Purging device for pickling steel strip

Abstract

The utility model discloses a purging device for pickling a steel belt, which belongs to the technical field of purging after pickling, and comprises a purging bin arranged on one side of a pickling tank, a feeding port and a discharging port are respectively arranged on two sides of the purging bin, and the purging bin is provided with a discharge port. And the collecting mechanism comprises two high-pressure air pipes fixedly connected to the inner wall of the purging bin, the surfaces of the high-pressure air pipes communicate with a plurality of high-pressure spray heads, and a collecting box is arranged below the multiple high-pressure spray heads. Through the mode, the two high-pressure air pipes are provided with the multiple high-pressure nozzles for spraying air in different directions, when two faces of a steel belt subjected to acid pickling are blown, acid pickling liquid on the surfaces of the steel belt is blown to the two sides through air flow, then the acid pickling liquid falls into the collecting box, the acid pickling liquid is conveniently collected, follow-up treatment is facilitated, and the service life of the steel belt is prolonged. The heavy metal pollution of the pickling solution to the environment can be effectively reduced, and meanwhile, the waste of the pickling solution can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of post-pickling purging technology, specifically to a purging device for pickling steel strips. Background Technology

[0002] Pickling of steel strip is a process that uses acids such as hydrochloric acid or sulfuric acid to dissolve iron oxide scale, welding residues, and contaminants on the surface of steel strip. This restores the metal's surface finish and improves its corrosion resistance, preventing defects caused by the oxide layer being pressed into the substrate during cold rolling. After pickling, a high-pressure airflow is required to blow away residual acid and passivation solution from the surface, preventing secondary corrosion or contamination of subsequent processes. This also reduces acid waste and ensures the steel strip is dry and clean, providing a uniform surface for cold rolling, coating, and other processing. A special purging device for steel strip pickling is needed to purge the steel strip after pickling.

[0003] A search revealed the Chinese patent "A Dual Compressed Air Blowing Device for Pickling Steel Strip Production" (authorization announcement number CN220432992U). This utility model employs two sets of blowing devices to simultaneously blow the upper and lower surfaces of the pickled steel strip, enabling the surface moisture to dry quickly, improving the blowing effect, and avoiding yellowing and rust defects caused by water on the pickled steel strip surface. The surface of the pickled steel strip achieves a silvery-white finish. Simultaneously, it reduces compressed air consumption, saving time and labor, and improving production efficiency.

[0004] Although the above application can simultaneously blow the top and bottom surfaces of the pickled steel strip by setting up two sets of purging devices, thereby quickly drying the moisture and pickling liquid on the surface of the steel strip and improving the purging efficiency, it cannot effectively collect the pickling liquid after purging the steel strip.

[0005] Based on this, the present invention designs a purging device for pickling steel strips to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a purging device for pickling steel strip.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A purging device for pickling steel strip includes a purging chamber disposed on one side of the pickling tank, wherein an inlet and an outlet are respectively disposed on both sides of the purging chamber.

[0009] Furthermore, the collection mechanism includes two high-pressure air pipes fixedly connected to the inner wall of the purge chamber, with multiple high-pressure nozzles connected to the surface of the high-pressure air pipes, and a collection box disposed below the multiple high-pressure nozzles.

[0010] Furthermore, the two high-pressure air pipes are located on different horizontal lines of the same vertical line, and the high-pressure nozzles on the two high-pressure air pipes are arranged opposite each other.

[0011] Furthermore, multiple high-pressure nozzles on the same high-pressure air pipe are all inclined, with the high-pressure nozzle in the middle inclined between the two high-pressure air pipes, and the high-pressure nozzles on both sides inclined between the two high-pressure air pipes as well as inclined to both sides.

[0012] Furthermore, an air pump is fixedly connected to the back of the purge chamber, and the two high-pressure air pipes are connected to one air pump.

[0013] Furthermore, both sides of the collection box are fixedly connected to sliding strips, which are slidably inserted into the inner walls of both sides of the purge chamber, and a handle is fixedly connected to the surface of the collection box.

