Screening device for crop seed production

Abstract

The utility model discloses a screening device for crop seed production, which belongs to the field of screening devices and comprises a support and a screening box, damping springs are fixedly connected between the support and the screening box, a vibration motor is fixedly connected to the bottom surface of the screening box, a screen is fixedly connected to the inside of the screening box, and a discharge port is further formed in the left side of the bottom surface of the screening box. A sealing cover is fixedly connected to the top face of the screening box, a feeding port is formed in the top face of the sealing cover, an anti-blocking mechanism is arranged, a screen can be cleaned in real time in the crop seed screening process, the problem of screen blocking can be solved without shutdown, efficient and continuous screening work in the crop seed production process is achieved, and the screening efficiency is improved. The crop seed screening device is simple in structure and convenient to operate, the screening net can be automatically cleaned, the manual cleaning frequency is greatly reduced, the screening net does not need to be manually and frequently detached for cleaning, the labor cost is reduced, the labor intensity of operators is relieved, and the screening effect and screening efficiency of crop seeds and the working efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of screening devices, and in particular to a screening device for crop seed production. Background Technology

[0002] Crop seeds refer to various plant propagules used in agricultural production. They are reproductive materials with specific genetic characteristics, formed through natural evolution or artificial selection. They typically consist of three parts: the seed coat, the embryo, and the endosperm. The seed coat provides protection, the embryo is the rudimentary form of the new plant, and the endosperm stores nutrients for use in the early stages of germination. As the foundation of agricultural production, seeds carry the characteristics of a variety, and their quality directly affects the crop's growth cycle, yield, and quality. For example, hybrid rice seeds, through scientific breeding, possess both high yield and lodging resistance; while vegetable seeds induced by space mutation may produce even better traits. From sowing to harvest, seeds are both the starting point of the agricultural industry chain and a core element in ensuring food security.

[0003] In existing technologies, screening devices are used in crop seed production primarily because seeds must meet strict physical property standards before processing, storage, and sowing. Screening devices can effectively remove mixed straw, dust, broken seeds, and diseased / pest particles through screens of different apertures, ensuring seed purity. Simultaneously, they can grade seeds according to size and shape, discarding excessively small or damaged seeds and retaining plump, healthy grains, thereby improving germination rate, uniform seedling emergence in the field, and final yield.

[0004] However, existing crop seed screening devices still have significant limitations in practical applications. Some crop seeds, such as peanut seeds and sunflower seeds, have irregular shapes. During the screening process, these irregularly shaped seeds are prone to intertwining and getting stuck, especially at the mesh openings of the screen, causing screen blockage. Once the screen is blocked, it severely affects the screening effect and efficiency, making the screening process impossible.

[0005] To solve the problem of screen clogging, timely cleaning of the screens is necessary. However, existing screening devices generally lack effective cleaning methods, and most can only be cleaned manually. In practice, the screening device must first be stopped, then the sealing cover removed, and finally the screen disassembled from the screening box. The entire cleaning process is cumbersome, consuming a lot of manpower and time, and also significantly reducing the working efficiency of the screening device, failing to meet the actual needs of efficient and continuous operation in crop seed production. Utility Model Content

[0006] The main purpose of this invention is to provide a screening device for crop seed production, which can effectively solve the problems in the background art.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A screening device for crop seed production includes a support frame and a screening box. A shock-absorbing spring is fixedly connected between the support frame and the screening box. A vibration motor is fixedly connected to the bottom surface of the screening box. A screen is fixedly connected inside the screening box, and a discharge port is provided on the left side of the bottom surface of the screening box. A sealing cover is fixedly connected to the top surface of the screening box, and a feed port is provided on the top surface of the sealing cover. An anti-clogging mechanism is provided below the screen. The anti-clogging mechanism includes a lifting plate, a guide rod, an electric push rod, and a movable plate. The lifting plate is movably connected to a guide rod inside the screening box through a guide hole on its top surface, and a guide rod is fixedly connected to the top surface of the lifting plate. The electric push rod is fixedly connected to a mounting base on the side wall of the screening box, and the movable plate is fixedly connected to the output end of the electric push rod through a connecting block on the side wall. The lifting plate is also movably connected to the movable plate through a roller sleeved on the outside of a lifting shaft on one side.

[0009] Preferably, guide rods are fixedly installed at the four corners of the inner bottom surface of the screening box.

[0010] Preferably, a vertical opening is provided on the right side wall of the screening box.

[0011] Preferably, a horizontal plate is fixedly installed on the right side wall of the screening box at the top of the vertical opening, and a T-shaped groove is opened on the bottom surface of the horizontal plate. A mounting base is also fixedly installed on the right side wall of the screening box.

