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WO2004044520A1 - Dispositif destine a absorber des ondes de choc - Google Patents

Dispositif destine a absorber des ondes de choc Download PDF

Info

Publication number
WO2004044520A1
WO2004044520A1 PCT/GB2003/004888 GB0304888W WO2004044520A1 WO 2004044520 A1 WO2004044520 A1 WO 2004044520A1 GB 0304888 W GB0304888 W GB 0304888W WO 2004044520 A1 WO2004044520 A1 WO 2004044520A1
Authority
WO
WIPO (PCT)
Prior art keywords
blast
container
absorbing device
gel
absorbing
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
PCT/GB2003/004888
Other languages
English (en)
Inventor
Peter James
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.)
Cintec International Ltd
Original Assignee
Cintec International 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 Cintec International Ltd filed Critical Cintec International Ltd
Priority to AU2003283555A priority Critical patent/AU2003283555A1/en
Publication of WO2004044520A1 publication Critical patent/WO2004044520A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
    • F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
    • F42D1/24—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor characterised by the tamping material
    • F42D1/28—Tamping with gelling agents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
    • F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
    • F42D1/20—Tamping cartridges, i.e. cartridges containing tamping material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D5/00—Safety arrangements
    • F42D5/04—Rendering explosive charges harmless, e.g. destroying ammunition; Rendering detonation of explosive charges harmless
    • F42D5/045—Detonation-wave absorbing or damping means

