CA1044424A - Silo having a cylindrical wall - Google Patents
Silo having a cylindrical wallInfo
- Publication number
- CA1044424A CA1044424A CA285,334A CA285334A CA1044424A CA 1044424 A CA1044424 A CA 1044424A CA 285334 A CA285334 A CA 285334A CA 1044424 A CA1044424 A CA 1044424A
- Authority
- CA
- Canada
- Prior art keywords
- flange
- sheets
- curved
- straight
- edge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Abstract
ABSTRACT OF THE DISCLOSURE
A silo having a cylindrical wall is constructed from substantially rectangular, slightly cylindrically curved, flanged sheets provided all around with bolt holes. At least one straight side of each of said sheets is not provided with a flange, while at least one other side is flanged.
A silo having a cylindrical wall is constructed from substantially rectangular, slightly cylindrically curved, flanged sheets provided all around with bolt holes. At least one straight side of each of said sheets is not provided with a flange, while at least one other side is flanged.
Description
10~4429~
SPECIFICATION
This application is a division of my Canadian application Serial No, 232, 030, filed July 22, 1975, The invention relates to a silo having a cylindrical wall, which is constructed from substantially rectangular, slightly cylindrically curved, flanged sheets provided with bolt holes, Hithereto it has been common practice to provide these sheets on four sides with flanges, which have bores for the relative fastening by means of bolts or rivets. The flanges serve at the same time for stiffening the silo. To avoid tangential forces produced in the cylindrical wall the vertical flanges bending the sheets near the bolt holes,flanges have been stiffened by rugged ~- strips on either side thereof.
It is an bbject of the invention to omit such strips, not only -to achieve an important saving of material but also to effect a -~ -considerable reduction in weight of the entire silo.
' To this end according to the invention at least on one -straight side the sheets are not provided with a flange and on at , least one other side the sheets are provided with a flange. On the flange-free sides the sheets can be secured to the adjacent sheet by means of an overlapping seam. The sheets are preferably - ~-provided on only two adjacent sides with flanges, w hich prevent the sheets from bending but which have no function in securing the sheets to one another. - -1~ order to simplify the shape of the sheets to the optimum, which facilitates the manul~cture thereof, it is advisable to cause ~e curved, flanged eide of the sheets to diverge with respect to the raw o~ bolt holee on the opposite side to an extent such that the di tance between mem on the etraight side without a flange is larger than on the oppoeite eide by the thickness of the sheet.
_2-... .. . .. ... .
` 1~4~/~2~
To facilitate mounting it is furthermore advantageous to cause the rows of bolt holes along the straight sides of the sheets to diverge to an extent such that with a number of sheets assembled into a ring the inner diameter on one side of the ring is equal to the outer diameter on the other side thereof.
To reduce leaks in the silo wall or the quantity of sealing material to 6e employed each sheet may be depressed at two opposite corners by the thickness of the material. However, in a simpler manner each sheet is depressed over a distance corresponding to the thickness of the material at the corner without flanges and approximately midway the curved side without flange.
Since on the straight side the flange is mainly subjected to buckling forces it may be provided with a tag bent back approximately parallel to the sheet to enhance its resistance to buckling.
The silo of the invention may be generally defined as a circular silo having a cylindrical wall comprising substantially rectangular, ~ ---slightly cylindrically curved flanged sheets provided with bolt holes, each flanged sheet having first and second straight edges opposite one another and first and second curved edges opposite one another. The first curved edge has a substantially perpendicular flange and the second curved edge has no flange. The first straight edge has a substantially perpendicular flange and the second straight edge has no flange. A plurality of said ;-sheets is assembled laterally with first straight edges overlapping second ~ -straight edges in shingle-like fashion. Additional sheets are assembled vertically with first curved edges overlapping second curved edges in shingle-like fashion. The flange on the first straight edge has one end extending to the flange on the first curved edge and another end terminating short of the second curved edge by a distance sufficient to permit overlapping ~ -by first curved and flanged edges of adjacent sheets.
The invention will hereinafter be described with reference to the drawing.
Fig. 1 is an elevational view of a wall portion of the silo .
--- 10~442g according to the invention.
Fig. 2 is an enlarged view of a detail of Fig. 1.
Fig. 3 is an enlarged sectional view taken on line III-III in Fig. 1.
Fig. 4 is an enlarged sectional view taken on the line IV-IV in Fig. 1.
Fig. 5 is an elevational view of part of the wall of the silo in a modified embodiment.
Fig. 6 is an elevational view of a sheet for use in a silo.
