An electrically heated roll

Abstract

This utility model discloses an electrically heated roller, which includes a roller body, a temperature equalization layer, and a temperature sensor. The roller body includes a roller core, a roller surface sleeved on the outer periphery of the roller core, and rotating shafts disposed at both ends of the roller core. A cavity is formed between the roller surface and the roller core. An electric heating rod is disposed on the roller core, penetrating the roller core and parallel to the rotating shaft. The electric heating rod includes multiple heating zones with individually adjustable temperatures. The temperature equalization layer is filled in the cavity. The temperature sensor is inserted into the roller surface along the axial direction of the roller body. This application has the advantages of high roller surface temperature uniformity, convenient replacement and maintenance, and cost savings.

Description

Technical Field

[0001] This utility model relates to the field of electric heating roller technology, and in particular to an electric heating roller. Background Technology

[0002] In the processing and production of flexible substrates, the substrate conveyor belt needs to undergo wrinkle removal treatment before entering the coating head for coating. Wrinkle removal is often performed by heating the conveyor belt with hot rollers, which effectively removes various types of wrinkles from the substrate surface. Additionally, the coated current collector membrane material also needs to be flattened before / after entering the drying oven to obtain a uniformly dried coating, which improves the coating appearance and enhances coating quality. Furthermore, hot rollers are widely used in composite membrane production equipment. The membrane material after adhesive coating is preheated by the hot rollers, which helps the adhesive solvent evaporate, resulting in better bonding of the composite membrane material and ensuring the quality of the membrane composite.

[0003] There are different ways to heat the roller body. The most widely used type of hot roller is the electric heating roller, which uses an electric heating rod as a heat source to heat the roller body. However, the existing electric heating roller has poor temperature control uniformity, poor heat load capacity and poor maintenance convenience, and is not suitable for product production equipment with high requirements for roller surface temperature uniformity and large load.

[0004] In view of this, the purpose of this utility model is to provide a new technical solution to solve the existing technical problems. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model provides an electric heating roller, which solves at least one of the problems of poor temperature control uniformity, poor heat load capacity and poor maintenance convenience of existing electric heating rollers.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] An electrically heated roller includes a roller body, a temperature equalization layer, and a temperature sensor. The roller body includes a roller core, a roller surface sleeved on the outer periphery of the roller core, and rotating shafts disposed at both ends of the roller core. A cavity is formed between the roller surface and the roller core. An electric heating rod is disposed on the roller core, the electric heating rod passing through the roller core and parallel to the rotating shaft, and the electric heating rod includes multiple heating zones that can be individually temperature-controlled. The temperature equalization layer is filled in the cavity. The temperature sensor is inserted into the roller surface along the axial direction of the roller body.

[0008] In the above structure, the electric heating rod includes a first heating zone, a second heating zone, and a third heating zone that can be temperature-controlled respectively, with the first heating zone and the third heating zone located at opposite ends of the second heating zone.

[0009] In the above structure, there are multiple electric heating rods, which are distributed circumferentially on the roller core.

[0010] In the above structure, the end face of the roller core is evenly provided with a plurality of circumferentially distributed heating mounting holes. The heating mounting holes extend along the axial direction of the roller core, and the electric heating rods are respectively arranged in the heating mounting holes, and the electric heating rods are detachably connected to the roller core.

[0011] In the above structure, the temperature sensor includes a first temperature sensor, a second temperature sensor, and a third temperature sensor, wherein the length of the first temperature sensor is greater than the length of the second temperature sensor, and the length of the second temperature sensor is greater than the length of the third temperature sensor.

[0012] In the above structure, three sensor mounting holes are uniformly arrayed along the circumference of the roller surface. The first temperature sensor, the second temperature sensor, and the third temperature sensor are respectively disposed in the sensor mounting holes and are threadedly connected to the corresponding sensor mounting holes.

[0013] In the above structure, the temperature equalization layer is a hollow cylindrical closed structure that fits into the cavity.

[0014] In the above structure, sealing plates are provided at both ends of the temperature equalization layer to seal the end face of the temperature equalization layer, and the periphery of the sealing plate is tightly fitted with the inner side of the roller surface.

[0015] The structure described above also includes protective covers, with two protective covers respectively covering both ends of the roller surface.

[0016] In the above structure, a wire routing channel extending along the axial direction of the rotating shaft is provided inside the rotating shaft, and a wire routing through hole communicating with the wire routing channel is provided on the side of the rotating shaft near the roller core. The wire routing through hole is at least partially located inside the protective cover.

