EP1257482B1 - Structure de paroi amortisseuse de choc a haute energie et conteneur utilisant une telle structure - Google Patents
Structure de paroi amortisseuse de choc a haute energie et conteneur utilisant une telle structure Download PDFInfo
- Publication number
- EP1257482B1 EP1257482B1 EP01907782A EP01907782A EP1257482B1 EP 1257482 B1 EP1257482 B1 EP 1257482B1 EP 01907782 A EP01907782 A EP 01907782A EP 01907782 A EP01907782 A EP 01907782A EP 1257482 B1 EP1257482 B1 EP 1257482B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- container
- absorbing wall
- shock
- high energy
- impact
- 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 - Lifetime
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Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F5/00—Transportable or portable shielded containers
- G21F5/06—Details of, or accessories to, the containers
- G21F5/08—Shock-absorbers, e.g. impact buffers for containers
-
- 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
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/02—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
- B65D81/05—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents
- B65D81/107—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents using blocks of shock-absorbing material
Definitions
- the field of the invention is that of transport of objects by container, that is to say in all cases where it is necessary to take precautions to guard against damage to objects transported.
- the invention relates in particular the containers constituting a protective envelope specific resistant to different aggression that may suffer transport packages during their trip, for example falls.
- the main purpose of the present invention is to propose, for this last category of containers of the "high energy” type, walls or intermediate damping structures between solutions using wood and those using metals.
- a damping system adjustable according to the dimension of the container, that of the contained object and the shocks to endure.
- WO-93 00845 discloses a damping structure. It is constituted mainly one or more layers consisting of at least one flat plate on which is plated or positioned a second bent plate, to form polygonal pads, as in cells used for storing eggs. he is mentioned that the inside of these hollow studs can be filled with gas or elastic material, these the latter can resume their form once they have been deformed.
- a first main object of the invention is a damping wall structure of high-energy shock, consisting mainly of carrier structure in which are distributed regular metal studs, the density of studs in the supporting structure depending on the crush resistance to obtain. This resistance to crushing is also defined according to conditions of transport and objects transported.
- the carrier structure is alveolar, the studs being placed in some cells.
- this alveolar carrier structure is a honeycomb structure.
- One of the materials chosen to achieve this Alveolar bearing structure is aluminum.
- a second main object of the invention is a transport container that has to withstand significant falls and including at least one wall constituted, at least in part, of a wall defined in the previous paragraphs for cushion high energy shocks.
- a particular achievement of this container is intended to carry the objects elongated, such as the fuel rods of nuclear center.
- the container is the shape of a cylindrical body, closed to these two ends, whose walls of these are covered by a structure, as defined in the paragraphs above.
- a holding cover can cover and maintain each damping structure.
- Figure 1 shows in section, a container of the high energy type, according to the invention. He understands mainly a rigid structure 3 consisting of several relatively thick walls and forming a crate or box closed. Inside this one there are locking elements 2 to immobilize the object to be transported 1 positioned in the center of the container, optimally.
- the wall structure according to the invention is constituted mainly of a carrier structure 4 alveolar, for example of the hexagonal type, of the honeycomb type.
- This supporting structure 4 is made of metal, for example aluminum, and therefore does not have a mass, given the large number of spaces voids, constituted by the cells 6. It has for function to keep in place studs 5, distributed uniform way throughout the supporting structure 4.
- studs 5 are arranged in a row so that these studs 5 are uniformly distributed, for example, for that each stud 5 is separated from another by three empty cells 6. The filling rate thus obtained is around 15%. It depends on the surface of pads relative to the total area.
- the impact of the container on the ground or on any obstacle depends on the mass M of the container and the object to be protected, the impact velocity V, the working surface S of the container crushing and the acceptable thickness of the crash E of the damper.
- the damping surface can be characterized by a plastic compression bearing ideal for crushing ⁇ pal .