[0012] Preferably, the electric actuator is fixedly installed on the side wall of the mounting base, a connecting block is fixedly installed on the side wall of the movable plate, and the connecting block is fixedly installed together with the output end of the electric actuator. A T-shaped slide bar is fixedly installed on the top surface of the movable plate, and the T-shaped slide bar is movably installed in the T-shaped slide groove. An inclined groove is also provided on the side wall of the movable plate.

[0013] Preferably, the top surface of the lifting plate has guide holes at the four corners and is movably mounted with guide rods through the guide holes. Several guide rods are also fixedly mounted on the top surface of the lifting plate. A lifting shaft is fixedly mounted on the right side wall of the lifting plate and passes through the vertical opening. A rotating hole is opened on the side wall of the roller and is movably fitted onto the outside of the lifting shaft through the rotating hole. A baffle is fixedly mounted on the other end of the lifting shaft. The roller is also movably mounted in the inclined groove.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] In this invention, the anti-clogging mechanism, when the screen becomes clogged and needs cleaning, activates the electric actuator to drive the output end, which in turn moves the movable plate to the right via the connecting block. This causes the rollers to roll from low to high along the inclined groove on the side wall of the movable plate. During this rolling motion, the rollers rotate around the lifting shaft through the rotating hole, causing the lifting shaft to move upwards within the vertical opening. Simultaneously, the lifting shaft drives the lifting plate, causing it to move upwards synchronously along the guide rod through the guide hole. The guide rod on the top surface of the lifting plate then inserts into the mesh of the screen. It guides and ejects seeds stuck in the mesh, effectively preventing screen blockage. This allows for real-time cleaning of the screen during the screening process, eliminating the need to stop the machine to address screen blockage. This enables efficient and continuous screening of crop seeds and automatically cleans the screen, greatly reducing the frequency of manual cleaning. It eliminates the need for frequent disassembly and cleaning of the screen, lowering labor costs and reducing the workload of operators. This, in turn, improves the screening effect, efficiency, and overall work efficiency of crop seeds. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a cross-sectional schematic diagram of the screening box of this utility model;

[0018] Figure 3 This is a top view of the screening box of this utility model.

[0019] Figure 4 This is an enlarged right-side view of the screening box of this utility model.

[0020] Figure 5 This is a structural breakdown diagram of the anti-clogging mechanism of this utility model;

[0021] Figure 6 For the present utility model Figure 5 An enlarged schematic diagram of the structure at point A.

[0022] In the diagram: 1. Support frame; 2. Screening box; 3. Shock-absorbing spring; 4. Vibration motor; 5. Screen; 6. Discharge port; 7. Sealing cover; 8. Feed inlet; 9. Anti-clogging mechanism; 10. Guide rod; 11. Vertical opening; 12. Horizontal plate; 13. T-shaped chute; 14. Mounting base; 15. Lifting plate; 16. Guide hole; 17. Guide rod; 18. Lifting shaft; 19. Roller; 20. Rotating hole; 21. Baffle plate; 22. Electric actuator; 23. Movable plate; 24. Connecting block; 25. T-shaped slide bar; 26. Inclined chute. Detailed Implementation

[0023] 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.

[0024] like Figure 1 - Figure 6 As shown, a screening device for crop seed production includes a support 1 and a screening box 2. A shock-absorbing spring 3 is fixedly connected between the support 1 and the screening box 2. A vibrating motor 4 is fixedly connected to the bottom surface of the screening box 2. A screen 5 is fixedly connected inside the screening box 2. A discharge port 6 is provided on the left side of the bottom surface of the screening box 2. A sealing cover 7 is fixedly connected to the top surface of the screening box 2. A feed inlet 8 is provided on the top surface of the sealing cover 7. An anti-clogging mechanism 9 is provided below the screen 5. The anti-clogging mechanism 9 includes a lifting plate. 15. A guide rod 17, an electric push rod 22, and a movable plate 23. The lifting plate 15 is movably connected to the guide rod 10 inside the screening box 2 through the guide hole 16 on the top surface, and the guide rod 17 is fixedly connected to the top surface of the lifting plate 15. The electric push rod 22 is fixedly connected to the mounting seat 14 on the side wall of the screening box 2, and the movable plate 23 is fixedly connected to the output end of the electric push rod 22 through the connecting block 24 on the side wall. The lifting plate 15 is also movably connected to the movable plate 23 through the roller 19 sleeved on the outside of the lifting shaft 18 on one side.

[0025] like Figure 3 As shown, guide rods 10 are fixedly installed at the four corners of the bottom surface of the screening box 2. The guide rods 10 ensure the stability and accuracy of the lifting plate 15 during the lifting process, so that it will not deviate or shake. This ensures that the guide rods 17 on the top surface of the lifting plate 15 can accurately extend into the mesh of the screen 5 for cleaning, thus improving the working reliability of the anti-clogging mechanism.

