Drying machine

Abstract

The utility model relates to the field of drying equipment, in particular to a drying machine which comprises a rack, a shell, a drying device and a conveying device, the shell is arranged on the rack and provided with a feeding port and a discharging port, a drying cavity is defined by the drying device and the shell, and the conveying device comprises a driving conveying roller set and a supporting conveying roller set. The driving conveying roller set comprises a plurality of driving conveying rollers and transmission belt assemblies used for achieving pairwise synchronous transmission of the driving conveying rollers, the two sides of each driving conveying roller are connected with the transmission belt assemblies respectively, the supporting conveying roller set comprises a plurality of supporting conveying rollers, and each supporting conveying roller is driven by materials to achieve respective rotation. And each supporting conveying roller is arranged between every two driving conveying rollers at intervals, so that an alternately arranged conveying roller layout is formed. According to the structural design, a more uniform drying effect can be achieved, stable conveying of the materials can be achieved without precisely adjusting the tensioning force at the two ends of the materials, and the conveying precision of the materials is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of drying equipment, in particular to a drying machine. BACKGROUND

[0002] Mirror stainless steel and aluminum alloy have been widely used in modern industry and life due to their excellent performance and unique surface characteristics. Whether it is high-end building curtain wall, home decoration, or aerospace, automobile manufacturing and other fields, these materials are favored for their light weight, high strength, corrosion resistance and beautiful appearance.

[0003] In the production process of mirror stainless steel and aluminum alloy, in order to achieve the ideal mirror effect, it is usually necessary to go through surface grinding and polishing, surface cleaning, drying and other processes. The drying step is the key link to ensure the surface quality of the material. Because the surface characteristics of mirror stainless steel and aluminum alloy are extremely sensitive to moisture, residual moisture not only affects the surface quality of the material, but also may cause corrosion, discoloration and other problems during subsequent storage or use, which seriously affects the appearance and service life of the product. Therefore, by sending the cleaned material into the dryer for drying, the surface moisture is removed to prevent surface oxidation or corrosion caused by residual moisture, thereby ensuring the smooth progress of subsequent processes such as coating, packaging, etc. To solve the drying problem of mirror stainless steel and aluminum alloy, the commonly used means is usually hot air drying and heating tube drying method. Hot air drying blows heated air to the surface of the material through a hot air circulation system, and uses heat conduction and convection to realize water evaporation; although it can realize rapid drying, but because mirror stainless steel is sensitive to temperature, too high temperature may cause material surface oxidation or discoloration. The temperature control of hot air dryer is not accurate, and it is difficult to ensure the stability and uniformity of the temperature during drying. The heating tube drying method directly heats the material surface through several heating tubes arranged in the drying chamber to achieve the purpose of drying. Compared with hot air drying, heating tube drying usually includes drying shell, heating tube and conveying roller. The conveying roller is located above the heating tube, and when the material is conveyed through the conveying roller, the heating tube at the bottom is heated to achieve the purpose of drying, avoiding the problem of local drying or local residual moisture caused by uneven distribution of hot air, and realizing more uniform drying effect. In addition, the heating tube drying method can usually control the drying temperature more accurately, to a certain extent, improving the stability and uniformity of the temperature during drying. However, the existing heating tube drying method has obvious defects after long-term use. It is found that after the mirror stainless steel is conveyed to the dryer for drying and sent out from the discharge port, it usually needs to be wound by a winding roller to make the material both ends have a tightening force, so as to avoid the surface of the mirror stainless steel not being flat enough, resulting in uneven surface drying, and the friction coefficient between the smooth mirror stainless steel and the conveying roller is small, especially for the mirror stainless steel which has just been treated by surface cleaning. Because the drying may not be uniform under the condition of residual moisture on the surface of the material, and the friction force will be further reduced, the conveying roller and the stainless steel surface are prone to slip, and because the winding speed is difficult to control accurately, the stainless steel is prone to slip friction with the conveying roller during conveying, so that the stainless steel cannot be conveyed according to the predetermined trajectory and speed, thereby reducing the conveying accuracy of the mirror stainless steel and other materials, thereby affecting the drying effect of the material. These problems seriously restrict the quality improvement of the drying process, and an effective technical solution is needed to solve the above defects. Practical new type content

[0004] In order to ensure that the material surface can obtain more uniform drying effect, in the drying process, without precise adjustment of the speed of winding to ensure that it obtains suitable tension, it can make the material transfer according to the predetermined trajectory and speed, avoid slipping, thereby improving the transfer accuracy of the material, and ensuring that it achieves better drying effect, the application provides a dryer.

