A grain screening sieve capable of automatically adjusting the mesh size

Abstract

The application provides a grain-warehousing screen capable of automatically adjusting screen aperture. The grain-warehousing screen capable of automatically adjusting screen aperture comprises a first rectangular frame, a first threaded hole is formed in the middle of the first rectangular frame, a first filter screen is threadedly connected to the inside of the first threaded hole, a fold row frame is fixedly installed at the bottom of the rectangular frame, and a first motor is fixedly installed at the top of the middle of the fold row frame. The grain-warehousing screen capable of automatically adjusting screen aperture provided by the application is provided with a first motor and the like at the bottom of the first rectangular frame. After the grain enters the first rectangular frame, the distribution assembly can be driven to rotate all the time. When the distribution assembly rotates, the bottom thereof can contact the top of the first filter screen, so that the grain rotates through the first filter screen. Meanwhile, when some grain is stuck in the first filter screen, the bristles at the bottom end of the distribution assembly can also brush it out of the hole, thereby avoiding that the large-diameter grain is stuck in the first filter screen and affecting the screening efficiency of the first filter screen.

Description

A grain sieve with automatically adjustable mesh size for warehousing. Technical Field

[0001] This invention relates to the field of grain storage, and in particular to a grain sieve with an automatically adjustable mesh size for grain storage. Background Technology

[0002] Warehousing usually refers to the process of transporting goods such as grains, oils, and bulk cargo to the corresponding warehouses through conveying equipment. Warehousing can be a shorthand for grains entering grain depots, or for oils entering oil tanks, etc.

[0003] After large quantities of rice, wheat, and other grains have finished drying, they need to be stored in warehouses to ensure that the grains do not overheat or become moldy during storage, thus avoiding waste. At the same time, to ensure the quality of the grains entering the warehouse, sieves are used to screen them, improving their quality.

[0004] However, existing screens have a fixed mesh size, and some larger grains may get stuck in the mesh when passing through them, causing blockage and affecting the screening of grains.

[0005] Therefore, it is necessary to provide a grain sieve with an automatically adjustable mesh size to solve the above-mentioned technical problems. Summary of the Invention

[0006] This invention provides a grain sieve with an automatically adjustable mesh size, which solves the problem that grain may get stuck in the mesh holes during use, affecting the screening of grain.

[0007] To solve the above-mentioned technical problems, the present invention provides a grain sieve with an automatically adjustable sieve aperture, comprising a first rectangular frame, a first threaded hole in the middle of the first rectangular frame, a first filter screen threadedly connected to the inside of the first threaded hole, a folding frame fixedly installed at the bottom of the rectangular frame, a first motor fixedly installed at the top of the middle of the folding frame, one end of the output shaft of the first motor being fixedly connected to a first rotating shaft via a coupling, the top end of the first rotating shaft penetrating the first filter screen and extending into the inside of the first rectangular frame, a distributing component threadedly connected to the top end of the first rotating shaft, and an adjustment component provided between the first motor and the first filter screen;

[0008] The adjustment assembly includes a toothed ring, a second filter screen is fixedly installed in the middle of the toothed ring, a first arc-shaped groove is opened on one side of the bottom of the toothed ring, a sliding groove is opened in the middle of the second filter screen, and sliders are fixedly installed on both sides of the top of the toothed ring.

[0009] Preferably, a second arc-shaped groove is provided at the bottom of the first rectangular frame and on both sides of the first threaded hole, a connecting groove is provided at one end of each of the two second arc-shaped grooves, and the top ends of the two sliders extend into the interior of the second arc-shaped groove.

[0010] Preferably, a second motor is fixedly installed on one side of the first rectangular frame, and a second rotating shaft is fixedly connected to one end of the output shaft of the second motor via a coupling. A gear is fixedly installed at the bottom end of the second rotating shaft, and the gear meshes with the gear ring.

