A vibration-assisted hot-dip galvanized steel strip dynamic pickling apparatus

Abstract

The utility model belongs to the field of hot galvanizing steel strip cleaning, disclose a kind of dynamic pickling equipment of vibration auxiliary hot galvanizing steel strip, including mounting bracket, adapter roller, multiple sets of cleaning cylinder, pickling tank, excitation motor and manipulator jaw.Mounting bracket is separately arranged with pickling tank, excitation motor is set in pickling tank bottom and rotor part of excitation motor is fixedly connected pickling tank and outputs axial excitation force to drive pickling tank vertical vibration.Oxide skin, rust layer etc. on the surface of steel strip can be vibrated and broken, and acid solution is diffused into oxide skin or dense rust layer, so that pickling is more sufficient.Manipulator jaw acts on the steel strip section between pickling tank and cleaning cylinder and the steel strip section between pickling tank and adapter roller, for clamping steel strip when pickling tank vibrates, so that the steel strip of cleaning cylinder section and the steel strip of adapter roller section are kept in tension state.The utility model can fully pickling steel strip, and reduces pickling time.The utility model is suitable for all scenes needing to pickling steel strip.

Description

Technical Field

[0001] This utility model belongs to the field of hot-dip galvanized steel strip cleaning, specifically a vibration-assisted dynamic pickling equipment for hot-dip galvanized steel strip. Background Technology

[0002] The manufacturing process of hot-dip galvanized steel strip involves immersing the steel strip in molten zinc, causing a chemical reaction between the zinc and the steel strip surface to form a dense coating that improves the corrosion resistance of the steel strip. Before hot-dip galvanizing, the steel strip needs to be pickled to remove oxide scale, rust, or other impurities from its surface.

[0003] Utility model patent CN222729905U discloses a continuous cleaning device for hot-dip galvanized steel strips, including a mounting wall, steel strips, an acid immersion tank, a cleaning roller, and a spray system. In use, the steel strips are statically immersed in the acid immersion tank. After immersion, the steel strips leave the tank and are then cleaned by the cleaning roller and spray system to remove acid and residue from their surface.

[0004] However, the above-mentioned static immersion method has obvious drawbacks: large oxide scale or dense rust layer on the surface of the steel strip will hinder the diffusion of acid into its interior, resulting in long pickling time and insufficient pickling. Utility Model Content

[0005] The present invention aims to provide a vibration-assisted dynamic pickling equipment for hot-dip galvanized steel strips to solve the problem in the prior art where large particles of oxide scale or dense rust layer on the surface of the steel strip affect the pickling effect.

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

[0007] A vibration-assisted dynamic pickling device for hot-dip galvanized steel strip includes a mounting frame, a transfer roller, multiple sets of cleaning rollers, a drive assembly, a pickling tank, an excitation motor, a robotic gripper, and a control system.

[0008] The transfer roller and multiple sets of cleaning rollers are rotatably mounted on the mounting frame, and the multiple sets of cleaning rollers are driven by a drive assembly.

[0009] The exciter motor is located at the bottom of the pickling tank. The exciter motor includes a stator and a mover. The stator is coaxially sleeved on the outer periphery of the mover. The mover is fixedly connected to the pickling tank and outputs axial excitation force to drive the pickling tank to vibrate vertically.

[0010] The robotic gripper has two grippers. The working end of one gripper acts on the steel strip section between the pickling tank and the cleaning drum, while the working end of the other gripper acts on the steel strip section between the pickling tank and the transfer roller.

[0011] The signal output terminal of the control system is connected to the signal input terminal of the excitation motor, and the signal output terminal of the control system is connected to the signal input terminal of the robotic gripper.

[0012] As a limitation of this utility model: four vibration motors are provided, and the moving parts of the four vibration motors are all fixedly connected to the bottom of the pickling tank. Two of the vibration motors are symmetrically arranged along the length direction of the pickling tank, and the other two vibration motors are symmetrically arranged along the width direction of the pickling tank.

[0013] As a further limitation of this utility model, it also includes a support plate, on which the stators of the four excitation motors are all fixedly mounted.

