Seed screening device

Abstract

This disclosure relates to a seed screening device, comprising: a screening chamber, a filter plate, a blower, an impurity collection chamber, and a receiving box. The screening chamber holds the seeds to be screened and has a discharge port at its bottom, facing a first direction. The filter plate is positioned facing the discharge port and is inclined relative to the first direction, with a mesh size smaller than the seed size. The blower is located on the side of the filter plate away from the screening chamber. The impurity collection chamber includes an impurity channel, one end of which and the blower are located on opposite sides of the filter plate in the first direction. The receiving box is located at the lower end of the inclined filter plate and is used to collect the screened seeds. During the process of the seeds falling onto the filter plate and rolling on the filter plate, the blower blows lighter impurities from the seeds into the impurity collection chamber through the impurity channel, while the remaining seeds roll down the filter plate into the receiving box, thereby separating the impurities from the seeds.

Description

Technical Field

[0001] This disclosure relates to the field of agricultural machinery and equipment technology, and in particular to a seed screening device. Background Technology

[0002] As a fundamental material in agricultural production, the purity and particle size uniformity of seeds directly affect sowing precision, germination rate, and the uniformity of subsequent crop growth. In the seed production, processing, and distribution stages, screening is one of the core pretreatment processes. By separating impurities from seeds and selecting those that meet the particle size requirements, it lays a quality foundation for subsequent seed coating, packaging, and sowing, while simultaneously improving the commercial value of seeds and agricultural production efficiency. In existing technologies, during seed harvesting, due to the working principle of harvesting machinery or improper operation, some seed leaves may be harvested along with the seeds, resulting in a mixture of seeds and leaves. This mixture of broken leaves reduces seed purity and affects germination rate and growth vigor. Therefore, how to screen out impurities from the seeds to be screened has become a technical problem urgently needing to be solved by those skilled in the art. Utility Model Content

[0003] To overcome the problems existing in related technologies, this disclosure provides a seed screening device, comprising: A screening chamber is used to hold seeds to be screened. The bottom of the screening chamber is provided with a discharge port, which faces a first direction. A filter plate is disposed facing the discharge port, the filter plate is inclined relative to the first direction, and the mesh size of the filter plate is smaller than the size of the seed; A blower is installed on the side of the filter plate away from the screening chamber; An impurity collection chamber is used to collect impurities blown out by the blower from the seeds to be screened. The impurity collection chamber includes an impurity channel, one end of which is located on opposite sides of the filter plate in the first direction, along with the blower. A receiving box, located at the lower end of the inclined filter plate, is used to collect the sieved seeds.

[0004] In some embodiments, the screening bin further includes a guide plate; The guide plate is disposed inside the cavity of the screening chamber. The guide plate is inclined relative to the first direction. The discharge port is disposed at the lower end of the inclined guide plate. The opposite sides of the guide plate form the inner sidewall of the screening chamber and the inner sidewall of the impurity channel, respectively.

[0005] In some embodiments, the seed screening device further includes a sieve plate and a drive device; The sieve plate is movably connected to the screening chamber, the discharge port and the filter plate are located on opposite sides of the sieve plate, and the aperture of the sieve plate is larger than the size of the seed; The drive end of the drive device is connected to the sieve plate, and the drive device is used to drive the sieve plate to reciprocate along the second direction.

[0006] In some embodiments, the seed screening device further includes a housing, and the drive device includes a drive shaft and a connecting rod; The screening chamber is located inside the cavity of the outer shell; The connecting rod is disposed on the outside of the housing, and the sieve plate passes through the housing at opposite ends in the second direction and is connected to the connecting rod; One end of the drive shaft is connected to the drive end of the drive device, and the other end of the drive shaft passes through the housing and is connected to the connecting rod.

[0007] In some embodiments, the portion of the drive shaft located inside the cavity of the housing is provided with a material feeding plate; At least a portion of the feeding plate is located inside the discharge port.

[0008] In some embodiments, the seed screening device further includes a first anti-blocking device; The first anti-clogging device is located on the side of the sieve plate away from the screening chamber.

[0009] In some embodiments, the impurity collection chamber further includes a breathable filter plate; The two ends of the impurity channel are respectively oriented towards the air-permeable filter plate and the fan.

[0010] In some embodiments, the impurity collection chamber further includes a second anti-clogging device; The second anti-clogging device is located on the side of the breathable filter plate facing the impurity channel.

