Steel plate drying device

Abstract

The utility model relates to a steel plate drying device which comprises a drying box and a conveying assembly, the drying box is provided with a feeding port and a discharging port, the conveying assembly is used for conveying a steel plate from the feeding port to the discharging port, the drying box communicates with a plurality of hot air pipes, the other ends of the hot air pipes communicate with an air supply source, all the hot air pipes communicate with the air supply source, and the hot air pipes are connected with switching pieces. The switching piece is used for enabling any hot air pipe to be communicated and enabling the other hot air pipes to be closed. When the filter plate is cleaned or replaced, one hot air pipe is switched to another hot air pipe through the switching piece, and after the hot air pipes are cooled, the filter plate is disassembled and replaced, so that the filter plate in the hot air pipe to be cleaned is conveniently disassembled and assembled, the downtime generated by cleaning or replacing the filter plate is shortened, and the efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of steel plate pretreatment equipment, in particular to a steel plate drying device. BACKGROUND

[0002] When the steel plate is plated with aluminum zinc, the steel plate needs to be pretreated, and the surface of the steel plate is cleaned to reduce impurities on the surface of the steel plate. After cleaning, the steel plate is dried.

[0003] A steel plate drying device is disclosed in Chinese Patent No. CN206803672U, which comprises a conveying assembly for conveying the steel plate, the conveying assembly comprising a support, a plurality of transmission rollers rotatably connected to the support and spaced apart, and a drying box mounted on the conveying assembly for air drying the surface of the steel plate. The drying box is connected with a hot air assembly, the hot air assembly is connected with the upper and lower surfaces of the drying box, and the upper and lower air inlet sections are used for conveying hot air in the drying box. The technical solution is that the support is connected with a scraper assembly at the inlet end for removing moisture on the steel plate, the scraper assembly abuts against the steel plate and forms an inclined angle with the steel plate, and the support is connected with a cleaning assembly at the outlet end for wiping the steel plate. After a large amount of moisture is scraped off by the scraper assembly, air drying is performed to reduce the generation of water marks on the surface of the steel plate, and the steel plate is wiped by the cleaning assembly to eliminate the water marks on the surface of the steel plate.

[0004] In order to avoid impurities in the natural wind entering the drying box through the upper air inlet section or the lower air inlet section and adhering to the surface of the steel plate, a filter plate is usually arranged in the upper air inlet section and the lower air inlet section to reduce the impurities entering the drying box. After a long time of use, impurities are easily adhered to the surface of the filter plate. When the filter plate is cleaned or replaced, the upper air pipe and the lower air pipe need to be stopped to convey hot air into the drying box, and the hot air assembly needs to be stopped to dry the steel plate, which affects the drying efficiency. CONTENT OF THE UTILITY MODEL

[0005] In order to reduce downtime and improve drying efficiency, the present application provides a steel plate drying device.

[0006] The steel plate drying device provided by the present application adopts the following technical solution:

[0007] A steel plate drying device, comprising a drying box, a conveying assembly, the drying box being provided with an inlet and an outlet, the conveying assembly being arranged in the drying box, the conveying assembly being used for conveying the steel plate from the inlet to the outlet, the drying box being communicated with a plurality of hot air pipes, the other end of the hot air pipe being communicated with a air supply source, the air supply source inputting hot air into the hot air pipe, each hot air pipe being communicated with the air supply source, the hot air pipe being detachably connected with a filter plate, the hot air pipe being connected with a switching member, the switching member being used for connecting any hot air pipe and closing the remaining hot air pipes.

[0008] By adopting the above technical scheme, when the steel plate is dried, the air supply source inputs hot air into one hot air pipe, the hot air enters the drying box through the hot air pipe and dries the steel plate, the hot air passes through the filter plate to reduce impurities in the hot air and avoid impurities entering the drying box along with the hot air and adhering to the steel plate as much as possible, when the filter plate is cleaned or replaced, the switching piece is switched from using one hot air pipe to using another hot air pipe, and after the hot air pipe is cooled, the filter plate is disassembled and replaced, so that the disassembly and assembly of the filter plate in the hot air pipe to be cleaned are facilitated, the downtime caused by cleaning or replacing the filter plate is reduced, and the efficiency is improved.

