Welding device
By designing a welding device with an adaptive internal support mechanism and a moving mechanism, the welding problem of pipes of different specifications was solved, achieving efficient and stable welding results and improving the convenience and versatility of the device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- PIPECHINA SOUTH CHINA CO
- Filing Date
- 2025-05-13
- Publication Date
- 2026-05-05
AI Technical Summary
Existing welding equipment is difficult to adapt to pipes of different specifications, resulting in problems such as weak welds and deformation, which limits the widespread application of the equipment and increases construction costs.
A welding device comprising a base frame, mounting base, welding head, moving mechanism, and internal support mechanism is designed. The internal support mechanism can adaptably abut against the inner wall of the pipe and works with the moving mechanism to achieve coaxial and precise docking of the pipe. Through the coordinated work of the internal support mechanism and the moving mechanism, welding quality and efficiency are ensured.
It achieves stable support and precise connection of pipes of various specifications, improves welding efficiency and quality, reduces manual adjustment errors, simplifies operation procedures, and expands the application range of the equipment.
Smart Images
Figure CN224196252U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipeline welding technology, and in particular to welding apparatus. Background Technology
[0002] Pipeline welding is extremely critical in industrial production and infrastructure construction.
[0003] Currently, the diameter and wall thickness parameters of pipes of different specifications used in different fields vary greatly. Existing pipe welding equipment is mostly designed for pipes of a specific diameter, making it difficult to operate directly on pipes of different specifications. It requires time-consuming adjustments, and even after adjustments, problems such as weak welds and deformation may occur. If high-quality welding is required, welding equipment needs to be designed specifically for a particular pipe specification, which limits the wide applicability of welding equipment. It is impossible to use a single welding equipment flexibly in the welding of multiple pipe specifications, reducing ease of use and increasing construction and time costs.
[0004] Therefore, welding equipment is urgently needed to solve the above problems. Utility Model Content
[0005] The purpose of this invention is to provide a welding device that can meet the welding requirements of various pipe specifications and improve the versatility and convenience of the welding device in practical applications.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] A welding apparatus includes: a base frame including a worktable; a mounting base fixedly mounted on the worktable; a welding head fixedly mounted on the mounting base and configured to weld the joint of two pipes; a moving mechanism including two sliding members slidably mounted on the worktable and symmetrically arranged on both sides of the mounting base; and two inner support mechanisms respectively mounted on the two sliding members and facing each other towards the mounting base. The two pipes can be respectively fitted onto the two inner support mechanisms, the two pipes can be coaxially arranged, and the two inner support mechanisms can respectively abut against the inner wall of the corresponding pipe and support the corresponding pipe.
[0008] As an optional solution, the internal support mechanism includes: a first driving member disposed on the sliding member; and a telescopic abutment assembly, which is capable of telescopic movement and abutting against the inner wall of the pipe. The telescopic abutment assembly is disposed on the output end of the first driving member, and the first driving member is capable of driving the telescopic abutment assembly to rotate, thereby causing the pipe to rotate.
[0009] As an optional solution, the telescopic abutment assembly includes: a rotating roller, which is kinetically connected to the output end of the first driving member, and the first driving member is capable of driving the rotating roller to rotate; a movable ring, which is slidably disposed on the rotating roller, and a plurality of first hinge frames are uniformly arranged on the movable ring along its circumference; a plurality of first rods, the plurality of first ends of the plurality of first rods being rotatably connected to the corresponding first hinge frames; and a plurality of abutment members, the plurality of second ends of the plurality of first rods being rotatably connected to the corresponding abutment members. The pipe is sleeved on the outside of the plurality of abutment members, and the movement of the movable ring can drive the plurality of first rods to rotate, and the plurality of abutment members can abut against the inner wall of the pipe.
