Batch feeding-based multi-stage screening device for granular materials

Abstract

A batch feeding-based multi-stage screening device for granular materials, comprising a housing (1). A quantification assembly (2) is installed at the top of the housing (1), a dust removal assembly (3) is installed outside the housing (1), and an anti-blocking assembly (6) is installed inside the housing (1); the dust removal assembly (3) comprises a mounting plate (305) and a fixed column (304); the mounting plate (305) and the fixed column (304) are both fixedly connected to the outside of the housing (1), a rack plate (306) is slidably connected to the outer surface of the mounting plate (305), a movable rod (311) is fixedly connected to the bottom end of the rack plate (306), a rubber piston (312) is fixedly connected to the bottom end of the movable rod (311), and a filter box (301) is fixedly connected to the outside of the housing (1). A large amount of dust on the surface of rice grains can be adsorbed, filtered and removed by means of the dust removal assembly, thereby improving the quality of rice.

Description

Multi-stage screening device for granular materials based on batch feeding Technical Field The present invention relates to the technical field of multi-stage screening of granular materials, and specifically to a multi-stage screening device for granular materials based on batch feeding. Background Art Rice is also called "paddy rice". Before rice can be eaten, it needs to be processed. During the processing of rice, a large amount of impurities such as rice husks are often contained in the rice. The rice containing impurities will affect the quality of rice processing. Therefore, during the processing of rice, the rice containing impurities needs to be filtered through a multi-stage screening device for rice granular materials to achieve rice purification. When the traditional multi-stage screening device for rice granules is actually used, a sieve mesh is set to filter the rice to filter out the impurities contained in the rice. However, when some impurities such as rice husks are mixed among the rice, these impurities such as rice husks cannot be fully removed, resulting in a poor filtering and purification effect on the rice. At the same time, since a large amount of rice husks and dust are generated during the hulling of paddy rice on the market nowadays, a large amount of dust adheres to the surface of the processed rice, which affects both the quality and the appearance of the rice. In view of the above technical defects, a solution is proposed now. Summary of the Invention The purpose of the present invention is to provide a multi-stage screening device for granular materials based on batch feeding to solve the problems mentioned in the above background art. To achieve the above purpose, the present invention provides the following technical solution: A multi-stage screening device for granular materials based on batch feeding, including a housing. A quantitative component is installed at the top of the housing, a dust removal component is installed outside the housing, and an anti-blocking component is installed inside the housing. The dust removal component includes a mounting plate and a fixed column. Both the mounting plate and the fixed column are fixedly connected to the outside of the housing. A rack plate is slidably connected to the outer surface of the mounting plate. The bottom end of the rack plate is fixedly connected to a movable rod, and the bottom end of the movable rod is fixedly connected to a rubber piston. One side of the outside of the fixed column is communicated with an air release pipe, and the other side of the fixed column is communicated with a second connecting pipe. Check valves are installed inside both the second connecting pipe and the air release pipe. A filter box is fixedly connected to the outside of the housing. A plurality of filter meshes are fixedly connected to the inside of the filter box. One side of the filter box is communicated with a first connecting pipe, and the other end of the first connecting pipe penetrates through the outside of the housing and is fixedly connected to an air suction hood. Further, a second motor is installed on one side of the housing. The output end of the second motor is fixedly connected to an adapter rod. The end of the adapter rod far from the second motor is fixedly connected to a turntable. A driving block is fixedly connected to the eccentric position outside the turntable. One side of the housing is connected to a connecting frame through a rotating shaft. A sector gear is fixedly connected to one side of the connecting frame. Further, the metering component includes a metering tank and a first motor. The metering tank is fixedly installed at the top of the housing. A first motor is installed outside the metering tank. The output end of the first motor is fixedly connected to a driving lead screw. A moving plate is threadedly connected to the outside of the driving lead screw. Two connecting rods are fixedly connected to the outside of the moving plate. A metering groove is formed inside the metering tank. A sliding plate is slidably connected to the inner wall of the metering groove. A feeding pipe is fixedly connected to one side of the top of the metering tank. A discharging pipe is fixedly connected to one side of the bottom end of the metering tank. Control valves are installed outside both the feeding pipe and the discharging pipe. Further, the other ends of the two connecting rods are both fixedly connected to the outside of the sliding plate. The bottom end of the discharging pipe communicates with the top of the housing. The longitudinal section of the moving plate is rectangular. Further, the anti-blocking component includes two sieve meshes. One ends of the two sieve meshes are movably connected to the inner wall of the housing through bearings. A limiting groove is formed on one side of the bottom end of the sieve mesh. A limiting block is slidably connected to the inner wall of the limiting groove. Two driving rods are rotatably connected to the bottom side inside the housing through bearings. An eccentric wheel is fixedly connected to the outside of the driving rod. Two fixing plates are fixedly connected to the inner side wall of the housing. A swinging rod is slidably connected to the through hole inside the fixing plate.

