Mechanical defoaming device for galvanizing cleaning section

Abstract

The application relates to a mechanical defoaming device for a galvanization cleaning section, and belongs to the technical field of galvanization. The device comprises a suction pipe arranged in a circulating tank and used for sucking foam, a liquid feeding pipe arranged in the circulating tank and used for feeding defoamed lye into the circulating tank, a lower end of the liquid feeding pipe being inserted into the lye in the circulating tank, and a defoaming assembly arranged between the suction pipe and the liquid feeding pipe and used for connecting the two. The application has the effect of reducing the adverse influence on the degreasing efficiency.

Description

Technical Field

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

[0002] The galvanizing cleaning section typically employs a combination of chemical and physical methods. The strip passes sequentially through an alkaline spray washing tank, an alkaline brush washing tank, an electrolytic cleaning tank, a hot water brush washing tank, and a hot water rinsing tank. A 2%-4% alkaline degreasing agent solution (hereinafter referred to as "alkaline solution") prepared from a high-concentration degreasing agent and demineralized water is used as the medium, combined with physical cleaning methods such as spraying and brushing, to remove the rolling oil from the strip. The alkaline solution in the alkaline spray washing tank and the alkaline brush washing tank is returned to the alkaline circulation tank, and the alkaline solution in the alkaline circulation tank can be transported through pipelines to the alkaline spray washing tank and the alkaline brush washing tank for reuse.

[0003] When the alkali solution enters the alkali circulation tank, there is a large amount of foam formed by the high-concentration degreasing agent during the cleaning process. When the alkali solution in the circulation tank is transported to the cleaning section for reuse, the foam moves to the cleaning section with the alkali solution. This may cause the foam to hinder the alkali solution from fully contacting the surface of the strip steel, thus reducing the degreasing efficiency. Utility Model Content

[0004] In order to reduce the adverse effects on degreasing efficiency, this application provides a mechanical defoaming device for the galvanizing cleaning section.

[0005] The mechanical defoaming device for a galvanizing cleaning section provided in this application adopts the following technical solution: A mechanical defoaming device for a galvanizing cleaning section includes an extraction pipe installed in a circulation tank to extract foam, a delivery pipe in the circulation tank to deliver defoamed alkaline solution into the circulation tank, the lower end of the delivery pipe being inserted into the alkaline solution in the circulation tank, and a defoaming assembly connecting the extraction pipe and the delivery pipe.

[0006] By adopting the above technical solution, the foam in the circulation box is moved to the defoaming component through the extraction pipe. The alkaline solution formed after defoaming by the defoaming component is transported to the circulation box through the delivery pipe. The position of the lower end of the delivery pipe makes it difficult for the defoamed alkaline solution to generate foam again during the transportation process, thereby reducing the adverse effects on degreasing efficiency.

[0007] Optionally, the defoaming assembly includes an impeller and a mounting shell covering the outside of the impeller. The extraction pipe and the liquid delivery pipe are both fixedly connected to and communicate with the mounting shell. A driving component for driving the impeller to rotate is installed on the upper side of the impeller.

[0008] By adopting the above technical solution, the driving component drives the impeller to rotate. At this time, a negative pressure is formed in the middle of the side of the impeller near the extraction pipe, thereby sucking the foam in the circulation box into the mounting shell through the extraction pipe. Under the centrifugal force generated by the rotation of the impeller, the foam is broken. The alkaline solution formed after the foam breaks moves into the mounting shell and is then sent back to the circulation box through the liquid delivery pipe to mix with the alkaline solution in the circulation box, thereby reducing the adverse effects on the degreasing efficiency.

[0009] Optionally, the drive unit includes a first motor mounted on the upper side outside the circulation tank and driving the impeller to rotate.

[0010] By adopting the above technical solution, the first motor drives the impeller to rotate, which facilitates the driving extraction pipe to suck the foam in the circulation box into the center of the impeller and break it under the action of centrifugal force generated by the impeller. The alkaline solution formed after breaking is transported through the liquid delivery pipe to mix with the alkaline solution in the circulation box, thereby reducing the adverse effect of foam on degreasing efficiency and improving the utilization rate of alkaline solution.