[0011] Preferably, a bracket is fixedly installed on the bottom of the outer surface of the first rectangular frame and on one side of the gear, an electric telescopic rod is fixedly installed on one side of the bracket, a connecting block is fixedly installed at one end of the electric telescopic rod, and one end of the connecting block extends into the interior of the first arc-shaped groove.

[0012] Preferably, the dispensing assembly includes a connecting post, the bottom end of which has a second threaded hole, the top end of the first rotating shaft extends into the interior of the second threaded hole, and dispensing plates are uniformly fixedly connected to the surface of the connecting post.

[0013] Preferably, the top of the first rectangular frame is provided with an extension frame, the bottom end of the extension frame extends into the interior of the first rectangular frame, and the front and rear sides of the top of the extension frame are fixedly connected with first support plates. The top of the two first support plates are provided with grooves on opposite sides, and the top of the two first support plates is provided with a cleaning device, the bottom end of the cleaning device extends into the interior of the two grooves.

[0014] Preferably, the cleaning device includes a second rectangular frame, the bottom of which extends into the interior of the two grooves, a vacuum cleaner is fixedly installed on the top of the second rectangular frame, and a connecting opening is provided at the top and bottom of one side of the second rectangular frame. A second support plate is fixedly connected to the interior of the second rectangular frame and to one side of the two connecting openings. A filter element is provided inside the second rectangular frame and at the top of the two second support plates, and one end of each of the two filter elements extends out of the second rectangular frame through the connecting opening.

[0015] Preferably, a third support plate is fixedly installed on one side of the outer surface of the extension frame, a third motor is fixedly installed on the top of the third support plate, one end of the output shaft of the third motor is fixedly connected to a third rotating shaft through a coupling, a screening component is fixedly installed on the top of the third rotating shaft, one end of the screening component extends into the interior of the extension frame, and the bottom of the screening component is fixedly connected to the edge of the extension frame.

[0016] Preferably, the screening component includes a third rectangular frame, the bottom of one end of the third rectangular frame is fixedly installed to the top of the third rotating shaft, a screen is fixedly installed at one end of the bottom of the third rectangular frame, a folding plate is fixedly connected to one end inside the third rectangular frame, and a material outlet is opened at the bottom of both the front and rear ends of the folding plate.

[0017] Preferably, a gathering tube is fixedly installed at the bottom of the third rectangular frame, and one end of the gathering tube passes through the extension frame and extends to the outside of the extension frame.

[0018] Compared with related technologies, the grain sieve with automatically adjustable mesh size provided by the present invention has the following beneficial effects:

[0019] This invention provides a grain sieve with an automatically adjustable mesh size. By setting a first motor at the bottom of a first rectangular frame, after the grain enters the first rectangular frame, it can drive the sorting component to rotate continuously. When the sorting component rotates, its bottom can contact the top of the first filter screen, allowing the grain to rotate through the first filter screen. At the same time, if some grain gets stuck in the first filter screen, the bristles at the bottom of the sorting component can also brush it out from the holes, preventing large-diameter grain from getting stuck in the first filter screen and affecting the screening efficiency of the first filter screen.

[0020] By setting an adjustment component at the bottom of the first rectangular frame, the electric telescopic rod extends and can drive the adjustment component to move in parallel, adjusting the size of the holes between the first and second filter screens, which is convenient for screening grains of different particle sizes. The second motor can drive the adjustment component to rotate at a small angle through gears. When some grains are stuck at the bottom of the first filter screen or in the second filter screen, the shaking of the adjustment component can also make the stuck grains fall out. Attached Figure Description

[0021] Figure 1 is a schematic diagram of the first embodiment of the grain sieve with automatically adjustable mesh size provided by the present invention.

[0022] Figure 2 is a bottom view of the structure of the first rectangular frame shown in Figure 1;

[0023] Figure 3 is an exploded view of the structure of the first rectangular frame shown in Figure 2;

[0024] Figure 4 is a top view of the adjustment component shown in Figure 3;

[0025] Figure 5 is a structural schematic diagram of the folding frame shown in Figure 2;

[0026] Figure 6 is a schematic diagram of the structure of the extension frame shown in Figure 1;

[0027] Figure 7 is an exploded view of the cleaning device shown in Figure 1;

[0028] Figure 8 is a structural schematic diagram of a second embodiment of the grain sieve with automatically adjustable mesh size provided by the present invention.

