CN103538817B - The buried twin-wall oil tank of a kind of glass fibre reinforced composion - Google Patents

The buried twin-wall oil tank of a kind of glass fibre reinforced composion Download PDF

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Publication number
CN103538817B
CN103538817B CN201310513531.6A CN201310513531A CN103538817B CN 103538817 B CN103538817 B CN 103538817B CN 201310513531 A CN201310513531 A CN 201310513531A CN 103538817 B CN103538817 B CN 103538817B
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China
Prior art keywords
tank body
glass fibre
fibre reinforced
oil tank
reinforced composion
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CN201310513531.6A
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Chinese (zh)
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CN103538817A (en
Inventor
李华
王慧军
丁笑晖
张璐
惠林海
虢忠仁
张鹏
魏化震
金子明
刘发杰
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中国兵器工业集团第五三研究所
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Publication of CN103538817A publication Critical patent/CN103538817A/en
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Abstract

The invention belongs to packing container technical field, for adopting the integrally-built composite double walled tank of VA RTM technological forming.The glass fibre reinforced composion double-walled buried oil tank that the present invention relates to, be made up of tank body in composite (1) and outer tank body (2), inside and outside tank body is one-shot forming overall structure, gap supporting construction is made up of porous fill materials (9) and support column (10), and outer tank body and support column are structure as a whole; Interior tank wall is thick between 7mm ~ 0.5%dmm (d is tank diameter), and outer tank body wall thickness is between 4mm ~ 10mm.Glass fibre reinforced composion double-walled buried oil tank involved in the present invention, overall stiffness is high, and anti-pressure ability is strong, and have good barrier performance, lightweight, quality conformance is good, and cost is low.Be applicable to the oil storage tank of various applications, especially for the buried oil tank of gas station.

Description

The buried twin-wall oil tank of a kind of glass fibre reinforced composion

Technical field

The invention belongs to packing container technical field, relate to the liquid package container designing technique with column construction, particularly buried oil tank technical field, also relate to galss fiber reinforced resin based composites technical field simultaneously.

Background technology

Double walled tank manufacturer double-wall glass steel buried tank manufacturing process such as Canada ZCL company and U.S. XERXES etc. is identical, first apply female mold and prepare half tank body, outer wall and reinforcement one-body molded through spray technology, by 3D fabric or spacer particles and barrier film coating to inside outer wall, two and half tank body docking are finally formed complete double walled tank tank body by then injection molding double walled tank inwall.

CN201010298344.7, a kind of glass fiber reinforced plastics twin-wall oil tank and preparation method thereof and particular manufacturing craft, involved double walled tank inside and outside wall is the double walled tank that the short two tank body of fiberglass cutting injection is spliced, and its gap is that the bulked glass yarn solidification that W type or V-type scribble tackifying resin forms.The short fiberglass tank body cutting injection, wall thickness is large, and total quality weight, structural strength is lower, and cost is high.

Glass fiber reinforced plastics twin-wall tank described in US5224621, in it, outer tank body is the composite that glass fiber winding is made, and cavity adopts the silk thread of certain diameter to be wound in inner canister external surface, separates interior outer tank body and generates small space, for tracer liquid flowing, reach the object of leak detection.

Summary of the invention

The object of the present invention is to provide a kind of double-wall glass fibre reinforced composites buried oil tank of corrosion-resistant, antiseep.

The object of the present invention is achieved like this, double-wall glass fibre reinforced composites buried oil tank that is corrosion-resistant, antiseep is made up of the inside and outside tank body of composite, interior outer tank body is prepared from by overall fabric reinforced composites integration, and interior tank body comprises structure sheaf and barrier layer; For there being the continuous cavity of supporting construction between interior outer tank body, arrange the concrete dynamic modulus packing material with certain rigidity in cavity structure, the enhancing arranged in concrete dynamic modulus packing material point, plays supplemental support effect; Cavity structure both sides are provided with the barrier film of band polyurethane adhesive, adhesive and matrix resin adhesive strength higher, a little waiting formation organic whole structure with inside and outside tank body with strengthening, making inside and outside tank body and middle cavity form the composite structure of a three-dimensional sandwich; Adopt the one-body molded double walled tank of VA RTM, outer tank body and cavity in bilateral barrier film is isolated, form leak detection gap.

