CN101396757A - Storage-tank transverse-seam automatic welding rendering two-sides forming welding method - Google Patents
Storage-tank transverse-seam automatic welding rendering two-sides forming welding method Download PDFInfo
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- CN101396757A CN101396757A CNA2008100511853A CN200810051185A CN101396757A CN 101396757 A CN101396757 A CN 101396757A CN A2008100511853 A CNA2008100511853 A CN A2008100511853A CN 200810051185 A CN200810051185 A CN 200810051185A CN 101396757 A CN101396757 A CN 101396757A
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Abstract
An automatic welding backing double-side shaping welding method for transverse joints of a storage tank comprises edge preparation, assembling and back cleaning, and is characterized in that a welding fluid is used for protecting the back surface when welding is carried out after assembling. The welding method guarantees backing (root) welding back surface shaping (double-side shaping), cancels carbon arc air gouging, and reduces more than 80% of grinding wheel polishing, thereby not only economizing on manpower, reducing the labor intensity of operators, saving 50.6% of labor cost, but also eliminating the inhalation of powdered carbon by carbon arc air gouging workers, reducing the air pollution, and simultaneously saving carbon rods, welding materials filling at air gouging rooting parts and grinding wheel sheets polished by grinding wheels, and guaranteeing the welding quality. The average radiographic inspection first-time qualification rate of transverse joints of two storage tank is 98.2%.
Description
Technical field
The present invention relates to the welding method of a kind of storage-tank transverse-seam or similar transverse joint, especially relate to a kind of Lincoln weld method of storage-tank transverse-seam.
Background technology
In order to evade the risk that national oil supply is not enough or interrupt, ensure the medium-term and long-term oil supply safety of China, country has strengthened the crude stockpile storehouse construction more than 1,000,000 tons.Traditional storage tank installation method adopts transverse joint Lincoln weld, bottoming (root) postwelding back side carbon arc air gouging back chipping, and grinder buffing, workload is big, and operator's condition of work is more abominable, and gouge has carbon dust to pollute.Therefore, further improve storage-tank transverse-seam automatic welding technique level, make that it is more efficient, high-quality, reduction labour intensity, to improve operating environment be a new problem.
Summary of the invention
Technical problem to be solved by this invention provides the method that a kind of back side adds the solder flux protection; this method has guaranteed bottoming (root) weldering back-welding shape (two-sides forming); cancellation back side gouge back chipping operation; improve the bottoming welding efficiency greatly; reduce labour intensity, the operating environment that significantly improves the operator pollutes.
For solving the problems of the technologies described above, the invention provides a kind of storage-tank transverse-seam automatic welding rendering two-sides forming welding method, comprise that groove processing, group to, back side cleaning, is characterized in that: when welding finishing after, the back side adds solder flux protection in group.
Welding method of the present invention has guaranteed bottoming (root) weldering back-welding shape (two-sides forming), the cancellation carbon arc air gouging, reduce the grinder buffing amount more than 80%, not only save manpower, reduce operator's labour intensity, save labour cost 50.6%, and the suction of stopping carbon arc air gouging worker carbon dust, reduce air pollution, save carbon-point simultaneously, fill the welding material of gouge back chipping part and the grinding wheel of grinder buffing, guarantee welding quality, two average radiographic inspection first-time qualification rates 98.2% of storage-tank transverse-seam.
Further specify effect of the present invention below by Application Example
Application Example 1
With the oil plant 50000m of Urumchi, Xinjiang petro-chemical corporation
3The construction of x2 petroleum tank project can body is example: this project is totally 4 50000m
3Petroleum tank, my company undertakes the construction of 2, and associate organization undertakes the construction of 2.My company drops into manually altogether: 103 people, duration: 58 days; Associate organization drops into 178 people altogether, the duration: 68 days.10 days in advance duration.
