CN103015781B - Method for top lift installation of inner tank and outer tank of double-wall storage tank - Google Patents
Method for top lift installation of inner tank and outer tank of double-wall storage tank Download PDFInfo
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- CN103015781B CN103015781B CN201210515320.1A CN201210515320A CN103015781B CN 103015781 B CN103015781 B CN 103015781B CN 201210515320 A CN201210515320 A CN 201210515320A CN 103015781 B CN103015781 B CN 103015781B
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Abstract
A method for top lift installation of an inner tank and an outer tank of a double-wall storage tank is used for solving the producing and installing problems of double-wall storage tank equipment. The method comprises the following construction steps: a, foundation acceptance treatment; b, outer tank bottom plate installation; c, tank bottom thermal insulating layer construction; d, inner tank bottom plate installation; e, inner tank top laying; f, inner tank first belt wall plate installation; g, outer tank top framework installation; h, inner tank top lift installation; I, other inner tank wall plate installation; j, inner tank accessory installation; k, outer tank wall plate installation; l, outer tank top plate layering; and m, test and thermal insulation construction. The method utilizes an inner tank and outer tank inverse assembling technology to simplify double-wall tank installation processes, aerial work quantity can be obviously reduced, the working efficiency is increased, the construction period is shortened, the safety of operating personnel is ensured, and the humanized construction idea is realized.
Description
Technical field
The present invention relates to a kind of engineering equipment fabrication and installation method, especially a kind of construction method being applicable to big-and-middle-sized double-wall storage tank fabrication and installation.
Background technology
Double-wall storage tank is as cryogenic liquid memory device, and it is made up of the inner canister of storing cryogenic fluids and the outer tank of support thermal insulation material, is provided with heat insulating construction layer within it between outer tank.Double-wall storage tank inner canister and outer tank adopt the metal material of unlike material, they are inside and outside tank skin cylindrical shell by the cornice plate assembly welding of some, be welded with inside and outside tank bottom respectively by inside and outside tank skin cylindrical shell again, arrange the inner canister tank deck of flat ceiling structure at interior tank skin cylindrical shell top, tank skin cylindrical shell top arranges the outer tank tank deck of domes outside.General double-wall storage tank inner canister tank deck is suspension type, is suspended on outer tank tank deck by suspension rod; Outer tank tank deck adopts shaped steel to do skeleton, lays tank deck skin panel outside tank deck skeleton.
The difficult point of double-wall storage tank fabrication and installation construction is the installation of outer tank, interior tank deck.At present, the mounting method usually adopted both at home and abroad is: inside and outside tank deck air blow off, upright method of hull section construction or tank body upside-down mounting tank deck upright method of hull section construction (see SH/T3537-2009 " vertical and cylindrical low-temperature storage tank construction technology code ").Said method Problems existing is mainly reflected in the following aspects: one is because outer tank is first constructed, Special annular track need be set on mounted outer tank deck during interior tank skin assembling, hang manually or electric walking lift up into the lifting of tank shell in row, and interior tank skin prefabricated panels needs to be carried by outer tank skin reserved passageway, and working procedure is complicated; Two is that interior tank deck installs employing assembly or air blow off, and work progress is loaded down with trivial details, and amount of high-altitude operation is large, and the construction period is longer; Three is that inner canister assembling space is narrow, and environment is closed, and operating condition is poor.
Summary of the invention
The object of the invention is to the drawback for prior art, provide a kind of in outer tank flip chip technology, installation procedure is simplified, can significantly reduce amount of high-altitude operation, the outer tank deck lifting installation method of the double-wall storage tank inner canister band of construction period of increasing work efficiency, shorten.
