A water-cooled electromagnetic induction heating roller device

Abstract

The invention provides a water-cooled electromagnetic induction heating roller device applied to the field of heating rollers, comprising a roller body and a roller end cover, wherein a driving shaft is arranged on the roller end cover, a heat dissipation protection tube is coaxially arranged in the roller body, tube end covers are arranged at both ends of the heat dissipation protection tube, an electromagnetic coil is fixed inside the heat dissipation protection tube, and a cooling water jacket is detachably sleeved on the outer wall of the heat dissipation protection tube; a plurality of spiral strips are fixed on the outer side of the cooling water jacket, the spiral strips are in conflict with the inner wall of the roller body, and a planetary gear mechanism for driving the heat dissipation protection tube and the cooling water jacket to rotate synchronously with the roller body in the opposite direction is arranged between the water pipe and the tube end cover. The invention can realize that during the process of rotating rolling of the roller body, the rotation force of the roller body itself is utilized to drive the heat dissipation protection tube and the cooling water jacket to reverse, thereby realizing the cold water supply of the spiral water channel, and has the advantages of large water-cooling heat dissipation area, water source circulation, strong water cooling effect, market prospects, and suitable for popularization and application.

Description

Technical Field

[0001] The present application relates to the field of heating rollers, and in particular to a water-cooled electromagnetic induction heating roller device. Background Art

[0002] Electromagnetic induction heating rollers mainly generate eddy currents in the roller body through electromagnetic induction, thereby causing the roller body to heat up. When alternating current passes through the electromagnetic coil, an alternating magnetic field is generated around it. The roller body, as a magnetic conductor, is placed in this alternating magnetic field. According to the law of electromagnetic induction, an induced electromotive force is generated in the roller body, thereby forming an induced current (eddy current). Since the roller body has a certain resistance, the eddy current will generate Joule heat when flowing in the roller body, causing the roller body temperature to rise.

[0003] A circulating water cooling system is usually set in the roller body to control the roller body temperature and prevent overheating. The existing roller body water cooling water channel is prone to scale formation inside due to water quality problems. Since the water channel adopts a closed design, the internal scale is difficult to clean and the maintenance convenience is poor, which affects the water cooling efficiency. Therefore, a water-cooled electromagnetic induction heating roller device is proposed. Summary of the invention

[0004] The purpose of the present application is to solve the technical problem that the existing water channel adopts a closed design, the internal scale is difficult to clean, the maintenance convenience is poor, and the water cooling efficiency is affected. Compared with the existing technology, a water-cooled electromagnetic induction heating roller device is provided, including a roller body and roller end covers detachably connected to both ends of the roller body, the roller end covers are fixed with a driving shaft, a heat dissipation protection tube is coaxially arranged in the roller body, both ends of the heat dissipation protection tube are detachably connected with the tube end covers, the inner sides of both ends of the roller body are provided with sealed bearings, the tube end covers are rotatably connected to the inner side of the roller body through the sealed bearings, an electromagnetic coil is fixed inside the heat dissipation protection tube, and the outer wall of the heat dissipation protection tube is detachably sleeved with a cooling water jacket;

[0005] A plurality of spiral strips evenly distributed at equal angles are fixed to the outside of the cooling water jacket, the side of the spiral strips away from the cooling water jacket conflicts with the inner wall of the roller body, and two adjacent groups of spiral strips conflict with the inner wall of the roller body to form a spiral water channel, a water pipe is coaxially arranged in the roller end cover, the water pipe is fixed on a bearing seat for supporting the drive shaft, the water pipe is used to provide a connection port for draining water for the spiral water channel, and a planetary gear mechanism is also provided between the water pipe and the pipe end cover for driving the heat dissipation protection pipe and the cooling water jacket to rotate synchronously in the opposite direction to the roller body.

[0006] Furthermore, the planetary gear mechanism includes a ring gear arranged on the inner side of the roller end cover, a planet carrier is fixed on the water pipe, three groups of planetary gears arranged at equal angles and meshing with the ring gear are rotatably connected to the planet carrier, and a sun gear meshing with the three groups of planetary gears is fixed at the end of the pipe end cover.

[0007] Furthermore, a conductive slip ring is provided on one side of the tube end cover, and the conductive slip ring is used to provide power for the electromagnetic coil. An assembly groove corresponding to the electromagnetic coil is provided inside the heat dissipation protection tube.

