AU601630B2 - Bag for transporting dry granular powders - Google Patents

Bag for transporting dry granular powders Download PDF

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Publication number
AU601630B2
AU601630B2 AU24155/88A AU2415588A AU601630B2 AU 601630 B2 AU601630 B2 AU 601630B2 AU 24155/88 A AU24155/88 A AU 24155/88A AU 2415588 A AU2415588 A AU 2415588A AU 601630 B2 AU601630 B2 AU 601630B2
Authority
AU
Australia
Prior art keywords
bag
channels
dry granular
base portion
filling
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.)
Ceased
Application number
AU24155/88A
Other versions
AU2415588A (en
Inventor
Pawell Baltyn
William J. Tanner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Amatek Ltd
Original Assignee
Amatek Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Amatek Ltd filed Critical Amatek Ltd
Priority to AU24155/88A priority Critical patent/AU601630B2/en
Publication of AU2415588A publication Critical patent/AU2415588A/en
Application granted granted Critical
Publication of AU601630B2 publication Critical patent/AU601630B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D90/00Component parts, details or accessories for large containers
    • B65D90/02Wall construction
    • B65D90/04Linings
    • B65D90/046Flexible liners, e.g. loosely positioned in the container
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D88/00Large containers
    • B65D88/54Large containers characterised by means facilitating filling or emptying
    • B65D88/72Fluidising devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/04Conveying materials in bulk pneumatically through pipes or tubes; Air slides
    • B65G53/16Gas pressure systems operating with fluidisation of the materials
    • B65G53/18Gas pressure systems operating with fluidisation of the materials through a porous wall
    • B65G53/22Gas pressure systems operating with fluidisation of the materials through a porous wall the systems comprising a reservoir, e.g. a bunker
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D2590/00Component parts, details or accessories for large containers
    • B65D2590/02Wall construction
    • B65D2590/04Linings
    • B65D2590/043Flexible liners
    • B65D2590/046Bladders

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)

