A veneer dryer and veneer drying system

Abstract

This application relates to a veneer dryer and a veneer drying system. The veneer dryer includes a shell with an inlet and an outlet. Inside the shell, from the inlet to the outlet, are sequentially arranged a heating zone, a dehumidification zone, a drying zone, and an air-cooling zone. The shell also includes a partition between the heating zone and the drying zone. The dehumidification zone is located at one end of the partition, and the inlet and outlet are located at the other end. Heating devices are installed in the heating zone, dehumidification zone, and drying zone to introduce hot air into the corresponding areas. A cooling device is installed in the air-cooling zone to introduce cold air. The dehumidification zone has a first dehumidification outlet, and the drying zone has a second dehumidification outlet, which communicates with the heating zone. This veneer dryer can effectively improve the drying efficiency of veneers, ensure product quality, and reduce heat loss while improving economic efficiency.

Description

Technical Field

[0001] This application relates to the field of drying equipment technology, specifically to a veneer dryer and a veneer drying system. Background Technology

[0002] Veneer is made by cutting trees into strips of a specified thickness along the circular surface of the trunk. The veneer needs to be dried using a veneer dryer.

[0003] The veneer is conveyed to the veneer dryer by a conveying mechanism for drying. The veneer dryer dries the veneer by blowing hot air onto it. However, how to improve drying efficiency and ensure product quality are technical problems that need to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this application is to provide a veneer dryer and a veneer drying system that can effectively improve the drying efficiency of veneers and ensure product quality.

[0005] To address the aforementioned technical problems, this application provides a single-board dryer, comprising a shell with an inlet and an outlet. Within the shell, from the inlet to the outlet, are sequentially arranged a heating zone, a dehumidification zone, a drying zone, and an air-cooling zone. The shell also includes a partition between the heating zone and the drying zone. The dehumidification zone is located at one end of the partition, and the inlet and outlet are located at the other end. Heating devices are respectively provided in the heating zone, the dehumidification zone, and the drying zone, each for introducing hot air into its corresponding area. A cooling device is provided in the air-cooling zone for introducing cold air into it. The dehumidification zone also has a first dehumidification outlet, and the drying zone has a second dehumidification outlet, which communicates with the heating zone.

[0006] During the drying process, the veneer sequentially passes through a heating zone, a dehumidification zone, a drying zone, and a cooling zone to ensure the drying effect and efficiency, thereby improving product quality. The heating zone rapidly raises the temperature of the veneer, ensuring it reaches a high temperature upon arrival at the dehumidification zone. This allows internal moisture to evaporate and is expelled through the first dehumidification vent, facilitating rapid drying and ensuring efficient evaporation of moisture. During the drying zone, any remaining moisture evaporates and is discharged through the second dehumidification vent, maintaining the drying effect. The dried veneer, still at a high temperature, passes through the cooling zone where a cooling device blows cold air to lower its temperature before exiting the casing for the next process. This design prevents the hot veneer from absorbing moisture from the air upon exiting the casing, ensuring the quality of the drying process.

[0007] Because the heating zone and the drying zone are independent of each other, the temperature in the heating zone is relatively low and the humidity is relatively high, while the temperature in the drying zone is relatively high and the humidity is relatively low. The gases in the heating zone and the drying zone do not affect each other, ensuring the heating effect of the veneer in the heating zone and the drying effect in the drying zone.

[0008] The veneer is dried as it passes through the drying zone, causing a small amount of water inside to evaporate. The gas discharged from the second exhaust port has a higher temperature and relatively lower humidity. Connecting the second exhaust port to the heating zone allows the gas discharged from the second exhaust port to be passed into the heating zone, enabling the heat in this gas to be reused, reducing heat waste and improving economy.

[0009] Optionally, the second vent is located on the spacer component.

[0010] Optionally, the heating zone is provided with a third humidification outlet.

[0011] Optionally, the housing includes a frame and a thermal insulation layer, the thermal insulation layer being fixed outside the frame, and the spacer, the heating device, and the cooling device all being fixed to the frame.

[0012] Optionally, the housing is further provided with ventilation holes in the air-cooled area, and the cooling device is a cooling fan.

[0013] Optionally, the side walls and / or top walls of the housing may also be provided with access doors.

