Automatic spraying equipment for chromium-free passivation solution of galvanized steel strip

Abstract

The utility model relates to galvanized strip steel passivation technical field discloses a kind of automatic spraying equipment of chromium-free passivation solution of galvanized strip steel, including bottom plate, the bottom plate top end both sides are fixedly connected with support frame, the support frame top end inner wall is rotatably connected with guide roller, the bottom plate top end left side is fixedly connected with spraying box, the spraying box left and right ends are provided with first slot, the spraying box front end inner wall both sides are fixedly connected with spray plate, the spray plate front end is fixedly connected with shunt pipe, the bottom plate top end is relative to the liquid supply component of spraying box bottom side and is provided with.This utility model, through connecting pipe import shunt pipe, then chromium-free passivation solution is sprayed on the surface of galvanized strip steel by spray head, and it is passivated to be handled, when galvanized strip steel moves in spraying box, extra chromium-free passivation solution drops in collecting groove, after filtering screen filtration, by liquid outlet pipe reflows into liquid storage tank, realizes the recycling of chromium-free passivation solution, reduces waste.

Description

Technical Field

[0001] This utility model relates to the field of passivation technology for galvanized steel strip, and in particular to an automatic spraying equipment for chromium-free passivation liquid for galvanized steel strip. Background Technology

[0002] Galvanized steel strip is made by uniformly coating a layer of zinc onto the surface of cold-rolled or hot-rolled steel strip through electroplating or hot-dip galvanizing processes, forming a protective layer that effectively prevents the steel from being oxidized and corroded. Galvanized steel strip is a type of steel that has undergone a galvanizing process, with a layer of zinc covering its surface to improve its corrosion resistance and extend its service life.

[0003] A search revealed that the galvanized steel strip spraying and drying equipment (publication number CN222152591U) includes a base with multiple first guide rollers spaced apart on its surface. Multiple second and third guide rollers are respectively arranged on both sides of the first guide rollers. The second and third guide rollers are higher than the first guide rollers. The steel strip passes through the second, first, and third guide rollers, such that at least a portion of the steel strip is located above the second and third guide rollers, and at least a portion is located below the first guide roller. The steel strip between the second and first guide rollers forms a first inclined section, the steel strip between the first and third guide rollers forms a second inclined section, and the steel strip forms a horizontal section at the first guide roller. This design solves the problem in existing spraying devices, such as those described above, where the bending angle of the steel strip is too large when flipping it, easily causing deformation of steel strips with poor deformation capacity.

[0004] Based on the aforementioned patent, the strip steel is formed into a horizontal section at the first guide roller. During operation, the strip steel is pulled from the second guide roller to the third guide roller. In the first inclined section, its back side can be sprayed, and then it is dried and cured in the horizontal section. Before curing, the back side of the strip steel does not contact the guide roller to avoid wear caused by contact with the guide roller before it is dried. Then, the surface of the second inclined section of the strip steel is sprayed and dried in the second hot air drying box. Before curing, the surface of the strip steel does not contact the guide roller to avoid wear caused by contact with the guide roller before it is dried. The galvanized strip steel spraying and drying equipment provided by this utility model can effectively spray the front and back sides of the strip steel and dry it in time. However, the above solution sprays the galvanized strip steel with a spray head, which will spray out excess chromium-free passivation liquid. This chromium-free passivation liquid is not easy to recover and is easy to cause waste.

[0005] In response to this technical problem, this application proposes an automatic spraying equipment for chromium-free passivation liquid on galvanized steel strip. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing an automatic spraying device for chromium-free passivation solution on galvanized steel strip. The solution is introduced into a distribution pipe via a connecting pipe, and then sprayed onto the surface of the galvanized steel strip through a spray head for passivation treatment. As the galvanized steel strip moves within the spraying box, excess chromium-free passivation solution drips into a collection tank, is filtered through a filter screen, and then flows back into the storage tank through an outlet pipe, thus achieving the recycling of the chromium-free passivation solution and reducing waste.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] An automatic spraying device for chromium-free passivation liquid of galvanized strip steel includes a base plate, with support frames fixedly connected to both sides of the top of the base plate. Guide rollers are rotatably connected to the inner wall of the top of the support frames. A spraying box is fixedly connected to the left side of the top of the base plate. First slots are opened at both ends of the left and right sides of the spraying box. Spraying plates are fixedly connected to both sides of the inner wall of the front end of the spraying box. A diversion pipe is fixedly connected to the front end of the spraying plates. A liquid supply component is provided at the top of the base plate relative to the bottom side of the spraying box. A recovery component is provided on the inner wall of the bottom end of the spraying box. A drying box is fixedly connected to the right side of the top of the base plate. Second slots are opened at both ends of the left and right sides of the drying box. Air inlet frames are fixedly connected to the inner walls of the front and rear ends of the drying box. A drying component is provided on the inner wall of the front air inlet frame.

