A welding device for reducing welding stress deformation of a large-diameter tower drum

Abstract

The utility model relates to the field of wind power tower, concretely relates to a welding device that reduces the welding stress deformation of large diameter tower cylinder, include: ground rail, self aligning roller stand, welding cross operation machine and two section cylinder, the self aligning roller stand moves on the ground rail, and the side of one cylinder is erected with sectional type heat preservation mechanism, and the one end of another cylinder is erected with vibration type stress relief mechanism, sectional type heat preservation mechanism includes L shaped support and arc support frame, and the outer wall of arc support frame is equipped with a plurality of connecting ribs at intervals. Through sectional type heat preservation mechanism, utilize three cross sections arc heat preservation shell of trapezoidal, cooperate the electric heating wire of different temperature, carry out accurate gradient heat preservation to the different area of cylinder, simultaneously when the arc heat preservation shell is driven by telescopic link movement, the organ heat preservation cover follows telescopic and fills the gap, guarantees the heat preservation area sealed continuous, reduces the temperature gradient, avoids the heat stress that partial temperature is too high or too low produces, effectively reduces the welding stress deformation.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine towers, and in particular to a welding device for reducing welding stress and deformation of large-diameter towers. Background Technology

[0002] The tower is the core support structure of a wind turbine generator set. Its main function is to support the wind turbine and nacelle at a height that meets the power generation requirements, while also bearing the multiple loads during the operation of the unit, ensuring the stable and safe operation of the entire wind power generation system. The tower body needs to be welded during the assembly process.

[0003] During welding, the temperature of the weld and the surrounding 20-50mm heat-affected zone rises sharply, increasing the interatomic spacing and causing a significant thermal expansion trend. However, because the temperature of the tower base material outside the heat-affected zone is lower (at room temperature or low temperature), its stiffness is much greater than that of the high-temperature softened weld zone, restricting the free expansion of the weld zone. At this time, the weld zone is squeezed by the surrounding cold base material, generating instantaneous compressive stress. However, due to the good plasticity of metal at high temperatures, plastic compression deformation will occur first. After welding, the weld zone begins to cool, and the interatomic spacing of the metal decreases, resulting in a contraction trend. However, at this time, the weld zone has recovered its rigidity from the high-temperature softened state and cannot be freely compressed as during heating. The outer cold base material will hinder the contraction of the weld zone, causing the weld zone to be pulled by the surrounding base material, generating residual tensile stress. To balance this tensile stress, the tower structure will deform in the direction of least resistance, thus undergoing stress deformation.

[0004] Given that stress deformation during tower welding has a significant impact on tower quality and performance, a welding device for reducing stress deformation during the welding of large-diameter towers is proposed to effectively reduce stress deformation and ensure tower manufacturing precision and structural reliability. Utility Model Content

[0005] The main technical problem solved by this utility model is to provide a welding device for reducing the stress and deformation during the welding of large-diameter towers, which facilitates the reduction of stress and deformation generated during tower welding.

[0006] To solve the above-mentioned technical problems, the present invention adopts a technical solution as follows: a welding device for reducing welding stress and deformation of large-diameter towers is provided, comprising: a ground rail, a self-aligning roller frame, a welding cross manipulator and two sections of the tower body. The self-aligning roller frame moves on the ground rail. A segmented heat preservation mechanism is mounted on one side of one of the sections of the tower body, and a vibration stress relief mechanism is mounted on one end of the other section of the tower body.

[0007] The segmented insulation mechanism includes an L-shaped bracket and an arc-shaped support frame. The outer wall of the arc-shaped support frame is provided with a number of connecting ribs at intervals. One end of each connecting rib is connected to the L-shaped bracket. The inner side of the arc-shaped support frame is provided with an adjustable segmented insulation component.

[0008] The adjustable segmented insulation component includes three arc-shaped insulation shells spaced apart. The two ends of the middle arc-shaped insulation shell are respectively connected to bellows insulation covers. The opposite end of the bellows insulation cover is respectively connected to one end of the other two arc-shaped insulation shells. It also includes telescopic rods spaced apart and driving the corresponding arc-shaped insulation shells to move back and forth synchronously.

[0009] A medium-temperature electric heating wire is installed on the inner side of the arc-shaped heat-insulating shell in the middle, a high-temperature electric heating wire is installed on the inner side of the arc-shaped heat-insulating shell near the welding head of the welding cross manipulator, and a low-temperature electric heating wire is installed on the inner side of the arc-shaped heat-insulating shell near the L-shaped bracket.

