Device and method for eliminating mountain-shaped squamous folding defects on surface of hot-rolled stainless steel

Abstract

The invention discloses a device and method for eliminating mountain-shaped squamous folding defects on the surface of hot-rolled stainless steel. The device comprises a box body, a feeding opening, a discharging opening, a partition plate, a spraying mechanism, a cleaning mechanism, a stirring mechanism, a conveying roller and a pressing roller. The feeding port and the discharging port are located at the two ends of the box body respectively, the partition plate is fixed in the box body and divides the box body into a sulfuric acid pickling pool and a mixed acid pickling pool, and hydrofluoric acid and nitric acid mixed acid liquor is contained in the mixed acid pickling pool; a material passing opening is formed in the partition plate; the multiple conveying rollers are rotationally connected to the side wall of the box body through bearings. The lower compression roller is provided with a pair of box body side walls which are respectively connected to the sulfuric acid pickling tank and the mixed acid pickling tank; the spraying mechanism is mounted in the sulfuric acid pickling tank, and the stirring mechanism is mounted in the mixed acid pickling tank; the cleaning mechanism is located above the lower pressing roller. The mixed acid solution can be uniformly mixed, and uniform acid pickling of the mixed acid solution on the stainless steel surface is further improved; and meanwhile, the mountain-shaped squamous folding defect on the stainless steel surface can be eliminated.

Description

Technical Field

[0001] The invention belongs to the technical field of hot-rolled stainless steel surface treatment, and in particular relates to a device and a method for eliminating mountain-shaped scale-like folding defects on the surface of hot-rolled stainless steel. Background Art

[0002] Stainless steel has local surface unevenness in the early stage of rolling, and repeatedly deforms during the subsequent rolling process to form mountain-shaped scaly defects. The defect is extended in the rolling direction. Pickling can not only remove the oxide scale on the surface of stainless steel, but also effectively eliminate the mountain-shaped scaly folding defects on the surface of ultra-pure ferrite.

[0003] After searching, the prior art publication number CN117702130A is a steel coil pickling device and a pickling method thereof, which includes a pickling tank, a coiling guide mechanism, a floating plate, a protrusion, a fixed plate, and a forming groove; a lifting mechanism for driving the floating plate to move vertically; and the processing process has the following disadvantages: there is only one-level pickling tank, which cannot ensure that the stainless steel coil is thoroughly pickled, and if mixed acid pickling is performed in the pickling tank, the lack of a stirring mechanism during the mixed acid pickling process will affect the uniformity of the mixed acid pickling effect of the stainless steel.

[0004] After searching, the prior art announcement number CN220099194U is a steel strip surface pickling device, which includes a shell, a partition is fixed inside the shell, and the internal space of the shell is divided into a pickling area and a rinsing and drying area by the partition. Three rotating rollers are rotatably installed in the pickling area, and three guide rollers are rotatably installed in the rinsing and drying area. An inlet for the steel strip to pass through is opened on one side wall of the shell; the processing process has the following disadvantages: since the steel strip has a certain width, the iron oxide slag removed by pickling is easy to accumulate at the position of the steel strip and the rotating roller. When more iron oxide slag accumulates on the surface of the steel strip, it will hinder the pickling effect of the acid on the steel strip; and the rotating roller will press part of the oxide scale into the surface of the steel strip, thereby affecting the surface quality of the steel strip. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a device and method for eliminating the mountain-shaped scale-like folding defects on the surface of hot-rolled stainless steel, so that the mixed acid solution can be mixed evenly, further improving the efficiency and uniformity of the mixed acid solution pickling the stainless steel surface; at the same time, it can eliminate the mountain-shaped scale-like folding defects on the stainless steel surface.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A device and method for eliminating mountain-shaped scale-like folding defects on the surface of hot-rolled stainless steel, the specific method steps are:

[0008] 1) Uncoiling: The stainless steel is uncoiled by the uncoiling machine and transported to the annealing device;

[0009] 2) Annealing: annealing stainless steel through annealing equipment;

[0010] 3) Scaling shot blasting: Shot blasting is performed on stainless steel through a shot blasting machine to remove the oxide scale on the strip;

[0011] 4) Pickling: The stainless steel is pickled by the pickling device to remove the oxide scale on the surface of the stainless steel, and at the same time, the mountain-shaped scale folding defects on the surface of the hot-rolled stainless steel can be eliminated; the pickling is divided into two stages, namely sulfuric acid pickling and mixed acid pickling; a. Sulfuric acid pickling: The water pump provides power to pump the pickling liquid through the conduit into the flow tube, and then spray it onto the stainless steel surface through the nozzle on the flow tube, thereby pickling the stainless steel; the sulfuric acid solution flows along the conduit, and when passing through the heating box, the sulfuric acid solution can be heated, thereby improving the pickling efficiency of the sulfuric acid solution on the stainless steel;

[0012] b. Mixed acid pickling: Motor II provides power to drive the transmission rod to rotate, and the transmission rod drives the cone barrel and the transport auger to rotate; the transport auger inside the cone barrel changes the flow direction of the mixed acid solution, and the mixed acid solution flowing along the outer wall of the cone barrel is stirred with the assistance of the side blade of the cone barrel; the mixed acid solution can be mixed evenly, further improving the uniform pickling of the stainless steel surface by the mixed acid solution; sulfuric acid pickling and mixed acid pickling can eliminate the mountain-shaped scale folding defects on the stainless steel surface;

[0013] 5) Cleaning and drying: The pickled stainless steel is cleaned and dried in turn by a cleaning device and a drying device, and the dried stainless steel is curled.

