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

Abstract

The utility model discloses a device for eliminating mountain-shaped squamous folding defects on the surface of hot-rolled stainless steel. The device comprises a box body, a feeding hole, a discharging hole, a partition plate, a spraying mechanism, a cleaning mechanism, a stirring mechanism, a conveying roller and a lower 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. According to the utility model, a mixed acid solution can be uniformly mixed, so that the stainless steel surface can be uniformly pickled by the mixed acid solution; and meanwhile, the mountain-shaped squamous folding defect on the stainless steel surface can be eliminated.

Description

Technical Field

[0001] This utility model belongs to the field of hot-rolled stainless steel surface treatment technology, and specifically relates to a device for eliminating mountain-shaped scaly fold defects on the surface of hot-rolled stainless steel. Background Technology

[0002] In the early stages of rolling, stainless steel has local surface inhomogeneity, which leads to repeated deformation during subsequent rolling processes, forming mountain-shaped scale defects. These defects extend in a mountain shape along the rolling direction. Pickling can not only remove the oxide scale on the surface of stainless steel, but also effectively eliminate the mountain-shaped scale folding defects on the surface of ultrapure ferrite.

[0003] A search revealed a steel coil pickling device and method with publication number CN117702130A, which includes a pickling tank, a winding guide mechanism, a floating plate, protrusions, a fixed plate, and a forming groove; a lifting mechanism for driving the floating plate to move vertically. However, this process has the following drawbacks: it only has a single-stage pickling tank, which cannot guarantee thorough pickling of the stainless steel coil; furthermore, if mixed acid pickling is performed in the pickling tank, the lack of a stirring mechanism affects the uniformity of the mixed acid, impacting the pickling effect on the stainless steel.

[0004] A search revealed that the existing technology announcement number CN220099194U describes a steel strip surface pickling device, which includes a housing with a partition fixed inside. The internal space of the housing is divided into a pickling zone and a rinsing and drying zone by the partition. Three rotating rollers are rotatably installed in the pickling zone, and three guide rollers are rotatably installed in the rinsing and drying zone. An inlet for the steel strip to pass through is opened on one side wall of the housing. However, this process has the following drawbacks: due to the certain width of the steel strip, the iron oxide scale removed by pickling tends to accumulate at the position between the steel strip and the rotating rollers. When a large amount of iron oxide scale accumulates on the surface of the steel strip, it will hinder the pickling effect of the acid on the steel strip. Moreover, the rotating rollers will press some 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 this invention is to overcome the shortcomings of the prior art and provide a device for eliminating the mountain-shaped scaly fold 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 pickling the stainless steel surface with the mixed acid solution; at the same time, it can eliminate the mountain-shaped scaly fold defects on the surface of stainless steel.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A device for eliminating mountain-shaped scaly fold defects on the surface of hot-rolled stainless steel includes a box body, a feed inlet, a discharge outlet, a partition, a spraying mechanism, a cleaning mechanism, a stirring mechanism, conveying rollers, and a pressure roller. The feed inlet and discharge outlet are located at opposite ends of the box body. The partition is fixed inside the box body, dividing it into a sulfuric acid pickling tank and a mixed acid pickling tank. The mixed acid pickling tank contains a mixture of hydrofluoric acid and nitric acid. The box body has an acid addition port. The partition has a material passage. Several conveying rollers are rotatably connected to the side wall of the box body via bearings. A pair of pressure rollers are respectively connected to the side wall of the box body of the sulfuric acid pickling tank and the mixed acid pickling tank. The spraying mechanism is installed inside the sulfuric acid pickling tank, while the stirring mechanism is installed inside the mixed acid pickling tank. The cleaning mechanism is located above the lower pressure roller. Stainless steel enters the tank through the feed inlet via the conveyor roller. First, the stainless steel surface is pickled with sulfuric acid by the spraying mechanism. Then, the stainless steel passes through the feed inlet on the partition and enters the mixed acid pickling tank for pickling. 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 mixed acid solution concentration and further improve the pickling effect of the stainless steel, thereby eliminating the mountain-shaped scaly fold defects on the surface of the stainless steel. Finally, it is transported out through the discharge outlet.