[0011] Optionally, the circulation tank is equipped with a float for monitoring the alkali solution level, an extension tube is sleeved and slidably connected to the lower side of the extraction tube, and a sliding component is provided on the circulation tank to drive the extension tube to slide and always be inserted into the foam.

[0012] By adopting the above technical solution, the alkali liquid level in the circulation tank is monitored by a float. When the alkali liquid level changes, the sliding component drives the extension tube to slide on the extraction tube, so that the lower end of the extension tube is always in the foam, reducing the possibility that the extraction tube is difficult to extract the foam, and further reducing the adverse effect of foam on degreasing efficiency.

[0013] Optionally, the sliding member includes sliding rods fixedly connected to both sides of the extension tube. The ends of the sliding rods that are far apart from each other are bent upward and pass through the circulation box and are slidably connected to the circulation box. The ends of the sliding rods that pass through the circulation box are all fixedly connected to the same sliding ring. The circulation box is provided with a hydraulic cylinder that drives the sliding ring to move.

[0014] By adopting the above technical solution, the hydraulic cylinder drives the sliding ring to move, thereby moving the sliding rod and the extension tube. This makes it easier to adjust the position of the lower end of the extension tube according to the movement of the float, ensuring that the lower end of the extension tube is always in the foam and does not come into contact with the alkali solution. This reduces the possibility that the extraction tube may have difficulty extracting the foam, and further reduces the adverse effect of foam on degreasing efficiency.

[0015] Optionally, the circulation box is provided with a foam-removing component that drives the foam in the circulation box to move closer to the extraction tube.

[0016] By adopting the above technical solution, the foam on the side away from the extraction tube is moved closer to the extraction tube by the foam-removing component, which facilitates the defoaming of the foam generated in the circulation tank, reduces the adverse effect of foam on degreasing efficiency when the alkali is reused, and improves the utilization rate of alkali.

[0017] Optionally, the foaming assembly includes a foaming plate located in the circulation box and moving in a direction close to or away from the extraction tube, the lower side of the foaming plate contacting the foam, and the circulation box having a moving member for driving the foaming plate to move.

[0018] By adopting the above technical solution, the moving component drives the bubble-dispensing plate to push the foam away from the extraction tube towards the extraction tube. When there is a lot of foam at the extraction tube, the bubble-dispensing plate stops moving. At this time, the bubble-dispensing plate limits the foam, reducing the possibility of the foam moving away from the extraction tube again. When the foam at the extraction tube decreases, the bubble-dispensing plate is driven again to push the foam to move, which further facilitates the defoaming of the foam in the circulation box, reduces the adverse effect of foam on the degreasing efficiency when the alkali is reused, and improves the utilization rate of alkali.

[0019] Optionally, the movable component includes movable rods fixedly connected to both ends on the upper side of the bubble-dispensing plate, the upper end of the movable rod passing through the upper side of the circulation box and slidably connected to the circulation box, and a lead screw rotatably connected to the circulation box passing through one end of the movable rod and threadedly connected to the movable rod.

