A steel coil pickling device and a pickling method thereof

Abstract

The application discloses a steel coil pickling device and a pickling method thereof in the technical field of steel coil processing, which comprises a pickling tank, a winding guide mechanism, a floating plate, a protruding block, a fixed plate and a forming groove; and a lifting mechanism for driving the floating plate to move vertically. The lifting mechanism drives the floating plate to move downward, so that the protruding block at the bottom of the floating plate extrudes the surface of the steel strip, wrinkles and breaks the oxide layer on the surface of the steel strip, increases the contact range of the pickling liquid in the pickling tank with the oxide layer, and improves the pickling efficiency; when the protruding block extrudes the surface of the steel strip, the floating tension roller can produce a certain transverse movement when being extruded by the steel strip, so that the steel strip can be in a certain relaxed state, thus avoiding that the tension of the steel strip is too large, the protruding block cannot extrude the steel strip or the extruding force is not enough, the oxide on the surface of the steel strip cannot be wrinkled and broken, and thus the pickling efficiency and quality are affected.

Description

Technical Field

[0001] This invention relates to the field of steel pickling technology, specifically to a steel coil pickling apparatus and pickling method. Background Technology

[0002] Hot rolling is the opposite of cold rolling. Cold rolling is rolling performed below the recrystallization temperature, while hot rolling is rolling performed above the recrystallization temperature. Simply put, a steel billet is heated, rolled several times, trimmed, and straightened to become a steel plate; this is called hot rolling. It significantly reduces energy consumption and costs. During hot rolling, the metal has high plasticity and low deformation resistance, greatly reducing the energy consumption of metal deformation. Hot rolling improves the machinability of metals and alloys by breaking down coarse grains in the cast state, significantly healing cracks, reducing or eliminating casting defects, transforming the as-cast structure into a deformed structure, and improving the machinability of alloys. During the hot rolling process, the surface of the steel reacts with oxygen to produce an oxide scale. To ensure the quality and lifespan of the steel in subsequent use, pickling is necessary.

[0003] During the production and processing of hot-rolled steel strip, after hot rolling and straightening, it is necessary to remove the oxide scale on the surface of the steel strip. Currently, the steel strip is put into an pickling tank containing pickling solution, and then the steel strip is wound up by a winding device. During the winding process, the oxide scale on the surface of the steel strip comes into contact with and reacts with the pickling solution in the pickling tank, thereby achieving the purpose of removing the oxide scale.

[0004] For example, patent publication number CN 111020606 A discloses a method for pickling hot-rolled carbon steel coils and a method for producing waste acid. The method for pickling hot-rolled carbon steel coils includes the following steps: (1) feeding; (2) uncoiling; (3) pickling, placing the hot-rolled carbon steel coils into the pickling tank for pickling, and treating the waste gas generated during pickling; (4) rinsing, rinsing the pickled hot-rolled carbon steel coils, and recycling the wastewater after rinsing; (5) drying; (6) oiling; (8) uncoiling; (9) warehousing. The method for producing waste acid includes recycling the waste acid solution after pickling in the pickling tank and reusing it.

[0005] While the technical solution proposed in this application ensures that hot-rolled carbon steel coils do not become damp during uncoiling and warehousing, and do not rust after warehousing, thus protecting the environment and saving costs, in actual use, the steel coils undergo simple rinsing in the pickling tank. Because the oxide scale is usually layered, and the contact time between the oxide scale and the pickling solution is short as the coiling device winds up the steel strip, it cannot quickly penetrate into the pickling solution. This results in poor oxide scale removal, leading to low removal efficiency and affecting the pickling quality.

[0006] Therefore, we propose a pickling method and apparatus for pickling steel coils. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a steel coil pickling device and pickling method. In order to solve the above-mentioned technical problem, the present invention provides the following technical solution:

[0008] This invention provides: a steel coil pickling apparatus, including a pickling tank, and further comprising:

[0009] A winding guide mechanism installed in the pickling tank;

[0010] A floating plate is vertically and slidably connected to the pickling tank, and a protrusion is fixedly attached to the bottom surface of the floating plate;

[0011] A fixing plate is horizontally fixed to the inner wall of the pickling tank, and a forming groove is provided on the top surface of the fixing plate for the protrusion to engage.

[0012] A lifting mechanism for driving the floating plate to move vertically.

[0013] Preferably, the winding guide mechanism includes:

[0014] Guide rollers, which are horizontally rotatably connected to opposite ends of the pickling tank, are defined as the first guide roller and the second guide roller, respectively.

