Classification screening equipment for circuit board recycling

Abstract

The utility model discloses grading screening equipment for circuit board recycling, which comprises a screening shell, supporting legs are welded at the four corners of the bottom of the screening shell, circular through grooves are formed in the outer walls of the two sides of the screening shell in a penetrating manner, rotating shafts are rotatably inserted into the inner walls of the circular through grooves, and a screening frame is welded between the two rotating shafts; a first mesh plate and a second mesh plate are welded to the outer walls of the bottoms of the two screening frames correspondingly, a limiting clamping plate is welded to the outer wall of a rotating shaft, compression springs are arranged on the two sides of the limiting clamping plate correspondingly, and a compression spring is welded to the outer wall of one side of the limiting clamping plate. In the process of screening solid particles, the tooth-missing ring drives the rack to stir and is matched with the elastic potential energy of the compression springs on the two sides to rebound, so that the screening frame containing the solid particles is driven to shake left and right, the shaking amplitude is greatly improved, the accumulated solid particles can be effectively dispersed, and the screening efficiency is improved. Therefore, the screening effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board recycling, in particular to a grading and screening device for circuit board recycling. Background Art

[0002] Circuit boards, also known as printed circuit boards, connect electrical circuits in electrical components and occupy a small space. They contain a variety of metals, and when they are scrapped, simply discarding them is wasteful. Therefore, recycling equipment is needed to recover the remaining valuable parts of the circuit boards. During recycling, the circuit boards need to be crushed, and the crushed solid particles need to be screened. However, existing screening equipment still has some problems when performing screening processes:

[0003] The screening effect is not ideal. When existing graded screening devices screen the solid particles of crushed circuit boards, the existing screening equipment cannot fully vibrate and screen the solid particles during the shaking screening process, resulting in the accumulation of solid particles that need to be screened. As a result, many particles that urgently need to be screened are not screened out and are directly discharged, resulting in poor overall screening effect. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a grading and screening device for recycling circuit boards.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A grading and screening device for recycling circuit boards includes a screening shell, support legs are welded to the four corners of the bottom of the screening shell, and circular through grooves are penetrated through the outer walls of both sides of the screening shell, a rotating shaft is rotatably inserted into the inner wall of the circular through groove, and a screening frame is welded between the two rotating shafts, a first mesh plate and a second mesh plate are welded to the outer walls of the bottom of the two screening frames respectively, and a limiting clamp is welded to the outer wall of the rotating shaft, compression springs are provided on both sides of the limiting clamp, a compression spring is welded to the outer wall of one side of the limiting clamp, and a rack is welded to the outer wall of the limiting clamp.

[0007] As a further solution of the present invention: the first mesh plate is located directly above the second mesh plate, and the diameter of the holes of the first mesh plate is larger than the diameter of the holes of the second mesh plate.

[0008] As a further solution of the present invention: a first mesh plate is fixed to the top of the screening frame by screws, and a rubber sleeve is bonded to the top outer wall of the first mesh plate.

[0009] As a further solution of the present invention: a second rectangular fixing frame is bonded to the top outer wall of the rubber sleeve, and support blocks are provided at the four bottom corners of the second rectangular fixing frame. The size of the second rectangular fixing frame is adapted to the inner wall size of the screening shell.

[0010] As a further solution of the present invention: the outer wall of the rack is engaged with a toothed ring, and the bottom axis of the toothed ring is connected to a servo motor.

[0011] As a further solution of the present invention: a rectangular through groove is opened on the outer wall of the screening shell, and a discharge pipe is connected to the inner wall of one side of the bottom of the screening frame along an inclined direction, and the size of the discharge pipe is adapted to the size of the inner wall of the rectangular through groove.

[0012] As a further solution of the present invention: the ratio of the effective number of teeth of the rack to the effective number of teeth of the toothless ring is 3:1.

[0013] Compared with the prior art, the present invention provides a grading and screening device for recycling circuit boards, which has the following beneficial effects:

[0014] 1. The grading screening equipment of this design sets two mesh plates of different specifications at the bottom of the screening frame, so that smaller particles can be screened out from top to bottom in sequence, and the screened particles are directly discharged from the discharge pipe on the side, which greatly improves the screening efficiency.

