A strip steel surface oxide layer treatment drying apparatus

Abstract

The application discloses a strip steel surface oxide layer treatment drying equipment, which comprises a drying box for drying the strip steel and provided with an inlet on one side and an outlet on the other side; a cleaning device arranged on the side of the drying box close to the inlet and used for cleaning the iron scraps on the surface of the strip steel; an air inlet arranged on the top of the drying box and connected with the heat supply equipment through a warm air pipe; a plurality of groups of arc-shaped plates arranged in the drying box and surrounding the periphery of the strip steel; a sliding seat slidingly arranged on the arc-shaped plates along the extending direction of the arc-shaped plates; a blowing assembly arranged on the sliding seat and used for blowing hot air from the periphery to the surface of the strip steel; and a driving assembly arranged on the arc-shaped plates and used for driving the sliding seat to slide. In use, the rust removing and drying effects on the surface of the strip steel can be improved, so that the quality of the strip steel can be improved.

Description

Technical Field

[0001] This invention relates to the field of strip steel processing equipment, and in particular to a strip steel surface oxide layer treatment and drying equipment. Background Technology

[0002] The strip steel processing process generally involves many steps. For example, after the strip steel is formed, it usually needs to be heated, air-cooled and water-cooled in sequence. During the water-cooling process, water, hot steel and air usually react, which can easily oxidize the surface of the strip steel to form iron filings. In order to meet the factory requirements, the surface of the strip steel usually needs to be derusted and dried.

[0003] Currently, the traditional processing method is to first transport the water-cooled strip steel to the grinding device to remove rust from the surface of the strip steel, and then send the strip steel into the drying box from one side and out from the other side to complete the rust removal and drying process of the strip steel.

[0004] In view of the current technological situation, the inventor believes that traditional drying ovens generally have poor drying effects, resulting in some water droplets or even a small amount of iron filings still adhering to the surface of the strip steel when it is sent out of the drying oven, which needs to be further improved. Summary of the Invention

[0005] The purpose of this application is to provide a strip steel surface oxide layer treatment and drying equipment, which can improve the rust removal and drying effect of the strip steel surface, thereby improving the quality of the strip steel leaving the factory.

[0006] This application provides a strip steel surface oxide layer treatment and drying equipment, which adopts the following technical solution:

[0007] A strip steel surface oxide layer treatment drying equipment includes: a drying box for drying strip steel with an inlet on one side and an outlet on the other side; a cleaning device for cleaning iron filings on the strip steel surface, located near the inlet of the drying box; an air inlet located at the top of the drying box and connected to the heat transfer end of a heating device via a hot air pipe; multiple sets of arc-shaped plates located inside the drying box and surrounding the strip steel; a sliding seat slidably mounted on the arc-shaped plates along the extension direction of the arc-shaped plates; a blowing assembly for blowing hot air from the periphery to the strip steel surface, located on the sliding seat; and a driving assembly located on the arc-shaped plates for driving the sliding seat to slide.

[0008] By adopting the above technical solution, the cleaning device can remove rust from the strip steel before it enters the drying box, and the blowing component can blow hot air onto the strip steel entering the drying box. This not only speeds up the drying process of the strip steel, but also blows away the iron filings adhering to the surface of the strip steel, so that the appearance of the strip steel coming out of the drying box outlet meets the actual requirements, thus improving the overall quality of the strip steel leaving the factory.

[0009] This application further provides that the blowing assembly includes: a mounting block mounted on a sliding seat; a rotating shaft mounted on the mounting block and extending in the same direction as the strip conveying direction; a blowing tube mounted on the rotating shaft and connected to a blower for blowing hot air via a hose; and a first driving member mounted on the sliding seat for driving the rotating shaft to rotate.

[0010] By adopting the above technical solution, when the first driving component is turned on, it can drive the rotating shaft to rotate. During the rotation, the rotating shaft can carry the air blower to blow hot air onto the surface of the strip steel to achieve the drying treatment of the strip steel. The whole process is simple to operate and has obvious effects.

[0011] This application further provides that the drive assembly includes: a take-up wheel mounted at one end of the arc-shaped plate and a fixed pulley at the other end; a pull rope whose ends are connected to both sides of the sliding seat and pass around the take-up wheel and the fixed pulley; and a second drive member mounted on the arc-shaped plate to drive the take-up wheel to rotate.