[0014] The pickling device in step 4) includes a box, a feed inlet, a discharge outlet, a partition, a spray brush mechanism, a cleaning mechanism, a stirring mechanism, a transport roller, and a lower pressure roller; the feed inlet and the discharge outlet are respectively located at both ends of the box, and the partition is fixed inside the box, dividing the box into a sulfuric acid pickling tank and a mixed acid pickling tank. The mixed acid pickling tank contains a mixed acid solution of hydrofluoric acid and nitric acid, and an acid adding port is provided on the box; a feed port is provided on the partition; a plurality of transport rollers are provided, which are rotatably connected to the side wall of the box through bearings; a pair of lower pressure rollers are provided, which are respectively connected to the side walls of the sulfuric acid pickling tank and the mixed acid pickling tank; the spray brush mechanism is installed In the sulfuric acid pickling tank, the stirring mechanism is installed in the mixed acid pickling tank; the cleaning mechanism is located above the lower pressure roller; the stainless steel enters the box body from the feed port through the transport roller, and the stainless steel surface is first pickled with sulfuric acid through the spray brush mechanism, and then the stainless steel passes through the feed port on the partition to enter the mixed acid pickling tank for pickling, and at the same time, the stirring mechanism in the mixed acid pickling tank stirs and mixes the mixed acid solution, which can ensure the uniformity of the concentration of the mixed acid solution, further improve the pickling effect of the stainless steel, thereby eliminating the mountain-shaped scale-like folding defects on the stainless steel surface; finally, it is transported out through the discharge port.

[0015] The stirring mechanism is provided with two groups, which are symmetrically fixed on the side wall of the box body; the stirring mechanism includes a fixed frame, a transmission rod, a conical cylinder, a transport auger, and a motor II; the fixed frame is fixed on the inner wall of the box body, and the transmission rod is rotatably connected to one end of the fixed frame close to the bottom of the box body; the transport auger is fixed to the end of the transmission rod away from the fixed frame; a reinforcing rod is fixedly connected to the transmission rod; the conical cylinder passes through the transport auger and the transmission rod and is fixed on the reinforcing rod; the motor II is fixed on the fixed frame, and the output end is connected to one end of the transmission rod; the motor II provides power to drive the transmission rod to rotate, and the transmission rod drives the conical cylinder and the transport auger to rotate; through the transportation of the transport auger, the box body The mixed acid solution near the side wall enters along the large diameter end of the tapered cylinder and is discharged from the small diameter end, thereby changing the flow direction of the mixed acid solution, further mixing the mixed acid solution near the side wall of the box body and the mixed acid solution in the middle, and improving the uniformity of the mixed acid solution; at the same time, the mixed acid solution in the middle flows around along the outer wall of the tapered cylinder, and the flowing mixed acid solution is stirred with the assistance of the side blade of the tapered cylinder, so that the mixed acid solution can be stirred and mixed evenly, further improving the efficiency and uniformity of the mixed acid solution pickling the stainless steel surface; at the same time, the mountain-shaped scale-like folding defects on the stainless steel surface can be eliminated.

[0016] The spray brushing mechanism includes a conduit, a flow tube, a nozzle, a rotary joint, an adjustment plate, an electric push rod I, a heating box, a filter screen, and a water pump; the electric push rod I is rotatably connected to the inner wall at the top of the box; the flow tube is fixed to the side wall of the box; one end of the conduit is connected to the flow tube through a rotary joint, and the other end is connected to the inside of the sulfuric acid liquid at the bottom of the box; the nozzle is provided with a plurality of uniformly fixed on the flow tube; the adjustment plate is fixed on the nozzle and is rotatably connected to the output end of the electric push rod I; the heating box is fixed to the outer side wall of the box, and the filter screen is fixed to one end of the conduit located at the bottom of the box; the water pump It is connected to the conduit; the water pump provides power to draw the pickling liquid through the conduit to the inside of the flow tube, and then sprays it onto the surface of the stainless steel through the nozzle on the flow tube, thereby pickling the stainless steel; the sulfuric acid solution flows along the conduit, and when passing through the heating box, it can heat the sulfuric acid solution, thereby improving the pickling efficiency of the sulfuric acid solution on the stainless steel; the electric push rod I provides power to drive the adjustment plate to rotate, and the adjustment plate drives the flow tube to rotate through the nozzle, thereby adjusting the spray angle of the nozzle; further adjusting the impact force of the sulfuric acid sprayed onto the stainless steel surface can remove the oxide scale of the stainless steel.