[0020] By adopting the above technical solution, the lead screw rotates and drives the corresponding moving rod to move the bubble-dissolving plate and another moving rod in the direction of approaching or moving away from the extraction tube. This makes it easier for the bubble-dissolving plate to push the foam towards the extraction tube or reset it, which facilitates the defoaming of the foam in the circulation box, reduces the adverse effect of foam on the degreasing efficiency when the alkali is reused, and improves the utilization rate of alkali.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. The foam in the circulation tank is moved to the defoaming component through the extraction pipe. The alkaline solution formed after defoaming by the defoaming component is transported to the circulation tank through the delivery pipe. The position of the lower end of the delivery pipe makes it difficult for the defoamed alkaline solution to generate foam again during the transportation process, thus reducing the adverse effect on the degreasing efficiency. 2. The first motor drives the impeller to rotate, which facilitates the driving of the extraction pipe to suck the foam in the circulation box into the center of the impeller and break it under the action of centrifugal force generated by the impeller. The alkaline solution formed after breaking is transported through the liquid delivery pipe to mix with the alkaline solution in the circulation box, thereby reducing the adverse effect of foam on degreasing efficiency and improving the utilization rate of alkaline solution. 3. The hydraulic cylinder drives the sliding ring to move, which in turn moves the sliding rod and the extension tube. This allows for easy adjustment of the position of the lower end of the extension tube according to the movement of the float, ensuring that the lower end of the extension tube is always in the foam and does not come into contact with the alkali solution. This reduces the possibility that the extraction tube may have difficulty extracting the foam and further reduces the adverse effects of the foam on the degreasing efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the mechanical defoaming device in the galvanizing cleaning section of Embodiment 1 of this application.

[0023] Figure 2 This is a structural schematic diagram illustrating the positional relationship between the spiral nozzle and the circulation box in Embodiment 1 of this application.

[0024] Figure 3 This is a structural diagram illustrating the positional relationship between the defoaming component and the circulation tank in Embodiment 1 of this application.

[0025] Figure 4 This is a structural schematic diagram illustrating the positional relationship between the sliding member and the circulation box in Embodiment 2 of this application.

[0026] Figure 5 This is a structural schematic diagram illustrating the positional relationship between the extension tube and the sliding component in Embodiment 2 of this application.

[0027] Figure 6 This is a structural schematic diagram illustrating the positional relationship between the slider and the bubble-pouring assembly in Embodiment 2 of this application.

[0028] Explanation of reference numerals in the attached drawings: 1. Circulation tank; 11. Inlet pipe; 12. Overflow pipe; 13. Main pipe; 131. Control pump; 14. Moving hole; 2. Spiral nozzle; 21. First branch pipe; 22. Second branch pipe; 3. Extraction pipe; 31. Delivery pipe; 4. Defoaming assembly; 41. Impeller; 411. Drive shaft; 42. Mounting housing; 43. Drive component; 431. Mounting plate; 432. First motor; 5. Float; 51. Steel rope; 52. Fixed pulley; 53. Counterweight; 54. Limiting plate; 6. Extension pipe; 61. Sliding component; 611. Sliding rod; 612. Sliding ring; 613. Hydraulic cylinder; 7. Foaming assembly; 71. Foaming plate; 72. Moving component; 721. Moving rod; 722. Moving block; 723. Lead screw; 724. Second motor. Detailed Implementation

[0029] The present application will be further described in detail below with reference to the accompanying drawings.

[0030] This application discloses a mechanical defoaming device for a galvanizing cleaning section. Example 1

[0031] Reference Figure 1 and Figure 2An inlet pipe 11 is installed at one end of the upper side of the circulation tank 1, and the inlet pipe 11 is located on one side of the upper side of the circulation tank 1. An overflow pipe 12 is installed on the upper side of the circulation tank 1 near the end of the inlet pipe 11, with its end bent downwards and fixedly connected to and communicating with the circulation tank 1. The overflow pipe 12 is located on the other side of the inlet pipe 11 near the other side of the circulation tank 1. A main pipe 13 is installed on the lower side of the circulation tank 1 away from the overflow pipe 12, communicating with the interior of the circulation tank 1. The end of the main pipe 13 away from the circulation tank 1 is bent upwards to a vertical position, and a control pump 131 is installed on the main pipe 13.

[0032] A mechanical defoaming device for a galvanizing cleaning section includes a spiral nozzle 2 disposed inside a circulation tank 1 and located in the middle of the upper side of the circulation tank 1. A first branch pipe 21, which communicates with the inside of the main pipe 13, is installed on the upper end of the main pipe 13 and on the side close to the circulation tank 1. The first branch pipe 21 faces the spiral nozzle 2 and the end of the first branch pipe 21 away from the main pipe 13 is bent downward and inserted into the circulation tank 1. The bent end of the first branch pipe 21 is fixedly connected to and communicates with the spiral nozzle 2.