[0008] The stirring mechanism has two sets, symmetrically fixed to the side wall of the box; the stirring mechanism includes a fixed frame, a transmission rod, a conical cylinder, a conveying auger, and a motor II; the fixed frame is fixed to the inner side wall of the box, and the transmission rod is rotatably connected to one end of the fixed frame near the bottom of the box; the conveying 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 conveying auger and the transmission rod and is fixed to the reinforcing rod; the motor II is fixed to the fixed frame, and its 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 conveying auger to rotate; through the transport of the conveying auger, the box... The mixed acid solution near the side wall enters through the larger diameter end of the conical cylinder and exits through the smaller diameter end, thereby changing the flow direction of the mixed acid solution and further mixing the mixed acid solution near the side wall with the mixed acid solution in the middle, improving the uniformity of the mixed acid solution. At the same time, the mixed acid solution in the middle flows outward along the outer wall of the conical cylinder, and is stirred by the side blades of the conical cylinder, thus stirring the mixed acid solution and making it uniformly mixed, further improving the efficiency and uniformity of pickling the stainless steel surface with the mixed acid solution; at the same time, it can eliminate the mountain-shaped scaly fold defects on the stainless steel surface.

[0009] The spraying mechanism includes a guide tube, a flow pipe, a spray 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 of the top of the box. The flow pipe is fixed to the side wall of the box. One end of the guide tube is connected to the flow pipe via a rotary joint, and the other end is connected to the sulfuric acid solution at the bottom of the box. Several spray nozzles are evenly fixed to the flow pipe. The adjusting plate is fixed to the spray nozzle and rotatably connected to the output end of the electric push rod I. The heating box is fixed to the outer wall of the box, and the filter screen is fixed to the end of the guide tube located at the bottom of the box. The water pump... Connected to the conduit; the water pump provides power to draw the pickling solution through the conduit into the flow tube, 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 it passes through the heating box, it can be heated, 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.

[0010] A brushing mechanism is rotatably connected to the bottom of the adjusting plate. The brushing mechanism includes a connecting plate, cleaning brush I, cleaning brush II, a rotating plate, connecting rod I, connecting rod II, moving rod I, moving rod II, and electric push rod II. The connecting plate is rotatably connected to one end of the adjusting plate via a rotating shaft. The connecting plate has a pair of sliding grooves and a pair of connecting grooves. The sliding grooves are "T"-shaped and located at the bottom of the connecting plate, while the connecting grooves are located at the top of the connecting plate and communicate with the sliding grooves. Cleaning brush I and cleaning brush II are movably connected in their respective sliding grooves. The rotating plate is rotatably connected to the end of the connecting plate away from cleaning brush I and cleaning brush II via a rotating shaft. Connecting rod I and connecting rod II are symmetrically connected to both ends of the rotating plate via rotating shafts. Moving rod I and moving rod II are connected to the ends of connecting rod I and connecting rod II away from the rotating plate via rotating shafts. One end of moving rod I and moving rod II passes through the connecting groove and is connected to moving rod I and moving rod II respectively. A fixed plate is provided on the side wall of the connecting plate, and electric push rod II is fixed on the fixed plate. Its output end is connected to the moving rod. I. Connection; Electric push rod II provides power to move moving rod I, which in turn moves cleaning brush I along the slide groove; simultaneously, moving rod I drives rotating plate through connecting rod I, which in turn drives moving rod II through connecting rod II, which in turn moves cleaning brush II in the opposite direction; the movement of cleaning brush I and cleaning brush II along the slide groove in opposite directions creates misalignment between them, thus filling the gaps between the brush bristles and enabling cleaning brush I and cleaning brush II to evenly brush the steel strip, removing oxide scale from the stainless steel surface and preventing strip-like defects caused by gaps between the brush bristles after brushing; Electric push rod III provides power to rotate connecting plate, which in turn adjusts cleaning brush I and cleaning brush II, thereby brushing the stainless steel, further accelerating the pickling efficiency of stainless steel, and eliminating mountain-shaped scaly fold defects on the stainless steel surface.