[0014] As another limitation of this utility model: the central axis of the cleaning roller is set at an angle to the horizontal direction, and on the vertical projection plane where the width of the pickling tank is located, the vertical distance between the free end of the cleaning roller and the ground is less than the vertical distance between the fixed end of the cleaning roller and the ground; the central axes of the transfer roller and the cleaning roller are parallel.

[0015] As a further limitation of this utility model: the angle between the central axis of the cleaning roller and the horizontal direction is 20°.

[0016] As a further limitation of this utility model: each set of cleaning rollers includes a first roller and a second roller corresponding to each other, and there is a gap between the first roller and the second roller for the steel strip to pass through; the free end of the second roller and the free end of the transfer roller are both fixed with a limiting plate for abutting the outer edge of the steel strip.

[0017] As a further limitation of this utility model: the mounting frame is hollow inside, and on the vertical projection plane where the width of the pickling tank is located, the mounting frame has an inverted trapezoidal structure, and the transfer roller and multiple sets of cleaning rollers are rotatably arranged on the inclined side of the mounting frame.

[0018] As a further limitation of this utility model: the drive assembly is disposed inside the mounting bracket, and the drive assembly includes a motor, a synchronous belt, multiple pulleys, multiple first gears and multiple second gears;

[0019] Each first roller has a first gear fixedly mounted on its shaft, and each second roller has a second gear fixedly mounted on its shaft. The corresponding first and second gears mesh and drive each other. Each second roller has a pulley fixedly mounted on its shaft, and a synchronous belt is mounted on multiple pulleys. The output shaft of the motor is fixedly connected to the shaft of one of the second rollers.

[0020] By adopting the above technical solution, the beneficial effects achieved by this utility model compared with the prior art are as follows:

[0021] This utility model includes a mounting frame, a transfer roller, multiple sets of cleaning rollers, an acid pickling tank, a vibrating motor, and a robotic gripper. The mounting frame is separately installed from the acid pickling tank. The vibrating motor is located at the bottom of the acid pickling tank, and its moving part is fixedly connected to the acid pickling tank, outputting axial excitation force to drive the acid pickling tank to vibrate vertically. In practice, when the steel strip is immersed in the acid pickling tank, the vibrating motor applies excitation force to the acid pickling tank, causing it to vibrate vertically. The acid in the acid pickling tank generates a certain impact force on the steel strip during vibration, which can break up the oxide scale and rust layer on the surface of the steel strip, making it easier for the acid to diffuse into the interior of the oxide scale or dense rust layer, and fully react with the oxide scale or dense rust layer on the steel strip, making the acid pickling more thorough.

[0022] The robotic grippers operate on the steel strip sections between the pickling tank and the cleaning drum, as well as between the pickling tank and the transfer rollers. When the pickling tank vibrates vertically, the guide rollers installed inside the tank also vibrate. At this time, the guide rollers cannot maintain tension on the steel strip. To avoid affecting the steel strip in the cleaning drum and transfer roller sections, the robotic grippers clamp the steel strip while the pickling tank vibrates. The steel strip between the two robotic grippers is loose, but the steel strips in the cleaning drum and transfer roller sections remain taut, ensuring the normal operation of the entire production line. After pickling is complete, the pickling tank resets, the guide rollers tighten the steel strip, and the robotic grippers release the steel strip, allowing for normal conveying.

[0023] In summary, this invention enables thorough pickling of steel strips, reducing pickling time; this invention is applicable to all scenarios requiring pickling of steel strips. Attached Figure Description

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] Figure 1 This is a schematic diagram of the main structure of an embodiment of the present utility model;

[0026] Figure 2 This is a schematic diagram of the main structure of an embodiment of the present utility model (the limiting plate is not shown).

[0027] Figure 3 This is a front view of the internal structure of the pickling tank in an embodiment of this utility model;

[0028] Figure 4 This is a side view of an embodiment of the present utility model.

