A seed screening device for agricultural technology

Abstract

This utility model discloses a seed screening device for agricultural technology, including a base, a support frame fixedly mounted on the base, a sieve barrel rotatably mounted on the support frame, a fixing ring fixedly mounted on the inner side of the sieve barrel, a cylinder between the outer side of the sieve barrel and the support frame, the two ends of the cylinder being rotatably connected to the sieve barrel and the support frame respectively, a sieve plate on the bottom surface of the sieve barrel, and multiple sets of fixing mechanisms on the sieve plate, each fixing mechanism including a rod and a fixing sleeve, the rod being inserted into the sieve plate and the fixing ring, the fixing sleeve being inserted into the bottom end of the rod, a sliding hole being opened on the inner side of the fixing sleeve, multiple sets of sliding holes being provided with locking blocks respectively, a push spring being connected between the top of each set of locking blocks and the sliding hole, and a locking groove being opened on the outer side of the rod. By setting a combined structure composed of a rod and a fixing sleeve at the bottom of the sieve plate, precise positioning and firm connection between the sieve plate and the fixing ring are achieved.

Description

Technical Field

[0001] This utility model relates to the field of agricultural production technology, and more specifically, it relates to a seed screening device for agricultural technology. Background Technology

[0002] In modern agricultural production, seed screening is a key pretreatment step before crop planting, which directly affects planting quality and yield. Traditional seed screening equipment generally adopts a fixed screen plate structure, using bolts or clips to fix the screen plate to the frame. When different seed specifications need to be screened, operators need to use special tools to disassemble the fixing parts one by one. The whole replacement process is time-consuming and cumbersome, which makes it difficult to meet the urgent need for screening efficiency in large-scale agricultural production.

[0003] In the process of promoting and applying agricultural technology, seed screening equipment needs to adapt to diverse operating environments and different types of seed processing requirements. Existing screening equipment often requires adjustment of multiple fixing points during the disassembly and assembly of the screen plates, and lacks standardized quick interface design. This leads to problems such as improper installation or insecure fixing when replacing screen plates, which not only reduces operating efficiency, but may also cause a decline in screening quality and equipment damage due to poor screen plate fixing. It cannot effectively support the strict requirements for seed purity and uniformity in agricultural production. Utility Model Content

[0004] (a) Technical problems to be solved In view of the problems existing in the prior art, this utility model provides a seed screening device for agricultural technology to solve the technical problems mentioned in the background art.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a seed screening device for agricultural technology, comprising a base, a support frame fixedly mounted on the base, a sieve barrel rotatably mounted on the support frame, a fixing ring fixedly mounted on the inner side of the sieve barrel, a cylinder between the outer side of the sieve barrel and the support frame, the two ends of the cylinder being rotatably connected to the sieve barrel and the support frame respectively, a sieve plate being provided on the bottom surface of the sieve barrel, a plurality of fixing mechanisms being provided on the sieve plate, each fixing mechanism comprising a rod and a fixing sleeve, the rod being inserted into the sieve plate and the fixing ring, the fixing sleeve being inserted into the bottom end of the rod, a sliding hole being provided on the inner side of the fixing sleeve, a plurality of sliding holes being provided and slidably connected to a locking block, a push spring being connected between the top of each plurality of locking blocks and the sliding hole, a locking groove being provided on the outer side of the rod, a plurality of locking grooves being provided and engaging with each plurality of locking blocks, and a collection box being detachably mounted on the base.

[0006] The present invention is further configured such that a top block is fixedly provided at the top of the insertion rod, a compression spring is connected to the bottom surface of the top block, and a washer is fixedly connected to the bottom end of the compression spring. The combination structure of the top block and the compression spring forms an elastic connection mechanism, which makes the installation of the insertion rod more flexible and stable, while providing appropriate pre-tightening force to ensure that the screen plate and the fixed ring are tightly fitted to prevent loosening.

[0007] The present invention is further configured such that the fixing ring has a fixing hole and the screen plate has an insertion hole. Multiple sets of fixing holes and insertion holes are provided and are respectively inserted into the insertion rod, providing a precise positioning structure to ensure accurate installation of the screen plate and enhancing overall stability through multi-point fixing to prevent the screen plate from shifting or deforming during working vibration.

