A device capable of reducing the occurrence rate of zinc flow lines in thick hot-dip galvanized sheets

Abstract

The utility model discloses a device capable of reducing the zinc flow rate of thick-gauge hot-dip galvanized sheet, and relates to the technical field of hot-dip galvanized strip processing, comprising an air knife body, the air knife body comprising a square knife body, an air inlet for supplying air to the inside of the square knife body, and a blowing slot for spraying the air inside the square knife body to the surface of the hot-dip galvanized sheet; the inside of the square knife body is formed with a knife body cavity for air flow, and an exhaust plate is installed inside the knife body cavity, the exhaust plate comprises a plate body arranged along the length direction of the square knife body, a first exhaust hole is provided on the plate body, a valve slot is provided in the middle of the plate body in a truncated manner, and a valve plate is provided in an airtight sliding manner inside the valve slot. The utility model realizes the adjustment of the air flow volume, achieves the purpose of air flow adjustment, realizes the two-way adjustable air flow of the fan and the air knife body, and can effectively increase the use range of air knife zinc sheet production specifications.

Description

Technical Field

[0001] The utility model relates to the technical field of hot-dip galvanized strip steel processing, in particular to a device which can reduce the zinc flow pattern occurrence rate of thick-gauge hot-dip galvanized plates. Background Art

[0002] Ensuring that the temperature of the strip steel can be reduced to below 419°C when it leaves the zinc pot can avoid the formation of zinc flow lines, mainly based on the following reasons:

[0003] First, during the hot-dip galvanizing process, liquid zinc will adhere to the surface of the strip. When the strip leaves the zinc pot, the liquid zinc needs to undergo a cooling and solidification process. The solidification point of zinc is approximately 419°C. Therefore, when the temperature of the strip drops below this solidification point, the liquid zinc on its surface will begin to solidify and form a uniform zinc layer. Secondly, if the temperature of the strip is still high after leaving the zinc pot, exceeding 419°C, the liquid zinc on its surface will remain in a flowing state and will be easily affected by external factors (such as airflow), forming wavy zinc flow lines. This zinc flow line not only affects the appearance quality of the strip, but may also affect its subsequent processing and performance.

[0004] Existing methods for reducing zinc streaks mainly include adjusting galvanizing process parameters, improving the structure of galvanizing equipment, etc. For example, the flow of zinc liquid is controlled by adjusting the spray angle and pressure of the air knife. However, these methods have certain limitations in practical applications. For example, it is difficult to achieve precise control of the adjustment of the air knife spray angle and pressure, and hot-dip galvanized sheets of different thicknesses have different requirements for spray parameters, making it difficult for traditional methods to cope with diverse production needs in actual operations.

[0005] In addition, the existing air knife has a complex structure, is difficult to adjust, and cannot adapt to the rapidly changing production environment. Especially for thick hot-dip galvanized sheets, due to their large thickness, the problem of uneven zinc liquid flow is more prominent. The existing air knife cannot effectively control the distribution of zinc liquid, resulting in a high incidence of zinc flow lines.

[0006] In view of this, this application is hereby filed. Utility Model Content

[0007] The utility model aims to provide a device which can reduce the zinc flow rate of thick hot-dip galvanized sheet, so as to solve the problems raised in the above-mentioned background technology.

[0008] In order to solve the above technical problems, the utility model provides a device for reducing the occurrence rate of zinc flow lines of thick-gauge hot-dip galvanized sheet, comprising an air knife body, wherein the air knife body comprises a square knife body, an air inlet for supplying air to the inside of the square knife body, and a blowing slot for blowing the air inside the square knife body to the surface of the hot-dip galvanized sheet;

[0009] The interior of the square blade body is formed with an inner cavity for air flow, an exhaust plate is installed inside the inner cavity of the blade body, the exhaust plate includes a plate body arranged along the length direction of the square blade body, a first exhaust hole is opened on the plate body, a valve groove is opened in the middle of the plate body in a truncated manner, a valve plate is airtightly slidably arranged inside the valve groove, second exhaust holes are opened in the valve plate corresponding to the first exhaust holes one by one, and the valve plate can move horizontally to adjust the size of the connecting part between the first exhaust hole and the second exhaust hole.

[0010] Furthermore, a follower pin is fixedly installed on the side wall of the square blade body, and an adjusting component for adjusting the horizontal movement of the valve plate is also arranged inside the follower pin. The adjusting component includes a driving shaft rotatably installed inside the follower pin and can rotate around its own axis. A driving disk is fixedly installed on the top end of the driving shaft, and a pin groove is recessed on the top surface of the driving disk. A connecting part is integrally formed on the side wall of the valve plate, and a follower pin is rotatably installed on the bottom surface of the connecting part, and the follower pin is slidably inserted into the inside of the pin groove.

