CN102416554A - Technology for making pile legs of wind power installation ship - Google Patents
Technology for making pile legs of wind power installation ship Download PDFInfo
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- CN102416554A CN102416554A CN2011102947892A CN201110294789A CN102416554A CN 102416554 A CN102416554 A CN 102416554A CN 2011102947892 A CN2011102947892 A CN 2011102947892A CN 201110294789 A CN201110294789 A CN 201110294789A CN 102416554 A CN102416554 A CN 102416554A
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Abstract
The invention discloses a technology for making pile legs of a wind power installation ship. The technology comprises the following steps of: making single pipe sections; arranging reinforcing angle steels in the pipe sections; making the first to eleventh pipe sections; butting the first to fourth pipe sections to form a first big subsection, butting the fifth to seventh pipe sections to form a second big subsection, and butting the eighth to eleventh pipe sections to form a third big subsection; separately machining subsections of bolt hole coverage plates around the three big subsections; pre-closing the three big subsections; scribing and assembling the bolt hole coverage plates and making marks; scribing a cylinder along the bolt holes of the coverage plates; detaching the bolt hole coverage plates; cutting the bolt holes in the cylinder in an imitation manner; assembling the coverage plates for the second time; welding the coverage plates; welding an internal seawater-proof structure; polishing after welding; and performing quality control (QC) inspection. According to the subsection making and integral closing technology, the manufacturing precision of integral closing is ensured by controlling the manufacturing precision of subsection making.
Description
Technical field
The present invention relates to a kind of wind-powered electricity generation the manufacture craft of ship spud leg is installed.
Background technology
Nowadays, external wind-powered electricity generation development is conceived to the deep-sea wind-powered electricity generation, the about 20-30 rice of operating water depth, and wind-powered electricity generation mounting platform size is big, and platform weight is big, mostly adopts six leg tooth bars, gear pump elevating mechanism.Basically there is not a wind-powered electricity generation coastal.Domestic do not have a job platform that is applicable to that coastal mudflat wind electric is installed at present, and the motor-driven difficulty of wind-powered electricity generation mounting platform of only bottom-sitting type is influenced greatly by stormy waves, relies on tidewater, and installation accuracy has satisfied not the demand of wind-powered electricity generation installation.
Coastal wind-powered electricity generation is installed the required 4 spud leg hydraulic lifting systems of ship, can solve coastal wind-powered electricity generation installation and influenced by stormy waves, and platform arrives the assigned address that wind-powered electricity generation is installed, and uses hydraulic lifting system that platform is risen, locatees and carry out the wind-powered electricity generation installation exercise.Wind-powered electricity generation is installed and is divided into piling work and two steps of wind tower installation exercise.The work pattern that floating wind-powered electricity generation mounting platform is installed wind power equipment is: platform is motor-driven to utilize mooring system that platform is carried out coarse positioning to assigned address, beginning wind-powered electricity generation installation exercise.Owing to receive wave and tidewater to go up and down to influence, the step of driving piles location is difficult to control, needs good sea situation ability operation.Dock wind-power tower, cabin and fan blade poor efficiency in the lifting step process, be difficult to the accurate in locating butt joint, often repeatedly butt joint could be accomplished, and causes installing complete wind tower needs and arrives week age in several days, has satisfied not the demand that wind-powered electricity generation is installed.And the wind-powered electricity generation mounting platform that uses hydraulic lifting system can solve the problem of wave and tidewater, equipped motor-driven the putting in place of platform of hydraulic lifting system after, the use hydraulic lifting system rises platform; Platform leaves the water surface; Not influenced by stormy waves and tidewater, piling and lifting operation can carry out continuously, and a wind tower generally is installed only needs about two days; Improved operating efficiency greatly; Satisfy the demand that wind-powered electricity generation is installed, so when making spud leg, need control the precision and the accuracy of manufacture of spud leg in segmentation is made of spud leg circularity well.
Summary of the invention
The objective of the invention is in order to overcome above deficiency the manufacture craft that provides a kind of easy to operate, time saving and energy saving, safe and reliable wind-powered electricity generation that the ship spud leg is installed.