Description

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U'I~AT
PATENT,', ACT 1952 Form COMPLETE SPECIFICATION
(ORIGINAL)
FOR OFFICE USE 601630 Short Title: Int. CI Application Number: Pi 5217 lodged 3rd November 1987 Lodged, PI 8866 lodged 20th June 1988 C.omplete Specification-Lodgjed: Accepted:* Lapsed;, Published: Priority:, Relted Art This document contoia'rth1, I in~d:~ ITLIC Ut, ATO BE COMPLETED M -Ei~ LIMITED BY APPLICANT
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Ncme of Applicant: Ad~dress of Applicant-.
Actual Inventor: Address for Service: -MAPi Q- Wil)liam J. TANNPR at',d Pawell BALTYN HALEORD AND MAXWELL, Patent Trador Mark Attorneys, 49-51 York street, SyDNEY, N.S.,W.f 2000
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6 -7 C(Jmplete Speciticat0on for the invent~on entitled: "BAG FOP. TRANSPORTING ttRY GRANULAPR !OWDERS" The following, statement I& a full description of this invention,, Including the best, method of performing it, known to Ujs:- -2- The present invention relates to a bag for the transport of dry granular powders in a convenient and efficient manner, The invention also relates to a collapsible bag that can be folded to a more compact form once the transport of powder has been completed.
One example of a dry granular powder to which the invention has application is fly ash.
Fly ash is used as a neutral ingredient in many building materials. In the prior art, it has been transported in rigid containers wh.ch require much manipulation at either end of the journey. It is generally gravity discharged from the container into a storage hopper. Vacuum pumping techniques have also been used to empty a container. The chief disadvantage of prior art devices is the wasted volume of the container once emptied and its weight for cartage and manipulation. Fluidised techniques have been used previously, for example, to discharge fine particulate matter from Phips; however, these installations are bulky and as fixed installations not transportable in the sense required, of the present invention.
hi In accordance with the present invention there Jis disclosed a bag for the transport of dry granular powdered materials including a generally flexible and collapsible skin for holding a volume of dry granular powdered material, the skin having top, side and base portions, a fluidising means in said base portion for providing aeration of the powdered material, input means connecting to said fluidising means in said base portion for providirg pressurised gas to aerate the powdered material, output means onnecting to said base portion for withdrawing the powdered material fron said bag, means for filling the. bag, and means for supporting the bag uring filling and during transport thereof wher state said skin incluc being foldable to a cc in a filled or partially filled ling said base portion when. empty m-pact form.
4$ j A preferred embodiment of the invention will now be described with respect to the drawings in which: Fig. 1 showp a schematic draw ng of the bag according to the invention in a condition $;uitable for transport; Fig. 2 shows a cross-sectional schematic through the base portion of the bag shown in Fig. 1; Fig. 3 shows another embodiment of the base portion of the bag according to the invention; Fig. 4 is a cross-sectional view through line A-A of Fig. 3; and Fig. 5 and 6 show schematically two methods of emptying the bag.
The bag and its function will now be described with respect to the transport of fly ash.
Figure 1 shows the bag 2 attached by suitable tie means such as loop6 3 to the frame of a standard transport container 1. The container 1 is shown as a steel frame and wire open structure for ease of illustration, only. Other types of contain~r to hold the bag 2 are contemplated, A container of 2m x 2.4m x 6m holds approximately 20 tonnes of fly ash in bag The bag 2 is made of a suitably strong and flexible z :1i ic
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-4material such as reinforced synthetic fibre or rubberised -slth. The exterior of the bag 2 is provided with tie means 3 to allow the bag 2 to be secure3 to ,he container 1. The tie means 3 may be spaced approximately every 0.6 metres around the perimeter of the bag and be made of asuitably elasticised material to allow resilient support of the weighted bag. The bag 2 has a filling or venting orifice 5 at a suitably central location in the top of the bag 2. The bag 2 can also be provided with a securing means 4 to hold a filtration cloth when the bag is being aerated during emptying.
The bag 2 has a base portion 10 the elements of which are best described with reference to Figs. 2 or 3.
In Fig. 2, this base portion 10 is provided with inlet ports 14 and 16 and outlet port 18, which are preferably provided at one end of the bag 2.
The inlet ports 14 and 16 take pressurised gas from an external source and distribute it along channels formed in the base portion 10. The channels 15 are formed 20 in the base portion 10 by welding or sewing (as shown as integer 7 in Figs. 3 and 4) a sheet of material, e.g.
rubberised cloth, along -hannel edges 12 to the outer skin or wall of bag 2. The surface towards the inside of bag 2 of these channels is provided with holes 13 distributed along their length. The number and size of these holes 13 are chosen to match the area provided by the inlet ports 14 and 16. To provide a uniform distribution of the pressurised gas into the volume of the bag 2 to fluidise the fly ash contents an aeration cloth 17 (as shown in
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C i -1 j. -L i. il~. .i 1 i 1 5 1 15 Fig. 4) is sewn to the base to cover the channels An outlet port 18 is provided preferably at the same end as inlet ports 14 and 16. This outlet port 18 is connected to a negative pressure pumping device to evacuate the contents of the bag 2. The inle-t ports 14 and 16 and outlet port 18 are provided at one-end of the bag 2 so that a simple attachment of the appropriate air hoses thereto can be achieved. The outlet port 18 is a length of flexible hose which receives a nozzle of an evacuating pump and the two are clamped together to provide a secure mating fit with the edge of the nozzle flush with the wall 11 of the bag 2. The flexibility in the hose allows the nozzle to be moved about by an operator to ensure substantially full evacuation of the fly ash contained in the bag 2.
