A seed screening device
By using a spiral screening device and an automatic feeding mechanism, the problem of separating rapeseed seeds from milkvetch seeds has been solved, achieving efficient and low-cost seed purity assurance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGXI ZHUANG AUTONOMOUS REGION ACAD OF AGRI SCI
- Filing Date
- 2025-06-18
- Publication Date
- 2026-06-23
AI Technical Summary
During mechanized harvesting, milkvetch seeds are easily mixed with rapeseed seeds. Existing seed purity air separators are highly dependent on operation and have poor separation effect in humid environments, affecting seed purity.
Design a spiral screening device that uses a spiral screening cylinder and a feeding hopper to separate milkvetch and rapeseed seeds through spiral screening plates and centrifugal force, and achieves efficient separation by combining an automatic feeding mechanism.
This method achieves efficient removal of rapeseed seeds from milkvetch seeds, ensuring seed purity, reducing labor intensity, improving processing efficiency, and lowering costs.
Smart Images
Figure CN224389291U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of agricultural technology, and in particular to a seed screening device. Background Technology
[0002] Milk clover (Astragalus sinicus) is a biennial herb belonging to the genus Astragalus in the legume family. It is the most important green manure crop planted and utilized in rice-growing areas of southern China, and it plays a role in improving soil quality and fertility. During its peak flowering period, it produces a large amount of nectar and the honey is of good quality, making it an important honey source plant.
[0003] During the mechanized harvesting of milkvetch seeds, rapeseed seeds may be mixed in, affecting the purity of the seeds. Currently, seed purity air separators can be used to separate shriveled seeds and impurities through airflow. However, these air separators require manual adjustment of wind speed / volume to match different samples, making them highly dependent on experience. Improper operation can easily lead to inaccurate results. In humid environments, seeds adhere to each other, making effective airflow separation difficult, necessitating pre-drying treatment. Utility Model Content
[0004] To address the aforementioned problems, this invention provides a seed sieving device that can effectively remove rapeseed seeds from milkvetch seeds, ensuring seed purity.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A seed screening device includes a spiral screening cylinder and a feed funnel. The spiral screening cylinder includes a fixed rod and a spiral channel. The fixed rod is fixedly inserted into the spiral channel. The spiral channel has an open structure on the side near the fixed rod. The side of the spiral channel near the fixed rod is a first screening path, and the other side is a second screening path. A plurality of spiral screening plates are arranged in the first screening path. The spiral screening plates are evenly spaced along the axial direction of the fixed rod. One side of the spiral screening plate is fixedly connected to the fixed rod, and the spiral screening plate is inclined so that the side of the spiral screening plate near the fixed rod is the lower side.
[0007] The bottom of the spiral channel is provided with a first discharge channel and a second discharge channel. The first discharge channel is electrically connected to the first screening path, and the second discharge channel is electrically connected to the second screening path.
[0008] The feeding funnel is located at the top of the spiral screening cylinder. The narrow end of the feeding funnel is fixedly connected to the fixed rod, and a feed inlet is provided through the side of the feeding funnel near its narrow end so that the seeds can enter the first screening path through the feed inlet.
[0009] Furthermore, the length of the spiral screen plate near the end of the feed hopper increases sequentially in the descending direction.
[0010] Furthermore, a baffle plate is fixedly provided at one end of the spiral screening plate near the feed hopper, one side of the baffle plate is fixedly connected to the fixing rod, and the bottom of the baffle plate is fixedly connected to the longest spiral screening plate.
[0011] Furthermore, it also includes a frame, which is sleeved outside the spiral screening cylinder and is fixedly connected to both the spiral screening cylinder and the feed hopper.
[0012] Furthermore, a feeding mechanism is provided on one side of the frame. The feeding mechanism includes a fixed frame and a feeding hopper. One side of the fixed frame is fixedly connected to the frame. The two sides of one end of the feeding hopper are slidably connected to the fixed frame. The feeding hopper is connected to the fixed frame through a lifting mechanism so that the feeding hopper can move above the feeding funnel.
[0013] A feeding port is provided above the feeding hopper, and a discharge port is provided through the side of the feeding hopper near the fixed frame. A baffle is provided at the discharge port, and one end of the baffle is rotatably connected to the bottom of the feeding hopper. A limit plate is provided on the fixed frame, and the limit plate abuts against the baffle to close the discharge port. When the feeding hopper moves above the feeding funnel, the baffle moves away from the limit plate and rotates to open, so that the seeds in the feeding hopper are discharged into the feeding funnel through the discharge port.
