Device and method for adjusting the blowing width of an air knife lip of hot-dip galvanized sheet production equipment

Abstract

The present invention relates to a device and method for adjusting the blowing width of an air knife lip for hot-dip galvanized sheet production equipment, belonging to the technical field of metallurgical special equipment. The technical solution is: a driving mechanism drives a closed elastic steel belt (21) to move back and forth laterally along a gap (29), while simultaneously driving a triangular closed copper block (19) and a closed copper block tail joint (20) to move back and forth laterally along an inner cavity (28) of the air knife lip and an inner cavity (18) of the air knife body, respectively; as the closing mechanism moves back and forth laterally within the air knife outlet cavity, the width of the air knife body cavity (18) blocked by the closing mechanism will change accordingly. The positive effects of the present invention are: the blowing width of the air knife lip blowing port (23) can be changed according to production needs, achieving on-demand adjustment, multi-purpose use of one machine, reducing idle air knife equipment, and overcoming the waste of air flow from the air knife lip blowing.

Description

Technical Field

[0001] The invention relates to a device and method for adjusting the blowing width of an air knife lip of equipment for producing hot-dip galvanized sheets, belonging to the technical field of metallurgical special equipment. Background Art

[0002] Air knives are special equipment used in the production of hot-dip galvanized sheets. Currently, the air knives used on the market generally do not have a device to adjust the air blowing width of the air knife lip. In the production of hot-dip galvanized sheets, the air blowing width of the air knife lip is fixed and cannot be adjusted randomly. One type of air knife can only produce one type of zinc sheet with the same width. Currently, there are more than ten varieties of plate widths on the market. If an enterprise implements diversified production, it needs to purchase multiple air knives for reserve use. The current minimum price of an ordinary air knife is over 100,000 yuan, and an intelligent air knife is over 1 million yuan, which will take up a lot of funds. It is impossible for an enterprise to produce new versions of various widths at the same time, and the air knives will be idle, increasing the burden on the enterprise. When using a large-width air knife to produce narrow-width zinc sheets, a large amount of reactive air will be blown at both ends of the air knife lip, resulting in airflow waste, increased electricity consumption, and affecting the efficiency of the enterprise. Summary of the Invention

[0003] The purpose of the present invention is to provide a device and method for adjusting the blowing width of the air knife lip of equipment for hot-dip galvanized sheet production, so that the air knife blowing width can be adjusted on demand according to production needs, one machine can be used for multiple purposes, the idleness of air knife equipment can be reduced, the waste of air knife lip blowing airflow can be overcome, work efficiency can be improved, and the above-mentioned problems existing in the background technology can be solved.

[0004] The technical solution of the present invention is:

[0005] A device for adjusting the lip blowing width of an air knife used in hot-dip galvanized sheet production equipment comprises a driving mechanism and a closing mechanism, wherein the driving mechanism drives the closing mechanism to move back and forth laterally within the air outlet cavity of the air knife;

[0006] The closing mechanism comprises a closed elastic steel strip, a triangular closed copper block and a closed copper block tail joint, the driving mechanism is drivingly connected to the head end of the closed elastic steel strip, and the front and rear sides of the tail end of the closed elastic steel strip are respectively connected to the triangular closed copper block and the closed copper block tail joint;

[0007] The air knife outlet cavity comprises an air knife lip cavity and an air knife body inner cavity arranged in front and back, the air knife lip cavity and the air knife body inner cavity are connected by a gap, and the front end of the air knife lip cavity is a lip air blowing port;

[0008] The triangular closed copper block is located in the inner cavity of the air knife lip, the closed elastic steel belt is located in the gap, and the tail joint of the closed copper block is located in the inner cavity of the air knife body. The driving mechanism drives the closed elastic steel belt to move back and forth laterally along the gap, and at the same time drives the triangular closed copper block and the tail joint of the closed copper block to move back and forth laterally along the inner cavity of the air knife lip and the inner cavity of the air knife body respectively. The width of the closed elastic steel belt is greater than the height of the inner cavity of the air knife lip and the inner cavity of the air knife body; when the closed elastic steel belt moves back and forth laterally in the gap, the inner cavity of the air knife body through which it passes is laterally closed, and the triangular closed copper block longitudinally closes the inner cavity of the air knife lip; as the closing mechanism moves back and forth laterally in the air outlet cavity of the air knife, the width of the blocking of the inner cavity of the air knife body by the closing mechanism will change accordingly, and the air flow output by the inner cavity of the air knife body will also change accordingly, thereby adjusting the blowing width of the air outlet of the lip.

