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Патент USA US3083677

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April 2, _ 1963
3,083,668
D. MARCIANO’
TANKER FOR SHIPPING LIQUEFIED HYDROCARBON GAS
5 Sheets-Sheet l
Filed» July 14, 1959
_
INVENTOR,
DOMENICO MARCIA/V0
April 2, 1963'
D. MARCIANO‘
3,083,668
TANKER FOR SHIPPING LIQUEF'IED HYDROCARBON GAS
Filed July 14, 1959
3 Sheets-Sheet 2
,1
INVENTOR.
DOMFENICO MMC/?A/O
vP
5213/6.
’
April 2, 1963
D. MARCIANO’
3,083,658
TANKER FOR SHIPPING LIQUEFIED HYDROCARBON GAS
Filed July 14, 1959
s Sheets—Sheet 5
//V VE/V TOR,
Domenica Marciano’
by
a!
Attorneys '
United States Patent D "
3,083,668
Patented Apr. :2, ‘1963
3.
‘2
3,033,668
outer ihull, so'as to furnish-the ship with an integral con
tribution to 1her vstrength, and to create furthermore a
TANKER FOR swarm; LIQUEF-ED HYDRQ
CARBON ‘GAS
V
Domenico Marciano, rRome,‘lt'aly,-assignor to Conditioned
Power Co. S.p.A., Rome, Italy, a company ‘of Italy
Filed July 14, 1959,, Ser.~No,-826,983
_
Ciaims priority, application Italy July 18, 1958
42'Claims. (Cl. 114-74)
possible collection sump in case-of any‘leaka‘ge'fro'm ‘the
tanks, vpreventing thus the gas from contacting the metal
plates and ‘the structures of the outer vhull.
7In FIG. 3, the numeral reference 2 denotes 'the outer
hull, 3 is the double bill] forming the ?uid-‘tight hold and
-4l-is the wall of the ‘tank 1 =-th'e outside surface of which
‘is ‘insulated as ‘shown ‘at "5 by _a suitable heat insulating
The present'invention'relates'to a~tanker provided with 10 material havingithe proper thickness.
particular features ~rendering ~said "tanker apt to convey,
The tanks are made of a material apt to keep good
under low temperature and atmospheric pressure condi
strength and ductility features also ‘at the low ‘exercise
tions, the lique?ed'hydrocarbon‘gas.
temperatures; said tanks are internally reinforcedas ‘dia
The features'of ‘the present "invention meet certain ‘re
grammatically shown ‘at 6 and are ‘built preferably by
quirements having’an‘essential importance and concern 15 welding techniques.
ing theparticular‘technicalproblem arising when a tanker
‘Eachtank ‘1, as clearly's'hown in r‘FIG.i3,‘iis-1independent
of the concerned type, is to be built.
In other words, the inventive ifeatures relate partic
ularly to the principles adopted for conveying by a tanker
a lique?ed gas, under low temperature ‘and atmospheric
pressure conditions, as well as the kind and the particular
features of the tanks for said lique?ed gas and the sys
tem found for connecting said tanks to the ship’s hull,
with the principle of leaving always open to inspection
the outer surface of the tanks.
‘from the ship’s ‘structure ‘consisting vof the outer hull 2,
and of ‘the inner double hull Seven if-said tank ‘is :per
manently located within the hold.
Each hold, consisting of the doublehull?, isalsototal
ly ?uid tight and as aforesaid it is structurally connected
to the outer hull, thus integrally contributing to the ship’s
strength.
The connection between each tank 1, Le. between the
25 outer wall 4 of said tank and the associated hold 3 is
As far as the ?rst cited requirement is concerned, it
embodied by means of support members 7 having the
is to be noted that in this connection have been considered
the hydrocarbon lique?ed gas which are apt to be used as
fuels and for industrial uses, such as methane, propane,
shape of double tee beams, of a ?exible type as best shown
in FIGS. 4 and 5. Each support 7 consists of a cor
rugated central web 8 provided with the apertures 9 as
butane and the like, and the mixtures thereof.
30 shown in FIG. 5. To the ends of the web 8 are ?xed the
The purpose to be attained is that of conveying the
cross ?anges 10 and 11.
lique?ed gas at a temperature equal to, or lower than the
Considering again the FIG. 3, it has been there shown
boiling point thereof under atmospheric pressure, within
how the double tee elements are applied between the
so heat insulated tanks, that the evaporation of the
top 3' of the double bottom (forming the bottom of the
lique?ed gas due to heat supplied from outside will be 35 hold) and the bottom of the tank, and between the sides
minimized.
of the tank and the side walls of said hold.
