Drying equipment

Abstract

The utility model provides drying equipment. The drying equipment comprises a drying cylinder, a rotating shaft, a first sealing structure, a heat insulation structure and an air guide structure. The drying cylinder is provided with a drying cavity and a mounting hole communicating with the drying cavity. The rotating shaft is rotatably arranged in the mounting hole in a penetrating mode. The first sealing structure is arranged on the rotating shaft in a sleeving mode and located between the inner wall of the mounting hole and the rotating shaft. A ventilation flow channel communicating with the drying cavity is formed between the first sealing structure and the rotating shaft. The air guide structure is arranged on the side, away from the drying cylinder, of the first sealing structure and provided with an air guide flow channel communicating with the ventilation flow channel, and the air guide flow channel is arranged in a bent mode. The heat insulation structure is arranged on the side, away from the rotating shaft, of the first sealing structure and located outside the drying cylinder. The first sealing structure seals the rotating shaft and the mounting hole, the air-tight sealing of the rotating shaft is achieved through the air guide flow channel and the ventilation flow channel, the blocking effect on materials can be improved through the bending arrangement of the air guide flow channel, the heat conducted to the first sealing structure can be reduced through the heat insulation structure, and the reliability is improved.

Description

Technical Field

[0001] This application relates to the field of material drying technology, and more particularly to a drying device. Background Technology

[0002] Drying equipment dries materials by heating them inside a drying drum. To accelerate the drying process, a rotating shaft and a stirring paddle are typically installed in the drying drum. The stirring paddle, mounted on the rotating shaft, agitates the material, thereby increasing the drying speed. In traditional drying equipment, the heat from the drying drum is continuously conducted to the connection between the rotating shaft and the drying drum. This heat can easily damage the sealing structure between the shaft and the drum, leading to abnormal sealing or even failure. This can cause material leakage and reduce the reliability of the drying equipment. Utility Model Content

[0003] This application provides a drying device to solve the problem that the sealing structure between the rotating shaft and the drying cylinder is easily damaged by heat.

[0004] This application provides a drying device, comprising a drying cylinder, a rotating shaft, a first sealing structure, a heat insulation structure, and a gas guiding structure. The drying cylinder has a drying chamber and a mounting hole communicating with the drying chamber. The rotating shaft is rotatably inserted into the mounting hole. The first sealing structure is sleeved on the rotating shaft and located between the inner wall of the mounting hole and the rotating shaft. A gas passage communicating with the drying chamber is formed between the first sealing structure and the rotating shaft. The gas guiding structure is located on the side of the first sealing structure away from the drying cylinder, and has a gas guiding channel communicating with the gas guiding channel, the gas guiding channel being bent. The heat insulation structure is located on the side of the first sealing structure opposite to the rotating shaft and is located outside the drying cylinder.

[0005] In some embodiments, the first sealing structure is provided with a spiral groove on the sidewall facing the rotating shaft, and / or the rotating shaft is provided with a spiral groove on the sidewall facing the first sealing structure.

[0006] In some embodiments, the first sealing structure includes a sealing sleeve and a fixing sleeve. The fixing sleeve passes through the mounting hole and is fixed to the drying cylinder. The sealing sleeve is located between the rotating shaft and the fixing sleeve and is fixed to the fixing sleeve.

[0007] In some embodiments, the heat insulation structure is provided with a cooling cavity and a heat insulation cavity, the heat insulation cavity being used to contain a heat insulation medium, and the cooling cavity being used to contain a cooling medium, the cooling cavity being located on the side of the heat insulation cavity away from the drying cylinder.

[0008] In some embodiments, the airflow channel includes a first flow channel section and a second flow channel section, and the airflow structure includes a first airflow member and a second airflow member. Along the axial direction of the rotating shaft, the first airflow member is located between the second airflow member and the first sealing structure. The first flow channel section is formed between the first airflow member and the rotating shaft, and the second flow channel section is formed between the first airflow member and the second airflow member. The second flow channel section is bent along the radial direction of the rotating shaft.

[0009] In some embodiments, one of the first air guide and the second air guide is provided with an air guide groove, and the other of the first air guide and the second air guide is provided with an air guide protrusion. The air guide protrusion is located in the air guide groove, and the second flow channel section is formed between the air guide protrusion and the air guide groove.

