A defoaming device for a galvanizing cleaning section

Abstract

The application relates to a galvanizing cleaning section defoaming device, and belongs to the technical field of steel surface cleaning auxiliary equipment, which comprises a main pipe installed on one side of an alkali circulating tank, the lower end of the main pipe is communicated with the alkali circulating tank and is provided with a control pump, one side of the main pipe close to the alkali circulating tank is provided with a branch pipe facing the alkali circulating tank, the end of the branch pipe far from the main pipe is bent downward and inserted into the alkali circulating tank, a plurality of spray heads are arranged in the alkali circulating tank, and the spray heads are communicated with the end of the branch pipe inserted into the alkali circulating tank. The application has the effect of reducing the adverse influence on the galvanizing quality.

Description

Technical Field

[0001] This application relates to the technical field of auxiliary equipment for cleaning steel surfaces, and in particular to a defoaming device for a galvanizing cleaning section. Background Technology

[0002] The galvanizing cleaning section is a crucial step in the galvanizing process. It typically employs a combination of chemical and physical methods, where the strip passes sequentially through an alkaline spray tank, an alkaline brushing tank, an electrolytic cleaning tank, a hot water brushing tank, and a hot water rinsing tank. This process removes the rolling oil from the strip, primarily to create favorable conditions for subsequent galvanizing operations and ensure galvanizing quality.

[0003] During cleaning, a mixture of high-concentration degreasing agent, demineralized water, and alkaline solution is used as the medium, combined with physical cleaning methods such as spraying and brushing to remove rolling oil from the strip. The mixture in the alkaline spraying tank and alkaline brushing tank is returned to the alkaline circulation tank, and the mixture in the alkaline circulation tank can be transported through pipelines to the alkaline spraying tank and alkaline brushing tank for reuse.

[0004] When the mixture enters the alkali circulation tank, there is a large amount of foam formed by the high-concentration degreasing agent during the cleaning process. It is necessary to add defoamer to the alkali circulation tank to defoam the mixture in the alkali circulation tank.

[0005] Because defoamers contain silicon, related technologies use defoamers to defoam the mixture in the alkali circulation tank. When the mixture containing a large amount of defoamer is reused, it can easily affect the adhesion between the cleaned strip and the zinc layer, which may lead to strip dezincification and incomplete plating, thus affecting the quality of zinc plating. Utility Model Content

[0006] In order to reduce the adverse effects on galvanizing quality, this application provides a defoaming device for the galvanizing cleaning section.

[0007] The defoaming device for a galvanizing cleaning section provided in this application adopts the following technical solution: A defoaming device for a galvanizing cleaning section includes a main pipe installed on one side of an alkali circulation tank. The lower end of the main pipe is connected to the alkali circulation tank and is equipped with a control pump. A branch pipe is provided on the side of the main pipe near the alkali circulation tank, facing the alkali circulation tank. The end of the branch pipe away from the main pipe is bent downward and inserted into the alkali circulation tank. The alkali circulation tank is provided with multiple nozzles, all of which are connected to the end of the branch pipe inserted into the alkali circulation tank.

[0008] By adopting the above technical solution, the control pump draws the mixed solution in the alkali circulation tank into the main pipe. At this time, the main pipe transports high-pressure mixed solution, and through the branch pipe, part of the high-pressure mixed solution transported in the main pipe is transported to each nozzle in the alkali circulation tank, and sprayed onto the foam in the alkali circulation tank through the nozzle, thereby defoaming the generated foam, reducing the possibility of adding defoaming agent, and reducing the adverse effects on the galvanizing quality.

[0009] Optionally, the nozzles are configured as spiral nozzles and are evenly distributed in the alkali circulation tank.

[0010] By adopting the above technical solution, the branch pipe delivers the high-pressure mixture to the nozzle. At this time, the spiral nozzle sprays the high-pressure mixture onto the foam along the circumference of the nozzle, thereby increasing the contact area between the high-pressure mixture and the foam. This facilitates defoaming under the impact of the high-pressure mixture and reduces the adverse effects of adding defoamer on the galvanizing quality.

