WO1998042052A1 - Elongated tubular product, such as in particular an installation conduit - Google Patents

Elongated tubular product, such as in particular an installation conduit Download PDF

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Publication number
WO1998042052A1
WO1998042052A1 PCT/FR1998/000519 FR9800519W WO9842052A1 WO 1998042052 A1 WO1998042052 A1 WO 1998042052A1 FR 9800519 W FR9800519 W FR 9800519W WO 9842052 A1 WO9842052 A1 WO 9842052A1
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WO
WIPO (PCT)
Prior art keywords
lubricant
tubular product
solid
product according
matrix
Prior art date
Application number
PCT/FR1998/000519
Other languages
French (fr)
Inventor
Christian Blanc
Eric Pirony
Claude Trichard
Original Assignee
Novoplastic
Novotech
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 GB9919234A priority Critical patent/GB2337367B/en
Application filed by Novoplastic, Novotech filed Critical Novoplastic
Priority to UA99105579A priority patent/UA57069C2/en
Priority to EEP199900407A priority patent/EE9900407A/en
Priority to SK1214-99A priority patent/SK283429B6/en
Priority to AU69234/98A priority patent/AU741152B2/en
Priority to BR9806324-3A priority patent/BR9806324A/en
Priority to NZ337348A priority patent/NZ337348A/en
Priority to RO99-00973A priority patent/RO120440B1/en
Priority to SI9820024A priority patent/SI20133A/en
Priority to DE19882152T priority patent/DE19882152T1/en
Priority to JP54019698A priority patent/JP2001521604A/en
Publication of WO1998042052A1 publication Critical patent/WO1998042052A1/en
Priority to LVP-99-130A priority patent/LV12425B/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
    • 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
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/12—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting
    • F16L11/121—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting specially profiled cross sections
    • 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
    • F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
    • F16L3/26—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets specially adapted for supporting the pipes all along their length, e.g. pipe channels or ducts
    • 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
    • F16L9/00—Rigid pipes
    • F16L9/12—Rigid pipes of plastics with or without reinforcement
    • F16L9/121—Rigid pipes of plastics with or without reinforcement with three layers
    • 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
    • F16L9/00—Rigid pipes
    • F16L9/12—Rigid pipes of plastics with or without reinforcement
    • F16L9/133—Rigid pipes of plastics with or without reinforcement the walls consisting of two layers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439—Auxiliary devices
    • G02B6/4459—Ducts; Conduits; Hollow tubes for air blown fibres
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
    • H02G3/0462—Tubings, i.e. having a closed section
    • H02G3/0481—Tubings, i.e. having a closed section with a circular cross-section
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G9/00—Installations of electric cables or lines in or on the ground or water
    • H02G9/06—Installations of electric cables or lines in or on the ground or water in underground tubes or conduits; Tubes or conduits therefor

Definitions

  • the present invention relates to an elongated tubular product, generally having the same section along its entire longitudinal direction, and comprising a solid tube, constituted by at least one plastic material, at the same time flexible enough to be itself wound up. and unrolled, and rigid enough to withstand itself a centripetal or centrifugal radial force.
  • the present invention intends to group under the same concept, for example both an installation conduit, of at least one cable or a pipe, then contained in said installation conduit, that a sheath of protection of at least one cable, for example electrical.
  • the present invention intends to cover any conduit generally ensuring the transfer or the transport of a flow, whether it is a fluid (water or gas by example), energy (electricity for example), or information or signals (video transmission by optical cable for example), or data in the form of electrical, analog, digital signals, etc.
  • a fluid water or gas by example
  • energy electricity for example
  • information or signals video transmission by optical cable for example
  • data data in the form of electrical, analog, digital signals, etc.
  • the surface layer consists of a lubricating film or coating, either solid or liquid.
  • a lubricating film or coating this is for example a polyethylene plastic matrix in which solid particles, for example graphite, can be distributed.
  • a lubricating liquid coating this is for example a silicone-based oil.
  • the document EP 0 326 711 describes a solution comparable to that defined above, in the sense that the solid surface layer constitutes the internal layer of a tube coextruded with an external layer.
  • the surface layer consisting of a lubricating grease or paste, but adherent, is added and remains on the inside of the tube.
  • This lubricating paste or grease itself consists of a mixture of a liquid lubricant and particles of a solid lubricant.
  • the present invention relates to an elongated tubular product, with an almost dry, permanent lubrication, of the friction surface (s) of the solid tube, significantly reducing friction, including compared to the solutions previously identified and discussed.
  • a synergistic action has been discovered for this purpose between: - on the one hand, particles of a lubricant of a solid nature, distributed in the plastic matrix of the surface layer, and at least partly flush with the free surface thereof, and on the other hand, a lubricant of a liquid nature, compatible with the plastic matrix, dispersed in the surface layer, practically without wetting the free surface of the latter.
  • an installation conduit becomes in a way universal, in the sense that it is compatible, without further modification, with all current installation techniques, whether it is drafting techniques, for example with a cable, or blowing techniques, for example with a ferret, or by blowing-pushing.
  • the lubricant system according to the invention makes it possible to eliminate, at least in part, the static charges generated by the friction between the conduit and the cable, during installation. of the last.
