Large petrochemical pipe welding apparatus and method
By combining elbow clamps, Y-shaped clamps, and rotary welding mechanisms, the problem of connecting bent and straight pipes was solved, enabling rapid, precise connection and high-quality welding of large petrochemical pipelines, thus improving welding efficiency and automation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HUBEI QIAOGUANG PETROCHEM EQUIP CO LTD
- Filing Date
- 2026-04-14
- Publication Date
- 2026-06-05
AI Technical Summary
Existing petrochemical pipeline welding equipment is difficult to achieve accurate connection between bent and straight pipes, has poor applicability, and is difficult to manually position and connect large petrochemical pipelines.
The combination of elbow pressure rod, Y-shaped clamp and rotary welding mechanism enables fast and accurate connection between bent pipe and straight pipe through the arc guidance of elbow pressure rod and the angle adjustment of Y-shaped clamp. Combined with the design of arc edge plate and guide ring, automatic avoidance and welding surface expansion are achieved during the welding process.
It significantly improves the adaptability and positioning accuracy of connecting bent and straight pipes, enhances weld quality and density, reduces human error, and achieves an efficient and automated welding process.
Smart Images
Figure CN122142598A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of pipeline welding technology, specifically a large-scale petrochemical pipeline welding device and method. Background Technology
[0002] Petrochemical pipelines are specialized pipeline systems used to transport fluids such as oil, natural gas, and chemical raw materials. They typically consist of pipe bodies, valves, and support structures, and are core facilities connecting oil fields, refineries, and consumer markets. Modern welding equipment usually employs computer control systems, which can precisely control welding parameters (current, voltage, welding speed, etc.) to ensure stable weld quality.
[0003] The prior art document application number CN118081158B discloses a petrochemical pipeline welding device with automatic alignment function, specifically relating to the technical field of petrochemical pipeline welding devices. It includes two support frames and a hoist. The inner surface of the two support frames is jointly provided with a positioning and alignment structure. The lower end of the positioning and alignment structure is symmetrically provided with grippers on the left and right sides. The lower center of the positioning and alignment structure is provided with a welding structure. The hoist is fixedly connected to the positioning and alignment structure via a steel cable. This petrochemical pipeline welding device with automatic alignment function automatically aligns the petrochemical pipeline through the cooperation of the hoist, positioning and alignment structure, grippers, and welding structure. This reduces the risk of displacement of the petrochemical pipeline during welding, which could lead to misalignment at the weld joint, affecting the welding quality and usability of the petrochemical pipeline. Furthermore, the device uses a lifting component and a welding guide component to shield the petrochemical pipeline weld seam, preventing wind, sand, or other external factors from affecting the welding effect.
[0004] While the aforementioned comparative documents achieve automatic alignment of petrochemical pipelines, reducing the problem of misalignment at the welding joint caused by pipeline displacement during welding, which affects the welding quality of petrochemical pipelines, they mainly connect two straight pipes and cannot solve the problem of accurate connection between bent pipes and straight pipes, resulting in poor applicability of the device; moreover, large petrochemical pipelines are difficult to manually position and connect. Summary of the Invention
[0005] The purpose of this invention is to provide a large-scale petrochemical pipeline welding device and method that can adapt to different types of pipeline connections and extended welding surfaces, so as to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a large-scale petrochemical pipeline welding device, comprising a welding table, a ring block fixedly connected to the center of the welding table, an industrial camera fixedly connected to the inner cavity of the top of the ring block, a support frame fixedly passing through one side of the welding table, an arc-shaped plate fixedly connected to the top of the support frame, and a groove formed on the other side of the welding table, and further comprising:
[0007] A rapid positioning mechanism, which is connected to the ring block;
[0008] A rotary welding mechanism, which is located on the ring block and abuts against the quick positioning mechanism;
[0009] The rapid positioning mechanism includes a first cylinder that is equidistantly fixed to the side wall of the ring block. Several first cylinders are provided. Each first cylinder has a push plate fixed to its output end. Each push plate has a sliding elbow rod connected to its inner cavity. The elbow rods have their bends extending outward toward the outside of the pipe to form a bidirectional guiding arc surface. The inner sides of the multiple elbow rods abut against the outer wall of the petrochemical pipe.
