Anti-cracking plate decompression drying device

Abstract

The utility model provides an anti-cracking plate decompression drying device which comprises a decompression chamber, a vacuum pump, a cyclic heating mechanism and a plate drying frame, the plate drying frame comprises a bottom plate and plate placing assemblies symmetrically arranged on the bottom plate, and an airflow channel with two wide ends and a narrow middle is formed between the two plate placing assemblies; a plate to be dried is placed on the plate drying frame, after the pressure reduction chamber is closed, the air pressure in the pressure reduction chamber is reduced through the vacuum pump, so that water can be vaporized at a low temperature, the plate in the drying chamber is heated in cooperation with the cyclic heating mechanism, and an airflow channel between the two plate placing assemblies can form a strait tube effect; the flow rate of airflow entering the airflow channel is increased, moisture on the surface of the board can be taken away, a saturated steam boundary layer on the surface of the wood is damaged, and therefore the heat and mass transfer conditions between a medium and the wood are improved, the drying speed is increased, and the drying efficiency of the board is improved.

Description

Technical Field

[0001] The utility model relates to the field of plate processing, in particular to a decompression drying device for crack-proof plates. Background Art

[0002] In order to prevent the board from cracking due to high temperature during the drying process, most of them are dried by vacuum drying. The principle of vacuum drying is that the temperature required for water vaporization will be lowered under reduced pressure. In a closed drying room, the indoor air pressure is reduced by a vacuum pump, so that the water can be vaporized at a lower temperature, thereby accelerating the drying process. At the same time, due to the reduction in air pressure, the diffusion rate of the vaporized water will also increase, which is conducive to the rapid diffusion of water from the inside of the material to the surface and discharge;

[0003] The Chinese utility model patent with announcement number CN203342782U discloses a drying device for preparing aerogel by reduced pressure drying. In this invention, the flow rate control of the airflow in the drying chamber generally depends on the power of the circulating fan. In order to increase the flow rate of the airflow in the drying chamber, it is usually necessary to increase the power of the circulating fan, thereby improving the drying efficiency. In this process, the performance requirements of the fan are high and the energy consumption is relatively large. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In order to solve the above problems in the prior art, the utility model provides a decompression drying device for crack-proof plates.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0008] A crack-proof plate decompression drying device, comprising a decompression chamber, a vacuum pump, a circulating heating mechanism and a plate drying rack;

[0009] The decompression chamber is provided with a decompression liner;

[0010] The vacuum pump is connected to the decompression chamber;

[0011] The circulation heating mechanism is arranged in the decompression chamber to realize hot air circulation inside the decompression chamber;

[0012] The plate drying rack comprises a bottom plate and plate placing components symmetrically arranged on the bottom plate, and an air flow channel with wide ends and narrow middle is formed between two groups of the plate placing components.

[0013] Preferably, the sheet material placement assembly includes two groups of placement racks, one ends of the two groups of placement racks are connected to each other to form an inwardly bent sheet material placement assembly structure.

[0014] Preferably, the placement rack includes two vertical poles, the two vertical poles are arranged at an interval, and a placement groove is opened on the side of the two vertical poles close to each other, and the two ends of the plate are respectively placed in the placement grooves on the two vertical poles.

[0015] Preferably, universal wheels are provided at the four corners of the bottom of the base plate.

[0016] Preferably, a connecting protrusion is provided at one end of the bottom plate, and a connecting groove corresponding to the connecting protrusion is provided at the other end of the bottom plate. When two groups of the plate drying racks are spliced, the connecting protrusion of one group of bottom plates enters into the connecting groove of the other group of bottom plates and is fixed by plugging with a pin.

[0017] Preferably, the circulating heating mechanism comprises an air inlet chamber, an air exhaust chamber, a heating chamber, an electric heating tube and a circulating fan;

[0018] The air inlet cavity and the air exhaust cavity are arranged on two sides of the decompression liner opposite to each other, and are connected to the decompression liner through air holes;

[0019] The heating chamber is arranged at the bottom of the decompression liner, and the air inlet chamber, the air exhaust chamber, the decompression liner and the heating chamber form a circulating air duct;

[0020] The electric heating tube is installed in the heating chamber;

[0021] The circulating fan is installed in the air inlet cavity or the air exhaust cavity.

