CN103758387B - The mounting method of liquefied natural gas (LNG) tank wallboard - Google Patents
The mounting method of liquefied natural gas (LNG) tank wallboard Download PDFInfo
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- CN103758387B CN103758387B CN201410055854.XA CN201410055854A CN103758387B CN 103758387 B CN103758387 B CN 103758387B CN 201410055854 A CN201410055854 A CN 201410055854A CN 103758387 B CN103758387 B CN 103758387B
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Abstract
A mounting method for liquefied natural gas (LNG) tank wallboard, before installation, first prefabricated several piece wallboard, during installation, by several piece wallboard by more than first lap wallboard, the second circle wallboard, the 3rd circle wallboard and the 4th circle wallboard successively upwards hoop installation; Wherein, first lap wallboard, the second circle wallboard, the 3rd circle wallboard are laterally successively upwards hoop installation; More than 4th circle wallboard adopt the mode of vertically successively upwards installing, and the bottom of first lap wallboard is connected with storage tank bottom plate.Structure of the present invention is simple, easy construction; Not only effectively reduce the Deformation control difficulty in wallboard installation process, reduce the use amount of welding job amount and welding material; And, also reduce difficulty of construction, improve security performance and the efficiency of construction of liquefied natural gas (LNG) tank.
Description
Technical field
The present invention relates to liquefied natural gas (LNG) tank, particularly relate to a kind of mounting method of liquefied natural gas (LNG) tank wallboard.
Background technology
Along with the enhancing of expanding economy and people's environmental consciousness, liquefied natural gas (LNG) is as a kind of clean, energy efficiently, and its demand grows with each passing day, and this just requires the developing steps must accelerating liquefied natural gas correlation technique.For the liquefied natural gas industry of technology-intensive type, research and development liquefied natural gas correlation technique, especially liquefied natural gas (LNG) tank correlation technique, have important Social benefit and economic benefit to the development of liquefied natural gas industry.
Liquefied natural gas (LNG) tank is mainly divided into according to the mechanics bearing mode for liquid and vapour seal system: singly hold tank, double volume tank, full appearance tank and film tank, and wherein, full appearance tank is the main pot of the domestic receiving terminal put into operation at present.Full appearance tank comprises: primary tank and time container, jointly forms an overall storage tank, and primary tank should be the steel of self-supporting, single wall tank carrys out receiving fluids working medium, and material adopts 9% low temperature resistant nickel steel usually.
As Fig. 1, shown in Figure 1A, the primary tank wallboard of existing liquefied natural gas (LNG) tank, the method that general employing hoop is successively upwards installed, tank shell 1 in the first lap be connected with liquefied natural gas (LNG) tank base plate, after installing location, junction all adopts steel jig to rigidly fix, then, the second circle wallboard, the 3rd circle wallboard are successively upwards installed also by that analogy.Because the Deformation control difficulty of wallboard is larger, during welding, residual stress is more serious; And due to wallboard ring be upwards install, in order to controlling distortion and guarantee installation dimension, after completing vertical abutment joint welding, welding ring is to seam again, when rigidly fixing, still easily there is corner angle distortion in the joint of vertical weld seam and circumferential welded seam, especially when stave sheets is thinner, corner angle problem on deformation is then more outstanding.As: when wall panel thickness is less than 13mm, the vertical weld seam of stave sheets and the angularity deflection of circumferential welded seam reach more than 10 millimeter; Meanwhile, the thinner storage tank of wall panel thickness is in building course, and the welding of stave sheets hoop butt joint, be difficult to adopt technology of automatic submerged arc, the existing main construction welding procedure of this type of stave sheets is manual electric arc welding.The material of wallboard is 9%Ni steel, and the welding of its circumferential welded seam, compared with the welding of vertical weld seam, adopts manual electric arc welding welding easily to produce the defect such as pore, incomplete fusion, the serious quality that have impact on storage tank and security performance.Therefore, there is great difficulty in the quality control on construction of liquefied natural gas (LNG) tank wallboard, therefore, is necessary to make further improvements existing liquefied natural gas (LNG) tank wall.
