A continuous hot-dip galvanizing device for steel plates

Abstract

The invention discloses a continuous hot-dip galvanizing device for steel plates, which relates to the technical field of steel galvanizing processing, and comprises a workbench for transporting steel plates for galvanizing, a winding roller for winding steel plates, a galvanizing tank for storing zinc liquid, and a main driving roller placed in the galvanizing tank for deforming the steel plates for galvanizing. The invention also comprises a horizontal zinc replenishing structure and a driving component arranged on the workbench for detecting the thickness of the zinc layer of the steel plates after galvanizing. The driving component respectively drives a liquid pumping component for pumping liquid and replenishing zinc and a purging component for purging the surface of the steel plates and exposing pits on the surface of the steel plates. The purging components are specifically two and are in air outlet and air extraction states respectively, thereby significantly improving the quality and uniformity of galvanizing, as well as automating the galvanizing process and recycling the zinc liquid, which not only greatly improves the production efficiency and product quality, ensures the aesthetics and corrosion resistance of the steel plate surface, but also reduces the production cost, reduces resource waste and environmental pollution.

Description

Technical Field

[0001] The present invention relates to the field of hot-dip galvanizing processing of technical steel, and specifically to a continuous hot-dip galvanizing device for steel plates. Background Art

[0002] A continuous hot-dip galvanizing device for steel plates is an efficient metal anti-corrosion treatment equipment. It utilizes the good anti-oxidation and corrosion resistance of zinc to evenly, completely and tightly combine and wrap a zinc layer on the outer layer of the steel plate at a relatively high temperature. When this protective film is damaged by the outside world, a new protective film layer will be formed at the damaged part, thus playing a role in protecting the steel plate substrate from oxidation and corrosion.

[0003] For example, a hot-dip galvanizing equipment and method for steel strips with a publication number of CN115323303A and an authorization announcement date of November 11, 2022 can realize the rotation of the conveying rollers on the conveying mechanism to convey the steel strip, place the steel strip in a bent state above the galvanizing tank, and the cylinder moves the galvanizing tank upward to immerse the bath liquid in the steel strip, facilitating the galvanizing of the long-distance steel strip in a bent state and improving the galvanizing efficiency of the steel strip. By moving the moving plate inside the U-shaped panel, the side of the steel strip contacts the wiping strip and moves on the surface of the wiping strip to clean the side of the steel strip and ensure the quality of the subsequent galvanizing of the steel strip. However, after the steel strip is galvanized, due to the characteristics of the hot-dip galvanizing process, the zinc layer is often relatively thick. Such a thick zinc layer is prone to breakage or damage due to its excessive thickness during the subsequent bending and winding processes, which not only affects the anti-corrosion performance of the steel plate but may also have an adverse impact on its mechanical properties.

[0004] In addition, before the steel plate or steel strip undergoes hot-dip galvanizing treatment, its surface state is a crucial consideration. During the production and processing of the steel strip, it has gone through multiple processes, including cutting, stamping, transportation and other links, and these processes may cause certain damage to the surface of the steel strip. For example, the friction of the tool during the cutting process may leave fine scratches; during stamping and forming, the direct contact between the die and the steel strip may cause local compression deformation to form small pits; during transportation and storage, the steel strip may also have impact marks due to collisions or improper stacking, which will leave pits or uneven areas on the surface of the steel strip. When the steel plate enters the high-temperature zinc liquid, its material will soften to a certain extent. This softened state makes the steel plate more prone to deformation when it comes into hard contact with the roller shaft subsequently. Due to the hard contact force exerted by the roller shaft, the cracks, pits and bubbles and other defects originally existing on the surface of the steel plate will become more obvious during the extrusion process, especially on the side that is in direct contact with the roller shaft. This is because the strong extrusion effect of the roller shaft exacerbates the exposure of these defects, making them more prominent on this side. In contrast, the other side of the steel plate does not come into hard contact with the roller shaft, so the extrusion effect is smaller, and the pits and other defects on its surface will not be so obviously exposed;

[0005] Although these surface pits are tiny, they will have a significant impact on the subsequent galvanizing process. When the steel strip is immersed in the galvanizing tank, the high-temperature molten zinc will quickly cover and penetrate every corner of the surface of the steel strip. For a flat and flawless surface, the zinc liquid can evenly and smoothly cover it, forming a uniform and dense zinc layer. However, for those surface areas with pits, the filling behavior of the zinc liquid becomes complicated and difficult to control;

