A classified recycling device for non-ferrous metal scrap recycling

Abstract

This invention provides a sorting and recycling device for non-ferrous metal scrap, comprising a vibrating screen, multiple conveyor belts, an eddy current assembly, and a telescopic assembly. The vibrating screen is equipped with a multi-layer screen with progressively decreasing apertures, a discharge port, and an adjusting mechanism for adjusting the aperture. The number of conveyor belts is equal to the number of discharge ports, and the input side of the conveyor belt corresponds one-to-one with the position of the discharge port. The eddy current assembly is located inside the roller on the output side of the conveyor belt. The eddy current assembly includes a first driving component, a rotating shaft, a rotating base, a first magnetic pole piece, and a second magnetic pole piece. The first driving component is drively connected to the rotating shaft. The rotating base is fixed on the rotating shaft. Multiple first magnetic pole pieces are spaced apart along the circumferential edge of the rotating base. The first magnetic pole pieces slide on the rotating base, and the second magnetic pole pieces are fixed on the rotating base. The telescopic assembly is located on the rotating base and is used to drive the first magnetic pole pieces to move horizontally along the radial direction of the rotating base. The second magnetic pole pieces fill the gaps between adjacent first magnetic pole pieces. This invention can sort non-ferrous metal scrap with high precision.

Description

Technical Field

[0001] This invention relates to the field of non-ferrous metal sorting technology, and in particular to a sorting and recycling device for non-ferrous metal scrap. Background Technology

[0002] Non-ferrous metals refer to all metals other than iron, chromium, and manganese (ferrous metals), such as copper, aluminum, zinc, lead, and nickel. They are not only important strategic materials but also indispensable means of production and daily life for humankind. However, with the rapid advancement of industrialization and urbanization, the demand for non-ferrous metals is increasing daily, while the Earth's non-ferrous metal resources are not inexhaustible. Therefore, the importance of recycling and reusing non-ferrous metals is becoming increasingly prominent.

[0003] Currently, eddy current separation technology is commonly used to separate mixed scraps of non-ferrous metals. The specific principle is based on the fact that a conductor can generate an induced current in a high-frequency alternating magnetic field. During operation, a high-frequency alternating strong magnetic field is generated on the surface of the sorting magnetic roller. When conductive non-ferrous metals pass through the magnetic field, eddy currents are induced within the non-ferrous metals. These eddy currents themselves generate a magnetic field in the opposite direction to the original magnetic field. Non-ferrous metals (such as aluminum and copper) will then fly forward along their conveying direction due to the repulsive force of the magnetic field. Since the magnitude of the eddy current generated by each type of non-ferrous metal is different, the distance of forward flight will also be different, thus achieving the purpose of separating different types of non-ferrous metals.

[0004] However, since there are fragments of a certain range of particle sizes in the mixed non-ferrous metals, there will also be fragments that exceed that range. If the strength of the alternating magnetic field generated on the surface of the magnetic roller remains unchanged, these relatively large fragments will not be able to fly into the corresponding collection area, resulting in a decrease in sorting accuracy. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a sorting and recycling device for non-ferrous metal scrap recycling, which aims to sort non-ferrous metal scrap with high precision and improve the purity of various non-ferrous metals collected.

[0006] This invention provides a sorting and recycling device for non-ferrous metal scrap, including a vibrating screen, multiple conveyor belts, a vortex assembly, and a telescopic assembly. The vibrating screen has multiple layers of screens with progressively smaller apertures from top to bottom, a discharge port, and an adjusting mechanism. The discharge port discharges non-ferrous metal scraps from each layer of screens. The adjusting mechanism adjusts the aperture of the screens. The number of conveyor belts is equal to the number of discharge ports, and the input side of each conveyor belt corresponds to the position of the discharge port. The vortex assembly is located on the conveyor belts. Inside the roller on the output side, the eddy current assembly includes a first driving member, a rotating shaft, a rotating base, a first magnetic pole piece, and a second magnetic pole piece. The first driving member is connected to the rotating shaft for transmission. The rotating base is fixed on the rotating shaft. Multiple first magnetic pole pieces are provided and spaced apart along the circumferential edge of the rotating base. The first magnetic pole pieces slide on the rotating base. The second magnetic pole pieces are fixed on the rotating base. A telescopic assembly is provided on the rotating base and is used to drive the first magnetic pole pieces to move horizontally outward and inward along the radial direction of the rotating base. The second magnetic pole pieces fill the gaps between adjacent first magnetic pole pieces.

