A feed superfine material screening and impurity removing device and method

Abstract

The present application relates to the field of feed screening, in particular to a feed superfine material screening and impurity removing device and method, comprising: a through main cylinder, which is the main support frame of the device, a feeding cylinder installed on the upper end of the main cylinder and penetrating therethrough, a feeding groove opened in the middle of the feeding cylinder, a primary screening unit installed inside the feeding cylinder, a magnetic attraction unit installed on the inner wall of the main cylinder, a fine screening unit installed on the upper end of the magnetic attraction unit, a discharge groove symmetrically opened to the outside of the main cylinder and the feeding cylinder, and a plugging assembly installed in the discharge groove. By vertically integrating the primary screening unit, the fine screening unit, the magnetic attraction unit and the plugging assembly in the main cylinder and the feeding cylinder, the mode of independent operation of multiple different devices in the prior art is replaced, the feed is prevented from being exposed to the external environment at the equipment connection, the risk of feed moisture and caking is reduced, the stability of the feed quality is ensured, the equipment land occupation range is greatly reduced, and the problems of equipment dispersion and feed moisture in the prior art are solved.

Description

Technical Field

[0001] This invention relates to the field of feed screening, and in particular to a device and method for screening and removing impurities from ultrafine feed materials. Background Technology

[0002] In the field of feed production, ultrafine feed (powder) has become a core raw material for aquaculture, young livestock breeding and high-end pet food because its particle size is concentrated in 10-100μm, its specific surface area is large and it is easily digested and absorbed by animals. It can significantly improve breeding efficiency and animal health.

[0003] However, during the production of this type of feed, impurities such as metal shavings, sand particles, and plant fibers are easily mixed in. This not only reduces the palatability of the feed and causes digestive diseases in animals, but may also wear out the components of subsequent pelleting equipment. Furthermore, the existing impurity removal system requires multiple independent devices to complete the dust removal operation in stages. The connection points between the devices can easily expose the feed to the external environment, causing the feed to absorb moisture from the air and become damp and clump together, which seriously affects the stability of feed quality and storage period.

[0004] In the prior art, such as the patent with publication number CN117019647A, a raw material impurity removal device for feed production is disclosed. It includes a shell, and inside the shell, a screening section, a conveying section, an impurity removal section and a receiving section are arranged sequentially along the material conveying direction. The screening section includes a screening roller and a drying device at the feeding end, the conveying section includes a conveyor belt and an upper material distribution assembly, the impurity removal section includes a magnetic separation roller and a receiving hopper, and the receiving section includes a receiving box and a pressing device. Through the continuous process of drying, screening, material distribution and flattening, magnetic separation to remove iron, and pressing and receiving, the impurity removal and processing of powdered feed raw materials are realized.

[0005] However, although this technology improves the secondary contamination problem caused by the original step-by-step impurity removal, there are still aspects that need further optimization to better meet actual testing needs. Although the existing technology integrates various functional modules into the housing and connects them, the layout of the modules is scattered, occupying a large area; although the magnetic separation roller of the magnetic adsorption equipment works with the material distribution assembly to spread the material evenly, when the material is spread in a thin, flat layer, some fine metal impurities deeply buried inside the material may not be able to directly contact the magnetic separation roller, resulting in insufficient magnetic adsorption and difficulty in achieving the ideal metal impurity removal rate.

[0006] Therefore, based on the above-stated viewpoints, there is still room for optimization in the existing technology for removing impurities from feed raw materials. Summary of the Invention

[0007] To address the above problems, the present invention provides a device for screening and removing impurities from ultrafine feed materials, comprising: The main cylinder, which runs vertically through the body, serves as the main support frame for this device.

[0008] The feeding cylinder is installed at the top of the main cylinder and is connected to it. A feeding chute is opened in the middle of the feeding cylinder.

[0009] The primary screening unit is installed inside the feeding cylinder and is used to break up clumps of feed and screen out large impurities.

[0010] The magnetic adsorption unit is installed on the inner wall of the main cylinder to adsorb metal particles.

[0011] The fine screening unit is installed on top of the magnetic suction unit and is used to accurately screen out small impurities in the feed.

[0012] The discharge troughs are symmetrically opened on the outside of the main cylinder and the feeding cylinder.

[0013] A sealing assembly is installed inside the discharge channel to seal and open it.

[0014] Preferably, the primary screening unit includes: A cone-shaped primary screening plate is installed on the inner wall of the feeding cylinder and has several sieve holes larger than the feed particles.

[0015] Several swing plates are rotatably installed on the inner wall of the feeding cylinder and correspond to the outer upper part of the primary screening plate, and are interconnected in the middle.

[0016] Preferably, the magnetic unit includes: An annular plate is installed on the inner wall of the main cylinder.

