CN105234575B - Manufacturing method for self-elevating type offshore platform cylindrical pile leg - Google Patents

Manufacturing method for self-elevating type offshore platform cylindrical pile leg Download PDF

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Publication number
CN105234575B
CN105234575B CN201510796018.1A CN201510796018A CN105234575B CN 105234575 B CN105234575 B CN 105234575B CN 201510796018 A CN201510796018 A CN 201510796018A CN 105234575 B CN105234575 B CN 105234575B
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China
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cylinder
tooth bar
segmentation
welding
spreading
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CN201510796018.1A
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Chinese (zh)
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CN105234575A (en
Inventor
杨少波
丁天波
袁俊磊
李铁鹏
易红军
胡俊祥
刘威
丁宏民
王强强
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青岛海西重机有限责任公司
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Publication of CN105234575A publication Critical patent/CN105234575A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding

Abstract

The invention discloses a manufacturing method for a self-elevating type offshore platform cylindrical pile leg. The manufacturing method for the self-elevating type offshore platform cylindrical pile leg comprises the following steps of manufacturing and spreading of a cylinder in sections, manufacturing and spreading of a rack in sections, assembling and welding of the spread rack section and the sectional cylinder and folding of the pile leg. Manufacturing of the pile leg can be completed within the limited period through the method, and the welding quality and welding precision both meet the requirements of working conditions.

Description

A kind of manufacture method of jack up maritime platform cylindrical leg

Technical field

The invention belongs to maritime platform manufacturing technology field, more particularly to a kind of jack up maritime platform cylindrical leg Manufacture method.

Background technology

Jack up maritime platform is mainly used in coordinating drilling platform well drilling, oil field to produce service, offshore oilfield construction, oil field Volume increase, workover treatment, life support, wind-powered electricity generation installation etc..By taking self-elevating drilling platform as an example, drilling machinery is mounted with thereon, is moved The some liftable spud legs of power, equipment, accommodation one-level, during drilling well, bottom in the shoe of spud leg bottom, and platform is then along spud leg liter Face certain altitude off sea;During displacement, platform is down to the water surface, and spud leg is risen, and platform can be dragged it new just as barge by tugboat Well location.It can be seen that, spud leg is the key position of jack up maritime platform, when jack up maritime platform implement operation when, it is necessary to By elevating mechanism by platform raising to sea above safe altitude, the pitching pile of spud leg is then carried out, and support whole by shoe Individual platform.

At present, the primary structure form of jack up maritime platform cylindrical leg is the additional both sides tooth of cylinder of cylinder Bar, jacking system is the key that whole jack-up unit can be lifted smoothly, spud leg as jacking system primary structure, no matter It is the welding quality or its precision controlling of spud leg, is all particularly important.

During using prior art manufacture spud leg, there is problems with:(1), it is difficult to ensure that the weldering of tooth bar high-strength steel Connect demand;(2), spud leg length is long, and dimensional measurement, control difficulty are big, spud leg is difficult to ensure that when making construction and encloses single inside trap The construction demand in the side only gap of 6mm;(3), tooth bar is engaged with the gear enclosed in trap gear-box, and the spud leg after the completion of welding is to tooth The requirement of bar precision is high, and the cylinder of spud leg is unlikely to be a regular cylinder for theory in the fabrication process, existing Technology is difficult to ensure that the precision after the assembling and welding of tooth bar;(4), the cylindrical spud leg of existing jack up maritime platform Typically there is 70m~90m long, be limited to place and crane gear, the fabrication cycle of spud leg is long, and precision is difficult to ensure that.

As can be seen here, prior art awaits further improving.

The content of the invention

The present invention is the weak point for avoiding above-mentioned prior art from existing, there is provided it is a kind of can be complete within the limited duration Into the manufacture of spud leg, and the welding quality of spud leg and welding precision is set to reach the jack up maritime platform cylinder of regulation requirement The manufacture method of spud leg.

