Drying device for plate pickling production line

Abstract

The utility model relates to the technical field of plate processing, and discloses a plate pickling production line drying device which comprises a pickling conveyor, a washing conveyor, a drying processing machine box and a programmable logic controller. Each of the pickling conveyor and the washing conveyor comprises a roller, a hydraulic cylinder and a parting strip, a second conveyor belt is fixedly mounted on the drying treatment case, a third conveyor belt is fixedly mounted on the other side in the drying treatment case, and water-absorbing knitted layers are arranged on the outer surfaces of the first conveyor belt and the third conveyor belt; a telescopic plate is fixedly arranged on the outer surface of the second conveying belt; the third conveying belt is vertically arranged, the plates are sequentially driven by the telescopic plates on the third conveying belt to the position of the second conveying belt to be placed, the plates on the second conveying belt are preferentially dried through hot air and heat radiation after being flanged, heat borne by the plates is evenly distributed, the air contact face is wide, and the drying efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of sheet metal processing technology, and in particular to a drying device for a sheet metal pickling production line specifically designed for rapid and efficient drying of pickled sheets. Background Technology

[0002] In the modern sheet metal processing industry, pickling is a common method for removing oxide scale, rust, and other impurities from sheet metal surfaces. However, after pickling, a large amount of pickling solution and moisture adheres to the surface of the sheet metal. If not dried promptly and effectively, this can lead to numerous problems. On the one hand, the residual acid and moisture will react chemically on the sheet metal surface, causing rust and corrosion, severely affecting the appearance quality and service life of the sheet metal. On the other hand, if the damp sheet metal is used in subsequent processing steps, such as coating and stamping, it will reduce the adhesion of the coating, affect the precision and quality of stamping, and consequently impact the overall quality of the product.

[0003] Chinese Utility Model Patent No. CN207260497U discloses an energy-saving automatic production line for aluminum ceiling panel spraying and forming. This utility model provides an energy-saving automatic production line for aluminum ceiling panel spraying and forming, comprising, in sequence, an uncoiling mechanism, an aluminum sheet cleaning mechanism, an aluminum sheet drying mechanism, a multiple spraying and drying mechanism, a coating mechanism, a winding mechanism, and a cutting mechanism. The uncoiling mechanism has a looper buffer mechanism. The aluminum sheet cleaning mechanism includes an alkaline degreasing tank, a first washing tank, an acid washing tank, a second washing tank, a passivation tank, and a third washing tank. The multiple spraying and drying mechanism includes, in sequence, a primer spraying machine, a first drying box, a first printing spraying machine, a second drying box, and a waste heat circulation device connecting the two drying boxes. The coating mechanism includes a coating machine. The winding mechanism includes a winding tensioner, a winding motor, and a transmission mechanism. This energy-saving automatic production line for aluminum ceiling panel spraying and forming has the advantages of scientific design, prevention of aluminum sheet shrinkage, strong spraying and coloring, waste gas recycling to reduce pollution, optional multi-color printing, and fully automated forming. Regarding the aforementioned related technologies, the inventors believe that the following defects exist:

[0004] Current drying equipment on the market has many shortcomings. Some drying devices use a single heating method, where one side is heated to evaporate moisture, while the other side remains damp and needs further drying. This uneven heat distribution leads to inconsistent drying levels in the boards, resulting in areas that are either over-dry or under-dry. Other drying devices have low drying efficiency, failing to meet the demands of rapid board turnover in large-scale industrial production, creating a bottleneck in production efficiency and increasing costs. Furthermore, some drying devices have complex structures, are difficult to maintain, and frequently malfunction, affecting the continuous and stable operation of the production line. Therefore, developing a high-efficiency, uniform, stable, and easy-to-maintain drying device for a board pickling production line is of significant practical importance. Utility Model Content

[0005] To address the shortcomings of an energy-saving automatic production line for aluminum ceiling spraying and forming, this utility model provides a drying device for a sheet pickling production line. This device has the advantage of replacing manual turning of the sheets in the drying oven, and solves the problem of improving the continuous and stable operation of the production line and efficiently and uniformly drying the pickled sheets.

[0006] This utility model provides the following technical solution:

[0007] A drying device for a board pickling production line includes a pickling conveyor, a washing conveyor, a drying chamber, and a programmable logic controller (PLC). The pickling and washing conveyors are equipped with tiered washing tanks at their lower parts. Each conveyor includes rollers, hydraulic cylinders, and partitions. A hydraulic cylinder is fixedly connected to the bottom of the tiered washing tank. Rollers are rotatably connected to the side of a support at the top of the hydraulic cylinder. Partitions are fixedly installed on the side of the rollers. A first conveyor belt is fixedly installed on one side of the drying chamber. A second conveyor belt is fixedly installed in the middle of the inner wall of the drying chamber. A third conveyor belt is fixedly installed on the other side of the drying chamber. The outer surfaces of both the first and third conveyor belts are provided with absorbent knitted layers to absorb residual moisture from the board after pickling, reducing surface moisture. A telescopic plate is fixedly installed on the outer surface of the second conveyor belt.

