Nut grading and screening device

Abstract

The utility model belongs to the technical field of nut screening, and particularly relates to a nut grading and screening device which comprises a base, two fixing plates are fixedly connected to the base, a barrel is fixedly connected between the two fixing plates, a feeding hopper is connected to the top end of the circumferential face of the barrel, and a guiding hopper is connected to the bottom end of the circumferential face of the barrel. A rotating column is rotationally mounted in the cylinder body, and a plurality of material distributing sheets are fixed on the rotating column; when the nut feeding device is used for feeding nuts, the nuts can be accurately fed into the drum screen, the feeding accuracy and uniformity are ensured, the nuts in the drum screen can be ensured to be uniformly distributed through uniform and accurate feeding, the condition of local accumulation or sparseness is avoided, the drum screen can play a better screening role, the screening efficiency is improved, and the labor intensity of workers is reduced. And meanwhile, uniform and accurate feeding can also ensure that each nut has an opportunity to be fully screened by the drum screen, so that the screening effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of nut screening technology, specifically a nut grading and screening device. Background Technology

[0002] Nuts of different sizes may have different prices and popularity in the market. By grading and sorting, nuts can be classified according to size, quality, etc., which can effectively separate nuts of different sizes and qualities to meet different subsequent processing needs.

[0003] Existing screening devices use a vibrating screen to screen nuts, removing impurities and mixed fruits of inconsistent quality;

[0004] Existing nut grading and screening devices cannot accurately and evenly feed nuts. If the nuts are not evenly distributed during feeding, the drum screen or grading device will experience local overload or idleness when processing nuts. This will not only reduce screening efficiency, but also increase equipment wear and energy consumption. Furthermore, if the feeding is uneven, some nuts will not be fully screened, thus affecting the screening effect. Therefore, a nut grading and screening device is proposed to address the above problems. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology and solve the problems mentioned in the background, this utility model proposes a nut grading and sorting device.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A nut grading and sorting device of this utility model includes a base, on which two fixed plates are fixedly connected, and a cylinder is fixedly connected between the two fixed plates. A feeding hopper is connected to the top of the circumferential surface of the cylinder, and a guide hopper is connected to the bottom of the circumferential surface of the cylinder. A rotating column is rotatably installed inside the cylinder, and multiple distributing plates are fixed on the rotating column. A first motor is installed on one of the fixed plates, and the output end of the first motor is connected to one end of the rotating column. When feeding, the first motor is started, causing the rotating column to drive the distributing plates to rotate. When the openings of two distributing plates rotate to the level of the feeding hopper... When the openings of the feed hoppers overlap, the nuts in the feed hopper enter in an orderly manner and are distributed between the distribution plates. As the rotating column continues to rotate, the openings between the two distribution plates rotate until they overlap with the opening of the guide hopper, allowing the nuts to be fed into the drum screen through the guide hopper. This ensures that the nuts are accurately fed into the drum screen, guaranteeing the precision and uniformity of the feeding. Uniform and precise feeding ensures that the nuts are evenly distributed within the drum screen, avoiding localized accumulation or sparse distribution. This helps the drum screen to better perform its screening function and improves screening efficiency. At the same time, uniform and precise feeding also ensures that each nut has the opportunity to be fully screened by the drum screen, thereby improving the screening effect.

[0007] Preferably, the top side of the feed hopper is provided with a dust suction port, and a dust suction hood is fixedly connected to the port of the dust suction port. A connecting plate is fixed between the two fixed plates, and a debris collection box is installed on the connecting plate. A dust suction pipe is connected between the debris collection box and the dust suction hood. A negative pressure pump is installed on the side wall of the debris collection box. The input port of the negative pressure pump is connected to an air extraction pipe, and the other end of the air extraction pipe is located inside the debris collection box. The output port of the negative pressure pump is connected to an exhaust pipe. During the feeding process, the negative pressure pump is started, so that the gas in the debris collection box is extracted through the air extraction pipe and discharged through the exhaust pipe, so that the inside of the debris collection box is in a negative pressure state. This allows the debris and impurities contained in the nuts to be sucked into the debris collection box through the dust suction pipe, ensuring the cleanliness of the nuts. This makes the nuts entering the grading and screening stage cleaner, avoiding the presence of debris and impurities in the sieved nuts, thereby ensuring the overall quality of the product.

