CN101858161B - Construction method of low-temperature double-wall storage tanks - Google Patents
Construction method of low-temperature double-wall storage tanks Download PDFInfo
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- CN101858161B CN101858161B CN2010102251612A CN201010225161A CN101858161B CN 101858161 B CN101858161 B CN 101858161B CN 2010102251612 A CN2010102251612 A CN 2010102251612A CN 201010225161 A CN201010225161 A CN 201010225161A CN 101858161 B CN101858161 B CN 101858161B
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Abstract
The invention relates to an installation method of storage tanks in building engineering construction, in particular to a construction method of large and medium low-temperature double-wall storage tanks. A positive installation method is adopted; basic treatment and installation are firstly carried out; an outer tank of a tank body is installed; then an inner tank is installed; and finally, the basic treatment of the inner tank is carried out. The method concretely comprises the following steps of: A, basic treatment: firstly checking for the size of the installation direction of a basic heater pipe; then installing the basic heater pipe; determining the positions of basic surrounding sizing blocks; B, installation of the outer tank; C, installation of the inner tank; and D, execution of a final gas-tightness test between the inner tank and the outer tank: installing an inner top heat preservation layer and filling perlite in an interlayer after the gas-tightness test is qualified. By adopting the positive installation method and practical waterproof measures, the engineering quality achieves corresponding technical standard requirements. The construction technology and the construction method have large popularization and application prospects in national markets.
Description
Technical field
The present invention relates to the mounting method of basin in the building engineering construction, refer in particular to a kind of big-and-middle-sized construction method of low-temperature double-wall storage tanks.
Background technology
Low-temperature double-wall storage tanks is to utilize cryogenics with propane and the normal pressure storage at low temperatures of butane liquid, and the advantage of this jar is that storage capacity is big, can save great amount of investment, and is safe in utilization, makes mounting process and uncomplicated, is a kind of developing direction in the world.
Summary of the invention
The objective of the invention is to improve and innovate, a kind of construction method of low-temperature double-wall storage tanks is provided to the shortcoming that exists in the background technology and problem.
The present invention adopts upright method of hull section construction, does the processing and the installation on basis earlier, and the outer jar of tank body is installed again, secondly installs interior jar, carries out the processing of interior tank base at last, specifically may further comprise the steps:
A, based process: at first check basic heater tube installation direction size, basic heater tube is installed again, and confirm the position of parallels all around, basis, specific as follows:
A, be reference line with basic heater tube installation direction top, each of inspection stone bolt, stainless steel anchor band be size partly;
B, basic heater tube is installed, basic heater tube center and surface of base distance 278 mm parallelly on 90 ° of-270 ° of directions are uniformly distributed with 28; At first in the basis, fill out the husky heater tube saliva mean place that arrives, heater tube is installed, joint area is done preservative treatment; The inspection backguy; Continue the filling sand, around center position, complete, in foundation ring girder, fill up by the 1:100 gradient;
Parallels is placed at jar margin plate periphery, basic one all about 288 blocks of parallels, the about 10mm of position isolated edge plate in c, definite basic position of parallels all around; Survey level and cement are done pier, put parallels then, use the level gauge conjunction measuring simultaneously, and clump smears the form of tiltedly draping over one's shoulders.
