Uniform-temperature electromagnetic heating roller

Abstract

The utility model discloses a uniform-temperature electromagnetic heating roller which comprises an inner core cylinder, an electromagnetic coil, a roller cylinder, a uniform heating layer and a heat insulation layer. The electromagnetic coil sleeves the inner core cylinder and is suitable for being connected with current. The roller is arranged on the side, away from the inner core cylinder, of the electromagnetic coil and can rotate relative to the electromagnetic coil, and the rotating axis of the roller is parallel to the axis of the electromagnetic coil. The soaking layer is made of heat conduction materials and is attached to the roller. The heat insulation layer is arranged on the side, facing the inner core cylinder, of the roller and attached to the roller, or the heat insulation layer is attached to the side, away from the roller, of the soaking layer. According to the utility model, a multi-layer electromagnetic heating structure is adopted, so that the beneficial effects that the temperature uniformity of the roller surface is good, the inner core is not overheated and the like are realized. Wherein the soaking layer can bring heat of the area with the high heating temperature to the area with the low heating temperature, so that the temperature of the surface of the whole roller tends to be balanced, the heat insulation layer can prevent heat loss, and the working efficiency of the soaking layer is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic heating equipment, in particular to a uniform temperature electromagnetic heating roller. Background Art

[0002] Rollers are the primary working components and tools on a rolling mill that produce continuous plastic deformation of the pole pieces. Currently, the most common method of heating rollers in the lithium battery industry is thermal oil heating. This method is not only energy-intensive but also prone to environmental pollution from thermal oil leaks. Furthermore, its low heating efficiency makes it difficult to meet the high-efficiency and environmentally friendly demands of modern industrial production. Therefore, a new roller heating process is needed to address this need. Electromagnetic heating rollers have emerged to address this need. The principle behind electromagnetically heated rollers is that, when energized, an internal electromagnetic coil generates an alternating magnetic field. This alternating magnetic field creates eddy currents in the metal roller, generating heat due to the metal's inherent electrical resistance, thereby heating the roller.

[0003] In related technologies, electromagnetic heating technology uses electromagnetic fields to excite eddy currents in the material inside the roller, thereby generating heat. If the distribution of the electromagnetic field is uneven, the eddy current distribution inside the roller will also be uneven, which will lead to uneven temperature on the outer surface of the roller. This unevenness may be due to problems with the design or configuration of the electromagnetic generating equipment, or it may be due to the shape, size or material properties of the roller itself. For example, the material of the roller has a large thermal resistance, resulting in poor heat transfer, which in turn causes uneven temperature on the outer surface. Uneven surface temperature of the roller can easily lead to fluctuations in the thickness of the rolled material, uneven performance, and other consequences, increase the scrap rate, and seriously affect the rolling quality. Utility Model Content

[0004] The main purpose of the utility model is to provide a uniform temperature electromagnetic heating roller, which can improve the uniformity of the surface temperature of the electromagnetic heating roller and improve the rolling quality.

[0005] To achieve the above objectives, some embodiments of the present invention provide a uniform temperature electromagnetic heating roller, comprising:

[0006] Inner core tube,

[0007] The electromagnetic coil is sleeved on the inner core tube, and the electromagnetic coil is suitable for passing current;

[0008] A roller is provided on a side of the electromagnetic coil facing away from the inner core cylinder, the roller being configured to rotate relative to the electromagnetic coil, and the rotation axis of the roller is parallel to the axis of the electromagnetic coil;

[0009] The heat-scaling layer is made of heat-conducting material and is attached to the roller;

[0010] The heat insulation layer is arranged on the side of the roller facing the inner core tube, and the heat insulation layer is attached to the roller, or the heat insulation layer is attached to the side of the heat equalizing layer away from the roller.

[0011] In some embodiments, the roller has a receiving cavity, which extends circumferentially around the rotation axis of the roller, and is used to receive the heat-saturating layer.

[0012] In some embodiments, the temperature-uniform electromagnetic heating roller further includes a temperature measuring component, which is disposed in the accommodating cavity.

[0013] In some embodiments, the thermal insulation layer and the electromagnetic coil are spaced apart.

[0014] In some embodiments, the uniform temperature electromagnetic heating roller further includes an insulation layer, which is attached to the inner core tube and is located on the side of the inner core tube facing the electromagnetic coil, and the electromagnetic coil is sleeved on the insulation layer.

