Multi-stage crushing mechanism for recycling copper powder of waste circuit board

Abstract

The invention relates to the technical field of crushing devices, in particular to a multi-stage crushing mechanism for waste circuit board copper powder recycling, which comprises a workbench, a first conveying belt is mounted at the upper end of the workbench, and a first crushing mechanism is mounted at the position, close to the rear end, of the upper end of the workbench; a second material crushing mechanism is installed at the position, close to the middle, of the upper end of the workbench, a collecting mechanism is installed at the position, close to the front end, of the upper end of the workbench, an electromagnetic shaft is rotationally connected to the inner side of the workbench, and a scraping plate is fixedly connected to the position, in front of the electromagnetic shaft, of the inner side of the workbench. The crushing saw blade moves back and forth along the limiting plate, the crushing saw blade comprehensively crushes the chippings, more copper particles are separated from the non-metal chippings, the follow-up recovery efficiency is improved, and through mutual cooperation of the spraying head and the acid liquor box, the crushing saw blade can spray an acid solution downwards during crushing, so that oxides on the surfaces of the copper particles are cleaned.

Description

Technical Field

[0001] The invention relates to the technical field of crushing devices, in particular to a multi-stage crushing mechanism for recycling copper powder of waste circuit boards. Background Art

[0002] Waste circuit boards are a mixture of glass fiber reinforced resin and various metals. They are typical electronic waste. The copper metal content on the waste circuit boards is relatively high. If they can be properly utilized, they have a high recycling value.

[0003] The existing copper powder recycling will use electrostatic sorting, but the circuit board is not completely crushed, which will cause the copper particles to stick to the non-magnetic debris, thereby reducing the recovery efficiency of the copper powder. In addition, the outer side of the crushed copper powder will be contaminated with oxides, which will affect the recovery efficiency of the electrostatic sorting. The recycled copper powder is easily oxidized in the air and needs to be inhibited from oxidation. For this reason, we propose a multi-stage crushing mechanism for the recycling of copper powder from waste circuit boards. Summary of the invention

[0004] In order to make up for the deficiencies of the prior art and solve at least one technical problem raised in the background technology, the present invention proposes a multi-stage crushing mechanism for recycling copper powder of waste circuit boards.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a multi-stage crushing mechanism for recycling copper powder of waste circuit boards, including a workbench, a first conveyor belt is installed on the upper end of the workbench, a first crushing mechanism is installed at the upper end of the workbench near the rear end, a second crushing mechanism is installed at the upper end of the workbench near the middle, a collecting mechanism is installed at the upper end of the workbench near the front end, an electromagnetic shaft is rotatably connected to the inner side of the workbench, a scraper is fixedly connected in front of the electromagnetic shaft inside the workbench, a cylinder is installed on one side of the workbench, a second conveyor belt is installed at the front end of the workbench, and a third conveyor belt is installed below the second conveyor belt at the front end of the workbench.

[0006] Preferably, the first crushing mechanism includes a mounting block fixedly connected to the cylinder output shaft, the upper end of the mounting block is rotatably connected to a feed pipe via a rotating shaft, two groups of symmetrical slides are fixedly connected to the outer side of the feed pipe, the lower end of the slide is slidably connected to a convex strip, and both ends of the convex strip are fixedly connected to the workbench.

[0007] Preferably, the inner side of the feed pipe is fixedly connected to a limit plate, the outer side of the limit plate is provided with a limit slot, the rear end of the limit plate is fixedly connected to an external tooth plate, the outer side of the external tooth plate is meshingly connected to a first gear, the front and rear ends of the first gear are rotatably connected to a mounting plate via a rotating shaft, a first motor is installed at the rear end of the mounting plate, the output shaft of the first motor is fixedly connected to the first gear, the inner side of the mounting plate is rotatably connected to a roller, and the roller is rotatably connected to the inner side of the limit slot.

[0008] Preferably, the lower end of the mounting plate is fixedly connected to a fixing plate, a second motor is installed at the rear end of the fixing plate, an acid liquid box is fixedly connected to the front end of the fixing plate, an output shaft of the second motor passes through the acid liquid box, a first stirring rod is fixedly connected to the inside of the acid liquid box outside the output shaft of the second motor, and a spray head is provided at the lower end of the first stirring rod.

