Steel wire on-line pickling spray device and method of use

Abstract

This invention relates to the field of online pickling technology, and discloses an online pickling spray device and method for steel wire. The device includes an acid tank, a pickling cylinder disposed within the acid tank, multiple spray components arranged sequentially at intervals along the axial direction of the pickling cylinder, and inlet guide wheels and outlet guide wheels respectively disposed on both sides of the upper surface of the acid tank. The steel wire passes sequentially through the inlet guide wheel, the pickling cylinder, and the outlet guide wheel. Each spray component includes multiple nozzles evenly distributed circumferentially along the pickling cylinder. Along the direction of steel wire travel, the angle between the axis of each nozzle and the direction of steel wire travel gradually decreases from 90°. In this invention, the gradually changing angle arrangement causes the acid to scour the surface of the steel wire along the travel path. The inlet section mainly uses normal impact to break scale, while the outlet section mainly uses tangential scouring and peeling, achieving a synergistic effect of impact scaling and shear peeling. Simultaneously, the evenly distributed circumferential nozzles effectively reduce local pickling dead zones, improving pickling efficiency and uniformity.

Description

Technical Field

[0001] This invention relates to the field of online pickling technology, and in particular to an online pickling spray device for steel wire and its usage method. Background Technology

[0002] Online pickling of steel wire is a key pretreatment process in steel wire drawing production. It is used to remove iron oxide scale from the surface of the steel wire, providing a clean substrate surface for subsequent drawing, coating and other processes. Currently, online pickling of steel wire mostly adopts the acid circulation spray method, that is, nozzles are arranged along the steel wire running path, and the acid is pressurized by the pickling pump and sprayed onto the surface of the steel wire.

[0003] In existing spraying devices, each nozzle is fixedly arranged at the same angle on one side of the steel wire. The direction of acid spraying is usually perpendicular to the direction of steel wire movement. Under this method, the tangential scouring force of the acid on the surface of the steel wire is weak, and the oxide scale is mainly removed by chemical corrosion, with limited physical peeling effect. In addition, when the oxide scale is thick, a large normal impact force is required to break it. After the oxide scale is loosened, a large tangential force is required to peel it off from the surface. A single spray angle cannot meet both of these requirements, resulting in limited pickling efficiency. Summary of the Invention

[0004] To overcome the above shortcomings, the present invention provides an online pickling spray device and method for steel wire, which aims to improve the problems of insufficient tangential scouring force and inability to meet the different scouring needs of oxide scale breakage and peeling stages caused by the single nozzle angle of existing spray devices.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an online pickling spray device for steel wire and a method of use, comprising an acid tank, and further comprising:

[0006] Pickling drum, installed inside the acid bath;

[0007] The inlet guide wheel and the outlet guide wheel are respectively set on both sides of the upper surface of the acid tank, and the steel wire passes through the inlet guide wheel, the pickling drum and the outlet guide wheel in sequence;

[0008] The spray assembly consists of multiple spray assemblies arranged sequentially at intervals along the axial direction of the pickling cylinder. Each spray assembly includes multiple nozzles that are evenly distributed around the circumference of the pickling cylinder. Along the direction of wire travel, the angle between the axis of each nozzle and the direction of wire travel gradually decreases from 90°.

[0009] Preferably, the pickling cylinder is cylindrical, and the steel wire passes through the pickling cylinder along its axial direction. The center line of the steel wire is collinear with the axis of the pickling cylinder to ensure a constant distance between the nozzle and the steel wire and a consistent spray angle.

[0010] Preferably, the spray assembly further includes a mounting base, which is fixedly mounted on the outer peripheral surface of the pickling tank. A rotating shaft is rotatably mounted on the mounting base, and the spray head is fixedly connected to the rotating shaft.

[0011] The pickling cylinder has a rotating groove on its peripheral wall. The nozzle passes through the rotating groove and extends into the pickling cylinder. The rotating groove provides clearance for the rotation of the nozzle, ensuring that the nozzle can rotate flexibly. The spray angle of the nozzle is in the range of 30° to 90°.

