A continuous coating drying tunnel device

Abstract

This invention relates to the field of coating tunnel drying technology and discloses a continuous coating tunnel drying device, including a drying box and a tunnel cavity disposed inside the drying box. A partition plate is fixedly installed on the inner wall of the tunnel cavity. Material inlets are provided at both ends of the drying box and on the sides of the partition plate. Two exhaust hoods are symmetrically arranged through the inner top and bottom surfaces of the tunnel cavity. The tunnel cavity is configured as a preheating chamber and a drying chamber on both sides of the partition plate. This invention optimizes airflow circulation within the tunnel by using an inclined hot air drying nozzle, guide plates, and a material inlet width adjustment structure. After the hot air is discharged from the inclined hot air nozzle, it is guided by guide plates one and two into the exhaust hood, forming a stable hot airflow path. This avoids eddies or stagnant airflow areas at the source. Simultaneously, during material inlet adjustment, the connecting plate moves the magnetic plate two, pushing the baffle to block excess air outlets, ensuring that the hot air range matches the substrate width, guaranteeing that hot air flows along the substrate, improving drying uniformity, and reducing defects such as coating blistering and cracking.

Description

Technical Field

[0001] This invention relates to the field of coating tunnel drying technology, and more particularly to a continuous coating tunnel drying apparatus. Background Technology

[0002] Continuous coating drying tunnels are automated drying equipment used in coating processes (such as coating the surface of substrates like films, paper, and metal foils with adhesives, inks, or functional coatings). They continuously transport the substrate and use specific heat sources (such as hot air, infrared, or microwave) in a closed drying tunnel to perform gradient heating and drying of the coating, ultimately achieving coating curing and shaping. They are widely used in industries such as packaging printing, electronic films, and lithium battery electrodes.

[0003] A search revealed that Chinese patent CN107906871A discloses a screen printing coating drying device, including a transmission chamber. Inside the transmission chamber, a motor is fixed via a support frame. The bottom end of the support frame is welded to the inside of the transmission chamber. A power input shaft is fixedly connected to the upper end of the motor. A drive gear is welded to the side of the power input shaft near the upper end. The drive gear is connected to a driven gear via a toothed belt. A rotating shaft is fixed at the center of the driven gear and fixed at the center of a fixed plate. A bearing is embedded at the center of the fixed plate. A coarse-perforated mesh is fixed below the fan blades, and a connecting post is fixedly connected below the coarse-perforated mesh via a heat insulation plate. A simple mechanical transmission device inside drives the fan to rotate, generating airflow that evenly blows the heat generated by the swirling electric heating element onto the coating, thus achieving rapid and uniform drying. However, this solution still has the following shortcomings in practical use:

[0004] In the actual production process of coating drying, the drying tunnel, as the core drying area, directly determines the coating drying quality due to the uniformity of its internal airflow distribution and temperature field. However, the existing drying tunnel structure has problems such as uneven airflow distribution and dead zones in the temperature field, which in turn leads to a series of coating defects. Specifically, the above-mentioned drying tunnel uses a fixed air duct for air supply. After the hot air is discharged from the air outlet, it is easy to form vortices or airflow stagnation areas on both sides and at both ends of the drying tunnel. This results in significant differences in airflow velocity and heat contact intensity between the edge and center of the substrate in the width direction, which can easily lead to differences in drying rate between the edge and center of the substrate and between the coating surface and the interior, resulting in problems such as coating blistering, cracking, and uneven gloss.

[0005] Therefore, a new continuous coating drying tunnel device needs to be designed to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a continuous coating drying tunnel device.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A continuous coating drying tunnel device includes a drying chamber and a drying tunnel cavity disposed inside the drying chamber. A partition plate is fixedly installed on the inner wall of the drying tunnel cavity. Material inlets are provided at both ends of the drying chamber and on the sides of the partition plate. Two exhaust hoods are symmetrically arranged through the inner top and bottom surfaces of the drying tunnel cavity. The drying tunnel cavity is respectively configured as a preheating chamber and a drying chamber on both sides of the partition plate. Two sets of flow guiding structures are symmetrically arranged on the inner sides of the preheating chamber and the drying chamber. An adjustment component is provided on the inner side of the material inlet. Two sets of hot air pipes, arranged in a linear array, are symmetrically fixedly installed on the inner walls of the preheating chamber and the drying chamber. A hot air drying component is provided on the outer wall of the hot air pipes. A filter frame is provided on the inner wall of the exhaust hood. A material turning component is provided on the inner side of the filter frame. A drive component corresponding to the material turning component is provided on the inner wall of the drying tunnel cavity.