The glass fibre reinforced composion double-walled buried oil tank that the present invention relates to, be made up of tank body in composite 1 and outer tank body 2, interior tank body 1 comprises structure sheaf 3 and barrier layer 4, the gap 5 with continuous cavity is set between inside and outside tank body, in gap, supporting construction is set, it is characterized in that: inside and outside tank body is one-shot forming overall structure, interior tank body barrier film 6 is set between interior tank body and gap, outer tank body barrier film 7 is set between gap and outer tank body; Gap supporting construction is made up of porous fill materials 9 and support column 10, and outer tank body and support column are structure as a whole; Interior tank wall is thick between 7mm ~ 0.5%d (d is tank diameter), and outer tank body wall thickness is between 4mm ~ 10mm, and as shown in Figure 1, tank body cross-section structure as shown in Figure 2 for tank structure.

The glass fibre reinforced composion double-walled buried oil tank that the present invention relates to, be made up of tank body in composite 1 and outer tank body 2, interior tank body 1 comprises structure sheaf 3 and barrier layer 4, the gap 5 with continuous cavity is set between inside and outside tank body, in gap, supporting construction is set, it is characterized in that: outer tank body barrier film 7 is provided with perforate 8.

The glass fibre reinforced composion double-walled buried oil tank that the present invention relates to, be made up of tank body in composite 1 and outer tank body 2, interior tank body 1 comprises structure sheaf 3 and barrier layer 4, the gap 5 with continuous cavity is set between inside and outside tank body, in gap, supporting construction is set, it is characterized in that: the distribution density of support column 10 is between 5/m 2~ 15/m 2between, single support column area is between 25mm 2~ 2500mm 2between.

The glass fibre reinforced composion double-walled buried oil tank that the present invention relates to, be made up of tank body in composite 1 and outer tank body 2, interior tank body 1 comprises structure sheaf 3 and barrier layer 4, the gap 5 with continuous cavity is set between inside and outside tank body, in gap, supporting construction is set, it is characterized in that: described barrier film thickness is between 0.06mm ~ 0.2mm, and interior tank body barrier film 6, outer tank body barrier film 7 thickness are independent of one another.

The glass fibre reinforced composion double-walled buried oil tank that the present invention relates to, be made up of tank body in composite 1 and outer tank body 2, interior tank body 1 comprises structure sheaf 3 and barrier layer 4, the gap 5 with continuous cavity is set between inside and outside tank body, supporting construction 10 is set in gap, it is characterized in that: described barrier film is selected from the one in PET film material, polyurethane film, nylon film, interior tank body barrier film 6, outer tank body barrier film 7 material are independent of one another.

The glass fibre reinforced composion double-walled buried oil tank that the present invention relates to, be made up of tank body in composite 1 and outer tank body 2, interior tank body 1 comprises structure sheaf 3 and barrier layer 4, the gap 5 with continuous cavity is set between inside and outside tank body, in gap, supporting construction is set, it is characterized in that: described porous fill materials 9 is selected from the one in control of two-dimensional braided thing or 3 D stereo braid.

The glass fibre reinforced composion double-walled buried oil tank that the present invention relates to, be made up of tank body in composite 1 and outer tank body 2, interior tank body 1 comprises structure sheaf 3 and barrier layer 4, the gap 5 with continuous cavity is set between inside and outside tank body, in gap, supporting construction is set, it is characterized in that: the described braid as porous fill materials 9 litzendraht wire diameter used is between 0.25mm ~ 1.5mm.

The glass fibre reinforced composion double-walled buried oil tank that the present invention relates to, be made up of tank body in composite 1 and outer tank body 2, interior tank body 1 comprises structure sheaf 3 and barrier layer 4, the gap 5 with continuous cavity is set between inside and outside tank body, in gap, supporting construction is set, it is characterized in that: the litzendraht wire thread count of described control of two-dimensional braided thing is respectively between 100 pieces/meter ~ 800 pieces/meter.

The glass fibre reinforced composion double-walled buried oil tank that the present invention relates to, be made up of tank body in composite 1 and outer tank body 2, interior tank body 1 comprises structure sheaf 3 and barrier layer 4, the gap 5 with continuous cavity is set between inside and outside tank body, in gap, supporting construction is set, it is characterized in that: described interior tank body 1 and outer tank body 2 reinforcing material are selected from a kind of or wherein several hybrid structures in glass fibre woven roving, ± 45 ° of glass fibre non-crimp fabrics ,+45 °/0 °/90 °/-45 ° glass fibre non-crimp fabrics.