The technical solution adopted in the present invention is:

A kind of manufacture method of jack up maritime platform cylindrical leg, comprises the following steps:

Step 1, the group pair and sectional making of cylinder:On the premise of cylinder ovality is ensured, by cylinder edge rolling and assemble Weld its internal structure;Group's group pair of cylinder is carried out in units of three section cylinders again, is saved to multigroup three after the completion of group's group pair The big group of spreading that cylinder is segmented, obtains being segmented cylinder;

Step 2, the spreading of tooth bar:Sectional making is carried out to tooth bar, before tooth bar sectional making, is first intercepted from tooth bar many The section embedding benefit section of tooth bar, after the completion of sectional making, welding spreading is carried out to each segmentation tooth bar on moulding bed, obtains multigroup spreading tooth bar Section, the length of each spreading rack segments is suitable with the length of above-mentioned segmentation cylinder;

Step 3, spreading rack segments and the segmentation welding equipment for being segmented cylinder:One section of spreading rack segments is chosen as tooth bar benchmark Section, by the tooth bar benchmark section with it is corresponding segmentation cylinder welded, after the completion of welding be welded tooth bar benchmark section and point Two spreading rack segments and the embedding benefit section of tooth bar adjacent thereto is pre-installed on the basis of section cylinder, the embedding section of mending of tooth bar is located at adjacent two Between spreading rack segments, segmentation cylinder corresponding with spreading rack segments is welded after the completion of prepackage, by that analogy, connected with the preceding paragraph Spreading rack segments and segmentation cylinder on the basis of section, the spreading rack segments and the embedding benefit section of tooth bar of next segmentation are pre-installed, until will All of spreading rack segments are completed with segmentation barrel soldering;

Step 4, spud leg is shortlisted for trap:Spreading rack segments obtain spud leg after the completion of closing up with segmentation cylinder spreading, and spud leg is inserted It is shortlisted for trap.

In the step 1, extensible extent can be produced during being processed to cylinder edge rolling, to avoid side coiled round edge mowing cylinder The situation of body occurs, and in the cylinder blanking of early stage, 9~11mm of the extensible extent blankings that need to subtract cylinder edge rolling stay pre- in place, not Curved segment.

In the step 2, that the welding between segmentation tooth bar and segmentation tooth bar is selected is U.S. Lincoln welding rod CONARC85.

In the step 3, what the welding between spreading rack segments and segmentation cylinder was selected is CHE58-1 welding rod bottoming, GFL-71Ni carbon dioxide property of medicine welding wire cappings.

In the step 2, in the welding process of segmentation tooth bar, the tooth pitch of each segmentation tooth bar need to be controlled, tooth pitch Control can be realized by following methods:On the opportunity commented using weldering, segmentation tooth is directly calculated by the test plate (panel) of soldering test Bar welding when, the amount of contraction of postwelding, thereby determine that weldering nipper away from, it becomes possible to ensure the tooth pitch of postwelding in theoretical circular pitch deviation model In enclosing.

In the step 3, when spreading rack segments are carried out with the welding equipment for being segmented cylinder, need to be by tooth bar positioning tool, should Tooth bar positioning tool includes that along the uniform code plate of spreading rack segments length direction each code plate is in gate, is pressed from both sides between adjacent code plate Tooth bar heating tape is provided with, welding hole was offered on each code plate.

The tooth bar positioning tool also includes the voussoir group for limiting the movement of spreading rack segments, the quantity and code of voussoir group The quantity of plate is equal, and each voussoir group includes the voussoir of polylith limitation rack segments movement, and one end of each voussoir is connected with code plate, separately One end abuts against with rack segments.

In the step 3, before welding equipment of the spreading rack segments with segmentation cylinder is carried out, need to be in spreading rack segments and segmentation Backing plate is set up between cylinder, and deposited metal must not be with pad contact during welding.

In the step 1, the material of cylinder is EH36 steel;In the step 2, the material of tooth bar is A514GRQ steel.

