Automatic particle removing device for abrasive paper production line

Abstract

The invention discloses an automatic particle removing device for an abrasive paper production line, which comprises a horizontally arranged device base and a conveying frame fixedly arranged above the device base, a conveying belt driven by a motor is arranged in the conveying frame, and abrasive paper products needing to be conveyed are sequentially arranged above the conveying belt. Two mounting frames are fixedly mounted above the conveying frame, a filter box is fixedly mounted on the upper surfaces of the mounting frames and connected with a dust suction pipe, an exhaust pipe with a negative pressure pump is fixedly mounted on the side face of the filter box, and the dust suction pipe sucks particles and dust on the surfaces of abrasive paper products into the filter box through negative pressure. According to the automatic particle removing device for the abrasive paper production line, the motor is used for driving the conveying belt to rotate, so that the conveying belt is used for conveying abrasive paper products, in the process, negative pressure generated by the negative pressure pump is used for enabling the dust suction pipe to adsorb particle impurities on the surfaces of the abrasive paper products into the filter box, and the particle removing purpose is achieved.

Description

Technical Field

[0001] This invention relates to the field of sandpaper production and conveying technology, specifically to an automatic particle removal device for sandpaper production lines. Background Technology

[0002] Sandpaper is a tool used for grinding, polishing, or sanding the surface of objects. It is made by adhering a layer of hard abrasive particles to a flexible substrate. In its production process, the cut sandpaper needs to be transported between the upper and lower processes using a conveyor device (usually a conveyor belt). The cut sandpaper products are placed on the conveyor belt in sequence, and the rotation of the conveyor belt is used to transport the sandpaper horizontally to the designated position.

[0003] As in the prior art, Chinese Patent Application No. 201821586881.X discloses a dust removal mechanism for a coated alumina sandpaper conveying equipment, including a conveying pipe. The internal area of ​​the conveying pipe is divided into a conveying zone and a dust removal zone by a partition. The two ends of the dust removal zone are respectively provided with a high-speed gas inlet pipe and an outlet pipe. Venturi holes are evenly distributed on the partition. The conveying zone and the dust removal zone are connected through the Venturi holes. A row of conveying rollers is supported by a bracket in the conveying zone. The conveying rollers near the two ends are used as drive rollers. A drive motor and a pressure roller are provided above the drive rollers. A sealing cover with a dust scraper is provided on the outside of the pressure roller. The sealing cover is connected to the dust removal zone through a thin tube. By designing the pipe as a double-layer structure, when conveying sandpaper belt in the conveying zone, the negative pressure generated by the high-speed movement of gas in the dust removal zone can be used to remove alumina sand particles from the bottom of the conveying zone and dust from the sealing cover.

[0004] For example, in the prior art, Chinese Patent Application No. 202321189785.2 discloses a dust removal mechanism for a coated alumina sandpaper conveying line, including a conveying component and a dust removal component. The conveying component includes a trough plate, a conveying roller shaft, a pulley and a transmission belt. The upper ends of the two side plates of the trough plate are symmetrically provided with mounting slots, and the two ends of the mounting slots are provided with fastening screw holes. The dust removal component includes a dust removal seat, a mounting seat, a fastening screw, a limiting roller, a suction pipe and a dust removal pipe. The limiting roller is supported between two mounting seats. The dust removal seat has a cavity inside. The lower side of the dust removal seat is evenly distributed with suction holes. One end of the suction pipe is connected to the dust removal pipe, and the other end passes through the adjacent mounting seat and is connected to the cavity of the dust removal seat.

[0005] For example, in the prior art, Chinese Patent Application No. 202123382446.X discloses a particle removal device for sandpaper conveying equipment, belonging to the field of sandpaper production technology. It includes a conveyor belt body, a dust collection device, a mounting frame, a cleaning device, a scraping device, and a waste box. The conveyor belt body is horizontally arranged, the dust collection device is arranged above the conveyor belt body, the mounting frame is horizontally arranged, the cleaning device is arranged at the top of the mounting frame, the scraping device is arranged in the lower half of the mounting frame, and the waste box is installed on the mounting frame and located below the conveyor belt body. The conveyor belt body horizontally passes through the dust collection device and the mounting frame.

