Straight seam steel pipe angle fine adjustment mechanism and girth welding auxiliary device

Abstract

The invention relates to the technical field of welding tools, in particular to a straight seam steel pipe angle fine adjustment mechanism and a circular seam welding auxiliary device.The straight seam steel pipe angle fine adjustment mechanism comprises two composite fine adjustment assemblies and a calibration structure, and the calibration structure comprises two calibration rings, a plurality of calibration auxiliary structures and two butt joint structures; the two calibration rings are in butt joint with each other to form a complete calibration circular ring; the calibration auxiliary structure comprises a mounting plate, a first monitoring assembly and a second monitoring assembly, the first monitoring assembly and the second monitoring assembly are arranged at the two ends of the mounting plate correspondingly, and when the first monitoring assembly makes contact with the outer wall of the inclined steel pipe, the first monitoring assembly is attached to the outer wall of the steel pipe and correspondingly deforms; the second monitoring assembly and the first monitoring assembly have the same effect; the two butt joint structures are used for driving the two calibration rings to be in butt joint and separated. The calibration ring, the calibration auxiliary structure and the butt joint structure are arranged, so that automatic calibration of the axes of the straight seam steel pipes is achieved, and the coaxiality error of the axes of the two straight seam steel pipes is controlled within an extremely small range.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding tooling, in particular to a straight seam steel pipe angle fine adjustment mechanism, and further relates to a girth welding auxiliary device. BACKGROUND

[0002] As the core component in the fields of oil and gas transportation, industrial pipeline and building structure, the welding quality of straight seam steel pipe directly determines the overall sealing performance, structural strength and service life of the pipeline. In the girth welding operation of straight seam steel pipe, the co-linearity of the axes of the two steel pipes to be welded is the core prerequisite to ensure the welding quality. If there is horizontal offset, vertical inclination or end misalignment in the axes, it will directly lead to defects such as incomplete penetration, undercut, welding tumor and uneven gap between welds in the welded joint, which not only reduces the mechanical properties of the joint, but also may cause safety hazards such as medium leakage and stress concentration, and in severe cases, even requires rework, which greatly increases the production cost and construction period.

[0003] At present, the auxiliary tooling used in the girth welding process of straight seam steel pipe generally has technical shortcomings in the axis calibration link. On the one hand, the existing tooling lacks a unified and fixed axis calibration reference, and the angle fine adjustment operation only relies on the swinging action of the support structure and the preliminary positioning of the support, which cannot be adjusted with an objective and accurate reference, resulting in that the fine adjustment accuracy is greatly affected by the operation experience. On the other hand, the existing tooling mainly relies on the visual inspection of the operator to judge the fitting state of the butt joint end of the steel pipe. When the steel pipe has a slight inclination, it is difficult to accurately capture the offset details through visual inspection, and the misjudgment situation of "the butt joint end seems to fit, but the axis has deviation" may occur. Especially for large-diameter straight seam steel pipes, the circumferential size of the butt joint end is large, and only through local visual inspection and single-point adjustment, it is impossible to verify whether the axis is co-linear from the overall circumferential range, which may cause the local adaptation problem of the upper part of the butt joint fitting and the lower part having a gap due to the axis offset, ultimately leading to uneven weld quality after welding and burying the structure safety hazard. SUMMARY

[0004] In view of the above problems, a straight seam steel pipe angle fine adjustment mechanism is provided, which realizes the automatic calibration of the axis of the straight seam steel pipe by setting two calibration rings, multiple calibration auxiliary structures and two butt joint structures, so as to control the coaxiality error of the axes of the two straight seam steel pipes within a very small range and ensure the welding quality.

