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WO2008139004A1 - Method for manufacturing a three-layer corrugated pipe, head therefor and the resulting pipe - Google Patents

Method for manufacturing a three-layer corrugated pipe, head therefor and the resulting pipe Download PDF

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Publication number
WO2008139004A1
WO2008139004A1 PCT/ES2007/070092 ES2007070092W WO2008139004A1 WO 2008139004 A1 WO2008139004 A1 WO 2008139004A1 ES 2007070092 W ES2007070092 W ES 2007070092W WO 2008139004 A1 WO2008139004 A1 WO 2008139004A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
pipe
corrugated
manufacturing
central
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/ES2007/070092
Other languages
Spanish (es)
French (fr)
Inventor
Constantino Gonzalez Gomez
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Uralita Sistemas de Tuberias SA
Original Assignee
Uralita Sistemas de Tuberias SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Uralita Sistemas de Tuberias SA filed Critical Uralita Sistemas de Tuberias SA
Priority to ES200950055A priority Critical patent/ES2370484B1/en
Priority to PT2007070092A priority patent/PT2008139004W/en
Priority to PCT/ES2007/070092 priority patent/WO2008139004A1/en
Publication of WO2008139004A1 publication Critical patent/WO2008139004A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
    • B29C57/02—Belling or enlarging, e.g. combined with forming a groove
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • 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
    • F16L11/11—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall
    • 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
    • F16L11/14—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics
    • F16L11/15—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics corrugated
    • 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
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
    • F16L47/08—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with sealing rings arranged between the outer surface of one pipe end and the inner surface of the sleeve or socket, the sealing rings being placed previously in the sleeve or socket
    • 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
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/151—Coating hollow 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • 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
    • B29L2023/18—Pleated or corrugated hoses
    • 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
    • B29L2023/18—Pleated or corrugated hoses
    • B29L2023/186—Pleated or corrugated hoses having a smooth internal wall