[0010] As an optional solution, the telescopic abutment assembly further includes: a first fixing member, fixed on one end of the rotating roller away from the movable ring, wherein multiple second hinge frames and multiple third hinge frames are uniformly arranged along the circumference of both ends of the first fixing member, and the first hinge frame, the second hinge frame and the third hinge frame are aligned along the axial direction of the rotating roller; multiple second rods, wherein multiple first ends of the multiple second rods are rotatably connected to the corresponding second hinge frames, and multiple second ends of the multiple second rods are rotatably connected to the corresponding abutment member; multiple third rods, wherein multiple first ends of the multiple third rods are rotatably connected to the corresponding third hinge frames, and multiple second ends of the multiple third rods are rotatably connected to the corresponding abutment member.
[0011] As an optional solution, the telescopic abutment assembly further includes: a second fixing member fixed to the rotating roller; a connecting member fixed to the movable ring; and a telescopic drive member disposed on the second fixing member, the output end of which is connected to the connecting member, and the telescopic drive member can drive the connecting member to move, thereby driving the movable ring to move.
[0012] As an alternative, the telescopic drive component is a pneumatic cylinder; or, the telescopic drive component is a hydraulic cylinder.
[0013] As an optional solution, the moving mechanism further includes: a double-threaded screw, rotatably mounted on the worktable and extending along a first direction, with opposite threads at both ends of the double-threaded screw, and two sliding members respectively threadedly connected to both ends of the double-threaded screw; a second driving member, mounted on the worktable, with one end of the double-threaded screw connected to the output end of the second driving member and the other end rotatably connected to the worktable, the second driving member capable of driving the double-threaded screw to rotate and causing the two sliding members to move synchronously towards or away from the mounting base.
[0014] As an alternative, the mounting base is provided with a clearance hole through which the twin-threaded screw can pass.
[0015] As an alternative, the welding device also includes multiple guide rods, each extending along the first direction, symmetrically arranged on both sides of the double-threaded screw and fixedly connected to the worktable, and two sliding members slidably connected to the multiple guide rods.
[0016] As an alternative, the frame also includes a support column connected to the worktable for supporting it.
[0017] Beneficial effects:
[0018] This invention provides a welding device. When using this device, two pipes to be welded are first fitted onto two internal support mechanisms. The two internal support mechanisms are then adjusted to fit snugly against the inner walls of the corresponding pipes, providing stable support. The two internal support mechanisms are respectively mounted on two sliding parts of a moving mechanism. Moving these sliding parts allows for flexible adjustment of the pipe positions, ensuring precise alignment of the two pipes. The welding head on the mounting base on the worktable welds the joint between the two pipes. The internal support mechanisms adaptably to the inner diameter of the pipes, abutting against the inner walls and ensuring stability during welding. Combined with the moving mechanism, this ensures coaxial and precise alignment of the two pipes during welding, significantly improving welding efficiency and quality, reducing manual adjustment errors, simplifying the operation process, and meeting the welding needs of various pipe specifications. This enhances the versatility and convenience of the welding device in practical applications. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the welding device provided in an embodiment of the present invention;
[0020] Figure 2 This is a schematic diagram of the internal support mechanism provided in an embodiment of the present utility model;
[0021] Figure 3 yes Figure 2 Enlarged view of point A in the middle.
[0022] In the diagram: 1. Base frame; 11. Workbench; 12. Support column; 2. Mounting base; 21. Clearance hole; 3. Welding head; 4. Moving mechanism; 41. Sliding component; 42. Twin-thread screw; 43. Second driving component;
[0023] 5. Internal support mechanism; 51. First driving component; 52. Telescopic abutment assembly; 520. Rotating roller; 521. Movable ring; 522. First rod; 523. Abutment component; 524. First fixing component; 525. Second rod; 526. Third rod; 527. Second fixing component; 528. Connecting component; 529. Telescopic driving component;
[0024] 531. First hinge frame; 532. Second hinge frame; 533. Third hinge frame;
[0025] 6. Guide rod. Detailed Implementation
[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between 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.
