A sealed roll based turbulent pickling system and method

Abstract

This invention relates to the field of cold rolling technology, specifically to a turbulent pickling system and method based on sealed rollers. The system includes: an overflow tank, a pickling tank fixedly connected to one side of the overflow tank, an overflow tank fixedly connected to one side of the pickling tank, and another overflow tank fixedly connected to one side of the overflow tank. This invention utilizes a circulation mechanism with multiple sets of circulation tanks, transport pipes, and circulation pipes working together. The circulation mechanism, along with the sealed overflow mechanism, maintains a balanced liquid level in each circulation tank, ensuring consistent flow rates for waste acid discharge, acid flow, and new acid injection, thus stabilizing the pickling process environment. The extrusion mechanism uses squeeze rollers to extrude the strip surface, effectively reducing the amount of acid trapped in the strip, minimizing acid waste, and reducing the load on subsequent rinsing processes, saving water resources. Furthermore, the synergistic effect of the extrusion mechanism and the sealed overflow mechanism further blocks reverse acid flow, helping to maintain stable acid concentration in each pickling tank and improving the pickling effect.

Description

Technical Field

[0001] This invention relates to the field of cold rolling technology, specifically to a turbulent pickling system and method based on sealed rollers. Background Technology

[0002] Pickling of strip steel is a key pre-process in the production of cold-rolled strip steel. Its core purpose is to remove the iron oxide scale on the surface of hot-rolled strip steel to provide a clean surface for subsequent cold rolling processing. With the continuous improvement of the steel industry's requirements for production efficiency and product quality, turbulent pickling technology, with its advantages of shallow tank structure and high turbulence intensity, has gradually replaced the traditional shallow tank pickling technology and become the mainstream process.

[0003] In existing turbulent pickling systems, the connection between the pickling tank and the overflow tank lacks an efficient sealing structure. During the traction and transportation of the strip steel, the acid is prone to overflowing along the surface of the strip steel towards the inlet side or adjacent tanks. Existing systems typically adopt a multi-tank series circulation mode, but there is a lack of precise liquid level control and dynamic flow regulation mechanism between the circulation tanks corresponding to each pickling tank. In existing pickling mechanisms, the nozzle arrangement and spray pressure of the acid spray beam lack targeted design, the turbulence intensity on the upper surface of the strip steel is insufficient, and the iron oxide scale in some areas is difficult to dissolve quickly, resulting in uneven pickling. Summary of the Invention

[0004] The purpose of this invention is to provide a turbulent pickling system and method based on a sealed roller. The aim is to design and solve the technical pain points of existing turbulent pickling systems, such as delayed acid replenishment, acid overflow, and limited pickling efficiency, by optimizing the sealed roller structure, innovating the transmission control method and liquid level closed-loop control logic. The goal is to achieve a highly efficient pickling method that accurately matches the positive flow rate of the acid, and simultaneously improves the pickling effect of the strip steel and the unit's production capacity.

[0005] To achieve the above effects, the technical solution adopted by the present invention is as follows: In a first aspect, the present invention provides a turbulent pickling system based on a sealing roller, comprising: an overflow trough one, an pickling tank one fixedly connected to one side of the overflow trough one, an overflow trough two fixedly connected to one side of the pickling tank one, an overflow trough two fixedly connected to one side of the overflow trough two, an overflow trough three fixedly connected to one side of the pickling tank two, an overflow trough three fixedly connected to one side of the overflow trough three, an overflow trough four fixedly connected to one side of the pickling tank three, a material inlet opened on one side of the overflow trough one and the overflow trough four, a sealing cover movably connected to the upper surface of the overflow trough one, the pickling tank one, the overflow trough two, the pickling tank two, the overflow trough three, the pickling tank three and the overflow trough four, and a circulation mechanism provided on one side of the overflow trough one; The circulation mechanism includes an acid circulation tank 1 on one side of the overflow tank, an acid circulation tank 2 on one side of the acid circulation tank 1, and an acid circulation tank 3 on one side of the acid circulation tank 2. A liquid level detector is fixedly connected to the upper surface of each of the acid circulation tanks 1, 2, and 3. A first transport pipe is fixedly connected to one side of the acid circulation tank 1, a second transport pipe is fixedly connected to one side of the acid circulation tank 1, a first circulation pipe is fixedly connected between the acid circulation tanks 1 and 2, a third transport pipe is fixedly connected to one side of the acid circulation tank 2, a second circulation pipe is fixedly connected between the acid circulation tanks 2 and 3, a fourth transport pipe is fixedly connected to one side of the acid circulation tank 2, a fifth transport pipe is fixedly connected to one side of the acid circulation tank 3, and a sixth transport pipe is fixedly connected to one side of the acid circulation tank 3.

[0006] Preferably, one side of the first transport pipe is connected to the interior of the first overflow trough, one side of the second transport pipe is connected to the interior of the second overflow trough, one side of the third transport pipe is connected to the interior of the second overflow trough, one side of the fourth transport pipe is connected to the interior of the third overflow trough, one side of the fifth transport pipe is connected to the interior of the third overflow trough, and one side of the sixth transport pipe is connected to the interior of the fourth overflow trough.

[0007] Preferably, each of the three pickling tanks (first, second, and third) is equipped with a pickling mechanism. The pickling mechanism includes a stone support plate fixedly connected inside the three pickling tanks. A water receiving hopper is fixedly connected to the upper surface of the stone support plate. Fixed rods are fixedly connected to the left and right sides inside the three pickling tanks. A spray beam is fixedly connected to one side of the fixed rod. Several high-pressure nozzles are fixedly connected to the lower surface of the spray beam.

[0008] Preferably, the overflow trough is provided with a sealing overflow mechanism. The sealing overflow mechanism includes a first partition plate fixedly connected to the inside of the overflow trough. A first mounting bracket is fixedly connected to the upper surface of the first partition plate. A pair of connecting rods are fixedly connected to the inside of the first mounting bracket. A first upper roller fixing plate is fixedly connected to the lower surface of the pair of connecting rods. A mounting partition plate is movably connected to the lower surface of the first upper roller fixing plate. A first lower roller fixing plate is fixedly connected to the lower surface of the mounting partition plate. A first rotating disk is movably connected to the inside of the first upper roller fixing plate. A first sealing roller is fixedly connected to one side of the first rotating disk. A second rotating disk is movably connected to the inside of the first lower roller fixing plate. A second sealing roller is fixedly connected to the first side of the second rotating disk.

