A continuous pickling apparatus for a strip steel pickling line

Abstract

The present application belongs to the field of pickling equipment, and particularly relates to a continuous pickling equipment for a strip steel pickling line, which comprises a pickling mechanism and a scraping and pickling mechanism, the pickling mechanism comprises a pickling tank, the pickling tank is respectively provided with a first pickling chamber and a second pickling chamber, a lifting guide roller device is arranged in the first pickling chamber, the lifting guide roller device comprises a fixed plate, a pressing roller, a lifting bin, a lifting guide rail and a lifting driving assembly, a movable guide roller device for changing the conveying direction of the strip steel is arranged in the second pickling chamber, the movable guide roller device comprises a rotating toothed disc, a driving motor, a driving gear, a guide roller and a cleaning roller assembly, the adjustable lifting guide roller device and the movable guide roller device can meet the rapid feeding of the strip steel, and the conveying direction of the strip steel can be changed, thereby solving the problem that it is relatively difficult to manually adjust the strip steel direction in the prior art.

Description

Technical Field

[0001] This invention belongs to the technical field of pickling equipment, specifically relating to a continuous pickling equipment for a steel strip pickling line. Background Technology

[0002] Steel strip, also known as strip steel, varies slightly in length depending on the size of each coil. Strip steel is generally supplied in coils. During the production of strip steel, it is first hot-rolled into hot steel coils. During this process, oxides, commonly known as iron oxide scale, form on the surface of the strip steel. The iron oxide scale on the surface of the strip steel is an alkaline oxide that is insoluble in water. To ensure the surface quality of the strip steel during subsequent cold rolling, the hot-rolled strip steel must be pickled before entering the cold rolling mill to remove the iron oxide scale; otherwise, the surface quality of the strip steel will be severely affected. Currently, pickling equipment uses guide rollers to convey the strip steel in an S-shape to prolong the time the strip remains in the pickling solution. However, this method requires the strip steel to pass around these guide rollers sequentially when entering the pickling tank, making the preparation work more cumbersome. Furthermore, simply soaking and brushing is insufficient to remove the oxide scale and rust from the strip steel surface, resulting in limited pickling effectiveness.

[0003] Patent No. CN202222259424.2 discloses a high-efficiency pickling device for strip steel processing, including a housing, a base, an inlet, an outlet, a guide roller, a pickling chamber, a high-efficiency pickling device, and a cleaning device. The high-efficiency pickling device includes a support, a cylinder, and a first pressure roller. The support is installed in the middle of the pickling chamber, and the cylinder is installed on the top of the housing. The piston rod at the bottom of the cylinder passes through the support, and the bottom end of the piston rod is connected and fixed to the first pressure roller. This application describes a high-efficiency pickling device driven by a cylinder, which can be unfolded to press down the strip steel through the pressure rollers at both ends, allowing the strip steel to be conveyed in an S-shape. However, its structure is complex, resulting in large stress on each hinge point during operation, making it prone to failure. Furthermore, its function is limited, only performing a soaking function and failing to effectively improve the pickling effect. Summary of the Invention

[0004] To address the aforementioned problems, this invention discloses a continuous pickling device for steel strip pickling lines, which solves the problems of unreliability, limited functionality, and unsatisfactory pickling results in existing pickling equipment.

[0005] The specific technical solution is as follows:

[0006] A continuous pickling equipment for a steel strip pickling line includes a pickling mechanism and a scraping mechanism. The pickling mechanism includes a pickling tank with an inlet and an outlet at its front and rear ends, respectively. Guide rollers are installed at the inlet and outlet positions within the tank. A first pickling chamber and a second pickling chamber are respectively provided within the tank, separated by a partition. The partition has openings, and guide rollers are also installed at these openings. A lifting guide roller device is installed in the first pickling chamber. The lifting guide roller device includes a fixed plate, a lower pressure roller, a lifting chamber, lifting guide rails, and a lifting drive assembly. Two sets of lifting guide rails are symmetrically arranged. On the inner walls of both sides of the first pickling chamber, a fixed plate is slidably installed on two sets of guide rails. The fixed plates are horizontally arranged. The middle of the two fixed plates is driven to rise and fall by a lifting drive assembly. A lower pressure roller is rotatably installed between the two ends of the two fixed plates through bearings. The lifting chamber is horizontally installed between the middle of the two fixed plates. The bottom of the lifting chamber is higher than the bottom of the two lower pressure rollers. The fixed chamber is located below the lifting chamber of the first pickling chamber. The fixed chamber is located at the lower end of the first pickling chamber. The two ends of the fixed chamber are fixed to the inner walls of the two ends of the first pickling chamber. The fixed chamber and the lifting chamber are used for horizontal passage of strip steel. Ultrasonic cleaning devices are installed inside both the fixed chamber and the lifting chamber.

