CN113878256A - Automatic welding method for small and medium-sized vertical storage tank - Google Patents
Automatic welding method for small and medium-sized vertical storage tank Download PDFInfo
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- CN113878256A CN113878256A CN202111020877.3A CN202111020877A CN113878256A CN 113878256 A CN113878256 A CN 113878256A CN 202111020877 A CN202111020877 A CN 202111020877A CN 113878256 A CN113878256 A CN 113878256A
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- 238000003466 welding Methods 0.000 title claims abstract description 218
- 238000003860 storage Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 39
- 210000001503 joint Anatomy 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 238000012545 processing Methods 0.000 claims abstract description 10
- 239000000919 ceramic Substances 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 230000008569 process Effects 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 4
- 238000010276 construction Methods 0.000 description 21
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 15
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
- 230000009193 crawling Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
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- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
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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
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
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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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/12—Vessels
- B23K2101/125—Cans
Abstract
An automatic welding method for small and medium-sized vertical storage tanks comprises the following steps: the middle web of the bottom plate is welded in a lap joint mode or in a butt joint mode, the edge plates are welded in a butt joint mode, and the edge plates and the middle web are welded in a lap joint mode; flat steel is used as a base plate below the butt welding seam of the bottom plate; welding by using a gas shielded welding machine, wherein intermittent welding is arranged from the center to two sides during welding; and controlling the inner and outer side gaps when the edge plates are welded. Welding longitudinal welding seams of the wall plate: a trackless automatic creeping gas-electric vertical welding machine is adopted; controlling the assembly gap between adjacent arc-shaped wall plates; an automatic beveling machine is adopted to make a bevel; and processing the longitudinal welding seam of the wall plate into a V-shaped groove, and welding and forming at one time by adopting a ceramic liner on the back surface. Welding wall plate circumferential weld: a small automatic submerged arc horizontal welding machine is adopted; the small automatic submerged arc horizontal welding machine adopts a rail positioning mode to carry out welding, the position of the welding machine is limited by the rail during welding, and a welding gun freely swings in a small range to carry out welding; controlling the assembly gap between the upper and lower adjacent arc-shaped wall plates; an automatic beveling machine is adopted to manufacture the bevel, the back of the circumferential weld adopts a ceramic liner, and the single-side welding and the double-side forming are carried out.
Description
Technical Field
The technical scheme belongs to the technical field of chemical engineering construction, and particularly relates to an automatic welding method for small and medium-sized vertical storage tanks.
Background
The quality of the welding of the tank is related to the service life of the tank and the safety and reliability of the whole device during production. At present, the domestic automatic storage tank welding machine has the defects of large volume, inconvenient disassembly and movement, heavy mass, suitability for thick-wall storage tanks and the like, except 20000m35000m of the thick-wall storage tank is beyond the realization of automatic welding3～20000m3The storage tank has thin tank wall, so that the tank wall is easy to deform and quality accidents occur due to the fact that a common automatic storage tank welding machine is used, automatic production is difficult to achieve due to the reasons that the welding quantity is relatively small, the storage tank is inconvenient to move and the like, and therefore manual arc welding is used for welding for many years, the labor intensity of welding operation is high, the welding quality is unstable, and the influence of the operation environment is large.
In the welding process of the storage tank by adopting the traditional method, the defects of welding seam slag inclusion, air holes and the like are caused, and the welding quality is unstable. In order to reduce or eliminate these problems during construction, a great deal of effort and cost is required in the engineering work and the engineering management.
