A cold-rolled strip surface pickling device

Abstract

The utility model relates to cold-rolled strip steel pickling technical field, concretely relates to a cold-rolled strip steel surface pickling device, including the body, the body is installed with prewash pool and a plurality of pickling pool according to the strip steel material conveying direction in proper order, and the side of pickling pool close to prewash pool is provided with pressure roller spare, and pressure roller spare includes two pressure roller rods set up in up and down, and the first through -hole for the strip steel to pass through is arranged between two pressure roller rods set up in up and down, and the side of pickling pool far from prewash pool is provided with squeeze dry roller spare, and squeeze dry roller spare includes two squeeze dry roller rods set up in up and down, and the second through -hole for the strip steel to pass through is arranged between two squeeze dry roller rods set up in up and down, and the setting of pressure roller spare thereby realized to the strip steel first carries out a physical derusting, and the strip steel that passes through the first through -hole is extruded to two pressure roller rods set up in up and down face each other, and the surface oxide layer of strip steel is destroyed, improves the efficiency of strip steel derusting, and the subsequent pickling is convenient, and the pickling efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of pickling technology for cold-rolled strip steel, and in particular to a pickling device for the surface of cold-rolled strip steel. Background Technology

[0002] Pickling of cold-rolled strip steel involves using hydrochloric acid to remove the iron oxide scale from the surface of the raw material (hot-rolled strip steel), and then rinsing off the residual acid solution on the surface with desalinated water.

[0003] For example, a patent with publication number CN216838205U, entitled "A Pickling Device for Cold-Rolled Strip Steel that Can Be Thoroughly Cleaned," was published on June 28, 2022. It includes a pickling tank, a box mounted on one outer wall of the pickling tank via bolts, a cleaning tank mounted on one outer wall of the box via bolts, a drying box mounted on one outer wall of the cleaning tank via bolts, two support plates mounted on the top outer walls of the pickling tank and cleaning tank, and one outer wall of the drying box via bolts, with guide rollers mounted between adjacent support plates via bearings. Two conveying rollers are bolted inside the cleaning tank and pickling tank. However, the applicant discovered that during the pickling process, reactants adhere to the surface of the steel, reducing the pickling effect. Removing these reactants by scraping is limited, affecting pickling efficiency. Summary of the Invention

[0004] In view of this, the purpose of this utility model is to provide a pickling device for the surface of cold-rolled strip steel to solve the problem affecting pickling efficiency.

[0005] To achieve the above objectives, this utility model provides a surface pickling device for cold-rolled strip steel, comprising a main body. A pre-washing tank and multiple pickling tanks are sequentially installed on the main body according to the strip steel material conveying direction. A pressure roller assembly is provided on the side of the pickling tank closest to the pre-washing tank. The pressure roller assembly includes two vertically arranged pressure roller rods, with a first opening between the two vertically arranged pressure roller rods for the strip steel to pass through. A squeeze roller assembly is provided on the side of the pickling tank furthest from the pre-washing tank. The squeeze roller assembly includes two vertically arranged squeeze roller rods, with a second opening between the two vertically arranged squeeze roller rods for the strip steel to pass through.

[0006] Optionally, the size of the plurality of first openings is set to decrease sequentially according to the material conveying direction.

[0007] Optionally, the outer surface of the pressure roller may be uniformly provided with toothed protrusions.

[0008] Optionally, conveyor rollers are provided on both sides of the pre-washing tank.

[0009] Optionally, a rotating shaft is provided inside the pickling tank, a scraper is connected to the side wall of the rotating shaft, and a torsion spring is sleeved on the rotating shaft. The two ends of the torsion spring are respectively connected to the pickling tank and the scraper.

[0010] Optionally, the scraper is provided with inclined guide grooves on both sides of the end away from the rotating shaft.

[0011] The beneficial effects of this utility model are as follows: The cold-rolled strip steel surface pickling device provided by this utility model has a pre-washing tank that facilitates the pre-cleaning of easily removable impurities on the strip steel, which is convenient for subsequent pickling. At the same time, it reduces the obstruction to the operation of the pressure rollers. The setting of the pressure rollers enables the strip steel to undergo physical rust removal first. The two pressure rollers set at the top and bottom squeeze the strip steel passing through the first gate, destroying the oxide layer on the surface of the strip steel, solving the problem of incomplete rust removal of the strip steel, improving the efficiency of strip steel rust removal, facilitating subsequent pickling, and improving pickling efficiency. Attached Figure Description

[0012] 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 embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0015] Figure 3 for Figure 1 Enlarged structural diagram at point B.