  • the present invention also has the following secondary characteristics: the solid lubricant has a lamellar structure, and is for example graphite, or also has a polymer structure with long, straight, oriented chains, and is for example a polytetrafluoroethylene,
  • the particles of the solid lubricant are micro-beads having a diameter at most equal to 20 ⁇ m, and preferably between 1 and 15 ⁇ m,
  • the liquid lubricant is preferably but not exclusively a silicone; it has a viscosity at most equal to 1000 centisto es, at room temperature, and for example between 10 and 1000 centistokes; the thickness of the liquid lubricant film on the free surface of the surface layer does not exceed 1 ⁇ m,
  • the solid lubricant constitutes a filler, the surface layer is irregular along the periphery of the solid tube, and corresponds for example to longitudinal ribs or grooves; but this same surface layer can be continuous, following the periphery of the solid tube.
  • the solid tube which is constituted by the single plastic matrix, in which, on the one hand, particles of the dry lubricant are distributed, partially flush with at least one free surface, interior or exterior, and constituting a dry friction surface, and on the other hand a liquid lubricant is diffused, practically without wetting, neither the outer surface nor the inner surface of this same matrix.
  • the solid lubricant constitutes a filler, the weight proportion of which is at least equal to 5% of the plastic matrix, in particular between 5% by weight and 20% by weight of this same matrix.
  • the matrix comprises, in the diffused state, a liquid lubricant, which constitutes a sort of additive, its proportion being at least equal to 0.02% by weight of the plastic matrix, and in particular included between 0.02% by weight and 0.08% by weight of this same matrix.
  • a liquid lubricant which constitutes a sort of additive, its proportion being at least equal to 0.02% by weight of the plastic matrix, and in particular included between 0.02% by weight and 0.08% by weight of this same matrix.
  • the proportion of solid lubricant / liquid lubricant is at least equal to 5% and is in particular between 5% and 20%.
  • FIG. 1 shows schematically, in axial section an installation conduit according to
  • FIG. 2 shows in axial section a cable protection sheath according to the invention
  • FIG. 3 represents in cross section an installation sheath according to the invention, but according to another embodiment of the latter,
  • an installation duct is constituted by a solid or rigid tube 1, made of charged plastic material (for example high density polyethylene), both sufficiently flexible to be itself wound and unwound, and sufficiently rigid to withstand itself a centripetal or centrifugal radial force.
  • This solid tube has a dry friction surface, corresponding to its interior surface.
  • a surface layer 3 at least is formed, the free surface of which constitutes the dry friction surface (internal surface 2).
  • This surface layer comprises a plastic matrix, corresponding to that of the solid tube, in which particles 4 (micro-balls) of a solid lubricant are distributed, partly flush with the free surface 2.
  • an installation duct according to the invention, represented in FIG. 3, the latter comprises three concentric layers 6, 7 and 8, optionally constituted by respectively different plastics, one exterior 7, the other inner 6, in which the surface layer 3 is integrated, and the other median or intermediate 8.
  • the surface layer 3 is discontinuous, following the periphery of the solid tube 1, and includes, for example, ribs 9 or adjacent, longitudinal.
  • this same surface layer 3 can be continuous, following the periphery of the solid tube 1.
  • the surface layer 3 is obtained by projecting or diffusing at inside the tube 1, after extrusion but in the visco-elastic phase, the solid lubricant, in particulate form, mixed with the liquid lubricant.
  • the solid lubricant and the liquid lubricant are incorporated into the plastic matrix of the tube, at least on the surface.
  • HDPE high density polyethylene
  • PCD having an inner diameter of 27 mm and a thickness of 3 mm, is extruded on a CMS60 machine of the
  • a suspension of a polytetrafluorethylene (PTFE) powder (commercial reference UNILUB T3 of the Company UNIFLON) having an average particle size of 16 ⁇ m, in a silicone oil (commercial reference 47V100 of the Company PENN HITE) having a viscosity of 100 censtistokes, is projected in divided form inside the extruded tube, while it is still viscoelastic.
  • PTFE powder represents 20% by weight (PTFE) relative to the oil.
  • the coefficient of friction between the internal surface of such a tube, compared to a HDPE sheath (same commercial reference as above) is 0.075.
  • the PTFE powder and the silicone oil act in synergistic action to reduce the coefficient of friction, because: the coefficient of friction obtained, without treatment of the internal surface of the tube is 0.19, the coefficient of friction obtained, with projection of the silicone oil alone is 0.102.
  • EXAMPLE 2
  • an 8 mm cable is pushed by blowing, with a ferret.
  • the interior surface of the installation duct is coated with the liquid lubricant (silicone oil), identified in Example 1.
  • the interior surface is coated with a solid, identical lubricant powder to that of Example 1.
  • An installation conduit made of high density polyethylene, with an internal diameter of 27 mm and a thickness of 3 mm, is used for an installed cable with an external diameter of 17.6 mm, with a coating of the internal surface of the conduit, firstly with a silicone oil having a viscosity of lOOCp, secondly with a Teflon® powder of 10 ⁇ m particle size, and thirdly with a mixture of powder in the abovementioned oil, up to 10% by weight of the powder relative to in oil.
  • the friction coefficients measured, when pushing / carrying the cable are respectively 0.102; 0.071 and 0.0061.
  • a lubricant mixture comprising a liquid lubricant (silicone) having a viscosity of 100 Cp, and an increasing proportion by weight of a solid lubricant (Teflon® powder having the same particle size as previously, namely 5, 10, 15 and 20% by weight respectively .
