A rice screening device for easy classification and its use method

Abstract

The present invention relates to the field of rice screening technology, and in particular to a rice screening device that is easy to classify and a method for using the same. The rice screening device that is easy to classify comprises: a body, a feed hopper is fixedly installed on the top of the body, a discharge hopper is fixedly installed at the lower end of the body, and a screening mechanism for screening rice is provided in the body. The present invention provides a rice screening device that is easy to classify and a method for using the same, which is mainly used for classifying and screening rice by setting the screening mechanism, wherein a hole-cleaning component is set below the screening plate, and a discharge trough is set at the bottom of the screening plate to increase the flow space for broken rice. When rice blocks the screening hole, the bottom end of the rice will contact the hole-cleaning component, and the blocked screening hole is actively and intermittently cleared of rice by the hole-cleaning component.

Description

Technical Field

[0001] The present invention relates to the field of rice screening, and in particular to a rice screening device that is convenient for classification and a use method thereof. Background Art

[0002] In the process of processing paddy rice into rice, the paddy rice needs to be husked first. After husking, the rice is obtained. At this time, there may still be some impurities such as rice husks, shriveled rice grains, and gravel particles in the rice. Therefore, a screening device is needed to further screen these impurities to obtain relatively pure rice. After the impurities in the rice are screened out, some broken rice will be produced during the hulling process. Therefore, it is necessary to classify and screen the rice according to its particle size to obtain rice of the same particle size.

[0003] In the related art, some rice screening devices for classifying and screening rice are disclosed, such as publication number CN112474276A, which provides a residue auxiliary screening device for organic rice production and processing, including a box body, a shell fixedly installed on the right side of the box body, a baffle provided inside the shell, a fixed plate welded to the right side of the baffle, and a first motor fixedly installed on the top of the fixed plate.

[0004] When the rice to be sorted and screened is long and thin, there will be certain problems in directly screening the rice using the above-mentioned screening device. For example, when the long and thin rice falls onto the screening component, it may directly insert into the sieve holes on the screening mechanism, causing the sieve holes to be blocked. If the rice blockage is relatively tight, the vibration of the screening component alone cannot effectively remove it from the sieve holes. Therefore, it is necessary to provide a screening device that can actively clear out the blocked rice. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a rice screening device that is easy to classify and a method of using the same.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a rice screening device for easy classification, comprising: a body, a feed hopper fixedly mounted on the top of the body, a discharge hopper fixedly mounted on the lower end of the body, a screening mechanism for screening rice provided in the body, the screening mechanism comprising a screening plate, a hole-clearing component, and a driving component, wherein a plurality of screening holes are evenly distributed on the screening plate;

[0007] The hole cleaning component is arranged directly below the screening plate, and the distance between the screening plate and the hole cleaning component is smaller than the length of the rice grains to be screened. When rice blocks the screening holes, the lower end of the rice contacts the hole cleaning component and is automatically recognized by the hole cleaning component. The hole cleaning component automatically cleans the blocked rice in the screening holes of the upper screening plate.

[0008] The driving component is used to drive the screening plate and the hole cleaning component to reciprocate synchronously.

[0009] Preferably, a through movable slot is opened on one side of the body, the screening plate is tiltedly arranged in the body, both sides of the screening plate are slidingly connected to the inner surface of the movable slot respectively, and the inclined lower end of the screening plate is movable through the movable slot from the body.

[0010] Preferably, the hole cleaning component includes a movable seat fixedly installed on the bottom of the screening plate, both sides of the bottom of the movable seat are slidably connected to the inner surface of the movable groove, a guide plate is slidably installed between the two inner side walls of the movable seat, and the bottom wall of the movable seat is fixedly connected to the bottom of the guide plate through two first cylinders.

[0011] Preferably, the guide plate is evenly provided with gas compression grooves distributed one-to-one with the screening holes, the upper and lower ends of the side walls of the gas compression grooves are connected through a gas flow groove, one side of the gas flow groove is connected to a gas storage groove, and the end of the bottom wall of the gas storage groove away from the gas flow groove is provided with a gas discharge hole connected to the bottom of the guide plate;

[0012] The hole cleaning component also includes an injection assembly arranged in a one-to-one correspondence with the gas compression groove, and the injection assembly includes a fixed rod and a piston block slidably installed in the gas compression groove. When the guide plate is in the lowest position, the piston block just blocks the upper end of the gas flow groove. A connecting rod is fixedly installed in the middle of the bottom of the piston block, and the bottom end of the connecting rod slides through the gas compression groove to the bottom of the guide plate. A piston plate is slidably connected to the inner wall of the gas storage groove, and a support spring is fixedly connected between the piston plate and the inner wall of the gas storage groove;

[0013] The bottom end of the connecting rod is provided with a polygonal groove, the bottom end of the fixed rod is fixedly connected to the bottom wall of the movable seat, the top end of the fixed rod slides and extends into the polygonal groove, the bottom end of the connecting rod and the upper end of the fixed rod are fixedly installed with electromagnets, the two electromagnets fit together, a push rod is fixedly installed in the middle of the top of the piston block, the top of the piston block is connected to the top of the push rod through an air injection groove body, and the bottom end of the inner wall of the gas compression groove is fixedly connected with a one-way air intake valve.

