Hot air blowing device for metal strip

Abstract

The invention discloses a hot air blowing device for metal strips, and particularly relates to the technical field of metal strip processing, the hot air blowing device comprises a hot air device, a blowing device for blowing the metal strips and a hot air recovery device for recovering hot air, the hot air device is used for providing hot air for the blowing device, the hot air device is used for providing hot air for the blowing device, and the hot air recovery device is used for recovering hot air. Before entering the air knife through the blowing pipe, hot air can guide air and drive the wind wheel in the air knife to rotate at a high speed, and then the rotating rod and the cam are driven to rotate, so that the rolling wheel impacts the metal strip at a high frequency, the metal strip vibrates, and the air knife is assisted in blowing away impurities, water and the like on the outer surface of the metal strip; and the rotating rods, the cams and the rollers are arranged above and below the metal strip, so that the metal strip part is in a wave shape in the process that the upper roller and the lower roller impact the metal strip, impurities and water on the metal strip can be better helped to be shaken off, and the hot air blowing effect of the metal strip is improved.

Description

Technical Field

[0001] The invention relates to the field of metal strip processing, and in particular to a hot air blowing device for metal strips. Background Art

[0002] When metal strips are rolled, rolling oil is usually used to reduce the friction between metals, which results in serious oil on the upper and lower surfaces of the strips. Hot air blowing is required to remove the surface rolling oil to prevent oil spots from appearing on the surface after annealing, which affects product quality. In the process of hot air blowing of metal strips, the air is generally heated to a certain temperature, and then a high-speed airflow is generated by a fan and other equipment to spray the hot air onto the surface of the metal strip. Most of the existing technologies only directly blow hot air on the metal strip, and some use mechanical cleaning methods. Therefore, it is difficult to use traditional methods to clean the metal strip by mechanical methods while blowing hot air, and it is difficult to recover the waste heat of the hot air after it is sprayed. Summary of the invention

[0003] The object of the present invention is to provide a hot air blowing device for metal strips to solve the above-mentioned deficiencies in the technology.

[0004] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: a hot air blowing device for metal strips, comprising a hot air device, a blowing device for blowing the metal strips, and a hot air recovery device for recovering the hot air, wherein the hot air device is used to provide hot air for the blowing device; The purge device comprises a support platform, support frames are fixed on both sides of the top of the support platform, columns are arranged inside the two support frames, the bottom of the column is slidably connected to the support frame through a slide rail, and the top of the column is connected to the support frame through a locking piece; Two rows of wind knives for blowing metal strips are arranged between the two columns, and an angle adjustment mechanism for adjusting the blowing angle of the wind knives is arranged between the wind knives and the columns; A blow pipe is fixed to one side of one of the support frames, the air inlet of the air knife is connected to the blow pipe through a pipeline, and one end of the blow pipe is connected to the air outlet of the purge device through a pipeline; The hot air recovery device includes an air intake box, which is fixed at the front end of the support frame. The air outlet direction of the wind knife is toward the air intake box. The interior of the air intake box is hollow, and air intake holes are provided on the upper and lower sides of the interior of the air intake box. The bottom of the air intake box is connected to the air inlet of the hot air device through a connecting filter assembly.

[0005] Preferably, the hot air device comprises a controller and a support plate, an outer box, a fan and a guide cover are fixed on the top of the support plate, and one side of the guide cover is connected to the air outlet of the fan; The inner box is fixed inside the outer box, and two rows of electric heating tubes for heating air are installed in the inner box from top to bottom. A rectangular connecting tube is connected between the inner box and the air guide cover, and an air outlet pipe is connected to one side of the inner box above the rectangular connecting tube, and both the air outlet pipe and the rectangular connecting tube pass through the outer box; The air outlet pipe is connected with the blowing pipe through a pipeline; The controller is installed outside the outer box.

[0006] Preferably, universal self-locking wheels are installed at the bottom of the support plate near its four corners, and a partition is fixed on one side of the interior of the inner box between the two rows of electric heating tubes, and the side on which the partition is fixed to the inner box is close to the position between the air outlet pipe and the rectangular connecting tube. During the use of the hot air device, the fan and the electric heating tube are turned on at the same time by the controller, the fan will suck in air and send the air into the inner box through the air guide cover and the rectangular connecting tube, and then the air in the inner box will be heated by the electric heating tube, and then sent to the blowing pipe through the air outlet pipe and the pipeline, so as to provide hot air for the blowing device.