[0008] Preferably, a magnetic layer is fixedly provided on the side of the telescopic plate, and a baffle is fixedly provided on one side of the magnetic layer. The telescopic plate is arranged in a circular array around the second conveyor belt.

[0009] Preferably, the drying chamber has quartz infrared heating tubes arranged in a linear array on its side, a centrifugal fan fixedly mounted on its side, an air nozzle fixedly mounted on the lower part of the centrifugal fan, and an air filter fixedly mounted on the top of the drying chamber, the air filter being connected to the centrifugal fan via a pipe.

[0010] Preferably, a wind box is fixedly installed on the side of the drying chamber, an exhaust fan is fixedly installed on the inner wall of the wind box, the exhaust fan penetrates the inner wall of the drying chamber, and a ventilation duct is fixedly installed on the top of the wind box, with the top of the ventilation duct fixedly connected to an air filter.

[0011] Preferably, a programmable logic controller (PLC) is fixedly installed on the side of the drying chamber, a touch screen is installed on the front of the PLC, a temperature sensor is installed on the side of the tiered washing tank, and a heating element controller is fixedly installed on the side of the drying chamber. The heating element controller is electrically connected to the PLC.

[0012] Preferably, the bottom of the drying chamber is provided with partitions on both sides, and the height of the partitions is higher than the maximum height of the air box.

[0013] Preferably, the side of the drying chamber is provided with a slide rail, and the interior of the slide rail is slidably connected to the slide rail by a slider of the first conveyor belt.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. In this utility model, alkaline washing and oxide film removal after acid washing and degreasing treatment are completed by pickling conveyor and water washing conveyor. The board is dried by heat radiation from the internal quartz infrared heating tube. The drying is accelerated by hot air circulation treatment through exhaust fan, ventilation duct and air filter. After drying a single surface of the board, the board is flipped over and continues to be dried on the upper part of the second conveyor belt. This improves the drying effect of the board and reduces the need for manual treatment of the board's shielding parts in a high-temperature environment, thus achieving efficient drying.

[0016] 2. In this utility model, by setting up an acid pickling conveyor and a water washing conveyor, water washing is carried out in a layered washing tank to realize the water-flow treatment of the board cleaning process, and the moisture of the cleaned boards is reduced in sequence, which helps the drying work of the boards after acid pickling and achieves better automated production results. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the hydraulic cylinder structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the external structure of the drying chamber of this utility model;

[0020] Figure 4 This is a plan view of the interior of the drying chamber of this utility model;

[0021] Figure 5 This is a schematic diagram of the first conveyor belt structure of this utility model;

[0022] Figure 6 This is a partial structural schematic diagram of the second conveyor belt of this utility model;

[0023] Figure 7 This is a schematic diagram of the internal structure of the bellows of this utility model.