[0010] Preferably, the rapid positioning mechanism further includes a second cylinder deflected and connected to the welding table. A Y-shaped clamp is fixedly connected to the output end of the second cylinder, and a rubber ring is fitted onto the outer wall of the Y-shaped clamp. The middle part of the outer wall of the second cylinder is rotatably connected to the welding table via a rotating shaft. Several slots are formed on both sides of the outer wall of the second cylinder along an arc-shaped trajectory. An electric magnetic suction block is also fixedly connected to the welding table. The electric magnetic suction block is inserted into the slot to limit the outer wall of the second cylinder.
[0011] Preferably, the sidewalls of the first cylinder away from the ring block are all fixedly connected to sliding groove plates, and the inner cavities of the sliding groove plates are all slidably connected to cross plates.
[0012] Preferably, each of the ends of the plurality of elbow pressure rods is fixedly connected to a vertical rod, and the ends of the vertical rods are slidably sleeved on the outer wall of the horizontal plate.
[0013] Preferably, the rotary welding mechanism includes a toothed ring rotatably connected to the middle of the ring block, a gear meshing with the outer wall of the toothed ring, a drive motor fixedly connected to the top of the welding table, and the center of the gear fixedly connected to the output end of the drive motor.
[0014] Preferably, a groove box is laterally fixed to the inner side of the toothed ring, and a welding head is slidably connected to the outer wall of the groove box. The end of the welding head is oriented toward the axis of the ring block and communicates with the electric push rod.
[0015] Preferably, a guide ring is fixed to the inner edge of the ring block, and the inner cavity of the guide ring is provided with a wave groove.
[0016] Preferably, an L-shaped sliding column is fixedly connected to the outer wall of the welding head, and the outer wall of the L-shaped sliding column slides against the corrugated groove of the guide ring.
[0017] Preferably, an arc-shaped edge plate is fixed to the side of the welding head near the elbow pressure rod, and the end of the arc-shaped edge plate extends to the front side of the welding head.
[0018] This application also proposes a method for using a large-scale petrochemical pipeline welding device, the method of which is as follows:
[0019] S1. Before welding, the two sections of petrochemical pipeline must be installed and connected. Whether it is welding two straight pipes or welding a straight pipe and a bend, the straight pipe is placed on the arc plate and the end of the other section of the pipeline to be welded is connected to it.
[0020] S2. During clamping and positioning, the support frame is equipped with an electric cylinder to drive the arc plate upward to lift the petrochemical pipe. In conjunction with the push plate driven by several first cylinders, multiple elbow pressure rods abut against the surface of the petrochemical pipe, clamping the petrochemical pipe in the center. At this time, the pipe axis is consistent with the axis of the ring block.
[0021] S3. Another section of the bent or straight pipe to be welded is transported to the welding table position by a transfer device. When the pipe is joined, the end of the bent or straight pipe contacts the surface of multiple elbow pressure rods, guides it to be centered, and quickly and accurately joins with the clamped straight pipe. Then, it is supported by a Y-shaped clamp and, with the help of the pipe's gravity, completes the positioning of the two pipe sections.
[0022] S4. During welding, the toothed ring is driven by the drive motor, and then the welding head is made to rotate to weld the joint. During this process, the guide ring assists the welding head to weld in a reciprocating wave trajectory, expanding the welding surface.