[0029] In the diagram: 1-Transfer roller, 2-First set of cleaning rollers, 3-Second set of cleaning rollers, 4-Third set of cleaning rollers, 5-Fourth set of cleaning rollers, 6-Fifth set of cleaning rollers, 7-Pickling tank, 8-First vibrating motor, 81-Stator, 82-Motor, 9-Robot gripper, 10-Steel belt, 11-Mounting frame, 12-Second vibrating motor, 13-Third vibrating motor, 14-Fourth vibrating motor, 15-Support plate, 16-Guide roller, 17-Motor, 18-Synchronous belt, 19-Pulley, 20-First gear, 21-Second gear, 22-First roller, 23-Second roller, 24-Limiting plate. Detailed Implementation

[0030] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and do not constitute a limitation thereof.

[0031] The directional terms or positional relationships such as "left," "right," "front," and "back" used in the embodiments are based on the drawings in this utility model specification. Figure 1 , 4 The orientation relationships are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component must have a specific orientation, or that it must be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the content protected by this utility model.

[0032] like Figures 1-4 As shown, this embodiment includes a transfer roller 1, multiple sets of cleaning rollers, a drive assembly, and an acid pickling tank 7, which is disposed between the transfer roller 1 and the multiple sets of cleaning rollers. This part is prior art and will not be described in detail in this embodiment.

[0033] Compared with the existing hot-dip galvanized steel strip cleaning equipment, the main improvements of this embodiment are: firstly, the addition of an excitation motor, a robotic gripper 9 and a control system; secondly, the addition of a mounting frame 11, which sets the transfer roller 1 and multiple sets of cleaning rollers to an inclined state, so that the steel strip 10 remains in an inclined state during the transmission process.

[0034] 1. Vibration motor, robotic gripper 9, and control system;

[0035] like Figure 1As shown, in this embodiment, the excitation motor is a conventional linear motor. The excitation motor is located at the bottom of the pickling tank 7 and includes a stator 81 and a mover 82. The stator 81 is coaxially sleeved around the mover 82. The stator 81 contains an electromagnetic coil, which generates an alternating magnetic field when energized. The mover 82 moves vertically under the influence of the magnetic field, transmitting the excitation force. The mover 82 is fixedly connected to the bottom plate of the pickling tank 7 via a flange and outputs axial excitation force to drive the pickling tank 7 to vibrate vertically. In this embodiment, the excitation range of the excitation motor is 0.1–10 kN, and the frequency response is 0.1–200 Hz. A support plate 15 is also provided below the excitation motor, and the stator 81 of the excitation motor is fixedly mounted on the support plate 15.

[0036] In this embodiment, four excitation motors are provided, specifically a first excitation motor 8, a second excitation motor 12, a third excitation motor 13, and a fourth excitation motor 14. These are to ensure the balance of the pickling tank 7 and to apply a uniform excitation force to the bottom of the pickling tank 7. In practical applications, the specific number of excitation motors can be adjusted. The moving parts 82 of all four excitation motors are fixedly connected to the bottom of the pickling tank 7. Two of the excitation motors are symmetrically arranged along the length of the pickling tank 7, where the length refers to the front-to-back direction. Figure 2 As shown, the first excitation motor 8 and the second excitation motor 12 are symmetrically arranged front and rear. The other two excitation motors are symmetrically arranged along the width of the pickling tank 7, where the width direction refers to the left and right directions, as shown below. Figure 4 As shown, the third excitation motor 13 and the fourth excitation motor 14 are symmetrical about each other.

[0037] like Figure 2 As shown, there are two robotic grippers 9. The working end of one robotic gripper 9 acts on the steel strip section between the pickling tank 7 and the cleaning drum, and the working end of the other robotic gripper 9 acts on the steel strip section between the pickling tank 7 and the transfer roller 1. Here, the working end of the robotic gripper 9 refers to the end used for clamping. Each of the two robotic grippers 9 clamps the corresponding steel strip 10.

[0038] The robotic gripper 9 is controlled by the control system to grip or release the steel strip 10. The specific structure and working principle of the robotic gripper 9 are existing technologies and will not be detailed in this embodiment. In this embodiment, the signal output terminal of the steel strip winding / unwinding system is connected to the signal input terminal of the control system, the signal output terminal of the control system is connected to the signal input terminal of the excitation motor, and the signal output terminal of the control system is connected to the signal input terminal of the robotic gripper 9. The steel strip winding / unwinding system is existing technology and is used to control the forward transmission of the steel strip 10.

