A high-efficiency production device for continuous pickling and rolling of narrow strip steel

Abstract

The present application relates to steel processing technical field, especially to a kind of high-efficiency production device of narrow strip steel continuous pickling continuous rolling, its structure includes the pickling tank for containing pickling solution, both sides in pickling tank are equipped with double roller group for guiding steel strip, the both sides of pickling tank are equipped with with double roller group position corresponding through slot, single-shaft roller for turning and guiding steel strip is equipped in pickling tank, the partition plate of the inner side fixed two ends of pickling tank is spaced from the inner wall of pickling tank, the inner wall of pickling tank is equipped with the disturbance mechanism that cooperates with the bottom of partition plate to realize the one-way flow of pickling solution in pickling tank, the inner side of pickling tank is equipped with the polishing mechanism located in the upper side of partition plate.The device of the present application increases polishing in the process of narrow strip steel pickling, and the thickness of steel strip is self-adaptive polishing, improves pickling efficiency;While under the condition of automatic starting fault, it can realize the isolation of pickling solution and steel strip, reduce the occurrence of over-pickling;While ensuring the turbulent flow of internal pickling solution, so that internal pickling solution and steel strip are uniformly contacted.

Description

Technical Field

[0001] This invention relates to the field of steel processing technology, and in particular to a high-efficiency production apparatus for continuous pickling and rolling of narrow strip steel. Background Technology

[0002] Narrow strip steel is strip steel with a width of less than 650mm. The product is supplied in strips or coils. Because the edge shape of the strip steel after rolling is more suitable for welding than that of the strip steel after slitting, it is mostly used as the billet for welded pipes, metal components and daily necessities. Its processing technology is as follows: uncoiling and feeding, straightening, welding, looper I, pickling, looper II, entering a three or four stand continuous rolling mill, rolling into qualified cold-rolled steel strip of the required thickness, and then passing through exit pinch rolls and flying shear to reach the coiler to coil and package the strip steel.

[0003] In the above processing technology, due to the use of continuous production, special attention needs to be paid to the pickling time, temperature, concentration, turbulence, and contact conditions during pickling. The continuous pickling of strip steel is mainly to remove the iron oxide scale on its surface. In the existing technology, a tension leveling machine is used to break down the iron oxide scale on its surface before pickling, but the implementation method is complicated and the effect is poor, which is not conducive to efficient production. Removing iron oxide scale by pickling and the turbulence of the acid solution requires an extremely long pickling production line and more conditions to meet the turbulence requirements in pickling, which increases the production cost. Summary of the Invention

[0004] To address the problems existing in the background technology, this invention proposes a high-efficiency production device for continuous pickling and rolling of narrow strip steel, which can adaptively adhere to the steel surface to grind iron oxide scale during the pickling process, thereby improving production efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-efficiency production apparatus for continuous pickling and rolling of narrow strip steel includes a pickling tank for holding pickling solution. Double roller sets are provided on both sides of the interior of the pickling tank to guide the steel strip. Through slots corresponding to the positions of the double roller sets are provided on both sides of the pickling tank. A single-axis roller is provided inside the pickling tank to guide and deflect the steel strip. Baffles with their ends spaced apart from the inner wall of the pickling tank are horizontally fixed on the inner side of the pickling tank. A disturbance mechanism is provided on the inner wall of the pickling tank, which, in conjunction with the bottom of the baffles, allows the pickling solution in the pickling tank to flow in one direction.

[0007] The disturbance mechanism includes short shafts rotatably connected to the inner wall of the pickling tank. One end of two short shafts located outside the pickling tank is connected to a drive assembly. The other end of two short shafts located inside the pickling tank is fixed with meshing gears. A multi-cavity housing coaxial with the meshing gear is fixed inside the meshing gear. The multi-cavity housing contains flowing liquid and includes multiple protrusions. A pressure boosting piston is slidably disposed inside the protrusions. A pressure boosting rod is fixed on the pressure boosting piston. One end of the pressure boosting rod passes through the multi-cavity housing and the meshing gear and extends to the outside of the meshing gear. An extension tube is connected to the multi-cavity housing. The extension tube is coaxial with the meshing gear and one end passes through the pickling tank and is fixed with a rotary pipe joint.