[0017] The beneficial effects of this utility model are as follows: The electric heating roller of this application uses several electric heating rods as heat sources, and the temperature of these electric heating rods can be individually controlled in different zones. During use, the temperature of each area of ​​the roller surface can be detected in real time and controlled, thereby achieving uniformity of temperature in each area of ​​the roller surface and ensuring heating quality. The temperature sensor detects the temperature of the roller surface throughout the process, ensuring that the temperature difference of the roller surface is controlled within ±0.5℃ during operation. In addition, the electric heating roller is assembled from multiple parts, which facilitates replacement and maintenance and saves costs. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0020] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the electric heating rod of this utility model;

[0022] Figure 4 This is a schematic diagram of the roller end face structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the temperature sensor structure of this utility model.

[0024] Reference numerals: 1. Roller body; 11. Roller core; 111. Heating mounting hole; 12. Roller surface; 121. Sensor mounting hole; 13. Rotating shaft; 131. Wiring channel; 132. Wiring through hole; 14. Cavity; 2. Electric heating rod; 21. First heating zone; 22. Second heating zone; 23. Third heating zone; 3. Temperature equalization layer; 31. Sealing plate; 4. Temperature sensor; 41. First temperature sensor; 42. Second temperature sensor; 43. Third temperature sensor; 5. Protective cover. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-5 The present invention will be further described below.

[0026] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0027] Reference Figures 1 to 5An electrically heated roller can be applied to hot rolling film forming rollers, preheating rollers, drying rollers, and other roller body heating scenarios to achieve the functions of hot rolling forming, preheating, and drying. It includes a roller body 1, a temperature equalization layer 3, and a temperature sensor 4. The roller body 1 includes a roller core 11, a roller surface 12, and a rotating shaft 13. The roller surface 12 is sleeved on the outer periphery of the roller core 11, and a cavity 14 is formed between the roller core 11 and the roller surface 12. The rotating shaft 13 is fixedly set at both ends of the roller core 11 for external drive mechanism. The temperature equalization layer 3 is filled in the cavity 14. The temperature sensor 4 is inserted into the roller surface 12 along the axial direction of the roller body 1 to detect the temperature of the roller surface 12 in real time. An electric heating rod 2 is installed on the roller core 11, penetrating the roller core 11 and positioned parallel to the rotating shaft 13. The electric heating rod 2 serves as a heat source to heat the roller body 1, and the heat is evenly diffused in the temperature equalization layer 3, ensuring that the temperature of the roller body 1 is uniformly adjusted in both the axial and circumferential directions, thereby guaranteeing the temperature uniformity of the roller surface 12. The electric heating rod 2 includes multiple heating zones that can be individually temperature-controlled, allowing for temperature adjustment of each heating zone to ensure that different areas of the roller surface 12 maintain temperature uniformity.

[0028] In this embodiment, the roller core 11 and the rotating shaft 13 are made of steel with high bending strength and bending stiffness; the roller surface 12 is made of steel with good thermal conductivity, high contact strength, high stiffness and good wear resistance to ensure the surface strength of the roller and the toughness of the roller core 11. In addition, the roller core 11 is set as a solid structure to ensure that the electrically heated roller has good thermal load performance.

[0029] Reference Figures 1 to 3 Furthermore, the electric heating rod 2 includes a first heating zone 21, a second heating zone 22, and a third heating zone 23. The first heating zone 21, the second heating zone 22, and the third heating zone 23 can be temperature-controlled separately. When there is no load, the temperature at both ends of the electric heating rod 2 can be adjusted. When in use, the temperature of different heating zones can be adjusted according to the actual situation to ensure uniform heating of the entire roller surface 12.

[0030] The first heating zone 21 and the third heating zone 23 are located on both sides of the second heating zone 22, corresponding to the two ends of the roller core 11, and the second heating zone 22 corresponds to the middle of the roller core 11. Since the roller body 1 is elongated, heat loss from its ends is greater than that from the middle during use. Therefore, under no-load conditions, the temperature of different heating zones of the electric heating rod 2 can be adjusted so that the temperature at both ends of the electric heating rod 2 is higher than that in the middle section, compensating for the significant heat loss at both ends of the roller body 1 and ensuring uniform temperature of the roller surface 12. When the roller surface 12 is loaded with film, the heat carried away by the film is greater than the heat lost from both ends of the film surface, resulting in a trend where the temperature at both ends of the roller core 11 is higher than that in the middle section. At this time, the temperature at both ends of the electric heating rod 2 can be adjusted to be lower than that in the middle section to achieve uniform temperature of the roller surface 12 during operation and ensure the quality of the film. In other embodiments, the electric heating rod 2 can be configured with four, five, or more segments; this is not a specific limitation.