[0014] Preferably, the upper end surface of the guide plate is provided with a plurality of rotating grooves corresponding to the gas compression grooves, the outer side of the push rod is rotatably sleeved with a rotating piece, the rotating piece is rotatably installed in the rotating groove, and a spiral groove is provided on the outer side of the push rod, and both sides of the rotating piece and the push rod rotation sleeve position are slidably connected between the spiral groove through a protrusion with an arc-shaped end.

[0015] Preferably, the driving component is arranged on the outside of the machine body, and the driving component includes a second cylinder and two sliding support seats, and the two sliding support seats are symmetrically fixedly installed on both sides of the machine body near the movable slot. A sliding rod slides through the sliding support seat, and the sliding rod passes through one end of the support seat and is fixedly connected to one side of the screening plate. A buffer spring is provided on the outside of the sliding rod and between the sliding support seat and the screening plate. The second cylinder is fixedly installed on the outside of the machine body through a connecting piece, and the telescopic end of the second cylinder is fixedly connected to the end of one of the sliding rods.

[0016] Preferably, the gas flow groove is set as a U-shaped structure, the polygonal groove is set as a regular hexagonal prism groove structure, the air jet groove is set as a J-shaped structure, and the rotating plate is flush with the upper surface of the guide plate.

[0017] Preferably, a material guide plate is fixedly installed between the two inner side walls of the feed hopper and is inclined from top to bottom. The lower end of the material guide plate is set near the upper end of the screening plate. A material blocking plate is slidably installed between the two opposite inner side walls of the machine body and above the lower end of the material guide plate. An adjusting turntable is threadedly connected to the top of the machine body near the position of the material blocking plate. The bottom end thread of the adjusting turntable passes through the top of the machine body and is rotatably connected to the upper end of the material blocking plate.

[0018] Preferably, a fan is fixedly installed at the lower end of the interior of the body and below the screening plate, and the outer side of the fan is connected to an impurity discharge pipe that is directly opposite to the air outlet of the fan.

[0019] A method for using a rice screening device for easy classification comprises the following steps:

[0020] S1, first add the rice that has been screened for impurities once into the feed hopper, and then guide the rice onto the screening plate through the feed hopper;

[0021] S2, the driving component then drives the screening plate and the hole cleaning component to move horizontally back and forth, thereby quickly screening the rice and separating rice particles of different sizes;

[0022] S3, during the screening process, the hole cleaning component operates to clear the rice clogged in the screening holes on the screening plate;

[0023] S4. Small rice particles fall down through the screening holes into the hole-cleaning component and are then introduced into the discharge hopper below by the hole-cleaning component. Large rice particles are guided out of the machine body by the screening plate.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The screening mechanism is mainly used for classifying and screening rice. The hole-cleaning component is arranged below the screening plate, and a discharge trough is provided at the bottom of the screening plate to increase the flow space for broken rice. When the screening holes are blocked by rice, the bottom of the rice will contact the hole-cleaning component, and the hole-cleaning component actively and intermittently clears the blocked screening holes. The timely clearing of rice is beneficial to reducing the impact of the blocked screening holes on the passage of broken rice, thereby helping the screening plate to continuously maintain the same screening effect, thereby facilitating the classification of rice.

[0026] By arranging a gas compression groove, a gas flow groove, a gas storage groove and an injection assembly, a gas compression and injection structure is formed, which is mainly used for performing a second clearing operation on clogged rice. When the guide plate moves up to push out the clogged rice, the gas in the gas compression groove can be simultaneously compressed into the gas storage groove, and the compressed gas can be quickly released before the guide plate moves up to the highest position to impact the clogged rice, thereby flushing the clogged rice out of the screening hole, which is beneficial to improving the cleaning effect of the hole cleaning component on the clogged rice and reducing the time that the rice is blocked in the screening hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The present invention provides a flowchart of a method for using a rice screening device for easy classification.

[0028] Figure 2 This is a schematic structural diagram of a rice screening device for easy classification provided by the present invention.

[0029] Figure 3 A cross-sectional view of a rice screening device for easy classification provided by the present invention.