[0012] Further, a butting plate is fixedly connected to the bottom end of the swinging rod. A compression spring is sleeved on the outside of the swinging rod. One end of the compression spring is fixedly connected to the outside of the fixing plate. The other end of the compression spring is fixedly connected to the top of the butting plate. The top of the swinging rod is rotatably connected to the limiting block. Further, two third synchronous wheels are fixedly connected to one side of the outside of the driving rod. A second synchronous wheel is fixedly connected to one end of the driving rod. The second synchronous wheel is connected to one of the third synchronous wheels through a second belt. The third synchronous wheel is connected to a first synchronous wheel through a first belt. The first synchronous wheel is fixedly connected to the outside of the connecting rod. Further, the sector gear is meshed with the rack plate. The driving block is slidably connected to the inside of the connecting frame. The bottom end of the housing is fixedly connected to a discharging pipe. A discharging port is formed on the outer side wall of the housing. The present invention also provides a usage method of the multi-stage sieving device for granular materials based on batch feeding, including the following steps: Step 1: Inject the rice grains to be sieved into the inside of the metering groove through the feeding pipe. After the metering groove is filled, open the control valve and start the first motor to make the driving lead screw rotate, thereby driving the moving plate to move. Under the traction force of the connecting rod, the sliding plate moves along the inner wall of the metering groove, and the rice grains in the metering groove are injected into the inside of the housing through the discharging pipe. Then, reset the sliding plate to its original position, so as to ensure that the amount input into the housing each time is constant. Step 2: The rice grains are screened through two screens with different sieve hole radii to intercept the large particle impurities in the rice grains, and finally discharged through the discharge port. The qualified rice grains are discharged through the discharge pipe. During the screening process, Motor 2 is started, and driven by the synchronous pulley 1, synchronous pulley 3, belt 2, and synchronous pulley 2, the two drive rods rotate synchronously, which in turn causes the eccentric wheel to rotate. The contact abutting plate drives the swing rod to move up and down reciprocally under the elastic force of the compression spring, causing the screen to vibrate efficiently and preventing the screen from getting blocked. Step 3: Motor 2 drives the connecting rod to rotate, which in turn causes the turntable to rotate, thereby driving the driving block to rotate. The connecting frame swings up and down under the action of the rotating shaft, and drives the rack plate engaged with it to move up and down along the outer wall of the mounting plate, thereby driving the movable rod and the rubber piston to move synchronously. When the rubber piston moves upward, the fixed column is in a negative pressure state, and the dust attached to the rice grains is sucked into the interior of the filter box through the suction hood for centralized collection, ensuring that a large amount of dust does not adhere to the surface of the processed rice. Compared with the prior art, the beneficial effects of the present invention are as follows: 1. When the present invention is in use, through the mutual cooperation of structures such as the one-way valve, movable rod, rubber piston, air release pipe, connecting rod, sector gear, and filter screen, a large amount of dust on the outer surface of the rice can be adsorbed, filtered, and removed, ensuring that a large amount of dust does not adhere to the surface of the processed rice, improving the quality of the rice, and at the same time enhancing the aesthetics during the rice production process. 