CN107477353B - A kind of container fitting method inside and outside LNG storage tank - Google Patents
A kind of container fitting method inside and outside LNG storage tank Download PDFInfo
- Publication number
- CN107477353B CN107477353B CN201710639012.2A CN201710639012A CN107477353B CN 107477353 B CN107477353 B CN 107477353B CN 201710639012 A CN201710639012 A CN 201710639012A CN 107477353 B CN107477353 B CN 107477353B
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- CN
- China
- Prior art keywords
- support
- inner pressurd
- pressurd vessel
- outer container
- fitting
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C3/00—Vessels not under pressure
- F17C3/02—Vessels not under pressure with provision for thermal insulation
- F17C3/08—Vessels not under pressure with provision for thermal insulation by vacuum spaces, e.g. Dewar flask
- F17C3/085—Cryostats
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/22—Assembling processes
- F17C2209/221—Welding
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a kind of container fitting method inside and outside LNG storage tank, 1) outer container prepares, 2) inner pressurd vessel prepares, 3) fitting prepares, and 4) fitting.The upper support point aperture of outer container A-A and B-B supporting section, lower support are spot welded backing plate II, and Section A-A lower support is spot welded outer support ring, are inserted into glass reinforced plastic support.In the supporting point position composition backing and inside support ring of inner pressurd vessel.It is fixedly connected with inner pressurd vessel and counterweight container, slings joint steel pipe, mobile content device fitting.When inner pressurd vessel section B-B reaches entry position, outer support ring will be put on outside the glass reinforced plastic support for filling in heat-insulating material, in the inside support ring of jacking lower part, hold the fitting together with inner pressurd vessel.Inner pressurd vessel falls when reaching designated position, is compacted glass reinforced plastic support.Welding section B-B outer support ring is welded in backing plate II, then welds the support construction on top, and fitting is completed.The fitting method increases the full penetration rate of outer container, reduces the leakage point of outer container, reduces the vaccum leakage rate of interlayer between interior outer container.
Description
Technical field
The invention belongs to liquefied natural gas LNG application field, in particular to a kind of LNG cold tank contents device
Method of the fitting into outer container.
Background technique
Natural gas is pollution-free but also low in cost after not only burning as a kind of clean energy resource, increasingly by society
Pay attention to, application field is gradually expanded.Liquefied natural gas LNG mostly uses Dual-drum low-temperature storage tank to carry out storage and transportation.
LNG Dual-drum low-temperature storage tank is outer container fitting inner pressurd vessel, is vacuum insulation sandwich between interior outer container.?
It is by inner pressurd vessel fitting into outer container under normal circumstances in production process, the then end socket at sealing outer container both ends.Using
Fitting method as shown in Fig. 1, one end of inner pressurd vessel and fitting trolley are fixed, and in outer welding in container track, fitting is small
Vehicle is placed in orbit, is pushed inner pressurd vessel gradually to translate into outer container by overhead traveling crane or active trolley, is realized fitting.The eight of inner pressurd vessel
A support is located in the section A and section B of two end sockets, and 4 support constructions are evenly arranged in each cross-sectional periphery,
For the ease of expanding with heat and contract with cold for inner tank body, the support construction in one of section be it is fixed, as shown in Fig. 2, another section
Support construction be slidingtype, as shown in Figure 3.Before fitting, first the corresponding support position aperture on outer container, inner pressurd vessel therewith
Inner pressurd vessel backing plate is welded in opposite Support Position, fixed support is then needed to weld inside support ring, then fitting.Fitting is complete
After positioning, glass reinforced plastic support is filled in from outer container tapping, outer support lid is buckled, puts on outer container stiffening plate, by outer branch
Support lid, outer container stiffening plate and outer container sealing, fitting are completed.It is interior in order to increase the thermal insulation between inner pressurd vessel and outer container
Package or filling heat insulator, vacuumize to form vacuum interlayer between container and outer container.
In above-mentioned fitting production process, the welding of two end sockets and eight outer supports of outer container is single welding,
Classification society is unsatisfactory for about LNG storage tank outer container peculiar to vessel in the case where no manhole, only allows last one of cylinder and end socket
Girth joint uses the welding point with grommet, remaining weld seam is required to the requirement of full penetration.For this purpose, needing first two-sided welding
One outer container end socket, and the quantity of support aperture is reduced as far as possible, problem is brought to fitting and support setting in this way.
