CN102922096A - On-site assembly welding method for large aluminum tower - Google Patents
On-site assembly welding method for large aluminum tower Download PDFInfo
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- CN102922096A CN102922096A CN2012103984889A CN201210398488A CN102922096A CN 102922096 A CN102922096 A CN 102922096A CN 2012103984889 A CN2012103984889 A CN 2012103984889A CN 201210398488 A CN201210398488 A CN 201210398488A CN 102922096 A CN102922096 A CN 102922096A
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Abstract
The invention discloses a welding method, and provides an on-site assembly welding method for a large aluminum tower. The method is simple, production efficiency can be obviously improved, the labor intensity of workers can be greatly reduced, assembly tack welding and backing welding are integrated, the alignment tolerance of the aluminum tower is reduced, and the technical problems that the assembly welding process of the aluminum tower is complicated, time-consuming and labor-consuming, the deformation of the aluminum tower is large in the welding process, perpendicularity and the alignment tolerance are easily over-proof, the labor intensity of the workers is high, efficiency is low and the like in the prior art are solved. The method comprises the following steps of: correspondingly arranging jack support baffles on upper and lower towers; lifting the upper tower to the upper part of the lower tower, and adjusting the perpendicularity and the alignment tolerance; performing double-person synchronous argon arc welding at 0-degree and 180-degree scale marks of the upper and lower towers, forming a plurality of sections of short weld joints, and continuously adjusting the alignment tolerance in the period; performing filling welding on the short weld joints, welding gap joints among the short weld joints, and performing filling welding on the gap joints; and performing cosmetic welding.
Description
Technical field
The present invention relates to a kind of welding method, relate in particular to a kind of labour intensity of workman that can obviously improve production efficiency and decrease, group to point admittedly weld, backing welding combines together, reduces the Large size Aluminium tower field assembly welding method of aluminium tower unfitness of butt joint.
Background technology
The rectifying column that the pressure column that the nucleus equipment of large-scale aluminum air-separating plant is made by hydronalium, lower pressure column and main condenser form and crude argon column (being commonly referred to as the aluminium tower), general 3 to 5 meters of its diameter is highly generally above 50 meters.Because the intensity of hydronalium is relatively low, for ease of transportation with install, usually its segmentation is transported to the erecting bed after, within sky divides ice chest, carry out again vertical welding.Traditional welding method is to adopt goliath that upper tower crane is risen, recycling is welded in advance support platform on the tower wall and jack is set adjusts perpendicularity, then cooperate cranes that upper tower is supported according to upper tower height degree and 4 to 8 jack of weight placement, on the outer tower wall of docking site, weld at least simultaneously 8 anti-deformation stiffener, then butt welded seam welds, can produce unavoidably aluminium tower perpendicularity in the welding process, unfitness of butt joint is overproof, even produces the corner angle distortion; Again above-mentioned frock is removed one by one after seam welding to be welded is complete, and slice off support platform and anti-deformation stiffener, not only waste time and energy, the tower wall is also caused certain damage.
Chinese patent discloses welding method and the weldment (CN1360991A) thereof of a kind of high-pressure bottle bottom (head) and skirt, its process roughly comprises: between bottom (head) and skirt, make one with the interior annular element of rake angle of stretching as intermediate weldment, stretching the rake angle inversion in inciting somebody to action is enclosed within on the bottom (head), ring lower angle weld seam between welding rake angle and the bottom (head), postwelding upset back chipping, weld again the ring upper corners weld seam between main body upper end and the bottom (head), at last skirt is enclosed within on the baffle ring that stretches out inboard, main body lower end downwards, narrow outer wide groove, then back chipping behind the circumferential welded seam at bevel for welding place in forming between the two.The cost that art methods brings is high, efficient is low, consumptive material is many although this kind welding method effectively overcomes or alleviated, the shortcomings such as process complexity, and this kind welding method is only applicable to the welding of high-pressure bottle bottom (head) and skirt.