[0007] The second pickling chamber is equipped with a movable guide roller device for changing the conveying direction of the strip steel. The movable guide roller device includes a rotating toothed disc, a drive motor, a drive gear, a guide roller, and a cleaning roller assembly. There are two rotating toothed discs, which are symmetrically arranged on the inner walls of both sides of the second pickling chamber. The center of each rotating toothed disc is rotatably mounted on a fixed shaft. One end of the fixed shaft is fixed to the inner wall of the second pickling chamber. A ring of toothed blocks is provided on the outer edge of the rotating toothed disc. Two rotating gear disks are connected to a drive gear on one side by meshing tooth blocks. The drive gears are rotatably mounted on the upper inner wall of the second pickling chamber. The shafts of the two drive gears are connected by a connecting shaft. One end of the connecting shaft passes through the side wall of the pickling tank and is driven to rotate by a drive motor mounted on the outer wall of the pickling tank. This allows the drive motor to drive the two rotating gear disks to rotate through the connecting shaft and the drive gears. The guide roller and cleaning roller assembly are arranged between the two rotating gear disks. The two shaft ends of the guide rollers are rotatably mounted on the two rotating gear disks, and the two guide rollers are symmetrically distributed along a fixed axis. The cleaning roller assembly is arranged between the two guide rollers and cleans the surface of the strip steel between the two guide rollers.

[0008] Furthermore, the cleaning roller assembly includes a cleaning roller, a drive shaft, and a rotary motor. One of the fixed shafts is a hollow structure, and the drive shaft is rotatably mounted at the center of the fixed shaft via a sealed bearing. One end of the drive shaft passes through the side wall of the pickling tank and is driven to rotate by the rotary motor mounted on the outer wall of the pickling tank. The other end of the drive shaft protrudes from the fixed shaft and is equipped with a drive gear. There are two cleaning rollers, symmetrically arranged on both sides of the fixed shaft. The two ends of the two cleaning rollers are rotatably mounted on a rotating gear disk via bearings. Each end of one of the two cleaning rollers is equipped with a driven gear, and the two driven gears are respectively meshed with the two sides of the drive gear. This enables the rotary motor to drive the two cleaning rollers to rotate through the cooperation of the drive gear and the driven gear, thereby allowing the two cleaning rollers to clean the surface of the strip steel.

[0009] Furthermore, the scraping mechanism includes a scraping chamber and a waste liquid tank. The scraping chamber is located at the top of the waste liquid tank. The scraping chamber contains a first squeezing chamber, a second squeezing chamber, and a scraping chamber. The first and second squeezing chambers are respectively located at both ends of the scraping chamber. A material passage is provided between the first and second squeezing chambers and the scraping chamber. Each of the first and second squeezing chambers has an opening at its far end. The opening of the first squeezing chamber corresponds to the outlet of the pickling tank. Each of the first and second squeezing chambers is equipped with a squeezing roller assembly. The squeezing roller assembly includes two squeezing rollers distributed vertically. The two squeezing rollers are respectively tightly fitted to the upper and lower surfaces of the strip. The inner walls on the front and rear sides of the scraping chamber are respectively equipped with two sets of spraying components and two scraper assemblies. The two sets of spraying components and the two scraper assemblies are distributed vertically to scrape the upper and lower surfaces of the strip.

