Foam gathering device for cold-rolled strip steel cleaning line

Abstract

A foam gathering device for a cold-rolled strip steel cleaning line comprises a limiting plate fixedly arranged at the top of an alkali liquor box and extending towards the middle of the alkali liquor box and a foam scraper rotating around the central axis of the alkali liquor box, the foam scraper comprises two fixedly connected single plates, and an included angle is reserved between the two single plates to form a gathering area. And in the rotating process of the foam scraping plate, foam on the surface of alkali liquor in the alkali liquor box can be gathered into the gathering area, the foam is pushed to the limiting plate, and an air spraying assembly is further arranged on the single plate and used for spraying air flow into the gathering area. The utility model provides a foam gathering device for a cold-rolled strip steel cleaning line, which can gather foam at the top of an alkali liquor box into an enrichment area, is convenient for foam elimination equipment to process the foam and improves the foam elimination efficiency.

Description

Technical Field

[0001] This utility model relates to the field of strip steel production technology, specifically a foam aggregation device for a cold-rolled strip steel cleaning line. Background Technology

[0002] Alkaline washing is an essential step in strip steel production, removing rolling oil, leveling fluid, and other impurities from the strip surface to improve its cleanliness. However, after prolonged use, the alkaline solution accumulates a large amount of grease and sediment, affecting the cleaning effect. The alkaline washing process also generates a large amount of foam, leading to alkali loss and environmental pollution. To avoid increasing costs associated with discharging and treating the alkaline solution and to improve the washing environment, it is necessary to defoam, purify, and degrease the solution to achieve its recycling.

[0003] In existing technology, a defoaming device is installed at the top of the alkali tank to defoam the alkali solution. This device can extract foam from the top of the tank and then treat it. However, because the foam is dispersed at the top of the tank, and the defoaming device is located on the side, the amount of foam that can be extracted is limited, resulting in some foam remaining untreated. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a foam gathering device for cold-rolled strip steel cleaning lines, which can gather foam from the top of the alkali tank into the enrichment area, facilitating foam removal equipment to process the foam and improving the efficiency of foam removal.

[0005] To achieve the above objectives, the specific solution adopted by this utility model is as follows: a foam gathering device for a cold-rolled strip steel cleaning line, comprising a limiting plate fixedly installed on the top of the alkali tank and extending towards the center of the alkali tank, and a foam scraper rotating around the central axis of the alkali tank. The foam scraper comprises two fixedly connected individual plates, and an included angle is left between the two individual plates to form a gathering area. During the rotation of the foam scraper, the foam on the surface of the alkali in the alkali tank can be gathered into the gathering area and pushed towards the limiting plate. An air jet assembly is also provided on the individual plate, which is used to spray airflow into the gathering area.

[0006] As a further optimization of the foam gathering device for the above-mentioned cold-rolled strip steel cleaning line: the device includes a conical top fixedly installed at the top of the alkali tank, the small end of the conical top is set upward and closed by a top plate, a rotating shaft is rotatably installed on the top plate, and the rotating shaft extends downward into the alkali tank and is then fixedly connected to the foam scraper.

[0007] As a further optimization of the foam gathering device for the above-mentioned cold-rolled strip cleaning line: an air supply channel is provided on the rotating shaft, and the air supply channel is connected to the jet assembly.

[0008] As a further optimization of the foam gathering device for the above-mentioned cold-rolled strip steel cleaning line: the lower end of the rotating shaft is fixedly connected to the mounting block, the foam scraper is fixedly connected to the mounting block, and the middle part of the mounting block is provided with a diversion cavity that communicates with the air supply channel, and the diversion cavity is connected to the air supply component.

[0009] As a further optimization of the foam gathering device for the above-mentioned cold-rolled strip cleaning line: the air supply component includes a fixing strip fixedly installed on the single plate, the fixing strip having an air guiding channel, the air guiding channel being connected to the diversion cavity through a diversion channel opened on the mounting block, and the single plate also having multiple air jet holes, the air jet holes being connected to the air guiding channel and facing the gathering area.

[0010] As a further optimization of the foam gathering device for a cold-rolled strip cleaning line described above: a baffle is fixedly connected between the ends of the two individual plates that are away from the mounting block.

[0011] As a further optimization of the foam gathering device for the above-mentioned cold-rolled strip cleaning line: the mounting block is rectangular, and the foam scraper is fixedly connected to one of the side walls of the mounting block.

[0012] As a further optimization of the foam gathering device for the above-mentioned cold-rolled strip cleaning line: a distance is left between the mounting block and the limiting plate.

[0013] As a further optimization of the foam gathering device for the above-mentioned cold-rolled strip cleaning line: each of the two individual plates is fixedly connected to an extension plate, the extension plate is parallel to the surface of the alkali solution, and a distance is left between the two extension plates.

[0014] As a further optimization of the foam gathering device for the above-mentioned cold-rolled strip cleaning line: the end of the foam scraper away from the central axis of the alkali tank is close to the inner wall of the alkali tank.

