Manual control type camel hair chenopodium album seed harvesting device

Abstract

The invention discloses a manual control type camel hair chenopodium album seed harvesting device which comprises a collecting part used for harvesting seeds from stock plants, a grading part used for grading the harvested seeds according to the weight is arranged at one end of the collecting part, and an impurity removing part used for pretreating the seeds before grading is arranged in the grading part; according to the seed grading device, a directional airflow field is formed through an L-shaped channel, a symmetrical and staggered distribution mode of the collecting pieces is combined, accurate grading is achieved through kinetic energy differences of seeds of different weights, and the differentiated requirements of different scenes such as breeding and ecological restoration for the seed quality are met; seeds are prevented from impacting and damaging seed coats, the seeds can be guided to accurately gather into the collecting groove, the inclined guiding of the flow guide block in the collecting cavity is matched, it is ensured that the seeds are smoothly discharged from the discharging pipe without residue accumulation, fine light impurities in secondary screening can be synchronously removed through a negative pressure adsorption structure of the ox horn type guide block and the air pump, the purity of the graded seeds is improved, and the quality of the graded seeds is improved. And subsequent treatment procedures are reduced.

Description

Technical Field

[0001] This invention relates to the field of seed harvesting equipment technology, specifically a manual-controlled camel hair gooseberry seed harvesting device. Background Technology

[0002] The seeds of *Chenopodium album* are the reproductive organs of perennial shrubs or semi-shrubs belonging to the genus *Chenopodium album* of the family Chenopodiaceae. They are enclosed in fruits with white or pale yellow radial hairs and are oval or elliptical in shape. Harvesting *Chenopodium album* seeds refers to collecting mature fruit clusters from healthy, disease-free mother plants during the critical window period of seed maturity to avoid losses caused by natural seed shedding. This is done through manual picking, pruning, or mechanical operations such as improved grain harvesters or specialized seed harvesters, under clear, windless weather conditions.

[0003] Chinese Patent Publication No. CN217363848U discloses a hand-controlled camel hair gooseberry seed harvesting device. Its structure includes an electric telescopic rod, the output end of which is connected to a wind tunnel. The wind tunnel is connected to a collection hopper, on which lower and upper toothed parts are symmetrically arranged. A vacuum suction head is embedded in the inner wall of the wind tunnel and connected to an external vacuum pump. A locator is connected to the bottom of the wind tunnel, and a seed bag is fitted onto the locator. This invention, through the coordinated use of the upper and lower toothed parts and the wind tunnel, can mechanically complete the harvesting process of camel hair gooseberry seeds. Compared with traditional manual harvesting, it can greatly improve harvesting efficiency and reduce the workload of workers.

[0004] However, the aforementioned existing technologies have the following shortcomings: During use, although mechanical harvesting can be achieved to improve efficiency and reduce labor intensity, it is impossible to grade and screen the harvested seeds according to quality. Seeds of different weights and plumpness are mixed together, requiring subsequent grading of the harvested seeds, resulting in additional manual sorting processes. This not only increases the overall operating cost but also prolongs the post-harvest processing cycle. At the same time, during the secondary screening process, seeds are prone to collisions due to repeated handling and friction, further aggravating seed coat damage and reducing seed germination rate. In addition, some lightweight seeds may be lost during secondary processing, affecting the overall seed utilization rate and making it difficult to quickly adapt to the immediate seed needs of different scenarios. Summary of the Invention

[0005] The purpose of this invention is to address the problem that while mechanical harvesting can improve efficiency and reduce labor intensity, it cannot grade and screen harvested seeds according to quality. Seeds of different weights and plumpness are mixed together, requiring subsequent grading and adding extra manual sorting steps. This not only increases overall operating costs but also prolongs the seed processing cycle. Furthermore, during the secondary screening process, seeds are prone to collisions due to repeated handling and friction, further aggravating seed coat damage and reducing germination rates. Some lightweight seeds may also be lost during secondary processing, affecting overall seed utilization and making it difficult to quickly adapt to the immediate seed needs of different scenarios. Therefore, this invention provides a hand-controlled quinoa seed harvesting device.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a hand-controlled camel hair quinoa seed harvesting device, comprising: a collection component for harvesting seeds from the mother plant, one end of the collection component being provided with a grading component for grading the harvested seeds by weight, and the grading component being provided with a seed pretreatment component for removing impurities before grading. The grading component includes a zigzag channel with a bullhorn-shaped guide block fixed to one end of its outlet, leaving a gap between the guide block and the other end of the channel outlet. The guide block is hollow, with multiple sets of connecting holes on its top arc surface. The guide block faces downward and is located above the gap in the middle of the grading tube. Multiple sets of air pumps are fixed on the straight surface, with the air pump's suction end penetrating the bottom straight surface of the guide block. A discharge block is fixed at the bottom of the gap in the middle of the grading tube, with its side end being V-shaped. Multiple sets of symmetrically staggered collecting components are fixed inside the vertical tube on the side of the channel away from the inlet. The collecting component includes a triangular shell fixed to the inside of the channel. Its two inclined surfaces are concave arc surfaces and are V-shaped. A collecting cavity is opened inside the shell. A collecting groove is opened through the upward concave arc surface and communicates with the collecting cavity. In this process, after the collector collects the seeds, the seeds fall into the shaped channel under gravity. After being pre-cleaned by the impurity remover, normal seeds of different weights move upward along the vertical tube into the collection area. The heavier seeds consume kinetic energy quickly and are guided by the downward arc surface of the lower collection device to fall onto the upward arc surface of another set of collection devices. They then enter the collection chamber through the collection groove. When the slightly lighter seeds move upward to the point where they can no longer continue, they are similarly guided and collected by the corresponding collection device, thus achieving graded harvesting.

[0007] As a further embodiment of the present invention: the bottom end of the collection chamber is fixed with a guide block, the upward contact surface of which with the seeds is an inclined surface, and the outer shell side end of the lowest point of the inclined surface is connected to the discharge pipe and communicates with the collection chamber.

[0008] As a further embodiment of the present invention: the collecting device includes a V-shaped bucket, with a slot extending through one side of the bucket. An installation groove is formed on the outer side of the slot end of the bucket. An L-shaped pull rod is slidably inserted into the installation groove, with the long arm of the L-shaped pull rod passing through the installation groove and the short arm located on one side of the bucket. A spring is fixedly connected to the inner side of the short arm of the L-shaped pull rod, with one end of the spring fixedly connected to one side of the bucket. A locking plate is fixedly connected to one end of the pull rod, and the width and length of the locking plate are consistent with the slot. Initially, the spring is in a contracted state, causing the locking plate to overlap with the slot. During use, the pull rod is manually pulled to extend the spring, causing the locking plate to misalign with the slot, exposing the slot and allowing the mother plant to be inserted into it. Then, the pull rod is released, causing the spring to contract, locking the mother plant in place with the locking plate and slot.

