Nuclear reactor pressure vessel bolt hole surfacing heating device and method

Abstract

The invention provides a nuclear reactor pressure vessel bolt hole surfacing heating device and method, and relates to the technical field of heating equipment, the nuclear reactor pressure vessel bolt hole surfacing heating device comprises a first electromagnetic induction heating device, a second electromagnetic induction heating device and a support cross beam; the two ends of the supporting cross beam are in sliding connection with the first electromagnetic induction heating device and the second electromagnetic induction heating device correspondingly. The curvature of the end face, facing the outer wall of the nuclear reactor pressure vessel, of the first electromagnetic induction heating device is configured to be matched with the curvature of the outer wall of the nuclear reactor pressure vessel; the curvature of the end face, facing the inner wall of the nuclear reactor pressure vessel, of the second electromagnetic induction heating device is configured to be matched with the curvature of the inner wall of the nuclear reactor pressure vessel. The surfacing heating device for the bolt hole of the nuclear reactor pressure vessel can effectively solve the problem that the heat efficiency is low when the bolt hole of the nuclear reactor pressure vessel is heated.

Description

Technical Field

[0001] The invention relates to the technical field of heating equipment, and in particular to a device and method for heating bolt holes of a nuclear reactor pressure vessel. Background Art

[0002] At present, nuclear reactor pressure vessels are important equipment in nuclear power plants. The quality of the cladding of the main bolt holes is related to whether the reactor pressure vessels can be normally opened and closed. Therefore, during production, austenitic stainless steel is usually clad on the inner wall of the main bolt holes on the nuclear reactor pressure vessels near the hole opening to cope with the aging or deterioration of the stainless steel that may be caused by long-term operation.

[0003] In the prior art, when performing cladding operation at the bolt holes of nuclear reactor pressure vessels, the cladding position needs to be heated. The traditional heating method is gas combustion heating, which has low heating efficiency. Summary of the invention

[0004] The problem solved by the invention is how to improve the problem of low thermal efficiency of the bolt holes of the nuclear reactor pressure vessel during heating.

[0005] In a first aspect, the present invention provides a nuclear reactor pressure vessel bolt hole surfacing heating device, comprising a first electromagnetic induction heating device, a second electromagnetic induction heating device and a supporting beam; the two ends of the supporting beam are respectively slidably connected to the first electromagnetic induction heating device and the second electromagnetic induction heating device; the first electromagnetic induction heating device and the second electromagnetic induction heating device are configured to jointly heat the bolt hole located therebetween; the curvature of the end face of the first electromagnetic induction heating device facing the outer wall of the nuclear reactor pressure vessel is configured to match the curvature of the outer wall of the nuclear reactor pressure vessel; the curvature of the end face of the second electromagnetic induction heating device facing the inner wall of the nuclear reactor pressure vessel is configured to match the curvature of the inner wall of the nuclear reactor pressure vessel.

[0006] Optionally, the nuclear reactor pressure vessel bolt hole surfacing heating device also includes a first fastener; both ends of the support beam are respectively provided with a first waist-shaped hole penetrating therethrough; the first electromagnetic induction heating device and the second electromagnetic induction heating device are both provided with a first connecting hole; the first fastener passes through the first waist-shaped hole and is connected to the first connecting hole, so that the support beam is connected to the first electromagnetic induction heating device or the second electromagnetic induction heating device.

[0007] Optionally, the nuclear reactor pressure vessel bolt hole surfacing heating device further comprises a first rolling member, which is rotatably connected to the supporting beam, and is configured to be in rolling contact with an end face of the nuclear reactor pressure vessel in which the bolt hole is opened.

[0008] Optionally, the nuclear reactor pressure vessel bolt hole surfacing heating device also includes a second rolling member; the first electromagnetic induction heating device and the second electromagnetic induction heating device are both rotatably connected to the second rolling member; the second rolling member on the first electromagnetic induction heating device is configured to be in rolling contact with the outer wall of the nuclear reactor pressure vessel; the second rolling member on the second electromagnetic induction heating device is configured to be in rolling contact with the inner wall of the nuclear reactor pressure vessel.

[0009] Optionally, the second rolling members are respectively connected to two opposite side ends of the first electromagnetic induction heating device; and / or the second rolling members are respectively connected to two opposite side ends of the second electromagnetic induction heating device.

