Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D88/00—Large containers
  • B65D88/34—Large containers having floating covers, e.g. floating roofs or blankets
  • B65D88/36—Large containers having floating covers, e.g. floating roofs or blankets with relatively movable sections
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D90/00—Component parts, details or accessories for large containers
  • B65D90/22—Safety features
  • B65D90/38—Means for reducing the vapour space or for reducing the formation of vapour within containers
  • B65D90/42—Means for reducing the vapour space or for reducing the formation of vapour within containers by use of particular materials for covering surface of liquids

Definitions

• the present invention relates to the field of the coating of liquid surfaces, and more particularly to the isolation of the liquid with respect to the atmosphere in order to limit the phenomena of evaporation or the emanations of the liquid but also to limit the emission of vapors harmful or toxic, the formation of foam and splashing when the surface of the liquid is moving.
• the covering is made by means of a floating screen consisting of a new type of self-positionable floats.
• the floating screen according to the invention consists of floats which, once placed on the surface of the liquid, will cover substantially all of this surface.
• Said new floats form a screen that can be repositioned to form a screen following movements of the liquid consecutive to a vigorous stirring phase (filling or withdrawal of the container) or moderate (variation of level with or without modification of the geometry of the surface of the liquid).
• Containers in which a screen consisting of self-positionable floats can be used are typically liquid storage tanks. Indeed, certain liquids such as hydrocarbons or food liquids require isolation vis-à-vis the atmosphere when stored in containers to preserve their qualities, avoid contamination of the atmosphere by them or still avoid losses of material by evaporation. Within the containers, the volume of liquid will vary according to the filling and withdrawal maneuvers of the container. In order to cover the surface of the stored liquid, while avoiding manipulation and contaminations, and while maintaining a maximum of liquid volume without loss, it is therefore necessary to use a device that can form a screen according to the variations in level and movements of the liquid, whether large or moderate, within the storage container.
• the patent application FR2250884 describes such floats for use with similar floats to cover the surface of a liquid.
• These floats consist of a floating body comprising a hexagonal shaped skirt whose height is at least 5 mm. The shape of the float is chosen so that the skirt is at the level of the surface of the liquid whatever the position of the float. The float waterline thus coincides with the location of the skirt. When the surface of the liquid is flat, the floats are positioned relative to each other through the sides of the hexagonal skirts, thus forming a screen.
• This device is designed to withstand the wind when storing liquids, especially water, in tanks located outside.
• the floats are superimposed or agglutinate depending on the movements of the water during the tank filling for example.
• the floats will move and be superimposed, the screen then being completely unstructured, with no real possibility that the floats are positioned correctly again to form a new screen.
• These floats do not seem to be self-positioning.
• the patent application JP 08193731 describes spherical shaped floats equipped with skirts and intended to form a protective screen for liquids.
• the floats consist of two hemispheres that are joined at the level of the skirt. The skirt rests on the surface of the liquid, so the flotation plane of the float coincides with the skirt.
• the upper hemisphere is hollow and the lower hemisphere contains a ballast weight and an opening for the liquid to enter. The float is thus held in place on the surface of the liquid as it moves.
• the upper hemisphere is out of the liquid and the lower hemisphere is immersed and weighted, a flip-flop is unlikely.
• this float is dissymmetrical with respect to the plane of the skirt so in the event of a flotation of the float following a movement of the liquid, the recovery function is no longer ensured.
• the floats are weighted, it is very likely that they are wedged next to each other, without their skirts are superimposed, thus leaving gaps between them and exposing the stored liquid to the atmosphere. Therefore these floats can not be considered as auto positionable.
• the patent application JP2000319952 describes floats capable of forming a liquid cover. These floats are designed to prevent the evaporation of water in storage tanks. These floats consist of two hemispheres and a skirt that rests on the liquid. The lower hemisphere is provided with an orifice thus made permeable to the liquid and the float contains a floating ball that can move up and down inside the float. Once in a flotation situation, the float contains liquid and will move according to the movements of said liquid because it is ballasted by water. It is unlikely that these floats will turn, however they will stall next to each other rather than superimposed to form a screen, leaving gaps between them. These floats can not be considered as self-positioning.
