Hot-air drier

Abstract

The application discloses a hot air dryer and relates to the technical field of drying, which comprises a hot air cover, a wind blocking mechanism and a heating mechanism, the wind blocking mechanism comprises a rotating shaft and a plurality of wind blocking plates which are connected to the rotating shaft in an even manner along the axial direction, both ends of the hot air cover are fixedly connected with mounting racks, the rotating shaft is rotatably connected to the front end of the mounting rack, the outer side plate of one of the mounting racks is fixedly connected with a first motor, the output shaft of the first motor and the end of the rotating shaft close to the motor are fixedly connected with pulleys, the two pulleys are connected through a belt drive, and the rotating shaft is uniformly provided with a plurality of torsional springs corresponding to the wind blocking plates. According to the application, the bottom surface of the hot air cover is provided with a plurality of wind blocking plate structures, when the device is used, the opening and closing of the wind blocking plate can be adjusted according to the width of the paper, the paper can be accurately dried, and the device is more convenient to use.

Description

Technical Field

[0001] This invention relates to the field of drying technology, and more specifically to a hot air dryer. Background Technology

[0002] Hot air drying is a common papermaking process. Wet paper sheets leaving the press section typically contain 60%–70% moisture. They need to pass through a drying section to remove the moisture to below 10% to become dry paper, while simultaneously giving the paper a certain strength. During hot air drying, heat, mass, and force transfer occur between the hot air and the wet paper. The hot air transfers heat through convection, causing moisture to evaporate from the paper and carrying away moisture from the paper surface, thus achieving paper drying. In the papermaking process, wet paper needs to be dried after forming to obtain the finished paper. Hot air drying, as an efficient and rapid drying method, is widely used.

[0003] The air delivery width of a hot air dryer is a fixed value during use, but the width of the paper on the production line will change according to different needs. If the width of the dryer is too wide after the size change, it will lead to heat waste and increase production costs. If it is too narrow, the hot air will not be able to completely cover the paper, affecting the drying effect.

[0004] Therefore, it is necessary to propose a hot air dryer to solve the above problems. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] The purpose of this invention is to address the problem that, during the use of a hot air dryer, the air delivery width is a fixed value, but the width of the paper on the production line changes according to different needs. If the width of the dryer is too wide, it will lead to heat waste and increase production costs; if it is too narrow, the hot air will not be able to completely cover the paper, affecting the drying effect. This invention provides a hot air dryer.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0009] A hot air dryer includes a hot air hood, a wind deflector mechanism, and a heating mechanism. The wind deflector mechanism includes a rotating shaft and multiple wind deflectors evenly rotatably connected along its axial direction. Mounting brackets are fixedly connected to both ends of the hot air hood. The rotating shaft is rotatably connected to the front end of the mounting brackets. A first motor is fixedly connected to the outer side plate of one of the mounting brackets. Pulleys are fixedly connected to the output shaft of the first motor and to the end of the rotating shaft near the motor. Two pulleys are connected by a belt drive. Multiple torsion springs corresponding to the wind deflectors are evenly arranged on the rotating shaft. Multiple stops are evenly fixedly connected to the outer circumference of the rotating shaft. The two ends of the torsion springs respectively abut against… On the stop block and the wind deflector, a slide rail is fixedly connected to the bottom rear end of the mounting bracket. A second motor is fixedly connected to one end of the slide rail. A threaded rod is rotatably connected inside the slide rail. The threaded rod is fixedly connected to the output shaft of the second motor. A slider that slides with the slide rail is symmetrically threaded on the threaded rod. A mounting plate is fixedly connected to one side of the bottom of the slider. A distance sensor is fixedly connected to the mounting plate. A cantilever is fixedly connected to the other side of the bottom of the slider. An extension plate is fixedly connected to the end of the cantilever away from the slider. A top rod is fixedly connected to the front end of the extension plate. A limit plate is fixedly connected to one side of the top surface of the wind deflector.

[0010] Preferably, the heating mechanism includes multiple fixed frames and heating wires fixedly connected thereto. Conductive rails are fixedly connected parallel to each other on both sides of the inner wall of the hot air hood. The fixed frames are uniformly fixed on the conductive rails. A receiving groove is formed at the center of the fixed frame. Movable grooves are formed on both sides of the inner wall of the receiving groove. A plug is slidably disposed in the movable groove. A clamping plate for plug insertion is fixedly connected to the end of the receiving groove. A guide rod is fixedly connected to one side plate of the plug. A compression spring is movably sleeved at one end of the guide rod. An anti-detachment plate is fixedly connected to the other end of the guide rod. Hydraulic cylinders are fixedly connected to both ends of the rear side of the hot air hood. A push rod is fixedly connected to the telescopic rod end of the hydraulic cylinder. A push plate movably sleeved on the bottom surface of the push rod along its length is fixedly connected to the push rod. Both ends of the heating wire are electrically connected to one of the conductive rails and the plug, respectively. The clamping plate is electrically connected to the other conductive rail. An anti-insertion plate is fixedly connected to the inner side plate of the baffle plate, located between the plug and the clamping plate.