[0011] 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 to the housing, with a guide groove on its top. A pair of support plates are symmetrically fixed at both ends of the protective cover. The two ends of the lead screw are rotatably connected to the support plates via bearings. The motor I is fixed to the support plate, with its output end connected to one end of the lead screw. The cleaning plate is movably connected to the lead screw via threads, with one end connected to the guide groove. The cleaning plate is arc-shaped, with both ends located on the sidewalls 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 via threads. The cleaning plate can clean the oxide scale accumulated between the stainless steel and the lower pressure roller, preventing excessive oxide scale buildup that could scratch the stainless steel surface. Furthermore, it can prevent the accumulated oxide scale from being pressed into the stainless steel surface during the rotation of the lower pressure roller, thus affecting the surface quality of the stainless steel.

[0012] The adjustment plate is equipped with a support frame, on which an electric push rod III is rotatably connected. 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 cleaning brush II to adjust, thereby brushing the stainless steel and further accelerating the pickling efficiency of the stainless steel.

[0013] The advantages of this utility model compared with the prior art are as follows:

[0014] 1) Motor II provides power to drive the transmission rod to rotate, which in turn drives the conical cylinder and the conveying auger to rotate. Through the conveying auger, the mixed acid solution near the side wall of the tank enters along the large-diameter end of the conical cylinder and exits from the small-diameter end, thereby changing the flow direction of the mixed acid solution and further mixing the mixed acid solution near the side wall with the mixed acid solution in the middle of the tank, improving the uniformity of the mixed acid solution. At the same time, the mixed acid solution in the middle flows outward along the outer wall of the conical cylinder, and is stirred with the assistance of the side blades of the conical cylinder, thus stirring the mixed acid solution and making it uniformly mixed, further improving the efficiency and uniformity of pickling the stainless steel surface with the mixed acid solution; at the same time, it can eliminate the mountain-shaped scaly fold defects on the stainless steel surface.

[0015] 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 surface of the stainless steel; and prevent the accumulated oxide scale from being pressed into the surface of the stainless steel during the rotation of the lower pressure roller, thereby affecting the surface quality of the stainless steel.

[0016] 3) A water pump provides power to draw the pickling solution through a conduit into the flow tube, and then sprays it onto the stainless steel surface through a nozzle on the flow tube, thus pickling the stainless steel; the sulfuric acid solution flows along the conduit, and when it passes through the heating box, it can be heated, 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; and can eliminate the mountain-shaped scaly fold defects on the surface of stainless steel;

[0017] 4) Electric push rod II provides power to move moving rod I, which in turn moves cleaning brush I along the slide. Simultaneously, moving rod I drives rotating plate via connecting rod I, which in turn drives moving rod II via connecting rod II. Moving rod II then drives cleaning brush II to move in the opposite direction. The movement of cleaning brush I and cleaning brush II along the slide creates a misalignment between them, thus filling the gaps between the brush bristles. This allows cleaning brush I and cleaning brush II to evenly brush the steel strip, removing oxide scale from the stainless steel surface and preventing strip-like defects caused by gaps between the brush bristles after brushing. Electric push rod III provides power to rotate connecting plate, which in turn adjusts cleaning brush I and cleaning brush II, further accelerating the pickling efficiency of stainless steel and eliminating mountain-shaped fold defects on the stainless steel surface. Attached Figure Description

[0018] Appendix Figure 1 This is a schematic diagram of the internal structure of a device for eliminating mountain-shaped scaly fold defects on the surface of hot-rolled stainless steel according to this utility model.