[0033] The upper side of the inside of the circulation box 1 is provided with a spiral nozzle 2 near the overflow pipe 12. The side of the main pipe 13 near the circulation box 1 is equipped with a second branch pipe 22 facing the overflow pipe 12. The end of the second branch pipe 22 away from the main pipe 13 is bent downward and inserted into the circulation box 1 and fixedly connected to the spiral nozzle 2 near the overflow pipe 12.

[0034] Reference Figure 2 and Figure 3 Inside the circulation tank 1, near the overflow pipe 12, there is a vertical extraction pipe 3 located in the middle of the length direction of the circulation tank 1. The lower side of the extraction pipe 3 is inserted into the foam inside the circulation tank 1. On both sides of the extraction pipe 3, there are horizontal liquid delivery pipes 31 symmetrically arranged and facing away from the extraction pipe 3. The liquid delivery pipes 31 are all bent downward on the opposite side and inserted into the alkaline solution in the circulation tank 1. The upper end of the extraction pipe 3 is provided with a defoaming component 4 that is connected to the liquid delivery pipe 31.

[0035] The control pump 131 draws out the alkaline solution from the circulation tank 1 and delivers it through the main pipe 13. The first branch pipe 21 and the second branch pipe 22 deliver part of the alkaline solution to the spiral nozzle 2 for spraying, thereby defoaming the foam inside the circulation tank 1 and near the overflow pipe 12.

[0036] Meanwhile, the foam in the circulation tank 1 is moved to the defoaming component 4 through the extraction pipe 3. The alkaline solution formed after defoaming by the defoaming component 4 is transported to the circulation tank 1 through the liquid delivery pipe 31. The position of the lower end of the liquid delivery pipe 31 makes it difficult for the defoamed alkaline solution to generate foam again during the transportation process, thus reducing the adverse effect on the degreasing efficiency.

[0037] Reference Figure 3The defoaming component 4 includes a horizontal impeller 41 located above the extraction tube 3. A mounting shell 42 covers the outer side of the impeller 41. The upper end of the extraction tube 3 is installed in and fixedly connected to the mounting shell 42, at which point the extraction tube 3 communicates with the lower side of the impeller 41. A vertical drive shaft 411 is fixedly connected to the shaft center of the impeller 41. The upper end of the drive shaft 411 passes through the circulation box 1. A drive component 43 for driving the drive shaft 411 to rotate is provided on the upper side of the outside of the circulation box 1. The drive component 43 includes a mounting plate 431 that is sleeved and rotatably connected to one end of the drive shaft 411 passing through the circulation box 1. The mounting plate 431 overlaps the upper side of the circulation box 1, and a first motor 432 fixedly connected to the upper side of the mounting plate 431 and installed at the end of the drive shaft 411.

[0038] The first motor 432 drives the impeller 41 to rotate via the drive shaft 411. At this time, a negative pressure is formed in the middle of the impeller 41 near the extraction pipe 3, thereby drawing the foam in the circulation tank 1 into the mounting shell 42 through the extraction pipe 3. The foam is broken by the centrifugal force generated by the rotation of the impeller 41. The alkaline solution formed after the foam breaks moves into the mounting shell 42 and is then sent back to the circulation tank 1 through the liquid delivery pipe 31 to mix with the alkaline solution in the circulation tank 1, thus completing the defoaming process.

