CN102922096B - Large size Aluminium tower field assembly welding method - Google Patents
Large size Aluminium tower field assembly welding method Download PDFInfo
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Abstract
The invention discloses a kind of welding method, provide operation simple, production efficiency can be significantly improved and considerably reduce the labour intensity of workman, group to point is welded admittedly, backing welding combines together, reduce the Large size Aluminium tower field assembly welding method of aluminium tower unfitness of butt joint, solve the aluminium tower welding operation existed in prior art tired multiple, waste time and energy, welding process aluminium tower deflection is large, perpendicularity and unfitness of butt joint are easily overproof, the labour intensity of workman is high, the technical problems such as efficiency is low, its process roughly comprises, first by upper, on lower tower, correspondence arranges jack supporting baffle, again upper tower crane is transported to adjustment perpendicularity and unfitness of butt joint after above lower tower, adopt double synchronous argon arcs at 0 ° of upper and lower tower and 180 ° of positions and form some sections short weld seams, and period constantly regulates unfitness of butt joint, again weldering is filled to short weld seam, then the gapped seam between short weld seam is welded, again weldering is filled to gapped seam, finally carry out cosmetic welding.
Description
Technical field
The present invention relates to a kind of welding method, particularly relate to a kind of labour intensity significantly improving production efficiency and considerably reduce workman, group to point is welded admittedly, backing welding combines together, reduce the Large size Aluminium tower field assembly welding method of aluminium tower unfitness of butt joint.
Background technology
The rectifying column that pressure column, lower pressure column and main condenser that the nucleus equipment of large-scale aluminum air-separating plant is made up of hydronalium form and crude argon column (being commonly referred to as aluminium tower), general 3 to 5 meters of its diameter, highly generally more than 50 meters.Because the intensity of hydronalium is relatively low, for ease of transport with install, usually by after its fragmented transport to erecting bed, then divide in ice chest at sky and carry out vertical welding.Traditional welding method adopts goliath to be risen by upper tower crane, the recycling support platform be welded in advance on tower wall arranges jack to adjust perpendicularity, then placing 4 to 8 jack according to upper tower height degree and weight coordinates crane to support upper tower, on the outer tower wall of docking site, at least weld the anti-deformation stiffener of 8 pieces simultaneously, then butt welded seam welds, aluminium tower perpendicularity can be produced unavoidably in welding process, unfitness of butt joint is overproof, even produce corner angle distortion; Again above-mentioned frock is removed one by one after seam welding to be welded, and slice off support platform and anti-deformation stiffener, not only waste time and energy, certain damage is also caused to tower wall.
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 stretching rake angle as intermediate weldment, by interior stretch rake angle be inverted be enclosed within bottom (head), a ring lower angle weld seam between welding rake angle and bottom (head), postwelding upset back chipping, weld the ring upper corners weld seam between main body upper end and bottom (head) again, finally skirt is enclosed within baffle ring that main body lower end inside stretches out downwards, narrow outer wide groove in being formed between the two, back chipping after the circumferential welded seam at then bevel for welding place.Although this kind of welding method effectively overcome or alleviates the shortcomings such as the cost that art methods brings is high, efficiency is low, consumptive material is many, and process is complicated, this kind of welding method is only applicable to welding of high-pressure bottle bottom (head) and skirt.
Summary of the invention
It is simple that the present invention mainly provides a kind of operation, production efficiency can be significantly improved and considerably reduce the labour intensity of workman, group to point is welded admittedly, backing welding combines together, reduce the Large size Aluminium tower field assembly welding method of aluminium tower unfitness of butt joint, solve the aluminium tower welding operation existed in prior art tired multiple, waste time and energy, welding process aluminium tower deflection is large, perpendicularity and unfitness of butt joint are easily overproof, and the labour intensity of workman is high, the technical problem of the low grade of efficiency.