[0008] A grinding mechanism is provided inside the pickling tank on the upper side of the partition. The grinding mechanism includes a double-cavity cylinder fixed to one side of the pickling tank. The two cavities of the double-cavity cylinder are connected to a rotary pipe joint through reinforcing tubes. A circular piston is slidably provided in each of the two cavities of the double-cavity cylinder. A sliding circular rod is fixed to one side of the circular piston. A spring is sleeved on the sliding circular rod between the pickling tank and the circular piston. The end of the sliding circular rod passes through the pickling tank and is slidably connected to a grinding component. The grinding component is slidably connected to the pickling tank and the partition through sliding connectors. Magnet assemblies are fixed on both sides of the two grinding components. The opposite faces of the magnet assemblies on the same side of the grinding component have the same magnetism.

[0009] Preferably, the drive assembly includes a gear fixedly sleeved on a short shaft, a servo motor is fixed to one side of the pickling tank, and the output shaft of the servo motor is fixed to the end of any short shaft.

[0010] Preferably, a receiving chamber is provided on one side of the pickling tank, the upper end of the receiving chamber is connected to a hollow column through a first pipe, one side of the hollow column is connected to the pickling tank through a second pipe, a movable rod is provided through the hollow column, the end of the movable rod is fixed to a sealing block for separating the second pipe from the receiving chamber, and the upper side of the receiving chamber is connected to the pickling tank through a vent pipe.

[0011] Preferably, the dual-chamber cylinder is provided with a pressure reduction and buffer mechanism, and the pickling tank is provided with a control mechanism. The control mechanism uses the steel belt conveying conditions as power to control the connection between the receiving chamber and the pickling tank, as well as the working status of the grinding components.

[0012] Preferably, the pressure-reducing buffer mechanism includes two short tubes communicating with the two inner cavities of the double-cavity cylinder. The two short tubes are connected to a buffer chamber. A buffer piston is slidably disposed inside the buffer chamber. A buffer rod is fixedly disposed on one side of the buffer piston, penetrating the inner wall of the buffer chamber. A connecting rod is rotatably connected to the buffer rod. The end of the connecting rod is rotatably connected to the connecting rod 2 via a rotating shaft. A guide wheel is rotatably sleeved on the rotating shaft. The free end of the connecting rod 2 is rotatably connected to a lower extension rod that abuts against the moving rod. A limiting plate fixed to the buffer chamber is sleeved on the lower extension rod.

[0013] Preferably, the control mechanism includes a vacuum structure fixed to one side of the pickling tank. The rotating shaft of the vacuum structure is fixed to the shaft of the single-axis roller. The input end of the vacuum structure is fixedly connected to a single-opening cylinder through a third pipe. A negative pressure piston is slidably provided inside the single-opening cylinder. A limiting rod is fixed to one side of the negative pressure piston. The other end of the limiting rod abuts against the outer circumferential surface of the guide wheel. A rectangular plate fixed to the pickling tank is movably sleeved on the limiting rod. A fixing sleeve is fixedly sleeved on the limiting rod. A spring is provided between the fixing sleeve and the rectangular plate.

[0014] Preferably, a reflux assembly is provided on the upper side of the receiving chamber. The reflux assembly includes a water pump, the input end of which is fixed with a water pumping pipe, and the output end of which is connected to the pickling tank through an output pipe and a one-way valve.

[0015] Preferably, the upper side of the limiting plate is provided with a limiting through groove for the sliding of the lower extension rod, and the lower extension rod is disposed in the limiting groove.

[0016] Preferably, a slider is fixed to the end of the sliding rod, and the slider is slidably connected to a groove that is vertically fixed on the grinding workpiece.

[0017] Preferably, the sliding connector includes a long strip fixed to one side of the two grinding parts that are far apart from each other, and the two sides of the long strip are provided with partition strips that are fixed to the top of the pickling tank or the partition.

[0018] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0019] (1) The steel strip to be pickled is immersed in the pickling solution below the liquid level by the double roller group and single shaft roller to ensure that the steel strip is in complete contact with the pickling solution; the partition is separated by the drive assembly and two meshing parts, so that the pickling solution under the partition can flow unidirectionally under the rotation of the meshing parts, so as to achieve the flow effect of forming a closed loop after separation, so that the concentration in the pickling solution is uniform and the contact conditions with the steel strip are as similar as possible, thereby improving the pickling quality;

[0020] (2) When the two meshing parts mesh with each other, the intermittent extrusion booster rod is realized. When the booster rod is extruded, the booster rod pushes the booster piston, which causes the flowing liquid in the multi-chamber housing to be extruded. Through the transmission action of the flowing liquid, it is transferred to the double-chamber cylinder and pushes the round piston to move. The round piston extrudes the spring and simultaneously pushes the magnet group to move. The spring can automatically return to its state and perform reciprocating motion to complete the grinding.

