A multi-stage screening device for water spinach seeds

Abstract

The utility model relates to seed screening device technical field discloses a hollow vegetable seed multistage screening device, including device main part, device main part one side fixed setting has drive motor, drive motor output fixedly installed has reciprocating screw rod, reciprocating screw rod outside thread coupling has removal box, removal box front and back both ends all rotationally arranged four gear, a plurality of gear two two opposite one end all fixedly installed has cam, removal box inside slide has two screening frame, two screening frame front and back both ends all fixedly installed have two fixed blocks, a plurality of fixed blocks lower end all fixedly installed have spring. In the utility model, through the horizontal reciprocating motion of removal box and screening frame perpendicular vibration, make the hollow vegetable seed in the screen surface fully loose, improve the dispersibility and sieve rate, and, cam periodicity pushes the screening frame effectively prevents sieve hole blockage, ensures long time stable operation, reduces the frequency of shutdown cleaning.

Description

Technical Field

[0001] This utility model relates to the technical field of seed screening devices, and in particular to a multi-stage screening device for water spinach seeds. Background Technology

[0002] Water spinach, scientifically known as Ipomoea aquatica, is an annual or perennial herbaceous plant belonging to the Convolvulaceae family and the Ipomoea genus. It originated in southern my country. Its tender shoots and leaves can be eaten raw in salads, stir-fried, or used in soups. It is rich in vitamins, minerals, and calcium, and also has medicinal value such as clearing heat and detoxifying. It is now a fast-growing leafy green vegetable widely cultivated in both northern and southern China. In the water spinach seed processing stage, it is usually necessary to first screen the seeds to remove small, unripe seeds and impurities such as debris, thereby improving the quality of the seeds and increasing the success rate of subsequent breeding.

[0003] Existing water spinach seed screening devices use a single vibration mode, which results in uneven distribution of seeds on the screen surface, easily leading to accumulation or segregation, affecting the screening effect. Moreover, most of them are single-layer screens, which makes it easy for seeds to accumulate and become stuck on the screen surface, not only reducing screening efficiency, but also causing some small-diameter seeds to fail to separate effectively due to insufficient contact between the seeds and the screen.

[0004] Therefore, those skilled in the art have provided a multi-stage screening device for water spinach seeds to solve the problems mentioned in the background art. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a multi-stage screening device for water spinach seeds. Through the horizontal reciprocating motion of the moving box and the vertical vibration of the screening frame, the water spinach seeds are fully loosened on the screen surface, improving dispersion and screening rate. Furthermore, the periodic push of the cam on the screening frame effectively prevents screen hole clogging, ensuring stable operation over a long period of time and reducing the frequency of downtime for cleaning.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A multi-stage screening device for water spinach seeds includes a main body, a drive motor fixedly mounted on one side of the main body, a reciprocating screw fixedly mounted on the output end of the drive motor, and a movable box externally threaded onto the reciprocating screw. The movable box has four gears rotatably mounted at both ends. Each of the gears has a cam fixedly mounted at one end in pairs. Two screening frames are slidably mounted inside the movable box. Two fixing blocks are fixedly mounted at both ends of the two screening frames. Springs are fixedly mounted at the lower ends of the fixing blocks. Two racks are fixedly mounted at both ends of the main body of the device. Four sliding grooves are opened at both ends of the movable box.

[0007] Furthermore, the external parts of the multiple gears are respectively meshed with the upper ends of the multiple racks, and the external parts of the multiple cams are respectively rotatably disposed at the front and rear ends inside the movable box.

[0008] Furthermore, the external ends of the plurality of cams are respectively disposed at the lower ends of the front and rear ends of the two screening frames, and the lower ends of the plurality of springs are respectively fixedly disposed at the front and rear ends of the interior of the movable box.

[0009] Furthermore, the fixed blocks are slidably disposed outside the multiple sliding grooves, the movable box is slidably disposed outside the device body, and the reciprocating screw is rotatably disposed on the side away from the drive motor inside the device body near the lower end.

[0010] Furthermore, a sliding door is slidably provided on one side of the mobile box, and both screening frames are slidably provided on one side of the sliding door near the drive motor. A cabinet door is hinged to one side of the main body of the device.

[0011] Furthermore, a feed inlet is provided at the upper end of the main body of the device, and a fan is fixedly installed on one side of the upper end inside the main body of the device.

[0012] Furthermore, a collection frame is slidably disposed on the other side of the upper part of the main body of the device, and a breathable net is fixedly disposed on one side of the collection frame.