[0011] In some embodiments, the impurity collection chamber further includes a drive rod; One end of the transmission rod is connected to the second anti-clogging device, and the other end of the transmission rod is connected to the sieve plate and / or the driving device. The transmission rod is used to drive the second anti-clogging device to move along the side of the air-permeable filter plate.

[0012] In some embodiments, the impurity collection chamber further includes an impurity box; The opening of the impurity box is connected to the impurity channel, and the air-permeable filter plate is located between the impurity box and the impurity channel. The technical solutions provided by the embodiments of this disclosure can include the following beneficial effects: When the seeds to be screened fall from the discharge port onto the filter plate, because the mesh size of the filter plate is smaller than the size of the seeds, the seeds of the correct size will roll onto the inclined filter plate towards the receiving box. During the process of the seeds falling onto the filter plate and rolling on the filter plate, a fan located on one side of the filter plate blows the lighter impurities in the seeds into the impurity collection chamber through the impurity channel, while the heavier seeds that are not blown into the impurity channel roll down the filter plate into the receiving box, thereby separating the impurities from the seeds.

[0013] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0014] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0015] Figure 1 This is a schematic diagram of the structure of a seed screening device according to some embodiments of the present disclosure; Figure 2 This is a schematic diagram of the structure of a seed screening device from another perspective, according to some embodiments of the present disclosure; Figure 3 This is a cross-sectional view of a seed screening device according to some embodiments of the present disclosure; Figure 4 This is a cross-sectional view of an impurity collection chamber shown according to some embodiments of the present disclosure. Detailed Implementation

[0016] Some embodiments of this disclosure will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. Various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will become apparent upon understanding this disclosure. For example, the order of operations described herein is merely illustrative and is not limited to those orders set forth herein, but can be changed as will become apparent upon understanding this disclosure, except for operations that must be performed in a particular order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0017] The embodiments described in the following examples of this disclosure are not representative of all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0018] As a fundamental material in agricultural production, the purity and particle size uniformity of seeds directly affect sowing precision, germination rate, and the uniformity of subsequent crop growth. In the seed production, processing, and distribution stages, screening is one of the core pretreatment processes. By separating impurities from seeds and selecting those that meet the particle size requirements, it lays a quality foundation for subsequent seed coating, packaging, and sowing, while simultaneously improving the commercial value of seeds and agricultural production efficiency. In existing technologies, during seed harvesting, due to the working principle of harvesting machinery or improper operation, some seed leaves may be harvested along with the seeds, resulting in a mixture of seeds and leaves. This mixture of broken leaves reduces seed purity and affects germination rate and growth vigor. Therefore, how to screen out impurities from the seeds to be screened has become a technical problem urgently needing to be solved by those skilled in the art.

[0019] In view of this, some embodiments of this disclosure provide a seed screening device. Figure 1 This is a schematic diagram of the structure of a seed screening device according to some embodiments of the present disclosure. Figure 2 This is a schematic diagram of the structure of a seed screening device from another perspective, according to some embodiments of the present disclosure. Figure 3 This is a cross-sectional view of a seed screening device according to some embodiments of the present disclosure. Figure 4 This is a cross-sectional view of an impurity collection chamber shown according to some embodiments of the present disclosure, such as... Figures 1 to 4 As shown, the seed screening device includes: a screening chamber 100, a filter plate 304, a blower 303, an impurity collection chamber, and a receiving box 207. The screening chamber 100 is used to hold the seeds to be screened, and has a discharge port 110 at its bottom, facing a first direction. The filter plate 304 is positioned facing the discharge port 110 and is inclined relative to the first direction; the mesh size of the filter plate 304 is smaller than the size of the seeds. The blower 303 is located on the side of the filter plate 304 away from the screening chamber 100. The impurity collection chamber is used to collect impurities blown out of the seeds by the blower 303. The impurity collection chamber includes an impurity channel 410, one end of which and the blower 303 are located on opposite sides of the filter plate 304 in the first direction. The receiving box 207 is located at the lower end of the inclined filter plate 304 and is used to collect the screened seeds.

[0020] It should be noted that in some embodiments of this disclosure, the first direction can be the direction of gravity, that is, the seed can fall freely along the first direction.