[0005] A dryer comprises a rack, a shell, a drying device and a conveying device, the shell is arranged on the rack, the shell is provided with an inlet and an outlet, the drying device and the conveying device are arranged in the shell, the inlet and the outlet are communicated with the drying chamber, the conveying device comprises a driving roller group and a supporting roller group, the driving roller group comprises a plurality of driving rollers and a transmission belt assembly for realizing the synchronous transmission of the driving rollers, the two sides of each driving roller are connected with the transmission belt assembly through the shell, the supporting roller group comprises a plurality of supporting rollers, each supporting roller is arranged in the shell and is driven by the material to rotate, and each supporting roller is arranged between the driving rollers to form an alternating arrangement of the driving rollers and the supporting rollers. Through the above technical scheme, the cooperation of the driving roller group and the supporting roller group can effectively solve the problem of conveying stability of mirror stainless steel and aluminum alloy during drying. Specifically, the synchronous transmission of the driving rollers through the transmission belt assembly ensures the uniform stress of the material during conveying, avoiding the sliding or distortion of the material caused by the inconsistent rotating speed of the individual driving rollers. At the same time, the supporting rollers are arranged between the driving rollers and driven by the movement of the material to rotate, and the alternating arrangement of the driving rollers and the supporting rollers increases the contact points between the material and the rollers, disperses the weight and friction of the material, reduces the pressure on the single roller, and improves the stability of the conveying process. In addition, the design that the supporting rollers are driven by the material to rotate can adjust the rotation according to the conveying condition of the material even if there is residual moisture on the surface of the material and the friction coefficient is low. That is, if the tension at both ends of the material is not suitable, the supporting rollers can provide friction in the opposite direction to limit the sliding of the material and improve the conveying stability, avoiding the slipping problem caused by insufficient friction in the existing dryer. In summary, the design scheme starts from structural optimization, reasonably arranges the driving rollers and the supporting rollers, significantly improves the conveying accuracy and stability of mirror stainless steel and aluminum alloy during drying, and ensures the uniformity of the drying effect and the quality of the material surface. Preferably, the transmission belt assembly comprises a plurality of transmission wheels and a transmission belt, the two sides of the driving roller are connected with the transmission wheels through the shell, and the transmission wheels are commonly connected with the transmission belt. Through the above technical scheme, the two sides of the driving roller are connected with the transmission wheels, and the transmission wheels are commonly connected with the transmission belt to realize the synchronous rotation of the driving rollers.The design can effectively avoid the slipping or wrinkling phenomenon in the material transmission process caused by the inconsistent rotation speed of the single driving roller. At the same time, since the tension of the transmission belt is uniformly distributed on each transmission wheel, the driving force of each driving roller is more stable, further improving the transmission accuracy and stability of the material in the drying chamber. In addition, the structure also simplifies the complexity of the transmission system, facilitating maintenance and adjustment, thereby improving the working efficiency and reliability of the whole drying machine. Preferably, each driving roller is uniformly and parallelly arranged, and each supporting roller is uniformly and parallelly arranged with the driving roller. By adopting the above technical scheme, the driving roller and the supporting roller are uniformly and parallelly arranged, which can ensure that the material is uniformly stressed during transmission. Specifically, the uniformly spaced driving rollers are synchronously driven by the transmission belt assembly, providing a stable driving force for the material and avoiding the phenomenon of slipping or unstable transmission caused by uneven power. At the same time, the supporting rollers are parallelly arranged with the driving rollers and alternately arranged therebetween, forming a continuous support structure below the material. This design not only effectively disperses the weight of the material, but also reduces the contact pressure between the material and the roller, thereby reducing the influence of friction on the transmission stability. In addition, the uniformly distributed supporting rollers can ensure that the water on the surface of the material is uniformly evaporated during drying, avoiding the problem of water residue caused by insufficient local support, thereby improving the drying effect and the surface quality of the material. Preferably, the outer diameter of each driving roller is equal to the outer diameter of each supporting roller. By adopting the above technical scheme, the outer diameter of the driving roller and the supporting roller is equal, so that they can form a more uniform contact surface during material transmission. Since the outer diameters are the same, the driving roller and the supporting roller can avoid the problem of uneven surface tension of the material caused by the difference in outer diameter when they are alternately arranged, thereby reducing the shaking and deviation of the material during transmission. In addition, this design can also ensure the smooth movement of the material in the drying chamber, avoiding the additional friction or slipping phenomenon caused by the change in contact surface height, further improving the stability of material transmission. Ultimately, this uniform contact and stable transmission helps to improve the drying effect and ensure that the water on the surface of the material is uniformly removed, meeting the high requirements of mirror-type stainless steel and aluminum alloy on drying quality. Preferably, the two sides of the shell are provided with placing grooves corresponding to the supporting rollers, and the two sides of the supporting rollers are placed in the placing grooves. By adopting the above technical scheme, the two sides of the supporting roller are placed in the placing grooves arranged on the two sides of the shell, which can effectively limit the displacement of the supporting roller during