巴西专利BR112015029273B1 system for aligning and welding two segments of a tube

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专利摘要:
SYSTEM AND METHOD FOR ALIGNING AND JOINTING BY WELDING TWO SEGMENTS OF A PIPE The present invention is directed to a system for joining by welding the segments of a pipe. The system includes an external alignment mechanism to externally support and manipulate the orientation of the pipe segments to align relative segments. The system also includes an internal welding mechanism to apply the weld to the inside of the front joint of two segments of pipe in contact with each other. The internal welding mechanism which includes the torch for applying the weld, a laser for reading the weld profile and the orientation of a pivot head portion of the torch, and a camera for visual inspection of the weld after welding are applied.
公开号:BR112015029273B1
申请号:R112015029273-9
申请日:2014-05-22
公开日:2021-07-06
发明作者:Shankar Rajagopalan；Siddharth Mallick；Jose C. Bouche
申请人:Crc-Evans Pipeline International, Inc.；
IPC主号:

专利说明:

CROSS REFERENCE TO RELATED ORDERS
[001] The present application claims priority, under 35 USC § 119 (a) - (d), to US Provisional Application No. 61/826628, filed May 23, 2013, the contents of which are incorporated herein by reference into its entirety. Field of Invention
[002] The present invention is directed to a system for aligning and connecting two pipe segments together by welding. Background of the Invention
[003] Conventional internal welds often include internal alignment mechanisms that expand radially outward to contact the interior of the tube. Alignment of the two pipe segments is carried out from the inside, when the extension members of a central member contact the interior of the pipe relatively close to the joint element of the pipe segment, they face either side of the joint element. as shown in US Patent No. 3,461,264; 3,009,048; 3,551,636; 3,612,808 and GB 1261814 (which are each incorporated herein by reference in their entirety). In order to weld the joint element, the expander frame must allow sufficient space to accommodate a rotating torch. It would therefore be advantageous to provide an internal alignment that allows sufficient space for a rotating or articulated torch or to externally align the tube segments so as to eliminate the need for an internal expander that can create significant internal clutter.
[004] Additionally, the conventional internal welding process generally involves internal or external alignment and insertion of the internal welder element so that the torches align with the face of the joint element. In said process it is sometimes difficult to assess the accuracy of the positioning of the internal welding element in general and the torch in particular. It is even more difficult to assess the accuracy of the torch position as the torch traverses the interior of the tube along its orbital path during welding. It would therefore be advantageous to provide a system for tracking the structure of or positioning the tube edges at the tube interface so as to control the torch by using the tracked condition of the interface. Specifically, it would be advantageous to first track an interface profile with a laser before sending a signal to an electronic controller to direct the position and orientation of the welding torch with respect to the tracked interface of the tube profile.
[005] Furthermore, conventional pipe welding systems that employ external alignment mechanisms typically support two segments on rollers and manipulate the position and orientation of the segments until the alignment is satisfactory. Satisfactory alignment typically depends, for example, on industry-acceptable high and low gauges that are reasonably accurate, but are manually operated and positioned at separate locations rather than over the entire pipe interface. In either case, the profile or structure of the interface as viewed from within the tube is typically not a consideration for the quality of the alignment. Therefore, it would be advantageous to provide an alignment system in which information about the interface profile as read by the laser is used as an input parameter during the external alignment process. Specifically, it would be advantageous to provide the information from a torch control laser to the controller that would use the information to control the external alignment mechanisms.
[006] Furthermore, conventional piping systems for welding pipe segments will typically lack the ability to visually inspect the weld applied by the torch. It would therefore be advantageous to provide a camera that follows the welding application by the torch and a screen to show an image of the weld so that an operator can visually inspect the weld quality.
[007]Other advantages of the present description will be apparent by reviewing the present description. The patentable advantages are not limited to those highlighted in this section. Invention Summary
[008] The system of the present invention for aligning and welding together the faces of two pipe segments includes an external alignment mechanism and a welding mechanism. The external alignment mechanisms can be as sophisticated as the alignment modules shown in the drawings or as simple as a tipton-type clamp as illustrated in US Patent No. 1,693,064. The mechanisms used may also be suitable for inshore or offshore pipeline construction. US Patent No. 1,693,064 is incorporated herein by reference in its entirety. Regardless of which mechanism is employed, the external alignment mechanism supports and adjustably positions each segment so that the segments are substantially collinear or axially aligned along their longitudinal axes.
