Pickling device for low-carbon cold-header steel wire rod

Abstract

The application discloses a pickling device for low-carbon cold upsetting steel wire, and belongs to the field of pickling of steel wire. The device comprises a pickling assembly for storing acid liquid, a lifting assembly for driving the low-carbon cold upsetting steel wire to lift down is slidably connected to the top of the pickling assembly, and a purification assembly for purifying acid gas generated in the pickling process is arranged on the side of the lifting assembly. When the closed box is driven to lift up by the lifting driving roller set, the slide rod is limited by the limiting action of the limiting groove, the rotating handle drives the closed door to rotate around the rotating shaft to the state of being closed on the top of the liquid storage tank, the closed box is isolated from the outside and the liquid storage tank, since the closed box is in a closed state, the exhaust gas cannot escape to the operation room, the exhaust gas in the closed box is drawn out through the exhaust gas hole, and the toxic and harmful gas generated in the pickling process is prevented from easily escaping to the operation workshop environment from the gap between the pickling tank and the cover, the wire feeding and discharging opening and the like.

Description

Technical Field

[0001] This invention relates to the field of pickling steel wire, and particularly to a pickling apparatus for low-carbon cold heading steel wire. Background Technology

[0002] Cold heading steel wire is an important raw material for manufacturing fasteners and cold extruded parts. Its surface quality directly affects the stability of subsequent cold heading forming processes and the final performance of the product. In the production process of cold heading steel wire, pickling is a key process. Its main purpose is to remove oxide scale (iron scale), rust and other impurities from the surface of the wire, so as to provide a clean and activated substrate surface for subsequent surface treatments such as phosphating and saponification, thereby ensuring the lubrication effect and die life during cold heading.

[0003] In the pickling process of low carbon cold heading steel wire, chemical pickling is widely used in industry. Commonly used acids include hydrochloric acid and sulfuric acid. In the existing technology, the pickling operation is usually carried out in a semi-open or poorly sealed pickling tank. After the low carbon cold heading steel wire is immersed in the acid solution, the acid and metal oxides undergo a violent chemical reaction. During this process, a large amount of acidic gas (such as hydrogen chloride gas, sulfur vapor, etc.) and acid mist will be continuously generated.

[0004] In summary, existing pickling equipment suffers from deficiencies in its sealing structure design or inadequate design of its gas collection and exhaust systems. This allows toxic and harmful gases to easily escape into the operating workshop environment through gaps between the pickling tank and the cover, as well as through wire inlet and outlet ports. Furthermore, most existing pickling equipment is only equipped with simple waste gas collection and purification devices, typically using alkaline spraying to treat the collected harmful gases before direct discharge. While this method reduces pollution to the outside atmosphere to some extent, it fails to recover or reuse the unreacted effective components in the waste gas, resulting in waste of acid raw materials and increased production costs. Summary of the Invention

[0005] This invention provides a pickling device for low-carbon cold heading steel wire, which can solve the problem in the prior art that the existing pickling equipment has insufficient sealing structure design or imperfect design in terms of gas collection and exhaust systems, which makes it easy for these toxic and harmful gases to escape into the operating workshop environment from the gap between the pickling tank and the cover, the wire inlet and outlet, etc.

[0006] A pickling device for low-carbon cold heading steel wire includes a pickling assembly for storing acid solution, a lifting assembly for lifting the low-carbon cold heading steel wire to the top of the pickling assembly, and a purification assembly for purifying the acidic gas generated during the pickling process on the side of the lifting assembly. The pickling assembly includes a support frame, inside which is a liquid storage tank, and the top of the liquid storage tank is provided with a sealing door for closing the liquid storage tank. The lifting assembly includes a closed box, and driven wheels are symmetrically arranged at both ends of the inner cavity of the closed box. The surfaces of the driven wheels are fixedly connected with fixing buckles for fixing the cold heading steel wire support. The purification component includes a purification chamber, and the bottom of the purification chamber is provided with a drain pipe for circulating the effective components in the exhaust gas.

