Pipeline welding device

Abstract

The utility model discloses a pipeline welding device. The pipeline welding device comprises a shell, an open fluted disc, a driving motor and a transmission part, the transmission part is arranged between the driving motor and the open fluted disc, and the driving motor is in driving connection with the open fluted disc through the transmission part so as to drive the open fluted disc and a welding needle arranged on the open fluted disc to rotate, so that a pipeline is welded; the transmission part comprises a transmission assembly and a fluted disc driving gear, and the fluted disc driving gear is meshed with the opening fluted disc; wherein the driving motor is arranged in the shell. The pipeline welding device solves the problem that an existing pipeline welding device can generate interference under the condition that the welding space is narrow, so that welding equipment cannot be clamped.

Description

Technical Field

[0001] The utility model belongs to the technical field of automatic welding, and more specifically, relates to a pipeline welding device. Background Art

[0002] Automatic welding has developed into an advanced manufacturing technology. Automatic welding equipment plays an increasingly important role in various industrial applications, and its application scope is expanding rapidly. In modern industrial production, the mechanization and automation of the welding production process is an inevitable trend in the modernization of the welding mechanism manufacturing industry.

[0003] Existing pipe welding devices usually adopt an external drive motor, which results in a relatively large size of the pipe welding device and cannot be applied to situations where the welding space is relatively narrow. In situations where the welding space is relatively narrow, interference will occur, resulting in the inability to clamp the welding equipment. Utility Model Content

[0004] Aiming at the problem that the existing pipeline welding device will cause interference when the welding space is relatively narrow, resulting in the inability to clamp the welding equipment, the purpose of the utility model is to provide a pipeline welding device, the pipeline welding device comprises: a shell, an open toothed disc, a driving motor, and a transmission part; the transmission part is arranged between the driving motor and the open toothed disc, and the driving motor drives the open toothed disc through the transmission part to drive the open toothed disc and the welding needle arranged on the open toothed disc to rotate, so as to perform welding operations on the pipeline; the transmission part comprises a transmission assembly and a toothed disc driving gear, and the toothed disc driving gear is meshed with the open toothed disc; wherein the driving motor is arranged in the shell.

[0005] Furthermore, the transmission assembly includes: a first transmission gear, which is arranged at the output end of the driving motor; a transmission rod, which is connected to the toothed disk driving gear; a second transmission gear, which is arranged on the transmission rod; and a synchronous belt, which is connected to the first transmission gear and the second transmission gear; wherein the driving motor can drive the synchronous belt and the second transmission gear to rotate through the first transmission gear, thereby driving the transmission rod to rotate and transmitting the driving force to the toothed disk driving gear.

[0006] Furthermore, the transmission assembly also includes: a synchronous belt tensioning structure, which is arranged on the outside of the synchronous belt.

[0007] Furthermore, the pipeline welding device also includes: a clutch assembly, which is arranged between the first transmission gear and the output end of the drive motor; a clutch handle, which is arranged on the outside of the shell and connected to the side of the first transmission gear away from the output end of the drive motor; wherein, when the drive motor is turned off, the power transmitted from the output end of the drive motor to the transmission assembly can be cut off by pulling the clutch handle, so as to manually reset the open gear disc.

[0008] Furthermore, the clutch assembly includes: a first spline, arranged at the output end of the drive motor; a second spline, arranged on the mounting shaft of the first transmission gear, and cooperating with the first spline to realize power transmission or power cutoff between the drive motor and the first transmission gear.

[0009] Furthermore, the pipeline welding device also includes: a reset spring, which is arranged on the transmission rod; wherein, when the clutch handle is pulled, the first transmission gear can drive the synchronous belt, the second transmission gear and the transmission rod to move in a direction close to the clutch handle, and the reset spring is compressed; when the external force acting on the clutch handle is released, the reset elastic force of the reset spring can drive the transmission assembly to return to its initial position.

[0010] Furthermore, the pipeline welding device also includes: a bevel gear assembly, which is arranged between the transmission rod and the toothed disc driving gear; wherein the transmission rod drives the toothed disc driving gear to rotate through the bevel gear assembly.

