EP0245567A1 - Device for improving the buoyancy of a floating unit - Google Patents

Device for improving the buoyancy of a floating unit Download PDF

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Publication number
EP0245567A1
EP0245567A1 EP86401018A EP86401018A EP0245567A1 EP 0245567 A1 EP0245567 A1 EP 0245567A1 EP 86401018 A EP86401018 A EP 86401018A EP 86401018 A EP86401018 A EP 86401018A EP 0245567 A1 EP0245567 A1 EP 0245567A1
Authority
EP
European Patent Office
Prior art keywords
float
end element
buoyancy
fixed
floating assembly
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.)
Granted
Application number
EP86401018A
Other languages
German (de)
French (fr)
Other versions
EP0245567B1 (en
Inventor
Claude Bouvet
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.)
Direction General pour lArmement DGA
Etat Francais
Original Assignee
Direction General pour lArmement DGA
Etat Francais
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
Priority to FR8504906A priority Critical patent/FR2579556B1/en
Application filed by Direction General pour lArmement DGA, Etat Francais filed Critical Direction General pour lArmement DGA
Priority to EP19860401018 priority patent/EP0245567B1/en
Priority to DE8686401018T priority patent/DE3663359D1/en
Publication of EP0245567A1 publication Critical patent/EP0245567A1/en
Application granted granted Critical
Publication of EP0245567B1 publication Critical patent/EP0245567B1/en
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D15/00—Movable or portable bridges; Floating bridges
    • E01D15/14—Floating bridges, e.g. pontoon bridges
    • E01D15/20—Floating bridges, e.g. pontoon bridges collapsible, expandable, inflatable or the like with main load supporting structure consisting only of non-rigid members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/14—Arrangement of ship-based loading or unloading equipment for cargo or passengers of ramps, gangways or outboard ladders ; Pilot lifts
    • B63B27/143—Ramps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/08—Ice-breakers or other vessels or floating structures for operation in ice-infested waters; Ice-breakers, or other vessels or floating structures having equipment specially adapted therefor
    • B63B35/086—Vessels for displacing icebergs, or related methods

Definitions

  • the technical sector of the present invention is that of devices intended to improve the buoyancy of floating assemblies, more particularly applied to crossing machines for rapid or non-rapid implementation, to tanks, to barges, having end elements or access ramps used for loading and unloading heavy loads.
  • the present invention aims to eliminate the aforementioned drawbacks, by proposing a device for improving the buoyancy of the end elements making it possible to facilitate the loading and unloading of heavy loads such as armored vehicles or the like, by reducing as much as possible the sinking of the main floats and the loaded end element, regardless of the position of the shore relative to the body of water.
  • the invention also aims to involve in its entirety, the additional float under the end element, in the buoyancy of the floating assembly by permanently maintaining the entire lower surface of the float in contact with the plane of water, regardless of the position of the end element (positive or negative site).
  • the invention relates to a disposi tif to improve the buoyancy of a floating assembly by means of the end element articulated in the vertical longitudinal plane of the floating assembly, of the type comprising an auxiliary float, characterized in that it comprises means articulation of the float relative to the end element in the same vertical plane.
  • the articulation means can consist of an articulation axis located at the lower end of the element and at the upper end of the float and by at least one hydraulic cylinder articulated at its two ends on the element and on the float.
  • the hydraulic cylinder is fixed in rotation by one of its ends to the float, the other end of the cylinder being fixed in the same way to at least two rods, themselves also fixed in rotation, one with an end element and the other with a float.
  • a floating assembly 9 having an end element 4 to which is attached an auxiliary float l articulated at 3 with the lower part of this end element 4.
  • the float l is made movable relative to this element by at least one hydraulic cylinder 5.
  • the elements are articulated in the vertical longitudinal plane of the floating assembly.
  • the end element 4 is on the one hand, fixed in rotation at 8 with the floating assembly constituting a support and on the other hand posed and adjusted on a bank markedly raised relative to the body of water.
  • the hydraulic cylinder 5 being fixed in rotation by one of its ends to the float 1, the other end of the cylinder is advantageously fixed in the same way to at least two rods 6.
  • the rods are also fixed in rotation to their corresponding support , one in l0 to the element end and the other in ll to the float.
  • a servo system 7 linked to the angular position of the end element and intended to control the hydraulic cylinder 5 can be fixed by any means to the body of the cylinder, or elsewhere.
  • the invention allows the use of a flexible or rigid auxiliary float.
  • a rigid support 2 is fixed by any means to the upper part of the float l making it possible, in the case of a flexible auxiliary float, to ensure better rotational fixing, on the rigid support, of one end of the hydraulic cylinder 5 and a link 6.
  • the articulation means can be partially or totally housed or inscribed in the lower part of the end element 4.
  • the hydraulic cylinder 5 controlled by the servo system 7 allows, by means of articulation, to keep the entire lower surface of the auxiliary float l in contact with water while keeping the latter in a horizontal position. Therefore, the depression of the end element and, consequently, of the floating assembly is considerably limited by a significant Archimedes thrust exerted on the auxiliary float. This gives maximum buoyancy of the floating assembly.
  • the invention as described above remains applicable in the case of a negative inclination of the end element relative to the floating assembly, the upper part of which is then above the level of the shore, the float remains attached to the underside of the end element in this case (the negative position does not activate the servo system).