[0010] In some embodiments, the drying equipment further includes a second sealing structure located on the side of the air guiding structure away from the drying cylinder, and the second sealing structure is respectively sealed to the side wall of the rotating shaft and the side wall of the air guiding structure away from the first sealing structure along the axial direction of the rotating shaft.

[0011] In some embodiments, the second sealing structure includes a first sealing element and a second sealing element. The first sealing element is sleeved on the rotating shaft and fixed to the rotating shaft. The second sealing element is disposed around the first sealing element and is sealed to the first sealing element.

[0012] In some embodiments, the second sealing structure further includes a sealing seat and a connecting pipe. The sealing seat is sleeved on the rotating shaft, and a sealing groove is provided on the side of the sealing seat facing the rotating shaft. The second sealing member is disposed in the sealing groove, and a sealing cavity is formed between the second sealing member and the groove wall on the side of the sealing groove away from the rotating shaft. The connecting pipe is connected to the sealing cavity.

[0013] In some embodiments, the second sealing structure further includes a cooling pipe, the sealing seat is provided with a cooling channel, and the cooling pipe is connected to the cooling channel.

[0014] In some embodiments, the drying equipment further includes a fixed base, which is sleeved on the rotating shaft. The side of the fixed base near the drying cylinder is connected to the heat insulation structure. The fixed base, the heat insulation structure, the air guiding structure, the second sealing structure, and the rotating shaft together form an installation space.

[0015] In some embodiments, the rotating shaft has a guide groove along the axial direction, and a guide sleeve is provided in the guide groove, the guide sleeve and the rotating shaft forming a heat dissipation channel.

[0016] In the drying equipment provided in this application, a first sealing structure is sleeved on a rotating shaft, and an air passage connecting the first sealing structure and the rotating shaft is formed between the first sealing structure and the rotating shaft, communicating with the drying chamber. An air guiding structure is provided with an air guiding channel communicating with the air passage, and the air guiding channel is bent. A heat insulation structure is located on the side of the first sealing structure away from the rotating shaft and outside the drying cylinder. On one hand, the first sealing structure can seal the rotating shaft and the mounting hole, preventing the material to be dried from leaking through the gap between the mounting hole and the rotating shaft. Gas can be introduced into the air guiding channel and the air passage, thereby achieving an airtight seal on the rotating shaft. While providing a sealing function, it can also reduce friction between the rotating shaft and the first sealing structure, reducing the power consumption of the drying equipment. The bent design of the air guiding channel can also improve the obstruction effect of the air guiding channel on the material, effectively preventing material leakage. On the other hand, the heat insulation structure can block the heat emitted by the drying cylinder, reducing the heat conducted from the drying cylinder to the first sealing structure, thereby preventing the first sealing structure from being damaged or failing due to heat, increasing the service life of the first sealing structure, and improving the reliability of the drying equipment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a cross-sectional view of a partial structure of the drying equipment provided in the embodiments of this application.

[0019] Figure 2 yes Figure 1 Enlarged view of section I.

[0020] Key reference numerals in the drawings: Drying equipment 1000; Drying cylinder 10; Drying chamber 101; Mounting hole 1011; Rotating shaft 20; Guide groove 211; Guide sleeve 22; Heat dissipation channel 201; First sealing structure 31; Air passage 3101; Sealing sleeve 311; Spiral groove 3111; Fixing sleeve 312; Heat insulation structure 32; Cooling chamber 3201; Heat insulation chamber 3202; Inlet air passage 3203; Air guiding structure 33; Air guiding channel 330; First flow channel section 3301; Second flow channel section 3302; Third flow channel section 3303; First air guide 331; Air guide groove 3311; First air guide part 3312; Second air guide part 3313; Second air guide 332; Air guide protrusion 3321; Second sealing structure 34; First sealing element 341; Second sealing element 342; Sealing seat 343; Sealing groove 3431; Sealing cavity 3432; Connecting pipe 344; Cooling pipe 345; Fixing seat 35; Installation space 3501; Viewing window 351; Axial direction X; Radial direction Y.