[0007] In addition, the sorting and recycling apparatus for non-ferrous metal scrap recycling according to the present invention may also have the following additional technical features:

[0008] Furthermore, the telescopic assembly includes a second driving member and a turntable. The second driving member is fixed on the turntable and is connected to the turntable in a transmission manner to drive the turntable to rotate relative to the turntable. The first magnetic pole member has a rod portion. The turntable is provided with a sliding cavity and a first straight groove that radiates radially therefrom. The sliding cavity communicates with the first straight groove. The turntable is provided with an arc-shaped groove that radiates radially therefrom and corresponds to the position of the first straight groove. The rod portion is sleeved in the sliding cavity. The rod portion is provided with a first slider. The first slider passes through both the arc-shaped groove and the first straight groove. When the second driving member drives the turntable to rotate, the turntable drives the first magnetic pole member to move horizontally along the length direction of the first straight groove through the first slider.

[0009] Furthermore, the discharge port and the conveyor belt are also equipped with a grading mechanism. The grading mechanism includes a third driving component and multiple closed loop belts that radiate uniformly from one side of the conveyor belt width direction to the other side of the conveyor belt width direction. The interval between adjacent closed loop belts gradually increases. The third driving component is connected to the closed loop belts to drive the closed loop belts to rotate. Multiple eddy current components are provided accordingly. The multiple eddy current components rotate coaxially. The number of telescopic components is at least equal to the number of eddy current components.

[0010] Furthermore, the grading mechanism also includes a torsion structure for driving the closed loop to rotate. The torsion structure includes a telescopic drive component, a telescopic rod, a limiting component, a sleeve, and a clamping block. The telescopic drive component is connected to the telescopic rod to drive the telescopic rod to move up and down. The sleeve is provided with a second straight groove, and the telescopic rod is slidably disposed in the second straight groove. The limiting component is disposed at one end of the telescopic rod that extends into the second straight groove. The outer wall of the clamping block is provided with a spiral groove, and the middle part of the clamping block is provided with a limiting hole to prevent the closed loop from rotating. The limiting component extends out of the second straight groove and is inserted into the spiral groove to drive the clamping block to rotate in both directions when the telescopic rod moves up and down.

[0011] Furthermore, the rotation plane of the closed loop is perpendicular to its transmission direction.

[0012] Furthermore, the closed loop is provided with an arc-shaped protrusion.

[0013] Furthermore, a dispersing mechanism is provided between the grading mechanism and the conveyor belt. The dispersing mechanism includes a fourth driving member, a base, multiple pallets arranged side by side, and a limiting plate. The fourth driving member is fixed on the base, and the pallets are slidably disposed on the base. One end of the pallet is provided with a second slider. The limiting plate is provided with a third straight groove equal in number to the pallets. The second slider is limited and passes through the third straight groove. The interval between adjacent third straight grooves increases linearly outward in the direction away from the pallet. The fourth driving member is connected to the limiting plate for transmission, so that the pallets can be moved horizontally in the conveying direction parallel to the conveyor belt through the limiting plate.

[0014] Furthermore, a magnetic shielding plate is provided between adjacent eddy current components.

[0015] Furthermore, the non-ferrous metal scrap recycling sorting and recycling device also includes an image recognition device and a sorting device that are electrically connected to each other. The image recognition device is used to identify non-ferrous metal scraps of abnormal size conveyed on the conveyor belt, and the sorting device is used to sort the non-ferrous metal scraps of abnormal size identified by the image recognition device separately.

[0016] Furthermore, the pitch adjustment mechanism includes a pitch-changing slide table and a fifth driving component. The pitch-changing slide table is fixedly connected to the vibrating screen and has a screw inside. The screw has a pitch-changing groove. A connecting rod is provided between the two sides of the pitch-changing slide table. A protrusion slides on the connecting rod. One end of the protrusion is inserted into the pitch-changing groove, and the other end of the protrusion is used to connect the warp and weft wires of the screen. The fifth driving component is set on the pitch-changing slide table to drive the screw to rotate.