[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0029] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0030] This embodiment provides a welding apparatus, such as... Figure 1As shown, the welding device includes a base frame 1, a mounting base 2, a welding head 3, a moving mechanism 4, and two internal support mechanisms 5. The base frame 1 includes a worktable 11, the mounting base 2 is fixed on the worktable 11, and the welding head 3 is fixed on the mounting base 2 and configured to weld the joint of two pipes. The moving mechanism 4 includes two sliding members 41, which are slidably disposed on the worktable 11 and symmetrically arranged on both sides of the mounting base 2. The two internal support mechanisms 5 are respectively disposed on the two sliding members 41 and are arranged opposite to the mounting base 2. The two pipes can be respectively fitted onto the two internal support mechanisms 5, and the two pipes can be coaxially arranged. The two internal support mechanisms 5 can respectively abut against the inner wall of the corresponding pipe and support the corresponding pipe.
[0031] The welding device provided in this embodiment, when used, first places two pipes to be welded onto two inner support mechanisms 5 respectively. The two inner support mechanisms 5 are then adjusted to adaptably and tightly abut against the corresponding inner walls of the pipes, providing stable support for the two pipes. The two inner support mechanisms 5 are respectively mounted on two sliding parts 41 of the moving mechanism 4. Moving the two sliding parts 41 allows for flexible adjustment of the pipe positions, ensuring precise docking of the two pipes. The welding head 3 of the mounting base 2 on the worktable 11 welds the joint of the two pipes. The inner support mechanisms 5 can adaptably fit the inner diameter of the pipes, abut against the inner walls of the pipes, and ensure the stability of the two pipes during welding. Combined with the moving mechanism 4, this ensures that the two pipes can achieve coaxial and precise docking during welding, significantly improving welding efficiency and quality, reducing manual adjustment errors, simplifying the operation process, and meeting the welding needs of various pipe specifications, thus enhancing the versatility and convenience of the welding device in practical applications.
[0032] In this embodiment, the slider 41 is a sliding plate. In other embodiments, the slider 41 may also be a sliding block, which is not specifically limited here.
[0033] like Figures 1-2 As shown, the inner support mechanism 5 includes a first driving member 51 and a telescopic abutment component 52. The first driving member 51 is mounted on the sliding member 41. The telescopic abutment component 52 can extend and retract to abut against the inner wall of the pipe. The telescopic abutment component 52 is located at the output end of the first driving member 51. The first driving member 51 can drive the telescopic abutment component 52 to rotate, thereby causing the pipe to rotate. The telescopic abutment component 52 can extend and retract flexibly, closely fitting the inner wall of pipes of different diameters, ensuring stable support and effectively solving the problem of adapting to multiple pipe sizes. The first driving member 51 drives the telescopic abutment component 52 to rotate, causing the pipe to rotate synchronously, so that the welding head 3 can perform uniform welding on the circumference of the pipe without multi-angle adjustment, significantly improving welding efficiency and quality.
[0034] Optionally, the first driving component 51 can be a stepper motor, a hydraulic motor, etc., without specific limitations.
[0035] Specifically, when using the welding device, two pipes are respectively fitted onto two telescopic abutment components 52. The telescopic abutment components 52 telescopically move to make them tightly abut against the inner wall of the corresponding pipe and provide stable support. The first driving component 51 drives the telescopic abutment components 52 to rotate, thereby driving the pipe to rotate, which facilitates circumferential welding at the joint of the two pipes and significantly improves welding efficiency and quality.