[0029] Figure 9 is a schematic diagram of the screening component shown in Figure 8.

[0030] Labels in the diagram: 1. First rectangular frame; 2. Threaded hole; 3. First filter screen; 4. Folding frame; 5. First motor; 6. First rotating shaft.

[0031] 7. Divider assembly; 71. Connecting post; 72. Threaded hole; 73. Divider plate.

[0032] 8. Second arc-shaped groove; 9. Connecting groove.

[0033] 10. Adjustment component; 101. Gear ring; 102. Second filter screen; 103. First arc groove; 104. Slide groove; 105. Sliding block.

[0034] 11. Second motor; 12. Second shaft; 13. Gear; 14. Bracket; 15. Electric telescopic rod; 16. Connecting block; 17. Extension frame; 18. First support plate; 19. Groove.

[0035] 20. Cleaning device; 201. Second rectangular frame; 202. Vacuum cleaning equipment; 203. Connecting port; 204. Second support plate; 205. Filter element.

[0036] 21. Third support plate; 22. Third motor; 23. Third rotating shaft.

[0037] 24. Screening assembly; 241. Third rectangular frame; 242. Screen; 243. Baffle plate; 244. Material inlet.

[0038] 25. Gathering tube. Detailed Implementation

[0039] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0040] First Embodiment

[0041] Please refer to Figures 1, 2, 3, 4, 5, 6, and 7. Figure 1 is a structural schematic diagram of the first embodiment of the grain sieve with automatically adjustable mesh size provided by the present invention; Figure 2 is a bottom view of the structure of the first rectangular frame shown in Figure 1; Figure 3 is an exploded view of the structure of the first rectangular frame shown in Figure 2; Figure 4 is a top view of the structure of the adjustment component shown in Figure 3; Figure 5 is a structural schematic diagram of the folding frame, etc. shown in Figure 2; Figure 6 is a structural schematic diagram of the structure of the extension frame shown in Figure 1; and Figure 7 is an exploded view of the structure of the cleaning device shown in Figure 1. A grain sieve with automatically adjustable mesh size includes a first rectangular frame 1, a first threaded hole 2 in the middle of the first rectangular frame 1, a first filter screen 3 threadedly connected inside the first threaded hole 2, a folding frame 4 fixedly installed at the bottom of the rectangular frame 1, a first motor 5 fixedly installed at the top of the middle of the folding frame 4, a first rotating shaft 6 fixedly connected to one end of the output shaft of the first motor 5 via a coupling, the top end of the first rotating shaft 6 penetrating through the first filter screen 3 and extending into the interior of the first rectangular frame 1, a distributing component 7 threadedly connected to the top end of the first rotating shaft 6, and an adjustment component 10 provided between the first motor 5 and the first filter screen 3.

[0042] The adjustment assembly 10 includes a toothed ring 101, a second filter screen 102 is fixedly installed in the middle of the toothed ring 101, a first arc-shaped groove 103 is opened on one side of the bottom of the toothed ring 101, a sliding groove 104 is opened in the middle of the second filter screen 102, and sliders 105 are fixedly installed on both sides of the top of the toothed ring 101.

