A forced quenching device for compacted wood

Abstract

The application discloses a forced quenching device for compact wood, which comprises a quenching shell body provided with a tunnel type quenching channel; a horizontal transmission device is arranged below the quenching channel in the quenching shell body; a spraying device and a blowing device are arranged above the quenching channel; the spraying device comprises a plurality of spraying assemblies which are uniformly and spacedly arranged in the channel; each spraying assembly comprises a plurality of spraying pipes arranged in a radial direction and a plurality of spraying nozzles which are uniformly and spacedly arranged below the spraying pipes; each spraying pipe is connected to a liquid storage tank arranged at the side of the quenching shell body through a conveying pipeline, a liquid pumping device and a pressure pump; and the blowing device comprises 1-3 blowing fans which are radially distributed between adjacent spraying assemblies. The device improves the heat exchange efficiency of the compact wood and the quenching agent, shortens the freezing time, reduces the processing cost, and improves the strength and hardness of the compact wood through the quenching process.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of wood board processing, and particularly relates to a forced quenching device for densified wood. BACKGROUND

[0002] Densified wood is a kind of reinforced material with hard texture, large density and high strength, which is made of wood board through hot pressing treatment. After compression and densification, the organization structure and physical and mechanical properties of the wood board have changed significantly, i.e. the mechanical strength is enhanced, the deformation of the wood board is reduced, the wear resistance and durability are good, thereby effectively improving the performance of the wood board and increasing the utilization value of the wood board.

[0003] In the existing densified wood processing technology, the following specific steps are performed on the wood board: pretreatment, layering treatment, heating and pressing treatment, solidification treatment, cooling treatment and aging treatment; the cooling treatment is mostly performed in the water cooling and / or air cooling mode. For example, the patent with the patent application number CN202020196506.5 discloses a water cooling device for preliminary cooling of the compressed wood, and then an air cooling device for secondary cooling of the wood. In this process, the cooling time needs to be shortened as much as possible, and the effective improvement (increase) of the strength and hardness of the densified wood is obtained through the sudden reduction and rapid cooling (quenching) of the temperature, while the internal stress is reduced and the brittleness is decreased, thereby improving the mechanical properties of the densified wood. However, the existing air cooling and water cooling processes need to lengthen the laying line of the water cooling equipment and the air cooling equipment, or increase the residence time of the wood in a unit volume to achieve cooling; the heat exchange efficiency of this kind of water cooling and air cooling is low, and the cooling time is too long, which results in that the densified wood cannot exhibit excellent mechanical properties.

[0004] The applicant mentioned in the same type of patent that the rapid quenching is realized by using a refrigerant (such as liquid nitrogen), but there is no related equipment for quenching cooling on the densified wood production line in the existing technology, and how to realize the rapid quenching of the compressed wood on the assembly line is particularly crucial to the product itself. At the same time, in order to save the cost of equipment laying and space occupation, how to shorten the process line laying while improving the quenching efficiency of the compressed wood board on the assembly line is also an urgent technical problem to be solved.

[0005] In addition, the thickness of the densified wood after high-frequency treatment is relatively thick, generally more than 3 cm, and in the actual quenching operation process, the quenching time is too short to reduce the inner center temperature of the densified wood to the preset temperature; in order to solve this technical problem, it is necessary to increase the quenching time of the densified wood in the quenching device, and the increase of the quenching time will affect the processing efficiency of the wood board. SUMMARY

[0006] In order to solve the above technical problems, the present application provides a forced quenching device for densified wood, which can improve the quenching and freezing efficiency of the compressed wood board on the production line.

[0007] The specific technical scheme of the present application is as follows:

[0008] The present application provides a kind of forced quenching device of compact wood, it is used to spray cooling liquid for the cooling of compact wood in progress, the device includes the quenching shell being equipped with tunnel type quenching passage;Quenching passage in the quenching shell below is equipped with horizontal transmission device, quenching passage top is equipped with spray device and air blowing device;

[0009] The spray device includes a plurality of spray assemblies that are uniformly spaced in the top of the quenching passage, each of the spray assemblies includes a plurality of spray pipes arranged radially and a plurality of spray nozzles uniformly spaced below the spray pipes, each of the spray pipes is connected to a liquid storage tank arranged at the side of the quenching shell through a conveying pipe, a liquid suction pump and a pressure pump, and the air blowing device includes 1-3 air blowers radially distributed between adjacent spray assemblies.