[0030] Figure 4 for Figure 3 A partial enlarged view of area A is shown.

[0031] Figure 5 for Figure 4 A partial enlarged view of area B is shown.

[0032] Figure 6This is a schematic structural diagram of the screening mechanism provided by the present invention.

[0033] Figure 7 for Figure 6 A side view of the screening mechanism is shown.

[0034] Figure 8 This is a cross-sectional view of the movable seat and guide plate provided by the present invention.

[0035] Figure 9 This is a schematic diagram of the structure between the jet assembly and the piston block provided by the present invention.

[0036] Figure 10 This is a schematic structural diagram of the screening plate provided by the present invention.

[0037] Figure 11 This is a structural schematic diagram of the upper end of the body provided by the present invention.

[0038] In the figure: 1. Machine body; 2. Feed hopper; 3. Discharge hopper; 4. Screening mechanism; 41. Screening plate; 42. Hole cleaning component; 421. Movable seat; 422. Guide plate; 423. First cylinder; 424. Gas compression tank; 425. Jet assembly; 4251. Fixed rod; 4252. Piston block; 4253. Connecting rod; 4254. Piston plate; 4255. Support spring; 4256. Polygonal groove; 4257. Electromagnet; 4258. Ejector rod; 42510. Jet tank; 4 2511. One-way air inlet valve; 42512. Rotating plate; 42513. Spiral groove; 42514. Bump; 426. Gas flow groove; 427. Gas storage tank; 428. Air vent; 43. Driving component; 431. Second cylinder; 432. Sliding support seat; 433. Sliding rod; 434. Buffer spring; 44. Discharge trough; 45. Screening hole; 5. Movable notch; 6. Fan; 7. Impurity discharge pipe; 8. Material guide plate; 9. Material blocking plate; 10. Adjusting rotating part. DETAILED DESCRIPTION

[0039] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0040] Please refer to Figures 1 to 11A rice screening device for easy classification includes: a body 1, a feed hopper 2 is fixedly installed on the top of the body 1, a discharge hopper 3 is fixedly installed at the lower end of the body 1, a screening mechanism 4 for screening rice is provided in the body 1, the screening mechanism 4 includes a screening plate 41, a hole cleaning component 42 and a driving component 43, a plurality of screening holes 45 are evenly distributed on the screening plate 41, the screening plate 41 is used to screen the rice passing through by size and guide the rice out of the body 1, and the screened rice is drained to the discharge hopper 3 through the hole cleaning component 42 and finally guided out of the body 1;

[0041] The hole cleaning component 42 is arranged directly below the screening plate 41. The distance between the screening plate 41 and the hole cleaning component 42 is less than the length of the rice grains to be screened. When rice blocks the screening holes 45, the lower end of the rice contacts the hole cleaning component 42 and is automatically recognized by the hole cleaning component 42. The hole cleaning component 42 automatically cleans the rice blocking the screening holes 45 in the upper screening plate 41.

[0042] The driving component 43 is used to drive the screening plate 41 and the hole cleaning component 42 to move back and forth synchronously.

[0043] In order to solve the problem that the slender rice directly enters the sieve holes during the process of falling into the screening component, causing the sieve holes to be blocked and difficult to be cleared out, the present invention solves the above problem by providing a screening mechanism 4;

[0044] During use, the screening mechanism 4 is fed into the screening plate 41 through the feed hopper 2. The screening plate 41 and the hole-cleaning component 42 are driven by the screen driving component 43 to reciprocate horizontally, thereby screening the rice that has fallen onto the screening plate 41. If rice blocks the screening holes 45, the bottom of the rice will just come into contact with the hole-cleaning component 42. The external controller controls the hole-cleaning component 42 to operate intermittently and start clearing the rice. During the clearing process, the discharge chute 44 provides ample space for broken rice to fall off the screening plate 41, thereby not affecting the screening speed of the screening plate 41.

[0045] The screening mechanism 4 is mainly used for classifying and screening rice. The hole-cleaning component 42 is arranged below the screening plate 41, and a discharge trough 44 is provided at the bottom of the screening plate 41 for discharging broken rice. When rice blocks the screening holes 45, the bottom of the rice will contact the hole-cleaning component 42, and the hole-cleaning component 42 actively and intermittently clears the blocked screening holes 45. The timely clearing of rice is beneficial to reducing the impact of the blocked screening holes 45 on the passage of broken rice, thereby helping the screening plate 41 to continuously maintain the same screening effect, thereby facilitating the classification of rice.

