A petrochemical pipeline welding device

Abstract

The utility model provides a kind of petrochemical chemical pipeline welding device. To solve the technical problems such as the wind blocking operation when pipeline welding is difficult to realize, and the installation and removal are not convenient when wind shield is not used. The technical scheme of the utility model includes vehicle plate frame, wind-preventing mechanism, clamping mechanism;The wind-preventing mechanism includes wind shield and hinged lifting frame, the clamping mechanism includes clamping pipe and clamping rod, the clamping auxiliary mechanism includes outer swivel ring and outer fixed ring, through the combination design of wind shield and hinged lifting frame, effectively block external wind power, provide stable windproof environment for welding area, hinged lifting frame is provided with balanced support in pairs, ensure structural stability, roller shaft design supports pipe material and allows it to rotate, facilitate all-round welding operation, the combination design of clamping pipe and clamping rod is used in the installation clamping mechanism, realize the function of quick installation and disassembly, the rotation design of outer extension rod and rotating rod cooperates the thrust of outer extension spring, so that clamping rod can be automatically locked after inserting clamping pipe, without manual intervention.

Description

Technical Field

[0001] This utility model relates to the field of pipeline welding technology, specifically to a petrochemical pipeline welding device. Background Technology

[0002] Currently, existing petrochemical pipeline welding equipment still has certain shortcomings in use, especially in terms of adaptability to external environmental factors during pipe welding and the ease of installation and disassembly of auxiliary equipment.

[0003] Specifically, in the petrochemical industry, pipeline welding often needs to be carried out outdoors or in a semi-enclosed environment, which is greatly affected by natural environmental conditions. When encountering unpredictable wind direction or strong winds, the welding area is easily affected by airflow, and the stability of the welding flame or shielding gas is damaged, resulting in a decline in weld formation quality, such as weld porosity, slag inclusion, or weak welds, which seriously affect the safety and service life of the pipeline.

[0004] In addition, windbreaks also present inconveniences in actual use, such as difficulty in installation and disassembly. Most existing designs use bolt fixing or rigid connection, which requires multiple steps during installation and usually requires the use of special tools, increasing the complexity and time cost of the operation. When the windbreak is not in use or needs to be replaced, the disassembly process is equally cumbersome. Especially in outdoor construction environments, the difficulty in disassembly and assembly not only increases the labor intensity of operators, but may also lead to safety hazards due to the inconvenience of operation. Utility Model Content

[0005] In view of this, the present invention provides a petrochemical pipeline welding device to solve the technical problems mentioned in the background art, such as the difficulty in achieving windproof operation during pipeline welding and the inconvenience of installation and disassembly when not using a windproof frame or changing different windproof frames.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a petrochemical pipeline welding device, including a vehicle frame, wherein an n-shaped windbreak frame and several pipeline support frames are sequentially arranged along the axial direction on the upper surface of the vehicle frame; the bottom sides of the windbreak frame are connected to the vehicle frame through a snap-fit ​​mechanism. The aforementioned snap-fit ​​mechanism includes a snap-fit ​​tube and a snap-fit ​​rod. The snap-fit ​​rod is fixed to the vehicle frame, and the snap-fit ​​tube is fixed to the mounting plate. The mounting plate is vertically set at the bottom of the side wall of the windshield frame. Several avoidance grooves are provided on the circumference of the snap-fit ​​tube. The snap-fit ​​rod is provided with an extension rod corresponding to the avoidance groove, and the extension rod can extend and retract within the avoidance groove.

[0007] Furthermore, an outer rotating ring and an outer fixed ring are also provided on the circumference of the clamping tube. The outer rotating ring is limited to rotate on the outer wall of the clamping tube, and the outer fixed ring is fixed on the outer wall of the clamping tube. A pair of shrinking blocks are slidably installed at the top end of the outer fixed ring, and the pair of shrinking blocks are arranged in multiple pairs. A shrinking spring is provided between the opposite pair of shrinking blocks. A rotating ball block is provided at the bottom of the outer rotating ring, and the rotating ball block passes through different pairs of shrinking blocks in sequence to make the outer rotating ring rotate stably.