[0009] Optionally, the hot air pipe comprises an air inlet section, a filter section and an air outlet section, the air inlet section, the filter section and the air outlet section are sequentially arranged and connected end to end along the hot air flow direction, one end of the air inlet section is communicated with the filter section, the other end of the air inlet section is communicated with the air supply source, one end of the air outlet section is communicated with the filter section, the other end of the air outlet section is communicated with the drying box, the filter plate is connected in the filter section, and the filter section is detachably connected to the air inlet section and the air outlet section at two ends thereof.

[0010] By adopting the above technical scheme, after long-term use, impurities are easily adhered to the surface of the filter plate, and the filter plate is easily blocked. When the filter plate is replaced or cleaned, the operator can prepare the filter section with a clean filter plate, disassemble the filter section to be disassembled from the air inlet section and the air outlet section at two ends thereof, and install the prepared filter section between the air inlet section and the air outlet section, so that the cleaning and replacement of the filter plate are more convenient and safe.

[0011] Optionally, the filter section is provided with an extension section near one end of the air outlet section, the extension section is communicated with the air outlet section and the filter section, one end of the extension section is connected with the air outlet section, and the other end of the extension section is detachably connected with the filter section.

[0012] By adopting the above technical scheme, when the filter section is disassembled, the filter section is disassembled from the extension section, and the extension section is shortened, so that the activity space of the filter section is increased, and the disassembly of the filter section is facilitated.

[0013] Optionally, the filter plate is provided with a scraping rod near one side of the air inlet section, the length direction of the scraping rod is consistent with the radial direction of the filter plate, the scraping rod is in contact with the filter plate, the air inlet section is connected with a rotating assembly, the rotating assembly is used to drive the scraping rod to rotate, and the rotating axis of the scraping rod is collinear with the central axis of the filter plate.

[0014] By adopting the above technical scheme, when in use, impurities are adhered to the surface of the filter plate, when the filter plate adheres to impurities, the rotating assembly drives the scraping rod to rotate, so that the scraping rod pushes the impurities on the surface of the filter plate, and the impurities blocking the filter plate are avoided as much as possible.

[0015] Optionally, the air inlet section is connected with a support block, the length direction of the support block is consistent with the radial direction of the filter plate, the rotating assembly comprises a first motor, a first gear and a second gear, the first gear and the second gear are arranged in the air inlet section, the first motor is connected to the side wall of the air inlet section, the first gear is connected to the output shaft of the first motor, the support block is rotatably connected with a support rod, the central axis of the support rod is collinear with the central axis of the filter plate, the second gear is sleeved on one end of the support rod, the other end of the support rod is connected with a scraping rod, and the first gear is engaged with the second gear.

[0016] By adopting the above technical scheme, the first motor drives the first gear to rotate, the second gear rotates following the first gear, the second gear drives the support rod to rotate, and the support rod drives the scraping rod to rotate, so that the scraping rod pushes the impurities on the surface of the filter plate.

[0017] Optionally, the scraping rod is connected with a sleeve away from the filter plate, the sleeve is threadedly sleeved on the support rod, and the central axis of the sleeve is collinear with the central axis of the support rod.

[0018] By adopting the above technical scheme, when the scraping rod is adhered with impurities, the scraping rod is rotated, the sleeve is rotated on the support rod, and the sleeve is away from the support rod, so that the scraping rod is convenient to clean and replace.

[0019] Optionally, the air supply source comprises a connecting pipe and a pressure pump, the two air inlet sections are communicated with the connecting pipe, the other end of the connecting pipe is communicated with an air source, the pressure pump is connected with the connecting pipe, the connecting pipe is communicated with a fresh air pipe, the fresh air pipe is used for inputting natural air into the connecting pipe, and the fresh air pipe is connected with an on-off valve and an air suction pump.

[0020] By adopting the above technical scheme, during the steel plate drying process, the temperature of the hot air input into the drying box is too high, which is easy to affect the quality of the steel plate, the fresh air pipe is additionally arranged, when the temperature of the hot air provided by the air supply source is too high, the fresh air pipe inputs natural air into the connecting pipe, so as to reduce the temperature of the hot air entering the drying box, and the influence of the too high temperature of the hot air on the quality of the steel plate is avoided as much as possible.

