A pickling device for dirty marks on the surface of wide stainless steel panels and its pickling process

Abstract

The present invention discloses a device for pickling dirty marks on the surface of wide stainless steel panels and its pickling process, comprising a processing box, a partition, a pickling tank, a cleaning tank, a drying mechanism, a frame, a driving roller, a supporting roller, a brush roller, a squeezing roller, a scrubbing mechanism, a cleaning mechanism, a chute, and an overflow hole. The processing box is divided into a pickling tank and a cleaning tank by a partition. The processing box is provided with a plurality of driving rollers and supporting rollers, one end of the driving roller is fixedly connected to the output end of motor III, and two groups of brush rollers are provided between the supporting rollers immersed in the acid solution, one end of the brush roller is fixedly connected to the output end of motor IV. A squeezing roller is provided above the partition, one end of the squeezing roller is fixedly connected to the output end of motor V. After the brush roller is provided for preliminary cleaning, the scrubbing mechanism is used to perform fixed-point scrubbing on a local area of ​​the steel strip to ensure the surface quality of the steel strip. Finally, a drying mechanism is provided to clean residual water stains on the steel strip to avoid the formation of watermarks.

Description

Technical Field

[0001] The invention belongs to the technical field of steel strip pickling, and in particular relates to a device for pickling dirty marks on the surface of a wide stainless steel panel and a pickling process thereof. Background Art

[0002] During the rolling process of wide stainless steel panels, a large amount of water stains will remain on the surface of the steel strip after pickling and cooling. If they are not handled in time, a large number of watermarks, acid marks and other dirty marks will be produced on the surface of the steel strip, affecting the surface quality of the steel strip. The existing steel strip surface dirty mark processing equipment has the following problems during use: 1) The oxide scale produced during the pickling process is treated by means of a brush roller, etc. Since the oxide scale in some local areas of the steel strip surface is relatively thick, a single brush roller cannot clean the local area well, resulting in the formation of local black spots on the steel strip surface; 2) Since the overall width of the wide stainless steel panel is relatively wide, hot air drying is used to blow away the water stains. Large water stains cannot quickly separate from the steel strip surface or evaporate, and will roll on the steel strip for a distance, which is very likely to produce water marks and other dirty marks; 3) Using a scraper or other cleaning method can easily cause scratches on the stainless steel surface.

[0003] The prior art CN219136934U discloses a stainless steel pickling treatment device, comprising a roller conveyor, a pickling spray pipe and a cleaning spray pipe. The roller conveyor is also equipped with an air knife, which is respectively installed on the pickling spray pipe and the cleaning spray pipe on the side away from the feed end of the roller conveyor, and the air knife is connected to a high-pressure gas source; the acid liquid and the cleaning liquid on the surface of the steel plate are blown into a liquid collecting bucket by means of high-pressure gas blowing, and the inclined rollers are used to quickly separate the residual liquid on the surface of the stainless steel plate, thereby avoiding the accumulation of liquid on the surface of the steel plate to form acid marks and watermarks; however, the above technical solution has the following problems during use: 1) the high-pressure gas blowing combined with the inclined rollers will cause the residual liquid on the surface of the stainless steel plate to flow to both sides and drip, which is very easy to converge during the flow process, resulting in water marks caused by flowing water on both sides of the stainless steel plate surface, with a low pass rate and requiring secondary treatment. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a pickling device for dirty marks on the surface of wide-width stainless steel panels and its pickling process. After preliminary cleaning by setting a brush roller, the local area of ​​the steel strip is brushed by a brushing mechanism to ensure the surface quality of the steel strip, and finally a drying mechanism is set to clean the residual water stains on the steel strip to avoid the formation of watermarks.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A device for pickling dirty marks on the surface of a wide stainless steel panel comprises a processing box, a partition, a pickling tank, a cleaning tank, a drying mechanism, a frame, a driving roller, a supporting roller, a brush roller, a squeezing roller, a scrubbing mechanism, a cleaning mechanism, a chute, and an overflow hole. The processing box is divided into a pickling tank and a cleaning tank by a partition. A plurality of driving rollers and supporting rollers are provided in the processing box. One end of the driving roller is fixedly connected to the output end of motor III. Two groups of brush rollers are provided between the supporting rollers immersed in the acid solution. One end of the brush roller is fixedly connected to the output end of motor IV. A squeezing roller is provided above the partition, and one end of the squeezing roller is fixedly connected to the output end of motor V. A steel belt is wound around the driving roller, supporting roller, brush roller, and squeezing roller. A chute is provided on the side of the pickling tank, and a scrubbing mechanism is movably installed in the chute. An overflow hole is provided on one side of the cleaning tank. A cleaning mechanism is provided above the cleaning tank. A frame is provided at the outlet end of the processing box, two groups of supporting rollers are provided on the frame, and a drying mechanism is provided between the frame and the processing box.

[0007] The drying mechanism includes a lifting plate, an electric telescopic rod I, a motor I, an eccentric wheel I, a sliding plate, a slider, a guide groove, a fixed plate, a guide plate, an arc-shaped extrusion plate, a water suction roller, a motor II, a suction pipe, a water suction hole, a rotary joint I, a connecting plate I, a connecting hose I, a collection box, and a negative pressure fan. One end of the electric telescopic rod I is fixedly installed on the frame, and the other end is fixedly connected to the lifting plate. The other side of the lifting plate is engaged and movably connected with the slider provided on the sliding plate. A guide groove is provided on one side of the sliding plate. The inside of the guide groove is engaged and movably installed with one side of the eccentric wheel I. The eccentric wheel I is fixedly installed on the motor Ⅰ output end, motor Ⅰ is fixedly installed on the lifting plate, one side of the sliding plate is connected to the guide plate through a fixed plate, one side of the guide plate is provided with an arc-shaped extrusion plate, a suction pipe is movably installed on the guide plate, a plurality of water suction holes are provided on the suction pipe, and a water suction roller is fixedly wrapped around the outer side of one end with the water suction hole, the gear provided at one end of the suction pipe is meshed and connected with the gear provided at the output end of motor Ⅱ, the other end of the suction pipe is connected to the connecting hose Ⅰ through the rotary joint Ⅰ, the rotary joint Ⅰ is fixedly installed on the sliding plate through the connecting plate Ⅰ, one end of the connecting hose Ⅰ is fixedly connected to the collection box, and one side of the collection box is fixedly connected to the negative pressure fan.

