Pipeline welding machine

Abstract

The utility model provides a pipeline welding machine which comprises a working table, a collecting cavity is formed in the working table, a working groove is formed in the working table, and a collecting opening communicated with the collecting cavity is formed in the groove bottom of the working groove; the clamping unit is arranged on the workbench, and the clamping unit is used for clamping a pipeline; the welding unit is arranged on the workbench and comprises a welding head, and the welding head is located above the working groove; the driving assembly is arranged on the workbench; and the cleaning unit can be driven by the driving assembly to move in the working groove so as to sweep the welding slag in the working groove into the collecting opening. Welding slag falling into the working groove in the welding process can be swept into the collecting opening through the cleaning unit, automatic cleaning is achieved, the cleaning efficiency is improved, the welding working environment is improved, and the body health of construction workers is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment technology, and in particular to a pipe welding machine. Background Technology

[0002] In modern industry and construction, pipeline systems are widely used, undertaking the crucial task of transporting various media such as gases and liquids. Pipeline connections are extensively applied in industries such as petrochemicals, long-distance pipeline construction, municipal construction, and boiler power plant construction. There are various methods of pipeline connection, among which welding is widely used due to its advantages of strong, durable joints and high sealing performance.

[0003] A pipe circumferential welder is a specialized piece of equipment used for welding circumferential joints in pipelines, widely used in pipeline engineering welding operations. Its main function is to weld the end faces or circumferential joints of pipes, thereby ensuring weld quality and improving work efficiency. Due to its high efficiency and precision, the pipe circumferential welder has become an indispensable piece of equipment in pipeline welding projects.

[0004] However, during the pipe connection and welding process, impurities such as welding slag are inevitably generated. These slags will splatter from the welding point and fall on the workbench or surrounding surfaces, which are difficult to clean and require manual cleaning, which is not only inefficient but also affects the health of construction workers. Utility Model Content

[0005] The purpose of this invention is to provide a pipe welding machine that can sweep the welding slag that falls into the working tank during the welding process into the collection port through a cleaning unit, thereby achieving automated cleaning, improving cleaning efficiency, improving the working environment for welding, and protecting the health of construction workers.

[0006] To achieve the above objectives, this utility model provides a pipe welding machine, which includes:

[0007] A workbench, the workbench having a collection chamber, the workbench having a working groove, and the bottom of the working groove having a collection port communicating with the collection chamber;

[0008] A clamping unit is disposed on the worktable, and the clamping unit is used to clamp the pipe;

[0009] A welding unit is disposed on the workbench, the welding unit includes a welding head, the welding head being located above the working groove;

[0010] A drive assembly is mounted on the worktable;

[0011] A cleaning unit, which can move in the working tank under the drive of the drive assembly, to sweep the welding slag in the working tank into the collection port.

[0012] Optionally, the drive assembly includes a power component and a guide component. The guide component includes a moving rod and a guide screw passing through the moving rod. The moving rod has a threaded hole that mates with the guide screw. The moving rod is connected to the cleaning unit. The power component can drive the guide screw to rotate, thereby moving the moving rod along the guide screw, and thus driving the cleaning unit to move in the working groove.

[0013] Optionally, the guide screw is rotatably mounted in the working groove, and a gap is left between the moving rod and the bottom of the working groove. The power component includes a second motor, which is mounted on the worktable and connected to one end of the guide screw.

[0014] Optionally, the cleaning unit includes a scraper connected to the moving rod and perpendicular to the guide screw, the scraper being used to clean welding slag on the bottom surface of the working groove.

[0015] Optionally, the cleaning unit includes a spring and a rotating rod assembly. The rotating rod assembly includes a rotating rod and a pull rope wound around the rotating rod. The scraper is connected to the moving rod via the spring. One end of the pull rope is connected to the rotating rod, and the other end of the pull rope is connected to the scraper. The rotating rod is rotatably mounted on the moving rod. The rotating rod is provided with a second gear. The side wall of the working groove is provided with a plurality of racks spaced apart along the moving direction of the moving rod, and the racks protrude from the side wall of the working groove, so that when the moving rod moves, the second gear can intermittently mesh with the plurality of racks, thereby driving the scraper to move relative to the moving rod.