Summary of the invention
It is simple that the present invention has mainly provided a kind of operation, workman's the labour intensity that can obviously improve production efficiency and decrease, group to point admittedly weld, backing welding combines together, reduce the Large size Aluminium tower field assembly welding method of aluminium tower unfitness of butt joint, it is tired multiple to have solved the aluminium tower welding operation that exists in the prior art, wastes time and energy, welding process aluminium tower deflection is large, perpendicularity and unfitness of butt joint are easily overproof, and workman's labour intensity is high, the low technical problem that waits of efficient.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals: a kind of Large size Aluminium tower field assembly welding method comprises the steps:
1) the lower port outer edge at upper tower marks 0 ° and 180 ° of graduation marks, marks 0 ° and 180 ° of graduation marks at the upper port outer edge of lower tower;
2) calculate the theoretical unfitness of butt joint of upper and lower tower, and go out some centering graduation marks at the lower port outer edge of upper tower and the upper port outer edge correspondence markings of lower tower;
3) near on the outer ring surface of tower lower port along circumferential uniform welding tower jack supporting baffle on several, at several the lower tower jack baffle plates corresponding with upper tower jack supporting baffle of outer ring surface welding near lower tower upper port;
4) installation is descended tower and is adjusted perpendicularity, again with crane with upper tower crane to lower tower directly over, make 0 ° of graduation mark on the tower corresponding with 0 ° of graduation mark on the lower tower, 180 ° of graduation marks on the upper tower are corresponding with 180 ° of graduation marks on the lower tower, and jack is placed on respectively on the lower tower jack baffle plate, then make the corresponding overhead of the outer upper tower jack supporting baffle of tower lower port on jack;
5) utilize the gap between tower perpendicularity and Shang Ta and lower tower abutment joint in crane and the jack adjustment;
6) tack welding: take 0 ° of upper and lower tower and 180 ° of graduation mark positions as starting point, adopt double synchronous argon arc welding respectively, form equally distributed some sections short weld seams;
7) backing welding: respectively take 0 ° of upper and lower tower and 180 ° of graduation mark positions as starting point, adopt double synchronous argon arc welding again, the short weld seam in the step 6) is filled be soldered to nearly tower wall outer surface;
8) remove jack, upper and lower tower jack supporting baffle removes crane;
Intermittent weld between the short weld seam 9) welding step 7 again) makes end to end rear formation one closed circle of short weld seam between upper and lower tower;
10) intermittent weld in the step 9) is filled be soldered to nearly tower wall outer surface;
11) the whole piece weld seam between upper and lower tower is carried out cosmetic welding;
Wherein step 1) and step 2) can exchange, step 3) to step 11) in step 1) and step 2) afterwards the order carry out.
Unfitness of butt joint refers to the irregularity degree of the inside and outside wall of upper and lower tower, by the unfitness of butt joint adjustment (being commonly called as caulking) in traditional aluminium tower welding method and bottoming welding two procedures are united two into one, being about to 0 ° and 180 ° of two points carries out synchronously caulking and bottoming and welds, advantage is: the one, caulking and bottoming welding are carried out synchronously, on the one hand save the workload of welding and the dismounting of tooling fixture, thereby improved operating efficiency, reduced labour intensity; The 2nd, the caulking backing weld seam carries out reinforced welding, so that the ability of reinforcement weld seam resistance to deformation is higher than the welding stress of tower seam welding process far away, the overproof problem of unfitness of butt joint occurs thereby solved the aluminium tower in welding process; The 3rd, because the intensity of bottoming or reinforcement weld seam is enough to satisfy the supporting role to upper tower, so the crane holding time reduces more than 50% than conventional method; The 4th owing to cancelled the use of fixing and reinforcement tooling fixture, decrease welding job amount on the tower wall, compare with conventional method, tower wall welding capacity can reduce 80%, significantly improved aluminium tower group to quality.
As preferably, in the described step 6) process, detect in real time the variations in skews of centering graduation mark corresponding on the upper and lower tower, and adjust in the opposite direction increase unfitness of butt joint of centering graduation mark offset direction.Corresponding centering graduation mark generation variations in skews in welding process as on the upper and lower tower of discovery, namely by jack on the upper tower that protrudes or lower tower outside wall surface, namely by increasing unfitness of butt joint adjusts unfitness of butt joint in the other direction, to guarantee that unfitness of butt joint is in the margin of tolerance all the time in the caulking process, control method is simply effective.
