CN103624488A - Technology for manufacturing pile leg of self-elevating offshore wind power work platform - Google Patents

Technology for manufacturing pile leg of self-elevating offshore wind power work platform Download PDF

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Publication number
CN103624488A
CN103624488A CN201310568815.5A CN201310568815A CN103624488A CN 103624488 A CN103624488 A CN 103624488A CN 201310568815 A CN201310568815 A CN 201310568815A CN 103624488 A CN103624488 A CN 103624488A
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welding
plate
groove
pin hole
cladding plate
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CN201310568815.5A
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Chinese (zh)
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CN103624488B (en
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孙涛
孙银华
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南通润邦重机有限公司
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23POTHER WORKING OF METAL; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2250/00Production methods
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00Materials
    • E02D2300/0026Metals
    • E02D2300/0029Steel; Iron
    • E02D2300/0032Steel; Iron in sheet form, i.e. bent or deformed plate-material
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/24Prefabricated piles
    • E02D5/28Prefabricated piles made of steel or other metals

Abstract

The invention discloses a technology for manufacturing a pile leg of a self-elevating offshore wind power work platform. The technology comprises the following steps of rolled steel blanking and prefabricating, group structure prefabricating, single pipe joint manufacturing, manufacturing of all subsections of the leg, covering plate assembling, bolt hole scribing, bolt hole cutting, covering plate secondary assembling and welding, and internal seawater prevention cover assembling and welding. According to the technology, the manufacturing technology of subsection manufacturing and overall folding ultimately is adopted in the pile leg, the manufacturing precision of all the subsections is controlled, and the manufacturing accuracy of the whole pile leg is guaranteed.

Description

A kind of self-lifting offshore wind power job platform spud leg manufacturing process

Technical field

The present invention relates to a kind of self-lifting offshore wind power job platform spud leg manufacturing process.

Background technology

Self-lifting offshore wind power job platform, its major function, for to have in enough bearing capacity situations on sea bed basis, more than the offshore wind farm job platform main body emersion water surface, avoids current, wave to platform direct effect, has influence on the operation of platform.After installation exercise completes, utilize elevating mechanism that platform is down to sea, and four spud legs are risen, make platform in floating state, to move boat to next station, carry out windmill installation exercise; In this hydraulic lifting system, the manufacture of spud leg is most important.Because its accuracy of manufacture requirement is high, difficulty is large, therefore spud leg manufacturing process has been proposed to very high requirement.The spud leg manufacturing process flow generally adopting is at present loaded down with trivial details, complicated; Auxiliary material are many, and cost is large; Mechanical automation degree is low, and labor strength is large; Spud leg linearity, circularity are poor; Laterally, the longitudinal shortcoming such as pin hole bigger error.

Summary of the invention

The object of the invention is in order to overcome above deficiency, a kind of reasonable, efficient, safe and reliable self-lifting offshore wind power job platform spud leg manufacturing process is provided.

Object of the present invention is achieved through the following technical solutions: a kind of self-lifting offshore wind power job platform spud leg manufacturing process, comprises the following steps:

A, steel blanking, prefabricated first: steel plate first to be cut hangs centering on Cutting platform, sets level, and compress prevent mobile; Process each member groove, note groove direction, mechanical means processing is used in the processing of bevel for welding, transition zone as far as possible, spud leg tube coupling adopts NC Flame Cutting blanking with steel plate, adopt semi-automatic flame shape cutting bevel, other section bars can adopt Manual flame cutting to carry out blanking and groove preparation, spud leg cylindrical shell volume round plate width groove cuts off surplus and opens after forcing press presses two, before bevel, to first pull line, prevent out partially, 0~2mm root is stayed in centre, before steel plate length direction groove volume circle, after blanking, opens; After steel blanking, the sheet material of different stage is used the paint of different colours to carry out writing of various signs, prevents that material is with mixed; Roll thickness, size, diagonal, the flatness of front check steel plate, draw mark line, strike sample dotting punch; Roll front first with hydraulic press veneer reeling machine volume press less than plate end regions according to tube coupling radius, press arc, output groove; Before tube coupling rolls, will make and detect model (inside and outside pattern), model length at least should be greater than 1/3 circumference; Tube coupling carry out roller system after accurate positioning on roller bed; Pressure head and roller bowlder machined surface and model gap requirement≤2.0mm; The steel plate of end press-bending radian is delivered to veneer reeling machine and is carried out tube coupling and roll, and the docking dislocation of plate is controlled in 2mm, and plate seam two ends use the steel plate of same material stack pile to fix as run-on tab, and mid portion is (1/3 groove side) tack welding in outside;