[0008] The present invention is further configured such that push blocks are fixedly provided on the outer side of each of the multiple sets of card blocks, and sliding grooves are provided on the outer wall of the fixed sleeve. Multiple sets of sliding grooves are provided, and guide grooves are provided on the inner side of each set. The multiple sets of push blocks slide in the multiple sets of guide grooves respectively, forming a precise motion guiding mechanism that makes the movement of the card blocks more stable and controllable, and at the same time facilitates the transmission of external force to the card blocks through the push blocks to achieve a quick unlocking operation.

[0009] The present invention is further configured such that a sliding sleeve is slidably provided on the outer wall of the fixed sleeve, and a push plate is fixedly provided on the inner side of the sliding sleeve. The push plate is provided in multiple sets and slides in multiple sets of sliding grooves respectively, forming a convenient unlocking operation mechanism. By driving multiple sets of push plates simultaneously with a single sliding action, multi-point synchronous unlocking is achieved, which greatly simplifies the operation process and improves disassembly efficiency.

[0010] The present invention is further configured such that a positioning strip is fixedly provided on the inner side of the fixing sleeve, and a strip groove is provided on the outer wall of the insertion rod. Multiple sets of the positioning strip and the strip groove are provided and slidably connected to establish an anti-rotation positioning structure to prevent the insertion rod from rotating during use, ensuring that the position of the locking block and the locking groove is always aligned and improving the connection reliability.

[0011] The present invention is further configured such that a limiting sleeve is fixedly provided on the outer side of the sliding sleeve, and a limiting groove is provided on the outer wall of the limiting sleeve. Multiple sets of limiting grooves are provided, and each of them has an unlocking hole at one end. A rotating sleeve is rotatably provided on the outer wall of the fixed sleeve, and a support rod is fixedly provided on the top surface of the rotating sleeve. Multiple sets of support rods are provided, and each of them has a limiting block fixed on its outer wall. Multiple sets of limiting blocks are provided and are respectively fixed on the outer wall and top of multiple sets of support rods. A safe locking and unlocking mechanism is created. By rotating the support rod, the state is switched from the limiting groove to the unlocking hole to prevent the sliding sleeve from moving and the connection from becoming loose due to accidental operation during use.

[0012] The present invention is further configured such that the inner side of the rotating sleeve is provided with a movable groove, the movable groove is provided with multiple sets and each of the movable grooves is connected to a compression spring, the top of each of the multiple sets of compression springs is fixed with a positioning block, the multiple sets of positioning blocks slide in the multiple sets of movable grooves respectively, and the outer wall of the fixed sleeve is provided with a positioning groove, the positioning groove is provided with multiple sets and abuts against the multiple sets of positioning blocks respectively, providing a precise rotation positioning feedback mechanism so that the operator can clearly perceive the position of the rotating sleeve and the compression springs provide appropriate resistance to prevent the rotating sleeve from rotating accidentally, ensuring the stable and reliable operation of the entire locking system.

[0013] (III) Beneficial Effects Compared with the prior art, this utility model provides a seed screening device for agricultural technology, which has the following beneficial effects: 1. This device features an innovative fast-installation and disassembly mechanism. By setting a combination structure consisting of a rod and a fixing sleeve at the bottom of the sieve plate, precise positioning and secure connection between the sieve plate and the fixing ring are achieved. During installation, simply insert the rod into the corresponding holes of the sieve plate and the fixing ring in sequence, and the fixing sleeve will automatically engage with the bottom end of the rod to form a lock. The entire process can be completed without any tools, effectively solving the problem of cumbersome and time-consuming sieve plate replacement in traditional screening equipment, and significantly improving the operating efficiency and adaptability of seed screening equipment in agricultural production.

[0014] 2. This device is equipped with an intelligent locking and unlocking system. The combination of the top block and the compression spring provides automatic positioning force. At the same time, the precise meshing of multiple sets of locking blocks and slots ensures a stable and reliable connection. The specially designed locking block structure with push spring realizes the automatic locking function after insertion. When unlocking, simply rotate the rotating sleeve to drive the support rod into the unlocking position and push the sliding sleeve. The locking block can then be disengaged from the slot by the linkage of the push plate and the push block to achieve quick unlocking. This user-friendly design makes the screen plate replacement process simple and intuitive, which can be completed without professional skills, greatly reducing the difficulty of operation and labor intensity.

