A crushing and grinding device for recycling waste circuit boards

Abstract

The present invention provides a crushing and grinding device for recycling waste circuit boards, comprising a crushing box, a crushing rod is rotatably installed in the crushing box, and the crushing rod extends to one end in the crushing box, where a first crushing rotary disk and a second crushing rotary disk are respectively installed, and two groups of material-diverting components are symmetrically arranged on both sides of the crushing rod in the crushing box, and the material-diverting components are transmission-connected with the crushing rod, and the crushing rod drives the first crushing rotary disk and the second crushing rotary disk to move forward and reversely in the crushing box to crush the waste circuit boards, and the material-diverting components are arranged to continuously stir the waste circuit boards while crushing; a grinding box is arranged below the crushing box, and the crushed waste circuit boards are further ground by the grinding box; a magnetic suction filter box is arranged below the grinding box, and the magnetic suction filter box is used to separate powder materials of different materials, filter out iron powder and collect it, and a detachable collection tray is arranged at the bottom of the magnetic suction filter box.

Description

Technical Field

[0001] The invention relates to the technical field of waste circuit board recycling, in particular to a crushing and grinding device for recycling waste circuit boards. Background Art

[0002] In recent years, with the development and progress of society, the amount of electronic waste is growing at an alarming rate. As an important component of electronic products, printed circuit boards are present in almost all electronic devices. Therefore, the rapid growth of the number of electronic waste also indicates the rapid growth of the number of waste printed circuit boards. The metal content in printed circuit boards accounts for about 40%, of which the main valuable metals are non-ferrous metals. Moreover, the content of various elements such as copper, tin, gold, and silver in printed circuit boards is higher than the content of elements in the ores currently mined. Therefore, waste printed circuit boards have a high recycling value. At present, the most commonly used methods for recycling waste printed circuit boards are heat treatment, chemical treatment, biological treatment, mechanical treatment, or a combination of several treatment technologies. Compared with heat treatment, chemical treatment, and biological treatment technologies, mechanical treatment technology has the advantages of low cost, low investment, and low environmental pollution, so it has been more and more widely used. Mechanical treatment technology is a means of realizing metal recovery based on the differences in the physical properties of the components of waste printed circuit boards, including disassembly, crushing, sorting, and other steps. However, the electrostatic separation, eddy current separation or air flow separation widely used today are all dry separations. When processing materials with smaller particle sizes, a large amount of dust will inevitably be generated, posing a threat to human health and the surrounding environment.

[0003] Publication number "CN101455991A" provides a new process for recycling nonferrous metals in waste printed circuit boards. The process adopts shearing, crushing and shaking table sorting methods. The waste printed circuit boards are passed through a shearing machine, a cutting and grinding machine, a stirring tank, a shaking table, and a magnetic separator, and are subjected to preliminary shearing, crushing, stirring, and sorting in sequence to obtain enriched groups of nonferrous metals such as copper, lead, zinc, nickel, and tin, and enriched groups of plastics, thereby achieving comprehensive recovery of nonferrous metals in waste printed circuit boards. The shaking table sorting method can realize the resource utilization of fine particles, avoid dust pollution during the sorting process, and realize the recycling of water resources. It has the advantages of wide sorting levels and low environmental pollution, and has wide practicality.

[0004] However, the above device still has the following problems during implementation:

[0005] 1. The substrate of the circuit board is mainly composed of polyimide or polyester film, which has a low recycling value compared to valuable metals. It needs to be crushed and ground to better separate the metal and plastic materials. However, the existing crushing structure is single and cannot guarantee the adequacy of crushing, which increases the difficulty and grinding time of subsequent grinding.