[0010] An improved technical solution, each of the spray assemblies includes two radially arranged spray pipes, and 6-12 spray nozzles are arranged below each of the spray pipes, and the distance from the spray nozzles to the transmission surface of the transmission device is 25-40 cm.

[0011] The improvement of the second aspect of the present application, the transmission device includes a transmission web belt arranged below the quenching passage, a roller assembly driving the transmission web belt to move, and a driving mechanism providing power for the roller assembly, both sides of the quenching passage are provided with circulating chutes in the same vertical plane, both sides of the transmission web belt are provided with sliding blocks matched with the circulating chutes, and the transmission web belt is formed by a plurality of axial support rods and a web structure formed by warp knitting and / or weft knitting.

[0012] An improved technical solution, the support rods and the web of the transmission web belt are made of low-temperature metal materials, and the web structure is a three-dimensional structure formed by weaving low-temperature metal wires with a thickness of 0.5-3 cm.

[0013] The roller assembly includes two rollers arranged at both ends of the quenching passage, the front end and the rear end of the transmission web belt form a ring body around the rollers, and the driving mechanism provides rotary power for at least one of the rollers.

[0014] The improvement of the third aspect of the present application, the top of the front end and the rear end of the quenching shell is provided with a sealing plate, and an inlet and outlet is formed between the sealing plate and the transmission surface of the transmission device, the sealing plate is provided with a height-adjustable baffle, and the inner side of the baffle is provided with a wind deflector extending towards the transmission surface of the transmission device.

[0015] An improved technical solution, the wind deflector is composed of a plurality of thin plates arranged in parallel, and the sealing plate is inclined inward from top to bottom, so that the baffle attached thereto is arranged synchronously inclined.

[0016] Yet another improved technical solution, the baffle plate is provided with a plurality of longitudinal adjustment through hole, the baffle plate is fixed through the locking screw inserted into the sealing plate from the outside of the longitudinal adjustment through hole;

[0017] Alternatively, the baffle plate is connected to the sealing plate through an automatic telescopic mechanism.

[0018] An improved technical solution, the bottom of the sealing plate is provided with a position sensor and a distance sensor;The two side shell walls of the quenching shell are provided with observation doors distributed along the axial direction, and the inner side frames of the observation doors are provided with sealing rubber rings.

[0019] The fourth aspect of the improvement of the application, the transmission net belt is divided into several transmission units, and a vertical cooling part is arranged between adjacent transmission units;

[0020] The vertical cooling part includes a longitudinally distributed support roller group arranged at the front end and the rear end of the tunnel, an annular conveying track arranged around the side of the support roller, a plurality of supporting mechanisms arranged between the two annular conveying tracks, and a driving mechanism for driving the rotation of the support roller group;When the supporting mechanism is turned to the transmission unit at the front end or the rear end, the supporting plate provided on the supporting mechanism is connected to the corresponding end of the transmission net belt, and a pushing mechanism is arranged on the side of the supporting mechanism corresponding to the front end of the tunnel to push the compressed wood on the supporting plate;A first spraying horizontal pipe is arranged in the middle between the two annular conveying tracks, and the first spraying horizontal pipe is provided with a plurality of spraying nozzles facing the top side.

[0021] An improved technical solution, the support roller group is arranged in a plurality of independent roller bodies on the two sides, each side includes a front upper roller and a front lower roller arranged at the front end, a rear upper roller and a rear lower roller arranged at the rear end, an upper middle roller arranged above the middle part of the front upper roller and the rear upper roller, and a lower middle roller arranged below the middle part of the front lower roller and the rear lower roller, the lower middle rollers on the two sides are connected by the same roller shaft, and at least one of the lower middle rollers is connected to the driving mechanism;The inner sides of the annular conveying tracks on the two sides are uniformly distributed with opposite connecting rods, the connecting rods extend towards the inner side, and the extending end extends out of the inner side of the corresponding side roller body, the inner end of the connecting rod is rotatably sleeved with a rotating ring, and the rotating rings on the two sides are connected by the supporting plate;

[0022] The spraying nozzles of a plurality of the first spraying horizontal pipes are arranged towards the front side, the rear side and the top side, and a second spraying horizontal pipe is arranged above the middle part of the annular conveying track.

