Electromagnetic induction heating device and method

Abstract

The invention provides an electromagnetic induction heating device and method, and relates to the technical field of welding. The electromagnetic induction heating device comprises a heating inductor, a flexible adjuster and a hydraulic lifting platform. The heating inductor is used for heating, so that a large amount of loss of heat in the transfer process is avoided, the heating efficiency is improved, and the heating time is shortened. The surfacing area of the nuclear power reactor pressure vessel can be subjected to profiling through the flexible adjuster for profiling, and the surfacing area can obtain a uniform heating effect. The heating inductor can be close to or far away from the outer wall of the surfacing area through ascending or descending of the hydraulic lifting platform, operation and adjustment are facilitated, and other working procedures such as maintenance and transfer of equipment are also facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of welding, and in particular, to an electromagnetic induction heating device and method. Background Art

[0002] The Reactor Pressure Vessel (RPV) of a nuclear power reactor is one of the key equipment in the nuclear island of a nuclear power plant. The RPV of a nuclear power reactor is a large container that can withstand high temperature and high pressure. Its main function is to contain the reactor core and in-core components. A fission reaction of nuclear fuel occurs inside the RPV of a nuclear power reactor, generating heat. The RPV of a nuclear power reactor provides a closed space for the nuclear reaction, ensuring that radioactive substances do not leak into the external environment.

[0003] During the long-term operation of the RPV of a nuclear power reactor, the inner wall of the transition section may be worn or locally damaged for various reasons. These worn or damaged areas can be repaired by surfacing. The surfacing material can fill the worn pits or cover the damaged surface, restoring the integrity of the inner wall of the transition section. In addition, materials with better anti-irradiation performance can be added in local areas by surfacing. These surfacing materials are specially designed to contain elements that can absorb neutrons or have a microstructure that resists irradiation damage, thereby improving the performance of the inner wall of the transition section in an irradiation environment. Enhancing the wear resistance of the inner wall and protecting the integrity of the internal structure of the container.

[0004] In the existing related technologies, a gas torch or a combustion furnace is used to heat the surfacing area on the RPV of a nuclear power reactor. However, the gas torch or the combustion furnace has low thermal efficiency, resulting in low efficiency and high comprehensive cost in the surfacing treatment of the RPV of a nuclear power reactor. Summary of the Invention

[0005] To solve the above problems, the present invention provides an electromagnetic induction heating device and method.

[0006] In a first aspect, the present invention provides an electromagnetic induction heating device, including: a heating inductor for heating, a flexible adjuster for profiling, and a hydraulic lifting platform for lifting;

[0007] The flexible adjuster is installed on the hydraulic lifting platform; the heating inductor is installed on the flexible adjuster;

[0008] The hydraulic lifting platform is used to drive the flexible adjuster to move towards the outer wall of the surfacing area of the RPV of a nuclear power reactor, the flexible adjuster is used to profile the outer wall of the surfacing area, and the heating inductor is used to be installed conformally on the flexible adjuster.

[0009] Optionally, the heating inductor includes: a heat insulator and a heating cable;

[0010] The heating cable is wound and installed on the heat insulator.

[0011] Optionally, the heat insulator is in a sheet structure.

[0012] Optionally, the flexible adjuster includes: a substrate and a profiling device;

[0013] The substrate is installed on the hydraulic lifting platform; the profiling device is fixedly connected to the substrate through an angle steel; the heating inductor is installed on the profiling device.

[0014] Optionally, the profiling device includes: a plurality of adjusting units arranged at intervals on the substrate, and each adjusting unit includes: a vertical plate, a telescopic plate and an angle plate;

[0015] The vertical plate is fixedly connected to one side of the angle steel; the other side of the angle steel is fixedly connected to the substrate of the flexible adjuster; the telescopic plate is connected to the vertical plate through a bolt and the vertical position of the telescopic plate relative to the vertical plate is adjustable; the angle plate is installed at one end of the telescopic plate.

[0016] Optionally, the telescopic plate is provided with a vertical waist-shaped hole, and the vertical plate is provided with a threaded hole, and the bolt passes through the waist-shaped hole of the telescopic plate and is screwed into the threaded hole of the vertical plate.

[0017] Optionally, the angle plate is provided with a vertical waist-shaped hole, and the telescopic plate is provided with a threaded hole, and the bolt passes through the waist-shaped hole of the angle plate and is screwed into the threaded hole of the telescopic plate.