[0015] 3. This device adopts a safety design with precise positioning and anti-misoperation features. The cooperation between the positioning strip and the slot ensures the correct installation position of the insertion rod and the fixing sleeve. The dual limiting mechanism of the limiting sleeve and the limiting block prevents the sliding sleeve from accidentally sliding and causing the connection to loosen during use. At the same time, the combination of the compression spring and the positioning block provides precise positioning feedback for the rotating sleeve. The entire system forms a complete and efficient operation process from insertion and positioning to locking and disassembly, which completely solves the problem of unstable screen plate fixing or difficult disassembly and assembly in traditional screening equipment. It provides safer and more reliable technical support for agricultural seed screening and significantly improves screening quality and equipment service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a seed screening device for agricultural technology according to the present invention; Figure 2 This is a cross-sectional view of the sieve barrel in this utility model; Figure 3 This is a schematic diagram of the disassembled structure of the fixing mechanism in this utility model; Figure 4 This is a cross-sectional view of the fixing sleeve in this utility model; Figure 5 This is a cross-sectional view of the sliding groove in this utility model.

[0017] In the diagram: 1. Base; 2. Support frame; 3. Screen barrel; 4. Fixing ring; 5. Cylinder; 6. Screen plate; 7. Insert rod; 8. Fixing sleeve; 9. Sliding hole; 10. Locking block; 11. Push spring; 12. Locking groove; 13. Collection box; 14. Top block; 15. Compression spring; 16. Washer ring; 17. Fixing hole; 18. Insertion hole; 19. Push block; 20. Sliding groove; 21. Guide groove; 22. Sliding sleeve; 23. Push plate; 24. Positioning strip; 25. Strip groove; 26. Limiting sleeve; 27. Limiting groove; 28. Unlocking hole; 29. ​​Rotating sleeve; 30. Support rod; 31. Limiting block; 32. Movable groove; 33. Compression spring; 34. Positioning block; 35. Positioning groove. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0020] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0021] Please see Figures 1-5A seed screening device for agricultural technology includes a base 1, a support frame 2 fixedly mounted on the base 1, a sieve barrel 3 rotatably mounted on the support frame 2, a fixing ring 4 fixedly mounted inside the sieve barrel 3, a cylinder 5 between the outside of the sieve barrel 3 and the support frame 2, the two ends of the cylinder 5 being rotatably connected to the sieve barrel 3 and the support frame 2 respectively, a sieve plate 6 on the bottom surface of the sieve barrel 3, multiple sets of fixing mechanisms on the sieve plate 6, each fixing mechanism including a rod 7 and a fixing sleeve 8, the rod 7 being inserted into the sieve plate 6 and the fixing ring 4, the fixing sleeve 8 being inserted into the bottom end of the rod 7, a sliding hole 9 being opened inside the fixing sleeve 8, multiple sets of sliding holes 9 being provided with slidably connected locking blocks 10, a push spring 11 being connected between the top of each set of locking blocks 10 and the sliding hole 9, a slot 12 being opened outside the rod 7, multiple sets of slots 12 being provided and engaging with each set of locking blocks 10, and a collection box 13 being detachably mounted on the base 1.

[0022] A top block 14 is fixedly provided at the top of the insertion rod 7, and a compression spring 15 is connected to the bottom surface of the top block 14. A washer 16 is fixedly connected to the bottom end of the compression spring 15.

[0023] The fixing ring 4 has a fixing hole 17 and the sieve plate 6 has an insertion hole 18. Both the fixing hole 17 and the insertion hole 18 are provided in multiple sets and are respectively inserted into the insertion rod 7. Multiple sets of card blocks 10 are fixedly provided with push blocks 19 on the outer side. The outer wall of the fixed sleeve 8 is provided with a sliding groove 20. Multiple sets of sliding grooves 20 are provided, and each set of sliding grooves 21 is provided on the inner side. Multiple sets of push blocks 19 slide in multiple sets of guide grooves 21 respectively.

[0024] The outer wall of the fixed sleeve 8 is provided with a sliding sleeve 22, and the inner side of the sliding sleeve 22 is fixedly provided with a push plate 23. The push plate 23 is provided in multiple sets and slides in multiple sets of sliding grooves 20 respectively.