The installation of B, outer jar:
A, outer tank bottom are installed, and at first laying, welding edge listrium and center plate to the base plate line, are installed outer tank shell then; Specific as follows:
(1) margin plate is laid, is welded: begin to lay margin plate from start position, and overlap joint 25.4mm, inspection radius R=11674mm adjusts back spot welding, first spot welding stainless steel anchor band position, spot welding overlapping the slot again, welding then, welding sequence is with the electric welding order;
(2) center plate is laid, welded: begin from center line, spread in order on past two, both sides, and two boards lap-joint sharping after the inspection size, blocks with jig;
(3) base plate line: the circumference of outer jar circumference, interior jar of cement layer position, the end, interior jar of heat insulating block basis seat, inspection usefulness confirms, marks that also mark is clear; Jar outside assembling is earlier put upward alignment code on every side, is marked every Board position simultaneously for outer jar;
B, outer tank shell are installed, and at first rule interior top is installed, and setting-out on the internal head cover plate again marks outer roof frame pattern and each several part size positions interior top is installed, and lifts top cover at last; Specific as follows:
(1) outer tank shell is installed: begin to lift first block of plate from start position, and messenger wire inspection verticality, the plate two ends are supported with angle bar, and spot welding is fixed, and block-by-block is installed in order, reserves door direction simultaneously; After the first floor wallboard encloses well, adjust the longitudinal joint angularity earlier, spot welding, every longitudinal joint after all longitudinal joints have been adjusted, begins to adjust tank skin verticality and ovality with 3 gardens of time point arc plate again, adopts the method that supports to adjust successively; Second layer wallboard is with back of the body thick stick anchor clamps and adopt method for supporting centering, adjustment, and spot welding is fixed, and the installation of each laminate is later on adjusted with the method for piston ring and cable wind rope; After installing the 3rd layer of wallboard, in jar, assemble top cover;
(2) installation of top cover comprises:
1) top installation in: elder generation rules on the tank bottom outside, setting-out, confirms position, direction and each part key dimension position of inside and outside top cover, adapter; Set up the temporary platform shelf, flat with level gauge water detection, tank deck cover plate and welding in laying;
2) install on outer top: setting-out on the internal head cover plate; Mark outer roof frame pattern and each several part size positions; The seat angle that prop and parietal bone frame are used is installed, and all definite seat angles are on the absolute altitude, and cycle beam and top supporting beam, middle collar tie beam are installed on prop; Roof sheet is installed, and the shop is outer earlier, repaves internal layer, and the plate in the middle of the shop blocks with jig at last, welding;
3) top cover lifting: compression ring is installed earlier, the orientation angle plate of spot welding compression ring on ground earlier, 3 of every plate points arrive outer tank shell highest point with crane lifting, and are right with the special mould clamp group; Top cover punches, and 4 hangers and reinforcing are installed, and lifting puts in place, and is right with the compression ring group;
C, give outer jar to open the gate, stay two boards to do interim gate on jar first and second layer wallboard outside during installation, a jar construction is used in doing.
The installation of C, interior jar:
The installation of a, interior tank base, setting-out on the tank bottom outside, jar margin plate position and size in confirming; And with parallels centering, levelling, install successively by the figure paper size, after the inspection size is errorless; Every is blocked the location by location angle steel spot welding again, treat that inwall installs after, with colloidality cement back-grouting;
B, shop margin plate, the butt joint double welding, every Board position is marked, the point location numeral to the margin plate line in qualified back;
C, wallboard are installed, and group installs interior jar big door frame to behind the 1-3 layer wallboard earlier; Fixing; And interim gate wallboard removed, hangs out, the gate is held successfully, and each layer wallboard installed and required the same with outer jar later on; Up to laminate second from the bottom, last one deck wallboard need connect secondary bar when installing and utilize special hanger colligation lifting;
Install at d, the interior jar of end, and at first casting one deck leveling course in the carrier block collar tie beam is spread the bottoming of one deck pitch more in the above, and it is two-layer to repave foam glass brick, waters one deck pitch between every layer, and fill with microglass fiber in the gap between collar tie beam and the foam glass brick; After accomplishing above-mentioned work, water one deck pitch again, repave the compacting of one deck sand, just can spread interior tank bottom center plate, its installation requirement is the same with outer tank bottom;
E, base plate have welded through after the assay was approved, with interior jar of gate hoisted in position, weld then, through after the assay was approved, remove interim doorframe; And internally jar carries out the hydrostatic test, an outer jar of opening gate is resetted welding after qualified.
D, carry out air tight test between inside and outside jar at last, after air tight test was qualified, the installation of closure insulation and interlayer were filled out perlite and are got final product in carrying out.
Technological principle of the present invention and job practices main feature:
Process using upright method of hull section construction of the present invention, promptly elder generation installs outer jar, and next installs top cover, then jar in installing.