work. Specifically, when the material passes through the drying chamber, its surface is smooth and may have residual water, which will cause the friction between the material and the roller to be small and prone to slipping. If the supporting roller is not effectively positioned, the supporting roller may deviate or shake due to the traction of the material, thereby affecting the stable transmission of the material.The existence of the placing groove provides a stable mounting position for the supporting conveying roller, so that the supporting conveying roller remains stationary during the material conveying process, thereby ensuring that the material can smoothly pass through the drying chamber according to the predetermined trajectory and speed, avoiding the problem of inaccurate material conveying caused by unstable supporting conveying roller, and improving the overall performance of the drying machine. Preferably, the drying device comprises a plurality of heating pipes, each of which is arranged in the shell and located directly below the driving conveying roller. By adopting the above technical solution, the heating pipes are arranged in the shell and located directly below the driving conveying roller, which can ensure that the heat acts directly on the bottom surface of the material. Since mirror-type stainless steel and aluminum alloy are sensitive to temperature, this layout can not only effectively avoid the problem of local overheating caused by uneven hot air, but also fully utilize the principle of heat conduction to uniformly transfer heat to the surface of the material, thereby achieving efficient and uniform drying effect. At the same time, since the relative position between the driving conveying roller and the heating pipe is fixed, a stable heat source can be continuously provided during the material conveying process, further improving the stability of the drying process. This design ingeniously solves the problems of inaccurate temperature control and uneven drying in the prior art, significantly improves the drying quality, ensures that there is no residual moisture on the surface of the material, and meets the requirements of the subsequent process for the surface quality. Preferably, each of the heating pipes is uniformly spaced and arranged in parallel, and is perpendicular to the supporting conveying roller. By adopting the above technical solution, the heating pipes are uniformly spaced and arranged in parallel, which can ensure that the heat is more evenly distributed in the drying chamber, avoiding the problem of poor drying effect caused by uneven heat concentration or dispersion. At the same time, since the heating pipes are arranged vertically to the supporting conveying roller, this design enables the heat to act more effectively on the surface of the material, reduces heat loss, and improves the efficiency of heat energy utilization. In addition, the uniformly distributed heating pipes can also effectively prevent the material from deforming or having surface quality problems due to uneven heating during the drying process, thereby ensuring that the drying effect of mirror-type stainless steel and aluminum alloy and other materials is more uniform and stable, further improving the surface quality and drying efficiency of the material. Preferably, the shell is provided with an air outlet, and the air outlet is communicated with the drying chamber. By adopting the above technical solution, the hot air in the drying chamber will gradually become humid during the drying process, and the humid hot air can be discharged from the drying chamber through the air outlet, avoiding excessive accumulation of humid air in the chamber, thereby affecting the drying efficiency and effect. In addition, by communicating the air outlet with the drying chamber, it can ensure that the chamber maintains a good air flow state, further promoting water evaporation and improving drying uniformity. This design not only helps to improve the drying quality, but also effectively prevents the material surface from being oxidized or corroded due to moisture residue, ensuring that the surface properties of mirror-type stainless steel and aluminum alloy and other materials are fully protected. Preferably, the drying machine further comprises a guiding device for guiding the material to the feeding port, and the guiding device comprises a driving motor and a guiding roller, both sides of the guiding roller penetrate through both sides of the shell and are connected with the driving motor.By adopting the above technical scheme, the positioning problem of the material when entering the dryer can be effectively solved by adding the guide device. Specifically, the driving motor drives the guide roller to rotate, and the two sides of the guide roller are stably transmitted through the connection with the shell. Before the material enters the feed port, the rotary motion of the guide roller can preliminarily guide and correct the material, ensuring that the material enters the drying chamber at the correct angle and position. In addition, since the guide roller is directly driven by the driving motor, its speed and direction can be accurately controlled, thereby avoiding the phenomenon of material deviation or slipping due to insufficient friction. This design not only improves the accuracy of material transmission, but also further ensures the uniformity and stability of the subsequent drying process, significantly improving the overall performance of the dryer. Preferably, the number of guide rollers is two, and the two guide rollers are parallelly distributed to form a guide gap for conveying the material. The surface of the two guide rollers is sleeved with a flexible adsorbing fabric. By adopting the above technical scheme, the two guide rollers are arranged in parallel to form a guide gap, which can ensure that the material is accurately guided to the feed port before entering the drying chamber. Since the surface of the guide roller is sleeved with a flexible adsorbing fabric, the fabric can effectively adsorb the residual moisture on the surface of the material, reducing the influence of moisture on the subsequent drying effect. At the same time, the flexible adsorbing fabric increases the friction between the guide roller and the material, avoiding the slipping phenomenon caused by the smooth surface of the material, thereby improving the stability of material conveying. In addition, the parallel arrangement of the two guide rollers makes the material maintain a flat state in the guide gap, further ensuring that the material enters the drying chamber at a uniform speed and posture, providing a good foundation for the subsequent drying process. This design not only solves the problem of unstable material conveying in traditional dryers, but also significantly improves the overall quality of the drying process.