- the structure of the container and the object to be protected must be able to support an acceleration ⁇ max without crippling deformation.
- ⁇ max ⁇ pal xS M
- ⁇ S damping pads Working container which corresponds to the density of the studs.
- ⁇ S damping pads Working container which corresponds to the density of the studs.
- ⁇ S damping pads
- the plastic compression stage ⁇ pal ⁇ e ⁇ ⁇ , where ⁇ e is the elastic limit stress of the material constituting the damping pads, hence 0.01 ⁇ e ⁇ pal ⁇ 0,90 ⁇ e . (The compression bearing of the structure is neglected).
- an advantageous embodiment of the damping structure according to the invention consists of several layers. More precisely, several layers 7 N , 7 N + 1 , ... carrying structures, symbolized by plates drawn in phantom, are superimposed. They each contain a number of pads 5, regularly distributed in the manner explained above. It should be noted that it is not necessary to superimpose the pads 5 N of a layer 7 N above the pads 5 N + 1 of the layer 7 N + 1 or layers directly adjacent thereto. On the contrary, it is essential to shift the pads 5 N + 1 in each layer 7 N + 1 relative to the positioning of the pads 5 N of the adjacent layer 7 N.
- the pads 5 N of the layer 7 N are offset by a distance equal to half the distance separating them, with respect to the pads 5 N + 1 of the directly adjacent layer 7 N + 1 .
- the studs 5 N tend to deform the layer 7 N + 1 located just behind, at a place where there is no stud 5 N + 1 worn by the latter.
- the studs 5 N + 1 will tend to deform the layer 7 N in front, since no 5 N stud will be directly opposite.
- the characteristics of the damping structure thus formed result from the stacking of a number of layers 7 N , 7 N + 1 , 7 N + 2 , ..., and the distribution of the pads 5 N , 5 N + 1 , 5 N + 2 , ..., found in each of them.
- the protection of it may be only when the direction of impact is known to advance.
- This container mainly comprises a case 11, in which is placed the object 10, preferably doubled by a body outside 12. The whole is closed at its ends. These are each covered with a thickness determined of the damping structure defined previously and referenced 13. The latter may possibly be covered with a lid of 14.
- the modular nature of the load-bearing structures used in the structure according to the invention makes it easy to change the level of occupation of the studs or the nature of these studs. It is thus possible to play on the compression characteristic ⁇ e of the material constituting the studs and on their thickness to reach the desired plastic compression stage ⁇ pal .
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Mechanical Engineering (AREA)
- Vibration Dampers (AREA)
- Buffer Packaging (AREA)
Description
- Les conteneurs, du type « basse énergie », prévus pour résister à des chutes d'une hauteur inférieure au mètre. Si V est la vitesse du colis au moment de l'impact (V < 5 m/s). Dans cette catégorie de conteneurs, les masses sont généralement inférieures à la tonne. En conséquence, l'énergie d'impact est inférieure au kilojoule. Dans cette catégorie, se trouvent les conteneurs dimensionnés pour supporter les chutes inéluctables liées à la manutention, quelle qu'elle soit, des objets. L'impact est généralement absorbé par un dispositif amortisseur en matériau compressible, de type élastomère, placé à l'intérieur ou à l'extérieur du conteneur. L'écrasement de ce matériau protège l'objet à transporter.
- Les conteneurs, de type « moyenne énergie », doivent endurer des chutes dont la hauteur est supérieure au mètre (V > 5 m/s). Dans ce type de conteneur, la masse du colis, constitué par le conteneur et son contenu, peut atteindre plusieurs tonnes et l'énergie d'impact est comprise entre le kilojoule et le mégajoule.
