Waste circuit board metal recovery device with multi-stage sorting function

Abstract

The invention discloses a waste circuit board metal recovery device with a multi-stage sorting function, and relates to the technical field of circuit board recovery. The device comprises a box body, crushing equipment is arranged in an inner cavity of the box body, a conveying cylinder is arranged at the bottom of the crushing equipment, a driving motor is fixedly connected to one side of the box body, and an output shaft of the driving motor is fixedly connected with a first rotating shaft. Through series connection design of the magnetic separation screening mechanism (an electromagnet and a screening cylinder) and the grading screening mechanism (a three-layer screening plate), ferromagnetic metal is adsorbed by the electromagnet firstly, then the metal is graded through the three-layer screening plate with gradually-decreased screening holes, refined full-amount recovery of metal particles is achieved, the recovery rate is increased, the inner diameter of the screening cylinder is designed in a gradually-changed mode (the left portion is small and the right portion is large), and the screening efficiency is improved. Combined with the centrifugal force effect, the particle residence time is prolonged, the electromagnet adsorption coverage is enhanced, the cam drives the screening box to transversely vibrate, and the screening dynamic stability is optimized in cooperation with a spring damping system.

Description

Technical Field

[0001] This invention belongs to the field of circuit board recycling technology, and in particular relates to a waste circuit board metal recycling device with multi-stage sorting function. Background Technology

[0002] With the development and progress of human civilization and technology, the consumption of mineral resources is increasing daily. Due to the increasing depletion of high-grade mineral resources, resource shortages arise in metal production processes, necessitating the extraction of metals from various ores and industrial waste. With the rapid pace of economic and information technology upgrades, the penetration rate of various electronic products is also increasing. These electronic products (such as computers and mobile phones) are quickly phased out, becoming "electronic waste," and the resulting electronic waste pollution poses a potential environmental threat. Various types of electronic waste commonly contain gold and other precious and base metals, especially copper. Copper is an important non-ferrous metal with wide applications in electrical, light industry, machinery manufacturing, construction, and defense industries. Recovering copper from waste circuit boards is of great practical significance. Currently, metal recycling mainly relies on crushing and sorting technologies.

[0003] However, existing equipment has significant drawbacks: incomplete metal separation: traditional magnetic separation equipment has low adsorption efficiency for non-ferrous metals (such as copper and aluminum), and particles are easily left in non-metallic materials; severe screen clogging: when the grading screen plate is vibrating, fine metal particles are easily stuck in the screen holes, requiring frequent shutdowns for cleaning, which reduces the efficiency of continuous operation; fragmented sorting process: the crushing, magnetic separation, and grading stages operate independently, the power system is redundant, and material transfer leads to metal loss.

[0004] To address these issues, we provide a waste circuit board metal recycling device with multi-stage sorting capabilities. Summary of the Invention

[0005] The purpose of this invention is to provide a waste circuit board metal recycling device with multi-stage sorting function. By combining a magnetic separation screening mechanism, a grading screening mechanism and a self-cleaning mechanism, it solves the problems of incomplete metal sorting, screen clogging and low sorting efficiency in existing waste circuit board metal recycling devices.

[0006] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution.

[0007] This invention relates to a waste circuit board metal recycling device with multi-stage sorting function, comprising a housing, a crushing device disposed within the housing cavity, a conveying cylinder disposed at the bottom of the crushing device, a drive motor fixedly connected to one side of the housing, and a first rotating shaft fixedly connected to the output shaft of the drive motor; a magnetic separation screening mechanism disposed within the housing cavity, comprising a screening cylinder rotatably connected to the housing cavity via a mounting rod and a bearing seat, an electromagnet disposed inside the screening cylinder, an energized block fixedly connected to one side of the electromagnet, and an conductive ring fixedly connected to the housing cavity via the mounting rod; a grading screening mechanism disposed within the housing cavity, comprising a screening box disposed within the housing cavity, a sieve plate disposed within the screening box cavity, and a discharge plate fixedly connected to one side of the sieve plate; a self-cleaning mechanism disposed within the screening box cavity, comprising a reciprocating lead screw rotatably connected to the screening box cavity via a bearing seat, a threaded sleeve threadedly connected to the surface of the reciprocating lead screw, a fixing block fixedly connected to the surface of the threaded sleeve, and a clearing rod disposed inside the fixing block.