Problem of the present invention realizes with following technical proposals:
The outer tank deck lifting installation method of a kind of double-wall storage tank inner canister band, its construction sequence is as follows:
Process is checked and accepted on a, basis: check foundation structure size, marks and installs location dimension line, carry out built-in fitting position detection;
B, outer tank bottom are installed: first outwards lay outer tank bottom center plate from base center, then outer tank bottom edge plate is laid, when external tank bottom margin plate welding, first the outer tank bottom edge plate butt weld at ecto-entad welding margin plate outer most edge 300mm position, then complete the welding of remaining margin plate butt weld, finally carry out welding of shrinkage joint between margin plate with center plate;
Isolation layer construction at the bottom of c, tank: require laying and the cast of carrying out isolation layer at the bottom of tank according to construction drawing;
D, interior tank bottom are installed: first outwards lay interior tank bottom center plate from center, then lay inner canister bottom edge plate, an opposite side listrium butt weld outer most edge 300mm position and the welding of interior tank bottom center plate lap weld;
E, inner canister tank deck are laid: inner canister top board is established on interior tank bottom upper berth, except lifting mast position built-in on interior tank bottom and edge ring flat-plate, complete the assembling of inner canister tank deck remainder;
F, inner canister first is with wallboard to install: install inner canister and be with wallboard from upper terminal number first, install assembling mast;
G, outer tank tank deck skeleton are installed: install outer tank tank deck cage construction, outer tank tank deck skeleton is connected to inner canister first and is with on wallboard;
H, inner canister tank deck erection & lift: inner canister tank deck suspension rod connects with outer tank tank deck skeleton, use built-in mast to promote inner canister tank deck, after hoisting depth exceedes built-in mast height, carry out the assembling that inner canister tank deck does not complete part-structure;
Other tank shells of i, inner canister are installed: use mast and promote electric block with tank skin cylindrical shell in upside-down method of hull-section construction assembling, and synchronously carry out annex installation and Welding Testing, after completing the assembling of interior tank skin cylindrical shell, carry out interior tank skin cylindrical shell to weld with interior tank bottom, remove inner canister assembling mast, after interior tank skin cylindrical shell and interior tank bottom big angle seam welding, complete the welding of interior tank bottom remaining inner canister bottom edge plate butt weld, then the shrinkage joint completed between margin plate with center plate welds;
J, inner canister annex are installed: install inner canister pore and annex, adapter, inner canister stiffening ring;
K, outer tank shell are installed: outer tank shell adopts fliping lifting method to install, lifting pole is connected and fixed with interior tank skin by pull bar, outer tank skin annex is synchronously installed, after outer tank skin cylindrical shell has been assembled, weld outer tank skin cylindrical shell and outer tank bottom big angle seam welding, and remove outer tank skin assembling lifting pole and technique packing;
L, outer tank tank deck plate are laid: remove the temporary support of outer tank tank deck skeleton with interior tank skin, using inner canister tank deck as one-shot job platform, use crane to lay outer tank deck skin panel;
M, test and adiabatic construction: the test carrying out interior outer tank according to designing requirement, carry out the construction of tank internal insulation after qualified.
The outer tank deck lifting installation method of above-mentioned double-wall storage tank inner canister band; when tank bottom installation outside and interior tank bottom are installed; to adjacent center plate lap weld employing consumable electrode CO2 gas shield welding method, the welding employing welder of opposite side listrium outer most edge 300mm position butt weld is uniformly distributed, the method for symmetrical welding.
The outer tank deck lifting installation method of above-mentioned double-wall storage tank inner canister band, when carrying out outer tank tank deck skeleton and installing, uses temporary support that outer tank tank deck skeleton is connected to inner canister first and is with on wallboard.
The outer tank deck lifting installation method of above-mentioned double-wall storage tank inner canister band, when carrying out inner canister tank deck erection & lift, inner canister tank deck suspension rod connects with outer tank tank deck skeleton, and form inner canister tank deck, the assembly of inner canister first with wallboard and outer tank tank deck skeleton, described assembly and inner canister cylindrical body synchronous promote.
