A lightweight spherical seed screening device

Abstract

This utility model relates to a lightweight spherical seed screening device, belonging to the field of seed screening devices. The device includes a hopper (1), a sliding plate (4), a first support (10), and a second support (6). The hopper (1) is positioned above the sliding plate (4) and connected to the first support (10). The sliding plate (4) has a U-shaped cross-section, with one end hinged to the first support (10) and the other end connected to the second support (6). The height of the second support (6) is adjustable. A seed collection box (5) is provided at the discharge end of the sliding plate (4). An electrostatic impurity removal component is provided on the inner wall of the sliding plate (4). This device utilizes the high vitality and high electrical resistance of seeds, their near-spherical shape, small contact area with the sliding plate (4), and the principle of electrostatic adsorption to achieve effective separation of seeds from impurities. It solves the problem of inconvenient screening caused by the air suspension escape of lightweight seeds or the co-settling of impurities of similar size in traditional air-separation screening equipment.

Description

Technical Field

[0001] This utility model relates to a lightweight spherical seed screening device, belonging to the field of seed screening devices. Background Technology

[0002] In field seed collection, fruits carrying numerous branches and leaves are often collected first, and then the seeds are removed indoors. This inevitably results in the seeds being mixed with impurities such as twigs, broken leaves, fruit peels, and seed coats. Most wild shrub and herb seeds have a near-spherical morphological characteristic, are small in size and light in weight, and their diameter typically ranges from 0.5 to 2 mm. To obtain these pure seeds, meticulous screening is required.

[0003] Currently, existing sorting devices based on shape and aerodynamic characteristics are still insufficient to remove impurities of similar size or weight to seeds. For example, traditional air-separation screening equipment such as flat vibrating screens and single-stage cyclone separators are prone to the escape of lightweight seeds through air suspension or the co-settling of impurities of similar size, affecting screening efficiency and causing inconvenience in drying. Utility Model Content

[0004] The technical problem to be solved by this utility model is that air-separation screening equipment is prone to problems such as the escape of light seeds by air suspension or the co-settling of impurities of similar size, which makes screening inconvenient.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a lightweight spherical seed screening device, including a hopper, a sliding plate, a first support and a second support. The hopper is arranged above the sliding plate and connected to the first support. The sliding plate has a U-shaped cross-section, with one end hinged to the first support and the other end connected to the second support. The height of the second support is adjustable. A seed collection box is provided at the discharge end of the sliding plate. An electrostatic impurity removal component is provided on the inner wall of the sliding plate.

[0006] In the above-mentioned device, the electrostatic impurity removal component is an electrostatic generator. The main body of the electrostatic generator is located below the sliding plate, and the electrode plates of the electrostatic generator are uniformly embedded in the inner wall of the sliding plate and are arranged in parallel.

[0007] The hopper in the above-mentioned device has a hollow structure that is larger at the top and smaller at the bottom, and a switching valve is provided at the discharge end, with a temperature sensor installed on the switching valve.

[0008] The aforementioned device also includes a dust removal device, which includes an electric slide rail and a brush. The cross-section of the brush is adapted to the cross-sectional shape of the slide plate and is located inside the slide plate. The electric slide rail is located on both sides of the opening of the slide plate, and the upper ends of the brush are slidably connected to the electric slide rail.

[0009] In the aforementioned device, the surface of the sliding plate is covered with a polytetrafluoroethylene insulating layer with a thickness of 0.1 to 0.3 mm.

[0010] In the aforementioned device, a vibrator assembly is provided on the outer wall of the sliding plate.

[0011] Furthermore, the vibrator assembly in the above-mentioned device includes a vibrating motor and a shock-absorbing pad, wherein the vibrating motor is connected to the bottom of the sliding plate through the shock-absorbing pad.

[0012] The device also includes a dust collection box, which is located below the seed collection box and is detachably connected to it.

[0013] The seed collection box in the aforementioned device is equipped with a transparent observation window and a capacity scale.