[0017] A conical cylinder is installed in the middle of the annular plate, with its outer side converging towards the bottom center.

[0018] An inward-sloping plate is installed at the upper end of a conical cylinder, with its inner side being open.

[0019] An electromagnet, installed inside a conical cylinder and adapted to the extended surface of the conical cylinder, is used to adsorb metal particles from the feed inside the conical cylinder.

[0020] Preferably, the fine screening unit includes several fine screening plates located at the upper end of the inclined plate, with screen holes that decrease in diameter from top to bottom.

[0021] A connecting plate is installed between several fine sieve plates.

[0022] A support ring plate is installed between the bottom fine screen plate and the inward inclined plate, so that the inward inclined plate supports the fine screen plate through the support ring plate.

[0023] Preferably, two annular sliding grooves are respectively opened inside the main cylinder and the feeding cylinder, and are connected to the corresponding discharge grooves; The sealing plate is slidably installed in the sliding groove.

[0024] Preferably, the sealing component further includes: Flexible and retractable sealing rings are installed between the sealing plate and the corresponding main cylinder or feeding cylinder to seal the gap in the sliding groove.

[0025] Preferably, it also includes a jet assembly, which includes: The vertical tube is rotatably inserted into the mounting groove in the middle of several fine screen plates.

[0026] The bending groove is formed inside the vertical pipe.

[0027] Several horizontal tubes are installed at the upper end of the main cylinder, which are connected to the bending groove and located above the uppermost fine screen plate. Air blowing grooves are opened on the outside facing the fine screen plate.

[0028] The construction groove is located on the outside of the vertical pipe and inside the conical cylinder, with a diameter smaller than the diameter of the through-hole in the middle of the incline plate; several spray grooves are located on the inner wall of the outer side of the construction groove, communicating with the bending groove and inclined downward.

[0029] Preferably, the jet assembly further includes: The air inlet is rotatably inserted inside the main cylinder, and an external connecting pipe that communicates with the bottom of the bending groove is inserted in the middle of the air inlet.

[0030] An annular cover is installed at the bottom of a conical cylinder and one end of the conical cylinder is connected to it. A collection tube is inserted through the annular cover.

[0031] Preferably, the vertical pipe is driven to rotate by an external force, and the rotation synchronously drives the horizontal pipe and the structural groove to rotate, thereby changing the air jet direction of the blowing groove and the air jet angle of the spray groove.

[0032] In addition, the present invention also provides a method for screening and removing impurities from ultrafine feed materials, comprising the following steps: S1. Initial Screening: The feed to be processed is poured from the feed trough into the feeding cylinder, and the feed then enters the initial screening unit. The initial screening unit breaks up the clumps of feed, so that large impurities in the feed are screened out.

[0033] S2. Fine screening: The feed that has completed the initial screening enters the fine screening unit at the bottom. The fine screening unit then performs multi-stage screening of the feed to separate out the fine impurities inside the feed.

[0034] S3, Magnetic Adsorption: After completing steps S1 and S2, the feed enters the magnetic adsorption unit. The magnetic adsorption unit can generate magnetic force to intercept the metal particles in the feed that can be magnetically adsorbed, so that when the feed is finally discharged from the bottom of the magnetic adsorption unit, the metal particles remain inside it.

[0035] S4. Impurity discharge: The blocking component no longer blocks the discharge tank, allowing impurities in the primary screening unit and the fine screening unit to be discharged from the discharge tank. The magnetic adsorption unit no longer adsorbs metal particles, allowing the metal particles to be discharged to the outside of the magnetic adsorption unit.

[0036] In summary, this application includes at least one of the following beneficial technical effects: I. This invention vertically integrates the primary screening unit, the fine screening unit, the magnetic suction unit, and the sealing components within the main cylinder and the feeding cylinder, replacing the existing technology that requires multiple different devices to operate independently. This avoids the feed being exposed to the external environment at the equipment connection points, reduces the risk of feed becoming damp and clumping, ensures the stability of feed quality, and significantly reduces the equipment footprint, solving the problems of dispersed equipment and easy feed dampness in existing impurity removal systems.

[0037] Second, this invention utilizes the conical cylinder's retractable structure in the magnetic suction unit and the internally adapted electromagnet, along with the air jet assembly, to push the feed towards the inner wall of the conical cylinder. This ensures that the feed makes full contact with the inner wall of the conical cylinder, allowing deeply buried fine metal impurities to be magnetically attracted, thereby improving the metal impurity removal rate and solving the problem of insufficient adsorption of internal metal impurities by magnetic separation rollers in the prior art.

