Laser-electric arc hybrid welding device for petroleum pipeline

Abstract

The invention discloses a laser-electric arc hybrid welding device for a petroleum pipeline. The laser-electric arc hybrid welding device comprises a portal frame, a driving unit and a welding unit, the portal frame is provided with a driving seat capable of sliding and adjusting along the horizontal direction, and one end of the driving unit is fixed with the driving seat; the welding unit is arranged on the driving unit and comprises two composite welding devices which are symmetrically distributed left and right; a riding wheel device is arranged at the position, located below the welding unit, of one side of the portal frame, and the two butt-joint pipelines are placed on the riding wheel device in a rolling mode.

Description

Technical Field

[0001] The invention belongs to the technical field of laser composite welding, in particular to a laser arc composite welding device for oil pipelines. Background Art

[0002] Oil pipelines are typically high-pressure and large-diameter, placing extremely high demands on welding quality. Traditional single welding methods struggle to meet these requirements in terms of penetration depth and width, and are prone to welding defects, impacting the safe operation of the pipeline. Laser arc hybrid welding, a technique currently in use, can effectively improve the mechanical properties and pressure resistance of the weld, ensuring the long-term safe operation of the pipeline under complex working conditions.

[0003] However, the laser arc hybrid welding devices in the existing technology usually adopt single-pass straight line welding, which has limited penetration depth and width, especially in thick-walled or large-diameter oil pipelines, and cannot meet the requirements of high strength and pressure resistance. In addition, the structure of the straight weld is relatively simple, which is prone to stress concentration under uneven force or complex working conditions, affecting the long-term reliability of the weld. Summary of the Invention

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a laser arc hybrid welding device for oil pipelines, comprising: a gantry, a driving unit and a welding unit;

[0005] A drive seat that slides and adjusts in the horizontal direction is installed on the gantry, and one end of the drive unit is fixed to the drive seat;

[0006] The welding unit is arranged on the driving unit, and the welding unit includes two composite welding devices that are symmetrically distributed on the left and right;

[0007] A supporting wheel device is provided on one side of the gantry and below the welding unit, and the two butt-jointed pipes are rolled and placed on the supporting wheel device.

[0008] Furthermore, preferably, the driving unit includes:

[0009] A lifting beam is vertically fixed to one end surface of the driving seat, and a moving beam is horizontally provided on one side of the lifting beam and slides vertically along its surface;

[0010] A positioning seat is horizontally slidably arranged on the moving beam, and an upper crossbeam parallel to the moving beam is fixed to the upper end of the positioning seat;

[0011] A positioning plate is mounted on the upper crossbeam, the positioning plate is connected to a vertically arranged machine plate via symmetrically arranged fixing frames, and the welding unit is mounted on the machine plate;

[0012] The control unit is mounted on the upper crossbeam.

[0013] Further, as a preference, a guide rail is fixed to one side of the upper crossbeam, the positioning plate is slidably connected to the guide rail, a fine adjustment cylinder is installed on the upper crossbeam, and the telescopic end of the fine adjustment cylinder is connected to the positioning plate;

[0014] A column is vertically slidably connected in the positioning plate, the upper end of the column is fixed to the fixing frame, a lifting cylinder is installed below the positioning plate, and the output end of the lifting cylinder is connected to the column.

[0015] Furthermore, preferably, two machine bases are symmetrically mounted on the positioning plate, a rotating shaft is rotatably connected inside the machine base, and each of the composite welding devices is fixed to one end of the rotating shaft.

[0016] Furthermore, preferably, the composite welding device comprises:

[0017] A machine housing, one side of which is fixed with a connecting frame, and an arc welding device is installed on the connecting frame;

[0018] A central shaft is vertically fixed to the lower end surface of the housing, a support is provided below the housing, and the central shaft is rotatably connected to the support via a bearing;

[0019] A laser welder is fixed obliquely on one end surface of the support.

