A surface treatment device for metal sheets

Abstract

This invention discloses a surface treatment device for metal sheets, relating to the field of metal material heat treatment technology. It includes a heat treatment furnace body, with a pipe connected to one side of the top of the furnace body and a blower assembly connected to the bottom of the pipe. The blower assembly includes a mounting shell connected to the pipe, and a corrugated pipe is fixedly connected to the inner top wall of the mounting shell. In this invention, by utilizing a controllable number of air outlets combined with an adaptive alignment design for the air inlets, the limitations of fixed air inlets are completely eliminated. When the number of air outlets is adjusted, the air inlets can accurately match the core area of ​​the air outlet distribution. With a single air outlet, it is directly opposite; with two air outlets, it is positioned between the two air outlets; and with three air outlets, it is directly opposite the middle of the three air outlets. No additional structural adjustments are needed to adapt to different air outlet numbers. Airflow is smooth and without deviation, fundamentally solving the problem of mismatch between the number of fixed air inlets and outlets.

Description

Technical Field

[0001] This invention relates to the field of heat treatment technology for metal materials, specifically to a surface treatment device for metal sheets. Background Technology

[0002] In the processing of ferroalloy plates, some long strips, after shearing and laser cutting, need to meet the requirements of subsequent precision assembly. Typically, only one sharp edge is retained, while the other three sides are chamfered to prevent damage during transportation and processing. In the heat treatment surface treatment process for these ferroalloy plates with retained sharp edges, the core requirement is to ensure the precision and surface quality of the sharp edge. This requires using protective gases such as nitrogen and inert gases to prevent high-temperature oxidation and decarburization of the edge, while also preventing edge chipping and slag shedding caused by the impact of circulating airflow. Simultaneously, it is necessary to ensure uniform temperature conduction within the furnace to avoid uneven heating of the plate, which could lead to problems such as hardness deviations and substandard microstructure. In surface strengthening processes such as carburizing and nitriding, it is also necessary to ensure that the carburizing agent uniformly contacts the edge and plate surface to guarantee a consistent carburized layer.

[0003] Existing ferroalloy plate surface treatment equipment is typically equipped with an air circulation system, which uses a fan to drive the airflow inside the furnace to achieve uniform distribution of protective atmosphere, temperature, and diffusion agent. In existing technologies, most methods only adjust the circulating air speed using a fan, with the air inlet position remaining fixed. This cannot adapt to dynamic changes in the number of air outlets, nor can it achieve precise airflow coverage for single-sided corners. When it is necessary to adjust the number of air outlets to strengthen the protection of a single-sided corner, the fixed air inlet is difficult to accurately align with the core area of ​​the air outlet distribution, which can easily lead to airflow deviation. This results in insufficient airflow and inadequate protective gas coverage at the air outlets corresponding to the corners. Because of their large surface area, corners are prone to oxygen accumulation, becoming a major area for oxidation and decarburization. On the other hand, the three sides of the beveled edge of the board may be over-covered by airflow, resulting in waste of protective gas. At the same time, indiscriminate airflow impact may also cause sharp corners to chip and fall off, damaging the precision of the corners. The air outlet speed is adjusted by the fan.

[0004] In view of the above, this application is hereby submitted. Summary of the Invention

[0005] The purpose of this invention is to provide a surface treatment apparatus for metal sheets to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides a surface treatment device for metal sheets, including a heat treatment furnace body. A pipe is connected to one side of the top of the heat treatment furnace body, and a blowing assembly is connected to the bottom of the pipe. The blowing assembly includes a mounting shell connected to the pipe. A corrugated pipe is fixedly connected to the inner top wall of the mounting shell. A connecting frame is fixedly connected to one side of the corrugated pipe. A first threaded rod is threadedly connected to the inner wall of one side of the connecting frame. A transition plate is slidably connected to the bottom of the connecting frame. A baffle is slidably connected to the outer wall of the transition plate. A second threaded rod is threadedly connected to the inner wall of the baffle away from the first threaded rod and close to the bottom. A drive wheel and a transmission wheel are fixedly connected to the same side of the first threaded rod and the second threaded rod, respectively. A transmission belt is sleeved between the drive wheel and the transmission wheel. A first air outlet and a second air outlet are respectively opened on the inner walls of the transition plate and the mounting plate. The airflow coverage area can be adjusted when the corrugated pipe slides. The baffle can prevent the airflow from excessively covering the chamfered area. The distribution spacing ratio of the first air outlet and the second air outlet is 1:1.5 to avoid airflow deviation.