[0015] In some embodiments, the temperature-uniform electromagnetic heating roller further includes an insulating layer, which is sandwiched between the thermal insulation layer and the inner core tube, with opposite sides of the insulating layer respectively abutting against the thermal insulation layer and the inner core tube.

[0016] In some embodiments, the uniform temperature electromagnetic heating roller includes an outer shell, the outer shell wraps around the inner core cylinder, and the outer shell is rotatably connected to the inner core cylinder;

[0017] The outer shell includes a front end cover of the roller shaft, a rear end cover of the roller shaft and a roller. The front end cover of the roller shaft is detachably connected to the roller, and the rear end cover of the roller shaft is detachably connected to the roller.

[0018] In some embodiments, the uniform temperature electromagnetic heating roller includes a coil inner core, which includes an inner core front end cover, an inner core rear end cover and an inner core barrel. Along the axial direction of the inner core barrel, the inner core front end cover and the inner core rear end cover are respectively detachably connected to the opposite sides of the inner core barrel.

[0019] In some embodiments, the temperature-uniform electromagnetic heating roller further includes an electric slip ring connected to the front end cover of the inner core, and the electric slip ring is suitable for electrically connecting the wires of the temperature-uniform electromagnetic heating roller.

[0020] In some embodiments, the temperature-uniform electromagnetic heating roller includes a rotating bearing, which is sleeved on the coil inner core, and the other side of the rotating bearing abuts against the outer shell, so that the outer shell is suitable for rotating relative to the coil inner core.

[0021] According to the above embodiments, the beneficial effects of the present invention are:

[0022] The utility model proposes a uniform temperature electromagnetic heating roller, comprising an inner core tube, an electromagnetic coil, a roller and a heat-equalizing layer, wherein the inner core tube serves as the basic support structure of the entire equipment. The electromagnetic coil is sleeved on the outside of the inner core tube, and the electromagnetic coil is designed to be spiral. When current passes through the electromagnetic coil, the electromagnetic coil generates a magnetic field, which acts on the roller, causing the roller to generate an eddy current effect, thereby causing the roller itself to heat up. Specifically, the roller is arranged on the side of the electromagnetic coil away from the inner core tube, and the roller can rotate relative to the electromagnetic coil, and its rotation axis is parallel to the axis of the electromagnetic coil. When current passes through the electromagnetic coil, the magnetic field generated will cause eddy currents to be generated inside the roller, and the eddy currents will generate heat and thus heat the roller. Compared with the traditional resistance heating method, the electromagnetic heating method has the advantages of high heating efficiency and uniform heating, which can significantly improve product quality and reduce energy consumption.

[0023] Furthermore, the electromagnetically heated rollers of this invention are equipped with a soaking layer made of a thermally conductive material, which adheres to the roller. This layer transfers heat from higher-temperature areas to lower-temperature areas, balancing the temperature across the roller surface. This further ensures surface temperature uniformity and helps improve the quality of rolled products and production efficiency. The insulation layer prevents heat loss, further enhancing the efficiency of the soaking layer and aiding its operation.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical utility model in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0026] Figure 1 This is a schematic structural diagram of a temperature-uniform electromagnetic heating roller in one embodiment of the present invention;

[0027] Figure 2 This is a schematic cross-sectional view of a temperature-uniform electromagnetic heating roller in one embodiment of the present invention;

[0028] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 This is a partial cross-sectional schematic diagram of an even-temperature electromagnetic heating roller in one embodiment of the present invention, wherein the even-temperature electromagnetic heating roller is provided with a temperature measuring component.

[0030] Description of Figure Numbers:

[0031] Outer shell 100; roller front end cover 110; roller rear end cover 120; roller 130;

[0032] Coil inner core 200; inner core front end cover 210; inner core rear end cover 220; inner core cylinder 230;

[0033] electromagnetic coil 300;

[0034] Thermal blanket 400;

[0035] Temperature measuring component 500; temperature measuring couple 510;

[0036] Thermal insulation layer 600;

[0037] Insulation layer 700;

[0038] Insulation layer 800;

[0039] Electric slip ring 910; coil conductor 920; electric couple wire hole 930; rotating bearing 940.