Disclosure of Invention
The existing problems are subjected to technical analysis, and the main reasons are found to be (1) too small welding current and too high welding speed; (2) the angle of the groove of the weldment is small, and the gap between the weldment and the weldment is too small; (3) during welding, the swinging angle of the welding gun is not right, so that the arc deflection is caused. Therefore, the invention is in the range of 5000 to 20000m3In the welding construction of the small and medium-sized vertical storage tank, the single-side welding and double-side forming are realized by using the automatic gas shielded welding technology for the bottom plate of the small and medium-sized vertical storage tank and the automatic submerged arc horizontal welding technology and the gas electric vertical welding technology for the wall plate with the ceramic liner, so that the welding efficiency is greatly improvedThe welding quality reduces the construction cost, and the purpose of ensuring the safety, quality, progress and cost of the project is achieved. The method comprises the following specific steps:
an automatic welding method for a small and medium-sized vertical storage tank is characterized in that the material of a main body of the storage tank is Q345R; the side wall is formed by splicing a plurality of arc-shaped wall plates in a left-right adjacent mode to form an annular shape, and the annular wall plates are spliced in a vertical adjacent mode to form the side wall; the main body of the bottom plate is formed by sequentially and adjacently splicing medium webs, and the periphery of the main body of the bottom plate is spliced with an edge plate;
according to different welding positions, the welding method comprises the following steps:
1) welding of the base plate, wherein:
the middle web of the bottom plate is welded in a lap joint mode or in a butt joint mode, the edge plates are welded in a butt joint mode, and the edge plates and the middle web are welded in a lap joint mode; flat steel is used as a base plate below the butt welding seam of the bottom plate;
the bottom plate is welded with butt weld seams and used for welding adjacent middle webs;
2) the wall plate longitudinal weld seam welding is used for welding left and right adjacent arc-shaped wall plates;
3) the wall plate circular welding seam is used for welding the upper and lower adjacent arc-shaped wall plates;
1) in the welding of the base plate, the welding head,
a-50 multiplied by 5 flat steel is used as a base plate below the butt welding seam of the bottom plate; welding by using a gas shielded welding machine, wherein intermittent welding is arranged from the center to two sides during welding, the length of each section is 400-500 mm, and the sections are uniform; when the edge plates are welded, the outer side gap is controlled to be 3-5 mm, and the inner side gap is controlled to be 6-8 mm;
2) longitudinal weld seam welding of wall plate
A trackless automatic creeping gas-electric vertical welding machine is adopted; the assembly gap between adjacent arc-shaped wall plates is 3-5 mm; an automatic beveling machine is adopted to make a bevel;
processing a longitudinal welding line of the wall plate into a single-side V-shaped groove, and welding and forming the wall plate at one time by adopting a ceramic liner on the back;
3) wall plate circular weld seam welding
A small automatic submerged arc horizontal welding machine is adopted; the small automatic submerged arc horizontal welding machine adopts a rail positioning mode to carry out welding, the position of the welding machine is limited by the rail during welding, and a welding gun freely swings in a small range to carry out welding; the assembly gap between the upper and lower adjacent arc-shaped wall plates is 2-4 mm; an automatic beveling machine is adopted to manufacture a bevel, a ceramic liner is adopted on the back of the circumferential weld, and the single-side welding and the double-side forming are carried out;
the welding process parameter requirements are as follows:
the method adopts a small automatic welding machine to operate according to the main welding structure of the storage tank, and designs a corresponding welding seam form, materials and processes. Eight 10000m of engineering tanks are installed in a certain ethylene project benzene/styrene/EDC tank area3The vertical storage tank is tried in the construction of the small vertical storage tank, and the automatic welding method is adopted, so that the production cost is controlled, the energy consumption of enterprises is reduced, and the use amount and the cost of labor personnel are reduced.
Drawings
FIG. 1 is a schematic view of a butt weld of a base plate;
FIG. 2 is a schematic view of a wall panel longitudinal weld;
FIG. 3 is a schematic view of a circumferential weld of a tank wall;
FIG. 4 is a schematic view of the appearance of a butt weld of a base plate reflecting the quality of the weld;
FIG. 5 is a schematic view of the appearance of a wall plate girth weld reflecting the quality of the weld.