[0006] Due to the different shapes, sizes and depths of pits, the zinc liquid often fills these areas unevenly. Some pits may form bulges due to excessive zinc filling, and these bulges may be more likely to peel off or crack due to stress concentration during subsequent processing and use; while some pits may form depressions due to insufficient zinc filling, making the surface after galvanizing uneven, seriously affecting the overall aesthetics and surface quality of the steel; more seriously, these surface irregularities may also have an adverse effect on the subsequent processing and use of the steel. For example, in processes such as stamping, bending or welding, bulges and depressions may become areas of stress concentration, making the steel more likely to break or deform in these areas. In addition, for steel products that require high-precision processing, such as automotive parts, precision machinery parts, etc., surface irregularities will directly affect their assembly accuracy and performance.

[0007] In view of the above problems, it is urgent to carry out innovative design based on the original steel plate continuous hot-dip galvanizing device. Summary of the invention

[0008] The technical solution of the present invention aims at the technical problem that the existing technical solution is too single, and provides a solution that is significantly different from the existing technology. Specifically, the purpose of the present invention is to provide a continuous hot-dip galvanizing device for steel plates to solve the problem of irregular surface after galvanizing caused by pits on the front surface of the steel strip galvanized mentioned in the above background technology.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a continuous hot-dip galvanizing device for steel plates, comprising a workbench for transporting steel plates for galvanizing, a winding roller for winding steel plates, a galvanizing tank for storing zinc liquid, and a main drive roller placed in the galvanizing tank for deforming the steel plates for galvanizing, and also comprising a horizontal zinc replenishing structure and a driving component arranged on the workbench for detecting the thickness of the zinc layer of the steel plate after galvanizing, the driving component respectively drives a liquid extraction component connected to the workbench for extracting liquid and replenishing zinc, and a purge component for purging the surface of the steel plate and exposing the pits on the surface of the steel plate, and the purge components are specifically two, and are in the exhaust and exhaust states respectively.

[0010] Preferably, an outer wall on one side of the workbench is rotatably provided with transmission gears distributed in an array, and one of the transmission gears is connected to the main drive roller through a pulley transmission. The number of the transmission gears is specific to three and they mesh with each other. One end of the transmission gear is rotatably connected to the driving assembly, and the inner wall of the workbench is respectively connected with fixing parts and a fixing plate for fixing the liquid extraction assembly and the purge assembly.

[0011] Preferably, the horizontal zinc supplementation structure includes a truss with both ends fixed to the inner wall of the workbench, a horizontal control frame rotatably arranged at the bottom of the truss, and a zinc supplementation ball bin fixedly connected to the horizontal control frame. A slide groove is provided in the horizontal control frame, and a counterweight slider is slidably arranged in the slide groove for controlling the zinc supplementation ball bin to tilt and fit the surface of the steel plate.

[0012] Preferably, one side of the zinc replenishing ball bin is fixedly connected to a pit detection end, and a ball-drop type pit sensing opening and closing door control component for detecting pits on the surface of the steel plate is arranged in the pit detection end; one side of the zinc replenishing ball bin is fixedly connected to a liquid outlet, and the outer wall of the liquid outlet is fixedly connected to a scraper for balancing the thickness of the zinc layer of the steel plate after galvanizing.

[0013] Preferably, the ball-drop type pit sensing opening and closing door control component includes a detection ball that senses the pit on the surface of the steel plate, and the detection ball is confined and arranged in the pit detection end and distributed in an array, a pressure plate that is squeezed and lifted by the detection ball, a trigger block that rises and falls synchronously with the pressure plate through a connecting rod, an edge sealing plate that is touched by the trigger block to open and close the liquid outlet, and a sliding rod for the pressure plate to slide under pressure.

[0014] Preferably, the driving assembly includes an eccentric connecting rod coaxially connected to the transmission gear, a first connecting rod rotatably arranged on the eccentric connecting rod for driving the liquid pumping assembly to pump liquid under negative pressure, and a second connecting rod for driving the purge assembly to pump air under negative pressure. The liquid pumping assembly includes a liquid pumping valve, and the bottom of the liquid pumping valve is fixedly connected to a liquid pumping pipe for one-way liquid pumping. The purge assembly includes an air extraction valve, and the bottom of the air extraction valve is fixedly connected to an air extraction port for one-way air extraction. Piston rods are slidably arranged in the liquid pumping valve and the air extraction valve, and the tops of the piston rods are rotatably connected to the first connecting rod and the second connecting rod, respectively.