[0021] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0023] In this document, references to "embodiment" or "implementation" mean that a particular feature, structure, or characteristic described in connection with an embodiment or implementation may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0024] It should be noted that the terminology in the specification, claims, and accompanying drawings of this application is for describing specific embodiments only and is not intended to limit this application. The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. The term "and / or" as used in this application refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0025] Please refer to the following: Figure 1 and Figure 2 , Figure 1This is a partial structural schematic diagram of the drying equipment 1000 provided in an embodiment of this application; Figure 2 yes Figure 1 An enlarged view of part I in this application. In the embodiments of this application, for clearer description, [the following is used]... Figure 1 For reference, in this application, the X-axis direction is defined as the axial direction of the rotating shaft 20, and the Y-axis direction is defined as the radial direction of the rotating shaft 20. The axial direction X of the rotating shaft 20 is parallel to the extension direction of the central axis of the rotating shaft 20. The axial direction X of the rotating shaft 20 is perpendicular to the radial direction Y.

[0026] The drying equipment 1000 includes a drying cylinder 10, a rotating shaft 20, a first sealing structure 31, and a heat insulation structure 32. The drying cylinder 10 has a drying chamber 101 and a mounting hole 1011 communicating with the drying chamber 101. The drying chamber 101 is used to hold the material to be dried. The rotating shaft 20 is rotatably inserted into the mounting hole 1011. A stirring paddle can be installed on the rotating shaft 20; when the rotating shaft 20 rotates, the stirring paddle agitates the material to be dried. The first sealing structure 31 is sleeved on the rotating shaft 20 and located between the inner wall of the mounting hole 1011 and the rotating shaft 20. The first sealing structure 31 seals the rotating shaft 20 and the mounting hole 1011 to prevent leakage of the material to be dried from the mounting hole 1011. The heat insulation structure 32 is located on the side of the first sealing structure 31 facing away from the rotating shaft 20 and is located outside the drying cylinder 10. The heat insulation structure 32 can block the heat emitted by the drying cylinder 10, reduce the heat conducted from the drying cylinder 10 to the first sealing structure 31, thereby preventing the first sealing structure 31 from being damaged or failing due to heat, improving the service life of the first sealing structure 31, and improving the reliability of the drying equipment 1000.

[0027] The rotating shaft 20 and the first sealing structure 31 can be connected in an airtight manner. When the drying equipment 1000 is working, blowing air into the gap between the rotating shaft 20 and the first sealing structure 31 can prevent the material to be dried from entering the gap between the rotating shaft 20 and the first sealing structure 31, thus preventing material leakage.

[0028] The first sealing structure 31 has a spiral groove 3111 on its sidewall facing the rotating shaft 20, and / or the rotating shaft 20 has a spiral groove 3111 on its sidewall facing the first sealing structure 31. When the rotating shaft 20 rotates, the material entering the spiral groove 3111 will move along the spiral groove 3111 towards the drying chamber 110 due to the relative rotational compression of the rotating shaft 20 and the first sealing structure 31, thereby pushing the material back into the drying chamber 101 and preventing material leakage. In some embodiments, when the rotating shaft 20 rotates relative to the first sealing structure 31, the gas near the rotating shaft 20 will be driven by the rotating shaft 20 to form an airflow in the spiral groove 3111 flowing towards the drying chamber 101. The blowing action of the airflow can effectively prevent the material from entering the spiral groove 3111, and even if the material enters the spiral groove 3111, the airflow can blow the material back into the drying chamber 101, thereby effectively preventing material leakage.

[0029] In this embodiment, for example, the first sealing structure 31 has a helical groove 3111 on its sidewall facing the rotating shaft 20. The helical direction of the helical groove 3111 is the same as the rotation direction of the rotating shaft 20. Viewed from the side of the drying cylinder 10 near the first sealing structure 31 towards the drying chamber 101 along the axial direction X of the rotating shaft 20, the helical direction of the helical groove 3111 is set to left-handed when the rotating shaft 20 rotates counterclockwise. Viewed from the side of the drying cylinder 10 near the first sealing structure 31 towards the drying chamber 101 along the axial direction X of the rotating shaft 20, the helical direction of the helical groove 3111 is set to right-handed when the rotating shaft 20 rotates clockwise.