Detailed Description
The following is combined with 8 10000m of benzene/styrene/EDC tank areas of a certain ethylene project3The technical scheme is explained in the embodiment of storage tank construction. In the construction embodiment, the bottom plate of the vertical storage tank adopts an automatic gas shielded welding method, the wall plate adopts an automatic submerged arc transverse welding method and an automatic electrogas vertical welding method, and the purposes of ensuring the safety, quality, progress and cost of a project are achieved.
1. Description of the invention
8 storage tank main part materials are Q345R, and the diameter is 30 meters, and the jar wall height is 16.5 meters, and the tank bottoms is about 20 meters to the height of tank deck center roof peak, wherein:
the two EDC storage tanks consist of 9 circles of wall plates, a bottom plate and a top plate, wherein the wall thickness of the wall plates is 8-22 mm, the wall thickness of a middle breadth plate of the bottom plate is 10mm, the wall thickness of an edge plate of the bottom plate is 16mm, and the wall thickness of the top plate of the bottom plate is 8 mm;
the three benzene storage tanks consist of 9 circles of wall plates, 1 circle of pressure bearing rings, a bottom plate and a top plate, wherein the wall thickness of the wall plates is 8-18 mm, the wall thickness of the pressure bearing rings is 20mm, the wall thickness of a middle breadth plate of the bottom plate is 10mm, the wall thickness of an edge plate of the bottom plate is 14mm, and the wall thickness of the top plate is 6 mm;
the three styrene storage tanks consist of 9 circles of wall plates, 1 circle of pressure bearing rings, a bottom plate and a top plate, wherein the wall thickness of the wall plates is 8-16 mm, the wall thickness of the pressure bearing rings is 20mm, the wall thickness of a middle breadth plate of the bottom plate is 10mm, the wall thickness of an edge plate of the bottom plate is 14mm, and the wall thickness of the top plate is 6 mm;
2. welding method and construction method
The efficiency of improvement welding that can be very big through using automatic welding processing technique and equipment has more great advantage than manual welding, especially under the circumstances that the labour cost is high, uses the help enterprise that automatic welding technique can be fine to control manufacturing cost, reduces the energy resource consumption of enterprise, reduces labour personnel's use amount and cost, improves the core competitiveness of enterprise. Therefore, in the construction process of the storage tank main body, the automatic welding processing technology is formulated by combining the actual situation on site, and the following table 1 is shown:
table 1.
(1) In the welding of the bottom plate, the middle web of the bottom plate is in lap joint welding or butt joint welding, the edge plate is in butt joint welding, and the edge plate and the middle web are in lap joint welding. In the example, the middle web of the bottom plate is butt-welded, and the edge plates are butt-welded. The lap welding method of the edge plate and the middle web plate is implemented according to the existing operation specifications, and the requirements of butt welding are described as follows:
the thickness of an edge plate at the bottom of an EDC storage tank is 16mm, the thickness of an edge plate at the bottom of a benzene and styrene storage tank is 14mm, the thickness of a middle-width plate is 10mm, the EDC storage tank is designed into a butt weld, 50 multiplied by 5 flat steel (the ground flat steel is 50 multiplied by 5, meaning 50 mm wide and 5mm thick) is used as a backing plate below the weld, the welding quantity is large, the deformation quantity is large when the butt weld is welded, when a small gas shielded welding machine is used for welding, intermittent welding is arranged from the center to two sides at a control panel of the welding machine, the length of a segment is controlled to be 400-500 mm, the segment is uniform, when the edge plate is welded, the outer side gap is controlled to be 3-5 mm, the inner side gap is controlled to be 6-8 mm, the automatic gas shielded welding machine selects an automatic submerged arc horizontal welding machine based on a top end motor HCD500-2A, the automatic gas shielded welding machine is adopted, the labor intensity of constructors can be reduced, but also can ensure the smoothness, the beauty and the stability of the welding quality of the welding seam (as shown in figure 4).
The weld seam of the middle web of 10mm thickness in this example is shown in FIG. 1, and the welding process parameters are shown in Table 2 below.