Definitions

  • This invention relates to a blast-absorbing device, which can be also used to monitor scatter patterns for an explosion and to a blast protection structure, which is formed of a plurality of said blast absorbing devices.
  • Known structures for absorbing blast from explosions are usually formed of reinforced hardened material, which provide a rigid wall to contain or withstand the blast resulting from the explosion.
  • the liquid filled bag is perforated, it cannot be used again safely.
  • a more significant disadvantage is that where the liquid-filled blast protection bags are deployed permanently or semi-permanently around e.g. public buildings or other potential target areas it will be apparent that perforation can be caused by e.g.
  • a blast- absorbing device comprising a container having an inlet aperture through which pourable material can be introduced into the container, said aperture being closable in order to maintain the material within the container, wherein the material within the container is a settable gel which provides a blast absorbing medium for the blast- absorbing device.
  • settable gel is intended to mean any material which is initially in a pourable condition, whereafter it thickens to a consistency which is not pourable but is not hard, or not easily pourable in normal use, such that upon the container being breached by e.g. a bullet or a knife all or substantially all of the material remains within.
  • blast absorbing is meant blast from e.g. an explosion, but also includes energy from e.g. a vehicle ramming into the blast absorbing device, whether or not such is followed by an explosion.
  • the gel is a starch-based composition and is initially pourable into the container as a liquid which thereafter sets.
  • the starch-based composition may also be provided as a main component that is mixed with other materials, for example other gels, to provide a consistency that is most appropriate for withstanding blast or a particular type of blast.
  • a mixture of gelatine and starch based materials may be used, possibly introduced as layers within a blast absorbing device or alternatively the different materials may be contained within separate compartments of the blast absorbing device.
  • the material to form the gel is made from pre- mixed starch and water sold under the name RediBOND 4323A which, when mixed with caustic soda (sodium hydroxide), initially results in a slightly viscose liquid being formed which can easily be poured into the inlet aperture of the or each bag, whereafter it sets into a gel which, depending upon the quantities used, can even be a self supporting gel similar to jelly such that in the event of a bag being ripped, cut or shot at it, it is still substantially self supporting.
  • RediBOND 4323A which, when mixed with caustic soda (sodium hydroxide), initially results in a slightly viscose liquid being formed which can easily be poured into the inlet aperture of the or each bag, whereafter it sets into a gel which, depending upon the quantities used, can even be a self supporting gel similar to jelly such that in the event of a bag being ripped, cut or shot at it, it is still substantially self supporting.
  • the gel may have inclusions interspersed therein, such as gel or polymer beads. These beads may be of a different consistency or viscosity from the surrounding gel, so providing areas within the containers, which can react differently to blast.
  • areas of reinforcement may be provided within the gel. Reinforced areas can be provided in the core of the container so as to provide a final area of blast protection should the surrounding gel be subjected to particularly high levels or sustained explosions.
  • Ash may be included within the gel material. However, other particulates may be included to provide a suitable viscosity for the gel.
  • the ash or particulates preferably may be at a level of less than 1.0% but if the properties of the gel are to be tailored for a particular application, other levels may be used.
  • the inclusion of particulates such as ash contribute to absorbing blast and help to dampen shock waves that are produced by an explosion.
  • the gel may include pockets of air. This has the effect of making the blast-absorbing device lighter so it can be transported more easily but it also provides a combined means of blast absorption by using different types of media, for example the air and the gel.
  • the air may be introduced into the container and bubbles blown into the initial mixture, or depending upon its consistency and setting time, during setting.
  • the blast-absorbing device comprises an inflatable container formed of a flexible bag divided into internal chambers in which one chamber is above another.
  • one or more of the chambers may include a reinforcement layer, which could be a lightweight armour material such as Kevlar ®.
  • the container may have one or more surfaces coated with a non-slip coating which be integral with the material making up the container, or it may be a layer that is applied to the surface of the container post-production.
  • This non- slip coating will allow for blast-absorbing devices to be placed one against the other with a reduced risk of them slipping relative to one another.
  • inflatable bags are used for the container, they are formed of a drop-stitch material, which have the effect of keeping the parallel skins of the drop-stitch material parallel to one another when the container is inflated and helps to prevent bulging of the container walls in localised areas, thereby providing a degree of uniformity and strengthening for the blast- absorbing device.
  • the blast-absorbing device may have an irregular surface contour which can be provided by elements such as tongues, grooves and rebates. By having contoured surfaces, when a container is filled with gel, one blast-absorbing device may be placed adjacent another in a relatively secure manner.
  • blast-absorbing devices may have tie rods or tie members, which allow adjacent devices to be secured to one another.
  • a blast protection structure comprising a plurality of blast-absorbing devices, each comprising a container having an inlet aperture through which material can be introduced into the container, said aperture being closable in order to retain the material within the container, wherein the material within the container is a settable gel which provides a blast absorbing medium for the blast-absorbing device.
  • Such blast-absorbing devices include devices as previously described.
  • the blast protection structure may be provided as a wall between an object and a blast or it may be provided as a housing around a structure which could explode. When formed as a housing, the blast protection structure can contain blast from the explosion within a localised area i.e. within the confines of the housing provided by the blast protection structure.
  • the blast protection structure comprises a combination of the blast-absorbing devices of the first aspect of the invention, together with containers that include a liquid.
  • the liquid filled containers may be spheres or plastic containers that ideally are contained within or supported by a lightweight frame. It is envisaged that the liquid is water.
  • the frame supporting the liquid filled containers may be placed in front of a wall of the gel filled blast-absorbing devices.
  • a wall comprises a combination of blast-absorbing devices and liquid filled containers.
  • the blast-absorbing devices and the liquid filled containers are supported by a frame.
  • This may be a frame that is common to both types of containers or a separate frame may be provided for the gel filled containers and the liquid filled containers.
  • the frame may be formed of a lightweight material, such as aluminium, so that it can be transported and moved into position relatively easily.
  • the frame may be provided as a structure, which can be assembled into a predetermined structure, for example a wall section.
  • the frame may be assembled into structures as required by adding on additional frame sections to provide a structure having the desired dimensions to support the blast-absorbing devices needed to contain or protect against blast.
  • the blast protection structure comprises a multi-layer wall having an outermost wall formed of gel filled blast-absorbing devices and an inner wall, being positioned behind the outermost wall which is formed of liquid filled containers.
  • Such an arrangement allows the blast protection structure to have both blast-absorbing properties, this being provided by the gel containers and also, possible fire extinguishing properties that are provided by the facilities by the liquid-filled containers. In effect it is a dual action wall where if the blast is so severe that the gel containers are damaged, then the effect of the blast is also dampened by the liquid-filled containers.
  • a scatter pattern monitoring device adapted to monitor a scatter pattern produced by materials released by an explosion