[0008] Preferably, a filter screen is installed on the inner wall of the debris collection box, and the filter screen is arranged around the port of the exhaust pipe. When using the device, by setting the filter screen, the port of the exhaust pipe can be prevented from being blocked, ensuring the normal operation of subsequent dust collection.

[0009] Preferably, the debris collection box has a discharge port at one bottom side, and two limit rails are fixedly connected to both sides of the discharge port. The two limit rails are slidably fitted with a sealing cover. When using the device, the discharge port facilitates the removal of collected debris from the debris collection box.

[0010] Preferably, a first fixed seat is fixedly connected to one top end of the base, and a second fixed seat is fixedly connected to the other top end of the base. Two rotating rods are rotatably mounted on the first and second fixed seats. Rotating wheels are installed at both ends of each rotating rod. A drum screen is mounted on the four rotating wheels. Pulleys are fitted onto the upper ends of the two rotating rods, and a conveyor belt is fitted onto the two pulleys. A support rod is fixedly connected to the side wall of the first fixed seat. A second motor is mounted on the support rod. The output end of the second motor is connected to one end of one of the rotating rods. During screening, the second motor is started, causing the rotating rods to drive the rotating wheels to rotate, which in turn drives the drum screen to rotate. This allows the nuts entering the drum screen to be screened, enabling nuts of different sizes to be effectively separated and collected.

[0011] Preferably, the drum screen is composed of multiple first connecting rods, second connecting rods and third connecting rods, and the distance between two adjacent first connecting rods is smaller than the distance between two adjacent second connecting rods, and the distance between two adjacent second connecting rods is smaller than the distance between two adjacent third connecting rods. During screening, this structural design makes it easier to effectively separate nuts of different sizes.

[0012] Preferably, a collection box is provided on the base and is located directly below the drum screen. The collection box has two partitions, dividing it into a first collection chamber, a second collection chamber, and a third collection chamber. A first discharge port, a second discharge port, and a third discharge port are sequentially provided on the side wall of the collection box. An inclined hopper is fixed between the second fixed seats and is located below the bottom port of the drum screen. When using this device, by setting up the first collection chamber, the second collection chamber, and the third collection chamber, the sieved nuts can be classified and collected.

[0013] Preferably, baffles are fixed to both sides of the top port of the collection box, and the two baffles are set on both sides of the drum screen. When using the device, by setting the baffles, the nuts screened from the drum screen can be guided to fall into the collection box, ensuring that they will not scatter outside the collection box. The design of the baffles provides a physical barrier for the collection box, preventing the nuts from jumping out of the collection box due to impact during the screening process, thereby keeping the working area clean.

[0014] The advantages of this utility model are:

[0015] 1. In this invention, during feeding, the first motor is started, causing the rotating column to drive the dividing plates to rotate. When the openings of the two dividing plates coincide with the opening of the feed hopper, the nuts in the feed hopper will enter in an orderly manner and be distributed between the dividing plates. As the rotating column continues to rotate, when the opening between the two dividing plates coincides with the opening of the guide hopper, the nuts can be fed into the drum screen through the guide hopper. This ensures that the nuts are accurately fed into the drum screen, guaranteeing the precision and uniformity of feeding. Uniform and precise feeding ensures that the nuts are evenly distributed in the drum screen, avoiding local accumulation or sparseness. This helps the drum screen to better perform its screening function and improves screening efficiency. At the same time, uniform and precise feeding also ensures that each nut has the opportunity to be fully screened by the drum screen, thereby improving the screening effect.

[0016] 2. During the feeding process, the negative pressure pump is activated to extract the gas in the debris collection box through the suction pipe and discharge it through the exhaust pipe, creating a negative pressure state inside the debris collection box. This allows the debris and impurities contained in the nuts to be sucked into the debris collection box through the suction pipe, ensuring the cleanliness of the nuts. This makes the nuts entering the grading and screening stage cleaner, preventing the nuts after screening from containing debris and impurities, thereby ensuring the overall quality of the product. Attached Figure Description

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

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the device;

[0019] Figure 2 This is a partial three-dimensional structural diagram of the device;

[0020] Figure 3 This is a first-side three-dimensional structural diagram of the feeding mechanism;

[0021] Figure 4 This is a schematic diagram of the second side view of the three-dimensional structure of the feeding mechanism;

[0022] Figure 5 This is a cross-sectional three-dimensional structural diagram of the cylinder.