[0016] In the diagram: 1. Main body; 2. Pre-wash tank; 3. Pickling tank; 4. Pressure roller; 5. Squeeze roller; 6. Scraper; 7. Inclined guide groove; 8. Rotary shaft. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0018] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] like Figures 1 to 3 As shown, a cold-rolled strip steel surface pickling device includes a main body 1. A pre-washing tank 2 and a plurality of pickling tanks 3 are sequentially installed on the main body 1 according to the strip steel material conveying direction. A pressure roller component is provided on the side of the pickling tank 3 near the pre-washing tank 2. The pressure roller component includes two pressure roller rods 4 arranged vertically. A first opening for the strip steel to pass through is provided between the two vertically arranged pressure roller rods 4. A squeeze roller component is provided on the side of the pickling tank 3 away from the pre-washing tank 2. The squeeze roller component includes two squeeze roller rods 5 arranged vertically. A second opening for the strip steel to pass through is provided between the two vertically arranged squeeze roller rods 5. The squeeze roller rods 5 facilitate the reduction of acid content on the surface of the strip steel.

[0020] The pre-washing tank 2 facilitates the pre-cleaning of easily removable impurities on the strip steel, making subsequent pickling easier and reducing obstruction to the operation of the pressure rollers. The setting of the pressure rollers enables the strip steel to undergo physical rust removal first. The two pressure rollers 4 set at the top and bottom squeeze the strip steel passing through the first gate, destroying the oxide layer on the surface of the strip steel, solving the problem of incomplete rust removal, improving the efficiency of strip steel rust removal, facilitating subsequent pickling, and improving pickling efficiency.

[0021] The size of the multiple first openings is set to decrease sequentially according to the material conveying direction, so that the strip steel material can be squeezed once before entering the pickling tank 3, and the strip steel can be physically derusted, destroying the surface oxide layer of the strip steel, solving the problem of incomplete rust removal of the strip steel, improving the efficiency of strip steel rust removal, and thus improving the pickling efficiency.

[0022] The number of pickling tanks 3 is three to five.

[0023] The pressure roller 4 has teeth evenly arranged on its outer surface. The teeth facilitate the breaking of the oxide layer on the surface of the strip steel, thereby improving the efficiency of strip steel rust removal.

[0024] Both sides of the pre-washing tank 2 are equipped with conveyor rollers to facilitate the guiding and transportation of the strip steel.

[0025] The pickling tank 3 is equipped with a rotating shaft 8, and a scraper 6 is connected to the side wall of the rotating shaft 8. A torsion spring is sleeved on the rotating shaft 8, and the two ends of the torsion spring are respectively connected to the pickling tank 3 and the scraper 6. The scraper 6 facilitates the scraping of the surface of the strip steel. When the surface of the strip steel is uneven, the strip steel swings the scraper 6 upward to achieve an elastic scraping effect. This can prevent the material from carrying the contaminants in the previous pickling tank 3 to the next pickling tank 3, thereby preventing cross-contamination of the pickling tanks 3.

[0026] Both sides of the scraper 6 away from the rotating shaft 8 are provided with inclined guide grooves 7, which facilitates the flow of water along the inclined guide grooves 7 to carry the attached material falling from the strip steel and reduce the accumulation of attached material on one side of the scraper 6.

[0027] The bottom of the pickling tank 3 is connected to a discharge pipe, which facilitates the easy discharge of pickling solution from the pickling tank 3. The bottom of the pickling tank 3 is inverted trapezoidal, and a filter screen is installed at the bottom of the pickling tank 3 to prevent large attached materials from clogging the discharge pipe.

[0028] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0029] The embodiments of this utility model are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pickling apparatus for cold-rolled strip steel, comprising a main body, characterized in that, The main body is equipped with a pre-washing tank and multiple pickling tanks in sequence according to the direction of strip material conveying. A pressure roller is provided on the side of the pickling tank near the pre-washing tank. The pressure roller includes two pressure roller rods arranged vertically, and a first opening for strip to pass through is provided between the two pressure roller rods. A squeeze roller is provided on the side of the pickling tank away from the pre-washing tank. The squeeze roller includes two squeeze roller rods arranged vertically, and a second opening for strip to pass through is provided between the two squeeze roller rods.

2. The cold-rolled strip steel surface pickling apparatus according to claim 1, characterized in that, The size of the multiple first openings is set to decrease sequentially according to the material conveying direction.

3. The cold-rolled strip steel surface pickling apparatus according to claim 1, characterized in that, The pressure roller rod has teeth evenly distributed on its outer surface.

4. The cold-rolled strip steel surface pickling apparatus according to claim 1, characterized in that, Conveyor rollers are installed on both sides of the pre-washing tank.

5. The cold-rolled strip steel surface pickling apparatus according to claim 1, characterized in that, The pickling tank is equipped with a rotating shaft, a scraper is connected to the side wall of the rotating shaft, and a torsion spring is sleeved on the rotating shaft. The two ends of the torsion spring are respectively connected to the pickling tank and the scraper.

6. The cold-rolled strip steel surface pickling apparatus according to claim 5, characterized in that, The scraper is provided with inclined guide grooves on both sides of the end away from the rotating shaft.

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