[0009] As a further embodiment of the present invention: a handle is fixedly connected to the outside of the bucket, a material drop chute is opened through the bottom of the bucket, a connecting pipe is fixedly connected to the bottom of the bucket, one end of the connecting pipe is connected to the material drop chute, and the other end of the connecting pipe is connected to the feed inlet of the U-shaped channel.

[0010] As a further embodiment of the present invention: the impurity removal component includes a lifting groove inside a vertical pipe on one side of the channel feed inlet, and a discharge groove is provided through the inner side of the lifting groove. The discharge groove is located on the side near the discharge block and is set above the discharge block. An electric push rod is fixedly connected to the bottom of the lifting groove. A screen plate is fixedly connected to the top of the movable rod of the electric push rod. The screen plate is in an inclined state, with the side near the discharge groove being the lowest surface, and the side ends of the screen plate abut against the inner side of the lifting groove or the inner side of the channel respectively.

[0011] As a further embodiment of the present invention: a T-shaped rotating shaft is rotatably provided at the top of the sieve plate, and the rotating shaft passes through the sieve plate. An outer rod is fixedly connected to the outer circular surface of the rotating shaft, and the cross-section of the outer rod is U-shaped. An inner rod is slidably inserted into the U-shaped cross-section. The bottom ends of the inner rod and the outer rod are flush and abut against the top of the sieve plate. A second spring is fixedly connected inside the outer rod. One end of the second spring is fixedly connected to the inner rod. In the initial state, the second spring pushes the inner rod out of the outer rod to the limit position.

[0012] As a further embodiment of the present invention: the bottom end of the rotating shaft passes through the sieve plate and is fixedly connected to a universal coupling. One end of the universal coupling is fixedly connected to a plug rod. A spiral guide strip is wound around the outer surface of the plug rod. An installation rod is fixedly connected inside the channel. A plug cylinder is fixedly connected to the top end of the installation rod. The plug cylinder is located directly below the plug rod. A guide groove adapted to the spiral guide strip is opened on the inner wall of the plug cylinder.

[0013] As a further embodiment of the present invention: a magnetic block is embedded in the side end of the sieve plate, and a magnetic block is also embedded in the top of the interior of the waste removal trough. The magnetic properties of the magnetic block in the side end of the sieve plate are greater than those of the magnetic block in the top of the interior of the waste removal trough. A sliding groove is formed inside the lifting groove, and the sliding groove is connected to the waste removal trough. An L-shaped baffle is slidably connected in the sliding groove, and the long arm of the L-shaped baffle is disposed in the sliding groove. The short arm of the L-shaped baffle extends into the waste removal trough and is magnetically attracted to the magnetic block embedded in the top of the interior of the waste removal trough. In the initial state, the L-shaped baffle and the top of the interior of the waste removal trough are connected by a magnetic block. The magnetic blocks attract the material, causing the baffle to block the waste discharge trough. When the electric actuator moves the screen plate downward, the insert rod and insert cylinder work together, causing the inner and outer rods to push the harvested material accumulated on the screen plate. During the screening process, the magnetic blocks embedded on the side of the screen plate come into contact with the baffle and generate magnetic attraction, causing the baffle to move downward synchronously with the screen plate, exposing the waste discharge trough. When the screen plate moves to the side of the waste discharge trough, under the rotation of the inner and outer rods and the tilting action of the screen plate, the impurities that cannot pass through the filter holes on the screen plate pass through the waste discharge trough and are discharged by the discharge block.

[0014] As a further embodiment of the present invention: a movable groove is formed inside the vertical pipe on one side of the channel inlet. The plane of the movable groove forms a 90-degree angle with the plane of the lifting groove. A sliding rod is slidably connected inside the movable groove. An L-shaped blocking plate is fixedly connected to the side end of the sliding rod. The top surface of the L-shaped blocking plate is inclined, with the inclination direction away from the lifting groove. A dividing block is fixedly connected inside the vertical pipe on one side of the channel inlet, away from the lifting groove. The top surface of the dividing block is inclined, with the inclination direction towards the lifting groove. In the initial state, the top of the blocking plate is higher than the top of the dividing block. As the screen plate moves down, under the magnetic action of the magnetic block embedded on the side end of the screen plate, the blocking plate moves down synchronously until one end of the dividing block abuts against the blocking plate, forming a partition inside the channel.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, the V-shaped bucket's arc-shaped inner wall fits snugly against the fruit ears, and the elastic clamping structure of the slot and plate achieves precise fixation of the mother plant branches, preventing seed loss due to branch displacement during harvesting. With the automatic reset function of the spring, there is no need to manually adjust the clamping force, simplifying the harvesting process and improving the harvesting efficiency per plant. The seamless connection between the discharge chute and the connecting pipe allows the harvested seeds to be directly and directionally transported to the zigzag channel, reducing ground loss. At the same time, the ergonomic design of the handle reduces the labor intensity of bending over and raising hands, making it suitable for long-term field harvesting scenarios. 2. In this invention, the directional airflow field formed by the zigzag channel, combined with the symmetrical and staggered distribution of the collecting components, utilizes the kinetic energy difference of seeds of different weights to achieve precise grading, meeting the differentiated needs for seed quality in different scenarios such as breeding and ecological restoration. The triangular outer shell of the collecting components adopts an inwardly concave arc surface design, which not only avoids seed impact and damage to the seed coat, but also guides the seeds to accurately converge into the collecting trough. With the inclined guidance of the guide block in the collecting cavity, it ensures that the seeds are smoothly discharged from the discharge pipe without any residue accumulation. The horn-shaped guide block and the negative pressure adsorption structure of the air pump can simultaneously remove fine light impurities in the secondary screening, improve the purity of the graded seeds, and reduce subsequent processing steps. 3. This invention utilizes an integrated design that drives the lifting and rotation of the sieve plate via an electric actuator, combined with the elastic fit of the outer and inner rods, to achieve dynamic sieving of the harvested material. Compared to static sieves, this significantly improves the separation efficiency of coarse impurities and seeds, and can adapt to materials with different stacking thicknesses. Magnetic adsorption enables the linkage control of the L-shaped baffle, L-shaped blocking plate, and sieve plate, ensuring that the discharge trough opens as needed to discharge coarse impurities. The L-shaped blocking plate and the dividing block also prevent untreated seeds from entering the grading process, improving grading purity. The spiral guiding structure of the insert rod and cylinder converts linear motion into rotational power, driving the outer and inner rods to evenly push the material, ensuring that the sieve plate filter holes are not clogged. Simultaneously, the adaptability of the spring allows it to fit the sieve plate to clean residual impurities, ensuring thorough impurity removal. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the overall structure in this invention; Figure 3 This is a schematic diagram of the structure of the acquisition component in this invention; Figure 4 This is a schematic diagram of the tie rod structure in this invention; Figure 5 This is a schematic diagram of the structure of the grading component in this invention; Figure 6 In this invention Figure 5 A schematic diagram of the structure at point A; Figure 7 In this invention Figure 5 A schematic diagram of the structure at point B; Figure 8 This is a schematic diagram of the flow guide block in this invention; Figure 9 This is a schematic diagram of the lifting groove in this invention; Figure 10 This is a schematic diagram of the sieve plate in this invention; Figure 11 In this invention Figure 10 A schematic diagram of the structure at point C; Figure 12 This is a schematic diagram of the sealing plate in this invention; Figure 13 This is a schematic diagram of the baffle structure in this invention.

