CN104948910A - Upper portion supporting structure for ship low temperature storage tank - Google Patents
Upper portion supporting structure for ship low temperature storage tank Download PDFInfo
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- CN104948910A CN104948910A CN201510398902.XA CN201510398902A CN104948910A CN 104948910 A CN104948910 A CN 104948910A CN 201510398902 A CN201510398902 A CN 201510398902A CN 104948910 A CN104948910 A CN 104948910A
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- upper support
- temperature storage
- storage tank
- upper portion
- main body
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Abstract
The invention discloses an upper portion supporting structure for a ship low temperature storage tank and relates to the field of supporting of low temperature storage tanks. The upper portion supporting structure comprises an upper portion supporting main body, the upper portion supporting main body is of a cylindrical structure, the height of the upper portion supporting main body is 50-60 mm, and the wall thickness is 20-25 mm; the bottom of the upper portion supporting main body is provided with a supporting base, the supporting base is of a hemispheric structure with an opening facing upward, and the height of the supporting base is 40-50 mm. By means of the upper portion supporting structure for the ship low temperature storage tank, the heat transfer area of the upper portion supporting structure is turned into 'point contact' from 'surface contact', on the condition that the whole length of the upper portion supporting structure is guaranteed to be not changed, the heat transfer resistance of the upper portion supporting structure is increased, the heat transfer area is evidently reduced, therefore, the heat absorbed by cryogenic liquid stored in an inner layer pressure container is reduced, and the day evaporation rate of the ship low temperature storage tank is evidently reduced.
Description
Technical field
The present invention relates to the supporting field of low-temperature storage tank for ship, be specifically related to a kind of upper support structure for low-temperature storage tank for ship.
Background technique
Low-temperature storage tank for ship generally adopts horizontal double pressure vessel fabrication to form, and wherein internal pressure container and outer pressurized container all adopt austenitic stainless steel material to make, and the surface of internal pressure container adopts multi-lay winding adiabatic method to carry out adiabatic heat-insulation.Adopt 8 supporting way between internal pressure container and outer pressurized container, its middle and upper part adopts 4 point-supported upper support, and bottom adopts 4 point-supported lower support.Upper support and lower support all adopt the Low-temperature epoxy glass fibre reinforced plastic material manufacture of-196 DEG C.
Internal and external layer pressurized container can connect as one by upper support and lower support, and lower support mainly bears the weight of internal layer container, and upper support mainly bears inertial force effect; Meanwhile, upper support and lower support are also that heat is transmitted to the main path of internal pressure container by external environment condition.
Shown in Fig. 1, Fig. 2, traditional upper support 2 is the cylindrical structure of hollow, when upper support 2 is installed, the top of upper support 2 is fixed by supporting base 3 and outer pressurized container 4, and the bottom of upper support 2 is contacted with internal pressure container 5 by bearing plate 1.
But shown in Figure 2, upper support 2 is in installation and using process, and outside heat can be passed to the cryogenic liquide of storage in internal pressure container 5 successively through the upper support 2 of supporting base 3, hollow and bearing plate 1.Cryogenic liquide can evaporate after absorbing heat and form BOG (Boilling Off Gas, flash steam) gas, when BOG gas exceedes the discharge pressure of safety valve, automatically can be disposed to the external world from safety valve, and then loss part cryogenic liquide.
Summary of the invention
For the defect existed in prior art, the object of the present invention is to provide a kind of upper support structure for low-temperature storage tank for ship.The heat transfer area of upper support structure is become " point cantact " from " face contact " by the present invention, can when ensureing that upper support structure entire length is constant, increase the heat transfer resistance of upper support structure, significantly reduce heat transfer area, and then the heat making the cryogenic liquide of internal pressure containers store absorb reduces, and significantly reduces the Daily boil-off-rate of low-temperature storage tank for ship.
For reaching above object, the upper support structure for low-temperature storage tank for ship provided by the invention, comprises upper support main body, and upper support main body is cylindrical structure, it is characterized in that: the height of described upper support main body is 50 ~ 60mm, and wall thickness is 20 ~ 25mm; The bottom of upper support main body is provided with supporting base, and supporting base is the hemispherical dome structure of opening upwards, and it is highly 40 ~ 50mm.
On the basis of technique scheme, when described upper support structure and low-temperature storage tank are installed, the top of upper support main body is fixed by the supporting base of installation and the outer pressurized container of low-temperature storage tank, the bottom centre of supporting base is contacted with the internal pressure container of low-temperature storage tank by the bearing plate installed.
On the basis of technique scheme, the inwall of described supporting base is the taper of opening upwards.
On the basis of technique scheme, the cone angle of the inwall of described supporting base is 120 °.
On the basis of technique scheme, the height of described supporting base is 45mm.
On the basis of technique scheme, described upper support main body and supporting base one-body molded.