In the step 2 and step 3, before segmentation welding is carried out to cylinder and welding spreading is being carried out to tooth bar Before, weld preheating need to be carried out to EH36 steel, A514GRQ steel, preheating temperature is 150~170 DEG C;In the step 2 and step 3, After the completion of welding, rear heat need to be carried out to the spreading rack segments and segmentation cylinder that are welded, 230 DEG C of postheat temperature is incubated 2~3 hours Temperature is down to 50 DEG C afterwards, afterwards after the completion of heat, spreading rack segments and segmentation cylinder is put into natural cooling in atmosphere.

By adopting the above-described technical solution, having the beneficial effect that acquired by the present invention:

1st, constructed while several segmentations of same pile leg can be realized using the present invention, first ready-made following spud leg Can first carry out with shoe, enclose trap general assembly close up and it is land lifting experiment etc., greatly save the duration, ensured that project is entered Degree.

2nd, tooth bar is mended section and is welded in welding because of, every section of about 30~40mm of elongation larger by thermal expansion length using embedding Preceding prepackage, efficiently avoid the problem inconsistent with barrel soldering amount of contraction that tooth bar elongated is come, and efficiently avoid should Power is concentrated.

3rd, cross-operation simultaneously between each operation can be made using the present invention, the manufacturing cycle of spud leg is substantially reduced, and The technical problem in cylindrical leg manufacturing process is solved, the welding quality and precision in manufacturing process become controllable and have Effect is jack up maritime platform can safely, smoothly and accurately be run during lifting experiment and follow-up use it is strong Ensure.

Brief description of the drawings

Fig. 1 is the schematic diagram of middle rack positioning tool of the present invention.

Fig. 2 is the welding equipment schematic diagram of middle rack of the present invention and cylinder.

Fig. 3 is the schematic diagram for ensureing spud leg radius in the present invention using micrometer instrument.

Fig. 4 is the schematic diagram that segment folding spud leg is carried out using the present invention.

Wherein,

1st, cylinder 1.1, first segmentation cylinder 1.2, second segmentation cylinder the 1.3, the 3rd segmentation cylinder 1.4, the 4th point Section cylinder 2, tooth bar 2.1, the first rack segments 2.2, the second rack segments 2.3, the 3rd rack segments 2.4, the 4th rack segments 3, The embedding benefit section of voussoir 4, code plate 5, backing plate 6, tooth bar

Specific embodiment

The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings, but the present invention is not limited to These embodiments.

As shown in Figures 1 to 4, a kind of manufacture method of jack up maritime platform cylindrical leg, comprises the following steps:

Step 1, the group pair and sectional making of cylinder:On the premise of cylinder ovality is ensured, by cylinder edge rolling and assemble Weld its internal structure;Group's group pair of cylinder is carried out in units of three section cylinders again, is saved to multigroup three after the completion of group's group pair The big group of spreading that cylinder is segmented, obtains being segmented cylinder;

Step 2, the spreading of tooth bar:It is limited to the making ability and transport capacity of producer's tooth bar, the tooth bar of purchase is often only There are seven or eight meters long, therefore sectional making need to be carried out to tooth bar, before tooth bar sectional making, multistage tooth bar is first intercepted from tooth bar embedding Section is mended, after the completion of sectional making, welding spreading is carried out on moulding bed to each segmentation tooth bar, obtain multigroup spreading rack segments, respectively connect The length of rack segments long is suitable with the length of above-mentioned segmentation cylinder;