[0014] Furthermore, the lifting mechanism includes a dual-shaft winch (5), and the two winding ends of the dual-shaft winch (5) are respectively provided with traction ropes, and the end of the traction rope away from the dual-shaft winch is connected to the feeding hopper.
[0015] Furthermore, the top of the limiting plate has a rounded corner structure.
[0016] The beneficial effects of this utility model are:
[0017] 1. After the seeds are fed into the feeding hopper, they enter the first screening path through the feed inlet and slide down the spiral screen plate. Since the weight of milkvetch seeds is less than that of rapeseed seeds, during the process of the seeds sliding down, the rapeseed seeds fall to the second screening path under the action of centrifugal force and are discharged through the second discharge channel. However, milkvetch seeds are lighter and can slide down the spiral screen plate and be discharged through the first discharge channel. This removes rapeseed seeds mixed in with milkvetch seeds, ensures the purity of the seeds, and improves the planting quality of milkvetch seeds. This utility model has a simple structure and low price, and can improve the processing efficiency of milkvetch seeds.
[0018] 2. Since the spiral screening cylinder uses gravity for screening, it is relatively high. In this invention, the seeds to be processed are fed into the feeding hopper through the feeding port. Under the action of the lifting mechanism, the feeding hopper rises. When the feeding hopper rises above the feeding funnel, the baffle leaves the limiting plate. Under the action of the weight of the seeds, the baffle is opened and rotated, so that the seeds in the feeding hopper are discharged into the feeding funnel through the discharge port. There is no need for manual feeding, which reduces labor intensity and avoids the injury caused by manual feeding. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of a seed screening device according to a preferred embodiment of the present invention.
[0020] Figure 2 This is a schematic diagram of the feed funnel structure of a seed screening device according to a preferred embodiment of the present invention.
[0021] Figure 3 This is a schematic diagram of the feed inlet structure of a seed screening device according to a preferred embodiment of the present invention.
[0022] Figure 4 This is a schematic diagram of the spiral sieve plate structure of a seed sieving device according to a preferred embodiment of the present invention.
[0023] Figure 5 This is a schematic diagram of the bottom structure of the spiral screening cylinder of a seed screening device according to a preferred embodiment of the present invention.
[0024] Figure 6 This is a schematic diagram of the feeding mechanism of a seed screening device according to a preferred embodiment of the present invention.
[0025] Figure 7 This is a schematic diagram of the feeding hopper structure of a seed screening device according to a preferred embodiment of the present invention.
[0026] In the diagram, 1-spiral screening cylinder, 101-first screening path, 102-second screening path, 11-fixed rod, 12-spiral channel, 121-first discharge channel, 122-second discharge channel, 13-spiral screening plate, 131-baffle plate, 2-feeding funnel, 201-feeding port, 3-frame, 4-fixed frame, 41-feeding hopper, 411-feeding port, 412-discharge port, 413-baffle plate, 42-limiting plate, 421-connecting plate, 43-sliding component, 5-dual shaft winch, 51-traction rope. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.
[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0030] Please also see Figures 1 to 7 The seed screening device of this utility model, according to a preferred embodiment, includes a spiral screening cylinder 1, a feeding funnel 2, and a frame 3.
[0031] like Figure 1 , Figure 2 and Figure 3 As shown, the fixing rod 11 is fixedly inserted into the spiral channel 12. The spiral channel 12 has an open structure on the side near the fixing rod 11. The side of the spiral channel 12 near the fixing rod 11 is the first screening path 101, and the other side is the second screening path 102. A number of spiral screening plates 13 are arranged in the first screening path 101. The spiral screening plates 13 are evenly spaced along the axial direction of the fixing rod 11. One side of the spiral screening plate 13 is fixedly connected to the fixing rod 11, and the spiral screening plate 13 is inclined so that the side of the spiral screening plate 13 near the fixing rod 11 is the lower side.
[0032] The bottom of the spiral channel 12 is provided with a first discharge channel 121 and a second discharge channel 122. The first discharge channel 121 is connected to the first screening path 101, and the second discharge channel 122 is connected to the second screening path 102.
[0033] The feed hopper 2 is set at the top of the spiral screening cylinder 1. The narrow end of the feed hopper 2 is fixedly connected to the fixing rod 11, and the feed inlet 201 is provided through the side of the feed hopper 2 near its narrow end so that the seeds can enter the first screening path 101 through the feed inlet 201.
[0034] like Figure 2 As shown, the length of the spiral screening plates 13 near the feed hopper 2 increases sequentially in the descending direction. This allows the seeds discharged from the feed inlet 201 to slide evenly onto each spiral screening plate 13, avoiding blockage of the first screening path 101 and improving seed screening efficiency.
