ES1124530U

ES1124530U - Tubular element of circular section for fluid conduction, water-resistant to oxygen and uv-resistant rays (Machine-translation by Google Translate, not legally binding)

Info

Publication number: ES1124530U
Application number: ES201430935U
Authority: ES
Inventors: José Manuel López Touzón
Original assignee: Tubos Neupex S A; TUBOS NEUPEX SA
Current assignee: Tubos Neupex S A; TUBOS NEUPEX SA
Priority date: 2014-07-04
Filing date: 2014-07-04
Publication date: 2014-09-24
Anticipated expiration: 2024-07-04
Also published as: ES1124530Y

Abstract

Tubular element of circular section for fluid conduction, impermeable to oxygen and resistant to ultraviolet rays, of plastic material whose wall comprises an inner layer (1), an outer layer (2) and at least one intermediate layer disposed between the inner (1) and outer (2) layers, characterized in that the inner layer (1) is made of temperature-resistant polyethylene and the outer layer (2) is made of ultraviolet-resistant stabilized polyethylene, a first intermediate layer (3) of oxygen-impermeable plastic material is disposed between the inner layer (1) and the outer layer (2). (Machine-translation by Google Translate, not legally binding)

Description

DESCRIPCIÓN DESCRIPTION

Elemento tubular de sección circular para conducción de fluidos impermeable al oxígeno y resistente a los rayos ultravioleta. Tubular element of circular section for fluid conduction impermeable to oxygen and resistant to ultraviolet rays.

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OBJETO DE LA INVENCIÓN OBJECT OF THE INVENTION

La presente invención se refiere a un elemento tubular de sección circular para conducción de fluidos de material plástico cuya pared está formada por varias capas, sencillo y barato de construir, resistente a la temperatura, protegido contra la absorción de oxígeno desde exterior y 10 los rayos ultravioleta. The present invention relates to a tubular element of circular section for conduction of fluids of plastic material whose wall is formed by several layers, simple and cheap to build, resistant to temperature, protected against the absorption of oxygen from outside and 10 rays ultraviolet.

ANTECEDENTES DE LA INVENCIÓN BACKGROUND OF THE INVENTION

Son conocidos elementos tubulares, como tubos y conectores de tubos, formados por varias 15 capas de materiales plásticos incluyendo en alguna o varias de ellas cargas de refuerzo. Tubular elements are known, such as tubes and tube connectors, formed by several 15 layers of plastic materials including in some or several of them reinforcement loads.

Los materiales utilizados para estos elementos tubulares son plásticos que además del polímero base necesitan una elevada cantidad relativa de aditivos, así como, varios de éstos, para conseguir la resistencia, normalmente mecánica, requerida para evitar la penetración del 20 oxígeno. The materials used for these tubular elements are plastics that in addition to the base polymer need a high relative amount of additives, as well as, several of these, to achieve the resistance, usually mechanical, required to avoid the penetration of oxygen.

Sin embargo, estos elementos tubulares no funcionan correctamente cuando los fluidos tienen elevada temperatura y se dilatan perdiendo su constante dimensional con los consiguientes problemas en la conducción y en el control de la instalación, pudiendo llegar hasta la rotura de 25 alguno de los componentes de la instalación. However, these tubular elements do not work properly when the fluids have a high temperature and expand losing their dimensional constant with the consequent problems in the conduction and in the control of the installation, being able to reach the breakage of some of the components of the installation.

Además, estos elementos tubulares por su cantidad y tipo de constituyentes son caros y complicados de construir. In addition, these tubular elements because of their quantity and type of constituents are expensive and complicated to build.

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Para solventar las desventajas citadas se propone la siguiente invención de un elemento tubular con pocos componentes, sencillo y barato de construir, resistente a la temperatura de los fluidos, evita la absorción de oxígeno del aire exterior hacia el interior de la tubería, y además, queda protegido contra los rayos solares cuando se instala al exterior. In order to solve the aforementioned disadvantages, the following invention is proposed of a tubular element with few components, simple and cheap to build, resistant to the temperature of the fluids, prevents the absorption of oxygen from the outside air into the pipe, and also, It is protected against sunlight when installed outdoors.