[0006] 2. Grinding the circuit board into powder completely often requires the replacement of different mechanical equipment, which prolongs the construction period of the overall recycling operation and increases the production input cost; and a large amount of dust may be generated during the transportation process, which does not take advantage of the protection of the operating environment and poses certain safety hazards to the long-term work of operators. Summary of the invention

[0007] The purpose of the present invention is to provide a crushing and grinding device for recycling waste circuit boards to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A crushing and grinding device for recycling waste circuit boards comprises a crushing box, a crushing rod is rotatably installed in the crushing box, a first crushing rotary disc and a second crushing rotary disc are respectively installed at one end of the crushing rod extending into the crushing box, two groups of material shifting components are symmetrically arranged on both sides of the crushing rod in the crushing box, the material shifting components are connected to the crushing rod in a transmission manner, the crushing rod drives the first crushing rotary disc and the second crushing rotary disc to move forward and reversely in the crushing box, and the waste circuit boards are crushed, and the material shifting components are arranged to continuously stir the waste circuit boards while crushing;

[0010] A grinding box is arranged below the crushing box, and the crushed waste circuit boards are further ground by the grinding box;

[0011] A magnetic filter box is provided below the grinding box, and the magnetic filter box is used to separate powders of different materials, filter out iron powder and collect it. A detachable collection tray is provided at the bottom of the magnetic filter box.

[0012] Preferably, the top end of the breaker rod is transmission-connected with a driving motor, and one side of the breaker box is connected with an air suction pipe, and the air suction pipe is connected with an external dust collecting fan.

[0013] Preferably, the material shifting assembly includes a first shifting rod and several groups of second shifting rods connected to the bottom end of the first shifting rod, the top end of the first shifting rod is slidably connected to the top cover of the crushing box, and the first shifting rod is connected to a rack at one end outside the crushing box, and the crushing rod is fixedly connected to a gear at one end outside the crushing box, and the gear and the rack are meshing.

[0014] Preferably, a slide groove is provided on the top of the crushing box, the first lever is matched and slid in the slide groove, a track is provided on one side of the slide groove, and the rack is slidably installed in the track.

[0015] Preferably, a vibration exciter is provided on one side of the outside of the crushing box, and a vibration buffer assembly is provided on the outside of the crushing box at a position symmetrical to the vibration exciter, the vibration buffer assembly includes a first support rod and a guide shaft slidably installed in the first support rod, and a compression spring is provided on the outer surface of the guide shaft and between the first support rod and the outer wall of the crushing box.

[0016] Preferably, the crushing box is connected to the grinding box through a flexible connecting pipe, and a grinding disc and a grinding sleeve are respectively provided in the grinding box. The grinding disc is rotatably installed in the grinding sleeve through a grinding shaft, and a grinding movable bottom plate that can be opened and closed is provided at the bottom of the grinding sleeve. The grinding disc rotates in the grinding sleeve and grinds relative to the upper surface of the grinding movable bottom plate to grind the crushed waste circuit boards.

[0017] Preferably, a fixed hollow tube is provided in the grinding box, one end of the fixed hollow tube is connected to a grinding fixed bottom plate, the grinding movable bottom plate is hinged on both sides of the grinding fixed bottom plate, an opening and closing drive assembly is provided between the grinding movable bottom plate and the fixed hollow tube, and after grinding, the grinding movable bottom plate is opened to allow the powder to enter the magnetic suction filter box.

[0018] Preferably, the grinding movable base plate includes a sliding sleeve, an electric cylinder and a connecting rod, both ends of the connecting rod are pinned to the bottom of the grinding movable base plate and the outer wall of the sliding sleeve through double-ear supports, the sliding sleeve is slidably connected to the surface of the fixed hollow tube, a connecting plate is fixedly installed on the surface of the fixed hollow tube, the electric cylinder base is fixedly installed on the upper surface of the connecting plate, and the telescopic rod end of the electric cylinder is connected to the lower surface of the sliding sleeve.

[0019] Preferably, a passive gear is rotatably installed in the magnetic filter box, the bottom end of the breaking rod extends into the magnetic filter box and is fixedly connected to a driving gear, the driving gear and the passive gear are meshed, a second support rod is connected to the passive gear, and a magnetic suction cup is connected to the bottom of the second support rod.

