A continuous hot-dip galvanizing air-knife edge baffle device
By designing an adjustable air knife side baffle device, the problems of inaccurate airflow control and inconvenient maintenance caused by the fixed side baffle structure were solved, thereby improving the adaptability of strip width and the uniformity of coating.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN LIANSHENG NEW MATERIALS CO LTD
- Filing Date
- 2025-08-26
- Publication Date
- 2026-07-21
AI Technical Summary
In existing continuous hot-dip galvanizing air knife systems, the side baffle structure is fixed and cannot be flexibly adjusted according to the width of the strip steel, resulting in inaccurate airflow control at the edges, uneven coating thickness, and inconvenient maintenance.
Design an air knife edge baffle device including an adjustable bracket and modular arc-shaped baffles. The baffle position can be precisely adjusted by driving the transverse guide rail assembly with an adjusting screw. The arc-shaped baffle module is connected by a quick-change buckle structure and elastic clamping parts to ensure airflow uniformity and convenient maintenance.
It enables flexible adaptation to strips of different widths, improves the uniformity of airflow at the edges, reduces fluctuations in zinc layer thickness, enhances coating quality and operational efficiency, and reduces maintenance costs and downtime.
Smart Images
Figure CN224530989U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of galvanizing technology, specifically to a continuous hot-dip galvanizing air knife edge baffle device. Background Technology
[0002] In continuous hot-dip galvanizing production, after passing through the zinc pot, the strip steel is swept across its surface by a high-speed airflow through an air knife system to control the coating thickness and ensure uniform coating. The air knife edge baffles, as key auxiliary components, are installed at both ends of the air knife to limit the diffusion of airflow at the edges of the strip steel, preventing problems such as excessively thin edge coatings or splashing and zinc buildup, thus playing a crucial role in improving coating quality.
[0003] Currently, in continuous hot-dip galvanizing air knife systems, the structural design of the edge baffle directly affects the control effect of airflow at the edge of the strip. Most existing edge baffles are integral fixed structures, which are rigidly connected to the air knife body by bolts. The edge of the baffle is a fixed straight line or a simple arc design, which cannot flexibly adjust the shape and position of the effective working area of the baffle according to the change of strip width. Especially when producing strips of different widths, the edge airflow control capability is limited, and eddies are easily formed between the baffle and the edge of the strip, or the airflow shielding is insufficient, resulting in uneven zinc layer thickness at the edge, and defects such as edge thickness or edge thinness. In addition, zinc dross is easy to accumulate at the edge of the baffle, requiring frequent cleaning and maintenance, which affects the efficiency of continuous operation and the surface quality of the coating. Utility Model Content
[0004] The purpose of this utility model is to provide a continuous hot-dip galvanizing air knife edge baffle device to solve the problems mentioned in the background art, such as the fixed edge baffle structure in the current continuous hot-dip galvanizing air knife system, which cannot be flexibly adjusted according to the strip width, resulting in inaccurate edge airflow control, uneven coating thickness, and inconvenient maintenance.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a continuous hot-dip galvanizing air knife edge baffle device, comprising an air knife body, with edge baffles at both ends of the air knife body. Each edge baffle includes a base plate fixedly installed at the end of the air knife body. An adjusting bracket is slidably connected to the front end of the base plate via a transverse guide rail assembly. Multiple sets of independently detachable arc-shaped baffle modules are mounted side-by-side on the adjusting bracket along the vertical direction. Each set of arc-shaped baffle modules consists of a main baffle with an outwardly inclined front end and auxiliary guide plates located on its upper and lower sides. The main baffle is fixed to the adjusting bracket via a quick-change buckle structure. The auxiliary guide plates are connected to the side of the main baffle via elastic clamping members. The transverse position of the adjusting bracket is driven by an adjusting screw set on the base plate.
[0006] Preferably, the transverse guide rail assembly includes two parallel dovetail guide rails disposed on the front end face of the substrate, and the back of the adjustment bracket is provided with a sliding groove that slides with the dovetail guide rails.
[0007] Preferably, the front end angle of the main baffle in the arc-shaped baffle module is 8°-12°, and its arc curvature radius is adapted to the curvature of the strip edge transition zone.
[0008] Preferably, the quick-change buckle structure includes a U-shaped seat on the adjustment bracket, a pressure rod hinged to the U-shaped seat, and a slot on the back of the main baffle. The end of the pressure rod is provided with a locking head that cooperates with the slot on the back of the main baffle.
[0009] Preferably, the elastic clamping member is a U-shaped metal spring sheet, with its two ends embedded in the limiting grooves on the sides of the main baffle and the auxiliary guide plate, respectively.