[0005] To address the problems of existing technologies, this invention provides a straight seam steel pipe angle fine-tuning mechanism, comprising two composite fine-tuning components capable of horizontal and vertical fine-tuning. A calibration structure for calibrating the axes of the two straight seam steel pipes is disposed between the two composite fine-tuning components. The calibration structure includes two calibration rings, multiple calibration auxiliary structures, and two docking structures. Multiple mounting seats are provided on the calibration rings, and the two calibration rings dock together to form a complete calibration ring. Multiple calibration auxiliary structures are respectively disposed on the mounting seats of the two calibration rings. Each calibration auxiliary structure includes a mounting plate, a first monitoring component, and a second monitoring component. The middle part of the mounting plate is connected to the calibration ring, and the first and second monitoring components are respectively disposed at both ends of the mounting plate. When the first monitoring component contacts the outer wall of the inclined steel pipe, it deforms accordingly against the outer wall of the steel pipe. The second monitoring component has the same function as the first monitoring component. The two docking structures are used to drive the two calibration rings to dock and separate.

[0006] Preferably, the first monitoring component includes multiple telescopic components and multiple ranging components; the multiple telescopic components are arranged at equal intervals from the ends of the mounting plate toward the center, and the telescopic components are slidably connected to the mounting plate; the multiple ranging components correspond one-to-one with the multiple telescopic components, and the ranging components are used to monitor the amount of sliding of the telescopic components relative to the mounting plate.

[0007] Preferably, the telescopic assembly includes a movable rod, a spherical protrusion, and a spring; the axis of the movable rod passes through the axis of the calibration ring, and the movable rod is slidably connected to the mounting plate; the spherical protrusion is disposed at one end of the movable rod facing the center of the calibration ring; the spring is sleeved on the movable rod, and the two ends of the spring abut against the spherical protrusion and the mounting plate, respectively.

[0008] Preferably, the calibration auxiliary structure further includes a radial adjustment structure, which includes a first linear actuator for driving the mounting plate to move radially along the calibration ring.

[0009] Preferably, the radial adjustment structure further includes a first guide assembly for fixing the movement path of the mounting plate.

[0010] Preferably, the calibration auxiliary structures have an even number and at least four, with each pair of calibration auxiliary structures forming a group, and the line connecting the two calibration auxiliary structures in a group passes through the center of the calibration ring.

[0011] Preferably, the docking structure includes a first frame, a second linear actuator, and a second guide assembly; the first frame is fixed to one side of the calibration ring; the second linear actuator is mounted on the first frame and is used to drive the calibration ring to translate; the second guide assembly is used to fix the direction of movement of the calibration ring.

[0012] Preferably, the docking structure further includes two docking components, which are respectively disposed at both ends of the calibration ring, and the docking components are used for coaxial docking of the two calibration rings.

[0013] Preferably, the calibration structure further includes two fixing structures for fixing the two abutting calibration rings.

[0014] An auxiliary device for circumferential welding includes a straight seam steel pipe angle fine-tuning mechanism.

[0015] The advantages of this invention compared to the prior art are: 1. This invention comprises two calibration rings, multiple calibration auxiliary structures, and two docking structures. The two docking structures drive the two calibration rings to abut each other, forming a complete calibration ring. The axis of the fixed ring serves as a unified reference. The mounting base on the calibration ring drives the calibration auxiliary structures to move radially, causing the first and second monitoring components to synchronously approach the two steel pipes. The first and second monitoring components can generate targeted deformations according to the tilt direction of the steel pipes, capturing axial offsets in different directions. The displacement data generated by the deformation of the first and second monitoring components directly provides the adjustment basis for the composite fine-tuning component, thereby realizing the automated calibration of the straight seam steel pipe axis and controlling the coaxiality error of the two straight seam steel pipes within a very small range, ensuring welding quality.

[0016] 2. This invention is equipped with multiple telescopic components and multiple ranging components. The multiple telescopic components can slide differently according to the contour of the steel pipe. The ranging components monitor the mutual sliding amount between the telescopic components and the mounting plate. Multiple sets of equally spaced telescopic components contact the inclined steel pipe in sequence. The resulting differential data can clearly restore the inclined contour of the outer wall of the steel pipe, thereby realizing the conversion of the inclined deformation of the steel pipe into quantifiable sliding displacement data, which greatly improves the accuracy of axis calibration.