[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0024] (1) This invention achieves rapid and accurate docking of bent pipes with straight pipes or double straight pipes by setting up a combination of structures such as elbow pressure rods, Y-shaped clamps and push plates. When the first section of straight pipe is lifted by the arc plate and clamped by multiple elbow pressure rods at multiple points, the elbow pressure rods are tightly attached to the pipe surface and remain stationary. The end of the other section of pipe to be docked slides naturally along the arc surface of the elbow pressure rod during the pushing process and is guided to the coaxial and centered position with the first section of pipe. At the same time, the Y-shaped clamp rotates to the appropriate angle according to the pipe type (straight pipe or bent pipe) and abuts and supports, forming auxiliary positioning. Compared with the existing devices that can only align straight pipes, this invention can adapt to pipes with different bending radii and sizes by using the arc guidance of the elbow pressure rods and the adjustable angle of the Y-shaped clamps, which significantly improves the docking adaptability and positioning accuracy of irregular pipes such as bent pipes and straight pipes.
[0025] (2) This invention achieves the dual functions of automatic avoidance of clamping structure and expansion of welding surface during welding by setting up the cooperation of structures such as arc edge plate, L-shaped sliding column and guide ring. During welding, the first cylinder drives the retraction to change the elbow pressure rod from a tight clamping state to lightly touching the pipe surface. Since the arc edge plate extends to the front side of the welding head, when the toothed ring drives the welding head to rotate, the arc edge plate reaches the elbow pressure rod position before the welding head, and pushes the elbow pressure rod away from the joint area along the push plate direction through the arc-shaped pressing action, so that the elbow pressure rod maintains a safe distance outside the movement trajectory of the welding head and avoids interference. At the same time, the L-shaped sliding column slides in the wave groove of the guide ring, driving the welding head to reciprocate and swing synchronously during the rotation, so that the weld width increases and the molten air bubbles have enough space to be discharged. Compared with traditional fixed trajectory welding, this invention effectively avoids the interference of clamping structure on the welding process through the active avoidance of arc edge plate and the reciprocating swing of wave trajectory, and significantly improves the weld quality and density. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;
[0027] Figure 2 This is a schematic diagram showing the structural fit between the ring block and the welding station of the present invention;
[0028] Figure 3 This is a schematic diagram showing the structural fit between the second cylinder and the welding station of the present invention;
[0029] Figure 4 This is a schematic diagram showing the structural fit between the elbow pressure rod and the push plate of the present invention;
[0030] Figure 5 This is a schematic diagram showing the structural fit between the welding head and the arc-edge plate of the present invention;
[0031] Figure 6 This is a schematic diagram of the three-dimensional side section structure of the present invention;
[0032] Figure 7 For the present invention Figure 6 A magnified view of the structure at point A in the middle;
[0033] Figure 8 This is a schematic diagram showing the structural fit between the L-shaped sliding post and the guide ring of the present invention;
[0034] Figure 9 For the present invention Figure 8 A magnified schematic diagram of the structure at point B in the middle.
[0035] In the picture:
[0036] 100. Welding table; 200. Support frame; 300. Arc plate; 400. Ring block; 500. Quick positioning mechanism; 510. First cylinder; 520. Horizontal plate; 530. Elbow pressure rod; 540. Second cylinder; 550. Y-shaped clamp; 560. Slide plate; 570. Vertical rod; 580. Push plate; 600. Rotary welding mechanism; 610. Drive motor; 620. Gear; 630. Gear ring; 640. Guide ring; 650. Welding head; 660. Arc edge plate; 670. Slot box; 680. L-shaped sliding column; 700. Industrial camera. Detailed Implementation
[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0038] like Figures 1 to 9 As shown, the present invention provides a large-scale petrochemical pipeline welding device, including a welding table 100, a ring block 400 fixedly connected to the middle of the welding table 100, an industrial camera 700 fixedly connected to the inner cavity of the top of the ring block 400, a support frame 200 fixedly passing through one side of the welding table 100, an arc-shaped plate 300 fixedly connected to the top of the support frame 200, and a groove formed on the other side of the welding table 100. The device also includes:
[0039] The rapid positioning mechanism 500 is connected to the ring block 400;
[0040] A rotary welding mechanism 600 is located on the ring block 400 and abuts against the quick positioning mechanism 500.