Definitions

  • the object of the present invention is both the manufacturing process of a three-layer corrugated pipe, and the head used in the manufacture of the outer layer of the pipe as well as the pipe obtained by the present process.
  • Also characterized by the present invention is the special configuration and design of the head used in the manufacture of the outer layer of the three-layer corrugated pipe.
  • the present invention is circumscribed within the scope of structured pipes and more precisely within three-layer corrugated pipes.
  • corrugated pipes are known, some of them as the type of pipes shown in EP 385465, although a corrugated pipe is shown, is not a three-layer pipe, it is also formed by a series of alveolar assemblies emerging from a flat surface arranged at the base.
  • three-layer corrugated pipes are known, which are formed by a central and corrugated layer with any design, arranged between a lower layer that would chew the inside of the pipe, a layer that is smooth and cylindrical, and between an outer layer that would be the layer exterior of the pipe, also smooth and cylindrical.
  • the manufacturing of the third layer is not carried out by means of an extrusion head that applies said third layer directly on the corrugated core of the pipe.
  • Another difficulty present in the existing manufacturing process is the absence of any flare operation of the pipe ends once obtained with a specific design that allows the connection between sections of three-corrugated pipes in a simple, easy and efficient way. . Therefore, it is the object of the present invention to overcome the drawbacks derived from the existing manufacturing process so far in the manufacture of three-layer corrugated pipes, improving the required stages, the materials used in the manufacturing as well as the precise machinery for said finish.
  • the present invention aims at a process for manufacturing a three-layer corrugated pipe, as well as the means used in the manufacture of said pipe, and the pipe obtained by the process and the means described.
  • the manufacturing process of a three-layer corrugated pipe starting from a base assembly formed a central corrugated layer arranged on a bottom or base layer, which is smooth and cylindrical and forms the inner face of the final pipe, and consists of the following stages:
  • Said base assembly is passed through an extrusion head that applies the third layer that supports it on the crests of the central or core layer.
  • Flare of at least one end of the pipe that allows the coupling and connection of two sections of three-corrugated pipe tightly.
  • the material used in the manufacture of the three-layer pipe is polypropylene, this material against polyethylene has a better mechanical and thermal behavior.
  • Polypropylene has one of the highest tensile elongations, it is one of the materials that have more resistance to the impact of all thermoplastics and is harder than polyethylene, also has a higher melting temperature than polyethylene and a plastic memory that allows it to recover its position after deformation.
  • the third layer application head in the three-layer corrugated pipe manufacturing process has a general annular configuration that allows a perfect application on the ridges of the corrugated central layer, in addition to being able to regulate the thickness or thickness of the third layer.
  • Figure 1 shows a representation of the structure and composition of a three-layer corrugated pipe.
  • Figure 2 shows a sectional head of the third layer in the manufacturing process of the third layer.
  • Figure 3 shows two sections of pipe arranged to be connected where on one of the edges of a section of pipe a flare has been made.
  • Figure 4 shows the previous connected pipes.
  • Figure 1 shows the structural configuration of a three-layer corrugated pipe such as that of the invention, which is formed by a corrugated central layer (2), arranged on a smooth and cylindrical base layer (1) that will be the inner face of the final pipe On the upper crests of the central layer there is a third layer (3) that will be the outer face of the pipe.
  • corrugated central layer The geometry and configuration of the corrugated central layer are not limiting, being able to choose the configuration that could best adapt to the intended purposes.
  • the essentiality of the invention lies in the process of manufacturing the pipe and more specifically in that of the third layer (3) of the three-layer corrugated pipe, as well as in the following flaring process carried out on at least one of the ends of the pipe once obtained.
  • the third layer (3) is applied by extrusion, using an application extruder head that allows the regulation of the width or thickness of the third layer (3).
  • the head (4) of application of the third layer which has a general annular configuration, which has a body (5) on which there is a part or distributor (6) of material of the third layer (3).
  • Said distributor piece (6) is arranged concentrically with respect to the body (5).
  • a female part (8) responsible for calibrating the outer diameter that the third layer would have, as well as a male part (7) that will be responsible for defining the inner diameter of the third layer (3) .
  • a mechanism (9) that allows to regulate the thickness of the third layer.
  • the extrusion head (4) logically, must be connected by means of a coupling piece (11) through which the material (10) used in the manufacture of the third layer flows, with the reservoir or source supplying the material used in the extrusion of the third layer.
  • said flare (17) taken from the innermost part of the pipe towards its free end will be formed by a first inclined section (12) that would increase its internal diameter, followed by a straight section (13) followed by a thickening (14) made outwards, which defines inside the pipe a housing (15) of an elastomeric joint (18) (figure 4).
  • the connection point between the inclined section (12) and the straight section defines a stop point (16) to which the pipe to be connected can penetrate, as can be seen in Figure 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

A method for manufacturing a three-layer corrugated pipe based on an arrangement formed by a central corrugated layer (2) arranged on a smooth cylindrical layer (1) to which a third layer (1) is applied by means of an extruder head which applies a third layer (3) in a uniform manner on the crests of the central corrugated layer (2), whereby the thickness of the third layer (3) can be controlled, subsequently proceeding to creating an expansion in at least one of the free ends in order to enable a sealed connection between sections of piping with the initial one inclined followed by a horizontal section and finally a re-thickening in which in the internal part a housing is defined for an elastomeric seal.

Description

PROCEDIMIENTO DE FABRICACIÓN DE TUBERÍA CORRUGADA TRICAPA, CABEZAL EMPLEADO EN LA FABRICACIÓN Y LA TUBERÍA MANUFACTURING PROCEDURE OF TRICAPA CORRUGATED PIPING, HEAD USED IN MANUFACTURING AND PIPING

ASÍ OBTENIDAThus obtained

DESCRIPCIÓNDESCRIPTION

OBJETO DE LA INVENCIÓNOBJECT OF THE INVENTION

Es objeto de la presente invención tanto el procedimiento de fabricación de una tubería corrugada tricapa, como el cabezal empleado en la fabricación de la capa exterior de la tubería asi como la tubería obtenida mediante el presente procedimiento.The object of the present invention is both the manufacturing process of a three-layer corrugated pipe, and the head used in the manufacture of the outer layer of the pipe as well as the pipe obtained by the present process.