[0011] Furthermore, the bevel gear assembly includes: a first bevel gear, which is arranged on the transmission rod; and a second bevel gear, which is fixedly connected to the toothed disc driving gear; wherein the first bevel gear is meshed with the second bevel gear to transmit the driving force at the transmission rod to the toothed disc driving gear.

[0012] Furthermore, the return spring is located on a side of the first bevel gear close to the clutch handle.

[0013] Furthermore, the pipeline welding device includes two transmission assemblies and two toothed disc driving gears; wherein the opening width of the open toothed disc is smaller than the gear spacing between the two toothed disc driving gears.

[0014] Furthermore, the housing is provided with a toothed disc sliding groove, and the open toothed disc rotates along the toothed disc sliding groove.

[0015] Furthermore, the pipeline welding device also includes: a plurality of rollers, which are arranged between the open toothed disc and the toothed disc sliding groove, and are used to reduce the friction force when the open toothed disc rotates in the toothed disc sliding groove.

[0016] Furthermore, the toothed disc drive gear includes a first drive gear and a second drive gear that are meshed with each other; the first drive gear is transmission-connected to the transmission assembly, and the second drive gear is meshed with the open toothed disc; wherein the opening width of the open toothed disc is smaller than the gear spacing between the two second drive gears.

[0017] Technical effects and advantages of the utility model:

[0018] 1. Existing pipe welding devices usually adopt the form of external drive motor, which makes the size of the pipe welding device relatively large and cannot be applied to the situation where the welding space is relatively narrow. By arranging the drive motor inside the shell, the structural design of the pipe welding device can be made more compact, and the size and space occupied by the pipe welding device can be reduced, so that the pipe welding device can be applied to welding scenes with narrow welding space, thereby improving the applicability of the pipe welding device.

[0019] 2. When the drive motor is built-in, compared with gear transmission, a transmission assembly is set to transmit the driving force of the drive motor to the toothed disc drive gear and the open toothed disc through belt transmission, which can reduce the thickness of the transmission part of the pipe welding device and make the pipe welding device thinner, thereby further improving the structural compactness and size of the pipe welding device when the drive motor is built-in, and further improving the applicability of the pipe welding device.

[0020] 3. By arranging a transmission rod to drive the toothed disc driving gear to rotate through the bevel gear assembly, the transmission stability and transmission efficiency between the transmission rod and the toothed disc driving gear can be ensured while realizing the clutch function. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a pipeline welding device provided by the present application;

[0022] Figure 2 yes Figure 1 Schematic diagram of the internal structure of the middle pipe welding device;

[0023] Figure 3 yes Figure 1 A schematic diagram of the internal structure of the middle pipe welding device from another perspective;

[0024] Figure 4 yes Figure 1 Specific transmission diagram of the middle pipeline welding device;

[0025] Figure 5 yes Figure 1 A schematic diagram of the structure of the middle pipe welding device from another perspective;

[0026] Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0027] In the figure:

[0028] 10. housing; 11. first housing; 12. second housing; 13. toothed disc slide;

[0029] 14. Roller; 15. Mounting opening; 20. Drive motor; 30. Transmission part; 40. Transmission assembly; 41. First transmission gear; 42. Second transmission gear; 43. Synchronous belt; 44. Transmission rod; 45. Synchronous belt pressure rod; 46. First bevel gear; 47. Second bevel gear; 48. Pressure block; 50. Toothed disc drive gear; 51. First drive gear; 52. Second drive gear; 60. Open toothed disc; 61. First slide groove; 70. Clutch assembly; 71. Clutch handle; 72. First spline; 73. Second spline; 74. Reset spring; 80. Hand-held part. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific purposes.

[0031] See also Figure 1 , which is a schematic diagram of the structure of a pipeline welding device provided by the utility model. Figures 1 to 6 , the pipeline welding device includes, for example, a housing 10, a driving motor 20, a transmission part 30 and an open toothed disc 60. The transmission part 30 is arranged between the driving motor 20 and the open toothed disc 60, and the driving motor 20 drives the open toothed disc 60 through the transmission part 30 to drive the open toothed disc 60 and the welding needle arranged on the open toothed disc 60 to rotate, so as to perform welding operation on the pipeline. For example, the housing 10 and the open toothed disc 60 are both provided with an installation opening 15 for accommodating the pipeline to be welded; when welding operation is performed on the pipeline to be welded, the welding part of the pipeline to be welded is located in the installation opening 15, and the driving motor 20 drives the open toothed disc 60 to rotate through the transmission part 30, thereby driving the welding needle arranged on the open toothed disc 60 to rotate through the open toothed disc 60, forming an annular weld at the welding part of the pipeline to be welded, and welding two sections of the pipeline to be welded together.