[0018] In a second aspect, the present invention provides an electromagnetic induction heating method based on the above electromagnetic induction heating device, including:

[0019] Based on the outer wall of the surfacing area of the nuclear power reactor pressure vessel, the heating inductor is profiled through the hydraulic lifting platform and the flexible adjuster;

[0020] The profiled heating inductor is attached to the outer wall of the surfacing area of the nuclear power reactor pressure vessel, and the surfacing area is preheated through the heating inductor;

[0021] Detect the temperature of the inner wall of the surfacing area of the nuclear power reactor pressure vessel, and after the temperature of the inner wall reaches the surfacing temperature, perform surfacing treatment on the inner wall of the surfacing area;

[0022] After the surfacing treatment is completed, the surfacing area is heated up through the heating inductor, and after the temperature of the inner wall reaches the heat treatment temperature, heat preservation treatment is performed on the inner wall of the surfacing area.

[0023] Optionally, before profiling the heating inductor, the following steps are further included:

[0024] Clean the surfacing area of the nuclear power reactor pressure vessel, and use ceramic fiber heat insulation felts to insulate and protect the areas of the nuclear power reactor pressure vessel other than the surfacing area.

[0025] Optionally, profiling the heating inductor based on the outer wall of the surfacing area of the nuclear power reactor pressure vessel through a hydraulic lifting platform and a flexible adjuster includes:

[0026] Adjust the height of the hydraulic lifting platform to move the flexible adjuster towards the outer wall of the surfacing area of the nuclear power reactor pressure vessel;

[0027] Profile the outer wall of the surfacing area through the flexible adjuster;

[0028] Attach the heating inductor to the profiled flexible adjuster to obtain a profiled heating inductor.

[0029] The electromagnetic induction heating device and method provided in this embodiment heat through a heating inductor, avoiding a large amount of heat loss during the heat transfer process, improving the heating efficiency and shortening the heating time. The flexible adjuster for profiling can profile the surfacing area of the nuclear power reactor pressure vessel, enabling the surfacing area to obtain a uniform heating effect. By raising or lowering the hydraulic lifting platform, the heating inductor can be moved closer to or farther away from the outer wall of the surfacing area, facilitating operation and adjustment, and also facilitating other work processes such as equipment maintenance and transportation. Description of the Drawings

[0030] Figure 1 It is a schematic structural diagram of an electromagnetic induction heating device provided by an embodiment of the present invention.

[0031] Figure 2 It is a schematic structural diagram of the heating inductor in the electromagnetic induction heating device provided by an embodiment of the present invention.

[0032] Figure 3 It is a schematic structural diagram of the flexible adjuster in the electromagnetic induction heating device provided by an embodiment of the present invention.

[0033] Figure 4 It is a schematic flow diagram of an electromagnetic induction heating method provided by an embodiment of the present invention.

[0034] Figure 5 It is a schematic structural diagram of profiling in the electromagnetic induction heating method provided by an embodiment of the present invention. Detailed Embodiments

[0035] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following provides a detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings. Although some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments described herein. Instead, these embodiments are provided to more thoroughly and completely understand the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not used to limit the protection scope of the present invention.

[0036] It should be understood that the various steps described in the method embodiments of the present invention can be executed in different orders and / or executed in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this regard.

[0037] As used herein, the term "comprising" and its variations are open-ended, that is, "including but not limited to"; the term "based on" is "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts such as "first" and "second" mentioned in the present invention are only used to distinguish different devices, modules, or units, and are not used to limit the order or interdependence relationship of the functions performed by these devices, modules, or units.

[0038] As Figure 1 shown, an electromagnetic induction heating device provided by an embodiment of the present invention includes: a heating inductor 1 for heating, a flexible adjuster 2 for profiling, and a hydraulic lifting platform 3 for lifting.

[0039] The hydraulic lifting platform 3 is used to drive the flexible adjuster 2 to move towards the outer wall of the surfacing area of the nuclear power reactor pressure vessel. The flexible adjuster 2 is used to profile the outer wall of the surfacing area, and the heating inductor 1 is used to be installed conformally on the flexible adjuster.

[0040] The flexible adjuster 2 is installed on the hydraulic lifting platform 3; the heating inductor 1 is installed on the flexible adjuster 2; the rising of the hydraulic lifting platform 3 drives the flexible adjuster 2 to move towards the outer wall of the surfacing area of the nuclear power reactor pressure vessel, and the flexible adjuster 2 profiles the outer wall of the surfacing area.

