CN103015781A - 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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- CN103015781A CN103015781A CN2012105153201A CN201210515320A CN103015781A CN 103015781 A CN103015781 A CN 103015781A CN 2012105153201 A CN2012105153201 A CN 2012105153201A CN 201210515320 A CN201210515320 A CN 201210515320A CN 103015781 A CN103015781 A CN 103015781A
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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 job practices that is applicable to big-and-middle-sized double-walled tank fabrication installation.
Background technology
The double-walled storage tank is as the cryogenic liquid memory device, and it is made of the inner canister of storing cryogenic fluids and the outer tank of support thermal insulation material, is provided with the heat insulating construction layer within it between the outer tank.Double-walled 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, the inner canister tank deck of flat ceiling structure is set at interior tank skin cylindrical shell top, and tank skin cylindrical shell top arranges the outer tank tank deck of domes outside.General double-walled storage tank inner canister tank deck is suspension type, is suspended on the outer tank tank deck by suspension rod; The outer tank tank deck adopts shaped steel to do skeleton, lays the tank deck skin panel in the tank deck skeleton outside.
The difficult point of double-walled tank fabrication installation is the installation of outer tank, interior tank deck.At present, the mounting method that usually adopts 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 (referring to SH/T3537-2009 " vertical and cylindrical low-temperature storage tank construction technology rules ").The problem that said method exists is mainly reflected in the following aspects: the one, because outer tank is constructed first, need at mounted outer tank deck the Special annular track to be set during interior tank skin assembling, hang lifting manual or that electric walking is lifted up into tank shell in the row, and interior tank skin prefabricated panels need to be carried by outer tank skin reserved passageway, and working procedure is complicated; The 2nd, interior tank deck is installed and is adopted 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; The 3rd, the inner canister assembling space is narrow, the environment sealing, and operating condition is poor.
Summary of the invention
The object of the invention is to the drawback for prior art, a kind of interior outer tank flip chip technology is provided, installation procedure is simplified, can significantly reduce amount of high-altitude operation, increased work efficiency, shorten the outer tank deck lifting installation method of double-walled storage tank inner canister band of construction period.
Problem of the present invention realizes with following technical proposals:
The outer tank deck lifting installation method of a kind of double-walled storage tank inner canister band, its construction sequence is as follows:
A, basis are checked and accepted and are processed: check the foundation structure size, mark the location dimension line is installed, carry out built-in fitting position detection;
B, outer tank bottom install: tank bottom center plate outside outwards lay the base center at first, then lay outer tank bottom edge plate, when externally the tank bottom margin plate welds, the at first outer tank bottom edge plate butt weld at ecto-entad welding margin plate outer most edge 300mm position, then finish the welding of remaining margin plate butt weld, carry out at last the welding of shrinkage joint between margin plate and the center plate;
Isolation layer construction at the bottom of c, the tank: require to carry out laying and the cast of isolation layer at the bottom of the tank according to construction drawing;
D, interior tank bottom install: tank bottom center plate in outwards lay at the center at first, then lay inner canister bottom edge plate, and an opposite side listrium butt weld outer most edge 300mm position and interior tank bottom center plate lap weld are welded;
E, inner canister tank deck are laid: the inner canister top board is established on interior tank bottom upper berth, built-in lifting mast position and the edge ring flat-plate, finishes the assembling of inner canister tank deck remainder on interior tank bottom;
F, inner canister the first band wallboard are installed: inner canister is installed from upper terminal number the first band wallboard, the assembling mast is installed;
G, outer tank tank deck skeleton are installed: outer tank tank deck cage construction is installed, outer tank tank deck skeleton is connected on inner canister the first band wallboard;