[0015] A fixed tensioning roller is horizontally rotatably connected to the pickling tank;

[0016] A sliding seat is horizontally slidably connected to the pickling tank. A floating tension roller is horizontally rotatably connected to the sliding seat. The fixed tension roller and the floating tension roller correspond to the first guide roller and the second guide roller, respectively.

[0017] A tension adjustment unit for enabling the sliding seat to move toward the fixed tension roller after the floating plate has moved downward to a fixed position.

[0018] Preferably, the tension adjustment unit includes:

[0019] A fixing frame plate is horizontally fixed to the inner wall of the pickling tank;

[0020] A sliding rod that is horizontally inserted through the fixed frame plate and can slide freely, one end of the sliding rod being fixedly connected to the sliding seat and the other end being fixedly connected to a movable arm;

[0021] A floating block is fixed to the floating plate, and the upper end of the floating block is provided with an inclined surface facing the moving arm. The end of the moving arm is used in conjunction with the inclined surface.

[0022] An elastic abutment structure for driving the sliding seat to move away from the floating block.

[0023] Preferably, the moving arm is rotatably connected to a first roller at one end facing the floating block, and the first roller makes rolling contact with the side wall and inclined surface of the floating block.

[0024] Preferably, the elastic abutment structure includes:

[0025] A spring that is wrapped around the sliding rod and whose two ends in the direction of elastic force respectively elastically abut against the fixed frame plate and the sliding seat;

[0026] A fixing pin is vertically inserted through the top of the fixed frame plate, and the sliding rod has a waist-shaped groove for the fixing pin to be inserted.

[0027] Preferably, the lifting mechanism includes:

[0028] A mounting plate horizontally connected to the top of the pickling tank;

[0029] A lifting cylinder is vertically mounted on the mounting plate;

[0030] Drive the first floating rod connected to the cylinder rod of the lifting cylinder.

[0031] Preferably, a hollow chamber is fixed to the bottom surface of the mounting plate, a piston is fitted onto the upper end of the first floating rod, the piston engages within the hollow chamber and can slide freely up and down, a buffer space is formed between the piston and the bottom surface of the mounting plate, a first interface communicating with the buffer space is provided on the outer wall of the hollow chamber, a fixed arm is integrally connected to the moving arm, a second interface extending into the fixed arm is provided, the first interface is connected to the second interface through a pipe, the mounting chamber is integrally connected to the fixed arm, the mounting chamber is hollow inside, a connecting pipe extending downwards is provided on the outer wall of the mounting chamber, a water spray plate is fixed to the lower end of the connecting pipe, a water spray groove is provided inside the water spray plate, the water spray groove communicates with the connecting pipe, and the connecting pipe, mounting chamber, water spray groove and second interface are interconnected.

[0032] Preferably, the mounting chamber is rotatably connected to a rotating shaft, which is coaxial with the mounting chamber. The rotating shaft has multiple rotating blades at its portion inside the mounting chamber. A swing arm is fixedly fitted onto one end of the rotating shaft that extends out of the mounting chamber. Ear plates are fixedly connected to both sides of the fixed arm. A second floating rod that can slide freely up and down is vertically inserted through the ear plate. A striking plate is horizontally fixed to the lower ends of the two floating rods. A second roller is rotatably connected to the upper end of the second floating rod. The second roller works in conjunction with the swing arm. A drive unit for driving the second floating rod to move downwards is provided on the ear plate.

[0033] Preferably, the drive unit includes a tension spring wrapped around the second floating rod, with the two ends of the tension spring elastically abutting against the ear plate and the striking plate, respectively, in the direction of the spring force.

[0034] A pickling method for pickled steel coils, comprising:

[0035] The steel strip to be pickled passes sequentially between the first guide roller, the fixed tension roller, the floating tension roller, and the second guide roller, so that the fixed tension roller and the floating tension roller tension the steel strip. The steel strip is in an inverted "V" shape in the pickling tank, and passes between the fixed plate and the floating plate. The lifting cylinder is activated, the cylinder rod of the lifting cylinder extends, and drives the first floating rod to move downward. When it moves downward, it drives the floating plate to move downward, so that the protrusion squeezes the steel strip into the forming groove, causing wrinkles to form on the surface of the steel strip. As a result, the oxide scale on the surface of the steel strip is affected by the wrinkles and cracks.