[0010] By adopting the above technical solution, the arc-shaped support frame fits tightly against the surface of the cylinder. Simultaneously, three arc-shaped insulation shells are spaced apart to provide targeted insulation for different areas of the cylinder. Each insulation shell is independently controlled and adjusted according to the temperature requirements and heat-affected zone at different locations during welding, reducing temperature gradients and avoiding thermal stress caused by excessively high or low local temperatures. This effectively reduces welding stress deformation and improves welding quality. Furthermore, when the telescopic rods drive the arc-shaped insulation shells to move, the bellows insulation cover can extend and retract accordingly, filling the gaps between the insulation shells, ensuring the sealing and continuity of the entire insulation area, preventing heat loss, further reducing the impact of temperature changes on welding stress, and improving the stability of the welded structure. The electric heating wires at different locations serve different areas of the cylinder. Providing a moderate temperature, the high-temperature section prevents the martensitic transformation caused by rapid cooling of the weld, while the medium-low temperature section achieves a stable temperature transition, reducing the peak value of residual tensile stress. Ultimately, this reduces deformations such as excessive ellipticity and local depressions in the cylinder caused by uneven cooling. The cooling rate of the weld and heat-affected zone is controlled by gradient heating. After the weld is naturally cooled to below 50°C, the self-aligning roller frame adjusts the weld position to the corresponding position of the vibration stress relief mechanism. Subsequently, vibration at a specific frequency and amplitude is applied to the cylinder, causing the grains inside the metal to rearrange and move at the microscopic level, releasing and relaxing residual stress. Through vibration, the stress balance state caused by welding inside the metal can be broken, allowing the stress to be redistributed in a more uniform manner, thereby effectively reducing welding residual stress.

[0011] In a preferred embodiment, the present invention can be further configured as follows: the telescopic rod includes an electric push rod mounted on the surface of the arc-shaped support frame, one end of the electric push rod is connected to the surface of the arc-shaped insulation shell, a connecting plate is installed on one side of the arc-shaped insulation shell, a guide rod is provided on the connecting plate, a connecting plate is installed on one side of the arc-shaped support frame, a guide sleeve is installed on the connecting plate, and one end of the guide rod slides through the guide sleeve.

[0012] By adopting the above technical solution, during the welding process, according to the pre-set program or the welding requirements monitored in real time, the electric push rod can receive the instructions of the control system and directly drive the arc-shaped insulation shell to move back and forth through its own telescopic movement. This allows for precise adjustment of the position of the arc-shaped insulation shell according to different welding stages and cylinder specifications, enabling the arc-shaped insulation shell to adapt to different welding conditions and cylinder dimensions. When the electric push rod pushes the arc-shaped insulation shell to move, the guide rod can slide linearly within the guide sleeve, thereby precisely controlling the movement stroke of the arc-shaped insulation shell.

[0013] In a preferred embodiment, the present invention can be further configured as follows: the vibration stress relief mechanism includes a gantry frame and arc-shaped stress relief components symmetrically arranged on its inner side. The two sides of the gantry frame are respectively connected to telescopic rod devices for driving the arc-shaped stress relief components to move back and forth. The arc-shaped stress relief component includes two arc-shaped plates. Several connecting plates are installed at intervals between the opposite sides of the arc-shaped plates. Vibration cylinders are respectively installed on the connecting plates. The protruding end of the vibration cylinder extends to the inner side of the arc-shaped plate and is equipped with a U-shaped plate. Rollers are rotatably connected to the inner side of the U-shaped plate.

[0014] By adopting the above technical solution, the gantry frame spans above the large-diameter tower, capable of bearing the weight of components such as the arc-shaped stress relief assembly and the telescopic rod device, as well as various forces generated during vibration. This ensures the mechanism remains stable during operation, without tilting or swaying. The arc-shaped stress relief assembly acts on the welding area of ​​the large-diameter tower simultaneously from two directions, expanding the stress relief range and distributing the vibration force evenly across the tower. This avoids uneven stress on the tower caused by unilateral vibration and reduces additional deformation caused by vibration. The telescopic rod device drives the arc-shaped stress relief assembly to move back and forth along the tower. By adjusting the travel distance, the position of the arc-shaped stress relief assembly is adjusted, ensuring that the vibration can act on newly generated welding stress areas in a timely and effective manner. After the telescopic rod device extends, the arc-shaped plate adheres to the tower surface, the roller contacts the tower surface, and the vibration cylinder generates vibration force according to a predetermined frequency and amplitude, acting on the tower surface to eliminate welding stress. At the same time, the rotation of the roller reduces friction with the tower surface, preventing damage to the tower surface or affecting the vibration effect due to excessive friction.