[0021] (3) Magnet groups are provided on both sides of the grinding parts, and the opposing sides of the magnet groups on the same side of the two grinding parts are magnetic, so as to achieve mutual repulsion. This facilitates the passage of the steel strip between the two grinding parts. Since the steel strip is a magnetic metal, it will be magnetically attracted after the steel strip is placed between the two grinding parts, ensuring the fit between the grinding parts and the steel strip. This adapts to the grinding of steel strips of different thicknesses, which is conducive to the removal of the oxide layer in pickling, and at the same time eliminates the bubbles generated by the acid corrosion of the steel strip body.

[0022] (4) When the single-axis roller rotates normally, the rotation of the single-axis roller causes the negative pressure piston in the single-opening cylinder to slide, and the limiting rod has a limiting effect on the guide wheel, thereby achieving the sealing and blocking of the second pipe in the hollow column, preventing the second pipe from introducing the pickling liquid in the pickling tank into the receiving chamber and causing the liquid level to drop, while ensuring that the buffer piston in the buffer chamber blocks the outflow of the short pipe, ensuring that the disturbance mechanism can stably drive the grinding mechanism to work; when the single-axis roller cannot rotate, after the spring two is reset, the limiting rod releases the restriction on the guide wheel, and the guide wheel and the connecting rod two pressurize the flowing liquid inside the double-cavity cylinder to push the buffer piston, while the thrust generated by the gravity effect of the liquid level in the pickling tank itself pushes the sealing block, causing the pickling liquid in the pickling tank to flow into the receiving chamber, causing the liquid level in the pickling tank to drop, which is used to separate the pickling liquid from the steel strip in the case of belt breakage, machine stop, etc. when the single-axis roller cannot rotate; and keep the pickling liquid in a flowing state to ensure that the pickling liquid concentration is uniform and stable;

[0023] (5) The device has a compact structure, shortens the pickling and grinding production line, realizes continuous pickling, improves pickling quality and grinding efficiency, and achieves high-efficiency production. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0025] Figure 2 for Figure 1 A magnified structural diagram at point A;

[0026] Figure 3 for Figure 1 The front view;

[0027] Figure 4 for Figure 1 Right sectional view;

[0028] Figure 5 for Figure 1 A front sectional view;

[0029] Figure 6 for Figure 1 Partial structural cross-sectional diagram;

[0030] Figure 7 for Figure 6 A magnified structural diagram at point B;

[0031] Figure 8 for Figure 6 Partial structural diagram;

[0032] Figure 9 for Figure 8 A magnified structural diagram at point C;

[0033] Figure 10 for Figure 8 A magnified structural diagram at point D.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Pickling tank; 11. Double roller assembly; 12. Single-shaft roller; 13. Top cover; 14. Partition plate; 15. Through slot;

[0036] 2. Short shaft; 21. Gear; 22. Servo motor; 23. Gear meshing component; 24. Multi-chamber housing; 25. Pressure boosting piston; 26. Pressure boosting rod; 27. Extended tube; 28. Rotary pipe fitting;

[0037] 3. Double-chamber cylinder; 31. Round piston; 32. Sliding round rod; 33. Spring 1; 34. Grinding part; 35. Magnet assembly; 36. Sliding connector; 37. Reinforcing tube;

[0038] 4. Containment chamber; 41. First pipe; 42. Hollow column; 43. Second pipe; 44. Moving rod; 45. Sealing plug; 46. Ventilation pipe;

[0039] 5. Short tube; 51. Buffer chamber; 52. Buffer piston; 53. Buffer rod; 54. Connecting rod one; 55. Connecting rod two; 56. Guide wheel; 57. Lower extension rod; 58. Limiting plate;

[0040] 6. Vacuuming structure; 61. Third tube; 62. Single-opening cylinder; 63. Negative pressure piston; 64. Limiting rod; 65. Rectangular plate; 66. Fixing sleeve; 67. Spring II;