  • the coefficients of friction measured during the blowing / carrying of the cable are respectively 0.086; 0.085; 0.089; 0.090.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Lubricants (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Insulated Conductors (AREA)
  • Laminated Bodies (AREA)
  • Electric Cable Installation (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

The invention concerns an elongated tubular product with the same cross section along its whole length, comprising a solid tube (1) made of at least a plastic material, both sufficiently flexible to be wound and unwound, and sufficiently rigid to resist a centripetal or centrifugal radial force, said solid tube comprising, on the inside and/or on the outside, a surface coating (3) whose free surface constitutes a friction surface and comprising a plastic matrix in which is distributed a lubricant. The invention is characterised in that, with synergistic effect, the particles (4) of a solid lubricant are distributed in the plastic matrix, at least partly flush at the free surface of the surface coating, and a liquid lubricant, compatible with the plastic matrix, is dispersed in the surface coating, practically without wetting the free surface of the latter.

Description

PRODUIT TUBULAIRE ALLONGE, NOTAMMENT DU TYPE CONDUIT ELONGATED TUBULAR PRODUCT, ESPECIALLY OF THE CONDUIT TYPE
D'INSTALLATION La présente invention concerne un produit tubulaire allongé, présentant de manière générale la même section selon toute sa direction longitudinale, et comprenant un tube solide, constitué par au moins une matière plastique, à la fois suffisamment souple pour être lui-même enroulé et déroulé, et suffisamment rigide pour résister lui-même à un effort radial centripète ou centrifuge.The present invention relates to an elongated tubular product, generally having the same section along its entire longitudinal direction, and comprising a solid tube, constituted by at least one plastic material, at the same time flexible enough to be itself wound up. and unrolled, and rigid enough to withstand itself a centripetal or centrifugal radial force.
Par la définition générique précédente, la présente invention entend regrouper sous un même concept, par exemple aussi bien un conduit d'installation, d'au moins un câble ou un tuyau, ensuite contenu dans ledit conduit d'installation, qu'une gaine de protection d'au moins un câble, par exemple électrique.By the preceding generic definition, the present invention intends to group under the same concept, for example both an installation conduit, of at least one cable or a pipe, then contained in said installation conduit, that a sheath of protection of at least one cable, for example electrical.
Par ailleurs, par les expressions "câble" ou "tuyau", la présente invention entend couvrir tout conduit assurant de manière générale le transfert ou le transport d'un flux, qu'il s'agisse d'un fluide (eau ou gaz par exemple) , d'une énergie (électricité par exemple) , ou encore d'informations ou signaux (vidéo-transmission par câble optique par exemple) , ou de données sous forme de signaux électriques, analogiques, numériques, etc.. Pour introduire et définir la présente invention, on se référera maintenant, à titre d'exemple, aux conduits d'installation, et/ou aux câbles ou tuyaux installés dans lesdits conduits.Furthermore, by the expressions "cable" or "pipe", the present invention intends to cover any conduit generally ensuring the transfer or the transport of a flow, whether it is a fluid (water or gas by example), energy (electricity for example), or information or signals (video transmission by optical cable for example), or data in the form of electrical, analog, digital signals, etc. To introduce and define the present invention, reference will now be made, by way of example, to installation conduits, and / or to cables or pipes installed in said conduits.
De manière à limiter les travaux de génie civil, et en particulier le nombre de chambres de tirage, il est connu de lubrifier la surface de frottement, correspondant à la surface intérieure du tube solide formant le conduit d'installation, et/ou la surface extérieure de la gaine de protection, de câbles par exemple. Ceci permet en effet d'augmenter la longueur de tube pouvant être installée. Cette lubrification est apportée en général dans une couche superficielle, du côté intérieur et/ou du côté extérieur du tube, dont la surface libre constitue une surface de frottement. Différentes solutions ont été proposées à cette fin.In order to limit the civil engineering works, and in particular the number of drawing chambers, it is known to lubricate the friction surface, corresponding to the interior surface of the solid tube forming the installation duct, and / or the surface outside of the protective sheath, for example cables. This in fact makes it possible to increase the length of tube that can be installed. This lubrication is generally provided in a surface layer, on the inside and / or on the outside of the tube, the free surface of which constitutes a friction surface. Different solutions have been proposed for this purpose.
Conformément au document 093/14546, la couche superficielle consiste en un film ou revêtement lubrifiant, soit solide, soit liquide. Dans le cas d'un revêtement solide lubrifiant, il s'agit par exemple d'une matrice plastique en polyéthylène dans laquelle des particules solides, par exemple de graphite, peuvent être distribuées. Dans le cas d'un revêtement liquide lubrifiant, il s'agit par exemple d'une huile à base de silicone.According to document 093/14546, the surface layer consists of a lubricating film or coating, either solid or liquid. In the case of a solid lubricant coating, this is for example a polyethylene plastic matrix in which solid particles, for example graphite, can be distributed. In the case of a lubricating liquid coating, this is for example a silicone-based oil.
Le document EP 0 326 711 décrit une solution comparable à celle définie précédemment, en ce sens que la couche superficielle solide constitue la couche interne d'un tube coextrudé avec une couche externe. Conformément au document DE 3 539 304, la couche superficielle, consistant en une graisse ou pâte lubrifiante, mais adhérente, est rapportée et demeure du côté intérieur du tube.The document EP 0 326 711 describes a solution comparable to that defined above, in the sense that the solid surface layer constitutes the internal layer of a tube coextruded with an external layer. According to document DE 3,539,304, the surface layer, consisting of a lubricating grease or paste, but adherent, is added and remains on the inside of the tube.
Cette pâte ou graisse lubrifiante consiste elle-même en un mélange d'un lubrifiant liquide et de particules d'un lubrifiant solide.This lubricating paste or grease itself consists of a mixture of a liquid lubricant and particles of a solid lubricant.