[0032] For example, the housing 10 includes a first housing 11 and a second housing 12. In a specific embodiment, the first housing 11 is a mounting base, the second housing 12 is a mounting cover, and a hand-held portion 80 is further provided on the second housing 12, and an operator can hold the hand-held portion 80 to perform welding operations.

[0033] Specifically, the drive motor 20 is disposed in the housing 10, and the transmission part 30 includes a transmission assembly 40 and a toothed disc drive gear 50. The toothed disc drive gear 50 is meshed with the open toothed disc 60, and the transmission assembly 40 transmits the driving force of the drive motor 20 to the toothed disc drive gear 50 and the open toothed disc 60 by belt transmission.

[0034] It is understandable that the existing pipe welding device usually adopts the form of external drive motor, which results in that the size of the pipe welding device is relatively large and cannot be applied to the situation where the welding space is relatively small. By arranging the drive motor 20 in the housing 10, the structural design of the pipe welding device can be made more compact, and the size and space occupied by the pipe welding device can be reduced, so that the pipe welding device can be applied to welding scenes with narrow welding space, thereby improving the applicability of the pipe welding device.

[0035] It should be noted that when the distance between the output shaft of the drive motor 20 and the gear drive gear 50 is the same, if the driving force of the drive motor 20 is transmitted to the gear drive gear 50 through gear transmission, due to the influence of the gear radius, the transmission part of the pipe welding device will be thicker or wider, thereby causing the overall size of the pipe welding device to be larger.

[0036] When the drive motor 20 is built-in, compared with gear transmission, a transmission assembly 40 is set to transmit the driving force of the drive motor 20 to the toothed disc drive gear 50 and the open toothed disc 60 through belt transmission, which can reduce the thickness of the transmission part of the pipe welding device and make the pipe welding device thinner, thereby further improving the structural compactness and size of the pipe welding device when the drive motor 20 is built-in, and further improving the applicability of the pipe welding device.

[0037] Furthermore, the transmission assembly 40 includes, for example, a first transmission gear 41, a second transmission gear 42, a synchronous belt 43, and a transmission rod 44. The first transmission gear 41 is disposed at the output end of the drive motor 20; the first transmission gear 41 is connected to the second transmission gear 42 via the synchronous belt 43, and the second transmission gear 42 is disposed on the transmission rod 44.

[0038] In a specific embodiment, the driving motor 20 rotates, which can drive the first transmission gear 41 to rotate; the first transmission gear 41 drives the second transmission gear 42 to rotate through the synchronous belt 43; the second transmission gear 42 drives the transmission rod 44 to rotate, thereby transmitting the driving force output by the driving motor 20 to the gear drive gear 50 and the open gear 60 through the transmission rod 44.

[0039] Furthermore, the transmission assembly 40 also includes: a synchronous belt tensioning structure. It is understandable that, since the belt drive is a flexible drive, as the use time of the belt drive system increases, the drive belt may become loose, which will cause the drive belt to slip and reduce the transmission efficiency. Therefore, it is necessary to tension the synchronous belt 43 to ensure the transmission efficiency and transmission stability of the transmission assembly 40. Since the distance between the drive motor 20 and the transmission rod 44 is constant, the center distance between the first transmission gear 41 and the second transmission gear 42 is not adjustable, and the synchronous belt 43 cannot be tensioned by adjusting the center distance, so it is necessary to add a synchronous belt tensioning structure.

[0040] Preferably, the synchronous belt tensioning structure is arranged on the outside of the synchronous belt 43. It should be noted that if the synchronous belt tensioning structure is arranged on the inside of the synchronous belt 43, the synchronous belt 43 will bulge outward, causing the transmission part of the pipe welding device to become thicker. By arranging the synchronous belt tensioning structure on the outside of the synchronous belt 43, the synchronous belt 43 can be prevented from bulging outward, thereby making the structure of the transmission assembly 40 more compact and the transmission part of the pipe welding device can be set thinner.