[0036] As the floating plate moves downward, it drives the floating block downward, causing the first roller to roll from the side wall of the floating block to the inclined plane and then disengage from the inclined plane. At this time, the first roller loses the compression of the floating block, allowing the sliding rod to move towards the floating block. Consequently, when the protrusion squeezes the steel strip into the forming groove, the end of the steel strip corresponding to the second guide roller will be pulled by the protrusion, causing the steel strip to squeeze the floating tension roller. The floating tension roller overcomes the elastic force of the spring and moves towards the sliding seat, causing the spring to be compressed. This results in the steel strip becoming relaxed to a certain extent during the process of the protrusion squeezing the steel strip.

[0037] The cylinder rod of the lifting cylinder shortens and drives the first floating rod to move upward. When the first floating rod moves upward, the first roller will start to contact the inclined surface on the floating block until it rolls from the inclined surface to the side wall of the floating block, thereby driving the moving arm to move away from the floating block. This causes the sliding rod to drive the floating tension roller to move, increasing the axial distance between the floating tension roller and the fixed tension roller, thereby tensioning the steel strip. At this time, the steel strip changes from a relaxed state to a tensioned state.

[0038] When the first floating rod moves upward, it will drive the piston to move upward in the hollow chamber, so that the air in the buffer space of the hollow chamber is squeezed into the first interface, and then enters the second interface from the first interface, and then enters the installation chamber, and impacts the rotating blades in the installation chamber, causing the rotating blades to be driven by the airflow to rotate, thereby driving the rotating shaft to rotate. Then the airflow enters the spray tank of the spray plate from the connecting pipe. When the airflow is sprayed into the pickling solution, it will agitate the pickling solution, thereby increasing the flow rate of the pickling solution near the surface of the steel strip with wrinkled oxide scale.

[0039] When the rotating shaft rotates, it drives the swing arm to rotate. When the swing arm rotates, it intermittently presses the second roller, thereby driving the second floating rod to move downward. When the second floating rod moves downward, it drives the striking plate to move downward quickly against the tension of the tension spring, so that the striking plate can strike the surface of the steel strip and generate a vibration force on the surface of the steel strip. When the swing arm disengages from the second roller, the tension spring will pull the striking plate upward, so that the striking plate moves upward and returns to its original position.

[0040] Compared with the prior art, the beneficial effects of the present invention are:

[0041] This invention, by setting up a floating plate, a fixed plate and a lifting mechanism, drives the floating plate to move downward, so that the protrusions at the bottom of the floating plate press against the surface of the steel strip, causing the oxide layer on the surface of the steel strip to wrinkle and break, thereby increasing the contact range between the pickling solution and the oxide layer in the pickling tank and improving the pickling efficiency.

[0042] This invention sets up a floating tension roller and a fixed tension roller. When the protrusions press against the surface of the steel strip, the floating tension roller can move laterally under the pressure of the steel strip, thereby allowing the steel strip to relax to a certain extent. This avoids excessive tension on the steel strip, which would prevent the protrusions from pressing against the steel strip or prevent the pressing force from being insufficient, thus preventing the oxide scale on the surface of the steel strip from wrinkling and cracking, which would affect the efficiency and quality of pickling.

[0043] This invention, by setting the first floating rod to move upward, drives the piston to move within the hollow chamber, thereby compressing the air in the buffer space to the first interface, and then from the first interface into the second interface, and subsequently spraying it out from the spray trough of the connecting pipe and the spray plate. This causes the compressed airflow to agitate the pickling solution in the pickling tank, increasing the flow velocity of the pickling solution near the steel strip area where wrinkles are formed on the surface, increasing the probability of the pickling solution entering the oxide layer from the wrinkle breakage position, thereby improving the pickling quality and efficiency of the pickling solution;

[0044] This invention utilizes the rotation of a rotating blade impacted by airflow to rotate, which in turn drives a rotating shaft to rotate. The rotation of the shaft drives a swing arm to rotate, and the end of the swing arm away from the shaft intermittently presses against a second roller. This causes the second roller to drive a second floating rod to move downwards, allowing the striking plate to move rapidly downwards and generate a striking vibration on the surface of the steel strip. Under the action of the vibration force, the oxide scale on the surface of the steel strip can be quickly removed, improving the efficiency of oxide scale removal. Attached Figure Description

[0045] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0046] Figure 1 This is a schematic diagram of the structure of a steel coil pickling apparatus according to the present invention;

[0047] Figure 2 for Figure 1 A schematic diagram of the structure after omitting the pickling tank;

[0048] Figure 3 for Figure 2 A schematic diagram of the structure viewed from below;

[0049] Figure 4 for Figure 1 A partial sectional view of the middle structure from a side angle;

[0050] Figure 5 for Figure 2 A schematic diagram of the central structure from the front view angle;

[0051] Figure 6 for Figure 5 Enlarged schematic diagram of the local structure at point A;

[0052] Figure 7 This is a schematic diagram of the assembled structure of the floating tension roller, sliding seat, and sliding rod in this invention.