As preferably, the short fusion length in the described step 6) is 100 to 120mm, and short weld spacing is 300 to 500 mm, and deposited metal thickness is 4 to 6mm.The long meeting of short fusion length increases deflection, and short fusion length can reduce the location and prevent the effect of welding deformation when too short, and enough deposited metal thickness has guaranteed the bonding strength of upper and lower tower.
As preferably, in described step 6) or the step 10), lack weld seam or intermittent weld and be filled to the upper and lower tower wall outer surface 1 of distance to 2mm.Reinforced welding occurs the overproof problem of unfitness of butt joint so that the ability of reinforcement weld seam resistance to deformation is higher than the welding stress of tower seam welding process far away thereby solved the aluminium tower in welding process.
Therefore, Large size Aluminium tower field assembly welding method of the present invention has following advantage: caulking and backing welding are united two into one, simplified operation, both saved tower wall counterpart tack welding operation, a large amount of auxiliary mould jig materials have been saved again, decrease workman's labour intensity removed simultaneously jig welding and welding to the damage of tower wall, the efficient high-quality is good, has especially solved and has been prone to the overproof problem of unfitness of butt joint in the welding process; Caulking is finished i.e. short weld seam bottoming welding and is finished, and can lay down jack and the whole load of crane to lacking after weld seam is filled welding again, and upper tower weight amount is born by short weld seam, and crane greatly reduces service time.
The specific embodiment:
Below by embodiment, technical scheme of the present invention is described in further detail.
Embodiment:
Large size Aluminium tower field assembly welding method of the present invention comprises the steps:
1) the lower port outer edge at upper tower marks 0 ° and 180 ° of graduation marks, marks 0 ° and 180 ° of graduation marks at the upper port outer edge of lower tower;
2) calculate the theoretical unfitness of butt joint of upper and lower tower, that is: the girth of unfitness of butt joint=upper and lower tower poor/pi/2, and satisfy unfitness of butt joint less than the standard code of tower wall thickness 20%, and go out some centering graduation marks at the lower port outer edge of upper tower and the upper port outer edge correspondence markings of lower tower;
3) near on the outer ring surface of tower lower port along tower jack supporting baffle in 4 of the circumferential uniform welding, at 4 the lower tower jack baffle plates corresponding with upper tower jack supporting baffle of outer ring surface welding near lower tower upper port;
4) installation is descended tower and is adjusted perpendicularity, again with crane with upper tower crane to lower tower directly over, 0 ° of graduation mark on the tower and 0 ° of graduation mark on the lower tower are aligned, 180 ° of graduation marks on the upper tower and 180 ° of graduation marks on the lower tower align, and jack is placed on respectively on the lower tower jack baffle plate, then make the corresponding overhead of the outer upper tower jack supporting baffle of tower lower port on jack;
5) by the gap between tower perpendicularity and Shang Ta in the jack adjustment and lower tower abutment joint, the gap was 8 ± 2mm, simultaneously upper tower perpendicularity is adjusted after crane unloaded 50%, made it in the simultaneously satisfied requirement less than the 8mm deviation of 4 directions of symmetry;
6) tack welding: respectively take 0 ° of upper and lower tower and 180 ° of graduation mark positions as starting point, adopt the double while and carry out clockwise or counterclockwise synchronous argon arc welding, form equally distributed some sections short weld seams, its short-and-medium fusion length is 110mm, short weld spacing is 400 mm, deposited metal thickness is 5 mm, and in welding process, need to detect in real time the variations in skews of centering graduation mark corresponding on the upper and lower tower, and adopt the opposite direction of jack in centering graduation mark offset direction to increase unfitness of butt joint and adjust;
7) backing welding: respectively take 0 ° of upper and lower tower and 180 ° of graduation mark positions as starting point, adopt double synchronous argon arc welding again, the short weld seam in the step 6) is filled be soldered to the upper and lower tower wall outer surface 1 of distance to 2mm;
8) remove jack, upper and lower tower jack supporting baffle removes crane;
Intermittent weld between the short weld seam 9) welding step 7 again) makes end to end rear formation one closed circle of short weld seam between upper and lower tower;
10) to the intermittent weld in the step 9) fill be soldered to the distance upper and lower tower wall outer surface 1 to 2mm;
11) the whole piece weld seam between upper and lower tower is carried out cosmetic welding;
Wherein step 1) and step 2) can exchange, step 3) to step 11) in step 1) and step 2) afterwards the order carry out.
