PLC-controlled electromagnetic induction heating roller with uniform temperature technology

Abstract

The invention discloses a PLC-controlled electromagnetic induction heating roller with a uniform temperature technology, which comprises a movable roller and a fixed shaft, the movable roller coaxially sleeves the outer side of the fixed shaft, a plurality of electromagnetic modules are arranged on the fixed shaft along the axial direction in a sliding manner, and each electromagnetic module comprises an inner cylinder and a heat conduction pipe; the inner cylinder is arranged on the fixed shaft in a sliding manner, and an electromagnetic coil is mounted on the inner cylinder; the heat conduction pipe wraps the electromagnetic coil and is sleeved on the inner cylinder; heat conduction fins are arranged between the outer side of the heat conduction pipe and the movable roller; a uniform-temperature distribution mechanism is mounted between every two adjacent electromagnetic modules; through the multiple electromagnetic modules, heating can be independently controlled in a partitioned mode, and the heating area can be flexibly adjusted through movement of the electromagnetic modules; the uniform temperature distribution mechanism transfers the temperature in the heat conduction fins to the telescopic sleeve area by guiding airflow circulation, so that the temperature of the telescopic sleeve area is kept the same as that of the heat conduction fins, it is ensured that the original area of the electromagnetic module is synchronously heated, use is more flexible, and multiple heating modes can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic induction heating rollers, and specifically to a PLC-controlled electromagnetic induction heating roller with a temperature equalization technology. Background Art

[0002] In the production processes such as shaping and laminating of film rolls, a hot roller is required to continuously contact and heat the material; in actual production, the hot roller generally uses direct electric heating or uses oil as a heat transfer medium for heating; with the development of electronic technology, a hot roller using the electromagnetic induction heating method has emerged; compared with the oil heat conduction heating method, the electromagnetic induction heating has the advantages of rapid temperature rise, high energy efficiency, and uniform temperature, and can significantly improve the production efficiency and product quality.

[0003] The existing electromagnetic induction heating rollers all perform heating operations through a unified induction coil, and then collect temperature through an internal temperature sensor. When the existing electromagnetic induction heating rollers cannot independently control different regions on a roller, and in the actual process, due to the different states of the moving roller, the temperatures of various parts of the electromagnetic induction heating roller are uneven. When the temperature sensor senses that the temperature in some regions is lower than the preset value, the temperature adjustment during the heating process is also synchronized for the entire moving roller. Therefore, there is an urgent need for a PLC-controlled electromagnetic induction heating roller with a temperature equalization technology to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a PLC-controlled electromagnetic induction heating roller with a temperature equalization technology, which can effectively solve the problems existing in the above-mentioned prior art.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions: A PLC-controlled electromagnetic induction heating roller with a temperature equalization technology, including a moving roller and a fixed shaft, the moving roller is coaxially sleeved outside the fixed shaft, and a plurality of electromagnetic modules are slidably arranged on the fixed shaft along the axial direction, and each of the electromagnetic modules is controlled uniformly or individually. Each electromagnetic module includes: An inner cylinder, slidably arranged on the fixed shaft, and an electromagnetic coil is installed on the inner cylinder; A heat conduction tube, wrapping the electromagnetic coil and sleeved on the inner cylinder, and heat conduction fins are arranged between the outer side of the heat conduction tube and the moving roller; A temperature equalization distribution mechanism is installed between adjacent electromagnetic modules. The temperature equalization distribution mechanism includes a telescopic sleeve, both ends of the telescopic sleeve are respectively connected to two adjacent electromagnetic modules, and move with the two electromagnetic modules. Pulling will push the telescopic sleeve to extend or contract; and A temperature equalization cavity is arranged inside the telescopic sleeve, and the temperature equalization cavity is communicated with the spaces where the electromagnetic modules of the two electromagnetic modules are located.

