Supporting and reinforcing structure of dryer cylinder
By designing a sliding third support plate and limiting structure on the dryer cylinder, the stress problem at the welding point caused by the difference in thermal expansion between the cylinder and the reinforcing ring was solved, thus achieving stable operation and extended service life of the dryer.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2026-04-03
AI Technical Summary
In large dryers, the difference in thermal expansion between the cylinder and the reinforcing ring can lead to excessive thermal stress at the welded joints, making them prone to weld breakage and cracking, which affects the stability and lifespan of the equipment.
Design a support and reinforcement structure including a sliding third support plate and a limiting member, allowing the reinforcing ring to move axially to release thermal expansion stress, and enhancing the stability and stiffness of the cylinder through multiple support plates and ribs.
This effectively avoids weld cracking and tearing at the welded parts, improves the operational stability and service life of the dryer, and enhances the reliability and load-bearing capacity of the cylinder under high temperature and heavy load conditions.
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Figure CN224080706U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of industrial drying equipment, and in particular relates to a support and reinforcement structure for the dryer cylinder. Background Technology
[0002] Industrial dryers, as a common material drying equipment, are widely used in industries such as food, feed, chemical, pharmaceutical, and mining for drying large quantities of materials. In the dryer's structure, the drum is one of the core components, and its stability and reliability are crucial. Because the dryer needs to bear a large amount of material and rotate continuously during operation, while also withstanding the effects of high-temperature environments, the drum structure must be sufficiently robust. This necessitates effective reinforcement measures to ensure the smooth operation of the entire drying process and extend the equipment's service life.
[0003] Currently, the common method for reinforcing the drum of a dryer mainly involves setting a reinforcing ring on the outside of the drum. The two ends of the reinforcing ring are welded to the drum to enhance its rigidity. This structure, with a reinforcing ring and welded ends, can basically meet the requirements of small dryers and has certain advantages in processing costs.
[0004] However, its application in large-scale dryers presents numerous problems. Due to the significant temperature difference between the reinforcing ring and the drum during operation, their thermal expansion varies, resulting in substantial thermal stress at the weld joint. This thermal stress easily leads to weld cracking and breakage at the weld between the reinforcing ring and the drum, severely impacting the normal operation and service life of the dryer. Utility Model Content
[0005] This utility model aims to at least partially solve one of the technical problems in the related art.
[0006] Therefore, one aspect of this application proposes a support and reinforcement structure for a dryer cylinder, comprising:
[0007] A reinforcing ring is used to be fitted around the outer perimeter of the cylinder body;
[0008] A support plate assembly is used to be fitted around the periphery of the cylinder body and located within the reinforcing ring; the support plate assembly includes:
[0009] The first support plate is used for welding connection with the cylinder body; one end of the reinforcing ring is welded to the first support plate.
[0010] The second support plate is used for welding connection with the cylinder body;
[0011] The third support plate, the end of the reinforcing ring furthest from the first support plate is welded to the third support plate;
[0012] The third support plate is slidably sleeved around the second support plate, so that the third support plate can move axially relative to the second support plate in the cylinder body.
[0013] In the technical solution, the structure is designed so that the third support plate can be slidably fitted around the second support plate, allowing the third support plate, which is fixedly connected to the reinforcing ring, to have relative displacement with the second support plate in the axial direction. This effectively releases the thermal expansion stress caused by temperature difference, avoids weld cracking and tearing between the reinforcing ring and the cylinder body due to thermal expansion differences, and significantly improves the operational stability and service life of the dryer. On the other hand, it ensures that both ends of the reinforcing ring can effectively support and reinforce the cylinder body through the support plates, enhancing the stability and reliability of the dryer cylinder under high temperature and heavy load conditions.
[0014] In some embodiments, the outer circumference of the second support plate is in contact with the inner circumference of the third support plate.
[0015] In the technical solution, the structural design increases the contact area between the second and third support plates by ensuring complete fit around the perimeter, resulting in a more uniform stress distribution, effectively reducing local stress concentration, further improving the load-bearing capacity and stability of the structure, and reducing the risk of deformation and damage caused by stress concentration.