[0019] Appendix Figure 2 This is a schematic diagram of the spraying mechanism in a device for eliminating mountain-shaped scaly fold defects on the surface of hot-rolled stainless steel according to this utility model.

[0020] Appendix Figure 3 This is a schematic diagram of the brushing mechanism in a device for eliminating mountain-shaped scaly fold defects on the surface of hot-rolled stainless steel according to this utility model.

[0021] Appendix Figure 4 This is a schematic diagram of the cleaning mechanism in a device for eliminating mountain-shaped scaly fold defects on the surface of hot-rolled stainless steel according to this utility model.

[0022] Appendix Figure 5 This is a schematic diagram of the stirring mechanism in a device for eliminating mountain-shaped scaly fold defects on the surface of hot-rolled stainless steel according to this utility model.

[0023] Appendix Figure 6This is a schematic diagram of the structure of a device for eliminating mountain-shaped scaly fold defects on the surface of hot-rolled stainless steel according to this utility model. Figure 1 ;

[0024] Appendix Figure 7 This is a schematic diagram of the structure of a device for eliminating mountain-shaped scaly fold defects on the surface of hot-rolled stainless steel according to this utility model. Figure 2 ;

[0025] In the diagram: 1. Box body; 101. Acid inlet; 2. Feed inlet; 3. Discharge outlet; 4. Baffle plate; 401. Feed outlet; 5. Spraying mechanism; 501. Guide tube; 502. Flow tube; 503. Spray pipe; 504. Rotary joint; 505. Adjusting plate; 506. Electric push rod I; 507. Brushing mechanism; 5071. Connecting plate; 50711. Slide groove; 50712. Connecting groove; 50713. Fixing 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. Reinforcing rod; 703. Conical cylinder; 7031. Side blade; 704. Conveying auger; 705. Motor II; 8. Conveying roller; 9. Lower pressure roller; 11. Stainless steel. Detailed Implementation

[0026] To facilitate understanding by those skilled in the art, the following is in conjunction with the appendix. Figure 1-7 The technical solution of this utility model will be further described in detail below.

[0027] A device for eliminating mountain-shaped scaly fold defects on the surface of hot-rolled stainless steel includes a housing 1, an inlet 2, an outlet 3, a partition 4, a spraying mechanism 5, a cleaning mechanism 6, a stirring mechanism 7, conveying rollers 8, and a pressure roller 9. The inlet 2 and outlet 3 are located at opposite ends of the housing 1. The partition 4 is fixed inside the housing 1, dividing the housing 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. The housing 1 is provided with an acid addition port 101. The partition 4 is provided with a material passage port 401. Several conveying rollers 8 are provided and rotatably connected to the side wall of the housing 1 via bearings. A pair of pressure rollers 9 are respectively connected to the sulfuric acid pickling tank. The tank 1 of the mixed acid pickling tank is located on the side wall of the tank body 1; the spray brush mechanism 5 is installed in the sulfuric acid pickling tank, while 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 tank body 1 through the feed port 2 via the transport roller 8, and firstly, the surface of the stainless steel 11 is pickled with sulfuric acid by the spray brush mechanism 5. Then, the stainless steel 11 passes through the feed port 401 on the partition 4 and enters the mixed acid pickling tank for pickling. 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 mixed acid solution concentration and further improve the pickling effect of the stainless steel; finally, it is transported out through the discharge port 3.