[0006] Preferably, the telescopic sleeve includes: A central circular plate, located at the central position between two adjacent electromagnetic modules; Two side plates, respectively connected to two adjacent electromagnetic modules; the side plates move synchronously with the electromagnetic modules; A flexible telescopic section, arranged between the side plate and the central circular plate.

[0007] Preferably, a drainage channel is arranged inside the heat conduction fin, and a drainage pipe is inserted at one end of the heat conduction fin close to the side plate. The end of the drainage pipe far from the heat conduction fin is the output end, and the output end extends into the flexible telescopic section and is fixed by a fixing plate. The output end is bent towards the moving roller side.

[0008] Preferably, the electromagnetic module further includes a cover arranged on the side far from the uniform temperature distribution mechanism. A first air inlet channel is arranged inside the cover, and the first air inlet channel is communicated with the drainage channel. A first air outlet channel is arranged inside the side plate, and the first air outlet channel is communicated with the internal space of the flexible telescopic section; the air flow enters from the first air inlet channel, passes through the drainage channel and the drainage pipe, is conveyed from the drainage pipe to the internal space of the flexible telescopic section, and is discharged from the first air outlet channel.

[0009] Preferably, a plurality of counterweight blocks are evenly installed along the circumferential direction on the side of the flexible telescopic section facing the fixed shaft, and the counterweight blocks are configured to move radially when the flexible telescopic section extends or contracts.

[0010] Preferably, a notch is radially formed on each drainage pipe along the central circular plate, and the counterweight block is slidably installed in the notch, and the flow rate of the drainage pipe at the notch is adjusted along with the sliding of the counterweight block.

[0011] Preferably, the flexible telescopic section and the counterweight block are connected by a V-shaped connecting rod, and the V-shaped connecting rod is configured that when the counterweight block moves away from the flexible telescopic section, the opening of the V-shaped connecting rod shrinks, and when the counterweight block moves towards the flexible telescopic section, the opening of the V-shaped connecting rod expands.

[0012] Preferably, a second air inlet channel is further arranged inside the cover, and the second air inlet channel is communicated with the space between each heat conduction fin. A second air outlet channel is further arranged on the side plate, and the second air outlet channel is communicated with the space between each heat conduction fin. The air flow conveyed by the second air inlet channel enters the space between adjacent heat conduction fins and is discharged from the second air outlet channel.

[0013] Preferably, the first air inlet channel and the second air inlet channel are configured with an air inlet pipe uniformly or independently, and the first air outlet channel and the second air outlet channel are configured with an air outlet pipe uniformly or independently.

[0014] Preferably, the first intake channels and the first outlet channels of each of the electromagnetic modules are uniformly or independently configured with corresponding intake pipes or outlet pipes.

[0015] Advantageous effects: In the present invention, by slidably arranging a plurality of electromagnetic modules along the axial direction on a fixed shaft, on the one hand, each electromagnetic module can be independently controlled in zones according to requirements, and on the other hand, through the movement of the electromagnetic modules, the heating area can be flexibly adjusted according to requirements to meet the specific needs of users; In the present invention, the temperature equalizing and distributing mechanism transfers the temperature in the heat conducting fins to the telescopic sleeve area by guiding the air flow circulation, so that the temperature in the telescopic sleeve area is the same as that of the heat conducting fins. It can not only dynamically adjust the heating area by moving the electromagnetic modules, but also ensure synchronous heating of the area before the electromagnetic modules move, making it more flexible to use and capable of realizing multiple heating modes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are used to provide further understanding of the present invention, and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention.