[0010] Furthermore, the scraper assembly includes a servo motor, a hinge seat, an elastic support, and a scraper. The hinge seat is disposed on the inner wall of the rear end of the scraping chamber. One end of the elastic support is hinged to the hinge seat via a hinge shaft. The scraper is embedded in the other end of the elastic support. One end of the scraper is elastically connected to the elastic support via a spring. One end of the hinge shaft in both scraper assemblies horizontally penetrates the side wall of the scraping chamber and is provided with a transmission gear. The two transmission gears are meshed and connected. One of the hinge shafts penetrates the side wall of the scraping chamber and is driven to rotate by a servo motor installed on the outer wall of the scraping chamber.

[0011] Furthermore, the bottom of the first squeezing chamber, the second squeezing chamber, and the scraping chamber are all provided with drainage channels, and the drainage channels are connected to the waste liquid tank at the bottom of the scraping chamber through pipelines.

[0012] Furthermore, each of the lifting drive components includes a lifting motor, a lead screw, a rotating seat, and a rotating shaft. There are two sets of rotating seats, which are respectively set on the inner walls of both sides of the pickling tank. Each rotating seat has a lead screw that is rotatably mounted longitudinally. Each lead screw is threadedly connected to a lead screw seat. The two lead screw seats are respectively fixedly connected to two fixed plates. The top ends of the two lead screws pass through the rotating seats and are provided with driven bevel gears. One side of each of the two driven bevel gears is meshed with a driving bevel gear. Both driving bevel gears are set on the rotating shaft. The two ends of the rotating shaft are horizontally mounted on the upper end of the first pickling chamber through bearings. One end of the rotating shaft is driven by a lifting motor installed on the outer wall of the pickling tank, so that the lifting drive component can drive the fixed plate, the lower pressure roller, and the lifting chamber to lift.

[0013] Furthermore, a telescopic tube is longitudinally arranged at the top of one end of the lifting chamber. The top end of the telescopic tube is bent and horizontally penetrates the upper side wall of the pickling tank. One end of the telescopic tube is connected to the lifting chamber, and the other end is connected to the outside of the pickling tank. An electrical circuit is installed in the telescopic tube for electrical connection between the ultrasonic cleaning device and the external circuit.

[0014] Furthermore, the ultrasonic cleaning device includes several ultrasonic transducers disposed on the inner wall of the fixed chamber and the lifting chamber adjacent to each other, and an ultrasonic generator electrically connected to the ultrasonic transducers.

[0015] The beneficial effects of this invention are reflected in:

[0016] In this invention, the pickling tank performs two pickling processes on the strip steel through a first pickling chamber and a second pickling chamber. The first pickling chamber and the second pickling chamber are respectively equipped with a lifting guide roller assembly and a movable guide roller device, which can meet the requirements of rapid feeding of the strip steel and can change the conveying direction of the strip steel, thereby solving the problem that it is relatively difficult to manually adjust the direction of the strip steel in the prior art.

[0017] In this invention, the lifting guide roller assembly uses two downward pressure rollers to press down on the strip steel, which drives the lifting chamber to descend. This allows the lifting chamber and the fixed chamber to clean the upper and lower surfaces of the strip steel respectively through an ultrasonic cleaning device, thus meeting the cleaning requirements of the two surfaces of the strip steel and improving the pickling quality.

[0018] In this invention, after the movable guide roller device is flipped by the movable toothed disc, the two cleaning rollers can always be in contact with the strip steel, and can brush and clean the upper and lower surfaces of the strip steel under the drive of the rotating motor, which greatly improves the pickling quality.

[0019] In this invention, the scraping mechanism cleans and scrapes the surface of the strip steel through a spray assembly and a scraper assembly, which can effectively remove pickling liquid from the surface of the strip steel. Furthermore, the scraper assembly can be expanded or retracted under the drive of a servo motor, thereby enabling surface feeding of the strip steel, which is highly practical. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention during operation.

[0021] Figure 2 This is a schematic diagram of the structure before the invention is put into operation.

[0022] Figure 3 This is a front sectional view of the first pickling chamber in this invention.

[0023] Figure 4 This is a front sectional view of the second pickling chamber in this invention.