La présente invention a pour objet un produit tubulaire allongé, avec une lubrification quasiment sèche, permanente, de la ou des surfaces de frottement du tube solide, diminuant de manière significative les frottements, y compris par rapport aux solutions précédemment identifiées et discutées.The present invention relates to an elongated tubular product, with an almost dry, permanent lubrication, of the friction surface (s) of the solid tube, significantly reducing friction, including compared to the solutions previously identified and discussed.
Selon l'invention, on a découvert une action synergique à cet effet entre : - d'une part, des particules d'un lubrifiant de nature solide, distribuées dans la matrice plastique de la couche superficielle, et affleurant au moins pour partie au niveau de la surface libre de cette dernière, et d'autre part, un lubrifiant de nature liquide, compatible avec la matrice plastique, dispersé dans la couche superficielle, pratiquement sans mouiller la surface libre de cette dernière.According to the invention, a synergistic action has been discovered for this purpose between: - on the one hand, particles of a lubricant of a solid nature, distributed in the plastic matrix of the surface layer, and at least partly flush with the free surface thereof, and on the other hand, a lubricant of a liquid nature, compatible with the plastic matrix, dispersed in the surface layer, practically without wetting the free surface of the latter.
L'effet synergique observé peut s'expliquer par le fait que les particules affleurantes du lubrifiant solide sont en quelque sorte lubrifiées à leur tour par le lubrifiant liquide les mouillant.The observed synergistic effect can be explained by the fact that the outcropping particles of the solid lubricant are in a way lubricated in turn by the liquid lubricant wetting them.
Grâce à la présente invention, un conduit d'installation devient en quelque sorte universel, en ce sens qu'il est compatible, sans autre modification, avec toutes les techniques actuelles d'installation, qu'il s'agisse des techniques de tirage, par exemple avec une câblette, ou des techniques de soufflage, par exemple avec un furet, ou par soufflage-poussage.Thanks to the present invention, an installation conduit becomes in a way universal, in the sense that it is compatible, without further modification, with all current installation techniques, whether it is drafting techniques, for example with a cable, or blowing techniques, for example with a ferret, or by blowing-pushing.
Par ailleurs, lorsque le lubrifiant solide est conducteur de l'électricité, le système lubrifiant selon l'invention permet d'éliminer, au moins pour partie, les charges statiques générées par le frottement entre le conduit et le câble, lors de l'installation de ce dernier.Furthermore, when the solid lubricant is electrically conductive, the lubricant system according to the invention makes it possible to eliminate, at least in part, the static charges generated by the friction between the conduit and the cable, during installation. of the last.
La présente invention présente encore les caractéristiques secondaires suivantes : - le lubrifiant solide a une structure lamellaire, et est par exemple du graphite, ou a encore une structure polymérique à longues chaînes droites orientées, et est par exemple un polytétrafluoréthylène,The present invention also has the following secondary characteristics: the solid lubricant has a lamellar structure, and is for example graphite, or also has a polymer structure with long, straight, oriented chains, and is for example a polytetrafluoroethylene,
- les particules du lubrifiant solide sont des micro-billes ayant un diamètre au plus égal à 20 μm, et de préférence compris entre 1 et 15 μm,the particles of the solid lubricant are micro-beads having a diameter at most equal to 20 μm, and preferably between 1 and 15 μm,
- le lubrifiant liquide est préférentiellement mais non exclusivement un silicone ; il a une viscosité au plus égale à 1 000 centisto es, à température ambiante, et par exemple comprise entre 10 et 1 000 centistokes ; l'épaisseur du film de lubrifiant liquide sur la surface libre de la couche superficielle n'excède pas 1 μm,- The liquid lubricant is preferably but not exclusively a silicone; it has a viscosity at most equal to 1000 centisto es, at room temperature, and for example between 10 and 1000 centistokes; the thickness of the liquid lubricant film on the free surface of the surface layer does not exceed 1 μm,
- le lubrifiant solide constitue une charge, la couche superficielle est irrégulière en suivant le pourtour du tube solide, et correspond par exemple à des nervures ou rainures longitudinales ; mais cette même couche superficielle peut être continue, en suivant le pourtour du tube solide.- The solid lubricant constitutes a filler, the surface layer is irregular along the periphery of the solid tube, and corresponds for example to longitudinal ribs or grooves; but this same surface layer can be continuous, following the periphery of the solid tube.
Préférentiellement, c'est le tube solide qui est constitué par la seule matrice plastique, dans laquelle, d'une part sont distribuées des particules du lubrifiant sec, affleurant pour partie au niveau d'au moins une surface libre, intérieure ou extérieure, et constituant une surface de frottement à sec, et d'autre part est diffusé un lubrifiant liquide, pratiquement sans mouiller, ni la surface extérieure, ni la surface intérieure de cette même matrice.Preferably, it is the solid tube which is constituted by the single plastic matrix, in which, on the one hand, particles of the dry lubricant are distributed, partially flush with at least one free surface, interior or exterior, and constituting a dry friction surface, and on the other hand a liquid lubricant is diffused, practically without wetting, neither the outer surface nor the inner surface of this same matrix.
Selon cette solution préférée, le lubrifiant solide constitue une charge, dont la proportion pondérale est au moins égale à 5 % de la matrice plastique, notamment comprise entre 5 % en poids et 20 % en poids de cette même matrice.According to this preferred solution, the solid lubricant constitutes a filler, the weight proportion of which is at least equal to 5% of the plastic matrix, in particular between 5% by weight and 20% by weight of this same matrix.
