A screening device with corn grade sorting function

Abstract

The present application belongs to the technical field of screening equipment, and particularly relates to a screening device with corn grade separation function, which comprises a screening box body, a feeding device is arranged on the upper end face of the screening box body, a storage box is arranged on the lower end face of the screening box body, a main shaft is arranged on the central axis of the screening box body, the main shaft is rotatably connected to the feeding device and the storage box, a screening rotating drum device is fixedly installed on the main shaft, a screening fixed cylinder device is fixedly connected in the screening box body, a quantitative disc device is arranged below the screening fixed cylinder device, and the quantitative disc device is fixedly connected to the main shaft. The screening fixed cylinder device is arranged in the screening box body, cooperates with the screening rotating drum device and the quantitative disc device, and can screen out corn kernels with the same volume but different weights under the driving of the main shaft. The device has simple and reliable structure, good screening effect, greatly improved overall quality of screened corn, and improved and ensured quality of corn flour.

Description

Technical Field

[0001] This invention belongs to the field of screening equipment technology, specifically relating to a screening device with corn grade sorting function. Background Technology

[0002] Corn is an important food and feed crop, and a major raw material for industrial alcohol and other chemical products. Its planting area and total output are second only to rice and wheat. Because it is rich in nutrients such as protein, fat, vitamins, trace elements, and fiber, it has been developed into a wide variety of food products, including instant corn flour. In corn flour production, the corn kernels must be screened and impurities removed before grinding to ensure the quality of the final product. However, most existing corn screening and impurity removal devices use filter screens or filter cylinders for sorting and impurity removal. Essentially, they use mesh to separate corn kernels of different sizes; impurities and smaller kernels pass through the screen, while kernels of the required size are retained, thus achieving sorting and impurity removal.

[0003] However, the size of corn kernels does not fully represent their quality. In reality, corn may be damaged by insects during drying and storage, causing the kernels to become hollow and destroying their core nutrients, while their size remains unchanged. Traditional sieving methods struggle to separate these relatively large, hollowed-out kernels. Using corn from these conditions significantly reduces the quality and nutritional value of the corn flour, hindering its competitiveness. Therefore, further sieving is necessary to select the highest quality corn and ensure the quality of the corn flour.

[0004] Therefore, in view of the above-mentioned shortcomings, this application proposes a screening device with corn grade sorting function that can effectively solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a screening device with corn grade sorting function, thereby effectively solving the problems existing in the prior art.

[0006] To achieve the above objectives, the specific technical solution of the present invention is as follows:

[0007] A screening device with corn grade sorting function includes a screening box body. A feeding device is provided at the center of the upper end face of the screening box body, and a storage box is provided at the center of the lower end face of the screening box body. A main shaft is provided on the central axis of the screening box body. The upper and lower ends of the main shaft are rotatably connected to the feeding device and the storage box respectively through mounting flanges. A screening rotary drum device is fixedly installed on the main shaft. A screening stationary drum device is fixedly connected inside the screening box body. The screening rotary drum device is located inside the screening stationary drum device and the two are coaxial. A metering disc device is provided below the screening stationary drum device and the metering disc device is fixedly connected to the main shaft.

[0008] As a further provision of the above scheme, the feeding device includes a feeding cylinder, which is fixedly installed on the upper surface of the screening box. A conveying auger is provided on the central axis of the feeding cylinder and is fixedly connected to the main shaft. A drive motor is fixedly connected to the upper plate of the feeding cylinder and is connected to the main shaft for transmission. A feed pipe device is provided on the side of the feeding cylinder. The drive motor drives the conveying auger to rotate through the main shaft, adding corn from the feed pipe device into the feeding cylinder. The conveying auger transports the corn downwards in a uniform and quantitative manner.

[0009] As a further provision of the above scheme, a first discharge device is provided on the bottom plate of the storage box, and a second discharge device is provided on the screening box body. The second discharge device is connected to the space between the screening box body and the screening cylinder device, and the corn between the screening box body and the screening cylinder device can be discharged through the second discharge device.

