CN117415417A - Deep water vertical pipe J-type paving transverse welding device and welding method based on rotary electric arc - Google Patents
Deep water vertical pipe J-type paving transverse welding device and welding method based on rotary electric arc Download PDFInfo
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- CN117415417A CN117415417A CN202311601158.XA CN202311601158A CN117415417A CN 117415417 A CN117415417 A CN 117415417A CN 202311601158 A CN202311601158 A CN 202311601158A CN 117415417 A CN117415417 A CN 117415417A
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- 238000003466 welding Methods 0.000 title claims abstract description 262
- 238000000034 method Methods 0.000 title claims abstract description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 238000010891 electric arc Methods 0.000 title claims abstract description 16
- 230000008569 process Effects 0.000 claims description 49
- 230000007246 mechanism Effects 0.000 claims description 22
- 238000001125 extrusion Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 239000002184 metal Substances 0.000 abstract description 14
- 229910052751 metal Inorganic materials 0.000 abstract description 14
- 238000003756 stirring Methods 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 13
- 230000009471 action Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
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Abstract
The invention provides a deep water vertical pipe J-shaped paving transverse welding device and a welding method based on a rotating arc, and relates to the technical field of welding equipment. The device includes guide rail, welding trolley and rotatory arc welder, the guide rail is connected on the trunk line, welding trolley and guide rail swing joint and can remove along the circumferencial direction of trunk line relatively the guide rail, rotatory arc welder connects on the welding trolley and can with welding trolley simultaneous movement, rotatory arc welder starts the back and can treat the welding operation of waiting to weld the groove on welding pipeline and the trunk line along the circumferencial direction of trunk line, through adopting rotatory electric arc to carry out the pipeline welding, compare in 2G swing electric arc horizontal welding technology, rotatory electric arc's rotation frequency is higher, can effectively solve the defect that lateral wall does not fuse about the groove, rotatory electric arc can also stir the molten bath, the molten bath cooling is accelerated, make molten metal and organizational quality even, thereby reach the purpose that improves the welding seam shaping.
Description
Technical Field
The invention relates to the technical field of welding equipment, in particular to a deep water vertical pipe J-type paving transverse welding device and a welding method based on a rotating arc.
Background
The submarine oil gas pipeline is connected through a plurality of sections of steel pipes with the same standard size according to the actual working condition and a specific welding process, and finally, the proper submarine oil gas pipeline laying mode is selected according to different water depths of the laid pipelines. For the laying of deep water submarine pipelines, a J-shaped pipe laying mode is commonly adopted.
The applicant found that at least the following technical problems exist in the prior art: under the corresponding working condition of the J-shaped pipe laying mode, the 2G swing arc transverse welding process is generally adopted for welding in the prior art, the problems that molten metal falls down under the action of gravity, the upper side wall and the lower side wall of a groove are not fused, the molten metal and the structure performance are uneven, the joint morphology is discontinuous and the like can occur, and the service life of the laid submarine oil-gas pipeline is seriously influenced.
Disclosure of Invention
The invention aims to provide a rotary arc-based deep water riser J-shaped laying transverse welding device and a welding method, which are used for solving the technical problems that a J-shaped pipe laying mode in the prior art adopts a 2G swing arc transverse welding process for welding, and the upper side wall and the lower side wall of a groove are not fused, molten metal and organization performance are uneven and joint morphology is discontinuous. The preferred technical solutions of the technical solutions provided by the present invention can produce a plurality of technical effects described below.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the utility model provides a horizontal welding set is laid to deep water riser J type based on rotatory electric arc, includes guide rail, welding dolly and rotatory electric arc welder, the guide rail is connected on the trunk line, the welding dolly with guide rail swing joint and can be relative the guide rail is followed the circumferencial direction of trunk line removes, rotatory electric arc welder connects on the welding dolly and can with welding dolly synchronous motion, rotatory electric arc welder starts the back can be followed wait to weld the circumference direction of trunk line and wait to weld the groove on the trunk line and weld the operation.