[0036] like Figure 2 As shown, the telescopic abutment assembly 52 includes a rotating roller 520, a movable ring 521, a plurality of first rods 522, and a plurality of abutment members 523. The rotating roller 520 is connected to the output end of the first driving member 51, and the first driving member 51 can drive the rotating roller 520 to rotate. The movable ring 521 is slidably disposed on the rotating roller 520. A plurality of first hinge frames 531 are evenly arranged on the movable ring 521 along its circumference. A plurality of first ends of the plurality of first rods 522 are rotatably connected to the corresponding first hinge frames 531, and a plurality of second ends of the plurality of first rods 522 are rotatably connected to the corresponding abutment members 523. The pipe is sleeved on the outside of the plurality of abutment members 523. The movement of the movable ring 521 can drive the plurality of first rods 522 to rotate, and the plurality of abutment members 523 can abut against the inner wall of the pipe. When the movable ring 521 slides along the rotating roller 520, it drives the abutment member 523 to extend and retract flexibly through the transmission of the first hinge frame 531 and the first rod 522. This allows for precise adaptation to pipes of different diameters, effectively solving the problem of pipe size differences. The abutment members 523, which are evenly distributed around the circumference, make multiple contacts with the inner wall of the pipe, ensuring stable support and preventing pipe shaking during welding. At the same time, the rotating roller 520 is linked with the first driving member 51, which can drive the pipe to rotate at a uniform speed. This, combined with the welding head 3, enables uniform welding in the entire circumference, significantly improving welding efficiency and quality.
[0037] It is worth noting that the abutment 523 can be a suction cup. In actual use, the operator can first attach the suction cup-type abutment 523 to the inner wall of the pipe, and then push the movable ring 521. The first rod 522 rotates around the first hinge frame 531 to further adjust the abutment force of the abutment 523 on the inner wall of the pipe. After the adjustment is completed, the position of the movable ring 521 is locked, thereby forming a more effective support for the pipe.
[0038] In other embodiments, when the welding device is applied to the welding of metal pipes, the abutment 523 can be a magnetic abutment, utilizing the magnetic attraction between the metal material and the magnetic abutment to achieve a stable abutment. In still some embodiments, the abutment 523 can be a rubber pad; the type of abutment 523 is not specifically limited here.
[0039] like Figure 2As shown, the telescopic abutment assembly 52 also includes a first fixing member 524, a plurality of second rods 525, and a plurality of third rods 526. The first fixing member 524 is fixed to one end of the rotating roller 520 away from the movable ring 521. A plurality of second hinge frames 532 and a plurality of third hinge frames 533 are evenly arranged along the circumference of both ends of the first fixing member 524, and the first hinge frames 531, second hinge frames 532, and third hinge frames 533 are aligned along the axial direction of the rotating roller 520. A plurality of first ends of the plurality of second rods 525 are rotatably connected to the corresponding second hinge frames 532, and a plurality of second ends of the plurality of second rods 525 are rotatably connected to the corresponding abutment members 523. A plurality of first ends of the plurality of third rods 526 are rotatably connected to the corresponding third hinge frames 533, and a plurality of second ends of the plurality of third rods 526 are rotatably connected to the corresponding abutment members 523. On the one hand, the multi-link linkage structure formed by the second hinge frame 532, the third hinge frame 533, the second rod 525, and the third rod 526 with the abutment member 523 significantly enhances the support stability, making the abutment member 523 more evenly stressed and effectively avoiding offset or swaying caused by single-point support. Under the synergistic effect of multiple rods, it can adapt to a wider range of pipe diameter changes, improving the support compatibility for pipes of different specifications. On the other hand, it ensures stable support when the pipe rotates, ensuring accurate pipe positioning during welding, thereby improving welding quality and efficiency and optimizing the overall reliability of the welding device.
[0040] In this embodiment, there are three of each: the first hinge frame 531, the second hinge frame 532, the third hinge frame 533, the first rod 522, the second rod 525, the third rod 526, and the abutment member 523. Each abutment member 523 is rotatably connected to one first rod 522, one second rod 525, and one third rod 526. The included angle between any two first rods 522 is 120 degrees, the included angle between any two second rods 525 is 120 degrees, and the included angle between any two third rods 526 is 120 degrees. The three abutment members 523 are evenly distributed circumferentially along the inner wall of the pipe and all extend in the first direction, ensuring a uniform distribution of the supporting force on the pipe, avoiding excessive local stress that could lead to pipe deformation, and significantly improving support stability. Simultaneously, the three sets of hinge frames and connecting rods work together to allow the three abutment members 523 to extend and retract synchronously when the movable ring 521 moves, precisely adapting to pipes of different diameters and ensuring support reliability.
