A circulating single board dryer

Abstract

The present application relates to drying equipment technical field, disclose a kind of circulating veneer dryer, comprising: drying room;It is located in the circulating conveyor frame in drying room, the circulating conveyor frame is provided with circulating conveying mechanism, the circulating conveying mechanism is provided with several clamping plate racks along circulation path, and several compacting mechanisms are arranged along circulation path at equal intervals, and the compacting mechanism is used to extrude clamping plate rack, for compacting veneer placed on clamping plate rack.By the design of circulating conveying mechanism, continuous circulation drying of veneer in drying room is realized, and the drying efficiency is significantly improved.Circulating conveying mechanism is provided with clamping plate rack and compacting mechanism, effectively prevent veneer from sliding or falling due to vibration, air flow and other factors during conveying, ensure the safe transportation and drying quality of veneer.

Description

Technical Field

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

[0002] Veneer (usually referring to thin wood veneers obtained by rotary cutting or slicing) is a key raw material in the production of engineered wood products such as plywood and blockboard. Drying is one of the most crucial steps in veneer production, aiming to reduce the moisture content of the veneer to the required range (typically 8%-12%) to meet the requirements of subsequent gluing, assembly, and hot-pressing processes, thus ensuring the quality and stability of the final product.

[0003] Currently, the main methods for drying veneers are as follows:

[0004] Intermittent drying kiln: Veneers are stacked on frame trolleys and pushed into the drying kiln for batch drying. This method has relatively low equipment investment, but it has significant disadvantages such as long drying cycle, low efficiency, high energy consumption, and large footprint. Uneven heating and airflow within the kiln can easily lead to localized over-drying or under-drying, affecting veneer quality. In addition, the loading and unloading process is cumbersome, making continuous production difficult.

[0005] Continuous tunnel dryers: Single-layer dryers move continuously within a narrow tunnel via conveying devices (such as mesh belts, rollers, and chains), exchanging heat with a heat medium (hot air, steam, etc.). Compared to intermittent kilns, they offer improved production efficiency and enable continuous operation. However, existing continuous dryers, especially those using single-layer conveying structures (such as mesh belts or single chains), generally suffer from excessive length. To achieve sufficient drying time, the tunnel needs to be very long, resulting in a huge plant footprint, high civil engineering costs, and room for improvement in thermal energy utilization (difficulty in recovering heat from exhaust gases).

[0006] Multi-layer continuous dryers: To extend the drying path within a limited space, some equipment employs a multi-layer structure (such as mesh belt multi-layer dryers). While this shortens the overall length of the equipment, in practical applications, especially when processing thin and brittle veneers, there is a risk that the veneers may curl, deform, or even break during inter-layer transfer. More importantly, when veneers need to be circulated back within the equipment (e.g., transferred from the upper end to the lower beginning for reverse conveying), existing conveying structures lack effective clamping devices, making it unreliable to prevent veneers from slipping or falling in the recirculation section (especially inclined or vertical sections) due to gravity, vibration, or airflow. This not only wastes veneers and affects production efficiency, but falling veneers can also clog equipment, cause malfunctions, or even safety accidents.

[0007] Therefore, the industry urgently needs a new veneer drying technology that can significantly improve drying efficiency, reduce energy consumption, reduce floor space, and safely and reliably achieve the circulation and transportation of veneers inside the equipment, especially effectively preventing veneers from falling off during the reflux process, while ensuring drying quality. Summary of the Invention

[0008] The purpose of this invention is to provide a circulating veneer dryer to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A circulating veneer dryer technical solution includes: a drying chamber;

[0011] A circulating conveyor frame is installed in the drying room. A circulating conveyor mechanism is installed on the circulating conveyor mechanism. Several clamping frames are installed along the circulating path on the circulating conveyor mechanism, and several pressing mechanisms are installed at equal intervals along the circulating path. The pressing mechanisms are used to squeeze the clamping frames and press the single boards placed on the clamping frames. Supporting mechanisms are installed on both sides of the pressing mechanisms to provide support along the circulating path. An end anti-drop guide mechanism is installed at one end of the circulating conveyor frame.

[0012] The circulating conveying mechanism includes a drive motor, the output end of which is connected to a drive main shaft. The drive main shaft is mounted on the circulating conveyor frame via a bearing housing. A main sprocket one and a main sprocket two are sleeved on the drive main shaft. A transmission secondary shaft is provided on the other side of the circulating conveyor frame. A secondary sprocket one and a secondary sprocket two are sleeved on the transmission secondary shaft. A chain one is arranged around the main sprocket one and the secondary sprocket one. A chain two is arranged around the main sprocket two and the secondary sprocket two.