[0017] In the diagram: 1. Collection component; 11. Bucket; 12. Chute; 13. Handle; 14. Slot; 15. Mounting slot; 16. Tie rod; 17. Clamping plate; 18. Spring 1; 19. Connecting pipe; 2. Grading component; 21. Channel; 22. Guide block; 23. Air pump; 24. Discharge block; 25. Collection component; 251. Outer shell; 252. Collection chamber; 253. Collection trough; 254. Flow guide block; 255. 3. Discharge pipe; 3. Impurity removal parts; 31. Lifting trough; 32. Impurity discharge trough; 33. Moving trough; 34. Electric actuator; 35. Screen plate; 36. Rotating shaft; 37. Outer rod; 38. Inner rod; 39. Spring II; 310. Universal coupling; 311. Insert rod; 312. Mounting rod; 313. Insert cylinder; 314. Sliding rod; 315. Sealing plate; 316. Dividing block; 317. Sliding trough; 318. Baffle. Detailed Implementation

[0018] 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.

[0019] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0020] Reference Figures 1 to 2 In this embodiment of the invention, a hand-controlled camel hair quinoa seed harvesting device includes: a collection component 1 for harvesting seeds from the mother plant, a grading component 2 for grading the harvested seeds by weight at one end of the collection component 1, and a purification component 3 for pre-treating the seeds before grading within the grading component 2.

[0021] Reference Figures 3 to 4The collection component 1 includes a V-shaped bucket 11, a slot 14, an installation groove 15, an L-shaped pull rod 16, a locking plate 17, a spring 18, a handle 13, a discharge chute 12, and a connecting pipe 19. The V-shaped bucket 11 is made of high-strength lightweight alloy material, with symmetrical arc-shaped designs on both sides of the bucket wall. The front edge is ground into a sharp cutting edge to facilitate the removal of seeds from the ear of fruit. The inner wall of the bucket 11 is coated with a polytetrafluoroethylene anti-stick coating to prevent seeds from sticking to the surface hairs. The slot 14 is opened through the middle of one side of the V-shaped bucket 11. The width of the slot is adapted to the thickness of common branches of quinoa, and the depth of the slot extends to the middle of the inner wall of the bucket 11 to ensure that the branches are securely inserted. The installation groove 15 is opened on the outer side of the end of the bucket 11 where the slot 14 is located. It is a rectangular groove structure, and the length of the groove is the same as that of the L-shaped pull rod 16. The length of the long arm of rod 16 is matched, and the width of the slot is slightly larger than the thickness of the long arm of L-shaped tie rod 16 to ensure smooth sliding of tie rod 16. L-shaped tie rod 16 is made of stainless steel. The long arm passes through the mounting slot 15 and extends to the outside of bucket 11. The short arm is bent vertically and located on the side of bucket 11 away from the mounting slot 15. Spring 18 is welded and fixed to the inside of the short arm. The other end of spring 18 is welded and fixed to the side of bucket 11. In the initial state, it is in a compressed state. The clamping plate 17 is welded and fixed to the end of L-shaped tie rod 16 near the clamping slot 14. It is a rectangular thin plate structure with a width and length that are exactly the same as the clamping slot 14. Rubber anti-slip pads are pasted on the inside of clamping plate 17 to enhance the friction with branches. Handle 13 is a cylindrical structure and is welded and fixed to the middle of the outside of V-shaped bucket 11. The grip is designed with anti-slip textures and a diameter suitable for an adult's palm. The feed chute 12 is located at the bottom center of the V-shaped bucket 11, forming an inverted trapezoidal structure. The chute opening gradually narrows from the inside to the outside of the bucket 11, facilitating seed collection. The connecting pipe 19 is a rigid, transparent plastic tube, with one end welded and sealed to the bottom of the feed chute 12, and the other end fixedly connected to the feed inlet of the U-shaped channel 21 via a flange joint. The inner wall of the pipe is smooth and burr-free, reducing resistance to seed transport. When harvesting quinoa seeds, the operator holds the harvesting piece 1 by the handle 13, aligns the inner arc of the V-shaped bucket 11 with the mother plant's fruit spike, and brings the fruit spike branches close to the slot 14. Then, the operator pulls the L-shaped lever 16 outwards with one hand. The L-shaped lever 16 moves along the water level in the mounting groove 15. The spring 18 is stretched horizontally and simultaneously from a contracted state to an extended state. The clamping plate 17 moves with the L-shaped pull rod 16, gradually misaligning with the clamping slot 14 until the slot 14 is fully exposed. The fruit spike branch is then inserted into the slot 14, ensuring a tight fit between the branch and the inner wall of the bucket 11. The hand pulling the L-shaped pull rod 16 is released, and the spring 18 contracts under the elastic restoring force. Pulling the L-shaped pull rod 16 back to its original position causes the clamping plate 17 to move and overlap with the clamping slot 14 again, clamping the branch with the rubber anti-slip pad. The handle 13 is gently pulled upwards, and the sharp blade at the front of the V-shaped bucket 11 peels the seeds from the fruit spike. Under gravity, the seeds slide down the anti-stick coating on the inner side of the bucket 11, collecting in the discharge chute 12, and then entering the connecting pipe 19.Finally, the material is transported through connecting pipe 19 to the feed inlet of the U-shaped channel 21, completing a single harvesting operation.

