A veneer drying apparatus

Abstract

The utility model provides a kind of single board drying device, including the drying box body of upper surface open, the inside bottom of drying box body is equipped with multiple limit strips at equal distance, two limit strips are matched to form the placement area for placing single board, the lower surface of drying box body is connected with ventilation box body, the left side of drying box body is provided with air inlet part, the right side of drying box body is provided with suction part, the air inlet part and suction part are all connected with ventilation box body by pipeline and are set, the upper surface of limit strip is both ends and is provided with the limiting piece for limiting single board;The utility model can realize improving drying uniformity and effectively control single board deformation.

Description

Technical Field

[0001] This utility model relates to the field of wood processing equipment technology, and in particular to a veneer drying device. Background Technology

[0002] As a core raw material for manufacturing engineered wood products such as plywood and blockboard, the quality of veneer drying directly affects the final product's quality grade and production cost. In the wood processing industry, the main task of veneer drying is to quickly and evenly dehydrate rotary-cut or sliced ​​wet veneers to the required moisture content range to meet the quality standards of subsequent gluing, hot-pressing, and other processes. Currently, the industry commonly uses roller dryers and mesh belt dryers, which primarily heat and dry continuously conveyed veneers through hot air convection or contact conduction. However, these methods have revealed numerous technical bottlenecks in actual production.

[0003] First, traditional drying equipment suffers from significant issues with drying uniformity. Due to the lack of scientifically designed hot air flow paths within the drying chamber, the temperature and airflow fields are unevenly distributed. This unevenness results in significant differences in heating and ventilation effects on veneers in different locations, and even different areas of the same veneer, easily leading to inconsistent moisture content in localized areas. This uneven drying phenomenon can cause a series of quality problems such as veneer warping, deformation, and cracking, not only lowering the product grade but also increasing the difficulty of subsequent processing.

[0004] Secondly, existing equipment suffers from serious deficiencies in veneer positioning and deformation control. During the drying process, wet veneers undergo significant shrinkage and deformation due to moisture evaporation and heating, while traditional equipment lacks effective dynamic limiting mechanisms. Rigid fixing hinders the natural shrinkage of the veneers, leading to stress concentration and tearing; without any restraint, veneer curling obstructs airflow, creating a vicious cycle. This dilemma severely impacts drying efficiency and product quality.

[0005] In addition, excessive energy consumption is a prominent drawback of traditional drying equipment. Due to its bulky structure and unreasonable airflow organization, a large amount of heat energy needs to be continuously input to maintain the drying environment. At the same time, the heat exchange efficiency between hot air and the single-panel is low, and a large amount of heat energy is discharged from the system without being fully utilized, resulting in serious energy waste. Summary of the Invention

[0006] In view of this, the purpose of this utility model is to provide a veneer drying device that can improve drying uniformity and effectively control veneer deformation.

[0007] This utility model is implemented using the following method: a single-layer drying device includes a drying chamber with an open upper surface. Multiple limiting strips are evenly spaced on the bottom surface of the drying chamber, and two limiting strips cooperate to form a placement area for placing single-layer boards. A ventilation chamber is connected to the lower surface of the drying chamber. An air inlet is provided on the left side of the drying chamber, and an air suction device is provided on the right side of the drying chamber. Both the air inlet and the air suction device are connected to the ventilation chamber through pipes. Limiting devices for limiting single-layer boards are provided at both ends of the upper surface of the limiting strips.

[0008] Furthermore, the front of the ventilation box is connected to an air intake pipe and an exhaust pipe.

[0009] Furthermore, the limiting component includes an I-shaped support frame, with the I-shaped support frame provided at both the left and right ends of the upper surface of the limiting strip. Rubber buffer blocks are provided at both the upper and lower ends of the front and rear surfaces of the I-shaped support frame. T-shaped plates are embedded and connected at both the front and rear ends of the I-shaped support frame, and the T-shaped plates are connected to the rubber buffer blocks. Multiple ball bearings are evenly spaced on the T-shaped plates.

[0010] Furthermore, the air intake component includes an air intake hopper, which is disposed on the left side of the drying chamber, and the air intake end of the air intake hopper is provided with a first filter plate.

[0011] Furthermore, the air intake component includes an air intake hopper, which is disposed on the right side of the drying chamber, and a second filter plate is provided at the air outlet end of the air intake hopper.

[0012] The beneficial effects of this utility model are as follows: This utility model includes a drying chamber with an open upper surface. Multiple limiting strips are evenly spaced on the bottom surface of the drying chamber. Two limiting strips cooperate to form a placement area for placing veneers. A ventilation chamber is connected to the lower surface of the drying chamber. An air inlet is provided on the left side of the drying chamber, and an air suction device is provided on the right side of the drying chamber. Both the air inlet and the air suction device are connected to the ventilation chamber through pipes. Limiting devices for limiting veneers are provided at both ends of the upper surface of the limiting strips. The placement area formed by the limiting strips and the ventilation chamber work together to achieve directional airflow circulation. Combined with the buffer limiting structure to balance the shrinkage stress of the veneers, it has the advantages of improving drying uniformity, effectively controlling veneer deformation, and reducing energy consumption. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a side view of the present invention.