[0016] Optionally, there are two guide screws and two rotating rod assemblies. The two guide screws are located on opposite sides of the working groove and are parallel to each other. The rack is disposed on the side wall of the working groove corresponding to the guide screw. Each end of the moving rod is threadedly engaged with one of the guide screws. The two rotating rod assemblies are located at the two ends of the moving rod and are used to intermittently mesh with the rack on the side wall of the corresponding working groove.

[0017] Optionally, the clamping unit includes a first support frame, a second support frame, a first rotating cylinder, a second rotating cylinder, a fastening assembly, and a telescopic assembly. The first support frame and the second support frame are both mounted on the worktable. The first rotating cylinder is rotatably mounted on the first support frame. The first rotating cylinder is connected to a pipe passing through the first rotating cylinder via the fastening assembly. The second rotating cylinder is connected to a pipe passing through the second rotating cylinder via the fastening assembly. The fixed end of the telescopic assembly is mounted on the second support frame. The second rotating cylinder is rotatably mounted on the moving end of the telescopic assembly. The central axis of the first rotating cylinder and the central axis of the second rotating cylinder are on the same straight line. A gap is left between the first rotating cylinder and the second rotating cylinder for connecting the pipe. The telescopic assembly can drive the second rotating cylinder to move axially to adjust the gap.

[0018] Optionally, the clamping unit includes a first motor mounted on the first support frame. A toothed ring is provided on the outer circumferential surface of the first rotating drum, and the first motor drives the first rotating drum to rotate via the toothed ring. It is understood that the toothed ring only occupies a portion of the outer circumferential surface of the first rotating drum.

[0019] Optionally, the end of the first rotating drum facing the second rotating drum is provided with a first extension plate and a second extension plate. The fastening assembly includes a first clamping plate, a second clamping plate, an adjusting screw, and a guide rod. The first clamping plate and the second clamping plate are disposed between the first extension plate and the second extension plate, and are used to clamp the pipe between the first clamping plate and the second clamping plate. The adjusting screw passes through the first extension plate, the first clamping plate, the second clamping plate, and the second extension plate in sequence. One end of the guide rod is connected to the first extension plate, and the other end of the guide rod is connected to the second extension plate. The adjusting screw and the guide rod pass through the first clamping plate and the second clamping plate, respectively. The distance between the adjusting screw and the guide rod is used to allow the pipe to pass through. The adjusting screw includes a first rod segment and a second rod segment. The direction of the thread on the first rod segment is opposite to the direction of the thread on the second rod segment. The first rod segment is threadedly connected to the first clamping plate, and the second rod segment is threadedly connected to the second clamping plate. The end of the second rotating cylinder facing the first rotating cylinder is provided with a third extension plate and a fourth extension plate. Similarly, the fastening assembly is also provided between the third extension plate and the fourth extension plate.

[0020] Optionally, the welding unit includes a height adjustment component and a welding component. The height adjustment component is mounted on the worktable, and the welding component includes a rocker arm and a welding head mounted on the rocker arm. The rocker arm and the height adjustment component are hinged together, and the height adjustment component can adjust the height of the welding component.

[0021] As configured above, this utility model can sweep the welding slag that falls into the working tank during the welding process into the collection port through the cleaning unit, and the scraper can move relative to the moving rod to make a shoveling action, which can more thoroughly remove the welding slag in the working tank. Furthermore, the cleaning unit of this utility model can realize automated cleaning under the drive component, which improves the cleaning efficiency, greatly improves the welding working environment, reduces the workload of construction workers, and protects the health of construction workers. Attached Figure Description

[0022] Those skilled in the art will understand that the accompanying drawings are provided to better understand the present invention and do not constitute any limitation on the scope of the present invention. Wherein:

[0023] Figure 1 This is a schematic diagram of a pipe welding machine according to an embodiment of the present invention;

[0024] Figure 2 for Figure 1 Enlarged view of point A;

[0025] Figure 3 This is a schematic diagram of the guide component and cleaning unit of a pipe welding machine according to an embodiment of the present invention;

[0026] Figure 4 for Figure 3 Enlarged view of point B.