[0015] In a preferred embodiment, the present invention can be further configured as follows: the telescopic rod device includes an electric cylinder installed on the side wall of the gantry frame, the extended end of the electric cylinder is connected to a U-shaped seat, the U-shaped seat is installed between the arc plates, and guide rods two are slidably passed through the upper and lower parts of the electric cylinder, one end of each guide rod two is connected to a mounting seat, and the mounting seats are respectively connected between the arc plates.

[0016] By adopting the above technical solution, the electric cylinder adjusts the displacement of its extended end to drive the arc-shaped stress relief component to the designated position and applies vibration to the tower welding area with appropriate force to ensure uniform stress relief effect. At the same time, the guide rod 2 provides precise guidance for the movement of the arc-shaped stress relief component, ensuring that the arc plate can only move back and forth in a straight line along the direction of the guide rod 2 under the drive of the electric cylinder, avoiding the problem of poor contact between the arc plate and the tower surface or interference with other components caused by deviation in the direction of movement.

[0017] In a preferred embodiment, the present invention can be further configured such that the cross-section of the arc-shaped heat-insulating shell is trapezoidal.

[0018] By adopting the above technical solution, the diameter tower usually has a large curvature. The arc-shaped insulation shell with a trapezoidal cross-section can better fit the curved surface of the tower. Its trapezoidal structure, which is narrow at the top and wide at the bottom, allows the arc-shaped insulation shell to be distributed more tightly along the outline of the tower when wrapping the tower, reducing the gap between the insulation shell and the surface of the tower, effectively reducing the channels for heat loss, preventing outside air from entering the insulation area, and thus improving the insulation effect.

[0019] In summary, this utility model includes at least one of the following beneficial technical effects of a welding device for reducing welding stress and deformation in large-diameter towers:

[0020] 1. Through a segmented insulation mechanism, three arc-shaped insulation shells with trapezoidal cross-sections are used in conjunction with electric heating wires of different temperatures to implement precise gradient insulation for different areas of the cylinder. At the same time, when the telescopic rod drives the arc-shaped insulation shell to move, the bellows insulation cover expands and contracts to fill the gaps, ensuring continuous sealing of the insulation area, reducing temperature gradients, avoiding thermal stress caused by excessively high or low local temperatures, effectively reducing welding stress deformation, and improving welding quality.

[0021] 2. The arc-shaped stress relief component is driven by an electric cylinder to reach the designated position and, together with the vibration cylinder, applies vibration to the welding area of ​​the tower with appropriate force to improve the stress relief effect. The roller is connected to the U-shaped plate at the protruding end of the vibration cylinder, which can reduce friction with the tower surface during vibration stress relief, thus avoiding damage to the surface or affecting the vibration effect. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the segmented heat preservation machine of this utility model;

[0025] Figure 3 This is a schematic diagram of the adjustable segmented thermal insulation component of this utility model;

[0026] Figure 4 This is a partial exploded view of the vibration stress relief mechanism of this utility model;

[0027] Figure 5 A schematic diagram of the adjustable segmented thermal insulation component of this utility model;

[0028] Figure 6 A schematic diagram of the structure of the arc-shaped stress relief component of this utility model.

[0029] In the diagram: 1. Ground rail; 2. Self-aligning roller frame; 3. Welding cross manipulator; 4. Cylinder body; 50. Segmented insulation mechanism; 60. Vibration stress relief mechanism;

[0030] 51. L-shaped bracket; 52. Arc-shaped support frame; 53. Connecting rib; 54. Adjustable segmented insulation component;

[0031] 61. Gantry frame; 62. Curved stress relief assembly; 63. Telescopic pole device;

[0032] 541. Arc-shaped heat-insulating shell; 542. Bellows heat-insulating cover; 543. Telescopic rod; 544. Medium-temperature electric heating wire; 545. High-temperature electric heating wire; 546. Low-temperature electric heating wire;

[0033] 621. Arc-shaped plate; 622. Connecting plate three; 623. Vibration cylinder; 624. U-shaped plate; 625. Roller;