[0009] Furthermore, the driving mechanism comprises a driving wheel device and a driven wheel device, and both the driving wheel device and the driven wheel device are mounted on the air knife body end plate on the side of the air knife body;

[0010] The driving wheel device comprises a driving wheel core shaft, an adjustment device upper cover, a driving wheel gear and an outer protective cover of the driving wheel device. The upper end of the driving wheel core shaft is connected to the servo motor on the air knife beam through a universal joint, and the lower end of the driving wheel core shaft passes through the adjustment device upper cover and extends into the outer protective cover of the driving wheel device and is provided with a driving wheel gear;

[0011] The driven wheel device comprises a driven wheel core shaft, a driven wheel toothed disc, a closed elastic steel belt seat, a closed elastic steel belt interface and an outer shield of the driven wheel device, the outer shield of the driving wheel device is connected up and down with the outer shield of the driven wheel device, the driven wheel core shaft passes through the outer shield of the driven wheel device, a driven wheel toothed disc is rotatably provided on the driven wheel core shaft, and the driven wheel toothed disc is meshed with the driving wheel gear; a closed elastic steel belt seat is provided in the outer shield of the driven wheel device, an annular groove is provided at the outer edge of the closed elastic steel belt seat, and a ring groove is provided on the outer shield of the driving wheel device Groove 2 is tangent to groove 1, and annular groove 1 and groove 2 are connected; the driven wheel gear disc is arranged on the upper end surface of the closed elastic steel belt seat and is connected thereto, a closed elastic steel belt interface is provided at the outer edge of the closed elastic steel belt seat, and a closed elastic steel belt joint is provided at the head end of the closed elastic steel belt. The closed elastic steel belt joint is fixed to the closed elastic steel belt interface by bolts, and the closed elastic steel belt is surrounded by annular groove 1. After extending out of the outer shield of the driving wheel device from groove 2, it enters the gap through the elastic belt steel cut of the air knife end plate of the air knife body end plate.

[0012] Furthermore, the upper end surface of the outer shield of the driving wheel device is an upper cover of the adjusting device, and an upper connector of the adjusting device is provided on one side of the upper end surface of the upper cover of the adjusting device. A plurality of circular locking rods are transversely arranged on the upper connector of the adjusting device, which are respectively locked and docked with the circular holes matching the end plate of the air knife body;

[0013] A driven wheel base is provided at the lower end of the outer shield of the driven wheel device, the upper end of the driven wheel core shaft is provided on the upper cover of the adjustment device, the lower end of the driven wheel core shaft is provided on the driven wheel base, and an adjusting device lower connector is provided on the side of the driven wheel base. A plurality of circular locking rods are horizontally provided on the adjusting device lower connector, which are respectively locked and docked with two matching circular holes on the end plate of the air knife body; an adjusting device lower shield is provided below the driven wheel base, and the adjusting device lower shield covers the adjusting device lower connector.

[0014] Furthermore, the air knife lip inner cavity is an inner cavity formed by the air knife upper lip and the air knife lower lip, and its cross section is a triangle that is narrow in front and wide in the back. The cross section of the triangular closed copper block matches the cross section of the air knife lip inner cavity.

[0015] Furthermore, a closed elastic steel strip tail joint is provided at the tail end of the closed elastic steel strip, and the triangular closed copper block and the closed copper block tail joint are respectively fixed to the front and rear sides of the closed elastic steel strip tail joint by bolts.

[0016] Furthermore, a driving wheel fixing sleeve is provided at the driving wheel core shaft, the upper end of the driving wheel fixing sleeve is provided on the universal shaft through flange 1, and the lower end of the driving wheel fixing sleeve is connected to the upper cover of the adjustment device through flange 3.

[0017] Furthermore, the driving mechanism and the closing mechanism are divided into two groups, and the two groups of driving mechanisms and closing mechanisms have the same structure and are respectively arranged on the end plates of the air knife body on both sides of the air knife body.

[0018] The universal joint shaft and the air knife body are commonly known and used in the art.

[0019] A method for adjusting the lip width of an air knife used in hot-dip galvanized sheet production equipment adopts the above-mentioned air knife lip blowing width adjustment device used in hot-dip galvanized sheet production equipment, and the specific steps are as follows:

[0020] ① Start the power supply and computer control system, and run the servo motor on the air knife beam forward and reverse according to the computer instructions;

[0021] ② The servo motor on the air knife beam drives the universal joint to run forward and reverse, and the universal joint drives the driving wheel core shaft connected to it and the driving wheel gear on the driving wheel core shaft to run forward and reverse, and the driving wheel gear drives the driven wheel gear plate meshing with it to run forward and reverse, and the driven wheel gear plate drives the closed elastic steel belt seat to run forward and reverse;

[0022] ③ When the closed elastic steel belt seat runs forward and backward, the closed elastic steel belt moves back and forth along the gap, and at the same time drives the triangular closed copper block and the closed copper block tail joint to move back and forth along the inner cavity of the air knife lip and the inner cavity of the air knife body respectively. The closed elastic steel belt horizontally closes the inner cavity of the air knife body through which it passes, and the triangular closed copper block longitudinally closes the inner cavity of the air knife lip;

[0023] ④ As the closing mechanism moves back and forth laterally in the air outlet cavity of the air knife, the width of the sealing mechanism's blocking of the air knife cavity will change accordingly, and the air flow output from the air knife cavity will also change accordingly, thereby adjusting the air blowing width of the knife lip air port. The air flow is ejected through the knife lip air port, blowing towards the zinc plate, and scraping the zinc liquid on the zinc plate.