[0014] In the aforementioned device, the second bracket is a worm gear lifting mechanism. The lifting push rod at the top of the second bracket is connected to the bottom of the sliding plate, and the lower end is hinged to the frame through a universal bearing.

[0015] The beneficial effects of this invention are as follows: This device utilizes the high vigor and high electrical impedance of seeds, their near-spherical shape, small contact area with the sliding plate, and the principle of electrostatic adsorption to achieve effective separation of seeds and impurities. Furthermore, relevant parameters can be flexibly adjusted according to the specific conditions of the seeds, improving the screening effect and applicability. The entire screening process is simple to operate, and the various switches are conveniently located for operator control, reducing operational difficulty and labor intensity. The dust removal device allows for timely and easy cleaning of impurities and dust on the sliding plate, ensuring the continuous and stable operation of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a partial cross-sectional structural diagram of the present invention.

[0017] The diagram is labeled as follows: 1 is the hopper, 2 is the switch valve, 3 is the dust removal device, 31 is the electric slide rail, 32 is the brush, 4 is the sliding plate, 5 is the seed collection box, 6 is the second support, 61 is the lifting push rod, 62 is the transmission rod, 63 is the worm gear assembly, 7 is the crossbar, 8 is the electrostatic generator, 9 is the vibrator assembly, 10 is the first support, 11 is the dust collection box, and 12 is the frame. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] like Figure 1 and Figure 2As shown, this utility model discloses a lightweight spherical seed screening device, comprising a hopper 1, a sliding plate 4, a first support 10, and a second support 6. The hopper 1 is positioned above the sliding plate 4 and connected to the first support 10. The sliding plate 4 has a U-shaped cross-section, with one end hinged to the first support 10 and the other end connected to the second support 6, the height of which is adjustable. A seed collection box 5 is provided at the discharge end of the sliding plate 4. An electrostatic impurity removal component is provided on the inner wall of the sliding plate 4. Those skilled in the art will understand that the hopper 1 is used to temporarily store seeds harvested in the field, ensuring continuous screening and feeding. The sliding plate 4 is used to separate seeds from impurities, which is actually accomplished by the electrostatic impurity removal component on the inner wall of the sliding plate 4. Due to the different electrostatic adsorption forces of seeds and impurities, impurities are adsorbed while seeds roll along the inner wall of the sliding plate 4 into the seed collection box 5, thus achieving the screening purpose. To ensure smooth seed rolling, this device preferably has one end of the sliding plate 4 hinged to the first support 10 and the other end connected to the second support 6. The height of the second support 6 is adjustable, meaning the tilt angle of the sliding plate 4 can be adjusted by adjusting the height of the second support 6. The first support 10 should be located at the feeding end of the sliding plate 4, i.e., on the side of the hopper 1, while the second support 6 is located at the discharge end. In practice, a portion of seeds to be screened is poured into the hopper 1, the electrostatic impurity removal component is turned on, the height of the second support 6 is adjusted so that the sliding plate 4 has a certain tilt, and the switch valve 2 of the hopper 1 is opened, allowing the seeds to slide evenly onto the electrostatically charged sliding plate 4. At this time, impurities will be adsorbed onto the sliding plate 4, while the seeds, due to their high vitality, high impedance, and near-spherical shape, have a small contact area with the sliding plate 4 and are therefore subject to less electrostatic adsorption. Due to gravity, the seeds resist the adsorption force and roll off to the tilted side of the sliding plate 4, falling into the seed collection box 5. During operation, the vibration intensity, electrostatic adsorption intensity, and tilt of the sliding plate 4 can be adjusted according to the specific conditions of the seeds, so that the seeds can be separated from impurities and rolled into the seed collection box 5.

