WO1992015817A1 - Tubular sheath adapted to the internal lining of tubular conduits - Google Patents

Tubular sheath adapted to the internal lining of tubular conduits Download PDF

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Publication number
WO1992015817A1
WO1992015817A1 PCT/BE1992/000006 BE9200006W WO9215817A1 WO 1992015817 A1 WO1992015817 A1 WO 1992015817A1 BE 9200006 W BE9200006 W BE 9200006W WO 9215817 A1 WO9215817 A1 WO 9215817A1
Authority
WO
WIPO (PCT)
Prior art keywords
carcass
tubular sheath
sheath according
layer
sheath
Prior art date
Application number
PCT/BE1992/000006
Other languages
French (fr)
Inventor
Robert Capelle
Original Assignee
Robert Capelle
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 Robert Capelle filed Critical Robert Capelle
Publication of WO1992015817A1 publication Critical patent/WO1992015817A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a general shape other than plane
    • B32B1/08—Tubular products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/36—Bending and joining, e.g. for making hollow articles
    • B29C53/38—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges
    • B29C53/48—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges for articles of indefinite length, i.e. bending a strip progressively
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5042—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like covering both elements to be joined
    • B29C65/505—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like covering both elements to be joined and placed in a recess formed in the parts to be joined, e.g. in order to obtain a continuous surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/14—Particular design of joint configurations particular design of the joint cross-sections the joint having the same thickness as the thickness of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/49—Internally supporting the, e.g. tubular, article during joining
    • B29C66/496—Internally supporting the, e.g. tubular, article during joining using a support which remains in the joined object
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/729—Textile or other fibrous material made from plastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7394—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoset
    • B29C66/73941—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoset characterised by the materials of both parts being thermosets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • 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
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
    • F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
    • F16L55/1656—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section materials for flexible liners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/483—Reactive adhesives, e.g. chemically curing adhesives
    • B29C65/4835—Heat curing adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5007—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/005—Hoses, i.e. flexible
    • B29L2023/006—Flexible liners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2597/00—Tubular articles, e.g. hoses, pipes