[0006] Based on the above information, it can be seen that existing sandpaper conveying devices generally have a dust removal device installed on them to clean the particles remaining on the sandpaper surface through negative pressure. However, in actual use, particles may become embedded in the gaps of the sandpaper, and the cleaning effect of simple negative pressure is limited. Summary of the Invention

[0007] The purpose of this invention is to provide an automatic particle removal device for sandpaper production lines, in order to solve the problem of limited cleaning effect during the conveying process mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an automatic particle removal device for a sandpaper production line, comprising a horizontally placed device base and a conveyor frame fixedly installed above the device base. A motor-driven conveyor belt is installed inside the conveyor frame. Sandpaper products to be conveyed are placed sequentially above the conveyor belt. Two mounting frames are fixedly installed above the conveyor frame. A filter box is fixedly installed on the upper surface of the mounting frame. The filter box is connected to a dust suction pipe. An exhaust pipe with a negative pressure pump is fixedly installed on the side of the filter box. The dust suction pipe uses negative pressure to suck particles and dust from the surface of the sandpaper products into the filter box, achieving particle removal. A connecting box is fixedly installed on the inner wall of the conveyor frame. A horizontally arranged blower pipe is fixedly installed on the side of the connecting box. The blower pipe is located inside the conveyor belt. Air inside the blower pipe passes through a through-hole on its upper surface and through ventilation holes in the conveyor belt, blowing the sandpaper products and shaking off surface particles.

[0009] Preferably, a diversion pipe is fixedly installed on the upper surface of the connecting box. The upper end of the diversion pipe is connected to the exhaust pipe through a diversion pump. Part of the air in the exhaust pipe enters the interior of the connecting box through the diversion pipe. During the negative pressure particle removal process, part of the air in the exhaust pipe enters the diversion pipe through the diversion pump and finally enters the connecting box through the diversion pipe.

[0010] Preferably, the blower pipe is fixedly connected to the connecting box, and a pressure valve is fixedly installed at the end of the blower pipe. When the pressure in the connecting box reaches the threshold of the pressure valve, the air inside the connecting box enters the blower pipe and is discharged from the through hole above the blower pipe. The discharged air passes through the ventilation hole of the conveyor belt and blows towards the sandpaper product. Under the action of the airflow, the sandpaper product swings, and the swing shakes off the particles on the surface of the sandpaper product.

[0011] Preferably, a clamping rod is fixedly installed on the lower surface of the mounting frame. The lower end of the clamping rod contacts and clamps the sandpaper product above the conveyor belt through its own elasticity. The clamping rod below the mounting frame clamps and fixes the sandpaper product, preventing the sandpaper body from being blown off course when the airflow blows the sandpaper product. Limiting strips that push the sandpaper product to move are provided at equal intervals on the outer surface of the conveyor belt.

[0012] Preferably, the clamping rod is made entirely of iron, and a grounding wire is connected to the upper end of the clamping rod. The clamping rod is made of iron and connected to the grounding wire, so as to eliminate the static electricity of the sandpaper product when it comes into contact with the sandpaper product and reduce the adsorption of particles by static electricity.

[0013] Preferably, a cleaning curtain is provided on the left side of the mounting frame, and a telescopic cylinder for adjusting the height is fixedly installed between the upper end of the cleaning curtain and the mounting frame.