[0007] Preferably, one side of the support frame extends upward with an extension plate, and both ends of the extension plate are symmetrically provided with sliding grooves for limiting the position of the enclosed box. The enclosed box is slidably connected to the surface of the extension plate through the sliding grooves.

[0008] Preferably, the inner walls of the support frame are connected to the outer walls of the liquid storage tank at both ends to form lifting grooves for avoiding the closed box, and the closed box can be slidably connected inside the lifting grooves. Preferably, the top of the liquid storage tank is provided with symmetrical clearance grooves at both ends, and the two ends of the closed door are provided with symmetrical rotating shafts, which are rotatably connected to the two ends of the inner wall of the liquid storage tank.

[0009] Preferably, the top two ends of the closed door are symmetrically provided with rotating handles, and the sides of the rotating handles are provided with rotating shafts.

[0010] Preferably, the inner cavity of the enclosed box has symmetrically provided limit grooves at both ends, and the rotating shaft is slidably connected inside the limit grooves.

[0011] Preferably, a drive motor is fixedly connected to the top of the extension plate, and a rotating rod is provided at the output end of the drive motor. Lifting drive roller groups for lifting and lowering the enclosed box are symmetrically arranged at both ends of the rotating rod.

[0012] Preferably, the driven wheel has a driving gear meshing on its surface, and one end of the driving gear is provided with a second motor for driving, which is fixedly connected to the inner wall of the enclosed box.

[0013] Preferably, the top of the enclosed box is rotatably connected to a cover plate, and the surface of the extension plate has a raised stop for supporting one end of the cover plate.

[0014] Preferably, an exhaust vent is provided on the coplanar surface of the enclosed box and the extension plate, the exhaust vent is connected to the purification box, and the bottom of the drain pipe is connected to the storage tank.

[0015] Beneficial effects: 1. When the lifting drive roller group drives the sealed box to rise, the slide bar, under the limiting action of the limiting groove, causes the rotating handle to drive the sealed door to rotate around the rotating shaft to the state of being sealed at the top of the liquid storage tank. This isolates the sealed box from the outside and the liquid storage tank. Since the sealed box is in a sealed state, the exhaust gas cannot escape into the operating room. The exhaust gas in the sealed box is extracted through the exhaust gas hole, preventing the toxic and harmful gases generated by pickling from easily escaping into the operating workshop environment from the gap between the pickling tank and the cover, the wire inlet and outlet, etc.

[0016] 2. This invention places the cold carbon steel wire to be pickled on a support, and fixes both ends of the support in the inner cavity of a closed box using fixing buckles. One end of the fixing buckle is equipped with a locking structure to fix the two ends of the support inserted into the box. The coiled cold carbon steel wire is mounted on a rotatable fixing buckle. By rotating it above the storage tank, the cold carbon steel wire is periodically immersed in and removed from the acid solution. When the cold carbon steel wire enters and exits, the solution is forced into the tightly wound interlayers, while air bubbles are expelled. The cold carbon steel wire only comes into contact with the acid solution when it passes the bottom of the storage tank, and the rest of the wire runs in the air. This achieves continuous cleaning and greatly reduces the amount of acid carried out. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall structure of a pickling device for low-carbon cold heading steel wire provided by the present invention; Figure 2 A side structural cross-sectional view of a pickling device for low-carbon cold heading steel wire provided by the present invention; Figure 3 A front structural cross-sectional view of a pickling device for low-carbon cold heading steel wire provided by the present invention; Figure 4 A side structural cross-sectional view of a pickling device for low-carbon cold heading steel wire provided by the present invention; Figure 5 A partial structural schematic diagram of a pickling device for low-carbon cold heading steel wire provided by the present invention; Figure 6 for Figure 2 Enlarged view of the structure at point A in the middle. Explanation of reference numerals in the attached figures: 1. Pickling assembly; 2. Lifting assembly; 3. Purification assembly; 11. Support frame; 110. Extension plate; 111. Slide groove; 112. Lifting groove; 113. Stop block; 12. Liquid storage tank; 120. Clearance groove; 13. Sealing door; 130. Rotating shaft; 131. Rotating handle; 132. Slide rod; 21. Sealed box; 210. Exhaust gas vent; 211. Drive gear; 22. Limiting groove; 23. Lifting drive roller assembly; 24. Drive motor; 25. Rotating rod; 26. Cover plate; 27. Driven wheel; 28. Second motor; 29. ​​Fixing buckle; 31. Purification box; 32. Drainage pipe. Detailed Implementation

