CN107825077B - It is a kind of to rise self-propulsion type platform leg building technology certainly - Google Patents
It is a kind of to rise self-propulsion type platform leg building technology certainly Download PDFInfo
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- CN107825077B CN107825077B CN201711135067.6A CN201711135067A CN107825077B CN 107825077 B CN107825077 B CN 107825077B CN 201711135067 A CN201711135067 A CN 201711135067A CN 107825077 B CN107825077 B CN 107825077B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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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
- B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
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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
-
- 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
- B23K9/235—Preliminary treatment
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
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- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The present invention relates to a kind of from liter self-propulsion type platform leg building technology, including shell ring part manufacturing, shell ring spreading, structure scribing line, Standard, rack-plate welding equipment, structure inspection declaration, the installation of interior attachment, water gauge installation, transhipment sandblasting process.The present invention has the advantages that spud leg is segmented into tube structure, a segmentation is assembled by the splicing of multiple shell rings, efficiency of construction is improved, reduces construction cost；Vertical stiffeners, T-type stiffening ring each serve as longitudinal and laterally fixed reinforcement effect, and structural tube plays lateral booster action in inner barrel, guarantees the intensity of pile leg structure；The construction precision of rack-plate is improved by constraining the main indicators such as straightness, space width and common normal spacing of rack-plate, the supportive and stability of spud leg is improved, avoids welding deformation or weld cracking.
Description
Technical field
The present invention relates to from self-propulsion type marine drilling platform field is risen, in particular to a kind of self-propulsion type platform leg that rises certainly is built
Make technique.
Background technique
With the quickening of offshore wind farm energy development paces, the development prospect that wind-powered electricity generation installs equipment is more and more wide.From liter
Also there is the situation that supply falls short of demand in the required equipment that self-propulsion type marine drilling platform is installed and used as wind-powered electricity generation tubular pole, natural
Also become one of the working ship that major equipment enterprise falls over each other manufacture.When working from liter self-propulsion type marine drilling platform, usually use
Elevating mechanism protects it from sea beat for more than platform raising to ocean face, by spud leg supported standing across the sea into
Row drilling well work after completing probing task, falls Zi self-propulsion type platform is risen to sea, spud leg is elevated to towage position
Will be Zi the towage of self-propulsion type platform be risen to next operation well location, therefore, spud leg is the key that from liter self-propulsion type marine drilling platform
One of component.
Spud leg is one of most important component of ocean platform, is the main bearing carrier of platform, therefore is welded to its rack-plate
Quality requirement it is very stringent, therefore when building marine drilling platform, rack-plate welding and its precision controlling always in occupation of
Highly important status.A kind of jack up wind electric power ship spud leg building technology disclosed in application number 201610013969.1, including cylinder
Body rolls, welding, workshop preassembling, pin hole cut four processing steps between cylinder, and it is very high-intensitive which sets clocking requirement
While require mitigation own wt as far as possible, to use the high-strength steel sheet of the E690 material of 70mm thickness to make
The cylinder for making diameter only 3600mm has the advantages that improve efficiency of construction, reduces construction cost, but the patent lacks rack gear
Plate assembling and welding process step, therefore the supportive of spud leg is poor with stability, easily causes welding deformation or weld cracking.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of raising spud leg construction precision, guarantee the supportive of spud leg and steady
Qualitatively from liter self-propulsion type platform leg building technology.
In order to solve the above technical problems, the technical solution of the present invention is as follows: a kind of from rising self-propulsion type platform leg building technology,
Its innovative point is: including shell ring part manufacturing, shell ring spreading, structure scribing line, Standard, rack-plate welding equipment, structure inspection declaration,
Interior attachment installation, water gauge installation, transhipment sandblasting process.