[0030] In some embodiments, the rotating shaft 20 has a spiral groove 3111 on its sidewall facing the first sealing structure 31. The spiral direction of the spiral groove 3111 is opposite to the rotation direction of the rotating shaft 20. Viewed from the side of the drying cylinder 10 near the first sealing structure 31 towards the drying chamber 101 along the axial direction X of the rotating shaft 20, the spiral direction of the spiral groove 3111 is right-handed when the rotating shaft 20 rotates counterclockwise. Viewed from the side of the drying cylinder 10 near the first sealing structure 31 towards the drying chamber 101 along the axial direction X of the rotating shaft 20, the spiral direction of the spiral groove 3111 is left-handed when the rotating shaft 20 rotates clockwise. When the rotating shaft 20 rotates relative to the first sealing structure 31, the material entering the spiral groove 3111, due to its lower speed than the rotating shaft 20, will be thrown back into the drying chamber 101 by inertia, thus effectively preventing material leakage. In some embodiments, the first sealing structure 31 is provided with a spiral groove 3111 on the sidewall facing the rotating shaft 20, and the rotating shaft 20 is provided with a spiral groove 3111 on the sidewall facing the first sealing structure 31. The spiral direction of the spiral groove 3111 in the first sealing structure 31 is the same as the rotation direction of the rotating shaft 20, and the spiral direction of the spiral groove 3111 in the rotating shaft 20 is opposite to the rotation direction of the rotating shaft 20.

[0031] The first sealing structure 31 includes a sealing sleeve 311 and a fixing sleeve 312. The fixing sleeve 312 passes through the mounting hole 1011 and is fixed to the drying cylinder 10. A clearance groove is provided on the side of the fixing sleeve 312 away from the rotating shaft 20 and on the side closer to the drying cylinder 10, into which the end plate of the drying cylinder 10 extends. The sealing sleeve 311 is located between the rotating shaft 20 and the fixing sleeve 312 and is fixed to the fixing sleeve 312. A mounting groove is provided on the side of the fixing sleeve 312 closer to the rotating shaft 20, and the sealing sleeve 311 is accommodated within the mounting groove. In some embodiments, the sealing sleeve 311 and the fixing sleeve 312 are independently configured and detachably connected together, which facilitates the individual replacement and maintenance of either the sealing sleeve 311 or the fixing sleeve 312, reducing the maintenance cost of the drying equipment 1000. In some embodiments, the sealing sleeve 311 and the fixing sleeve 312 can be integrally formed to reduce the installation difficulty of the first sealing structure 31.

[0032] The heat insulation structure 32 is provided with a cooling chamber 3201 and a heat insulation chamber 3202. The heat insulation chamber 3202 is used to contain the heat insulation medium. The heat insulation medium is used to block the heat emitted by the drying cylinder 10, reduce the heat conducted to the first sealing structure 31 and the rotating shaft 20, and reduce the heat loss of the drying cylinder 10, thereby improving the drying effect of the drying cylinder 10 on the material. The cooling chamber 3201 is used to contain the cooling medium. The cooling chamber 3201 is located on the side of the heat insulation chamber 3202 away from the drying cylinder 10. The cooling medium is used to cool the heat insulation structure 32 and the first sealing structure 31 to reduce the temperature of the first sealing structure 31 and prevent it from failing due to heat. The cooling chamber 3201 can be connected to an external circulating heat dissipation structure. The cooling medium circulates in the cooling chamber 3201 and the circulating heat dissipation structure to remove heat from the heat insulation structure 32 and the first sealing structure 31, thereby preventing the temperature of the first sealing structure 31 from becoming too high. The cooling chamber 3201 and the heat insulation chamber 3202 are independently arranged and separated by a partition. In some embodiments, the heat insulation structure 32 can be integrally formed. In some embodiments, the heat insulation structure 32 can be separately arranged; for example, the heat insulation structure 32 can be assembled from multiple components. The heat insulation structure 32 and the drying cylinder 10 can be connected in a sealed manner.

