A seed screening apparatus

Abstract

The utility model discloses a kind of seed screening equipment, belong to tobacco machinery technical field, including vibrating screen main body, still include adjustable unloading mechanism, synchronous type paving mechanism and clean screen mesh reverse mechanism, adjustable unloading mechanism, synchronous type paving mechanism and clean screen mesh reverse mechanism are respectively connected on vibrating screen main body, synchronous type paving mechanism includes paving limit driven assembly, paving function assembly, paving drive assembly and vibration power component, and vibrating screen main body is connected with paving limit driven assembly and vibration power component, and multiple groups of synchronous paving function assembly are connected with paving limit driven assembly, and vibrating screen main body is connected with paving limit driven assembly and vibration power component, and vibrating screen main body is connected with paving drive assembly and vibration power component. By the above-mentioned mode, the effect that controllable feeding of material and vibrating synchronous paving material is realized, and screen mesh can be quickly reversed and cleaned after screening.

Description

Technical Field

[0001] This utility model relates to the field of tobacco machinery technology, specifically to a seed screening device. Background Technology

[0002] Tobacco seed screening is the process of separating tobacco seeds according to indicators such as size to improve seed purity and planting quality. Because tobacco seeds are small in size and easily contaminated, screening technology is crucial for tobacco breeding and cultivation.

[0003] Current technologies for tobacco seed screening utilize air separation or vibrating screens. In traditional vibrating screens, the feeding speed is constant and uncontrollable, easily leading to excessive material feeding at once. This not only affects screening quality but can also damage the equipment in severe cases. Furthermore, existing technologies lack auxiliary leveling structures, causing the material to accumulate after falling from the top feed port. Relying solely on vibration to level the material results in low screen utilization in the first half of the machine, further impacting screening quality and consequently affecting subsequent seed breeding and planting. In addition, due to the small particle size of tobacco seeds, there is a risk of material jamming during vibrating screening, requiring cleaning after screening. However, the screen loading and unloading of traditional screening machines is cumbersome, consuming significant manpower and time for each cleaning.