[0010] Optionally, the second rolling member on the first electromagnetic induction heating device is configured to slide relative to the first electromagnetic induction heating device to adjust the distance between the first electromagnetic induction heating device and the outer wall of the nuclear reactor pressure vessel;

[0011] And / or, the second rolling member on the second electromagnetic induction heating device is configured to slide relative to the second electromagnetic induction heating device to adjust the distance between the second electromagnetic induction heating device and the inner wall of the nuclear reactor pressure vessel.

[0012] Optionally, the nuclear reactor pressure vessel bolt hole surfacing heating device also includes a first bracket and a second fastener; a second waist-shaped hole is provided at one end of the first bracket; a second connecting hole is provided on the first electromagnetic induction heating device or the second electromagnetic induction heating device; the second fastener passes through the second waist-shaped hole and is connected to the second connecting hole, so that the first bracket is connected to the first electromagnetic induction heating device or the second electromagnetic induction heating device.

[0013] Optionally, the first electromagnetic induction heating device includes a first mounting frame and an air-cooled induction heating cable; the air-cooled induction heating cable is coiled in the first mounting frame; the curvature of the end face of the first mounting frame facing the outer wall of the nuclear reactor pressure vessel is configured to match the curvature of the outer wall of the nuclear reactor pressure vessel; the first mounting frame is connected to the supporting beam.

[0014] Optionally, the second electromagnetic induction heating device includes a second mounting frame and a water-cooled induction heating cable; the water-cooled induction heating cable is coiled in the second mounting frame; the curvature of the end face of the second mounting frame facing the inner wall of the nuclear reactor pressure vessel is configured to match the curvature of the inner wall of the nuclear reactor pressure vessel; the second mounting frame is connected to the supporting beam.

[0015] In a second aspect, the present invention provides a method for heating a bolt hole of a nuclear reactor pressure vessel by surfacing welding, using the above-mentioned nuclear reactor pressure vessel bolt hole surfacing welding heating device, comprising:

[0016] Installing at least one of the nuclear reactor pressure vessel bolt hole surfacing heating devices on the nuclear reactor pressure vessel so that the first electromagnetic induction heating device faces the outer wall of the nuclear reactor pressure vessel and the second electromagnetic induction heating device faces the inner wall of the nuclear reactor pressure vessel;

[0017] Adjusting the fixed positions of the first electromagnetic induction heating device and the second electromagnetic induction heating device on the supporting crossbeam so that the distance between the first electromagnetic induction heating device and the outer wall of the nuclear reactor pressure vessel reaches a first preset distance, and the distance between the second electromagnetic induction heating device and the inner wall of the nuclear reactor pressure vessel reaches a second preset distance;

[0018] Controlling the first electromagnetic induction heating device and the second electromagnetic induction heating device to be powered on, so that the first electromagnetic induction heating device and the second electromagnetic induction heating device jointly heat the bolt hole located therebetween;

[0019] When the temperature of the position to be built-up welded on the inner wall of the bolt hole reaches the build-up weld temperature, build-up weld is performed at the position to be built-up welded on the bolt hole, and the first electromagnetic induction heating device and the second electromagnetic induction heating device are urged to maintain the welding interlayer temperature;

[0020] After the surfacing welding of the bolt hole to be surfacing welded is completed, adjusting the temperature of the first electromagnetic induction heating device and the second electromagnetic induction heating device to a post-weld heat treatment temperature, and performing heat preservation;

[0021] After the preset heat preservation time, the nuclear reactor pressure vessel bolt hole surfacing heating device is removed from the nuclear reactor pressure vessel.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] The two ends of the supporting crossbeam are respectively slidably connected to the first electromagnetic induction heating device and the second electromagnetic induction heating device, so that the positions of the first electromagnetic induction heating device and the second electromagnetic induction heating device can be adjusted on the supporting crossbeam, and the nuclear reactor pressure vessel with different wall thicknesses can be adapted, so that the first electromagnetic induction heating device and the outer wall of the nuclear reactor pressure vessel are kept at a suitable distance, and the second electromagnetic induction heating device and the inner wall of the nuclear reactor pressure vessel are kept at a suitable distance, so as to facilitate effective heating of the first electromagnetic induction heating device and the second electromagnetic induction heating device; the first electromagnetic induction heating device and the second electromagnetic induction heating device are configured as The bolt hole located between the two is heated together, wherein the curvature of the end face of the first electromagnetic induction heating device facing the outer wall of the nuclear reactor pressure vessel is configured to match the curvature of the outer wall of the nuclear reactor pressure vessel, so that when the first electromagnetic induction heating device is heating, the outer wall of the nuclear reactor pressure vessel can be uniformly heated, thereby effectively improving the heating efficiency; the curvature of the end face of the second electromagnetic induction heating device facing the inner wall of the nuclear reactor pressure vessel is configured to match the curvature of the inner wall of the nuclear reactor pressure vessel, so that when the second electromagnetic induction heating device is heating, the inner wall of the nuclear reactor pressure vessel can be uniformly heated, thereby effectively improving the heating efficiency. In summary, the nuclear reactor pressure vessel bolt hole surfacing heating device of the present invention can effectively improve the problem of low thermal efficiency of the nuclear reactor pressure vessel bolt hole when heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The structure of the heating device for surfacing welding bolt holes of a nuclear reactor pressure vessel according to the embodiment of the present invention is shown in FIG. Figure 1 ;