B, group structure are prefabricated: the first jigsaw of 16mm flanged plate of ring muscle, and the then inner 26*300 stiffening ring of welding equipment, and the small gusset of 16mm, Φ 3200 ± 2mm while requiring the external diameter 48mm wall thickness of terminal ring muscle, Φ 3210 ± 2mm during 42mm wall thickness, is up to the standards;

C, single tube restraining are made: roll the tube coupling of end through welding after the assay was approved, tube coupling rolls longitudinal joint docking and adopts Lincoln weld; Before welding, install run-on tab, and carefully check groove linearity, flatness, bevel angle and cleannes, require single tube coupling linearity to be less than 2mm, flatness is less than 2mm, for V or X-type groove, require the rear angle of combination to be greater than 50 °, the smooth metal luster of the inner smooth surface of groove, adopts SAW automatic welding after passed examination, one side is carried out back gouging after having welded, and after back chipping, carefully SAW automatic welding is carried out in polishing again; Tube coupling cylindrical shell piece, preheat temperature 80-100 ° of C; After UT detection is qualified, Hui Yuan, diameter tolerance ± 2mm;

D, each segmentation of spud leg are manufactured: every pile leg divides 3 segmentations, is respectively LEG1, LEG2, LEG3; Each segmentation is comprised of 3~4 subsections again, totally 11 subsections; Each subsection is comprised of 2 tube couplings, and two tube couplings are respectively after the assay was approved in turning rolls docking, and tube coupling joint is used the horse plate of stack pile ad eundem to connect, and position while welding stayed welding hole; After welding, needing uses thermal insulation material controls weld seam cool time well; Postwelding should be checked the whole circularity of subsection: diameter tolerance ± 2mm; Postwelding 48 hours, butt welded seam carries out 100%UT, reaches CB/T3559-1994 I grade standard; 50%MT reaches CB/T3958-2004 I grade standard; And spot-check 10%-20% and carry out X ray and detect and to reach CB/T3558-1994 II grade standard;

E, cladding plate assembling: the independent machined of cladding plate, with reference to corresponding process for machining, after machined finishes, prepare groove, line assembling pin hole cladding plate is also carried out mark, from bottom, first block of cladding plate starts assembling, by the assembling of line size, assembly test requires pin hole longitudinal pitch tolerance+1mm, 10 hole cumulative errors 5mm, horizontal spacing tolerance+1.5mm, in four latch controls of same level position, lower deviation is not more than 1mm, the spud leg center of circle is aimed at pin hole center, left and right should be orthogonal with the center line of front and back, along cladding plate pin hole, on cylindrical shell, rule, cleaning eye inner barrel surface, along cladding plate pin hole profile, on cylindrical shell, rule, attention is rule must be perpendicular to drum surface, lay down pin hole cladding plate, on the cladding plate assembling, carry out mark, requirement is the position of every block of cladding plate clearly, termination towards, lay down pin hole cladding plate, and put neat, by group, put, pin hole on shape cutting cylindrical shell, after cutting first pin hole, check size to reach after requirement, can continue cutting, cladding plate close up seam each 100mm of left and right rule and cut, and spot welding is nearby on cylindrical shell, welding equipment when scene closes up,

F, the assembling of cladding plate secondary, welding: after cladding plate being assembled on spud leg successively by ready-made flag sequence, again weld after the assay was approved, postwelding polishing pin hole is inner, the inner anti-seawater cover assembling of spud leg, welding postwelding polish smooth.

