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Патент USA US3096913

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July 9, 1963
c. E. SCHROEDER
3,096,902
STORAGE INSTALLATION
Filed March 20 ,
1961
$41
1 /:
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INVENTOR
CARL E SGHROEDER
By
my
ATTORNEY
United States Patent 0
1
1
3,096,902
Patented July 9, 1963
2
In the drawings:
3,096,902
STORAGE INSTALLATION
Carl E. Schroeder, Ponca City, Okla, assignor to Con
tinental Oil Company, Ponea City, Okla., a corpora
tion ‘of Delaware
Filed Mar. 20, 1961, Ser. No. 96,813
12 Claims. (c1. 220_1s)
FIGURE 1 is a perspective view, partially cut away,
of an underground storage installation embodying this
invention. Insulation used therein has been omitted for
clarity.
FIGURE 2 is an enlarged cross sectional view taken on
line 22 of FIGURE 1 showing in greater detail a vapor
sealing arrangement as well as insulation used therein.
Referring now to the drawings and in particular to
This invention relates generally to a storage installa
tion and more particularly to a suspended underground
10 FIGURE 1, there is shown along the surface of the earth
storage tank which may be utilized to contain low tem
a plurality of paired foundation members 11 which can
perature liquids.
be partially buried, as indicated at 12 in FIGURE 2.
‘ In large scale re?nery and other manufacturing opera
While the foundation members are shown in the draw
tions it is often necessary to store large quantities of
liquids either temporarily or for extended periods of time. 15 ing as being of a particular shape, it is to ‘be understood
that other forms may ‘be used. For example, piling
Heretofore, relatively large above-ground tanks have been
might be substituted for the disclosed structure, or a
utilized for this purpose. However, such tanks have not
single pair of substantial parallel horizontal foundations
been found to be satisfactory for all conditions which
may be encountered; and consequently, improvements in
storage facilities have long been sought. In the usual
vabove-ground storage installation it is often necessary to
do extensive earth work to prepare the ground prior to
the erection of the storage tanks. Moreover, relatively
elaborate fundations are necessary, as are extensive dikes
might be used in the place of the plurality of pairs shown.
Formed within the body of each of the foundation mem
bers 11 is a U-shaped notch 13 in which is shown a con
tinuous elongate trough 14 which can be made of steel,
plastic, or other impervious materials. As best shown
in FIGURE 1, liquid, such as water, is placed in trough
'14 for a purpose hereinafter described. Terminating in
which must encompass a substantially greater area than 25
proximity to trough 14 are a plurality of support means
is covered by the tank itself. In certain areas of ex
such as I-beams 16 which are placed on or secured to the
tremely hard, irregular soil, the normal problems attend
ant to preparation of the area for the storage tanks are
greatly magni?ed and in some instances may jeopardize
pairs of opposed foundation members 11. The central
portion of each of the beams is suspended over a pit
or depression 17 formed in the earth and has attached
thereto a plurality of clevises 15. To these clevises are
the economic feasibility of the whole project.
With the advent of the use of large quantities of low
temperature liquids, the problems arising from above
ground installation have increased. Due to the nature of
attached spring hangers 20 from which depend suspen
terials around the exterior of the tanks and the use of
near the center of the tank if desired, or may be omitted
sion means 18 which ‘can be either ?exible cable or rigid
bar. It is to be understood that while these suspension
these liquids, it is necessary that heat loss ‘be maintained
means are shown to be of equal length in the drawings,
at a minimum; and in order to minimize this loss in the 35 it is contemplated that they can be of unequal length,
surface storage installations, various schemes have been
depending upon the relative elevation of foundation mem
tried. Among these are the securing of insulating ma
bers 11. Further, the spring hangers 20 may be omitted
double-walled tanks. In either case, the problems attend
entirely when the length of the installation is such that
ant to the erection and maintenance of the heat barriers 40 thermal contraction is relatively small.
have proved to be formidable.