[0008] Furthermore, the circumference of the snap-fit ​​rod is provided with several grooves corresponding to the avoidance groove. The extension rod is hinged to the upper part of the groove, and a rotating rod is hinged to the lower part of the groove. An extension spring is provided inside the extension rod. One end of the extension spring is fixed inside the extension rod, and the other end is hinged to the rotating rod. The extension spring pushes the rotating rod to rotate, so that one end of the extension rod extends out of the wall groove.

[0009] Furthermore, a directional block is longitudinally slidably installed on the outer wall of the card tube, and a slope plate is installed on the top of the outer rotating ring. The rotation of the slope plate causes the directional block to move longitudinally, thereby fixing the protruding rod that extends out of the wall slot.

[0010] Furthermore, the structure of the pipe support frame includes a bidirectional screw assembly. A pair of X-shaped hinge frames are provided on the upper part of the bidirectional screw assembly. The bottom opposite rods of the pair of hinge frames are connected by support rods, and the middle intersection is hinged by a shaft. The top opposite rods are connected by rollers, and rollers are provided on the rollers. The pipe is placed between the two rollers. The bidirectional screw assembly pushes the angle of the pair of X-shaped hinge frames to increase or decrease.

[0011] Furthermore, an unlocking sleeve is longitudinally slidably provided on the outer wall of the card tube. The unlocking sleeve slides down and presses down on the extension rod, causing the extension rod and the rotating rod to rotate and retract into the groove.

[0012] Furthermore, a limit block is provided at one end of the locking rod, and the other end of the locking rod extends through the vehicle frame and mounting plate to engage with the locking tube.

[0013] Furthermore, the contact surfaces of the directional block and the slope plate are both inclined surfaces, and they cooperate with each other.

[0014] Furthermore, the three sides of the n-shaped windshield are inclined inwards respectively.

[0015] Furthermore, the groove is avoided as it is a vertical strip.

[0016] Compared with the prior art, the advantages of this utility model are as follows: 1) This utility model is equipped with a windproof mechanism. Through the combined design of the windbreak frame and the hinge frame, it effectively blocks part of the external wind force, providing a stable windproof environment for the welding area. The multiple sets of hinge frames in pairs provide balanced support to ensure structural stability. The roller design supports the pipe and allows it to rotate, facilitating all-round welding operations. The longitudinal groove design on the windbreak frame allows the end of the pipe to slide freely in it, increasing operational flexibility. The cooperation between the bidirectional screw assembly and the hinge frame enables precise height adjustment, allowing the device to adapt to the welding needs of pipes with different diameters and heights. The rotation of the carriage frame allows the windbreak frame to appropriately block the wind direction, facilitating welding in the longitudinal groove of the pipe.

[0017] 2) This utility model is equipped with an installation snap-fit ​​mechanism. The snap-fit ​​mechanism adopts a combination design of snap-fit ​​tube and snap-fit ​​rod, which realizes the function of quick installation and disassembly. The rotation design of the extension rod and the rotating rod, together with the thrust of the extension spring, allows the snap-fit ​​rod to be easily locked after being inserted into the snap-fit ​​tube without much manual intervention.

[0018] 3) The grooved wall of this utility model provides an extension space for the extension rod, forming a stable locking point. The limiting block on the snap-fit ​​rod prevents over-insertion, while the groove design ensures that the movement trajectory of the extension rod and the rotating rod is controllable, which greatly simplifies the installation and disassembly process and improves work efficiency.

[0019] 4) This utility model uses an outer rotating ring and an outer fixed ring to form a snap-fit ​​auxiliary mechanism. The cooperation between the outer rotating ring and the outer fixed ring provides additional stability and safety for the installation of the snap-fit ​​mechanism. The multiple symmetrical arrangements of the shrinking blocks and the shrinking springs provide balanced force and adaptive adjustment capabilities. The rotating ball block passes between different shrinking blocks, ensuring that the outer rotating ring rotates smoothly and controllably.

[0020] 5) The combination design of the slope plate and the directional block of this utility model provides a secondary locking function, which further enhances the stability of the connection. The unlocking sleeve design realizes a one-step unlocking operation, making the device disassembly simple and quick, facilitating the replacement of different models of windshields, applicable to different models of pipes, or easy to disassemble when the windshield is not used. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the device in the unused state of this utility model; Figure 2 This is a schematic diagram of the overall structure of the device from the bottom view of this utility model; Figure 3 This is a structural diagram of the windproof frame installation method in this utility model; Figure 4 This is a schematic diagram of the mounting and snapping mechanism in this utility model; Figure 5 for Figure 4 Internal cross-sectional view.