[0020] Preferably, the bottom of the magnetic filter box is open, and an electric slide is symmetrically arranged on the inner wall of the magnetic filter box. A swing support plate is connected to the slider of the electric slide through a pin shaft, a magnetic rod is connected between the two groups of the swing support plates, and a torsion spring is arranged between the pin shaft and the swing support plate.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In the present invention, a crushing rod for crushing the waste circuit boards and a first crushing rotary disc and a second crushing rotary disc connected to the surface of the crushing rod are arranged in the crushing box. At the same time, the crushing rod is connected to a material shifting assembly through transmission, extending into the crushing box, and the waste circuit boards are continuously stirred while being crushed, so as to ensure that the first crushing rotary disc and the second crushing rotary disc are fully in contact with the waste circuit boards, thereby fully crushing them;

[0023] 2. In the present invention, a grinding box is directly arranged between the crushing box and the magnetic suction filter box, and the crushed waste circuit boards are received by the grinding movable bottom plate and the grinding sleeve, and the crushing rod is linked to the grinding shaft to drive the grinding disc to grind the waste circuit boards, without the need to replace other mechanical equipment or transport, thereby reducing the consumption of manpower and time caused by dust and transfer equipment;

[0024] 3. In the present invention, a rotating magnetic suction cup and a reciprocating magnetic suction rod are respectively arranged in the magnetic suction filter box, and the two ends of the magnetic suction rod are connected between the electric slides through torsion springs. Due to the different accumulation amounts of the contacted powder, the magnetic suction rod swings, which can not only fully contact the ground powder, but also mix the powder due to the swing, thereby increasing the contact volume between the magnetic suction rod and the powder, thereby more fully carrying out the magnetic absorption and collection of iron powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the exploded cutaway three-dimensional structure of the present invention;

[0027] Figure 3 It is a partial structural schematic diagram of the material shifting assembly of the present invention;

[0028] Figure 4 It is a schematic diagram of a partial three-dimensional structure of the grinding part of the present invention;

[0029] Figure 5 It is a schematic diagram of the three-dimensional structure of the bottom of the grinding sleeve of the present invention;

[0030] Figure 6 This is a schematic diagram of the internal structure of the magnetic filter box of the present invention;

[0031] Figure 7 For the present invention Figure 6 A schematic diagram of the enlarged structure of part A.

[0032] In the figure: 1. Crushing box; 2. Flexible connecting pipe; 3. Grinding box; 4. Magnetic suction filter box; 5. Collection tray; 6. Vibrator; 7. Rack; 8. Crushing rod; 9. Gear; 10. Track; 11. Slide; 12. Compression spring; 13. First support rod; 14. Guide shaft; 15. First crushing turntable; 16. Second crushing turntable; 17. First lever; 18. Second lever; 19. Suction pipe; 20. Active gear Wheel; 21, passive gear; 22, second support rod; 23, magnetic suction cup; 24, grinding shaft; 25, grinding disc; 26, grinding sleeve; 27, grinding movable bottom plate; 28, grinding fixed bottom plate; 29, sliding sleeve; 30, connecting plate; 31, double-ear support; 32, connecting rod; 33, electric cylinder; 34, magnetic suction rod; 35, electric slide; 36, swing support plate; 37, pin shaft; 38, torsion spring; 39, fixed hollow tube. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1-7 , the present invention provides a technical solution: Example

[0035] A crushing and grinding device for recycling waste circuit boards comprises a crushing box 1, in which a crushing rod 8 is rotatably installed, the top of the crushing rod 8 is transmission-connected to a driving motor, and the crushing rod 8 extends to one end of the crushing box 1 and is respectively installed with a first crushing turntable 15 and a second crushing turntable 16, two groups of material shifting components are symmetrically arranged on both sides of the crushing rod 8 in the crushing box 1, the material shifting components are transmission-connected to the crushing rod 8, the crushing rod 8 drives the first crushing turntable 15 and the second crushing turntable 16 to move forward and reversely in the crushing box 1, and the waste circuit boards are crushed, and the material shifting components are arranged to continuously stir the waste circuit boards while crushing.

