A drying device and method for producing PB boards

Abstract

The present invention provides a drying device and method for PB board production, which relates to the technical field of material drying. The drying device includes a drum and a driving mechanism. A heating sleeve is provided on the outer wall of the drum. A heat-conducting extrusion mechanism is provided inside the drum. The heat-conducting extrusion mechanism includes a mounting shaft fixedly mounted on the inner wall of the drum, an extrusion block and a heat-conducting block slidably mounted on the mounting shaft up and down; the weight of the extrusion block is greater than the weight of the heat-conducting block; racks 1 and 2 are slidably provided on both sides of the mounting shaft, and both racks 1 and 2 are meshed with gears rotatably connected to the mounting shaft, the extrusion block is fixedly connected to rack 1, and the heat-conducting block is fixedly connected to rack 2. The present invention extrude the material through the extrusion block and the heat-conducting block to squeeze out the moisture in the material, which is beneficial to discharge the moisture inside the agglomerated material, thereby facilitating uniform drying of the material and improving drying efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of material drying, and in particular to a drying device and method for producing PB boards. Background Art

[0002] PB boards usually use crushed wood or crushed wood fiber as the main raw materials. After drying, they are mixed with glue, hardener, waterproofing agent, etc. and pressed under a certain temperature and pressure.

[0003] The flue gas high temperature drum dryer is one of the commonly used drying equipment. In this type of dryer, the flue gas does not directly contact the material. Usually, the heat of the flue gas is transferred to the material through the intermediate heat exchange medium (such as metal pipe wall, heat conduction plate, etc.). For example, in some indirect drum dryers, there is a heating pipe inside the drum. The flue gas flows in the pipe and transfers the heat to the drum wall. The material to be dried contacts the drum wall inside the drum, thereby absorbing heat and evaporating the water, which can avoid the contamination of the material by impurities in the flue gas.

[0004] For example, the patent document with the announcement number CN116182538B discloses a drum drying device, which mainly includes a drum, on the inner wall of which a first material conveying mechanism is arranged, and the drum rotates under external drive; a first extension cylinder is fixed inside the drum, and a second material conveying mechanism is arranged on the inner wall of the first extension cylinder; the first material conveying mechanism is used to pick up the material between the drum and the first extension cylinder when the drum rotates and convey the material along the inlet toward the outlet; for materials with more moisture, the transfer device transfers the material moved to the end of the drum to the inside of the first extension cylinder for secondary drying, which increases the distance the material moves, thereby increasing the drying time, which is conducive to uniform drying of the material.

[0005] When drying materials with high moisture content, the above-mentioned drying equipment increases the distance the materials move by adding an extension cylinder, thereby increasing the drying time. However, when drying relatively fluffy materials, the materials are prone to agglomeration after rolling in the drum. Since heat is transferred to the materials through the drum wall, the middle part of the agglomerated materials receives less heat than the edge parts, and the moisture in the middle part of the materials is not easy to be discharged, resulting in uneven drying of the materials. Summary of the invention

[0006] In view of this, the present invention provides a drying device and method for PB board production, which solves the technical problem that when a drum drying device dries fluffy materials, the moisture inside the materials is difficult to be discharged after the materials agglomerate, resulting in uneven drying.

[0007] In order to solve the above technical problems, on the one hand, the present invention provides a drying device for PB board production, comprising a drum, a driving mechanism for driving the drum to rotate, a heating sleeve is arranged on the outer wall of the drum, a heat-conducting extrusion mechanism is arranged inside the drum, and the heat-conducting extrusion mechanism comprises a mounting shaft fixed on the inner wall of the drum, an extrusion block and a heat-conducting block slidably mounted on the mounting shaft up and down; the weight of the extrusion block is greater than the weight of the heat-conducting block, the heat-conducting block is located between the extrusion block and the inner wall of the drum, and the length direction of the mounting shaft extends along the radial direction of the drum;

[0008] Rack one and rack two are slidably provided on the installation shaft, and a gear is also rotatably connected to the installation shaft. The gear is located between rack one and rack two and meshes with rack one and rack two. The extrusion block is fixedly connected to rack one, and the heat conduction block is fixedly connected to rack two.