[0033] The drying equipment 1000 also includes an air guiding structure 33. Along the axial direction X of the rotating shaft 20, the air guiding structure 33 is located on the side of the first sealing structure 31 away from the drying cylinder 10. An air passage 3101 communicating with the drying chamber 101 is formed between the first sealing structure 31 and the rotating shaft 20. The air guiding structure 33 is provided with an air guiding passage 330 communicating with the air passage 3101. The air guiding passage 330 is bent. The drying equipment 1000 is also used to introduce gas into the guide airflow channel 330 and the ventilation airflow channel 3101 to achieve an airtight seal on the rotating shaft 20. The introduced gas can make the air pressure in the ventilation airflow channel 3101 greater than the air pressure in the drying chamber 101, thereby reducing or preventing the material to be dried from entering the gap between the rotating shaft 20 and the first sealing structure 31, and blowing the material that enters the gap between the rotating shaft 20 and the first sealing structure 31 back into the drying chamber 101. In this way, while achieving the sealing function of the rotating shaft 20, the friction between the rotating shaft 20 and the first sealing structure 31 can be reduced, the rotational resistance of the rotating shaft 20 can be reduced, and the power consumption of the drying equipment 1000 can be reduced. When the material enters the guide airflow channel 330, the bend in the guide airflow channel 330 can also improve the blocking effect of the guide airflow channel 330 on the material, thereby effectively preventing material leakage.

[0034] The air guiding structure 33 includes a first air guiding element 331 and a second air guiding element 332. Along the axial direction X of the rotating shaft 20, the first air guiding element 331 is located between the second air guiding element 332 and the first sealing structure 31. The air guiding channel 330 includes a first flow channel section 3301 and a second flow channel section 3302 communicating with the first flow channel section 3301. The first flow channel section 3301 is formed between the first air guiding element 331 and the rotating shaft 20. The first flow channel section 3301 extends along the axial direction X of the rotating shaft 20 and communicates with the air passage 3101. The second flow channel section 3302 is formed between the first air guiding element 331 and the second air guiding element 332. The second flow channel section 3302 is bent along the radial direction Y of the rotating shaft 20. The first flow channel section 3301 and the second flow channel section 3302 form a meandering flow channel, which enables the air-guiding structure 33 to achieve an air seal with the rotating shaft 20. This allows the air-guiding structure 33 to block the material entering the air-guiding flow channel 330, improve the sealing effect between the rotating shaft 20 and the drying cylinder 10, and avoid material leakage.

[0035] The second flow channel section 3302 may include multiple interconnected sub-flow channel sections, at least two of which extend in different directions, so that the second flow channel section 3302 is arranged in a bent manner. The number of sub-flow channel sections can be specifically set according to actual needs, and is not specifically limited in this application. For example, the number of sub-flow channel sections can be 2, 3, 4, 5, etc. In some embodiments, the flow area of ​​different sub-flow channel sections can be set to be different, so that the second flow channel section 3302 forms a labyrinth channel, improving the sealing effect of the air guiding structure 33 at the corresponding second flow channel section 3302.

[0036] One of the first air guide member 331 and the second air guide member 332 is provided with an air guide groove 3311, and the other of the first air guide member 331 and the second air guide member 332 is provided with an air guide protrusion 3321. The air guide protrusion 3321 is located within the air guide groove 3311. A second flow channel section 3302 is formed between the air guide protrusion 3321 and the air guide groove 3311. Exemplarily, in this embodiment, the first air guide member 331 is provided with an air guide groove 3311, and the second air guide member 332 is provided with an air guide protrusion 3321. The air guide groove 3311 and the air guide protrusion 3321 can extend along the axial direction X of the rotating shaft 20, respectively. A sub-flow channel section extending along the radial direction Y of the rotating shaft 20 and a sub-flow channel section extending along the axial direction X of the rotating shaft 20 are formed between the first air guide member 331 and the second air guide member 332. The number of air guide grooves 3311 can be set to one, or the number of air guide grooves 3311 can be set to multiple. Multiple air guide grooves 3311 can be spaced apart along the radial direction Y of the rotating shaft 20. The number of air guide protrusions 3321 corresponds to the number of air guide grooves 3311.