[0053] Figure 8 for Figure 7 Schematic diagram of the cross-section of the central structure;

[0054] Figure 9 This is a schematic diagram of the structure of the first floating rod, floating block and floating plate after assembly in this invention;

[0055] Figure 10 This is a schematic diagram of the structure of the fixing plate and the forming groove in this invention.

[0056] The labels in the figures are explained as follows:

[0057] 1-Pickling tank; 2-First guide roller; 3-Fixed tension roller; 4-Lifting cylinder; 5-Mounting plate; 6-Hollow chamber; 7-Fixed plate; 8-Second guide roller; 9-Fixed arm; 10-First roller; 11-Pin; 12-Sliding rod; 13-Floating tension roller; 14-Sliding seat; 15-Spring; 16-Waist-shaped groove; 17-Moving arm; 18-Fixed plate; 19-Floating plate; 20-Floating block; 21-First floating rod; 22-Striking plate; 23-Water spray horizontal plate; 24-Piston; 25-First interface; 26-Rotating shaft; 27-Swing arm; 28-Second roller; 29-Second floating rod; 30-Ear plate; 31-Tension spring; 32-Connecting pipe; 33-Mounting chamber; 34-Water spray trough; 35-Second interface; 36-Protrusion; 37-Forming groove; 38-Rotating blade. Detailed Implementation

[0058] 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.

[0059] like Figure 1-10 As shown;

[0060] This embodiment provides a technical solution: a steel coil pickling device, including a pickling tank 1, into which an appropriate amount of pickling solution is added. Furthermore, a first guide roller 2 and a second guide roller 8 are horizontally rotatably connected to opposite ends of the pickling tank 1 along its length. The first guide roller 2 corresponds to the unwinding mechanism in an external winding device; that is, the unwinding mechanism unwinds the steel strip from right to left around the first guide roller 2. A fixed tension roller 3, located below the first guide roller 2, is horizontally rotatably connected within the pickling tank 1 via a bearing seat. The steel strip passing through the first guide roller 2 then winds around the fixed tension roller 3 from bottom to top. Additionally, at the other end of the pickling tank 1, a sliding seat 14 is horizontally connected via a sliding rail and a slider. A floating tension roller 13 is horizontally rotatably connected to the sliding seat 14 via a bearing. The fixed tension roller 3 and the floating tension roller 13 correspond to the first guide roller 2 and the second guide roller 8, respectively. The steel strip passes through the fixed tension roller 3 and then wraps around the floating tension roller 13 from right to left. Then, the steel strip wraps around the second guide roller 8 from the right side upwards. This allows the steel strip to be guided by the first guide roller 2, the second guide roller 8, the fixed tension roller 3, and the floating tension roller 13, and then form an inverted "V" shape in the pickling tank 1.

[0061] A mounting plate 5 is screwed to the top of the middle part of the pickling tank 1, and a floating plate 19 is vertically slidably connected to the inner wall of the pickling tank 1 via a mounting slide rail and a slider. A trapezoidal protrusion 36 is welded to the bottom surface of the floating plate 19. A fixed plate 18 is horizontally welded to the inner wall of the pickling tank 1. A forming groove 37 for the protrusion 36 to engage is opened on the top surface of the fixed plate 18. A steel strip will pass between the floating plate 19 and the fixed plate 18. A floating column 21 is vertically welded to the top of the floating plate 19. A vertical column 21 is mounted on the mounting plate 5. A lifting cylinder 4 is directly connected to the floating column 21. The cylinder rod of the lifting cylinder 4 is threadedly connected to the upper end of the floating column 21. When the lifting cylinder 4 is started, its cylinder rod extends, which drives the floating column 21 to move downward. When the floating column 21 moves downward, it will drive the floating plate 19 to move downward, so that the protrusion 36 can squeeze the surface of the steel strip. In turn, the protrusion 36 squeezes the steel strip into the forming groove 37, causing the steel strip to wrinkle. After the steel strip is wrinkled and bent, the oxide layer on the surface of the steel strip will crack.