• the utility model DE3927616 describes floats capable of forming an anti-evaporation screen for liquids stored in tanks.
• the floats consist of a hollow body or a floating solid body whose median plane comprises a skirt.
• the materials are either plastic, metallic or mixed.
• the skirt does not necessarily rest on the surface of the liquid and consists of two thicknesses, one of which has a fold which is wound around the outer edge of the other thickness. The extra thickness thus formed at the outer edge of the skirt of each float will degrade the operation of the float screen system because the floats will collide during the return to calm after a phase of vigorous agitation (filling or withdrawal of the container ) or moderate (level variation with geometric defect).
• each float consists of a body of given shape (lens, sphere, flattened sphere, polyhedron, etc.) and a border that rests on the surface of the liquid to contribute to the buoyancy and stability of the body. each float. The waterline and the center of gravity of the float merge with the border. These floats consist of two half-floats equipped with a border.
• the border thickness is calculated to promote the overlap of the borders to avoid appearing interstices.
• center of gravity and waterline are in the same plane, the phenomenon of lodging is not possible and the edges collide in case of movement of the liquid.
• the floats will then stall against each other, or superimposed, which will cause the exposure of the liquid in some places. These floats are not perfectly self-positioning.
• the present invention provides a floating screen consisting of self-positionable floats capable of forming a screen on the surface of a liquid to isolate this liquid from the atmosphere as well in the stationary phase, as after a intense or moderate agitation phase.
• the present invention provides a floating screen consisting of self-positionable floats whose percentage of overall coverage of the surface of a liquid is greater than the devices described in the prior art. Indeed, thanks to new self-positionable floats, the floating screen according to the invention does not expose the liquid even in case of return to the stationary phase after sudden movements of the liquid surface to be covered.
• Each float will find a functional place within the screen, without overlapping the floats or setting the floats relative to each other.
• the protective screen will be reformed after shaking thanks to the self-positioning character of the floats according to the invention.
• the present invention provides an improvement to the floats described in FR0957052 and the cover screen they are likely to form.
• the invention proposes a floating screen consisting of self-positionable floats in which the floats consist of a floating body and a skirt, said skirt extending substantially parallel to the surface of the liquid and being situated above the waterline of the float.
• the principle of these self-positionable floats is to allow the phenomenon of lodging but in a controlled manner, that is to say that in the stationary state each float is stable, and also that the floats can fulfill their function whatever the direction in which they float, that is to say that after agitation of the surface of the liquid each float must return to a perfectly functional state.
• each float is placed in the plane of the skirt, on the axis of symmetry connecting the two ends of the float and raised relative to the surface of the liquid at rest.
• the screen formed by adjacent floats allows the skirts of each float to be superimposed above the surface of the liquid on which floats the screen. This minimizes the possibility of exposure of the stored liquid because the rings do not rest on the surface of said liquid. Moreover this also minimizes the possibility for the bodies of the floats to be superimposed. Thus the screen formed by the new floats according to the invention no longer reveals interstices that expose the liquid to the atmosphere of the container or the outside atmosphere.
• the moderate accommodation of each float allows the screen to adapt to the light movements of the liquid surface and in case of strong agitation during the filling or racking phases, the floats will move and the screen will be disorganized but as soon as the liquid returns to a quieter state, the self-positioning floats will come to form a new screen perfectly covering the surface of the liquid.
• the present invention describes a self-positionable float within a screen floating on a liquid to be isolated from the atmosphere, float which consists of a hollow or solid sealed body, and a substantially planar skirt located around said body, and
• the skirt extends substantially parallel to the liquid surface and is located above the float line on the liquid.
• the skirt and the center of gravity of the float both located in the same plane, must be located in a range between 3 and 12 mm above the float line of waterline.
• the skirt and the center of gravity of the float are raised at least 5 mm from the float line on the liquid.
• the skirt of the float according to the invention is at least 5 mm from the floating line of the float on the liquid in the stationary state.
• the skirt is located 5 mm above the float line of waterline.
• the center of gravity of the float is also located 5 mm above the floating line of the float on the axis connecting the two poles of the floating body.
• Fig. 1 describes a sectional view of a float (1) according to the present invention in an embodiment of flattened spherical shape and in the stationary state.