[0026] like Figure 4 As shown, a vertical opening 11 is provided on the right side wall of the screening box 2. The vertical opening 11 provides a channel for the lifting shaft 18 to extend and move. When the lifting shaft 18 moves up and down in the vertical opening 11, it can drive the lifting plate 15 to move synchronously.

[0027] like Figure 4 As shown, a horizontal plate 12 is fixedly installed on the right side wall of the screening box 2 and at the top of the vertical opening 11. A T-shaped groove 13 is provided on the bottom surface of the horizontal plate 12. The T-shaped groove 13 is used to cooperate with the T-shaped slide bar 25 to achieve sliding operation. A mounting base 14 is also fixedly installed on the right side wall of the screening box 2. The mounting base 14 is used to install and support the electric push rod 22.

[0028] like Figure 5 and Figure 6As shown, the electric push rod 22 is fixedly installed on the side wall of the mounting base 14. A connecting block 24 is fixedly installed on the side wall of the movable plate 23, and the connecting block 24 is fixedly installed together with the output end of the electric push rod 22. A T-shaped slide bar 25 is fixedly installed on the top surface of the movable plate 23, and the T-shaped slide bar 25 is movably installed in the T-shaped slide groove 13. An inclined groove 26 is also provided on the side wall of the movable plate 23. When the electric push rod 22 is energized, its output end will produce a telescopic action. Since the electric push rod 22 is fixedly installed on the screening box 2 through the mounting base 14, and its output end is fixedly connected to the connecting block 24 on the side wall of the movable plate 23, the telescopic action of the electric push rod 22 will drive the movable plate 23 to slide horizontally along the T-shaped slide groove 13 through the T-shaped slide bar 25. The inclined groove 26 on the side wall of the movable plate 23 is used to cooperate with the roller 19 on the lifting shaft 18 to convert the horizontal movement of the movable plate 23 into the vertical movement of the lifting plate 15.

[0029] like Figure 5 and Figure 6 As shown, guide holes 16 are respectively opened at the four corners of the top surface of the lifting plate 15, and the guide rods 10 are movably installed together through the guide holes 16. Several guide rods 17 are also fixedly installed on the top surface of the lifting plate 15. A lifting shaft 18 is fixedly installed on the right side wall of the lifting plate 15 and passes through the vertical opening 11. A rotating hole 20 is opened on the side wall of the roller 19, and it is movably fitted on the outside of the lifting shaft 18 through the rotating hole 20. A baffle 21 is fixedly installed at the other end of the lifting shaft 18. The roller 19 is also movably installed in the inclined groove 26. When the movable plate 23 moves horizontally under the drive of the electric push rod 22, the roller 19... The movable plate 23 is installed in the inclined chute 26. The horizontal movement of the movable plate 23 will generate a vertical component force on the lifting shaft 18 through the roller 19. When the roller 19 moves from the low to the high in the inclined chute 26, it will cause the lifting shaft 18 to move upward in the vertical opening 11, thereby driving the lifting plate 15 to move up and down along the guide rod 10. The guide rod 17 on the top surface of the lifting plate 15 will extend into the mesh of the screen 5 as the lifting plate 15 rises, pushing out the blocked seeds, so as to play the purpose of preventing blockage and clearing the screen 5. The baffle 21 is fixed to the other end of the lifting shaft 18 to prevent the roller 19 from falling off the lifting shaft 18.

[0030] The specific sieving principle of this sieving device for crop seeds is as follows:

[0031] Crop seeds enter the screening box 2 through the feed inlet 8 on the top surface of the sealed cover 7. The vibrating motor 4, fixedly connected to the bottom of the screening box 2, is activated. The vibration generated by the motor 4 is transmitted to the screen 5 inside the screening box 2. Because a shock-absorbing spring 3 is fixedly connected between the support 1 and the screening box 2, the impact of vibration on the support 1 and the external environment is reduced, allowing the screening box 2 to vibrate relatively stably. The seeds bounce and move continuously on the screen 5 due to the vibration. Seeds that fit the mesh size of the screen 5 fall through, while larger seeds or impurities remain on the screen 5. The fallen seeds are discharged from the discharge port 6 on the left side of the bottom surface of the screening box 2, thus achieving the purpose of screening crop seeds by size.