[0014] Preferably, a first piston plate arranged horizontally is installed inside the connecting box. The first piston plate slides against the inner wall of the connecting box and is located at the lower end of the inlet of the blower pipe. A return spring is fixedly installed between the upper surface of the first piston plate and the inner wall of the connecting box. A connecting rod is fixedly installed on the lower surface of the first piston plate, and a striking block for striking the conveyor belt is fixedly installed at the lower end of the connecting rod. The connecting rod is slidably connected to the connecting box. When the striking block strikes the conveyor belt, the particles shaken off fall into the storage chamber inside the device base. When the pressure inside the connecting box increases, it pushes the first piston plate inside to move downward. During the downward movement of the first piston plate, the striking block is pushed to move downward synchronously through the connecting rod. At this time, the striking block strikes and squeezes the conveyor belt.

[0015] Preferably, a second piston plate is slidably connected to the blower pipe, and a connecting spring is fixedly installed between the second piston plate and the inner wall of the blower pipe. When air enters the blower pipe, it pushes the second piston plate inside to move, gradually opening the through hole, so that the airflow ejected from the blower pipe gradually expands, which can blow different positions of the sandpaper product at one time, so that the sandpaper product can swing better.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the automatic particle removal device for sandpaper production lines adopts a novel structural design, the specific details of which are as follows: 1. The conveyor belt is driven by a motor to rotate, thereby conveying the sandpaper products. During this process, the negative pressure generated by the negative pressure pump causes the dust suction pipe to adsorb particulate impurities on the surface of the sandpaper products into the filter box, thus achieving the purpose of particle removal. Furthermore, during the negative pressure particle removal process, some air in the exhaust pipe enters the diversion pipe through the diversion pump, and finally enters the connecting box through the diversion pipe. When the pressure in the connecting box reaches the threshold of the pressure valve, the air inside the connecting box enters the blower pipe and is discharged from the through hole above the blower pipe. The discharged air passes through the ventilation holes of the conveyor belt and blows towards the sandpaper product. Under the action of airflow, the sandpaper product swings, and the swing shakes off the particles on the surface of the sandpaper product, improving the cleaning effect.

[0017] 2. When the sandpaper is transported to the bottom of the mounting frame, the clamping rods under the mounting frame are used to clamp and fix the sandpaper to prevent the sandpaper from being blown off course by the airflow. The clamping rods are made of iron and are connected to the grounding wire. When they come into contact with the sandpaper, they eliminate the static electricity of the sandpaper and reduce the static electricity's adsorption effect on the particles.

[0018] 3. When the internal pressure of the connecting box increases, it pushes the first piston plate inside to move downward. During the downward movement of the first piston plate, the striking block is pushed to move downward synchronously through the connecting rod. At this time, the striking block strikes and squeezes the conveyor belt. The conveyor belt vibrates when it is struck, and the vibration cleans some sandpaper particles attached to the surface of the conveyor belt. The shaken-off sandpaper particles fall into the storage bin inside the base of the device. Furthermore, when air enters the blower pipe, it pushes the second piston plate inside to move, gradually opening the through hole, so that the airflow ejected from the blower pipe gradually expands, which can blow different positions of the sandpaper product at once, allowing the sandpaper product to swing better. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the base structure of the device of the present invention; Figure 3 This is a schematic diagram of the mounting frame structure of the present invention; Figure 4 This is a schematic diagram showing the positional relationship between the connecting box and the conveyor belt in this invention; Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 This is a schematic diagram of the lower surface structure of the mounting bracket of the present invention; Figure 7 For the present invention Figure 6 Enlarged structural diagram at point B; Figure 8This is a schematic diagram of the connection relationship between the connecting box and the exhaust pipe of the present invention; Figure 9 This is a schematic diagram of the internal structure of the connecting box of the present invention; Figure 10 This is a schematic diagram of the striking block structure of the present invention; Figure 11 This is a schematic diagram of the internal structure of the blower pipe of the present invention.