[0014] Optionally, the veneer dryer further includes a conveying mechanism, which includes a sprocket assembly, a conveying chain, a drive unit, and several veneer clamping parts. The conveying chain is sleeved around the sprocket assembly and forms a ring structure. Each veneer clamping part includes a fixed veneer clamp, a movable veneer clamp, and an elastic element clamped between the fixed veneer clamp and the movable veneer clamp. The fixed veneer clamp is connected to the conveying chain, and a clamping opening for clamping veneers is formed between two adjacent veneer clamping parts. The sprocket assembly includes several sprockets, and the drive unit is drivenly connected to the sprocket assembly and can drive the conveying chain to move through the sprocket assembly.

[0015] Optionally, the plurality of sprockets includes an infeed sprocket and at least two support sprockets. The at least two support sprockets include a guide sprocket and a rotary sprocket. The rotary sprocket and the infeed sprocket are respectively supported at both ends of the conveyor chain. The guide sprocket is disposed between the infeed sprocket and the rotary sprocket. The diameter of the infeed sprocket is smaller than the diameter of the support sprocket. The infeed sprocket is a drive sprocket, and at least one of the support sprockets is a drive sprocket. The drive unit includes a drive motor that is pulverizedly connected to the drive sprocket.

[0016] Optionally, the feed sprocket is coaxially connected to a first gear, the guide sprocket is coaxially connected to a second gear, and the drive unit includes a first drive motor and a gear set, wherein the first drive motor is connected to the first gear and the second gear respectively through the gear set.

[0017] This application also provides a veneer drying system, including a side-shifting conveyor belt, a veneer conveyor, a skew-roll straightening device, a veneer collector, and a veneer dryer as described above. The side-shifting conveyor belt is located at the inlet of the shell of the veneer dryer, the veneer conveyor and the veneer collector are sequentially located at the outlet of the shell of the veneer dryer, and the skew-roll straightening device is located on the veneer conveyor.

[0018] A veneer drying system with the veneer dryer described above has similar technical effects to the veneer dryer described above, and will not be described in detail here for the sake of brevity. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the veneer dryer provided in the embodiments of this application;

[0020] Figure 2 This is a schematic diagram of the external structure of a veneer dryer;

[0021] Figure 3 This is a partial structural diagram of a veneer dryer;

[0022] Figure 4 yes Figure 3 A structural diagram from another perspective;

[0023] Figure 5 This is a schematic diagram of the plate clamping part;

[0024] Figure 6 This is a schematic diagram of the structure of the rotary sprocket of a veneer dryer;

[0025] Figure 7 This is a schematic diagram of a single-board drying system.

[0026] Appendix Figures 1-7 The reference numerals in the attached figures are explained as follows:

[0027] 10. Veneer dryer; 20. Side-shifting conveyor belt; 30. Veneer conveyor; 40. Inclined roller straightening device; 50. Veneer collecting machine;

[0028] 1. Shell, 11. Inlet, 12. Outlet, 13. Heating zone, 131. Third exhaust port, 14. Exhaust zone, 141. First exhaust port, 15. Drying zone, 151. Second exhaust port, 16. Air-cooled zone, 17. Spacer components, 18. Frame, 19. Insulation layer, 110. Ventilation hole, 120. Inspection door.

[0029] 2. Heating device;

[0030] 3 Cooling device

[0031] 4 Conveying mechanism, 41 Infeed sprocket, 411 First gear, 42 Guide sprocket, 421 Second gear, 43 Rotary sprocket, 44 Conveying chain, 451 First drive motor, 452 Gear set, 453 Second drive motor, 46 Plate clamping part, 461 Fixed plate clamp, 462 Movable plate clamp, 463 Elastic element, 47 Plate clamping opening, 48 Infeed opening, 49 Outfeed opening. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solutions of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Veneer is a thin strip of wood cut into strips of a specified thickness along the circular surface of the trunk after being cut to a certain length. It needs to be dried using a veneer dryer 10. This application provides a veneer dryer 10 for drying veneer, ensuring both drying efficiency and quality.

[0034] like Figure 1 As shown, the veneer dryer 10 includes a housing 1, which has an inlet 11 and an outlet 12. Inside the housing 1, from the inlet 11 to the outlet 12, there are sequentially arranged a heating zone 13, a dehumidification zone 14, a drying zone 15, and an air-cooling zone 16. Heating devices 2 are respectively installed in the heating zone 13, the dehumidification zone 14, and the drying zone 15 to introduce hot air into the corresponding areas. A cooling device 3 is installed in the air-cooling zone 16 to introduce cold air into the air-cooling zone 16. The housing 1 also has a spacer component 17 (such as a partition plate) spaced between the heating zone 13 and the drying zone 15 to separate the heating zone 13 and the spacer area into two independent regions.