[0021] Optionally, a first temperature sensor is connected in the connecting pipe, the first temperature sensor is arranged on the side of the fresh air pipe away from the air inlet section, the first temperature sensor is electrically connected with a controller, the first temperature sensor is used to detect the temperature of the hot air in the connecting pipe and output a first temperature value, the controller is used to receive the first temperature value and compare it with a preset interval, a second temperature sensor is connected in the drying box, the second temperature sensor is electrically connected with the controller, the second temperature sensor is used to detect the temperature of the hot air in the drying box and output a second temperature value, the controller is used to receive the second temperature value and compare it with the preset interval, the on-off valve is electrically connected with the controller, the air pump is electrically connected with the controller, when the first temperature value is higher than the maximum value of the preset interval, the controller controls the on-off valve and the air pump to open, when the first temperature value is lower than the minimum value of the preset interval, the controller controls the on-off valve and the air pump to close, when the second temperature value is higher than the maximum value of the preset interval, the controller controls the air pump to increase the power, when the second temperature value is lower than the minimum value of the preset interval, the controller controls the air pump to reduce the power.

[0022] By adopting the above technical scheme, when the pressure pump inputs hot air into the connecting pipe, the first temperature sensor detects the temperature of the hot air in the connecting pipe and outputs a first temperature value, when the first temperature value is higher than the maximum value of the preset interval, the controller controls the on-off valve and the air pump to open, when the first temperature value is lower than the minimum value of the preset interval, the controller controls the on-off valve and the air pump to close, when the hot air enters the drying box through the air outlet section, the second temperature sensor detects the temperature of the hot air in the drying box and outputs a second temperature value, when the second temperature value is higher than the maximum value of the preset interval, the controller controls the air pump to increase the power, when the second temperature value is lower than the minimum value of the preset interval, the controller controls the air pump to reduce the power, so as to adjust the temperature of the hot air entering the drying box and avoid the temperature of the hot air being too high.

[0023] In summary, the present application has at least one of the following beneficial technical effects:

[0024] 1. When the steel plate is dried, the air supply source inputs hot air into a hot air pipe, the hot air enters the drying box through the hot air pipe and dries the steel plate, the hot air passes through the filter plate to reduce impurities in the hot air and avoid the impurities entering the drying box along with the hot air and adhering to the steel plate, when the filter plate is cleaned or replaced, the switching piece is used to switch from using one hot air pipe to using another hot air pipe, the filter plate is disassembled after the hot air pipe is cooled, and the filter plate is replaced, so as to facilitate the disassembly of the filter plate in the hot air pipe to be cleaned, reduce the downtime caused by cleaning or replacing the filter plate, and improve the efficiency.

[0025] 2. The temperature of the hot air input into the drying box is too high, which can affect the quality of the steel plate. The new air pipe is added. When the temperature of the hot air provided by the air supply source is too high, the new air pipe inputs natural air into the connecting pipe to reduce the temperature of the hot air entering the drying box, so as to avoid the influence of the high temperature of the hot air on the quality of the steel plate.

[0026] 3. The first temperature sensor detects the temperature of the hot air in the connecting pipe, and the second temperature sensor detects the temperature of the hot air in the drying box. The controller controls the air pump and the on-off valve to adjust the temperature of the hot air entering the drying box, so as to avoid the high temperature of the hot air. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a perspective view of the embodiment.

[0028] Figure 2 is a top view of the embodiment.

[0029] Figure 3 is a sectional view of the embodiment in A-A direction. Figure 2

[0030] Figure 4 is a sectional view of the embodiment in B-B direction. Figure 2

[0031] Figure 5 is a sectional view of the embodiment in C-C direction. Figure 2

[0032] Figure 6 is an enlarged view of part D of the embodiment. Figure 4

[0033] BRIEF DESCRIPTION OF DRAWINGS100, drying box; 110, feeding port; 120, discharging port; 130, air outlet; 140, communication pipe; 150, rotating roller; 160, second motor; 170, second temperature sensor; 200, hot air pipe; 210, air inlet section; 211, three-way valve; 212, support block; 213, mounting cavity; 214, support rod; 220, filter section; 230, air outlet section; 231, telescopic section; 240, filter plate; 250, new air pipe; 251, air pump; 252, on-off valve; 260, input pipe; 300, air supply source; 310, connecting pipe; 311, first temperature sensor; 320, pressure pump; 400, rotating assembly; 410, scraper rod; 411, sleeve; 420, first motor; 421, rotating rod; 430, first gear; 440, second gear. DETAILED DESCRIPTION

[0034] The application will be further described in detail below with reference to the accompanying drawings. Figures 1-6 The application will be further described in detail below with reference to the accompanying drawings.​​​

[0035] The embodiment of the present application discloses a steel plate drying device. Figure 1 and Figure 2 The steel plate drying device comprises a drying box 100 and a conveying assembly connected to the drying box 100.