[0008] The present invention is further configured such that a conveying roller is connected to the surface of the first rotating shaft via a synchronous component, one end of the conveying cylinder extends into the inner cavity of the screening cylinder, the conveying cylinder is located at the bottom of the crushing equipment, and conveys particles to the sorting area.

[0009] The invention is further configured such that a first bevel gear is fixedly connected to the surface of the first rotating shaft, a second bevel gear meshes with the surface of the first bevel gear, a second rotating shaft is fixedly connected to the shaft center of the second bevel gear, a worm gear is driven to the surface of the second rotating shaft through a synchronization component, a worm wheel meshes with the surface of the worm gear, a first transmission cylinder is fixedly connected to the shaft center of the worm wheel, a drive motor provides power, and its output shaft is fixedly connected to the first rotating shaft. The first rotating shaft fixes the first bevel gear, which meshes with the second bevel gear. The second bevel gear drives the second rotating shaft to rotate, and then the second rotating shaft drives the worm gear through the synchronization component. The worm gear meshes with the worm wheel, and the worm wheel fixes the first transmission cylinder, ensuring that the conveyor belt conveying speed matches the rotation speed of the screening cylinder.

[0010] The present invention is further configured such that a conveyor belt is driven to the surface of the first transmission cylinder, a second transmission cylinder is driven to the surface of the first transmission cylinder via the conveyor belt, one side of the first transmission cylinder is fixedly connected to one side of the crushing equipment via a mounting bracket, a scraper is provided on one side of the second transmission cylinder, and a conveying channel is fixedly connected to the inner cavity of the box. The scraper automatically peels off metal particles and guides the metal material into a grading and screening mechanism.

[0011] The invention is further configured such that a drive gear is fixedly connected to the surface of the first rotating shaft, and a toothed ring meshes with the surface of the drive gear. The inner side of the toothed ring is fixedly connected to the surface of the screening cylinder. The inner diameter of the screening cylinder increases from left to right. The first rotating shaft drives the screening cylinder to rotate through the drive gear and the toothed ring. The inner diameter of the screening cylinder increases from left to right. The particles move to the right under the action of centrifugal force. The increase in inner diameter reduces the centrifugal force and improves the metal adsorption rate.

[0012] The invention is further configured such that a cam is fixedly connected to the surface of the first rotating shaft, a partition is fixedly connected to the inner cavity of the box, a fixed plate is fixedly connected to one side of the partition, a slide rod is fixedly connected to one side of the fixed plate, a sliding sleeve is slidably connected to the surface of the slide rod, a drive plate is fixedly connected to the surface of the sliding sleeve, a drive wheel is fixedly connected to one side of the drive plate, a drive block is fixedly connected to one side of the screening box, and a first spring is sleeved on the surface of the slide rod. The first rotating shaft drives the cam to rotate, the cam pushes the drive plate to drive the drive wheel, the drive wheel cooperates with the drive block on the side of the screening box, the slide rod is sleeved with the first spring, and the first spring sliding sleeve acts to ensure that the drive plate is reset. The slide rod and the sliding sleeve limit the drive plate to make its movement more stable. The cam drives the screening box to vibrate left and right, improving the screening efficiency.

[0013] The invention is further configured such that a telescopic rod is fixedly connected to the inner side of the box, the other end of the telescopic rod is fixedly connected to one side of the screening box, a second spring is sleeved on the surface of the telescopic rod, a support pulley is fixedly connected to the bottom of the screening box, the telescopic rod connects the box body and the screening box, and a second spring is sleeved on its surface. The second spring drives the screening box to reset, and a support pulley is provided at the bottom of the screening box to reduce frictional wear when the screening box moves left and right.