Specific embodiment described herein only is to design of the present invention explanation for example.Those skilled in the art can make various modifications or replenish or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (4)
1. a Large size Aluminium tower field assembly welding method is characterized in that: comprise the steps:
1) the lower port outer edge at upper tower marks 0 ° and 180 ° of graduation marks, marks 0 ° and 180 ° of graduation marks at the upper port outer edge of lower tower;
2) calculate the theoretical unfitness of butt joint of upper and lower tower, and go out some centering graduation marks at the lower port outer edge of upper tower and the upper port outer edge correspondence markings of lower tower;
3) near on the outer ring surface of tower lower port along circumferential uniform welding tower jack supporting baffle on several, at several the lower tower jack baffle plates corresponding with upper tower jack supporting baffle of outer ring surface welding near lower tower upper port;
4) installation is descended tower and is adjusted perpendicularity, again with crane with upper tower crane to lower tower directly over, make 0 ° of graduation mark on the tower corresponding with 0 ° of graduation mark on the lower tower, 180 ° of graduation marks on the upper tower are corresponding with 180 ° of graduation marks on the lower tower, and jack is placed on respectively on the lower tower jack baffle plate, then make the corresponding overhead of the outer upper tower jack supporting baffle of tower lower port on jack;
5) utilize the gap between tower perpendicularity and Shang Ta and lower tower abutment joint in crane and the jack adjustment;
6) tack welding: take 0 ° of upper and lower tower and 180 ° of graduation mark positions as starting point, adopt double synchronous argon arc welding respectively, form equally distributed some sections short weld seams;
7) backing welding: respectively take 0 ° of upper and lower tower and 180 ° of graduation mark positions as starting point, adopt double synchronous argon arc welding again, the short weld seam in the step 6) is filled be soldered to nearly tower wall outer surface;
8) remove jack, upper and lower tower jack supporting baffle removes crane;
Intermittent weld between the short weld seam 9) welding step 7 again) makes end to end rear formation one closed circle of short weld seam between upper and lower tower;
10) intermittent weld in the step 9) is filled be soldered to nearly tower wall outer surface;
11) the whole piece weld seam between upper and lower tower is carried out cosmetic welding;
Wherein step 1) and step 2) can exchange, step 3) to step 11) in step 1) and step 2) afterwards the order carry out.
2. Large size Aluminium tower field assembly welding method according to claim 1, it is characterized in that: in the described step 6) process, detect in real time the variations in skews of centering graduation mark corresponding on the upper and lower tower, and adjust in the opposite direction increase unfitness of butt joint of centering graduation mark offset direction.
3. Large size Aluminium tower field assembly welding method according to claim 1 and 2 is characterized in that: the short fusion length in the described step 6) is 100 to 120mm, and short weld spacing is 300 to 500 mm, and deposited metal thickness is 4 to 6mm.
4. Large size Aluminium tower field assembly welding method according to claim 1 and 2 is characterized in that: in described step 6) or the step 10), lack weld seam or intermittent weld and be filled to the upper and lower tower wall outer surface 1 of distance to 2mm.