[0043] It should be noted that during use, the first rectangular frame 1 is placed inside the grain storage device, and the extension frame 17 is fixed to the first rectangular frame 1 with bolts. The extension frame 17 can be fixed to the grain storage device. The first threaded hole 2 is adapted to the size of the first filter screen 3. When storing different types of grain or grains of the same type but different qualities, the first filter screen 3 in the first threaded hole 2 can be rotated off and replaced with a more suitable first filter screen 3. The folding frame 4 is welded to the bottom of the first rectangular frame 1. The cross-section of the middle of the folding frame 4 is triangular, which can prevent grain from falling onto the folding frame 4 during storage and not falling down, thus preventing grain from being damaged. To avoid waste, the first motor 5 is bolted to the middle of the folding frame 4 and connected to an external power source via a power cord. It can rotate slowly, simultaneously driving the sorting component 7 to rotate slowly, thus preventing grain from piling up in the first rectangular frame 1 and affecting the screening of the grain. The second filter screen 102 is fixed in the middle of the toothed ring 101. After rotating to a certain angle, it cooperates with the first filter screen 3, which can screen grains of the same type but different specifications entering the warehouse. This meets the needs of use when it is inconvenient to replace the first filter screen 3. The chute 104 is adapted to the size of the first rotating shaft 6, and the length of the chute 104 also restricts the distance that the adjusting component 10 can move in parallel.

[0044] In this application, a second arc-shaped groove 8 is provided at the bottom of the first rectangular frame 1 and on both the front and rear sides of the first threaded hole 2. A connecting groove 9 is provided at one end of each of the two second arc-shaped grooves 8, and the top ends of the two sliders 105 extend into the interior of the second arc-shaped groove 8.

[0045] It should be noted that the two second arc-shaped grooves 8 are evenly opened at the bottom of the first rectangular frame 1 and are adapted to the size of the slider 105, thereby stably restricting the adjustment component 10 at the bottom of the first rectangular frame 1. The two connecting grooves 9 are opened in the same direction and are connected to the two second arc-shaped grooves 8.

[0046] In this application, a second motor 11 is fixedly installed on one side of the first rectangular frame 1, and a second rotating shaft 12 is fixedly connected to one end of the output shaft of the second motor 11 via a coupling. A gear 13 is fixedly installed at the bottom end of the second rotating shaft 12, and the gear 13 meshes with the gear ring 101.

[0047] In this application, a bracket 14 is fixedly installed on the bottom of the outer surface of the first rectangular frame 1 and on one side of the gear 13. An electric telescopic rod 15 is fixedly installed on one side of the bracket 14. A connecting block 16 is fixedly installed at one end of the electric telescopic rod 15, and one end of the connecting block 16 extends into the interior of the first arc-shaped groove 103.

[0048] It should be noted that the second motor 11 is bolted to one side of the first rectangular frame 1 and is powered by the same power line as the first motor 5. It is also controlled by an external switch. The gear 13 is the driving wheel and meshes with the gear ring 101. The first motor 5 is a servo motor with a fixed rotation angle and can rotate back, thereby controlling the size of the screening holes. The electric telescopic rod 15 and the first motor 5 are controlled by the same control system. Its extension length is limited by the length of the slide 104. The connecting block 16 is adapted to the size of the first arc groove 103. When the adjusting component 10 rotates, the connecting block 16 moves inside the first arc groove 103, and the electric telescopic rod 15 is not restricted.

[0049] In this application, the dispensing assembly 7 includes a connecting post 71, the bottom end of the connecting post 71 is provided with a second threaded hole 72, the top end of the first rotating shaft 6 extends into the interior of the second threaded hole 72, and a dispensing plate 73 is uniformly fixedly connected to the surface of the connecting post 71.

[0050] It should be noted that the top of the first rotating shaft 6 is provided with a threaded groove, the second threaded hole 72 is adapted to the size of the first rotating shaft 6, and the three distributing plates 73 are evenly fixed around the outer surface of the connecting column 71. The bottom of each of the three distributing plates 73 is fixedly installed with a rubber plate. By contacting the top of the first filter screen 3 with the rubber plate, some grain stuck in the holes of the first filter screen 3 can be swept out, so as to avoid the grain from clogging the first filter screen 3 and affecting the screening of grain entering the warehouse.

[0051] In this application, the top of the first rectangular frame 1 is provided with an extension frame 17, the bottom end of the extension frame 17 extends into the interior of the first rectangular frame 1, and the front and rear sides of the top of the extension frame 17 are fixedly connected with first support plates 18. The top of the two first support plates 18 are provided with grooves 19 on opposite sides, and the top of the two first support plates 18 is provided with a cleaning device 20, the bottom end of the cleaning device 20 extends into the interior of the two grooves 19.