[0017] The beneficial effects of this invention include at least the following: The rotating shaft is driven to rotate by the first driving component, and the rotating base also rotates accordingly. This creates an alternating NSN magnetic field on the surface of the conveyor belt. When conductive non-ferrous metals pass through the magnetic field, eddy currents are induced within the metals. These eddy currents generate a magnetic field opposite to the original magnetic field. The non-ferrous metals are then propelled forward along the conveyor belt's transport direction due to the repulsive force of the magnetic field. Since the magnitude of the eddy currents generated by each type of non-ferrous metal is different, the distance they protrude forward also varies, thus achieving the purpose of sorting different types of non-ferrous metals. Simultaneously, for debris of different particle sizes screened by the vibrating screener, the repulsive force can be adjusted by regulating the extension and retraction of the first magnetic pole component. This avoids the need to replace with a stronger magnet, or the inability to find a magnet of the appropriate magnetic strength, or the need to adjust the current input to the electromagnet, thereby improving sorting accuracy. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the vibrating screening machine in an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the conveyor belt structure in an embodiment of the present invention;

[0020] Figure 3 This is a distribution diagram of the first and second magnetic pole pieces in an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the turntable structure in an embodiment of the present invention;

[0022] Figure 5 This is a first-view structural schematic diagram of the telescopic component in an embodiment of the present invention;

[0023] Figure 6 This is a second-view structural schematic diagram of the telescopic component in an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the grading mechanism in an embodiment of the present invention;

[0025] Figure 8 This is a schematic diagram of the torsion structure in an embodiment of the present invention;

[0026] Figure 9 for Figure 8 A magnified view of a section at point A in the middle;

[0027] Figure 10 This is a schematic diagram of the dispersing mechanism in an embodiment of the present invention;

[0028] Figure 11 This is a schematic diagram of the adjusting mechanism in an embodiment of the present invention;

[0029] Explanation of key component symbols:

[0030] Vibrating screen 100, multi-layer screen 110, pitch adjustment mechanism 120, variable pitch slide 121, screw 1211, variable pitch groove 1212, connecting rod 1213, protrusion 1214, fifth drive component 122, discharge port 130;

[0031] Conveyor belt 200, roller 210;

[0032] First driving component 310, rotating shaft 320, rotating seat 330, first straight slide groove 331, sliding cavity 332, first magnetic pole component 340, rod 341, first slider 3411, second magnetic pole component 350;

[0033] Second drive component 410, turntable 420, arc groove 421;

[0034] The graded mechanism 500, the third driving component 510, the closed loop belt 520, the protrusion 521, the torsion structure 530, the telescopic driving component 531, the telescopic rod 532, the limiting component 533, the sleeve 534, the second straight slide groove 5341, the clamping block 535, the spiral groove 5351, and the limiting hole 5352.

[0035] Dispersion mechanism 600, fourth driving component 610, base 620, support plate 630, second slider 631, limiting plate 640, third straight slide groove 641;

[0036] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0037] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0038] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0040] In this invention, non-ferrous metals are precision crushed into near-spherical shapes. This precision crushing can be achieved through specific mechanical equipment and processes. This equipment applies uniform force to the metal material, causing it to gradually break down and form near-spherical blocks. These blocks contain various non-ferrous metals, such as copper, aluminum, tin, and zinc. Because these non-ferrous metals have different physical properties, they must be sorted and screened for reuse. Currently, eddy current separation technology is mainly used for this purpose. However, to ensure that the final sorted non-ferrous metals are as free of other types of non-ferrous metals as possible, the influence of non-ferrous metal fragments of different particle sizes on the screening accuracy must be considered. Therefore, this invention provides a sorting and recycling device for non-ferrous metal fragments, which can screen non-ferrous metal fragments with high precision, ensuring that the purity of each type of non-ferrous metal in the final sorted product remains at a high level.

[0041] Specifically, please refer to Figures 1 to 11 The present invention provides a sorting and recycling device for non-ferrous metal scrap recycling, including a vibrating screen 100, multiple conveyor belts 200, a vortex assembly, and a telescopic assembly.

[0042] The vibrating screen 100 is internally equipped with multiple layers of screens 110 with progressively smaller apertures from top to bottom, and an adjusting mechanism 120. Exemplarily, there are three layers of screens 110 from top to bottom: the first layer has an aperture of D1, the second layer has an aperture of D2, and the third layer has an aperture of D3. When non-ferrous metal scraps are poured into the vibrating screen 100, scraps with a particle size larger than D1 are intercepted on the first layer of screens 110, scraps with a particle size between D2 and D1 are intercepted on the second layer of screens 110, and scraps with a particle size between D3 and D2 are intercepted on the third layer of screens 110. Simultaneously, to prevent scrap accumulation on each layer of screens 110 and clogging of the screen holes, the screens 110 need to be vibrated, thus accelerating the screening efficiency. The specific implementation of the vibration function is existing technology and will not be elaborated here.

[0043] In order to remove non-ferrous metal debris from the screen 110, the vibrating screen 100 is provided with multiple discharge ports 130. The number of discharge ports 130 is the same as the number of layers of screen 110, so that non-ferrous metal debris on each layer of screen 110 can be discharged from the corresponding discharge port 130.

