A galvanized steel coil surface treatment apparatus

Abstract

The application relates to a galvanized steel coil surface treatment equipment and relates to the technical field of steel coil production, which comprises a galvanizing tank, a mounting frame fixedly connected to the upper side of the galvanizing tank, a reciprocating screw rod rotationally connected to the inner side of the mounting frame, and a moving frame threadedly connected to the outer side of the reciprocating screw rod. The meshing transmission of the worm and the worm wheel can drive the reciprocating screw rod to stably and slowly rotate, thereby driving the moving frame to make linear reciprocating motion along the guide rod, so that the fluorine rubber scraper at the bottom of the fixed frame horizontally pushes the surface oxides of the galvanizing tank at a low speed. The flexible contact and slow pushing mode significantly reduces the mechanical shearing force, avoids the breaking of large oxides into small particles from the source, and then forms a two-stage filtering structure by using a coarse filter plate and a fine filter plate, significantly improves the interception capacity of oxides with different particle sizes, reduces the risk of small particles not filtered back to the galvanizing tank with the galvanizing liquid, and improves the surface quality and production efficiency of the galvanized steel coil.

Description

Technical Field

[0001] This application relates to the field of steel coil production technology, and in particular to a surface treatment device for galvanized steel coils. Background Technology

[0002] Galvanized steel coils are widely used in industries such as construction, automobiles, and home appliances due to their excellent corrosion resistance. During the galvanizing process, the liquid zinc in the galvanizing bath, in prolonged contact with air, produces oxide slag. If not removed in time, the oxides will adhere to the surface of the steel coil, causing defects in the galvanized layer.

[0003] An existing patent (publication number: CN220099148U) discloses a galvanizing device for steel strip surfaces. It includes a galvanizing tank with two fixed limiting rollers inside, a support fixed to the top of the tank, a cleaning mechanism at the bottom of the support, and a strip-shaped opening at the back of the tank. This design circulates and pushes oxide residue floating on the surface of the molten zinc to the strip-shaped opening for discharge, thus preventing oxide residue from adhering to the surface of the steel strip during galvanizing and ensuring the quality of the galvanizing process. However, the above solution has certain limitations in practical use. In the above solution, multiple sets of rotating horizontal plates move the oxides on the surface of the galvanizing tank by pushing them. At this time, the rotating horizontal plates are prone to breaking large oxides into small particles. The filter screen in the storage box can usually only intercept larger impurities and cannot effectively filter micron-sized fine particles. Afterwards, the unfiltered fine oxide particles flow back to the galvanizing tank with the galvanizing liquid and will be adsorbed on the surface of the steel coil during the galvanizing process, resulting in defects such as uneven thickness and pitting of the galvanized layer, which seriously affects the product quality. Utility Model Content

[0004] The purpose of this application is to provide a surface treatment device for galvanized steel coils, which significantly reduces mechanical shear force through flexible contact and slow pushing, thus preventing large oxide particles from breaking into fine particles at the source. At the same time, the two-stage filtration structure significantly improves the interception capacity of oxides of different particle sizes, reducing the risk of unfiltered fine particles flowing back into the galvanizing bath with the galvanizing solution. These advantages solve the problems mentioned in the background art.

[0005] This application provides a surface treatment device for galvanized steel coils, employing the following technical solution: It includes a galvanizing tank, with a mounting frame fixedly connected to the upper side of the galvanizing tank. A reciprocating screw is rotatably connected to the inner side of the mounting frame, and a movable frame is threadedly connected to the outer side of the reciprocating screw. A fixed frame is fixedly connected to the outer side of the movable frame, and a scraper is fixedly connected to the bottom surface of the fixed frame. A driving assembly is provided on the outer side of the mounting frame, including a rotating shaft rotatably connected to the inner side of the mounting frame. One end of the rotating shaft is fixedly connected to one end of the reciprocating screw, and a worm gear is fixedly connected to the outer side of the rotating shaft. A worm is meshed with the outer side of the worm gear. Two symmetrical outlets are opened on the outer side of the galvanizing tank, and two symmetrical collection boxes are fixedly connected to the outer side of the galvanizing tank. A placement frame is fixedly connected to the inner side of each of the two collection boxes, and a coarse filter plate and a fine filter plate are provided on the inner side of the placement frame.