Further, the step specifically:
A) it shell ring part manufacturing: including CNC cutting, scribing line, bevelling, rolls bent plate, check ovality, before weldering
Positioning, longitudinal seam welding, Welding Testing, ovality are examined, correct return sired results sequence；
B) shell ring spreading: utilizing grouping machine and the piecewise spreading shell ring of turning rolls, and when docking pays attention to angle position locating for longitudinal joint
It sets, is rushed a little with reference to ocean, automatic welding assembles after spot welding positioning, and shell ring spot welding needs to detect cylinder height when positioning, after cylinder spreading
Height tolerance require control between -1 ~+2mm；
C) structure is crossed: after shell ring spreading, annular reinforcement and platform structure line, while reinforcing rib are up marked from bottom
FB60 × 300 and the installation site of rack-plate should cross simultaneously, and two lines are just reported after the completion of barrel front and back sides, structure scribing line
Inspection；
D) Standard: according to scribing position assembling structure, the vertical stiffeners of FB60 × 300 are successively installed, T-type is reinforced
The structural tube of circle, φ 219.1 × 8.18 prevents the reinforcing rib of FB60 × 300 from occurring to misplace in installation and welding process and weld
Deformation；
Spud leg: being gone to certain position right angle setting when installation rack-plate by e) rack-plate welding equipment on turning rolls, when installation
Need to guarantee the vertical stiffeners of FB60 × 300 in rack-plate and cylinder to just, to rack-plate assembly after, reinforce tooling into
Row is fixed, and is deformed in the welding process with controlling rack gear, after the completion of rack-plate welding, is detected and is cut more than upper sleeve again
Amount is ± 1.0mm when space width tolerance level of the rack-plate to interface is assembled when rack-plate spreading, vertically closes up assembly
When be ± 1.5mm, the spacing tolerance between rack-plate common normal controls within ± 3.0mm；
F) structure inspection declaration: checking the straightness of cylinder, checks rack-plate straightness, flatness, common normal spacing；
G) attachment is installed in: terminating simultaneously to install internal duct, outfititem etc. after the assay was approved in single spud leg sectional making
Contents structure pays attention to installation dimension in interior attachment installation process；
H) water gauge is installed: the internal-external accessory of installation spelter, water gauge mark；
I) it transports sandblasting: positioning enough transhipment supporting points, to prevent transport and sandblasting procedures from cylinder, rack-plate being caused to become
Shape.
Further, in the step a, the step of shell ring part manufacturing specifically:
1) CNC cutting: pressing CNC cutting figure cutting stock, and part size is checked after blanking, indicates plate thickness, material on part
Matter, piece number, groove, slope type, machining information, wherein machining information is bending radius, rolls direction, for there is the set of clout
Material figure, is numbered clout, is tracked and is utilized with convenient material；
2) cross: marking equal part with corresponding data by drawing and examine line and four buses, i.e., 0 ° of cylinder, 90 °,
180 °, 270 ° of lines, and stamp foreign punch mark；
3) bevelling: by jacking figure requirement bevel, groove direction is distinguished with working as front and non-present face；
4) it rolls bent plate: plate being rolled into cylinder using veneer reeling machine, plate longitudinal joint position does not place surplus, coiling process
The middle circularity that cylinder is checked with iron sheet template, longitudinal joint gap guarantees within 23 mm after the completion of rolling, and docking dislocation is no more than
/ 10th or 3.2mm of plate thickness, the two are minimized, and cylinder both ends mistake skin is no more than 1.5 mm；
5) check ovality: ovality when rolling requires control within 8.0mm, cylinder external diameter allowance control+
Within 2.0-6.0mm, it should be corrected when being unable to satisfy；
6) weld prelocalization: cylinder rolls, is located on veneer reeling machine and disposably completes, and plate is to wrong plate ≯ 2mm, plate stitch two
End is used the steel plate of at least 100mm long same material condition of equivalent thickness as arc-extinguishing plate is drawn and is fixed, the middle section same material for having welding hole
Matter horse plate is fixed, and horse plate length is 10 times of mother metal thickness；
7) longitudinal seam welding: being welded using longitudinal joint of the Lincoln weld to the cylinder after rolling, and welding material selects WPS
It provides wlding, first welding bead is cleaned out before welding, first cylinder inside is welded, then back chipping, capping are dug to carbon on the outside of cylinder；
8) Welding Testing: being delivered for a check after welding, including Welding Testing and dimension control, and weld seam is carried out after 48 hours
Flaw detection；
9) ovality is examined: after the completion of longitudinal seam welding of barrel, ovality must detect again, especially welding around the cylinder
Outside；
10) correct Hui Yuan: it is round re-compacted until satisfaction is wanted not reach should adjusting back for requirement for ovality after welding
Until asking.