[0044] Since the recycled materials processed by crushing are different, the final approximately spherical blocks may have inconsistent sizes. If a screen 110 with a fixed aperture is used, the screening effect may be affected. Therefore, this application provides a distance adjustment mechanism 140 on the vibrating screen 100, which can adjust the aperture of the screen 110.

[0045] Since the size of the non-ferrous metal scraps on each layer of screen 110 is different, in order to perform eddy current separation on them separately, the number of conveyor belts 200 needs to be set to be equal to the number of discharge ports 130, and the input side of the conveyor belt 200 and the position of the discharge port 130 should correspond one-to-one to receive and transport the non-ferrous metal scraps.

[0046] The eddy current assembly is located inside the roller 210 on the output side of the conveyor belt 200. Specifically, the eddy current assembly includes a first drive member 310, a rotating shaft 320, a rotating base 330, a first magnetic pole member 340, and a second magnetic pole member 350. The first drive member 310 is connected to the rotating shaft 320. The rotating base 330 is fixed on the rotating shaft 320. Multiple first magnetic pole members 340 are spaced along the circumferential edge of the rotating base 330. The first magnetic pole members 340 slide on the rotating base 330. The second magnetic pole member 350 is fixed on the rotating base 330 and its magnetism is opposite to that of the first magnetic pole member 340. For example, when the first magnetic pole member 340 is an N-polarity magnet, the second magnetic pole member 350 is an S-polarity magnet.

[0047] Optionally, the first driving component 310 can be a rotary motor, and the first magnetic pole component 340 and the second magnetic pole component 350 can both be electromagnets. Preferably, the first magnetic pole component 340 and the second magnetic pole component 350 are both permanent magnets made of permanent magnet neodymium iron boron material. Magnets made of this material have stable and strong magnetism and are easy to control. Unlike electromagnets, they do not require different currents to control the strength of the generated magnetic field. In the end, permanent magnets with alternating NSN orientation can be formed at the roller 210.

[0048] A telescopic assembly is mounted on the rotary base 330 to extend and retract the first magnetic pole piece 340. To ensure that a permanent magnet with alternating NSN orientations is formed during the extension and retraction of the first magnetic pole piece 340, a second magnetic pole piece 350 fills the gap between adjacent first magnetic pole pieces 340. In operation, when the telescopic assembly drives the first magnetic pole piece 340 to move radially outward along the rotary base 330, the first magnetic pole piece 340 moves closer to the non-ferrous metal debris on the conveyor belt 200. This results in a larger eddy current generated by the non-ferrous metal debris, which in turn generates a stronger magnetic field opposite to the original magnetic field. Consequently, the resulting magnetic repulsion force is stronger, and the non-ferrous metal debris flies forward a greater distance.

[0049] Similarly, when the telescopic component drives the first magnetic pole 340 to move radially inward along the rotary seat 330, the first magnetic pole 340 moves away from the non-ferrous metal debris on the conveyor belt 200, causing the eddy current generated by the non-ferrous metal debris to decrease. As a result, the magnetic field generated by the eddy current itself, which is opposite to the original magnetic field, also decreases, and the magnetic repulsive force generated by it also decreases, and the distance that the non-ferrous metal debris flies forward also decreases.

[0050] In this embodiment, when the first driving member 310 drives the rotating shaft 320 to rotate, the rotating base 330 also rotates accordingly. The resulting NSN-aligned magnets generate a high-frequency alternating magnetic field on their surface, the frequency of which is related to the rotational speed of the rotating base 330. When a conductive non-ferrous metal passes through the magnetic field, eddy currents are induced within it. These eddy currents generate a magnetic field opposite to the original magnetic field, causing the non-ferrous metal to fly forward along the conveyor belt 200 due to the repulsive force of the magnetic field. Since the magnitude of the eddy currents generated by each type of non-ferrous metal is different, the distance it flies forward also varies, thus achieving the purpose of sorting different types of non-ferrous metals. Simultaneously, for debris of different particle sizes screened by the vibrating screener 100, the repulsive force can be adjusted by regulating the extension and retraction of the first magnetic pole member 340, avoiding the need to replace with a stronger magnet, or the inability to find a magnet of the appropriate magnetic strength, or the need to adjust the current input to the electromagnet. Conversely, if the generated high-frequency alternating magnetic field is not adjusted and controlled, some larger non-ferrous metal fragments will not be repelled and will fly out, failing to achieve the effect of accurate classification. Similarly, it is understandable that if non-ferrous metal fragments are not sieved, different sizes of the same metal will fly different distances under the action of the same intensity of high-frequency alternating magnetic field, which may lead to mixing with other non-ferrous metals, also failing to achieve the effect of accurate classification.