[0011] Optionally, a return pipe communicating with the inside of the alkali circulation tank is installed at one end of the upper side of the alkali circulation tank, an overflow pipe communicating with the inside of the alkali circulation tank is installed on the upper side of one end of the alkali circulation tank, and a nozzle is provided on the upper side of the inside of the alkali circulation tank near the overflow pipe and communicating with the main pipe.

[0012] By adopting the above technical solution, the mixed liquid in the alkaline spray washing tank and the alkaline brush washing tank is returned to the alkaline circulation tank through the return pipe and collected. When there is a lot of foam in the alkaline circulation tank and it moves to the lower side of the overflow pipe, the nozzle on the upper side of the overflow pipe sprays high-pressure mixed liquid onto the foam near the overflow pipe, reducing the possibility of foam overflowing through the overflow pipe, thereby reducing the waste of high-concentration degreasing agent and improving the utilization rate of the mixed liquid.

[0013] Optionally, a connecting pipe communicating with the main pipe is installed on the upper side of the nozzle near the overflow pipe. In the alkali circulation tank, all nozzles except the nozzle near the overflow pipe are arranged sequentially and evenly along the width direction of the alkali circulation tank. The nozzles arranged along the width direction of the alkali circulation tank are all equipped with the same mounting pipe communicating with the branch pipe. The branch pipe is provided with a moving part for driving the mounting pipe to move.

[0014] By adopting the above technical solution, the connecting pipe delivers the high-pressure mixture in the main pipe to the nozzle near the overflow pipe, which facilitates the nozzle to spray the foam that has moved to the overflow pipe, reducing the possibility of wasting high-concentration degreasing agent. When the other nozzles defoam the alkali circulation tank, the branch pipe delivers the high-pressure mixture to each nozzle. At this time, the moving part drives the nozzle on the mounting pipe to move along the length of the branch pipe, which facilitates the uniform spraying of the high-pressure mixture into the alkali circulation tank, thereby fully contacting the foam and defoaming it, improving work efficiency.

[0015] Optionally, the branch pipe includes a pipe body that communicates with the main pipe and a sliding pipe that is inserted into the pipe body and slidably connected to the pipe body. The end of the sliding pipe away from the pipe body is bent downward and communicates with and is fixedly connected to the mounting pipe. The alkali circulation tank is provided with an oblong hole that is adapted to the movement trajectory of the sliding pipe.

[0016] By adopting the above technical solution, the moving part drives the sliding tube to move closer to or further away from the tube body. At this time, the end of the sliding tube close to the installation tube slides in the waist-shaped hole, thereby driving the nozzle on the installation tube to move along the length of the branch pipe, which facilitates the high-pressure mixture to fully contact the foam and defoam, thus improving work efficiency.

[0017] Optionally, the moving component includes a hydraulic cylinder arranged along the length of the pipe body and fixedly connected to the pipe body, wherein the telescopic rod of the hydraulic cylinder faces the sliding pipe and is fixedly connected to one end of the sliding pipe away from the pipe body.

[0018] By adopting the above technical solution, the extension rod of the hydraulic cylinder extends or shortens, thereby driving the sliding tube to move the installation tube along the length of the branch pipe, which facilitates the full contact between the high-pressure mixture sprayed from the nozzle and the foam, making defoaming easier and improving work efficiency.

[0019] Optionally, a limiting ring is fixedly connected to the outer side of the sliding tube near one end of the tube body, and a limiting groove adapted to the limiting ring is provided on the inner wall of the tube body. The limiting ring is inserted into the limiting groove and slidably connected to the tube body.

[0020] By adopting the above technical solution, when the sliding tube slides, the limiting ring slides with the sliding tube in the limiting groove, reducing the possibility of the sliding tube detaching from the tube body. At the same time, it seals the gap between the sliding tube and the tube body, reducing the possibility of high-pressure mixture spraying out through the gap between the sliding tube and the tube body, reducing mixture waste and improving utilization rate.