A clevis 19 is attached at the lower end of each of the
The present invention contemplates a novel storage
suspension means 18 and has secured thereto a container
installation which can be erected quickly and economical
21 which is suspended thereby above the bottom of pit
ly and which is not subject to many of the problems
17.
While a reactangular tank having a. square cross
brought about by surface storage. This installation com 45 section is shown in the drawings, many other types of
prises one or more foundation members disposed along
sides of a depression in the earth. Disposed between
each pair of foundation members is a support means to
which ?exible suspension means are connected in a posi
tion substantially over the depression.
Secured to the
suspension means is a container into which a material can
be placed. Outside the container and within the walls
of the depression is, provided a vapor barrier as well as
a quantity of insulating material.
An important object of this invention is to facilitate
the storage of materials with minimum heat loss there
from.
Another object of this invention is to provide a liquid
storage installation which does not necessitate the use
of extensive dikes.
A further object of this invention is to provide a stor
age installation which may be quickly and economically
installed under adverse terrain conditions.
Another object of this invention is to provide a stor
tanks may be usedfor this purpose, such as a cylindrical
tank, or should the occasion warrant, a semicircular tank,
to mention a few. Moreover, bracing or other stiffening
members may be added to the tank as the circumstances
demand. Such bracing has been omitted in the drawings
‘for clarity, and inasmuch as particular bracing or stiffen
ing arrangements ‘will vary depending upon the size, shape
and material of the tank and can be added by ‘anyone
skilled in the art. In addition, if it is desired, cribbing
may be added beneath the tank without departing from.
the spirit of this invention.
Exterior of container 21 is provided ‘a quantity .of in—
sulating material 22 which may be made of perlite, either
loose or in bags, mineral wool, glass Wool or any other
insulating materials which are well known and which will
be obvious to one skilled in the art. Contacting the in
sulating material can be a liquid-vapor barrier 23 which
is applied to the sides of pit or depression 17. The bar
rier may be formed from one or more of many well
age installation wherein thermal stresses are minimized. 65 known materials such as asphalt, gunite, plastic, or a
Yet another object of this invention is to provide a
variety of other materials which are well known in the
storage installation which is less susceptible to puncture
or other injury.
art. Secured above pit 17 and resting upon I-beams 16,
is a substantially impervious sheet or cover 24 having
Other objects and advantages of the invention will be
?anges 26 formed on all four edges thereof. This cover
evident from the following detailed description when 70 can be made of any impervious material such as steel,
read in conjunction with the accompanying drawings
aluminum or other sheet metal, plastic, rubberized can
which illustrate one embodiment of my invention.
vas or other materials. Flanges 26 extend into the liquid
3,096,902
3
-
contained in trough 14 which is disposed on all four
sides of pit 17.
By this arrangement, is it possible
4
4. A reservoir comprising a pit in the ground, support
means secured on at least two sides of said pit and
extending thereacross, suspension means connected to
to maintain ‘a vapor-tight seal completely surrounding
said support means, a container secured to said suspen
pit 17 and thus prevent vapor losses from container 21.
sion means and suspended thereby within said pit above
Of course, other edge sealing methods may be utilized
the bottom thereof, a substantially impervious sheet dis
without departing from the scope of this invention. For
posed above said container, and means for sealing the
instance, the ?anges 26 could be fastened to foundation
edges of said sheet to prevent escape of vapor from said
members 11 with the portion of the ?anges between the
pit.
members being buried. Alternately, a member could be
5. A reservoir comprising a pit formed in the ground,
provided between members 11 to which the ?anges 26 10
a plurality ‘of beams secured on opposite sides of said pit
could be fastened.
and extending thereacross, a plurality of elongated, down
In use, a quantity of material, for instance, low tem
wardly extending suspension members secured to each of
perature LPG is placed in container 21, after which
said beams on the central portion thereof, a container
cover 24 is placed thereon with ?anges 26 extending into
trough 14. Under these conditions, heat loss will, due 15 secured to said suspension members and suspended there
by within said pit above the bottom thereof, a substan
to the presence of insulating materials 22, be maintained
at a minimum, as will vapor losses due to the sealing
tially impervious sheet disposed above said beams, and
arrangement made possible by ?anges 26 and trough 14.
means for sealing the edges of said sheet to prevent escape
of vapor from said pit.