Each tank, which must be totally ?uid tight, in order to
The members 7 support the weight of the tank 1, allow
avoid the building up of any pressure due to evaporation
ing its expansion and contraction due to the possible
must be provided with an automatic vent system for the
changes of temperature of the lique?ed gas contained
gas, which may be either lost to atmosphere or recovered 40 within the tank, and because of the fact that they are
and utilized, through a re-liquefaction process, to main
?exible and have the corrugations in the webs thereof
tain low the temperature of the lique?ed gas inside the
are resiliently compressible and expansible so that they
tank.
oppose the movements due to the dynamic ‘action of the
This invention will be further disclosed with reference
wavy motion due to their arrangement practically sur—
45 rounding the tanks.
to the attached drawings, in which:
FIG. 1 shows a side elevational view of a ship em
bodying the inventive principles;
FIG. 2 shows a top plane view of the ship, horizontally
cross-sectioned along the hold plane, both the FIGS. 1
The supports 7 undergo slight bending and torsion
movements. The supports are fastened to both the walls
3 and the ‘bottom 3’ of the hold (double hull) and the
outer surface of the insulation is slidable on said sup
and 2, being largely diagrammatical and intended only to 50 ports. It is preferred to provide a separate section of in
show the arrangement of the tanks, according to this in
sulation 5' between each support and the tank wall 4, the
vention, within the ship’s hull;
insulator 5' being more resistant to wear than the insula
tion 5 used to cover most of the tank.
FIG. 3 shows a main section of the ship, intended to
illustrate the arrangement of the tank;
FIG. 4 shows an elevational view of one of the sup
porting members for the tanks, and
FIG. 5 shows a cross-sectional view of FIG. 4 taken
along the line V--V.
The metal plates of the holds are made of special steel
55 apt to render said holds suitable to contain the lique?ed
gas, in case of breaking down or leak of any tank.
The space 12 (FIG. 3) existing between each container
and the associated hold has such a width to allow the
With reference to the drawings, FIGS. 1 and 2 show
easy, continuous and complete inspection of both the
generally a ship built according to the inventive principles 60 1ringer surface of the tank and the inner surface of the
o d.
and containing a plurality of tanks 1, fore-and-aft aligned.
Obviously, the inventive principle does not affect the size
This space 12 is provided with an adequate air exchange
of the ship, her capacity, and the number of tanks for
the lique?ed gas, the determination of said elements
depending only upon the study of the design of the ship
with respect to her carrying capacity and her required
performance.
which can also be obtained as a forced draught by a suit
able mechanical ventilation unit (not shown in the
65 ?gures) in order to diminish the temperature and the
hunliidity degree of the ambient space surrounding the
tan
.
FIG. 3 more speci?cally depicts the embodiment and
While a speci?c embodiment of the invention has been
the arrangement of a generic tank within the ship’s hull.
shown and described in detail to illustrate the application
It is to be noted that the holds enclosing the tanks form 70 of the invention principles, it will be understood that the
a double hull structurally connected, by means and sys
invention may be embodied otherwise without departing
tems issuing from the scope of this invention, to the
from said principles.
,
'
3,088,668
4
3
I claim:
1. A ship structure for transporting lique?ed petroleum
gas, comprising in combination an outer hull, an inner
said apertures being'corrugated with the corrugations ex
tending parallel to said ?anges, the lower ?ange being
rigidly ?xed to the inner wall of said inner hull, and the
hull mounted in spaced relationship Within said outer hull
upper ?ange being freely slidably held against said tank.
and de?ning within said‘ outer hull a gas tight enclosure,
support members ?xed at spaced points on the bottom and
References’ Cited in the ?le of this patent
side walls of said inner hull, and projecting into said
'UNITED STATES PATENTS
inner hull, said support members being compressible and
956,810
Lamasney et al _________ .__ May 3, 1910
expansible in a direction substantially perpendicular to
Unzue ______________ ..'_.. Oct. 28, 1930
said inner hull, a lique?ed petroleum gas tank freely 10 1,779,786
2,464,356
Stearns ______________ .__ Mar. 15, 1949
slidably mounted in heat insulating relationship on said
supports, a heat insulating layer covering the outer sur
faces of ‘said tank, a hard heat insulating layer covering
said tank at point contacting said supports, said tank being
spaced from the inner hull around the entire periphery of 15
the tank, and slidable on said supports to permit adjust
ment of the position of the tank relative to the inner hull,
the space between the inner hull and the tank being easily
accessible for inspecting said heating insulating layer.
2. A ship ‘structure as claimed in claim 1 in which 20
said support comprises beams which are substantially
2,520,883
2,563,118
2,896,416
2,897,657
2,920,850
2,963,873
2,970,559
2,992,622
2,993,460
Henry _______________ __ July 28, 1959
Rupp ________________ __ Aug. 4, 1959
Campbell ____________ __ Jan. 12, 1960
Stowers _____________ __ Dec. 13,
Leroux _______________ __ Feb. 7,
Maker ______________ __ July 18,
Dreyer ______________ __ July 25,
1960
1961
1961
1961
FOREIGN PATENTS
I-shaped in cross section with a web extending between
two ?anges, said web having a plurality of apertures
therein and the portions of said web remaining between
Kornemann et al _______ .__ Aug. 29, 1950
Jackson ______________ __ Aug. 7, 1951
91,767
746,567
Norway _____________ __ May 27, 1958
Germany ____________ __ Aug. 12, 1944
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