[0009] Preferably, the overflow troughs 2 and 3 are internally provided with a sealing overflow mechanism 2. The sealing overflow mechanism 2 includes a second isolation plate fixedly connected inside the overflow troughs 2 and 3. A second mounting bracket is fixedly connected to the upper surface of the second isolation plate. A pair of guide buffer rods are movably connected to the left and right sides inside the second mounting bracket. An air pump is fixedly connected to the upper surface of the second mounting bracket. An air rod is fixedly connected to the lower surface of the air pump. A second upper roller fixing plate is fixedly connected to the lower surface of the air rod. A second lower roller fixing plate is fixedly connected inside the second mounting bracket. A third rotating disk is movably connected inside the second upper roller fixing plate. A third sealing roller is fixedly connected to one side of the third rotating disk. A fourth rotating disk is movably connected inside the second lower roller fixing plate. A fourth sealing roller is fixedly connected to one side of the fourth rotating disk.

[0010] Preferably, the overflow troughs 2, 3 and 4 are provided with a squeezing mechanism. The squeezing mechanism includes a connecting shaft fixedly connected inside the overflow troughs 2, 3 and 4, and a squeezing roller is fixedly connected to one side of the connecting shaft.

[0011] Preferably, a cleaning mechanism is provided on one side of the third and fourth rotating disks. The cleaning mechanism includes a first rotating rod movably connected inside the third and fourth rotating disks. A magnetic fluid sealing ring is fixedly connected to the outer wall of the first rotating rod. A first connecting plate is fixedly connected to the outer wall of the first rotating rod. A pair of support rods are fixedly connected to one side of the first connecting plate. A second rotating rod is provided above the first rotating rod. A spring-loaded pressure plate is fixedly connected to the outer wall of the second rotating rod. Two pairs of guide rods are fixedly connected to one side of the spring-loaded pressure plate. A first semi-circular gear is fixedly connected to the outer wall of the first rotating rod. A second semi-circular gear is fixedly connected to the outer wall of the second rotating rod. A fixed shaft is fixedly connected to one side of the second semi-circular gear. A scraper is fixedly connected to one side of the fixed shaft.

[0012] Preferably, the first and second semi-circular gears are meshed together.

[0013] Preferably, the upper surfaces of acid circulation tank 1, acid circulation tank 2, and acid circulation tank 3 are all provided with a circulation heating mechanism. The circulation heating mechanism includes a fixing frame fixedly connected to the upper surfaces of acid circulation tank 1, acid circulation tank 2, and acid circulation tank 3. A circulation heating pipe is fixedly connected to the upper surface of the fixing frame. A detachable sealing cover is movably connected to one side of the circulation heating pipe. A heating element is fixedly connected to one side of the detachable sealing cover. A connecting pipe is fixedly connected to one side of the circulation heating pipe. A diversion pipe is fixedly connected to one side of the connecting pipe. A water supply pipe is fixedly connected to one side of the circulation heating pipe.

[0014] Preferably, the output end of the diversion pipe is connected to the interior of the spray beam, and the output end of the water supply pipe is connected to the interior of acid circulation tank one, acid circulation tank two, and acid circulation tank three.

[0015] Secondly, the present invention provides a turbulent pickling method based on a sealing roller, the method comprising the following steps: Step 1: The strip steel enters the device through the feed port and passes through overflow tank 1, pickling tank 1, overflow tank 2, pickling tank 2, overflow tank 3, pickling tank 3 and overflow tank 4 in sequence to complete multi-stage continuous pickling; Step 2: Acid circulation tank 1, acid circulation tank 2, and acid circulation tank 3 are connected to the corresponding overflow tanks through transport pipes to receive the return acid after pickling. In the circulation heating mechanism, the heating element heats the acid through the circulation heating pipe, and then transports it to each pickling tank through the connecting pipe and the distribution pipe to ensure stable pickling temperature. The first circulation pipe and the second circulation pipe realize the forward flow of acid between the three circulation tanks. The liquid level detector monitors the liquid level in real time. Step 3: The strip steel is supported by a stone plate, which simultaneously enhances the turbulence intensity of the acid solution on the lower surface of the strip steel. The water collection bucket collects the sprayed acid solution to avoid localized liquid accumulation. The fixed rod-mounted spray beam sprays high-pressure acid solution onto the upper surface of the strip steel through several high-pressure nozzles, forming strong turbulence, breaking the diffusion boundary layer on the surface of the strip steel, and accelerating the dissolution of iron oxide scale. Multiple pickling tanks are connected in series, and the strip steel passes through pickling tank 1, pickling tank 2, and pickling tank 3 in sequence. The acid solution concentration is distributed in a gradient from high to low, so that the iron oxide scale is gradually removed. Step 4: The first and second sealing rollers in overflow trough 1 rotate and adhere to the surface of the strip steel to prevent acid from overflowing from pickling tank 1 to the material outlet side. The third and fourth sealing rollers in overflow trough 2 and overflow trough 3 are raised and lowered by an air pump. By adjusting the gap between the rollers, acid overflow is prevented from overflowing in the reverse direction, while some acid can flow into the overflow trough through the gap and then flow back to the corresponding circulation tank through the transport pipe to replenish the acid loss. The magnetic fluid sealing ring ensures the sealing performance of the rotating rod, and the scraper can clean the acid residue attached to the surface of the sealing roller to avoid affecting the sealing effect. Step 5: The squeeze rollers in overflow tanks 2, 3, and 4 are fixed by connecting shafts. When the strip passes through, the squeeze rollers squeeze the surface of the strip, reducing the amount of acid carried into the next process. The squeeze rollers work in conjunction with the sealing overflow mechanism to reduce the risk of acid backflow, ensure the stability of acid concentration in each pickling tank, and reduce acid waste.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The sealing overflow mechanism, through the contact of the upper and lower sealing rollers, precisely prevents the acid inside the pickling tank from overflowing along the strip surface towards the inlet side, avoiding acid waste and corrosion around the equipment, thus reducing environmental risks. The flexible cooperation between the rotating disc and the sealing rollers ensures smooth strip transport while maintaining stable sealing performance, without affecting unit operating efficiency. The sealing overflow mechanism, driven by an air pump, adjusts the gap between the sealing rollers, replenishing the positive flow rate of the acid and resolving issues caused by reverse acid carryover from the squeeze rollers and obstructed connecting pipes leading to delayed acid replenishment. Furthermore, the guide buffer rod reduces impact during adjustment, protecting the sealing rollers and strip surface and preventing scratches. The pickling mechanism, with its support plate enhancing turbulence on the lower surface of the strip and high-pressure nozzles spraying acid onto the upper surface, works in tandem to improve turbulence, accelerating the dissolution of iron oxide scale and significantly improving pickling uniformity. Multiple high-pressure nozzles are arranged along the width of the strip, ensuring comprehensive coverage and preventing incomplete pickling in certain areas, thus reducing subsequent rework.