[0023] Figure 6 This is a schematic diagram of the three-dimensional structure of the screening mechanism;

[0024] Figure 7 A schematic diagram of the three-dimensional structure of the collection components.

[0025] In the diagram: 1. Base; 2. Fixing plate; 3. Cylinder; 4. Feed hopper; 5. Guide hopper; 6. Rotating column; 7. Dividing plate; 8. First motor; 9. Connecting plate; 10. Debris collection box; 11. Dust hood; 12. Dust suction pipe; 13. Negative pressure pump; 14. Suction pipe; 15. Exhaust pipe; 16. Sealing cover; 17. First fixed seat; 18. Second fixed seat; 19. Rotating rod; 20. Rotating wheel; 21. Belt 21. Wheel; 22. Conveyor belt; 23. Support rod; 24. Second motor; 25. Drum screen; 26. First connecting rod; 27. Second connecting rod; 28. Third connecting rod; 29. ​​Collection box; 2901. First collection chamber; 2902. Second collection chamber; 2903. Third collection chamber; 30. Partition; 31. First discharge port; 32. Second discharge port; 33. Third discharge port; 34. Inclined hopper; 35. Baffle. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0027] Please see Figure 1-5 As shown, a nut grading and screening device includes a base 1, with two fixed plates 2 fixedly attached to the base 1. A cylinder 3 is fixed between the two fixed plates 2. A feed hopper 4 is connected to the top of the circumferential surface of the cylinder 3, and a guide hopper 5 is connected to the bottom of the circumferential surface of the cylinder 3. A rotating column 6 is rotatably installed inside the cylinder 3, and multiple distributing plates 7 are fixed on the rotating column 6. A first motor 8 is installed on one of the fixed plates 2, and the output end of the first motor 8 is connected to one end of the rotating column 6. During feeding, the nuts to be screened are put into the feed hopper 4, and the first motor 8 is started, causing the rotating column 6 to drive the distributing plates 7 to rotate. When the openings of two distributing plates 7 are rotated to coincide with the opening of the feed hopper 4, the nuts in the feed hopper 4 will enter the feed hopper 4. The nuts are fed between the two dividing plates 7, allowing them to enter and distribute orderly. As the rotating column 6 rotates continuously, the opening between the two dividing plates 7 aligns with the opening of the guide hopper 5, allowing the nuts to be fed into the drum screen 25 through the guide hopper 5. This ensures that the nuts are accurately fed into the drum screen 25, guaranteeing the precision and uniformity of the feeding. Uniform and precise feeding ensures that the nuts are evenly distributed within the drum screen 25, avoiding localized accumulation or sparse distribution. This helps the drum screen 25 to better perform its screening function and improve screening efficiency. At the same time, uniform and precise feeding also ensures that each nut has the opportunity to be fully screened by the drum screen 25, thereby improving the screening effect.

[0028] The top side of the feed hopper 5 is provided with a dust suction port, and a dust suction hood 11 is fixedly connected to the port of the dust suction port. A connecting plate 9 is fixed between the two fixed plates 2, and a debris collection box 10 is installed on the connecting plate 9. A dust suction pipe 12 connects the debris collection box 10 and the dust suction hood 11. A negative pressure pump 13 is installed on the side wall of the debris collection box 10. The input port of the negative pressure pump 13 is connected to a suction pipe 14, and the other port of the suction pipe 14 is located inside the debris collection box 10. The output port of the negative pressure pump 13 is connected to an exhaust pipe 15. A filter screen is installed on the inner wall of the debris collection box 10, and the filter screen is arranged around the port of the suction pipe 14. A discharge port is provided at the bottom of one side of the box 10. Limiting slide rails are fixed to both sides of the discharge port. The two limiting slide rails are slidably installed with sealing cover plates 16. During the feeding process, the negative pressure pump 13 is started, so that the gas in the debris collection box 10 is extracted through the air extraction pipe 14 and discharged through the exhaust pipe 15, so that the inside of the debris collection box 10 is in a negative pressure state. This allows the debris and impurities contained in the nuts to be sucked into the debris collection box 10 through the dust suction pipe 12, ensuring the cleanliness of the nuts. This makes the nuts entering the grading and screening stage cleaner, avoiding the presence of debris and impurities in the sieved nuts, thereby ensuring the overall quality of the product.