[0010] Preferably, one end of the adjusting screw abuts against the side wall of the adjusting bracket, and the other end extends out of the substrate and is equipped with a handwheel, and the adjusting screw is threadedly engaged with the substrate.
[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows: This continuous hot-dip galvanizing air knife edge baffle device can flexibly match the production needs of strip steel of different widths, effectively improve the uniformity of edge airflow, reduce zinc layer thickness fluctuations, and facilitate local maintenance and replacement, thereby improving coating quality and work efficiency. The device achieves precise adjustment of the overall baffle position through the cooperation of the adjusting screw and the transverse guide rail assembly. The quick-change snap-fit structure and modular arc-shaped baffle module design facilitate rapid replacement and combination configuration of the main baffle. The outward tilt angle of the main baffle and the synergistic structure of the auxiliary guide plate and elastic clamping component optimize the edge airflow guidance, suppress eddies and zinc splashing, and significantly improve the uniformity and stability of the edge coating. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of a continuous hot-dip galvanizing air knife edge baffle device according to the present invention; Figure 2 This is a front view of the outer side structure of the adjusting bracket of the continuous hot-dip galvanizing air knife edge baffle device of this utility model; Figure 3 This is a top view of the outer side of the adjusting bracket of the continuous hot-dip galvanizing air knife edge baffle device of this utility model.
[0013] In the figure: 1. Air knife body; 2. Side baffle; 3. Base plate; 31. Dovetail guide rail; 4. Adjustment bracket; 5. Arc-shaped baffle module; 51. Main baffle; 52. Auxiliary guide plate; 6. Quick-change buckle structure; 61. U-shaped seat; 62. Pressure rod; 7. Elastic clamping component; 8. Adjustment screw. Detailed Implementation
[0014] 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.
[0015] Please see Figure 1-3This utility model provides a technical solution: a continuous hot-dip galvanizing air knife edge baffle device, including an air knife body 1, with edge baffles 2 at both ends of the air knife body 1. The edge baffle 2 includes a base plate 3 fixedly installed at the end of the air knife body 1. The base plate 3 is detachably fixed to the mounting flange at the end of the air knife body 1 by a high-strength bolt assembly, facilitating overall disassembly and replacement. An adjusting bracket 4 is slidably connected to the front end of the base plate 3 through a transverse guide rail assembly. A sealed dustproof cover can be set between the adjusting bracket 4 and the base plate 3 to prevent zinc ash and dust from entering the guide rail area and affecting the sliding performance. Multiple sets of independently detachable arc-shaped baffle modules 5 are installed side by side along the vertical direction on the adjusting bracket 4. Each set of arc-shaped baffle modules 5 consists of a main baffle 51 with an outwardly inclined front end and a baffle located at the front end of the main baffle 51. The main baffle 51 is fixed to the adjusting bracket 4 by a quick-change buckle structure 6, and the U-shaped seat 61 is fixed to the front mounting surface of the adjusting bracket 4 by welding. The auxiliary baffle 52 is connected to the side of the main baffle 51 by an elastic clamp 7. The lateral position of the adjusting bracket 4 is driven by an adjusting screw 8 set on the base plate 3. The threaded part of the adjusting screw 8 and the base plate 3 is provided with an anti-loosening nut to prevent it from loosening on its own under vibration. This structure pushes the adjusting bracket 4 to slide along the lateral guide rail assembly on the base plate 3 by adjusting the adjusting screw 8, so as to realize the lateral fine adjustment of the overall baffle position to adapt to the edge alignment requirements of strips of different widths. Then, the main baffle 51 is quickly locked to the adjusting bracket 4 by using the quick-change buckle structure 6. To ensure stability under airflow impact, the outward-curving design of the main baffle 51 effectively guides the high-speed airflow towards the strip surface, reducing airflow separation and eddy current generation. Simultaneously, the auxiliary guide vanes 52 on the upper and lower sides are connected to the sides of the main baffle 51 via elastic clamps 7, generating slight elastic deformation under airflow action to further optimize the local flow field distribution and suppress zinc splashing. Multiple sets of arc-shaped baffle modules 5 are arranged in parallel along the vertical direction, allowing selective installation based on the strip edge height to form a continuous shielding surface matching the strip edge curvature. This precisely controls the edge airflow speed and coverage, effectively avoiding edge thickness or thinness defects caused by insufficient or excessive airflow shielding. Furthermore, when individual main baffles 51 or auxiliary guide vanes 52 accumulate zinc or are damaged... It can be disassembled and replaced individually without affecting the overall structure, significantly reducing maintenance costs and downtime. It solves the problems of existing technologies, such as the inability of integral fixed baffles to flexibly adjust with changes in