CN109604923B - Spot welding aligning device and aligning method for pipeline aligning welding - Google Patents
Spot welding aligning device and aligning method for pipeline aligning welding Download PDFInfo
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- CN109604923B CN109604923B CN201811389894.2A CN201811389894A CN109604923B CN 109604923 B CN109604923 B CN 109604923B CN 201811389894 A CN201811389894 A CN 201811389894A CN 109604923 B CN109604923 B CN 109604923B
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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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
Abstract
The invention belongs to the technical field of welding equipment, and particularly relates to a spot welding butt-joint device and a butt-joint method for butt-joint welding of pipelines, which comprise an arc-section fixed tile, an arc-section movable tile and an arc-section locking tile, wherein the arc-section fixed tile, the arc-section movable tile and the arc-section locking tile are made of copper materials; the arc-segment fixing tile, the arc-segment moving tile and the arc-segment locking tile are arranged in a dovetail groove of the dovetail groove slideway through dovetail slide blocks arranged in the middle of the outer sides of the arc-segment fixing tile, the arc-segment moving tile and the arc-segment locking tile; wide opposite buckling connecting lugs and narrow opposite buckling connecting lugs are symmetrically distributed on two sides of a dovetail groove slideway of the fixed tile; narrow opposite buckling connecting lugs are symmetrically distributed on two sides of a dovetail groove slideway of the locking tile; the upper part of the fixed tile and the middle part of the arc-section moving tile are provided with rectangular spot welding holes which are symmetrically and respectively arranged; the bottom of the arc section locking tile and the bottom of the arc section fixing tile are locked and buckled on the pipeline through bolts. The device realizes the correction of butt joint through the arc section tile of butt joint, only needs to twist soon and just can realize welding the correction of butt joint with the bolt complex nut of interlude arc section tile, has improved welding quality and welding efficiency, has reduced construction cost.
Description
The technical field is as follows:
the invention belongs to the technical field of welding equipment, and particularly relates to a spot welding aligning device and an aligning method for aligning welding of pipelines.
Background art:
the pipelines buried underground and on the ground for oil or water transportation often have the phenomenon of perforation due to corrosion, and the treatment mode of the perforation pipelines is mainly to replace the section of the perforation pipeline with serious corrosion, namely to cut the section of the perforation pipeline, and then to replace the perforation pipe with a section of new pipeline with equal length to communicate the whole pipeline through welding. The butt joint of pipelines can be realized only by two welding openings of new pipelines with equal length, and generally, one end of a certain section of new pipeline is welded with one end of a broken pipe, and then the other end of the new pipeline is welded with the other end of the broken pipe. However, due to external force reasons such as buried stress and the like, after the pipeline buried underground for a long time is cut off for a section, the external stress is generated due to soil foundation deposition and the like, so that the two disconnected pipelines are not concentric any more; namely, the fracture of the buried pipeline is dislocated after the buried pipeline is disconnected, the dislocation of the horizontal buried pipeline after the buried pipeline is disconnected is shown in figure 1, and the dislocation of the vertical buried pipeline after the buried pipeline is disconnected is shown in figure 2. Not only the buried horizontal and vertical pipelines are subjected to fracture dislocation after being disconnected, but also the horizontal and vertical pipelines on the ground can be subjected to fracture dislocation due to welding stress or other external forces when the pipelines are connected, for example, the ground pipeline between metering rooms in an oil field has one end which is a long-distance pipeline buried underground and the other end which is connected with equipment such as an output pump between stations, and the like, so that the dislocation phenomenon can be generated after the fracture of the connected pipelines.
Currently, when dealing with the perforation of a pipeline, a section of the pipeline that has been corroded in the perforation is cut and the perforated pipeline is replaced by a weld of a new pipeline of approximately equal length, the length of the new pipeline being actually measured as required by the weld in place, and being substantially the same length as the cut pipeline. When the pipes are welded, a new pipeline is welded with one fracture, the new pipeline before the first welding opening is welded is provided with two free ends, the two butt-welded pipelines can be welded only by holding one end of the new pipeline to be approximately concentric, usually, at least two positions are spot-welded on the circumference of a butt joint of the pipelines to fix the new pipeline, and then the butt joint is welded. After the first welding opening is welded, the second welding opening is welded, and due to the fracture dislocation phenomenon, when the last welding opening is welded, external force is needed to correct two ends of the dislocated pipeline to enable the pipeline to be concentric as much as possible, or to ensure that the pipeline is butt-seamed on a cylindrical surface as much as possible, so that the welding quality is ensured; when the crater is aligned, usually, a plurality of operators use a crowbar to pry one of the staggered pipelines or pry two staggered pipelines simultaneously, so that two staggered fractures are aligned as far as possible, a welder performs spot welding on the butt-welded crater immediately at the moment, selects the number of spot welding points according to the stress, and withdraws the crowbar to perform butt welding after the butt-welded pipelines are fixed by spot welding. To the great fracture dislocation of deflection, not only use the crowbar to carry out the butt joint, still need realize the butt joint according to the condition on scene through the mode that pulls the haulage rope, to the butt joint pipeline that the pipe diameter is little, still use the pipe tongs to block aslope on the pipeline at butt joint both ends to carry out supplementary butt joint sometimes.