[0009] The flow guiding structure includes a fixed plate fixedly installed on the inner wall of the preheating chamber and the drying chamber. A first flow guiding plate is fixedly installed on the inner wall of the preheating chamber and the drying chamber at the end of the fixed plate. A second flow guiding plate corresponding to the exhaust hood is fixedly installed on the inner top surface of the preheating chamber and the drying chamber.

[0010] As a preferred embodiment of the present invention, the cross-sectional shape of the first guide plate is semi-circular, and the cross-sectional shape of the second guide plate is quarter-circular.

[0011] As a preferred embodiment of the present invention, the adjustment assembly includes six mounting slots, which are symmetrically opened on both sides of the inner wall of the material inlet. An adjustment plate is slidably installed on the inner wall of each mounting slot. The ends of three adjustment plates on the same side located outside the mounting slot are connected by a connecting plate. An adjustment screw corresponding to the material inlet is rotatably installed at one end of the drying box. A connecting frame that is screwed to the adjustment screw is fixedly installed at the ends of two adjustment plates.

[0012] As a preferred embodiment of the present invention, the threads on both sides of the outer wall of the adjusting screw are in opposite directions.

[0013] As a preferred embodiment of the present invention, the hot air drying assembly includes a hot air drying nozzle that penetrates the outer wall of a hot air duct. A plurality of air duct plates arranged in a linear array are fixedly installed on the inner wall of the hot air drying nozzle. An air outlet cavity is provided between the plurality of air duct plates. A baffle is slidably installed on the inner wall of each of the air outlet cavities located at both ends. One end of each baffle passes through the side of the hot air drying nozzle and is fixedly fitted with a magnetic sheet. Two springs are fixedly installed between the side of the magnetic sheet and the side of the hot air drying nozzle, and the two springs are symmetrical about the baffle. A support rod is fixedly installed on the top surface of the connecting plate, and a magnetic sheet corresponding to one of the magnetic sheets is fixedly installed at the top end of the support rod.

[0014] As a preferred embodiment of the present invention, the magnetic poles of magnetic sheet one and magnetic sheet two are the same.

[0015] As a preferred embodiment of the present invention, the material turning assembly includes two sliding plates symmetrically slidably mounted on the inner wall of the filter frame. A plurality of evenly distributed levers are fixedly mounted between the opposite sides of the two sliding plates. The bottom surface of the filter frame is symmetrically opened with two clearance openings corresponding to the sliding plates. A transmission plate is fixedly mounted on the bottom surface of the sliding plates, and the bottom end of the transmission plate passes through the clearance opening. A spring is fixedly mounted between the side of the transmission plate and the inner wall of the clearance opening.

[0016] As a preferred embodiment of the present invention, the drive assembly includes two mounting plates symmetrically fixedly installed on the bottom surface of the filter frame. A shaft is rotatably installed between the opposite sides of the two mounting plates. A drive blade is fixedly fitted on the outer wall of the shaft. A drive plate corresponding to the transmission plate is fixedly installed at both ends of the shaft. Two indicator boxes corresponding to the shaft are fixedly installed on the side of the drying oven. An indicator structure is provided on the inner side of the indicator box.

[0017] As a preferred embodiment of the present invention, the indicating structure includes a drive gear rotatably mounted on the inner wall of the indicating box, one end of the shaft passing through the side of the mounting plate and fixedly mounted with a transmission shaft, the end of the transmission shaft being fixedly connected to the side of the drive gear, a reduction gear meshing with the drive gear being rotatably mounted on the inner wall of the indicating box, a reciprocating screw being fixedly mounted on the side of the reduction gear, a guide opening being provided on the top surface of the indicating box, an indicating plate being slidably mounted on the inner wall of the guide opening, and the bottom end of the indicating plate being screwed to the outer wall of the reciprocating screw through a threaded ring.

[0018] As a preferred embodiment of the present invention, the top surface of the indicator box is provided with scale markings corresponding to the indicator plate.