[0024] In the diagram: 1. Pickling conveyor; 2. Washing conveyor; 3. Drying chamber; 4. Roller; 5. Hydraulic cylinder; 6. Layered washing tank; 7. Partition; 8. First conveyor belt; 9. Second conveyor belt; 10. Third conveyor belt; 11. Absorbent knitted layer; 12. Telescopic plate; 13. Magnetic layer; 14. Baffle; 15. Quartz infrared heating tube; 16. Centrifugal fan; 17. Air nozzle; 18. Air filter; 19. Temperature sensor; 20. Programmable logic controller; 21. Touch screen; 22. Air box; 23. Exhaust fan; 24. Ventilation duct; 25. Partition; 26. Heating element controller; 27. Slide rail. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-7A drying device for a sheet metal pickling production line includes a pickling conveyor 1, a washing conveyor 2, a drying chamber 3, and a programmable logic controller 20. The lower parts of the pickling conveyor 1 and the washing conveyor 2 are provided with tiered washing tanks 6. Both the pickling conveyor 1 and the washing conveyor 2 include rollers 4, hydraulic cylinders 5, and partitions 7. The bottom of the tiered washing tank 6 is fixedly connected to the hydraulic cylinder 5, and the rollers 4 are rotatably connected to the side of the support at the top of the hydraulic cylinder 5. Partitions 7 are fixedly installed on the side of the rollers 4. A first conveyor belt 8 is fixedly installed on one side inside the drying chamber 3, and a second conveyor belt 9 is fixedly installed in the middle of the inner wall of the drying chamber 3. The first conveyor belt 8 and the second conveyor belt 9 are high-strength conveyors. The high-strength, corrosion-resistant PTFE-coated stainless steel mesh belt can withstand the weight of the pickled sheet and the corrosion of acidic residues. It also has good air permeability, facilitating full contact between hot air and the sheet surface, thus improving drying efficiency. A third conveyor belt 10 is fixedly installed on the other side of the drying chamber 3. Both the first conveyor belt 8 and the third conveyor belt 10 have absorbent knitted layers 11 on their outer surfaces. These layers absorb residual moisture from the pickled sheet, reducing surface moisture. A telescopic plate 12 is fixedly installed on the outer surface of the second conveyor belt 9. The third conveyor belt 10 is vertically positioned, and the telescopic plate 12 supports the first conveyor belt 8. The sheet material, after being handed over and placed, undergoes edge-flipping in the high-temperature environment inside the drying chamber 3 as its angle of movement changes. As the telescopic plates 12 on the third conveyor belt 10 sequentially move the sheet material to the second conveyor belt 9, the sheet material on the second conveyor belt 9 becomes the priority drying position for hot air and heat radiation after edge-flipping, achieving uniform heat distribution and a wide air contact surface, thus accelerating drying efficiency. Quartz infrared heating tubes 15 are linearly arrayed on the side of the drying chamber 3, and a centrifugal fan 16 is fixedly installed on the side of the drying chamber 3. Air nozzles 17 are fixedly installed at the lower part of the centrifugal fan 16, and the top of the drying chamber 3 is fixed... An air filter 18 is fixedly installed, and the air filter 18 is connected to the centrifugal fan 16 through a pipe. The plate is dried by the heat radiation of the quartz infrared heating tube 15. The quartz infrared heating tube 15 has the advantages of fast heating speed, high heat conversion efficiency and long service life. With the programmable logic controller 20 intelligent temperature control module, the heating power can be adjusted independently, and the adjustment range is the rated power. A wind box 22 is fixedly installed on the side of the drying chamber 3. An exhaust fan 23 is fixedly installed on the inner wall of the wind box 22 and penetrates the inner wall of the drying chamber 3. A ventilation duct 24 is fixedly installed on the top of the wind box 22 and the top of the ventilation duct 24 is fixedly connected to the air filter 18.By setting up a top-down airflow, the air exposed on the upper surface of the conveyor belt is evenly blown onto the surface of the sheet material through a specially designed air duct. Combined with thermal radiation heating of the sheet material, the ventilation duct 24 and air filter 18 allow the return air to circulate within the air duct, filtering out impurities in the hot air, ensuring its cleanliness, preventing contamination of the sheet material surface, and achieving both air circulation and temperature increase to accelerate drying efficiency. The bottom of the drying chamber 3 is equipped with partitions 25 on both sides, the height of which is higher than the maximum height of the air box 22. By setting the partitions 25, the ventilated air is retained to the maximum extent, allowing it to be drawn by the exhaust fan 23 and finally discharged through the air filter 18, thus achieving air circulation.

[0027] A magnetic layer 13 is fixedly provided on the side of the telescopic plate 12, and a baffle 14 is fixedly provided on one side of the magnetic layer 13. The telescopic plate 12 is arranged in a ring array around the second conveyor belt 9. By setting the magnetic layer 13, the electromagnetic effect is activated under the control of the programmable logic controller 20. The plate placed on the magnetic layer 13 is magnetically attracted, and the plate is flipped as the ring moves.

[0028] A programmable logic controller (PLC) 20 is fixedly installed on the side of the drying chamber 3. A touch screen 21 is installed on the front of the PLC 20. The touch screen 21 has a human-machine interface of [specific size and brand]. The operation interface is simple and intuitive. Operators can set parameters such as drying temperature, conveyor belt speed, and hot air circulation intensity through the touch screen, and view the equipment's operating status, temperature data, fault alarms, and other information in real time. A temperature sensor 19 is installed on the side of the stratified washing tank 6. A heating element controller 26 is fixedly installed on the side of the drying chamber 3. The heating element controller 26 is electrically connected to the PLC 20. Through the modular design of the control system, including electrical control components or signal transmission components such as the acid washing conveyor 1, water washing conveyor 2, first conveyor belt 8, second conveyor belt 9, and temperature sensor 19, automated production is achieved, and fault information can be automatically recorded, facilitating maintenance personnel to quickly locate and troubleshoot faults.

