Steel containment mounting weld heat treatment device

Abstract

This invention discloses a heat treatment device for weld seams in steel containment structures, relating to the field of welding technology. It includes a base and a telescopic component fixedly disposed at its end, with a support plate fixedly disposed at the end of the telescopic component. A pressing compensation assembly, assembled on the upper end of the support plate, includes a heating plate and a locking shaft and a locking block for applying pressure toward the weld surface. This heat treatment device for steel containment structures achieves precise pressing and contact through the pressing compensation assembly, ensuring that the heating element acts only on the weld seam and heat-affected zone, avoiding unnecessary heating of non-welded areas. Simultaneously, it can adjust the contact state between the heating element and the weld seam in real time, effectively preventing localized overheating and burn-through caused by poor connections. Furthermore, by precisely controlling the temperature to heat only the required weld area, energy utilization efficiency can be improved, reducing energy waste.

Description

Technical Field

[0001] This invention relates to welding technology, and more specifically to a heat treatment apparatus for weld seams in steel containment structures. Background Technology

[0002] The steel containment vessel is a crucial barrier for the reactor building of a nuclear power plant. Its on-site installation requires rigorous post-weld hydrogen removal and stress-relieving heat treatment for both circumferential and longitudinal welds. As an important component of the passive safety system, the containment vessel (CV) effectively prevents internal pressure from exceeding design values ​​and prevents the leakage of radioactive materials under accident conditions, making it one of the essential pieces of equipment for ensuring the safe operation of nuclear power plants.

[0003] Nuclear power plant construction places extremely stringent quality requirements on all welds in the CV (containerless steel) system. The density, toughness, and amount of welding deformation of the welded joints are quality indicators that must be controlled and guaranteed.

[0004] When existing equipment is in use, the heating element is locally bridging and suspended when it passes through weld beads or locations of abrupt changes in weld height, creating a tiny air gap between it and the workpiece surface. This gap is highly susceptible to air ionization and breakdown, triggering an electric arc discharge. The high temperature of the arc can instantly melt the containment vessel, causing irreversible damage. Furthermore, conventional simple spring or airbag clamping devices can only provide a unidirectional constant force perpendicular to the workpiece surface. When applied to welds on large curved shells, the heating element tilts laterally during movement due to the height difference on both sides of the weld, resulting in a severe asymmetry in heat input. This not only affects the elimination of residual stress but also easily causes overheating and oxidation on one side of the weld while the other side exceeds the hardness limit. Therefore, a heat treatment device for welds installed on steel containment vessels was developed. Summary of the Invention

[0005] The purpose of this invention is to provide a heat treatment device for weld seams of steel containment structures to overcome the aforementioned shortcomings in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a heat treatment device for weld seams of a steel containment vessel, comprising a base and a telescopic member fixedly disposed at its end, wherein a support plate is fixedly disposed at the end of the telescopic member;

[0007] The pressure compensation assembly, which is mounted on the upper end of the tray, includes a heating plate and a locking shaft and locking block for applying pressure toward the weld surface;

[0008] The outer surface of the locking shaft is rotatably connected to the inner wall of the locking block, which is used for the heating plate to move radially. During the movement of the heating plate along the weld, the position of the heating plate is dynamically compensated and corrected according to the real-time contour change of the weld surface, so as to maintain the contact state between the heating plate and the weld surface.

[0009] The protective assembly, which is mounted on one side of the upper end of the pallet, includes a drive shaft, an extension plate, and a scraper for pre-treating the uneven areas of the weld seam.

[0010] The end of the drive shaft is fixedly connected to the end of the extension plate, so that the extension plate rotates around the end of the drive shaft. At the same time, the end of the extension plate is connected to the end of the scraper, which works in conjunction with the scraper to clean the uneven area of ​​the weld seam, so as to smooth the contact surface that the heating plate is about to pass over.

[0011] As a further optimization of the present invention, the pressing compensation component further includes a base plate that is engaged with the tray. Both ends of the base plate are slidably provided with movable cylinders. The outer surface of the movable cylinder is provided with a movable groove, and the inner wall of the movable groove is slidably connected to the inner wall of the locking block.

[0012] As a further optimization of the present invention, a fixing rod is fixedly provided on the inner wall of the movable cylinder, a ball is fixedly provided at the end of the fixing rod, and a positioning plate is rotatably provided on the outer surface of the ball, and a ring is fixedly provided at the end of the positioning plate.