[0013] This utility model has the following beneficial effects: This utility model proposes a multi-stage screening device for water spinach seeds. In use, a drive motor drives a reciprocating screw to rotate, causing the moving box to move laterally back and forth inside the main body of the device. The gears at both ends of the moving box rotate synchronously with the lateral movement of the moving box, thereby driving the cam connected to it to rotate. When the cam rotates, it periodically lifts the bottom of the screening frame, causing the screening frame and the fixed block to vibrate up and down inside the moving box. The lateral reciprocating motion of the moving box and the up and down vibration of the screening frame form a compound motion, which makes the seeds fully dispersed on the screen surface and effectively prevents the screen from clogging. At the same time, it improves the screening efficiency of the seeds and ultimately realizes multi-stage screening of water spinach seeds of different specifications. Attached Figure Description

[0014] Figure 1 This is a frontal axonometric view of the entire utility model; Figure 2 This is a rear-view axonometric schematic diagram of the entire utility model; Figure 3 This is a cross-sectional isometric view of the entire utility model. Figure 4 This is a bottom-view axonometric schematic diagram of the present invention, close to the movable box; Figure 5 This is a cross-sectional isometric view of the present invention near the movable box; Figure 6 This is a partial orthographic isometric view of the present invention near the filter box.

[0015] Legend: 1. Main body of the device; 2. Drive motor; 3. Feed inlet; 4. Collection frame; 5. Ventilation mesh; 6. Fan; 7. Cabinet door; 8. Reciprocating screw; 9. Moving box; 10. Rack; 11. Gear; 12. Screening frame; 13. Sliding door; 14. Fixing block; 15. Spring; 16. Cam; 17. Slide groove. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Reference Figures 1-4 One embodiment provided by this utility model: A multi-stage screening device for water spinach seeds includes a device body 1, a drive motor 2 fixedly installed on one side of the device body 1, a reciprocating screw 8 fixedly installed at the output end of the drive motor 2, and a movable box 9 externally threaded to the reciprocating screw 8. The movable box 9 has four gears 11 rotatably arranged at both the front and rear ends. Each pair of gears 11 is fixedly provided with a cam 16 at one end. The movable box 9 has two screening frames 12 slidably arranged inside. Each screening frame 12 has two fixed blocks 14 fixedly arranged at both the front and rear ends. Each fixed block 14 has a spring 15 fixedly arranged at the lower end. The main body 1 of the device has two racks 10 fixedly arranged at both the front and rear ends. The movable box 9 has four sliding grooves 17 opened at both the front and rear ends. Multiple gears 11 are externally meshed with the upper ends of multiple racks 10 respectively. Multiple cams 16 are externally rotatably disposed at the front and rear ends of the moving box 9. Multiple cams 16 are externally disposed at the lower ends of the front and rear ends of the two screening frames 12 respectively. Multiple springs 15 are externally fixedly disposed at the front and rear ends of the moving box 9 respectively. Multiple fixing blocks 14 are externally slidably disposed inside multiple slide grooves 17. The moving box 9 is externally slidably disposed inside the main body 1 of the device. The reciprocating screw 8 is rotatably disposed at the lower end of one side of the main body 1 of the device, away from the drive motor 2. A sliding door 13 is slidably installed on one side of the mobile box 9. Two screening boxes 12 are slidably installed on one side of the sliding door 13 near the drive motor 2. A cabinet door 7 is hinged on one side of the main body 1. A feed inlet 3 is provided at the upper end of the main body 1. A fan 6 is fixedly installed on one side of the upper end inside the main body 1. A collection box 4 is slidably installed on the other side of the upper end inside the main body 1. A breathable net 5 is fixedly installed on one side of the collection box 4. Specifically, when using this device, the operator first places the device stably in the predetermined working position and connects the power supply. Then, the fan 6 and drive motor 2 are started through the control panel at the front of the main body 1. After the device is running stably, the water spinach seeds to be screened are evenly fed into the feed port 3 at the top of the main body 1. At this time, the fan 6 located at the upper part of the device will generate airflow and blow the seeds falling from the feed inlet 3 horizontally. Because the seeds are shriveled, insect-damaged or poorly developed, they are lighter and are carried by the airflow to the side of the device under the action of the wind. After passing through the ventilation net 5, they fall into the pull-out collection frame 4. At the same time, leaf debris, dust and some lighter impurities will also be separated and collected along with the airflow. The purified airflow is discharged through the ventilation net 5. The ventilation net 5 can intercept seeds and impurities, and allow airflow to pass through, which can effectively prevent dust from overflowing and keep the operating environment clean and hygienic. After being winnowed, the plump seeds will fall vertically due to their own weight and land in the uppermost screening frame 12 inside the moving box 9. Both screening frames 12 are fitted with screens of different apertures using a snap-fit ​​method, which can be flexibly replaced according to actual needs to adapt to different batches of seeds. The screen aperture of the upper screening frame 12 is larger than that of the lower screening frame 12. The upper screen is used to remove large particles of impurities and perform preliminary grading, while the lower screen further filters out high-quality seeds that meet the particle size standard. When the drive motor 2 is running, its output shaft drives the reciprocating screw 8 to rotate. Since the reciprocating screw 8 is threadedly connected to the moving box 9, it pushes the moving box 9 to perform horizontal reciprocating linear motion within the main body 1 of the device. During this process, the gears 11 at the front and rear ends of the moving box 9 will always be engaged with the rack 10 fixed on the inner wall of the main body 1 of the device, so that the gears 11 rotate synchronously with the translation of the moving box 9. Each gear 11 is coaxially connected to the cam 16, and the cam 16 will rotate with the rotation of the gear 11 and periodically lift the bottom of the screening frame 12 below. Under the intermittent lifting action of the cam 16, the screening frame 12 will slide up and down inside the moving box 9. At the same time, it will slide and guide along the inside of the slide groove 17 through the fixed