[0051] In some alternative embodiments, such as Figure 5 , Figure 6As shown, the telescopic assembly specifically includes a second driving member 410 and a turntable 420. The second driving member 410 is fixed on the rotating base 330 and is connected to the turntable 420 in a transmission manner, so that the second driving member 410 can drive the turntable 420 to rotate relative to the rotating base 330. The rotating base 330 is provided with a first straight groove 331 radiating radially therefrom, and the turntable 420 is provided with an arc groove 421 radiating radially therefrom. The arc groove 421 corresponds to the position of the first straight groove 331. The first magnetic pole member 340 is provided with a rod portion 341. The rotating base 330 is provided with a sliding cavity 332. The rod portion 341 is sleeved in the sliding cavity 332. The sliding cavity 332 communicates with the first straight groove 331. The rod portion 341 is provided with a first slider 3411. The first slider 3411 passes through both the arc groove 421 and the first straight groove 331. When the second driving member 410 drives the turntable 420 to rotate, it drives the first slider 3411 to slide along the extension direction of the arc-shaped groove 421. At the same time, the first slider 3411 moves horizontally along the length direction of the first straight groove 331, ultimately causing the rod 341 to move within the sliding cavity 332. In this way, the first magnetic pole member 340 can perform telescopic movement relative to the rotating base 330. In this embodiment, optionally, the second driving member 410 can be a rotary motor.

[0052] If the aperture distribution of each layer of screen 110 is relatively large, non-ferrous metal fragments belonging to the same particle size range on the same layer of screen 110 may exhibit uneven distribution. This results in significant differences in particle size among some non-ferrous metal fragments. Consequently, under the influence of a high-frequency alternating magnetic field of the same intensity, the leap distance of the same type of non-ferrous metal fragments with different particle sizes will show a large distribution deviation, ultimately leading to low purity of each non-ferrous metal collected. Therefore, in some optional embodiments, such as... Figure 1 As shown, a grading mechanism 500 is also provided between the discharge port 130 corresponding to each layer of screen 110 and the conveyor belt 200.

[0053] Specifically, the grading mechanism 500 includes a third drive member 510 and multiple closed loop belts 520 radiating uniformly from one side of the conveyor belt 200's width direction to the other side of the conveyor belt 200's width direction. It should be noted that the aforementioned width direction of the conveyor belt 200 refers to the direction perpendicular to its conveying direction, and "uniformly" means that, viewed from the same longitudinal position (perpendicular to the conveying direction of the conveyor belt 200) of each closed loop belt 520, the spacing between adjacent closed loop belts 520 is consistent. Viewed from the transverse position (parallel to the conveying direction of the conveyor belt 200) of the entire closed loop belt 520, the spacing between adjacent closed loop belts 520 gradually increases. The third drive member 510 is driveably connected to the closed loop belts 520, so that the third drive member 510 can drive the closed loop belts 520 to rotate cyclically, thereby moving the non-ferrous metal scraps. When non-ferrous metal fragments of the same particle size range on one of the screens 110 fall onto the closed loop belt 520 below, the smaller fragments fall first from the gaps in the closed loop belt 520 onto the conveyor belt 200 below. Similarly, the larger fragments fall sequentially onto the conveyor belt 200 below. Since the moving direction of the closed loop belt 520 is perpendicular to the conveying direction of the conveyor belt 200, it is equivalent to the particle size of the non-ferrous metal fragments in the width region of the conveyor belt 200 being separated sequentially. In this way, during eddy current separation, the eddy current separation area can be divided into multiple action sections. Each action section uses a high-frequency alternating magnetic field of the same intensity, and the change in the intensity of the high-frequency alternating magnetic field can be controlled and adjusted by the telescopic component. Correspondingly, multiple eddy current components need to be set, and each eddy current component rotates coaxially. This coaxial rotation can be achieved by sharing a common rotating shaft 320, or by setting a separate rotating shaft 320, but all rotating shafts 320 are set coaxially to ensure magnetic field stability. In addition, the number of corresponding telescopic components is at least equal to the number of eddy current components. In this embodiment, optionally, the third driving component 510 can be a rotary motor.

[0054] To prevent interference between the magnetic fields generated at both ends of each eddy current component, and to prevent the magnetic fields of different intensities between different action sections from affecting the eddy current sorting process of non-ferrous metal debris of different particle sizes, in some optional embodiments, a magnetic shielding plate (not shown in the figures) is provided between adjacent eddy current components. Specifically, the magnetic shielding plate can be made of a non-magnetic material, and the height of the magnetic shielding plate is greater than the maximum height that the first magnetic pole 340 can extend to and the maximum value of the height of the first magnetic pole 340.