2. When the present invention is in use, through the mutual cooperation of structures such as the limiting groove, limiting block, swing rod, fixed plate, and eccentric wheel, the screen can be vibrated at a high frequency, effectively cleaning the debris in the sieve holes of the screen, making it unblocked and maintaining good screening performance. At the same time, a quantitative component is also set, and through the mutual cooperation of the quantitative components, the material flow rate of each stage can be controlled, enabling batch feeding, further improving the screening effect, and reasonably adjusting to ensure the residence time of the material on different-level screens, making the screening result more accurate and ideal. Description of the Drawings For the convenience of those skilled in the art to understand, the present invention will be further described below with reference to the accompanying drawings. Figure 1 is a three-dimensional view of the overall structure of the present invention; Figure 2 is a schematic diagram of the structure of the mounting plate in the present invention; Figure 3 is a cross-sectional view of the structure of the housing in the present invention; Figure 4 is an enlarged view of area A in Figure 1; Figure 5 is an enlarged view of area B in Figure 3; Figure 6 is an enlarged view of area C in Figure 3; Figure 7 is a sectional view of the fixed column structure in the present invention. Reference numerals: 1, housing; 2, metering assembly; 201, metering tank; 202, feed pipe; 203, discharge pipe; 204, motor 1; 205, driving lead screw; 206, moving plate; 207, connecting rod; 208, metering groove; 209, sliding plate; 3, dust removal assembly; 301, filter box; 302, connecting pipe 1; 303, connecting pipe 2; 304, fixed column; 305, mounting plate; 306, rack plate; 307, turntable; 308, driving block; 309, connecting frame; 310, check valve; 311, movable rod; 312, rubber piston; 313, exhaust pipe; 314, connecting rod; 315, suction hood; 316, motor 2; 317, sector gear; 318, filter screen; 4, synchronous pulley 1; 5, belt 1; 6, anti-blocking assembly; 601, sieve; 602, limiting groove; 603, limiting block; 604, swing rod; 605, fixing plate; 606, eccentric wheel; 607, driving rod; 608, compression spring; 609, abutting plate; 7, synchronous pulley 2; 8, belt 2; 9, synchronous pulley 3; 10, discharge pipe; 11, discharge port. Detailed implementation manners The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Embodiment As shown in FIGS. 1-7, a multi-stage screening device for granular materials based on batch feeding includes a housing 1. A metering assembly 2 is installed on the top of the housing 1, a dust removal assembly 3 is installed outside the housing 1, and an anti-blocking assembly 6 is installed inside the housing 1. The dust removal assembly 3 includes a mounting plate 305 and a fixed column 304. The mounting plate 305 and the fixed column 304 are both fixedly connected to the outside of the housing 1. A rack plate 306 is slidably connected to the outer surface of the mounting plate 305. The bottom end of the rack plate 306 is fixedly connected to a movable rod 311, and the bottom end of the movable rod 311 is fixedly connected to a rubber piston 312; One side of the outside of the fixed column 304 is communicated with an exhaust pipe 313, and the other side of the fixed column 304 is communicated with a connecting pipe 2 303. Check valves 310 are installed inside both the connecting pipe 2 303 and the exhaust pipe 313. A filter box 301 is fixedly connected to the outside of the housing 1. A plurality of filter screens 318 are fixedly connected to the inside of the filter box 301. One side of the filter box 301 is communicated with a connecting pipe 1 302, and the other end of the connecting pipe 1 302 penetrates through the outside of the housing 1 and is fixedly connected to a suction hood 315. On one side of the housing 1, a second motor 316 is installed. The output end of the second motor 316 is fixedly connected to a connecting rod 314. One end of the connecting rod 314 away from the second motor 316 is fixedly connected to a turntable 307. An eccentric position on the outside of the turntable 307 is fixedly connected to a driving block 308. One side of the housing 1 is connected to a connecting frame 309 through a rotating shaft. One side of the connecting frame 309 is fixedly connected to a sector gear 317.