Further, in the step 9, the detection method of ovality are as follows: one, with iron sheet template detect locally ellipticity, and
Position is finished with slate pencil；Two, the circularity that cylinder is measured with box ruler, using a quarter of cylinder perimeter or 1/8th pipeline sections as base
Standard measures, and measured size is write on steel pipe；Three, production and cylinder are each one with the inside and outside template of diameter, template width
200mm or so, length determine that template is determined with longitudinal joint bevelled edge gap by caliber according to pipe diameter size.
Further, in the step 9, the relationship of template and longitudinal joint bevelled edge gap and caliber: when caliber is
When 400mm 700mm, gap is 02 mm；When caliber is 700 1000 mm of mm, gap is 13 mm；Work as caliber
When 1000 mm or more, gap is 24 mm.
Further, it in the step 7, needs to be preheated before longitudinal seam welding, pre-heating mean uses flame or electric heating
Device carries out, and should control interlayer temperature in welding process, postwelding should control cooling velocity.
Further, when using manual electric arc welding in the step e, when rack-plate welds, two are welded by eight welders
Seam carries out symmetrical welding simultaneously, when using Lincoln weld, by overturning to two weld seams progress symmetrical weldings, in welding process
It is uninterrupted to carry out size monitoring.
The present invention has the advantages that in the present invention, spud leg is segmented into tube structure, one is assembled by the splicing of multiple shell rings
Segmentation improves efficiency of construction, reduces construction cost；Vertical stiffeners, T-type stiffening ring each serve as longitudinal and lateral fix and add
Strong effect, structural tube play lateral booster action in inner barrel, guarantee the intensity of pile leg structure；Pass through constraint rack-plate
The main indicators such as straightness, space width and common normal spacing improve the construction precision of rack-plate, improve the supportive of spud leg with
Stability avoids welding deformation or weld cracking.
It needs to be preheated before longitudinal seam welding, pre-heating mean is carried out using flame or electric heater, and shell ring produces in order to prevent
Raw crackle and reduction residual stress.
When using manual electric arc welding when rack-plate welds, symmetrical welding is carried out simultaneously to two weld seams by eight welders, is adopted
When with Lincoln weld, symmetrical welding is carried out to two weld seams by overturning, size monitoring is uninterruptedly carried out in welding process, protects
Card welding is heated evenly, and appearance of weld is beautiful, guarantees integral solder quality.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is the rack gear tolerance schematic diagram during the rack-plate welding equipment in step e of the invention.
Fig. 2 is the misalignment schematic diagram of butt weld in the present invention.
Fig. 3 be the present invention in fillet weld to positive schematic diagram.
Fig. 4 is for middle rack seat board of the present invention with spud leg outside plate fillet weld to positive schematic diagram.
Fig. 5 is stringers, inner supporting structure panel in the present invention to positive schematic diagram.
Fig. 6 is stringers, inner supporting structure short transverse in the present invention to positive schematic diagram.
Specific embodiment
The following examples can make professional and technical personnel that the present invention be more fully understood, but therefore not send out this
It is bright to be limited among the embodiment described range.
Of the invention rises self-propulsion type platform leg building technology certainly, passes through shell ring part manufacturing, shell ring spreading, structure and draws
Line, Standard, rack-plate welding equipment, structure inspection declaration, the installation of interior attachment, water gauge is installed, transhipment sandblasting coordination of processes is realized,
The specific steps of which are as follows:
One, shell ring part manufacturing:
The first step, CNC cutting: pressing CNC cutting figure cutting stock, and part size is checked after blanking, indicates plate on part
Thickness, material, piece number, groove, slope type, machining information, wherein machining information is bending radius, rolls direction, for having a surplus
The jacking figure of material, is numbered clout, is tracked and is utilized with convenient material.
