A tunnel-type drying house for drying single board wood

Abstract

This utility model discloses a tunnel-type drying chamber for drying veneer wood, relating to the field of wood drying technology. It includes a furnace frame with four sets of positioning frames fixed longitudinally inside. Air inlet frames are mounted on the left and right sides of the furnace frame. An electric heating chamber for heating air is located on the inner wall of the furnace frame corresponding to the air inlet frames. An exhaust fan is mounted between the four sets of positioning frames, and a drive shaft positioning plate is fixed above the exhaust fan between two sets of positioning frames. This utility model, through the arrangement of guide plates and baffles, allows the air circulating vertically within the furnace frame to be blown from the sides onto the veneer wood, extending the heating time and eliminating blind spots between the veneer wood and the clamping components, ensuring the veneer wood is fully heated and dried. Simultaneously, it collects and centrally discharges water vapor from above the furnace frame, preventing it from dripping onto the veneer wood being dried below, thus improving the drying quality of the veneer wood.

Description

Technical Field

[0001] This utility model relates to the field of wood drying, specifically a tunnel-type drying room for drying veneer wood. Background Technology

[0002] Veneer is produced by cutting economically valuable trees into strips of specified thickness, typically between 0.5 and 3.2 mm, using mechanical equipment (with or without gussets) to slice the wood along the circular surface of the trunk. According to national standards, this is done by cutting trees into strips of varying thickness. Veneer, as a basic material for engineered wood products, is widely used in construction, industry, agriculture, and the military. However, due to its unique physical properties and economic limitations, natural drying has long been the primary method for drying veneer both domestically and internationally. This method is constrained by factors such as weather conditions, available space, and manpower. In rainy regions of my country, the veneer is often soaked in sewage, making it prone to mold and warping, significantly impacting the drying quality. Furthermore, natural drying requires extensive outdoor space and considerable manual labor, severely hindering the industry's industrialization, scaling up, and modernization.

[0003] A search of the China Patent Network revealed a patent announcement number CN2167701365U, which discloses a chain conveyor device for tunnel drying of wood veneer. This device can vertically clamp multiple pieces of wood veneer at intervals and circulate them in the tunnel drying chamber for drying. The material is fed at the upper part of the entrance end of the tunnel drying chamber and discharged at the lower part of the entrance end of the tunnel drying chamber, realizing continuous flow drying operation and achieving good drying effect for wood veneer.

[0004] Wood is moved and dried in a tunnel-type drying chamber via chain plates and various components. The movement has a certain speed. Relying solely on the directional exhaust method of the hot air furnace, the hot air cannot be guaranteed to enter the space between adjacent boards, resulting in boards that are not completely dried. This leads to low-quality dried boards and may even require secondary drying. Therefore, a tunnel-type drying chamber for drying veneer wood is proposed. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a tunnel-type drying room for drying veneer wood, so as to solve the technical problems mentioned in the background.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a tunnel-type drying chamber for drying veneer wood, comprising a furnace frame, four sets of positioning frames fixed longitudinally inside the furnace frame, air inlet frames mounted on the left and right sides of the furnace frame, an electric heating chamber for heating air located on the inner wall of the furnace frame corresponding to the air inlet frames, an exhaust fan mounted between the four sets of positioning frames, a drive shaft positioning plate fixed above the exhaust fan between two sets of positioning frames, a dehumidification assembly mounted on the top of the furnace frame, and guide plates fixed on the left and right inner walls of the furnace frame near the top, with two sets of baffles welded at an incline on the side of the guide plate near the positioning frames, and an air passage groove opened at the contact position between each set of baffles and the guide plate.

[0007] As a preferred technical solution, the outer walls of the four sets of positioning frames are fixed with crossbeams by bolts, and the exhaust fan is installed inside the crossbeams by screws.

[0008] As a preferred technical solution, the air inlet frame is equipped with a staggered desiccant, the air inlet frame is fixed to the outer wall of the furnace frame with screws, and the outer wall of the furnace frame is provided with an air inlet at a position corresponding to the air inlet frame.

[0009] As a preferred technical solution, side baffles are fixed on the front and rear surfaces of the furnace frame, and the side baffles are fixed to the upper inner wall of the furnace frame.

[0010] As a preferred technical solution, the dehumidification assembly includes a cylinder fixed at the center of the top of the furnace frame. The top of the furnace frame has a dehumidification hole that communicates with the bottom of the cylinder. Multiple sets of outer conical rings are fixed on the curved inner wall of the cylinder. A temporary storage ring groove is provided on the lower inner wall of the cylinder. A guide cavity communicating with the temporary storage ring groove is reserved inside the cylinder. Multiple sets of drainage holes are provided on the top of each set of outer conical rings on the curved inner wall of the cylinder.