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DESCRIPCIÓN DE LA INVENCIÓN DESCRIPTION OF THE INVENTION

A la vista de lo anteriormente enunciado, la presente invención se refiere a un elemento tubular de sección circular para conducción de fluidos, impermeable al oxígeno y protegido contra los rayos ultravioleta. 40 In view of the foregoing, the present invention relates to a tubular element of circular section for fluid conduction, impermeable to oxygen and protected against ultraviolet rays. 40

El elemento tubular es de material plástico cuya pared comprende una capa interior, una capa exterior y al menos una capa intermedia dispuesta entre dichas capas interior y exterior. The tubular element is made of plastic material whose wall comprises an inner layer, an outer layer and at least one intermediate layer disposed between said inner and outer layers.

La capa interior es de polietileno resistente a la temperatura (PERT) y la capa exterior es de 45 polietileno estabilizado resistente a los rayos ultravioleta. The inner layer is made of temperature-resistant polyethylene (PERT) and the outer layer is stabilized polyethylene resistant to ultraviolet rays.

Así mismo, el elemento tubular comprende una primera capa intermedia de material plástico impermeable al oxígeno dispuesta entre la capa interior y la capa exterior. Likewise, the tubular element comprises a first intermediate layer of oxygen-impermeable plastic material disposed between the inner layer and the outer layer.

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La anterior distribución de capas es válida tanto para elementos tubulares flexibles como para los rígidos. En el caso de los elementos tubulares rígidos, se adiciona una segunda capa intermedia de polietileno resistente a la temperatura con fibras dispuestas aleatoriamente como material de refuerzo, de manera que esta disposición soporte la deformación por dilatación. La The previous distribution of layers is valid for both flexible and rigid tubular elements. In the case of rigid tubular elements, a second intermediate layer of temperature-resistant polyethylene is added with fibers randomly arranged as reinforcement material, so that this arrangement supports expansion deformation. The

segunda capa intermedia es recubierta por una tercera capa intermedia de polietileno resistente a la temperatura (PERT), quedando ambas capas dispuestas entre la capa interior y la primera capa intermedia. The second intermediate layer is covered by a third intermediate layer of temperature-resistant polyethylene (PERT), both layers being arranged between the inner layer and the first intermediate layer.

Ventajosamente, el espesor de pared de la capa interior, en el caso de los elementos tubulares 5 flexibles, se corresponde con el espesor total de pared que conforman la capa interior y las segunda y tercera capas intermedias, en el caso de los elementos tubulares rígidos. Advantageously, the wall thickness of the inner layer, in the case of flexible tubular elements 5, corresponds to the total wall thickness that make up the inner layer and the second and third intermediate layers, in the case of rigid tubular elements .

Ambos casos permiten mantener la resistencia mecánica necesaria para la unión del elemento tubular con un determinado accesorio, especialmente cuando el elemento tubular es un tubo, 10 ya que dicha unión se realiza por el exterior, ya sea, de la capa interior o de la tercera capa intermedia, según se trate de un tubo flexible o rígido respectivamente, quedando de esta manera suficiente espesor de pared para ser soldado sin que entre en contacto dicha soldadura con las capas más exteriores, es decir, la primera capa intermedia y la capa exterior, las cuales, protegen contra la absorción de oxígeno desde exterior y contra los rayos 15 ultravioleta respectivamente. Both cases make it possible to maintain the mechanical resistance necessary for the union of the tubular element with a certain accessory, especially when the tubular element is a tube, 10 since said union is made on the outside, either of the inner layer or of the third intermediate layer, depending on whether it is a flexible or rigid tube respectively, thus leaving sufficient wall thickness to be welded without such welding coming into contact with the outermost layers, that is, the first intermediate layer and the outer layer, which protect against the absorption of oxygen from outside and against ultraviolet rays respectively.

Por otro lado, la fijación entre la capa exterior y la primera capa intermedia puede llevarse a cabo mediante una capa de adhesivo. En cambio, ventajosamente, la fijación de la primera capa intermedia, ya sea, a la capa interior, para el caso de los elementos tubulares flexibles, o 20 a la tercera capa intermedia, para el caso de los elementos tubulares rígidos, se lleva a cabo mediante vacío. De esta forma, se garantiza que no existan restos de adhesivo al retirar la primera capa intermedia para llevar a cabo la soldadura de los tubos. On the other hand, the fixing between the outer layer and the first intermediate layer can be carried out by means of an adhesive layer. On the other hand, advantageously, the fixing of the first intermediate layer, either, to the inner layer, in the case of flexible tubular elements, or 20 to the third intermediate layer, in the case of rigid tubular elements, is carried out by vacuum. In this way, it is guaranteed that there is no adhesive residue when removing the first intermediate layer to carry out the welding of the tubes.