[0008] The brushing mechanism includes a motor VI, a screw rod I, a limit slider, a screw II, a motor VII, a movable base, a rotating brush head, a rotary joint II, a connecting plate II, a high-pressure nozzle I, a motor VIII, a movable arm, a high-pressure nozzle II, a telescopic tube, an electric telescopic rod II, a brush, a connecting hose II, a water pump I, and a storage box I. The limit slider is meshed and installed on the screw rod I. One end of the screw rod I is movably installed on the side wall of the processing box, and the other end is fixedly connected to the output end of the motor VI. The limit slider is meshed and installed in the slide groove. A screw rod II is movably installed between the two groups of limit sliders. One end of the screw rod II is fixedly connected to the output end of the motor VII. The motor VII is fixedly installed on one side of the limit slider. A movable base is meshed and installed on the screw II. A rotating brush head is movably provided on the movable base. The gears provided on the rotating brush head The wheel is meshed with the gear provided at the output end of the motor VIII. The motor VIII is fixedly installed on one side of the movable base. The interior of the rotating brush head is hollow, and one end is connected to the connecting hose II through a rotating joint II. The rotating joint II is fixedly installed on the movable base through a connecting plate II. The other end of the connecting hose II is fixedly connected to the output end of the water pump I. The input end of the water pump I extends into the storage box I. The bottom of the rotating brush head is fixedly connected to the high-pressure nozzle I. A movable arm is provided around the rotating brush head. One side of the movable arm is movably connected to one end of the electric telescopic rod II. The other end of the electric telescopic rod II is movably installed on the rotating brush head. The hollow cavity on the rotating brush head is fixedly connected to the hollow cavity on the movable arm through a telescopic tube. The high-pressure nozzle II provided at the bottom of the movable arm is connected to the internal hollow cavity. A number of brushes are provided at the rotating brush head and the bottom of the movable arm.

[0009] The cleaning mechanism includes a guide rod, a fixed plate, a connecting rod, an eccentric wheel II, a motor IX, a high-pressure nozzle III, a rotary joint III, a motor X, a connecting hose III, a water supply pipe, a water pump II, and a storage box II. Both sides of the fixed plate are movably mounted on the guide rod, and both ends of the guide rod are fixedly mounted inside the treatment box. One side of the fixed plate is movably connected to the eccentric wheel II through a connecting rod passing through a groove on the side wall of the treatment box. The eccentric wheel II is fixedly mounted on the output end of the motor IX. The motor IX is fixedly mounted on the treatment box. Several high-pressure nozzles III are movably mounted on the fixed plate. The gears provided on two adjacent high-pressure nozzles III are meshed and installed. The gears provided on one group of high-pressure nozzles III are meshed and connected with the gears provided on the output end of the motor X. The motor X is fixedly mounted on the guide rod. One end of the high-pressure nozzle III is connected to the connecting hose III through the rotary joint III. The rotary joint III is fixedly mounted on the fixed plate. The other end of the connecting hose III is fixedly connected to the water supply pipe. One end of the water supply pipe is fixedly mounted inside the treatment box, and the other end is fixedly connected to the output end of the water pump II. The input end of the water pump II extends into the storage box II.

[0010] A scrubbing head is provided on the outside of the high-pressure nozzle III, and the cleaning liquid sprayed by the high-pressure nozzle III is used to scrub the surface of the steel strip.

[0011] A device for pickling dirty marks on the surface of a wide stainless steel panel, the pickling process steps are as follows:

[0012] 1) Pickling: The steel strip is first soaked and pickled in the pickling tank inside the treatment box to remove most of the oxide scale. The pickling process includes a mixed acid stage and a mixed acid stage. The HNO3 concentration in the mixed acid stage is 90-150g / L, the HF concentration is 20-40g / L, the metal ion concentration is less than 45g / L, and the temperature is 40-55°C. The HNO3 concentration in the mixed acid stage is 70-125g / L, the HF concentration is less than 25g / L, the metal ion concentration is less than 35g / L, and the temperature is 30-45°C.

[0013] 2) Acid brushing: The brushing mechanism above the pickling tank is used to perform high-speed brushing on the surface of the steel strip to avoid incomplete pickling and the generation of surface black spots. First, after the surface monitoring device determines the position of the steel strip surface to be treated, the rotating brush head is moved to the designated position by adjusting the two sets of screws I and II. Then, according to the size of the area to be treated, the expansion range of the movable arm is adjusted by the electric telescopic rod II. The water pump I pumps the acid stored in the storage tank I into the rotating brush head through the connecting hose II and sprays it out of the high-pressure nozzle I. After being diverted through the telescopic pipe, it enters the hollow cavity of the movable arm and is sprayed out through the high-pressure nozzle II. The motor VIII drives the rotating brush head to rotate at high speed through gear meshing, thereby cooperating with the brush and the sprayed pickling liquid to perform a secondary brushing on the local area of ​​the steel strip surface to avoid incomplete pickling and the generation of black spots and dirty marks. During the brushing process, the rotating brush head speed is controlled at 3500-8500rpm, and the time is controlled at 1-8min.