[0023] The forced quenching device for compressed wood of the application adopts a tunnel type quenching channel to quench and freeze the compressed wood after hot pressing, improves the heat exchange efficiency and shortens the freezing time, improves the strength and hardness of the compressed wood through the quenching process, reduces the internal stress and brittleness, and improves the mechanical properties of the compressed wood.

[0024] The forced quenching device for compressed wood adopts a three-dimensional transmission net body to make each surface of the compressed wood board fully contact with the quenching liquid, improve the heat exchange efficiency and shorten the freezing time. In addition, the device increases the longitudinal movement and sufficient liquid nitrogen spraying mode in the tunnel to solve the technical problem of incomplete freezing. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a side view of an embodiment of the forced quenching device for compressed wood;

[0026] Figure 2 It is a side view of an embodiment of the forced quenching device for compressed wood; Figure 1 It is another side view of the forced quenching device for compressed wood;

[0027] Figure 3 It is a side view of an embodiment of the forced quenching device for compressed wood; Figure 1 It is a top view of the forced quenching device for compressed wood;

[0028] Figure 4 It is a side view of an embodiment of the forced quenching device for compressed wood; Figure 1 It is a side view of an embodiment of the forced quenching device for compressed wood;

[0029] Figure 5 It is a side view of an embodiment of the forced quenching device for compressed wood;

[0030] Figure 6 It is a side view of an embodiment of the forced quenching device for compressed wood;

[0031] Figure 7 It is a side view of an embodiment of the forced quenching device for compressed wood;

[0032] Figure 8 It is a side view of an embodiment of the forced quenching device for compressed wood;

[0033] Figure 9 It is a side view of an embodiment of the forced quenching device for compressed wood;

[0034] Figure 10 It is a side view of an embodiment of the forced quenching device for compressed wood; DETAILED DESCRIPTION

[0035] The following examples further illustrate the present application, but should not be construed as limiting the application. Modifications or substitutions of the method, steps or conditions of the present application, without departing from the spirit and scope of the present application, are within the scope of the present application.

[0036] The forced quenching device for compressed wood is used for spraying cooling liquid on the wood board blocks running on the pipeline to realize cooling. The device is configured with a tunnel type quenching channel, and the compressed wood after high-frequency compression is once entered into the quenching channel for spraying quenching through a conveyor belt.

[0037] like Figures 1-5 As shown, the compacted wood forced quenching device includes a quenching shell 1 with a tunnel-type quenching channel 2; a horizontally moving conveying device 3 is provided below the quenching channel 2 inside the quenching shell 1, and a spraying device and a blowing device are provided above the quenching channel 2. The front and rear ends of the quenching shell 1 are provided with receiving frames 19, and the front and rear ends of the conveying device 3 extend above the receiving frames 19 at both ends, respectively, for connection with the equipment of the previous and next stages.

[0038] The spraying device includes multiple spraying components evenly spaced at the top of the quenching channel. Each spraying component includes several radially arranged spray pipes 40 and multiple spray nozzles 41 evenly spaced below the spray pipes 40. Each spray pipe 41 is connected to a storage tank 5 located on the side of the quenching shell 1 via a conveying pipe 42, a liquid pump, and a pressure pump. The blowing device includes 1-3 radially distributed blowers 6 located between adjacent spraying components. The blower motor 60 of the blower 6 extends from the top of the quenching shell 1. The storage tank is filled with quenching liquid, such as liquid nitrogen, with a temperature of -190℃ to -200℃. Liquid nitrogen is sprayed from the spray nozzles onto the compacted wooden panel on the conveyor belt surface, where it undergoes heat exchange and vaporizes. The relatively hot surface of the wooden panel after heat exchange prevents the liquid nitrogen from absorbing more heat temporarily, slowing down its vaporization. Therefore, this invention uses a blowing device to blow away the gas and spray the dripping liquid onto the wooden panel surface, thus improving the liquid nitrogen cooling efficiency.

