EP1617015B1 - Metallmast und dessen Herstellungsverfahren - Google Patents

Metallmast und dessen Herstellungsverfahren Download PDF

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Publication number
EP1617015B1
EP1617015B1 EP05291476A EP05291476A EP1617015B1 EP 1617015 B1 EP1617015 B1 EP 1617015B1 EP 05291476 A EP05291476 A EP 05291476A EP 05291476 A EP05291476 A EP 05291476A EP 1617015 B1 EP1617015 B1 EP 1617015B1
Authority
EP
European Patent Office
Prior art keywords
pole portion
mast
shaft
welding
gap
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.)
Active
Application number
EP05291476A
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English (en)
French (fr)
Other versions
EP1617015A2 (de
EP1617015A3 (de
Inventor
David Souchon
Pascal Carrier
Philippe Marteau
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.)
Valmont SA
Original Assignee
Valmont SA
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 Valmont SA filed Critical Valmont SA
Priority to PL05291476T priority Critical patent/PL1617015T3/pl
Publication of EP1617015A2 publication Critical patent/EP1617015A2/de
Publication of EP1617015A3 publication Critical patent/EP1617015A3/de
Application granted granted Critical
Publication of EP1617015B1 publication Critical patent/EP1617015B1/de
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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

Definitions

  • the invention relates to a metal mast, in particular for making a pole, and a method of manufacturing such a mast.
  • poles are conventionally used to form poles, for example street lighting poles or poles that support electrical cables for the transport and / or distribution of electricity, as is the case for the use of poles. supply of trams.
  • the large size of the mast and the significant forces that are generated at the top of it imply the use of a substantial thickness of metal, which can be of the order of 20 to 50 mm or more, if one realize the mast by means of a single drum.
  • the invention aims to provide a metal mast design that allows it to achieve it with freedom in its form, in a practical and inexpensive process that provides good protection against corrosion to all surfaces metal of the mast.
  • the invention proposes a mast comprising a first shaft secured by welding to a sole at a first end and a second shaft received in the space defined by the first shaft, characterized in that the first shaft is secured by welding to a flange at a second end and in that the second barrel is secured by welding to the sole at one end and the flange at a second end.
  • This type of assembly makes it possible in particular to reduce, or even eliminate, the areas of contact between the first barrel and the second barrel.
  • the surfaces of the drums are thus in large part accessible to the galvanizing process.
  • the transverse bulk of the second mast is strictly less than the transverse space defined by the first shaft so that a gap separates the first shaft the second barrel over their entire circumference. This gap allows access to the metal surfaces of the drums during the galvanizing step.
  • the latter comprises at least one recess forming access to the gap.
  • the flange may comprise at least one recess forming access to the gap.
  • the second barrel may comprise at least one opening forming access to the gap.
  • the second barrel has a polygonal section, for example octagonal.
  • Such a shape allows the use of a relatively thick sheet (typically more than 10 mm) for the second barrel, without, however, prejudicing the aesthetic appearance of the mast since the inner barrel is not visible from the outside.
  • the first barrel has a wall thickness smaller than the wall thickness of the second barrel.
  • the second barrel has a circular section.
  • the first barrel has for example a circular section. This form is generally quite popular on the aesthetic level.
  • the first drum may be made of sheet metal less than 10 mm thick. For this type of thickness, various shapes can be obtained with conventional means and inexpensive.
  • an intermediate shaft is received in the outer shaft and receives the inner shaft. This distributes the efforts between the different barrels.
  • the figure 1 presents the general appearance of a metal mast 2 according to a first embodiment of the invention.
  • the mast 2 mainly comprises an outer shaft 4 of frustoconical shape with a circular base (that is to say of cylindro-conical shape), an inner shaft 6 located in the space defined by the outer shaft 4 and frustoconical shape to octagonal base (that is to say octo-conical), a sole 8 located at the lower end of the barrels 4, 6 and a flange 10 located at the upper end of the barrels 4, 6.
  • the outer shaft 4 extends mainly along its vertical axis of symmetry. Its height along this axis is of the order of 10 to 20 times its diameter at the base, that is to say at its lower end. Moreover, the diameter of the outer shaft 4 varies little with height, so that the diameter at its upper end is of the order of half of its diameter at the lower end, and generally between 0.4 times and 0.7 times its diameter at the lower end.
  • the outer surface of the outer shaft 4 essentially defines the outer shape of the mast 2 and thus the overall aesthetic appearance thereof.
  • the outer shaft 4 is here made by folding a steel sheet 5 mm thick.