6. A reservoir comprising a depression in the ground,
Should rupture of the container 21 occur, the lack of
extensive diking will not be a factor inasmuch as the
liquid within the container will flow into pit or depres
support means secured on at least two sides of said de
sion 17 without attendant loss or adulteration of the sur
pression and extending thereacross, suspension mean con
rounding countryside. Since exte-nsive dike work is not
nected to said support means said suspension means in
necessary, it is possible by this arrangement to better
cluding a clevis at the points of connection with said sup
utilize a given surface area. Simple ‘computations in 25 port means and a spring secured to each clevis, a con
dicate that it is possible when using the present installa
tainer secured to said suspension means, a liquid barrier
tion to store 486,000 cubic feet of material; where be
between said container and the walls of said depression,
fore, using conventional surface storage, it was possible
and insulating material disposed between said barrier and
.. to store only 60,750 cubic feet.
Moreover, inasmuch as
container 21 is suspended, any thermal expansion or 30
contraction therein will result only in the slight lowering
or elevating of the bottom of container 21 and slight
" 1 movement of the ends of container-21 which is allowed
by clevises 15 and 19‘ and will not induce thermal stress
therein.
1
While particular embodiments of the invention have
said container.
'
7. The structure recited in claim 6‘ wherein said sup
port means include a plurality of beams.
8. The structure recited in claim 7 wherein said sus
pension means includes a cable connected to each of
said springs.
9. The structure recited in claim 8 wherein a substan
tially impervious sheet is disposed above said support
been described, it will be understood, of course, that
means and means are provided for sealing the edges of
the invention is not limited thereto, since many modi?ca
said sheet to'prevent escape of vapor from said depression.
tions may be made; and it is therefore contemplated to
10. The stnucture recited in claimv 6 wherein a plu
cover by the appended claims any such modi?cations as 40 rality of foundation members are provided beneath a por
fall within the true spirit and scope of the invention.
tion of said support means.
The invention having thus been described, what is
v11. The structure recited in claim 10 wherein a sub
claimed and ‘desired to be secured by Letters Patent is:
stantially impervious sheet is disposed above said support
1. A reservoir comprising a depression in the ground,
means.
support means secured on at least two sides of said de 45
12. A reservoir comprising a depression in the ground,
pression and extending thereacross, a plurality of cables
connected 'to said support means and a container secured
to said cables and suspended thereby within said depres~
sion above the bottom thereof.
a plurality of beams secured on at least two sides of said
depression and extending thereacross, a plurality of cables
connected to said beams, a container secured to said
a liquid ‘barrier between said container and the
2. A reservoir comprising a depression in the ground, 50 oa‘bles,
walls of said depression, insulating material disposed be
a plurality of beams secured on opposite sides of said
tween said ‘barrier and said container, a substantially
depression and extending thereacross elongate, suspen
impervious sheet disposed above said support means, and
sion means depending from each of said beams toward
means for sealing the edges of said sheet to prevent the
the bottom of said ‘depression, a clevis at the lower end
escape of vapor from said depression.
of said means, and a container secured to said suspen
sion means by said clevises and suspended thereby Within
References Cited in the ?le of this patent
said ‘depression above the bottom thereof.
v3:. A reservoir comprising a pit in the ground, a plural~
UNITED STATES PATENTS
ity of beams secured on opposite sides of said pit and
extending thereacross, a plurality of elongated down
2,398,828
Gray ________________ __ Apr. 23, 1946
wardly extending suspension members secured to each
2,562,601
Caquot ______________ __ July 31, 1951
472,683
Germany _____________ __ Mar. 2, 1929
of said beams at the central portion thereof a. clevis at
each end of said members, and a container secured to
said suspension members by said olevises and suspended
thereby within said pit above the bottom thereof.
65
FOREIGN PATENTS
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