[0017] 3. This invention incorporates a movable rod, a spherical protrusion, and a spring. When the arc-shaped structure of the spherical protrusion contacts the outer wall of the steel pipe, it can adapt to any unevenness that may exist on the surface of the steel pipe, avoiding the localized detachment problem that easily occurs in planar contact. At the same time, the elastic force of the spring continuously acts on the spherical protrusion, ensuring that the spherical protrusion is always in close contact with the outer wall of the steel pipe. Through the combination of the arc-shaped structure of the spherical protrusion and the elastic force compensation of the spring, it is ensured that the telescopic component is always in close contact with the outer wall of the steel pipe, thereby effectively solving the problem of contact failure caused by unevenness of the steel pipe surface in planar contact, and providing a stable basis for sliding amount monitoring. Attached Figure Description

[0018] Figure 1 This is a perspective view of a straight seam steel pipe angle fine-tuning mechanism and a circumferential seam welding auxiliary device according to the present invention.

[0019] Figure 2 This is a left view of a straight seam steel pipe angle fine-tuning mechanism according to the present invention.

[0020] Figure 3 yes Figure 2A three-dimensional sectional view at point AA.

[0021] Figure 4 yes Figure 3 A magnified view of a portion of point B in the middle.

[0022] Figure 5 This is a perspective view of the calibration ring, mounting plate, first monitoring component, and second monitoring component in a straight seam steel pipe angle fine-tuning mechanism of the present invention.

[0023] Figure 6 This is a perspective view of the mounting plate, telescopic component, and distance measuring component in a straight seam steel pipe angle fine-tuning mechanism according to the present invention.

[0024] Figure 7 This is a perspective view of the calibration ring, mounting plate, first monitoring component, second monitoring component, first linear actuator, and first guide component in a straight seam steel pipe angle fine adjustment mechanism of the present invention.

[0025] Figure 8 This is a perspective view of the mounting plate, the first linear actuator, and the first guide assembly in a straight seam steel pipe angle fine-tuning mechanism according to the present invention.

[0026] Figure 9 This is a perspective view of the calibration ring and calibration auxiliary structure in a straight seam steel pipe angle fine adjustment mechanism of the present invention.

[0027] Figure 10 This is a three-dimensional view of the calibration ring, calibration auxiliary structure, and docking structure in a straight seam steel pipe angle fine-tuning mechanism of the present invention.

[0028] Figure 11 This is a perspective view of the calibration ring, the first frame, the second guide assembly, and the docking assembly in a straight seam steel pipe angle fine-tuning mechanism of the present invention.

[0029] Figure 12 This is a perspective view of the calibration ring, fixing plate, and fixing structure in a straight seam steel pipe angle fine adjustment mechanism of the present invention.

[0030] The diagram is labeled as follows: 1. Composite fine-tuning component; 2. Calibration ring; 21. Mounting base; 3. Calibration auxiliary structure; 31. Mounting plate; 32. First monitoring component; 321. Telescopic component; 3211. Movable rod; 3212. Spherical protrusion; 3213. Spring; 322. Ranging component; 3221. Through-beam laser photoelectric device; 33. Second monitoring component; 34. Radial adjustment structure; 341. First linear actuator; 342. First guide component; 3421. Connecting plate; 3422. First guide rod; 4. Docking structure; 41. First frame; 42. Second linear actuator; 43. Second guide component; 431. Second guide rod; 432. Synchronization plate; 44. Docking component; 441. Fixing plate; 442. Docking pin; 5. Fixing structure; 51. Second frame; 52. Third linear actuator; 53. Claw. Detailed Implementation