  • said scatter pattern monitoring device comprising one or more blast-absorbing devices each comprising a container ' having an inlet aperture through which material can be introduced into the container, said aperture being closable in order to maintain the material within the container, wherein the material within the container is a gel which provides a blast-absorbing medium for the scatter pattern monitoring device such that materials released by an explosion are contained within the gel on impacting with the or each container.
  • the scatter pattern monitoring device is for monitoring the scatter patterns produced by ordinance being fired directly at the device. This may be to test weapons or missiles and how they react on impacting a surface.
  • the missiles may be fired from guns or hand held missile launchers.
  • the device may be constructed so that larger scale explosions can be monitored, for example, where missiles are launched from a tank or an aircraft.
  • the scatter pattern monitoring device in this case would be constructed so that it has a large enough surface area to absorb blast directed at it.
  • a frame may be provided to support the blast-absorbing device. It may be that the blast-absorbing devices can also have integral hooks or ties so that they may be secured to each other or to the frame to provide a substantially secure structure for the target area for the explosion.
  • deflected blast from an explosion may be monitored.
  • the device may be used to monitor blast patterns when an explosion occurs at various positions relative to the scatter pattern monitoring device.
  • Such an arrangement may enable researchers to observe how blast is deflected, for example down a street when an explosion occurs.
  • blast-absorbing devices or structures as described may be positioned so that they deflect blast away from areas where members of the public are likely to be.
  • a blast- absorbing device comprising a container having an inlet aperture through which material can be introduced in the container, said aperture being closable in order to maintain the material within the container, wherein the material in the container is a gel which provides a blast-absorbing medium for the blast- absorbing device, said gel being reactable with a gel degrading material so that the gel is thereby converted to a liquid which may then be removed from the blast-absorbing device.
  • a gelatine or starch based material known enzymes capable of the degrading gelatine or starch are used.
  • chemicals can be used which degrade the gel material physically, for example by bond degradation. Ideally, the chemicals used are those that do not degrade the container holding the gel.
  • the feature of a having a degradable gel material can be provided for the blast-absorbing device, the blast protection structure and the scatter pattern-monitoring device as previously described.
  • the gel used is preferably maintained in the gel form.
  • inclusions such as diluted glycols, salt solutions or alcohol based solutions may be used to increase the freezing point of the gel to avoid it freezing.
  • Figure 1 shows a cross sectional view of a blast-absorbing device according to the invention
  • Figure 2 shows a cross section of a blast-absorbing device showing a device having upper and lower chambers
  • Figure 3 shows a blast protection structure comprising blast-absorbing devices
  • Figure 4 shows a cross section of a blast protection structure including a frame for supporting filled containers
  • Figure 5 shows a frame that can be used with blast-absorbing devices of the invention to form a blast protection structure
  • FIG. 6 shows a scatter pattern monitoring device according to an aspect of the invention.
  • a blast-absorbing device is generally shown as 1.
  • the device 1 comprises an container 3, which is in a generally rectangular format, although other shaped containers may be used.
  • the container 3 includes a set gel 2 made from a mixture of water and starch, such as that sold as RediBOND 4463A, and caustic soda (sodium hydroxide).
  • caustic soda sodium hydroxide
  • a cap 4 which covers an inlet aperture in the container and through which gel may be introduced.
  • the cap 4 is located in an upper wall of the container for ease of filling but such may be positioned elsewhere, depending on what requirements are needed for access to fill the container 3.
  • Multiple inlet apertures may be located at various points on the container so access points to fill the container may be selected.
  • the base of the container 3 includes a reinforcement layer 5, which provides added support for the container.
  • the reinforcement layer 5, may be formed of a blast resistant armour, such as from Kevlar®.
  • This reinforcement layer 5 also allows a filled container 3 to be dragged along the ground without impairing the ability of the container 3 to hold, at least initially, a pourable mixture including water before it has been caused to set to a gel through the use of the gelling agents as described above or other gelling agents, which may include locally occurring natural products such as rice, tapioca and sago which effectively act as thickening agents sufficient to prevent or inhibit the container 3 from losing most or all of its contents within a short period due to e.g. a knife attack.
  • the container 3 may be dissected by a dividing wall 6, which splits the container into upper and lower compartments.
  • the compartments may be filled with materials having different properties, for example the lower compartment may include a gel of one consistency while the upper compartment includes a gel of a different consistency.
  • the two compartments may be separated by a valve 7, which will control flow of material between the compartments.
  • the valve may be operated as a passive device or it may be activated by an external operator controlling the valve to allow filling of the compartments as required.
  • two compartments are shown, there may be several compartments forming the container 3.
  • a blast protection structure may be formed of gel- filled blast-absorbing devices.
  • the blast-absorbing devices may comprise differing size devices with smaller size devices 3a forming the walls of a housing while larger blast-absorbing devices 3b stack one above the other to form a roof of a housing for a blast protection structure.
  • Such can provide a shelter for individuals or objects so that they may be shielded from e.g. explosions.
  • Access to the blast protection structure can be through an opening in a wall and there may be additional apertures in the wall of the housing to allow hands or weapons to pass through.
  • the blast protection structure may form a blast containment structure which is built around an explosive object that is then be detonated. Debris from the blast is contained within the confines of the blast protection structure, so protecting individuals in proximity to the explosive device.
  • the blast protection structure may comprise adjacent wallsla, 1b of blast-absorbing devices 1 and containers 3.
  • the containers 3a, 3b are supported by a frame comprising an upright wall 8, which is positioned between walls 1a, 1b, the wall 8 having arms 9 resembling shelves along its length and which extend substantially at right angles to the upright.
  • the arms 9 support the individual containers 3a, 3b of the walls 1a and 1b.
  • the frame may be supported on or driven into the ground so that a firm wall is provided for the blast protection structure.
  • FIG 5 shows a schematic view of a frame for supporting a blast protection structure as shown in Figure 3.
  • the frame comprises uprights 8a, which may be driven into the ground.
  • the uprights have support arms 9a at various positions and these support arms may be connected to the uprights 8a via joints 10.
  • the uprights 8a may also have jointed sections allowing for the frame to be assembled and disassembled quickly and easily and also enable the structure to be folded into a compact structure for easy transport and storage.
  • the gel filled bags may themselves be deflated by adding a material to the gel which allows it to degrade so that the gel may be removed from the bag by being poured.
  • the device for the present invention may also provide for scatter pattern-monitoring.
  • a scatter pattern-monitoring device is shown generally at 1c in Figure 6 and is formed of a container 3, including a gel material. On impact with the container 3, particles of debris from an explosion will provide impact points 11 on the container 3 and at least some of the debris wilt be absorbed within the gel thereby stopping it passing through the other side of the container. This provides a readily identifiable pattern for the blast structure. The scatter pattern can then be analysed by ballistics experts to study e.g. the firing action of weapons.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)