• Fig. 2 depicts a sectional view of several floats (1) of spherical shape flattened as in FIG. 1 cooperating with each other in the stationary state.
• Fig. 3 depicts a view from above of a screen portion (5) consisting of floats (1) of spherical shape cooperating with each other in the stationary state.
• Fig. 4 is a top view of a spherical float according to the invention.
• Fig. 5 describes a particular embodiment in which a male half-float is intended to be welded to the female half-float of FIG. 6 to form a float (1) according to the invention.
• the half-float carries the skirt (3) and a fuse tooth.
• Fig. 6 describes the same embodiment as FIG. 5 in which a female half-float is intended to be welded to the male half-float to form the body of a float
• the half-float has a groove for receiving the fuse tooth of the male half-float.
• the present invention describes a self-positionable float (1) within a floating screen (5) on a liquid (4) to be isolated from the atmosphere, said float (1) consisting of a hollow body (2) or full, and a substantially planar skirt (3) located around said body
• the skirt (3) extends substantially parallel to the surface of the liquid (4) and is located above the float line (1).
• any material that can float on a liquid can be used to make self-positionable floats (1) according to the invention. It is however known from the prior art to use as floats elements made of plastic materials, which are hollow and contain air or foam. Moreover, as mentioned above, the storage of certain materials such as hydrocarbons requires the use of chemically inert materials, and some synthetic plastic materials commonly used by those skilled in the art may have the required chemical inertia .
• the floats (1) according to the invention consist of a solid or hollow plastic material. These floats (1) of plastic material may contain functional additives such as glass beads or glass fiber to ensure mechanical stability or carbon black to opacify the material or any additive to modify the electrical conductivity of the material.
• the floats (1) are made of a hollow plastic material.
• Floats (1) according to the invention are typically made of a plastic material selected from polyolefins, polyacetals, fluorinated polymers and polyamides, preferably polyoxymethylene, polyethylene and polypropylene, polytetrafluoroethylene (PTFE), polyfluoride vinylidene (PVDF) and polyamides 6 and 6-6.
• PTFE polytetrafluoroethylene
• PVDF polyfluoride vinylidene
• polyamides 6 and 6-6 polyamides 6 and 6-6.
• These polyamides, polyacetals, fluorinated polymers or polyolefins may contain functional additives to increase their mechanical properties or facilitate the manufacture of floats. This is known to those skilled in the art who will have no difficulty in adapting the additives to the product he wants to manufacture and to the manufacturing method he has selected.
• the floats (1) according to the invention consist of a plastic material selected from polyolefins, polyacetals, fluorinated polymers and polyamides, preferentially polyoxymethylene, polyethylene and polypropylene, polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF) and polyamides 6 and 6-6., To which functional additives are added.
• a plastic material selected from polyolefins, polyacetals, fluorinated polymers and polyamides, preferentially polyoxymethylene, polyethylene and polypropylene, polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF) and polyamides 6 and 6-6., To which functional additives are added.
• the body (2) of the float (1) can adopt different forms, including those described in the prior art: spherical, conical, pyramidal, ovoid, etc.
• the body (2) of the float (1) is of spherical flattened shape (see Fig. 1). It is known from the prior art to adapt the shape of the floats to the total mass of the float depending on the density of the liquid to be covered.
• the skirt (3) can adopt different shapes, especially those described in the prior art: spherical or hexagonal.
• the skirt (3) surrounding the body must adopt a shape corresponding to that of the body (2) and allowing it to come into contact with the other floats (1) and to be superimposed on the skirts (3).
• other floats (1) to form screen (5) In a preferred embodiment, the skirt (3) is in the form of a substantially flat ring.
• the skirt (3) may have at its end a radius of curvature, a chamfer or a bevel to minimize the possibility that the self-positionable floats (1) forming a screen (5) are wedged against each other following a agitation of the liquid (4).
• the float (1) according to the invention consists of a body (2) of spherical shape and a skirt (3) in the form of a ring.
• the float (1) according to the invention consists of a hollow body (2) of flattened spherical shape, of a skirt (3) in the form of a substantially flat ring, made of a material selected from polyoxymethylene, polyamide 6, polyamide 6-6, polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF ) polypropylene or polyethylene.