[0017] The bottom of the adjusting plate is rotatably connected with a brushing mechanism; the brushing mechanism comprises a connecting plate, a cleaning brush Ⅰ, a cleaning brush Ⅱ, a rotating plate, a connecting rod Ⅰ, a connecting rod Ⅱ, a moving rod Ⅰ, a moving rod Ⅱ, and an electric push rod Ⅱ; the connecting plate is rotatably connected to one end of the adjusting plate through a rotating shaft, and a pair of slide grooves and a pair of connecting grooves are provided on the connecting plate, the slide groove is "T"-shaped and is located at the bottom of the connecting plate, and the connecting groove is located at the top of the connecting plate and is connected to the slide groove; the cleaning brush Ⅰ and the cleaning brush Ⅱ are respectively movably connected in the corresponding slide grooves; the rotating plate is rotatably connected to the end of the connecting plate away from the cleaning brush Ⅰ and the cleaning brush Ⅱ through the rotating shaft; the connecting rod Ⅰ and the connecting rod Ⅱ are symmetrically connected to the two ends of the rotating plate through the rotating shaft; the moving rod Ⅰ and the moving rod Ⅱ are respectively connected to the ends of the connecting rod Ⅰ and the connecting rod Ⅱ away from the rotating plate through the rotating shaft, and one end of the moving rod Ⅰ and the moving rod Ⅱ are respectively connected to the moving rod Ⅰ and the moving rod Ⅱ through the connecting groove; a fixed plate is provided on the side wall of the connecting plate, and the electric push rod Ⅱ is fixed on the fixed plate, and the output end is connected to the moving rod Ⅰ connection; electric push rod Ⅱ provides power to drive moving rod Ⅰ to move, and moving rod Ⅰ drives cleaning brush Ⅰ to move along the slide groove; at the same time, moving rod Ⅰ drives rotating plate to rotate through connecting rod Ⅰ, and rotating plate drives moving rod Ⅱ to move through connecting rod Ⅱ, and moving rod Ⅱ drives cleaning brush Ⅱ to move in the opposite direction; cleaning brush Ⅰ and cleaning brush Ⅱ move in opposite directions along the slide groove, which can cause dislocation between cleaning brush Ⅰ and cleaning brush Ⅱ, so as to fill the gap between the bristles of the brush, and further enable cleaning brush Ⅰ and cleaning brush Ⅱ to brush the steel strip evenly, which can not only clean the oxide scale on the surface of stainless steel, but also prevent the strip defects caused by the gaps between the bristles of the brush after brushing the surface of stainless steel; electric push rod Ⅲ provides power to drive the connecting plate to rotate, and the connecting plate drives cleaning brush Ⅰ and cleaning brush Ⅱ to adjust, so as to brush the stainless steel, further accelerate the pickling efficiency of stainless steel, and eliminate the mountain-shaped scale folding defects on the surface of stainless steel.

[0018] The cleaning mechanism includes a protective cover, a lead screw, a support plate, a motor I, and a cleaning plate; the protective cover is located above the lower pressure roller and fixed on the box body, and a guide groove is provided on the top of the protective cover; a pair of support plates are provided, which are symmetrically fixed at both ends of the protective cover; both ends of the lead screw are rotatably connected to the support plate through bearings; the motor I is fixed on the support plate, and the output end is connected to one end of the lead screw; the cleaning plate is movably connected to the lead screw through a thread, one end of the cleaning plate is connected to the guide groove, and the cleaning plate is arc-shaped and both ends are located on the side walls of the protective cover; the motor I provides power to drive the lead screw to rotate, and the lead screw drives the cleaning plate to move along the guide groove through the thread; the cleaning plate can clean the oxide scale accumulated between the stainless steel and the lower pressure roller; prevent the oxide scale from accumulating too much and scratching the stainless steel surface; and can prevent the accumulated oxide scale from being pressed into the stainless steel surface during the rotation of the lower pressure roller, thereby affecting the surface quality of the stainless steel.

[0019] The adjustment plate is provided with a support frame, on which an electric push rod III is rotatably connected, and the output end of the electric push rod III is connected to the connecting plate; the electric push rod III provides power to drive the connecting plate to rotate, and the connecting plate drives the cleaning brush I and the cleaning brush II to adjust, thereby brushing the stainless steel, further accelerating the pickling efficiency of the stainless steel.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1) Motor II provides power to drive the transmission rod to rotate, and the transmission rod drives the cone barrel and the transport auger to rotate; through the transport auger, the mixed acid solution near the side wall of the box enters along the large diameter end of the cone barrel and is discharged from the small diameter end, thereby changing the flow direction of the mixed acid solution, further mixing the mixed acid solution near the side wall of the box and the mixed acid solution in the middle, and improving the uniformity of the mixed acid solution; at the same time, the mixed acid solution in the middle flows around along the outer wall of the cone barrel, and the flowing mixed acid solution is stirred with the assistance of the side blade of the cone barrel, so that the mixed acid solution can be stirred and mixed evenly, further improving the efficiency and uniformity of the mixed acid solution pickling the stainless steel surface; at the same time, it can eliminate the mountain-shaped scale folding defects on the stainless steel surface;