[0017] By employing multiple sets of circulation tanks and transport pipes, along with the circulation mechanism and the sealing overflow mechanism, the liquid level in each circulation tank is maintained in balance. This ensures consistent flow rates for waste acid discharge, acid circulation, and new acid injection, stabilizing the pickling process environment. The extrusion mechanism, with its squeeze rollers pressing the strip surface, effectively reduces the amount of acid trapped in the strip, minimizing acid waste and reducing the load on subsequent rinsing processes, thus saving water resources. Furthermore, the combined action of the extrusion mechanism and the sealing overflow mechanism further prevents reverse acid flow, helping to maintain stable acid concentrations in each pickling tank and improving the pickling effect.

[0018] The cleaning mechanism works by rotating the sealing roller as the strip passes over it. This rotation drives the first and second semi-circular gears to rotate as well. The scraper rotates synchronously with the sealing roller through gear meshing, while the sealing roller rotates in the opposite direction, causing the first and second semi-circular gears to mesh in opposite directions. This allows the scraper to remove acid residue and iron oxide scale from the surface of the sealing roller, preventing impurities from accumulating and affecting the sealing effect, and reducing the risk of acid leakage. The circulating heating mechanism uses heating elements to stably heat the acid to the optimal pickling temperature through circulating heating pipes. The distribution pipes precisely deliver the constant-temperature acid to the corresponding spray beams in the pickling tank, ensuring consistent acid temperature in all areas and preventing uneven pickling due to temperature fluctuations. Multiple water pipes enable acid circulation and return, maintaining continuous operation of the heating system. In conjunction with the circulation mechanism, this ensures constant acid temperature and flow, improving pickling effect and production efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the main structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the circulation mechanism structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the pickling mechanism in an embodiment of the present invention; Figure 4 This is a schematic diagram of a sealing overflow structure according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the sealing overflow structure according to an embodiment of the present invention; Figure 6 This is a schematic diagram of a portion of the cleaning mechanism structure according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the overall structure of the cleaning mechanism according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the circulating heating mechanism structure according to an embodiment of the present invention.

[0021] In the diagram, 1. Overflow tank 1; 2. Pickling tank 1; 3. Overflow tank 2; 4. Pickling tank 2; 5. Overflow tank 3; 6. Pickling tank 3; 7. Overflow tank 4; 8. Inlet; 9. Sealing cap; 10. Acid circulation tank 1; 11. Acid circulation tank 2; 12. Acid circulation tank 3; 13. Level detector; 14. First transport pipe; 15. Second transport pipe; 16. First circulation pipe; 17. Third transport pipe; 18. Second circulation pipe. 19. Ring pipe; 20. Fourth transport pipe; 21. Fifth transport pipe; 22. Sixth transport pipe; 23. Stone support plate; 24. Water receiving hopper; 25. Fixing rod; 26. Spray beam; 27. High-pressure nozzle; 28. First isolation plate; 29. ​​First mounting bracket; 30. Connecting rod; 31. First upper roller fixing plate; 32. Mounting partition plate; 33. First lower roller fixing plate; 34. First rotating disk; 35. First sealing roller; 36. Second... 36. Rotating disk; 37. Second sealing roller; 38. Connecting shaft; 39. Squeezing roller; 40. Second isolation plate; 41. Second mounting bracket; 42. Guide buffer rod; 43. Air pump; 44. Air rod; 45. Second upper roller fixing plate; 46. Second lower roller fixing plate; 47. Third rotating disk; 48. Third sealing roller; 49. Fourth rotating disk; 50. First rotating rod; 51. Magnetohydrodynamic sealing ring; 52. First connecting disk; 53. Support rod; 54. Second rotating rod; 55. Spring clamping disk; 56. Guide rod; 57. First semi-circular gear; 58. Second semi-circular gear; 59. Fixed shaft; 60. Scraper; 700. Circulating heating mechanism; 701. Fixing bracket; 702. Circulating heating tube; 703. Removable sealing cover; 704. Heating element; 705. Connecting pipe; 706. Diverter pipe; 707. Water supply pipe. Detailed Implementation