Summary of the invention
Technical problem solved by the present invention is meeting classification society's " gas fuel Power Vessel ship specification " about peculiar to vessel
In the case where LNG gas tank level weld seam requirement welding by both sides full penetration, a kind of new fitting method is provided.
The technical solution adopted by the present invention is that:
A kind of container fitting method inside and outside LNG storage tank, comprising the following steps:
1) outer container prepares: the support construction being evenly arranged on outer container seal head end A-A supporting section is sliding support, set
Closing the support construction being evenly arranged on arrival end B-B supporting section is fixed support；On the top of A-A, B-B supporting section
Supporting point aperture, lower support are spot welded outer container backing plate；It is welded on the lower part outer container backing plate of the A-A supporting section outer
Support ring is inserted into glass reinforced plastic support in the outer support ring；
2) inner pressurd vessel prepares: the position weldering corresponding with outer container supporting point on A-A, B-B supporting section of inner pressurd vessel
Connect inner pressurd vessel backing plate；Inside support ring is welded on the inner pressurd vessel backing plate of the inner pressurd vessel B-B supporting section；It is closed in inner pressurd vessel rear enclosure
Weld fitting backing plate in the centre of end socket；
3) fitting prepares: a steel pipe, the other end of the steel pipe are fixedly connected on the fitting backing plate described in step 2
It is fixedly connected with the counterweight container with inner pressurd vessel equivalent weight；
4) fitting: slinging steel pipe described in step 3), so that the center line of inner pressurd vessel and counterweight container keeps horizontal, in this
Heart line is higher than the horizontal axis of outer container, moves horizontally inner pressurd vessel fitting；When the inside support ring of inner pressurd vessel B-B supporting section reaches
When the fitting entrance face of outer container, heat-insulating material is filled in glass reinforced plastic support, outside puts on outer support ring, in jacking lower part
In support ring；Hold the outer support ring and the glass reinforced plastic support fitting together with inner pressurd vessel；When interior outer container supporting section is overlapped
When, inner pressurd vessel falls, the glass reinforced plastic that the already installed glass reinforced plastic support of compacting A-A supporting section and B-B supporting section are sent into
Support, inner pressurd vessel is consistent with the horizontal center line of outer container at this time；The outer support ring of B-B supporting section lower part is welded in outer container
On backing plate, immobilized substance device；The support construction on top fills in the glass reinforced plastic support for having filled up heat-insulating material by aperture, puts on
Outer support lid welds outer support lid, outer container stiffening plate and outer container, and fitting is completed.
The technological progress achieved by the present invention is:
Using above-mentioned fitting method, an end socket welding by both sides, half support does not have to aperture, ensure that the weld seam of outer container is full
The requirement of sufficient classification society's " gas fuel powered ship specification " weld seam full penetration.Reduce the leakage point of outer container, drop simultaneously
The vaccum leakage rate of interlayer, ensure that the cryogenic property and vacuum life of LNG storage tank between low interior outer container.
Detailed description of the invention
Fig. 1 is inner pressurd vessel routine fitting schematic diagram；
Fig. 2 is B-B supporting section top fixed support structure schematic diagram；
Fig. 3 is A-A supporting section top sliding supporting structure schematic diagram；
Fig. 4 is B-B supporting section lower part fixed support structure schematic diagram；
Fig. 5 is A-A supporting section lower slide support construction schematic diagram；
Fig. 6 is outer container structural schematic diagram before fitting；
Fig. 7 is inner pressurd vessel structural schematic diagram before fitting；
Fig. 8 is inner pressurd vessel preparation schematic diagram before fitting；
Fig. 9 is fitting process schematic；
Wherein: 1 inner pressurd vessel, 2 outer containers, 3 guide rails, 4 fitting trolleies, 5 outer container stiffening plates, 6 outer support lids, 7 glass reinforced plastics
Support, 8 vacuum interlayers, 9 inside support rings, 10 inner pressurd vessel backing plates, 11 heat-insulating materials, 12 end sockets, 13 outer barreies, 14 outer container pads
Plate, 15 outer support rings, 16 inner pressurd vessel pipelines, 17 fitting backing plates, 18 steel pipes, 19 counterweight containers.
Specific embodiment
The welding of the present embodiment outer container one end end socket is completed, A-A supporting section and four, B-B supporting section top support knot
Structure aperture on outer container, for the support construction of lower part four in outer container not aperture, fitting method is as follows, is specifically shown in attached drawing 2-9.
