Anti-deformation tooling for large pipe diameter pipe welding

Abstract

The utility model provides a deformation prevention tool type frock for big pipe diameter pipeline welding, including base and V type rocker arm of lower end articulation in the recess in the middle of base, the symmetrical fixed support short foot of distribution is used to support the same side rocker of V type rocker arm in the upper end face of base, be equipped with the annular main frame in the V type area of V type rocker arm, be equipped with the hydraulic support arm of being located in the outside of support short foot and with the same side outer wall contact of V type rocker arm on the base, the horizontal state and the axial position of the pipeline to be welded are carried out the coarse adjustment through the hydraulic support arm, the annular main frame is uniformly distributed with a plurality of radial adjusting mechanism on the circumference, the utility model has solved the problem that the welding quality is poor, the construction efficiency is low, the manpower cost is high because of poor adaptability, low centering accuracy, weak deformation prevention effect, complicated operation in the butt joint welding of big pipe diameter coal gas pipeline field, realize the axial quick and accurate centering of two pipeline, effectively restrain the welding thermal deformation, improve the welding quality and construction efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline welding technology, specifically relating to a deformation-resistant tool for welding large-diameter pipelines. Background Technology

[0002] During on-site welding operations for large-diameter gas pipelines, issues such as misalignment, center offset, and uneven welds can easily arise due to factors such as the pipeline's own weight, misalignment, and welding thermal deformation. These problems directly reduce welding quality and pose potential safety hazards during construction.

[0003] Traditional adjustment methods rely heavily on hoisting equipment and manual labor, using conventional tools such as jacks and tensioners for coarse adjustments. This approach has significant limitations: first, low alignment accuracy, failing to meet the axial alignment requirements for high-quality welding; second, time-consuming adjustments requiring repeated testing, impacting construction efficiency; third, prone to springback deformation after adjustment, rendering previous work ineffective; and fourth, requiring multiple operators, resulting in high labor costs and significant coordination difficulties. Especially when gas pipeline diameters exceed 2 meters, the adaptability and controllability of traditional tools become further limited, failing to achieve rapid and precise axial alignment during pipeline connection and hindering effective control of thermal deformation during welding. This severely restricts the quality and progress of large-diameter gas pipeline construction. Therefore, improvements are necessary to address these issues. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a deformation-resistant tool for welding large-diameter pipes. A circular main frame with multiple radially distributed adjustment mechanisms is set within the V-shaped area of ​​a V-shaped rocker arm hinged in the middle of the base. Two short supporting legs and a hydraulic support arm on the base provide low-position support and angle adjustment for the V-shaped rocker arm. This allows for adjustment of the horizontal state and axial position of the pipe to be welded, which is fixed by the circular main frame. This solves the problems of poor welding quality, low construction efficiency, and high labor costs in existing large-diameter gas pipeline butt welding due to poor adaptability, low alignment accuracy, weak deformation prevention, and complex operation. It achieves rapid and accurate alignment of the axial center of two pipe sections, effectively suppressing welding thermal deformation, improving welding quality and construction efficiency. The structure is reasonable, the operation is simple, the adaptability is strong, it reduces reliance on manual labor, and the safety of the work is high.

[0005] The technical solution adopted in this utility model is as follows: a deformation-resistant tool-type fixture for welding large-diameter pipes, including a base and a V-shaped rocker arm with its lower end hinged in a groove in the middle of the base. The upper end face of the base is symmetrically fixed with short support legs distributed on both sides of the V-shaped rocker arm to support the rocker arm on the same side. The V-shaped area of ​​the V-shaped rocker arm is provided with an annular main frame that contacts its inner wall and is used to fit with the pipe to be welded. The base is provided with a hydraulic support arm located outside the short support legs and in contact with the outer wall of the V-shaped rocker arm on the same side. The horizontal state and axial position of the pipe to be welded are coarsely adjusted by the hydraulic support arm. Multiple radial adjustment mechanisms for fine-tuning the alignment position of the pipe are evenly distributed around the annular main frame.

[0006] The circular main frame includes two C-shaped main frames, namely, a first C-shaped main frame and a second C-shaped main frame, which are identical in structure and symmetrically distributed. The two ends of the first C-shaped main frame and the second C-shaped main frame are detachably and fixed together by a quick-locking device.

[0007] Furthermore, the C-shaped ring main frame includes two parallel C-shaped rings, with multiple connecting blocks evenly distributed between the two C-shaped rings and fixedly connected to the inner wall of the corresponding side ring, and a radial adjustment mechanism is provided on the connecting blocks.