[0035] The veneer is conveyed by the conveying mechanism 4 and enters the housing 1 through the inlet 11. It then passes through the heating zone 13, the dehumidification zone 14, the drying zone 15 and the air-cooling zone 16 in sequence. The dried veneer is then discharged from the outlet 12, thus completing the veneer drying operation.

[0036] The dehumidification zone 14 is also provided with a first dehumidification port 141, and a first dehumidification fan can be installed at the first dehumidification port 141. The first dehumidification fan is used to discharge the high humidity gas in the dehumidification zone 14 through the first dehumidification port 141. The drying zone 15 is also provided with a second dehumidification port 151, and a second dehumidification fan can be installed at the second dehumidification port 151. The second dehumidification fan is used to discharge the high humidity gas in the drying zone 15 through the second dehumidification port 151, so as to improve the drying efficiency of the single board.

[0037] After the veneer reaches the heating zone 13, it is rapidly heated by hot air supplied through the corresponding heating device 2. Then, upon reaching the dehumidification zone 14, it is further heated by hot air supplied through the corresponding heating device 2, causing the moisture inside the veneer to evaporate quickly. The high humidity gas in the dehumidification zone 14 is then discharged by the first dehumidification fan to remove the moisture from the veneer. After most of the moisture in the veneer has evaporated, it enters the drying zone 15, where it is dried by hot air supplied through the heating device 2. The remaining moisture in the veneer is then dried, and the high humidity gas is discharged through the second dehumidification port 151, thus achieving drying. Finally, the veneer enters the air-cooling zone 16, where it is cooled by cold air supplied through the cooling device 3. The dried veneer is then discharged from the housing 1 through the outlet 12 and enters the next process.

[0038] The heating zone 13 rapidly heats the veneer, ensuring a high temperature upon arrival at the dehumidification zone 14. This allows moisture inside the veneer to evaporate, facilitating dehumidification. In the dehumidification zone 14, the moisture evaporates quickly, resulting in high drying efficiency. Because the heating zone 13 and the drying zone are independent, the temperature and humidity in the heating zone 13 are relatively low, while the temperature and humidity in the drying zone 15 are relatively high. The gases in the heating zone 13 and the drying zone 15 do not interfere with each other, ensuring optimal heating and drying effects for the veneer in both zones.

[0039] The first exhaust fan can operate continuously, or a humidity sensor can be installed in the exhaust zone 14. When the humidity sensor detects that the humidity in the exhaust zone 14 is high, the first exhaust fan will operate to expel the high humidity gas in the exhaust zone 14. Alternatively, during the drying process of the single board, the first exhaust fan can be started at timed intervals to expel the high humidity gas in the exhaust zone 14. Similarly, the second exhaust fan can operate continuously, or it can be turned on when the humidity in the drying zone 15 is high, or it can be turned on at timed intervals.

[0040] After the veneer passes through drying zone 15, all internal moisture is removed, but the temperature remains high. When it passes through cooling zone 16, cooling device 3 blows cold air onto the veneer to lower its temperature. The veneer then exits the housing 1 through outlet 12 to proceed to the next process. This arrangement prevents the hot veneer from absorbing moisture from the air after leaving the housing 1, ensuring the drying quality of the veneer. During the drying process, the veneer sequentially passes through heating zone 13 (heating), dehumidification zone 14 (dehumidification), drying zone 15 (drying), and cooling zone 16 (cooling), ensuring the drying effect and efficiency of the veneer and improving product quality.

[0041] The veneer is dried when it passes through the drying zone 15, causing a small amount of water inside to evaporate. The gas discharged from the second exhaust port 151 has a higher temperature and relatively lower humidity. The second exhaust port 151 is connected to the heating zone 13, so that the gas discharged from the second exhaust port 151 is introduced into the heating zone 13. The heat in this part of the gas can be reused, reducing heat waste and improving economy.

[0042] The second humidification outlet 151 is located in the partition member 17. Of course, the second humidification outlet 151 can also be located on the side wall of the drying zone 15 and connected to the heating zone 13 through an external pipeline. When the second humidification outlet 151 is located in the partition member 17, the overall structure can be simplified, and heat loss due to heat exchange with the external environment caused by the external pipeline can be avoided.