[0018] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0019] like Figures 1 to 6 As shown in the figure, an embodiment of the present invention provides a pickling device for low carbon cold heading steel wire, including a pickling component 1 for storing acid solution, a lifting component 2 for driving the low carbon cold heading steel wire to move up and down slidably connected to the top of the pickling component 1, and a purification component 3 for purifying the acidic gas generated during the pickling process provided on the side of the lifting component 2. Pickling assembly 1 includes a support frame 11, inside which is a liquid storage tank 12. The top of the liquid storage tank 12 has a closing door 13 for sealing the tank. Lifting assembly 2 includes a sealed box 21, with driven wheels 27 symmetrically arranged at both ends of the inner cavity. The surfaces of the driven wheels 27 are fixedly connected with fixing buckles 29 for securing the cold heading steel wire support. Purification assembly 3 includes a purification box 31, with a drain pipe 32 at the bottom for circulating the effective components in the exhaust gas. When the lifting drive roller group 23 drives the sealed box 21 upwards, the slide rod 132, under the limiting action of the limiting groove 22, causes the rotating handle 131 to drive the sealing door 13 to rotate around the rotating shaft 130 until it is sealed at the top of the liquid storage tank 12, isolating the sealed box 21 from the outside and the liquid storage tank 12. At this time, the sealed box 21... The waste gas generated by the pickling reaction inside the 1st chamber is collected in the inner cavity of the sealed box 21 and enters the purification box 31 through the waste gas hole 210 for purification. When pickling is carried out in the pickling tank, the acidic solution reacts chemically with the oxide scale on the surface of the wire, producing waste gas containing hydrogen chloride gas and acid mist. Since the sealed box 21 is in a closed state, the waste gas cannot escape to the operating room. The waste gas in the sealed box 21 is extracted through the waste gas hole 210. After the waste gas enters the purification box 31, it flows upward through the packing layer and comes into countercurrent contact with the absorbent sprayed from top to bottom. Hydrogen chloride gas is highly soluble in water and quickly dissolves in industrial water during the gas-liquid contact process to generate dilute hydrochloric acid. The purification box 31 is connected to the storage tank 12 through the drain pipe 32. When the concentration of dilute hydrochloric acid inside the purification box 31 reaches the preset value, the dilute hydrochloric acid is transported to the storage tank 12 through the drain pipe 32 for recycling.

[0020] An extension plate 110 extends upward from one side of the support frame 11. The two ends of the extension plate 110 are symmetrically provided with sliding grooves 111 for limiting the closed box 21. The closed box 21 is slidably connected to the surface of the extension plate 110 through the sliding grooves 111. The two ends of the inner wall of the support frame 11 and the outer wall of the liquid storage tank 12 form a lifting groove 112 for avoiding the closed box 21. The closed box 21 can be slidably connected inside the lifting groove 112. The two ends of the inner cavity of the closed box 21 are symmetrically provided with limiting grooves 22. The rotating shaft 130 is slidably connected inside the limiting groove 22. The top of the extension plate 110 is fixedly connected to a drive motor 24. The output end of the drive motor 24 is provided with a rotating rod 25. The two ends of the rotating rod 25 are symmetrically provided with lifting drive roller groups 23 for lifting and lowering the closed box 21. The lifting drive roller group 23 includes multiple active rollers and corresponding lifting drive devices for lifting and lowering the closed box 21. The top of the liquid storage tank 12 is symmetrically provided with clearance grooves 120 at both ends. The clearance grooves 120 can prevent interference between the rotating handle 131 and the top ends of the liquid storage tank 12 during the opening and closing of the closed door 13. The closed door 13 is symmetrically provided with rotating shafts 130 at both ends, and the rotating shafts 130 are rotatably connected to the two ends of the inner wall of the liquid storage tank 12. The top of the closed door 13 is symmetrically provided with rotating handles 131 at both ends, and the rotating shafts 130 are provided on the sides of the rotating handles 131. When the cold heading steel wire is pickled, the bracket that fixes the cold carbon steel wire is fixed inside the fixing buckle 29. The closed box 21 is in the lifting drive roller group 23. Under traction, the cold carbon steel wire moves along the lifting groove 112 into the storage tank 12. Due to the limiting groove 22 at both ends of the sealed box 21 limiting the sliding rod 132 on the surface of the rotating handle 131 at both ends of the sealed door 13, the rotating handle 131 drives the sealed door 13 to flip inward and open, so that the cold carbon steel wire can be immersed in the acid solution stored in the storage tank 12 for pickling. The contact surfaces of the lifting groove 112 between the sealed box 21 and the storage tank 12 are all equipped with dynamic sealing components. The dynamic sealing components are usually fluororubber gaskets, which are used to reduce friction loss and improve the sealing life.