TABLE 2 welding process parameters table
(2) Longitudinal weld seam welding of wall plate
Automatic gas-electric vertical welding is selected for welding vertical seams of the wall plates, a large vertical storage tank can use a large gas-electric vertical welding machine to weld the vertical seams of the wall plates of the storage tank, and the small vertical storage tank cannot use the large gas-electric vertical welding machine from the aspects of economic benefit, construction safety and the like, so that a trackless automatic crawling welding machine is selected.
Because used the automatic welding machine of crawling of trackless, control welder by laser tracking welding seam during welding, therefore control group between the wallboard to the clearance need be accurate, general control is at 3 ~ 5mm, and automatic beveling machine is chooseed for use as far as possible to the groove, can guarantee the level and smooth and the continuity of groove.
When the small vertical storage tank is manually welded, the back side is generally subjected to gouging and back chipping, and then welding is carried out, so that the efficiency is low, and the welding quality cannot be guaranteed, therefore, the vertical welding line of the wall plate is processed into a V-shaped groove with the angle of 60 +/-5 degrees, and the back side is formed by one-step welding by adopting a ceramic liner. The longitudinal welding position of the tank wall panel with the thickness of 12mm in the present example is shown in fig. 2, and the welding process parameters are shown in table 3 below.
Through field operation and record, welding parameters are set on the control panel before welding, welding of 2m long wallboard longitudinal weld joints can be completed only in 15-20 minutes, the weld joints are smooth and attractive in forming, the welding quality is more stable than manual work, the construction period is shortened, and economic benefits are remarkably improved.
TABLE 3 welding process parameters table
(3) Wall plate circular weld seam welding
The welding amount of the circumferential weld of the wall plate is the largest in the welding amount of the storage tank, and a submerged arc transverse welding machine can be selected for welding in a large vertical storage tank to achieve the purposes of saving the construction cost and shortening the construction period. However, manual welding is always used in the small vertical storage tank, and if a large submerged arc horizontal welding machine is used for welding, the purposes of saving construction cost and shortening construction period cannot be achieved, and the workload of constructors is increased and cannot be paid. In the project, a HCD500-2A small-sized automatic submerged arc horizontal welding machine of a top end motor is selected to weld the circumferential weld of the wall plate.
The small-size automatic submerged arc horizontal welder that wallboard circumferential weld used adopts the mode of track location to weld, and the track can use magnetic means to adsorb on the tank wall when welding carbon steel class storage tank, can be with magnetic means replacement for vacuum adsorption device when welding stainless steel class storage tank, and the track is lower to the surface demand of work piece when using, only need magnetic adsorption device department handle smooth level can, the track can carry out about from top to bottom front and back regulation, and application scope is wide.
Because the small-size automatic submerged arc horizontal welding machine of rail mounted has been used, by the track restriction welding machine position during the welding, welder small-amplitude freely swings and welds, therefore the group between the upper and lower wallboard needs the precision to the clearance, and general control is at 2 ~ 4mm, and automatic beveling machine is chooseed for use as far as possible to the groove, can guarantee the level and smooth and the continuity of groove. In addition, the back of the circumferential weld of the wall plate adopts a ceramic liner, and the wall plate is formed by single-side welding and double-side welding, so that the construction cost is effectively saved, the construction period is reduced, the welding quality of the small automatic submerged arc transverse welding machine is good, the appearance is attractive in shape and reliable in quality through on-site actual operation and recording, the ray detection qualified rate can meet the requirements of relevant design and specification, the sheet return rate can be reduced in the actual construction process, and the engineering quality is effectively ensured. The circumferential weld of the 10mm thick tank wall panel of this example is shown in figure 3 and the welding process parameters are given in table 4 below.
TABLE 4 welding process parameters table
3. Technical analysis
(1) The welding efficiency is high: the operation data is charted, the operation is simple, the size is small, the weight is light, the machine assembly, the welding machine debugging, the construction welding and other work can be completed by only one operator, 3-4 small submerged arc transverse welding machines can be operated by one operator in the welding process, the use amount of labor personnel is effectively reduced, and the labor expenditure is reduced.