[0012] By adopting the above technical solution, the second driving component can drive the winding wheel to rotate. During the rotation of the winding wheel, the sliding seat can be driven to slide on the arc plate by the pull rope. This solution can effectively increase the blowing range of the blower to better achieve the drying treatment of the strip steel surface.

[0013] This application further provides that: each set of arc-shaped plates surrounding the strip steel consists of four pieces, wherein L-shaped plates are installed at the four corners of the drying box, and sliding plates for mounting the arc-shaped plates are slidably arranged on the L-shaped plates along the direction perpendicular to the strip steel conveying direction, and a third driving component is provided inside the drying box for driving the sliding plates to move closer or further apart.

[0014] By adopting the above technical solution, the third driving component can drive the symmetrical sliding plates to move closer or further apart in the horizontal direction, thereby making it easy to adjust the distance between the curved plate and the strip steel according to actual needs, so as to adapt to more actual needs and increase the scope of application of this application.

[0015] This application further provides that: the skateboard is provided with a telescopic cylinder whose extension direction is perpendicular to the sliding direction of the skateboard; the arc-shaped plate is installed at the end of the telescopic cylinder away from the skateboard; and the skateboard is provided with a fourth driving component for driving the telescopic cylinder to extend and retract.

[0016] By adopting the above technical solution, the fourth driving member can drive the arc-shaped plates to move closer or further apart in the vertical direction, thereby increasing the range of motion of the arc-shaped plates based on the third driving member, and further increasing the scope of application of this application.

[0017] This application further provides that: within the drying chamber, slide rods are provided on both the upper and lower sides of the strip, with the length direction aligned with the strip conveying direction; movable seats are slidably mounted on each slide rod; blowing components for blowing hot air onto the surface of the strip are provided on each movable seat; and a power component for driving the movable seats to move in the opposite direction is also provided within the drying chamber.

[0018] By adopting the above technical solution, the blowing component can cooperate with the blowing component and slide along the slide bar under the drive of the power component, so that the strip steel can also be exposed to the hot air of the blowing component in the length direction, thereby increasing the heating range of the strip steel and making it more conducive to the drying of the strip steel and the cleaning of iron filings.

[0019] This application further provides that the power assembly includes: a rotating rod installed inside the drying chamber with its length direction perpendicular to the strip conveying direction; a connecting block vertically installed at the end of the rotating rod; a telescopic rod with one end fixed to the end of the connecting block and the other end hinged to the movable seat; and a fifth driving component installed inside the drying chamber for driving the rotating rod to rotate.

[0020] By adopting the above technical solution, when the fifth driving component is activated, the rotating rod can be driven to rotate. When the rotating rod rotates, it can drive the symmetrical moving seats to move closer or further apart through the telescopic rod. This structural design is ingenious and has obvious effects.

[0021] This application further provides that: a fixed block is installed on the movable seat, a fixed shaft parallel to the rotating rod is rotatably installed on the fixed block, one end of the telescopic rod away from the connecting block is fixed to the outer end of the fixed shaft, and the blowing assembly includes a blowing tube, the opening of which faces the same direction as the extension direction of the telescopic rod.

[0022] By adopting the above technical solution, the opening orientation of the blowing tube is restricted, so that the blowing direction of the blowing tube is always consistent with the extension direction of the telescopic rod, so that the air blown towards the strip steel forms convection, which is conducive to increasing the drying effect of the strip steel and the cleaning effect of iron filings.

[0023] This application further provides that: multiple vertical plates are vertically installed inside the drying oven, and sliding blocks are slidably installed on the vertical plates along the vertical direction. The end of the sliding rod is fixed to the sliding block, and a sixth driving member is also provided on the vertical plate to drive the symmetrical sliding blocks to move closer or further apart.

[0024] By adopting the above technical solution, the sixth driving component can drive the sliding block to slide along the extension direction of the vertical plate when it is turned on, thereby realizing the adjustment of the height of the blowpipe to meet more practical needs and increase the scope of application of this application.

[0025] This application further provides that: mounting frames are installed on both the upper and lower sides of the discharge port of the drying box, and brush rollers with their length direction perpendicular to the conveying direction of the strip are installed on the mounting frames; the drying box is also provided with an adjustment component for adjusting the distance between the two brush rollers.