[0015] 2. In the process of screening solid particles, the grading screening equipment of this design drives the rack to move through the toothed ring, and cooperates with the elastic potential energy rebound of the compression springs on both sides, thereby driving the screening frame containing solid particles to swing left and right, greatly increasing the swing amplitude, which can effectively disperse the accumulated solid particles, thereby improving the screening effect.

[0016] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a grading and screening device for recycling circuit boards proposed in the utility model;

[0018] Figure 2 This is a side view of the overall structure of a grading and screening device for circuit board recycling proposed by the utility model;

[0019] Figure 3 This is a bottom view of the overall structure of a grading and screening device for circuit board recycling proposed by the utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of a grading and screening device for circuit board recycling proposed by the utility model.

[0021] In the figure: 1. screening shell; 2. supporting legs; 3. circular through-slot; 4. rotating shaft; 5. screening frame; 6. first mesh plate; 7. second mesh plate; 8. first rectangular fixed frame; 9. rubber sleeve; 10. second rectangular fixed frame; 11. supporting block; 12. limiting clamping plate; 13. compression spring; 14. rack; 15. toothed ring; 16. servo motor; 17. rectangular through-slot; 18. discharge pipe. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] Example 1:

[0024] A grading and screening device for recycling circuit boards, in this embodiment, as Figure 1-4 As shown, it includes a screening shell 1, the four corners of the bottom of the screening shell 1 are welded with support legs 2, and the outer walls of both sides of the screening shell 1 are penetrated with circular through grooves 3, the inner wall of the circular through groove 3 is rotatably plugged with a rotating shaft 4, and a screening frame 5 is welded between the two rotating shafts 4, the bottom outer walls of the two screening frames 5 are respectively welded with a first mesh plate 6 and a second mesh plate 7, and the outer wall of the rotating shaft 4 is welded with a limit card plate 12, both sides of the limit card plate 12 are provided with a compression spring 13, the outer wall of one side of the limit card plate 12 is welded with a compression spring 13, and the outer wall of the limit card plate 12 is welded with a rack 14;

[0025] By arranging two mesh plates of different specifications at the bottom of the screening frame 5, smaller particles can be screened out in sequence from top to bottom, and the screened particles are directly discharged from the discharge pipe on the side, which greatly improves the screening efficiency.

[0026] The first mesh plate 6 is located directly above the second mesh plate 7, and the diameter of the holes of the first mesh plate 6 is larger than the diameter of the holes of the second mesh plate 7. The top of the screening frame 5 is fixed with the first mesh plate 6 by screws, and the top outer wall of the first mesh plate 6 is bonded with a rubber sleeve 9;

[0027] A second rectangular fixing frame 10 is bonded to the top outer wall of the rubber sleeve 9 , and support blocks 11 are provided at the four bottom corners of the second rectangular fixing frame 10 . The size of the second rectangular fixing frame 10 is adapted to the inner wall size of the screening shell 1 .

[0028] The outer wall of the rack 14 is engaged with a toothed ring 15, and the bottom axis of the toothed ring 15 is connected to a servo motor 16;

[0029] During the screening process of solid particles, the toothed ring 15 drives the rack 14 to move, and cooperates with the elastic potential energy rebound of the compression springs 13 on both sides, thereby driving the screening frame 5 containing solid particles to swing left and right, greatly increasing the swing amplitude, and can effectively disperse the accumulated solid particles, thereby improving the screening effect.

[0030] When using this embodiment, the screening device is first assembled and connected to an external power supply for trial operation. After normal operation, the solid particles to be screened are directly poured into the screening frame 5 on the top of the screening shell 1. Since the first mesh plate 6 is located directly above the second mesh plate 7 and the hole diameter of the first mesh plate 6 is larger, the servo motor 16 on the side is started, and the servo motor 16 is used to drive the toothed ring 15 to rotate continuously. When some teeth come into contact with the rack 14, the toothed ring 14 will be driven to move, thereby driving the screening frame 5 filled with solid particles to swing left and right. The elastic potential energy of the compression spring 13 will accelerate the swinging of the screening frame 5 to the left and right, so that the solid particles can be screened quickly, and the faster the screening process, the better. Large solid particles are discharged from the discharge pipe 18 on the side, while smaller solid particles fall into the bottom screening frame 5. Since the rubber sleeve 9 provided above can gather the fallen solid particles, all the solid particles fall directly onto the second mesh plate 7. At this time, the servo motor 16 is started to drive the toothed ring 15 to rotate continuously. When some teeth come into contact with the rack 14, the toothed ring 14 will be driven to move, thereby driving the screening frame 5 containing solid particles to swing left and right. The elastic potential energy of the compression spring 13 will accelerate the swinging of the screening frame 5 left and right, so that the solid particles can be quickly screened, and the solid particles with the smallest diameter are discharged from the bottom, and the medium-sized particles are discharged from the discharge pipe 18 on the side.