[0009] Preferably, the front end of the output shaft of the second motor is fixedly connected to the second gear, the outer side of the second gear is rotatably connected to a synchronous belt, the inner side of the synchronous belt is rotatably connected to a third gear, the rear end of the third gear is fixedly connected to the first rotating shaft, the front end of the first rotating shaft is rotatably connected to a fixed plate, and the outer side of the first rotating shaft is fixedly connected to two groups of symmetrical chipping saw blades.

[0010] Preferably, the front end of the feed pipe is fixedly connected with two sets of symmetrical first connecting rods, and the front end of the first connecting rod is rotatably connected with an arc-shaped friction plate via a rotating shaft.

[0011] Preferably, the collecting mechanism includes a second connecting rod fixedly connected to the feed pipe, the upper end of the second connecting rod is fixedly connected to an antioxidant box, the inner side of the antioxidant box is rotatably connected to a second stirring rod, the upper end of the second stirring rod is fixedly connected to a fourth gear, the outer side of the fourth gear is meshingly connected to a rack, the lower end of the rack is fixedly connected to two groups of symmetrical support plates, the lower end of the support plate is fixedly connected to the workbench, and the lower end of the antioxidant box is fixedly connected to a cleaning rod.

[0012] Preferably, a baffle is fixedly connected to the inner side of the antioxidant box, a feed hole is provided on the outer side of the baffle, a discharge pipe is slidably connected to the lower end of the baffle, the outer side of the discharge pipe passes through the antioxidant box, both ends of the discharge pipe are respectively fixedly connected to two groups of support plates, a plurality of groups of discharge holes are provided on the inner side of the discharge pipe, two groups of symmetrical slide grooves are provided on the outer side of the discharge pipe, a slider is slidably connected to the inner side of the slide groove, and the upper ends of the two groups of sliders are fixedly connected to the baffle.

[0013] Preferably, the second crushing mechanism includes a second rotating shaft rotatably connected to the workbench, a pressing roller is fixedly connected to the outer side of the second rotating shaft, one end of the second rotating shaft is fixedly connected to a sliding rod, the outer side of the sliding rod is rotatably connected to a first sleeve, one end of the first sleeve is designed with a wavy round edge, the rear end of the first sleeve is fixedly connected to the second sleeve, and the front end of the second sleeve is fixedly connected to the workbench.

[0014] Preferably, a spring is provided inside the second sleeve outside the second rotating shaft, one end of the spring is fixedly connected to the workbench, and the other end of the spring is rotatably connected to the second sleeve.

[0015] Compared with the prior art, the present invention provides a multi-stage crushing mechanism for recycling copper powder from waste circuit boards, which has the following beneficial effects:

[0016] 1. Through the cooperation between the first gear and the outer tooth plate, the chip saw blade moves back and forth along the limit plate, so that the chip saw blade can fully crush the debris, separate more copper particles from non-metallic debris, and improve the subsequent recovery efficiency. Through the cooperation between the spray head and the acid box, the chip saw blade can spray the acid solution downward when crushing, so that the oxides on the surface of the copper particles can be cleaned. The back and forth movement of the fixed plate can form a stirring effect on the debris, improve the contact efficiency between the bottom copper particles and the acid solution, avoid the bottom copper particles being buried by the debris above, and stir the sprayed copper particles so that the copper particles use friction to increase the shedding speed of the oxides.

[0017] 2. Through the cooperation between the slide plate and the convex strip, the feed pipe can produce a vibration effect when pushed by the cylinder, thereby increasing the feeding speed of the feed pipe and avoiding blockage when the feed pipe is feeding. Through the cooperation between the arc-shaped friction plate and the first connecting rod, the outer side of the pressing roller can be cleaned to avoid the copper powder and debris after extrusion from adhering to the surface of the pressing roller. Through the cooperation between the baffle plate and the discharge pipe, the antioxidant box can output antioxidant to the copper particles below when moving to avoid subsequent oxidation of the copper powder. Through the cooperation between the fourth gear and the rack, the antioxidant box can stir the antioxidant inside when moving.