[0026] By adopting the above technical solution, the brush rollers can further clean the iron filings adhering to the surface of the strip steel, thereby improving the quality of the product leaving the factory. The adjustment components can adjust the spacing between the brush rollers according to actual needs to meet the requirements of strip steel with greater thickness.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] By setting multiple sets of arc-shaped plates surrounding the strip steel and setting air blowing components on the arc-shaped plates, when the drive component is turned on, the air blowing components can blow hot air onto the strip steel from different directions to achieve drying of the strip steel and cleaning of surface iron filings; and the third and fourth drive components set up cooperate with each other to further increase the air blowing range on the strip steel, thereby increasing the working effect of this application.

[0029] By setting a horizontally movable base and a blowing component on the movable base, when the power component is turned on, hot air can be blown onto the surface of the strip along the length of the strip. The blowing component and the air blowing component work together to effectively achieve surface treatment of the strip. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0031] Figure 2 This is a schematic diagram of the structure of the blower assembly in the embodiments of this application;

[0032] Figure 3 This is a schematic diagram of the structure of the blowing component in the embodiments of this application;

[0033] Figure 4 This is a schematic diagram of the structure of the brush roller and adjustment assembly in the embodiments of this application.

[0034] Explanation of reference numerals in the attached drawings: 1. Drying oven; 10. Hot air duct; 2. Arc-shaped plate; 20. Sliding seat; 21. Mounting block; 22. Rotating shaft; 23. Blower; 24. Rewinding wheel; 25. Pull rope; 26. Fixed pulley; 3. L-shaped plate; 31. Slide plate; 32. Telescopic cylinder; 4. Slide rod; 41. Moving seat; 42. Rotating rod; 43. Connecting block; 44. Telescopic rod; 45. Fixing block; 46. Blowing cylinder; 5. Vertical plate; 50. Sliding block; 6. Mounting frame; 60. Brush roller; 61. Extension block; 62. Threaded rod; 7. Machine casing; 71. Rotating cylinder. Detailed Implementation

[0035] The present application will be further described in detail below with reference to the accompanying drawings.

[0036] This application discloses a drying device for treating the oxide layer on the surface of steel strip, such as... Figure 1 and Figure 2 As shown, it includes: a drying box 1 for drying strip steel, with a feed inlet on one side of the drying box 1 and a discharge outlet on the opposite side of the drying box 1. An air inlet (not shown in the figure) is provided on the top of the drying box 1. The air inlet is connected to the heat transmission end of the heating equipment through a hot air pipe 10. The heating equipment in this embodiment is mainly used to provide hot air to the drying box 1, which is also quite common in real life, and will not be described in detail here.

[0037] A cleaning device is installed near the feed inlet of the drying box 1. The cleaning device is used to clean the iron filings on the surface of the strip steel. When it is necessary to remove rust and dry the strip steel, the strip steel can be passed through the cleaning device, the feed inlet of the drying box 1 and the discharge outlet of the drying box 1 in sequence by using the conveying device to achieve the cleaning and drying of the iron filings on the strip steel.

[0038] In this embodiment, two sets of arc-shaped plates 2 are provided inside the drying chamber 1. Each set of arc-shaped plates 2 corresponds to the position near the inlet and outlet of the drying chamber 1. Each set of arc-shaped plates 2 consists of four pieces, and the four arc-shaped plates 2 surround the periphery of the strip steel. A sliding seat 20 is slidably installed on the arc-shaped plate 2. The sliding seat 20 can slide along the extension direction of the arc-shaped plate 2. At the same time, a blowing assembly is also installed on the sliding seat 20. The blowing assembly can blow out hot air. A driving assembly is also provided on the arc-shaped plate 2. When the driving assembly is turned on, it can drive the sliding seat 20 to slide on the arc-shaped plate 2, so as to drive the blowing assembly on the sliding seat 20 to blow air onto the surface of the strip steel. By blowing air, not only can the surface drying of the strip steel be accelerated, but also the iron filings adhering to the surface of the strip steel can be removed.