[009] The external alignment mechanism can support a segment of tube and may include motorized features that allow the position and orientation of the tube to be adjusted. Specifically, the external alignment mechanism can include rollers that allow the tube to move longitudinally. The tube can also be supported by rollers which allow the tube to be rotated around the longitudinal axis and moved up and down. Position and orientation adjustments can be automatic such as by motor power or hydraulic power controlled at an operator station or fed to a central controller that automatically controls and aligns segments based on predetermined alignment or feedback parameters from a Internal laser reading of an interface or joint element profile.
[010] The welding mechanism is preferably an internal welding machine that applies the weld (e.g. a "GMAW" gas metal arc weld) from within the tube segments to the face or edge of the element. segment joint and inside a v-shaped opening formed by the bevelled edges of two pipe segments (other cross-sectional shapes other than a V can be used as well). The welding mechanism includes a carriage capable of engaging the inner walls of the tube to secure or lock itself within the tube in a fixed position and the welding portion rotationally supported from the carriage within the tube. Specifically, the inner welder element is located within the aligned tube and then positioned longitudinally so that the welding head portion or torch is in longitudinal proximity with respect to the edge joint element. The welding mechanism also includes a swivel mechanism for rotating the welding portion with respect to the trolley. The welding head portion or torch is rotationally supported on the welding portion about the longitudinal axis of the tube so that the torch can closely follow the entire interior joint interface element in an orbital rotation. Specifically, during welding, the torch of the pivot head portion follows the edge joint element around the entire inner circumference of the tube which applies weld material. In addition to circular rotation with respect to the carriage, various control elements can move the weld head portion axially along the tube with respect to the carriage, radially towards and away from the joint element, and pivotally about a point or axis (for example, an axis parallel or perpendicular to the longitudinal axis of tube AA). A controller can direct the pivoting torches. Said degrees of freedom of articulation allow a weld head portion to be very effective and efficient in filling the interface profiles optimally and where necessary.
[011] The welding mechanism also includes a laser tracking mechanism that works in conjunction with the welding portion torch to read the profile of the interface joint element and/or profile of the weld material to apply welding material. solder to edge joint element in appropriate location and quantity. The laser mechanism surveys the weld and sends a signal to the hinged weld head portion controller to control movement of the head portion around the entire edge joint element. Specifically, the torch follows the laser as the weld head portion control system continuously receives weld profile information from the edge joint element. The information is then used to continuously adjust the torch to achieve the desired weld structure.
[012] In addition to the laser tracking mechanism, the system can include a 2D camera for visual inspection of the weld. The 2D camera is mounted on the weld portion and follows the torch so that an operator can inspect the weld as soon as it is created by the torch. A visual signal is sent to an external operator's screen. For example, the 2D camera might be a color camera and a change in color might indicate a defect in the weld to the operator. A perceived change in the profile can also indicate a defect. Brief Description of Drawings
[013] Figure 1 illustrates a perspective view of a tube welding system of the present invention showing two externally aligned tube segments supported on alignment mechanisms.
[014] Figure 2 illustrates an enlarged external view of the two-segment tube interface to be welded using the system in figure 1.
[015] Figure 3 illustrates the system of figure 1 that shows a welding mechanism inserted in a segment according to figure 1.
[016] Figure 4 illustrates an enlarged view of a section of Figure 3 showing the welding portion of the welding mechanism positioned for welding on a pipe segment according to Figure 1.
[017] Figure 5 illustrates a cross-sectional view of Figure 4 cut through B-B that shows the arrangement of several solder portion elements.
[018] Figures 6 and 7 illustrate side views of the welding mechanism in figure 1.
[019] Figure 8 illustrates a perspective view of the system of Figure 1 in a configuration that shows the first stage of use in which a pipe segment is arranged in an external alignment mechanism.
[020] Figure 9 illustrates a perspective view of the system of Figure 1 in a configuration showing the subsequent step of Figure 8 in which a welding mechanism is inserted into a pipe segment.
[021] Figure 10 illustrates a side view of a welding portion of the system of Figure 1.
[022] Figure 11 illustrates an enlarged perspective view of a section of the welding portion of the system of Figure 1.
[023] Figure 12 illustrates another enlarged perspective view of a section of the welding portion of the system of Figure 1.
[024] Figure 13 illustrates an enlarged perspective view of the rotating mechanism of the Figure 1 system.
[025]Similar reference numerals were used to identify similar elements throughout the description. Detailed Description of the Invention