Definitions

  • Tubular sheath adapted to the interior lining of the tuoulaire pipes.
  • the present invention relates to a flexible tubular sheath particularly suitable for lining the interior of tubular conduits by the reversion process.
  • the known reversion method makes it possible to ensure the penetration of a sealed sheath into the pipe by gradually turning it back from a fixing point located at the entrance to the pipe.
  • the advantage of the reversion process lies in the possibility, that it gives, of advancing the sheath and consequently of lining the pipe internally without dismantling it and of making this lining over any length thanks to the assembly of sheath sections, each section can reach a length of 500 m and even more.
  • Operation with the reversion process includes, depending on the operators, different types of sheaths. These differ mainly in the design and construction of the carcass but have generally in common the presence of a coating constituted oar a thin layer of plastics material, whose your primary function is to ensure sealing. A thin coating of this kind, commonly referred to as a coating, can also constitute a protective coating but within the limits obviously more limited than a thicker coating.
  • Patent EP-A-0 205 621 discloses a sheath intended for the reversion process for the rehabilitation of deteriorated pipes. This construction is characterized by the assembly of two sheaths which, before turning over, are presented as follows:
  • a first sheath provided with a sealing coating, generally extruded and the thickness of which can vary between 0.6 mm and 1.5 mm.
  • the tubular shape of the outer sheath results from the weaving of threads in the circular loom.
  • a second sheath made of feverish materials or a non-woven fabric (non-woven).
  • the tuoular shape can result from a stitching of the Longitudinal edges, as shown in Figure 3 of the orevet.
  • This inner sheath whose diameter is greater than the previous one, is slightly folded inside the first as shown in Figure 1 in the patent.
  • this layer is perforated with regularly distributed holes in order to favor your penetration of resin up to the outer sheath, which will eventually be inside the pipe.
  • the dimensions of the holes and their distribution are specified in this patent.
  • the orevet concerning this type of sheath claims a high mechanical resistance, so as to maintain a sufficient resistance during accidents on the ground, even those coming from earthquakes.
  • Another patent DE-A-3 614 963 presents a sheath intended for the rehapilitation of used pipes in the context of water, gas or sewer pipes. According to this patent, the tubular shape is oomur by the junction of the longitudinal edges of a flat sheet.
  • This layer consists of a layer of synthetic fibrous materials covered by a layer of plastic material in order to ensure the tightness of the sheath.
  • Concerning this sealing layer the patent cites as an e x e m p l e P.V.C. or polyurethane, does not mention other materials and does not attribute any other function to this layer.
  • the terms elastomer or rubber are not mentioned.
  • the two-component structure can be completed by the insertion of a tissue embedded in the fibrous mass and which has no other function than to reinforce the fibrous layer.
  • the composition of this textile reinforcement, embedded in the fibrous mass, is not detailed. According to the description, this structure does not correspond to a composite material.
  • the joining of the longitudinal edges is achieved by polymerization of the edges simply brought together under pressure, without carrying out a addition of materials. This joining is carried out continuously.
  • this process can be carried out provided that the melting points of the two components are identical. If it is not the case, it is necessary to strip your edges on a certain width. Then, "you have to bring them together under pressure by superimposing at the same time a strip of plastic material. According to the patent, this strip is not reinforced by the presence of a textile fabric.
  • the thermal treatment necessary for the polymerization is carried out continuously in a ventilated corridor, heated with infrared rays, without the strip being exposed to any pressure. Beyond this chamore, the moving band is subjected to a pressure exerted by a roller. Then, remaining in motion, the sheath is compressed between two rollers over its entire length.
  • the object of the invention is to provide a sheath having a strong adhesion to the wall of the pipe and a particularly effective protection against stresses, such as abrasion, corrosion and waterproofing.
  • a flexible tubular sheath according to the invention is characterized in that it is obtained by longitudinal weld of the lateral edges of a flat sheet, composed of a carcass, comprising a layer of felt secured to a resistant textile support, and a protective coating, consisting of a layer of thermosetting or thermoplastic elastomer or of thermoplastic plastic material connected to the carcass by vulcanization or polymerization.
  • Figure 1 the diagram of the known process of reversion of the flexible sheath according to the invention in a rigid duct;
  • Figures 2 and 3 a section respectively by 2-2 and by 3-3 of Figure 1 showing the sheath according to the invention closed before turning;
  • Figure 4 a section in a sheet, from which is formed a sheath according to the invention
  • Figure 5 a section in a sheath according to the invention made by joining jotenu from slit and slit edges to allow the placement by vulcanization or by polymerization of a strip of the same composition;
  • Figures 6A and 6B respectively a section and a plan view of the textile support consisting of a unidirectional fabric
  • Figures 6C and 6D respectively a couoe and a plan view of the textile support with yarns woven in cnain and weft having a structure conforming to gauze weaving or any other weaving process leaving between the warp and weft son an empty space at least equal to the diameter of the largest wire;
  • FIGS. 7A and 7B respectively a section and a plan view schematically showing a carcass constituted by a unidirectional textile support needled on a layer of felt;
  • 8A and 8B respectively a section and a plan view schematically showing a carcass constituted by a textile support with a needled gauze structure on a layer of felt;
  • Figure 9A a section in a sheath, the carcass of which, constituted respectively by a felted unidi rectional fabric or by a felted gauze weaving fabric, is covered by a protective coating, the tuoular shape having been obtained by joining the longitudinal doros of the sheet produced so as to reconstitute in the junction the composite structure of the sheet;
  • Figure 9B to 9E the detail of the realization of the joining of the longitudinal edges according to Figure 9A;
  • Figure 10 a section of a sheath according to the invention turned over and lining a rigid pipe;
  • Figure 11 a section in a sheet characterized by a thick embassy of the coating in its central part;
  • Figure 12 a section of the tablecloth representing a thickened coating in the central part, and
  • Figure 13 a section of the sheath with a thickened coating in its central part, as it is placed in a rigid pipe after turning.
  • a flexible sheath according to the invention has a tubular shape (FIG. 5) resulting from the junction of the two longitudinal edges of the ply of FIG. 4.
  • the constitution of this sheath comprises a textile carcass 5 and a covering 6, serving as a protective layer and sealing and manufactured either from thermosetting or thermoplastic elastomer or from thermoplastic plastics.
  • the textile carcass 5 is broken down into two elements: a synthetic fabric 7 and a layer of felt 8.
  • the fabric 7 can be formed (FIGS. 6A / 6B) by a unidirectional structure formed by longitudinal wires 7 ′, not assembled or assembled by transverse son 9 intervening only to ensure the stability of this structure.
  • the fabric of the carcass 5 (FIGS. 6C / 6D) can also be constituted by a gauze weaving or woven fabric according to a different process but leaving between the warp and weft yarns voids at least equal to the diameter of the largest yarn.
  • the synthetic fabric must have a determined resistance to oppose the axial elongation and the radial di lat at ion of the sheath subjected to the different turning pressures.
  • the felt 8 is needled on one side of the unidirectional fabric (FIGS. 7A / 7B) or of a gauze weaving fabric or equivalent with regard to the presence of voids between the warp and weft threads (FIGS. 8A, 8B), the other side remaining not felted to allow calendering and vulcanization or polymerization of the coating.
  • the chemical adhesion between the rubber and the textile is reinforced by a mechanical adhesion resulting from the presence of the rubber between the threads, if it is a unidirectional fabric, or in the existing voids, if it is gauze woven fabric or equivalent; - the interpenetration between the felt and the rubber through the fabric joins the three materials together to the point of forming together a composite material.
  • the felt layer performs two functions, namely:
  • the protective coating consisting of a layer of thermosetting or thermoplastic elastomer of variable thickness arranged according to the stresses, is fixed to the carcass by vulcanization or polymerization.
  • An equivalent composite structure can also be obtained from different thermoplastic plastics capable of ensuring a deep bond with the same textile support composed of a gauze or equivalent fabric and a layer of felt.
  • the weld or the longitudinal joint is carried out in the thickness of the coating layer, whatever its thermosetting or thermoplastic nature (FIG. 5).
  • the joining ( Figures 9A / 9B) to reproduce the composite structure is obtained by vulcanizing a strip 10 made of fabric gauze weaving 11 or equivalent embedded in a layer of raw rubber 12 adhering to the existing rubber and having the same aptitudes in terms of coating.
  • This strip 10 must have a width and a thickness determined to correctly fill the cavity 13 created by the juxtaposition of the two longitudinal edges 14 after their preparation, that is to say splitting and cutting of the protective coating over a determined width ( Figures 9C / 9D / 9E).
  • thermoplastic material From such a structure, that is to say with a coating of thermoplastic material, it is possible to achieve a junction by reproducing exactly the same preparation of the edges so as to be able to place in the space created by the juxtaposition of the two edges, a strip of fabric embedded in a layer of thermoplastic material of the same quality as the covering. By polymerizing, under pressure, this strip of width and determined thickness, a junction is produced which also reproduces the composite structure of the sheet having a coating of thermoplastic material. Carried out in this way, the junction fully reproduces the composite structure of the ply and therefore cannot adversely influence the reversal either because of a significant difference in flexibility or in the modulus of elasticity. There is no significant difference in thickness. tive compared to the average thickness of the tablecloth. It provides the same seal against gases and liquids conveyed in the pipe and it has mechanical resistance, which reaches at least 65% of the resistance of the sheet itself.
  • the sheath which is the subject of the present invention is formed by joining the longitudinal edges of the sheet without otherwise modifying the composition. Consequently, the description of the characteristic composition according to the invention can be applied equally to the ply or to the sheath or to the joining zone.
  • the protective coating constituted by the elastomer layer is, after the inversion, in contact with the liquids conveyed in the tube or in the rigid pipe, while the other face of the sheath constituted by the layer of felt, which has summer, before inversion, carefully impregnated with resin, spreads against and in contact with the wall of said pipe. Subsequently, by bringing the pressure and the temperature to the required conditions, the resin by polymerizing ensures a very high adhesion between the pipe and the rubberized sheath.