[0038] Third, this invention uses the swing plate and magnetic plate of the primary screening unit to break up clumps of feed, and the multi-stage sieve plate of the fine screening unit to separate fine impurities of different particle sizes. Combined with the air jet component, it prevents the sieve holes from clogging and assists in screening. This not only avoids large impurities from affecting subsequent equipment, but also improves the feed screening accuracy and solves the problem that existing impurity removal equipment is not effective in handling clumps and screening fine impurities. Attached Figure Description

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

[0040] Figure 1 This is a schematic diagram of the structure of the main body of the present invention.

[0041] Figure 2 This is a cross-sectional structural diagram of the main body of the present invention.

[0042] Figure 3 This is a cross-sectional structural diagram of the feed cylinder of the present invention.

[0043] Figure 4 This is the present invention. Figure 3 Enlarged view of part of the structure at point A in the middle.

[0044] Figure 5 This is a schematic diagram of the structure of the magnetic suction unit and the fine screening unit of the present invention.

[0045] Figure 6 This is a cross-sectional structural diagram of the sealing component of the present invention.

[0046] Figure 7 This is the present invention. Figure 6 Enlarged view of part of the structure at point B.

[0047] Figure 8This is a cross-sectional structural diagram of the jet assembly of the present invention.

[0048] Figure 9 This is the present invention. Figure 8 Enlarged view of part of the structure at point C.

[0049] Figure 10 This is the present invention. Figure 8 Enlarged view of part of the structure at point D.

[0050] Figure 11 This is a schematic diagram of the structure of the driving component of the present invention.

[0051] In the diagram, 1. Main cylinder; 10. Feeding cylinder; 11. Feed chute; 12. Discharge chute; 2. Primary screening unit; 20. Primary screening plate; 21. Swinging plate; 22. Annular cavity; 23. Rotating frame; 24. Magnetic plate; 25. Gear ring; 26. Rotating motor; 27. Rotating gear; 3. Magnetic suction unit; 30. Annular plate; 31. Conical cylinder; 32. Inwardly inclined plate; 4. Fine screening unit; 40. Fine screening plate; 41. Connecting plate; 42. Support 5. Ring plate; 6. Sealing assembly; 7. Sliding groove; 8. Sealing plate; 9. Sealing motor; 10. Sealing screw; 11. Sealing rubber ring; 12. Air jet assembly; 13. Vertical pipe; 24. Bending groove; 35. Horizontal pipe; 46. Air blowing groove; 57. Construction groove; 68. Spray groove; 79. Air inlet end; 80. External connecting pipe; 91. Annular cover; 10. Collection pipe; 11. Drive assembly; 22. Motor frame; 33. Drive motor. Detailed Implementation

[0052] The following combination Figures 1 to 11 The embodiments of the present invention will be described in detail below.

[0053] This application discloses a device and method for screening and removing impurities from ultrafine feed materials. It is used in the process of screening and removing impurities from ultrafine feed materials. Through the integrated processing of primary screening, fine screening and magnetic adsorption, it can achieve impurity separation and metal adsorption, reduce feed exposure and reduce equipment footprint. Furthermore, this application can also use an air jet component to assist in anti-clogging and cooperate with a sealing component to control the discharge of impurities, ensuring feed quality and operational continuity.

[0054] Example 1: Refer to Figure 1 and Figure 2 As shown, the device includes a main cylinder 1, a feeding cylinder 10, a feed trough 11, a primary screening unit 2, a magnetic suction unit 3, a fine screening unit 4, a discharge trough 12, and a sealing assembly 5. The main cylinder 1 is the main support frame of the device and is vertically continuous. The feeding cylinder 10, which is connected to the inside of the main cylinder 1, is installed at the upper end of the main cylinder 1. The feed trough 11 is opened at the upper end of the feeding cylinder 10. The primary screening unit 2, which is used to perform preliminary screening of feed and break up clumps of feed, is also installed inside the feeding cylinder 10.

[0055] The inner wall of the main cylinder 1 is equipped with a magnetic suction unit 3 for adsorbing metal particles in the feed. The upper end of the magnetic suction unit 3 is also equipped with a fine screening unit 4 for accurately screening small impurities in the feed, and the fine screening unit 4 corresponds to the primary screening unit 2 at the upper end.

[0056] Both the main cylinder 1 and the feeding cylinder 10 have symmetrically distributed discharge troughs 12 on their outer sides. The discharge troughs 12 are used to discharge the impurities screened out in the primary screening unit 2 and the fine screening unit 4 to avoid the accumulation of impurities. A sealing component 5 is installed in the discharge trough 12 to seal the discharge trough 12 when it is not necessary to remove impurities to prevent the feed from being discharged accidentally.

[0057] In addition, the present invention also provides a method for screening and removing impurities from ultrafine feed materials, comprising the following steps: S1. Feeding and initial screening: The feed to be processed is poured from the feed trough 11 into the feeding cylinder 10. The feed then enters the initial screening unit 2, which breaks up the clumps of feed, so that large impurities in the feed are screened out.