[0022] 2) Motor I provides power to drive the lead screw to rotate, and the lead screw drives the cleaning plate to move along the guide groove through the thread; the cleaning plate can clean the oxide scale accumulated between the stainless steel and the lower pressure roller, prevent the oxide scale from accumulating too much and scratching the stainless steel surface; and prevent the accumulated oxide scale from being pressed into the stainless steel surface during the rotation of the lower pressure roller, thereby affecting the surface quality of the stainless steel;

[0023] 3) The water pump provides power to pump the pickling liquid into the flow tube through the conduit, and then sprays it onto the stainless steel surface through the nozzle on the flow tube, thereby pickling the stainless steel; the sulfuric acid solution flows along the conduit, and when passing through the heating box, it can heat the sulfuric acid solution, thereby improving the pickling efficiency of the sulfuric acid solution on the stainless steel; the electric push rod I provides power to drive the adjustment plate to rotate, and the adjustment plate drives the flow tube to rotate through the nozzle, thereby adjusting the spray angle of the nozzle; further adjusting the impact force of the sulfuric acid sprayed onto the stainless steel surface can remove the oxide scale of the stainless steel; it can eliminate the mountain-shaped scale folding defects on the stainless steel surface;

[0024] 4) Electric push rod II provides power to drive moving rod I to move, and moving rod I drives cleaning brush I to move along the slide groove; at the same time, moving rod I drives rotating plate to rotate through connecting rod I, and rotating plate drives moving rod II to move through connecting rod II, and moving rod II drives cleaning brush II to move in the opposite direction; cleaning brush I and cleaning brush II move in opposite directions along the slide groove, which can cause misalignment between cleaning brush I and cleaning brush II, so as to fill the gap between the bristles of the brushes, and further enable cleaning brush I and cleaning brush II to brush the steel strip evenly, which can not only clean the oxide scale on the surface of stainless steel, but also prevent the strip defects caused by the gaps between the bristles of the brushes after brushing the stainless steel surface; electric push rod III provides power to drive the connecting plate to rotate, and the connecting plate drives cleaning brush I and cleaning brush II to adjust, so as to brush the stainless steel, further speed up the pickling efficiency of stainless steel, and eliminate the mountain-shaped scale folding defects on the surface of stainless steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Attached Figure 1 It is a schematic diagram of the internal structure of a device and method for eliminating mountain-shaped scale-like folding defects on the surface of hot-rolled stainless steel according to the present invention;

[0026] Attached Figure 2 It is a structural schematic diagram of a spray brushing mechanism in a device and method for eliminating mountain-shaped scale-like folding defects on the surface of hot-rolled stainless steel according to the present invention;

[0027] Attached Figure 3 It is a structural schematic diagram of a brushing mechanism in a device and method for eliminating mountain-shaped scale-like folding defects on the surface of hot-rolled stainless steel according to the present invention;

[0028] Attached Figure 4 It is a structural schematic diagram of a cleaning mechanism in a device and method for eliminating mountain-shaped scale-like folding defects on the surface of hot-rolled stainless steel according to the present invention;

[0029] Attached Figure 5 It is a structural schematic diagram of a stirring mechanism in a device and method for eliminating mountain-shaped scale-like folding defects on the surface of hot-rolled stainless steel according to the present invention;

[0030] Attached Figure 6 This is a schematic diagram of the structure of a device and method for eliminating mountain-shaped scale-like folding defects on the surface of hot-rolled stainless steel according to the present invention. Figure 1 ;

[0031] Attached Figure 7 This is a schematic diagram of the structure of a device and method for eliminating mountain-shaped scale-like folding defects on the surface of hot-rolled stainless steel according to the present invention. Figure 2 ;

[0032] In the figure: 1, box body; 101, acid adding port; 2, feed port; 3, discharge port; 4, partition; 401, feed port; 5, spray brush mechanism; 501, guide tube; 502, flow tube; 503, spray pipe; 504, rotary joint; 505, adjustment plate; 506, electric push rod Ⅰ; 507, brushing mechanism; 5071, connecting plate; 50711, slide groove; 50712, connecting groove; 50713, fixed plate; 5072, cleaning brush Ⅰ; 5073, cleaning brush Ⅱ; 5074, rotating plate; 5075, connecting rod Ⅰ; 5076, connecting rod Ⅱ; 5077, moving rod Ⅰ; 5078, moving rod II; 5079, electric push rod II; 508, heating box; 509, filter screen; 511, water pump; 512, support frame; 513, electric push rod III; 6, cleaning mechanism; 601, protective cover; 6011, guide groove; 602, lead screw; 603, support plate; 604, motor I; 605, cleaning plate; 7, stirring mechanism; 701, fixed frame; 702, transmission rod; 7021, reinforcement rod; 703, conical cylinder; 7031, side blade; 704, transport auger; 705, motor II; 8, transport roller; 9, lower pressure roller; 11, stainless steel. DETAILED DESCRIPTION

[0033] To facilitate the understanding of those skilled in the art, Figure 1-7 , the technical solution of the present invention is further specifically described.