[0015] Preferably, one side outer wall of the liquid extraction valve is fixedly connected with a liquid inlet pipe, the end of the liquid inlet pipe is fixedly connected with a rotating interface, and the rotating interface is connected with the zinc replenishing ball bin.

[0016] Preferably, symmetrically distributed air outlet nozzles are fixedly connected inside the fixed plate, and the air outlet nozzles are in the same plane as the inclined steel plate after galvanizing, and the air outlet nozzles are connected to the air extraction valve through an air supply pipe.

[0017] Preferably, one side outer wall of the zinc replenishing ball bin is fixedly connected to a drain pipe for circulating zinc liquid.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: the quality and uniformity of galvanizing are significantly improved through the setting of the horizontal zinc replenishing structure and the ball-drop type pit induction opening and closing door control component. The horizontal zinc replenishing structure can ensure that the zinc replenishing ball bin always fits the surface of the steel plate, and accurately replenishes zinc according to the pit conditions on the surface of the steel plate, thereby avoiding the problem of excessively thick zinc layer in the traditional galvanizing process. At the same time, the ball-drop type pit induction opening and closing door control component can keenly sense the pits on the surface of the steel plate, and by cooperating with the liquid pumping component, it controls the opening and closing of the liquid outlet to ensure that the zinc liquid can be accurately and timely filled into the pits, thereby improving the uniformity and density of the galvanized layer. It not only improves the overall aesthetics and quality of the steel plate surface, but also significantly enhances the anti-corrosion and mechanical properties of the steel plate;

[0019] As the transmission gear rotates, the eccentric connecting rod drives the first connecting rod and the second connecting rod to reciprocate, thereby driving the piston rods of the liquid extraction valve and the air extraction valve to work, reducing labor costs while ensuring the stability and reliability of the galvanizing process. In addition, the purge assembly realizes the negative pressure suction and push of gas through the cooperation of the air extraction valve and the piston rod, which can evenly purge the surface of the steel plate, exposing the pits on the steel plate, providing favorable conditions for subsequent zinc supplementation work;

[0020] The zinc replenishment ball bin is connected to the liquid inlet pipe through a rotating interface, and can receive zinc liquid from the liquid extraction valve. The zinc replenishment ball bin is set through the rotating interface, and will not drive the liquid inlet pipe and the liquid extraction valve to rotate when rotating and tilting. The zinc replenishment ball bin can also return the zinc liquid that does not need zinc replenishment to the galvanizing tank through the drain pipe, realizing the recycling of zinc liquid and maintaining the temperature of zinc liquid, which not only reduces production costs, but also reduces resource waste and environmental pollution. In addition, the design of the scraper can re-smooth the zinc layer on the surface of the steel plate, so that its thickness and aesthetics meet the requirements, further improving the quality of galvanizing.

[0021] Through the present invention, the quality and uniformity of galvanizing are significantly improved, and the galvanizing process is automated and the zinc liquid is recycled, which not only greatly improves the production efficiency and product quality, ensures the aesthetics and corrosion resistance of the steel plate surface, but also reduces production costs, reduces resource waste and environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is a schematic diagram of another preferred angle of the overall structure of the present invention.

[0024] Figure 3 It is a schematic diagram of the horizontal zinc supplementation structure within the overall structure of the present invention.

[0025] Figure 4This is another preferred schematic diagram of the horizontal zinc supplementation structure within the overall structure of the present invention.

[0026] Figure 5 It is a detailed schematic diagram of the horizontal zinc supplementation structure of the present invention.

[0027] Figure 6 It is another preferred angle schematic diagram of the detailed state of the horizontal zinc supplementation structure of the present invention.

[0028] Figure 7 It is a schematic diagram of detecting zinc supplement components in the horizontal zinc supplement structure of the present invention.

[0029] Figure 8 It is a schematic diagram of the plate surface purge assembly of the present invention.

[0030] Fig. 9 It is a partially enlarged schematic diagram of the internal zinc supplementation components of the horizontal zinc supplementation structure of the present invention.