  • the outer shaft 4 is fixed to the sole 8 by welding, by means of a circumferential weld 5 external to the outer shaft 4.
  • the outer shaft 4 is also fixed to the flange 10 by welding on the outside of the outer shaft 4.
  • the outer shaft 4 On a limited part of its height, the outer shaft 4 has an opening 12 on a small part of its circumference, for example of the order of thirty degrees.
  • This opening 12 is generally called “ door " and allows access to the interior of the mast 2 for maintenance operations on devices possibly placed inside the mast 2.
  • the sole 8 has the general shape of a disc of axis common with the vertical axis of the mast 2 and of diameter much greater than the diameter of the base of the outer shaft 4, of the order of twice the diameter of the outer shaft 4 .
  • the outer shaft 4 is welded to the sole 8 concentrically with it and thus defines in the sole 8 a ring 9 traversed by a set of cylindrical holes 7 distributed over the entire circumference of the sole 8.
  • the holes cylindrical 7 allow the attachment of the mast to the ground, for example by means of bolts.
  • the figure 2 which has a cross section of the mast, shows particularly clearly the relative arrangement of the outer shaft 4 and the inner shaft 6.
  • the inner shaft 6 is located in the space defined by the outer shaft 4; their relative transverse dimensions leave a gap 11 between the inner shaft 6 and the outer shaft 4, ie a region 11 located outside the inner pipe 6 and inside the outer pipe 4.
  • the transverse size of the second barrel is strictly smaller than the transverse space defined by the first barrel so that a gap separates the first barrel of the second barrel over their entire circumference.
  • This gap 11 allows the flow of acid and zinc flows during the galvanizing step and thus ensures good protection of all metal surfaces against corrosion.
  • the inner shaft 6 also extends mainly in the vertical direction, here over the entire height of the mast, that is to say with a height equal to that of the outer shaft 4.
  • the inner shaft 6 is slightly frustoconical so that its bulk at its upper end is slightly smaller than its bulk at the lower end, for example in the same proportions as those mentioned above for the external shaft. 4.
  • the inner shaft 6 could be in the form of an octagonal base cylinder, that is to say with a constant octagonal section. It may be noted that this modification would have no effect on the aesthetic appearance of the mast 2 defined by the outer shaft 4 as indicated above.
  • the internal shaft 6 is made by assembling two half-drums 14 by means of longitudinal seams 16 clearly visible on the figure 2 .
  • Each half-shaft 14 thus extends over the entire height of the mast 2.
  • the half-drums 14 (and consequently the inner drum 6 they compose) are made of 15 mm thick steel sheets by folding. Obtaining the octo-conical shape of the half-drums 14, which therefore have ridges, is easily achievable with conventional means, even for relatively large thicknesses such as the one just mentioned.
  • the inner shaft 6 is fixed to the sole 8 at the lower base thereof, here by means of a weld external to the inner shaft 6, and to the flange 10 at the upper end thereof, here by means an inner weld to the inner shaft 6.
  • the inner shaft 6 is here assembled to the sole 8 and the flange 10 by fasteners independent of those of the outer shaft 4. In the present example, there is moreover no direct link between the inner shaft 6 and the external shaft 4.
  • the inner shaft 6 also has an opening 18 at the right of the door 12 formed in the outer shaft 4.
  • the sole 8 has a central opening 13 whose diameter is inscribed in the octagonal base of the inner shaft 6 so that the sole 8 receives the base of the inner shaft 6 as mentioned above.
  • the space inside the inner shaft 6 therefore communicates with the outside by means of the central opening 13 when the mast is assembled but not yet mounted on the ground.
  • the soleplate further comprises four recesses 15 regularly distributed over the circumference of the central opening 13. These recesses 15 increase locally the diameter of the central opening 13 so that it is essentially equal to that of the outer shaft 4 .
  • the recesses 15 thus allow communication between the central opening 13 and the gap 11 defined between the outer shaft 4 and the inner shaft 6, and hence between the gap 11 and the outside when the mast is assembled but not still mounted on the ground. This makes it possible to enter the acid and zinc streams in the gap 11 during the previously mentioned galvanizing step.
  • the figure 3 shows one of two gussets 22 fixed by welding to the top of the mast 2, and, precisely, welded to the flange 10 and the upper part of the outer shaft 4.
  • the gusset 22 comprises a side lug 23 provided with a through hole 24 for mounting and passing a cable.
  • the figure 4 which has the mast 2 in plan view, clearly shows the two gussets 22.
  • the head of the mast 2 comprises a shutter (or cap), or a tube forming a rise, for example welded on the flange 10.
  • the flange 10 has the general shape of a ring, with an outer diameter greater than the outer diameter of the outer shaft 4 at the top and an internal diameter inscribed in the octagonal section of the inner shaft 6 at the top.