[0052] It should be noted that the extension frame 17 is fixed to the top of the first rectangular frame 1 by screws, etc., to increase the height of the first rectangular frame 1. Extension frames 17 of other heights can also be installed to prevent grain from splashing out after falling into the first rectangular frame 1, thus avoiding waste of grain. The two grooves 19 are in corresponding positions and correspond to the size of the bottom of the cleaning device 20. The cleaning device 20 is placed inside the grooves 19. During the process of the first support plate 18 supporting the cleaning device 20, the position of the cleaning device 20 is also constrained.

[0053] In this application, the cleaning device 20 includes a second rectangular frame 201, the bottom of which extends into the interior of the two grooves 19. A vacuum cleaner 202 is fixedly installed on the top of the second rectangular frame 201. A connecting port 203 is provided on the top and bottom of one side of the second rectangular frame 201. A second support plate 204 is fixedly connected to the interior of the second rectangular frame 201 and on one side of the two connecting ports 203. A filter element 205 is provided inside the second rectangular frame 201 and on the top of the two second support plates 204. One end of each filter element 205 extends out of the second rectangular frame 201 through the connecting port 203.

[0054] It should be noted that an air inlet is provided at the bottom of the second rectangular frame 201, the dust collection device 202 is connected to the external fan, and two connecting ports 203 are opened on one side of the second rectangular frame 201, which are adapted to the size of the filter element 205. The two filter elements 205 are replaced alternately to ensure that the surrounding air is clean when the grain is poured in.

[0055] The working principle of the grain sieve with automatically adjustable mesh size provided by this invention is as follows:

[0056] When the grain is put into the warehouse after drying or cleaning, the staff first starts the first motor 5 and the cleaning device 20. The first motor 5 drives the sorting component 7 to rotate through the first rotating shaft 6, so that the bottom of the sorting component 7 contacts the top of the first filter screen 3. The dust collection device 202 in the cleaning device 20 starts to suck in the outside air through the second rectangular frame 201. Then the staff can control the grain to be put into the first rectangular frame 1.

[0057] After the grain enters the first rectangular frame 1, the separating plate 73 continuously and slowly agitates the grain. Simultaneously, the entire first rectangular frame 1 can be shaken by an external drive device, allowing the grain to fall through the holes in the first filter screen 3 and the second filter screen 102 into the storage device. If the grain particle size is larger than the size of the holes formed between the first and second filter screens 3 and 102, the grain can continue to rotate inside the first rectangular frame 1, driven by the separating plate 73. At the end of the grain feeding process, the staff can... Larger grains can be removed and stored in other storage devices or stored directly in this storage device. When the grain size is similar to the size of the holes between the first filter screen 3 and the second filter screen 102, and the grain gets stuck between them, the bottom of the separating plate 73 during rotation can contact the top of the first filter screen 3, and the burrs connected to the bottom of the separating plate 73 can be inserted into the holes, directly pushing the grain into the storage device below, thus preventing the grain from clogging between the first filter screen 3 and the second filter screen 102 and affecting the screening of the grain entering the warehouse.

[0058] Furthermore, when grain is placed into the first rectangular frame 1, if the grain splashes upwards, it can be blocked by the extension frame 17 to prevent the grain from splashing out. At the same time, some dust will inevitably be present in the grain falling into the first rectangular frame 1. During the process of dust spreading, the cleaning device 20 can suck it in and leave the dust on the filter element 205. After the cleaning device 20 has been used for a period of time, the staff can insert one of the clean filter elements 205 into the second rectangular frame 201 through the connecting port 203, and pull out the other used filter element 205 from the connecting port 203. Depending on its usage, it can be cleaned and reused or discarded directly. During the use of the cleaning device 20, the first rectangular frame 1 will shake. During this process, the hose on the vacuum cleaner 202 can always be connected to the external equipment, and the left and right shaking of the cleaning device 20 will not cause any impact.