[0055] Since the closed conveyor belt 520 generally has a certain degree of elasticity, in order to prevent non-ferrous metal debris that falls in a certain local area from getting stuck between two adjacent closed conveyor belts 520, for example, non-ferrous metal debris with a large aspect ratio that is laterally stuck between two closed conveyor belts 520, and then being carried to a certain local area with a larger falling particle size as the closed conveyor belt 520 rotates, leading to a final sorting error, in some optional embodiments, such as Figure 8 , Figure 9 As shown, the grading mechanism 500 also includes a torsion structure 530 for driving the closed loop belt 520 to rotate. Specifically, the torsion structure 530 includes a telescopic drive member 531, a telescopic rod 532, a limiting member 533, a sleeve 534, and a clamping block 535. The telescopic drive member 531 is connected to the telescopic rod 532 to drive the telescopic rod 532 to move up and down. The sleeve 534 is provided with a second straight groove 5341. The telescopic rod 532 is slidably disposed in the second straight groove 5341. In order to prevent the telescopic rod 532 from disengaging from the opening side of the second straight groove 5341, the internal dimension of the second straight groove 5341 can be set to be larger than the dimension of its opening side. The limiting member 533 is disposed on the telescopic rod 532. At the upper end, the telescopic rod 532 extends into the second straight groove 5341. The outer wall of the clamping block 535 is provided with a spiral groove 5351. The middle part of the clamping block 535 is provided with a limiting hole 5352 to prevent the closed ring belt 520 from rotating. The limiting member 533 extends from the opening side of the second straight groove 5341, and its extended part is finally inserted into the spiral groove 5351. The insertion here can be that the limiting member 533 contacts the side wall of the spiral groove 5351 but does not contact the bottom wall of the spiral groove 5351, or it can be that it contacts both the bottom wall and the side wall of the spiral groove 5351 at the same time. In this embodiment, the telescopic drive member 531 drives the telescopic rod 532 to move up and down within the second straight slide groove 5341, and the limiting member 533 also moves up and down accordingly. Since one end of the limiting member 533 is limited within the spiral groove 5351, this will drive the clamping block 535 to rotate in both directions, thus twisting the closed loop belt 520. Optionally, the telescopic drive member 531 can be a telescopic motor, telescopic cylinder, or other similar device. In addition, to ensure the effect, multiple torsion structures 530 can be provided at intervals on each closed loop belt 520. In actual use, the torsion structures 530 on two adjacent closed loop belts 520 can twist in the same direction or in opposite directions. It can be understood that different torsion structures 530 on a certain closed loop belt 520 can also twist in the same direction or in opposite directions.

[0056] Preferably, the rotation plane of the closed loop belt 520 is perpendicular to its conveying direction to ensure smooth conveying of the closed loop belt 520.

[0057] If the top of the closed conveyor belt 520 is flat, then non-ferrous metal debris on the screen 110 may fall precisely onto the top of the closed conveyor belt 520 and be carried to a localized area with a larger particle size as the closed conveyor belt 520 rotates, leading to final sorting errors. In some optional embodiments, such as... Figure 9 As shown, the top of the closed loop 520 is provided with an arc-shaped protrusion 521.

[0058] When non-ferrous metal fragments from screen 110 fall onto the grading mechanism 500, similar or dissimilar non-ferrous metals of similar particle size may fall simultaneously within the same small area. This can cause them to accumulate in localized areas of the conveyor belt 200, affecting the sorting accuracy during eddy current separation, especially when the non-ferrous metal particle size is large. Therefore, in some optional embodiments, such as... Figure 10 As shown, a dispersing mechanism 600 is provided between the grading mechanism 500 and the conveyor belt 200. The dispersing mechanism 600 includes a fourth driving member 610, a base 620, multiple pallets 630 arranged side by side, and a limiting plate 640. The fourth driving member 610 is fixed on the base 620. Optionally, the fourth driving member 610 is a motor screw drive mechanism. The pallets 630 are slidably disposed on the base 620, and the sliding direction is parallel to the conveying direction of the conveyor belt 200. Optionally, sliders can be provided on the pallets 630, and corresponding guide rails can be provided on the base 620. By assembling the two, the horizontal sliding function can be achieved. The upper end of the pallet 630 is provided with a second slider 631. The limiting plate 640 is provided with a third straight groove 641 in the same number as the pallets 630. The second slider 631 passes through the third straight groove 641, so that the second slider 631 only slides along the extension direction of the third straight groove 641. To achieve a linear increase in the distance between multiple support plates 630, the interval between adjacent third straight slide grooves 641 is set to increase linearly from top to bottom. At this time, all the third straight slide grooves 641 are arranged radially upwards. The motor screw drive mechanism is threadedly connected to the limiting plate 640. When the motor screw drive mechanism is activated, the limiting plate 640 can move up and down, thereby driving the second slider 631 to slide along the extension direction of the third straight slide groove 641. Since the support plates 630 are slidably mounted on the base 620, the support plates 630 are separated or brought closer together.