[0022] (III) Beneficial effects

[0023] The beneficial effect of the utility model is that: by adopting the above technical scheme, the board to be dried is placed on the board drying rack, and after the decompression chamber is closed, the air pressure in the decompression chamber is reduced by a vacuum pump, so that the moisture can be vaporized at a lower temperature, and then the board in the drying chamber is heated in conjunction with the circulating heating mechanism. The air flow channel between the two groups of board placement components can form an isthmus effect, so that the air flow rate entering the air flow channel is increased, which can take away the moisture on the surface of the board and destroy the saturated steam boundary layer on the surface of the wood, thereby improving the heat transfer and mass transfer conditions between the medium and the wood, accelerating the drying speed, and thus improving the drying efficiency of the board. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a decompression drying device for crack-proof plates;

[0025] Figure 2 Schematic diagram of the structure of the plate drying rack Figure 1 ;

[0026] Figure 3 Schematic diagram of the structure of the plate drying rack Figure 2 ;

[0027] Figure 4 It is a schematic diagram of the top view of the structure of the plate drying rack;

[0028] Figure 5 Schematic diagram of the splicing structure of the plate drying rack

[0029] Description of reference numerals:

[0030] 1. Decompression chamber;

[0031] 2. Vacuum pump;

[0032] 3. Decompression liner;

[0033] 4. Plate drying rack;

[0034] 41. bottom plate; 42. plate placement assembly; 421. vertical pole; 43. connecting protrusion; 44. connecting groove;

[0035] 5. Circulation heating mechanism;

[0036] 51. Air inlet chamber; 52. Heating chamber; 53. Exhaust chamber; 54. Electric heating tube; 55. Circulating fan. DETAILED DESCRIPTION

[0037] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0038] Please refer to Figures 1 to 4 The utility model provides a decompression drying device for crack-proof plates, comprising a decompression chamber 1, a vacuum pump 2, a circulating heating mechanism 5 and a plate drying rack 4;

[0039] The decompression chamber 1 is provided with a decompression liner 3;

[0040] The vacuum pump 2 is connected to the decompression chamber 1;

[0041] The circulation heating mechanism 5 is arranged in the decompression chamber 1 to realize the hot air circulation inside the decompression chamber 1;

[0042] The plate drying rack 4 includes a bottom plate 41 and plate placing components 42 symmetrically arranged on the bottom plate 41, and an air flow channel with wide ends and narrow middle is formed between two groups of the plate placing components 42;

[0043] When in use, the board to be dried is placed on the board drying rack 4. After the decompression chamber 1 is closed, the air pressure in the decompression chamber 1 is reduced by the vacuum pump 2, so that the moisture can be vaporized at a lower temperature, and then the circulating heating mechanism 5 is used to heat the board in the drying chamber. The air flow channel between the two groups of board placement components 42 can form an isthmus effect, which increases the air flow rate entering the air flow channel, can take away the moisture on the surface of the board, and destroy the saturated steam boundary layer on the wood surface, thereby improving the heat and mass transfer conditions between the medium and the wood, accelerating the drying speed, and thus improving the drying efficiency of the board.

[0044] In this embodiment, the plate placing assembly 42 includes two groups of placing racks, one end of the two groups of placing racks are connected to each other to form an inwardly bent plate placing assembly 42 structure.

[0045] In this embodiment, the placing rack includes two vertical poles 421, the two vertical poles 421 are arranged at an interval, and a placing groove is opened on the side where the two vertical poles 421 are close to each other. The two ends of the plate are respectively placed in the placing grooves on the two vertical poles 421, so that the surface of the plate placed in the placing rack can face the air flow channel, thereby improving the drying efficiency.

[0046] In this embodiment, universal wheels are arranged at the four corners of the bottom of the bottom plate 41 .

[0047] refer to Figure 5 In this embodiment, a connecting protrusion 43 is provided at one end of the bottom plate 41, and a connecting groove 44 corresponding to the connecting protrusion 43 is provided at the other end of the bottom plate 41. When two groups of the plate drying racks 4 are spliced, the connecting protrusion 43 of one group of the bottom plates 41 enters the connecting groove 44 of the other group of the bottom plates 41 and is fixed by plugging with a pin, and then the connecting protrusion 43 and then the connecting groove 44 cooperate to realize the combination of multiple groups of plate drying racks 4.