The object of the invention is realized through following technical scheme: a kind of wind-powered electricity generation is installed the manufacture craft of ship spud leg, may further comprise the steps:
The making of A, single tube coupling:
(1), roll before thickness, size, diagonal, the flatness of check steel plate, a kind dotting punch is struck in line, the next process of being allowed for access after qualified;
(2), roll before earlier with hydraulic press the veneer reeling machine volume press less than the plate end regions according to tube coupling radius pressure arc, leave groove;
(3), tube coupling will make the detection model before rolling, and detects the inside and outside pattern of model, model length should be greater than 1/3 circumference;
(4), tube coupling carry out roller system after the accurate positioning on the roller bed;
(5), pressure head on the roller bed and roller bowlder machined surface and model gap requirement≤2.0mm;
(6), the steel plate of end press-bending radian delivers to veneer reeling machine and carries out tube coupling and roll, the butt joint dislocation of steel plate is controlled in the 2mm, plate seam two ends are used with the steel plate of material stack pile and are fixed as run-on tab, mid portion is tack welding in the outside, i.e. 1/3 groove side;
(7), the tube coupling that rolls end is through can weld after the assay was approved; Tube coupling rolls the longitudinal joint butt joint and adopts Lincoln weld: install run-on tab before the welding, and scrutiny groove linearity, flatness, bevel angle and cleannes, require single tube coupling linearity less than 2mm; Flatness is less than 2mm; Require combination back angle greater than 50 ° for V or X type groove, groove inner surface smooth metal luster adopts SAW to weld automatically after the passed examination; Carry out back gouging after requiring one side weld, carefully polish behind the back chipping to satisfy and carry out SAW again after the above-mentioned requirements and weld automatically;
(8), tube coupling cylindrical shell piece welding, preheat temperature is 80-100 ° of C before the welding;
(9), UT detect qualified after, Hui Yuan, diameter tolerance ± 2mm can flow into next procedure after the assay was approved;
The inside of B, tube coupling is installed and is strengthened angle steel:
(1), the inner angle steel theoretical size Φ 3204 that strengthens, actual fabrication is of a size of Φ 3200;
(2), the 16mm flanged plate of the strengthening angle steel jigsaw of going ahead of the rest; The inner 26*300 stiffening ring of dress weldering, and the small gusset of 16mm then, Φ 3200 ± 2mm when requiring the final external diameter 48mm wall thickness of strengthening angle steel; Φ 3210 ± 2mm during the 42mm wall thickness can flow into next procedure after the assay was approved;
C, reinforcement angle steel assemble: in order to utilize the inner reversible deformation effect of strengthening angle steel, the inner reinforcement angle steel of each tube coupling can assemble spot welding earlier, treats the dress weldering of ruling again after two tube couplings splice;
D, spud leg are made up of 11 tube couplings, are respectively first tube coupling, second tube coupling, the 3rd tube coupling, the 4th tube coupling, the 5th tube coupling, the 6th tube coupling, the 7th tube coupling, the 8th tube coupling, the 9th tube coupling, the tenth tube coupling and the 11 tube coupling;
F, first tube coupling, second tube coupling, the 3rd tube coupling and the butt joint of the 4th tube coupling are formed first segmentation; Second largest segmentation is formed in the 5th tube coupling, the 6th tube coupling and the butt joint of the 7th tube coupling, the third-largest segmentation is formed in the 8th tube coupling, the 9th tube coupling, the tenth tube coupling and the butt joint of the 11 tube coupling;
The independent machined of pin hole cladding plate segmentation around G, three the big segmentations, machined is pressed the part drawing bevel after finishing;
H, three big segmentations are closed up in advance:
(1), at first check each segmentation circularity, longitudinal size deviation, can close up in advance after qualified;
(2), the segmentation joint uses the horse plate of stack pile ad eundem to connect, segmentation position groove is more special, closes up place's cylindrical shell butt joint form,
(3), at first second largest segmentation and the third-largest segmentation are closed up in advance, the place of closing up uses the horse plate to fix;
(4), segmentation and the first segmentation of secondly above-mentioned steps being closed up formation close up in advance, the place's of closing up use horse plate is fixed;
(5), in advance check the circularity of whole spud leg part after closing up, the longitudinal size deviation can be carried out the cladding plate assembling after qualified;
Said pin hole cladding plate and marked among I, the line installation step G:
(1), on cladding plate, draws 4 vertical datum lines of right-angled intersection and pin hole lateral fiducial line;