[0021] Optionally, the inner radial direction of the limiting ring, closer to the tube body, gradually increases towards the side away from the sliding tube.

[0022] By adopting the above technical solution, the shape of the limiting ring makes the inner wall of the limiting ring gradually inclined inward towards the side closer to the sliding tube, which facilitates the guidance of the high-pressure mixture in the tube body, further reduces the possibility of the high-pressure mixture being sprayed out through the gap between the sliding tube and the tube body, reduces mixture waste, and improves utilization rate.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. The control pump draws the mixture in the alkali circulation tank into the main pipe. At this time, the main pipe delivers high-pressure mixture. Through the branch pipe, part of the high-pressure mixture delivered in the main pipe is delivered to each nozzle in the alkali circulation tank and sprayed onto the foam in the alkali circulation tank, thereby defoaming the generated foam, reducing the possibility of adding defoamer, and reducing the adverse effects on the galvanizing quality. 2. When there is a lot of foam in the alkali circulation tank and it moves to the bottom of the overflow pipe, the nozzle on the top of the overflow pipe sprays high-pressure mixed liquid onto the foam near the overflow pipe, reducing the possibility of foam overflowing through the overflow pipe, thereby reducing the waste of high-concentration degreasing agent and improving the utilization rate of the mixed liquid. 3. The moving part drives the sliding tube to move closer to or further away from the tube body. At this time, the end of the sliding tube close to the mounting tube slides in the oblong hole, thereby driving the nozzle on the mounting tube to move along the length of the branch pipe, so that the high-pressure mixture can fully contact the foam and defoam, thus improving work efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the defoaming device in the galvanizing cleaning section of Embodiment 1 of this application.

[0025] Figure 2 This is a structural schematic diagram illustrating the positional relationship between the nozzle and the overflow pipe in Embodiment 1 of this application.

[0026] Figure 3 This is a structural schematic diagram illustrating the positional relationship between the moving part and the overflow pipe in Embodiment 2 of this application.

[0027] Figure 4 This is a structural schematic diagram illustrating the positional relationship between the moving part and the nozzle in Embodiment 2 of this application.

[0028] Figure 5 This is a structural schematic diagram illustrating the positional relationship between the tube body and the sliding tube in Embodiment 2 of this application.

[0029] Explanation of reference numerals in the attached drawings: 1. Alkali circulation tank; 11. Return pipe; 12. Overflow pipe; 13. Waist-shaped hole; 2. Main pipe; 21. Control pump; 22. Fixed pipe; 23. Connecting pipe; 3. Branch pipe; 31. Pipe body; 311. Limiting groove; 32. Sliding pipe; 321. Limiting ring; 4. Nozzle; 41. Mounting pipe; 42. Connecting pipe; 43. Stabilizing pipe; 5. Hydraulic cylinder. Detailed Implementation

[0030] The present application will be further described in detail below with reference to the accompanying drawings.

[0031] This application discloses a defoaming device for a galvanizing cleaning section. Example 1

[0032] Reference Figure 1 and Figure 2 A vertical return pipe 11, which is connected to the inside of the alkali circulation tank 1, is fixedly connected to one end of the upper side of the alkali circulation tank 1. A defoaming device for a galvanizing cleaning section includes a vertical main pipe 2 located on the side of the alkali circulation tank 1 away from the return pipe 11 and conveying a mixed liquid to the alkali spray washing tank and the alkali brush washing tank. A control pump 21 is installed at the lower end of the main pipe 2, and a horizontal fixed pipe 22 is installed on the lower side of the control pump 21. The end of the fixed pipe 22 near the alkali circulation tank 1 is inserted into the alkali circulation tank 1 and fixedly connected to the alkali circulation tank 1. At this time, the fixed pipe 22 is connected to the inside of the alkali circulation tank 1 and is connected to the main pipe 2 through the control pump 21.