[0014] The present invention is further configured such that a support plate is fixedly connected to the inner cavity of the screening box, a third spring is fixedly connected to one side of the support plate, the other end of the third spring is fixedly connected to one side of the sieve plate, a vibration motor is fixedly connected to one side of the sieve plate, a collection box is provided in the inner cavity of the screening box, the support plate is connected to the sieve plate through the third spring, a vibration motor is provided on the bottom side of the sieve plate, and the vibration motor cooperates with the third spring to enhance the vibration frequency of the sieve plate and improve the sorting accuracy.

[0015] The invention is further configured such that a slide cylinder is slidably connected to the surface of the first rotating shaft, and a slider is fixedly connected to the surface of the first rotating shaft. A groove adapted to the slider is opened on the inner side of the slide cylinder. One side of the slide cylinder is fixedly connected to the reciprocating lead screw extending to one end of the outer side of the screening box. The first rotating shaft, through the cooperation of the slider and the groove of the slide cylinder, causes the slide cylinder to rotate during the movement of the sliding sleeve shaft, thus ensuring the continuity of power transmission during the left and right movement of the screening box.

[0016] The invention is further configured such that a fourth spring is sleeved on the surface of the unblocking rod, one end of the fourth spring is fixedly connected to the inner side of the fixed block, and the other end of the fourth spring is fixedly connected to a guide plate. A guide wheel is fixedly connected to one side of the guide plate. An arc plate is fixedly connected to the inner cavity of the screening box. A sliding cylinder fixes a reciprocating screw, converting the rotation of the first rotating shaft into the rotation of the reciprocating screw without additional power. The reciprocating screw drives the fixed block to move through the screw sleeve, and the fixed block drives the guide wheel to move. When the guide wheel rolls along the arc plate, it compresses the fourth spring, causing the unblocking rod to insert into the screen hole of the screen plate. The screen hole is cleaned in real time by the up-and-down movement of the unblocking rod.

[0017] The present invention has the following beneficial effects.

[0018] 1. This invention utilizes a series design of a magnetic separation screening mechanism (electromagnet and screening cylinder) and a grading screening mechanism (three-layer sieve plate). First, the electromagnet attracts ferromagnetic metals, and then the metals are graded by the three-layer sieve plate with gradually decreasing sieve holes, achieving fine and complete recovery of metal particles and improving the recovery rate. The screening cylinder has a gradually changing inner diameter design (smaller on the left and larger on the right), which, combined with centrifugal force, extends the particle retention time and enhances the electromagnet adsorption coverage. The cam drives the screening box to vibrate laterally, and the spring damping system optimizes the dynamic stability of the screening.

[0019] 2. This invention designs a self-cleaning mechanism. The reciprocating screw driven by the first rotating shaft moves the screw sleeve. The unblocking rod on the fixed block, in cooperation with the fourth spring and the arc plate, is vertically inserted into the screen hole and moves in a high-frequency reciprocating motion to break up the blocked metal particles in real time and ensure screening efficiency.

[0020] 3. This invention uses a drive motor to synchronously drive the magnetic separator to rotate (via drive gear and toothed ring), the conveyor belt to run (via bevel gear set, worm and worm wheel), the screening box to vibrate (via cam, drive wheel and drive block), and the self-cleaning mechanism to run (via slide and reciprocating screw). The integrated power design reduces energy consumption and avoids multi-motor coordination errors.

[0021] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0023] Figure 1 This is a perspective view of a waste circuit board metal recycling device with multi-stage sorting function.

[0024] Figure 2 This is a schematic diagram of the internal structure of a box in a waste circuit board metal recycling device with multi-stage sorting function.

[0025] Figure 3 This is a diagram showing the assembly of a worm gear and worm wheel in a waste circuit board metal recycling device with multi-stage sorting function.