[0059] After a type of grain is screened and stored using a sieve, the staff can disassemble the entire sieve and install it on other storage equipment. At the same time, the second motor 11 can be started according to the size of the grain being screened. The second motor 11 drives the gear 13 to rotate slowly through the second rotating shaft 12. When the gear 13 rotates, it meshes with the gear ring 101, which can drive the entire adjustment component 10 to change the angle, so that the position of the holes on the second filter screen 102 is offset from the position on the first filter screen 3. The size of the holes between the first filter screen 3 and the second filter screen 102 changes, which can screen grains of other sizes. At the same time, if necessary, the second motor 11 can also rotate repeatedly at a small angle to prevent some grains from getting stuck between the first filter screen 3 and the second filter screen 102 and being unable to be cleaned out by the distribution component 7, thus affecting the screening of grains.

[0060] When adjusting the hole diameter at the first filter screen 3 and the second filter screen 102, the main function is to extend the electric telescopic rod 15 a short distance, so that the entire adjustment assembly 10 moves to one side. The two sliders 105 can then move along the two connecting grooves 9. The first rotating shaft 6 moves within the range of the sliding groove 104. If the first filter screen 3 cannot meet the usage requirements, the operator can first rotate the distributing assembly 7 off the top of the first rotating shaft 6, and then rotate the first filter screen 3 to remove it from the first threaded hole 2 and replace it with a first filter screen 3 for another purpose.

[0061] Compared with related technologies, the grain sieve with automatically adjustable mesh size provided by the present invention has the following beneficial effects:

[0062] By setting a first motor 5 at the bottom of the first rectangular frame 1, after the grain enters the first rectangular frame 1, it can drive the sorting component 7 to rotate continuously. When the sorting component 7 rotates, its bottom can contact the top of the first filter screen 3, so that the grain rotates through the first filter screen 3. At the same time, when some grain gets stuck in the first filter screen 3, the brush at the bottom of the sorting component 7 can also brush it out of the holes, so as to avoid large-diameter grain getting stuck in the first filter screen 3 and affecting the screening efficiency of the first filter screen 3.

[0063] By setting an adjustment component 10 at the bottom of the first rectangular frame 1, the electric telescopic rod 15 extends and can drive the adjustment component 10 to move in parallel, thereby adjusting the size of the holes between the first filter screen 3 and the second filter screen 102, which is convenient for screening grains of different particle sizes. The second motor 11 can drive the adjustment component 10 to rotate at a small angle through the gear 13. When some grains are stuck at the bottom of the first filter screen 3 or in the second filter screen 102, the shaking of the adjustment component 10 can also make the grains stuck there fall out.

[0064] Second Embodiment

[0065] Referring to Figures 8 and 9, based on the grain sieve with automatically adjustable mesh size provided in the first embodiment of this application, the second embodiment of this application proposes another grain sieve with automatically adjustable mesh size. The second embodiment is merely a preferred embodiment of the first embodiment, and its implementation will not affect the independent implementation of the first embodiment.

[0066] Specifically, the difference in the grain sieve with automatically adjustable mesh size provided in the second embodiment of this application is that a third support plate 21 is fixedly installed on one side of the outer surface of the extension frame 17, a third motor 22 is fixedly installed on the top of the third support plate 21, one end of the output shaft of the third motor 22 is fixedly connected to a third rotating shaft 23 through a coupling, a screening component 24 is fixedly installed on the top of the third rotating shaft 23, one end of the screening component 24 extends into the interior of the extension frame 17, and the bottom of the screening component 24 is fixedly connected to the edge of the extension frame 17.

[0067] It should be noted that the third support plate 21 is fixed to the outside of the extension frame 17 by bolts and is offset from the position of the first support plate 18. The third motor 22 is connected to an external power source through a power cord and is a servo motor. It rotates about 30° to 45° each time and drives the screening component 24 to swing left and right through the third rotating shaft 23, so that the grain falling from the screening component 24 into the first rectangular frame 1 can be kept dispersed, making it easier to screen the grain for storage.