[0031] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0032] Reference Figures 1 to 12 As shown: A straight seam steel pipe angle fine-tuning mechanism includes two composite fine-tuning components 1 capable of horizontal and vertical fine-tuning. A calibration structure for calibrating the axes of the two straight seam steel pipes is disposed between the two composite fine-tuning components 1. The calibration structure includes two calibration rings 2, multiple calibration auxiliary structures 3, and two docking structures 4. Multiple mounting seats 21 are provided on the calibration rings 2, and the two calibration rings 2 are docked together to form a complete calibration ring. Multiple calibration auxiliary structures 3 are respectively disposed on the mounting seats 21 of the two calibration rings 2. Each calibration auxiliary structure 3 includes a mounting plate 31, a first monitoring component 32, and a second monitoring component 33. The middle part of the mounting plate 31 is connected to the calibration ring 2. The first monitoring component 32 and the second monitoring component 33 are respectively disposed at both ends of the mounting plate 31. When the first monitoring component 32 contacts the outer wall of the inclined steel pipe, the first monitoring component 32 deforms accordingly against the outer wall of the steel pipe. The second monitoring component 33 has the same function as the first monitoring component 32. The two docking structures 4 are used to drive the two calibration rings 2 to dock and separate.

[0033] Two straight seam steel pipes to be welded are placed on the support platforms of two composite fine-tuning components 1, and their positions are adjusted so that the welding ends of the two straight seam steel pipes are in a relative state. At this time, the axis of the straight seam steel pipes may have a horizontal or vertical offset. Then the calibration structure works, and the two docking structures 4 are activated. The docking structures 4 drive the two calibration rings 2 to move closer to each other. When the end faces of the two calibration rings 2 are completely abutted, they are spliced ​​to form a complete calibration ring. At this time, the axis position of the calibration ring is fixed, which serves as the reference for subsequent calibration of the straight seam steel pipe axis. Then the mounting base 21 on the calibration ring 2 drives the calibration auxiliary structure 3 to move radially (diameterally) along the calibration ring, so that the first monitoring component 32 and the second monitoring component 33 at both ends of the mounting plate 31 move towards the corresponding outer wall of the straight seam steel pipe. If the end of a certain straight seam steel pipe has a downward tilt offset, when the first monitoring component 32 at the upper end of the steel pipe is connected to the calibration ring, the calibration auxiliary structure 3 moves towards the calibration ring. When the straight seam steel pipe is touched, the tilt of the straight seam steel pipe will cause the end of the first monitoring component 32 away from the middle of the mounting plate 31 to contact the pipe wall first. As the calibration auxiliary structure 3 continues to move towards the straight seam steel pipe, the first monitoring component 32 will gradually undergo adaptive deformation from the end away from the middle of the mounting plate 31 to the end closer to the middle, and finally completely fit against the outer wall of the steel pipe. The displacement data generated during the deformation process is used as the data for the composite fine-tuning component 1 to adjust the straight seam steel pipe. The second monitoring component 33 corresponding to the other straight seam steel pipe will simultaneously perform contact and deformation detection. If the straight seam steel pipe is tilted in other directions, the first monitoring component 32 and the second monitoring component 33 will generate deformation in the corresponding direction in a similar way. Through the closed-loop working mode of "fixed benchmark - dynamic monitoring - precise adjustment", the automatic calibration of the straight seam steel pipe axis is realized, so that the coaxiality error of the two straight seam steel pipe axes is controlled within a very small range, ensuring the welding quality.

[0034] Reference Figure 3 , Figure 4 and Figure 6 As shown: The first monitoring component 32 includes multiple telescopic components 321 and multiple ranging components 322; the multiple telescopic components 321 are arranged at equal intervals from the ends of the mounting plate 31 toward the center, and the telescopic components 321 are slidably connected to the mounting plate 31; the multiple ranging components 322 correspond one-to-one with the multiple telescopic components 321, and the ranging components 322 are used to monitor the amount of sliding of the telescopic components 321 relative to the mounting plate 31.

[0035] Specifically, the ranging component 322 includes two through-beam laser photoelectric sensors 3221, which are connected to the ranging component 322 and the mounting plate 31 respectively.