[0012] Preferably, the spray assembly further includes a rotating plate fixedly connected to the rotating shaft, a telescopic plate slidably connected inside the rotating plate, a movable plate rotatably connected to the other end of the telescopic plate, and an annular bracket fixedly connected to the other end of the movable plate. Multiple movable plates located at the same axial position are all fixedly connected to the same annular bracket.

[0013] The pickling cylinder has a movable groove axially formed on its peripheral wall. A slider is fixed inside the annular support and is slidably connected to the movable groove. The annular support slides axially in the movable groove through the slider.

[0014] Preferably, a mounting ring is fixedly connected to the side of the annular bracket away from the moving plate. The mounting ring has a threaded hole along its circumference, and a locking bolt is threaded into the threaded hole. The locking bolt passes through the mounting ring and abuts against the outer wall of the pickling tank. After the angle is adjusted, tightening the bolt locks the annular bracket.

[0015] Preferably, it also includes an external pickling pump, and the nozzle is provided with a liquid injection port, which is connected to the liquid outlet of the external pickling pump through a pipe to provide a stable supply of high-pressure acid to the nozzle.

[0016] The acid tank has a return port on its bottom side wall, which is connected to the inlet of an external pickling pump through a pipe. The acid tank works in conjunction with the external pickling pump to ensure the circulation of acid.

[0017] Preferably, it also includes a motor, and the axle of the outlet guide wheel is fixedly connected to the output shaft of the motor. The motor drives the outlet guide wheel to rotate, and the outlet guide wheel actively pulls the steel wire to run.

[0018] Preferably, the bottom of the pickling cylinder is provided with a drain port, through which the sprayed acid flows back to the acid pool, realizing the recycling of acid.

[0019] Preferably, a cylinder support is fixedly connected inside the acid tank, and the pickling cylinder is fixedly connected to the cylinder support.

[0020] A method of using an online pickling spray device for steel wire, characterized by comprising the following steps:

[0021] S1. The steel wire to be pickled is guided by the inlet guide wheel, passes through the pickling cylinder, and is then led out by the outlet guide wheel;

[0022] S2. Determine the preset angle of each nozzle based on the diameter of the steel wire to be pickled, the thickness of the oxide scale, and the concentration of the acid solution. The preset angle of the nozzle is positively correlated with the diameter of the steel wire and the thickness of the oxide scale, and negatively correlated with the concentration of the acid solution.

[0023] S3. Push and pull the annular bracket along the axial direction of the pickling cylinder to deflect each group of nozzles to the corresponding preset spray angle;

[0024] S4. Tighten the locking bolts to lock the ring bracket and fix the spray angle of the nozzle;

[0025] S5. Start the external pickling pump to deliver acid to each nozzle. At the same time, start the motor to drive the outlet guide wheel to rotate, which will drive the steel wire through the pickling cylinder and start pickling the steel wire.

[0026] S6. During the pickling process, the steel wire passes through each spray assembly in sequence. The inlet nozzle sprays acid at a near-vertical angle, causing the oxide scale to crack. The spray angle of the subsequent nozzles decreases in sequence, peeling the cracked and loosened oxide scale off the surface of the steel wire.

[0027] S7. After pickling is completed, turn off the motor and external pickling pump, and clean the unit.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. This invention achieves a change in the way the acid washes the steel wire surface by gradually decreasing the spray angle of each nozzle from 90° along the running direction of the steel wire: the inlet section sprays at a vertical angle, with a strong normal impact force, causing cracks in the dense oxide scale; the outlet section sprays at a small angle in the near-coaxial direction, with a large tangential scouring force, peeling the loosened oxide scale from the substrate surface, thus achieving both impact scaling and shear peeling. In addition, the nozzles are evenly distributed around the pickling cylinder, making the circumferential force on the steel wire symmetrical, effectively reducing the local pickling dead corners that are easily generated by unilateral spraying. At the same time, the uniform circumferential force on the steel wire reduces the risk of steel wire deformation caused by uneven spraying.