(2), first block of cladding plate begins assembling from the bottom, joins by above-mentioned marking-out rule little progress luggage, pays special attention to two pin hole longitudinal pitch tolerances about the cladding plate edge joint position; Assembling examination requirements pin hole longitudinal pitch tolerance+1mm; 10 hole cumulative errors 5mm, horizontal spacing tolerance+1.5mm, lower deviation is not more than 1mm on four pin holes of same horizontal level; The pin hole centrally aligned spud leg center of circle, about with the center line of front and back should be orthogonal;
J, on cylindrical shell, rule along the cladding plate pin hole:
(1), cleaning eye inner barrel surface, require the surface smooth-going, smooth;
(2), on cylindrical shell, rule along cladding plate pin hole profile, rule must be perpendicular to drum surface, lines must be clear;
K, lay down the pin hole cladding plate:
(1), on the cladding plate that assembles marked, require must clear and definite every block of cladding plate the position, the termination towards;
(2), lay down the pin hole cladding plate, and put neatly, put by group;
Pin hole on L, the shape cutting cylindrical shell:
(1), cut behind first pin hole after the check size, can continue cutting;
(2), cladding plate closing up about seam each 100mm line and cutting, and spot welding is nearby on the cylindrical shell, the scene closes up the fashionable dress weldering;
M, the assembling of cladding plate secondary:
(1), be assembled to cladding plate on the spud leg successively by ready-made flag sequence after, be up to the standards and weld;
(2), postwelding polishing pin hole is inner;
N, the inner anti-seawater structure of dress weldering are advanced the inner anti-seawater structure of spud leg interior welds, report the QC check before the welding, and postwelding polishes smooth;
O, close up and apply for checking and examination in advance, final inspection requires: check whole spud leg diameter of phi 3300 ± 2mm, and ovality 10mm, straightness error is no more than 5mm in any spud leg length of the linearity 12m scope, and the check pin hole report QC to check.
The present invention compared with prior art has the following advantages:
The present invention adopts sectional making, and the technical matters that final integral is closed up through the accuracy of manufacture of control sectional making, guarantees the whole accuracy of manufacture of closing up.Can make the spud leg accuracy of manufacture requirement of finally producing be: whole spud leg diameter of phi 3300 ± 2mm; Ovality 10mm; Straightness error is no more than 5mm in any spud leg length of the linearity 12m scope.
The specific embodiment:
In order to deepen to understanding of the present invention, will combine embodiment that the present invention is made further detailed description below, this embodiment only is used to explain the present invention, does not constitute the qualification to protection domain of the present invention.
Wind-powered electricity generation of the present invention is installed a kind of specific embodiment of the manufacture craft of ship spud leg, may further comprise the steps:
The making of A, single tube coupling, the control of volume circle precision, up to standard ± 2mm:
(1), roll before thickness, size, diagonal, the flatness of check steel plate, a kind dotting punch is struck in line, the next process of being allowed for access after qualified;
(2), roll before earlier with hydraulic press the veneer reeling machine volume press less than the plate end regions according to tube coupling radius pressure arc, leave groove;
(3), tube coupling will make the detection model before rolling, and detects the inside and outside pattern of model, model length should be greater than 1/3 circumference;
(4), tube coupling carry out roller system after the accurate positioning on the roller bed;
(5), pressure head on the roller bed and roller bowlder machined surface and model gap requirement≤2.0mm;
(6), the steel plate of end press-bending radian delivers to veneer reeling machine and carries out tube coupling and roll, the butt joint dislocation of steel plate is controlled in the 2mm, plate seam two ends are used with the steel plate of material stack pile and are fixed as run-on tab, mid portion is tack welding in the outside, i.e. 1/3 groove side;
(7), the tube coupling that rolls end is through can weld after the assay was approved; Tube coupling rolls the longitudinal joint butt joint and adopts Lincoln weld: install run-on tab before the welding, and scrutiny groove linearity, flatness, bevel angle and cleannes, require single tube coupling linearity less than 2mm; Flatness is less than 2mm; Require combination back angle greater than 50 ° for V or X type groove, groove inner surface smooth metal luster adopts SAW to weld automatically after the passed examination; Carry out back gouging after requiring one side weld, carefully polish behind the back chipping to satisfy and carry out SAW again after the above-mentioned requirements and weld automatically;
(8), tube coupling cylindrical shell piece welding, preheat temperature is 80-100 ° of C before the welding;
