CN105292378A - Zero-allowance butt joint construction method for unit pipe frames of liquefied gas carriers - Google Patents
Zero-allowance butt joint construction method for unit pipe frames of liquefied gas carriers Download PDFInfo
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- CN105292378A CN105292378A CN201510653655.3A CN201510653655A CN105292378A CN 105292378 A CN105292378 A CN 105292378A CN 201510653655 A CN201510653655 A CN 201510653655A CN 105292378 A CN105292378 A CN 105292378A
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Abstract
The invention provides a zero-allowance butt joint construction method for unit pipe frames of liquefied gas carriers. The method comprises the steps of carrying out manufacturing preparation; sequentially carrying out paper drawing, site selecting and datum line marking; carrying out reverse manufacturing of the unit pipe frames; overturning the unit pipe frames; installing fitting-out parts; hoisting the unit pipe frames; shutting the unit pipe frames. After the unit pipe frames are located on the carriers, shutting connectors of the unit pipe frames are connected. According to the method, accuracy control is carried out in the design process and in the manufacturing process, and therefore hoisting, installing and shutting can be directly carried out after units are constructed. The tedious work o hoisting, on-site correcting and reinstalling of shutting pipes can be reduced. In the manufacturing process, accuracy control is carried out, and therefore the unit pipe frames can be hoisted in one step. By implementing the zero-allowance butt joint method, the installation period of a whole liquid cargo system is greatly shortened, the workload is greatly lowered, the construction environment is greatly improved, the labor efficiency is greatly improved, and the enterprise revenue is improved.
Description
Technical field
The present invention relates to liquefied gas carrier to build;
Particularly relate to the method for construction of a kind of liquefied gas carrier unit pipe support nothing left amount docking.
Background technology
The construction amount of present liquefied gas carrier gets more and more, in prior art, liquefied cargo system build process is divided into unit to build (pipe, support, cable tray etc. being made under ship the unit of several entirety), then integral hoisting is gone on board, and last unit docking gets up to form whole system.
As shown in Figure 1, in prior art, the every root pipe joint between two unit pipe supports 1 all needs reserved one section of existing school pipe 2, for the construction error of docking between on-the-spot adjustment unit.This construction technology, not only add attachment weld, and aboard ship construction space is limited, liquid goods stainless steel tube butt welding requires high (per pass weld seam all needs film making inspection), the pipe carrying of larger latus rectum existing school, lifting, fix etc. adds very large work capacity all virtually, has also spun out the construction time simultaneously.
Summary of the invention
All deficiencies of prior art in view of the above, the invention provides a kind of solution common process work capacity large, the method of construction of the liquefied gas carrier unit pipe support nothing left amount docking of the problems such as difficulty of construction is large, and greatly can shorten by the method the duration that unit closes up, reduce and close up weld seam quantity, greatly improve efficiency, increase the performance of enterprises.
For achieving the above object and other relevant objects, the invention provides the method for construction of a kind of liquefied gas carrier unit pipe support nothing left amount docking, form liquefied cargo system after all unit pipe support docking, described method of construction comprises the following steps:
Make prepare, carry out successively drawing establish paint, place election, Benchmark line, described datum line comprises line of centers, rib bit line and stud location point;
The anti-state manufacture of unit pipe support, preset level reference plane on place, described horizontal base plan makes plane framework, and upper plane framework has welded rear installation column;
Unit pipe support stands up, and after pipe support column has welded, closes all end openings, carries out unit pipe support and stand up, and has stood up rear according to platform upper pillar stand locating point location, has ensured that unit pipe support upper surface is positioned at same level;
Fittings is installed, and is located by each unit pipe support after unit pipe support stands up by the PS on ship, carries out iron Xi part, shipyard pipe holder is installed, liquefied cargo system pipe holder is installed after having located;
Unit pipe support lifts, and adopts framework lifting form to hang in ship each unit pipe support according to the order from stern to stem;
Unit pipe support closes up, and after all unit pipe supports are aboard ship had good positioning, what connect each unit pipe support closes up place's interface.
Preferably, unit pipe support marks apart from midship line after completing on the level attitude of unit pipe support.
Preferably, when installing column, every root post stays 50mm surplus.
Preferably, the smooth deviation of described horizontal base plan is ± 5mm to the maximum.
Preferably, stand up rear according to platform upper pillar stand locating point location, adopted channel-section steel or other shaped steel adjustment height in bottom, each column place, ensure that unit pipe support upper surface is positioned at same level.
Preferably, after the installation of iron Xi part, priming paint is made in overall polishing, then carry out the installation of shipyard pipe holder, liquefied cargo system pipe holder is installed, the outfield prepackage of carbon steel pipeline and corrosion-resistant steel pipeline.
