EP0060084B1 - Storage tank - Google Patents
Storage tank Download PDFInfo
- Publication number
- EP0060084B1 EP0060084B1 EP82301079A EP82301079A EP0060084B1 EP 0060084 B1 EP0060084 B1 EP 0060084B1 EP 82301079 A EP82301079 A EP 82301079A EP 82301079 A EP82301079 A EP 82301079A EP 0060084 B1 EP0060084 B1 EP 0060084B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bag
- tank
- storage tank
- ribs
- walls
- 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
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 15
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 239000003651 drinking water Substances 0.000 abstract description 3
- 235000020188 drinking water Nutrition 0.000 abstract description 3
- 239000010865 sewage Substances 0.000 abstract 1
- 239000004744 fabric Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 229920002681 hypalon Polymers 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000000384 rearing effect Effects 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/12—Supports
- B65D90/20—Frames or nets, e.g. for flexible containers
- B65D90/205—Frames or nets, e.g. for flexible containers for flexible containers, i.e. the flexible container being permanently connected to the frame
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/16—Large containers flexible
Definitions
- This invention relates to storage tanks and particularly to tanks for storing large quantities of liquid such as swimming pools, reservoirs of drinking water, fish rearing tanks etc.
- a drinking water reservoir to be constructed in a remote location requires materials that are easily transported. It is however desirable that the flexible material should be able to collapse inwardly when the tank is empty, otherwise it will be vulnerable to wind damage. Furthermore, the flexible material should fold inwardly without such crumpling or creasing that causes folds of materials to be trapped when the tank is refilled.
- United Kingdom Patent Specification No. 578,855 dicloses a flexible container of the type indicated in the prior art portion of claim 1.
- the container which is designed for the storage of a bulk quantity of liquids such as petrol, is in the form of flexible liquid-containing envelope or bag which collapses inwardly when empty. When the bag is filled the walls of the container are raised outwardly.
- the container disclosed is however relatively low and long in relation to its base area, making it suitable for transportation. Such relative dimensions are not appropriate for many other liquid storage tanks where it is necessary to both reduce the floor space occupied by the tank or minimise the liquid surface area to reduce evaporation.
- the lower containers are described in the aforementioned specification are subject to the problem that the wall of the container will fold as it collapses. These folds remain when the container is filled, being trapped by the liquid.
- the present invention is characterised by the inclusion in the collapsible walls of the bag of a plurality of horizontally-spaced rigid or semi-rigid ribs fastened thereto and extending generally up the wall or walls, thereby acting to prevent trapped folds in the bag as the tank is filled.
- the construction of a water storage tank is begun with the assembly of a circular steel wire surrounding wall 1.
- the steel wire is preferably of the galvanised, welded form sold under the trade mark "Weldmesh" which can be transported in rolls typically 3 feet (0.91 m) wide and 3 feet (0.91 m) in diameter.
- the circular wall 1 formed from the wire mesh is located and fixed by means of a number of wooden posts 2 which are driven into the ground adjacent the outer surface of the wire mesh wall 1, the wire mesh being stapled to the posts. Where the ground is uneven, the top edge of the wall 1 is levelled by sinking the bottom edge into small trenches where necessary e.g. the trench 3.
- the wall 1 is completed when two ends of wire mesh from the roll are joined together.
- a large, closed cylindrical lining bag 5 is positioned within the circular wire mesh wall 1.
- the liner is made from flexible material such as PVC-coated polyester cloth, hypalon-coated nylon cloth or other similar material which is chosen to suit the type of liquid that the container is intended to hold.
- the liner 5 is secured to the post 2 at ground level but is not connected to the wire mesh wall 1 so that when the tank is empty is will tend to collapse inwardly.
- a number of lengths of polythene piping 6 or other rigid or semi-rigid members are fastened to the side of the lining material 5 and when the tank is full these pipes 6 are upright.
- the pipes 6 may be connected to the flexible material along their lengths, or alternatively a number of pockets 5a may be formed in the lining into respective ones of which the pipes can be inserted.
- Figure 3 illustrates the manner in which the pipes 6 bend and support the side wall of the lining when the tank is partially full. This illustration shows an open-topped version of the tank.
- the outlet for liquid from the tank is provided in the bottom surface of the flexible liner by an outlet orifice cut from the bottom of the liner.