[0014] Furthermore, the purge chamber is equipped with two sets of cleaning rollers. One end of each cleaning roller is rotatably connected to the inner wall of the purge chamber, and the other end extends through the purge chamber and is fixedly connected to a drive wheel. Each set of cleaning rollers consists of two cleaning rollers located on the same horizontal line, and a drive belt is provided between each set of drive wheels.

[0015] Furthermore, two drive motors are fixedly connected to the back of the purge chamber, and each of the two drive motors is fixedly connected to one of the drive wheels in each set of drive wheels.

[0016] Furthermore, a rotating roller is rotatably connected to the inner wall of the purge chamber, and the rotating roller is located below the feed inlet. An adjusting roller is rotatably connected to the inner wall of the purge chamber, and the adjusting roller is located between the rotating roller and the high-pressure nozzle. Beneficial effects

[0017] 1. By setting multiple high-pressure nozzles that spray air in different directions on two high-pressure air pipes, when the two sides of the pickled steel strip are blew, the pickling liquid on its surface is blown to both sides by the airflow and then falls into the collection box, which facilitates the collection of pickling liquid for subsequent treatment. This can effectively reduce the heavy metal pollution caused by pickling liquid to the environment, and also effectively reduce the waste of acid liquid.

[0018] 2. By setting up cleaning rollers, the steel strip can be cleaned a second time, effectively wiping away any residual moisture and pickling solution on its surface, thus increasing the blowing effect on the steel strip. At the same time, by setting up rotating rollers and adjusting rollers in combination, the movement trajectory of the steel strip can be changed, increasing the movement distance of the steel strip. This can improve the blowing effect of the high-pressure nozzles on the surface of the steel strip, while also effectively reducing the probability of pickling solution splashing out of the feed port when the airflow is blowing the pickling solution. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a perspective view of the main structure of a purging device for pickling steel strip according to this utility model;

[0021] Figure 2 This is a schematic diagram of the installation of a purging device and pickling tank for pickling steel strip according to the present invention;

[0022] Figure 3 This is a left view of the rear structure of a purging device for pickling steel strip according to this utility model;

[0023] Figure 4 This is a cross-sectional view of a purging device for pickling steel strips according to the present invention.

[0024] The labels in the diagram represent:

[0025] 100. Purge chamber; 200. Feed inlet; 210. Discharge outlet; 300. Collection mechanism; 310. Collection box; 311. Handle; 312. Sliding strip; 320. High-pressure air pipe; 321. High-pressure nozzle; 322. Air pump; 330. Cleaning roller; 331. Drive wheel; 332. Drive belt; 333. Drive motor; 340. Rotary roller; 350. Adjusting roller. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0027] The present invention will be further described below with reference to the embodiments.

[0028] In some embodiments, please refer to the appendix to the instruction manual. Figure 1-4A purging device for pickling steel strip includes a purging chamber 100 disposed on one side of the pickling tank, with an inlet 200 and an outlet 210 respectively disposed on both sides of the purging chamber 100; and a collection mechanism 300, which includes two high-pressure air pipes 320 fixedly connected to the inner wall of the purging chamber 100, with multiple high-pressure nozzles 321 connected to the surface of the high-pressure air pipes 320, and a collection box 310 disposed below the multiple high-pressure nozzles 321.

[0029] Purging is a mature and widely used auxiliary process in the field of steel strip pickling. Especially in the post-pickling cleaning stage, it uses high-pressure gas to remove residual acid, soften impurities and microparticles, avoid corrosion risks and improve surface cleanliness. Because purging cleans the surface of the steel strip with high-pressure gas, it will not negatively affect the mechanical properties of the steel strip. The impurities on the surface of the steel strip mainly include iron oxide scale, rolling oil stains and metal debris. After pickling, there may be some mechanical attachments and acid residues on the surface of the steel strip. However, these residues are usually attached to the surface of the steel strip along with the pickling solution and have low friction with the steel strip surface. After being sprayed by the airflow from the high-pressure nozzle, the impurities and pickling solution can be physically peeled off, and the purging cleaning will not affect the performance of the steel strip.