Toujours selon cette même solution préférée, la matrice comporte, à l'état diffusé, un lubrifiant liquide, qui constitue en quelque sorte un additif, sa proportion étant au moins égale à 0,02 % en poids de la matrice plastique, et notamment comprise entre 0,02 % en poids et 0,08 % en poids de cette même matrice. Dans ce cas, à titre d'exemple, la proportion lubrifiant solide/lubrifiant liquide est au moins égale à 5 % et est notamment comprise entre 5 % et 20 %.Still according to this same preferred solution, the matrix comprises, in the diffused state, a liquid lubricant, which constitutes a sort of additive, its proportion being at least equal to 0.02% by weight of the plastic matrix, and in particular included between 0.02% by weight and 0.08% by weight of this same matrix. In this case, by way of example, the proportion of solid lubricant / liquid lubricant is at least equal to 5% and is in particular between 5% and 20%.
La présente invention est maintenant décrite par référence au dessin annexé, dans lequel :The present invention is now described with reference to the accompanying drawing, in which:
- la figure 1 représente de manière schématique, en coupe axiale un conduit d'installation conforme à- Figure 1 shows schematically, in axial section an installation conduit according to
1' invention, - la figure 2 représente en coupe axiale une gaine de protection de câble conforme à l'invention,The invention, FIG. 2 shows in axial section a cable protection sheath according to the invention,
- la figure 3 représente en coupe transversale une gaine d'installation conforme à l'invention, mais selon un autre mode d'exécution de cette dernière,FIG. 3 represents in cross section an installation sheath according to the invention, but according to another embodiment of the latter,
Conformément à la figure 1, un conduit d'installation est constitué par un tube solide ou rigide 1, en matière plastique chargée (par exemple polyéthylène haute densité) , à la fois suffisamment souple pour être lui-même enroulé et déroulé, et suffisamment rigide pour résister lui-même à un effort radial centripète ou centrifuge. Ce tube solide comporte une surface de frottement à sec, correspondant à sa surface intérieure.In accordance with FIG. 1, an installation duct is constituted by a solid or rigid tube 1, made of charged plastic material (for example high density polyethylene), both sufficiently flexible to be itself wound and unwound, and sufficiently rigid to withstand itself a centripetal or centrifugal radial force. This solid tube has a dry friction surface, corresponding to its interior surface.
Conformément à la présente invention, dans le tube solide 1, est formée une couche superficielle 3 au moins, dont la surface libre constitue la surface de frottement à sec (surface intérieure 2) . Cette couche superficielle comporte une matrice plastique, correspondant à celle du tube solide, dans laquelle sont distribuées des particules 4 (micro-billes) d'un lubrifiant solide, affleurant pour partie au niveau de la surface libre 2.In accordance with the present invention, in the solid tube 1, a surface layer 3 at least is formed, the free surface of which constitutes the dry friction surface (internal surface 2). This surface layer comprises a plastic matrix, corresponding to that of the solid tube, in which particles 4 (micro-balls) of a solid lubricant are distributed, partly flush with the free surface 2.
Selon un autre mode d'exécution d'un conduit d'installation conforme à l'invention, représenté en figure 3, ce dernier comprend trois couches 6, 7 et 8 concentriques, constituées éventuellement par des matières plastiques respectivement différentes, l'une extérieure 7, l'autre intérieure 6, dans laquelle est intégrée la couche superficielle 3, et l'autre médiane ou intermédiaire 8. La couche superficielle 3 est discontinue, en suivant le pourtour du tube solide 1, et comprend par exemple, des nervures 9 ou adjacentes correspondantes, longitudinales.According to another embodiment of an installation duct according to the invention, represented in FIG. 3, the latter comprises three concentric layers 6, 7 and 8, optionally constituted by respectively different plastics, one exterior 7, the other inner 6, in which the surface layer 3 is integrated, and the other median or intermediate 8. The surface layer 3 is discontinuous, following the periphery of the solid tube 1, and includes, for example, ribs 9 or adjacent, longitudinal.
Mais bien entendu, cette même couche superficielle 3 peut être continue, en suivant le pourtour du tube solide 1. Comme le montre la figure 4, la couche superficielle 3 est obtenue en projetant ou diffusant à l'intérieur du tube 1, après extrusion mais en phase visco-élastique, le lubrifiant solide, sous forme particulaire, mélangé au lubrifiant liquide.But of course, this same surface layer 3 can be continuous, following the periphery of the solid tube 1. As shown in FIG. 4, the surface layer 3 is obtained by projecting or diffusing at inside the tube 1, after extrusion but in the visco-elastic phase, the solid lubricant, in particulate form, mixed with the liquid lubricant.
De cette manière, le lubrifiant solide et le lubrifiant liquide, s'incorporent dans la matrice plastique du tube, au moins en surface.In this way, the solid lubricant and the liquid lubricant are incorporated into the plastic matrix of the tube, at least on the surface.
EXEMPLE 1 :EXAMPLE 1:
Un tube en polyéthylène haute densité (PEHD) , (référence commerciale DAPLEN 4610 de la Société FrançaiseA high density polyethylene (HDPE) tube, (commercial reference DAPLEN 4610 from the French Company
PCD) , ayant un diamètre intérieur de 27 mm et une épaisseur de 3 mm, est extrudé sur une machine CMS60 de laPCD), having an inner diameter of 27 mm and a thickness of 3 mm, is extruded on a CMS60 machine of the
Société CINCINATTI.CINCINATTI company.