[0036] After the calibration rings 2 align to form a complete reference ring, the mounting base 21 drives the calibration auxiliary structure 3 to move radially toward the steel pipe along the reference ring. The telescopic component 321 of the first monitoring component 32 first contacts the outer wall of the steel pipe. If the steel pipe is tilted downwards, the telescopic component 321 of the first monitoring component 32 located at the upper end of the steel pipe, near the end of the mounting plate 31, will first contact the outer wall of the steel pipe. As the calibration auxiliary structure 3 continues to advance, the telescopic component 321 is subjected to the squeezing force of the outer wall of the steel pipe and slides relative to the mounting plate 31 radially along the reference ring. The telescopic component 321 near the middle of the mounting plate 31 does not contact the pipe wall due to the tilt of the steel pipe and remains in its initial position. In the extended state, when the telescopic component 321 and the mounting plate 31 slide relative to each other along the radial direction of the reference ring, the distance between the two opposing laser photoelectric sensors 3221 shortens. As the calibration auxiliary structure 3 continues to move towards the steel pipe, the sliding amount of the telescopic component 321 near the end gradually increases. Subsequently, adjacent telescopic components 321 contact the inclined outer wall of the steel pipe in sequence, forming a set of differentiated displacement data, which clearly reflects the inclined profile of the outer wall of the steel pipe. Through the cooperation of multiple sets of equally spaced telescopic components 321 and opposing laser photoelectric sensors 3221, the inclined deformation of the steel pipe is converted into quantifiable sliding displacement data, which greatly improves the accuracy of axis calibration.

[0037] Reference Figure 4 and Figure 6 As shown: The telescopic assembly 321 includes a movable rod 3211, a spherical protrusion 3212, and a spring 3213; the axis of the movable rod 3211 passes through the axis of the calibration ring 2, and the movable rod 3211 is slidably connected to the mounting plate 31; the spherical protrusion 3212 is disposed at one end of the movable rod 3211 facing the center of the calibration ring 2; the spring 3213 is sleeved on the movable rod 3211, and the two ends of the spring 3213 abut against the spherical protrusion 3212 and the mounting plate 31, respectively.

[0038] When the calibration auxiliary structure 3 moves radially toward the steel pipe along the calibration ring 2, the spherical protrusion 3212 of the telescopic component 321 first contacts the outer wall of the steel pipe. If the steel pipe is tilted downward, the spherical protrusion 3212 near the end of the mounting plate 31 in the telescopic component 321 at the upper end of the steel pipe will preferentially contact the outer wall of the steel pipe. The outer wall of the steel pipe exerts a radially outward squeezing force on the spherical protrusion 3212. This squeezing force overcomes the elastic force of the spring 3213 and pushes the movable rod 3211 away from the center of the calibration ring 2. The sliding motion of the telescopic component 321 allows it to retract. During this process, the spherical protrusion 3212, due to its arc-shaped structure, maintains stable contact with the outer wall of the steel pipe, preventing contact loss due to unevenness of the steel pipe surface. When the movable rod 3211 slides and retracts, the spring 3213 sleeved on the outside is compressed due to the movement of the spherical protrusion 3212. The length of the spring 3213 shortens, and its elastic potential energy increases. The reverse elastic force generated by the spring 3213 continues to act on the spherical protrusion 3212, ensuring that the spherical protrusion 321... 2. The spring 3213 provides a tight fit with the outer wall of the steel pipe. Even with minor vibrations in the steel pipe, the spring force compensation maintains the contact state, ensuring the continuity of subsequent sliding volume monitoring. When the composite fine-tuning component 1 adjusts the angle of the inclined steel pipe according to the data from the ranging component 322, the squeezing force of the outer wall of the steel pipe on the spherical protrusion 3212 gradually decreases. When the squeezing force is less than the spring force of the spring 3213, the spring 3213 begins to release elastic potential energy, pushing the spherical protrusion 3212 towards the center of the calibration ring 2, which in turn drives the movable rod 3211 to slide in the opposite direction, gradually returning to the initial extended position until the axis of the steel pipe is collinear with the axis of the calibration ring 2. The movable rod 3211 is fully reset, and the spring 3213 returns to its initial length. Through the combination of the arc-shaped structure of the spherical protrusion 3212 and the spring force compensation of the spring 3213, the telescopic component 321 is ensured to always be in close contact with the outer wall of the steel pipe. This effectively solves the problem of contact failure caused by unevenness of the steel pipe surface in planar contact, providing a stable foundation for sliding volume monitoring.