[0021] The seeds to be screened, placed in the screening chamber 100, contain lighter impurities such as leaves and dust. When the seeds fall from the outlet 110 onto the filter plate 304, because the mesh size of the filter plate 304 is smaller than the size of the seeds, the seeds of the correct size will roll onto the inclined filter plate 304 and onto the receiving box 207. During the process of the seeds falling onto the filter plate 304 and rolling on the filter plate 304, the blower 303 located on one side of the filter plate 304 blows the lighter impurities in the seeds into the impurity collection chamber through the impurity channel 410. The heavier seeds that are not blown into the impurity channel 410 roll down the filter plate 304 into the receiving box 207, thereby separating the impurities from the seeds.

[0022] In some embodiments, such as Figure 3 As shown, the screening chamber 100 also includes a guide plate 200; the guide plate 200 is disposed inside the cavity of the screening chamber 100, and is inclined relative to the first direction. The discharge port 110 is disposed at the lower end of the inclined guide plate 200. The opposite sides of the guide plate 200 form the inner sidewall of the screening chamber 100 and the inner sidewall of the impurity channel 410, respectively. The inclined guide plate 200 divides the internal cavity of the seed screening device into the screening chamber 100 and the impurity channel 410.

[0023] Furthermore, such as Figure 3 As shown, the guide plate 200 includes a first side 210 and a second side 220. The inclined first side 210 facilitates the sliding of the seeds to be screened in the screening chamber 100 to the discharge port 110, and the inclined second side 220 facilitates the guidance of impurities blown out by the blower 303, making the movement of impurities in the impurity channel 410 smoother.

[0024] In some embodiments, the guide plate 200 may be funnel-shaped, or two or more may be provided, so that the seeds to be screened in the screening chamber 100 can slide down to the discharge port 110.

[0025] In some embodiments, the seed screening device further includes a sieve plate 201 and a drive device 206; the sieve plate 201 is movably connected to the screening chamber 100, and the discharge port 110 and the filter plate 304 are respectively located on opposite sides of the sieve plate 201, and the aperture of the sieve plate 201 is larger than the size of the seeds; the drive end of the drive device 206 is connected to the sieve plate 201, and the drive device 206 is used to drive the sieve plate 201 to reciprocate along a second direction. Before the seeds to be screened fall onto the filter plate 304, they are first screened by the sieve plate 201. Since the aperture of the sieve plate 201 is larger than the size of the seeds, the sieve plate 201 can screen out impurities larger than the seeds. After passing through the sieve plate 201, the seeds and lighter impurities are screened a second time by the blower 303 and the filter plate 304. Furthermore, when the sieve plate 201 performs the first screening of the seeds to be screened, the sieve plate 201 reciprocates along the second direction, which allows relative motion between the seeds to be screened and the sieve plate 201, thereby improving the screening efficiency of the seeds to be screened.

[0026] In some embodiments, the seed sieving device further includes a housing 500, with the sieving chamber 100 located inside the cavity of the housing 500, such as... Figures 1 to 3 As shown, the outer casing 500 provides the mounting base for the various components in the seed screening device. The drive unit 206 includes a drive shaft 205 and a connecting rod 202; the connecting rod 202 is located on the outside of the outer casing 500, and the sieve plate 201 penetrates the outer casing 500 at opposite ends in a second direction and is connected to the connecting rod 202; one end of the drive shaft 205 is connected to the drive end of the drive unit 206, and the other end of the drive shaft 205 penetrates the outer casing 500 and is connected to the connecting rod 202. The sieve plate 201, which penetrates the outer casing 500, provides a larger usable screening area inside the cavity of the outer casing 500, thereby improving the screening efficiency of the seeds to be screened. Furthermore, the drive unit 206 and the connecting rod 202 for transmission are located on opposite sides of the outer casing 500, resulting in a more reasonable spatial distribution, which is beneficial for the overall miniaturization of the seed screening device.

[0027] In some embodiments, one end of the drive shaft 205 is provided with a linkage turntable 204, and both ends of the connecting rod 202 are respectively connected to the two ends of the sieve plate 201 penetrating the outer casing 500. The middle of the connecting rod 202 is provided with a linkage sliding hole 210 that matches the linkage turntable 204. One side of the linkage turntable 204 is connected to the drive shaft 205, and the other side of the linkage turntable 204 is provided with a transmission pin 203. The transmission pin 203 is eccentrically set with the drive shaft 205 and is located inside the linkage sliding hole 210. Thus, when the drive device 206 drives the drive shaft 205 to rotate, the transmission pin 203 performs a circular motion. The length direction of the linkage sliding hole 210 is in the same direction as the first direction. Therefore, during the circular motion of the transmission pin 203, it slides within the linkage sliding hole 210 and drives the connecting rod 202 to reciprocate in a second direction perpendicular to the first direction, thereby driving the sieve plate 201 to reciprocate in the second direction.