A la sortie de la tête d' extrusion, une suspension d'une poudre de polytetrafluorethylene (PTFE) (référence commerciale UNILUB T3 de la Société UNIFLON) ayant une granulométrie moyenne de 16μm, dans une huile de silicone (référence commerciale 47V100 de la Société PENN HITE) ayant une viscosité de 100 censtistokes, est projetée sous forme divisée à l'intérieur du tube extrudé, alors qu'il est encore viscoélastique. La poudre de PTFE représente 20 % en poids (PTFE) par rapport à l'huile.At the outlet of the extrusion head, a suspension of a polytetrafluorethylene (PTFE) powder (commercial reference UNILUB T3 of the Company UNIFLON) having an average particle size of 16 μm, in a silicone oil (commercial reference 47V100 of the Company PENN HITE) having a viscosity of 100 censtistokes, is projected in divided form inside the extruded tube, while it is still viscoelastic. PTFE powder represents 20% by weight (PTFE) relative to the oil.
Le coefficient de frottement entre la surface interne d'un tel tube, par rapport à une gaine en PEHD (même référence commerciale que précédemment) est de 0,075.The coefficient of friction between the internal surface of such a tube, compared to a HDPE sheath (same commercial reference as above) is 0.075.
Toutes choses égales par ailleurs, la poudre de PTFE et l'huile de silicone interviennent en action synergique pour diminuer le coefficient de frottement, car : le coefficient de frottement obtenu, sans traitement de la surface interne du tube est de 0,19, le coefficient de frottement obtenu, avec projection de l'huile de silicone seule est de 0,102. EXEMPLE 2 :All other things being equal, the PTFE powder and the silicone oil act in synergistic action to reduce the coefficient of friction, because: the coefficient of friction obtained, without treatment of the internal surface of the tube is 0.19, the coefficient of friction obtained, with projection of the silicone oil alone is 0.102. EXAMPLE 2:
Dans un conduit d'installation de 2 400 m, en polyéthylène haute densité (PEHD) , ayant un diamètre intérieur de 26 mm et une épaisseur de 2,2 mm, on pousse par soufflage, avec un furet, un câble de 8 mm. dans le premier cas, la surface intérieure du conduit d'installation est revêtue avec le lubrifiant liquide (huile de silicone), identifié à l'exemple 1. Dans le second cas, la surface intérieure est revêtue avec une poudre de lubrifiant solide, identique à celle de 1 ' exemple 1.In an installation duct of 2,400 m, made of high density polyethylene (HDPE), having an internal diameter of 26 mm and a thickness of 2.2 mm, an 8 mm cable is pushed by blowing, with a ferret. in the first case, the interior surface of the installation duct is coated with the liquid lubricant (silicone oil), identified in Example 1. In the second case, the interior surface is coated with a solid, identical lubricant powder to that of Example 1.
Dans le premier cas, on ne peut installer une longueur de tube excédant 400 m, alors que dans le second cas, on a pu installer des longueurs de tube allant jusqu'à 700 m, toutes choses égales par ailleurs. EXEMPLE 3 :In the first case, one cannot install a length of tube exceeding 400 m, while in the second case, one could install lengths of tube going up to 700 m, all other things being equal. EXAMPLE 3:
On utilise un conduit d'installation, en polyéthylène haute densité, de diamètre intérieur de 27 mm, et une épaisseur de 3 mm, pour un câble installé de diamètre extérieur de 17,6 mm, avec un revêtement de la surface intérieure du conduit, premièrement avec une huile de silicone ayant une viscosité de lOOCp, deuxièmement avec une poudre de Téflon ® de 10 μm de granulométrie, et troisièmement avec un mélange de poudre dans l'huile précitée, à hauteur de 10 % en poids de la poudre par rapport à l'huile.An installation conduit, made of high density polyethylene, with an internal diameter of 27 mm and a thickness of 3 mm, is used for an installed cable with an external diameter of 17.6 mm, with a coating of the internal surface of the conduit, firstly with a silicone oil having a viscosity of lOOCp, secondly with a Teflon® powder of 10 μm particle size, and thirdly with a mixture of powder in the abovementioned oil, up to 10% by weight of the powder relative to in oil.
Dans les trois cas, les coefficients de frottement mesurés, lors du poussage/portage du câble, sont respectivement de 0,102 ; 0,071 et 0,0061.In all three cases, the friction coefficients measured, when pushing / carrying the cable, are respectively 0.102; 0.071 and 0.0061.
Exemple 4 :Example 4:
On utilise un conduit d'installation en polyéthylène haute densité, ayant un diamètre intérieur deWe use a high density polyethylene installation pipe, with an inside diameter of
27 mm, et une épaisseur de 3 mm, pour un câble installé de diamètre extérieur de 17,6 mm, avec un revêtement de la surface intérieure du conduit, avec un mélange lubrifiant comportant un lubrifiant liquide (silicone) ayant une viscosité de 100 Cp, et une proportion pondérale croissante d'un lubrifiant solide (poudre de Téflon ® ayant la même granulométrie que précédemment, à savoir respectivement de 5, 10, 15 et 20 % en poids.27 mm, and a thickness of 3 mm, for an installed cable with an external diameter of 17.6 mm, with a coating of the internal surface of the conduit, with a lubricant mixture comprising a liquid lubricant (silicone) having a viscosity of 100 Cp, and an increasing proportion by weight of a solid lubricant (Teflon® powder having the same particle size as previously, namely 5, 10, 15 and 20% by weight respectively .
Dans les quatre cas précédents, les coefficients de frottement mesurés lors du soufflage/portage du câble sont respectivement de 0,086 ; 0,085 ; 0,089 ; 0,090. In the four preceding cases, the coefficients of friction measured during the blowing / carrying of the cable are respectively 0.086; 0.085; 0.089; 0.090.