[0019] The present invention has the following beneficial effects:

[0020] 1. In this invention, the airflow circulation in the drying tunnel is optimized by tilting the hot air drying nozzle, the guide plate, and the material outlet width adjustment structure. After the hot air drying nozzle tilts and discharges air, it is guided into the exhaust hood by the first and second guide plates, forming a stable hot airflow path. This avoids eddies or airflow stagnation areas from the source. At the same time, when the material outlet is adjusted, the connecting plate drives the second magnetic sheet to move, which repulses the first magnetic sheet and pushes the baffle to block the excess air outlet cavity. This makes the hot air range match the width of the substrate, ensuring that the hot air flows along the substrate, improving drying uniformity, and reducing defects such as coating blistering and cracking.

[0021] 2. In this invention, during the hot air circulation process, the airflow drives the drive blade and shaft to rotate. The shaft periodically moves the transmission plate through the drive plate. The transmission plate slides back and forth under the action of the second spring, which drives the lever to flip the activated carbon particles in the filter frame, avoiding local adsorption saturation of the activated carbon, allowing the particles to fully contact the exhaust gas, enhancing the preliminary filtration capacity of solvent vapor, reducing the emission of harmful gases, and eliminating the need for frequent manual flipping, thus reducing maintenance costs.

[0022] 3. In this invention, when the shaft rotates, it drives the reciprocating screw to rotate through the transmission shaft and gear set, causing the indicator plate to slide along the guide opening of the indicator box. The staff can intuitively understand the use and turnover of activated carbon particles through the scale on the top surface of the indicator box, and accurately judge the replacement time. This design avoids the decrease in filtration effect due to activated carbon failure, and also prevents premature replacement and waste, ensuring continuous and stable waste gas treatment and improving the convenience of equipment operation and maintenance. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a continuous coating drying tunnel device proposed in this invention.

[0024] Figure 2 This is a schematic diagram of the drying tunnel structure of a continuous coating drying tunnel device proposed in this invention;

[0025] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0026] Figure 4 This is a front view schematic diagram of the drying tunnel cavity of a continuous coating drying device proposed in this invention;

[0027] Figure 5 This is a schematic diagram of the hot air drying nozzle structure of a continuous coating drying tunnel device proposed in this invention.

[0028] Figure 6 for Figure 5 Enlarged structural diagram at point B;

[0029] Figure 7 This is a schematic diagram of the inner structure of the hot air drying nozzle of a continuous coating drying tunnel device proposed in this invention.

[0030] Figure 8 This is a schematic diagram of the exhaust hood and indicator box structure of a continuous coating drying tunnel device proposed in this invention;

[0031] Figure 9 for Figure 8 Enlarged structural diagram at point C;

[0032] Figure 10This is a schematic diagram of the inner structure of the filter frame of a continuous coating drying tunnel device proposed in this invention.

[0033] Figure 11 for Figure 10 Enlarged structural diagram at point D.

[0034] In the diagram: 11. Drying oven; 12. Drying tunnel; 13. Material inlet; 14. Exhaust hood; 21. Fixing plate; 22. Guide plate one; 23. Guide plate two; 31. Mounting slot; 32. Adjusting plate; 33. Adjusting screw; 34. Connecting frame; 35. Connecting plate; 41. Hot air duct; 42. Hot air drying nozzle; 43. Air duct plate; 44. Air outlet cavity; 45. Baffle; 46. Magnetic sheet one; 47. Spring 48. Spring 1; 49. Support rod; 50. Magnetic sheet 2; 51. Filter frame; 52. Slide plate; 53. Toggle lever; 54. Clearance opening; 55. Transmission plate; 56. Spring 2; 61. Mounting plate; 62. Shaft; 63. Drive blade; 64. Drive plate; 71. Indicator box; 72. Drive gear; 73. Transmission shaft; 74. Reduction gear; 75. Reciprocating screw; 76. Guide opening; 77. Indicator plate. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0036] Reference Figure 1-11 A continuous coating drying tunnel device includes a drying chamber 11 and a drying tunnel 12 disposed inside the drying chamber 11. A partition plate is fixedly installed on the inner wall of the drying tunnel 12. Material inlets 13 are opened at both ends of the drying chamber 11 and on the side of the partition plate. Two exhaust hoods 14 are symmetrically arranged through the inner top and inner bottom surfaces of the drying tunnel 12. The drying tunnel 12 is respectively configured as a preheating chamber and a drying chamber on both sides of the partition plate. Two sets of flow guiding structures are symmetrically arranged on the inner side of the preheating chamber and the drying chamber. Two sets of hot air pipes 41, which are linearly arrayed, are symmetrically fixedly installed on the inner wall of the preheating chamber and the drying chamber. A filter frame 51 is provided on the inner wall of the exhaust hood 14.

