Method, device and electronic equipment for controlling c-curl defects of hot-dip galvanized steel strip

Abstract

The application discloses a kind of method, device and electronic equipment for controlling hot galvanizing strip steel C warpage defect, belong to the field of cold-rolled strip steel production, including air knife rack and two moving seats set on air knife rack, moving seat is slidably provided with correction block, the side of two correction blocks close to each other is all set with recess, the opposite inner side of recess is all set with mounting groove, mounting groove is slidably provided with mounting frame, the side between mounting frame close to each other is rotatably installed with correction wheel, the inner wall of mounting groove is fixed with spring one, the end of spring one close to correction wheel is fixed on the side wall of mounting frame, moving seat is provided with the drive assembly for driving correction block moves along the length direction of moving seat.This application has the effect of improving strip steel quality.

Description

Technical Field

[0001] This invention relates to the field of cold-rolled strip steel production, and in particular to a method, apparatus, and electronic equipment for controlling C-warping defects in hot-dip galvanized strip steel. Background Technology

[0002] Hot-dip galvanizing, also known as hot-dip zinc plating, is an effective method of metal corrosion protection. It is mainly used on metal structures in various industries and is a process technology that involves immersing metals such as steel, stainless steel, and cast iron into molten liquid metal or alloy to obtain a coating.

[0003] During the hot-dip galvanizing process, the strip steel is affected by various factors, and when it enters the air knife after passing through the zinc pot, it will exhibit a lateral warping deformation, referred to as C-warping. Due to the presence of C-warping, the distance between the middle of the strip steel and the air knife nozzle is greater than that between the edge and the air knife nozzle. The farther the nozzle is from the strip steel, the lower the airflow pressure, the smaller the impulse, and the greater the thickness of the zinc layer. Ultimately, this results in a zinc layer thickness distribution on the upper surface of the strip steel that is "thicker in the middle and thinner at the edges," causing uneven galvanized layer thickness and thus reducing the quality of the strip steel. Summary of the Invention

[0004] To address the issue of uneven galvanized layer thickness and reduced strip quality, this application provides a method, apparatus, and electronic device for controlling C-curving defects in hot-dip galvanized strip.

[0005] This application provides a method, apparatus, and electronic equipment for controlling C-curve defects in hot-dip galvanized strip steel, which adopts the following technical solution:

[0006] A device for controlling C-curve defects in hot-dip galvanized strip steel includes an air knife frame and two movable seats mounted on the air knife frame. A straightening block is slidably mounted on each movable seat. Grooves are formed on the sides of the two straightening blocks that are close to each other. Mounting grooves are formed on the opposite inner sides of the grooves. Mounting frames are slidably mounted within the mounting grooves. A straightening wheel is rotatably mounted between the close sides of the mounting frames. A spring is fixed to the inner wall of the mounting groove, with one end of the spring near the straightening wheel fixed to the side wall of the mounting frame. A driving assembly is provided on each movable seat for driving the straightening blocks to move along the length of the movable seat.

[0007] By adopting the above technical solution, the galvanized strip passes through the air knife machine frame, and the moving seat moves toward the strip, causing the moving seat to drive the straightening block to move toward the strip, so that the edge of the strip is inserted between the two straightening wheels. Under the elastic force of the spring, the two straightening wheels move toward each other, clamping the edge of the strip. Then, the driving component moves the straightening block in the opposite direction of the strip bending direction, so that the straightening wheels apply force to the edge of the strip to achieve straightening.

[0008] Preferably, the top surface of the movable seat is fixed with a slide rail, the bottom surface of the correcting block is provided with a slide groove, the correcting block is slidably disposed on the slide rail through the slide groove, the top surface of the slide rail is provided with a moving groove, the inner top surface of the slide groove is fixed with a moving block, the moving block is inserted into the slide groove, the driving assembly includes a screw rotatably mounted between the opposite inner surfaces of the moving groove, the screw passes through the moving block, the screw is threadedly connected to the moving block, one end of the screw passes through the side wall of the slide rail, and the end of the screw away from the slide rail is fixed with a rotating block.