[0006] By adopting the above technical solution, and by setting the meshing transmission of the worm and worm wheel in the drive assembly, the reciprocating screw can be driven to rotate stably and slowly. This drives the moving frame to make linear reciprocating motion along the guide rod, which in turn drives the scraper at the bottom of the fixed frame to slowly push the oxides on the surface of the galvanizing tank, preventing large oxides from breaking into fine particles. This reduces filtration problems and coating defects caused by slag from the source. Then, the coarse filter plate and the fine filter plate form a two-stage filtration structure, which significantly improves the interception ability of oxides of different particle sizes and reduces the risk of fine particles flowing back into the galvanizing tank.

[0007] Preferably, the scraper and the fixing frame are fixedly connected by bolts, and the scraper is made of fluororubber.

[0008] By adopting the above technical solution, the scraper made of fluororubber material has high flexibility and resistance to zinc liquid corrosion. Its flexible contact with the oxide surface further disperses the force. Moreover, it can be detachably connected to the fixing frame by bolts, which facilitates quick replacement after wear, extends the service life of the equipment and ensures the stability of the slag removal effect.

[0009] Preferably, both ends of the worm are rotatably connected to a fixing plate, and the outer side of the fixing plate is fixedly connected to the outer side of the mounting bracket. A drive motor is fixedly embedded in the outer side of one of the fixing plates, and the output end of the drive motor is fixedly connected to one end of the worm.

[0010] By adopting the above technical solution, the meshing transmission of the worm and worm wheel provides a self-locking reduction drive for the reciprocating screw, ensuring that the scraper runs smoothly at low speed, avoiding mechanical disturbances that cause zinc liquid to splash and oxides to disperse, and ensuring the stability and reliability of the oxide removal process.

[0011] Preferably, the coarse filter plate is placed on the upper side of the placement rack, and the size of the coarse filter plate is adapted to the inner wall size of the collection box.

[0012] By adopting the above technical solution, the coarse filter plate and the inner wall of the collection box are matched in size to perform preliminary filtration of oxides, effectively intercept large oxide clumps, and reduce the clogging pressure of the fine filter plate.

[0013] Preferably, the fine filter plate is placed inside the placement rack, and the outer dimensions of the fine filter plate are adapted to the inner wall dimensions of the placement rack.

[0014] By adopting the above technical solution, the fine filter plate is placed inside the placement rack to form a secondary fine filtration layer, which can efficiently capture micron-sized particles after coarse filtration, further improve filtration efficiency, and prevent fine oxides from flowing back into the galvanizing bath.

[0015] Preferably, water pumps are fixedly installed on the outside of both collection boxes, and the input end of the water pump extends through the outside of the collection box to the inside of the collection box. The output end of both water pumps is fixedly connected to an infusion pipe, and the other end of the infusion pipe extends through the outside of the galvanizing tank to the inside of the galvanizing tank.

[0016] By adopting the above technical solution, the water pump can re-transport the galvanizing solution that has undergone multi-stage filtration in the collection tank to the galvanizing bath through the infusion pipe, thereby realizing the recycling of the galvanizing solution.

[0017] Preferably, the inner side of the mounting bracket is fixedly connected to two symmetrical guide rods, and the inner side of the movable bracket is slidably connected to the outer side of the guide rods.

[0018] By adopting the above technical solution, the sliding cooperation between the guide rod and the moving frame provides precise guidance for the reciprocating motion of the scraper, ensuring that the scraper always runs along a straight trajectory and improving the uniformity of oxide removal.