[0014] 3) Acid squeezing: The pickled steel strip passes through the squeezing roller to squeeze out most of the acid on the surface;

[0015] 4) Rinsing with clean water: After the steel strip passes through the cleaning tank, the cleaning mechanism is used again to clean the residual acid on the surface of the steel strip to prevent the acid from staying on the steel strip surface for a long time, causing corrosion and resulting in dirty marks on the surface; Motor IX drives the eccentric wheel II to rotate, thereby driving the fixed plate to reciprocate along the guide rod through the connecting rod. At the same time, the output end gear of Motor X engages with the gear on the high-pressure nozzle III to drive the high-pressure nozzle III to rotate. The brush head installed on the outside of the high-pressure nozzle III also follows the fixed plate to reciprocate on the surface of the steel strip, driving the brush head to reciprocate and rotate on the surface of the steel strip. Through rotation and reciprocating motion, multi-directional rinsing is performed, thereby achieving a better scrubbing effect and thoroughly rinsing the residual acid on the surface of the steel strip;

[0016] 5) Water removal: After rinsing, the steel strip passes through the drying mechanism on one side of the outlet end of the processing box to clean the residual water stains on the surface of the steel strip, so as to avoid watermarks on the surface of the steel strip and affect the surface quality; the water suction roller is adjusted to fit the surface of the steel strip through the electric telescopic rod I, and then the gear transmission at the output end of the motor II drives the suction pipe to rotate, thereby driving the water suction roller to rotate. The water suction roller rotates in the direction of the shear head and enters the arc-shaped extrusion plate through the guide plate. After being squeezed by the arc-shaped extrusion plate, the cleaning water in the water suction roller will be accelerated to pass through the water suction hole on the suction pipe and be sucked into the collection box by the negative pressure fan for temporary storage. During the operation of the water suction roller, the motor I at the output end of the motor I engages with the guide groove, which drives the sliding plate to reciprocate as a whole, thereby driving the water suction roller to reciprocate on the surface of the steel strip, which can avoid the problem of too much local water stains that cannot be quickly absorbed. The reciprocating water suction roller can quickly remove water stains on the surface of the steel strip and avoid watermarks on the surface of the steel strip.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1) In the brushing mechanism, the movable base can be controlled to move the rotating brush head to the specified position by adjusting two sets of screws I and II. Then, the expansion range of the movable arm is adjusted by the electric telescopic rod II according to the size of the area to be treated. The water pump I pumps the acid stored in the storage tank I into the rotating brush head through the connecting hose II and sprays it out from the high-pressure nozzle I. After being diverted by the telescopic pipe, it enters the hollow cavity of the movable arm and is sprayed out through the high-pressure nozzle II. The motor VIII drives the rotating brush head to rotate at high speed through gear meshing, thereby cooperating with the brush and the sprayed pickling liquid to perform secondary brushing on the local area of ​​the steel strip surface. This can effectively avoid the formation of black spots and dirty marks on the local area of ​​the steel strip surface caused by incomplete pickling, and greatly improve the surface quality of the steel strip after pickling;

[0019] 2) In the rinsing mechanism, motor IX drives eccentric wheel II to rotate, thereby driving the fixed plate to reciprocate along the guide rod through the connecting rod. At the same time, the output gear of motor X engages with the gear on high-pressure nozzle III to drive the high-pressure nozzle III to rotate. The brush head installed on the outside of high-pressure nozzle III also moves back and forth on the surface of the steel strip following the fixed plate, driving the brush head to reciprocate and rotate on the surface of the steel strip. Through rotation and reciprocating motion, multi-directional rinsing is performed, thereby achieving a better scrubbing effect, thoroughly rinsing the residual acid on the surface of the steel strip, and preventing the residual acid from staying on the surface of the steel strip for a long time and causing local corrosion;

[0020] 3) In the drying mechanism, the water suction roller is adjusted to fit the surface of the steel strip through the electric telescopic rod I, and then the gear transmission at the output end of the motor II drives the suction pipe to rotate, thereby driving the water suction roller to rotate. The water suction roller rotates in the direction of the shear head and enters the arc-shaped extrusion plate through the guide plate. After being squeezed by the arc-shaped extrusion plate, the cleaning water in the water suction roller will be accelerated through the water suction hole on the suction pipe and sucked into the collection box by the negative pressure fan for temporary storage. During the operation of the water suction roller, the motor I set at the output end of the motor I engages with the guide groove, which will drive the sliding plate to reciprocate as a whole, thereby driving the water suction roller to reciprocate on the surface of the steel strip, which can avoid the problem of too much local water stains that cannot be quickly absorbed, and at the same time avoid local wear of the water suction roller. The reciprocating water suction roller can quickly clean the water stains on the surface of the steel strip, avoid residual water stains on the surface of the steel strip to produce watermarks, and improve the surface quality of the steel strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Attachment Figure 1 This is a schematic diagram of a device for pickling dirty marks on the surface of a wide stainless steel panel and its pickling process structure;

[0022] Attachment Figure 2 This is a schematic side structural diagram of a device for pickling dirty marks on the surface of a wide stainless steel panel and its pickling process;

[0023] Attachment Figure 3 This is a schematic diagram of the internal structure of a device for pickling dirty marks on the surface of a wide stainless steel panel and its pickling process;

[0024] Attachment Figure 4 1. It is a schematic diagram of the brush roller structure;

[0025] Attachment Figure 5 1. It is a schematic diagram of the structure of the scrubbing mechanism;

[0026] Attachment Figure 6 It is a schematic diagram of the movable base structure;

[0027] Attachment Figure 7 It is a schematic diagram of the rotating dock structure;