Caracteriza a la presente invención las etapas propias de fabricación de la tubería corrugada tricapa y de manera particular la forma y materiales empleados en la disposición de una tercera capa, que seria la exterior del conjunto, asi como el proceso posterior de abocardado que tiene lugar sobre el extremo del tubo.It characterizes the present invention the stages of manufacture of the three-layer corrugated pipe and in particular the shape and materials used in the provision of a third layer, which would be the exterior of the assembly, as well as the subsequent process of flare that takes place on the end of the tube

También caracteriza a la presente invención la especial configuración y diseño del cabezal empleado en la fabricación de capa exterior de la tubería corrugada tricapa .Also characterized by the present invention is the special configuration and design of the head used in the manufacture of the outer layer of the three-layer corrugated pipe.

Por lo tanto, la presente invención se circunscribe dentro del ámbito de las tuberías estructuradas y de manera más precisa dentro de las tuberías corrugadas tricapas.Therefore, the present invention is circumscribed within the scope of structured pipes and more precisely within three-layer corrugated pipes.

ANTECEDENTES DE LA INVENCIÓNBACKGROUND OF THE INVENTION

En el sector de la técnica de la presente invención, son conocidas las tuberías corrugadas, algunas de ellas como el tipo de tuberías mostradas en la patente EP 385465 si bien se muestra una tubería corrugada, no es una tubería tricapa, además está formada por una serie de conjuntos alveolares emergidos de una superficie plana dispuesta en la base.In the field of the art of the present invention, corrugated pipes are known, some of them as the type of pipes shown in EP 385465, although a corrugated pipe is shown, is not a three-layer pipe, it is also formed by a series of alveolar assemblies emerging from a flat surface arranged at the base.

En otros casos se conocen tuberías corrugadas tricapa, que están formadas por una capa central y corrugada con cualquier diseño, dispuesta entre una capa inferior quesería la interior de la tubería, capa que es lisa y cilindrica, y entre una capa exterior que seria la capa exterior de la tubería, también lisa y cilindrica.In other cases, three-layer corrugated pipes are known, which are formed by a central and corrugated layer with any design, arranged between a lower layer that would chew the inside of the pipe, a layer that is smooth and cylindrical, and between an outer layer that would be the layer exterior of the pipe, also smooth and cylindrical.

Sin embargo, estas tuberías corrugadas tricapas, emplean como material para todas las capas polietileno, que si bien sirve para cubrir las necesidades para las que se emplea la tubería, no cubre de manera satisfactoria todas las situaciones y requerimientos a los que pudiera estar sometida la tubería.However, these three-corrugated pipes, used as a material for all polyethylene layers, which although it serves to cover the needs for which the pipe is used, does not satisfactorily cover all situations and requirements to which the pipeline.

Por otro lado, en el procedimiento de fabricación de las tuberías tricapas actualmente existentes, la fabricación de la tercera capa no se realiza mediante un cabezal de extrusión que aplica dicha tercera capa directamente sobre el alma corrugada de la tubería.On the other hand, in the manufacturing process of currently existing three-layer pipes, the manufacturing of the third layer is not carried out by means of an extrusion head that applies said third layer directly on the corrugated core of the pipe.

Otra dificultad presente en el procedimiento de fabricación existente, es la ausencia de operación alguna de abocardado de los extremos de las tuberías una vez obtenidas con un diseño concreto que permite realizar la conexión entre tramos de tuberías corrugadas tricapas de una manera, fácil sencilla y eficaz. Por lo tanto, es objeto de la presente invención superar los inconvenientes derivados del procedimiento de fabricación existente hasta el momento en la fabricación de tuberías corrugadas tricapas, mejorando las etapas que se precisan, los materiales empleados en la fabricación asi como la maquinaria precisa para dicho fin.Another difficulty present in the existing manufacturing process is the absence of any flare operation of the pipe ends once obtained with a specific design that allows the connection between sections of three-corrugated pipes in a simple, easy and efficient way. . Therefore, it is the object of the present invention to overcome the drawbacks derived from the existing manufacturing process so far in the manufacture of three-layer corrugated pipes, improving the required stages, the materials used in the manufacturing as well as the precise machinery for said finish.