[026]Referring to figures 1-3, the system for welding pipe segments together is described as follows. Figure 1 shows an external alignment mechanism 10A and 10B that is capable of supporting, positioning, and repositioning multiple lengths of tubing. Each mechanism 10A and 10B can include supports (eg rollers) on which a length of tubing can be supported. A longitudinal roller 12 movably supports the pipe segment 105 so that the segment 105 can be repositioned along its longitudinal direction defined by arrow A. Additionally, the rotational rollers 14 are rotatable about an axis parallel to axis AA of support segment 105 on either side of segment 105 allowing them to rotate or adjust the angular orientation of segment 105 about axis AA. The external alignment mechanism 10 is capable of automatically manipulating multiple segments in various positions and orientations via motors, hydraulics, etc. For example, segments can be raised, lowered, rotated, tilted, pivoted, etc.
[027] As shown in Figure 1, the external alignment mechanisms 10A and 10B support multiple segments 105, 110 and adjust their position and orientation until segments 105, 110 are both aligned so that their longitudinal axes AA are collinear and one end of each of the segments 105, 110 touches the interface edges. Specifically, Figure 2 illustrates an enlarged detail view 100 of Figure 1 in which the edges form the interface of tube 120 (known as an "adapted" joint element).
[028] The pipe alignment and welding system of the present invention applies the weld to the interior of the interface 120 from within the assembled segments 105, 110. To apply the weld to the interior of the joint element 120, an internal welding mechanism 300 is rotated within one end of one of the segments 105 as shown in Figure 3. A second segment 110 is then disposed on the outer alignment mechanism 10B and manipulated until both segments 105, 110 are satisfactorily aligned. An external force can then be applied to a reach rod 345 of the internal welding mechanism 300 or the mechanism can include automatic self-propelling means to adjust its axial position within the aligned segments 105, 110.
[029] As shown in Figures 4-7, the welding mechanism 300 includes a carriage 301 and a welding portion 302. The carriage 301 includes at least one alignment mechanism 340A, 340B that is radially expandable to engage the inner surface. of segments 105 or 110. Said expansion and engagement not only fixes the axial/longitudinal positioning of the welding mechanism 300 with respect to the segment 105, 110 but also aligns or radially centers the welding mechanism 300 within the segments 105, 110. cart 301 also includes a body portion 311 on which swivel mechanism 335 is supported. Body portion 311 is comprised of multiple elongated structural support members extending between alignment mechanisms 340A and 340B. As discussed below the solder portion 302 includes a similar corresponding structure 313.
[030] The welding portion 302 is rotationally connected to the carriage 301 and extends from one end of the carriage 301. The relative rotation between the carriage 301 and the welding portion 302 is facilitated by a rotating mechanism 335. rotary mechanism 335 is fixed to trolley 301 and automatically (by means of a motor and gears) rotates welding portion 302 with respect to trolley 301 around longitudinal axis A. welding portion 302 can be cantilevered from trolley 301 or can be supported by an additional alignment mechanism 340C located so that torch 305 is positioned between alignment mechanisms 340B and 340C. When alignment mechanism 340C is provided, weld portion 302 is rotatable with respect to and between both alignment mechanisms 340B and 340C as alignment mechanisms 340B and 340C expand to secure themselves within a segment. Additionally, trolley 301 may include a reach rod 345 which may be structured as an elongated extension from trolley 301 that an operator can grip to insert/push or retract/pull welding mechanism 300 to axially position it within. a segment 105, 110.
[031] Figure 4 shows an enlarged view of section 200 of figure 3 in which only segment 105 is present and segment 110 is absent. As shown in Figure 4, the welding portion 302 includes a welding group 303 comprising a torch 305, a laser sensors 310, and a color camera 320. The welding portion 302 additionally has a body portion 313 in which a torch 305, laser sensors 310, and color camera 320 are supported. Laser 310 tracks an inner segment joint element 105, 110, and detects an interface profile to be used to position torch 305 in applying solder to the joint interface element. Body portion 313 extends between alignment mechanism 340B and 340C. Section 200 shows welding mechanism 300 located within segment 105 with torch 305 generally pointed in a radially outward direction and positioned to apply weld to front joint 120. Figure 5 shows one embodiment of a schematic overview in cross section of welding mechanism 300 through section BB showing welding group 303 facing in the insertion direction of welding mechanism 300. Figure 5 also shows direction D of rotation of welding group 303 when it is rotated by the rotating mechanism 335. Therefore, the welding action at a particular point along the welding joint element 120 will first be triggered by laser sensors 310 followed by torch 305 and finally by 2D inspection camera 320.
[032] Figures 10 - 12 illustrate multiple perspectives of the solder portion 302. Figure 10 shows a wire sending system 322. The wire sending system 322 includes a wire storage spool 323, a wire smoothing element optional 325, and a wire feed mechanism 330 that is automatically controlled to send the proper amount of wire to the torch 305. As the swivel mechanism 335 rotates the welding portion 302, wire is fed to the torch 305 by the mechanism. of wire shipping 322.