[0020] In the diagram: 1. Device base; 2. Conveyor frame; 3. Conveyor belt; 4. Sandpaper product; 5. Mounting frame; 6. Filter box; 7. Suction pipe; 8. Exhaust pipe; 9. Negative pressure pump; 10. Connecting box; 11. Blower pipe; 12. Through hole; 13. Diverter pipe; 14. Diverter pump; 15. Ventilation hole; 16. Limiting strip; 17. Clamping rod; 18. Grounding wire; 19. Cleaning curtain; 20. Telescopic cylinder; 21. Pressure valve; 22. First piston plate; 23. Return spring; 24. Connecting rod; 25. Striking block; 26. Storage compartment; 27. Second piston plate; 28. Connecting spring. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1: Please refer to Figures 1-8To improve particle removal during conveying, this embodiment provides the following technical solution: A horizontally placed device base 1 and a conveyor frame 2 fixedly installed above the device base 1. A motor-driven conveyor belt 3 is installed inside the conveyor frame 2. Sandpaper products 4 to be conveyed are placed sequentially above the conveyor belt 3. Two mounting frames 5 are fixedly installed above the conveyor frame 2. A filter box 6 is fixedly installed on the upper surface of the mounting frame 5. The filter box 6 is connected to a dust suction pipe 7. An exhaust pipe 8 with a negative pressure pump 9 is fixedly installed on the side of the filter box 6. The dust suction pipe 7 uses negative pressure to suck particles and dust from the surface of the sandpaper products 4 into the filter box 6. A connecting box 10 is fixedly installed on the inner wall of the conveyor frame 2. A horizontally arranged blower pipe 11 is fixedly installed on the side of the connecting box 10. The blower pipe 11 is located inside the conveyor belt 3. Air inside the blower pipe 11 passes through a through-hole 12 on its upper surface and through ventilation holes 15 in the conveyor belt 3, blowing the sandpaper products... Product 4, shake off the particles on the surface of sandpaper product 4. A diversion pipe 13 is fixedly installed on the upper surface of the connecting box 10. The upper end of the diversion pipe 13 is connected to the exhaust pipe 8 through the diversion pump 14. Part of the air in the exhaust pipe 8 enters the interior of the connecting box 10 through the diversion pipe 13. The blower pipe 11 is fixedly connected to the connecting box 10. A pressure valve 21 is fixedly installed at the end of the blower pipe 11. When the air pressure inside the connecting box 10 exceeds the threshold of the pressure valve 21, air enters the blower pipe 11. A clamping rod 17 is fixedly installed on the lower surface of the mounting frame 5. The lower end of the clamping rod 17 contacts and clamps the sandpaper product 4 above the conveyor belt 3 with its own elasticity. Limiting strips 16 that push the sandpaper product 4 to move are set at equal intervals on the outer surface of the conveyor belt 3. The clamping rod 17 is made of iron material and the upper end of the clamping rod 17 is connected to a grounding wire 18. A cleaning curtain 19 is set on the left side of the mounting frame 5. A telescopic cylinder 20 for adjusting the height is fixedly installed between the upper end of the cleaning curtain 19 and the mounting frame 5.