[0027] The accompanying figure is labeled as follows:

[0028] 100-Workbench; 110-Working trough; 120-Collection port; 130-Cleaning door; 200-First hydraulic telescopic rod; 210-Rocker arm; 220-Welding head; 310-First support frame; 320-First rotating drum; 321-Gear ring; 322-First extension plate; 323-Second extension plate; 331-Guide rod; 332-Adjusting screw; 333-Turner; 341-First clamping plate; 342-Second clamping plate 350-First motor; 351-First gear; 360-Second hydraulic telescopic rod; 361-Fixing block; 362-Mounting cylinder; 370-Second rotating cylinder; 371-Third extension plate; 372-Fourth extension plate; 410-Guide screw; 420-Second motor; 430-Moving rod; 440-Scraper; 441-Spring; 450-Rotating rod; 451-Second gear; 452-Rack; 453-Pull rope. Detailed Implementation

[0029] In this document, unless otherwise stated, the terms “upper,” “lower,” “left,” “right,” “inner,” “outer,” “front,” “back,” “top,” “bottom,” etc., are used to indicate orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a characteristic orientation and operation, and therefore should not be construed as a limitation of the present invention.

[0030] The specific embodiments of this utility model will now be described in more detail with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0031] The preferred embodiments of this utility model are given below with reference to the accompanying drawings and described in detail.

[0032] Figure 1 This is a schematic diagram of a pipe welding machine according to an embodiment of the present invention. Please refer to it. Figure 1 This utility model provides a pipe welding machine, which includes a worktable 100, a clamping unit, a welding unit, a drive assembly, and a cleaning unit.

[0033] The workbench 100 has a collection chamber and a work trough 110. The bottom of the work trough 110 has a collection port 120 that communicates with the collection chamber. A cleaning door 130 is hinged to the side of the workbench 100. Opening the cleaning door 130 allows access to the collection chamber.

[0034] Please refer to Figure 1 and Figure 2The clamping unit is mounted on the workbench 100 and is used to clamp the pipe. The clamping unit includes a first support frame 310, a second support frame 311, a first rotating cylinder 320, a second rotating cylinder 370, a fastening assembly, and a telescopic assembly. The first support frame 310 and the second support frame 311 are both mounted on the workbench 100. The first rotating cylinder 320 is rotatably mounted on the first support frame 310. The first rotating cylinder 320 is connected to the pipe passing through the first rotating cylinder 320 through the fastening assembly. The second rotating cylinder 370 is connected to the pipe passing through the second rotating cylinder 370 through the fastening assembly. The fixed end of the telescopic assembly is mounted on the second support frame 311, and the second rotating cylinder 370 is rotatably mounted on the moving end of the telescopic assembly. The central axis of the first rotating cylinder 320 and the central axis of the second rotating cylinder 370 are on the same straight line. A gap is left between the first rotating cylinder 320 and the second rotating cylinder 370 for connecting the pipe. The telescopic assembly can drive the second rotating cylinder 370 to move axially to adjust the gap. Furthermore, the clamping unit includes a first motor 350, which is mounted on a first support frame 310. A gear ring 321 is provided on the outer circumferential surface of the first rotating drum 320. The first motor 350 drives the first rotating drum 320 to rotate via the gear ring 321. For example, a first gear 351 is provided on the output shaft of the first motor 350. The first gear 351 meshes with the gear ring 321, thereby driving the gear ring 321 to rotate, and thus causing the first rotating drum 320 to rotate.