[0011] Furthermore, the square blade body is a rectangular parallelepiped structure, the length of which matches the width of the hot-dip galvanized plate, and blade end plates are provided at both ends of the square blade body, and the blade end plates seal the two ends of the square blade body to form an inner cavity of the blade body.

[0012] Furthermore, an upper blade lip and a lower blade lip are provided on the bottom surface of the square blade body, and the blowing seam is formed at the matching position of the upper blade lip and the lower blade lip.

[0013] Furthermore, the upper blade lip and the lower blade lip are gradually closed from top to bottom, and the sides of the upper blade lip and the lower blade lip are closed by the blade end plate to form a conical cavity for air flow, and the conical cavity is connected with the inner cavity of the blade body.

[0014] Furthermore, the first exhaust hole is a long strip-shaped hole, and a plurality of the first exhaust holes are provided, and the plurality of the first exhaust holes are arranged in parallel with equal distances.

[0015] Furthermore, it also includes an identification component arranged on the follower pin, the identification component includes a rack installed on the top surface of the connecting part and a rotating shaft rotatably installed inside the follower pin, a gear meshing with the rack is fixedly installed on the outer wall of the rotating shaft, the front end of the rotating shaft extends to the front end surface of the follower pin and is fixedly connected with an indicator needle, and the front end surface of the follower pin is installed with an air volume adjustment dial used in conjunction with the indicator needle.

[0016] Furthermore, it also includes a driving component arranged inside the follower pin for driving the driving shaft to rotate, the driving component includes a shielding cylinder fixedly installed on the inner wall of the follower pin, an outer permanent magnetic cylinder and an inner permanent magnetic cylinder are fixedly installed inside the shielding cylinder, the outer permanent magnetic cylinder and the inner permanent magnetic cylinder have opposite poles that attract each other, a conductive ring is rotatably installed between the outer permanent magnetic cylinder and the inner permanent magnetic cylinder, a conductive column is fixedly installed on the top surface of the conductive ring, a conductive sheet is fixedly installed on the top of the conductive column, and the bottom end of the driving shaft is fixedly connected to the center of the top surface of the conductive sheet.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The utility model can adjust the size of the connecting part between the first exhaust hole and the second exhaust hole by adjusting the valve plate to slide horizontally inside the valve slot, produce matching aperture changes, realize the adjustment of the air flow volume, achieve the purpose of air flow adjustment, realize the two-way adjustment of the air flow between the fan and the air knife body, and effectively increase the use range of air knife zinc plate production specifications, especially the applicable range of zinc plate zinc thickness specifications can be increased by more than 20%.

[0019] 2. In the utility model, when adjusting the size of the connecting part between the first exhaust hole and the second exhaust hole, the valve plate will slide toward the inside of the valve groove, and the sliding of the valve plate will drive the connecting part to move, and the connecting part will drive the rack thereon to move synchronously, and the rack will drive the rotating shaft to rotate through the gear meshing therewith, and the rotating shaft will drive the indicator needle to move on the gas volume adjustment dial, and the gas volume size can be grasped through the coordinated indication data of the gas volume adjustment dial and the indicator needle, and the gas volume can be adjusted randomly according to the gas volume requirements set for zinc plate production and the changes in product quality, so that the gas volume is always in the optimal state. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a front view structural schematic diagram of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the utility model when viewed from above;

[0022] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the adjustment component in the utility model;

[0024] Figure 5 It is a structural schematic diagram of the driving component in the utility model.

[0025] In the figure:

[0026] 1. Air knife body; 11. Square knife body; 12. Knife body end plate; 13. Air inlet; 14. Upper knife lip; 15. Lower knife lip; 16. Blowing slot; 17. Exhaust plate; 171. Plate body; 172. First exhaust hole; 173. Valve slot;

[0027] 2. Adjustment assembly; 21. Valve plate; 22. Second exhaust hole; 23. Connecting portion; 24. Drive plate; 25. Drive shaft; 26. Pin groove; 27. Follower pin;

[0028] 3. Identification component; 31. Rack; 32. Rotating shaft; 33. Gear; 34. Indicator needle; 35. Gas volume adjustment dial;