An alternative construction for the base portion 10 is shown with reference to Fig. 3. In this em-bodinment the base portion 10 is provided with inlet ports 14 and 16 towards the sides 19 and 19' of the bag.
Channels 15 are formed in a serpentine pattern between ports 14 and 16 connected by manifolds 21. and 22 at -the front and rear of the bag. Aeration outlets or holes 13 are provided as before. Three outlet ports 18, 24 and 25 (shown schematically in Figure 3) are provided in place of the one port 18 to improve the evacuation of the bag. TQhis is shown schematicall~y in Figures 5 and 6. These outlet ports 18, 24 and 25 are located with two ports 24 and 25 adjacent the inlet ports 14 and 16 respectively as shown in Fig. 3, and one port 18 located centrally much as shown in Figs, 1 and 2. This construction improves the removal of the particular material especially along the sides 19 and 19' of the base 10 of the bag.
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-6- The base 10 may be fixed to t'lie wall of the bag by a zipper 23 as shown in Figure 4. The zipper 23 allows the base 10 f a damaged bag to be recovered and re-used.
The use of the bag 2 will now be described. The ,bag 2 is secured by tie means 3 to thG frame or structure of a suitable container 1. The bag 2 could previously have been in a folded and collapsed state. The inlet ports 14, 16 and outlet ports 18, 24 and 25 are, or have been, closed off by suitable ties or other means to prevent loss of fly ash through those ports, The bag 2 is filled with fly ash through filling or venting orifice 5, the flexibility in the bag material allowing the bag to assumae its full size equivalent to the voluno defined by the container 1. As entrappeed air makes the p'uwdt r fluid the fly ash is allowed to settle, Depending on the container this settling step may be unnecessary. When a simple frame container 1 as in Figure 1 i~s used 20-3Q minutes settling time is allowed for the powder to resume a more solid consistency. The filling or venting orifice 5 is then closed off by suitable means. The container 1 is now transported to a destination, by road or rail.
At the destination the Qontents of the bag 2 held by container 1 are, unloaded in a manner with reference to either Fig, 5 or Fig, 6. The container 3. ia inclined at an angle of greater than preferably 100, with respect to the horizontal. This inclination of the container is to overcome the friction of the& -ontents of the fly ash once fl~uidised. That is, this angle is thosen to at least equate with the angle of repose of the -7fluidised fly ash.
As shown with reference to Fig. 5 the inlet ports 14 and 16 and outlet ports 18, 24 and 25 are connected to appropriate pressurised source hoses 29 and vacuum pump hoses 30 respectively. The pressurised source hoses 29 are connected to a blower 31 providing the pressurised source. The vacuum pump hose 30 is connected to receiving hopper 32. The hopper 32 is connected via primary filter 33, non-return valve 34, and secondary filter 35 to vacuum pump 36. The filling or venting orifice 5 is opened and connected to the main silo or the receiving hopper 32 in 0 go Oo 0 Fig. 5 (or hopp-- 37 in Fig. 6) via vent line Alternatively, orifice 5 can be covered with a filtration 00 0 cloth as shown by means 4 in Figure 1 to contain the fly ash but allow pressurised gas to escape. The fly ash is now aerated from the pressurised source 31 and this is continued preferably for a period to allow complete fluidization of the particulate contents. The hoses connecting to outlet ports 18, 24 and 25 are provided with valves 26, 27 and 28 respectively. The outlet valve 26 or valves 26, 27 and 28 as the case may be is/are kept closed during this period which has been found for the size of container mentioned above at a working pressure of 20 kPa to be approximately 10-20 minutes.
With the orifice 5 left open pumping can now be initiated from outlet port 18 by opening valve 26. A negative pressure difference of 50 kPa has been found satisfactory to empty the 20 tonnes of the abovementioned container in 35 minutes. Either of the outermost pair of I -8-
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P ;i "1 i r t ji 'i valves 27 and 28 controlling outlets 24 and 25 need only be opened towards the completion of the evacuation to aid collection of material along the sides 19 and 19'. To maintain pressure only one valve is opened at any given time. Further the nozzle connected to the outlet port 18 can be moved about. These steps combine to allow substantially the full volume of fly ash contents to be removed from the bag.
Although the contents of the bag are described as being pumped out under negative pressure, the fluidisation of the contents of the bag and the inclination of the container will suffice to allow the bag to empty. The powder under the aeration from line 29 from the pressurised source 31 acts as a fluid. This alternate procedure avoids the need of an evacuation pump 36 and is shown schematically in Figure 6. The bag simply empties from outlets 18, 24 and 25 into receiving hopper 37 under gravity discharge once fluidisation has been achieved and out'et valve 26 or valves 26, 27 and 28 have been opened as required.
The hoses can now be removed from their associated ports and these ports closed off. The tie means 3 can then be released from the container 1 and the bag 2 folded to a more compact shape. The container 1 can now be reused for carrying other goods while bag 2 occupying much less space can be sent back to the source for refilling.
While the foregoing describes embodiments of the invention the invention is not to be construed as limited thereto. Other variations in the invention are also contemplated. For example, the inlet and outlet ports need not be located at the same end of the bag 2. The outlet port 18 or ports 18, 24 and 25 could be at the opposite end of bag 2 to the inlet ports 14 and 16. The bag when being emptied is then inclined so that the fluidised material flows towards the outlet port or ports, Instead of a single filling/venting orifice 5 two separate holes can be provided for respectively filling t' bag and venting the bag during emptying.
The bag can also be used for the transport of other o t 0 types of powdered materials other than fly ash.
00" a I 3 *ra~