[0004] Based on this, the present invention designs a seed screening device to solve the above problems. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a seed screening device.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A seed screening device includes a vibrating screen body, an adjustable feeding mechanism, a synchronous paving mechanism, and a cleaning screen reversing mechanism. The adjustable feeding mechanism, the synchronous paving mechanism, and the cleaning screen reversing mechanism are respectively connected to the vibrating screen body. The synchronous paving mechanism includes a paving limiting driven component, a paving function component, a paving drive component, and a vibration power component. The paving limiting driven component and the vibration power component are both connected to the vibrating screen body. Multiple sets of synchronous paving function components are connected to the paving limiting driven component. The paving limiting driven component is connected to the vibration power component. The paving drive component is connected to the vibration power component. The vibration power component provides power for the vibration of the vibrating screen body and also provides power for the paving drive component. The paving limiting driven component and the paving function component work together to achieve the synchronous paving function. Furthermore, the main body of the vibrating screen includes a vibrating frame, a screen box, and a drive motor. The screen box is connected to the vibrating frame, the housing of the drive motor is fixedly connected to the vibrating frame, the output end of the drive motor is connected to the vibration power component, the screen box is connected to the vibration power component, the vibration power component provides power for the vibration of the screen box, and the flat limiting driven component is connected to the vibrating frame. Furthermore, the tiling limit driven component includes a limit rod and a reciprocating screw. The reciprocating screw is rotatably connected to the upper support of the vibration frame. One end of the reciprocating screw is connected to the tiling drive component. The limit rod is located above the reciprocating screw and is fixedly connected to the upper support of the vibration frame. Both the limit rod and the reciprocating screw are connected to the synchronous tiling function component. Furthermore, the synchronous tiling function component includes a slider and a tiling plate. The lower end of the slider is threadedly connected to a reciprocating lead screw, the upper end of the slider is slidably connected to a limit rod, and the tiling plate is fixedly connected to the lower end of the slider. The tiling plate moves back and forth to tiling the seeds to be screened. Furthermore, the tiling drive assembly includes a tiling driven wheel, a tiling driving wheel, and a tiling belt. The tiling driven wheel is fixedly connected to one end of the reciprocating screw, the tiling driving wheel is connected to the vibration power assembly, and the tiling driving wheel and the tiling driven wheel are connected by a tiling belt drive. Furthermore, the adjustable feeding mechanism includes a feeding bin, a feeding shaft, partition plates, and a feeding drive assembly. The lower end of the feeding bin is fixedly connected to the upper end of the vibrating frame. The feeding shaft is rotatably connected to the middle of the feeding bin. Multiple sets of partition plates are fixedly connected to the feeding shaft. The partition plates are arranged in a circular array along the feeding shaft, and the outer wall of the partition plates slides against the inner wall of the feeding bin. The feeding drive assembly is connected to the feeding shaft and is used to drive the feeding shaft to rotate. Furthermore, the clean screen reversing mechanism includes a screen and a screen locking assembly. A left-end discharge port is fixedly connected to the upper front end of the screen box. The left-end discharge port consists of two vertical plates and one horizontal plate. The vertical plates are fixedly connected to the front and rear ends of the horizontal plate. The left end of the inclined plate is fixedly connected to the vertical plate at the front end, and the right end of the inclined plate is fixedly connected to the inner wall of the front end of the screen box. The inclined plate is used to guide the material on the screen to the left-end discharge port. The front-end discharge port is located below the left-end discharge port and the inclined plate. The rear end of the front-end discharge port is fixedly connected to the screen box. The front-end discharge port consists of two vertical plates and one horizontal plate. The upper end of the horizontal plate is on the same plane as the lower inner wall of the screen box. Screen clearance holes for the screen to pass through are opened on the inclined plate. Screen moving grooves that slide with the screen are opened on the inner walls of both sides of the screen box. Multiple sets of screen locking assemblies are symmetrically distributed on the left and right. Each side of the screen locking assembly is linearly arrayed along the side wall of the screen box. The screen locking assemblies are connected to the screen box and the screen respectively. Furthermore, the screen locking assembly includes a rotating handle, a fixed shaft, a fixed column, a spring, a locking block, and a limiting block. Screen fixing grooves are provided at both ends of the screen for sliding connection with the locking block. Screen box fixing grooves are provided at both ends for sliding with the locking block and the fixed column. A limiting block is fixedly connected to the upper end of the screen box fixing groove to prevent the locking block from moving out of the screen box fixing groove. The upper end of the locking block is fixedly connected to the fixed column, the upper end of the fixed column is fixedly connected to the fixed shaft, and the upper end of the fixed shaft is rotatably connected to the rotating handle. The rear end of the rotating handle is a vertical plane, and the lower end is connected to the rear end by an arc. The spring is sleeved on the fixed column, with the upper end of the spring fixedly connected to the screen box and the lower end of the spring fixedly connected to the locking block.

[0007] Compared with the prior art, the advantages of this utility model are as follows: 1. The drive motor will drive the reciprocating screw to rotate synchronously, thereby driving the flat plate to swing back and forth, so that the tobacco seeds to be screened on the screen are flattened, increasing the utilization rate of the screen and the screening effect. 2. The screen and vibrating part are slidably connected, and can be quickly flipped and fixed in conjunction with the screen locking component to clean the screen by reverse vibration; 3. Place the tobacco seeds to be screened into the feeding hopper, rotate the feeding shaft to move the separator plate. The feeding speed can be controlled by adjusting the rotation speed. Batch-separated feeding can prevent excessive feeding at one time, which may lead to poor screening effect or even damage to the equipment. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This utility model relates to a three-dimensional seed screening device. Figure 1 ; Figure 2 This is a front view of a seed screening device according to the present invention; Figure 3 This is a right view of a seed screening device according to the present invention; Figure 4 This utility model relates to a three-dimensional seed screening device. Figure 2 ; Figure 5 For along Figure 2 A sectional view along the AA direction; Figure 6 For along Figure 2 BB direction sectional view; Figure 7 for Figure 5 A magnified view of point C in the middle.