[0011] As a preferred technical solution, the multiple sets of outer conical rings are distributed at equal intervals along the longitudinal axis of the cylinder, and the diameter of the holes in the middle of the multiple sets of outer conical rings decreases from bottom to top.

[0012] As a preferred technical solution, multiple sets of flow-blocking plates are fixed between the two sets of positioning frames. The multiple sets of flow-blocking plates are located below the drive shaft positioning plate in a straight line. The drive shaft positioning plate, flow-blocking plates, and flow-guide plates constitute a longitudinal downward discharge channel.

[0013] In summary, the present invention has the following main advantages:

[0014] This invention, through the arrangement of guide plates and baffles, allows the air circulating up and down within the furnace frame to be blown from the side onto the veneer wood, which can extend the heating time of the veneer wood and eliminate blind spots between the veneer wood and the clamping components, ensuring that the veneer wood is fully heated and dried. At the same time, it collects and centrally discharges the water vapor above the furnace frame, preventing it from dripping onto the veneer wood being dried below, thus improving the drying quality of the veneer wood. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a three-dimensional unfolded structural diagram of the present invention;

[0017] Figure 3 This is a structural diagram of the positioning frame and exhaust fan of this utility model;

[0018] Figure 4 This is a cross-sectional view of the furnace frame of this utility model;

[0019] Figure 5 This is a cross-sectional view of the dehumidification component of this utility model.

[0020] In the diagram: 100, furnace frame; 101, side baffle; 110, positioning frame; 111, crossbeam; 120, air inlet frame; 130, dehumidification assembly; 131, drain pipe; 132, cylinder; 133, outer cone ring; 134, guide cavity; 135, drain hole; 136, temporary storage ring groove; 140, electric heating chamber; 150, guide plate; 160, baffle plate; 161, air passage groove; 170, exhaust fan; 180, drive shaft positioning plate; 190, baffle plate. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0022] The embodiments of this utility model will be described below based on its overall structure.

[0023] A tunnel-type drying chamber for drying veneer wood, such as Figures 1 to 5As shown, the furnace includes a furnace frame 100, with four sets of positioning frames 110 fixed longitudinally inside the furnace frame 100. Air inlet frames 120 are installed on the left and right sides of the furnace frame 100. An electric heating chamber 140 for heating air is provided on the inner wall of the furnace frame 100 corresponding to the air inlet frames 120. An exhaust fan 170 is installed between the four sets of positioning frames 110. A drive shaft positioning plate 180 is fixed above the exhaust fan 170 between two sets of positioning frames 110. A dehumidification assembly 130 is installed on the top of the furnace frame 100. A guide plate 150 is fixed on the left and right inner walls of the furnace frame 100 near the top. Two sets of baffles 160 are welded at an incline on the side of the guide plate 150 near the positioning frames 110. An air passage 161 is opened at the contact position between each set of baffles 160 and the guide plate 150.

[0024] The dehumidification assembly 130 includes a cylindrical body 132 fixed at the center of the top of the furnace frame 100. The top of the furnace frame 100 is provided with a dehumidification hole that communicates with the bottom of the cylindrical body 132. Multiple sets of outer conical rings 133 are fixed on the curved inner wall of the cylindrical body 132. A temporary storage ring groove 136 is provided on the lower inner wall of the cylindrical body 132. A guide cavity 134 that communicates with the temporary storage ring groove 136 is reserved inside the cylindrical body 132. Multiple sets of drainage holes 135 are provided on the top of each set of outer conical rings 133 on the curved inner wall of the cylindrical body 132.

[0025] When the exhaust fan 170 operates, it creates a negative pressure in the space below it. At this time, outside air surges towards the air inlet frame 120 and enters the furnace frame 100. The electric heating chamber 140 heats the incoming air, which then rises due to the action of the exhaust fan 170. Along the way, it heats and dries the veneer wood. Finally, the hot air impacts the upper inner wall of the furnace frame 100 and flows to both sides, then towards the inner walls of the furnace frame 100. The hot air comes into contact with the side plates of the guide plate 150, changing its trajectory and flowing downwards towards the side closer to the veneer wood. Due to the obstruction of the baffle plate 160, some of the hot air... The air trajectory changes again, blowing hot air from the side of the veneer into the adjacent veneer space, which can blow hot air into the gap between the veneer and the clamping components, eliminating the blind spots in the heating and drying of the veneer and extending the heating time of the veneer, so that the veneer is fully heated and dried. Another part of the air will flow through the air channel 161 to the lower baffle 160, which can eliminate the blind spots of the veneer from multiple heights, thereby improving the drying quality of the veneer. Finally, the air will flow down and re-enter the electric heating chamber 140 for secondary heating, and can be dried again by the exhaust fan 170.