[0041] 7. Recirculation component. Detailed Implementation

[0042] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments. Example 1

[0043] like Figure 1 and Figure 5As shown, the present invention proposes a high-efficiency production device for continuous pickling and rolling of narrow strip steel, including a pickling tank 1 for holding pickling solution. The top of the pickling tank 1 is provided with a top cover 13, which is connected to an external exhaust system to collect the hydrogen chloride gas volatilized from the pickling solution. The pickling tank 1 has double roller groups 11 on both sides for guiding the steel strip. The double roller groups 11 have power drive capability to convey the steel strip. The pickling tank 1 has through slots 15 on both sides corresponding to the positions of the double roller groups 11. The pickling tank 1 has a single-axis roller 12 for guiding the steel strip. The position of the single-axis roller 12 is lower than the position of the double roller groups 11 to ensure that the steel strip is below the liquid level of the pickling solution. The inner side of the pickling tank 1 is horizontally fixed with partitions 14 at both ends spaced apart from the inner wall of the pickling tank 1. The partitions 14 serve to separate the solution in the pickling tank 1 into a ring shape. The inner wall of the pickling tank 1 is provided with a disturbance mechanism, which, together with the bottom of the partitions 14, makes the pickling solution in the pickling tank 1 flow unidirectionally.

[0044] like Figure 4 , 5 8 and Figure 10 As shown, the disturbance mechanism includes short shafts 2 rotatably connected to the inner wall of the pickling tank 1. Two short shafts 2 are located outside the pickling tank 1, with one end connected to a drive assembly. The drive assembly includes gears 21 fixedly sleeved on the short shafts 2. A servo motor 22 is fixed to one side of the pickling tank 1, and the output shaft of the servo motor 22 is fixed to the end of any of the short shafts 2. The servo motor 22 is electrically connected to an external control terminal and controls its start and stop. Meshing gears 23 are fixed to the ends of the two short shafts 2 inside the pickling tank 1. The meshing gears 23 are hollow structures with multiple teeth (specific structural form as shown in the diagram). Figure 5 as well as Figure 8 A multi-cavity housing 24, coaxial with the meshing member 23, is fixed inside the meshing member 23. The multi-cavity housing 24 is a hollow structure and contains a flowing fluid, which in this embodiment is hydraulic oil. The multi-cavity housing 24 includes multiple protruding shells, and a booster piston 25 is slidably disposed inside the protruding shells. The booster piston 25 is slidably connected to the inner wall of the protruding shell and maintains a seal. A booster piston 25 is fixed with one end penetrating through the multi-cavity housing 24 and the meshing member 23 and extending to the outside of the meshing member 23. The pressure rod 26 passes through the multi-cavity housing 24, and there is a gap between the multi-cavity housing 24 to allow air to enter. The pressure rod 26 slides with the toothed part 23 to maintain a seal and prevent pickling liquid from flowing into the toothed part 23. The pressure rod 26 is inserted between adjacent teeth of the toothed part 23. The multi-cavity housing 24 is connected to the extension tube 27, which is coaxial with the toothed part 23 and has one end that passes through the pickling tank 1 and is fixed to the rotary pipe joint 28. The rotary pipe joint 28 can ensure a seal while having the ability to rotate.

[0045] like Figure 5 , 8 and Figure 9As shown, a grinding mechanism is provided on the upper side of the partition 14 inside the pickling tank 1. The grinding mechanism includes a double-cavity cylinder 3 fixed to one side of the pickling tank 1. The double-cavity cylinder 3 is a double-cavity structure with one end open. Both cavities of the double-cavity cylinder 3 are connected to a rotary pipe joint 28 through reinforcing pipes 37. A circular piston 31 is slidably provided in each of the two cavities of the double-cavity cylinder 3. A sliding circular rod 32 is fixed to one side of the circular piston 31. A spring 33 is sleeved on the sliding circular rod 32 between the pickling tank 1 and the circular piston 31. The end of the sliding circular rod 32 passes through the pickling tank 1 and is slidably connected to a grinding component 34. The grinding component 34 is slidably connected to the pickling tank 1 and the partition 14 through a sliding connector 36. The sliding connector 36 includes a long strip fixed to the side of the two grinding components 34 that is away from each other. The two sides of the long strip are provided with partitions fixed to the top of the pickling tank 1 or the partition 14. The grinding component 34 is resistant to acid corrosion. To ensure that the magnet assembly 35 is not corroded by the acidic environment, an anti-corrosion sleeve is fitted on the outside of the magnet assembly 35. Furthermore, the materials of the components directly in contact with the pickling solution inside the pickling tank 1 are all made of acid-resistant materials. A slider is fixed to the end of the sliding rod 32, and the slider is slidably connected to a groove vertically fixed on the grinding piece 34. Through the cooperation of the slider and the groove, the grinding piece 34 can slide freely up and down, limiting its range of motion and adapting to different steel strip thicknesses. Magnet assemblies 35 are fixed to both sides of the two grinding pieces 34. Magnet assemblies 35 on the same side of the two grinding pieces have the same magnetism on opposite surfaces. The magnet assemblies 35 can repel each other without gaps in the steel strip, creating a gap between the two grinding pieces 34 for the steel strip to pass through. With gaps in the steel strip, the magnetic attraction will draw the magnet assemblies 35 together, causing the two grinding pieces 34 to adhere tightly to the steel strip, thus improving grinding efficiency.