[0007] Furthermore, a first bevel gear is fixedly connected to one side of the drive wheel, a second bevel gear is meshed with one side of the top of the first bevel gear, a motor is fixedly connected to the middle of the second bevel gear, and a heat insulation block is fixedly connected to one end of the motor near the heat treatment furnace body.

[0008] Furthermore, a soft pad is fixedly connected to the bottom end of the corrugated pipe, and the soft pad is in contact with the outer wall of the top of the transition plate. Both the transition plate and the mounting plate are fixedly connected to the inner wall of the mounting shell.

[0009] Furthermore, an air outlet is fixedly connected to the bottom of the mounting plate at the position corresponding to each second air outlet, and a groove is opened on one side of the inner wall of the baffle, through which the baffle is slidably connected to the transition plate.

[0010] Furthermore, the bottom of the transition plate is fixedly connected to a guide port at the position corresponding to each first air outlet, and an installation groove is opened in the middle of the bottom of the slot. A rubber curtain is fixedly connected to the inner wall of the installation groove, so that the guide port can pass through the rubber curtain when the baffle moves.

[0011] Furthermore, the diameter of the drive wheel is 1.5 times that of the transmission wheel to match the spacing ratio between the first and second air vents.

[0012] Furthermore, the drive wheel and the transmission wheel are connected by a transmission belt. When the motor drives the drive wheel to rotate, the speed of the transmission wheel is 1.5 times that of the drive wheel. The travel of the first threaded rod driving the connecting frame and the travel of the second threaded rod driving the baffle are adapted to the spacing ratio of the first air outlet and the second air outlet.

[0013] Furthermore, the extension length of the bellows is adapted to the maximum movement distance of the connecting frame along the first threaded rod, and the soft pad is always in close contact with the top outer wall of the transition plate to ensure the airflow seal between the bellows and the transition plate.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. By utilizing the controllable number of air outlets and the adaptive alignment design of air inlets, the limitations of fixed air inlets are completely eliminated. When the number of air outlets is adjusted, the air inlets can be precisely matched with the core area of ​​the air outlet distribution. With a single air outlet, it is set directly opposite; with two air outlets, it is set between the two air outlets; and with three air outlets, it is set directly in the middle of the three air outlets. No additional structural adjustments are needed to adapt to different air outlet numbers and working conditions. The airflow is smooth and without deviation, solving the problem of mismatch between the number of fixed air inlets and air outlets from the root.

[0015] 2. To address the protection requirements of retaining sharp edges on one side, the number of air outlets can be adjusted as needed, and the air inlets can be precisely aligned to concentrate the airflow and guide it to the air outlet corresponding to the sharp edge on one side. The airflow is delivered evenly and without loss, and the protective gas fully wraps the surface of the sharp edge. This avoids the problem of insufficient airflow at the air outlet corresponding to the sharp edge caused by the airflow deviation at the fixed air inlet, effectively isolating oxygen and solving the problem that sharp edges are prone to oxygen accumulation due to their large surface area, becoming a major area of ​​oxidation and decarbonization, and ensuring that the surface quality of the sharp edges meets the standards.

[0016] 3. By controlling the number of air outlets, only the air outlets corresponding to the corners on one side can be opened, while the ineffective air outlets corresponding to the chamfered three sides of the board can be closed. The airflow will only act on the area requiring protection and will not cause excessive coverage of the chamfered three sides. This allows the protective gas to act precisely on the parts that need protection, eliminates the meaningless consumption of protective gas, greatly improves the utilization rate of protective gas, and reduces production costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a metal sheet surface treatment device; Figure 2 This is a schematic diagram of the drive component in a metal sheet surface treatment device. Figure 3 This is a schematic diagram of the internal structure of a blower assembly in a metal sheet surface treatment device. Figure 4 A front view of the internal structure of the blowing component in a metal sheet surface treatment device; Figure 5 This is a schematic diagram of the connection structure of a corrugated pipe in a metal sheet surface treatment device. Figure 6 This is a schematic diagram of the structure of a baffle in a metal sheet surface treatment device. Figure 7 This is a schematic diagram of the structure of a transition plate and a mounting plate in a metal sheet surface treatment device.