[0046] As an embodiment of the present invention, a through movable slot 5 is opened on one side of the body 1, and the screening plate 41 is arranged obliquely in the body 1. The two sides of the screening plate 41 are respectively slidably connected to the inner surface of the movable slot 5, and the inclined lower end of the screening plate 41 is movable through the movable slot 5 from the body 1 to pass through.

[0047] When the driving component 43 drives the screening plate 41 to reciprocate, the movable slot 5 can limit the screening plate 41 to a certain extent, so that the screening plate 41 remains stable during movement, and the long rice that does not pass through the screening holes 45 can flow out of the machine body 1 along the screening plate 41 under the action of the movement of the screening plate 41.

[0048] As an embodiment of the present invention, the hole cleaning component 42 includes a movable seat 421 fixedly installed at the bottom of the screening plate 41, both sides of the bottom of the movable seat 421 are slidingly connected to the inner surface of the movable slot 5, and a guide plate 422 is slidingly installed between the two inner side walls of the movable seat 421, and the bottom wall of the movable seat 421 is fixedly connected to the bottom of the guide plate 422 through two first cylinders 423.

[0049] During the screening process of rice through the screening plate 41, the broken rice directly passes through the screening holes 45 and falls downward onto the guide plate 422. The guide plate 422 is in an inclined state. Under the combined action of gravity and the reciprocating motion of the guide plate 422, the broken rice can flow along the guide plate 422 and then fall into the discharge hopper 3 and finally be discharged out of the machine body 1. However, the long rice blocked in the screening holes 45 cannot fall onto the guide plate 422 normally because its length is greater than the gap between the screening plate 41 and the hole cleaning component 42. Instead, the bottom end of the long rice contacts the upper surface of the guide plate 422. At this time, the two first cylinders 423 are synchronously extended to drive the guide plate 422 along the movable seat 4 21 moves upward, thereby pushing the blocked long rice upward, so that the long rice can be squeezed out until the upper surface of the guide plate 422 is in contact with the lower surface of the screening plate 41, so as to realize the clearing operation of the blocked long rice. In the process of the guide plate 422 moving upward, the distance between the guide plate 422 and the screening plate 41 becomes smaller. Due to the existence of the discharge trough 44 and the fact that the length of the discharge trough 44 is greater than that of the guide plate 422, the guide plate 422 can extend to the lower end of the discharge trough 44. At this time, sufficient flow space is provided for the broken rice, so that the broken rice can flow out smoothly on the guide plate 422. Therefore, when the hole cleaning component 42 performs the hole cleaning operation, the flow of the broken rice will not be affected.

[0050] By providing the hole-cleaning component 42, it is mainly used to clear out the rice blocked in the screening hole 45. The movable seat 421, the guide plate 422 and the first cylinder 423 cooperate with each other, and the upward movement of the guide plate 422 is used to push out the blocked rice to realize the function of clearing out the blocked rice. In addition, due to the presence of the discharge trough 44 during the upward movement, sufficient space is provided for broken rice. When the distance between the guide plate 422 and the screening plate 41 is reduced, the normal circulation of broken rice is not affected. Therefore, the hole-cleaning component 42 has the function of automatically completing the operation of clearing out the blocked rice without affecting the screening speed of the screening plate 41, thereby better meeting the actual needs of rice classification and screening.

[0051] As an embodiment of the present invention, the guide plate 422 is provided with gas compression grooves 424 evenly distributed in a one-to-one correspondence with the screening holes 45. The upper and lower ends of the side walls of the gas compression grooves 424 are connected by a gas flow groove 426. One side of the gas flow groove 426 is connected to a gas storage groove 427. The bottom wall of the gas storage groove 427 is provided with a gas release hole 428 at one end away from the gas flow groove 426 and connected to the bottom of the guide plate 422.

[0052] The hole cleaning component 42 also includes an air jet assembly 425 arranged in a one-to-one correspondence with the gas compression groove 424. The air jet assembly 425 includes a fixed rod 4251 and a piston block 4252 slidably installed in the gas compression groove 424. When the guide plate 422 is in the lowest position, the piston block 4252 just blocks the upper end of the gas flow groove 426. A connecting rod 4253 is fixedly installed in the middle of the bottom of the piston block 4252. The bottom end of the connecting rod 4253 slides through the gas compression groove 424 to the bottom of the guide plate 422. A piston plate 4254 is slidably connected to the inner wall of the gas storage groove 427. A support spring 4255 is fixedly connected between the piston plate 4254 and the inner wall of the gas storage groove 427.