[0028] The stirring mechanism 7 has two sets, symmetrically fixed on the side wall of the housing 1; the stirring mechanism 7 includes a fixed frame 701, a transmission rod 702, a conical cylinder 703, a conveying auger 704, and a motor II 705; the fixed frame 701 is fixed to the inner side wall of the housing 1, and the transmission rod 702 is rotatably connected to one end of the fixed frame 701 near the bottom of the housing 1; the conveying 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 conveying auger 704 and the transmission rod 702 and is fixed to the reinforcing rod 7021, and a side blade 7031 is provided on the outer side wall of the conical cylinder 703, which can perform acid washing on the mixed acid solution on the outside of the conical cylinder 703; the motor II 705 is fixed to the fixed frame 701, and its output end is connected to one end of the transmission rod 702; the motor II 705 provides The power source drives the transmission rod 702 to rotate, which in turn drives the conical cylinder 703 and the conveying auger 704 to rotate. Through the conveying auger 704, the mixed acid solution near the side wall inside the housing 1 enters along the large-diameter end of the conical cylinder 703 and exits from the small-diameter end, thus changing the flow direction of the mixed acid solution. This further mixes the mixed acid solution near the side wall of the housing 1 with the mixed acid solution in the middle, improving the uniformity of the mixed acid solution. Simultaneously, the mixed acid solution in the middle flows outwards along the outer wall of the conical cylinder 703, and is stirred by the side blades 7031 of the conical cylinder 703. This stirring ensures uniform mixing of the mixed acid solution, further improving the efficiency and uniformity of pickling the stainless steel 11 surface with the mixed acid solution. It also eliminates the mountain-shaped scaly fold defects on the surface of the stainless steel 11.

[0029] The spraying mechanism 5 includes a conduit 501, a flow pipe 502, a spray pipe 503, a rotary joint 504, an adjusting plate 505, an electric push rod I 506, a heating box 508, a filter screen 509, and a water pump 511. The electric push rod I 506 is rotatably connected to the inner wall of the top of the box 1. The flow pipe 502 is fixed to the side wall of the box 1. One end of the conduit 501 is connected to the flow pipe 502 through the rotary joint 504, and the other end is connected to the inside of the sulfuric acid solution at the bottom of the box 1. The spray pipe 503 has several evenly fixed parts on the flow pipe 502. The adjusting plate 505 is fixed to the spray pipe 503 and is rotatably connected to the output end of the electric push rod I 506. The heating box 508 is fixed to the outer wall of the box 1, and the filter screen 509 is fixed to the end of the conduit located at the bottom of the box 1. A water pump 511 is connected to a conduit 501. The water pump 511 provides power to draw the pickling solution through the conduit 501 into the flow pipe 502, and then sprays it onto the surface of the stainless steel 11 through the nozzle 503 on the flow pipe 502, thereby pickling the stainless steel 11. The sulfuric acid solution flows along the conduit 501 and is heated when passing through the heating box 508, thereby improving the pickling efficiency of the sulfuric acid solution on the stainless steel 11. An electric push rod I 506 provides power to drive the adjusting plate 505 to rotate. The adjusting plate 505 drives the flow pipe 502 to rotate along the rotary joint 504 through the nozzle 503, thereby adjusting the spray angle of the nozzle 503. The impact force of the sulfuric acid sprayed onto the surface of the stainless steel 11 is further adjusted, which can remove the oxide scale of the stainless steel 11.