Abstract

The sheath is obtained by longitudinal welding of longitudinal edges of a planar sheet comprised of a carcass (5), comprising a felt layer (8) adhered to a resistant textile support (7), and a protection coating (6) comprised of a thermoplastic or heat setting elastomer layer or a thermoplastic material bound to the carcass (5) by vulcanization or polymerization. The protection coating (6), comprised of a thermoplastic or thermosetting elastomer or a thermoplastic plastic material, acts not only as a protection but also as matrix, being incorporated in the carcass (5) and forming therewith a composite material.

Description

Gaine tubulaire adaptée au garnissage inιérieur des conduites tuoulaires. Tubular sheath adapted to the interior lining of the tuoulaire pipes.
La présente invention concerne une gaine tuaulaire souple particulièrement adaptée au garnissage intérieur des conduites tubulaires par le procédé de réversion. The present invention relates to a flexible tubular sheath particularly suitable for lining the interior of tubular conduits by the reversion process.
Le procédé connu de réversion permet d'assurer la pénétration d'une gaine étanche dans la conduite en laretournant progressivement à partir d'un point de fixa¬tion situé à l'entrée de la conduite. The known reversion method makes it possible to ensure the penetration of a sealed sheath into the pipe by gradually turning it back from a fixing point located at the entrance to the pipe.
L'intérêt du procédé de réversion réside dans la possibilité, qu'il donne, de faire progresser la gaine et par conséquent de garnir intérieurement la conduite sans la démonter et de réaliser ce garnissage sur n'importe quelle longueur grâce à l'assemblage de tronçons de gaine, cnaque tronçon pouvant atteindre une longueur de 500 m et même davantage. The advantage of the reversion process lies in the possibility, that it gives, of advancing the sheath and consequently of lining the pipe internally without dismantling it and of making this lining over any length thanks to the assembly of sheath sections, each section can reach a length of 500 m and even more.
L'exploitation au procédé ae réversion comporte, suivant les exploitants, différents types de gaines. Celles-ci se différencient principalement par la conception et la construction de la carcasse mais ont généralement en commun la présence d'un revêtement constitué oar une couche mince de matière ptastique, dont ta fonction p r io r it a i r e est d'assurer l'étanchéité. Un revêtement mince de ce genre, désigné naoitueilement sous le terme de coating, peut également constituer un revêtement protecteur mais dans les limites évidemment plus restreintes qu'un r e v ê t em e n t plus épais. On connaît par le brevet EP-A-0 205 621 une gaine destinée au procédé de réversion en vue de la réhabilitation de conduites détériorées. Cette construction se caractérise par l'assemolage de deux gaines qui, avant le retournement, se présentent de la manière suivante : Operation with the reversion process includes, depending on the operators, different types of sheaths. These differ mainly in the design and construction of the carcass but have generally in common the presence of a coating constituted oar a thin layer of plastics material, whose your primary function is to ensure sealing. A thin coating of this kind, commonly referred to as a coating, can also constitute a protective coating but within the limits obviously more limited than a thicker coating. Patent EP-A-0 205 621 discloses a sheath intended for the reversion process for the rehabilitation of deteriorated pipes. This construction is characterized by the assembly of two sheaths which, before turning over, are presented as follows:
- à l'extérieur, une première gaine pourvue d'un revêtement d'étanchéité, généralement extrudé et dont l'épaisseur peut varier entre 0,6 mm et 1,5 mm. La forme tubulaire de la gaine extérieure résulte du tissage des fils au métier circulaire. - outside, a first sheath provided with a sealing coating, generally extruded and the thickness of which can vary between 0.6 mm and 1.5 mm. The tubular shape of the outer sheath results from the weaving of threads in the circular loom.
- à l'intérieur de ta première, on a placé une deuxième gaine constituée de matières fipreuses ou d'un textile non tissé (non woven). Dans ce cas, la forme tuoulaire peut résulter d'une couture des bords Longitudinaux, comme le montre la figure 3 du orevet. Cette gaine intérieure, dont le diamètre est supérieur à la précédente, est légèrement pliée à l'intérieur de la première comme le montre la figure 1 au brevet. - inside your first, we placed a second sheath made of feverish materials or a non-woven fabric (non-woven). In this case, the tuoular shape can result from a stitching of the Longitudinal edges, as shown in Figure 3 of the orevet. This inner sheath, whose diameter is greater than the previous one, is slightly folded inside the first as shown in Figure 1 in the patent.
Pour faciliter l'apsorption de la résine dans cette matrice fibreuse ou dans ce textile non tissé , cette couche est perforée de trous régulièrement répartis afin de favoriser ta pénétration de resine jusqu'à la gaine extérieure, qui va finalement se trouver a l'intérieur de la conduite. Les dimensions des trous et leur répartition sont précisées dans ce brevet. Le orevet concernant ce type de gaine revendidue une résistance mécanidue élevée, de façon à maintenir une résistance suffisante lors des accidents de terrain, même ceux provenant de tremblements de terre. Un autre brevet DE-A-3 614 963 présente une gaine destinée à la réhapilitation des tuyauteries usagées dans le cadre des conduites d'eau, de gaz ou d'égouts. Suivant ce brevet, la forme tubulaire est ootenue par le jonctionnement des oords longitudinaux d'une nappe plane. To facilitate the absorption of the resin in this fibrous matrix or in this nonwoven fabric, this layer is perforated with regularly distributed holes in order to favor your penetration of resin up to the outer sheath, which will eventually be inside the pipe. The dimensions of the holes and their distribution are specified in this patent. The orevet concerning this type of sheath claims a high mechanical resistance, so as to maintain a sufficient resistance during accidents on the ground, even those coming from earthquakes. Another patent DE-A-3 614 963 presents a sheath intended for the rehapilitation of used pipes in the context of water, gas or sewer pipes. According to this patent, the tubular shape is ootenue by the junction of the longitudinal edges of a flat sheet.
Cette nappe est constituée par une couche de matières fibreuses synthétiques recouverte par une couche de matière plastique en vue d'assurer l'étanchéité de la gaine. Concernant cette couche d'etanchéité, le brevet cite à titre d ' e x e m p l e le P.V.C. ou le polyuréthane, ne mentionne pas d'autres matières et n'attrioue pas d'autre fonction à cette couche. Les termes élastomère ou caoutchouc ne sont pas mentionnés. This layer consists of a layer of synthetic fibrous materials covered by a layer of plastic material in order to ensure the tightness of the sheath. Concerning this sealing layer, the patent cites as an e x e m p l e P.V.C. or polyurethane, does not mention other materials and does not attribute any other function to this layer. The terms elastomer or rubber are not mentioned.
La structure à deux composants peut être complétée par l'insertion d'un tissu noyé dans la masse fibreuse et qui n'a pas d'autre fonction que de renforcer la couche fibreuse. La composition de ce renforcement textile, noyé dans la masse fibreuse, n'est pas détaillée. D'après la description cette structure ne correspond pas à un matériau composite. The two-component structure can be completed by the insertion of a tissue embedded in the fibrous mass and which has no other function than to reinforce the fibrous layer. The composition of this textile reinforcement, embedded in the fibrous mass, is not detailed. According to the description, this structure does not correspond to a composite material.