Step 3, spreading rack segments and the segmentation welding equipment for being segmented cylinder:One section is chosen from spreading rack segments as tooth bar base Quasi- section, as shown in figure 4, by the second rack segments 2.2 be elected to be tooth bar benchmark section, by second rack segments 2.2 with corresponding second point Section cylinder 1.2 is welded, pre- on the basis of the second rack segments 2.2 being welded and the second segmentation cylinder 1.2 after the completion of welding The the first segmentation cylinder 1.1 and rack segments the 2.1, the 3rd segmentation cylinder 1.3 and rack segments 2.3 for pretending adjacent, before welding, need to be second The embedding tooth bar and cylinder mended section 6, the two segmentations are welded again after the completion of prepackage of tooth bar, weldering are pre-installed respectively in the two ends of rack segments 2.2 When connecing, four people welding simultaneously is needed, to ensure the synchronization of tooth bar and not lateral bending;After the completion of welding, then with the 3rd rack segments 2.3 and In both rack segments 2.4 of right side prepackage the 4th and the 4th segmentation cylinder 1.4 on the basis of three segmentation cylinders 1.3, so sequentially enter OK, until all of rack segments are completed with segmentation barrel soldering;

Step 4, spud leg insertion is docked after enclosing trap with shoe, and after the completion of docking, the spreading being segmented to spud leg closes up.By In prepackage process before, the data after spud leg folding can reach requirement.

Spud leg quality control is it is important that the quality of quality and tooth bar and the spud leg angle welding of control tooth bar docking.Tooth bar 2 material is that A514GRQ, thickness are 114mm, and the yield strength of the material is more than 720Mpa, is a kind of high intensity quenching add-back Fiery quenched and tempered steel, because steel grade adds the alloying elements such as Mn, Cr, Mo, easily cold crack is produced during welding, and heat affected area is heated The influence of temperature and cooling velocity easily forms zone of transformation and friable tissues, and cylinder 1 is EH36 steel, material thickness 40-52mm.

In the step 2 and step 3, connect before segmentation welding is carried out to cylinder 1 and welding is carried out to tooth bar 2 Before length, weld preheating need to be carried out to EH36 steel, A514GRQ steel, preheating temperature is 150~170 DEG C, by weld preheating reduction Cooling velocity in A514GRQ, EH36 steel during martensite transfor mation, while act on improving A514GRQ by the self tempering of martensite Crack resistance;Because adding the alloying elements such as Mn, Cr, Mo in this high intensity quenching add-back thermal transfer steel of A514GRQ, during welding Cold crack is easily produced, heat affected area is influenceed easily to form zone of transformation and friable tissues by heating-up temperature and cooling velocity, because This preheating temperature is unsuitable too high, otherwise not only unfavorable to preventing crackle, can more make 800~500 DEG C of cooling velocity less than appearance The critical cooling rate of fragility mixture tissue, substantially reduces the toughness of welding heat affected zone, it is therefore preferable that preheating temperature is 150 DEG C, 160 DEG C or 170 DEG C;

The selection of welding material:Hydrogen in addition to iron rust, greasy dirt at the moisture of welding material, welding groove, Also from the hydrogen content of welding material, the welding of super-high strength steel needs to use hydrogen content, is tested by multiple welding, from such as Under welding material:AWS A5.5 E12018-G-H4R are selected in welding between segmentation tooth bar and segmentation tooth bar;Spreading rack segments AWS A5.1 A7018-1 welding rod bottoming is selected with the welding between segmentation cylinder, from AWS A5.20 E71T-1C-J welding wires Capping;Preferably, that the welding selection being segmented between tooth bar and segmentation tooth bar is U.S. Lincoln welding rod CONARC85;Spreading tooth What the welding between bar section and segmentation cylinder was selected is CHE58-1 welding rod bottoming, GFL-71Ni carbon dioxide property of medicine welding wire cappings;

The control of interlayer temperature:Length and lifting capacity according to required spud leg are docked rack segments long, segmentation cylinder and are entered respectively Row segmentation welding, and in order to ensure ballistic work more than 47J, welding method during welding from small heat input dock rack segments long and Segmentation cylinder is welded respectively, welding heat affected zone and weld metal is had preferable toughness, can be with Reduce welding deformation;During welding, interlayer temperature, interlayer temperature need to be strictly controlled to play the effect same with preheating, minimum layer Between temperature be 75 DEG C, maximum interlayer temperature is 200 DEG C;