[0059] In this embodiment, during actual use, multiple pallets 630 are first placed close together or with a corresponding width. The corresponding width refers to the minimum size of the falling non-ferrous metal fragments. When the number of falling non-ferrous metal fragments reaches a certain level, the falling of non-ferrous metal fragments stops, and the fourth drive unit 610 starts to operate, causing the pallets 630 to separate from each other. At this time, the non-ferrous metal fragments on the pallets 630 are also separated accordingly until the non-ferrous metal fragments are completely placed on the conveyor belt 200. At this time, the non-ferrous metal fragments at the same longitudinal position on the conveyor belt 200 are in a dispersed state or not piled up. Afterward, the fourth drive unit 610 operates, causing the pallets 630 to move closer to each other until they return to their initial state. It can be understood that multiple dispersing mechanisms 600 can also be set up for rotation to reduce the waiting time when the falling non-ferrous metal fragments stop, thereby improving work efficiency.

[0060] Despite the use of the vibrating screen 100, very large non-ferrous metal fragments may still exist, which are difficult to classify using eddy current separation. Therefore, in some optional embodiments, the non-ferrous metal fragment recycling and sorting device further includes an image recognition device (not shown in the figures) and a sorting device (not shown in the figures) electrically connected to each other. The image recognition device can identify non-ferrous metal fragments conveyed on the conveyor belt 200 in real time. When abnormal non-ferrous metal fragments are detected, the device immediately notifies the sorting device and sends the real-time location of the abnormal fragments to the sorting device. The sorting device moves to the corresponding calculated location based on this data and removes the abnormal non-ferrous metal fragments. Furthermore, the sorted non-ferrous metal fragments can be manually classified, or automatically sorted using a spectrometer and a robot.

[0061] In some alternative embodiments, such as Figure 11As shown, the pitch adjustment mechanism 120 includes a pitch-changing slide 121 and a fifth driving member 122. The pitch-changing slide 121 is fixedly connected to the vibrating screen 100. A screw 1211 is provided inside the pitch-changing slide 121, and a pitch-changing groove 1212 is provided on the screw 1211. A connecting rod 1213 is provided between the two ends of the pitch-changing slide 1211. A protrusion 1214 slides on the connecting rod 1213. One end of the protrusion 1214 is inserted into the pitch-changing groove 1212, and the other end of the protrusion 1214 is used to connect the warp and weft threads of the screen 110. The warp and weft threads of the screen 110 intersect to form a mesh structure. Therefore, the number and position of the pitch adjustment mechanisms 120 around the screen are determined according to the specific shape of the screen 110. The fifth driving member 122 is disposed on the pitch-changing slide 121 to drive the screw 1211 to rotate. When it is necessary to change the aperture of the screen 110, the screw 1211 is driven to rotate in both directions by the fifth driving member 122. Since the protrusion 1214 is always in contact with the variable pitch groove 1212, the distance between adjacent warp or weft threads of the screen 110 can be made smaller or larger, thereby achieving the purpose of adjustable aperture of the screen 110. In this embodiment, the fifth driving member 122 may optionally be a rotary motor.

[0062] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," 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 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.