[0023] When using the device, turn on the motor to drive the conveyor belt 3 to rotate. Then, place the produced sandpaper products 4 sequentially above the conveyor belt 3 from the right side. The conveyor belt 3 transports the sandpaper products 4 from right to left. When the sandpaper products 4 are transported to the bottom of the mounting frame 5, the clamping rod 17 under the mounting frame 5 uses its own elasticity to clamp and fix the sandpaper products 4. The clamping rod 17 is made of iron. The grounding wire 18 connected to it guides the static electricity in the sandpaper products 4, reducing the static electricity's adsorption effect on the particles, which facilitates the subsequent particle removal operation. At this time, turn on the negative pressure pump 9 connected to the exhaust pipe 8. Under the action of the negative pressure pump 9, the dust suction pipe 7 sucks the particles on the surface of the sandpaper products 4 into the filter box 6. The particles are filtered by the filter screen inside the filter box 6 through the filter packing, achieving the purpose of particle removal. During the particle removal process, turn on the diversion pump 14. At this time, some of the air in the exhaust pipe 8 enters the diversion pump 14 through the diversion pump 14. In the flow pipe 13, the air enters the connecting box 10 through the diversion pipe 13, and finally enters the blower pipe 11 through the connecting box 10 and exits through the through hole 12 above the blower pipe 11. The exhaust air passes through the ventilation hole 15 in the conveyor belt 3 and blows the sandpaper product 4, causing the sandpaper product 4 to swing. During this process, the clamping effect of the clamping rod 17 is used to prevent the sandpaper product 4 from moving randomly and shifting its position. The swinging motion shakes off the particles on the surface of the sandpaper product 4, improving the adsorption effect of the negative pressure on the particles. After the particles are removed, the conveyor belt 3 rotates again to continue conveying the sandpaper product 4 to the left. Since the clamping rod 17 has a clamping effect on the sandpaper product 4, the limiting strip 16 is used to force the sandpaper product 4 to be pushed. When the sandpaper product 4 passes through the cleaning curtain 19, the cleaning curtain 19 is used to finally brush and clean it. The height of the cleaning curtain 19 is adjusted by the telescopic cylinder 20 according to different sandpaper products 4.

[0024] Example 2: Please refer to Figures 9-11 In order to achieve the purpose of cleaning the conveyor belt 3, this embodiment provides the following technical solution, which specifically discloses: A first piston plate 22 is installed inside the connecting box 10, which is horizontally arranged. The first piston plate 22 slides against the inner wall of the connecting box 10 and is located at the lower end of the inlet of the blower pipe 11. A return spring 23 is fixedly installed between the upper surface of the first piston plate 22 and the inner wall of the connecting box 10. A connecting rod 24 is fixedly installed on the lower surface of the first piston plate 22, and a striking block 25 for striking the conveyor belt 3 is fixedly installed at the lower end of the connecting rod 24. The connecting rod 24 is slidably connected to the connecting box 10. When the striking block 25 strikes the conveyor belt 3, the particles shaken off fall into the storage chamber 26 inside the device base 1. A second piston plate 27 is installed inside the blower pipe 11 and slidably connected thereto. A connecting spring 28 is fixedly installed between the second piston plate 27 and the inner wall of the blower pipe 11.

[0025] When air enters the connecting box 10 through the diverter pipe 13, the internal pressure of the connecting box 10 continuously increases. Under the action of pressure, the first piston plate 22 inside the connecting box 10 moves downward. When the first piston plate 22 moves downward, it drives the striking block 25 to move downward synchronously through the connecting rod 24. The striking block 25 strikes the conveyor belt 3 below, causing the conveyor belt 3 to vibrate. Under the action of vibration, sandpaper particles that may be attached to the surface of the conveyor belt 3 are shaken off. The fallen particles enter the storage chamber 26 inside the device base 1 for collection, ultimately achieving the purpose of cleaning the conveyor belt 3. When the pressure reaches the threshold of the pressure valve 21, the pressure valve 21 opens, causing the connecting box 10 to move downward. Air from inside the blower 11 enters the blower pipe 11. The pressure valve 21 is electrically controlled and opens and closes periodically under program control. It opens when the pressure threshold is reached, closes after a period of time, and opens again when the pressure threshold is reached again. When air enters the blower pipe 11, it pushes the second piston plate 27 inside the blower pipe 11 to move. The movement of the second piston plate 27 gradually opens the through hole 12 above the blower pipe 11. That is, as the second piston plate 27 moves, the number of through holes 12 for air outlet gradually increases, thereby gradually expanding the air outlet range of the blower pipe 11. This achieves the purpose of blowing the sandpaper product 4 in sequence, making the sandpaper product 4 swing more evenly and achieving a better cleaning effect.