[0039] The blowing assembly includes: a mounting block 21 mounted on a sliding seat 20, a rotating shaft 22 mounted on the mounting block 21, the length direction of the rotating shaft 22 being consistent with the conveying direction of the strip steel, a blowing tube 23 mounted on the rotating shaft 22, the opening of the blowing tube 23 facing the strip steel, and a first driving member also provided on the sliding seat 20, the first driving member being used to drive the rotating shaft 22 to rotate. The blowing tube 23 is connected to the blower through a flexible hose. It should be noted that the blower in this embodiment can blow out hot air, and the blower, like the heating equipment, can be equipped with a heating wire connected to a power source inside, and the hot air heated by the heating wire is blown into the drying chamber 1.

[0040] In this embodiment, the driving component includes: a take-up wheel 24 installed at one end of the arc plate 2 and a fixed pulley 26 at the other end. Pull ropes 25 are fixed on both sides of the sliding seat 20. The pull ropes 25 pass around the fixed pulley 26 and are wound around the take-up wheel 24. A second driving member is also installed on the arc plate 2. The second driving member is used to drive the take-up wheel 24 to rotate.

[0041] When the strip needs to be dried, the second drive unit can be activated to drive the take-up wheel 24 to rotate. The take-up wheel 24 drives the pull rope 25 by winding, thereby driving the sliding seat 20. At the same time, the first drive unit on the sliding seat 20 can drive the rotating shaft 22 to rotate, thereby adjusting the opening direction of the blower 23 so that the opening of the blower 23 faces the predetermined position of the strip, so as to ensure the drying and iron filings removal effect of the strip.

[0042] Considering that in practice, the distance between the arc plate 2 and the strip steel sometimes needs to be adjusted, in this embodiment, L-shaped plates 3 are installed at the four corners of the drying box 1, and sliding plates 31 are slidably installed on the L-shaped plates 3. The sliding direction of the sliding plates 31 is perpendicular to the conveying direction of the strip steel. A third driving component is also provided in the drying box 1. The third driving component is used to drive the symmetrical sliding plates 31 to move closer or further apart in the horizontal direction, so as to realize the adjustment of the distance between the arc plate 2 and the strip steel.

[0043] In order to expand the range of motion of the curved plate 2 and adapt to as many actual needs as possible, in this embodiment, multiple telescopic cylinders 32 are provided on the slide plate 31. The extension direction of the telescopic cylinders 32 is perpendicular to the sliding direction of the slide plate 31, that is, along the vertical direction. It should be noted that in this embodiment, the curved plate 2 is installed on the end of the telescopic cylinder 32 away from the slide plate 31, and a fourth driving member is also installed on the slide plate 31. The fourth driving member is used to drive the telescopic cylinder 32 to extend and retract.

[0044] When the third drive component is activated, the distance between the arc plate 2 and the strip can be adjusted in the horizontal direction. When the fourth drive component is activated, the distance between the arc plate 2 and the strip can be adjusted in the vertical direction based on the third drive component. The third and fourth drive components work together to easily adjust the distance between the arc plate 2 and the strip.

[0045] In this embodiment, as Figure 1 and Figure 3As shown, the blowing assembly blows air onto the surface of the strip steel primarily along its width. To achieve comprehensive drying of the strip steel, slide rods 4 are installed on the upper and lower sides of the strip steel inside the drying chamber 1. The length direction of the slide rods 4 is consistent with the conveying direction of the strip steel, and a movable seat 41 is slidably connected to the slide rods 4. A blowing assembly is installed on the movable seat 41. Similarly, the blowing assembly is connected to the heat transfer end of the heating equipment. In addition, a power assembly is also provided inside the drying chamber 1. The power assembly is used to drive the symmetrical movable seat 41 to move in opposite directions.

[0046] In this embodiment, the power assembly includes: a rotating rod 42 installed inside the drying chamber 1, the length direction of the rotating rod 42 being perpendicular to the conveying direction of the strip steel; a connecting block 43 installed at the end of the rotating rod 42 away from the inner wall of the drying chamber 1, the connecting block 43 being perpendicular to the rotating rod 42; telescopic rods 44 fixed on both sides of the connecting block 43, the end of the telescopic rod 44 away from the connecting block 43 being hinged to the movable seat 41; it should be noted that the telescopic rod 44 and the connecting block 43 are on the same straight line; in addition, a fifth driving component is also installed inside the drying chamber 1, the fifth driving component being used to drive the rotating rod 42 to rotate.