H, inner canister tank deck erection ﹠ lift: the inner canister tank deck connects with outer tank tank deck skeleton with suspension rod, uses built-in mast to promote the inner canister tank deck, after hoisting depth surpasses built-in mast height, carries out the assembling that the inner canister tank deck is not finished part-structure;
I, other tank shells of inner canister are installed: use mast and promote electric block with tank skin cylindrical shell in the upside-down method of hull-section construction assembling, and carry out synchronously annex and install and Welding Testing, after finishing interior tank skin cylindrical shell assembling, carry out the welding of interior tank skin cylindrical shell and interior tank bottom, remove inner canister assembling mast, after interior tank skin cylindrical shell and the big angle seam welding of interior tank bottom, finish the welding of the remaining inner canister bottom edge of interior tank bottom plate butt weld, finish again the shrinkage joint welding between margin plate and the center plate;
J, inner canister annex are installed: inner canister pore and annex, adapter, inner canister stiffening ring are installed;
K, outer tank shell are installed: outer tank shell adopts the fliping lifting method to install, lifting pole is connected and fixed with interior tank skin by pull bar, outer tank skin annex is installed synchronously, after outer tank skin cylindrical shell assembling is finished, weld outer tank skin cylindrical shell and the big angle seam welding of outer tank bottom, and remove outer tank skin assembling lifting pole and technique packing;
L, outer tank tank deck plate are laid: remove outer tank tank deck skeleton with the temporary supporting of interior tank skin, as the one-shot job platform, use crane to lay outer tank deck skin panel with the inner canister tank deck;
M, test and adiabatic construction: carry out the test of 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-walled storage tank inner canister band; when outside tank bottom installation and interior tank bottom are installed; adjacent center plate lap weld is adopted consumable electrode CO2 gas shield welding method, and the welding employing welder of opposite side listrium outer most edge 300mm position butt weld evenly distributes, the method for symmetrical welding.
The outer tank deck lifting installation method of above-mentioned double-walled storage tank inner canister band when carrying out the installation of outer tank tank deck skeleton, uses temporary supporting that outer tank tank deck skeleton is connected on inner canister the first band wallboard.
The outer tank deck lifting installation method of above-mentioned double-walled storage tank inner canister band, when carrying out inner canister tank deck erection ﹠ lift, the inner canister tank deck connects with outer tank tank deck skeleton with suspension rod, forms inner canister tank deck, inner canister first with the assembly of wallboard and outer tank tank deck skeleton, described assembly and the lifting of inner canister cylindrical body synchronous.
The outer tank deck lifting installation method of above-mentioned double-walled storage tank inner canister band, when carrying out the assembling of inner canister and outer tank shell, each all installs packing with the inboard of wallboard, after finishing interior tank skin cylindrical shell and interior tank bottom Welding Testing the packing of interior tank shell is removed, after finishing last band wallboard installation of outer tank, remove outer tank shell packing.
Outer tank adopts flip chip technology in the present invention, and is safe and reliable, and efficient is high; On the ground construction that inner canister tank deck of the present invention is laid and major part is welded has reduced amount of high-altitude operation; Outer tank tank deck skeleton of the present invention is installed on inner canister the first band wallboard, forms tank deck assembly Synchronous lifting with the inner canister tank deck, and installation procedure is simplified, and has shortened the construction period; Outside tank body Construction Mode of the present invention is rear first, improved operating condition, working security improves greatly.In a word, the present invention makes double-walled storage tank installation procedure simplify, can significantly reduce amount of high-altitude operation, has not only improved operating efficiency, has shortened the construction period, and guaranteed operating personnel's safety, has embodied the construction concept of hommization.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is double-walled tank structure schematic diagram;
Fig. 2 is top view at the bottom of the outer tank tank;
Fig. 3 is top view at the bottom of the inner canister tank;
Fig. 4 is outer tank tank deck temporary supporting installation drawing;
Fig. 5 is A place structure enlarged drawing among Fig. 4;
Fig. 6 is that the tank deck assembly promotes schematic diagram;
Fig. 7 is that the 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.