, adopt upright method of hull section construction: outer jar of construction earlier and top cover, reason are that interior tank base and heat insulating material must waterproof;
2, inside and outside tank skin is opened the gate and just can be constructed;
3, interior top ends of cans is flat outstanding top, with interior tank skin welding, does not adopt fluid sealant to shut;
4, all manholes and adapter on the basin, only with interior tank skin welding, mounting sleeve in the adapter, sleeve pipe and outer tank skin welding, dress insulation filler between adapter and sleeve pipe.
Advantage of the present invention and beneficial effect:
The present invention adopts upright method of hull section construction, takes practicable waterproof measure, and workmanship has reached the corresponding technical standard requirement, and this construction technology and worker's method marketing application prospect at home are very big.
Description of drawings
Fig. 1 is a process chart of the present invention.
Fig. 2 is a double walled tank structural representation of the present invention.
Fig. 3 is the inside and outside cap structure scheme of installation of the present invention.
Fig. 4 is base plate welding sequence figure of the present invention.
Fig. 5 installs and welding sequence figure for wallboard of the present invention.
Fig. 6 is the outer top ends of cans welding sequence figure of the present invention.
The figure number explanation:
Among Fig. 21, interior closure insulation, 2, interior outstanding top, 3, perlite, 4, fibrous glass is cotton; 5, interior tank bottom, 6, outer tank bottom, 7, interior jar of carrier block, 8, foundation ring girder; 9, Wai Ding, 10, compression ring, 11, outer tank skin, 12, interior tank skin; 13, take over 14, sand, 15, heater, 16, spray coagulates pipe;
Among Fig. 3 17, outer tank shell, 18, interim seat angle, 19, interior top margin listrium, 20, interior tank shell, 21, the basis; 22, top cover lacing wire, 23, outer lamina tecti, 24, the top supporting beam, 25, the supporting collar tie beam; 26, internal head cover plate, 27, outer tank bottom, 28, interior outstanding top board collar tie beam, 29, prop;
Among Fig. 5 30, the gate;
Among Fig. 6 31, lamina tecti.
The specific embodiment
Specific embodiment:
1, based process.
1) above basic heater tube installation direction, just 90 ° of-270 ° of directions as reference line, are checked each part size of stone bolt, stainless steel anchor band, should meet the drawing standard-required.56 of stone bolt (erection support is used for fixing outer jar); Verticality inspection: be no more than 10 mm in 1000 mm; 56 of stainless steel anchors (through stainless steel band plate and the welding of interior tank skin), fixing interior jar usefulness, anchor length franchise is to be no more than 3.2 mm in 305 mm; Spacing franchise ± 6mm, diameter franchise ± 12mm.
2) basic heater tube is installed:
Basis heater tube center and surface of base distance 278 mm parallelly on 90 ° of-270 ° of directions are uniformly distributed with 28, at first in the basis, fill out the husky heater tube saliva mean place that arrives; Heater tube is installed; The attention joint area should be done preservative treatment, after the backguy inspection meets the requirements, continues the filling sand; Around center position, complete, in foundation ring girder, fill up by the 1:100 gradient.During filling, note rainproof.
3) confirm the position of parallels all around, basis:
In order to guarantee wallboard verticality and double wall gap, place parallels at jar margin plate periphery during design, use to make levelling base plate and wallboard.Basis one all about 288 blocks of parallels, isolated edge plate about 10mm in position is forbidden to expose, the inaccurate taper liner iron that adopts.The survey level is a benchmark with stainless steel anchor band plate, than about its slightly high 1-2mm or flat, does not allow low; After measuring the height that parallels needs, and cement (cement special) does pier, puts a parallels (110 * 75 * 10mm) on then; Level gauge conjunction measuring, clump smear the form of tiltedly draping over one's shoulders.
2, outer tank bottom is installed.
1) margin plate is laid, is welded:
Begin to lay margin plate from the start position of drawing regulation, overlap joint 25.4mm, inspection radius R=11674mm (considering that the welding contraction needs suitably to amplify); Adjust back spot welding, first spot welding stainless steel anchor band position, spot welding overlapping the slot again; Welding then, welding sequence is with the electric welding order.