[0037] The flow guiding structure includes a fixed plate 21 fixedly installed on the inner wall of the preheating chamber and the drying chamber. A flow guiding plate 22 is fixedly installed on the inner wall of the preheating chamber and the drying chamber at the end of the fixed plate 21. The cross-sectional shape of the flow guiding plate 22 is semi-circular. A flow guiding plate 23 corresponding to the exhaust hood 14 is fixedly installed on the inner top surface of the preheating chamber and the drying chamber. The cross-sectional shape of the flow guiding plate 23 is quarter-circular.

[0038] In use, the substrate coated by the fully automatic coating machine enters the drying chamber 12 inside the drying chamber 11 through the feed port 13. The substrate is pulled by the traction device and moves in the drying chamber 12. During the movement, the hot air pipe 41 and the hot air drying nozzle 42 spray hot air evenly to dry the substrate. Since the hot air drying nozzle 42 is inclined, the sprayed hot air can be guided by the first guide plate 22 and the second guide plate 23 after passing over the surface of the substrate, and finally enters the exhaust hood 14 for discharge. This forms a circulation of hot air in the preheating chamber and the drying chamber to dry the substrate and avoids eddies or airflow stagnation in the drying chamber 12.

[0039] The adjustment assembly includes six mounting slots 31, which are symmetrically opened on both sides of the inner wall of the feed inlet 13. An adjustment plate 32 is slidably installed on the inner wall of each mounting slot 31. The three adjustment plates 32 on the same side are fixedly connected to one end of the outer side of the mounting slot 31 by a connecting plate 35. An adjustment screw 33 corresponding to the feed inlet 13 is rotatably installed on one end of the drying box 11. The threads on both sides of the outer wall of the adjustment screw 33 are opposite in direction. A connecting bracket 34 that is screwed to the adjustment screw 33 is fixedly installed at the ends of the two adjustment plates 32.

[0040] Before the substrate enters the drying oven 11, the operator needs to adjust the width of the feed inlet 13. During adjustment, the adjusting screw 33 can be rotated. Since the adjusting plate 32 is slidably installed inside the mounting groove 31, and the end of the adjusting plate 32 is screwed to the adjusting screw 33 through the connecting bracket 34, and the threads on both sides of the outer wall of the adjusting screw 33 are in opposite directions, when the adjusting screw 33 is rotated, it can drive the two connecting brackets 34 and the adjusting plate 32 to slide in opposite directions along the mounting groove 31, thereby adjusting the width of the feed inlet 13 so that the width of the feed inlet 13 can correspond to the width of the substrate.

[0041] A hot air drying assembly is provided on the outer wall of the hot air duct 41. The hot air drying assembly includes a hot air drying nozzle 42 that passes through the outer wall of the hot air duct 41. Several air duct plates 43 arranged in a linear array are fixedly installed on the inner wall of the hot air drying nozzle 42. An air outlet cavity 44 is provided between the several air duct plates 43. A baffle 45 is slidably installed on the inner wall of the several air outlet cavities 44 located at both ends. One end of the baffle 45 passes through the side of the hot air drying nozzle 42 and is fixedly installed with a magnetic sheet 46. Two springs 47 are symmetrically fixedly installed between the side of the magnetic sheet 46 and the side of the hot air drying nozzle 42. A support rod 48 is fixedly installed on the top surface of the connecting plate 35. A magnetic sheet 49 corresponding to the several magnetic sheets 46 is fixedly installed at the top of the support rod 48. The magnetic poles of the magnetic sheets 46 and the magnetic sheet 49 are the same.

[0042] During the adjustment of the adjustment plate 32, the connecting plate 35 between the adjustment plates 32 can move synchronously, and the magnetic sheet 49 at the end of the support rod 48 on the connecting plate 35 can move accordingly. As the magnetic sheet 49 moves from the initial position, it can sweep over several magnetic sheets 46 in sequence. Since the magnetic poles of magnetic sheet 46 and magnetic sheet 49 are the same, magnetic sheet 46 and baffle 45 can slide under the action of repulsive magnetic force, thereby blocking the air outlet cavity 44 between the air duct plates 43, so that the range of the air outlet cavity 44 inside the hot air drying nozzle 42 can meet the width of the substrate, so that hot air can flow along the substrate to form circulation.