strip specifications, inaccurate edge airflow control, poor coating uniformity, and inconvenient maintenance. The transverse guide rail assembly includes two parallel dovetail guide rails 31 on the front end face of the substrate 3. The dovetail guide rails 31 are fastened with screws and precisely positioned on the substrate 3 with the aid of positioning pins. The back of the adjusting bracket 4 is provided with a sliding groove that slides with the dovetail guide rails 31. When the adjusting screw 8 pushes the adjusting bracket 4, the sliding groove on the back of the adjusting bracket 4 slides stably along the dovetail guide rails 31, effectively constraining the degree of freedom of the adjusting bracket 4 during transverse movement and preventing it from deflecting or moving up and down.To ensure the precise installation posture and positioning accuracy of the arc-shaped baffle module 5 during adjustment, the dovetail guide rail structure possesses excellent load-bearing capacity and impact resistance, capable of withstanding continuous vibration and airflow reaction force during air knife operation. This ensures the overall stability of the side baffle 2 structure, thereby guaranteeing a constant relative position between the main baffle 51 and the strip edge. This prevents uneven airflow obstruction caused by bracket loosening or offset, further improving the uniformity and control accuracy of the edge coating thickness. The front end angle of the main baffle 51 in the arc-shaped baffle module 5 is 8°-12°, and its arc curvature radius matches the curvature of the strip edge transition zone. This outward tilt angle of the main baffle 51 effectively guides the high-speed airflow ejected by the air knife to smoothly adhere to the strip edge surface, reducing airflow obstruction. The separation and eddy current generation when the flow meets the edge of the strip steel inhibit the splashing of molten zinc by the airflow, preventing the formation of fly zinc or zinc accumulation. Simultaneously, the main baffle 51 is arc-shaped, with its radius of curvature matching the natural curvature of the strip steel edge transition zone. This allows the baffle to form a continuous, close-fitting airflow shielding surface near the strip steel edge, avoiding localized airflow acceleration or insufficient shielding caused by straight edges or rigid corners. The quick-change buckle structure 6 includes a U-shaped seat 61 mounted on the adjusting bracket 4, a pressure rod 62 hinged to the U-shaped seat 61, and a slot on the back of the main baffle 51. The end of the pressure rod 62 has a locking head that engages with the slot on the back of the main baffle 51. The pressure rod 62 is hinged to the U-shaped seat 61 by a pin, with elastic retaining rings at both ends of the pin for axial limiting to prevent the pin from falling off. This structure... When the main baffle 51 needs to be installed or replaced, simply push the main baffle 51 into the predetermined position so that the slot aligns with the clamping head at the end of the pressure rod 62, and then press down the pressure rod 62 to accurately insert the clamping head into the slot, thereby firmly fixing the main baffle 51 to the adjusting bracket 4. Conversely, when the main baffle 51 needs to be removed, simply lift the pressure rod 62 to disengage the clamping head from the slot, and the main baffle 51 can be easily removed. This not only ensures the stability of the main baffle 51 during operation, preventing it from shifting or loosening due to airflow impact, but also greatly facilitates maintenance and partial replacement operations, reduces downtime, and improves production efficiency. The elastic clamping part 7 is a U-shaped metal spring, with its two ends embedded in the limiting grooves on the sides of the main baffle 51 and the auxiliary guide plate 52, respectively. When the airflow impacts the main baffle 51 and the auxiliary guide vane 52, the elastic clamping member 7 can undergo slight elastic deformation according to the airflow pressure. This allows the auxiliary guide vane 52 to flexibly adjust its angle to adapt to changes in airflow, ensuring that the airflow is more evenly distributed in the strip edge area, reducing dead zones and local turbulence. This flexible connection not only enhances the overall structure's vibration resistance and stability, avoiding stress concentration problems caused by rigid connections, but also allows for easy and quick removal of the elastic clamping member 7 from the limiting groove during maintenance or replacement, further improving the maintainability and practicality of the device. One end of the adjusting screw 8 abuts against the side wall of the adjusting bracket 4, and the other end extends out of the base plate 3 and is equipped with a handwheel.The handwheel features a non-slip rubber coating, facilitating stable rotation and adjustment by operators in high-temperature and humid environments. The adjusting screw 8 is threadedly engaged with the base plate 3. This structure, by rotating the handwheel located at the outer end of the adjusting screw 8, drives the adjusting screw 8 to rotate within the threaded hole of the base plate 3, generating axial feed motion. Its front end gradually abuts against and pushes the adjusting bracket 4 to slide smoothly along the transverse guide rail assembly on the base plate 3, thereby achieving precise lateral movement of the adjusting bracket 4 and the arc-shaped baffle module 5 mounted on it.