[0053] A polygonal groove 4256 is provided at the bottom end of the connecting rod 4253, the bottom end of the fixed rod 4251 is fixedly connected to the bottom wall of the movable seat 421, and the top end of the fixed rod 4251 slides and extends into the polygonal groove 4256. The bottom end of the connecting rod 4253 and the upper end of the fixed rod 4251 are fixedly installed with electromagnets 4257, and the two electromagnets 4257 fit together. A push rod 4258 is fixedly installed in the middle of the top of the piston block 4252. The top of the piston block 4252 and the top of the push rod 4258 are connected through the air injection groove 42510. The bottom end of the inner wall of the gas compression groove 424 is fixedly connected with a one-way air intake valve 42511.

[0054] When the guide plate 422 is used to push the rice upward, when the guide plate 422 pushes the rice upward to the maximum position, the rice has not completely escaped from the screening holes 45. Due to the movement of the screening plate 41, the rice may still be present in the screening holes 45. Therefore, in order to ensure that the rice can be completely escaped from the screening holes 45, the present invention further provides an air injection assembly 425.

[0055] When long rice blocks the screening hole 45, the bottom end of the long rice contacts the top end of the push rod 4258. The external controller controls the electromagnet 4257 to be energized, so that both electromagnets 4257 are energized. At the same time, the first cylinder 423 also starts to operate, which can drive the guide plate 422 to move upward. After the two electromagnets 4257 are energized, a magnetic force of attraction is generated between the connecting rod 4253 and the fixed rod 4251, so that the connecting rod 4253 and the piston block 4252 remain in a fixed connection state. During the upward movement of the guide plate 422, the positions of the connecting rod 4253 and the piston block 4252 remain unchanged.

[0056] At this time, since the piston block 4252 blocks the upper end of the gas flow groove 426, and the one-way air inlet valve 42511 can only flow in but not out, the lower end position of the gas compression groove 424 is in a closed state. Therefore, when the guide plate 422 moves upward and the piston block 4252 remains stationary, the gas in the lower end space of the gas compression groove 424 is compressed, and then the compressed gas enters the gas storage groove 427 through the gas flow groove 426. At this time, the piston plate 4254 is subjected to the force of the gas and begins to slide in the gas storage groove 427, and synchronously compresses the support spring 4255, and also follows the guide plate 422 to move upward along the outer side of the connecting rod 4253, and synchronously compresses the support spring 4255. At the same time, the gas inside the gas storage groove 427 is discharged outward from the vent hole 428 to maintain the internal air pressure balance of the gas storage groove 427.

[0057] When the guide plate 422 is about to move up to the highest position, the piston block 4252 no longer seals the upper end of the gas flow groove 426. At this time, the space at the lower end of the gas compression groove 424 is in a conductive state, and the compressed gas is quickly squeezed out when the support spring 4255 drives the piston plate 4254 to return to its original position. The squeezed gas flows from the gas flow groove 426 to the upper end of the gas compression groove 424, then enters through the jet groove 42510, and is finally ejected outward from the upper end of the piston block 4252. At this time, the blocked rice has been pushed out of the screening hole 45. The upper end of the air-jet slot 42510 is aligned with the screening hole 45, so that the extruded gas can directly act on the bottom of the rice, thereby generating an upward thrust on the rice, further ejecting the rice from the screening hole 45, thereby achieving a second cleaning operation of the rice. During the gas ejection process, the piston plate 4254 is driven to reset under the elastic force of the support spring 4255. At the same time, the piston plate 4254 generates suction, sucking the gas outside the guide plate 422 into the gas storage tank 427 through the air vent 428, so as to maintain the air pressure balance in the gas storage tank 427.

[0058] When the guide plate 422 moves downward to reset, the space at the upper end of the gas compression groove 424 gradually shrinks, while the space at the lower end gradually expands. The gas in the upper end space is directly discharged through the air injection groove 42510, while the downward movement of the guide plate 422 generates suction in the lower end space, allowing the gas outside the guide plate 422 to enter the gas compression groove 424 through the one-way air inlet valve 42511, thereby maintaining the internal air pressure balance of the gas compression groove 424.

[0059] By arranging the gas compression groove 424, the gas flow groove 426, the gas storage groove 427 and the injection assembly 425, a gas compression and injection structure is formed, which is mainly used for performing a second clearing operation on the clogged rice. In the process of the guide plate 422 moving up to push out the clogged rice, the gas in the gas compression groove 424 can be simultaneously compressed into the gas storage groove 427, and the compressed gas can be quickly released before the guide plate 422 moves up to the highest position to impact the clogged rice, thereby flushing the clogged rice out of the screening hole 45, which is beneficial to improving the cleaning effect of the hole cleaning component 42 on the clogged rice and reducing the blocking time of the rice in the screening hole 45.