Claims (9)

1. A bag for the transpcrt of dry granular powdered materials including, a generally flexible and collapsible skin for holding a volume of dry granular powdered material, said (kin having top, side and base portions, e fluidizin9 means in said base portion for providing aeration of the powdered material, inlet means connecting to said fluidizi-ng means in said base portion for providing pressurized gas to aerate the powdered material, outlet means connecting to said base portion fQor 4 twithdrawing the powdered material from said1 bag, means for filling the bag, and means for supporting the bag during filling and during transport thereof when in a filled or a partially filled state, said skin including said base portion when empty being foldable to a compact form.
2. A bag as claimed in Claim 1 wherein said fluidizing means includes a plurality of channels formed in said base means, each of said channels having a plurality of holes for admitting air to the interior of said bag.
3. A bag as claimed in Claim 2 wherein each of said channels is open at one end and closed at the other end, said open end of each of said channels connecting to a manifold which in turn is connected to said inlet means.
4. A bag as claimed in claim 2 wherein said channels are open at either end, said inlet means including a i/ W le; first and a second inlet port, said channels being connected in parallel between said first and second -11- ports. A bag as claimed in Claim 3 wherein said fluidizing means further include an aeration cloth I covering said channels. G. A bag as claimed in claim 5 wherein said outlet means comprise a single outlet port.
7. A baq as claimed in Claim 6 wherein said base portion is detochably conneclted to the side portions of said skin.
8. A bag as claimed in Claii,. 7 w'herein said means for filling include an orifice in the top of said bag and a ventingg hole associated therewith.
9. A bag as claimed in Claim 4 wherein said fluidizing means further include an aeration cloth covering said channels. A bag as claimed in claim 9 wherein said o~tti means includu three outlet ports in said base p-tion. J1i. A bag as claimed in Claim 9 wherein said base t portion is detachably connected to the side portions of said skin.
12. A bag as claimed in Claim 11 wherein said means for filling include an orifice in the top portion of said bag and a venting hole associated therewith. 13, A method for transporting dry granular powdered materials including the steps of: securing a bag as claimed in Claim 1 to a fj supporting frame or container, 1-12- filling the bag so supported with dry granular powdered material, transporting the bag to a destination, unloading the contents of the bag at the destination including the steps of: applying pressurised gas to said inlet means for a time sufficient to fluidise the contents of the bag, through said fluidising means, selectively operating said outlet means to discharge said fluidised contents of said bag, untying said bag from said supporting frame or container once empty, and folding said bag to a compact form for return for refilling.
14. A method as claimed in Claim 13 further including the step of, inclining said bag at said dest~n .ion, to an angle equal to or greater than the angle of respose of the fiuidised dry granular powdered material. A method as claimed in Claim 14 wherein said angle of repose is Detween 60 and 100. i Dated this 18th day of May 1990 Amatek Limited Patent Attorneys for the Applicant HALFORD CO. TA Z.
AU24155/88A 1987-11-03 1988-10-21 Bag for transporting dry granular powders Ceased AU601630B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU24155/88A AU601630B2 (en) 1987-11-03 1988-10-21 Bag for transporting dry granular powders

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
AUPI886687 1987-11-03
AUPI5217 1987-11-03
AUPI8866 1988-06-20
AUPI521788 1988-06-20
AU24155/88A AU601630B2 (en) 1987-11-03 1988-10-21 Bag for transporting dry granular powders

Publications (2)

Publication Number Publication Date
AU2415588A AU2415588A (en) 1989-05-04
AU601630B2 true AU601630B2 (en) 1990-09-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
AU24155/88A Ceased AU601630B2 (en) 1987-11-03 1988-10-21 Bag for transporting dry granular powders

Country Status (1)

Country Link
AU (1) AU601630B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011085558A1 (en) * 2010-01-15 2011-07-21 Llopez Pablo Container bag for filling bulk goods

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU623305B1 (en) * 1991-09-05 1992-05-07 Mulawa Trading Co Pty Ltd Container liner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011085558A1 (en) * 2010-01-15 2011-07-21 Llopez Pablo Container bag for filling bulk goods

Also Published As

Publication number Publication date
AU2415588A (en) 1989-05-04

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