[0016] In some embodiments, the support plate assembly further includes:
[0017] A limiting member is disposed between the second support plate and the third support plate; the outer surface of the second support plate is provided with an inner limiting groove, and the inner surface of the third support plate is provided with an outer limiting groove; the two sides of the limiting member are respectively located in the inner limiting groove and the outer limiting groove to restrict the rotation of the third support plate relative to the cylinder body; the limiting member is disposed in a direction parallel to the axis of the cylinder body.
[0018] In the technical solution, the structural design uses limiting components to restrict the rotation of the third support plate relative to the cylinder body while allowing it to slide in the axial direction. This ensures that the structure can freely compensate for thermal expansion in the axial direction while maintaining radial stability and coaxiality, preventing malfunctions and safety hazards caused by rotational loosening.
[0019] In some embodiments, the outer surface of the second support plate and the inner surface of the third support plate are spaced apart in the radial direction of the cylinder body.
[0020] In the technical solution, the structural design facilitates assembly and also leaves room for radial thermal expansion, avoiding stress concentration caused by assembly interference or excessive constraints; on the other hand, the spacing helps air circulation, which is beneficial for heat dissipation of the structure in high-temperature environments and improves the service life of components.
[0021] In some embodiments, the limiting member is cylindrical, and both the inner limiting groove and the outer limiting groove are arc-shaped and cooperate with the limiting member.
[0022] In the technical solution, the structural design ensures that the limiting component slides smoothly in the groove with high limiting accuracy, effectively preventing the rotation and axial movement of the third support plate, improving the stability and reliability of the structure. At the same time, the cooperation between the arc-shaped groove and the limiting component can disperse stress, reduce local wear, and extend service life.
[0023] In some embodiments, the support plate assembly further includes:
[0024] The fourth support plate has multiple limiting components arranged around the periphery of the cylinder body, and all the limiting components are connected to the fourth support plate.
[0025] In the technical solution, this structural design makes the support plate assembly form a more integrated structure, improving the rigidity and stability of the entire assembly.
[0026] In some embodiments, multiple limiting members are arranged at equal intervals in the circumferential direction.
[0027] In the technical solution, the structural design uses limiting components to ensure that the third support plate is subjected to uniform force in the circumferential direction, avoiding deformation and damage caused by excessive local force, and ensuring the balance and stability of the structure during rotation. On the other hand, the spacing between the limiting components helps air circulation, which is beneficial to heat dissipation of the structure in high-temperature environments and improves the service life of the components.
[0028] In some embodiments, the fourth support plate is used for welding connection with the cylinder body; the third support plate and the fourth support plate are spaced apart in the axial direction of the cylinder body.
[0029] In the technical solution, the structural design further enhances the connection strength between the support plate assembly and the cylinder body by welding the fourth support plate to the cylinder body, so that the entire support reinforcement structure can better withstand various loads and ensure the stable operation of the dryer cylinder body; on the other hand, it ensures the space for axial displacement of the third support plate and avoids the displacement caused by the fourth support plate restricting the compensation of thermal expansion.
[0030] In some embodiments, the axial distance between the fourth support plate and the second support plate in the cylinder body is A, and the axial distance between the fourth support plate and the third support plate in the cylinder body is B, where A > B.
[0031] In the technical solution, the structural design allows for a larger spacing between the support plates, which is beneficial for heat dissipation. To a certain extent, the support plates can be staggered axially, resulting in a more uniform stress distribution, reducing local stress concentration, improving the load-bearing capacity and fatigue life of the structure, and also improving the stability and reliability of the entire support reinforcement structure.
[0032] In some embodiments, it further includes:
[0033] Ribs are used to be installed on the cylinder body; multiple ribs are installed around the perimeter of the cylinder body, and multiple ribs are connected to the first support plate.
[0034] In the technical solution, the structural design makes the stiffening plate and the support plate together form a reinforcing rib structure, which significantly improves the overall rigidity and bending and torsional resistance of the cylinder, enhances the stability and reliability of the cylinder when subjected to various loads, effectively prevents cylinder deformation, and ensures the normal operation accuracy and service life of the dryer.
