A dust collection device and PCB processing system for PCB processing

Abstract

This invention belongs to the field of manufacturing technology, and particularly relates to a dust collection device and system for PCB processing. The dust collection device includes a main pipe and several branch pipes. The outlet of the main pipe is connected to a negative pressure device and a dust removal device. A control valve is installed on the main pipe. A connecting structure is provided on the main pipe, and the branch pipes are connected to the main pipe through the connecting structure. The connecting structure is composed of several connecting segments connected sequentially, with the diameter of the connecting segments closer to the main pipe being larger. Each connecting segment connects to at least one branch pipe, and the angle between the airflow direction of the branch pipe at the connection and the airflow direction in the corresponding connecting segment is less than 90 degrees. The solution provided by this invention connects the main pipe and branch pipes through the connecting structure, reduces air pressure loss at the connection, increases the negative pressure at the inlet of the branch pipe, and improves the dust collection capacity.

Description

Technical Field

[0001] This invention belongs to the field of manufacturing technology, and in particular relates to a dust collection device and a PCB processing system for PCB processing. Background Technology

[0002] PCB (Printed Circuit Board), also known as a printed circuit board, is an important electronic component. It serves as a support for electronic components and a carrier for the electrical interconnection of these components. Because it is manufactured using electronic printing techniques, it is called a "printed" circuit board.

[0003] During PCB manufacturing, machining is required, including cutting, drilling, and trimming, all of which necessitate the use of cutting tools. These high-speed rotating tools reduce the material content of the PCB, generating a significant amount of dust. Because PCBs employ a multi-layered composite structure, the dust produced during cutting contains various harmful substances such as metals and plastics, necessitating the use of dust collection devices for centralized treatment.

[0004] To improve efficiency, several PCBs are typically processed simultaneously during PCB manufacturing. Each processing head is equipped with a dust extraction hood, and each hood is connected to a dust collection device via a separate pipe. This structure, where each hood's pipe is individually connected to the main pipe, results in significant pressure loss at the connection points, hindering dust absorption. Summary of the Invention

[0005] The purpose of this invention is to provide a dust collection device and a PCB processing system for PCB processing, aiming to solve the problem of high pipe loss in existing dust collection devices.

[0006] The present invention is implemented as follows: a dust collection device for PCB processing, the dust collection device for PCB processing includes a main pipe and several branch pipes;

[0007] The outlet of the main pipe is connected to the negative pressure device and the dust removal device, and a control valve is installed on the main pipe;

[0008] The main pipe is provided with a connecting structure, and the branch pipe is connected to the main pipe through the connecting structure; the connecting structure is composed of several connecting segments connected in sequence, and the diameter of the connecting segment closer to the main pipe is larger; each connecting segment connects at least one branch pipe, and the angle between the airflow direction of the branch pipe at the connection and the airflow direction in the corresponding connecting segment is less than 90 degrees.

[0009] Another objective of this invention is to provide a PCB processing system, the PCB processing system comprising:

[0010] A workbench is used to place PCB boards.

[0011] Processing equipment, wherein the processing equipment is mounted above the worktable, is used for machining PCB boards; and

[0012] The dust collection device for PCB processing described in this invention is used to transport dust from each processing station to a dust removal device.

[0013] The solution provided by this invention connects the main pipe and the branch pipe by setting a connecting structure. By utilizing the connecting sections in the connecting structure, the angle at each airflow convergence is reduced, pressure loss is reduced, and dust deposition in the pipe is reduced. Furthermore, the airflow is greater closer to the main pipe, and the diameter of the connecting section is also larger, so that the airflow can maintain a more stable speed. When the airflows from different directions converge, they form a spiral superposition, which easily carries away dust in the pipe and improves the dust collection effect. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a dust collection device for PCB processing provided in an embodiment of the present invention;

[0015] Figure 2 This is a bottom view of the dust collection device for PCB processing provided in an embodiment of the present invention;

[0016] Figure 3 The three-dimensional structure of the dust collection hood for the PCB processing dust collection device provided in the embodiment of the present invention. Figure 1 ;

[0017] Figure 4 The three-dimensional structure of the dust collection hood for the PCB processing dust collection device provided in the embodiment of the present invention. Figure 2 ;