[0035] Furthermore, the first rotating drum 320 has a first extension plate 322 and a second extension plate 323 at its end facing the second rotating drum 370. The fastening assembly includes a first clamping plate 341, a second clamping plate 342, an adjusting screw 332, and a guide rod 331. The first clamping plate 341 and the second clamping plate 342 are disposed between the first extension plate 322 and the second extension plate 323, and are used to clamp the pipe between the first clamping plate 341 and the second clamping plate 342. The adjusting screw 332 passes through the first extension plate 322, the first clamping plate 341, the second clamping plate 342, and the second extension plate 323 in sequence. One end of the guide rod 331 is connected to the first extension plate 322, and the other end of the guide rod 331 is connected to the second extension plate 323. The guide rod 331 passes through the first extension plate 322 and the second extension plate 323 in sequence. A clamping plate 341 and a second clamping plate 342 are provided. An adjusting screw 332 and a guide rod 331 are parallel to each other, and the distance between the adjusting screw 332 and the guide rod 331 is used to allow the pipe to pass through. The adjusting screw 332 includes a first rod segment and a second rod segment. The direction of the thread on the first rod segment is opposite to the direction of the thread on the second rod segment. The first rod segment is threadedly connected to the first clamping plate 341, and the second rod segment is threadedly connected to the second clamping plate 342. For example, the first extension plate 322 and the second extension plate 323 are loosely fitted on the adjusting screw 332. The end of the second rotating cylinder 370 facing the first rotating cylinder 320 is provided with a third extension plate 371 and a fourth extension plate 372. Similarly, a fastening assembly is also provided between the third extension plate 371 and the fourth extension plate 372. A handle 333 is provided at the end of the adjusting screw 332 extending out of the first extension plate 322 to facilitate the rotation of the adjusting screw 332. Both the first clamping plate 341 and the second clamping plate 342 have arc-shaped portions and straight portions. Each side of the arc-shaped portion has a straight portion. The arc-shaped portion directly contacts the pipe, allowing for a more secure clamping. In this embodiment, the adjusting screw 332 and the guide rod 331 pass through the two straight portions of the first clamping plate 341, and similarly, they also pass through the two straight portions of the second clamping plate 342. With this configuration, rotating the adjusting screw 332 moves the first clamping plate 341 and the second clamping plate 342 closer together or further apart, thereby clamping or releasing the pipe.

[0036] The telescopic assembly may include a second hydraulic telescopic rod 360, one end of which is connected to a fixing block 361. An installation cylinder 362 is fixedly installed on the fixing block 361, and a second rotating cylinder 370 is rotatably installed inside the installation cylinder 362.

[0037] A welding unit is mounted on a workbench 100 and includes a welding head 220 located above a working groove 110. Further, the welding unit includes a height adjustment assembly and a welding assembly. The height adjustment assembly is mounted on the workbench 100, and the welding assembly includes a rocker arm 210 and a welding head 220 mounted on the rocker arm 210. The rocker arm 210 and the height adjustment assembly are hinged, and the height adjustment assembly can adjust the height of the welding assembly. For example, the height adjustment assembly may include a first hydraulic telescopic rod 200, which is hinged to the rocker arm 210. The height of the first hydraulic telescopic rod 200 can be changed, thereby changing the height of the rocker arm 210 to accommodate pipes of different heights and perform circumferential welding on them.

[0038] Please refer to Figure 3 The drive assembly is mounted on the worktable 100 and includes a power component and a guide component. The guide component includes a moving rod 430 and a guide screw 410 passing through the moving rod 430. The moving rod 430 has a threaded hole that mates with the guide screw 410. The moving rod 430 is connected to the cleaning unit. The power component can drive the guide screw 410 to rotate, thereby moving the moving rod 430 along the guide screw 410, and thus driving the cleaning unit to move in the working groove 110. Furthermore, the guide screw 410 is rotatably mounted in the working groove 110, and a gap is left between the moving rod 430 and the bottom of the working groove 110. The power component includes a second motor 420, which is mounted on the worktable 100 and connected to one end of the guide screw 410.