[0007] Preferably, a cover plate is provided on the top of the two support frames, and the cover plate is rotatably connected to one of the support frames via a hinge.

[0008] Preferably, the locking member includes a screw, which is fixed on the top of the column, and a limiting hole is opened on the top of the support frame along its length direction, and the screw passes through the limiting hole. The width of the limiting hole matches the diameter of the screw, and the outside of the screw is threadedly connected with a nut at the top of the support frame.

[0009] Preferably, the angle adjustment mechanism comprises a connecting block and a fixing rod, the connecting block is fixed to the back of the wind knife, fixing rings are fixed on both sides of the connecting block, the fixing rod passes through the connecting block and the fixing rings on both sides thereof, the connecting block is rotatably connected to the fixing rod through a bearing, fixing plates are fixed on both ends of the fixing rod, and the fixing plate is fixedly connected to the column by bolts; The fixed rod is provided with a slidable movable ring, a limit block is fixed inside the movable ring, a limit groove for the limit block to move is opened on the outer wall of the fixed rod, and a spring is sleeved on the outside of the fixed rod between the fixed plate and the movable ring; A plurality of clamping blocks are arranged in a ring array on one side of the fixed ring facing the movable ring, and a clamping groove matching the plurality of clamping blocks is arranged on one side of the movable ring facing the fixed ring; The fixing ring and the clamping block are an integrated structure.

[0010] Preferably, the connection and filtering assembly comprises an air guide pipe and a connection tube, a threaded ring is fixed on the outside of the air inlet of the fan, the connection tube is threadedly connected to the threaded ring, a connection cover is connected to the side of the connection tube opposite to the threaded ring, the air guide pipe is connected between the connection cover and the air inlet box, a clamping plate is fixed inside the connection tube, a placement groove is opened inside the clamping plate, and a filter element for filtering waste heat air is installed inside the placement groove; A shield is arranged outside the support frame.

[0011] Preferably, the blowing pipe is provided with a vibration mechanism for striking and vibrating the metal strip; The vibration mechanism includes two air guide cylinders, a connecting square tube is connected between the two air guide cylinders, and a connecting frame is connected to the back side of the two air guide cylinders, the connecting frame is connected to the blowing pipe, a wind wheel is installed inside the air guide cylinder, a rotating rod is connected to one side of the wind wheel, and two cams are fixed on the rotating rod.

[0012] Preferably, a roller is mounted on the raised side of the cam via a bearing, and the connecting frame transitions from a circular shape to a rectangular shape from one end to the other end.

[0013] Preferably, a fixing block is fixed to the outside of the support frame, and the rotating rod is rotatably connected to the fixing block via a bearing.