The method for correcting and aligning two ends of the pipeline for welding the last weld joint has the following defects that (1) at least 2 persons are needed to cooperate with welders to finish the alignment welding, so that the labor cost is increased; (2) the correction process is time-consuming and labor-consuming, the welding efficiency is low, and the welded junction can be aligned as far as possible only by prying the crowbar continuously with consistent force applied by an operator who prys the crowbar; (3) the welding quality is poor, in the process of aligning by using the crowbar, the crowbar is continuously pried to repeatedly align, the physical consumption of operators is very high, the alignment can not be ensured to be aligned to the maximum degree in the final aligning process, in addition, the pipeline aligning is completely realized by manpower, the quality of the aligning is greatly influenced by artificial reasons, for example, at the last moment of the aligning, a welder cannot judge whether the alignment correction is in the best state, the welder can only carry out spot welding and fixing under the condition that the alignment is not as possible, the alignment position is aligned according to the pipeline of the spot welding, the misalignment amount of the pipeline for the aligning welding is large at the moment, the welding quality is influenced, the welding quality is low, the alignment welding with large misalignment amount is large, the welding interface is extremely easy to be corroded, and the alignment position of an inner hole of the pipeline is greatly misaligned, so that sundries are easy to deposit at the alignment position, particularly, when the device is used as an oil pipeline, dirt such as oil wax and the like is easy to accumulate, and the flow and the pressure of the pipeline are influenced; (4) the safety is poor, when the crowbar is used for opening, the crowbar is very easy to slide, so that an operator can suddenly fall down or collide with the crowbar, and serious potential safety hazards exist; (5) the application range is limited, if weld the butt joint to burying the ground pipeline, need dig out great operation hole to the butt joint operation is accomplished smoothly, construction cost has been increased, if weld the butt joint to the perpendicular pipeline line in ground, then can't use the crowbar to realize welding the butt joint, the ground pipeline does not have the operation hole, just also does not have the strong point of crowbar, can only weld the butt joint through the mode that pulls the haulage rope at this moment, this kind of mode is extremely difficult to operate, the welding quality of butt joint is extremely low. In addition, after the pipe is broken, a new pipeline is welded again, the method is not only used for corrosion perforation of the pipeline, but also applied to other situations needing to weld the pipeline again, such as situations needing butt joint of pipelines in ground and underground pipeline reconstruction or measurement room reconstruction, and the like, and also such as situations needing to use the pipeline to communicate with a pipe network of the disassembled valve and the like because the valve of the pipeline on the ground is not needed to be disassembled for water or oil transportation of the pipe network.
The invention content is as follows:
in order to overcome the defects of the prior art and solve the problem of weld crater correction in pipeline butt welding, the invention designs a spot welding butt-welding device and a butt-welding method for pipeline butt welding. The device has the advantages of simple structure, reasonable design, simple and convenient operation, time and labor saving, low cost, safety, reliability, wide application and easy large-scale popularization and application.
The technical scheme adopted by the invention is as follows: a butt method of a spot welding butt device comprises an arc-section fixing tile, an arc-section moving tile and an arc-section locking tile, wherein the arc-section fixing tile, the arc-section moving tile and the arc-section locking tile are made of copper materials; the arc-segment fixing tile, the arc-segment moving tile and the arc-segment locking tile are arranged in a dovetail groove of the dovetail groove slide way through dovetail slide blocks arranged in the middle positions of the outer sides of the arc-segment fixing tile, the arc-segment moving tile and the arc-segment locking tile; wide opposite buckling connecting lugs and narrow opposite buckling connecting lugs which are symmetrically distributed are arranged on two sides of a dovetail groove slide way for mounting the arc-section fixing tile, the narrow opposite buckling connecting lugs are one group and are arranged at the bottom of the slide way, connecting holes are formed in two ends of the narrow opposite buckling connecting lugs, the wide opposite buckling connecting lugs are two groups and are arranged above the narrow symmetrical connecting lugs, and correction connecting holes are formed in two ends of the wide opposite buckling connecting lugs; narrow opposite buckling connecting lugs are symmetrically distributed on two sides of a dovetail groove slide way for mounting the arc-section locking tile, connecting holes are formed in two ends of each narrow opposite buckling connecting lug, and inner hexagonal counter bores are formed in the end portions of the connecting holes; two sides of a dovetail groove slideway for installing the arc-section moving tile are provided with two groups of narrow butt-joint connecting lugs which are symmetrically distributed, two ends of each narrow butt-joint connecting lug are provided with connecting holes, and the end part of each connecting hole is provided with an inner hexagonal counter bore; symmetrical rectangular spot welding holes are respectively formed in the upper parts of the arc-section fixed tiles and the middles of the arc-section movable tiles; the bottoms of the arc-section locking tile and the arc-section fixing tile are locked and buckled on the pipelines through bolts, the arc-section moving tile and the arc-section fixing tile are buckled on the two pipelines in butt welding through long correcting bolts and disc hexagonal nuts, and the butt joint of the two pipelines is positioned in the rectangular spot welding hole;
the spot welding aligning device also comprises an aligning adjusting device for aligning two butt welding pipelines, wherein the aligning adjusting device comprises a screw rod, a screw rod sleeve seat and a rotating rod, the screw rod is in threaded connection with the screw rod sleeve seat, the screw rod sleeve seat is welded on a portal frame, the portal frame is welded on a base, and the outer end of the base is provided with a groove; the end part of the screw rod is inserted into the sleeve, the sleeve is welded in the middle of the outer side of the dovetail groove slideway provided with the arc-section moving tile, and the rotating rod is inserted into the jack at the end part of the screw rod;
the spot welding butt joint device further comprises a hexagonal nut screwing device for screwing a disc hexagonal nut, and the hexagonal nut screwing device comprises an inner hexagonal sleeve, a stress application sleeve and a stress application rod; the inner hexagonal sleeve is provided with a bolt through hole, one end of the bolt through hole is provided with a hexagonal hole which can be sleeved on the disc hexagonal nut, the outer side of the other end of the bolt through hole is welded with symmetrically distributed connecting rods, the connecting rods are welded with the stress application sleeve, and the stress application rods are inserted in the stress application sleeve;