Second step, scribing line: marking equal part with corresponding data by drawing and examine line and four buses, i.e., 0 ° of cylinder,
90 °, 180 °, 270 ° of lines, and stamp foreign punch mark.
Bevelling: third step by jacking figure requirement bevel, should be noted groove direction, groove side in bevel
It is distinguished to work as front and non-present face.
4th step, rolls bent plate: plate being rolled into cylinder using veneer reeling machine, plate longitudinal joint position does not place surplus, volume
The circularity of cylinder is checked during system with iron sheet template, longitudinal joint gap guarantees within 23 mm after the completion of rolling, docking dislocation
No more than 1/10th or 3.2mm of plate thickness, the two is minimized, and cylinder both ends mistake skin is no more than 1.5 mm.
5th step checks ovality: ovality when rolling requires control within 8.0mm, cylinder external diameter (φ 3300)
Allowance control should correct when being unable to satisfy within+2.0-6.0mm.
6th step, weld prelocalization: cylinder rolls, is located on veneer reeling machine and disposably completes, plate to wrong plate ≯ 2mm,
Plate stitch both ends are used the steel plate of at least 100mm long same material condition of equivalent thickness as arc-extinguishing plate is drawn and are fixed, and middle section was with there is welding hole
Same material horse plate fix, horse plate length is 10 times of mother metal thickness.
7th step, longitudinal seam welding: being welded using longitudinal joint of the Lincoln weld to cylinder, and welding material selects WPS rule
Determine wlding, first welding bead is cleaned out before welding, first cylinder inside is welded, then back chipping, capping are dug to carbon on the outside of cylinder,
It needing to be preheated before longitudinal seam welding, pre-heating mean is carried out using flame or electric heater, interlayer temperature should be controlled in welding process,
Postwelding should control cooling velocity, and shell ring cracks and reduce residual stress in order to prevent.
8th step, Welding Testing: being delivered for a check after welding, including Welding Testing and dimension control, and 48 hours laggard
Row seam inspection.
9th step, ovality are examined: after the completion of longitudinal seam welding of barrel, ovality must detect again, especially welding week
The outside of cylinder is enclosed, detection method: one, detecting locally ellipticity with iron sheet template, and finish position with slate pencil；Two, it is surveyed with box ruler
The circularity of graduated cylinder body is measured on the basis of a quarter of cylinder perimeter or 1/8th pipeline sections, measured size is write
On steel pipe；Three, production and cylinder are each one with the inside and outside template of diameter, and template width 200mm or so, length is according to pipe diameter size
It determines, template is determined with longitudinal joint bevelled edge gap by caliber, the relationship of template and longitudinal joint bevelled edge gap and caliber: works as pipe
When diameter is 400mm 700mm, gap is 02 mm；When caliber is 700 1000 mm of mm, gap is 13 mm；When
When 1000 mm or more of caliber, gap is 2 4mm.
Tenth step corrects Hui Yuan: it is round re-compacted until full not reach should adjusting back for requirement for ovality after welding
Until foot requires.
Two, shell ring spreading:
After the completion of shell ring part, using grouping machine and the piecewise spreading shell ring of turning rolls, when docking, pays attention to locating for longitudinal joint
Angle position rushes a little with reference to ocean, and automatic welding assembles after spot welding positioning, since rack gear is closing up seam position space width build-up tolerance only
For ± 1.5mm, it is contemplated that the welding of shell ring circumferential weld is shunk, and shell ring spot welding needs to detect cylinder height when positioning, after cylinder spreading
Height tolerance require control between -1 ~+2mm.
Three, structure is crossed:
After shell ring spreading, annular reinforcement and platform structure line, while reinforcing rib FB60 × 300 and tooth are up marked from bottom
The installation site of batten should cross simultaneously, the two lines just inspection declaration after the completion of barrel front and back sides, structure scribing line.
Four, Standard:
According to scribing position assembling structure, vertical stiffeners, T-type stiffening ring, the φ 219.1 of FB60 × 300 are successively installed
× 8.18 structural tube prevents the reinforcing rib of FB60 × 300 from dislocation and welding deformation occurring in installation and welding process.