[0022] The above solution utilizes the V-shaped bucket 11's arc structure and sharp blade to increase the contact area with the ears of fruit and quickly separate seeds, thus improving harvesting efficiency. The precise size matching of the slot 14 and the clamping plate 17, combined with the elastic clamping function of the spring 18, allows for the adaptation to branches of different thicknesses. The rubber anti-slip pad prevents branch damage and prevents seed leakage due to branch movement during harvesting. The anti-slip texture and ergonomic design of the handle 13 enhance grip stability, reduce the risk of hand slippage during field operations, and alleviate arm fatigue during prolonged operation. The anti-stick coating on the inner side of the bucket 11, the inverted trapezoidal converging structure of the discharge chute 12, and the seamless connection design of the connecting pipe 19 form a closed loop from seed collection to convergence and transport, reducing seed spillage and ensuring a high seed collection rate. The sliding cooperation between the L-shaped pull rod 16 and the mounting slot 15 enables the rapid opening and closing of the clamping plate 17. The operation is simple and convenient, requiring no complex technical training for immediate use.

[0023] Reference Figures 5 to 8The grading component 2 includes a U-shaped channel 21, a bullhorn-shaped guide block 22, an air pump 23, a discharge block 24, a collection component 25, a triangular shell 251, a collection chamber 252, a collection trough 253, a flow guide block 254, and a discharge pipe 255. The U-shaped channel 21 is made of transparent and wear-resistant acrylic material and is integrally formed from a U-shaped grading tube and a C-shaped discharge pipe. The opening of the C-shaped discharge pipe faces downward and is seamlessly connected to the top of one side of the U-shaped grading tube to ensure smooth airflow and seed flow. The inlet of the channel 21 is opened on the outside of a set of vertical tubes of the U-shaped grading tube. The inlet is connected to the connecting pipe 19 through a flange. The outlet of the channel 21 is opened at one end of the C-shaped discharge pipe. The outlet faces downward and is precisely aligned with the middle gap of the U-shaped grading tube. The bullhorn-shaped guide block 22 is made of... Made of lightweight engineering plastic, it has a hollow structure and is fixed to one end of the discharge port of the C-shaped discharge pipe, leaving a gap between it and the other end of the C-shaped discharge pipe. Multiple sets of connecting holes are evenly distributed on the top arc surface. The straight surface faces downwards and is suspended above the middle gap of the grading pipe. Multiple sets of miniature air pumps 23 are fixed to the straight surface by bolts. The suction end of the air pump 23 passes through the bottom straight surface of the guide block 22, and the discharge end communicates with the hollow interior of the guide block 22. The discharge block 24 is fixed to the bottom of the middle gap of the grading pipe, with a figure-eight structure on the side and a non-stick coating to facilitate the sliding of impurities. Multiple sets of symmetrically staggered collecting elements 25 are fixed along the height direction on the inner side of the vertical pipe of the channel 21 away from the inlet. The triangular shell 251 of the collecting element 25 is welded to the inner side of the channel 21. Two oblique... The outer shell 251 has a concave arc surface in the shape of an "8". The radius of curvature of the arc surface is adapted to the seed particle size. A collection cavity 252 is opened inside the outer shell 251. A collection groove 253 is opened through the upward concave arc surface. The collection groove 253 is completely connected to the collection cavity 252. A guide block 254 is welded to the bottom of the collection cavity 252. The contact surface between the guide block 254 and the seed is inclined. A discharge pipe 255 is welded through the side of the outer shell 251 at the lowest point of the inclined surface. The discharge pipe 255 is a rigid plastic pipe that is seamlessly connected to the collection cavity 252 to facilitate seed discharge. After the impurity removal component 3 completes the coarse screening and the channel 21 is restored to open, the multiple sets of air pumps 23 of the grading component 2 are started. The air pump 23 generates a stable negative pressure at the suction end, which balances the "8" shaped channel 21 through the connecting hole at the top of the horn-shaped guide block 22. The airflow forms a uniform and directional airflow field. Under the combined action of airflow and gravity, the coarsely screened seeds move along the φ-shaped channel 21 towards the vertical pipe away from the feed inlet. The remaining fine impurities are adsorbed onto the arc surface of the guide block 22 under negative pressure, and fall into the discharge block 24 through the gap between the C-shaped discharge pipe and the guide block 22, and slide down the V-shaped side end to be discharged, completing the secondary screening. At the same time, normal seeds enter the area where multiple sets of symmetrically staggered collection pieces 25 are located. The heavier seeds, due to greater inertia and gravity, consume kinetic energy faster and are the first to leave the airflow trajectory, contacting the downward concave arc surface of the lower collection piece 25. Under the guidance of the concave arc surface, they fall precisely onto the upward concave arc surface of another set of collection pieces 25 diagonally below the lower collection piece 25.Seeds fall into the collecting trough 253 under the converging effect of the upward-facing concave arc surface, then enter the collecting chamber 252 through the collecting trough 253. They slide down the inclined surface of the guide block 254 to the lowest point and are finally discharged through the discharge pipe 255. Lighter seeds, with slower kinetic energy dissipation, continue to move upwards to a position where airflow and gravity are balanced, contacting the downward-facing concave arc surface of the upper collecting component 25. Similarly, guided by the guide, collecting trough 253, collecting chamber 252, and guide block 254, they are discharged from the corresponding discharge pipe 255, achieving graded collection of seeds of different weights.

[0024] The above solution utilizes a transparent material design for the U-shaped channel 21, allowing operators to observe seed flow and grading status in real time and adjust the negative pressure parameters of the air pump 23 promptly, thus improving grading accuracy. The integrated structure of the U-shaped grading tube and C-shaped discharge tube, combined with the airflow balancing function of the horn-shaped guide block 22, creates a stable and directional airflow field. This utilizes the kinetic energy differences of seeds of different weights to achieve precise grading, meeting the diverse seed quality requirements of different scenarios such as breeding and ecological restoration. The symmetrical and staggered distribution of the collection components 25 and the concave arc design of the triangular outer shell 251 increase the contact between the seeds and the arc surface. This design minimizes the probability of seed impact and avoids damage to the seed coat. Simultaneously, it guides the seeds to accurately converge into the collection tank 253. With the inclined guidance of the guide block 254 in the collection chamber 252, the seeds are ensured to be smoothly discharged from the discharge pipe 255 without any residue accumulation. Through the negative pressure adsorption structure of the air pump 23 and the horn-shaped guide block 22, secondary screening is completed during grading, simultaneously removing fine and light impurities, improving the purity of the graded seeds, reducing subsequent separate impurity removal processes, and improving overall operating efficiency. The figure-eight-shaped side design of the discharge block 24 accelerates the sliding discharge of impurities from secondary screening, preventing impurities from accumulating and clogging in the channel 21, and ensuring continuous and stable operation of the device.