[0040] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical utility model in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0043] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or", "and / or" or "and / or" appear in the full text, its meaning includes three parallel utility models. Taking "A and / or B" as an example, it includes A utility model, or B utility model, or a utility model that satisfies both A and B. In addition, the technical utility models between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in this field can realize it. When the combination of technical utility models is mutually contradictory or cannot be realized, it should be deemed that such a combination of technical utility models does not exist and is not within the scope of protection required by the present invention.

[0044] In related technologies, electromagnetic heating technology uses electromagnetic fields to excite eddy currents in the material inside the roller, thereby generating heat. If the distribution of the electromagnetic field is uneven, the eddy current distribution inside the roller will also be uneven, which will lead to uneven temperature on the outer surface of the roller. This unevenness may be due to problems with the design or configuration of the electromagnetic generating equipment, or it may be due to the shape, size or material properties of the roller itself. For example, the material of the roller has a large thermal resistance, resulting in poor heat transfer, which in turn causes uneven temperature on the outer surface. Uneven surface temperature of the roller can easily lead to fluctuations in the thickness of the rolled material, uneven performance, and other consequences, increase the scrap rate, and seriously affect the rolling quality.

[0045] Reference below Figures 1 to 4 To describe the uniform temperature electromagnetic heating roller according to an embodiment of the present invention.

[0046] Reference Figure 1 and Figure 2In some embodiments, the temperature-equalizing electromagnetic heating roller of the present invention includes an inner core tube 230, an electromagnetic coil 300, a roller 130, a heat-equalizing layer 400, and a heat-insulating layer 600. The inner core tube 230 serves as the basic support structure of the entire device. The electromagnetic coil 300 is sleeved on the outer side of the inner core tube 230. The electromagnetic coil 300 is designed to be spiral. When current passes through the electromagnetic coil 300, the electromagnetic coil 300 generates a magnetic field. The magnetic field acts on the roller 130, causing the roller 130 to generate an eddy current effect, thereby causing the roller 130 to heat itself. Specifically, in some embodiments, the roller 130 is made of metal material, and the eddy current reacts with the internal resistance of the metal to generate heat. The roller 130 is arranged on the side of the electromagnetic coil 300 away from the inner core tube 230, and the roller 130 can rotate relative to the electromagnetic coil 300, and its rotation axis is parallel to the axis of the electromagnetic coil 300. When current passes through the electromagnetic coil 300, the generated magnetic field causes eddy currents to form inside the roller 130, which in turn heats the roller 130. Compared to traditional resistance heating, electromagnetic heating has the advantages of high heating efficiency and uniform heating, which can significantly improve product quality and reduce energy consumption.

[0047] In addition, the uniform temperature electromagnetic heating roller of the present invention is provided with a uniform heat layer 400, which is made of a heat-conducting material and is attached to the roller 130. The uniform heat layer 400 can bring heat from the higher heating temperature area to the lower heating temperature area, so that the temperature of the entire roller surface tends to be balanced. The material of the uniform heat layer 400 can be selected from metal materials with good thermal conductivity such as copper and aluminum. The provision of the uniform heat layer 400 further ensures the uniformity of the surface temperature of the roller 130, which helps to improve the quality and production efficiency of the rolled products. The heat insulation layer 600 can prevent heat loss, further improve the working efficiency of the uniform heat layer 400, and assist the work of the uniform heat layer 400.

[0048] It is understood that in some embodiments, to reduce magnetic loss, the inner core 230 is typically made of a non-magnetic material. In some embodiments, to improve the heat dissipation capability of the electromagnetic coil 300, the electromagnetic coil 300 is made of copper wire or other materials with good electrical conductivity, and / or a heat sink is provided on the outside of the electromagnetic coil 300.

[0049] In some embodiments, the heating efficiency and heat distribution effect can be further improved by optimizing the design and material selection of the electromagnetic coil 300. For example, the number of turns of the electromagnetic coil 300 can be adjusted to change the magnetic field strength, thereby controlling the heating rate.