[0018] Figure 5 This is a half-sectional view of the dust collection device for PCB processing provided in an embodiment of the present invention;

[0019] Figure 6 This is a front view of the PCB processing system provided in an embodiment of the present invention;

[0020] Figure 7 This is a top view of the PCB processing system provided in an embodiment of the present invention;

[0021] Figure 8 A side view of a PCB processing system provided in an embodiment of the present invention;

[0022] In the attached diagram: 1. Main pipe; 2. Branch pipe; 3. Connecting structure; 4. Control valve; 5. Drive cylinder; 6. Base plate; 7. Sliding block; 8. Dust inlet; 9. Slide groove; 10. Dust hood; 11. Guide ring; 12. Connecting block; 13. Connecting port; 14. Rotating shaft; 15. First support rod; 16. Arc plate; 17. Second support rod; 18. Workbench; 19. Processing equipment. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0024] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0025] like Figure 1-5 As shown in the figure, an embodiment of the present invention provides a dust collection device for PCB processing, which includes a main pipe 1 and several branch pipes 2;

[0026] The outlet of the main pipe 1 is connected to the negative pressure device and the dust removal device, and a control valve 4 is installed on the main pipe 1;

[0027] The main pipe 1 is provided with a connecting structure, and the branch pipe 2 is connected to the main pipe 1 through the connecting structure; the connecting structure is composed of several connecting segments connected in sequence, and the diameter of the connecting segment closer to the main pipe 1 is larger; each connecting segment connects at least one branch pipe 2, and the airflow direction of the branch pipe 2 at the connection point is less than 90 degrees from the airflow direction in the corresponding connecting segment.

[0028] In this embodiment, it should be noted that the present invention is based on PCB processing, but as a dust collection device, it can be used in other fields. Therefore, the subject matter of the present invention also includes a dust collection device.

[0029] In this embodiment, the negative pressure device and the dust removal device can be referred to the prior art. Typically, the negative pressure device is a vacuum pump, and the dust removal device can be a filter layer, a dust collection bag, etc., which is the content of the prior art.

[0030] In this embodiment, a control valve 4 is provided on the main pipe 1. The control valve 4 can control the opening degree of the main pipe 1. The control valve can be a butterfly valve, ball valve, slide gate valve, etc., and the control method of the control valve can be electromagnetic, pneumatic, hydraulic, etc.

[0031] In this embodiment, the diameter of branch pipe 2 is smaller than that of main pipe 1. Preferably, the diameter of branch pipe 2 is less than or equal to the minimum diameter of the connecting section in the connection structure. Further, the angle between the airflow direction of branch pipe 2 at the connection and the airflow direction within the corresponding connecting section is less than 90 degrees, and the smaller the better, preferably less than 45 degrees. It can be understood that the airflow here refers to the overall direction of the airflow in the corresponding pipe, without considering airflow vortices or spiral states. In this embodiment, the connecting section can be welded from steel pipes, and main pipe 1 can also be made of steel pipe. In this embodiment, preferably, each connecting section connects only one branch pipe 2.

[0032] The solution provided by this invention connects the main pipe 1 and the branch pipe 2 by setting a connecting structure. By utilizing the connecting sections in the connecting structure, the angle at each airflow convergence is reduced, pressure loss is reduced, and dust deposition in the pipe is reduced. Furthermore, the airflow is greater closer to the main pipe 1, and the diameter of the connecting section is also larger, so that the airflow can maintain a relatively stable speed. When the airflows from different directions converge, they form a spiral superposition, which makes it easier to carry away dust in the pipe and improve the dust collection effect.

[0033] Preferably, two adjacent connecting sections are eccentrically positioned, and the direction of the deviation is opposite to the direction of the branch pipe 2 on the larger diameter connecting section.

[0034] In this embodiment, two adjacent connecting sections are set to be eccentric, so that when the airflow enters the next connecting section from the previous connecting section, a certain angle is formed, thereby better mixing with the airflow input from the branch pipe 2 of the next connecting section.

[0035] Preferably, the angle between the direction of the airflow at the outlet of the connection structure and the direction of the airflow in the main pipe 1 is less than 90 degrees.

[0036] In this embodiment, the included angle is further less than 45 degrees. The smaller the angle, the less the loss, but the higher the requirements for the structure. In practice, it can be set at around 30 degrees.