[0025] Reference Figures 9 to 13The debris removal component 3 includes a lifting groove 31, a debris discharge groove 32, a moving groove 33, an electric push rod 34, a screen plate 35, a T-shaped rotating shaft 36, an outer rod 37, an inner rod 38, a spring 39, a universal coupling 310, a plug rod 311, a mounting rod 312, a plug cylinder 313, a magnetic block, a sliding rod 314, an L-shaped sealing plate 315 and a dividing block 316, a sliding groove 317, and an L-shaped baffle 318. A lifting groove 31 is provided inside the vertical pipe on one side of the feed inlet of the channel 21. The lifting groove 31 has a rectangular groove structure, and its depth is adapted to the lifting stroke of the screen plate 35. A debris discharge groove 32 is provided through the inner side of the lifting groove 31. The debris discharge groove 32 is located near the discharge block 24 and above the discharge block 24 to facilitate the discharge of debris. The bottom of the lifting groove 31 is fixed with bolts. A micro electric telescopic rod 34 is connected to the screen plate 35, which is made of stainless steel and has filter holes evenly distributed on its surface. The screen plate 35 is inclined, with the side closest to the discharge trough 32 being the lowest surface. The sides of the screen plate 35 are tightly abutted against the inner side of the lifting trough 31 or the inner side of the channel 21 to ensure no material leakage. A T-shaped rotating shaft 36 is mounted on the top of the screen plate 35 via a bearing. The rotating shaft 36 passes through the screen plate 35 and extends downwards. An outer rod 37 is welded to the outer surface of the screen plate 37. The outer rod 37 has a U-shaped cross-section and an inner rod 38 is slidably inserted inside. The bottom ends of the inner rod 38 and the outer rod 37 are flush with each other and abut against the top of the screen plate 35. A second spring 39 is welded to the inside of the outer rod 37, with one end of the second spring 39 welded to the inner rod 38. With the connection fixed, in the initial state, spring 39 is in the extended state, pushing the inner rod 38 out of the outer rod 37 to the limit position. The bottom end of the rotating shaft 36 passes through the screen plate 35 and is then welded and fixed with a universal coupling 310. One end of the universal coupling 310 is welded and fixed with an insertion rod 311. A spiral guide strip is wound around the outer surface of the insertion rod 311. An installation rod 312 is welded and fixed inside the channel 21. An insertion cylinder 313 is welded and fixed at the top of the installation rod 312. The insertion cylinder 313 is located directly below the insertion rod 311, and its inner wall has a guide groove that matches the spiral guide strip to ensure that the insertion rod 311 can rotate smoothly after insertion. A magnetic block is embedded on the side end of the screen plate 35, and a magnetic block of the same specification is also embedded at the top of the inside of the waste discharge trough 32. The magnetic properties of the magnetic block on the side end of the screen plate 35 are greater than those of the magnetic block at the top of the waste discharge trough 32. The lifting trough... A sliding groove 317 is provided on the inner side of channel 21, which is connected to the discharge groove 32. An L-shaped baffle 318 is slidably connected inside the sliding groove 317. The long arm of the L-shaped baffle 318 is located in the sliding groove 317, and the short arm extends into the discharge groove 32 and is magnetically attracted to the magnetic block at the top of the discharge groove 32. A moving groove 33 is provided on the inner side of the vertical pipe on the feed inlet side of channel 21. The plane of the moving groove 33 forms a 90-degree angle with the plane of the lifting groove 31. A sliding rod 314 is slidably connected inside the moving rod 314. An L-shaped blocking plate 315 is welded and fixed to the side end of the sliding rod 314. The top surface of the L-shaped blocking plate 315 is an inclined surface, with the inclined direction away from the lifting groove 31. A dividing block 316 is welded and fixed to the inner side of the vertical pipe on the feed inlet side of channel 21 away from the lifting groove 31. The top surface of the dividing block 316 is an inclined surface.The inclined direction faces the lifting groove 31. In the initial state, the top of the sealing plate 315 is higher than the top of the dividing block 316. When the seeds collected by the collecting component 1 are transported to the feed inlet of the U-shaped channel 21 through the connecting pipe 19 and fall to the top of the screen plate 35 of the impurity removal component 3, the impurity removal component 3 is in the initial state. The L-shaped baffle 318 is magnetically attracted and blocks the impurity discharge groove 32. The top of the L-shaped sealing plate 315 is higher than the dividing block 316, the channel 21 remains open, the screen plate 35 is at the top of the lifting groove 31, and the insertion rod 311 is not inserted. Inserting the sleeve 313 activates the electric actuator 34, whose movable rod slowly extends and retracts downwards, causing the sieve plate 35 to move vertically downwards along the lifting groove 31. The magnetic block on the side of the sieve plate 35 moves downwards accordingly, and upon contacting the L-shaped baffle 318, its stronger magnetism attracts the L-shaped baffle 318, causing it to move synchronously downwards along the sliding groove 317, gradually exposing the impurity discharge groove 32. Simultaneously, the magnetic block on the side of the sieve plate 35, through magnetic force transmission, causes the sliding rod 314 to move downwards along the moving groove 33, thereby pulling the L-shaped sealing plate 315 downwards synchronously until the L-shaped sealing plate 315... The side end tightly abuts against one end of the blocking block 316, forming a partition inside the channel 21. The screen plate 35 continues to move downward, and the bottom insertion rod 311 is precisely inserted into the insertion cylinder 313 at the top of the mounting rod 312. The spiral guide strip meshes with the guide groove, converting the vertical force into rotational force, driving the insertion rod 311 to rotate. This force is transmitted to the T-shaped rotating shaft 36 through the universal coupling 310, causing the outer rod 37 to rotate synchronously. The second spring 39 is always extended, pushing the inner rod 38 out. The two are in contact with the screen plate 35, pushing the mixture to spread evenly. Seeds smaller than the filter holes pass through the sieve holes and fall into the lower channel 21. Coarse impurities move towards the discharge trough 32 under the action of rotation and the tilting of the sieve plate 35, pass through the discharge trough 32 and fall to the discharge block 24, then slide down the V-shaped side end and are discharged. After coarse screening is completed, the electric push rod 34 is activated in reverse, driving the sieve plate 35 to reset upwards. The L-shaped baffle 318 resets and seals the discharge trough 32 under the attraction of the magnetic block at the top of the discharge trough 32. The L-shaped sealing plate 315 moves upwards with the sieve plate 35 and separates from the blocking block 316, and the channel 21 is reopened.