[0046] In this embodiment, a sufficient amount of pickling solution is added to the pickling tank 1. The steel strip, which has undergone pre-scale breaking treatment, enters the pickling tank 1 through the slot 15 on the left side of the pickling tank 1. The steel strip is guided through the space between the double roller group 11 on the left side and the underside of the single shaft roller 12, passes between the two grinding parts 34, then passes under the single shaft roller 12 on the right side, passes between the double roller group 11, and then passes through the slot 15 to connect with the equipment in the next step. After passing through the double roller group 11 and the single shaft roller 12, the steel strip is submerged below the level of the pickling solution, ensuring that the steel strip is in complete contact with the pickling solution.

[0047] The pickling solution is separated by a partition 14. In conjunction with the servo motor 22 of the drive assembly, the output shaft of the servo motor 22 drives the short shaft 2 to rotate. The two geared parts 23 fixed at the end of the short shaft 2 mesh with each other, so that the pickling solution under the partition 14 can achieve unidirectional flow under the rotation drive of the geared parts 23. After being separated by the partition 14, a closed loop flow is formed, so that the concentration of the pickling solution is uniform and the contact conditions with the steel strip are as similar as possible, thereby improving the pickling quality.

[0048] Two meshing parts 23 mesh with each other, and while meshing, they intermittently compress the pressure boosting rod 26, pushing the pressure boosting piston 25 to slide against the multi-chamber housing 24. The flowing liquid inside the multi-chamber housing 24 is squeezed by the pressure boosting piston 25, and through the transmission of the flowing liquid, the flowing liquid inside the multi-chamber housing 24 is transported to the double-chamber cylinder 3, and pushes the circular piston 31 inside the double-chamber cylinder 3 to move. The circular piston 31 compresses the spring 33 and simultaneously pushes the magnet group 35 connected by the sliding circular rod 32 to move. Since the spring 33 is elastic, it can automatically return to its state, realizing the reciprocating action of the grinding part 34. Since the grinding part 34 is provided with magnet groups 35 on both sides, and the opposing surfaces of the magnet groups 35 on the same side of the two grinding parts 34 are of the same magnetism, they repel each other. Since the steel strip is a magnetic metal, the steel strip will be magnetically attracted after passing between the two grinding parts 34. The grinding part 34 and the steel strip are tightly attached to each other, realizing the grinding effect, and it can adapt to the grinding of steel strips of different thicknesses, and remove the oxide layer during pickling. Example 2

[0049] like Figure 1 , 2 3 and Figure 6 , 7 As shown, the present invention proposes a high-efficiency production device for continuous pickling and rolling of narrow strip steel. Based on Embodiment 1, this embodiment further includes: a receiving chamber 4 is provided on one side of the pickling tank 1, which can hold the volume of the pickling tank 1 when the standard liquid level is set to the lower side of the partition 14, ensuring that the steel strip does not come into contact with the acid; the upper end of the receiving chamber 4 is connected to a hollow column 42 through a first pipe 41, one side of the hollow column 42 is connected to the pickling tank 1 through a second pipe 43, and a moving rod 44 is provided through the hollow column 42, the end of the moving rod 44 being fixed to separate the second pipe 43 from the receiving chamber 4. The sealing plug 45 connects the upper side of the receiving chamber 4 to the pickling tank 1 via a vent pipe 46. The connection position of the upper end of the vent pipe 46 is higher than the standard liquid level of the pickling solution in the pickling tank 1, ensuring that the gas inside the receiving chamber 4 can be discharged after the pickling solution enters, without polluting the air. The upper side of the receiving chamber 4 is equipped with a reflux assembly 7, which includes a water pump. The input end of the water pump is fixed with a water suction pipe, and the output end of the water pump is connected to the pickling tank 1 via an output pipe and a one-way valve. The reflux assembly 7 can pump the pickling solution in the receiving chamber 4 back into the pickling tank 1 for continued use, facilitating the reuse of the pickling solution.