[0060] As an embodiment of the present invention, the upper end surface of the guide plate 422 is provided with a plurality of rotating grooves 429 corresponding to and connected with the gas compression grooves 424. The outer side of the top rod 4258 is rotatably sleeved with a rotating piece 42512, and the rotating piece 42512 is rotatably installed in the rotating groove 429. The outer side of the top rod 4258 is provided with a spiral groove 42513. Both sides of the rotating sleeve position of the rotating piece 42512 and the top rod 4258 are slidably connected between the spiral groove 42513 through an arc-shaped protrusion 42514 at the end.

[0061] When the guide plate 422 moves upward, the distance between the guide plate 422 and the screening plate 41 is reduced. Although this does not affect the normal downward flow of the broken rice, the reduced distance will reduce the height of the broken rice. Therefore, the impact of the broken rice after falling onto the guide plate 422 is reduced, which in turn affects the flow rate of the broken rice on the guide plate 422. If the amount of broken rice is large, it will stay on the guide plate 422 for a long time, affecting its discharge speed. Therefore, the above problem is solved by further providing a push rod 4258 and a rotating piece 42512.

[0062] During the upward movement of the guide plate 422, the rotating piece 42512 will move upward along with the guide plate 422, and since the rotating piece 42512 is slidably connected to the spiral groove 42513 on the top rod 4258 through the arc-shaped protrusion 42514 at the end, when the top rod 4258 remains stationary and the rotating piece 42512 moves upward, the arc-shaped protrusion 42514 at the end will slide in the spiral groove 42513, thereby causing the rotating piece 42512 to start rotating. At this time, if broken rice falls The broken rice falls on the upper end surface of the rotating plate 42512, and the rotation of the rotating plate 42512 can generate a centrifugal force acceleration effect on the fallen broken rice, which can promote the broken rice to flow quickly on the guide plate 422, and realize the function of accelerating the flow speed of the broken rice after the falling height of the broken rice decreases, which is beneficial to reducing the impact of the lowering of the falling height of the broken rice on its flow speed, so that the flow speed of the broken rice before and after the cleaning hole is relatively stable, which is beneficial to avoid the problem of the broken rice staying on the guide plate 422 for too long.

[0063] As an embodiment of the present invention, a driving component 43 is arranged on the outside of the body 1. The driving component 43 includes a second cylinder 431 and two sliding support seats 432. The two sliding support seats 432 are symmetrically fixedly installed on both sides of the body 1 near the movable slot 5. A sliding rod 433 slides through the sliding support seat 432. The sliding rod 433 passes through one end of the support seat and is fixedly connected to one side of the screening plate 41. A buffer spring 434 is provided on the outside of the sliding rod 433 and between the sliding support seat 432 and the screening plate 41. The second cylinder 431 is fixedly installed on the outside of the body 1 through a connecting piece. The telescopic end of the second cylinder 431 is fixedly connected to the end of one of the sliding rods 433.

[0064] When the driving component 43 is used to drive the screening plate 41 and the hole cleaning component 42, the second cylinder 431 is extended and retracted, thereby driving the two sliding rods 433, the screening plate 41 and the hole cleaning component 42 to move horizontally in the movable slot 5. During this sliding process, the buffer spring 434 is squeezed, which has a certain buffering effect, and the screening plate 41 and the entire hole cleaning component 42 can reciprocate synchronously, thereby screening the rice passing through the screening plate 41.

[0065] As an embodiment of the present invention, the gas flow groove 426 is set to a U-shaped structure, the polygonal groove 4256 is set to a regular hexagonal prism groove structure, the jet groove 42510 is set to a J-shaped structure, and the rotating piece 42512 is flush with the upper surface of the guide plate 422.

[0066] One end of the connecting rod 4253 that slides with the polygonal groove 4256 is configured as a regular hexagonal prism structure, and the sliding cooperation between the two can prevent relative rotation between the connecting rod 4253 and the fixing rod 4251.

[0067] As an embodiment of the present invention, a material guide plate 8 is fixedly installed between the two inner side walls of the feed hopper 2 and is tilted from top to bottom. The lower end of the material guide plate 8 is set at an upper end position close to the screening plate 41. A material blocking plate 9 is slidably installed between the two opposite inner side walls of the body 1 and above the lower end of the material guide plate 8. An adjusting turntable 10 is threadedly connected to the top of the body 1 near the material blocking plate 9. The bottom end of the adjusting turntable 10 is threaded through the top of the body 1 and is rotatably connected to the upper end of the material blocking plate 9.

[0068] The adjustment member 10 and the blocking plate 9 are used in conjunction to adjust the rice flow rate passing through the guide plate 8. During adjustment, the adjustment member 10 is rotated to make the adjustment member 10 move in the vertical direction synchronously, and can drive the blocking plate 9 to slide on the machine body 1, thereby changing the distance between the blocking plate 9 and the guide plate 8 until the blocking plate 9 reaches the desired position. The adjustment member 10 is stopped and the adjustment member 10 and the blocking plate 9 are kept fixed.

