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Патент USA US3024952

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March 13, 1962
E. F, SCHMITZ
3,024,942
REINFORCED TANK STRUCTURE
Q EWALD F SCHMITZ
BY
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Ovfforneqs
March 13, 1962
E. F. SCHMITZ
3,024,942
REINFORCED TANK STRUCTURE
Filed May 14, 1958
3 Sheets-Sheet 2
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INVENTOR.
EWALD F SUHMITZ
March 13, 1962
3,024,942
E. F. SCHMITZ
REINFORCED TANK STRUCTURE
Filed May 14, 1958
5 Sheets-Sheet 3
INVENTOR.
EWALD E SCHMITZ
BY
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Óvíforneys
United States Patent
free
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Patented Mar. 13, i952
i.
2
3,024,942
The top panel 6 is provided with a contour correspond
ing to a longitudinal half-section of a cylinder. Not only
Ewald F. Schmitz, Milwaukee, Wis., assigner to A. 0.
Smith Corporation, Milwaukee, Wis., a corporation of
ward deformation of the top panel due -to internal gas
pressures generated yby the contained liquid but also by
RElNFURCED TANK STRUQTURE
New York
Filed May 14, 1958, Ser. No. 735,175
3 Claims. (Cl. 228-71)
does such a contour provide increased resistance to out
reason of such contour, the resultant hoop stress on the
top panel is directed tangentially to the side panels and
thus has no transverse component of force on the side
This invention relates to storage tanks and more par
panels. The need for stitfeners or ribs encompassing the
ticularly to fermenting tanks for use in the brewing in 10 top of the tank to provide reinforcement for the top
dustry. The invention is an improvement of the rein
and side panels of the tank is thus eliminated thereby
forced tank structure described in the United States Pat
making possible a saving of considerable material and
tent to Schmitz, 2,675,940.
labor in the fabrication of the tank.
The invention provides an improved method for struc
The end panels 7 of the tank are welded to the tank
turally reinforcing a thin-walled storage tank. More
with each end panel being comprised of' a plurality of
particularly, the improvement resides in the use of end
sections which are individually and sequentially assem
and top panels which are contoured in a manner which
bled to the tank. The upper section 15 of each end panel
eliminates the need for reinforcing ribs or the like in
7 is a half-section of a flanged and dished head and is
those areas. The side and bottom panels of the tank are
welded to either end of top panel 6 along the seam 16.
flat in nature and are provided with the aligned external 20
With end section 15 in place, a dat rectangular sheet
reinforcing ribs substantially of the type described in
of metal 17 is initially formed to the contour of the bot
Patent 2,675,940.
tom edge of section 15 and welded to each side panel 5
This construction enables the thin-walled tank to with
along the seam 1S, and to the lower edge of section 15
stand both the weight of liquid contained in the tank and
along seam 19.
the internal gas pressure generated by the liquid while
The bottom section 2i) of the end panel 7 consisting of
holding the requirement for external reinforcing members
an arcuate metal sheet having an upwardly turned outer
to a minimum.
edge is then welded to the curved lower edge of sheet
17 and to the edge of bottom panel 4 along the seams
ln addition, by reason of such construction, fabrica
tion of the tank is facilitated and labor is held to a mini
mum.
21 and 2.2 respectively. The upwardly turned edge of
30 section 2li terminates rearwardly of the edge of bottom
Further objects and advantages of the invention will
panel ¿i and each resultant opening in the four corners
appear in the course of the following description.
of the tank is closed yby a cap plate 23 having contoured
The drawings illustrate the best mode presently con
edge portions to conform to the respective adjoining edges
templated of carrying out the invention.
of section 20. metal sheet 17 and bottom panel 4 to which
35 the edges of the cap plate 23 are welded as best shown
in the drawing:
FIGURE l is a side elevation `of a storage tank em
in FIG. 4.
bodying the invention;
.
The end panels 7 are designed for convenient and
FIG. 2 is a top plan View of a portion of the tank with
economical manufacture as the several sections of each
parts broken away;
panel may be formed by relatively simple and conven
40 tional type means. l1Furthermore the end panels by rea
IFiG. 3 is an end elevation of the tank;
FIG. 4 is an enlarged fragmentary view of the lower
son of their contour provide the desired reinforcement
end portion of the container;
for the tank without the need for reinforcing ribs or the
FIG. 5 is an enlarged fragmentary section of the lower
like.
end portion of the container shown in FIG. 3 with parts
Side panels 5 and bottom panel Il are reinforced by the
broken away; and
FiG. 6 is a transverse section through the side wall
spaced, flanged and channel-shaped reinforcing ribs 24,
with the ribs of each side panel being aligned with and
of the tank and showing the rib construction.