[0025] Figure 2 The structure of the heating device for surfacing welding bolt holes of a nuclear reactor pressure vessel according to the embodiment of the present invention is shown in FIG. Figure 2 ;

[0026] Figure 3 It is an explosion schematic diagram of a nuclear reactor pressure vessel bolt hole surfacing heating device according to an embodiment of the present invention;

[0027] Figure 4 A diagram showing the use status of the nuclear reactor pressure vessel bolt hole cladding heating device according to an embodiment of the present invention;

[0028] Figure 5 The present invention is a schematic flow chart of a method for heating a bolt hole of a nuclear reactor pressure vessel according to an embodiment of the present invention.

[0029] Description of reference numerals:

[0030] 100, first electromagnetic induction heating device; 101, first mounting frame; 102, air-cooled induction heating cable; 200, second electromagnetic induction heating device; 201, second mounting frame; 202, water-cooled induction heating cable; 300, supporting beam; 301, first waist-shaped hole; 400, first fastener; 500, first rolling member; 600, second rolling member; 700, first bracket; 701, second waist-shaped hole; 800, second fastener; 900, first connecting hole; 110, second connecting hole; 120, first matching member; 130, second matching member; 140, nuclear reactor pressure vessel; 150, bolt hole. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be interpreted as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0032] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to"; the term "based on" means "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other 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 of "first", "second", etc. 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 of the functions performed by these devices, modules or units.

[0033] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0034] like Figure 1 , 2As shown, an embodiment of the present invention provides a nuclear reactor pressure vessel bolt hole surfacing heating device, comprising a first electromagnetic induction heating device 100, a second electromagnetic induction heating device 200 and a supporting beam 300; the two ends of the supporting beam 300 are respectively slidably connected to the first electromagnetic induction heating device 100 and the second electromagnetic induction heating device 200; the first electromagnetic induction heating device 100 and the second electromagnetic induction heating device 200 are configured to jointly heat the bolt hole 150 located therebetween; the curvature of the end face of the first electromagnetic induction heating device 100 facing the outer wall of the nuclear reactor pressure vessel 140 is configured to match the curvature of the outer wall of the nuclear reactor pressure vessel 140; the curvature of the end face of the second electromagnetic induction heating device 200 facing the inner wall of the nuclear reactor pressure vessel 140 is configured to match the curvature of the inner wall of the nuclear reactor pressure vessel 140.

[0035] Specifically, the support beam 300 is in the shape of a long strip, and its two ends in the long end direction are slidably connected to the first electromagnetic induction heating device 100 and the second electromagnetic induction heating device 200 respectively; in this way, the positions of the first electromagnetic induction heating device 100 and the second electromagnetic induction heating device 200 can be adjusted on the support beam 300, and the nuclear reactor pressure vessel 140 with different wall thicknesses can be adapted, so that the first electromagnetic induction heating device 100 and the outer wall of the nuclear reactor pressure vessel 140 are kept at a suitable distance, and the second electromagnetic induction heating device 200 and the inner wall of the nuclear reactor pressure vessel 140 are kept at a suitable distance, so as to facilitate the effective heating of the first electromagnetic induction heating device 100 and the second electromagnetic induction heating device 200.