[0035] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0036] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:
[0037] Figure 1 This is a perspective view of the support and reinforcement structure of the dryer cylinder according to an embodiment of this application;
[0038] Figure 2 This is a side view of the support and reinforcement structure of the dryer drum according to an embodiment of this application;
[0039] Figure 3 This is a cross-sectional view of the support and reinforcement structure of the dryer cylinder according to an embodiment of this application;
[0040] Figure 4 This is a partially enlarged cross-sectional view of the support and reinforcement structure of the dryer drum according to an embodiment of this application;
[0041] Figure 5 This is a cross-sectional view of the support reinforcement structure of the dryer cylinder according to an embodiment of this application;
[0042] Figure 6 This is a partially enlarged cross-sectional view of the support reinforcement structure of the dryer cylinder according to an embodiment of this application.
[0043] In the picture:
[0044] 100. Cylinder body; 200. Reinforcing ring; 300. Support plate assembly; 301. First support plate; 302. Second support plate; 303. Third support plate; 304. Fourth support plate; 305. Limiting component; 306. Inner limiting groove; 307. Outer limiting groove; 400. Rib plate. Detailed Implementation
[0045] The technical solutions in the embodiments of this utility model 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 utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0046] In the description of this utility model, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0047] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.
[0048] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0049] The dryer includes a drum body 100, a support device, a transmission device, and feeding and discharging devices. The drum body 100, typically cylindrical, is the core component of the dryer, used to contain and support the material to be dried. The drum body 100 is generally made of metal and has internal lifting plates and other devices to promote material agitation and drying. The drum body 100 is mounted on the frame via support devices (such as support rings or rolling rings) and connected to a drive device via a transmission device (such as gears, belts, or sprockets), thus rotating under the drive of the drive device. During operation, the drum body 100 carries the material and rotates continuously in a high-temperature environment, ensuring that the material is evenly heated, agitated, and dried inside the drum. Simultaneously, the support device and transmission device ensure the stable operation of the drum.
[0050] like Figures 1 to 2 As shown, in one schematic embodiment of the support and reinforcement structure of the dryer cylinder of this utility model, the support and reinforcement structure of the dryer cylinder includes a reinforcing ring 200 and a support plate assembly 300.
[0051] The reinforcing ring 200 is cylindrical and is fitted around the outer periphery of the cylindrical body 100, allowing the cylindrical body 100 to pass through the reinforcing ring 200. The support plate assembly 300 is fitted around the outer periphery of the cylindrical body 100 and located inside the reinforcing ring 200, such that the support plate assembly 300 is located in the annular space between the inner wall of the reinforcing ring 200 and the outer wall of the cylindrical body 100.
[0052] See Figure 3 The support plate assembly 300 includes a first support plate 301, a second support plate 302, and a third support plate 303. All three support plates are annular, thus fitting around the periphery of the cylindrical body 100. The inner surface of the first support plate 301 is welded to the outer wall of the cylindrical body 100. The inner wall of one end of the reinforcing ring 200 is welded to the outer surface of the first support plate 301. The inner surface of the second support plate 302 is welded to the outer wall of the cylindrical body 100. The inner wall of the reinforcing ring 200 at the end furthest from the first support plate 301 is welded to the outer surface of the third support plate 303. The third support plate 303 is slidably fitted around the periphery of the second support plate 302.
[0053] In the prior art, the cylinder body 100 is fitted with two support plates and a reinforcing ring 200. Both support plates are located inside the reinforcing ring 200 and are welded to the cylinder body 100. The two ends of the reinforcing ring 200 are welded to the two support plates respectively. During operation, the inner cylinder body 100 has a higher temperature, while the outer reinforcing ring 200 has a lower temperature. This results in a larger axial deformation of the cylinder body 100 due to thermal expansion, while the reinforcing ring 200 experiences a smaller axial deformation. More specifically, this leads to a greater increase in the axial distance between the two support plates, while the heated side length of the reinforcing ring 200 is relatively small and cannot match the change in the distance between the support plates. This causes significant thermal stress at the welded joint between the support plates and the reinforcing ring 200. This thermal stress exerts tension on the welded joint, causing weld cracking and tearing at the weld between the reinforcing ring 200 and the cylinder body.