[0019] Preferably, two sets of symmetrical support frames are fixedly connected to the outer side of the galvanizing tank, and driven rollers are rotatably connected to the inner side of each set of support frames. Two symmetrical limiting rollers are rotatably connected to the inner side of the galvanizing tank.

[0020] By adopting the above technical solution, the driven roller and the limiting roller form a steel coil conveying channel, so that the steel coil moves stably through the galvanizing bath and is galvanized.

[0021] In summary, this application includes at least one of the following beneficial technical effects: This galvanized steel coil surface treatment equipment uses a worm gear and worm wheel meshing transmission to drive a reciprocating screw to rotate stably and slowly. This drives a moving frame to reciprocate linearly along a guide rod, causing the fluororubber scraper at the bottom of the fixed frame to horizontally push the oxides on the surface of the galvanizing bath at a low speed. The flexible contact and slow pushing method significantly reduces mechanical shearing force, preventing large oxides from breaking into fine particles at the source. Then, a two-stage filtration structure is formed by coarse and fine filter plates, which significantly improves the interception capacity of oxides of different particle sizes, reduces the risk of unfiltered fine particles flowing back into the galvanizing bath with the galvanizing solution, and improves the surface quality and production efficiency of the galvanized steel coil. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the entire application; Figure 2 This is a cross-sectional structural diagram of the entire application; Figure 3 This is a three-dimensional structural diagram of the reciprocating lead screw, scraper, and drive assembly of this application; Figure 4 This is a schematic diagram of the internal structure of the collection box in this application; Figure 5 For this application Figure 4 A magnified structural diagram of point A in the middle.

[0023] In the picture: 1. Galvanizing tank; 2. Mounting frame; 3. Reciprocating lead screw; 4. Moving frame; 5. Fixed frame; 6. Scraper; 7. Drive assembly; 701. Rotating shaft; 702. Worm gear; 703. Worm; 704. Fixed plate; 705. Drive motor; 8. Outlet; 9. Collection box; 10. Placement rack; 11. Coarse filter plate; 12. Fine filter plate; 13. Water pump; 14. Infusion pipe; 15. Guide rod; 16. Driven roller; 17. Limiting roller; 18. Support frame. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 This application will be described in further detail below.

[0025] Example 1: A surface treatment device for galvanized steel coils, please refer to... Figure 1 , Figure 3 and Figure 5The system includes a galvanizing tank 1, with a mounting frame 2 fixedly connected to the upper side of the galvanizing tank 1. A reciprocating screw 3 is rotatably connected to the inner side of the mounting frame 2, and a movable frame 4 is threadedly connected to the outer side of the reciprocating screw 3. A fixed frame 5 is fixedly connected to the outer side of the movable frame 4, and a scraper 6 is fixedly connected to the bottom surface of the fixed frame 5. The scraper 6 and the fixed frame 5 are fixedly connected by bolts. The scraper 6 is made of fluororubber, which has high flexibility and resistance to zinc liquid corrosion. Its flexible contact with the oxide surface further disperses the force, and its detachable connection to the fixed frame 5 via bolts facilitates quick replacement after wear, extending the service life of the equipment. To ensure the lifespan and stability of the slag removal effect, a drive assembly 7 is provided on the outer side of the mounting frame 2. The drive assembly 7 includes a rotating shaft 701 rotatably connected to the inner side of the mounting frame 2. One end of the rotating shaft 701 is fixedly connected to one end of the reciprocating screw 3. A worm gear 702 is fixedly connected to the outer side of the rotating shaft 701. A worm 703 is meshed with the outer side of the worm gear 702. Two symmetrical outlets 8 are opened on the outer side of the galvanizing tank 1. Two symmetrical collection boxes 9 are fixedly connected to the outer side of the galvanizing tank 1. A placement frame 10 is fixedly connected to the inner side of each of the two collection boxes 9. A coarse filter plate 11 and a fine filter plate 12 are provided on the inner side of the placement frame 10.