DESCRIPCIÓN DE LA INVENCIÓNDESCRIPTION OF THE INVENTION

La presente invención tiene por objetivo un procedimiento de fabricación de una tubería corrugada tricapa, asi como los medios empleados en la fabricación de dicha tubería, y la tubería obtenida por el procedimiento y los medios descritos.The present invention aims at a process for manufacturing a three-layer corrugated pipe, as well as the means used in the manufacture of said pipe, and the pipe obtained by the process and the means described.

El procedimiento de fabricación de una tubería corrugada tricapa, partirla de un conjunto base formado una capa corrugada central dispuesta sobre una capa inferior o base, que es lisa y cilindrica y conforma la cara interior de la tubería final, y constarla de las siguientes etapas:The manufacturing process of a three-layer corrugated pipe, starting from a base assembly formed a central corrugated layer arranged on a bottom or base layer, which is smooth and cylindrical and forms the inner face of the final pipe, and consists of the following stages:

A dicho conjunto base se la hace pasar por un cabezal de extrusión que aplica la tercera capa que apoyarla sobre las crestas de la capa central o alma.Said base assembly is passed through an extrusion head that applies the third layer that supports it on the crests of the central or core layer.

Abocardado de al menos un extremo de la tubería que permita al acoplamiento y conexión de dos tramos de tubería corrugada tricapa de manera estanca.Flare of at least one end of the pipe that allows the coupling and connection of two sections of three-corrugated pipe tightly.

El material empleado en la fabricación de la tubería tricapa es polipropileno, este material frente al polietileno presenta un mejor comportamiento tanto mecánico como térmico. El polipropileno presenta uno de los más altos alargamientos en tracción, es uno de los materiales que más resistencia presenta al impacto de todos los termoplásticos y es más duro que el polietileno, tiene además una temperatura de fusión superior a la del polietileno y una memoria plástica que le permite recuperar su posición tras una deformación.The material used in the manufacture of the three-layer pipe is polypropylene, this material against polyethylene has a better mechanical and thermal behavior. Polypropylene has one of the highest tensile elongations, it is one of the materials that have more resistance to the impact of all thermoplastics and is harder than polyethylene, also has a higher melting temperature than polyethylene and a plastic memory that allows it to recover its position after deformation.

El cabezal de aplicación de la tercera capa en el proceso de fabricación de la tubería corrugada tricapa presenta una configuración general anular que permite una perfecta aplicación sobre las crestas de la capa central corrugada, además de poder regular el grosor o espesor de la tercera capa.The third layer application head in the three-layer corrugated pipe manufacturing process has a general annular configuration that allows a perfect application on the ridges of the corrugated central layer, in addition to being able to regulate the thickness or thickness of the third layer.

EXPLICACIÓN DE LAS FIGURASEXPLANATION OF THE FIGURES

Para complementar la descripción que seguidamente se va a realizar y con objeto de ayudar a una mejor comprensión de sus características, se acompaña a la presente memoria descriptiva, de un juego de planos en cuyas figuras, de forma ilustrativa y no limitativa, se representan los detalles más significativos de la invención.To complement the description that is going to be carried out below and in order to help a better understanding of its characteristics, this descriptive report is accompanied by a set of drawings in whose figures, in an illustrative and non-limiting manner, the most significant details of the invention.

La figura 1, muestra una representación de la estructura y composición de una tubería corrugada tricapa .Figure 1 shows a representation of the structure and composition of a three-layer corrugated pipe.

La figura 2, muestra de manera seccionada un cabezal de aplicación de la tercera capa en el procedimiento de fabricación de la tercera capa.Figure 2 shows a sectional head of the third layer in the manufacturing process of the third layer.