Otra ventaja del elemento tubular propuesto es que es estanco al agua, ya que el orden de las 25 capas no permite que el agua entre en contacto con la capa de adhesivo ni con las fibras de la segunda capa intermedia, esto último, en el caso de que se tratase de un elemento tubular rígido. Another advantage of the proposed tubular element is that it is waterproof, since the order of the 25 layers does not allow water to come into contact with the adhesive layer or with the fibers of the second intermediate layer, the latter, in the case that it was a rigid tubular element.

Otra ventaja de dicho elemento tubular es que la resistencia mecánica es elevada ya que las 30 tres primeras capas, en el caso del elemento tubular rígido, o la primera capa, en caso del flexible, son las que forman un tubo normalizado, y las restantes capas, son de protección contra la absorción de oxígeno y los rayos ultravioleta, así como, aislante térmico, si se prefiere realizar la capa exterior con polietileno espumado. Another advantage of said tubular element is that the mechanical resistance is high since the first three layers, in the case of the rigid tubular element, or the first layer, in the case of the flexible one, are those that form a normalized tube, and the remaining layers are protective against the absorption of oxygen and ultraviolet rays, as well as thermal insulation, if it is preferred to make the outer layer with foamed polyethylene.

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DESCRIPCIÓN DE LAS FIGURAS DESCRIPTION OF THE FIGURES

Se complementa la presente memoria descriptiva, con dos figuras, ilustrativas del ejemplo preferente y nunca limitativa de la invención. The present specification is complemented with two figures, illustrative of the preferred and never limiting example of the invention.

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La figura 1 representa una vista en perspectiva del elemento tubular. Figure 1 represents a perspective view of the tubular element.

La figura 2 representa una vista en perspectiva de una segunda realización del elemento tubular para el caso de que sea rígido. Figure 2 represents a perspective view of a second embodiment of the tubular element in case it is rigid.

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EXPOSICIÓN DETALLADA DE LA INVENCIÓN DETAILED EXHIBITION OF THE INVENTION

A la vista de lo anteriormente enunciado, la presente invención se refiere a un elemento tubular de sección circular para conducción de fluidos, el cual, es impermeable al oxígeno y resistente a los rayos ultravioleta. 50 In view of the foregoing, the present invention relates to a tubular element of circular section for fluid conduction, which is impermeable to oxygen and resistant to ultraviolet rays. fifty

El elemento tubular es de material plástico, cuya pared está formada por varias capas. Las capas son de material plástico compatible entre sí, de manera que se extrusionan a la vez formando el elemento tubular en cuestión. The tubular element is made of plastic material, whose wall is formed by several layers. The layers are made of plastic material compatible with each other, so that they are extruded at the same time forming the tubular element in question.

Preferentemente, el elemento tubular referido es un tubo. Preferably, the tubular element referred to is a tube.

Como se muestra en la figura 1, la pared del elemento tubular comprende una capa interior (1), una capa exterior (2), y al menos una capa intermedia dispuesta entre dichas capas interior (1) 5 y exterior (2). As shown in Figure 1, the wall of the tubular element comprises an inner layer (1), an outer layer (2), and at least one intermediate layer disposed between said inner (1) 5 and outer (2) layers.

Por su parte, la capa interior (1) es de polietileno resistente a la temperatura (PERT) y la capa exterior (2) es de polietileno estabilizado resistente a los rayos ultravioleta. For its part, the inner layer (1) is made of temperature-resistant polyethylene (PERT) and the outer layer (2) is made of stabilized polyethylene resistant to ultraviolet rays.

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Preferiblemente, el polietileno resistente a los rayos ultravioleta empleado en la realización de la capa exterior (2) es espumado. Esto permite que no solo dicha capa exterior (2) proteja al elemento tubular de la incidencia de los rayos ultravioleta cuando su instalación se realice al exterior, sino que también, contribuya a su aislamiento térmico. Preferably, the ultraviolet-resistant polyethylene used in the realization of the outer layer (2) is foamed. This allows that not only said outer layer (2) protects the tubular element from the incidence of ultraviolet rays when its installation is carried out outdoors, but also contributes to its thermal insulation.