[0029] The side of the drying chamber 3 is provided with a slide rail 27. The inside of the slide rail 27 is slidably connected to the slider of the first conveyor belt 8. The slide rail 27 is used to adjust the position laterally, so as to avoid the position of the first conveyor belt 8 from being affected by motion interference when the washing conveyor 2 sinks down to complete the cleaning of the board.

[0030] Working principle:

[0031] Step 1: After the equipment is installed, conduct a comprehensive inspection of the electrical system. After confirming that there are no short circuits, open circuits or other faults through the programmable logic controller 20, connect the power supply.

[0032] Step 2: Start pickling conveyor 1, washing conveyor 2 and drying treatment box 3, and observe whether the conveyor belt runs smoothly, and whether there is any abnormal noise or deviation. If there is any problem, adjust the position or tension of the rollers in time.

[0033] Step 3: Start the heating elements and exhaust fan 23 of each drying unit in sequence, monitor the temperature change in the drying area through temperature sensor 19, check whether the hot air circulation is normal, and fine-tune the power of the heating elements and the speed of the exhaust fan 23 according to the deviation between the actual temperature and the preset temperature until the temperature stabilizes within the preset range.

[0034] Step four: Place the pickled board on the conveyor belt and observe its state during the drying process. When the board passes through the second conveyor belt 9, the edge-flipping function of the board can be completed, achieving full drying of the board. Further optimize the drying parameters, such as adjusting the conveyor belt speed, increasing or decreasing the heating power, until the best drying effect is achieved.

Claims

1. A drying device for a board pickling production line, comprising a pickling conveyor (1), a washing conveyor (2), a drying processing unit (3), and a programmable logic controller (20), characterized in that: The pickling conveyor (1) and the washing conveyor (2) are provided with a layered washing tank (6) at their lower parts. Both the pickling conveyor (1) and the washing conveyor (2) include a roller (4), a hydraulic cylinder (5) and a partition (7). The bottom of the layered washing tank (6) is fixedly connected to the hydraulic cylinder (5). The roller (4) is rotatably connected to the side of the support at the top of the hydraulic cylinder (5). The partition (7) is fixedly provided on the side of the roller (4). A first conveyor belt (8) is fixedly installed on one side inside the drying chamber (3). A second conveyor belt (9) is fixedly installed in the middle of the inner wall of the drying chamber (3). A third conveyor belt (10) is fixedly installed on the other side inside the drying chamber (3). The outer surfaces of the first conveyor belt (8) and the third conveyor belt (10) are provided with a water-absorbing knitted layer (11). The water-absorbing knitted layer (11) is used to absorb the residual moisture of the board after pickling, so that the moisture on the surface of the board is reduced. A telescopic plate (12) is fixedly provided on the outer surface of the second conveyor belt (9).

2. The drying device for a board pickling production line according to claim 1, characterized in that: A magnetic layer (13) is fixedly provided on the side of the telescopic plate (12), and a baffle (14) is fixedly provided on one side of the magnetic layer (13). The telescopic plate (12) is arranged in a ring array around the second conveyor belt (9).

3. The drying device for a plate pickling production line according to claim 1, characterized in that: The drying chamber (3) is provided with a linear array of quartz infrared heating tubes (15) on its side. A centrifugal fan (16) is fixedly installed on the side of the drying chamber (3). A nozzle (17) is fixedly installed at the bottom of the centrifugal fan (16). An air filter (18) is fixedly installed on the top of the drying chamber (3). The air filter (18) is connected to the centrifugal fan (16) by a pipe.

4. The drying device for a plate pickling production line according to claim 3, characterized in that: A blower box (22) is fixedly installed on the side of the drying chamber (3), and an exhaust fan (23) is fixedly installed on the inner wall of the blower box (22). The exhaust fan (23) penetrates the inner wall of the drying chamber (3). A ventilation duct (24) is fixedly installed on the top of the blower box (22), and the top of the ventilation duct (24) is fixedly connected to an air filter (18).

5. The drying device for a plate pickling production line according to claim 1, characterized in that: A programmable logic controller (20) is fixedly installed on the side of the drying chamber (3). A touch screen (21) is installed on the front side of the programmable logic controller (20). A temperature sensor (19) is installed on the side of the layered washing tank (6). A heating element controller (26) is fixedly installed on the side of the drying chamber (3). The heating element controller (26) is electrically connected to the programmable logic controller (20).

6. The drying device for a plate pickling production line according to claim 1, characterized in that: The bottom of the drying chamber (3) is provided with partitions (25) on both sides, and the height of the partitions (25) is higher than the maximum height of the air box (22).

7. The drying device for a plate pickling production line according to claim 1, characterized in that: The side of the drying chamber (3) is provided with a slide rail (27), and the interior of the slide rail (27) is slidably connected to the slide rail (27) by the slider of the first conveyor belt (8).

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