A light-weight small-grain seed screening machine

Abstract

The application discloses a light small-particle seed screening machine and relates to the technical field of seed screening equipment. The application comprises a machine shell, a first-stage vibrating screen, a second-stage vibrating conveying screen and an electrostatic dust collector. The first-stage vibrating screen is installed at an inlet and has a screen hole diameter larger than the diameter of the seeds. The second-stage vibrating conveying screen is installed on the inner wall of the machine shell below the first-stage vibrating screen, has an inlet corresponding to the outlet of the first-stage vibrating screen, and has an outlet downwardly inclined and connected to an outlet. The screen hole diameter of the second-stage vibrating conveying screen is smaller than the diameter of the seeds. The electrostatic dust collector is arranged above the second-stage vibrating conveying screen and installed on the inner wall of the other end of the machine shell. The multi-stage screening and the electrostatic dust collector can more fully screen out various impurities such as large and small chaff and fine soil mixed in the seeds, and the screening is complete, so that the small-particle seeds are more clean.

Description

Technical Field

[0001] This invention relates to the field of seed screening equipment technology, and more specifically to a lightweight small-particle seed screening machine. Background Technology

[0002] Most herbaceous and medicinal plants have relatively small seeds. For example, Rhodiola rosea seeds are banana-shaped, ranging from 1.12 to 1.86 mm in length and 0.16 to 0.48 mm in width. The seed coat is light to dark brown with multiple longitudinal ridges on the surface, and the seeds have relatively coarse ridges on both sides. Usually, after harvesting, the seeds are mixed with a large amount of seed coat, dried petals, pedicels, and other impurities, so they need to be separated through screening.

[0003] Currently, most seed separation technologies are applicable to large seeds or seeds with a certain weight. There is a gap in the separation of small seeds. For small and light seeds, it is difficult to distinguish them among many impurities. Traditional winnowing and existing screening equipment cannot be used for separation, making it impossible to select seeds with high purity. This restricts the subsequent determination of germination rate, thousand-seed weight, etc., and makes it impossible to know the exact number of seeds and calculate the sowing amount, causing trouble for the commercial sale of small seeds.

[0004] Therefore, there is an urgent need for a device that can quickly separate small seeds from impurities. Summary of the Invention

[0005] In view of this, the present invention aims to provide a lightweight small-particle seed screening machine to at least partially solve the technical problem in the prior art that lightweight small-particle seeds are not easy to separate and cannot be finely screened.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A lightweight small-particle seed screening machine, comprising:

[0008] The housing has two oppositely arranged ends, with an inlet at the top of one end and an outlet on the lower side wall.

[0009] A primary vibrating screen is installed at the feed inlet, and the screen aperture of the primary vibrating screen is larger than the diameter of the seed.

[0010] A secondary vibrating conveyor screen is installed on the inner wall of the casing below the primary vibrating screen. Its inlet end corresponds to the outlet end of the primary vibrating screen, and its outlet end is inclined downward and connected to the outlet. The screen hole diameter of the secondary vibrating conveyor screen is smaller than the diameter of the seed.

[0011] A dust collection tray is provided at the lower part of the machine housing, and the dust collection tray extends through the dust collection tray installation port to the lower part of the secondary vibrating conveyor screen.

[0012] An electrostatic vacuum cleaner is arranged above the secondary vibrating conveyor screen and installed on the inner wall of the other end of the housing.

[0013] The beneficial effects achievable by this invention are as follows: Larger impurities are screened out by a primary vibrating screen, while small seeds and smaller impurities fall onto a secondary vibrating conveyor screen. The secondary vibrating conveyor screen screens out small impurities such as dust, which fall into a dust collection tray. When the small seeds and a few seed coats of similar size are conveyed by the secondary vibrating conveyor screen to the area below the electrostatic dust collector, the lighter seed coats and other impurities are adsorbed by the electrostatic dust collector. The small seeds are then conveyed by the secondary vibrating conveyor screen to the discharge port, completing the fine screening of small seeds and obtaining cleaner seeds.

[0014] Preferably, the electrostatic vacuum cleaner includes a fixed frame and an electrostatic suction rod. The fixed frame is installed on the inner wall of the other side of the housing. The electrostatic suction rod is arranged parallel to the secondary vibrating conveyor screen and installed at the bottom of the fixed frame above the secondary vibrating conveyor screen. The electrostatic suction rod has a first end and a second end arranged opposite to each other. The first end is arranged corresponding to the inlet, and the second end is arranged corresponding to the outlet, with the first end being higher than the second end.