[0010] The labels in the diagram represent: 1. Vibrating screen body; 11. Vibrating frame; 12. Screen box; 13. Drive motor; 14. Main body connecting column; 15. Left end discharge port; 16. Inclined plate; 17. Front end discharge port; 2. Adjustable feeding mechanism; 210. Feeding bin; 211. Feeding shaft; 212. Divider plate; 213. Feeding handle; 214. Feeding motor; 3. Synchronous spreading mechanism; 310. Limiting rod; 311. Reciprocating screw; 312. Slider; 313. Spreading plate; 314. Spreading driven wheel; 315. Spreading... 316. Drive wheel; 317. Vibration shaft; 318. Vibration driven wheel; 319. Vibration drive wheel; 320. Flat belt; 321. Vibration belt; 322. Fixing block; 323. Connecting block; 4. Cleaning screen reversing mechanism; 410. Screen clearance hole; 411. Screen; 412. Screen moving groove; 413. Rotating handle; 414. Fixing shaft; 415. Fixing column; 416. Spring; 417. Locking block; 418. Screen fixing groove; 419. Screen box fixing groove; 420. Limiting block. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0012] The terms "left," "right," "front," "back," "up," and "down" used in the following description refer to the orientation from the perspective of the front view.

[0013] Example 1: In some embodiments, please refer to the accompanying drawings. Figures 1-7 A seed screening device includes a vibrating screen body 1, and also includes an adjustable feeding mechanism 2, a synchronous spreading mechanism 3, and a cleaning screen reversing mechanism 4, which are respectively connected to the vibrating screen body 1.

[0014] The synchronous tiling mechanism 3 includes a tiling limit follower component, a tiling function component, a tiling drive component, and a vibration power component. The tiling limit follower component and the vibration power component are both connected to the vibrating screen body 1. Multiple sets of synchronous tiling function components are connected to the tiling limit follower component, the tiling limit follower component is connected to the vibration power component, and the tiling drive component is connected to the vibration power component. The vibration power component provides power for the vibration of the vibrating screen body 1 and also provides power for the tiling drive component. The tiling limit follower component and the tiling function component work together to achieve the synchronous tiling function.

[0015] The vibrating screen body 1 includes a vibrating frame 11, a screen box 12 and a drive motor 13. The screen box 12 is connected to the vibrating frame 11. The housing of the drive motor 13 is fixedly connected to the vibrating frame 11. The output end of the drive motor 13 is connected to the vibration power component. The screen box 12 is connected to the vibration power component. The vibration power component provides power for the vibration of the screen box 12. The flat limiting driven component is connected to the vibrating frame 11.

[0016] The screen box 12 and the vibrating frame 11 have multiple sets of main connecting columns 14 symmetrically distributed on the left and right. The upper end of the main connecting column 14 is rotatably connected to the vibrating frame 11, and the lower end of the main connecting column 14 is rotatably connected to the screen box 12.

[0017] The vibration power assembly includes a vibration shaft 316, a driven vibration wheel 317, a driving vibration wheel 318, a vibration belt 320, a fixing block 321, and a connecting block 322. The vibration shaft 316 is fixedly connected to the rear end of the vibration frame 11. The fixing block 321 is fixedly connected to the right end of the vibration shaft 316. The fixing block 321 is rotatably connected to the connecting block 322. The connecting block 322 is rotatably connected to the rear end of the screen box 12. The driving vibration wheel 318 is fixedly connected to the output end of the drive motor 13. The driven vibration wheel 317 and the driving vibration wheel 318 are connected by a vibration belt 320. The driven vibration wheel 317 is fixedly connected to the vibration shaft 316.

[0018] The tiling limiting driven component includes a limiting rod 310 and a reciprocating screw 311. The reciprocating screw 311 is rotatably connected to the upper support of the vibration frame 11. One end of the reciprocating screw 311 is connected to the tiling drive component. The limiting rod 310 is located above the reciprocating screw 311 and is fixedly connected to the upper support of the vibration frame 11. Both the limiting rod 310 and the reciprocating screw 311 are connected to the synchronous tiling function component.

[0019] The reciprocating screw 311 has multiple sets of reciprocating threads, and the number of sets of reciprocating threads is the same as the number of sets of synchronous flattening functional components and corresponds one-to-one.

[0020] The synchronous tiling function component includes a slider 312 and a tiling plate 313. The lower end of the slider 312 is threadedly connected to a reciprocating lead screw 311, and the upper end of the slider 312 is slidably connected to a limiting rod 310. The lower end of the slider 312 is fixedly connected to the tiling plate 313, which moves back and forth to tiling the seeds to be screened.

[0021] The tiling drive assembly includes a tiling driven wheel 314, a tiling drive wheel 315, and a tiling belt 319. The tiling driven wheel 314 is fixedly connected to one end of the reciprocating screw 311, and the tiling drive wheel 315 is fixedly connected to the vibrating shaft 316. The tiling drive wheel 315 and the tiling driven wheel 314 are connected by a tiling belt 319.