Five, rack-plate welding equipment:
Spud leg goes to certain position right angle setting on turning rolls when rack-plate is installed, when installation needs to guarantee rack-plate
Vertical stiffeners with FB60 × 300 in cylinder are to just, and after rack-plate assembly, reinforcing tooling is fixed, with control
Rack gear deforms in the welding process, after the completion of rack-plate welding, detects and cut upper sleeve surplus again, when rack-plate spreading
It is ± 1.0mm when space width tolerance level of the rack-plate to interface is assembled, is ± 1.5mm, tooth when vertically closing up assembly
Spacing tolerance between batten common normal controls within ± 3.0mm, as shown in Figure 1.
When using manual electric arc welding when rack-plate welds, symmetrical welding is carried out simultaneously to two weld seams by eight welders, is adopted
When with Lincoln weld, symmetrical welding is carried out to two weld seams by overturning, size monitoring is uninterruptedly carried out in welding process, protects
Card welding is heated evenly, and appearance of weld is beautiful, guarantees integral solder quality.
Six, structure inspection declaration:
It checks the straightness of cylinder, checks rack-plate straightness, flatness, common normal spacing.
Seven, interior attachment installation:
Terminate that the contents structure such as internal duct, outfititem is simultaneously installed after the assay was approved in single spud leg sectional making,
Installation dimension is paid attention in interior attachment installation process.
Eight, water gauge is installed:
The internal-external accessory of spelter, water gauge mark is installed.
Nine, sandblasting is transported:
Enough transhipment supporting points are positioned, to prevent transport and sandblasting procedures from leading to cylinder, rack-plate deformation.
During progress above-mentioned steps are processed, it should be noted that:
1. the beginning of various processes must carry out after previous process measures passed examination and checks and accepts；To have when welding certain
Fixation and welding sequence；Interim suspension centre should cut away in time after and polish, anti-corrosion；Spud leg build technology emphasis and
Difficult point is exactly the control of pile leg structure construction precision and rack welding.To in spud leg building course precision controlling and welding procedure
Stringent quality control must be carried out.
2. all detecting instruments should all have the quality certification；Detailed Discrepancy Report should be provided after measurement every time；At least every
One-shot measurement is carried out before secondary assembling and after assembling, carries out one-shot measurement after welding again, to guarantee that the measurement error satisfaction of postwelding is wanted
It asks.
3. the misalignment of butt weld requires
Schematic diagram as shown in Figure 2 is it is found that standard are as follows: for special component and main member a≤0.15t, limiting value are as follows:
a=3.0mm。
4. the aligning requirements of fillet weld
Schematic diagram as shown in Figure 3 is it is found that standard are as follows: it is required that measuring in the neutral line of plate, if a≤t1/3 if a
≤ (5t-3t2)/6 is measured, limiting value are as follows: a=3.0mm in the root of plate, it should be noted that when t3 is less than t1,
T1 should be replaced with t3 in standard of tolerance.
5. the aligning requirements of rack gear seat board and spud leg outside plate fillet weld
Schematic diagram as shown in Figure 4 is it is found that standard are as follows: it is required that a≤t1/3, measures, the limit in the neutral line of plate
Value are as follows: a=3.0mm.
6. stringers, inner supporting structure panel aligning requirements
Schematic diagram as shown in Figure 5 is it is found that standard are as follows: it is required that a≤0.04b, limiting value are as follows: a=4.0mm.
7. stringers, inner supporting structure short transverse aligning requirements
Schematic diagram as shown in FIG. 6 is it is found that standard are as follows: it is required that a≤0.15t, limiting value are as follows: a=3.0mm.
It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, above-described embodiment and explanation
It is merely illustrated the principles of the invention described in book, without departing from the spirit and scope of the present invention, the present invention also has
Various changes and modifications, these changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention
It is defined by the appending claims and its equivalent thereof.