[0036] In this embodiment, a crushing rod 8 for crushing waste circuit boards and a first crushing disc 15 and a second crushing disc 16 connected to the surface of the crushing rod 8 are arranged in the crushing box 1. An external motor is connected to the crushing rod 8 for transmission. The external motor is started to drive the crushing rod 8 to rotate, thereby driving the first crushing disc 15 and the second crushing disc 16 on the surface of the crushing rod 8 to rotate.

[0037] Considering that in the process of crushing, the waste circuit boards may not be crushed sufficiently due to the accumulation of the waste circuit boards in the crushing box 1, a material shifting assembly is provided to continuously stir the waste circuit boards while crushing them.

[0038] Specifically, the material shifting assembly includes a first shifting rod 17 and a plurality of second shifting rods 18 connected to the bottom end of the first shifting rod 17. The top end of the first shifting rod 17 is slidably connected to the top cover of the crushing box 1, and the first shifting rod 17 is located outside the crushing box 1 and is connected to a rack 7. The crushing rod 8 is located outside the crushing box 1 and is fixedly connected to a gear 9. The gear 9 is meshed with the rack 7. A chute 11 is provided on the top of the crushing box 1. The first shifting rod 17 is matched and slidable in the chute 11. A track 10 is provided on one side of the chute 11. The rack 7 is slidably installed in the track 10.

[0039] In this embodiment, a gear 9 is installed at the top of the crushing rod 8, and a first lever 17 is installed at the bottom of the rack 7 on both sides of the gear 9. The first lever 17 extends into the crushing box 1, and the bottom end of the first lever 17 is connected to the second lever 18. The first lever 17 and the second lever 18 are completely extended into the waste circuit boards. When the crushing rod 8 rotates, the rack 7 and the gear 9 are meshed at the same time, driving the first lever 17 and the second lever 18 to act in the crushing box 1, turning the waste circuit boards, ensuring that the first crushing turntable 15 and the second crushing turntable 16 are fully in contact with the waste circuit boards, so as to fully crush them.

[0040] It should be noted that if the rotation direction of the breaker rod 8 is single, the driving structure of the gear 9 to the rack 7 cannot be realized. Therefore, after the material-moving assembly is added, the rotation of the external motor is set to alternate forward and reverse drive, and the number of rotations of the gear 9 is determined by the length of the rack 7, thereby setting the forward and reverse alternating time of the external motor. This principle is known to those skilled in the art, so it will not be repeated here.

[0041] An exciter 6 is provided on one side of the outside of the crushing box 1, and a vibration buffer assembly is provided on the outside of the crushing box 1 at a position symmetrical to the exciter 6. The vibration buffer assembly includes a first support rod 13 and a guide shaft 14 slidably installed in the first support rod 13. A compression spring 12 is provided on the outer surface of the guide shaft 14 and between the first support rod 13 and the outer wall of the crushing box 1.

[0042] In this embodiment, in order to ensure smooth material delivery, the crushing box 1 is set to be a cone with a larger upper part and a smaller lower part. Therefore, in order to prevent the incompletely crushed part from blocking the material delivery port, an exciter 6 is provided on one side of the outside of the crushing box 1, and a vibration buffer assembly is provided on the outside of the crushing box 1 at a position symmetrical to the exciter 6. The exciter 6 is started to drive the crushing box 1 to reciprocate in the horizontal direction. At the same time, the guide shaft 14 is used to provide horizontal movement stability and balance for the above-mentioned reciprocating movement, and the compression spring 12 is used to provide a certain buffer force for the above-mentioned reciprocating movement to ensure the stability of the crushing box 1 when it shakes.

[0043] One side of the crushing box 1 is connected with an air suction pipe 19, and the air suction pipe 19 is connected with an external dust collecting fan.

[0044] During the crushing process, the waste circuit boards will generate a lot of dust. In order to ensure that the dust is reduced and controlled in subsequent operations, a suction pipe 19 is provided on one side of the crushing box 1. By starting the external dust collecting fan, the suction pipe 19 can be used to absorb and collect the dust. The external dust collecting fan is a suction fan, and its working principle and installation method are well known to those skilled in the art, so they are not described in detail.