[0018] 3. Through the cooperation between the second connecting rod and the cleaning rod, the feeding pipe can drive the cleaning rod to collect the copper powder on the upper end of the scraper when it moves to discharge the material. Through the cooperation between the sliding rod and the first sleeve, the drop formed by the annular wave design of the first sleeve can be used when the pressing roller rotates, so that the sliding rod pushes the second rotating shaft to one side when it rotates, so that the pressing roller can horizontally crush the debris when it rotates, thereby preventing the copper particles in the debris from being fully squeezed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a schematic diagram of the overall structure of the multi-stage crushing mechanism for recycling copper powder from waste circuit boards proposed by the present invention;

[0020] Figure 2 This is a schematic cross-sectional view of the overall structure of the multi-stage crushing mechanism for recycling copper powder from waste circuit boards proposed by the present invention;

[0021] Figure 3 It is a cross-sectional schematic diagram of the overall structure of the first crushing mechanism of the multi-stage crushing mechanism for recycling copper powder of waste circuit boards proposed by the present invention;

[0022] Figure 4 This is a partial structural diagram of the first crushing mechanism of the multi-stage crushing mechanism for recycling copper powder of waste circuit boards proposed by the present invention;

[0023] Figure 5 It is a schematic cross-sectional view of the partial structure of the first crushing mechanism of the multi-stage crushing mechanism for recycling copper powder of waste circuit boards proposed by the present invention;

[0024] Figure 6 It is a cross-sectional schematic diagram of the overall structure of the multi-stage crushing mechanism and collecting mechanism for recycling copper powder of waste circuit boards proposed by the present invention;

[0025] Figure 7 The multi-stage crushing mechanism for recycling copper powder of waste circuit boards proposed by the present invention Figure 6 A schematic diagram of the structure enlargement of part A;

[0026] Figure 8 It is a cross-sectional schematic diagram of the partial structure of the multi-stage crushing mechanism and collecting mechanism for recycling copper powder of waste circuit boards proposed by the present invention;

[0027] Fig. 9 This is a schematic diagram of the overall structure of the second crushing mechanism of the multi-stage crushing mechanism for recycling copper powder of waste circuit boards proposed by the present invention;

[0028] Fig.10 It is a cross-sectional schematic diagram of the overall structure of the second crushing mechanism of the multi-stage crushing mechanism for recycling copper powder of waste circuit boards proposed by the present invention;

[0029] Fig.11 It is a schematic cross-sectional view of the partial structure of the second crushing mechanism of the multi-stage crushing mechanism for recycling copper powder of waste circuit boards proposed by the present invention;

[0030] Fig.12 This is an enlarged schematic diagram of the partial structure of the second crushing mechanism of the multi-stage crushing mechanism for recycling copper powder of waste circuit boards proposed by the present invention.

[0031] In the figure: 1, workbench; 2, first conveyor belt; 3, first crushing mechanism; 31, mounting block; 32, feed pipe; 33, slide plate; 34, convex strip; 35, limit plate; 36, limit groove; 37, outer tooth plate; 38, first gear; 39, mounting plate; 310, first motor; 311, roller; 312, fixing plate; 313, second motor; 314, acid box; 315, first stirring rod; 316, spray head; 317, second gear; 318, synchronous belt; 319, third gear; 320, first rotating shaft; 321, crushing saw blade; 322, first connecting rod ;323, arc-shaped friction plate; 4, collecting mechanism; 41, second connecting rod; 42, antioxidant box; 43, second stirring rod; 44, fourth gear; 45, rack; 46, support plate; 47, discharge pipe; 48, discharge hole; 49, baffle; 410, feed hole; 411, slider; 412, slide; 413, cleaning rod; 5, second crushing mechanism; 51, second rotating shaft; 52, pressure roller; 53, slide rod; 54, first sleeve; 55, second sleeve; 56, spring; 6, electromagnetic shaft; 7, scraper; 8, second conveyor belt; 9, third conveyor belt; 10, cylinder. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0033] See also Figure 1-Figure 12 A multi-stage crushing mechanism for recycling copper powder of waste circuit boards includes a workbench 1, a first conveyor belt 2 is installed on the upper end of the workbench 1, a first crushing mechanism 3 is installed near the rear end of the upper end of the workbench 1, a second crushing mechanism 5 is installed near the middle of the upper end of the workbench 1, a collecting mechanism 4 is installed near the front end of the upper end of the workbench 1, an electromagnetic shaft 6 is rotatably connected to the inner side of the workbench 1, a scraper 7 is fixedly connected in front of the electromagnetic shaft 6 on the inner side of the workbench 1, a cylinder 10 is installed on one side of the workbench 1, a second conveyor belt 8 is installed at the front end of the workbench 1, and a third conveyor belt 9 is installed below the second conveyor belt 8 at the front end of the workbench 1.