Each list of reference numerals is among the figure: 1, the outer tank tank deck, 2, outer tank skin cylindrical shell, 2-1, outer tank the first band wallboard, 2-2, other wallboards of outer tank, 3, the outer tank stiffening ring, 4, the 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, the inner canister stiffening ring, 9, interior tank skin cylindrical shell, 9-1, inner canister the first band wallboard, 9-2, other wallboards of inner canister, 10, the inner canister tank deck, 11, suspension rod, 12, temporary supporting, 13, wire rope, 14, the inner canister tank deck promotes suspension centre, 15, promote cucurbit, 16, hanger, 17, packing, 18, buttress, 19, mast, 20, lifting pole, 21, pull bar.
The specific embodiment
Referring to Fig. 1, the double-walled storage tank is made of inner and outer tank, is provided with heat insulation layer 7 within it between the outer tank.Double-walled 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, the inner canister tank deck 10 of flat ceiling structure is set at interior tank skin cylindrical shell 9 tops, and tank skin cylindrical shell 2 tops arrange the outer tank tank deck 1 of domes outside.This double-walled storage tank inner canister tank deck 10 is suspension type, is suspended on the outer tank tank deck 1 by suspension rod 11; Outer tank tank deck 1 adopts shaped steel to do skeleton, lays the top skin panel in the parietal bone frame outside.
Referring to Fig. 2～Figure 10, the present invention is the outer tank deck lifting installation method of double-walled storage tank inner canister band, at first carrying out the basis checks and accepts and processes, carry out the construction of inside and outside tank bottom and middle heat insulation layer thereof, finishing interior tank bottom 6 layings, inner canister tank deck 10 and outer tank tank deck 1 skeleton installs again, and with inner canister the first band wallboard 9-1 composition assembly, outer tank band wallboard and outer tank top board in secondly installing are finished heat insulation layer 7 constructions between interior outer tank at last.
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 basis mounting plane mark outer tank bottom 5 the location dimension line are installed.
B, outer tank bottom 5 are installed
ⅰ, tank bottom 5 soffits are by designing requirement brushing anticorrosive paint outside;
ⅱ, outer tank bottom 5 is laid, tank bottom center plate 5-1 outside outwards lay at the center at first, adjacent outer tank bottom center plate lap weld 5-4 adopts consumable electrode CO2 gas shield welding method, then lay outer tank bottom edge plate 5-2, when externally tank bottom margin plate 5-2 welds, at first ecto-entad welds the outer tank bottom edge plate butt weld 5-3 at margin plate outer most edge 300mm position, the welding of this butt weld adopts the welder evenly to distribute, the method of symmetrical welding, then finish the welding of remaining margin plate butt weld 5-3, carry out at last the welding of shrinkage joint between outer tank bottom edge plate 5-2 and the outer tank bottom center plate 5-1, finish outer tank bottom 5 and lay;
ⅲ, carry out outer tank bottom 5 nondestructive testings and vacuum leakage test.
C, tank bottom heat insulation layer arrange
ⅰ, lay concrete on the tank bottom outside;
Spread waterproofing course after ⅱ, the levelling, and foam glass brick is installed and is laid the dry sand leveling layer.
D, interior tank bottom 6 are installed
ⅰ, interior tank bottom 6 are laid, and elder generation is tank bottom center plate 6-1 in outwards lay at the center, and adjacent interior tank bottom center plate lap weld 6-4 adopts consumable electrode CO2 gas shield welding method, then lays 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 evenly distributes, the method for symmetrical welding, and the welding of inner canister bottom edge plate butt weld 6-3 remainder is carried out after the inner canister bottom ring wall plate is with the bottom edge board welding;
ⅲ, interior tank bottom center plate 6-1 assembling and welding method with outer tank at the bottom of center plate consistent, center plate carries out after all welding is finished until bottom edge board 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 at interior tank bottom 6, built-in lifting mast 19 positions and the edge ring flat-plate, finish the assembling of inner canister top board remainder on interior tank bottom;
ⅱ, assembly welding inner canister tank deck 10, inner canister top board girth sheets are installed according to outer tank tank deck 1 frame position location, guarantee that inner canister top board girth sheets upper hanger connecting hole is with suspension rod 11 correspondences.