[0015] Figure 3 This is the front view of the present invention. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Please see Figures 1 to 3 As shown, this utility model provides an embodiment: a veneer drying device, including a drying chamber 1 with an open upper surface, a plurality of limiting strips 2 are evenly arranged on the bottom surface of the drying chamber 1, and two pairs of limiting strips 2 cooperate to form a placement area 3 for placing veneers, a ventilation chamber 4 is connected to the lower surface of the drying chamber 1, an air inlet 5 is arranged on the left side of the drying chamber 1, and an air suction 6 is arranged on the right side of the drying chamber 1, both the air inlet 5 and the air suction 6 are connected to the ventilation chamber 4 through pipes 51, and limiting elements 7 for limiting veneers are arranged at both ends of the upper surface of the limiting strips 2.

[0018] The limiting strips are long, parallel strips arranged at the bottom of the drying oven, typically made of aluminum alloy profiles. Their equidistant arrangement creates standardized spaces for individual panels, ensuring uniform spacing between adjacent panels and promoting airflow. The venting chamber is a sealed cavity connected to the bottom of the drying oven, typically formed by welding steel plates. It integrates the intake and exhaust systems, creating a directional airflow circulation path. The I-beam support frame is a frame structure with a horizontal support surface, typically made of stamped metal. Rubber buffer blocks on the front and rear surfaces absorb the shrinkage stress of the panels. T-shaped plates are embedded at both ends of the support frame and fitted with ball bearings, allowing for slight sliding of the panels along their length during the drying process.

[0019] Specifically, the upper surface of the drying chamber is open to facilitate the vertical placement of veneers, while the placement area formed by the limiting strips restricts the lateral displacement of the veneers. The air intake hopper delivers hot air to the ventilation chamber through pipes, and the airflow is evenly distributed to the bottom of the drying chamber, rising along the gaps between the limiting strips and passing through the stacked veneer layers. The suction hopper creates negative pressure on the right side of the drying chamber, prompting the airflow to flow in a directional manner and remove moisture. The rubber buffer blocks of the I-beam support frame provide elastic support when the veneers shrink, and the ball bearings on the T-shaped plate reduce the frictional resistance between the veneers and the support frame, allowing the veneers to shrink freely in the longitudinal direction.

[0020] Compared to existing technologies, the equidistantly arranged limiting strips create a standardized placement space, ensuring consistent veneer spacing and preventing localized airflow blockages caused by uneven stacking. The venting housing integrates the intake and exhaust systems, forming a closed-loop airflow circulation path to reduce heat loss. The I-beam support frame, combined with a ball bearing structure, allows for longitudinal contraction while fixing the veneer position, eliminating stress concentration caused by rigid clamping.

[0021] Through the above technical solutions, this application achieves uniform distribution of drying airflow, reducing the difference in moisture content in different areas of the veneer; the elastic limiting structure adapts to the shrinkage and deformation of the veneer, avoiding drying dead zones caused by curling or displacement; and the closed-loop airflow circulation system improves thermal energy utilization and reduces energy consumption per unit output.

[0022] Please continue reading. Figures 1 to 3 As shown, in one embodiment of the present invention, the ventilated box 4 is connected to an air inlet pipe 41 and an exhaust pipe 42 on the front.

[0023] The intake pipe is the conduit connecting the external air source to the ventilation box, and can be a flanged metal pipe used to deliver dry gas into the ventilation box. The exhaust pipe is the conduit connecting the ventilation box to the external exhaust system, and can be a plastic pipe with a sealing ring used to discharge humid waste gas from the ventilation box.

[0024] Specifically, the air inlet pipe is installed on one side of the front of the ventilation box and connects to an external hot air supply device, allowing dry hot air to enter the ventilation box through the air inlet pipe. The exhaust pipe is installed on the other side of the front of the ventilation box and connects to an extraction device, actively removing moisture-containing waste gas through the exhaust pipe. During the drying process, the air inlet and exhaust pipes form a directional airflow channel, ensuring that the dry gas flows in from the air inlet pipe and is evenly distributed inside the ventilation box before carrying away moisture and exiting through the exhaust pipe, preventing disorderly gas flow within the box.

[0025] Compared to existing technologies, traditional drying devices typically employ a single duct or open airflow circulation, resulting in the mixing of hot air and exhaust gas, leading to low heat exchange efficiency. This solution achieves directional gas delivery and discharge through independently designed inlet and outlet pipes, reducing heat loss and preventing exhaust gas backflow from interfering with the drying process.