  • the flange 10 also forms four recesses 25 regularly distributed over its internal diameter and which locally update the inner shaft 6 and the gap 11, as clearly visible on the figure 4 .
  • the recesses 25 of the flange 11 make it possible to communicate the gap 11 between the outer shaft 4 and the inner shaft 6 with the outside, in order to allow access to all the metal surfaces during the galvanizing step.
  • the entire mast 2 thus formed can then be subjected to a galvanizing process.
  • the figure 5 represents a mast according to a second embodiment of the invention.
  • the mast 100 is formed of three frustoconical drums with a circular base 102, 104, 106. In section in a plane perpendicular to their vertical axis, the drums 102, 104, 106 have circular concentric and disjoint sections, as clearly visible on the figure 6 .
  • the outer barrel 104 thus receives in its interior space the intermediate shaft 102, which itself receives in its interior space the inner shaft 106.
  • the inner diameter of the outer shaft 104 is strictly greater than the outer diameter of the intermediate shaft 102 so that a first 111 is formed on the entire periphery of the drums 102, 104.
  • the inside diameter of the intermediate shaft 102 is strictly greater than the outside diameter of the inner shaft 106, so that a second gap 113 is formed between the intermediate shaft 102 and the inner shaft 106.
  • the outer shaft 104 and the inner shaft 106 are each attached at their lower end to a sole 108 and at their upper end to a flange 110.
  • the fasteners are here made by welding; the welds at the lower ends of each barrel 104, 106 are deposited outside thereof.
  • the external barrel 104 is also welded to the flange 110 outside the outer barrel 104, whereas the weld that joins the inner barrel 106 to the flange 110 is formed on the inside of the inner barrel 106.
  • the intermediate shaft 102 is fixed by welding to the sole 108 at the lower base thereof.
  • the intermediate barrel is for example welded to one of the other barrels.
  • Each barrel 102, 104, 106 is made by folding a sheet of 6 mm thick with closure by means of a longitudinal weld 120.
  • the mast 100 has a door 112 of the same type as the door described for the first embodiment and therefore will not be described in detail here.
  • the door 112 is made by openings facing each other in the barrels 102, 104, 106.
  • the sole 108 is generally identical to the sole of the first embodiment and will therefore not be described in detail here. It may be noted, however, that the sole 108 has a central opening 114 which allows the interior space of the mast 100 to be communicated downwards when the mast 100 is assembled but not mounted on the ground. Furthermore, the central opening 114 is locally enlarged by four recesses 115 distributed over the entire circumference of the central opening 114 and which allow access to each of the first gap 111 and the second gap 113 from the central opening 114.
  • the first embodiment it thus facilitates the access of the acid and zinc streams inside the first gap 111 and the second gap 113 during the galvanizing step, to effectively protect the assembly.
  • the flange 110 is made in the form of a ring whose outer diameter allows the external barrel 104 to be fixed and whose inside diameter allows the internal barrel 106 to be fixed.
  • the flange 110 also comprises four recesses 116 regularly distributed over the circumference of the latter, which in particular update the inner shaft 106, the second gap 113, the intermediate shaft 102 and the first gap 111.
  • Each recess 116 thus allows access to the first gap 111 and second interstice 113 from outside the mast, as clearly visible on the figure 7 . This access will be used in particular during the galvanizing step as already explained above.
  • the mast has two gussets 118 mounted at the top thereof for receiving and supporting electrical cables.
  • the figures 8 and 9 represent a variant of the second embodiment.
  • a mast 200 comprises an inner shaft 206, an intermediate shaft 202 and a frustoconical outer shaft 204 with a circular base, disjoint to each other and mounted concentrically between a sole 208 and a flange 210.
  • the outer shaft 204 and the inner shaft 206 in particular are attached to the sole 208 on the one hand and the flange 210 on the other hand by welding.
  • FIG. 9 which represents the mast according to section BB indicated in FIG. figure 8 solid rods with circular sections 212 (here of diameter 5 mm) are inserted into the interstices created between the different drums.
  • the rods 212 are for example welded to the barrel immediately inside the gap which contains each. These rods 212 may in certain cases make it possible to improve the mechanical strength of the mast 200. However, thanks to the independent fastenings relative to each other of the outer shaft 204 and the inner shaft 206 at their two ends each, it is it is possible to provide rods 212 only over part of the height of the mast 200.
  • the intermediate barrel 202 and the inner barrel 206 each comprise openings 214 facing each other in order to allow the circulation of the acid, then zinc, during the step galvanizing, despite the presence of rods 212.
  • openings 216 are made in the inner shaft 206 and the intermediate shaft 202 in the lower part of the mast, as shown in FIG. figure 8 .