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

1. A device intended to improve the buoyancy of a floatable assembly (9), located under an end element hinged in the vertical longitudinal plane of the floatable assembly, of the type comprising an auxiliary float, characterized in that it includes means for hinging the float (1) with regard to the end element (4) in the same vertical plane.

Description

Le secteur technique de la présente invention est celui des dispositifs destinés à améliorer la flottabilité d'ensembles flottants, plus particulièrement appliqués aux en­gins de franchissement de mise en oeuvre rapide ou non, aux bacs, aux barges, disposant d'éléments d'extrémité ou rampes d'accès servant à l'embarquement ou au débarquement de charges lourdes.The technical sector of the present invention is that of devices intended to improve the buoyancy of floating assemblies, more particularly applied to crossing machines for rapid or non-rapid implementation, to tanks, to barges, having end elements or access ramps used for loading and unloading heavy loads.

Dans ce domaine, on connaît déjà des éléments d'extrémité ou rampes d'accès d'ensembles flottants comportant un ou plusieurs flotteurs additionnels ou auxiliaires solidai­res de la partie inférieure des éléments d'extrémité.In this area, there are already known end elements or access ramps for floating assemblies comprising one or more additional or auxiliary floats secured to the lower part of the end elements.

Cette disposition ne donne pas entière satisfaction car lorsque l'élément d'extrémité ajusté à une rive fortement surélevée par rapport au plan d'eau, seule une fai­ble partie du flotteur additionnel, solidaire de la partie in­férieure de l'élément d'extrémité, reste encore au contact de l'eau. De ce fait la flottabilité en charge de l'élément d'extrémité se trouve particulièrement diminuée : ceci entraî­ne une mauvaise participation de celui-ci à la flottabilité générale de l'ensemble flottant.This arrangement is not entirely satisfactory because when the end element adjusted to a bank which is highly raised relative to the water body, only a small part of the additional float, integral with the lower part of the end element, still remains in contact with water. Therefore the buoyancy under load of the end element is particularly reduced: this leads to poor participation of the latter in the general buoyancy of the floating assembly.

Un autre inconvénient d'un tel système est que l'embarquement et le débarquement de charges lourdes sont ren­dus particulièrement difficiles pour l'inclinaison positive très prononcée des éléments d'extrémité par rapport à l'ensemble flottant.Another drawback of such a system is that the loading and unloading of heavy loads is made particularly difficult for the very pronounced positive inclination of the end elements relative to the floating assembly.

La présente invention a pour but de supprimer les inconvénients précités, en proposant un dispositif pour amé­liorer la flottabilité des éléments d'extrémité permettant de faciliter l'embarquement et la débarquement de charges lourdes telles que des véhicules blindés ou autres, en réduisant au maximum l'enfoncement conjugué flotteurs principaux et de l'élément d'extrémité en charge, quelle que soit la position de la rive par rapport au plan d'eau.The present invention aims to eliminate the aforementioned drawbacks, by proposing a device for improving the buoyancy of the end elements making it possible to facilitate the loading and unloading of heavy loads such as armored vehicles or the like, by reducing as much as possible the sinking of the main floats and the loaded end element, regardless of the position of the shore relative to the body of water.

L'invention a également pour but de faire participer dans sa totalité, le flotteur additionnel sous l'élément d'extrémité, à la flottabilité de l'ensemble flottant en main­tenant en permanence toute la surface inférieure du flotteur en contact avec le plan d'eau, quelle que soit la position de l'élément d'extrémité (site positif ou négatif).The invention also aims to involve in its entirety, the additional float under the end element, in the buoyancy of the floating assembly by permanently maintaining the entire lower surface of the float in contact with the plane of water, regardless of the position of the end element (positive or negative site).