[0006] In summary, the present application includes at least one of the following beneficial technical effects:

[0007] 1. The active conveying roller group and the support conveying roller group adopt an alternating arrangement layout, wherein the active conveying roller group realizes synchronous transmission between each active conveying roller through the transmission belt assembly. This design can ensure that the material receives uniform driving force during the drying process, avoiding the problem of unstable overall conveying caused by slipping of a single conveying roller. At the same time, the design of the support conveying roller group enables the material to obtain additional support force when passing between each active conveying roller, effectively reducing the shaking or deviation of the material during transmission, significantly improving the conveying accuracy of the material, thereby ensuring better drying effect; 2. The support conveying rollers and the driving conveying rollers form a uniform interval layout, and the support conveying rollers are driven by the material to rotate. This design not only ensures the smooth transmission of the material in the drying chamber, but also avoids the sliding friction between the support conveying rollers and the material surface due to the static state of the support conveying rollers, thereby reducing the potential damage to the material surface. In addition, due to the reasonable interval between the support conveying rollers and the driving conveying rollers, the material can maintain a certain tension during transmission, further improving the transmission stability of the material, thereby providing a strong guarantee for the drying uniformity; 3. The heating pipe is arranged vertically below the driving conveying roller and the support conveying roller, realizing the stable distribution of the drying temperature on the material surface. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 is an exploded view of the drying machine of the present application;

[0009] Figure 2 is a right view of the drying machine of the present application;