[0039] Reference Figure 5 and Figure 7 As shown: The calibration auxiliary structure 3 also includes a radial adjustment structure 34, which includes a first linear actuator 341 for driving the mounting plate 31 to move radially along the calibration ring 2.

[0040] Two straight seam steel pipes to be welded are hoisted onto the support platforms of the two composite micro-adjustment components 1 respectively. The positions of the steel pipes are adjusted so that the welding ends are opposite each other. Then, the docking structure 4 is activated, driving the two calibration rings 2 to approach and precisely dock along the axial direction to form a complete reference ring. Then, the first linear actuator 341 in the radial adjustment structure 34 is activated. The first linear actuator 341 pushes the mounting plate 31 to move radially towards the center of the calibration ring 2. According to the diameter of the straight seam steel pipe, the first linear actuator 341 drives the mounting plate 31 to move a corresponding distance, thereby realizing the axial calibration of straight seam steel pipes of different diameters and improving the versatility of the equipment.

[0041] Reference Figure 7 and Figure 8 As shown: The radial adjustment structure 34 also includes a first guide component 342, which is used to fix the movement path of the mounting plate 31.

[0042] Specifically, the first guide assembly 342 includes a connecting plate 3421 and a plurality of first guide rods 3422. The connecting plate 3421 is connected to the middle of the mounting plate 31. The plurality of first guide rods 3422 are parallel to each other. One end of the first guide rod 3422 is connected to the connecting plate 3421, and the first guide rod 3422 is slidably connected to the calibration ring 2.

[0043] In the initial state, the first linear actuator 341 drives the mounting plate 31 to an initial position away from the center. When the first linear actuator 341 is activated and drives the mounting plate 31 to move, the connecting plate 3421 in the middle drives multiple first guide rods 3422 to slide synchronously with the calibration ring 2. The sliding cooperation between the first guide rods 3422 and the calibration ring 2 restricts the displacement of the mounting plate 31, ensuring that the mounting plate 31 moves smoothly only radially. During the movement, the first guide rods 3422 always remain parallel to each other, and the connecting plate 3421 moves synchronously with the mounting plate 31 without tilting, avoiding the deflection caused by uneven force on the mounting plate 31. Through the rigid support structure formed by the connecting plate 3421 and multiple first guide rods 3422, the lateral force and vibration during the movement of the mounting plate 31 are effectively counteracted, preventing the mounting plate 31 from tilting or shaking.

[0044] Reference Figure 9 As shown: the calibration auxiliary structure 3 has an even number and at least four, and every two calibration auxiliary structures 3 form a group, and the line connecting the two calibration auxiliary structures 3 in a group passes through the center of the calibration ring 2.

[0045] When the straight seam steel pipe tilts downward, the two first monitoring components 32 in the group move towards the straight seam steel pipe synchronously. The telescopic component 321 located at the end of the mounting plate 31 in the first monitoring component 32 at the upper end of the straight seam steel pipe contacts the outer wall of the straight seam steel pipe first, while the telescopic component 321 located in the middle of the mounting plate 31 in the first monitoring component 32 at the lower end of the straight seam steel pipe contacts the outer wall of the straight seam steel pipe first. The two first monitoring components 32 in the group monitor the two side walls supporting the steel pipe in the same direction, thereby avoiding misjudgment of the tilt direction due to one-sided data.

[0046] Reference Figure 1 and Figure 10 As shown: The docking structure 4 includes a first frame 41, a second linear actuator 42, and a second guide assembly 43; the first frame 41 is fixed on one side of the calibration ring 2; the second linear actuator 42 is mounted on the first frame 41 and is used to drive the calibration ring 2 to translate; the second guide assembly 43 is used to fix the direction of movement of the calibration ring 2.

[0047] Specifically, the second guide assembly 43 includes at least two second guide rods 431 and a synchronization plate 432. The second guide rods 431 are slidably connected to the first frame 41, and one end of the second guide rod 431 is fixedly connected to the calibration ring 2. The synchronization plate 432 is fixedly connected to multiple second guide rods 431, and the synchronization plate 432 is connected to the output end of the second linear driver 42.