[0017] In the drawings: Figure 1 is a schematic structural view of the electromagnetic induction heating roller of the present invention; Figure 2 is a schematic internal structural view of the electromagnetic induction heating roller of the present invention; Figure 3 is a schematic sectional structural view of the electromagnetic induction heating roller of the present invention; Figure 4 is the present invention Figure 3 schematic diagram of the air flow in area A of the present invention; Figure 5 is the present invention Figure 3 schematic diagram of the air flow in area B of the present invention; Figure 6 is a schematic structural view of one perspective of the side plate of the present invention; Figure 7 is a schematic structural view of another perspective of the side plate of the present invention; Figure 8 is a schematic internal structural view of the side plate of the present invention; Figure 9 is the present invention Figure 2 schematic diagram of area C of the present invention; Reference numerals in the figures: 1, moving roller; 2, fixed shaft; 3, rotating shaft; 41, inner cylinder; 42, heat conduction tube; 43, electromagnetic coil; 44, heat conduction fin; 45, drainage channel; 46, drainage pipe; 47, output end; 51, central circular plate; 52, side plate; 53, flexible telescopic section; 54, first air outlet channel; 55, second air outlet channel; 6, chute; 7, slider; 8, cover; 81, first air inlet channel; 82, second air inlet channel; 9, air inlet pipe; 10, air outlet pipe; 11, uniform temperature air inlet flow channel; 12, cooling air inlet flow channel; 13, counterweight; 14, notch; 15, V-shaped connecting rod; 16, inner movable rod; 17, middle movable rod; 18, outer movable rod; 19, through groove; 20, connecting rod. Specific embodiments

[0018] The embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention. The terms used in the embodiments of the present invention are only used to explain the specific embodiments of the present invention, and are not intended to limit the present invention. The embodiments of the present application will be described below with reference to the accompanying drawings.

[0019] Embodiment 1: As Figure 1 - Figure 2 shown, an electromagnetic induction heating roller with a PLC control and a uniform temperature technology includes a moving roller 1 and a fixed shaft 2. The moving roller 1 is coaxially sleeved outside the fixed shaft 2. Both sides of the moving roller 1 are connected to a rotating shaft 3, and a rotational torque is input by the rotating shaft 3 to drive the moving roller 1 to rotate. A plurality of electromagnetic modules are slidably arranged on the fixed shaft 2 along the axial direction. Each electromagnetic module is controlled by a PLC uniformly or individually. Each electromagnetic module includes an inner cylinder 41 and a heat conduction tube 42. The inner cylinder 41 is slidably arranged on the fixed shaft 2, and an electromagnetic coil 43 is installed on the inner cylinder 41. The heat conduction tube 42 wraps the electromagnetic coil 43 and is sleeved on the inner cylinder 41. A heat conduction fin 44 is arranged between the outer side of the heat conduction tube 42 and the moving roller 1. A uniform temperature distribution mechanism is installed between adjacent electromagnetic modules. The uniform temperature distribution mechanism includes a telescopic sleeve. Both ends of the telescopic sleeve are respectively connected to two adjacent electromagnetic modules and move with the two electromagnetic modules. Pulling will push the telescopic sleeve to extend or contract. And a uniform temperature cavity is arranged in the telescopic sleeve, and the uniform temperature cavity communicates with the spaces where the two electromagnetic modules are located.

[0020] Referring to Figure 2 shown, in order to maintain the stable movement of the inner cylinder 41, a plurality of chutes 6 can be arranged on the fixed shaft 2. The inner side of the inner cylinder 41 is fitted in the chute 6 through a slider 7, so as to guide the inner cylinder 41 to stably move along the preset direction of the chute 6 for position adjustment; Among them, each electromagnetic module can flexibly adjust its own position according to requirements. For the position adjustment of the electromagnetic module, it can be sleeved on the moving roller 1 after manual adjustment in advance, or an electric device can be set inside to automatically adjust the position of each electromagnetic module. The electric device includes an electric slider 7, a lead screw drive mechanism, an electric telescopic cylinder drive mechanism, etc., and can be assembled according to actual requirements. In the initial state, each electromagnetic module is in a position close to each other. Then, according to requirements, the position of each electromagnetic module can be independently adjusted. The position of each electromagnetic module can be set for independent adjustment to be suitable for heating use with different requirements. Among them, when the positions of the electromagnetic modules are adjusted, there are vacancies in the original positions of the electromagnetic modules. When uniform heating is required on the moving roller 1, at this time, through the action of the temperature equalizing distribution mechanism, the temperature equalizing cavity is communicated with the spaces where the electromagnetic modules are located through two electromagnetic modules, so that the stability in the electromagnetic modules can be directed to the temperature equalizing cavity, enabling the area where the temperature equalizing cavity is located to be heated synchronously. At the same time, through the action of the telescopic sleeve, it can adapt to the movement of the telescopic sleeve.

