Air knife lip cleaning device

Abstract

The application discloses a gas-knife lip cleaning device, which solves the technical problem of low cleaning efficiency of the prior art. The gas-knife lip cleaning device comprises a scraper, an operating rod and a locking piece. The scraper comprises an angle setting blade and a handle, the included angle of the blade and the handle is an acute angle, the blade has oppositely arranged first and second ends, the second end of the blade is connected with the handle, the cross section of the blade gradually decreases from the first end to the second end, and the handle is provided with a connecting hole. The operating rod comprises a connecting part and an operating part, the connecting part is provided with a mounting hole matched with the connecting hole. The locking piece is operable to extend into the connecting hole of the handle and the mounting hole of the operating rod, so as to connect and fix the operating rod and the handle. The gas-knife lip cleaning device can quickly and effectively deal with the gas-knife strip defect caused by the gas-knife residue and blockage, reduces the product quality degradation, and improves the continuous production stability.

Description

Technical Field

[0001] This application belongs to the field of cold-rolled hot-dip galvanizing technology, specifically relating to an air knife lip cleaning device. Background Technology

[0002] In hot-dip galvanizing production, air knives control the zinc layer thickness through high-speed airflow, and the cleanliness of their blade lips directly affects the uniformity of the coating. However, zinc splashes or foreign matter adhesion during production can easily clog the blade lips, creating localized areas of airflow obstruction and causing "air knife streaks"—a defect that becomes noticeable after coating, leading to product downgrading or even scrapping. Traditional cleaning methods often involve manual scraping or machine shutdown for disassembly and cleaning. Shutting down for disassembly and cleaning is inefficient and unsuitable for high-speed continuous production, and downtime can also cause losses: frequent disassembly of the air knife leads to production line interruptions, affecting capacity. Summary of the Invention

[0003] To address the current technical problem of low downtime cleaning efficiency, this application provides an air knife blade cleaning device.

[0004] In a first aspect of this application, a pneumatic knife blade cleaning device is provided, comprising:

[0005] A scraper includes an angled blade and a handle, wherein the included angle between the blade and the handle is an acute angle, the blade has a first end and a second end disposed opposite to each other, the second end of the blade is connected to the handle, the cross-section of the blade gradually decreases from the first end to the second end, and the handle is provided with a connecting hole;

[0006] The operating lever includes a connecting part and an operating part, wherein the connecting part is provided with a mounting hole that matches the connecting hole;

[0007] A locking element is operably inserted into the connection hole of the tool holder and the mounting hole of the operating rod to connect and fix the operating rod to the tool holder.

[0008] In some embodiments, the included angle between the blade and the handle is 80° to 85°.

[0009] In some embodiments, the blade and the handle are integrally formed.

[0010] In some embodiments, the first end of the blade is the cutting edge, and the second end of the blade is the blade body;

[0011] The hardness of the first end of the blade is greater than the hardness of the second end.

[0012] In some embodiments, the first end of the blade is arc-shaped;

[0013] The cross-section of the second end of the blade increases uniformly;

[0014] The first end of the blade transitions to the second end in a circular arc.

[0015] In some embodiments, the thickness of the blade is less than the gap between the air knife blade lips;

[0016] The thickness of the blade is 0.6mm to 0.8mm.

[0017] In some embodiments, the operating lever is parallel to the tool holder;

[0018] The control lever is also equipped with an anti-slip part.

[0019] In some embodiments, the locking element includes a bolt and a nut, the bolt being operable to extend into the connection hole of the knife handle and the mounting hole of the operating rod, and being connected and fixed by the nut.

[0020] In some embodiments, at least two sets of the connecting holes and the mounting holes are provided, and the number of locking members is equal to the number of the connecting holes and the mounting holes.

[0021] In some embodiments, the connecting portion and the operating portion are integrally formed;

[0022] The connecting part is provided with an opening, and a limiting part is also provided at the connection between the connecting part and the operating part;

[0023] The handle is operable to extend into the opening of the connecting part and is limited by the limiting part.

[0024] A pneumatic knife lip cleaning device according to one or more embodiments of this application includes a scraper, an operating lever, and a locking member. The scraper includes an angled blade and a handle, with the included angle between the blade and the handle being an acute angle. The blade has a first end and a second end that are opposite to each other, and the second end of the blade is connected to the handle. The cross-section of the blade gradually decreases from the first end to the second end. The handle has a connecting hole. The operating lever includes a connecting part and an operating part, and the connecting part has a mounting hole that matches the connecting hole. The locking member is operablely inserted into the connecting hole of the handle and the mounting hole of the operating lever to connect and fix the operating lever to the handle. The pneumatic knife lip cleaning device of this application can quickly and effectively handle pneumatic knife streaks caused by slag adhesion and blockage, reduce product quality degradation, and improve the stability of continuous production. Attached Figure Description

[0025] Figure 1 A schematic diagram of the air knife lip cleaning device in one or more embodiments of this application is shown.