[0034] A device and method for eliminating mountain-shaped scale-like folding defects on the surface of hot-rolled stainless steel, the specific method steps are:

[0035] 1) Uncoiling: The stainless steel is uncoiled by the uncoiling machine and transported to the annealing device;

[0036] 2) Annealing: annealing stainless steel through annealing equipment;

[0037] 3) Scaling shot blasting: Shot blasting is performed on stainless steel through a shot blasting machine to remove the oxide scale on the strip;

[0038] 4) Pickling: The stainless steel is pickled by the pickling device to remove the oxide scale on the surface of the stainless steel and eliminate the mountain-shaped scale-shaped folding defects on the surface of the hot-rolled stainless steel. The pickling is divided into two stages: sulfuric acid pickling and mixed acid pickling. a. Sulfuric acid pickling: The water pump provides power to pump the pickling liquid through the conduit into the flow tube, and then spray it onto the stainless steel surface through the nozzle on the flow tube, thereby pickling the stainless steel. The sulfuric acid solution flows along the conduit and can heat the sulfuric acid solution when passing through the heating box, thereby improving the pickling efficiency of the sulfuric acid solution on the stainless steel.

[0039] b. Mixed acid pickling: Motor II provides power to drive the transmission rod to rotate, and the transmission rod drives the cone barrel and the transport auger to rotate; the transport auger inside the cone barrel changes the flow direction of the mixed acid solution, and the mixed acid solution flowing along the outer wall of the cone barrel is stirred with the assistance of the side blade of the cone barrel; the mixed acid solution can be mixed evenly, further improving the uniform pickling of the stainless steel surface by the mixed acid solution; sulfuric acid pickling and mixed acid pickling can eliminate the mountain-shaped scale folding defects on the stainless steel surface;

[0040] 5) Cleaning and drying: The pickled stainless steel is cleaned and dried in turn by the cleaning device and the drying device, and the dried stainless steel is curled;

[0041] The pickling device in step 4) includes a box 1, a feed port 2, a discharge port 3, a partition 4, a spray brush mechanism 5, a cleaning mechanism 6, a stirring mechanism 7, a transport roller 8, and a lower pressure roller 9; the feed port 2 and the discharge port 3 are respectively located at both ends of the box 1, and the partition 4 is fixed inside the box 1, dividing the box 1 into a sulfuric acid pickling tank and a mixed acid pickling tank. The mixed acid pickling tank contains a mixed acid solution of hydrofluoric acid and nitric acid, and the box 1 is provided with an acid addition port 101; the partition 4 is provided with a feed port 401; a plurality of transport rollers 8 are provided, which are rotatably connected to the side wall of the box 1 through bearings; the lower pressure roller 9 is provided with a pair of rollers connected to the sulfuric acid pickling tank and the mixed acid pickling tank respectively. on the side wall of the box body 1; the brushing mechanism 5 is installed in the sulfuric acid pickling tank, and the stirring mechanism 7 is installed in the mixed acid pickling tank; the cleaning mechanism 6 is located above the lower pressure roller 9; the stainless steel 11 enters the box body 1 from the feed port 2 through the transport roller 8, and firstly, the surface of the stainless steel 11 is pickled with sulfuric acid by the brushing mechanism 5, and then the stainless steel 11 passes through the feed port 401 on the partition 4 and enters the mixed acid pickling tank for pickling, and at the same time, the stirring mechanism in the mixed acid pickling tank stirs and mixes the mixed acid solution, which can ensure the uniformity of the concentration of the mixed acid solution and further improve the pickling effect of the stainless steel; finally, it is transported out through the discharge port 3.

[0042] The stirring mechanism 7 is provided with two groups, which are symmetrically fixed on the side wall of the box body 1; the stirring mechanism 7 includes a fixed frame 701, a transmission rod 702, a conical cylinder 703, a transport auger 704, and a motor II 705; the fixed frame 701 is fixed on the inner wall of the box body 1, and the transmission rod 702 is rotatably connected to the end of the fixed frame 701 close to the bottom of the box body 1; the transport auger 704 is fixed to the end of the transmission rod 702 away from the fixed frame 701; a reinforcing rod 7021 is fixedly connected to the transmission rod 702; the conical cylinder 703 passes through the transport auger 704 and the transmission rod 702 and is fixed on the reinforcing rod 7021, and a side blade 7031 is provided on the outer wall of the conical cylinder 703, which can pickle the mixed acid solution outside the conical cylinder 703; the motor II 705 is fixed on the fixed frame 701, and the output end is connected to one end of the transmission rod 702; the motor II 705 provides The driving force drives the transmission rod 702 to rotate, and the transmission rod 702 drives the conical cylinder 703 and the transport auger 704 to rotate; through the transportation of the transport auger 704, the mixed acid solution near the side wall in the box body 1 enters along the large diameter end of the conical cylinder 703 and is discharged from the small diameter end, thereby changing the flow direction of the mixed acid solution, further mixing the mixed acid solution near the side wall of the box body 1 and the mixed acid solution in the middle, and improving the uniformity of the mixed acid solution; at the same time, the mixed acid solution in the middle flows around along the outer wall of the conical cylinder 703, and the flowing mixed acid solution is stirred with the assistance of the side blade 7031 of the conical cylinder 703, so that the mixed acid solution can be stirred, so that the mixed acid solution can be mixed evenly, further improving the efficiency and uniformity of the mixed acid solution pickling the surface of the stainless steel 11; at the same time, the mountain-shaped scale folding defects on the surface of the stainless steel 11 can be eliminated.