[0008] Furthermore, the outer wall of the heat dissipation protection tube is also provided with a plurality of heat dissipation fins arranged at equal angles, and the inner wall of the cooling water jacket is provided with heat conduction convex strips corresponding to the heat dissipation fins.

[0009] Furthermore, the end of the water pipe opposite to the pipe end cover is provided with a male butt joint, and one side of the pipe end cover is provided with a female butt joint corresponding to the male butt joint, and the male butt joint and the female butt joint are sealed by a sealing slip ring;

[0010] The cooling water jacket is provided with notches at both ends of the spiral water channel, and the inner wall of the pipe end cover is provided with a plurality of water supply and drainage channels arranged at equal angles, one end of the water supply and drainage channel is connected to the docking female port, and the other end of the water supply and drainage channel is connected to the spiral water channel.

[0011] Furthermore, a vortex centrifugal blade is fixed in the pipe end cover, and the vortex centrifugal blade is arranged at the connecting node between the water supply and drainage channel and the docking female port. The output end of the vortex centrifugal blade is connected to the input end of the water supply and drainage channel, and a filter is also fixed on the output end side of the vortex centrifugal blade.

[0012] Furthermore, a guide column is fixed in the middle of the vortex centrifugal blade, the end of the guide column is a conical structure, and a spiral blade is fixed on the outer wall of the guide column.

[0013] Furthermore, the spiral directions of the spiral blades at both ends of the heat dissipation protection tube are arranged in a mirror-symmetrical manner, and the vortex lines of the vortex line centrifugal blades at both ends of the heat dissipation protection tube are arranged in a mirror-symmetrical manner.

[0014] Furthermore, the water pipes are all provided with electromagnetic valves.

[0015] Furthermore, the cooling water jacket is made of a heat-conducting silicone rubber structure as a whole, the heat dissipation protection tube is made of a copper structure as a whole, and the inner side of the cooling water jacket is glued to the outer wall of the heat dissipation protection tube.

[0016] Compared with the prior art, the advantages of this application are:

[0017] The present invention uses a heat dissipation protection tube with a cooling water jacket and a roller end cover with a planetary gear mechanism, so that during the process of rotating rolling of the roller body, the rotational force of the roller body itself can be used to drive the heat dissipation protection tube and the cooling water jacket to reverse, thereby realizing the cold water supply of the spiral water channel. The invention has the advantages of large water-cooling heat dissipation area, self-circulating water, strong water cooling effect, good market prospects, and suitable for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of this application;

[0019] Figure 2 This is a schematic diagram of the internal structure when the roller end cover is opened and the heat dissipation protection tube is taken out in this application;

[0020] Figure 3 This is a schematic diagram of the explosion structure of this application;

[0021] Figure 4 It is a schematic diagram of the exploded structure of the heat dissipation protection tube and its components proposed in this application;

[0022] Figure 5 It is a schematic diagram of the structure of the roller end cover and the water pipe proposed in this application;

[0023] Figure 6 It is a schematic diagram of the structure of the pipe end cover proposed in this application;

[0024] Figure 7 This is a schematic diagram of the transverse cross-sectional structure of the pipe end cover proposed in this application;

[0025] Figure 8 This is a schematic diagram of the internal structure of the heat dissipation protection tube proposed in this application;

[0026] Fig. 9 It is a schematic diagram of the structure of the cooling water jacket proposed in this application;

[0027] Fig.10 It is a schematic diagram of the cross-sectional structure of this application;

[0028] Fig.11 for Fig.10 A schematic diagram of the enlarged structure of the middle part A;

[0029] Fig.12 This is a schematic diagram of the water flow direction in this application.

[0030] Description of the numbers in the figure:

[0031] 1. Roller body; 11. Sealed bearing; 2. Roller end cover; 21. Drive shaft; 22. Gear ring; 3. Water pipe; 301. Sealed slip ring; 31. Planet carrier; 32. Planetary gear; 33. Male joint; 4. Heat dissipation protection tube; 41. Heat dissipation fin; 42. Assembly groove; 5. Pipe end cover; 51. Conductive slip ring; 52. Sun gear; 53. Water supply and drainage channel; 54. Female joint; 55. Guide column; 551. Spiral blade; 56. Vortex centrifugal blade; 561. Filter screen; 6. Cooling water jacket; 601. Spiral water channel; 61. Spiral strip; 62. Notch; 63. Heat-conducting convex strip; 7. Electromagnetic coil. DETAILED DESCRIPTION