[0026] Figure 2 It shows Figure 1A schematic diagram of the scraper's structure.

[0027] Figure 3 A schematic diagram of a simplified blade lip is shown.

[0028] Explanation of reference numerals in the attached drawings: 100-Air knife blade cleaning device, 110-Scraper, 111-Blade edge, 1111-Blade mouth, 1112-Blade body, 112-Handle, 1121-Connecting hole, 120-Operating lever, 121-Connecting part, 122-Operating part, 130-Locking part, 200-Upper blade lip, 201-Foreign matter on the end face of the upper blade lip, 202-Foreign matter in the gap between the blade lips, 210-Lower blade lip, 211-Foreign matter on the end face of the lower blade lip, 212-Foreign matter adhering to the bottom of the blade lip. Detailed Implementation

[0029] To enable those skilled in the art to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0030] Please see Figure 1 and Figure 2 According to a first aspect of this application, an air knife blade cleaning device 100 is provided, including a scraper 110, an operating lever 120, and a locking member 130. The scraper 110 includes an angled blade 111 and a handle 112, with the included angle between the blade 111 and the handle 112 being an acute angle. The blade 111 has a first end and a second end that are arranged opposite to each other. The second end of the blade 111 is connected to the handle 112. The cross-section of the blade 111 gradually decreases from the first end to the second end. The handle 112 is provided with a connecting hole 1121. The operating lever 120 includes a connecting part 121 and an operating part 122. The connecting part 121 is provided with a mounting hole that matches the connecting hole 1121. The locking member 130 is operably inserted into the connecting hole 1121 of the handle 112 and the mounting hole of the operating lever 120 to connect and fix the operating lever 120 to the handle 112.

[0031] like Figure 3As shown in the diagram, this is a simplified blade lip. Airflow is ejected from the center, scraping away excess zinc from the strip surface. Different airflow pressures achieve different coating effects. The numbers represent locations where slag easily adheres to the blade lip. Specifically: Foreign matter adhering to the end face of the upper blade lip 200 affects the airflow replenishment above, causing the airflow ejected from the blade lip to diverge upwards, weakening the zinc scraping ability. Zinc adhesion to the upper blade lip 200 is often accompanied by zinc adhesion within the blade lip gap, affecting airflow and leading to thickened coating and air knife streaks. Foreign matter stuck within the blade lip gap weakens airflow at this location, resulting in thickened coating and air knife streaks. Foreign matter adhering to the end face of the lower blade lip 210 causes the airflow ejected from the blade lip to diverge upwards, weakening the zinc scraping ability and causing localized thickening of the coating on the strip surface, resulting in streaks. Foreign matter 212 adhering to the bottom of the blade lip affects the airflow replenishment below the lower blade lip 210, causing the airflow ejected from the air knife to diverge downwards, weakening the zinc scraping ability and causing localized thickening of the coating on the strip surface, resulting in streaks.

[0032] The angle between the blade 111 and the handle 112 is an acute angle. The air knife angle is generally between -1° and 0°, meaning the angle between the air knife nozzle and the strip surface is approximately perpendicular. When the angle between the blade 111 and the handle 112 is acute, it can more easily cut into the slag-adhering gaps in the blade lip during scraping. Due to the shape of the acute angle, it generates greater local pressure on the material when the same force is applied. It can precisely cut into slag-adhering gaps, achieving stable force and quickly processing the slag, while the blade 111 may cause scratches.

[0033] From the first end to the second end, the cross-section of the blade 111 gradually decreases. Specifically, the first end of the blade 111 is used to scrape away the residue on the blade lip; its smaller cross-section allows it to more easily cut into the gaps in the residue during scraping. The second end of the blade 111 has a larger cross-sectional area, which is used to better collect the residue, thus catching more residue and improving scraping efficiency.

[0034] The connecting part 121 of the operating lever 120 is connected to the tool holder 112 through the locking member 130, which makes it convenient to select the appropriate size of the operating lever 120, supports quick replacement, and adapts to different working conditions.

[0035] Therefore, the air knife lip cleaning device 100 of this application can quickly and effectively deal with air knife streaks caused by air knife adhesion and blockage, reduce product quality degradation, and improve the stability of continuous production.