The present invention compared with prior art has the following advantages: have the advantages such as workable, operating efficiency is high, the accuracy of manufacture is high, labour intensity is less, reasonable, efficient, safe, reliable.

the specific embodiment:

In order to deepen the understanding of the present invention, below in conjunction with embodiment, the invention will be further described, and this embodiment only, for explaining the present invention, does not form limiting the scope of the present invention.

A kind of embodiment of a kind of self-lifting offshore wind power job platform of the present invention spud leg manufacturing process: comprise the following steps:

A, steel blanking, prefabricated first: steel plate first to be cut hangs centering on Cutting platform, sets level, and compress prevent mobile; Process each member groove, note groove direction, mechanical means processing is used in the processing of bevel for welding, transition zone as far as possible, spud leg tube coupling adopts NC Flame Cutting blanking with steel plate, adopt semi-automatic flame shape cutting bevel, other section bars can adopt Manual flame cutting to carry out blanking and groove preparation, spud leg cylindrical shell volume round plate width groove cuts off surplus and opens after forcing press presses two, before bevel, to first pull line, prevent out partially, 0~2mm root is stayed in centre, before steel plate length direction groove volume circle, after blanking, opens; After steel blanking, the sheet material of different stage is used the paint of different colours to carry out writing of various signs, prevents that material is with mixed; Roll thickness, size, diagonal, the flatness of front check steel plate, draw mark line, strike sample dotting punch; Roll front first with hydraulic press veneer reeling machine volume press less than plate end regions according to tube coupling radius, press arc, output groove; Before tube coupling rolls, will make and detect model (inside and outside pattern), model length at least should be greater than 1/3 circumference; Tube coupling carry out roller system after accurate positioning on roller bed; Pressure head and roller bowlder machined surface and model gap requirement≤2.0mm; The steel plate of end press-bending radian is delivered to veneer reeling machine and is carried out tube coupling and roll, and the docking dislocation of plate is controlled in 2mm, and plate seam two ends use the steel plate of same material stack pile to fix as run-on tab, and mid portion is (1/3 groove side) tack welding in outside;

B, group structure are prefabricated: the first jigsaw of 16mm flanged plate of ring muscle, and the then inner 26*300 stiffening ring of welding equipment, and the small gusset of 16mm, Φ 3200 ± 2mm while requiring the external diameter 48mm wall thickness of terminal ring muscle, Φ 3210 ± 2mm during 42mm wall thickness, is up to the standards;

C, single tube restraining are made: roll the tube coupling of end through welding after the assay was approved, tube coupling rolls longitudinal joint docking and adopts Lincoln weld; Before welding, install run-on tab, and carefully check groove linearity, flatness, bevel angle and cleannes, require single tube coupling linearity to be less than 2mm, flatness is less than 2mm, for V or X-type groove, require the rear angle of combination to be greater than 50 °, the smooth metal luster of the inner smooth surface of groove, adopts SAW automatic welding after passed examination, one side is carried out back gouging after having welded, and after back chipping, carefully SAW automatic welding is carried out in polishing again; Tube coupling cylindrical shell piece, preheat temperature 80-100 ° of C; After UT detection is qualified, Hui Yuan, diameter tolerance ± 2mm;

D, each segmentation of spud leg are manufactured: every pile leg divides 3 segmentations, is respectively LEG1, LEG2, LEG3; Each segmentation is comprised of 3~4 subsections again, totally 11 subsections; Each subsection is comprised of 2 tube couplings, and two tube couplings are respectively after the assay was approved in turning rolls docking, and tube coupling joint is used the horse plate of stack pile ad eundem to connect, and position while welding stayed welding hole; After welding, needing uses thermal insulation material controls weld seam cool time well; Postwelding should be checked the whole circularity of subsection: diameter tolerance ± 2mm; Postwelding 48 hours, butt welded seam carries out 100%UT, reaches CB/T3559-1994 I grade standard; 50%MT reaches CB/T3958-2004 I grade standard; And spot-check 10%-20% and carry out X ray and detect and to reach CB/T3558-1994 II grade standard;

