WO2013080132A1 - Armature for concrete coating of tubes - Google Patents

Armature for concrete coating of tubes Download PDF

Info

Publication number
WO2013080132A1
WO2013080132A1 PCT/IB2012/056784 IB2012056784W WO2013080132A1 WO 2013080132 A1 WO2013080132 A1 WO 2013080132A1 IB 2012056784 W IB2012056784 W IB 2012056784W WO 2013080132 A1 WO2013080132 A1 WO 2013080132A1
Authority
WO
WIPO (PCT)
Prior art keywords
armature
wire
protrusions
tubes
wires
Prior art date
Application number
PCT/IB2012/056784
Other languages
French (fr)
Inventor
Giovanni Cavatorta
Original Assignee
Metallurgica Abruzzese S.P.A.
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 Metallurgica Abruzzese S.P.A. filed Critical Metallurgica Abruzzese S.P.A.
Publication of WO2013080132A1 publication Critical patent/WO2013080132A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F27/00—Making wire network, i.e. wire nets
    • B21F27/12—Making special types or portions of network by methods or means specially adapted therefor
    • B21F27/121—Making special types or portions of network by methods or means specially adapted therefor of tubular form, e.g. as reinforcements for pipes or pillars
    • B21F27/127—Making special types or portions of network by methods or means specially adapted therefor of tubular form, e.g. as reinforcements for pipes or pillars by bending preformed mesh
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/12—Making tubes or metal hoses with helically arranged seams
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
    • E04C5/03—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance with indentations, projections, ribs, or the like, for augmenting the adherence to the concrete
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
    • E04C5/04—Mats
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F16L58/04—Coatings characterised by the materials used
    • F16L58/06—Coatings characterised by the materials used by cement, concrete, or the like

Definitions

  • the present invention relates to an armature for concrete coating of tubes. It refers in particular to armatures for coating underwater conduits.
  • the object of the present invention is to limit the problems indicated above as far as possible.
  • An advantage of the present invention is providing an armature which, with the same performance, is cheaper than the known armatures.
  • Figure 1 shows a schematic view of a known machine for coating tubes
  • Figure 2 shows a view of a stretch of the armature tape in question
  • Figure 3 shows an enlarged section view of a detail of figure 1 .
  • the armature in question is applied, using widely known systems and technologies, to realise a concrete coating for tubes 1 normally used for the realisation of underwater conduits.
  • This armature is realised through a continuous metal band 2 that is constituted by a mesh of electro-welded wires 3.
  • the meshes that constitute the band have a standard width of 190.5 cm and are realised with circular-section wires, normally zinc-plated, having diameters comprised between 1 .5 and 5 mm.
  • the band is realised with longitudinal and transversal wires that may be straight or shaped; for the longitudinal and transversal wires, wires having different diameters can be used.
  • the wires 3 with which the metal band (i.e. the armature) in question is realised comprise protrusions 4 that project from the external surface of the wire, are obtained along their entire development and are arranged with various lies with respect to the axis of the wire itself.
  • the protrusions 4 can have a spiral shape that winds along the whole length of the wire and that can have one or two screw leads with a preferably constant pitch and comprised between 1 and 4 times the diameter of the wire onto which it is wound.
  • the protrusions can also have different shapes; for example, they can have a circular shape and be arranged parallel and distanced along all the length of the wire; or they can be shaped as segments, or discontinuous elements, which can be arranged at various angulations with respect to the axis of the wire and along the whole length of the wire itself.
  • the protrusions that project from the wires preferably have a height, measured in a radial direction of the wire, that is comprised between 20 and 50% of the diameter of the wire itself.
  • the protrusions described can be envisaged on the longitudinal or transversal wires of the mesh, or on both.
  • armatures can be used having wires with a lower diameter, hence weight; therefore the cost of the material used to realise the armature is reduced, to the extent that it fully compensates for the slightly higher cost of the wire constituting the metal mesh band.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Ropes Or Cables (AREA)
  • Paints Or Removers (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)

Abstract

The present invention relates to an armature for concrete coating of tubes (1 ). The armature in question is realised through a continuous metal band (2) constituted by a mesh of circular-section electro-welded wires (3), which have protrusions (4) projecting from the external surface of the wire and can have various shapes and lies with respect to the axis of the wire itself.