[0031] In the figure: 1, workbench; 101, fixing part; 2, main drive roller; 3, pulley; 4, transmission gear; 5, eccentric connecting rod; 501, first connecting rod; 502, second connecting rod; 6, truss; 7, zinc replenishing ball bin; 701, drain pipe; 702, pit detection end; 703, rotating interface; 8, horizontal control frame; 801, counterweight slider; 802, slide; 803, rotating part; 9, liquid extraction valve; 901, liquid extraction pipe; 10, air extraction valve; 11, air extraction port; 12, fixing plate; 13, air outlet nozzle; 14, air supply pipe; 15, scraper; 16, liquid outlet; 17, liquid inlet pipe; 18, piston rod; 19, detection ball; 20, slide rod; 21, pressure plate; 22, connecting rod; 23, trigger block; 24, edge sealing plate. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figures 1 to 9The present invention provides a technical solution: a continuous hot-dip galvanizing device for steel plates, comprising a workbench 1 for transporting steel plates for galvanizing, a winding roller for winding steel plates, a galvanizing tank for storing zinc liquid, and a main driving roller 2 placed in the galvanizing tank for deforming the steel plates for galvanizing, and also comprising a horizontal zinc replenishing structure and a driving component arranged on the workbench 1 for detecting the thickness of the zinc layer of the steel plates after galvanizing, the driving component respectively drives a liquid extraction component connected to the workbench 1 for extracting liquid and replenishing zinc, and a purge component for purging the surface of the steel plates and exposing the pits on the surface of the steel plates, and there are two purge components, which are in the exhaust and exhaust states respectively.

[0034] The outer wall of one side of the workbench 1 is rotatably provided with transmission gears 4 distributed in an array, and one of the transmission gears 4 is connected to the main driving roller 2 through a pulley 3. There are three transmission gears 4 and they are meshed with each other. One end of the transmission gear 4 is rotatably connected to the driving assembly. The inner wall of the workbench 1 is respectively connected with a fixing part 101 and a fixing plate 12 for fixing a liquid extraction assembly and a purge assembly.

[0035] The horizontal zinc replenishing structure includes a truss 6 whose two ends are fixed to the inner wall of the workbench 1, a horizontal control frame 8 that is rotatably arranged at the bottom of the truss 6 through a rotating member 803, and a zinc replenishing ball bin 7 that is fixedly connected to the horizontal control frame 8. A slide groove 802 is provided in the horizontal control frame 8, and a counterweight slider 801 is slidably arranged in the slide groove 802 for controlling the zinc replenishing ball bin 7 to tilt and fit the surface of the steel plate.

[0036] One side of the zinc replenishing ball bin 7 is fixedly connected to a pit detection end 702, and a ball-drop type pit sensing opening and closing door control component for detecting pits on the surface of the steel plate is arranged in the pit detection end 702. One side of the zinc replenishing ball bin 7 is fixedly connected to a liquid outlet 16, and the outer wall of the liquid outlet 16 is fixedly connected to a scraper 15 for balancing the thickness of the zinc layer of the steel plate after galvanizing.

[0037] The ball-drop type pit sensing opening and closing door control component includes a detection ball 19 that senses the pit on the surface of the steel plate, and the detection ball 19 is confined and arranged in the pit detection end 702 and distributed in an array, a pressure plate 21 that is squeezed and lifted by the detection ball 19, a trigger block 23 that rises and falls synchronously with the pressure plate 21 through a connecting rod 22, an edge sealing plate 24 that is touched by the trigger block 23 to open and close the liquid outlet 16, and a sliding rod 20 for the pressure plate 21 to slide under pressure.

[0038] The driving assembly includes an eccentric connecting rod 5 coaxially connected to the transmission gear 4, a first connecting rod 501 rotatably arranged on the eccentric connecting rod 5 for driving the liquid extraction assembly to extract liquid and deliver liquid under negative pressure, and a second connecting rod 502 for driving the purge assembly to extract air and deliver air under negative pressure. The liquid extraction assembly includes a liquid extraction valve 9, and the bottom of the liquid extraction valve 9 is fixedly connected to a liquid extraction pipe 901 for one-way liquid extraction. The purge assembly includes an air extraction valve 10, and the bottom of the air extraction valve 10 is fixedly connected to an air extraction port 11 for one-way air extraction. Piston rods 18 are slidably arranged in both the liquid extraction valve 9 and the air extraction valve 10, and the tops of the piston rods 18 are rotatably connected to the first connecting rod 501 and the second connecting rod 502, respectively.

[0039] One side outer wall of the liquid extraction valve 9 is fixedly connected with a liquid inlet pipe 17 , and the end of the liquid inlet pipe 17 is fixedly connected with a rotating interface 703 , and the rotating interface 703 is connected with the zinc supplement ball bin 7 .

[0040] The fixed plate 12 is fixedly connected with symmetrically distributed gas outlet nozzles 13 , and the gas outlet nozzles 13 are in the same plane as the inclined steel plate after galvanizing. The gas outlet nozzles 13 are connected to the air extraction valve 10 through the air supply pipe 14 .