A. the labour cost of Jie Yueing: by PetroChina Company Limited.'s quota labour cost is 44.5+44.5 * 1.79=124.155 unit/sky, so this engineering is compared with associate organization, saves labour cost altogether: (178 * 68-103 * 58) * 124.155=761070.15 unit.Saving rate: 50.6%.
B. the crane machine-team of Jie Yueing takes: by PetroChina Company Limited.'s quota, 50 tons of crawler cranes, 10 * 1364.09=13640.9 unit; 25 tons of truck cranes, 10 * 1098=10980 unit adds up to: 24620.9 yuan.Saving rate: 14.7%.
Because the construction that country has strengthened the crude stockpile storehouse, the oil tank installation is increasing.This worker's method makes solder technology level that oil tank installs high-quality, efficient more.Reduction of erection time, save manpower, raise the efficiency, guarantee welding quality, two average radiographic inspection first-time qualification rates 98.2% of storage-tank transverse-seam.This technology cancellation carbon arc air gouging reduces the grinder buffing amount more than 80%, stops the suction of carbon arc air gouging worker carbon dust, reduces air pollution.Compare with traditional submerged-arc welding, can shorten the construction period widely.As the oil plant 50000m of Urumchi, Xinjiang petro-chemical corporation
32 10 days petroleum tank project cocondensation casual labourer's phases of x.This technology is compared with traditional submerged-arc welding, and the cancellation carbon arc air gouging reduces the grinder buffing amount, not only saves manpower, and reduces operator's labour intensity.This technology cancellation carbon arc air gouging operation is saved carbon-point, is filled the welding material of gouge back chipping part and the grinding wheel of grinder buffing.
Application Example 2
The international Duolun of Datang is produced 460000 tons of coal-based alkene project three-in-one unit tank field projects per year and is used, and is subjected to the favorable comment of owner and management.
The specific embodiment
Embodiment 1
Groove processing adopts the numerical control cutting machine time processing to be shaped, and uses grinder buffing, makes it expose metallic luster; Group is 2.5mm to the gap, and tack welding adopts manual electric arc welding, and jar outside is every 300mm spot welding 40mm in the front; Along the circumferential direction uniform four manipulators, equidirectional, welding simultaneously, welding parameter should be consistent, and welding parameter: voltage is 22V, and electric current is 380A, the speed of travel is 350mm/min, and the welding gun angle is 15 °, simultaneously the flux delivery retracting device is set overleaf and reaches welding protection; Adopt electric hammer cleaning back side coating, handle with grinder buffing at the uneven position of partial plastic forming simultaneously.
Embodiment 2
Groove processing adopts the numerical control cutting machine time processing to be shaped, and uses grinder buffing, makes it expose metallic luster; Group is 2.8mm to the gap, and tack welding adopts manual electric arc welding, and jar outside is every 320mm spot welding 50mm in the front; Along the circumferential direction uniform four manipulators, equidirectional, welding simultaneously, welding parameter should be consistent, and welding parameter: voltage is 24V, and electric current is 400A, the speed of travel is 450mm/min, and the welding gun angle is 18 °, simultaneously the flux delivery retracting device is set overleaf and reaches welding protection; Adopt electric hammer cleaning back side coating, handle with grinder buffing at the uneven position of partial plastic forming simultaneously.
Embodiment 3
Groove processing adopts the numerical control cutting machine time processing to be shaped, and uses grinder buffing, makes it expose metallic luster; Group is 3.7mm to the gap, and tack welding adopts manual electric arc welding, in the positive jar of outside every 330mm, spot welding 55mm; Along the circumferential direction uniform four manipulators, equidirectional, welding simultaneously, welding parameter should be consistent, and welding parameter: voltage is 25V, and electric current is 400A, the speed of travel is 450mm/min, and the welding gun angle is 20 °, simultaneously the flux delivery retracting device is set overleaf and reaches welding protection; Adopt electric hammer cleaning back side coating, handle with grinder buffing at the uneven position of partial plastic forming simultaneously.