[0025] The inner side of the fixed sleeve 8 is fixedly provided with a positioning strip 24, and the outer wall of the insertion rod 7 is provided with a strip groove 25. The positioning strip 24 and the strip groove 25 are provided in multiple sets and are slidably connected.

[0026] A limiting sleeve 26 is fixedly provided on the outer side of the sliding sleeve 22. A limiting groove 27 is provided on the outer wall of the limiting sleeve 26. Multiple sets of limiting grooves 27 are provided, and each one end is provided with an unlocking hole 28. A rotating sleeve 29 is rotatably provided on the outer wall of the fixed sleeve 8. A support rod 30 is fixedly provided on the top surface of the rotating sleeve 29. Multiple sets of support rods 30 are provided, and each one is fixedly provided with a limiting block 31 on its outer wall. Multiple sets of limiting blocks 31 are provided and are respectively fixed on the outer wall and top of multiple sets of support rods 30.

[0027] The inner side of the rotating sleeve 29 is provided with a movable groove 32. Multiple sets of movable grooves 32 are provided, and each set of the movable grooves 32 is connected to a compression spring 33. The top of each set of compression springs 33 is fixed with a positioning block 34. The multiple sets of positioning blocks 34 slide in the multiple sets of movable grooves 32. The outer wall of the fixed sleeve 8 is provided with a positioning groove 35. Multiple sets of positioning grooves 35 are provided and abut against the multiple sets of positioning blocks 34.

[0028] In this embodiment, before use, a suitable sieve plate 6 is first installed. Multiple sets of insertion holes 18 are aligned with multiple sets of fixing holes 17 and inserted into the insertion rod 7, so that the washer ring 16 abuts against the top surface of the fixing ring 4 and presses the compression spring 15. Then, the fixing sleeve 8 and the insertion rod 7 are positioned and inserted into the strip groove 25 through multiple sets of positioning strips 24. The bottom end of the insertion rod 7 pushes multiple sets of locking blocks 10 to slide into the sliding hole 9 and presses the push spring 11. When the insertion rod 7 is fully inserted into the fixing... After the fixed sleeve 8 is inserted, the fixed sleeve 8 abuts against the bottom surface of the sieve plate 6. Multiple sets of push springs 11 reset and push the locking block 10 to engage in the locking groove 12, thereby locking the insertion rod 7. The multiple sets of fixing mechanisms are operated in sequence to complete the quick installation of the sieve plate 6. The seeds are poured into the sieve bucket 3. The sieve bucket 3 is repeatedly pushed and pulled by the telescopic end of the cylinder 5 to make it rotate along the support frame 2, so that the seeds in the sieve bucket 3 repeatedly roll on the top surface of the sieve plate 6 for screening. The screened seeds fall into the collection box 13.

[0029] More specifically, when the screen plate 6 needs to be disassembled, rotating the rotating sleeve 29 drives multiple sets of support rods 30 to rotate, causing the multiple sets of support rods 30 to slide out of the limiting groove 27 and move into the unlocking hole 28, thereby releasing the contact between the multiple sets of limiting blocks 31 and the sides of the limiting sleeve 26, releasing the limiting of the sliding sleeve 22, pushing the sliding sleeve 22 to make the multiple sets of push plates 23 slide along the sliding groove 20 and push the push block 19 to slide along the guide groove 21, and the multiple sets of push blocks 19 pull the locking block 10 to disengage it from the locking groove 12, releasing the locking of the insertion rod 7, and the compression spring 15 resets and pushes the top block 14 to pull the insertion rod 7 away from the fixing sleeve 8. The disassembly of the screen plate 6 is completed by operating the multiple sets of fixing mechanisms in sequence. When the screen plate 6 is disassembled again, the screen plate 6 can be disassembled. Before the sieve plate 6 is installed, the sliding sleeve 22 drives multiple sets of push plates 23 to slide to one end of the slide groove 20 and releases the contact with the push block 19. At this time, multiple sets of support rods 30 are respectively in the unlocking hole 28. Rotating the rotating sleeve 29 causes multiple sets of support rods 30 to slide into the limiting groove 27. Multiple sets of limiting blocks 31 respectively abut against both sides of the limiting sleeve 26 to limit the sliding sleeve 22. Multiple sets of compression springs 33 push the positioning block 34 to abut against the positioning groove 35 to position the rotating sleeve 29. When the rotating sleeve 29 is rotated, multiple sets of positioning grooves 35 push the positioning block 34 to disengage from the positioning groove 35 and squeeze the compression spring 33, so that multiple sets of positioning blocks 34 continuously move between multiple sets of positioning grooves 35.