- a flange 7 is located over the orifice on the inside of the tank and this is in register with a flange 8 which is located beneath the lower surface of the tank opposite the flange 7.
- the flanges are then screwed or bolted together with lining material surrounding the orifice being held between them.
- the lower flange 8 has permanently connected to it an elbow pipe fitting 9 situated beneath ground level.
- a flexible suction hose 10 is connected to the fitting 9 and extends out from under the edge of the tank. The material of the hose 10 is chosen to be compatible with the liquid stored in the tank.
- a wooden post 11 stands up next to the tank and supports the upright portion of the hose 10.
- the upright portion of the hose 10 may be connected to the post 11 by a short chain 12 at its upper end.
- the hose thus secured has its open end above the level of liquid in a tank and the pipe may then be used for filling or emptying if the chain 12 is unlocked.
- This arrangement avoids the need for a stop valve but in an alternative version the post 11 is replaced by a stop valve.
- the hose is connected to a more elaborate pipe system.
- a simple system is provided which can be installed by unskilled persons.
- the top surface of the flexible liner has an opening 13 which is directly above the orifice enabling the internal flange 7 to be readily located.
- the opening 13 has connected around it a fabric sleeve 14 which is closed by clamping bars.
- a polystyrene cylinder 20 having an outside diameter to permit it to slide as a close fit into the sleeve 14 is used as a plug and secured by a clamping band 21 around the sleeve.
- the cylinder 20 is arranged to project down below the lower end of the sleeve so that the lid or cover of the tank is slightly raised at this place to encourage air to move to this spot.
- the polystyrene cylinder 20 has a central axial bore 22 through it, which intersects several radial bores 23 made at the level of the lid or cover of the tank, thus allowing trapped air to vent freely to atmosphere.
- a simple mushroom type cover 24 may be fixed on top of the plug to stop rain water or pollutants entering the vent.
- the fabric sleeve could in an alternative version be replaced by a rigid inspection cover but whatever arrangement is used, it should permit ventilation of gas or air particularly when the tank is being filled.
- a storage tank in accordance with the invention may be constructed with rigid ribs 6, for example, wooden battens, in place of the polythene tubes in the example described above.
- rigid ribs 6 for example, wooden battens
- Such rigid members do not bend and peel away from the support wall when the tank is emptied but tilt inwardly. It has been found that in most applications the semi-rigid bendable ribs are preferable.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Packages (AREA)
- Developing Agents For Electrophotography (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Bag Frames (AREA)
Abstract
Description
- This invention relates to storage tanks and particularly to tanks for storing large quantities of liquid such as swimming pools, reservoirs of drinking water, fish rearing tanks etc.
- There are many occasions when it is desirable to construct a large water storage enclosure from flexible, light-weight material such as PVC-coated polyester cloth. For example, a drinking water reservoir to be constructed in a remote location requires materials that are easily transported. It is however desirable that the flexible material should be able to collapse inwardly when the tank is empty, otherwise it will be vulnerable to wind damage. Furthermore, the flexible material should fold inwardly without such crumpling or creasing that causes folds of materials to be trapped when the tank is refilled.
- United Kingdom Patent Specification No. 578,855 dicloses a flexible container of the type indicated in the prior art portion of
claim 1. The container which is designed for the storage of a bulk quantity of liquids such as petrol, is in the form of flexible liquid-containing envelope or bag which collapses inwardly when empty. When the bag is filled the walls of the container are raised outwardly. - The container disclosed is however relatively low and long in relation to its base area, making it suitable for transportation. Such relative dimensions are not appropriate for many other liquid storage tanks where it is necessary to both reduce the floor space occupied by the tank or minimise the liquid surface area to reduce evaporation. In general such containers, and to a more limited extent the lower containers are described in the aforementioned specification are subject to the problem that the wall of the container will fold as it collapses. These folds remain when the container is filled, being trapped by the liquid.
- The present invention is characterised by the inclusion in the collapsible walls of the bag of a plurality of horizontally-spaced rigid or semi-rigid ribs fastened thereto and extending generally up the wall or walls, thereby acting to prevent trapped folds in the bag as the tank is filled.
- An embodiment of the invention will now be described by way of example only, with reference to the accompanying drawings. In the drawings:-
- Figure 1 is a plan view of a circular tank in accordance with the present invention;
- Figure 2 is a side elevation view of the tank with part of the wall shown cut away;
- Figure 3 is a schematic illustration of a tank, partially full of liquid;
- Figure 4 is a plan view of an alternative fabric sleeve opening to the tank; and
- Figure 5 is a view in elevation and partial cross- section on the line X-X of Figure 3.