[0036] Referring to Figure 1 and Figure 3 , the drying box 100 is horizontally provided with an inlet 110 and an outlet 120 at two ends along the length direction of the drying box 100. The length direction of the inlet 110 is consistent with the width direction of the drying box 100, and the length direction of the outlet 120 is consistent with the width direction of the drying box 100. The conveying assembly is used for conveying the steel plate from the inlet 110 to the outlet 120. The drying box 100 is horizontally provided with air outlets 130 at two side walls along the width direction of the drying box 100. The length direction of the air outlet 130 is consistent with the length direction of the drying box 100.

[0037] Referring to Figure 1 and Figure 4 , the drying box 100 is communicated with hot air pipes 200 at one side along the width direction of the drying box 100. The other end of the hot air pipe 200 is communicated with an air supply source 300. The air supply source 300 inputs hot air into the hot air pipe 200. The hot air pipe 200 is provided with two hot air pipes (the specific number can be selected according to actual needs). One end of the two hot air pipes 200 is communicated with the drying box 100, and the other end of the two hot air pipes 200 is communicated with the air supply source 300. The hot air pipe 200 is detachably connected with a filter plate 240. The circumferential side of the filter plate 240 is connected with the inner wall of the hot air pipe 200. The hot air pipe 200 is connected with a switching piece. The switching piece is used for connecting one hot air pipe 200 and closing the other hot air pipe 200.

[0038] When one filter plate 240 is replaced or cleaned, the switching piece switches to use the other hot air pipe 200. After the hot air pipe 200 to be cleaned is cooled for a period of time, the operator can carry out the cleaning or replacement work of the filter plate 240. The multiple hot air pipes 200 and filter plates 240 reduce the downtime and improve the work efficiency of the operator.

[0039] Referring to Figure 1 and Figure 2 , the air supply source 300 comprises connecting pipes 310 and a pressure pump 320. One end of the connecting pipe 310 is communicated with the two hot air pipes 200, and the other end of the connecting pipe 310 is communicated with the pressure pump 320.

[0040] Referring to Figure 1 and Figure 4 , the hot air pipe 200 comprises an air inlet section 210, a filter section 220 and an air outlet section 230. The air inlet section 210, the filter section 220 and the air outlet section 230 are connected in sequence. One end of the air inlet section 210 is communicated with the connecting pipe 310.

[0041] With reference to Figure 1 And Figure 4 , the air outlet section 230 is connected with the telescopic section 231 near one end of the filter section 220, the telescopic section 231 is provided as a bellows, and the telescopic section 231 communicates the air outlet section 230 with the filter section 220. One end of the telescopic section 231 is fixedly connected with the air outlet section 230, and the other end of the telescopic section 231 is detachably connected with one end of the filter section 220 through a flange, and the other end of the filter section 220 is detachably connected with the air inlet section 210 through a flange. The filter plate 240 is connected in the filter section 220, and the filter plate 240 is connected with the inner wall of the filter section 220 on the whole side. The air outlet section 230 is communicated with the drying box 100 through the input pipe 260 away from one end of the filter section 220.

[0042] When the filter section 220 is disassembled, the filter section 220 is disassembled from the air inlet section 210 and the telescopic section 231 at both ends, and the telescopic section 231 is shortened, so that the filter section 220 is taken out, and the filter plate 240 is cleaned and replaced.