[0009] By adopting the above technical solution, the heat-conducting extrusion mechanism rotates with the drum. When the heat-conducting extrusion mechanism rotates to the top of the drum, the extrusion block is located below the heat-conducting block. Since the weight of the extrusion block is greater than the weight of the heat-conducting block, the extrusion block moves downward under the action of its own gravity, that is, moves toward the side away from the heat-conducting block. The extrusion block drives the rack to move downward, and then drives the gear to rotate. Since rack one and rack two are respectively located on both sides of the gear, the gear drives rack two to move upward, and then the heat-conducting block moves upward until the heat-conducting block contacts the inner wall of the drum, and the heat of the inner wall of the drum is transferred to the heat-conducting block.

[0010] Due to the effect of gravity, the material is mainly concentrated in the lower part of the drum. As the drum rotates, when the heat-conducting extrusion mechanism rotates to the bottom of the drum, the extrusion block and the heat-conducting block can contact the material. The extrusion block is located above the heat-conducting block. The extrusion block moves downward under the effect of its own gravity, that is, moves toward the side close to the heat-conducting block.

[0011] The extrusion block drives the rack to move down, the rack 1 drives the gear to rotate, and the gear drives the rack 2 to move up, thereby moving the heat conductive block up, reducing the distance between the extrusion block and the heat conductive block, and squeezing the material between the extrusion block and the heat conductive block. At the same time, the heat accumulated in the heat conductive block is transferred to the material, which is beneficial to improving the drying efficiency of the material. The present invention squeezes the material through the extrusion block and the heat conductive block to squeeze out the moisture in the material, which is beneficial to discharge the moisture inside the agglomerated material, thereby facilitating uniform drying of the material and improving the drying efficiency.

[0012] Preferably, the mounting shaft is a hollow structure, and the gear, rack one and rack two are all arranged inside the mounting shaft.

[0013] By adopting the above technical solution, the gear, rack one and rack two are all arranged inside the mounting shaft, reducing the contact between the gear, rack one and rack two and the material, which is conducive to the rack and gear to smoothly complete the transmission between the extrusion block and the heat conduction block.

[0014] Preferably, sliding grooves are provided on both sides of the installation shaft, rack one and rack two are respectively slidably arranged in the sliding grooves, and through holes for allowing the installation shaft to pass through are provided in the middle parts of the extrusion block and the heat conduction block, and a connecting piece that can pass through the sliding groove and be fixedly connected to rack one or rack two is installed on one side of the through hole.

[0015] By adopting the above technical solution, the slide groove provides guidance for the sliding of rack one and rack two, and also enables the guide member to pass through the slide groove and connect with rack one or rack two, so as to facilitate the synchronous movement of the extrusion block and rack one, and the synchronous movement of rack two and heat transfer block two.

[0016] Preferably, the lower surface of the extrusion block and the upper surface of the heat conductive block are both convex, so that the distance between the extrusion block and the edge of the heat conductive block is greater than the distance between the middle parts; the lower surface of the heat conductive block is also convex to increase the contact area with the cylinder wall.

[0017] By adopting the above technical solution, the lower surface of the extrusion block and the upper surface of the heat-conducting block are both convex, so that the distance between the edge of the extrusion block and the heat-conducting block is greater than the distance between the middle parts, which is conducive to the rapid outflow of moisture after the material is extruded, and also conducive to the rapid fall of the extruded material from between the extrusion block and the heat-conducting block, and also conducive to the large-volume agglomerated material entering between the extrusion block and the heat-conducting block for extrusion. The lower surface of the heat-conducting block is also convex, which is conducive to increasing the contact area between the heat-conducting block and the barrel wall, thereby facilitating the increase of the heat accumulated in the heat-conducting block, so that the heat-conducting extrusion mechanism can transfer more heat to the material when extruding the material, which is conducive to improving the drying efficiency of the material.