[0018] In the diagram: 1. Heat treatment furnace body; 2. Pipeline; 3. Blowing assembly; 301. Mounting shell; 302. Corrugated pipe; 303. Soft pad; 304. Connecting frame; 305. First threaded rod; 306. Baffle; 307. Second threaded rod; 308. Slot; 309. Transition plate; 310. First air outlet; 311. Mounting plate; 312. Second air outlet; 313. Drive wheel; 314. Transmission belt; 315. Transmission wheel; 4. First bevel gear; 5. Second bevel gear; 6. Motor; 7. Heat insulation block; 8. Air outlet; 9. Guide port; 10. Rubber curtain. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1 to 7This invention provides a technical solution: a surface treatment device for metal sheets, including a heat treatment furnace body 1. A pipe 2 is connected to one side of the top of the heat treatment furnace body 1, and a blowing assembly 3 is connected to the bottom of the pipe 2. The blowing assembly 3 includes a mounting shell 301 connected to the pipe 2. A corrugated pipe 302 is fixedly connected to the inner top wall of the mounting shell 301. A connecting frame 304 is fixedly connected to one side of the corrugated pipe 302. A first threaded rod 305 is threadedly connected to the inner wall of one side of the connecting frame 304. A transition plate 309 is slidably connected to the bottom of the connecting frame 304. A baffle 306 is slidably connected to the outer wall of the transition plate 309. A second threaded rod 307 is threadedly connected to the inner wall of the baffle 306 away from the first threaded rod 305 and closer to the bottom. A drive wheel 313 and a transmission wheel 315 are fixedly connected to one end of the threaded rod 305 and the second threaded rod 307 on the same side, respectively. A first bevel gear 4 is fixedly connected to one side of the drive wheel 313. A second bevel gear 5 is meshed with one side of the top of the first bevel gear 4. A motor 6 is fixedly connected to the middle of the second bevel gear 5. A heat insulation block 7 is fixedly connected to one end of the motor 6 near the heat treatment furnace body 1. The heat insulation block 7 is set close to the heat treatment furnace body 1 to isolate high temperature. A transmission belt 314 is sleeved between the drive wheel 313 and the transmission wheel 315. The diameter of the drive wheel 313 is 1.5 times that of the transmission wheel 315. The transition plate 309 and the mounting plate 311 are both fixed to the inner wall of the mounting shell 301. The inner walls of the two are respectively provided with a first air vent 310 and a second air vent 310. The first air vent 310 and the second air vent 312 are spaced at a ratio of 1:1.5. A guide port 9 is fixed at the bottom of the transition plate 309 corresponding to the position of each first air vent 310. An air outlet 8 is fixed at the bottom of the mounting plate 311 corresponding to the position of each second air vent 312. The guide ports 9 and second air vents 312 are precisely aligned. A slot 308 is formed on one inner wall of the baffle 306, and the baffle 306 is slidably connected to the transition plate 309 through the slot 308. A rubber curtain 10 is fixed at the center of the bottom of the slot 308. A soft pad 303 is fixedly connected to the bottom of the corrugated pipe 302, and the soft pad 303 abuts against the top outer wall of the transition plate 309. After starting the motor 6, the power is transmitted sequentially through the second bevel gear 5 and the first bevel gear 4 to the drive wheel. 313 drives the drive wheel 313 to rotate. The drive wheel 313 is linked to the transmission wheel 315 through the sleeved transmission belt 314. The transmission wheel 315 rotates synchronously at 1.5 times the speed of the drive wheel 313, thereby driving the first threaded rod 305 and the second threaded rod 307 to rotate synchronously with their corresponding wheel bodies. When the first threaded rod 305 rotates, it drives the connecting frame 304 to slide along its axial direction. The connecting frame 304 synchronously drives the bellows 302 to extend and retract. The soft pad 303 always fits tightly against the surface of the transition plate 309. At the same time, the second threaded rod 307 rotates, causing the baffle 306 to slide along the length direction of the transition plate 309. The travel of the first threaded rod 305 and the second threaded rod 307 is adapted to the first air outlet 310 and the second air outlet 312 in a 1:1 ratio.The 5-distribution spacing ratio ensures that the sliding positions of the connecting frame 304 and the baffle 306 always correspond precisely. When the connecting frame 304 drives the corrugated pipe 302 to slide to the area corresponding to the first air outlet 310, the corrugated pipe 302 covers the position of the first air outlet 310 in that area. At this time, the guide port 9 passes through the rubber curtain 10 and precisely connects with the second air outlet 312. The airflow enters the corrugated pipe 302 inside the mounting housing 301 through the pipe 2, passes through the first air outlet 310, the guide port 9, and the second air outlet 312 in sequence, and finally exits from the air outlet 8, precisely covering the single-sided corner area of ​​the metal plate. In the prior art, circulation is only achieved by adjusting the fan. At a given wind speed, the fixed position of the air inlet cannot adapt to dynamic changes in the number of air outlets (8), nor can it achieve precise airflow coverage for single-sided corners. When adjusting the number of air outlets (8) to enhance protection of a single-sided corner, the fixed air inlet cannot accurately align with the core area of ​​the air outlet distribution, easily leading to airflow deviation. This results in insufficient airflow and inadequate protective gas coverage at the corner, making the corner a major area for oxidation and decarburization due to its large surface area and tendency to accumulate oxygen. Conversely, the three sides of the beveled edge of the board may be over-covered by airflow, wasting protective gas. Furthermore, indiscriminate airflow impact can cause sharp corners to chip and crumble, compromising corner precision.