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El elemento tubular también comprende una primera capa intermedia (3) de material plástico impermeable al oxígeno, la cual, se dispone entre la capa interior (1) y la capa exterior (2). The tubular element also comprises a first intermediate layer (3) of oxygen-impermeable plastic material, which is disposed between the inner layer (1) and the outer layer (2).

El material plástico impermeable al oxígeno puede ser cualquiera de los conocidos, por ejemplo, Etilen Vinil Alcohol (EVOH), Cloruro de Polivinilo Clorado (PVCC), etc. Sin embargo, 20 se prefiere que la primera capa intermedia (3) sea realizada de Etilen Vinil Alcohol (EVOH). The oxygen-impermeable plastic material may be any of those known, for example, Ethylene Vinyl Alcohol (EVOH), Chlorinated Polyvinyl Chloride (PVCC), etc. However, it is preferred that the first intermediate layer (3) be made of Ethylene Vinyl Alcohol (EVOH).

La distribución de capas anterior es suficiente para los elementos tubulares flexibles, sin embargo, como se muestra en la figura 2, para el caso de los elementos tubulares rígidos se prefiere que entre la capa interior (1) y la primera capa intermedia (3) esté dispuesta una 25 segunda capa intermedia (5) de polietileno resistente a la temperatura con fibras dispuestas aleatoriamente como material de refuerzo, estando dicha segunda capa intermedia (5) recubierta por una tercera capa intermedia (6) de polietileno resistente a la temperatura (PERT). The distribution of anterior layers is sufficient for flexible tubular elements, however, as shown in Figure 2, for the case of rigid tubular elements it is preferred that between the inner layer (1) and the first intermediate layer (3) a second intermediate layer (5) of temperature resistant polyethylene is arranged with fibers randomly arranged as reinforcement material, said second intermediate layer (5) being covered by a third intermediate layer (6) of temperature resistant polyethylene (PERT ).

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Las fibras pueden ser realizadas de materiales diversos, por ejemplo, pueden utilizarse fibras de vidrio, de carbono, etc. Preferentemente, con una longitud de hasta 6 mm. The fibers can be made of various materials, for example, glass, carbon fibers, etc. can be used. Preferably, with a length of up to 6 mm.

Igualmente se prefiere que el espesor de pared de la capa interior (1), en el caso de los elementos tubulares flexibles, se corresponda con el espesor total de pared que conforman la 35 capa interior (1) y las segunda (3) y tercera (6) capas intermedias, en el caso de los elementos tubulares rígidos. It is also preferred that the wall thickness of the inner layer (1), in the case of flexible tubular elements, corresponds to the total wall thickness that make up the inner layer (1) and the second (3) and third (6) intermediate layers, in the case of rigid tubular elements.

En ambas realizaciones, es decir, tanto para la disposición de capas a emplearse en los elementos tubulares flexibles, véase figura 1, como la empleada en los elementos tubulares 40 rígidos, véase figura 2, se prefiere que la fijación entre la capa exterior (2) y la primera capa intermedia (3) se lleve a cabo mediante una capa de adhesivo (4). In both embodiments, that is, both for the arrangement of layers to be used in the flexible tubular elements, see figure 1, as used in the rigid tubular elements 40, see figure 2, it is preferred that the fixing between the outer layer (2 ) and the first intermediate layer (3) is carried out by means of an adhesive layer (4).

Sin embargo, se prefiere que la fijación de la primera capa intermedia (3) a la capa interior (1) se realice por medio de vacío, cuando se trate de tubos flexibles. De igual forma, para la 45 fijación de la primera capa intermedia (3) a la tercera capa intermedia (6) de los tubos rígidos. However, it is preferred that the fixing of the first intermediate layer (3) to the inner layer (1) is carried out by means of vacuum, in the case of flexible tubes. Likewise, for fixing the first intermediate layer (3) to the third intermediate layer (6) of the rigid tubes.

En ambos casos, se busca garantizar que no existan restos de adhesivo al retirar la primera capa intermedia (3), cuando se valla a llevar a cabo la soldadura de los tubos. In both cases, it is sought to ensure that there are no adhesive residues when removing the first intermediate layer (3), when the pipes are welded.