Le jonctionnement des bords longitudinaux est réalisé par polymérisation des bords simplement rapprochés l'un de l'autre sous pression, sans procéder à une addition de matières. Ce jonctionnement est realisé en continu. The joining of the longitudinal edges is achieved by polymerization of the edges simply brought together under pressure, without carrying out a addition of materials. This joining is carried out continuously.
D'après Le brevet, ce procédé est réalisable à condition que les points de fusion des deux composants soient identiques. Si ce n'est pas le cas, il faut dénuder tes bords sur une certaine largeur. Ensuite, "l faut tes rapprocher sous pression en superposant en même temps à cet endroit une bande de matière plastique. D'après le brevet, cette bande n'est pas renforcée par la présence d'un oli textile. According to the patent, this process can be carried out provided that the melting points of the two components are identical. If it is not the case, it is necessary to strip your edges on a certain width. Then, "you have to bring them together under pressure by superimposing at the same time a strip of plastic material. According to the patent, this strip is not reinforced by the presence of a textile fabric.
Le traitement tnermique nécessaire à la polymérisation se réalise en continu dans un couloir ventilé, cnauffé aux rayons infrarouges, sans que la bande ne soit exposée à une pression quelconque. Au-delà de cette chamore, la bande en mouvement est soumise à une pression exercée par un rouleau. Ensuite, restant en mouvement, la gaine est comprimée entre deux rouleaux sur toute sa longueur. The thermal treatment necessary for the polymerization is carried out continuously in a ventilated corridor, heated with infrared rays, without the strip being exposed to any pressure. Beyond this chamore, the moving band is subjected to a pressure exerted by a roller. Then, remaining in motion, the sheath is compressed between two rollers over its entire length.
La jonction ainsi réalisée en continu n'a pas permis d'obtenir une soudure entre tissus et présente par conséquent à cet endroit une zone moins résistante par rapport à la structure d'origine. The junction thus produced continuously did not make it possible to obtain a weld between fabrics and consequently presents at this location an area which is less resistant compared to the original structure.
L'objet de l'invention est de réaliser une gaine présentant une forte adhérence à la paroi de la conduite et une protection particulièrement efficace vis-à-vis des sollicitations, telles que abrasion, corrosion et étancnéité. The object of the invention is to provide a sheath having a strong adhesion to the wall of the pipe and a particularly effective protection against stresses, such as abrasion, corrosion and waterproofing.
Une gaine tubulaire souple suivant l'invention est caractérisée en ce qu'elle est obtenue par soudurelongitudinale des bords latéraux d'une nappe plane, composée d'une carcasse, comoprtant une couche de feutre solidarisée a un support textile résistant, et d'un revêtement protecteur, constitué par une couche d'élastomère thermodurcissable ou thermoplastidue ou de matière plastique thermoplastique reliée à la carcasse par vulcanisation ou polymérisation. A flexible tubular sheath according to the invention is characterized in that it is obtained by longitudinal weld of the lateral edges of a flat sheet, composed of a carcass, comprising a layer of felt secured to a resistant textile support, and a protective coating, consisting of a layer of thermosetting or thermoplastic elastomer or of thermoplastic plastic material connected to the carcass by vulcanization or polymerization.
La carcasse composée d'un tissu tissage gaze lié à une couche de feutre forme avec le revêtement prorecteur un matériau composite. L'invention est décrite maintenant avec plus ce details sur la base des dessins annexés, à titre d'exemple, montrant en : The carcass composed of a gauze weaving fabric linked to a layer of felt forms with the prorective coating a composite material. The invention is now described with more details on the basis of the accompanying drawings, by way of example, showing in:
Figure 1 le schéma du procédé connu de réversion de la gaine souple suivant l'invention dans une conduiterigide ; Figures 2 et 3 une coupe respectivement par 2-2 et par 3-3 de la figure 1 montrant la gaine suivant l'invention fermée avant retournement ; Figure 1 the diagram of the known process of reversion of the flexible sheath according to the invention in a rigid duct; Figures 2 and 3 a section respectively by 2-2 and by 3-3 of Figure 1 showing the sheath according to the invention closed before turning;
Figure 4 une coupe dans une nappe, à partir oe laquelle est formée une gaine suivant l'invention ; Figure 4 a section in a sheet, from which is formed a sheath according to the invention;
Figure 5 une coupe dans une gaine suivant l'invention réalisée par jonctionnement ootenu à partir de bords réfendus et tranchés en vue de permettre le placement par vulcanisation ou par polymérisation d'une bande de la même composition ; Figure 5 a section in a sheath according to the invention made by joining jotenu from slit and slit edges to allow the placement by vulcanization or by polymerization of a strip of the same composition;
Figures 6A et 6B respectivement une coupe et une vue en plan du support textile consistant en un tissu unidirectionnel ; Figures 6C et 6D respectivement une couoe et une vue en plan du support textile avec des fils tissés en cnaîne et en trame possédant une structure conforme au tissage gaze ou à tout autre procédé oe tissage laissant entre les fils de chaîne et de trame un espace vide au moins égal au diamètre du fil le PLUS gros; Figures 6A and 6B respectively a section and a plan view of the textile support consisting of a unidirectional fabric; Figures 6C and 6D respectively a couoe and a plan view of the textile support with yarns woven in cnain and weft having a structure conforming to gauze weaving or any other weaving process leaving between the warp and weft son an empty space at least equal to the diameter of the largest wire;
Figures 7A et 7B respectivement une coupe et une vue en plan représentant schématiquement une carcasse constituée par un support textile unidirectionnel aiguilleté sur une couche de feutre ; FIGS. 7A and 7B respectively a section and a plan view schematically showing a carcass constituted by a unidirectional textile support needled on a layer of felt;
Figures 8A et 8B respectivement une coupe et une vue en plan représentant schématiquement une carcasse constituée par un support textile à structure gaze aiguilleté sur une couche de feutre ; 8A and 8B respectively a section and a plan view schematically showing a carcass constituted by a textile support with a needled gauze structure on a layer of felt;
Figure 9A une coupe dans une gaine, dont la carcasse, constituée respectivement par un tissu unidi rectionnel feutré ou par un tissu tissage gaze feutré, est recouverte par un revêtement protecteur, la forme tuoulaire ayant été obtenue par jonctionnement des doros longitudinaux de la nappe réalisé de façon a reconstituer dans la jonction la structure composite de la nappe ; Figure 9A a section in a sheath, the carcass of which, constituted respectively by a felted unidi rectional fabric or by a felted gauze weaving fabric, is covered by a protective coating, the tuoular shape having been obtained by joining the longitudinal doros of the sheet produced so as to reconstitute in the junction the composite structure of the sheet;