The outer tank deck lifting installation method of above-mentioned double-wall storage tank inner canister band, when carrying out inner canister and the assembling of outer tank shell, packing is all installed in the inner side of each band wallboard, after completing interior tank skin cylindrical shell and interior tank bottom Welding Testing, the packing of interior tank shell is removed, after completing last band wallboard installation of outer tank, remove outer tank shell packing.
In the present invention, outer tank adopts flip chip technology, and safe and reliable, efficiency is high; Inner canister tank deck of the present invention is laid and major part is welded constructs on the ground, decreases amount of high-altitude operation; Outer tank tank deck skeleton of the present invention is arranged on inner canister first and is with on wallboard, forms tank deck assembly Synchronous lifting, installation procedure is simplified, shortens the construction period with inner canister tank deck; Outside tank body Construction Mode of the present invention is rear first, improve operating condition, working security improves greatly.In a word, the present invention makes double-wall storage tank installation procedure simplify, significantly can reduce amount of high-altitude operation, not only increases operating efficiency, shortens the construction period, and ensure that the safety of operating personnel, embody the construction concept of hommization.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is double-wall storage tank structural representation;
Fig. 2 is top view at the bottom of outer tank tank;
Fig. 3 is top view at the bottom of inner canister tank;
Fig. 4 is outer tank tank deck temporary support installation drawing;
Fig. 5 is A place schematic enlarged-scale view in Fig. 4;
Fig. 6 is that tank deck assembly promotes schematic diagram;
Fig. 7 is that tank deck assembly promotes top view;
Fig. 8 is interior tank skin cylindrical shell erection & lift schematic diagram;
Fig. 9 is outer tank skin cylindrical shell erection & lift schematic diagram;
Figure 10 is outer tank skin cylindrical shell hoisting mechanism top view.
In figure, each list of reference numerals is: 1, outer tank tank deck, 2, outer tank skin cylindrical shell, 2-1, outer tank first is with wallboard, 2-2, other wallboards of outer tank, 3, outer tank stiffening ring, 4, outer tank annex, 5, outer tank bottom, 5-1, outer tank bottom center plate, 5-2, outer tank bottom edge plate, 5-3, the butt weld of outer tank bottom edge plate, 5-4, outer tank bottom center plate lap weld, 6, interior tank bottom, 6-1, interior tank bottom center plate, 6-2, inner canister bottom edge plate, 6-3, the butt weld of inner canister bottom edge plate, 6-4, interior tank bottom center plate lap weld, 7, heat insulation layer, 8, inner canister stiffening ring, 9, interior tank skin cylindrical shell, 9-1, inner canister first is with wallboard, 9-2, other wallboards of inner canister, 10, inner canister tank deck, 11, suspension rod, 12, temporary support, 13, wire rope, 14, inner canister tank deck promotes suspension centre, 15, promote cucurbit, 16, hanger, 17, packing, 18, buttress, 19, mast, 20, lifting pole, 21, pull bar.
Detailed description of the invention
Referring to Fig. 1, double-wall storage tank is made up of inner and outer tank, is provided with heat insulation layer 7 within it between outer tank.Double-wall storage tank inner canister and outer tank adopt the metal material of unlike material, they are interior tank skin cylindrical shell 9, outer tank skin cylindrical shell 2 by the cornice plate assembly welding of some, be welded with interior tank bottom 6, outer tank bottom 5 respectively by interior tank skin cylindrical shell 9, outer tank skin cylindrical shell 2 again, arrange the inner canister tank deck 10 of flat ceiling structure at interior tank skin cylindrical shell 9 top, tank skin cylindrical shell 2 top arranges the outer tank tank deck 1 of domes outside.This double-wall storage tank inner canister tank deck 10 is suspension type, is suspended on outer tank tank deck 1 by suspension rod 11; Outer tank tank deck 1 adopts shaped steel to do skeleton, lays top skin panel outside parietal bone frame.
