SK113699A3 - Pipe bundle and manufacturing process thereof - Google Patents

Abstract

The arrangement has two or more plastic pipes (1a-1c) arranged adjacent to each other, and a sleeve (2) enclosing both pipes. The pipes are held together with a predefined degree of play between them and with respect to the sleeve. The pipes can be of equal or unequal diameters. An Independent claim is also included for a method of producing a composite pipe arrangement.

Description

Pipe bundle and process for its production

Technical field

The invention relates to a tube bundle with two side-by-side plastic tubes intended especially for cable ducts and a protective sleeve which envelops the two plastic tubes. In addition, the invention relates to a tube bundle with at least three mutually parallel plastic tubes intended especially for cable ducting and a protective sleeve which envelops the plastic tubes when the tubes are multilayered. The invention further relates to a method for manufacturing such a bundle.

BACKGROUND OF THE INVENTION

A plastic cable conduit unit is known, even with a plurality of conduit tubes which, when connected by flexible expansion bridges, are connected in the form of a mat, in particular for conduits in cable ducts. For example, in the field of telecommunications, cable ducts are conventional cable ducts for telephone cables, light-wiring cables, broadband cables and other modern cable systems, these cable systems being constructed as plastic pipes but may also consist of concrete, ceramics or the like. . Typically, such cable ducting units can also be placed directly in the ground. The cables are not only fastened in the cable ducts, but can also be fastened in the cable ducts through which they pass through the cable ducts.

There is known a cable assembly or a tube bundle in the embodiment described in the introduction, in which the protective sheath is glued or welded to plastic plastic pipes, only the materials placed next to each other in the form of a triangle are equally effective.

for two or three tubes z The adhesive connection between the protective sleeve and the plastic tubes is disadvantageous for various reasons. In particular, it is not good that no relative movement can occur between the individual plastic tubes within the protective casing. However, such relative movement, for example in the longitudinal direction of the tubes, must be unconditionally allowed due to the often and often considerable thermal difference and the resulting longitudinal extensibility, since otherwise the protective casing tears and subsequently causes considerable damage and / or considerable damage to the plastic casing. dimensional changes. This is the case with ordinary solar radiation and the resulting expansion reactions of plastic pipes. The formation of cracks and the tendency to damage the protective sheath take place in a tube bundle with at least two plastic tubes placed side by side, but also if the tube bundle is to be positioned within a certain bending radius and in particular a relatively small bending radius. The pipe on the outside must then always be laid over a longer distance than the pipe on the inside. In addition, cracks and considerable damage to the protective sleeve also arise when the tube bundle in a triangular multilayer design, for example in the case of three plastic tubes arranged in a triangle, is wound onto a cable drum, since then the plastic tube lying on two <

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The lower plastic tubes or the two upper plastic tubes placed on the lower plastic tube must always pass a longer winding path and the relative movement between the plastic tubes must also be maintained. However, this is made impossible by the adhesive connection between the protective sleeve and the plastic tubes. This results in extreme stresses that lead to the formation of cracks as well as considerable damage to the protective cover. Also problematic in this context is the fact that the tube bundle unwound from the cable drum undergoes a considerable overall twist, since it is precisely the equalization of movement between the individual cable tubes and the protective sleeve. The tube bundle twisted in this way can hardly be reasonably accommodated after being unwound from the cable drum. In any case, not without significant problems and costly balancing. Therefore, considerable deformation of the pipes must be eliminated. The same problems then arise when such a tube bundle is to be accommodated in relatively small radii of curves, since the protective sleeve also tears or severely damages due to the adhesive connection with the plastic pipes.

It is an object of the present invention to provide a tube bundle of the above-mentioned embodiment which can be stored, conveyed as well as being wound and unwound from a cable drum which can be laid in a straight direction as well as in curves with a small radius. to damage and / or deform the protective sleeve of the plastic tubes.

SUMMARY OF THE INVENTION

This object is achieved by the tube bundle described above with two side-by-side plastic tubes intended especially for cable ducts and a protective sleeve which envelops the two plastic tubes according to the invention, which is based on the fact that both plastic tubes are movement clearance with each other and with the protective cover held together by the protective cover.