[0009] By adopting the above technical solution, when the edge of the strip is inserted between two straightening wheels, by rotating the rotating block, the rotating block drives the screw to rotate, the screw drives the moving block to move, the moving block drives the straightening block to move, and the straightening block drives the straightening wheel to move, so that the straightening wheel pushes the strip in the opposite direction of the bending direction, thereby achieving the straightening of the strip.

[0010] Preferably, the top surface of the air knife frame is provided with wedge-shaped grooves on both sides, the bottom surface of the movable seat is fixed with wedge-shaped blocks on both sides, the two wedge-shaped blocks are slidably disposed in the two wedge-shaped grooves respectively, and the movable seat is provided with a fixing member for fixed connection with the air knife frame.

[0011] By adopting the above technical solution, the movable seat is slidably set in the wedge groove through the wedge block. When galvanizing strips of different widths, it is convenient to move the movable seat along the length of the air knife machine frame, which facilitates the straightening of strips of different widths.

[0012] Preferably, threaded holes are provided on both sides of the top surface of the movable base, and the fixing member includes a bolt inserted into the threaded hole. The bolt is threaded to the inner wall of the threaded hole, and the bottom end of the bolt abuts against the top surface of the air knife frame.

[0013] By adopting the above technical solution, when straightening strips of different widths, after adjusting the position of the moving seat, the bolt is inserted into the through hole, and the bolt is rotated so that the bottom end of the bolt abuts against the top surface of the air knife machine frame, thereby fixing the moving seat on the air knife machine frame.

[0014] Preferably, the air knife frame has through slots on both sides, a rotating column is rotatably installed in the through slots, two recesses are opened on the outer circumference of the rotating column, an air knife is placed in the recesses, a fixing component for fixing the rotating column is provided on the air knife frame, and an air supply component for supplying air into the air knife is provided on the air knife frame.

[0015] By adopting the above technical solution, two air knives are installed on the rotating column. Gas is delivered to the air knives through the air supply assembly, so that the air knives blow off the excess zinc material on the surface of the strip. When the air knives are damaged during use, the rotating column can be rotated to turn the other air knives toward the strip, so that when the damaged air knives are replaced, the other air knives can continue to blow air onto the surface of the strip.

[0016] Preferably, the gas delivery assembly includes an air pump mounted on the air knife frame, a three-way pipe connected to the air outlet of the air pump, an air chamber formed inside the rotating column, an air pipe connector one fixed on the inner wall of the settling tank, the air pipe connector one communicating with the air chamber, an air pipe connector two connected to one end of the air knife, the air pipe connector one connecting with the air pipe connector two, a through hole formed on the inner side of the air chamber away from the air knife, and the other two ports of the three-way pipe respectively inserted into the two through holes, the three-way pipe being rotatably connected to the rotating column through the through holes.

[0017] By adopting the above technical solution, the air pump is started, and the air pump delivers gas to the air chamber inside the rotating column through the three-way pipe. Then, the gas is delivered to the air knife through air pipe connector one and air pipe connector two, so that the air knife blows air onto the surface of the strip steel.

[0018] Preferably, the air knife frame has two circular holes on the side away from the air pump. The circular holes are connected to the through groove. A rotating shaft is inserted into the circular holes. One end of the rotating shaft is fixedly connected to one end of the rotating column. The outer circumferential surface of the rotating column has multiple slots. The inner circumferential surface of the circular holes has a sliding groove. The fixing assembly includes a limiting rod that is slidably disposed vertically in the sliding groove. The top end of the limiting rod can be inserted into the slot. A second spring is fixed to the bottom end of the limiting rod. The top end of the second spring is fixed to the bottom surface of the limiting rod.

[0019] By adopting the above technical solution, when the rotating column is rotated to replace the air knife, the limiting rod moves upward under the elastic force of the second spring, so that the top end of the limiting rod is inserted into the slot, thereby fixing the rotating shaft to the air knife frame.