[0028] Attachment Figure 8 1. It is a schematic diagram of the cleaning mechanism structure;

[0029] Attachment Figure 9 This is a schematic diagram of the structure of high-pressure nozzle III;

[0030] Attachment Figure 10 It is a schematic diagram of the drying mechanism structure;

[0031] Attachment Figure 11 is a schematic diagram of the sliding plate structure;

[0032] Attachment Figure 12 This is a schematic diagram of the installation effect of the curved extrusion plate;

[0033] Attachment Figure 13 Schematic diagram of the suction pipe structure;

[0034] Attachment Figure 14 It is attached Figure 10 A partial enlarged view of the middle A;

[0035] In the figure: 10, steel strip; 11, treatment box; 12, partition; 13, pickling tank; 14, cleaning tank; 15, drying mechanism; 16, frame; 17, drive roller; 18, support roller; 19, brush roller; 20, squeeze roller; 21, brushing mechanism; 22, cleaning mechanism; 131, chute; 141, overflow hole; 151, lifting plate; 152, electric telescopic rod I; 153, motor I; 1531, eccentric wheel I; 154 , sliding plate; 1541, slider; 1542, guide groove; 155, fixed plate; 156, guide plate; 1561, arc-shaped extrusion plate; 157, water suction roller; 1571, motor II; 158, suction pipe; 1581, water suction hole; 1582, rotary joint I; 1583, connecting plate I; 159, connecting hose I; 1591, collection box; 1592, negative pressure fan; 171, motor III; 191, motor IV; 2 01. Motor V; 211. Motor VI; 2111. Screw I; 212. Limiting Slider; 2121. Screw II; 2122. Motor VII; 213. Movable Base; 214. Rotating Brush Head; 2141. Rotating Joint II; 2142. Connecting Plate II; 2143. High-Pressure Spray Head I; 215. Motor VIII; 216. Movable Arm; 2161. High-Pressure Spray Head II; 2162. Telescopic Tube; 217. Electric Telescopic Rod II; 2 18. Brush; 219. Connecting hose II; 2191. Water pump I; 2192. Storage box I; 221. Guide rod; 222. Fixing plate; 2221. Connecting rod; 2222. Eccentric wheel II; 2223. Motor IX; 223. High-pressure nozzle III; 224. Scrubbing head; 225. Rotary joint III; 226. Motor X; 227. Connecting hose III; 228. Water supply pipe; 229. Water pump II; 2291. Storage box II. DETAILED DESCRIPTION

[0036] To facilitate understanding by those skilled in the art, Figure 1-14 , the technical solution of the present invention is further described in detail.

[0037] Example 1:

[0038] A device for pickling dirty marks on the surface of a wide stainless steel panel, comprising a processing box 11, a partition 12, a pickling tank 13, a cleaning tank 14, a drying mechanism 15, a frame 16, a driving roller 17, a supporting roller 18, a brush roller 19, a squeezing roller 20, a brushing mechanism 21, a cleaning mechanism 22, a chute 131, and an overflow hole 141. The processing box 11 is divided into a pickling tank 13 and a cleaning tank 14 by a partition 12. A plurality of driving rollers 17 and supporting rollers 18 are provided in the processing box 11. One end of the driving roller 17 is fixedly connected to the output end of the motor III 171. Two groups of brush rollers 19 are provided between the supporting rollers 18 immersed in the acid solution. The brush rollers 19 One end is fixedly connected to the output end of motor IV 191, a squeezing roller 20 is provided above the partition 12, and one end of the squeezing roller 20 is fixedly connected to the output end of motor V 201. A steel belt 10 is wound around the driving roller 17, the supporting roller 18, the brush roller 19 and the squeezing roller 20. A chute 131 is provided on the side of the pickling tank 13, and a brushing mechanism 21 is movably installed in the chute 131. An overflow hole 141 is provided on one side of the cleaning tank 14, and a cleaning mechanism 22 is provided above the cleaning tank 14. A frame 16 is provided at the outlet end of the processing box 11, and two groups of supporting rollers 18 are provided on the frame 16. A drying mechanism 15 is provided between the frame 16 and the processing box 11.

[0039] The drying mechanism 15 includes a lifting plate 151, an electric telescopic rod I 152, a motor I 153, an eccentric wheel I 1531, a sliding plate 154, a slider 1541, a guide groove 1542, a fixed plate 155, a guide plate 156, an arc-shaped extrusion plate 1561, a water suction roller 157, a motor II 1571, a suction pipe 158, a water suction hole 1581, a rotary joint I 1582, a connecting plate I 1583, a connecting hose I 159, a collecting box 1591, and a negative pressure fan 1592. One end of the electric telescopic rod I 152 is fixedly installed on the frame 16, and the other end is fixedly connected to the lifting plate 151. The other side of the lifting plate 151 is engaged and movably connected with the slider 1541 provided on the sliding plate 154. A guide groove 1542 is provided on one side of the sliding plate 154. The interior of the guide groove 1542 is engaged and movably installed with one side of the eccentric wheel I 1531. 31 is fixedly mounted on the output end of motor I 153, motor I 153 is fixedly mounted on the lifting plate 151, one side of the sliding plate 154 is connected to the guide plate 156 through the fixed plate 155, one side of the guide plate 156 is provided with an arc-shaped extrusion plate 1561, a suction pipe 158 is movably mounted on the guide plate 156, the suction pipe 158 is provided with a plurality of water suction holes 1581, a water suction roller 157 is fixedly wrapped around the outer side of one end of the water suction hole 1581, the gear provided at one end of the suction pipe 158 is meshed and connected with the gear provided at the output end of the motor II 1571, the other end of the suction pipe 158 is connected to the connecting hose I 159 through the rotary joint I 1582, the rotary joint I 1582 is fixedly mounted on the sliding plate 154 through the connecting plate I 1583, one end of the connecting hose I 159 is fixedly connected to the collecting box 1591, and one side of the collecting box 1591 is fixedly connected to the negative pressure fan 1592.