Heat after postwelding:This kind of firm alloy elements of A514GRQ are quenched by adding various raisings on the basis of low-carbon (LC) The alloying element of permeability is to ensure to obtain that intensity is high, the line and staff control of good toughness low-carbon martensite and part bainite, therefore, Cooling velocity can not be too fast, need to be after the completion of welding, and spreading rack segments and segmentation cylinder to being welded are warm after carrying out, by anti- Thermal parameter, i.e. 230 DEG C of postheat temperature and temperature is down to 50 DEG C after being incubated 2~3 hours after multiple verification experimental verification, afterwards after the completion of heat, general Rack segments and segmentation cylinder put natural cooling in atmosphere, and the purpose of do so is conducive to the effusion of hydrogen, prevents cold crack.

In the step 1, certain extensible extent can be produced during edge rolling processing is carried out to cylinder 1, to avoid side The situation of coiled round edge mowing cylinder 1 occurs, and in 1 blanking of cylinder of early stage, need to subtract the 9~11mm of extensible extent of the edge rolling of cylinder 1 Pre- curved segment is stayed in blanking in place, not.

In the step 1, the theoretical diameter of spud leg is 3300mm, but during construction, it is impossible to reach theoretical circularity and straight Footpath, it is impossible to make a cylinder for standard, in order to ensure after completion spud leg and enclose the unilateral gap of 6mm between trap, in advance The diameter tolerance after spud leg edge rolling is formulated in 3298 ± 1mm, to avoid spud leg with diameter greater than theoretical value.During to ensure that pitching pile closes up Spud leg and the gap for enclosing trap, it is ensured that close up and lift being smoothed out for experiment, need the diameter of precise control spud leg.As shown in figure 3, Adjust the center of circle O of the upper and lower mouth of cylinder 11、O2, it is ensured that O1、O2In same level, with micrometer instrument in the upper of cylinder 1 A horizontal plane A is made a call in side or lower section, vertical distance L1s of the external diameter R1 and measurement point at measurement barrel tip away from horizontal plane A, can Know the Rn+Ln=R1+L1 of optional position on other vertical sections, the external diameter Rn=of arbitrfary point on the vertical section can be released R1+L1-Ln, the radius of spud leg can control value as one;Control cylinder 1 on install tooth bar 2 two positions, and with cylinder 1 The sectional construction of the radius of two ends end face and the linearity in the two ends end face center of circle, the measurement of radius and control through whole spud leg And during closing up.

The lifting performance of maritime platform depends primarily on transmission accuracy, and transmission accuracy is mainly by enclosing trap middle gear case again The precision of installation accuracy and spud leg tooth bar ensures.The precision controlling of tooth bar 2, difficult point is the method with welding, makes postwelding Tooth bar 2 in 70~90 meters of length ranges reaches mach effect.The precision controlling of tooth bar 2 is essentially consisted in:The control of tooth pitch, tooth The limitation of the bar free degree and tooth top away from compensation.

The control of tooth pitch:In the step 2, during being segmented the welding spreading of tooth bar, need to be to the tooth of each segmentation tooth bar Away from being controlled, the control of tooth pitch can be realized by following methods:The opportunity commented using weldering, directly by the examination of soldering test Plate calculate tooth bar 2 welding when, the amount of contraction of postwelding, thereby determine that weldering nipper away from, it becomes possible to ensure that the tooth pitch of postwelding is resonable In the range of circular pitch deviation.

The control of tooth bar 2DOF:In the step 3, as shown in figure 1, carrying out spreading rack segments with segmentation cylinder During welding equipment, need to be by tooth bar positioning tool, the tooth bar positioning tool is included along the uniform code plate 4 of spreading rack segments length direction, Each code plate 4 is in gate, and tooth bar heating tape is folded between adjacent code plate 4, and welding hole was offered on each code plate 4;The tooth Bar positioning tool also includes the voussoir group for limiting the movement of spreading rack segments, and the quantity of voussoir group is equal with the quantity of code plate 4, Each voussoir group includes the voussoir 3 of polylith limitation rack segments movement, and one end of each voussoir 3 is connected with code plate 4, the other end and spreading Rack segments are abutted against.