Figure 9B à 9E le détail de la réalisation du jonctionnement des bords longitudinaux suivant la figure 9A; Figure 10 une coupe d'une gaine suivant l'invention retournée et garnissant une conduite rigide ; Figure 9B to 9E the detail of the realization of the joining of the longitudinal edges according to Figure 9A; Figure 10 a section of a sheath according to the invention turned over and lining a rigid pipe;
Figure 11 une coupe dans une nappe caractérisée par un épaiss issement du revêtement dans sa partie centrale ; Figure 12 une coupe de la nappe représentant un revêtement épaissi dans la partie centrale, et Figure 11 a section in a sheet characterized by a thick issement of the coating in its central part; Figure 12 a section of the tablecloth representing a thickened coating in the central part, and
Figure 13 une coupe de la gaine avec un revêtement épaissi dans sa partie centrale, telle qu'elle se trouve placée dans une conduite rigide après retournement. Figure 13 a section of the sheath with a thickened coating in its central part, as it is placed in a rigid pipe after turning.
Dans le schéma du procédé connu de réversion, représenté en figure 1, on voit la bobine d'enroulement 1 de la gaine, la tête de retournement 2 et la pénétration de la gaine 3 dans la conduite rigide 4. En figures 2 et 3 on voit la gaine 3 fermée, telle qu'elle pénètre dans la conduite avant retournement. Une gaine souple suivant l'invention présente une forme tubulaire (figure 5) résultant du jonctionnement des deux bords longitudinaux de la nappe de figure 4. La constitution de cette gaine comporte une carcasse textile 5 et un revêtement 6, servant de couche de protection et d'étanchéité et fabriqué soit à partir d'élastomère thermodurcissable ou thermoplastique soit à partir de matières plastiques thermoplastiques. In the diagram of the known reversion process, represented in FIG. 1, we see the winding coil 1 of the sheath, the turning head 2 and the penetration of the sheath 3 in the rigid pipe 4. In FIGS. 2 and 3 we sees the sheath 3 closed, as it enters the pipe before turning. A flexible sheath according to the invention has a tubular shape (FIG. 5) resulting from the junction of the two longitudinal edges of the ply of FIG. 4. The constitution of this sheath comprises a textile carcass 5 and a covering 6, serving as a protective layer and sealing and manufactured either from thermosetting or thermoplastic elastomer or from thermoplastic plastics.
La carcasse textile 5 se décompose en deux éléments: un tissu synthétique 7 et une couche de feutre 8. Le tissu 7 peut être constitué (figures 6A/6B) par une structure unidirectionnelle formée par des fils longitudinaux 7', non assemblés ou assemblés par des fils transversaux 9 n'intervenant que pour assurer la stabilité de cette structure. Le tissu de la carcasse 5 (figures 6C/6D) peut aussi être constitué par un tissu tissage gaze ou tissé suivant un procédé différent mais laissant entre les fils de chaîne et de trame des vides au moins égaux au diamètre du fil le plus gros. Le tissu synthétique doit posséder une résistance déterminée pour s'opposer à l'allongement axial et à la d i lat at ion radiale de la gaine soumise aux différentes pressions de retournement. The textile carcass 5 is broken down into two elements: a synthetic fabric 7 and a layer of felt 8. The fabric 7 can be formed (FIGS. 6A / 6B) by a unidirectional structure formed by longitudinal wires 7 ′, not assembled or assembled by transverse son 9 intervening only to ensure the stability of this structure. The fabric of the carcass 5 (FIGS. 6C / 6D) can also be constituted by a gauze weaving or woven fabric according to a different process but leaving between the warp and weft yarns voids at least equal to the diameter of the largest yarn. The synthetic fabric must have a determined resistance to oppose the axial elongation and the radial di lat at ion of the sheath subjected to the different turning pressures.
Le feutre 8 est aiguilleté sur une des faces du tissu unidirectionnel (figures 7A/7B) ou d'un tissu tissage gaze ou équivalent en ce qui concerne la présence de vides entre les fils de chaîne et de trame (figures 8A,8B), l'autre face restant non feutrée pour permettre le calandrage et la vulcanisation ou la polymérisation du revêtement. The felt 8 is needled on one side of the unidirectional fabric (FIGS. 7A / 7B) or of a gauze weaving fabric or equivalent with regard to the presence of voids between the warp and weft threads (FIGS. 8A, 8B), the other side remaining not felted to allow calendering and vulcanization or polymerization of the coating.
Après la vulcanisation, on constate les résultats suivants : After vulcanization, the following results are observed:
l'adhérence chimique entre le caoutchouc et le textile est renforcée par une adhérence mécanique résultant de la présence du caoutchouc entre les fils, s'il s'agit d'un tissu unidirectionnel, ou dans les vides existants, s'il s'agit d'un tissu tissage gaze ou équivalent ; - l'interpénétration entre le feutre et le caoutchouc à travers le tissu solidarise les trois matières entre elles au point de former ensemble un matériau composite.  the chemical adhesion between the rubber and the textile is reinforced by a mechanical adhesion resulting from the presence of the rubber between the threads, if it is a unidirectional fabric, or in the existing voids, if it is gauze woven fabric or equivalent; - the interpenetration between the felt and the rubber through the fabric joins the three materials together to the point of forming together a composite material.
Dans la gaine suivant l'invention, la couche de feutre exerce deux fonctions, à savoir : In the sheath according to the invention, the felt layer performs two functions, namely:
- avant le retournement absorber une quantité suffisante de colle et assurer la stabilité de cette imprégnation jusqu'au moment de l'étalement de la gaine contre la paroi du tube rigide ; - influencer positivement la valeur du module d'élas ticité de la structure composite dans le sens transversal. - before turning over, absorb a sufficient quantity of glue and ensure the stability of this impregnation until the sheath is spread against the wall of the rigid tube; - positively influence the value of the elas module ticity of the composite structure in the transverse direction.
Le revêtement protecteur, constitué par une couche d'élastomère thermodurcissable ou thermoplastique d'épaisseur variable aménagée en fonction des sollicitations, est fixé sur la carcasse par vulcanisation ou polymérisation. Une structure composite équivalente peut également être obtenue à partir de différentes matières plastiques thermoplastiques capables d'assurer une liaison profonde avec le même support textile composé d'un tissu gaze ou équivalent et d'une couche de feutre. The protective coating, consisting of a layer of thermosetting or thermoplastic elastomer of variable thickness arranged according to the stresses, is fixed to the carcass by vulcanization or polymerization. An equivalent composite structure can also be obtained from different thermoplastic plastics capable of ensuring a deep bond with the same textile support composed of a gauze or equivalent fabric and a layer of felt.
Le choix d'une composition ou d'une formulation spécifique répondant aux sollicitations rencontrées s'étend à toutes les ressources provenant de la diversité des élastomères thermodurcissables ou thermoplastiques et des matières plastiques thermoplastiques. Tel mélange sera utilisé pour résister à telle sollicitation à l'abrasion, tandis qu'une formulation entièrement différente sera choisie pour résister à une corrosion spécifique ou pour assurer l'étanchéité à l'égard d'un gaz ou d'un liquide quelconque. The choice of a specific composition or formulation responding to the stresses encountered extends to all the resources coming from the diversity of thermosetting or thermoplastic elastomers and thermoplastic plastics. Such a mixture will be used to resist such abrasion stress, while an entirely different formulation will be chosen to resist specific corrosion or to ensure sealing against any gas or liquid.