[0068] In this application, the screening component 24 includes a third rectangular frame 241. The bottom of one end of the third rectangular frame 241 is fixedly installed with the top end of the third rotating shaft 23. A screen 242 is fixedly installed at one bottom end of the third rectangular frame 241. A folding plate 243 is fixedly connected to one end inside the third rectangular frame 241. Both the front and rear ends of the folding plate 243 have material outlets 244 at their bottoms.

[0069] In this application, a gathering tube 25 is fixedly installed at the bottom of the third rectangular frame 241, and one end of the gathering tube 25 passes through the extension frame 17 and extends to the outside of the extension frame 17.

[0070] It should be noted that the bottom of the third rectangular frame 241 is smooth and contacts the top of the extension frame 17, resulting in low friction. A rectangular groove is provided at one end of the third rectangular frame 241, which is adapted to the size of the screen 242. The screen 242 is placed inside the rectangular groove. After replacing the screen 242, unqualified grains with a particle size smaller than qualified grains can be screened off. The screened grains can roll down from the two feed ports 244 into the interior of the first rectangular frame 1. The top of the collecting pipe 25 discharges the unqualified grains that fall from the screen 242.

[0071] The working principle of the grain sieve with automatically adjustable mesh size provided by this invention is as follows:

[0072] When screening grain during the grain storage process, the third motor 22 is started first. The third motor 22 drives the screening component 24 to swing left and right through the third rotating shaft 23. At this time, the staff can put the grain to be stored into the third rectangular frame 241. After the grain falls into the third rectangular frame 241, as the third rectangular frame 241 swings left and right, the grain with smaller particle size mixed in can fall through the screen 242 into the collection tube 25, and then roll out from the collection tube 25 and be collected. Other grain with a particle size larger than the holes on the screen 242 touches the deflector plate 243 and can roll from the two feed ports 244 into the first rectangular frame 1 for further screening.

[0073] After screening a type of grain using a sieve, the sieve can be used to screen other varieties or types of grain. When screening other grains, the staff can remove the sieve 242 from the rectangular groove on the third rectangular frame 241 and then replace it with a sieve 242 for a different purpose.

[0074] Compared with related technologies, the grain sieve with automatically adjustable mesh size provided by the present invention has the following beneficial effects:

[0075] By setting a third motor 22 on one side of the extension frame 17 and setting a screening component 24 on the extension frame 17, the third motor 22 can drive the screening component 24 to shake left and right through the third rotating shaft 23. The grain is shaken left and right in the screening component 24. Grain with unqualified particle size can be filtered down by the screen 242 and discharged through the collection pipe 25, while qualified grain can be discharged into the first rectangular frame 1 through the two feed ports 244. The grain falls into the first rectangular frame 1 due to the uneven shaking of the screening component 24, which can screen the grain in the first rectangular frame 1 more quickly.

[0076] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A grain sieve with automatically adjustable mesh size, characterized in that, The system includes a first rectangular frame (1), a first threaded hole (2) in the middle of the first rectangular frame (1), a first filter screen (3) connected to the inside of the first threaded hole (2), a folding frame (4) fixedly installed at the bottom of the first rectangular frame (1), a first motor (5) fixedly installed at the top of the middle of the folding frame (4), a first rotating shaft (6) fixedly connected to one end of the output shaft of the first motor (5) via a coupling, the top end of the first rotating shaft (6) penetrating the first filter screen (3) and extending into the interior of the first rectangular frame (1), a distributing assembly (7) threadedly connected to the top end of the first rotating shaft (6), and an adjusting assembly (10) provided between the first motor (5) and the first filter screen (3); the adjusting assembly (10) includes a gear ring (101), a second filter screen (102) fixedly installed in the middle of the gear ring (101), and the bottom of the gear ring (101) A first arc-shaped groove (103) is provided on one side of the first rectangular frame (1), and a sliding groove (104) is provided in the middle of the second filter screen (102). Slider (105) is fixedly installed on both sides of the top of the toothed ring (101). A second motor (11) is fixedly installed on one side of the first rectangular frame (1). One end of the output shaft of the second motor (11) is fixedly connected to a second rotating shaft (12) through a coupling. A gear (13) is fixedly installed at the bottom of the second rotating shaft (12). The gear (13) meshes with the toothed ring (101). A bracket (14) is fixedly installed at the bottom of the outer surface of the first rectangular frame (1) and on one side of the gear (13). An electric telescopic rod (15) is fixedly installed on one side of the bracket (14). A connecting block (16) is fixedly installed at one end of the electric telescopic rod (15). One end of the connecting block (16) extends into the interior of the first arc-shaped groove (103).

