Cooling device of hot pressboard

Abstract

The utility model discloses a cooling device of a hot pressboard. The cooling device comprises a multi-layer frame, an air supply mechanism and a flow guide assembly. The multi-layer frame is three-dimensionally supported by vertical columns and transverse beams, and each layer is provided with a bearing surface for placing a hot-pressed wood plate. The air supply mechanism comprises a centrifugal fan unit which supplies air in parallel and evenly covers all layers for heat dissipation. The flow guide assembly comprises a main air guide plate and an outer air guide plate. The main air guide plate inclines to form a flaring type first air duct to guide main airflow to the front end of the frame; the outer air guide plate wraps the main air guide plate, the inner wall of the outer air guide plate and the main air guide plate form an annular second air channel, and the tail end of the outer air guide plate is bent to form an airflow bending part to guide airflow and diffusion turbulence of the first air channel to areas on the two sides of the frame. According to the cooling device, through the collaborative design of the multi-layer frame structure and the composite flow guide assembly, the flaring type first air channel and the annular second air channel are formed through the main air guide plate and the outer air guide plate, direct covering of main air flow on the front end area of the frame and tangential guiding-in of the side edge area are achieved, and traditional cooling blind areas are effectively eliminated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wood product production, and more particularly, to a cooling device for hot-pressed board. BACKGROUND

[0002] Traditional hot-pressed board cooling is mostly single-layer air cooling or natural heat dissipation, which has problems such as low efficiency, uneven air flow distribution, and is prone to cause wood board deformation or residual internal stress. In the prior art, the multi-layer cooling frame lacks flow guide optimization, is prone to air flow blind area, and the centrifugal fan and air supply mechanism are not matched, the turbulent diffusion is significant, and the heat dissipation uniformity is poor. The present application aims at the above-mentioned defects, and realizes efficient and uniform heat dissipation through the design of composite flow guide assembly and differential air supply, thereby improving the cooling quality and production efficiency of the wood board. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a cooling device for hot-pressed board, which comprises a frame structure, an air supply mechanism and a flow guide assembly. The frame structure is multi-layered and composed of a plurality of parallel arranged support layers, each layer is provided with a horizontal bearing surface for bearing the wood board just completed hot pressing, and the frame structure comprises a three-dimensional support system composed of a plurality of vertical columns and transverse connecting beams. The air supply mechanism is axial flow type and integrated at the front end of the frame structure, and the air supply mechanism comprises an array of centrifugal fan groups, the air supply direction of which is parallel to the wood board bearing plane, and is used for uniformly supplying air to each layer of bearing surface for heat dissipation. The flow guide assembly is composite type and comprises a main air guide plate and an outer air guide plate. The main air guide plate is fixed at the front end of the frame structure, and the inclined flow guide surface of the main air guide plate forms an expanded first air duct with the air outlet of the air supply mechanism, and guides the main air flow to the front end area of the frame structure. The outer air guide plate is wrapped outside the main air guide plate, and the inner curved surface of the outer air guide plate and the outer wall of the main air guide plate form a ring-shaped second air duct, and the end of the outer air guide plate is extended to form a air flow turning part bent towards the frame structure, which guides the air flow to the side plate area of the frame structure, and the outer air guide plate is also used for guiding the diffusion turbulent flow diffused through the first air duct to the side edge area of the frame structure.

[0004] In some embodiments, the air flow area ratio of the first air duct and the second air duct is 2:1.

[0005] In some embodiments, the inclination angle of the main air guide plate relative to the air supply air flow is greater than or equal to 30° and less than or equal to 45°, the inclination angle of the outer air guide plate relative to the air supply air flow is greater than or equal to 30° and less than or equal to 50°, and the inclination angle of the main air guide plate is greater than or equal to the inclination angle of the outer air guide plate.

[0006] In some embodiments, the outer air guide plate is bent so that the second air duct air flow is tangentially introduced into the frame structure at a length of 50%-75% from the front end surface of the frame structure.

[0007] In some embodiments, the air supply mechanism comprises a support and two fans mounted on the support, the two fans being distributed along a vertical direction.