[0020] Preferably, the electrostatic removal component in the above-mentioned device is an electrostatic generator 8. The main body of the electrostatic generator 8 is disposed below the sliding plate 4, and the electrode plates of the electrostatic generator 8 are uniformly embedded in the inner wall of the sliding plate 4, and the electrode plates are connected in parallel. Those skilled in the art will understand that this device preferably uses an electrostatic generator 8 as the electrostatic removal component, and in practice, the main body of the electrostatic generator 8 is disposed below the sliding plate 4, while the electrode plates of the electrostatic generator 8 are uniformly embedded in the inner wall of the sliding plate 4, and the electrode plates are connected in parallel. The operation of the electrostatic generator 8 is achieved by controlling the on / off state of the power supply. The electrode plates are uniformly embedded inside the sliding plate 4, using copper electrode plates (0.5-1mm thick), covering 80% of the surface area of ​​the sliding plate 4. The electrode plates are connected in parallel to ensure that the electric field is uniformly distributed at the bottom of the metal sliding plate 4, and the electrodes contact the conductor, causing the sliding plate 4 to generate static electricity. The electrostatic generator 8 can control the adsorption intensity of static electricity by adjusting the voltage. The electrostatic intensity can be adjusted by a knob potentiometer, and the voltage value can be displayed in real time on an LED display screen. The knob potentiometer is set on the base.

[0021] Preferably, the hopper 1 in the above-mentioned device has a hollow structure that is larger at the top and smaller at the bottom, and a switching valve 2 is provided at the discharge end. A temperature sensor is provided on the switching valve 2. Those skilled in the art will understand that, in order to ensure uniform feeding, the hopper 1 of this device preferably has a hollow structure that is larger at the top and smaller at the bottom, and a switching valve 2 is provided at the discharge end. The opening of the hopper 1 is controlled by the switching valve 2. Furthermore, a temperature sensor is provided on the switching valve 2 to automatically adjust the electrostatic strength (formula: V=12+0.3H, where V is voltage / kV and H is humidity / %RH) according to the seed moisture content, so as to avoid adsorption failure caused by electrostatic attenuation in high humidity environment.

[0022] Preferably, the above-mentioned device further includes a dust removal device 3, which includes an electric slide rail 31 and a brush 32. The cross-section of the brush 32 is adapted to the cross-sectional shape of the sliding plate 4 and is disposed inside the sliding plate 4. The electric slide rail 31 is disposed on the two side walls of the opening of the sliding plate 4, and the upper ends of the brush 32 are slidably connected to the electric slide rail 31. Those skilled in the art will understand that, in order to facilitate the timely removal of impurities on the sliding plate 4, this device actually also includes a dust removal device 3, which includes an electric slide rail 31 and a brush 32. The cross-section of the brush 32 is adapted to the cross-sectional shape of the sliding plate 4 and is disposed inside the sliding plate 4. The electric slide rail 31 is disposed on the two side walls of the opening of the sliding plate 4, and the upper ends of the brush 32 are slidably connected to the electric slide rail 31. In practice, the brush 32 is directly driven by the electric slide rail 31 to reciprocate within the sliding plate 4 to remove impurities originally adsorbed on the inner wall of the sliding plate 4. After the seed collection box 5 is removed, the dust removal device 3 is activated to clean the impurities and dust on the sliding plate 4 into the dust collection box 11.

[0023] Preferably, the surface of the sliding plate 4 in the above-mentioned device is covered with a polytetrafluoroethylene (PTFE) insulating layer with a thickness of 0.1 to 0.3 mm. Those skilled in the art will understand that this device preferably covers the surface of the sliding plate 4 with a PTFE insulating layer, more preferably with a thickness of 0.2 mm, to ensure electrostatic adsorption efficiency and avoid the risk of electric shock to operators. Furthermore, an acrylic protective cover can be further provided above the sliding plate 4 to prevent seed escape and to prevent human contact.

[0024] Preferably, a vibrator assembly 9 is provided on the outer wall of the sliding plate 4 in the above-described device. Those skilled in the art will understand that, in order to ensure that the seeds continue to roll on the sliding plate 4, it is actually preferable that the vibrator assembly 9 is provided on the outer wall of the sliding plate 4 in this device.