[0029] 4. Driving assembly; 41. Shielding tube; 42. Outer permanent magnetic tube; 43. Inner permanent magnetic tube; 44. Conductive ring; 45. Conductive column; 46. Conductive sheet. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] See also Figure 1-4 The utility model provides a technical solution: a device capable of reducing the occurrence rate of zinc flow lines of thick-gauge hot-dip galvanized sheet, comprising an air knife body 1, the air knife body 1 comprising a square knife body 11, an air inlet 13 for supplying air to the inside of the square knife body 11, and a blowing slot 16 for blowing the air inside the square knife body 11 to the surface of the hot-dip galvanized sheet;

[0032] The square blade body 11 is formed with a blade inner cavity for air flow, and an exhaust plate 17 is installed inside the blade inner cavity. The exhaust plate 17 includes a plate body 171 arranged along the length direction of the square blade body 11, and a first exhaust hole 172 is opened on the plate body 171. A valve groove 173 is opened in the middle of the plate body 171 in a truncated manner. A valve plate 21 is airtightly slidably arranged inside the valve groove 173. Second exhaust holes 22 are opened in the valve plate 21 corresponding to the first exhaust holes 172 one by one. The valve plate 21 can move horizontally to adjust the size of the connecting portion between the first exhaust hole 172 and the second exhaust hole 22.

[0033] By adjusting the valve plate 21 to slide horizontally inside the valve groove 173, the size of the connecting part between the first exhaust hole 172 and the second exhaust hole 22 can be adjusted, resulting in a matching aperture change, and the air flow volume can be adjusted to achieve the purpose of air flow adjustment. The airflow between the fan and the air knife body 1 is bidirectionally adjustable, which can effectively increase the use range of air knife zinc plate production specifications, especially the applicable range of zinc plate zinc thickness specifications can be increased by more than 20%.

[0034] See also Figure 1 A follower pin 27 is fixedly installed on the side wall of the square blade body 11, and an adjusting component 2 for adjusting the horizontal movement of the valve plate 21 is also arranged inside the follower pin 27. The adjusting component 2 includes a driving shaft 25 rotatably installed inside the follower pin 27 and rotatable around its own axis. A driving disk 24 is fixedly installed on the top of the driving shaft 25, and a pin groove 26 is recessed on the top surface of the driving disk 24. A connecting portion 23 is integrally formed on the side wall of the valve plate 21, and a follower pin 27 is rotatably installed on the bottom surface of the connecting portion 23, and the follower pin 27 is slidably inserted into the inside of the pin groove 26.

[0035] See also Figure 1 and Figure 2 The square blade body 11 is a rectangular parallelepiped structure, and its length matches the width of the hot-dip galvanized sheet. Both ends of the square blade body 11 are provided with blade end plates 12, and the blade end plates 12 seal the two ends of the square blade body 11 to form an inner cavity of the blade body. The bottom surface of the square blade body 11 is provided with an upper blade lip 14 and a lower blade lip 15, and a spraying seam 16 is formed at the matching position of the upper blade lip 14 and the lower blade lip 15; the upper blade lip 14 and the lower blade lip 15 are gradually closed from top to bottom, and the sides of the upper blade lip 14 and the lower blade lip 15 are closed by the blade end plates 12 to form a conical cavity for air flow, and the conical cavity is connected with the inner cavity of the blade body;

[0036] The conical cavity helps to increase the chances of multiple reflections within the cavity. When air flows in the cavity, due to the guidance of the conical structure, the airflow is more likely to be evenly distributed in the cavity, and the air flow path remains unobstructed in the forward direction to the greatest extent to reduce flow resistance, making the air volume at each outlet tend to be evenly distributed.

[0037] See also Figure 3 The first exhaust hole 172 is a long strip hole, and a plurality of first exhaust holes 172 are provided, and the plurality of first exhaust holes 172 are arranged in parallel with equal distances.

[0038] See also Figure 1 and Figure 3, further comprising an identification assembly 3 arranged on the follower pin 27, the identification assembly 3 comprising a rack 31 mounted on the top surface of the connecting portion 23 and a rotating shaft 32 rotatably mounted inside the follower pin 27, a gear 33 meshingly connected with the rack 31 is fixedly mounted on the outer wall of the rotating shaft 32, the front end of the rotating shaft 32 extends to the front end surface of the follower pin 27 and is fixedly connected with an indicator needle 34, and the front end surface of the follower pin 27 is installed with a gas volume adjustment dial 35 used in conjunction with the indicator needle 34;

[0039] When adjusting the size of the connecting part between the first exhaust hole 172 and the second exhaust hole 22, the valve plate 21 will slide toward the inside of the valve groove 173, and the sliding of the valve plate 21 will drive the connecting part 23 to move, and the connecting part 23 will drive the rack 31 thereon to move synchronously, and the rack 31 will drive the rotating shaft 32 to rotate through the gear 33 meshing therewith, and the rotating shaft 32 will drive the indicator needle 34 to move on the gas volume adjustment dial 35. The gas volume size can be grasped through the coordinated indication data of the gas volume adjustment dial 35 and the indicator needle 34, and the gas volume requirement is set according to the zinc plate production and the random gas volume adjustment according to the change of product quality, so that the gas volume is always in the optimal state.