[0024] Figure 5 for Figure 4 Enlarged diagram of point A in the middle.

[0025] Figure 6 This is a side view of the scraping chamber in this invention.

[0026] Figure 7 for Figure 6 Sectional view along line AA.

[0027] Figure 8 for Figure 2 Enlarged diagram of point B in the middle.

[0028] Pickling tank 1, first pickling chamber 101, second pickling chamber 102, partition 103, feed inlet 11, discharge outlet 12, guide roller 13;

[0029] 2. Lifting guide roller device, 21. Fixed plate, 22. Lower pressure roller, 23. Lifting chamber, 231. Telescopic tube, 24. Lifting guide rail, 25. Lifting motor, 26. Lead screw, 261. Driven bevel gear, 27. Rotating seat, 28. Rotating shaft, 281. Driven bevel gear, 29. Fixed chamber, 291. Ultrasonic cleaning device;

[0030] The components include: movable guide roller device 3, rotating toothed disc 31, toothed block 311, drive gear 32, connecting shaft 321, guide roller 33, driven gear 331, cleaning roller 34, drive shaft 35, rotary motor 36, driving gear 361, and fixed shaft 37.

[0031] 4. Scraping chamber 41, first squeezing chamber 42, second squeezing chamber 43, scraping chamber 44, material passage 45, squeezing roller assembly 46, spray assembly 47, scraper assembly 47, servo motor 471, hinge seat 472, hinge shaft 473, elastic support 474, scraper 475, transmission gear 476.

[0032] 5. Waste liquid tank; 6. Unwinding device; 7. Winding device; 8. Strip steel. Detailed Implementation

[0033] To make the technical solution of this invention clearer and more explicit, the invention will be further described below with reference to the accompanying drawings. Any solution derived by equivalent substitution and conventional reasoning of the technical features of this invention falls within the protection scope of this invention. The fixed connections and fixed installations mentioned in this invention are all common connection methods in the mechanical field, including welding, bolt and nut connections, and screw connections.

[0034] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] like Figure 1-3As shown, a continuous pickling equipment for a strip steel pickling line is provided. The pickling equipment has an unwinding device 6 and a winding device 7 at its front and rear ends for winding and unwinding the strip steel 8, respectively. The pickling equipment includes a pickling mechanism and a scraping mechanism. The pickling mechanism includes a pickling tank 1 with a top cover. The pickling tank 1 has an inlet 11 and an outlet 12 at its front and rear ends, respectively. Guide rollers 13 are respectively installed at the inlet 11 and outlet 12 within the inner cavity of the pickling tank 1. The pickling tank 1 contains a first pickling... The first pickling chamber 101 and the second pickling chamber 102 are separated by a partition 103. The partition 103 has an opening, and a guide roller 13 is rotatably installed at the opening. A lifting guide roller device 2 is installed in the first pickling chamber 101. The lifting guide roller device 2 includes a fixed plate 21, a lower pressure roller 22, a lifting chamber 23, lifting guide rails 24, and a lifting drive assembly. There are two sets of lifting guide rails 24, which are symmetrically arranged on the inner walls of both sides of the first pickling chamber. A fixed plate 21 is slidably arranged on each of the two fixed plates 21. The fixed plates 21 are horizontally arranged. The middle of the two fixed plates 21 is driven to rise and fall by a lifting drive assembly. A lower pressure roller 22 is rotatably arranged between the two ends of the two fixed plates 21 through bearings. The lifting chamber 23 is horizontally arranged between the middle of the two fixed plates 21. The bottom of the lifting chamber 23 is higher than the bottom of the two lower pressure rollers 22. The first pickling chamber 101 is located below the lifting chamber 23 and a fixed chamber 29 is arranged below it. Both the lifting chamber 23 and the fixed chamber 29 are rectangular structures. The fixed chamber 29 is located at the lower end of the first pickling chamber 101. The two ends of the fixed chamber 29 are fixed to the inner walls of the two ends of the first pickling chamber. The inner cavity of the fixed chamber 29 is connected to the outside. The fixed chamber 29 and the lifting chamber 23 are used for the horizontal passage of the strip steel 8. An ultrasonic cleaning device 291 is arranged inside both the fixed chamber 29 and the lifting chamber 23. The ultrasonic cleaning device includes several ultrasonic transducers arranged on the inner walls of the fixed chamber 29 and the lifting chamber 23 on the adjacent side, and an ultrasonic generator electrically connected to the ultrasonic transducers.