[0050] like Figure 7 and Figure 9As shown, the double-chamber cylinder 3 is equipped with a pressure-reducing and buffering mechanism. The pressure-reducing and buffering mechanism includes two short pipes 5 that communicate with the two inner cavities of the double-chamber cylinder 3. The two short pipes 5 are connected to a buffer chamber 51. A buffer piston 52 is slidably installed inside the buffer chamber 51. The buffer piston 52 is slidably connected to the buffer chamber 51 and relatively sealed. A buffer rod 53 is fixed to one side of the buffer piston 52 and penetrates the inner wall of the buffer chamber 51. There is a gap between the buffer rod 53 and the buffer chamber 51 to discharge the compressed air. A connecting rod 54 is rotatably connected to the buffer rod 53. The end of the connecting rod 54 is rotatably connected to the connecting rod 55 through a rotating shaft. A guide wheel 56 is rotatably sleeved on the rotating shaft. The free end of the connecting rod 55 is rotatably connected to a lower extension rod 57 that abuts against the moving rod 44. A limiting plate 58 fixed to the buffer chamber 51 is sleeved on the lower extension rod 57. A limiting groove for the lower extension rod 57 to slide is opened on the upper side of the limiting plate 58. The lower extension rod 57 is set in the limiting groove.

[0051] like Figure 7 As shown, a control mechanism is provided on the pickling tank 1. The control mechanism uses the steel belt conveyor as the power control to control the connection between the receiving chamber 4 and the pickling tank 1, as well as the working state of the grinding component. The control mechanism includes a vacuum structure 6 fixed on one side of the pickling tank 1. In this embodiment, the vacuum structure 6 adopts the vacuum part structure of the vacuum machine in the prior art to realize the power source conversion function. The rotating shaft of the vacuum structure 6 is fixed to the shaft of the single shaft roller 12. The input end of the vacuum structure 6 is fixedly connected to the single open cylinder 62 through the third pipe 61. A negative pressure piston 63 is slidably provided in the single open cylinder 62. A limiting rod 64 is fixed on one side of the negative pressure piston 63. The other end of the limiting rod 64 abuts against the outer circumferential surface of the guide wheel 56. A rectangular plate 65 fixed to the pickling tank 1 is movably sleeved on the limiting rod 64. A fixing sleeve 66 is fixedly sleeved on the limiting rod 64. A spring 67 is provided between the fixing sleeve 66 and the rectangular plate 65.

[0052] The limiting rod 64 is provided with a slot, and a pin is inserted into the slot. When the limiting rod 64 restricts the guide wheel 56, the pin is located on the right side of the rectangular plate 65. The pin and the slot are used to limit the position of the guide wheel 56 by the limiting rod 64 when the equipment is started. When the equipment is fully started and in a stable state, the pin can be pulled out.

[0053] The magnitude of the negative pressure generated by the vacuum structure 6 depends on the rotation of the single-axis roller 12, which in turn depends on the conveying speed of the steel belt. During pickling, the steel belt moves at a constant speed, and the negative pressure generated by the vacuum structure 6 is relatively stable. Since the third tube 61 is connected to the outer arc-shaped wall of the single-opening cylinder 62, when the vacuum structure 6 evacuates air from the cavity between the negative pressure piston 63 and the single-opening cylinder 62, the sliding of the negative pressure piston 63 overcomes the elastic force of the second spring 67. When the negative pressure piston 63 moves to the interface with the third tube 61, air from the outside flows into the third tube 61, and the elastic force of the second spring 67 is reset to the leftward movement of the negative pressure piston 63, causing the cavity between the negative pressure piston 63 and the single-opening cylinder 62 to be drawn in air again by the third tube 61. During this continuous process, the negative pressure piston 63 is balanced by forces and remains stationary, thus limiting the movement of the guide wheel 56 by the limit rod 64.