[0015] Preferably, a dust removal mechanism for the electrostatic suction stick is also provided. The dust removal mechanism for the electrostatic suction stick includes an annular electric slide rail, a slider, a bracket, and a wiping strip. The annular electric slide rail is installed on the inner wall of the top of the housing above the electrostatic suction stick. The slider is slidably connected to the annular electric slide rail from the first end to the second end. The bracket is fixed on the slider and its bottom end extends to the bottom of the electrostatic suction stick. The wiping strip is installed at the lower end of the bracket and its top wiping surface corresponds to the adsorption surface at the bottom of the electrostatic suction stick.

[0016] Preferably, the bracket includes an elastic telescopic support rod and a wiping strip mounting bracket. The top of the elastic telescopic support rod is connected to the bottom of the slider, and the wiping strip mounting bracket is connected to the bottom of the elastic telescopic support rod. It has a suction rod inlet that extends along the axial direction of the electrostatic suction rod, and the wiping strip is mounted on the bottom wall of the suction rod inlet.

[0017] Preferably, the elastic telescopic support rod includes a fixed rod, a spring, and a sliding rod. The top of the fixed rod is fixed to the slider, and a slot is provided at the bottom along its axial direction. The spring is placed in the slot. The upper end of the sliding rod is slidably connected in the slot, and its top surface abuts against the bottom end of the spring. The wiping strip mounting bracket is fixed to the lower end of the sliding rod.

[0018] Preferably, the assembly also includes a wiping strip fastening component, which includes a locking bolt and a pressure block. The wiping strip mounting bracket has symmetrically arranged wiping strip through holes on both sides of its side walls, which are connected to the suction rod's through-hole. The two ends of the wiping strip are respectively inserted into the two wiping strip through holes. The pressure block is rotatably mounted on the locking bolt, and its bottom end can be pressed against the top surface of the wiping strip and locked by the locking bolt.

[0019] Preferably, a dust collection trough is also provided, which is installed at the bottom of the wiping strip mounting bracket.

[0020] Preferably, the wiping strip humidification assembly includes a nozzle mounting bracket and an atomizing nozzle. The wiping strip mounting bracket has an avoidance through-hole on its side wall. One end of the nozzle mounting bracket is fixed to the inner wall of the housing, and the other end extends to the direction of the first end of the electrostatic dust-collecting rod and can pass through the avoidance through-hole corresponding to the top of the wiping strip. The atomizing nozzle is mounted on the other end of the nozzle mounting bracket, and its spray nozzle corresponds to the wiping surface at the top of the wiping strip.

[0021] Preferably, the wiping strip cleaning assembly includes a brush mounting bracket and a brush. One end of the brush mounting bracket is fixed to the inner wall of the housing, and the other end extends to the direction of the second end of the electrostatic dust-collecting rod and can pass through the clearance opening corresponding to the top of the wiping strip. The brush is mounted on the other end of the brush mounting bracket, and the cleaning surface at its bottom can rub against the wiping surface at the top of the wiping strip.

[0022] Preferably, a drying device is installed on the inner wall of the housing.

[0023] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a lightweight small-particle seed screening machine. Through multi-stage screening and electrostatic dust collector, it can more thoroughly remove various impurities such as large and small chaff and fine soil mixed in the seeds, resulting in more thorough screening and cleaner small-particle seeds. The dust removal mechanism of the suction stick can clean the surface of the suction stick, ensuring the adsorption capacity of the electrostatic suction stick, and ensuring screening efficiency and seed quality. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0025] Figure 1 This is a three-dimensional structural diagram of a lightweight small-particle seed screening machine provided by the present invention.

[0026] Figure 2 This is a cross-sectional structural diagram of a lightweight small-particle seed screening machine provided by the present invention.

[0027] Figure 3 for Figure 2 Schematic diagram of the AA section structure.

[0028] Figure 4 This is a side view cross-sectional structural diagram of a lightweight small-particle seed screening machine provided by the present invention.

[0029] Figure 5 This is a side view of the support structure provided by the present invention.