[0062] A sliding rod 12, capable of free sliding, is horizontally threaded through the fixed frame plate 7. One end of the sliding rod 12 is fixedly connected to the sliding seat 14, and the other end is fixedly connected to the moving arm 17. A floating block 20 is welded onto the floating plate 19. The upper end of the floating block 20 has an inclined surface facing the moving arm 17. The end of the moving arm 17 facing the floating block 20 is rotatably connected to a first roller 10. The first roller 10 rolls in contact with the side wall and the inclined surface of the floating block 20. A spring 15 is wound around the sliding rod 12. The two ends of the spring 15 elastically abut against the fixed frame plate 7 and the sliding seat 14 respectively in the direction of the spring force. As the floating block 20 moves downward, the first roller 10 rolls from the side wall of the floating block 20 (towards the floating tension roller 13) to the inclined surface, and then disengages from the inclined surface. At this time, the first roller 10 loses the pressure of the floating block 20, allowing the sliding rod 12 to move towards the floating block 20, thereby causing the protrusion 36 to... When the steel strip is squeezed into the forming groove 37, the end of the steel strip corresponding to the second guide roller 8 will be pulled by the protrusion 36, which will cause the steel strip to squeeze the floating tension roller 13. The floating tension roller 13 overcomes the elastic force of the spring 15 and moves towards the sliding seat 14, which will cause the spring 15 to be in a compressed state. As a result, the steel strip will be relaxed to a certain extent during the process of the protrusion 36 squeezing the steel strip. The cylinder rod of the lifting cylinder 4 is shortened and drives the floating rod 21 to move upward. When the floating rod 21 moves upward, the first roller 10 will start to contact the inclined surface on the floating block 20 until it rolls from the inclined surface to the side wall of the floating block 20. This will drive the moving arm 17 to move away from the floating block 20, which will cause the sliding rod 12 to drive the floating tension roller 13 to move, which will increase the axial distance between the floating tension roller 13 and the fixed tension roller 3, thereby tensioning the steel strip. At this time, the steel strip changes from a relaxed state to a tensioned state.

[0063] In addition, a fixing pin 11 is vertically inserted into the top of the fixed frame plate 7, and the sliding rod 12 has a waist-shaped groove 16 for the fixing pin 11 to be inserted into. By inserting and limiting the fixing pin 11 into the waist-shaped groove 16, the sliding rod 12 will not detach from the fixed frame plate 7.

[0064] Additionally, a hollow chamber 6 with an internal cavity is welded to the bottom surface of the mounting plate 5. A piston 24 is fitted onto the upper end of the floating rod 21. The piston 24 engages within the hollow chamber 6 and can slide freely up and down. A buffer space is formed between the piston 24 and the bottom surface of the mounting plate 5. The outer wall of the hollow chamber 6 has a first interface 25 that communicates with the buffer space. A fixed arm 9 is integrally formed on the moving arm 17. The fixed arm 9 has a second interface 35 extending into its interior. The first interface 25 is connected to the second interface 35 through a pipe. An installation chamber 33 is integrally formed on the fixed arm 9. The installation chamber 33 is hollow inside. A connecting pipe 32 extending downwards is provided on the outer wall of the installation chamber 33. A water spray plate 23 is fixed to the lower end of the connecting pipe 32. A water spray groove 34 is formed inside the water spray plate 23. The water spray groove 34 communicates with the connecting pipe 32. The connecting pipe 32, the installation chamber 33, and the water spray groove 33 are connected in series. 4. The second interface 35 is connected through. When the floating block 20 moves downward into place, there is a gap between the piston 24 and the inner cavity of the hollow chamber 6, allowing air to enter the hollow chamber 6 through the gap. As the floating column 21 moves upward, it will cause the piston 24 to move upward. When the piston 24 moves upward, it will compress the air inside the hollow chamber 6. After compression, the air will enter the second interface 35 from the first interface 25, and then enter the installation chamber 33. It will impact the rotating blade 38 in the installation chamber 33, causing the rotating blade 38 to be driven by the airflow to rotate, thereby driving the rotating shaft 26 to rotate. Then the airflow enters the spray tank 34 of the spray plate 23 from the connecting pipe 32. When the airflow is sprayed into the pickling solution, it will agitate the pickling solution, thereby increasing the flow rate of the pickling solution near the surface of the steel strip with wrinkled oxide scale.