[0024] The positive effects of the present invention are as follows: the driving mechanism drives the sealing mechanism to seal the inner cavity of the air knife body. As the sealing mechanism moves, the sealing width will change accordingly, so that the blowing width of the lip blowing port can be changed according to production needs, achieving on-demand adjustment, multi-purpose use of one machine, reducing the idleness of air knife equipment, and overcoming the waste of air flow from the lip blowing port of the air knife. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the decomposition structure of an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the assembled structure of an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the assembled structure of the embodiment of the present invention from above;

[0028] Figure 4 This is a schematic structural diagram of a driving wheel device according to an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the top view of the driven wheel device according to an embodiment of the present invention;

[0030] Figure 6 for Figure 5 Schematic diagram of direction B;

[0031] Figure 7 This is a schematic diagram of the sealing mechanism of the embodiment of the present invention being located in the air outlet cavity of the air knife;

[0032] Figure 8 for Figure 7 A magnified view of part A;

[0033] Figure 9 This is a schematic diagram of an embodiment of the present invention in use (the upper lip of the air knife is not shown in the figure);

[0034] In the figure: universal joint 1, driving wheel core shaft 2, driving wheel fixing sleeve 3, driving wheel gear 4, adjustment device upper cover 5, adjustment device upper connector 6, driven wheel core shaft 7, driven wheel gear plate 8, closed elastic steel belt seat 9, closed elastic steel belt interface 10, driven wheel base 11, adjustment device lower connector 12, closed elastic steel belt joint 13, air knife upper lip 14, air knife lower lip 15, air knife body end plate 16, air knife end plate elastic belt steel cutting Opening 17, inner cavity of air knife body 18, triangular closed copper block 19, closed copper block tail joint 20, closed elastic steel belt 21, closed elastic steel belt tail joint 22, knife lip air blowing port 23, air knife body 24, outer protective cover of driving wheel device 25, outer protective cover of driven wheel device 26, lower protective cover of adjustment device 27, inner cavity of air knife lip 28, gap 29, circular locking rod 1 30, circular locking rod 2 31, annular groove 1 32, groove 2 33. DETAILED DESCRIPTION

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0036] Refer to the attached Figure 1-9 This embodiment provides a device for adjusting the blowing width of the air knife lip of hot-dip galvanized sheet production equipment, which is used to adjust the blowing width of the air knife lip of hot-dip galvanized sheet production equipment.

[0037] In this embodiment, the air knife body 24 is provided with an air knife upper lip 14, an air knife lower lip 15, a lip seat, and an air knife body end plate 16. Air knife body end plates 16 are provided on both sides of the air knife body 24, and an air knife body inner cavity 18 is provided inside the air knife body 24. The air knife upper lip 14 and the air knife lower lip 15 are mounted on the lip seat up and down, and a transverse air knife lip inner cavity 28 is formed between the air knife upper lip 14 and the air knife lower lip 15. The cross-section of the air knife lip inner cavity 28 is a triangle that is narrow in front and wide in the back. After the air knife upper lip 14 and the air knife lower lip 15 are assembled with the lip seat, a gap 29 is formed between the tail ends of the air knife upper lip 14 and the air knife lower lip 15 and the lip seat. The air knife body inner cavity 18 is connected to the air knife lip inner cavity 28 to form an air blowing channel. The front end of air knife upper lip 14 and air knife lower lip 15 forms correspondingly the air knife lip blowing port 23. Air flow blows toward zinc plate through the air knife lip blowing port 23 after passing through air knife blade body inner cavity 18 and air knife lip inner cavity 28.

[0038] In this embodiment, there are two air knife lip width adjustment devices, which are respectively installed on the air knife body end plates 16 on the left and right sides of the air knife body 24. The driving mechanisms in the two air knife lip width adjustment devices drive the corresponding sealing mechanisms to move back and forth horizontally within the air knife outlet cavity, thereby jointly sealing the air knife outlet cavity and adjusting the blowing width of the air knife lip blowing port 23.

[0039] Refer to the attached Figure 1-4, taking the driving mechanism and closing mechanism on the right as an example:

[0040] The driving mechanism includes a driving wheel device and a driven wheel device, and the driving wheel device and the driven wheel device are respectively installed on the air knife body end plate 16 on the right side of the air knife body 24.