Referring to the drawings, and particularly to FIG
secured to the corresponding ribs on the bottom panel
such that the connected ribs form a rigid supporting brace
URES l-3, the storage tank 1 is mounted on a base com
for the lower half of the tank. The ribs are provided
prised of a plurality of I-beams 2 which rest on adjust~
with beveled ends 2S with the ends of the ribs disposed
50
able supports 3 for purposes of drainage.
on bottom panel 4 and the lower ends Of the ribs on side
The tank includes a rectangular bottom panel ¿l and
panel 5 extending diagonally outwardly from the flanges
a pair of rectangular side panels 5 joined by a generally
26 and with the upper ends of the latter ribs extending
curved top panel 6. The ends of the tank are closed by
diagonally inwardly from ñanges in the manner shown
a pa‘ir of end panels 7.
in FIGS. 3 and 5.
The tank is preferably constructed `of a corrosion re 55
Ribs 2li are preferably constructed of the same alloy
sistant material, such as stainless steel, and due to the con
as the tank panels and the flanges 26 or ribs 24 are secured
struction of the tank a minimum thickness of such ma
terial is required to withstand the pressure of the con
tained lluid and the internal gas pressure generated there
by.
For economy and convenience in fabrication and assem
bly, each side panel is comprised of a plurality of sections
3 which are joined by a weld along the vertical seams 9.
The assembled side panels are welded to bottom panel 4
by spot welds 27 to the corresponding panels of the tank.
The ribs may be reinforced by a thin plate 28 welded to
60 the web of the ribs on the inside.
v
The aligned ribs 24 on the bottom and side panels are
joined by the corner members 29. In general, each cor
ner member 29 is channel-shaped having a web 36 and a
pair of side pieces 31 extending outwardly from the web.
and top panel 6 by longitudinal welds 10 and 11, respec 65 The side pieces widen or diverge in their extent from web
Si), and the ends 32 of the side pieces are concave to con
tively. As shown in FIG. 5', the bottom panel 4 is curved
form substantially to the contoured or rounded edge 12
upwardly along the longitudinal edge thereof to form a
of the tank to which they are welded when installed.
rounded corner portion 12 extending substantially the
Side pieces 31 of corner members 29 over-lap and are
length of the assembled tank, The top and bottom panels
welded to the diagonally extending ends 25 or ribs 24,
are each comprised `of half sections, welded together
and the web 30 or corner member 29 is similarly secured
along the seams 13 and 14 respectively.
3s
¿i
to the terminal edge 33 of the corresponding rib 24. The
corner members 29 thus provide a strong, integral joint
tegral rib members extending around the lower portion
etween the ribs 24 and are securely attached to the tank
proper.
To reinforce each corner member 29, a strip 34 is
welded flatwise to the inside of web 30. Additional strips
35 are edge-welded to the side pieces 31 and to web 3i)
of the corner member 29.
To provide further reinforcement at the juncture of the
ribs 24 and the corner members Z9, plates 36 are edge
Welded to the inside of each rib at its terminal end along
the web and sides thereof. The reinforced corner mem
of the tank, said end and top walls being free of said rib
members.
2. A thin-walled container or the like, comprising rec
tangular side panels and a rectangular bottom panel hav
ing its longitudinal edges curved upwardly and welded
to the adjoining edges of said side panels to form a
rounded corner portion extending the length of the con
tainer, a top panel having a semi-circular transverse cross
sectional area welded to the adjoining edges of said side
panels, end panels welded to the respective adjoining edges
of said top, ide and bottom panels to provide a closed
bers 2% and the plates 36 thus provide maximum rein
container with each of said end panels being comprised of
forcement at the bottom of the tank as the pressure ex
a semi-circular upper section having a generally convex
shape, a curved lower section, and a substantially flat
erted by the contained fluid is at a maximum in that area.
Similar plates 36 are welded to the inside of the vertical
bottom section having an arcuate, upwardly curved outer
edge, a plurality of rib members disposed on the external
ribs at their upper end to close the ends of the ribs.
surface of said side panels and similar rib members disReinforcement in the form of a curved plate 37, con
posed on said bottom panel in alignment with said first
nected to ribs 24 by a plurality of cross plates 3S, is pro
vided on bottom section Ztl of each end panel.
20 mentioned rib members, the ends of each of said members
being beveled and spaced from the beveled end of the cor
A manway 39 having a hinged cover 40 is provided in
end panel 7 to provide access to the inside of the tank.
responding aligned rib member, edge pieces attached be
The tank is further provided with a suitable drain connec
tween a pair of aligned rib members, said edge pieces
being provided with an outer web portion and side walls
tion ¿il which is secured to the bottom panel of the tank.