[0047] In this embodiment, a fixed block 45 is installed on the movable seat 41, and a fixed shaft is rotatably installed on the fixed block 45. The fixed shaft is parallel to the rotating rod 42, and the end of the telescopic rod 44 away from the connecting block 43 is fixed to the outer end of the fixed shaft. The blowing assembly in this embodiment includes a blowing tube 46 installed on the fixed shaft. The blowing tube 46 is located directly above and below the strip steel, and the blowing tube 46 is also connected to a blower that can blow out hot air through a hose. It should be noted that the opening of the blowing tube 46 in this embodiment is aligned with the extension direction of the telescopic rod 44.

[0048] The advantage of this setup is that when the fifth drive unit is activated, the symmetrical moving seat 41 can be moved relative to each other via the telescopic rod 44. When the moving seat 41 moves, the opening of the blowing cylinder 46 always faces the same direction as the extension of the telescopic rod 44. This allows the swing angle of the blowing cylinder 46 to be synchronized with the rotation angle of the telescopic rod 44, ensuring that the hot air blown onto the strip surface forms convection, thereby enhancing the drying effect on the strip.

[0049] Considering that the height of the slide rod 4 may need to be adjusted in practice, multiple vertical plates 5 are also vertically installed inside the drying oven 1. Sliding blocks 50 are slidably installed on the vertical plates 5 in the vertical direction, and the end of the slide rod 4 is fixed on the sliding block 50. A sixth driving member is also provided on the vertical plate 5. The sixth driving member is used to drive the symmetrical sliding blocks 50 to move closer or further apart, so as to adjust the distance between the slide rod 4 and the strip steel.

[0050] In this embodiment, as Figure 1As shown, the cleaning device includes: a housing 7 located near the feed inlet of the drying chamber 1, the housing 7 having an opening for the steel strip to enter and exit, and rotating drums 71 installed at the upper and lower positions inside the housing 7. An upper air knife is installed on the outside of the upper rotating drum 71, and a lower air knife is installed on the outside of the lower rotating drum 71. Both rotating drums 71 are driven by motors.

[0051] When the strip steel passes horizontally through the machine box 7 under the conveyor, the motor will drive the rotating drum 71 to rotate. The upper and lower air knives on the rotating drum 71 work together to easily grind and remove rust from the upper and lower surfaces of the strip steel. The whole process is simple to operate. In addition, in order to facilitate the discharge of iron filings, drain ports are provided at the bottom of the machine box 7 and the bottom of the drying box 1.

[0052] like Figure 4 As shown, considering that in practice, after the strip steel is treated by the air blowing in the drying box 1, a small amount of iron filings may still adhere to the surface, in this embodiment, mounting frames 6 are installed on both the upper and lower sides of the discharge port of the drying box 1. The mounting frames 6 are slidably installed on the outside of the drying box 1 in the vertical direction. Brush rollers 60 are installed on the mounting frames 6. The length direction of the brush rollers 60 is perpendicular to the conveying direction of the strip steel. In addition, an adjustment component is also provided on the outside of the drying box 1. The adjustment component is used to adjust the distance between the two brush rollers 60 to adapt to more actual needs.

[0053] In this embodiment, the adjustment component includes: an extension block 61 fixed on one side of the mounting frame 6, and a bidirectional threaded rod 62 installed vertically on the outside of the drying box 1, with the bidirectional threaded rod 62 vertically threaded through the two extension blocks 61. When it is necessary to adjust the distance between the two brush rollers 60, it is only necessary to rotate the bidirectional threaded rod 62.