[0040] See also Figure 3 and Figure 5 , and also includes a driving assembly 4 arranged inside the follower pin 27 for driving the driving shaft 25 to rotate, the driving assembly 4 includes a shielding cylinder 41 fixedly installed on the inner wall of the follower pin 27, an outer permanent magnetic cylinder 42 and an inner permanent magnetic cylinder 43 are fixedly installed inside the shielding cylinder 41, and the outer permanent magnetic cylinder 42 and the inner permanent magnetic cylinder 43 have opposite poles that attract each other, and a conductive ring 44 is rotatably installed between the outer permanent magnetic cylinder 42 and the inner permanent magnetic cylinder 43, a conductive column 45 is fixedly installed on the top surface of the conductive ring 44, a conductive sheet 46 is fixedly installed on the top of the conductive column 45, and the bottom end of the driving shaft 25 is fixedly connected to the center of the top surface of the conductive sheet 46;

[0041] During use, the conductive ring 44 and the conductive sheet 46 are connected to the positive and negative poles of the DC power supply respectively, and the current is connected in the positive direction, and a DC current is generated from bottom to top on each conductive column 45; since the opposite poles of the outer permanent magnetic cylinder 42 and the inner permanent magnetic cylinder 43 attract each other, a ring-shaped magnetic field is formed between the outer permanent magnetic cylinder 42 and the inner permanent magnetic cylinder 43, and the direction of the magnetic field is perpendicular to the axis of the permanent magnetic cylinder; according to the principle of electromagnetics, the current is acted upon by a force in the magnetic field, so each conductive column 45 will be acted upon by the force of the magnetic field, that is, each conductive column 45 is acted upon in the tangential direction of the conductive ring 44; this force drives each conductive column 45 to rotate around the axis of the conductive ring 44, thereby driving the conductive sheet 46, the conductive ring 44 and the drive shaft 25 to rotate; thereby driving the drive shaft 25 to rotate, the air knife body 1 is arranged on a platform above the zinc pot, about 1 meter away from the zinc liquid, the zinc liquid temperature is in a molten state for a long time, and the temperature around the air knife body 1 is as high as about 500°C, and this driving mode can avoid being affected by high temperature.

[0042] Working principle: When in use, the driving shaft 25 is driven to rotate through the driving component 4, and the driving shaft 25 will drive the driving disk 24 to rotate. The pin groove 26 set on the driving disk 24 will drive the follower pin 27 to move, and the follower pin 27 drives the valve plate 21 to move horizontally inside the valve groove 173 through the connecting part 23. The size of the connecting part between the first exhaust hole 172 and the second exhaust hole 22 can be adjusted by adjusting the valve plate 21 to slide horizontally inside the valve groove 173, so as to produce a matching aperture change, realize the adjustment of the air flow volume, and achieve the purpose of air flow adjustment. The airflow of the fan and the air knife body 1 can be adjusted in both directions, which can effectively increase the use range of the production specifications of the air knife zinc plate, especially the zinc plate zinc The applicable scope of thick specifications can be increased by more than 20%. When adjusting the size of the connecting part between the first exhaust hole 172 and the second exhaust hole 22, the valve plate 21 will slide toward the inside of the valve groove 173, and the sliding of the valve plate 21 will drive the connecting part 23 to move, and the connecting part 23 will drive the rack 31 thereon to move synchronously, and the rack 31 drives the rotating shaft 32 to rotate through the gear 33 meshing therewith, and the rotating shaft 32 drives the indicator needle 34 to move on the gas volume adjustment dial 35. The gas volume size is grasped through the coordinated indication data of the gas volume adjustment dial 35 and the indicator needle 34, and the gas volume is set according to the zinc plate production needs and the random gas volume adjustment according to the product quality changes, so that the gas volume is always in the optimal state.