[0041] In other embodiments, the number of the first hinge frame 531, the second hinge frame 532, the third hinge frame 533, the first rod 522, the second rod 525, the third rod 526, and the abutment member 523 can all be four, five, six, etc., and no specific limitation is made here.
[0042] like Figures 2-3As shown, the telescopic abutment assembly 52 also includes a second fixing member 527, a connecting member 528, and a telescopic drive member 529. The second fixing member 527 is fixed on the rotating roller 520, the connecting member 528 is fixed on the movable ring 521, and the telescopic drive member 529 is disposed on the second fixing member 527. The output end of the telescopic drive member 529 is connected to the connecting member 528, and the telescopic drive member 529 can drive the connecting member 528 to move, thereby driving the movable ring 521 to move. On the one hand, through its connection with the connecting member 528, the telescopic drive member 529 can stably drive the movable ring 521 to slide along the rotating roller 520. Compared with manual adjustment, this significantly improves the response speed and control accuracy of the extension and retraction of the abutment member 523, and can quickly adapt to pipes of different diameters. On the other hand, this automated drive method ensures the smoothness of the movement of the movable ring 521, thereby enabling multiple abutment members 523 to evenly abut against the inner wall of the pipe, enhancing the support stability, reducing human operation errors, and significantly improving the efficiency and quality of welding operations.
[0043] In this embodiment, the telescopic drive component 529 is a cylinder. The main body of the cylinder is connected to the second fixing component 527. The piston rod of the cylinder can reciprocate relative to the main body of the cylinder. The piston rod is connected to the connecting component 528. The movement of the piston rod can drive the connecting component 528 to move, which in turn drives the movable ring 521 to move, which in turn drives the first rod 522 to rotate. The abutment component 523 moves to abut against the inner wall of the pipe to support the pipe.
[0044] In other embodiments, the telescopic drive 529 is a hydraulic cylinder. The main body of the hydraulic cylinder is connected to the second fixing member 527, and the hydraulic rod of the hydraulic cylinder can reciprocate relative to the main body of the hydraulic cylinder. The hydraulic rod is connected to the connecting member 528, and the movement of the hydraulic rod can drive the connecting member 528 to move, thereby driving the movable ring 521 to move, thereby driving the first rod 522 to rotate, and the abutment member 523 to move and abut against the inner wall of the pipe to support the pipe.
[0045] like Figure 1 As shown, the moving mechanism 4 also includes a double-threaded screw 42 and a second driving member 43. The double-threaded screw 42 is rotatably mounted on the worktable 11 and extends along a first direction. The threads at both ends of the double-threaded screw 42 are opposite. Two sliding members 41 are threadedly connected to both ends of the double-threaded screw 42, respectively. The second driving member 43 is mounted on the worktable 11. One end of the double-threaded screw 42 is connected to the output end of the second driving member 43, and the other end is rotatably connected to the worktable 11. The second driving member 43 can drive the double-threaded screw 42 to rotate and cause the two sliding members 41 to move synchronously towards or away from the mounting base 2. The unique structure of the reverse threads at both ends of the double-threaded screw 42, driven by the second driving member 43, allows the two sliding members 41 to move synchronously towards or away from each other, ensuring that the pipes installed on it can be quickly and accurately connected or separated, effectively avoiding the errors and inefficiencies of manual adjustment.
[0046] Optionally, the second driving component 43 can be a stepper motor, a hydraulic motor, etc., without specific limitations.
[0047] In this embodiment, the moving mechanism 4 also includes a bearing. The outer ring sleeve of the bearing is connected to the worktable 11, and the inner ring sleeve of the bearing is connected to the twin-screw 42, so that the twin-screw 42 is rotatably connected to the worktable 11. This extends the service life of the twin-screw 42 and the worktable 11 and reduces component wear caused by friction.