[0020] Preferably, the inner side of the sliding groove is provided with an opening, and a movable rod is fixed to the side of the limiting rod, with the end of the movable rod away from the limiting rod passing through the opening.

[0021] By adopting the above technical solution, when it is necessary to rotate the rotating column, the moving rod is moved downward, and the moving rod drives the limiting rod to move downward, so that the top of the limiting rod disengages from the slot, thereby facilitating the rotation of the rotating column.

[0022] A method for controlling C-warping defects in hot-dip galvanized strip steel includes the following steps:

[0023] S1: Pass the strip steel, which has been galvanized in a zinc pot, through the air knife machine frame;

[0024] S2: Before the strip enters the air knife machine frame, acquire the characteristic data of the strip, including the process data and strip shape data of the hot-dip galvanizing production line.

[0025] S3: Based on the characteristic data of the strip, when it is determined that the strip has C-warping, the strip that has C-warping due to heat is straightened by the straightening wheel on the air knife stand;

[0026] S4: After the strip is straightened, the excess zinc material on the strip is blown off by the air knife on the air knife machine frame.

[0027] By adopting the above technical solution, after the strip steel is galvanized in the zinc pot, the conveying end of the strip steel passes through the air knife frame. The characteristic data confirms that the strip steel has C-curve. Then, the strip steel is corrected by the straightening device on the air knife frame. After correction, the excess zinc material on the strip steel is blown off by the air knife on the air knife frame. This reduces the possibility that the strip steel will have an uneven zinc coating thickness on the surface due to C-curve after galvanizing, which would reduce the quality of the strip steel.

[0028] An electronic device for controlling C-warping defects in hot-dip galvanized strip steel includes a memory, a processor, and a computer program stored in the memory and executable on the processor.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. The galvanized strip passes through the air knife machine frame. The moving seat is moved towards the strip, causing the straightening block to move towards the strip. The edge of the strip is inserted between the two straightening rollers. Under the elastic force of spring one, the two straightening rollers move towards each other, clamping the edge of the strip. Then, the drive assembly moves the straightening block in the opposite direction of the strip's bending direction, so that the straightening rollers apply force to the edge of the strip to achieve straightening.

[0031] 2. When the strip is inserted between two straightening rollers at its edge, rotating the rotating block drives the screw to rotate, the screw drives the moving block to move, the moving block drives the straightening block to move, and the straightening block drives the straightening roller to move, so that the straightening roller pushes the strip in the opposite direction of the bending direction, thereby achieving the straightening of the strip.

[0032] 3. Two air knives are installed on the rotating column. Gas is delivered to the air knives through the air supply assembly, so that the air knives blow off the excess zinc material on the surface of the strip. When an air knife is damaged during use, the rotating column can be rotated to turn the other air knife toward the strip, so that when the damaged air knife is replaced, the other air knife can continue to blow air onto the surface of the strip. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of the device for controlling C-curving defects in hot-dip galvanized strip steel according to an embodiment of this application.

[0034] Figure 2 This is a cross-sectional view of the correction block in an embodiment of this application.

[0035] Figure 3 This is a schematic diagram of the air pump in an embodiment of this application.

[0036] Figure 4 This is a schematic diagram of the rotating column in an embodiment of this application.

[0037] Figure 5 This is a cross-sectional view of the air knife frame in an embodiment of this application.

[0038] Figure 6 yes Figure 5 Enlarged diagram of point A in the middle.

[0039] Figure 7 This is a schematic diagram of the electronic device structure for controlling C-warping defects in hot-dip galvanized strip steel in an embodiment of this application.