[0030] The bottom of the adjusting plate 505 is rotatably connected to a brushing mechanism 507; the brushing mechanism 507 includes a connecting plate 5071, cleaning brush I 5072, cleaning brush II 5073, a rotating plate 5074, connecting rod I 5075, connecting rod II 5076, moving rod I 5077, moving rod II 5078, and electric push rod II 5079; the connecting plate 5071 is rotatably connected to one end of the adjusting plate 505 via a rotating shaft, and the connecting plate 5071 is provided with a pair of sliding grooves 50711 and a pair of connecting grooves 50712. The sliding grooves 50711 are T-shaped and located at the bottom of the connecting plate 5071, and the connecting grooves 50712 are located at the bottom of the adjusting plate 505. The top of the connecting plate 5071 is connected to the slide groove 50711; cleaning brush I 5072 and cleaning brush II 5073 are movably connected in their respective slide grooves 50711; the rotating plate 5074 is rotatably connected to the end of the connecting plate 5071 away from cleaning brush I 5072 and cleaning brush II 5073 via a rotating shaft; connecting rod I 5075 and connecting rod II 5076 are symmetrically connected to both ends of the rotating plate 5074 via rotating shafts; moving rod I 5077 and moving rod II 5078 are connected to the ends of connecting rod I 5075 and connecting rod II 5076 away from the rotating plate 5074 via rotating shafts, respectively. One end of rod II 5078 passes through connecting groove 50712 and is connected to moving rod I 5077 and moving rod II 5078 respectively; a fixed plate 50713 is provided on the side wall of connecting plate 5071, and electric push rod II 5079 is fixed on fixed plate 50713, with its output end connected to moving rod I 5077; electric push rod II 5079 provides power to drive moving rod I 5077 to move, and moving rod I 5077 drives cleaning brush I 5072 to move along slide groove 50711; at the same time, moving rod I 5077 drives rotating plate 5074 to rotate through connecting rod I 5075, and rotating plate 5074 drives rotating plate II 5076 to rotate through connecting rod II 5076. The movable rod II 5078 moves, which drives the cleaning brush II 5073 to move in the opposite direction. The cleaning brush I 5072 and the cleaning brush II 5073 move in opposite directions along the slide groove, which can cause misalignment between the cleaning brush I 5072 and the cleaning brush II 5073. This can fill the gaps between the brush bristles, and further enable the cleaning brush I 5072 and the cleaning brush II 5073 to evenly brush the stainless steel 11. This can not only remove the oxide scale on the surface of the stainless steel 11, but also prevent strip defects caused by gaps between the brush bristles after brushing the surface of the stainless steel 11.

[0031] 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 to the housing 1, and a guide groove 6011 is provided on the top of the protective cover 601. A pair of support plates 603 are symmetrically fixed at both ends of the protective cover 601. The two ends of the lead screw 602 are rotatably connected to the support plate 603 via bearings. The motor I 604 is fixed to the support plate 603, and its output end is connected to one end of the lead screw 602. The cleaning plate 605 is movably connected to the lead screw 602 via threads. One end of the cleaning plate 605 is connected to the guide groove 6011, and the two ends of the cleaning plate 605 are located on the side wall of the protective cover 601. The motor I 604 provides power to drive the lead screw 602 to rotate. 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. It can prevent the oxide scale from accumulating too much and scratching the surface of the stainless steel 11. It can also 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.

[0032] The adjusting plate 505 is provided with a support frame 512, and an electric push rod III 513 is rotatably connected to the support frame 512. 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. The connecting plate 5071 drives the cleaning brush I 5072 and the cleaning brush II 5073 to be adjusted, thereby brushing the stainless steel 11 and further accelerating the pickling efficiency of the stainless steel 11.

[0033] A device for eliminating mountain-shaped scaly fold defects on the surface of hot-rolled stainless steel operates as follows: Stainless steel 11 enters the box 1 through the feed inlet 2 via the conveyor roller 8. First, the surface of stainless steel 11 is pickled with sulfuric acid by the spray brush mechanism 5. Then, stainless steel 11 passes through the feed port 401 on the partition plate 4 and enters the mixed acid pickling tank for pickling. 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 mixed acid solution concentration and further improve the pickling effect of stainless steel. Finally, it is discharged through the discharge port 3.