[0039] The implementation principle of Example 1 is as follows: When the impeller 41 rotates, a negative pressure is formed in the middle of the lower side of the impeller 41, thereby drawing the foam in the circulation tank 1 into the mounting shell 42 through the extraction pipe 3. Under the centrifugal force generated by the rotation of the impeller 41, the foam is broken. The alkaline solution formed after the foam breaks moves to the mounting shell 42 and is then sent back to the circulation tank 1 through the liquid delivery pipe 31 to mix with the alkaline solution in the circulation tank 1, thus completing the defoaming. Example 2

[0040] Reference Figure 4 and Figure 5 The difference between this embodiment and Embodiment 1 is that a float 5 is provided inside the circulation tank 1 on the side near the extraction pipe 3 and away from the overflow pipe 12, floating on the surface of the alkaline solution. The foam in the circulation tank 1 makes it difficult for the float 5 to float. A steel cable 51 is fixedly connected to the upper side of the float 5, with one end passing through the circulation tank 1 and slidably connected to the circulation tank 1. A fixed pulley 52 is rotatably connected to the upper side of the circulation tank 1 and the end near the steel cable 51. The end of the steel cable 51 away from the float 5 passes over the upper side of the fixed pulley 52 and is fixedly connected to a counterweight 53 located on the side of the circulation tank 1 near the main pipe 13. A limiting plate 54 is installed on the side of the circulation tank 1 near the main pipe 13, sleeved on the end of the steel cable 51 near the counterweight 53.

[0041] A vertical extension tube 6 is sleeved and slidably connected to the lower end of the extraction tube 3. The circulation tank 1 is equipped with a sliding component 61 that drives the extension tube 6 to slide, ensuring that the lower end of the extension tube 6 is always inserted into the foam and does not contact the alkaline solution. (Refer to...) Figure 5 and Figure 6The sliding member 61 includes vertical sliding rods 611 located on both sides of the extension tube 6. The line connecting the sliding rods 611 is parallel to the width direction of the circulation box 1, and the lower ends of the sliding rods 611 are all bent towards each other and fixedly connected to the upper side of the extension tube 6.

[0042] The upper end of the sliding rod 611 passes through the circulation box 1 and is slidably connected to the circulation box 1. The upper end of the sliding rod 611 is fixedly connected to the same horizontal sliding ring 612. The sliding ring 612 is mounted on the side near the overflow pipe 12 with a vertical hydraulic cylinder 613 fixedly connected to the upper side of the circulation box 1.

[0043] The float 5 monitors the alkali liquid level in the circulation tank 1. When the alkali liquid level changes, the hydraulic cylinder 613 drives the sliding ring 612 to move, which in turn drives the sliding rod 611 and the extension tube 6 to move, so that the lower end of the extension tube 6 is always in the foam, reducing the possibility that the extraction tube 3 will have difficulty extracting the foam.

[0044] Reference Figure 4 , Figure 5 and Figure 6 The circulation box 1 is provided with a foam-pulling assembly 7 that pushes the foam away from the extraction tube 3 toward the direction of the extraction tube 3. The foam-pulling assembly 7 includes a vertical foam-pulling plate 71 located inside the circulation box 1 and arranged along the length of the circulation box 1. The foam-pulling plate 71 is located on the side of the circulation box 1 away from the extraction tube 3 and its lower side is in contact with the foam. The circulation box 1 is provided with a moving member 72 that drives the foam-pulling plate 71 to move toward the direction of the extraction tube 3.

[0045] The movable component 72 includes vertical movable rods 721 fixedly connected to both ends of the upper side of the bubble decanter 71. The upper side of the circulation box 1 has movable holes 14 corresponding to the movable rods 721 and parallel to the width direction of the circulation box 1. The upper ends of the movable rods 721 pass through the corresponding movable holes 14 and are slidably connected to the circulation box 1. Movable blocks 722, with a length greater than the width of the movable holes 14, are fixedly connected to the upper ends of the movable rods 721. The movable blocks 722 overlap the circulation box 1 and move with the corresponding movable rods 721. A horizontal lead screw 723, arranged along the width direction of the circulation box 1, is threaded through and connected to the movable block 722 near the overflow pipe 12. The lead screw 723 is rotatably connected to the upper side of the circulation box 1, and a second motor 724 fixedly connected to the circulation box 1 is installed at one end of the lead screw 723.