[0010] As a further provision of the above scheme, the screening drum device includes a screening drum, on the upper surface of which a guide plate is fixedly connected. The guide plate is a truncated cone structure facing upwards, and a vertically downward mounting sleeve is fixedly connected to the center of the bottom of the guide plate. The mounting sleeve is fixedly connected to the main shaft, and a vacuum pump device is fixedly connected to the outer surface of the mounting sleeve.

[0011] As a further feature of the above scheme, vertical transition grooves are evenly distributed around the outer wall of the screening drum. A guide ring is installed inside the transition groove and is fixedly connected to the screening drum. The guide ring is also slidably connected to the screening stationary device. Suction cups are evenly arranged linearly in the transition groove and are connected to a negative pressure valve. The negative pressure valve is fixedly connected to the inner wall of the screening drum and is connected to a vacuum pump device through an air pipe. The vacuum pump device, in conjunction with the negative pressure valve and the air pipe, generates a negative pressure airflow at the suction cups, creating a pressure difference between the inside and outside of the transition groove.

[0012] As a further provision of the above scheme, the screening cylinder device includes a screening cylinder with a first material passage groove evenly distributed circumferentially on it. The first material passage groove penetrates the screening cylinder in both vertical and horizontal directions and connects the inner and outer walls of the screening cylinder. An upper stop block is provided at the upper end of the first material passage groove, and a lower guide block is provided at the lower end of the first material passage groove. The first material passage groove corresponds one-to-one with the transition groove. A second material passage groove evenly distributed circumferentially on the screening cylinder is also provided. The second material passage groove is evenly staggered with the first material passage groove and corresponds one-to-one with the transition groove. The second material passage groove vertically penetrates the inner wall of the screening cylinder.

[0013] As a further feature of the above scheme, a sliding groove is provided on the inner wall of the screening cylinder, and the sliding groove corresponds one-to-one with the position of the guide ring, and the sliding groove is slidably connected to the guide ring.

[0014] As a further feature of the above scheme, the quantitative disc device includes a mounting platform, which is fixedly mounted on the main shaft. The outer wall of the mounting platform is provided with spokes that radiate outwards evenly. A quantitative ring is fixedly connected to the spokes. The quantitative ring is coaxial with the mounting platform. The upper end face of the quantitative ring slides in contact with the lower end face of the screening cylinder. The quantitative ring has uniformly opened material passage holes, which correspond one-to-one with the second material passage groove. When the quantitative disc device rotates with the main shaft, the material passage holes and the second material passage groove periodically overlap and intersect, controlling the amount of corn kernels passing through the second material passage groove.

[0015] The beneficial effects of this invention are:

[0016] When this device is in operation, the drive motor and vacuum pump are first started. The drive motor drives the main shaft to rotate, and the conveying auger, metering disc, and screening drum, which are fixedly connected to the main shaft, rotate synchronously. The screening drum remains stationary. The screening drum and the screening drum rotate relative to each other. The transition trough successively coincides with the first and second feed troughs. When the transition trough coincides with the first feed trough, the feed hole coincides with the second feed trough. The vacuum pump, in conjunction with the negative pressure valve and air pipe, generates a negative pressure airflow at the suction cup. A pressure difference exists inside and outside the transition trough, and corn is added to the feeding cylinder through the feed pipe. The conveying auger transports the corn downwards in a uniform and quantitative manner. The corn detaches from the conveying auger and falls downwards onto the guide plate. Guided by the guide plate, it enters the second feed trough. The corn moves vertically downwards in the second feed trough. Under the obstruction of the metering ring, the corn is evenly arranged in a line in the second feed trough. When the transition trough overlaps with the second material passage trough, the transition trough effectively expands the space of the second material passage trough. Simultaneously, as the guide ring enters the second material passage trough, the corn kernels are individually separated between the guide rings, avoiding squeezing interference between the corn kernels. Due to the negative pressure airflow near the suction cup, the pressure difference draws the lighter corn kernels into the transition trough, while the heavier corn kernels are not attracted and remain in the second material passage trough. The screening drum continues to rotate, and the suction cup and transition trough drive the lighter corn kernels to move. When the transition trough overlaps with the first material passage trough, the vacuum pump stops, the suction force of the suction cup disappears, and the lighter corn kernels detach from the suction cup and transition trough, passing downward through the first material passage trough into the space between the screening box and the screening cylinder device. The material passage hole overlaps with the second material passage trough, while the heavier corn kernels fall downward into the storage box, thus achieving the screening of the corn.