[0048] like Figure 1 As shown, the mounting base 2 is provided with a clearance hole 21, through which the double-threaded screw 42 can pass. The mounting base 2 is provided with a clearance hole 21 for the double-threaded screw 42 to pass through, which cleverly solves the problem of spatial interference between the double-threaded screw 42 and the mounting base 2.
[0049] In this embodiment, the mounting base 2 is located at the center of the workbench 11, so that the welding head 3 can be kept in the optimal welding position on the workbench 11. This does not affect the rotation of the twin screw 42 to ensure the precise connection of the two pipes, and also ensures the normal operation of the welding work. This achieves a balance between the compactness of the welding device's structural layout and its functionality.
[0050] like Figure 1 As shown, the welding device also includes multiple guide rods 6, all extending along a first direction. These guide rods 6 are symmetrically arranged on both sides of the twin-thread screw 42 and fixedly connected to the worktable 11. Two sliding members 41 are slidably connected to the guide rods 6. On one hand, the guide rods 6 provide stable guidance for the sliding members 41, ensuring that they can move synchronously towards or away from each other along the first direction under the drive of the twin-thread screw 42, avoiding movement deviation and making pipe connection more precise. On the other hand, the guide rods 6 share some of the force on the sliding members 41, reducing the pressure on the twin-thread screw 42, reducing wear, and extending service life.
[0051] In this embodiment, there are two guide rods 6, that is, one guide rod 6 is provided on each side of the twin-threaded screw 42. In other embodiments, there may be four guide rods 6, corresponding to two guide rods 6 provided on each side of the twin-threaded screw 42. In still some embodiments, there may be six, eight, etc., and no specific limitation is made here.
[0052] like Figure 1 As shown, the base frame 1 also includes a support column 12, which is connected to the worktable 11 and is used to support the worktable 11. The support column 12 provides stable support for the worktable 11, ensuring that it remains stable during welding operations and avoiding the impact of shaking or vibration on welding accuracy.
[0053] In this embodiment, there are four support columns 12, which are evenly arranged along the circumference of the worktable 11. In other embodiments, the number of support columns 12 can also be six, eight, etc., as long as they can provide good support for the worktable 11. No specific limitation is made here.
[0054] In summary, the process of welding two pipes using a welding device is roughly as follows:
[0055] (1) The two pipes to be welded are respectively fitted onto the two telescopic abutment components 52. The corresponding telescopic drive component 529 drives the connecting component 528 to move and drives the movable ring 521 to slide on the rotating roller 520, so as to drive the first rod 522, the second rod 525, and the third rod 526 to rotate, so that the abutment component 523 is tightly abutted against the inner wall of the corresponding pipe and supports the corresponding pipe.
[0056] (2) The second driving component 43 drives the double screw 42 to rotate, so that the two sliding components 41 move synchronously towards each other along the guide rod 6, and accurately connects the two pipes respectively sleeved on the sliding components 41.
[0057] (3) The two first driving components 51 drive the two rotating rollers 520 to rotate, which in turn drives the two pipes to rotate at a constant speed. The welding head 3 performs all-round welding on the joint of the two pipes to complete the entire welding process.
[0058] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A welding apparatus, characterized in that, include: The base frame (1) includes a workbench (11); Mounting base (2) is fixed on the workbench (11); The welding head (3) is fixed on the mounting base (2) and is configured to weld the joint of two pipes; The moving mechanism (4) includes two sliding members (41), which are slidably disposed on the worktable (11) and symmetrically disposed on both sides of the mounting base (2); Two internal support mechanisms (5) are respectively set on the two sliding members (41) and are arranged opposite to the mounting base (2). The two pipes can be respectively sleeved on the two internal support mechanisms (5). The two pipes can be coaxially arranged. The two internal support mechanisms (5) can respectively abut against the inner wall of the corresponding pipe and support the corresponding pipe.