2) center plate is laid, is welded:
Begin from center line, spread in order on past two, both sides, notes lapping direction, and two boards lap-joint sharping after dimensional gaughing is errorless, blocks with jig.During welding, weld which bar seam and promptly order which bar seam, jig is torn on the side weld limit open.
3) base plate line:
Outer jar of garden week, interior jar of cement layer position, the end, interior jar of heat insulating block basis seat, inspection usefulness confirm in garden week good after, mark, mark is clear.Jar outside assembling is earlier put upward alignment code on every side, is marked every Board position simultaneously for outer jar.
4) outer tank shell is installed:
Begin to lift first block of plate (start position needs spot welding, in order to avoid move) from the drawing requirement start position, messenger wire inspection verticality, the plate two ends are supported with angle bar, and spot welding is fixed, and block-by-block is installed in order, notes reserving door direction simultaneously.
After the first floor wallboard encloses well, adjust the longitudinal joint angularity earlier, spot welding, every longitudinal joint is with 3 gardens of time point arc plate.After all longitudinal joints have been adjusted, begin to adjust tank skin verticality and ovality again, adopt the method that supports to adjust successively.
Second layer wallboard can be used back of the body thick stick anchor clamps and adopt method for supporting centering, adjustment, and spot welding is fixed, and the installation of each laminate later on can only be adjusted with the method for piston ring and cable wind rope.
Here it should be noted: after the 3rd layer of wallboard installs, reach 8.55 m highly, at this moment must in jar, assemble top cover earlier, increasingly high with squab panel, all can bring difficulty to group to reaching the handling material.
3, the installation of top cover.
Because outer jar is designed to vault construction, interior jar is outstanding top (flat-top) structure, and the centre connects with square steel bar 15 * 15mm (93); And a jar diameter reaches more than 20 meter; Middle no upright supports installs lifting simultaneously so consider inside and outside top, simultaneously one of annexes such as the manhole on the inside and outside top, adapter, platform aisle is installed; Avoid to set up scaffold in the future, install to the high-altitude and bring difficulty.
1) install on the top in:
Elder generation rules on the tank bottom outside, setting-out, confirms position, direction and each part key dimension position of inside and outside top cover, adapter.
Set up the temporary platform shelf; Shelf is that the angle steel of 1220 mm is processed with 80 * 80 * 60mm, length; Flat with level gauge water detection, temporary platform shelf beam must guarantee that all overlapping the slot all drop on the beam on the inside ceiling panel, in order to avoid welding deformation; Shelf must be firm, in order to avoid inside and outside roof pressure collapses in the above.
Tank deck cover plate (flat-top) welding in laying, the same base plate of welding requirements notes preventing distortion.
2) install on outer top:
Setting-out on the internal head cover plate; Mark outer roof frame pattern and each several part size positions; The seat angle that prop and parietal bone frame are used is installed, and all definite seat angles are on the absolute altitude, and cycle beam and top supporting beam (rafter), middle collar tie beam are installed on prop.When roof sheet is installed, should spread skin earlier, repave internal layer, the plate in the middle of the shop blocks with jig at last, welding, and the roof construction pattern is specifically as shown in Figure 3.
3) top cover lifting:
Because top cover is through compression ring and wallboard assembly welding together, so installation compression ring earlier.The first orientation angle plate of spot welding compression ring on ground, 3 of every plate points utilize crane lifting to arrive outer tank shell highest point, and are right with the special mould clamp group.
Top cover punches, and 4 hangers is installed, and is reinforced, and utilizes two 150t crane liftings to put in place, and is right with the compression ring group.Here be noted that especially the inside, outer top have 48 blocks of plates (150 * 75 * 9.6mm), connect with parietal bone frame and compression ring, mainly be stressed by it, this gusset piece must be after welding, crane can loose hook.
4, outer jar is opened the gate.
There are 2 blocks of plates to do interim gate on jar first and second layer wallboard outward and use, do not weld earlier, only spot welding when installation and adjustment wallboard, (interior jar correspondence position has 2 blocks of plates too), this reserves the construction usefulness that door is beneficial to interior jar.
Big door frame is processed with the angle steel of 100 * 100 * 10mm, is welded on the wallboard, will remove as the wallboard that the gate is used then, just can carry out interior jar construction.