[0041] The driving wheel device includes a universal joint 1, a driving wheel core shaft 2, a driving wheel fixing sleeve 3, a driving wheel gear 4, an adjustment device upper cover 5, an adjustment device upper connector 6, and a driving wheel device outer shield 25. The upper end of the driving wheel core shaft 2 is connected to the servo motor on the air knife beam through the universal joint 1, and the lower end of the driving wheel core shaft 2 extends into the driving wheel device outer shield 25 and is provided with a driving wheel gear 4. The upper end surface of the driving wheel device outer shield 25 is the adjustment device upper cover 5. The upper end surface of the adjustment device upper cover 5 is provided with an adjustment device upper connector 6 on one side. The adjustment device upper connector 6 is provided with multiple circular locking rods in a transverse direction, which are respectively locked and connected with matching circular holes on the air knife blade end plate 16. The driving wheel fixing sleeve 3 is provided on the outside of the driving wheel core shaft 2. The driving wheel fixing sleeve 3 is provided between the lower end shell of the universal joint 1 and the adjustment device upper cover 5 via a flange.

[0042] The specific installation method of the driving wheel device is as follows:

[0043] The upper end of the universal joint 1 is connected to the servo motor on the air knife frame, and the lower end of the universal joint 1 is bolted to the driving wheel core shaft 2. A driving wheel fixing sleeve 3 is installed on the outside of the driving wheel core shaft 2. The driving wheel fixing sleeve 3 is cylindrical and thin at the top and thick at the bottom. Flange 1 is installed on the upper end of the driving wheel fixing sleeve 3 to mate with flange 2 on the end of the universal joint 1; flange 3 is also installed on the lower end of the driving wheel fixing sleeve 3. A circular hole matching the outer diameter of the driving wheel core shaft 2 is sawn in a corner of the side of the adjustment device upper cover 5. The driving wheel core shaft 2 extends downward from the driving wheel fixing sleeve 3 and enters the driving wheel device outer shield 25 through the circular hole. Flange 3 at the lower end of the driving wheel fixing sleeve 3 is bolted to the circular hole above the adjustment device upper cover 5. After assembly, the driving wheel core shaft 2 is placed upright and inverted on the adjustment device upper cover 5. The outer diameter of the lower end of the driving wheel core shaft 2 is directly sawn into the toothed driving wheel gear 4, ready for mating with the driven wheel sprocket 8. A rectangular parallelepiped upper connector 6 is provided above the outer end of the upper cover 5 of the adjustment device. A row of about five circular locking rods 30 are provided transversely on the upper connector 6 to prepare for locking docking with matching circular holes on the end plate 16 of the air knife body.

[0044] Refer to the attached Figure 1 、 2, 5 and 6, the driven wheel device includes a driven wheel core shaft 7, a driven wheel gear plate 8, a closed elastic steel belt seat 9, a closed elastic steel belt interface 10, a driven wheel base 11, an adjustment device lower connector 12 and a driven wheel device outer shield 26. The outer shield 25 of the driving wheel device is connected to the outer shield 26 of the driven wheel device up and down, the driven wheel core shaft 7 passes through the outer shield 26 of the driven wheel device, and the lower end of the outer shield 26 of the driven wheel device is provided with a driven wheel base 11, the upper end of the driven wheel core shaft 7 is provided on the upper cover 5 of the adjusting device, and the lower end of the driven wheel core shaft 7 is provided on the driven wheel base 11, and the side of the driven wheel base 11 is provided with an adjusting device lower connector 12, and a plurality of circular locking rods are horizontally provided on the adjusting device lower connector 12, which are respectively locked and docked with two matching circular holes on the end plate 16 of the air knife body; an adjusting device lower shield 27 is provided below the driven wheel base 11, and the adjusting device lower shield 27 covers the adjusting device lower connector 12.

[0045] The driven wheel core shaft 7 is provided with a driven wheel toothed disc 8, which is meshed with the driving wheel gear 4; a closed elastic steel belt seat 9 is provided in the outer shield 26 of the driven wheel device, and an annular groove 32 is provided at the outer edge of the closed elastic steel belt seat 9, and the upper end of the annular groove 32 protrudes from the upper end surface of the driven wheel device outer shield 26, and a groove 23 is provided on the outer shield 25 of the driving wheel device, which is tangent to the annular groove 32, and the annular groove 32 and the groove 23 are annularly connected; the driven wheel toothed disc 8 is set at the upper end of the closed elastic steel belt seat 9 and is concentrically arranged on the driven wheel device. On the wheel core shaft 7, the driven wheel sprocket 8 drives the closed elastic steel belt seat 9 to rotate in the outer shield 26 of the driven wheel device. A closed elastic steel belt interface 10 is provided at the outer edge of the closed elastic steel belt seat 9. The head end of the closed elastic steel belt 21 is provided with a closed elastic steel belt joint 13. The closed elastic steel belt joint 13 is fixed to the closed elastic steel belt interface 10 by bolts. The closed elastic steel belt 21 is surrounded by an annular groove 1 32. After extending from the outer shield 25 of the driving wheel device from the groove 2 33, it enters the gap 29 through the air knife end plate elastic belt steel incision 17 of the air knife body end plate 16.