Pour ce faire, l'invention a pour objet un disposi­ tif pour améliorer la flottabilité d'un ensemble flottant par l'intermédiaire de l'élément d'extrémité articulé dans le plan longitudinal vertical de l'ensemble flottant, du type compre­nant un flotteur auxiliaire, caractérisé en ce qu'il comporte des moyens d'articulation du flotteur par rapport à élément d'extrémité dans le même plan vertical.To do this, the invention relates to a disposi tif to improve the buoyancy of a floating assembly by means of the end element articulated in the vertical longitudinal plane of the floating assembly, of the type comprising an auxiliary float, characterized in that it comprises means articulation of the float relative to the end element in the same vertical plane.

Les moyens d'articulations peuvent être constitués par un axe d'articulation situé à l'extrémité inférieure de l'élément et à l'extrémité supérieure du flotteur et par au moins un vérin hydraulique articulé à ses deux extrémités sur l'élément et sur le flotteur.The articulation means can consist of an articulation axis located at the lower end of the element and at the upper end of the float and by at least one hydraulic cylinder articulated at its two ends on the element and on the float.

Selon un mode de réalisation préféré, le vérin hy­draulique est fixé en rotation par l'une de ses extrémités au flotteur, l'autre extrémité du vérin étant fixée de la même manière à au moins deux biellettes, elles-mêmes fixées égale­ment en rotation, l'une à élément d'extrémité et l'autre au flotteur.According to a preferred embodiment, the hydraulic cylinder is fixed in rotation by one of its ends to the float, the other end of the cylinder being fixed in the same way to at least two rods, themselves also fixed in rotation, one with an end element and the other with a float.

L'invention sera explicitée en détail à l'aide du dessin annexé qui représente sans limitation de portée de l'invention un mode de réalisation de celle-ci.

  • La figure l représente schématiquement le dispositif pour améliorer la flottabilité, adapté à un élément d'extrémité adjusté à une rive fortement surélevée par rapport à un plan d'eau.
The invention will be explained in detail with the aid of the appended drawing which represents without limitation of the scope of the invention an embodiment thereof.
  • FIG. 1 schematically represents the device for improving buoyancy, adapted to an end element adjusted to a bank which is highly raised relative to a body of water.

En référence à la figure l, on voit un ensemble 9 flottant présentant un élément d'extrémité 4 auquel est fixé un flotteur auxiliaire l articulé en 3 avec la partie infé­rieure de cet élément d'extrémité 4. Le flotteur l est rendu mobile par rapport à cet élément par au moins un vérin hydrau­lique 5. Les éléments sont articulés dans le plan longitudinal vertical de l'ensemble flottant.Referring to Figure l, we see a floating assembly 9 having an end element 4 to which is attached an auxiliary float l articulated at 3 with the lower part of this end element 4. The float l is made movable relative to this element by at least one hydraulic cylinder 5. The elements are articulated in the vertical longitudinal plane of the floating assembly.

L'élément d'extrémité 4 est d'une part, fixé en ro­tation en 8 avec l'ensemble flottant constituant un support et d'autre part posé et ajusté sur une rive nettement surelevée par rapport au plan d'eau.The end element 4 is on the one hand, fixed in rotation at 8 with the floating assembly constituting a support and on the other hand posed and adjusted on a bank markedly raised relative to the body of water.

Le vérin hydraulique 5 étant fixé en rotation par l'une de ses extrémités au flotteur l, l'autre extrémité du vérin est avantageusement fixée de la même manière à au moins deux biellettes 6. Les biellettes sont fixées également en ro­tation à leur support correspondant, l'une en l0 à l'élément d'extrémité et l'autre en ll au flotteur.The hydraulic cylinder 5 being fixed in rotation by one of its ends to the float 1, the other end of the cylinder is advantageously fixed in the same way to at least two rods 6. The rods are also fixed in rotation to their corresponding support , one in l0 to the element end and the other in ll to the float.

Un système d'asservissement 7 lié à la position an­gulaire de l'élément d'extrémité et destiné à commander le vé­rin hydraulique 5 peut être fixé par tout moyen sur le corps du vérin, ou ailleurs.A servo system 7 linked to the angular position of the end element and intended to control the hydraulic cylinder 5 can be fixed by any means to the body of the cylinder, or elsewhere.

L'invention permet l'emploi d'un flotteur auxiliaire souple ou rigide.The invention allows the use of a flexible or rigid auxiliary float.