[0026] Figure 4 This is a diagram showing the assembly of the drive wheel and drive block in a waste circuit board metal recycling device with multi-stage sorting function.

[0027] Figure 5 This is a cross-sectional view of a screening box in a waste circuit board metal recycling device with multi-stage sorting function.

[0028] Figure 6 This is a diagram showing the assembly of a reciprocating lead screw and a lead sleeve in a waste circuit board metal recycling device with multi-stage sorting function.

[0029] Figure 7 This diagram shows the unblocking rod and guide plate in a waste circuit board metal recycling device with multi-stage sorting function.

[0030] Figure 8 This is a cross-sectional view of the conveyor cylinder in a waste circuit board metal recycling device with multi-stage sorting function.

[0031] In the attached diagram: 1. Box body; 2. Crushing equipment; 3. Conveying cylinder; 4. Drive motor; 5. First rotating shaft; 6. Screening cylinder; 7. Electromagnet; 8. Electrostatic block; 9. Conductive ring; 10. Screening box; 11. Screen plate; 12. Discharge plate; 13. Reciprocating screw; 14. Screw sleeve; 15. Fixing block; 16. Unblocking rod; 17. Conveying roller; 18. First bevel gear; 19. Second bevel gear; 20. Second rotating shaft; 21. Worm gear; 22. Worm wheel; 23. First transmission cylinder; 24. Conveyor belt; 25. Second transmission cylinder; 26. Scraper plate 27. Conveying channel; 28. Drive gear; 29. ​​Toothed ring; 30. Cam; 31. Partition plate; 32. Fixing plate; 33. Slide rod; 34. Sliding sleeve; 35. Drive plate; 36. Drive wheel; 37. Drive block; 38. First spring; 39. Telescopic rod; 40. Second spring; 41. Support pulley; 42. Support plate; 43. Third spring; 44. Vibration motor; 45. Collection box; 46. Slide cylinder; 47. Slider; 48. Slide groove; 49. Fourth spring; 50. Guide plate; 51. Guide wheel; 52. Curved plate. Detailed Implementation

[0032] The technical solutions of the present invention will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] Example 1

[0034] Please see Figures 1-8This invention relates to a waste circuit board metal recycling device with multi-stage sorting function, comprising a housing 1, a crushing device 2 disposed inside the housing 1, a conveying cylinder 3 disposed at the bottom of the crushing device 2, a drive motor 4 fixedly connected to one side of the housing 1, and a first rotating shaft 5 fixedly connected to the output shaft of the drive motor 4; a magnetic separation screening mechanism disposed inside the housing 1, the magnetic separation screening mechanism comprising a screening cylinder 6 rotatably connected to the housing 1 via a mounting rod and a bearing seat, an electromagnet 7 disposed inside the screening cylinder 6, an energized block 8 fixedly connected to one side of the electromagnet 7, and a conductive ring 9 fixedly connected to the housing 1 via a mounting rod; a conveying roller 17 is connected to the surface of the first rotating shaft 5 via a synchronous component; one end of the conveying cylinder 3 extends into the interior of the screening cylinder 6; a first bevel gear 18 is fixedly connected to the surface of the first rotating shaft 5, and the surfaces of the first bevel gear 18 are meshed. There is a second bevel gear 19, and a second rotating shaft 20 is fixedly connected to the shaft of the second bevel gear 19. A worm gear 21 is connected to the surface of the second rotating shaft 20 through a synchronous component. A worm wheel 22 meshes with the surface of the worm gear 21. A first transmission cylinder 23 is fixedly connected to the shaft of the worm wheel 22. A conveyor belt 24 is connected to the surface of the first transmission cylinder 23 through the conveyor belt 24. A second transmission cylinder 25 is connected to the surface of the first transmission cylinder 23 through the conveyor belt 24. One side of the first transmission cylinder 23 is fixedly connected to one side of the crushing equipment 2 through a mounting bracket. A scraper 26 is provided on one side of the second transmission cylinder 25. A conveying channel 27 is fixedly connected to the inner cavity of the housing 1. A drive gear 28 is fixedly connected to the surface of the first rotating shaft 5. A toothed ring 29 meshes with the surface of the drive gear 28. The inner side of the toothed ring 29 is fixedly connected to the surface of the screening cylinder 6. The inner diameter of the screening cylinder 6 increases from left to right.