[0030] In summary, when using or operating the entire equipment: First, install the appropriate model of screen plate 6. Align the multiple sets of insertion holes 18 with the multiple sets of fixing holes 17 and insert them into the insertion rod 7, so that the washer ring 16 abuts against the top surface of the fixing ring 4 and presses the compression spring 15. Then, position and insert the fixing sleeve 8 and the insertion rod 7 into the strip groove 25 through the multiple sets of positioning strips 24. Push the multiple sets of locking blocks 10 into the sliding hole 9 through the bottom end of the insertion rod 7 and press the push spring 11. When the insertion rod 7 is fully inserted... After being inserted into the fixing sleeve 8, the fixing sleeve 8 abuts against the bottom surface of the sieve plate 6. Multiple sets of push springs 11 reset and push the locking block 10 to engage in the locking groove 12, thereby engaging the insertion rod 7. The multiple fixing mechanisms are operated in sequence to complete the quick installation of the sieve plate 6. The seeds are poured into the sieve bucket 3. The sieve bucket 3 is repeatedly pushed and pulled by the telescopic end of the cylinder 5 to make it rotate along the support frame 2, so that the seeds in the sieve bucket 3 repeatedly roll on the top surface of the sieve plate 6 for screening. The screened seeds fall into the collection box 13.

[0031] When the screen plate 6 needs to be disassembled, rotating the rotating sleeve 29 drives the multiple sets of support rods 30 to rotate, causing the multiple sets of support rods 30 to slide out of the limiting groove 27 and move into the unlocking hole 28, thereby releasing the contact between the multiple sets of limiting blocks 31 and the two sides of the limiting sleeve 26, releasing the limiting of the sliding sleeve 22, pushing the sliding sleeve 22 to make the multiple sets of push plates 23 slide along the sliding groove 20 and push the push block 19 to slide along the guide groove 21. The multiple sets of push blocks 19 pull the locking block 10 to disengage it from the locking groove 12, releasing the locking of the insertion rod 7. The compression spring 15 resets and pushes the top block 14 to pull the insertion rod 7 out of the fixing sleeve 8. The disassembly of the screen plate 6 is completed by operating the multiple sets of fixing mechanisms in sequence. When the screen plate is disassembled again... 6. Before installation, the sliding sleeve 22 drives multiple sets of push plates 23 to slide to one end of the slide groove 20 and releases the contact with the push block 19. At this time, multiple sets of support rods 30 are respectively in the unlocking hole 28. Rotating the rotating sleeve 29 causes multiple sets of support rods 30 to slide into the limiting groove 27. Multiple sets of limiting blocks 31 respectively abut against both sides of the limiting sleeve 26 to limit the sliding sleeve 22. Multiple sets of compression springs 33 push the positioning block 34 to abut against the positioning groove 35 to position the rotating sleeve 29. When the rotating sleeve 29 is rotated, multiple sets of positioning grooves 35 push the positioning block 34 to disengage from the positioning groove 35 and squeeze the compression spring 33, so that multiple sets of positioning blocks 34 continuously move between multiple sets of positioning grooves 35.