Dans un autre mode réalisation, un support rigide 2 est fixé par tout moyen à la partie supérieure du flotteur l permettant, dans le cas d'un flotteur auxiliaire souple, d'assurer une meilleur fixation en rotation, sur le support rigide, d'une extrémité du vérin hydraulique 5 et d'une biel­lette 6.In another embodiment, a rigid support 2 is fixed by any means to the upper part of the float l making it possible, in the case of a flexible auxiliary float, to ensure better rotational fixing, on the rigid support, of one end of the hydraulic cylinder 5 and a link 6.

Dans un autre mode de réalisation, les moyens d'articulation peuvent être partiellement ou totalement logés ou inscrits dans la partie inférieure de élement d'extrémité 4.In another embodiment, the articulation means can be partially or totally housed or inscribed in the lower part of the end element 4.

Lors de la mise en place de l'ensemble flottant sur le plan d'eau, l'élément d'extrémité 4, articulé en rotation en 8 avec son support, vient s'ajuster avec le bord de la ri­ve. Le système d'asservissement 7 commande alors le vérin hy­draulique 5 qui agit sur les biellettes 6, elles-mêmes faisant s'écarter le flotteur auxiliaire l de l'élément d'extrémité 4 et ceci jusqu'à ce que le flotteur ait atteint une position horizontale quel que soit le réglage en site.When the floating assembly is put in place on the water, the end element 4, articulated in rotation at 8 with its support, comes to adjust with the edge of the shore. The servo system 7 then controls the hydraulic cylinder 5 which acts on the rods 6, themselves causing the auxiliary float 1 to move away from the end element 4 and this until the float has reached a horizontal position regardless of the elevation setting.

Lors du passage de charges lourdes, du type véhi­cules blindés par exemple, sur l'élément d'extrémité, le vérin hydraulique 5 commandé par le système d'asservissement 7, per­met grâce à des moyens d'articulation de conserver toute la surface inférieure du flotteur auxiliaire l au contact de l'eau tout en maintenant ce dernier en position horizontale. De ce fait, l'enfoncement de l'élément d'extrémité et, par suite, de l'ensemble flottant se trouve considérablement li­mité par une poussée d'Archimède importante s'exerçant sur le flotteur auxiliaire. On obtient ainsi une flottabilité maxima­le de l'ensemble flottant.When passing heavy loads, such as armored vehicles for example, on the end element, the hydraulic cylinder 5 controlled by the servo system 7, allows, by means of articulation, to keep the entire lower surface of the auxiliary float l in contact with water while keeping the latter in a horizontal position. Therefore, the depression of the end element and, consequently, of the floating assembly is considerably limited by a significant Archimedes thrust exerted on the auxiliary float. This gives maximum buoyancy of the floating assembly.

On notera que l'invention telle qu'elle est décrite ci-dessus reste applicable dans le cas d'une inclinaison néga­tive de l'élément d'extrémité par rapport à l'ensemble flot­tant, dont la partie supérieure de ce dernier est alors au-dessus du niveau de la rive, le flotteur reste dans ce cas accolé à la face inférieure de l'élément d'extrémité (la posi­tion négative n'active pas le système d'asservissement).Note that the invention as described above remains applicable in the case of a negative inclination of the end element relative to the floating assembly, the upper part of which is then above the level of the shore, the float remains attached to the underside of the end element in this case (the negative position does not activate the servo system).

Claims (6)