[0036] Specifically, after the nuclear reactor pressure vessel bolt hole cladding heating device is installed on the nuclear reactor pressure vessel 140, the entire device straddles the nuclear reactor pressure vessel 140, and the effect is as follows: Figure 4As shown; at this time, the first electromagnetic induction heating device 100 is located on the outside of the nuclear reactor pressure vessel 140 and faces the outer wall of the nuclear reactor pressure vessel 140; the second electromagnetic induction heating device 200 is located on the inside of the nuclear reactor pressure vessel 140 and faces the inner wall of the nuclear reactor pressure vessel 140; the first electromagnetic induction heating device 100 and the second electromagnetic induction heating device 200 are configured to jointly heat the bolt hole 150 located therebetween, wherein the curvature of the end face of the first electromagnetic induction heating device 100 facing the outer wall of the nuclear reactor pressure vessel 140 is configured The first electromagnetic induction heating device 100 is configured to match the curvature of the outer wall of the nuclear reactor pressure vessel 140, so that when the first electromagnetic induction heating device 100 is heating, the outer wall of the nuclear reactor pressure vessel 140 can be evenly heated, thereby effectively improving the heating efficiency; the curvature of the end face of the second electromagnetic induction heating device 200 facing the inner wall of the nuclear reactor pressure vessel 140 is configured to match the curvature of the inner wall of the nuclear reactor pressure vessel 140, so that when the second electromagnetic induction heating device 200 is heating, the inner wall of the nuclear reactor pressure vessel 140 can be evenly heated, thereby effectively improving the heating efficiency.

[0037] In summary, the nuclear reactor pressure vessel bolt hole cladding heating device of this embodiment can effectively improve the problem of low thermal efficiency when heating the bolt holes 150 of the nuclear reactor pressure vessel 140.

[0038] In this embodiment, there is no limit on the number of supporting beams 300, and the number can be one, two, or three, etc., which is not limited here and depends on actual needs.

[0039] Optionally, the nuclear reactor pressure vessel bolt hole surfacing heating device also includes a first fastener 400; both ends of the support beam 300 are respectively provided with a first waist-shaped hole 301 penetrating therethrough; the first electromagnetic induction heating device 100 and the second electromagnetic induction heating device 200 are both provided with a first connecting hole 900; the first fastener 400 passes through the first waist-shaped hole 301 and is connected to the first connecting hole 900, so that the support beam 300 is connected to the first electromagnetic induction heating device 100 or the second electromagnetic induction heating device 200.

[0040] like Figure 3As shown, the support beam 300 is in the shape of an elongated strip, and a first waist-shaped hole 301 is respectively provided at both ends of the length direction thereof, and the extension direction of the first waist-shaped hole 301 is parallel to the length direction of the support beam 300; the tops of the first electromagnetic induction heating device 100 and the second electromagnetic induction heating device 200 are both provided with a first matching piece 120, and the first matching piece 120 is provided with a first connecting hole 900, and the first connecting hole 900 is a threaded hole; the first fastener 400 is a bolt, which passes through the first waist-shaped hole 301 and is threadedly connected to the first connecting hole 900, so that the support beam 300 is connected to the first electromagnetic induction heating device 100 or the second electromagnetic induction heating device 200.

[0041] In this optional embodiment, the design of the first waist-shaped hole 301 on the supporting beam 300 not only facilitates the passage of the first fastener 400, but also enables the position of the first electromagnetic induction heating device 100 or the second electromagnetic induction heating device 200 on the supporting beam 300 to be changed by adjusting the relative position relationship between the first waist-shaped hole 301 and the first fastener 400.

[0042] In other embodiments, the first electromagnetic induction heating device 100 and the second electromagnetic induction heating device 200 can be slidably connected with the supporting beam 300 by using a T-shaped slider and a T-shaped groove, and locked by static friction.

[0043] Optionally, the nuclear reactor pressure vessel bolt hole surfacing heating device also includes a first rolling member 500, which is rotatably connected to the supporting beam 300, and the first rolling member 500 is configured to roll in contact with the end face of the nuclear reactor pressure vessel 140 where the bolt hole 150 is opened.

[0044] Specifically, the number of the first rolling element 500 can be one, two, or three, etc., which is not limited here and depends on actual needs. Figure 3 As shown, the first rolling member 500 is a roller, and there are two of them. The two first rolling members 500 are rotatably disposed on the lower end surface of the supporting beam 300 .

[0045] In this optional embodiment, after the nuclear reactor pressure vessel bolt hole welding heating device is installed, the first rolling member 500 can be in rolling contact with the end face of the nuclear reactor pressure vessel 140 where the bolt hole 150 is opened. For example, when the bolt hole 150 is opened on the upper end face of the nuclear reactor pressure vessel 140, the supporting beam 300 can be supported on the upper end face of the nuclear reactor pressure vessel 140 through the first rolling member 500. Since the first rolling member 500 can be in rolling contact with the end face of the nuclear reactor pressure vessel 140 where the bolt hole 150 is opened, the friction between the two can be effectively reduced, which facilitates the subsequent movement of the nuclear reactor pressure vessel bolt hole welding heating device on the nuclear reactor pressure vessel 140.