[0034] In this embodiment, the first crushing mechanism 3 includes a mounting block 31 fixedly connected to the output shaft of the cylinder 10, the upper end of the mounting block 31 is rotatably connected to a feed pipe 32 via a rotating shaft, two groups of symmetrical slide plates 33 are fixedly connected to the outer side of the feed pipe 32, the lower end of the slide plate 33 is slidably connected to a convex strip 34, and both ends of the convex strip 34 are fixedly connected to the workbench 1.

[0035] Specifically, the mounting block 31 is used to install the feed pipe 32. The cylinder 10 is started, and the output shaft of the cylinder 10 drives the mounting block 31 to move back and forth. When the feed pipe 32 moves following the mounting block 31, the feed pipe 32 moves on the upper end of the convex strip 34 through the slide plate 33. The slide plate 33 causes the feed pipe 32 to vibrate when moving due to the drop of the convex strip 34, thereby shaking out the copper powder in the debris in the feed pipe 32.

[0036] In this embodiment, the inner side of the feed pipe 32 is fixedly connected to a limiting plate 35, and a limiting groove 36 is provided on the outer side of the limiting plate 35. The rear end of the limiting plate 35 is fixedly connected to an external tooth plate 37, and the outer side of the external tooth plate 37 is meshingly connected to a first gear 38. The front and rear ends of the first gear 38 are rotatably connected to a mounting plate 39 through a rotating shaft. A first motor 310 is installed at the rear end of the mounting plate 39, and the output shaft of the first motor 310 is fixedly connected to the first gear 38. The inner side of the mounting plate 39 is rotatably connected to a roller 311, and the roller 311 is rotatably connected to the inner side of the limiting groove 36.

[0037] Specifically, the first motor 310 is started, and the output shaft of the first motor 310 drives the first gear 38 to rotate, and the first gear 38 engages with the teeth of the outer tooth plate 37, so that the first gear 38 drives the mounting plate 39 to move along the outer side of the outer tooth plate 37. When the mounting plate 39 moves, the roller 311 slides on the inner side of the limit groove 36 to reduce friction and assist the movement of the limit plate 35.

[0038] In this embodiment, the lower end of the mounting plate 39 is fixedly connected to a fixing plate 312, a second motor 313 is installed at the rear end of the fixing plate 312, an acid liquid box 314 is fixedly connected to the front end of the fixing plate 312, an output shaft of the second motor 313 passes through the acid liquid box 314, a first stirring rod 315 is fixedly connected to the inside of the acid liquid box 314 outside the output shaft of the second motor 313, and a spray head 316 is provided at the lower end of the first stirring rod 315.

[0039] Specifically, the second motor 313 installed at the front end of the fixing plate 312 is started, and the output shaft of the second motor 313 drives the first stirring rod 315 to stir the acid solution in the acid solution box 314 to avoid solution deposition.

[0040] In this embodiment, the front end of the output shaft of the second motor 313 is fixedly connected to the second gear 317, the outer side of the second gear 317 is rotatably connected to the synchronous belt 318, the inner side of the synchronous belt 318 is rotatably connected to the third gear 319, the rear end of the third gear 319 is fixedly connected to the first rotating shaft 320, the front end of the first rotating shaft 320 is rotatably connected to the fixed plate 312, and the outer side of the first rotating shaft 320 is fixedly connected to two groups of symmetrical chipping saw blades 321.

[0041] Specifically, the second motor 313 drives the second gear 317 to rotate, the second gear 317 drives the third gear 319 to rotate through the synchronous belt 318, the third gear 319 drives the first rotating shaft 320 to rotate, and the first rotating shaft 320 drives the crushing saw blade 321 to rotate, thereby crushing the debris in the first crushing mechanism 3 again.