[0037] In some embodiments, the heat insulation structure 32 is provided with an air inlet channel 3203 that communicates with the air guide channel 330. The air inlet channel 3203 is used to connect to an air source, which supplies air to the air guide channel 330 through the air inlet channel 3203. The air guide channel 330 further includes a third flow channel section 3303 connected between the second flow channel section 3302 and the air inlet channel 3203.

[0038] The first air guide 331 includes a first air guide portion 3312 and a second air guide portion 3313. The first air guide portion 3312 is disposed on the side of the second air guide portion 3313 near the drying cylinder 10 along the axial direction X of the rotating shaft 20. The first air guide portion 3312 is located between the heat insulation structure 32 and the rotating shaft 20. The side of the first air guide portion 3312 away from the second air guide portion 3313 can be sealed and fitted with the fixing sleeve 312 of the first sealing structure 31. The side of the second air guide portion 3313 facing the drying cylinder 10 can be sealed and fitted with the side of the heat insulation structure 32 away from the drying cylinder 10. A third flow channel section 3303 can be disposed in the second air guide portion 3313. The second air guide 332 is located between the rotating shaft and the second air guide portion 3313.

[0039] The drying equipment 1000 also includes a second sealing structure 34. Along the axial direction X of the rotating shaft 20, the second sealing structure 34 is located on the side of the gas guiding structure 33 away from the drying cylinder 10. The second sealing structure 34 is sealingly connected to the side wall of the rotating shaft 20 and the side wall of the gas guiding structure 33 away from the first sealing structure 31 along the axial direction X of the rotating shaft 20, respectively. The second sealing structure 34 is used to seal the side of the gas guiding structure 33 away from the first sealing structure 31, so that the gas entering the gas guiding structure 33 flows towards the first sealing structure 31, and improves the sealing effect between the rotating shaft 20 and the drying cylinder 10, preventing material leakage to other parts of the rotating shaft 20.

[0040] The second sealing structure 34 includes a first sealing element 341 and a second sealing element 342. The first sealing element 341 is sleeved on the rotating shaft 20 and fixed to the rotating shaft 20. The second sealing element 342 is arranged around the first sealing element 341 and is sealed to the first sealing element 341. The first sealing element 341 and the second sealing element 342 are dynamically sealed, with the first sealing element 341 being a moving ring and the second sealing element 342 being a stationary ring.

[0041] The second sealing structure 34 also includes a sealing seat 343 and a connecting pipe 344. The sealing seat 343 is sleeved on the rotating shaft 20. The sealing seat 343 is in sealed contact with the first air guide 331. A sealing groove 3431 is provided on the side of the sealing seat 343 facing the rotating shaft 20. The second sealing element 342 is disposed in the sealing groove 3431. A sealing cavity 3432 is formed between the second sealing element 342 and the groove wall of the sealing groove 3431 on the side away from the rotating shaft 20. The connecting pipe 344 is connected to the sealing cavity 3432. The connecting pipe 344 is used to connect to a gas source and to supply gas to the sealing cavity 3432. The second sealing element 342 achieves a dynamic seal with the first sealing element 341 under the pressure of the gas.

[0042] In some embodiments, the second sealing structure 34 further includes a cooling pipe 345. The sealing seat 343 is provided with a cooling channel, and the cooling pipe 345 is connected to the cooling channel. The cooling pipe 345 is used to introduce a cooling medium into the cooling channel to dissipate heat from the first seal 341, the second seal 342, the sealing seat 343, and the rotating shaft 20. This prevents excessive temperature caused by friction when the first seal 341 and the second seal 342 rotate relative to each other, thereby preventing sealing failure between the first seal 341 and the second seal 342 and improving the reliability of the second sealing structure 34.

[0043] The drying equipment 1000 also includes a fixed base 35. The fixed base 35 is sleeved on the rotating shaft 20. The side of the fixed base 35 closest to the drying cylinder 10 is connected to the heat insulation structure 32. The fixed base 35, the heat insulation structure 32, the air guiding structure 33, the second sealing structure 34, and the rotating shaft 20 enclose an installation space 3501. In some cases, when the first sealing structure 31 and the second sealing structure 34 experience sealing failure (e.g., due to fatigue aging), the installation space 3501 can serve as a buffer space to buffer leaked material. When the drying equipment 1000 needs to operate without stopping, it can complete the current task before stopping for maintenance, avoiding the problem of immediate shutdown due to sealing failure and greatly improving the reliability of the drying equipment 1000.