[0046] Optionally, the nuclear reactor pressure vessel bolt hole surfacing heating device also includes a second rolling member 600; the first electromagnetic induction heating device 100 and the second electromagnetic induction heating device 200 are both rotatably connected with the second rolling member 600; the second rolling member 600 on the first electromagnetic induction heating device 100 is configured to be in rolling contact with the outer wall of the nuclear reactor pressure vessel 140; the second rolling member 600 on the second electromagnetic induction heating device 200 is configured to be in rolling contact with the inner wall of the nuclear reactor pressure vessel 140.

[0047] In this optional embodiment, the second rolling member 600 is a roller; due to the presence of the second rolling member 600, stable support of the first electromagnetic induction heating device 100 and the second electromagnetic induction heating device 200 can be achieved to reduce the probability of shaking of the first electromagnetic induction heating device 100 and the second electromagnetic induction heating device 200, and at the same time, in conjunction with the first rolling member 500 on the supporting beam 300, reliable movement of the nuclear reactor pressure vessel bolt hole welding heating device can be achieved.

[0048] Optionally, the second rolling members 600 are respectively connected to two opposite side ends of the first electromagnetic induction heating device 100 ; and / or the second rolling members 600 are respectively connected to two opposite side ends of the second electromagnetic induction heating device 200 .

[0049] Specifically, Figure 3 As shown, the first electromagnetic induction heating device 100 and the second electromagnetic induction heating device 200 are both generally in an arc-shaped plate structure; the second rolling members 600 are respectively provided at both side ends along the circumferential direction. In this way, when the nuclear reactor pressure vessel bolt hole surfacing heating device is moved on the nuclear reactor pressure vessel 140, the second rolling members 600 on the first electromagnetic induction heating device 100 and the second electromagnetic induction heating device 200 can achieve stable movement.

[0050] In other embodiments, second rolling members 600 may also be provided at the upper and lower ends of the first electromagnetic induction heating device 100 and the second electromagnetic induction heating device 200 .

[0051] Optionally, the second rolling member 600 on the first electromagnetic induction heating device 100 is configured to slide relative to the first electromagnetic induction heating device 100 to adjust the distance between the first electromagnetic induction heating device 100 and the outer wall of the nuclear reactor pressure vessel 140;

[0052] And / or, the second rolling member 600 on the second electromagnetic induction heating device 200 is configured to slide relative to the second electromagnetic induction heating device 200 to adjust the distance between the second electromagnetic induction heating device 200 and the inner wall of the nuclear reactor pressure vessel 140 .

[0053] In this optional embodiment, the second rolling member 600 on the first electromagnetic induction heating device 100 is slidably connected to the first electromagnetic induction heating device 100, and can move toward or away from the outer wall of the nuclear reactor pressure vessel 140 to adjust the distance between the first electromagnetic induction heating device 100 and the outer wall of the nuclear reactor pressure vessel 140. The second rolling member 600 on the second electromagnetic induction heating device 200 is slidably connected to the second electromagnetic induction heating device 200, and can move toward or away from the inner wall of the nuclear reactor pressure vessel 140, thereby adjusting the distance between the second electromagnetic induction heating device 200 and the inner wall of the nuclear reactor pressure vessel 140.

[0054] Optionally, the nuclear reactor pressure vessel bolt hole surfacing heating device also includes a first bracket 700 and a second fastener 800; one end of the first bracket 700 is provided with a second waist-shaped hole 701 penetrating therethrough; the first bracket 700 is rotatably connected to the second rolling member 600; the first electromagnetic induction heating device 100 or the second electromagnetic induction heating device 200 is provided with a second connecting hole 110; the second fastener 800 passes through the second waist-shaped hole 701 and is connected to the second connecting hole 110, so that the first bracket 700 is connected to the first electromagnetic induction heating device 100 or the second electromagnetic induction heating device 200.

[0055] Specifically, the first bracket 700 is L-shaped, and its longer section is provided with a second waist-shaped hole 701 penetrating therethrough, and its shorter section is rotatably connected with the second rolling member 600; the circumferential side ends of the first electromagnetic induction heating device 100 and the second electromagnetic induction heating device 200 are both provided with a second matching piece 130, and the first matching piece 120 is provided with a second connecting hole 110, and the second connecting hole 110 is a threaded hole; the second fastener 800 is a bolt, which passes through the second waist-shaped hole 701 and is threadedly connected to the second connecting hole 110, so that the first bracket 700 is connected to the first electromagnetic induction heating device 100 or the second electromagnetic induction heating device 200.