5, install for interior jar.
1) installation of interior tank base:
Pearl sand concrete carrier block position and size under the interior jar margin plate confirmed in setting-out on the tank bottom outside, totally 56 on this carrier block one circle; Every with 4 groups of parallels centerings, levelling; Install successively by the figure paper size, after the inspection size was errorless, every was blocked the location by 4 location angle steel spot welding again; After treating that inwall installs, with colloidality cement back-grouting.
In the jar wrong path of dispatching workers to do on-site repairs, advance a jar operation in order to crane, the thick steel plate of position shop one deck d=18 mm of jar inherent crane walking is in case outer tank bottom is out of shape.
2) shop margin plate, totally 16 of margin plates because designing requirement butt joint double welding, per 2 butt joints earlier, weld the front after, turn-over weldering reverse side again, then with eight bulk groups to becoming a circle, weld positive back bed hedgehopping, weld in the overhead position and weld reverse side, detect a flaw after setting level.After qualified,, mark every Board position, the point location numeral to the margin plate line.
3) wallboard is installed:
Interior jar is eight layers of wallboard altogether, utilizes crane and bracket that material is transported in the jar.Group to the 1st ~ 3 layer of wallboard after, interior jar big door frame is installed, fixing.Interim gate wallboard is removed, hung out, and the gate is held successfully.Crane and material are all from gate turnover between inside and outside jar, and each layer wallboard installation later on requires the same with outer jar, up to the 7th laminate.
Because the crane boom is run into interior tank deck and can't be hung and put in place, need connect secondary bar and utilize special hanger colligation lifting when the 8th layer of wallboard installed.
4) install at jar end in:
When install at jar end in carrying out, in pearl sand concrete carrier block collar tie beam, casting one deck 100mm high concrete leveling course.After waiting to have maintained, spread the bottoming of one deck pitch in the above, repave 2 layers of foam glass bricks, water one deck pitch between every layer, fill with microglass fiber in the gap between collar tie beam and the foam glass brick.
After accomplishing above-mentioned work, water one deck pitch, repave the compacting of one deck sand, just can spread interior tank bottom center plate, its installation requirement is the same with outer tank bottom.
5) base plate has welded through after the assay was approved, can interior jar of gate hoisted in position be welded then, through after the assay was approved, removes interim doorframe.
6, interior jar of hydrostatic test.
Give interior jar of water-filling, jar hydrostatic test in carrying out is carried out foundation settlement respectively and is measured, and carries out record at slack tank, 1/4,1/2, when 3/4 liquid level is high.
7, the interior jar hydrostatic test qualified after, an outer jar of opening gate resetted, weld, through after the assay was approved, can carry out air tight test between inside and outside jar, behind specified testing pressure, use the suds inspection not have leakage, do not have distortion, no abnormal sound is qualified.
8, air tight test qualified after, the installation and the interlayer of closure insulation filled out perlite in carrying out, and be at first cotton at interior tank skin outsourcing one deck fibrous glass, colligation back is well down loaded perlite with special equipment from the top.The layering filling, the layering tamping, until arriving the top, attention must be tamped, and pearl sand must not make moist, and is preferably under the calm situation to construct.
Main welding sequence and the requirement partly of the present invention:
1, base plate is welded with following several problem and notes:
All T-shaped mouths on the base plate, every limit stays 150 ~ 200mm not weld, and treats that the whole weld seams of base plate have welded, and the last welding in cooling back is with anti-deformation.
The welding of base plate and Wall board angle weld seam should can be carried out after installing the 3rd layer of wallboard and the 1st ~ 2 layer of whole weldering of wallboard weld seam at least.
After accomplishing above-mentioned welding, can carry out the welding (the dismountable some welded fixture in side weld limit) of girth joint between margin plate and center plate.
2, the welding sequence of the installation of wallboard and wallboard is as shown in Figure 5, and every weld seam all welds the outside earlier, and the back weldering is inboard.
3, the welding of top cover, the welding of interior jar of flat-top, collar tie beam is strengthened in weldering earlier, and partly welding requirements is the same with the base plate welding for all the other.Outer jar of vault welding sequence is as shown in Figure 6.