[0043] like Figure 1 As shown, the heating zone 13 is also equipped with a third dehumidification port 131, at which a third dehumidification fan is installed. Alternatively, the heating zone 13 may not have a third dehumidification port 131. For example, when the high-temperature humid air in the dehumidification zone 14 is discharged from the first dehumidification port 141, the internal pressure decreases, and the gas in the heating zone 13 flows towards the dehumidification zone 14, thereby discharging the humid air in the heating zone 13 into the dehumidification zone 14. However, when the heating zone 13 is equipped with a third dehumidification port 131, the humid air in the heating zone 13 can be discharged in a timely manner, resulting in a better drying effect.

[0044] In this embodiment, there are no restrictions on the number or position of the first exhaust port 141, the second exhaust port 151, and the third exhaust port 131. For example, multiple first exhaust ports 141 can be provided at intervals on the top of the exhaust zone 14, and first exhaust ports 141 can also be provided on the side wall of the exhaust zone 14. The drying zone 15 can be provided with multiple second exhaust ports 151 at intervals along its length, or the second exhaust ports 151 can be provided on the side of the drying zone 15 facing the exhaust zone 14 (where the humidity is relatively high). The heating zone 13 can be provided with multiple third exhaust ports 131 at intervals along its length, or the third exhaust port 131 can be provided on the side of the heating zone 13 facing the exhaust zone 14 (where the humidity is relatively high).

[0045] like Figure 1 and Figure 2 As shown, the shell 1 includes a frame 18 and a thermal insulation layer 19. The thermal insulation layer 19 is fixed outside the frame 18 to reduce heat loss, and the frame 18 provides structural support to ensure the structural stability of the shell 1. The spacer component 17, heating device 2, cooling device 3, and various fans are all fixed to the frame 18, ensuring good stability.

[0046] like Figure 2As shown, the housing 1 also has ventilation holes 110 in the air-cooled zone 16. The cooling device 3 is a cooling fan. After the cooling fan is started, it can use the ambient air as cold air and introduce it into the air-cooled zone 16 to cool the dried veneer. The ventilation holes 110 facilitate the entry of cold air into the fan area, thereby facilitating rapid cooling of the veneer. This simplifies the overall structure and reduces costs, eliminating the need for a separate air source. To ensure the dryness of the veneer, the air introduced into the air-cooled zone 16 (including ambient air and air from other air sources) can also be dehumidified and dried air.

[0047] After the cold air blows onto the veneer to cool it, this part of the cold air will heat up and reach a certain temperature to form low-temperature air. This low-temperature air can then be discharged from the air-cooling zone 16, or it can be introduced into the drying zone 15 and the heating zone 13 as supplementary air, etc. The specific settings can be adjusted according to the actual situation.

[0048] like Figure 2 As shown, the side wall or top wall of the housing 1 is also provided with an inspection door 120 to facilitate maintenance of internal components when the veneer dryer 10 malfunctions. The number and location of the inspection doors 120 can be set according to the situation.

[0049] like Figure 1 As shown, the veneer dryer 10 also includes a conveying mechanism 4, which is used to convey veneers so that after the veneers enter the housing 1 through the inlet 11, they pass through the heating zone 13, the dehumidification zone 14, the drying zone 15 and the cooling zone in sequence, and are finally sent out of the veneer dryer 10 through the outlet 12.

[0050] like Figure 3 , Figure 4 and Figure 5 As shown, the conveying mechanism 4 includes a sprocket assembly, a conveying chain 44, a drive unit, and several plate clamping parts 46. The conveying chain 44 is sleeved on the outside of the sprocket assembly and forms a ring structure. The plate clamping part 46 includes a fixed plate clamp 461, a movable plate clamp 462, and an elastic member 463 clamped between the fixed plate clamp 461 and the movable plate clamp 462. The fixed plate clamp 461 is connected to the conveying chain 44. A plate clamping opening 47 for clamping a single plate is formed between two adjacent plate clamping parts 46, and the single plate is clamped in the plate clamping opening 47. The sprocket assembly includes several sprockets. The drive unit is drivenly connected to the sprocket assembly and can drive the conveying chain 44 to move through the sprocket assembly.