- Referring to the figures, the construction of a water storage tank is begun with the assembly of a circular steel
wire surrounding wall 1. The steel wire is preferably of the galvanised, welded form sold under the trade mark "Weldmesh" which can be transported in rolls typically 3 feet (0.91 m) wide and 3 feet (0.91 m) in diameter. Thecircular wall 1 formed from the wire mesh is located and fixed by means of a number ofwooden posts 2 which are driven into the ground adjacent the outer surface of thewire mesh wall 1, the wire mesh being stapled to the posts. Where the ground is uneven, the top edge of thewall 1 is levelled by sinking the bottom edge into small trenches where necessary e.g. thetrench 3. Thewall 1 is completed when two ends of wire mesh from the roll are joined together. This is accomplished with the use of two joiningbars 4 which are disposed vertically with respect to thewall 1. The two joiningbars 4 face one another on opposite sides of the overlapping ends of the wire and are bolted together through the wire mesh. Since hoop tensions are greatest at the bottom of the tank and are zero at the liquid surface, the spacing of the bolts needs to be closer at the bottom than it does towards the top of the tank. - A large, closed
cylindrical lining bag 5 is positioned within the circularwire mesh wall 1. The liner is made from flexible material such as PVC-coated polyester cloth, hypalon-coated nylon cloth or other similar material which is chosen to suit the type of liquid that the container is intended to hold. Theliner 5 is secured to thepost 2 at ground level but is not connected to thewire mesh wall 1 so that when the tank is empty is will tend to collapse inwardly. - A number of lengths of
polythene piping 6 or other rigid or semi-rigid members are fastened to the side of thelining material 5 and when the tank is full thesepipes 6 are upright. Thepipes 6 may be connected to the flexible material along their lengths, or alternatively a number ofpockets 5a may be formed in the lining into respective ones of which the pipes can be inserted. When the tank is emptied, the sides of theliner 5 still collapse inwardly but do not crumple since they are kept extended by thepipes 6. Thepolythene pipes 6 bend inwardly under the unsupported weight of the exposed lining walls as the tank is emptied. The lining is thus peeled away from thewall 1. When the tank is refilled the lining unrolls against the wall and thepipes 6 straighten so that creases do not form and therefore folds of lining material do not get trapped by the introduced liquid. - Figure 3 illustrates the manner in which the
pipes 6 bend and support the side wall of the lining when the tank is partially full. This illustration shows an open-topped version of the tank. - The outlet for liquid from the tank is provided in the bottom surface of the flexible liner by an outlet orifice cut from the bottom of the liner. A
flange 7 is located over the orifice on the inside of the tank and this is in register with a flange 8 which is located beneath the lower surface of the tank opposite theflange 7. The flanges are then screwed or bolted together with lining material surrounding the orifice being held between them. The lower flange 8 has permanently connected to it an elbow pipe fitting 9 situated beneath ground level. Aflexible suction hose 10 is connected to the fitting 9 and extends out from under the edge of the tank. The material of thehose 10 is chosen to be compatible with the liquid stored in the tank. A wooden post 11 stands up next to the tank and supports the upright portion of thehose 10. The upright portion of thehose 10 may be connected to the post 11 by ashort chain 12 at its upper end. The hose thus secured has its open end above the level of liquid in a tank and the pipe may then be used for filling or emptying if thechain 12 is unlocked. This arrangement avoids the need for a stop valve but in an alternative version the post 11 is replaced by a stop valve. In another alternative version, the hose is connected to a more elaborate pipe system. However, in the embodiment described above, a simple system is provided which can be installed by unskilled persons. - In the closed tank shown in Figures 1 and 2 the top surface of the flexible liner has an
opening 13 which is directly above the orifice enabling theinternal flange 7 to be readily located. The opening 13 has connected around it afabric sleeve 14 which is closed by clamping bars. - Referring to Figures 4 and 5, in a modified version of the sleeve opening a
polystyrene cylinder 20 having an outside diameter to permit it to slide as a close fit into thesleeve 14 is used as a plug and secured by aclamping band 21 around the sleeve. Thecylinder 20 is arranged to project down below the lower end of the sleeve so that the lid or cover of the tank is slightly raised at this place to encourage air to move to this spot. Thepolystyrene cylinder 20 has a centralaxial bore 22 through it, which intersects severalradial bores 23 made at the level of the lid or cover of the tank, thus allowing trapped air to vent freely to atmosphere. A simplemushroom type cover 24 may be fixed on top of the plug to stop rain water or pollutants entering the vent. - The fabric sleeve could in an alternative version be replaced by a rigid inspection cover but whatever arrangement is used, it should permit ventilation of gas or air particularly when the tank is being filled.