The glass fibre reinforced composion double-walled buried oil tank that the present invention relates to, be made up of tank body in composite 1 and outer tank body 2, interior tank body 1 comprises structure sheaf 3 and barrier layer 4, the gap 5 with continuous cavity is set between inside and outside tank body, in gap, supporting construction is set, it is characterized in that: conductive layer 11 is covered on described barrier layer 4 surface.

The glass fibre reinforced composion double-walled buried oil tank that the present invention relates to, be made up of tank body in composite 1 and outer tank body 2, interior tank body 1 comprises structure sheaf 3 and barrier layer 4, the gap 5 with continuous cavity is set between inside and outside tank body, in gap, supporting construction is set, it is characterized in that: described conductive layer 11 is selected from the one in conductive fabric, wire netting or conductive paint.

Glass fibre reinforced composion double-walled buried oil tank involved in the present invention, overall stiffness is high, and anti-pressure ability is strong, and have good barrier performance, lightweight, quality conformance is good, and cost is low.Be applicable to the oil storage tank of various applications, especially for the buried oil tank of gas station.

Accompanying drawing explanation

The double-walled buried oil tank structural representation that accompanying drawing 1 the present invention relates to

The double-walled buried oil tank tank body cross-sectional view that accompanying drawing 2 the present invention relates to

The double-walled buried oil tank forming die structure schematic diagram that accompanying drawing 3 the present invention relates to

The double-walled buried oil tank mould cross-sectional view that accompanying drawing 4 the present invention relates to

Wherein: 1-interior tank body, 2-outer tank body, 3-structure sheaf, 4-barrier layer, 5-gap, 6-interior tank body barrier film, 7-outer tank body barrier film, 8-perforate, 9-porous fill materials, 10-support column, 11-conductive layer, 12-oil tank suspension ring, 14-reinforcement; 15-formpiston, 16-initial gum-injecting port, 17-former, 18-process gum-injecting port, 19-gas extraction system, 20-linkage, 21-lifting ring mechanism, 22-blocking mechanism, 23-manhole.

Detailed description of the invention

Below with a kind of 50m 3composite double walled tank (structure as shown in Figure 1) by reference to the accompanying drawings the buried twin-wall oil tank of composite provided by the present invention is described in further detail for example, but not as the restriction to protection domain.

50m 3composite twin-wall oil tank external diameter 3m, internal diameter 2.97m, length 9m, inside and outside wall thickness is respectively 9mm and 6mm, gap 1mm, and with the manhole of a 600mm, cross-section structure is as shown in Figure 2.

As shown in Figure 3, as shown in Figure 4, former 17 is that the steel semicircle die combination that 15mm is thick forms by a pair thickness to radial section structure to mould structure, semicircle mould cylinder segment length 9m, diameter 3m, the sphere of end face to be radius be 1.5m, cylindrical section and sphere rounding off; At mold cylinder section matched moulds place, side arranges 4 groups of linkages 20, and opposite side correspondence position arranges 4 cover blocking mechanisms 22, and circumference 1/4th place, epivalve mould blocking mechanism side is symmetrical parallel arranges 1 pair of lifting ring mechanism 21; It is uniform that matched moulds place arranges 13 initial gum-injecting port 16(respectively) and gas extraction system 19, two lobe mould symmetrical equidistantly arrange respectively 8 rows, 13/to be drained through journey gum-injecting port 18(uniform); 20mm gap is left between former upper/lower die, dual-side is along horizontal weld width 300mm, thickness 15mm, length is the steel plate of 4m, arrange 1 at the every 700mm in linkage side, matched moulds place and 13 initial gum-injecting ports 16 are set altogether, be connected with resin filling system, blocking mechanism side arranges gas extraction system, be connected with vacuum system, on the right side of former mold top, 2m place, distance right summit arranges the manhole 23 that a diameter is 600mm, arranges 2 lifting ring mechanisms 21 in former mold close 45° angle position adjacent with gas extraction system.

Formpiston 15 is the silicon rubber bag of 10mm thickness, band manhole 23, length 8.97m, external diameter 2.97m, two ends spherical radius (external diameter) 1.485m; Injection system is set with former correspondence position, forms inner tank wall injection system.Oil storage tank formpiston is formed in one, and arranges corresponding each system to former correspondence position.