[0046] The specific installation method of the driven wheel device is as follows:

[0047] A circular hole matching the driven wheel core shaft 7 is sawed in the center of the upper cover 5 of the adjustment device. The cross-section of the driven wheel core shaft 7 is an inverted T-shape, with a vertical cylinder at the top and a disc-shaped chassis at the bottom. The cylinder and chassis are an integrated device. The matching bolt at the upper end of the driven wheel core shaft 7 is installed on the circular hole set in the center of the upper cover 5 of the adjustment device. The driven wheel sprocket 8, the closed elastic steel belt seat 9 and the driven wheel base 11 are assembled in sequence from top to bottom between the disc-shaped chassis at the lower end of the driven wheel core shaft 7 and the upper cover 5 of the adjustment device. The end of the driven wheel base 11 is provided with an adjustment device lower connector 12, and a plurality of circular locking rods are horizontally provided on the adjustment device lower connector 12, which are respectively locked and docked with two matching circular holes on the end plate 16 of the air knife blade body. The driven wheel sprocket 8 is meshed with the driving wheel gear 4. The bottom surface of the closed elastic steel belt seat 9 is flat, with an annular protrusion on the upper end plane of the bottom surface. The annular protrusion is provided with an annular groove 1 32. The driving wheel device outer shield 25 is provided with a groove 2 33 tangential to the annular groove 1 32. The annular groove 1 32 and the groove 2 33 are annularly matched and connected. The driven wheel gear plate 8 is set at the upper end of the closed elastic steel belt seat 9 and is concentrically mounted on the driven wheel core shaft 7. The closed elastic steel belt interface 10 is provided at an appropriate position on the edge of the closed elastic steel belt seat 9. The closed elastic steel belt joint 13 at the head end of the closed elastic steel belt 21 is bolted to the closed elastic steel belt interface 10. After installation, the closed elastic steel belt 21 is wrapped around the annular groove 1 32, and the closed elastic steel belt 21 extends out of the driving wheel device outer shield 25 through the groove 2 33. An elastic steel strip cut 17 of the air knife end plate that matches the closed elastic steel strip 21 is sawed at the corresponding position of the air knife body end plate 16, and the tail end of the closed elastic steel strip 21 extends out of the elastic steel strip cut 17 of the air knife end plate 16 of the air knife body.

[0048] In this embodiment, in order to ensure the safety and stability of the air knife blade width adjustment device, the driving wheel device, the driven wheel device and the lower connecting body 12 of the adjustment device are divided into three layers, and three layers of shield protection are implemented. The top layer is the outer shield 25 of the driving wheel device, which is used to protect the driving wheel device; the middle layer is the outer shield 26 of the driven wheel device, which is used to protect the driven wheel device; the bottom layer is the lower shield 27 of the adjustment device. The lower shield 27 of the adjustment device is square disc-shaped and is also the bottom plate of the air knife blade width adjustment device, and at the same time protects the lower connecting body 12 of the adjustment device and the driven wheel base 11.

[0049] The driving wheel device outer shield 25, the driven wheel device outer shield 26, and the adjustment device lower shield 27 are assembled and plugged in sequence from top to bottom. After assembly, the whole is in a rectangular shape with a length, width and height of about 320mm×310mm×120mm.

[0050] Refer to the attached Figure 7-9The closure mechanism includes a closed elastic steel strip joint 13, a closed elastic steel strip tail joint 22, a closed elastic steel strip 21, a triangular closed copper block 19, and a closed copper block tail joint 20. The closed elastic steel strip joint 13 and the closed elastic steel strip tail joint 22 are respectively provided at the head and tail ends of the closed elastic steel strip 21.

[0051] The triangular closed copper block 19 is located in the air knife lip cavity 28, the closed elastic steel belt 21 is located in the gap 29, and the closed copper block tail joint 20 is located in the air knife body cavity 18. The driving mechanism drives the closed elastic steel belt 21 to move back and forth laterally along the gap 29, and at the same time drives the triangular closed copper block 19 and the closed copper block tail joint 20 to move back and forth laterally along the air knife lip cavity 28 and the air knife body cavity 18 respectively. The width of the closed elastic steel belt 21 is greater than the air knife lip cavity 28. and the height of the inner cavity 18 of the air knife blade body; the closed elastic steel belt 21 transversely closes the inner cavity 18 of the air knife blade body through which it passes, and the triangular closed copper block 19 longitudinally closes the inner cavity 28 of the air knife lip; as the closing mechanism moves back and forth laterally in the air knife outlet cavity, the sealing width of the air knife blade body cavity 18 by the closing mechanism will change accordingly, and the air flow output by the inner cavity 18 of the air knife blade body will also change accordingly, thereby adjusting the blowing width of the lip blowing port 23.