[0029] Please see Figure 6-7 As shown, a first fixed seat 17 is fixedly connected to one end of the top of the base 1, and a second fixed seat 18 is fixedly connected to the other end of the top of the base 1. Two rotating rods 19 are rotatably mounted on the first fixed seat 17 and the second fixed seat 18. Rotating wheels 20 are installed at both ends of each rotating rod 19. A drum screen 25 is mounted on the four rotating wheels 20. Pulleys 21 are fitted onto the upper ends of the two rotating rods 19. A conveyor belt 22 is fitted onto the two pulleys 21. A support rod 23 is fixedly connected to the side wall of the first fixed seat 17. A second motor 24 is mounted on the support rod 23. The output end of the second motor 24 is connected to one end of one of the rotating rods 19. When screening, the second motor 24 is started, causing the rotating rods 19 to drive the rotating wheels 20 to rotate, which in turn drives the drum screen 25 to rotate, thereby screening the nuts that enter the drum screen 25, so that nuts of different sizes can be effectively separated and classified for collection.

[0030] The drum screen 25 is composed of multiple first connecting rods 26, second connecting rods 27 and third connecting rods 28, and the distance between two adjacent first connecting rods 26 is smaller than the distance between two adjacent second connecting rods 27, and the distance between two adjacent second connecting rods 27 is smaller than the distance between two adjacent third connecting rods 28; during screening, this structural design makes it easier to effectively separate nuts of different sizes.

[0031] A collection box 29 is provided on the base 1 and is located directly below the drum screen 25. The collection box 29 is provided with two partitions 30, dividing it into a first collection chamber 2901, a second collection chamber 2902, and a third collection chamber 2903. A first discharge port 31, a second discharge port 32, and a third discharge port 33 are sequentially provided on the side wall of the collection box 29. An inclined hopper 34 is fixedly connected between the second fixed seats 18 and is located below the bottom port of the drum screen 25. When using this device, by setting the first collection chamber 2901, the second collection chamber 2902, and the third collection chamber 2903, the sieved nuts can be classified and collected.

[0032] Please see Figure 1 As shown, baffles 35 are fixed to both sides of the top port of the collection box 29, and the two baffles 35 are set on both sides of the drum screen 25. When using the device, by setting the baffles 35, the nuts screened from the drum screen 25 can be guided to fall into the collection box 29, ensuring that they will not scatter outside the collection box 29. The design of the baffles 35 provides a physical barrier for the collection box 29, preventing the nuts from jumping out of the collection box 29 due to impact during the screening process, thereby keeping the working area clean.

[0033] Working Principle: Existing nut grading and screening devices cannot accurately and evenly feed nuts. Uneven distribution of nuts during feeding can lead to localized overload or idleness in the drum screen 25 or grading device, reducing screening efficiency, increasing equipment wear and energy consumption, and causing some nuts to fail to be fully screened, thus affecting the screening effect. Therefore, a nut grading and screening device is proposed to address these problems. During feeding, the nuts to be screened are placed into the feed hopper 4. The first motor 8 is started, causing the rotating column 6 to drive the separating plates 7 to rotate. When the openings of the two separating plates 7 coincide with the opening of the feed hopper 4, the nuts in the feed hopper 4 enter between the two separating plates 7, allowing the nuts to enter and distribute orderly between them. As the rotating column 6 continues to rotate, the opening between the two separating plates 7 eventually coincides with the opening of the guide hopper 5. Nuts are fed into the drum screen 25 through the feed hopper 5, ensuring accurate and uniform feeding. This uniform and precise feeding ensures even distribution of nuts within the drum screen 25, preventing localized accumulation or sparse distribution. This helps the drum screen 25 perform its screening function better, improving screening efficiency. Furthermore, uniform and precise feeding ensures that each nut has a chance to be fully screened by the drum screen 25, thus improving the screening effect. During the feeding process, the negative pressure pump 13 is activated, drawing gas from the debris collection box 10 through the suction pipe 14 and discharging it through the exhaust pipe 15. This creates a negative pressure state inside the debris collection box 10, allowing debris and impurities contained within the nuts to be drawn into the debris collection box 10 through the suction pipe 12. This ensures the cleanliness of the nuts, making them cleaner before entering the grading and screening stage, preventing debris and impurities from remaining after screening, and thus guaranteeing the overall quality of the product.