[0040] Reference numerals: 1. Air knife frame; 11. Moving base; 12. Wedge block; 13. Wedge groove; 14. Threaded hole; 15. Bolt; 2. Straightening block; 21. Groove; 22. Mounting groove; 23. Mounting bracket; 24. Guide block; 25. Guide groove; 26. Straightening wheel; 27. Spring 1; 3. Slide rail; 31. Slide groove; 32. Moving block; 33. Screw; 34. Rotating block; 35. Moving groove; 4. 41. Through slot; 42. Rotating column; 43. Settling tank; 44. Air knife; 45. Air chamber; 46. Air pipe connector one; 47. Air pipe connector two; 5. Valve; 68. Air pump; 59. T-connector; 60. Through hole; 61. Round hole; 62. Rotating shaft; 63. Drive block; 64. Slot; 65. Sliding groove; 66. Limiting rod; 67. Through port; 68. Moving rod; 7. Memory; 71. Processor. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0042] This application discloses a method, apparatus, and electronic device for controlling C-warping defects in hot-dip galvanized strip steel.

[0043] Reference Figure 1 A device for controlling C-warping defects in hot-dip galvanized strip steel includes an air knife frame 1 and two movable seats 11 mounted on the air knife frame 1.

[0044] Reference Figure 1 and Figure 2 Each of the two movable seats 11 has a straightening block 2 above it. The sides of the two straightening blocks 2 that are close to each other have grooves 21 that penetrate vertically through the straightening blocks 2. The inner sides of the grooves 21 each have mounting slots 22. A mounting bracket 23 is slidably mounted within the mounting slot 22, and a straightening wheel 26 is rotatably mounted between the inner sides of the mounting bracket 23. Two springs 27 are fixed to the side wall of the mounting bracket 23, with the end of each spring 27 away from the mounting bracket 23 fixed to the inner side wall of the mounting slot 22. Guide blocks 24 are fixed to both sides of the mounting bracket 23, and guide slots 25 are formed on the inner sides of the mounting slots 22. The guide blocks 24 are slidably mounted within the guide slots 25.

[0045] Reference Figure 1 and Figure 2 A slide rail 3 is fixed to the top surface of the movable base 11, and a groove 31 is provided on the bottom surface of the straightening block 2, extending through both sides of the straightening block 2. The slide rail 3 passes through the groove 31 and is slidably connected to the straightening block 2 via the groove 31. A moving groove 35 is provided on the top surface of the slide rail 3, and a moving block 32 is fixed to the inner top surface of the groove 31, inserted into the moving groove 35. A screw 33 is rotatably mounted on the opposite inner surface of the moving groove 35, passing through the moving block 32 and threadedly connected to it. One end of the screw 33 passes through the side wall of the slide rail 3, and a rotating block 34 is fixed to the end of the screw 33 away from the slide rail 3.

[0046] After the strip steel is galvanized in the zinc pot, the conveying end of the strip steel passes through the air knife frame 1, so that the edge of the strip steel passes between two straightening rollers 26. Under the elastic force of spring 27, the straightening rollers 26 move towards the strip steel, so that the two straightening rollers 26 clamp the strip steel. Then, the rotating block 34 is rotated, which drives the screw 33 to rotate. The screw 33 drives the moving block 32 to move, so that the moving block 32 drives the straightening block 2 to move in the opposite direction of the bending direction of the strip steel. The straightening block 2 drives the straightening rollers 26 to move in the opposite direction of the bending direction of the strip steel, so that the straightening rollers 26 apply force to straighten the edge of the strip steel.

[0047] Reference Figure 1 and Figure 2 Two wedge-shaped blocks 12 are fixed on both sides of the bottom surface of the two movable seats 11, and wedge-shaped grooves 13 are opened on both sides of the top surface of the air knife frame 1, with the wedge-shaped blocks 12 slidably disposed in the wedge-shaped grooves 13. Two threaded holes 14 are opened on both sides of the top surface of the movable seats 11, and the threaded holes 14 penetrate the movable seats 11 vertically. Bolts 15 are inserted into the threaded holes 14, and the bolts 15 are threadedly connected to the inner wall of the threaded holes 14, with the bottom end of the bolts 15 abutting against the top surface of the air knife frame 1.

