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CN-122015460-A - Circulation type veneer dryer

CN122015460ACN 122015460 ACN122015460 ACN 122015460ACN-122015460-A

Abstract

The invention relates to the technical field of drying equipment and discloses a circulating type veneer dryer which comprises a drying room and a circulating conveying rack arranged in the drying room, wherein a circulating conveying mechanism is arranged on the circulating conveying rack, a plurality of clamping plates frames are arranged on the circulating conveying mechanism along a circulating path, a plurality of pressing mechanisms are arranged at equal intervals along the circulating path, and the pressing mechanisms are used for pressing the clamping plates frames and are used for pressing veneers placed on the clamping plates frames. Through the design of the circulating conveying mechanism, continuous circulating drying of the single board in the drying room is realized, and the drying efficiency is remarkably improved. The clamp plate frame and the pressing mechanism arranged on the circulating conveying mechanism effectively prevent the single plate from sliding off or falling down due to vibration, airflow and other factors in the conveying process, and ensure the safe conveying and drying quality of the single plate.

Inventors

  • LI DEHUA
  • LI MINGYU

Assignees

  • 山东临朐巨能烘干设备有限公司

Dates

Publication Date
20260512
Application Date
20260410

Claims (6)

  1. 1. The circulating single-board dryer is characterized by comprising a drying room (1); The drying room comprises a circulating conveying rack (11) arranged in the drying room (1), wherein a circulating conveying mechanism (2) is arranged on the circulating conveying rack (11), a plurality of clamping plates frames (3) are arranged on the circulating conveying mechanism (2) along a circulating path, a plurality of pressing mechanisms (4) are arranged at equal intervals along the circulating path, the pressing mechanisms (4) are used for pressing the clamping plates frames (3) and are used for pressing single plates placed on the clamping plates frames (3), supporting mechanisms (5) are arranged on two sides of the pressing mechanisms (4), the supporting mechanisms (5) are used for providing support along the circulating path, and an end part anti-drop guide mechanism (6) is arranged at one end of the circulating conveying rack (11); The circulating conveying mechanism (2) comprises a driving motor (21), the output end of the driving motor (21) is connected with a driving main shaft (22), the driving main shaft (22) is installed on a circulating conveying frame (11) through a bearing seat, a first main chain wheel (23) and a second main chain wheel (24) are sleeved on the driving main shaft (22), a transmission auxiliary shaft (25) is arranged on the other side of the circulating conveying frame (11), a first auxiliary chain wheel (26) and a second auxiliary chain wheel (27) are sleeved on the transmission auxiliary shaft (25), a first chain (28) is arranged around the first main chain wheel (23) and the first auxiliary chain wheel (26), and a second chain (29) is arranged around the second main chain wheel (24) and the second auxiliary chain wheel (27); the pressing mechanism (4) comprises a supporting frame (41), a pressing frame (42) hinged with the supporting frame (41) through a hinge shaft (43), and a spring (44) for connecting the supporting frame (41) and the pressing frame (42); the supporting mechanism (5) comprises a circulating ring (51) fixed on the circulating conveying frame (11), a connecting rod (52) is connected to the side edge of the supporting frame (41), a roller (53) is arranged at the end part of the connecting rod (52), and the roller (53) rolls along the outer wall of the circulating ring (51); The end anti-drop guide mechanism (6) comprises a frame fixing pipe (61) fixed at the end part of the circulating conveying frame (11), an assembly frame (62) arranged on the frame fixing pipe (61), a locking bolt (63) penetrating through the assembly frame (62) and the frame fixing pipe (61), and an arc bracket (64) connected with the assembly frame (62) through a buffer spring (65), wherein the lower part of the arc bracket (64) is hinged with the assembly frame (62); The right-angle piece (7), the supporting frame (41) and the clamping plate frame (3) are respectively connected with the first chain (28) and the second chain (29) through the right-angle piece (7).
  2. 2. The circulating single board dryer as set forth in claim 1, wherein said drying room (1) is provided with heating means, which are uniformly distributed around and on top of the drying room (1) to ensure uniform heating of the single board during drying.
  3. 3. The circulating type veneer dryer as claimed in claim 1, wherein the pressing frame (42) is rotatably connected to the supporting frame (41) through a hinge shaft (43), and two ends of the spring (44) are respectively fixed on the supporting frame (41) and the pressing frame (42), so that the pressing frame (42) has a tendency to press the clamping frame (3).
  4. 4. The circulating single-plate dryer as claimed in claim 1, wherein the circulating ring (51) is a closed annular track, and the rollers (53) roll against the outer wall of the circulating ring (51) to support the circulating motion of the pressing mechanism (4).
  5. 5. A circulating type veneer dryer as claimed in claim 1, characterized in that the arc bracket (64) of the end falling prevention guide mechanism (6) is positioned at the turning position of the circulating conveying path, the arc concave surface of the arc bracket faces the veneer conveying direction, and the buffer spring (65) provides buffer pressure to prevent the veneer from falling off.
  6. 6. The circulating single-plate dryer as claimed in claim 1, wherein the driving main shaft (22) and the transmission auxiliary shaft (25) are arranged in parallel and are respectively positioned at two ends of the circulating conveying frame (11) to form a closed-loop conveying path.