[0022] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0023] Example 1: Please see Figures 1 to 8 As shown, this embodiment discloses a turbulent pickling system based on a sealing roller, including: an overflow tank 1, a pickling tank 2 fixedly connected to one side of the overflow tank 1, an overflow tank 3 fixedly connected to one side of the pickling tank 2, a pickling tank 4 fixedly connected to one side of the overflow tank 3, an overflow tank 5 fixedly connected to one side of the pickling tank 4, a pickling tank 6 fixedly connected to one side of the overflow tank 5, and an overflow tank 7 fixedly connected to one side of the pickling tank 6. A feed port 8 is provided on one side of the overflow tank 1 and the overflow tank 7. A sealing cover 9 is movably connected to the upper surface of the overflow tank 1, the pickling tank 2, the overflow tank 3, the pickling tank 4, the overflow tank 5, the pickling tank 6, and the overflow tank 7. A circulation mechanism is provided on one side of the overflow tank 1. Furthermore, the circulation mechanism includes an acid circulation tank 10, an acid circulation tank 21, an acid circulation tank 32, a level detector 13, a first transport pipe 14, a second transport pipe 15, a first circulation pipe 16, a third transport pipe 17, a second circulation pipe 18, a fourth transport pipe 19, a fifth transport pipe 20, and a sixth transport pipe 21. The acid circulation tank 10 is located on one side of the overflow tank 1. The acid circulation tank 21 is located on one side of the acid circulation tank 10, and the acid circulation tank 32 is located on one side of the acid circulation tank 21. Level detectors 13 are fixedly connected to the upper surfaces of the acid circulation tanks 10, 21, and 32. The first transport pipe 14 is fixedly connected to one side of the acid circulation tank 10, and the second transport pipe 15 is fixedly connected to one side of the acid circulation tank 10. The middle sections of the acid circulation tanks 10 and 21... A first circulation pipe 16 is fixedly connected between the two acid circulation tanks. A third transport pipe 17 is fixedly connected to one side of the acid circulation tank 11. A second circulation pipe 18 is fixedly connected between the acid circulation tank 11 and the acid circulation tank 12. A fourth transport pipe 19 is fixedly connected to one side of the acid circulation tank 11. A fifth transport pipe 20 is fixedly connected to one side of the acid circulation tank 12. A sixth transport pipe 21 is fixedly connected to one side of the acid circulation tank 12. One side of the first transport pipe 14 is connected to the interior of the overflow tank 1. One side of the second transport pipe 15 is connected to the interior of the overflow tank 2. One side of the third transport pipe 17 is connected to the interior of the overflow tank 2. One side of the fourth transport pipe 19 is connected to one side of the overflow tank 3. One side of the fifth transport pipe 20 is connected to the interior of the overflow tank 3. One side of the sixth transport pipe 21 is connected to the interior of the overflow tank 4. It should be understood that before starting, acid is injected into each pickling tank 1 2, pickling tank 2 4 and pickling tank 3 6. After the acid overflows, it overflows into the corresponding overflow tank 1 1, overflow tank 2 3, overflow tank 3 5 and overflow tank 4 7. The acid in the acid circulation tank 3 12 flows into the acid circulation tank 2 11 through the second circulation pipe 18. The acid in the acid circulation tank 2 then flows into the acid circulation tank 1 10 through the first circulation pipe 16 until the liquid level of the three circulation tanks reaches the preset standard. The acid in the three circulation tanks is then sent back to the spray beam 25 of the pickling tank 1 2, pickling tank 2 4 and pickling tank 3 6 through the circulation heating mechanism 700.

[0024] Furthermore, pickling tank 1 (2), pickling tank 2 (4), and pickling tank 3 (6) are all equipped with pickling mechanisms. The pickling mechanism includes a stone support plate 22, a water receiving hopper 23, a fixing rod 24, a spray beam 25, and a high-pressure nozzle 26. The stone support plate 22 is fixedly connected inside the pickling tank 1 (2), pickling tank 2 (4), and pickling tank 3 (6). The water receiving hopper 23 is fixedly connected to the upper surface of the stone support plate 22. The fixing rod 24 is fixedly connected to the left and right sides inside the pickling tank 1 (2), pickling tank 2 (4), and pickling tank 3 (6). The spray beam 25 is fixedly connected to one side of the fixing rod 24. Several high-pressure nozzles 26 are fixedly connected to the lower surface of the spray beam 25. In a preferred embodiment of the present invention, the circulating heating mechanism 700 heats the acid solution to the optimal pickling temperature and delivers it to the spray beams 25 of each pickling tank via the diversion pipe 706, filling the spray beams 25 and the high-pressure nozzles 26 channels, and removing residual air. The support plate 22 is pre-fixed inside pickling tank 1 2, pickling tank 2 4, and pickling tank 3 6 to support the water receiving hopper 23, ensuring that the water receiving hopper 23 is stably arranged along the width direction of the strip and precisely aligned with the strip's running trajectory. Furthermore, the strip is stably conveyed to pickling tank 1 2 through the material inlet 8 and the overflow trough P11. Under the action of the feeding mechanism, the acid solution inside pickling tank 1 2, pickling tank 2 4 and pickling tank 3 6 is fully in contact, thus preparing for pickling. The fixing rods 24 on both sides inside pickling tank 1 2, pickling tank 2 4 and pickling tank 3 6 firmly support the spray beam 25, so that the spray beam 25 maintains a constant distance from the upper surface of the strip. The high-pressure nozzles 26 are evenly distributed along the length of the spray beam 25, covering the full width of the strip, and spraying the constant temperature acid solution into the upper surface of the strip in the form of a high-pressure fan-shaped jet, forming a strong impact turbulence, breaking the diffusion boundary layer between the iron oxide scale and the surface of the strip, and accelerating the reaction and dissolution.