a baffle ring is arranged at one end of the hexagonal head of the disc hexagonal nut, and the outer diameter of the baffle ring is larger than the aperture of the correction connecting hole;
the arc-segment fixed tile, the arc-segment movable tile, the arc-segment locking tile and the dovetail slide block are integrally formed or separately welded;
the radian of the arc sections of the arc section fixing tile, the arc section moving tile and the arc section locking tile is the same; after the arc-section fixed tile and the arc-section movable tile are buckled to the pipeline, the gap between the tile bodies on the two sides of the arc-section fixed tile and the arc-section movable tile is not less than 1 cm; the included angle of two symmetrically distributed rectangular spot welding holes on the arc-section fixed tile and the arc-section moving tile in the circumferential direction is 90 degrees; the width of the rectangular spot welding hole is not less than 1cm, and the length of the rectangular spot welding hole is not less than 3 cm;
the sizes of the arc-section fixed tile, the arc-section movable tile and the arc-section locking tile are designed in groups according to the size specification of pipelines buckled with the arc-section fixed tile, the arc-section movable tile and the arc-section locking tile, and the arc-section fixed tile, the arc-section movable tile and the arc-section locking tile are at least designed into arc-section tiles of pipelines with the outer diameters of the buckles being 4cm, 5cm, 6cm, 7;
the pitch of the two correction connecting holes on the two groups of wide opposite buckle connecting lugs is the same as the pitch of the connecting holes on the two groups of narrow opposite buckle connecting lugs; the aperture of the correction connecting hole is at least twice of the diameter of the long correction bolt;
the top end of the dovetail groove bottom of the dovetail groove slide way is open, and the bottom end of the dovetail groove bottom is sealed;
the mouth aligning method comprises the following steps:
step one, selecting a set of arc-section fixed tiles, arc-section moving tiles and arc-section locking tiles which are consistent with the external diameter of a butt-jointed pipeline according to the external diameter of the butt-jointed pipeline, if the external diameter of the butt-jointed pipeline is 60mm, selecting a set of arc-section tiles which can be buckled with the pipeline, and respectively inserting the arc-section fixed tiles, the arc-section moving tiles and the arc-section locking tiles into dovetail grooves of dovetail groove slideways;
step two, buckling the arc-section fixing tile on the pipeline far away from the supporting surface, wherein the buckling direction is consistent with the plane determined by the central lines of the two pipelines, and when the arc-section fixing tile is buckled, the butt joint of the two pipelines is positioned in the middle of the rectangular spot welding hole; then buckling the arc-section locking tile and the arc-section fixing tile on the pipeline far away from the supporting surface in opposite directions, and locking and fixing the arc-section locking tile and the arc-section fixing tile through bolts inserted in opposite narrow opposite buckling connection lugs, wherein nuts matched with the bolts are outer hexagonal nuts;
buckling the arc section moving tile and the arc section fixing tile on another pipeline close to the supporting surface in an opposite direction, respectively penetrating four long correcting bolts through connecting holes of narrow butt joint lugs of the arc section moving tile, embedding hexagonal heads of the long correcting bolts into inner hexagonal counter bores, penetrating the other ends of the long correcting bolts through correcting connecting holes of wide butt joint lugs of the arc section fixing tile, and sequentially screwing disc hexagonal nuts matched with the long correcting bolts by using a wrench or a hexagonal nut screwing device for pre-fastening; the arc section moving tile and the arc section fixing tile are pre-fastened and then welded and corrected; firstly screwing two disc hexagonal nuts close to one side of a welding butt joint, simultaneously screwing the two disc hexagonal nuts, or sequentially screwing the two disc hexagonal nuts in a half-buckling manner, uniformly screwing, screwing one or two buckles of the two disc hexagonal nuts close to one side of the butt joint, then screwing the two disc hexagonal nuts far away from one side of the butt joint, sequentially and circularly screwing the disc hexagonal nuts to enable an arc section moving tile to slowly move to an arc section fixed tile and finally enable the two arc section tiles to be buckled or basically buckled, enabling two butt-welded pipelines to be concentric or basically concentric by the buckled or basically buckled arc section moving tile and the arc section fixed tile, correcting a staggered port, ensuring that the butt joint is in a corrected state before spot welding, and further ensuring the welding quality of butt welding;
if the dislocation displacement of the two butt welding pipeline fractures is larger than half of the diameter of the pipeline, using an arc section moving tile provided with a sleeve, and using a butt adjusting device to perform auxiliary weld seam correction, placing a base on a supporting surface or a cushioned supporting surface for a horizontally buried dislocation pipeline, screwing a screw rod through a screwing rotating rod to enable the top end of the screw rod to be inserted into the sleeve, continuously and slowly screwing the screw rod in threaded fit with a screw rod sleeve seat, and gradually jacking the arc section moving tile through a continuously rising screw rod so as to perform auxiliary weld seam correction; for horizontal or vertical ground fracture dislocation pipelines, the support rod which is propped against the groove on the base is used as a support, and the cushioned support surface can also be used as a support to perform auxiliary correction of a welded junction;
fourthly, spot welding is carried out on butt seams of the welded junctions after locking correction, gaps at two sides of the arc section fixing tile and the arc section moving tile of the butt joint are not smaller than 1cm, symmetrical rectangular spot welding holes are respectively formed in the upper portion of the arc section fixing tile and the middle of the arc section moving tile, the number of the rectangular spot welding holes is four, two welding gaps are formed between the arc section moving tile and the arc section fixing tile of the butt joint, six welding gaps which can be used for spot welding fixing are totally formed, the positions of welding spots of the spot welding are determined according to the site welding construction space, and at least two symmetrical welding spots are selected for spot welding fixing; because the arc-section fixed tile and the arc-section movable tile are made of copper materials, the arc-section tile and the butt welding pipeline cannot be welded together during spot welding, the arc-section tile is convenient to disassemble, and in addition, the arc-section tile made of the copper materials cannot damage the surface of the pipeline in the process of correcting and locking the opening;
and fifthly, after the pipelines which are welded in an opposite mode are fixed in an opposite mode through point welding, disassembling the arc section fixing tile, the arc section moving tile and the arc section locking tile, and welding the two pipelines together.