[0048] The movable seat 11 is slidably set on the air knife frame 1. When straightening strips of different widths, the movable seat 11 is moved along the length of the air knife frame 1. When the position of the movable seat 11 is adjusted, the bolt 15 is rotated to move the bolt 15 downward. The bolt 15 is then rotated until the bottom end of the bolt 15 abuts against the top surface of the air knife frame 1, thereby fixing the movable seat 11 on the air knife frame 1. This makes it easier for the straightening wheel 26 to straighten strips of different widths.

[0049] Reference Figure 3 and Figure 4 The air knife frame 1 has through slots 4 on both sides. A rotating column 41 is rotatably mounted on the opposite inner side of each through slot 4. Two recessed grooves 42 are formed on the outer circumference of the rotating column 41, symmetrically arranged along its central axis. An air knife 43 is installed in each of the two recessed grooves 42, and is fixedly connected to the rotating column 41 by screws. An air chamber 44 is formed inside the rotating column 41. An air pipe connector 45 is fixed to the inner wall of each recessed groove 42, communicating with the air chamber 44. A valve 47 is fixed to the outer circumference of the air pipe connector 45. An air pipe connector 46 is fixed to one end of each air knife 43, connecting the air pipe connector 45 and the air pipe connector 46.

[0050] Reference Figure 3 and Figure 4 An air cavity 44 has a through hole 52 on its inner side away from the air knife 43, and the through hole 52 penetrates the side wall of the air knife frame 1. An air pump 5 is fixed on the side wall of the air knife frame 1, and a three-way pipe 51 is fixedly connected to the air outlet of the air pump 5. The other two ports of the three-way pipe 51 are respectively inserted into the two through holes 52, and the three-way pipe 51 is rotatably connected to the rotating column 41 through the through holes 52.

[0051] After the straightening wheel 26 straightens the strip, the air pump 5 is started. The air pump 5 delivers gas to the air chamber 44 through the three-way pipe 51. Then, the valve 47 on the air pipe connector 45 facing the strip is opened. The gas in the air chamber 44 is then delivered to the air knife 43 through the air pipe connector 45 and the air pipe connector 46. The gas is then blown onto the surface of the strip through the air outlet on the air knife 43, thereby blowing off the excess zinc material from the surface of the strip.

[0052] Reference Figure 1 Two circular holes 6 are provided on the side of the air knife frame 1 away from the air pump 5. The two circular holes 6 are respectively connected to two through slots 4. A rotating shaft 61 is inserted into the circular hole 6. The rotating shaft 61 is rotatably connected to the air knife frame 1 through the circular hole 6. One end of the rotating shaft 61 is fixedly connected to the end face of the rotating column 41. A drive block 62 is fixed to the end of the rotating shaft 61 away from the rotating column 41.

[0053] Reference Figure 5 and Figure 6The outer circumferential surface of the rotating shaft 61 has multiple slots 63, which are evenly spaced along the circumference of the rotating shaft 61. The inner circumferential surface of the circular hole 6 has a sliding groove 64, within which a limit rod 65 is vertically slidable. The top of the limit rod 65 is a pointed tip, which can be inserted into the slot 63. A second spring 66 is fixed to the bottom end of the limit rod 65, and the bottom end of the second spring 66 is fixed to the inner bottom surface of the sliding groove 64. An opening 67 is provided on the inner side of the sliding groove 64, penetrating the side of the air knife frame 1 away from the air pump 5. A moving rod 68 is fixed to the side of the limit rod 65, with one end of the moving rod 68 away from the limit rod 65 passing through the opening 67.

[0054] When the air knife 43 is damaged during use, the moving rod 68 is moved downward, causing the moving rod 68 to drive the limiting rod 65 downward, so that the top of the limiting rod 65 disengages from the slot 63. Then, the drive block 62 is rotated, causing the drive block 62 to drive the rotating shaft 61 to rotate, and the rotating shaft 61 to drive the rotating column 41 to rotate, so that the other air knife 43 rotates towards the strip steel, thus facilitating the replacement of the damaged air knife 43 while the other air knife 43 continues to blow off the excess zinc material from the surface of the strip steel.