Claims (6)
1. a kind of from liter self-propulsion type platform leg building technology, it is characterised in that: including shell ring part manufacturing, shell ring spreading, knot
Structure scribing line, Standard, rack-plate welding equipment, structure inspection declaration, the installation of interior attachment, water gauge installation, transhipment sandblasting process；Step is specific
Are as follows:
A) shell ring part manufacturing: including CNC cutting, scribing line, bevelling, roll bent plate, check ovality, weldering prelocalization,
Longitudinal seam welding, Welding Testing, ovality are examined, correct return sired results sequence；
B) shell ring spreading: utilizing grouping machine and the piecewise spreading shell ring of turning rolls, and when docking pays attention to angle position locating for longitudinal joint, joins
It examines ocean to rush a little, automatic welding assembles after spot welding positioning, and shell ring spot welding needs to detect cylinder height, the height after cylinder spreading when positioning
Tolerance -1~+2mm；
C) structure is crossed: after shell ring spreading, annular is up marked from bottom and is reinforced and platform structure line, while reinforcing rib FB60 ×
300 should cross simultaneously with the installation site of rack-plate, the two lines just inspection declaration after the completion of barrel front and back sides, structure scribing line；
D) Standard: according to scribing position assembling structure, successively install the vertical stiffeners of FB60 × 300, T-type stiffening ring,
219.1 × 8.18 structural tube prevents the reinforcing rib of FB60 × 300 from dislocation and welding deformation occurring in installation and welding process；
Spud leg: being gone to certain position right angle setting when installation rack-plate by e) rack-plate welding equipment on turning rolls, and when installation needs
Guarantee the vertical stiffeners of FB60 × 300 in rack-plate and cylinder to just, after rack-plate assembly, reinforcing tooling is consolidated
It is fixed, it is deformed in the welding process with controlling rack gear, after the completion of rack-plate welding, detects again and cut upper sleeve surplus, tooth
It is ± 1.0mm when space width tolerance level of the rack-plate to interface is assembled when batten spreading, is when vertically closing up assembly
± 1.5mm, the spacing tolerance between rack-plate common normal are controlled in ± 3.0mm；
F) structure inspection declaration: checking the straightness of cylinder, checks rack-plate straightness, flatness, common normal spacing；
G) attachment is installed in: terminating simultaneously to install the inside such as internal duct, outfititem after the assay was approved in single spud leg sectional making
Accessory structure pays attention to installation dimension in interior attachment installation process；
H) water gauge is installed: the internal-external accessory of installation spelter, water gauge mark；
I) it transports sandblasting: positioning enough transhipment supporting points, to prevent transport and sandblasting procedures from leading to cylinder, rack-plate deformation.
2. according to claim 1 from liter self-propulsion type platform leg building technology, it is characterised in that: in the step a, cylinder
The step of saving part manufacturing specifically:
1) CNC cutting: pressing CNC cutting figure cutting stock, and part size is checked after blanking, indicates plate thickness, material, part on part
Number, groove, slope type, machining information, wherein machining information be bending radius, roll direction, for there is the jacking figure of clout,
Clout is numbered, is tracked and is utilized with convenient material；
2) cross: marking equal part with corresponding data by drawing and examine line and four buses, i.e., 0 ° of cylinder, 90 °, 180 °,
270 ° of lines, and stamp foreign punch mark；
3) bevelling: by jacking figure requirement bevel, groove direction is distinguished with working as front and non-present face；
4) it rolls bent plate: plate being rolled into cylinder using veneer reeling machine, plate longitudinal joint position does not place surplus, uses in coiling process
Iron sheet template checks the circularity of cylinder, and longitudinal joint gap guarantees that, in 2~3mm, docking dislocation is no more than the ten of plate thickness after the completion of rolling
/ mono- or 3.2mm, the two are minimized, and cylinder both ends mistake skin is no more than 1.5mm；
5) check ovality: ovality when rolling requires control within 8.0mm, and cylinder external diameter allowance control is in+2.0-
6.0mm should be corrected when being unable to satisfy；
6) weld prelocalization: cylinder rolls, is located on veneer reeling machine and disposably completes, and plate is not more than 2mm, plate stitch two to wrong plate
End is used the steel plate of at least 100mm long same material condition of equivalent thickness as arc-extinguishing plate is drawn and is fixed, the middle section same material for having welding hole
Matter horse plate is fixed, and horse plate length is 10 times of mother metal thickness；
7) longitudinal seam welding: being welded using longitudinal joint of the Lincoln weld to the cylinder after rolling, and welding material selects WPS regulation
Wlding first cleans out welding bead before welding, and first welds to cylinder inside, then dig back chipping, capping to carbon on the outside of cylinder；
8) Welding Testing: being delivered for a check after welding, including Welding Testing and dimension control, and weld seam spy is carried out after 48 hours
Wound；
9) ovality is examined: after the completion of longitudinal seam welding of barrel, ovality must detect again, and especially welding around the cylinder is outer
Portion；
10) correct Hui Yuan: for welding after ovality do not reach requirement should adjust back justify it is re-compacted until meet the requirements for
Only.