[0022] In the diagram: 1. Car frame; 2. Windshield frame; 3. Hinge frame; 4. Roller; 5. Longitudinal groove of pipe; 6. Snap-fit ​​pipe; 7. Snap-fit ​​rod; 8. Wall slot; 9. Outer extension rod; 10. Rotating rod; 11. Outer extension spring; 12. Outer rotating ring; 13. Outer fixing ring; 14. Reduction block; 15. Reduction spring; 16. Rotating ball block; 17. Two-way lead screw assembly; 18. Mounting plate; 19. Limiting block; 20. Orienting block; 21. Slope rotating plate; 22. Groove; 23. Unlocking sleeve. Detailed Implementation

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figures 1-5 This embodiment provides a petrochemical pipeline welding device, including a vehicle frame 1. The upper surface of the vehicle frame 1 is provided with an n-shaped windbreak frame 2 and a number of pipe support frames arranged sequentially along the axial direction. The bottom sides of the windbreak frame 2 are connected to the vehicle frame 1 through a snap-fit ​​mechanism. The bottom of the vehicle frame 1 is provided with moving wheels to facilitate the movement of this utility model structure. The pipe is mounted on the pipe support frame and can move along the n-shaped windbreak frame 2.

[0026] like Figure 1 As shown, the pipe support frames are evenly distributed, and each has the same structure. Specifically, the structure includes a bidirectional screw assembly 17. A pair of X-shaped hinged frames 3 are mounted on the upper part of the bidirectional screw assembly 17. The bottom opposite rods of the pair of hinged frames 3 are connected by support rods, and the middle intersection is hinged by a shaft. The top opposite rods are connected by rollers 4, and rollers are mounted on the rollers 4. The pipe is supported between the two rollers and can slide along the rollers for welding, while being protected by the windbreak frame 2. The bidirectional screw assembly 17 pushes the pair of X-shaped hinged frames 3 to increase or decrease the angle. The bidirectional screw assembly 17 includes a U-shaped plate, with screws mounted on opposite sides of the U-shaped plate. The two screws are driven by motors. Figure 1For illustrative purposes only, one motor is shown. The other ends of the two lead screws are connected to the bottom support rod of the hinge frame 3. The motor drives the lead screws to move the bottom support rod, thereby realizing the angle adjustment of the X-shaped hinge frame 3.

[0027] like Figure 4 and Figure 5 As shown, the snap-fit ​​mechanism includes a snap-fit ​​tube 6 and a snap-fit ​​rod 7. The snap-fit ​​rod 7 and the snap-fit ​​tube 6 are the main components of the snap-fit ​​mechanism, enabling the installation and removal of the windshield frame 2. The snap-fit ​​rod 7 is fixed to the vehicle frame 1, and the snap-fit ​​tube 6 is fixed to the mounting plate 18. The mounting plate 18 is vertically set at the bottom of the side wall of the windshield frame 2. Several vertical strip-shaped clearance grooves 8 are provided on the circumference of the snap-fit ​​tube 6. The snap-fit ​​rod 7 is provided with an extension rod 9 corresponding to the clearance groove 8. The extension rod 9 can extend and retract within the clearance groove 8. The extension rod 9 and the rotating rod 10 on the outer wall of the snap-fit ​​rod 7 are rotatable. The rotating rod 10 slides within the extension rod 9, and the extension spring 11 provides the thrust. When the snap-fit ​​rod 7 is inserted into the snap-fit ​​tube 6, the extension spring 11 pushes the rotating rod 10 to rotate. The rotation causes one end of the extension rod 9 to extend out of the groove 8 on the wall of the snap-fit ​​tube 6. The extension rod 9 extends out to form a mechanical lock, preventing the snap-fit ​​rod 7 from disengaging.

[0028] In this embodiment, an outer rotating ring 12 and an outer fixed ring 13 are also provided on the circumference of the retaining tube 6. The outer rotating ring 12 is rotatably limited on the outer wall of the retaining tube 6, and the outer fixed ring 13 is fixedly provided on the outer wall of the retaining tube 6. The top end of the outer fixed ring 13 is slidably mounted with a pair of shrinking blocks 14, and the pair of shrinking blocks 14 are arranged in multiple pairs. A shrinking spring 15 is provided between the opposite pair of shrinking blocks 14. A rotating ball block 16 is provided at the bottom of the outer rotating ring 12, and the rotating ball block 16 passes through different pairs of shrinking blocks 14 in sequence, so that the outer rotating ring 12 rotates stably.