[0025] Preferably, the vibrator assembly 9 in the above-mentioned device includes a vibrating motor and a shock-absorbing pad, and the vibrating motor is connected to the bottom of the sliding plate 4 through the shock-absorbing pad. Those skilled in the art will understand that the vibrator assembly 9 preferably includes a vibrating motor and a shock-absorbing pad, and the vibrating motor can be an eccentric wheel type vibrating motor (power 50-100W, speed adjustable 3000rpm), installed at the center of the bottom of the sliding plate 4, and rigidly connected to the sliding plate 4 by bolts. A 5mm thick silicone shock-absorbing pad is provided between the vibrating motor base and the sliding plate 4 to reduce noise and impact on the frame 12, and the vibration intensity of the vibrating motor is adjustable.

[0026] Preferably, the above-mentioned device further includes a dust collection box 11, which is disposed below the seed collection box 5 and is detachably connected to it. Those skilled in the art will understand that, for the convenience of collecting impurities, it is actually preferable to arrange the dust collection box 11 below the seed collection box 5. Furthermore, to facilitate monitoring of the amount of impurities collected, the dust collection box 11 can be equipped with a transparent observation window and a capacity scale.

[0027] Preferably, the seed collection box 5 in the above-described device is equipped with a transparent observation window and a volume scale. Those skilled in the art will understand that, in order to facilitate monitoring of the amount of impurities collected, this device preferably equips the seed collection box 5 with a transparent observation window and a volume scale.

[0028] Preferably, in the above-described device, the second support 6 is a worm gear lifting mechanism. The lifting push rod 61 at the upper part of the second support 6 is connected to the bottom of the sliding plate 4, and the lower end is hinged to the frame 12 through a universal bearing. Those skilled in the art will understand that, in this device, the second support 6 is preferably a worm gear lifting mechanism. In practice, the worm gear assembly 63 of the second support 6 is driven by a stepper motor (accuracy ±0.5°) to drive the lifting. The lifting push rod 61 at the upper part of the second support 6 is connected to the bottom of the sliding plate 4, and the lower end is hinged to the frame 12 through a universal bearing, achieving an tilt angle adjustment from 0 to 30°, allowing the sliding plate 4 to tilt towards the discharge port. The frame 12 is a structural component used to connect the first support 10 and the second support 6, ensuring the overall stability of the support. To ensure the stability of the height adjustment of the sliding plate 4, the worm gear lifting mechanism can be installed on both sides of the discharge end of the sliding plate 4. The two worm gear lifting mechanisms can be synchronously raised and lowered via the transmission rod 62, with the upper ends of both mechanisms acting directly on the crossbar 7. The crossbar 7 is hinged to the sliding plate 4. To accommodate vibration displacement, a space for movement or a rubber pad should be provided at the connection between the first support 10, the second support 6, and the sliding plate 4.

[0029] Operating procedures Operating procedure for this device: 1. Preparation stage: Pour a portion of lightweight spherical seeds to be screened into hopper 1. Hopper 1 is used to store the seeds to be screened, providing a stable seed source for the subsequent screening process.

[0030] 2. Parameter adjustment stage: (1) Turn on the electrostatic adjustment switch and apply static electricity to the sliding plate 4 through the electrostatic impurity removal component. The function of static electricity is to adsorb impurities in the seeds. Since the seeds have high vitality and high resistance, they are less susceptible to electrostatic adsorption, while impurities are more easily adsorbed onto the sliding plate 4 by static electricity.

[0031] (2) Adjust the height of the second support 6 to adjust the sliding plate 4 to a certain tilt. A suitable tilt allows the seeds to roll smoothly to the tilted side of the sliding plate 4 under the action of gravity, while ensuring that impurities have enough time to be adsorbed on the sliding plate 4.

[0032] 3. Screening stage: (1) Open the switch valve 2 of hopper 1 to allow the seeds to flow out of hopper 1.