• PTFE polytetrafluoroethylene
• PVDF polyvinylidene fluoride
• each skirt (3) has a maximum thickness of 4 mm.
• each skirt (3) has a radius of curvature, a chamfer or a bevel.
• each float (1) has a skirt (3) whose thickness is 4 mm maximum and whose end has a radius of curvature, a chamfer or a bevel.
• the skirt (3) has a radius of curvature of between 0.5 mm and 4 mm, preferably between 1 mm and 3 mm. In a preferred embodiment, the skirt (3) has a radius of curvature of 2 mm.
• the self-positionable float (1) according to the invention is designed such that its waterline is located below the skirt (3).
• the skirt does not contribute to the floatation by constituting an additional support surface on the liquid (4) for the float (1).
• Only the lower part of the float (1) is in contact with the liquid (4), the upper part and the skirt (3) are in contact with the atmosphere of the container or the outside atmosphere depending on the situation.
• One skilled in the art will easily adapt the total mass of the float (1) and also the material and the shape of the float (1) to the density of the liquid (4) to cover.
• the fact of shifting the center of gravity located in the plane of the skirt (3) at a certain distance from the plane of the waterline is also a conventional approach for those skilled in the art.
• the float heeling phenomenon (1) is authorized by this particular structure but the heel is also controlled so that it is not excessive and does not destabilize the protection screen (5).
• the floating screen (5) consisting of self-positioning floats (1) according to the invention has an optimal recovery rate that can exceed 99% depending on the selected float form.
• the example described below relates to floats (1) of spherical flattened shape and it is with such floats (1) that this recovery rate was found in a storage tank.
• each float (1) do not rest on the surface of the liquid allows the formation of a new screen (5) and minimize the appearance of interstices when the surface of the liquid returns to calm after a lively or moderate agitation which destabilized said screen.
• the material chosen for the floats (1) and the movements of the floats (1) relative to each other must have an inertia on the chemical plane and a dissipative character of electrostatic charges. Indeed, the lower friction leading to an electrostatic charge that can accumulate could have disastrous consequences in the presence of hydrocarbon vapors or the liquid itself.
• the floating screen (5) consists of self-positionable floats (1) made of a plastic material.
• Said material is selected from polyolefins, polyacetals, fluorinated polymers and polyamides, preferentially polyoxymethylene, polyethylene and polypropylene, polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF) and polyamides 6 and 6-6.
• PTFE polytetrafluoroethylene
• PVDF polyvinylidene fluoride
• each of these elements is in a given diameter, the diameter (d3) of the skirt (3) being greater than that of the body (2) (see Fig. 4).
• the diameter (d3) of the skirt (3) is 1.366 to 2 times the diameter (d2) of the body (2), preferably 1.4 to 1.6 times the diameter (d2) of the body (2).
• the floats (1) forming a screen (5) have a spherical shape or a lens shape, these floats (1) have a symmetry particularly conducive to their self-positioning on the surface of the liquid (4).
• the screen (5) consists of floats (1) of flattened spherical or spherical shape, it is possible to provide a vertical part above and below the skirt (3) (see FIG. so that the floats (1) can not easily be superimposed when the surface of the liquid (4) is moving.
• the height of this vertical part also makes it possible to adjust the height of the center of gravity of the float relative to the surface of the liquid (4) covered according to its density.
• the present invention also describes a self-positionable float (1) within a floating screen (5) on a liquid (4) to be isolated from the atmosphere, float (1) which consists of a sealed body (2). ) flattened spherical shaped hollow, and a skirt (3) substantially flat ring-shaped around said body, and:
• the invention also describes a screen (5) floating on the surface of a liquid (4) to be isolated from the atmosphere consisting of self-positionable floats (1), characterized in that each self-positionable float (1) consists of a sealed body (2) and a substantially planar skirt (3) located around said body (2), and
• Such a screen (5) consisting of self-positionable floats (1) is particularly suitable for hydrocarbons when the floats (1) consist of a plastic material combined or not with functional additives.
• a self-positionable float (1) according to the invention has the chemical inertia essential for its function to form screen (5) on the surface of a hydrocarbon.