[0029] In this embodiment, a directional block 20 is longitudinally slidably disposed on the outer wall of the clamping pipe 6, and a slope rotating plate 21 is disposed on the top of the outer rotating ring 12. The rotation of the slope rotating plate 21 causes the directional block 20 to move longitudinally, so that the directional block 20 fixes the protruding rod 9 protruding from the wall slot 8. The contact surfaces of the directional block 20 and the slope rotating plate 21 are both inclined surfaces and cooperate with each other.

[0030] In this embodiment, an unlocking sleeve 23 is longitudinally slidably provided on the outer wall of the card tube 6. The unlocking sleeve 23 slides down and presses down the extension rod 9, causing the extension rod 9 and the rotating rod 10 to rotate and retract into the groove 22.

[0031] The outer rotating ring 12 is limited to rotating and installed on the outer wall of the clamping tube 6. The outer fixed ring 13 is fixed to the outer wall of the clamping tube 6. Multiple sets of paired contraction blocks 14 are installed on the top. Paired contraction springs 15 are installed between the paired contraction blocks 14 to provide centripetal force. The rotating ball block 16 at the bottom of the outer rotating ring 12 passes between different paired contraction blocks 14. The rotating ball block 16 moves between the paired contraction blocks 14 to make the outer rotating ring 12 rotate stably. The slope plate 21 at the top of the outer rotating ring 12 rotates and pushes the directional block 20 to move longitudinally. The directional block 20 moves to the position of the outward extension rod 9 and further fixes it.

[0032] In this embodiment, the circumference of the snap-fit ​​rod 7 is provided with a plurality of grooves 22 corresponding to the avoidance groove 8. The extension rod 9 is hinged to the upper part of the groove 22, and the lower part of the groove 22 is hinged to the rotating rod 10. An extension spring 11 is provided inside the extension rod 9. One end of the extension spring 11 is fixed to the extension rod 9, and the other end is hinged to the rotating rod 10. The extension spring 11 pushes the rotating rod 10 to rotate, so that one end of the extension rod 9 extends out of the wall groove 8.

[0033] In this embodiment, a limiting block 19 is provided at one end of the locking rod 7, and the other end of the locking rod 7 extends through the vehicle frame 1 and the mounting plate 18 to engage with the locking tube 6.

[0034] In this embodiment, the three sides of the n-shaped windbreak 2 are inclined inward.

[0035] Please see Figures 1-5 As a supplementary embodiment of a windproof device for welding petrochemical pipelines, including a windproof mechanism, a mounting clamping mechanism, and a clamping auxiliary mechanism: A bidirectional screw assembly 17 is installed at the top end of the vehicle frame 1, and a pair of hinged lifting frames 3 are threadedly driven by the bidirectional screw assembly 17. An mounting plate 18 is installed at the bottom end of the side wall of the windbreak frame 2, and a clamping pipe 6 is fixedly installed on the mounting plate 18. A limiting block 19 is installed at one end of the clamping rod 7, and one end of the clamping rod 7 extends through the vehicle frame 1 and the mounting plate 18 to engage with the clamping pipe 6. A directional block 20 is longitudinally slidably installed on the outer wall of the pipe 6. A slope plate 21 is installed at the top end of the outer rotating ring 12. The rotation of the slope plate 21 causes the directional block 20 to move longitudinally, so that the directional block 20 fixes the protruding rod 9 extending out of the wall slot 8. A groove 22 is opened on the outer wall of the snap-fit ​​rod 7, and the protruding rod 9 and the rotating rod 10 are rotatably set in the groove 22. An unlocking sleeve 23 is longitudinally slidably installed on the outer wall of the snap-fit ​​pipe 6, and the inner wall of the unlocking sleeve 23 presses against the side of the protruding rod 9, so that the protruding rod 9 and the rotating rod 10 rotate into the groove 22.