[0058] S2. Fine screening: The feed that has completed the initial screening enters the fine screening unit 4 at the bottom. Then, the fine screening unit 4 performs multi-stage screening of the feed to separate out the fine impurities inside the feed.

[0059] S3, Magnetic Adsorption: After completing steps S1 and S2, the feed enters the magnetic adsorption unit 3. The magnetic adsorption unit 3 can generate magnetic force to intercept the metal particles in the feed that can be magnetically adsorbed, so that when the feed is finally discharged from the bottom of the magnetic adsorption unit 3, the metal particles remain inside it.

[0060] S4. Impurity discharge: The sealing component 5 no longer seals the discharge tank 12, allowing the impurities in the primary screening unit 2 and the fine screening unit 4 to be discharged from the discharge tank 12. The magnetic adsorption unit 3 no longer adsorbs the metal particles, allowing the metal particles to be discharged to the outside of the magnetic adsorption unit 3.

[0061] Reference Figure 3 and Figure 4As shown, the primary screening unit 2 is used for preliminary screening of feed and breaking up agglomerated feed. Specifically, the primary screening unit 2 includes a primary screening plate 20, a swing plate 21, an annular cavity 22, a rotating frame 23, a magnetic plate 24, a gear ring 25, a rotating motor 26, and a rotating gear 27. The conical primary screening plate 20 is installed on the inner wall of the feeding cylinder 10. The primary screening plate 20 has several sieve holes larger than the feed particles. Several swing plates 21 are also rotatably installed on the inner wall of the feeding cylinder 10. The middle parts of the swing plates 21 are connected together. An annular cavity 22 is opened inside the feeding cylinder 10. A rotating frame 23 is rotatably installed in the annular cavity 22 and in contact with its interior. A magnetic plate 24 is installed on the end of the rotating frame 23 and the swing plate 21 facing the inner wall of the feeding cylinder 10.

[0062] When the rotating frame 23 is driven by an external force to rotate in the annular cavity 22, it can drive several swing plates 21 to rotate together at the upper end of the primary screening plate 20 through the magnetic plate 24. This can break up and push the large pieces of feed at the upper end of the primary screening plate 20, so that the feed can be screened from the primary screening plate 20 and fall into the fine screening unit 4, while large impurities will be trapped on the primary screening plate 20.

[0063] The magnetic plate 24 at the end of the swing plate 21 is magnetically engaged with the magnetic plate 24 inside the rotating frame 23, which can indirectly limit the swing plate 21 to the inside of the feeding cylinder 10 by the magnetic plate 24 inside the rotating frame 23, thus preventing the swing plate 21 from detaching from the primary screening plate 20.

[0064] A gear ring 25 is also installed on the outer side of the rotating frame 23, and a rotating motor 26 is installed on the inner wall of the annular cavity 22. A rotating gear 27 that meshes with the gear ring 25 is sleeved on the main shaft of the motor. The main shaft of the rotating motor 26 drives the rotating frame 23 to rotate through the cooperation of the rotating gear 27 and the gear ring 25, so that the rotating frame 23 can indirectly drive the swing plate 21 to rotate.

[0065] Reference Figure 5 As shown, the magnetic suction unit 3 is used to attract metal particles from the feed. Specifically, the magnetic suction unit 3 includes an annular plate 30, a conical cylinder 31, and an inwardly inclined plate 32. The annular plate 30 is installed on the inner wall of the main cylinder 1. The conical cylinder 31 is installed in the middle of the annular plate 30. The outer side of the conical cylinder 31 is tapered towards the bottom center. The upper end of the conical cylinder 31 is equipped with an inwardly inclined plate 32 that is through the inner side. An electromagnet (not shown in the figure) that is adapted to its extension surface is nested inside the conical cylinder 31.

[0066] That is, after the feed is discharged from the fine screening unit 4 and falls, it will fall onto the incline plate 32 and enter the conical cylinder 31 through the central opening, and slide evenly along its extension. During this process, the feed will fully contact the inner wall of the conical cylinder 31, and the electromagnet will be activated. The magnetism of the electromagnet will penetrate the conical cylinder 31 and react with the metal particles inside the feed to complete the adsorption. The bottom of the conical cylinder 31 is open, that is, the subsequent feed will be discharged from the bottom of the conical cylinder 31.

[0067] Continue to refer to Figure 5 As shown, this is the fine screening unit 4 used for precise screening of large impurities in feed. Specifically, the fine screening unit 4 includes a fine screening plate 40, a connecting plate 41, and a support ring plate 42. Several fine screening plates 40 are located at the upper end of the incline plate 32, and the fine screening plates 40 are connected to each other through the connecting plate 41. The bottom fine screening plate 40 is connected to the incline plate 32 by a support ring plate 42. Several screen holes are also opened on the fine screening plate 40, and the diameter of the screen holes on the several fine screening plates 40 decreases from top to bottom, so that after the feed falls onto the upper fine screening plate 40, it is screened step by step under the action of the screen holes.