[0030] Figure 6 This is a schematic diagram of the main cross-sectional structure of the bracket provided by the present invention.

[0031] In the diagram: 1. Machine casing; 11. Feed inlet; 12. Discharge outlet; 2. Primary vibrating screen; 3. Secondary vibrating conveyor screen; 4. Dust collection tray; 41. Handle; 5. Electrostatic dust collector; 51. Fixing frame; 52. Electrostatic dust collector rod; 6. Dust removal mechanism with dust collector rod; 61. Circular electric slide rail; 62. Slider; 63. Bracket; 631. Elastic telescopic support rod; 6311. Fixing rod; 6312. Spring; 6313. Sliding rod; 63 2. Wiping strip mounting bracket, 6321. Dust suction stick inlet, 6322. Wiping strip perforation, 6323. Clearance opening, 64. Wiping strip, 65. Wiping strip fastening assembly, 651. Locking bolt, 652. Pressure block, 66. Dust collection tank, 7. Wiping strip humidification assembly, 71. Nozzle mounting bracket, 72. Atomizing nozzle, 8. Wiping strip cleaning assembly, 81. Brush mounting bracket, 82. Brush, 9. Drying device, 10. Seed collection tank. Detailed Implementation

[0032] 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.

[0033] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this invention.

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] Please see Figures 1-6 This invention discloses a lightweight small-particle seed screening machine, comprising:

[0036] The housing 1 has two oppositely arranged ends, with an inlet 11 at the top of one end and an outlet 12 on the lower side wall.

[0037] A primary vibrating screen 2 is installed at the feed inlet 11, and the screen aperture of the primary vibrating screen 2 is larger than the diameter of the seeds.

[0038] The secondary vibrating conveyor screen 3 is installed on the inner wall of the casing 1 below the primary vibrating screen 2. Its feed end corresponds to the discharge end of the primary vibrating screen 2. The discharge end is inclined downward and connected to the discharge port 12. The screen hole diameter of the secondary vibrating conveyor screen 3 is smaller than the diameter of the seed.

[0039] Dust collection disc 4; a dust collection disc mounting port is provided at the lower part of the casing 1; the dust collection disc 4 extends through the dust collection disc mounting port to the lower part of the secondary vibrating conveyor screen 3.

[0040] The electrostatic vacuum cleaner 5 is arranged above the secondary vibrating conveyor screen 3 and installed on the inner wall of the other end of the casing 1.

[0041] When used for screening Rhodiola rosea seeds, the primary vibrating screen 2 uses a 0.3-0.5mm mesh screen to screen out large chaff, leaving seeds, small chaff, and fine soil. The secondary vibrating screen uses a 0.15-0.2mm mesh screen to screen out seeds and small chaff. Fine soil and small chaff fall into the dust collection tray 4. Seeds and small chaff are trapped on the secondary vibrating conveyor screen 3 and conveyed to the electrostatic dust collector 5. Lighter impurities such as small chaff are adsorbed by the electrostatic dust collector 5. Seeds continue to be conveyed by the secondary vibrating conveyor screen 3 to the discharge port 12, completing the fine screening of small seed particles and obtaining cleaner seeds. In some other embodiments, depending on the size of the seeds to be screened, a screen with a suitable mesh size can be selected.

[0042] In one specific embodiment, the primary vibrating screen 2 includes a first vibrating motor, a first screen and a plurality of first elastic buffers. The first screen is installed at the feed inlet of the housing 1 by a plurality of first elastic buffers arranged at circumferential intervals on the outer periphery of the feed inlet 11. The first vibrating motor is installed on the side wall of the first screen.

[0043] In one specific embodiment, a first feeding hopper is also provided. The first feeding hopper is fixed to the bottom of the first screen, and its discharge end is connected to the feed end of the secondary vibrating conveyor screen 3.

[0044] In one specific embodiment, the secondary vibrating conveyor screen 3 includes a second vibrating motor, a second screen and a plurality of second elastic buffers. The second screen is installed on the inner wall of the casing 1 below the corresponding first hopper through the plurality of second elastic buffers, and its inlet end corresponds to the outlet end of the first hopper. The second vibrating motor is installed on the side wall of the second screen.

[0045] In one specific embodiment, a second feeding hopper (not shown in the figure) is also provided. The second feeding hopper is fixed to the bottom of the second screen and its discharge end is connected to the dust collection disc 4.