[0030] 2. This invention achieves stepless adjustment of the nozzle spray angle within the range of 30° to 90° through the linkage structure of the ring bracket, the moving plate, the telescopic plate and the rotating plate. The spray angle can be flexibly adjusted according to the steel wire diameter, the oxide scale thickness and the acid concentration, so that the same set of equipment can adapt to the spraying requirements of different specifications of steel wire and different process conditions, thus improving the versatility of the equipment. Attached Figure Description

[0031] Figure 1 This is a perspective view of the present invention;

[0032] Figure 2 A three-dimensional view of the pickling cylinder and cylinder support;

[0033] Figure 3 A partial sectional view of the pickling drum, spray assembly, and steel wire;

[0034] Figure 4 A perspective view of the pickling tank and spray assembly;

[0035] Figure 5 A perspective view of the pickling tank and part of the spray assembly;

[0036] Figure 6 Exploded view of the pickling tank and part of the spray assembly;

[0037] Figure 7 Three-dimensional spray assembly Figure 1 ;

[0038] Figure 8 Three-dimensional spray assembly Figure 2 .

[0039] Figure label:

[0040] 1. Acid tank; 11. Return port; 2. Pickling cylinder; 21. Drain port; 22. Rotating tank; 23. Moving tank; 3. Spray assembly; 31. Spray head; 311. Injection port; 32. Mounting base; 33. Rotating shaft; 34. Rotating plate; 35. Telescopic plate; 36. Moving plate; 37. Annular bracket; 38. Mounting ring; 39. Locking bolt; 4. Inlet guide wheel; 5. Outlet guide wheel; 6. Motor; 7. Cylinder bracket; 8. Steel wire. Detailed Implementation

[0041] Example 1

[0042] Reference Figures 1-3 This embodiment provides an online pickling spray device for steel wire and its usage method, including an acid tank 1, a pickling cylinder 2, a spray assembly 3, an inlet guide wheel 4, an outlet guide wheel 5, and an external pickling pump.

[0043] Acid tank 1 is a box structure with an open top, used to contain pickling solution. Pickling cylinder 2 is set inside acid tank 1. Pickling cylinder 2 is cylindrical with openings at both ends for steel wire 8 to pass through. The bottom of pickling cylinder 2 is higher than the liquid level in acid tank 1. A cylinder support 7 is fixedly connected inside acid tank 1. Pickling cylinder 2 is fixedly connected to cylinder support 7 and supported inside acid tank 1 by cylinder support 7. A drain port 21 is opened on the bottom side wall of pickling cylinder 2. The sprayed acid flows into acid tank 1 through drain port 21 to realize the recycling of acid. A return port 11 is opened on the bottom side wall of acid tank 1. Return port 11 is connected to the inlet of external pickling pump through a pipe.

[0044] The inlet guide wheel 4 and the outlet guide wheel 5 are respectively set on both sides of the upper surface of the acid tank 1. The tank also includes a motor 6. The axle of the outlet guide wheel 5 is fixedly connected to the output shaft of the motor 6. The motor 6 drives the outlet guide wheel 5 to rotate, which drives the steel wire 8 to move along the axis of the pickling cylinder 2. After being guided by the inlet guide wheel 4, the steel wire 8 passes through the pickling cylinder 2 along the axis of the pickling cylinder 2 and is then led out by the outlet guide wheel 5. The center line of the steel wire 8 is collinear with the axis of the pickling cylinder 2.

[0045] Both the motor 6 and the external pickling pump are electrically connected to the controller. The controller is used to control the start and stop of the motor 6 and its speed to adjust the running speed of the steel wire 8, and to control the start and stop of the external pickling pump and its output pressure to achieve matching between the steel wire's travel speed and the spray flow rate.

[0046] Multiple spraying components 3 are provided and arranged sequentially at intervals along the axial direction of the pickling cylinder 2. Each spraying component 3 includes multiple nozzles 31, which are evenly distributed around the circumference of the pickling cylinder 2. The nozzles 31 are fixedly installed on the circumferential wall of the pickling cylinder 2. The liquid outlet end of the nozzle 31 extends into the interior of the pickling cylinder 2. The nozzle 31 is provided with an injection port 311, which is connected to the liquid outlet end of an external pickling pump through a pipe. The external pickling pump draws acid from the acid pool 1, pressurizes it, and delivers it to each nozzle 31 through a pipe, where it is sprayed onto the surface of the steel wire 8.