[0035] like Figure 3 As shown, a baffle plate 131 is fixedly installed at one end of the spiral sieve plate 13 near the feed hopper 2. One side of the baffle plate 131 is fixedly connected to the fixing rod 11, and the bottom of the baffle plate 131 is fixedly connected to the longest spiral sieve plate 13. Under the action of the baffle plate 131, seeds are prevented from falling into the second sieve path 102, thus avoiding accidental falling of milkvetch seeds into the second sieve path 102.
[0036] The frame 3 is fitted outside the spiral screen cylinder 1, and the frame 3 is fixedly connected to the spiral screen cylinder 1 and the feed hopper 2 respectively.
[0037] In this embodiment, after the seeds are put into the feed hopper 2, they enter the first screening path 101 through the feed inlet 201 and slide down the spiral screen plate 13. Since the weight of milkvetch seeds is less than that of rapeseed seeds, during the process of the seeds sliding down, the rapeseed seeds fall to the second screening path 102 under the action of centrifugal force and are discharged through the second discharge channel 122. However, milkvetch seeds are lighter and can slide down the spiral screen plate 13 and be discharged through the first discharge channel 121. This removes the rapeseed seeds mixed in with the milkvetch seeds, ensures the purity of the seeds, and improves the planting quality of milkvetch seeds. This embodiment has a simple structure and low price, and can improve the processing efficiency of milkvetch seeds.
[0038] like Figure 1 , Figure 6 and Figure 7 As shown, a feeding mechanism is provided on one side of the frame 3. The feeding mechanism includes a fixed frame 4 and a feeding hopper 41.
[0039] In this embodiment, the fixing frame 4 is a rectangular frame structure. One side of the fixing frame 4 is fixedly connected to the frame body 3. The two sides of one end of the feeding hopper 41 are slidably connected to the fixing frame 4, and the feeding hopper 41 is connected to the fixing frame 4 through a lifting mechanism so that the feeding hopper 41 can move above the feeding funnel 2. In this embodiment, sliding members 43 are fixedly provided on both sides of one end of the feeding hopper 41, and sliding grooves are recessed on both sides inside the fixing frame 4. The sliding members 43 are embedded in the sliding grooves and slidably connected to the fixing frame 4 to realize the slidable connection between the feeding hopper 41 and the fixing frame 4.
[0040] like Figure 7 As shown, a feeding port 411 is provided above the feeding hopper 41, and a discharge port 412 is provided through the side of the feeding hopper 41 near the fixed frame 4. A baffle 413 is provided at the discharge port 412. One end of the baffle 413 is rotatably connected to the bottom of the feeding hopper 41 by a hinge. The fixed frame 4 is provided with a limiting plate 42, which abuts against the baffle 413 so that the baffle 413 closes the discharge port 412. When the feeding hopper 41 moves above the feeding funnel 2, the baffle 413 leaves the limiting plate 42 and rotates open so that the seeds in the feeding hopper 41 are discharged into the feeding funnel 2 through the discharge port 412.
[0041] In this embodiment, the limiting plate 42 is connected to the fixing frame 4 on both sides by connecting plates 421. In order to reduce the friction between the baffle 413 and the limiting plate 42, the limiting plate 42 can be provided with rollers so that the limiting plate 42 abuts against the baffle 413 through the rollers.
[0042] Preferably, the top of the limiting plate 42 has a rounded corner structure. The rounded corner structure of the limiting plate 42 facilitates the movement of the baffle 413 on the top of the limiting plate 42.
[0043] Since the spiral screening cylinder 1 uses gravity for screening, it is relatively high. In this embodiment, the seeds to be processed are fed into the feeding hopper 41 through the feeding port 411. Under the action of the lifting mechanism, the feeding hopper 41 rises. When the feeding hopper 41 rises above the feeding funnel 2, the baffle 413 leaves the limiting plate 42. Under the action of the gravity of the seeds, the baffle 413 is opened and rotated, so that the seeds in the feeding hopper 41 are discharged into the feeding funnel 2 through the discharge port 412. There is no need for manual feeding, which reduces labor intensity and avoids falls caused by manual feeding.
[0044] like Figure 6 As shown, the lifting mechanism includes a dual-shaft winch 5, with traction ropes 51 respectively provided at the two winding ends of the dual-shaft winch 5. The end of the traction rope 51 away from the dual-shaft winch 5 is connected to the loading hopper 41. In this embodiment, the dual-shaft winch 5 is fixedly connected to the top of the fixed frame 4. The traction rope 51 is fixedly connected to the sliding member 43 on the corresponding side.