[0044] In some embodiments, the mounting base 35 is provided with a viewing window 351 communicating with the installation space 3501. The viewing window 351 allows for easy observation of whether any material is leaking in the installation space 3501, facilitating timely shutdown and maintenance of the drying equipment 1000 in case of leakage, and also facilitating inspection and maintenance of the second sealing structure 34, the air guiding structure 33, and the heat insulation structure 32, as well as the removal of leaked material. In some embodiments, the mounting base 35 may be integrally formed. In some embodiments, the mounting base 35 may be modular, for example, it may be assembled from multiple components.

[0045] In some embodiments, the drying apparatus 1000 further includes a flow guide sleeve 22. A flow guide groove 211 is formed on the rotating shaft 20 along the axial direction X. The flow guide sleeve 22 is disposed within the flow guide groove 211. A heat dissipation channel 201 is formed between the flow guide sleeve 22 and the rotating shaft 20. The heat dissipation channel 201 is used to contain a cooling medium, which is used to cool the rotating shaft 20. The cooling medium may include, but is not limited to, a liquid; or it may be a gas. For example, the cooling medium may be water, oil, etc.

[0046] The guide channel 211 extends from the end of the rotating shaft 20 toward the drying cylinder 10. Along the axial direction of the rotating shaft 20, the guide channel 211 is located outside the drying chamber 101 to reduce heat loss within the drying chamber 101. Along the axial direction X of the rotating shaft 20, the guide channel 211 extends to the positions of the rotating shaft 20 corresponding to the first sealing structure 31, the air guiding structure 33, the second sealing structure 34, and the fixing seat 35, to fully dissipate heat from the first sealing structure 31 and the second sealing structure 34, preventing them from failing due to heat and sealing failure. This ensures that the first sealing structure 31 and the second sealing structure 34 form a long-term reliable sealing connection with the rotating shaft 20, improving the reliability of the drying equipment 100.

[0047] In some embodiments, the drying apparatus 1000 further includes a heating structure. The heating structure is used to heat the drying cylinder 10 to accelerate the drying rate of the material to be dried.

[0048] In this embodiment, based on the first sealing structure 31, the air guiding structure 33, the second sealing structure 34, the heat insulation structure 32, the flow guiding groove 211 and the flow guiding sleeve 22 disposed on the rotating shaft 20, multiple sealing structures and multiple heat dissipation structures are formed between the rotating shaft 20 and the drying cylinder 10. This can effectively seal the space between the rotating shaft 20 and the drying cylinder 10 and dissipate heat from the rotating shaft 20, effectively avoiding the problem of sealing failure between the rotating shaft 20 and the drying cylinder 10 due to heat, and greatly improving the reliability of the drying equipment 100.

[0049] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A drying apparatus (1000), characterized in that, include: A drying cylinder (10) is provided with a drying chamber (101) and a mounting hole (1011) communicating with the drying chamber (101); A rotating shaft (20) is rotatably inserted into the mounting hole (1011); A first sealing structure (31) is sleeved on the rotating shaft (20) and located between the inner wall of the mounting hole (1011) and the rotating shaft (20). An air passage (3101) communicating with the drying chamber (101) is formed between the first sealing structure (31) and the rotating shaft (20). A gas guiding structure (33) is provided on the side of the first sealing structure (31) away from the drying cylinder (10). The gas guiding structure (33) is provided with a gas guiding channel (330) communicating with the air passage (3101). The gas guiding channel (330) is bent. A heat insulation structure (32) is disposed on the side of the first sealing structure (31) away from the rotating shaft (20) and located outside the drying cylinder (10).

2. The drying equipment (1000) according to claim 1, characterized in that, The first sealing structure (31) has a spiral groove (3111) on the side wall facing the rotating shaft (20), and / or the rotating shaft (20) has a spiral groove (3111) on the side wall facing the first sealing structure (31).