[0042] In this embodiment, the front end of the feed pipe 32 is fixedly connected to two sets of symmetrical first connecting rods 322, and the front end of the first connecting rod 322 is rotatably connected to an arc-shaped friction plate 323 via a rotating shaft.

[0043] Specifically, when the feed tube 32 moves, the arc friction plate 323 is driven to move through the first connecting rod 322 . When the arc friction plate 323 moves, the outer side of the pressing roller 52 is cleaned to prevent the extruded copper powder and debris from adhering to the surface of the pressing roller 52 .

[0044] In this embodiment, the collecting mechanism 4 includes a second connecting rod 41 fixedly connected to the feed pipe 32, the upper end of the second connecting rod 41 is fixedly connected to an antioxidant box 42, the inner side of the antioxidant box 42 is rotatably connected to a second stirring rod 43, the upper end of the second stirring rod 43 is fixedly connected to a fourth gear 44, the outer side of the fourth gear 44 is meshingly connected to a rack 45, the lower end of the rack 45 is fixedly connected to two groups of symmetrical support plates 46, the lower end of the support plate 46 is fixedly connected to the workbench 1, and the lower end of the antioxidant box 42 is fixedly connected to a cleaning rod 413.

[0045] Specifically, the feed pipe 32 drives the second connecting rod 41 to move, the second connecting rod 41 drives the antioxidant box 42 to move, the antioxidant box 42 drives the second stirring rod 43 to move, the second stirring rod 43 drives the fourth gear 44 to move, the fourth gear 44 is engaged with the teeth of the rack 45, so that the fourth gear 44 rotates during the movement, the fourth gear 44 drives the second stirring rod 43 to rotate, and the second stirring rod 43 stirs the antioxidant in the antioxidant box 42.

[0046] In this embodiment, a baffle plate 49 is fixedly connected to the inner side of the antioxidant box 42, a feed hole 410 is provided on the outer side of the baffle plate 49, a discharge pipe 47 is slidably connected to the lower end of the baffle plate 49, the outer side of the discharge pipe 47 passes through the antioxidant box 42, the two ends of the discharge pipe 47 are respectively fixedly connected to the two groups of support plates 46, a plurality of groups of discharge holes 48 are provided on the inner side of the discharge pipe 47, two groups of symmetrical slide grooves 412 are provided on the outer side of the discharge pipe 47, a slider 411 is slidably connected to the inner side of the slide groove 412, and the upper ends of the two groups of sliders 411 are fixedly connected to the baffle plate 49.

[0047] Specifically, the antioxidant box 42 drives the baffle 49 to move, and the baffle 49 slides on the inner side of the slide groove 412 through the slider 411 to avoid the baffle 49 and the discharge pipe 47 from being misaligned. When the baffle 49 moves, the feed hole 410 is aligned with the discharge hole 48 on the outer side of the discharge pipe 47, so that the antioxidant in the antioxidant box 42 flows downward and mixes with the copper particles. The second connecting rod 41 drives the cleaning rod 413 to move back and forth at the upper end of the scraper 7, thereby scraping off the copper particles at the upper end of the scraper 7.

[0048] In this embodiment, the second crushing mechanism 5 includes a second rotating shaft 51 rotatably connected to the workbench 1, a pressing roller 52 is fixedly connected to the outer side of the second rotating shaft 51, a sliding rod 53 is fixedly connected to one end of the second rotating shaft 51, a first sleeve 54 is rotatably connected to the outer side of the sliding rod 53, one end of the first sleeve 54 is designed with a wavy round edge, a rear end of the first sleeve 54 is fixedly connected to the second sleeve 55, and the front end of the second sleeve 55 is fixedly connected to the workbench 1.

[0049] Specifically, the second rotating shaft 51 drives the pressing roller 52 to rotate. When the pressing roller 52 rotates, the debris and copper particles transmitted by the first conveyor belt 2 are crushed. The copper particles are flattened by crushing and non-metallic adhesion is reduced. When the second rotating shaft 51 rotates, it drives the slide bar 53 to rotate at one end of the second sleeve 55. The drop formed by the annular wave design of the first sleeve 54 is used to push the second rotating shaft 51 to one side when the sliding bar 53 rotates, so that the pressing roller 52 crushes the debris laterally when it rotates, thereby preventing the copper particles in the debris from being fully squeezed.