[033]As mentioned above, the torch 305 can be positioned and oriented in multiple modes by multiple mechanisms. The 305 torch is supported on a manipulation element. The manipulating element includes a radial positioning element, an axial positioning element and a pivot element. Specifically, a radial positioning element 307 (e.g., a rack and pinion) on which the torch 305 is supported is capable of moving the torch radially toward and away from the inner surface of segments 105, 110. In other words , towards and away from the interface of segments 105, 110 to be welded. Additionally, an axial positioning element 309 (e.g., the rack and pinion) can move the torch 305 axially within segments 105, 110. The manipulating element also includes a pivot element 308 that allows the torch to pivot (e.g., around an axis parallel to the longitudinal axis of segment AA). The pivotal movement by pivot element 308 can be driven by a motor and gears 306. For example, the motor can be a stepper motor.
[034] A torch manipulation element can compose the manipulation movements of the aforementioned elements by supporting the elements in a dependent way. For example, the body portion 313 may support the axial positioning element which in turn supports the radial positioning element which in turn supports the pivot element which in turn supports the torch. Similarly, the axial positioning element can be supported by the radial positioning element. Additionally, any support order can be used.
[035] The elements of the manipulation element are controlled by a controller that receives as input, a series of signals that include a signal from laser 310 and then processes the information before transmitting a signal to at least the radial positioning element 307, axial positioning element 309, pivot element 308, and wire sending system 322. Torch 305 is then continuously repositioned and reoriented according to predetermined controller parameters based on signals from the laser. profile reading 310.
[036] The operation of the internal welding system of the present invention will now be described. Figures 1, 8 and 9 illustrate the process of positioning and soldering segments 105 and 110 together. In operation, one or more of the steps enumerated below can be performed so that: a) a segment of tube 105 is disposed in an alignment device/tube holder 10A; b) internal welding machine 300 is then inserted into tube segment 105; c) a second tube segment 110 is then aligned with tube segment 105 and the welding mechanism 300 is pulled forward by the reach rod 345 or automatically actuated so that the torch 305 generally aligns with the front joint element 120 of tube segments 105, 110; d) alignment mechanisms 340A, 340B (and if necessary 340C) are then engaged to secure welding mechanism 300 within tube segments 105, 110; e) in an (optional) mode, the rotary mechanism 335 rotates the weld head portion 305 to perform an initial reading of interface joint element 120 of tube segments 105, 110 by laser sensing devices 310 to ensure an optimum fitting; f) if necessary, steps (c), (d) and (e) can be repeated, i.e. the tube segments 105, 110 are realigned / rotated and re-read by laser 310, to improve “fit”; g) optionally, the internal alignment mechanism 340C at the rear of the welding mechanism 300 is engaged to retain the axial position of the welding mechanism 300 with respect to both tube sections 105, 110; h) with welding mechanism 300 attached to tube segments 105 and 110, the root weld cycle (first weld) starts so that laser 310 reads tube interface 120, torch 305 follows laser 310 , and the output from laser 310 is used to control the position of the articulated torch 305, where the position and orientation of the torch 305 with respect to interface 120 is controlled so as to produce the best quality weld; i) in addition to a signal from the laser 310, through the arc current monitoring can also be used for targeting the position of the torch; j) after completion of a 360° weld, the weld head portion 305 is rotated back to the original position; k) profile (using 310 laser) and visual inspections (with 2D color camera 320) are carried out either in previous step (j) in a separate inspection round; l) after inspection, the alignment mechanisms 340A-C are released and the welding mechanism 300 is pulled or driven forward towards as the weld tube open end 105, 110 and with the mechanism nose portion of exposed welding 300, as in (b), the tube segment 110 is disposed on the outer alignment mechanism 10B and advanced to the next joint element; m) steps (c) to (l) are then repeated for the entire production run.
[037] In one embodiment, a signal from laser sensors 310 is sent to an electronic controller of the external alignment mechanism 10 to automatically reposition one or both segments 105, 110 to a more desirable arrangement of the front joint 120. Additionally , the steps can be performed in the given order. However, variations in order are also contemplated.
[038]In another modality, instead of stopping after the first 360° weld, the rotation is continued to lay out another weld pass, the laser can be used to inspect & track simultaneously at the same time as the 2D color camera Rear continues inspection after the second weld.
[039] In yet another modality, instead of welding a complete 360° weld, the weld is performed in two 180° halves with the same starting position. This implementation may require either multiple laser sensors for tracking or a mechanism to physically oscillate the laser and/or torch so as to maintain the forward position of the read sensor in both directions of rotation (i.e., rotating the torch and the laser so that they oscillate the positions).
[040] Although the present invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications can be made to it without deviating from the spirit and scope thereof. Thus, it is intended that the present invention cover the modifications and variations of the present invention provided they come within the scope of the appended claims and their equivalents. It should be understood that terms such as "top", "bottom", "front", "back", "side", "height", "length", "width", "top", "bottom", "interior ”, “outside”, and the like as may be used herein, merely describe points of reference and do not limit the present invention to any particular orientation or configuration.