[0021] When the corrugated pipe 302 slides, the airflow coverage area can be adjusted. The baffle 306 can prevent the airflow from excessively covering the chamfered area, solving the problem of excessive airflow coverage on the three sides of the chamfered area of ​​the plate in the prior art, and reducing the ineffective waste of protective gas. At the same time, it avoids indiscriminate airflow impact, eliminates sharp edge chipping and flaking, and protects the edge precision from damage. The distribution spacing ratio of the first air outlet 310 and the second air outlet 312 is 1:1.5, which avoids airflow deviation and solves the defects of the fixed air inlet in the prior art that is difficult to accurately align with the core area of ​​the air outlet distribution and is prone to airflow deviation. It ensures uniform and stable airflow delivery, ensures that the protective gas fully covers the single edge, and further improves the protection effect.

[0022] Please see Figure 3This invention provides a technical solution: a surface treatment device for metal sheets, comprising a heat treatment furnace body 1 as the core supporting foundation, with a pipe 2 connected to one side of its top to transport airflow, a first bevel gear 4 fixedly connected to one side of a drive wheel 313, a second bevel gear 5 meshing with one side of the top of the first bevel gear 4, a motor 6 fixedly connected to the middle of the second bevel gear 5, and a heat insulation block 7 fixedly connected to one end of the motor 6 near the heat treatment furnace body 1. The motor 6 is fixed to the position near the heat treatment furnace body 1 by the heat insulation block 7, and the heat insulation block 7 is set tightly against the heat treatment furnace body 1 to achieve high-temperature isolation protection for the motor 6; the first bevel gear 4 is fixed to one side of the drive wheel 313, and the drive wheel 313 is fixedly connected to the first threaded rod 305 in the air blowing assembly 3, forming a complete power transmission link to ensure Power can be precisely transmitted to the inside of the blower assembly 3. In existing technologies, when the circulating air speed is adjusted by the fan, the air inlet position remains fixed and cannot adapt to the dynamic changes in the number of air outlets 8, nor can it achieve precise airflow coverage for single-sided corners. When it is necessary to adjust the air outlet to strengthen the protection of a single-sided corner, the fixed air inlet is difficult to accurately align with the core area of ​​the air outlet distribution, which easily leads to airflow deviation. This results in insufficient airflow at the air outlets corresponding to the corners and inadequate protective gas coverage. Due to their large surface area, the corners are prone to oxygen accumulation, becoming a major area for oxidation and decarburization. On the other hand, the three sides of the beveled plate may be over-covered by airflow, resulting in waste of protective gas. At the same time, indiscriminate airflow impact may also cause sharp corners to chip and shed slag, damaging the corner precision. The heat insulation block 7 isolates the high temperature emitted by the heat treatment furnace body 1, thus protecting the motor 6. This solves the problem of the motor 6 being easily damaged by overheating when close to the heat treatment furnace body 1 in existing technologies, ensuring that the motor 6 operates stably at a suitable temperature, extending its service life, avoiding control interruptions due to faults, and thus preventing problems such as corner protection failure, oxidation, and decarburization.