Preferably, the guide rail comprises a rigid semicircular track, a quick locking mechanism and a swallow-wing-shaped spring locking mechanism, wherein the two rigid semicircular tracks are connected through the two quick locking mechanisms and form an annular structure, the swallow-wing-shaped spring locking mechanisms are connected to the inner wall of the rigid semicircular track, and the swallow-wing-shaped spring locking mechanisms are in extrusion contact with the main pipeline so that the guide rail is connected to the outer wall of the main pipeline in a clamping mode.
Preferably, the welding carriage comprises a base module, a walking module, a locking module, a vertical adjusting module, a clamping module and a horizontal adjusting module, wherein the walking module is connected to the base module and movably connected with the guide rail, the locking module is connected to the base module and is in locking fit with the guide rail, the vertical adjusting module is connected to the base module, the horizontal adjusting module is respectively connected with the vertical adjusting module and the clamping module, the rotary arc welding gun is clamped and connected to the clamping module, the vertical adjusting module can drive the horizontal adjusting module, the clamping module and the rotary arc welding gun to move along the axial direction of the pipeline to be welded, and the horizontal adjusting module can drive the clamping module and the rotary arc welding gun to move along the radial direction of the pipeline to be welded.
Preferably, a welding power source is also included, the welding power source being connected to the rotating arc welding gun.
Preferably, the rotary arc welding gun further comprises a wire feeding unit, and the wire feeding unit is mechanically connected with the rotary arc welding gun.
Preferably, the welding device further comprises a control system, wherein the control system is electrically connected with the welding trolley, the rotary arc welding gun, the welding power supply and the wire feeding unit respectively.
A welding method comprising the steps of:
s1, assembling a main pipeline and a pipeline to be welded;
s2, performing pre-welding treatment on the groove to be welded;
s3, installing a guide rail on the main pipeline, and assembling a welding trolley on the guide rail;
s4, preheating the main pipeline and the pipeline to be welded;
s5, matching the welding process parameters of the STT primer layer with the rotary arc welding gun, and driving the rotary arc welding gun to move on the guide rail along the circumferential direction of the pipeline to be welded by the rotary arc welding gun, so that the primer layer is welded on the groove to be welded by the rotary arc welding gun;
s6, matching welding process parameters of MAG filling layers by a rotary arc welding gun, wherein the welding trolley drives the rotary arc welding gun to move on the guide rail along the circumferential direction of the pipeline to be welded, and the rotary arc welding gun welds at least one filling layer on the groove to be welded;
s7, the rotary arc welding gun is matched with welding process parameters of the MAG covering layer, the welding trolley drives the rotary arc welding gun to move on the guide rail along the circumferential direction of the to-be-welded pipeline, and the rotary arc welding gun welds the covering layer on the to-be-welded groove.
Preferably, the main pipe and the pipe to be welded are assembled in the step S1, including adopting an internal riser mouth aligner or an external riser mouth aligner for pipe assembly.
Preferably, the J-shaped groove is subjected to pre-welding treatment in the step S2, which comprises polishing the upper and lower sides of the groove to be welded in a range of 15-20mm and removing impurities.
Preferably, in step S3, preheating the main pipe and the pipe to be welded includes preheating the groove to be welded and the periphery within a range of 30-50 mm.
The beneficial effects of the invention are as follows: compared with a 2G swing arc transverse welding process, the rotating frequency of the rotating arc is higher, the rotating arc-based deep water vertical pipe J-type paving transverse welding device can easily reach more than tens of hertz, and the defect that the upper side wall and the lower side wall of a groove are not fused can be effectively overcome;
in the welding process, the rotating arc can stir the molten pool through the rotating characteristic, change the heat distribution in the molten pool, accelerate the cooling of the molten pool, and lead the molten metal and the tissue performance to be uniform, thereby achieving the purpose of improving the weld joint formation;
the quality of the vertical pipe transverse girth welding pipe joint completed by the rotary arc-based deep water vertical pipe J-shaped paving transverse welding device meets various relevant standard requirements, the welding seam is attractive in appearance and high in welding efficiency, the service life of paved submarine oil and gas pipelines can be effectively guaranteed, the application of welding process specifications of automatic pipeline welding on deep water and ultra-deep water submarine pipeline paving can be enriched, and a new solution is provided for the deep water and ultra-deep submarine oil and gas pipeline paving welding process.