[0017] This invention, by setting a screening cylinder device inside the screening box, in conjunction with a screening rotary cylinder device and a quantitative disc device, can screen out corn kernels of the same volume but different weights under the drive of the main shaft. This device has a simple and reliable structure, good screening effect, and greatly improves the overall quality of the screened corn, thus enhancing the quality of the corn flour. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the appearance of the present invention;

[0019] Figure 2 This is an isometric view of the cross-section of the present invention;

[0020] Figure 3 This is a schematic diagram of the screening mechanism of the present invention;

[0021] Figure 4 This is a schematic cross-sectional view of the screening drum device of the present invention;

[0022] Figure 5 This is a schematic diagram of the external appearance of the screening rotary drum device of the present invention;

[0023] Figure 6 This is a schematic diagram of the external appearance of the screening cylinder device of the present invention;

[0024] Figure 7 This is a schematic cross-sectional view of the screening cylinder device of the present invention;

[0025] Figure 8 This is a schematic diagram of the quantitative disc device of the present invention.

[0026] 1. Screening box body; 2. Main shaft; 3. Screening rotary drum device; 4. Screening fixed drum device; 5. Feeding device; 6. Feed pipe device; 7. Drive motor; 8. Mounting flange; 9. Storage box; 10. Quantitative disc device; 11. First discharge device; 12. Second discharge device; 301. Screening rotary drum; 302. Guide top plate; 303. Mounting sleeve; 304. Vacuum pump device; 305. Transition groove; 3 051, Guide ring; 3052, Suction cup; 306, Negative pressure valve; 307, Air pipe; 401, Screening cylinder; 402, First feed chute; 4021, Upper stop block; 4022, Lower guide block; 403, Second feed chute; 404, Slide chute; 501, Feeding cylinder; 502, Conveying auger; 1001, Mounting platform; 1002, Spokes; 1003, Quantitative ring; 1004, Feeding hole. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The following will refer to the appendix... Figures 1-8 This application will be described in detail with reference to the embodiments.

[0029] like Figure 1 , Figure 2 , Figure 3As shown, this embodiment discloses a screening device with corn grade sorting function. A feeding device 5 is located at the center of the upper end face of the screening box 1, and a storage box 9 is located at the center of the lower end face of the screening box 1. A main shaft 2 is located on the central axis of the screening box 1. The upper and lower ends of the main shaft 2 are rotatably connected to the feeding device 5 and the storage box 9 respectively via mounting flanges 8. A screening rotary drum device 3 is fixedly installed on the main shaft 2. A screening stationary drum device 4 is fixedly connected inside the screening box 1. The screening rotary drum device 3 is located inside the screening stationary drum device 4 and the two are coaxial. A quantitative disc device 10 is located below the screening stationary drum device 4 and is fixedly connected to the main shaft 2. The feeding device 5 includes a feeding cylinder 501, which is fixedly installed on the upper end face of the screening box 1 for feeding. A conveying auger 502 is provided on the central axis of the cylinder 501. The conveying auger 502 is fixedly connected to the main shaft 2. A drive motor 7 is fixedly connected to the upper plate of the feeding cylinder 501. The drive motor 7 is connected to the main shaft 2 for transmission. A feed pipe device 6 is provided on the side of the feeding cylinder 501. The drive motor 7 drives the conveying auger 502 to rotate through the main shaft 2, adding corn from the feed pipe device 6 into the feeding cylinder 501. The conveying auger 502 transports the corn downwards in a uniform and quantitative manner. A first discharge device 11 is provided on the bottom plate of the storage box 9. A second discharge device 12 is provided on the screening box body 1. The second discharge device 12 is connected to the space between the screening box body 1 and the screening cylinder device 4. The corn between the screening box body 1 and the screening cylinder device 4 can be discharged through the second discharge device 12.