[0036] Specifically, when the second motor 316 rotates, it will drive the connecting rod 314 to rotate, and further cause the turntable 307 to rotate, thereby driving the driving block 308 to rotate, causing the connecting frame 309 to swing up and down under the action of the rotating shaft, and driving the rack plate 306 engaged with it to move up and down along the outer wall of the mounting plate 305, thereby driving the movable rod 311 and the rubber piston 312 to move synchronously. When the rubber piston 312 moves upward, the fixed column 304 is in a negative pressure state, and the dust attached to the rice grains is sucked into the interior of the filter box 301 through the suction hood 315 for centralized collection, ensuring that a large amount of dust does not adhere to the surface of the processed rice, improving the quality of the rice, and at the same time improving the aesthetics during the rice production process. Embodiment As shown in FIGS. 1 and 5, the metering assembly 2 includes a metering box 201. The metering box 201 is fixedly installed on the top of the housing 1. A first motor 204 is installed outside the metering box 201. The output end of the first motor 204 is fixedly connected to a driving lead screw 205. A moving plate 206 is threadedly connected to the outside of the driving lead screw 205. Two connecting rods 207 are fixedly connected to the outside of the moving plate 206. A metering groove 208 is provided inside the metering box 201. A sliding plate 209 is slidably connected to the inner wall of the metering groove 208. A feeding pipe 202 is fixedly connected to one side of the top of the metering box 201. A discharging pipe 203 is fixedly connected to one side of the bottom end of the metering box 201. Control valves are installed outside both the feeding pipe 202 and the discharging pipe 203. The longitudinal section of the moving plate 206 is rectangular, and the outer surface of the moving plate 206 fits against the inner wall of the metering box 201. The other ends of the two connecting rods 207 are both fixedly connected to the outside of the sliding plate 209. The bottom end of the discharging pipe 203 is communicated with the top of the housing 1. During specific setting, close the control valve outside the discharging pipe 203, and then inject the sieved rice grains into the interior of the metering tank 208 through the feeding pipe 202. After the metering tank 208 is filled, open the control valve. At this time, start the first motor 204 to rotate the driving lead screw 205, thereby driving the moving plate 206 to move along the outer wall of the driving lead screw 205. Under the traction of the connecting rod 207, the sliding plate 209 moves along the inner wall of the metering tank 208, and injects the rice grains inside the metering tank 208 into the interior of the housing 1 through the discharging pipe 203. Then reset the sliding plate 209 to its original position, which can ensure that the amount input into the housing 1 each time is constant. When it is necessary to adjust the size of the rice grain input amount, only the initial position of the sliding plate 209 needs to be changed, thereby realizing the control of the material flow rate at each level, making it discharge in batches, further improving the screening effect of the grains, and reasonably adjusting to ensure the residence time of the material on the sieve meshes 601 at different levels, making the screening result more accurate and ideal. When the longitudinal section of the moving plate 206 is set as a rectangle and the outer surface of the moving plate 206 fits against the inner wall of the metering box 201, when the moving plate 206 can move, it can move along the inner wall of the metering tank 208 without rotating, ensuring that the moving plate 206 can move normally. Embodiment As shown in FIG. 6, the anti-blocking assembly 6 includes two sieve meshes 601. One end of each of the two sieve meshes 601 is movably connected to the inner wall of the housing 1 through a bearing. A limiting groove 602 is formed on one side of the bottom end of the sieve mesh 601, and a limiting block 603 is slidably connected to the inner wall of the limiting groove 602. Two driving rods 607 are rotatably connected to the bottom side inside the housing 1 through bearings. An eccentric wheel 606 is fixedly connected to the outside of the driving rod 607. Two fixing plates 605 are fixedly connected to the inner side wall of the housing 1. A swing rod 604 is slidably connected to the through hole inside the fixing plate 605. A contact plate 609 is fixedly connected to the bottom end of the swing rod 604. A compression spring 608 is sleeved on the outside of the swing rod 604. One end of the compression spring 608 is fixedly connected to the outside of the fixing plate 605, and the other end of the compression spring 608 is fixedly connected to the top of the contact plate 609. The outer surface of the contact plate 609 is in contact with the outer surface of the eccentric wheel 606. The top of the swing rod 604 is rotatably connected to the limiting block 603. During specific setting, when the two driving rods 607 rotate synchronously and further cause the eccentric wheel 606 to rotate, when the eccentric wheel 606 swings to the highest point, the compression spring 608 is in a compressed state at this time, driving the swing rod 604 to move upward, enabling the limit block 603 to move along the inner wall of the limit groove 602, causing the screen 601 to swing upward. When the eccentric wheel 606 swings to the lowest point, the abutting plate 609 in contact with it drives the swing rod 604 to move downward under the elastic force of the compression spring 608, causing the screen 601 to vibrate efficiently, preventing the screen 601 from getting blocked, thereby enabling high-frequency vibration of the screen 601, effectively cleaning the debris in the screen holes of the screen 601, making it unobstructed again, and maintaining good screening performance. On the outer side of one side of the lower driving rod 607, two synchronizing wheels III 9 are fixedly connected. One end of the upper driving rod 607 is fixedly connected with a synchronizing wheel II 7. The outside of the synchronizing wheel II 7 is connected to the outside of one of the synchronizing wheels III 9 through a second belt 8. The outside of the synchronizing wheel III 9 is connected with a synchronizing wheel I 4 through a first belt 5. The synchronizing wheel I 4 is fixedly connected to the outside of the connecting rod 314.