权利要求:
Claims (20)
[0001]
1. A system for aligning and welding together two segments of a tube, comprising: a welding mechanism configured to apply a weld to a face joint of the two segments, the welding mechanism including a joint torch, a laser sensor configured for reading a face joint profile, and an electronic controller configured to receive information signals from the laser sensor to control a position or orientation, or both the position and orientation of the torch; and an external alignment mechanism configured to manipulate orientation of a longitudinal axis of at least one of the segments with respect to the other, wherein the welding mechanism further includes a welding portion and a carriage, the carriage having an internal alignment mechanism, wherein the welding mechanism is movable within at least a first of the two segments so that the torch is aligned with the face joint between the two segments and so that the internal alignment mechanism then expands radially to engage a surface. interior of the tube to maintain a longitudinal position of the welding mechanism in place, CHARACTERIZED by the fact that: the welding portion is configured to rotate relative to the carriage inside the tube around the longitudinal axis of at least one of the two segments, and the torch and laser sensor are rotationally supported by the welding portion so that, during welding, the torch follows the sensor of laser along the face joint.
[0002]
2. System according to claim 1, CHARACTERIZED by the fact that the welding mechanism additionally includes a camera for optical detection of the face joint.
[0003]
3. System according to claim 2, CHARACTERIZED by the fact that the camera follows the torch along a path of the solder joint, the camera sending a signal to an operating station screen to allow an operator to inspect an image of a portion of the solder.
[0004]
4. System according to claim 1, CHARACTERIZED by the fact that the articulation movement of a torch head on the torch includes one or more of radial translation movements that approach and move away from the face joint, translation movement in a direction of the longitudinal axis, pivotal movement with respect to the welding mechanism about an axis that is parallel to the longitudinal axis, and pivotal movement with respect to the torch head about an axis that is perpendicular to the longitudinal axis.
[0005]
5. System according to claim 1, CHARACTERIZED by the fact that the welding mechanism rotates within and relative to an interior of the face joint of the two segments so that the torch follows the laser sensor, the laser sensor providing continuous face joint profile data to the electronic controller which in turn continuously directs torch placement.
[0006]
6. System according to claim 1, CHARACTERIZED by the fact that maintaining the longitudinal position of the welding mechanism in the tube comprises a lock of the longitudinal position of the welding mechanism in relation to the two segments while the welding portion rotates.
[0007]
7. System according to claim 1, CHARACTERIZED by the fact that the torch joint includes radial translation movements that approach and move away from the face joint, an axial translation movement in a direction of the longitudinal axis, and a pivotal movement relative to the welding mechanism around an axis that is parallel to the longitudinal axis or relative to a torch head on the torch around an axis that is perpendicular to the longitudinal axis.
[0008]
8. A system for aligning and welding together two segments of a tube, comprising: a welding mechanism configured to apply a weld to a face joint of the two segments, the welding mechanism including: a joint torch, a laser sensor configured to read a face joint profile, a carriage, a weld portion, a second internal alignment mechanism, and an electronic controller configured to receive information signals from the laser sensor to control a position or orientation, or both the position and orientation of the torch, wherein the carriage is configured to maintain a longitudinal position of the welding mechanism on the tube, the carriage including a first internal alignment mechanism configured to radially expand on a first side of the torch to engage a interior surface of a first of the two segments, CHARACTERIZED by the fact that: the weld portion is configured to rotate with respect to On the carriage inside the tube, the second internal alignment mechanism is configured to radially expand on a second side of the torch, opposite the first side, to engage an interior surface of a second of the two segments, and the torch and sensor. lasers are rotationally supported by the weld portion so that, during welding, the torch follows the laser sensor along the face joint as the torch rotates around a longitudinal axis.
[0009]