Summary of the invention
Main purpose of the present invention is the above-mentioned shortcoming overcoming prior art existence, and a kind of mounting method of liquefied natural gas (LNG) tank wallboard of improvement is provided, it not only significantly reduces the Deformation control difficulty in stave sheets installation process, decreases integral solder workload; And, also improve the security performance of liquefied natural gas (LNG) tank, extend its application life; Efficiently solve that wallboard deflection in existing mounting method is large, size Control difficulty is large and large the caused wallboard fatigue strength reduction etc. of wallboard welding residual stress affects the technical problem in construction quality and application life.
The object of the invention is to be realized by following technical scheme:
A mounting method for liquefied natural gas (LNG) tank wallboard, before installation, first prefabricated several piece wallboard, during installation, by several piece wallboard by more than first lap wallboard, the second circle wallboard, the 3rd circle wallboard and the 4th circle wallboard successively upwards hoop installation; It is characterized in that: first lap wallboard, the second circle wallboard, the 3rd circle wallboard are laterally successively upwards hoop installation; More than 4th circle wallboard adopt the mode of vertically successively upwards installing, and the bottom of first lap wallboard is connected with storage tank bottom plate.
The thickness of described first lap wallboard, the second circle wallboard, the 3rd circle wallboard reduces one by one, and is all greater than the thickness of more than the 4th circle wallboard.
Described 4th circle wallboard and all equal with the thickness of wainscot.
Seam crossing between described first lap wallboard and base plate adopts steel fixed block to fix, and after completing the welding of first lap wallboard vertical weld seam, then carries out the welding, so that the welding deformation of control base plate of first lap wallboard and back plate connections.
The material of described first lap wallboard, the second circle wallboard, the 3rd circle wallboard and the 4th circle wallboard is 9%Ni steel.
Beneficial effect of the present invention: the present invention is owing to adopting technique scheme, and its structure is simple, easy construction; Not only effectively reduce the Deformation control difficulty in wallboard installation process, reduce the use amount of welding job amount and welding material; And, also reduce difficulty of construction, improve security performance and the efficiency of construction of liquefied natural gas (LNG) tank.
Below in conjunction with drawings and the specific embodiments, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is prior art structural representation.
Figure 1A is that prior art structure launches schematic diagram.
Fig. 2 is structural representation of the present invention.
Fig. 2 A is that structure of the present invention launches schematic diagram.
Fig. 3 is structure one embodiment schematic diagram of the present invention.
Fig. 3 A is that structure one embodiment of the present invention launches schematic diagram.
Major label description in figure:
1. first lap wallboard, 2. the second circle wallboard, 3. the 3rd circle wallboard, 4. the 4th circle wallboard, 5. base plate.
Detailed description of the invention
As shown in Fig. 1-Fig. 3 A, before the present invention installs, first prefabricated several piece wallboard, first lap wallboard 1 length in several piece wallboard is: 11781mm, 1 piece of first lap wallboard 1 length are: 7618mm and 1 piece of first lap wallboard 1 length is: 4163mm, and all first lap wallboard 1 width are: 2875mm, thickness are: the rectangular steel plates of 13mm; And according to design drawing and the prefabricated specifications of steel plate, the seam groove of all first lap wallboards 1 is carried out to the pre-bending of machine and wallboard.Then, respectively prefabricated several piece shape second enclose wallboard 2 and three enclose wallboard 3 identical with first lap wallboard 1, its specification is: long 11780mm, wide: 2875mm, thickness is respectively: the rectangular steel plates of 10mm, 9mm, same according to design drawing and the prefabricated specifications of steel plate, the pre-bending of machine and wallboard is carried out to the seam groove of all second circle wallboards 2, the 3rd circle wallboard 3; Prefabricated 4th circle wallboard 4, specification is: the rectangular steel plates of long 7200mm, wide 2956mm, thickness 8mm, equally according to design drawing and the prefabricated specifications of steel plate, the seam groove of the 4th circle wallboard 4 is carried out to the pre-bending of machine and wallboard, then, by the successively upwards hoop installation of several piece wallboard.During installation, first lap wallboard 1, second encloses wallboard 2, the 3rd circle wallboard 3 is laterally successively upwards hoop installation; 4th circle wallboard more than 4 adopts the mode of vertically successively upwards installing, and the bottom of first lap wallboard 1 is connected with storage tank bottom plate 5; Seam crossing between first lap wallboard and base plate adopts steel fixed block to be fixed, and after completing the welding of first lap wallboard vertical weld seam, then carries out the welding, so that the welding deformation of control base plate of first lap wallboard 1 and base plate 5 junction.