[0018] Preferably, a plurality of heat-conducting extrusion mechanisms are evenly distributed in the circumferential direction of the drum, the plurality of heat-conducting extrusion mechanisms form a heat-conducting extrusion group, and a plurality of heat-conducting extrusion groups are arranged in the axial direction of the drum.

[0019] By adopting the above technical solution, multiple heat-conducting extrusion mechanisms in the axial direction of the drum can extrude the material in this part multiple times. As the material moves axially in the drum, multiple heat-conducting extrusion mechanisms can extrude the material again, which is beneficial to squeeze out the water in the material and reduce the moisture in the material, thereby improving the drying efficiency.

[0020] Preferably, a cavity is provided in the extrusion block, and a slide plate is slidably connected in the cavity to divide the cavity into an upper chamber and a lower chamber, a plurality of vent holes 1 are provided at the top of the upper chamber, and a plurality of vent holes 2 are provided at the bottom of the lower chamber.

[0021] By adopting the above technical solution, the sliding of the slide in the cavity relies on its own gravity. When the heat-conducting extrusion mechanism rotates to the bottom of the drum, the extrusion block and the heat-conducting block extrude the material, and the slide moves into the lower chamber under the action of its own gravity. The slide promotes the airflow during the movement, and the airflow blows onto the material through the second vent hole, which is beneficial to improve the efficiency of material drying. When the heat-conducting extrusion mechanism moves to the top of the drum, the extrusion block moves to the side away from the heat-conducting block, and the slide moves into the upper chamber, increasing the volume in the lower chamber, which is beneficial to increase the amount of airflow blown onto the material during the extrusion of the material by the heat-conducting extrusion mechanism, thereby improving the drying efficiency.

[0022] Preferably, the heat conductive block includes heat conductive block 1, heat conductive block 2, and a connecting frame arranged between heat conductive block 1 and heat conductive block 2, the connecting frame is fixedly connected to rack 2, heat conductive block 1 is located above the connecting frame, heat conductive block 2 is located below the connecting frame, and springs are connected between heat conductive block 1, heat conductive block 2 and the connecting frame.

[0023] By adopting the above technical solution, the movement of rack 2 drives the connecting frame to move, and then drives the heat conductive block 1 and heat conductive block 2 to move. The elastic connection between heat conductive block 1, heat conductive block 2 and the connecting frame can reduce the impact force of heat conductive block 1 on the extrusion block when extruding the material, and can also reduce the impact force of heat conductive block 2 on the inner wall of the drum when it contacts the inner wall of the drum.

[0024] In another aspect, the present invention provides a drying method for producing PB boards, using the drying device for producing PB boards, comprising the following steps:

[0025] Step S1: starting the driving mechanism and the heating jacket, after the heating jacket heats the drum, adding materials into the drum;

[0026] Step S2: The heat-conducting extrusion mechanism rotates with the drum. When the heat-conducting extrusion mechanism rotates to the top of the drum, the extrusion block moves to the side away from the heat-conducting block 1 under the action of its own gravity, and drives the heat-conducting block upward through the rack 1, the gear and the rack 2 in sequence, so that the heat-conducting block can contact the inner wall of the drum to accumulate heat;

[0027] Step S3: When the heat-conducting extrusion mechanism rotates to the bottom of the drum, the extrusion block moves toward the side close to the heat-conducting block 1 under the action of its own gravity, and drives the heat-conducting block upward through the rack 1, the gear and the rack 2 in sequence, thereby extruding the material between the extrusion block and the heat-conducting block;

[0028] Step S4: The dried material is output from the drum.