[0030] In some embodiments, such as Figure 1 , Figure 3 and Figure 4 As shown, in a preferred embodiment of this utility model, two high-pressure air pipes 320 are located on different horizontal lines of the same vertical line. High-pressure nozzles 321 on the two high-pressure air pipes 320 are arranged opposite each other. Multiple high-pressure nozzles 321 on the same high-pressure air pipe 320 are inclined. The high-pressure nozzle 321 in the middle is inclined towards the two high-pressure air pipes 320, while the high-pressure nozzles 321 on both sides are inclined towards the two high-pressure air pipes 320 and also towards both sides. An air pump 322 is fixedly connected to the back of the purge chamber 100. The two high-pressure air pipes 320 are connected to one air pump 322. Sliding strips 312 are fixedly connected to both sides of the collection box 310. The strip 312 is slidably inserted into the inner walls on both sides of the blow chamber 100. The surface of the collection box 310 is fixedly connected to the handle 311. The inside of the blow chamber 100 is provided with two sets of cleaning rollers 330. One end of the cleaning roller 330 is rotatably connected to the inner wall of the blow chamber 100 and the other end passes through the blow chamber 100 and is fixedly connected to the drive wheel 331. Each set of cleaning rollers 330 consists of two cleaning rollers 330 located on the same horizontal line. A drive belt 332 is provided between each set of drive wheels 331. Two drive motors 333 are fixedly connected to the back of the blow chamber 100. The two drive motors 333 are respectively fixedly connected to one of the drive wheels 331 in each set of drive wheels 331.

[0031] In this embodiment, when the steel strip passes through the high-pressure nozzle, the high-pressure nozzle located in the high-pressure air pipe 320 blows the pickling liquid in the middle of the steel strip surface to the rear and rear sides. At this time, the high-pressure nozzles located on both sides of the high-pressure air pipe 320 push the pickling liquid on both sides of the steel strip to the edge of the steel strip, so that it falls down. Because the airflow sprayed by the high-pressure nozzle has a wide coverage, it will continuously push the pickling liquid backward. When the pickling liquid falls down, it is always in front of the high-pressure nozzle and will not come into contact with the high-pressure nozzle.

[0032] The drive motor 333 drives one of the transmission wheels 331 to rotate, and the transmission wheel 331 drives the other transmission wheel 331 to rotate through the transmission belt 332. As a result, the two cleaning rollers 330 rotate in the same direction, while the two drive motors 333 rotate in opposite directions. The drive motor 333 located above rotates counterclockwise, and the drive motor 333 located below rotates clockwise. This makes the rotation direction of the two sets of cleaning rollers 330 opposite to the movement direction of the steel belt, thereby increasing the cleaning effect on the steel belt.

[0033] In some embodiments, such as Figure 1 , Figure 2 and Figure 4 As shown, in a preferred embodiment of the present invention, a rotating roller 340 is rotatably connected to the inner wall of the purge chamber 100, the rotating roller 340 is disposed below the feed inlet 200, and an adjusting roller 350 is rotatably connected to the inner wall of the purge chamber 100, the adjusting roller 350 is disposed between the rotating roller 340 and the high-pressure nozzle 321.

[0034] In this embodiment, when the steel strip enters from the feed inlet 200, the lower surface of the steel strip will contact the surface of the rotating roller 340. When the steel strip moves, it will drive the rotating roller 340 to rotate to reduce the friction between the steel strip and the feed inlet 200. The adjusting roller 350 is located above the midpoint between the two high-pressure air pipes 320 and at a certain distance, so that the steel strip tends to be horizontal when it enters the two cleaning rollers 330. At the same time, the high-pressure air pipes 320 and the cleaning rollers 330 are close to each other to avoid direct contact between the steel strip and the high-pressure nozzle, which would damage the high-pressure nozzle.

[0035] When using this utility model, first start the air pump 322 and drive motor 333, then introduce the pickled steel strip into the blowing chamber 100 through the feed port 200, so that the lower surface of the steel strip passes through the rotating roller 340 and then the upper surface of the steel strip passes under the adjusting roller 350 and then passes between the two high-pressure air pipes 320 and the two sets of cleaning rollers 330.