[0043] With reference to Figure 1 And Figure 4 , the switching piece is provided as a three-way valve 211, and two three-way valves 211 are arranged, one three-way valve 211 is connected with the air inlet section 210, the three-way valve 211 is arranged at the communication position of the air inlet section 210 and the connecting pipe 310, and is used for controlling the communication of the connecting pipe 310 with one air inlet section 210 or the communication of the connecting pipe 310 with another air inlet section 210. The other three-way valve 211 is connected with the air outlet section 230, the three-way valve 211 is connected at the communication position of the air outlet section 230 and the input pipe 260, and the three-way valve 211 is used for controlling the communication of the input pipe 260 with one air outlet section 230 or the communication of the input pipe 260 with another air outlet section 230.

[0044] With reference to Figure 1 And Figure 4 , the air inlet section 210 is provided with the rotating assembly 400 near one side of the filter section 220, the rotating assembly 400 is connected with the scraping rod 410, and the rotating assembly 400 is used for driving the scraping rod 410 to rotate. The scraping rod 410 corresponds to the filter plate 240 one by one, and the scraping rod 410 is arranged in the filter section 220. The length direction of the scraping rod 410 is consistent with the radial direction of the filter plate 240, the scraping rod 410 is in contact with one side of the filter plate 240 close to the air inlet section 210, and the rotation axis of the scraping rod 410 is collinear with the central axis of the filter plate 240.

[0045] With reference to Figure 4The support block 212 is connected in the air inlet section 210, the length direction of the support block 212 is consistent with the radial direction of the filter plate 240, and the installation cavity 213 is arranged in the support block 212. The rotating assembly 400 comprises a first motor 420, a first gear 430 and a second gear 440. The first motor 420 is connected to the outer wall of the air inlet section 210, the output shaft of the first motor 420 extends to the installation cavity 213 along the length direction of the support block 212, and the output shaft of the first motor 420 is connected with a rotating rod 421, and the central axis of the rotating rod 421 is collinear with the central axis of the output shaft of the first motor 420.

[0046] Referring to Figure 4 The first gear 430 and the second gear 440 are arranged in the installation cavity 213, the first gear 430 is sleeved on the end of the rotating rod 421 away from the first motor 420, and the central axis of the first gear 430 is collinear with the central axis of the rotating rod 421. The support rod 214 is rotatably connected to the support block 212, the central axis of the support rod 214 is collinear with the central axis of the filter plate 240, one end of the support rod 214 is arranged in the installation cavity 213 along the length direction of the support rod 214, and the other end of the support rod 214 is connected with the scraping rod 410. The second gear 440 is sleeved on one end of the support rod 214, and the central axis of the second gear 440 is collinear with the central axis of the support rod 214. The first gear 430 is engaged with the second gear 440.

[0047] Referring to Figure 4 and Figure 6 The scraping rod 410 is connected with a sleeve 411 away from the filter plate 240, the central axis of the sleeve 411 is collinear with the central axis of the filter plate 240, the sleeve 411 is threadedly sleeved on the end of the support rod 214 away from the support block 212, and the central axis of the sleeve 411 is collinear with the central axis of the support rod 214.

[0048] The first motor 420 drives the first gear 430 to rotate, thereby driving the second gear 440 and the support rod 214 to rotate, and further driving the scraping rod 410 to rotate, so that the scraping rod 410 pushes the impurities on the surface of the filter plate 240, thereby avoiding the impurities from blocking the filter plate 240 as much as possible, and improving the efficiency of the hot air passing through the filter plate 240.

[0049] Referring to Figure 1 and Figure 2 The drying box 100 is communicated with two communication pipes 140 at both ends in the vertical direction, and the communication pipes 140 are arranged on one side of the drying box 100 along the width direction of the drying box 100. One end of the communication pipe 140 is communicated with the drying box 100, and the input pipe 260 is communicated with the communication pipe 140 away from the air outlet section 230. The ends of the four communication pipes 140 away from the drying box 100 are communicated with the input pipe 260.

[0050] The communication pipes 140 are provided with four, so that when the conveying assembly drives the steel plate to transport, the steel plate is dried by hot air blowing on both sides, so as to improve the drying efficiency. The pressure pump 320 controls the four communication pipes 140 at the same time, so that the hot air speed of the four communication pipes 140 discharged into the drying box 100 is consistent, so as to facilitate the control of the air speed of the hot air.