[0029] By adopting the above technical solution, when the heat-conducting extrusion mechanism moves to the top of the drum, the heat-conducting block and the extrusion block move away from each other, the heat-conducting block can contact the inner wall of the drum, and the heat on the inner wall of the drum is transferred to the heat-conducting block; when the heat-conducting extrusion mechanism moves to the bottom of the drum, the heat-conducting block and the extrusion block approach each other and squeeze the material to squeeze out the moisture in the material, which is beneficial to discharge the moisture inside the agglomerated material, thereby facilitating uniform drying of the material. At the same time, the heat on the heat-conducting block is transferred to the material, which is beneficial to improving the efficiency of material drying.

[0030] The beneficial effects of the above technical solution of the present invention are as follows:

[0031] 1. The heat-conducting extrusion mechanism of the present invention rotates with the drum. When the heat-conducting extrusion mechanism moves to the top of the drum, the heat-conducting block and the extrusion block move away from each other, the heat-conducting block can contact the inner wall of the drum, and the heat on the inner wall of the drum is transferred to the heat-conducting block; when the heat-conducting extrusion mechanism moves to the bottom of the drum, the heat-conducting block and the extrusion block approach each other and squeeze the material to squeeze out the moisture in the material, which is beneficial to discharge the moisture inside the agglomerated material, thereby facilitating uniform drying of the material. At the same time, the heat on the heat-conducting block is transferred to the material, which is beneficial to improving the efficiency of material drying.

[0032] 2. A cavity is provided in the extrusion block of the present invention, and the sliding of the slide plate in the cavity relies on its own gravity. When the heat-conducting extrusion mechanism rotates to the bottom of the drum, the extrusion block and the heat-conducting block extrude the material, and the slide plate moves downward under the action of its own gravity. The slide plate pushes the airflow to move during the movement, and the airflow is blown onto the material through the second vent hole, which is beneficial to improving the efficiency of material drying.

[0033] 3. The heat-conducting block of the present invention comprises a heat-conducting block 1 and a heat-conducting block 2 elastically connected to a connecting frame, which can reduce the impact force of the heat-conducting block on the extrusion block when extruding the material. At the same time, the gravity of the extrusion block overcomes the elastic force between the heat-conducting block 1 and the connecting frame, and the extrusion block can also drop a certain distance to continue to extrude the material, which is beneficial to squeeze out the moisture in the material; it can also reduce the impact force of the heat-conducting block 2 on the inner wall of the drum when it contacts the inner wall of the drum. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of a drying device for producing PB boards of the present invention;

[0035] Figure 2 It is a schematic diagram of the structure inside the drum of the present invention;

[0036] Figure 3 is a cross-sectional view of the heat-conducting extrusion mechanism of the present invention;

[0037] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0038] Figure 5 It is a cross-sectional view of the heat conductive block of the present invention.

[0039] In the figure: 1. bracket; 2. roller; 21. feed port; 22. discharge port; 23. exhaust port; 3. driving mechanism; 4. heating sleeve; 5. heat-conducting extrusion mechanism; 51. mounting shaft; 511. slide groove; 52. extrusion block; 521. upper chamber; 522. lower chamber; 523. slide plate; 524. vent one; 525. vent two; 53. heat-conducting block; 531. heat-conducting block one; 532. heat-conducting block two; 533. connecting frame; 534. connecting piece; 535. through hole; 536. guide block; 54. transmission assembly; 541. rack one; 542. gear; 543. rack two. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be combined with the embodiments of the present invention. Figure 1-Figure 5 , the technical scheme of the embodiment of the present invention is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0041] Example

[0042] This embodiment provides a drying device for PB board production, such as Figure 1 As shown, it includes a bracket 1, a roller 2 and a driving mechanism 3.

[0043] like Figure 1 As shown, a heating sleeve 4 is provided on the drum 2 for heating the drum 2, and exhaust ports 23 are provided at both ends of the drum 2. A feed port 21 is provided at one end of the drum 2, and a discharge port 22 is provided at the other end. The diameter of the drum 2 gradually increases from one end of the feed port 21 to one end of the discharge port 22 along the axial direction, so that one end of the discharge port 22 is lower than one end of the feed port 21, and the material in the drum 2 can move toward one end of the discharge port 22 while the drum 2 rotates.