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Road Signs Or Road Markings (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Earth Drilling (AREA)
  • Suspension Of Electric Lines Or Cables (AREA)
  • Laminated Bodies (AREA)

Claims (13)

  1. Mast mit einem ersten Schaft (4; 104; 204), der an einem ersten Ende mit einer Bodenplatte (8; 108; 208) durch Schweißen fest verbunden ist, und einem zweiten Schaft (6; 106; 206), der in dem durch den ersten Schaft (4; 104; 204) gebildeten Raum aufgenommen ist,
    dadurch gekennzeichnet, dass der erste Schaft (4; 104; 204) an einem zweiten Ende mit einem Flansch (10; 110; 210) durch Schweißen fest verbunden ist, und dass der zweite Schaft (6; 106; 206) an einem ersten Ende mit der Bodenplatte (8; 108; 208) und an einem zweiten Ende mit dem Flansch (10; 110; 210) durch Schweißen fest verbunden ist.
  2. Mast nach Anspruch 1,
    dadurch gekennzeichnet, dass der Querschnittsraumbedarf des zweiten Schafts (6; 106; 206) wenigstens an einem Teil der Masthöhe unbedingt geringer ist als der durch den ersten Schaft (4; 104; 204) gebildete Querschnittsraum, so dass ein Spalt (11; 111, 113) den ersten Schaft von dem zweiten Schaft über deren gesamten Umfang trennt.
  3. Mast nach Anspruch 2,
    dadurch gekennzeichnet, dass die Bodenplatte (8; 108; 208) wenigstens eine Aussparung (15; 115) aufweist, die einen Zugang zu dem Spalt (11; 111, 113) bildet.
  4. Mast nach Anspruch 2 oder 3,
    dadurch gekennzeichnet, dass der Flansch (10; 110; 210) wenigstens eine Aussparung (25; 116) aufweist, die einen Zugang zu dem Spalt bildet.
  5. Mast nach einem der Ansprüche 2 bis 4,
    dadurch gekennzeichnet, dass der zweite Schaft (6; 106; 206) wenigstens eine Öffnung (214, 216) aufweist, der einen Zugang zu dem Spalt bildet.
  6. Mast nach einem der Ansprüche 1 bis 5,
    dadurch gekennzeichnet, dass der zweite Schaft (5) einen polygonale Querschnitt hat.
  7. Mast nach Anspruch 6,
    dadurch gekennzeichnet, dass der erste Schaft (4) eine Wandstärke hat, die geringer ist als die Wandstärke des zweiten Schafts (6).
  8. Mast nach Anspruch 6,
    dadurch gekennzeichnet, dass der zweite Schaft (6) aus einem Blech mit einer Stärke von mehr als 10 mm ausgeführt ist.
  9. Mast nach einem der Ansprüche 1 bis 5,
    dadurch gekennzeichnet, dass der zweite Schaft (106; 206) einen runden Querschnitt hat.
  10. Mast nach einem der Ansprüche 1 bis 9,
    dadurch gekennzeichnet, dass der erste Schaft (4; 104; 204) einen runden Querschnitt hat.
  11. Mast nach einem der Ansprüche 1 bis 10,
    dadurch gekennzeichnet, dass der erste Schaft ( 4; 104; 204) aus einem Blech mit einer Stärke von weniger als 10 mm ausgeführt ist.
  12. Mast nach einem der Ansprüche 1 bis 11,
    dadurch gekennzeichnet, dass ein Zwischenschaft (102; 202) in dem äußeren Schaft (104; 204) aufgenommen wird und den inneren Schaft (106; 206) aufnimmt.
  13. Verfahren zum Ausführen eines Mastes,
    dadurch gekennzeichnet, dass es die folgenden Schritte umfasst:
    - Befestigen eines inneren Schafts (6; 106; 206) an der Bodenplatte (8; 108; 208) durch Schweißen;
    - Anbringen eines äußeren Schafts (4; 104; 204) derart, dass der äußere Schaft (4; 104; 204) den inneren Schaft (6; 106; 206) aufnimmt, und Befestigen des äußeren Schafts (4; 104; 204) an der Bodenplatte (8; 108; 208) durch Schweißen;
    - Befestigen eines Flansches(10; 110; 210) an dem inneren Schaft (6; 106; 206) und an dem äußeren Schaft (4; 104; 204) durch Schweißen.
EP05291476A 2004-07-16 2005-07-07 Metallmast und dessen Herstellungsverfahren Active EP1617015B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05291476T PL1617015T3 (pl) 2004-07-16 2005-07-07 Maszt metalowy i sposób jego wykonania