(9), UT detect qualified after, Hui Yuan, diameter tolerance ± 2mm can flow into next procedure after the assay was approved;
The inside of B, tube coupling is installed and is strengthened angle steel:
(1), the inner angle steel theoretical size Φ 3204 that strengthens, actual fabrication is of a size of Φ 3200;
(2), the 16mm flanged plate of the strengthening angle steel jigsaw of going ahead of the rest; The inner 26*300 stiffening ring of dress weldering, and the small gusset of 16mm then, Φ 3200 ± 2mm when requiring the final external diameter 48mm wall thickness of strengthening angle steel; Φ 3210 ± 2mm during the 42mm wall thickness can flow into next procedure after the assay was approved;
C, reinforcement angle steel assemble: in order to utilize the inner reversible deformation effect of strengthening angle steel, the inner reinforcement angle steel of each tube coupling can assemble spot welding earlier, treats the dress weldering of ruling again after two tube couplings splice;
D, spud leg are made up of 11 tube couplings, are respectively first tube coupling, second tube coupling, the 3rd tube coupling, the 4th tube coupling, the 5th tube coupling, the 6th tube coupling, the 7th tube coupling, the 8th tube coupling, the 9th tube coupling, the tenth tube coupling and the 11 tube coupling;
F, first tube coupling, second tube coupling, the 3rd tube coupling and the butt joint of the 4th tube coupling are formed first segmentation; Second largest segmentation is formed in the 5th tube coupling, the 6th tube coupling and the butt joint of the 7th tube coupling, the third-largest segmentation is formed in the 8th tube coupling, the 9th tube coupling, the tenth tube coupling and the butt joint of the 11 tube coupling;
The independent machined of pin hole cladding plate segmentation around G, three the big segmentations, machined is pressed the part drawing bevel after finishing;
H, three big segmentations are closed up in advance:
(1), at first check each segmentation circularity, longitudinal size deviation, can close up in advance after qualified;
(2), the segmentation joint uses the horse plate of stack pile ad eundem to connect, segmentation position groove is more special, closes up place's cylindrical shell butt joint form,
(3), at first second largest segmentation and the third-largest segmentation are closed up in advance, the place of closing up uses the horse plate to fix;
(4), segmentation and the first segmentation of secondly above-mentioned steps being closed up formation close up in advance, the place's of closing up use horse plate is fixed;
(5), in advance check the circularity of whole spud leg part after closing up, the longitudinal size deviation can be carried out the cladding plate assembling after qualified;
Said pin hole cladding plate and marked among I, the line installation step G:
(1), on cladding plate, draws 4 vertical datum lines of right-angled intersection and pin hole lateral fiducial line;
(2), first block of cladding plate begins assembling from the bottom, joins by above-mentioned marking-out rule little progress luggage, pays special attention to two pin hole longitudinal pitch tolerances about the cladding plate edge joint position; Assembling examination requirements pin hole longitudinal pitch tolerance+1mm; 10 hole cumulative errors 5mm, horizontal spacing tolerance+1.5mm, lower deviation is not more than 1mm on four pin holes of same horizontal level; The pin hole centrally aligned spud leg center of circle, about with the center line of front and back should be orthogonal;
J, on cylindrical shell, rule along the cladding plate pin hole:
(1), cleaning eye inner barrel surface, require the surface smooth-going, smooth;
(2), on cylindrical shell, rule along cladding plate pin hole profile, rule must be perpendicular to drum surface, lines must be clear;
K, lay down the pin hole cladding plate:
(1), on the cladding plate that assembles marked, require must clear and definite every block of cladding plate the position, the termination towards;
(2), lay down the pin hole cladding plate, and put neatly, put by group;
Pin hole on L, the shape cutting cylindrical shell:
(1), cut behind first pin hole after the check size, can continue cutting;
(2), cladding plate closing up about seam each 100mm line and cutting, and spot welding is nearby on the cylindrical shell, the scene closes up the fashionable dress weldering;
M, the assembling of cladding plate secondary:
(1), be assembled to cladding plate on the spud leg successively by ready-made flag sequence after, be up to the standards and weld;
(2), postwelding polishing pin hole is inner;
N, the inner anti-seawater structure of dress weldering are advanced the inner anti-seawater structure of spud leg interior welds, report the QC check before the welding, and postwelding polishes smooth;
O, close up and apply for checking and examination in advance, final inspection requires: check whole spud leg diameter of phi 3300 ± 2mm, and ovality 10mm, straightness error is no more than 5mm in any spud leg length of the linearity 12m scope, and the check pin hole report QC to check.