[0026] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic desizing device for a sandpaper production line, comprising a horizontally placed device base (1) and a conveyor frame (2) fixedly installed above the device base (1), wherein a conveyor belt (3) driven by a motor is installed inside the conveyor frame (2), characterized in that, Also includes: The sandpaper products (4) to be transported are placed on the conveyor belt (3) in sequence. Two mounting frames (5) are fixedly installed on the top of the conveyor frame (2). A filter box (6) is fixedly installed on the upper surface of the mounting frame (5). The filter box (6) is connected to the dust suction pipe (7). An exhaust pipe (8) with a negative pressure pump (9) is fixedly installed on the side of the filter box (6). The dust suction pipe (7) uses negative pressure to suck particles and dust on the surface of the sandpaper products (4) into the filter box (6). A connecting box (10) is fixedly installed on the inner wall of the conveyor frame (2). A horizontally arranged blower pipe (11) is fixedly installed on the side of the connecting box (10). The blower pipe (11) is located inside the conveyor belt (3). The air inside the blower pipe (11) passes through the ventilation hole (15) opened in the conveyor belt (3) through the through hole (12) on its upper surface and blows the sandpaper product (4) and shakes off the particles on the surface of the sandpaper product (4).

2. The automatic particle removal device for a sandpaper production line according to claim 1, characterized in that: A diversion pipe (13) is fixedly installed on the upper surface of the connecting box (10). The upper end of the diversion pipe (13) is connected to the exhaust pipe (8) through the diversion pump (14). Some of the air in the exhaust pipe (8) enters the interior of the connecting box (10) through the diversion pipe (13).

3. An automatic particle removal device for a sandpaper production line according to claim 2, characterized in that: The blower pipe (11) is fixedly connected to the connecting box (10). A pressure valve (21) is fixedly installed at the end of the blower pipe (11). When the air pressure inside the connecting box (10) exceeds the threshold of the pressure valve (21), air enters the blower pipe (11).

4. An automatic particle removal device for a sandpaper production line according to claim 3, characterized in that: The mounting bracket (5) has a clamping rod (17) fixedly installed on its lower surface. The lower end of the clamping rod (17) contacts and clamps the sandpaper product (4) above the conveyor belt (3) with its own elasticity. The outer surface of the conveyor belt (3) is provided with limit strips (16) at equal intervals to push the sandpaper product (4) to move.

5. An automatic particle removal device for a sandpaper production line according to claim 4, characterized in that: The clamping rod (17) is made of iron, and a grounding wire (18) is connected to the upper end of the clamping rod (17).

6. An automatic particle removal device for a sandpaper production line according to claim 1, characterized in that: A cleaning curtain (19) is provided on the left side of the mounting frame (5), and a telescopic cylinder (20) for adjusting the height is fixedly installed between the upper end of the cleaning curtain (19) and the mounting frame (5).

7. An automatic particle removal device for a sandpaper production line according to claim 1, characterized in that: The connecting box (10) is equipped with a horizontally arranged first piston plate (22). The first piston plate (22) slides against the inner wall of the connecting box (10) and is located at the lower end of the inlet of the blower pipe (11).

8. An automatic particle removal device for a sandpaper production line according to claim 7, characterized in that: A return spring (23) is fixedly installed between the upper surface of the first piston plate (22) and the inner wall of the connecting box (10).

9. An automatic particle removal device for a sandpaper production line according to claim 8, characterized in that: A connecting rod (24) is fixedly installed on the lower surface of the first piston plate (22), and a striking block (25) for striking the conveyor belt (3) is fixedly installed at the lower end of the connecting rod (24). The connecting rod (24) is slidably connected to the connecting box (10). When the striking block (25) strikes the conveyor belt (3), the particles shaken off fall into the storage bin (26) inside the device base (1).

10. An automatic particle removal device for a sandpaper production line according to claim 1, characterized in that: The blower pipe (11) is equipped with a second piston plate (27) that is slidably connected to it, and a connecting spring (28) is fixedly installed between the second piston plate (27) and the inner wall of the blower pipe (11).

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