[0008] In some embodiments, the air supply mechanism further comprises a filter plate arranged upstream of the air inlet channel, the filter plate being made of a porous metal plate with a pore size of 0.5-1.2 mm, for trapping wood chips and fibrous materials with a particle size >50 μm.

[0009] In some embodiments, the two fans are controlled in differential mode, the upper fan rotating at 1.2-1.5 times the speed of the lower fan, forming staggered airflows to eliminate blind areas between layers.

[0010] In some embodiments, the distance between the frame structure layers is 6-10 cm, and the thickness of the wood board is less than or equal to 4 cm.

[0011] The cooling device of the present application utilizes the cooperation of the multi-layer frame structure and the composite flow guide assembly, utilizes the main guide plate and the outer guide plate to form the flared first air duct and the annular second air duct, realizes the direct coverage of the main airflow to the front end region of the frame and the tangential introduction to the side edge region, effectively eliminates the traditional cooling blind area; in cooperation with the parallel air supply layout of the axial flow air supply mechanism, ensures uniform heat dissipation of each layer of bearing surface, and significantly improves the cooling efficiency and airflow distribution uniformity of the hot press plate.

[0012] Additional aspects and advantages of the embodiments of the present application will be in part apparent and in part pointed out hereinafter in the description of the embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0013] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the description of the embodiments, taken in conjunction with the following drawings in which:

[0014] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application;

[0015] Figure 2 is Figure 1 is a top view of the overall structure in

[0016] Main element symbol explanation: cooling device 100, frame structure 10, stand column 11, connecting beam 12, air supply mechanism 20, centrifugal fan set 21, fan 211, support 22, filter plate 23, flow guide assembly 30, main guide plate 31, first air duct 311, outer guide plate 32, second air duct 321, airflow turning part 322, connecting rod 33, fixing rod 34. DETAILED DESCRIPTION

[0017] The embodiments of the present application will be further described with reference to the drawings. Like or similar elements in the drawings are denoted by the same or similar reference numerals.

[0018] In addition, the embodiments of the present application described below with reference to the drawings are exemplary only, and are not intended to limit the present application.

[0019] In the present application, unless specifically defined otherwise and limited, a first feature is "on" or "under" a second feature can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "over", "above" and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. The first feature "under", "below" and "underneath" the second feature can mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0020] Please refer to Figure 1 and Figure 2 , a cooling device 100 of a hot-pressed board of the present application, comprising a frame structure 10, a air supply mechanism 20 and a flow guide assembly 30. The frame structure 10 is multi-layered, composed of several parallel support layers, each layer is provided with a horizontal bearing surface for bearing the just hot-pressed board, and the frame structure 10 includes a three-dimensional support system composed of a plurality of vertical columns 11 and transverse connecting beams 12. The air supply mechanism 20 is an axial flow type, integrated at the front end of the frame structure 10, and the air supply mechanism 20 includes an array of centrifugal fan groups 21, which are parallel to the board bearing plane for uniform air supply and heat dissipation to each layer of bearing surface. The flow guide assembly 30 is a composite type, including a main guide plate 31 and an outer guide plate 32. The main guide plate 31 is fixed to the front end of the frame structure 10, and the inclined flow surface of the main guide plate 31 forms an expanded first air duct 311 with the air outlet of the air supply mechanism 20, guiding the main airflow to the front end area of the frame structure 10. The outer guide plate 32 is wrapped on the outside of the main guide plate 31, and the inner curved surface of the outer guide plate 32 and the outer wall of the main guide plate 31 form a ring-shaped second air duct 321, and the end of the outer guide plate extends to form a airflow deflection part 322 bent towards the frame structure 10, guiding the airflow to the side plate area of the frame structure 10, and the outer guide plate is also used to guide the diffusion turbulence diffused through the first air duct 311 to the side edge area of the frame structure 10.

[0021] The cooling device 100 of the present application cooperates with the composite flow guide assembly 30 through the multi-layer frame structure 10, uses the main air deflector 31 and the outer air deflector 32 to form the flared first air duct 311 and the annular second air duct 321, realizes the direct coverage of the main airflow to the front end area of the frame and the tangential introduction to the side area, effectively eliminates the traditional cooling blind area, and cooperates with the parallel air supply layout of the axial flow air supply mechanism 20 to ensure the uniform heat dissipation of each layer of the bearing surface, significantly improves the cooling efficiency of the hot press and the airflow distribution uniformity.