[0044] like Figure 1 As shown, a gear ring and a support ring (not shown) are fixedly mounted on the drum 2. A support wheel (not shown) is rotatably connected to the bracket 1, and the position of the support wheel corresponds to the position of the support ring, and is used to support the support ring.

[0045] like Figure 1As shown, the driving mechanism 3 is driven by a motor, including a motor fixedly mounted on the bracket 1, a driving gear fixedly mounted on the output shaft of the motor, the driving gear meshes with the ring gear, the motor drives the driving gear to rotate, and then drives the ring gear and the drum 2 to rotate.

[0046] like Figure 2 As shown, a plurality of heat-conducting extrusion mechanisms 5 are evenly distributed in the circumferential direction of the drum 2 , and the plurality of heat-conducting extrusion mechanisms 5 form a heat-conducting extrusion group. A plurality of heat-conducting extrusion groups are arranged in the axial direction of the drum 2 .

[0047] like Figure 2 and Figure 3 As shown, the heat-conducting extrusion mechanism 5 includes a mounting shaft 51 , an extrusion block 52 and a heat-conducting block 53 .

[0048] like Figure 2 and Figure 3 As shown, the mounting shaft 51 is fixedly mounted on the inner wall of the drum 2 , and the length direction of the mounting shaft 51 extends along the radial direction of the drum 2 .

[0049] like Figure 2 and Figure 3 As shown, the extrusion block 52 and the heat-conducting block 53 are slidably mounted on the mounting shaft 51, the heat-conducting block 53 is located between the extrusion block 52 and the inner wall of the drum 2, and the weight of the extrusion block 52 is greater than the weight of the heat-conducting block 53. The middle parts of the extrusion block 52 and the heat-conducting block 53 are both provided with through holes 535 through which the mounting shaft 51 can pass.

[0050] like Figure 3 and Figure 4 As shown, the installation shaft 51 is a hollow structure, and a transmission assembly 54 is installed inside. The transmission assembly 54 includes a rack 1 541, a rack 2 543 and a gear 542. The gear 542 is rotatably installed on the installation shaft 51, and the rack 1 541 and the rack 2 543 are respectively located on both sides of the gear 542, and both are meshed with the gear 542. Both sides of the installation shaft 51 are provided with a slide groove 511, and the rack 1 541 and the rack 2 543 are respectively slidably arranged in the slide groove 511. The upper and lower ends of the slide groove 511 are sealed, which can limit the rack 1 541 and the rack 2 543 to slide only in the slide groove 511. The extrusion block 52 and the heat conduction block 53 are fixedly connected to one side of the through hole 535. The connecting member 534 connecting the extrusion block 52 passes through the slide groove 511 and is fixedly connected to the rack 1 541, and the connecting member 534 connecting the heat conduction block 53 passes through the slide groove 511 and is fixedly connected to the rack 2 543.

[0051] like Figure 2 and Figure 3As shown, the heat-conducting extrusion mechanism 5 rotates with the roller 2. When the heat-conducting extrusion mechanism 5 rotates to the top of the roller 2, the extrusion block 52 is located below the heat-conducting block 53. Since the weight of the extrusion block 52 is greater than the weight of the heat-conducting block 53, the extrusion block 52 moves downward under the action of its own gravity, that is, moves to the side away from the heat-conducting block 53. The rack 1 541 moves downward to drive the gear 542 to rotate. Since the rack 1 541 and the rack 2 543 are respectively located on both sides of the gear 542, the gear 542 drives the rack 2 543 to move upward, thereby moving the heat-conducting block 53 upward until the heat-conducting block 53 contacts the inner wall of the roller 2, and the heat of the inner wall of the roller 2 is transferred to the heat-conducting block 53. Due to the action of gravity, the material is mainly concentrated in the lower part of the roller 2. As the drum 2 rotates, when the heat-conducting extrusion mechanism 5 rotates to the bottom of the drum 2, the extrusion block 52 and the heat-conducting block 53 can contact the material, and the extrusion block 52 is located above the heat-conducting block 53. The extrusion block 52 moves downward under the action of its own gravity, that is, moves toward the side close to the heat-conducting block 53, and the extrusion block 52 drives the rack 1 541 to move downward, the rack 1 541 drives the gear 542 to rotate, and the gear 542 drives the rack 2 543 to move upward, thereby moving the heat-conducting block 53 upward, and the distance between the extrusion block 52 and the heat-conducting block 53 is reduced, thereby squeezing the material. At the same time, the heat-conducting block 53 transfers heat to the material, which is beneficial to improving the drying efficiency of the material.