[0039] The cleaning unit can move within the working groove 110 under the drive of the drive assembly to sweep the welding slag in the working groove 110 into the collection port 120. Further, the cleaning unit includes a scraper 440, which is connected to the moving rod 430 and perpendicular to the guide screw 410. The scraper 440 is used to clean the welding slag on the bottom surface of the working groove 110. Even further, the cleaning unit includes a spring 441 and a rotating rod assembly. The rotating rod assembly includes a rotating rod 450 and a pull rope 453 wound around the rotating rod 450. The scraper 440 is connected to the moving rod 430 via the spring 441. One end of the pull rope 453 is connected to the rotating rod 450, and the other end is connected to the scraper 440. The rotating rod 450 is rotatably mounted on the moving rod 430, and a second gear 451 is provided on the rotating rod 450, for example, on the end of the rotating rod 450 that protrudes from the moving rod 430. The side wall of the working groove 110 is provided with multiple racks 452 spaced apart along the moving direction of the moving rod 430. In this embodiment, the height of the racks 452 is higher than the height of the guide screw 410, and the racks 452 protrude from the side wall of the working groove 110. This allows the second gear 451 to intermittently mesh with the multiple racks 452 when the moving rod 430 moves, thereby driving the scraper 440 to move relative to the moving rod 430. That is, the scraper 440 performs a scraping action, which can more thoroughly remove the welding slag in the working groove 110. It is understood that there are multiple springs.

[0040] Specifically, the working groove 110 can be rectangular, and there are two guide screws 410 and two rotating rod assemblies. The two guide screws 410 are located on opposite sides of the working groove 110, and the first support frame 310 and the second support frame 311 are also located on opposite sides of the working groove 110, so that the welding slag falls into the working groove 110. In this embodiment, a groove 400 is provided on each of the two opposite side walls of the working groove 110 for installing the guide screws 410. The two guide screws 410 are parallel to each other, and the moving rod 430 is perpendicular to the guide screws 410. The rack 452 is set on the side wall of the working groove 110 corresponding to the guide screws 410. Each end of the moving rod 430 is threadedly engaged with one of the guide screws 410. The two rotating rod assemblies are located at the two ends of the moving rod 430, and are used to intermittently mesh with the racks 452 on the side wall of the corresponding working groove 110. The collection port 120 can be located on the side of the working trough 110 where the guide screw 410 is not installed, that is, at the end of the travel of the scraper 440.

[0041] As configured above, this utility model can sweep the welding slag that falls into the working groove 110 during the welding process into the collection port 120 through the cleaning unit, and the scraper 440 can move relative to the moving rod 430 to make a shoveling action, which can more thoroughly remove the welding slag in the working groove 110. Furthermore, the cleaning unit of this utility model can realize automated cleaning under the drive of the drive component, which improves the cleaning efficiency, greatly improves the welding working environment, reduces the workload of construction workers, and protects the health of construction workers.

[0042] The working principle and process of this utility model are as follows: The operator rotates the adjusting screw 332 by turning the handle 333 to bring the first clamping plate 341 and the second clamping plate 342 closer or further apart, thereby clamping or loosening the pipe, which is beneficial for aligning the ends of the two pipes and improving the efficiency and effect of circumferential welding; the second hydraulic telescopic rod 360 drives the second rotating cylinder 370 to move horizontally through the fixing block 361 and the mounting cylinder 362, thereby adjusting the distance between the two pipes. After the two pipes are connected, the height of the welding head 220 is adjusted by the first hydraulic telescopic rod 200 to adapt to pipes of different heights and perform circumferential welding. Then, the first motor 350 is started to drive the pipe to rotate at a uniform speed through the clamping unit to ensure the uniformity of circumferential welding.

