CN100333966C - Construction method of single point mooring float den - Google Patents
Construction method of single point mooring float den Download PDFInfo
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- CN100333966C CN100333966C CNB200410016781XA CN200410016781A CN100333966C CN 100333966 C CN100333966 C CN 100333966C CN B200410016781X A CNB200410016781X A CN B200410016781XA CN 200410016781 A CN200410016781 A CN 200410016781A CN 100333966 C CN100333966 C CN 100333966C
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Abstract
The present invention discloses a construction method of single point mooring floater dens. The present invention comprises the following steps that 1, middle conical bodies are constructed; 2, floater dens are assembled and welded. The present is characterized in that in the process of constructing the middle conical body, twelve equant conical boards are connected with the conical center to carry out height positioning and to be welded by adopting a symmetrical type, and multilayer and multiple pass welding is carried out from bottom to top; in the process of assembling and welding the floater dens, the front of ship bodies is segmented and positioned, and a circle center is determined at first, then the center is determined and the height is marked to be used as measuring baselines. Though the method, the welding deformation is controlled, and the match accuracy of floaters and the floater dens are guaranteed.
Description
Technical field
The present invention relates to the marine technology field, relate in particular to construction method of single-point float socket.
Background technology
FPSO is the Floating Production oil storage tanker at a double-deck side structure in single end of southern China sea marine site operation, single point mooring (SPM) is arranged in stem, it is unique connecting device of oil storage tanker and offshore oil production system, submarine oil, be connected with float with defeated oil flexible pipe by defeated oil hard tube, float is generally fixed by nine seabed anchorings, regulates the degree of depth in the water by the air floating drum.When oil storage tanker is dragged to the float top, put down cable wire and cargo hook gear, float is drawn in the float cave adopt hydraulic locking apparatus to be fixed.Realize oil storage tanker under any circumstance can both be effectively, be connected with oil production equipment easily.
The float cave is connected and forms with Outer Bottom Plating, 800mm platform, 8000mm platform and ￠ 12000mm cylindrical drum by last ring, intermediate cone, following ring, big bracket etc.The float acupuncture point belongs to the strength member district in the segmentation of hull stem, the upper and lower ring body in float and float cave is by the import of NARWAY APL company, and the float cave is made by our company and installed.And the shipowner requires float and float cave tolerance fit, must be controlled at following accuracy rating:
(a) go up ring diameter ￠ 3520
0 + 5Mm
(b) ring diameter ￠ 9000 under
0 + 5Mm
(c) up and down the ring between the height 7560
0 + 5Mm
(d) go up the ring internal diameter center of circle and eccentric between the ring center of circle down less than 1.5mm
(e) go up ring levelness 0
+ 1Mm (f) is ring levelness 0 down
+ 1Mm
To cause the float can not be if surpass tolerance in float cave serious consequence in place.
For a long time, in marine technology, the construction of steel systeming equipment all is by blanking, assembling, welding, carries out machinework etc. then and finishes in proper order.Common construction method of single-point float socket has following defective:
1, counter the making of segmentation is formed in bottom segmentation and single-point float cave, stands up when advancing dock again, relocates, and the precision in float cave is wayward.
2, float cave cone is formed by four layers, forms a circumference by three for every layer, has increased by three circumferential welded seams.Increasing of quantity of welding makes control highly more difficult.
3, with the cone be line of centers, outwards in layer install, must cause that cone diameter amount of contraction is big by the center.
Summary of the invention
The objective of the invention is to overcome the defective of prior art, a kind of later-model construction method of single-point float socket is provided.
The invention provides construction method of single-point float socket, may further comprise the steps: the construction of (1) intermediate cone; (2) assembling in float cave and welding; Its characteristics are: in the construction of intermediate cone, with 12 blocks of circular cone plates of five equilibrium, press the center of circular cone and location highly, adopt the symmetrical expression welding, the per pass weld seam carries out multi-pass welding from bottom to top and connects; In the assembling in float cave and welding, earlier with the split fix of hull stem, centring, the absolute altitude that centers then, and with this as the gauge reference target line.
Wherein the assembling in float cave is carried out according to the following steps with welding:
(1) hull stem split fix;
(2) accurately rule and cut Outer Bottom Plating;
(3) lifting encircles down;
(4) dress stiffener;
(5) ring welds with the outside plate circumferential welded seam down;
(6) dress weldering 800mm platform;
(7) lifting intermediate cone;
(8) big bracket is installed;
(9) adorn the ring of burn-oning;
(10) lifting 8000mm landing slab.