[0052] like Figure 3 As shown, the lower surface of the extrusion block 52 and the upper surface of the heat conductive block 531 are both convex, so that the distance between the edges of the extrusion block 52 and the heat conductive block 531 is greater than the distance between the middle parts, which is beneficial for the rapid outflow of moisture after the material is extruded, and is also beneficial for the extruded material to quickly fall from between the extrusion block 52 and the heat conductive block 53, and is also beneficial for larger agglomerated materials to enter between the extrusion block 52 and the heat conductive block 53 for extrusion.

[0053] like Figure 2 and Figure 3 As shown, the lower surface of the second heat-conducting block 532 is also convex to increase the contact area with the cylinder wall, which is beneficial to increase the heat stored in the second heat-conducting block 532, so that the heat-conducting extrusion mechanism 5 can transfer more heat to the material when extruding the material, which is beneficial to improve the drying efficiency of the material.

[0054] like Figure 3 As shown, a cavity is provided in the extrusion block 52, and a slide plate 523 is slidably connected in the cavity to divide the cavity into an upper chamber 521 and a lower chamber 522. A plurality of vent holes 524 are provided at the top of the upper chamber 521, and a plurality of vent holes 525 are provided at the bottom of the lower chamber 522.

[0055] like Figure 2 and Figure 3As shown, the sliding of the slide plate 523 in the cavity depends on its own gravity. When the heat-conducting extrusion mechanism 5 rotates to the bottom of the drum 2, the extrusion block 52 and the heat-conducting block 53 extrude the material, and the slide plate 523 moves into the lower chamber 522 under the action of its own gravity. The slide plate 523 promotes the airflow during the movement, and the airflow blows onto the material through the second vent hole 525, which is beneficial to improve the efficiency of material drying. When the heat-conducting extrusion mechanism 5 moves to the top of the drum 2, the extrusion block 52 moves to the side away from the heat-conducting block 53, and the slide plate 523 moves into the upper chamber 521, so that the volume in the lower chamber 522 increases, which is beneficial to increase the amount of air blown onto the material during the extrusion of the material by the heat-conducting extrusion mechanism 5, thereby improving the drying efficiency.

[0056] like Figure 4 As shown, the heat conductive block 53 includes a heat conductive block 1 531, a heat conductive block 2 532, and a connecting frame 533 arranged between the heat conductive block 1 531 and the heat conductive block 2 532. A connecting member 534 is installed on the connecting frame 533, and the connecting member 534 is fixedly connected to the rack 2 543. The heat conductive block 1 531 is located above the connecting frame 533, and the heat conductive block 2 532 is located below the connecting frame 533, that is, the heat conductive block 2 532 is located between the connecting frame 533 and the inner wall of the drum 2, and springs are connected between the heat conductive block 1 531 and the heat conductive block 2 532 and the connecting frame 533.

[0057] like Figure 4 and Figure 5 As shown, guide blocks 536 are provided at the locations of the through holes 535 on the heat conductive blocks 1 531 and 2 532. The guide blocks 536 are parallel to the connecting member 534 and are both installed in the slide groove 511. The guide blocks 536 slide in the slide groove 511 to guide the up and down sliding of the heat conductive blocks 1 531 and 2 532.