[0043] After welding is completed, the second motor 420 is started. The second motor 420 drives the moving rod 430 to move towards the collection port 120, so that the scraper 440 scrapes the welding slag that has fallen into the working groove 110 into the collection port 120. At the same time as the moving rod 430 moves, when the second gear 451 and the rack 452 mesh, the second gear 451 drives the rotating rod 450 to rotate, so that the pull rope 453 is wrapped around the rotating rod 450 and drives the scraper 440 to move closer to the moving rod 430. At this time, the spring 441 is compressed. When the second gear 451 and the rack 452 disengage, the scraper 440 moves away from the moving rod 430 under the action of the spring 441. That is, the scraper 440 moves towards the collection port 120 and shovels forward at the same time, which can more thoroughly remove the welding slag in the working groove 110, so that the welding slag falls from the collection port 120 into the collection chamber of the worktable 100.

[0044] It should be noted that references to "an embodiment," "an embodiment," "a specific embodiment," "some embodiments," etc., in the specification only indicate that the described embodiment may include a specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Additionally, when a specific feature, structure, or characteristic is described in conjunction with an embodiment, whether explicitly described or not, implementing such a feature, structure, or characteristic in conjunction with other embodiments is within the knowledge of those skilled in the art.

[0045] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple, and relevant parts can be referred to the method section.

[0046] It should also be noted that although the present invention has been disclosed above with reference to preferred embodiments, these embodiments are not intended to limit the present invention. For any person skilled in the art, many possible variations and modifications can be made to the present invention without departing from the scope of the present invention, or equivalent embodiments can be modified based on the disclosed technical content. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention shall still fall within the protection scope of the present invention.

[0047] It should also be understood that, unless otherwise specified or indicated, the terms “first,” “second,” “third,” etc., in the specification are used only to distinguish the various components, elements, and steps in the specification, and not to indicate the logical or sequential relationships between the various components, elements, and steps.

[0048] Furthermore, it should be recognized that the terminology described herein is used only to describe particular embodiments and not to limit the scope of the invention. It must be noted that the singular forms “a” and “an” used herein and in the appended claims include plural bases unless the context clearly indicates otherwise. For example, a reference to “a step” or “an apparatus” means a reference to one or more steps or apparatuses, and may include secondary steps and secondary apparatuses. All conjunctions used should be understood in the broadest sense. Also, the word “or” should be understood to have the definition of logical “or” rather than logical “exclusive OR”, unless the context clearly indicates otherwise. Furthermore, implementation of the methods and / or devices in embodiments of the invention may include performing selected tasks manually, automatically, or in combination.

Claims

1. A pipe welding machine, characterized in that, include: A workbench, the workbench having a collection chamber, the workbench having a working groove, and the bottom of the working groove having a collection port communicating with the collection chamber; A clamping unit is disposed on the worktable, and the clamping unit is used to clamp the pipe; A welding unit is disposed on the workbench, the welding unit includes a welding head, the welding head being located above the working groove; A drive assembly is mounted on the worktable; A cleaning unit, which can move in the working tank under the drive of the drive assembly, to sweep the welding slag in the working tank into the collection port.

2. The pipe welding machine as described in claim 1, characterized in that, The drive assembly includes a power component and a guide component. The guide component includes a moving rod and a guide screw passing through the moving rod. The moving rod has a threaded hole that mates with the guide screw. The moving rod is connected to the cleaning unit. The power component can drive the guide screw to rotate, thereby moving the moving rod along the guide screw, and thus driving the cleaning unit to move in the working groove.

3. The pipe welding machine as described in claim 2, characterized in that, The guide screw is rotatably mounted in the working groove, and there is a gap between the moving rod and the bottom of the working groove. The power component includes a second motor, which is mounted on the worktable and connected to one end of the guide screw.

4. The pipe welding machine as described in claim 2, characterized in that, The cleaning unit includes a scraper connected to the moving rod and perpendicular to the guide screw. The scraper is used to clean the welding slag on the bottom surface of the working groove.