[0050] In this embodiment, a spring 56 is disposed inside the second sleeve 55 outside the second rotating shaft 51 , one end of the spring 56 is fixedly connected to the workbench 1 , and the other end of the spring 56 is rotatably connected to the second sleeve 55 .

[0051] Specifically, the slide bar 53 contacts the protrusion of the first sleeve 54, causing the slide bar 53 to move to one side and compress the spring 56. When the slide bar 53 contacts the groove of the first sleeve 54, the tension of the spring 56 assists the rotation of the slide bar 53, and the second sleeve 55 prevents the slide bar 53 from being misaligned with the first sleeve 54 when rotating.

[0052] Working principle: when in use, the crushed circuit board debris is transported to the first crushing mechanism 3 through the pipeline, the first motor 310 is started, the output shaft of the first motor 310 drives the first gear 38 to rotate, the first gear 38 meshes with the teeth of the outer tooth plate 37, so that the first gear 38 drives the mounting plate 39 to move along the outer side of the outer tooth plate 37, when the mounting plate 39 moves, the roller 311 slides on the inner side of the limit groove 36 to reduce friction and assist the movement of the limit plate 35, the second motor 313 installed at the front end of the fixed plate 312 is started, the output shaft of the second motor 313 drives the first stirring rod 315 to stir the acid solution in the acid box 314 to avoid solution deposition, and then the second motor 3 13 drives the second gear 317 to rotate, the second gear 317 drives the third gear 319 to rotate through the synchronous belt 318, the third gear 319 drives the first rotating shaft 320 to rotate, the first rotating shaft 320 drives the chipping saw blade 321 to rotate, so as to crush the debris in the first crushing mechanism 3 again, so that the copper powder is separated from the non-metallic debris, and the copper powder below is moved, and the spray head 316 is started to spray the acid solution in the acid box 314 on the outside of the copper powder. When the chipping saw blade 321 is crushed during rotation, the acid solution and the debris can also be mixed, so that the solution removes the surface oxides of the copper particles, and the electrostatic separation efficiency is improved. After completion, the debris is unloaded at the upper end of the first conveyor belt 2;

[0053] The cylinder 10 is started, and the output shaft of the cylinder 10 drives the mounting block 31 to move back and forth. When the feed pipe 32 moves following the mounting block 31, the feed pipe 32 moves on the upper end of the convex strip 34 through the slide plate 33. The slide plate 33 causes the feed pipe 32 to vibrate when it moves due to the height difference of the convex strip 34, so that the copper powder in the debris in the feed pipe 32 is shaken out and mixed with the solution comprehensively, and the blockage of the feed pipe 32 is avoided. When the feed pipe 32 moves, the arc friction plate 323 is driven to move by the first connecting rod 322. When the arc friction plate 323 moves, the outer side of the pressing roller 52 is cleaned to avoid the extruded copper powder and debris from adhering to the surface of the pressing roller 52. When the feed pipe 32 moves back and forth, the debris falls on the upper end of the first conveyor belt 2 in a wave shape, thereby avoiding the copper powder being buried by other debris due to uneven feeding.

[0054] The electromagnetic shaft 6 is started to rotate by the motor, and the electromagnetic shaft 6 drives the second rotating shaft 51 to rotate through the gears and chains, and the second rotating shaft 51 drives the pressing roller 52 to rotate. When the pressing roller 52 rotates, the debris and copper particles transmitted by the first conveyor belt 2 are crushed, and the copper particles are flattened by crushing to reduce non-metallic adhesion. When the second rotating shaft 51 rotates, it drives the sliding rod 53 to rotate at one end of the second sleeve 55. The drop formed by the annular wave design of the first sleeve 54 is used to make the sliding rod 53 push the second rotating shaft 51 to one side when it rotates, so that the pressing roller 52 rolls the debris laterally when it rotates, thereby preventing the copper particles in the debris from being fully squeezed. The sliding rod 53 contacts the protrusion of the first sleeve 54, so that the sliding rod 53 moves to one side and compresses the spring 56. When the sliding rod 53 contacts the groove of the first sleeve 54, the tension of the spring 56 assists the rotation of the sliding rod 53, and the second sleeve 55 prevents the sliding rod 53 from being misaligned with the first sleeve 54 when it rotates.