According to the welding method, the actual welding operation can be carried out according to the optimal welding scheme and technological parameter combination of each layer of the welding seam by adopting a bottoming scheme of single-sided welding and double-sided forming of a rotary arc STT, a filling scheme of a rotary arc MAG and a covering scheme of the rotary arc MAG.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of a rotary arc-based deep water riser J-lay cross welding device of the present invention;
FIG. 2 is a block diagram of the welding carriage of the present invention;
FIG. 3 is a block diagram of a guide rail of the present invention;
FIG. 4 is an exemplary view of a bevel form of a pipe to be welded according to the present invention;
1, a guide rail; 11. a rigid semicircular track; 12. a quick lock mechanism; 13. a dovetail-shaped spring locking mechanism;
2. welding trolley; 21. a base module; 22. a walking module; 23. a locking module; 24. a vertical adjustment module; 25. a clamping module; 26. a level adjustment module;
3. rotating an arc welding gun;
4. a pipe to be welded;
5. and a main pipeline.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.
In the description of the present invention, it should be understood that the terms "center", "side", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side", etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in fig. 1 are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
Example 1
Referring to fig. 1 to 4, the invention provides a deep water riser J-type paving transverse welding device based on a rotary arc, which comprises a guide rail 1, a welding trolley 2 and a rotary arc welding gun 3, wherein the guide rail 1 is connected to a main pipeline 5, the welding trolley 2 is movably connected with the guide rail 1 and can move along the circumferential direction of the main pipeline 5 relative to the guide rail 1, the rotary arc welding gun 3 is connected to the welding trolley 2 and can synchronously move with the welding trolley 2, and after the rotary arc welding gun 3 is started, welding operation can be carried out on a pipeline 4 to be welded and a groove to be welded on the main pipeline along the circumferential direction of the main pipeline 5.
The rotary arc welding gun 3 can realize rotary arc welding, the rotary arc welding gun 3 specifically generates driving force through direct driving of a hollow cup motor to drive a conical swing rod to finish high-speed rotation of welding wires, the rotary arc welding gun 3 adopted in the embodiment preferably has eight rotary diameter adjustment scales, the rotary diameter, the rotary speed and the rotary direction of the rotary arc welding gun can be adjusted according to requirements, and the rotary direction refers to clockwise direction or anticlockwise direction.
The application of the rotary arc in transverse welding has the main advantages that the rotation direction of the lower side wall is consistent with the welding direction, the stirring of a molten pool is increased, the upper side wall of molten metal is cooled, the weld joint forming with flat upper and lower side walls is formed, and the falling trend of the molten metal is counteracted or weakened;
compared with the swing arc which needs to set the residence time, swing speed and swing width of the upper and lower side walls, the rotating arc can finish the setting of welding process parameters only by setting the rotating direction and the rotating frequency, and welding is performed, and the higher rotating frequency can increase the welding seam forming quality;
the rotating frequency of the rotating arc is high, the window of welding process specifications is correspondingly increased, and the applicable welding speed and wire feeding speed range is wider.
When proper rotation parameters are selected, the temperature of molten pool metal is reduced when no rotation is performed, the temperature of the side wall of the groove is increased, so that the high-temperature holding time of the molten pool metal is reduced, the surface tension is relatively high, and the forming of a welding seam of transverse welding is facilitated;
on the other hand, because relatively more heat is distributed to the groove side wall area, the side wall penetration of the welding joint is favorably improved, and excellent weld formation is obtained, and the arc force and the droplet impact force periodically act on each area in the groove due to the rotation of the arc, so that finger penetration generated by the fixing action of the arc force and the droplet impact force on the center of the groove in the traditional welding is eliminated.