[0033] Reference Figure 1 and Figure 2 The main pipe 2 is fixedly connected to and communicates with a horizontal branch pipe 3 arranged along the length of the alkali circulation tank 1 on the side near the main pipe 2. The branch pipe 3 is located on the upper side of the alkali circulation tank 1, and the end of the branch pipe 3 away from the main pipe 2 is bent downward at a right angle and inserted into the alkali circulation tank 1. The alkali circulation tank 1 is provided with multiple nozzles 4. In this embodiment, there are eight nozzles, all of which are spiral nozzles. The nozzles 4 are arranged in two rows, with four nozzles 4 in each row, arranged sequentially along the width of the alkali circulation tank 1.

[0034] Each row of nozzles 4 is provided with a horizontal mounting pipe 41 located inside the alkali circulation tank 1 and along the width of the alkali circulation tank 1. The mounting pipe 41 is fixedly connected to and communicates with the upper side of the corresponding nozzle 4. The middle part of the mounting pipes 41 that are close to each other is fixedly connected to and communicates with a connecting pipe 42 that connects the two. The upper side of the mounting pipe 41 that is close to the return pipe 11 is fixedly connected to and communicates with one end of the branch pipe 3 that is inserted into the alkali circulation tank 1.

[0035] The mixture in the alkaline spray washing tank and the alkaline brush washing tank is returned to the alkaline circulation tank 1 through the return pipe 11 and collected. The control pump 21 draws the mixture in the alkaline circulation tank 1 into the main pipe 2 through the fixed pipe 22. At this time, the main pipe 2 delivers high-pressure mixture. Through the branch pipe 3, the installation pipe 41 and the connecting pipe 42, part of the high-pressure mixture delivered in the main pipe 2 is delivered to each nozzle 4 in the alkaline circulation tank 1 and sprayed onto the foam in the alkaline circulation tank 1 through the nozzle 4, thereby defoaming the generated foam.

[0036] The nozzle 4 is configured as a spiral nozzle, which allows the high-pressure mixture to be sprayed onto the foam along the circumference of the nozzle 4, thereby increasing the contact area between the high-pressure mixture and the foam, and facilitating defoaming under the impact of the high-pressure mixture.

[0037] Reference Figure 1 and Figure 2An overflow pipe 12, which communicates with the interior of the alkali circulation tank 1, is fixedly connected to the upper side of the end away from the main pipe 2. The end of the overflow pipe 12 away from the alkali circulation tank 1 is bent downwards to a vertical position. Inside the alkali circulation tank 1, on the side near the overflow pipe 12, there is a nozzle 4 located on the upper side of the overflow pipe 12. In this embodiment, it is also set as a spiral nozzle, and a vertical stabilizing pipe 43 is fixedly connected and communicated to its upper side. The upper end of the stabilizing pipe 43 passes through the alkali circulation tank 1 and bends to a horizontal position towards the branch pipe 3. The bent end of the stabilizing pipe 43 is fixedly connected and communicated with the branch pipe 3.

[0038] When there is a lot of foam in the alkali circulation tank 1 and it moves to the lower side of the overflow pipe 12, the branch pipe 3 delivers the high-pressure mixture through the stabilizing pipe 43 to the nozzle 4 on the upper side of the overflow pipe 12, thereby spraying the high-pressure mixture onto the foam near the overflow pipe 12, reducing the possibility of foam overflowing through the overflow pipe 12, thereby reducing the waste of high-concentration degreasing agent and improving the utilization rate of the mixture.

[0039] The implementation principle of Example 1 is as follows: a portion of the high-pressure mixed liquid transported in the main pipe 2 is transported to each nozzle 4 in the alkali circulation tank 1 through the branch pipe 3, the installation pipe 41 and the connecting pipe 23, and sprayed onto the foam in the alkali circulation tank 1 through the nozzle 4, thereby defoaming the generated foam; when there is a lot of foam in the alkali circulation tank 1 and it moves to the lower side of the overflow pipe 12, the nozzle 4 on the upper side of the overflow pipe 12 sprays high-pressure mixed liquid onto the foam near the overflow pipe 12, reducing the possibility of foam overflowing through the overflow pipe 12. Example 2