[0048] In this embodiment, the circulating heating mechanism 5 includes an air inlet chamber 51, an air exhaust chamber 53, a heating chamber 52, an electric heating tube 54 and a circulating fan 55;

[0049] The air inlet chamber 51 and the air exhaust chamber 53 are arranged on two sides of the decompression liner 3 and communicate with the decompression liner 3 through air holes.

[0050] The heating chamber 52 is arranged at the bottom of the decompression liner 3, and the air inlet chamber 51, the air exhaust chamber 53, the decompression liner 3 and the heating chamber 52 form a circulating air duct;

[0051] The electric heating tube 54 is installed in the heating chamber 52;

[0052] The circulating fan 55 is installed in the air inlet chamber 51 or the air exhaust chamber 53;

[0053] When in use, the circulating fan 55 can drive the airflow to circulate in the circulating air duct and heat it through the electric heating tube 54, so that the plate is dried by the heated airflow.

[0054] The working principle of the utility model is as follows:

[0055] The board to be dried is placed on the board drying rack 4, and after closing the decompression chamber 1, the air pressure in the decompression chamber 1 is reduced by the vacuum pump 2, so that the moisture can be vaporized at a lower temperature, and then the circulating heating mechanism 5 is used to heat the board in the drying chamber. The air flow channel between the two groups of board placement components 42 can form an isthmus effect, which increases the air flow rate entering the air flow channel, can take away the moisture on the surface of the board, and destroy the saturated steam boundary layer on the surface of the wood, thereby improving the heat and mass transfer conditions between the medium and the wood, accelerating the drying speed, and thus improving the drying efficiency of the board.

[0056] The circuits, electronic components and modules involved are all prior art and can be fully implemented by those skilled in the art. Needless to say, the content protected by this utility model does not involve improvements to software and methods.

[0057] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

[0058] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A device for drying crack-proof plates under reduced pressure, characterized in that: It includes a decompression chamber, a vacuum pump, a circulating heating mechanism and a plate drying rack; The decompression chamber is provided with a decompression liner; The vacuum pump is connected to the decompression chamber; The circulation heating mechanism is arranged in the decompression chamber to realize hot air circulation inside the decompression chamber; The plate drying rack comprises a bottom plate and plate placing components symmetrically arranged on the bottom plate, and an air flow channel with wide ends and narrow middle is formed between two groups of the plate placing components.

2. The device for drying crack-proof plates under reduced pressure according to claim 1, characterized in that: The plate placing assembly comprises two groups of placing racks, one ends of the two groups of placing racks are connected to each other to form an inwardly bent plate placing assembly structure.

3. The device for drying crack-proof plates under reduced pressure according to claim 2, characterized in that: The placing rack comprises two vertical poles, which are arranged at intervals, and a placing groove is provided on one side of the two vertical poles close to each other, and the two ends of the plate are respectively placed in the placing grooves on the two vertical poles.

4. The device for drying crack-proof plates under reduced pressure according to claim 1, characterized in that: Universal wheels are arranged at the four corners of the bottom of the base plate.

5. The device for drying crack-proof plates under reduced pressure according to claim 1, characterized in that: A connecting protrusion is arranged at one end of the bottom plate, and a connecting groove corresponding to the connecting protrusion is arranged at the other end of the bottom plate. When two groups of the plate drying racks are spliced, the connecting protrusion of one group of bottom plates enters into the connecting groove of the other group of bottom plates and is fixed by plugging with a pin.

6. The device for drying crack-proof plates under reduced pressure according to claim 1, characterized in that: The circulating heating mechanism comprises an air inlet chamber, an air exhaust chamber, a heating chamber, an electric heating tube and a circulating fan; The air inlet cavity and the air exhaust cavity are arranged on two sides of the decompression liner opposite to each other, and are connected to the decompression liner through air holes; The heating chamber is arranged at the bottom of the decompression liner, and the air inlet chamber, the air exhaust chamber, the decompression liner and the heating chamber form a circulating air duct; The electric heating tube is installed in the heating chamber; The circulating fan is installed in the air inlet cavity or the air exhaust cavity.

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