[0023] Please see Figure 5This invention provides a technical solution: a surface treatment device for metal sheets, comprising a corrugated pipe 302 with a soft pad 303 fixedly connected to its bottom end. The soft pad 303 and the outer wall of the top end of the transition plate 309 are in contact, forming a reliable seal to avoid airflow leakage and loss, ensuring sufficient airflow is delivered to the target air outlet. This addresses the problems of insufficient airflow at fixed air inlets and inadequate protective gas coverage, reducing the risk of oxidation and decarburization at the source. The sealing structure of the corrugated pipe 302 and the soft pad 303 adapts to the adjustment requirements of the airflow coverage area, always maintaining a sealed state and preventing airflow deviation. This addresses the problem of fixed air inlets being difficult to align with the core area of ​​the air outlet and the tendency for airflow deviation, ensuring precise airflow guidance to the unilateral corner area and transition... Both plate 309 and mounting plate 311 are fixedly connected to the inner wall of mounting housing 301, providing a benchmark for precise airflow transmission. This addresses the problem of fixed air inlet positions that cannot adapt to dynamic changes in the number of air outlets 8, helping to achieve precise airflow coverage of single-sided corners, preventing oxygen accumulation, and solving the problem that corners are prone to oxidation and decarbonization. Corrugated pipe 302, soft pad 303, transition plate 309, mounting plate 311, and mounting housing 301 work together to form a stable and controllable airflow delivery and regulation structure. This addresses the multiple defects of existing technologies that rely solely on fan speed regulation, achieving multiple effects such as precise protection of single-sided corners, saving protective air, and maintaining corner accuracy, thus meeting the processing needs of metal plates with sharp corners on one side.

[0024] Please see Figure 4 , Figure 7 This invention provides a technical solution: a surface treatment device for metal sheets, including an air outlet 8 fixedly connected to the bottom end of an mounting plate 311 at the position corresponding to each second air outlet 312, allowing the regulated airflow to be accurately discharged, ensuring that the airflow is directionally delivered to the corresponding area, solving the problem that the number of air outlets 8 cannot be adapted to the dynamic changes of the fan speed adjustment and the fixed air inlet, and meeting the adjustment requirements of the air outlets 8 for single-sided corner protection. A slot 308 is opened on one side inner wall of a baffle 306, and the baffle 306 is slidably connected to a transition plate 309 through the slot 308, which can flexibly adjust the shielding range of the baffle 306, solving the problem of excessive airflow coverage in the three-sided area of ​​the bevel of the sheet, avoiding ineffective waste of protective gas, and improving the utilization of protective gas. The air outlets 8 and the second air outlets 312 are precisely corresponding, and the baffle 306 and the transition plate 309 are slidably engaged. The two work together to achieve both accurate airflow coverage of the single-sided corner and airflow shielding of the non-protected area, adapting to the surface treatment requirements of metal sheets with sharp corners on one side.

[0025] Please see Figure 4This invention provides a technical solution: a surface treatment device for metal sheets, comprising a transition plate 309 with a guide port 9 fixedly connected at the bottom end of each first air outlet 310, ensuring that the airflow is not deviated or scattered during transmission. This solves the problem that when adjusting the number of air outlets 8 to reinforce the protection of one-sided corners, it is difficult to accurately align the fixed air inlet with the core area of ​​the air outlet distribution, and airflow deviation is likely to occur. This ensures that the airflow is stably guided to the target area and avoids the risk of airflow deviation. A mounting groove is provided in the middle of the bottom end of the slot 308, and a rubber curtain 10 is fixedly connected to the inner wall of the mounting groove. When the baffle 306 moves, the guide port 9 can pass through the rubber curtain 10. At the same time, the rubber curtain 10 effectively seals the shielded area, preventing the airflow from diffusing to the three sides of the beveled edge of the sheet, and solving the problem of waste of protective air caused by excessive airflow coverage in the three sides of the beveled edge of the sheet.