[0015] Beneficial effects: This invention can gather the foam at the top of the alkali tank into the enrichment area, making it easier for the foam elimination equipment to process the foam and improving the efficiency of foam elimination. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of a foam scraper;

[0018] Figure 3 This is a schematic diagram of the jet assembly;

[0019] Figure 4 This is a structural diagram of the mounting block.

[0020] Figure descriptions: 1-Alkali tank, 2-Conical top, 3-Top plate, 4-Rotating shaft, 5-Gas supply channel, 6-Mounting block, 7-Foam scraper, 8-Baffle, 9-Gathering area, 10-Limiting plate, 11-Fixing strip, 12-Gas guide channel, 13-Jet nozzle, 14-Extension plate, 15-Diverting chamber, 16-Diverting channel. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figure 1 and Figure 3 As shown, a foam gathering device for a cold-rolled strip steel cleaning line includes a limiting plate 10 fixedly installed on the top of an alkali tank 1 and extending towards the center of the alkali tank 1, and a foam scraper 7 rotating around the central axis of the alkali tank 1. The foam scraper 7 includes two fixedly connected single plates, and an included angle is left between the two single plates to form a gathering area 9. During the rotation of the foam scraper 7, it can gather the foam on the surface of the alkali in the alkali tank 1 into the gathering area 9 and push the foam towards the limiting plate 10. An air jet assembly is also provided on the single plate, which is used to spray airflow into the gathering area 9.

[0023] During the cleaning of the strip steel, a large amount of foam forms at the top of the alkali tank 1. Once a certain amount of foam accumulates, the foam scraper 7 is driven to rotate. After contacting the foam, the scraper 7 collects the foam into the converging area 9. Two individual plates with an included angle prevent the foam from crossing the plates. Simultaneously, airflow is injected into the converging area 9 via an air jet assembly, further preventing the foam from crossing the scraper 7 and ensuring that as much foam as possible is gathered into the converging area 9. The scraper 7 continues to rotate, pushing the foam in the converging area 9 until it approaches the limiting plate 10. There, the foam is confined by the limiting plate 10 and the scraper 7 from both sides, thus restricting the foam to a certain area, which can be called the enrichment area. After the foam is gathered into the enrichment area, a foam removal device can extract the foam from the enrichment area for further processing. The foam removal device is conventional technology in this field, and this application does not claim protection for it; therefore, it will not be described in detail here.

[0024] This invention can gather the foam at the top of the alkali tank 1 into the enrichment area, making it easier for the foam elimination equipment to process the foam and improving the efficiency of foam elimination.

[0025] To facilitate the rotation of the foam scraper 7, the device includes a conical top 2 fixedly mounted at the top of the alkali tank 1. The smaller end of the conical top 2 faces upward and is sealed by a top plate 3. A rotating shaft 4 is rotatably mounted on the top plate 3, extending downward into the alkali tank 1 and then fixedly connected to the foam scraper 7. After a certain amount of alkali has accumulated at the top of the alkali tank 1, the rotating shaft 4 is driven to rotate from the outside of the alkali tank 1, thereby driving the foam scraper 7 to rotate. A rotational seal is required between the rotating shaft 4 and the top plate 3; the specific methods are conventional and will not be described in detail here. Based on this method, the airtightness of the alkali tank 1 can be guaranteed. From the outside of the alkali tank 1, the rotating shaft 4 can be directly driven to rotate using conventional drive devices such as motors, or driven by transmission methods such as belt drives and chain drives; these are all conventional technologies and will not be described in detail here.

[0026] To facilitate gas delivery to the jet assembly and ensure a stable airflow, a gas supply channel 5 is provided on the rotating shaft 4, which is connected to the jet assembly. By providing the gas supply channel 5, both the gas source and the gas supply pipeline can be located outside the alkali tank 1, which avoids corrosion from the alkali solution and ensures the airtightness of the alkali tank 1.

[0027] like Figure 4As shown, the specific connection method between the rotating shaft 4 and the foam scraper 7 is as follows: a mounting block 6 is fixedly connected to the lower end of the rotating shaft 4, the foam scraper 7 is fixedly connected to the mounting block 6, and a diversion cavity 15 communicating with the air supply channel 5 is opened in the middle of the mounting block 6. The diversion cavity 15 is connected to the air supply assembly. Furthermore, the mounting block 6 is rectangular, the foam scraper 7 is fixedly connected to one side wall of the mounting block 6, and a distance is left between the mounting block 6 and the limiting plate 10.