[0054] It should be noted that the first, second, and fifth driving components in this embodiment all use common servo motors, the fourth driving component can be a cylinder or a hydraulic cylinder, and the third and sixth driving components can both be a combination structure of a lead screw with bidirectional threads and a motor. Since the above driving components are all common, they will not be described in detail here.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A drying device for treating the oxide layer on the surface of steel strip, characterized in that, include: A drying oven (1) for drying strip steel with an inlet on one side and an outlet on the other side; A cleaning device is installed on the side of the drying box (1) near the feed inlet to clean iron filings from the surface of the strip steel; An air inlet is set on the top of the drying box (1) and connected to the heat transfer end of the heating equipment through a hot air pipe (10); Multiple sets of arc-shaped plates (2) are set inside the drying oven (1) and surround the periphery of the strip steel. A sliding seat (20) is slidably installed on the arc plate (2) along the extension direction of the arc plate (2); A blower assembly installed on the sliding seat (20) to blow hot air from the periphery to the surface of the strip; And a drive assembly set on the arc plate (2) for driving the sliding seat (20) to slide; The drying box (1) is equipped with slide rods (4) on both the upper and lower sides of the strip steel, and the slide rods (4) are aligned with the length direction of the strip steel conveying direction. Each slide rod (4) is slidably mounted with a movable seat (41). The movable seat (41) is equipped with a blowing assembly that blows hot air toward the surface of the strip steel. The drying box (1) is also equipped with a power assembly for driving the movable seat (41) to move in the opposite direction. The power assembly includes: a rotating rod (42) installed inside the drying chamber (1) and whose length direction is perpendicular to the strip conveying direction; a connecting block (43) installed vertically at the end of the rotating rod (42); a telescopic rod (44) with one end fixed to the end of the connecting block (43) and the other end hinged to the moving seat (41); and a fifth driving component installed inside the drying chamber (1) for driving the rotating rod (42) to rotate; A fixed block (45) is installed on the movable seat (41). The fixed block (45) is rotatably mounted with a fixed shaft parallel to the rotating rod (42). The end of the telescopic rod (44) away from the connecting block (43) is fixed to the outer end of the fixed shaft. The blowing assembly includes a blowing tube (46). The opening of the blowing tube (46) faces the same direction as the extension direction of the telescopic rod (44).

2. The strip steel surface oxide layer treatment and drying equipment according to claim 1, characterized in that, The blowing assembly includes: a mounting block (21) mounted on a sliding seat (20); a rotating shaft (22) mounted on the mounting block (21) and extending in the same direction as the strip conveying direction; a blower (23) mounted on the rotating shaft (22) and connected to a blower for blowing hot air via a hose; and a first driving member mounted on the sliding seat (20) for driving the rotating shaft to rotate.

3. The strip steel surface oxide layer treatment and drying equipment according to claim 1, characterized in that, The drive assembly includes: a take-up wheel (24) mounted on one end of the arc plate (2) and a fixed pulley (26) on the other end; a pull rope (25) with its ends connected to both sides of the sliding seat (20) and passing around the take-up wheel (24) and the fixed pulley (26); and a second drive member mounted on the arc plate (2) to drive the take-up wheel (24) to rotate.

4. The strip steel surface oxide layer treatment and drying equipment according to claim 1, characterized in that, Each set of arc-shaped plates (2) surrounding the strip steel consists of four pieces. Among them, L-shaped plates (3) are installed at the four corners of the drying box (1). Slide plates (31) for mounting the arc-shaped plates (2) are slidably arranged on the L-shaped plates (3) along the direction perpendicular to the strip steel conveying direction. A third driving component is provided in the drying box (1) for driving the slide plates (31) to move closer or further apart.

5. The strip steel surface oxide layer treatment and drying equipment according to claim 4, characterized in that, The slide plate (31) is provided with a telescopic cylinder (32) whose extension direction is perpendicular to the sliding direction of the slide plate (31). The arc plate (2) is installed at the end of the telescopic cylinder (32) away from the slide plate (31). The slide plate (31) is provided with a fourth driving member for driving the telescopic cylinder (32) to extend and retract.

6. The strip steel surface oxide layer treatment and drying equipment according to claim 1, characterized in that, The drying box (1) has multiple vertical plates (5) installed vertically. Sliding blocks (50) are slidably installed on the vertical plates (5) along the vertical direction. The end of the sliding rod (4) is fixed to the sliding block (50). The vertical plate (5) is also provided with a sixth driving member that drives the symmetrical sliding blocks (50) to move closer or further away from each other.

7. The strip steel surface oxide layer treatment and drying equipment according to claim 1, characterized in that, The drying box (1) has mounting frames (6) installed on both the upper and lower sides of the discharge port. The mounting frames (6) are equipped with brush rollers (60) whose length direction is perpendicular to the conveying direction of the strip steel. The drying box (1) is also equipped with an adjustment component for adjusting the distance between the two brush rollers (60).

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