Fig. 7 is a sectional view taken on the line VII-VII in Fig. 6.
- 3a -104~2~
Fig. 8 is partly a sectional view of a set of relatively fitting sheets of the kind shown in Fig. 1.
Fig. 9 is a sectional view of a set of relatively fitting sheets taken on the line IX-IX in Fig. 8.
The cylindrical silo wall according to the invention is constructed from substantially rectangular, slightly cylindrically curved sheets provided with flanges. In the embodiment shown in ~ ~ ~
Fig. 1 the sheets 1 are provided on two curved sides on one -straight side with flanges 20, 21, 22, whereas the other ctraight side is not provided with a flange. The flanges 20, 21 on the curved sides have bolt holes for fastening to higher and lower sheets 1, respective-ly. This mode of fastening is shown on an enlarged scale in Fig. 4, in which two sheets l~ngaging one another by the flanges 21 and 20 are secured to each other by means of bolts 19 passing through the holes in said flanges 20, 21. The sheets 1 are horizontally connected by means of overlapping seams as shown on an enlarged scale in the sectional view of Fig. 3, where the flange 22 only -serves for enhancing the resistance to buckling. This flange 22 is pro-vided at both ends with bent-over tags 30, engaging the depressed flanges 20 and 21 and being secured thereto by means of a bolt 19 as is clearly shown in Fig. 2. As a matter of course, the bent-over tags 30 of the flange 22 may also be connected by a welding seam with the depressed flanges 20 and 21.
To restrict the volume of the silo parts during transport the cylinder is preferably constructed from at least two groups of ~heets 1, in which groups the distance between the flanges 20, 21 on the curved side~ differs by slightly more than twice the thicknes~
of the material from that in a further group. ~igs. 8 and 9 are ,1 ,,, 10~2~
sectional views of three sheets 1 associated with different groups, The arc length of the three sheets is the same, but the height is each time more than twice the thickness of the material smaller so that in transport the three sheets l fit into one another, When 5 erecting the silo rings of sheets 1 having equal heights are assembled.
A further possibility of restricting the transported volume resides in that the sheets are provided only on two adjacent sides with flanges, which prevent sagging of the sheets, but which do not serve in their relative connection. Fig. 5 shows part of the silo lO wall assembled from such sheets 23. This sheet 23 is shown in an elevational view in Fig. 6 and in a horizontal sectional vi~w in Fig. 7. The sheet 23 is provided on one straight side with a flange 24, which has at both ends a bent-over tag 25 and on one adjacent, curved side it is provided with a flange 26. This flange 26 is provided 15 at both ends and at the centre with a bolt hole. The two tags 25 are also provided with a bolt hole. The further bolt holes for Joining the sheets 23 are provided in the rims of the main portion of the sheet 23. By disposing the flanges 26 in a slightly inclined position ` relative to the row of bolt holes on the opposite side so that me 20 distance between them on the straight side without flange exceeds that ~ -on the other side by one thickness of the sheet, the flanges 26 when being joined can be arranged in a roof-tile fashion one on the other as is shown in Fig. 5. The row of bolt holes at the side of the flange 24 and the opposite row of bolt holes diverge to an extent 25 such that when a number of sheets are assembled to form a ring, ~e inner diameter on one side of the ring is equal to the outer diameter on the other side thereof. Figs. 6 and 7 show that the flange 24 is stiffened on the straight side by a tag 27 bent back ,, - . . . .
4~Z~
approximately parallel to the main portion of the sheet and en- ' hancing further the resistance of the flang~ to buckling, The sheet 23 shown in Fig, 6 may be depressed on diagonally opposite corners. In a simpler manner, however, the sheet 23 may be depressed at the left-hand top corner and slightly to the left of the center on the top side.
,' ~
., , .
~J
SPECIFICATION
This application is a division of my Canadian application Serial No, 232, 030, filed July 22, 1975, The invention relates to a silo having a cylindrical wall, which is constructed from substantially rectangular, slightly cylindrically curved, flanged sheets provided with bolt holes, Hithereto it has been common practice to provide these sheets on four sides with flanges, which have bores for the relative fastening by means of bolts or rivets. The flanges serve at the same time for stiffening the silo. To avoid tangential forces produced in the cylindrical wall the vertical flanges bending the sheets near the bolt holes,flanges have been stiffened by rugged ~- strips on either side thereof.
It is an bbject of the invention to omit such strips, not only -to achieve an important saving of material but also to effect a -~ -considerable reduction in weight of the entire silo.