[0040] The brushing mechanism 21 includes a motor VI 211, a screw rod I 2111, a limit slider 212, a screw rod II 2121, a motor VII 2122, a movable base 213, a rotating brush head 214, a rotating joint II 2141, a connecting plate II 2142, a high-pressure nozzle I 2143, a motor VIII 215, a movable arm 216, a high-pressure nozzle II 2161, a telescopic tube 2162, an electric telescopic rod II 217, a brush 218, a connecting hose II 219, a water pump I 2191, a storage box I 2192, and a limit slider 212 engaged with the brush head. Installed on screw rod I 2111, one end of screw rod I 2111 is movably installed on the side wall of processing box 11, and the other end is fixedly connected to the output end of motor VI 211, and the limit slider 212 is meshed and installed in the slide groove 131, and screw rod II 2121 is movably installed between the two sets of limit sliders 212, one end of screw rod II 2121 is fixedly connected to the output end of motor VII 2122, and motor VII 2122 is fixedly installed on one side of limit slider 212, and a movable base 213 is meshed and installed on screw rod II 2121, and a rotating brush is movably provided on the movable base 213 The gear provided on the rotating brush head 214 is meshed with the gear provided on the output end of the motor VIII 215. The motor VIII 215 is fixedly mounted on one side of the movable base 213. The rotating brush head 214 is hollow inside, and one end is connected to the connecting hose II 219 through the rotating joint II 2141. The rotating joint II 2141 is fixedly mounted on the movable base 213 through the connecting plate II 2142. The other end of the connecting hose II 219 is fixedly connected to the output end of the water pump I 2191. The input end of the water pump I 2191 is deep in the storage box I 2192. The rotating brush The bottom of the head 214 is fixedly connected to the high-pressure nozzle I 2143, and a movable arm 216 is provided around the rotating brush head 214. One side of the movable arm 216 is movably connected to one end of the electric telescopic rod II 217, and the other end of the electric telescopic rod II 217 is movably mounted on the rotating brush head 214. The upper hollow cavity of the rotating brush head 214 is fixedly connected to the upper hollow cavity of the movable arm 216 through the telescopic tube 2162. The high-pressure nozzle II 2161 provided at the bottom of the movable arm 216 is connected to the internal hollow cavity. A number of brushes 218 are provided at the bottom of the rotating brush head 214 and the movable arm 216.

[0041] The cleaning mechanism 22 includes a guide rod 221, a fixed plate 222, a connecting rod 2221, an eccentric wheel II 2222, a motor IX 2223, a high-pressure nozzle III 223, a rotary joint III 225, a motor X 226, a connecting hose III 227, a water supply pipe 228, a water pump II 229, and a storage box II 2291. Both sides of the fixed plate 222 are movably mounted on the guide rod 221, and both ends of the guide rod 221 are fixedly mounted inside the processing box 11. One side of the fixed plate 222 passes through the through groove on the side wall of the processing box 11 through the connecting rod 2221 and is movably connected to the eccentric wheel II 2222. The eccentric wheel II 2222 is fixedly mounted on the output end of the motor IX 2223. The motor IX 2223 is fixedly mounted on the processing box 11. A number of high-pressure nozzles III223 are movably installed on the fixed plate 222. The gears on two adjacent high-pressure nozzles III223 are meshed and installed. The gears on one group of high-pressure nozzles III223 are meshed and connected with the gears on the output end of the motor X226. The motor X226 is fixedly installed on the guide rod 221. One end of the high-pressure nozzle III223 is connected to the connecting hose III227 through the rotary joint III225. The rotary joint III225 is fixedly installed on the fixed plate 222. The other end of the connecting hose III227 is fixedly connected to the water supply pipe 228. One end of the water supply pipe 228 is fixedly installed inside the processing box 11, and the other end is fixedly connected to the output end of the water pump II229. The input end of the water pump II229 is deep in the storage box II2291.

[0042] A scrubbing head 224 is provided on the outside of the high-pressure nozzle III 223 to scrub the surface of the steel strip with the cleaning liquid sprayed by the high-pressure nozzle III 223 .

[0043] A device for pickling dirty marks on the surface of a wide stainless steel panel, the pickling process steps are as follows:

[0044] 1) Pickling: The steel strip 10 is first soaked and pickled in a pickling tank 13 provided in a treatment box 11 to remove most of the oxide scale. The pickling process comprises a mixed acid first stage and a mixed acid second stage. The mixed acid first stage has an HNO3 concentration of 95 g / L, an HF concentration of 22 g / L, a metal ion concentration of 40 g / L, and a temperature of 47°C. The mixed acid second stage has an HNO3 concentration of 80 g / L, an HF concentration of 20 g / L, a metal ion concentration of 18 g / L, and a temperature of 38°C.

[0045] 2) Acid brushing: The brushing mechanism 21 above the pickling tank 13 is used to brush the surface of the steel strip 10 at high speed to avoid incomplete pickling and the generation of surface black spots. First, the surface monitoring device is used to determine the position of the steel strip 10 to be treated. Then, the rotating brush head 214 is moved to the specified position by adjusting the two sets of screws I 2111 and screw II 2121. Then, according to the size of the area to be treated, the electric telescopic rod II 217 is used to adjust the expansion range of the movable arm 216. The water pump I 2191 pumps the acid stored in the storage box I 2192 through the water pump I 2191. The connecting hose II 219 pumps liquid into the rotating brush head 214 and sprays it out from the high-pressure nozzle I 2143. After being diverted by the telescopic tube 2162, it enters the hollow cavity of the movable arm 216 and is sprayed out through the high-pressure nozzle II 2161. The motor VIII 215 drives the rotating brush head 214 to rotate at high speed through gear meshing, thereby cooperating with the brush 218 and the sprayed pickling liquid to perform a secondary scrubbing on the local area of ​​the surface of the steel strip 10 to avoid black spots and dirty marks caused by incomplete pickling. During the scrubbing process, the speed of the rotating brush head 214 is controlled at 5500 rpm for 2 minutes.

