Spraying device for surface treatment liquid after profile steel plating

Abstract

The utility model relates to a surface treatment liquid spraying device for section steel after plating, and belongs to the technical field of post-plating treatment of section steel hot-dip galvanizing in the metallurgical industry. According to the technical scheme, the device comprises an inlet purging system, a spraying system and an outlet purging system, wherein the inlet purging system, the spraying system and the outlet purging system are sequentially arranged in the conveying direction of workpieces on a conveying roller way (18); the gas tank I (9) is connected with an inlet purging pipe (1) through an angle valve I (2) and an inlet pipeline (17); the two groups of spraying pipelines (15) are arranged in sequence, each group of spraying pipelines (15) is connected with the spraying pipe (4), and the liquid collecting box (7) is arranged below the liquid collecting funnel (6); the gas tank II (10) is connected with the outlet purging pipe (5) through an angle valve II (8) and an outlet pipeline (16); and a regulating valve (11) is arranged on the outlet pipeline (16). The device has the beneficial effects that surplus treatment liquid on the surface of the profile steel can be blown off and can flow back to the liquid collecting box in time.

Description

Technical Field

[0001] This utility model relates to a spraying device for surface treatment liquid of steel profiles after plating, belonging to the technical field of post-plating treatment of hot-dip galvanized steel profiles in the metallurgical industry. Background Technology

[0002] After hot-dip galvanizing, the steel profiles are first cooled by immersion in a water-cooling pool, then sprayed or dipped with a treatment solution, and finally dried to prevent white rust from appearing on the surface of the galvanized steel profiles.

[0003] Currently, there are two treatment modes for post-plating surface treatment liquid spraying devices for steel profiles both domestically and internationally: immersion and spraying. The spraying type is simply a pump with spray pipes at the top and bottom spraying the steel. The liquid flows back to the collection tank. Due to the residual water on the surface of the steel profile after the previous water cooling, the volume of the collected post-treatment liquid increases, the collection tank expands, and the concentration decreases. After long-term circulation, the post-treatment liquid deteriorates and becomes unusable. If it is used but dried, obvious spots appear, or white rust develops on the surface after short-term storage. Utility Model Content

[0004] The purpose of this invention is to provide a surface treatment liquid spraying device for steel profiles after plating, which can blow off excess treatment liquid from the surface of the steel profiles and allow it to flow back to the collection tank in a timely manner, thus solving the problems existing in the background art.

[0005] The technical solution of this utility model is:

[0006] A surface treatment liquid spraying device for steel profiles after plating includes an inlet purging system, a spraying system and an outlet purging system, which are arranged sequentially according to the conveying direction of the workpiece on the conveying roller conveyor.

[0007] The inlet purging system includes an inlet purging pipe, an angle valve, an air tank, and an inlet pipeline. The air tank is connected to the inlet purging pipe through the angle valve and the inlet pipeline.

[0008] The spraying system includes a spray pump, spray pipes, spray pipelines, a liquid collection funnel, and a liquid collection tank. Two sets of spray pipelines are arranged in sequence according to the conveying direction of the workpiece. Each set of spray pipelines is connected to a spray pipe. The liquid collection tank is located below the liquid collection funnel.

[0009] The outlet purging system includes an outlet purging pipe, angle valve two, gas tank two, regulating valve and outlet pipeline. Gas tank two is connected to the outlet purging pipe through angle valve two and outlet pipeline, and regulating valve is provided on the outlet pipeline.

[0010] Furthermore, the inlet purge pipe, spray pipe, and outlet purge pipe are respectively positioned above and below the workpiece.

[0011] Furthermore, the inlet purge pipe, spray pipe, and outlet purge pipe are each equipped with a nozzle facing the workpiece.

[0012] Furthermore, the inlet purge pipe is located outside the liquid collecting funnel, while the spray pipe and outlet purge pipe are located inside the liquid collecting funnel.

[0013] The beneficial effects of this utility model are as follows: An inlet purging system is added before the spraying system, and ordinary compressed air is used as the purging medium to intercept the excess water after the water cooling process and keep it outside the collection system, thus preventing pollution of the spraying circulation system; An outlet purging system is added to blow off the excess treatment liquid on the surface of the steel profile, reducing the slow backflow caused by uneven steel surface roughness and preventing it from being carried to the subsequent drying process, and ensuring that the liquid flows back to the collection tank in a timely manner, thereby reducing secondary pollution after the liquid is collected again. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the present invention;

[0015] In the diagram: 1. Inlet purge pipe; 2. Angle valve 1; 3. Spray pump; 4. Spray pipe; 5. Outlet purge pipe; 6. Liquid collection funnel; 7. Liquid collection tank; 8. Angle valve 2; 9. Air tank 1; 10. Air tank 2; 11. Regulating valve; 12. Solenoid valve; 13. Detection switch; 14. Outlet detection switch; 15. Spray pipeline; 16. Outlet pipeline; 17. Inlet pipeline; 18. Workpiece conveyor roller; 19. Control air pipeline. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and examples.

[0017] See attached document Figure 1 A surface treatment liquid spraying device for steel profiles after plating includes an inlet purging system, a spraying system and an outlet purging system, which are arranged sequentially according to the conveying direction of the workpiece on the conveying roller 18.

[0018] The inlet purging system includes an inlet purging pipe 1, an angle valve 2, an air tank 9, and an inlet pipe 17. The air tank 9 is connected to the inlet purging pipe 1 through the angle valve 2 and the inlet pipe 17.