[0051] A single board is clamped at a clamping opening 47 between clamping parts 46. The clamping part 46 may include a fixed clamping clamp 461, a movable clamping clamp 462, and an elastic member 463 clamped between the fixed clamping clamp 461 and the movable clamping clamp 462. The fixed end of the fixed clamping clamp 461 is fixed to the conveyor chain 44. The movable clamping clamp 462 and the fixed clamping clamp 461 are arranged at an angle and clamped with the elastic member 463. Through the elastic support of the elastic member 463, the fixed clamping clamp 461 and the movable clamping clamp 462 form a certain angle, and the clamping opening 47 between two adjacent clamping parts 46 can clamp the single board. The single board is approximately perpendicular to the conveyor chain 44. The driving unit drives the sprocket set, and through the sprocket set, drives the conveyor chain 44 and each clamping part 46 to move, thereby driving each single board to move to pass through each area in sequence.

[0052] Of course, in this embodiment, the structure of the conveying mechanism 4 is not limited. For example, other fasteners, such as a conveyor belt, can be used to convey the veneer, or other fasteners can be used to fix the baffle to the conveyor chain 44. Using the clamping opening 47 formed between the veneer clamps 46 to clamp the veneer and realize the conveying of the veneer can simplify the overall structure, allowing the conveyor chain 44 to convey a larger number of veneers at the same time, improving the conveying efficiency and increasing the processing capacity of the veneer dryer 10, thereby increasing the output.

[0053] like Figure 3 , Figure 4 and Figure 6 As shown, the sprocket assembly includes a feed sprocket 41 and at least two support sprockets. The at least two support sprockets include a guide sprocket 42 and a slewing sprocket 43. The slewing sprocket 43 and the feed sprocket 41 are respectively supported at both ends of the conveyor chain 44. The guide sprocket 42 is located between the feed sprocket 41 and the slewing sprocket 43, providing support and guidance for the conveyor chain 44, resulting in a parallel arrangement of the upper and lower chains of the conveyor chain 44 between the guide sprocket 42 and the slewing sprocket 43. The diameter of the feed sprocket 41 is smaller than the diameter of the support sprockets. The feed sprocket 41 is the driving sprocket, and at least one support sprocket is also a driving sprocket. The drive unit includes a drive motor that is connected to the driving sprocket.

[0054] Each sprocket includes an axle and sprockets located at both ends of the axle. There are two (or more) conveyor chains 44. The two conveyor chains 44 are respectively set to correspond to the two sprockets of the sprocket group. The chain meshes with the sprockets of each sprocket group. The rotation of the sprocket shaft drives the sprocket to rotate, and then drives the plate clamp 46 to move through the conveyor chain 44.

[0055] The top, bottom, and side away from the feed sprocket 41 of the rotary sprocket 43 are engaged with the conveyor chain 44. The tail ends of the upper chain and the lower chain are engaged with the rotary sprocket 43 respectively. The front end of the upper chain (i.e. the end facing the feed sprocket 41) is engaged with the guide sprocket 42. The part of the upper chain between the feed sprocket 41 and the guide sprocket 42 is inclined, and the end facing the guide sprocket 42 is higher than the end facing the feed sprocket 41.

[0056] The conveying mechanism 4 has an inlet 48 and an outlet 49. Because the radius of the inlet sprocket 41 is small, the distance between adjacent clamping sections 46 increases when the clamping section 46 passes the inlet sprocket 41, causing the clamping opening 47 to open. Single boards can be fed and discharged from this point. The inlet 48 is located between the two sets of clamping sections 46 above the inlet sprocket 41, and the outlet 49 is located between the two sets of clamping sections 46 below the inlet sprocket 41. In other words, the clamping opening 47 opens and closes naturally at each sprocket due to the natural curvature of the chain, facilitating the feeding and discharging of single boards. In this embodiment, the inlet 48 can form the inlet 11 of the housing 1, and the outlet 12 can form the outlet 12 of the housing 1.

[0057] The veneer enters the corresponding clamping opening 47 through the inlet 48, and then, along the conveyor chain 44, passes the support sprockets into the veneer dryer 10. After passing through the heating zone 13, it reaches the dehumidification zone 14, then moves downwards around the rotating sprocket 43. After passing through the drying zone 15 and the air-cooling zone 16, it returns to the outlet 49 and is discharged from the outlet 49 to complete the drying operation. During the movement of the veneer to positions other than the inlet 48 and outlet 49, the clamping part 46 can clamp the veneer to ensure the stability of the veneer's movement.