Plant of the present invention:
Four double walled tanks are constructed simultaneously, and its main material is seen application example, and main construction equipment is as shown in the table.
| Sequence number | Title | Specification or model | Unit | Quantity | Remarks | |
| 1 | Electric welding machine | 300 | | 12 | ? | |
| 2 | Electric welding machine | 500 | | 12 | ? | |
| 3 | Vacuum pump | ? | | 1 | ? | |
| 4 | Air compressor machine | 0.6 | Platform | 2 | ? | |
| 5 | Drying baker | 500 | Platform | 2 | ? | |
| 6 | Thermostatic drying chamber | 300 | Platform | 2 | ? | |
| 7 | | 150t | Platform | 2 | ? | |
| 8 | Crane | 45t，30t， | Platform | 3 | Each 1 | |
| 9 | Abrasive machine | Φ100，Φ180 | Platform | 40 | ? | |
| 10 | Gas welding unit | ? | | 4 | ? | |
| 11 | Heat-preserving container | ? | Individual | 40 | ? | |
| 12 | Automobile | 40t. | Platform | 3 | ? | |
| 13 | The gouge instrument | ? | | 8 | ? | |
| 14 | Flat automatic gas cutting machine | ? | | 2 | ? | |
| 15 | Level gauge | ? | | 1 | ? | |
| 16 | | 30t | Individual | 1 | ? | |
| 17 | | 10t | Individual | 2 | ? |
Quality control of the present invention:
1, quality specifications: standards should be strictly carried out in the construction of low temperature double walled tank:
API620 " design and construction of large-scale welding low-pressure tank " and " low pressure double walled tank annex/replenish "; ASME the 9th volume " welding and soldering evaluation "; Double walled tank construction drawing and technical requirements.
2, under the normal quality managemant situation of construction, to strengthen the management at following each control point especially:
Inside and outside tank wall material must be pinpointed the problems by figure paper size and number order assembling, should in time report to owner and management company representative;
Each step operation of double walled tank construction, for example: the assembling of every circle wallboard, base plate is laid, and the perforate of adapter and installation etc. all must can be descended work together after owner and the signature of management company representative passed examination;
When the laying of carrying out base plate and top cover, welding, to note the strict welding program of carrying out especially, prevent distortion, vacuum test is answered close inspection;
In work progress, carry out rainproof waterproof work conscientiously, outer jar of the construction sequence elder generation assembly welding of jar, jar in the back assembly welding, its purpose is exactly to interior jar of rainproof waterproof problem, and it is to prohibit water that many materials are wherein arranged;
The ovality of inside and outside tank skin, verticality must strict controls, otherwise in will influence jar and the gap of installation of interior top and double wall;
The installation of taking over will be noted program, when being full of water for interior jar, can take over sleeve pipe and the welding of jar outward, and the sleeve pipe planted agent loads the insulation filler;
In interior jar work progress, note the heat insulating material of tank base in the protection, like foam glass brick etc., internally tank base pearl sand concrete carrier block down especially will be strengthened protecting especially, in order to avoid the high-altitude dropped object smashes;
Nondestructiving inspecting test carries out according to standard-requireds such as API620 and ASME, and the relevant personnel should be familiar with the corresponding techniques requirement.
3, labor organization: four double walled tanks are constructed simultaneously, cross-operation, and the labour organizes as shown in the table.
| Sequence number | Work post | Number | Working days | Work |
| 1 | | 20 | 360 | 7200 |
| 2 | The electric welder | 32 | 300 | 9600 |
| 3 | The | 2 | 300 | 600 |
| 4 | Play | 4 | 330 | 1320 |
| 5 | The | 2 | 330 | 660 |
| 6 | | 1 | 180 | 180 |
| 7 | | 4 | 210 | 840 |
| 8 | | 16 | 330 | 5280 |
| Add up to | ? | 81 | ? | 25680 |
Explain: the following table number does not comprise administrative staff; Steel plate cutting, prefabricated responsible by over contract side.