[0014] In the above technical solution, the technical effects and advantages provided by the present invention are: The hot air device provides hot air for the blowing device. Before the hot air enters the wind knife through the blowing pipe, it will pass through the air guide and drive the wind wheel inside it to rotate at a high speed, thereby driving the rotating rod and the cam to rotate, so that the roller hits the metal strip at a "high frequency" to make the metal strip vibrate, thereby assisting the wind knife to blow away impurities and moisture on the outer surface of the metal strip. Rotating rods, cams and rollers are arranged above and below the metal strip. Therefore, during the collision process between the upper and lower rollers, the metal strip part will present a "wave shape", which is more conducive to assisting in "shaking off" the impurities and moisture on the metal strip, thereby improving the hot air blowing effect of the metal strip; Through the hot air recovery device, after the hot air is sprayed toward the metal strip through the wind knife, the suction force generated by the air inlet end of the fan will be transmitted to the air inlet box through the connecting tube, air guide pipe and connecting cover. Therefore, after the hot air is sprayed, some of the "waste heat air" that still has temperature will enter the air inlet box from the air inlet hole, and then be heated again by the hot air device. Therefore, the air will be heated and heated by the heating device again more quickly, which greatly improves the energy utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is one of the structural schematic diagrams of the whole invention; Figure 2 The second schematic diagram of the overall structure of the present invention; Figure 3 It is a structural schematic diagram of the connection filter assembly of the present invention; Figure 4 It is a schematic diagram of the structure after the cover plate of the present invention is covered on the support frame; Figure 5 This is an appearance diagram of the hot air device of the present invention; Figure 6 It is a schematic diagram of the structure of the hot air device after the outer box body of the present invention is opened; Figure 7 It is a cross-sectional view of the inner box and the air guide cover of the present invention; Figure 8 This is a schematic diagram of the structure of the purge device after the cover plate is opened according to the present invention; Fig. 9 It is a structural schematic diagram of the connection between the column and the support frame of the present invention; Fig.10 It is a structural schematic diagram of the present invention when the fixing plate is connected to the fixing rod; Fig.11 It is a cross-sectional view of the fixed ring and the movable ring of the present invention when they are connected; Fig.12 for Fig.11 A magnified view of part A in FIG. Fig.13 It is a schematic diagram of the structure after the fixed ring and the movable ring of the present invention are separated; Fig.14 It is a schematic diagram of the overall structure of the blowing pipe and the air guide cylinder of the present invention; Fig.15 It is a side view of the gas guide cylinder of the present invention; Fig.16 is a cross-sectional view of the gas guide cylinder of the present invention; Fig.17 It is a structural schematic diagram of the fixing block of the present invention.

[0017] Description of reference numerals: 1. Hot air device; 2. Purge device; 3. Support plate; 4. Outer box; 5. Fan; 6. Air guide cover; 7. Controller; 8. Exhaust pipe; 9. Inner box; 10. Rectangular connecting pipe; 11. Partition; 12. Electric heating pipe; 13. Support platform; 14. Cover plate; 15. Blowing pipe; 16. Support frame; 17. Column; 18. Screw; 19. Nut; 20. Limiting hole; 21. Fixing plate; 22. Connecting block; 23. Wind knife; 24. Fixing ring; 25. Movable Ring; 26, spring; 27, fixing rod; 28, slot; 29, block; 30, limit slot; 31, limit block; 32, air guide tube; 33, rotating rod; 34, cam; 35, roller; 36, connecting frame; 37, connecting square tube; 38, wind wheel; 39, fixing block; 40, air intake box; 41, shield; 42, air guide tube; 43, connecting cover; 44, connecting tube; 45, air inlet hole; 46, card plate; 47, placement slot; 48, filter element; 49, threaded ring. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0019] The present invention provides Figure 1-Figure 17 A hot air blowing device for metal strips shown includes a hot air device 1, a blowing device 2 for blowing metal strips, and a hot air recovery device for recovering hot air, wherein the hot air device 1 is used to provide hot air for the blowing device 2; The purge device 2 includes a support platform 13, support frames 16 are fixed on both sides of the top of the support platform 13, and columns 17 are arranged inside the two support frames 16. The bottom of the column 17 is slidably connected to the support frame 16 through a slide rail, and the top of the column 17 is connected to the support frame 16 through a locking piece. Two rows of wind knives 23 for blowing metal strips are arranged between the two columns 17, and an angle adjustment mechanism for adjusting the spraying angle of the wind knives 23 is arranged between the wind knives 23 and the columns 17; A blow pipe 15 is fixed to one side of one of the support frames 16, the air inlet of the air knife 23 is connected to the blow pipe 15 through a pipeline, and one end of the blow pipe 15 is connected to the air outlet of the purge device 2 through a pipeline; The hot air recovery device includes an air intake box 40, which is fixed at the front end of the support frame 16. The air outlet direction of the wind knife 23 is toward the air intake box 40. The interior of the air intake box 40 is hollow, and air intake holes 45 are provided on the upper and lower sides of the interior of the air intake box 40. The bottom of the air intake box 40 is connected to the air inlet of the hot air device 1 through a connecting filter assembly.