[0041] In this embodiment, the hydraulic lifting platform 3 has a scissor structure and is composed of intersecting scissor arms. The scissor arms are connected by a pivot in the middle, forming a structure similar to scissors. When a power device (such as a hydraulic cylinder) pushes or pulls one end of the scissor arms, the angle between the scissor arms changes, thereby realizing the rise and fall of the platform. It can be understood that the scissor structure has high stability and strong load-bearing capacity. It can be used to carry heavy goods or devices.

[0042] As Figure 2 shown, the heating inductor 1 includes: a heat insulation member 11 and a heating cable 12; the heating cable 12 is wound and installed on the heat insulation member 11.

[0043] The heat insulation member 11 is a rectangular sheet structure and is made of a flexible material or a deformable material, so that when the heating inductor 1 is installed on the flexible adjuster 2, it can deform along with the profiling shape of the flexible adjuster 2. The heating cable 12 is a flexible water-cooled induction heating cable 12, and the water-cooled induction heating cable 12 is wound and installed on the sheet-shaped heat insulation member 11.

[0044] Specifically, only one heating inductor 1 can be used, and the heating inductor 1 covers the entire profiler and is connected to all the adjustment units of the profiler, so as to be installed conformally on the flexible adjuster, that is, the heating inductor 1 can be matched with the outer wall shape of the surfacing area of the pressure vessel.

[0045] Alternatively, multiple heating inductors 1 can be provided, and each heating inductor 1 can be correspondingly installed on one or more adjustment units of the profiler. The multiple heating inductors 1 can be distributed respectively following the positions of their corresponding adjustment units, so that the multiple heating inductors 1 can follow the shape of the entire profiler and form the outer wall shape of the surfacing area of the pressure vessel.

[0046] It can be understood that the heating cable 12 can be evenly close to the inner surface and the outer surface of the flat workpiece and the curved workpiece, ensuring uniform heating of the area to be heated.

[0047] As Figure 3 shown, the flexible adjuster 2 includes: a substrate and a profiler. The substrate is installed on the hydraulic lifting platform 3, and the profiler is fixedly connected to the substrate by an angle steel. The profiler is in contact with the surfacing area of the nuclear power reactor pressure vessel, and the profiler profiles the outer shape of the surfacing area. It should be noted that the heating inductor 1 is installed on the profiler, and the surfacing area is heated by the heating inductor 1. The heating inductor 1 can deform along with the profiling shape of the profiler to achieve matching and fitting with the outer wall of the surfacing area.

[0048] The profiling device includes: a plurality of adjusting units arranged at intervals on a substrate, and each adjusting unit includes: a vertical plate 21, a telescopic plate 22, and an angle plate 23; the vertical plate 21 and the telescopic plate 22 have the same length and are installed in a juxtaposed manner. The vertical plate 21 is fixedly connected to the substrate of the flexible adjuster 2. Specifically, the vertical plate 21 is fixedly connected to one side of an angle steel; the other side of the angle steel is fixedly connected to the substrate of the flexible adjuster 2.

[0049] The telescopic plate 22 is connected to the vertical plate 21 by bolts and the vertical position of the telescopic plate 22 relative to the vertical plate 21 is adjustable; the angle plate 23 is installed at one end of the telescopic plate 22. Specifically, vertical waist-shaped holes are provided on the telescopic plate 22, threaded holes are provided on the vertical plate 21, and bolts pass through the waist-shaped holes of the telescopic plate 22 and are screwed into the threaded holes of the vertical plate 21. By adjusting the position of the bolts in the waist-shaped holes of the telescopic plate 22, the telescopic plate 22 can be telescoped up and down relative to the vertical plate 21. After determining the position in the waist-shaped holes, the bolts are tightened to determine the position of the telescopic plate 22. The angle plate 23 is in the shape of a right trapezoid, the right-angled side of the trapezoid is parallel to the substrate surface, the top side is close to the center of the substrate, and the bottom side is close to the edge of the substrate, so that the hypotenuse forms an angle with the substrate. Vertical waist-shaped holes are provided on the angle plate 23, threaded holes are provided on the telescopic plate 22, and bolts pass through the waist-shaped holes of the angle plate 23 and are screwed into the threaded holes of the telescopic plate 22. By adjusting the position of the bolts in the waist-shaped holes on the angle plate 23, the angle plate 23 can be telescoped up and down relative to the telescopic plate 22. After determining the position of the bolts in the waist-shaped holes on the angle plate 23, the bolts are tightened to determine the position of the angle plate 23. By combining the adjustment of the angle and height of the angle plate 23 itself with the up and down adjustment of the telescopic plate 22, profiling of various curved surfaces can be achieved.