The invention has the beneficial effects that: the invention provides a spot welding device for butt welding of pipelines, which realizes butt joint correction of two welded pipeline welded junctions through butt-buckled arc-segment tiles, and can realize the correction of the welded junctions only by screwing a nut matched with a bolt penetrating the arc-segment tiles, thereby replacing other butt tools such as crowbars and the like, further ensuring that the welded junctions can be aligned to the maximum extent, improving the welding quality and the welding efficiency and reducing the construction cost. The device has the advantages of simple structure, reasonable design, simple and convenient operation, time and labor saving, low cost, safety, reliability, wide application and easy large-scale popularization and application. The advantages are mainly embodied in the following aspects:
(1) the labor cost is reduced, and for the condition that the dislocation amount of the fracture is small, only one person is needed for welding crater correction by using the device, namely, a welder can finish the butt-welding correction by one person without adding an additional operator; if the fracture dislocation amount is large, an operator is possibly required to cooperate with a welder to correct the fracture, and an auxiliary operator is required to be added according to actual requirements on the site;
(2) the weld joint aligning correction process is time-saving and labor-saving, the welding efficiency is improved, and compared with the process of aligning by using a crowbar, the welding efficiency is more labor-saving and high;
(3) the welding quality is improved, compared with the butt welding by using a crowbar, the butt welding device reduces the influence of human factors on the butt welding, the butt welding by the crowbar is completely realized by manpower, the quality of the butt welding is greatly influenced by the human factors, and the welding quality is further influenced, the device is corrected by bolts capable of being locked, the influence of the human factors is reduced, the butt welding quality of a welding opening is ensured, and the butt welding quality is further ensured;
(4) compared with the use of a crowbar for aligning, the device can realize aligning correction only by screwing the nut, thereby avoiding operators from falling down or colliding and avoiding serious potential safety hazards;
(5) the application range is wide, and to the butt welding to burying ground pipeline, not need too big operation hole, also need to be corrected the pipeline annex moreover and have the strong point, be applicable to various needs butt welding's operating mode.
(6) The universal welding device has the advantages that universality is high, the arc segment tiles with different specifications can be replaced, the universal welding device can be used for butt welding of pipelines with different outer diameters, application is wide, and manufacturing cost is reduced.
Description of the drawings:
FIG. 1 is a schematic view of a horizontal pipeline fracture dislocation in the prior art;
FIG. 2 is a schematic view of a fracture dislocation of a vertical pipeline in the prior art;
FIG. 3 is a schematic structural diagram according to the first embodiment;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is a schematic view of an arc segment locking shoe according to one embodiment;
FIG. 6 is a left side view of FIG. 5;
FIG. 7 is a schematic view of a fixed shoe of an arc segment according to an embodiment;
FIG. 8 is a schematic view of an embodiment of a mid-arc moving shoe;
FIG. 9 is a schematic structural view of a hexagonal disc nut according to an embodiment;
FIG. 10 is a left side view of FIG. 9;
FIG. 11 is a schematic structural view of the second embodiment;
FIG. 12 is a schematic structural view of the third embodiment;
fig. 13 is a left side view of fig. 12.
The specific implementation mode is as follows:
example one
A spot welding butt-joint device for butt-joint welding of pipelines comprises an arc-section fixing tile 1, an arc-section moving tile 10 and an arc-section locking tile 9, wherein the arc-section fixing tile 1, the arc-section moving tile 10 and the arc-section locking tile are made of copper materials; the arc-segment fixed tile 1, the arc-segment movable tile 10 and the arc-segment locking tile 9 are arranged in a dovetail groove of the dovetail groove slide way 2 through a dovetail slide block 7 arranged in the middle of the outer side of the arc-segment fixed tile; wide opposite buckling connecting lugs 4 and narrow opposite buckling connecting lugs 8 which are symmetrically distributed are arranged on two sides of a dovetail groove slide way 2 for mounting the arc-section fixing tile 1, the narrow opposite buckling connecting lugs 8 are in one group and are arranged at the bottom of the slide way, connecting holes 11 are arranged at two ends of the narrow opposite buckling connecting lugs 8, the wide opposite buckling connecting lugs 4 are in two groups and are arranged above the narrow symmetrical connecting lugs 8, and correction connecting holes 13 are arranged at two ends of the wide opposite buckling connecting lugs 4; narrow opposite buckling connecting lugs 8 which are symmetrically distributed are arranged on two sides of a dovetail groove slide way 2 for mounting the arc locking tile 9, connecting holes 11 are arranged at two ends of each narrow opposite buckling connecting lug 8, and inner hexagonal counter bores 12 are arranged at end parts of the connecting holes 11; two sides of a dovetail groove slide way 2 for installing the arc-section moving tile 10 are provided with two