- A storage tank in accordance with the invention may be constructed with
rigid ribs 6, for example, wooden battens, in place of the polythene tubes in the example described above. Such rigid members do not bend and peel away from the support wall when the tank is emptied but tilt inwardly. It has been found that in most applications the semi-rigid bendable ribs are preferable.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT82301079T ATE14004T1 (en) | 1981-03-03 | 1982-03-03 | STORAGE CONTAINER. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8106606 | 1981-03-03 | ||
GB8106606 | 1981-03-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0060084A1 EP0060084A1 (en) | 1982-09-15 |
EP0060084B1 true EP0060084B1 (en) | 1985-06-26 |
Family
ID=10520091
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP82301079A Expired EP0060084B1 (en) | 1981-03-03 | 1982-03-03 | Storage tank |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0060084B1 (en) |
AT (1) | ATE14004T1 (en) |
DE (1) | DE3264366D1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3310721A1 (en) * | 1982-05-05 | 1983-11-10 | Andreas Von Dipl.-Rer.Pol. Bennigsen-Mackiewicz | HANGABLE FLEXIBLE SILO ON CARRIER |
GB2162232B (en) * | 1984-07-27 | 1988-10-26 | James Edward Doyle | Large cylindrical vessels |
DE3439574A1 (en) * | 1984-10-29 | 1986-05-07 | Dietrich A.H. 2091 Wulfsen Kirchner | LARGE CONTAINER FOR SHEET-CAPABLE, PASTOESE AND SLUDGE-SHAPED MATERIALS AND METHODS OF USE FOR THE SAME |
NL8503003A (en) | 1985-02-21 | 1986-09-16 | Schelfhorst Hendrik W | RESERVOIR TO BE PLACED ON THE GROUND AND METHOD OF MANUFACTURING THE SAME |
GB2409702A (en) * | 2003-12-31 | 2005-07-06 | Nicholas John Trincas | Self erecting rainwater collection tank |
AT515754B1 (en) * | 2014-05-14 | 2016-06-15 | Ronald Staber | Filling aid for folding tank |
CN112173469A (en) * | 2020-11-05 | 2021-01-05 | 武汉工程大学 | Large storage tank with quincunx cross section |
CN114212392B (en) * | 2021-12-17 | 2023-02-03 | 徐州久山塑业有限公司 | Double-layer flexible freight bag |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US500773A (en) * | 1893-07-04 | Netti |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB161877A (en) * | 1920-06-30 | 1921-04-21 | Herbert Frederick Steuart Butt | Improvements in transportable containers for water and other liquids |
GB578855A (en) * | 1944-02-25 | 1946-07-15 | Leonard Shakesby | Improvements in or relating to flexible containers for liquids |
US2690778A (en) * | 1950-10-14 | 1954-10-05 | Dunlop Rubber Co | Container for storage of liquids |
DE906895C (en) * | 1952-03-11 | 1954-03-18 | Ziegler Schlauch Feuerloesch | Fluid tanks, especially storage and compensation tanks for fire water |
DE2535225C3 (en) * | 1975-08-07 | 1979-04-05 | Klaus 3593 Edertal Schunke | Equipment for the rearing, keeping and fattening of aquatic animals, in particular fish |
-
1982
- 1982-03-03 EP EP82301079A patent/EP0060084B1/en not_active Expired
- 1982-03-03 AT AT82301079T patent/ATE14004T1/en not_active IP Right Cessation
- 1982-03-03 DE DE8282301079T patent/DE3264366D1/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US500773A (en) * | 1893-07-04 | Netti |
Also Published As
Publication number | Publication date |
---|---|
ATE14004T1 (en) | 1985-07-15 |
EP0060084A1 (en) | 1982-09-15 |
DE3264366D1 (en) | 1985-08-01 |
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Legal Events
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