[0041] The rapid positioning mechanism 500 includes a first cylinder 510 that is equidistantly fixed to the side wall of the ring block 400. Several first cylinders 510 are provided. Each first cylinder 510 has a push plate 580 fixed to its output end. Each push plate 580 has a slidably connected elbow pressure rod 530 in its inner cavity. The elbows of the elbow pressure rods 530 are bent and extended outward toward the outside of the pipeline to form a bidirectional guiding arc surface. The inner sides of the multiple elbow pressure rods 530 abut against the outer wall of the petrochemical pipeline.
[0042] The above solution involves installing a ring block 400 on the welding table 100. An industrial camera 700 is fixed to the inner cavity of the top of the ring block 400 for real-time monitoring of the precision of the pipe welding process. A support frame 200, fixedly connected to one side of the welding table 100, supports an arc-shaped plate 300, which provides stable support and position guidance during welding. The ring block 400 is connected to a rapid positioning mechanism 500, ensuring accurate pipe positioning during welding. The rapid positioning mechanism 500 includes multiple first cylinders 510 equidistantly fixed to the side wall of the ring block 400. The output end of the first cylinder 510 is connected to an elbow pressure rod 530 via a push plate 580. The elbow pressure rod 530 slides into the inner cavity of the push plate 580. The elbow pressure rod 530 is designed to precisely clamp the pipe according to its shape, while its bend extends in two directions, ensuring both rapid pipe connection and no interference with the welding area. During the docking process, the elbow pressure rod 530 makes close contact with the outer wall of the petrochemical pipeline, stabilizing the pipeline's position and ensuring that it does not shift during docking, thus guaranteeing welding accuracy. The rotary welding mechanism 600, through contact with the quick positioning mechanism 500, performs rotary welding, achieving continuous circular welding action, thereby significantly improving welding efficiency and quality. Overall, these structural components coordinate with each other, ensuring a smooth and high-precision welding process.
[0043] like Figures 4 to 7 As shown, the rapid positioning mechanism 500 also includes a second cylinder 540 deflectedly connected to the welding table 100. A Y-shaped clamp 550 is fixedly connected to the output end of the second cylinder 540, and a rubber ring is sleeved on the outer wall of the Y-shaped clamp 550. A sliding groove plate 560 is fixedly connected to the side wall of the first cylinder 510 away from the ring block 400, and a horizontal plate 520 is slidably connected to the inner cavity of the sliding groove plate 560. A vertical rod 570 is fixedly connected to the end of a plurality of bent pressure rods 530, and the end of the vertical rod 570 is slidably sleeved on the outer wall of the horizontal plate 520. The middle part of the outer wall of the second cylinder 540 is rotatably connected to the welding table 100 through a rotating shaft. Several slots are opened on both sides of the outer wall of the second cylinder 540 along an arc trajectory. An electric magnetic suction block is also fixedly connected to the welding table 100. The electric magnetic suction block is inserted into the slot to limit the outer wall of the second cylinder 540.