[0040] Reference Figure 3 and Figure 4 The difference between this embodiment and embodiment 1 is that a horizontal connecting pipe 23 is provided on the upper side of the branch pipe 3, which is fixedly connected to and communicates with the side wall of the main pipe 2. One bent end of the stabilizing pipe 43 is fixedly connected to and communicates with the end of the connecting pipe 23 away from the main pipe 2. In this embodiment, except for the nozzle 4 near the overflow pipe 12, the remaining nozzles 4 are set as four and are arranged evenly in sequence along the width direction of the alkali circulation tank 1. The upper side of the remaining nozzles 4, except for the nozzle 4 near the overflow pipe 12, is fixedly connected to and communicates with the same horizontal mounting pipe 41 arranged along the width direction of the alkali circulation tank 1.

[0041] Branch pipe 3 includes a horizontal pipe body 31 fixedly connected to and communicating with main pipe 2 and located below connecting pipe 23, and a sliding pipe 32 located on the side of pipe body 31 near return pipe 11. The end of sliding pipe 32 away from main pipe 2 is bent downward and located in the middle of the upper side of mounting pipe 41. An oblong hole 13 is provided on the upper side of alkali circulation tank 1 along the length of alkali circulation tank 1. The bent end of sliding pipe 32 is inserted into alkali circulation tank 1 through oblong hole 13 and fixedly connected to and communicating with the upper side of mounting pipe 41. The end of sliding pipe 32 near pipe body 31 is inserted into pipe body 31 and slidably connected to pipe body 31. Pipe body 31 is provided with a moving part for driving sliding pipe 32 to move.

[0042] The connecting pipe 23 transports the high-pressure mixture in the main pipe 2 through the stabilizing pipe 43 to the nozzle 4 near the overflow pipe 12, so that the nozzle 4 can spray the foam that has moved to the overflow pipe 12, reducing the possibility of wasting high-concentration degreasing agent. When the other nozzles 4 defoam the alkali circulation tank 1, the branch pipe 3 transports the high-pressure mixture to each nozzle 4. The moving part drives the sliding pipe 32 to move closer to or away from the pipe body 31. At this time, the end of the sliding pipe 32 near the mounting pipe 41 slides in the waist-shaped hole 13, thereby driving the nozzle 4 on the mounting pipe 41 to move along the length of the branch pipe 3, so as to evenly spray the high-pressure mixture into the alkali circulation tank 1, thereby fully contacting the foam and defoaming it.

[0043] Reference Figure 4 and Figure 5 A ring-shaped limiting ring 321 with an outer diameter larger than that of the sliding tube 32 is fixedly connected to one end of the sliding tube 32 near the tube body 31. A limiting groove 311, adapted to the limiting ring 321 and arranged along the length of the tube body 31, is formed on the inner wall of the tube body 31. The limiting ring 321 is inserted into the limiting groove 311 and contacts the inner wall of the tube body 31. The inner diameter of the limiting ring 321 gradually increases from the side away from the sliding tube 32 towards the side closer to the main tube 2. In this embodiment, the moving part is a hydraulic cylinder 5 fixedly connected to the upper side of the tube body 31 and arranged along the length of the tube body 31. The telescopic rod of the hydraulic cylinder 5 faces the sliding tube 32 and is fixedly connected to the upper side of the sliding tube 32.

[0044] The extension or retraction rod of the hydraulic cylinder 5 extends or retracts, thereby driving the sliding tube 32 to move the mounting tube 41 along the length of the branch tube 3, so that the high-pressure mixture sprayed from the nozzle 4 can fully contact the foam, which facilitates defoaming.

[0045] The limiting ring 321 slides in the limiting groove 311 with the sliding tube 32, reducing the possibility of the sliding tube 32 detaching from the tube body 31, and sealing the gap between the sliding tube 32 and the tube body 31. The shape of the limiting ring 321 makes the inner wall of the limiting ring 321 form an inclined surface that gradually slopes inward toward the side closer to the sliding tube 32, which facilitates the guidance of the high-pressure mixture in the tube body 31 and reduces the possibility of the high-pressure mixture being sprayed out through the gap between the sliding tube 32 and the tube body 31.