Preferably, when flow container hangs in hull, topside tank and main deck are all closed, and deck liquid goods area equipment carries out the lifting of unit pipe support after locating.
Preferably, before the lifting of unit pipe support is gone on board, unit pipe support altitude location horizon is moved to apart from actual deck plane 1.5m height.
Preferably, before unit pipes is erected and hung on ship, preset corresponding column base pad aboard ship.
Preferably, during the location of pipe support upper level and levels of planarity, laser or bracing wire inspection are carried out to each horizontal surface of unit pipe support, each column is got a little, prescind each posts bottom surplus, again check that upper surface planeness is until two adjacent cells diff-Hs are no more than 5mm.
By above technical scheme, the control of precision is carried out in segmentation of the present invention in Design and manufacture process, ensures that unit is after construction terminates, and just can directly carry out lifting and installing closing up.Reduce the work that gathering pipe lifting, existing school, again installation etc. are loaded down with trivial details.Carry out a series of precision controlling in the fabrication process, ensure that the lifting of unit pipe support settles at one go.By the enforcement without surplus docking calculation, whole liquefied cargo system install cycle shortens greatly, work capacity greatly reduces, construction environment is improved greatly, improves efficiency, increase the performance of enterprises.
Accompanying drawing explanation
Fig. 1 is shown as the schematic diagram of unit pipe support docking in prior art;
Fig. 2 is shown as the schematic diagram of unit pipe support of the present invention docking.
Element numbers illustrates:
1 unit pipe support
2 existing school pipes
Detailed description of the invention
By particular specific embodiment, embodiments of the present invention are described below, person skilled in the art scholar the content disclosed by this specification sheets can understand other advantages of the present invention and effect easily.
Refer to Fig. 1 to Fig. 2.Notice, structure, ratio, size etc. that this specification sheets institute accompanying drawings illustrates, content all only in order to coordinate specification sheets to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of the present invention, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that the present invention can produce and the object that can reach, still all should drop on disclosed technology contents and obtain in the scope that can contain.Simultaneously, quote in this specification sheets as " on ", D score, "left", "right", " centre " and " one " etc. term, also only for ease of understanding of describing, and be not used to limit the enforceable scope of the present invention, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of the present invention.
The invention provides the method for construction of a kind of liquefied gas carrier unit pipe support nothing left amount docking, comprise the following steps:
1, drawing is established and is painted.
Go out diagram form: publish picture according to the method for construction of unit pipe support nothing left amount docking, simplified basic diagram as shown in Figure 2, need not reserve existing school pipe 2 at two unit pipe support places of closing up.
2, place election, and draw line of centers, rib bit line.
The platform that unit pipe support internal field makes should select smooth hard nonpitting place, makes main points as follows:
In strict accordance with platform pull-up line of centers, rib bit line that drawing makes in internal field, mark stud location point.Said reference line, bench mark remain to after pipe support goes on board always after going out.
Unit pipe support can be indicated apart from midship 2m, 4m, 6m after making and being basically completed on unit pipe support level attitude ... apart from midship line, be convenient to the installation of follow-up iron Xi part, pipe Xi part.
The assembled place of pipe support need be continuous print.In order to prevent distortion and precision controlling demand, require that all unit can come assembled location by its sequence of positions on real ship in principle.
3, the anti-state manufacture of unit pipe support.
Ensure welding quality for ease of welding, unit pipe support adopts and stands up making.Internal field platform compensates as horizontal base plan the height error of this platform.First plane framework on making on horizontal base plan, requires to select straight distortionless square steel tube.Upper plane framework has welded rear installation column, and every root post stays about 50mm surplus; Vertical after requiring column welding, between each column, available channel-section steel or angle steel are strengthened, and spot welding vertical columns makes it keep vertical.
Because liquid petroleum gas system piping centering requires higher, unit pipe support installs rear upper surface aboard ship must keep smooth level.When platform is pre-installed, should above plane be reference plane, after completion, require that this coplanar flat deviation is ± 5mm to the maximum.Consider the throwing gesture of hull manufacturing errors and main deck, the length of each column of unit pipe support all should put surplus.
Bench mark when unit pipe support is assembled is pipe support upper port plane, ship midship position.Draw when the assembling of unit pipe support starts and determine to need to draw by drawing to determine datum line.This datum line needs to remain to till pipe support lifting welding terminates always.
During the assembling of unit pipe support, avoid column segmentation as far as possible, namely ensure column integraty and effectively support upper frame plane.
4, unit pipe support stands up.
