CN101858161A - 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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- CN101858161A CN101858161A CN 201010225161 CN201010225161A CN101858161A CN 101858161 A CN101858161 A CN 101858161A CN 201010225161 CN201010225161 CN 201010225161 CN 201010225161 A CN201010225161 A CN 201010225161A CN 101858161 A CN101858161 A CN 101858161A
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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 provides a kind of construction method of low-temperature double-wall storage tanks for the shortcoming that exists in the background technology and problem improvement and bring new ideas in addition.
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 determine the position of parallels all around, basis.
The installation of B, outer tank:
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;
B, outer tank shell are installed, and at first rule interior top is installed, and again setting-out on the internal head cover plate marks outer roof frame pattern and each several part size positions interior top is installed, and lifts at last top cover;
C, open the gate to outer tank, stay two boards to do interim gate at first and second layer of outer tank wallboard during installation, do the inner canister construction and use.
The installation of C, inner canister:
The installation of a, interior tank base, inner canister margin plate position and size are determined in outside setting-out on the tank bottom, 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 docking welding by both sides, qualified rear to the margin plate line, mark every Board position, the point location numeral;
C, wallboard are installed, organize earlier behind the 1-3 layer wallboard, the big door frame of inner canister is installed, fixing, and interim gate wallboard removed, hangs out, the gate is held successfully, and each layer wallboard installed and required the same with outer tank later on, until laminate second from the bottom, last one deck wallboard need connect secondary bar when installing and utilize special hanger colligation lifting;
Install at the bottom of d, the inner canister, at first casting one deck level course in the carrier block collar tie beam spreads 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 collar tie beam and foam glass brick gap are filled with microglass fiber; After finishing 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 inner canister gate hoisted in position, weld then, through after the assay was approved, remove interim doorframe; And inner canister carried out the water pressure test, outer tank opening gate is resetted welding after qualified.
D, carry out air-tight test between interior outer tank at last, after air-tight test is qualified, carries out the installation of interior closure insulation and interlayer and fill out perlite and get final product.
Technological principle of the present invention and job practices main feature:
Process using upright method of hull section construction of the present invention is namely installed earlier outer tank, and next installs top cover, then inner canister is being installed.
1, adopt upright method of hull section construction: the outer tank of constructing earlier and top cover, reason are that interior tank base and insulation 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 the welding of outer tank skin, 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 cotton, 5, interior tank bottom, 6, outer tank bottom, 7, interior jar 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 foundation bolts (erection support fixedly outer tank is used), perpendicularity checks: be no more than 10mm in the 1000mm, 56 of stainless steel anchors (by stainless steel band plate and the welding of interior tank skin), fixedly inner canister is used, anchor length franchise is to be no more than 3.2mm in the 305mm, spacing franchise ± 6mm, diameter franchise ± 12mm.
2) basic heater tube is installed:
Heater tube center, basis and surface of base are apart from 278mm, on 90 ° of-270 ° of directions parallel uniform 28, at first in the basis, fill out husky to heater tube saliva mean place, 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) determine the position of parallels all around, basis:
In order to guarantee wallboard perpendicularity and double wall gap, place parallels at tank margin plate periphery during design, to be used as 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 inclined sizing block 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(consider to weld to shrink needs suitable the amplification), adjust rear spot welding, first spot welding stainless steel anchor band position, again spot welding overlapping the slot, then welding, welding sequence is with the electric welding order.
2) center plate is laid, is welded:
From center line, spread in turn 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:
Cement layer position at the bottom of outer tank garden week, the inner canister, inner canister heat insulating block foundation base, check the determining in garden week of usefulness after, mark, mark is clear.Assemble earlier outer tank, the upper alignment code of point marks every Board position simultaneously around the outer tank.