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Como puede verse, la disposición de capas y materiales de ambas realizaciones del elemento tubular objeto de la presente invención resulta de especial aplicación en instalaciones para conducciones de líquidos en interior o exterior de edificios con presión y temperatura, donde se requiere evitar la corrosión de los elementos metálicos que se encuentran en la instalación, As can be seen, the arrangement of layers and materials of both embodiments of the tubular element object of the present invention is of special application in installations for conduits of liquids inside or outside of buildings with pressure and temperature, where it is required to avoid corrosion of the metal elements found in the installation,

producida por un exceso de oxigenación del agua. En concreto, el elemento tubular es útil en la conducción de agua en circuitos de calefacción y climatización que puede trabajar con seguridad a alta temperatura, disminuyendo la corrosión de calderas, bombas, válvulas, etc., y a su vez, es apto para conectarse con elementos de la instalación situados en el exterior del edificio sin requerirse protección adicional contra los rayos ultravioleta. 5 produced by an excess of oxygenation of the water. Specifically, the tubular element is useful in the conduction of water in heating and air conditioning circuits that can work safely at high temperature, reducing the corrosion of boilers, pumps, valves, etc., and in turn, is suitable for connecting with Installation elements located outside the building without requiring additional protection against ultraviolet rays. 5

El material de polietileno resistente a la temperatura (PERT) empleado en la realización de la capa interior (1), así como, de la tercera capa intermedia (6), particularmente empleada en los tubos rígidos, es resistente a la temperatura según la norma UNE EN-ISO 22391 y no necesita de aditivos para cumplir su función de resistencia a la temperatura. En todo caso, se utiliza 10 algún aditivo para facilitar la aglomeración con las fibras de la segunda capa intermedia (5), empleada también en la realización de tubos rígidos. The temperature-resistant polyethylene material (PERT) used in the realization of the inner layer (1), as well as the third intermediate layer (6), particularly used in rigid tubes, is temperature resistant according to the standard UNE EN-ISO 22391 and does not need additives to fulfill its function of temperature resistance. In any case, some additive is used to facilitate agglomeration with the fibers of the second intermediate layer (5), also used in the construction of rigid tubes.

Por su parte, el Etilen Vinil Alcohol (EVOH), empleado como material para la realización de la primera capa intermedia (3), controla la absorción del oxígeno del aire exterior hacia el interior 15 del tubo, y la capa exterior (2) de polietileno estabilizado resistente a los rayos ultravioleta, permite la instalación del tubo en el exterior de los edificios sin requerirse protección adicional contra dichos rayos. Adicionalmente, si dicha capa exterior (2) es realizada en polietileno espumado, sirve además como aislamiento térmico. For its part, Ethylene Vinyl Alcohol (EVOH), used as a material for the realization of the first intermediate layer (3), controls the absorption of oxygen from the outside air into the tube 15, and the outer layer (2) of stabilized polyethylene resistant to ultraviolet rays, allows the installation of the tube outside the buildings without requiring additional protection against such rays. Additionally, if said outer layer (2) is made of foamed polyethylene, it also serves as thermal insulation.

Claims

1.- Tubular element of circular section for fluid conduction, oxygen impermeable and resistant to ultraviolet rays, of plastic material whose wall comprises an inner layer (1), an outer layer (2) and at least one intermediate layer arranged between the inner (1) and outer (2) layers, characterized in that the inner layer (1) is of temperature-resistant polyethylene 5 and the outer layer (2) is of stabilized polyethylene resistant to ultraviolet rays, a first intermediate layer (3) of oxygen-impermeable plastic material is disposed between the inner layer (1) and the outer layer (2).

2. Tubular element according to claim 1, wherein the ultraviolet-resistant polyethylene 10 of the outer layer (2) is foamed.

3. Tubular element according to claims 1 or 2, wherein the fixing between the outer layer (2) and the first intermediate layer (3) is carried out by means of an adhesive layer (4).

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4. Tubular element according to claim 1, wherein the fixing of the first intermediate layer (3) to the inner layer (1) is carried out by vacuum.

5. Tubular element according to claim 1, wherein between the inner layer (1) and the first intermediate layer (3) a second intermediate layer (5) of temperature resistant polyethylene 20 with fibers randomly arranged as material is arranged of reinforcement, the second intermediate layer (5) is covered by a third intermediate layer (6) of temperature-resistant polyethylene.

6. Tubular element according to claim 5, wherein the fibers have a length of up to 25 6 mm.

7. Tubular element according to claim 5, wherein the fixation of the first intermediate layer (3) to the third intermediate layer (6) is carried out by vacuum.

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8. Tubular element according to claim 1 characterized in that it is a tube.

9. Tubular element according to claim 1, wherein the oxygen impermeable plastic material is Ethylene Vinyl Alcohol.