[0025] Furthermore, each overflow trough 1 is internally equipped with a sealing overflow mechanism, which includes a first isolation plate 27, a first mounting bracket 28, a connecting rod 29, a first upper roller fixing plate 30, a mounting partition 31, a first lower roller fixing plate 32, a first rotating disk 33, a first sealing roller 34, a second rotating disk 35, and a second sealing roller 36. The first isolation plate 27 is fixedly connected inside the overflow trough 1, and the first mounting bracket 28 is fixedly connected to the upper surface of the first isolation plate 27. A pair of connecting rods are fixedly connected inside the first mounting bracket 28. A pair of connecting rods 29 are fixedly connected to a first upper roller fixing plate 30 on their lower surfaces. A mounting partition 31 is movably connected to the lower surface of the first upper roller fixing plate 30. A first lower roller fixing plate 32 is fixedly connected to the lower surface of the mounting partition 31. A first rotating disk 33 is movably connected inside the first upper roller fixing plate 30. A first sealing roller 34 is fixedly connected to one side of the first rotating disk 33. A second rotating disk 35 is movably connected inside the first lower roller fixing plate 32. A second sealing roller 36 is fixedly connected to the first rotating disk 35. In a preferred embodiment of the present invention, the first partition plate 27 in the overflow trough 1 is pre-fixed to provide a stable installation for the first mounting frame 28. The first mounting frame 28 is fixedly connected to the first upper roller fixing plate 30 via a pair of connecting rods 29. The mounting partition plate 31 is movably connected between the first upper roller fixing plate 30 and the first lower roller fixing plate 32, and the gap between the upper and lower rollers can be finely adjusted according to the strip thickness to adapt to the sealing requirements of different specifications of strips. The first rotating disk 33 is embedded inside the first upper roller fixing plate 30, and the second rotating disk 35 is embedded inside the first lower roller fixing plate 32 to ensure flexible rotation without jamming. After the first sealing roller 34 and the second sealing roller 36 are fixed to the rotating disks respectively, they form an upper and lower opposing sealing structure. The gap is adjusted to match the thickness of the strip to be processed, and the strip enters the overflow trough through the feed port 8. After passing through the gap between the first sealing roller 34 and the second sealing roller 36, the acid solution in the pickling tank 2 is conveyed to the overflow tank 1 due to the full flow effect. When the acid solution attempts to overflow from the surface of the strip to the inlet side, the first sealing roller 34 and the second sealing roller 36, which are positioned vertically, form a physical barrier to directly block the flow path of the acid solution. During the conveying process of the strip, its surface makes slight contact with the sealing roller, which drives the first rotating disk 33 and the second rotating disk 35 to rotate synchronously, so that the sealing roller dynamically fits with the strip, ensuring the sealing effect and avoiding static friction scratching the surface of the strip. At the same time, it reduces the wear of the sealing roller itself. The acid solution blocked by the sealing roller cannot overflow to the inlet side and can only collect in the overflow tank 1. Then, it flows back to the acid solution circulation tank 10 through the first transport pipe 14 to realize the recycling of acid solution.

[0026] Furthermore, the overflow troughs 2 and 3 are internally equipped with a sealing overflow mechanism, which includes a second isolation plate 39, a second mounting bracket 40, a guide buffer rod 41, an air pump 42, an air rod 43, a second upper roller fixing plate 44, a second lower roller fixing plate 45, a third rotating disk 46, a third sealing roller 47, a fourth rotating disk 48, and a fourth sealing roller 49. The second isolation plate 39 is fixedly connected inside the overflow troughs 2 and 3, and the second mounting bracket 40 is fixedly connected to the upper surface of the second isolation plate 39. The left and right sides of the second mounting bracket 40 are movably connected inside. There is a pair of guide buffer rods 41. An air pump 42 is fixedly connected to the upper surface of the second mounting bracket 40. An air rod 43 is fixedly connected to the lower surface of the air pump 42. A second upper roller fixing plate 44 is fixedly connected to the lower surface of the air rod 43. A second lower roller fixing plate 45 is fixedly connected inside the second mounting bracket 40. A third rotating disk 46 is movably connected inside the second upper roller fixing plate 44. A third sealing roller 47 is fixedly connected to one side of the third rotating disk 46. A fourth rotating disk 48 is movably connected inside the second lower roller fixing plate 45. A fourth sealing roller 49 is fixedly connected to one side of the fourth rotating disk 48. In a preferred embodiment of the present invention, the second isolation plate 39 in the overflow trough 2 3 and overflow trough 3 5 is fixed in place, providing a stable installation reference for the second mounting frame 40. The guide buffer rods 41 on the left and right sides of the second mounting frame 40 are assembled, and their movable connection structure can extend and retract in the vertical direction, providing guidance and buffering for subsequent adjustment of the sealing roller height. Moreover, the third rotating disk 46 is embedded in the second upper roller fixing plate 44, and the fourth rotating disk 48 is embedded in the second lower roller fixing plate 45, ensuring smooth rotation without jamming. After the third sealing roller 47 and the fourth sealing roller 49 are fixed to the rotating disks respectively, the initial distance is preset according to the strip thickness. The air pump 42 is started, driving the air rod 43 to extend and retract. The air rod 43 drives the second upper roller fixing plate 44 to rise and fall vertically along the guide buffer rod 41, adjusting the distance between the third sealing roller 47 and the fourth sealing roller 49.

[0027] Furthermore, the overflow trough 2 3, overflow trough 3 5 and overflow trough 4 7 are provided with a squeezing mechanism. The squeezing mechanism includes a connecting shaft 37 and a squeezing roller 38. The connecting shaft 37 is fixedly connected inside the overflow trough 2 3, overflow trough 3 5 and overflow trough 4 7, and the squeezing roller 38 is fixedly connected to one side of the connecting shaft 37. In a preferred embodiment of the present invention, after the strip steel completes the pre-pickled process, it sequentially enters overflow trough 2 3, overflow trough 3 5, and overflow trough 4 7, passing through the gap between the upper and lower squeeze rollers 38. During the conveying process, the surface of the strip steel is in close contact with the squeeze rollers 38. Under the action of the strip steel traction force, the squeeze rollers 38 rotate synchronously with the strip steel. Through the pressure between the roller body and the surface of the strip steel, the acid liquid attached to the upper and lower surfaces of the strip steel is efficiently squeezed, causing the acid liquid to detach from the surface of the strip steel. The squeezed acid liquid flows along the surface of the squeeze rollers 38 to the bottom of the overflow trough, where it collects with other acid liquid in the overflow trough. Then, it flows back to acid liquid circulation tank 1 10, acid liquid circulation tank 2 11, and acid liquid circulation tank 3 12 through the second transport pipe 15, the third transport pipe 17, and the sixth transport pipe 21, realizing the recycling and reuse of acid liquid.