[0044] During specific setting, when the synchronizing wheel I 4 rotates, it drives the first belt 5 to rotate, and further causes the two synchronizing wheels III 9 to rotate. At this time, under the action of the second belt 8, the synchronizing wheel II 7 rotates, thus driving the two driving rods 607 to rotate synchronously. The outer side of the sector gear 317 is meshed and connected with the outer side of the rack plate 306. The driving block 308 is slidably connected inside the connecting frame 309. The bottom end of the housing 1 is fixedly connected with a discharge pipe 10. A discharge port 11 is provided on the outer wall of the housing 1. When the sector gear 317 swings, the rack plate 306 moves up and down, and the rice filtered by the screen 601 is discharged from the discharge port 11. The above content is only an example and description of the structure of the present invention. Those skilled in the art of this technology can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, as long as they do not deviate from the structure of the invention or exceed the scope defined by this claim book, they should all fall within the protection scope of the present invention. In the description of this specification, the description referring to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in a suitable manner in any one or more embodiments or examples. The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only the specific embodiments. Obviously, according to the content of this specification, many modifications and variations can be made. These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A multi-stage screening device for particulate materials based on batch feeding, comprising a housing (1), characterized in that: A quantitative component (2) is installed on the top of the shell (1), a dust removal component (3) is installed on the outside of the shell (1), and an anti-blocking component (6) is installed inside the shell (1); the dust removal component (3) comprises a mounting plate (305) and a fixing column (304); the mounting plate (305) and the fixing column (304) are both fixedly connected to the outside of the shell (1); a rack plate (306) is slidably connected to the outer surface of the mounting plate (305); a movable rod (311) is fixedly connected to the bottom end of the rack plate (306); and a rubber piston (312) is fixedly connected to the bottom end of the movable rod (311); One side of the outside of the fixed column (304) is connected to a vent pipe (313), and the other side of the fixed column (304) is connected to a second connecting pipe (303). Both the second connecting pipe (303) and the vent pipe (313) are provided with a one-way valve (310). The outside of the shell (1) is fixedly connected to a filter box (301), and the inside of the filter box (301) is fixedly connected to a plurality of filter screens (318). One side of the filter box (301) is connected to a first connecting pipe (302), and the other end of the first connecting pipe (302) passes through the outside of the shell (1) and is fixedly connected to an air intake hood (315).