[0036] The lifting drive assembly includes a lifting motor 25, a lead screw 26, a rotating seat 27, and a rotating shaft 28. There are two sets of rotating seats 27, which are respectively set on the inner walls of both sides of the pickling tank 1. The lead screw 26 is longitudinally rotatably arranged in each rotating seat 27. Each lead screw 26 is threadedly connected to a lead screw seat (not shown in the figure). The two lead screw seats 26 are respectively fixedly connected to two fixed plates 21. The top ends of the two lead screws 26 pass through the rotating seat 27 and are provided with driven bevel gears 261. One side of each of the two driven bevel gears 261 is meshed with a driving bevel gear 281. The two driving bevel gears 281 are both set on the rotating shaft 28. The two ends of the rotating shaft 28 are horizontally rotatably set on the upper end of the first pickling chamber 101 through bearings. One end of the rotating shaft 28 is driven by the lifting motor 25 installed on the outer wall of the pickling tank 1, so that the lifting drive assembly drives the fixed plate 21, the lower pressure roller 22, and the lifting chamber 23 to lift.

[0037] A telescopic tube 231 is longitudinally arranged at the top of one end of the lifting chamber 23. The top end of the telescopic tube 231 is bent and horizontally penetrates the upper side wall of the pickling tank 1. One end of the telescopic tube 231 is connected to the lifting chamber 23, and the other end is connected to the outside of the pickling tank 1. An electrical circuit is provided in the telescopic tube 231 for the ultrasonic cleaning device to be electrically connected to the external circuit, thereby ensuring normal use.

[0038] The second pickling chamber 102 is equipped with a movable guide roller device 3 for changing the conveying direction of the strip steel. The movable guide roller device 3 includes a rotating toothed disc 31, a drive motor, a drive gear 32, a guide roller 33, and a cleaning roller assembly. There are two rotating toothed discs 31, which are symmetrically arranged on the inner walls of both sides of the second pickling chamber 102. The center of each rotating toothed disc 31 is rotatably mounted on a fixed shaft 37. One end of the fixed shaft 37 is fixed to the inner wall of the second pickling chamber 102. A ring of toothed blocks 311 is provided on the outer edge of the rotating toothed disc 31. Two rotating toothed discs 31 are connected to a drive gear 32 on one side by tooth blocks 311. The drive gear 32 is rotatably mounted on the upper end of the inner wall of the second pickling chamber 102. The shafts of the two drive gears 32 are connected by a connecting shaft 321. One end of the connecting shaft 321 passes through the side wall of the pickling tank 1 and is driven to rotate by a drive motor (not shown in the figure) mounted on the outer wall of the pickling tank 1. The drive motor drives the two rotating toothed discs 31 to rotate through the connecting shaft 321 and the drive gear 32, thereby causing the guide roller 33 to carry the strip steel in an S-shape and immerse the strip steel in the pickling solution. The guide roller 33 and the cleaning roller assembly are arranged between the two rotating toothed discs 31. The two shaft ends of the guide roller 33 are rotatably mounted on the two rotating toothed discs 31, and the two guide rollers 33 are symmetrically distributed along the fixed axis 37. The cleaning roller assembly is arranged between the two guide rollers 33 and cleans the surface of the strip steel between the two guide rollers 33.