[0020] Furthermore, as a preference, the arc welding device in each of the hybrid welding devices is located on the left or right side of the oil pipeline weld;

[0021] The inclination angle of the laser welder is 18°.

[0022] Furthermore, preferably, a laser channel is provided in the laser welder, a lens barrel is slidably connected in the laser channel, and a focusing lens is detachably mounted in the center of the lens barrel via a buckle;

[0023] A connecting groove is provided in the laser welder outside the laser channel, a shaft sleeve is slidably installed in the connecting groove, and a vertical sliding hole is provided on the side wall of the connecting groove. A guide pin is fixed on the outer wall of the lens barrel, and the guide pin is slidably connected to the sliding hole.

[0024] A guide groove is provided inside the shaft sleeve, and the end of the guide pin is slidably connected to the guide groove.

[0025] Furthermore, as a preference, a guide shaft is rotatably connected in the support, and one end of the guide shaft is connected to the central shaft for transmission through gear meshing;

[0026] A bevel gear is fixed to the other end of the guide shaft, and a gear ring is coaxially fixed to the outside of the shaft sleeve, and the bevel gear is meshed with the gear ring.

[0027] Furthermore, preferably, the unfolded profile of the guide groove is symmetrically distributed in an inverted V shape, and the guide groove is configured as a three-section structure, and is sequentially configured from the middle to the outside as a downward sloping section, a corrugated section, and a smooth section.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] In the present invention, for oil pipeline welding, two oil pipelines can be butt-welded first, fixed and rotated at a uniform speed by a supporting roller device, and then welding is performed by left-side arc welding or right-side arc welding according to the condition of the oil pipeline weld, and the laser welder can face the arc melting position of the weld, thereby realizing laser arc hybrid welding; wherein, the laser welder can be deflected forward and backward around the central axis through the support, and form an arc-shaped welding trajectory, so that in the oil pipeline hybrid welding process, the laser welder can form a continuous and uniform wavy welding trajectory at the weld, increase the weld depth and weld width, and improve the mechanical properties and pressure resistance of the weld, especially at the turning point of each wavy welding trajectory, the focusing mirror in the laser welder can fully vibrate vertically to form a deep-melting keyhole effect, thereby further increasing the weld depth near the turning point, and to a certain extent, preventing pores, slag inclusions, etc. in the weld, thereby enhancing the integrity and firmness of the weld. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 Schematic diagram of the structure of the drive unit in the present invention;

[0032] Figure 3 Schematic diagram of the structure of the composite welding device of the present invention;

[0033] Figure 4 A cross-sectional view of the internal structure of the composite welding device of the present invention;

[0034] Figure 5 Schematic diagram of the structure of the connecting groove in the present invention;

[0035] Figure 6 Schematic diagram of the structure of the lens barrel in the present invention;

[0036] Figure 7 Schematic diagram of the structure of the guide groove in the present invention;

[0037] Figure 8 This is a schematic diagram of the composite welding of pipeline welds in the present invention;

[0038] In the figure: 1. Gantry; 11. Drive seat; 12. Support roller device; 13. Machine base; 2. Drive unit; 21. Lifting beam; 22. Moving beam; 23. Positioning seat; 24. Upper crossbeam; 25. Positioning plate; 26. Fixing frame; 27. Machine plate; 28. Control unit; 29. Lifting cylinder; 3. Composite welding device; 31. Machine housing; 32. Connecting frame; 33. Arc welding device; 34. Central axis; 35. Support; 36. Guide shaft; 4. Laser welder; 41. Connecting groove; 42. Slide hole; 43. Bushing; 5. Lens barrel; 51. Focusing lens; 52. Retaining ring; 53. Guide pin; 6. Lower inclined section; 61. Corrugated section; 62. Stable section. DETAILED DESCRIPTION

[0039] See also Figure 1-Figure 5 In an embodiment of the present invention, a laser arc hybrid welding device for oil pipelines includes: a gantry 1, a driving unit 2 and a welding unit;

[0040] The gantry 1 is provided with a drive seat 11 that can be slidably adjusted in the horizontal direction. One end of the drive unit 2 is fixed to the drive seat 11, and a push wheel can be provided at the lower end of the gantry 1 to facilitate movement and transportation.

