DE112006001201T5 - Improvement in a multilayer composite line - Google Patents

Abstract

The invention relates to multilayer composite pipes which are resistant to pressure and corrosion and are used in sanitary systems, having at least one inner pipe (1) with low oxygen permeability and at least one on this inner pipe (1) applied aluminum foil (3) with a thermal expansion coefficient lower than that of the inner pipe (1), where:
- At least one filling cavity (3.1) in the form of a channel, which makes it possible to scrape the visible at the end of the composite line surface of the aluminum coating (3) and to leave them inside the plastic and to embed it, and the scraped volume by filling with plastic material to cover the aluminum coating (3) together with the inner pipe (1) inside an extension part, without peeling the coating during the connection operation for the composite line by means of the extension parts, which is preferably done by a welding process.

Description

technical area

The Invention relates to a sanitary systems known product known as composite pipe. The invention in particular concerns the combination of multilayer interconnectors.

background the invention

multilayer Composite cables are products intended for use during transport hot Fluids are designed. As it is already known, show plastic pipes the tendency to increase with a temperature increase in the longitudinal direction expand. To prevent this expansion, is with the plastic a material combining a metal with an expansion coefficient is derived below the plastic material, whereby a Composite line is obtained. Except the stretch exists another reason for the advantage of composite cables for combination systems used in buildings in the requirement to prevent the penetration of oxygen into the system.

The The internal structure of the currently used composite cables has a PPR line through which the fluid passes, a material applied to this with adhesive properties, one applied to this adhesive material Aluminum foil, a material applied to this aluminum foil with adhesive properties as well as an applied on this adhesive material protective Outer coating. The aluminum foil is made according to the standards glued onto the small wall thickness PPR line, and finally the product is completed by a thin coating is applied, and then it is put on the market.

In the practice can Composite cables and extension parts by socket welding be combined. While this process must the PPR outer coating and the aluminum foil are peeled off and removed to allow the To perform the combining process. In this way, the total wall thickness becomes the standard conduit wall thickness brought without foil. Otherwise, there will be a compatibility issue with the extension parts.

at The existing systems will be aluminum foil, following their own Combination with the extension parts due to the risk of having the wire through between the film and the plastic material penetrates pressurized water, within the total wall thickness closer on the outer layer produced. This means that the inner layer is made with a size which conform to the pressure of the standards can.

at these approaches are in the context of interconnections It is imperative to insert the end section of the pipe through Pull off the puller tool for compatible operation with the fasteners to ensure, whereby material and time are lost. There is also the possibility of working mistakes. Another disadvantage of this approach is in that it takes a lot of time to relocate the system because of the welding preparation a time consuming one Process is.

It is inevitable that the said PPR line has a greater total wall thickness so that it absorbs the pressure to which it is caused by a possible Ingress of fluid under pressure between the conduit and the aluminum foil, following the connection process. This leads to overuse on plastic raw material and aluminum foil.

Task of invention

On Basis of the known prior art, the invention is the Task based, the existing disadvantages by improvements of products used in sanitary systems and are known as multilayer composite lines.

It It is another object of the invention to provide a conduit with a standard utility diameter to create without it being necessary, while connecting the interconnections the layers of outer coating and remove the aluminum foil. In this way it is possible since it is no longer necessary to carry out the stripping processes which Aluminum foil and the outer coating to accommodate within the entire thickness. Accordingly, a Main part of the oxygen-permeable connecting part so present that he is covered with the aluminum foil.

Around to solve these tasks were on the multilayer composite lines, which against pressure and Corrosion resistant are and in sanitary systems be used, made improvements, these wires over at least an inner pipe with low oxygen permeability and at least one on this inner line applied aluminum foil have, with a heat expansion coefficient, which is lower than that of the inner pipe.

According to a preferred embodiment of the invention, the aluminum coating in the To fix extension part together with the inner pipe, without deducting this coating during connection of the composite line by extension parts, at least one filling cavity in the form of a channel present, which makes it possible to scrape the surface of the visible at the end portion of the composite aluminum coating, and inside the plastic to leave and embed in it, and replace the scraped volume by filling with plastic material. In this way it is possible to connect composite lines without the aluminum foil would be deducted. This minimizes the amount of material and time required. Also, work errors are reduced during the line connection process. In addition, the time required for the welding preparation is shortened, and the line layout process is accelerated.