[0046] 3) Acid squeezing: The pickled steel strip 10 passes through the squeezing roller 20 to squeeze out most of the acid on the surface;

[0047] 4) Rinse with clean water: After the steel strip 10 passes through the cleaning tank 14, the cleaning mechanism 22 is used again to clean the residual acid on the surface of the steel strip 10 to prevent the acid from staying on the surface of the steel strip 10 for a long time, causing corrosion and resulting in dirty marks on the surface; the motor IX 2223 drives the eccentric wheel II 2222 to rotate, thereby driving the fixed plate 222 to reciprocate along the guide rod 221 through the connecting rod 2221, and at the same time, the output end gear of the motor X 226 is meshed with the gear on the high-pressure nozzle III 223 to drive the high-pressure nozzle III 223 to rotate, and cooperate with the brush head 224 provided on the outside of the high-pressure nozzle III 223 to reciprocate on the surface of the steel strip 10 following the fixed plate 222, driving the brush head 224 to reciprocate and rotate on the surface of the steel strip 10. Through rotation and reciprocating motion, multi-directional rinsing is performed, thereby achieving a better scrubbing effect and thoroughly rinsing the residual acid on the surface of the steel strip 10;

[0048] 5) Dewatering: After rinsing, the steel strip 10 passes through the drying mechanism 15 provided at one side of the outlet end of the treatment box 11 to clean the residual water stains on the surface of the steel strip 10, so as to avoid watermarks on the surface of the steel strip and affect the surface quality; the water absorption roller 157 is adjusted to fit the surface of the steel strip 10 by the electric telescopic rod Ⅰ 152, and then the gear at the output end of the motor Ⅱ 1571 drives the suction pipe 158 to rotate, thereby driving the water absorption roller 157 to rotate, and the water absorption roller 157 rotates in the direction of the shear head, passes through the guide plate 156 and enters the arc-shaped extrusion plate 1561, and after being squeezed by the arc-shaped extrusion plate 1561, the water absorption roller 15 7 The cleaning water will be accelerated through the water suction hole 1581 on the suction pipe 158, and will be sucked into the collection box 1591 by the negative pressure fan 1592 for temporary storage. During the operation of the water suction roller 157, the motor Ⅰ153 provided at the output end of the motor Ⅰ153 will engage with the guide groove 1542 to drive the sliding plate 154 to reciprocate as a whole, thereby driving the water suction roller 157 to reciprocate on the surface of the steel strip 10, which can avoid the problem that there are too many local water stains that cannot be quickly absorbed. The reciprocating water suction roller 157 can quickly clean the water stains on the surface of the steel strip 10 and avoid watermarks on the surface of the steel strip 10.

[0049] Example 2:

[0050] The difference compared with Example 1 is:

[0051] Step 1) Pickling: The pickling process includes a mixed acid stage and a mixed acid stage; the HNO3 concentration in the mixed acid stage is 110 g / L, the HF concentration is 30 g / L, the metal ion concentration is 37 g / L, and the temperature is 53°C; the HNO3 concentration in the mixed acid stage is 115 g / L, the HF concentration is 18 g / L, the metal ion concentration is 25 g / L, and the temperature is 31°C.

[0052] Step 2) Acid brushing: During the brushing process, the rotation speed of the rotating brush head 214 is controlled to 6700 rpm for 1.5 minutes.

[0053] Example 3:

[0054] The difference compared with Example 1 is:

[0055] Step 2) Acid brushing: During the brushing process, the rotation speed of the rotating brush head 214 is controlled at 1300 rpm for 2.5 minutes.

[0056] Example 4:

[0057] The difference compared with Example 1 is:

[0058] Step 2) Acid brushing: During the brushing process, the rotation speed of the rotating brush head 214 is controlled at 9700 rpm for 2 minutes.

[0059] Example 5:

[0060] The difference compared with Example 1 is:

[0061] Step 1) Pickling: The pickling process includes a mixed acid stage and a mixed acid stage; the mixed acid stage has an HNO3 concentration of 170 g / L, an HF concentration of 62 g / L, a metal ion concentration of 35 g / L, and a temperature of 45°C; the mixed acid stage has an HNO3 concentration of 140 g / L, an HF concentration of 45 g / L, a metal ion concentration of 20 g / L, and a temperature of 40°C.

[0062] Example 6:

[0063] The difference compared with Example 1 is:

[0064] Step 1) Pickling: The pickling process includes a mixed acid stage and a mixed acid stage; the mixed acid stage has an HNO3 concentration of 45 g / L, an HF concentration of 10 g / L, a metal ion concentration of 35 g / L, and a temperature of 45°C; the mixed acid stage has an HNO3 concentration of 35 g / L, an HF concentration of 5 g / L, a metal ion concentration of 20 g / L, and a temperature of 40°C.