Tooth top away from control:Because when making, actually spud leg external diameter everywhere can not possibly reach unified or standard value, one As when making, the fit clearance that the external diameter of cylinder 1 is less than drawing requirement size to ensure with enclose trap, if tooth bar 2 directly with Spud leg erection welding, is easily caused the tooth top of postwelding tooth bar 2 away from smaller, if tooth top can make tooth bar 2 and enclose away from less than required value Gap between gear in trap gear-box increases and causes danger, in order to compensate the loss of spud leg radius, as shown in Fig. 2 Spreading rack segments are carried out with before being segmented the welding equipment of cylinder, backing plate 5 need to be set up between spreading rack segments and segmentation cylinder, welded When deposited metal must not be contacted with backing plate 5 so that ensure the tooth top of the postwelding of tooth bar 2 away from.

The part do not addressed in the present invention uses or uses for reference prior art to be capable of achieving.

Additionally, term " first ", " second ", " the 3rd ", " the 4th " are only used for describing purpose, and it is not intended that indicate or Imply relative importance.

Specific embodiment described herein is only to spiritual example explanation of the invention.Belonging to of the invention Those skilled in the art can make various modifications or supplement to described specific embodiment or use what is be similar to Mode is substituted, but without departing from spirit of the invention or surmounts scope defined in appended claims.

Claims (10)