4) outer tank shell is installed:
Begin to lift first block of plate (start position needs spot welding, in order to avoid mobile) from the drawing requirement start position, messenger wire checks perpendicularity, and the plate two ends are supported with angle bar, and spot welding is fixed, and block-by-block is installed in turn, notes simultaneously reserving door direction.
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 joint adjustment are intact, begin to adjust tank skin verticality and ovality again, adopt the method that supports to adjust successively.
Second layer wallboard can and adopt method for supporting centering, adjustment with back of the body thick stick anchor clamps, and spot welding is fixed, and the later on installation of each laminate 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, highly reach 8.55m, at this moment must in tank, assemble top cover earlier, more and more higher with squab panel, all can bring difficulty to group to reaching the handling material.
3, the installation of top cover.
Because outer tank is designed to vault construction, inner canister is outstanding top (flat-top) structure, middle with square steel bar 15 * 15mm(93 bar) connect, and the tank diameter reaches more than 20 meter, middle no upright supports installs simultaneously lifting so consider inside and outside top, simultaneously one of the 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, determines 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 1220mm is made 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.
Lay inner canister lamina tecti (flat-top) welding, 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 earlier skin, repave internal layer, the plate in the middle of spreading at last blocks with jig, welding, and the roof construction pattern is specifically as shown in Figure 3.
3) top cover lifting:
Because top cover is by compression ring and wallboard assembly welding together, so compression ring must be installed earlier.Earlier at the orientation angle plate of ground spot welding compression ring, 3 of every plate points utilize crane lifting to arrive outer tank shell highest point, with special mould clamp group pair.
Top cover punches, and 4 hangers is installed, and is reinforced, and utilizes two 150t crane liftings to put in place, with compression ring group pair.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 tank is opened the gate.
There are 2 blocks of plates to do interim gate on first and second layer of outer tank wallboard and use, do not weld earlier, only spot welding during the Installation and adjustment wallboard, (the inner canister correspondence position has 2 blocks of plates too), this construction that is beneficial to inner canister of leaving a door unlocked is in advance used.
Big door frame is made with the angle steel of 100 * 100 * 10mm, is welded on the wallboard, will be used as then the wallboard at gate and remove, and just can carry out the construction of inner canister.
5, inner canister is installed.
1) installation of interior tank base:
Outside setting-out on the tank bottom, determine pearl sand concrete carrier block position and size under the inner canister margin plate, 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=18mm of jar inherent crane walking is in case outer tank bottom is out of shape.
2) spread margin plate, totally 16 of margin plates because designing requirement docking welding by both sides, earlier per 2 docking, be soldered the front after, turn-over weldering reverse side again, then with eight bulk groups to becoming a circle, be soldered positive after bed hedgehopping, overhead welding welding reverse side is set level rear flaw detection.After qualified, to the margin plate line, mark every Board position, the point location numeral.
3) wallboard is installed:
Inner canister is eight layers of wallboard altogether, utilizes crane and bracket that material is transported in the tank.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.All from gate turnover between inside and outside tank, later on each layer wallboard installation requires the same with outer tank, until the 7th laminate for crane and material.
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 the bottom of the inner canister:
When carrying out installing at the bottom of the inner canister, in pearl sand concrete carrier block collar tie beam, casting one deck 100mm high concrete level 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, collar tie beam and foam glass brick gap are filled with microglass fiber.
After finishing 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, interior jar of gate hoisted in position can be welded then, through after the assay was approved, removes interim doorframe.
6, the inner canister water pressure test.
Give the inner canister water-filling, carry out the inner canister water pressure test, carry out respectively foundation settlement at slack tank, 1/4,1/2, when 3/4 liquid level is high and measure, and make a record.
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, with the suds inspection do not have leakages, do not have be out of shape, no abnormal sound is qualified.
8, air-tight test qualified after, carry out installation and the interlayer of interior closure insulation and fill out perlite, at first in interior tank skin outsourcing one deck fibrous glass cotton, colligation is down loaded perlite with special equipment after well from the top.The layering filling, the layering tamping, until to the top, attention must be tamped, pearl sand must not make moist, and is preferably in 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 are soldered, and last welding after the cooling is with anti-deformation.