[0037] Preferably, the branch pipe 2 is a flexible hose.

[0038] In this embodiment, the branch pipe 2 is made of a flexible hose, which makes it easy to connect to the dust hood 10, and gives the branch pipe 2 a larger curvature, reducing the air pressure loss inside the pipe.

[0039] Preferably, the air inlet end of the branch pipe 2 is located on the processing head, and the processing head is provided with a dust suction hood 10, and the branch pipe 2 is connected to the dust outlet of the dust suction hood 10.

[0040] In this embodiment, by setting up a dust suction hood 10, the dust generated during machining can be sucked into the branch pipe 2, effectively preventing the dust from escaping.

[0041] Preferably, the dust hood 10 is configured as a hollow columnar structure, and a bottom plate 6 is provided at the bottom of the dust hood 10. A transverse sliding groove 9 is provided on the bottom plate 6, and a sliding block 7 is provided in the transverse sliding groove 9. A driving cylinder 5 is provided on the side of the bottom plate 6, and the driving cylinder 5 is used to drive the sliding block 7 to slide in the transverse sliding groove 9.

[0042] The sliding block 7 is provided with a dust inlet 8, and the lower end face of the dust inlet 8 is provided with several circumferential cuts, which are spiraled in one direction.

[0043] An opening is provided at the center of the base plate 6, and the shape and size of the opening match the dust inlet 8.

[0044] The bottom inner side of the dust hood 10 is cone-shaped, and a guide ring 11 is provided on the cone-shaped surface. The guide ring 11 has a notch facing the air inlet of the branch pipe 2.

[0045] Branch pipe 2 is connected to the side wall of the dust hood 10, and the air inlet of branch pipe 2 faces the conical surface.

[0046] In this embodiment, "lateral" refers to the direction parallel to the base plate 6, and the lateral sliding groove is located in the middle of the base plate 6. The dust inlet 8 is annular, with circumferential cuts on the downward-facing end face of the dust inlet 8 arranged spirally, so that the airflow entering the dust inlet 8 under negative pressure forms an initial vortex. The sliding block 7 is driven to slide by the driving cylinder 5, so that the dust inlet 8 is directly opposite or offset from the outlet, thereby controlling the air intake volume.

[0047] In this embodiment, the interior of the dust hood 10 is set as a conical surface. The airflow entering the dust hood 10 flows upward along the conical surface into the branch pipe 2. A guide ring 11 is provided inside the conical surface, which can guide the airflow near the conical surface into the branch pipe 2.

[0048] Preferably, there are two connection structures, which are symmetrically arranged on both sides of the main pipe 1.

[0049] In this embodiment, two connection structures are provided, which can be used to balance the airflow by utilizing the symmetry of the connection structures, and at the same time, the connection of branch pipe 2 can be expanded.

[0050] Preferably, the blind end of the main pipe 1 is provided with a connecting block 12, the connecting block 12 is configured as a columnar structure with a semi-circular cross-section, and there are two connecting blocks 12, which are joined together to form a cylinder;

[0051] Each connecting block 12 corresponds to one of the aforementioned connecting structures. Each connecting block 12 has a connecting port 13. A spring is provided at the bottom of each connecting block 12 and at the blind end seal of the main pipe 1.

[0052] When the top of the connecting block 12 is pressed into a negative pressure, the connecting block 12 is attracted to move upward, thereby allowing the connecting port 13 inside the connecting block 12 to connect the connecting structure with the main pipe 1.

[0053] In this embodiment, the blind pipe of the main pipe 1 can be opened with a through hole to communicate with the outside, so as to facilitate the movement of the connecting block 12 under negative pressure. The connecting block 12 and the wall of the main pipe 1 are sealed and slidingly fitted, as are the connecting blocks 12 with each other.

[0054] Preferably, a locking structure is also provided at the connection position between the connecting structure and the main pipe 1, the locking structure including an arc plate 16 and a support rod;

[0055] The arc-shaped plate 16 is disposed on the rotating shaft 14, and a torsion spring is disposed between the arc-shaped plate 16 and the rotating shaft 14. The torsion spring is used to keep the arc-shaped plate 16 in the connecting structure, and the arc-shaped surface of the arc-shaped plate 16 matches the wall shape of the connecting opening 13.