[0028] Furthermore, a cleaning mechanism is provided on one side of the third rotating disk 46 and the fourth rotating disk 48. The cleaning mechanism includes a first rotating rod 50, a magnetic fluid sealing ring 51, a first connecting disk 52, a support rod 53, a second rotating rod 54, a spring-loaded pressure plate 55, a guide rod 56, a first semi-circular gear 57, a second semi-circular gear 58, a fixed shaft 59, and a scraper 60. The first rotating rod 50 is movably connected inside the third rotating disk 46 and the fourth rotating disk 48. The magnetic fluid sealing ring 51 is fixedly connected to the outer wall of the first rotating rod 50, and the first connecting disk 52 is fixedly connected to the outer wall of the first rotating rod 50. A pair of support rods 53 are fixedly connected to one side of the receiving plate 52. A second rotating rod 54 is provided above the first rotating rod 50. A spring pressure plate 55 is fixedly connected to the outer wall of the second rotating rod 54. Two pairs of guide rods 56 are fixedly connected to one side of the spring pressure plate 55. A first semi-circular gear 57 is fixedly connected to the outer wall of the first rotating rod 50. A second semi-circular gear 58 is fixedly connected to the outer wall of the second rotating rod 54. A fixed shaft 59 is fixedly connected to one side of the second semi-circular gear 58. A scraper 60 is fixedly connected to one side of the fixed shaft 59. The first semi-circular gear 57 and the second semi-circular gear 58 are meshed with each other. In a preferred embodiment of the present invention, the first rotating rod 50 passes through the axial holes of the third rotating disk 46 and the fourth rotating disk 48. The rotating rod and the rotating disk are dynamically sealed by the magnetic fluid sealing ring 51 to prevent acid from seeping into the connection gap and corroding the internal parts. When the strip steel drives the third sealing roller 47 and the fourth sealing roller 49 to rotate, the sealing roller drives the third rotating disk 46 and the fourth rotating disk 48 to rotate synchronously. The third rotating disk 46 and the fourth rotating disk 48 drive the first rotating rod 50 to rotate through the support rod 53 and the first connecting disk 52. The first semi-circular gear 57 on the first rotating rod 50 drives the meshing second semi-circular gear 58 to rotate, thereby driving the second rotating rod 54 to rotate synchronously. The second rotating rod 54 drives the scraper 60 to make a circular motion through the fixed shaft 59. The movement trajectory of the scraper 60 is in contact with the surface of the third sealing roller 47 and the fourth sealing roller 49, thereby cleaning the acid on the surface of the third sealing roller 47 and the fourth sealing roller 49.

[0029] Furthermore, the upper surfaces of acid circulation tank 10, acid circulation tank 21, and acid circulation tank 312 are all equipped with a circulation heating mechanism 700. The circulation heating mechanism 700 includes a fixing frame 701, a circulation heating pipe 702, a removable sealing cover 703, a heating element 704, a connecting pipe 705, a diversion pipe 706, and a water supply pipe 707. The fixing frame 701 is fixedly connected to the upper surface of acid circulation tank 10, acid circulation tank 21, and acid circulation tank 312, and the circulation heating pipe 702 is fixedly connected to the upper surface of the fixing frame 701. A removable sealing cover 703 is movably connected to one side of the heat pipe 702. A heating element 704 is fixedly connected to one side of the removable sealing cover 703. A connecting pipe 705 is fixedly connected to one side of the circulating heating pipe 702. A diversion pipe 706 is fixedly connected to one side of the connecting pipe 705. A water supply pipe 707 is fixedly connected to one side of the circulating heating pipe 702. The output end of the diversion pipe 706 is interconnected with the interior of the spray beam 25. The output end of the water supply pipe 707 is interconnected with the interior of acid circulation tank 10, acid circulation tank 21, and acid circulation tank 32. In a preferred embodiment of the present invention, the fixing frame 701 is pre-fixed on the upper surface of acid circulation tank 10, acid circulation tank 21, and acid circulation tank 312 to provide stable support for the circulating heating tube 702. A removable sealing cover 703 is installed on one side of the circulating heating tube 702, with its fixed heating element 704 embedded inside the heating tube. The sealing cover simultaneously seals the heating tube, prevents acid leakage and heat loss, and facilitates subsequent maintenance and replacement of the heating element 704. One end of the connecting pipe 705 is fixed to the circulating heating tube 702, and the other end is connected to the diversion pipe 706. The output end of the diversion pipe 706 is precisely connected to the spray beam 25 of each pickling tank. The water supply pipe 707 is connected at one end to the circulating heating pipe 702, and the other end extends into the acid circulation tank 10, acid circulation tank 21, and acid circulation tank 32. The heating element 704 is powered on and starts to heat the acid in the circulating heating pipe 702 through heat conduction. The heated constant temperature acid flows into the distribution pipe 706 through the connecting pipe 705. The distribution pipe 706 distributes the constant temperature acid evenly to the spray beams 25 of acid pickling tank 12, acid pickling tank 24, and acid pickling tank 36 according to the acid demand of each pickling tank. After the acid enters the spray beams 25, it is sprayed onto the surface of the strip steel through the high pressure nozzle 26 to provide acid with a stable temperature for the pickling reaction.