[0022] Since the vibration of the screen box 12 requires a higher rotational speed, and the movement of the flat plate 313 should not be too fast, the above effects can be achieved by having the outer diameter of the vibrating drive wheel 318 smaller than the outer diameter of the vibrating driven wheel 317, and the outer diameter of the flat drive wheel 315 smaller than the outer diameter of the flat driven wheel 314, all under the same drive motor 13.

[0023] The adjustable feeding mechanism 2 includes a feeding bin 210, a feeding shaft 211, partition plates 212, a feeding handle 213, and a feeding motor 214. The lower end of the feeding bin 210 is fixedly connected to the upper end of the vibrating frame 11. The feeding shaft 211 is rotatably connected to the middle of the feeding bin 210. Multiple partition plates 212 are fixedly connected to the feeding shaft 211. The partition plates 212 are arranged in a circular array along the feeding shaft 211, and the outer wall of the partition plates 212 slides against the inner wall of the feeding bin 210. The feeding handle 213 and the feeding motor 214 are located on the left and right sides of the feeding bin 210, respectively. The feeding handle 213 is fixedly connected to the feeding shaft 211. The outer shell of the feeding motor 214 is fixedly connected to the feeding bin 210, and the output end of the feeding motor 214 is fixedly connected to the feeding shaft 211.

[0024] The cleaning-type screen reversing mechanism 4 includes a screen 411 and a screen locking assembly. A left-end discharge port 15 is fixedly connected to the upper front end of the screen box 12. The left-end discharge port 15 consists of two vertical plates and one horizontal plate. The vertical plates are fixedly connected to the front and rear ends of the horizontal plate. The left end of the inclined plate 16 is fixedly connected to the vertical plate at the front end, and the right end of the inclined plate 16 is fixedly connected to the inner wall of the front end of the screen box 12. The inclined plate 16 is used to guide the material on the screen 411 to the left-end discharge port 15. The front-end discharge port 17 is located below the left-end discharge port 15 and the inclined plate 16. The rear end of the front-end discharge port 17 is fixedly connected to the screen box 12. 7 consists of two vertical plates and one horizontal plate. The upper end of the horizontal plate is on the same plane as the lower inner wall of the screen box 12. The distance between the vertical plates of the front discharge port 17 gradually decreases from back to front. The two vertical plates of the front discharge port 17 are used to guide the tobacco seeds. The inclined plate 16 is provided with screen clearance holes 410 for the screen 411 to pass through. The inner walls on both sides of the screen box 12 are provided with screen moving grooves 412 that are slidably connected to the screen 411. Multiple sets of screen locking components are symmetrically distributed on the left and right. The screen locking components on each side are linearly arrayed along the side wall of the screen box 12. The screen locking components are connected to the screen box 12 and the screen 411 respectively.

[0025] To ensure effective fixation, the screen locking assembly should have at least two sets.

[0026] The screen locking assembly includes a rotating handle 413, a fixed shaft 414, a fixed post 415, a spring 416, a locking block 417, and a limiting block 420. The screen 411 has screen fixing grooves 418 at both ends for sliding connection with the locking block 417. The screen box 12 has screen box fixing grooves 419 at both ends for sliding with the locking block 417 and the fixed post 415. A limiting block 420 is fixedly connected to the upper end of the screen box fixing groove 419 to prevent locking. Block 417 is moved out of the screen box fixing groove 419. The upper end of the locking block 417 is fixedly connected to the fixing column 415. The upper end of the fixing column 415 is fixedly connected to the fixing shaft 414. The upper end of the fixing shaft 414 is rotatably connected to the rotating handle 413. The rear end of the rotating handle 413 is a vertical plane. The lower end is connected to the rear end by an arc. The spring 416 is sleeved on the fixing column 415. The upper end of the spring 416 is fixedly connected to the screen box 12. The lower end of the spring 416 is fixedly connected to the locking block 417.