[0026] When hot air flows towards the upper inner wall of the furnace frame 100, some of the air will be discharged to the outside through the dehumidification component 130, thereby expelling the moisture generated during the drying of veneer wood. The moisture in the air will adhere to the inner wall of the outer conical ring 133 and the cylinder 132 due to the upward flow. The moisture will eventually condense into water droplets, which will flow along the upper and lower inclined surfaces of the outer conical ring 133 to the inner wall of the cylinder 132, eventually converging into water and entering the guide cavity 134 through the drain hole 135. In the guide cavity 134, the water will flow downward into the temporary storage ring groove 136 and be discharged into the designated collection cylinder through the drainage pipe 131. This can prevent the moisture from condensing into water droplets in the cylinder 132 and dripping down onto the veneer wood, preventing secondary wetting of the veneer wood and further improving the quality of veneer wood drying.

[0027] Please refer to this carefully. Figure 1 , Figure 2 and Figure 3 The outer walls of the four positioning frames 110 are bolted to the crossbeams 111, and the exhaust fan 170 is installed inside the crossbeams 111 with screws.

[0028] The crossbeam 111 is used to position the exhaust fan 170, so that it is stably placed in the middle of the conveying device, which can heat and dry the veneer wood passing from above and below.

[0029] Please refer to this carefully. Figure 1 , Figure 2 and Figure 4 The air inlet frame 120 is equipped with a staggered desiccant. The air inlet frame 120 is fixed to the outer wall of the furnace frame 100 with screws. The outer wall of the furnace frame 100 and the air inlet frame 120 are provided with air inlets at corresponding positions.

[0030] The air entering the furnace frame 100 is dehumidified to ensure that the heated air is in a relatively dry state, so that it can better absorb the moisture in the veneer wood and achieve a better drying effect on the veneer wood.

[0031] Meanwhile, the air inlet frame 120 can be easily disassembled using screws to replace the internal desiccant.

[0032] Please refer to this carefully. Figure 2 and Figure 3 Side baffles 101 are fixed to the front and rear surfaces of the furnace frame 100, and the side baffles 101 are fixed to the upper inner wall of the furnace frame 100.

[0033] The hot air flowing towards the top of the furnace frame 100 is constrained, preventing it from flowing towards the front and back of the furnace frame 100, and ensuring that the air flows along a preset trajectory to the guide plate 150.

[0034] Please refer to this carefully. Figure 4 and Figure 5Multiple sets of outer conical rings 133 are distributed at equal intervals along the longitudinal axis of the cylinder 132, and the diameter of the holes in the middle of the multiple sets of outer conical rings 133 decreases from bottom to top.

[0035] By ensuring that the amount of humid hot air discharged is less than the amount of air intake, the hot air can remain in the furnace frame 100 for a longer period of time, thereby reducing heat loss and indirectly improving the heating and drying efficiency of veneer wood.

[0036] Please refer to this carefully. Figure 2 , Figure 3 and Figure 4 Multiple sets of baffles 190 are fixed between the two sets of positioning frames 110. The multiple sets of baffles 190 are located below the drive shaft positioning plate 180 and are arranged in a straight line. The drive shaft positioning plate 180, the baffles 190 and the guide plate 150 form a longitudinal downward discharge channel.

[0037] The downward-flowing hot air is constrained by the exhaust channel and can approach the electric heating chamber 140 until it enters and is reheated. The negative pressure generated by the exhaust fan 170 causes the reheated air to be discharged from the electric heating chamber 140 and flow to the exhaust fan, and finally heat and dry the veneer wood above.

[0038] The drive shaft positioning plate 180 is used to position the conveying device installed inside the furnace frame 100, so that it can be used to transport veneer wood from multiple furnace frames 100.

[0039] During operation, the exhaust fan 170 creates a negative pressure in the space below it. At this time, outside air surges towards the air inlet frame 120 and enters the furnace frame 100. The electric heating chamber 140 heats the incoming air, which then rises due to the exhaust fan 170. Along the way, it heats and dries the veneer wood. Finally, the hot air impacts the upper inner wall of the furnace frame 100 and flows to both sides, then towards the inner walls of the furnace frame 100. The hot air comes into contact with the side plates of the guide plate 150, changing its trajectory and flowing downwards towards the side closer to the veneer wood. Due to the obstruction of the baffle plate 160, some of the hot air... The trajectory of the hot air is changed again, and it can be blown into the adjacent veneer space from the side of the veneer wood. It can blow hot air into the gap between the veneer wood and the clamping parts, eliminate the blind spots in the heating and drying of the veneer wood, and extend the heating time of the veneer wood, so that the veneer wood is fully heated and dried. Another part of the air will flow through the air channel 161 to the lower baffle 160, which can eliminate the blind spots of the veneer wood from multiple layers of height, thereby improving the drying quality of the veneer wood. Finally, the air will flow down and re-enter the electric heating chamber 140 for secondary heating, and the veneer wood can be dried again by the exhaust fan 170.