[0032] Of all the solutions mentioned above, those involving connections between two components can be selected based on the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other well-known connection methods. These will not be elaborated on here. For all the fixed connections mentioned above, welding is the preferred option. In all the solutions mentioned above, the operation of electrical components, unless otherwise specified, is controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and wiring connections are existing, well-known, and mature technologies, and their specific circuit structures will not be described in detail here. The specific models and specifications of the electrical components involved in this solution need to be selected and determined according to the actual specifications of the device. The specific selection and calculation methods adopt existing technologies in this field, and therefore will not be described in detail. Of all the solutions mentioned above, those involving motors can be combined with reducers if necessary. The connection structure and working principle between the motor and the reducer are existing well-known technologies, and this utility model will not describe them in detail. 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 seed screening device for agricultural technology, comprising a base (1), characterized in that: A support frame (2) is fixedly mounted on the base (1). A sieve barrel (3) is rotatably mounted on the support frame (2). A fixing ring (4) is fixedly mounted on the inner side of the sieve barrel (3). A cylinder (5) is provided between the outer side of the sieve barrel (3) and the support frame (2). The two ends of the cylinder (5) are rotatably connected to the sieve barrel (3) and the support frame (2) respectively. A sieve plate (6) is provided on the bottom surface of the sieve barrel (3). Multiple fixing mechanisms are provided on the sieve plate (6). The fixing mechanism includes a rod (7) and a fixing sleeve (8). The rod (7) is inserted into the sieve. Inside the plate (6) and the fixing ring (4), the fixing sleeve (8) is inserted into the bottom end of the insertion rod (7). The inner side of the fixing sleeve (8) is provided with a sliding hole (9). The sliding hole (9) is provided with multiple sets and is slidably connected with a locking block (10). The top of the multiple sets of locking blocks (10) is connected to the sliding hole (9) with a push spring (11). The outer side of the insertion rod (7) is provided with a slot (12). The slot (12) is provided with multiple sets and is engaged with multiple sets of locking blocks (10). The base (1) is detachably installed with a collection box (13).

2. A seed screening apparatus for agricultural technology according to claim 1, characterized in that: The top of the insert (7) is fixedly provided with a top block (14), and the bottom surface of the top block (14) is connected to a compression spring (15), and the bottom end of the compression spring (15) is fixedly connected to a washer (16).

3. A seed screening apparatus for agricultural technology according to claim 2, characterized in that: The fixing ring (4) has a fixing hole (17) and the sieve plate (6) has an insertion hole (18). The fixing hole (17) and the insertion hole (18) are provided in multiple sets and are respectively inserted into the insertion rod (7).

4. The seed screening equipment for agricultural technology according to claim 3, characterized in that: multiple sets Push blocks (19) are fixedly provided on the outer side of each of the card blocks (10). A sliding groove (20) is provided on the outer wall of the fixed sleeve (8). Multiple sets of sliding grooves (20) are provided, and guide grooves (21) are provided on the inner side of each sliding groove. Multiple sets of push blocks (19) slide in multiple sets of guide grooves (21).

5. The seed screening equipment for agricultural technology according to claim 4, characterized in that: The outer wall of the fixed sleeve (8) is provided with a sliding sleeve (22), and the inner side of the sliding sleeve (22) is provided with a push plate (23). The push plate (23) is provided in multiple sets and slides in multiple sets of sliding grooves (20).

6. The seed screening equipment for agricultural technology according to claim 5, characterized in that: The inner side of the fixed sleeve (8) is fixedly provided with a positioning strip (24), and the outer wall of the insertion rod (7) is provided with a strip groove (25). The positioning strip (24) and the strip groove (25) are provided in multiple sets and are slidably connected.

7. The seed screening equipment for agricultural technology according to claim 6, characterized in that: The outer side of the sliding sleeve (22) is fixedly provided with a limiting sleeve (26). The outer wall of the limiting sleeve (26) is provided with a limiting groove (27). The limiting groove (27) is provided with multiple sets and each end is provided with an unlocking hole (28). The outer wall of the fixed sleeve (8) is rotatably provided with a rotating sleeve (29). The top surface of the rotating sleeve (29) is fixedly provided with a support rod (30). The support rod (30) is provided with multiple sets and each outer wall is fixedly provided with a limiting block (31). The limiting block (31) is provided with multiple sets and is respectively fixed on the outer wall and top of multiple sets of support rods (30).

8. The seed screening equipment for agricultural technology according to claim 7, characterized in that: The rotating sleeve (29) has a movable groove (32) on its inner side. The movable groove (32) is provided in multiple sets and each of them is connected to a compression spring (33). The top of each of the multiple sets of compression springs (33) is fixedly provided with a positioning block (34). The multiple sets of positioning blocks (34) slide in the multiple sets of movable grooves (32). The outer wall of the fixed sleeve (8) has a positioning groove (35). The positioning groove (35) is provided in multiple sets and abuts against the multiple sets of positioning blocks (34).

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