Secondly, under the periodical action of a rotating arc, the molten pool metal is oscillated in the width direction of the welding seam, and the oscillation can promote the metal accumulated on the lower side wall to move towards the upper side wall, so that the filling of a base metal melting area near the upper side wall is facilitated, and the action cannot be achieved in the traditional welding process;
under the condition that other parameters are unchanged, the melting range on the two side walls is increased due to the rotation of the electric arc, so that under the same technological parameters, compared with the traditional transverse welding process, the rotary electric arc process can promote to improve the collapse and the convex defects of a molten pool.
Compared with a 2G swing arc transverse welding process, the rotary arc has obvious advantages, the rotary arc has higher rotation frequency, can easily reach more than tens of hertz, and can effectively solve the problems of unfused upper and lower side walls of a groove and the like;
in the welding process, the rotating arc can stir the molten pool through the rotating characteristic, change the heat distribution in the molten pool, accelerate the cooling of the molten pool, and lead the molten metal and the tissue performance to be uniform, thereby achieving the purpose of improving the weld joint formation;
the quality of the vertical pipe transverse girth welding pipe joint completed by the rotary arc-based deep water vertical pipe J-shaped paving transverse welding device meets various relevant standard requirements, the welding seam is attractive in appearance and high in welding efficiency, the service life of paved submarine oil and gas pipelines can be effectively guaranteed, the application of welding process specifications of automatic pipeline welding on deep water and ultra-deep water submarine pipeline paving can be enriched, and a new solution is provided for the deep water and ultra-deep submarine oil and gas pipeline paving welding process.
As an alternative embodiment, the guide rail 1 comprises a rigid semicircular track 11, a quick locking mechanism 12 and a swallow-wing-shaped spring locking mechanism 13, the rigid semicircular track 11 is a rigid guide rail, has the characteristics of stable installation and difficult deformation, can realize stable running and accurate positioning of the welding trolley 2, the two rigid semicircular tracks 11 are connected through the two quick locking mechanisms 12 and form an annular structure, the annular structure can be matched with the appearance of the main pipeline 5, and the quick locking mechanism 12 is used for quickly installing the rigid semicircular track 11 on the main pipeline 5;
the dovetail-shaped spring locking mechanisms 13 are connected to the inner wall of the rigid semicircular track 11, and the dovetail-shaped spring locking mechanisms 13 are in extrusion contact with the main pipeline 5 so that the guide rail 1 is connected to the outer wall of the main pipeline 5 in a clamping mode, and the dovetail-shaped spring locking mechanisms 13 can be used for adjusting the clamping force between the rigid semicircular track 11 and the main pipeline 5;
the structure and principle of use of the rigid semicircular track 11, the quick lock mechanism 12 and the dovetail-shaped spring lock mechanism 13 are conventional, and therefore will not be described further.
As an alternative embodiment, the welding trolley 2 comprises a base module 21, a walking module 22, a locking module 23, a vertical adjusting module 24, a clamping module 25 and a horizontal adjusting module 26, wherein the walking module 22 is connected to the base module 21 and is movably connected with the guide rail 1, preferably, racks are machined on the surface of the rigid semicircular track 11, a driving gear and a servo motor for driving the driving gear to rotate are preferably arranged on the walking module 22, the servo motor can strictly control the external dimension, so that pipeline welding in a narrow space can be realized, the driving gear can be meshed with the racks on the rigid semicircular track 11, the welding trolley 2 can be driven to move relative to the guide rail 1 after the driving gear rotates, and the welding trolley 2 can move relative to the guide rail 1 along the circumferential direction of the pipeline 4 to be welded due to the annular arrangement of the guide rail 1;
the locking module 23 is connected to the base module 21 and is in locking fit with the guide rail 1, the locking module 23 preferably adopts a combined structure of a locking wheel and a spring, and the spring drives the locking wheel to move, so that a limit is formed between the welding trolley 2 and the guide rail 1, and the welding trolley 2 can only move along the circumferential direction of the pipeline 4 to be welded relative to the guide rail 1;
the vertical adjusting module 24 is connected to the base module 21, the horizontal adjusting module 26 is respectively connected with the vertical adjusting module 24 and the clamping module 25, and the rotary arc welding gun 3 is clamped and connected to the clamping module 25;