Claims

REVENDICATIONS
1) Produit tubulaire allongé, présentant la même section selon toute sa direction longitudinale, comprenant un tube solide (1) constitué par au moins une matière plastique, à la fois suffisamment souple pour être lui-même enroulé et déroulé, et suffisamment rigide pour résister lui-même à un effort radial centripète ou centrifuge, ledit tube solide comportant, du côté intérieur et/ou du côté extérieur, une couche superficielle (3) dont la surface libre constitue une surface de frottement et comportant une matrice plastique dans laquelle est distribué un lubrifiant, caractérisé en ce que, de manière synergique, d'une part des particules (4) d'un lubrifiant de nature solide sont distribuées dans la matrice plastique, en affleurant au moins pour partie au niveau de la surface libre de la couche superficielle, et d'autre part un lubrifiant de nature liquide, compatible avec la matrice plastique, est dispersé dans la couche superficielle, pratiquement sans mouiller la surface libre de cette dernière.1) Elongated tubular product, having the same section along its entire longitudinal direction, comprising a solid tube (1) consisting of at least one plastic, both flexible enough to be itself wound and unrolled, and rigid enough to resist itself at a centripetal or centrifugal radial force, said solid tube comprising, on the inside and / or on the outside, a surface layer (3) whose free surface constitutes a friction surface and comprising a plastic matrix in which is distributed a lubricant, characterized in that, on the one hand, particles (4) of a lubricant of a solid nature are distributed in the plastic matrix, at least partially flush with the free surface of the layer surface, and on the other hand a liquid lubricant, compatible with the plastic matrix, is dispersed in the surface layer, practically without wetting r the free surface of the latter.
2) Produit tubulaire selon la revendication 1, caractérisé en ce que le lubrifiant liquide est un silicone.2) Tubular product according to claim 1, characterized in that the liquid lubricant is a silicone.
3) Produit tubulaire selon la revendication 1, caractérisé en ce que le lubrifiant liquide a une viscosité au plus égale à 1 000 centistokes, à température ambiante, et par exemple comprise entre 10 et 1 000 centistokes.3) Tubular product according to claim 1, characterized in that the liquid lubricant has a viscosity at most equal to 1000 centistokes, at room temperature, and for example between 10 and 1000 centistokes.
4) Produit tubulaire selon la revendication 1, caractérisé en ce que les particules (4) du lubrifiant solide sont des micro-billes ayant un diamètre au plus égal à 20 μm, et de préférence compris entre 1 et 15 μm.4) Tubular product according to claim 1, characterized in that the particles (4) of the solid lubricant are micro-beads having a diameter at most equal to 20 μm, and preferably between 1 and 15 μm.
5) Produit tubulaire selon la revendication 1, caractérisé en ce que le tube solide (1) est constitué par la seule matrice plastique, dans laquelle sont distribuées des particules (4) du lubrifiant sec, affleurant pour partie au niveau d'au moins une surface libre (2), intérieure ou extérieure, constituant une surface de frottement à sec.5) Tubular product according to claim 1, characterized in that the solid tube (1) consists of the single plastic matrix, in which are distributed particles (4) of the dry lubricant, flush for part at the level of at least one free surface (2), interior or exterior, constituting a dry friction surface.
6) Produit tubulaire selon la revendication 5, caractérisé en ce que le lubrifiant solide constitue une charge, dont la proportion est au moins égale à 5 % en poids, et comprise entre 5 et 20 % en poids de ladite matrice.6) Tubular product according to claim 5, characterized in that the solid lubricant constitutes a filler, the proportion of which is at least equal to 5% by weight, and between 5 and 20% by weight of said matrix.
7) Produit tubulaire selon la revendication 5, caractérisé en ce que le lubrifiant liquide est pour l'essentiel à l'état liquide et diffusé dans la matière plastique, pratiquement sans mouiller ni la surface extérieure, ni la surface intérieure de ladite matrice.7) Tubular product according to claim 5, characterized in that the liquid lubricant is essentially in the liquid state and diffused in the plastic, practically without wetting either the outer surface or the inner surface of said matrix.
8) Produit tubulaire selon la revendication 7, caractérisé en ce que le lubrifiant liquide constitue un additif, dont la proportion est au moins égale à 0,02 % en poids de la matrice plastique, et notamment comprise entre 0,02 % et 0,08 % en poids de ladite matrice.8) Tubular product according to claim 7, characterized in that the liquid lubricant constitutes an additive, the proportion of which is at least equal to 0.02% by weight of the plastic matrix, and in particular between 0.02% and 0, 08% by weight of said matrix.
9) Produit tubulaire selon la revendication 8, caractérisé en ce que la proportion lubrifiant solide / lubrifiant liquide est au plus égale à 5 %. 9) Tubular product according to claim 8, characterized in that the proportion of solid lubricant / liquid lubricant is at most equal to 5%.