[0011] Preferably, the limiting plate is fixedly connected to one side edge of the wind deflector near the center of the hot air hood, and one side of the limiting plate is located above the adjacent wind deflector.

[0012] Preferably, one end of the hot air hood is fixedly connected to an air duct communicating with its interior.

[0013] Preferably, the length of the cantilever is greater than the width of the wind deflector, but less than the sum of the widths of the two wind deflectors.

[0014] (III) Beneficial Effects

[0015] The beneficial effects of this invention are as follows:

[0016] 1. This invention, by setting multiple baffle structures on the bottom surface of the hot air hood, allows for precise drying of the paper by adjusting the opening and closing of the baffles according to the width of the paper during use, making it more convenient to use.

[0017] 2. In this invention, through the combination of plug and clamp, the heating range of the heating wire can be adjusted according to the width of the baffle plate during the use of the device, so that the drying device only heats the paper area, which can ensure the heating effect and reduce power consumption. Attached Figure Description

[0018] Figure 1 This is an isometric schematic diagram of the present invention;

[0019] Figure 2 This is an enlarged schematic diagram of the structure at point A in this invention;

[0020] Figure 3 This is a rear view diagram of the present invention;

[0021] Figure 4 This is a bottom view diagram of the present invention;

[0022] Figure 5 This is an enlarged schematic diagram of the structure at point B in this invention;

[0023] Figure 6 This is a schematic diagram of the top cross-section of the present invention;

[0024] Figure 7 This is an enlarged schematic diagram of the structure at point C in this invention;

[0025] Figure 8 This is a complete schematic diagram of the wind deflector of the present invention.

[0026] Reference numerals: 1. Hot air hood; 2. Hydraulic cylinder; 4. First motor; 5. Baffle plate; 6. Rotating shaft; 7. Air duct; 8. Mounting bracket; 9. Belt; 10. Pulley; 11. Stop block; 12. Torsion spring; 13. Second motor; 14. Slider; 15. Slide rail; 16. Threaded rod; 17. Top rod; 18. Extension plate; 19. Cantilever; 20. Mounting plate; 21. Distance sensor; 22. Push rod; 23. Heating wire; 24. Conductive rail; 25. Clamping plate; 26. Anti-insertion plate; 27. Plug; 28. Guide rod; 29. ​​Anti-detachment plate; 30. Compression spring; 31. Movable groove; 32. Fixed bracket; 33. Push plate; 34. Receiving groove; 35. Limiting plate. Detailed Implementation

[0027] 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.

[0028] Please see Figure 1-8 A hot air dryer includes a hot air hood 1, a baffle mechanism, and a heating mechanism. The baffle mechanism includes a rotating shaft 6 and multiple baffle plates 5 that are uniformly rotatable along its axial direction. Mounting brackets 8 are fixedly connected to both ends of the hot air hood 1. The rotating shaft 6 is rotatably connected to the front end of the mounting brackets 8. A first motor 4 is fixedly connected to the outer side plate of one of the mounting brackets 8. Pulleys 10 are fixedly connected to the output shaft of the first motor 4 and to the end of the rotating shaft 6 near the motor. The two pulleys 10 are connected by a belt 9. Multiple torsion springs 12 corresponding to the baffle plates 5 are uniformly arranged on the rotating shaft 6. Multiple stops 11 are uniformly fixedly connected to the outer circumference of the rotating shaft 6. The two ends of the torsion springs 12 abut against the stops 11 and the baffle plates, respectively. On the 5, a slide rail 15 is fixedly connected to the bottom rear end of the mounting bracket 8. A second motor 13 is fixedly connected to one end of the slide rail 15. A threaded rod 16 is rotatably connected inside the slide rail 15. The threaded rod 16 is fixedly connected to the output shaft of the second motor 13. A slider 14 that slides with the slide rail 15 is symmetrically threaded on the threaded rod 16. A mounting plate 20 is fixedly connected to one side of the bottom of the slider 14. A distance sensor 21 is fixedly connected to the mounting plate 20. A cantilever 19 is fixedly connected to the other side of the bottom of the slider 14. An extension plate 18 is fixedly connected to the end of the cantilever 19 away from the slider 14. A top rod 17 is fixedly connected to the front end of the extension plate 18. A limit plate 35 is fixedly connected to one side of the top surface of the wind deflector 5.