[0068] Fine impurities with a diameter larger than the sieve openings of the upper fine sieve plate 40 will be trapped on this fine sieve plate 40, while feed particles that meet the sieve size requirements will fall smoothly to the lower fine sieve plate 40. Through the gradual screening of multiple sieve plates with different sieve sizes, fine impurities of different particle sizes in the feed can be accurately separated, ensuring that the feed particles that finally enter the magnetic adsorption unit 3 are of uniform size, and avoiding the problem of insufficient adsorption of metal particles in the subsequent magnetic adsorption process due to particle differences.

[0069] Meanwhile, the support ring plate 42 not only provides support for the multi-layer fine screen plate 40, but also prevents the feed from leaking out from the edge of the fine screen plate 40 during the falling process, ensuring the regularity of the screening path, so that the screened feed can accurately fall into the lower inward plate 32, and then enter the conical cylinder 31 in an orderly manner to complete the subsequent magnetic suction impurity removal steps.

[0070] Reference Figure 6 and Figure 7As shown, the sealing assembly 5 is used to block and open the discharge trough 12. Specifically, the sealing assembly 5 includes a sliding groove 50, a sealing plate 51, a sealing motor 52, a sealing screw 53, and a sealing rubber ring 54. Two annular sliding grooves 50 are opened inside the main cylinder 1 and the feeding cylinder 10 and communicate with the corresponding discharge trough 12. The sealing plate 51 is installed in the sliding groove 50 and is slidably connected to its inner wall. That is, when the feed is being screened, the sealing plate 51 blocks the discharge trough 12 to prevent the feed from being accidentally discharged from the discharge trough 12. When the feed has completed the initial fine screening, the sealing plate 51 is driven by external force to move downward in the sliding groove 50 and no longer blocks the discharge trough 12. This allows the impurities screened on the primary screening plate 20 and the fine screening plate 40 to move along their inclined surfaces toward the corresponding discharge trough 12 and finally be discharged from the discharge trough 12.

[0071] A sealing motor 52 is installed on the inner wall of the sliding groove 50. A sealing screw 53 that can rotate with the sealing motor 52 is installed on the main shaft of the sealing motor 52. One end of the sealing screw 53 rotates through the corresponding sealing plate 51 and is threadedly connected to it. That is, the sealing motor 52 can drive the sealing plate 51 to move up and down by adjusting the forward and reverse rotation of the sealing screw 53, and support the sealing plate 51.

[0072] A sealing ring 54 is installed between the sealing plate 51 and the corresponding main cylinder 1 or feeding cylinder 10. The sealing ring 54 is made of soft rubber and has elastic pleats on its surface, so it can move up and down with the sealing plate 51. When the sealing plate 51 seals the discharge trough 12, it seals the passage between the sliding trough 50 and the main cylinder 1 or feeding cylinder 10, preventing feed from accidentally entering the sliding trough 50 and obstructing the movement path of the sealing plate 51, causing it to jam.

[0073] Reference Figure 8 , Figure 9 and Figure 10As shown, an installation groove is provided in the middle of multiple fine screen plates 40, and a vertical pipe 60 is rotatably inserted into the installation groove. An air jet assembly 6 for jetting air into the main cylinder 1 is provided in the vertical pipe 60. Specifically, the air jet assembly 6 includes a vertical pipe 60, a bending groove 61, a horizontal pipe 62, an air blowing groove 63, a structural groove 64, a jetting groove 65, an air inlet end 66, an external connecting pipe 67, an annular cover 68, and a collection pipe 69. The bending groove 61 is opened inside the vertical pipe 60. Several horizontal pipes 62 that communicate with the bending groove 61 and are located on the uppermost fine screen plate 40 are installed at the upper end of the main cylinder 1. Several air-blowing grooves 63 facing the fine sieve plate 40 are opened on the outside of the horizontal tube 62. That is, the air supply end of the external air supply equipment is connected to one end of the bending groove 61. High-pressure gas is transported to each horizontal tube 62 through the bending groove 61 and then sprayed out directionally from the several air-blowing grooves 63. The airflow directly acts on the feed layer on the fine sieve plate 40. On the one hand, it can push the feed particles through the sieve holes quickly, avoiding small feed particles from being stuck in the sieve holes due to static electricity or adhesion and causing blockage. On the other hand, it can break up the accumulated feed layer, ensuring that feed particles of different sizes can fully contact the sieve holes and improve the efficiency of step-by-step screening.