- Les conteneurs, de type « haute énergie », doivent supporter des chutes dont la hauteur est supérieure à la dizaine de mètres (V > 10 m/s). Les masses des colis peuvent alors atteindre plusieurs dizaines de tonnes et l'énergie d'impact est supérieure au mégajoule. Dans cette catégorie se trouvent les conteneurs dimensionnés pour supporter des chutes accidentelles lors de transports de type aérien. La structure d'un tel conteneur doit pouvoir se déformer, mais raisonnablement, à l'impact de la chute, de manière à ne pas endommager l'objet contenu. Un tel conteneur nécessite l'utilisation d'un amortisseur pour limiter le plus possible l'effet du choc vis-à-vis de l'objet transporté. L'absence de matériau de raideur intermédiaire entre le bois et le métal conduit généralement à choisir, par défaut, le bois comme matériau amortisseur. Le bois ayant un palier de compression relativement faible, le dimensionnement de ce type de conteneur conduit à avoir des épaisseurs importantes de bois pouvant dépasser le mètre, de manière à ce que l'écrasement de celui-ci ne soit pas totalement terminé à la fin de l'impact. En effet, dans ce cas, il n'y aurait plus d'amortisseur à la fin de l'impact.
- figure 1, en coupe, le principe d'un conteneur de transport à protection globale ;
- figure 2, un schéma de la répartition des plots, dans la structure alvéolaire selon l'invention ;
- figure 3, un plot utilisé dans la structure alvéolaire selon l'invention ;
- figure 4, en vue cavalière, une réalisation de la structure selon l'invention à plusieurs couches ;
- figure 5, en coupe, l'application de la structure selon l'invention à un conteneur destiné à transporter un objet allongé ; et
- figure 6, en vue cavalière, le conteneur représenté à la figure 5.
σe est la contrainte limite élastique du matériau constituant les plots amortisseurs, d'où
Claims (8)
- Structure de paroi amortisseuse de choc à haute énergie, constituée principalement d'une structure porteuse (4) dans laquelle sont répartis régulièrement des plots métalliques (5, 5N, 5N1), la densité des plots dans la structure porteuse (4) dépendant de la résistance à l'écrasement qu'on désire obtenir.
- Structure de paroi amortisseuse de choc selon la revendication 1, caractérisée en ce que la structure porteuse (4) est alvéolaire, les plots (5, 5N, 5N1) étant placés dans certains alvéoles (6) de la structure porteuse (4).
- Structure de paroi amortisseuse de choc selon la revendication 2, caractérisée en ce que la structure porteuse (4) alvéolaire est une structure en nid d'abeilles.
- Structure de paroi amortisseuse de choc selon la revendication 3, caractérisée en ce que la structure porteuse (4) alvéolaire est en aluminium.
- Structure de paroi amortisseuse de choc selon la revendication 1, caractérisée en ce que la structure porteuse (4) est une structure à plusieurs couches (7, 7N, 7N+1,...) superposées et alvéolées, les plots (5, 5N, 5N1) étant décalés les uns des autres d'une couche à l'autre.
- Conteneur de transport devant résister à des chutes importantes, comportant au moins une paroi constituée au moins en partie d'une structure de paroi selon l'une des revendications 1 à 5 pour amortir des chocs à haute énergie.
- Conteneur de transport selon la revendication 6, destiné à transporter un objet allongé (10), constitué d'un corps cylindrique (11) fermé à ses deux extrémités, caractérisé en ce que les structures de parois amortisseuses de chocs à haute énergie sont des parois (13) recouvrant chacune une extrémité du corps cylindrique (11).