the vertical adjustment module 24 can drive the horizontal adjustment module 26, the clamping module 25 and the rotary arc welding gun 3 to move along the axial direction of the pipe 4 to be welded, and in the welding process, the swinging width of the welding seam can be controlled through the adjustment movement of the vertical adjustment module 24, the essence of the swinging movement is that the clockwise and anticlockwise rotary movement of the servo motor is converted into reciprocating linear movement, and the swinging reciprocating stroke is preferably 0-50mm;
the horizontal adjustment module 26 can drive the clamping module 25 and the rotating arc welding gun 3 to move along the radial direction of the pipe 4 to be welded, so that when the corresponding bottoming layer, the filling layer and the covering layer are welded respectively, the actual positions of the rotating arc welding gun 3 moving along the radial direction of the pipe 4 to be welded can be adjusted by the horizontal adjustment module 26 so as to correspond to different positions of the bottoming layer, the filling layer and the covering layer respectively, in the implementation, the vertical adjustment module 24 can carry out actual position adjustment by being provided with a servo motor, the adjustment range is preferably 0-50mm, the position precision is +/-0.5 mm, and the structures and the use principles of the base module 21, the walking module 22, the locking module 23, the vertical adjustment module 24, the clamping module 25 and the horizontal adjustment module 26 are all of a more conventional prior art, so that no further development description is made.
As an optional embodiment, a welding power source is further included, the welding power source is connected with the rotating arc welding gun 3, in this embodiment, the welding power source is preferably a fully-digital MAG-350RPL type welding power source manufactured by shandong, and such welding power source can be matched according to the STT welding process parameters and the MAG welding process parameters, so that the bottom layer, the filling layer and the cover layer can be respectively welded.
As an alternative embodiment, the welding wire feeding device further comprises a wire feeding unit, wherein the wire feeding unit is mechanically connected with the rotary arc welding gun 3, the wire feeding unit can provide welding wires for the rotary arc welding gun 3, and the structure and the use principle of the wire feeding unit are conventional, so that the wire feeding unit is not further described in the prior art.
As an optional implementation manner, the welding device further comprises a control system, the control system is respectively and electrically connected with the welding trolley 2, the rotary arc welding gun 3, the welding power supply and the wire feeding unit, the control system can be electrically connected with the walking module 22, the locking module 23, the vertical adjusting module 24 and the horizontal adjusting module 26 on the welding trolley 2, the control system can be matched with corresponding welding parameters according to the bottoming layer, the filling layer and the covering layer, and the control system can generate corresponding control signals according to the welding parameters and transmit the corresponding control signals to other module units, so that the smooth completion of welding operation is assisted, and the structure and the corresponding control principle of the control system are all of a more conventional prior art, so that no further development description is made.
In this embodiment, the rotating arc welding gun 3 and the welding carriage 2 may be integrated, and in cooperation with the handheld controller of the rotating arc welding gun 3, parameters such as the rotation frequency, the rotation radius, the rotation direction and the like may be adjusted in real time during the welding test process, so as to ensure stability of the welding pool and quality of the welding seam, and technical parameters of the rotating arc welding gun 3 applied in this embodiment are shown in the following table 1:
table 1 technical parameters of rotary arc welding gun
| Category(s) | Parameters (parameters) |
| Maximum current intensity (A) | 400 |
| Input voltage (V) | 110-240 |
| Diameter of rotation (mm) | 1—8 |
| Welding wire diameter (mm) | 0.9—1.6 |
| Rotational speed (r/min) | 200—5500 |
| Direction of rotation | Clockwise/anticlockwise |
| Maximum applicable plate (mm) | 35 |
| Suitable for welding process | GMAW/P-GMAW/FCAW-G |
Example two
The invention also provides a welding method, and the main pipeline 5 and the pipeline 4 to be welded, which are applied by the welding method, take API X65 pipeline steel as an example.
The invention also provides a welding method, which comprises the following steps:
s0. the groove of the pipe 4 to be welded is made, and in this embodiment, a groove form diagram of the pipe 4 to be welded is shown in fig. 4 as an example.