[0026] Please see Figure 2 This invention provides a technical solution: a surface treatment device for metal sheets, including a drive wheel 313 with a diameter 1.5 times that of a transmission wheel 315, to adapt to the spacing ratio between the first air vent 310 and the second air vent 312. The drive wheel 313 and the transmission wheel 315 are configured to drive the corresponding threaded rod to adjust the position of the corrugated pipe 302 and the baffle 306 simultaneously, adapting to the spacing ratio between the first air vent 310 and the second air vent 312. This breaks the limitation of a fixed air inlet, solves the problems of a fixed air inlet position, inability to adapt to dynamic changes in the number of air outlets 8, and inability to achieve precise airflow coverage for single-sided corners.

[0027] Please see Figure 3 This invention provides a technical solution: a metal sheet surface treatment device, comprising a corrugated pipe 302 whose telescopic length is adapted to the maximum moving distance of the connecting frame 304 along the first threaded rod 305, and a soft pad 303 always in close contact with the top outer wall of the transition plate 309 to ensure airflow sealing between the corrugated pipe 302 and the transition plate 309. The telescopic length of the corrugated pipe 302 is adapted to the moving distance of the connecting frame 304 along the first threaded rod 305, and the soft pad 303 always in close contact with the transition plate 309, ensuring that the corrugated pipe 302 always fits the air outlet area during adjustment, breaking the fixed limitation of the air inlet position, and flexibly adapting to the dynamic changes of the air outlet. The matching moving distance of the corrugated pipe 302 and the connecting frame 304, combined with the continuous close contact and sealing of the soft pad 303, ensures that the airflow is always accurately focused on the core area of ​​the air outlet, without deviation or dispersion, solving the problem that it is difficult for a fixed air inlet to accurately align with the core area of ​​the air outlet distribution and that airflow deviation is easy to occur.

[0028] Please see Figure 2This invention provides a technical solution: a metal sheet surface treatment device, including a drive wheel 313 and a transmission wheel 315 connected by a transmission belt 314. When the motor 6 drives the drive wheel 313 to rotate, the rotation speed of the transmission wheel 315 is 1.5 times the rotation speed of the drive wheel 313. The travel of the first threaded rod 305 driving the connecting frame 304 and the travel of the second threaded rod 307 driving the baffle 306 are adapted to the spacing ratio of the first air outlet 310 and the second air outlet 312, ensuring that the airflow is delivered without deviation and loss, ensuring sufficient airflow supply to the air outlets corresponding to the corners, and solving the problems of insufficient airflow and insufficient protective gas coverage caused by airflow deviation at the air outlets corresponding to the corners.

[0029] Working principle: After the motor 6 starts, the power is transmitted to the drive wheel 313 through the second bevel gear 5 and the first bevel gear 4. The heat insulation block 7 is close to the heat treatment furnace body 1 to isolate the motor 6 from the high temperature. The drive wheel 313 is linked to the transmission wheel 315 through the transmission belt 314. Since the diameter of the drive wheel 313 is 1.5 times that of the transmission wheel 315, the transmission wheel 315 rotates synchronously at 1.5 times the speed, thereby driving the coaxial first threaded rod 305 and second threaded rod 307 to rotate synchronously, and the travel of the two is adapted to the distance between the first air outlet 310 and the second air outlet 312. The rotation of the first threaded rod 305 drives the connecting frame 304 to slide axially, so that the corrugated pipe 302 fixed to it can extend and retract synchronously. The bottom end of the corrugated pipe 302 The soft pad 303 always keeps in close contact with the transition plate 309 to ensure a seal. At the same time, the second threaded rod 307 drives the baffle 306 to slide along the slot 308 of the transition plate 309, so that the sliding position of the connecting frame 304 and the baffle 306 is precisely aligned. When the corrugated pipe 302 slides to the area corresponding to the first air outlet 310, the guide port 9 at the bottom of the transition plate 309 passes through the rubber curtain 10 at the bottom of the slot 308 and precisely connects with the second air outlet 312 of the mounting plate 311. The airflow enters the corrugated pipe 302 inside the mounting housing 301 through the pipe 2, passes through the first air outlet 310, the guide port 9, and the second air outlet 312 in sequence, and finally exits from the air outlet 8 at the bottom of the mounting plate 311, precisely covering the single-sided corner area of ​​the metal plate.

[0030] During this process, the transition plate 309 and the mounting plate 311 are both fixed to the inner wall of the mounting shell 301 to ensure stable position. The baffle 306 can cover the air vents corresponding to the three sides of the bevel of the plate. The rubber curtain 10 can seal the shielding area to avoid excessive airflow coverage and leakage, and finally achieve precise protection of the single-sided edge, solving the problems of airflow deviation, waste of protective gas, and edge oxidation and decarburization, chipping and slag shedding in the existing technology.