E, cladding plate assembling: the independent machined of cladding plate, with reference to corresponding process for machining, after machined finishes, prepare groove, line assembling pin hole cladding plate is also carried out mark, from bottom, first block of cladding plate starts assembling, by the assembling of line size, assembly test requires pin hole longitudinal pitch tolerance+1mm, 10 hole cumulative errors 5mm, horizontal spacing tolerance+1.5mm, in four latch controls of same level position, lower deviation is not more than 1mm, the spud leg center of circle is aimed at pin hole center, left and right should be orthogonal with the center line of front and back, along cladding plate pin hole, on cylindrical shell, rule, cleaning eye inner barrel surface, along cladding plate pin hole profile, on cylindrical shell, rule, attention is rule must be perpendicular to drum surface, lay down pin hole cladding plate, on the cladding plate assembling, carry out mark, requirement is the position of every block of cladding plate clearly, termination towards, lay down pin hole cladding plate, and put neat, by group, put, pin hole on shape cutting cylindrical shell, after cutting first pin hole, check size to reach after requirement, can continue cutting, cladding plate close up seam each 100mm of left and right rule and cut, and spot welding is nearby on cylindrical shell, welding equipment when scene closes up,

F, the assembling of cladding plate secondary, welding: after cladding plate being assembled on spud leg successively by ready-made flag sequence, again weld after the assay was approved, postwelding polishing pin hole is inner, the inner anti-seawater cover assembling of spud leg, welding postwelding polish smooth.

The present invention has the advantages such as workable, operating efficiency is high, the accuracy of manufacture is high, labour intensity is less by optimal design.

Claims (1)