[0054] In this embodiment, when the single-axis roller 12 contacts and rolls with the steel strip and continues to work, the rotation of the single-axis roller 12 causes the negative pressure piston 63 in the single-opening cylinder 62 to slide through the negative pressure of the vacuum structure 6, so that the limiting rod 64 restricts the guide wheel 56, thereby isolating the second pipe 43 in the hollow column 42 by the sealing plug 45, preventing the second pipe 43 from introducing the pickling liquid in the pickling tank 1 into the receiving chamber 4 and causing the liquid level to drop. At the same time, it also ensures that the buffer piston 52 in the buffer chamber 51 blocks the outflow of the short pipe 5, ensuring that the disturbance mechanism can stably drive the grinding mechanism to work.

[0055] When the single-axis roller 12 cannot rotate, the vacuum structure 6, lacking negative pressure, will not be able to keep the limiting rod 64 connected to the negative pressure piston 63 from overcoming the elastic force of the second spring 67 to restrict the guide wheel 56. After being reset by the elastic force of the second spring 67, the limiting rod 64 releases the restriction on the guide wheel 56. After being released from the restriction of the limiting rod 64, the rotatable guide wheel 56 and the connecting rod 55 are pressurized by the flowing liquid inside the double-chamber cylinder 3, which pushes the buffer piston 52. The thrust generated by the gravity of the pickling tank 1 under its own liquid level pushes the sealing plug 45, causing the pickling liquid in the pickling tank 1 to flow into the receiving chamber 4, thereby lowering the liquid level in the pickling tank 1 to below the upper side of the partition 14. This is used to separate the pickling liquid from the steel strip in situations such as belt breakage or machine stoppage when the single-axis roller 12 cannot rotate, and to keep the pickling liquid in a flowing state, ensuring that the concentration of the pickling liquid is uniform and stable.

[0056] The above specific embodiments are merely preferred embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A high-efficiency production apparatus for continuous pickling and rolling of narrow strip steel, characterized in that: The system includes a pickling tank (1), with double roller groups (11) on both sides inside the pickling tank (1), and through slots (15) on both sides corresponding to the positions of the double roller groups (11). A single-axis roller (12) is provided inside the pickling tank (1) to guide the steel strip to turn. A partition (14) with its two ends spaced apart from the inner wall of the pickling tank (1) is fixed horizontally on the inner side of the pickling tank (1). A disturbance mechanism is provided on the inner wall of the pickling tank (1). The disturbance mechanism includes short shafts (2) rotatably connected to the inner wall of the pickling tank (1). One end of each of the two short shafts (2) located outside the pickling tank (1) is connected to a drive assembly fixed to the pickling tank (1). The other end of each of the two short shafts (2) located inside the pickling tank (1) is fixed with meshing gears (23). A multi-cavity housing (24) coaxial with the meshing gear (23) is fixed inside the meshing gear (23). The multi-cavity housing (24) contains a flowing liquid. The cavity housing (24) includes multiple protruding shells, and a booster piston (25) is slidably disposed inside the protruding shells. A booster rod (26) is fixed on the booster piston (25), one end of which passes through the multi-cavity housing (24) and the gear (23) and extends to the outside of the gear (23). An extension tube (27) is connected to the multi-cavity housing (24). The extension tube (27) is coaxial with the gear (23) and one end of which passes through the pickling tank (1) and is fixed with a rotary pipe joint (28). The pickling tank (1) has a grinding mechanism located on the upper side of the partition plate (14) on its inner side. The grinding mechanism includes a double-cavity cylinder (3) fixed to one side of the pickling tank (1). The two cavities of the double-cavity cylinder (3) are connected to a rotary pipe joint (28) respectively through reinforcing pipes (37). A circular piston (31) is slidably installed in each of the two cavities of the double-cavity cylinder (3). A sliding circular rod (32) is fixed to one side of the circular piston (31). A spring (33) is sleeved on the sliding circular rod (32) between the pickling tank (1) and the circular piston (31). The end of the round rod (32) passes through the pickling tank (1) and is slidably connected to the grinding part (34). The grinding part (34) is slidably connected to the pickling tank (1) and the partition (14) respectively through the sliding connector (36). Magnet groups (35) are fixed on both sides of the two grinding parts (34). The magnetic surfaces of the magnet groups on the same side of the grinding parts (34) are the same. The partition is used to separate the parts. The drive assembly and the two geared parts mesh with each other, so that the pickling liquid under the partition can flow unidirectionally under the rotation of the geared parts. When the two geared parts mesh with each other, the intermittent extrusion pressure bar is realized.