[0010] Figure 3 is Figure 2 A-A sectional view of

[0011] BRIEF DESCRIPTION OF DRAWINGS: 1. frame; 2. shell; 3. drying device; 4. conveying device; 5. guiding device; 6. drying chamber; 7. feeding port; 8. discharging port; 21. air outlet; 22. placing groove; 31. heating pipe; 41. driving conveying roller group; 42. support conveying roller group; 51. guiding roller; 52. driving motor; 53. guiding gap; 411. driving conveying roller; 412. transmission wheel; 413. transmission belt; 421. support conveying roller. DETAILED DESCRIPTION

[0012] The present application will be further described below in conjunction with the accompanying drawings. Figures 1-3 The present application will be further described below in conjunction with the accompanying drawings.

[0013] The drying machine provided by the embodiment of the present application, with reference to Figure 1 and Figure 2The dryer comprises a rack 1, a shell 2, a drying device 3, a conveying device 4 and a guiding device 5. The shell 2 is horizontally arranged on the rack 1. The drying device 3 is arranged at the bottom of the shell 2 and forms a drying chamber 6 with the shell 2 for drying the surface moisture of the material. The drying chamber 6 is provided with an inlet 7 and an outlet 8 at the front and rear ends respectively. The conveying device 4 is arranged between the drying device 3 and the shell 2 and located in the drying chamber 6 for conveying the material. The guiding device 5 is arranged in front of the inlet 7 for conveying the material to the inlet 7. The shell 2 is provided with two air outlets 21 for discharging excessive hot air in the drying chamber 6 to avoid high temperature and affect the drying effect. The material is guided from the inlet 7 to the conveying device 4 by the guiding device 5. Then the bottom drying device 3 generates heat and acts on the material on the conveying device 4 to achieve the purpose of drying. After drying, the material is transported to the additional winding roller for winding through the outlet 8.

[0014] Specifically referring to Figure 3 The conveying device 4 comprises two groups of conveying roller groups in different states, one of which is a driving conveying roller group 41 and the other is a supporting conveying roller group 42. The driving conveying roller group 41 of the embodiment comprises five driving conveying rollers 411 and a transmission belt assembly for realizing the synchronous transmission of each driving conveying roller 411. The transmission belt assembly comprises ten transmission wheels 412 and eight transmission belts 413. One driving conveying roller 411 corresponds to two transmission wheels 412. The transmission wheels 412 on both sides of each driving conveying roller 411 are connected through the shell 2. The transmission wheels 412 are connected by sleeving a transmission belt 413. That is, except that the transmission wheels 412 of the two ends of the driving conveying roller 411 are sleeved with a transmission belt 413, the remaining three transmission wheels 412 are sleeved with two transmission belts 413. In addition, the transmission wheel 412 is provided with two grooves for placing the transmission belt 413, and the two grooves are parallelly arranged, so that the transmission wheels 412 can be synchronously and stably transmitted, and the transmission belt 413 can be prevented from slipping out. The transmission wheel 412 can be made of high-strength metal material, such as stainless steel or aluminum alloy, to ensure its durability in high-temperature environment. The transmission belt 413 can be made of high-temperature-resistant rubber material or polyurethane material to adapt to the working environment in the dryer.

[0015] It is worth mentioning that the active conveying roller 411 of the embodiment does not need to be installed with a driving motor 52, and after the material is conveyed to the feeding port 7, as long as the material contacts the first active conveying roller 411, the first active conveying roller 411 will rotate due to the friction between the material and the active conveying roller 411, so that the first active conveying roller 411 drives the second active conveying roller 411, the second active conveying roller 411 drives the third active conveying roller 411, the third active conveying roller 411 drives the fourth active conveying roller 411, and the fourth active conveying roller 411 drives the fifth active conveying roller 411, so as to realize synchronous rotation and keep the rotating speed consistent, and stably convey the material.