[0031] In this embodiment, the principle of the three-section zoned temperature control of the electric heating roller is as follows: the resistance wire in each electric heating rod 2 is set to three sections, which correspond to the first heating zone 21, the second heating zone 22 and the third heating zone 23 of the electric heating rod 2. Each section of resistance wire is connected to two wires. By controlling the voltage between the two wires, the heat generation of the section of resistance wire can be controlled. For example, if the voltage at both ends of the resistance wire section corresponding to the first temperature control zone and the third temperature control zone is adjusted to be greater than the voltage at both ends of the resistance wire section corresponding to the second temperature control zone, the temperature at both ends of the electric heating rod 2 can be higher than the temperature in the middle.

[0032] Reference Figures 2 to 4 Furthermore, there are multiple electric heating rods 2, which are circumferentially distributed on the roller core 11 to uniformly provide heat to the circumference of the roller core 11. Specifically, in this embodiment, multiple circumferentially distributed heating mounting holes 111 are uniformly opened on the end face of the roller core 11. The heating mounting holes 111 extend axially along the roller core 11 and penetrate the core. The electric heating rods 2 are correspondingly arranged in the heating mounting holes 111, and the electric heating rods 2 are detachably connected to the roller core 11. The connection and fixation between the electric heating rods 2 and the roller core 11 can be achieved by common fasteners such as screws, which facilitates the installation and removal of the electric heating rods 2. The electric heating rods 2 are detachably installed on the roller core 11, which facilitates the inspection and maintenance of the electric heating roller during use. When the electric heating rods 2 reach the end of their service life, they can be pulled out and replaced with new electric heating rods 2, while the roller body 1 is still used, effectively ensuring the service life of the electric heating roller, improving its utilization rate, reducing equipment costs, and being environmentally friendly.

[0033] Reference Figures 3 to 5Furthermore, the temperature sensor 4 includes a first temperature sensor 41, a second temperature sensor 42, and a third temperature sensor 43. Three sensor mounting holes 121 are correspondingly provided on the roller surface 12, and these three mounting holes 121 are evenly arrayed along the circumference of the roller surface 12. The sensor mounting holes 121 extend axially from the right end face of the roller surface 12. The first temperature sensor 41, the second temperature sensor 42, and the third temperature sensor 43 are installed one-to-one in the three sensor mounting holes 121. The length of the first temperature sensor 41 is greater than the length of the second temperature sensor 42, and the length of the second temperature sensor 42 is greater than the length of the third temperature sensor 43. The first temperature sensor 41 can be inserted into the roller surface 12 near the left end face to measure the temperature of the roller surface 12 near the left end face in real time (corresponding to the first heating zone 21 of the electric heating rod 2); the second temperature sensor 42 can be inserted into the roller surface 12 near the middle to measure the temperature of the middle part of the roller surface 12 in real time (corresponding to the second heating zone 22 of the electric heating rod 2); and the third temperature sensor 43 can be inserted into the roller surface 12 near the right end face to measure the temperature of the right end face of the roller surface 12 in real time (corresponding to the third heating zone 23 of the electric heating rod 2).

[0034] Furthermore, to facilitate the installation, disassembly, inspection, and maintenance of the temperature sensor 4, the first temperature sensor 41, the second temperature sensor 42, and the third temperature sensor 43 are fixed with threaded connections to the corresponding sensor mounting holes 121.

[0035] By setting up a temperature sensor 4 with three temperature detection feedback segments, the temperature of each area of ​​the roller surface 12 is monitored and adjusted in real time, which effectively ensures the temperature uniformity of the roller surface 12 and controls the temperature difference of the roller surface 12 within ±0.5℃.

[0036] Furthermore, the temperature equalization layer 3 is a hollow cylindrical closed structure that cooperates with the cavity 14, allowing the temperature equalization layer 3 to form a tight fit with the roller surface 12 and the roller core 11, avoiding uneven air gaps that would affect the temperature uniformity of the roller surface 12. In addition, the temperature equalization layer 3 is made of a solid / liquid metal alloy material with high thermal conductivity and high diffusivity, which can effectively ensure temperature conduction and diffusion, further achieving temperature uniformity in all areas of the roller surface 12. The temperature equalization layer 3 itself has excellent heat diffusion performance. The heat generated by the electric heating rod 2 is not completely uniform; after passing through the temperature equalization layer 3, the axial and circumferential temperatures of the roller body 1 are regulated to be uniform, thus further improving the temperature uniformity of the roller surface 12.