[0028] Furthermore, the seed screening device also includes a first anti-clogging device 209; the first anti-clogging device 209 is disposed on the side of the sieve plate 201 opposite to the screening chamber 100. The first anti-clogging device 209 is fixed to the inner wall of the outer casing 500, that is, during the reciprocating motion of the sieve plate 201, the first anti-clogging device 209 also moves relative to the sieve plate 201. Moreover, one end of the first anti-clogging device 209 contacts the sieve plate 201 to prevent seeds or impurities from clogging the holes of the sieve plate 201 and affecting the screening efficiency.

[0029] In some embodiments, the first anti-clogging device 209 has a plate-like structure, with one end of the first anti-clogging device 209 contacting the sieve plate 201 to prevent seeds or impurities from clogging the holes of the sieve plate 201. Multiple first anti-clogging devices 209 are provided, and the multiple first anti-clogging devices 209 are arranged along a second direction.

[0030] In some embodiments, a portion of the drive shaft 205 located inside the cavity of the housing 500 is provided with a material-pushing plate 208; at least a portion of the material-pushing plate 208 is located inside the discharge port 110. During the rotation of the drive shaft 205, the material-pushing plate 208 moves with the drive shaft 205, and the material-pushing plate 208 is used to push or block the seeds to be screened in the discharge port 110, so that the seeds to be screened fall more evenly from the discharge port 110.

[0031] In some embodiments, such as Figure 3As shown, there are two guide plates 200, and their lower ends face each other to form an elongated discharge port 110. Arc-shaped grooves 211 are respectively formed on the two opposing inner sidewalls of the discharge port 110, and the two arc-shaped grooves 211 are arranged opposite each other. A drive shaft 205 is located between the two arc-shaped grooves 211. One end of a material-pushing plate 208 is connected to the drive shaft 205, and the other end of the material-pushing plate 208 contacts the inner wall of the arc-shaped groove 211. Multiple material-pushing plates 208 are provided, arranged circumferentially along the drive shaft 205. The rotating drive shaft 205 drives the material-pushing plates 208 to move in a circular motion, causing the material-pushing plates 208 to carry the seeds to be screened from the arc-shaped grooves 211 onto the screen plate 201 for screening. The continuous rotation of the drive shaft 205 achieves a continuous feeding effect, resulting in more uniform feeding.

[0032] In some embodiments, the impurity collection chamber further includes a breathable filter plate 302; the two ends of the impurity channel 410 are respectively oriented towards the breathable filter plate 302 and the blower 303. By providing the breathable filter plate 302, high pressure is prevented from forming in the impurity channel 410 by the air outlet of the blower 303, which would result in low air velocity and affect the screening efficiency.

[0033] The pore size of the breathable filter plate 302 can be selected by those skilled in the art according to the actual situation, so that the breathable filter plate 302 can be breathable and can block lighter impurities.

[0034] In some embodiments, the impurity collection chamber further includes a second anti-clogging device; the second anti-clogging device is located on the side of the permeable filter plate 302 facing the impurity channel 410. Since the air outlet of the fan 303 will be discharged through the permeable filter plate 302, it will carry impurities to the permeable filter plate 302. By setting the second anti-clogging device, the permeable filter plate 302 is prevented from being blocked by impurities and affecting the air outlet.

[0035] In some embodiments, the impurity collection chamber further includes a drive rod 400; one end of the drive rod 400 is connected to the second anti-clogging device, and the other end of the drive rod 400 is connected to the sieve plate 201 and / or the drive device 206. The drive rod 400 is used to drive the second anti-clogging device to move along the side of the air-permeable filter plate 302. The sieve plate 201 or the drive device 206 drives the drive rod 400 to move, thereby causing the second anti-clogging device to reciprocate and scrape the surface of the air-permeable filter plate 302, preventing impurities from adhering to the air-permeable filter plate 302 under the influence of airflow and causing mesh blockage.