Description

Circulation type veneer dryer Technical Field The invention relates to the technical field of drying equipment, in particular to a circulating single-plate dryer. Background Veneers (usually referred to as veneer sheets obtained by rotary cutting or planing) are key raw materials for the production of artificial boards such as plywood and joinery boards. In the veneer production process, drying is one of the crucial procedures, and the aim is to reduce the water content of the veneer to the range of process requirements (usually 8% -12%), so as to meet the requirements of subsequent gluing, assembly and hot pressing processes and ensure the quality and stability of the final product. At present, the single board is dried mainly by the following modes: And (3) stacking the single plates on a frame trolley, pushing the single plates into the drying kiln, and carrying out batch type drying. The method has relatively low equipment investment, but has the obvious defects of long drying period, low efficiency, high energy consumption, large occupied area and the like. The single board is heated in the kiln and the air flow is uneven, which is easy to cause local overdry or insufficient drying and affects the quality of the single board. In addition, the loading and unloading process is tedious, and continuous production is difficult to realize. The continuous tunnel drier is characterized in that a single plate continuously moves in a long and narrow tunnel through a conveying device (such as a mesh belt, a roller and a chain) to exchange heat with a heat medium (hot air, steam and the like). Compared with a intermittent kiln, the production efficiency is improved, and continuous operation can be realized. However, the existing continuous dryer, especially the equipment adopting a single-layer conveying structure (such as a mesh belt type or a single-chain type), has the problem of overlong equipment length. In order to achieve sufficient drying time, the tunnel needs to be built very long, so that the occupied area of the factory building is huge, the civil engineering cost is high, and the heat energy utilization rate still has a lifting space (the heat recovery of tail waste gas is difficult). Multilayer continuous dryer-in order to extend the drying path in a confined space, some devices employ a multilayer structure (e.g., a mesh belt type multilayer dryer). Although this approach shortens the overall length of the device, in practical applications, particularly when handling thin and brittle veneers, there is a risk that the veneers will easily curl, deform or even break during layer transfer. More importantly, when the veneer needs to be circulated back inside the apparatus (e.g., transferred from the upper end to the lower start for reverse conveyance), the existing conveying structure lacks an effective pressing device, resulting in failure to reliably prevent the veneer from sliding or falling down in the back flow section (particularly, the inclined or vertical section) due to gravity, vibration or airflow. This not only causes wastage of the veneer, affects production efficiency, but also can clog equipment, cause malfunction and even safety accidents for the dropped veneer. Therefore, a new veneer drying technology is needed in the industry, which can obviously improve the drying efficiency, reduce the energy consumption and the occupied area on the premise of ensuring the drying quality, and can safely and reliably realize the cyclic conveying of the veneer inside the equipment, in particular to effectively prevent the veneer from falling off in the reflow process. Disclosure of Invention The present invention is directed to a circulating single board dryer, which solves the problems set forth in the above-mentioned background art. In order to achieve the above purpose, the present invention provides the following technical solutions: a technical proposal of a circulating single-board dryer comprises a drying room; The circulating conveying machine frame is arranged in the drying room, a circulating conveying mechanism is arranged on the circulating conveying machine frame, a plurality of clamping plates frames are arranged on the circulating conveying mechanism along a circulating path, a plurality of pressing mechanisms are arranged at equal intervals along the circulating path, the pressing mechanisms are used for pressing the clamping plates frames and are used for pressing single plates placed on the clamping plates frames, supporting mechanisms are arranged on two sides of the pressing mechanisms and are used for providing support along the circulating path, and an end part anti-drop guide mechanism is arranged at one end of the circulating conveying machine frame; The circulating conveying mechanism comprises a driving motor, the output end of the driving motor is connected with a driving main shaft, the driving main shaft is arranged on a circulating conveying frame through a bearing seat, a