[0008] Furthermore, the quick-locking device is a locking bolt, and the C-ring end has a connecting hole at the butt joint position. The quick-locking device passes through the connecting holes at the corresponding butt joint positions of the four C-rings in the first and second C-ring main frames in sequence and is adapted to connect with the locking nut.

[0009] Furthermore, the radial adjustment mechanism includes a force transmission screw, an adjustment handle, and a clamping block. The force transmission screw is radially distributed along the annular main frame, and the annular main frame contacts the V-shaped rocker arm, such that the V-shaped rocker arm is located between two force transmission screws threaded onto the connecting block. The adjustment handle is fixed to the outer end of the force transmission screw, and the clamping block is connected to the inner end of the force transmission screw. By adjusting the handle and rotating the force transmission screw, the clamping block can be used to clamp and fine-tune the pipe to be welded.

[0010] Furthermore, an anti-slip pad is provided on the end face of the clamping block that contacts the pipe to be welded.

[0011] Furthermore, a laser alignment instrument for projecting reference lines is installed at the center of the top of the annular main frame.

[0012] Furthermore, the hydraulic support arm is a vertically arranged hydraulic cylinder, and the end of the telescopic arm of the hydraulic cylinder is equipped with a pulley that contacts the outer wall of the corresponding side of the V-shaped rocker arm.

[0013] Furthermore, the base is an H-shaped base welded from channel steel.

[0014] Advantages of this utility model compared to the prior art: 1. This technical solution achieves rapid and accurate alignment of the pipe's axis by evenly distributing multiple radial adjustment mechanisms around the circumference of the annular main frame fitted onto the pipe to be welded. Under the synchronous adjustment action of multiple sets of radial adjustment mechanisms, the requirement for fine adjustment of the coaxiality of the axis of the pipe to be welded is met for high-quality welding of large-diameter pipes. 2. The circular main frame of this technical solution provides stable constraint at the pipe joint, and together with the hydraulic support arm, it effectively resists the deformation caused by thermal stress during welding. At the same time, the radial adjustment mechanism can be used to make fine adjustments at any time during the welding process to avoid the accumulation of deformation and further ensure the welding quality. 3. The V-shaped structure of the V-shaped rocker arm in this technical solution, combined with the telescopic hydraulic support arm, can adapt to pipes of different diameters ≥2 meters. With the flexible control of the pipe axis by the hydraulic support arm, it can overcome the impact of uneven sites on construction. The modular circular main frame can be disassembled and assembled through a quick locking device, which is convenient for use in multiple construction sites and reduces equipment investment costs. 4. The overall structure of this technical solution is simple, and one person can complete the main operations of tooling assembly, pipeline adjustment and welding assistance, reducing the reliance on multiple people to cooperate and reducing labor costs. The anti-slip pads on the contact surface between the clamping block and the pipeline and the pulley design of the hydraulic support arm not only ensure operational stability but also avoid damage to equipment and pipelines, thus improving construction safety. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the usage state of this utility model; Figure 2 This is a three-dimensional structural diagram of the present invention; Figure 3 This is a schematic diagram of the planar structure of this utility model; Figure 4 This is a schematic diagram of the radial adjustment mechanism of this utility model. Detailed Implementation

[0016] The following will refer to the embodiments of this utility model. Figure 1-4 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] It should be noted that, unless otherwise stated herein, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] In this document, the terms "comprising," "including," or any other variations thereof are intended to cover a 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 a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0019] Deformation-resistant tooling for welding large-diameter pipes, such as Figure 1-3As shown, the structure includes a base 1 and a V-shaped rocker arm 3 hinged at its lower end within a groove in the middle of the base 1. The base 1 is an H-shaped base welded from channel steel. Supporting short legs 2 are symmetrically fixed to the upper surface of the base 1, distributed on both sides of the V-shaped rocker arm 3, to support the rocker arm on the same side of the V-shaped rocker arm 3. The V-shaped rocker arm 3 naturally tilts against the supporting short legs 2 in a 90° V-shape, adapting to the support requirements of pipes of different diameters. A circular main frame is provided within the V-shaped area of ​​the V-shaped rocker arm 3, contacting its inner wall and used to fit with the pipe 10 to be welded. A hydraulic support arm 4 is provided on the base 1, located outside the supporting short legs 2 and contacting the outer wall of the V-shaped rocker arm 3 on the same side. The horizontal state and axial position of the pipe 10 to be welded are coarsely adjusted by the hydraulic support arm 4. Multiple radial adjustment mechanisms 8 are evenly distributed around the circumference of the circular main frame for fine-tuning the pipe's alignment. In the above structure, multiple radial adjustment mechanisms 8 are evenly distributed around the circumference within the V-shaped area of ​​the V-shaped rocker arm 3 hinged in the middle of the base 1. The circular main frame of mechanism 8, with two supporting short legs 2 and hydraulic support arms 4 on the base 1, provides low-position support and angle adjustment support for the V-shaped rocker arm 3. This allows for the adjustment of the horizontal state and axial position of the pipe 10 to be welded, which is fixed by the circular main frame. This solves the problems of poor welding quality, low construction efficiency, and high labor costs caused by poor adaptability, low alignment accuracy, weak anti-deformation effect, and complex operation in the on-site butt welding of large-diameter gas pipelines. It enables rapid and accurate alignment of the axial center of the two pipe sections, effectively suppresses welding thermal deformation, improves welding quality and construction efficiency, has a reasonable structure, is easy to operate, has strong adaptability, reduces reliance on manpower, and has high work safety.