2. The grain sieve with automatically adjustable mesh size as described in claim 1, characterized in that, The bottom of the first rectangular frame (1) and both the front and rear sides of the first threaded hole (2) are provided with second arc grooves (8), and one end of each of the two second arc grooves (8) is provided with a connecting groove (9). The tops of the two sliders (105) extend into the interior of the second arc grooves (8).

3. The grain sieve with automatically adjustable mesh size as described in claim 1, characterized in that, The dispensing assembly (7) includes a connecting post (71), the bottom end of which is provided with a second threaded hole (72), the top end of the first rotating shaft (6) extends into the interior of the second threaded hole (72), and a dispensing plate (73) is uniformly fixedly connected to the surface of the connecting post (71).

4. The grain sieve with automatically adjustable mesh size as described in claim 1, characterized in that, An extension frame (17) is provided at the top of the first rectangular frame (1). The bottom end of the extension frame (17) extends into the interior of the first rectangular frame (1). The front and rear sides of the top of the extension frame (17) are fixedly connected to the first support plate (18). The top of the two first support plates (18) are provided with grooves (19) on opposite sides. The top of the two first support plates (18) is provided with a cleaning device (20). The bottom end of the cleaning device (20) extends into the interior of the two grooves (19).

5. The grain sieve with automatically adjustable mesh size according to claim 4, characterized in that, The cleaning device (20) includes a second rectangular frame (201), the bottom of which extends into the interior of the two grooves (19). A vacuum cleaner (202) is fixedly installed on the top of the second rectangular frame (201). A connecting port (203) is provided on the top and bottom of one side of the second rectangular frame (201). A second support plate (204) is fixedly connected inside the second rectangular frame (201) and on one side of the two connecting ports (203). A filter element (205) is provided inside the second rectangular frame (201) and on the top of the two second support plates (204). One end of each of the two filters (205) passes through the connecting port (203) and extends to the outside of the second rectangular frame (201).

6. The grain sieve with automatically adjustable mesh size according to claim 4, characterized in that, A third support plate (21) is fixedly installed on one side of the outer surface of the extension frame (17). A third motor (22) is fixedly installed on the top of the third support plate (21). One end of the output shaft of the third motor (22) is fixedly connected to a third rotating shaft (23) via a coupling. A screening component (24) is fixedly installed on the top of the third rotating shaft (23). One end of the screening component (24) extends into the interior of the extension frame (17). The bottom of the screening component (24) is fixedly connected to the edge of the extension frame (17).

7. The grain sieve with automatically adjustable mesh size according to claim 6, characterized in that, The screening component (24) includes a third rectangular frame (241), the bottom of one end of the third rectangular frame (241) is fixedly installed with the top of the third rotating shaft (23), a screen (242) is fixedly installed at one end of the bottom of the third rectangular frame (241), and a folding plate (243) is fixedly connected to one end inside the third rectangular frame (241). The bottom of both the front and rear ends of the folding plate (243) are provided with material outlets (244).

8. The grain sieve with automatically adjustable mesh size according to claim 7, characterized in that, A gathering tube (25) is fixedly installed at the bottom of the third rectangular frame (241), one end of which passes through the extension frame (17) and extends to the outside of the extension frame (17).

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