In (2) step, draw circle on the plate alow, cut surplus and beveling of the edge on request then according to following ring diameter.
In (3) step, 0 ° of necessary centering adjustment line head of following ring, by supported at three point, levelness suitable for reading is less than 1mm, and the platform center of circle, the center of circle is aimed in the following ring center of circle, and deviation is less than 1mm.
In (5) step, at first descend the welding of ring and Outer Bottom Plating, 80 ℃～100 ℃ of weld preheatings are symmetrically welded, and adopt multilayer welding, and each layer welded joint staggers.
In (6) step, during lifting 800mm platform, stiffener will be located by line on the Φ 12000mm barrel, and makes levelness less than 2mm, carries out the welding of landing slab and following ring, landing slab and Φ 12000mm barrel then.
In (7) step, the center of circle, location and height, the center of circle suitable for reading and end opening circle center error are less than 1.5mm.
In (8) step, 12 big bracket the latter halfs are installed, and fix with intermediate cone, the spot welding of Φ 12000mm cylinder wallboard respectively.
In (9) step, during last loop mapping, level suitable for reading is not more than 1.5mm, ring highly stays the 8mm amount of contraction up and down, encircle centre deviation up and down less than 1.5mm, should dock earlier during welding, promptly descend ring and intermediate cone earlier, the welded corner joint of big bracket and intermediate cone, big bracket and cylinder wallboard is carried out in the welding of intermediate cone and last ring then.
In (10) step, four arcs of lifting 8000mm landing slab, make 0 ° of landing slab, 90 °, 180 °, 270 ° aligning 12000mm cylinder relevant positions, when big bracket the first half is installed, the latter half is aimed on 12 big brackets, draws internal orifice radial slack line, and the weld seam between platen and the last ring and the weld seam of landing slab and cylinder wallboard are decided in the assembling solid welding, carry out the welding of landing slab jigsaw from inside to outside, landing slab and last ring carry out CO then
2The single face welding with backing.
Positive progressive effect of the present invention is:
1, the bottom segmentation separates construction with float cave intermediate cone, and then assembles.
2, segmentation normal state in bottom is built, and float cave cone also normal state is built, and stands up, guarantees accuracy of positioning so reduce.
3, the off the beaten track transverse row plate of float cave intermediate cone adopts in line version mode to build, and has cancelled circumferential welded seam, has controlled and has encircled circularity up and down, has guaranteed up and down levelness, the precision of bore, has reduced height.
4, hull stem segmentation location, centring earlier, the absolute altitude that centers is with this gauge reference target line as segmentation, single-point float cave.
5, bow segmentation completion is earlier progressively installed following ring, intermediate cone, big bracket in the float cave then, is gone up ring, because big floor is subjected to the uniform pulling force of all directions, has guaranteed the float cave and the assembly precision of ring up and down in welding process.
6, reverse construction does not have stock left for machining.
The specific embodiment
The construction program in single-point float of the present invention cave is divided into three phases, at first carry out the prefabricated of intermediate cone, weld with upper and lower ring dress respectively then, because the float cave is to be contained in the hull bow segmentation (FE01), and FE01 is the normal state construction, the float cave is progressively forward assembling from bottom to top then, stands up so reduce, and guarantees accuracy of positioning.
Because welding is the major cause that influences structure precision, thus assembling and welding job implementation phaseization, distortion, precision phase in control, thus reach the size overall control, therefore, must take all factors into consideration the welding in whole float cave.
(1) on welding method:, selected the little CO2 gas shield welding of heat input in order to reduce welding deformation.
(2) on welding material: selected day Benshen's steel DW-100 high efficiency orbital arc welding silk (￠ 1.2) for use, this welding wire compare with homemade flux-cored wire have that electric arc is softly stablized, splashed less, welding bead outward appearance and shape be good, good welding technological properties such as detachability is good, powder amount is few.
(3) on welding process, a series of measures have been taked.
Concrete method of construction is as follows:
1.1 the construction of intermediate cone:
Intermediate cone cooperates with 12 big floors for convenience, reduce the four-bladed vane seam, the control welding contraction distortion, intermediate cone employings etc. divide 12 in line plate seams to form, in line plate longitudinal length all places the 8mm surplus, and leave surplus 84mm at circumferencial direction, treat other plate seam welding after, last piece plate is pressed accurate dimension line cutting.In order to guarantee accurately to measure and the control welding deformation, adopt vertical groined type overhead in by moulding bed, 12 blocks of circular cone plates press the center of circular cone and are highly located.The symmetrical expression welding is adopted in 120 ℃ of intermediate cone weld preheatings, carries out multi-pass welding from bottom to top and connects, and before the 12nd plate welding, the diameter of measuring upper and lower mouthful does not once more enclose length to interlayer temperature in 100 ℃ at the end.Cut surplus then, last twice weld seam welds simultaneously.Intact back to be welded upper and lower opening is corrected.