[0054] The structural design of this application results in a higher temperature for the cylinder body 100 than for the reinforcing ring 200. Under the influence of thermal expansion, the distance between the first support plate 301 and the second support plate 302 is significantly greater than the distance between the first support plate 301 and the third support plate 303. Due to the slidable fit between the third support plate 303 and the second support plate 302, the second support plate 302 can move axially relative to the third support plate 303 under the influence of thermal expansion, thereby effectively releasing the thermal expansion stress caused by the temperature difference and preventing weld cracking and tearing at the welded joints. The second support plate 302 and the third support plate 303 maintain a certain degree of relative position in the radial direction. One end of the reinforcing ring 200 can maintain radial support for the cylinder body 100 through the third and second support rings, improving the operational stability and service life of the dryer. In addition, the other end of the reinforcing ring 200 maintains radial support to the cylinder body 100 through the first support ring, so that both ends of the reinforcing ring 200 can effectively provide radial support and reinforcement to the cylinder body 100 through the support plate, thereby enhancing the stability and reliability of the dryer cylinder under high temperature and heavy load conditions.
[0055] In this application, the outer surface of the second support plate 302 is in contact with the inner surface of the third support plate 303 around its circumference. This structural design ensures complete contact between the second support plate 302 and the third support plate 303 around its circumference. The thermal expansion exerts an upward axial force on the cylindrical body 100. The relative axial movement between the second support plate 302 and the third support plate 303 is ensured through sliding contact, effectively releasing the thermal expansion stress caused by the temperature difference. The thermal expansion exerts a radial force on the cylindrical body 100, causing the cylindrical body 100 to radially press the third support plate 303 outward through the second support plate 302. Due to the large contact area between the second support plate 302 and the third support plate 303 around its circumference, the third support ring provides uniform radial support to the second support plate 302 at all positions around its circumference. The force distribution of the third support ring is uniform, and the second support plate 302 provides sufficient radial support to the cylindrical body 100, avoiding local stress concentration between the two. This further improves the load-bearing capacity and stability of the structure and reduces the risk of deformation and damage caused by stress concentration.
[0056] See also in this application. Figures 3 to 6 The support plate assembly 300 further includes a limiting member 305. The limiting member 305 is disposed between the second support plate 302 and the third support plate 303. The outer surface of the second support plate 302 is provided with an inner limiting groove 306, and the inner surface of the third support plate 303 is provided with an outer limiting groove 307. The two sides of the limiting member 305 are respectively located in the inner limiting groove 306 and the outer limiting groove 307, and the second support plate 302 is prevented from rotating relative to the third support plate 303 by the limiting member 305. The limiting member 305 is arranged in a direction parallel to the axis of the cylinder body 100.
[0057] Because the limiting member 305 is arranged axially and parallel to the relative movement direction between the second support plate 302 and the third support plate 303, the limiting member 305 does not hinder the relative movement between the second support plate 302 and the third support plate 303. When the dryer is running, the cylinder body 100 rotates. One end of the reinforcing ring 200 is fixedly connected to the cylinder body 100 via the first support plate 301. The torque generated by the rotation of the cylinder body 100 acts on the reinforcing ring 200 through the first support plate 301. Without the limiting member 305, there is no mutual constraint in the rotational direction between the second support plate 302 and the third support plate 303. This would cause the torque to be concentrated and transmitted to the reinforcing ring 200 through the first support plate 301. This would make the welded joints between the first support plate 301 and the cylinder body 100 or between the first support plate 301 and the reinforcing ring 200 prone to cracking and breakage under strong torque, thus causing the reinforcing ring 200 to loosen.