2. The high-efficiency production apparatus for continuous pickling and rolling of narrow strip steel according to claim 1, characterized in that: The drive assembly includes a gear (21) fixedly sleeved on a short shaft (2), and a servo motor (22) fixed on one side of the pickling tank (1). The output shaft of the servo motor (22) is fixed to the end of any short shaft (2).

3. The high-efficiency production apparatus for continuous pickling and rolling of narrow strip steel according to claim 2, characterized in that: The pickling tank (1) has a receiving chamber (4) on one side. The upper end of the receiving chamber (4) is connected to a hollow column (42) through a first pipe (41). One side of the hollow column (42) is connected to the pickling tank (1) through a second pipe (43). A moving rod (44) is provided through the hollow column (42). The end of the moving rod (44) is fixed with a sealing plug (45) to separate the second pipe (43) from the receiving chamber (4). The upper side of the receiving chamber (4) is connected to the pickling tank (1) through a vent pipe (46).

4. The high-efficiency production apparatus for continuous pickling and rolling of narrow strip steel according to claim 3, characterized in that: The double-chamber cylinder (3) is provided with a pressure reduction buffer mechanism, and the pickling tank (1) is provided with a control mechanism. The control mechanism uses the steel belt conveying conditions as power to control the connection between the receiving chamber and the pickling tank, as well as the working status of the grinding components.

5. The high-efficiency production apparatus for continuous pickling and rolling of narrow strip steel according to claim 4, characterized in that: The pressure relief and buffer mechanism includes two short tubes (5) that communicate with the two inner cavities of the double-cavity cylinder (3). The two short tubes (5) are connected to the buffer chamber (51). A buffer piston (52) is slidably provided in the buffer chamber (51). A buffer rod (53) is fixedly inserted through the inner wall of the buffer chamber (51) on one side of the buffer piston (52). A connecting rod (54) is rotatably connected to the buffer rod (53). The end of the connecting rod (54) is rotatably connected to the connecting rod (55) through a rotating shaft. A guide wheel (56) is rotatably sleeved on the rotating shaft. The free end of the connecting rod (55) is rotatably connected to a lower extension rod (57) that abuts against the moving rod (44). A limiting plate (58) fixed to the buffer chamber (51) is sleeved on the lower extension rod (57).

6. The high-efficiency production apparatus for continuous pickling and rolling of narrow strip steel according to claim 5, characterized in that: The control mechanism includes a vacuum structure (6) fixed on one side of the pickling tank (1). The rotating shaft of the vacuum structure (6) is fixed to the shaft of the single-axis roller (12). The input end of the vacuum structure (6) is fixedly connected to the single-opening cylinder (62) through the third tube (61). A negative pressure piston (63) is slidably provided inside the single-opening cylinder (62). A limiting rod (64) is fixed on one side of the negative pressure piston (63). The other end of the limiting rod (64) abuts against the outer circumferential surface of the guide wheel (56). A rectangular plate (65) fixed to the pickling tank (1) is movably sleeved on the limiting rod (64). A fixing sleeve (66) is fixedly sleeved on the limiting rod (64). A spring (67) is provided between the fixing sleeve (66) and the rectangular plate (65).

7. The high-efficiency production apparatus for continuous pickling and rolling of narrow strip steel according to claim 3, characterized in that: The upper side of the receiving chamber (4) is provided with a reflux assembly (7), which includes a water pump. The input end of the water pump is fixed with a water pumping pipe, and the output end of the water pump is connected to the pickling tank (1) through an output pipe and a one-way valve.

8. The high-efficiency production apparatus for continuous pickling and rolling of narrow strip steel according to claim 5, characterized in that: The upper side of the limiting plate (58) is provided with a limiting through groove for the sliding of the lower extension rod (57), and the lower extension rod (57) is disposed in the limiting groove.

9. The high-efficiency production apparatus for continuous pickling and rolling of narrow strip steel according to claim 1, characterized in that: The end of the sliding rod (32) is fixed with a slider, which is slidably connected to a groove that is vertically fixed on the grinding part (34).

10. The high-efficiency production apparatus for continuous pickling and rolling of narrow strip steel according to claim 1, characterized in that: The sliding connector (36) includes a long strip fixed to one side of the two grinding parts (34) away from each other, and the two sides of the long strip are provided with partition strips fixed to the top of the pickling tank (1) or the partition (14).

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