[0026] The above solution utilizes an integrated design where the electric actuator 34 drives the screen plate 35 to lift and rotate. Combined with the elastic fit of the outer rod 37 and inner rod 38, dynamic screening of the harvested material is achieved. Compared to a static screen, this significantly improves the separation efficiency of coarse impurities and seeds, and can adapt to materials with different stacking thicknesses, avoiding incomplete screening due to localized accumulation. Magnetic adsorption enables synchronous linkage between the L-shaped baffle 318, the L-shaped blocking plate 315, and the screen plate 35, eliminating the need for additional power control. This ensures that the discharge trough 32 opens as needed to discharge impurities, and the blocking plate 315 and the dividing block 316 work together to isolate the channel 21, preventing untreated seeds from entering the grading process and significantly improving grading purity. The spiral guide structure of the insert rod 311 and insert cylinder 313 cleverly converts linear motion into rotational power, driving the outer rod 37 and inner rod 38 to evenly push the material, ensuring that the filter holes of the screen plate 35 are not blocked. At the same time, the telescopic adaptability of the spring 39 allows the inner rod 38 to always be in contact with the screen plate 35, cleaning residual impurities and ensuring thorough impurity removal. Through the inclined design of the screen plate 35 and the through-connection of the impurity discharge groove 32 and discharge block 24, gravity guides coarse impurities to be discharged quickly, avoiding the accumulation of impurities in the device and ensuring continuous and stable operation of the device. The stainless steel screen plate 35 and anti-clogging design improve the wear resistance and corrosion resistance of the device, making it suitable for complex field working environments and extending its service life.

[0027] The working principle of this invention is as follows: The operator holds the handle 13 of the harvesting component 1, places the V-shaped bucket 11 close to the fruit spike of the quinoa mother plant, and manually pulls the L-shaped lever 16 outward. The L-shaped lever 16 slides along the mounting groove 15 and stretches the spring 18, causing the clamping plate 17 to completely misalign with the clamping groove 14, fully exposing the clamping groove 14. The fruit spike branch of the mother plant is aligned with the clamping groove 14 and inserted, ensuring that the branch is in close contact with the inner wall of the V-shaped bucket 11. Then, the L-shaped lever 16 is slowly released, and the spring 18 contracts under the action of elastic restoring force, pulling the L-shaped lever 16 back to its original position, so that the clamping plate 17 and the clamping groove 14 are realigned and clamp the branch, preventing the branch from shaking during harvesting. The handle 13 is gently pulled upward, and the cutting edge of the V-shaped bucket 11 peels the seeds off the fruit spike. Under the influence of gravity, the seeds fall into the bucket 11, completing the harvesting operation. The harvested seeds slide down the inclined inner wall of the V-shaped bucket 11 to the bottom chute 12, and then enter the connecting pipe 19 through the chute 12. The connecting pipe 19 is sealed and connected to the feed inlet of the U-shaped channel 21. With the assistance of gravity and airflow, the seeds are continuously transported to the vertical pipe on one side of the feed inlet of the U-shaped channel 21 of the grading component 2, and fall to the top of the screen plate 35 of the impurity removal component 3. At this time, the impurity removal component 3 is in the initial state. The L-shaped baffle 318 is magnetically attracted and blocked the discharge chute 32. The top of the L-shaped blocking plate 315 is higher than the dividing block 316, the channel 21 remains open, the screen plate 35 is at the top of the lifting groove 31, and the insertion rod 311 is not inserted into the insertion cylinder 313. Then, the electric push rod 34 of the impurity removal component 3 is activated. The movable rod of the electric actuator 34 slowly extends and retracts downward, causing the sieve plate 35 to move vertically downward along the lifting groove 31. The magnetic block embedded on the side of the sieve plate 35 moves downward accordingly. When it comes into contact with the L-shaped baffle 318, the magnetic force is stronger, attracting the L-shaped baffle 318 and causing the L-shaped baffle 318 to move downward synchronously along the sliding groove 317, gradually exposing the impurity discharge groove 32. At the same time, the magnetic block on the side of the sieve plate 35 drives the sliding rod 314 to move downward along the moving groove 33 through magnetic force conduction, thereby pulling the L-shaped blocking plate 315 downward synchronously until the side of the L-shaped blocking plate 315 is tightly abutted against one end of the blocking block 316, forming a partition inside the U-shaped channel 21 to prevent unremoved seeds from entering the grading area. As the sieve plate 35 continues to move downward, the insertion rod 311 at its bottom end is precisely inserted into the mounting rod 31. Inside the top of the insert 313, the spiral guide strip on the outer surface of the insert rod 311 engages with the guide groove on the inner wall of the insert 313. The vertical force of the downward movement of the sieve plate 35 is converted into rotational force, driving the insert rod 311 to rotate. This force is transmitted to the T-shaped rotating shaft 36 through the universal coupling 310, causing the T-shaped rotating shaft 36 to drive the outer rod 37 to rotate synchronously. The spring 39 inside the outer rod 37 is always in an extended state, pushing out the inner rod 38 so that the bottom end of the inner rod 38 is tightly attached to the top of the sieve plate 35. During rotation, the outer rod 37 and the inner rod 38 together push the mixture at the top of the sieve plate 35 to spread evenly, achieving dynamic sieving. Seeds with a particle size smaller than the filter holes of the sieve plate 35 pass through the sieve holes and fall into the lower channel 21, while coarse impurities such as ear stalks, large pieces of residual leaves, etc., cannot pass through the sieve holes.Driven by the rotating push rod and guided by the tilt angle of the screen plate 35, it moves towards the discharge trough 32, eventually passing through the discharge trough 32 and falling to the discharge block 24. It then slides down the V-shaped side of the discharge block 24 to the outside of the device, completing the coarse screening. After the coarse screening is completed, the electric push rod 34 is activated in reverse, driving the screen plate 35 to reset upwards. The L-shaped baffle 318 is reset under the adsorption of the magnetic block at the top of the discharge trough 32, resealing the discharge trough 32. The L-shaped sealing plate 315 moves upwards with the screen plate 35 and separates from the blocking block 316, restoring the passage 21 to open. The multiple sets of air pumps 23 of the grading component 2 are activated. The air pump 23 generates a stable negative pressure at its suction end, which balances the airflow in the V-shaped passage 21 through the connecting hole at the top of the bullhorn-shaped guide block 22, forming a uniform airflow field in the passage 21, and removing residual airflow. Fine impurities, such as shriveled seeds and debris, are adsorbed onto the arc surface of the guide block 22 under negative pressure and discharged with the airflow, achieving secondary screening. Simultaneously, normal seeds, under the combined action of airflow and gravity, move along the U-shaped channel 21 towards the vertical pipe away from the feed inlet, entering the area of ​​multiple symmetrically staggered collection elements 25. Heavier seeds, due to greater inertia and gravity, consume kinetic energy more quickly and are the first to detach from the airflow trajectory during their movement. They then contact the downward-facing concave arc surface of the lower collection element 25. Guided by this concave arc surface, they precisely fall onto the upward-facing concave arc surface of another set of collection elements 25 diagonally below this collection element 25. The seeds, under the converging effect of the upward-facing concave arc surface, fall into the collection trough 253 and enter the collection chamber 252. The guide block 254 at the bottom of the collecting chamber 252 is designed with an incline. Seeds slide down the inclined surface of the guide block 254 to the lowest point and are finally discharged through the discharge pipe 255, completing the collection of heavy seeds. Seeds with slightly lighter weight consume kinetic energy more slowly and can continue to move upwards until the airflow and gravity reach equilibrium and can no longer move upwards. They then contact the downward concave arc surface of the upper collecting component 25 and are similarly guided by the guide, collecting groove 253, collecting chamber 252, and guide block 254, and discharged from the discharge pipe 255 at the corresponding position, realizing the graded collection of seeds of different weights. Through the design of the arc-shaped inner wall of the V-shaped bucket 11 fitting the ear of fruit, combined with the elastic clamping structure of the slot 14 and the clamping plate 17, the branches of the mother plant are accurately fixed, avoiding seed loss caused by branch displacement during harvesting. With the automatic reset function of spring 18, there is no need to manually adjust the clamping force, simplifying the harvesting process and improving the harvesting efficiency per plant. The seamless connection between the discharge chute 12 and the connecting pipe 19 allows the harvested seeds to be directly and directionally transported to the U-shaped channel 21, reducing drop losses. Meanwhile, the ergonomic design of the handle 13 reduces the labor intensity of bending and lifting, making it suitable for long-term field harvesting scenarios. The directional airflow field formed by the U-shaped channel 21, combined with the symmetrical and staggered distribution of the collection components 25, utilizes the kinetic energy differences of seeds of different weights to achieve precise grading, meeting the differentiated seed quality requirements of different scenarios such as breeding and ecological restoration. The triangular outer shell 251 of the collection component 25 adopts a concave arc surface design, which avoids seed impact damage to the seed coat.It can guide seeds to accurately converge into the collection tank 253, and with the inclined guidance of the guide block 254 in the collection chamber 252, ensure that the seeds are smoothly discharged from the discharge pipe 255 without residue accumulation. The horn-shaped guide block 22 and the negative pressure adsorption structure of the air pump 23 can simultaneously remove fine light impurities in the secondary screening, improve the purity of the graded seeds, and reduce subsequent processing steps. The integrated design of lifting and rotating the screen plate 35 driven by the electric push rod 34, combined with the elastic fitting structure of the outer rod 37 and the inner rod 38, realizes dynamic screening of the harvested materials. Compared with static screens, it significantly improves the separation efficiency of coarse impurities and seeds, and can adapt to different accumulation levels. For thick materials, magnetic adsorption enables the coordinated control of the L-shaped baffle 318, L-shaped blocking plate 315, and sieve plate 35. This ensures that the discharge trough 32 opens as needed to discharge coarse impurities, while the L-shaped blocking plate 315 and the dividing block 316 prevent untreated seeds from entering the grading process, thus improving grading purity. The spiral guiding structure of the insert rod 311 and insert cylinder 313 converts linear motion into rotational power, driving the outer rod 37 and inner rod 38 to evenly push the material, ensuring that the filter holes of the sieve plate 35 are not clogged. Simultaneously, the adaptability of the spring 39 allows it to conform to the sieve plate 35 to clean residual impurities, ensuring thorough impurity removal.