Referring to Fig. 2 ~ Figure 10, the present invention is the outer tank deck lifting installation method of double-wall storage tank inner canister band, first carry out basis to check and accept and process, carry out the construction of inside and outside tank bottom and intermediate insulating layer thereof, complete that interior tank bottom 6 is laid again, inner canister tank deck 10 and outer tank tank deck 1 skeleton install, and be with wallboard 9-1 to form assembly with inner canister first, outer tank band wallboard and outer tank top board in secondly installing, finally complete heat insulation layer 7 between interior outer tank and construct.
Its Specific construction step is as follows:
A, basis check and process
The position deviation of I, inspection foundation structure size and built-in fitting;
II, levelling basic mounting plane, mark outer tank bottom 5 and install location dimension line.
B, outer tank bottom 5 are installed
I, outside tank bottom 5 soffit are by designing requirement brushing anticorrosive paint;
II, outer tank bottom 5 is laid, first outer tank bottom center plate 5-1 is outwards laid from center, adjacent outer tank bottom center plate lap weld 5-4 adopts consumable electrode CO2 gas shield welding method, then outer tank bottom edge plate 5-2 is laid, when external tank bottom margin plate 5-2 welds, first the outer tank bottom edge plate butt weld 5-3 at ecto-entad welding margin plate outer most edge 300mm position, the welding of this butt weld adopts welder to be uniformly distributed, the method of symmetrical welding, then the welding of remaining outer tank bottom edge plate butt weld 5-3 is completed, finally carry out welding of shrinkage joint between outer tank bottom edge plate 5-2 with outer tank bottom center plate 5-1, complete outer tank bottom 5 to lay,
III, carry out the nondestructive testing of outer tank bottom 5 and vacuum leakage test.
C, tank bottom heat insulation layer are arranged
I, outside tank bottom lay concrete;
II, levelling rear paving waterproofing course, and foam glass brick is installed and lays dry sand leveling layer.
D, interior tank bottom 6 are installed
I, interior tank bottom 6 are laid, and interior tank bottom center plate 6-1 is outwards laid at Xian Zi center, and adjacent interior tank bottom center plate lap weld 6-4 adopts consumable electrode CO2 gas shield welding method, then lay inner canister bottom edge plate 6-2;
The inner canister bottom edge plate butt weld 6-3 at II, ecto-entad welding margin plate outer most edge 300mm position, the welding employing welder of this butt weld is uniformly distributed, the method for symmetrical welding, and the welding of inner canister bottom edge plate butt weld 6-3 remainder is carried out after inner canister bottom ring wall plate is with bottom edge board welding;
III, interior tank bottom center plate 6-1 assembling and welding method are consistent with center plate at the bottom of outer tank, and center plate carries out after bottom edge board has all welded with inner canister bottom edge plate 6-2 welding.
E, inner canister tank deck 10 are laid
I, inner canister tank deck plate are laid on interior tank bottom 6, except lifting mast 19 position built-in on interior tank bottom and edge ring flat-plate, complete the assembling of inner canister top board remainder;
II, assembly welding inner canister tank deck 10, inner canister top board girth sheets is installed according to outer tank tank deck 1 frame position location, ensures that inner canister top board girth sheets upper hanger connecting hole is corresponding with suspension rod 11.
F, inner canister first is with wallboard 9-1 to install
I, inner canister first is installed when being with wallboard (counting from interior tank deck) 9-1, on interior tank bottom 6 margin plate, the along the circumferential direction buttress 18 of uniform placement 30-40 high 60mm, on buttress, tank body interior diameter assembling circumference is marked after buttress 18 is levelling, synchronous installation assembling mast 19, installs built-in assembling packing 17;
II, according to the good position of material cutting plan mark, lifting of checking the number, group is with wallboard 9-1 to inner canister first, and adjust weld gap with jig, spot welding is fixed;
III, requirement by welding procedure, carry out the welding of tank skin longitudinal seam, and outside it, install inner canister stiffening ring 8.