[0013] The clamping mechanism includes a support frame, a pressure frame hinged to the support frame via a hinge shaft, and a spring connecting the support frame and the pressure frame.

[0014] The support mechanism includes a circulating ring fixed on the circulating conveyor frame. A connecting rod is connected to the side of the support frame, and a roller is provided at the end of the connecting rod. The roller rolls along the outer wall of the circulating ring.

[0015] The end anti-drop guide mechanism includes a frame fixing pipe fixed to the end of the circulating conveyor frame, an assembly frame installed on the frame fixing pipe, a locking bolt passing through the assembly frame and the frame fixing pipe, and an arc bracket connected to the assembly frame by a buffer spring, wherein the lower part of the arc bracket is hinged to the assembly frame.

[0016] The right-angled pieces are used to connect the support frame and the clamping plate frame to chain one and chain two, respectively.

[0017] As a preferred technical solution, the drying chamber is equipped with a heating device that is evenly distributed around the perimeter and top of the drying chamber to ensure that the veneer is heated evenly during the drying process.

[0018] As a preferred technical solution, the pressure frame is rotatably connected to the support frame via a hinge shaft, and the two ends of the spring are respectively fixed to the support frame and the pressure frame, so that the pressure frame has the tendency to press the clamping plate frame.

[0019] As a preferred technical solution, the circulation ring is a closed annular track, with rollers rolling close to the outer wall of the circulation ring to support the cyclic movement of the pressing mechanism.

[0020] As a preferred technical solution, the arc bracket of the end anti-drop guide mechanism is located at the bend of the circulating conveying path, with its arc concave surface facing the conveying direction of the single board, and the buffer spring provides buffer pressure to prevent the single board from slipping.

[0021] As a preferred technical solution, the drive main shaft and the transmission secondary shaft are arranged in parallel and are located at both ends of the circulating conveyor frame, forming a closed-loop conveying path.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] This invention relates to a circulating veneer dryer. Through the design of a circulating conveyor mechanism, continuous circulating drying of veneers within the drying chamber is achieved, significantly improving drying efficiency. The clamping frame and pressing mechanism on the circulating conveyor mechanism effectively prevent veneers from slipping or falling during transport due to vibration, airflow, or other factors, ensuring safe transport and high-quality drying. Simultaneously, the support mechanisms on both sides of the pressing mechanism provide stable support, further enhancing the stability and reliability of the equipment. Furthermore, the design of the end anti-drop guide mechanism effectively prevents veneers from slipping at bends in the circulating conveyor path, further improving the safety performance of the equipment. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a circulating veneer dryer;

[0025] Figure 2 for Figure 1 Enlarged schematic diagram of point A in a circulating veneer dryer;

[0026] Figure 3 This is an internal schematic diagram of a circulating veneer dryer;

[0027] Figure 4 This is a schematic diagram of the clamping frame and support frame connection parts of a circulating veneer dryer;

[0028] Figure 5This is a schematic diagram of the circulating conveying mechanism of a circulating veneer dryer.

[0029] In the attached diagram, the following are the reference numerals: 1. Drying chamber; 11. Circulating conveyor frame; 2. Circulating conveyor mechanism; 21. Drive motor; 22. Drive main shaft; 23. Main sprocket one; 24. Main sprocket two; 25. Transmission secondary shaft; 26. Secondary sprocket one; 27. Secondary sprocket two; 28. Chain one; 29. ​​Chain two; 3. Clamping plate frame; 4. Pressing mechanism; 41. Support frame; 42. Pressing frame; 43. Hinge shaft; 44. Spring; 5. Support mechanism; 51. Circulating ring; 52. Connecting rod; 53. Roller; 6. End anti-drop guide mechanism; 61. Frame fixing tube; 62. Assembly frame; 63. Locking bolt; 64. Arc bracket; 65. Buffer spring; 7. Right angle piece. Detailed Implementation

[0030] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. For those skilled in the art, the present invention can be practiced without some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present invention by illustrating examples of the invention.

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the present invention provides a circulating veneer dryer technical solution, including: a drying room 1;

[0032] A circulating conveyor frame 11 is installed in the drying room 1. A circulating conveyor mechanism 2 is installed on the circulating conveyor frame 11. Several clamping frames 3 are installed on the circulating conveyor mechanism 2 along the circulating path, and several pressing mechanisms 4 are installed at equal intervals along the circulating path. The pressing mechanisms 4 are used to squeeze the clamping frames 3 and to press the single boards placed on the clamping frames 3. Supporting mechanisms 5 are installed on both sides of the pressing mechanism 4. The supporting mechanisms 5 are used to provide support along the circulating path. One end of the circulating conveyor frame 11 is provided with an end anti-drop guide mechanism 6.