[0031] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A surface treatment apparatus for metal sheets, comprising a heat treatment furnace body (1), characterized in that: A pipe (2) is connected to one side of the top of the heat treatment furnace body (1), and a blower assembly (3) is connected to the bottom of the pipe (2). The blower assembly (3) includes a mounting shell (301) connected to the pipe (2). A corrugated pipe (302) is fixedly connected to the inner top wall of the mounting shell (301). A connecting frame (304) is fixedly connected to one side of the corrugated pipe (302). A first threaded rod (305) is threadedly connected to the inner wall of one side of the connecting frame (304). A transition plate (309) is slidably connected to the bottom of the connecting frame (304). A baffle (306) is slidably connected to the outer wall of the transition plate (309). The inner wall of the baffle (306) away from the first threaded rod (305) and close to the bottom is threaded with a second threaded rod (307). The first threaded rod (305) and the second threaded rod (307) are respectively fixedly connected to a drive wheel (313) and a transmission wheel (315). A transmission belt (314) is sleeved between the drive wheel (313) and the transmission wheel (315). The inner walls of the transition plate (309) and the mounting plate (311) are respectively provided with a first air vent (310) and a second air vent (312).

2. When the corrugated pipe (302) slides, the airflow coverage area can be adjusted. The baffle (306) can prevent the airflow from excessively covering the chamfered area. The distribution distance between the first air outlet (310) and the second air outlet (312) is adapted to the diameter of the drive wheel (313) and the transmission wheel (315) to achieve air outlet spacing adaptation and guidance, and avoid airflow deviation.

3. The metal sheet surface treatment apparatus as described in claim 1, characterized in that: A first bevel gear (4) is fixedly connected to one side of the drive wheel (313), a second bevel gear (5) is meshed with one side of the top of the first bevel gear (4), a motor (6) is fixedly connected to the middle of the second bevel gear (5), and a heat insulation block (7) is fixedly connected to one end of the motor (6) near the heat treatment furnace body (1).

4. The metal sheet surface treatment device as described in claim 2, characterized in that: The bottom end of the corrugated pipe (302) is fixedly connected to a soft pad (303), and the soft pad (303) is in contact with the top outer wall of the transition plate (309). The transition plate (309) and the mounting plate (311) are both fixedly connected to the inner wall of the mounting shell (301).

5. The metal sheet surface treatment apparatus as described in claim 3, characterized in that: The bottom end of the mounting plate (311) is fixedly connected with an air outlet (8) at the position corresponding to each second air outlet (312). A groove (308) is opened on one side inner wall of the baffle (306). The baffle (306) is slidably connected to the transition plate (309) through the groove (308).

6. The metal sheet surface treatment apparatus as described in claim 4, characterized in that: The bottom end of the transition plate (309) is fixedly connected with a guide port (9) at the position corresponding to each first air outlet (310). The bottom center of the slot (308) is provided with an installation groove, and a rubber curtain (10) is fixedly connected to the inner wall of the installation groove. When the baffle (306) moves, the guide port (9) can pass through the rubber curtain (10).

7. The metal sheet surface treatment apparatus as described in claim 5, characterized in that: The diameter of the drive wheel (313) is 1.5 times the diameter of the transmission wheel (315) to match the spacing ratio between the first air vent (310) and the second air vent (312).

8. The metal sheet surface treatment apparatus as described in claim 6, characterized in that: The drive wheel (313) and the transmission wheel (315) are connected by a transmission belt (314). When the motor (6) drives the drive wheel (313) to rotate, the speed of the transmission wheel (315) is 1.5 times the speed of the drive wheel (313). The travel of the first threaded rod (305) driving the connecting frame (304) and the travel of the second threaded rod (307) driving the baffle (306) are adapted to the spacing ratio of the first air vent (310) and the second air vent (312).

9. The metal sheet surface treatment apparatus as described in claim 7, characterized in that: The extension length of the corrugated pipe (302) is adapted to the maximum movement distance of the connecting frame (304) along the first threaded rod (305), and the soft pad (303) is always in close contact with the top outer wall of the transition plate (309) to ensure the airflow sealing between the corrugated pipe (302) and the transition plate (309).

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