[0020] The specific structure of the annular main frame is as follows: The annular main frame includes two C-shaped ring main frames, namely, C-shaped ring main frame 1 6 and C-shaped ring main frame 2 5, which are identical in structure and symmetrically distributed. The two ends of C-shaped ring main frame 1 6 and C-shaped ring main frame 2 5 are detachably and fixedly connected as one unit by a quick locking device 9. Specifically, C-shaped ring main frame 1 6 includes two parallel C-shaped rings 6-1. Multiple connecting blocks 7, which are fixedly connected to the inner walls of the corresponding side rings, are evenly distributed between the two C-shaped rings 6-1 to improve the overall rigidity of the frame. A radial adjustment mechanism 8 is provided on the connecting blocks 7. The annular main frame is composed of the C-shaped ring main frame 1 6 and C-shaped ring main frame 2 5 with a matching ring structure. A welding gap for pipe welding is left between the two C-shaped rings 6-1 to ensure the smooth progress of welding operations under the premise of reliable and stable support for the pipe.

[0021] The specific structure of the quick-locking device 9 is as follows: the quick-locking device 9 is a locking bolt, the C-ring 6-1 has a connecting hole at the end of the butt joint, and the quick-locking device 9 passes through the connecting holes at the corresponding ends of the four C-rings 6-1 in the C-ring main frame 1 6 and the C-ring main frame 2 5 in sequence and is adapted to the locking nut for quick assembly and disassembly. like Figure 1-4 As shown, the specific structure of the radial adjustment mechanism 8 is as follows: The radial adjustment mechanism 8 includes a force transmission screw 8-1, an adjustment handle 8-2, and a clamping block 8-3. The force transmission screw 8-1 is radially distributed along the annular main frame, and the annular main frame contacts the V-shaped rocker arm 3, such that the V-shaped rocker arm 3 is located between the two force transmission screws 8-1 that are threaded onto the connecting block 7. That is, the distance between the two C-shaped rings 6-1 is greater than the width of the V-shaped rocker arm 3. In this way, after the outer wall of the C-shaped ring 6-1 contacts the V-shaped rocker arm 3, the two force transmission screws 8-1 that are threaded onto the connecting block 7 are located outside the V-shaped rocker arm 3, ensuring support for the annular main frame without affecting the rotational adjustment of the force transmission screw 8-1. The adjustment handle 8-2 is fixed to the force transmission screw. The outer end of the force transmission screw 8-1 is connected to the inner end of the force transmission screw 8-1, and the adjusting handle 8-2 is used to rotate the force transmission screw 8-1, so that the adjusting block 8-3 can tighten and fine-tune the pipe 10 to be welded. The adjusting handle 8-2 is fixed to the outer end of the force transmission screw 8-1 (i.e., the upper end in the figure) for easy manual operation. The adjusting block 8-3 is connected to the inner end of the force transmission screw 8-1 (i.e., the lower end in the figure), and its end face in contact with the pipe 10 to be welded is provided with an anti-slip pad, which can increase the friction with the outer wall of the pipe, prevent the pipe from sliding during the adjustment process, and prevent the outer wall of the pipe from being scratched. By rotating the adjusting handle 8-2, the force transmission screw 8-1 can be driven to move radially, which can drive the adjusting block 8-3 to tighten or loosen the pipe, so as to achieve precise fine-tuning of the pipe axis.

[0022] A laser alignment instrument for projecting a reference line is installed at the center of the top of the annular main frame. The laser alignment instrument can be installed centered on the connecting block 7. The annular main frame can be adjusted so that the laser alignment instrument is at the top. The laser alignment instrument can visually display the axial position of the pipe 10 to be welded, helping the operator to judge whether the axial centers of the two pipe sections coincide, thus improving alignment accuracy and efficiency.