[0065] In addition, the mounting chamber 33 is rotatably connected to a rotating shaft 26 via a mounting bearing. The rotating shaft 26 is coaxial with the mounting chamber 33. Multiple rotating blades 38 are provided on the portion of the rotating shaft 26 located inside the mounting chamber 33. A swing arm 27 is fixedly fitted onto one end of the rotating shaft 26 extending out of the mounting chamber 33. Ear plates 30 are fixedly connected to both sides of the fixed arm 27. A second floating rod 29, capable of sliding freely up and down, is vertically inserted through the ear plates 30. A striking plate 22 is horizontally fixed to the lower ends of both second floating rods 29. A second roller 28 is rotatably connected to the upper end of the second floating rod 29. The second roller 28 works in conjunction with the swing arm 27. When the rotating shaft 26 rotates, it drives the swing arm 27 to rotate. When rotating, the second roller 28 is intermittently squeezed, which drives the second floating rod 29 to move downward. When the second floating rod 29 moves downward, it drives the striking plate 22 to move downward quickly against the tension of the tension spring 31, so that the striking plate 22 can strike the surface of the steel strip and generate vibration force on the surface of the steel strip. When the swing arm 27 disengages from the contact with the second roller 28, the tension spring 31 will pull the striking plate 22 upward, so that the striking plate 22 moves upward and returns to its original position. In addition, the second floating rod 29 is wrapped with a tension spring 31. The two ends of the tension spring 31 elastically abut against the ear plate 30 and the striking plate 22 respectively in the direction of the elastic force. The striking plate 22 can move upward and return to its original position through the tension spring 31.

[0066] Working principle of the invention:

[0067] The steel strip to be pickled passes sequentially between the first guide roller 2, the fixed tension roller 3, the floating tension roller 13, and the second guide roller 8, so that the fixed tension roller 3 and the floating tension roller 13 tension the steel strip. The steel strip is in an inverted "V" shape in the pickling tank 1, and passes between the fixed plate 18 and the floating plate 19. Then, the external winding device winds up the end of the steel strip that passes through the second guide roller 8, so that the steel strip moves in the pickling tank 1. Then, the lifting cylinder 4 is activated by the external controller. The cylinder rod of the lifting cylinder 4 extends and drives the floating rod 21 to move downward. When it moves downward, it drives the floating plate 19 to move downward, so that the protrusion 36 squeezes the steel strip into the forming groove 37, so that wrinkles are generated on the surface of the steel strip, and the oxide scale on the surface of the steel strip is affected by the wrinkles and cracks.

[0068] As the floating plate 19 moves downward, it will drive the floating block 20 to move downward, causing the first roller 10 to roll from the side wall of the floating block 20 to the inclined plane and then disengage from the inclined plane. At this time, the first roller 10 loses the squeezing of the floating block 20, allowing the sliding rod 12 to move towards the floating block 20. As a result, when the protrusion 36 squeezes the steel strip into the forming groove 37, the end of the steel strip corresponding to the second guide roller 8 will be pulled by the protrusion 36, which will cause the steel strip to squeeze the floating tension roller 13. The floating tension roller 13 overcomes the elastic force of the spring 15 and moves towards the sliding seat 14, which will cause the spring 15 to be in a compressed state, thus causing the steel strip to relax to a certain extent during the squeezing process of the protrusion 36.

[0069] The cylinder rod of the lifting cylinder 4 is shortened, which drives the floating rod 21 to move upward. When the floating rod 21 moves upward, the first roller 10 will start to contact the inclined surface on the floating block 20 until it rolls from the inclined surface to the side wall of the floating block 20. This drives the moving arm 17 to move away from the floating block 20, which causes the sliding rod 12 to drive the floating tension roller 13 to move. This increases the axial distance between the floating tension roller 13 and the fixed tension roller 3, thereby tensioning the steel strip. At this time, the steel strip changes from a relaxed state to a tensioned state.

[0070] When the floating rod 21 moves upward, it will drive the piston 24 to move upward in the hollow chamber 6, so that the air in the buffer space of the hollow chamber 6 is squeezed into the first port 25, and then enters the second port 35 from the first port 25, and then enters the installation chamber 33, and impacts the rotating blade 38 in the installation chamber 33, causing the rotating blade 38 to be driven by the airflow to rotate, thereby driving the rotating shaft 26 to rotate. Then the airflow enters the spray tank 34 of the spray plate 23 from the connecting pipe 32. When the airflow is sprayed into the pickling solution, it will agitate the pickling solution, thereby increasing the flow rate of the pickling solution near the surface of the steel strip with wrinkled oxide scale.