The welding of base plate and Wall board angle weld seam should can be carried out after the 3rd layer of wallboard and the 1st ~ 2 layer of wallboard weld seam all are soldered installing at least.
After finishing 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 as shown in Figure 5, every weld seam is the first weldering outside all, rear weldering inboard.
3, the welding of top cover, the welding of inner canister flat-top, collar tie beam is strengthened in earlier weldering, and partly welding requirements is the same with the base plate welding for all the other.Outer tank vault welding sequence 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: following standard 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 especially strict implement welding program, prevent distortion, vacuum test is answered close inspection;
In work progress, conscientiously carry out rainproof waterproof work, the operational procedure elder generation assembly welding outer tank of tank, rear assembly welding inner canister, its purpose are exactly for the rainproof waterproof problem of inner canister, and it is to prohibit water that many materials are wherein arranged;
The ovality of inside and outside tank skin, perpendicularity must strictly be controlled, otherwise will affect the gap of inner canister and the 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, as 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 |
Illustrate: 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 determine the position of parallels all around, basis;
The installation of B, outer tank:
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;
B, outer tank shell are installed, and at first rule interior top is installed, and again setting-out on the internal head cover plate marks outer roof frame pattern and each several part size positions interior top is installed, and lifts at last top cover;
C, open the gate to outer tank, stay two boards to do interim gate at first and second layer of outer tank wallboard during installation, do the inner canister construction and use;
The installation of C, inner canister:
The installation of a, interior tank base, inner canister margin plate position and size are determined in outside setting-out on the tank bottom, 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 docking welding by both sides, qualified rear to the margin plate line, mark every Board position, the point location numeral;
C, wallboard are installed, organize earlier behind the 1-3 layer wallboard, the big door frame of inner canister is installed, fixing, and interim gate wallboard removed, hangs out, the gate is held successfully, and each layer wallboard installed and required the same with outer tank later on, until laminate second from the bottom, last one deck wallboard need connect secondary bar when installing and utilize special hanger colligation lifting;
Install at the bottom of d, the inner canister, at first casting one deck level course in the carrier block collar tie beam spreads 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 collar tie beam and foam glass brick gap are filled with microglass fiber; After finishing 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 inner canister gate hoisted in position, weld then, through after the assay was approved, remove interim doorframe; And inner canister carried out the water pressure test, outer tank opening gate is resetted welding after qualified;
D, carry out air-tight test between interior outer tank at last, after air-tight test is qualified, carries out the installation of interior closure insulation and interlayer and fill out perlite and get final product.
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| CN102444308A (en) * | 2011-09-20 | 2012-05-09 | 中化二建集团有限公司 | Construction method of double-housing large-scale low-temperature storage tank |
| CN103015781A (en) * | 2012-12-05 | 2013-04-03 | 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 |
| CN103692095A (en) * | 2013-12-11 | 2014-04-02 | 中国化学工程第四建设有限公司 | Installation and construction method for large-scale single-disc type outer floating top storage tank |
| CN104704180A (en) * | 2012-11-06 | 2015-06-10 | 株式会社Ihi | Method for constructing cylindrical tank |
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| JP2019007187A (en) * | 2017-06-22 | 2019-01-17 | 東京電力ホールディングス株式会社 | Welded structure, welding method, tank construction method, and tank |
| 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 |
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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 |
| CN102444308A (en) * | 2011-09-20 | 2012-05-09 | 中化二建集团有限公司 | Construction method of double-housing large-scale low-temperature storage tank |
| CN104704180A (en) * | 2012-11-06 | 2015-06-10 | 株式会社Ihi | Method for constructing cylindrical tank |
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| CN103015781A (en) * | 2012-12-05 | 2013-04-03 | 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 |
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