1. a self-lifting offshore wind power job platform spud leg manufacturing process, is characterized in that: comprise the following steps:
A, steel blanking, prefabricated first: steel plate first to be cut hangs centering on Cutting platform, sets level, and compress prevent mobile; Process each member groove, note groove direction, mechanical means processing is used in the processing of bevel for welding, transition zone as far as possible, spud leg tube coupling adopts NC Flame Cutting blanking with steel plate, adopt semi-automatic flame shape cutting bevel, other section bars can adopt Manual flame cutting to carry out blanking and groove preparation, spud leg cylindrical shell volume round plate width groove cuts off surplus and opens after forcing press presses two, before bevel, to first pull line, prevent out partially, 0~2mm root is stayed in centre, before steel plate length direction groove volume circle, after blanking, opens; After steel blanking, the sheet material of different stage is used the paint of different colours to carry out writing of various signs, prevents that material is with mixed; Roll thickness, size, diagonal, the flatness of front check steel plate, draw mark line, strike sample dotting punch; Roll front first with hydraulic press veneer reeling machine volume press less than plate end regions according to tube coupling radius, press arc, output groove; Before tube coupling rolls, will make and detect model (inside and outside pattern), model length at least should be greater than 1/3 circumference; Tube coupling carry out roller system after accurate positioning on roller bed; Pressure head and roller bowlder machined surface and model gap requirement≤2.0mm; The steel plate of end press-bending radian is delivered to veneer reeling machine and is carried out tube coupling and roll, and the docking dislocation of plate is controlled in 2mm, and plate seam two ends use the steel plate of same material stack pile to fix as run-on tab, and mid portion is (1/3 groove side) tack welding in outside;
B, group structure are prefabricated: the first jigsaw of 16mm flanged plate of ring muscle, and the then inner 26*300 stiffening ring of welding equipment, and the small gusset of 16mm, Φ 3200 ± 2mm while requiring the external diameter 48mm wall thickness of terminal ring muscle, Φ 3210 ± 2mm during 42mm wall thickness, is up to the standards;
C, single tube restraining are made: roll the tube coupling of end through welding after the assay was approved, tube coupling rolls longitudinal joint docking and adopts Lincoln weld; Before welding, install run-on tab, and carefully check groove linearity, flatness, bevel angle and cleannes, require single tube coupling linearity to be less than 2mm, flatness is less than 2mm, for V or X-type groove, require the rear angle of combination to be greater than 50 °, the smooth metal luster of the inner smooth surface of groove, adopts SAW automatic welding after passed examination, one side is carried out back gouging after having welded, and after back chipping, carefully SAW automatic welding is carried out in polishing again; Tube coupling cylindrical shell piece, preheat temperature 80-100 ° of C; After UT detection is qualified, Hui Yuan, diameter tolerance ± 2mm;
D, each segmentation of spud leg are manufactured: every pile leg divides 3 segmentations, is respectively LEG1, LEG2, LEG3; Each segmentation is comprised of 3~4 subsections again, totally 11 subsections; Each subsection is comprised of 2 tube couplings, and two tube couplings are respectively after the assay was approved in turning rolls docking, and tube coupling joint is used the horse plate of stack pile ad eundem to connect, and position while welding stayed welding hole; After welding, needing uses thermal insulation material controls weld seam cool time well; Postwelding should be checked the whole circularity of subsection: diameter tolerance ± 2mm; Postwelding 48 hours, butt welded seam carries out 100%UT, reaches CB/T3559-1994 I grade standard; 50%MT reaches CB/T3958-2004 I grade standard; And spot-check 10%-20% and carry out X ray and detect and to reach CB/T3558-1994 II grade standard;
E, cladding plate assembling: the independent machined of cladding plate, with reference to corresponding process for machining, after machined finishes, prepare groove, line assembling pin hole cladding plate is also carried out mark, from bottom, first block of cladding plate starts assembling, by the assembling of line size, assembly test requires pin hole longitudinal pitch tolerance+1mm, 10 hole cumulative errors 5mm, horizontal spacing tolerance+1.5mm, in four latch controls of same level position, lower deviation is not more than 1mm, the spud leg center of circle is aimed at pin hole center, left and right should be orthogonal with the center line of front and back, along cladding plate pin hole, on cylindrical shell, rule, cleaning eye inner barrel surface, along cladding plate pin hole profile, on cylindrical shell, rule, attention is rule must be perpendicular to drum surface, lay down pin hole cladding plate, on the cladding plate assembling, carry out mark, requirement is the position of every block of cladding plate clearly, termination towards, lay down pin hole cladding plate, and put neat, by group, put, pin hole on shape cutting cylindrical shell, after cutting first pin hole, check size to reach after requirement, can continue cutting, cladding plate close up seam each 100mm of left and right rule and cut, and spot welding is nearby on cylindrical shell, welding equipment when scene closes up,
F, the assembling of cladding plate secondary, welding: after cladding plate being assembled on spud leg successively by ready-made flag sequence, again weld after the assay was approved, postwelding polishing pin hole is inner, the inner anti-seawater cover assembling of spud leg, welding postwelding polish smooth.
CN201310568815.5A 2013-11-15 2013-11-15 A kind of self-lifting offshore wind power job platform spud leg manufacturing process CN103624488B (en)

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Cited By (13)

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CN104384733A (en) * 2014-10-23 2015-03-04 武汉船用机械有限责任公司 Welding deformation control process used for manufacturing plug type hoisting platform pile leg
CN104590505A (en) * 2014-12-03 2015-05-06 中船黄埔文冲船舶有限公司 Construction precision control method for cylinder pin hole type leg
CN104889682A (en) * 2015-05-25 2015-09-09 南通中远船务工程有限公司 Pile leg segmented construction method
CN105414907A (en) * 2016-01-11 2016-03-23 南通振华重型装备制造有限公司 Building technology for pile leg of self-elevating wind power vessel
CN106475741A (en) * 2016-10-20 2017-03-08 南通振华重型装备制造有限公司 A kind of self-elevating drilling platform cantilever beam pushing-pulling-rack building technology
CN106812126A (en) * 2017-01-13 2017-06-09 广东精铟海洋工程股份有限公司 A kind of high-precision offshore platform spud leg assemble method and its spud leg being assembled into
CN107470860A (en) * 2017-07-17 2017-12-15 南通蓝岛海洋工程有限公司 A kind of building technology of offshore boosting station lower component
CN107825077A (en) * 2017-11-16 2018-03-23 南通蓝岛海洋工程有限公司 It is a kind of to rise self-propulsion type platform leg building technology certainly
CN107825069A (en) * 2017-07-21 2018-03-23 南通振华重型装备制造有限公司 A kind of interior center support system manufacture craft
CN108385643A (en) * 2018-03-16 2018-08-10 上海船舶研究设计院(中国船舶工业集团公司第六0四研究院) A kind of lifting platform hydraulic bolt formula spud leg
CN108817607A (en) * 2018-07-10 2018-11-16 湖南机电职业技术学院 Wind-power electricity generation stake welding procedure
CN109604980A (en) * 2018-11-08 2019-04-12 武汉船用机械有限责任公司 A kind of manufacturing method of long cylindrical mould structural member
CN109648269A (en) * 2019-01-02 2019-04-19 南通蓝岛海洋工程有限公司 A kind of promotion leg stake building technology of marine life platform