[0034] 631. Electric cylinder; 632. U-shaped seat; 633. Guide rod two; 634. Mounting base;

[0035] 5431. Electric push rod; 5432. Connecting plate one; 5433. Guide rod one; 5434. Connecting plate two; 5435. Guide sleeve. Detailed Implementation

[0036] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0037] It should be noted that these figures are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0038] Reference Figure 1-6 This utility model discloses a welding device for reducing welding stress and deformation of large-diameter tower sections, comprising: a ground rail 1, a self-aligning roller frame 2, a welding cross manipulator 3, and two sections of tower sections 4. The self-aligning roller frame 2 moves on the ground rail 1. A segmented insulation mechanism 50 is mounted on one side of one section of tower section 4, and a vibration stress relief mechanism 60 is mounted on one end of the other section of tower section 4. The segmented insulation mechanism 50 includes an L-shaped bracket 51 and an arc-shaped support frame 52. The outer wall of the arc-shaped support frame 52 is provided with several connecting ribs 53 spaced apart. One end of each connecting rib 53 is connected to the L-shaped bracket 51. An adjustable segmented insulation component 54 is provided on the inner side of the arc-shaped support frame 52. The adjustable segmented insulation component 54 includes spaced-apart components... The system includes three arc-shaped insulation shells 541. The two ends of the middle arc-shaped insulation shell 541 are connected to bellows insulation covers 542. The opposite ends of the bellows insulation covers 542 are connected to one end of the other two arc-shaped insulation shells 541. The system also includes telescopic rods 543 that are spaced apart and drive the corresponding arc-shaped insulation shells 541 to move back and forth synchronously. A medium-temperature electric heating wire 544 is installed on the inner side of the middle arc-shaped insulation shell 541. A high-temperature electric heating wire 545 is installed on the inner side of the arc-shaped insulation shell 541 near the welding head of the welding cross manipulator 3. A low-temperature electric heating wire 546 is installed on the inner side of the arc-shaped insulation shell 541 near the L-shaped bracket 51. The cross-section of the arc-shaped insulation shell 541 is trapezoidal.

[0039] After the four sets of welded seams of the cylinder are welded together, they rotate along the direction of the high-temperature electric heating wire 545 under the action of the self-aligning roller frame 2, thus entering the arc-shaped insulation shell 541. Together with the medium-temperature electric heating wire 544 and the low-temperature electric heating wire 546, the temperature gradient is reduced by their decreasing temperature. Furthermore, when the telescopic rod 543 drives the arc-shaped insulation shell 541 to move, the bellows insulation cover 542 can extend and retract accordingly, filling the gaps between the arc-shaped insulation shells 541, ensuring the sealing and continuity of the entire insulation area, preventing heat loss, and further reducing the impact of temperature changes on welding stress. At the same time, the trapezoidal cross-section of the arc-shaped insulation shell 541 is designed to better fit the curved surface of the tower. Its trapezoidal structure, narrower at the top and wider at the bottom, allows the arc-shaped insulation shell 541 to be more tightly distributed along the outline of the tower when wrapping it, reducing the impact of temperature changes on welding stress. The gap between the weld and the tower surface effectively reduces the channels for heat loss, while the electric heating wires at different positions provide appropriate temperatures for different areas of the cylinder 4. The high-temperature section prevents the martensitic transformation caused by rapid cooling of the weld, while the medium and low-temperature section achieves a stable temperature transition, reducing the peak value of residual tensile stress. Ultimately, this reduces deformations such as excessive ellipticity and local depressions in the cylinder 1 caused by uneven cooling. The cooling rate of the weld and heat-affected zone is controlled by gradient heating. After the weld is naturally cooled to below 50°C, the self-aligning roller frame 2 moves on the ground rail 1 and adjusts the weld position to the corresponding position of the vibration stress relief mechanism 60. Subsequently, the cylinder 4 is subjected to vibration at a specific frequency and amplitude, which causes the grains inside the metal to rearrange and move at the microscopic level, releasing and relaxing the residual stress. This effectively reduces welding residual stress and welding stress deformation, thereby improving welding quality.

[0040] The telescopic rod 543 includes an electric push rod 5431 mounted on the surface of the arc-shaped support frame 52. One end of the electric push rod 5431 is connected to the surface of the arc-shaped insulation shell 541. A connecting plate 5432 is mounted on one side of the arc-shaped insulation shell 541. A guide rod 5433 is provided on the connecting plate 5432. A connecting plate 5434 is mounted on one side of the arc-shaped support frame 52. A guide sleeve 5435 is mounted on the connecting plate 5434. One end of the guide rod 5433 slides through the guide sleeve 5435.