[0056] The support rod includes a first support rod 15 and a second support rod 17. The first support rod 15 is arranged radially along the rotating shaft 14, and the second support rod 17 is arranged circumferentially along the rotating shaft 14. One end of the second support rod 17 is connected to the first support rod 15, and the other end is connected to the top of the arc plate 16. The second support rod 17 is arc-shaped.

[0057] A negative pressure is formed inside the main pipe 1, and the connecting block 12 moves upward to connect the main pipe 1 and the connecting structure through the connecting port 13. When at least one of the branch pipes 2 connected to the connecting structure is opened, the airflow formed inside the connecting structure causes the arc plate 16 to flip towards the main pipe 1 until it fits against the inner wall of the connecting port 13. The second support rod 17 is located at the upper edge of the inlet of the connecting port 13, pressing against the connecting block 12 to prevent the connecting block 12 from resetting under the action of the spring, thus locking the connecting block 12. When all the branch pipes 2 of the connecting structure are closed, the airflow inside the connecting structure disappears, and the instantaneously increased negative pressure inside the main pipe 1 causes the connecting block 12 to move upward. The arc plate 16 resets under the action of the torsion spring, and the second support rod 17 disengages from the connecting port 13. After the negative pressure disappears, the connecting block 12 resets under the action of the spring.

[0058] In this embodiment, the rotating shaft 14 passes through the largest connecting section of the connecting structure. When the torque is relaxed, the arc-shaped plate 16 is approximately perpendicular to the axis of the connecting section, and the first support rod 15 is approximately parallel to the lower inner surface of the connecting section with the largest diameter. The connecting block 12 slides upward to connect the main pipe 1 with the connecting structure. If a branch pipe 2 is opened at this time, the airflow in the branch pipe 2 quickly enters the main pipe 1, causing the arc-shaped plate 16 to flip and adhere to the inner wall of the connecting port 13. When the branch pipe 2 is connected to the main pipe 1, the air pressure in the main pipe 1 drops suddenly. Under the action of the spring, the connecting block 12 moves downward, but at this time, due to the action of the second support rod 17, the connecting block 12 is prevented from resetting, thus locking the connecting block 12. When all the branch pipes 2 of the connecting block 12 are open, due to the opening of the branch pipe 2 corresponding to another connecting block 12, the air pressure in the main pipe 1 drops compared to before the connection, and the connecting block 12 with the branch pipe 2 not open resets under the action of the spring. This structure achieves selective opening of the connecting block 12. In this embodiment, a limiting structure can be further provided inside the main pipe 1 to limit the highest upward position of the connecting block 12. When the connecting block 12 moves to this position, the top edge of the connecting port 13 is slightly higher than the top of the inlet of the connecting structure 3, thereby allowing the second support rod 17 to be reset or flipped into place.

[0059] like Figure 6-8 As shown, the present invention also provides a PCB processing system, the PCB processing system comprising:

[0060] Workbench 18, Workbench 18 is used to place PCB boards;

[0061] Processing equipment 19, which is disposed above worktable 18, is used for machining PCB boards; and

[0062] The dust collection device for PCB processing as described in any embodiment of the present invention is used to transport dust from each processing station to a dust removal device.

[0063] In this embodiment, the worktable 18 and the processing equipment 19 can be referred to the prior art. The present invention does not involve any changes to the worktable 18 and the processing equipment 19 themselves.