Get out the formpiston of silicon rubber, lie on hypovalve former 17, in the surrounding of silicon rubber mould according to shown in accompanying drawing 1, composition order lay material from inside to outside, tank body internal layer one deck surface density is 50g/m 2conductive fabric, 1 layer of 12 order nylon material orthogonal weave grid cloth, 8 layers+45 °/0 °/90 °/-45 ° glass fibre non-crimp fabric ECW1200, then the interior tank body barrier film 6 that a layer thickness is 0.1mmPET material is spread, both sides spraying WSJ-760 polyurethane adhesive, bonding a layer thickness is the orthogonal weave polyethylene porous packing material 9 that 1mm has gap, litzendraht wire diameter is 0.5mm, count is 450/m, then the PET outer tank body barrier film 7 that a layer thickness is 0.1mm both sides spraying WSJ-760 polyurethane adhesive is repaved, as shown in Figure 2, φ 1mm perforate 8 is played according to the spacing of 500mm × 500mm on outer tank body barrier film 7, support column 10 is formed during perfusion resin, lay 3 layers+45 °/0 °/90 °/-45 ° glass fibre non-crimp fabric ECW1200 and one deck 12 order nylon material orthogonal weave grid cloth, the oil tank preform of a slightly entirety for intensity is made it to become by a small amount of 3M glue spraying, by epivalve external mold and hypovalve external mold matched moulds, fixture is adopted to fix, vacuum bag film and sealing joint strip is adopted to close at former intermediate gap place, yin, yang mould is closed by vacuum bag and sealing joint strip at manhole place, after arranging VA RTM process system and resin import system, adopt vacuum bag and sealing joint strip to close two lobe formers, be evacuated to-0.1MPa.

Adopt the p-phenyl of Lei Kede company short unsaturated-resin Corrolite490 in advance, adopt the MEKP-9 curing agent of Shuo Jin company, according to resin: the consumption of curing agent 100:1 divides nine batches to configure resin, and total amount is 1000kg.

Prepare 26 resin barrels, weighed according to proportioning by resin and mix in rear even point to 26 resin barrel, open each 13 initial gum-injecting port valves corresponding on inside and outside mould, under the effect of vacuum, resin imports preform.Resin flows, to when being respectively drained through journey gum-injecting port, being closed initial gum-injecting port valve, is opened corresponding process gum-injecting port valve, imports resin by process gum-injecting port, improves resin mold filling speed.When being full of mould completely to resin, close all resin gum-injecting port valves, continue to be evacuated to and solidify completely, the demoulding obtains outer tank body wall thickness 5mm, the thick 10mm of interior tank wall, the 50m of gap 1mm 3double-wall storage tank tank body.

Process Installation reinforcement, flange arrangement, leakage detection device and suspension ring routinely, obtain the global formation composite twin-wall oil tank that the present invention relates to.

In this twin-wall oil tank, outer tank body and middle cavity are integral sandwiched composite structure, porosity 0.2%, and overall stiffness is high, compared with existing two halves tank body splicing process, structural strength is suitable, and weight reduction reaches 30%, material cost reduces by 20%, and has stronger impermeable ability.

Claims (10)