1, outer container prepares: as shown in Fig. 6, end socket 12 is welded together with outer barrel 13 using welding by both sides, eight branch
Two supporting sections of support structure are that the A-A supporting section close to end socket 12 and the B-B support close to outer container fitting entrance are cut
Face, wherein the support construction of A-A supporting section is sliding support, and Fig. 3 is the signal of A-A supporting section top sliding supporting structure
Figure, the supporting point aperture of two, outer container top；Fig. 5 is A-A supporting section lower slide support construction schematic diagram, outer container lower part
Outer container backing plate 14 and outer support ring 15 are welded in two supporting point not apertures, and glass reinforced plastic support 7 is inserted into outer support ring 15,
Glass fibre cotton heat-insulating material 11 is filled in glass reinforced plastic support 7.The support construction of B-B supporting section is fixed support.Fig. 2 is
B-B supporting section top fixed support structure schematic diagram, the supporting point aperture of two, outer container top, Fig. 4 are under B-B supporting section
Portion's fixed support structure schematic diagram；The support of lower part two is spot welded outer container backing plate 14.
2, inner pressurd vessel prepares: as shown in Fig. 7, after the completion of inner pressurd vessel welding, in the A-A supporting section cooperated with outer container
On four supports be spot welded inner pressurd vessel backing plate 10, four supports on the B-B supporting section cooperated with outer container are spot welded
Inner pressurd vessel backing plate 10 and inside support ring 9.The seal head end that inner pressurd vessel pipeline 15 is all bent towards to rear fitting, in the rear fitting of inner pressurd vessel
End socket centre weld fitting backing plate 17.
3, fitting prepares: as shown in Fig. 8, connection is welded and fixed on the fitting backing plate 17 of inner pressurd vessel 1 or bolt is fixed
A steel pipe 18 is connected, the other end of steel pipe 18 is equally fixedly connected with the counterweight container 19 with 1 equivalent weight of inner pressurd vessel.
4, fitting: as shown in Fig. 9, steel pipe 18, the center line holding water of inner pressurd vessel 1 and counterweight container 19 are sling with overhead traveling crane
Flat, close to outer container 2, the horizontal axis of Suitable content device 1 is allowed to the horizontal axis of slightly above outer container 2, then moves day
Vehicle fitting.When entrance face of the inside support ring 9 of the B-B supporting section of inner pressurd vessel close to outer container, in glass reinforced plastic support 7
Fill in glass fibre cotton heat-insulating material 11, outside puts on outer support ring 15, in the inside support ring 9 of jacking lower part two.Overhead traveling crane is mobile
Continue fitting, supports outer support ring 15 and glass reinforced plastic support 7 fitting together with inner pressurd vessel.When inner pressurd vessel plunge depth reaches drawing
It is required that when, that is, when reaching Support Position, A-A the and B-B supporting section of interior outer container is overlapped, and inner pressurd vessel 1 slowly falls, and is compacted A-
A supporting section two already installed glass reinforced plastic supports 7 and B-B supporting section are sent into two glass reinforced plastic supports of inner pressurd vessel 1
7, inner pressurd vessel is consistent with the horizontal center line of outer container at this time.Weld two outer support rings 15 that B-B supporting section lower part is sent into
In on outer container backing plate 14, then immobilized substance device assembles four support constructions on top.Since B-B supporting section distance is outer
13 entrance of cylinder is closer, and human weld's operation may be implemented.Four support constructions on top are filled in by aperture has filled up glass
The glass reinforced plastic support 7 of glass cellucotton heat-insulating material 11, then buckles outer support lid 6, puts on outer container stiffening plate 5, by outer support
Lid 6, outer container stiffening plate 5 are welded on outer container, and fitting is completed.
After the completion of fitting, group welds grommet at the welding groove of outer container end socket, is docked on outer barrel, bottom argon arc welding envelope
Automatic welding capping is welded, the sealing of outer container is completed.
Using above-mentioned fitting method, an end socket welding by both sides, half support does not have to aperture, ensure that the weld seam of outer container is complete
Penetration rate meets classification society rule's requirement.The vaccum leakage rate for reducing interlayer between interior outer container simultaneously, ensure that LNG
The service performance of storage tank and service life.