[0046] The second motor 724 drives the lead screw 723 to rotate, thereby driving the corresponding moving rod 721 to move the bubble-removing plate 71 and another moving rod 721 in the direction of approaching or moving away from the extraction tube 3. When there is a lot of foam at the extraction tube 3, the bubble-removing plate 71 stops moving. At this time, the bubble-removing plate 71 limits the foam, reducing the possibility of the foam moving away from the extraction tube 3 again. When the foam at the extraction tube 3 decreases, the bubble-removing plate 71 is driven again to push the foam to move, which further facilitates the defoaming of the foam in the circulation box 1 and improves the utilization rate of alkali solution.

[0047] The implementation principle of Example 2 is as follows: the float 5 monitors the alkali liquid level in the circulation tank 1. When the alkali liquid level changes, the hydraulic cylinder 613 drives the sliding ring 612 to move, thereby moving the sliding rod 611 and the extension tube 6, so that the lower end of the extension tube 6 is always in the foam, reducing the possibility that the extraction tube 3 has difficulty extracting the foam.

[0048] 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 mechanical defoaming device for a galvanizing cleaning section, characterized in that: Includes an extraction pipe (3) installed in a circulation tank (1) to extract foam, and a delivery pipe (31) provided in the circulation tank (1) to send the defoamed alkaline solution into the circulation tank (1). The lower end of the delivery pipe (31) is inserted into the alkaline solution in the circulation tank (1). A defoaming assembly (4) connecting the extraction pipe (3) and the delivery pipe (31) is installed between the two.

2. The mechanical defoaming device for a galvanizing cleaning section according to claim 1, characterized in that: The defoaming component (4) includes an impeller (41) and a mounting shell (42) covering the outside of the impeller (41). The extraction pipe (3) and the liquid delivery pipe (31) are fixedly connected and communicate with the mounting shell (42). A driving component (43) for driving the impeller (41) to rotate is installed on the upper side of the impeller (41).

3. The mechanical defoaming device for a galvanizing cleaning section according to claim 2, characterized in that: The drive unit (43) includes a first motor (432) mounted on the upper side outside the circulation box (1) and driving the impeller (41) to rotate.

4. The mechanical defoaming device for a galvanizing cleaning section according to claim 3, characterized in that: The circulation tank (1) is equipped with a float (5) for monitoring the alkali liquid level. An extension tube (6) is sleeved and slidably connected to the lower side of the extraction tube (3). The circulation tank (1) is equipped with a sliding component (61) that drives the extension tube (6) to slide and is always inserted into the foam.

5. The mechanical defoaming device for a galvanizing cleaning section according to claim 4, characterized in that: The sliding member (61) includes sliding rods (611) fixedly connected to both sides of the extension tube (6). The ends of the sliding rods (611) that are far apart from each other are bent upward and pass through the circulation box (1) and are slidably connected to the circulation box (1). The same sliding ring (612) is fixedly connected to the end of the sliding rods (611) that passes through the circulation box (1). The circulation box (1) is provided with a hydraulic cylinder (613) that drives the sliding ring (612) to move.

6. The mechanical defoaming device for a galvanizing cleaning section according to claim 5, characterized in that: The circulation box (1) is provided with a foam-removing component (7) that drives the foam in the circulation box (1) to move toward the extraction tube (3).

7. The mechanical defoaming device for a galvanizing cleaning section according to claim 6, characterized in that: The foaming assembly (7) includes a foaming plate (71) located in the circulation box (1) and moving in a direction close to or away from the extraction tube (3). The lower side of the foaming plate (71) is in contact with the foam. The circulation box (1) is provided with a moving part (72) that drives the foaming plate (71) to move.

8. The mechanical defoaming device for a galvanizing cleaning section according to claim 7, characterized in that: The movable component (72) includes movable rods (721) fixedly connected to both ends of the upper side of the bubble-dispensing plate (71). The upper end of the movable rod (721) passes through the upper side of the circulation box (1) and is slidably connected to the circulation box (1). A lead screw (723) is rotatably connected to the circulation box (1) passing through the end of one of the movable rods (721) and threadedly connected to the movable rod (721).

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