S1, assembling the pipeline 4 to be welded with the main pipeline 5, after groove processing is completed, assembling the J-shaped groove of the pipeline 4 to be welded with the main pipeline 5 by adopting an internal vertical pipe butt joint device or an external vertical pipe butt joint device, and a copper gasket on the butt joint device can effectively prevent the iron from sinking, ensure forced forming of the back during bottoming and improve the back forming quality of bottoming welding.
S2, carrying out pre-welding treatment on a groove of a pipeline to be welded, cleaning oil stains and rust generated in the groove processing process, cleaning a part to be welded, preventing defects such as air holes and slag inclusion after welding, and in the embodiment, polishing and impurity removal are preferably carried out in a range of 15-20mm on the upper side and the lower side of the groove to be welded.
S3, installing the guide rail 1 on the main pipeline 5, then fastening a quick locking mechanism 12 on the guide rail 1, wherein attention is paid to ensuring that the distance between the guide rail 1 and a groove is constant during installation, so that the adjustment of a welding gun along the axial direction of a pipeline 4 to be welded in the welding process is effectively reduced, then installing a welding trolley 2 on the guide rail 1, and realizing limit fixation of the welding trolley 2 and the guide rail 1 through a locking module 23;
in this embodiment, the guide rail 1 is preferably installed at a position 16.5cm away from the groove by using a square, the clamping position of the guide rail 1 is primarily determined, then the welding trolley 2 is installed on the locked guide rail 1, and finally the device position is finely adjusted by precisely measuring the height of the guide rail 1 and the distance between grooves to be welded, so that the adjustment of the transverse distance of the track is completed.
S4, preheating the main pipeline and the pipeline to be welded, and preferably preheating the groove to be welded and the periphery within the range of 30-50mm before welding begins, so that the operation can be beneficial to diffusion hydrogen overflow in weld metal, hydrogen-induced cracks are avoided, and the joint quality of the pipe joint is improved.
S5, welding of a backing layer is carried out, a rotary arc welding gun 3 is enabled to be matched with the welding process parameters of the STT backing layer through a control system and a welding power supply, a welding trolley 2 drives the rotary arc welding gun 3 to move on a guide rail 1 along the circumferential direction of a pipeline 4 to be welded, complete circumferential movement is carried out, in the moving process, the rotary arc welding gun 3 can carry out welding of the backing layer on a groove to be welded, and in the process, the welding process parameters of the rotary arc STT backing layer are exemplified in the table 2 below.
TABLE 2 rotating arc STT priming welding process parameters
| Vs(m/min) | U(V) | I(A) | Vh(cm/min) | f(Hz) | D(mm) | L(mm) | Ar(%) | CO2(%) | Gas(L/min) |
| 6.4 | 17.2 | 145 | 25 | 10 | 1 | 10 | 20 | 80 | 30 |
S6, welding of filling layers is carried out, a rotary arc welding gun 3 is enabled to be matched with welding process parameters of MAG filling layers through a control system and a welding power supply, a welding trolley 2 drives the rotary arc welding gun 3 to move on a guide rail 1 along the circumferential direction of a pipeline 4 to be welded, in the moving process, the rotary arc welding gun 3 can weld at least one filling layer of a groove to be welded, the welding trolley 2 corresponds to a complete circular motion when each filling layer is welded, the number of filling layers is at least one, the number of filling layers can be multiple, the specific welding times of the filling layers can be flexibly selected according to actual conditions, in the process, the welding process parameters of the rotary arc MAG filling layers are shown in the following tables 3 and 4, and in the example, the number of filling layers is preferably two.
