinged to the discharge port. During the feeding and screening process, seeds that are too large to pass through the feed screen plate 228 remain on the surface of the feed screen plate 228 and can be manually removed by opening the box door 2210; debris and dust that are too small to pass through the feed screen plate 228 but fail to fall into the grinding channel are discharged and collected through the discharge port at the bottom of the feed hopper 222. In addition, the bottom plate of the feed hopper 222 can be designed as a guide slope inclined towards the discharge port, which facilitates the automatic collection and discharge of fine impurities under the action of gravity.

[0040] Working principle: Seeds are fed into the feed hopper 222. The feed screen plate 228 vibrates and screens the seeds under the drive of the vibrator 229. Spring 224 provides elastic return support for the connecting frame 225. Crossbeam 223 supports spring 224. Insert strip 227 slides in the slide groove 226 to realize the insertion and installation of feed screen plate 228. Seeds that meet the size requirements pass through feed screen plate 228 and fall downwards. Second bracket 221 provides fixed support for feed hopper 222. Box door 2210 closes the maintenance port on the outside of feed hopper 222. Seeds fall into... Within the grinding channel formed between adjacent partition plates 212, a limiting plate 213 laterally limits the seeds, an adjusting bolt 2142 rotates on a support plate 2141, and a pusher 2143 moves with the adjusting bolt 2142 and pushes the limiting plate 213 to slide outside the partition plate 212 to adjust the width of the grinding channel. A first bracket 211 provides fixed support for the partition plate 212. A first motor 218 drives a first rotating shaft 215 and a belt roller 216 to rotate, and a grinding belt 217 rotates to rub and grind the seed coat that falls into the grinding channel.

[0041] In summary, this seed outer skin circulation grinding device, by placing the feeding sieve 22 above the grinding component 21, allows the vibrator 229 to drive the feeding sieve plate 228 in conjunction with the spring 224 to pre-screen the seeds. Seeds of the correct size fall evenly into the grinding channel formed between adjacent partition plates 212. At the same time, the adjusting part 214 drives the limiting plate 213 to slide outside the partition plate 212 through the threaded transmission of the adjusting bolt 2142 and the push block 2143, thereby adjusting the channel width. This ensures that seeds of different sizes can be stably clamped and uniformly ground between the grinding belt 217 and the partition plate 212, effectively solving the problems of high labor intensity, inconsistent grinding depth, and easy seed displacement and accumulation caused by manual grinding. It also ensures the orderly passage and uniform grinding of seeds of similar size in a unified channel.

[0042] Example 2 Please see Figure 1-9This is the second embodiment of the present invention, which differs from the first embodiment in that it can perform size screening on the seeds after grinding, and circulate the seeds that are not properly ground to the grinding processing part for further grinding. It also includes: the discharge screening component 23 includes a third support 231 disposed inside the frame 1 and located below the grinding component 21. A screening box 232 is fixed on the outside of the third support 231. A second rotating shaft 233 is rotatably connected inside the screening box 232. A primary screen cylinder 234 is fixed on the outside of the second rotating shaft 233. A secondary screen cylinder 235 is sleeved inside the primary screen cylinder 234. A synchronous pulley 236 is fixed on the outside of both the second rotating shaft 233 and one of the first rotating shafts 215. A synchronous belt 237 is internally connected to the two sets of synchronous pulleys 236.

[0043] It should be noted that the diameter ratio of the two sets of synchronous pulleys 236 is between 1:1 and 1:2, preferably 1:1, so that the first rotating shaft 215 and the second rotating shaft 233 maintain synchronous operation at the same speed or at reduced speed, ensuring that the grinding cycle matches the screening cycle. The synchronous pulleys 236 are toothed pulleys, and the synchronous belt 237 is a synchronous toothed belt with corresponding tooth shape, which avoids slippage through meshing transmission. The synchronous pulleys 236 are provided with flanges on both sides, and the wrap angle of the synchronous belt 237 is not less than 120°. The frame 1 is provided with a tensioning wheel or an adjustable mounting seat to adjust the tension of the synchronous belt 237, prevent belt slippage, and ensure transmission stability.

[0044] Furthermore, one end of the secondary screen cylinder 235 extends to the outside of the primary screen cylinder 234, and the outer side of the extension of the secondary screen cylinder 235 and the outer side of the primary screen cylinder 234 are respectively provided with a first discharge port and a second discharge port.

[0045] Furthermore, the outer diameter of the primary screen cylinder 234 is equal to the inner diameter of the screening box 232. The bottom of the screening box 232 is provided with a non-compliant discharge pipe 238 corresponding to the position of the first discharge port. The outer side of the secondary screen cylinder 235 is provided with a collection cover 239 corresponding to the position of the second discharge port. The bottom of the collection cover 239 is connected to a compliant discharge pipe 2310.