(2) The cost is controllable: the welding flux and the welding wire used by the welding machine are all conventional products, are convenient to purchase and are high in quality and low in price; and the welding machine modularization, every component all can dismantle the change alone, and cost of maintenance is low, and the maintenance is easy, can effectively reduce purchasing expense.
(3) The adaptability is strong: the wind resistance is strong during the submerged arc automatic welding, so the submerged arc automatic welding machine is suitable for field operation, a wind-proof facility is not required to be specially erected, and the wind-proof module can be carried on the small automatic submerged arc horizontal welding machine under the condition of large wind power, so the installation and the disassembly are simple and easy to operate, and the construction cost is reduced.
(4) The quality is controllable: because the welding instruction of the automatic welding equipment is uniformly controlled by the system, the welding speed and the welding range can be controlled, the relative continuity can be kept, the welding quality level of the processed workpiece can be constant, the automatic adjustment can be carried out if the problem occurs in the processing process, the relative stability is kept, the metal quality of the processed welding line is higher, the performance is stable, and the appearance is relatively beautiful (such as the wall plate circumferential weld of fig. 5); in addition, the automatic welding machine is regulated and controlled through a digital information system, and does not need to keep the same action or adjust by a processing worker, so that the physical consumption of the welding processing worker can be reduced to a great extent, and the working strength is reduced.
The test piece is welded again and the ray detection is carried out, the problems are successfully solved, the welding qualification rate can reach more than 98%, the repair rate is reduced, and the cost is saved.
4. Weld benefit analysis
The welding production efficiency is obviously improved, the economic cost is greatly reduced, and the difference between the thickness delta and the thickness delta of a steel plate welded by 12mm is up to 10 times compared with the traditional manual electric welding, as shown in the following table 2.
The welding quality is also obviously improved, the average nondestructive inspection qualified rate reaches more than 98 percent, the repair rate is reduced, and the construction cost is saved.
Table 2.
5. Conclusion
The mechanical welding technology is an essential important processing technology in modern mechanical processing and production, and practice proves that 8 tanks of an ethylene project, namely benzene/styrene/EDC (ethylene glycol dimethyl ether/styrene/EDC) tank area are 10000m3The small vertical storage tank can be a small gas-electric vertical welder, a small submerged arc automatic welder, or a small CO2The gas shielded welder carries out welding operation, can effectively reduce the consumption of the energy, by a wide margin improvement weldment work efficiency, have than the manual welding great advantage, especially under the circumstances that the labour cost is high, accelerate the engineering progress, improve welding quality, reduce the degree of dependence to welder's personal skill level, and can reduce the harm of traditional manual welding to the staff, also can help the enterprise to control manufacturing cost, reduce the energy resource consumption of enterprise, reduce labour personnel's use amount and cost.