[0050] Of course, it is understandable that regarding the way in which the heat-equalizing layer 400 is attached to the roller 130, in some embodiments, a groove or a receiving cavity is provided inside the roller 130, and the heat-equalizing layer 400 is embedded in the groove or the receiving cavity. This arrangement makes the heat-equalizing layer 400 closer to the outer surface of the roller 130 used for rolling products, so that the thermal balance effect of the outer surface of the roller 130 used for rolling products is better, and the inner and outer sides of the heat-equalizing layer 400 are attached to the roller 130, the bonding area is large, and the heat-equalizing effect feedback is rapid; in some embodiments, the heat-equalizing layer 400 is attached to the inner surface of the roller 130 facing away from the rolled product. This arrangement facilitates processing and saves production costs.

[0051] Reference Figure 2 and Figure 3 Regarding the aforementioned accommodating cavity, in some embodiments, the accommodating cavity of roller 130 extends circumferentially around the rotational axis of roller 130. When heat-saturating layer 400 is placed within the accommodating cavity, the contact area between it and roller 130 is increased, which helps to more quickly transfer heat to the surface of roller 130. Furthermore, the accommodating cavity design provides a certain degree of insulation, reducing heat loss and ensuring a more stable temperature of roller 130, thereby improving product quality.

[0052] In some embodiments, the accommodating cavity extends through the entire roller 130 in the circumferential direction around the axis of the roller 130. Specifically, the roller 130 is arranged in a ring, and there is a gap between the inner ring and the outer ring. This gap serves as the accommodating cavity. After the heat-spreading layer 400 is arranged in this gap, the other gaps between the heat-spreading layer 400 and the surface of the roller 130 are filled with a material with good thermal conductivity to fix the position of the heat-spreading layer 400. In some embodiments, the accommodating cavity is in the shape of a strip, and the strip-shaped accommodating cavities are spaced along the axis of the roller 130, or the strip-shaped accommodating cavities are spaced around the circumferential direction of the roller 130. The strip-shaped accommodating cavity is used to accommodate the heat-spreading layer 400. Therefore, as a preferred embodiment, it is only necessary to embed the heat-spreading layer 400 inside the roller 130. The shape of the accommodating cavity can be specifically set according to the actual size or purpose of the roller 130. The depth of the accommodating cavity can also be adjusted according to actual needs to ensure that the heat-spreading layer 400 can maintain good position stability during the heating process.

[0053] In some embodiments, in order to improve the thermal contact between the heat-spreading layer 400 and the roller 130 , a layer of thermal conductive adhesive may be added between the heat-spreading layer 400 and the roller 130 . This configuration not only enhances the stability of the connection between the two, but also further improves the heat conduction efficiency.

[0054] Reference Figure 2 and Figure 3In some embodiments, the temperature-equalizing electromagnetic heating roller includes an insulation layer 600, which is adhered to the inner surface of the roller 130, or the insulation layer 600 is attached to the side of the heat-equalizing layer 400 facing away from the roller 130. The insulation layer 600 and the electromagnetic coil 300 are spaced apart. Specifically, the insulation layer 600 can be made of a material with a low thermal conductivity coefficient, such as magnetic insulation materials such as quartz ceramics, ceramic fibers, aluminum silicate fibers, etc., to reduce the efficiency of heat conduction. The insulation layer 600 is attached to the side of the roller 130 facing the inner core tube 230. On the one hand, it can reduce the heat transfer from the roller 130 to the inner core tube 230, thereby effectively maintaining the working temperature of the inner core tube 230 stable and preventing the temperature of the inner core tube 230 from being too high due to heat conduction, which affects the safe operation of the equipment. On the other hand, the insulation layer 600 can prevent heat loss, further improve the working efficiency of the heat-equalizing layer 400, and assist the work of the heat-equalizing layer 400.

[0055] It is understood that in some embodiments, the thickness of the thermal insulation layer 600 is between 1 mm and 5 mm, for example, the thickness of the thermal insulation layer 600 is 1 mm, 3 mm, or 5 mm. A thermal insulation layer 600 that is too thick will increase the weight of the device, while a thermal insulation layer that is too thin will not provide adequate thermal insulation. In actual applications, the thickness of the thermal insulation layer 600 can be adjusted according to the specific working environment and the desired thermal insulation effect.

[0056] It is understandable that in some embodiments, in addition to being directly attached to the surface of the roller 130, the insulation layer 600 can also be designed to have a certain gap between it and the roller 130 to form an air layer, thereby utilizing the low thermal conductivity of air to further enhance the insulation effect.