[0050] In this embodiment of the electromagnetic induction heating device, heating is performed by a heating inductor, which avoids a large amount of heat loss during the heat transfer process, improves the heating efficiency and shortens the heating time. The flexible adjuster for profiling can profile the surfacing area of the nuclear power reactor pressure vessel, and the heating inductor 1 follows the profiled shape of the profiling device to achieve matching and fitting with the outer wall of the surfacing area, enabling the surfacing area to obtain a uniform heating effect. By raising or lowering the hydraulic lifting platform, the heating inductor can be close to or far from the outer wall of the surfacing area, which is convenient for operation and adjustment and also facilitates other work processes such as equipment maintenance and transportation.

[0051] As Figure 4 shown, an electromagnetic induction heating method based on the above electromagnetic induction heating device provided by an embodiment of the present invention includes:

[0052] S100: Based on the outer wall of the surfacing area of the nuclear power reactor pressure vessel, profile the heating inductor through the hydraulic lifting platform and the flexible adjuster.

[0053] In this step, the hydraulic lifting platform is adjusted to rise. After the hydraulic lifting platform rises, it will drive the flexible adjuster to rise and make the flexible adjuster touch the outer wall of the surfacing area. Adjusting the flexible adjuster can profile the outer wall of the surfacing area. The heating inductor is attached to the profiled flexible adjuster to achieve profiling of the heating inductor.

[0054] The profiling of the heating inductor is to accurately match the shape of the outer wall of the surfacing area of the nuclear power reactor pressure vessel. Since the surfacing area may have various shapes, such as rectangles, irregular polygons, or shapes with a certain curvature, etc., the profiled heating inductor can closely adhere to its outer wall, minimizing the gap between the two to the greatest extent. This can ensure the efficiency of heat transfer, avoid local overheating or insufficient heating due to poor adhesion, and make the preheating temperature evenly distributed throughout the surfacing area.

[0055] As Figure 5 shown, in this embodiment, based on the outer wall of the surfacing area of the nuclear power reactor pressure vessel, the heating inductor is profiled by the hydraulic lifting platform and the flexible adjuster, including:

[0056] Raise the height of the hydraulic lifting platform to move the flexible adjuster on the hydraulic lifting platform towards the outer wall of the surfacing area of the nuclear power reactor pressure vessel. After the flexible adjuster contacts the outer wall of the surfacing area, adjust the flexible adjuster to profile the outer wall of the surfacing area through the flexible adjuster.

[0057] Lower the height of the hydraulic lifting platform, withdraw the flexible adjuster from the outer wall of the surfacing area, and attach the heating inductor to the profiled flexible adjuster. Press the heating inductor to make the heating inductor adhere to the profiled flexible adjuster, so that the heating inductor follows the flexible adjuster to form a profile of the outer wall of the surfacing area, and obtain a profiled heating inductor.

[0058] S200: Attach the profiled heating inductor to the outer wall of the surfacing area of the nuclear power reactor pressure vessel, and preheat the surfacing area through the heating inductor.

[0059] In this step, attach the profiled heating inductor to the outer wall of the surfacing area. Specifically, raise the height of the hydraulic lifting platform to move the flexible adjuster on the hydraulic lifting platform towards the outer wall of the surfacing area of the nuclear power reactor pressure vessel, so that the heating inductor on the profiled flexible adjuster adheres to the outer wall of the surfacing area.

[0060] Start the heating power supply of the heating inductor, adjust the output power of the heating power supply, and preheat the position of the outer wall of the surfacing area of the nuclear power reactor pressure vessel before surfacing.

[0061] The profiled heating inductor is attached to the outer wall of the surfacing area of the nuclear power reactor pressure vessel for preheating treatment, aiming to create good conditions for the surfacing operation. By preheating in advance, the welding performance of the base metal 4 in the surfacing area can be improved, such as reducing the cooling rate, reducing welding stress, avoiding defects such as hard and brittle structures and welding cracks in the weld; at the same time, it also helps to enhance the bonding strength between the surfacing layer 5 (the surfacing layer 5 is the welding material welded in the surfacing area) and the base metal 4, ensuring the surfacing quality and the safety and reliability of the nuclear power reactor pressure vessel during subsequent operation.