[0055] The first conveyor belt 2 conveys the crushed debris to the electromagnetic shaft 6. After the electromagnetic shaft 6 is started, it separates from the debris by adsorbing copper particles through electric charge in the high-voltage electric field. The impurities on the outside of the copper particles are cleaned with an acidic solution and adsorbed by the electrode due to good conductivity. The non-metallic particles continue to be transported by the first conveyor belt 2 to the second conveyor belt 8 for centralized processing. The copper particles adsorbed on the outside of the electromagnetic shaft 6 follow the rotation of the electromagnetic shaft 6, and then contact the scraper 7 and are concentrated between the scraper 7 and the electromagnetic shaft 6. The feed pipe 32 drives the second connecting rod 41 to move, the second connecting rod 41 drives the antioxidant box 42 to move, the antioxidant box 42 drives the second stirring rod 43 to move, the second stirring rod 43 drives the fourth gear 44 to move, and the fourth gear 44 and the The teeth of the rack 45 are meshed, so that the fourth gear 44 rotates during the movement, and the fourth gear 44 drives the second stirring rod 43 to rotate. The second stirring rod 43 stirs the antioxidant in the antioxidant box 42, and the antioxidant box 42 drives the baffle 49 to move. The baffle 49 slides on the inner side of the slide groove 412 through the slider 411 to avoid the baffle 49 and the discharge pipe 47 from being misaligned. When the baffle 49 moves, the feed hole 410 is aligned with the discharge hole 48 on the outside of the discharge pipe 47, so that the antioxidant in the antioxidant box 42 flows downward and mixes with the copper particles. The second connecting rod 41 drives the cleaning rod 413 to move back and forth at the upper end of the scraper 7, thereby scraping off the copper particles on the upper end of the scraper 7, and then falling to the third conveyor belt 9.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage crushing mechanism for recycling copper powder from waste circuit boards, comprising a workbench (1), characterized in that: A first conveyor belt (2) is installed at the upper end of the workbench (1), a first crushing mechanism (3) is installed at a position near the rear end of the upper end of the workbench (1), a second crushing mechanism (5) is installed at a position near the middle of the upper end of the workbench (1), a collecting mechanism (4) is installed at a position near the front end of the upper end of the workbench (1), an electromagnetic shaft (6) is rotatably connected to the inner side of the workbench (1), a scraper (7) is fixedly connected in front of the electromagnetic shaft (6) on the inner side of the workbench (1), a cylinder (10) is installed on one side of the workbench (1), a second conveyor belt (8) is installed at the front end of the workbench (1), and a third conveyor belt (9) is installed below the second conveyor belt (8) at the front end of the workbench (1).

2. The multi-stage crushing mechanism for recycling copper powder from waste circuit boards according to claim 1 is characterized in that: The first crushing mechanism (3) comprises a mounting block (31) fixedly connected to the output shaft of the cylinder (10); the upper end of the mounting block (31) is rotatably connected to a feed pipe (32) via a rotating shaft; the outer side of the feed pipe (32) is fixedly connected to two groups of symmetrical slide plates (33); the lower end of the slide plate (33) is slidably connected to a convex strip (34); and both ends of the convex strip (34) are fixedly connected to the workbench (1).

3. The multi-stage crushing mechanism for recycling copper powder from waste circuit boards according to claim 2 is characterized in that: The inner side of the feeding pipe (32) is fixedly connected to a limiting plate (35), the outer side of the limiting plate (35) is provided with a limiting groove (36), the rear end of the limiting plate (35) is fixedly connected to an external tooth plate (37), the outer side of the external tooth plate (37) is meshingly connected to a first gear (38), the front and rear ends of the first gear (38) are rotatably connected to a mounting plate (39) via a rotating shaft, the rear end of the mounting plate (39) is mounted with a first motor (310), the output shaft of the first motor (310) is fixedly connected to the first gear (38), the inner side of the mounting plate (39) is rotatably connected to a roller (311), and the roller (311) is rotatably connected to the inner side of the limiting groove (36).