F, inner canister the first band wallboard 9-1 install
When ⅰ, installation inner canister the first band wallboard (counting from interior tank deck) 9-1, on interior tank bottom 6 margin plates, the buttress 18 of uniform placement 30-40 high 60mm along the circumferential direction, mark tank body interior diameter assembling circumference at buttress after buttress 18 levellings, assembling is installed synchronously with mast 19, built-in assembling packing 17 is installed;
ⅱ, according to the good position of material cutting plan mark, the lifting of checking the number, group are adjusted weld gap to inner canister the first band wallboard 9-1 with jig, spot welding is fixed;
ⅲ, by the requirement of welding procedure, carry out the welding of tank skin longitudinal seam, and in its outside inner canister stiffening ring 8 be installed.
G, outer tank tank deck 1 skeleton are installed
ⅰ, arrange the assembling vault falsework;
ⅱ, assembling longitudinal rib, hoop muscle;
ⅲ, outer tank vault construction and inner canister first are with the installation of temporary supporting 12 between wallboard 9-1, every vault beam is installed a temporary supporting 12, calculate its length by Design Requirement Drawing, temporary supporting 12 should adopt the intermittent weld mode to weld with the first band wallboard place inner canister stiffening ring 8.
H, interior tank deck erection ﹠ lift
Use built-in mast 19 and wire rope 13 to promote inner canister tank deck 10, the inner canister top board promotes suspension centre 14 and axially is evenly arranged along inner canister tank deck 10, inner canister tank deck 10 usefulness suspension rods 11 connect with outer tank tank deck 1 skeleton, after interior tank body assembled height surpassed built-in mast 19 height, assembling inner canister tank deck 10 was not finished part.
I, other wallboards of inner canister 9-2 install
ⅰ, use promote mast 19 and promote cucurbit 15 adopts the interior tank skin cylindrical shell 9 of upside-down methods of hull-section construction assembling, and carries out synchronously annex and install and Welding Testing;
Tank skin cylindrical shell 9 and interior tank bottom 6 weld seams in ⅱ, the welding, in interior tank skin cylindrical shell 9 and interior tank bottom 6 big angle seam welding, and remove inner canister and assemble with mast 19 and packing 17, finish the welding of interior tank bottom 6 remaining inner canister bottom edge plate butt weld 6-3, finish again the shrinkage joint welding between margin plate and the center plate.
J, inner canister annex are installed
The annexes such as inner canister pore and annex, adapter, anchoring piece are installed;
K, outer tank shell are installed
ⅰ, outer tank shell adopt the fliping lifting methods to install by lifting pole 20 and lifting cucurbit 15, outside on tank bottom 5 margin plates, the buttress 18 of uniform placement 30-40 high 60mm along the circumferential direction, mark tank body interior diameter assembling circumference at buttress after the buttress 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 installed synchronously;
ⅱ, weld seam nondestructive testing intert to be carried out.
The assembling of l, tank deck
After ⅰ, outside tank skin cylindrical shell 2 assemblings, carry out the assembling of tank deck, remove outer tank skin cylindrical shell 2 assembling lifting pole 20 and packings 17;
ⅱ, on the vault beam tank deck skin panel outside the symmetrical laying, remove outer tank parietal bone frame with the temporary supporting 12 of 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 7 constructions of tank internal insulation after qualified.
