A screening device for wheat variety selection

Abstract

This application relates to the field of wheat screening technology, and in particular to a screening device for wheat variety selection, comprising a pneumatic conveying tank, an inclined feeding pipe, a feeding box, a feeding assembly, a shaking assembly, and a return air pipe. The top of the pneumatic conveying tank is fixedly connected to the bottom of the inclined feeding pipe, and the inner surface of the top of the feeding box is tightly fitted to the outer wall of the bottom of the inclined feeding pipe. This wheat variety selection screening device achieves screening operations through three groups of sorting screens with progressively decreasing mesh sizes from top to bottom. Multi-stage sorting can be completed in a single operation, adapting to different varieties and particle sizes of wheat seeds, thus improving the equipment's versatility. A stepper motor drives the sorting screens to shake regularly via alloy cams. Combined with the flexible support of hinged ear plates and connecting rods, the amplitude and frequency are adjustable. The shaking intensity can be adjusted according to fragile seeds to avoid mechanical damage. The symmetrically distributed cam design ensures uniform force on the screens and prevents localized clogging.

Description

Technical Field

[0001] This application relates to the field of wheat screening technology, and in particular to a screening device for wheat variety selection. Background Technology

[0002] Screening devices for wheat variety selection are key equipment in modern agricultural breeding. In the past, wheat breeding relied on manual screening, which involved observing characteristics such as grain size, shape, and color with the naked eye, or using simple tools for preliminary grading. This method was inefficient and lacked precision.

[0003] A search revealed that CN110586481A discloses a wheat seed sorting machine, including a frame with a seed inlet at the top and a seed outlet at the bottom. Inside the frame, a first screen and a second screen are arranged from top to bottom, both inclined with the lower end of the first screen facing the upper end of the second screen. A vibrating motor is located under the first screen, connected to a cam. Springs are connected to both sides of the first screen. When the cam rotates, it drives the screen vibrator, achieving thorough removal and cleaning of impurities from the wheat surface through two-stage cleaning. This method is convenient, fast, and highly efficient, requiring no manual labor; only the cleaned impurities need to be removed. High-quality wheat is directly produced from the wheat outlet, greatly saving manpower and resources, and achieving high efficiency.

[0004] Regarding the aforementioned technologies, the inventors believe that the following technical defects exist and need to be improved: The aforementioned patent uses a sieve inside a wheat seed sorting machine to screen wheat seeds, but the aperture of the sieve in this invention is usually fixed. When it is necessary to sort wheat seeds of different varieties or sizes, its adaptability is insufficient, and it is necessary to replace it with a sorting machine of other sizes and specifications, which makes the applicability of the wheat seed sorting machine somewhat lacking; and it is not easy to maintain the seed activity during the transportation process. Utility Model Content

[0005] This application provides a screening device for wheat variety selection to improve the following technical problems: The above-mentioned wheat seed sorting machine uses a screen in the wheat seed sorting machine to screen wheat seeds, but the aperture of the screen in this invention is usually fixed. When it is necessary to sort wheat seeds of different varieties or sizes, its adaptability is insufficient, and it is necessary to replace it with a sorting machine of other sizes and specifications, which makes the applicability of the wheat seed sorting machine somewhat lacking; and it is not easy to maintain the seed activity during the transportation process.

[0006] This application provides a screening device for wheat variety breeding, which adopts the following technical solution:

[0007] A screening device for wheat variety breeding includes a pneumatic conveying tank, an inclined feeding pipe, a feeding box, a feeding assembly, a shaking assembly, and a return air pipe. The top of the pneumatic conveying tank is fixedly connected to the bottom of the inclined feeding pipe. The inner surface of the top of the feeding box is tightly fitted to the outer wall of the bottom of the inclined feeding pipe. The feeding assembly is fixedly connected to the top of the pneumatic conveying tank. The shaking assembly is rotatably connected to the inside of the feeding box. The return air pipe is installed on the outer side of the bottom of the feeding box.