Description

ARMATURE FOR CONCRETE COATING OF TUBES. Field of the invention
The present invention relates to an armature for concrete coating of tubes. It refers in particular to armatures for coating underwater conduits.
Background Art
The art of coating underwater conduits with reinforced concrete has been known for some time; this is performed both to make such conduits heavier, hence preventing them floating, and to provide protection against the corrosion of the conduits themselves. These coatings are normally obtained with a continuous metal band, constituted by a metal mesh generally realised with electro-welded wires, which acts as an armature; the width of this mesh is standard and is 190.5 cm. Through appropriate and known machinery, at the time of laying the tube in water such a band is wound in a spiral onto the tube and simultaneously buried in the concrete that is sprayed onto the external surface of the tube to conglobate and cover the armature. All of the above has been known for some time and described, for example, in patent US4033387.
The problems connected with such technology relate to the need to prevent cracks or damage to the concrete coating of tubes, since this could lead to corrosion problems or damage to the conduits.
The object of the present invention is to limit the problems indicated above as far as possible.
An advantage of the present invention is providing an armature which, with the same performance, is cheaper than the known armatures.
These objects and advantages and others are reached by the present invention as characterised by the following claims.
Disclosure of the invention
Further characteristics and advantages of the invention will become clear from the following detailed description of a preferred but not exclusive embodiment of the armature in question, illustrated by way of non-limiting example in the attached figures wherein:
Figure 1 shows a schematic view of a known machine for coating tubes;
Figure 2 shows a view of a stretch of the armature tape in question; · Figure 3 shows an enlarged section view of a detail of figure 1 .
The armature in question is applied, using widely known systems and technologies, to realise a concrete coating for tubes 1 normally used for the realisation of underwater conduits. This armature is realised through a continuous metal band 2 that is constituted by a mesh of electro-welded wires 3. The meshes that constitute the band have a standard width of 190.5 cm and are realised with circular-section wires, normally zinc-plated, having diameters comprised between 1 .5 and 5 mm. The band is realised with longitudinal and transversal wires that may be straight or shaped; for the longitudinal and transversal wires, wires having different diameters can be used.
The wires 3 with which the metal band (i.e. the armature) in question is realised comprise protrusions 4 that project from the external surface of the wire, are obtained along their entire development and are arranged with various lies with respect to the axis of the wire itself.
In particular the protrusions 4 can have a spiral shape that winds along the whole length of the wire and that can have one or two screw leads with a preferably constant pitch and comprised between 1 and 4 times the diameter of the wire onto which it is wound.
The protrusions can also have different shapes; for example, they can have a circular shape and be arranged parallel and distanced along all the length of the wire; or they can be shaped as segments, or discontinuous elements, which can be arranged at various angulations with respect to the axis of the wire and along the whole length of the wire itself.
The protrusions that project from the wires preferably have a height, measured in a radial direction of the wire, that is comprised between 20 and 50% of the diameter of the wire itself. The protrusions described can be envisaged on the longitudinal or transversal wires of the mesh, or on both.
With the armatures described above, with respect to known armatures, better results are obtained in terms of adhesion to the concrete mortar and therefore the possibilities of movement of the armature and the dangers of cracking or damage to the concrete coating of the tubes are substantially reduced.
Furthermore, with the same performance, armatures can be used having wires with a lower diameter, hence weight; therefore the cost of the material used to realise the armature is reduced, to the extent that it fully compensates for the slightly higher cost of the wire constituting the metal mesh band.

Claims

1 . An armature for concrete coating of tubes, of a type to be applied to tubes (1 ) for underwater conduits and realised with a continuous metal band (2) constituted by a mesh of circular-section electro-welded wires (3), characterised in that the wires (3) with which the metal band is realised comprise, along an entire development thereof, protrusions (4) projecting from the external surface of the wire and arranged with various lies with respect to the axis of the wire itself.
2. The armature of claim 1 , characterised in that the said protrusions are spiral-shaped and wind along a whole length of the wire.
3. The armature of claim 2, characterised in that the said spiral protrusions wind along the wire with two screw leads.
4. The armature of claim 2, characterised in that the pitch of the spiral realising the protrusion is comprised between 1 and 4 times the diameter of the wire on which it is wound.
5. The armature of claim 2, characterised in that said protrusions have a circular shape and are arranged parallel and distanced along all the length of the wire.
6. The armature of claim 1 , characterised in that the said protrusions are shaped as discontinuous segments and are arranged at various angulations with respect to the axis of the wire.
7. The armature of claim 1 , characterised in that the said protrusions have a height, in a radial direction of the wire, comprised between 20 and 50% of the diameter of the wire.
PCT/IB2012/056784 2011-11-30 2012-11-28 Armature for concrete coating of tubes WO2013080132A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000310A ITMO20110310A1 (en) 2011-11-30 2011-11-30 REINFORCEMENT FOR CEMENTITIOUS PIPE COATING.
ITMO2011A000310 2011-11-30

Publications (1)

Publication Number Publication Date
WO2013080132A1 true WO2013080132A1 (en) 2013-06-06

Family

ID=45370631

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2012/056784 WO2013080132A1 (en) 2011-11-30 2012-11-28 Armature for concrete coating of tubes

Country Status (2)

Country Link
IT (1) ITMO20110310A1 (en)
WO (1) WO2013080132A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US815618A (en) * 1905-04-20 1906-03-20 William Mueser Materials of construction.
US1288763A (en) * 1918-07-02 1918-12-24 Claude A P Turner Deformed bar.
US4033387A (en) 1974-09-27 1977-07-05 N.V. Bekaert S.A. Method of making a reinforcing strip
EP1491699A1 (en) * 2003-06-25 2004-12-29 Erico International Corporation Deformed reinforcing bar splice and method
GB2411183A (en) * 2004-02-20 2005-08-24 Compania Espanola De Laminacio Bar for reinforced concrete

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US815618A (en) * 1905-04-20 1906-03-20 William Mueser Materials of construction.
US1288763A (en) * 1918-07-02 1918-12-24 Claude A P Turner Deformed bar.
US4033387A (en) 1974-09-27 1977-07-05 N.V. Bekaert S.A. Method of making a reinforcing strip
EP1491699A1 (en) * 2003-06-25 2004-12-29 Erico International Corporation Deformed reinforcing bar splice and method
GB2411183A (en) * 2004-02-20 2005-08-24 Compania Espanola De Laminacio Bar for reinforced concrete

Also Published As

Publication number Publication date
ITMO20110310A1 (en) 2013-05-31

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