After unit pipe support column has welded, close all end openings, can carry out standing up operation.Because after unit pipe support disengaging platform, rigidity is less, to note when standing up ensureing that pipe support principal plane is without large deformation.Stand up rear according to platform upper pillar stand locating point location, adopted channel-section steel or other shaped steel adjustment height in bottom, each column place, ensured that unit pipe support upper surface is in same level.Fittings is installed.
5, unit pipe support iron Xi part and pipe Xi part are installed:
Liquid goods pipe support unit main manufacturing process before lifting is gone on board is: unit pipe support assembled → iron Xi part installs (comprising electric fittings) → overall polishing does before priming paint → shipyard pipe holder installations → liquefied cargo system pipe holder installations → equipment installs (after completing, equipment is protected) → carbon steel pipe installation (installing pipe outward from equipment) → stainless steel tube installation (installing pipe outward from equipment) → go on board and do finish paint → lifting → local route repair.
Unit pipe support assembled good after need pipe support to prepare to have good positioning to carry out fittings installation again by the PS on ship in outfield, must not by out of order for unit pipe support or how deposit.
Unit pipe support has been located and has been installed iron Xi part, shipyard pipe holder is installed, and carries out after overall sand surfing makees priming paint, can carrying out the outfield prepackage of liquefied cargo system pipe holder, carbon steel pipeline and corrosion-resistant steel pipeline.
The stainless steel tube support (that is: the support of all liquefied cargo system pipes) of liquefied cargo system, does not allow when cellular installation to burn to death, in case stress is concentrated.Simultaneously because blue gas piping is stainless steel tube substantially, have that caliber is large and tube wall is thinner, rigidity is strong, the easy feature such as damage, and require to adopt butt welding, therefore higher to the requirement of stainless steel tube platform prepackage, the fixing and protection of rigorous concentration stainless steel tube during prepackage; Arrange the storage area of stainless steel tube prepackage, storage area should paint or layer overlay rubber on the ground, avoids unlike material to mix.For carbon steel piping, as ballast line, fire-fighting piping, liquid goods sea water piping system, Water spray piping, dry powder piping, pressurized air piping etc., first need pre-install on pipe support, note unstressed between pipeline section and pipeline section concentrating, there is good installation environment when ensureing that corrosion-resistant steel piping was installed afterwards, stainless steel tube can not be damaged because of the stress of carbon steel pipe.Carry out stainless steel tube prepackage again after carbon steel pipe is pre-installed, avoid constructing simultaneously.
Stainless steel tube must in strict accordance with the installation of drawing position, ensure unstressed between pipeline section and pipeline section, strictly according to location, drawing position something that gives the game away, note the something that gives the game away adopting correct model, can be temporary fixed (before pipe support centering in internal field stage suggestion something that gives the game away, the spot welding of all liquefied cargo system pipe something that gives the game aways is fixed, full weld again after to be centred).For the butt tube pre-installed after going on board between region, can on-the-spot adjustment pipeline section.Forbid when stainless steel tube is installed to adopt the pulling tool such as cucurbit to ensure centering, namely need ensure during tube butt welding to process state of nature.
6, unit pipe support lifting;
When flow container hangs in hull, topside tank and main deck are all closed, and liquid goods area territory, deck major equipment, after Primary Location, can carry out the lifting of unit pipe support.The lifting of unit pipe support should according to the order from stern to stem.Because unit pipe support prepackage piping is more, after disengaging platform, rigidity is less.Must consider the method for lifting before lifting according to the weight of unit pipe support and size, each unit pipes post setting strengthened by internal field shaped steel.Preferably adopt framework to lift form during lifting, utilize crossbeam to strengthen, ensure that unit pipe support principal plane is without distortion.Crossbeam fastens with nylon rope or the rope made of hemp with between unit pipe support, avoids the relative motion between unit pipe support and crossbeam.
Need to check according to drawing the web position taken on board in advance before the lifting of unit pipe support.Web location permissible variation 3mm.For ensure go on board after pipe support registration, cross position line can be finished on web.
Before pipe support is gone on board, in order to cut the convenience of surplus, unit pipe support altitude location size (horizon) must be moved to apart from actual deck plane 1.5m height.This size need move down from the position level line on pipe support top, upwards must not get below pipe support, the good size of lifting pre-test, and after cutting, lifting welding ensures tolerance.
Before unit pipes is erected and hung on ship, unit pipe support column base pad must according to drawing position locating plate aboard ship.Pipe support preferably carries out the mark work of ship midship line, rib bit line on main deck before going on board, rib bit line can mark one every one grade or two grades.