[0039] like Figure 4-5 As shown, the cleaning roller assembly includes cleaning rollers 34, a drive shaft 35, and a rotary motor 36. One of the fixed shafts 37 is a hollow structure, with the drive shaft 35 rotatably mounted at its center via a sealed bearing. One end of the drive shaft 35 penetrates the side wall of the pickling tank 1 and is driven to rotate by the rotary motor 36 mounted on the outer wall of the pickling tank 1. The other end of the drive shaft 35 protrudes from the fixed shaft 37 and is equipped with a drive gear 361. Two cleaning rollers 34 are symmetrically arranged on both sides of the fixed shaft 37, ensuring that the two cleaning rollers... The tangent direction between the rollers 34 and the tangent direction between the two guide rollers 33 are on the same straight line. The two shaft ends of the two cleaning rollers 34 are rotatably mounted on the rotating gear disk 31 through bearings. A driven gear 331 is provided on one shaft end of each of the two cleaning rollers 34. The two driven gears 331 are respectively meshed with the two sides of the driving gear 361, so that the rotary motor 36 drives the two cleaning rollers 34 to rotate through the cooperation of the driving gear 361 and the driven gear 331, thereby enabling the two cleaning rollers 34 to brush and clean the surface of the strip steel.

[0040] like Figure 6-8 As shown, the scraping mechanism includes a scraping chamber 4 and a waste liquid tank 5. The scraping chamber 4 is located at the top of the waste liquid tank 5. The scraping chamber 4 contains a first squeezing chamber 41, a second squeezing chamber 42, and a scraping chamber 43. The first squeezing chamber 41 and the second squeezing chamber 42 are respectively located at both ends of the scraping chamber 4. Drainage channels are provided at the bottom of the first squeezing chamber 41, the second squeezing chamber 42, and the scraping chamber 43. The drainage channels are connected to the waste liquid tank 5 at the bottom of the scraping chamber 4 via pipes. A flat material passage 44 is provided between the first squeezing chamber 41, the second squeezing chamber 42, and the scraping chamber 43 to prevent liquid from splashing in each chamber. Openings are provided at the far ends of the first squeezing chamber 41 and the second squeezing chamber 42. The opening of the first squeezing chamber 41... Corresponding to the discharge port 12 of the pickling tank 1, a squeezing roller group 45 is provided in both the first squeezing chamber 41 and the second squeezing chamber 42. The squeezing roller group 45 includes two squeezing rollers distributed vertically. The two squeezing rollers are respectively tightly fitted to the upper and lower end surfaces of the strip. An openable observation window is provided on one side of the scraping chamber 43. Two sets of spraying components 46 and two scraper components 47 are respectively provided on the inner walls of the front and rear sides of the scraping chamber 43. The two sets of spraying components 46 and the two scraper components 47 are distributed vertically to scrape and wash the upper and lower end surfaces of the strip. The spraying components 46 include at least two spray heads. The spray heads are connected to external tap water and clean the surface of the strip to remove pickling solution.

[0041] The scraper assembly 47 includes a servo motor 471, a hinge seat 472, an elastic support 474, and a scraper 475. The hinge seat 472 is disposed on the inner wall of the rear end of the scraping chamber 43. One end of the elastic support 474 is hinged to the hinge seat 472 via a hinge shaft 473. The scraper 475 is embedded in the other end of the elastic support 474. One end of the scraper 475 is elastically connected to the elastic support 474 via a spring. One end of the hinge shaft 473 in both scraper assemblies 47 horizontally penetrates the side wall of the scraping chamber 4 and is provided with a transmission gear 476. The two transmission gears 476 are meshed and connected. One of the hinge shafts 473 penetrates the side wall of the scraping chamber 4 and is driven to rotate by the servo motor 471 installed on the outer wall of the scraping chamber 4, so that the servo motor 471 can drive the two scrapers to move simultaneously. When the two scrapers are unfolded, they are used for the strip steel to pass through. When the two scrapers are close together, they are respectively attached to the upper and lower end surfaces of the strip steel, thereby scraping the surface of the strip steel.