Embodiment of the present invention only is the description that preferred implementation of the present invention is carried out; Be not that design of the present invention and scope are limited; Under the prerequisite that does not break away from design philosophy of the present invention; Engineers and technicians make technical scheme of the present invention in this area various modification and improvement all should fall into protection scope of the present invention.
Claims (1)
1. a construction method of low-temperature double-wall storage tanks is characterized in that adopting upright method of hull section construction, does the processing and the installation on basis earlier, and the outer jar of tank body is installed again, secondly installs interior jar, carries out the processing of interior tank base at last, specifically may further comprise the steps:
A, based process: at first check basic heater tube installation direction size, basic heater tube is installed again, and confirm the position of parallels all around, basis, specific as follows:
A, be reference line with basic heater tube installation direction top, each of inspection stone bolt, stainless steel anchor band be size partly;
B, basic heater tube is installed, basic heater tube center and surface of base distance 278 mm parallelly on 90 ° of-270 ° of directions are uniformly distributed with 28; At first in the basis, fill out the husky heater tube saliva mean place that arrives, heater tube is installed, joint area is done preservative treatment; The inspection backguy; Continue the filling sand, around center position, complete, in foundation ring girder, fill up by the 1:100 gradient;
Parallels is placed at jar margin plate periphery, basic one all about 288 blocks of parallels, the about 10mm of position isolated edge plate in c, definite basic position of parallels all around; Survey level and cement are done pier, put parallels then, use the level gauge conjunction measuring simultaneously, and clump smears the form of tiltedly draping over one's shoulders;
The installation of B, outer jar:
A, outer tank bottom are installed, and at first laying, welding edge listrium and center plate to the base plate line, are installed outer tank shell then; Specific as follows:
(1) margin plate is laid, is welded: begin to lay margin plate from start position, and overlap joint 25.4mm, inspection radius R=11674mm adjusts back spot welding, first spot welding stainless steel anchor band position, spot welding overlapping the slot again, welding then, welding sequence is with the electric welding order;
(2) center plate is laid, welded: begin from center line, spread in order on past two, both sides, and two boards lap-joint sharping after the inspection size, blocks with jig;
(3) base plate line: the circumference of outer jar circumference, interior jar of cement layer position, the end, interior jar of heat insulating block basis seat, inspection usefulness confirms, marks that also mark is clear; Jar outside assembling is earlier put upward alignment code on every side, is marked every Board position simultaneously for outer jar;
B, outer tank shell are installed, and at first rule interior top is installed, and setting-out on the internal head cover plate again marks outer roof frame pattern and each several part size positions interior top is installed, and lifts top cover at last; Specific as follows:
(1) outer tank shell is installed: begin to lift first block of plate from start position, and messenger wire inspection verticality, the plate two ends are supported with angle bar, and spot welding is fixed, and block-by-block is installed in order, reserves door direction simultaneously; After the first floor wallboard encloses well, adjust the longitudinal joint angularity earlier, spot welding, every longitudinal joint after all longitudinal joints have been adjusted, begins to adjust tank skin verticality and ovality with 3 gardens of time point arc plate again, adopts the method that supports to adjust successively; Second layer wallboard is with back of the body thick stick anchor clamps and adopt method for supporting centering, adjustment, and spot welding is fixed, and the installation of each laminate is later on adjusted with the method for piston ring and cable wind rope; After installing the 3rd layer of wallboard, in jar, assemble top cover;
(2) installation of top cover comprises:
1) top installation in: elder generation rules on the tank bottom outside, setting-out, confirms position, direction and each part key dimension position of inside and outside top cover, adapter; Set up the temporary platform shelf, flat with level gauge water detection, tank deck cover plate and welding in laying;