[0027] In this invention, the tobacco seeds to be screened are placed into the feeding bin 210. By rotating the feeding handle 213 or starting the feeding motor 214, the feeding shaft 211 is rotated. The feeding shaft 211 drives the partition plate 212 to rotate, so that the tobacco seeds to be screened are fed one compartment at a time. The feeding speed can be controlled by adjusting the rotation speed. At the same time, batch-separated feeding can prevent excessive feeding at one time from causing poor screening effect or even damage to the equipment. The tobacco seeds to be screened fall onto the screen 411 through the feed hopper 210. The drive motor 13 starts and drives the vibrating drive wheel 318 to rotate. The vibrating drive wheel 318 drives the vibrating driven wheel 317 to rotate through the vibrating belt 320. The vibrating driven wheel 317 drives the vibrating shaft 316 to rotate, thereby driving the fixed block 321 to rotate. The rotation of the fixed block 321 drives the connecting block 322 to rotate. The rotation of the connecting block 322 drives the screen box 12 to vibrate. The tobacco seeds to be screened move forward along the screen 411. Larger impurities remain on the screen 411. Finally, the impurities fall from the left end outlet 15 under the guidance of the inclined plate 16. The tobacco seeds fall below the screen 411 and finally fall from the front end outlet 17. During the vibrating screening process, the drive motor 13 starts, and with the cooperation of the vibrating drive wheel 318, the vibrating belt 320 and the vibrating driven wheel 317, the vibrating shaft 316 rotates. The vibrating shaft 316 drives the flattening drive wheel 315 to rotate, and the flattening drive wheel 315 drives the flattening driven wheel 314 to rotate through the flattening belt 319. The flattening driven wheel 314 synchronously drives the reciprocating screw 311 to rotate. Under the limiting action of the limiting rod 310, the slider 312 slides back and forth on the reciprocating screw 311, thereby driving the flattening plate 313 to swing back and forth, so that the tobacco seeds to be screened on the screen 411 are flattened and will not accumulate and affect the screening effect. Because tobacco seeds are fine, round grains, prolonged operation can easily lead to material jamming. Therefore, after screening, the screen 411 needs to be cleaned by reverse vibration. Rotating the rotating handle 413 clockwise by 90° will cause the rear end of the rotating handle 413 to rotate and move downwards, lifting the rotating handle 413. At this time, the spring 416 is compressed. Simultaneously, the upward movement of the rotating handle 413 will drive the fixed shaft 414, fixed column 415, and locking block 417 to move upwards. The locking block 417 leaves the screen fixing groove 418 and enters the screen box fixing groove 419, unlocking the screen 411 from the screen box 12. At this point, the screen can be pulled out along the screen moving groove 412. The screen 411 is rotated 180° and then placed into the screen moving groove 412 along the screen clearance hole 410. The rotating handle 413 is rotated 90° counterclockwise, and the spring 416 drives the fixed shaft 414, fixed column 415 and locking block 417 to reset. The locking block 417 is inserted into the screen fixing groove 418 to lock. At this time, the drive motor 13 is started to drive the screen box 12 and screen 411 to vibrate for cleaning. After the reverse vibration cleaning is completed, the rotating handle 413 is rotated 90° clockwise to reset the screen 411. Then the rotating handle 413 is rotated 90° counterclockwise to lock.

[0028] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A seed screening device, comprising a vibrating screen body (1), characterized in that: It also includes an adjustable feeding mechanism (2), a synchronous spreading mechanism (3) and a clean screen reversing mechanism (4), which are respectively connected to the vibrating screen body (1); The synchronous tiling mechanism (3) includes a tiling limit follower component, a tiling function component, a tiling drive component, and a vibration power component. The tiling limit follower component and the vibration power component are both connected to the vibrating screen body (1). Multiple sets of synchronous tiling function components are connected to the tiling limit follower component. The tiling limit follower component is connected to the vibration power component. The tiling drive component is connected to the vibration power component. The vibration power component provides power for the vibration of the vibrating screen body (1) and also provides power for the tiling drive component. The tiling limit follower component and the tiling function component work together to realize the synchronous tiling function.

2. The seed screening equipment according to claim 1, characterized in that, The main body (1) of the vibrating screen includes a vibrating frame (11), a screen box (12) and a drive motor (13). The screen box (12) is connected to the vibrating frame (11). The outer shell of the drive motor (13) is fixedly connected to the vibrating frame (11). The output end of the drive motor (13) is connected to the vibration power assembly. The screen box (12) is connected to the vibration power assembly. The vibration power assembly provides power for the vibration of the screen box (12). The flat limiting driven assembly is connected to the vibrating frame (11).