[0040] When hot air flows towards the upper inner wall of the furnace frame 100, some of the air will be discharged to the outside through the dehumidification component 130, thereby expelling the moisture generated during the drying of veneer wood. The moisture in the air will adhere to the inner wall of the outer conical ring 133 and the cylinder 132 due to the upward flow. The moisture will eventually condense into water droplets, which will flow along the upper and lower inclined surfaces of the outer conical ring 133 to the inner wall of the cylinder 132, eventually converging into water and entering the guide cavity 134 through the drain hole 135. In the guide cavity 134, the water will flow downward into the temporary storage ring groove 136 and be discharged into the designated collection cylinder through the drainage pipe 131. This can prevent the moisture from condensing into water droplets in the cylinder 132 and dripping down onto the veneer wood, preventing secondary wetting of the veneer wood and further improving the quality of veneer wood drying.

[0041] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, but such modifications, substitutions, and variations are protected by patent law as long as they fall within the scope of the claims of the present invention.

Claims

1. A tunnel kiln for drying of single board wood, comprising a furnace frame (100), characterized in that: Four sets of positioning frames (110) are fixed longitudinally inside the furnace frame (100). Air inlet frames (120) are installed on the left and right sides of the furnace frame (100). An electric heating chamber (140) for heating air is provided on the inner wall of the furnace frame (100) corresponding to the position of the air inlet frame (120). An exhaust fan (170) is installed between the four sets of positioning frames (110). A drive shaft positioning plate (180) is fixed above the exhaust fan (170) between the two sets of positioning frames (110). A dehumidification component (130) is installed on the top of the furnace frame (100). A guide plate (150) is fixed on the left and right inner walls of the furnace frame (100) near the top. Two sets of baffles (160) are welded on the side of the guide plate (150) near the positioning frame (110) in an inclined manner. An air passage groove (161) is opened at the contact position between the baffles (160) and the guide plate (150).

2. A tunnel kiln for drying single board wood according to claim 1, characterized in that: The outer walls of the four positioning frames (110) are bolted to a crossbeam (111), and the exhaust fan (170) is screwed into the inside of the crossbeam (111).

3. A tunnel kiln for drying of single board wood according to claim 1, characterized in that: The air inlet frame (120) is equipped with a staggered desiccant. The air inlet frame (120) is fixed to the outer wall of the furnace frame (100) with screws. The outer wall of the furnace frame (100) is provided with an air inlet at the corresponding position of the air inlet frame (120).

4. A tunnel kiln for drying of single board wood according to claim 1, characterized in that: The front and rear surfaces of the furnace frame (100) are fixed with side baffles (101), and the side baffles (101) are fixed to the upper inner wall of the furnace frame (100).

5. A tunnel kiln for drying single board wood according to claim 1, characterized in that: The dehumidification assembly (130) includes a cylinder (132) fixed at the center of the top of the furnace frame (100). The top of the furnace frame (100) is provided with a dehumidification hole that communicates with the bottom of the cylinder (132). Multiple sets of outer conical rings (133) are fixed on the curved inner wall of the cylinder (132). A temporary storage ring groove (136) is provided on the lower inner wall of the cylinder (132). A guide cavity (134) communicating with the temporary storage ring groove (136) is reserved in the cylinder (132). Multiple sets of drainage holes (135) are provided on the curved inner wall of the cylinder (132) at the top of each set of outer conical rings (133).

6. A tunnel drying chamber for drying veneer wood according to claim 5, characterized in that: Multiple sets of the outer conical rings (133) are distributed at equal intervals along the longitudinal axis of the cylinder (132), and the diameter of the holes in the middle of the multiple sets of outer conical rings (133) decreases from bottom to top.

7. A tunnel kiln for drying of single board wood according to claim 1, characterized in that: Multiple sets of baffles (190) are fixed between the two sets of positioning frames (110). The multiple sets of baffles (190) are arranged in a row below the drive shaft positioning plate (180). The drive shaft positioning plate (180), baffles (190) and guide plates (150) form a longitudinal downward discharge channel.

Images