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) mark 0 ° and 180 ° of graduation marks at the lower port outer edge of upper tower, mark 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 tower lower port outer ring surface on circumferentially uniform welding tower jack supporting baffle on several, the outer ring surface near lower tower upper port welds several lower tower jack baffle plates corresponding with upper tower jack supporting baffle;
4) lower tower be installed and adjust perpendicularity, again with crane by upper tower crane to directly over lower tower, make on tower 0 ° of graduation mark corresponding with 0 ° of graduation mark on lower tower, 180 ° of graduation marks on upper tower are corresponding with 180 ° of graduation marks on lower tower, and jack is placed on respectively on lower tower jack baffle plate, then make the corresponding overhead of the upper tower jack supporting baffle outside tower lower port on jack;
5) crane and jack adjustment above tower perpendicularity and the gap between Shang Ta and lower tower abutment joint is utilized;
6) tack welding: respectively with 0 of upper and lower tower ° and 180 ° of graduation mark positions for starting point, adopt double synchronous argon arc welding, form equally distributed some sections short weld seams;
7) backing welding: more respectively with 0 of upper and lower tower ° and 180 ° of graduation mark positions for starting point, adopt double synchronous argon arc welding, filling carried out to the short weld seam in step 6) and is soldered to nearly tower wall outer surface;
8) remove jack, upper and lower tower jack supporting baffle, removes crane;
9) welding step 7 again) in short weld seam between intermittent weld, make end to end rear formation one closed circle of short weld seam between upper and lower tower;
10) filling is carried out to the intermittent weld in step 9) and be soldered to nearly tower wall outer surface;
11) cosmetic welding is carried out to the whole piece weld seam between upper and lower tower;
Step 1) wherein and step 2) can exchange, step 3) to step 11) in step 1) and step 2) after order carry out.
Unfitness of butt joint refers to the irregularity degree of wall inside and outside upper and lower tower, by 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, caulking and bottoming welding is synchronously carried out by 0 ° and 180 ° of two points, advantage is: one is that caulking and bottoming welding are synchronously carried out, on the one hand save the welding of tooling fixture and the workload of dismounting, thus improve operating efficiency, reduce labour intensity; Two is that caulking backing weld seam carries out reinforced welding, makes the ability of reinforcement weld seam resistance to deformation far away higher than the welding stress of tower seam welding process, thus solves aluminium tower in welding process, occur the problem that unfitness of butt joint is overproof; Three is that therefore crane holding time reduces more than 50% than conventional method because the intensity of bottoming or reinforcement weld seam is enough to meet the supporting role to upper tower; Four is the uses owing to eliminating fixing and reinforcement tooling fixture, and considerably reduce welding job amount on tower wall, compared with conventional method, tower wall welding capacity can reduce 80%, significantly improves aluminium tower group to quality.
As preferably, in described step 6) process, detect the variations in skews of centering graduation mark corresponding on upper and lower tower in real time, and the opposite direction increase unfitness of butt joint in centering graduation mark offset direction adjusts.As found centering graduation mark generation variations in skews corresponding on upper and lower tower in welding process, namely by jack protrude upper tower or lower tower outside wall surface on, namely unfitness of butt joint is adjusted by increasing unfitness of butt joint in the other direction, to guarantee that in caulking process, unfitness of butt joint is in the margin of tolerance all the time, control method is simply effective.
As preferably, the short fusion length in described step 6) is 100 to 120mm, and short weld spacing is 300 to 500mm, and deposited metal thickness is 4 to 6mm.The long meeting of short fusion length makes deflection increase, and can reduce the effect locating and prevent welding deformation when short fusion length is too short, enough deposited metal thickness ensure that the bonding strength of upper and lower tower.
As preferably, in described step 6) or step 10), short weld seam or intermittent weld are filled to apart from upper and lower tower wall outer surface 1 to 2mm.Reinforced welding makes the ability of reinforcement weld seam resistance to deformation far away higher than the welding stress of tower seam welding process, thus solves aluminium tower in welding process, occur the problem that unfitness of butt joint is overproof.
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, simplify operation, both tower wall counterpart tack welding operation had been saved, in turn save a large amount of auxiliary mould jig material, the labour intensity considerably reducing workman eliminates jig welding and the damage of welding to tower wall simultaneously, and efficiency high-quality is good, especially solves in welding process and easily occurs the problem that unfitness of butt joint is overproof; Caulking completes i.e. short weld seam bottoming and has welded, then can lay down jack and the whole load of crane after carrying out filling welding to short weld seam, and upper tower weight amount is born by short weld seam, and crane greatly reduces service time.