[0031] Example 2:

[0032] A grading and screening device for recycling circuit boards, such as Figure 1-4 As shown, this embodiment makes the following supplements on the basis of Example 1: a rectangular through groove 17 is opened on the outer wall of the screening shell 1, and a discharge pipe 18 is connected to the inner wall of one side of the bottom of the screening frame 5 in an inclined direction. The size of the discharge pipe 18 is adapted to the size of the inner wall of the rectangular through groove 17, and the ratio of the effective number of teeth of the rack 14 to the effective number of teeth of the toothless ring 15 is 3:1.

[0033] The present invention is described in detail with reference to the examples of the exemplary embodiments. However, it will be understood by those skilled in the art that, without departing from the concept of the present invention, various modifications and variations can be made to the above-mentioned specific embodiments, and various combinations of the various technical features and structures proposed in the present invention can be made without exceeding the scope of protection of the present invention, which is determined by the appended claims. The foregoing description of the specific exemplary embodiments of the present invention is not intended to limit the present invention to the precise form disclosed, and it is obvious that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can implement and utilize the various different exemplary embodiments of the present invention and various different options and changes. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A grading and screening device for recycling circuit boards, comprising a screening housing (1), characterized in that: Support legs (2) are welded to the four corners of the bottom of the screening shell (1), and circular through grooves (3) are penetrated through the outer walls of both sides of the screening shell (1), a rotating shaft (4) is rotatably inserted into the inner wall of the circular through groove (3), and a screening frame (5) is welded between the two rotating shafts (4), the bottom outer walls of the two screening frames (5) are respectively welded with a first mesh plate (6) and a second mesh plate (7), and the outer wall of the rotating shaft (4) is welded with a limiting clamping plate (12), and compression springs (13) are provided on both sides of the limiting clamping plate (12), a compression spring (13) is welded to the outer wall of one side of the limiting clamping plate (12), and a rack (14) is welded to the outer wall of the limiting clamping plate (12).

2. A grading and screening device for recycling circuit boards according to claim 1, characterized in that: The first mesh plate (6) is located directly above the second mesh plate (7), and the diameter of the holes of the first mesh plate (6) is larger than the diameter of the holes of the second mesh plate (7).

3. The grading and screening equipment for recycling circuit boards according to claim 1, characterized in that: A first mesh plate (6) is fixed to the top of the screening frame (5) by screws, and a rubber sleeve (9) is bonded to the outer wall of the top of the first mesh plate (6).

4. A grading and screening device for recycling circuit boards according to claim 3, characterized in that: A second rectangular fixing frame (10) is bonded to the top outer wall of the rubber sleeve (9), and support blocks (11) are provided at the four bottom corners of the second rectangular fixing frame (10). The size of the second rectangular fixing frame (10) is compatible with the size of the inner wall of the screening shell (1).

5. The grading and screening equipment for recycling circuit boards according to claim 1, characterized in that: The outer wall of the rack (14) is engaged with a toothed ring (15), and the bottom axis of the toothed ring (15) is connected to a servo motor (16).

6. The grading and screening equipment for recycling circuit boards according to claim 1, characterized in that: The outer wall of the screening shell (1) is provided with a rectangular through groove (17), and the inner wall of one side of the bottom of the screening frame (5) is connected with a discharge pipe (18) along an inclined direction, and the size of the discharge pipe (18) is adapted to the size of the inner wall of the rectangular through groove (17).

7. The grading and screening equipment for recycling circuit boards according to claim 5, characterized in that: The ratio of the effective number of teeth of the rack (14) to the effective number of teeth of the toothless ring (15) is 3:1.

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