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0407929A FR2873142B1 (fr) 2004-07-16 2004-07-16 Mat metallique et son procede de realisation

Publications (3)

Publication Number Publication Date
EP1617015A2 EP1617015A2 (de) 2006-01-18
EP1617015A3 EP1617015A3 (de) 2006-10-04
EP1617015B1 true EP1617015B1 (de) 2009-09-30

Family

ID=34948223

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05291476A Active EP1617015B1 (de) 2004-07-16 2005-07-07 Metallmast und dessen Herstellungsverfahren

Country Status (7)

Country Link
EP (1) EP1617015B1 (de)
AT (1) ATE444426T1 (de)
DE (2) DE05291476T1 (de)
ES (1) ES2265306T3 (de)
FR (1) FR2873142B1 (de)
PL (1) PL1617015T3 (de)
PT (1) PT1617015E (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD887026S1 (en) 2018-04-12 2020-06-09 P4 Infrastructure, Inc. Mast base connector

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2974136B1 (fr) 2011-04-15 2014-03-28 Petitjean Fut de faible diametre et de forte epaisseur.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1903907A (en) * 1928-07-05 1933-04-18 Union Metal Mfg Co Metal pole with reenforcing pipes
US3040846A (en) * 1960-09-12 1962-06-26 Abberly Nicholas Rippen Built-up hollow field-weldable structural steel length

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD887026S1 (en) 2018-04-12 2020-06-09 P4 Infrastructure, Inc. Mast base connector
USD983415S1 (en) 2018-04-12 2023-04-11 P4 Infrastructure, Inc. Mast base connector

Also Published As

Publication number Publication date
DE05291476T1 (de) 2006-11-30
FR2873142B1 (fr) 2007-12-14
FR2873142A1 (fr) 2006-01-20
PL1617015T3 (pl) 2010-02-26
EP1617015A2 (de) 2006-01-18
ES2265306T1 (es) 2007-02-16
DE602005016866D1 (de) 2009-11-12
EP1617015A3 (de) 2006-10-04
ATE444426T1 (de) 2009-10-15
ES2265306T3 (es) 2010-01-29
PT1617015E (pt) 2009-12-10

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