[0009] Furthermore, multiple spray heads are provided at opposite ends of the spray plates on both sides.

[0010] Furthermore, the liquid supply assembly includes a liquid storage tank fixedly connected to the top of the base plate relative to the bottom side of the spray box. A pump is connected to the front end of the liquid storage tank via a pipe. A connecting pipe is fixedly connected to the front end of the pump. The other end of the connecting pipe is fixedly connected to the front end of the diversion pipe.

[0011] Furthermore, a replenishment pipe is fixedly connected to the right rear end of the liquid storage tank.

[0012] Furthermore, the recycling component includes a collection trough located on the inner wall of the bottom end of the spray box, a filter frame slidably connected to the inner wall of the collection trough, a filter screen fixedly connected to the inner wall of the filter frame, and a liquid outlet pipe fixedly connected to the inner wall of the bottom end of the spray box.

[0013] Furthermore, the bottom end of the liquid outlet pipe is fixedly connected to the top of the liquid storage tank, and the inner wall of the spraying box and the liquid storage tank are connected through the liquid outlet pipe.

[0014] Furthermore, the drying assembly includes a dustproof net fixedly connected to the inner wall of the front air inlet frame, an electric heating wire fixedly connected to the middle of the inner wall of the air inlet frame, and an air inlet fan fixedly connected to the rear side of the inner wall of the air inlet frame.

[0015] Furthermore, an exhaust fan is fixedly connected to the inner wall of the rear air inlet frame, and an air duct is formed between the two air inlet frames.

[0016] This utility model has the following beneficial effects:

[0017] 1. In this utility model, the solution is introduced into the distribution pipe through the connecting pipe, and then the chromium-free passivation solution is sprayed onto the surface of the galvanized steel strip through the spray head to passivate it. When the galvanized steel strip moves in the spray box, the excess chromium-free passivation solution drips into the collection tank, is filtered by the filter screen, and then flows back into the storage tank through the outlet pipe, realizing the recycling of the chromium-free passivation solution and reducing waste.

[0018] 2. In this utility model, hot air is blown onto the surface of the galvanized steel strip by the inlet fan to dry the surface. The outlet fan draws the air out of the drying chamber to form an air duct, which accelerates the flow of hot air and improves the drying efficiency. In addition, the dustproof net effectively prevents dust and other impurities from entering the drying chamber, ensuring the cleanliness of the drying air and further improving the drying quality of the galvanized steel strip. Attached Figure Description

[0019] Figure 1 This is a perspective view of an automatic spraying device for chromium-free passivation liquid of galvanized strip steel proposed in this utility model;

[0020] Figure 2 This is a schematic diagram of the spray box in an automatic spraying equipment for chromium-free passivation liquid of galvanized strip steel proposed in this utility model;

[0021] Figure 3 This is a schematic diagram of the spray plate structure in an automatic spraying device for chromium-free passivation liquid of galvanized strip steel proposed in this utility model;

[0022] Figure 4 This is a schematic diagram of the drying chamber in an automatic spraying equipment for chromium-free passivation liquid of galvanized steel strip proposed in this utility model.

[0023] Legend:

[0024] 1. Base plate; 2. Support frame; 3. Guide roller; 4. Spray box; 5. First slot; 6. Spray plate; 7. Diverter pipe; 8. Filter frame; 9. Filter screen; 10. Liquid outlet pipe; 11. Collection tank; 12. Liquid storage tank; 13. Liquid replenishment pipe; 14. Pump; 15. Connecting pipe; 16. Drying box; 17. Second slot; 18. Air inlet frame; 19. Air inlet fan; 20. Heating wire; 21. Dustproof net; 22. Exit fan. Detailed Implementation

[0025] 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.