[0074] The outer side of the vertical tube 60 is also provided with a structural groove 64 located inside the conical cylinder 31. The diameter of the structural groove 64 is smaller than the diameter of the through-hole in the middle of the incline plate 32. Therefore, after the feed falls from the fine screening unit 4 to the incline plate 32, it will converge along the inclined surface of the incline plate 32 and fall precisely into the structural groove 64 through the middle through-hole. Several spray grooves 65 are provided on the inner wall of the outer side of the structural groove 64, which are connected to the bending groove 61 inside the vertical tube 60. The spray grooves 65 are set at an angle downward. When the feed enters the structural groove 64, the high-pressure gas in the bending groove 61 is sprayed out through the spray grooves 65, forming a directional airflow that pushes the feed particles toward the inner wall of the conical cylinder 31. This allows the feed particles to impact the inner wall of the conical cylinder 31 in a dispersed state, preventing the feed particles from piling up and causing some metal impurities to be trapped and unable to contact the electromagnet. This further improves the adsorption effect of the magnetic adsorption unit 3 on metal particles.

[0075] Similarly, during the subsequent cleaning process, small impurities are easily left in the sieve holes of the fine sieve plate 40, and metal fragments and trace amounts of feed powder are attached to the inner wall of the conical cylinder 31. These residues have small particle sizes and strong adhesion, making them difficult to fall off naturally. Therefore, the external air supply equipment increases the air supply pressure, and the high-pressure airflow sprayed from the air blowing groove 63 can reverse the flow to flush the sieve holes of the fine sieve plate 40, blowing out the impurities blocking the sieve holes. At the same time, the airflow sprayed from the spray groove 65 flows along the tangential direction of the inner wall of the conical cylinder 31, sweeping the inner wall of the conical cylinder 31 in all directions, so that the attached metal fragments and feed powder are separated from the inner wall, making it easier for the subsequent impurity discharge process to clean them centrally.

[0076] Furthermore, during the aforementioned process, the vertical pipe 60 can also be driven to rotate by an external force. When the vertical pipe 60 rotates, it will simultaneously drive the horizontal pipe 62 and the structural groove 64 to rotate together. When the horizontal pipe 62 rotates with the vertical pipe 60, the jet direction of the air blowing groove 63 will continuously change with the circumferential motion of the horizontal pipe 62, which can provide a full-coverage airflow effect on the surface of the fine screen plate 40, avoiding the formation of airflow blind spots in local areas due to a fixed air blowing direction, thereby preventing feed from accumulating in blind spots and affecting the screening effect. When the structural groove 64 rotates with the vertical pipe 60, the jet angle of the spray groove 65 will also be adjusted synchronously, so that the high-pressure airflow can act on different areas of the inner wall of the conical cylinder 31, evenly pushing the feed particles to various positions on the inner wall of the conical cylinder 31, further ensuring that each feed particle can fully contact the inner wall of the conical cylinder 31, maximizing the adsorption efficiency of the magnetic adsorption unit 3 for metal particles, and significantly optimizing the overall effect of the jet assembly 6.

[0077] An air inlet end 66 is rotatably inserted inside the main cylinder 1. A sealed bearing is installed at the connection between the air inlet end 66 and the inner wall of the main cylinder 1 to ensure the sealing of the main cylinder 1 when the air inlet end 66 rotates inside the main cylinder 1, and to prevent feed particles or impurities from leaking out from the gap between the air inlet end 66 and the main cylinder 1.

[0078] An external connecting pipe 67, which communicates with the bottom of the bending groove 61, is inserted in the middle of the air inlet 66. The external connecting pipe 67 is connected to the air inlet 66 by a rotary sealing structure. This structure can ensure that the high-pressure gas from the external air supply equipment is stably delivered to the bending groove 61 to continuously provide high-pressure airflow to the blowing groove 63 and the jet groove 65, and will not obstruct the synchronous rotation of the vertical pipe 60 and the air inlet 66. This achieves the coordinated operation of the air supply action and the rotation action of the vertical pipe 60, ensuring that the jet assembly 6 can play a stable and efficient role in the feed screening stage and the subsequent cleaning stage.

[0079] At the bottom of the conical cylinder 31, an annular cover 68 with one end connected to it is also installed. A collection pipe 69 is inserted through the annular cover 68. The feed can fall from the conical cylinder 31 into the annular cover 68 and then be discharged from the collection pipe 69, which is convenient for the personnel to collect.