[0058] The structural design of this application achieves mutual constraint between the second support plate 302 and the third support plate 303 in the rotational direction through the limiting member 305. The torque of the rotation of the cylinder body 100 can be partially transmitted to one end of the reinforcing ring 200 through the first support plate 301, and the other part can be transmitted to the other end of the reinforcing ring 200 through the second support plate 302, the limiting member 305, and the third support plate 303. This prevents the welded parts from opening or cracking due to rotation, maintaining the stability of the reinforcing ring 200. Furthermore, the limiting member 305 can maintain the axial relative movement between the second support plate 302 and the third support plate 303, ensuring that the structure can freely compensate for thermal expansion in the axial direction.
[0059] In this application, a radial gap is provided between the outer surface of the second support plate 302 and the inner surface of the third support plate 303 in the cylindrical body 100. Under thermal expansion, the second support plate 302 undergoes radial changes, reducing the radial gap between it and the third support plate 303. This structural design makes the outer diameter of the second support plate 302 smaller than the inner diameter of the third support plate 303, allowing the second support plate 302 to more easily enter the interior of the third support plate 303 during assembly, eliminating assembly interference and facilitating assembly. Furthermore, this radial gap provides space for radial thermal expansion, preventing the third support plate 303 from obstructing the radial thermal expansion of the second support plate 302 and causing stress between them, thus maintaining structural stability. In addition, this gap facilitates airflow, allowing heat from inside the heating coil to dissipate to the outside, which is beneficial for heat dissipation in high-temperature environments and improves the service life of the components.
[0060] See also in this application. Figures 3 to 6 The limiting member 305 is cylindrical, and both the inner limiting groove 306 and the outer limiting groove 307 are arc-shaped and cooperate with the limiting member 305. This structural design makes the surface of the limiting member 305 smooth, allowing the second support plate 302 and the third support plate 303 to slide more smoothly in the grooves when they are axially connected by the limiting member 305. The limiting member 305 forms a surface contact on the arc surface through its cooperation with the limiting groove, which better forms a limiting effect in the direction of rotation, effectively preventing relative rotation between the third support plate 303 and the second support plate 302, and avoiding concentrated torque at the welded parts of the first support plate 301, which could cause the welds to break. On the other hand, the surface contact on the arc surface allows the limiting member 305 to more fully transfer and disperse the stress generated in the radial direction by thermal expansion between the second support plate 302 and the third support plate 303, avoiding stress concentration that could lead to localized wear between components and extending service life.
[0061] See also in this application. Figure 1 , Figure 3 and Figure 4 The support plate assembly 300 also includes a fourth support plate 304. Multiple limiting members 305 are arranged around the periphery of the cylindrical body 100, and all the limiting members 305 are connected to the fourth support plate 304. This structural design allows the fourth support plate 304 to radially constrain each limiting member 305, enabling the fourth support plate 304 to provide radial support to the second support plate 302 and the third support plate 303 through the limiting members 305. This makes the support plate assembly 300 a more integrated structure, further improving the structural strength of the entire assembly and the stability of its support for the cylindrical body 100.
[0062] See also in this application. Figure 5 Multiple limiting members 305 are evenly spaced along the circumference. This structural design ensures that the limiting members 305 are evenly distributed, thereby more evenly transmitting the radial and rotational forces between the second support plate 302 and the third support plate 303. This allows the reinforcing ring 200 to more evenly support the cylindrical body 100 radially, and the reinforcing ring 200 to rotate more evenly with the cylindrical body 100 under torque, avoiding deformation and damage caused by excessive local stress, and ensuring the balance and stability of the structure during rotation. In addition, the spacing between adjacent limiting members 305 also facilitates air circulation, which is beneficial for heat dissipation in high-temperature environments and improves the service life of the components.
[0063] See also in this application. Figure 1 The fourth support plate 304 is welded to the cylinder body 100. (See also...) Figures 3 to 4 A gap is provided axially between the third support plate 303 and the fourth support plate 304 on the cylinder body 100. This structural design, through the welded connection of the fourth support plate 304 to the cylinder body 100, further enhances the reinforced support structure on the cylinder body 100. It also allows the fourth support plate 304 to mutually support the second support plate 302 and the third support plate 303 via the limiting member 305, enabling the entire reinforced support structure to better withstand various loads and ensuring the stable operation of the dryer cylinder. Furthermore, this gap ensures space for the axial displacement of the third support plate 303, preventing the fourth support plate 304 from restricting displacement caused by thermal expansion.