[0035] Further details: The synchronization component includes a synchronization pulley and a synchronization belt to facilitate continuous power transmission. The crushing device 2 is used to crush the circuit board into particles, improving subsequent sorting efficiency. The conveyor cylinder 3 is located at the bottom of the crushing device 2, conveying the particles to the sorting area. The drive motor 4 provides power, and its output shaft is fixedly connected to the first rotating shaft 5. When the energized block 8 contacts the conductive ring 9, the electromagnet 7 is energized to attract metal particles. When it detaches, the power is cut off, releasing the metal. The metal falls onto the surface of the conveyor belt 24 under gravity, achieving automatic sorting. The plastic particles are conveyed to the next process through the conveying channel 27. The first rotating shaft 5 is connected to the conveyor roller 17 through the synchronization component. The conveyor cylinder 3 extends into the inner cavity of the screening cylinder 6, ensuring that the particles are directly fed from the crushing device 2. Upon entering the magnetic separation area, to reduce intermediate losses, the first rotating shaft 5 fixes the first bevel gear 18, which meshes with the second bevel gear 19. The second bevel gear 19 drives the second rotating shaft 20 to rotate. Then, the second rotating shaft 20 drives the worm gear 21 through the synchronization component. The worm gear 21 meshes with the worm wheel 22, and the worm wheel 22 fixes the first transmission cylinder 23, ensuring that the conveying speed of the conveyor belt 24 matches the rotation speed of the screening cylinder 6. The scraper 26 automatically peels off the metal particles and introduces the metal material into the grading and screening mechanism. The first rotating shaft 5 drives the screening cylinder 6 to rotate through the drive gear 28 and toothed ring 29. The inner diameter of the screening cylinder 6 increases from left to right. Under the action of centrifugal force, the particles move to the right. The increase in inner diameter reduces the centrifugal force and improves the metal adsorption rate.

[0036] Example 2

[0037] Please see Figures 1-8 Based on Embodiment 1, the inner cavity of the housing 1 is further provided with a grading and screening mechanism. The grading and screening mechanism includes a screening box 10 disposed in the inner cavity of the housing 1, a sieve plate 11 disposed in the inner cavity of the screening box 10, a discharge plate 12 fixedly connected to one side of the sieve plate 11, a cam 30 fixedly connected to the surface of the first rotating shaft 5, a partition plate 31 fixedly connected to the inner cavity of the housing 1, a fixing plate 32 fixedly connected to one side of the partition plate 31, a slide rod 33 fixedly connected to one side of the fixing plate 32, a sliding sleeve 34 slidably connected to the surface of the slide rod 33, a drive plate 35 fixedly connected to the surface of the sliding sleeve 34, and a drive wheel 36 fixedly connected to one side of the drive plate 35. A drive block 37 is fixedly connected to one side of the screening box 10. A first spring 38 is sleeved on the surface of the slide rod 33. A telescopic rod 39 is fixedly connected to the inside of the box body 1. The other end of the telescopic rod 39 is fixedly connected to one side of the screening box 10. A second spring 40 is sleeved on the surface of the telescopic rod 39. A support pulley 41 is fixedly connected to the bottom of the screening box 10. A support plate 42 is fixedly connected to the inner cavity of the screening box 10. A third spring 43 is fixedly connected to one side of the support plate 42. The other end of the third spring 43 is fixedly connected to one side of the sieve plate 11. A vibration motor 44 is fixedly connected to one side of the sieve plate 11. A collection box 45 is provided in the inner cavity of the screening box 10.