[0043] The spray brush mechanism 5 includes a conduit 501, a flow tube 502, a nozzle 503, a rotary joint 504, an adjustment plate 505, an electric push rod Ⅰ506, a heating box 508, a filter 509, and a water pump 511; the electric push rod Ⅰ506 is rotatably connected to the inner wall at the top of the box body 1; the flow tube 502 is fixed to the side wall of the box body 1; one end of the conduit 501 is connected to the flow tube 502 through a rotary joint 504, and the other end is connected to the inside of the sulfuric acid liquid at the bottom of the box body 1; the nozzle 503 is provided with a plurality of uniformly fixed on the flow tube 502; the adjustment plate 505 is fixed on the nozzle 503 and is rotatably connected to the output end of the electric push rod Ⅰ506; the heating box 508 is fixed to the outer wall of the box body 1, and the filter 509 is fixed to one end of the conduit located at the bottom of the box body 1 ; The water pump 511 is connected to the conduit 501; the water pump 511 provides power to pump the pickling solution through the conduit 501 to the inside of the flow tube 502, and then sprays it onto the surface of the stainless steel 11 through the nozzle 503 on the flow tube 502, thereby pickling the stainless steel 11; the sulfuric acid solution flows along the conduit 501, and when passing through the heating box 508, the sulfuric acid solution can be heated, thereby improving the pickling efficiency of the sulfuric acid solution on the stainless steel 11; the electric push rod I 506 provides power to drive the adjustment plate 505 to rotate, and the adjustment plate 505 drives the flow tube 502 to rotate along the rotating joint 504 through the nozzle 503, thereby adjusting the injection angle of the nozzle 503; further adjusting the impact force of the sulfuric acid sprayed onto the surface of the stainless steel 11 can remove the oxide scale of the stainless steel 11.

[0044] The bottom of the adjusting plate 505 is rotatably connected with a brushing mechanism 507; the brushing mechanism 507 includes a connecting plate 5071, a cleaning brush I 5072, a cleaning brush II 5073, a rotating plate 5074, a connecting rod I 5075, a connecting rod II 5076, a moving rod I 5077, a moving rod II 5078, and an electric push rod II 5079; the connecting plate 5071 is rotatably connected to one end of the adjusting plate 505 through a rotating shaft, and a pair of slide grooves 50711 and a pair of connecting grooves 50712 are provided on the connecting plate 5071, the slide groove 50711 is in a "T" shape and is located at the bottom of the connecting plate 5071, and the connecting groove 50712 is located at the connecting plate 5071. The top of the connecting plate 5071 is connected to the slide groove 50711; the cleaning brush I 5072 and the cleaning brush II 5073 are respectively movably connected in the corresponding slide groove 50711; the rotating plate 5074 is rotatably connected to the end of the connecting plate 5071 away from the cleaning brush I 5072 and the cleaning brush II 5073 through the rotating shaft; the connecting rod I 5075 and the connecting rod II 5076 are respectively symmetrically connected to the two ends of the rotating plate 5074 through the rotating shaft; the moving rod I 5077 and the moving rod II 5078 are respectively connected to the ends of the connecting rod I 5075 and the connecting rod II 5076 away from the rotating plate 5074 through the rotating shaft, and the moving rod I 5077 and the moving rod II 5078 are respectively connected to the ends of the connecting rod I 5075 and the connecting rod II 5076 away from the rotating plate 5074 through the rotating shaft. One end of rod II 5078 passes through the connecting groove 50712 and is connected to the moving rod I 5077 and the moving rod II 5078 respectively; a fixing plate 50713 is provided on the side wall of the connecting plate 5071, and an electric push rod II 5079 is fixed on the fixing plate 50713, and the output end is connected to the moving rod I 5077; the electric push rod II 5079 provides power to drive the moving rod I 5077 to move, and the moving rod I 5077 drives the cleaning brush I 5072 to move along the slide groove 50711; at the same time, the moving rod I 5077 drives the rotating plate 5074 to rotate through the connecting rod I 5075, and the rotating plate 5074 drives the connecting rod II 5076 to The movable moving rod Ⅱ5078 moves, and the movable rod Ⅱ5078 drives the cleaning brush Ⅱ5073 to move in the opposite direction; the cleaning brush Ⅰ5072 and the cleaning brush Ⅱ5073 move in opposite directions along the slide groove, which can cause the cleaning brush Ⅰ5072 and the cleaning brush Ⅱ5073 to be misaligned, so as to fill the gap between the bristles of the brush, and further enable the cleaning brush Ⅰ5072 and the cleaning brush Ⅱ5073 to brush the stainless steel 11 evenly, which can not only clean the oxide scale on the surface of the stainless steel 11, but also prevent the strip defects caused by the gaps between the bristles of the brush after brushing the surface of the stainless steel 11.