[0008] In one feasible technical solution of this application, the shaking assembly includes a support shaft, a sorting screen, a stepper motor, a linear shaft, and an alloy cam. The support shaft is rotatably connected inside the feed box. The sorting screen is fixedly connected to both sides of the support shaft for sieving wheat seeds of different particle sizes. The stepper motor is installed on the bottom outer side of the feed box. The linear shaft passes through one inner wall of the feed box and is fixedly connected to one side of the alloy cam. The outer surface of the alloy cam abuts against the bottom surface of the sorting screen, and several sets of alloy cams are symmetrically distributed on both sides of the bottom of the sorting screen.

[0009] In one feasible technical solution of this application, the feeding assembly includes a feeding pipe, an exhaust fan, a hollow sleeve, a DC motor, and a cleaning roller. The hollow sleeve is welded to one side of the feeding pipe, the exhaust fan is installed on the top of the feeding pipe, the DC motor is installed on the outside of the hollow sleeve, and one end of the cleaning roller is fixedly connected to the motor shaft of the DC motor through a coupling for cleaning wheat seeds.

[0010] In one feasible technical solution of this application, the sorting screen is provided in three groups, and the mesh size of the three groups of sorting screens decreases sequentially from top to bottom.

[0011] In one feasible technical solution of this application, a hinged ear plate and a connecting rod are also installed on the opposite side of the sorting screen. The middle part of the hinged ear plate is hinged to one end of the connecting rod to support each group of sorting screens.

[0012] In one feasible technical solution of this application, a filter cover, a pull-out frame, and an activated carbon filter plate are also provided on the outside of the return gas pipe. The filter cover is welded to the outside of the return gas pipe, the pull-out frame is slidably connected to the inside of the filter cover, and the activated carbon filter plate is installed on the inside of the pull-out frame for adsorbing impurities.

[0013] In one feasible technical solution of this application, a one-way valve is also installed on the outside of the return gas pipeline.

[0014] In one feasible technical solution of this application, a high-pressure nitrogen pipeline is also installed at the bottom of the pneumatic conveying tank.

[0015] In summary, this application includes at least one of the following beneficial technical effects:

[0016] This device achieves sieving through three groups of sorting screens with progressively decreasing mesh size from top to bottom. Multi-stage sorting can be completed in a single operation, eliminating the need for frequent equipment changes. It is adaptable to different varieties and particle sizes of wheat seeds, improving equipment versatility. A stepper motor drives the sorting screens to vibrate rhythmically via alloy cams. Combined with the flexible support of hinged lugs and connecting rods, the amplitude and frequency are adjustable. The vibration intensity can be adjusted for fragile seeds to avoid mechanical damage. The symmetrically distributed cam design ensures even force on the screens, preventing localized clogging. Furthermore, this device uses airflow conveying instead of traditional mechanical conveying, reducing pressure and friction between seeds and protecting the integrity of the germ. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a screening device for wheat variety selection according to an embodiment of this application.

[0019] Figure 2 This is a schematic diagram of the feeding assembly in an embodiment of this application.

[0020] Figure 3 This is a schematic diagram of the structure of the sorting screen in the embodiments of this application.

[0021] Figure 4 This is a distribution diagram of the alloy cam in the embodiments of this application.

[0022] Figure 5 This is an exploded view of the pull-out frame and filter cover in an embodiment of this application.

[0023] Explanation of reference numerals in the attached figures:

[0024] 4. Hinge ear plate; 5. Connecting rod; 6. Filter cover; 7. Pull-out frame; 8. Activated carbon filter plate; 9. One-way valve; 10. High-pressure nitrogen pipeline; 11. Pneumatic conveying tank; 12. Inclined discharge pipe; 13. Feed box;

[0025] 15. Feeding assembly; 151. Feeding pipe; 152. Exhaust fan; 153. Hollow sleeve; 154. DC motor; 155. Cleaning roller;

[0026] 16. Shaking assembly; 161. Support shaft; 162. Sorting screen; 163. Stepper motor; 164. Linear shaft; 165. Alloy cam;

[0027] 17. Return gas pipeline. Detailed Implementation

[0028] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0029] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0030] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0032] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0033] This application discloses a screening device for wheat variety selection. (Refer to...) Figures 1 to 5 The screening device for wheat variety breeding includes a pneumatic conveying tank 11, an inclined feeding pipe 12, a feeding box 13, a feeding assembly 15, a shaking assembly 16, and a return air pipe 17. The top of the pneumatic conveying tank 11 is fixedly connected to the bottom of the inclined feeding pipe 12. The inner surface of the top of the feeding box 13 is tightly fitted to the outer wall of the bottom of the inclined feeding pipe 12. The feeding assembly 15 is fixedly connected to the top of the pneumatic conveying tank 11. The shaking assembly 16 is rotatably connected to the inside of the feeding box 13. The return air pipe 17 is installed on the outer bottom of the feeding box 13.