[0069] In order to reduce the possibility of rice directly entering the screening holes 45 and causing blockage when entering the screening plate 41 from the feed hopper 2, the end of the guide plate 8 is arranged close to the upper end of the screening plate 41, which can reduce the drop of rice entering the screening plate 41, thereby reducing the compaction of rice when clogging the screening holes 45 and facilitating its subsequent removal.

[0070] As an embodiment of the present invention, a fan 6 is fixedly installed at the lower end of the interior of the body 1 and below the screening plate 41 , and an impurity discharge pipe 7 is connected to the outside of the fan 6 and is opposite to the air outlet of the fan 6 .

[0071] During the process of the classified and screened broken rice falling from the guide plate 422 to the discharge hopper 3, there may still be fine impurities in the broken rice that have not been screened out. Therefore, by further providing a fan 6, the fine impurities in the broken rice can be blown away by the wind force generated by the fan 6 during the process of the broken rice falling into the discharge hopper 3. The blown away impurities can enter the impurity discharge pipe 7 and be discharged and collected, thereby achieving a further impurity removal function for the screened broken rice.

[0072] In addition, the present invention also provides a method for using a rice screening device for easy classification, comprising the following steps:

[0073] S1, first add the rice that has been screened for impurities once into the feed hopper 2, and then guide the rice onto the screening plate 41 through the feed hopper 2;

[0074] S2, the driving component 43 then drives the screening plate 41 and the hole cleaning component 42 to move horizontally back and forth, so that the rice can be quickly screened and rice with different particle sizes can be screened out;

[0075] S3: During the screening process, the hole cleaning component 42 operates to clear the rice that is blocked in the screening holes 45 on the screening plate 41;

[0076] S4. Small rice particles fall downward through the screening holes 45 into the hole-cleaning component 42 and are then introduced into the discharge hopper 3 below by the hole-cleaning component 42. Large rice particles are guided out of the machine body 1 by the screening plate 41.

[0077] The basic principles, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only illustrate the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention as claimed, and the scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A rice screening device for easy classification, comprising: A machine body (1), wherein a feed hopper (2) is fixedly mounted on the top of the machine body (1), a discharge hopper (3) is fixedly mounted on the lower end of the machine body (1), and a screening mechanism (4) for screening rice is provided in the machine body (1), characterized in that the screening mechanism (4) comprises a screening plate (41), a hole-cleaning component (42) and a driving component (43), a discharge trough (44) is provided at the bottom of the screening plate (41), and a plurality of screening holes (45) are evenly distributed on the screening plate (41) and are in communication with the discharge trough (44); The hole-cleaning component (42) is arranged directly below the screening plate (41), and the distance between the screening plate (41) and the hole-cleaning component (42) is smaller than the length of the rice grains to be screened. When rice blocks the screening hole (45), the lower end of the rice contacts the hole-cleaning component (42) and is automatically recognized by the hole-cleaning component (42). The hole-cleaning component (42) automatically cleans the rice blocking the screening hole (45) in the upper screening plate (41); The driving component (43) is used to drive the screening plate (41) and the hole cleaning component (42) to move back and forth synchronously; A through movable notch (5) is provided on one side of the machine body (1), and the screening plate (41) is tiltedly arranged in the machine body (1). Both sides of the screening plate (41) are slidably connected to the inner surface of the movable notch (5), and the tilted lower end of the screening plate (41) is movable through the movable notch (5) from the inside of the machine body (1); The hole cleaning component (42) includes a movable seat (421) fixedly mounted on the bottom of the screening plate (41), both sides of the bottom of the movable seat (421) are slidably connected to the inner surface of the movable notch (5), a guide plate (422) is slidably mounted between the two inner side walls of the movable seat (421), and the bottom wall of the movable seat (421) is fixedly connected to the bottom of the guide plate (422) via two first cylinders (423); The guide plate (422) is evenly provided with gas compression grooves (424) distributed one-to-one with the screening holes (45), the upper and lower ends of the side walls of the gas compression grooves (424) are connected through a gas flow groove (426), one side of the gas flow groove (426) is connected to a gas storage groove (427), and the end of the bottom wall of the gas storage groove (427) away from the gas flow groove (426) is provided with a gas release hole (428) connected to the bottom of the guide plate (422); The hole cleaning component (42) further includes an injection assembly (425) arranged in a one-to-one correspondence with the gas compression groove (424), the injection assembly (425) including a fixed rod (4251) and a piston block (4252) slidably mounted in the gas compression groove (424), when the guide plate (422) is at the lowest position, the piston block (4252) just blocks the upper end of the gas flow groove (426), a connecting rod (4253) is fixedly mounted in the middle of the bottom of the piston block (4252), the bottom end of the connecting rod (4253) slides through the gas compression groove (424) to the bottom of the guide plate (422), a piston plate (4254) is slidably connected to the inner wall of the gas storage groove (427), and a support spring (4255) is fixedly connected between the piston plate (4254) and the inner wall of the gas storage groove (427); The bottom end of the connecting rod (4253) is provided with a polygonal groove (4256), the bottom end of the fixed rod (4251) is fixedly connected to the bottom wall of the movable seat (421), and the top end of the fixed rod (4251) slides and extends into the polygonal groove (4256). The bottom end of the connecting rod (4253) and the upper end of the fixed rod (4251) are both fixedly installed with electromagnets (4257), and the two electromagnets (4257) are fitted together. A push rod (4258) is fixedly installed in the middle of the top of the piston block (4252), and the top of the piston block (4252) and the top end of the push rod (4258) are connected through the air injection groove (42510). The bottom end of the inner wall of the gas compression groove (424) is fixedly connected with a one-way air intake valve (42511).