[0028] The specific structure of the air supply assembly is as follows: The air supply assembly includes a fixing strip 11 fixedly mounted on a single unit plate. An air guide channel 12 is provided on the fixing strip 11. The air guide channel 12 is connected to a distribution chamber 15 via a distribution channel 16 provided on the mounting block 6. Multiple air jet holes 13 are also provided on the single unit plate. The air jet holes 13 are connected to the air guide channel 12 and face the converging area 9. Several fixing strips 11 can be provided. The air guide channel 12 on each fixing strip 11 is connected to the distribution chamber 15 via a distribution channel 16. Gas supplied by the air source enters the distribution chamber 15 through the air supply channel 5, then enters the air guide channel 12 through the distribution channel 16, and is finally ejected from the air jet hole 13. Each air guide channel 12 can connect to multiple air jet holes 13, enabling the air jet assembly to eject multiple airflows from multiple different positions towards the foam, resulting in a wider effective range. This effectively prevents the foam from bypassing the foam scraper 7, ensuring that the foam scraper 7 can smoothly push the foam into the enrichment area.

[0029] like Figure 2 As shown, furthermore, the end of the foam scraper 7 furthest from the central axis of the alkali tank 1 is close to the inner wall of the alkali tank 1, and a baffle 8 is fixedly connected between the ends of the two individual plates furthest from the mounting block 6. By leaving a certain distance between the foam scraper 7 and the inner wall of the alkali tank 1, long-term contact and friction between the foam scraper 7 and the inner wall of the alkali tank 1 can be avoided, thereby extending the service life of the foam scraper 7 and preventing damage to the alkali tank 1. On this basis, by setting the baffle 8, foam in the collection area 9 can be prevented from flowing out from the gap between the foam scraper 7 and the inner wall of the alkali tank 1, ensuring that the foam scraper 7 can smoothly push the foam into the enrichment area.

[0030] In order to expand the capacity of the aggregation area 9 and enable the foam scraper 7 to push more foam into the enrichment area in one operation, each of the two individual plates is fixedly connected with an extension plate 14. The extension plate 14 is parallel to the surface of the alkali solution and there is a distance between the two extension plates 14.

[0031] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A foam collection device for a cold rolled strip cleaning line, characterized in that, The device comprises a limiting plate (10) fixedly arranged on the top of the lye tank (1) and extending to the middle of the lye tank (1), and a foam scraping plate (7) rotating around the central axis of the lye tank (1), wherein the foam scraping plate (7) comprises two single plates fixedly connected and has an included angle between the two single plates to form a converging area (9), the foam scraping plate (7) can converge the foam on the surface of the lye in the lye tank (1) into the converging area (9) during rotation and push the foam to the limiting plate (10), and a gas injection assembly is arranged on the single plate to inject gas flow into the converging area (9).

2. A foam collection device for a cold rolled strip cleaning line as claimed in claim 1, characterized in that The device comprises a conical top (2) fixedly arranged on the top end of the lye tank (1), wherein the small end of the conical top (2) is arranged upward and is closed by a top plate (3), a rotating shaft (4) is rotatably arranged on the top plate (3), and the rotating shaft (4) extends downward into the lye tank (1) and is fixedly connected with the foam scraping plate (7).

3. A foam collection device for a cold rolled strip cleaning line as claimed in claim 2, characterized in that A gas supply channel (5) is arranged on the rotating shaft (4) and communicates with the gas injection assembly.

4. A foam collection device for a cold rolled strip cleaning line as claimed in claim 3, characterized in that The lower end of the rotating shaft (4) is fixedly connected with a mounting block (6), the foam scraping plate (7) is fixedly connected with the mounting block (6), a shunt cavity (15) is arranged in the middle of the mounting block (6) and communicates with the gas supply channel (5), and the shunt cavity (15) communicates with the gas injection assembly.

5. A foam collection device for a cold rolled strip cleaning line as claimed in claim 4, characterized in that The gas injection assembly comprises a fixed strip (11) fixedly arranged on the single plate, a gas guide channel (12) is arranged on the fixed strip (11), the gas guide channel (12) communicates with the shunt cavity (15) through a shunt channel (16) arranged on the mounting block (6), and a plurality of gas injection holes (13) are arranged on the single plate and communicate with the gas guide channel (12) and face the converging area (9).

6. A foam collection device for a cold rolled strip cleaning line as claimed in claim 4, characterized in that The ends of the two single plates away from the mounting block (6) are fixedly connected with a baffle (8).

7. A foam collection device for a cold rolled strip cleaning line as claimed in claim 4, characterized in that, The mounting block (6) is in the shape of a cuboid, and the foam scraping plate (7) is fixedly connected with one of the side walls of the mounting block (6).

8. A foam collection device for a cold rolled strip cleaning line as claimed in claim 4, characterized in that, The mounting block (6) is spaced apart from the limiting plate (10).

9. A foam collection device for a cold rolled strip cleaning line as claimed in claim 1, characterized in that, Each of the two single plates is fixedly connected with an extension plate (14), the extension plates (14) are parallel to the surface of the lye, and the two extension plates (14) are spaced apart.

10. A foam collection device for a cold rolled strip cleaning line as claimed in claim 1, characterized in that, The end of the foam scraping plate (7) away from the central axis of the lye tank (1) is close to the inner wall of the lye tank (1).

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