[0036] In some embodiments, the angle between the blade 111 and the handle 112 is 80° to 85°, and the angle between the blade 111 and the handle 112 can be 80°, 82°, 84° or 85°. This ensures that the blade 111 accurately cuts into the slag gaps, achieving stable force and quickly processing the slag, while avoiding scratches on the blade 111; the blade 111 cutting into the slag gaps allows it to fit tightly against the upper part of the air knife lip, better cleaning the slag inside the air knife lip.

[0037] In some embodiments, the blade 111 and the handle 112 are integrally formed. The transition between the blade 111 and the handle 112 is natural and smooth. In terms of actual use, the integrally formed blade 111 and handle 112 can better distribute pressure and withstand impact, making it more stable and reliable when cutting various materials.

[0038] In some embodiments, the first end of the blade 111 is the cutting edge 1111, and the second end of the blade 111 is the blade body 1112; the hardness of the first end of the blade 111 is greater than the hardness of the second end. The cutting edge 1111 can be made of HRC55, and the blade body 1112 can be made of HRC40-45. HRC is Rockwell hardness, a standard for measuring the hardness of materials, mainly used to represent the hardness of metallic materials. HRC55 has a high hardness, belonging to the hard range, and the surface of the material has a strong resistance to deformation, capable of withstanding large external forces without producing significant plastic deformation; HRC40-45 has a relatively low hardness, the material's hardness is at a medium level, its surface resistance to deformation is weaker than that of HRC55 materials, but stronger than materials with even lower hardness. The hardness of the cutting edge 1111 being greater than the hardness of the blade body 1112 can achieve "hard scraping and soft cleaning," thereby reducing the damage rate of the blade body 1112 to below 0.2%.

[0039] In some embodiments, the first end of the blade 111 is arc-shaped; the cross-section of the second end of the blade 111 increases uniformly; and the transition from the first end to the second end of the blade 111 is an arc. This is mainly to ensure that the scraper 110 blade fits snugly against the upper part of the blade lip, thus better cleaning the residue inside the blade lip.

[0040] In some embodiments, the thickness of the blade 111 is less than the gap between the air knife lips; the air knife lip gap refers to the distance between the upper lip 200 and the lower lip 210 of the air knife, and the air knife lip gap is usually calibrated to 0.9mm. The thickness of the blade 111 is less than the gap between the air knife lips to ensure that the blade 111 can fill the gap between the blade beams as much as possible during the cleaning process, so that foreign objects at the lip can be effectively cleaned, while avoiding the blade being too thick, which would cause jamming during the lateral movement, and ensuring that the blade 111 moves smoothly in the lateral direction.

[0041] In some embodiments, the thickness of the blade 111 is 0.6mm to 0.8mm. The thickness of the blade 111 can be 0.6mm, 0.7mm, or 0.8mm, preferably 0.7mm. This ensures that the blade 111 can fill the gap between the blade beams as much as possible during the cleaning process, effectively removing foreign objects from the lip, while avoiding jamming during lateral movement due to excessive blade thickness, thus ensuring smooth lateral movement of the blade 111.

[0042] like Figure 1 As shown, in some embodiments, the operating lever 120 and the handle 112 are parallel to each other; that is, the angle between the operating lever 120 and the blade 111 is also an acute angle, ranging from 80° to 85°, specifically 80°, 83°, or 85°. The operating lever 120 can maintain a nearly vertical position while moving laterally, thus ensuring smooth movement without jamming. In some embodiments, the surface of the operating lever 120 is anodized. After anodizing, the corrosion resistance of the operating lever 120 is significantly enhanced, enabling it to withstand corrosion in harsh environments and extending its service life. The surface hardness and wear resistance are also greatly improved, reducing wear caused by friction during use and maintaining the accuracy and performance of the operating lever 120. This ensures operational flexibility.

[0043] In some embodiments, the operating lever 120 can be made of 6061-T6 aluminum alloy tubing with dimensions of Φ5mm × 800mm, i.e., the outer diameter of the operating lever 120 is 5mm and the length is 800mm. 6061-T6 aluminum alloy has good strength and toughness, weighs approximately 280g, and meets the flexibility requirements for one-handed operation.

[0044] In other embodiments, the operating lever 120 is also provided with an anti-slip part. The protective part can be a high-temperature resistant silicone grip with anti-slip texture, which can withstand temperatures up to 250°C, ensuring operational safety in high-temperature environments.