[0058] like Figure 3 and Figure 5 As shown, the movement of the rack 2 543 drives the connection frame 533 to move, and then drives the heat conductive block 1 531 and the heat conductive block 2 532 to move. The elastic connection between the heat conductive block 1 531 and the heat conductive block 2 532 and the connection frame 533 can reduce the impact force of the heat conductive block 1 531 on the extrusion block 52 when the material is extruded, and can also reduce the impact force of the heat conductive block 2 532 on the inner wall of the drum 2 when it contacts the inner wall of the drum 2. In addition, since the heat conductive block 1 531 and the connection frame 533 are elastically connected, the weight of the extrusion block 52 is heavier. After the lower end surface of the extrusion block 52 and the upper end surface of the heat conductive block 1 531 extrude the material, the gravity of the extrusion block 52 overcomes the elastic force between the heat conductive block 1 531 and the connection frame 533, and the extrusion block 52 can also drop a distance to continue to extrude the material, which is conducive to squeezing out the moisture in the material.

[0059] A drying method for producing PB boards, using the drying device for producing PB boards, comprises the following steps:

[0060] Step S1: starting the driving mechanism 3 and the heating jacket 4, after the heating jacket 4 heats the drum 2, adding materials to the feed port 21 of the drum 2;

[0061] Step S2: The heat-conducting extrusion mechanism 5 rotates along with the roller 2. When the heat-conducting extrusion mechanism 5 rotates to the top of the roller 2, the extrusion block 52 is located below the heat-conducting block 53. Since the weight of the extrusion block 52 is greater than the weight of the heat-conducting block 53, the extrusion block 52 moves downward under the action of its own gravity, that is, moves to the side away from the heat-conducting block 53. The rack 1 541 moves downward to drive the gear 542 to rotate. Since the rack 1 541 and the rack 2 543 are respectively located on both sides of the gear 542, the gear 542 drives the rack 2 543 to move upward, thereby moving the heat-conducting block 53 upward until the heat-conducting block 53 contacts the inner wall of the roller 2, and the heat of the inner wall of the roller 2 is transferred to the heat-conducting block 53. The slide plate 523 in the extrusion block 52 moves into the upper chamber 521 to increase the volume in the lower chamber 522.

[0062] Step S3: When the heat-conducting extrusion mechanism 5 rotates to the bottom of the drum 2, the extrusion block 52 and the heat-conducting block 53 can contact the material, and the extrusion block 52 is located above the heat-conducting block 53. The extrusion block 52 moves downward under the action of its own gravity, that is, moves toward the side close to the heat-conducting block 53, and the extrusion block 52 drives the rack 1 541 to move downward, the rack 1 541 drives the gear 542 to rotate, and the gear 542 drives the rack 2 543 to move upward, thereby moving the heat-conducting block 53 upward, and the distance between the extrusion block 52 and the heat-conducting block 53 is reduced, thereby extruding the material. At the same time, the heat-conducting block 53 transfers heat to the material, and the slide plate 523 moves into the lower chamber 522 under the action of its own gravity. The slide plate 523 promotes the movement of the air flow during the movement, and the air flow blows onto the material through the vent hole 2 525, which is beneficial to improving the drying efficiency of the material;

[0063] Step S4: the dried material is discharged from the discharge port 22 of the drum 2.