Above-mentioned first lap wallboard 1, second encloses wallboard 2, the thickness of the 3rd circle wallboard 3 reduces one by one, and is all greater than the thickness of the 4th circle wallboard more than 4.
Above-mentioned 4th circle wallboard 4 and all equal with the thickness of wainscot.
The material of above-mentioned first lap wallboard, the second circle wallboard, the 3rd circle wallboard and the 4th circle wallboard is 9%Ni steel.
The concrete installation steps of several piece wallboard are as follows:
The first step, by first lap wallboard 1 block-by-block hoisted in position, and adjusting the verticality of wallboard, circularity, levelness and welding point group to gap, verticality must not exceed: 14mm, circularity must not exceed: ± 19mm, and welding point group is to clearance control: within the scope of 2-4mm; Wrong skin amount: must not more than 1.5mm.
Second step, steel fixed block is adopted the angle-style seam between first lap wallboard 1 and base plate 5 to be fixed, and after completing the vertical weld seam welding of first lap wallboard 1, then carry out the welding, so that control the welding deformation of base plate 5 of seam between first lap wallboard 1 with base plate 5;
3rd step, installation platform, installation principle: constructability, does not affect the vertical weld seam welding of the second circle wallboard 2 and is advisable;
4th step, according to design drawing, by the second circle wallboard 2 hoisted in position, adjust the verticality of the second circle wallboard 2, circularity, levelness and welding point group to gap, installation accuracy is identical with the requirement of the above-mentioned first step, and rigidly fixes hoop seam;
5th step, according to design drawing, completes the second circle wallboard 2 groups to rear, removes the construction door opening plate of first lap wallboard 1, and completes the reinforcing at door opening place;
6th step, repeats the 4th step, the 5th step until complete the installation of the 3rd circle wallboard 3;
7th step, according to design and installation drawing, by the 4th circle wallboard 4 hoisted in position, adjust its installation dimension such as verticality, circularity, rigidly fix again behind location, then, complete the welding of vertical weld seam, after 4th circle wallboard 4 is all in place, welding the 4th circle wallboard 4 and the 3rd encloses hoop seam between wallboard 3.
8th step, repeats the 7th step until complete the installation of the 5th circle wallboard.
Completing in pump in storage tank, storage tank after all storage tanks inner member installation such as ladder, then carry out the installation of above-mentioned steps 5 door opening plate, and form a storage tank closed by wallboard wall.
In the installation process of wallboard, while controlling each circle wallboard verticality, must ensure that the error of storage tank overall vertical degree is no more than the requirement of height 1/200.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, every above embodiment is done according to technical spirit of the present invention any simple modification, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (5)
1. a mounting method for liquefied natural gas (LNG) tank wallboard, before installation, first prefabricated several piece wallboard, during installation, by several piece wallboard by more than first lap wallboard, the second circle wallboard, the 3rd circle wallboard and the 4th circle wallboard successively upwards hoop installation; It is characterized in that: first lap wallboard, the second circle wallboard, the 3rd circle wallboard are laterally successively upwards hoop installation; More than 4th circle wallboard adopt the mode of vertically successively upwards installing, and the bottom of first lap wallboard is connected with storage tank bottom plate.
2. the mounting method of liquefied natural gas (LNG) tank wallboard according to claim 1, is characterized in that: the thickness of described first lap wallboard, the second circle wallboard, the 3rd circle wallboard reduces one by one, and is all greater than the thickness of more than the 4th circle wallboard.