5. The pipe welding machine as described in claim 4, characterized in that, The cleaning unit includes a spring and a rotating rod assembly. The rotating rod assembly includes a rotating rod and a pull rope wound around the rotating rod. The scraper is connected to the moving rod via the spring. One end of the pull rope is connected to the rotating rod, and the other end of the pull rope is connected to the scraper. The rotating rod is rotatably mounted on the moving rod. The rotating rod is provided with a second gear. The side wall of the working groove is provided with a plurality of racks spaced apart along the moving direction of the moving rod, and the racks protrude from the side wall of the working groove, so that when the moving rod moves, the second gear can intermittently mesh with the plurality of racks, thereby driving the scraper to move relative to the moving rod.

6. The pipe welding machine as described in claim 5, characterized in that, There are two guide screws and two rotating rod assemblies. The two guide screws are located on opposite sides of the working groove and are parallel to each other. The rack is set on the side wall of the working groove corresponding to the guide screw. The two ends of the moving rod are threaded to one of the guide screws. The two rotating rod assemblies are located at the two ends of the moving rod and are used to intermittently mesh with the rack on the side wall of the corresponding working groove.

7. The pipe welding machine as described in claim 1, characterized in that, The clamping unit includes a first support frame, a second support frame, a first rotating cylinder, a second rotating cylinder, a fastening assembly, and a telescopic assembly. Both the first and second support frames are mounted on the worktable. The first rotating cylinder is rotatably mounted on the first support frame. The first rotating cylinder is connected to a pipe passing through it via the fastening assembly. The second rotating cylinder is connected to a pipe passing through it via the fastening assembly. The fixed end of the telescopic assembly is mounted on the second support frame, and the second rotating cylinder is rotatably mounted on the moving end of the telescopic assembly. The central axes of the first and second rotating cylinders are collinear. A gap is provided between the first and second rotating cylinders for connecting the pipe. The telescopic assembly can drive the second rotating cylinder to move axially, thereby adjusting the gap.

8. The pipe welding machine as described in claim 7, characterized in that, The clamping unit includes a first motor, which is mounted on the first support frame. A toothed ring is provided on the outer circumferential surface of the first rotating drum, and the first motor drives the first rotating drum to rotate through the toothed ring.

9. The pipe welding machine as described in claim 7, characterized in that, The first rotating drum has a first extension plate and a second extension plate at its end facing the second rotating drum. The fastening assembly includes a first clamping plate, a second clamping plate, an adjusting screw, and a guide rod. The first clamping plate and the second clamping plate are disposed between the first extension plate and the second extension plate, and are used to clamp the pipe between the first clamping plate and the second clamping plate. The adjusting screw passes through the first extension plate, the first clamping plate, the second clamping plate, and the second extension plate in sequence. One end of the guide rod is connected to the first extension plate, and the other end of the guide rod is connected to the second extension plate, and the guide rod passes through... The first clamping plate and the second clamping plate, the adjusting screw and the guide rod are parallel to each other and the distance between the adjusting screw and the guide rod is used for the passage of the pipe. The adjusting screw includes a first rod segment and a second rod segment. The direction of the thread on the first rod segment is opposite to the direction of the thread on the second rod segment. The first rod segment is threadedly connected to the first clamping plate and the second rod segment is threadedly connected to the second clamping plate. The end of the second rotating cylinder facing the first rotating cylinder is provided with a third extension plate and a fourth extension plate. Similarly, the fastening assembly is also provided between the third extension plate and the fourth extension plate.

10. The pipe welding machine as described in claim 1, characterized in that, The welding unit includes a height adjustment component and a welding component. The height adjustment component is mounted on the worktable. The welding component includes a rocker arm and a welding head mounted on the rocker arm. The rocker arm and the height adjustment component are hinged together. The height adjustment component can adjust the height of the welding component.

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