[0071] When the rotating shaft 26 rotates, it drives the swing arm 27 to rotate. When the swing arm 27 rotates, it intermittently presses the second roller 28, which in turn drives the second floating rod 29 to move downward. When the second floating rod 29 moves downward, it drives the striking plate 22 to overcome the tension of the tension spring 31 and move downward quickly, so that the striking plate 22 can strike the surface of the steel strip and generate vibration force on the surface of the steel strip. When the swing arm 27 disengages from the second roller 28, the tension spring 31 will pull the striking plate 22 upward, so that the striking plate 22 moves upward and returns to its original position.

[0072] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A steel coil pickling apparatus, comprising a pickling tank (1), characterized in that, Also includes: A winding guide mechanism installed in the pickling tank (1); A floating plate (19) is vertically slidably connected to the pickling tank (1), and a protrusion (36) is fixed to the bottom surface of the floating plate (19). A fixing plate (18) is horizontally fixed to the inner wall of the pickling tank (1), and the top surface of the fixing plate (18) is provided with a forming groove (37) for the protrusion (36) to engage. A lifting mechanism for driving the floating plate (19) to move vertically; The winding guide mechanism includes: The guide rollers connected to the opposite ends of the pickling tank (1) are rotated horizontally respectively. The two guide rollers are defined as the first guide roller (2) and the second guide roller (8). A fixed tensioning roller (3) is horizontally rotated and connected to the pickling tank (1). A sliding seat (14) is horizontally slidably connected to the pickling tank (1). The sliding seat (14) is horizontally rotatably connected to a floating tension roller (13). The fixed tension roller (3) and the floating tension roller (13) correspond to the first guide roller (2) and the second guide roller (8), respectively. A tension adjustment unit for enabling the sliding seat (14) to move toward the fixed tension roller (3) after the floating plate (19) moves downward to a fixed position.

2. The steel coil pickling apparatus as described in claim 1, characterized in that, The tension adjustment unit includes: A fixing frame plate (7) is horizontally fixed to the inner wall of the pickling tank (1). A sliding rod (12) is horizontally inserted through the fixed frame plate (7) and can slide freely. One end of the sliding rod (12) is fixed to the sliding seat (14), and the other end is fixed to a moving arm (17). A floating block (20) is fixed to the floating plate (19). The upper end of the floating block (20) is provided with an inclined surface facing the moving arm (17). The end of the moving arm (17) is used in conjunction with the inclined surface. An elastic abutment structure for driving the sliding seat (14) to move away from the floating block (20).

3. The steel coil pickling apparatus as described in claim 2, characterized in that, The movable arm (17) is rotatably connected to a first roller (10) at one end facing the floating block (20), and the first roller (10) makes rolling contact with the side wall and inclined surface of the floating block (20).

4. The steel coil pickling apparatus as described in claim 3, characterized in that, The elastic abutment structure includes: Springs (15) are wrapped around the sliding rod (12) and elastically abut against the fixed frame plate (7) and the sliding seat (14) at both ends in the elastic direction. A fixing pin (11) is vertically inserted through the top of the fixed frame plate (7), and the sliding rod (12) has a waist-shaped groove (16) for the fixing pin (11) to be inserted.

5. The steel coil pickling apparatus as described in claim 4, characterized in that, The lifting mechanism includes: A mounting plate (5) is horizontally connected to the top of the pickling tank (1); A lifting cylinder (4) is vertically installed on the mounting plate (5); Drive the first floating rod (21) connected to the cylinder rod of the lifting cylinder (4).

6. The steel coil pickling apparatus as described in claim 5, characterized in that, A hollow chamber (6) is fixed to the bottom surface of the mounting plate (5). A piston (24) is fitted onto the upper end of the first floating rod (21). The piston (24) is engaged in the hollow chamber (6) and can slide freely up and down. A buffer space is formed between the piston (24) and the bottom surface of the mounting plate (5). A first interface (25) communicating with the buffer space is provided on the outer wall of the hollow chamber (6). A fixed arm (9) is integrally formed on the moving arm (17). A second interface (35) extending into the fixed arm (9) is provided. The first interface (25) The fixed arm (9) is integrally connected to the second interface (35) through a pipeline. The installation chamber (33) is hollow inside. The outer wall of the installation chamber (33) is provided with a downward extending connecting pipe (32). A water spraying plate (23) is fixedly connected to the lower end of the connecting pipe (32). A water spraying groove (34) is opened in the water spraying plate (23). The water spraying groove (34) is connected to the connecting pipe (32). The connecting pipe (32), the installation chamber (33), the water spraying groove (34) and the second interface (35) are connected in a continuous manner.