[0032] The embodiments will be combined with the drawings in the specification to clearly and completely describe the technical solution of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making any creative work shall fall within the scope of protection of the present application. Example 1

[0033] The present invention provides a water-cooled electromagnetic induction heating roller device, see Figure 1 - Fig.12 , including a roller body 1 and roller end covers 2 detachably connected to both ends of the roller body 1. Specifically, the roller end covers 2 are detachably connected to the ends of the roller body 1 by bolts. The surface of the roller body 1 is chrome-plated or ceramic-coated to improve the surface hardness and wear resistance, while enhancing the heat conduction performance. The roller end covers 2 are arranged at both ends of the roller body 1 to ensure the sealing of the internal structure and prevent water leakage and the entry of impurities such as dust.

[0034] A driving shaft 21 is fixed on each roller end cover 2, and the driving shaft 21 is rotatably connected to the bearing seat to support the rotating rolling action of the roller body 1. A heat dissipation protection tube 4 is coaxially arranged in the roller body 1, and both ends of the heat dissipation protection tube 4 are detachably connected to the tube end covers 5 through a bolt structure. Sealed bearings 11 are arranged on the inner sides of both ends of the roller body 1, and the tube end covers 5 are rotatably connected to the inner side of the roller body 1 through the sealed bearings 11;

[0035] An electromagnetic coil 7 is fixed inside the heat dissipation protection tube 4. In order to prevent leakage between the electromagnetic coil 7 and the heat dissipation protection tube 4, mica insulating material is filled between the heat dissipation protection tube 4 and the electromagnetic coil 7 to ensure that a uniform electromagnetic field is generated on the surface of the roller body to achieve efficient electromagnetic induction heating. Furthermore, the electromagnetic coil 7 is equipped with an electromagnetic controller for adjusting the frequency and voltage of the alternating current, thereby controlling the power and temperature of the electromagnetic induction heating. The electromagnetic controller adopts advanced microprocessor control technology, which can achieve precise temperature control and a variety of heating mode selection.

[0036] The outer wall of the heat dissipation protection tube 4 is detachably sleeved with a cooling water jacket 6;

[0037] Specifically, the cooling water jacket 6 is a thermally conductive silicone rubber structure as a whole. Since the thermally conductive silicone rubber can be used for a long time in the temperature range of -60°C to 250°C, the cooling water jacket 6 can maintain elasticity and sealing in a long-term high-temperature environment. At the same time, the thermally conductive silicone rubber has good electrical insulation performance and high volume resistivity, and can form good insulation protection and thermal conductivity and heat dissipation between the heat dissipation protection tube 4 and the roller body 1. The heat dissipation protection tube 4 is a copper structure as a whole. Since copper has no magnetic conductivity, it is difficult to generate eddy currents of sufficient intensity under the action of electromagnetic induction, and it is not easy to be heated by the electromagnetic induction of the electromagnetic coil 7 and effectively heat up, which can effectively prevent the heat dissipation protection tube 4 from self-heating. In order to solve the purpose of continuous power supply of the electromagnetic coil 7 during the rotation of the heat dissipation protection tube 4, a conductive slip ring 51 is also provided on one side of the tube end cover 5. The conductive slip ring 51 is used to provide power to the electromagnetic coil 7, and an assembly groove 42 corresponding to the electromagnetic coil 7 is provided inside the heat dissipation protection tube 4;

[0038] The inner side of the cooling water jacket 6 is glued to the outer wall of the heat dissipation protection tube 4. After the cooling water jacket 6 has been used for a long time, it can be debonded and disassembled, and then the cooling water jacket 6 can be replaced as a whole. The specific replacement method is to remove the roller end cover 2, take out the heat dissipation protection tube 4 with the tube end cover 5 from the roller body 1, and after removing the tube end covers 5 at both ends of the heat dissipation protection tube 4, the cooling water jacket 6 on the surface of the heat dissipation protection tube 4 can be replaced. At the same time, after removing the tube end cover 5, the electromagnetic coil 7 can be taken out from the assembly groove 42 of the heat dissipation protection tube 4 for inspection, which effectively improves the maintenance convenience of each wearing part.