[0026] Reference Figures 1-3 This utility model provides an embodiment of an automatic spraying device for chromium-free passivation liquid on galvanized steel strip, comprising a base plate 1, support frames 2 fixedly connected to both sides of the top of the base plate 1, guide rollers 3 rotatably connected to the inner wall of the top of the support frames 2, a spraying box 4 fixedly connected to the left side of the top of the base plate 1, first slots 5 opened at both ends of the spraying box 4, spraying plates 6 fixedly connected to both sides of the inner wall of the front end of the spraying box 4, multiple spray heads arranged at opposite ends of the spraying plates 6, a diversion pipe 7 fixedly connected to the front end of the spraying plates 6, and a liquid storage tank fixedly connected to the top of the base plate 1 relative to the top of the spraying box 4 relative to the bottom side of the spraying box 4. 12. A pump 14 is connected to the front end of the storage tank 12 via a pipe. A connecting pipe 15 is fixedly connected to the front end of the pump 14. The other end of the connecting pipe 15 is fixedly connected to the front end of the diversion pipe 7. A replenishment pipe 13 is fixedly connected to the right side of the rear end of the storage tank 12. A collection groove 11 is opened on the inner wall of the bottom end of the spray box 4. A filter frame 8 is slidably connected to the inner wall of the collection groove 11. A filter screen 9 is fixedly connected to the inner wall of the filter frame 8. An outlet pipe 10 is fixedly connected to the inner wall of the bottom end of the spray box 4. The bottom end of the outlet pipe 10 is fixedly connected to the top end of the storage tank 12. The inner wall of the spray box 4 and the storage tank 12 are connected through the outlet pipe 10.

[0027] Specifically, the galvanized steel strip is passed through the first slot 5 and the second slot 17 and placed on the guide rollers 3 on both sides. The chromium-free passivation solution in the storage tank 12 is extracted by the pump 14 and introduced into the diversion pipe 7 through the connecting pipe 15. Subsequently, the chromium-free passivation solution is sprayed onto the surface of the galvanized steel strip through a spray head for passivation treatment. As the galvanized steel strip moves within the spray box 4, excess chromium-free passivation solution drips into the collection tank 11. After being filtered by the filter screen 9, it flows back into the storage tank 12 through the outlet pipe 10, achieving recycling of the chromium-free passivation solution and reducing waste. Furthermore, a handle is provided on the outside of the filter frame 8, allowing for easy replacement of the filter screen 9 by pulling the handle.

[0028] Reference Figure 1 and Figure 4A drying box 16 is fixedly connected to the top right of the base plate 1. The drying box 16 has second slots 17 at both ends. An air inlet frame 18 is fixedly connected to the inner wall of the front and rear ends of the drying box 16. A dustproof net 21 is fixedly connected to the inner wall of the front air inlet frame 18. An electric heating wire 20 is fixedly connected to the middle of the inner wall of the air inlet frame 18. An air inlet fan 19 is fixedly connected to the rear side of the inner wall of the air inlet frame 18. An air outlet fan 22 is fixedly connected to the inner wall of the rear air inlet frame 18. An air duct is formed between the two air inlet frames 18.

[0029] Specifically, inside the drying chamber 16, heating wire 20 heats the air, which is then blown onto the surface of the galvanized steel strip by the inlet fan 19 to perform the drying process. The dried air is then drawn out of the drying chamber 16 by the outlet fan 22, forming an effective airflow channel. This not only accelerates the circulation of hot air but also improves drying efficiency. Furthermore, the dust filter 21 effectively prevents dust and other impurities from entering the drying chamber 16, ensuring the purity of the air during the drying process and further improving the drying quality of the galvanized steel strip.

[0030] Working principle: In use, the galvanized steel strip is passed through the first slot 5 and the second slot 17 and placed on the guide rollers 3 on both sides. The chromium-free passivation liquid in the storage tank 12 is extracted by the pump 14 and introduced into the diversion pipe 7 through the connecting pipe 15. Then, the chromium-free passivation liquid is sprayed onto the surface of the galvanized steel strip through the spray head to passivate it. When the galvanized steel strip moves in the spray box 4, the excess chromium-free passivation liquid drips into the collection tank 11. After being filtered by the filter screen 9, it flows back into the storage tank 12 through the liquid outlet pipe 10, realizing the recycling of the chromium-free passivation liquid and reducing waste. In addition, a handle is provided on the outside of the filter frame 8, and the filter screen 9 can be easily replaced by pulling the handle.