[0038] Further details: The inner cavity of the screening box 10 is equipped with three layers of screen plates 11 with progressively smaller screen apertures from top to bottom. Each layer of screen plate 11 is connected to a discharge plate 12, enabling multi-stage fine sorting of metal particles. The first rotating shaft 5 drives the cam 30 to rotate, and the cam 30 pushes the drive plate 35 to drive the drive wheel 36. The drive wheel 36 cooperates with the drive block 37 on the side of the screening box 10. The slide rod 33 is fitted with a first spring 38, and the first spring 38 is assisted by a sliding sleeve 34 to ensure that the drive plate 35 is reset. The slide rod 33 and the sliding sleeve 34 limit the drive plate 35, making it... The movement is more stable. The cam 30 drives the screening box 10 to vibrate left and right, improving screening efficiency. The telescopic rod 39 connects the box body 1 and the screening box 10. A second spring 40 is sleeved on its surface. The second spring 40 drives the screening box 10 to reset. The bottom of the screening box 10 is equipped with a support pulley 41 to reduce frictional loss when the screening box 10 moves left and right. The support plate 42 is connected to the screen plate 11 through the third spring 43. A vibration motor 44 is installed on the bottom side of the screen plate 11. The vibration motor 44, together with the third spring 43, enhances the vibration frequency of the screen plate 11 and improves the sorting accuracy.

[0039] Example 3

[0040] Please see Figures 1-8 Based on Embodiments 1 and 2, the inner cavity of the screening box 10 is provided with a self-cleaning mechanism. The self-cleaning mechanism includes a reciprocating screw 13 rotatably connected to the inner cavity of the screening box 10 via a bearing seat, a threaded sleeve 14 threaded to the surface of the reciprocating screw 13, a fixing block 15 fixedly connected to the surface of the threaded sleeve 14, a clearing rod 16 disposed inside the fixing block 15, a sliding cylinder 46 slidably connected to the surface of the first rotating shaft 5, a slider 47 fixedly connected to the surface of the first rotating shaft 5, a sliding groove 48 adapted to the slider 47 being opened inside the sliding cylinder 46, one side of the sliding cylinder 46 being fixedly connected to the reciprocating screw 13 extending to one end of the outer side of the screening box 10, a fourth spring 49 being sleeved on the surface of the clearing rod 16, one end of the fourth spring 49 being fixedly connected to the inner side of the fixing block 15, the other end of the fourth spring 49 being fixedly connected to a guide plate 50, one side of the guide plate 50 being fixedly connected to a guide wheel 51, and an arc plate 52 being fixedly connected to the inner cavity of the screening box 10.

[0041] Further supplement: The first rotating shaft 5 cooperates with the sliding groove 48 of the sliding cylinder 46 through the slider 47, so that when the axis of the sliding sleeve 34 moves, the first rotating shaft 5 drives the sliding cylinder 46 to rotate, ensuring the continuity of power transmission when the screening box 10 moves left and right. The sliding cylinder 46 fixes the reciprocating screw 13, converting the rotation of the first rotating shaft 5 into the rotation of the reciprocating screw 13 without the need for additional power. The reciprocating screw 13 drives the fixed block 15 to move through the screw sleeve 14. The fixed block 15 drives the guide wheel 51 to move. When the guide wheel 51 rolls along the arc plate 52, it compresses the fourth spring 49, so that the unblocking rod 16 is inserted into the screen hole of the screen plate 11. The screen hole is cleaned in real time by the up and down movement of the unblocking rod 16.

[0042] The working principle of this invention is as follows: waste circuit boards are placed in the crushing equipment 2, and the waste circuit boards are crushed into particles by the crushing equipment 2 and fall into the conveying cylinder 3. The drive motor 4 drives the first rotating shaft 5 to rotate, and synchronously drives the conveying roller 17 to send the crushed particles into the screening cylinder 6.