[0039] See also Figure 5 - Fig. 9 It should be noted that in the present embodiment, a plurality of spiral bars 61 evenly distributed at equal angles are fixed to the outside of the cooling water jacket 6, the side of the spiral bars 61 away from the cooling water jacket 6 conflicts with the inner wall of the roller body 1, and two adjacent groups of spiral bars 61 conflict with the inner wall of the roller body 1 to form a spiral water channel 601, and a water pipe 3 is coaxially arranged in the roller end cover 2, and the water pipe 3 is fixed on a bearing seat for supporting the drive shaft 21, and the water pipe 3 is used to provide a connection port for draining water for the spiral water channel 601, and further, an electromagnetic valve is provided on the water pipe 3, and a planetary gear mechanism is also provided between the water pipe 3 and the pipe end cover 5 to drive the heat dissipation protection pipe 4 and the cooling water jacket 6 to rotate synchronously in the opposite direction to the roller body 1.

[0040] When the roller body 1 needs to be water-cooled during the action of rotating and rolling in a fixed direction, the water pipes 3 on both sides of the roller body 1 open the electromagnetic valves, and the water pipe 3 at one end provides a cold water source for one end of the spiral water channel 601, and cooperates with the intervention of the planetary gear mechanism to drive the heat dissipation protection tube 4 and the cooling water jacket 6 to rotate in the opposite direction of the rotation of the roller body 1. During this process, the cold water source in the spiral water channel 601 uses the spiral propulsion force of the spiral strip 61 to spirally advance along the inner wall of the roller body 1, thereby effectively increasing the contact area between the cold water source and the roller body 1, improving the efficiency and uniformity of water cooling, and being able to timely and effectively take away the heat generated by the roller body 1, preventing the roller body 1 from overheating, and extending the service life of the roller body 1. At the same time, it also helps the roller body 1 to maintain temperature stability and improve heating accuracy.

[0041] It should be noted that in this embodiment, multiple temperature sensors are installed at different positions on the inner surface and inside of the roller body 1 to monitor the temperature distribution of the roller body in real time. The temperature sensor transmits the collected temperature signal to the temperature controller, and the temperature controller coordinates the electromagnetic coil 7 and the electromagnetic valve of the water pipe 3 according to the preset temperature range and the actually monitored temperature data.

[0042] When the temperature exceeds the set upper limit, the electromagnetic heating power of the electromagnetic coil 7 is automatically reduced or the opening degree of the electromagnetic valve 3 is increased, and the spiral water channel 601 is used for water cooling and heat dissipation.

[0043] Furthermore, due to the replaceable structure of the cooling water jacket 6, during the long-term water cooling process, the accumulated scale on the surface of the cooling water jacket 6 can be maintained by disassembling the cooling water jacket 6. The inner wall of the roller body 1 is scraped by the spiral strips 61 during the water cooling process, thereby effectively avoiding the accumulation of scale on the inner wall of the roller body 1. Compared with the traditional water cooling method with fixed water channels, it has the advantages of easy cleaning and large heat dissipation area.

[0044] See also Figure 5 - Figure 7 In this embodiment, the planetary gear mechanism includes a ring gear 22 arranged on the inner side of the roller end cover 2, a planet carrier 31 is fixed on the water pipe 3, three groups of planetary gears 32 arranged at equal angles and meshing with the ring gear 22 are rotatably connected to the planet carrier 31, and a sun gear 52 meshing with the three groups of planetary gears 32 is fixed at the end of the pipe end cover 5.

[0045] When the driving shaft 21 is driven by an external motor and drives the roller end cover 2 and the roller body 1 to rotate, the ring gear 22 is used to drive the planetary gear 32 to rotate in the same direction, and the engagement between the planetary gear 32 and the sun gear 52 is used to drive the sun gear 52 to rotate in the opposite direction, so that the heat dissipation protection tube 4 and the cooling water jacket 6 rotate synchronously in the opposite direction to the roller body 1. At the same time, the transmission ratio of the ring gear 22, the planetary gear 32 and the sun gear 52 is used to increase the rotation speed of the sun gear 52, and further increase the spiral pushing speed of the spiral bar 61, so as to achieve the purpose of increasing the flow speed of the cooling water source in the spiral waterway 601 and improving the water cooling efficiency.