[0045] A magnetic filter box 4 is provided below the grinding box 3 , and the magnetic filter box 4 is used to separate different materials of powder materials, filter out iron powder and collect it. A detachable collection tray 5 is provided at the bottom of the magnetic filter box 4 .

[0046] In this embodiment, a magnetic filter box 4 is provided below the crushing box 1 to separate different materials from the crushed waste circuit boards, filter out iron powder and collect it.

[0047] Specifically, a passive gear 21 is rotatably installed in the magnetic filter box 4, the bottom end of the breaking rod 8 extends into the magnetic filter box 4 and is fixedly connected to a driving gear 20, the driving gear 20 is meshed with the passive gear 21, a second support rod 22 is connected to the passive gear 21, and a magnetic suction cup 23 is connected to the bottom of the second support rod 22.

[0048] In this embodiment, a rotating second support rod 22 is provided in the magnetic filter box 4, a passive gear 21 is installed at one end of the second support rod 22, and a driving gear 20 is connected to the bottom end of the crushing rod 8. By utilizing the meshing of the driving gear 20 and the passive gear 21, an external motor drives the crushing rod 8 to rotate, while the driving gear 20 drives the passive gear 21 to rotate, thereby driving the magnetic suction cup 23 to rotate forward and reverse with the passive gear 21 as the center rod, magnetically suctioning the falling material to collect the iron scraps.

[0049] It should be noted that, since the magnetic suction cup 23 is configured as an electromagnet structure, the wires used to connect the magnetic suction cup 23 will not be entangled in the forward and reverse working modes.

[0050] It should be noted that the gear ratio of the passive gear 21 and the active gear 20 is set to at least 2:1 (the maximum size of the gear does not exceed the box space volume of the magnetic filter box 4). Since the external motor needs to control the crushing rod 8 to drive the crushing, grinding and magnetic suction disk 23 to rotate in sequence, controlling the gear ratio and the speed can also reduce the load of the external motor, protect the external motor, and extend the service life of the motor. Example

[0051] Based on Example 1, after the crushing box 1 has completed the sufficient crushing of the waste circuit boards, the circuit boards need to be completely ground into powder, and other mechanical equipment often needs to be replaced. Dust is easily generated during the transfer process, and it is time-consuming and labor-intensive. Therefore, a grinding box 3 is arranged between the crushing box 1 and the magnetic suction filter box 4.

[0052] A grinding box 3 is provided below the crushing box 1, and the crushed waste circuit boards are further ground by the grinding box 3;

[0053] The crushing box 1 is connected to the grinding box 3 through a flexible connecting pipe 2. It should be noted that since an exciter 6 is provided on one side of the outside of the crushing box 1, the crushing box 1 and the grinding box 3 are connected through the flexible connecting pipe 2 to prevent the fixed grinding box 3 from interfering with the shaking of the crushing box 1.

[0054] Specifically, a grinding disc 25 and a grinding sleeve 26 are respectively provided in the grinding box 3. The grinding disc 25 is rotatably installed in the grinding sleeve 26 through the grinding shaft 24. A grinding movable bottom plate 27 that can be opened and closed is provided at the bottom of the grinding sleeve 26. The grinding disc 25 rotates in the grinding sleeve 26 and grinds relative to the upper surface of the grinding movable bottom plate 27 to grind the crushed waste circuit boards.

[0055] In this embodiment, the waste circuit boards crushed by the first crushing turntable 15 and the second crushing turntable 16 in the crushing box 1 will fall into the grinding sleeve 26. In the initial state, the grinding movable bottom plate 27 and the grinding sleeve 26 are closed, and the grinding sleeve 26 and the grinding movable bottom plate 27 receive the waste circuit boards. The grinding shaft 24 is connected to the crushing rod 8, which can drive the grinding disc 25 to rotate. The crushed waste circuit boards are ground by the rotation and rolling of the grinding disc 25 and the grinding sleeve 26. There is no need to replace other mechanical equipment or transport them, which reduces the manpower and time consumption caused by dust and transfer equipment.