groups of narrow opposite buckling connecting lugs 8 which are symmetrically distributed, two ends of each narrow opposite buckling connecting lug 8 are provided with connecting holes 11, and the end part of each connecting hole 11 is provided with an inner hexagonal counter bore 12; symmetrical rectangular spot welding holes 6 are respectively formed in the upper part of the arc-section fixed tile 1 and the middle of the arc-section movable tile 10; the arc-section locking tile 9 and the bottom of the arc-section fixing tile 1 are locked and buckled on a pipeline through bolts, the arc-section moving tile 10 and the arc-section fixing tile 1 are buckled on two butt-welded pipelines through a long correcting bolt 5 and a disc hexagonal nut 3 in a butt joint mode, and the butt joint of the two pipelines is located in a rectangular spot welding hole 6; a baffle ring 14 is arranged at one end of the hexagonal head of the disc hexagonal nut 3, and the outer diameter of the baffle ring is larger than the aperture of the correction connecting hole 13; the arc-segment fixing tile 1, the arc-segment moving tile 10, the arc-segment locking tile 9 and the dovetail sliding block 7 are integrally formed or separately welded; and the symmetrical line of the dovetail slide block 7 is superposed with the symmetrical line of the arc segment tile; the radian of the arc sections of the arc section fixing tile 1, the arc section moving tile 10 and the arc section locking tile 9 is the same; after the arc-section fixed tile 1 and the arc-section moving tile 10 are buckled to the pipeline, the gap between the tile bodies on the two sides is not less than 1 cm. (ii) a The included angle of the two symmetrically distributed rectangular spot welding holes 6 on the arc section fixing tile 1 and the arc section moving tile 10 in the circumferential direction is 90 degrees; the width of the rectangular spot welding hole 6 is not less than 1cm, and the length of the rectangular spot welding hole is not less than 3 cm; the sizes of the arc-section fixed tile 1, the arc-section moving tile 10 and the arc-section locking tile 9 are designed in groups according to the sizes and specifications of pipelines buckled with each other, and arc-section tiles capable of buckling pipelines with the outer diameters of 4cm, 5cm, 6cm, 7cm and 8cm are at least designed; the three arc-segment tiles are the intercepting arc segments of the integral shaft sleeve, the intercepting arc segments are smaller than half of the shaft sleeve, and the integral shaft sleeve can be sleeved on pipelines with the outer diameter sizes of 4cm, 5cm, 6cm, 7cm and 8 cm; the pitch of the two correction connecting holes 13 on the two groups of wide opposite buckling connecting lugs 4 is the same as the pitch of the connecting holes 11 on the two groups of narrow opposite buckling connecting lugs 8; the aperture of the correcting connecting hole 13 is at least twice of the diameter of the long correcting bolt 5; the top end of the dovetail groove bottom of the dovetail groove slide way 2 is open, the bottom end of the dovetail groove bottom is sealed, namely the dovetail groove is not a through groove, and the dovetail slide block 7 slides into the dovetail groove from the top end of the dovetail groove and then is located on the slide way.
Example two
On the basis of the technical scheme of the embodiment, the spot welding butt-joint device for butt-joint welding of pipelines further comprises a butt-joint adjusting device for butt-welding two butt-joint welding pipelines, the butt-joint adjusting device comprises a screw rod 17, a screw rod sleeve seat 18 and a rotating rod 19, the screw rod 17 is in threaded connection with the screw rod sleeve seat 18, the screw rod sleeve seat 18 is welded on a portal frame 16, the portal frame 16 is welded on a base 15, and the outer end of the base 15 is provided with a groove 21; the end part of the screw rod 17 is inserted in a sleeve 20, the sleeve 20 is welded in the middle of the outer side of the dovetail groove slide way 2 provided with the arc-section moving tile 10, and the rotating rod 19 is inserted in an insertion hole at the end part of the screw rod 17. This embodiment is used for supplementary correcting to mouthful when fracture dislocation volume is great, and through twisting one of them one end dislocation pipeline of screw jack-up and then supplementary segmental arc removal tile to mouthful correcting, the improvement is to mouthful welding quality that quality improves the butt joint.
EXAMPLE III
On the basis of the technical scheme of the embodiment, the spot welding butt-joint device for butt-joint welding of pipelines further comprises a hexagonal nut screwing device for screwing the disc hexagonal nut 3, wherein the hexagonal nut screwing device comprises an inner hexagonal sleeve 22, a stress application sleeve 25 and a stress application rod 24; the inner hexagonal sleeve 22 is provided with a bolt through hole 26, one end of the bolt through hole 26 is provided with a hexagonal hole 27 which can be sleeved on the disc hexagonal nut 3, the outer side of the other end of the bolt through hole 26 is welded with symmetrically distributed connecting rods 23, the connecting rods 23 are welded with the stress application sleeve 25, and the stress application rods 24 are inserted in the stress application sleeve 25. The embodiment is used for replacing a spanner to screw the disc hexagonal nut or the hexagonal nut, the occupied space of the screwing operation is small, the screwing force is large, the screwing device is particularly suitable for screwing long bolt nuts, and the screwing device is convenient and labor-saving.