A Another preferred embodiment of the Invention is characterized in that the outer diameter the interconnector corresponds to that of a standard flat cable. Demge- According to will preferably uses a socket welding the connecting parts, without requiring a process to directly strip any surface would. There the aluminum foil is not deducted, one of the welding length corresponding Part in the connecting part. In this way, the main part the oxygen passing extension part through aluminum foil covered. As a result, oxygen diffusion is in the extension part greatly reduced. Since there is no scraping (removal) of the surface, is a waste of plastic and aluminum foil, what to do during a Removal process would come prevented. Accordingly corresponds the total wall thickness of the wall thickness of a standard cable without foil. As the scope according to which the Aluminum foil is reduced, is also the consumption amount reduced. this makes possible it, a waste of excessive quantities to avoid plastic raw material. Because the aluminum foil up brought close to the center of the interconnector, both show the outside as also the inner layer corresponding resistance to expansion. Accordingly, the adhesive transfers on the aluminum foil that of both the inner and the outer layer stemming expansion forces in the same way on the film. So the power is divided in two. However, at the existing system, only glue sticks the inner layer of a force. As a result, the front pipe surface is present that they are orthogonal to the axis and the aluminum foil receiving zone runs, to be recessed along the entire circumference.

A Another preferred embodiment of the Invention is characterized in that the diameter of the inner pipe is reduced to those located inside the interconnector Aluminum foil at more interior locations within the wall thickness of To place the interconnector.

Another preferred embodiment of the invention is characterized in that a coating is obtained by filling said filling cavity with plastic material, preferably using a perforated plate, in order to avoid the risk of the composite conduit being torn by a fluid under pressure following the bonding process between the inner pipe and the aluminum foil penetrates inside the composite pipe, wherein the line welding operation is performed on the composite pipe. So there is no technology for producing the aluminum foil 3 closer to the outer layer within the entire conduit wall thickness, as a solution against the risk of the composite conduit cracking due to pressurized water entering between the extension members and the plastic material.

description the drawings

1a Figure 11 is a perspective view of a disassembled composite conduit according to a representative application of the invention.

1b FIG. 12 is a perspective view of the composite conduit according to a representative application of the embodiment. FIG.

1c Figure 3 is a sectional front view of the composite conduit according to a representative application of the invention.

2 Fig. 3 is a side sectional view of an example of a plate according to a representative application of the invention.

1

inside line

2

adhesive layer

3

aluminum foil

3.1

filling cavity

4

external coating

5

plate body

5.1

vent hole

5.2

Line support boss

detailed Description of the invention

The embodiment of the invention shown in the figures is represented by sectional views of a composite conduit used at various temperatures and pressures in plumbing work. According to the 1a it is, thanks to a filling cavity 3.1 in form of Channel, possible, the visible at the end part of the composite line surface of the aluminum coating 3 and to leave them inside the plastic and embed them inside, and to cover the scraped volume by filling with plastic material around the aluminum coating 3 together with the inner pipe 1 be placed inside an extension without the coating during the connection process for the composite line by means of the extension parts, which is preferably done by a welding process, would deduct. In this way it is possible to connect composite cables without the outer coating 4 and the aluminum foil 3 would be deducted. This minimizes the amount of material and time required. Also, work errors during the line connection process are reduced. In addition, the time required for the welding preparation is shortened, and the line layout process is accelerated.

This composite line is characterized in that the outer diameter corresponds to that of a standard flat cable. Accordingly, socket welding is preferably used on the connection parts without requiring a direct stripping process on any surface. Because the aluminum foil 3 is not deducted, enters the length of the welding corresponding part in the connecting part. In this way, a major part of the oxygen-permitting extension part becomes through the aluminum foil 3 covered. As a result, oxygen diffusion in the extension part is greatly reduced. Since there is no scraping (removal) of the surface, there is a waste of plastic and aluminum foil 3 , as occurs during a peeling process prevents. Accordingly, the total wall thickness of the wall thickness corresponds to a standard line without foil. As the scope is reduced, over which the aluminum foil 3 is wound up, the consumption is reduced. This makes it possible to avoid wasting excessive amounts of plastic raw material. Because the aluminum foil 3 is brought close to the center of the composite line, both the outer and the inner layer corresponding mechanical resistance to expansion. Accordingly, the adhesive transfers 2 on the drum 30 the expansion forces, as they come from both the inner and the outer layer, in the same way to the film. So the power is divided in two. However, in the existing system, only the adhesive on the inner layer is subject to a force.