Embodiment 4
Groove processing adopts the numerical control cutting machine time processing to be shaped, and uses grinder buffing, makes it expose metallic luster; Group is 4.5mm to the gap, and tack welding adopts manual electric arc welding, and jar outside is every 350mm spot welding 60mm in the front; Along the circumferential direction uniform four manipulators, equidirectional, welding simultaneously, welding parameter should be consistent, and welding parameter: voltage is 26V, and electric current is 420A, the speed of travel is 500mm/min, and the welding gun angle is 20 °, simultaneously the flux delivery retracting device is set overleaf and reaches welding protection; Adopt electric hammer cleaning back side coating, handle with grinder buffing at the uneven position of partial plastic forming simultaneously.
Technological principle: the submerged-arc welding seam moulding is because the protection of slag is arranged, and constitutes a cavity in arc region by metal and flux vapors, and electric arc is smooth combustion in this cavity just, and the deposite metal is not contacted with air.But because the solder flux that submerged-arc welding is adopted is a graininess, so its optimal welding position is downhand welding and angle welding, the welding of other position then must adopt special device to guarantee the covering in solder flux butt welded seam district.It is the horizontal position that storage tank is installed submerged-arc welding, and traditional submerged arc horizontal position welding only front has the solder flux protection, and back-protective is bad during backing welding, and the back-welding shape difference needs the gouge back chipping.By manipulator is improved, to hang one at the manipulator back side and fill up the solder flux manipulator, its shape follows the front-operated machine identical, has only flux delivery and recovery system, and the assurance backing welding back side is carried and is reclaimed solder flux and welds synchronous.
Claims (3)
1, a kind of storage-tank transverse-seam automatic welding rendering two-sides forming welding method comprises that groove processing, group to, back side cleaning, is characterized in that: when welding finishing after, the back side adds solder flux protection synchronously in group.
2, storage-tank transverse-seam automatic welding rendering two-sides forming welding method according to claim 1 is characterized in that: group is 2.5～4.5mm to the gap, and tack welding adopts manual electric arc welding, in the positive jar of outside every 300～350mm, spot welding 40～60mm.
3, storage-tank transverse-seam automatic welding rendering two-sides forming welding method according to claim 1, it is characterized in that: along the circumferential direction uniform four manipulators during welding, equidirectional welding simultaneously, welding parameter should be consistent, welding parameter: voltage is 22-26V, electric current is 380-420A, and the speed of travel is 350-500mm/min, and the welding gun angle is 15-20 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100511853A CN101396757A (en) | 2008-09-12 | 2008-09-12 | Storage-tank transverse-seam automatic welding rendering two-sides forming welding method |
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| CNA2008100511853A CN101396757A (en) | 2008-09-12 | 2008-09-12 | Storage-tank transverse-seam automatic welding rendering two-sides forming welding method |
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| CN101396757A true CN101396757A (en) | 2009-04-01 |
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| CNA2008100511853A Pending CN101396757A (en) | 2008-09-12 | 2008-09-12 | Storage-tank transverse-seam automatic welding rendering two-sides forming welding method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102126062A (en) * | 2011-01-07 | 2011-07-20 | 蓬莱巨涛海洋工程重工有限公司 | Secondary repair process method of high-strength steel welds |
| CN107042366A (en) * | 2016-12-14 | 2017-08-15 | 柳州振业焊接机电设备制造有限公司 | The method of automatic welding |
-
2008
- 2008-09-12 CN CNA2008100511853A patent/CN101396757A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102126062A (en) * | 2011-01-07 | 2011-07-20 | 蓬莱巨涛海洋工程重工有限公司 | Secondary repair process method of high-strength steel welds |
| CN102126062B (en) * | 2011-01-07 | 2012-12-26 | 蓬莱巨涛海洋工程重工有限公司 | Secondary repair process method of high-strength steel welds |
| CN107042366A (en) * | 2016-12-14 | 2017-08-15 | 柳州振业焊接机电设备制造有限公司 | The method of automatic welding |
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Open date: 20090401 |