[0037] Reference Figure 1 and Figure 2Furthermore, sealing plates 31 are provided at both ends of the temperature equalization layer 3 to seal the two end faces of the temperature equalization layer 3. The periphery of the sealing plate 31 is tightly fitted with the inner side of the roller surface 12, and the sealing plate 31 is made of steel with high strength, high hardness and good heat insulation performance. On the one hand, the sealing plate 31 is used to restrict the axial movement of the temperature equalization layer 3 and ensure the tight fit between the temperature equalization layer 3 and the roller surface 12 and the roller core 11; on the other hand, the sealing plates 31 with good heat insulation performance on both end faces of the temperature equalization layer 3 can effectively reduce the heat loss on both end faces of the roller core 11, which is conducive to achieving the temperature uniformity of the roller surface 12.

[0038] Reference Figure 2 The electric heating roller also includes protective covers 5, with two protective covers 5 respectively covering both ends of the roller surface 12. The protective covers 5 contain the wiring at both ends of the roller body 1, which helps protect the wiring and keeps the electric heating roller aesthetically pleasing and clean.

[0039] Reference Figure 2 Furthermore, a wiring channel 131 extending axially along the shaft 13 is provided inside the shaft 13, and a wiring through hole 132 is provided on the side of the shaft 13 near the roller core 11. The wiring through hole 132 is connected to the wiring channel 131, and the wiring through hole 132 is at least partially located inside the protective cover 5. The wiring housed in the protective cover 5 can be introduced into the wiring channel 131 through the wiring through hole 132, and then pulled out from the wiring channel 131 to connect with the external wiring.

[0040] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. An electrically heated roll characterized by: The device includes a roller body, a temperature equalization layer, and a temperature sensor. The roller body includes a roller core, a roller surface sleeved on the outer periphery of the roller core, and rotating shafts disposed at both ends of the roller core. A cavity is formed between the roller surface and the roller core. An electric heating rod is disposed on the roller core, which penetrates the roller core and is parallel to the rotating shaft. The electric heating rod includes multiple heating zones that can be individually temperature-controlled. The temperature equalization layer is filled in the cavity. The temperature sensor is inserted into the roller surface along the axial direction of the roller body.

2. The electric heating roller according to claim 1, characterized in that: The electric heating rod includes a first heating zone, a second heating zone, and a third heating zone, each with adjustable temperature. The first heating zone and the third heating zone are located at opposite ends of the second heating zone.

3. The electrically heated roller according to claim 2, characterized in that: The number of electric heating rods is multiple, and the multiple electric heating rods are distributed circumferentially on the roller core.

4. An electrically heated roller according to claim 3, characterized in that: The roller core end face is evenly provided with a plurality of circumferentially distributed heating mounting holes. The heating mounting holes extend along the roller core axial direction. The electric heating rods are respectively arranged in the heating mounting holes, and the electric heating rods are detachably connected to the roller core.

5. An electrically heated roller according to claim 1, characterized in that: The temperature sensor includes a first temperature sensor, a second temperature sensor, and a third temperature sensor. The length of the first temperature sensor is greater than the length of the second temperature sensor, and the length of the second temperature sensor is greater than the length of the third temperature sensor.

6. An electrically heated roller according to claim 5, characterized in that: The roller surface has three sensor mounting holes evenly arrayed along the circumference of the roller surface. The first temperature sensor, the second temperature sensor, and the third temperature sensor are respectively disposed in the sensor mounting holes and are threadedly connected to the corresponding sensor mounting holes.

7. An electrically heated roller according to claim 1, characterized in that: The temperature equalization layer is a hollow cylindrical closed structure that fits into the cavity.

8. An electrically heated roller according to claim 1, characterized in that: The temperature equalization layer is provided at both ends with sealing plates for sealing the end faces of the temperature equalization layer, and the periphery of the sealing plate is in close contact with the inner surface of the roller surface.

9. An electrically heated roller according to claim 1, characterized in that: It also includes protective covers, two of which are respectively placed over both ends of the roller surface.

10. An electrically heated roller according to claim 9, characterized in that: The rotating shaft has a wire routing channel extending along the axial direction of the rotating shaft, and a wire routing through hole connected to the wire routing channel is opened on the side of the rotating shaft near the roller core. The wire routing through hole is at least partially located inside the protective cover.

Images