3. according to claim 2 from liter self-propulsion type platform leg building technology, it is characterised in that: ellipse in the step 9
The detection method of circularity are as follows: one, with iron sheet template detect locally ellipticity, and position is finished with slate pencil；Two, cylinder is measured with box ruler
Circularity, measured on the basis of a quarter of cylinder perimeter or 1/8th pipeline sections, measured size write on steel pipe
On；Three, production and cylinder are each one with the inside and outside template of diameter, and template width 200mm or so, length is determined according to pipe diameter size,
Template is determined with longitudinal joint bevelled edge gap by caliber.
4. according to claim 2 from liter self-propulsion type platform leg building technology, it is characterised in that: in the step 9, sample
The relationship of plate and longitudinal joint bevelled edge gap and caliber: when caliber is 400mm~700mm, gap is 0~2mm；When caliber is
When 700mm~1000mm, gap is 1~3mm；As caliber 1000mm or more, gap is 2~4mm.
5. according to claim 2 from liter self-propulsion type platform leg building technology, it is characterised in that: in the step 7,
It needing to be preheated before longitudinal seam welding, pre-heating mean is carried out using flame or electric heater, interlayer temperature should be controlled in welding process,
Postwelding should control cooling velocity.
6. according to claim 1 from liter self-propulsion type platform leg building technology, it is characterised in that: in the step e, tooth
When using manual electric arc welding when batten welds, symmetrical welding is carried out simultaneously to two weld seams by eight welders, it is automatic using submerged arc
When weldering, symmetrical welding is carried out to two weld seams by overturning, uninterruptedly carries out size monitoring in welding process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711135067.6A CN107825077B (en) | 2017-11-16 | 2017-11-16 | It is a kind of to rise self-propulsion type platform leg building technology certainly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711135067.6A CN107825077B (en) | 2017-11-16 | 2017-11-16 | It is a kind of to rise self-propulsion type platform leg building technology certainly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107825077A CN107825077A (en) | 2018-03-23 |
| CN107825077B true CN107825077B (en) | 2019-07-19 |
Family
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| CN109604980B (en) * | 2018-11-08 | 2020-11-27 | 武汉船用机械有限责任公司 | Manufacturing method of long cylindrical mold structural member |
| CN109648269B (en) * | 2019-01-02 | 2021-07-09 | 南通泰胜蓝岛海洋工程有限公司 | Construction process of lifting leg pile of marine life platform |
| CN109590744B (en) * | 2019-01-18 | 2019-11-01 | 中交第三航务工程局有限公司 | A kind of welding procedure of offshore wind power foundation steel-pipe pile |
| CN112570851B (en) * | 2020-12-08 | 2022-07-29 | 上海振华重工启东海洋工程股份有限公司 | Pile leg rack installation method |
| CN113417268B (en) * | 2021-05-31 | 2022-07-26 | 武汉船用机械有限责任公司 | Lifting system of ocean platform |
| CN116810754B (en) * | 2023-08-29 | 2023-12-22 | 南通中远海运川崎船舶工程有限公司 | Technological method for improving line drawing precision of reverse surface material |
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