La figura 3, muestra dos tramos de tubería dispuestos a ser conectados donde sobre uno de los bordes de un tramo de tubería se ha procedido a realizar un abocardado. La figura 4, muestra las anteriores tuberías conectadas .Figure 3 shows two sections of pipe arranged to be connected where on one of the edges of a section of pipe a flare has been made. Figure 4 shows the previous connected pipes.

REALIZACIÓN PREFERENTE DE LA INVENCIÓNPREFERRED EMBODIMENT OF THE INVENTION

A la vista de las figuras se describe seguidamente un modo de realización preferente de la invención propuesta.In view of the figures, a preferred embodiment of the proposed invention is described below.

La figura 1, muestra la configuración estructural que presenta una tubería corrugada tricapa como la de la invención, que está conformada por una capa central corrugada (2), dispuesta sobre una capa base (1) lisa y cilindrica que será la cara interior de la tubería final. Sobre las crestas superiores de la capa central hay una tercera capa (3) que será la cara exterior de la tubería.Figure 1 shows the structural configuration of a three-layer corrugated pipe such as that of the invention, which is formed by a corrugated central layer (2), arranged on a smooth and cylindrical base layer (1) that will be the inner face of the final pipe On the upper crests of the central layer there is a third layer (3) that will be the outer face of the pipe.

La geometría y configuración de la capa central corrugada no son limitativas, pudiéndose elegir aquella configuración que mejor pudiera adaptarse a los fines buscados .The geometry and configuration of the corrugated central layer are not limiting, being able to choose the configuration that could best adapt to the intended purposes.

La esencialidad de la invención reside en el procedimiento de fabricación de la tubería y de manera más concreta en la de la tercera capa (3) de la tubería corrugada tricapa, asi como en el proceso siguiente de abocardado realizado en al menos uno de los extremos de la tubería una vez obtenido. La tercera capa (3) es aplicada mediante extrusión, empleando para ello un cabezal extrusor de aplicación que permite la regulación del ancho o grosor de la tercera capa (3) .The essentiality of the invention lies in the process of manufacturing the pipe and more specifically in that of the third layer (3) of the three-layer corrugated pipe, as well as in the following flaring process carried out on at least one of the ends of the pipe once obtained. The third layer (3) is applied by extrusion, using an application extruder head that allows the regulation of the width or thickness of the third layer (3).

Asi en la figura 2 observamos el cabezal (4) de aplicación de la tercera capa, que presenta una configuración general anular, que tiene un cuerpo (5) sobre el que hay una pieza o distribuidor (6) de material de la tercera capa (3) . Dicha pieza distribuidora (6) está dispuesta de manera concéntrica con relación al cuerpo (5) . Conectadas con las anteriores piezas hay por un lado una pieza hembra (8) encargada de calibrar el diámetro exterior que tendría la tercera capa, asi como una pieza macho (7) que será encarga de definir el diámetro interior de la tercera capa (3) . Finalmente hay un mecanismo (9) que permite regular el grosor de la tercera capa.So in figure 2 we see the head (4) of application of the third layer, which has a general annular configuration, which has a body (5) on which there is a part or distributor (6) of material of the third layer (3). Said distributor piece (6) is arranged concentrically with respect to the body (5). Connected with the previous pieces there is on the one hand a female part (8) responsible for calibrating the outer diameter that the third layer would have, as well as a male part (7) that will be responsible for defining the inner diameter of the third layer (3) . Finally there is a mechanism (9) that allows to regulate the thickness of the third layer.

El cabezal de extrusión (4), lógicamente debe estar conectada mediante una pieza de acoplamiento (11) a través de la que fluye el material (10) empleado en la fabricación de la tercera capa, con el depósito o fuente suministradora del material empleado en la extrusión de la tercera capa.The extrusion head (4), logically, must be connected by means of a coupling piece (11) through which the material (10) used in the manufacture of the third layer flows, with the reservoir or source supplying the material used in the extrusion of the third layer.

En la figura 3, se muestra uno de entre los posibles aspectos que pudiera tener el abocardado realizado sobre uno de los extremos de la tubería una vez fabricada.In figure 3, one of the possible aspects that the flaring made on one of the ends of the pipe once manufactured is shown.