[0064] See also in this application. Figure 4The axial distance between the fourth support plate 304 and the second support plate 302 in the cylindrical body 100 is A, and the axial distance between the fourth support plate 304 and the third support plate 303 in the cylindrical body 100 is B, where A > B. This structural design allows for a larger gap between the second support plate 302 and the fourth support plate 304, providing more space for air circulation within the reinforced structure, as internal heat dissipates outwards. Furthermore, by offsetting the second support plate 302 and the third support plate 303 axially to some extent, the radial thermal expansion of the cylindrical body 100 can be transferred to the third support plate 303 through the second support plate 302 and the fourth support plate 304 respectively, resulting in a more uniform stress distribution, reduced local stress concentration, improved load-bearing capacity and fatigue life, and also enhanced stability and reliability of the entire reinforced structure.
[0065] See also in this application. Figures 1 to 4 The supporting and reinforcing structure also includes ribs 400. Ribs 400 are disposed on the cylinder body 100. Multiple ribs are arranged around the perimeter of the cylinder body 100, and all ribs are connected to the first support plate 301. This structural design ensures that the ribs not only reinforce the cylinder body 100 but also the first support plate 301, forming a two-way rib structure. This significantly improves the overall rigidity and bending / torsional resistance of the cylinder, enhances its stability and reliability under various loads, effectively prevents cylinder deformation, and ensures the normal operating accuracy and service life of the dryer.
[0066] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0067] The above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.
Claims
1. A support reinforcement structure for a dryer drum, characterized by, The application relates to a reinforcing ring, a support plate assembly and a rib plate. The reinforcing ring is arranged on the periphery of a cylinder body. The support plate assembly is arranged on the periphery of the cylinder body and is located in the reinforcing ring. The first support plate is welded to the cylinder body. The second support plate is welded to the cylinder body. The third support plate is welded to the cylinder body. The third support plate is slidably arranged on the periphery of the second support plate, so that the third support plate can move in the axial direction of the cylinder body relative to the second support plate.
2. The support reinforcement structure for a dryer drum according to claim 1, characterized in that, The outer surface of the second support plate is in contact with the inner surface of the third support plate.
3. The support reinforcement structure for a dryer drum according to claim 1, characterized in that, The support plate assembly further comprises a limiting piece arranged between the second support plate and the third support plate. The outer surface of the second support plate is provided with an inner limiting groove, and the inner surface of the third support plate is provided with an outer limiting groove.
4. The support reinforcement structure for a dryer drum according to claim 3, characterized in that, The limiting piece is arranged in the axial direction of the cylinder body.
5. A support and reinforcement structure for a dryer drum according to claim 3 or 4, characterized in that, The limiting piece is in the form of a cylinder, and the inner limiting groove and the outer limiting groove are in the form of arcs matched with the limiting piece.
6. The support reinforcement structure for a dryer drum according to claim 3, characterized in that, The support plate assembly further comprises a fourth support plate. The limiting piece is arranged around the periphery of the cylinder body.
7. The support reinforcement structure for a dryer drum according to claim 6, characterized in that, The limiting piece is arranged in the circumferential direction.
8. A support and reinforcement structure for a dryer drum according to claim 6 or 7, characterized in that, The fourth support plate is welded to the cylinder body.
9. The support reinforcement structure for a dryer drum according to claim 8, characterized in that, The distance between the fourth support plate and the second support plate in the axial direction of the cylinder body is A, and the distance between the fourth support plate and the third support plate in the axial direction of the cylinder body is B, A > B.
10. The support reinforcement structure for a dryer drum according to claim 1, characterized in that, The rib plate is arranged on the cylinder body. The rib plate is arranged around the periphery of the cylinder body.