[0056] In this optional embodiment, the design of the waist-shaped hole on the first bracket 700 not only facilitates the passage of the second fastener 800; moreover, by adjusting the relative position relationship between the second waist-shaped hole 701 and the second fastener 800, the position of the first bracket 700 on the first electromagnetic induction heating device 100 or the second electromagnetic induction heating device 200 can be changed, thereby prompting the change of the position of the second rolling member 600, and finally achieving the purpose of adjusting the distance between the first electromagnetic induction heating device 100 and the second electromagnetic induction heating device 200.

[0057] In other embodiments, the first bracket 700 can be slidably connected with the first electromagnetic induction heating device 100 or the second electromagnetic induction heating device 200 by using a T-shaped slider and a T-shaped slot, and locked by static friction.

[0058] Optionally, the first electromagnetic induction heating device 100 includes a first mounting frame 101 and an air-cooled induction heating cable 102; the air-cooled induction heating cable 102 is coiled in the first mounting frame 101; the curvature of the end face of the first mounting frame 101 facing the outer wall of the nuclear reactor pressure vessel 140 is configured to match the curvature of the outer wall of the nuclear reactor pressure vessel 140; the first mounting frame 101 is connected to the supporting beam 300.

[0059] Optionally, the second electromagnetic induction heating device 200 includes a second mounting frame 201 and a water-cooled induction heating cable 202; the water-cooled induction heating cable 202 is coiled in the second mounting frame 201; the curvature of the end face of the second mounting frame 201 facing the inner wall of the nuclear reactor pressure vessel 140 is configured to match the curvature of the inner wall of the nuclear reactor pressure vessel 140; the second mounting frame 201 is connected to the supporting beam 300.

[0060] The embodiment of the present invention provides a method for heating a bolt hole of a nuclear reactor pressure vessel by surfacing welding, and the device for heating a bolt hole of a nuclear reactor pressure vessel by surfacing welding is used. Figure 5 As shown, including:

[0061] S100, installing at least one of the nuclear reactor pressure vessel bolt hole cladding heating devices on the nuclear reactor pressure vessel 140, so that the first electromagnetic induction heating device 100 faces the outer wall of the nuclear reactor pressure vessel 140, and the second electromagnetic induction heating device 200 faces the inner wall of the nuclear reactor pressure vessel 140;

[0062] In this embodiment, the number of the nuclear reactor pressure vessel bolt hole cladding heating devices is not specifically limited and is determined according to actual needs. After the nuclear reactor pressure vessel bolt hole cladding heating device is installed on the nuclear reactor pressure vessel 140, it straddles the nuclear reactor pressure vessel 140 as a whole. At this time, the first electromagnetic induction heating device 100 is located on the outside of the nuclear reactor pressure vessel 140 and faces the outer wall of the nuclear reactor pressure vessel 140; the second electromagnetic induction heating device 200 is located on the inside of the nuclear reactor pressure vessel 140 and faces the inner wall of the nuclear reactor pressure vessel 140.

[0063] S200, adjusting the fixed positions of the first electromagnetic induction heating device 100 and the second electromagnetic induction heating device 200 on the supporting crossbeam 300 so that the distance between the first electromagnetic induction heating device 100 and the outer wall of the nuclear reactor pressure vessel 140 reaches a first preset distance, and the distance between the second electromagnetic induction heating device 200 and the inner wall of the nuclear reactor pressure vessel 140 reaches a second preset distance;

[0064] In this embodiment, after the nuclear reactor pressure vessel bolt hole cladding heating device is installed on the nuclear reactor pressure vessel 140, it is necessary to adjust the positions of the first electromagnetic induction heating device 100 and the second electromagnetic induction heating device 200 so that the distance between the first electromagnetic induction heating device 100 and the outer wall of the nuclear reactor pressure vessel 140 reaches a first preset distance, and the distance between the second electromagnetic induction heating device 200 and the inner wall of the nuclear reactor pressure vessel 140 reaches a second preset distance, so as to achieve reliable heating; wherein the first preset distance and the second preset distance can generally be 0 to 2 cm.