[0056] A fixed hollow tube 39 is provided in the grinding box 3, one end of the fixed hollow tube 39 is connected to the grinding fixed bottom plate 28, the grinding movable bottom plate 27 is hinged on both sides of the grinding fixed bottom plate 28, and an opening and closing driving component is provided between the grinding movable bottom plate 27 and the fixed hollow tube 39. After grinding, the grinding movable bottom plate 27 is opened to allow the powder to enter the magnetic suction filter box 4.

[0057] In this embodiment, the grinding shaft 24 is rotatably connected via two sets of fixed hollow tubes 39, and the grinding shaft 24 and the crushing rod 8 are fixedly connected, so that the grinding disc 25 and the first crushing disc 15 and the second crushing disc 16 can be controlled to rotate by the same external motor, thereby simplifying the mechanical structure.

[0058] The grinding movable base plate 27 includes a sliding sleeve 29, an electric cylinder 33 and a connecting rod 32. Both ends of the connecting rod 32 are pinned to the bottom of the grinding movable base plate 27 and the outer wall of the sliding sleeve 29 through double-ear supports 31. The sliding sleeve 29 is slidably connected to the surface of the fixed hollow tube 39. A connecting plate 30 is fixedly installed on the surface of the fixed hollow tube 39. The base of the electric cylinder 33 is fixedly installed on the upper surface of the connecting plate 30, and the telescopic rod end of the electric cylinder 33 is connected to the lower surface of the sliding sleeve 29.

[0059] When in use, after a certain period of grinding treatment, the electric cylinder 33 is started to pull the sliding sleeve 29 to slide on the surface of the fixed hollow tube 39, thereby pulling the connecting rod 32 through the double-ear support 31, and the connecting rod 32 and the grinding movable bottom plate 27 are also provided with pin connection, so that the two sets of grinding movable bottom plates 27 can be pulled apart, so that the bottom of the grinding sleeve 26 is opened, and the waste circuit boards after grinding treatment fall into the magnetic suction filter box 4, and automatic control is sufficient, without the need to disassemble the crushing box 1, the grinding box 3 and the magnetic suction filter box 4, to complete the crushing and grinding of the waste circuit boards and the collection of the effective iron powder, thereby improving the processing efficiency, reducing the setting of mechanical equipment, and saving costs. Example

[0060] Based on the first embodiment, since the rotation position of the magnetic suction cup 23 is biased toward the center of the cavity of the magnetic suction filter box 4, some powder may not be magnetically attracted by the magnetic suction cup 23 during the material dropping process and the iron powder cannot be completely collected. Therefore, the following structure is set:

[0061] The bottom of the magnetic filter box 4 is open, and an electric slide 35 is symmetrically arranged on the inner wall of the magnetic filter box 4. A swing support plate 36 is pinned to the slider of the electric slide 35 through a pin shaft 37. A magnetic rod 34 is connected between the two groups of swing support plates 36. A torsion spring 38 is arranged between the pin shaft 37 and the swing support plate 36.

[0062] In this embodiment, two groups of electric slides 35 are symmetrically arranged at the bottom of the magnetic filter box 4, and a group of magnetic rods 34 are arranged between the two groups of electric slides 35. The electric slides 35 are used to drive the magnetic rods 34 to move back and forth, so as to perform secondary magnetic treatment on the powder that completely falls into the collection tray 5, so as to adsorb and collect the iron in the powder as much as possible and separate the effective substances.

[0063] When in use, the electric slide 35 drives the magnetic rod 34 to move. Because a torsion spring 38 is provided, the magnetic rod 34 swings during its movement due to the different accumulation amounts of the contacted powder. It can not only fully contact the ground powder, but also mix the powder due to the swing, thereby increasing the contact volume between the magnetic rod 34 and the powder, thereby more fully magnetically absorbing and collecting the iron powder.