[0030] like Figure 4 , Figure 5 As shown, the screening drum device 3 includes a screening drum 301. A guide plate 302 is fixedly connected to the upper surface of the screening drum 301. The guide plate 302 is a truncated cone structure facing upwards. A vertically downward mounting sleeve 303 is fixedly connected to the center of the bottom of the guide plate 302. The mounting sleeve 303 is fixedly connected to the main shaft 2. A vacuum pump device 304 is fixedly connected to the outer surface of the mounting sleeve 303. Vertical grooves are evenly opened around the circumference of the outer wall of the screening drum 301. The transition trough 305 contains a guide ring 3051, which is fixedly connected to the screening drum 301. The guide ring 3051 is also slidably connected to the screening stationary drum 4. The transition trough 305 is uniformly provided with linearly arranged suction cups 3052, which are connected to a negative pressure valve 306. The negative pressure valve 306 is fixedly connected to the inner wall of the screening drum 301 and is connected to a vacuum pump device 304 through an air pipe 307.

[0031] like Figure 6 , Figure 7As shown, the screening cylinder device 4 includes a screening cylinder 401. The screening cylinder 401 has a first material passage 402 evenly distributed around its circumference. The first material passage 402 penetrates the screening cylinder 401 in both vertical and horizontal directions, connecting the inner and outer walls of the screening cylinder 401. An upper stop block 4021 is provided at the upper end of the first material passage 402, and a lower guide block 4022 is provided at the lower end of the first material passage 402. The first material passage 402 connects with the transition groove 305. One-to-one correspondence, the screening cylinder 401 has a second material passage 403 evenly distributed in a circular pattern. The second material passage 403 is evenly staggered with the first material passage 402. The second material passage 403 corresponds one-to-one with the transition groove 305. The second material passage 403 vertically penetrates the inner wall of the screening cylinder 401. The inner wall of the screening cylinder 401 has a sliding groove 404. The sliding groove 404 corresponds one-to-one with the guide ring 3051. The sliding groove 404 and the guide ring 3051 are slidably connected.

[0032] like Figure 8 As shown, the quantitative disc device 10 includes a mounting platform 1001, which is fixedly mounted on the main shaft 2. The outer wall of the mounting platform 1001 is provided with spokes 1002 that radiate outwards evenly. A quantitative ring 1003 is fixedly connected to the spokes 1002. The quantitative ring 1003 is coaxial with the mounting platform 1001. The upper end face of the quantitative ring 1003 slides in contact with the lower end face of the screening cylinder 401. The quantitative ring 1003 has uniformly opened material passage holes 1004, which correspond one-to-one with the second material passage groove 403. When the quantitative disc device 10 rotates with the main shaft 2, the material passage holes 1004 and the second material passage groove 403 periodically overlap and intersect, controlling the amount of corn kernels passing through the second material passage groove 403.