[0065] Comparative Example 1: The pickled steel strip was treated by a continuous pickling device for stainless steel strip and its use method according to patent application number 202111141626.0

[0066] Test example: randomly selected steel strips after pickling from Examples 1-6 and Comparative Example 1, randomly cut lengths of 500-1000 mm, and visually inspected the surface of the steel strips. The results are shown in Table 1:

[0067] Table 1:

[0068] Is the surface of the steel belt smooth? Check whether there is any dirt on the surface of the steel belt Example 1 Visually smooth and scratch-free none Example 2 Visually smooth and scratch-free none Example 3 Visually smooth and scratch-free have Example 4 Visual scratches none Example 5 Visually rough surface have Example 6 Visually rough surface have Comparative Example 1 No scratches visible have

[0069] According to the above standards, the appearance quality inspection of the steel strip and the results are as follows:

[0070] The surface inspection results of Example 1 and Example 2 are qualified; there are no scratches, dirt marks or other defects on the surface of the stainless steel strip.

[0071] In Example 3 and Example 4, by changing the rotation speed of the rotating brush head during the scrubbing process, although a high rotation speed can completely clean the dirty marks on the surface of the steel strip, it will leave scratches, and a low rotation speed cannot completely clean the dirty marks on the surface of the steel strip.

[0072] In Examples 5 and 6, the acid concentration during the pickling process was changed. If the acid concentration was too high, the steel strip would be pickled excessively, the surface would be rough, and even holes of a certain depth would appear. If the acid concentration was too low, the steel strip would not be pickled thoroughly, and more oxide scale would remain on the surface, resulting in a rough surface.

[0073] In the pickling process of Comparative Example 1, the steel strip was partially not pickled thoroughly, resulting in dirty marks such as black marks and acid marks on the surface of the steel strip.

[0074] In summary, by adding a brushing mechanism, etc., the pickling liquid can be better cooperated with to thoroughly clean the local oxide scale stacking of the steel strip, avoiding defects such as black spots and dirty marks during the pickling process. At the same time, the cleaning mechanism and the drying mechanism can be used to thoroughly clean and dry the steel strip, avoiding surface defects such as acid marks and watermarks on the steel strip.

[0075] The above content is merely an example and explanation of the structure of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

Claims

1. A device for pickling dirty marks on the surface of a wide stainless steel panel, comprising a processing box, a partition, a pickling tank, a cleaning tank, a drying mechanism, a frame, a driving roller, a supporting roller, a brush roller, a squeezing roller, a brushing mechanism, a cleaning mechanism, a chute, and an overflow hole, characterized in that The processing box is divided into a pickling tank and a cleaning tank by a partition, and a plurality of driving rollers and supporting rollers are provided in the processing box, one end of the driving roller is fixedly connected to the output end of motor III, two groups of brush rollers are provided between the supporting rollers immersed in the acid solution, one end of the brush roller is fixedly connected to the output end of motor IV, a squeezing roller is provided above the partition, one end of the squeezing roller is fixedly connected to the output end of motor V, a steel belt is wound around the driving roller, supporting roller, brush roller and squeezing roller, a chute is provided on the side of the pickling tank, a brushing mechanism is movably installed in the chute, an overflow hole is provided on one side of the cleaning tank, a cleaning mechanism is provided above the cleaning tank, a frame is provided at the outlet end of the processing box, two groups of supporting rollers are provided on the frame, and a drying mechanism is provided between the frame and the processing box; The drying mechanism includes a lifting plate, an electric telescopic rod I, a motor I, an eccentric wheel I, a sliding plate, a slider, a guide groove, a fixed plate, a guide plate, an arc-shaped extrusion plate, a water suction roller, a motor II, a suction pipe, a water suction hole, a rotary joint I, a connecting plate I, a connecting hose I, a collection box, and a negative pressure fan. One end of the electric telescopic rod I is fixedly installed on the frame, and the other end is fixedly connected to the lifting plate. The other side of the lifting plate is engaged and movably connected with the slider provided on the sliding plate. A guide groove is provided on one side of the sliding plate. The inside of the guide groove is engaged and movably installed with one side of the eccentric wheel I. The eccentric wheel I is fixedly installed on the motor Ⅰ output end, motor Ⅰ is fixedly installed on the lifting plate, one side of the sliding plate is connected to the guide plate through a fixed plate, one side of the guide plate is provided with an arc-shaped extrusion plate, a suction pipe is movably installed on the guide plate, a plurality of water suction holes are provided on the suction pipe, and a water suction roller is fixedly wrapped around the outer side of one end with the water suction hole, the gear provided at one end of the suction pipe is meshed and connected with the gear provided at the output end of motor Ⅱ, the other end of the suction pipe is connected to the connecting hose Ⅰ through the rotary joint Ⅰ, the rotary joint Ⅰ is fixedly installed on the sliding plate through the connecting plate Ⅰ, one end of the connecting hose Ⅰ is fixedly connected to the collection box, and one side of the collection box is fixedly connected to the negative pressure fan.

2. The device for pickling dirty marks on the surface of a wide stainless steel panel according to claim 1 is characterized in that The brushing mechanism includes a motor VI, a screw rod I, a limit slider, a screw II, a motor VII, a movable base, a rotating brush head, a rotary joint II, a connecting plate II, a high-pressure nozzle I, a motor VIII, a movable arm, a high-pressure nozzle II, a telescopic tube, an electric telescopic rod II, a brush, a connecting hose II, a water pump I, and a storage box I. The limit slider is meshed and installed on the screw rod I. One end of the screw rod I is movably installed on the side wall of the processing box, and the other end is fixedly connected to the output end of the motor VI. The limit slider is meshed and installed in the slide groove. A screw rod II is movably installed between the two groups of limit sliders. One end of the screw rod II is fixedly connected to the output end of the motor VII. The motor VII is fixedly installed on one side of the limit slider. A movable base is meshed and installed on the screw II. A rotating brush head is movably provided on the movable base. The gears provided on the rotating brush head The wheel is meshed with the gear provided at the output end of the motor VIII. The motor VIII is fixedly installed on one side of the movable base. The interior of the rotating brush head is hollow, and one end is connected to the connecting hose II through a rotating joint II. The rotating joint II is fixedly installed on the movable base through a connecting plate II. The other end of the connecting hose II is fixedly connected to the output end of the water pump I. The input end of the water pump I extends into the storage box I. The bottom of the rotating brush head is fixedly connected to the high-pressure nozzle I. A movable arm is provided around the rotating brush head. One side of the movable arm is movably connected to one end of the electric telescopic rod II. The other end of the electric telescopic rod II is movably installed on the rotating brush head. The hollow cavity on the rotating brush head is fixedly connected to the hollow cavity on the movable arm through a telescopic tube. The high-pressure nozzle II provided at the bottom of the movable arm is connected to the internal hollow cavity. A number of brushes are provided at the rotating brush head and the bottom of the movable arm.