[0064] Working principle: During the use of the device, the waste circuit boards to be recycled are placed in the crushing box 1, and the external motor is started to drive the crushing rod 8 to rotate, so that the first crushing disc 15 and the second crushing disc 16 arranged on the surface of the crushing rod 8 rotate, thereby crushing the waste circuit boards. The rack 7 and the gear 9 are meshed, so that when the crushing rod 8 rotates, the first lever 17 and the second lever 18 can be driven to act in the crushing box 1 at the same time, and the waste circuit boards are turned over and stirred, ensuring that the first crushing disc 15 and the second crushing disc 16 are fully in contact with the waste circuit boards, so as to fully crush them;

[0065] The vibrator 6 is started to drive the crushing box 1 to reciprocate in the horizontal direction, so that the crushed waste circuit boards are smoothly sent into the grinding box 3. Since the grinding shaft 24 is connected to the crushing rod 8, the grinding disc 25 rotates at the same time, and the grinding movable bottom plate 27 and the grinding sleeve 26 that can be opened and closed are used to receive the falling materials. The crushed waste circuit boards are ground by the rotation and rolling of the grinding disc 25 and the grinding sleeve 26, without the need to replace other mechanical equipment or transport, thereby reducing the consumption of manpower and time caused by dust and transfer equipment;

[0066] After a certain period of grinding treatment, the electric cylinder 33 is started to pull the sliding sleeve 29 to slide on the surface of the fixed hollow tube 39, thereby pulling the connecting rod 32 through the double-ear support 31. The connecting rod 32 and the grinding movable bottom plate 27 are also provided with pin connection. Therefore, the two sets of grinding movable bottom plates 27 can be pulled apart, so that the bottom of the grinding sleeve 26 is opened, and the waste circuit board after grinding treatment falls into the magnetic suction filter box 4. While the external motor drives the crushing rod 8 to rotate, the active gear 20 drives the passive gear 21 to rotate, thereby driving the magnetic suction cup 23 to rotate forward and reverse with the passive gear 21 as the center rod, and magnetically absorb the falling materials to collect iron scraps;

[0067] At the bottom of the magnetic filter box 4, two groups of electric slides 35 are symmetrically arranged, and a group of magnetic rods 34 are arranged between the two groups of electric slides 35. The electric slides 35 are used to drive the magnetic rods 34 to move back and forth, so as to perform secondary magnetic treatment on the powder that completely falls into the collection tray 5, so as to adsorb and collect the iron in the powder as much as possible and separate the effective substances.

[0068] The present application does not need to separate the crushing box 1, the grinding box 3 and the magnetic suction filter box 4, and can automatically control and complete the crushing, grinding and collection of effective iron powder of the waste circuit boards, thereby improving the processing efficiency, reducing the setting of mechanical equipment and saving costs.

[0069] It should be noted that the vibrator 6, external motor and dust collection fan are all devices or equipment existing in the prior art, or are devices or equipment that can be realized in the prior art. Their power supply, specific composition and principles are clear to those skilled in the art, so they will not be described in detail.