[0080] Thus, all units and components of this equipment are distributed from top to bottom within the main cylinder 1 and the feeding cylinder 10, significantly reducing the lateral footprint of the equipment. Unlike existing technologies with multi-module dispersed layouts, it does not require reserved connecting channels and operating space, making it more suitable for processing scenarios with limited space. After entering from the feeding trough 11, the feed passes through the primary screen, fine screen, and magnetic suction unit 3 in sequence to complete impurity removal, and is finally discharged from the collection pipe 69 on the annular cover 68. No external transfer equipment is required throughout the process, reducing the number of times the feed is exposed to protect its quality, and also reducing energy consumption and maintenance workload. Furthermore, the vertical and tight connection of each unit allows the feed to fall naturally without manual path adjustment, avoiding the problem of accumulation and leakage, and improving impurity removal efficiency. The vertical structure also makes it convenient for operators to inspect the components from top to bottom along the maintenance platform on the outside of the main cylinder 1. Combined with the symmetrically distributed discharge troughs 12 on the outside, it further improves the convenience of maintenance and impurity cleaning.

[0081] Example 2: Refer to Figure 11 As shown, based on Embodiment 1, the upper end of the main cylinder 1 passes through the middle of the primary screening plate 20 and is located at the through-hole in the middle of the feeding cylinder 10. A drive assembly 7 for driving the vertical pipe 60 to rotate is installed on the outside of the feeding cylinder 10. Specifically, the drive assembly 7 includes a motor frame 70 and a drive motor 71. The motor frame 70 is installed on the outer wall of the feeding cylinder 10 and has an L-shaped structure. The horizontal section is fixed to the feeding cylinder 10 by bolts, and the vertical section extends upward, with an inverted drive motor 71 installed at the end. The main shaft of the drive motor 71 is vertically downward and is coaxially connected to the upper end of the vertical pipe 60 through an elastic material coupling. This can buffer vibration to avoid affecting the screening accuracy, while stably transmitting rotational power to provide support for the vertical pipe 60 to drive the horizontal pipe 62 and the structural groove 64 to rotate.

[0082] Furthermore, the vertical tube 60 passes through the middle of multiple fine screening plates 40 and primary screening plates 20. Deep groove ball bearings are installed at the penetration points. The inner ring of the bearing is interference-fitted with the vertical tube 60, and the outer ring is fixed to the inner wall of the mounting hole of the plate. The rolling friction reduces the rotational resistance, reduces the load on the drive motor 71, and avoids wear on the mounting hole.

[0083] Based on this, an installation cavity can be opened inside the upper end of the vertical tube 60. The vibration motor is fixed inside the cavity by a shock-absorbing pad, and the output end faces the primary screening plate 20. After the vibration motor is started, it generates high-frequency vibration, which is transmitted to the primary screening plate 20 through the vertical tube 60. This can cause large impurities on the plate to move along the inclined surface to the discharge trough 12, avoiding accumulation. At the same time, it loosens the clumps of feed and assists the swing plate 21 in breaking up the feed, thereby improving the primary screening efficiency.

[0084] The vibration damping pad between the vibratory motor and the mounting cavity is made of rubber, which can absorb some vibration and prevent excessive vibration from causing other parts to loosen or be damaged.

[0085] Furthermore, each of the swing plates 21 has a through hole in the middle that is compatible with the vertical tube 60. The vertical tube 60 passes through the through hole and is fixedly connected to the swing plate 21. That is, when the vertical tube 60 rotates, it can directly drive the swing plate 21 to rotate synchronously on the upper end of the primary screening plate 20 without relying on the original rotating frame 23, gear ring 25 and rotating motor 26 for transmission.

[0086] Based on Embodiments 1 and 2, and as well as conventional knowledge among those skilled in the art, it will be understood that the present invention is not limited to the specific embodiments described above. For example: The drive mechanism that drives the vertical tube 60 to rotate is not limited to the inverted drive motor 71. It can also be a stepper motor, servo motor or other motor with precise speed regulation function, which indirectly drives the vertical tube 60 to rotate through gear transmission or belt transmission.

[0087] The sealing motor 52 and screw drive structure that control the movement of the sealing plate 51 can also be a linear drive device such as a hydraulic cylinder or a pneumatic cylinder, which can directly or indirectly push the sealing plate 51 to move within the sliding groove 50.

[0088] The rotating motor 26 that drives the rotating frame 23 of the primary screening unit 2 can also be a geared motor, a variable frequency motor, etc., and the rotation speed can be flexibly adjusted according to the feed processing volume.

[0089] The vibration mechanism that provides vibration to the vertical tube 60 is not limited to the vibration motor installed inside the vertical tube 60. It can also be achieved by directly installing the miniature vibration motor on the edge of the primary screening plate 20 and transmitting the vibration to the primary screening plate 20 through the connecting rod.

[0090] Material selection can be adjusted according to the actual use scenario. For example, the housing material of drive motor 71 can be waterproof or dustproof depending on the humidity and dust conditions in the workshop, thereby improving the service life of the motor.

[0091] It will be apparent to those skilled in the art that the present 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 in all respects as exemplary and not restrictive.