2) install on outer top: setting-out on the internal head cover plate; Mark outer roof frame pattern and each several part size positions; The seat angle that prop and parietal bone frame are used is installed, and all definite seat angles are on the absolute altitude, and cycle beam and top supporting beam, middle collar tie beam are installed on prop; Roof sheet is installed, and the shop is outer earlier, repaves internal layer, and the plate in the middle of the shop blocks with jig at last, welding;
3) top cover lifting: compression ring is installed earlier, the orientation angle plate of spot welding compression ring on ground earlier, 3 of every plate points arrive outer tank shell highest point with crane lifting, and are right with the special mould clamp group; Top cover punches, and 4 hangers and reinforcing are installed, and lifting puts in place, and is right with the compression ring group;
C, give outer jar to open the gate, stay two boards to do interim gate on jar first and second layer wallboard outside during installation, a jar construction is used in doing;
The installation of C, interior jar:
The installation of a, interior tank base, setting-out on the tank bottom outside, jar margin plate position and size in confirming; And with parallels centering, levelling, install successively by the figure paper size, after the inspection size is errorless; Every is blocked the location by location angle steel spot welding again, treat that inwall installs after, with colloidality cement back-grouting;
B, shop margin plate, the butt joint double welding, every Board position is marked, the point location numeral to the margin plate line in qualified back;
C, wallboard are installed, and group installs interior jar big door frame to behind the 1-3 layer wallboard earlier; Fixing; And interim gate wallboard removed, hangs out, the gate is held successfully, and each layer wallboard installed and required the same with outer jar later on; Up to laminate second from the bottom, last one deck wallboard need connect secondary bar when installing and utilize special hanger colligation lifting;
Install at d, the interior jar of end, and at first casting one deck leveling course in the carrier block collar tie beam is spread the bottoming of one deck pitch more in the above, and it is two-layer to repave foam glass brick, waters one deck pitch between every layer, and fill with microglass fiber in the gap between collar tie beam and the foam glass brick; After accomplishing above-mentioned work, water one deck pitch again, repave the compacting of one deck sand, just can spread interior tank bottom center plate, its installation requirement is the same with outer tank bottom;
E, base plate have welded through after the assay was approved, with interior jar of gate hoisted in position, weld then, through after the assay was approved, remove interim doorframe; And internally jar carries out the hydrostatic test, an outer jar of opening gate is resetted welding after qualified;
D, carry out air tight test between inside and outside jar at last, after air tight test was qualified, the installation of closure insulation and interlayer were filled out perlite and are got final product in carrying out.
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| CN102444308B (en) * | 2011-09-20 | 2013-12-18 | 中化二建集团有限公司 | Construction method of double-housing large-scale low-temperature storage tank |
| JP6127453B2 (en) * | 2012-11-06 | 2017-05-17 | 株式会社Ihi | Construction method of cylindrical tank |
| CN103015781B (en) * | 2012-12-05 | 2015-07-15 | 中国化学工程第十三建设有限公司 | Method for top lift installation of inner tank and outer tank of double-wall storage tank |
| CN103692095B (en) * | 2013-12-11 | 2016-08-17 | 中国化学工程第四建设有限公司 | Large-scale single disc-type External floating roof tank construction method of installation |
| CN104832755B (en) * | 2014-02-12 | 2018-02-16 | 五冶集团上海有限公司 | Benzene hydrogenation engineering horizontal tank, heat exchanger installation method |
| CN105569412A (en) * | 2016-01-05 | 2016-05-11 | 山东电力建设第三工程公司 | Method for manufacturing and mounting nuclear power desalting water tank |
| CN105971353A (en) * | 2016-05-25 | 2016-09-28 | 中冶天工集团天津有限公司 | Ground splicing and integral lifting method for steel beams at top of cylindrical steel storage tank |
| JP6914113B2 (en) * | 2017-06-22 | 2021-08-04 | 東京電力ホールディングス株式会社 | Welding method, tank construction method |
| CN110902178A (en) * | 2019-12-31 | 2020-03-24 | 浙江振申绝热科技股份有限公司 | Low-temperature storage device and installation method thereof |
| CN114509223B (en) * | 2021-12-29 | 2024-08-20 | 海洋石油工程股份有限公司 | Be applied to LNG jar inner wall board welding seam vacuum detection watertight fittings |
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| JP4238515B2 (en) * | 2002-03-12 | 2009-03-18 | 敏朗 関根 | Stirring method in methane fermentation water tank and water tank for breeding aquatic organisms such as methane bacteria |
| KR100644217B1 (en) * | 2006-04-20 | 2006-11-10 | 한국가스공사 | Lng storage tank having improved insulation structure and manufacturing method |
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