[0031] Meanwhile, the heating wire 20 inside the drying chamber 16 heats the air, and the hot air is blown onto the surface of the galvanized steel strip by the inlet fan 19 to dry the surface. The outlet fan 22 draws the air out of the drying chamber 16 to form an air duct, which accelerates the flow of hot air and improves the drying efficiency. In addition, the dustproof net 21 effectively prevents dust and other impurities from entering the drying chamber 16, ensuring the cleanliness of the drying air and further improving the drying quality of the galvanized steel strip.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic spraying equipment for chromium-free passivation liquid of galvanized steel strip, characterized in that: The system includes a base plate (1), with support frames (2) fixedly connected to both sides of the top of the base plate (1). A guide roller (3) is rotatably connected to the inner wall of the top of the support frame (2). A spray box (4) is fixedly connected to the left side of the top of the base plate (1). A first slot (5) is provided at both ends of the left and right sides of the spray box (4). A spray plate (6) is fixedly connected to both sides of the inner wall of the front end of the spray box (4). A diversion pipe (7) is fixedly connected to the front end of the spray plate (6). A liquid supply component is provided at the top of the base plate (1) relative to the bottom side of the spray box (4). A recovery component is provided on the inner wall of the bottom end of the spray box (4). A drying box (16) is fixedly connected to the right side of the top of the base plate (1). A second slot (17) is provided at both ends of the left and right sides of the drying box (16). An air inlet frame (18) is fixedly connected to the inner wall of the front and rear ends of the drying box (16). A drying component is provided on the inner wall of the front air inlet frame (18).

2. The automatic spraying equipment for chromium-free passivation liquid of galvanized strip steel according to claim 1, characterized in that: Multiple spray heads are provided at opposite ends of the spray plates (6) on both sides.

3. The automatic spraying equipment for chromium-free passivation liquid of galvanized strip steel according to claim 1, characterized in that: The liquid supply assembly includes a liquid storage tank (12) fixedly connected to the top of the base plate (1) relative to the bottom side of the spray box (4). The front end of the liquid storage tank (12) is connected to a pump (14) through a pipe. The front end of the pump (14) is fixedly connected to a connecting pipe (15). The other end of the connecting pipe (15) is fixedly connected to the front end of the diversion pipe (7).

4. The automatic spraying equipment for chromium-free passivation liquid of galvanized strip steel according to claim 3, characterized in that: A replenishment pipe (13) is fixedly connected to the right rear end of the liquid storage tank (12).

5. The automatic spraying equipment for chromium-free passivation liquid of galvanized strip steel according to claim 1, characterized in that: The recycling component includes a collection trough (11) located on the inner wall of the bottom end of the spray box (4), a filter frame (8) is slidably connected to the inner wall of the collection trough (11), a filter screen (9) is fixedly connected to the inner wall of the filter frame (8), and an outlet pipe (10) is fixedly connected to the inner wall of the bottom end of the spray box (4).

6. The automatic spraying equipment for chromium-free passivation liquid of galvanized strip steel according to claim 5, characterized in that: The bottom end of the liquid outlet pipe (10) is fixedly connected to the top of the liquid storage tank (12), and the inner wall of the spray box (4) and the liquid storage tank (12) are connected through the liquid outlet pipe (10).

7. The automatic spraying equipment for chromium-free passivation liquid of galvanized strip steel according to claim 1, characterized in that: The drying assembly includes a dustproof net (21) fixedly connected to the inner wall of the front air inlet frame (18), an electric heating wire (20) fixedly connected to the middle of the inner wall of the air inlet frame (18), and an air inlet fan (19) fixedly connected to the rear side of the inner wall of the air inlet frame (18).

8. The automatic spraying equipment for chromium-free passivation liquid of galvanized strip steel according to claim 7, characterized in that: An exhaust fan (22) is fixedly connected to the inner wall of the rear air inlet frame (18), and an air duct is formed between the two sides of the air inlet frames (18).

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