9. System according to claim 8, CHARACTERIZED in that it further comprises: an external alignment mechanism configured to manipulate an orientation of one of the two segments relative to the other along the longitudinal axis by contact with an exterior of the one segment.
[0010]
10. System according to claim 9, CHARACTERIZED by the fact that the electronic controller receives a signal from the laser sensor so that the external alignment mechanism, in response to the signal, adjusts the relative positions of the two segments with based on predetermined alignment parameters.
[0011]
11. System according to claim 8, CHARACTERIZED by the fact that the cart includes a third internal alignment mechanism configured to expand radially to engage the interior surface with the first of the two segments.
[0012]
12. System according to claim 11, CHARACTERIZED by the fact that the laser sensor is positioned between two of the internal alignment mechanisms.
[0013]
13. System, according to claim 8, CHARACTERIZED by the fact that the torch is rotatable by the welding portion through a 360° weld.
[0014]
14. System, according to claim 8, CHARACTERIZED by the fact that the torch is positioned between the first and second internal alignment mechanisms.
[0015]
15. The system according to claim 14, characterized in that it further comprises a third alignment mechanism configured to expand radially to engage an interior surface of one of the two segments.
[0016]
16. System according to claim 8, CHARACTERIZED by the fact that maintaining the longitudinal position of the welding mechanism in the tube comprises a lock of the longitudinal position of the welding mechanism in relation to the two segments while the welding portion rotates.
[0017]
17. System according to claim 8, CHARACTERIZED by the fact that the torch joint includes radial translation movements that approach and move away from the face joint, an axial translation movement in the direction of the longitudinal axis, and a movement pivoting with respect to the welding mechanism around an axis that is parallel to the longitudinal axis or with respect to a torch head on the torch around an axis that is perpendicular to the longitudinal axis.
[0018]
18. A system for aligning and welding together two segments of a tube, comprising: a welding mechanism configured to apply a weld to a face joint of the two segments, the welding mechanism including an articulated torch, a laser sensor configured to reading a profile of the face joint, and an electronic controller configured to receive information signals from the laser sensor to control a position or orientation, or both the position and orientation, of the torch; an alignment mechanism configured to manipulate an orientation of a longitudinal axis of at least one of the two segments relative to the other; wherein the electronic controller receives a signal from the laser sensor such that the alignment mechanism adjusts the relative positions of the two segments in response to the signal, CHARACTERIZED by the fact that: the welding mechanism additionally includes a carriage to hold a longitudinal position of the welding mechanism on the tube and a welding portion configured to rotate relative to the carriage inside the tube, and the torch and laser sensor are rotationally supported by the welding portion so that, during welding, the torch follows the laser sensor along the face joint.
[0019]
19. The system of claim 18, CHARACTERIZED in that the carriage includes at least a first internal alignment mechanism configured to radially expand on a first side of the torch to engage an interior surface of a first of the two segments, and wherein the welding mechanism includes a second internal alignment mechanism configured to radially expand on a second side of the torch, opposite the first side, to engage an interior surface of a second of the two segments.
[0020]
20. System according to claim 18, CHARACTERIZED by the fact that the torch rotates around the longitudinal axis, and in that a torch head on the torch moves axially along the tube in relation to the carriage.

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法律状态:
2018-11-06| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

2019-07-09| B07A| Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]|

2019-12-31| B09B| Patent application refused [chapter 9.2 patent gazette]|

2020-03-10| B12B| Appeal against refusal [chapter 12.2 patent gazette]|

2021-07-06| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 22/05/2014, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

申请号 | 申请日 | 专利标题

US201361826628P| true| 2013-05-23|2013-05-23|

US61/826,628|2013-05-23|

US14/272,914|US10040141B2|2013-05-23|2014-05-08|Laser controlled internal welding machine for a pipeline|

US14/272,914|2014-05-08|

PCT/US2014/039148|WO2014190156A1|2013-05-23|2014-05-22|Laser controlled internal welding machine for pipelines|

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