[0065] S300, controlling the first electromagnetic induction heating device 100 and the second electromagnetic induction heating device 200 to be powered on, so that the first electromagnetic induction heating device 100 and the second electromagnetic induction heating device 100 jointly heat the bolt hole 150 located therebetween;

[0066] In this embodiment, the first electromagnetic induction heating device 100 heats the outer wall of the nuclear reactor pressure vessel 140. Since the outer wall of the nuclear reactor pressure vessel 140 is made of low alloy steel, the first electromagnetic induction heating device 100 needs to be connected to an induction heating power supply made of carbon steel; the second electromagnetic induction heating device 200 heats the inner wall of the nuclear reactor pressure vessel 140. Since the inner wall of the nuclear reactor pressure vessel 140 is made of stainless steel, the second electromagnetic induction heating device 200 needs to be connected to an induction heating power supply made of stainless steel.

[0067] S400, when the temperature of the position to be built-up welded on the inner wall of the bolt hole 150 reaches the build-up weld temperature, build-up weld is performed at the position to be built-up welded on the bolt hole 150, and the first electromagnetic induction heating device 100 and the second electromagnetic induction heating device 200 are urged to maintain the welding interlayer temperature;

[0068] In this embodiment, the surfacing temperature is 350 degrees; the temperature between welding layers ranges from 150 to 250 degrees.

[0069] S500, after the surfacing welding is completed at the position of the bolt hole 150 to be surfacing welded, the temperature of the first electromagnetic induction heating device 100 and the second electromagnetic induction heating device 200 are adjusted to the post-weld heat treatment temperature, and the temperatures are kept warm;

[0070] In this embodiment, the post-weld heat treatment temperature ranges from 250 to 350 degrees. The heat preservation method is to use heat insulation cotton to cover the welded parts to prevent heat loss.

[0071] S600, after the preset insulation time, the nuclear reactor pressure vessel bolt hole cladding heating device is removed from the nuclear reactor pressure vessel 140.

[0072] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A nuclear reactor pressure vessel bolt hole surfacing heating device, characterized in that: The invention comprises a first electromagnetic induction heating device (100), a second electromagnetic induction heating device (200) and a supporting crossbeam (300); the two ends of the supporting crossbeam (300) are respectively slidably connected to the first electromagnetic induction heating device (100) and the second electromagnetic induction heating device (200); the first electromagnetic induction heating device (100) and the second electromagnetic induction heating device (200) are configured to jointly heat a bolt hole (150) located therebetween; the curvature of the end surface of the first electromagnetic induction heating device (100) facing the outer wall of a nuclear reactor pressure vessel (140) is configured to match the curvature of the outer wall of the nuclear reactor pressure vessel (140); the curvature of the end surface of the second electromagnetic induction heating device (200) facing the inner wall of the nuclear reactor pressure vessel (140) is configured to match the curvature of the inner wall of the nuclear reactor pressure vessel (140).

2. The nuclear reactor pressure vessel bolt hole surfacing heating device according to claim 1, characterized in that: The invention also comprises a first fastener (400); two ends of the support beam (300) are respectively provided with first waist-shaped holes (301) passing through; the first electromagnetic induction heating device (100) and the second electromagnetic induction heating device (200) are both provided with a first connecting hole (900); the first fastener (400) passes through the first waist-shaped hole (301) and is connected to the first connecting hole (900), so that the support beam (300) is connected to the first electromagnetic induction heating device (100) or the second electromagnetic induction heating device (200).

3. The nuclear reactor pressure vessel bolt hole surfacing heating device according to claim 1, characterized in that: It also includes a first rolling member (500), which is rotatably connected to the supporting beam (300), and the first rolling member (500) is configured to be in rolling contact with the end surface of the nuclear reactor pressure vessel (140) where the bolt hole (150) is opened.

4. The nuclear reactor pressure vessel bolt hole surfacing heating device according to claim 1, characterized in that: The invention also comprises a second rolling member (600); the first electromagnetic induction heating device (100) and the second electromagnetic induction heating device (200) are both rotatably connected with the second rolling member (600); the second rolling member (600) on the first electromagnetic induction heating device (100) is configured to be in rolling contact with the outer wall of the nuclear reactor pressure vessel (140); and the second rolling member (600) on the second electromagnetic induction heating device (200) is configured to be in rolling contact with the inner wall of the nuclear reactor pressure vessel (140).