[0043] The first rotating shaft 5 drives the screening cylinder 6 to rotate via the drive gear 28 and toothed ring 29. When the energized block 8 rotates with the screening cylinder 6 and contacts the conductive ring 9, the electromagnet 7 is energized and attracts metal particles. The inner diameter of the screening cylinder 6 gradually increases from left to right. Under the action of centrifugal force, the particles fully contact the electromagnet 7, detach, and the power is cut off. The metal particles fall onto the conveyor belt 24. The first rotating shaft 5 drives the second rotating shaft 20 via the first bevel gear 18. Then, the second rotating shaft 20 drives the worm gear 21 through the synchronization component. The worm gear 21 meshes with the worm wheel 22, and the worm wheel 22 drives the first transmission cylinder 23 to rotate, ensuring that the conveying speed of the conveyor belt 24 matches the rotation speed of the screening cylinder 6. The worm gear 21 and worm wheel 22 drive the first transmission cylinder 23 to run the conveyor belt 24. The scraper 26 scrapes the metal particles into the conveying channel 27 and conveys them to the screening box 10.

[0044] The first rotating shaft 5 drives the cam 30 to rotate, and the cam 30 pushes the drive plate 35 to drive the drive wheel 36. The drive wheel 36 cooperates with the drive block 37 on the side of the screening box 10. The drive wheel 36 drives the screening box 10 to vibrate left and right through the drive block 37, thereby improving the screening efficiency. The three-layer screen plate 11 inside the screening box 10 classifies the metal particles, realizing multi-level fine sorting of metal particles. The second spring 40 drives the screening box 10 to reset. The support pulley 41 is used to reduce frictional loss when the screening box 10 moves left and right. The vibration motor 44 is started synchronously, and the amplitude is amplified by the third spring 43 to improve the screening effect.

[0045] The first rotating shaft 5 drives the reciprocating screw 13 through the slide cylinder 46. The reciprocating screw 13 drives the fixed block 15 to move through the screw sleeve 14. The fixed block 15 drives the guide wheel 51 to move. The guide wheel 51 undulates along the arc plate 52, pressing the fourth spring 49 so that the unblocking rod 16 is inserted vertically into the screen hole to complete the real-time unblocking and avoid the screen hole blockage leading to a reduction in screening effect.

[0046] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A waste circuit board metal recycling device with multi-stage sorting function, comprising a housing (1), characterized in that: The inner cavity of the box (1) is provided with a crushing device (2), the bottom of the crushing device (2) is provided with a conveying cylinder (3), a drive motor (4) is fixedly connected to one side of the box (1), and the output shaft of the drive motor (4) is fixedly connected to a first rotating shaft (5); The inner cavity of the box (1) is provided with a magnetic separation screening mechanism, which includes a screening cylinder (6) rotatably connected to the inner cavity of the box (1) via a mounting rod and a bearing seat, an electromagnet (7) disposed inside the screening cylinder (6), an energized block (8) fixedly connected to one side of the electromagnet (7), and an electric conduction ring (9) fixedly connected to the inner cavity of the box (1) via a mounting rod. The inner cavity of the box (1) is also provided with a grading and screening mechanism, which includes a screening box (10) provided in the inner cavity of the box (1), a sieve plate (11) provided in the inner cavity of the screening box (10), and a discharge plate (12) fixedly connected to one side of the sieve plate (11). The screening box (10) is equipped with a self-cleaning mechanism. The self-cleaning mechanism includes a reciprocating screw (13) rotatably connected to the screening box (10) through a bearing seat, a threaded sleeve (14) threaded to the surface of the reciprocating screw (13), a fixing block (15) fixedly connected to the surface of the threaded sleeve (14), and a dredging rod (16) disposed inside the fixing block (15).

2. The waste circuit board metal recycling device with multi-stage sorting function according to claim 1, characterized in that: The first rotating shaft (5) is connected to a conveying roller (17) via a synchronous component, and one end of the conveying cylinder (3) extends into the inner cavity of the screening cylinder (6).