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| CN201210398488.9A CN102922096B (en) | 2012-10-19 | 2012-10-19 | Large size Aluminium tower field assembly welding method |
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| CN201210398488.9A CN102922096B (en) | 2012-10-19 | 2012-10-19 | Large size Aluminium tower field assembly welding method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567601A (en) * | 2013-11-12 | 2014-02-12 | 中国化学工程第三建设有限公司 | Method for welding tower in vertical assembling mode by utilizing jacks and crane |
| CN104191125A (en) * | 2014-08-19 | 2014-12-10 | 中冶天工上海十三冶建设有限公司 | Container assembly mobile type stagger joint adjusting ejector tool |
| CN105618926A (en) * | 2016-02-29 | 2016-06-01 | 上海十三冶建设有限公司 | System inflation welding method for stainless steel pipeline in large air separation cold box |
| CN110900021A (en) * | 2019-11-28 | 2020-03-24 | 中国化学工程第三建设有限公司 | Reactor assembly welding method in narrow space of dehydrogenation device frame |
| CN113199116A (en) * | 2021-04-21 | 2021-08-03 | 中国化学工程第三建设有限公司 | Method for welding aluminum fractionating tower in cold box in assembling mode |
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| CN1360991A (en) * | 2000-12-29 | 2002-07-31 | 中国石油化工集团公司 | Welding process and welded part of bottom and skirt support for high pressure container |
| CN101338965A (en) * | 2008-01-31 | 2009-01-07 | 杭州福斯达气体设备有限公司 | Medium air separation equipment fractionating tower cold box assembling method |
| DE102010041807A1 (en) * | 2010-09-30 | 2012-04-05 | Siemens Aktiengesellschaft | Method for connecting hollow cylindrical elements of tower of wind-power plant e.g. wind turbine, involves forming circumferential gap between cylindrical elements to connect cylindrical elements that are welded together at end faces |
| CN102615492A (en) * | 2012-04-20 | 2012-08-01 | 陕西建工集团设备安装工程有限公司 | Hoisting butt joint method of tower-like containers |
| CN102654349A (en) * | 2012-04-20 | 2012-09-05 | 苏州制氧机有限责任公司 | Lower tower barrel joint device of copious cooling air separation equipment |
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2012
- 2012-10-19 CN CN201210398488.9A patent/CN102922096B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1360991A (en) * | 2000-12-29 | 2002-07-31 | 中国石油化工集团公司 | Welding process and welded part of bottom and skirt support for high pressure container |
| CN101338965A (en) * | 2008-01-31 | 2009-01-07 | 杭州福斯达气体设备有限公司 | Medium air separation equipment fractionating tower cold box assembling method |
| DE102010041807A1 (en) * | 2010-09-30 | 2012-04-05 | Siemens Aktiengesellschaft | Method for connecting hollow cylindrical elements of tower of wind-power plant e.g. wind turbine, involves forming circumferential gap between cylindrical elements to connect cylindrical elements that are welded together at end faces |
| CN102615492A (en) * | 2012-04-20 | 2012-08-01 | 陕西建工集团设备安装工程有限公司 | Hoisting butt joint method of tower-like containers |
| CN102654349A (en) * | 2012-04-20 | 2012-09-05 | 苏州制氧机有限责任公司 | Lower tower barrel joint device of copious cooling air separation equipment |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567601A (en) * | 2013-11-12 | 2014-02-12 | 中国化学工程第三建设有限公司 | Method for welding tower in vertical assembling mode by utilizing jacks and crane |
| CN103567601B (en) * | 2013-11-12 | 2015-12-09 | 中国化学工程第三建设有限公司 | Utilize jack welding tower vertical with crane method |
| CN104191125A (en) * | 2014-08-19 | 2014-12-10 | 中冶天工上海十三冶建设有限公司 | Container assembly mobile type stagger joint adjusting ejector tool |
| CN105618926A (en) * | 2016-02-29 | 2016-06-01 | 上海十三冶建设有限公司 | System inflation welding method for stainless steel pipeline in large air separation cold box |
| CN105618926B (en) * | 2016-02-29 | 2018-04-03 | 上海十三冶建设有限公司 | The system inflation welding method of stainless steel pipes in Large Air Separation Devices ice chest |
| CN110900021A (en) * | 2019-11-28 | 2020-03-24 | 中国化学工程第三建设有限公司 | Reactor assembly welding method in narrow space of dehydrogenation device frame |
| CN113199116A (en) * | 2021-04-21 | 2021-08-03 | 中国化学工程第三建设有限公司 | Method for welding aluminum fractionating tower in cold box in assembling mode |
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| CN102922096B (en) | 2015-12-09 |
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