The diameter of spud leg is 3300mm, material EH36, and cylindrical shell thickness 48mm, therefore for ovality after guaranteeing the spud leg general assembly reaches 10mm, spud leg diameter 3300mm ± 2mm then must guarantee volume circle precision.Because spud leg thickness of slab and groove processing are difficult for, and the secondary operations thermal deformation is big, can cause back the circle difficulty, therefore the volume circle rolls with the four stars roller, and the adjustment crush pad.Measure girth control ± 5mm with the interior sheet material percentage elongation of controlling the volume bowlder.The volume circle is checked: the adjustment support bar, and the making circumference when circularity is not enough, is regulated Philip's head screw greater than 1/4 original mold inspection circularity, use external force adjustment circularity.The welding longitudinal joint, but capping not guarantees that weld seam does not exceed the steel plate plane, and is UT, guarantees weldquality.Hui Yuan: tack welding location behind the Hui Yuan, and adopt special transportation tool carrying to guarantee not deform in the carrying way, require diameter be controlled at ± 2mm in.The welding capping, fine setting is done in welding cooling back secondary measurement.
Above-mentioned welding 100% usefulness welding cross, SAW welds automatically, and purpose reduces distortion, improves the quality.Simultaneously, for marking four jiaos of position lines and circumference 90 degree, 180 degree, 270 degree bisectors behind the subsequent production jigsaw, guarantee the single cylinder concentricity.
100% adopts the auxiliary butt joint of turning rolls during butt joint, guarantees precision with equipment; To cylindrical shell propping reinforcement degree, solidify the single cylinder precision, its central point can connect during the reinforcement supported design, utilizes laser transit to detect control; Circumferential weld 100% adopts cross to add roller moulding bed welding minimizing seam deformation.
Wind-powered electricity generation is installed crane ship has 4 pile legs, the cylindrical shell class formation, and each spud leg length is L=58084mm, the every pile leg of barrel diameter D=3300mm. weight is about 304.5 tons, totally 1218 tons of 4 pile legs.It is the deck of boat of CCSEH36 that spud leg cylindrical shell roller plectane has adopted 48mm, 42mm grade; All to have adopted the 48mm grade be the deck of boat of CCSEH36 to the pin hole cladding plate all around; It is the angle steel of CCSA36 that middle angle steel stiffening ring has adopted the L160*100*14 grade; Inner loop has adopted 16mm, 26mm respectively to strengthening dividing plate, and grade is CCSAH36 and CCSDH36, and it is the CCSDH36 deck of boat that hanger has adopted the 32mm grade.Inner anti-seawater structure all adopts the deck of boat of 12mmCCSAH36.
The present invention adopts sectional making, and the technical matters that final integral is closed up through the accuracy of manufacture of control sectional making, guarantees the whole accuracy of manufacture of closing up.Can make the spud leg accuracy of manufacture requirement of finally producing be: whole spud leg diameter of phi 3300 ± 2mm; Ovality 10mm; Straightness error is no more than 5mm in any spud leg length of the linearity 12m scope.
Claims (1)
1. a wind-powered electricity generation is installed the manufacture craft of ship spud leg, it is characterized in that: may further comprise the steps:
The making of A, single tube coupling:
(1), roll before thickness, size, diagonal, the flatness of check steel plate, a kind dotting punch is struck in line, the next process of being allowed for access after qualified;
(2), roll before earlier with hydraulic press the veneer reeling machine volume press less than the plate end regions according to tube coupling radius pressure arc, leave groove;
(3), tube coupling will make the detection model before rolling, and detects the inside and outside pattern of model, model length should be greater than 1/3 circumference;
(4), tube coupling carry out roller system after the accurate positioning on the roller bed;
(5), pressure head on the roller bed and roller bowlder machined surface and model gap requirement≤2.0mm;
(6), the steel plate of end press-bending radian delivers to veneer reeling machine and carries out tube coupling and roll, the butt joint dislocation of steel plate is controlled in the 2mm, plate seam two ends are used with the steel plate of material stack pile and are fixed as run-on tab, mid portion is tack welding in the outside, i.e. 1/3 groove side;
(7), the tube coupling that rolls end is through can weld after the assay was approved; Tube coupling rolls the longitudinal joint butt joint and adopts Lincoln weld: install run-on tab before the welding, and scrutiny groove linearity, flatness, bevel angle and cleannes, require single tube coupling linearity less than 2mm; Flatness is less than 2mm; Require combination back angle greater than 50 ° for V or X type groove, groove inner surface smooth metal luster adopts SAW to weld automatically after the passed examination; Carry out back gouging after requiring one side weld, carefully polish behind the back chipping to satisfy and carry out SAW again after the above-mentioned requirements and weld automatically;