[0030] A turbulent pickling method based on a sealed roller includes: Step 1: The strip steel enters the device through the feed port 8 and passes through overflow tank 1, pickling tank 2, overflow tank 3, pickling tank 4, overflow tank 5, pickling tank 6 and overflow tank 7 in sequence to complete multi-stage continuous pickling. Step 2: Acid circulation tank 10, acid circulation tank 21, and acid circulation tank 312 are connected to the corresponding overflow tanks through transport pipes to receive the reflux acid after pickling. In the circulation heating mechanism 700, the heating element 704 heats the acid through the circulation heating pipe 702, and then transports it to each pickling tank through the connecting pipe 705 and the diversion pipe 706 to ensure stable pickling temperature. The first circulation pipe 16 and the second circulation pipe 18 realize the forward flow of acid between the three circulation tanks. The liquid level detector 13 monitors the liquid level in real time. Step 3: The support plate 22 supports the strip steel and enhances the turbulence intensity of the acid solution on the lower surface of the strip steel. The water collection bucket 23 collects the sprayed acid solution to avoid local liquid accumulation. The spray beam 25, fixed by the fixing rod 24, sprays high-pressure acid solution onto the upper surface of the strip steel through several high-pressure nozzles 26, forming strong turbulence, breaking the diffusion boundary layer on the surface of the strip steel, and accelerating the dissolution of iron oxide scale. Multiple pickling tanks are connected in series. The strip steel passes through pickling tank 1 2, pickling tank 2 4, and pickling tank 3 6 in sequence. The acid solution concentration is distributed in a gradient from high to low, so that the iron oxide scale is gradually removed. Step 4: The first sealing roller 34 and the second sealing roller 36 in overflow trough 1 rotate and adhere to the surface of the strip steel to prevent the acid in pickling tank 2 from overflowing to the feed port 8. The third sealing roller 47 in overflow trough 2 and overflow trough 3 and the fourth sealing roller 49 are raised and lowered by the air pump 42. By adjusting the gap between the rollers, the acid is prevented from overflowing in reverse, and some acid can flow into the overflow trough through the gap and then flow back to the corresponding circulation tank through the transport pipe to replenish the acid loss. The magnetic fluid sealing ring 51 ensures the sealing performance of the rotating rod, and the scraper 60 can clean the acid residue attached to the surface of the sealing roller to avoid affecting the sealing effect. Step 5: The squeezing rollers 38 in overflow tank 2 (3), overflow tank 3 (5), and overflow tank 4 (7) are fixed by the connecting shaft 37. When the strip passes through, the squeezing rollers 38 squeeze the surface of the strip to reduce the amount of acid carried into the next process. The squeezing rollers 38 cooperate with the sealing overflow mechanism to reduce the risk of acid backflow, ensure the stability of acid concentration in each pickling tank, and reduce acid waste.

[0031] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0032] This invention is not limited to the optional embodiments described above, and anyone can derive other various forms of products based on the inspiration of this invention. The specific embodiments described above should not be construed as limiting the scope of protection of this invention; the scope of protection of this invention should be determined by the claims, and the specification can be used to interpret the claims.

Claims

1. A turbulent pickling system based on a sealed roller, comprising: Overflow tank one (1), characterized in that, one side of the overflow tank one (1) is fixedly connected to pickling tank one (2), one side of the pickling tank one (2) is fixedly connected to overflow tank two (3), one side of the overflow tank two (3) is fixedly connected to pickling tank two (4), one side of the pickling tank two (4) is fixedly connected to overflow tank three (5), one side of the overflow tank three (5) is fixedly connected to pickling tank three (6), and one side of the pickling tank three (6) is fixedly connected to... An overflow trough four (7) is fixedly connected. A material port (8) is opened on one side of the overflow trough one (1) and the overflow trough four (7). A sealing cover (9) is movably connected to the upper surface of the overflow trough one (1), pickling tank one (2), overflow trough two (3), pickling tank two (4), overflow trough three (5), pickling tank three (6) and overflow trough four (7). A pickling mechanism is provided inside the pickling tank one (2), pickling tank two (4) and pickling tank three (6). The pickling mechanism includes a stone support plate (22) fixedly connected inside the pickling tank 1 (2), pickling tank 2 (4) and pickling tank 3 (6). A water receiving hopper (23) is fixedly connected to the upper surface of the stone support plate (22). Fixing rods (24) are fixedly connected to the left and right sides inside the pickling tank 1 (2), pickling tank 2 (4) and pickling tank 3 (6). A spray beam (25) is fixedly connected to one side of the fixing rod (24). Several high-pressure nozzles (26) are fixedly connected to the lower surface of the spray beam (25).

2. The turbulent pickling system based on a sealing roller according to claim 1, characterized in that: A circulation mechanism is provided on one side of the overflow tank (1). The circulation mechanism includes an acid circulation tank (10) on one side of the overflow tank (1), an acid circulation tank (21) on one side of the acid circulation tank (10), and an acid circulation tank (32) on one side of the acid circulation tank (21). A liquid level detector (13) is fixedly connected to the upper surface of the acid circulation tank (10), the acid circulation tank (21), and the acid circulation tank (32). A first transport pipe (14) is fixedly connected to one side of the acid circulation tank (10). The second transport pipe (15) is fixedly connected to the middle of the acid circulation tank one (10) and the acid circulation tank two (11), the third transport pipe (17) is fixedly connected to one side of the acid circulation tank two (11), the second transport pipe (18) is fixedly connected to the middle of the acid circulation tank two (11) and the acid circulation tank three (12), the fourth transport pipe (19) is fixedly connected to one side of the acid circulation tank two (11), the fifth transport pipe (20) is fixedly connected to one side of the acid circulation tank three (12), and the sixth transport pipe (21) is fixedly connected to one side of the acid circulation tank three (12).

3. The turbulent pickling system based on a sealing roller according to claim 2, characterized in that: One side of the first transport pipe (14) is connected to the interior of overflow trough one (1), one side of the second transport pipe (15) is connected to the interior of overflow trough two (3), one side of the third transport pipe (17) is connected to the interior of overflow trough two (3), one side of the fourth transport pipe (19) is connected to the interior of overflow trough three (5), one side of the fifth transport pipe (20) is connected to the interior of overflow trough three (5), and one side of the sixth transport pipe (21) is connected to the interior of overflow trough four (7).

4. The turbulent pickling system based on a sealing roller according to claim 1, characterized in that: The overflow trough (1) is provided with a sealing overflow mechanism. The sealing overflow mechanism includes a first isolation plate (27) fixedly connected inside the overflow trough (1). A first mounting bracket (28) is fixedly connected to the upper surface of the first isolation plate (27). A pair of connecting rods (29) are fixedly connected inside the first mounting bracket (28). A first upper roller fixing plate (30) is fixedly connected to the lower surface of the pair of connecting rods (29). An installation partition plate (31) is movably connected to the lower surface of the first upper roller fixing plate (30). A first lower roller fixing plate (32) is fixedly connected to the lower surface of the installation partition plate (31). A first rotating disk (33) is movably connected inside the first upper roller fixing plate (30). A first sealing roller (34) is fixedly connected to one side of the first rotating disk (33). A second rotating disk (35) is movably connected to the inside of the first lower roller fixing plate (32). A second sealing roller (36) is fixedly connected to one side of the second rotating disk (35).