[0036] When the steel strip passes through the high-pressure air pipe 320, the pickling liquid and moisture on the upper and lower surfaces of the steel strip will move to both sides of the steel strip under the action of the high-pressure gas sprayed from the two high-pressure nozzles 321. The pickling liquid and moisture on the upper surface will fall into the collection box 310 under the action of gravity after moving to the edge of the steel strip. Some of the pickling liquid and moisture on the lower surface will fall directly into the collection box 310 under the action of gravity, some will be pushed to the edge of the steel strip by the high-pressure gas and then fall into the collection box 310, and some will fall into the collection box 310 during the repeated pushing process. After passing through the high-pressure nozzle, the steel strip will pass between two sets of cleaning rollers 330. The surface friction of the cleaning rollers 330 when they rotate will wipe away any moisture and pickling liquid that may remain on the surface.

[0037] After the steel strip is processed, the collection box 310 is pulled out of the purge chamber 100 by the handle 311, and then the waste collected inside is recycled.

[0038] It should be noted that the drive motor 333, air pump 322 and high-pressure nozzle mentioned above are all devices with relatively mature existing technology. The specific models can be selected according to actual needs. At the same time, the drive motor 333 and air pump 322 can be powered by the built-in power supply or by the mains power. The specific power supply method can be selected according to the situation, which will not be elaborated here.

[0039] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A purging device for pickling steel strip, comprising a purging chamber (100) disposed on one side of a pickling tank, wherein an inlet (200) and an outlet (210) are respectively disposed on both sides of the purging chamber (100), characterized in that: The collection mechanism (300) includes two high-pressure air pipes (320) fixedly connected to the inner wall of the purge chamber (100). The surface of the high-pressure air pipes (320) is connected to a plurality of high-pressure nozzles (321), and a collection box (310) is provided below the plurality of high-pressure nozzles (321).

2. The purging device for pickling steel strip according to claim 1, characterized in that, The two high-pressure air pipes (320) are located on different horizontal lines of the same vertical line, and the high-pressure nozzles (321) on the two high-pressure air pipes (320) are arranged opposite to each other.

3. The purging device for pickling steel strip according to claim 1, characterized in that, Multiple high-pressure nozzles (321) on the same high-pressure air pipe (320) are all inclined. The high-pressure nozzle (321) located in the middle is inclined between the two high-pressure air pipes (320), and the high-pressure nozzles (321) located on both sides are inclined between the two high-pressure air pipes (320) and also inclined to both sides.

4. The purging device for pickling steel strip according to claim 1, characterized in that, An air pump (322) is fixedly connected to the back of the purge chamber (100), and the two high-pressure air pipes (320) are connected to one air pump (322).

5. The purging device for pickling steel strip according to claim 1, characterized in that, The collection box (310) is fixedly connected to both sides of a slide bar (312), the slide bar (312) is slidably inserted into the inner walls of both sides of the purge chamber (100), and a handle (311) is fixedly connected to the surface of the collection box (310).

6. The purging device for pickling steel strip according to claim 1, characterized in that, The purge chamber (100) is equipped with two sets of cleaning rollers (330). One end of the cleaning roller (330) is rotatably connected to the inner wall of the purge chamber (100), and the other end extends through the purge chamber (100) and is fixedly connected to a drive wheel (331). Each set of cleaning rollers (330) consists of two cleaning rollers (330) located on the same horizontal line. A drive belt (332) is provided between each set of drive wheels (331).

7. The purging device for pickling steel strip according to claim 6, characterized in that, Two drive motors (333) are fixedly connected to the back of the purge chamber (100), and the two drive motors (333) are fixedly connected to one of the drive wheels (331) of each set of drive wheels (331).

8. The purging device for pickling steel strip according to claim 1, characterized in that, The inner wall of the purge chamber (100) is rotatably connected to a rotating roller (340), which is located below the feed inlet (200). The inner wall of the purge chamber (100) is rotatably connected to an adjusting roller (350), which is located between the rotating roller (340) and the high-pressure nozzle (321).

Images