Example four
The welding aligning process method using the spot welding aligning device comprises the following steps of:
step one, selecting a set of arc-section fixing tile 1, an arc-section moving tile 10 and an arc-section locking tile 9 which are consistent with the external diameter of a butt-jointed pipeline according to the external diameter of the butt-jointed pipeline, if the external diameter of the butt-jointed pipeline is 60mm, selecting a set of arc-section tiles capable of buckling the pipeline, and respectively inserting the arc-section fixing tile 1, the arc-section moving tile 10 and the arc-section locking tile 9 into a dovetail groove of a dovetail groove slideway 2;
welding one end of a section of new pipeline to be welded with one fracture, wherein the welding of the first weld joint can be finished by holding the new pipeline by hand without using a joint aligning device, and the length of the new pipeline to be welded is intercepted according to the actual welding requirement on site, so that the length of the new pipeline can meet the welding requirement, and the welding of the second weld joint cannot be carried out only if the ports of the two pipelines of the second weld joint are not concentric, so that the two ports of the pair of weld pipelines are not corrected to be concentric or approximately concentric, and the welding of the second weld joint cannot be carried out, so that the welding of the second weld joint with the staggered fracture needs to be corrected, and the ports of the two pipelines can be concentric or approximately concentric to carry out the welding of the second joint; firstly, buckling the arc-section fixing tile 1 on a pipeline far away from a supporting surface, wherein the buckling direction is consistent with a plane determined by central lines of the two pipelines, for example, if the two buried staggered pipelines are vertically staggered, buckling the arc-section fixing tile 1 right above the pipeline above, and enabling a butt joint of the two pipelines to be located in the middle of the rectangular spot welding hole 6 when buckling the arc-section fixing tile 1; then buckling the arc locking tile 9 and the arc fixing tile 1 on the pipeline far away from the supporting surface in opposite directions, and locking and fixing the arc locking tile and the arc fixing tile through bolts inserted in opposite narrow opposite buckling connecting lugs 8, wherein nuts matched with the bolts are outer hexagonal nuts;
buckling the arc section moving tile 10 and the arc section fixing tile 1 on another pipeline close to the supporting surface in an opposite direction, respectively penetrating four long correcting bolts 5 through connecting holes 11 of narrow butt-joint connecting lugs 8 of the arc section moving tile 10, embedding the hexagonal heads of the bolts into inner hexagonal counter bores 12, penetrating the other ends of the long correcting bolts 5 through correcting connecting holes 13 of wide butt-joint connecting lugs 4 of the arc section fixing tile 1, and sequentially screwing disc hexagonal nuts 3 matched with the long correcting bolts 5 by using a wrench or a hexagonal nut screwing device for pre-fastening; because the central lines of the two fracture dislocation pipelines are not parallel but intersect at a certain point, namely an included angle is formed between the two dislocation pipelines, the arc section moving tile 10 for fastening the butt joint and the four long correcting bolts 5 of the arc section fixing tile 1 are inclined, the aperture of the correcting connecting hole 13 on the wide butt joint lug 4 of the arc section fixing tile 1 is at least twice of the diameter of the long correcting bolt 5, so that the bolt in an inclined state can realize the butt joint locking; after the arc section moving tile 10 and the arc section fixing tile 1 are pre-fastened, welding and aligning correction are carried out; firstly screwing two groups of disc hexagonal nuts 3 close to one side of a welding butt joint, simultaneously screwing the two disc hexagonal nuts 3, or sequentially screwing the two disc hexagonal nuts 3 in a half-buckling manner, uniformly screwing, screwing one or two buckles of the two groups of disc hexagonal nuts 3 close to one side of the butt joint, then screwing the two groups of disc hexagonal nuts 3 far away from one side of the butt joint, sequentially and circularly screwing the two groups of disc hexagonal nuts 3 to enable the arc-section moving tile 10 to slowly move towards the arc-section fixing tile 1 and finally enable the two arc-section tiles to be buckled or basically buckled, enabling the buckled or basically buckled arc-section moving tile 10 and the arc-section fixing tile 1 to enable two butt-welded pipelines to be concentric or basically concentric, correcting staggered ports, and ensuring that the butt joints are in a corrected state before spot welding so as to ensure the welding quality of the butt joint welding;
if the fracture dislocation amount of two butt welding pipelines is large, namely the fracture dislocation displacement amount is larger than half of the diameter of the welded pipeline, the arc section moving tile 10 provided with the sleeve 20 is used, auxiliary weld crater correction is carried out by using a mouth aligning adjusting device, for a horizontal buried dislocation pipeline, the base 15 is placed on a supporting surface or a cushioned supporting surface, the lead screw 17 is screwed by the screwing rotary rod 19, so that the top end of the lead screw 17 is inserted into the sleeve 20, the lead screw 17 in threaded fit with the lead screw sleeve seat 18 is continuously and slowly screwed, and the arc section moving tile 10 is gradually jacked up by the lead screw 17 which rises continuously, so that auxiliary weld crater correction is carried out; for horizontal or vertical ground fracture dislocation pipelines, the support rod which is propped against the groove 21 on the base 15 is used as a support, and the cushioned support surface can also be used as a support to perform auxiliary correction of a welded junction;
fourthly, spot welding is carried out on butt seams of the welded junctions after locking correction, gaps between two sides of the buckled arc section fixed tile 1 and two sides of the arc section moving tile 10 are not smaller than 1cm, symmetrical rectangular spot welding holes 6 are respectively formed in the upper portion of the arc section fixed tile 1 and the middle of the arc section moving tile 10, the number of the rectangular spot welding holes 6 is four, two welding gaps are formed between the butt arc section moving tile 10 and the arc section fixed tile 1, six welding gaps which can be used for spot welding fixing are totally formed, the positions of the welding spots of spot welding are determined according to the site welding construction space, and at least two symmetrical welding spots are selected for spot welding fixing; because the arc-segment fixed tile 1 and the arc-segment movable tile 10 are made of copper materials, the arc-segment tiles are not welded with a butt welding pipeline during spot welding, the arc-segment tiles are convenient to disassemble, and in addition, the arc-segment tiles made of the copper materials do not damage the surface of the pipeline in the process of correcting and locking the opening;
and step five, after the pipelines which are welded in an opposite way are fixed in an opposite way through spot welding, disassembling the arc section fixing tile 1, the arc section moving tile 10 and the arc section locking tile 9, and welding the two pipelines together.