[0039] To more rationally configure the combined use of spray and blowing devices, Figure 5 In the specific example shown, each of the spraying components includes two radially arranged spray pipes 40, and 6-12 spray nozzles 41 are provided below each spray pipe 40; the distance from the spray nozzle 1 to the transmission surface of the transmission device is 25-40cm.

[0040] An example of an improved transmission device, Figure 6 As shown, the conveying device includes a conveyor belt 30 located below the quenching channel 2, a roller assembly that drives the conveyor belt 30 to move, and a driving mechanism. The driving mechanism uses a motor paired with a reducer 35 to stably drive the movement of the conveyor belt. The reducer 35 is located outside the quenching shell corresponding to the motor mounting position. Circulating grooves are provided on both sides of the quenching channel 2 in the same vertical plane. Sliding blocks that cooperate with the circulating grooves are provided on both sides of the conveyor belt 30. The conveyor belt 30 consists of multiple axial support rods 31 and a mesh 32 formed by warp knitting and / or weft knitting on the support rods 31. Figure 7The woven net body 32 is formed by weaving metal strips into a three-dimensional ordered net body structure. Gaseous and liquid nitrogen can enter the inside and below of the transmission net body from the top, so that the wood board bottom surface can be in full contact with the quenching liquid, and the quenching cooling efficiency is further improved. The support rod 31 and the net body 32 of the transmission net belt 30 are made of low-temperature metal materials. When the quenching liquid is liquid nitrogen, austenitic stainless steel or nickel steel material with high nickel content can be used. In the design of the roller assembly, the return type circulation movement of the transmission net belt can be realized. Specifically, the roller assembly includes two rollers 33 arranged at both ends of the quenching channel 2. The front end and the rear end of the transmission net belt 30 form a ring body around the roller 33. The driving mechanism provides rotary power for at least one roller 33.

[0041] In an improved technical solution, Figure 8 As shown in the figure, the front end and the rear end of the quenching tunnel shell are provided with sealing plates 11. The sealing plates 11 and the transmission surface of the transmission device form an inlet and outlet 16. The sealing plates 11 are provided with height-adjustable baffles 12. The inner side of the baffles 12 is provided with wind deflectors 13 extending towards the transmission surface of the transmission device. In order to prevent excessive cold air in the quenching tunnel from overflowing, the sealing plates form a relatively narrow inlet and outlet from top to bottom. The height of the inlet and outlet is adjusted to be equivalent to the height of the wood board through the baffles and wind deflectors, so as to ensure the smooth entry and exit of the wood board while preventing the wall surface from overflowing with cold air.

[0042] The wind deflector 13 is composed of a plurality of parallel thin plates. The thin plates can also be made of low-temperature metal sheet material. Arranging the thin plates into a plurality of parallel thin plates can avoid blocking the entry and exit of the densified wood board. Even high wood boards can still pass through smoothly. The sealing plate 11 is inclined inward from top to bottom, so that the baffles 12 attached thereto are also inclined.

[0043] The baffles can be height-adjustable baffle structures. In a manual adjustment technical solution, a plurality of longitudinal adjustment holes 14 are arranged on the baffles 12. The baffles 12 are fixed by locking screws 15 inserted into the sealing plates from the outside of the longitudinal adjustment holes 14. In another automatic adjustment technical solution, the baffles are connected to the sealing plates by an automatic telescopic mechanism.

[0044] The sealing plate 11 is provided with a position sensor and a distance sensor at the bottom position. The position sensor can detect whether the densified wood board is at a predetermined position. The distance sensor can calculate the thickness of the wood board according to the distance from the wood board, and automatically adjust the height of the baffle according to the thickness of the wood board.

[0045] In one example, the two side walls of the quenching shell 1 are provided with observation doors 7 distributed along the axial direction, and the inner side frame of the observation door 7 is provided with a sealing rubber ring; the observation door can facilitate the observation of the wood board during quenching and cooling and the maintenance of the equipment. The outer side of the quenching shell 1 is provided with an electric control box 70, an operation box 71 and other equipment.