[0033] The circulating conveying mechanism 2 includes a drive motor 21, the output end of which is connected to a drive main shaft 22. The drive main shaft 22 is mounted on the circulating conveyor frame 11 via a bearing seat. A main sprocket 1 23 and a main sprocket 24 are sleeved on the drive main shaft 22. A transmission secondary shaft 25 is provided on the other side of the circulating conveyor frame 11. A secondary sprocket 1 26 and a secondary sprocket 27 are sleeved on the transmission secondary shaft 25. A chain 1 28 is arranged around the main sprocket 1 23 and the secondary sprocket 1 26, and a chain 29 is arranged around the main sprocket 24 and the secondary sprocket 27.

[0034] The clamping mechanism 4 includes a support frame 41, a pressure frame 42 hinged to the support frame 41 via a hinge shaft 43, and a spring 44 connecting the support frame 41 and the pressure frame 42;

[0035] The support mechanism 5 includes a circulation ring 51 fixed on the circulation conveyor frame 11, a connecting rod 52 connected to the side of the support frame 41, and a roller 53 provided at the end of the connecting rod 52, the roller 53 rolling along the outer wall of the circulation ring 51.

[0036] The end anti-drop guide mechanism 6 includes a frame fixing tube 61 fixed to the end of the circulating conveyor frame 11, an assembly frame 62 installed on the frame fixing tube 61, a locking bolt 63 passing through the assembly frame 62 and the frame fixing tube 61, and an arc bracket 64 connected to the assembly frame 62 by a buffer spring 65, with the lower part of the arc bracket 64 hinged to the assembly frame 62.

[0037] Right-angle piece 7, support frame 41 and clamping plate frame 3 are all connected to chain 1 28 and chain 2 29 respectively through right-angle piece 7.

[0038] The drying chamber 1 is equipped with a heating device that is evenly distributed around the perimeter and top of the drying chamber 1 to ensure that the veneer is heated evenly during the drying process.

[0039] The pressure frame 42 is rotatably connected to the support frame 41 via the hinge shaft 43. The two ends of the spring 44 are fixed to the support frame 41 and the pressure frame 42 respectively, so that the pressure frame 42 has the tendency to press the clamping plate frame 3.

[0040] The circulation ring 51 is a closed ring track, and the roller 53 rolls close to the outer wall of the circulation ring 51 to support the cyclic movement of the pressing mechanism 4.

[0041] The arc bracket 64 of the end anti-drop guide mechanism 6 is located at the bend of the circulating conveying path, with its arc concave surface facing the conveying direction of the single board, and the buffer spring 65 provides buffer pressure to prevent the single board from slipping.

[0042] The drive shaft 22 and the transmission shaft 25 are arranged in parallel and are located at both ends of the circulating conveyor frame 11, forming a closed-loop conveying path.

[0043] The circulating veneer dryer of the present invention, through the design of the above technical solution, realizes continuous circulating drying of veneers in the drying room, significantly improving drying efficiency, while ensuring safe conveying and drying quality of veneers.

[0044] The circulating veneer dryer of the present invention, through the design of the above technical solution, realizes continuous circulating drying of veneers in the drying room, significantly improving drying efficiency, while ensuring safe conveying and drying quality of veneers.

[0045] The working principle and usage process of this invention are as follows: The veneer to be dried is placed on the clamping frame 3. The drive motor 21 is started, and the output end of the drive motor 21 drives the drive spindle 22 to rotate. The main sprocket 1 23 and main sprocket 24 on the drive spindle 22 rotate accordingly, thereby driving the chain 1 28 and chain 29 to circulate. Chain 1 28 and chain 29 are connected to the support frame 41 and the clamping frame 3 respectively via right-angle pieces 7. Therefore, the support frame 41 and the clamping frame 3 move along the circulatory path as the chains circulate. During the movement, the spring 44 in the pressing mechanism 4 constantly applies pressure to the pressing frame 42, causing the pressing frame 42 to press the veneer on the clamping frame 3, effectively preventing the veneer from slipping or falling due to vibration, airflow, or other factors during transport.