The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, which are not to be construed as limiting the invention to the specific embodiments described above. Numerous other simplifications or substitutions may be made without departing from the spirit of the invention as defined in the claims and the general concept thereof, which shall be construed to be within the scope of the invention.
Claims (1)
1. A butt joint method of a spot welding butt joint device is characterized in that: the spot welding butt joint device comprises an arc section fixing tile (1), an arc section moving tile (10) and an arc section locking tile (9), wherein the arc section fixing tile, the arc section moving tile and the arc section locking tile are made of copper materials; the arc-segment fixed tile (1), the arc-segment movable tile (10) and the arc-segment locking tile (9) are arranged in a dovetail groove of the dovetail groove slide way (2) through a dovetail slide block (7) arranged in the middle of the outer side of the arc-segment fixed tile; wide buckling connection lugs (4) and narrow buckling connection lugs (8) which are symmetrically distributed are arranged on two sides of a dovetail groove slide way (2) for mounting the arc-section fixing tile (1), the narrow buckling connection lugs (8) are in one group and are arranged at the bottom of the slide way, connection holes (11) are formed in two ends of each narrow buckling connection lug (8), the wide buckling connection lugs (4) are in two groups and are arranged above the narrow symmetrical connection lugs (8), and correction connection holes (13) are formed in two ends of each wide buckling connection lug (4); narrow opposite buckling connecting lugs (8) which are symmetrically distributed are arranged on two sides of a dovetail groove slide way (2) for mounting the arc-section locking tile (9), connecting holes (11) are arranged at two ends of each narrow opposite buckling connecting lug (8), and inner hexagonal counter bores (12) are arranged at the end parts of the connecting holes (11); two sides of a dovetail groove slide way (2) for installing the arc-section moving tile (10) are provided with two groups of narrow butt-joint connecting lugs (8) which are symmetrically distributed, two ends of each narrow butt-joint connecting lug (8) are provided with connecting holes (11), and the end part of each connecting hole (11) is provided with an inner hexagonal counter bore (12); symmetrical rectangular spot welding holes (6) are respectively formed in the upper part of the arc-section fixed tile (1) and the middle of the arc-section movable tile (10); the arc-section locking tile (9) and the bottom of the arc-section fixing tile (1) are locked and buckled on a pipeline through bolts, the arc-section moving tile (10) and the arc-section fixing tile (1) are buckled on two pipelines which are butt-welded through a long correcting bolt (5) and a disc hexagonal nut (3), and the butt-joint of the two pipelines is positioned in a rectangular spot welding hole (6);
the spot welding butt joint device also comprises a butt joint adjusting device for butt joint of two butt welding pipelines, the butt joint adjusting device comprises a screw rod (17), a screw rod sleeve seat (18) and a rotating rod (19), the screw rod (17) is in threaded connection with the screw rod sleeve seat (18), the screw rod sleeve seat (18) is welded on a portal frame (16), the portal frame (16) is welded on a base (15), and a groove (21) is formed in the outer end of the base (15); the end part of the screw rod (17) is inserted into a sleeve (20), the sleeve (20) is welded in the middle of the outer side of the dovetail groove slide way (2) provided with the arc-section moving tile (10), and the rotating rod (19) is inserted into an insertion hole in the end part of the screw rod (17);
the spot welding butt joint device further comprises a hexagonal nut screwing device for screwing a disc hexagonal nut (3), and the hexagonal nut screwing device comprises an inner hexagonal sleeve (22), a stress application sleeve (25) and a stress application rod (24); a bolt through hole (26) is formed in the inner hexagonal sleeve (22), a hexagonal hole (27) capable of being sleeved on the disc hexagonal nut (3) is formed in one end of the bolt through hole (26), symmetrically distributed connecting rods (23) are welded to the outer side of the other end of the bolt through hole (26), the connecting rods (23) are welded to the stress application sleeve (25), and the stress application rod (24) penetrates through the stress application sleeve (25);
a baffle ring (14) is arranged at one end of the hexagonal head of the disc hexagonal nut (3), and the outer diameter of the baffle ring is larger than the aperture of the correction connecting hole (13);
the arc-segment fixing tile (1), the arc-segment moving tile (10), the arc-segment locking tile (9) and the dovetail sliding block (7) are integrally formed or separately welded;
the radian of the arc sections of the arc section fixing tile (1), the arc section moving tile (10) and the arc section locking tile (9) is the same; after the arc-section fixed tile (1) and the arc-section movable tile (10) are buckled to a pipeline, the gap between tile bodies on two sides is not less than 1 cm; the included angle of two symmetrically distributed rectangular spot welding holes (6) on the arc section fixed tile (1) and the arc section movable tile (10) in the circumferential direction is 90 degrees; the width of the rectangular spot welding hole (6) is not less than 1cm, and the length of the rectangular spot welding hole is not less than 3 cm;
the sizes of the arc-section fixed tile (1), the arc-section movable tile (10) and the arc-section locking tile (9) are designed in groups according to the sizes and specifications of pipelines which are buckled with each other, and the arc-section tiles are at least designed into pipelines with the outer diameters of the buckles being 4cm, 5cm, 6cm, 7cm and 8 cm;
the pitch of the two correction connecting holes (13) on the two groups of wide opposite buckle connecting lugs (4) is the same as the pitch of the connecting holes (11) on the two groups of narrow opposite buckle connecting lugs (8); the aperture of the correction connecting hole (13) is at least twice of the diameter of the long correction bolt (5);
the top end of the dovetail groove bottom of the dovetail groove slide way (2) is open, and the bottom end of the dovetail groove bottom is sealed;
the mouth aligning method comprises the following steps:
step one, selecting a set of arc-section fixing tile (1), an arc-section moving tile (10) and an arc-section locking tile (9) which are consistent with the outer diameter of a butt-jointed pipeline according to the outer diameter of the butt-jointed pipeline, if the outer diameter of the butt-jointed pipeline is 60mm, selecting a set of arc-section tiles which can be buckled with the pipeline, and respectively inserting the arc-section fixing tile (1), the arc-section moving tile (10) and the arc-section locking tile (9) into a dovetail groove of a dovetail groove slide way (2);
step two, buckling the arc-section fixing tile (1) on the pipeline far away from the supporting surface, wherein the buckling position is consistent with a plane determined by the central lines of the two pipelines, and when the arc-section fixing tile (1) is buckled, the butt seam of the two pipelines is positioned in the middle of the rectangular spot welding hole (6); then buckling the arc locking tile (9) and the arc fixing tile (1) on the pipeline far away from the supporting surface in opposite directions, and locking and fixing the arc locking tile and the arc fixing tile through bolts inserted in opposite narrow opposite buckling connecting lugs (8), wherein nuts matched with the bolts are outer hexagonal nuts;
buckling the arc section moving tile (10) and the arc section fixing tile (1) on another pipeline close to the supporting surface in an opposite direction, respectively enabling four long correcting bolts (5) to penetrate through connecting holes (11) of narrow butt-joint connecting lugs (8) of the arc section moving tile (10), enabling hexagonal heads of the long correcting bolts (5) to be embedded into inner hexagonal counterbores (12), enabling the other ends of the long correcting bolts (5) to penetrate through correcting connecting holes (13) of wide butt-joint connecting lugs (4) of the arc section fixing tile (1), and sequentially screwing disc hexagonal nuts (3) matched with the long correcting bolts (5) by using a wrench or a hexagonal nut screwing device to perform pre-fastening; the arc section moving tile (10) and the arc section fixing tile (1) are pre-fastened and then welded to correct the opening; firstly screwing two disc hexagonal nuts (3) close to one side of the welding butt joint, simultaneously screwing the two disc hexagonal nuts (3), and also sequentially screwing the two disc hexagonal nuts (3) in a half-buckling manner, wherein the two disc hexagonal nuts are required to be uniformly screwed, when two disc hexagonal nuts (3) close to one side of the butt joint are screwed with one or two buckles, the two disc hexagonal nuts (3) far away from one side of the butt joint are screwed, the disc hexagonal nuts (3) are sequentially and circularly screwed to enable the arc section moving tile (10) to slowly move towards the arc section fixing tile (1) and finally enable the two arc section tiles to be buckled or basically buckled, the buckled or basically buckled arc section moving tile (10) and the arc section fixing tile (1) enable two pipelines welded in the butt joint to be concentric or basically concentric, and the staggered ports are corrected, the butt joint is ensured to be in a correction state before spot welding, so that the welding quality of butt welding is ensured;
if the dislocation displacement of the two welded pipeline fractures is larger than half of the diameter of the pipeline, using an arc section moving tile (10) provided with a sleeve (20), performing auxiliary weld joint correction by using a butt joint adjusting device, placing a base (15) on a supporting surface or a cushioned supporting surface for a horizontally buried dislocation pipeline, screwing a screw rod (17) through a screwing rotating rod (19), inserting the top end of the screw rod (17) into the sleeve (20), continuously and slowly screwing the screw rod (17) in threaded fit with a screw rod sleeve seat (18), and gradually jacking the arc section moving tile (10) through the continuously-rising screw rod (17) so as to perform auxiliary weld joint correction; for horizontal or vertical ground fracture dislocation pipelines, the supporting rod which is propped against the groove (21) on the base (15) is used as a support, and the propped supporting surface can also be used as a support to perform auxiliary correction on a welded junction;
fourthly, spot welding is carried out on butt seams of the welded junctions after locking correction, gaps on two sides of an arc section fixing tile (1) and an arc section moving tile (10) of the butt joint are not smaller than 1cm, symmetrical rectangular spot welding holes (6) are respectively formed in the upper portion of the arc section fixing tile (1) and the middle of the arc section moving tile (10), the number of the rectangular spot welding holes (6) is four, two welding gaps are formed between the arc section moving tile (10) of the butt joint and the arc section fixing tile (1), six welding gaps which can be used for spot welding fixation are totally formed, the positions of spot welding spots are determined according to the site welding construction space, and at least two symmetrical spot welding spots are selected for spot welding fixation; because the arc-section fixed tile (1) and the arc-section movable tile (10) are made of copper materials, the arc-section tile and a butt welding pipeline cannot be welded together during spot welding, the arc-section tile is convenient to disassemble, and in addition, the arc-section tile made of the copper materials cannot damage the surface of the pipeline in the process of correcting and locking the opening;
and fifthly, after the pipelines which are welded in an opposite mode are fixed in an opposite mode through spot welding, disassembling the arc section fixing tile (1), the arc section moving tile (10) and the arc section locking tile (9), and welding the two pipelines together.
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| CN201811389894.2A CN109604923B (en) | 2018-11-21 | 2018-11-21 | Spot welding aligning device and aligning method for pipeline aligning welding |
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| CN201811389894.2A CN109604923B (en) | 2018-11-21 | 2018-11-21 | Spot welding aligning device and aligning method for pipeline aligning welding |
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| DE102018115533A1 (en) * | 2018-06-27 | 2020-01-02 | Minimax Viking Research & Development Gmbh | Method for producing a number of pipes with a predetermined pipe diameter, pipe, and pipe system |
| CN113001103A (en) * | 2019-12-20 | 2021-06-22 | 郑州宏达汽车工业有限公司 | Rapid tank body assembling method for powder material transport vehicle |
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