[0052] The gap 29 is used for the movement of the closed elastic steel belt 21. The gap 29 itself does not allow air to pass through. Instead, the gas is blown into the air knife lip cavity 28 through the inner cavity 18 of the air knife body and the part of the gap 29 that is not blocked by the closed elastic steel belt 21. The closed elastic steel belt 21 prevents the air flow from flowing outward, ensuring that the air flow can only flow from the inside to the outside through the middle part that is not blocked by the closed structure, and blown out through the lip blowing port 23. The triangular closed copper block 19 runs horizontally between the upper air knife lip 14 and the lower air knife lip 15, driven by the closed elastic steel belt 21. The triangular closed copper block 19 prevents the air flow from flowing from the middle part that is not blocked by the closed structure to the air knife lip cavity 28 on both sides, performing longitudinal sealing. At the same time, the triangular closed copper block 19 ensures the stable operation of the closed elastic steel belt 21.

[0053] The air knife lip inner cavity 28 is an inner cavity formed by the air knife upper lip 14 and the air knife lower lip 15, and its cross section is a triangle that is narrow in front and wide in the back. The cross section of the triangular closed copper block 19 matches the cross section of the air knife lip inner cavity 28.

[0054] The specific installation method of the closing mechanism is as follows:

[0055] After the tail end of the closed elastic steel band 21 extends out of the air knife end plate elastic steel band cutout 17 of the air knife body end plate 16, the closed elastic steel band 21 is tightened, and the triangular closed copper block 19 and the closed copper block tail joint 20 are bolted to the front and rear sides of the closed elastic steel band tail joint 22. The closed structure is installed horizontally within the air knife outlet cavity: the triangular closed copper block 19 is located in the air knife lip cavity 28, the closed elastic steel band 21 is located in the gap 29, and the closed copper block tail joint 20 is located in the air knife body cavity 18. The closed elastic steel band 21, the triangular closed copper block 19, and the closed copper block tail joint 20 form a T-shape.

[0056] A method for adjusting the lip width of an air knife used in hot-dip galvanized sheet production equipment adopts the above-mentioned air knife lip blowing width adjustment device used in hot-dip galvanized sheet production equipment, and the specific steps are as follows:

[0057] ① Start the power supply and computer control system, and run the servo motor on the air knife beam forward and reverse according to the computer instructions;

[0058] ② The servo motor on the air knife beam drives the universal joint 1 to run forward and reverse, and the universal joint 1 drives the driving wheel core shaft 2 connected thereto and the driving wheel gear 4 on the driving wheel core shaft 2 to run forward and reverse, and the driving wheel gear 4 drives the driven wheel gear plate 8 meshing therewith to run forward and reverse, and the driven wheel gear plate 8 drives the closed elastic steel belt seat 9 to run forward and reverse;

[0059] ③ When the closed elastic steel belt seat 9 moves forward and backward, the closed elastic steel belt 21 moves back and forth along the gap 29, and at the same time drives the triangular closed copper block 19 and the closed copper block tail joint 20 to move back and forth along the air knife lip cavity 28 and the air knife body cavity 18 respectively. The closed elastic steel belt 21 transversely seals the air knife body cavity 18 it passes through, and the triangular closed copper block 19 longitudinally seals the air knife lip cavity 28;

[0060] ④ As the sealing mechanism moves back and forth laterally in the air outlet cavity of the air knife, the width of the sealing mechanism blocking the inner cavity 18 of the air knife body will change accordingly, and the air flow output from the inner cavity 18 of the air knife body will also change accordingly, thereby adjusting the blowing width of the knife lip blowing port 23, and the air flow is ejected through the knife lip blowing port 23, blowing towards the zinc plate, and scraping the zinc liquid on the zinc plate.

[0061] The main methods of use and operation of the present invention are:

[0062] Start the power supply and the computer control system. The computer instructs the servo motor on the air knife beam to run forward and reverse as needed. The servo motor drives the universal joint 1 to run forward and reverse. The universal joint 1 drives the driving wheel core shaft 2 connected to it and the driving wheel gear 4 at the lower end of the driving wheel core shaft 2 to run forward and reverse. The driving wheel gear 4 pushes the driven wheel gear plate 8 engaged with it to run forward and reverse. The driven wheel gear plate 8 drives the closed elastic steel belt seat 9 engaged with it to run forward and reverse. A closed elastic steel belt 21 is wound around the annular groove of the closed elastic steel belt seat 9. The closed elastic steel belt 21 itself is elastic. When the driven wheel gear plate 8 runs forward and reverse, its elastic tensioning effect flexibly drives the triangular closed copper block 19 and the closed copper block tail joint 20 connected to it to run back and forth horizontally. The air knife's elastic sealing steel strip 21 is vertically mounted within the gap 29, sealing the transverse connection between the air knife's inner cavity 18 and the air knife's lip cavity 28. A triangular-shaped sealing copper block 19 also seals the longitudinal connection between the air knife's inner cavity 18 and the air knife's lip cavity 28. As the elastic sealing steel strip 21 reciprocates laterally, it pulls the triangular-shaped sealing copper block 19 back and forth, causing the width of its sealing to change accordingly. The airflow delivered by the air knife's inner cavity 18 also changes in width, and is ejected through the lip's air outlet 23, blowing toward the zinc sheet and scraping away the zinc liquid. The innovative use of this invention allows the air knife to adjust the air knife's air outlet width in response to changes in the width of the zinc sheet being produced. The symmetrical air knife lip width adjustment devices, located on the end plates of the air knife body, adjust the air knife's air outlet width to match the desired width. This achieves multi-purpose use of a single machine, improves equipment utilization, reduces fixed asset usage, and lowers production costs. It has been calculated that this can increase the company's economic benefits by approximately 6%.

Claims

1. An air knife lip blowing width adjustment device for hot-dip galvanized sheet production equipment, characterized by: It comprises a driving mechanism and a closing mechanism, wherein the driving mechanism drives the closing mechanism to move back and forth laterally in the air knife outlet cavity; the driving mechanism and the closing mechanism are two groups, and the two groups of driving mechanisms and closing mechanisms have the same structure and are respectively arranged on the air knife body end plates (16) on both sides of the air knife body (24); The closing mechanism comprises a closing elastic steel strip (21), a triangular closing copper block (19) and a closing copper block tail joint (20); the driving mechanism is drivingly connected to the head end of the closing elastic steel strip (21); and the front and rear sides of the tail end of the closing elastic steel strip (21) are respectively connected to the triangular closing copper block (19) and the closing copper block tail joint (20); The air knife air outlet cavity comprises an air knife lip cavity (28) and an air knife body inner cavity (18) arranged in front and back, the air knife lip cavity (28) and the air knife body inner cavity (18) are connected through a gap (29), and the front end of the air knife lip cavity (28) is a lip air blowing port (23); The triangular closed copper block (19) is located in the air knife lip cavity (28), the closed elastic steel strip (21) is located in the gap (29), and the closed copper block tail joint (20) is located in the air knife body cavity (18). The driving mechanism drives the closed elastic steel strip (21) to move back and forth laterally along the gap (29), and at the same time drives the triangular closed copper block (19) and the closed copper block tail joint (20) to move back and forth laterally along the air knife lip cavity (28) and the air knife body cavity (18) respectively. The width of the closed elastic steel strip (21) is greater than the width of the air knife lip cavity (28) and the air knife body cavity (18). The height of the air knife body cavity (18); when the closed elastic steel belt (21) moves back and forth laterally in the gap (29), the air knife body cavity (18) it passes through is laterally closed, and the triangular closed copper block (19) longitudinally closes the air knife lip cavity (28); as the closing mechanism moves back and forth laterally in the air knife outlet cavity, the width of the closing mechanism blocking the air knife body cavity (18) will change accordingly, and the air flow output from the air knife body cavity (18) will also change accordingly, thereby adjusting the blowing width of the lip blowing port (23).

2. The device for adjusting the air knife lip blowing width of hot-dip galvanized sheet production equipment according to claim 1, characterized in that: The driving mechanism comprises a driving wheel device and a driven wheel device, and both the driving wheel device and the driven wheel device are mounted on an air knife body end plate (16) on a side of the air knife body (24); The driving wheel device comprises a driving wheel core shaft (2), a driving wheel gear (4), an adjustment device upper cover (5) and a driving wheel device outer shield (25); the upper end of the driving wheel core shaft (2) is connected to the servo motor on the air knife beam through a universal joint (1); the lower end of the driving wheel core shaft (2) extends into the driving wheel device outer shield (25) through the adjustment device upper cover (5) and is provided with a driving wheel gear (4); The driven wheel device comprises a driven wheel core shaft (7), a driven wheel toothed disc (8), a closed elastic steel belt seat (9), a closed elastic steel belt interface (10) and a driven wheel device outer shield (26), the driving wheel device outer shield (25) is connected to the driven wheel device outer shield (26) up and down, the driven wheel core shaft (7) passes through the driven wheel device outer shield (26), a driven wheel toothed disc (8) is rotatably provided on the driven wheel core shaft (7), and the driven wheel toothed disc (8) is meshed with the driving wheel gear (4); a closed elastic steel belt seat (9) is provided in the driven wheel device outer shield (26), an annular groove (32) is provided at the outer edge of the closed elastic steel belt seat (9), and the driving wheel device outer shield (25) is provided with a groove that is aligned with the annular groove. The annular groove 1 (32) is tangent to the groove 2 (33), and the annular groove 1 (32) and the groove 2 (33) are connected; the driven wheel gear disc (8) is arranged on the upper end surface of the closed elastic steel belt seat (9) and is connected thereto, and a closed elastic steel belt interface (10) is provided at the outer edge of the closed elastic steel belt seat (9), and a closed elastic steel belt joint (13) is provided at the head end of the closed elastic steel belt (21), and the closed elastic steel belt joint (13) is fixed to the closed elastic steel belt interface (10) by bolts, and the closed elastic steel belt (21) is surrounded by the annular groove 1, and after extending from the groove 2 outside the outer shield (25) of the driving wheel device, it enters the gap (29) through the air knife end plate elastic belt steel cut (17) of the air knife body end plate (16).