Observamos que dicho abocardado (17) tomado desde la parte más interna de la tubería hacia su extremo libre, estarla formado por un primer tramo inclinado (12) que aumentarla su diámetro interior, seguido de un tramo recto (13) al que sigue un regruesamiento (14) realizado hacia el exterior, que define en el interior de la tubería un alojamiento (15) de una junta elastomérica (18) (figura 4) . El punto de conexión entre el tramo inclinado (12) y el tramo recto, define un punto tope (16) hasta donde puede penetrar la tubería a conectar, tal y como puede observarse en la figura 4.We observe that said flare (17) taken from the innermost part of the pipe towards its free end, will be formed by a first inclined section (12) that would increase its internal diameter, followed by a straight section (13) followed by a thickening (14) made outwards, which defines inside the pipe a housing (15) of an elastomeric joint (18) (figure 4). The connection point between the inclined section (12) and the straight section defines a stop point (16) to which the pipe to be connected can penetrate, as can be seen in Figure 4.

No altera la esencialidad de esta invención variaciones en materiales, forma, tamaño y disposición de los elementos componentes, descritos de manera no limitativa, bastando ésta para su reproducción por un experto . It does not alter the essentiality of this invention variations in materials, shape, size and arrangement of the component elements, described in a non-limiting manner, this being sufficient for reproduction by an expert.