[0041] The welding unit is arranged on the driving unit 2, and the welding unit 3 includes two composite welding devices 3 that are symmetrically distributed on the left and right;

[0042] A roller device 12 is provided on one side of the gantry 1 below the welding unit, and the two butt-jointed pipes are rolled and placed on the roller device 2. It should be noted that the two butt-jointed pipes need to be manually spot-welded on their circumferences to make them neatly butt-jointed and fixed, and then workers place them on the roller device 2, which is self-driven by the roller device 2 to rotate the oil pipelines.

[0043] In this embodiment, the driving unit 2 includes:

[0044] A lifting beam 21 is vertically fixed to one end surface of the driving seat 11, and a moving beam 22 is horizontally provided on one side of the lifting beam 21 and slides vertically along its surface;

[0045] A positioning seat 23 is horizontally slidably disposed on the moving beam 22 , and an upper crossbeam 24 parallel to the moving beam 22 is fixed to the upper end of the positioning seat 23 ;

[0046] A positioning plate 25 is mounted on the upper crossbeam 24 . A vertically arranged machine plate 27 is connected to the positioning plate 25 via a symmetrically arranged fixing frame 26 . The welding unit 3 is mounted on the machine plate 27 .

[0047] The control unit 28 is mounted on the upper cross beam 24 . The control unit 28 can control the horizontal sliding adjustment of the positioning seat 23 along the moving beam 22 , and can also control the vertical displacement adjustment of the moving beam 22 relative to the lifting beam 21 .

[0048] As a preferred embodiment, a guide rail is fixed to one side of the upper crossbeam 24, and the positioning plate 25 is slidably connected to the guide rail. A fine-adjustment cylinder is installed on the upper crossbeam 24, and the telescopic end of the fine-adjustment cylinder is connected to the positioning plate 25; therefore, the fine-adjustment cylinder can perform horizontal sliding fine adjustment on the welding point of the composite welding device 3 during the subsequent welding process;

[0049] A column is vertically slidably connected inside the positioning plate 25, and the upper end of the column is fixed to the fixing frame 26. A lifting cylinder 29 is installed below the positioning plate 25, and the output end of the lifting cylinder 28 is connected to the column, so that the welding point of the composite welding device 3 can be vertically slid and fine-tuned during the subsequent welding process.

[0050] In this embodiment, two machine bases 13 are symmetrically assembled on the positioning plate 25, and a rotating shaft is rotatably connected inside the machine base 13. Each of the composite welding devices 3 is fixed to one end of the rotating shaft, so that the corresponding composite welding device 3 can be deflected around the rotating shaft by rotating the rotating shaft, which facilitates the adjustment of the inclination of the composite welding device 3 relative to the weld.

[0051] In this embodiment, the composite welding device 3 includes:

[0052] The machine housing 31 has a connecting frame 32 fixed to one side thereof, and an arc welding device 33 is mounted on the connecting frame 32;

[0053] The central shaft 34 is vertically fixed to the lower end surface of the housing 31. A support 35 is provided below the housing 31. The central shaft 34 is rotatably connected to the support 35 via a bearing.

[0054] The laser welder 4 is fixed obliquely on one side end face of the support 35. A control motor can be provided outside the machine housing 31, which can drive the support 35 to deflect forward and reverse through the meshing action of gears, thereby ensuring that the laser welder 4 deflects back and forth with the central axis 34 as the axis. Such a setting can form a continuous and uniform wavy welding trajectory at the butt weld of the oil pipeline, increase the penetration depth and width, make the weld denser, thereby significantly improving the mechanical properties and pressure resistance of the weld, especially in combination with the molten pool of arc welding, the overlapping area of the laser beam and the arc heat field is expanded, and the melt width is increased by 30%-50%.