[0063] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A sorting and recycling device for non-ferrous metal scrap, characterized in that, The sorting and recycling device for non-ferrous metal scrap includes: The vibrating screen is equipped with multiple layers of screens with decreasing aperture from top to bottom, a discharge port, and an adjustment mechanism. The discharge port is used to discharge non-ferrous metal scraps from each layer of the screens, and the adjustment mechanism is used to adjust the aperture of the screens. Multiple conveyor belts, the number of which is equal to the number of discharge ports, and the input side of each conveyor belt corresponds one-to-one with the position of each discharge port; An eddy current assembly is disposed inside the roller on the output side of the conveyor belt. The eddy current assembly includes a first driving member, a rotating shaft, a rotating base, a first magnetic pole member, and a second magnetic pole member. The first driving member is connected to the rotating shaft in a driving manner. The rotating base is fixed on the rotating shaft. Multiple first magnetic pole members are provided and spaced apart along the circumferential edge of the rotating base. The first magnetic pole members slide on the rotating base. The second magnetic pole members are fixed on the rotating base. A telescopic assembly is provided on the rotating base for driving the first magnetic pole piece to move horizontally outward and inward along the radial direction of the rotating base, and the second magnetic pole piece fills the gap between adjacent first magnetic pole pieces; The telescopic assembly includes a connected second driving member and a turntable. The second driving member is fixed on the rotating base and is used to drive the turntable to rotate relative to the rotating base. The first magnetic pole member has a rod portion. The rotating base is provided with a sliding cavity and a first straight sliding groove that radiates radially therefrom. The sliding cavity communicates with the first straight sliding groove. The turntable is provided with an arc-shaped groove that radiates radially therefrom and corresponds to the position of the first straight sliding groove. The rod portion is sleeved in the sliding cavity. The rod portion is provided with a first slider. The first slider passes through both the arc-shaped groove and the first straight sliding groove. The pitch adjustment mechanism includes a pitch-changing slide table and a fifth driving member disposed on the pitch-changing slide table. The pitch-changing slide table is fixedly connected to the vibrating screening machine and has a screw inside it. The screw has a pitch-changing groove. A connecting rod is provided between the two sides of the pitch-changing slide table. A protrusion is slidably disposed on the connecting rod. One end of the protrusion is inserted into the pitch-changing groove, and the other end of the protrusion is used to connect the warp and weft wires of the screen. The fifth driving member is drivenly connected to the screw.

2. The sorting and recycling device for non-ferrous metal scraps according to claim 1, characterized in that, The discharge port and the conveyor belt are also provided with a grading mechanism. The grading mechanism includes a third driving member and a plurality of closed loop belts that radiate uniformly from one side of the width direction of the conveyor belt to the other side of the width direction of the conveyor belt, and the interval between adjacent closed loop belts gradually increases. The third driving member is connected to the closed loop belts to drive the closed loop belts to rotate. A plurality of vortex components are provided, and the plurality of vortex components rotate coaxially. The number of telescopic components is at least equal to the number of vortex components.

3. The sorting and recycling device for non-ferrous metal scraps according to claim 2, characterized in that, The grading mechanism further includes a torsion structure for driving the closed loop belt to rotate. The torsion structure includes a telescopic drive member, a telescopic rod, a limiting member, a sleeve, and a clamping block. The telescopic drive member is connected to the telescopic rod to drive the telescopic rod to move up and down. The sleeve is provided with a second straight groove, and the telescopic rod is slidably disposed in the second straight groove. The limiting member is disposed at one end of the telescopic rod that extends into the second straight groove. The outer wall of the clamping block is provided with a spiral groove, and the middle part of the clamping block is provided with a limiting hole to prevent the closed loop belt from rotating. The limiting member extends out of the second straight groove and is inserted into the spiral groove.

4. The sorting and recycling device for non-ferrous metal scraps according to claim 3, characterized in that, The plane of rotation of the closed loop is perpendicular to its transmission direction.

5. The sorting and recycling device for non-ferrous metal scrap according to any one of claims 2 to 4, characterized in that, The closed loop is provided with an arc-shaped protrusion.

6. The sorting and recycling device for non-ferrous metal scrap according to any one of claims 2 to 4, characterized in that, A dispersing mechanism is provided between the grading mechanism and the conveyor belt. The dispersing mechanism includes a fourth driving member, a base, multiple pallets arranged side by side, and a limiting plate. The fourth driving member is fixed on the base and is pulsatorically connected to the limiting plate. The pallets are slidably disposed on the base. One end of the pallet is provided with a second slider. The limiting plate is provided with a third straight groove equal in number to the pallets. The second slider is limited to pass through the third straight groove. The interval between adjacent third straight grooves increases linearly outward in the direction away from the pallet.

7. The sorting and recycling device for non-ferrous metal scraps according to claim 2, characterized in that, A magnetic shielding plate is provided between adjacent eddy current components.

8. The sorting and recycling device for non-ferrous metal scrap according to any one of claims 1 to 4, characterized in that, The non-ferrous metal scrap recycling sorting and recycling device also includes an image recognition device and a sorting device that are electrically connected to each other. The image recognition device is used to identify non-ferrous metal scraps of abnormal size conveyed on the conveyor belt, and the sorting device is used to sort the non-ferrous metal scraps of abnormal size identified by the image recognition device separately.

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