2. The multi-stage screening device for particulate materials based on batch feeding according to claim 1 is characterized in that: A second motor (316) is installed on one side of the housing (1); an output end of the second motor (316) is fixedly connected to a connecting rod (314); an end of the connecting rod (314) away from the second motor (316) is fixedly connected to a rotating disk (307); a driving block (308) is fixedly connected to an external eccentric portion of the rotating disk (307); a connecting frame (309) is connected to one side of the housing (1) via a rotating shaft; a sector gear (317) is fixedly connected to one side of the connecting frame (309).

3. The multi-stage screening device for particulate materials based on batch feeding according to claim 1, characterized in that: The quantitative component (2) comprises a quantitative box (201) and a motor (204); the quantitative box (201) is fixedly mounted on the top of the housing (1); the motor (204) is mounted on the outside of the quantitative box (201); the output end of the motor (204) is fixedly connected to a driving screw (205); the outside of the driving screw (205) is threadedly connected to a moving plate (206); the outside of the moving plate (206) is fixedly connected to two connecting rods (207); a quantitative groove (208) is provided inside the quantitative box (201); the inner wall of the quantitative groove (208) is slidably connected to a sliding plate (209); a feed pipe (202) is fixedly connected to one side of the top of the quantitative box (201); a discharge pipe (203) is fixedly connected to one side of the bottom of the quantitative box (201); and control valves are mounted on the outside of the feed pipe (202) and the discharge pipe (203).

4. The multi-stage screening device for particulate materials based on batch feeding according to claim 3 is characterized in that: The other ends of the two connecting rods (207) are fixedly connected to the outside of the sliding plate (209), the bottom end of the discharge pipe (203) is connected to the top of the shell (1), and the longitudinal section of the movable plate (206) is set to be rectangular.

5. The multi-stage screening device for particulate materials based on batch feeding according to claim 1, characterized in that: The anti-blocking component (6) comprises two screens (601), one end of each of the two screens (601) is movably mounted on the inner wall of the housing (1) via a bearing, a limiting groove (602) is provided on one side of the bottom end of each screen (601), the inner wall of the limiting groove (602) is slidably connected to a limiting block (603), the inner bottom side of the housing (1) is movably connected to two driving rods (607) via a bearing, the outside of the driving rods (607) is fixedly connected to an eccentric wheel (606), the inner side wall of the housing (1) is fixedly connected to two fixing plates (605), and a swinging rod (604) is slidably connected to the internal through hole of the fixing plate (605).

6. The multi-stage screening device for particulate materials based on batch feeding according to claim 5, characterized in that: The bottom end of the swing rod (604) is fixedly connected to an abutment plate (609), the outside of the swing rod (604) is sleeved with a compression spring (608), one end of the compression spring (608) is fixedly connected to the outside of the fixed plate (605), and the other end of the compression spring (608) is fixedly connected to the top of the abutment plate (609), and the top of the swing rod (604) is rotatably connected to the limit block (603).

7. The multi-stage screening device for particulate materials based on batch feeding according to claim 5, characterized in that: Two synchronous wheels three (9) are fixedly connected to one side of the outside of the driving rod (607), and one end of the driving rod (607) is fixedly connected to a synchronous wheel two (7), and the synchronous wheel two (7) is connected to one of the synchronous wheels three (9) through a belt two (8), and the synchronous wheel three (9) is connected to a synchronous wheel one (4) through a belt one (5), and the synchronous wheel one (4) is fixedly connected to the end of the connecting rod (314).

8. The multi-stage screening device for particulate materials based on batch feeding according to claim 2, characterized in that: The sector gear (317) is meshingly connected with the rack plate (306), the driving block (308) is slidably connected inside the connecting frame (309), the bottom end of the shell (1) is fixedly connected with a discharge pipe (10), and the outer side wall of the shell (1) is provided with a discharge port (11).

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