block 14, and squeeze and stretch the spring 15, so that the screening frame 12 will vibrate up and down inside the moving box 9. The combination of the lateral reciprocating motion of the moving box 9 and the vertical vibration of the screening frame 12 makes the seeds roll and disperse continuously in the screen, and fully contact the screen holes, thereby improving the screening efficiency and avoiding clogging and accumulation. During the multi-stage sieving process, seeds smaller than the mesh size of the upper sieve fall into the lower sieving frame 12 for further grading. Finally, qualified seeds pass through the bottom sieve and fall into the bottom space of the moving box 9, while substandard small and damaged seeds remain on the corresponding sieve layer. After sieving, the operator can open the cabinet door 7 on one side of the main body 1 of the device, and then slide open the sliding door 13 on the side of the moving box 9 to release the restriction of the sliding door 13 on the sieving frame 12. Then, each sieving frame 12 can be easily pulled out and seeds of different grades can be taken out for classification and collection. It should be noted that the fan 6 is equipped with a knob-type wind speed adjustment mechanism, which can adjust the wind speed according to the fullness of the water spinach seeds. After the wind speed is calibrated through pre-experiment, it can accurately separate shriveled seeds from light impurities, avoiding the loss of qualified seeds. This is a mature and publicly available technology. Therefore, its specific structure and working principle will not be described in detail in this article. The drive motor 2 is a servo motor. Both the fan 6 and the drive motor 2 are controlled by external control equipment. They are both existing devices or equipment, or devices or equipment that can be implemented by existing technology. They are all started and controlled by external control equipment. Their functions, specific components and principles are clear to those skilled in the art, so they will not be described in detail. The bottom of the mobile box 9 is equipped with a soft rubber pad. After qualified seeds pass through the screen of the lower screening frame 12, they fall onto the soft rubber pad, which can prevent the seeds from being damaged by impact and facilitate the collection of qualified seeds. The meshing surface of the rack 10 is coated with a polytetrafluoroethylene lubricating coating, which can effectively reduce the coefficient of friction and extend the service life. During subsequent maintenance, lubricant can be added to the upper end of the rack 10 to reduce the friction between the gear 11 and the rack 10. The end of the reciprocating screw 8 away from the drive motor 2 is rotatably set inside the device body 1 on one side near the lower end through a deep groove ball bearing. The outer ring of the bearing is interference-fitted with the device body 1, and the inner ring is interference-fitted with the reciprocating screw 8. The springs 15 are all made of stainless steel, which has good fatigue resistance and can prevent rust from affecting the elasticity. During subsequent maintenance, the springs 15 can be replaced. The sliding door 13 has a built-in elastic metal pin near its edge. The moving box 9 has a pin hole corresponding to the closed position of the sliding door 13. When the sliding door 13 is pushed to the closed state along the side slide of the moving box 9, the elastic pin pops out under the action of elasticity and inserts into the pin hole, locking the sliding door 13 and preventing the sliding door 13 from shifting when the moving box 9 moves laterally or when the screening frame 12 vibrates. The inner edge of the cabinet door 7 is provided with an elastic plastic buckle. The main body 1 of the device has a groove corresponding to the buckle position. When the cabinet door 7 is closed around the hinge axis, the elastic buckle is squeezed and embedded into the groove to achieve automatic locking and prevent the cabinet door 7 from loosening or seeds or impurities from leaking out due to device vibration during the screening process. The above locking principle is a mature and publicly available technology in the prior art. Therefore, its specific structure and working principle will not be described in detail in this article. All standard parts used in this application can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt mature existing technologies such as bolts, rivets, welding and other conventional methods. Mechanical parts, components and equipment adopt conventional models in the prior art, and circuit connections adopt conventional connection methods in the prior art. Therefore, they will not be described in detail. All contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0018] Working principle: When in use, the water spinach seeds to be screened are put into the feed port 3 at the top of the main body 1. The fan 6 at the top of the main body 1 will generate airflow and blow it towards the seeds. The shriveled seeds and some lighter impurities are blown into the collection frame 4 by the airflow. The airflow will be discharged through the ventilation net 5. The shriveled seeds and some lighter impurities will be collected into the collection frame 4. The remaining seeds will fall into the screening box 12 at the top of the moving box 9. The screening box 12 is equipped with screens of different aperture sizes. When the drive motor 2 is running, its output end will drive the reciprocating screw 8 to rotate. The reciprocating screw 8 will drive the moving box 9 to move back and forth horizontally along the inside of the main body 1 of the device. During the reciprocating motion, the moving box 9 will drive the gear 11 to rotate synchronously. The rotation of the gear 11 will drive the cam 16 connected to it to rotate synchronously. When the cam 16 rotates, its protruding part will periodically push up the bottom of the front and rear ends of the screening frame 12, so that the screening frame 12 slides up and down inside the moving box 9. When the screening frame 12 slides inside the moving box 9, it will synchronously drive the fixed blocks 14 at its front and rear ends to move, so that the fixed blocks 14 slide inside the slide groove 17 and stretch and compress the spring 15 connected to it. The lateral reciprocating motion of the moving box 9 and the up and down sliding of the screening frame 12 will make the water spinach seeds fully dispersed and tumble inside the screening frame 12, so that seeds smaller than the mesh size fall into another screening frame 12. After screening, seeds with different aperture sizes will be in different positions. At this time, the operator opens the cabinet door 7 on one side of the main body 1 of the device, and then slides the sliding door 13 on one side of the moving box 9 to gradually release it from contact with the two screening boxes 12. Then, the screened seeds can be taken out.