[0046] For further information, see Fig.10 - Fig.11 The end of the water pipe 3 opposite to the pipe end cover 5 is provided with a docking male port 33, and one side of the pipe end cover 5 is provided with a docking female port 54 corresponding to the docking male port 33. Since the water pipe 3 is fixed as a whole on the bearing seat of the drive shaft 21, in order to improve the sealing performance of the docking female port 54 when rotating relative to the docking male port 33, the docking male port 33 and the docking female port 54 are sealed by a sealing slip ring 301;

[0047] The cooling water jacket 6 is provided with notches 62 at both ends of the spiral water channel 601, and the inner wall of the pipe end cover 5 is provided with a plurality of water supply and drainage channels 53 arranged at equal angles. One end of the water supply and drainage channel 53 is connected to the docking female port 54, and the other end of the water supply and drainage channel 53 is connected to the spiral water channel 601. The inside of the spiral water channel 601 can be supplied with water and drained through the docking male port 33, the docking female port 54, and the water supply and drainage channel 53.

[0048] For further information, see Figure 8 - Fig.10 In order to solve the heat dissipation problem of the electromagnetic coil 7 inside the heat dissipation protection tube 4, the outer wall of the heat dissipation protection tube 4 is also provided with a plurality of heat dissipation fins 41 arranged at equal angles, and the inner wall of the cooling water jacket 6 is provided with heat-conducting convex strips 63 corresponding to the heat dissipation fins 41. On the one hand, by utilizing the setting of the heat-conducting convex strips 63, the cooling water jacket 6 can be accurately positioned when it is sleeved on the outer wall of the heat dissipation protection tube 4, thereby ensuring the docking accuracy of the notch 62 and the water supply and drainage channel 53. On the other hand, the heat dissipation fins 41 on the heat dissipation protection tube 4 and the heat-conducting convex strips 63 on the cooling water jacket 6 can be utilized to introduce the temperature generated by the operation of the electromagnetic coil 7 into the cooling water jacket 6, and cooperate with the flow of the cold water source in the spiral water channel 601 to dissipate heat into the electromagnetic coil 7.

[0049] For further information, see Fig.10 - Fig.11In order to realize the force-free transportation of the cold water source in the spiral waterway 601, a vortex centrifugal blade 56 is also fixed in the pipe end cover 5. The vortex centrifugal blade 56 is arranged at the connecting node between the water supply and drainage channel 53 and the docking female port 54. The output end of the vortex centrifugal blade 56 is connected to the input end of the water supply and drainage channel 53. A filter screen 561 is also fixed on the output end side of the vortex centrifugal blade 56. A guide column 55 is also fixed in the middle of the vortex centrifugal blade 56. The end of the guide column 55 is a conical structure, and a spiral blade 551 is fixed on the outer wall of the guide column 55.

[0050] When the heat dissipation protection tube 4 and the tube end cover 5 use the planetary gear mechanism to achieve rapid rotation in the opposite direction to the roller body 1, the cold water without a power source in the water pipe 3 on one side uses the rotation of the guide column 55 and the spiral blade 551 to enter the vortex centrifugal blade 56, and uses the centrifugal pushing operation of the vortex centrifugal blade 56 to transport the cold water source to the spiral waterway 601, thereby realizing the automatic water pumping function during the water cooling process.

[0051] It should be noted that the spiral directions of the spiral blades 551 at both ends of the heat dissipation protection tube 4 are arranged in a mirror-symmetrical manner, and the vortex directions of the vortex centrifugal blades 56 at both ends of the heat dissipation protection tube 4 are arranged in a mirror-symmetrical manner. Therefore, during the rotation of the heat dissipation protection tube 4, when the spiral blades 551 and the vortex centrifugal blades 56 on one side push cold water, the spiral blades 551 and the vortex centrifugal blades 56 on the other side can extract cold water, further improving the flow speed of the cold water source in the spiral waterway 601, thereby achieving the purpose of improving the water cooling efficiency.

[0052] The present invention uses a heat dissipation protection tube 4 with a cooling water jacket 6 and a roller end cover 2 with a planetary gear mechanism. During the process of rotating rolling of the roller body 1, the rotational force of the roller body 1 itself is utilized to drive the heat dissipation protection tube 4 and the cooling water jacket 6 to reverse, thereby realizing the cold water supply of the spiral water channel 601. The invention has the advantages of large water-cooling heat dissipation area, self-circulating water, strong water cooling effect, good market prospects, and suitable for promotion and application.

[0053] The above is only the best implementation method adopted by this application in combination with current actual needs, but the protection scope of this application is not limited to this.