Claims (5)
1. An automatic welding method for a small and medium-sized vertical storage tank is characterized in that the material of a main body of the storage tank is Q345R; the side wall is formed by splicing a plurality of arc-shaped wall plates in a left-right adjacent mode to form an annular shape, and the annular wall plates are spliced in a vertical adjacent mode to form the side wall; the main body of the bottom plate is formed by sequentially and adjacently splicing medium webs, and the periphery of the main body of the bottom plate is spliced with an edge plate;
according to different welding positions, the welding seam form is as follows:
1) welding of the bottom plate: the middle web of the bottom plate is welded in a lap joint mode or in a butt joint mode, the edge plates are welded in a butt joint mode, and the edge plates and the middle web are welded in a lap joint mode;
2) welding longitudinal welding seams of the wall plate: the welding device is used for welding left and right adjacent arc-shaped wall plates;
3) welding wall plate circumferential weld: the welding device is used for welding the upper and lower adjacent arc-shaped wall plates;
it is characterized in that
1) Butt weld welding of bottom plates
A-50 multiplied by 5 flat steel is used as a base plate below the butt welding seam of the bottom plate; welding by using a gas shielded welding machine, wherein intermittent welding is arranged from the center to two sides during welding, the length of each section is 400-500 mm, and the sections are uniform; when the edge plates are welded, the outer side gap is controlled to be 3-5 mm, and the inner side gap is controlled to be 6-8 mm;
2) longitudinal weld seam welding of wall plate
A trackless automatic creeping gas-electric vertical welding machine is adopted; the assembly gap between adjacent arc-shaped wall plates is 3-5 mm; an automatic beveling machine is adopted to make a bevel;
processing a longitudinal welding line of the wall plate into a V-shaped groove, and welding and forming at one time by adopting a ceramic liner on the back;
3) wall plate circular weld seam welding
A small automatic submerged arc horizontal welding machine is adopted; the small automatic submerged arc horizontal welding machine adopts a rail positioning mode to carry out welding, the position of the welding machine is limited by the rail during welding, and a welding gun freely swings in a small range to carry out welding; the assembly gap between the upper and lower adjacent arc-shaped wall plates is 2-4 mm; an automatic beveling machine is adopted to manufacture a bevel, a ceramic liner is adopted on the back of the circumferential weld, and the single-side welding and the double-side forming are carried out;
the welding process parameter requirements are as follows:
2. the all-position automatic welding method for the small-sized storage tank as claimed in claim 1, wherein the thickness of the arc-shaped wall plate in the storage tank is 8-22 mm, the thickness of the middle panel is 10mm, and the thickness of the edge plate is 16 mm.
3. The automatic welding method for the small and medium-sized vertical storage tank as claimed in claim 2, wherein the butt-welded seam structure of the bottom plate is as follows: the bevel angle is 60 degrees, and the pairing gap is 6 mm; the welding process parameter requirements are as follows:
4. the automatic welding method for the small and medium-sized vertical storage tank as claimed in claim 2, wherein the welding structure of the longitudinal weld of the wall plate is as follows: the bevel angle is 60 +/-5 degrees, and the thickness of the truncated edge is 1-2 mm; the welding process parameter requirements are as follows:
5. the automatic welding method for the small and medium-sized vertical storage tank as claimed in claim 2, wherein the wall plate girth weld joint welding structure is as follows: in the adjacent arc-shaped wall plates up and down, the top edge of the lower arc-shaped wall plate is a flat opening, and the top edge of the upper arc-shaped wall plate is a groove, so that a single-side groove is formed; the groove structure is as follows: the bevel angle is 45 degrees, and the thickness of the truncated edge is 1-2 mm; the welding process parameter requirements are as follows:
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| CN115026452A (en) * | 2022-05-27 | 2022-09-09 | 沪东中华造船(集团)有限公司 | Welding method for composite dome sealing plate of liquid cargo hold containment system |
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| CN101890583A (en) * | 2009-11-17 | 2010-11-24 | 陕西化建工程有限责任公司 | Hydraulic jacking automatic welding inverted construction method of large-sized storage tank |
| CN102069307A (en) * | 2010-10-15 | 2011-05-25 | 林德工程（杭州）有限公司 | Method for welding bottom plate of large flat-bottom storage tank |
| CN105834551A (en) * | 2016-05-20 | 2016-08-10 | 中冶天工集团天津有限公司 | Welding method for large cylinder type steel storage tank bottom plate |
| CN109014507A (en) * | 2018-09-29 | 2018-12-18 | 南京奥特电气股份有限公司 | A kind of solid welding wire gas guarantor vertical-up welding method |
| CN111331227A (en) * | 2019-11-27 | 2020-06-26 | 西安石油大学 | 50000m3Flip-chip method of CO from the following storage tank2Automatic welding process and device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115026452A (en) * | 2022-05-27 | 2022-09-09 | 沪东中华造船(集团)有限公司 | Welding method for composite dome sealing plate of liquid cargo hold containment system |
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