[0051] With reference to Figure 1 and Figure 5 , the connecting pipe 310 is communicated with the fresh air pipe 250, the fresh air pipe 250 is connected with the air suction pump 251, the fresh air pipe 250 is connected with the on-off valve 252, the on-off valve 252 is used to control the opening and closing of the fresh air pipe 250, and the fresh air pipe 250 is used to input natural wind into the connecting pipe 310. The first temperature sensor 311 is connected in the connecting pipe 310.

[0052] With reference to Figure 1 and Figure 5 , the first temperature sensor 311 is arranged on the side of the fresh air pipe 250 away from the air inlet section 210, the first temperature sensor 311 is electrically connected with the controller, the first temperature sensor 311 is used to detect the temperature of the hot air in the connecting pipe 310 and output the first temperature value, the controller is used to receive the first temperature value and compare with the preset interval, the controller is electrically connected with the on-off valve 252, and the controller is electrically connected with the air suction pump 251.

[0053] With reference to Figure 1 and Figure 3 , the drying box 100 is connected with the second temperature sensor 170, and the second temperature sensor 170 is close to the communication pipe 140 of the drying box 100. The second temperature sensor 170 is electrically connected with the controller, and the second temperature sensor 170 is used to detect the temperature of the hot air in the air outlet section 230 and output the second temperature value, and the controller is used to receive the second temperature value and compare with the preset interval. When the first temperature value is higher than the maximum value of the preset interval, the controller controls the on-off valve 252 and the air suction pump 251 to open, and when the first temperature value is lower than the minimum value of the preset interval, the controller controls the on-off valve 252 and the air suction pump 251 to close. When the second temperature value is higher than the maximum value of the preset interval, the controller controls the air suction pump 251 to increase the power, and when the second temperature value is lower than the minimum value of the preset interval, the controller controls the air suction pump 251 to reduce the power. The first temperature sensor 311 and the second temperature sensor 170 are both PT100, and the controller is PLC.

[0054] With reference to Figure 2 and Figure 3The conveying assembly comprises a plurality of rotating rollers 150 which are sequentially and spacedly arranged along the length direction of the drying box 100, and are rotatably connected to the drying box 100. The length direction of the rotating rollers 150 is consistent with the width direction of the drying box 100. The rotating rollers 150 are rotatably connected to the corresponding side inner walls of the drying box 100 at both ends along the length direction thereof. The rotating rollers 150 are all connected with a second motor 160. The second motor 160 is connected to the side wall of the drying box 100. The output shaft of the second motor 160 is connected with one end of the rotating roller 150.

[0055] The implementation principle of the steel plate drying device is as follows: in use, one hot air pipe 200 is connected with the air supply source 300 and the drying box 100 respectively. When the filter plate 240 needs to be cleaned or replaced, the three-way valve 211 controls the connecting pipe 310 to be connected with another hot air pipe 200, and the three-way valve 211 controls the input pipe 260 to be connected with another hot air pipe 200, so that the filter section 220 to be disassembled is not passed through by hot air. When the filter section 220 is disassembled, the filter section 220 is disassembled from the air inlet section 210 and the telescopic section 231 respectively at both ends, and the telescopic section 231 is shortened along the length direction thereof, so as to facilitate the disassembly of the filter section 220 and the replacement or cleaning of the filter plate 240. When one of the filter sections 220 is disassembled, the other hot air pipe 200 is still in use, so as to reduce the downtime required when the filter section 220 is disassembled and improve the work efficiency. The above is the preferred embodiment of the present application, but does not limit the protection scope of the present application. Therefore, equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A steel plate drying device, comprising a drying box (100) and a conveying assembly, wherein the drying box (100) is provided with a feed port (110) and a discharge port (120), the conveying assembly being arranged in the drying box (100) and used for conveying the steel plate from the feed port (110) to the discharge port (120), characterized in that: The drying box (100) is communicated with several hot air pipes (200), one end of the hot air pipe (200) is communicated with the air supply source (300), the air supply source (300) inputs hot air to the hot air pipe (200), each hot air pipe (200) is communicated with the air supply source (300), and the hot air pipe (200) is detachably connected with the filter plate (240).