[0016] In the embodiment, the support conveying roller group 42 includes five support conveying rollers 421, and the two sides of the shell 2 are provided with placing grooves 22 corresponding to the support conveying rollers 421. The two sides of each support conveying roller 421 penetrate the shell 2 and are placed in the placing grooves 22. Each support conveying roller 421 can rotate under the driving of the material. The support conveying rollers 421 are arranged between the two active conveying rollers 411, and the support conveying rollers 421 and the active conveying rollers 411 form an alternating arrangement of conveying rollers, which improves the stability of material conveying and the uniformity of drying.

[0017] It is worth mentioning that the support conveying roller 421 also rotates under the driving of the material, but the rotating speed of each support conveying roller 421 is not synchronized with the rotating speed of the active conveying roller 411, and the rotating speed of each support conveying roller 421 can be different, so that each support conveying roller 421 can rotate independently. According to the different conveying conditions of the material, the material can be adjusted in real time, and the active conveying roller 411 can be matched to ensure that the material can be stably conveyed, so as to avoid slipping and improve the accuracy of conveying.

[0018] Further, the five driving conveying rollers 411 are uniformly spaced and arranged in parallel, and the five supporting conveying rollers 421 are uniformly spaced and arranged in parallel with the driving conveying rollers 411. This layout not only ensures that the material is uniformly stressed during conveying, but also effectively avoids the problem of uneven heating of the material surface caused by uneven spacing between the conveying rollers. The spacing between the driving conveying rollers 411 and the supporting conveying rollers 421 can be adjusted according to the material thickness and drying temperature, and the spacing is controlled between 8 cm and 20 cm, and the preferred value of the embodiment is 10 cm, so as to ensure that the material can run smoothly in the drying chamber 6, and at the same time, a better drying effect can be obtained. In addition, the outer diameter of each driving conveying roller 411 is equal to the outer diameter of each supporting conveying roller 421. Such a design can ensure that the material will not vibrate or deviate when passing through the driving conveying rollers 411 and the supporting conveying rollers 421 due to the height difference, thereby improving the stability of the conveying. Specifically, the drying device 3 of the embodiment includes nine heating pipes 31 arranged in parallel with each other, and the nine heating pipes 31 are arranged below the driving conveying rollers 411 in equal intervals, and the heating pipes 31 are arranged in a direction perpendicular to the driving conveying rollers 411. The arrangement of the heating pipes 31 can ensure that the heat is uniformly distributed in the drying chamber 6, avoiding the occurrence of local overheating or overcooling, and improving the drying efficiency. The heating pipes 31 can select quartz pipes or ceramic pipes as the material to ensure their stability and durability in high-temperature environments. Further, the drying machine of the embodiment further includes a guiding device 5 to further improve the conveying accuracy of the material. The guiding device 5 includes a driving motor 52 and a guiding roller 51, and the two sides of the guiding roller 51 are penetrated through the two sides of the shell 2 and connected with the driving motor 52. The number of guiding rollers 51 in the embodiment is two, and the two guiding rollers 51 are distributed in parallel to form a guiding gap 53 for conveying the material, and the two guiding rollers 51 are parallel to the driving conveying rollers 411 to avoid deviation during conveying, and the surfaces of the two guiding rollers 51 are sleeved with flexible adsorption fabrics. The flexible adsorption fabric increases the friction between the guiding roller 51 and the material, and also absorbs the moisture on the surface of the material, avoiding uneven distribution of the moisture on the surface of the material, conveying to the drying chamber 6 for drying. Because the surface moisture is uneven, the surface temperature is uneven, which leads to uneven drying of the surface after drying, and some prints may affect the appearance. The implementation principle of the embodiment is that the driving motor 52 in the guiding device 5 drives the two guiding rollers 51 to rotate, and the material is conveyed to the feeding port 7 through the guiding gap 53 between the two guiding rollers 51. When the material passes through the guiding gap 53, the flexible adsorption fabric sleeved on the surface of the guiding roller 51 absorbs the moisture on the surface of the material to avoid uneven drying. After the material enters the drying chamber 6 through the feeding port 7, it is conveyed by the driving conveying roller group 41 and the supporting conveying roller group 42 of the conveying device 4.The driving transmission roller group 41 rotates synchronously without motor drive through the friction between the material and the transmission roller, and the transmission belt assembly ensures stable transmission. The support transmission roller group 42 is arranged between the driving transmission rollers 411 in an alternating arrangement, rotates independently under the drive of the material, adjusts the transmission state in real time, and improves the transmission stability and accuracy. At the same time, the heating pipe 31 of the drying device 3 is arranged in a specific manner directly below the driving transmission roller 411, uniformly releases heat, and ensures uniform heating of the material. During the whole process, the air outlet 21 of the shell 2 effectively discharges excessive hot air, maintains the appropriate temperature of the drying chamber 6. After drying, the material is output to the additional winding roller through the discharge port 8 to complete the winding, realizes uniform drying effect, and in the drying process, without the need for precise adjustment of the winding speed to ensure that it obtains appropriate tension, the material can be transmitted according to the predetermined trajectory and speed, avoiding slipping, thereby improving the transmission accuracy of the material.