[0026] Through the above technical solution, this application solves the problem of heat energy waste caused by unreasonable airflow organization in traditional drying equipment. By optimizing the gas flow path, the heat utilization rate is improved, the temperature distribution inside the drying chamber is more uniform, and the dehydration efficiency of single boards is improved.

[0027] Please continue reading. Figures 1 to 3 As shown, in one embodiment of the present invention, the limiting member 7 includes an I-shaped support frame 71. The I-shaped support frame 71 is provided at both the left and right ends of the upper surface of the limiting strip 2. Rubber buffer blocks 72 are provided at both the upper and lower ends of the front and rear surfaces of the I-shaped support frame 71. T-shaped plates 73 are embedded and connected at both the front and rear ends of the I-shaped support frame 71, and the T-shaped plates 73 are connected to the rubber buffer blocks 72. Multiple ball bearings 74 are evenly spaced on the T-shaped plates 73.

[0028] The I-beam support frame refers to a metal support structure with an I-shaped cross-section. It can be fixed to the upper surface of the limiting strip by welding or bolting. Its vertical web and horizontal flanges form a stable support surface to support the edge of the veneer. The rubber buffer block is a block-shaped component made of elastic rubber material. It can be fixed to the surface of the I-beam support frame by adhesive or snap-fit. It absorbs stress through its own deformation when the veneer shrinks or contracts due to heat. The T-shaped plate is a metal plate with a T-shaped cross-section. It can be embedded in the end of the I-beam support frame through a groove or plug-in structure. Its horizontal extension is used to install ball bearings. The ball bearings are smooth, spherical rolling elements, made of stainless steel or ceramic, and are embedded at equal intervals into the surface of the T-shaped plate through a bearing structure to reduce frictional resistance when the veneer moves.

[0029] Specifically, I-beam support frames are symmetrically arranged at both ends of the limiting strip, forming a lateral positioning space for the veneer. When the veneer contracts due to heat, its edges contact the I-beam support frames. At this time, the rubber buffer blocks are compressed and undergo elastic deformation, allowing the veneer to contract freely within a certain range. T-shaped plates are embedded at both ends of the I-beam support frames, with their horizontal extensions extending beyond the support frame body, forming the longitudinal limiting boundary of the veneer. Ball bearings are arranged along the surface of the T-shaped plates. When the veneer undergoes slight displacement due to airflow or contraction, they reduce friction through rolling contact, preventing scratches on the veneer surface. The rubber buffer blocks and T-shaped plates form a linkage structure, releasing stress through elastic deformation when the veneer contracts, while maintaining the stability of the limiting structure.

[0030] Compared to existing technologies, traditional drying devices often use fixed baffles or rigid clamps to restrict the position of the veneer, which cannot adapt to the deformation of the veneer during the drying process, easily leading to veneer tearing or airflow obstruction. This solution uses a composite limiting structure of elastic buffer and rolling contact to maintain the positioning accuracy of the veneer while allowing the veneer to contract freely in the longitudinal direction, thus resolving the contradiction between rigid clamping and free placement.

[0031] Through the above technical solution, this application achieves adaptive adjustment of dynamic deformation during the drying process of veneer, avoiding stress concentration or surface damage caused by rigid constraints. The ball bearing structure reduces the displacement resistance of the veneer, preventing the veneer from shifting and piling up due to friction, while the rubber buffer block effectively absorbs shrinkage stress, ensuring unobstructed airflow channels within the drying chamber, thereby improving drying uniformity.

[0032] Please continue reading. Figures 1 to 3 As shown, in one embodiment of the present invention, the air intake component 5 includes an air intake hopper 51, which is disposed on the left side of the drying chamber 1, and a first filter plate 52 is disposed at the air intake end of the air intake hopper 51.

[0033] The air intake hopper refers to the airflow guiding structure that directs external air into the drying chamber. It can be implemented using a conical or flared design, with the flared end facing outwards to increase the air intake cross-sectional area, and the constricted end connecting to the drying chamber to form a directional airflow channel. This structure reduces airflow resistance and improves airflow uniformity.

[0034] The first filter plate refers to a porous filter assembly installed at the air inlet. It can be implemented using a stainless steel mesh or a composite fiber filter media layered structure, with its pore size designed to intercept dust, fiber debris, and other impurities. This filter plate prevents contaminants from entering the drying system through physical interception.

[0035] Specifically, an air inlet hopper is installed on the left side of the drying chamber. External air enters through the flared end of the inlet hopper and is accelerated through the constricted end to form a directional airflow. A first filter plate is installed at the air inlet end of the inlet hopper, filtering impurities before the airflow enters. For example, a metal mesh filter plate is detachably fixed to the edge of the inlet hopper and can be maintained and replaced via bolts. When external air flows past the filter plate, dust and other particles are blocked on the outside of the filter plate, while clean air enters the ventilation chamber and is evenly distributed throughout the drying chamber. This prevents impurities from accumulating inside the drying chamber and reduces the impact on the surface quality of the veneer.