[0022] Please refer to Figure 1 After the wood board is hot-pressed and formed, it needs to be placed in the frame structure 10 for air cooling to quickly cool down. The frame structure 10 of the present application forms a rectangular three-dimensional support through the vertical column 11 and the transverse beam, which is suitable for synchronous cooling of multiple layers of wood boards. Further, the distance between the layers of the frame structure 10 is [6, 10] centimeters, and the thickness of the wood board is less than or equal to 4 centimeters. The layer spacing is about 1.5-2.5 times the thickness of the wood board, which ensures that the airflow fully surrounds the surface of the board, avoids interference between adjacent layers of airflow, and improves the cooling efficiency and space utilization.

[0023] The air supply mechanism 20 is used to uniformly supply air to each layer of the bearing surface for heat dissipation. The air supply mechanism 20 includes a centrifugal fan set 21 and a bracket 22. The centrifugal fan set 21 includes two centrifugal fans 211, and the two fans 211 are installed on the bracket 22 in a vertically distributed array design. The vertically distributed double fans 211 can independently control the airflow speed of the upper and lower layers (such as a higher airflow speed in the upper layer), adapt to the cooling needs of boards of different thicknesses, and avoid temperature differences between layers.

[0024] Further, the two fans 211 adopt a differential speed control mode, the upper fan 211 rotates at 1.2-1.5 times the speed of the lower fan 211, forming staggered airflow to eliminate the airflow blind area between layers. The high-speed airflow in the upper layer compensates for the heat dissipation needs of thick areas of the hot press, and the low-speed airflow in the lower layer reduces the risk of overcooling in thin areas, eliminates the blind area between layers, and reduces the temperature difference by more than 15%.

[0025] Further, the air supply mechanism 20 also includes a filter plate 23 arranged upstream of the air inlet channel. The filter plate 23 is made of a porous metal plate with a pore size of 0.5mm-1.2mm, which is used to trap wood chips and fibers with a particle size of >50μm. The porous metal filter plate 23 is arranged upstream of the air inlet channel (i.e. at the air inlet of the fan 211), which intercepts chips and fibers above 50μm to avoid clogging the air duct. At the same time, the metal filter plate 23 adopts an easy-to-dismount structure design, which is convenient for cleaning.

[0026] Please refer to Figure 1 and Figure 2The air guide assembly 30 is used to guide the air flow generated by the air blower 211 to the frame structure 10, and the air guide assembly 30 comprises a main air guide plate 31 and an outer air guide plate 32, the main air guide plate 31 and the outer air guide plate 32 are arranged perpendicular to the horizontal plane, the main air guide plate 31 is inside, and the outer air guide plate 32 is outside to form a composite structure.

[0027] The main air guide plate 31 is designed in a trumpet shape, when the air flow blows on the frame structure 10 and the hot press plate, the turbulent flow is formed to diffuse backward and to the side edges, and the main air guide plate 31 is used to blow the backward turbulent flow to the frame structure 10 again, so as to form a first air duct 311 of the main air flow in combination with the main air flow, which directly covers the front end area of the frame structure 10.

[0028] The outer air guide plate 32 is wrapped around the outer periphery of the main air guide plate 31, the front half thereof is designed in a trumpet shape, and the rear half is bent to guide the air flow to the two side edges of the frame structure 10. The outer air guide plate 32 covers the main air guide plate 31, the inner side wall of the outer air guide plate 32 and the outer side plate of the main air guide plate 31 form a ring-shaped second air duct 321, and the air flow turning part 322 at the end is bent to guide the air flow to the side edges of the frame. The two air guide plates are fixedly connected through the connecting rod 33, and are fixed on the frame structure 10 through the fixing rod 34. The air flow in the second air duct 321 is tangentially introduced into the frame structure 10 at a length of 50%-75% of the frame structure 10 from the front end surface, and the air flow is uniformly introduced along the direction of the wood board through the air flow turning position control, so as to eliminate the cooling blind area at the rear end.