2. The welding apparatus according to claim 1, characterized in that, The internal support mechanism (5) includes: The first driving member (51) is disposed on the sliding member (41); Telescopic abutment component (52) is capable of telescopic movement and abutting against the inner wall of the pipe. The telescopic abutment component (52) is disposed on the output end of the first driving member (51). The first driving member (51) can drive the telescopic abutment component (52) to rotate and drive the pipe to rotate.
3. The welding apparatus according to claim 2, characterized in that, The telescopic abutment assembly (52) includes: A rotating roller (520) is connected to the output end of the first driving member (51) for transmission, and the first driving member (51) can drive the rotating roller (520) to rotate. The movable ring (521) is slidably disposed on the rotating roller (520), and a plurality of first hinge frames (531) are uniformly disposed on the movable ring (521) along its circumference; Multiple first rods (522), with multiple first ends of the multiple first rods (522) rotatably connected to the corresponding first hinge frame (531); Multiple abutment members (523), multiple second ends of multiple first rods (522) are rotatably connected to the corresponding abutment members (523), the pipe is sleeved on the outside of the multiple abutment members (523), the movement of the movable ring (521) can drive the multiple first rods (522) to rotate, and the multiple abutment members (523) can abut against the inner wall of the pipe.
4. The welding apparatus according to claim 3, characterized in that, The telescopic abutment assembly (52) also includes: A first fixing member (524) is fixed on one end of the rotating roller (520) away from the movable ring (521). Both ends of the first fixing member (524) are evenly provided with a plurality of second hinge frames (532) and a plurality of third hinge frames (533) along their circumference. The first hinge frame (531), the second hinge frame (532) and the third hinge frame (533) are aligned along the axial direction of the rotating roller (520). Multiple second rods (525), multiple first ends of multiple second rods (525) are rotatably connected to corresponding second hinge frames (532), and multiple second ends of multiple second rods (525) are rotatably connected to corresponding abutment members (523); Multiple third rods (526), multiple first ends of the multiple third rods (526) are rotatably connected to the corresponding third hinge frame (533), and multiple second ends of the multiple third rods (526) are rotatably connected to the corresponding abutment (523).
5. The welding apparatus according to claim 3, characterized in that, The telescopic abutment assembly (52) also includes: The second fixing member (527) is fixed on the rotating roller (520); The connector (528) is fixed to the movable ring (521); A telescopic drive member (529) is disposed on the second fixing member (527). The output end of the telescopic drive member (529) is connected to the connecting member (528). The telescopic drive member (529) can drive the connecting member (528) to move, thereby driving the movable ring (521) to move.
6. The welding apparatus according to claim 5, characterized in that, The telescopic drive component (529) is a cylinder; or the telescopic drive component (529) is a hydraulic cylinder.
7. The welding apparatus according to any one of claims 1-6, characterized in that, The moving mechanism (4) also includes: A double-threaded screw (42) is rotatably mounted on the worktable (11) and extends along a first direction. The threads at both ends of the double-threaded screw (42) are opposite, and the two sliding members (41) are threadedly connected to both ends of the double-threaded screw (42). The second driving member (43) is disposed on the worktable (11). One end of the double screw (42) is connected to the output end of the second driving member (43), and the other end is rotatably connected to the worktable (11). The second driving member (43) can drive the double screw (42) to rotate and drive the two sliding members (41) to move synchronously towards or away from each other relative to the mounting base (2).
8. The welding apparatus according to claim 7, characterized in that, The mounting base (2) is provided with a clearance hole (21), and the double-threaded screw (42) can pass through the clearance hole (21).
9. The welding apparatus according to claim 8, characterized in that, The welding device also includes a plurality of guide rods (6), which extend along the first direction. The plurality of guide rods (6) are symmetrically arranged on both sides of the double-wire screw (42) and fixedly connected to the worktable (11). The two sliding members (41) are slidably connected to the plurality of guide rods (6).
10. The welding apparatus according to any one of claims 1-6, characterized in that, The base frame (1) also includes a support column (12), which is connected to the workbench (11) and is used to support the workbench (11).