[0039] The purpose of setting up the robotic gripper 9 is: such as Figure 3As shown, a guide roller 16 is rotatably installed inside the pickling tank 7. The structure and installation method of the guide roller 16 are existing technologies and will not be described in detail here. During normal transmission, the steel strip 10 is in a taut state on the transfer roller 1, the guide roller 16, and multiple sets of cleaning rollers. However, when the excitation motor drives the pickling tank 7 to vibrate vertically, the guide roller 16 installed inside the pickling tank 7 will also vibrate. When the guide roller 16 moves upward, it cannot keep the steel strip 10 taut. In order not to affect the steel strip 10 in the cleaning roller section and the steel strip 10 in the transfer roller 1 section, the working principle of this embodiment is as follows: when the steel strip 10 is transported to the pickling tank 7 for soaking, the steel strip unwinding system will transmit a signal to the control system, which will control the excitation motor to work and generate excitation force; at the same time, the control system sends a signal to the robotic gripper 9, so that the robotic gripper 9 clamps the steel strip 10, ensuring that the robotic gripper 9 always clamps the steel strip 10 when the pickling tank 7 vibrates. At this time, the steel strip 10 located between the two robotic grippers 9 is in a loose state, but the steel strip 10 in the cleaning roller section and the steel strip 10 in the transfer roller section remain taut, ensuring the normal operation of the entire production line. After pickling is completed, the steel strip take-up and unwinding system operates to allow the steel strip 10 to be transported normally. At this time, the steel strip take-up and unwinding system sends a signal to the control system again. The control system controls the excitation motor to stop working, the pickling tank 7 to reset, and the guide roller 16 to return to its original position to tighten the steel strip 10. At the same time, the control system also controls the robotic grippers 9 to release the steel strip 10, and the steel strip 10 is transported forward normally.

[0040] II. Mounting bracket 11;

[0041] Mounting bracket 11 is used for mounting on a wall or other substrate. Mounting bracket 11 is hollow inside. On the vertical projection plane along the width of pickling tank 7, as shown... Figure 4 As shown, the mounting frame 11 has an inverted trapezoidal structure. The transfer roller 1 and multiple sets of cleaning rollers are rotatably mounted on the inclined side of the mounting frame 11. The rotatable mounting method of the transfer roller 1 is the prior art.

[0042] like Figure 4 As shown, the cleaning roller rotation is specifically configured as follows: the drive assembly is located inside the mounting bracket 11, and the drive assembly includes a motor 17, a synchronous belt 18, multiple pulleys 19, multiple first gears 20, and multiple second gears 21. In this embodiment, five sets of cleaning rollers are provided, as shown... Figure 2 As shown, each set of cleaning rollers includes a first roller 22 and a second roller 23 corresponding to each other. There is a gap between the first roller 22 and the second roller 23 for the steel strip 10 to pass through. The structure of the cleaning roller is the prior art.