PCT/FR1998/000519 1997-03-14 1998-03-13 Elongated tubular product, such as in particular an installation conduit WO1998042052A1 (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
BR9806324-3A BR9806324A (en) 1997-03-14 1998-03-13 Elongated tubular product
UA99105579A UA57069C2 (en) 1997-03-14 1998-03-13 Extended tubular member, specifically a support pipe
EEP199900407A EE9900407A (en) 1997-03-14 1998-03-13 Elongated tubular detail, especially installation tube type detail
SK1214-99A SK283429B6 (en) 1997-03-14 1998-03-13 Elongated tubular product, such as in particular an installation conduct
AU69234/98A AU741152B2 (en) 1997-03-14 1998-03-13 Elongated tubular product, such as in particular an installation conduit
GB9919234A GB2337367B (en) 1997-03-14 1998-03-13 Elongated tubular product, especially of the installation duct type
NZ337348A NZ337348A (en) 1997-03-14 1998-03-13 Elongated tubular product, in particular an installation conduit
DE19882152T DE19882152T1 (en) 1997-03-14 1998-03-13 Elongated tubular product, in particular in the manner of an installation duct
SI9820024A SI20133A (en) 1997-03-14 1998-03-13 Elongated tubular product, such as in particular an installation conduit
RO99-00973A RO120440B1 (en) 1997-03-14 1998-03-13 Elongate tubular product
JP54019698A JP2001521604A (en) 1997-03-14 1998-03-13 Extended tubular products, especially equipment conduits
LVP-99-130A LV12425B (en) 1997-03-14 1999-09-14 Elongated tubular product, such as in particular an installation conduit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9703372A FR2760814B1 (en) 1997-03-14 1997-03-14 EXTENDED TUBULAR PRODUCT, ESPECIALLY OF THE TYPE OF INSTALLATION DUCT
FR97/03372 1997-03-14

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FR2816388A1 (en) 2000-11-07 2002-05-10 Novoplastic Sa Electrical cable installation duct, having flexible plastic tubing having free friction surface plastic matrix distributed lubricating particulate having composite carbon black friction coefficient below 0.1
DE20201588U1 (en) * 2002-02-02 2003-03-13 CCS Technology, Inc., Wilmington, Del. Optical cable for insertion into pipe, has abrasion elements such as longitudinal knife-like members on surface of cable
FR2857461A1 (en) * 2003-07-08 2005-01-14 Acome Soc Coop Production Material with a low friction coefficient made from a solid polymer and a solid lubricating compound, for elongated tubular products such as optical cables and their installation conduits
US10435777B2 (en) 2014-02-18 2019-10-08 Sofsera Corporation Inner surface-modified tube, inner surface-modified tube manufacturing method, and inner surface-modified tube manufacturing device

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FR2795879B1 (en) * 1999-06-29 2001-10-12 Usinage Tubes Pour Electr ANNELE CONDUIT IN PRE-LUBRICATED SYNTHETIC MATERIAL, AND METHOD AND INSTALLATION FOR MAKING SAME
JP2002028984A (en) * 2000-07-13 2002-01-29 Tokai Rubber Ind Ltd Method for producing fuel transporting hose
DE102005039482A1 (en) 2005-08-18 2007-02-22 CCS Technology, Inc., Wilmington Optical transmission element and method for producing an optical transmission element
DE202010017052U1 (en) * 2010-12-24 2012-04-03 Rehau Ag + Co. Pipe or pipe fitting
RU2462801C1 (en) * 2011-05-18 2012-09-27 Государственное образовательное учреждение высшего профессионального образования "Поволжский государственный университет телекоммуникаций и информатики" (ГОУВПО ПГУТИ) Method of protecting optical cable from freezing water in protective polymer pipe and backup thereof in case of damage
KR101504692B1 (en) * 2014-08-29 2015-03-20 유옥수 The method of reducing the coefficient of friction for the inner cladding
KR101508656B1 (en) * 2014-08-29 2015-04-07 유옥수 The method of reducing the coefficient of friction for the inner cladding
WO2018130254A1 (en) * 2017-01-13 2018-07-19 National Oilwell Varco Denmark I/S An unbonded flexible pipe
CN118098688B (en) * 2024-04-28 2024-06-28 四川新东方电缆集团有限公司 Anti-bending aluminum alloy cable

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FR2816388A1 (en) 2000-11-07 2002-05-10 Novoplastic Sa Electrical cable installation duct, having flexible plastic tubing having free friction surface plastic matrix distributed lubricating particulate having composite carbon black friction coefficient below 0.1
WO2002039560A1 (en) * 2000-11-07 2002-05-16 Novoplastic Elongated tubular product, such as in particular an installation duct
DE20201588U1 (en) * 2002-02-02 2003-03-13 CCS Technology, Inc., Wilmington, Del. Optical cable for insertion into pipe, has abrasion elements such as longitudinal knife-like members on surface of cable
FR2857461A1 (en) * 2003-07-08 2005-01-14 Acome Soc Coop Production Material with a low friction coefficient made from a solid polymer and a solid lubricating compound, for elongated tubular products such as optical cables and their installation conduits
US10435777B2 (en) 2014-02-18 2019-10-08 Sofsera Corporation Inner surface-modified tube, inner surface-modified tube manufacturing method, and inner surface-modified tube manufacturing device

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SI20133A (en) 2000-06-30
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CZ251099A3 (en) 1999-10-13
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RU2189098C2 (en) 2002-09-10
ES2154612A1 (en) 2001-04-01
KR20000076210A (en) 2000-12-26
AU741152B2 (en) 2001-11-22
DE19882152T1 (en) 2000-04-27
LV12425B (en) 2000-04-20
SK283429B6 (en) 2003-07-01
FR2760814B1 (en) 1999-04-23
LT4659B (en) 2000-05-25
HUP0002341A2 (en) 2000-11-28
LV12425A (en) 2000-01-20
PL334903A1 (en) 2000-03-27
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TR199902238T2 (en) 1999-12-21
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EE9900407A (en) 2000-04-17
JP2001521604A (en) 2001-11-06
LT99111A (en) 2000-01-25
RO120440B1 (en) 2006-01-30
GB2337367A (en) 1999-11-17
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CH693801A5 (en) 2004-02-13
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GB9919234D0 (en) 1999-10-20
UA57069C2 (en) 2003-06-16

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