[0057] Reference Figure 2 and Figure 3 In some embodiments, the temperature-uniform electromagnetic heating roller further includes an insulation layer 700, which is located on the side of the inner core tube 230 facing the electromagnetic coil 300. The insulation layer 700 can be made of a material with a low thermal conductivity coefficient, such as a silicate board, expanded perlite, etc., to reduce the heat loss generated by the electromagnetic coil 300, so that the electromagnetic coil 300 is maintained at a relatively constant operating temperature, which is conducive to improving heating efficiency and extending the life of the equipment. In some embodiments, the thickness of the insulation layer 700 is between 2 mm and 10 mm. For example, the thickness of the insulation layer 700 is 2 mm, 4 mm, 6 mm, 8 mm, or 10 mm, to ensure sufficient insulation effect while not affecting the compactness of the overall equipment.

[0058] Of course, it is understandable that the provision of the thermal insulation layer 700 can also provide a certain sound insulation effect, helping to reduce noise during equipment operation.

[0059] To adapt to different working environments, the insulation layer 700 can be designed in various shapes, such as corrugated or honeycomb, to increase the surface area in contact with the electromagnetic coil 300 and better perform the insulation function. In some embodiments, the insulation layer 700 can also be designed to be replaceable for easy maintenance.

[0060] Reference Figure 2 and Figure 3 In some embodiments, the temperature-uniform electromagnetic heating roller further includes an insulating layer 800, which is sandwiched between the thermal insulation layer 700 and the inner core tube 230 to prevent current leakage and ensure the safe operation of the equipment. The insulating layer 800 can be made of high-temperature resistant insulating materials, such as mica paper, epoxy resin, etc., so as to have good electrical insulation and heat resistance. In some embodiments, the thickness of the insulating layer 800 is between 0.5 mm and 2 mm. For example, the thickness of the insulating layer 800 is 0.5 mm, 1 mm, 1.5 mm, and 2 mm to ensure sufficient insulation effect. Taking into account the overall size and weight of the equipment, the thickness of the insulating layer 800 can be determined according to the maximum operating voltage level of the equipment to ensure safety and reliability.

[0061] It is understood that in some embodiments, to improve the reliability of the insulation layer 800, a waterproof and moisture-proof protective film may be applied to the surface of the insulation layer 800 to prevent degradation of insulation performance in humid environments. In some embodiments, the insulation layer 800 may also be designed as a multi-layer structure, increasing the number of layers to improve insulation performance and be suitable for devices with higher voltage levels. In some embodiments, a temperature sensor may also be installed within the insulation layer 800 to monitor temperature changes in real time to ensure safe and stable operation of the device.

[0062] In summary, the provision of the heat-insulating layer 600, the thermal insulation layer 700 and the insulating layer 800 not only helps to improve the heating efficiency and working stability of the uniform temperature electromagnetic heating roller, but also ensures the safe operation of the equipment, reduces energy consumption and prolongs its service life.

[0063] Reference Figure 2 and Figure 3In some embodiments, the uniform temperature electromagnetic heating roller includes an outer shell 100, which wraps around the inner core tube 230, and the outer shell 100 and the inner core tube 230 are rotatably connected. The outer shell 100 includes three parts: a roller front end cover 110, a roller rear end cover 120, and a roller 130, which are detachably assembled together. The roller front end cover 110 and the roller rear end cover 120 are respectively connected to the two ends of the roller 130, and together with the roller 130, they constitute the outer shell 100. The material of the outer shell 100 is generally selected from metal materials with good thermal conductivity and mechanical strength, such as forged steel or alloy steel. In order to ensure good sealing and facilitate installation and disassembly, the roller front end cover 110 and the roller rear end cover 120 can be connected to the roller 130 by means of bolts or snaps. In addition, in order to facilitate daily maintenance and inspection, the structural design of the outer shell 100 is as simple as possible to facilitate disassembly and assembly.

[0064] It is understood that in some embodiments, to enhance the heat dissipation performance of the outer shell 100, a heat sink or heat pipe or other heat dissipation technology may be provided on its surface. To enhance the corrosion resistance of the outer shell 100, the outer shell 100 may be subjected to surface treatment such as chrome plating or spraying with corrosion-resistant paint.