[0019] The spraying system includes a spray pump 3, a spray pipe 4, a spray pipeline 15, a liquid collection funnel 6, and a liquid collection tank 7. Two sets of spray pipelines 15 are arranged in sequence according to the conveying direction of the workpiece. Each set of spray pipelines 15 is connected to a spray pipe 4. The liquid collection tank 7 is located below the liquid collection funnel 6.

[0020] The outlet purging system includes an outlet purging pipe 5, an angle valve 2 8, a gas tank 2 10, a regulating valve 11, and an outlet pipeline 16. The gas tank 2 10 is connected to the outlet purging pipe 5 through the angle valve 2 8 and the outlet pipeline 16. The outlet pipeline 16 is equipped with a regulating valve 11.

[0021] The angle valve 12 and angle valve 28 are pneumatic control valves. They control the opening and closing of the control air pipeline 19 by responding to the signals of the corresponding detection switch 13 and outlet detection switch 14 through the solenoid valve 12, thereby controlling the on / off state of the two valves.

[0022] In this example, refer to the appendix. Figure 1 Based on the equipment of the unit, this section is divided into three parts: the inlet purging system, the spray system, and the outlet purging system.

[0023] Inlet purging system: includes inlet purging pipe 1, angle valve 2, air tank 9, detection switch 13 and inlet pipeline 17. Air tank 9 serves as a compressed air storage tank, connected from the workshop compressed air pipeline via a pneumatic triplet to ensure the system's air source is dry and the air pressure is stable. When the detection switch 13 detects the presence of steel, angle valve 2 opens the inlet pipeline 17 and the inlet purging pipe 1 purges the workpiece. The inlet purging pipe 1 is positioned above and below the workpiece and is equipped with nozzles facing the workpiece.

[0024] Spraying system: includes spray pump 3, spray pipe 4, spray pipeline 15, liquid collection funnel 6 and liquid collection tank 7. Spray pipe 4 is set above and below the workpiece and is equipped with nozzles facing the workpiece.

[0025] The outlet purging system includes angle valve 2 8, air tank 2 10, regulating valve 11, outlet detection switch 14, and outlet pipeline 16. Air tank 2 10 serves as a compressed air storage tank, connected from the workshop compressed air pipeline via a pneumatic triplet to ensure the system's air source is dry and the air pressure is stable. When the outlet detection switch 14 detects the presence of steel, angle valve 2 8 opens the outlet pipeline 16 and purges the outlet purging pipe 5. The outlet pipeline 16 is equipped with regulating valve 11 to adjust the purging pressure. The outlet purging pipe 5 is positioned above and below the workpiece and is equipped with nozzles facing the workpiece.

[0026] Working principle of this utility model:

[0027] Inlet purging: After the detection switch 13 detects the presence of structural steel, the system sends a signal to the solenoid valve 12 to control the air supply in the air pipeline 19, the angle valve 12 opens, the inlet pipeline 17 is connected, and the inlet purging pipe 1 starts purging. When the detection switch 13 detects the absence of structural steel, the angle valve 12 closes, and the inlet pipeline 17 is disconnected.

[0028] Spraying: Spray pump 3 starts after a delay when detection switch 13 detects the presence of structural steel. Spray pipeline 15 supplies liquid, and two sets of spray pipes 4 spray the treatment liquid. The pump stops after a given time, and all the liquid flows from collection hopper 6 into collection tank 7, waiting for the next start.

[0029] Outlet purging: After detection switch 14 detects the presence of structural steel, the system sends a signal to solenoid valve 12, controlling air supply to air line 19, opening angle valve 2 8, and allowing air supply to outlet line 16. Outlet purging pipe 5 then begins purging. When detection switch 14 detects the absence of structural steel, angle valve 2 8 closes, and outlet line 16 is disconnected. The pipeline is equipped with regulating valve 11 to adjust the purging pressure as needed. Liquid blown off by the outlet purging system is also collected in collection tank 7 via collection funnel 6, reducing the loss of treated liquid carried over to the outside.

Claims

1. A spraying device for surface treatment liquid on steel profiles after plating, characterized in that: It includes an inlet purging system, a spray system and an outlet purging system, which are arranged sequentially according to the conveying direction of the workpiece on the conveying roller (18); The inlet purging system includes an inlet purging pipe (1), an angle valve (2), an air tank (9), and an inlet pipeline (17). The air tank (9) is connected to the inlet purging pipe (1) through the angle valve (2) and the inlet pipeline (17). The spraying system includes a spray pump (3), a spray pipe (4), a spray pipeline (15), a liquid collection funnel (6), and a liquid collection tank (7). The two sets of spray pipelines (15) are arranged in the order of the conveying direction of the workpiece. Each set of spray pipelines (15) is connected to a spray pipe (4). The liquid collection tank (7) is located below the liquid collection funnel (6). The outlet purging system includes an outlet purging pipe (5), an angle valve (8), an air tank (10), a regulating valve (11), and an outlet pipeline (16). The air tank (10) is connected to the outlet purging pipe (5) through the angle valve (8) and the outlet pipeline (16). The outlet pipeline (16) is equipped with a regulating valve (11).

2. The steel profile surface treatment liquid spraying device according to claim 1, characterized in that: The inlet purge pipe (1), spray pipe (4) and outlet purge pipe (5) are respectively located above and below the workpiece.

3. The steel profile surface treatment liquid spraying device according to claim 2, characterized in that: The inlet purge pipe (1), spray pipe (4) and outlet purge pipe (5) are each equipped with a nozzle facing the workpiece.

4. The steel profile surface treatment liquid spraying device according to claim 3, characterized in that: The inlet purge pipe (1) is located outside the liquid collection funnel (6), while the spray pipe (4) and the outlet purge pipe (5) are located inside the liquid collection funnel (6).

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