[0013] As a further optimization of the present invention, a movable plate is slidably provided on the inner wall of the ring, and multiple sets of movable rods are uniformly rotatably provided on the outer surface of the movable plate.

[0014] As a further optimization of the present invention, a support plate is fixedly provided at the end of the ring, and a support groove corresponding to the moving rod is opened at the end of the support plate. The inner wall of the support groove is slidably connected to the outer surface of the moving rod, and a snap-fit ​​block is rotatably provided at the end of the moving rod. One side of the snap-fit ​​block is rotatably connected to the outer surface of the support plate.

[0015] As a further optimization of the present invention, a protrusion is provided at the connection between the snap-fit ​​block and the moving rod, and the outer surface of the end of the heating plate snaps into the outer surface of the protrusion.

[0016] As a further optimization of the present invention, the protective component further includes an adjusting plate that engages with the tray. An adjusting block is symmetrically fixedly disposed at the end of the adjusting plate, and an adjusting rod is fixedly disposed on the outer surface of the adjusting block. Meanwhile, the inner wall of the end of the adjusting block is rotatably connected to the outer surface of the drive shaft.

[0017] As a further optimization of the present invention, a movable plate is slidably provided on the outer surface of the adjusting rod, a limiting block is fixedly provided on the outer surface of the movable plate, and a swing plate is slidably provided on the inner wall of the limiting block.

[0018] As a further optimization of the present invention, a swing block is slidably fitted onto the inner wall of the swing plate, and a drive rod is slidably fitted onto the inner wall of the swing block.

[0019] As a further optimization of the present invention, driving blocks are fixedly provided at both ends of the driving rod, and the ends of the driving blocks are fixedly connected to the outer surface of the driving shaft.

[0020] Compared with the prior art, the heat treatment device for steel containment vessel installation welds provided by the present invention has the following advantages:

[0021] Precise pressing and bonding are achieved through the pressure compensation component, ensuring that the heating element only acts on the weld and heat-affected zone, avoiding unnecessary heating of non-welded areas. Simultaneously, the bonding state between the heating element and the weld can be adjusted in real time, effectively preventing localized overheating and burn-through caused by poor connections. Furthermore, precise temperature control that heats only the necessary weld area improves energy efficiency and reduces energy waste.

[0022] Pre-treating the weld surface with protective components can effectively remove impurities such as weld beads, spatter, and oxide scale, preventing impurities from affecting heat transfer efficiency or causing uneven local temperatures during heating. At the same time, pre-scraping the uneven weld surface can further improve the tightness of the fit between the heating plate and the weld surface, laying a good foundation for the uniformity and stability of subsequent heat treatment, thereby ensuring the quality of weld heat treatment and reducing the risk of various defects caused by surface unevenness.

[0023] Through the synergistic action of the pressure compensation component and the protective component, the entire process of steel containment vessel weld seams, from surface pretreatment to dynamic heating and bonding, can be optimized. The protective component first cleans and flattens the weld seam surface, creating ideal contact conditions for the precise operation of the pressure compensation component. The pressure compensation component, based on the pretreatment, ensures that the heating plate is always in optimal contact with the weld seam surface through a dynamic compensation and correction mechanism. This not only significantly improves the safety of the heat treatment process and effectively eliminates the risks of arc discharge and melting of the containment vessel, but also greatly improves the uniformity of heat input, avoiding the problem of asymmetrical heat input on both sides of the weld seam caused by lateral tilting. This more effectively eliminates residual welding stress, ensures the density and toughness of the welded joint, and strictly controls the amount of welding deformation. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0025] Figure 1 This is a first schematic diagram of the overall structure provided in an embodiment of the present invention;

[0026] Figure 2 This is a second schematic diagram of the overall structure provided in an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the pressure compensation component structure provided in an embodiment of the present invention;

[0028] Figure 4 This is a first exploded view of the pressure compensation component structure provided in an embodiment of the present invention;

[0029] Figure 5 This is a second exploded view of the pressure compensation component structure provided in an embodiment of the present invention;

[0030] Figure 6 A schematic diagram of the moving plate and support plate structure provided in an embodiment of the present invention.