5. The turbulent pickling system based on a sealing roller according to claim 1, characterized in that: The overflow trough 2 (3) and overflow trough 3 (5) are equipped with a sealing overflow mechanism. The sealing overflow mechanism includes a second isolation plate (39) fixedly connected inside the overflow trough 2 (3) and overflow trough 3 (5). A second mounting bracket (40) is fixedly connected to the upper surface of the second isolation plate (39). A pair of guide buffer rods (41) are movably connected to the left and right sides inside the second mounting bracket (40). An air pump (42) is fixedly connected to the upper surface of the second mounting bracket (40). An air pump (42) is fixedly connected to the lower surface of the air pump (42). The lower surface of the air rod (43) is fixedly connected to a second upper roller fixing plate (44), the interior of the second mounting bracket (40) is fixedly connected to a second lower roller fixing plate (45), the interior of the second upper roller fixing plate (44) is movably connected to a third rotating disk (46), one side of the third rotating disk (46) is fixedly connected to a third sealing roller (47), the interior of the second lower roller fixing plate (45) is movably connected to a fourth rotating disk (48), one side of the fourth rotating disk (48) is fixedly connected to a fourth sealing roller (49).

6. The turbulent pickling system based on a sealing roller according to claim 1, characterized in that: The overflow trough 2 (3), overflow trough 3 (5) and overflow trough 4 (7) are provided with a squeezing mechanism. The squeezing mechanism includes a connecting shaft (37) fixedly connected inside the overflow trough 2 (3), overflow trough 3 (5) and overflow trough 4 (7). A squeezing roller (38) is fixedly connected to one side of the connecting shaft (37).

7. The turbulent pickling system based on a sealing roller according to claim 5, characterized in that: A cleaning mechanism is provided on one side of the third rotating disk (46) and the fourth rotating disk (48). The cleaning mechanism includes a first rotating rod (50) movably connected inside the third rotating disk (46) and the fourth rotating disk (48). A magnetic fluid sealing ring (51) is fixedly connected to the outer wall of the first rotating rod (50). A first connecting disk (52) is fixedly connected to the outer wall of the first rotating rod (50). A pair of support rods (53) are fixedly connected to one side of the first connecting disk (52). A cleaning mechanism is provided above the first rotating rod (50). A second rotating rod (54) is provided, and a spring pressure plate (55) is fixedly connected to the outer wall of the second rotating rod (54). Two pairs of guide rods (56) are fixedly connected to one side of the spring pressure plate (55). A first semi-circular gear (57) is fixedly connected to the outer wall of the first rotating rod (50). A second semi-circular gear (58) is fixedly connected to the outer wall of the second rotating rod (54). A fixed shaft (59) is fixedly connected to one side of the second semi-circular gear (58). A scraper (60) is fixedly connected to one side of the fixed shaft (59).

8. The turbulent pickling system based on a sealing roller according to claim 2, characterized in that: The upper surfaces of the acid circulation tank 1 (10), acid circulation tank 2 (11) and acid circulation tank 3 (12) are all provided with a circulation heating mechanism (700). The circulation heating mechanism (700) includes a fixing frame (701) fixedly connected to the upper surfaces of the acid circulation tank 1 (10), acid circulation tank 2 (11) and acid circulation tank 3 (12). A circulation heating pipe (702) is fixedly connected to the upper surface of the fixing frame (701). A detachable sealing cover (703) is movably connected to one side of the circulation heating pipe (702). A heating element (704) is fixedly connected to one side of the detachable sealing cover (703). A connecting pipe (705) is fixedly connected to one side of the circulation heating pipe (702). A diversion pipe (706) is fixedly connected to one side of the connecting pipe (705). A water supply pipe (707) is fixedly connected to one side of the circulation heating pipe (702).

9. A turbulent pickling method based on a sealed roller, applied to the turbulent pickling system based on a sealed roller as described in any one of claims 1-8, characterized in that, The method includes the following steps: Step 1: The strip steel enters the system through the feed port (8) and passes through overflow tank 1 (1), pickling tank 1 (2), overflow tank 2 (3), pickling tank 2 (4), overflow tank 3 (5), pickling tank 3 (6) and overflow tank 4 (7) in sequence to complete multi-stage continuous pickling; Step 2: Acid circulation tank 1 (10), acid circulation tank 2 (11), and acid circulation tank 3 (12) are connected to the corresponding overflow tanks through transport pipes to receive the reflux acid after pickling. In the circulation heating mechanism (700), the heating element (704) heats the acid through the circulation heating pipe (702) and then transports it to each pickling tank through the connecting pipe (705) and the diversion pipe (706). The first circulation pipe (16) and the second circulation pipe (18) realize the positive flow of acid between the three circulation tanks. The liquid level detector (13) monitors the liquid level in real time. Step 3: The support plate (22) supports the strip steel and enhances the acid turbulence intensity on the lower surface of the strip steel. The water collection bucket (23) collects the sprayed acid. The fixed rod (24) fixes the spray beam (25) through several high-pressure nozzles (26) to spray high-pressure acid onto the upper surface of the strip steel, forming strong turbulence, breaking the diffusion boundary layer on the surface of the strip steel, and accelerating the dissolution of iron oxide scale. Multiple pickling tanks are connected in series. The strip steel passes through pickling tank one (2), pickling tank two (4), and pickling tank three (6) in sequence. The acid concentration is distributed in a gradient from high to low, so that the iron oxide scale is gradually removed. Step 4: The first sealing roller (34) and the second sealing roller (36) in the overflow tank 1 (1) rotate to adhere to the surface of the strip steel, preventing the acid liquid in the pickling tank 1 (2) from overflowing to the material port (8). The third sealing roller (47) and the fourth sealing roller (49) in the overflow tank 2 (3) and the overflow tank 3 (5) are raised and lowered by the air pump (42) so that some acid liquid flows into the overflow tank through the gap and then flows back to the corresponding circulation tank through the transport pipe to replenish the acid liquid loss. Step 5: The squeezing rollers (38) in overflow trough 2 (3), overflow trough 3 (5), and overflow trough 4 (7) are fixed by the connecting shaft (37). When the strip passes through, the squeezing rollers squeeze the surface of the strip. The squeezing rollers (38) cooperate with the sealing overflow mechanism.

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