[0021] A drive gear 211 meshes with the surface of the driven wheel 27. A second motor 28 for driving is provided at one end of the drive gear 211. The second motor 28 is fixedly connected to the inner wall of the sealed box 21. A cover plate 26 is rotatably connected to the top of the sealed box 21. A stop block 113 for supporting one end of the cover plate 26 is raised on the surface of the extension plate 110. An exhaust vent 210 is provided on the coplanar surface of the sealed box 21 and the extension plate 110. The exhaust vent 210 is connected to the purification box 31. The bottom of the drain pipe 32 is connected to the storage tank 12. The cold carbon steel wire to be pickled is placed on the bracket, and the two ends of the bracket are secured with fasteners. 29 is fixed inside the cavity of the closed box 21. One end of the fixing buckle 29 is provided with a locking structure, which can fix the two ends of the bracket inserted into the cavity. The second motor 28 is used to drive the drive gear 211 to rotate. The coiled cold carbon steel wire is mounted on the rotatable fixing buckle 29. By rotating above the liquid storage tank 12, the cold carbon steel wire is periodically immersed in and out of the acid solution. When the cold carbon steel wire enters and exits, the solution is forced into the tightly wound interlayer and air bubbles are discharged at the same time. The cold carbon steel wire only comes into contact with the acid solution when it passes the bottom of the liquid storage tank 12. The rest of the wire runs in the air, which not only achieves continuous cleaning, but also greatly reduces the amount of acid carried out.

[0022] Working principle: The cold carbon steel wire to be pickled is placed on a support. The two ends of the support are fixed in the inner cavity of the sealed box 21 by fixing buckles 29. One end of the fixing buckle 29 is provided with a locking structure to fix the two ends of the support inserted into the interior. Under the traction of the lifting drive roller group 23, the sealed box 21 moves the cold carbon steel wire along the lifting groove 112 into the liquid storage tank 12. Due to the limiting groove 22 at both ends of the sealed box 21 limiting the sliding rod 132 on the surface of the rotating handle 131 at both ends of the sealing door 13, the rotating handle 131 drives the sealing door 13 to flip inward and open. The second motor 28 is used to drive the drive gear 211 to rotate. The coiled cold carbon steel wire is mounted on the rotatable fixing buckle 29. By rotating above the liquid storage tank 12, the cold carbon steel wire is rotated around the circumference of the coil. The acid is periodically immersed in and removed from the acid solution. After pickling, the lifting drive roller group 23 pulls the closed box 21 upward, causing the bracket containing cold carbon steel wire, which is locked by the fixing buckle 29, to leave the inside of the liquid storage tank 12. As the closed box 21 rises, it drives the closing door 13 to close the connection between the liquid storage tank 12 and the closed box 21, so that the generated waste gas is stored in the inner cavity of the closed box 21. When the waste gas enters the purification box 31, it flows upward through the packing layer and comes into countercurrent contact with the absorbent sprayed from top to bottom. Hydrogen chloride gas is highly soluble in water and quickly dissolves in industrial water during the gas-liquid contact process to generate dilute hydrochloric acid. The purification box 31 is connected to the liquid storage tank 12 through the drain pipe 32. When the concentration of dilute hydrochloric acid inside the purification box 31 reaches the preset value, the dilute hydrochloric acid is transported to the liquid storage tank 12 for recycling through the drain pipe 32.