[0046] In one specific embodiment, the shape of the second screen can be customized according to the size of the installation site. For example, the screen surface of the second screen can be straight or U-shaped. When the screen surface is straight, the discharge port 12 is opened on the side of the housing 1 away from the primary vibrating screen 2; when it is U-shaped, the discharge port 12 is set on the side of the housing 1 close to the primary vibrating screen 2.

[0047] In one specific embodiment, the electrostatic vacuum cleaner 5 includes a fixing frame 51 and an electrostatic vacuuming rod 52. The fixing frame 51 is installed on the inner wall of the other side of the housing 1. The electrostatic vacuuming rod 52 is arranged parallel to the screen surface of the second screen and installed at the bottom of the fixing frame 51 above the corresponding second screen. The electrostatic vacuuming rod 52 has a first end and a second end arranged opposite to each other. The first end is arranged corresponding to the feed inlet 11, and the second end is arranged corresponding to the discharge outlet 12, with the first end being higher than the second end.

[0048] In one specific embodiment, the electrostatic dust-collecting rod 52 is adapted to the screen surface of the second screen, and can be straight or U-shaped. It is arranged parallel to the screen surface of the corresponding second screen, ensuring that the distance between its adsorption surface and the screen surface of the corresponding second screen is the same at all points. To ensure that the volume of the casing 1 is compatible with the site, the length of the screen surface of the secondary vibrating conveyor screen 3 is extended, and the length of the electrostatic dust-collecting rod 52 is also extended, so as to fully sift out fine soil and adsorb small chaff, obtaining clean small-particle seeds.

[0049] In one specific embodiment, the installation distance between the electrostatic dust-collecting rod 52 and the second screen surface ranges from 3 to 10 cm, and the electrostatic voltage range of the electrostatic dust-collecting rod 52 is 500 volts to 50,000 volts.

[0050] The electrostatic dust collector 52 can use an intermittent electrostatic generator or a continuous electrostatic generator. It is connected to a power cord and a grounding wire. The power cord is connected to a power source to generate static electricity, and the grounding wire is used to discharge the static electricity, preventing excessive accumulation of static electricity on the casing or leakage of the equipment, which could lead to safety accidents.

[0051] In one specific embodiment, a dust removal mechanism 6 is also provided. The dust removal mechanism 6 includes an annular electric slide rail 61, a slider 62, a bracket 63, and a wiping strip 64. The annular electric slide rail 61 is installed on the inner top wall of the housing 1 above the corresponding electrostatic dust removal stick 52. The slider 62 is slidably connected to the annular electric slide rail 61. The bracket 63 is fixed to the slider 62 and its bottom end extends below the electrostatic dust removal stick 52. The wiping strip 64 is installed on the lower part of the bracket 63, and its top wiping surface corresponds to the adsorption surface at the bottom of the electrostatic dust removal stick. The wiping strip 64 can move under the drive of the annular electric slide rail 61 to wipe away the impurities adsorbed at the bottom of the electrostatic dust removal stick.

[0052] In one specific embodiment, the bracket 63 includes an elastic telescopic support rod 631 and a wiping strip mounting bracket 632. The top of the elastic telescopic support rod is connected to the bottom of the slider 62, and the wiping strip mounting bracket 632 is connected to the bottom of the elastic telescopic support rod 631. A suction rod inlet 6321 is provided at the corresponding position of the electrostatic suction rod 52, which extends along the axial direction of the electrostatic suction rod 52. The wiping strip 64 is installed on the inner bottom wall of the suction rod inlet 6321.

[0053] In one specific embodiment, the elastic telescopic support rod 631 includes a fixed rod 6311, a spring 6312, and a sliding rod 6313. The top of the fixed rod 6311 is fixed to the slider 62, and a slot is provided at the bottom along its axial direction. The spring 6312 is placed in the slot. The upper end of the sliding rod 6313 is slidably connected to the slot, and its top surface abuts against the bottom end of the spring 6312. The wiping strip mounting bracket 632 is fixed to the lower end of the sliding rod 6313. When the spring 6312 is in its natural state, the wiping strip 64 can abut against the bottom surface of the electrostatic suction rod 52 at the higher end. As the slider 62 slides, under the pressure of the electrostatic suction rod 52, the spring 6312 gradually extends and ensures close contact with the bottom surface of the electrostatic suction rod 52 for wiping.