[0055] The implementation principle of the device for controlling C-curve defects in hot-dip galvanized strip steel according to an embodiment of this application is as follows: When the galvanized strip steel passes through the air knife frame 1, the movable seat 11 is moved towards the strip steel, so that the edge of the strip steel passes through two straightening wheels 26. Under the elastic force of spring 27, the two straightening wheels 26 move towards each other, clamping the strip steel. Then, the rotating block 34 is rotated, which drives the screw 33 to rotate. The screw 33 drives the movable block 32 to move in the opposite direction away from the bending direction of the strip steel. The movable block 32 drives the straightening block 2 to move, and the straightening block 2 drives the straightening wheels 26 to move in the opposite direction away from the bending direction of the strip steel. The straightening wheels 26 apply force to straighten the edge of the strip steel, thereby reducing the possibility that the air knife 43 blows onto the strip steel surface due to C-curve after galvanizing, resulting in inconsistent galvanized layer thickness on the strip steel surface and reducing the quality of the strip steel.

[0056] Reference Figure 1 A method for controlling C-warping defects in hot-dip galvanized strip steel includes the following steps:

[0057] S1: Pass the strip steel, which has been galvanized in the zinc pot, through the air knife machine frame 1;

[0058] S2: Before the strip enters the air knife frame 1, acquire the characteristic data of the strip, including the process data in the hot-dip galvanizing production line and the strip shape data;

[0059] S3: Based on the characteristic data of the strip, when it is determined that the strip has C-warping, the straightening wheel 26 on the air knife frame 1 is used to straighten the strip that has C-warping due to heat.

[0060] S4: After the strip is straightened, the excess zinc material on the strip is blown off by the air knife 43 on the air knife frame 1.

[0061] Reference Figure 7 This application also discloses an electronic device for controlling C-warping defects in hot-dip galvanized strip steel, including a memory 7, a processor 71, and a computer program stored in the memory 7 and executable on the processor 71. When the processor 71 executes the program, it is used to confirm and control C-warping defects in hot-dip galvanized strip steel.

[0062] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for controlling C-curve defects in hot-dip galvanized strip steel, characterized in that: The device includes an air knife frame (1) and two movable seats (11) mounted on the air knife frame (1). A straightening block (2) is slidably mounted on each movable seat (11). Grooves (21) are formed on the sides of the two straightening blocks (2) that are close to each other. Mounting grooves (22) are formed on the opposite inner sides of each groove (21). Mounting brackets (23) are slidably mounted within the mounting grooves (22). Straightening wheels (26) are rotatably mounted between the sides of the mounting brackets (23) that are close to each other. A spring (27) is fixed on the inner wall of the mounting slot (22). One end of the spring (27) near the straightening wheel (26) is fixed to the side wall of the mounting bracket (23). A driving assembly for driving the straightening block (2) to move along the length of the moving seat (11) is provided on the movable seat (11). A slide rail (3) is fixed on the top surface of the movable seat (11). A slide groove (31) is opened on the bottom surface of the straightening block (2). The straightening block (2) moves through the slide groove (31). 1) Slidingly mounted on the slide rail (3), the top surface of the slide rail (3) is provided with a moving groove (35), a moving block (32) is fixed on the inner top surface of the slide groove (31), the moving block (32) is inserted into the slide groove (31), the driving assembly includes a screw (33) rotatably mounted between the opposite inner surfaces of the moving groove (35), the screw (33) passes through the moving block (32), the screw (33) is threadedly connected to the moving block (32), the screw (33) One end of the screw (33) passes through the side wall of the slide rail (3), and a rotating block (34) is fixed at the end of the screw (33) away from the slide rail (3). Wedge grooves (13) are provided on both sides of the top surface of the air knife frame (1), and wedge blocks (12) are fixed on both sides of the bottom surface of the moving seat (11). The two wedge blocks (12) are slidably disposed in the two wedge grooves (13), and a fixing member for fixed connection with the air knife frame (1) is provided on the moving seat (11).