Unit pipes is erected and is hung on ship time, and column footing, according to main deck upper padding plate location, ensures column footing center and backing plate center one_to_one corresponding.After locating between unit pipe support and pad, deviation control is within 10mm.The location of unit pipe support upper level and levels of planarity, suggestion adopts to be carried out according to laser or stringing method, on building berth, scale is utilized to mark fundamental point (more than main deck base plane) at bow and deckhouse area according to the baseline of ship, then laser or bracing wire inspection plane are carried out to each horizontal surface of pipe support, each column is got a little, prescind each posts bottom surplus, again check upper surface planeness, pipe support column footing is welded on the backing plate welded in advance.Two adjacent cells diff-Hs are no more than 5mm.
7, unit closes up.
After all pipe supports are aboard ship had good positioning, linkage unit closes up place's interface
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (10)
1. a method of construction for liquefied gas carrier unit pipe support nothing left amount docking, form liquefied cargo system after all unit pipe support docking, it is characterized in that, described method of construction comprises the following steps:
Make prepare, carry out successively drawing establish paint, place election, Benchmark line, described datum line comprises line of centers, rib bit line and stud location point;
The anti-state manufacture of unit pipe support, preset level reference plane on place, described horizontal base plan makes plane framework, and upper plane framework has welded rear installation column;
Unit pipe support stands up, and after pipe support column has welded, closes all end openings, carries out unit pipe support and stand up, and has stood up rear according to platform upper pillar stand locating point location, has ensured that unit pipe support upper surface is positioned at same level;
Fittings is installed, and is located by each unit pipe support after unit pipe support stands up by the PS on ship, carries out iron Xi part, shipyard pipe holder is installed, liquefied cargo system pipe holder is installed after having located;
Unit pipe support lifts, and adopts framework lifting form to hang in ship each unit pipe support according to the order from stern to stem;
Unit pipe support closes up, and after all unit pipe supports are aboard ship had good positioning, what connect each unit pipe support closes up place's interface.
2. the method for construction of liquefied gas carrier unit pipe support nothing left amount docking according to claim 1, is characterized in that, mark apart from midship line after unit pipe support completes on the level attitude of unit pipe support.
3. the method for construction of liquefied gas carrier unit pipe support nothing left amount docking according to claim 1, it is characterized in that, when installing column, every root post stays 50mm surplus.
4. the method for construction of liquefied gas carrier unit pipe support nothing left amount docking according to claim 1, it is characterized in that, the smooth deviation of described horizontal base plan is ± 5mm to the maximum.
5. the method for construction of liquefied gas carrier unit pipe support nothing left amount docking according to claim 1, it is characterized in that, stand up rear according to platform upper pillar stand locating point location, adopted channel-section steel or other shaped steel adjustment height in bottom, each column place, ensure that unit pipe support upper surface is positioned at same level.
6. the method for construction of liquefied gas carrier unit pipe support nothing left amount docking according to claim 1, it is characterized in that, after the installation of iron Xi part, priming paint is made in overall polishing, then carry out the installation of shipyard pipe holder, liquefied cargo system pipe holder is installed, the outfield prepackage of carbon steel pipeline and corrosion-resistant steel pipeline.
7. the method for construction of liquefied gas carrier unit pipe support nothing left amount docking according to claim 1, it is characterized in that, when flow container hangs in hull, topside tank and main deck are all closed, and deck liquid goods area equipment carries out the lifting of unit pipe support after locating.
8. the method for construction of liquefied gas carrier unit pipe support nothing left amount docking according to claim 1, is characterized in that, before the lifting of unit pipe support is gone on board, is moved to by unit pipe support altitude location horizon apart from actual deck plane 1.5m height.
9. the method for construction of liquefied gas carrier unit pipe support nothing left amount docking according to claim 1, is characterized in that, before unit pipes is erected and hung on ship, presets corresponding column base pad aboard ship.
10. the method for construction of liquefied gas carrier unit pipe support nothing left amount docking according to claim 1, it is characterized in that, during the location of pipe support upper level and levels of planarity, laser or bracing wire inspection are carried out to each horizontal surface of unit pipe support, each column is got a little, prescind each posts bottom surplus, again check that upper surface planeness is until two adjacent cells diff-Hs are no more than 5mm.
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| CN114275115A (en) * | 2022-01-19 | 2022-04-05 | 江南造船(集团)有限责任公司 | Installation method and installation precision control system of vibration-resistant square steel of ship equipment base |
| CN114275115B (en) * | 2022-01-19 | 2023-01-20 | 江南造船(集团)有限责任公司 | Installation method and installation precision control system of vibration-resistant square steel of ship equipment base |
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