[0064] The PCB processing system or any object processing system provided by this invention connects the main pipe 1 and the branch pipe 2 through a connecting structure. By utilizing the various connecting sections in the connecting structure, the angle at each airflow convergence is reduced, pressure loss is reduced, and dust deposition in the pipe is reduced. Furthermore, the airflow is greater closer to the main pipe 1, and the diameter of the connecting section is also larger, so that the airflow can maintain a relatively stable speed. When the airflows from different directions converge, they form a spiral superposition, which easily carries away dust in the pipe and improves the dust collection effect.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dust suction device for PCB processing, characterized by, The dust suction device for PCB processing comprises a main pipe and a plurality of branch pipes; The gas outlet end of the main pipe is connected with a negative pressure device and a dust removal device, and a control valve is arranged on the main pipe; A connecting structure is arranged on the main pipe, the branch pipes are connected with the main pipe through the connecting structure, the connecting structure is sequentially connected by a plurality of connecting sections, the diameter of the connecting section closer to the main pipe is larger, each connecting section is connected with at least one branch pipe, and the included angle between the airflow direction of the branch pipe at the connecting position and the airflow direction in the corresponding connecting section is less than 90 degrees; Two connecting structures are arranged symmetrically on both sides of the main pipe. A communication block is arranged at the blind end of the main pipe, the communication block is arranged as a columnar structure with a semicircular cross section, two communication blocks are combined to form a cylindrical structure, each communication block corresponds to one connecting structure, a communication port is formed in each communication block, and a spring is arranged at the bottom of each communication block and the blind end sealing portion of the main pipe. When the top of the communication block is under negative pressure, the communication block is attracted to move upward so that the communication port in the communication block is communicated with the connecting structure and the main pipe. A locking structure is further arranged at the connecting position of the connecting structure and the main pipe, and the locking structure comprises an arc-shaped plate and a support rod. The arc-shaped plate is arranged on a rotating shaft, a torsion spring is arranged between the arc-shaped plate and the rotating shaft, the torsion spring is used to keep the arc-shaped plate in the connecting structure, and the arc surface of the arc-shaped plate is matched with the wall surface of the communication port. The support rod comprises a first support rod and a second support rod, the first support rod is arranged along the radial direction of the rotating shaft, the second support rod is arranged along the circumferential direction of the rotating shaft, one end of the second support rod is connected with the first support rod, the other end of the second support rod is connected with the top of the arc-shaped plate, and the second support rod is arranged in an arc shape. When the negative pressure is formed in the main pipe, the communication block moves upward to communicate the communication port with the main pipe and the connecting structure, when at least one of the branch pipes connected with the connecting structure is opened, the airflow formed in the connecting structure makes the arc-shaped plate turn over to the side of the main pipe until the arc-shaped plate is attached to the inner wall of the communication port, the second support rod is located at the upper edge of the communication port entrance and resists the communication block to prevent the communication block from being reset under the action of the spring to realize the locking of the communication block, when all the branch pipes of the connecting structure are closed, the airflow in the connecting structure disappears, the temporarily increased negative pressure in the main pipe makes the communication block move upward, the arc-shaped plate is reset under the action of the torsion spring, the second support rod is separated from the communication port, and the communication block is reset under the action of the spring after the negative pressure disappears. The two adjacent connecting sections are arranged eccentrically, and the eccentric direction is opposite to the direction of the branch pipe on the connecting section with a larger diameter.

2. The dust collection device for PCB processing according to claim 1, characterized by The included angle between the airflow direction of the connecting structure outlet and the airflow direction in the main pipe is less than 90 degrees.

3. The dust collection device for PCB processing according to claim 1, characterized by The branch pipe is a flexible pipe.

4. The dust collection device for PCB processing according to claim 1, characterized by The gas inlet end of the branch pipe is arranged on a processing head, a dust suction cover is arranged on the processing head, and the branch pipe is connected with the dust outlet of the dust suction cover.

5. The dust collection device for PCB processing according to claim 1, wherein The dust suction cover is arranged as a hollow columnar structure, the bottom of the dust suction cover is provided with a bottom plate, a transverse sliding groove is formed in the bottom plate, a sliding block is arranged in the transverse sliding groove, and the side of the bottom plate is provided with a driving cylinder for driving the sliding block to slide in the transverse sliding groove.

6. The dust collection device for PCB processing according to claim 5, wherein ​ The sliding block is provided with a dust inlet, and a plurality of annular cuts are formed on the lower end surface of the dust inlet and spiral in one direction; A through hole is formed at the center of the bottom plate, and the through hole is matched with the dust inlet in shape and size; The inner bottom of the dust cover is conical, and a guide ring is arranged on the conical surface, and the guide ring is provided with a notch facing the air inlet of the branch pipe; The branch pipe is connected to the side wall of the dust cover, and the air inlet of the branch pipe faces the conical surface.

7. A PCB processing system characterized by comprising: The PCB processing system comprises: A workbench for placing the PCB board; A processing device arranged above the workbench for machining the PCB board; and The dust suction device for PCB processing according to any one of claims 1-6 is used to transport the dust of each machining position to the dust removal device.

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