[0048] After the two straight seam steel pipes to be welded are hoisted onto the two composite fine-tuning components 1 respectively, the two docking structures 4 are activated. The second linear actuator 42 pushes the synchronous plate 432 to move towards the driven calibration ring 2. The synchronous plate 432 drives the multiple second guide rods 431 fixed thereto to move synchronously. The second guide rods 431 slide relative to the first frame 41. Since the second guide rods 431 are fixed to the active calibration ring 2, the active calibration ring 2 moves smoothly along the axial direction with the guide rods. The multiple parallel second guide rods 431 are linked through the synchronous plate 432 to ensure that the active calibration ring 2 does not tilt up or down or left or right during translation and always moves in a straight line along the axial direction, thereby ensuring that the end faces of the two calibration rings 2 are accurately docked.

[0049] Reference Figure 10 and Figure 11 As shown: The docking structure 4 also includes two docking components 44, which are respectively disposed at both ends of the calibration ring 2. The docking components 44 are used for coaxial docking of the two calibration rings 2.

[0050] Specifically, the docking assembly 44 includes a fixing plate 441 and a docking pin 442. The fixing plate 441 is fixedly connected to the calibration ring 2, and a docking hole is provided on the fixing plate 441. One end of the docking pin 442 is connected to the fixing plate 441. When the two calibration rings 2 are docked, the docking pins 442 on the two fixing plates 441 are respectively inserted into the docking holes of the other.

[0051] Two calibration rings 2 are designated as the first calibration ring 2 and the second calibration ring 2, respectively. When the first calibration ring 2 and the second calibration ring 2 approach each other, the mating pin 442 on the first calibration ring 2 approaches the mating hole of the fixing plate 441 of the second calibration ring 2. Due to the guidance of the second guide component 43, the mating pin 442 is inserted into the mating hole. Through the transition fit of "pin-mating hole", the radial displacement of the two calibration rings 2 is forcibly constrained, ensuring that their axes are completely coincident. At the same time, the mating pin 442 on the second calibration ring 2 is inserted into the mating hole of the first calibration ring 2, forming a two-way fit, which further improves the coaxial positioning accuracy and avoids the positioning deviation caused by the one-way fit. The symmetrical mating components 44 at both ends enhance the bending and torsional resistance at the connection of the two calibration rings 2 through the rigid fit between the mating pin 442 and the mating hole.

[0052] Reference Figure 1 and Figure 12 As shown: The calibration structure also includes two fixing structures 5, which are used to fix the two calibration rings 2 that are in contact.

[0053] Specifically, the fixed structure 5 includes a second frame 51, a third linear driver 52, and a claw 53. The second frame 51 is located on the same side of the two calibration rings 2. The third linear driver 52 is mounted on the second frame 51. The claw 53 is connected to the output end of the third linear driver 52. The claw 53 has a slot that mates with the two fixed plates 441.

[0054] When the two calibration rings 2 are docked, the two fixing structures 5 are activated, and the third linear actuator 52 is activated. Its output end pushes the claw 53 to move towards the calibration ring 2. As the claw 53 continues to move, the inner groove of its claw gradually approaches the fixing plate 441 after the two calibration rings 2 are docked. The third linear actuator 52 continues to apply a certain pressure, so that the groove tightly locks the fixing plate 441. Through the rigid connection between the fixing plate 441 and the calibration ring 2, the two abutting calibration rings 2 are indirectly fixed. After fixing, the radial and axial displacement of the calibration rings 2 are restricted, so that the subsequent calibration auxiliary structure 3 can apply extrusion force to the steel pipe and the calibration rings 2 will not shift.

[0055] Reference Figure 1 As shown: A circumferential weld auxiliary device, including a straight seam steel pipe angle fine adjustment mechanism.

