Classifications

• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
  • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
  • E04H12/02—Structures made of specified materials
  • E04H12/08—Structures made of specified materials of metal
  • E04H12/085—Details of flanges for tubular masts
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
  • B21D11/08—Bending by altering the thickness of part of the cross-section of the work
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D47/00—Making rigid structural elements or units, e.g. honeycomb structures
  • B21D47/01—Making rigid structural elements or units, e.g. honeycomb structures beams or pillars
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
  • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
  • E04H12/02—Structures made of specified materials
  • E04H12/08—Structures made of specified materials of metal

Definitions

• the present invention relates to drums and in particular metal drums of small diameter and thickness used as light poles or supports of overhead power lines.
• the present invention also relates to a process for the manufacture of said drums.
• a mast comprising a first shaft integral with a sole to a first end and a second barrel received in the space defined by the first barrel, characterized in that the first barrel is integral with a flange at a second end and in that the second barrel is integral with the sole at a first end and the flange at a second end.
• the conjunction of these two barrels provides sufficient stiffness for a reduced diameter, but this type of construction requires complex production processes and expensive.
• WO99 / 02779 discloses a polygonal was composed of a thin metal plate covered by thicker longitudinal strips. A space is left between each of its longitudinal strips. This space forms the edges of the east whereas the longitudinal bands form the faces of this one.
• the barrel described is composed of several parts and not a single sheet which complicates its production and increases its cost.
• the WO08 / 127168 discloses a polygonal was composed of a single metal sheet folded so that invaginations at the faces allow to increase the number of metal layers at this location. This complex structure is particularly difficult to produce.
• DE297210U1 describes cylindrical drums whose wall thickness varies.
• the object of the invention is to propose a new type of barrel and a preparation process which provide an economically advantageous solution to the problem. More particularly, the present invention provides drumsconstitués by folding plates of very high thicknesses, thus ensuring sufficient rigidity.
• the present invention relates in particular to a barrel hollow polygonal section consisting of a single folded sheet remarkable in that the thickness of said metal shell is greater at the faces than at the edges of said barrel and in that the faces of said 5fût consist only of a single layer of said sheet.
• said metal casing at the faces of said barrel is between 10 and 60 mm, even more preferably between 12 and 50 mm and quite preferably between 16 and 40 mm and the thickness of said metal shell at the edges of said barrel is between 1 and 20 mm and even more preferably between 5 and 10 mm.
• the metal casing of the drum according to the invention can be made of all metals and alloys. According to a preferred embodiment of the invention, the metal casing is made of structural steel and, quite preferably, of structural steel.
• the metal casing can also be covered in order to protect it from external aggression (physical, weather, etc.) and / or to improve its aesthetic appearance.
• the metal casing may in particular be painted or galvanized, it
• 25 may also be totally or partially dressed by a structure that is snapped onto the barrel according to the invention.
• the barrel has an outer diameter of between 200 and 500 mm and more preferably between 300 and 400 mm.
• outside diameter is meant the diameter of the circle in which is inscribed the section of the barrel according to the invention.
• the outside diameter of the barrel according to the invention may be constant or variable. According to an embodiment preferred embodiment of the invention, the outer diameter at its base is larger than the outer diameter at its top.
• the drum according to the invention has the advantage of being able to be obtained from a single sheet.
• a sheet preferably of great thickness, is grooved 1 o ng i t udi n a 1 ee n t.
• the number of grooves to be made depends on the nature of the keg that it is desired to obtain.
• a hexagonal shaped barrel is produced from sheet metal iodine comprising five longitudinal grooves, a square section barrel from a sheet comprising three longitudinal grooves. Then, the sheet is folded at said longitudinal grooves so that the longitudinal edges of said plate are in contact with each other.
• the drum according to the invention consists of a single folded sheet whose songs
• the present invention also relates to a method for producing a drum, consisting of a single sheet, according to the invention, comprising the steps of:
• said method will preferably also comprise a step consisting in producing
• the method according to the invention further comprises a step of galvanizing the barrel obtained by the method.
• the longitudinal edges are joined together by welding.
• FIGS. 1 to 5 Various embodiments of the invention are illustrated in FIGS. 1 to 5. The ratings are purely indicative.
• Figure 1 shows the section of a drum according to
• FIG. 2 shows a view from above and two side views of a sheet that can be used to produce the drum described in FIG.
• Figure 3 shows the section of a drum according to another embodiment of the invention.
• FIG. 4 shows a view from above and two side views of a plate that can be used to produce the barrel described in FIG.
• Figure 5 shows the section of a drum according to another embodiment of the invention.
• the barrel (1) of hexagonal section according to the invention, described in Figure 1, comprises a metal casing (4).
• the thickness of said metal shell is greater at the faces (2) than at the edges (3) of said barrel.
• fences (5) ( Figure 2) of rectangular shape are cut on the face of the sheet (6) which will be the outer surface of the section after folding.
• the polygonal section obtained after folding has in the corners visible recesses on the finished product.
• the grooves (5) longitudinal can be cut in the sheet (6) by milling or any other known means.
• the sheets (6) are then folded so that the folds coincide with the thinned portions by the longitudinal grooves. The folding operation can thus be carried out on a conventional press brake because the local thinning makes it possible to obtain folding conditions similar to those of a small thickness.
• the manufacturing operation is finalized by performing a longitudinal weld (7) at the longitudinal edges (8).
• the grooves (5) will be cut on the face which will constitute the inner surface of the section after folding.
• the grooves (5) in this case have a trapezoidal section, so as to avoid the interference of the edges of the groove (5) during folding.
• the finished product is a smooth polygonal cask (generally octagonal or hexagonal).
• the fluted polygonal barrel (1) (generally hexagonal)
• conical barrel (9) of small thickness.
• the conical barrel or cap (9) is fitted on the post (1). Internal spaces remaining between the cap (9) and the barrel (1) polygonal allow the circulation of fluids during stripping operations and
• the assembly of the barrel (1) and the cap (9) can be made permanently before galvanizing. It is also possible to provide different materials or coatings for the drum and cap.
• the barrel can for example be galvanized while the cap is painted. It is advantageous in such cases that the interlocking operation is the last manufacturing operation.
• the cap (9) does not necessarily cover the barrel (1) to its lower end, the latter being generally hidden under the ground level. Similarly, the cap (9) can exceed the upper end of the barrel (1), the latter being not solicited. We can thus provide the closing of the head of the pole on the cap (9) alone.
• the difference in height between the ends of the barrel (1) and the cap (9) makes it possible to accept a tolerance on the length during the operation of nesting the cap (9) on the

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• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Life Sciences & Earth Sciences (AREA)
• Chemical & Material Sciences (AREA)
• Materials Engineering (AREA)
• Wood Science & Technology (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Mechanical Engineering (AREA)
• Rigid Containers With Two Or More Constituent Elements (AREA)
• Suspension Of Electric Lines Or Cables (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

Family

ID=46197595

Family Applications (1)

Country Status (3)

Citations (4)

Family Cites Families (2)

• 2011
  • 2011-04-15 FR FR1101193A patent/FR2974136B1/fr active Active
• 2012
  • 2012-04-13 EP EP12724670.0A patent/EP2697456A2/de not_active Withdrawn
  • 2012-04-13 WO PCT/FR2012/050826 patent/WO2012140386A2/fr not_active Ceased

Patent Citations (4)

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