[0062] S300: Detect the temperature of the inner wall of the surfacing area of the nuclear power reactor pressure vessel. After the temperature of the inner wall reaches the surfacing temperature, perform surfacing treatment on the inner wall of the surfacing area.

[0063] In this step, while preheating the surfacing area, the temperature of the inner wall of the surfacing area is detected. After the temperature of the inner wall reaches the surfacing temperature or surfacing requirements, perform surfacing treatment on the inner wall of the surfacing area, and at the same time adjust the output power of the heating power supply to ensure that the interlayer temperature of the weld meets the welding requirements.

[0064] It should be noted that by detecting the temperature of the inner wall of the surfacing area of the nuclear power reactor pressure vessel, when the inner wall temperature reaches the appropriate surfacing temperature, good metallurgical bonding between the surfacing material and the base metal can be ensured, avoiding welding defects such as cracks and pores in the weld, and at the same time ensuring that the performance of the surfacing layer 5 meets the design standards, thereby guaranteeing the safety and reliability of the nuclear power reactor pressure vessel during subsequent operation.

[0065] Specifically, a thermocouple thermometer is used to detect the temperature of the inner wall of the surfacing area. The thermocouple thermometer has the advantages of high precision, fast response speed, and being able to adapt to high-temperature environments. During specific operation, the probe of the thermocouple will be installed at key positions on the inner wall of the surfacing area, such as at the center, edge, and shape-changing areas of the surfacing area. The probe needs to have good contact with the inner wall surface to accurately obtain temperature information. Its installation method can be through welding, riveting, or using special fixing jigs, etc., to ensure that the probe will not shift due to factors such as vibration during the surfacing process, affecting the accuracy of temperature measurement.

[0066] S400: After the surfacing treatment is completed, the surfacing area is heated up through the heating inductor. After the temperature of the inner wall reaches the heat treatment temperature, perform heat preservation treatment on the inner wall of the surfacing area.

[0067] In this step, after the surfacing of the surfacing area of the nuclear power reactor pressure vessel is completed, adjust the output power of the heating power supply of the induction heater to heat up the surfacing area. Apply heat to the surfacing area again through the heating inductor, so that the temperature of the surfacing area rises. When the temperature rises, the metal atoms in the surfacing layer 5 and the nearby areas obtain sufficient energy, and the lattice structure will change accordingly. The lattice distortion, dislocations and other defects generated during the surfacing cooling process can be repaired to a certain extent. At the same time, the residual stress will redistribute under the thermal action and gradually decrease, making the stress state of the entire surfacing area more uniform and reasonable.

[0068] After the temperature reaches the post-weld heat treatment temperature, keep it warm. Specifically, cover the surfacing area with heat-insulating cotton to prevent heat dissipation. After the heat treatment time is reached, turn off the induction heating power supply and remove the heating inductor. It should be noted that performing the heating treatment after the surfacing treatment can improve the organizational structure of the surfacing layer 5, eliminate the welding stress generated during the surfacing process, and improve the comprehensive properties of the surfacing layer 5 and the bonding area between the surfacing layer 5 and the base material, such as strength, toughness, fatigue resistance, etc., thereby ensuring the reliability and safety of the nuclear power reactor pressure vessel during subsequent long-term operation.

[0069] Based on the above embodiments of the electromagnetic induction heating method, it further includes:

[0070] Clean the surfacing area of the nuclear power reactor pressure vessel, and use ceramic fiber heat-insulating felt to provide heat insulation protection for the areas of the nuclear power reactor pressure vessel other than the surfacing area.

[0071] In this embodiment, the impurities in the surfacing area will burn or generate harmful gases during the heating process, affecting the heating effect and surfacing quality. It is necessary to clean the surfacing area of the nuclear power reactor pressure vessel. Specifically, it can be cleaned by wiping with organic solvents or mechanical grinding.

[0072] Provide heat insulation protection for the areas that do not need to be heated (areas other than the surfacing area). Specifically, use heat-insulating materials such as ceramic fiber heat-insulating felt for wrapping to prevent heat dissipation, and at the same time avoid adverse effects such as deformation of the areas other than the surfacing area due to heat. The thickness of the heat-insulating felt can be selected according to the actual situation. While ensuring the heat insulation effect, the convenience of installation should also be considered. In this embodiment, the thickness of the heat-insulating station is between a few millimeters and dozens of millimeters.