[0020] Furthermore, the hot air device 1 includes a controller 7 and a support plate 3, an outer box 4, a fan 5 and a guide cover 6 are fixed on the top of the support plate 3, and one side of the guide cover 6 is connected to the air outlet of the fan 5; An inner box 9 is fixed inside the outer box 4, and two rows of electric heating tubes 12 for heating air are installed in the inner box 9 from top to bottom. A rectangular connecting pipe 10 is connected between the inner box 9 and the air guide cover 6, and an air outlet pipe 8 is connected to one side of the inner box 9 above the rectangular connecting pipe 10. The air outlet pipe 8 and the rectangular connecting pipe 10 both penetrate the outer box 4; The air outlet pipe 8 is connected to the blowing pipe 15 through a pipeline; The controller 7 is installed outside the outer box 4 .

[0021] Furthermore, universal self-locking wheels are installed at the bottom of the support plate 3 near its four corners. A partition 11 is fixed on one side of the inner part of the inner box 9 between two rows of electric heating tubes 12. The side on which the partition 11 is fixed to the inner box 9 is close to the position between the air outlet pipe 8 and the rectangular connecting pipe 10. During the use of the hot air device 1, the fan 5 and the electric heating tube 12 are turned on at the same time by the controller 7. The fan 5 will inhale air and send the air into the inner box 9 through the air guide cover 6 and the rectangular connecting tube 10. Then the air in the inner box 9 will be heated by the electric heating tube 12, and then sent to the blowing pipe through the air outlet pipe 8 and the pipeline. 15, hot air is provided for the purge device 2, and after the air enters the inner box 9 through the rectangular connecting tube 10, the partition 11 will separate the upper and lower rows of electric heating tubes 12 in the inner box 9, thereby extending the time the air passes through the inner box 9 to further improve the heating effect of the air. The present invention only shows the role of two rows of electric heating tubes 12 and a partition 11. If multiple rows of electric heating tubes 12 and multiple partitions 11 are coordinated, the partitions 11 are staggered, allowing the airflow to follow an "S"-shaped path when entering the inner box 9, which can further extend the heating time of the air in the inner box 9. The details are not repeated here.

[0022] Furthermore, a cover plate 14 is disposed on the top of the two support frames 16 , and the cover plate 14 is rotatably connected to one of the support frames 16 via a hinge.

[0023] Furthermore, the locking member includes a screw 18, which is fixed on the top of the column 17. A limiting hole 20 is provided on the top of the support frame 16 along its length direction. The screw 18 passes through the limiting hole 20. The width of the limiting hole 20 matches the diameter of the screw 18. The outside of the screw 18 is located at the top of the support frame 16 and is threadedly connected with a nut 19. Since the column 17 and the support frame 16 are slidably connected via a slide rail, the position of the column 17 on the support frame 16 can be directly and quickly adjusted. After the position of the column 17 on the support frame 16 is determined, the nut 19 is rotated to move the nut 19 toward the support frame 16, so that the column 17 can be locked to improve the stability of the column 17.

[0024] Reference Figure 8-Figure 13 The angle adjustment mechanism includes a connecting block 22 and a fixing rod 27. The connecting block 22 is fixed to the back of the wind knife 23. The fixing rings 24 are fixed on both sides of the connecting block 22. The fixing rod 27 passes through the connecting block 22 and the fixing rings 24 on both sides. The connecting block 22 is rotatably connected to the fixing rod 27 through a bearing. The two ends of the fixing rod 27 are fixed with fixing plates 21. The fixing plate 21 is fixedly connected to the column 17 by bolts. A slidable movable ring 25 is provided on the fixed rod 27, a limit block 31 is fixed inside the movable ring 25, a limit groove 30 for the limit block 31 to move is provided on the outer wall of the fixed rod 27, and a spring 26 is sleeved on the outer part of the fixed rod 27 between the fixed plate 21 and the movable ring 25; A plurality of blocks 29 are arranged in a circular array on one side of the fixed ring 24 facing the movable ring 25, and a slot 28 matching the plurality of blocks 29 is arranged on the side of the movable ring 25 facing the fixed ring 24. When adjusting the angle of the wind knife 23, the movable ring 25 can be moved toward the direction of the fixed plate 21 to pull the blocks 29 out of the slot 28, and then the connecting block 22 and the wind knife 23 are directly rotated as a whole to adjust the air outlet angle of the wind knife 23. After the adjustment is completed, the movable ring 25 is released, and under the action of the spring 26, the movable ring 25 will move toward the direction of the fixed ring 24, so that the blocks 29 will re-enter the slot 28, and the wind knife 23 will be adjusted. The wind knife 23 after the angle adjustment is locked, and the block 29 and the slot 28 are used to ensure that the movable ring 25 can only move along the fixed rod 27 but cannot rotate around the fixed rod 27. The greater the density of the blocks 29 and the slots 28 in the present invention, the greater the precision of the adjustment angle. For example, if there are only eight blocks 29 and slots 28, then 360 / 8=40, that is, the minimum adjustment angle of the wind knife 23 is 40 degrees. If there are 36 blocks 29 and slots 28, then 360 / 36=10, and the minimum adjustment angle of the wind knife 23 is 10 degrees. And so on, depending on the actual needs; The fixing ring 24 and the clamping block 29 are an integrated structure.