[0036] More specifically, the car frame 1 is placed in the welding work area. The wind deflector 2 is connected to the clamping tube 6 via the mounting plate 18. The clamping rod 7 extends through the car frame 1 and the mounting plate 18 and is inserted into the clamping tube 6. After the clamping rod 7 is inserted, the outward extension rod 9 automatically extends out of the wall slot 8 to form a lock. The outer rotating ring 12 is rotated so that the slope rotating plate 21 pushes the directional block 20 to fix the outward extension rod 9. The height and angle of the hinge frame 3 are adjusted by the bidirectional screw assembly 17. The pipe to be welded is placed on the roller 4. One end of the pipe can slide in the longitudinal groove 5 of the wind deflector 2. The wind deflector 2 blocks the wind force and protects the welding area. The roller 4 allows the pipe to rotate, which is convenient for all-round welding. The sliding unlocking sleeve 23 is slidable. The inner wall of the unlocking sleeve 23 presses against the side of the outward extension rod 9. The outward extension rod 9 and the rotating rod 10 are pressed back into the groove 22. The locking relationship between the clamping rod 7 and the clamping tube 6 is released, and the wind deflector 2 can be removed.

[0037] In summary, when the overall equipment is in use or operation: when the windproof mechanism needs to be activated, a two-way screw assembly 17 is installed on the top of the car frame 1, and the hinged frames 3 are arranged in pairs on the car frame 1. When the two-way screw assembly 17 rotates, it pushes the hinged frames 3 to move through the thread. A pair of rollers 4 are installed at one end of the hinged frames 3 to support the pipe. The longitudinal groove 5 opened on the windproof frame 2 allows the end of the pipe to slide in it. After the pipe is placed on the roller 4, it can slide along the longitudinal groove 5 for welding, while being protected by the windproof frame 2.

[0038] When the snap-fit ​​mechanism is installed, the snap-fit ​​rod 7 and the snap-fit ​​tube 6 constitute the main connecting components to realize the installation and disassembly of the windshield frame 2. The extension rod 9 and the rotating rod 10 on the outer wall of the snap-fit ​​rod 7 are rotatable. The rotating rod 10 slides in the extension rod 9 and is pushed by the extension spring 11. When the snap-fit ​​rod 7 is inserted into the snap-fit ​​tube 6, the extension spring 11 pushes the rotating rod 10 to rotate. The rotation causes one end of the extension rod 9 to extend out of the slot 8 in the wall of the snap-fit ​​tube 6. The extension rod 9 extends out to form a mechanical lock to prevent the snap-fit ​​rod 7 from disengaging.

[0039] When the locking auxiliary mechanism is in operation, the outer rotating ring 12 is limited to rotate and installed on the outer wall of the locking tube 6, the outer fixing ring 13 is fixed to the outer wall of the locking tube 6, and multiple sets of counterweight blocks 14 are installed on the top. Counterweight springs 15 are installed between the counterweight blocks 14 to provide centripetal force. The rotating ball block 16 at the bottom of the outer rotating ring 12 passes between different counterweight blocks 14. The rotating ball block 16 moves between the counterweight blocks 14 to make the outer rotating ring 12 rotate stably. The slope plate 21 at the top of the outer rotating ring 12 rotates and pushes the directional block 20 to move longitudinally. The directional block 20 moves to the position of the outward extension rod 9 and further fixes it.

[0040] Place the car frame 1 in the welding work area. The wind deflector 2 is connected to the clamping tube 6 via the mounting plate 18. The clamping rod 7 extends through the car frame 1 and the mounting plate 18 and is inserted into the clamping tube 6. After the clamping rod 7 is inserted, the outward extension rod 9 automatically extends out of the wall slot 8 to form a lock. Rotate the outer rotating ring 12 to make the slope rotating plate 21 push the directional block 20 to fix the outward extension rod 9. Adjust the height and angle of the hinge frame 3 through the bidirectional screw assembly 17. Place the pipe to be welded on the roller 4. One end of the pipe can slide in the longitudinal groove 5 of the wind deflector 2. The wind deflector 2 blocks the wind force and protects the welding area. The roller 4 allows the pipe to rotate, which is convenient for all-round welding. Slide the unlocking sleeve 23. The inner wall of the unlocking sleeve 23 presses against the side of the outward extension rod 9. The outward extension rod 9 and the rotating rod 10 are pressed back into the groove 22. The locking relationship between the clamping rod 7 and the clamping tube 6 is released, and the wind deflector 2 can be removed.

[0041] Many specific details have been set forth in the foregoing description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed above.