l - Dispositif pour améliorer la flottabilité d'un ensemble flottant placé sous un élément d'extrémité articulé dans le plan longitudinal vertical d'un ensemble flottant, du type comportant un flotteur auxiliaire, caractérisé en ce qu'il comporte des moyens d'articulation du flotteur (l) par rapport à l'élément d'extrémité (4) dans le même plan verti­cal.l - Device for improving the buoyancy of a floating assembly placed under an articulated end element in the vertical longitudinal plane of a floating assembly, of the type comprising an auxiliary float, characterized in that it comprises articulation means of the float (l) relative to the end element (4) in the same vertical plane. 2 - Dispositif selon la revendication l, caractérisé en ce qu'il comprend un axe d'articulation situé à l'extrémité inférieure et à l'extrémité supérieure du flotteur et au moins un vérin articulé à ses deux extrémités sur l'élément d'extrémité et sur le flotteur.2 - Device according to claim l, characterized in that it comprises a hinge pin located at the lower end and at the upper end of the float and at least one jack articulated at its two ends on the element of end and on the float. 3 - Dispositif selon la revendication l, caractérisé en ce que le vérin hydraulique (5) est fixé en rotation par l'une de ses extrémités au flotteur, l'autre extrémité du vé­rin étant fixée de la même manière à au moins deux biellettes (6), elles-mêmes fixées également en rotation, l'une à l'élément d'extrémité et l'autre au flotteur.3 - Device according to claim l, characterized in that the hydraulic cylinder (5) is fixed in rotation by one of its ends to the float, the other end of the cylinder being similarly fixed to at least two rods ( 6), themselves also fixed in rotation, one to the end element and the other to the float. 4 - Dispositif selon l'une quelconque des revendica­tions l à 3, caractérisé en ce que le vérin hydraulique (5) est commandé par un système d'asservissement (7) lié à la po­sition angulaire de l'élément d'extrémité, permettant au flot­teur de rester en permanence en position horizontale.4 - Device according to any one of claims l to 3, characterized in that the hydraulic cylinder (5) is controlled by a servo system (7) linked to the angular position of the end element, allowing the float to remain permanently in a horizontal position. 5 - Dispositif selon l'une quelconque des revendica­tions l à 4, caractérisé en ce que les moyens d'articulation sont partiellement logés ou inscrits dans la partie inférieure de l'élément d'extrémité.5 - Device according to any one of claims l to 4, characterized in that the articulation means are partially housed or inscribed in the lower part of the end element. 6 - Dispositif selon l'une quelconque des revendica­tions l à 4, caractérisé en ce que les moyens d'articulation sont totalement logés ou inscrits dans la partie inférieure de l'élément d'extrémité.6 - Device according to any one of claims l to 4, characterized in that the articulation means are completely housed or inscribed in the lower part of the end element.
EP19860401018 1985-04-01 1986-05-13 Device for improving the buoyancy of a floating unit Expired EP0245567B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR8504906A FR2579556B1 (en) 1985-04-01 1985-04-01 DEVICE FOR IMPROVING THE BUOYANCY OF A FLOATING ASSEMBLY
EP19860401018 EP0245567B1 (en) 1986-05-13 1986-05-13 Device for improving the buoyancy of a floating unit
DE8686401018T DE3663359D1 (en) 1986-05-13 1986-05-13 Device for improving the buoyancy of a floating unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19860401018 EP0245567B1 (en) 1986-05-13 1986-05-13 Device for improving the buoyancy of a floating unit

Publications (2)

Publication Number Publication Date
EP0245567A1 true EP0245567A1 (en) 1987-11-19
EP0245567B1 EP0245567B1 (en) 1989-05-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860401018 Expired EP0245567B1 (en) 1985-04-01 1986-05-13 Device for improving the buoyancy of a floating unit

Country Status (3)

Country Link
EP (1) EP0245567B1 (en)
DE (1) DE3663359D1 (en)
FR (1) FR2579556B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9402228A (en) * 1994-12-28 1996-08-01 Ingenieursburo Van Kessel & Ja Loading bridge (wharf) for a vessel
KR100802194B1 (en) 2007-09-11 2008-02-18 (주)씨케이마린 Wharf

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2579556B1 (en) * 1985-04-01 1987-05-15 France Etat Armement DEVICE FOR IMPROVING THE BUOYANCY OF A FLOATING ASSEMBLY
FR2601643B1 (en) * 1986-07-18 1988-11-10 Macgregor Navire Sa SUPPLEMENTARY SERVICE SYSTEM, SUCH AS FOR EXAMPLE A POOL, CONNECTED TO A VESSEL

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE621627A (en) * 1961-08-23
FR913999A (en) * 1947-01-27 1946-09-25 Use of amphibious seaplanes for the construction of non-permanent bridges intended primarily for military use
GB1499741A (en) * 1975-03-17 1978-02-01 Macgregor & Co Ltd Floatable ramps
FR2579556A1 (en) * 1985-04-01 1986-10-03 France Etat Armement Device for improving the flotation of a floating assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR913999A (en) * 1947-01-27 1946-09-25 Use of amphibious seaplanes for the construction of non-permanent bridges intended primarily for military use
BE621627A (en) * 1961-08-23
GB1499741A (en) * 1975-03-17 1978-02-01 Macgregor & Co Ltd Floatable ramps
FR2579556A1 (en) * 1985-04-01 1986-10-03 France Etat Armement Device for improving the flotation of a floating assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9402228A (en) * 1994-12-28 1996-08-01 Ingenieursburo Van Kessel & Ja Loading bridge (wharf) for a vessel
KR100802194B1 (en) 2007-09-11 2008-02-18 (주)씨케이마린 Wharf

Also Published As

Publication number Publication date
DE3663359D1 (en) 1989-06-22
FR2579556B1 (en) 1987-05-15
FR2579556A1 (en) 1986-10-03
EP0245567B1 (en) 1989-05-17

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