[0031] Figure 7 This is a schematic diagram of the protective component structure provided in an embodiment of the present invention;

[0032] Figure 8 This is a first exploded view of the protective component structure provided in an embodiment of the present invention;

[0033] Figure 9 This is a second exploded view of the protective component structure provided in an embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Base; 2. Pressing compensation component; 3. Protective component; 11. Telescopic component; 12. Support plate; 21. Base plate; 22. Locking shaft; 221. Locking block; 23. Movable cylinder; 231. Movable groove; 24. Fixed rod; 241. Ball; 242. Positioning plate; 25. Ring; 26. Moving plate; 261. Moving rod; 27. Support plate; 271. Support groove; 28. Snap-fit ​​block; 29. ​​Heating plate; 31. Adjusting plate; 32. Adjusting block; 321. Adjusting rod; 33. Drive shaft; 331. Drive block; 332. Drive rod; 34. Movable plate; 35. Extension plate; 351. Scraper; 36. Limiting block; 37. Swing plate; 38. Swing block. Detailed Implementation

[0036] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0037] Example: Please refer to Figure 1 - Figure 9 The steel containment vessel is equipped with a weld heat treatment device, including a base 1 and a telescopic member 11 fixedly installed at its end, with a support plate 12 fixedly installed at the end of the telescopic member 11.

[0038] In this scheme, the telescopic component 11 is a component with telescopic function such as an electric telescopic rod, and is connected to an external control device. The telescopic component 11 drives the pallet 12 to move up and down, so as to adjust the initial distance between the pressing compensation component 2 and the protective component 3 mounted on the pallet 12 and the weld surface, so as to ensure that the device can work effectively on steel safety shells of different thicknesses or installation positions.

[0039] Furthermore, the pressing compensation component 2, which is assembled on the upper end of the support plate 12, includes a heating plate 29, and a locking shaft 22 and a locking block 221 for applying pressing pressure toward the weld surface; the outer surface of the locking shaft 22 is rotatably connected to the inner wall of the locking block 221 for the heating plate 29 to move radially. During the movement of the heating plate 29 along the weld, the position of the heating plate 29 is dynamically compensated and corrected according to the real-time contour change of the weld surface to maintain the contact state between the heating plate 29 and the weld surface.

[0040] In this embodiment, a torsion spring is sleeved on the outer surface of the locking shaft 22. One end of the spring is connected to the locking block 221, and the other end is connected to the outer surface of the locking shaft 22. The two ends of the locking block 221 are semi-circular rings, and the locking block 221 is composed of telescopic rods on both sides of the locking shaft 22, so as to ensure that the locking block 221 remains stable when it rotates around the locking shaft 22.

[0041] When the locking block 221 rotates under force, the torsion spring generates elastic potential energy to provide a restoring force for the locking block 221. When the heating plate 29 encounters a protrusion or depression on the weld surface during movement, the locking block 221 will be subjected to a reaction force from the inner wall of the movable groove 231, thereby rotating around the locking shaft 22.

[0042] At this time, the torsion spring is twisted, and the elastic restoring force it generates will act on the movable cylinder 23 through the locking block 221, causing the movable cylinder 23 to slide adaptively on the base plate 21, thereby driving the entire heating plate 29 to make a fine adjustment in radial position.

[0043] The dynamic compensation mechanism can respond to the contour changes of the weld surface in real time, ensuring that the heating plate 29 is always in close contact with the weld surface with appropriate pressure, effectively avoiding the problem of arc discharge caused by gaps and preventing the occurrence of arc discharge phenomenon.

[0044] The heating plate 29 is composed of multiple sets of heating elements. The heating elements are made of nickel-chromium alloy, which has the characteristics of uniform heating, high temperature resistance and oxidation resistance. Its surface is covered with a layer of insulating and heat-conducting ceramic sheet, which can not only ensure that the heat is efficiently transferred to the weld, but also prevent the heating elements from directly contacting the steel safety shell and causing a short circuit.

[0045] Furthermore, the pressing compensation component 2 also includes a base plate 21 that is snapped into the support plate 12. Both ends of the base plate 21 are slidably provided with movable cylinders 23. The outer surface of the movable cylinder 23 is provided with a movable groove 231, and the inner wall of the movable groove 231 is slidably connected to the inner wall of the locking block 221.