[0042] Before operation, the unwinding device 6 unwinds the strip steel, while the strip steel to be pickled is manually extended horizontally from the feed inlet 11 into the pickling tank 1 and horizontally from the discharge outlet 12 into the scraping chamber 4. The coiling device 7 then coils the strip steel to a certain length. During operation, the movable guide roller device 3 first drives the movable gear disc to rotate via the drive gear 32, and the two guide rollers 33 move the strip steel. Subsequently, the lifting guide roller assembly uses two pressing rollers 22 to press the strip steel down, immersing it in the pickling solution. During this process, the coiling device 7 and the unwinding device... 6. Simultaneously, the uncoiling operation is carried out. Then, the ultrasonic cleaning device performs high-efficiency pickling treatment on the upper and lower surfaces of the strip to remove surface rust and oxide scale. Subsequently, two cleaning rollers 34 brush the surface of the strip to further remove rust and oxide scale. After pickling, the scraping mechanism first squeezes the surface of the strip through a set of squeezing rollers to remove the pickling liquid. Then, the spray assembly 46 and the scraper assembly 47 clean and scrape the surface of the strip to remove the pickling liquid. Finally, a set of squeezing rollers removes the moisture from the surface of the strip to complete the pickling treatment.

[0043] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A continuous pickling equipment for a steel strip pickling line, comprising a pickling mechanism and a scraping mechanism, wherein the pickling mechanism includes a pickling tank, with an inlet and an outlet respectively provided at the front and rear ends of the pickling tank, and guide rollers respectively provided at the inlet and outlet positions within the inner cavity of the pickling tank; a first pickling chamber and a second pickling chamber are respectively provided within the pickling tank, the first pickling chamber and the second pickling chamber being separated by a partition, the partition having an opening, and a guide roller also being provided at the opening, characterized in that... A lifting guide roller device is provided in the first pickling chamber. The lifting guide roller device includes a fixed plate, a lower pressure roller, a lifting chamber, a lifting guide rail, and a lifting drive assembly. There are two sets of lifting guide rails, which are symmetrically arranged on the inner walls of both sides of the first pickling chamber. A fixed plate is slidably arranged on each of the two sets of guide rails. The fixed plates are arranged horizontally. The middle of the two fixed plates is driven to lift by the lifting drive assembly. A lower pressure roller is rotatably arranged between the two ends of the two fixed plates through bearings. The lifting chamber is arranged horizontally between the middle of the two fixed plates. The bottom of the lifting chamber is higher than the bottom of the two lower pressure rollers. The fixed chamber is located below the lifting chamber in the first pickling chamber. The fixed chamber is located at the lower end of the first pickling chamber. The two ends of the fixed chamber are fixed to the inner walls of the two ends of the first pickling chamber. The fixed chamber and the lifting chamber are used for horizontal passage of strip steel. An ultrasonic cleaning device is provided inside both the fixed chamber and the lifting chamber. The second pickling chamber is equipped with a movable guide roller device for changing the conveying direction of the strip steel. The movable guide roller device includes a rotating toothed disc, a drive motor, a drive gear, a guide roller, and a cleaning roller assembly. There are two rotating toothed discs, which are symmetrically arranged on the inner walls of both sides of the second pickling chamber. The center of each rotating toothed disc is rotatably mounted on a fixed shaft. One end of the fixed shaft is fixed to the inner wall of the second pickling chamber. A ring of toothed blocks is provided on the outer edge of the rotating toothed disc. Two rotating gear disks are each connected to a drive gear on one side via toothed blocks. The drive gears are rotatably mounted on the upper inner wall of the second pickling chamber. A connecting shaft connects the shafts of the two drive gears. One end of the connecting shaft passes through the side wall of the pickling tank and is driven to rotate by a drive motor mounted on the outer wall of the pickling tank. This allows the drive motor to rotate the two rotating gear disks via the connecting shaft and the drive gears. A guide roller and cleaning roller assembly is disposed between the two rotating gear disks. The two shaft ends of the guide rollers are rotatably mounted on the two rotating gear disks, and the two guide rollers are symmetrically distributed along a fixed axis. The cleaning roller assembly is disposed between the two guide rollers and cleans the surface of the strip steel between the two guide rollers. The cleaning roller assembly includes a cleaning roller, a drive shaft, and a rotary motor. One of the fixed shafts is a hollow structure, and the drive shaft is rotatably mounted on the center of the fixed shaft via a sealed bearing. One end of the drive shaft passes through the side wall of the pickling tank and is driven to rotate by the rotary motor mounted on the outer wall of the pickling tank. The other end of the drive shaft protrudes from the fixed shaft and is equipped with a drive gear. There are two cleaning rollers, symmetrically arranged on both sides of the fixed shaft. The two ends of the two cleaning rollers are rotatably mounted on a rotating gear disk via bearings. Each end of one of the two cleaning rollers is equipped with a driven gear, and the two driven gears are respectively meshed with the two sides of the drive gear. This allows the rotary motor to drive the two cleaning rollers to rotate through the cooperation of the drive gear and the driven gear, thereby enabling the two cleaning rollers to clean the surface of the strip steel. The scraping mechanism includes a scraping chamber and a waste liquid tank. The scraping chamber is located at the top of the waste liquid tank. The scraping chamber contains a first squeezing chamber, a second squeezing chamber, and a scraping chamber. The first and second squeezing chambers are located at opposite ends of the scraping chamber. A material passage is provided between the first and second squeezing chambers and the scraping chamber. Each of the first and second squeezing chambers has an opening at its far end. The opening of the first squeezing chamber corresponds to the outlet of the pickling tank. Each of the first and second squeezing chambers is equipped with a squeezing roller assembly. The squeezing roller assembly includes two squeezing rollers distributed vertically. The two squeezing rollers are tightly fitted to the upper and lower surfaces of the strip steel. The inner walls of the front and rear sides of the scraping chamber are respectively equipped with two sets of spraying components and two scraper assemblies. The two sets of spraying components and the two scraper assemblies are distributed vertically to scrape the upper and lower surfaces of the strip steel. The scraper assembly includes a servo motor, a hinge seat, an elastic support, and a scraper. The hinge seat is disposed on the inner wall of the rear end of the scraping chamber. One end of the elastic support is hinged to the hinge seat via a hinge shaft. The scraper is embedded in the other end of the elastic support. One end of the scraper is elastically connected to the elastic support via a spring. One end of the hinge shaft in both scraper assemblies horizontally penetrates the side wall of the scraping chamber and is provided with a transmission gear. The two transmission gears are meshed together. One of the hinge shafts penetrates the side wall of the scraping chamber and is driven to rotate by a servo motor installed on the outer wall of the scraping chamber.