TABLE 3 welding process parameters for rotating arc MAG filler layer 1
| Vs(m/min) | U(V) | I(A) | Vh(cm/min) | f(Hz) | D(mm) | L(mm) | Ar(%) | CO2(%) | Gas(L/min) |
| 10 | 24.8 | 208 | 55 | 35 | 1 | 10 | 50 | 50 | 50 |
TABLE 4 rotating arc MAG filler layer 2 welding process parameters
| Vs(m/min) | U(V) | I(A) | Vh(cm/min) | f(Hz) | D(mm) | L(mm) | Ar(%) | CO2(%) | Gas(L/min) |
| 10 | 24.8 | 208 | 55 | 35 | 1 | 10 | 50 | 50 | 50 |
S7, welding a cover layer, enabling the rotary arc welding gun 3 to be matched with welding process parameters of the MAG cover layer through a control system and a welding power supply, enabling the welding trolley 2 to drive the rotary arc welding gun 3 to move on the guide rail 1 along the circumferential direction of a pipeline 4 to be welded, and performing complete circumferential movement, wherein in the moving process, the rotary arc welding gun 3 can weld the cover layer on a groove to be welded, and in the process, the welding process parameters of the rotary arc MAG cover layer are shown in the following table 5.
TABLE 5 rotating arc MAG overlay welding process parameters
| Vs(m/min) | U(V) | I(A) | Vh(cm/min) | f(Hz) | D(mm) | L(mm) | Ar(%) | CO2(%) | Gas(L/min) |
| 9.5 | 23.8 | 203 | 65 | 15 | 1 | 13 | 50 | 50 | 50 |
The welding method adopts a bottoming scheme of single-sided welding and double-sided forming of a rotary arc STT, a filling scheme of a rotary arc MAG and a capping scheme of the rotary arc MAG, so that actual welding operation can be carried out according to the optimal welding scheme and technological parameter combination of each layer of a welding line;
compared with the 2G swing arc transverse welding process, the rotary arc has obvious advantages, the rotation frequency of the rotary arc is higher, the rotation frequency can easily reach more than tens of hertz, and the problems of unfused upper and lower side walls of the groove and the like can be effectively solved;
in the welding process, the rotating arc can stir the molten pool through the rotating characteristic, change the heat distribution in the molten pool, accelerate the cooling of the molten pool, and lead the molten metal and the tissue performance to be uniform, thereby achieving the purpose of improving the weld joint formation;
the quality of the vertical pipe transverse girth welding pipe joint finished by the welding method meets various relevant standard requirements, the welding seam is attractive in appearance, the welding efficiency is high, the service life of the laid submarine oil and gas pipeline can be effectively ensured, the application of welding process specifications for automatic welding of the pipeline on deep water and ultra-deep water submarine pipeline laying can be enriched, and a new solution is provided for the deep water and ultra-deep submarine oil and gas pipeline laying welding process.
The foregoing is merely illustrative embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present invention, and the invention should be covered. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a horizontal welding set is laid to deep water riser J type based on rotatory electric arc, its characterized in that includes guide rail, welding dolly and rotatory electric arc welder, the guide rail is connected on the trunk line, the welding dolly with guide rail swing joint and can be relative the guide rail is followed the circumferencial direction of trunk line removes, rotatory electric arc welder connects on the welding dolly and can with welding dolly synchronous motion, rotatory electric arc welder starts the back can be followed wait to weld the pipeline with wait to weld the groove on the trunk line.
2. The rotary arc-based deep water riser J-lay cross welding device of claim 1, wherein the guide rail comprises a rigid semicircular track, a quick locking mechanism and a swallow-wing spring locking mechanism, the two rigid semicircular tracks are connected through the two quick locking mechanisms and form an annular structure, a plurality of swallow-wing spring locking mechanisms are connected to the inner wall of the rigid semicircular track, and the swallow-wing spring locking mechanisms are in extrusion contact with the main pipeline so that the guide rail clamp is connected to the outer wall of the main pipeline.
3. The rotary arc-based deep water riser J-shaped paving transverse welding device according to claim 1, wherein the welding trolley comprises a base module, a traveling module, a locking module, a vertical adjusting module, a clamping module and a horizontal adjusting module, wherein the traveling module is connected to the base module and movably connected with the guide rail, the locking module is connected to the base module and is in locking fit with the guide rail, the vertical adjusting module is connected to the base module, the horizontal adjusting module is respectively connected with the vertical adjusting module and the clamping module, the rotary arc welding gun is clamped and connected to the clamping module, the vertical adjusting module can drive the horizontal adjusting module, the clamping module and the rotary arc welding gun to move along the axial direction of a pipeline to be welded, and the horizontal adjusting module can drive the clamping module and the rotary arc welding gun to move along the radial direction of the pipeline to be welded.