Other necessary piping connections, not shown, are also 25 extending inwardly from said web and having an inner
provided.
end shaped to conform to the rounded corner portion of
In the assembly of the tank, the ribs 24 are initially
said container, welds joining the edges of each of the side
Walls and the web of said edge pieces to the adjoining
welded in spaced relation to each of the individual sec
tions of the panels 4 and ‘5. The panels are then assem
edges of said rib members and joining the inner end of
bled in the manner and sequence previously outlined. 30 each of the side walls of said edge pieces to the container
to provide a plurality of integral rib members extending
Corner members 29, which are suf'llciently flexible to cor
rect for minor errors in alignment of the ribs, are then
around the lower portion of the tank, said top and end
placed in position between the respective adjoining ends
panels being free of said rib members, a curved plate
of the ribs and welded to the ribs and to the tank.
The invention provides a thin walled storage tank which
holds the requirement of the alloy material and labor in
put to a minimum and yet will withstand considerable
pressure 1n service.
welded in edge-wise relation to the bottom section of each
end panel, and a plurality of transversely spaced plates
disposed in edge-wise relation to the bottom section of
each end panel and extending between and welded to said
first mentioned plate and the outer rib members on said
bottom panels.
The invention further provides a storage tank having
curved corner portions in all instances thus facilitating 40
3. A thin-walled container or the like, comprising side
cleaning of the tank and reducing maintenance costs.
panels and a bottom panel welded together along their
Various methods of carrying out the invention are
adjoining edges, a top panel having a semi-circular trans
contemplated as being within the scope of the various
verse cross-sectional area welded to the adjoining edges
claims distinctly claiming and particularly pointing out
of said side panels, end panels secured to the respective
the subject-matter regarded as the invention:
adjoining edges of said top, side and bottom panels to
l claim:
provide a closed container, with each of said end panels
being comprised of a semi-circular upper section having
l. A thin walled container or the like, comprising sub
stantially flat rectangular side walls and a substantially flat
an outwardly curved surface contour, a lower generally
rectangular bottom wall having its longitudinal edges
curved section, and an arcuate shaped bottom section hav
curved upwardly and welded to the adjoining edges of
ing an upwardly curved outer edge, a plurality of flanged
said side walls to form a rounded edge extending the
channel-shaped rib members disposed on the external
length of the container, a top wall having a semi-circular
surfaces of said side panels and a plurality of similar
transverse cross-sectional area welded to the adjoining
members disposed on said bottom panel in alignment
edges of said side walls, end walls welded to the respec
with the first-mentioned rib members, with the ends of
tive adjoining edges of said top, side and bottom walls to
said rib members being spaced from the corresponding
provide a closed container with each of said end walls
lower ends of said first-mentioned rib members, the spaced
being comprised of a semi-circular upper panel having
ends of said first and second mentioned rib members being
provided with an outer web portion extending forwardly
an outwardly dished contour, a generally curved lower
panel, and a generally flat bottom panel having an arcu
of the flanges of said ribs and connected to said flanges
ate, upwardly curved outer edge, a plurality of rib mem 60 by diagonally extending sides to form a beveled end on
bers disposed on the external surface of said side wall and
each of said spaced rib ends, and with the upper ends of
similar rib members disposed on said bottom wall in
said first-mentioned rib members being provided with an
alignment with said first mentioned rib members, the ends
of each of said members being beveled and spaced from
the beveled end of the corresponding aligned rib member,
edge pieces attached between the ends of aligned rib
members, said edge pieces being provided with an outer
web portion and side walls extending inwardly from said
outer web portion terminating rearwardly of the flanges
of said ribs and connected thereto by diagonally extending
sides to form a beveled end, reinforcing plates edge
welded to the inside of each of the beveled ends of said
web and having an inner end shaped to conform to the
rib members, corner pieces disposed between each pair
of spaced rib ends with said corner piece being provided
with a web and divergent, inwardly extending side pieces,
rounded edge of said container, and welds joining the
edges of each of the side walls and the web of said edge
pieces to the adjoining edges of said rib members and
joining the inner end of each of the side walls of said
edge pieces to the container to provide a plurality of in
and welds securing the web and side pieces of said corner
piece to the corresponding beveled ends of said rib mem
bers and securing the ends of the side pieces of said cor
ner pieces to the container to provide continuous rib
members extending around the lower portion of the con
3,024,942
6
tainer, said top and end panels being free of said rib
members.
References Cited in the ñle of this patent
UNITED STATES PATENTS
192,310
Tippett et al ........... -_ June 19, 1877
5
983,440
2,097,113
2,160,360
2,477,831
2,638,138
2,675,940
Harry ________________ __ Feb. 7,
Bradley _______________ ._ Oct. 26,
Hassan ______________ _.. May 30,
Schmitz ______________ __ Aug. 2,
Proebstle ____________ .__ May 12,
Schmitz _____________ .__ Apr. 20,
1911
1937
1939
1949
1953
1954
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