[0055] In this embodiment, the arc welding device in each of the hybrid welding devices 3 is located on the left or right side of the oil pipeline weld. For example, when the arc welding device is located on the left side of the oil pipeline weld, it welds the weld at an angle. In this case, a shallow and wide molten pool can be formed on the right side of the weld, making it suitable for high-alloy pipes or pipes made of special materials that are heat-sensitive on the right side.

[0056] The inclination angle of the laser welder 4 is 18°.

[0057] As a preferred embodiment, the laser welder 4 is provided with a laser channel, a lens barrel 5 is slidably connected to the laser channel, and a focusing lens 51 is detachably mounted in the center of the lens barrel 5 via a buckle 52;

[0058] The laser welder 4 has a connecting groove 41 outside the laser channel, a shaft sleeve 43 is slidably mounted in the connecting groove 41, and a vertical sliding hole 42 is formed on the side wall of the connecting groove 41. A guide pin 53 is fixed to the outer wall of the lens barrel 5, and the guide pin 53 is slidably connected to the sliding hole 42; the focusing lens 51 in the lens barrel 5 can adjust the laser focal position as the lens barrel 5 slides up and down. When the focusing lens 51 moves downward, the focus of the laser will be closer to the workpiece surface, thereby reducing the spot diameter and increasing the power density, thereby forming a welding effect with deeper penetration or higher energy density;

[0059] A guide groove is defined inside the shaft sleeve 43 , and the end of the guide pin 53 is slidably connected to the guide groove, so that the shaft sleeve 43 can control the corresponding upward and downward sliding adjustment of the lens barrel 5 through the sliding action of the guide pin 53 and the guide groove under the action of rotation.

[0060] In this embodiment, a guide shaft 36 is rotatably connected in the support 35, and one end of the guide shaft 36 is connected to the central shaft 34 through gear meshing.

[0061] A bevel gear is fixed to the other end of the guide shaft 36, and a gear ring is coaxially fixed to the outside of the sleeve 43, and the bevel gear is meshed with the gear ring. The initial position of the laser welder 4 is kept in the same plane as the oil pipeline weld. At this time, the lens barrel 5 is above the inside of the laser channel. As the laser welder 4 deflects around the central axis 34, the lens barrel 5 inside it can move vertically downward along the laser channel through the sliding action of the guide groove on the sleeve 43 and the guide pin 53, thereby gradually enhancing the penetration depth of the laser welding molten pool, thereby enhancing the keyhole effect near the turning point of each wavy welding trajectory.

[0062] In this embodiment, the unfolded profile of the guide groove is symmetrically distributed in an inverted V shape, so that when the laser welder 4 deflects forward or reversely around the central axis 34, the lens barrel 5 inside it presents a uniform motion trajectory, and the guide groove is set to a three-section structure, and is sequentially set from the middle to the outside as a lower inclined section 6, a corrugated section 61 and a stable section 62, wherein when the guide pin 53 passes through the lower inclined section 6, the lens barrel 5 moves vertically downward along the laser channel, and when the guide pin 53 passes through the corrugated section 61, the lens barrel 5 can slide back and forth up and down, so that the focusing mirror 51 in the lens barrel 5 fully vibrates vertically near the turning point of the wavy welding trajectory, forming a deep melting keyhole effect, thereby further increasing the melting depth near the turning point position, and forming a stirring effect on the molten pool to a certain extent; and the stable section 62 is short in length, the guide pin 53 stagnates in the stable section 62, and the laser welder 4 stops deflecting at the same time.

[0063] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, can make equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. Oil pipeline laser arc hybrid welding device, characterized by: It includes: Gantry (1), drive unit (2) and welding unit; A drive seat (11) that is slidably adjusted in a horizontal direction is mounted on the gantry (1), and one end of the drive unit (2) is fixed to the drive seat (11); The welding unit is arranged on the driving unit (2), and the welding unit (3) comprises two composite welding devices (3) that are symmetrically distributed left and right; A supporting wheel device (12) is provided on one side of the gantry (1) below the welding unit, and the two butted pipes are rolled and placed on the supporting wheel device (2).