Claims

1. A device for reducing the incidence of zinc flow lines on thick hot-dip galvanized sheet, comprising an air knife body (1), characterized in that: The air knife body (1) comprises a square knife body (11), an air inlet (13) for supplying air to the interior of the square knife body (11), and a blowing slot (16) for blowing air from the interior of the square knife body (11) onto the surface of the hot-dip galvanized sheet; The square blade body (11) is internally formed with a blade body inner cavity for air flow, and an exhaust plate (17) is installed inside the blade body inner cavity. The exhaust plate (17) comprises a plate body (171) arranged along the length direction of the square blade body (11), and a first exhaust hole (172) is opened on the plate body (171). A valve groove (173) is opened in a truncated manner in the middle of the plate body (171), and a valve plate (21) is airtightly slidably arranged inside the valve groove (173). Second exhaust holes (22) are opened in the valve plate (21) in a one-to-one correspondence with the first exhaust holes (172), and the valve plate (21) can move horizontally to adjust the size of the connecting portion between the first exhaust hole (172) and the second exhaust hole (22).

2. A device for reducing the incidence of zinc flow lines in thick hot-dip galvanized sheet as claimed in claim 1, characterized in that: A follower pin (27) is fixedly mounted on the side wall of the square blade body (11), and an adjusting component (2) for adjusting the horizontal movement of the valve plate (21) is also arranged inside the follower pin (27), and the adjusting component (2) comprises a driving shaft (25) rotatably mounted inside the follower pin (27) and rotatable around its own axis, a driving disk (24) is fixedly mounted on the top end of the driving shaft (25), and a pin groove (26) is recessed on the top surface of the driving disk (24), and a connecting portion (23) is integrally formed on the side wall of the valve plate (21), and a follower pin (27) is rotatably mounted on the bottom surface of the connecting portion (23), and the follower pin (27) is slidably inserted into the inside of the pin groove (26).

3. A device for reducing the incidence of zinc flow lines in thick hot-dip galvanized sheet as claimed in claim 1, characterized in that: The square blade body (11) is a rectangular parallelepiped structure, the length of which matches the width of the hot-dip galvanized plate, and blade body end plates (12) are provided at both ends of the square blade body (11), and the blade body end plates (12) seal the two ends of the square blade body (11) to form an inner cavity of the blade body.

4. A device for reducing the incidence of zinc flow lines in thick hot-dip galvanized sheet as claimed in claim 1, characterized in that: An upper blade lip (14) and a lower blade lip (15) are provided on the bottom surface of the square blade body (11), and the blowing seam (16) is formed at the matching position of the upper blade lip (14) and the lower blade lip (15).

5. A device for reducing the occurrence rate of zinc flow lines in thick hot-dip galvanized sheet as claimed in claim 4, characterized in that: The upper blade lip (14) and the lower blade lip (15) are gradually closed from top to bottom, and the side portions of the upper blade lip (14) and the lower blade lip (15) are closed by the blade body end plate (12) to form a conical cavity for air flow, and the conical cavity is connected to the inner cavity of the blade body.

6. A device for reducing the occurrence rate of zinc flow lines in thick hot-dip galvanized sheet as claimed in claim 1, characterized in that: The first exhaust hole (172) is a long strip-shaped hole, a plurality of the first exhaust holes (172) are provided, and the plurality of the first exhaust holes (172) are arranged in parallel at equal distances.

7. A device for reducing the occurrence rate of zinc flow lines in thick hot-dip galvanized sheet as claimed in claim 2, characterized in that: The invention also comprises an identification component (3) arranged on the follower pin (27), the identification component (3) comprising a rack (31) mounted on the top surface of the connecting portion (23) and a rotating shaft (32) rotatably mounted inside the follower pin (27), a gear (33) meshingly connected with the rack (31) being fixedly mounted on the outer wall of the rotating shaft (32), a front end of the rotating shaft (32) extending to the front end surface of the follower pin (27) and fixedly connected with an indicator needle (34), and a gas volume adjustment dial (35) used in conjunction with the indicator needle (34) being mounted on the front end surface of the follower pin (27).

8. A device for reducing the occurrence rate of zinc flow lines in thick hot-dip galvanized sheet as claimed in claim 2, characterized in that: It also includes a driving assembly (4) arranged inside the follower pin (27) for driving the driving shaft (25) to rotate, the driving assembly (4) including a shielding cylinder (41) fixedly mounted on the inner wall of the follower pin (27), an outer permanent magnetic cylinder (42) and an inner permanent magnetic cylinder (43) fixedly mounted inside the shielding cylinder (41), opposite cylinder surfaces of the outer permanent magnetic cylinder (42) and the inner permanent magnetic cylinder (43) attract each other with opposite poles, a conductive ring (44) is rotatably mounted between the outer permanent magnetic cylinder (42) and the inner permanent magnetic cylinder (43), a conductive column (45) is fixedly mounted on the top surface of the conductive ring (44), a conductive sheet (46) is fixedly mounted on the top end of the conductive column (45), and the bottom end of the driving shaft (25) is fixedly connected to the center of the top surface of the conductive sheet (46).

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