[0044] The above solution is adopted: (Reference) Figures 2-3It is known that several slots are formed on both sides of the outer wall of the second cylinder 540 along an arc-shaped trajectory. An electric magnetic clamping block is then inserted into these slots for positioning. When the second cylinder 540 is rotated to adjust the angle of the Y-shaped clamp 550, the system is energized to unlock the magnetic clamping block until it is locked in the appropriate position. The electric magnetic clamping block is existing technology and will not be described in detail here. Before docking, a straight pipe is placed securely on the surface of the arc-shaped plate 300 and initially fixed using clamps. Subsequently, driven by an electric cylinder or electric cylinder within the support frame 200, the arc-shaped plate 300 slowly rises vertically, lifting the pipe to the predetermined welding position. During this process, several first cylinders 510 are simultaneously activated, pushing the elbow pressure rod 530 located on the inner push plate 580 towards the surface of the petrochemical pipe, allowing the pipe to be evenly clamped at multiple points. This operation not only centers and fixes the pipe but also ensures that the pipe's axis aligns with the axis of the ring block 400, laying the foundation for subsequent high-precision docking and welding. The pipe needs to be properly tightened during clamping to prevent displacement during subsequent operations, which could affect welding quality. After fixing the first pipe section, the operator must select a suitable clamping scheme based on whether the other pipe section to be welded is straight or bent. The second cylinder 540 is rotated to an appropriate angle according to welding requirements, and the Y-shaped clamp 550 is pushed out to abut the pipe to be welded, providing initial support. Subsequently, the operator pushes and fine-tunes the pipe so that its end contacts the multiple elbow pressure rods 530. During this process, the elbow pressure rods 530 are in close contact with the surface of the first pipe section and remain relatively stationary, guiding the end of the second pipe section to center along its curvature for precise docking. After docking, the position of the second cylinder 540 can be locked with clips to ensure the pipe remains stable before welding, preventing positional displacement and providing a reliable support foundation for subsequent welding.
[0045] like Figure 4 , Figure 5 , Figure 8 and Figure 9As shown, the rotary welding mechanism 600 includes a gear ring 630 rotatably connected to the middle of the ring block 400, a gear 620 meshing with the outer wall of the gear ring 630, a drive motor 610 fixedly connected to the top of the welding table 100, and the center of the gear 620 fixedly connected to the output end of the drive motor 610; a slot box 670 is laterally fixed to the inner side of the gear ring 630, and a welding head 650 is slidably connected to the outer wall of the slot box 670, with the end of the welding head 650 facing the ring block 400. The axial center of the 00 is connected to the electric actuator; a guide ring 640 is fixed to the inner edge of the ring block 400, and a wave groove is opened in the inner cavity of the guide ring 640; an L-shaped sliding column 680 is fixed to the outer wall of the welding head 650, and the outer wall of the L-shaped sliding column 680 slides against the wave groove of the guide ring 640; an arc edge plate 660 is fixed to the side of the welding head 650 near the elbow pressure rod 530, and the end of the arc edge plate 660 extends to the front side of the welding head 650.
[0046] The above scheme is adopted as follows: During the welding stage, the system drives the gear 620 to rotate via the drive motor 610. The gear 620 meshes with the gear ring 630, causing the gear ring 630 to rotate synchronously. The gear ring 630 further drives the internally fixed groove box 670 to rotate, and the welding head 650 sliding on the groove box 670 also rotates accordingly. At the same time, the arc edge plate 660 and the L-shaped sliding column 680 also move synchronously. It is worth noting that the arc edge plate 660 is located in front of the welding head 650, so during the rotation, it will reach the position of the elbow pressure rod 530 before the welding head 650. As the system rotates further, the first cylinder 510 begins to retract, causing the elbow pressure rod 530 to change from being tightly attached to the pipe to lightly touching the pipe surface. Therefore, during the process of the arc edge plate 660 and the elbow pressure rod 530 being in close contact, the curvature of the arc edge plate 660 guides the elbow pressure rod 530 towards the push plate 580 through continuous compression. This action is precisely completed by the sliding guide of the vertical rod 570 within the horizontal plate 520, ensuring that the elbow pressure rod 530 maintains a safe distance outside the pipe joint area, avoiding interference with the movement trajectory of the welding head 650, thus ensuring smooth welding. Furthermore, under the precise guidance of the guide ring 640, the L-shaped sliding column 680 slides along the corrugated groove, causing the welding head 650 to reciprocate while rotating. This motion not only allows the welding head 650 to continuously oscillate along the joint surface for welding but also effectively expands the welding area, improving the uniformity and density of the weld. Simultaneously, the reciprocating motion creates a larger melting space, facilitating the smooth discharge of gases and molten bubbles generated during welding, significantly reducing the probability of weld porosity defects, thereby improving weld quality and joint reliability. Throughout the welding process, fully automated collaborative operation is achieved, from initial pipe positioning and precise clamping to dynamic welding. Multi-point clamping and the guidance of the arc-edge plate 660 not only ensure precise alignment of the pipe axis but also reduce human error and improve welding efficiency. With the 650° rotation and oscillation of the welding head, the temperature distribution on the joint surface is more uniform, which is beneficial to the stability of the molten pool and maximizes the weld strength. The design of the entire system fully considers the pipe size, bending radius, and characteristics of the welding materials, and can adapt to the docking requirements of different types of pipes, realizing highly automated and intelligent welding operations.