[0021] Reference Figure 2 As shown, the telescopic sleeve includes a central circular plate 51, two side plates 52 and a flexible telescopic section 53. The central circular plate 51 is located at the central position between two adjacent electromagnetic modules. The two side plates 52 are respectively connected to two adjacent electromagnetic modules. The side plates 52 move synchronously with the electromagnetic modules. The flexible telescopic section 53 is arranged between the side plates 52 and the central circular plate 51, and the internal space of the flexible telescopic section 53 is the temperature equalizing cavity.

[0022] When the electromagnetic modules on one side or both sides of the central circular plate 51 move, the flexible telescopic section 53 can be pulled to perform elongation or contraction actions through the corresponding side plates 52 to adjust the size of the temperature equalizing cavity.

[0023] Among them, a drainage channel 45 is arranged in the heat conducting fin 44, and a drainage pipe 46 is inserted at one end of the heat conducting fin 44 close to the side plate 52. One end of the drainage pipe 46 away from the heat conducting fin 44 is the output end 47. The output end 47 extends into the flexible telescopic section 53 and is fixed by a fixing plate. The output end 47 is bent towards the moving roller 1.

[0024] The electromagnetic module further includes a cover 8 arranged on the side away from the temperature equalizing distribution mechanism. A first air inlet channel 81 is arranged in the cover 8. The first air inlet channel 81 is communicated with the drainage channel 45. A first air outlet channel 54 is arranged in the side plate 52. The first air outlet channel 54 is communicated with the internal space of the flexible telescopic section 53. The air flow enters from the first air inlet channel 81, passes through the drainage channel 45 and the drainage pipe 46, is conveyed from the drainage pipe 46 to the internal space of the flexible telescopic section 53, and is discharged from the first air outlet channel 54.

[0025] Reference Figure 1 - Figure 8 As shown, in this embodiment, three electromagnetic modules are taken as an example: When performing uniform temperature distribution, refer to Figure 3 and Figure 4 a. An intake duct 9 and an outlet duct 10 are arranged inside the fixed shaft 2. The intake duct 9 is communicated with the first intake passage 81, and the outlet duct 10 is communicated with the first outlet passage 54. Refer to Figure 4 a for description: The circulating air flow enters from the intake duct 9, reaches the diversion channel 45 inside the heat conducting fin 44 through the first intake passage 81, directly exchanges the heat inside the heat conducting fin 44, and then outputs the hot air flow through the diversion pipe 46 from the output end 47. By using the bent setting of the output end 47, the hot air flow is guided to be directly conveyed to the side close to the moving roller 1 of the flexible telescopic section 53, then flows along the inner wall of the flexible telescopic section 53, turns back to the side plate 52, is discharged from the first outlet passage 54 of the side plate 52, and enters the outlet duct 10. Among them, the intake duct 9 and the outlet duct 10 can be connected through an external circulation pump to realize the circulation of the gas; the three electromagnetic modules can independently set the corresponding intake duct 9 and outlet duct 10 to realize independent internal temperature control, or the air flow can be circulated through the unified intake duct 9 and outlet duct 10.