On the basis of technique scheme, the height of described upper support main body is 55mm, and wall thickness is 23mm.
Compared with prior art, the invention has the advantages that:
Upper support structure of the present invention comprises integrated upper support main body and supporting base, the height of upper support main body and supporting base and identical with the height that prior art middle and upper part is supported.Compared with the upper support of cylindrical structure in prior art, the shape (i.e. supporting base) bottom upper support structure, when ensureing that upper support structure entire length is constant, is changed into hemisphere by ring by the present invention.
In view of this, when the present invention installs and uses, the heat transfer area of upper support structure can progressively reduce (hemispherical dome structure opening upwards along the supporting base of hemispherical dome structure, radius is more and more less from top to bottom, and then heat transfer area is reduced gradually), finally level off to " point cantact ".Therefore, the present invention can increase the heat transfer resistance of upper support structure, significantly reduces heat transfer area, and then the heat that the cryogenic liquide of internal pressure containers store is absorbed reduces, and significantly reduces the Daily boil-off-rate of low-temperature storage tank for ship.
Accompanying drawing explanation
Fig. 1 is the structural representation of prior art middle and upper part supporting;
Fig. 2 is upper support of the prior art and low-temperature storage tank for ship structural representation when installing;
Fig. 3 is the structural representation of the upper support structure in the embodiment of the present invention;
Fig. 4 is upper support structure in the embodiment of the present invention and low-temperature storage tank for ship structural representation when installing.
In figure: 1-bearing plate, 2-upper support, 3-supports base, the outer pressurized container of 4-, 5-internal pressure container, 6-upper support main body, 7-supporting base.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
The upper support structure for low-temperature storage tank for ship in the embodiment of the present invention, draws based on Fourier (fourier) law.
According to Fourier law
In above formula, Q is the leaking heat of supporting, and A is the cross-section area of supporting, and L is the length of supporting, and Δ T is the temperature difference at supporting two ends,
for supporting material is at the average thermal conductivity of Δ T temperature range.
As can be seen from the above equation, in order to reduce the heat transfer Q of supporting, the cross-sectional area A supported or the length L increasing supporting can only be reduced.In the design of low-temperature storage tank for ship, because the center of gravity of hull will be reduced, need the weight alleviating storage tank, so during low-temperature storage tank design, the distance (the length L namely supported) of mezzanine space generally can not be increased.Therefore, upper support structure of the present invention, when designing, needs the cross-sectional area A considering how to reduce to support.
In view of this, shown in Figure 3, the upper support structure for low-temperature storage tank for ship in the embodiment of the present invention, comprise upper support main body 6, upper support main body 6 is the cylindrical structure of hollow, it is highly 50 ~ 60mm, and wall thickness is 20 ~ 25mm (height of the present embodiment middle and upper part support body 6 is 55mm, and wall thickness is 23mm).
The bottom of upper support main body 6 is provided with supporting base 7 (upper support main body 6 and supporting base 7 one-body molded), supporting base 7 is the hemispherical dome structure of opening upwards, its overall height is 40 ~ 50mm (in the present embodiment, the height of supporting base 7 is 45mm), and its outer wall is hemisphere; For the ease of the processing of supporting base 7, the inwall of supporting base 7 is the taper of opening upwards, and its cone angle (i.e. base angle) is 120 °
Shown in Figure 4, when the upper support structure for low-temperature storage tank for ship in the embodiment of the present invention is installed, the top of upper support main body 6 is fixed with outer pressurized container 4 by supporting base 3, the bottom centre of supporting base 7 is contacted with internal pressure container 5 by bearing plate 1.
When the upper support structure for low-temperature storage tank for ship in the embodiment of the present invention uses, when ensureing that upper support structure entire length is constant, change the shape of upper support structure.The heat transfer area of upper support structure progressively reduces (hemispherical dome structure opening upwards along the supporting base 7 of hemispherical dome structure, radius is more and more less from top to bottom, and then heat transfer area is reduced, add heat transfer resistance), finally level off to " point cantact " (being actually the face contact that area is very little), significantly reduce heat transfer area, and then the heat that the cryogenic liquide making internal pressure container 5 store absorbs reduces, and significantly reduces the Daily boil-off-rate of low-temperature storage tank for ship.
The present invention is not limited to above-mentioned mode of execution, and for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications are also considered as within protection scope of the present invention.The content be not described in detail in this specification belongs to the known prior art of professional and technical personnel in the field.
Claims (7)
1. the upper support structure for low-temperature storage tank for ship, comprise upper support main body (6), upper support main body (6) is cylindrical structure, it is characterized in that: the height of described upper support main body (6) is 50 ~ 60mm, and wall thickness is 20 ~ 25mm; The bottom of upper support main body (6) is provided with supporting base (7), the hemispherical dome structure that supporting base (7) is opening upwards, and it is highly 40 ~ 50mm.