[0065] Reference Figure 2 and Figure 3 In some embodiments, the temperature-uniform electromagnetic heating roller includes a coil inner core 200, which includes an inner core front end cover 210, an inner core rear end cover 220, and an inner core barrel 230. The inner core front end cover 210 and the inner core rear end cover 220 are detachably connected to opposite sides of the inner core barrel 230 along the axis of the inner core barrel 230. The inner core front end cover 210 and the inner core rear end cover 220 can be connected to the inner core barrel 230 by threaded connection or slot connection, etc., to ensure a secure connection and easy disassembly.

[0066] It is understood that the coil core 200 needs to have good mechanical strength and thermal stability. In some embodiments, the inner core barrel 230 can be made of non-magnetic materials such as ceramic or plastic to reduce magnetic field interference. The inner core front cover 210 and the inner core rear cover 220 can be made of high-strength alloy materials to improve the stability and durability of the overall structure. To improve the sealing of the joints, O-rings or other types of seals can be used at the joints.

[0067] To further improve the assembly efficiency of the inner core barrel 230, the inner core front cover 210 and the inner core rear cover 220 can be designed with a quick-connect mechanism, such as a quick-release pin or a locking ring. When using a quick-release pin, the inner core front cover 210 or the inner core rear cover 220 are connected and disconnected from the inner core barrel 230 by inserting or removing a pin. Specifically, a pin is mounted on the inner core front cover 210 or the inner core rear cover 220, and a pin hole is provided on the inner core barrel 230. During installation, the connection is completed by simply aligning the pin with the pin hole and inserting it; during removal, the pin is simply removed. This design is simple and reliable, making it suitable for frequent assembly and disassembly. When using a locking ring, the inner core front cover 210 or the inner core rear cover 220 is locked or unlocked with the inner core barrel 230 by rotating it. Specifically, the locking ring is typically composed of two parts: one part is fixed to the inner core front cover 210 or the inner core rear cover 220, and the other part is fixed to the inner core barrel 230. During installation, the two parts are tightly connected by rotating. When disassembling, they can be easily separated by rotating in the opposite direction. The locking ring can be designed in various forms, such as spiral locking rings and snap-on locking rings, to suit different application scenarios.

[0068] Reference Figure 2 and Figure 3 In some embodiments, the temperature-uniform electromagnetic heating roller includes a rotating bearing 940, which is sleeved on the coil inner core 200, and the other side of the rotating bearing 940 abuts the outer shell 100, so that the outer shell 100 is suitable for rotating relative to the coil inner core 200. The function of the rotating bearing 940 is to support the roller 130 and the outer shell 100 and ensure that they can rotate smoothly. The selection of the rotating bearing 940 needs to consider its load-bearing capacity and service life. High-precision deep groove ball bearings or cylindrical roller bearings can be selected. In order to ensure the normal operation of the rotating bearing 940, the bearing needs to be lubricated regularly and kept clean to prevent dust and impurities from entering the inside of the rotating bearing 940. In addition, in order to increase the service life of the rotating bearing 940, it is also necessary to pay attention to controlling the operating temperature of the rotating bearing 940.

[0069] It can be understood that, in some embodiments, the rotating bearing 940 can be selected from multiple types of bearings to adapt to different load conditions.

[0070] In some embodiments, to improve the heat dissipation capability of the rotating bearing 940, cooling channels or heat sinks can be provided on the bearing seat of the rotating bearing 940. To improve the sealing performance of the bearing, a dust cover or sealing ring can be installed on the bearing seat of the rotating bearing 940. Furthermore, to facilitate the installation and replacement of the rotating bearing 940, the bearing seat of the rotating bearing 940 can be designed as a separate structure from the coil inner core 200.

[0071] Reference Figure 4In some embodiments, the uniform temperature electromagnetic heating roller further includes an electric slip ring 910, which is a rotary connector that ensures that the conductor can stably transmit power during the rotation of the roller 130. The design of the electric slip ring 910 needs to consider the selection of its contact material, and materials that are wear-resistant and have good conductivity, such as precious metal alloys, are generally selected. The installation of the electric slip ring 910 needs to ensure a stable connection between it and the inner core front end cover 210, while ensuring good contact between the conductor and the electric slip ring 910. In some embodiments, in order to reduce friction torque, the electric slip ring 910 can also be used in conjunction with a lubricant.