3. The device for pickling dirty marks on the surface of a wide stainless steel panel according to claim 1 is characterized in that The cleaning mechanism includes a guide rod, a fixed plate, a connecting rod, an eccentric wheel II, a motor IX, a high-pressure nozzle III, a rotary joint III, a motor X, a connecting hose III, a water supply pipe, a water pump II, and a storage box II. Both sides of the fixed plate are movably mounted on the guide rod, and both ends of the guide rod are fixedly mounted inside the treatment box. One side of the fixed plate is movably connected to the eccentric wheel II through a connecting rod passing through a groove on the side wall of the treatment box. The eccentric wheel II is fixedly mounted on the output end of the motor IX. The motor IX is fixedly mounted on the treatment box. Several high-pressure nozzles III are movably mounted on the fixed plate. The gears provided on two adjacent high-pressure nozzles III are meshed and installed. The gears provided on one group of high-pressure nozzles III are meshed and connected with the gears provided on the output end of the motor X. The motor X is fixedly mounted on the guide rod. One end of the high-pressure nozzle III is connected to the connecting hose III through the rotary joint III. The rotary joint III is fixedly mounted on the fixed plate. The other end of the connecting hose III is fixedly connected to the water supply pipe. One end of the water supply pipe is fixedly mounted inside the treatment box, and the other end is fixedly connected to the output end of the water pump II. The input end of the water pump II extends into the storage box II.

4. The device for pickling dirty marks on the surface of a wide stainless steel panel according to claim 3 is characterized in that A brush head is provided on the outside of the high-pressure nozzle III, and the cleaning liquid sprayed by the high-pressure nozzle III is used to brush the surface of the steel strip.

5. The device for pickling dirty marks on the surface of a wide stainless steel panel according to claim 1 is characterized in that The pickling process steps are as follows: 1) Pickling: The steel strip is first soaked and pickled in the pickling tank set in the treatment box to remove most of the oxide scale; the pickling process has a mixed acid stage and a mixed acid stage; the mixed acid stage HNO3 concentration is 90-150g / L, HF concentration is 20-40g / L, metal ions are less than 45g / L, and the temperature is 40-55°C; the mixed acid stage HNO3 concentration is 70-125g / L, HF concentration is less than 25g / L, metal ions are less than 35g / L, and the temperature is 30-45°C; 2) Acid brushing: The brushing mechanism above the pickling tank performs high-speed brushing on the surface of the steel strip. First, the surface monitoring device determines the location of the steel strip surface to be treated. Then, the rotating brush head is moved to the designated location by adjusting the two sets of screws I and II. Then, the electric telescopic rod II adjusts the deployment range of the movable arm according to the size of the area to be treated. The water pump I pumps the acid stored in the storage tank I into the rotating brush head through the connecting hose II and sprays it out from the high-pressure nozzle I. After being diverted by the telescopic pipe, it enters the hollow cavity of the movable arm and is sprayed out from the high-pressure nozzle II. The motor VIII drives the rotating brush head to rotate at high speed through gear meshing, thereby cooperating with the brush and the sprayed pickling liquid to perform a secondary brushing on the local area of ​​the steel strip surface. During the brushing process, the rotating brush head speed is controlled at 3500-8500rpm, and the time is controlled at 1-8min. 3) Acid squeezing: The pickled steel strip passes through the squeezing roller to squeeze out most of the acid on the surface; 4) Rinsing with clean water: After the steel strip passes through the cleaning tank, the cleaning mechanism cleans the residual acid on the surface of the steel strip; Motor IX drives eccentric wheel II to rotate, thereby driving the fixed plate to reciprocate along the guide rod through the connecting rod. At the same time, the output gear of Motor X engages with the gear on the high-pressure nozzle III, driving the high-pressure nozzle III to rotate. The brush head installed on the outside of the high-pressure nozzle III also moves back and forth along with the fixed plate on the surface of the steel strip, driving the brush head to reciprocate and rotate on the surface of the steel strip. Through rotation and reciprocating motion, multi-directional rinsing is performed; 5) Water removal: After rinsing, the steel strip passes through the drying mechanism on one side of the outlet end of the processing box to clean the residual water stains on the surface of the steel strip; the water suction roller is adjusted to fit the surface of the steel strip through the electric telescopic rod I, and then the gear transmission at the output end of motor II drives the suction pipe to rotate, thereby driving the water suction roller to rotate. The water suction roller rotates in the direction of the shear head and enters the arc-shaped extrusion plate through the guide plate. After being squeezed by the arc-shaped extrusion plate, the cleaning water in the water suction roller will be accelerated through the water suction hole on the suction pipe and sucked into the collection box by the negative pressure fan for temporary storage. During the operation of the water suction roller, the motor I set at the output end of motor I engages with the guide groove, which will drive the sliding plate to reciprocate as a whole, thereby driving the water suction roller to reciprocate on the surface of the steel strip. The reciprocating water suction roller can quickly remove water stains on the surface of the steel strip.

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