2. A steel sheet drying device according to claim 1, characterized by: The hot air pipe (200) comprises an air inlet section (210), a filter section (220) and an air outlet section (230), the air inlet section (210), the filter section (220) and the air outlet section (230) are sequentially distributed and connected end to end along the hot air flow direction, one end of the air inlet section (210) is communicated with the filter section (220), the other end of the air inlet section (210) is communicated with the air supply source (300), one end of the air outlet section (230) is communicated with the filter section (220), the other end of the air outlet section (230) is communicated with the drying box (100), the filter plate (240) is connected in the filter section (220), and the filter section (220) is detachably connected with the air inlet section (210) and the air outlet section (230) at both ends.

3. A steel sheet drying device according to claim 2, characterized by: The filter section (220) is provided with an expansion section (231) near one end of the air outlet section (230), the expansion section (231) is communicated with the air outlet section (230) and the filter section (220), one end of the expansion section (231) is connected with the air outlet section (230), and the other end of the expansion section (231) is detachably connected with the filter section (220).

4. A steel sheet drying device according to claim 2, characterized by: The filter plate (240) is provided with a scraping rod (410) near one side of the air inlet section (210), the length direction of the scraping rod (410) is consistent with the radial direction of the filter plate (240), the scraping rod (410) is in contact with the filter plate (240), the air inlet section (210) is connected with a rotating assembly (400), the rotating assembly (400) is used for driving the scraping rod (410) to rotate, and the rotating axis of the scraping rod (410) is collinear with the central axis of the filter plate (240).

5. A steel sheet drying device according to claim 4, characterized by: The air inlet section (210) is connected with a support block (212), the length direction of the support block (212) is consistent with the radial direction of the filter plate (240), the rotating assembly (400) comprises a first motor (420), a first gear (430) and a second gear (440), the first gear (430) and the second gear (440) are arranged in the air inlet section (210), the first motor (420) is connected to the side wall of the air inlet section (210), the first gear (430) is connected to the output shaft of the first motor (420), the support block (212) is rotatably connected with a support rod (214), the central axis of the support rod (214) is collinear with the central axis of the filter plate (240), the second gear (440) is sleeved on one end of the support rod (214), the other end of the support rod (214) is connected with a scraping rod (410), and the first gear (430) is engaged with the second gear (440).

6. A steel sheet drying device according to claim 5, characterized by: The scraping rod (410) is connected with a sleeve (411) away from one side of the filter plate (240), the sleeve (411) is threadedly sleeved on the support rod (214), and the central axis of the sleeve (411) is collinear with the central axis of the support rod (214).

7. A steel sheet drying device according to claim 2, characterized by: The air supply source (300) comprises a connecting pipe (310) and a pressure pump (320), the two air inlet sections (210) are communicated with the connecting pipe (310), the other end of the connecting pipe (310) is communicated with an air source, the pressure pump (320) is connected with the connecting pipe (310), the connecting pipe (310) is communicated with a fresh air pipe (250), the fresh air pipe (250) is used for inputting natural wind into the connecting pipe (310), the fresh air pipe (250) is connected with an on-off valve (252) and a suction pump (251), and the on-off valve (252) is used for controlling the opening or closing of the fresh air pipe (250).

8. A steel sheet drying device according to claim 7, characterized by: The connecting pipe (310) is connected with a first temperature sensor (311), the first temperature sensor (311) is arranged on the side of the fresh air pipe (250) away from the air inlet section (210), the first temperature sensor (311) is electrically connected with a controller, the first temperature sensor (311) is used for detecting the temperature of the hot air in the connecting pipe (310) and outputting a first temperature value, the controller is used for receiving the first temperature value and comparing with a preset interval, a second temperature sensor (170) is connected in the drying box (100), the second temperature sensor (170) is electrically connected with the controller, the second temperature sensor (170) is used for detecting the temperature of the hot air in the drying box (100) and outputting a second temperature value, the controller is used for receiving the second temperature value and comparing with a preset interval, the on-off valve (252) is electrically connected with the controller, the air pump (251) is electrically connected with the controller, when the first temperature value is higher than the maximum value of the preset interval, the controller controls the on-off valve (252) and the air pump (251) to open, when the first temperature value is lower than the minimum value of the preset interval, the controller controls the on-off valve (252) and the air pump (251) to close, when the second temperature value is higher than the maximum value of the preset interval, the controller controls the air pump (251) to increase the power, when the second temperature value is lower than the minimum value of the preset interval, the controller controls the air pump (251) to reduce the power.

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