5. The nuclear reactor pressure vessel bolt hole surfacing heating device according to claim 4, characterized in that: The second rolling member (600) is respectively connected to two opposite side ends of the first electromagnetic induction heating device (100); and / or the second rolling member (600) is respectively connected to two opposite side ends of the second electromagnetic induction heating device (200).

6. The nuclear reactor pressure vessel bolt hole surfacing heating device according to claim 4 or 5, characterized in that: The second rolling element (600) on the first electromagnetic induction heating device (100) is configured to slide relative to the first electromagnetic induction heating device (100) to adjust the distance between the first electromagnetic induction heating device (100) and the outer wall of the nuclear reactor pressure vessel (140); And / or, the second rolling member (600) on the second electromagnetic induction heating device (200) is configured to slide relative to the second electromagnetic induction heating device (200) to adjust the distance between the second electromagnetic induction heating device (200) and the inner wall of the nuclear reactor pressure vessel (140).

7. The nuclear reactor pressure vessel bolt hole surfacing heating device according to claim 6, characterized in that: The invention also comprises a first bracket (700) and a second fastener (800); one end of the first bracket (700) is provided with a second waist-shaped hole (701) passing through the first bracket; the first electromagnetic induction heating device (100) or the second electromagnetic induction heating device (200) is provided with a second connecting hole (110); the second fastener (800) passes through the second waist-shaped hole (701) and is connected to the second connecting hole (110), so that the first bracket (700) is connected to the first electromagnetic induction heating device (100) or the second electromagnetic induction heating device (200).

8. The nuclear reactor pressure vessel bolt hole surfacing heating device according to claim 1, characterized in that: The first electromagnetic induction heating device (100) comprises a first mounting frame (101) and an air-cooled induction heating cable (102); the air-cooled induction heating cable (102) is coiled in the first mounting frame (101); the curvature of the end surface of the first mounting frame (101) facing the outer wall of the nuclear reactor pressure vessel (140) is configured to match the curvature of the outer wall of the nuclear reactor pressure vessel (140); the first mounting frame (101) is slidably connected to the supporting crossbeam (300).

9. The nuclear reactor pressure vessel bolt hole surfacing heating device according to claim 1, characterized in that: The second electromagnetic induction heating device (200) comprises a second mounting frame (201) and a water-cooled induction heating cable (202); the water-cooled induction heating cable (202) is coiled in the second mounting frame (201); the curvature of the end surface of the second mounting frame (201) facing the inner wall of the nuclear reactor pressure vessel (140) is configured to match the curvature of the inner wall of the nuclear reactor pressure vessel (140); the second mounting frame (201) is slidably connected to the supporting beam (300).

10. A method for heating a bolt hole of a nuclear reactor pressure vessel by surfacing welding, using the nuclear reactor pressure vessel bolt hole surfacing welding heating device as claimed in any one of claims 1 to 9, characterized in that: include: Installing at least one of the nuclear reactor pressure vessel bolt hole cladding heating devices on the nuclear reactor pressure vessel (140) so that the first electromagnetic induction heating device (100) faces the outer wall of the nuclear reactor pressure vessel (140) and the second electromagnetic induction heating device (200) faces the inner wall of the nuclear reactor pressure vessel (140); Adjusting the fixed positions of the first electromagnetic induction heating device (100) and the second electromagnetic induction heating device (200) on the supporting crossbeam (300) so that the distance between the first electromagnetic induction heating device (100) and the outer wall of the nuclear reactor pressure vessel (140) reaches a first preset distance, and the distance between the second electromagnetic induction heating device (200) and the inner wall of the nuclear reactor pressure vessel (140) reaches a second preset distance; Controlling the first electromagnetic induction heating device (100) and the second electromagnetic induction heating device (200) to be powered on, so that the first electromagnetic induction heating device (100) and the second electromagnetic induction heating device (100) jointly heat the bolt hole (150) located therebetween; When the temperature of the position to be built-up welded on the inner wall of the bolt hole (150) reaches the build-up weld temperature, build-up weld is performed at the position to be built-up welded on the bolt hole (150), and the first electromagnetic induction heating device (100) and the second electromagnetic induction heating device (200) are urged to maintain the welding interlayer temperature; After the surfacing welding of the position to be surfacing welded of the bolt hole (150) is completed, adjusting the temperature of the first electromagnetic induction heating device (100) and the second electromagnetic induction heating device (200) to a post-weld heat treatment temperature, and performing heat preservation; After the preset heat preservation time, the nuclear reactor pressure vessel bolt hole surfacing heating device is removed from the nuclear reactor pressure vessel (140).

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