[0029] Further, the air flow area ratio of the first air duct 311 and the second air duct 321 is 2:1, that is, the cross-sectional area ratio of the first air duct 311 and the second air duct 321 at the starting end to the area of the air blower 211 is 2:1. The air flow distribution is controlled by the area ratio of the air ducts, the main air duct concentrates on covering the core heat dissipation area, the secondary air duct compensates the side air flow, reduces the turbulent interference, and improves the heat dissipation efficiency.

[0030] Further, the inclination angle A of the main air guide plate 31 relative to the air flow is [30°, 45°], the inclination angle B of the outer air guide plate 32 relative to the air flow is [30°, 50°], and the inclination angle of the main air guide plate 31 is greater than or equal to the inclination angle of the outer air guide plate 32. The main air flow is preferentially diffused to the front end of the frame, the angle of the outer air guide plate 32 is adapted to the tangential introduction of the side air flow, the air flow is prevented from decaying too early, and the side heat dissipation intensity is improved by 25%.

[0031] Further, the outer air deflector 32 is bent so that the second air duct 321 air flow is tangentially introduced into the frame structure 10 at a side edge of the frame structure 10 at a distance of 50%-75% of the total length L1 from the front end face 10, i.e. the position of the cut-in point is at a distance L2=(50%-75%)*L1 from the front end L1. The side edge air flow introduction path is optimized, the rear end cooling blind area is eliminated, especially the blind area at the rear end corner of the hot press plate, and the side edge and corner heat dissipation uniformity is improved by about 20%.

[0032] In the description of the present specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the described embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0033] In addition, the terms "first", "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, unless otherwise specifically limited.

[0034] Although the embodiments of the present application have been shown and described above, it can be understood that the above-described embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A cooling device for hot-pressing plates, characterized in that, The application relates to a multi-layer frame structure, which is composed of a plurality of parallel support layers, each layer being provided with a horizontal bearing surface for bearing wood plates just finished with hot pressing, and the frame structure comprises a three-dimensional support system composed of a plurality of vertical columns and transverse connecting beams. The frame structure is provided with an axial-flow air supply mechanism at the front end, which comprises an array of centrifugal fans and is arranged in parallel with the wood plate bearing surface to uniformly supply air to the bearing surface. The frame structure is provided with a composite air guide assembly, which comprises a main air guide plate and an outer air guide plate. The main air guide plate is fixed at the front end of the frame structure, and the inclined air guide surface of the main air guide plate forms an expanded first air duct with the air outlet of the air supply mechanism to guide the main airflow to the front end area of the frame structure. The outer air guide plate is wrapped outside the main air guide plate, and the inner curved surface of the outer air guide plate and the outer wall of the main air guide plate form a ring-shaped second air duct. The air flow area ratio of the first air duct to the second air duct is 2:

1.

2. Cooling device according to claim 1, characterized in that The inclination angle of the main air guide plate relative to the air supply airflow is greater than or equal to 30 DEG and less than or equal to 45 DEG, the inclination angle of the outer air guide plate relative to the air supply airflow is greater than or equal to 30 DEG and less than or equal to 50 DEG, and the inclination angle of the main air guide plate is greater than or equal to the inclination angle of the outer air guide plate.

3. The cooling device of claim 1, wherein The outer air guide plate is bent so that the airflow in the second air duct is tangentially introduced into the frame structure at a length of 50%-75% of the distance from the side edge of the frame structure to the front end surface.

4. The cooling device of claim 1, wherein The air supply mechanism comprises a support and two fans mounted on the support, and the two fans are distributed along the vertical direction.

5. The cooling device of claim 1, wherein The air supply mechanism further comprises a filter plate arranged upstream of the air inlet channel, which is made of a porous metal plate with a pore size of 0.5mm-1.2mm and is used for trapping wood chips and fibers with a particle size greater than 50mu.

6. Cooling device according to claim 5, characterized in that The two fans adopt a differential speed control mode, and the rotation speed of the upper fan is 1.2-1.5 times that of the lower fan to form staggered airflow to eliminate the airflow blind area between layers.

7. Cooling device according to claim 5, characterized in that The distance between the layers of the frame structure is 6-10cm, and the thickness of the wood plate is less than or equal to 4cm.

8. The cooling device of claim 1, wherein, ​

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