[0046] The implementation principle of Example 2 is as follows: the branch pipe 3 delivers the high-pressure mixture to each nozzle 4, driving the sliding pipe 32 to move towards or away from the pipe body 31. At this time, the end of the sliding pipe 32 near the mounting pipe 41 slides in the waist-shaped hole 13, thereby driving the nozzle 4 on the mounting pipe 41 to move along the length of the branch pipe 3, so as to evenly spray the high-pressure mixture into the alkali circulation tank 1, thereby fully contacting the foam and defoaming.

[0047] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A defoaming device for a galvanizing cleaning section, characterized in that: The system includes a main pipe (2) installed on one side of the alkali circulation tank (1), the lower end of which is connected to the alkali circulation tank (1) and is equipped with a control pump (21). The side of the main pipe (2) near the alkali circulation tank (1) is provided with a branch pipe (3) facing the alkali circulation tank (1). The end of the branch pipe (3) away from the main pipe (2) is bent downward and inserted into the alkali circulation tank (1). The alkali circulation tank (1) is provided with multiple nozzles (4), and each nozzle (4) is connected to the end of the branch pipe (3) inserted into the alkali circulation tank (1).

2. The defoaming device for a galvanizing cleaning section according to claim 1, characterized in that: The nozzle (4) is configured as a spiral nozzle and is evenly distributed in the alkali circulation tank (1).

3. The defoaming device for a galvanizing cleaning section according to claim 2, characterized in that: One end of the alkali circulation tank (1) is equipped with a return pipe (11) that communicates with the inside of the alkali circulation tank (1). One end of the alkali circulation tank (1) is equipped with an overflow pipe (12) that communicates with the inside of the alkali circulation tank (1). The upper side of the inside of the alkali circulation tank (1) is provided with a nozzle (4) that is close to the overflow pipe (12) and communicates with the main pipe (2).

4. The defoaming device for a galvanizing cleaning section according to claim 3, characterized in that: A connecting pipe (23) connected to the main pipe (2) is installed on the upper side of the nozzle (4) near the overflow pipe (12). In the alkali circulation tank (1), except for the nozzle (4) near the overflow pipe (12), all other nozzles (4) are arranged sequentially and evenly along the width direction of the alkali circulation tank (1). The nozzles (4) arranged along the width direction of the alkali circulation tank (1) are all equipped with the same mounting pipe (41) connected to the branch pipe (3). The branch pipe (3) is provided with a moving part that drives the mounting pipe (41) to move.

5. The defoaming device for a galvanizing cleaning section according to claim 4, characterized in that: The branch pipe (3) includes a pipe body (31) that communicates with the main pipe (2) and a sliding pipe (32) that is inserted into the pipe body (31) and slidably connected to the pipe body (31). The end of the sliding pipe (32) away from the pipe body (31) is bent downward and communicated with and fixedly connected to the mounting pipe (41). The alkali circulation tank (1) is provided with a waist-shaped hole (13) that is adapted to the movement trajectory of the sliding pipe (32).

6. The defoaming device for a galvanizing cleaning section according to claim 5, characterized in that: The moving part includes a hydraulic cylinder (5) arranged along the length direction of the pipe body (31) and fixedly connected to the pipe body (31). The telescopic rod of the hydraulic cylinder (5) is directed toward the sliding pipe (32) and fixedly connected to one end of the sliding pipe (32) away from the pipe body (31).

7. The defoaming device for a galvanizing cleaning section according to claim 6, characterized in that: The sliding tube (32) is fixedly connected to a limiting ring (321) on the outer side of one end near the tube body (31). A limiting groove (311) adapted to the limiting ring (321) is provided on the inner side wall of the tube body (31). The limiting ring (321) is inserted into the limiting groove (311) and slidably connected to the tube body (31).

8. The defoaming device for a galvanizing cleaning section according to claim 7, characterized in that: The inner radial direction of the limiting ring (321) on the side closer to the tube body (31) and further away from the sliding tube (32) gradually increases.

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