Claims (5)
1. the outer tank deck lifting installation method of a double-walled storage tank inner canister band is characterized in that construction sequence is as follows:
A, basis are checked and accepted and are processed: check the foundation structure size, mark the location dimension line is installed, carry out built-in fitting position detection;
B, outer tank bottom (5) install: tank bottom center plate (5-1) outside outwards lay the base center at first, then lay outer tank bottom edge plate (5-2), when externally tank bottom margin plate (5-2) welds, the at first outer tank bottom edge plate butt weld (5-3) at ecto-entad welding margin plate outer most edge 300mm position, then finish the welding of remaining margin plate butt weld, carry out at last the welding of shrinkage joint between margin plate and the center plate;
Isolation layer construction at the bottom of c, the tank: require to carry out laying and the cast of isolation layer at the bottom of the tank according to construction drawing;
D, interior tank bottom (6) install: tank bottom center plate (6-1) in outwards lay at the center at first, then lay inner canister bottom edge plate (6-2), only the internally inner canister bottom edge plate butt weld (6-3) at tank bottom margin plate outer most edge 300mm position welding;
E, inner canister tank deck (10) are laid: inner canister top board (10) is laid at interior tank bottom (6), except upper built-in lifting mast (19) position of interior tank bottom (6) and edge ring flat-plate, finishes the assembling of inner canister tank deck (10) remainder;
F, inner canister the first band wallboard (9-1) installation: inner canister is installed from upper terminal number the first band wallboard (9-1), assembling mast (19) is installed;
G, outer tank tank deck (1) skeleton are installed: outer tank tank deck (1) cage construction is installed, outer tank tank deck (10) skeleton is connected on inner canister the first band wallboard (9-1);
H, inner canister tank deck (10) erection ﹠ lift: inner canister tank deck (10) connects with outer tank tank deck skeleton with suspension rod (11), use built-in mast (19) to promote inner canister tank deck (10), after hoisting depth surpasses built-in mast (19) height, carry out the assembling that inner canister tank deck (10) is not finished 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 the upside-down method of hull-section construction assembling, and carry out synchronously annex and install and Welding Testing, after finishing interior tank skin cylindrical shell (9) assembling, carry out interior tank skin cylindrical shell (9) and interior tank bottom (6) welding, remove inner canister assembling mast (19), after interior tank skin cylindrical shell (9) and interior tank bottom (6) big angle seam welding, finish the welding of interior tank bottom (6) remaining inner canister bottom edge plate butt weld (6-3), finish again the shrinkage joint welding between margin plate and the center plate;
J, inner canister annex are installed: inner canister pore and annex, adapter, inner canister stiffening ring (8) are installed;
K, outer tank shell are installed: outer tank shell adopts the 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 installed synchronously, after outer tank skin cylindrical shell (2) assembling is finished, weld outer tank skin cylindrical shell (2) and outer tank bottom (5) big angle seam welding, and remove outer tank skin assembling lifting pole (20) and technique packing (17);
L, outer tank tank deck plate are laid: remove outer tank tank deck skeleton with the temporary supporting (12) of interior tank skin, as the one-shot job platform, use crane to lay outer tank deck skin panel with inner canister tank deck (10);
M, test and adiabatic construction: carry out the test of interior outer tank according to designing requirement, carry out tank internal insulation (7) construction after qualified.
2. the outer tank deck lifting installation method of a kind of double-walled storage tank inner canister band according to claim 1; it is characterized in that; when outside tank bottom (5) installation and interior tank bottom (6) are installed; adjacent center plate lap weld is adopted consumable electrode CO2 gas shield welding method, and the welding employing welder of opposite side listrium outer most edge 300mm position butt weld evenly distributes, the method for symmetrical welding.
3. the outer tank deck lifting installation method of a kind of double-walled storage tank inner canister band according to claim 2, it is characterized in that, when carrying out the installation of outer tank tank deck (1) skeleton, use temporary supporting (12) that outer tank tank deck (1) skeleton is connected on inner canister the first band wallboard (9-1).
4. the outer tank deck lifting installation method of a kind of double-walled storage tank inner canister band according to claim 3, it is characterized in that, when carrying out inner canister tank deck (10) erection ﹠ lift, inner canister tank deck (10) connects with outer tank tank deck (1) skeleton with suspension rod (11), form assembly, described assembly and interior tank body (9-2) Synchronous lifting of inner canister tank deck (10), inner canister the first band wallboard (9-1) and outer tank tank deck (1) skeleton.
5. the outer tank deck lifting installation method of a kind of double-walled storage tank inner canister band according to claim 4, it is characterized in that, when carrying out the assembling of inner canister and outer tank shell, each all installs packing with the inboard of wallboard, after finishing interior tank skin cylindrical shell and interior tank bottom Welding Testing the packing of interior tank shell is removed, after finishing last band wallboard installation of outer tank, remove outer tank shell packing.
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