[0046] Specifically, the end of the base plate 21 is provided with bolts or other fixing components to lock the base plate 21 onto the support plate 12 to prevent loosening or displacement during the operation of the device.

[0047] The inner wall of the movable cylinder 23 and the outer surface of the base plate 21 are slidably connected by the cooperation of the slide rail and the slider. The slide rail is set along the length of the base plate 21 to ensure that the movable cylinder 23 can move in a straight line stably. The cross-section of the movable groove 231 is arc-shaped, and its curvature matches the rotation trajectory of the locking block 221. When the locking block 221 rotates around the locking shaft 22, its end can slide smoothly in the movable groove 231, thereby converting the rotational motion of the locking block 221 into the linear sliding motion of the movable cylinder 23, realizing the dynamic adjustment of the position of the heating plate 29.

[0048] Both ends of the movable cylinder 23 are also equipped with buffer pads made of rubber. When the movable cylinder 23 slides to the limit position on the base plate 21, the buffer pads can absorb the impact force, prevent the movable cylinder 23 from directly colliding with the end of the base plate 21 and causing damage, and extend the service life of the device.

[0049] Furthermore, a fixing rod 24 is fixedly installed on the inner wall of the movable cylinder 23, and a ball 241 is fixedly installed at the end of the fixing rod 24. Meanwhile, a positioning plate 242 is rotatably installed on the outer surface of the ball 241, and a ring 25 is fixedly installed at the end of the positioning plate 242.

[0050] Specifically, the inner wall of the positioning plate 242 is provided with a spherical groove that matches the ball 241. The groove is coated with high-temperature resistant grease, which allows the positioning plate 242 to rotate flexibly around the ball 241 at multiple angles. This allows the ring 25 to adjust its posture in three-dimensional space. When the heating plate 29 encounters an inclination or unevenness on the weld surface, the ring 25 can be rotated by the positioning plate 242 around the ball 241, causing the subsequent connected components to be adaptively deflected, further ensuring good contact between the heating plate 29 and the weld surface.

[0051] Furthermore, a movable plate 26 is slidably disposed on the inner wall of the ring 25, and multiple sets of movable rods 261 are uniformly rotatably disposed on the outer surface of the movable plate 26. A support plate 27 is fixedly disposed at the end of the ring 25, and a support groove 271 corresponding to the movable rod 261 is opened at the end of the support plate 27. The inner wall of the support groove 271 is slidably connected to the outer surface of the movable rod 261, and a locking block 28 is rotatably disposed at the end of the movable rod 261. One side of the locking block 28 is rotatably connected to the outer surface of the support plate 27.

[0052] Specifically, the outer surface of the movable plate 26 and the inner wall of the ring 25 are slidably connected by the cooperation of the guide key and the keyway. The guide key is set along the radial direction of the ring 25 to ensure that the movable plate 26 can move stably along the radial direction of the ring 25.

[0053] The movable rods 261 are arranged in a circular array on the outer surface of the movable plate 26. One end of the rods is rotatably connected to the movable plate 26 via a hinge, and the other end extends into the support groove 271. This allows the movable rods 261 to slide in the support groove 271 and drive the locking block 28 to rotate as the movable plate 26 moves.

[0054] The middle part of the snap-fit ​​block 28 is rotatably connected to the outer surface of the support plate 27 via a pin, forming a lever structure. When the end of the moving rod 261 slides in the support groove 271, it will push the snap-fit ​​block 28 to rotate around the pin, thereby adjusting the contact state between the other side of the snap-fit ​​block 28 and the heating plate 29.

[0055] When the moving plate 26 moves toward the center of the ring 25, the moving rod 261 slides in the support groove 271, causing one end of the locking block 28 to swing outward and the other end to tighten inward, thereby clamping the heating plate 29 more tightly; conversely, when the moving plate 26 moves toward the outside of the ring 25, the locking block 28 loosens its clamping of the heating plate 29, making it easier to replace or maintain the heating plate 29.

[0056] Furthermore, a protrusion is provided at the connection between the snap-fit ​​block 28 and the moving rod 261, and the outer surface of the end of the heating plate 29 snaps into the outer surface of the protrusion.