[0036] Compared to existing technologies, traditional veneer drying devices typically lack a filter structure at the air inlet, allowing airborne impurities to enter the equipment during the drying process. These impurities can clog ventilation pipes or adhere to the veneer surface, reducing heat exchange efficiency and increasing equipment maintenance frequency. This solution adds a first filter plate at the air inlet to separate impurities before the airflow enters, protecting the internal cleanliness of the drying system while maintaining smooth airflow.

[0037] Through the above technical solution, this application can effectively reduce the contamination of the veneer surface and ventilation channels by impurities during the drying process, and avoid the problem of local airflow obstruction caused by impurity accumulation. The continuous supply of clean air helps maintain a stable temperature field and airflow field inside the drying chamber, thereby improving the uniformity of veneer drying and reducing the frequency of equipment downtime maintenance due to impurity blockage.

[0038] Please continue reading. Figures 1 to 3 As shown, in one embodiment of the present invention, the air intake component 6 includes an air intake hopper 61, which is disposed on the right side of the drying chamber 1, and a second filter plate 62 is disposed at the air outlet end of the air intake hopper 61.

[0039] The first part, the air intake hopper, is a funnel-shaped structure used to guide and collect airflow. It can be made by welding metal sheets or by injection molding high-temperature resistant plastic. Its conical structure effectively converges the airflow. The second filter plate is a filter assembly located at the airflow outlet. It can be made using stainless steel woven mesh or a multi-layer composite filter paper structure to intercept fiber debris and dust particles shed during the drying process.

[0040] Specifically, the suction hopper is installed on the right side of the drying chamber and connects to the ventilation chamber, forming a directional airflow channel. A second filter plate is positioned at the outlet of the suction hopper. When the external suction equipment is running, the humid, hot air inside the drying chamber passes through the surface of the veneer, enters the ventilation chamber through the gaps in the limiting strips, and is finally discharged through the suction hopper. During this process, the second filter plate continuously intercepts solid impurities moving with the airflow, preventing impurities from entering the exhaust pipe and causing blockages. The conical structure of the suction hopper creates a uniform velocity field before the airflow exits, preventing localized turbulence from causing secondary moisture absorption by the veneer.

[0041] Compared to existing technologies, traditional drying devices lack a filtration structure at the exhaust end, causing fiber debris to accumulate in the pipes and create airflow resistance, forcing an increase in fan power to maintain a negative pressure environment. This application, through the installation of a second filter plate, completes impurity separation during the exhaust stage, protecting the exhaust system and maintaining stable airflow organization, thus avoiding increased energy consumption caused by pipe blockage.

[0042] Through the above technical solution, this application effectively solves the problem of system efficiency reduction caused by impurities spreading with airflow during the veneer drying process. By maintaining the unobstructed exhaust channel through physical interception, it ensures the uniformity and stability of airflow distribution in the drying chamber, thereby improving the consistency of veneer drying quality.

[0043] The above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall be covered by the present utility model.

Claims

1. A single-layer drying device, characterized in that: The device includes a drying chamber with an open upper surface. Multiple limiting strips are evenly spaced on the bottom surface of the drying chamber, with pairs of limiting strips forming a placement area for placing veneers. A ventilation chamber is connected to the lower surface of the drying chamber. An air inlet is located on the left side of the drying chamber, and an air intake is located on the right side of the drying chamber. Both the air inlet and the air intake are connected to the ventilation chamber via pipes. Limiting elements for positioning the veneers are located at both ends of the upper surface of the limiting strips.

2. The veneer drying device according to claim 1, characterized in that: The front of the ventilation box is connected to an air inlet pipe and an exhaust pipe.

3. The veneer drying device according to claim 1, characterized in that: The limiting component includes an I-shaped support frame. The I-shaped support frame is provided at both the left and right ends of the upper surface of the limiting strip. Rubber buffer blocks are provided at both the upper and lower ends of the front and rear surfaces of the I-shaped support frame. T-shaped plates are embedded and connected at both the front and rear ends of the I-shaped support frame, and the T-shaped plates are connected to the rubber buffer blocks. Multiple ball bearings are evenly spaced on the T-shaped plates.

4. The veneer drying device according to claim 1, characterized in that: The air intake component includes an air intake hopper, which is located on the left side of the drying chamber. A first filter plate is provided at the air intake end of the air intake hopper.

5. A veneer drying device according to claim 1, characterized in that: The air intake component includes an air intake hopper, which is located on the right side of the drying chamber. A second filter plate is provided at the air outlet end of the air intake hopper.

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