[0023] The hydraulic support arm 4 is as follows: The hydraulic support arm 4 is a vertically arranged hydraulic cylinder, and the telescopic arm end of the hydraulic cylinder is equipped with a pulley that contacts the outer wall of the V-shaped rocker arm 3 on the corresponding side; the lower end of the hydraulic cylinder is welded and fixed to the long channel steel of the base 1, and the upper telescopic arm end is equipped with a pulley that slides in contact with the outer wall of the rocker arm on the same side as the V-shaped rocker arm 3; the tilt angle of the V-shaped rocker arm 3 can be roughly adjusted by the hydraulic cylinder, thereby adjusting the horizontal state and axial position of the pipe 10 to be welded, and overcoming the influence of uneven site on construction.

[0024] Tooling assembly: 1) Base 1 installation: Place base 1 on a flat area of ​​the construction site to ensure that base 1 is in stable contact with the ground; if the site is not flat, base 1 can be initially leveled by adjusting the surrounding auxiliary blocks. 2) Assembly of V-shaped rocker arm 3 and hydraulic support arm 4: Install V-shaped rocker arm 3 into the groove in the middle of base 1 through universal joint, so that it is naturally tilted against the short support foot 2 in a 90° V shape; then weld and fix the lower end of hydraulic support arm 4 to the long channel steel of base 1, ensuring that its upper pulley slides in contact with the outer wall of V-shaped rocker arm 3, and check whether hydraulic support arm 4 is working properly; 3) Assembly of the circular main frame: Align the connecting holes at the corresponding ends of the C-shaped ring 6-1 of the C-shaped ring main frame 1 and the C-shaped ring 6-1 of the C-shaped ring main frame 2 5, pass the locking bolt of the quick locking device 9 through the connecting hole, and connect it with the locking nut. After tightening the nut, a complete circular main frame is formed. At the same time, confirm that the welding gap in the middle of the circular main frame meets the construction requirements, install the laser alignment instrument and adjust it to ensure that it can project the reference line normally. 4) Inspection of radial adjustment mechanism 8: Rotate the adjustment handle 8-2 of each group of radial adjustment mechanism 8 to confirm that the force transmission screw 8-1 moves smoothly and that the anti-slip pad of the clamping block 8-3 is undamaged, and ensure that the adjustment function is normal.

[0025] Installation and alignment of the pipe 10 to be welded: 1) Multiple tooling arrangement: Based on the length of the two sections of pipe 10 to be welded, three sets of tooling are evenly set below the pipe 10 to be welded (usually one set at each end of the pipe and one set at the joint) to ensure stable pipe support; 2) Pipe hoisting: Set the circular main frame with the corresponding section of pipe 10 to be welded. Use hoisting equipment to slowly place the pipe 10 to be welded into the V-shaped area of ​​the V-shaped rocker arm 3 of the three sets of tooling, and make the circular main frame contact the corresponding V-shaped rocker arm 3. Initially adjust the position of the pipe 10 to be welded so that the docking port is aligned with the welding gap of the circular main frame, and connect the circular main frame at the docking position to the two sections of pipe 10 to be welded. 3) Coarse adjustment of level and axis: Start the hydraulic support arm 4 to control the extension and retraction of the telescopic arm, adjust the tilt angle of the V-shaped rocker arm 3, and then coarsely adjust the level of the pipe 10 to be welded; at the same time, observe the baseline projected by the laser alignment instrument, and initially adjust the axis position of the pipe 10 to be welded so that the axes of the two pipes roughly coincide. 4) Precise alignment: Turn on the laser alignment instrument and the operator observes the deviation between the baseline and the axis of the pipe to be welded 10; rotate the adjustment handles 8-2 of the eight radial adjustment mechanisms 8 on the annular main frame synchronously or individually, and push the clamping block 8-3 to clamp the pipe through the force transmission screw 8-1, and fine-tune the position of the pipe; adjust repeatedly until the laser alignment instrument shows that the axes of the two pipe sections are completely aligned, stop the adjustment and lock the adjustment handles 8-2.

[0026] Welding operations and tooling removal: 1) Welding process monitoring: After the welding operation begins, a dedicated person is assigned to observe the deformation at the pipe joint. If slight deformation occurs due to welding thermal stress, it can be finely adjusted in real time by rotating the adjustment handle 8-2 of the radial adjustment mechanism 8 to ensure that the pipe axis is always aligned during the welding process. 2) Tooling removal: After the welding operation is completed and the weld has cooled to room temperature, first loosen all the adjusting handles 8-2 of the radial adjustment mechanism 8 to separate the clamping block 8-3 from the outer wall of the pipe; then unscrew the locking nut of the quick locking device 9, and disassemble the C-ring main frame 1 6 and C-ring main frame 2 5; finally close the hydraulic support arm 4, and slowly move the pipe away from the V-shaped rocker arm 3 to complete the tooling removal. The tooling can be transferred to the next construction site for reuse.