• each float (1) must be perfectly tight and smooth and have no roughness on its surface that could alter its self-positioning character.
• the body of the float according to the invention can be made of any material that can float.
• the float is preferably made of plastic material by injection molding. If the body (2) and the skirt (3) are made in one piece, it is necessary to fill the orifice that was used for the injection perfectly tight and without affecting the balance of the float (1) for not not affect the waterline.
• the thickness of the skirt (3) being limited, it is not obvious that the thickness of the walls of the body (2) is the same as that of the skirt (3) and it would then be necessary to make by injection -moulding one piece having different thicknesses. Except it is well known to those skilled in the art that these two technical aspects are difficult to achieve.
• the gluing means must be inert with respect to the liquid (4) to be coated, and this can be complex. It is therefore preferred a method of welding the two half-floats to form the float (1).
• the laser welding technique gives interesting results but requires that one of the half-floats is transparent to the laser and the other rendered opaque to laser radiation by adding an absorbent dye, for example carbon black. The welding is done through a laser beam that passes through the transparent half-float and very localized heats the surface to be welded of the colored half-float maintained under pressure.
• the present invention proposes a novel method of manufacturing floats (1) intended to constitute a liquid-covering screen (4) according to the invention.
• the body (2) of the float (1) is preferably made of a plastic material by injection molding.
• the plastic material is selected from polyolefins, polyacetals, fluorinated polymers and polyamides, preferably polyoxymethylene, polyethylene and polypropylene, polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF) and polyamides 6 and 6-6.
• PTFE polytetrafluoroethylene
• PVDF polyvinylidene fluoride
• Complementary half-floats are molded to the desired shape: some are equipped with a skirt (3) and a male assembly means and the others with a female assembly means.
• the half-floats carrying the skirt (3) are equipped with a female assembly means and the other half-floats of a male assembly means.
• the male assembly means is a fusible tooth and the female assembly means is a groove for channeling the melt during welding.
• the body (2) of the float (1) is composed of two parts, or half-floats, whose shapes are complementary in order to be assembled sealingly.
• One of the half-floats carries the skirt (3) according to the invention and the inside of the body (2) of the float is hollow.
• This hollow space can be filled, including foam.
• the half-float in contact with the liquid (4) is of pyramidal shape and the other half-float is not.
• the two half-floats are of identical shape.
• the two half-floats are then assembled by rotational friction welding: the friction of the contact planes leading to a heating up to the fusion of the fuse tooth.
• This welding means is reliable, waterproof and does not appear bead material that would likely unbalance the float (1) and thus affect its waterline.
• the float (1) consists of two half-floats of identical shape, one of which comprises a groove and the other comprises a fusible tooth and a skirt (3), the fusible tooth being intended to enter the groove, said half-floats are then assembled.
• the two half-floats are assembled by means of a rotational friction weld.
• the float (1) consists of two half-spheres of identical shape, one of which comprises a groove and the other comprises a fusible tooth and a skirt ( 3), the fuse tooth being intended to enter the groove, said half-spheres are then assembled, preferably by means of a rotational friction weld.
• the skirt (3) may be of any shape deemed appropriate to the shape of the container, for example round, ovoid, hexagonal, etc. In a particular embodiment, if the body (2) is spherical in shape, the skirt (3) is a ring of spherical shape.
• the assembly of the two half-floats sealingly by welding is particularly suitable use of the screen according to the invention for the recovery of hydrocarbon tanks.
• the plastic material is inert chemically and this allows to consider the use of a screen (5) made by floats (1) made entirely of a plastic material for this use in explosive atmosphere.
• the present invention describes a self-positionable float (1) as detailed above and which is composed of two half-floats of identical shape chosen as a function of the density of the liquid (4) to be covered and a half-float door the skirt (3) and a male welding means (7), and the other half-float carries a female welding means (6), the two half-floats being welded to form a perfectly sealed float (1).
• the embodiment illustrated here relates to a float (1) in the form of a flattened sphere having a skirt (3) in the form of a ring.
• FIG. 1 shows a float (1) according to the invention in section, in a floating situation on the surface of a liquid (4) in the stationary state.