[0046] The length of the quenching shell (i.e. the quenching tunnel) is set according to the actual use, for example, the length of the quenching shell is 10-15 m, the compressed wood at 90-100℃ after high-frequency compaction slowly passes through the quenching tunnel for quenching and cooling, the wood freezing time is 7-8 minutes, but the center part of the wood is not frozen well, and needs to be put into the quenching tunnel again for secondary freezing or the moving speed of the transmission device is adjusted to increase the residence time of the wood board in the quenching tunnel; the former method needs to put the wood into the freezer again manually, which increases the labor cost and affects the processing speed of the production line; the latter also affects the quenching and freezing speed of the production line. A more reasonable method is to lengthen the quenching tunnel to achieve complete freezing of the wood board; however, due to the limitation of the production site, lengthening the equipment undoubtedly increases the land occupation cost, therefore, the present application increases the longitudinal movement and sufficient liquid nitrogen spraying mode in the tunnel to solve the technical problem.

[0047] In a specific example, the transmission mesh belt 30 is divided into several transmission units, and a vertical cooling part is arranged between adjacent transmission units. Figures 9-10 As shown, the vertical cooling part includes a longitudinally distributed support roller group arranged at the front end and the rear end of the tunnel, an annular conveying track 81 arranged around the side of the support roller, a plurality of supporting mechanisms 82 arranged between the two annular conveying tracks 81, and a driving mechanism for driving the rotation of the support roller group; when the supporting mechanism 82 is turned to the transmission unit at the front end or the rear end, the supporting plate 83 arranged on the supporting mechanism 82 is in relative connection with the transmission mesh belt 30 at the corresponding end, and a pushing mechanism 84 for pushing the compressed wood on the supporting plate 83 when the supporting mechanism 82 at the front end of the tunnel is pushed is arranged on the side of the supporting mechanism 82; a first spraying horizontal pipe 85 is arranged in the middle between the two annular conveying tracks 81, and the first spraying horizontal pipe 85 is provided with at least a plurality of spraying nozzles 86 facing the top side. In one improved example, the spraying nozzles 86 of the plurality of first spraying horizontal pipes 85 are arranged to face the front side, the rear side and the top side; a second spraying horizontal pipe 87 is arranged above the middle part of the annular conveying track, and the bottom of the second spraying horizontal pipe 87 is provided with a plurality of spraying nozzles 86. In this technical solution, the quenching and cooling time of the compressed wood is increased by the longitudinal conveying of the transmission mesh belt, and the quenching is more effectively performed by the convection spraying operation of the first spraying horizontal pipe 85 and the second spraying horizontal pipe 87, which shortens the quenching time while ensuring that the compressed wood is completely frozen to the standard. In addition, when the first spraying horizontal pipe and the second spraying horizontal pipe are arranged, in order to avoid the obstruction of the horizontal pipe to the supporting mechanism, the liquid inlet pipe of the horizontal pipe is connected from the outer side of the support roller group.

[0048] According to the above technical solution, in a further specific embodiment, the support roller groups are respectively arranged on the plurality of roller bodies on both sides, each side specifically includes a front upper roller 801 and a front lower roller 802 arranged at the front end of the advancing direction, a rear upper roller 803 and a rear lower roller 804 arranged at the rear end of the advancing direction, an upper middle roller 805 arranged above the middle part of the front upper roller 801 and the rear upper roller 803, and a lower middle roller 806 arranged below the middle part of the front lower roller 802 and the rear lower roller 804, each of the roller bodies on each side is an independent roller body and is fixed to both sides of the quenching channel through a connecting support, wherein the lower middle rollers 806 on both sides are connected through the same roller shaft 807, and at least one of the lower middle rollers 806 is connected to the driving mechanism. The inner sides of the annular conveying tracks 81 on both sides are uniformly distributed with opposite connecting rods 810, the connecting rods 810 extend towards the inner side, and the extending end extends out of the inner side of the corresponding side roller body, the inner side end of the connecting rod 810 is rotatably sleeved with a rotating ring 811, and the rotating rings 811 on both sides are connected through the supporting plate 83. The supporting plate 83 can be a grid plate, a mesh plate or a frame structure, etc. After the supporting plate 83 receives the densified wood from the transmission net body, it moves slowly around the annular conveying track, and during the moving process, the densified wood is sprayed and frozen in all directions through the first and second spraying horizontal pipes; when it rotates to the transmission net body at the front end, the push hand mechanism 84 arranged on the inner side of the corresponding supporting plate 83 at this position pushes the densified wood onto the transmission net body at the front end. The push hand mechanism 84 can adopt the existing axial moving device such as a telescopic oil cylinder structure to realize the pushing of the densified wood.