[0047] Along the running direction of the steel wire 8, the angle between the axis of each nozzle 31 and the running direction of the steel wire 8 gradually decreases from 90°. At the inlet end of the steel wire 8, the spraying direction of the nozzle 31 is perpendicular to the running direction of the steel wire 8. The acid liquid impacts the surface of the steel wire 8 with a large normal impact force, causing cracks in the thick iron oxide scale. As the steel wire 8 moves forward, the spraying angle of the subsequent nozzles 31 gradually decreases, the spraying direction of the acid liquid gradually tilts towards the running direction of the steel wire 8, and the tangential scouring force gradually increases, peeling the cracked and loose iron oxide scale from the surface of the steel wire 8.

[0048] With the aforementioned gradually changing angle arrangement, the way the acid washes the surface of the steel wire changes accordingly. The inlet section is mainly subjected to normal impact, which causes the dense oxide scale to develop initial cracks. The outlet section is mainly subjected to tangential scouring, which peels the loosened oxide scale off the substrate surface, achieving a coordinated effect of impact scale breaking and shear peeling. At the same time, multiple nozzles 31 are evenly distributed around the circumference of the pickling cylinder 2, and the steel wire 8 is subjected to symmetrical force around the circumference, avoiding the bending deformation of the steel wire or local pickling dead corners that may be caused by unilateral spraying, further ensuring the uniformity of pickling.

[0049] The number and angle of the nozzles 31 can be adjusted according to actual process requirements. In this embodiment, there are four sets of spray components 3. Along the running direction of the steel wire 8, the angles between the axis of the nozzles 31 in the four sets of spray components 3 and the running direction of the steel wire 8 are 90°, 60°, 45° and 30° respectively.

[0050] Example 2

[0051] Reference Figures 1-8 Based on Embodiment 1, the spray assembly 3 in this embodiment is equipped with a nozzle angle adjustment function, which can synchronously adjust the spray angle of each group of nozzles 31 according to process requirements.

[0052] The spray assembly 3 also includes a mounting base 32, a rotating shaft 33, a rotating plate 34, a telescopic plate 35, a movable plate 36, and an annular bracket 37.

[0053] Mounting base 32 is fixedly installed on the outer circumferential surface of pickling cylinder 2, and mounting base 32 is set at the position corresponding to rotating groove 22. Rotating shaft 33 is rotatably installed on mounting base 32. Spray head 31 is fixedly connected to rotating shaft 33. Spray head 31 rotates synchronously with rotating shaft 33. Rotating groove 22 is provided on the peripheral wall of pickling cylinder 2. Spray head 31 passes through rotating groove 22 and extends into the interior of pickling cylinder 2. Rotating groove 22 provides clearance space for the rotation of spray head 31.

[0054] The rotating plate 34 is fixedly connected to the rotating shaft 33. A telescopic plate 35 is slidably connected inside the rotating plate 34. The telescopic plate 35 can slide and extend along the length of the rotating plate 34. A movable plate 36 is rotatably connected to one end of the telescopic plate 35 away from the rotating plate 34. An annular bracket 37 is fixedly connected to the other end of the movable plate 36. Multiple movable plates 36 located in the same axial position are all fixedly connected to the same annular bracket 37.

[0055] A movable groove 23 is provided on the peripheral wall of the pickling cylinder 2 along the axial direction. A slider is fixed inside the annular support 37. The slider is slidably connected in the movable groove 23. The annular support 37 slides along the axial direction of the pickling cylinder 2 in the movable groove 23 through the slider.

[0056] When it is necessary to adjust the spray angle of the nozzle 31, the operator pushes the annular bracket 37 along the axial direction of the pickling cylinder 2. When the annular bracket 37 slides, it drives the moving plate 36 to move axially. The moving plate 36 drives the telescopic plate 35 to rotate. The telescopic plate 35 drives the rotating plate 34 and the rotating shaft 33 to rotate. The rotating shaft 33 drives the nozzle 31 to rotate synchronously, thereby realizing the angle adjustment of the nozzle 31. The telescopic plate 35 can slide along the length direction of the rotating plate 34 to compensate for the height difference generated when the telescopic plate 35 rotates itself. Since the same annular bracket 37 is connected to multiple moving plates 36 located in the same axial position, all nozzles 31 in this axial position can achieve synchronous angle adjustment.