[0028] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A hand-held device for seed harvesting of Ceratoides arborescens, comprising: The application discloses a seed collecting device (1) for collecting seeds from a mother plant, characterized in that the seed collecting device (1) is provided with a grading device (2) at one end for grading the collected seeds by weight, and the grading device (2) is provided with a foreign matter removing device (3) for pre-treating the seeds before grading. The grading device (2) comprises a Qizhong-shaped channel (21), a horn-shaped guide block (22) is fixed at one end of the inner side of the discharge port of the channel (21) and has a gap with the other end of the inner side of the discharge port of the channel (21), the guide block (22) is hollow, a plurality of groups of communicating holes are formed in the arc top surface of the guide block (22), the straight surface of the guide block (22) faces downward and is located above the middle gap of the grading pipe, a plurality of groups of air pumps (23) are fixed on the straight surface, the air pump (23) penetrates through the bottom straight surface of the guide block (22), a discharge block (24) is fixed at the bottom end of the middle gap of the grading pipe, the side end of the discharge block (24) is in an eight-shaped form, and a plurality of groups of collecting devices (25) are fixed in the vertical pipe on the side of the channel (21) away from the feeding port in a symmetrical and staggered manner. The collecting device (25) comprises a triangular-shaped shell (251) fixed on the inner side of the channel (21), the two inclined surfaces of the shell (251) are concave arc surfaces and are in an eight-shaped form, a collecting cavity (252) is formed in the shell (251), the upward concave arc surface penetrates through a collecting groove (253) and is communicated with the collecting cavity (252). When the seed collecting device (1) collects seeds, the seeds fall into the Qizhong-shaped channel (21) under the action of gravity, the foreign matter removing device (3) removes the foreign matters in the seeds, the normal seeds with different weights enter the area of the collecting device (25) along the vertical pipe upward, the kinetic energy of the seeds with a larger weight is consumed quickly, the seeds are guided downward by the downward arc surface of the lower collecting device (25), fall to the upward arc surface of the other group of collecting devices (25) and enter the collecting cavity (252) through the collecting groove (253), when the seeds with a slightly smaller weight move upward to a position where the seeds cannot continue to move upward, the seeds are guided and collected by the corresponding collecting device (25), and the seeds are collected and graded.

2. A hand-operated gromwell seed harvesting device according to claim 1, characterised in that The bottom end of the collecting cavity (252) is fixed with a flow guide block (254), the upward contact surface of the flow guide block (254) is an inclined surface, the side end of the shell (251) on the side of the lowest point of the inclined surface penetrates through a discharge pipe (255) and is communicated with the collecting cavity (252).