[0049] The first aspect of the present application adopts a tunnel type quenching channel to quench and freeze the densified wood after hot pressing, improves the heat exchange efficiency and shortens the freezing time, and at the same time improves the strength and hardness of the densified wood through the quenching process, reduces the internal stress and reduces the brittleness, thereby improving the mechanical properties of the densified wood. The improvement of the second aspect adopts a three-dimensional transmission net body to make each surface of the densified wood plate fully contact with the quenching liquid, improve the heat exchange efficiency and shorten the freezing time. The third aspect increases the longitudinal movement and sufficient liquid nitrogen spraying mode in the tunnel to solve the technical problem of incomplete freezing.

[0050] The effect of the equipment of the present application is further tested and explained by the quenching and freezing test of the densified wood plate.

[0051] 1. Select 6 pieces of fixed-size poplar strips (also known as softwood strips) after high-frequency densification under the same process conditions, with a length of 100 cm ± 1 cm and a width of 22 cm ± 0.2 cm, and divide them into two groups, with 3 pieces of wood in each group. The state of the 3 pieces of wood in each group is as follows: the first piece has a thickness of 3 cm and a normal temperature of 35℃; the second piece has a thickness of 2 cm and a hot-pressed temperature of 90-100℃; and the third piece has a thickness of 2.6 cm and a hot-pressed temperature of 90-100℃.

[0052] 2. Quenching process:

[0053] 2.1 The quenching device of the present application with a quenching channel (without vertical cooling part) of 12 m length, the machine temperature setting -130℃; the first group of 3 pieces of wood board into the quenching channel for testing. The experimental results are as follows:

[0054] The first piece: frozen to -3~ -5℃ around the time in 10 minutes or so, the center of the quenched has obvious frost.

[0055] The second piece: frozen 8 minutes, the center part is not frozen, put into the channel again and frozen for 6 minutes, the center temperature is about -3℃, the center has ice cold and frost.

[0056] The third piece: frozen 8 minutes, the center part is not frozen, put into the channel again and frozen for 7 minutes, the center temperature is about -3℃, the center has ice cold and frost.

[0057] 2.2 Set vertical cooling part in the middle of the quenching channel of step 2.1, the vertical height of the track of the vertical cooling part is 2m, and the spray device of convection is also set, and other process conditions are the same as those of step 2.1, the machine temperature setting -130℃; the second group of 3 pieces of wood board into the quenching channel for testing. The experimental results are as follows:

[0058] The first piece: frozen to -3~ -5℃ around the time in 8 minutes or so, the center of the quenched has obvious frost.

[0059] The second piece: frozen 10 minutes or so, the center temperature is about -3℃, the center has ice cold and frost.

[0060] The third piece: frozen 11 minutes or so, the center temperature is about -3℃, the center has ice cold and frost.

[0061] From the experimental results, the freezing time of the second group of samples is significantly less than that of the first group of samples. The possible reason is that the increase of longitudinal movement and sufficient liquid nitrogen spraying mode improves the freezing efficiency.

[0062] The above described embodiments do not constitute a limitation on the protection scope of the technical solutions. Any modifications, equivalent replacements and improvements made within the spirit and principles of the above described embodiments shall be included in the protection scope of the technical solutions.