2. The device for controlling C-curve defects in hot-dip galvanized strip steel according to claim 1, characterized in that: The top surface of the movable base (11) is provided with threaded holes (14) on both sides. The fixing component includes a bolt (15) inserted into the threaded hole (14). The bolt (15) is threaded to the inner wall of the threaded hole (14). The bottom end of the bolt (15) abuts against the top surface of the air knife frame (1).

3. The device for controlling C-curve defects in hot-dip galvanized strip steel according to claim 1, characterized in that: Both sides of the air knife frame (1) are provided with through grooves (4), and a rotating column (41) is rotatably installed in the through grooves (4). Two recesses (42) are provided on the outer circumference of the rotating column (41), and an air knife (43) is provided in the recesses (42). A fixing component for fixing the rotating column (41) is provided on the air knife frame (1), and an air supply component for supplying air to the air knife (43) is provided on the air knife frame (1).

4. The device for controlling C-curve defects in hot-dip galvanized strip steel according to claim 3, characterized in that: The gas delivery assembly includes an air pump (5) mounted on the air knife frame (1). A three-way pipe (51) is connected to the air outlet of the air pump (5). An air chamber (44) is opened inside the rotating column (41). An air pipe connector (45) is fixed on the inner wall of the settling tank (42). The air pipe connector (45) is connected to the air chamber (44). One end of the air knife (43) is connected to an air pipe connector (46). The air pipe connector (45) is connected to the air pipe connector (46). A through hole (52) is opened on the inner side of the air chamber (44) away from the air knife (43). The other two ports of the three-way pipe (51) are respectively inserted into the two through holes (52). The three-way pipe (51) is rotatably connected to the rotating column (41) through the through holes (52).

5. The device for controlling C-curve defects in hot-dip galvanized strip steel according to claim 4, characterized in that: The air knife frame (1) has two round holes (6) on its side away from the air pump (5). The round holes (6) are connected to the through groove (4). A rotating shaft (61) is inserted into the round holes (6). One end of the rotating shaft (61) is fixedly connected to one end of the rotating column (41). The outer circumferential surface of the rotating column (41) has multiple slots (63). The inner circumferential surface of the round holes (6) has a sliding groove (64). The fixing assembly includes a limiting rod (65) that is slidably disposed in the sliding groove (64) along the vertical direction. The top end of the limiting rod (65) can be inserted into the slot (63). A second spring (66) is fixed to the bottom end of the limiting rod (65). The top end of the second spring (66) is fixed to the bottom surface of the limiting rod (65).

6. The device for controlling C-curve defects in hot-dip galvanized strip steel according to claim 5, characterized in that: The inner side of the sliding groove (64) is provided with an opening (67), and a moving rod (68) is fixed on the side of the limiting rod (65). The end of the moving rod (68) away from the limiting rod (65) passes through the opening (67).

7. A method for controlling C-curve defects in hot-dip galvanized strip steel, based on the apparatus for controlling C-curve defects in hot-dip galvanized strip steel according to any one of claims 1-6, characterized in that, The method includes the following steps: S1: Pass the strip steel, which has been galvanized in the zinc pot, through the air knife machine frame (1); S2: Before the strip enters the air knife frame (1), acquire the characteristic data of the strip, including the process data in the hot-dip galvanizing production line and the strip shape data; S3: Based on the characteristic data of the strip, when it is determined that the strip has C-warping, the strip that has C-warping due to heat is straightened by the straightening wheel (26) on the air knife frame (1): S4: After the strip is straightened, the excess zinc material on the strip is blown off by the air knife (43) on the air knife frame (1).

8. An electronic device for controlling C-warping defects in hot-dip galvanized strip steel, based on the method for controlling C-warping defects in hot-dip galvanized strip steel according to claim 7, characterized in that, It includes a memory (7), a processor (71), and a computer program stored in the memory (7) and capable of running on the processor (71).

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