[0029] When using the device, after the width of the paper changes, the second motor 13 is activated. The second motor drives the threaded rod 16 to rotate, causing the two distance sensors 21 to move towards the center of the slide rail 15. After the distance sensors 21 sense the bottom of the paper, the distance between the two distance sensors 21 is the width of the paper, and the movement stops. Then the first motor 4 is activated, driving the rotating shaft 6 to rotate. The rotating shaft 6 drives the baffle plate 5 to rotate, opening the bottom of the hot air hood 1. When the baffle plate 5 rotates, the baffle plate 5 located at the top rod 17 is blocked, causing the torsion spring 12 to be compressed. The baffle plate 5 located at this location cannot open and remains closed. The other baffle plates 5 located near the sides of the hot air hood 1 are blocked by the adjacent baffle plates 5 under the action of the limiting plate and cannot open either. Therefore, the two outer positions of the open baffle plate 5 are located at the positions where the two edges of the paper coincide with the baffle plate 5.

[0030] The heating mechanism includes multiple fixed brackets 32 and heating wires 23 fixedly connected to them. Conductive rails 24 are fixedly connected parallel to each other on both sides of the inner wall of the hot air hood 1. The fixed brackets 32 are evenly fixed on the conductive rails 24. The two conductive rails 24 are electrically connected to the neutral and live wires of the mains power supply, respectively. A receiving groove 34 is provided at the center of the fixed bracket 32. Movable grooves 31 are provided on both sides of the inner wall of the receiving groove 34. A plug 27 is slidably disposed within the movable groove 31. A clamp 25 for inserting into the plug 27 is fixedly connected to the end of the receiving groove 34. A guide rod 28 is fixedly connected to one side plate of the plug 27. A compression spring 30 is movably sleeved at one end of the guide rod 28. The other end is fixedly connected to an anti-detachment plate 29. The width of the anti-detachment plate 29 is greater than the width of the push plate 33, so that when the oil cylinder 2 retracts, it can pull back the guide rod 28. Both ends of the rear side of the hot air cover 1 are fixedly connected to oil cylinders 2. The telescopic rod end of the oil cylinder 2 is fixedly connected to a push rod 22. The bottom surface of the push rod 22 is fixedly connected to a push plate 33 that is movably sleeved with the guide rod 28 along its length direction. The two ends of the heating wire 23 are electrically connected to one of the conductive rails 24 and the plug 27, respectively. The clamping plate 25 is electrically connected to the other conductive rail 24. An anti-insertion plate 26 is fixedly connected to the inner side plate of the wind deflector 5. The anti-insertion plate 26 is located between the plug 27 and the clamping plate 25.

[0031] When the hydraulic cylinder 2 is in the retracted state, the heating wire 23 is in an open circuit state. After the baffle 5 is opened, the hydraulic cylinder 2 is activated, pushing the plug 27 forward to connect the plug 27 to the clamp 25, thus forming a complete circuit between the two conductive rails 24 and the heating wire 23. At the closed baffle 5, due to the action of the anti-insertion plate 26, the compression spring 30 is compressed, preventing the plug 27 from being inserted into the clamp 25. This keeps the heating wire 23 at the closed baffle 5 in an open circuit state. Therefore, the heating wire 23 can operate according to the opening and closing of the baffle 5.

[0032] The limiting plate 35 is fixedly connected to one side edge of the wind deflector 5 near the center of the hot air cover 1, and one side of the limiting plate 35 is located above the adjacent wind deflector 5.

[0033] One end of the hot air hood 1 is fixedly connected to an air duct 7 that communicates with its interior. The air duct 7 is connected to a fan through the pipe to supply air to the device.

[0034] The length of the cantilever 19 is less than the width of the wind deflector 5. After detecting the width of the paper, the wind deflector 5 can be opened by overlapping the edge of the paper with the wind deflector 5 at any position, while the adjacent wind deflectors 5 will not be opened.