[0041] The electric push rod 5431 drives the arc-shaped insulation shell 541 to move back and forth, so as to precisely adjust the position of the arc-shaped insulation shell 541 according to different welding stages and cylinder 4 specifications, so that the arc-shaped insulation shell 541 can adapt to different welding conditions and cylinder 4 dimensions. When the electric push rod 5431 pushes the arc-shaped insulation shell 541 to move, the guide rod 5433 slides linearly in the guide sleeve 5435, precisely controlling the movement stroke of the arc-shaped insulation shell 541.

[0042] The vibration stress relief mechanism 60 includes a gantry frame 61 and an arc-shaped stress relief component 62 symmetrically arranged on its inner side. The two sides of the gantry frame 61 are respectively connected to telescopic rod devices 63 that drive the arc-shaped stress relief component 62 to move back and forth. The arc-shaped stress relief component 62 includes two arc-shaped plates 621. Several connecting plates 622 are installed at intervals between the opposite sides of the arc-shaped plates 621. Vibration cylinders 623 are respectively installed on the connecting plates 622. The extended end of the vibration cylinder 623 extends to the inner side of the arc-shaped plate 621 and is equipped with a U-shaped plate 624. Rollers 625 are rotatably connected to the inner side of the U-shaped plate 624.

[0043] The telescopic rod device 63 drives the arc-shaped stress relief component 62 to move back and forth along the tower. By adjusting the movement stroke, the position of the arc-shaped stress relief component 62 is adjusted to ensure that the vibration can act on the newly generated welding stress area in a timely and effective manner. After the telescopic rod device 63 extends, the arc plate 621 is attached to the tower surface, the roller 625 contacts the tower surface, and the vibration cylinder 623 generates vibration force according to the predetermined frequency and amplitude, which acts on the tower surface to eliminate welding stress. At the same time, the rotation of the roller 625 can reduce the friction between it and the tower surface, avoiding damage to the tower surface or affecting the vibration effect due to excessive friction.

[0044] The telescopic rod device 63 includes an electric cylinder 631 installed on the side wall of the gantry frame 61. The extended end of the electric cylinder 631 is connected to a U-shaped seat 632. The U-shaped seat 632 is installed between the arc plates 621. Guide rods 633 slide above and below the electric cylinder 631. One end of the guide rods 633 is connected to a mounting seat 634. The mounting seats 634 are respectively connected between the arc plates 621.

[0045] The electric cylinder 631 drives the arc-shaped stress relief component 62 to the designated position and applies vibration to the tower welding area with appropriate force to ensure uniform stress relief effect. At the same time, the guide rod 633 ensures that the arc plate 621 can only move back and forth in a straight line along its axis under the drive of the electric cylinder 631, avoiding deviation due to movement direction.

[0046] The implementation principle of this embodiment is as follows: During use, two sections of cylinder 4 are placed on the self-aligning roller frame 2 using equipment such as a crane, and preliminary assembly is performed to ensure that the butt joints of the two sections of cylinder 4 are aligned. The electric push rod 5431 drives the arc-shaped insulation shell 541 closer to the surface of the cylinder 4, and the bellows insulation cover 542 extends and retracts accordingly, filling the gaps between the arc-shaped insulation shells 541 to prevent heat loss. Then, the welding cross manipulator 3 aligns its welding head with the butt joint of the cylinder 4, and welding begins. At this time, the self-aligning roller frame 2 drives the cylinder 4 to rotate slowly, ensuring the continuity and uniformity of the welding. After welding, the weld seam of the cylinder 4 rotates along the direction of the high-temperature electric heating wire 545 under the action of the self-aligning roller frame 2 and sequentially enters the arc-shaped insulation shell 541. At this time, the temperature of the high-temperature electric heating wire 545 is relatively high. This system prevents the rapid cooling of the weld from causing martensitic transformation. The medium-temperature electric heating wire 544 and the low-temperature electric heating wire 546 ensure a smooth temperature transition in the weld and heat-affected zone, reducing the peak value of residual tensile stress and achieving a temperature gradient from the weld zone to the base metal zone. Subsequently, the self-aligning roller frame 2 lifts the welded tower and moves it on the ground rail 1, adjusting the weld position to the corresponding position of the vibration stress relief mechanism 60. The electric cylinder 631 drives the arc-shaped stress relief component 62 to move towards the tower, making the roller 625 contact the tower surface. Then, the vibration cylinder 623 generates vibration force according to a predetermined frequency and amplitude, causing the grains inside the metal to rearrange and move at the microscopic level, releasing and relaxing the residual stress, thereby effectively reducing welding residual stress, reducing welding stress deformation, and improving welding quality.