1.2 the assembling in float cave and welding:
In order to guarantee the accuracy of manufacture in float cave, at first with hull stem segmentation (FE01) location, centring, the absolute altitude that centers then, and with this gauge reference target line as the float cave.Welding divides three phases to finish.
Be F/s promptly from Outer Bottom Plating to the 800mm landing slab
Is subordinate phase from the 800mm landing slab to big floor the latter half
From big floor the latter half to the 8000mm landing slab is the phase III
1.2.1FE01 split fix
At first carrying out platform line, is that φ 10160 circles, and 48 five equilibriums are drawn in the center of circle with the intersection point of hull #265 rib bit line and center line of boat, founds center of circle chain-wales then, with laser transit chain-wales is refuted in the center of circle.Put 18 stupefied wood, then with the FE01 split fix, this is the construction benchmark, so split fix is particularly important.
1.2.2 cutting Outer Bottom Plating surplus
Draw circle on the plate alow according to following ring diameter (actual measurement φ 10149+12mm), cut surplus then and by the welding requirements beveling of the edge.
1.2.3 lifting is ring down
Encircle 0 ° of (fixed during machinework) centering adjustment line head down; By supported at three point, make levelness＜1mm suitable for reading, the platform center of circle, the center of circle, deviation＜1mm are aimed in the following ring center of circle.
1.2.4 dress stiffener
By matching requirements, gap＜1.5mm
1.2.5 following ring and the welding of outside plate circumferential welded seam
At first descend the welding of ring and Outer Bottom Plating, preheating is 80 ℃～100 ℃ before the welding, six welder's symmetries are welded, and multilayer welding is adopted in welding, and each layer welded joint staggers, for preventing in welding process, to produce ovalizing deflection, the intact one deck of every weldering all will be measured, and is offset with the monitoring center of circle, and in time corrects center of circle skew with the method that changes sequence of welding, during dress weldering stiffener, the same employing is symmetrically welded.
1.2.6 dress weldering 800mm platform
During lifting 800mm platform, stiffener will be located by line on the φ 12000mm barrel, and makes levelness≤2mm, carry out the welding of landing slab and following ring, landing slab and φ 12000mm barrel then, observe weldering butt seam earlier during welding, weld fillet welding in the vertical position again, back weldering flush fillet weld.
1.2.7 dress weldering intermediate cone
The center of circle, location and height highly are 6264+8mm, and wherein 8mm is the electric welding allowance for shrinkage, the center of circle suitable for reading and end opening circle center error≤1.5mm (the upper and lower mouthful of center of circle can be measured with plumb bob).
1.2.8 big bracket is installed
12 big bracket the latter halfs (big bracket the first half is brought the 8000mm platform into) are installed, 12 big bracket the latter halfs are fixed with intermediate cone, the spot welding of φ 12000mm cylinder wallboard respectively.
The ring 1.2.9 dress is burn-on
During last loop mapping, level≤1.5mm suitable for reading, ring highly stays the 8mm amount of contraction up and down, encircle centre deviation＜1.5mm up and down, should dock earlier during welding, promptly descend ring and intermediate cone earlier, the welded corner joint of big bracket and intermediate cone, big bracket and cylinder wallboard is carried out in the welding of intermediate cone and last ring then.
(a) bottoming welding should guarantee the reverse side formation of weld, and every layer of postwelding measure monitoring (the measurement time once only allows to finish) in 10 minutes, in time adjusts sequence of welding.
(b) shrink rule according to backing weld seam, ranked second layer welding sequencing, control measurement again after welding finishes, comprise plane, bottom-to-top-height, ring skew up and down, for example find in the monitoring that last ring and intermediate cone seam welded gaps between 0 ℃-180 ℃ are big than other position, determine evenly to place foundary weight in this zone for this reason, smooth to guarantee the welding back.
(c) (δ=25mm, 1/2 δ=12.5mm), visual inspection bead appearance quality is measured the monitoring weld seam with laser transit simultaneously and is shunk situation, according to the measurement situation, adjusts one deck sequence of welding down to be welded to thickness of slab one half.
(d) last cap weld accomplishes that smooth surface is smooth.