[0046] Specifically, the primary sieve cylinder 234 and the secondary sieve cylinder 235 are coaxially mounted double-layer roller structures, both fixed on the second rotating shaft 233 and rotating synchronously. The primary sieve cylinder 234 has a first sieve hole in its wall, and the secondary sieve cylinder 235 has a second sieve hole in its wall. The diameter of the first sieve hole is larger than that of the second sieve hole. The seed coat needs to be polished on multiple sides to improve the germination probability; therefore, the seeds must undergo multiple polishing processes before passing through the secondary sieve cylinder 235. After being polished, the seeds enter the primary sieve cylinder 234 and undergo tumbling and lifting motions as the cylinder rotates. Substandard seeds that are not properly polished, have insufficient outer skin expansion, or are too large in size cannot pass through the first sieve hole and are guided and pushed to the first discharge port by the inner wall of the first-stage sieve cylinder 234, and discharged through the substandard seed discharge pipe 238.

[0047] Compliant seeds and fine debris pass through the first sieve hole into the interlayer between the primary sieve cylinder 234 and the secondary sieve cylinder 235. The compliant seeds are intercepted by the secondary sieve cylinder 235 and pushed to the second discharge port by the guide vanes, and then discharged through the collection cover 239 and the compliant discharge pipe 2310.

[0048] Fine dust and debris pass through the second sieve holes and fall into the bottom of the screening box 232, where they are collected and cleaned through an additional discharge port at the bottom.

[0049] Furthermore, the circulation component 24 includes a collection pipe 241 connected to the output end of the substandard discharge pipe 238, and the other end of the collection pipe 241 is connected to a circulation sleeve 242. The internal thread of the circulation sleeve 242 is connected to a spiral feeding shaft 243. A second motor 244 is fixed at the top end of the circulation sleeve 242. The output end of the second motor 244 is connected to one end of the spiral feeding shaft 243. The top of the circulation sleeve 242 is connected to a return pipe 245 connected to the feed hopper 222.

[0050] It should be noted that both the first motor 218 and the second motor 244 are geared motors or variable frequency speed control motors, which can adjust the output speed according to the load to adapt to the grinding and feeding requirements of seeds with different hardness. The vibrator 229 is an electromagnetic vibrator or an eccentric block vibrating motor, which controls the screening efficiency and material discharge speed of the feed screen plate 228 by adjusting the amplitude and vibration frequency. Each motor is equipped with an independent start / stop control switch and can be connected to a unified PLC control system to achieve linkage control.

[0051] Understandably, exposed drive components, such as the first motor 218, synchronous pulley 236, synchronous belt 237, and first shaft 215, are all equipped with protective covers that completely enclose them. A flexible dust cover is fitted over the outer side of the spring 224 to prevent dust and debris from entering the gaps and affecting its elasticity. The tops of the circulating sleeve 242 and the screw feed shaft 243 are sealed with end caps, and the second motor 244 is fixed to the end caps via a flange. Each protective structure is equipped with heat dissipation holes or observation windows, and safety interlock devices are installed in necessary locations to ensure that the motor automatically shuts down when the protective cover is opened.

[0052] Working principle: After grinding, the seeds fall into the screening box 232. The second rotating shaft 233 drives the first-stage screening cylinder 234 and the second-stage screening cylinder 235 to rotate for grading and screening. The synchronous pulley 236 rotates synchronously with the first rotating shaft 215. The synchronous belt 237 drives the second rotating shaft 233 to maintain synchronous operation. The third bracket 231 provides fixed support for the screening box 232. The substandard seeds screened out by the first-stage screening cylinder 234 fall into the substandard seed discharge pipe 238. The compliant seeds screened out by the second-stage screening cylinder 235 fall into the collection hood 239. The compliant seed discharge pipe 2310 discharges the compliant seeds downwards for collection. The collection pipe 241 receives the substandard seeds discharged from the substandard seed discharge pipe 238 and guides them into the circulation sleeve 242. The second motor 244 drives the spiral feeding shaft 243 to rotate and lift the substandard seeds upwards for conveying. The return pipe 245 sends the substandard seeds back into the feed hopper 222 for further grinding.

[0053] In summary, this seed outer skin recycling and grinding device performs two-stage screening of the ground seeds through the discharge screening component 23, effectively separating compliant seeds from those that do not meet the grinding standards. Simultaneously, the discharge screening component 23 connects to the collection pipe 241 of the recycling component 24 via the substandard seed discharge pipe 238, guiding the substandard seeds into the recycling sleeve 242. The second motor 244 drives the spiral feeding shaft 243 to rotate, automatically returning the seeds to the feed hopper 222 for re-grinding through the return pipe 245. This achieves automatic recycling and re-grinding of substandard seeds, eliminating the need for manual sorting and secondary feeding. It truly solves the problems of insufficient single-pass grinding and inability to automatically recycle existing technologies, ensuring the consistency of the ground seed quality and significantly improving the automation level, processing efficiency, and operational continuity of the equipment.