' To this end according to the invention at least on one -straight side the sheets are not provided with a flange and on at , least one other side the sheets are provided with a flange. On the flange-free sides the sheets can be secured to the adjacent sheet by means of an overlapping seam. The sheets are preferably - ~-provided on only two adjacent sides with flanges, w hich prevent the sheets from bending but which have no function in securing the sheets to one another. - -1~ order to simplify the shape of the sheets to the optimum, which facilitates the manul~cture thereof, it is advisable to cause ~e curved, flanged eide of the sheets to diverge with respect to the raw o~ bolt holee on the opposite side to an extent such that the di tance between mem on the etraight side without a flange is larger than on the oppoeite eide by the thickness of the sheet.
_2-... .. . .. ... .
` 1~4~/~2~
To facilitate mounting it is furthermore advantageous to cause the rows of bolt holes along the straight sides of the sheets to diverge to an extent such that with a number of sheets assembled into a ring the inner diameter on one side of the ring is equal to the outer diameter on the other side thereof.
To reduce leaks in the silo wall or the quantity of sealing material to 6e employed each sheet may be depressed at two opposite corners by the thickness of the material. However, in a simpler manner each sheet is depressed over a distance corresponding to the thickness of the material at the corner without flanges and approximately midway the curved side without flange.
Since on the straight side the flange is mainly subjected to buckling forces it may be provided with a tag bent back approximately parallel to the sheet to enhance its resistance to buckling.
The silo of the invention may be generally defined as a circular silo having a cylindrical wall comprising substantially rectangular, ~ ---slightly cylindrically curved flanged sheets provided with bolt holes, each flanged sheet having first and second straight edges opposite one another and first and second curved edges opposite one another. The first curved edge has a substantially perpendicular flange and the second curved edge has no flange. The first straight edge has a substantially perpendicular flange and the second straight edge has no flange. A plurality of said ;-sheets is assembled laterally with first straight edges overlapping second ~ -straight edges in shingle-like fashion. Additional sheets are assembled vertically with first curved edges overlapping second curved edges in shingle-like fashion. The flange on the first straight edge has one end extending to the flange on the first curved edge and another end terminating short of the second curved edge by a distance sufficient to permit overlapping ~ -by first curved and flanged edges of adjacent sheets.
The invention will hereinafter be described with reference to the drawing.
Fig. 1 is an elevational view of a wall portion of the silo .
--- 10~442g according to the invention.
Fig. 2 is an enlarged view of a detail of Fig. 1.
Fig. 3 is an enlarged sectional view taken on line III-III in Fig. 1.
Fig. 4 is an enlarged sectional view taken on the line IV-IV in Fig. 1.
Fig. 5 is an elevational view of part of the wall of the silo in a modified embodiment.
Fig. 6 is an elevational view of a sheet for use in a silo.
Fig. 7 is a sectional view taken on the line VII-VII in Fig. 6.
- 3a -104~2~
Fig. 8 is partly a sectional view of a set of relatively fitting sheets of the kind shown in Fig. 1.
Fig. 9 is a sectional view of a set of relatively fitting sheets taken on the line IX-IX in Fig. 8.
The cylindrical silo wall according to the invention is constructed from substantially rectangular, slightly cylindrically curved sheets provided with flanges. In the embodiment shown in ~ ~ ~
Fig. 1 the sheets 1 are provided on two curved sides on one -straight side with flanges 20, 21, 22, whereas the other ctraight side is not provided with a flange. The flanges 20, 21 on the curved sides have bolt holes for fastening to higher and lower sheets 1, respective-ly. This mode of fastening is shown on an enlarged scale in Fig. 4, in which two sheets l~ngaging one another by the flanges 21 and 20 are secured to each other by means of bolts 19 passing through the holes in said flanges 20, 21. The sheets 1 are horizontally connected by means of overlapping seams as shown on an enlarged scale in the sectional view of Fig. 3, where the flange 22 only -serves for enhancing the resistance to buckling. This flange 22 is pro-vided at both ends with bent-over tags 30, engaging the depressed flanges 20 and 21 and being secured thereto by means of a bolt 19 as is clearly shown in Fig. 2. As a matter of course, the bent-over tags 30 of the flange 22 may also be connected by a welding seam with the depressed flanges 20 and 21.