Abstract

Un premier aspect de l'invention concerne un dispositif (1) destiné à absorber des ondes de choc. Ce dispositif comprend un contenant (3) qui comporte une ouverture d'introduction par laquelle une matière liquide peut être introduite dans le contenant, cette ouverture pouvant être obturée (4) de façon à ce que la matière ne sorte pas du contenant. La matière introduite dans le contenant est un gel durcissable (2) qui constitue un moyen d'absorption des ondes de choc pour le dispositif selon l'invention.
PCT/GB2003/004888 2002-11-12 2003-11-12 Dispositif destine a absorber des ondes de choc Ceased WO2004044520A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003283555A AU2003283555A1 (en) 2002-11-12 2003-11-12 A blast-absorbing device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0226312A GB0226312D0 (en) 2002-11-12 2002-11-12 A blast-absorbing device
GB0226312.7 2002-11-12

Publications (1)

Publication Number Publication Date
WO2004044520A1 true WO2004044520A1 (fr) 2004-05-27

Family

ID=9947635

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2003/004888 Ceased WO2004044520A1 (fr) 2002-11-12 2003-11-12 Dispositif destine a absorber des ondes de choc

Country Status (3)

Country Link
AU (1) AU2003283555A1 (fr)
GB (1) GB0226312D0 (fr)
WO (1) WO2004044520A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005052500A1 (fr) * 2003-11-24 2005-06-09 Oztech Pty Ltd As Trustee Of The Oztech Trust Attenuation d'impulsion de pression
WO2006125969A1 (fr) * 2005-05-23 2006-11-30 Oztech Pty Ltd Attenuation des impulsions de pression
WO2006114597A3 (fr) * 2005-04-28 2006-12-14 Oztech Pty Ltd Procede permettant d'attenuer les effets d'une impulsion de pression
WO2009007732A1 (fr) * 2007-07-12 2009-01-15 Lindstrand Technologies Limited Défense gonflable pour navires de taille importante
AU2011203138B2 (en) * 2005-04-28 2012-12-20 Flexiblast Pty Limited Pressure impulse mitigation
DE102013105416B3 (de) * 2013-05-27 2014-09-25 Millenium Packaging GmbH Mobile in ihrer Form flexible Schutzeinrichtung für die Kampfmittelräumung von Sprengkörpern sowie Verfahren zur kontrollierten Sprengung eines Sprengkörpers
KR101931620B1 (ko) * 2018-07-05 2018-12-21 전남대학교산학협력단 폴리머 겔 튜브를 이용한 발파 방법
GB2627780A (en) * 2023-03-01 2024-09-04 Brown David Barrier structure for blast protection