1. a glass fibre reinforced composion double-walled buried oil tank, be made up of tank body in composite (1) and outer tank body (2), interior tank body (1) comprises structure sheaf (3) and barrier layer (4), in, the gap (5) with continuous cavity is set between outer tank body, in gap, supporting construction is set, it is characterized in that: interior tank body, outer tank body and supporting construction are one-shot forming overall structure, interior tank body barrier film (6) is set between interior tank body and gap, the outer tank body barrier film (7) of perforate (8) is provided with between gap and outer tank body, gap supporting construction is made up of porous fill materials (9) and support column (10), and outer tank body and support column are structure as a whole, interior tank wall is thick between 7mm ~ 0.5%d, and d is tank diameter, and outer tank body wall thickness is between 4mm ~ 10mm.
2. glass fibre reinforced composion double-walled buried oil tank according to claim 1, is characterized in that: the distribution density of support column (10) is between 5/m 2~ 15/m 2between, single support column area is between 25mm 2~ 2500mm 2between.
3. glass fibre reinforced composion double-walled buried oil tank according to claim 1, it is characterized in that: described barrier film thickness is between 0.06mm ~ 0.2mm, and interior tank body barrier film (6), outer tank body barrier film (7) thickness are independent of one another.
4. glass fibre reinforced composion double-walled buried oil tank according to claim 1, it is characterized in that: described barrier film is selected from the one in interlayer PET film material, polyurethane film, nylon film, interior tank body barrier film (6), outer tank body barrier film (7) material are independent of one another.
5. glass fibre reinforced composion double-walled buried oil tank according to claim 1, is characterized in that: described porous fill materials (9) is selected from the one in control of two-dimensional braided thing or 3 D stereo braid.
6. glass fibre reinforced composion double-walled buried oil tank according to claim 5, is characterized in that: the litzendraht wire diameter of described braid is between 0.25mm ~ 1.5mm.
7. glass fibre reinforced composion double-walled buried oil tank according to claim 5, is characterized in that: the litzendraht wire thread count of described control of two-dimensional braided thing is respectively between 100 pieces/meter ~ 800 pieces/meter.
8. glass fibre reinforced composion double-walled buried oil tank according to claim 1, is characterized in that: described interior tank body (1) and outer tank body (2) reinforcing material are selected from a kind of or wherein several hybrid structures in glass fibre woven roving, ± 45 ° of glass fibre non-crimp fabrics ,+45 °/0 °/90 °/-45 ° glass fibre non-crimp fabrics.
9. glass fibre reinforced composion double-walled buried oil tank according to claim 1, is characterized in that: conductive layer (11) is covered on described barrier layer (4) surface.
10. glass fibre reinforced composion double-walled buried oil tank according to claim 9, is characterized in that: described conductive layer (11) is selected from the one in conductive fabric, wire netting or conductive paint.
CN201310513531.6A 2013-10-25 2013-10-25 The buried twin-wall oil tank of a kind of glass fibre reinforced composion CN103538817B (en)

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CN104275565B (en) * 2014-08-13 2016-06-15 浙江海洋学院 Oil tank strengthening core solder loading machine
CN106742870A (en) * 2016-11-11 2017-05-31 吴伯明 A kind of direct burial composite double Deck Oil Storage Tank and preparation method thereof
CN106672455B (en) * 2017-02-05 2018-08-10 新疆联诚重工科技有限公司 A kind of glass fibre two-compartment oil tank and preparation method thereof and dedicated unit

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4781777A (en) * 1985-05-28 1988-11-01 Owens-Corning Fiberglas Corporation Double-wall underground tank and method of making
US4936705A (en) * 1988-03-17 1990-06-26 Owens-Corning Fiberglas Corporation Reservoir for an underground tank
US6886388B1 (en) * 2002-04-24 2005-05-03 Mcgill M. Daniel Contiguous double containment underground storage tank fueling system and methods for detecting leaks therein
CN103264848A (en) * 2013-06-04 2013-08-28 连云港中复连众复合材料集团有限公司 Buried glass fiber reinforced plastic double-wall oil storage tank monitored through liquid medium and preparing method of buried glass fiber reinforced plastic double-wall oil storage tank
CN203512432U (en) * 2013-10-25 2014-04-02 中国兵器工业集团第五三研究所 Glass-fiber reinforced composite buried double-wall oil storage tank

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2558737C3 (en) * 1975-12-24 1984-04-05 Harry 2350 Neumuenster De Haase

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4781777A (en) * 1985-05-28 1988-11-01 Owens-Corning Fiberglas Corporation Double-wall underground tank and method of making
US4936705A (en) * 1988-03-17 1990-06-26 Owens-Corning Fiberglas Corporation Reservoir for an underground tank
US6886388B1 (en) * 2002-04-24 2005-05-03 Mcgill M. Daniel Contiguous double containment underground storage tank fueling system and methods for detecting leaks therein
CN103264848A (en) * 2013-06-04 2013-08-28 连云港中复连众复合材料集团有限公司 Buried glass fiber reinforced plastic double-wall oil storage tank monitored through liquid medium and preparing method of buried glass fiber reinforced plastic double-wall oil storage tank
CN203512432U (en) * 2013-10-25 2014-04-02 中国兵器工业集团第五三研究所 Glass-fiber reinforced composite buried double-wall oil storage tank

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