[0043] Each first roller 22 has a first gear 20 fixedly mounted on its shaft, and each second roller 23 has a second gear 21 fixedly mounted on its shaft. The corresponding first gears 20 and second gears 21 mesh and drive each other. Both the first gear 20 and second gear 21 are mounted on the end of the shaft located inside the mounting frame 11. Each second roller 23 has a pulley 19 fixedly mounted on its shaft, positioned between the motor 17 and the second gear 21. A synchronous belt 18 is mounted on multiple pulleys 19. The motor 17 is fixed inside the mounting frame 11 by a mounting plate, and the output shaft of the motor 17 is fixedly connected to the shaft of one of the second rollers 23 via a coupling. Figure 2 , 4 As shown, in this embodiment, the cleaning rollers are named sequentially from front to back as follows: first group of cleaning rollers 2, second group of cleaning rollers 3, third group of cleaning rollers 4, fourth group of cleaning rollers 5, and fifth group of cleaning rollers 6. The output shaft of motor 17 is fixedly connected to the shaft of the second roller 23 in the first group of cleaning rollers 2. In use, motor 17 drives the shaft of the second roller 23 to rotate, which in turn drives the second gear 21 fixed on it to rotate. Under meshing action, the first gear 20 on the first roller 22 in the first group of cleaning rollers 2 rotates, thereby driving the first roller 22 to rotate. Correspondingly, the pulley 19 on the first group of cleaning rollers 2 rotates. Under the action of synchronous belt 18, the pulleys 19 on the second group of cleaning rollers 3, third group of cleaning rollers 4, fourth group of cleaning rollers 5, and fifth group of cleaning rollers 6 all rotate synchronously, thereby driving their respective shafts and second gears 21 to rotate. Under their respective meshing transmission, the first roller 22 and the second roller 23 in the second group of cleaning rollers 3, third group of cleaning rollers 4, fourth group of cleaning rollers 5, and fifth group of cleaning rollers 6 also begin to rotate.

[0044] 3. Clean the roller tilt setting;

[0045] The central axis of the cleaning drum is set at an angle to the horizontal direction. On the vertical projection plane along the width of the pickling tank 7, as shown... Figure 4 As shown, the vertical distance between the free end of the cleaning roller and the ground is less than the vertical distance between the fixed end of the cleaning roller and the ground. Here, the free end refers to the end away from the mounting bracket 11, i.e., the right end. In other words, both the first roller 22 and the second roller 23 are inclined to the lower right. In this embodiment, the angle β between the central axis of the cleaning roller and the horizontal direction is 20°. The central axes of the guide roller 16, the transfer roller 1, and the cleaning roller are parallel, i.e., the guide roller 16 and the transfer roller 1 are also inclined to ensure that the steel belt 10 always remains in an inclined state during transmission.

[0046] Since acid remains on the surface of the pickled steel strip 10 as it is conveyed forward, this embodiment sets the cleaning roller to an inclined position. During the conveying process, the acid will flow down from the lower edge of the steel strip 10 (i.e., the right edge of the steel strip 10). In practice, after passing through the cleaning roller, the steel strip 10 is conveyed forward to the spraying area, where water is sprayed onto the steel strip 10 to clean the acid and residue from its surface. Because the steel strip 10 is conveyed at an inclined position in this embodiment, the water used for spraying will flow directly down from the right edge of the steel strip 10, preventing water from remaining on its surface.

[0047] Furthermore, such as Figure 1 , 4 As shown, a limiting plate 24 for abutting the outer edge of the steel strip is fixed at the free end (i.e., the right end) of the second roller 23 and the free end (i.e., the right end) of the transfer roller 1. In this embodiment, the longitudinal section of the limiting plate 24 is circular, and the radius of the limiting plate 24 is larger than the radius of the second roller 23. Because the lower surface of the steel strip 10 contacts the second roller 23 during transportation, the relatively large radius of the limiting plate 24 in this embodiment can limit the right end of the steel strip 10 and prevent the steel strip 10 from slipping to the lower right.

[0048] In this embodiment, the steel strip 10 is transported from back to front under the action of the transfer roller 1, guide roller 16, and multiple sets of cleaning rollers, and the steel strip 10 remains in an inclined state during the transport process. When it passes through the pickling tank 7, it needs to be soaked. At this time, the control system controls the robotic gripper 9 to clamp the steel strip 10, and at the same time, four excitation motors generate excitation force to make the pickling tank 7 vibrate vertically. When the acid in the pickling tank 7 vibrates, it generates a certain impact force on the steel strip 10, which can break up the oxide scale, rust layer, etc. on the surface of the steel strip 10, so as to facilitate the diffusion of the acid into the oxide scale or dense rust layer, and fully react with the oxide scale or dense rust layer on the steel strip 10, making the pickling more thorough. When the pickling tank 7 vibrates vertically, the guide roller 16 will also move vertically. Due to the clamping of the robotic gripper 9, the steel strip 10 in the cleaning roller section and the steel strip 10 in the transfer roller 1 section are still kept taut. After pickling is completed, the pickling tank 7 is reset, and the guide roller 16 will tighten the steel belt 10 again. At this time, the robotic gripper 9 releases the steel belt 10, and the steel belt 10 is conveyed normally. When the steel belt 10 is transported to the spray area in front of the cleaning roller, the surface of the steel belt 10 is cleaned by spraying. Since the steel belt 10 is in an inclined state, the water after cleaning will flow down from the right edge of the steel belt 10 and will not remain on the surface of the steel belt 10.