[0045] In some embodiments, the locking member 130 includes a bolt and a nut. The bolt is operable and extends into the connection hole 1121 of the tool holder 112 and the mounting hole of the operating rod 120, and is fixed by the nut. In some embodiments, the bolt can be an M5 high-strength anti-loosening bolt, which supports quick replacement and adapts to different working conditions.

[0046] In some embodiments, at least two sets of connecting holes 1121 and mounting holes are provided, and the number of locking members 130 is equal to the number of connecting holes 1121 and mounting holes. Multiple sets of connecting holes 1121 can distribute the force on the connecting part 121 more evenly on multiple holes, avoiding excessive load on a single connection point, thereby reducing the risk of connection loosening or breakage due to excessive local stress and improving the overall stability of the connection.

[0047] In some embodiments, the connecting part 121 and the operating part 122 are integrally formed to ensure the stability of the overall structure of the operating lever 120.

[0048] In other embodiments, the connecting portion 121 has an opening, and a limiting portion is also provided at the connection between the connecting portion 121 and the operating portion 122; the tool holder 112 is operably inserted into the opening of the connecting portion 121 and limited by the limiting portion. The connecting plate extends into the connecting rod, increasing the contact area between them. After bolt connection, the connecting plate and the connecting rod are not only subject to the clamping force of the bolts, but also to the wrapping and restraining effect of the connecting rod on the connecting plate, making the connection more stable and able to withstand greater loads and stronger vibrations. Simultaneously, the limiting portion can limit the tool holder 112, ensuring convenient detachable connection.

[0049] Applying the air knife lip cleaning device 100 of this application to a cold-rolled galvanizing line as an example, with a production line speed of 120 m / min and an air knife pressure of 3.5 kPa, when detecting air knife streak defects, the operator uses the air knife lip cleaning device 100 of this application to perform online cleaning. The specific operating steps are as follows: align the blade 111 with the slag-adhering area, and advance it at a uniform speed along the length of the air knife using the operating rod 120.

[0050] The zinc slag can be peeled off by the shearing force generated by the angle between the blade 111 and the handle 112; after cleaning, the uniformity of the air knife airflow is restored to within ±2%, and the streak defect elimination rate is 100%.

[0051] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0052] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0053] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0054] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0055] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A device for cleaning the blade lip of an air knife, characterized in that, include: A scraper includes an angled blade and a handle, wherein the included angle between the blade and the handle is an acute angle, the blade has a first end and a second end disposed opposite to each other, the second end of the blade is connected to the handle, the cross-section of the blade gradually decreases from the first end to the second end, and the handle is provided with a connecting hole; The operating lever includes a connecting part and an operating part, wherein the connecting part is provided with a mounting hole that matches the connecting hole; A locking element is operably inserted into the connection hole of the tool holder and the mounting hole of the operating rod to connect and fix the operating rod to the tool holder.

2. The air knife blade cleaning device according to claim 1, characterized in that, The included angle between the blade and the handle is 80° to 85°.

3. The air knife blade cleaning device according to claim 1, characterized in that, The blade and the handle are integrally formed.

4. The air knife blade cleaning device according to any one of claims 1-3, characterized in that, The first end of the blade is the cutting edge, and the second end of the blade is the blade body; The hardness of the first end of the blade is greater than the hardness of the second end.

5. The air knife blade cleaning device according to claim 4, characterized in that, The first end of the blade is arc-shaped; The cross-section of the second end of the blade increases uniformly; The first end of the blade transitions to the second end in a circular arc.

6. The air knife blade cleaning device according to any one of claims 1-3, characterized in that, The thickness of the blade is less than the gap between the air knife blade lips; The thickness of the blade is 0.6mm to 0.8mm.

7. The air knife blade cleaning device according to any one of claims 1-3, characterized in that, The operating lever is parallel to the tool holder; The control lever is also equipped with an anti-slip part.

8. The air knife blade cleaning device according to any one of claims 1-3, characterized in that, The locking element includes a bolt and a nut. The bolt is operable to extend into the connecting hole of the knife handle and the mounting hole of the operating rod, and is connected and fixed by the nut.

9. The air knife blade cleaning device according to any one of claims 1-3, characterized in that, The connecting holes and the mounting holes are provided in at least two sets, and the number of locking members is equal to the number of connecting holes and mounting holes.

10. The air knife blade cleaning device according to any one of claims 1-3, characterized in that, The connecting part and the operating part are integrally formed; The connecting part is provided with an opening, and a limiting part is also provided at the connection between the connecting part and the operating part; The handle is operable to extend into the opening of the connecting part and is limited by the limiting part.

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