[0025] Reference Figure 1-Figure 3 As shown, the connection and filtering assembly includes an air guide pipe 42 and a connection tube 44. A threaded ring 49 is fixed to the outside of the air inlet of the fan 5. The connection tube 44 is threadedly connected to the threaded ring 49. A connection cover 43 is connected to the side of the connection tube 44 opposite to the threaded ring 49. The air guide pipe 42 is connected between the connection cover 43 and the air inlet box 40. A clamping plate 46 is fixed inside the connection tube 44. A placement groove 47 is provided inside the clamping plate 46. A filter element 48 for filtering waste heat air is installed inside the placement groove 47. A shield 41 is disposed outside the support frame 16 , and the shield 41 can prevent external airflow from interfering with the blowing operation of the wind knife 23 on the metal strip from the side of the support frame 16 .

[0026] After the hot air is sprayed toward the metal strip through the wind knife 23, the suction force generated by the air inlet end of the fan 4 is conducted to the air inlet box 40 through the connecting tube 44, the air guide pipe 42 and the connecting cover 43. Therefore, after the hot air is sprayed, part of the "residual heat air" that still has temperature will enter the air inlet box 40 from the air inlet hole 45, and then be heated again by the hot air device. Therefore, when the air is heated by the heating device again, the temperature will rise more quickly, which greatly improves the energy utilization efficiency. After the "waste heat air" enters the interior of the connecting tube 44 through the air duct 42 and the connecting cover 43, the "waste heat air" will be filtered by the filter element 48 and then enter the hot air device. Therefore, the cleanliness of the wind knife 23 when spraying hot air can be improved. After the device has been working for a period of time, the air duct 42 can be opened to replace the filter element 48 (the filter element 48 can use a common square filter element. After the filter element 48 is placed in the placement groove 47, the frame of the filter element 48 is fixed to the card plate 46 by bolts, which is not shown in the figure. This is a conventional solution and will not be elaborated here).

[0027] Reference Figure 14-17 , a vibrating mechanism for striking and vibrating the metal strip is installed on the blowing pipe 15; The vibration mechanism includes two air guide cylinders 32, a connecting square tube 37 is connected between the two air guide cylinders 32, and a connecting frame 36 is connected to the back side of the two air guide cylinders 32, the connecting frame 36 is connected to the blowing pipe 15, a wind wheel 38 is installed inside the air guide cylinder 32, a rotating rod 33 is connected to one side of the wind wheel 38, and two cams 34 are fixed on the rotating rod 33.

[0028] Specifically, a roller 35 is installed on the raised side of the cam 34 through a bearing, and the connecting frame 36 transitions from a circular shape at one end to a rectangular shape at the other end to ensure that the hot air inside the blowing pipe 15 can completely enter the air guide cylinder 32. When the hot air enters the air guide cylinder 32, the wind direction of the hot air is tangent to the wind wheel 38, thereby driving the wind wheel 38 to rotate at high speed.

[0029] Specifically, a fixing block 39 is fixed to the outside of the support frame 16, and the rotating rod 33 is rotatably connected to the fixing block 39 via a bearing. The support frame 16 can be used to support the rotating rod 33 to improve the stability of the rotating rod 33 during rotation.