[0058] The feed sprocket 41 is the driving wheel, which can ensure the stability and feed / output accuracy of the feed port 48 and the output port 49, and avoid collisions between the single board and the board clamp 46. This embodiment does not limit the number and position of other driving wheels besides the feed sprocket 41; they can be set according to actual conditions.

[0059] At least one support sprocket is also a drive sprocket. That is to say, the sprocket set includes at least two drive sprockets. Each drive sprocket rotates synchronously. Synchronous rotation means that the circumferential linear velocity of each drive sprocket is the same, so as to ensure the synchronous driving of each drive sprocket to the conveyor chain 44.

[0060] By driving the conveyor chain 44 simultaneously with at least two drive wheels, compared to the solution of driving the conveyor chain 44 solely with the infeed sprocket 41, the conveying stability of the conveyor chain 44 can be improved, and the probability of slippage between the conveyor chain 44 and the drive sprocket due to the large size of the veneer dryer 10 and the long length of the conveyor chain 44 can be reduced, thereby ensuring the conveying stability of the conveyor chain 44.

[0061] The drive motor can be a servo motor, which drives the drive sprocket to rotate, thus moving the conveyor chain 44. Each rotation of the drive sprocket corresponds to one movement of each plate clamp 46. The overall motion rhythm can be coordinated by the electrical control system to ensure that the movement of the conveyor chain 44 is consistent with the movement of the plates. The opening and closing, angle, etc. of the plate clamping openings 47 are jointly achieved by the movement position of the conveyor chain 44 and the electrical control system.

[0062] At least one of the guide sprocket 42 and the rotary sprocket 43 is the driving wheel. The guide sprocket 42 can be the driving wheel, the rotary sprocket 43 can be the driving wheel, or both the guide sprocket 42 and the rotary sprocket 43 can be driving wheels, so as to further improve the conveying stability and prevent the conveyor chain 44 from slipping.

[0063] like Figure 3 As shown, the feed sprocket 41 is coaxially connected to the first gear 411, and the drive unit includes a first drive motor 451. The first drive motor 451 can drive the first gear 411 to rotate, thereby driving the feed sprocket 41 to rotate.

[0064] like Figure 4 As shown, when the guide sprocket 42 is the driving sprocket, the guide sprocket 42 is coaxially connected to the second gear 421. The drive unit also includes a gear set 452. The first drive motor 451 is connected to the first gear 411 and the second gear 421 respectively through the gear set 452. The first drive motor 451 can drive the first gear 411 and the second gear 421 to rotate at the same time, thereby realizing the synchronous drive of the feed plate sprocket 41 and the guide sprocket 42.

[0065] Of course, the drive unit can also drive the second gear 421 to rotate through a separately set drive motor, while the first gear 411 and the second gear 421 can be driven to rotate by the first drive motor 451, which can simplify the overall structure and reduce costs.

[0066] The gear set 452 may include a driving gear and a driven gear that mesh with each other. The driving gear is connected to the main shaft of the first drive motor 451, and the driven gear meshes with the first gear 411 and the second gear 421 respectively. The first drive motor 451 drives the driving gear to rotate and drives the first gear 411 and the second gear 421 to rotate through the driven gear, so as to realize the rotation of the feed plate sprocket 41 and the guide sprocket 42.

[0067] like Figure 6As shown, when the rotary sprocket 43 is the driving sprocket, it is also coaxially connected to a third gear. The drive unit may also include a second drive motor 453, which can drive the third gear to rotate, thereby driving the rotary sprocket 43 to rotate. Since the gap between the rotary sprocket 43 and the feed gear is relatively large, in order to ensure that each drive motor can play its driving role, the second drive motor 453 can drive before the first drive motor 451.

[0068] This application also provides a single-board drying system, such as... Figure 7 As shown, the veneer drying system includes a side-shifting conveyor belt 20, a veneer conveyor 30 (such as a conveyor belt), a slant roller straightening device 40, a veneer collector 50, and a veneer dryer 10 as described above. The side-shifting conveyor belt 20 is located at the inlet 11 of the veneer dryer 10 and is used to transport veneers to the inlet 11, so that the veneers enter the veneer clamping opening 47 from the inlet 48. The veneer conveyor 30 and the veneer collector 50 are sequentially located at the outlet 12 of the shell 1 of the veneer dryer 10 and are used to receive the veneers after they have been dried by the veneer dryer 10. The slant roller straightening device 40 is located on the veneer conveyor 30 and is used to correct the deformation of the dried veneers.