Grâce à la structure de la nappe suivant l'invention, la soudure ou le j o n c t i o n n e m e n t longitudinal est réalisé dans l'épaisseur de la couche du revêtement, quelle que soit sa nature thermodurcissable ou thermoplastique (figure 5). Thanks to the structure of the sheet according to the invention, the weld or the longitudinal joint is carried out in the thickness of the coating layer, whatever its thermosetting or thermoplastic nature (FIG. 5).
Le jonctionnement (figures 9A/9B) permettant de reproduire la structure composite est obtenu par la vulcanisation d'une bande 10 constituée de tissu tissage gaze 11 ou équivalent noyé dans une couche de caoutchouc cru 12 adhérent au caoutchouc existant et ayant les mêmes aptitudes au point de vue revêtement. Cette bande 10 doit avoir une largeur et une épaisseur déterminées pour remplir correctement la cavité 13 créée par la juxtaposition des deux bords longitudinaux 14 après leur préparation, c'est-à-dire r efendage et découpe du revêtement protecteur sur une largeur déterminée (figures 9C/9D/9E). The joining (Figures 9A / 9B) to reproduce the composite structure is obtained by vulcanizing a strip 10 made of fabric gauze weaving 11 or equivalent embedded in a layer of raw rubber 12 adhering to the existing rubber and having the same aptitudes in terms of coating. This strip 10 must have a width and a thickness determined to correctly fill the cavity 13 created by the juxtaposition of the two longitudinal edges 14 after their preparation, that is to say splitting and cutting of the protective coating over a determined width (Figures 9C / 9D / 9E).
Au cours de la vulcanisation de cette bande exécutée sous pression et à chaud, on doit obtenir le remplissage complet ou le fiuage de la gomme dans l'espace disponible et une liaison intime assurant l'homogénéité des couches caoutchoutées en présence. During the vulcanization of this strip executed under pressure and hot, it is necessary to obtain the complete filling or the fogging of the rubber in the available space and an intimate connection ensuring the homogeneity of the rubberized layers present.
A partir d'une telle structure, c'est-à-dire avec un revêtement en matière thermoplastique, on peut réaliser un jonctionnement en reproduisant exactement la même préparation des bords de façon à pouvoir placer dans l'espace créé par la juxtaposition des deux bords, une bande de tissu noyé dans une couche de matière thermoplastique de la même qualité que le revêtement. En polymérisant, sous pression, cette bande de largeur et d'épaisseur déterminée, on réalise une jonction qui reproduit également la structure composite de la nappe possédant un revêtement en matière thermoplastique. Réalisée de cette façon, la jonction reproduit intégralement la structure composite de la nappe et par conséquent ne peut pas influencer défavorablement le retournement soit à cause d'une différence significative de souplesse ou du module d'élasticité. Elle ne présente pas une différence d'épaisseur significa tive par rapport à l'épaisseur moyenne de la nappe. Elle assure la même étanchéité aux gaz et aux liquides véhiculés dans la conduite et elle possède une résistance mécanique, qui atteint au moins 65 % de la résistance de la nappe elle-même. From such a structure, that is to say with a coating of thermoplastic material, it is possible to achieve a junction by reproducing exactly the same preparation of the edges so as to be able to place in the space created by the juxtaposition of the two edges, a strip of fabric embedded in a layer of thermoplastic material of the same quality as the covering. By polymerizing, under pressure, this strip of width and determined thickness, a junction is produced which also reproduces the composite structure of the sheet having a coating of thermoplastic material. Carried out in this way, the junction fully reproduces the composite structure of the ply and therefore cannot adversely influence the reversal either because of a significant difference in flexibility or in the modulus of elasticity. There is no significant difference in thickness. tive compared to the average thickness of the tablecloth. It provides the same seal against gases and liquids conveyed in the pipe and it has mechanical resistance, which reaches at least 65% of the resistance of the sheet itself.
On peut également à partir d'une préparation identique des bords longitudinaux 14 placer une bande composée d'un pli textile et de caoutchouc et solidariser cette bande par une vulcanisation à froid dans la cavité 13. It is also possible, from an identical preparation of the longitudinal edges 14, to place a strip composed of a textile ply and of rubber and to join this strip by cold vulcanization in the cavity 13.
Bien entendu, toute autre technique d'assemblage des deux bords longitudinaux de la nappe respectant la structure composite ici décrite est du domaine de la présente invention. Of course, any other technique for assembling the two longitudinal edges of the ply respecting the composite structure described here is within the scope of the present invention.
La gaine faisant l'objet de la présente invention est formée par jonctionnement des bords longitudinaux de la nappe sans en modifier autrement la composition. Par conséquent, la description de la composition caractéristique suivant l'invention peut s'appliquer indifféremment à la nappe ou à la gaine ou à la zone de jonctionnement. The sheath which is the subject of the present invention is formed by joining the longitudinal edges of the sheet without otherwise modifying the composition. Consequently, the description of the characteristic composition according to the invention can be applied equally to the ply or to the sheath or to the joining zone.
Le revêtement protecteur constitué par la couche d'élastomère se trouve, après le retournement, en contact avec les liquides véhiculés dans le tube ou dans la conduite rigide, tandis que l'autre face de la gaine constituée par la couche de feutre, qui a été, avant retournement, soigneusement imprégnée de résine, s'étale contre et en contact avec la paroi de ladite conduite. Ultérieurement, en amenant la pression et la température aux conditions requises, la résine en se polymérisant assure une adhérence très élevée entre la conduite et la gaine caoutchoutée. The protective coating constituted by the elastomer layer is, after the inversion, in contact with the liquids conveyed in the tube or in the rigid pipe, while the other face of the sheath constituted by the layer of felt, which has summer, before inversion, carefully impregnated with resin, spreads against and in contact with the wall of said pipe. Subsequently, by bringing the pressure and the temperature to the required conditions, the resin by polymerizing ensures a very high adhesion between the pipe and the rubberized sheath.
De cette façon, on a bien réalisé par une phase continue la fixation d'un revêtement protecteur fortement adhérent à la paroi et pouvant dès lors exercer, grâce à sa composition, une protection particulièrement efficace vis-à-vis des sollicitations telles que abrasion, corrosion et étanchéité. In this way, it was well achieved by a continuous phase the fixing of a protective coating strongly adherent to the wall and being able therefore to exert, thanks to its composition, a particularly effective protection against stresses such as abrasion, corrosion and sealing.