[0041] One side outer wall of the zinc replenishing ball bin 7 is fixedly connected with a drain pipe 701 for circulating and transporting zinc liquid.

[0042] Working principle: First, one end of the steel plate is fixed on the winding roller. As the winding roller rotates, the steel plate begins to move. When the steel plate moves to the galvanizing tank area, the main drive roller 2 plays a key role. It not only presses down the steel plate so that its inner and outer surfaces can be fully immersed in the zinc liquid in the galvanizing tank for galvanizing, but also the main drive roller 2 rotates due to the force of the winding roller winding the steel plate during galvanizing. The rotation of the main drive roller 2 drives the rotation of the pulley 3, which in turn drives the transmission gear 4 connected to it to start rotating. Since the transmission gears 4 are meshed, the rotation of one transmission gear 4 will drive the other two transmission gears 4 to rotate synchronously, forming a complete transmission system.

[0043] As the transmission gear 4 rotates, the eccentric connecting rod 5 also rotates. This rotation process provides a power source for the subsequent liquid extraction, zinc replenishment and purging work. The eccentric connecting rod 5 is provided with a first connecting rod 501 and a second connecting rod 502, which are used to drive the liquid extraction component and the purging component respectively. When the eccentric connecting rod 5 rotates, the first connecting rod 501 and the second connecting rod 502 will respectively drive the piston rod 18 to perform reciprocating pumping and pressure movements in the liquid extraction valve 9 and the air extraction valve 10;

[0044] When the piston rod 18 is pressed down, the zinc liquid in the pumping valve 9 is squeezed out and enters the zinc replenishing ball bin 7 through the liquid inlet pipe 17. This process provides a sufficient source of zinc liquid for the subsequent zinc replenishing work. At the same time, in order to maintain the recycling of zinc liquid, a drain pipe 701 is also set on one side of the zinc replenishing ball bin 7 to return the zinc liquid that does not need zinc replenishment to the galvanizing tank;

[0045] The purge assembly realizes negative pressure suction and push of gas through the cooperation of the air extraction valve 10 and the piston rod 18. One of the air extraction valves 10 is in the suction state, sucking in external air; the other air extraction valve 10 is in the push state, and the sucked air is transported to the air outlet nozzle 13 through the air delivery pipe 14. The air outlet nozzle 13 is kept at the same horizontal plane as the galvanized steel plate, and can evenly blow the surface of the steel plate to expose the pits on the steel plate;

[0046] When the pits on the steel plate surface are exposed, the detection ball 19 will fall down and release the pressure on the pressure plate 21 when it senses the pits on the steel plate surface. The pressure plate 21 drives the trigger block 23 to move through the connecting rod 22, thereby releasing the pressure on the edge plate 24. At this time, the edge plate 24 slides and opens the notch of the liquid outlet 16, so that the zinc liquid can be discharged smoothly, and the zinc is replenished in the pits through the liquid outlet 16;

[0047] The detection ball 19 and the scraper 15 fit the surface of the steel plate. When the steel plate is in the process of winding, a natural elastic recovery phenomenon will occur due to the existence of internal stress. This phenomenon will cause the edge of the steel plate to tilt laterally to a certain extent. At this time, the counterweight slider 801 will slide in the slide 802, so that the zinc replenishing ball bin 7 and the steel plate always keep tilting synchronously. In this way, no matter how the steel plate tilts, the zinc replenishing ball bin 7 can always fit the surface of the steel plate to ensure the smooth progress of the zinc replenishing work. When the steel plate is reset to a horizontal state, the counterweight slider 801 will also return to the middle position of the slide 802 to keep the zinc replenishing ball bin 7 in a horizontal state;

[0048] Finally, when the steel plate is finished with galvanizing or zinc supplementation, it will pass through the bottom of the scraper 15. The scraper 15 can re-smooth the zinc layer on the surface of the steel plate to meet the requirements of thickness and aesthetics.