[0054] In one specific embodiment, the device further includes a wiping strip fastening assembly 65, which includes a locking bolt 651 and a pressure block 652. The wiping strip mounting bracket 632 has symmetrically arranged wiping strip through holes 6322 on both side walls, communicating with the suction rod insertion inlet 6321. A mounting groove communicating with each through hole 6322 is provided above it. The two ends of the wiping strip 64 are respectively inserted into the two wiping strip through holes 6322. The pressure block 652 is fixed in the mounting groove by the locking bolt 651, and its bottom end can press against the top surface of the wiping strip 64 to fix the wiping strip 64. The pressing surface of the pressure block 652 is arc-shaped to avoid damaging the wiping strip 64. The pressure block 652 has an elongated adjustment hole arranged along the height direction of the wiping strip mounting bracket 632. The locking bolt 651 passes through the elongated adjustment hole and is threaded into the mounting groove, allowing for the use of wiping strips 64 of different thicknesses. Multiple sets of wiping strip fastening components 65 can be provided so that the wiping strip 64 can be laid flat on the wiping strip mounting bracket 632.

[0055] In one specific embodiment, a dust collection trough 66 is also provided. The dust collection trough 66 is installed below the wiping strip mounting bracket 632. Limiting pins 67 are symmetrically installed on the lower part of the two side walls of the wiping strip mounting bracket 632. U-shaped holes are symmetrically opened on the two side walls of the dust collection trough 66, and one end of the U-shaped hole passes through its top wall to form an opening. The limiting pins 67 can slide from the opening end of the U-shaped hole to its other end and engage with it. The dust collection trough 66 is used to collect impurities that fall off when the electrostatic dust suction rod 52 is cleaning, preventing impurities from falling back onto the second screen.

[0056] In one specific embodiment, the wiping strip 64 is made of disposable wet wipes, which can be replaced with new wipes when they become soiled. In some other embodiments, the wiping strip 64 is made of reusable materials such as cotton cloth, chamois leather, or high-density sponge, which can be washed and reused, making it more environmentally friendly.

[0057] In one specific embodiment, a wiping strip humidification assembly 7 is also provided. The humidification assembly includes a nozzle mounting bracket 71 and an atomizing nozzle 72. A clearance through-hole 6323 is provided on the side wall of the wiping strip mounting bracket 71. One end of the nozzle mounting bracket 71 is fixed to the inner wall of the housing 1, and the other end extends to the direction of the first end of the electrostatic dust-collecting rod 52 and can pass through the clearance through-hole 6323 corresponding to the top of the wiping strip 64. The atomizing nozzle 72 is installed at the other end of the nozzle mounting bracket 71, and its spray nozzle corresponds to the wiping surface at the top of the wiping strip 64. The atomizing nozzle 72 is connected to an external water supply device through a water pipe.

[0058] The wiping strip 64 can be pre-wetted before installation to prevent the water from evaporating too quickly. If the wiping strip is not wet enough during use, the fine water mist sprayed by the humidification component can be used to ensure the moisture content of the surface of the wiping strip 64.

[0059] In one specific embodiment, a wiping strip cleaning assembly 8 is also provided. The wiping strip cleaning assembly 8 includes a brush mounting bracket 81 and a brush 82. One end of the brush mounting bracket 81 is fixed to the inner wall of the housing 1, and the other end extends to the direction of the second end of the electrostatic dust-collecting rod 52 and can pass through the clearance opening 6323 corresponding to the top of the wiping strip 64. The brush 82 is installed at the other end of the brush mounting bracket 81, and its bottom cleaning surface can rub against the top wiping surface of the wiping strip 64 to clean the small chaff adhering to the surface of the wiping strip 64.

[0060] The brush mounting bracket 81 and the nozzle mounting bracket 71 are at the same height and can both pass through the clearance opening 6323 at the natural length of the spring 6312. There is a sliding gap between the brush mounting bracket 81 and the inner wall of the clearance opening 6323. When the brush 82 is brushing the small chaff on the wiping strip 64, the wiping strip mounting bracket 632 will not move vertically, preventing the brush 82 from failing to brush the wiping surface of the wiping strip 64.