To restrict the volume of the silo parts during transport the cylinder is preferably constructed from at least two groups of ~heets 1, in which groups the distance between the flanges 20, 21 on the curved side~ differs by slightly more than twice the thicknes~
of the material from that in a further group. ~igs. 8 and 9 are ,1 ,,, 10~2~
sectional views of three sheets 1 associated with different groups, The arc length of the three sheets is the same, but the height is each time more than twice the thickness of the material smaller so that in transport the three sheets l fit into one another, When 5 erecting the silo rings of sheets 1 having equal heights are assembled.
A further possibility of restricting the transported volume resides in that the sheets are provided only on two adjacent sides with flanges, which prevent sagging of the sheets, but which do not serve in their relative connection. Fig. 5 shows part of the silo lO wall assembled from such sheets 23. This sheet 23 is shown in an elevational view in Fig. 6 and in a horizontal sectional vi~w in Fig. 7. The sheet 23 is provided on one straight side with a flange 24, which has at both ends a bent-over tag 25 and on one adjacent, curved side it is provided with a flange 26. This flange 26 is provided 15 at both ends and at the centre with a bolt hole. The two tags 25 are also provided with a bolt hole. The further bolt holes for Joining the sheets 23 are provided in the rims of the main portion of the sheet 23. By disposing the flanges 26 in a slightly inclined position ` relative to the row of bolt holes on the opposite side so that me 20 distance between them on the straight side without flange exceeds that ~ -on the other side by one thickness of the sheet, the flanges 26 when being joined can be arranged in a roof-tile fashion one on the other as is shown in Fig. 5. The row of bolt holes at the side of the flange 24 and the opposite row of bolt holes diverge to an extent 25 such that when a number of sheets are assembled to form a ring, ~e inner diameter on one side of the ring is equal to the outer diameter on the other side thereof. Figs. 6 and 7 show that the flange 24 is stiffened on the straight side by a tag 27 bent back ,, - . . . .
4~Z~
approximately parallel to the main portion of the sheet and en- ' hancing further the resistance of the flang~ to buckling, The sheet 23 shown in Fig, 6 may be depressed on diagonally opposite corners. In a simpler manner, however, the sheet 23 may be depressed at the left-hand top corner and slightly to the left of the center on the top side.
,' ~
., , .
~J
Claims (3)
1. A circular silo having a cylindrical wall, com-prising:
a) substantially rectangular, slightly cylindrically curved flanged sheets provided with bolt holes, each flanged sheet having first and second straight edges opposite one another and first and second curved edges opposite one another;
b) the first curved edge having a substantially perpendicular flange and the second curved edge having no flange;
c) the first straight edge having a substantially perpendicular flange and the second straight edge having no flange;
d) a plurality of said sheets being assembled laterally with first straight edges overlapping second straight edges in shingle-like fashion;
e) additional sheets being assembled vertically with first curved edges overlapping second curved edges in shingle-like fashion; and f) the flange on the first straight edge has one end extending to the flange on the first curved edge and another end terminating short of the second curved edge by a distance sufficient to permit overlapping by first curved and flanged edges of adjacent sheets.
a) substantially rectangular, slightly cylindrically curved flanged sheets provided with bolt holes, each flanged sheet having first and second straight edges opposite one another and first and second curved edges opposite one another;
b) the first curved edge having a substantially perpendicular flange and the second curved edge having no flange;
c) the first straight edge having a substantially perpendicular flange and the second straight edge having no flange;
d) a plurality of said sheets being assembled laterally with first straight edges overlapping second straight edges in shingle-like fashion;
e) additional sheets being assembled vertically with first curved edges overlapping second curved edges in shingle-like fashion; and f) the flange on the first straight edge has one end extending to the flange on the first curved edge and another end terminating short of the second curved edge by a distance sufficient to permit overlapping by first curved and flanged edges of adjacent sheets.
2. The silo of claim 1 wherein the flange on the first straight edge of the sheets has a strengthening bent-over portion parallel with the first straight edge.
3. The silo of claim 1 wherein the flange on the first straight edge of the sheets has bent tags perpendicular to the flange at each end thereof as a fastening surface to other flanges.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL747409901A NL151878B (en) | 1974-07-22 | 1974-07-22 | CYLINDRICAL SILO. |
| CA232,030A CA1026258A (en) | 1974-07-22 | 1975-07-22 | Silo having a cylindrical wall comprising a discharge device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1044424A true CA1044424A (en) | 1978-12-19 |
Family
ID=25668032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA285,334A Expired CA1044424A (en) | 1974-07-22 | 1977-08-23 | Silo having a cylindrical wall |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1044424A (en) |
-
1977
- 1977-08-23 CA CA285,334A patent/CA1044424A/en not_active Expired
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