[0047] This application also proposes a method for using a large-scale petrochemical pipeline welding device, the method of which is as follows:
[0048] S1. Before welding, the two sections of petrochemical pipeline must be installed and connected. Whether it is welding two straight pipes or welding a straight pipe and a bend, the straight pipe is placed on the arc plate 300 and the end of the other section of the pipeline to be welded is connected to it.
[0049] S2. During clamping and positioning, the support frame 200 is equipped with an electric cylinder to drive the arc plate 300 to lift the petrochemical pipe upward. This is coordinated with the push plate 580 driven by several first cylinders 510, and multiple elbow pressure rods 530 abut against the surface of the petrochemical pipe to clamp the petrochemical pipe in the center. At this time, the pipe axis is consistent with the axis of the ring block 400.
[0050] S3. Another section of the bent or straight pipe to be welded is transported to the welding table 100 via a transfer device. During the connection, the end of the bent or straight pipe contacts the surface of multiple elbow pressure rods 530, which guides it to be centered and quickly and accurately connects it with the clamped straight pipe. Then, it is supported by the Y-shaped clamp 550 and, with the help of the pipe's gravity, the positioning of the two pipe sections is completed.
[0051] S4. During welding, the toothed ring 630 is driven by the drive motor 610, and then the welding head 650 is made to rotate to weld the joint. During this process, the guide ring 640 assists the welding head 650 to weld in a reciprocating wave trajectory to expand the welding surface.
[0052] Working principle and usage process of this invention:
[0053] First, regardless of whether it's welding a double straight pipe or a bend to a straight pipe, a section of straight pipe is placed on the surface of the arc plate 300 for initial clamping and positioning. Driven by an electric cylinder within the support frame 200, the arc plate 300 is used to lift the petrochemical pipe to the appropriate position. Simultaneously, several first cylinders 510 drive the push plate 580 towards the inside of the ring block 400. The elbow pressure rods 530 on the push plate 580 move towards the petrochemical pipe, eventually abutting against its surface, thus clamping the petrochemical pipe centrally and securely. This ensures the pipe's axis aligns with the ring block 400's axis, facilitating accurate butt jointing and welding.
[0054] Furthermore, depending on whether the other section of pipe to be welded is a bend or a straight pipe, the second cylinder 540 can be manually rotated to a suitable angle so that the opening direction of the Y-shaped clamp 550 is consistent with the axial direction of the pipe to be connected. The position of the second cylinder 540 is locked by the magnetic clamp to keep it fixed at this angle. Then, the second cylinder 540 is activated, and its output end extends and pushes the Y-shaped clamp 550 against the outer wall of the pipe to be connected. The rubber ring sleeved on the outside of the Y-shaped clamp 550 elastically fits against the surface of the pipe. Since the large pipe itself is heavy, it can automatically clamp in the middle of the Y-shaped clamp 550 as a preliminary support without the need for additional fixing devices to limit the position, and avoids the problem of cumbersome operation when positioning large pipes. Then, the process of pipe end docking is carried out. The pipe is pushed and adjusted by external machinery towards the center of multiple elbow pressure rods 530. At this time, the pipe end contacts the surface of the elbow pressure rod 530. Since the elbow pressure rod 530 is tightly abutting against the pipe surface, the elbow pressure rod 530 remains stationary. The docking pipe end can be guided to the center along the arc of the elbow pressure rod 530, realizing fast and accurate docking. The current docking state can be maintained by the magnetic suction block being locked into the slot position of the second cylinder 540 through system control, completing the automatic positioning of the two pipe sections and avoiding the problem of large pipes being difficult to manually dock and position.