- Conteneur de transport selon la revendication 7, caractérisé en ce qu'il comprend un couvercle (14) recouvrant les parois de structure amortisseuse (13).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0001833 | 2000-02-15 | ||
FR0001833A FR2804941B1 (fr) | 2000-02-15 | 2000-02-15 | Structure de paroi amortisseuse de choc a hauteur energie et conteneur utilisant une telle structure |
PCT/FR2001/000418 WO2001060713A1 (fr) | 2000-02-15 | 2001-02-14 | Structure de paroi amortisseuse de choc a haute energie et conteneur utilisant une telle structure |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1257482A1 EP1257482A1 (fr) | 2002-11-20 |
EP1257482B1 true EP1257482B1 (fr) | 2004-05-06 |
Family
ID=8846995
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01907782A Expired - Lifetime EP1257482B1 (fr) | 2000-02-15 | 2001-02-14 | Structure de paroi amortisseuse de choc a haute energie et conteneur utilisant une telle structure |
Country Status (4)
Country | Link |
---|---|
US (1) | US6953125B2 (fr) |
EP (1) | EP1257482B1 (fr) |
FR (1) | FR2804941B1 (fr) |
WO (1) | WO2001060713A1 (fr) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2835958B1 (fr) * | 2002-02-11 | 2004-11-26 | Transnucleaire | Paroi de protection a blindage anti-poincon pour conteneur et conteneur comprenant au moins une telle paroi |
EP1571677B2 (fr) † | 2004-03-06 | 2012-11-07 | GNS Gesellschaft für Nuklear-Service mbH | Conteneur pour transport et/ou stockage avec au moins un élément radioactif |
US7624887B2 (en) * | 2006-09-01 | 2009-12-01 | D.J. Avery Group, Inc. | Reusable transport packaging |
JP2011247701A (ja) * | 2010-05-25 | 2011-12-08 | Mitsubishi Heavy Ind Ltd | 放射性物質格納容器 |
FR3006098B1 (fr) * | 2013-05-22 | 2015-06-26 | Tn Int | Emballage d'entreposage de combustible irradie comprenant des rails amortis de guidage d'etui |
US9721688B2 (en) * | 2014-02-12 | 2017-08-01 | Bwxt Mpower, Inc. | Lift-based up-ender and methods using same to manipulate a shipping container containing unirradiated nuclear fuel |
DE102014118344B3 (de) * | 2014-12-10 | 2016-02-18 | Areva Gmbh | Schockabsorber für Transport- und/oder Lagerbehälter für Brennelemente und/oder brennstoffenthaltende Gebinde und Brennelement und/oder brennstoffenthaltendes Gebinde sowie Transport- und/oder Lagerbehälter für Brennelemente und/oder brennstoffenthaltende Gebinde |
FR3042902B1 (fr) * | 2015-10-22 | 2017-12-22 | Cockerill Maintenance & Ingenierie Sa | Dispositif de stockage de materiaux dangereux |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US386696A (en) * | 1888-07-24 | Howaed p | ||
US3054524A (en) * | 1958-01-28 | 1962-09-18 | James W Casten | Jacketed vessel and method of producing same |
US3072022A (en) * | 1961-10-30 | 1963-01-08 | Davis M Wood | Missile container suspension system |
DE3028424C2 (de) * | 1980-07-26 | 1984-05-30 | Transnuklear Gmbh, 6450 Hanau | Stoßdämpfer |
IL62441A (en) * | 1981-03-20 | 1984-04-30 | Urdan Ind Ltd | Ammunition storage system and container for use therein |
WO1993000845A1 (fr) * | 1991-07-01 | 1993-01-21 | Raven Marketing, Inc. | Structure d'amortissement |
-
2000
- 2000-02-15 FR FR0001833A patent/FR2804941B1/fr not_active Expired - Fee Related
-
2001
- 2001-02-14 WO PCT/FR2001/000418 patent/WO2001060713A1/fr active IP Right Grant
- 2001-02-14 EP EP01907782A patent/EP1257482B1/fr not_active Expired - Lifetime
- 2001-02-14 US US10/182,405 patent/US6953125B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
WO2001060713A1 (fr) | 2001-08-23 |
FR2804941A1 (fr) | 2001-08-17 |
US6953125B2 (en) | 2005-10-11 |
FR2804941B1 (fr) | 2002-05-03 |
EP1257482A1 (fr) | 2002-11-20 |
US20030015541A1 (en) | 2003-01-23 |
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