3. The drying equipment (1000) according to claim 1, characterized in that, The first sealing structure (31) includes a sealing sleeve (311) and a fixing sleeve (312). The fixing sleeve (312) passes through the mounting hole (1011) and is fixed to the drying cylinder (10). The sealing sleeve (311) is located between the rotating shaft (20) and the fixing sleeve (312) and is fixed to the fixing sleeve (312).

4. The drying equipment (1000) according to claim 1, characterized in that, The heat insulation structure (32) is provided with a cooling cavity (3201) and a heat insulation cavity (3202). The heat insulation cavity (3202) is used to contain the heat insulation medium, and the cooling cavity (3201) is used to contain the cooling medium. The cooling cavity (3201) is located on the side of the heat insulation cavity (3202) away from the drying cylinder (10).

5. The drying equipment (1000) according to claim 1, characterized in that, The airflow channel (330) includes a first flow channel section (3301) and a second flow channel section (3302). The airflow structure (33) includes a first airflow guide (331) and a second airflow guide (332). Along the axial direction (X) of the rotating shaft (20), the first airflow guide (331) is located between the second airflow guide (332) and the first sealing structure (31). The first flow channel section (3301) is formed between the first airflow guide (331) and the rotating shaft (20). The second flow channel section (3302) is formed between the first airflow guide (331) and the second airflow guide (332). The second flow channel section (3302) is bent along the radial direction (Y) of the rotating shaft (20).

6. The drying equipment (1000) according to claim 5, characterized in that, One of the first air guide (331) and the second air guide (332) is provided with an air guide groove (3311), and the other of the first air guide (331) and the second air guide (332) is provided with an air guide protrusion (3321). The air guide protrusion (3321) is located in the air guide groove (3311), and the second flow channel section (3302) is formed between the air guide protrusion (3321) and the air guide groove (3311).

7. The drying equipment (1000) according to claim 1, characterized in that, The drying equipment (1000) further includes a second sealing structure (34), which is located on the side of the air guiding structure (33) away from the drying cylinder (10). The second sealing structure (34) is sealed to the side wall of the rotating shaft (20) and the side wall of the air guiding structure (33) away from the first sealing structure (31) along the axial direction (X) of the rotating shaft (20).

8. The drying apparatus (1000) according to claim 7, characterized in that, The second sealing structure (34) includes a first sealing element (341) and a second sealing element (342). The first sealing element (341) is sleeved on the rotating shaft (20) and fixed to the rotating shaft (20). The second sealing element (342) is arranged around the first sealing element (341) and is sealed to the first sealing element (341).

9. The drying apparatus (1000) according to claim 8, characterized in that, The second sealing structure (34) further includes a sealing seat (343) and a connecting pipe (344). The sealing seat (343) is sleeved on the rotating shaft (20). A sealing groove (3431) is provided on the side of the sealing seat (343) facing the rotating shaft (20). The second sealing element (342) is disposed in the sealing groove (3431). A sealing cavity (3432) is formed between the second sealing element (342) and the groove wall of the sealing groove (3431) on the side away from the rotating shaft (20). The connecting pipe (344) is connected to the sealing cavity (3432).

10. The drying apparatus (1000) according to claim 9, characterized in that, The second sealing structure (34) further includes a cooling pipe (345), the sealing seat (343) is provided with a cooling channel, and the cooling pipe (345) is connected to the cooling channel.

11. The drying apparatus (1000) according to claim 7, characterized in that, The drying equipment (1000) also includes a fixed seat (35), which is sleeved on the rotating shaft (20). The side of the fixed seat (35) near the drying cylinder (10) is connected to the heat insulation structure (32). The fixed seat (35), the heat insulation structure (32), the air guiding structure (33), the second sealing structure (34), and the rotating shaft (20) enclose an installation space (3501).

12. The drying equipment (1000) according to claim 1, characterized in that, The rotating shaft (20) has a flow guide groove (211) along the axial direction (X), and a flow guide sleeve (22) is provided in the flow guide groove (211). The flow guide sleeve (22) and the rotating shaft (20) form a heat dissipation channel (201).

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