[0073] As can be seen from the above description, heating the surfacing area of the nuclear power reactor pressure vessel through the heating inductor has the advantages of uniform heating, controllable temperature, and high thermal efficiency. It can not only well realize the heating of the surfacing area of the nuclear power reactor pressure vessel, but also greatly reduce the production cost and effectively improve the production environment.

[0074] Although the present invention has been disclosed as above, the scope of protection of the present invention is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will all fall within the scope of protection of the present invention.

Claims

1. An electromagnetic induction heating device, characterized in that: include: Heating inductors for heating, flexible adjusters for profiling, and hydraulic lifting platforms for lifting; The flexible adjuster is installed on the hydraulic lifting platform; The heating sensor is mounted on the flexible adjuster; The hydraulic lifting platform is used to drive the flexible adjuster to move toward the outer wall of the surfacing area of ​​the nuclear power reactor pressure vessel, the flexible adjuster is used to contour the outer wall of the surfacing area, and the heating sensor is used to be installed on the flexible adjuster in accordance with the shape.

2. The electromagnetic induction heating device according to claim 1, characterized in that: The heating sensor comprises: a heat insulating member and a heating cable; The heating cable is installed on the thermal insulation component after being coiled.

3. The electromagnetic induction heating device according to claim 2, characterized in that: The heat insulating member is a sheet-like structure.

4. The electromagnetic induction heating device according to claim 1, characterized in that: The flexible adjuster comprises: a base plate and a contourer; The base plate is installed on the hydraulic lifting platform; the contourer is fixedly connected to the base plate through angle steel; and the heating sensor is installed on the contourer.

5. The electromagnetic induction heating device according to claim 4, characterized in that: The contourer comprises a plurality of adjustment units arranged at intervals on a base plate, each adjustment unit comprising: a vertical plate, a telescopic plate and an angle plate; The vertical plate is fixedly connected to one side of the angle steel; the other side of the angle steel is fixedly connected to the base plate of the flexible adjuster; the telescopic plate is connected to the vertical plate by bolts and the vertical position of the telescopic plate relative to the vertical plate is adjustable; the angle plate is installed at one end of the telescopic plate.

6. The electromagnetic induction heating device according to claim 5, characterized in that: The telescopic plate is provided with a vertical waist-shaped hole, the vertical plate is provided with a threaded hole, and the bolt passes through the waist-shaped hole of the telescopic plate and is screwed into the threaded hole of the vertical plate.

7. The electromagnetic induction heating device according to claim 5, characterized in that: The angle plate is provided with a vertical waist-shaped hole, the telescopic plate is provided with a threaded hole, and the bolt passes through the waist-shaped hole of the angle plate and is screwed into the threaded hole of the telescopic plate.

8. An electromagnetic induction heating method based on the electromagnetic induction heating device according to any one of claims 1 to 7, characterized in that: include: Based on the outer wall of the cladding area of ​​the nuclear power reactor pressure vessel, the heating inductor is profiled by a hydraulic lifting platform and a flexible adjuster; The heating inductor having been contoured is attached to the outer wall of the surfacing area of ​​the nuclear power reactor pressure vessel, and the surfacing area is preheated by the heating inductor; Detecting the temperature of the inner wall of the surfacing area of ​​the nuclear power reactor pressure vessel, and performing surfacing treatment on the inner wall of the surfacing area after the temperature of the inner wall reaches the surfacing temperature; After the surfacing treatment is completed, the surfacing area is subjected to a temperature increase treatment through the heating sensor, and after the temperature of the inner wall reaches the heat treatment temperature, the inner wall of the surfacing area is subjected to a heat preservation treatment.

9. The electromagnetic induction heating method according to claim 8, characterized in that: Before profiling the heating inductor, the method further comprises: The cladding area of ​​the nuclear power reactor pressure vessel is cleaned, and the area other than the cladding area on the nuclear power reactor pressure vessel is insulated and protected by ceramic fiber insulation felt.

10. The electromagnetic induction heating method according to claim 8 or 9, characterized in that: The outer wall of the surfacing area of ​​the nuclear power reactor pressure vessel is subjected to profiling of the heating inductor by means of a hydraulic lifting platform and a flexible adjuster, including: Adjusting the height of the hydraulic lifting platform so that the flexible adjuster moves toward the outer wall of the surfacing area of ​​the nuclear power reactor pressure vessel; Profiling the outer wall of the surfacing area by means of the flexible adjuster; The heating inductor is attached to the contoured flexible adjuster to obtain a contoured heating inductor.

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