2. The oil pipeline laser arc hybrid welding device according to claim 1 is characterized in that: The driving unit (2) comprises: A lifting beam (21) is vertically fixed to one end surface of the driving seat (11), and a moving beam (22) is horizontally provided on one side of the lifting beam (21) and slides vertically along the surface thereof; A positioning seat (23) is horizontally slidably arranged on the moving beam (22), and an upper crossbeam (24) parallel to the moving beam (22) is fixed to the upper end of the positioning seat (23); A positioning plate (25) is mounted on the upper crossbeam (24); a vertically arranged machine plate (27) is connected to the positioning plate (25) via a symmetrically arranged fixing frame (26); and the welding unit (3) is mounted on the machine plate (27); A control unit (28) is mounted on the upper crossbeam (24).

3. The oil pipeline laser arc hybrid welding device according to claim 2 is characterized in that: A guide rail is fixed on one side of the upper crossbeam (24), the positioning plate (25) is slidably connected to the guide rail, a fine adjustment cylinder is installed on the upper crossbeam (24), and the telescopic end of the fine adjustment cylinder is connected to the positioning plate (25); A column is vertically slidably connected inside the positioning plate (25), the upper end of the column is fixed to the fixing frame (26), a lifting cylinder (29) is installed below the positioning plate (25), and the output end of the lifting cylinder (28) is connected to the column.

4. The oil pipeline laser arc hybrid welding device according to claim 2, characterized in that: Two machine bases (13) are symmetrically mounted on the positioning plate (25), a rotating shaft is rotatably connected inside the machine base (13), and each of the composite welding devices (13) is fixed to one end of the rotating shaft.

5. The oil pipeline laser arc hybrid welding device according to claim 1 is characterized in that: The composite welding device (3) comprises: A machine housing (31) has a connecting frame (32) fixed to one side thereof, and an arc welding device (33) is mounted on the connecting frame (32); A central shaft (34) is vertically fixed to the lower end surface of the housing (31); a support (35) is provided below the housing (31); and the central shaft (34) is rotatably connected to the support (35) via a bearing; The laser welder (4) is fixed obliquely on one end surface of the support (35).

6. The oil pipeline laser arc hybrid welding device according to claim 5, characterized in that: The arc welding device in each of the composite welding devices (3) is located on the left or right side of the oil pipeline weld; The inclination angle of the laser welder (4) is 18°.

7. The oil pipeline laser arc hybrid welding device according to claim 5, characterized in that: The laser welder (4) is provided with a laser channel, a lens barrel (5) is slidably connected to the laser channel, and a focusing lens (51) is detachably mounted at the center of the lens barrel (5) via a buckle (52); A connecting groove (41) is provided in the laser welder (4) outside the laser channel, a shaft sleeve (43) is slidably installed in the connecting groove (41), and a vertically arranged sliding hole (42) is provided on the side wall of the connecting groove (41), a guide pin (53) is fixed on the outer wall of the lens barrel (5), and the guide pin (53) is slidably connected to the sliding hole (42); A guide groove is provided inside the shaft sleeve (43), and the end of the guide pin (53) is slidably connected to the guide groove.

8. The oil pipeline laser arc hybrid welding device according to claim 7, characterized in that: A guide shaft (36) is rotatably connected in the support (35), and one end of the guide shaft (36) is connected to the central shaft (34) for transmission through gear meshing. A bevel gear is fixed to the other end of the guide shaft (36), and a gear ring is coaxially fixed to the outside of the shaft sleeve (43), and the bevel gear is meshed with the gear ring.

9. The oil pipeline laser arc hybrid welding device according to claim 8, characterized in that: The expanded profile of the guide groove is symmetrically distributed in an inverted V shape, and the guide groove is configured as a three-section structure, which is sequentially configured from the middle to the outside as a downward sloping section (6), a corrugated section (61), and a stable section (62).

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