[0033] The working principle of this invention is as follows: The drive motor 7 and vacuum pump device 304 are started. The drive motor 7 drives the main shaft 2 to rotate. The conveying auger 502, the metering disc device 10, and the screening drum 301, which are fixedly connected to the main shaft 2, rotate synchronously. The screening drum device 4 remains stationary. The screening drum 301 and the screening drum 401 maintain relative rotation. The transition groove 305 successively overlaps with the first material passage groove 402 and the second material passage groove 403. When the transition groove 305 overlaps with the first material passage groove 402, the material passage hole 1004 overlaps with the second material passage groove 403. Vacuum pump device 304, in conjunction with negative pressure valve 306 and air pipe 307, generates negative pressure airflow at suction cup 3052. A pressure difference exists inside and outside transition groove 305, allowing corn to be added from feed pipe device 6 into feeding cylinder 501. Conveying auger 502 transports the corn downwards in a uniform and quantitative manner. The corn detaches from conveying auger 502 and falls onto guide plate 302, entering the second feeding trough 403 under its guidance. The corn moves vertically downwards in the second feeding trough 403, and is evenly arranged in a line under the obstruction of quantitative ring 1003. Within the second feeding trough 403, when the transition trough 305 overlaps with the second feeding trough 403, the transition trough 305 effectively expands the space of the second feeding trough 403. Simultaneously, as the guide ring 3051 enters the second feeding trough 403, the corn kernels are individually separated between the guide rings 3051, preventing squeezing and interference between the kernels. Due to the negative pressure airflow near the suction cup 3052, the pressure difference draws lighter corn kernels into the transition trough 305, while heavier kernels remain unattracted in the second feeding trough. Inside the feed trough 403, the screening drum 301 continues to rotate. The suction cup 3052 and the transition trough 305 drive the lighter corn kernels to move. When the transition trough 305 coincides with the first feed trough 402, the vacuum pump device 304 stops, the suction of the suction cup 3052 disappears, and the lighter corn kernels detach from the suction cup 3052 and the transition trough 305, pass downward through the first feed trough 402 and enter the space between the screening box 1 and the screening cylinder device 4. The feed hole 1004 coincides with the second feed trough 403, and the heavier corn kernels fall downward into the storage box 9.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A screening device with corn grade sorting function, comprising a screening box body, characterized in that, A feeding device is provided at the center of the upper end face of the screening box, and a storage box is provided at the center of the lower end face of the screening box. A main shaft is provided on the central axis of the screening box. The upper and lower ends of the main shaft are rotatably connected to the feeding device and the storage box respectively through mounting flanges. A screening rotary drum device is fixedly installed on the main shaft. A screening stationary drum device is fixedly connected inside the screening box. The screening rotary drum device is located inside the screening stationary drum device and the two are coaxial. A quantitative disc device is provided below the screening stationary drum device and the quantitative disc device is fixedly connected to the main shaft. The screening drum device includes a screening drum, a guide plate fixedly connected to the upper surface of the screening drum, the guide plate being a positively upward frustum structure, a vertically downward mounting sleeve fixedly connected to the center of the bottom of the guide plate, the mounting sleeve being fixedly connected to the main shaft, a vacuum pump device fixedly connected to the outer surface of the mounting sleeve, vertical transition grooves evenly opened around the circumference of the outer wall of the screening drum, a guide ring provided in the transition groove, the guide ring being fixedly connected to the screening drum, the guide ring being slidably connected to the screening stationary drum device, suction cups evenly arranged linearly in the transition groove, the suction cups being connected to a negative pressure valve, the negative pressure valve being fixedly connected to the inner wall of the screening drum, and the negative pressure valve being connected to the vacuum pump device through an air pipe; The screening cylinder device includes a screening cylinder with a first material passage groove evenly distributed around its circumference. The first material passage groove penetrates the screening cylinder in both vertical and horizontal directions and connects to the inner and outer walls of the screening cylinder. An upper stop block is provided at the upper end of the first material passage groove, and a lower guide block is provided at the lower end of the first material passage groove. The first material passage groove corresponds one-to-one with a transition groove. The screening cylinder also has a second material passage groove evenly distributed around its circumference. The second material passage groove is evenly staggered with the first material passage groove and corresponds one-to-one with a transition groove. The second material passage groove vertically penetrates the inner wall of the screening cylinder.

2. The screening device with corn grade sorting function according to claim 1, characterized in that, The feeding device includes a feeding cylinder, which is fixedly installed on the upper surface of the screening box. A conveying auger is provided on the central axis of the feeding cylinder, and the conveying auger is fixedly connected to the main shaft. A drive motor is fixedly connected to the upper plate of the feeding cylinder, and the drive motor is connected to the main shaft for transmission. A feed pipe device is provided on the side of the feeding cylinder.

3. The screening device with corn grade sorting function according to claim 1, characterized in that, A first discharge device is provided on the bottom plate of the storage box, and a second discharge device is provided on the screening box body. The second discharge device is connected to the space between the screening box body and the screening cylinder device.

4. The screening device with corn grade sorting function according to claim 1, characterized in that, The inner wall of the screening cylinder is provided with a sliding groove, which corresponds one-to-one with the position of the guide ring, and the sliding groove is slidably connected to the guide ring.

5. The screening device with corn grade sorting function according to claim 1, characterized in that, The quantitative disc device includes a mounting platform, which is fixedly mounted on the main shaft. The outer wall of the mounting platform is provided with spokes that radiate outwards evenly. A quantitative ring is fixedly connected to the spokes. The quantitative ring is coaxial with the mounting platform. The upper end face of the quantitative ring is in sliding contact with the lower end face of the screening cylinder. The quantitative ring has uniformly opened material passage holes, and each material passage hole corresponds to a second material passage groove.

Images