The diameter of the inner pipe 1 is reduced to the located in the composite aluminum foil 3 to place at several internal points inside the wall thickness of the interconnector.

The insulating coating is obtained by the said filling cavity 3.1 is padded with plastic material under the preferred use of a perforated plate, to avoid the risk that the composite line tears under pressurized fluid, following the connection process in the interior of the composite line between the inner line 1 and the aluminum foil 3 penetrates, wherein in the composite line preferably a line welding is performed. So there is no technology for producing the aluminum foil 3 closer to the outer layer within the entire conduit wall thickness, as a solution against the risk of the composite conduit cracking due to pressurized water entering between the extension members and the plastic material.

Plastic material is filled into the recessed zone during the execution of the socket welding. Thus, the visible in the front section aluminum foil remains within the plastic, and the risk of water leakage through the aluminum foil is eliminated. It is possible to minimize user error, if preferred in the 2 shown plate is used to connect the composite lines obtained by said method, thanks to the ability to use existing in this process plates. Accordingly, the front portion of the composite conduit, during the formation of the channel 3.1 Smoothed, made by a certain amount of scraping.

The aluminum foil 3 is scraped from the front part of the composite line in a manner to remove a certain amount. Although it is possible to use existing plates during socket welding, which is preferably used to connect the composite leads, a heater plate with a vent hole may also be used 5.1 and a lead 5.2 used in their interior to mini mieren possible user errors. If the plate 5 is preferably used in said hot-wire welding, there is a hole 5.1 to make sure that trapped air escapes inside. Thanks to this hole 5.1 It is safe for the user to connect the power cord to the bottom of the plate 5 suppressed. There is a lead 5.2 to carry the plate from the inside. Thanks to the presence of the projection 5.2 molten material becomes the inside of the channel 3.1 passed, and it prevents the formation of a lip when the user presses excessively.

During connection of the lines, the composite line is scraped off at its front. Meanwhile, a very small amount of fillers is removed to form a channel 3.1 for picking up the aluminum foil 3 to build. During the preferably used socket welding process is molten plastic material in the channel 3.1 filled, and it covers the aluminum foil 3 ,

The The invention is not representative of those given in this section Restrict applications. Based on the scope of the claims, alternative embodiments may be made by those skilled in the art getting produced.

Summary: The invention is a pressure and corrosion resistant multilayer composite conduit used in sanitary systems and having at least one internal conduit (FIG. 1 ) with low oxygen permeability and at least one on this inner line ( 1 ) applied aluminum foil ( 3 ) whose pressure or heat expansion coefficient is lower than that of the inner pipe ( 1 ), wherein, to the aluminum coating ( 3 ) together with the inner pipe ( 1 ) inside an extension part, without peeling off the coating, at least one filling cavity ( 3.1 ) is provided in the form of a channel enabling the surface of the aluminum coating recognizable in the end part of the composite pipe ( 3 ) and to leave them embedded inside the plastic, and to cover the scraped volume by filling with plastic material.

Claims (4)

The invention relates to multilayer composite pipes, which are resistant to pressure and corrosion and are used in sanitary systems, with at least one inner pipe ( 1 ) with low oxygen permeability and at least one on this inner line ( 1 ) applied aluminum foil ( 3 ) having a coefficient of thermal expansion lower than that of the inner pipe ( 1 ), wherein: - at least one filling cavity ( 3.1 ) in the form of a channel which makes it possible to identify the surface of the aluminum coating ( 3 ) and to leave them in the interior of the plastic and embed in it, and to cover the scraped volume by filling with plastic material to the aluminum coating ( 3 ) together with the inner pipe ( 1 ) to be fastened inside an extension part, without removing the coating during the connection process for the composite line by means of the extension parts, which is preferably done by a welding process. Multilayer composite line according to claim 1, characterized characterized in that the outer diameter the composite line to the outer diameter of a standard flat cable equivalent. Multilayer composite line according to one of the preceding claims, characterized in that the diameter of the inner line ( 1 ) is reduced to the aluminum foil located inside the composite line ( 3 ) at several internal locations within the wall thickness of the interconnector. Multilayer composite line according to one of the preceding claims, characterized in that a coating is obtained in that the filling cavity ( 3.1 ) is preferably filled using a perforated plate with plastic mate rial, in order to avoid the risk that the composite line ruptures by pressurized fluid, which following the connection process in the interior of the composite line by preferably a line welding used in her between the inner line ( 1 ) and the aluminum foil ( 3 ) penetrates.