[0064] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A drying device for producing PB boards, comprising a drum (2), a driving mechanism (3) for driving the drum (2) to rotate, a heating sleeve (4) being provided on the outer wall of the drum (2), and characterized in that: A heat-conducting extrusion mechanism (5) is provided inside the roller (2), and the heat-conducting extrusion mechanism (5) comprises a mounting shaft (51) fixed on the inner wall of the roller (2), an extrusion block (52) and a heat-conducting block (53) mounted on the mounting shaft (51) in an up-and-down sliding manner; the weight of the extrusion block (52) is greater than the weight of the heat-conducting block (53), the heat-conducting block (53) is located between the extrusion block (52) and the inner wall of the roller (2), and the length direction of the mounting shaft (51) extends along the radial direction of the roller (2); A rack 1 (541) and a rack 2 (543) are slidably provided on the mounting shaft (51), and a gear (542) is also rotatably connected to the mounting shaft (51), the gear (542) is located between the rack 1 (541) and the rack 2 (543) and meshes with both the rack 1 (541) and the rack 2 (543), the extrusion block (52) is fixedly connected to the rack 1 (541), and the heat conduction block (53) is fixedly connected to the rack 2 (543); A cavity is provided in the extrusion block (52), and a slide plate (523) is slidably connected in the cavity to divide the cavity into an upper chamber (521) and a lower chamber (522). A plurality of first vent holes (524) are provided at the top of the upper chamber (521), and a plurality of second vent holes (525) are provided at the bottom of the lower chamber (522).

2. The drying device for PB board production according to claim 1, characterized in that: The mounting shaft (51) is a hollow structure, and the gear (542), the first rack (541) and the second rack (543) are all arranged inside the mounting shaft (51).

3. The drying device for PB board production according to claim 2, characterized in that: Slide grooves (511) are provided on both sides of the installation shaft (51), and rack one (541) and rack two (543) are respectively slidably arranged in the slide grooves (511). A through hole (535) capable of allowing the installation shaft (51) to pass through is provided in the middle of the extrusion block (52) and the heat conduction block (53). A connecting piece (534) capable of passing through the slide groove (511) and fixedly connected to rack one (541) or rack two (543) is installed on one side of the through hole (535).

4. The drying device for PB board production according to claim 3, characterized in that: The lower surface of the extrusion block (52) and the upper surface of the heat conducting block (53) are both convex surfaces, so that the distance between the edges of the extrusion block (52) and the heat conducting block (53) is greater than the distance between the middle parts; the lower surface of the heat conducting block (53) is also convex to increase the contact area with the cylinder wall.

5. The drying device for PB board production according to claim 4, characterized in that: A plurality of heat-conducting extrusion mechanisms (5) are evenly distributed in the circumferential direction of the roller (2); the plurality of heat-conducting extrusion mechanisms (5) form a heat-conducting extrusion group; and a plurality of heat-conducting extrusion groups are arranged in the axial direction of the roller (2).

6. The drying device for PB board production according to claim 5, characterized in that: The heat conducting block (53) comprises a heat conducting block 1 (531), a heat conducting block 2 (532), and a connecting frame (533) arranged between the heat conducting block 1 (531) and the heat conducting block 2 (532); the connecting frame (533) is fixedly connected to the rack 2 (543); the heat conducting block 1 (531) is located above the connecting frame (533); the heat conducting block 2 (532) is located below the connecting frame (533); and springs are connected between the heat conducting block 1 (531), the heat conducting block 2 (532) and the connecting frame (533).

7. A drying method for producing PB boards, using the drying device for producing PB boards according to claim 1, characterized in that: The following steps are involved: Step S1: starting the driving mechanism (3) and the heating jacket (4), and after the heating jacket (4) heats the drum (2), adding materials into the drum (2); Step S2: the heat-conducting extrusion mechanism (5) rotates along with the roller (2). When the heat-conducting extrusion mechanism (5) rotates to the top of the roller (2), the extrusion block (52) moves to a side away from the heat-conducting block 1 (531) under the action of its own weight, and drives the heat-conducting block (53) to move upwards through the rack 1 (541), the gear (542) and the rack 2 (543) in sequence, so that the heat-conducting block (53) can contact the inner wall of the roller (2) to accumulate heat; Step S3: When the heat-conducting extrusion mechanism (5) rotates to the bottom of the drum (2), the extrusion block (52) moves toward the side close to the heat-conducting block 1 (531) under the action of its own weight, and drives the heat-conducting block (53) to move upward through the rack 1 (541), the gear (542) and the rack 2 (543) in sequence, thereby extruding the material between the extrusion block (52) and the heat-conducting block (53); Step S4: the dried material is output from the drum (2).

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