[0041] In a specific embodiment, the first transmission gear 41 is a driving wheel, the second transmission gear 42 is a driven wheel, and the synchronous belt tensioning structure is a pressure rod 45 arranged outside the synchronous belt 43. For example, the pressure rod 45 is arranged in the housing through a pressure block 48, and the transmission rod 44 is partially clamped on one side of the pressure block 48 to ensure the transmission stability of the transmission rod 44.

[0042] Furthermore, the pipeline welding device further includes, for example: a clutch assembly 70 and a clutch handle 71. The clutch assembly 70 is disposed between the first transmission gear 41 and the output end of the drive motor 20; the clutch handle 71 is disposed on the outside of the housing 10 and connected to a side of the first transmission gear 41 away from the output end of the drive motor 20. Pulling the clutch handle 71 can cut off the power transmission between the first transmission gear 41 and the output end of the drive motor 20, so as to manually reset the open toothed disc 60.

[0043] Specifically, the clutch assembly 70 includes, for example, a first spline 72 and a second spline 73. The first spline 72 is disposed at the output end of the drive motor 20, and the second spline 73 is disposed on the mounting shaft of the first transmission gear 41. The first spline 72 and the second spline 73 cooperate to achieve power transmission and power cutoff between the first transmission gear 41 and the drive motor 20.

[0044] Furthermore, the pipeline welding device further includes, for example: a return spring 74 . The return spring 74 is disposed on the transmission rod 44 . When the clutch handle 71 is pulled, the clutch handle 71 can drive the first transmission gear 41 to move in the direction away from the output end of the drive motor 20, so that the first spline 72 and the second spline 73 are separated, cutting off the power transmission between the first transmission gear 41 and the output end of the drive motor 20; when the first transmission gear 41 moves in the direction away from the output end of the drive motor 20, the second spline 73, the second transmission gear 42, the synchronous belt 43, and the transmission rod 44 will all move in the direction away from the output end of the drive motor 20. At this time, the return spring 74 is compressed, and the first spline 72 and the second spline 73 are separated; when the force acting on the clutch handle 71 disappears, the return elastic force of the return spring 74 can drive the transmission rod 44 to return to its initial position. When the transmission rod 44 is reset, the second transmission gear 42, the synchronous belt 43, the first transmission gear 41, the second spline 73, and the clutch handle 71 are all reset, and the first spline 72 and the second spline 73 are meshed.

[0045] It should be noted that after the welding operation is completed, if there is no clutch assembly 70, the open toothed disc 60 needs to be driven to reset by the drive motor 20. After the clutch assembly 70 is set, the power transmission between the first transmission gear 41 and the drive motor 20 can be cut off by the clutch assembly 70, and the open toothed disc 60 can be reset manually, which is more convenient and energy-saving.

[0046] Furthermore, the pipeline welding device further includes, for example: a bevel gear assembly, wherein the bevel gear assembly is arranged between the transmission rod 44 and the toothed disc driving gear 50, and the transmission rod 44 drives the toothed disc driving gear 50 to rotate through the bevel gear assembly.

[0047] It should be noted that when the clutch handle 71 is pulled, the first transmission gear 41, the second transmission gear 42, the synchronous belt 43, and the transmission rod 44 will move along the axial direction of the transmission rod 44. If a worm gear structure is used for transmission between the transmission rod 44 and the toothed disc drive gear 50, the transmission rod 44 will be unable to move, or the worm gear structure will have slipping teeth when the transmission rod 44 moves. By setting the transmission rod 44 to drive the toothed disc drive gear 50 to rotate through the bevel gear assembly, the transmission stability and transmission efficiency between the transmission rod 44 and the toothed disc drive gear 50 can be ensured while realizing the clutch function.

[0048] Specifically, the bevel gear assembly includes a first bevel gear 46 and a second bevel gear 47. The first bevel gear 46 is arranged on the transmission rod 44, the second bevel gear 47 is fixedly connected to the toothed disc driving gear 50, and the first bevel gear 46 and the second bevel gear 47 are meshed with each other; when the transmission rod 44 rotates, the first bevel gear 46 can be driven to rotate, the first bevel gear 46 drives the second bevel gear 47 meshed with it to rotate, and the second bevel gear 47 drives the toothed disc driving gear 50 fixedly connected with it to rotate. When the transmission rod 44 moves axially, the first bevel gear 46 and the second bevel gear 47 are always in meshing state, and there will be no slipping between the first bevel gear 46 and the second bevel gear 47.