(8), tube coupling cylindrical shell piece welding, preheat temperature is 80-100 ° of C before the welding;
(9), UT detect qualified after, Hui Yuan, diameter tolerance ± 2mm can flow into next procedure after the assay was approved;
The inside of B, tube coupling is installed and is strengthened angle steel:
(1), the inner angle steel theoretical size Φ 3204 that strengthens, actual fabrication is of a size of Φ 3200;
(2), the 16mm flanged plate of the strengthening angle steel jigsaw of going ahead of the rest; The inner 26*300 stiffening ring of dress weldering, and the small gusset of 16mm then, Φ 3200 ± 2mm when requiring the final external diameter 48mm wall thickness of strengthening angle steel; Φ 3210 ± 2mm during the 42mm wall thickness can flow into next procedure after the assay was approved;
C, reinforcement angle steel assemble: in order to utilize the inner reversible deformation effect of strengthening angle steel, the inner reinforcement angle steel of each tube coupling can assemble spot welding earlier, treats the dress weldering of ruling again after two tube couplings splice;
D, spud leg are made up of 11 tube couplings, are respectively first tube coupling, second tube coupling, the 3rd tube coupling, the 4th tube coupling, the 5th tube coupling, the 6th tube coupling, the 7th tube coupling, the 8th tube coupling, the 9th tube coupling, the tenth tube coupling and the 11 tube coupling;
F, first tube coupling, second tube coupling, the 3rd tube coupling and the butt joint of the 4th tube coupling are formed first segmentation; Second largest segmentation is formed in the 5th tube coupling, the 6th tube coupling and the butt joint of the 7th tube coupling, the third-largest segmentation is formed in the 8th tube coupling, the 9th tube coupling, the tenth tube coupling and the butt joint of the 11 tube coupling;
The independent machined of pin hole cladding plate segmentation around G, three the big segmentations, machined is pressed the part drawing bevel after finishing;
H, three big segmentations are closed up in advance:
(1), at first check each segmentation circularity, longitudinal size deviation, can close up in advance after qualified;
(2), the segmentation joint uses the horse plate of stack pile ad eundem to connect, segmentation position groove is more special, closes up place's cylindrical shell butt joint form,
(3), at first second largest segmentation and the third-largest segmentation are closed up in advance, the place of closing up uses the horse plate to fix;
(4), segmentation and the first segmentation of secondly above-mentioned steps being closed up formation close up in advance, the place's of closing up use horse plate is fixed;
(5), in advance check the circularity of whole spud leg part after closing up, the longitudinal size deviation can be carried out the cladding plate assembling after qualified;
Said pin hole cladding plate and marked among I, the line installation step G:
(1), on cladding plate, draws 4 vertical datum lines of right-angled intersection and pin hole lateral fiducial line;
(2), first block of cladding plate begins assembling from the bottom, joins by above-mentioned marking-out rule little progress luggage, pays special attention to two pin hole longitudinal pitch tolerances about the cladding plate edge joint position; Assembling examination requirements pin hole longitudinal pitch tolerance+1mm; 10 hole cumulative errors 5mm, horizontal spacing tolerance+1.5mm, lower deviation is not more than 1mm on four pin holes of same horizontal level; The pin hole centrally aligned spud leg center of circle, about with the center line of front and back should be orthogonal;
J, on cylindrical shell, rule along the cladding plate pin hole:
(1), cleaning eye inner barrel surface, require the surface smooth-going, smooth;
(2), on cylindrical shell, rule along cladding plate pin hole profile, rule must be perpendicular to drum surface, lines must be clear;
K, lay down the pin hole cladding plate:
(1), on the cladding plate that assembles marked, require must clear and definite every block of cladding plate the position, the termination towards;
(2), lay down the pin hole cladding plate, and put neatly, put by group;
Pin hole on L, the shape cutting cylindrical shell:
(1), cut behind first pin hole after the check size, can continue cutting;
(2), cladding plate closing up about seam each 100mm line and cutting, and spot welding is nearby on the cylindrical shell, the scene closes up the fashionable dress weldering;
M, the assembling of cladding plate secondary:
(1), be assembled to cladding plate on the spud leg successively by ready-made flag sequence after, be up to the standards and weld;
(2), postwelding polishing pin hole is inner;
N, the inner anti-seawater structure of dress weldering are advanced the inner anti-seawater structure of spud leg interior welds, report the QC check before the welding, and postwelding polishes smooth;
O, close up and apply for checking and examination in advance, final inspection requires: check whole spud leg diameter of phi 3300 ± 2mm, and ovality 10mm, straightness error is no more than 5mm in any spud leg length of the linearity 12m scope, and the check pin hole report QC to check.
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