2. The continuous pickling equipment for a steel strip pickling line according to claim 1, characterized in that, The bottom of the first squeezing chamber, the second squeezing chamber, and the scraping chamber are all provided with drainage channels, and the drainage channels are connected to the waste liquid tank at the bottom of the scraping chamber through pipelines.

3. The continuous pickling equipment for a steel strip pickling line according to claim 1, characterized in that, Each lifting drive assembly includes a lifting motor, a lead screw, a rotating seat, and a rotating shaft. There are two sets of rotating seats, each set located on the inner wall of one side of the pickling tank. Each rotating seat contains a lead screw that rotates longitudinally. Each lead screw is threadedly connected to a lead screw seat. The two lead screw seats are fixedly connected to two fixed plates. The tops of the two lead screws extend upward through the rotating seat and are equipped with driven bevel gears. One side of each driven bevel gear is meshed with a driving bevel gear. Both driving bevel gears are mounted on the rotating shaft. The two ends of the rotating shaft are horizontally mounted on the upper end of the first pickling chamber via bearings. One end of the rotating shaft is driven by a lifting motor installed on the outer wall of the pickling tank, enabling the lifting drive assembly to lift the fixed plate, the lower pressure roller, and the lifting chamber.

4. A continuous pickling equipment for a steel strip pickling line according to claim 1, characterized in that, A telescopic tube is longitudinally installed at the top of one end of the lifting chamber. The top end of the telescopic tube is bent and horizontally penetrates the upper side wall of the pickling tank. One end of the telescopic tube is connected to the lifting chamber, and the other end is connected to the outside of the pickling tank. An electrical circuit is installed in the telescopic tube for the ultrasonic cleaning device to be electrically connected to the external circuit.

5. A continuous pickling equipment for a steel strip pickling line according to claim 4, characterized in that, The ultrasonic cleaning device includes several ultrasonic transducers installed on the inner walls of the fixed chamber and the lifting chamber, and an ultrasonic generator electrically connected to the ultrasonic transducers.

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