[0057] Specifically, the protrusion is made of high-temperature resistant rubber, and its surface has an arc-shaped groove that matches the outer surface of the end of the heating plate 29. When the locking block 28 is tightened, the arc-shaped groove can fit tightly with the end of the heating plate 29, which not only achieves a firm fixation of the heating plate 29, but also buffers the heating plate 29 when it expands and contracts due to temperature changes through the elastic deformation of the rubber protrusion, thus avoiding damage to the heating plate 29 caused by rigid contact.

[0058] Furthermore, the protective component 3, which is mounted on one side of the upper end of the support plate 12, includes a drive shaft 33, an extension plate 35, and a scraper 351 for pre-treating the uneven area of ​​the weld seam; the end of the drive shaft 33 is fixedly connected to the end of the extension plate 35, so that the extension plate 35 rotates around the end of the drive shaft 33, while the end of the extension plate 35 is connected to the end of the scraper 351, thereby cooperating with the scraper 351 to clean the uneven area of ​​the weld seam, so as to smooth the contact surface that the heating plate 29 is about to pass over.

[0059] In this embodiment, when the drive shaft 33 rotates, it synchronously drives the extension plates 35 fixed at both ends of it to rotate, thereby driving the scraper 351 to reciprocate, thereby scraping and smoothing the weld slag, spatter and uneven areas on the weld surface.

[0060] The scraper 351 is made of high-hardness alloy material and is arc-shaped to match the direction of the weld. When it comes into contact with the weld surface, it can apply uniform pressure through the rotation of the extension plate 35 to flatten the protruding weld beads and scrape out the impurities in the depressions, forming a relatively smooth pre-treated surface.

[0061] The extension plate 35 is made of elastic steel plate and has a certain bending deformation capability. When the scraper 351 encounters a stubborn protrusion or hard point, the extension plate 35 can produce adaptive bending to avoid damage to the scraper 351 due to rigid collision, while ensuring that the scraper 351 always keeps in contact with the weld surface.

[0062] Furthermore, the protective assembly 3 also includes an adjusting plate 31 that is snapped into the support plate 12. An adjusting block 32 is symmetrically fixedly provided at the end of the adjusting plate 31. An adjusting rod 321 is fixedly provided on the outer surface of the adjusting block 32. At the same time, the inner wall of the end of the adjusting block 32 is rotatably connected to the outer surface of the drive shaft 33.

[0063] Specifically, the drive shaft 33 is limited by the adjusting block 32 on the adjusting plate 31. The inner wall of the adjusting block 32 is provided with a bearing, and the end of the drive shaft 33 is rotatably connected to the adjusting block 32 through the bearing to reduce the frictional resistance when the drive shaft 33 rotates and ensure its smooth rotation. The setting direction of the adjusting rod 321 is perpendicular to the axis of the drive shaft 33, providing guide support for the subsequent installation and movement of the movable plate 34.

[0064] Furthermore, a movable plate 34 is slidably provided on the outer surface of the adjusting rod 321, a limiting block 36 is fixedly provided on the outer surface of the movable plate 34, and a swing plate 37 is slidably provided on the inner wall of the limiting block 36.

[0065] Specifically, the inner wall of the limiting block 36 is provided with components such as an electric telescopic rod, which have telescopic functions and are connected to an external control device. The electric telescopic rod drives the swing plate 37 to move on the inner wall of the limiting block 36. The movable plate 34 and the adjusting rod 321 achieve sliding cooperation through the structure of a slider and a sliding groove. The sliding groove is opened along the length direction of the adjusting rod 321, and the slider is fixed on the inner wall of the movable plate 34 to ensure that the movable plate 34 can slide stably in a straight line along the adjusting rod 321, thereby driving the limiting block 36 and the swing plate 37 connected to it to move as a whole to adapt to the pretreatment requirements of welds of different widths.

[0066] Furthermore, a swing block 38 is slidably fitted into the inner wall of the swing plate 37, and a drive rod 332 is slidably fitted into the inner wall of the swing block 38. Drive blocks 331 are fixedly installed at both ends of the drive rod 332, and the ends of the drive blocks 331 are fixedly connected to the outer surface of the drive shaft 33.

[0067] Specifically, when the swing plate 37 moves, it drives the swing block 38 to move synchronously. The sliding fit between the inner wall of the swing block 38 and the drive rod 332 allows the drive rod 332 to slide axially within the swing block 38. This causes the drive rod 332 to work with the drive block 331 to drive the drive shaft 33 to rotate around the inner wall of the adjusting block 32, and drive the scraper 351 to move back and forth, thus achieving the reciprocating scraping pretreatment of the weld surface.