3. The seed screening equipment according to claim 2, characterized in that, The tiling limit driven component includes a limit rod (310) and a reciprocating screw (311). The reciprocating screw (311) is rotatably connected to the upper support of the vibration frame (11). One end of the reciprocating screw (311) is connected to the tiling drive component. The limit rod (310) is located above the reciprocating screw (311). The limit rod (310) is fixedly connected to the upper support of the vibration frame (11). Both the limit rod (310) and the reciprocating screw (311) are connected to the synchronous tiling function component.

4. The seed screening equipment according to claim 3, characterized in that, The synchronous tiling function component includes a slider (312) and a tiling plate (313). The lower end of the slider (312) is threadedly connected to the reciprocating screw (311), and the upper end of the slider (312) is slidably connected to the limiting rod (310). The lower end of the slider (312) is fixedly connected to the tiling plate (313). The tiling plate (313) moves back and forth to tiling the seeds to be screened.

5. The seed screening equipment according to claim 3, characterized in that, The tiling drive assembly includes a tiling driven wheel (314), a tiling drive wheel (315), and a tiling belt (319). The tiling driven wheel (314) is fixedly connected to one end of the reciprocating screw (311), and the tiling drive wheel (315) is connected to the vibration power assembly. The tiling drive wheel (315) and the tiling driven wheel (314) are connected by a tiling belt (319).

6. The seed screening equipment according to claim 2, characterized in that, The adjustable feeding mechanism (2) includes a feeding bin (210), a feeding shaft (211), a partition plate (212), and a feeding drive assembly. The lower end of the feeding bin (210) is fixedly connected to the upper end of the vibrating frame (11). The feeding shaft (211) is rotatably connected to the middle of the feeding bin (210). Multiple partition plates (212) are fixedly connected to the feeding shaft (211). The partition plates (212) are arranged in a circular array along the feeding shaft (211), and the outer wall of the partition plate (212) slides against the inner wall of the feeding bin (210). The feeding drive assembly is connected to the feeding shaft (211) and is used to drive the feeding shaft (211) to rotate.

7. The seed screening equipment according to claim 2, characterized in that, The cleaning screen reversing mechanism (4) includes a screen (411) and a screen locking assembly. A left-end discharge port (15) is fixedly connected to the upper front end of the screen box (12). The left-end discharge port (15) consists of two vertical plates and a horizontal plate. The vertical plates are fixedly connected to the front and rear ends of the horizontal plate. The left end of the inclined plate (16) is fixedly connected to the vertical plate at the front end, and the right end of the inclined plate (16) is fixedly connected to the inner wall of the front end of the screen box (12). The inclined plate (16) is used to guide the material on the screen (411) to the left-end discharge port (15). The front discharge port (17) is located below the left-end discharge port (15) and the inclined plate (16). The front discharge port (17) is fixedly connected to the screen box (12) at the rear end. The front discharge port (17) consists of two vertical plates and one horizontal plate. The upper end of the horizontal plate is on the same plane as the lower inner wall of the screen box (12). The inclined plate (16) is provided with screen clearance holes (410) for the screen (411) to pass through. The inner walls on both sides of the screen box (12) are provided with screen moving grooves (412) that are slidably connected to the screen (411). Multiple sets of screen locking components are symmetrically distributed on the left and right. Each side of the screen locking components is linearly arrayed along the side wall of the screen box (12). The screen locking components are connected to the screen box (12) and the screen (411) respectively.

8. The seed screening equipment according to claim 7, characterized in that, The screen locking assembly includes a rotating handle (413), a fixed shaft (414), a fixed post (415), a spring (416), a locking block (417), and a limiting block (420). The screen (411) has screen fixing grooves (418) at both ends for sliding connection with the locking block (417). The screen box (12) has screen box fixing grooves (419) at both ends for sliding with the locking block (417) and the fixed post (415). A limiting block (420) is fixedly connected to the upper end of the screen box fixing groove (419). The limiting block (420) is used to prevent locking. The fixed block (417) is moved out of the screen box fixing groove (419). The upper end of the locking block (417) is fixedly connected to the fixed column (415). The upper end of the fixed column (415) is fixedly connected to the fixed shaft (414). The upper end of the fixed shaft (414) is rotatably connected to the rotating handle (413). The rear end of the rotating handle (413) is a vertical plane. The lower end is connected to the rear end by an arc. The spring (416) is sleeved on the fixed column (415). The upper end of the spring (416) is fixedly connected to the screen box (12). The lower end of the spring (416) is fixedly connected to the locking block (417).

Images