Claims

1. A water-cooled electromagnetic induction heating roller device, comprising a roller body (1) and roller end covers (2) detachably connected to both ends of the roller body (1), wherein a drive shaft (21) is fixed to each of the roller end covers (2), characterized in that: A heat dissipation protection tube (4) is coaxially arranged inside the roller body (1), and tube end covers (5) are detachably connected to both ends of the heat dissipation protection tube (4). Sealed bearings (11) are arranged on the inner sides of both ends of the roller body (1), and the tube end covers (5) are rotatably connected to the inner side of the roller body (1) via the sealed bearings (11). An electromagnetic coil (7) is fixed inside the heat dissipation protection tube (4), and a cooling water jacket (6) is detachably sleeved on the outer wall of the heat dissipation protection tube (4); A plurality of spiral strips (61) arranged evenly at equal angles are fixed to the outside of the cooling water jacket (6); the side of the spiral strips (61) away from the cooling water jacket (6) contacts the inner wall of the roller body (1); two adjacent groups of spiral strips (61) contact the inner wall of the roller body (1) to form a spiral water channel (601); a water pipe (3) is coaxially arranged inside the roller end cover (2); the water pipe (3) is fixed on a bearing seat used to support the drive shaft (21); the water pipe (3) is used to provide a connection port for draining water for the spiral water channel (601); and a planetary gear mechanism is also provided between the water pipe (3) and the pipe end cover (5) to drive the heat dissipation protection pipe (4) and the cooling water jacket (6) to rotate synchronously with the roller body (1) in the opposite direction; The outer wall of the heat dissipation protection tube (4) is also provided with a plurality of heat dissipation fins (41) arranged at equal angles, and the inner wall of the cooling water jacket (6) is provided with heat conduction convex strips (63) corresponding to the heat dissipation fins (41); The end of the water pipe (3) opposite to the pipe end cover (5) is provided with a docking male port (33), and one side of the pipe end cover (5) is provided with a docking female port (54) corresponding to the docking male port (33), and the docking male port (33) and the docking female port (54) are sealed by a sealing slip ring (301); The cooling water jacket (6) is provided with notches (62) at both ends of the spiral water channel (601); the inner wall of the pipe end cover (5) is provided with a plurality of water supply and drainage channels (53) arranged at equal angles; one end of the water supply and drainage channel (53) is connected to the docking female port (54); and the other end of the water supply and drainage channel (53) is connected to the spiral water channel (601); A vortex centrifugal blade (56) is also fixed in the pipe end cover (5); the vortex centrifugal blade (56) is arranged at a connection node between the water supply and drainage channel (53) and the docking female port (54); the output end of the vortex centrifugal blade (56) is connected to the input end of the water supply and drainage channel (53); and a filter screen (561) is also fixed on the output end side of the vortex centrifugal blade (56); A guide column (55) is also fixed in the middle of the vortex centrifugal blade (56); the end of the guide column (55) is in a conical structure; and a spiral blade (551) is fixed on the outer wall of the guide column (55); The spiral directions of the spiral blades (551) at both ends of the heat dissipation protection tube (4) are arranged in a mirror-symmetrical manner, and the vortex lines of the vortex line centrifugal blades (56) at both ends of the heat dissipation protection tube (4) are arranged in a mirror-symmetrical manner.

2. A water-cooled electromagnetic induction heating roller device according to claim 1, characterized in that: The planetary gear mechanism comprises a gear ring (22) arranged inside the roller end cover (2); a planet carrier (31) is fixed on the water pipe (3); three groups of planetary gears (32) arranged at equal angles and meshing with the gear ring (22) are rotatably connected to the planet carrier (31); and a sun gear (52) meshing with the three groups of planetary gears (32) is fixed at the end of the pipe end cover (5).

3. A water-cooled electromagnetic induction heating roller device according to claim 2, characterized in that: A conductive slip ring (51) is also provided on one side of the tube end cover (5), and the conductive slip ring (51) is used to provide power to the electromagnetic coil (7). An assembly groove (42) corresponding to the electromagnetic coil (7) is provided inside the heat dissipation protection tube (4).

4. A water-cooled electromagnetic induction heating roller device according to claim 1, characterized in that: The water pipes (3) are all provided with electromagnetic valves.

5. A water-cooled electromagnetic induction heating roller device according to claim 1, characterized in that: The cooling water jacket (6) is of a heat-conducting silicone rubber structure as a whole, the heat dissipation protection tube (4) is of a copper structure as a whole, and the inner side of the cooling water jacket (6) is glued to the outer wall of the heat dissipation protection tube (4).

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