[0032] The anti-clogging mechanism 9, in conjunction with the specific operating principle of this screening device, is as follows:

[0033] When the mesh of screen 5 becomes clogged after prolonged use, affecting the screening effect and efficiency of crop seeds, the electric actuator 22 installed on the mounting base 14 is activated. The electric actuator 22 will drive the output end to retract, and through the connecting block 24, it will drive the movable plate 23 to move to the right side of the bottom of the transverse plate 12. The T-shaped sliding strip 25 installed on the top surface of the movable plate 23 will slide in the T-shaped sliding groove 13 opened on the bottom surface of the transverse plate 12. At the same time, because the roller 19 is located in the inclined groove 26 opened on the side wall of the movable plate 23, when the movable plate 23 moves to the right, the roller 19 will roll from the lower position to the higher position in the inclined groove 26. When rolling, the roller 19 will rotate along the lifting shaft 18 through the rotating hole 20. Driven by the roller 19, the lifting shaft 18 will move vertically upward in the vertical opening 11 opened on the right side wall of the screening box 2. During the movement, it will further drive the lifting plate 15 to pass through the guide hole. 16 moves upward synchronously along the guide rod 10 installed on the bottom surface of the screening box 2 until the guide rod 17 installed on the top surface of the lifting plate 15 passes through the corresponding mesh of the screen 5, and pushes out the deformed seeds stuck in the mesh that cause blockage. In this way, the screen 5 can be cleared and unclogged. The electric push rod 22 drives the movable plate 23 to move left and right continuously, so that the lifting plate 15 can repeatedly clear the screen 5 during the up and down movement, so as to effectively prevent the screen 5 from getting blocked. Thus, the screen 5 can be cleaned in real time during the screening process without stopping the machine to deal with the problem of screen 5 blockage. This realizes efficient and continuous operation of screening work in the process of crop seed production, and can automatically clean the screen 5, which greatly reduces the frequency of manual cleaning. There is no need for frequent manual disassembly of the screen 5 for cleaning, which not only reduces labor costs, but also reduces the labor intensity of operators, thereby improving the screening effect, screening efficiency and work efficiency of crop seeds.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A screening device for crop seed production, comprising a support (1) and a screening box (2), wherein a shock-absorbing spring (3) is fixedly connected between the support (1) and the screening box (2), and a vibration motor (4) is fixedly connected to the bottom surface of the screening box (2), a screen (5) is fixedly connected inside the screening box (2), and a discharge port (6) is provided on the left side of the bottom surface of the screening box (2), and a sealing cover (7) is fixedly connected to the top surface of the screening box (2), and a feed inlet (8) is provided on the top surface of the sealing cover (7), characterized in that: The lower part of the screen (5) is provided with an anti-blocking mechanism (9), and the anti-blocking mechanism (9) comprises a jacking plate (15), a dredging rod (17), an electric push rod (22) and a movable plate (23), the jacking plate (15) is movably connected with the guide rod (10) in the screening box (2) through the guide hole (16) in the top surface, and the top surface of the jacking plate (15) is fixedly connected with the dredging rod (17), the electric push rod (22) is fixedly connected on the mounting seat (14) of the side wall of the screening box (2), and the movable plate (23) is fixedly connected with the output end of the electric push rod (22) through the connecting block (24) on the side wall, and the jacking plate (15) is movably connected with the movable plate (23) through the roller (19) externally sleeved on one side of the jacking shaft (18).

2. A screening device for the production of crop seeds according to claim 1, characterized in that: The inside bottom surface of the screening box (2) is fixedly provided with guide rods (10) at four corner end portions.

3. A screening device for the production of crop seeds according to claim 2, characterized in that: A vertical opening (11) is formed in the right side wall of the screening box (2).

4. A screening device for the production of crop seeds according to claim 3, characterized in that: A horizontal plate (12) is fixedly installed at the top end of the vertical opening (11) of the right side wall of the screening box (2), a T-shaped sliding groove (13) is formed in the bottom surface of the horizontal plate (12), and a mounting seat (14) is further fixedly installed on the right side wall of the screening box (2).

5. A screening device for the production of crop seeds according to claim 4, characterized in that: The electric push rod (22) is fixedly installed on the side wall of the mounting seat (14), the connecting block (24) is fixedly installed on the side wall of the movable plate (23) and fixedly installed together with the output end of the electric push rod (22), a T-shaped sliding strip (25) is fixedly installed on the top surface of the movable plate (23) and movably installed in the T-shaped sliding groove (13), and an inclined chute (26) is further formed in the side wall of the movable plate (23).

6. A screening device for the production of crop seeds according to claim 5, characterized in that: The top surface of the jacking plate (15) is provided with guide holes (16) at four corner end portions and movably installed together with the guide rods (10) through the guide holes (16), and a plurality of dredging rods (17) are further fixedly installed on the top surface of the jacking plate (15), a jacking shaft (18) is fixedly installed on the right side wall of the jacking plate (15) and penetrates through the vertical opening (11), a rotating hole (20) is formed in the side wall of the roller (19) and movably sleeved on the outside of the jacking shaft (18) through the rotating hole (20), a baffle (21) is fixedly installed on the other end of the jacking shaft (18), and the roller (19) is further movably installed in the inclined chute (26).

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