[0026] Please refer to Figure 4 and Figure 5 The coarse filter plate 11 is placed on the upper side of the placement rack 10. The size of the coarse filter plate 11 is adapted to the inner wall size of the collection box 9. The adaptation of the coarse filter plate 11 to the inner wall size of the collection box 9 can perform preliminary filtration of oxides, effectively trapping large oxide clumps and reducing the clogging pressure of the fine filter plate 12. The fine filter plate 12 is placed inside the placement rack 10. The outer size of the fine filter plate 12 is adapted to the inner wall size of the placement rack 10. The fine filter plate 12 placed inside the placement rack 10 forms a secondary fine filtration layer, which can efficiently capture micron-sized particles after coarse filtration, further improving filtration efficiency and preventing fine oxides from flowing back into the galvanizing bath 1. Example 2: A surface treatment device for galvanized steel coils, please refer to... Figure 1 and Figure 3 Both ends of the worm 703 are rotatably connected to a fixing plate 704, and the outer side of the fixing plate 704 is fixedly connected to the outer side of the mounting bracket 2. A drive motor 705 is fixedly embedded on the outer side of one of the fixing plates 704, and the output end of the drive motor 705 is fixedly connected to one end of the worm 703. The meshing transmission between the worm 703 and the worm wheel 702 provides a self-locking reduction drive for the reciprocating screw 3, ensuring that the scraper 6 runs smoothly at low speed, avoiding mechanical disturbance that causes zinc liquid to splash and oxides to disperse, and ensuring the stability and reliability of the oxide removal process.

[0027] Please refer to Figure 1 , Figure 2 and Figure 4Two water pumps 13 are fixedly installed on the outside of each collection tank 9, with the input end of the water pump 13 extending through the outside of the collection tank 9 and into the inside of the collection tank 9. The output ends of both water pumps 13 are fixedly connected to infusion pipes 14, with the other end of the infusion pipes 14 extending through the outside of the galvanizing tank 1 and into the inside of the galvanizing tank 1. The water pumps 13 transport the galvanizing solution, which has undergone multi-stage filtration in the collection tank 9, back to the galvanizing tank 1 through the infusion pipes 14, thus achieving the recycling of the galvanizing solution. Two symmetrical guide rods 15 are fixedly connected to the inside of the mounting frame 2, and the inside of the movable frame 4 is slidably connected to... On the outside of the guide rod 15, the sliding engagement between the guide rod 15 and the moving frame 4 provides precise guidance for the reciprocating motion of the scraper 6, ensuring that the scraper 6 always runs along a straight trajectory, thus improving the uniformity of oxide removal. Two sets of symmetrical support frames 18 are fixedly connected to the outside of the galvanizing tank 1. Driven rollers 16 are rotatably connected to the inside of both sets of support frames 18. Two symmetrical limiting rollers 17 are rotatably connected to the inside of the galvanizing tank 1. The driven rollers 16 and the limiting rollers 17 form a steel coil conveying channel, allowing the steel coil to move stably through the galvanizing tank 1 for galvanizing treatment.

[0028] The implementation principle of this application embodiment is as follows: When the equipment is working, firstly, the drive motor 705 drives the reciprocating screw 3 to rotate at a low speed through the worm gear 703 and worm wheel 702. At this time, the rotation of the reciprocating screw 3 causes the moving frame 4 to move linearly back and forth along the guide rod 15, thereby driving the fluororubber scraper 6 at the bottom of the fixed frame 5 to circulate and horizontally push the oxides on the surface of the galvanizing tank 1 at a low speed. At this time, the flexible contact and slow pushing of the scraper 6 prevents the oxides from breaking. Then, the oxides move with the scraper 6 to the outlet 8 and flow into the collection box. Inside the collection box 9, the coarse filter plate 11 on the placement rack 10 first intercepts large pieces of oxide, and the fine filter plate 12 further filters out fine particles. The multi-stage filtration system formed by the coarse filter plate 11 and the fine filter plate 12 ensures the purity of the plating solution. The galvanizing solution after two stages of filtration is returned to the galvanizing tank 1 by the water pump 13 through the delivery pipe 14, thereby realizing the recycling of the galvanizing solution and achieving efficient resource utilization. At the same time, the steel coil is guided by the driven roller 16 and the limiting roller 17 to be immersed in the galvanizing tank 1 in a stable posture to complete the galvanizing process.