[0030] The overall working principle of the above scheme is as follows: When in use, the blowing device 2 is placed between two "conveyors" for conveying metal strips in the factory, and the metal strip is passed between the "upper and lower" wind knives 23 of the blowing device 2 (it is best to let the metal strip pass through the "upper and lower" wind knives 23 in mid-air, and try not to contact the wind knives 23 to avoid the wind knives 23 causing wear on the metal strip); Then, the controller 7 turns on the fan 5 and the electric heating tube 12 at the same time, and the fan 5 sucks in the air and sends the air into the inner box 9 through the air guide cover 6 and the rectangular connecting tube 10. Then, the air in the inner box 9 is heated by the electric heating tube 12, and then sent to the blowing tube 15 through the air outlet pipe 8 and the pipeline to provide hot air for the purge device 2. The hot air inside the blowing pipe 15 will pass through the air guide cylinder 32 before the wind knife 23 and drive the wind wheel 38 inside it to rotate at a high speed. When the wind wheel 38 rotates, it will synchronously drive the rotating rod 33 to rotate. During the rotation of the rotating rod 33, the cam 34 on it will also rotate with the rotating rod 33, thereby driving the roller 35 to "high frequency" hit the metal strip, causing the metal strip to vibrate, thereby assisting the wind knife 23 to blow away impurities and moisture on the outer surface of the metal strip (because the roller 35 is rotatable, the wear on the metal strip during the impact is small and can be ignored). The rotating rod 33, the cam 34 and the roller 35 are arranged above and below the metal strip. Therefore, during the collision of the upper and lower rollers 35, the metal strip part will present a "wave shape", which is more conducive to assisting in "shaking off" the impurities and moisture on the metal strip, thereby improving the hot air blowing effect of the metal strip; After the hot air is sprayed toward the metal strip through the wind knife 23, the suction force generated by the air inlet end of the fan 4 will be transmitted to the air inlet box 40 through the connecting tube 44, the air guide pipe 42 and the connecting cover 43. Therefore, after the hot air is sprayed, some of the "residual heat air" that still has temperature will enter the air inlet box 40 from the air inlet hole 45, and then be heated again by the hot air device. Therefore, the air will be heated and heated by the heating device again more quickly, which greatly improves the energy utilization efficiency.

[0031] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A hot air blowing device for metal strips, characterized in that: It comprises a hot air device (1), a blowing device (2) for blowing metal strips, and a hot air recovery device for recovering hot air, wherein the hot air device (1) is used to provide hot air for the blowing device (2); The purging device (2) comprises a support platform (13), support frames (16) are fixed on both sides of the top of the support platform (13), and columns (17) are arranged inside the two support frames (16), the bottom of the column (17) is slidably connected to the support frame (16) via a slide rail, and the top of the column (17) is connected to the support frame (16) via a locking piece; Two rows of wind knives (23) for blowing the metal strip are arranged above and below the two upright posts (17), and an angle adjustment mechanism for adjusting the blowing angle of the wind knives (23) is arranged between the wind knives (23) and the upright posts (17); A blow pipe (15) is fixed to one side of one of the support frames (16); an air inlet of the air knife (23) is connected to the blow pipe (15) via a pipeline; and one end of the blow pipe (15) is connected to an air outlet of the purge device (2) via a pipeline; The hot air recovery device comprises an air intake box (40), wherein the air intake box (40) is fixed to the front end of the support frame (16), the air outlet direction of the air knife (23) is toward the air intake box (40), the interior of the air intake box (40) is hollow, and air intake holes (45) are provided on both the upper and lower sides of the interior of the air intake box (40), and the bottom of the air intake box (40) is connected to the air intake port of the hot air device (1) through a connection filter assembly.

2. A hot air blowing device for metal strip according to claim 1, characterized in that: The hot air device (1) comprises a controller (7) and a support plate (3); an outer box (4), a fan (5) and a shroud (6) are fixed on the top of the support plate (3); one side of the shroud (6) is connected to the air outlet of the fan (5); An inner box (9) is fixed inside the outer box (4), two rows of electric heating tubes (12) for heating air are installed in the upper and lower parts of the inner box (9), a rectangular connecting tube (10) is connected between the inner box (9) and the air guide cover (6), an air outlet pipe (8) is connected to one side of the inner box (9) above the rectangular connecting tube (10), and the air outlet pipe (8) and the rectangular connecting tube (10) both penetrate the outer box (4); The air outlet pipe (8) is connected to the blowing pipe (15) through a pipeline; The controller (7) is installed outside the outer box (4).