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CN102717168A (en) * 2012-07-04 2012-10-10 上海振华重工集团(南通)传动机械有限公司 Technology for manufacturing chord tube for ocean platform pile leg main coil
CN102806428A (en) * 2012-09-04 2012-12-05 南通润邦重机有限公司 Integral manufacturing method for container spreader
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CN103157954A (en) * 2011-12-09 2013-06-19 韶关市中机重工锻压有限公司 Forging suppressing manufacturing technique of semi-circle plate for oil drilling platform spud legs
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CN102806428A (en) * 2012-09-04 2012-12-05 南通润邦重机有限公司 Integral manufacturing method for container spreader

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104384733A (en) * 2014-10-23 2015-03-04 武汉船用机械有限责任公司 Welding deformation control process used for manufacturing plug type hoisting platform pile leg
CN104590505A (en) * 2014-12-03 2015-05-06 中船黄埔文冲船舶有限公司 Construction precision control method for cylinder pin hole type leg
CN104889682B (en) * 2015-05-25 2017-09-01 南通中远船务工程有限公司 A kind of spud leg sectional construction method
CN104889682A (en) * 2015-05-25 2015-09-09 南通中远船务工程有限公司 Pile leg segmented construction method
CN105414907A (en) * 2016-01-11 2016-03-23 南通振华重型装备制造有限公司 Building technology for pile leg of self-elevating wind power vessel
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CN106812126A (en) * 2017-01-13 2017-06-09 广东精铟海洋工程股份有限公司 A kind of high-precision offshore platform spud leg assemble method and its spud leg being assembled into
CN107470860A (en) * 2017-07-17 2017-12-15 南通蓝岛海洋工程有限公司 A kind of building technology of offshore boosting station lower component
CN107470860B (en) * 2017-07-17 2019-05-21 南通蓝岛海洋工程有限公司 A kind of building technology of offshore boosting station lower component
WO2019015260A1 (en) * 2017-07-17 2019-01-24 南通蓝岛海洋工程有限公司 Construction process of lower assembly of offshore voltage booster substation
CN107825069A (en) * 2017-07-21 2018-03-23 南通振华重型装备制造有限公司 A kind of interior center support system manufacture craft
CN107825077A (en) * 2017-11-16 2018-03-23 南通蓝岛海洋工程有限公司 It is a kind of to rise self-propulsion type platform leg building technology certainly
CN107825077B (en) * 2017-11-16 2019-07-19 南通蓝岛海洋工程有限公司 It is a kind of to rise self-propulsion type platform leg building technology certainly
CN108385643A (en) * 2018-03-16 2018-08-10 上海船舶研究设计院(中国船舶工业集团公司第六0四研究院) A kind of lifting platform hydraulic bolt formula spud leg
CN108817607A (en) * 2018-07-10 2018-11-16 湖南机电职业技术学院 Wind-power electricity generation stake welding procedure
CN109604980A (en) * 2018-11-08 2019-04-12 武汉船用机械有限责任公司 A kind of manufacturing method of long cylindrical mould structural member
CN109648269A (en) * 2019-01-02 2019-04-19 南通蓝岛海洋工程有限公司 A kind of promotion leg stake building technology of marine life platform

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