Claims

Revendications claims
1. Gaine tubulaire souple, particulièrement adaptée au garnissage intérieur des conduites rigides (4), enterrées ou reposant à la surface du sol, par le procédé de réversion, caractérisée en ce qu'elle est obtenue par soudure longitudinale des bords longitudinaux d'une nappe plane, composée d'une carcasse (5), comportant une couche de feutre (8) solidarisée à un support textile résistant (7), et d'un revêtement protecteur (6), constitué par une couche d'élastomère thermodurcissable ou thermoplastique ou de matière plastique thermoplastique reliée à la carcasse (5) par vulcanisation ou polymérisation. 1. Flexible tubular sheath, particularly suitable for lining the rigid pipes (4), buried or lying on the ground surface, by the reversion process, characterized in that it is obtained by longitudinal welding of the longitudinal edges of a flat sheet, composed of a carcass (5), comprising a felt layer (8) secured to a resistant textile support (7), and a protective coating (6), constituted by a layer of thermosetting or thermoplastic elastomer or of thermoplastic plastic material connected to the carcass (5) by vulcanization or polymerization.
2. Gaine tubulaire suivant la revendication 1, caractérisée en ce que le support textile (7) de la carcasse (5) possède, quelle que soit sa résistance mécanique, une structure résultant du tissage gaze ou équivalent et présentant des vides entre les fils de chaîne et de trame. 2. Tubular sheath according to claim 1, characterized in that the textile support (7) of the carcass (5) has, whatever its mechanical strength, a structure resulting from the weaving gauze or equivalent and having voids between the son of warp and weft.
3. Gaine tubulaire suivant la revendication 1, caractérisée en ce que la structure est constituée d'une nappe de fils unidirectionnels, de manière à être facilement traversée par la gomme sous pression de vulcanisation. 3. Tubular sheath according to claim 1, characterized in that the structure consists of a sheet of unidirectional son, so as to be easily traversed by the rubber under vulcanization pressure.
4. Gaine tubulaire suivant la revendication 2, caractérisée en ce que la structure résulte du tissage gaze ou équivalent, de manière à être facilement traversée par la gomme sous pression de vulcanisation. 4. Tubular sheath according to claim 2, characterized in that the structure results from weaving gauze or equivalent, so as to be easily traversed by the rubber under vulcanization pressure.
5. Gaine tubulaire suivant les revendications 1 et 2, caractérisée en ce que la couche de feutre (8) de la carcasse (5) est solidarisée au tissu tissage gaze ou équivalent d'un côté, l'autre côté restant non feutré ou peu feutré de façon à pouvoir être recouvert et traversé par le revêtement protecteur. 5. Tubular sheath according to claims 1 and 2, characterized in that the felt layer (8) of the carcass (5) is secured to the gauze weaving fabric or equivalent on one side, the other side remaining not felted or slightly felted so that it can be covered and traversed by the protective coating.
6. Gaine tubulaire suivant une ou plusieurs des revendications 1 à 5, caractérisée en ce que le revêtement protecteur (6), constitué par un élastomère thermodurcissable ou thermoplastique ou une matière plastique thermoplastique, intervient non seulement en tant que tel mais également comme matrice, s'incorporant dans la carcasse (5) et formant avec elle un matériau composite. 6. Tubular sheath according to one or more of claims 1 to 5, characterized in that the protective coating (6), constituted by a thermosetting or thermoplastic elastomer or a thermoplastic plastic material, acts not only as such but also as a matrix, incorporating into the carcass (5) and forming with it a composite material.
7. Gaine tubulaire suivant une ou plusieurs des revendications 1 à 6, caractérisée en ce que le revêtement protecteur (6) présente des épaisseurs supplémentaires de revêtement dans la zone le plus exposée aux sollicitations à l'usure. 7. Tubular sheath according to one or more of claims 1 to 6, characterized in that the protective coating (6) has additional thicknesses of coating in the area most exposed to wear stresses.
8. Gaine tubulaire souple suivant une ou plusieurs des revendications 1 à 7, caractérisée en ce que le jonctionnement des bords longitudinaux de la nappe plane est réalisé après une préparation des bords par refendage et découpe dans le revêtement protecteur et, ensuite par la vulcanisation ou la polymérisation dans la cavité ainsi créée entre les deux bords d'une bande constituée d'un tissu noyé dans une couche de gomme crue et ayant la largeur et l'épaisseur de ladite cavité, de telle manière que la jonction ainsi réalisée possède une structure similaire à la nappe et une épaisseur sensiblement égale à l'épaisseur moyenne de ladite nappe. 8. flexible tubular sheath according to one or more of claims 1 to 7, characterized in that the joining of the longitudinal edges of the flat sheet is carried out after a preparation of the edges by slitting and cutting in the protective coating and, then by vulcanization or the polymerization in the cavity thus created between the two edges of a strip consisting of a fabric embedded in a layer of raw gum and having the width and the thickness of said cavity, so that the junction thus produced has a structure similar to the sheet and a thickness substantially equal to the average thickness of said sheet.
PCT/BE1992/000006 1991-03-04 1992-03-02 Tubular sheath adapted to the internal lining of tubular conduits WO1992015817A1 (en)