[0035] In summary, this invention, by setting multiple baffle structures on the bottom surface of the hot air hood, allows for precise drying of the paper by adjusting the opening and closing of the baffles according to the width of the paper during use, making it more convenient to use. Through the coordinated design of the plug and clamps, the heating range of the heating wire can be adjusted according to the width of the baffles during use, ensuring that the drying device heats only the paper area, thus guaranteeing heating effect while reducing power consumption.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hot air dryer, characterized in that: The device includes a hot air hood (1), a wind deflector mechanism, and a heating mechanism. The wind deflector mechanism includes a rotating shaft (6) and multiple wind deflectors (5) that are uniformly rotatably connected along its axial direction. Both ends of the hot air hood (1) are fixedly connected to mounting brackets (8). The rotating shaft (6) is rotatably connected to the front end of the mounting brackets (8). A first motor (4) is fixedly connected to the outer side plate of one of the mounting brackets (8). Pulleys (10) are fixedly connected to the output shaft of the first motor (4) and to the end of the rotating shaft (6) near the first motor (4). The two pulleys (10) are connected by a belt (9). Multiple torsion springs (12) corresponding to the wind deflectors (5) are uniformly arranged on the rotating shaft (6). The outer circumference of the rotating shaft (6) is uniformly connected to... The mounting bracket (8) is equipped with multiple stops (11). The two ends of the torsion spring (12) abut against the stops (11) and the wind deflector (5) respectively. A slide rail (15) is fixedly connected to the bottom of the rear end of the mounting bracket (8). A second motor (13) is fixedly connected to one end of the slide rail (15). A threaded rod (16) is rotatably connected inside the slide rail (15). The threaded rod (16) is fixedly connected to the output shaft of the second motor (13). A slider (14) that slides with the slide rail (15) is symmetrically threaded on the threaded rod (16). A mounting plate (20) is fixedly connected to one side of the bottom of the slider (14). A distance sensor (21) is fixedly connected to the mounting plate (20). A slider (14) is fixedly connected to the other side of the bottom of the slider (14). There is a cantilever (19), and an extension plate (18) is fixedly connected to the end of the cantilever (19) away from the slider (14). A top rod (17) is fixedly connected to the front end of the extension plate (18). A limit plate (35) is fixedly connected to one side of the top surface of the wind deflector (5). The limit plate (35) is fixedly connected to one side edge of the wind deflector (5) near the center of the hot air hood (1). One side of the limit plate (35) is located above the adjacent wind deflector (5). The length of the cantilever (19) is greater than the width of the wind deflector (5) and less than the sum of the widths of the two wind deflectors (5). When the width of the paper changes, the second motor (13) is run. The second motor drives the threaded rod (16) to rotate, so that the two distance sensors (21) move towards the slide rail ( The device moves at the center of the 15). After the distance sensor (21) senses the bottom of the paper, the distance between the two distance sensors (21) is the width of the paper, and the device stops moving. Then the first motor (4) is run. The first motor (4) drives the rotating shaft (6) to rotate. The rotating shaft (6) drives the baffle plate (5) to rotate and open the bottom of the hot air cover (1). When the baffle plate (5) rotates, the baffle plate (5) located at the top rod (17) is blocked, causing the torsion spring (12) to be compressed. The baffle plate (5) located here cannot be opened and is in a closed state. The other baffle plates (5) located near the hot air cover (1) on both sides of the open baffle plate (5) are blocked by the adjacent baffle plates (5) under the action of the limiting plate.

2. The hot air dryer according to claim 1, characterized in that: The heating mechanism includes multiple fixed frames (32) and heating wires (23) fixedly connected thereto. Conductive rails (24) are fixedly connected parallel to both sides of the inner wall of the hot air hood (1). The fixed frames (32) are evenly fixed on the conductive rails (24). A receiving groove (34) is provided at the center of the fixed frame (32). Movable grooves (31) are provided on both sides of the inner wall of the receiving groove (34). A plug (27) is slidably arranged in the movable groove (31). A clamp (25) for plugging into the plug (27) is fixedly connected to the end of the receiving groove (34). A guide rod (28) is fixedly connected to one side plate of the plug (27). A compression spring is movably sleeved at one end of the guide rod (28). (30) The other end of the guide rod (28) is fixedly connected to an anti-detachment plate (29). Both ends of the rear side of the hot air cover (1) are fixedly connected to oil cylinders (2). The telescopic rod end of the oil cylinder (2) is fixedly connected to a push rod (22). The bottom surface of the push rod (22) is fixedly connected to a push plate (33) that is movably sleeved with the guide rod (28) along its length direction. Both ends of the heating wire (23) are electrically connected to one of the conductive rails (24) and the plug (27) respectively. The clamp (25) is electrically connected to the other conductive rail (24). An anti-insertion plate (26) is fixedly connected to the inner side plate of the wind deflector (5). The anti-insertion plate (26) is located between the plug (27) and the clamp (25).

3. The hot air dryer according to claim 1, characterized in that: One end of the hot air hood (1) is fixedly connected to an air duct (7) that communicates with its interior.

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