[0019] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made on the basis of the structure, shape, principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A dryer, comprising a frame (1), a housing (2) and a drying device (3) and a conveying device (4) which are arranged in the housing (2), the housing (2) is arranged on the frame (1), the housing (2) is provided with an inlet (7) and an outlet (8), the drying device (3) and the housing (2) enclose a drying chamber (6), the conveying device (4) is located in the drying chamber (6), the inlet (7) and the outlet (8) are communicated with the drying chamber (6), characterized in that, The conveying device (4) comprises: a driving conveying roller group (41) and a supporting conveying roller group (42), the driving conveying roller group (41) comprises a plurality of driving conveying rollers (411) and a transmission belt assembly for realizing synchronous transmission of each two driving conveying rollers (411), the two sides of each driving conveying roller (411) are connected with the transmission belt assembly through the two sides of the shell (2), the supporting conveying roller group (42) comprises a plurality of supporting conveying rollers (421), each supporting conveying roller (421) is arranged on the shell (2) and is driven by the material to realize rotation, and each supporting conveying roller (421) is arranged between each two driving conveying rollers (411) to form an alternating arrangement of conveying rollers.

2. The dryer according to claim 1, characterized in that, The transmission belt assembly comprises a plurality of transmission wheels (412) and a transmission belt (413), the two sides of each driving conveying roller (411) are connected with the transmission wheel (412) through the two sides of the shell (2), and the transmission wheel (412) is commonly driven and connected with the transmission belt (413).

3. The dryer according to claim 1, characterized in that, Each driving conveying roller (411) is uniformly and parallel arranged, and each supporting conveying roller (421) is uniformly and parallel arranged with the driving conveying roller (411).

4. The dryer according to claim 1, characterized in that, The outer diameter of each driving conveying roller (411) is equal to the outer diameter of each supporting conveying roller (421).

5. The dryer according to claim 1, characterized in that, The two sides of the shell (2) are provided with a placing groove (22) corresponding to the supporting conveying roller (421), and the two sides of the supporting conveying roller (421) are placed in the placing groove (22).

6. The dryer according to claim 3, characterized in that, The drying device (3) comprises a plurality of heating pipes (31), each heating pipe (31) is arranged on the shell (2) and located directly below the driving conveying roller (411).

7. The dryer according to claim 6, characterized in that, Each heating pipe (31) is uniformly and parallel arranged and perpendicular to the supporting conveying roller (421).

8. The dryer of claim 1, wherein, The shell (2) is provided with an air outlet (21), and the air outlet (21) is communicated with the drying chamber (6).

9. The dryer of claim 1, wherein, The dryer further comprises a guiding device (5) for guiding the material to the feeding port (7), the guiding device (5) comprises a driving motor (52) and a guiding roller (51), and the two sides of the guiding roller (51) are connected with the driving motor (52) through the two sides of the shell (2).

10. The dryer according to claim 9, characterized in that, The number of the guiding roller (51) is two, the two guiding rollers (51) are parallel distributed to form a guiding gap (53) for conveying the material, and the surfaces of the two guiding rollers (51) are provided with flexible adsorption fabrics.

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