[0034] The shaking assembly 16 includes a support shaft 161, a sorting screen 162, a stepper motor 163, a linear shaft 164, and an alloy cam 165. The support shaft 161 is rotatably connected to the inside of the feed box 13. The sorting screen 162 is fixedly connected to both sides of the support shaft 161 for screening wheat seeds of different particle sizes. The stepper motor 163 is installed on the bottom outside of the feed box 13. The linear shaft 164 passes through one side of the inner wall of the feed box 13 and is fixedly connected to one side of the alloy cam 165. The outer surface of the alloy cam 165 abuts against the bottom surface of the sorting screen 162, and several combined alloy cams 165 are symmetrically distributed on both sides of the bottom of the sorting screen 162.

[0035] The feeding assembly 15 includes a feeding pipe 151, an exhaust fan 152, a hollow sleeve 153, a DC motor 154, and a cleaning roller 155. The hollow sleeve 153 is welded to one side of the feeding pipe 151, the exhaust fan 152 is installed on the top of the feeding pipe 151, the DC motor 154 is installed on the outside of the hollow sleeve 153, and one end of the cleaning roller 155 is fixedly connected to the motor shaft of the DC motor 154 via a coupling for cleaning wheat seeds.

[0036] The sorting screen 162 is provided in three sets, and the mesh size of the three sets of sorting screens 162 decreases from top to bottom.

[0037] On the opposite side of the sorting screen 162, there are also hinged ear plates 4 and connecting rods 5. The middle part of the hinged ear plate 4 is hinged to one end of the connecting rod 5 to support each group of sorting screens 162.

[0038] The outside of the return gas pipe 17 is also provided with a filter cover 6, a pull-out frame 7 and an activated carbon filter plate 8. The filter cover 6 is welded to the outside of the return gas pipe 17, the pull-out frame 7 is slidably connected to the inside of the filter cover 6, and the activated carbon filter plate 8 is installed on the inside of the pull-out frame 7 for adsorbing impurities.

[0039] A one-way valve 9 is also installed on the outside of the return gas pipe 17.

[0040] The bottom of the pneumatic conveying tank 11 is also equipped with a high-pressure nitrogen pipeline 10.

[0041] The usage process of the screening device for wheat variety selection in this application embodiment is roughly as follows:

[0042] High-pressure nitrogen pipeline 10 delivers high-pressure nitrogen to the pneumatic conveying tank 11, while wheat seeds are simultaneously fed in along the feed pipe 151. Before entering the pneumatic conveying tank 11, the wheat seeds pass through the hollow sleeve 153 and exhaust fan 152. At this time, DC motor 154 is started to drive cleaning roller 155. Cleaning roller 155 sweeps the wheat seeds onto another cleaning roller 155 on the other side and performs preliminary cleaning of surface impurities. Impurities inside the feed pipe 151 are discharged outside the pipe through the running exhaust fan 152, and the wheat seeds are blown into the feed box 13 along the inclined feed pipe 12 by an external fan under the action of airflow. At the same time, stepper motor 163 is started to drive alloy cam 165. The stepper motors 163 rotate at equal speeds. Since the two sets of alloy cams 165 rotate at an angle of 180° to each other, they act on the bottom sides of the sorting screen 162. The sorting screen 162 is rotatably connected to the feed box 13 through the support shaft 161. Under the cam drive, the bottom sorting screen 162 can drive the two sets of sorting screens 162 above to shake repeatedly through the connecting rod 5, and perform layered screening according to different particle sizes. On the other hand, when the one-way valve 9 is opened, the remaining impurities and nitrogen flow out outdoors through the return gas pipe 17. During this process, impurities can be adsorbed on multiple sets of activated carbon filter plates 8, while the remaining nitrogen can be fully recovered by connecting the nitrogen cylinder inlet to the outside of the pipe.