[0049] Preferably, the return spring 74 is located on the side of the first bevel gear 46 close to the clutch handle 71. The toothed disc drive gear 50 includes a first drive gear 51 and a second drive gear 52 that are meshed with each other. The first drive gear 51 is fixedly connected to an end of the second bevel gear 47 away from the first bevel gear 46, and the second drive gear 52 is meshed with the open toothed disc 60. It can be understood that, compared with setting a large toothed disc drive gear 50, setting the toothed disc drive gear 50 in the form of two meshed first drive gears 51 and second drive gears 52 can reduce the space occupied by the toothed disc drive gear 50, making the transmission structure more compact.

[0050] Furthermore, the pipeline welding device includes two transmission assemblies 40 and two sets of toothed disc drive gears 50. The opening width of the open toothed disc 60 is smaller than the gear spacing of the two second drive gears 52, so as to ensure that the open toothed disc 60 will not fall off during the rotation of the open toothed disc 60, and the meshing state of the open toothed disc 60 and the second drive gear 52 can always be maintained.

[0051] Preferably, the toothed disc drive gear 50 includes, for example, a meshing first drive gear 51 and a second drive gear 52. By configuring the toothed disc drive gear 50 as two meshing gears instead of using a large gear, the size of the pipe welding device can be reduced, making the structure of the pipe welding device more compact.

[0052] Furthermore, the housing 10 is provided with a toothed disc slide groove 13, and the open toothed disc 60 rotates along the toothed disc slide groove 13. The toothed disc slide groove 13 can limit and guide the rotation direction of the open toothed disc 60, ensure the rotation stability of the open toothed disc 60, so that the open toothed disc 60 can drive the welding needle arranged on the open toothed disc 60 to rotate smoothly, form a high-quality annular weld at the welding position of the pipeline to be welded, and improve the welding quality.

[0053] Furthermore, a plurality of rollers 14 are provided between the open toothed disc 60 and the toothed disc slide groove 13. When the open toothed disc 60 rotates along the toothed disc slide groove 13, the rollers 14 can convert the sliding friction between the open toothed disc 60 and the toothed disc slide groove 13 into rotational friction, thereby reducing the friction between the open toothed disc 60 and the toothed disc slide groove 13 when the open toothed disc 60 rotates in the toothed disc slide groove 13, so that the open toothed disc 60 rotates more smoothly in the toothed disc slide groove 13, thereby ensuring that the welding pins arranged on the open toothed disc 60 rotate more smoothly, forming a high-quality annular weld at the welding point of the pipeline to be welded, and improving the welding quality.

[0054] Among them, multiple rollers 14 can be installed on the toothed disc groove 13 or on the open toothed disc 60. As long as the rollers 14 can convert the sliding friction between the open toothed disc 60 and the toothed disc groove 13 into rotational friction, the specific setting position is not limited.

[0055] Preferably, a plurality of rollers 14 are rotatably arranged on the inner wall of the toothed disc slot 13, and a first slot 61 is provided on a side of the open toothed disc 60 close to the rollers 14; when the open toothed disc 60 rotates, the rollers 14 roll along the inner wall of the first slot 61. For example, a plurality of rotating shafts are evenly arranged on the inner wall of the toothed disc slot 13, and the rollers 14 are rotatably mounted on the rotating shafts.

[0056] In the description of the present invention, it is necessary to understand that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0057] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the field unless otherwise specified and limited.

Claims

1. A pipeline welding device, characterized in that: The pipeline welding device comprises: a housing (10), an open toothed disc (60), a driving motor (20), and a transmission part (30); the transmission part (30) is arranged between the driving motor (20) and the open toothed disc (60); the driving motor (20) is connected to the open toothed disc (60) through the transmission part (30) to drive the open toothed disc (60) and the welding needle arranged on the open toothed disc (60) to rotate, so as to perform a welding operation on the pipeline; the transmission part (30) comprises a transmission assembly (40) and a toothed disc driving gear (50); the toothed disc driving gear (50) is meshed with the open toothed disc (60); wherein the driving motor (20) is arranged in the housing (10).