4. The multi-stage crushing mechanism for recycling copper powder from waste circuit boards according to claim 3 is characterized in that: The lower end of the mounting plate (39) is fixedly connected to a fixing plate (312), a rear end of the fixing plate (312) is installed with a second motor (313), a front end of the fixing plate (312) is fixedly connected to an acid liquid box (314), an output shaft of the second motor (313) passes through the acid liquid box (314), a first stirring rod (315) is fixedly connected to the inside of the acid liquid box (314) outside the output shaft of the second motor (313), and a spray head (316) is arranged at the lower end of the first stirring rod (315).

5. The multi-stage crushing mechanism for recycling copper powder from waste circuit boards according to claim 4 is characterized in that: The front end of the output shaft of the second motor (313) is fixedly connected to a second gear (317); the outer side of the second gear (317) is rotatably connected to a synchronous belt (318); the inner side of the synchronous belt (318) is rotatably connected to a third gear (319); the rear end of the third gear (319) is fixedly connected to a first rotating shaft (320); the front end of the first rotating shaft (320) is rotatably connected to a fixed plate (312); and the outer side of the first rotating shaft (320) is fixedly connected to two groups of symmetrical chipping saw blades (321).

6. The multi-stage crushing mechanism for recycling copper powder from waste circuit boards according to claim 2 is characterized in that: The front end of the feed pipe (32) is fixedly connected to two sets of symmetrical first connecting rods (322), and the front end of the first connecting rod (322) is rotatably connected to an arc-shaped friction plate (323) via a rotating shaft.

7. The multi-stage crushing mechanism for recycling copper powder from waste circuit boards according to claim 1 is characterized in that: The collecting mechanism (4) comprises a second connecting rod (41) fixedly connected to the feeding pipe (32); the upper end of the second connecting rod (41) is fixedly connected to an antioxidant box (42); the inner side of the antioxidant box (42) is rotatably connected to a second stirring rod (43); the upper end of the second stirring rod (43) is fixedly connected to a fourth gear (44); the outer side of the fourth gear (44) is meshingly connected to a rack (45); the lower end of the rack (45) is fixedly connected to two groups of symmetrical support plates (46); the lower end of the support plate (46) is fixedly connected to the workbench (1); and the lower end of the antioxidant box (42) is fixedly connected to a cleaning rod (413).

8. The multi-stage crushing mechanism for recycling copper powder from waste circuit boards according to claim 7 is characterized in that: A baffle (49) is fixedly connected to the inner side of the antioxidant box (42), a feed hole (410) is provided on the outer side of the baffle (49), a discharge pipe (47) is slidably connected to the lower end of the baffle (49), the outer side of the discharge pipe (47) passes through the antioxidant box (42), the two ends of the discharge pipe (47) are respectively fixedly connected to two groups of support plates (46), a plurality of discharge holes (48) are provided on the inner side of the discharge pipe (47), two groups of symmetrical slide grooves (412) are provided on the outer side of the discharge pipe (47), a slider (411) is slidably connected to the inner side of the slider (412), and the upper ends of the two groups of sliders (411) are fixedly connected to the baffle (49).

9. The multi-stage crushing mechanism for recycling copper powder from waste circuit boards according to claim 1, characterized in that: The second crushing mechanism (5) comprises a second rotating shaft (51) rotatably connected to the workbench (1); a pressing roller (52) is fixedly connected to the outer side of the second rotating shaft (51); one end of the second rotating shaft (51) is fixedly connected to a sliding rod (53); the outer side of the sliding rod (53) is rotatably connected to a first sleeve (54); one end of the first sleeve (54) is designed with a wavy round edge; the rear end of the first sleeve (54) is fixedly connected to a second sleeve (55); and the front end of the second sleeve (55) is fixedly connected to the workbench (1).

10. The multi-stage crushing mechanism for recycling copper powder from waste circuit boards according to claim 9, characterized in that: A spring (56) is arranged inside the second sleeve (55) outside the second rotating shaft (51), one end of the spring (56) is fixedly connected to the workbench (1), and the other end of the spring (56) is rotatably connected to the second sleeve (55).

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