detailed description of the invention:
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) mark 0 ° and 180 ° of graduation marks at the lower port outer edge of upper tower, mark 0 ° and 180 ° of graduation marks at the upper port outer edge of lower tower;
2) the theoretical unfitness of butt joint of upper and lower tower is calculated, that is: the girth difference/pi/2 of unfitness of butt joint=upper and lower tower, and meet the standard regulation that unfitness of butt joint is less than 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 tower lower port outer ring surface on circumferentially tower jack supporting baffle in uniform welding 4, the lower tower jack baffle plate that welding 4 is corresponding with upper tower jack supporting baffle on the outer ring surface near lower tower upper port;
4) lower tower be installed and adjust perpendicularity, again with crane by upper tower crane to directly over lower tower, 0 ° of graduation mark on tower 0 ° of graduation mark and lower tower is aligned, 180 ° of graduation marks on upper tower and 180 ° of graduation marks on lower tower align, and jack is placed on respectively on lower tower jack baffle plate, then make the corresponding overhead of the upper tower jack supporting baffle outside tower lower port on jack;
5) adjust upper tower perpendicularity and the gap between Shang Ta and lower tower abutment joint by jack after crane unloading 50%, gap is 8 ± 2mm, adjusts upper tower perpendicularity simultaneously, makes its 4 directions in symmetry meet the requirement being less than 8mm deviation simultaneously;
6) tack welding: respectively with 0 of upper and lower tower ° and 180 ° of graduation mark positions for starting point, synchronous argon arc welding is carried out clockwise or counterclockwise while of adopting double, form equally distributed some sections short weld seams, its short-and-medium fusion length is 110mm, short weld spacing is 400mm, deposited metal thickness is 5mm, and in welding process, need the variations in skews detecting centering graduation mark corresponding on upper and lower tower in real time, and adopt the opposite direction increase unfitness of butt joint of jack in centering graduation mark offset direction to adjust;
7) backing welding: more respectively with 0 of upper and lower tower ° and 180 ° of graduation mark positions for starting point, adopt double synchronous argon arc welding, filling carried out to the short weld seam in step 6) and is soldered to apart from upper and lower tower wall outer surface 1 to 2mm;
8) remove jack, upper and lower tower jack supporting baffle, removes crane;
9) welding step 7 again) in short weld seam between intermittent weld, make end to end rear formation one closed circle of short weld seam between upper and lower tower;
10) carrying out filling to the intermittent weld in step 9) is soldered to apart from upper and lower tower wall outer surface 1 to 2mm;
11) cosmetic welding is carried out to the whole piece weld seam between upper and lower tower;
Step 1) wherein and step 2) can exchange, step 3) to step 11) in step 1) and step 2) after order carry out.
Specific embodiment described herein is only to design of the present invention explanation for example.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (4)
1. a Large size Aluminium tower field assembly welding method, is characterized in that: comprise the steps:
1) mark 0 ° and 180 ° of graduation marks at the lower port outer edge of upper tower, mark 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 tower lower port outer ring surface on circumferentially uniform welding tower jack supporting baffle on several, the outer ring surface near lower tower upper port welds several lower tower jack baffle plates corresponding with upper tower jack supporting baffle;
4) lower tower be installed and adjust perpendicularity, again with crane by upper tower crane to directly over lower tower, make on tower 0 ° of graduation mark corresponding with 0 ° of graduation mark on lower tower, 180 ° of graduation marks on upper tower are corresponding with 180 ° of graduation marks on lower tower, and jack is placed on respectively on lower tower jack baffle plate, then make the corresponding overhead of the upper tower jack supporting baffle outside tower lower port on jack;
5) crane and jack adjustment above tower perpendicularity and the gap between Shang Ta and lower tower abutment joint is utilized;
6) tack welding: respectively with 0 of upper and lower tower ° and 180 ° of graduation mark positions for starting point, adopt double synchronous argon arc welding, form equally distributed some sections short weld seams;
7) fill weldering: more respectively with 0 of upper and lower tower ° and 180 ° of graduation mark positions for starting point, adopt double synchronous argon arc welding, filling carried out to the short weld seam in step 6) and is soldered to nearly tower wall outer surface;
8) remove jack, upper and lower tower jack supporting baffle, removes crane;
9) welding step 7 again) in short weld seam between intermittent weld, make end to end rear formation one closed circle of short weld seam between upper and lower tower;
10) filling is carried out to the intermittent weld in step 9) and be soldered to nearly tower wall outer surface;
11) cosmetic welding is carried out to the whole piece weld seam between upper and lower tower;
Step 1) wherein and step 2) can exchange, step 3) to step 11) in step 1) and step 2) after order carry out.
2. Large size Aluminium tower field assembly welding method according to claim 1, it is characterized in that: in described step 6) process, the variations in skews of centering graduation mark corresponding on the upper and lower tower of real-time detection, and the opposite direction increase unfitness of butt joint in centering graduation mark offset direction adjusts.
3. Large size Aluminium tower field assembly welding method according to claim 1 and 2, it is characterized in that: the short fusion length in described step 6) is 100 to 120mm, short weld spacing is 300 to 500mm, 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 step 10), short weld seam or intermittent weld are filled to apart from upper and lower tower wall outer surface 1 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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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104191125B (en) * | 2014-08-19 | 2016-01-20 | 中冶天工上海十三冶建设有限公司 | Container group is to portable unfitness of butt joint adjustment top tool |
| 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 |
| CN110900021B (en) * | 2019-11-28 | 2021-07-30 | 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 |
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