[0042] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A petrochemical pipeline welding device, comprising a chassis frame (1), characterized in that... The upper surface of the vehicle frame (1) is provided with an n-shaped windbreak frame (2) and several pipe support frames in sequence along the axial direction; the bottom sides of the windbreak frame (2) are connected to the vehicle frame (1) through a snap-fit ​​mechanism. The snap-fit ​​mechanism includes a snap-fit ​​tube (6) and a snap-fit ​​rod (7). The snap-fit ​​rod (7) is fixed on the vehicle frame (1), and the snap-fit ​​tube (6) is fixed on the mounting plate (18). The mounting plate (18) is vertically set at the bottom of the side wall of the windshield frame (2). Several wall slots (8) are provided on the circumference of the snap-fit ​​tube (6). The snap-fit ​​rod (7) is provided with an extension rod (9) corresponding to the wall slot (8), and the extension rod (9) can extend and retract within the wall slot (8).

2. The petrochemical pipeline welding device according to claim 1, characterized in that, The outer rotating ring (12) and the outer fixed ring (13) are also provided on the circumference of the clamping pipe (6). The outer rotating ring (12) is limited to rotating on the outer wall of the clamping pipe (6), and the outer fixed ring (13) is fixed on the outer wall of the clamping pipe (6). The top end of the outer fixed ring (13) is slidably mounted with a pair of shrinking blocks (14), and the pair of shrinking blocks (14) are arranged in pairs. A pair of shrinking springs (15) are provided between the opposite pair of shrinking blocks (14). A rotating ball block (16) is provided at the bottom of the outer rotating ring (12), and the rotating ball block (16) passes through different pairs of shrinking blocks (14) in sequence, so that the outer rotating ring (12) rotates stably.

3. A petrochemical pipeline welding device according to claim 1 or 2, characterized in that, The circumference of the snap rod (7) is provided with a number of grooves (22) corresponding to the wall slot (8). The extension rod (9) is hinged to the upper part of the groove (22). The lower part of the groove (22) is hinged to the rotating rod (10). An extension spring (11) is provided inside the extension rod (9). One end of the extension spring (11) is fixed inside the extension rod (9), and the other end is hinged to the rotating rod (10). The extension spring (11) pushes the rotating rod (10) to rotate, so that one end of the extension rod (9) extends out of the wall slot (8).

4. The petrochemical pipeline welding device according to claim 3, characterized in that, A directional block (20) is longitudinally slidably arranged on the outer wall of the card tube (6), and a slope plate (21) is arranged on the top of the outer rotating ring (12). The rotation of the slope plate (21) causes the directional block (20) to move longitudinally, so that the directional block (20) fixes the outward extension rod (9) of the wall slot (8).

5. A petrochemical pipeline welding device according to claim 4, characterized in that, The structure of the pipe support frame includes a two-way screw assembly (17). A pair of X-shaped hinge frames (3) are provided on the upper part of the two-way screw assembly (17). The bottom opposite rods of the pair of hinge frames (3) are connected by support rods, and the middle cross position is hinged by a shaft. The top opposite rods are connected by rollers (4). Rollers are provided on the rollers (4). The pipe is placed between the two rollers. The two-way screw assembly (17) pushes the angle of the pair of X-shaped hinge frames (3) to increase or decrease.

6. The petrochemical pipeline welding device according to claim 5, characterized in that, An unlocking sleeve (23) is longitudinally slidably provided on the outer wall of the card tube (6). The unlocking sleeve (23) slides down and presses down the extension rod (9), causing the extension rod (9) and the rotating rod (10) to rotate and retract into the groove (22).

7. A petrochemical pipeline welding device according to claim 6, characterized in that, One end of the snap-fit ​​rod (7) is provided with a limit block (19), and the other end of the snap-fit ​​rod (7) extends through the vehicle frame (1) and the mounting plate (18) to engage with the snap-fit ​​tube (6).

8. A petrochemical pipeline welding device according to claim 7, characterized in that, The contact surfaces of the directional block (20) and the slope plate (21) are both inclined surfaces and cooperate with each other.

9. A petrochemical pipeline welding device according to claim 8, characterized in that, The three sides of the n-shaped windbreak (2) are inclined inward respectively.

10. A petrochemical pipeline welding device according to claim 9, characterized in that, The wall groove (8) is a vertical strip.

Images