[0054] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A seed outer skin recycling and grinding device, characterized in that: Includes a rack (1), and a processing component (2) is provided inside the rack (1); The processing component (2) includes a grinding component (21) disposed inside the frame (1), a feeding screen (22) disposed inside the frame (1) and above the grinding component (21), a discharge screen (23) disposed inside the frame (1) and below the grinding component (21), and a circulation component (24) disposed at the output end of the discharge screen (23).

2. The seed outer skin recycling and polishing device according to claim 1, characterized in that: The grinding component (21) includes two sets of first supports (211) disposed inside the frame (1). Several sets of partition plates (212) are fixed on the side of the two sets of first supports (211) facing away from the frame (1). Limiting plates (213) are slidably connected to the outer side of the several sets of partition plates (212). Adjustment parts (214) are provided on the side of the two sets of first supports (211) facing away from the frame (1). Two sets of first rotating shafts (215) are rotatably connected inside the frame (1). Rollers (216) are fixed on the outer side of the two sets of first rotating shafts (215). Grinding belts (217) that are in contact with one side of the several sets of partition plates (212) are drivenly connected to the outer side of the two sets of rollers (216). A first motor (218) is fixed on the inner wall of the frame (1). The first motor (218) is connected to one of the sets of first rotating shafts (215).

3. The seed outer skin circulation grinding device according to claim 2, characterized in that: The outer side of the limiting plate (213) is provided with a number of moving openings that are adapted to the size of the partition plate (212), and the number of moving openings corresponds one-to-one with the positions of the partition plates (212).

4. The seed outer skin circulation grinding device according to claim 3, characterized in that: The width of the grinding belt (217) is greater than the width of the separator plate (212).

5. The seed outer skin circulation grinding device according to claim 4, characterized in that: The adjustment part (214) includes four sets of support plates (2141). The four sets of support plates (2141) are arranged in pairs on opposite sides of the two sets of first brackets (211). The interior of each of the four sets of support plates (2141) is threaded with an adjustment bolt (2142). One end of each of the four sets of limit bolts (2142) is rotatably connected to a push block (2143). The other side of each of the four sets of push blocks (2143) is connected to the limit plate (213).

6. The seed outer skin recycling and polishing device according to claim 1, characterized in that: The feeding screening component (22) includes a second support (221) fixed inside the frame (1) and located above the first support (211). A feeding hopper (222) is fixed on the outside of the second support (221). Two sets of crossbeams (223) are fixed inside the feeding hopper (222). Two sets of springs (224) are fixed on the top of the two sets of crossbeams (223). A connecting frame (225) is fixed on the top of the four sets of springs (224). Two sets of sliding grooves (226) are opened on the top of the connecting frame (225). Inserts (227) are slidably connected inside the two sets of sliding grooves (226). A feeding screen plate (228) is fixed on the top of the two sets of inserts (227). A vibrator (229) is fixed on the bottom of the connecting frame (225).

7. The seed outer skin recycling and polishing device according to claim 6, characterized in that: The feed hopper (222) has a maintenance opening on its outer side that corresponds to the position of the second support (221), and a door (2210) is hinged inside the maintenance opening.

8. The seed outer skin circulation grinding device according to claim 2, characterized in that: The discharge screening component (23) includes a third support (231) disposed inside the frame (1) and located below the grinding component (21). A screening box (232) is fixed on the outside of the third support (231). A second rotating shaft (233) is rotatably connected inside the screening box (232). A first-stage screen cylinder (234) is fixed on the outside of the second rotating shaft (233). A second-stage screen cylinder (235) is sleeved inside the first-stage screen cylinder (234). A synchronous pulley (236) is fixed on the outside of both the second rotating shaft (233) and one of the first rotating shafts (215). A synchronous belt (237) is internally connected to the two sets of synchronous pulleys (236).

9. The seed outer skin recycling and polishing device according to claim 8, characterized in that: One end of the secondary screen cylinder (235) extends to the outside of the primary screen cylinder (234), and the outer side of the extension section of the secondary screen cylinder (235) and the outer side of the primary screen cylinder (234) are respectively provided with a first discharge port and a second discharge port. The outer diameter of the primary screen cylinder (234) is equal to the inner diameter of the screening box (232). The bottom of the screening box (232) is provided with a non-compliant discharge pipe (238) corresponding to the position of the first discharge port. The outer side of the secondary screen cylinder (235) is provided with a collection cover (239) corresponding to the position of the second discharge port. The bottom of the collection cover (239) is connected to a compliant discharge pipe (2310).

10. The seed outer skin recycling and polishing device according to claim 6, characterized in that: The circulation component (24) includes a collection pipe (241) connected to the output end of the substandard discharge pipe (238), and the other end of the collection pipe (241) is connected to a circulation sleeve (242). The internal thread of the circulation sleeve (242) is connected to a spiral feeding shaft (243). A second motor (244) is fixed at the top end of the circulation sleeve (242). The output end of the second motor (244) is connected to one end of the spiral feeding shaft (243). The top of the circulation sleeve (242) is connected to a return pipe (245) connected to the feed hopper (222).

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