7. The steel coil pickling apparatus as described in claim 6, characterized in that, The mounting chamber (33) is rotatably connected to a rotating shaft (26). The rotating shaft (26) is coaxial with the mounting chamber (33). The rotating shaft (26) located inside the mounting chamber (33) is provided with multiple rotating blades (38). One end of the rotating shaft (26) that passes through the mounting chamber (33) is fixedly fitted with a swing arm (27). Each side of the fixed arm (9) is fixedly connected with an ear plate (30). The ear plate (30) is vertically connected with a second floating rod (29) that can slide freely up and down. The lower ends of the two second floating rods (29) are horizontally fixedly connected with a striking plate (22). The upper end of the second floating rod (29) is rotatably connected with a second roller (28). The second roller (28) is used in conjunction with the swing arm (27). The ear plate (30) is provided with a drive unit for driving the second floating rod (29) to move downward.

8. The steel coil pickling apparatus as described in claim 7, characterized in that, The drive unit includes a tension spring (31) wrapped around the second floating rod (29), and the two ends of the tension spring (31) elastically abut against the ear plate (30) and the striking plate (22) respectively in the direction of the elastic force.

9. A pickling method based on the steel coil pickling apparatus according to claim 8, characterized in that, include: The steel strip to be pickled passes sequentially between the first guide roller (2), the fixed tension roller (3), the floating tension roller (13), and the second guide roller (8), so that the fixed tension roller (3) and the floating tension roller (13) tension the steel strip. The steel strip is in an inverted Z-shape in the pickling tank (1), and passes between the fixed plate (18) and the floating plate (19). The lifting cylinder (4) is activated, the cylinder rod of the lifting cylinder (4) extends, and drives the first floating rod (21) to move downward. When it moves downward, it will drive the floating plate (19) to move downward, so that the protrusion (36) squeezes the steel strip into the forming groove (37), so that wrinkles are generated on the surface of the steel strip, and the oxide scale on the surface of the steel strip is affected by the wrinkles and cracks. As the floating plate (19) moves downward, it will drive the floating block (20) to move downward, causing the first roller (10) to roll from the side wall of the floating block (20) to the inclined plane and then break away from the contact with the inclined plane. At this time, the first roller (10) loses the squeezing of the floating block (20), allowing the sliding rod (12) to move towards the floating block (20). As a result, when the protrusion (36) squeezes the steel strip into the forming groove (37), the end of the steel strip corresponding to the second guide roller (8) will be pulled by the protrusion (36), causing the steel strip to squeeze the floating tension roller (13). The floating tension roller (13) overcomes the elasticity of the spring (15) and moves towards the sliding seat (14), causing the spring (15) to be in a compressed state, thereby causing the steel strip to relax to a certain extent during the process of the protrusion (36) squeezing the steel strip. The cylinder rod of the lifting cylinder (4) is shortened and drives the first floating rod (21) to move upward. When the first floating rod (21) moves upward, the first roller (10) will start to contact the inclined surface on the floating block (20) until it rolls from the inclined surface to the side wall of the floating block (20), thereby driving the moving arm (17) to move away from the floating block (20), so that the sliding rod (12) drives the floating tension roller (13) to move, thereby increasing the axial distance between the floating tension roller (13) and the fixed tension roller (3), thereby tensioning the steel strip. At this time, the steel strip changes from a relaxed state to a tensioned state. When the first floating rod (21) moves upward, it will drive the piston (24) to move upward in the hollow chamber (6), so that the air in the buffer space of the hollow chamber (6) is squeezed into the first interface (25), and then enters the second interface (35) from the first interface (25), and then enters the installation chamber (33), and impacts the rotating blade (38) in the installation chamber (33), so that the rotating blade (38) is driven by the airflow to rotate, thereby driving the rotating shaft (26) to rotate. Then the airflow enters the spray tank (34) of the spray plate (23) from the connecting pipe (32). When the airflow is sprayed into the pickling liquid, it will agitate the pickling liquid, thereby increasing the pickling liquid flow rate near the surface of the steel strip with wrinkled oxide scale. When the rotating shaft (26) rotates, it will drive the swing arm (27) to rotate. When the swing arm (27) rotates, it will intermittently squeeze the second roller (28), thereby driving the second floating rod (29) to move downward. When the second floating rod (29) moves downward, it will drive the striking plate (22) to overcome the tension of the tension spring (31) and move downward quickly, thereby enabling the striking plate (22) to strike the surface of the steel strip and generate vibration force on the surface of the steel strip. When the swing arm (27) disengages from the contact with the second roller (28), the tension spring (31) will pull the striking plate (22) upward, causing the striking plate (22) to move upward and reset.

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