(e) after welding finishes, produce cooling crack, be heated to 200 ℃, with the asbestos cloth insulation weld seam is slowly cooled off again with heating plate for fear of the weld seam quick cooling.
13.2.10 lifting 8000mm landing slab
Four arcs (dress has welded big bracket the first half, T section bar, stiffener, angle steel on the plate) of lifting 8000mm landing slab, note landing slab 00,900,1800,2700 aligning 12000mm cylinder correspondence positions, the latter half is aimed on 12 big brackets, draw internal orifice radial slack line, the assembling solid welding allocates the weld seam between platen and the last ring and the weld seam of landing slab and cylinder wallboard, the welder carries out the welding of landing slab jigsaw from inside to outside, landing slab and last ring carry out CO2 single face welding with backing etc. then, have the special messenger to monitor the plumb bob skew during welding.
After the welding of single-point float cave finishes, each critical size is all measured with laser transit, observed reading sees the following form
| Project | Theoretical value | Observed reading (aviation value) |
| Last ring levelness | 0-+1 | 0.3 |
| Last ring diameter | ￠3520 0 +5 | +1 |
| Under encircle levelness | 0-+1 | 0 |
| Following ring diameter | ￠9000 0 +5 | +2.6 |
| Height between encircling up and down | 7560 0 +5 | +4.3 |
| The last ring internal diameter center of circle and eccentric between the ring center of circle down | ＜1.5 | 0.5 |
Learn that from last table above-mentioned dimensional accuracy all is controlled in 0～5mm scope, shipowner, ship inspection, APL company carry out an acceptance inspection to this single-point float cave, and by the detection of strictness, shipowner, ship inspection, APL representative think that this Product Acceptance Review is once qualified.
Claims (10)
1, construction method of single-point float socket may further comprise the steps:
(1) construction of intermediate cone;
(2) assembling in float cave and welding;
It is characterized in that:
In the construction of intermediate cone, with 12 blocks of circular cone plates of five equilibrium, connect the center of circular cone and location highly, adopt the symmetrical expression welding, carry out multi-pass welding from bottom to top and connect;
In the assembling in float cave and welding, earlier with the split fix of hull stem, centring, the absolute altitude that centers then, and with this as the gauge reference target line.
2, method of construction according to claim 1, the assembling that it is characterized in that the float cave is carried out according to the following steps with welding:
(1) hull stem split fix;
(2) accurately rule and cut Outer Bottom Plating;
(3) the dress weldering encircles down;
(4) dress stiffener;
(5) ring welds with the outside plate circumferential welded seam down;
(6) dress weldering 800mm platform;
(7) lifting intermediate cone;
(8) big bracket is installed;
(9) adorn the ring of burn-oning;
(10) lifting 8000mm landing slab.
3, method of construction according to claim 2 is characterized in that in (2) step, drew circle on the plate alow according to following ring diameter, cut surplus and beveling of the edge on request then.
4, method of construction according to claim 2 is characterized in that in (3) step, the fore direction of 0 ° of centering adjustment line of following ring, and following ring is by supported at three point, and the levelness suitable for reading of following ring is less than 1mm, and the chain-wales center of circle, the center of circle is aimed in the following ring center of circle, and deviation is less than 1mm.
5, method of construction according to claim 2 is characterized in that at first descending the welding of ring and Outer Bottom Plating in (5) step, and 80 ℃～100 ℃ of weld preheatings adopt multilayer to be symmetrically welded, and each layer welded joint staggers.
6, method of construction according to claim 2, it is characterized in that in (6) step that during lifting 800mm platform, stiffener will connect line location on the Φ 12000mm letter wall, and the levelness that makes stiffener is carried out the welding of landing slab and following ring, landing slab and Φ 12000mm letter wall then less than 2mm.
7, method of construction according to claim 2 is characterized in that in (7) step, accurately its height is also determined in the center of circle of center of location cone, and the center of circle suitable for reading and end opening circle center error are less than 1.5mm.
8, method of construction according to claim 2 is characterized in that 12 big bracket the latter halfs being installed, and fixing with intermediate cone, the spot welding of Φ 12000mm cylinder wallboard respectively in (8) step.
9, method of construction according to claim 2, it is characterized in that in (9) step, during last loop mapping, the levelness suitable for reading of last ring is not more than 1.5mm, and ring highly stays the 8mm amount of contraction up and down, encircles centre deviation up and down less than 1.5mm, and descends ring and intermediate cone earlier, the welded corner joint of big bracket and intermediate cone, big bracket and cylinder wallboard is carried out in the welding of intermediate cone and last ring then.