[0043] The beneficial technical effects of the screening device for wheat variety breeding in this application are roughly as follows:

[0044] This device achieves sieving operations through three groups of sorting screens 162 with progressively decreasing mesh sizes from top to bottom. Multi-stage sorting can be completed in a single operation, eliminating the need for frequent equipment changes. It is adaptable to different varieties and particle sizes of wheat seeds, improving equipment versatility. A stepper motor 163 drives the sorting screens 162 to vibrate rhythmically via alloy cams 165. Combined with the flexible support of the hinged lugs 4 and connecting rods 5, the amplitude and frequency are adjustable. The vibration intensity can be adjusted according to fragile seeds to avoid mechanical damage. The symmetrically distributed cam design ensures even force on the screens, preventing localized blockages. Furthermore, this device uses airflow conveying instead of traditional mechanical conveying, reducing friction and compression between seeds and protecting the integrity of the germ.

[0045] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A screening device for wheat variety breeding, characterized in that, The device includes a pneumatic conveying tank (11), an inclined feeding pipe (12), a feeding box (13), a feeding assembly (15), a shaking assembly (16), and a return air pipe (17). The top of the pneumatic conveying tank (11) is fixedly connected to the bottom of the inclined feeding pipe (12). The inner surface of the top of the feeding box (13) is tightly fitted to the outer wall of the bottom of the inclined feeding pipe (12). The feeding assembly (15) is fixedly connected to the top of the pneumatic conveying tank (11). The shaking assembly (16) is rotatably connected to the inside of the feeding box (13). The return air pipe (17) is installed on the outer side of the bottom of the feeding box (13).

2. The screening device for wheat variety breeding according to claim 1, characterized in that, The shaking assembly (16) includes a support shaft (161), a sorting screen (162), a stepper motor (163), a linear shaft (164), and an alloy cam (165). The support shaft (161) is rotatably connected to the inside of the feed box (13). The sorting screen (162) is fixedly connected to both sides of the support shaft (161) for screening wheat seeds of different particle sizes. The stepper motor (163) is installed on the bottom outside of the feed box (13). The linear shaft (164) passes through one side of the inner wall of the feed box (13) and is fixedly connected to one side of the alloy cam (165). The outer surface of the alloy cam (165) abuts against the bottom surface of the sorting screen (162), and several sets of alloy cams (165) are symmetrically distributed on both sides of the bottom of the sorting screen (162).

3. The screening device for wheat variety breeding according to claim 2, characterized in that, The feeding assembly (15) includes a feeding pipe (151), an exhaust fan (152), a hollow sleeve (153), a DC motor (154), and a cleaning roller (155). The hollow sleeve (153) is welded to one side of the feeding pipe (151). The exhaust fan (152) is installed on the top of the feeding pipe (151). The DC motor (154) is installed on the outside of the hollow sleeve (153). One end of the cleaning roller (155) is fixedly connected to the motor shaft of the DC motor (154) through a coupling for cleaning wheat seeds.

4. The screening device for wheat variety breeding according to claim 3, characterized in that, The sorting screen (162) is provided in three sets, and the mesh size of the three sets of sorting screens (162) decreases from top to bottom.

5. The screening device for wheat variety breeding according to claim 4, characterized in that, The sorting screen (162) is also equipped with a hinged ear plate (4) and a connecting rod (5) on the opposite side. The middle part of the hinged ear plate (4) is hinged to one end of the connecting rod (5) to support each set of sorting screens (162).

6. The screening device for wheat variety breeding according to claim 1, characterized in that, The outside of the return gas pipe (17) is also provided with a filter cover (6), a pull-out frame (7) and an activated carbon filter plate (8). The filter cover (6) is welded to the outside of the return gas pipe (17), the pull-out frame (7) is slidably connected to the inside of the filter cover (6), and the activated carbon filter plate (8) is installed on the inside of the pull-out frame (7) for adsorbing impurities.

7. The screening device for wheat variety breeding according to claim 6, characterized in that, A one-way valve (9) is also installed on the outside of the return gas pipe (17).

8. The screening device for wheat variety breeding according to claim 1, characterized in that, The bottom of the pneumatic conveying tank (11) is also equipped with a high-pressure nitrogen pipeline (10).

Images