[0047] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A welding apparatus for reducing welding stress and deformation in large-diameter towers, comprising: The system comprises a ground rail (1), a self-aligning roller frame (2), a welding cross manipulator (3), and two cylindrical sections (4), wherein the self-aligning roller frame (2) moves on the ground rail (1). The system is characterized in that a segmented heat preservation mechanism (50) is mounted on one side of one of the cylindrical sections (4), and a vibration stress relief mechanism (60) is mounted on one end of the other cylindrical section (4). The segmented insulation mechanism (50) includes an L-shaped bracket (51) and an arc-shaped support frame (52). The outer wall of the arc-shaped support frame (52) is provided with a number of connecting ribs (53) spaced apart. One end of the connecting ribs (53) is connected to the L-shaped bracket (51). The inner side of the arc-shaped support frame (52) is provided with an adjustable segmented insulation component (54). The adjustable segmented insulation component (54) includes three arc-shaped insulation shells (541) spaced apart. The two ends of the middle arc-shaped insulation shell (541) are respectively connected to bellows insulation covers (542). The opposite end of the bellows insulation cover (542) is respectively connected to one end of the other two arc-shaped insulation shells (541). It also includes telescopic rods (543) spaced apart and driving the corresponding arc-shaped insulation shells (541) to move back and forth synchronously. A medium-temperature electric heating wire (544) is installed on the inner side of the arc-shaped heat-insulating shell (541) in the middle, a high-temperature electric heating wire (545) is installed on the inner side of the arc-shaped heat-insulating shell (541) near the welding head of the welding cross manipulator (3), and a low-temperature electric heating wire (546) is installed on the inner side of the arc-shaped heat-insulating shell (541) near the L-shaped bracket (51).

2. The welding device for reducing welding stress and deformation of large-diameter towers according to claim 1, characterized in that, The telescopic rod (543) includes an electric push rod (5431) installed on the surface of the arc-shaped support frame (52). One end of the electric push rod (5431) is connected to the surface of the arc-shaped insulation shell (541). A connecting plate (5432) is installed on one side of the arc-shaped insulation shell (541). A guide rod (5433) is provided on the connecting plate (5432). A connecting plate (5434) is installed on one side of the arc-shaped support frame (52). A guide sleeve (5435) is installed on the connecting plate (5434). One end of the guide rod (5433) slides through the guide sleeve (5435).

3. The welding device for reducing welding stress and deformation of large-diameter towers according to claim 1, characterized in that, The vibration stress relief mechanism (60) includes a gantry frame (61) and arc-shaped stress relief components (62) symmetrically arranged on its inner side. The two sides of the gantry frame (61) are respectively connected to telescopic rod devices (63) that drive the arc-shaped stress relief components (62) to move back and forth. The arc-shaped stress relief components (62) include two arc-shaped plates (621). Several connecting plates (622) are installed at intervals between the opposite sides of the arc-shaped plates (621). Vibration cylinders (623) are respectively installed on the connecting plates (622). The protruding end of the vibration cylinder (623) extends to the inner side of the arc-shaped plate (621) and is equipped with a U-shaped plate (624). The inner side of the U-shaped plate (624) is rotatably connected to a roller (625).

4. The welding device for reducing welding stress and deformation of large-diameter towers according to claim 3, characterized in that, The telescopic rod device (63) includes an electric cylinder (631) installed on the side wall of the gantry (61). The extended end of the electric cylinder (631) is connected to a U-shaped seat (632). The U-shaped seat (632) is installed between the arc plates (621). A second guide rod (633) is slidably passed through the electric cylinder (631) above and below. One end of the second guide rod (633) is connected to a mounting seat (634). The mounting seats (634) are respectively connected between the arc plates (621).

5. The welding device for reducing welding stress and deformation of large-diameter towers according to claim 1, characterized in that, The cross-section of the arc-shaped heat-insulating shell (541) is trapezoidal.

Images