1. a kind of manufacture method of jack up maritime platform cylindrical leg, it is characterised in that comprise the following steps:
Step 1, the group pair and sectional making of cylinder:On the premise of cylinder ovality is ensured, by cylinder edge rolling and erection welding Its internal structure;Group's group pair of cylinder is carried out in units of three section cylinders again, to multigroup three section cylinders after the completion of group's group pair Big group of spreading being segmented, obtains being segmented cylinder;
Step 2, the spreading of tooth bar:Sectional making is carried out to tooth bar, before tooth bar sectional making, multistage tooth is first intercepted from tooth bar The embedding benefit section of bar, after the completion of sectional making, welding spreading is carried out to each segmentation tooth bar on moulding bed, obtains multigroup spreading rack segments, The length of each spreading rack segments is suitable with the length of above-mentioned segmentation cylinder;
Step 3, spreading rack segments and the segmentation welding equipment for being segmented cylinder:One section of spreading rack segments is chosen as tooth bar benchmark section, will Tooth bar benchmark section is welded with corresponding segmentation cylinder, tooth bar benchmark section and segmentation cylinder after the completion of welding to be welded On the basis of pre-install two spreading rack segments and the embedding benefit section of tooth bar adjacent thereto, the embedding section of mending of tooth bar is located at two adjacent spreading teeth Between bar section, segmentation cylinder corresponding with spreading rack segments, by that analogy, the spreading connected with the preceding paragraph are welded after the completion of prepackage Section on the basis of rack segments and segmentation cylinder, pre-installs the spreading rack segments and the embedding benefit section of tooth bar of next segmentation, until will be all of Spreading rack segments are completed with segmentation barrel soldering;
Step 4, spud leg is shortlisted for trap:Spreading rack segments obtain spud leg after the completion of closing up with segmentation cylinder spreading, and spud leg insertion is enclosed Trap.
2. a kind of manufacture method of jack up maritime platform cylindrical leg according to claim 1, it is characterised in that institute State in step 1, extensible extent can be produced during being processed to cylinder edge rolling, for the situation for avoiding side coiled round edge mowing cylinder is sent out Raw, in the cylinder blanking of early stage, pre- curved segment is stayed in 9~11mm of the extensible extent blankings that need to subtract cylinder edge rolling in place, not.
3. a kind of manufacture method of jack up maritime platform cylindrical leg according to claim 1, it is characterised in that institute State in step 2, that the welding between segmentation tooth bar and segmentation tooth bar is selected is U.S. Lincoln welding rod CONARC85.
4. a kind of manufacture method of jack up maritime platform cylindrical leg according to claim 1, it is characterised in that institute State in step 3, what the welding between spreading rack segments and segmentation cylinder was selected is CHE58-1 welding rod bottoming, GFL-71Ni dioxies Change carbon property of medicine welding wire capping.
5. a kind of manufacture method of jack up maritime platform cylindrical leg according to claim 1, it is characterised in that institute In stating step 2, in the welding process of segmentation tooth bar, the tooth pitch of each segmentation tooth bar need to be controlled, the control of tooth pitch can be with Realized by following methods:Using opportunity for commenting of weldering, segmentation tooth bar is directly calculated when welding by the test plate (panel) of soldering test, The amount of contraction of postwelding, thereby determine that weldering nipper away from, it becomes possible to ensure the tooth pitch of postwelding in the range of theoretical circular pitch deviation.
6. a kind of manufacture method of jack up maritime platform cylindrical leg according to claim 1, it is characterised in that institute In stating step 3, when the welding equipment of spreading rack segments and segmentation cylinder is carried out, need to be by tooth bar positioning tool, tooth bar positioning work Dress includes that along the uniform code plate of spreading rack segments length direction each code plate is in gate, is folded with tooth bar between adjacent code plate and adds The torrid zone, welding hole was offered on each code plate.
7. a kind of manufacture method of jack up maritime platform cylindrical leg according to claim 6, it is characterised in that institute Stating tooth bar positioning tool is also included for limiting the voussoir group that spreading rack segments are moved, the quantity of voussoir group and the quantity phase of code plate Include the voussoir of polylith limitation rack segments movement Deng, each voussoir group, one end of each voussoir is connected with code plate, the other end and tooth bar Section is abutted against.
8. a kind of manufacture method of jack up maritime platform cylindrical leg according to claim 1, it is characterised in that institute State in step 3, before welding equipment of the spreading rack segments with segmentation cylinder is carried out, need to increase between spreading rack segments and segmentation cylinder If backing plate, and deposited metal must not be with pad contact during welding.
9. a kind of manufacture method of jack up maritime platform cylindrical leg according to claim 1, it is characterised in that institute State in step 1, the material of cylinder is EH36 steel;In the step 2, the material of tooth bar is A514GRQ steel.
10. the manufacture method of a kind of jack up maritime platform cylindrical leg according to claim 9, it is characterised in that In the step 2 and step 3, before carrying out segmentation welding to cylinder and before welding spreading is carried out to tooth bar, it is right to need EH36 steel, A514GRQ steel carry out weld preheating, and preheating temperature is 150~170 DEG C;In the step 2 and step 3, welding is completed Afterwards, rear heat, temperature drop after the insulation 2~3 hours of 230 DEG C of postheat temperature need to be carried out to the spreading rack segments and segmentation cylinder that are welded To 50 DEG C, afterwards after the completion of heat, spreading rack segments and segmentation cylinder are put into natural cooling in atmosphere.
CN201510796018.1A 2015-11-18 2015-11-18 Manufacturing method for self-elevating type offshore platform cylindrical pile leg CN105234575B (en)

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CN108480873A (en) * 2018-06-01 2018-09-04 南通振华重型装备制造有限公司 A kind of folding method of jack up wind-powered electricity generation mounting platform spud leg epimere and spud leg hypomere
CN110480261A (en) * 2019-07-30 2019-11-22 南通振华重型装备制造有限公司 A kind of broken stone leveling ship spud leg building technology

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CN102416554B (en) * 2011-09-28 2013-07-24 南通润邦海洋工程装备有限公司 Technology for making pile legs of wind power installation ship
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