• This float consists of a body (2) and a skirt (3). It is clearly seen that the float water line (1) is located below the skirt (3).
• Fig. 4 shows a top view of a float (1) of spherical shape.
• the diameter of the body (d2) is less than that of the skirt (d3).
• the diameter of the skirt (d3) is 1.366 to 2 times the diameter of the body (d2), preferably 1.4 to 1.6 times the diameter of the body (d2).
• FIG. 2 shows a sectional view of two floats (1) flotation on the surface of a liquid (4) at rest.
• the skirts (3) of each float (1) are superimposed to cover the interstices between the bodies (2).
• Fig. 3 shows a screen (5) according to the invention in view from above, or at least a screen portion (5) consisting of an assembly of seven floats (1) according to the invention. This assembly does not show any gap between the floats (1).
• the liquid (4) thus covered is perfectly isolated from the atmosphere.
• a screen consisting of floats as described in the example above is perfectly suited to the recovery of hydrocarbon tanks.
• any energy input especially in electrostatic form, must be avoided.
• the materials used for the manufacture of the floats as well as the movements they are made to make between them and against the walls of the tank are potentially at risk.
• a float according to the present invention made of an antistatic plastic material is perfectly suitable for use in ATEX conditions by the nature of the materials used and by the shape of the floats intended to cooperate to form a screen for protecting the liquid.
• a self-positionable float according to the invention is manufactured with a spherical shape whose dimensions are: 300 mm for the diameter of the body (d2), 440 mm for the diameter of the complete float (d3) consisting of the body and the skirt.
• the center of gravity of the float is located 6 mm above the steady-state waterline.
• the method of manufacture is the injection molding of polytetrafluoroethylene (PTFE), two half-floats one of which is equipped with a half-body (2) of a skirt (3) and the other is simply a complementary half-body (2).
• the two half-bodies have a complementary shape that allows them to form when assembled sealingly a floating hollow body.
• the body (2) of the float (1) consists of two half-floats whose general shape is identical, one comprising a groove and the other a fuse tooth and the skirt (3).
• Fig. 6 shows a half-float flattened spherical shape having a flat skirt and a fuse tooth. This fuse tooth is intended to allow welding to the other half float.
• the skirt (3) has a diameter of 440 mm and the spherical body (2) has a diameter of 300 mm.
• the waterline of the float (1) is located below the skirt (3).
• the distance between the skirt (3) and the surface of the liquid (4) is 6 mm.
• a self-positionable float according to the invention is manufactured with a spherical shape whose dimensions are: 150 mm for the diameter of the body (d2), 220 mm for the diameter of the complete float (d3) consisting of the body and the skirt.
• the center of gravity of the float is located 5 mm above the steady state waterline.
• the method of manufacture is the injection-molding of polyoxymethylene (POM), two half-floats one of which is equipped with a half-body (2) of a skirt (3) and the other is simply a complementary half-body (2).
• the two half-bodies have a complementary shape that allows them to form when assembled sealingly a floating hollow body.
• the body (2) of the float (1) consists of two half-floats whose general shape is identical, one comprising a groove and the other a fusible tooth and the skirt (3).
• Fig. 6 shows a half-float flattened spherical shape having a flat skirt and a fuse tooth. This fuse tooth is intended to allow welding to the other half float.
• Fig. 7 shows a half-float flattened spherical shape with a groove which is intended to allow welding to the other half float.
• the two half-floats are assembled by rotational friction welding.
• the skirt (3) has a diameter of 220 mm and the spherical body (2) has a diameter of 150 mm.
• the waterline of the float (1) is located below the skirt (3).
• the distance between the skirt (3) and the surface of the liquid (4) is 5 mm.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Level Indicators Using A Float (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=49000977

Family Applications (1)

Country Status (3)

Family Cites Families (10)

• 2013
  • 2013-04-08 FR FR1300802A patent/FR3004171B1/fr active Active
• 2014
  • 2014-04-08 WO PCT/FR2014/000078 patent/WO2014167192A1/fr not_active Ceased
  • 2014-04-08 EP EP14721433.2A patent/EP2984005B1/de active Active

Also Published As

Similar Documents

Legal Events