10, method of construction according to claim 2, it is characterized in that in (10) step, four arcs of lifting 8000mm landing slab, make 0 ° of landing slab, 90 °, 180 °, 270 ° aligning Φ 12000mm cylinder correspondence positions, when big bracket the first half is installed, the latter half is aimed on 12 big brackets, draw internal orifice radial slack line, the assembling solid welding allocates the weld seam between platen and the last ring and the weld seam of landing slab and cylinder wallboard, carry out the welding of landing slab jigsaw from inside to outside, landing slab and last ring carry out CO then
2The single face welding with backing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410016781XA CN100333966C (en) | 2004-03-05 | 2004-03-05 | Construction method of single point mooring float den |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410016781XA CN100333966C (en) | 2004-03-05 | 2004-03-05 | Construction method of single point mooring float den |
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| Publication Number | Publication Date |
|---|---|
| CN1663877A CN1663877A (en) | 2005-09-07 |
| CN100333966C true CN100333966C (en) | 2007-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200410016781XA Expired - Fee Related CN100333966C (en) | 2004-03-05 | 2004-03-05 | Construction method of single point mooring float den |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100427357C (en) * | 2005-11-01 | 2008-10-22 | 江南造船(集团)有限责任公司 | Multifunctional equipment of tool set up in use for installing towed bird type electric propulsion plant |
| CN100441356C (en) * | 2006-09-22 | 2008-12-10 | 四川东风电机厂有限公司 | Steamer generator stator core welding deformation controlling means |
| CN101564577B (en) * | 2009-06-05 | 2015-08-12 | 贵州航天风华精密设备有限公司 | A kind of method reducing medical accelerator support and head plate welding deformation |
| CN102417014B (en) * | 2010-09-27 | 2013-11-27 | 上海利策科技股份有限公司 | Connection structure capable of disconnecting floating production storage and offloading (FPSO) mooring floater and boat body |
| CN102417013B (en) * | 2010-09-27 | 2013-11-27 | 上海利策科技股份有限公司 | Connection and disconnection structure of floating production storage and offloading (FPSO) mooring floater and boat body |
| CN102815369A (en) * | 2012-08-09 | 2012-12-12 | 中国海洋石油总公司 | Maintenance method of counter weight of anchor chain of single point mooring system |
| CN105501393B (en) * | 2016-01-25 | 2017-12-15 | 广州文冲船厂有限责任公司 | A kind of installation method of ship derrick post |
| CN110576939A (en) * | 2019-05-30 | 2019-12-17 | 沪东中华造船(集团)有限公司 | Construction method for large conical cylinder segments |
| CN111136429B (en) * | 2020-01-13 | 2021-12-03 | 海洋石油工程（青岛）有限公司 | Dimension control process for prefabricating single-point mooring cone structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2098171A (en) * | 1981-04-02 | 1982-11-17 | Coflexip | Tanker loading station |
| CN86210505U (en) * | 1986-12-22 | 1987-10-31 | 青岛北海船厂 | Single mooring/seabed oil reservoir |
| GB2297530A (en) * | 1995-02-06 | 1996-08-07 | Bluewater Terminal Systems Nv | Single point mooring system |
| WO2002102653A1 (en) * | 2001-06-19 | 2002-12-27 | K & B Beattie Limited | Seawater intake riser system |
| US6588357B1 (en) * | 2001-04-09 | 2003-07-08 | Fmc Technologies, Inc. | Flex coupling arrangement between upper and lower turret structures |
-
2004
- 2004-03-05 CN CNB200410016781XA patent/CN100333966C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2098171A (en) * | 1981-04-02 | 1982-11-17 | Coflexip | Tanker loading station |
| CN86210505U (en) * | 1986-12-22 | 1987-10-31 | 青岛北海船厂 | Single mooring/seabed oil reservoir |
| GB2297530A (en) * | 1995-02-06 | 1996-08-07 | Bluewater Terminal Systems Nv | Single point mooring system |
| US6588357B1 (en) * | 2001-04-09 | 2003-07-08 | Fmc Technologies, Inc. | Flex coupling arrangement between upper and lower turret structures |
| WO2002102653A1 (en) * | 2001-06-19 | 2002-12-27 | K & B Beattie Limited | Seawater intake riser system |
Non-Patent Citations (1)
| Title |
|---|
| 文昌油田单点系泊系统海上安装 房晓明，中国海上油气(工程)，第15卷第1期 2003 * |
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| CN1663877A (en) | 2005-09-07 |
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