[0016] Working principle: When using this continuous hot-dip galvanizing air knife edge baffle device, firstly, according to the width of the strip to be produced, rotate the handwheel at the outer end of the adjusting screw 8 so that the adjusting screw 8 rotates in the threaded hole of the base plate 3 and generates axial displacement, pushing the adjusting bracket 4 to slide along the dovetail guide rail 31 at the front end of the base plate 3 until it is located at the position corresponding to the edge of the strip. Then, according to the height and curvature characteristics of the strip edge, select an appropriate number of arc-shaped baffle modules 5 for configuration, align the slot on the back of the main baffle 51 with the end of the clamping head of the quick-change buckle structure 6 on the adjusting bracket 4, push the main baffle 51 into the installation position, and press down the clamping rod 62 so that its clamping head is engaged in the slot, completing the fixation of the main baffle 51 on the adjusting bracket 4. Next, insert the auxiliary guide plate 52 into one end of the U-shaped metal spring sheet, i.e., the elastic clamping member 7, through its side limiting groove, and simultaneously insert the other end of the elastic clamping member 7 into the main baffle. Within the limiting groove corresponding to the side of 51, the auxiliary guide plate 52 is connected to the main baffle plate 51. Repeating the above steps, multiple sets of arc-shaped baffle modules 5 are installed sequentially along the vertical direction on the adjusting bracket 4 to form a continuous edge shielding structure. After installation, the air knife body 1 is activated, and high-speed airflow is ejected from the air knife nozzle. The side baffle 2 is located at the edges of both sides of the strip steel. The outward-curving angle surface of the main baffle plate 51 faces the airflow direction. The auxiliary guide plate 52 is attached to the upper and lower sides of the main baffle plate 51. Under the continuous action of the airflow, the elastic clamping part 7 maintains the connection stability, and the relative positions of each component remain unchanged. When changing production specifications, the pressure rod 62 is lifted to release the lock, and the main baffle plate 51 and auxiliary guide plate 52 can be disassembled one by one. At the same time, the adjusting screw 8 is readjusted to adjust the lateral position of the adjusting bracket 4. Then, the corresponding number of arc-shaped baffle modules 5 are reinstalled according to the new strip steel parameters, thereby completing a series of tasks.
[0017] Although the present invention 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 invention should be included within the protection scope of the present invention.
Claims
1. A continuous hot-dip galvanizing air knife edge baffle device, comprising an air knife body (1), wherein edge baffles (2) are provided at both ends of the air knife body (1), characterized in that: The side baffle (2) includes a base plate (3) fixedly installed at the end of the air knife body (1). The front end of the base plate (3) is slidably connected to an adjustment bracket (4) through a transverse guide rail assembly. Multiple sets of independently detachable arc-shaped baffle modules (5) are installed side by side on the adjustment bracket (4) along the vertical direction. Each set of arc-shaped baffle modules (5) consists of a main baffle (51) with an outward angle at the front end and auxiliary guide plates (52) located on its upper and lower sides. The main baffle (51) is fixed to the adjustment bracket (4) through a quick-change buckle structure (6). The auxiliary guide plate (52) is connected to the side of the main baffle (51) through an elastic clamp (7). The transverse position of the adjustment bracket (4) is driven by an adjustment screw (8) set on the base plate (3).
2. The continuous hot-dip galvanizing air knife edge baffle device according to claim 1, characterized in that: The transverse guide rail assembly includes two parallel dovetail guide rails (31) disposed on the front end face of the substrate (3), and the back of the adjustment bracket (4) is provided with a sliding groove that slides in cooperation with the dovetail guide rails (31).
3. The continuous hot-dip galvanizing air knife edge baffle device according to claim 1, characterized in that: The main baffle (51) in the arc-shaped baffle module (5) has a front end angle of 8°-12°, and its arc curvature radius is adapted to the curvature of the strip edge transition zone.
4. The continuous hot-dip galvanizing air knife edge baffle device according to claim 1, characterized in that: The quick-change buckle structure (6) includes a U-shaped seat (61) set on the adjustment bracket (4), a pressure rod (62) hinged to the U-shaped seat (61), and a slot on the back of the main baffle (51). The end of the pressure rod (62) is provided with a clip head that cooperates with the slot on the back of the main baffle (51).
5. The continuous hot-dip galvanizing air knife edge baffle device according to claim 1, characterized in that: The elastic clamping member (7) is a U-shaped metal spring sheet, with its two ends embedded in the limiting grooves on the sides of the main baffle (51) and the auxiliary guide plate (52), respectively.
6. The continuous hot-dip galvanizing air knife edge baffle device according to claim 1, characterized in that: One end of the adjusting screw (8) abuts against the side wall of the adjusting bracket (4), and the other end extends out of the base plate (3) and is equipped with a handwheel. The adjusting screw (8) is threadedly engaged with the base plate (3).