[0045] The cleaning mechanism 6 includes a protective cover 601, a lead screw 602, a support plate 603, a motor I 604, and a cleaning plate 605; the protective cover 601 is located above the lower pressure roller and fixed on the box body 1, and a guide groove 6011 is provided on the top of the protective cover 601; a pair of support plates 603 are provided, which are symmetrically fixed at both ends of the protective cover 601; both ends of the lead screw 602 are rotatably connected to the support plate 603 through bearings; the motor I 604 is fixed on the support plate 603, and the output end is connected to one end of the lead screw 602; the cleaning plate 605 is movably connected to the lead screw 602 through a thread, and the cleaning plate One end of 605 is connected to the guide groove 6011, and the cleaning plate 605 is arc-shaped and both ends are located on the side walls of the protective cover 601; the motor I 604 provides power to drive the lead screw 602 to rotate, and the lead screw 602 drives the cleaning plate 605 to move along the guide groove 6011 through the thread; the cleaning plate 605 can clean the oxide scale accumulated between the stainless steel 11 and the lower pressure roller; prevent the oxide scale from accumulating too much and scratching the surface of the stainless steel 11; and prevent the accumulated oxide scale from being pressed into the surface of the stainless steel 11 during the rotation of the lower pressure roller, thereby affecting the surface quality of the stainless steel 11.

[0046] The adjusting plate 505 is provided with a support frame 512, and the support frame 512 is rotatably connected with an electric push rod III 513, and the output end of the electric push rod III 513 is connected to the connecting plate 5071; the electric push rod III 513 provides power to drive the connecting plate 5071 to rotate, and the connecting plate 5071 drives the cleaning brush I 5072 and the cleaning brush II 5073 to adjust, so as to brush the stainless steel 11, further accelerating the pickling efficiency of the stainless steel 11.

[0047] A device and method for eliminating mountain-shaped scale-like folding defects on the surface of hot-rolled stainless steel, the working process is as follows: stainless steel 11 enters the interior of a box body 1 from a feed port 2 through a transport roller 8, firstly, the surface of the stainless steel 11 is pickled with sulfuric acid through a spray brush mechanism 5, and then the stainless steel 11 passes through a feed port 401 on a partition plate 4 and enters a mixed acid pickling tank for pickling, and at the same time, a stirring mechanism in the mixed acid pickling tank stirs and mixes the mixed acid solution, which can ensure the uniformity of the concentration of the mixed acid solution and further improve the pickling effect of the stainless steel; finally, it is transported out through a discharge port 3.

[0048] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described 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 protection scope of the present invention.

Claims

1. A device and method for eliminating mountain-shaped scale-like folding defects on the surface of hot-rolled stainless steel, characterized in that The specific steps are as follows: 1) Uncoiling: The stainless steel is uncoiled by the uncoiling machine and transported to the annealing device; 2) Annealing: annealing stainless steel through annealing equipment; 3) Scaling shot blasting: Shot blasting is performed on stainless steel through a shot blasting machine to remove the oxide scale on the strip; 4) Pickling: The stainless steel is pickled by the pickling device to remove the oxide scale on the surface of the stainless steel, and at the same time, the mountain-shaped scale folding defects on the surface of the hot-rolled stainless steel can be eliminated; the pickling is divided into two stages: sulfuric acid pickling and mixed acid pickling; a. Sulfuric acid pickling: The water pump provides power to pump the pickling liquid into the flow tube through the conduit, and then spray it onto the stainless steel surface through the nozzle on the flow tube, so as to pickle the stainless steel; The sulfuric acid solution flows along the conduit and can be heated when passing through the heating box, thereby improving the pickling efficiency of the sulfuric acid solution on stainless steel; b. Mixed acid pickling: Motor II provides power to drive the transmission rod to rotate, and the transmission rod drives the cone barrel and the transport auger to rotate; the transport auger inside the cone barrel changes the flow direction of the mixed acid solution, and the mixed acid solution flowing along the outer wall of the cone barrel is stirred with the assistance of the side blade of the cone barrel; the mixed acid solution can be mixed evenly, further improving the uniform pickling of the stainless steel surface by the mixed acid solution; sulfuric acid pickling and mixed acid pickling can eliminate the mountain-shaped scale folding defects on the stainless steel surface; 5) Cleaning and drying: The pickled stainless steel is cleaned and dried in turn by the cleaning device and the drying device, and the dried stainless steel is curled; The pickling device in step 4) includes a box, a feed inlet, a discharge outlet, a partition, a spray brush mechanism, a cleaning mechanism, a stirring mechanism, a transport roller, and a lower pressure roller; the feed inlet and the discharge outlet are respectively located at both ends of the box, and the partition is fixed inside the box, dividing the box into a sulfuric acid pickling tank and a mixed acid pickling tank. The mixed acid pickling tank contains a mixed acid solution of hydrofluoric acid and nitric acid, and an acid addition port is provided on the box; a feed port is provided on the partition; a plurality of transport rollers are provided, which are rotatably connected to the side wall of the box through bearings; a pair of lower pressure rollers are provided, which are respectively connected to the side walls of the sulfuric acid pickling tank and the mixed acid pickling tank; the spray brush mechanism is installed in the sulfuric acid pickling tank, and the stirring mechanism is installed in the mixed acid pickling tank; the cleaning mechanism is located above the lower pressure roller.