[0045] The seed sieving device in this embodiment performs the following sieving process:
[0046] The seeds to be processed are fed into the feeding hopper 41 through the feeding port 411. The double-shaft winch 5 winds up the hopper 41, and the feeding hopper 41 rises. When the feeding hopper 41 rises above the feeding funnel 2, the baffle 413 leaves the limiting plate 42. Under the action of the gravity of the seeds, the baffle 413 is opened and rotated, so that the seeds in the feeding hopper 41 are discharged into the feeding funnel 2 through the discharge port 412.
[0047] After the seeds enter the feed hopper 2, they enter the first screening path 101 through the feed inlet 201. At the same time, the seeds fall evenly onto each spiral screening plate 13 and spiral down along the spiral screening plate 13. During the process of the seeds sliding down, under the action of centrifugal force, the rapeseed seeds fall to the second screening path 102 and are discharged through the second discharge channel 122. The milkvetch seeds are lighter and can slide down along the spiral screening plate 13 and be discharged through the first discharge channel 121, thereby removing the rapeseed seeds mixed in with the milkvetch seeds.
Claims
1. A seed screening device, characterized in that, The device includes a spiral screening cylinder (1) and a feed funnel (2). The spiral screening cylinder (1) includes a fixed rod (11) and a spiral channel (12). The fixed rod (11) is fixedly inserted into the spiral channel (12). The spiral channel (12) has an open structure on the side near the fixed rod (11). The side of the spiral channel (12) near the fixed rod (11) is a first screening path (101), and the other side is a second screening path (102). A plurality of spiral screening plates (13) are arranged in the first screening path (101). The spiral screening plates (13) are evenly spaced along the axial direction of the fixed rod (11). One side of the spiral screening plate (13) is fixedly connected to the fixed rod (11), and the spiral screening plate (13) is inclined so that the side of the spiral screening plate (13) near the fixed rod (11) is the lower side. The bottom of the spiral channel (12) is provided with a first discharge channel (121) and a second discharge channel (122). The first discharge channel (121) is connected to the first screening path (101), and the second discharge channel (122) is connected to the second screening path (102). The feeding funnel (2) is located at the top of the spiral screening cylinder (1). The narrow end of the feeding funnel (2) is fixedly connected to the fixing rod (11), and the side of the feeding funnel (2) near its narrow end is provided with a feeding port (201) so that the seeds can enter the first screening path (101) through the feeding port (201).
2. The seed screening device according to claim 1, characterized in that: The length of the spiral screen plate (13) near the end of the feed hopper (2) increases sequentially in the descending direction.
3. The seed screening device according to claim 2, characterized in that: A baffle plate (131) is fixedly installed at one end of the spiral screening plate (13) near the feed hopper (2). One side of the baffle plate (131) is fixedly connected to the fixing rod (11), and the bottom of the baffle plate (131) is fixedly connected to the longest spiral screening plate (13).
4. The seed screening device according to claim 1, characterized in that: It also includes a frame (3), which is sleeved on the spiral screening cylinder (1) and is fixedly connected to the spiral screening cylinder (1) and the feed funnel (2) respectively.
5. The seed screening device according to claim 4, characterized in that: A feeding mechanism is provided on one side of the frame (3). The feeding mechanism includes a fixed frame (4) and a feeding hopper (41). One side of the fixed frame (4) is fixedly connected to the frame (3). The two sides of one end of the feeding hopper (41) are slidably connected to the fixed frame (4). The feeding hopper (41) is connected to the fixed frame (4) through a lifting mechanism so that the feeding hopper (41) can move above the feeding funnel (2). A feeding port (411) is provided above the feeding hopper (41). A discharge port (412) is provided through the side of the feeding hopper (41) near the fixed frame (4). A baffle (413) is provided at the discharge port (412). One end of the baffle (413) is rotatably connected to the bottom of the feeding hopper (41). A limiting plate (42) is provided on the fixed frame (4). The limiting plate (42) abuts against the baffle (413) so that the baffle (413) closes the discharge port (412). When the feeding hopper (41) moves above the feeding funnel (2), the baffle (413) leaves the limiting plate (42) and rotates open so that the seeds in the feeding hopper (41) are discharged into the feeding funnel (2) through the discharge port (412).
6. The seed screening device according to claim 5, characterized in that: The lifting mechanism includes a dual-shaft winch (5), and the two winding ends of the dual-shaft winch (5) are respectively provided with traction ropes (51). The end of the traction rope (51) away from the dual-shaft winch (5) is connected to the feeding hopper (41).
7. A seed screening device according to claim 5, characterized in that: The top of the limiting plate (42) has a rounded corner structure.