[0046] Meanwhile, the rollers 53 in the support mechanism 5 roll close to the outer wall of the circulation ring 51, providing stable support for the pressing mechanism 4 and ensuring the smoothness of the pressing mechanism 4 during circulation. When the clamping frame 3 and the pressing mechanism 4 move to the turning point of the circulation path, the arc bracket 64 of the end anti-drop guide mechanism 6 plays a guiding role. Its arc concave surface faces the single board conveying direction, and the buffer spring 65 provides buffer pressure, further preventing the single board from slipping at the turning point.

[0047] Inside the drying chamber 1, heating devices are evenly distributed around the perimeter and top to uniformly heat the veneer, ensuring that the veneer is heated evenly during the drying process and reaches the required moisture content range. Through continuous circulating drying, the circulating veneer dryer of this invention significantly improves drying efficiency while ensuring the safe transport and drying quality of the veneer, meeting the quality requirements for veneer in the production of plywood, blockboard, and other engineered wood products.

[0048] 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.

[0049] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limiting this invention.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] The embodiments described above are not exhaustive and do not limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to effectively utilize the invention and its modifications. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A circulating veneer dryer, characterized in that, include: Drying room (1); A circulating conveyor frame (11) is installed in the drying room (1). A circulating conveyor mechanism (2) is installed on the circulating conveyor frame (11). Several clamping frames (3) are installed on the circulating conveyor mechanism (2) along the circulating path, and several pressing mechanisms (4) are installed at equal intervals along the circulating path. The pressing mechanism (4) is used to squeeze the clamping frame (3) and to press the single board placed on the clamping frame (3). Supporting mechanisms (5) are installed on both sides of the pressing mechanism (4). The supporting mechanisms (5) are used to provide support along the circulating path. An end anti-drop guide mechanism (6) is installed at one end of the circulating conveyor frame (11). The circulating conveying mechanism (2) includes a drive motor (21), the output end of which is connected to a drive spindle (22). The drive spindle (22) is mounted on the circulating conveyor frame (11) through a bearing seat. A main sprocket (23) and a main sprocket (24) are sleeved on the drive spindle (22). A transmission secondary shaft (25) is provided on the other side of the circulating conveyor frame (11). A secondary sprocket (26) and a secondary sprocket (27) are sleeved on the transmission secondary shaft (25). A chain (28) is arranged around the main sprocket (23) and the secondary sprocket (26). A chain (29) is arranged around the main sprocket (24) and the secondary sprocket (27). The clamping mechanism (4) includes a support frame (41), a clamping frame (42) hinged to the support frame (41) via a hinge shaft (43), and a spring (44) connecting the support frame (41) and the clamping frame (42). The support mechanism (5) includes a circulation ring (51) fixed on the circulation conveyor frame (11), a connecting rod (52) is connected to the side of the support frame (41), and a roller (53) is provided at the end of the connecting rod (52). The roller (53) rolls along the outer wall of the circulation ring (51). The end anti-drop guide mechanism (6) includes a frame fixing tube (61) fixed to the end of the circulating conveyor frame (11), an assembly frame (62) installed on the frame fixing tube (61), a locking bolt (63) passing through the assembly frame (62) and the frame fixing tube (61), and an arc bracket (64) connected to the assembly frame (62) by a buffer spring (65), and the lower part of the arc bracket (64) is hinged to the assembly frame (62); the arc bracket (64) of the end anti-drop guide mechanism (6) is located at the turning point of the circulating conveyor path, and its arc concave surface faces the single board conveying direction, and the buffer spring (65) provides buffer pressure to prevent the single board from slipping; The right-angle piece (7) connects the support frame (41) and the clamp frame (3) to the chain one (28) and the chain two (29) respectively.

2. The circulating veneer dryer according to claim 1, characterized in that: The drying chamber (1) is equipped with a heating device, which is evenly distributed around the perimeter and top of the drying chamber (1) to ensure that the veneer is heated evenly during the drying process.

3. A circulating veneer dryer according to claim 1, characterized in that: The pressure frame (42) is rotatably connected to the support frame (41) via a hinge shaft (43). The two ends of the spring (44) are fixed to the support frame (41) and the pressure frame (42) respectively, so that the pressure frame (42) has the tendency to press the clamping plate frame (3).

4. A circulating veneer dryer according to claim 1, characterized in that: The circulation ring (51) is a closed circular track, and the roller (53) rolls close to the outer wall of the circulation ring (51) to support the cyclic movement of the pressing mechanism (4).

5. A circulating veneer dryer according to claim 1, characterized in that: The drive shaft (22) and transmission shaft (25) are arranged in parallel and are located at both ends of the circulating conveyor frame (11) to form a closed-loop conveying path.

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