[0056] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A straight seam steel pipe angle fine-tuning mechanism, comprising two composite fine-tuning components (1) capable of horizontal and vertical fine-tuning, characterized in that, A calibration structure for calibrating the axes of two straight seam steel pipes is provided between the two composite fine-tuning components (1). The calibration structure includes two calibration rings (2), multiple calibration auxiliary structures (3), and two docking structures (4). Multiple mounting bases (21) are provided on the calibration ring (2), and two calibration rings (2) are connected to each other to form a complete calibration ring; Multiple calibration auxiliary structures (3) are respectively set on the mounting base (21) of the two calibration rings (2). The calibration auxiliary structure (3) includes a mounting plate (31), a first monitoring component (32) and a second monitoring component (33). The middle part of the mounting plate (31) is connected to the calibration ring (2). The first monitoring component (32) and the second monitoring component (33) are respectively set at both ends of the mounting plate (31). When the first monitoring component (32) contacts the outer wall of the inclined steel pipe, the first monitoring component (32) conforms to the outer wall of the steel pipe and undergoes corresponding deformation. The second monitoring component (33) has the same function as the first monitoring component (32). Two docking structures (4) are used to drive the two calibration rings (2) to dock and separate.

2. The straight seam steel pipe angle fine-tuning mechanism according to claim 1, characterized in that, The first monitoring component (32) includes multiple telescopic components (321) and multiple ranging components (322). Multiple telescopic components (321) are arranged at equal intervals from the ends of the mounting plate (31) toward the center, and the telescopic components (321) are slidably connected to the mounting plate (31); Multiple ranging components (322) correspond one-to-one with multiple telescopic components (321). The ranging components (322) are used to monitor the amount of sliding of the telescopic components (321) relative to the mounting plate (31).

3. The straight seam steel pipe angle fine-tuning mechanism according to claim 2, characterized in that, The telescopic assembly (321) includes a movable rod (3211), a spherical protrusion (3212), and a spring (3213). The axis of the movable rod (3211) passes through the axis of the calibration ring (2), and the movable rod (3211) is slidably connected to the mounting plate (31); The spherical protrusion (3212) is located at one end of the movable rod (3211) facing the center of the calibration ring (2); The spring (3213) is sleeved on the movable rod (3211), and the two ends of the spring (3213) abut against the spherical protrusion (3212) and the mounting plate (31) respectively.

4. The straight seam steel pipe angle fine-tuning mechanism according to claim 1, characterized in that, The calibration auxiliary structure (3) also includes a radial adjustment structure (34), which includes a first linear actuator (341) for driving the mounting plate (31) to move radially along the calibration ring (2).

5. The straight seam steel pipe angle fine-tuning mechanism according to claim 4, characterized in that, The radial adjustment structure (34) also includes a first guide assembly (342) for fixing the movement path of the mounting plate (31).

6. The straight seam steel pipe angle fine-tuning mechanism according to claim 1, characterized in that, The calibration auxiliary structure (3) has an even number and at least four, and every two calibration auxiliary structures (3) form a group, with the line connecting the two calibration auxiliary structures (3) in a group passing through the center of the calibration ring (2).

7. The straight seam steel pipe angle fine-tuning mechanism according to claim 1, characterized in that, The docking structure (4) includes a first frame (41), a second linear drive (42), and a second guide assembly (43); The first frame (41) is fixed to one side of the calibration ring (2); The second linear actuator (42) is mounted on the first frame (41) and is used to drive the calibration ring (2) to translate. The second guide component (43) is used to fix the direction of movement of the calibration ring (2).

8. The straight seam steel pipe angle fine-tuning mechanism according to claim 7, characterized in that, The docking structure (4) also includes two docking components (44), which are respectively set at both ends of the calibration ring (2). The docking components (44) are used for coaxial docking of the two calibration rings (2).

9. The straight seam steel pipe angle fine-tuning mechanism according to claim 1, characterized in that, The calibration structure also includes two fixing structures (5), which are used to fix the two calibration rings (2) that are in contact.

10. An auxiliary device for circumferential seam welding, characterized in that, Including a straight seam steel pipe angle fine adjustment mechanism as described in any one of claims 1-9.

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