[0027] The overall structure of this technical solution is simple, allowing one person to complete the main operations of tooling assembly, pipeline adjustment, and welding assistance, reducing reliance on multiple people and lowering labor costs. The anti-slip pads on the contact surface between the clamping block 8-3 and the pipeline, and the pulley design of the hydraulic support arm 4, ensure operational stability and prevent damage to equipment and pipelines, thereby improving construction safety.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A deformation-resistant tooling fixture for welding large-diameter pipes, characterized in that: The device includes a base (1) and a V-shaped rocker arm (3) with its lower end hinged in the groove in the middle of the base (1). The upper end of the base (1) is symmetrically fixed with short support feet (2) distributed on both sides of the V-shaped rocker arm (3) and used to support the rocker arm on the same side of the V-shaped rocker arm (3). The V-shaped area of ​​the V-shaped rocker arm (3) is provided with an annular main frame that contacts its inner wall and is used to fit with the pipe (10) to be welded. The base (1) is provided with a hydraulic support arm (4) located outside the support feet (2) and in contact with the outer wall on the same side of the V-shaped rocker arm (3). The horizontal state and axial position of the pipe (10) to be welded are coarsely adjusted by the hydraulic support arm (4). The annular main frame is evenly distributed with multiple radial adjustment mechanisms (8) for fine adjustment of the pipe centering position.

2. The anti-deformation tooling fixture for welding large-diameter pipes according to claim 1, characterized in that: The circular main frame includes a C-shaped ring main frame one (6) and a C-shaped ring main frame two (5) with the same structure and symmetrical distribution. The two ends of the C-shaped ring main frame one (6) and the C-shaped ring main frame two (5) are detachably and fixed together by a quick locking device (9).

3. The anti-deformation tooling fixture for welding large-diameter pipes according to claim 2, characterized in that: The C-shaped ring main frame (6) includes two parallel C-shaped rings (6-1), and multiple connecting blocks (7) that are fixedly connected to the inner wall of the corresponding side ring are evenly distributed between the two C-shaped rings (6-1), and a radial adjustment mechanism (8) is provided on the connecting block (7).

4. The anti-deformation tooling fixture for welding large-diameter pipes according to claim 3, characterized in that: The quick-locking device (9) is a locking bolt. The C-ring (6-1) has a connecting hole at the end of the connecting position. The quick-locking device (9) passes through the connecting holes at the corresponding ends of the four C-rings (6-1) in the first (6) and second (5) main frames of the C-rings in sequence and is adapted to the locking nut for connection.

5. The anti-deformation tooling fixture for welding large-diameter pipes according to claim 3, characterized in that: The radial adjustment mechanism (8) includes a power transmission screw (8-1), an adjustment handle (8-2), and a clamping block (8-3). The two power transmission screws (8-1) are radially distributed along the annular main frame, and the annular main frame contacts the V-shaped rocker arm (3) so that the V-shaped rocker arm (3) is located between the two power transmission screws (8-1) that are threaded to the connecting block (7). The adjustment handle (8-2) is fixed to the outer end of the power transmission screw (8-1), and the clamping block (8-3) is connected to the inner end of the power transmission screw (8-1). The adjustment handle (8-2) rotates the power transmission screw (8-1) so that the clamping block (8-3) clamps and fine-tunes the pipe (10) to be welded.

6. The anti-deformation tool-type fixture for welding large-diameter pipes according to claim 5, characterized in that: The end face of the clamping block (8-3) that contacts the pipe (10) to be welded is provided with an anti-slip pad.

7. The anti-deformation tooling fixture for welding large-diameter pipes according to claim 1, characterized in that: A laser alignment instrument for projecting reference lines is installed at the center of the top of the circular main frame.

8. The anti-deformation tooling fixture for welding large-diameter pipes according to claim 1, characterized in that: The hydraulic support arm (4) is a vertically arranged hydraulic cylinder, and the telescopic arm end of the hydraulic cylinder is equipped with a pulley that contacts the outer wall of the corresponding side of the V-shaped rocker arm (3).

9. The anti-deformation tooling fixture for welding large-diameter pipes according to any one of claims 1-8, characterized in that: The base (1) is an H-shaped base welded from channel steel.

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