[0033] (2) Turn on the vibration switch and start the vibrator assembly 9. The purpose of vibration is to make the seeds slide evenly onto the electrostatic sliding plate 4, avoid seed accumulation, ensure that each seed can fully contact the sliding plate 4, and improve the screening effect.

[0034] When the seeds slide onto the electrostatically charged sliding plate 4, impurities will be adsorbed onto the sliding plate 4. Due to their high vitality, high impedance, and near-spherical shape, the seeds have a small contact area with the sliding plate 4 and are subject to less electrostatic adsorption. They will resist the adsorption force due to gravity and roll off to the side of the sliding plate 4, eventually falling into the seed collection box 5.

[0035] (3) Cleaning stage: After removing the seed collection box 5, start the dust removal device 3. The brush 32 is used to clean the impurities and dust adsorbed on the sliding plate 4, so that they fall into the dust collection box 11 for centralized treatment, and also to prepare for the next screening.

[0036] 4. Flexible adjustment mechanism Throughout the screening process, operators can flexibly adjust the vibration intensity, electrostatic adsorption intensity, and the inclination of the sliding plate 4 based on the specific conditions of the seeds, such as seed size, moisture content, and impurity content. This ensures that the seeds are successfully separated from impurities and rolled into the seed collection box 5, improving the applicability and screening effect of the device.

Claims

1. A lightweight spherical seed sorting device, characterized in that: It includes a hopper (1), a sliding plate (4), a first support (10) and a second support (6). The hopper (1) is located above the sliding plate (4) and connected to the first support (10). The sliding plate (4) has a U-shaped cross-section, with one end hinged to the first support (10) and the other end connected to the second support (6). The height of the second support (6) is adjustable. A seed collection box (5) is provided at the discharge end of the sliding plate (4). An electrostatic impurity removal component is provided on the inner wall of the sliding plate (4).

2. The lightweight spherical seed screening device according to claim 1, characterized in that: The electrostatic cleaning component is an electrostatic generator (8). The main body of the electrostatic generator (8) is located below the sliding plate (4). The electrode plates of the electrostatic generator (8) are evenly embedded in the inner wall of the sliding plate (4) and are arranged in parallel.

3. The lightweight spherical seed screening device according to claim 1, characterized in that: The hopper (1) has a hollow structure that is larger at the top and smaller at the bottom, and a switch valve (2) is provided at the discharge end. A temperature sensor is provided on the switch valve (2).

4. The lightweight spherical seed screening device according to claim 1, characterized in that: It also includes a dust removal device (3), which includes an electric slide rail (31) and a brush (32). The cross-section of the brush (32) is adapted to the cross-sectional shape of the slide plate (4) and is located inside the slide plate (4). The electric slide rail (31) is located on both sides of the opening of the slide plate (4), and the upper ends of the brush (32) are slidably connected to the electric slide rail (31).

5. The lightweight spherical seed screening device according to claim 1, characterized in that: The surface of the sliding plate (4) is covered with a polytetrafluoroethylene insulating layer with a thickness of 0.1 to 0.3 mm.

6. The lightweight spherical seed screening device according to claim 1, characterized in that: A vibrator assembly (9) is provided on the outer wall of the sliding plate (4).

7. The lightweight spherical seed screening device according to claim 6, characterized in that: The vibrator assembly (9) includes a vibrating motor and a damping pad, wherein the vibrating motor is connected to the bottom of the sliding plate (4) via the damping pad.

8. The lightweight spherical seed screening device according to claim 1, characterized in that: It also includes a dust collection box (11), which is located below the seed collection box (5) and is detachably connected to the dust collection box (11).

9. The lightweight spherical seed screening device according to claim 1, characterized in that: The seed collection box (5) is equipped with a transparent observation window and a capacity scale.

10. A lightweight spherical seed screening device according to claim 1, characterized in that: The second bracket (6) is a worm gear lifting mechanism. The lifting push rod (61) on the upper part of the second bracket (6) is connected to the bottom of the sliding plate (4), and the lower end is hinged to the frame (12) through a universal bearing.

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