[0043] The filter frame 51 is provided with a material turning assembly. The material turning assembly includes two slide plates 52 that are symmetrically slidably installed on the inner wall of the filter frame 51. Several evenly distributed levers 53 are fixedly installed between the opposite sides of the two slide plates 52. The bottom surface of the filter frame 51 is symmetrically opened with two clearance openings 54 corresponding to the slide plates 52. A transmission plate 55 is fixedly installed on the bottom surface of the slide plates 52, and the bottom end of the transmission plate 55 passes through the clearance opening 54. A spring 56 is fixedly installed between the side of the transmission plate 55 and the inner wall of the clearance opening 54.

[0044] The inner wall of the drying chamber 12 is provided with a drive assembly corresponding to the material turning assembly. The drive assembly includes two mounting plates 61 symmetrically fixedly installed on the bottom surface of the filter frame 51. A shaft 62 is rotatably installed between the opposite sides of the two mounting plates 61. A drive blade 63 is fixedly fitted on the outer wall of the shaft 62. A drive plate 64 corresponding to the transmission plate 55 is fixedly installed at both ends of the shaft 62. Two indicator boxes 71 corresponding to the shaft 62 are fixedly installed on the side of the drying chamber 11. An indicator structure is provided on the inner side of the indicator box 71.

[0045] During the hot air circulation process, the drive blades 63 on the shaft 62 can be driven to rotate, causing the shaft 62 to rotate. The two drive plates 64 at both ends of the shaft 62 can rotate synchronously. During the rotation of the drive plate 64 with the shaft 62, it can move the transmission plate 55, causing the transmission plate 55 to slide along the relief opening 54. When the drive plate 64 separates from the transmission plate 55, the transmission plate 55 can be reset under the action of the second spring 56, thereby driving the slide plate 52 and the lever 53 to slide back and forth. The inner side of the filter frame 51 is filled with activated carbon particles. During the sliding of the lever 53, the activated carbon particles can be turned over, so that the activated carbon particles can fully achieve preliminary filtration of the exhaust gas.

[0046] The indicating structure includes a drive gear 72 rotatably mounted on the inner wall of the indicating box 71, one end of a shaft 62 passing through the side of the mounting plate 61 and fixedly mounted with a transmission shaft 73, the end of the transmission shaft 73 being fixedly connected to the side of the drive gear 72, a reduction gear 74 meshing with the drive gear 72 being rotatably mounted on the inner wall of the indicating box 71, a reciprocating screw 75 being fixedly mounted on the side of the reduction gear 74, a guide opening 76 being provided on the top surface of the indicating box 71, an indicating plate 77 being slidably mounted on the inner wall of the guide opening 76, and the bottom end of the indicating plate 77 being screwed to the outer wall of the reciprocating screw 75 through a threaded ring, and a scale marking corresponding to the indicating plate 77 being provided on the top surface of the indicating box 71.

[0047] When shaft 62 rotates, it can drive drive gear 72 to rotate through transmission shaft 73. Drive gear 72 meshes with reduction gear 74, which in turn drives reduction gear 74 and reciprocating screw 75 to rotate. Indicator plate 77 is screwed to reciprocating screw 75 through threaded ring, and indicator plate 77 is slidably connected to the inner wall of guide port 76 on indicator box 71. Therefore, when reciprocating screw 75 rotates, it can drive indicator plate 77 to slide along guide port 76. The scale markings on the top surface of indicator box 71 can be used to understand the usage and turnover of activated carbon particles in filter frame 51, so that staff can replace activated carbon particles in filter frame 51 in a timely manner.

[0048] The specific working principle of this invention is as follows:

[0049] In use, the substrate coated by the fully automatic coating machine enters the drying chamber 12 inside the drying oven 11 through the feed port 13. The substrate is pulled and moved in the drying chamber 12 by the traction device. During the movement, hot air is evenly sprayed out from the hot air pipe 41 and the hot air drying nozzle 42 to dry the substrate. Since the hot air drying nozzle 42 is inclined, the sprayed hot air is guided by the first guide plate 22 and the second guide plate 23 after passing over the surface of the substrate, and finally enters the exhaust hood 14 for discharge. This forms a circulation of hot air in the preheating chamber and the drying chamber to dry the substrate and avoid the drying chamber 11 from drying out. 2. A vortex or airflow stagnation zone appears inside; before the substrate enters the drying oven 11, the operator needs to adjust the width of the feed inlet 13. During adjustment, the adjusting screw 33 can be rotated. Since the adjusting plate 32 is slidably installed inside the mounting groove 31, and the end of the adjusting plate 32 is screwed to the adjusting screw 33 through the connecting bracket 34, and the threads on both sides of the outer wall of the adjusting screw 33 are opposite, when the adjusting screw 33 is rotated, it can drive the two connecting brackets 34 and the adjusting plate 32 to slide in opposite directions along the mounting groove 31, thereby realizing the adjustment of the width of the feed inlet 13 so that the width of the feed inlet 13 can correspond to the width of the substrate.

[0050] During the adjustment of the adjusting plate 32, the connecting plate 35 between the adjusting plates 32 can move synchronously, and the magnetic piece 49 at the end of the support rod 48 on the connecting plate 35 can move accordingly. As the magnetic piece 49 moves from its initial position, it can gradually become relative to the magnetic piece 46. Since the magnetic poles of the magnetic piece 46 and the magnetic piece 49 are the same, the magnetic piece 46 and the baffle 45 can slide under the action of repulsive magnetic force, thereby blocking the air outlet cavity 44 between the air duct plates 43, so that the range of the air outlet cavity 44 can conform to the width of the substrate, so that hot air can flow along the substrate to form circulation; during the circulation of hot air, the shaft 62 can be driven. The drive blade 63 rotates, causing the shaft 62 to rotate. The two drive plates 64 at both ends of the shaft 62 can rotate synchronously. During the rotation of the drive plate 64 with the shaft 62, it can move the transmission plate 55, causing the transmission plate 55 to slide along the relief opening 54. When the drive plate 64 separates from the transmission plate 55, the transmission plate 55 can be reset under the action of the second spring 56, thereby driving the slide plate 52 and the lever 53 to slide back and forth. The inner side of the filter frame 51 is filled with activated carbon particles. During the sliding of the lever 53, the activated carbon particles can be turned over, so that the activated carbon particles can fully achieve preliminary filtration of the exhaust gas.

[0051] Simultaneously, when the shaft 62 rotates, it can drive the drive gear 72 to rotate through the transmission shaft 73. The drive gear 72 meshes with the reduction gear 74, which in turn drives the reduction gear 74 and the reciprocating screw 75 to rotate. The indicator plate 77 is screwed to the reciprocating screw 75 through a threaded ring, and the indicator plate 77 is slidably connected to the inner wall of the guide port 76 on the indicator box 71. Therefore, when the reciprocating screw 75 rotates, it can drive the indicator plate 77 to slide along the guide port 76. The scale markings on the top surface of the indicator box 71 can be used to understand the usage and turnover status of the activated carbon particles in the filter frame 51, so that the staff can replace the activated carbon particles in the filter frame 51 in a timely manner.