[0034] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A nut grading and sorting device, characterized in that: The device includes a base (1), on which two fixing plates (2) are fixedly connected. A cylinder (3) is fixed between the two fixing plates (2). A feed hopper (4) is connected to the top of the circumferential surface of the cylinder (3), and a guide hopper (5) is connected to the bottom of the circumferential surface of the cylinder (3). A rotating column (6) is rotatably installed inside the cylinder (3). Multiple material distribution plates (7) are fixed on the rotating column (6). A first motor (8) is installed on one of the fixing plates (2). The output end of the first motor (8) is connected to one end of the rotating column (6). A dust suction port is opened on the top side of the guide hopper (5), and a dust suction hood (11) is fixedly connected to the port of the dust suction port. A connecting plate (9) is fixed between two fixed plates (2). A debris collection box (10) is installed on the connecting plate (9). A dust collection pipe (12) is connected between the debris collection box (10) and the dust collection hood (11). A negative pressure pump (13) is installed on the side wall of the debris collection box (10). An air extraction pipe (14) is connected to the input port of the negative pressure pump (13), and the other end of the air extraction pipe (14) is located inside the debris collection box (10). An exhaust pipe (15) is connected to the output port of the negative pressure pump (13). A filter screen is installed on the inner wall of the debris collection box (10), and the filter screen is arranged around the port of the air extraction pipe (14).

2. The nut grading and sorting device according to claim 1, characterized in that: The debris collection box (10) has a discharge port at one bottom side. Limiting slide rails are fixed on both sides of the discharge port. The two limiting slide rails are slidably fitted with a sealing cover plate (16).

3. The nut grading and sorting device according to claim 1, characterized in that: The top end of the base (1) is fixedly connected to a first fixed seat (17), and the other end of the top of the base (1) is fixedly connected to a second fixed seat (18). The first fixed seat (17) and the second fixed seat (18) are fitted with two rotating rods (19). Each rotating rod (19) has a rotating wheel (20) installed at both ends. The four rotating wheels (20) are fitted with a drum screen (25).

4. The nut grading and sorting device according to claim 3, characterized in that: The drum screen (25) is composed of multiple first connecting rods (26), second connecting rods (27) and third connecting rods (28), and the distance between two adjacent first connecting rods (26) is smaller than the distance between two adjacent second connecting rods (27), and the distance between two adjacent second connecting rods (27) is smaller than the distance between two adjacent third connecting rods (28).

5. A nut grading and sorting device according to claim 3, characterized in that: The upper ends of the two rotating rods (19) are fitted with pulleys (21), and the two pulleys (21) are fitted with a conveyor belt (22). A support rod (23) is fixed to the side wall of the first fixed seat (17), and a second motor (24) is installed on the support rod (23). The output end of the second motor (24) is connected to one end of one of the rotating rods (19).

6. The nut grading and sorting device according to claim 1, characterized in that: A collection box (29) is provided on the base (1), and the collection box (29) is located directly below the drum screen (25). Two partitions (30) are provided inside the collection box (29), which is divided into a first collection chamber (2901), a second collection chamber (2902), and a third collection chamber (2903). A first discharge port (31), a second discharge port (32), and a third discharge port (33) are sequentially opened on the side wall of the collection box (29). An inclined hopper (34) is fixed between the second fixed seats (18), and the inclined hopper (34) is located below the bottom port of the drum screen (25).

7. A nut grading and sorting device according to claim 6, characterized in that: Both sides of the top port of the collection box (29) are fixed with baffles (35), and the two baffles (35) are set on both sides of the drum screen (25).

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