Applications Claiming Priority (2)

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BE9100201A BE1004649A3 (en) 1991-03-04 1991-03-04 Adapted to shaft tube lines interior trim tube.
BE9100201 1991-03-04

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WO1992015817A1 true WO1992015817A1 (en) 1992-09-17

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0668467A2 (en) * 1993-12-21 1995-08-23 CAPELLE, Robert Method for lining tubular conduits by reversion
BE1011500A3 (en) * 1997-10-17 1999-10-05 Capelle Robert Sheath for tubular pipe and pipe lined with such a sheath
EP1085250A1 (en) * 1995-10-26 2001-03-21 Bay Mills Limited Pressure expandable conduit liner
WO2001077492A1 (en) * 2000-04-05 2001-10-18 Sord Technologies Limited Apparatus for assembling a liner
WO2008087194A2 (en) * 2007-01-17 2008-07-24 Airbus Deutschland Gmbh Method of welding a thermoplastic material to a fibre composite material and device manufactured therewith

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2574898A1 (en) * 1984-12-18 1986-06-20 Ashimori Ind Co Ltd TUBULAR MATERIAL OF INTERNAL COATING FOR PIPING
EP0205621A1 (en) * 1984-12-17 1986-12-30 Ashimori Kogyo Kabushiki Kaisha Lining material for pipes
DE3614963A1 (en) * 1986-03-29 1987-10-01 Roeders Ag Geb Process for producing a renewal tube for pipelines and a renewal tube produced by this process
EP0370108A1 (en) * 1987-10-05 1990-05-30 Tokyo Gas Kabushiki Kaisha Lining material of pipeline

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0205621A1 (en) * 1984-12-17 1986-12-30 Ashimori Kogyo Kabushiki Kaisha Lining material for pipes
FR2574898A1 (en) * 1984-12-18 1986-06-20 Ashimori Ind Co Ltd TUBULAR MATERIAL OF INTERNAL COATING FOR PIPING
DE3614963A1 (en) * 1986-03-29 1987-10-01 Roeders Ag Geb Process for producing a renewal tube for pipelines and a renewal tube produced by this process
EP0370108A1 (en) * 1987-10-05 1990-05-30 Tokyo Gas Kabushiki Kaisha Lining material of pipeline

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0668467A2 (en) * 1993-12-21 1995-08-23 CAPELLE, Robert Method for lining tubular conduits by reversion
EP0668467A3 (en) * 1993-12-21 1996-07-24 Robert Capelle Method for lining tubular conduits by reversion.
EP1085250A1 (en) * 1995-10-26 2001-03-21 Bay Mills Limited Pressure expandable conduit liner
BE1011500A3 (en) * 1997-10-17 1999-10-05 Capelle Robert Sheath for tubular pipe and pipe lined with such a sheath
WO2001077492A1 (en) * 2000-04-05 2001-10-18 Sord Technologies Limited Apparatus for assembling a liner
US6953307B2 (en) 2000-04-05 2005-10-11 Sord Technologies Limited Apparatus for assembling a liner
US7318627B2 (en) 2000-04-05 2008-01-15 Sord Technologies Limted Recovery head with track seal
US7410220B2 (en) 2000-04-05 2008-08-12 Sord Resources Limited Apparatus for assembling a liner
WO2008087194A2 (en) * 2007-01-17 2008-07-24 Airbus Deutschland Gmbh Method of welding a thermoplastic material to a fibre composite material and device manufactured therewith
WO2008087194A3 (en) * 2007-01-17 2008-09-18 Airbus Gmbh Method of welding a thermoplastic material to a fibre composite material and device manufactured therewith

Also Published As

Publication number Publication date
AU1251292A (en) 1992-10-06
BE1004649A3 (en) 1993-01-05
EP0574429A1 (en) 1993-12-22

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