[0068] The control device can choose a microcontroller as the control terminal. In this embodiment, the microcontroller is a typical embedded microcontroller unit, consisting of an arithmetic logic unit (ALU), a controller, memory, input / output devices, etc., essentially a miniature computer. Compared to general-purpose microprocessors used in personal computers, it emphasizes self-sufficiency (no external hardware required) and cost savings. Its biggest advantage is its small size, allowing it to be placed inside the instrument, but it has limited storage capacity, simple input / output interfaces, and low power consumption.

[0069] Working principle: When in use, the telescopic component 11 is first activated by the external control device. The telescopic component 11 extends or retracts, which drives the pallet 12 and the pressing compensation component 2 and the protective component 3 mounted on the pallet 12 to move up and down as a whole, and adjusts to the initial working height that is adapted to the weld surface of the steel safety shell.

[0070] Subsequently, the protective component 3 controls the electric telescopic rod within the limiting block 36, driving the swing plate 37 to move within the inner wall of the limiting block 36. The swing plate 37 then drives the swing block 38 to move synchronously. The swing block 38 slides in conjunction with the drive rod 332, allowing the drive rod 332 to slide axially within the swing block 38, thereby driving the drive shaft 33 to rotate around the bearing on the inner wall of the adjusting block 32 via the drive block 331.

[0071] When the drive shaft 33 rotates, the extension plates 35 fixed at both ends of it rotate accordingly. The extension plates 35 drive the scraper 351 to reciprocate and smooth the weld surface, removing weld slag, spatter, and uneven areas, preparing for the subsequent bonding of the heating plate 29. During this process, the movable plate 34 can slide along the adjusting rod 321, driving the limiting block 36 and the swing plate 37 to move as a whole to accommodate welds of different widths.

[0072] After pretreatment, the pressure compensation component 2 begins to heat treat the weld. The heating plate 29 is powered by an external power source, and the nickel-chromium alloy heating element generates heat, which is transferred to the weld through the insulating thermally conductive ceramic sheet. When the heating plate 29 moves along the weld, if it encounters a protrusion or depression on the weld surface, the movable cylinder 23 will be subjected to a corresponding reaction force.

[0073] The locking block 221 rotates around the locking shaft 22, twisting the torsion spring sleeved on the locking shaft 22. The elastic restoring force generated by the torsion spring acts on the movable cylinder 23 through the locking block 221, causing the movable cylinder 23 to slide along the slide rail on the base plate 21. The movement of the movable cylinder 23 drives the fixed rod 24, the ball 241 and the positioning plate 242 to move. The positioning plate 242 can rotate around the ball 241 at multiple angles, allowing the ring 25 to adjust its posture. This, in turn, drives the moving plate 26, the moving rod 261, the support plate 27 and the snap-fit ​​block 28, etc., to achieve radial position fine adjustment and angle self-adaptation of the heating plate 29, ensuring that the heating plate 29 always fits tightly against the weld surface with appropriate pressure.

[0074] Furthermore, the heating plate 29 is composed of multiple sets of heating elements, and the arc-shaped grooves of the rubber protrusions on the locking block 28 can buffer the stress generated by thermal expansion and contraction, ensuring uniform heating and preventing damage to the heating plate 29. The buffer pads at both ends of the movable cylinder 23 can absorb impact when the movable cylinder 23 slides to its limit position, thus protecting the device components. Through the above workflow, this device can perform efficient and precise heat treatment on the installation welds of the steel containment vessel.

[0075] It should be further explained that, for large nuclear-grade vessels such as steel containment vessels, this device addresses two engineering problems most prone to stress concentration during segmented heat treatment: localized overheating caused by loose connections of heating elements, and asymmetrical heat input caused by lateral tilting of heating elements. It proposes mechanical compensation and surface pretreatment solutions. Through real-time dynamic tracking of the weld contour by the pressing compensation component and pre-scraping treatment of uneven areas such as weld beads and spatter by the protective component, the temperature gradient of each segment of locally heated area is controlled within the allowable range of the process, strictly limiting the heat-affected zone to the weld and its adjacent area, thus avoiding additional thermal stress concentration.