[0026] When cooling: Refer to Figure 3 and Figure 4 b; A second intake passage 82 is further arranged inside the cover 8. The second intake passage 82 is communicated with the space between the heat conducting fins 44. A second outlet passage 55 is also arranged on the side plate 52. The second outlet passage 55 is communicated with the space between the heat conducting fins 44. The first intake passage 81 and the second intake passage 82 are configured with the intake duct 9 in a unified or independent manner, and the first outlet passage 54 and the second outlet passage 55 are configured with the outlet duct 10 in a unified or independent manner; The cooling air flow enters into the second intake passage 82 through the intake duct 9 and is conveyed to the space between adjacent heat conducting fins 44, and heat exchange is carried out between the heat conducting fins 44, so as to reduce the temperature of the material inside the moving roller 1 to a greater extent. The exchanged air flow passes between the heat conducting fins 44 of the side plate 52 and enters into the outlet duct 10. Here, if independent intake duct 9 and outlet duct 10 are used, an external cooling structure can be arranged to externally cool the circulating air flow for faster cooling operation.

[0027] For the uniform temperature distribution and cooling of the middle electromagnetic module, refer to Figure 3 and 5 as shown. An intake air flow channel is arranged at the middle position of the middle electromagnetic module. The intake air flow channel includes a uniform temperature intake air flow channel 11 and a cooling intake air flow channel 12; Refer to Figure 5a is a schematic diagram of the flow of a uniform-temperature distribution airflow. The airflow enters the uniform-temperature intake air flow channel 11 from the corresponding intake air duct 9, then flows along the uniform-temperature intake air flow channel 11 into the drainage channels 45 in the heat conduction fins 44 on both sides for heat exchange, and then simultaneously flows into the drainage pipes 46 from both sides of the drainage channels 45 and is output from the output end 47. Then it flows along the inner wall of the flexible telescopic section 53, turns back to the side plate 52, and is discharged from the first air outlet channel 54 of the side plate 52 and enters the air outlet duct 10; Reference Figure 5 As shown in b, it is a schematic diagram of the flow of a cooling airflow. The airflow enters the cooling intake air flow channel 12 from the corresponding intake air duct 9, then flows along the cooling intake air flow channel 12 into the space between the heat conduction fins 44 on both sides for heat exchange, and the exchanged airflow passes between the heat conduction fins 44 of the side plate 52 and enters the air outlet duct 10; For the connection between the first intake air channel 81, the second intake air channel 82 and the intake air duct 9, as well as the connection between the first intake air channel 81, the second air outlet channel 55 and the air outlet duct 10, and the connection mode between the intake air flow channel and the drainage channel 45, it can include hose connection. By pulling the hose to move, it can be ensured that the movement of each electromagnetic module is not affected; it can also be set as Figure 3 - Figure 5 As shown, taking the first intake air channel 81, the second intake air channel 82 and the intake air duct 9 as an example, the intake air duct 9 can also be set as semi-open. The developed part corresponds to the cover 8 and the inner cylinder 41. As the electromagnetic module moves, the cover 8 and the inner cylinder 41 cover and seal the remaining open areas of the intake air duct 9 except for the openings of the first intake air channel 81 and the second intake air channel 82, so as to automatically adjust the conduction position of the two according to the opening positions of the first intake air channel 81 and the second intake air channel 82. For the semi-open area, it can be extended from the initial position of the electromagnetic module in a specified direction, so as to ensure that except for the openings of the first intake air channel 81 and the second intake air channel 82, the remaining positions can only be covered by the cover 8 and the inner cylinder 41.