3. the mounting method of liquefied natural gas (LNG) tank wallboard according to claim 1, is characterized in that: described 4th circle wallboard and all equal with the thickness of wainscot.
4. the mounting method of liquefied natural gas (LNG) tank wallboard according to claim 1, it is characterized in that: the seam crossing between described first lap wallboard and base plate adopts steel fixed block to fix, and after completing the vertical weld seam welding of first lap wallboard, carry out welding of first lap wallboard and back plate connections again, so that control the welding deformation of base plate.
5. the mounting method of the liquefied natural gas (LNG) tank wallboard according to claim 1,2,3 or 4, is characterized in that: the material of described first lap wallboard, the second circle wallboard, the 3rd circle wallboard and the 4th circle wallboard is 9%Ni steel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410055854.XA CN103758387B (en) | 2014-02-19 | 2014-02-19 | The mounting method of liquefied natural gas (LNG) tank wallboard |
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| CN201410055854.XA CN103758387B (en) | 2014-02-19 | 2014-02-19 | The mounting method of liquefied natural gas (LNG) tank wallboard |
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| CN103758387B true CN103758387B (en) | 2016-02-10 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060873A (en) * | 2014-06-30 | 2014-09-24 | 成都高普石油工程技术有限公司 | Vertical storage tank prefabricating installing construction method |
| CN104456059B (en) * | 2014-10-21 | 2016-09-28 | 中国海洋石油总公司 | The installation method of the interior tank shell of self-support type LNG storage tank |
| CN105805549B (en) * | 2016-03-29 | 2018-06-29 | 中国海洋石油总公司 | The installation method of the hot angle protection system siding of liquefied natural gas full-capacity tank |
| CN109854050B (en) * | 2019-03-18 | 2021-08-31 | 海洋石油工程股份有限公司 | Method for connecting bottom ring wall plate and annular plate of main container of liquefied natural gas storage tank |
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| GB1409265A (en) * | 1972-06-21 | 1975-10-08 | Conch Int Methane Ltd | Tank structures |
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| CN1786550A (en) * | 2004-12-08 | 2006-06-14 | 韩国Gas公社 | Modular walls for use in building liquid tank |
| CN102003095A (en) * | 2010-11-01 | 2011-04-06 | 东北石油大学 | Housing of large-scale liquefied natural gas storage tank and construction method thereof |
| EP2320122A2 (en) * | 2009-11-05 | 2011-05-11 | Korea Gas Corporation | Method of constructing liquefied gas storage tank on land |
| CN102444308A (en) * | 2011-09-20 | 2012-05-09 | 中化二建集团有限公司 | Construction method of double-shell large-scale low-temperature storage tank |
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2014
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB1409265A (en) * | 1972-06-21 | 1975-10-08 | Conch Int Methane Ltd | Tank structures |
| JPH0978878A (en) * | 1995-09-13 | 1997-03-25 | Ishikawajima Harima Heavy Ind Co Ltd | tank |
| CN2352806Y (en) * | 1998-06-13 | 1999-12-08 | 中原石油勘探局 | LNG storage and transportation tank |
| CN1786550A (en) * | 2004-12-08 | 2006-06-14 | 韩国Gas公社 | Modular walls for use in building liquid tank |
| EP2320122A2 (en) * | 2009-11-05 | 2011-05-11 | Korea Gas Corporation | Method of constructing liquefied gas storage tank on land |
| CN102003095A (en) * | 2010-11-01 | 2011-04-06 | 东北石油大学 | Housing of large-scale liquefied natural gas storage tank and construction method thereof |
| CN102444308A (en) * | 2011-09-20 | 2012-05-09 | 中化二建集团有限公司 | Construction method of double-shell large-scale low-temperature storage tank |
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: Offshore Oil Engineering Co., Ltd. Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: Offshore Oil Engineering Co., Ltd. Patentee before: China National Offshore Oil Corporation |
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