[0076] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A heat treatment device for weld seams of a steel containment vessel, characterized in that, It includes a base (1) and a telescopic member (11) fixedly disposed at its end, wherein a support plate (12) is fixedly disposed at the end of the telescopic member (11). The pressing compensation assembly (2), which is mounted on the upper end of the tray (12), includes a heating plate (29), and a locking shaft (22) and a locking block (221) for applying pressing pressure toward the weld surface. The outer surface of the locking shaft (22) is rotatably connected to the inner wall of the locking block (221) for the heating plate (29) to move radially. During the movement of the heating plate (29) along the weld, the position of the heating plate (29) is dynamically compensated and corrected according to the real-time contour change of the weld surface to maintain the contact state between the heating plate (29) and the weld surface. The protective assembly (3), which is mounted on one side of the upper end of the pallet (12), includes a drive shaft (33), an extension plate (35), and a scraper (351) for pre-treating the uneven area of ​​the weld seam. The end of the drive shaft (33) is fixedly connected to the end of the extension plate (35), so that the extension plate (35) rotates around the end of the drive shaft (33). At the same time, the end of the extension plate (35) is connected to the end of the scraper (351), and then works with the scraper (351) to clean the uneven area of ​​the weld seam, so as to smooth the contact surface that the heating plate (29) is about to pass over.

2. The heat treatment device for steel containment vessel welds according to claim 1, characterized in that, The pressing compensation component (2) also includes a base plate (21) that is engaged with the tray (12). Both ends of the base plate (21) are slidably provided with movable cylinders (23). The outer surface of the movable cylinder (23) is provided with a movable groove (231). The inner wall of the movable groove (231) is slidably connected to the inner wall of the locking block (221).

3. The heat treatment device for weld seams of steel containment structures according to claim 2, characterized in that, A fixing rod (24) is fixedly installed on the inner wall of the movable cylinder (23). A ball (241) is fixedly installed at the end of the fixing rod (24). Meanwhile, a positioning plate (242) is rotatably installed on the outer surface of the ball (241). A ring (25) is fixedly installed at the end of the positioning plate (242).

4. The heat treatment device for weld seams of steel containment structures according to claim 3, characterized in that, The inner wall of the ring (25) is slidably provided with a movable plate (26), and the outer surface of the movable plate (26) is uniformly provided with multiple sets of movable rods (261).

5. The heat treatment device for steel containment vessel welds according to claim 4, characterized in that, A support plate (27) is fixedly provided at the end of the ring (25). The end of the support plate (27) is provided with a support groove (271) corresponding to the moving rod (261). The inner wall of the support groove (271) is slidably connected to the outer surface of the moving rod (261). A snap-fit ​​block (28) is rotatably provided at the end of the moving rod (261). One side of the snap-fit ​​block (28) is rotatably connected to the outer surface of the support plate (27).

6. The heat treatment device for steel containment vessel installation welds according to claim 5, characterized in that, A protrusion is provided at the connection between the snap-fit ​​block (28) and the moving rod (261), and the outer surface of the end of the heating plate (29) snaps into the outer surface of the protrusion.

7. The heat treatment device for weld seams of steel containment structures according to claim 1, characterized in that, The protective component (3) also includes an adjustment plate (31) that is engaged with the tray (12). An adjustment block (32) is symmetrically fixed at the end of the adjustment plate (31). An adjustment rod (321) is fixedly fixed on the outer surface of the adjustment block (32). Meanwhile, the inner wall of the end of the adjustment block (32) is rotatably connected to the outer surface of the drive shaft (33).

8. The heat treatment device for steel containment vessel welds according to claim 7, characterized in that, The outer surface of the adjusting rod (321) is slidably provided with a movable plate (34), the outer surface of the movable plate (34) is fixedly provided with a limiting block (36), and the inner wall of the limiting block (36) is slidably provided with a swing plate (37).

9. The heat treatment device for steel containment vessel welds according to claim 8, characterized in that, The inner wall of the swing plate (37) is fitted with a swing block (38), and the inner wall of the swing block (38) is fitted with a drive rod (332).

10. The heat treatment device for steel containment vessel welds according to claim 9, characterized in that, Both ends of the drive rod (332) are fixedly provided with drive blocks (331), and the ends of the drive blocks (331) are fixedly connected to the outer surface of the drive shaft (33).

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