Claims

REIVINDICACIONES 1.- Procedimiento de fabricación de una tuberia corrugada tricapa que está formada por una capa central corrugada (2), una capa base (1) que es lisa y cilindrica, y una capa exterior o tercera capa (3) caracterizado porque el procedimiento partiendo de un conjunto base formado la capa corrugada central y la capa inferior o base, que es lisa y cilindrica y conforma la cara interior de la tuberia final, y consta de las siguientes etapas:1.- Manufacturing procedure of a three-layer corrugated pipe that is formed by a corrugated central layer (2), a base layer (1) that is smooth and cylindrical, and an outer layer or third layer (3) characterized in that the starting process from a base set formed the central corrugated layer and the bottom or base layer, which is smooth and cylindrical and forms the inner face of the final pipe, and consists of the following stages: • A dicho conjunto base se la hace pasar por un cabezal de extrusión que aplica la tercera capa que apoyarla sobre las crestas de la capa central o alma.• This base assembly is passed through an extrusion head that applies the third layer that supports it on the crests of the central or core layer. " Abocardado de al menos un extremo de la tuberia que permita al acoplamiento y conexión de dos tramos de tuberia corrugada tricapa de manera estanca."Flare of at least one end of the pipe that allows the coupling and connection of two sections of three-corrugated pipe tightly. 2.- Procedimiento de fabricación de una tuberia corrugada tricapa según la reivindicación 1, caracterizado porque el abocardado de al menos un extremo de la tuberia presenta desde la parte interior de la tuberia hacia su extremo libre con un primer tramo inclinado (12) que aumentarla su diámetro interior, seguido de un tramo recto (13) al que sigue un regruesamiento (14) realizado hacia el exterior, que define en el interior de la tuberia un alojamiento (15) de una junta elastomérica (18), donde el punto de conexión entre el tramo inclinado (12) y el tramo recto, define un punto tope (16) hasta donde puede penetrar la tuberia a conectar.2. Method of manufacturing a three-layer corrugated pipe according to claim 1, characterized in that the flaring of at least one end of the pipe has from the inside of the pipe towards its free end with a first inclined section (12) to increase it its inner diameter, followed by a straight section (13) followed by a thickening (14) made outwards, which defines inside the pipe a housing (15) of an elastomeric joint (18), where the point of connection between the inclined section (12) and the straight section, defines a stop point (16) as far as the pipe to be connected can penetrate. 3.- Procedimiento de fabricación de una tuberia corrugada tricapa según cualquiera de las reivindicaciones anteriores, caracterizado porque el material empleado en todas las capas es polipropileno.3.- Manufacturing procedure of a three-layer corrugated pipe according to any of the previous claims, characterized in that the material used in all layers is polypropylene. 4.- Cabezal de extrusión empleado en el procedimiento de fabricación anteriormente reivindicado caracterizado porque presenta una configuración general anular, que tiene un cuerpo (5) sobre el que hay una pieza o distribuidor (6) de material de la tercera capa4. Extrusion head used in the manufacturing process previously claimed characterized in that it has a general annular configuration, which has a body (5) on which there is a part or distributor (6) of third layer material (3), dicha pieza distribuidora (6) está dispuesta de manera concéntrica con relación al cuerpo (5) , donde conectadas con las anteriores piezas hay por un lado una pieza hembra (8) encargada de calibrar el diámetro exterior que tendría la tercera capa, asi como una pieza macho (7) que será encarga de definir el diámetro interior de la tercera capa (3) , finalmente hay un mecanismo (9) que permite regular el grosor de la tercera capa.(3), said distributor piece (6) is arranged concentrically with respect to the body (5), where connected to the previous pieces there is on the one hand a female part (8) responsible for calibrating the outer diameter that the third layer would have , as well as a male part (7) that will be responsible for defining the inner diameter of the third layer (3), finally there is a mechanism (9) that allows regulating the thickness of the third layer. 5.- Tubería corrugada tricapa obtenida mediante el procedimiento y cabezal de extrusión anteriormente reivindicado caracterizada porque consta de una capa central corrugada (2), dispuesta sobre una capa base (1) lisa y cilindrica y de una tercera capa (3) dispuesta sobre las crestas superiores de la capa central corrugada (1), y que en al menos unos de sus extremos presenta un abocardado.5.- Three-layer corrugated pipe obtained by the procedure and extrusion head previously claimed characterized in that it consists of a corrugated central layer (2), arranged on a smooth and cylindrical base layer (1) and a third layer (3) arranged on the upper ridges of the corrugated central layer (1), and that at least one of its ends has a flare. 6.- Tubería corrugada tricapa según la reivindicación 6 caracterizada porque el abocardado realizado sobre al menos uno de los extremos de la tubería tricapa presenta desde la parte interior de la tubería hacia su extremo libre con un primer tramo inclinado (12) que aumentarla su diámetro interior, seguido de un tramo recto (13) al que sigue un regruesamiento (14) realizado hacia el exterior, que define en el interior de la tubería un alojamiento (15) de una junta elastomérica (18), donde el punto de conexión entre el tramo inclinado (12) y el tramo recto, define un punto tope (16) hasta donde puede penetrar la tubería a conectar. 6. Three-corrugated pipe according to claim 6 characterized in that the flaring made on at least one of the ends of the three-layer pipe presents from the inside of the pipe towards its free end with a first inclined section (12) which will increase its diameter interior, followed by a straight section (13) followed by a thickening (14) made outwards, which defines inside the pipe a housing (15) of an elastomeric joint (18), where the connection point between the inclined section (12) and the straight section, defines a stop point (16) to which the pipe can penetrate to connect
PCT/ES2007/070092 2007-05-14 2007-05-14 Method for manufacturing a three-layer corrugated pipe, head therefor and the resulting pipe Ceased WO2008139004A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES200950055A ES2370484B1 (en) 2007-05-14 2007-05-14 MANUFACTURING PROCEDURE OF TRICAPA CORRUGATED PIPE, MANUFACTURING HEAD AND THE PIPE SO OBTAINED.
PT2007070092A PT2008139004W (en) 2007-05-14 2007-05-14 Method for manufacturing a three-layer corrugated pipe, head therefor and the resulting pipe
PCT/ES2007/070092 WO2008139004A1 (en) 2007-05-14 2007-05-14 Method for manufacturing a three-layer corrugated pipe, head therefor and the resulting pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/ES2007/070092 WO2008139004A1 (en) 2007-05-14 2007-05-14 Method for manufacturing a three-layer corrugated pipe, head therefor and the resulting pipe

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ES2370484A1 (en) 2011-12-16
PT2008139004W (en) 2010-06-15

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