[0029] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A surface treatment device for galvanized steel coils, comprising a galvanizing bath (1), characterized in that: A mounting frame (2) is fixedly connected to the upper side of the galvanizing tank (1). A reciprocating screw (3) is rotatably connected to the inner side of the mounting frame (2). A movable frame (4) is threadedly connected to the outer side of the reciprocating screw (3). A fixed frame (5) is fixedly connected to the outer side of the movable frame (4). A scraper (6) is fixedly connected to the bottom surface of the fixed frame (5). A drive assembly (7) is provided on the outer side of the mounting frame (2). The drive assembly (7) includes a rotating shaft (701) rotatably connected to the inner side of the mounting frame (2). One end of the rotating shaft (701) A worm gear (702) is fixedly connected to one end of the reciprocating screw (3), and a worm (703) is meshed with the outer side of the rotating shaft (701). Two symmetrical outlets (8) are opened on the outer side of the galvanizing tank (1). Two symmetrical collection boxes (9) are fixedly connected to the outer side of the galvanizing tank (1). A placement rack (10) is fixedly connected to the inner side of each of the two collection boxes (9). A coarse filter plate (11) and a fine filter plate (12) are provided on the inner side of the placement rack (10).

2. The surface treatment equipment for galvanized steel coils according to claim 1, characterized in that: The scraper (6) and the fixing frame (5) are fixedly connected by bolts, and the scraper (6) is made of fluororubber.

3. The surface treatment equipment for galvanized steel coils according to claim 1, characterized in that: Both ends of the worm (703) are rotatably connected to a fixing plate (704), and the outer side of the fixing plate (704) is fixedly connected to the outer side of the mounting bracket (2). A drive motor (705) is fixedly embedded on the outer side of one of the fixing plates (704), and the output end of the drive motor (705) is fixedly connected to one end of the worm (703).

4. The surface treatment equipment for galvanized steel coils according to claim 1, characterized in that: The coarse filter plate (11) is placed on the upper side of the placement rack (10), and the size of the coarse filter plate (11) is adapted to the inner wall size of the collection box (9).

5. The surface treatment equipment for galvanized steel coils according to claim 1, characterized in that: The fine filter plate (12) is placed inside the placement rack (10), and the outer dimensions of the fine filter plate (12) are adapted to the inner wall dimensions of the placement rack (10).

6. The surface treatment equipment for galvanized steel coils according to claim 1, characterized in that: Water pumps (13) are fixedly installed on the outside of both collection boxes (9), and the input end of the water pumps (13) extends through the outside of the collection box (9) to the inside of the collection box (9). The output ends of the two water pumps (13) are fixedly connected to infusion pipes (14), and the other end of the infusion pipes (14) extends through the outside of the galvanizing tank (1) to the inside of the galvanizing tank (1).

7. The surface treatment equipment for galvanized steel coils according to claim 1, characterized in that: The mounting bracket (2) has two symmetrical guide rods (15) fixedly connected to its inner side, and the movable bracket (4) is slidably connected to the outer side of the guide rods (15) on its inner side.

8. The surface treatment equipment for galvanized steel coils according to claim 1, characterized in that: Two sets of symmetrical support frames (18) are fixedly connected to the outside of the galvanizing tank (1). Driven rollers (16) are rotatably connected to the inside of the two sets of support frames (18). Two symmetrical limiting rollers (17) are rotatably connected to the inside of the galvanizing tank (1).

Images