[0052] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A continuous coating drying device, comprising a drying box (11) and a drying tunnel cavity (12) arranged inside the drying box (11), the inner wall of the drying tunnel cavity (12) is fixedly installed with a partition plate, the two ends of the drying box (11) and the side surface of the partition plate are both provided with a material port (13), the inner top surface and the inner bottom surface of the drying tunnel cavity (12) are both symmetrically provided with two exhaust hoods (14), characterized in that, The drying cavity (12) is located on both sides of the partition plate and is provided with a preheating cavity and a drying cavity, respectively, the inner sides of the preheating cavity and the drying cavity are symmetrically provided with two groups of flow guide structures, the inner side of the material opening (13) is provided with an adjusting assembly, the inner walls of the preheating cavity and the drying cavity are symmetrically fixedly installed with two groups of hot air pipes (41) which are linearly arranged, the outer wall of the hot air pipe (41) is provided with a hot air drying assembly, the inner wall of the exhaust cover (14) is provided with a filter frame (51), the inner side of the filter frame (51) is provided with a material turning assembly, and the inner wall of the drying cavity (12) is provided with a driving assembly corresponding to the material turning assembly. The flow guide structure comprises a fixed plate (21) fixedly installed on the inner walls of the preheating cavity and the drying cavity, the inner walls of the preheating cavity and the drying cavity and located at the end positions of the fixed plate (21) are fixedly installed with a flow guide plate one (22), and the inner top surfaces of the preheating cavity and the drying cavity are fixedly installed with a flow guide plate two (23) corresponding to the exhaust cover (14). The adjusting assembly comprises six installation grooves (31) symmetrically formed on the inner walls of the material opening (13), the inner walls of each installation groove (31) are slidably installed with an adjusting plate (32), three adjusting plates (32) on the same side are connected through a connecting plate (35) at one end outside the installation groove (31), one end of the drying box (11) is rotatably installed with an adjusting screw rod (33) corresponding to the material opening (13), and the end portions of the two adjusting plates (32) are fixedly installed with connecting frames (34) screwed with the adjusting screw rod (33). The hot air drying assembly comprises a hot air drying nozzle (42) penetratingly arranged on the outer wall of the hot air pipe (41), the inner wall of the hot air drying nozzle (42) is fixedly installed with a plurality of air duct plates (43) which are linearly arranged, a plurality of air duct plates (43) are provided with an air outlet cavity (44) therebetween, the inner walls of a plurality of air outlet cavities (44) at both ends are slidably installed with baffles (45), one end of the baffle (45) penetrates through the side surface of the hot air drying nozzle (42) and is fixedly installed with a magnetic sheet one (46), two springs one (47) are fixedly installed between the side surface of the magnetic sheet one (46) and the side surface of the hot air drying nozzle (42), and the two springs one (47) are symmetric about the baffle (45), the top surface of the connecting plate (35) is fixedly installed with a supporting rod (48), and the top end of the supporting rod (48) is fixedly installed with a magnetic sheet two (49) corresponding to a plurality of magnetic sheet ones (46).

2. A continuous coating oven drying apparatus according to claim 1, wherein The cross-sectional shape of the flow guide plate one (22) is semicircular, and the cross-sectional shape of the flow guide plate two (23) is quarter circular.

3. A continuous coating oven drying apparatus according to claim 1, wherein The thread directions on the outer walls of the adjusting screw rod (33) are opposite.

4. A continuous coating oven drying apparatus according to claim 1, wherein The magnetic poles of the magnetic sheet one (46) and the magnetic sheet two (49) opposite to each other are the same.

5. A continuous coating oven drying apparatus as defined in claim 1, wherein The turnover assembly comprises two sliding plates (52) symmetrically slidingly installed on the inner wall of the filter frame (51), a plurality of uniformly distributed push rods (53) are fixedly installed between the opposite sides of the two sliding plates (52), two corresponding accommodation openings (54) are symmetrically formed in the bottom surface of the filter frame (51), the bottom surface of the sliding plate (52) is fixedly installed with a transmission plate (55), the bottom end of the transmission plate (55) penetrates through the accommodation opening (54), and the side surface of the transmission plate (55) is fixedly installed between the inner wall of the accommodation opening (54).

6. A continuous coating oven drying apparatus according to claim 5, wherein The driving assembly comprises two installation plates (61) symmetrically fixedly installed on the bottom surface of the filter frame (51), a shaft rod (62) is rotatably installed between the opposite sides of the two installation plates (61), the outer wall of the shaft rod (62) is fixedly sleeved with a driving paddle (63), both ends of the shaft rod (62) are fixedly installed with a driving plate (64) corresponding to the transmission plate (55), the side surface of the drying box (11) is fixedly installed with two indication boxes (71) corresponding to the shaft rod (62), and the inner side of the indication box (71) is provided with an indication structure.

7. A continuous coating oven drying apparatus according to claim 6, wherein The indication structure comprises a driving gear (72) rotatably installed on the inner wall of the indication box (71), one end of the shaft rod (62) penetrates through the side surface of the installation plate (61) and is fixedly installed with a transmission shaft (73), the end portion of the transmission shaft (73) is fixedly connected with the side surface of the driving gear (72), the inner wall of the indication box (71) is rotatably installed with a speed reduction gear (74) engaged with the driving gear (72), the side surface of the speed reduction gear (74) is fixedly installed with a reciprocating lead screw (75), the top surface of the indication box (71) is provided with a guide opening (76), the inner wall of the guide opening (76) is slidingly installed with an indication plate (77), and the bottom end of the indication plate (77) is screwed with the outer wall of the reciprocating lead screw (75) through a threaded ring.

8. A continuous coating oven drying apparatus according to claim 7, wherein The top surface of the indication box (71) is provided with a scale line corresponding to the indication plate (77).

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