3. A hand-held device for harvesting seeds of Puccinellia simplex according to claim 2, characterised in that The collecting piece (1) includes a V-shaped shovel (11), one side of the shovel (11) is provided with a clamping groove (14), the outer side of the one end of the shovel (11) provided with the clamping groove (14) is provided with a mounting groove (15), an L-shaped pull rod (16) is slidably connected in the mounting groove (15), the long arm of the L-shaped pull rod (16) penetrates through the mounting groove (15), the short arm of the L-shaped pull rod (16) is located on one side of the shovel (11), a spring (18) is fixedly connected to the inner side of the short arm of the L-shaped pull rod (16), one end of the spring (18) is fixedly connected to one side of the shovel (11), one end of the pull rod (16) is fixedly connected with a clamping plate (17), the width and length of the clamping plate (17) are consistent with the clamping groove (14), in the initial state, the spring (18) is in the contraction state, the clamping plate (17) overlaps with the clamping groove (14), when in use, the pull rod (16) is manually pulled, the spring (18) is stretched, so that the clamping plate (17) is dislocated with the clamping groove (14), the clamping groove (14) is exposed, and the female plant is clamped into the clamping groove (14), then the pull rod (16) is released, the spring (18) is contracted, and the clamping plate (17) and the clamping groove (14) clamp the female plant.

4. A hand-operated gromwell seed harvesting device according to claim 3, characterised in that The outer side of the shovel (11) is fixedly connected with a handle (13), the bottom end of the shovel (11) is provided with a discharging groove (12), the bottom end of the shovel (11) is fixedly connected with a communication pipe (19), one end of the communication pipe (19) communicates with the discharging groove (12), and the other end of the communication pipe (19) communicates with the inlet of the channel (21).

5. A hand-held device for harvesting seeds of Puccinellia simplex according to claim 4, characterised in that The impurity removing piece (3) includes a lifting groove (31) provided in the inner side of the vertical pipe on one side of the inlet of the channel (21), a discharging groove (32) is provided in the inner side of the lifting groove (31), the discharging groove (32) is located on one side close to the discharging block (24) and is arranged above the discharging block (24), a electric push rod (34) is fixedly connected to the inner bottom of the lifting groove (31), the movable rod of the electric push rod (34) is fixedly connected with a sieve plate (35), the sieve plate (35) is in an inclined state, the side close to the discharging groove (32) is the lowest surface, and the side ends of the sieve plate (35) abut against the inner side of the lifting groove (31) or the inner side of the channel (21) respectively.

6. A hand-held device for harvesting seeds of Puccinellia simplex according to claim 5, characterised in that The top end of the sieve plate (35) is rotatably provided with a T-shaped rotating shaft (36), the rotating shaft (36) penetrates through the sieve plate (35), the outer circular surface of the rotating shaft (36) is fixedly connected with an outer rod (37), the cross section of the outer rod (37) is in the shape of a Chinese character, an inner rod (38) is slidably connected in the outer rod (37), the bottom ends of the inner rod (38) and the outer rod (37) are flush and abut against the top end of the sieve plate (35), a spring (39) is fixedly connected in the inner rod (38), one end of the spring (39) is fixedly connected with the inner rod (38), and the spring (39) is in the initial state, the inner rod (38) is pushed out of the outer rod (37) to the limit position.

7. A hand-held device for harvesting seeds of Ceratoides pilosa according to claim 6, characterized in that The rotating shaft (36) penetrates the sieve plate (35) and is fixedly connected with a universal joint (310), one end of the universal joint (310) is fixedly connected with a plug rod (311), the outer circular surface of the plug rod (311) is wound with a spiral guide strip, the inside of the channel (21) is fixedly connected with a mounting rod (312), the top end of the mounting rod (312) is fixedly connected with a plug cylinder (313), the plug cylinder (313) is arranged directly below the plug rod (311), and the inner wall of the plug cylinder (313) is provided with a guide groove matched with the spiral guide strip.

8. A hand-held device for harvesting seeds of Puccinellia simplex according to claim 7, characterised in that The sieve plate (35) is embedded with a magnetic block at the side end, the inside top end of the impurity removal groove (32) is also embedded with a magnetic block, the magnetic block at the side end of the sieve plate (35) has a greater magnetic property than the magnetic block at the inside top end of the impurity removal groove (32), the inside of the lifting groove (31) is provided with a sliding groove (317) in communication with the impurity removal groove (32), the sliding groove (317) is slidably connected with an L-shaped baffle (318), the long arm part of the L-shaped baffle (318) is arranged in the sliding groove (317), the short arm part of the L-shaped baffle (318) is arranged in the impurity removal groove (32) and is magnetically adsorbed with the magnetic block embedded at the inside top end of the impurity removal groove (32), in the initial state, the L-shaped baffle (318) is magnetically adsorbed with the inside top end of the impurity removal groove (32) through the magnetic block, so that the baffle (318) shields the impurity removal groove (32), when the electric push rod (34) drives the sieve plate (35) to move downwards, the plug rod (311) and the plug cylinder (313) are matched, the inner rod (38) and the outer rod (37) push the picked objects accumulated on the sieve plate (35), and then during the screening process, the magnetic block embedded at the side end of the sieve plate (35) contacts the baffle (318) and is magnetically adsorbed, so that the baffle (318) moves downwards synchronously with the sieve plate (35), and the impurity removal groove (32) is exposed, when the sieve plate (35) moves to the side end of the impurity removal groove (32), under the rotation of the inner rod (38) and the outer rod (37) and the inclination of the sieve plate (35), the impurities on the sieve plate (35) that cannot pass through the filter holes of the sieve plate (35) pass through the impurity removal groove (32) and are discharged through the discharge block (24).

9. A hand-held device for harvesting seeds of Puccinellia simplex according to claim 8, characterised in that The vertical pipe on the feeding port side of the channel (21) is provided with a moving groove (33) on the inner side, the plane where the moving groove (33) is located and the plane where the lifting groove (31) is located are at an angle of 90 degrees, a sliding rod (314) is slidably connected in the moving groove (33), an L-shaped blocking plate (315) is fixedly connected to the side end of the sliding rod (314), the top end surface of the L-shaped blocking plate (315) is an inclined surface, the inclined direction is away from the side of the lifting groove (31), a blocking piece (316) is fixedly connected to the side away from the lifting groove (31) in the vertical pipe on the feeding port side of the channel (21), the top end surface of the blocking piece (316) is an inclined surface, the inclined direction is towards the side of the lifting groove (31), in the initial state, the top end of the blocking plate (315) is higher than the top end of the blocking piece (316), along with the downward movement of the sieve plate (35), the blocking plate (315) is driven to move downward synchronously under the magnetic action of the magnetic block embedded in the side end of the sieve plate (35), until the end of the blocking piece (316) abuts against the blocking plate (315), thereby forming a partition in the channel (21).

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