[0057] An installation ring 38 is fixedly connected to the side of the annular bracket 37 away from the moving plate 36. The installation ring 38 has a threaded hole along its circumference, and a locking bolt 39 is threaded into the threaded hole. When the nozzle 31 is adjusted to the required angle, the locking bolt 39 is tightened so that the locking bolt 39 passes through the installation ring 38 and abuts against the outer wall of the pickling cylinder 2, thereby locking the annular bracket 37 in the current position and fixing the spray angle of the nozzle 31.

[0058] The specific operation method of this embodiment is as follows:

[0059] S1. The steel wire 8 to be pickled is guided by the inlet guide wheel 4 and then passed through the pickling cylinder 2, and then led out by the outlet guide wheel 5;

[0060] S2. Based on the diameter of the steel wire 8 to be pickled, the thickness of the oxide scale, and the concentration of the acid solution, determine the preset angle of each nozzle 31. The preset angle of the nozzle 31 is positively correlated with the diameter of the steel wire and the thickness of the oxide scale, and negatively correlated with the concentration of the acid solution.

[0061] S3. Push and pull the annular bracket 37 along the axial direction of the pickling cylinder 2 to deflect each group of nozzles 31 to the corresponding preset spray angle;

[0062] S4. Tighten the locking bolt 39 to lock the annular bracket 37 and fix the spray angle of the nozzle 31;

[0063] S5. Start the external pickling pump to deliver acid to each nozzle 31. At the same time, start the motor 6 to drive the outlet guide wheel 5 to rotate, which will drive the steel wire 8 through the pickling cylinder 2 and start pickling the steel wire 8.

[0064] S6. During the pickling process, the steel wire 8 passes through each spray assembly 3 in sequence. The inlet nozzle 31 sprays acid at a near-vertical angle, causing the oxide scale to crack. The spray angle of the subsequent nozzles 31 decreases in sequence, peeling the cracked and loosened oxide scale off the surface of the steel wire 8.

[0065] S7. After pickling is completed, turn off motor 6 and external pickling pump, and clean the device.

[0066] Compared to the fixed nozzle angle structure in Embodiment 1, which cannot be adjusted according to actual working conditions, this embodiment achieves stepless adjustment of the nozzle 31's spray angle within the range of 30° to 90° through the linkage structure of the annular bracket 37, the movable plate 36, the telescopic plate 35, and the rotating plate 34. For steel wires of different diameters and oxide scale thicknesses, a matching spray angle can be flexibly set: a larger angle is selected for coarse steel wires or steel wires with thicker oxide scale to enhance impact scaling, while a smaller angle is selected for fine steel wires or steel wires with thinner oxide scale to avoid over-corrosion. This not only replicates the fixed angle ratio of Embodiment 1 but can also be set to any intermediate angle according to actual needs. When process parameters such as acid concentration and steel wire running speed fluctuate, the angle can be quickly adjusted on-site to compensate. The entire adjustment process can be completed simply by pushing and pulling the annular bracket 37 and tightening the bolts, improving the process adaptability of the device and the convenience of on-site operation.

Claims

1. A steel wire online pickling spray device, comprising an acid tank (1), characterized in that, Also includes: Pickling cylinder (2) is installed inside acid tank (1); The inlet guide wheel (4) and the outlet guide wheel (5) are respectively set on both sides of the upper surface of the acid tank (1). The steel wire (8) passes through the inlet guide wheel (4), the pickling cylinder (2) and the outlet guide wheel (5) in sequence. Spray assembly (3), multiple spray assemblies (3) are arranged sequentially at intervals along the axial direction of pickling cylinder (2). The spray assembly (3) includes multiple nozzles (31), which are evenly distributed along the circumference of pickling cylinder (2). Along the running direction of steel wire, the angle between the axis of each nozzle (31) and the running direction of steel wire (8) gradually decreases from 90°.

2. The online pickling spray device for steel wire according to claim 1, characterized in that, The pickling cylinder (2) is cylindrical, and the steel wire (8) passes through the pickling cylinder (2) along its axial direction. The center line of the steel wire (8) is collinear with the axis of the pickling cylinder (2).