[0072] It is understood that in some embodiments, the slip ring 910 can adopt a variety of structural designs, such as carbon brush slip rings, metal brush slip rings, etc., to meet the requirements of different working environments. To improve the durability and reduce wear of the slip ring 910, the slip ring surface can be plated with a wear-resistant material. In addition, to improve the waterproof performance of the slip ring 910, a waterproof sealing ring can be installed around it. For easy maintenance and replacement, the slip ring 910 can be designed to be detachable.

[0073] Reference Figure 4 In some embodiments, the electromagnetically heated roller further includes a temperature measuring component 500 , which can be located within the receiving chamber. The temperature measuring component 500 monitors temperature changes of the heat soaking layer 400 in real time, enabling timely adjustment of the heating power and ensuring accurate temperature control during the heating process. Based on the feedback from the temperature measuring component 500 , the control system dynamically adjusts the current to ensure that the temperature of the heat soaking layer 400 remains within a set range. This closed-loop control method helps maintain the stability of the surface temperature of the roller 130 and improves processing accuracy.

[0074] In some embodiments, the temperature measuring component 500 can use sensors such as thermocouples 510 or thermistors, which have high measurement accuracy and reliability. Specifically, the electric slip ring 910 is connected to the front end cover 210 of the inner core. The electric slip ring 910 is used to electrically connect the wires of the temperature-equalizing electromagnetic heating roller. A thermocouple wire hole 930 is provided in the electric slip ring 910. The thermocouple wire hole 930 is used to pass the wires of the temperature-equalizing thermocouple 510. The temperature measuring component 500 is positioned close to the heat-equalizing layer 400 to obtain the most accurate temperature reading. In order to protect the temperature measuring component 500 from damage by high temperature, a protective cover made of high-temperature resistant material can be added around it. In addition, multiple temperature measuring points can be added to monitor temperature changes at different locations to further improve the accuracy of temperature control.

[0075] The following is a systematic description of the uniform temperature electromagnetic heating roller in one embodiment of the present invention based on the principle and structure of the present invention. Figure 2 and Figure 3The present invention comprises a roller front end cover 110, a roller barrel 130, and a roller rear end cover 120, which are fixed together with set screws to form an outer shell 100. A heat-dissipating layer 400 is provided inside the roller barrel 130. This heat-dissipating layer is filled with a highly thermally conductive material and extends throughout the entire roller surface, ensuring a uniform temperature. A heat-insulating layer 600, made of magnetically permeable quartz ceramic, is adhered to the inner surface of the roller barrel 130 to prevent overheating of the internal coil. The inner core rear end cover 220, the inner core barrel 230, and the inner core front end cover 210 are fixed together with set screws to form the coil inner core 200. This coil inner core is connected to the outer wall of the roller via support bearings on the inner core rear end cover 220 and the inner core front end cover 210. The inner core front end cover 210 is coated with an insulating layer 800 to shield electromagnetic radiation, preventing the inner core from induction heating. A heat-insulating layer 700 is provided outside the insulating layer 800 to isolate the coil from heat from the outer wall of the roller. The electromagnetic coil 300 is wound around the outside of the insulation layer 700. A coil conductor 920 is welded to the tail of the electromagnetic coil 300. The conductor enters the inner core 200 through the small hole on the inner core barrel 230 and is led out to the outside of the roller through the through hole at the end of the inner core front cover 210. The electric slip ring 910 is fixed to the outside of the inner core front cover 210, and the conductor is connected to the coil conductor 920. Specifically, refer to Figure 4 The temperature measuring thermocouple 510 is fixed inside the roller 130 , and the end wire is led out to the outside of the roller through the thermocouple wire hole 930 and connected to the electric slip ring 910 .

[0076] The operating principle of this device is that the electromagnetic coil 300, supported by the inner core 230, is energized to generate an electromagnetic field. This electromagnetic field generates eddy currents through the roller 130, which react with the internal resistance of the metal to generate heat. The thermally conductive material within the heat-scaling layer 400 transfers heat from the higher-temperature areas to the lower-temperature areas, thus balancing the temperature across the entire roller surface.

[0077] The heat generated by roller 130 is shielded by thermal insulation layer 600, preventing the coil from being heated by the heat generated by roller 130 and affecting its heating performance. During operation, the outer roller wall, consisting of the roller front cover 110, roller 130, and rear cover 120, rotates, while the coil inner core 200, consisting of the inner core rear cover 220, inner core barrel 230, and inner core front cover 210, does not rotate. This function is achieved by rotating bearing 940 between the two.