[0019] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-stage screening device for water spinach seeds, comprising a main body (1), characterized in that: A drive motor (2) is fixedly installed on one side of the main body (1) of the device. A reciprocating screw (8) is fixedly installed at the output end of the drive motor (2). A movable box (9) is threadedly connected to the reciprocating screw (8). The movable box (9) is equipped with four gears (11) at both the front and rear ends. Each of the gears (11) is fixed with a cam (16) at one end opposite to each other. The movable box (9) has two screening frames (12) that slide inside. Each of the two screening frames (12) has two fixed blocks (14) at both the front and rear ends. Each of the fixed blocks (14) has a spring (15) fixed at the lower end. The main body (1) of the device has two racks (10) fixed at both the front and rear ends. The movable box (9) has four sliding grooves (17) at both the front and rear ends.

2. The multi-stage screening device for water spinach seeds according to claim 1, characterized in that: The external parts of the multiple gears (11) are respectively meshed with the upper ends of the multiple racks (10), and the external parts of the multiple cams (16) are respectively rotatably arranged at the front and rear ends inside the movable box (9).

3. The multi-stage screening device for water spinach seeds according to claim 1, characterized in that: Multiple cams (16) are respectively set at the lower ends of the front and rear ends of the two screening boxes (12), and multiple springs (15) are respectively fixed at the lower ends of the front and rear ends of the movable box (9).

4. The multi-stage screening device for water spinach seeds according to claim 1, characterized in that: Multiple fixed blocks (14) are slidably disposed inside multiple sliding grooves (17) respectively. The movable box (9) is slidably disposed inside the main body (1) of the device. The reciprocating screw (8) is rotatably disposed on the side away from the drive motor (2) inside the main body (1) of the device near the lower end.

5. The multi-stage screening device for water spinach seeds according to claim 1, characterized in that: The movable box (9) is slidably provided with a sliding door (13) on one side, and the two screening boxes (12) are slidably provided on one side of the sliding door (13) near the drive motor (2). The main body of the device (1) is hinged with a cabinet door (7) on one side.

6. The multi-stage screening device for water spinach seeds according to claim 1, characterized in that: The upper end of the main body (1) of the device is provided with a feed inlet (3), and a fan (6) is fixedly installed on one side of the upper end inside the main body (1).

7. The multi-stage screening device for water spinach seeds according to claim 6, characterized in that: A collection frame (4) is slidably provided on the other side of the upper part of the main body (1) of the device, and a breathable net (5) is fixedly provided on one side of the collection frame (4).

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