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3049079A (en) * 1957-11-18 1962-08-14 Hercules Powder Co Ltd Waterproof container and closure therefor
US3063373A (en) * 1959-06-08 1962-11-13 Hercules Powder Co Ltd Method of blasting
GB2099117A (en) * 1981-05-07 1982-12-01 Unilever Plc Stemming shot holes
US5394786A (en) * 1990-06-19 1995-03-07 Suppression Systems Engineering Corp. Acoustic/shock wave attenuating assembly
GB2292997A (en) * 1994-08-15 1996-03-13 John Humphries Parkes Improvements in and relating to explosion suppression
US6439120B1 (en) * 1997-12-12 2002-08-27 Her Majesty The Queen In Right Of Canada As Represented By The Solicitor General Acting Through The Commissioner Of Royal Canadian Mounted Police Apparatus and method for blast suppression
WO2002072981A1 (fr) * 2001-03-10 2002-09-19 Peter James Structures de protection contre le souffle
DE20220429U1 (de) * 2002-04-10 2003-07-17 TDW Gesellschaft für verteidigungstechnische Wirksysteme mbH, 86529 Schrobenhausen Mobiler Splitterschutz

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3049079A (en) * 1957-11-18 1962-08-14 Hercules Powder Co Ltd Waterproof container and closure therefor
US3063373A (en) * 1959-06-08 1962-11-13 Hercules Powder Co Ltd Method of blasting
GB2099117A (en) * 1981-05-07 1982-12-01 Unilever Plc Stemming shot holes
US5394786A (en) * 1990-06-19 1995-03-07 Suppression Systems Engineering Corp. Acoustic/shock wave attenuating assembly
GB2292997A (en) * 1994-08-15 1996-03-13 John Humphries Parkes Improvements in and relating to explosion suppression
US6439120B1 (en) * 1997-12-12 2002-08-27 Her Majesty The Queen In Right Of Canada As Represented By The Solicitor General Acting Through The Commissioner Of Royal Canadian Mounted Police Apparatus and method for blast suppression
WO2002072981A1 (fr) * 2001-03-10 2002-09-19 Peter James Structures de protection contre le souffle
DE20220429U1 (de) * 2002-04-10 2003-07-17 TDW Gesellschaft für verteidigungstechnische Wirksysteme mbH, 86529 Schrobenhausen Mobiler Splitterschutz

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005052500A1 (fr) * 2003-11-24 2005-06-09 Oztech Pty Ltd As Trustee Of The Oztech Trust Attenuation d'impulsion de pression
US7832324B2 (en) 2003-11-24 2010-11-16 Flexiblast Pty Ltd. Fire mitigation
US7861637B2 (en) 2003-11-24 2011-01-04 Flexiblast Pty Ltd Pressure impulse mitigation
US8828134B2 (en) 2005-04-28 2014-09-09 Flexiblast Pty Ltd. Pressure impulse mitigation
WO2006114597A3 (fr) * 2005-04-28 2006-12-14 Oztech Pty Ltd Procede permettant d'attenuer les effets d'une impulsion de pression
EP2169344A3 (fr) * 2005-04-28 2010-11-24 Flexiblast Pty Ltd Réduction de l'impulsion de pression
AU2006239009B2 (en) * 2005-04-28 2011-07-21 Flexiblast Pty Limited Pressure impulse mitigation
AU2011203138B2 (en) * 2005-04-28 2012-12-20 Flexiblast Pty Limited Pressure impulse mitigation
WO2006125969A1 (fr) * 2005-05-23 2006-11-30 Oztech Pty Ltd Attenuation des impulsions de pression
US9175931B2 (en) 2005-05-23 2015-11-03 Flexiblast Pty Ltd. Pressure impulse mitigation
AU2006250982B2 (en) * 2005-05-23 2011-08-18 Flexiblast Pty Limited Pressure impulse mitigation
GB2464017A (en) * 2007-07-12 2010-04-07 Lindstrand Technologies Ltd Air inflatable fender for large vessels
WO2009007732A1 (fr) * 2007-07-12 2009-01-15 Lindstrand Technologies Limited Défense gonflable pour navires de taille importante
DE102013105416B3 (de) * 2013-05-27 2014-09-25 Millenium Packaging GmbH Mobile in ihrer Form flexible Schutzeinrichtung für die Kampfmittelräumung von Sprengkörpern sowie Verfahren zur kontrollierten Sprengung eines Sprengkörpers
KR101931620B1 (ko) * 2018-07-05 2018-12-21 전남대학교산학협력단 폴리머 겔 튜브를 이용한 발파 방법
GB2627780A (en) * 2023-03-01 2024-09-04 Brown David Barrier structure for blast protection
GB2627780B (en) * 2023-03-01 2025-06-18 Brown David Barrier structure for blast protection

Also Published As

Publication number Publication date
AU2003283555A1 (en) 2004-06-03
GB0226312D0 (en) 2002-12-18

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