3. A waste circuit board metal recycling device with multi-stage sorting function according to claim 1, characterized in that: A first bevel gear (18) is fixedly connected to the surface of the first rotating shaft (5), a second bevel gear (19) meshes with the surface of the first bevel gear (18), a second rotating shaft (20) is fixedly connected to the shaft center of the second bevel gear (19), a worm gear (21) is connected to the surface of the second rotating shaft (20) through a synchronous assembly, a worm wheel (22) meshes with the surface of the worm gear (21), and a first transmission cylinder (23) is fixedly connected to the shaft center of the worm wheel (22).

4. A waste circuit board metal recycling device with multi-stage sorting function according to claim 3, characterized in that: The first transmission cylinder (23) is connected to a conveyor belt (24) via a transmission connection. The first transmission cylinder (23) is connected to a second transmission cylinder (25) via the conveyor belt (24). One side of the first transmission cylinder (23) is fixedly connected to one side of the crushing equipment (2) via a mounting bracket. One side of the second transmission cylinder (25) is provided with a scraper (26). The inner cavity of the box (1) is fixedly connected to a conveying channel (27).

5. A waste circuit board metal recycling device with multi-stage sorting function according to claim 1, characterized in that: A drive gear (28) is fixedly connected to the surface of the first rotating shaft (5), and a toothed ring (29) meshes with the surface of the drive gear (28). The inner side of the toothed ring (29) is fixedly connected to the surface of the screening cylinder (6), and the inner diameter of the screening cylinder (6) increases from left to right.

6. A waste circuit board metal recycling device with multi-stage sorting function according to claim 1, characterized in that: A cam (30) is fixedly connected to the surface of the first rotating shaft (5), a partition (31) is fixedly connected to the inner cavity of the box (1), a fixing plate (32) is fixedly connected to one side of the partition (31), a slide rod (33) is fixedly connected to one side of the fixing plate (32), a sliding sleeve (34) is slidably connected to the surface of the slide rod (33), a drive plate (35) is fixedly connected to the surface of the sliding sleeve (34), a drive wheel (36) is fixedly connected to one side of the drive plate (35), a drive block (37) is fixedly connected to one side of the screening box (10), and a first spring (38) is sleeved on the surface of the slide rod (33).

7. A waste circuit board metal recycling device with multi-stage sorting function according to claim 1, characterized in that: A telescopic rod (39) is fixedly connected to the inside of the box (1). The other end of the telescopic rod (39) is fixedly connected to one side of the screening box (10). A second spring (40) is sleeved on the surface of the telescopic rod (39). A support pulley (41) is fixedly connected to the bottom of the screening box (10).

8. A waste circuit board metal recycling device with multi-stage sorting function according to claim 1, characterized in that: A support plate (42) is fixedly connected to the inner cavity of the screening box (10). A third spring (43) is fixedly connected to one side of the support plate (42). The other end of the third spring (43) is fixedly connected to one side of the sieve plate (11). A vibration motor (44) is fixedly connected to one side of the sieve plate (11). A collection box (45) is provided in the inner cavity of the screening box (10).

9. A waste circuit board metal recycling device with multi-stage sorting function according to claim 1, characterized in that: A slide cylinder (46) is slidably connected to the surface of the first rotating shaft (5), and a slider (47) is fixedly connected to the surface of the first rotating shaft (5). A slide groove (48) adapted to the slider (47) is opened on the inner side of the slide cylinder (46). One side of the slide cylinder (46) is fixedly connected to the reciprocating screw (13) through to one end of the outer side of the screening box (10).

10. A waste circuit board metal recycling device with multi-stage sorting function according to claim 1, characterized in that: A fourth spring (49) is sleeved on the surface of the unblocking rod (16). One end of the fourth spring (49) is fixedly connected to the inner side of the fixing block (15). The other end of the fourth spring (49) is fixedly connected to a guide plate (50). A guide wheel (51) is fixedly connected to one side of the guide plate (50). An arc plate (52) is fixedly connected to the inner cavity of the screening box (10).

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