[0055] During the welding process, the drive motor 610 drives the gear 620 to rotate. The gear 620 meshes with the gear ring 630, causing the gear ring 630 to rotate. The gear ring 630 synchronously drives the inner fixed groove box 670 to rotate synchronously. The welding head 650, which slides on the groove box 670, also rotates accordingly. The arc-edge plate 660 and the L-shaped sliding column 680 also rotate, thus performing preliminary local welding. After the preliminary local welding, the arc-edge plate 660 approaches the elbow pressure rod 530. Because the arc-edge plate 660 extends in front of the welding head 650, it reaches the elbow pressure rod 530 before the welding head 650. When the arc-edge plate 660 abuts against the surface of the elbow pressure rod 530, the two form a continuous close-fitting compression through the matching arc contours. During the rotation, the arc-edge plate 660 applies a pushing force to the elbow pressure rod 530, forcing the elbow pressure rod 530 to move smoothly along the sliding guide structure of the vertical rod 570 and the horizontal plate 520 until the arc-edge plate 660 squeezes the elbow pressure rod 530 away from the joint area. The elbow pressure rod 530 is gradually pushed away from the pipe joint area and stays in a safe position under the holding state of the first cylinder 510. This ensures that the welding head 650 following behind is not interfered with by the elbow pressure rod 530 during the rotation welding process, realizing spatial avoidance between the clamping structure and the welding trajectory, so that the welding head 650 following behind can be welded into place in real time in one go. This ensures that the elbow pressure rod 530 does not obstruct the welding process. In this way, it can automatically position and connect large pipes, and the positioning method will not affect the subsequent welding, so that the equipment can weld into place in one go.
[0056] It is worth noting that, due to the weight of large petrochemical pipelines, the elbow rod 530 can be pushed without affecting the position of the pipeline, and due to the initial welding, the elbow rod 530 will not move the pipeline when it moves.
[0057] Furthermore, under the guidance of the guide ring 640, the L-shaped sliding column 680 always slides along the wave groove of the guide ring 640, so that the welding head 650 continues to reciprocate during the rotation, thereby causing the welding head 650 to swing back and forth along the joint for welding, achieving the effect of expanding the welding surface, so that the molten air bubbles can have enough space to escape during the welding process, effectively avoiding welding porosity defects.
[0058] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0059] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A large-scale petrochemical pipeline welding device, comprising a welding table (100), wherein a ring block (400) is fixedly connected to the middle of the welding table (100), an industrial camera (700) is fixedly connected to the inner cavity of the top of the ring block (400), a support frame (200) is fixedly inserted through one side of the welding table (100), an arc-shaped plate (300) is fixedly connected to the top of the support frame (200), and a groove is provided on the other side of the welding table (100), characterized in that: Also includes: A quick positioning mechanism (500) is connected to a ring block (400); A rotary welding mechanism (600) is located on a ring block (400) and abuts against a quick positioning mechanism (500); The rapid positioning mechanism (500) includes a first cylinder (510) fixed at equal intervals to the side wall of the ring block (400). Several first cylinders (510) are provided. Each first cylinder (510) has a push plate (580) fixed to its output end. Each push plate (580) has a slidably connected elbow pressure rod (530) in its inner cavity. The elbow head of each elbow pressure rod (530) bends and extends outward toward the outside of the pipeline to form a bidirectional guiding arc surface. The inner sides of multiple elbow pressure rods (530) abut against the outer wall of the petrochemical pipeline.