[0028] Embodiment 2: On the basis of Embodiment 1, referring to Figure 2 and Figure 9 As shown, this embodiment is also provided with: a plurality of counterweight blocks 13 are evenly installed along the circumferential direction on the side of the flexible telescopic section 53 facing the fixed shaft 2. The counterweight blocks 13 are configured to move radially when the flexible telescopic section 53 extends or contracts. Each drainage pipe 46 is radially provided with a notch 14 along the central circular plate 51. The counterweight blocks 13 are slidably installed in the notches 14, and the flow rate of the drainage pipe 46 at the notch 14 is adjusted as the counterweight blocks 13 slide; Based on the above, when the electromagnetic module moves in the direction away from the central circular plate 51, it will drive the flexible telescopic section 53 to stretch and unfold, and at the same time, it will drive the flexible telescopic section 53 to tend to be flattened toward the moving roller 1. Under this movement, it will drive the counterweight block 13 to move toward the moving roller 1, so that the moving counterweight block 13 will move toward the slot 14. At this time, the space between the inside of the slot and the inside of the drainage tube 46 becomes larger, and the flow rate through the drainage tube 46 increases. Conversely, when the electromagnetic module moves toward the central circular plate 51, it will drive the flexible telescopic section 53 to shrink and fold, and the counterweight block 13 moves deeper into the slot 14 under the action of its own gravity (or a reset spring can be configured according to needs). At this time, the space between the inside of the slot and the inside of the drainage tube 46 becomes smaller, and the flow rate through the drainage tube 46 decreases, and the flexible telescopic section 53 in the unfolded state is automatically adapted to perform uniform temperature distribution.

[0029] Among them, the flexible telescopic section 53 is connected to the counterweight block 13 through a V-shaped connecting rod 15, and the V-shaped connecting rod 15 is configured to open and contract as the counterweight block 13 moves away from the flexible telescopic section 53, and open and expand when the counterweight block 13 moves toward the flexible telescopic section 53, that is, a rotation connection is made at the end of the V-shaped connecting rod 15, and the two ends of the V-shaped connecting rod 15 are distributed and connected at two positions of the V-shaped connecting rod 15. When the V-shaped connecting rod 15 opens and contracts, it can synchronously assist the flexible telescopic section 53 to perform a folding operation. Similarly, when the V-shaped connecting rod 15 opens and expands, it can also assist the flexible telescopic section 53 to perform an unfolding operation. The position where the V-shaped connecting rod 15 is connected to the configuration block can be set according to needs.

[0030] Embodiment 3: On the basis of embodiment 1, a driving method of an electromagnetic module is provided in this embodiment. Taking three electromagnetic modules as an example, three coaxially sleeved movable rods are arranged inside the fixed axis 2, which are an inner movable rod 16, a middle movable rod 17 and an outer movable rod 18. A plurality of through grooves 19 are arranged circumferentially on the inner movable rod 16, the middle movable rod 17 and the outer movable rod 18. The inner movable rod 16, the middle movable rod 17 and the outer movable rod 18 are connected to the three electromagnetic modules respectively through the spaced through grooves 19 through the connecting rod 20. One end of the inner movable rod 16, the middle movable rod 17 and the outer movable rod 18 extends out of the fixed axis 2. By externally connecting a corresponding electric driving structure or a manual driving device, the corresponding electromagnetic module can be adjusted to move by pushing the corresponding movable rod. Alternatively, three side-by-side movable rods can be arranged to be connected to the three electromagnetic modules for driving.

[0031] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. For ordinary technicians in this technical field, after knowing the contents recorded in the present invention, they can make several equivalent changes and substitutions without departing from the principle of the present invention. These equivalent changes and substitutions should also be regarded as belonging to the protection scope of the present invention.

Claims

1. A PLC-controlled electromagnetic induction heating roller with uniform temperature technology, comprising a moving roller and a fixed shaft, wherein the moving roller is coaxially sleeved on the outside of the fixed shaft, characterized in that: A plurality of electromagnetic modules are slidably arranged on the fixed shaft along the axial direction, and each of the electromagnetic modules is controlled uniformly or individually, and each of the electromagnetic modules includes: An inner cylinder is slidably arranged on the fixed shaft, and an electromagnetic coil is installed on the inner cylinder; A heat-conducting pipe, which wraps the electromagnetic coil and is sleeved on the inner cylinder, and a heat-conducting fin is arranged between the outer side of the heat-conducting pipe and the moving roller; A uniform temperature distribution mechanism is installed between adjacent electromagnetic modules, and the uniform temperature distribution mechanism includes a telescopic sleeve, both ends of which are respectively connected to two adjacent electromagnetic modules and move with the two electromagnetic modules. Pulling will push the telescopic sleeve to extend or contract; and A uniform temperature chamber is arranged in the telescopic sleeve, and the uniform temperature chamber is communicated with the spaces where the electromagnetic modules of the two electromagnetic modules are located.