[0061] In one specific embodiment, a drying device 9 is installed on the inner wall of the casing 1. The drying device is used to bake and dry the wiping strip 64 and the electrostatic adsorption environment inside the casing, maintaining the electrostatic adsorption effect. The drying device can be an incandescent lamp, an ultraviolet lamp, or a bathroom heater lamp, etc. It is preferably an ultraviolet lamp. The ultraviolet lamp 9 can be used for disinfection and drying before and after using the machine. The ultraviolet lamp 9 should be turned on for at least 20 minutes for disinfection and sterilization.

[0062] In one specific embodiment, a handle is installed on the dust collection tray 4 to facilitate pulling out the dust collection tray 4 for cleaning.

[0063] In one specific embodiment, a seed collection trough 10 is installed on the outer wall of the housing 1 at the discharge port 12 to collect the small seeds that have been screened out.

[0064] The method of using the small-particle seed screening machine provided by this invention:

[0065] The seeds to be screened are poured onto the first screen. After screening, large chaff and other impurities are trapped on the first screen, while the seeds, small impurities, and fine soil fall onto the second screen. After screening on the second screen, fine soil and other small impurities fall into the dust collection tray 4, while the seeds and small chaff are trapped on the second screen and conveyed to the discharge port 12 under the action of gravity. During the conveying process, when passing under the electrostatic dust collector 5, the lighter small chaff and other impurities are adsorbed by the electrostatic dust collector 5, and the seeds are discharged from the discharge port 12, resulting in clean small seed particles.

[0066] The electrostatic vacuum cleaner 5 has accumulated a lot of impurities. When cleaning is needed, the electric slide rail is activated, and the wet wiping strip 64 is used to clean the impurities adsorbed at the bottom of the electrostatic vacuum cleaner 5. During the cleaning process, some impurities remain on the wiping strip 64, while some are pushed into the dust collection tank 66. After wiping, the electrostatic vacuum cleaner 5 is dried by the drying device 9, while the wiping strip 64 continues to rotate to the wiping strip cleaning component 8, where it is brushed by the brush 82, sweeping the surface impurities into the dust collection tank 66. After cleaning, an appropriate amount of water mist is sprayed onto the surface of the wiping strip 64 through the atomizing nozzle 72 to ensure the moisture of the wiping strip 64 for the next cleaning.

[0067] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0068] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lightweight small-particle seed screening machine, characterized in that, include: The housing (1) has two oppositely arranged ends, with an inlet (11) at the top of one end and an outlet (12) on the lower side wall. A primary vibrating screen (2) is installed at the feed inlet (11), and the sieve hole diameter of the primary vibrating screen (2) is larger than the diameter of the seed. A secondary vibrating conveyor screen (3) is installed on the inner wall of the casing (1) below the primary vibrating screen (2). Its feed end corresponds to the discharge end of the primary vibrating screen (2), and its discharge end is inclined downward and connected to the discharge port (12). The screen hole diameter of the secondary vibrating conveyor screen (3) is smaller than the diameter of the seed. Dust collection disc (4), the lower part of the housing (1) is provided with a dust collection disc installation port, the dust collection disc (4) extends through the dust collection disc installation port to the lower part of the secondary vibrating conveyor screen (3); An electrostatic vacuum cleaner (5) is arranged above the secondary vibrating conveyor screen (3) and installed on the inner wall of the other side of the housing (1); The electrostatic vacuum cleaner (5) includes a fixed frame (51) and an electrostatic vacuuming rod (52). The fixed frame (51) is installed on the inner wall of the other side of the housing (1). The electrostatic vacuuming rod (52) is arranged parallel to the secondary vibrating conveyor screen (3) and installed at the bottom of the fixed frame (51) above the secondary vibrating conveyor screen (3). The primary vibrating screen (2) is used to screen out large rice bran, leaving seeds, small rice bran, and fine soil. The secondary vibrating conveyor screen (3) is used to screen out seeds and small rice bran. Fine soil and small rice bran fall into the dust collection tray (4). Seeds and small rice bran are trapped on the mesh surface of the secondary vibrating conveyor screen (3) and then conveyed to the electrostatic dust collector (5). Lighter impurities such as small rice bran are adsorbed by the electrostatic dust collector (5). Seeds continue to be conveyed to the discharge port (12) along with the secondary vibrating conveyor screen (3), completing the fine screening of small seeds and obtaining cleaner seeds.