[0049] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A continuous hot-dip galvanizing device for steel plates, comprising a workbench (1) for transporting steel plates for galvanizing, a winding roller for winding the steel plates, a galvanizing tank for storing zinc liquid, and a main drive roller (2) placed in the galvanizing tank for deforming the steel plates for galvanizing, characterized in that: It also includes a horizontal zinc replenishment structure and a driving component arranged on the workbench (1) for detecting the thickness of the zinc layer of the steel plate after galvanizing, wherein the driving component respectively drives a liquid extraction component for extracting liquid for zinc replenishment and a purging component for purging the surface of the steel plate and exposing the pits on the surface of the steel plate, wherein the purging components are specifically two and are in the air outlet and air extraction states respectively, and the horizontal zinc replenishment structure includes a zinc replenishment ball bin (7), one side of the zinc replenishment ball bin (7) is fixedly connected to a pit detection end (702), and a ball drop-type pit induction opening and closing door control component for detecting pits on the surface of the steel plate is arranged in the pit detection end (702), one side of the zinc replenishment ball bin (7) is fixedly connected to a liquid outlet (16), and the liquid outlet The outer wall of (16) is fixedly connected with a scraper (15) for balancing the thickness of the zinc layer of the steel plate after galvanizing. The ball-drop type pit induction opening and closing door control component comprises a detection ball (19) for sensing the pit on the surface of the steel plate, and the detection ball (19) is limitedly set in the pit detection end (702) and distributed in an array, a pressure plate (21) that is squeezed and lifted by the detection ball (19), a trigger block (23) that rises and falls synchronously with the pressure plate (21) through a connecting rod (22), an edge sealing plate (24) that is touched by the trigger block (23) to open and close the liquid outlet (16), and a sliding rod (20) for the pressure plate (21) to slide under pressure. The liquid extraction component replenishes the extracted zinc liquid into the zinc replenishing ball bin (7).

2. A continuous hot-dip galvanizing device for steel plates according to claim 1, characterized in that: An outer wall of one side of the workbench (1) is rotatably provided with transmission gears (4) distributed in an array, and one of the transmission gears (4) is transmission-connected to the main drive roller (2) via a pulley (3). Specifically, there are three transmission gears (4) which mesh with each other. One end of the transmission gear (4) is rotationally connected to a driving component. The inner wall of the workbench (1) is respectively connected with a fixing member (101) and a fixing plate (12) for fixing a liquid extraction component and a purge component.

3. A continuous hot-dip galvanizing device for steel plates according to claim 1, characterized in that: The horizontal zinc supplementation structure further comprises a truss (6) whose two ends are fixed to the inner wall of the workbench (1) and a horizontal control frame (8) rotatably arranged at the bottom of the truss (6) via a rotating member (803); the zinc supplementation ball bin (7) is fixedly connected to the horizontal control frame (8); a slide groove (802) is provided in the horizontal control frame (8); and a counterweight slider (801) is slidably arranged in the slide groove (802) for controlling the zinc supplementation ball bin (7) to tilt and fit the surface of the steel plate.

4. A continuous hot-dip galvanizing device for steel plates according to claim 2, characterized in that: The driving assembly comprises an eccentric connecting rod (5) coaxially connected to the transmission gear (4), a first connecting rod (501) rotatably arranged on the eccentric connecting rod (5) for driving the liquid extraction assembly to extract liquid and deliver liquid under negative pressure, and a second connecting rod (502) for driving the purge assembly to extract air and deliver air under negative pressure. The liquid extraction assembly comprises a liquid extraction valve (9), and the bottom of the liquid extraction valve (9) is fixedly connected to a liquid extraction pipe (901) for one-way liquid extraction. The purge assembly comprises an air extraction valve (10), and the bottom of the air extraction valve (10) is fixedly connected to an air extraction port (11) for one-way air extraction. Piston rods (18) are slidably arranged in the liquid extraction valve (9) and the air extraction valve (10), and the tops of the piston rods (18) are rotatably connected to the first connecting rod (501) and the second connecting rod (502), respectively.

5. A continuous hot-dip galvanizing device for steel plates according to claim 4, characterized in that: An outer wall on one side of the liquid extraction valve (9) is fixedly connected to a liquid inlet pipe (17), an end of the liquid inlet pipe (17) is fixedly connected to a rotating interface (703), and the rotating interface (703) is connected to the zinc replenishing ball bin (7).

6. The continuous hot-dip galvanizing device for steel plates according to claim 4, characterized in that: The fixed plate (12) is fixedly connected with symmetrically distributed air outlet nozzles (13), and the air outlet nozzles (13) are in the same plane as the galvanized inclined steel plate. The air outlet nozzles (13) are connected to the air extraction valve (10) via an air delivery pipe (14).

7. The continuous hot-dip galvanizing device for steel plates according to claim 3, characterized in that: One side outer wall of the zinc replenishing ball bin (7) is fixedly connected to a liquid discharge pipe (701) for circulating and transporting zinc liquid.

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