[0070] 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 crushing and grinding device for recycling waste circuit boards, comprising a crushing box (1), a crushing rod (8) rotatably mounted in the crushing box (1), a first crushing disc (15) and a second crushing disc (16) respectively mounted on one end of the crushing rod (8) extending into the crushing box (1), characterized in that: Two sets of material shifting assemblies are symmetrically arranged on both sides of the crushing rod (8) in the crushing box (1), and the material shifting assemblies are connected to the crushing rod (8) by transmission. The crushing rod (8) drives the first crushing rotating disk (15) and the second crushing rotating disk (16) to move forward and reversely in the crushing box (1) to crush the waste circuit boards. The material shifting assemblies are arranged to continuously stir the waste circuit boards while crushing them. A grinding box (3) is arranged below the crushing box (1) and is connected to the grinding box (3), and the crushed waste circuit boards are further ground by the grinding box (3); A magnetic filter box (4) is provided below the grinding box (3), and the magnetic filter box (4) is used to separate different materials of powder materials, filter out iron powder and collect it, and a detachable collection tray (5) is provided at the bottom of the magnetic filter box (4); The material shifting assembly comprises a first shifting rod (17) and a plurality of groups of second shifting rods (18) connected to the bottom end of the first shifting rod (17); the top end of the first shifting rod (17) is slidably connected to the top cover of the crushing box (1); one end of the first shifting rod (17) located outside the crushing box (1) is connected to a rack (7); one end of the crushing rod (8) located outside the crushing box (1) is fixedly connected to a gear (9); the gear (9) and the rack (7) are meshed; The crushing box (1) has a slide groove (11) on the top, the first lever (17) is matched and slidable in the slide groove (11), a track (10) is provided on one side of the slide groove (11), and the rack (7) is slidably installed in the track (10); A passive gear (21) is rotatably mounted in the magnetic filter box (4); the bottom end of the crushing rod (8) extends into the magnetic filter box (4) and is fixedly connected to a driving gear (20); the driving gear (20) and the passive gear (21) are meshed; a second support rod (22) is connected to the passive gear (21); and a magnetic suction cup (23) is connected to the bottom of the second support rod (22); The bottom of the magnetic filter box (4) is open, and an electric slide (35) is symmetrically arranged on the inner wall of the magnetic filter box (4). A swing support plate (36) is pinned to the slider of the electric slide (35) via a pin shaft (37). A magnetic rod (34) is connected between two groups of the swing support plates (36). A torsion spring (38) is arranged between the pin shaft (37) and the swing support plate (36).

2. A crushing and grinding device for recycling waste circuit boards according to claim 1, characterized in that: The top end of the crushing rod (8) is drivingly connected to a driving motor, and one side of the crushing box (1) is connected to an air suction pipe (19), and the air suction pipe (19) is connected to an external dust collection fan.

3. A crushing and grinding device for recycling waste circuit boards according to claim 1, characterized in that: An exciter (6) is provided on one side of the outside of the crushing box (1), and a vibration buffer assembly is provided on the outside of the crushing box (1) at a position symmetrical to the exciter (6), the vibration buffer assembly comprising a first support rod (13) and a guide shaft (14) slidably mounted in the first support rod (13), and a compression spring (12) is provided on the outer surface of the guide shaft (14) and between the first support rod (13) and the outer wall of the crushing box (1).

4. The crushing and grinding device for recycling waste circuit boards according to claim 1 is characterized in that: The crushing box (1) is connected to the grinding box (3) via a flexible connecting pipe (2). A grinding disc (25) and a grinding sleeve (26) are respectively arranged in the grinding box (3). The grinding disc (25) is rotatably installed in the grinding sleeve (26) via a grinding shaft (24). A grinding movable bottom plate (27) that can be opened and closed is arranged at the bottom of the grinding sleeve (26). The grinding disc (25) rotates in the grinding sleeve (26) and grinds against the upper surface of the grinding movable bottom plate (27), thereby grinding the crushed waste circuit boards.

5. A crushing and grinding device for recycling waste circuit boards according to claim 4, characterized in that: A fixed hollow tube (39) is provided in the grinding box (3), one end of the fixed hollow tube (39) is connected to a grinding fixed bottom plate (28), the grinding movable bottom plate (27) is hinged to both sides of the grinding fixed bottom plate (28), an opening and closing driving assembly is provided between the grinding movable bottom plate (27) and the fixed hollow tube (39), and after grinding, the grinding movable bottom plate (27) is opened to allow powder to enter the magnetic suction filter box (4).

6. A crushing and grinding device for recycling waste circuit boards according to claim 5, characterized in that: The grinding movable base plate (27) comprises a sliding sleeve (29), an electric cylinder (33) and a connecting rod (32); both ends of the connecting rod (32) are pin-connected to the bottom of the grinding movable base plate (27) and the outer wall of the sliding sleeve (29) through double-ear supports (31); the sliding sleeve (29) is slidably connected to the surface of a fixed hollow tube (39); a connecting plate (30) is fixedly mounted on the surface of the fixed hollow tube (39); the base of the electric cylinder (33) is fixedly mounted on the upper surface of the connecting plate (30); and the telescopic rod end of the electric cylinder (33) is connected to the lower surface of the sliding sleeve (29).

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