G, outer tank tank deck 1 skeleton are installed
I, arrange assembling vault falsework;
II, assembling longitudinal rib, hoop muscle;
The installation with temporary support 12 between wallboard 9-1 of III, outer tank vault construction and inner canister first, every root vault beam installs a temporary support 12, calculate its length by Design Requirement Drawing, temporary support 12 should be with wallboard place inner canister stiffening ring 8 to adopt intermittent weld mode to weld with first.
H, interior tank deck erection & lift
Built-in mast 19 and wire rope 13 is used to promote inner canister tank deck 10, inner canister top board promotes suspension centre 14 and is axially evenly arranged along inner canister tank deck 10, inner canister tank deck 10 suspension rod 11 connects with outer tank tank deck 1 skeleton, exceed after built-in mast 19 height until interior tank body assembled height, assembling inner canister tank deck 10 does not complete part.
Other wallboards of i, inner canister 9-2 installs
I, use promote mast 19 and promote cucurbit 15 and adopt upside-down method of hull-section construction to assemble interior tank skin cylindrical shell 9, and synchronously carry out annex installation and Welding Testing;
Tank skin cylindrical shell 9 and interior tank bottom 6 weld seam in II, welding, at the large fillet weld of interior tank skin cylindrical shell 9 and interior tank bottom 6, and remove inner canister assembling mast 19 and packing 17, complete the welding of interior tank bottom 6 remaining inner canister bottom edge plate butt weld 6-3, then the shrinkage joint completed between margin plate with center plate welds.
J, inner canister annex are installed
The annex such as inner canister pore and annex, adapter, anchoring piece is installed;
K, outer tank shell are installed
I, outer tank shell adopt fliping lifting method to install by lifting pole 20 and lifting cucurbit 15, outside on tank bottom 5 margin plate, the along the circumferential direction buttress 18 of uniform placement 30-40 high 60mm, on buttress, tank body interior diameter assembling circumference is marked after buttress is levelling, lifting pole 20 is connected and fixed with interior tank skin by pull bar 21, adopt the outer tank shell of upside-down installation method, outer tank annex 4 is synchronously installed;
II, weld seam nondestructive testing intert carry out.
The assembling of l, tank deck
After the assembling of I, outside tank skin cylindrical shell 2, carry out the assembling of tank deck, remove outer tank skin cylindrical shell 2 assembling lifting pole 20 and packing 17;
II, on vault beam the outer tank deck skin panel of symmetrical laying, remove the temporary support 12 of outer tank parietal bone frame with interior tank skin, use crane to lay outer tank deck skin panel.
M, test and adiabatic construction
Carry out the test of interior outer tank according to designing requirement, carry out tank internal insulation 7 after qualified and construct.
Claims (4)
1. the outer tank deck lifting installation method of double-wall storage tank inner canister band, it is characterized in that, construction sequence is as follows:
Process is checked and accepted on a, basis: check foundation structure size, marks and installs location dimension line, carry out built-in fitting position detection;
B, outer tank bottom (5) are installed: first outwards lay outer tank bottom center plate (5-1) from base center, then outer tank bottom edge plate (5-2) is laid, when external tank bottom margin plate (5-2) is welded, first outer tank bottom edge plate butt weld (5-3) at ecto-entad welding margin plate outer most edge 300mm position, then complete the welding of remaining margin plate butt weld, finally carry out welding of shrinkage joint between margin plate with center plate;
Isolation layer construction at the bottom of c, tank: require laying and the cast of carrying out isolation layer at the bottom of tank according to construction drawing;
D, interior tank bottom (6) are installed: first outwards lay interior tank bottom center plate (6-1) from center, then inner canister bottom edge plate (6-2) is laid, only inner canister bottom edge plate butt weld (6-3) welding at internal tank bottom margin plate outer most edge 300mm position;
E, inner canister tank deck (10) are laid: inner canister top board, in the upper laying of interior tank bottom (6), except upper built-in lifting mast (19) position of interior tank bottom (6) and edge ring flat-plate, completes the assembling of inner canister tank deck (10) remainder;