2. The device and method for eliminating the mountain-shaped scale-like folding defects on the surface of hot-rolled stainless steel according to claim 1, characterized in that There are two groups of stirring mechanisms, which are symmetrically fixed on the side walls of the box; the stirring mechanism includes a fixed frame, a transmission rod, a conical cylinder, a transport auger, and a motor II; the fixed frame is fixed on the inner wall of the box, and the transmission rod is rotatably connected to one end of the fixed frame close to the bottom of the box; the transport auger is fixed to the end of the transmission rod away from the fixed frame; a reinforcing rod is fixedly connected to the transmission rod; the conical cylinder passes through the transport auger and the transmission rod and is fixed on the reinforcing rod, and a side blade is provided on the outer wall of the conical cylinder; the motor II is fixed on the fixed frame, and the output end is connected to one end of the transmission rod.

3. The device and method for eliminating the mountain-shaped scale-like folding defects on the surface of hot-rolled stainless steel according to claim 1, characterized in that The spray brushing mechanism includes a conduit, a flow tube, a nozzle, a rotary joint, an adjusting plate, an electric push rod I, a heating box, a filter screen, and a water pump; the electric push rod I is rotatably connected to the inner wall at the top of the box; the flow tube is fixed to the side wall of the box; one end of the conduit is connected to the flow tube through a rotary joint, and the other end is connected to the inside of the sulfuric acid liquid at the bottom of the box; the nozzle is provided with a plurality of nozzles evenly fixed on the flow tube; the adjusting plate is fixed on the nozzle, and is rotatably connected to the output end of the electric push rod I; the heating box is fixed to the outer side wall of the box, and the filter screen is fixed to one end of the conduit located at the bottom of the box; the water pump is connected to the conduit.

4. The device and method for eliminating the mountain-shaped scale-like folding defects on the surface of hot-rolled stainless steel according to claim 3, characterized in that The bottom of the adjusting plate is rotatably connected with a brushing mechanism; the brushing mechanism comprises a connecting plate, a cleaning brush I, a cleaning brush II, a rotating plate, a connecting rod I, a connecting rod II, a moving rod I, a moving rod II, and an electric push rod II; the connecting plate is rotatably connected to one end of the adjusting plate through a rotating shaft, and a pair of slide grooves and a pair of connecting grooves are provided on the connecting plate, the slide groove is "T"-shaped and is located at the bottom of the connecting plate, and the connecting groove is located at the top of the connecting plate and is connected with the slide groove; the cleaning brush I and the cleaning brush II are respectively movably connected in the corresponding slide grooves; the rotating plate is rotatably connected to the end of the connecting plate away from the cleaning brush I and the cleaning brush II through the rotating shaft; the connecting rod I and the connecting rod II are symmetrically connected to the two ends of the rotating plate through the rotating shaft; the moving rod I and the moving rod II are respectively connected to the ends of the connecting rod I and the connecting rod II away from the rotating plate through the rotating shaft, and one end of the moving rod I and the moving rod II passes through the connecting groove and is connected to the moving rod I and the moving rod II respectively; a fixed plate is provided on the side wall of the connecting plate, the electric push rod II is fixed on the fixed plate, and the output end is connected to the moving rod I.

5. The device and method for eliminating the mountain-shaped scale-like folding defects on the surface of hot-rolled stainless steel according to claim 4, characterized in that A support frame is arranged on the adjusting plate, an electric push rod III is rotatably connected to the support frame, and an output end of the electric push rod III is connected to the connecting plate.

6. The device and method for eliminating the mountain-shaped scale-like folding defects on the surface of hot-rolled stainless steel according to claim 1, characterized in that The cleaning mechanism includes a protective cover, a screw, a support plate, a motor I, and a cleaning plate; the protective cover is located above the lower pressure roller and fixed on the box body, and a guide groove is provided on the top of the protective cover; a pair of support plates are provided, which are symmetrically fixed at both ends of the protective cover; both ends of the screw are rotatably connected to the support plate through bearings; motor I is fixed on the support plate, and the output end is connected to one end of the screw; the cleaning plate is movably connected to the screw through a thread, one end of the cleaning plate is connected to the guide groove, and the cleaning plate is arc-shaped and both ends are located on the side walls of the protective cover.

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