[0078] The thermocouple 510 detects the temperature and feeds it back to the temperature control system. The temperature control system adjusts the roller temperature to the set value by adjusting the power of the electromagnetic coil 300. As the roller 130 rotates, the thermocouple 510 and its wires rotate together. The wires of the thermocouple 510 are connected to the rotating end of the slip ring 910. The synchronous rotation of the slip ring 910 and the roller 130 prevents the wires from becoming tangled during rotation.

[0079] In summary, the utility model adopts a split structural design combined with a multi-layer electromagnetic heating structure, which achieves many beneficial effects such as convenient disassembly, maintenance and debugging, good roller surface temperature uniformity, online feedback adjustment of roller surface temperature, no overheating of the inner core, and heating temperature exceeding 200°C.

[0080] The above are only preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A uniform temperature electromagnetic heating roller, characterized in that: include: Inner core tube, An electromagnetic coil is sleeved on the inner core tube, and the electromagnetic coil is suitable for passing current; a roller, disposed on a side of the electromagnetic coil facing away from the inner core cylinder, the roller being configured to rotate relative to the electromagnetic coil, and a rotation axis of the roller being parallel to an axis of the electromagnetic coil; A heat-sparing layer is made of a heat-conducting material, and the heat-sparing layer is attached to the roller; The heat insulating layer is arranged on the side of the roller facing the inner core tube, and the heat insulating layer is attached to the roller, or the heat insulating layer is attached to the side of the heat equalizing layer away from the roller.

2. The uniform temperature electromagnetic heating roller according to claim 1, characterized in that: The roller has a receiving cavity, which extends circumferentially around the rotation axis of the roller and is used to receive the heat-dissipating layer.

3. The uniform temperature electromagnetic heating roller according to claim 2, characterized in that: The temperature-uniform electromagnetic heating roller further includes a temperature measuring component, which is disposed in the accommodating cavity.

4. The uniform temperature electromagnetic heating roller according to claim 1, characterized in that: The heat insulation layer and the electromagnetic coil are spaced apart from each other.

5. The uniform temperature electromagnetic heating roller according to claim 1, characterized in that: The temperature-uniform electromagnetic heating roller further comprises a heat-insulating layer, which is attached to the inner core tube and is located on a side of the inner core tube facing the electromagnetic coil, and the electromagnetic coil is sleeved on the heat-insulating layer.

6. The uniform temperature electromagnetic heating roller according to claim 5, characterized in that: The temperature-uniform electromagnetic heating roller further comprises an insulating layer, which is sandwiched between the heat-insulating layer and the inner core tube, and opposite sides of the insulating layer respectively abut against the heat-insulating layer and the inner core tube.

7. The uniform temperature electromagnetic heating roller according to claim 1, characterized in that: The temperature-uniform electromagnetic heating roller comprises an outer shell, the outer shell wraps the inner core cylinder, and the outer shell is rotatably connected to the inner core cylinder; Wherein, the outer shell includes a front end cover of the roller shaft, a rear end cover of the roller shaft and the roller, the front end cover of the roller shaft is detachably connected to the roller, and the rear end cover of the roller shaft is detachably connected to the roller.

8. The uniform temperature electromagnetic heating roller according to claim 7, characterized in that: The uniform temperature electromagnetic heating roller includes a coil inner core, and the coil inner core includes an inner core front end cover, an inner core rear end cover and the inner core tube. Along the axial direction of the inner core tube, the inner core front end cover and the inner core rear end cover are respectively detachably connected to the opposite sides of the inner core tube.

9. The uniform temperature electromagnetic heating roller according to claim 8, characterized in that: The temperature-uniform electromagnetic heating roller further comprises an electric slip ring, which is connected to the front end cover of the inner core and is suitable for electrically connecting to the wire of the temperature-uniform electromagnetic heating roller.

10. The uniform temperature electromagnetic heating roller according to claim 8, characterized in that: The temperature-uniform electromagnetic heating roller includes a rotating bearing, which is sleeved on the coil inner core. The other side of the rotating bearing abuts against the outer shell, so that the outer shell is suitable for rotating relative to the coil inner core.

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