Claims (1)
1. a kind of container fitting method inside and outside LNG storage tank in one end socket welding completion of outer container, reduces the aperture of half supporting point
In the case where, inner pressurd vessel is integrally linked in outer container, while installing the fixed support and sliding support of immobilized substance device,
It is characterized by: method includes the following steps:
1) outer container prepares: the support construction being evenly arranged on outer container (2) seal head end A-A supporting section is sliding support, set
Closing the support construction being evenly arranged on arrival end B-B supporting section is fixed support；On the top of A-A, B-B supporting section
Supporting point aperture, lower support are spot welded outer container backing plate (14)；In the lower part outer container backing plate (14) of the A-A supporting section
Upper welding outer support ring (15), the outer support ring (15) is middle to be inserted into glass reinforced plastic support (7)；
2) inner pressurd vessel prepares: the position corresponding with outer container (2) supporting point on A-A, B-B supporting section of inner pressurd vessel (1)
It welds inner pressurd vessel backing plate (10)；Inside support ring (9) are welded on the inner pressurd vessel backing plate (10) of the inner pressurd vessel B-B supporting section；
Fitting backing plate (17) are welded in the centre of inner pressurd vessel rear head；
3) fitting prepares: a steel pipe (18), the steel pipe (18) are fixedly connected on the fitting backing plate (17) described in step 2
The other end be fixedly connected with the counterweight container (19) of inner pressurd vessel (1) equivalent weight；
4) fitting: slinging steel pipe described in step 3) (18), so that the center line of inner pressurd vessel (1) and counterweight container (19) keeps water
Flat, which is higher than the horizontal axis of outer container (2), moves horizontally inner pressurd vessel (1) fitting；When inner pressurd vessel (1) B-B support is cut
When the inside support ring (9) in face reaches the fitting entrance face of outer container (2), heat-insulating material is filled in glass reinforced plastic support (7)
(11), outside is put on outer support ring (15), in jacking lower part inside support ring (9)；Hold the outer support ring (15) and glass reinforced plastic
Support (7) fitting together with inner pressurd vessel；When interior outer container supporting section is overlapped, inner pressurd vessel (1) falls, and compacting A-A support is cut
The glass reinforced plastic support (7) that the already installed glass reinforced plastic support in face (7) and B-B supporting section are sent into, at this time inner pressurd vessel and outer appearance
The horizontal center line of device is consistent；The outer support ring (15) of B-B supporting section lower part is welded in outer container backing plate (14), immobilized substance
Device；The support construction on top fills in the glass reinforced plastic support (7) for having filled up heat-insulating material (11) by aperture, buckles outer support lid
(6), outer container stiffening plate (5) are put on, outer support lid (6), outer container stiffening plate (5) and outer container (2) are welded, fitting is complete
At.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710639012.2A CN107477353B (en) | 2017-07-31 | 2017-07-31 | A kind of container fitting method inside and outside LNG storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710639012.2A CN107477353B (en) | 2017-07-31 | 2017-07-31 | A kind of container fitting method inside and outside LNG storage tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107477353A CN107477353A (en) | 2017-12-15 |
| CN107477353B true CN107477353B (en) | 2019-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710639012.2A Active CN107477353B (en) | 2017-07-31 | 2017-07-31 | A kind of container fitting method inside and outside LNG storage tank |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100296450B1 (en) * | 1998-12-28 | 2001-08-07 | 김주국 | Construction Method of Reinforced Concrete LNG Tank |
| CN104373806A (en) * | 2013-08-12 | 2015-02-25 | 西安轨道交通装备有限责任公司 | Device for sleeving inner and outer tank body of low-temperature container |
| CN104061433B (en) * | 2014-06-30 | 2016-01-13 | 武汉一冶钢结构有限责任公司 | Outer tank nesting method in a kind of small-sized LNG double-layer tank |
| CN204099901U (en) * | 2014-09-16 | 2015-01-14 | 江西制氧机有限公司 | A kind of low-temperature (low temperature) vessel vacuum sandwich low heat conduction glass reinforced plastic support structure |
| CN105458609B (en) * | 2015-12-28 | 2017-05-10 | 中车长江车辆有限公司 | Tank sleeving technological method of railway tank car of double-layer structure |
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| CN107477353A (en) | 2017-12-15 |
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Inventor after: Zhao Cuicha Inventor after: Niu Xuezhong Inventor after: Wu Changsheng Inventor after: Zhang Xiangxiang Inventor after: Cui Wentian Inventor before: Zhao Cuicha Inventor before: Niu Xuezhong Inventor before: Zhang Xiangxiang Inventor before: Wu Changsheng Inventor before: Cui Wentian |
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