Claims

1. A device for forced quenching of compacted wood, characterized in that, It is used to spray coolant to cool compacted wood in motion. The device includes a quenching shell with a tunnel-type quenching channel; a horizontally moving conveying device is provided below the quenching channel in the quenching shell, and a spraying device and a blowing device are provided above the quenching channel. The spraying device includes multiple spraying components evenly spaced at the top of the quenching channel. Each spraying component includes several spray pipes arranged radially and multiple spray nozzles evenly spaced below the spray pipes. Each spray pipe is connected to a liquid storage tank located on the side of the quenching shell via a delivery pipe, a liquid pump, and a pressure pump. The blowing device includes 1-3 radially distributed blowers located between adjacent spraying components. The conveying device includes a conveyor belt with a quenching channel below it, a roller assembly that drives the conveyor belt to move, and a drive mechanism that provides power to the roller assembly; the conveyor belt is divided into several conveying units, and a vertical cooling section is provided between adjacent conveying units. The vertical cooling section includes longitudinally distributed support roller groups at the front and rear ends of the tunnel, annular conveyor tracks surrounding the sides of the support rollers, multiple support mechanisms located between the two annular conveyor tracks, and a drive mechanism for rotating the support roller groups. When the support mechanism rotates to the front or rear transmission unit, the support plate of the support mechanism is connected to the corresponding end of the conveyor belt. The support mechanism at the front end of the tunnel is provided with a pusher mechanism for pressing the wood on the support plate during the connection. A first spray pipe is provided in the middle between the two annular conveyor tracks, and the first spray pipe is provided with at least a plurality of spray nozzles facing the top.

2. The forced quenching device for compacted wood as described in claim 1, characterized in that, Each of the spraying components includes two radially arranged spray pipes, and each spray pipe has 6-12 spray nozzles below it; the distance from the spray nozzles to the transmission surface of the transmission device is 25-40cm.

3. The forced quenching device for compacted wood as described in claim 1, characterized in that, The quenching channel has circulating grooves on both sides in the same vertical plane, and the conveyor belt has sliders on both sides that cooperate with the circulating grooves. The conveyor belt consists of multiple axial support rods and a mesh structure formed by warp knitting and / or weft knitting of the support rods.

4. The compacted wood forced quenching device as described in claim 3, characterized in that, The support rods and mesh body of the transmission belt are made of low-temperature metal material; the mesh body structure is a three-dimensional structure with a thickness of 0.5-3cm formed by weaving low-temperature metal fine wires. The roller assembly includes two rollers located at both ends of the quenching channel, the front and rear ends of the conveyor belt surround the rollers to form a ring, and the driving mechanism provides rotational power to at least one of the rollers.

5. The forced quenching device for compacted wood as described in claim 1, characterized in that, The front and rear ends of the quenching tube shell are each provided with a sealing plate, and the sealing plate forms an inlet and outlet with the transmission surface of the transmission device; the sealing plate is provided with a height-adjustable baffle, and the inner side of the baffle is provided with a wind deflector extending toward the transmission surface of the transmission device.

6. The forced quenching device for compacted wood as described in claim 5, characterized in that, The wind deflector is composed of multiple thin sheets arranged in parallel; the sealing plate has an inward tilting structure from top to bottom, causing the baffle plate that is attached to it to be tilted synchronously.

7. The forced quenching device for compacted wood as described in claim 5, characterized in that, The baffle is provided with multiple longitudinal adjustment through holes, and the baffle is fixed by locking screws inserted into the sealing plate from the outside of the longitudinal adjustment through holes; Alternatively, the baffle is connected to the sealing plate via an automatic telescopic mechanism.

8. The compacted wood forced quenching device as described in claim 5, characterized in that, The bottom of the sealing plate is equipped with a position sensor and a distance sensor; the two side walls of the quenched shell are provided with observation doors distributed along the axial direction, and the inner frame of the observation door is provided with a sealing ring.

9. The forced quenching device for compacted wood as described in claim 1, characterized in that, The support roller group consists of multiple independent rollers on both sides. Each side includes a front upper roller and a front lower roller at the front end of the travel, a rear upper roller and a rear lower roller at the rear end of the travel, an upper middle roller located above the front upper roller and the rear upper roller, and a lower middle roller located below the front lower roller and the rear lower roller. The lower middle rollers on both sides are connected by the same roller shaft, and at least one lower middle roller is connected to the drive mechanism. The inner sides of the annular conveyor tracks on both sides are evenly distributed with opposing connecting rods. The connecting rods extend inward, and the extended ends protrude from the inner side of the corresponding side roller. The inner ends of the connecting rods are rotatably sleeved with rotating rings, and the rotating rings on both sides are connected by the support plate. The spray nozzles of the multiple first spray pipes are arranged facing the front, rear and top sides, and a second spray pipe with a spray nozzle at the bottom is provided in the upper middle part of the annular conveyor track.

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