[0034] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A device for eliminating mountain-shaped scaly fold defects on the surface of hot-rolled stainless steel, comprising a housing, an inlet, an outlet, a partition, a spraying mechanism, a cleaning mechanism, a stirring mechanism, a conveying roller, and a pressing roller; characterized in that... The inlet and outlet are located at opposite ends of the tank. A partition is fixed inside the tank, dividing it into a sulfuric acid pickling tank and a mixed acid pickling tank. The mixed acid pickling tank contains a mixture of hydrofluoric acid and nitric acid. An acid addition port is provided on the tank. A material passage is provided on the partition. Several conveyor rollers are provided and are rotatably connected to the side wall of the tank via bearings. A pair of lower pressure rollers are respectively connected to the side wall of the sulfuric acid pickling tank and the mixed acid pickling tank. A spray brush mechanism is installed inside the sulfuric acid pickling tank, while a stirring mechanism is installed inside the mixed acid pickling tank. A cleaning mechanism is located above the lower pressure rollers. The spraying mechanism includes a conduit, a flow pipe, a spray 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 of the top of the box. The flow pipe is fixed to the side wall of the box. One end of the conduit is connected to the flow pipe via a rotary joint, and the other end is connected to the inside of the sulfuric acid solution at the bottom of the box. Several spray nozzles are evenly fixed to the flow pipe. The adjusting plate is fixed to the spray nozzle and rotatably connected to the output end of the electric push rod I. The heating box is fixed to the outer wall of the box, and the filter screen is fixed to the end of the conduit located at the bottom of the box. The water pump is connected to the conduit. A brushing mechanism is rotatably connected to the bottom of the adjusting plate. The brushing mechanism includes a connecting plate, cleaning brush I, cleaning brush II, a rotating plate, connecting rod I, connecting rod II, moving rod I, moving rod II, and electric push rod II. The connecting plate is rotatably connected to one end of the adjusting plate via a rotating shaft. The connecting plate has a pair of sliding grooves and a pair of connecting grooves. The sliding grooves are "T"-shaped and located at the bottom of the connecting plate, while the connecting grooves are located at the top of the connecting plate and communicate with the sliding grooves. Cleaning brush I and cleaning brush II are movably connected in their respective sliding grooves. The rotating plate is rotatably connected to the end of the connecting plate away from cleaning brush I and cleaning brush II via a rotating shaft. Connecting rod I and connecting rod II are symmetrically connected to both ends of the rotating plate via rotating shafts. Moving rod I and moving rod II are connected to the ends of connecting rod I and connecting rod II away from the rotating plate via rotating shafts. One end of moving rod I and moving rod II passes through the connecting groove and is connected to moving rod I and moving rod II respectively. A fixed plate is provided on the side wall of the connecting plate, and electric push rod II is fixed on the fixed plate, with its output end connected to moving rod I.

2. The device for eliminating mountain-shaped scaly fold defects on the surface of hot-rolled stainless steel according to claim 1, characterized in that... The mixing mechanism has two sets, symmetrically fixed on the side wall of the box; the mixing mechanism includes a fixed frame, a transmission rod, a conical cylinder, a conveying auger, and a motor II; the fixed frame is fixed on the inner side wall of the box, and the transmission rod is rotatably connected to the end of the fixed frame near the bottom of the box; the conveying auger is fixed on 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 conveying auger and the transmission rod and is fixed on the reinforcing rod, and a side blade is provided on the outer side wall of the conical cylinder; the motor II is fixed on the fixed frame, and its output end is connected to one end of the transmission rod.

3. The device for eliminating mountain-shaped scaly fold defects on the surface of hot-rolled stainless steel according to claim 1, characterized in that... The adjustment plate is equipped with a support frame, and an electric push rod III is rotatably connected to the support frame. The output end of the electric push rod III is connected to the connecting plate.

4. The device for eliminating mountain-shaped scaly fold defects on the surface of hot-rolled stainless steel according to claim 1, characterized in that... 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 to the housing, with a guide groove on the top of the protective cover. There is a pair of support plates, symmetrically fixed at both ends of the protective cover. The two ends of the lead screw are rotatably connected to the support plate through bearings. The motor I is fixed to the support plate, and its output end is connected to one end of the lead screw. The cleaning plate is movably connected to the lead screw through threads, with one end of the cleaning plate connected in the guide groove. The cleaning plate is arc-shaped, with both ends located on the side wall of the protective cover.

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