2. as claimed in claim 1 for the upper support structure of low-temperature storage tank for ship, it is characterized in that: when described upper support structure and low-temperature storage tank are installed, the top of upper support main body (6) is fixed with the outer pressurized container (4) of low-temperature storage tank by the supporting base (3) installed, the bottom centre of supporting base (7) is contacted with the internal pressure container (5) of low-temperature storage tank by the bearing plate (1) installed.
3., as claimed in claim 1 for the upper support structure of low-temperature storage tank for ship, it is characterized in that: the inwall of described supporting base (7) is the taper of opening upwards.
4., as claimed in claim 3 for the upper support structure of low-temperature storage tank for ship, it is characterized in that: the cone angle of the inwall of described supporting base (7) is 120 °.
5. the upper support structure for low-temperature storage tank for ship as described in any one of Claims 1-4, is characterized in that: the height of described supporting base (7) is 45mm.
6. the upper support structure for low-temperature storage tank for ship as described in any one of Claims 1-4, is characterized in that: described upper support main body (6) and supporting base (7) one-body molded.
7. the upper support structure for low-temperature storage tank for ship as described in any one of Claims 1-4, is characterized in that: the height of described upper support main body (6) is 55mm, and wall thickness is 23mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510398902.XA CN104948910B (en) | 2015-07-08 | 2015-07-08 | A kind of upper support structure for low-temperature storage tank for ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510398902.XA CN104948910B (en) | 2015-07-08 | 2015-07-08 | A kind of upper support structure for low-temperature storage tank for ship |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104948910A true CN104948910A (en) | 2015-09-30 |
| CN104948910B CN104948910B (en) | 2017-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510398902.XA Active CN104948910B (en) | 2015-07-08 | 2015-07-08 | A kind of upper support structure for low-temperature storage tank for ship |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109790957A (en) * | 2016-05-18 | 2019-05-21 | Vrv有限公司 | For storing, transporting and distributing the container of liquid or liquefied gas |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8801044A (en) * | 1988-04-21 | 1989-11-16 | Kelpa Cryogenics B V | Liquefied gas transport tank - has sockets in top and bottom of inner vessel for plastic supporting components |
| CN202091771U (en) * | 2011-04-29 | 2011-12-28 | 浙江普阳深冷装备有限公司 | Liner bottom-supporting structure for welded insulated cylinders |
| CN203404609U (en) * | 2013-08-25 | 2014-01-22 | 天津全达科技有限公司 | Novel inner-and-outer barrel supporting structure |
| CN204062462U (en) * | 2014-08-20 | 2014-12-31 | 安徽金鼎锅炉股份有限公司 | A kind of natural gas storage tank peculiar to vessel with guard column structure |
| CN204099901U (en) * | 2014-09-16 | 2015-01-14 | 江西制氧机有限公司 | A kind of low-temperature (low temperature) vessel vacuum sandwich low heat conduction glass reinforced plastic support structure |
| CN204756437U (en) * | 2015-07-08 | 2015-11-11 | 武汉武船重型装备工程有限责任公司 | A upper portion support structure for marine low temperature storage tank |
-
2015
- 2015-07-08 CN CN201510398902.XA patent/CN104948910B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8801044A (en) * | 1988-04-21 | 1989-11-16 | Kelpa Cryogenics B V | Liquefied gas transport tank - has sockets in top and bottom of inner vessel for plastic supporting components |
| CN202091771U (en) * | 2011-04-29 | 2011-12-28 | 浙江普阳深冷装备有限公司 | Liner bottom-supporting structure for welded insulated cylinders |
| CN203404609U (en) * | 2013-08-25 | 2014-01-22 | 天津全达科技有限公司 | Novel inner-and-outer barrel supporting structure |
| CN204062462U (en) * | 2014-08-20 | 2014-12-31 | 安徽金鼎锅炉股份有限公司 | A kind of natural gas storage tank peculiar to vessel with guard column structure |
| CN204099901U (en) * | 2014-09-16 | 2015-01-14 | 江西制氧机有限公司 | A kind of low-temperature (low temperature) vessel vacuum sandwich low heat conduction glass reinforced plastic support structure |
| CN204756437U (en) * | 2015-07-08 | 2015-11-11 | 武汉武船重型装备工程有限责任公司 | A upper portion support structure for marine low temperature storage tank |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109790957A (en) * | 2016-05-18 | 2019-05-21 | Vrv有限公司 | For storing, transporting and distributing the container of liquid or liquefied gas |
| CN109790957B (en) * | 2016-05-18 | 2021-02-26 | Vrv有限公司 | Container for storing, transporting and dispensing liquids or liquefied gases |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104948910B (en) | 2017-03-29 |
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