2. A rice screening device for easy classification according to claim 1, characterized in that: The upper end surface of the guide plate (422) is provided with a plurality of rotating grooves (429) corresponding to and communicating with the gas compression grooves (424); a rotating piece (42512) is rotatably sleeved on the outer side of the push rod (4258); the rotating piece (42512) is rotatably installed in the rotating groove (429); a spiral groove (42513) is provided on the outer side of the push rod (4258); both sides of the rotating sleeve position of the rotating piece (42512) and the push rod (4258) are slidably connected between the spiral groove (42513) and the arc-shaped protrusion (42514) at the end.

3. The rice screening device for easy classification according to claim 1, characterized in that: The driving component (43) is arranged on the outside of the body (1), and the driving component (43) includes a second cylinder (431) and two sliding support seats (432). The two sliding support seats (432) are symmetrically fixedly installed on both sides of the body (1) near the movable slot (5). A sliding rod (433) slides through the sliding support seat (432). One end of the sliding rod (433) passes through the support seat and is fixedly connected to one side of the screening plate (41). A buffer spring (434) is sleeved on the outside of the sliding rod (433) and located between the sliding support seat (432) and the screening plate. The second cylinder (431) is fixedly installed on the outside of the body (1) through a connecting piece. The telescopic end of the second cylinder (431) is fixedly connected to the end of one of the sliding rods (433).

4. The rice screening device for easy classification according to claim 2, characterized in that: The gas flow groove (426) is configured as a U-shaped structure, the polygonal groove (4256) is configured as a regular hexagonal prism groove structure, the air jet groove (42510) is configured as a J-shaped structure, and the rotating piece (42512) is flush with the upper surface of the guide plate (422).

5. The rice screening device for easy classification according to claim 1, characterized in that: A guide plate (8) is fixedly installed between the two inner side walls of the feed hopper (2) and is tilted from top to bottom. The lower end of the guide plate (8) is arranged near the upper end of the screening plate (41). A blocking plate (9) is slidably installed between the two opposite inner side walls of the machine body (1) and above the lower end of the guide plate (8). An adjusting rotating member (10) is threadedly connected to the top of the machine body (1) near the blocking plate (9). The bottom end of the adjusting rotating member (10) is threadedly connected to the upper end of the blocking plate (9) after passing through the top of the machine body (1).

6. The rice screening device for easy classification according to claim 1, characterized in that: A fan (6) is fixedly installed at the lower end of the interior of the machine body (1) and below the screening plate (41), and the outside of the fan (6) is connected to an impurity discharge pipe (7) that is directly opposite to the air outlet of the fan (6).

7. A method for using a rice screening device for easy classification, applicable to the rice screening device for easy classification according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1, first add the rice that has been screened for impurities once into the feed hopper (2), and then guide the rice onto the screening plate (41) through the feed hopper (2); S2, the driving component (43) then drives the screening plate (41) and the hole cleaning component (42) to move horizontally back and forth, thereby quickly screening the rice and separating rice particles of different sizes; S3, during the screening process, the hole-cleaning component (42) operates to clear the rice clogged in the screening holes (45) on the screening plate (41); S4. Small rice particles fall downward through the screening holes (45) into the hole-cleaning component (42), and are then introduced into the discharge hopper (3) below by the hole-cleaning component (42). Large rice particles are guided out of the machine body (1) by the screening plate (41).

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