3. The online pickling spray device for steel wire according to claim 1, characterized in that, The spray assembly (3) also includes a mounting base (32), which is fixedly mounted on the outer circumferential surface of the pickling cylinder (2). A rotating shaft (33) is rotatably mounted on the mounting base (32), and the spray head (31) is fixedly connected to the rotating shaft. The pickling cylinder (2) has a rotating groove (22) on its peripheral wall. The nozzle (31) passes through the rotating groove (22) and extends into the pickling cylinder (2). The rotating groove (22) provides clearance for the rotation of the nozzle (31). The spray angle of the nozzle (31) is 30° to 90°.

4. The online pickling spray device for steel wire according to claim 3, characterized in that, The spray assembly (3) also includes a rotating plate (34) fixedly connected to the rotating shaft. A telescopic plate (35) is slidably connected inside the rotating plate (34). A movable plate (36) is rotatably connected to the other end of the telescopic plate (35). An annular bracket (37) is fixedly connected to the other end of the movable plate (36). Multiple movable plates (36) located in the same axial position are all fixedly connected to the same annular bracket (37). The pickling cylinder (2) has a movable groove (23) axially formed on its peripheral wall. A slider is fixed inside the annular support (37), and the slider is slidably connected to the movable groove (23). The annular support (37) slides axially in the movable groove (23) through the slider.

5. The online pickling spraying device for steel wire according to claim 4, characterized in that, The annular bracket (37) is fixedly connected to a mounting ring (38) on the side away from the moving plate (36). The mounting ring (38) has a threaded hole along the circumferential direction, and a locking bolt (39) is threaded into the threaded hole. The locking bolt (39) passes through the mounting ring (38) and abuts against the outer wall of the pickling cylinder (2).

6. The online pickling spraying device for steel wire according to claim 1, characterized in that, It also includes an external pickling pump, and the nozzle (31) is provided with a liquid injection port (311), which is connected to the liquid outlet of the external pickling pump through a pipe; The acid tank (1) has a return port (11) on its bottom side wall, and the return port (11) is connected to the inlet of an external acid pickling pump through a pipe.

7. The online pickling spraying device for steel wire according to claim 1, characterized in that, It also includes a motor (6), the axle of the outlet guide wheel (5) is fixedly connected to the output shaft of the motor (6), and the motor (6) drives the outlet guide wheel (5) to rotate.

8. The online pickling spraying device for steel wire according to claim 1, characterized in that, The bottom of the pickling cylinder (2) is provided with a drain port (21).

9. The online pickling spraying device for steel wire according to claim 1, characterized in that, The acid tank (1) is fixedly connected to a cylinder support (7), and the acid washing cylinder (2) is fixedly connected to the cylinder support (7).

10. A method of using an online pickling spray device for steel wire, characterized in that, Includes the following steps: S1. The steel wire (8) to be pickled is guided by the inlet guide wheel (4) and passed through the pickling cylinder (2), and then led out by the outlet guide wheel (5); S2. Based on the diameter of the steel wire (8) to be pickled, the oxide scale thickness and the acid concentration, determine the preset angle of each nozzle (31). The preset angle of the nozzle (31) is positively correlated with the diameter of the steel wire and the oxide scale thickness, and negatively correlated with the acid concentration. S3. Push and pull the annular bracket (37) along the axial direction of the pickling cylinder (2) to deflect each group of nozzles (31) to the corresponding preset spray angle; S4. Tighten the locking bolt (39) to lock the ring bracket (37) and fix the spray angle of the nozzle (31); S5. Start the external pickling pump to deliver acid to each nozzle (31), and at the same time start the motor (6) to drive the outlet guide wheel (5) to rotate, which will drive the steel wire (8) through the pickling cylinder (2) to start pickling the steel wire (8); S6. During the pickling process, the steel wire (8) passes through each spray assembly (3) in sequence. The inlet nozzle (31) sprays acid at a near-vertical angle, causing the oxide scale to crack. The spray angle of the subsequent nozzles (31) decreases in sequence, peeling the cracked and loosened oxide scale from the surface of the steel wire (8). S7. After pickling is completed, turn off the motor (6) and the external pickling pump, and clean the device.

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