F, inner canister first is with wallboard (9-1) to install: install inner canister and be with wallboard (9-1) from upper terminal number first, installs assembling with mast (19);
G, outer tank tank deck (1) skeleton are installed: install outer tank tank deck (1) cage construction, outer tank tank deck (10) skeleton is connected to inner canister first and is with on wallboard (9-1);
H, inner canister tank deck (10) erection & lift: inner canister tank deck (10) suspension rod (11) connects with outer tank tank deck skeleton, built-in mast (19) is used to promote inner canister tank deck (10), after hoisting depth exceedes built-in mast (19) height, carry out the assembling that inner canister tank deck (10) does not complete part-structure;
I, other tank shells of inner canister (9-2) are installed: use mast (19) and promote electric block (15) with tank skin cylindrical shell (9) in upside-down method of hull-section construction assembling, and synchronously carry out annex installation and Welding Testing, after completing the assembling of interior tank skin cylindrical shell (9), carry out interior tank skin cylindrical shell (9) to weld with interior tank bottom (6), remove inner canister assembling mast (19), after the large fillet weld of interior tank skin cylindrical shell (9) and interior tank bottom (6), complete the welding of interior tank bottom (6) remaining inner canister bottom edge plate butt weld (6-3), the shrinkage joint completed again between margin plate with center plate welds,
J, inner canister annex are installed: install inner canister pore and annex, adapter, inner canister stiffening ring (8);
K, outer tank shell are installed: outer tank shell adopts fliping lifting method to install, lifting pole (20) is connected and fixed with interior tank skin by pull bar (21), outer tank skin annex (4) is synchronously installed, after outer tank skin cylindrical shell (2) has been assembled, weld outer tank skin cylindrical shell (2) fillet weld large with outer tank bottom (5), and remove outer tank skin assembling lifting pole (20) and technique packing (17);
Outer tank tank deck plate is laid: remove the temporary support (12) of outer tank tank deck skeleton with interior tank skin, using inner canister tank deck (10) as one-shot job platform, uses crane to lay outer tank deck skin panel;
M, test and adiabatic construction: the test carrying out interior outer tank according to designing requirement, carry out tank internal insulation (7) construction after qualified:
When carrying out inner canister tank deck (10) erection & lift, inner canister tank deck (10) suspension rod (11) connects with outer tank tank deck (1) skeleton, form inner canister tank deck (10), assembly, described assembly and interior tank body (9-2) Synchronous lifting of inner canister first with wallboard (9-1) and outer tank tank deck (1) skeleton.
2. the outer tank deck lifting installation method of a kind of double-wall storage tank inner canister band according to claim 1; it is characterized in that; when tank bottom (5) installation outside and interior tank bottom (6) are installed; to adjacent center plate lap weld employing consumable electrode CO2 gas shield welding method, the welding employing welder of opposite side listrium outer most edge 300mm position butt weld is uniformly distributed, the method for symmetrical welding.
3. the outer tank deck lifting installation method of a kind of double-wall storage tank inner canister band according to claim 2, it is characterized in that, when carrying out outer tank tank deck (1) skeleton and installing, use temporary support (12) that outer tank tank deck (1) skeleton is connected to inner canister first and be with on wallboard (9-1).
4. the outer tank deck lifting installation method of a kind of double-wall storage tank inner canister band according to claim 3, it is characterized in that, when carrying out inner canister and the assembling of outer tank shell, packing is all installed in the inner side of each band wallboard, after completing interior tank skin cylindrical shell and interior tank bottom Welding Testing, the packing of interior tank shell is removed, after completing last band wallboard installation of outer tank, remove outer tank shell packing.
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| CN201210515320.1A CN103015781B (en) | 2012-12-05 | 2012-12-05 | Method for top lift installation of inner tank and outer tank of double-wall storage tank |
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| CN103015781A (en) | 2013-04-03 |
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