3. A hot air blowing device for metal strip according to claim 2, characterized in that: Universal self-locking wheels are installed at the bottom of the support plate (3) near its four corners, and a partition (11) is fixed between two rows of electric heating tubes (12) on one side of the inner box (9), and the side where the partition (11) is fixed to the inner box (9) is close to the position between the air outlet pipe (8) and the rectangular connecting pipe (10).

4. A hot air blowing device for metal strip according to claim 1, characterized in that: A cover plate (14) is provided on the top of the two support frames (16), and the cover plate (14) is rotatably connected to one of the support frames (16) via a hinge.

5. A hot air blowing device for metal strip according to claim 1, characterized in that: The locking member comprises a screw (18), wherein the screw (18) is fixed to the top of the column (17), a limiting hole (20) is provided at the top of the support frame (16) along its length direction, the screw (18) passes through the limiting hole (20), the width of the limiting hole (20) matches the diameter of the screw (18), and a nut (19) is threadedly connected to the outside of the screw (18) at the top of the support frame (16).

6. A hot air blowing device for metal strip according to claim 1, characterized in that: The angle adjustment mechanism comprises a connecting block (22) and a fixing rod (27); the connecting block (22) is fixed to the back of the wind knife (23); fixing rings (24) are fixed on both sides of the connecting block (22); the fixing rod (27) passes through the connecting block (22) and the fixing rings (24) on both sides thereof; the connecting block (22) is rotatably connected to the fixing rod (27) via a bearing; fixing plates (21) are fixed to both ends of the fixing rod (27); and the fixing plate (21) is fixedly connected to the column (17) via bolts; The fixed rod (27) is provided with a slidable movable ring (25), a limit block (31) is fixed inside the movable ring (25), a limit groove (30) for the limit block (31) to move is formed on the outer wall of the fixed rod (27), and a spring (26) is sleeved on the outside of the fixed rod (27) between the fixed plate (21) and the movable ring (25); A plurality of clamping blocks (29) are arranged in a ring array on one side of the fixed ring (24) facing the movable ring (25), and a clamping groove (28) matching the plurality of clamping blocks (29) is arranged on one side of the movable ring (25) facing the fixed ring (24); The fixing ring (24) and the clamping block (29) are an integrated structure.

7. A hot air blowing device for metal strip according to claim 2, characterized in that: The connecting filter assembly comprises an air guide pipe (42) and a connecting tube (44); a threaded ring (49) is fixed to the outside of the air inlet of the fan (5); the connecting tube (44) is threadedly connected to the threaded ring (49); a connecting cover (43) is connected to the side of the connecting tube (44) opposite to the threaded ring (49); the air guide pipe (42) is connected between the connecting cover (43) and the air inlet box (40); a clamping plate (46) is fixed inside the connecting tube (44); a placement groove (47) is provided inside the clamping plate (46); a filter element (48) for filtering waste heat air is installed inside the placement groove (47); A shield (41) is provided outside the support frame (16).

8. A hot air blowing device for metal strip according to claim 2, characterized in that: The blowing pipe (15) is provided with a vibration mechanism for striking and vibrating the metal strip; The vibration mechanism comprises two air guide cylinders (32), a connecting square tube (37) being connected between the two air guide cylinders (32), and a connecting frame (36) being connected to the back sides of the two air guide cylinders (32), the connecting frame (36) being in communication with the blowing pipe (15), a wind wheel (38) being installed inside the air guide cylinder (32), a rotating rod (33) being connected to one side of the wind wheel (38), and two cams (34) being fixed on the rotating rod (33).

9. A hot air blowing device for metal strip according to claim 8, characterized in that: A roller (35) is mounted on the raised side of the cam (34) via a bearing, and the connecting frame (36) transitions from a circular shape to a rectangular shape from one end to the other end.

10. A hot air blowing device for metal strip according to claim 9, characterized in that: A fixing block (39) is fixed to the outside of the support frame (16), and the rotating rod (33) is rotatably connected to the fixing block (39) via a bearing.

Images