[0023] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A pickling apparatus for low-carbon cold heading steel wire, comprising a pickling assembly (1) for storing acid solution, characterized in that, The top of the pickling assembly (1) is slidably connected to a lifting assembly (2) for lifting low carbon cold heading steel wire. The side of the lifting assembly (2) is provided with a purification assembly (3) for purifying the acidic gas generated during the pickling process. The pickling assembly (1) includes a support frame (11), and a liquid storage tank (12) is provided inside the support frame (11). The top of the liquid storage tank (12) is provided with a sealing door (13) for closing the liquid storage tank (12). The lifting assembly (2) includes a closed box (21), and driven wheels (27) are symmetrically arranged at both ends of the inner cavity of the closed box (21). The surface of the driven wheels (27) is fixedly connected with a fixing buckle (29) for fixing the cold heading steel wire support. The purification component (3) includes a purification box (31), and the bottom of the purification box (31) is provided with a drain pipe (32) for circulating the effective components in the exhaust gas.

2. The pickling apparatus for low-carbon cold heading steel wire as described in claim 1, characterized in that, One side of the support frame (11) extends upward with an extension plate (110). The two ends of the extension plate (110) are symmetrically provided with sliding grooves (111) for limiting the closed box (21). The closed box (21) is slidably connected to the surface of the extension plate (110) through the sliding grooves (111).

3. The pickling apparatus for low-carbon cold heading steel wire as described in claim 2, characterized in that, The inner walls of the support frame (11) and the outer walls of the liquid storage tank (12) form a lifting groove (112) for avoiding the closed box (21), and the closed box (21) can be slidably connected inside the lifting groove (112).

4. The pickling apparatus for low-carbon cold heading steel wire as described in claim 3, characterized in that, The top of the liquid storage tank (12) is symmetrically provided with clearance grooves (120), and the two ends of the closed door (13) are symmetrically provided with rotating shafts (130), which are rotatably connected to the two ends of the inner wall of the liquid storage tank (12).

5. The pickling apparatus for low-carbon cold heading steel wire as described in claim 4, characterized in that, The top two ends of the closed door (13) are symmetrically provided with rotating handles (131), and the sides of the rotating handles (131) are provided with rotating shafts (130).

6. The pickling apparatus for low-carbon cold heading steel wire as described in claim 5, characterized in that, The inner cavity of the enclosed box (21) has symmetrically opened limit grooves (22) at both ends, and the rotating shaft (130) is slidably connected inside the limit grooves (22).

7. The pickling apparatus for low-carbon cold heading steel wire as described in claim 2, characterized in that, A drive motor (24) is fixedly connected to the top of the extension plate (110). A rotating rod (25) is provided at the output end of the drive motor (24). A lifting drive roller group (23) for lifting the closed box (21) is symmetrically arranged at both ends of the rotating rod (25).

8. The pickling apparatus for low-carbon cold heading steel wire as described in claim 1, characterized in that, The driven wheel (27) is meshed with a drive gear (211), and a second motor (28) for driving is provided at one end of the drive gear (211). The second motor (28) is fixedly connected to the inner wall of the closed box (21).

9. The pickling apparatus for low-carbon cold heading steel wire as described in claim 7, characterized in that, The top of the enclosed box (21) is rotatably connected to a cover plate (26), and the surface of the extension plate (110) has a stop (113) for supporting one end of the cover plate (26).

10. The pickling apparatus for low-carbon cold heading steel wire as described in claim 9, characterized in that, The enclosed box (21) and the extension plate (110) are provided with exhaust gas holes (210), the exhaust gas holes (210) are connected to the purification box (31), and the bottom of the drain pipe (32) is connected to the storage tank (12).

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