[0092] 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 device for screening and removing impurities from ultrafine feed materials, characterized in that: include: The main cylinder, which runs vertically through the body, serves as the main support frame of this device. The feeding cylinder is installed at the upper end of the main cylinder and communicates with it. A feeding chute is opened in the middle of the feeding cylinder. The primary screening unit is installed inside the feeding cylinder and is used to break up clumps of feed and screen out large impurities. The magnetic adsorption unit is installed on the inner wall of the main cylinder to adsorb metal particles; The fine screening unit is installed on the top of the magnetic suction unit and is used to accurately screen out small impurities in the feed; Discharge troughs are symmetrically opened on the outside of the main cylinder and the feeding cylinder; A sealing assembly, installed inside the discharge channel, is used to seal and open it. The magnetic unit includes: An annular plate is installed on the inner wall of the main cylinder; A conical cylinder is installed in the middle of the annular plate, with its outer side converging towards the bottom center; An inclining plate is installed at the upper end of a conical cylinder, with a through-type inner side; An electromagnet, installed inside a conical cylinder and adapted to the extended surface of the conical cylinder, is used to adsorb metal particles of feed inside the conical cylinder. The fine screening unit includes several fine screening plates located at the upper end of the inclined plate, with screen holes that decrease in diameter from top to bottom; A connecting plate is installed between several fine sieve plates; A support ring plate is installed between the bottom fine screen plate and the inward inclined plate, so that the inward inclined plate supports the fine screen plate through the support ring plate; It also includes a jet assembly, which includes: The vertical tube is rotatably inserted into the mounting groove in the middle of several fine sieve plates; The bending groove is formed inside the vertical pipe; Several horizontal tubes are installed at the upper end of the main cylinder, which are connected to the bending groove and located above the uppermost fine screen plate. Air blowing grooves facing the fine screen plate are opened on the outside. The construction groove is located on the outside of the vertical pipe and inside the conical cylinder, with a diameter smaller than the diameter of the through-hole in the middle of the incline plate; several spray grooves are located on the inner wall of the outer side of the construction groove, communicating with the bending groove and inclined downward.

2. The feed ultrafine material screening and impurity removal device according to claim 1, characterized in that: The initial screening unit includes: A cone-shaped primary screening plate is installed on the inner wall of the feeding cylinder and has several screen holes larger than the feed particles. Several swing plates are rotatably installed on the inner wall of the feeding cylinder and correspond to the outer upper part of the primary screening plate, and are interconnected in the middle.

3. The feed ultrafine material screening and impurity removal device according to claim 1, characterized in that: The plugging components include: Two annular sliding grooves are respectively opened inside the main cylinder and the feeding cylinder, and are connected to the corresponding discharge grooves; The sealing plate is slidably installed in the sliding groove.

4. The feed ultrafine material screening and impurity removal device according to claim 3, characterized in that: The sealing components also include: Flexible and retractable sealing rings are installed between the sealing plate and the corresponding main cylinder or feeding cylinder to seal the gap in the sliding groove.

5. The feed ultrafine material screening and impurity removal device according to claim 1, characterized in that: The jet assembly also includes: The air inlet is rotatably inserted inside the main cylinder, and an external connecting pipe that communicates with the bottom of the bending groove is inserted in the middle of the air inlet. An annular cover is installed at the bottom of a conical cylinder and one end of the conical cylinder is connected to it. A collection tube is inserted through the annular cover.

6. The feed ultrafine material screening and impurity removal device according to claim 1, characterized in that: The vertical pipe is driven to rotate by an external force. When it rotates, it simultaneously drives the horizontal pipe and the structural groove to rotate, causing the air jet direction of the blowing groove and the air jet angle of the spray groove to change.

7. A method for screening and removing impurities from ultrafine feed materials, employing the ultrafine feed material screening and impurity removal device as described in any one of claims 1-6, characterized in that, The impurity removal method includes the following steps: S1. Feeding and initial screening: The feed to be processed is poured from the feed trough into the feeding cylinder, and the feed then enters the initial screening unit. The initial screening unit breaks up the clumps of feed, so that large impurities in the feed are screened out. S2. Fine screening: The feed that has completed the initial screening enters the fine screening unit at the bottom. The fine screening unit then performs multi-stage screening of the feed to separate out the fine impurities inside the feed. S3, Magnetic Adsorption: After completing steps S1 and S2, the feed enters the magnetic adsorption unit. The magnetic adsorption unit can generate magnetic force to intercept the metal particles in the feed that can be magnetically adsorbed, so that when the feed is finally discharged from the bottom of the magnetic adsorption unit, the metal particles remain inside it. S4. Impurity discharge: The blocking component no longer blocks the discharge tank, allowing impurities in the primary screening unit and the fine screening unit to be discharged from the discharge tank. The magnetic adsorption unit no longer adsorbs metal particles, allowing the metal particles to be discharged to the outside of the magnetic adsorption unit.

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