4. The rotating arc based deep water riser J-lay cross welding apparatus of claim 1, further comprising a welding power source connected to the rotating arc welding gun.
5. The rotating arc based deep water riser J-lay cross welding apparatus of claim 4, further comprising a wire feed unit mechanically coupled to the rotating arc welding gun.
6. The rotating arc based deep water riser J-lay cross welding apparatus of claim 5, further comprising a control system electrically connected to the welding carriage, the rotating arc welding gun, the welding power source, and the wire feed unit, respectively.
7. A method of welding comprising the steps of:
s1, assembling a main pipeline and a pipeline to be welded;
s2, performing pre-welding treatment on the groove to be welded;
s3, installing a guide rail on the main pipeline, and assembling a welding trolley on the guide rail;
s4, preheating the main pipeline and the pipeline to be welded;
s5, matching the welding process parameters of the STT primer layer with the rotary arc welding gun, and driving the rotary arc welding gun to move on the guide rail along the circumferential direction of the pipeline to be welded by the rotary arc welding gun, so that the primer layer is welded on the groove to be welded by the rotary arc welding gun;
s6, matching welding process parameters of MAG filling layers by a rotary arc welding gun, wherein the welding trolley drives the rotary arc welding gun to move on the guide rail along the circumferential direction of the pipeline to be welded, and the rotary arc welding gun welds at least one filling layer on the groove to be welded;
s7, the rotary arc welding gun is matched with welding process parameters of the MAG covering layer, the welding trolley drives the rotary arc welding gun to move on the guide rail along the circumferential direction of the to-be-welded pipeline, and the rotary arc welding gun welds the covering layer on the to-be-welded groove.
8. The welding method according to claim 7, wherein the pairing of the main pipe and the pipe to be welded in step S1 includes the use of an internal riser pair or an external riser pair.
9. The welding method according to claim 7, wherein the pre-welding treatment of the J-groove in step S2 comprises polishing and removing impurities in a range of 15-20mm on the upper and lower sides of the groove to be welded.
10. The welding method according to claim 7, wherein preheating the main pipe and the pipe to be welded in step S3 includes preheating the groove to be welded and the periphery in the range of 30-50 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311601158.XA CN117415417A (en) | 2023-11-28 | 2023-11-28 | Deep water vertical pipe J-type paving transverse welding device and welding method based on rotary electric arc |
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| CN202311601158.XA CN117415417A (en) | 2023-11-28 | 2023-11-28 | Deep water vertical pipe J-type paving transverse welding device and welding method based on rotary electric arc |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010253511A (en) * | 2009-04-24 | 2010-11-11 | Nippon Steel & Sumikin Welding Co Ltd | Method of welding circumference of fixed steel pipe |
| CN108098110A (en) * | 2016-11-25 | 2018-06-01 | 中国石油天然气集团公司 | A kind of welding method of hillside fields pipeline |
| CN109465578A (en) * | 2018-11-22 | 2019-03-15 | 郑州科慧科技股份有限公司 | A kind of quick-clamping, walking and welder along circular orbit operation |
| CN110732754A (en) * | 2019-11-27 | 2020-01-31 | 江苏科技大学 | TIG welding device for butt joint of LNG pipelines and welding method thereof |
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2023
- 2023-11-28 CN CN202311601158.XA patent/CN117415417A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010253511A (en) * | 2009-04-24 | 2010-11-11 | Nippon Steel & Sumikin Welding Co Ltd | Method of welding circumference of fixed steel pipe |
| CN108098110A (en) * | 2016-11-25 | 2018-06-01 | 中国石油天然气集团公司 | A kind of welding method of hillside fields pipeline |
| CN109465578A (en) * | 2018-11-22 | 2019-03-15 | 郑州科慧科技股份有限公司 | A kind of quick-clamping, walking and welder along circular orbit operation |
| CN110732754A (en) * | 2019-11-27 | 2020-01-31 | 江苏科技大学 | TIG welding device for butt joint of LNG pipelines and welding method thereof |
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