3. The device for adjusting the air knife lip blowing width of hot-dip galvanized sheet production equipment according to claim 2, characterized in that: The upper end surface of the outer shield (25) of the driving wheel device is an upper cover (5) of the adjusting device. An upper connector (6) of the adjusting device is provided on one side of the upper end surface of the upper cover (5). A plurality of circular locking rods (30) are transversely provided on the upper connector (6) of the adjusting device, and are respectively locked and docked with matching circular holes on the end plate (16) of the air knife body. A driven wheel base (11) is provided at the lower end of the outer shield (26) of the driven wheel device, the upper end of the driven wheel core shaft (7) is provided on the upper cover (5) of the adjustment device, the lower end of the driven wheel core shaft (7) is provided on the driven wheel base (11), and an adjustment device lower connector (12) is provided on the side of the driven wheel base (11), and a plurality of circular locking rods (31) are transversely provided on the adjustment device lower connector (12), which are respectively locked and docked with two matching circular holes on the end plate (16) of the air knife body; an adjustment device lower shield (27) is provided below the driven wheel base (11), and the adjustment device lower shield (27) covers the adjustment device lower connector (12).

4. The device for adjusting the air knife lip blowing width of hot-dip galvanized sheet production equipment according to claim 1 or 2, characterized in that: The air knife lip inner cavity (28) is an inner cavity formed by the air knife upper lip (14) and the air knife lower lip (15), and its cross section is a triangle that is narrow in front and wide in the back. The cross section of the triangular closed copper block (19) matches the cross section of the air knife lip inner cavity (28).

5. The device for adjusting the air knife lip blowing width of hot-dip galvanized sheet production equipment according to claim 1 or 2, characterized in that: The tail end of the closed elastic steel strip (21) is provided with a closed elastic steel strip tail joint (22), and the triangular closed copper block (19) and the closed copper block tail joint (20) are respectively fixed to the front and rear sides of the closed elastic steel strip tail joint (22) by bolts.

6. The device for adjusting the air knife lip blowing width of hot-dip galvanized sheet production equipment according to claim 3, characterized in that: A driving wheel fixing sleeve (3) is provided at the driving wheel core shaft (2); the upper end of the driving wheel fixing sleeve (3) is provided on the universal joint (1) via flange 1, and the lower end of the driving wheel fixing sleeve (3) is connected to the upper cover (5) of the adjustment device via flange 3.

7. A method for adjusting the lip width of an air knife used in hot-dip galvanized sheet production equipment, using the device for adjusting the lip width of an air knife used in hot-dip galvanized sheet production equipment according to any one of claims 2 to 6, characterized in that The specific steps are as follows: ① Start the power supply and computer control system, and run the servo motor on the air knife beam forward and reverse according to the computer instructions; ② The servo motor on the air knife beam drives the universal joint (1) to run forward and reverse, the universal joint (1) drives the driving wheel core shaft (2) connected thereto and the driving wheel gear (4) on the driving wheel core shaft (2) to run forward and reverse, the driving wheel gear (4) drives the driven wheel gear (8) meshed therewith to run forward and reverse, and the driven wheel gear (8) drives the closed elastic steel belt seat (9) to run forward and reverse; ③ When the closed elastic steel belt seat (9) moves forward and backward, the closed elastic steel belt (21) moves back and forth along the gap (29), and at the same time drives the triangular closed copper block (19) and the closed copper block tail joint (20) to move back and forth along the air knife lip cavity (28) and the air knife body inner cavity (18) respectively, and the closed elastic steel belt (21) performs a transverse sealing on the air knife body inner cavity (18) through which it passes, and the triangular closed copper block (19) performs a longitudinal sealing on the air knife lip cavity (28); ④ As the sealing mechanism moves back and forth laterally in the air outlet cavity of the air knife, the width of the sealing mechanism blocking the cavity (18) of the air knife body will change accordingly, and the air flow output from the cavity (18) of the air knife body will also change accordingly, thereby adjusting the air blowing width of the knife lip air blowing port (23). The air flow is ejected through the knife lip air blowing port (23) and blows toward the zinc plate, blowing and scraping the zinc liquid on the zinc plate.

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