2. The pipe welding device according to claim 1, characterized in that: The transmission assembly (40) comprises: A first transmission gear (41) is arranged at the output end of the driving motor (20); A transmission rod (44) drivingly connected to the toothed disc driving gear (50); A second transmission gear (42) is arranged on the transmission rod (44); A synchronous belt (43) for transmission connection between the first transmission gear (41) and the second transmission gear (42); The driving motor (20) can drive the synchronous belt (43) and the second transmission gear (42) to rotate via the first transmission gear (41), thereby driving the transmission rod (44) to rotate and transmitting the driving force to the toothed disc driving gear (50).

3. The pipe welding device according to claim 2, characterized in that: The pipeline welding device also includes: A clutch assembly (70) is arranged between the first transmission gear (41) and an output end of the drive motor (20); A clutch handle (71) is arranged outside the housing (10) and connected to a side of the first transmission gear (41) away from an output end of the drive motor (20); When the drive motor (20) is turned off, the clutch handle (71) can be pulled to cut off the power transmitted from the output end of the drive motor (20) to the transmission assembly (40), so as to manually reset the open toothed disc (60).

4. The pipe welding device according to claim 3, characterized in that: The clutch assembly (70) comprises: A first spline (72) is arranged at the output end of the drive motor (20); The second spline (73) is arranged on the mounting shaft of the first transmission gear (41) and cooperates with the first spline (72) to realize power transmission or power cutoff between the drive motor (20) and the first transmission gear (41).

5. The pipe welding device according to claim 3, characterized in that: The pipeline welding device also includes: A return spring (74) is arranged on the transmission rod (44); When the clutch handle (71) is pulled, the first transmission gear (41) can drive the synchronous belt (43), the second transmission gear (42) and the transmission rod (44) to move in a direction close to the clutch handle (71), and the reset spring (74) is compressed; when the external force acting on the clutch handle (71) is released, the reset elastic force of the reset spring (74) can drive the transmission assembly (40) to return to an initial position.

6. The pipe welding device according to claim 5, characterized in that: The pipeline welding device also includes: A bevel gear assembly is arranged between the transmission rod (44) and the toothed disc drive gear (50); Wherein, the transmission rod (44) drives the toothed disc driving gear (50) to rotate through the bevel gear assembly.

7. The pipe welding device according to claim 6, characterized in that: The bevel gear assembly comprises: A first bevel gear (46) is arranged on the transmission rod (44); A second bevel gear (47) fixedly connected to the toothed disc driving gear (50); The first bevel gear (46) is meshed with the second bevel gear (47) to transmit the driving force at the transmission rod (44) to the toothed disc driving gear (50).

8. The pipe welding device according to claim 7, characterized in that: The return spring (74) is located on a side of the first bevel gear (46) close to the clutch handle (71).

9. The pipe welding device according to claim 2, characterized in that: The transmission assembly (40) further comprises: The synchronous belt tensioning structure is arranged on the outside of the synchronous belt (43).

10. The pipeline welding device according to any one of claims 1 to 9, characterized in that: The housing (10) is provided with a toothed disc sliding groove (13), and the open toothed disc (60) rotates along the toothed disc sliding groove (13).

11. The pipe welding device according to claim 10, characterized in that: The pipeline welding device also includes: A plurality of rollers (14) are arranged between the open toothed disc (60) and the toothed disc sliding groove (13) and are used to reduce the friction force when the open toothed disc (60) rotates in the toothed disc sliding groove (13).

12. The pipeline welding device according to any one of claims 1 to 9, characterized in that: The pipeline welding device comprises two transmission assemblies (40) and two toothed disc driving gears (50); wherein the opening width of the open toothed disc (60) is smaller than the gear spacing of the two toothed disc driving gears (50).

13. The pipe welding device according to claim 12, characterized in that: The toothed disc driving gear (50) comprises a first driving gear (51) and a second driving gear (52) which are meshed with each other; the first driving gear (51) is drivingly connected to the transmission assembly (40), and the second driving gear (52) is meshed with the open toothed disc (60); wherein the opening width of the open toothed disc (60) is smaller than the gear spacing between the two second driving gears (52).

Images