2. The large-scale petrochemical pipeline welding device according to claim 1, characterized in that: The rapid positioning mechanism (500) further includes a second cylinder (540) deflected and connected to the welding table (100). The output end of the second cylinder (540) is fixedly connected to a Y-shaped clamp (550). A rubber ring is fitted on the outer wall of the Y-shaped clamp (550). The middle part of the outer wall of the second cylinder (540) is rotatably connected to the welding table (100) through a rotating shaft. Several slots are opened on both sides of the outer wall of the second cylinder (540) along an arc trajectory. An electric magnetic suction block is also fixedly connected to the welding table (100). The electric magnetic suction block is inserted into the slot to limit the outer wall of the second cylinder (540).
3. The large-scale petrochemical pipeline welding device according to claim 2, characterized in that: The first cylinder (510) has a sliding groove plate (560) fixedly connected to the side wall away from the ring block (400), and the inner cavity of the sliding groove plate (560) is slidably connected to a horizontal plate (520).
4. The large-scale petrochemical pipeline welding device according to claim 3, characterized in that: Each of the multiple elbow pressure rods (530) has a vertical rod (570) fixedly connected to its end, and the ends of the vertical rods (570) are slidably sleeved on the outer wall of the horizontal plate (520).
5. The large-scale petrochemical pipeline welding device according to claim 4, characterized in that: The rotary welding mechanism (600) includes a gear ring (630) rotatably connected to the middle of the ring block (400), a gear (620) meshing with the outer wall of the gear ring (630), a drive motor (610) fixedly connected to the top of the welding table (100), and the center of the gear (620) fixedly connected to the output end of the drive motor (610).
6. The large-scale petrochemical pipeline welding device according to claim 5, characterized in that: The inner side of the toothed ring (630) is laterally fixed with a slotted box (670), and the outer wall of the slotted box (670) is slidably connected with a welding head (650). The end of the welding head (650) is arranged facing the axis of the ring block (400) and is connected to the electric push rod.
7. The large-scale petrochemical pipeline welding device according to claim 6, characterized in that: The inner edge of the ring block (400) is fixed with a guide ring (640), and the inner cavity of the guide ring (640) is provided with a wave groove.
8. The large-scale petrochemical pipeline welding device according to claim 7, characterized in that: The outer wall of the welding head (650) is fixedly connected to an L-shaped sliding column (680), and the outer wall of the L-shaped sliding column (680) slides against the wave groove of the guide ring (640).
9. The large-scale petrochemical pipeline welding device according to claim 8, characterized in that: The welding head (650) is fixed with an arc edge plate (660) on the side near the elbow pressure bar (530), and the end of the arc edge plate (660) extends to the front side of the welding head (650).
10. A method of using a large-scale petrochemical pipeline welding apparatus, applied to the large-scale petrochemical pipeline welding apparatus as described in any one of claims 1 to 9, characterized in that: The usage method is as follows: S1. Before welding, the two sections of petrochemical pipeline need to be installed and connected. Whether it is welding two straight pipes or welding a straight pipe and a bend, the straight pipe is placed on the arc plate (300) and the end of the other section of the pipeline to be welded is connected to it. S2. During clamping and positioning, the support frame (200) is equipped with an electric cylinder drive, which causes the arc plate (300) to lift the petrochemical pipe upward. In conjunction with the push plate (580) driven by several first cylinders (510), multiple elbow pressure rods (530) abut against the surface of the petrochemical pipe, clamping the petrochemical pipe in the center. At this time, the pipe axis is consistent with the axis of the ring block (400). S3. Another section of the bent or straight pipe to be welded is transported to the welding table (100) by a transfer device. When the pipe is joined, the end of the bent or straight pipe contacts the surface of multiple elbow pressure rods (530) to guide it to the center and quickly and accurately join with the clamped straight pipe. Then, it is supported by a Y-shaped clamp (550) and, with the help of the pipe's gravity, the positioning of the two pipe sections is completed. S4. During welding, the toothed ring (630) is driven by the drive motor (610), and then the welding head (650) is made to rotate to weld the joint. During this process, the guide ring (640) assists the welding head (650) to weld in a reciprocating wave trajectory to expand the welding surface.