[0049] It should be noted that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vibration-assisted dynamic pickling device for hot-dip galvanized steel strip, characterized in that, Includes mounting frame, transfer roller, multiple sets of cleaning rollers, drive assembly, pickling tank, excitation motor, robotic gripper and control system; The transfer roller and multiple sets of cleaning rollers are rotatably mounted on the mounting frame, and the multiple sets of cleaning rollers are driven by a drive assembly. The exciter motor is located at the bottom of the pickling tank. The exciter motor includes a stator and a mover. The stator is coaxially sleeved on the outer periphery of the mover. The mover is fixedly connected to the pickling tank and outputs axial excitation force to drive the pickling tank to vibrate vertically. The robotic gripper has two grippers. The working end of one gripper acts on the steel strip section between the pickling tank and the cleaning drum, while the working end of the other gripper acts on the steel strip section between the pickling tank and the transfer roller. The signal output terminal of the control system is connected to the signal input terminal of the excitation motor, and the signal output terminal of the control system is connected to the signal input terminal of the robotic gripper.

2. The vibration-assisted dynamic pickling equipment for hot-dip galvanized steel strip according to claim 1, characterized in that, There are four vibration motors. The moving parts of the four vibration motors are all fixedly connected to the bottom of the pickling tank. Two of the vibration motors are symmetrically arranged along the length of the pickling tank, and the other two vibration motors are symmetrically arranged along the width of the pickling tank.

3. The vibration-assisted dynamic pickling equipment for hot-dip galvanized steel strip according to claim 2, characterized in that, It also includes a support plate, on which the stators of the four excitation motors are fixed.

4. A vibration-assisted dynamic pickling device for hot-dip galvanized steel strip according to any one of claims 1-3, characterized in that, The central axis of the cleaning roller is set at an angle to the horizontal direction. On the vertical projection plane where the width of the pickling tank is located, the vertical distance between the free end of the cleaning roller and the ground is less than the vertical distance between the fixed end of the cleaning roller and the ground; the central axes of the transfer roller and the cleaning roller are parallel.

5. The vibration-assisted dynamic pickling equipment for hot-dip galvanized steel strip according to claim 4, characterized in that, The angle between the central axis of the cleaning roller and the horizontal direction is 20°.

6. The vibration-assisted dynamic pickling equipment for hot-dip galvanized steel strip according to claim 5, characterized in that, Each set of cleaning rollers includes a first roller and a second roller that are corresponding to each other, with a gap between the first roller and the second roller for the steel strip to pass through; the free end of the second roller and the free end of the transfer roller are both fixed with limiting plates for abutting the outer edge of the steel strip.

7. The vibration-assisted dynamic pickling equipment for hot-dip galvanized steel strip according to claim 6, characterized in that, The mounting frame is hollow inside. On the vertical projection plane where the width of the pickling tank is located, the mounting frame has an inverted trapezoidal structure. The transfer roller and multiple sets of cleaning rollers are rotatably set on the inclined side of the mounting frame.

8. The vibration-assisted dynamic pickling equipment for hot-dip galvanized steel strip according to claim 7, characterized in that, The drive assembly is located inside the mounting bracket and includes a motor, a synchronous belt, multiple pulleys, multiple first gears, and multiple second gears. Each first roller has a first gear fixedly mounted on its shaft, and each second roller has a second gear fixedly mounted on its shaft. The corresponding first and second gears mesh and drive each other. Each second roller has a pulley fixedly mounted on its shaft, and a synchronous belt is mounted on multiple pulleys. The output shaft of the motor is fixedly connected to the shaft of one of the second rollers.

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