[0036] In some embodiments, the second anti-blocking device includes a U-shaped frame 401, a connecting slide bar 402, and a movable scraper 403, such as Figure 1 and Figure 2As shown, during the reciprocating movement of the sieve plate 201, the transmission rod 400 is pushed and pulled back and forth, causing one end of the transmission rod 400 to pull the U-shaped frame 401 to move back and forth in the first direction. The U-shaped frame 401 then drives the connecting slide rod 402 to move back and forth within the guide shroud 300. The guide shroud 300 is fixed to the outside of the outer shell 500 in a trumpet shape, and the guide shroud 300 constitutes part of the impurity channel 410. The connecting slide rod 402 drives the movable scraper to scrape the surface of the air-permeable filter plate 302 back and forth, preventing impurities from adhering to the air-permeable filter plate 302 under the influence of airflow and causing mesh blockage.

[0037] In some embodiments, the impurity collection chamber further includes an impurity box 301; the opening of the impurity box 301 is connected to the impurity channel 410, and the air-permeable filter plate 302 is located at the connection between the impurity box 301 and the impurity channel 410. The impurity box 301 is used to collect impurities scraped down by the passive scraper 403 or falling freely.

[0038] The impurity box 301 is detachably connected to the flow guide 300, which facilitates timely cleaning of impurities.

[0039] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or technical improvements to the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A seed screening device, characterized by, include: A screening chamber is used to hold seeds to be screened. The bottom of the screening chamber is provided with a discharge port, which faces a first direction. A filter plate is disposed facing the discharge port, the filter plate is inclined relative to the first direction, and the mesh size of the filter plate is smaller than the size of the seed; A blower is installed on the side of the filter plate away from the screening chamber; An impurity collection chamber is used to collect impurities blown out by the blower from the seeds to be screened. The impurity collection chamber includes an impurity channel, one end of which is located on opposite sides of the filter plate in the first direction, along with the blower. A receiving box, located at the lower end of the inclined filter plate, is used to collect the sieved seeds.

2. The seed screening device of claim 1, wherein, The screening bin also includes a guide plate; The guide plate is disposed inside the cavity of the screening chamber. The guide plate is inclined relative to the first direction. The discharge port is disposed at the lower end of the inclined guide plate. The opposite sides of the guide plate form the inner sidewall of the screening chamber and the inner sidewall of the impurity channel, respectively.

3. The seed screening device according to claim 1, characterized in that, The seed screening device also includes a sieve plate and a drive device; The sieve plate is movably connected to the screening chamber, the discharge port and the filter plate are located on opposite sides of the sieve plate, and the aperture of the sieve plate is larger than the size of the seed; The drive end of the drive device is connected to the sieve plate, and the drive device is used to drive the sieve plate to reciprocate along the second direction.

4. The seed screening device of claim 3, wherein, The seed screening device also includes a housing, and the driving device includes a drive shaft and a connecting rod; The screening chamber is located inside the cavity of the outer shell; The connecting rod is disposed on the outside of the housing, and the sieve plate passes through the housing at opposite ends in the second direction and is connected to the connecting rod; One end of the drive shaft is connected to the drive end of the drive device, and the other end of the drive shaft passes through the housing and is connected to the connecting rod.

5. The seed screening device of claim 4, wherein, The portion of the drive shaft located inside the cavity of the housing is provided with a material feeding plate; At least a portion of the feeding plate is located inside the discharge port.

6. The seed screening device of claim 3, wherein, The seed screening device also includes a first anti-blocking device; The first anti-clogging device is located on the side of the sieve plate away from the screening chamber.

7. The seed screening device of claim 3, wherein, The impurity collection chamber also includes a breathable filter plate; The two ends of the impurity channel are respectively oriented towards the air-permeable filter plate and the fan.

8. The seed screening device of claim 7, wherein, The impurity collection chamber also includes a second anti-clogging device; The second anti-clogging device is located on the side of the breathable filter plate facing the impurity channel.

9. The seed screening device of claim 8, wherein, The impurity collection chamber also includes a transmission rod; One end of the transmission rod is connected to the second anti-clogging device, and the other end of the transmission rod is connected to the sieve plate and / or the driving device. The transmission rod is used to drive the second anti-clogging device to move along the side of the air-permeable filter plate.

10. The seed screening device of claim 8, wherein, The impurity collection chamber also includes an impurity box; The opening of the impurity box is connected to the impurity channel, and the air-permeable filter plate is located at the connection between the impurity box and the impurity channel.

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