2. The lightweight small-particle seed screening machine according to claim 1, characterized in that, A dust removal mechanism (6) is also provided. The dust removal mechanism (6) includes an annular electric slide rail (61), a slider (62), a bracket (63), and a wiping strip (64). The annular electric slide rail (61) is installed on the inner top of the housing (1) above the electrostatic dust removal stick (52). The slider (62) is slidably connected to the annular electric slide rail (61). The bracket (63) is fixed on the slider (62) and its bottom end extends to the bottom of the electrostatic dust removal stick (52). The wiping strip (64) is installed at the lower end of the bracket (63) and its top wiping surface corresponds to the adsorption surface at the bottom of the electrostatic dust removal stick (52).

3. The lightweight small-particle seed screening machine according to claim 2, characterized in that, The bracket (63) includes an elastic telescopic support rod (631) and a wiping strip mounting bracket (632). The top of the elastic telescopic support rod is connected to the bottom of the slider (62), and the wiping strip mounting bracket (632) is connected to the bottom of the elastic telescopic support rod (631). A suction rod inlet (6321) is provided at the location corresponding to the electrostatic suction rod (52) and extends along the axial direction of the electrostatic suction rod (52). The wiping strip (64) is installed on the bottom wall of the suction rod inlet (6321).

4. The lightweight small-particle seed screening machine according to claim 3, characterized in that, The elastic telescopic support rod (631) includes a fixed rod (6311), a spring (6312), and a sliding rod (6313). The top of the fixed rod (6311) is fixed to the slider (62), and a slot is provided at the bottom along its axial direction. The spring (6312) is placed in the slot. The upper end of the sliding rod (6313) is slidably connected in the slot and its top surface abuts against the bottom end of the spring (6312). The wiping strip mounting bracket (632) is fixed to the lower end of the sliding rod (6313).

5. A lightweight small-particle seed screening machine according to claim 4, characterized in that, It also includes a wiping strip fastening assembly (65), which includes a locking bolt (651) and a pressure block (652). The wiping strip mounting bracket (632) has symmetrical wiping strip through holes (6322) on both sides, which are connected to the vacuum cleaner through-hole (6321). The two ends of the wiping strip (64) are respectively inserted into the two wiping strip through holes (6322). The pressure block (652) is fixed on the outer side wall of the wiping strip mounting bracket (632) by the locking bolt (651) and its bottom end can be pressed against the top surface of the wiping strip (64).

6. A lightweight small-particle seed screening machine according to claim 3, characterized in that, It is also provided with a dust collection tank (66), which is installed at the bottom of the wiping strip mounting bracket (632).

7. A lightweight small-particle seed screening machine according to claim 3, characterized in that, The wiping strip humidification assembly (7) is also provided. The wiping strip humidification assembly (7) includes a nozzle mounting bracket (71) and an atomizing nozzle (72). The electrostatic dust-collecting rod (52) has a first end and a second end arranged opposite to each other. The first end is arranged corresponding to the inlet (11), and the second end is arranged corresponding to the outlet (12), with the first end being higher than the second end. The wiping strip mounting bracket (632) has an avoidance through-hole (6323) on its side wall. One end of the nozzle mounting bracket (71) is fixed to the inner wall of the housing (1), and the other end extends to the direction of the first end of the electrostatic dust-collecting rod (52) and can pass through the avoidance through-hole (6323) corresponding to the top of the wiping strip (64). The atomizing nozzle (72) is installed at the other end of the nozzle mounting bracket (71), and its spray nozzle corresponds to the wiping surface at the top of the wiping strip (64).

8. A lightweight small-particle seed screening machine according to claim 7, characterized in that, The wiping strip cleaning assembly (8) is also provided. The wiping strip cleaning assembly (8) includes a brush mounting bracket (81) and a brush (82). One end of the brush mounting bracket (81) is fixed on the inner wall of the housing (1), and the other end extends to the second end of the electrostatic dust suction stick (52) and can pass through the clearance opening (6323) corresponding to the top of the wiping strip (64). The brush (82) is installed on the other end of the brush mounting bracket (81), and its bottom cleaning surface can rub against the top wiping surface of the wiping strip (64).

9. A lightweight small-particle seed screening machine according to any one of claims 1-8, characterized in that, A drying device (9) is installed on the inner wall of the housing (1).

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