2. The PLC-controlled electromagnetic induction heating roller with uniform temperature technology according to claim 1, characterized in that: The telescopic sleeve comprises: A central circular plate is located at the center between two adjacent electromagnetic modules; Two side plates are respectively connected to two adjacent electromagnetic modules; the side plates move synchronously with the electromagnetic modules; The flexible telescopic section is arranged between the side plate and the central circular plate.

3. A PLC-controlled electromagnetic induction heating roller with uniform temperature technology according to claim 2, characterized in that: A drainage channel is provided in the heat conducting fin, and a drainage tube is inserted into one end of the heat conducting fin close to the side plate, the end of the drainage tube away from the heat conducting fin is the output end, the output end extends into the flexible telescopic section, and the output end is fixed by a fixing plate, and the output end is bent toward the moving roller.

4. The PLC-controlled electromagnetic induction heating roller with uniform temperature technology according to claim 3, characterized in that: The electromagnetic module also includes a cover arranged on a side away from the uniform temperature distribution mechanism, a first air inlet channel is arranged in the cover, the first air inlet channel is connected to the drainage channel, a first air outlet channel is arranged in the side panel, and the internal space of the flexible telescopic section of the first air outlet channel is connected; the air flow enters from the first air inlet channel, passes through the drainage channel and the drainage pipe, is transported from the drainage pipe to the internal space of the flexible telescopic section, and is discharged from the first air outlet channel.

5. The PLC-controlled electromagnetic induction heating roller with uniform temperature technology according to claim 3, characterized in that: The flexible telescopic section is evenly installed with a plurality of counterweights along the circumferential direction on one side facing the fixed axis, and the counterweights are configured to move along the radial direction when the flexible telescopic section is extended or contracted.

6. A PLC-controlled electromagnetic induction heating roller with temperature-uniform technology according to claim 5, characterized in that: Each of the drainage tubes is provided with a slot radially along the central circular plate, and the counterweight block is slidably installed in the slot, and the flow rate of the drainage tube at the slot is adjusted as the counterweight block slides.

7. The PLC-controlled electromagnetic induction heating roller with uniform temperature technology according to claim 5, characterized in that: The flexible telescopic section is connected to the counterweight block via a V-shaped connecting rod, and the V-shaped connecting rod is configured such that when the counterweight block moves away from the flexible telescopic section, the opening of the V-shaped connecting rod contracts, and when the counterweight block moves toward the flexible telescopic section, the opening of the V-shaped connecting rod expands.

8. The PLC-controlled electromagnetic induction heating roller with uniform temperature technology according to claim 4, characterized in that: A second air inlet channel is also provided in the cover, and the second air inlet channel is connected to the space between each of the heat-conducting fins. A second air outlet channel is also provided on the side panel, and the second air outlet channel is connected to the space between each of the heat-conducting fins. The airflow transported by the second air inlet channel enters the space between adjacent heat-conducting fins and is discharged from the second air outlet channel.

9. The PLC-controlled electromagnetic induction heating roller with uniform temperature technology according to claim 8, characterized in that: The first air inlet channel and the second air inlet channel are uniformly or independently configured with an air inlet pipe, and the first air outlet channel and the second air outlet channel are uniformly or independently configured with an air outlet pipe.

10. A PLC-controlled electromagnetic induction heating roller with uniform temperature technology according to claim 8 or 9, characterized in that: The first air inlet channel and the first air outlet channel of each electromagnetic module are uniformly or independently configured with corresponding air inlet pipes or air outlet pipes.

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