[0069] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0070] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0071] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A veneer dryer, characterized in that, The device includes a housing (1), which has an inlet (11) and an outlet (12). Inside the housing (1), from the inlet (11) to the outlet (12), there are sequentially arranged a heating zone (13), a dehumidification zone (14), a drying zone (15) and an air-cooling zone (16). The housing (1) also has a spacer (17) located between the heating zone (13) and the drying zone (15). The dehumidification zone (14) is located at one end of the spacer (17), and the inlet (11) and the outlet (12) are located at the other end of the spacer (17). Heating devices (2) are provided in the heating zone (13), the dehumidification zone (14) and the drying zone (15), respectively. The heating devices (2) are used to introduce hot air into the corresponding areas. The air-cooled zone (16) is provided with a cooling device (3), which is used to introduce cold air into the air-cooled zone (16). The dehumidification zone (14) is also provided with a first dehumidification port (141), and the drying zone (15) is provided with a second dehumidification port (151), which is connected to the heating zone (13).

2. The veneer dryer according to claim 1, characterized in that, The second vent (151) is located on the spacer (17).

3. The veneer dryer according to claim 1, characterized in that, The heating zone (13) is equipped with a third humidification outlet (131).

4. The veneer dryer according to any one of claims 1-3, characterized in that, The housing (1) includes a frame (18) and a thermal insulation layer (19), the thermal insulation layer (19) being fixed outside the frame (18), and the spacer (17), the heating device (2) and the cooling device (3) being fixed to the frame (18).

5. The veneer dryer according to any one of claims 1-3, characterized in that, The housing (1) is also provided with ventilation holes (110) in the air-cooled zone (16), and the cooling device (3) is a cooling fan.

6. The veneer dryer according to any one of claims 1-3, characterized in that, The side walls and / or top walls of the housing (1) are also provided with inspection doors (120).

7. The veneer dryer according to any one of claims 1-3, characterized in that, The veneer dryer also includes a conveying mechanism (4), which includes a sprocket assembly, a conveying chain (44), a drive unit and several veneer clamps (46). The conveying chain (44) is sleeved on the sprocket assembly and forms a ring structure. The plate clamping part (46) includes a fixed plate clamp (461), a movable plate clamp (462), and an elastic member (463) clamped between the fixed plate clamp (461) and the movable plate clamp (462). The fixed plate clamp (461) is connected to the conveyor chain (44), and a plate clamping opening (47) for clamping a single plate is formed between two adjacent plate clamping parts (46). The sprocket assembly includes several sprockets, and the drive unit is driven to connect with the sprocket assembly and can drive the conveyor chain (44) to move through the sprocket assembly.

8. The veneer dryer according to claim 7, characterized in that, The plurality of sprockets include an infeed sprocket (41) and at least two support sprockets. The at least two support sprockets include a guide sprocket (42) and a rotary sprocket (43). The rotary sprocket (43) and the infeed sprocket (41) are respectively supported at both ends of the conveyor chain (44). The guide sprocket (42) is located between the infeed sprocket (41) and the rotary sprocket (43). The diameter of the infeed sprocket (41) is smaller than the diameter of the support sprocket. The feed sprocket (41) is a drive sprocket, and at least one of the support sprockets is a drive sprocket. The drive unit includes a drive motor that is connected to the drive sprocket.

9. The veneer dryer according to claim 8, characterized in that, The feed sprocket (41) and (2) are coaxially connected to a first gear (411), and the guide sprocket (42) is coaxially connected to a second gear (421). The drive unit includes a first drive motor (451) and a gear set (452). The first drive motor (451) is connected to the first gear (411) and the second gear (421) through the gear set (452).

10. A veneer drying system, characterized in that, The device includes a side-shifting conveyor belt (20), a veneer conveyor (30), a skew-roll straightening device (40), a veneer collector (50), and a veneer dryer as described in any one of claims 1-9. The side-shifting conveyor belt (20) is located at the inlet (11) of the shell (1) of the veneer dryer. The veneer conveyor (30) and the veneer collector (50) are located sequentially at the outlet (12) of the shell (1) of the veneer dryer. The skew-roll straightening device (40) is located on the veneer conveyor (30).

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