These measures according to the invention result in the plastic tubes in the protective casing being movable relative to each other and to the protective casing, so that there is no longer any need to worry about twisting or deforming the tubes as the tube bundle is wound or unwound from the tube drum and / or deposited in arcs, and particularly small bending radii. The relative movement of the plastic tubes can occur not only in the longitudinal direction of the tubes, but also in such a way that the two plastic tubes can be stacked on one another or possibly at a height, possibly even taking an angled position relative to one another. With regard to the laying technique, this is the optimum tube bundle, in which the expansion of the tubes resulting from extremely fluctuating temperatures and the formation of cracks or damage to the protective cover cannot occur. Furthermore, there is no need to worry about twisting and the resulting corrective measures. Since still one plastic tube can give way to the other, both tubes can also be relatively movable relative to the protective casing. Surprisingly, the protective cover ensures the perfect cohesion of the plastic pipes placed with a predetermined movement clearance. Usually, it is also possible to use a spacer between the tubes for plastic pipes loosely coated with a protective cover. This achieves that the plastic tubes can move relative to the protective casing. However, this is only possible if during the fabrication - during the wrapping of both

And plastic pipes with protective wrapping - there is no way that the plastic pipes logically abut one another. Separation of the plastic pipes by means of spacers causes the protective cover to be larger than the volume, for example, of two adjacent plastic pipes, after assembly.

The invention further relates to a tube bundle with at least three mutually parallel plastic conduits for cable ducting and a protective sleeve which encapsulates the plastic conduits with a multilayer pipe installation according to the invention, which is characterized in that the plastic conduits are flat in a row they are placed close to each other and are held together by the protective sleeve by a predetermined attachment without an adhesive connection between the protective sleeve and the plastic tubes.

These measures according to the invention result in the plastic tubes in the planar position being held firmly in the protective wrapping which surrounds them and, as a cane mat, transported flawlessly. They can also be wound and unwound from a cable drum, for example, without the need to worry about twisting or other deformations. Nevertheless, the protective coating permits relative relative movement, particularly in the longitudinal direction of the tubes, so that the expansion of the tubes due to extremely fluctuating temperatures does not lead to the formation of cracks or damage to the protective coating, since the adhesive connection between the protective coating and the plastic tubes is not used. possible relative movement not only between the plastic tubes themselves, but also between the plastic tubes and the protective sleeve. If, on the other hand, it is desirable to place the tube bundle according to the invention in curves, and in particular in small or narrow bending radii, then the central tube or plastic pipes can be pushed out of the space between the outside plastic pipes. In this context, the invention is based on the finding that the volume of the protective sleeve is then significantly greater than the volume formed by the three plastic tubes when the three plastic tubes are placed in a triangular shape, but their placement on a flat guide leads to it is as if it were stretched so as to form a rigid fit of the plastic tubes, which are placed side by side in the protective packaging. This also applies if the flat guide is made of four or more plastic tubes and these tubes are made in a polygonal formation. There is also the following possibility: after the tube bundle has been laid in the arc, to connect to just the same arc when repairing the flat line fixed in the protective sleeve and thus to subsequently reconstruct the tube mat, push the middle plastic tube back between the two outer tubes. In this way, it is possible to obtain a tube bundle or a multilayer arrangement of tubes with resilient effect in the arrangement of plastic, mat, triangular or polygonal tubes. In this case, the protective cover is practically only an auxiliary package, in which the formation of the cracks does not matter, even though such damage is not at all to be feared. It should also be noted that the tube bundle according to the invention can also be easily plowed directly into the ground, optionally as a tube mat (grate) or in a triangular or polygonal arrangement.

Other essential measures of the invention are set forth as follows. In particular, the plastic pipes have the same outer diameter, for example five, seven, nine, etc. on one side. the plastic tubes in one protective container so that, on the other hand, a free protective container with a corresponding movement clearance between the container and the plastic tubes can be provided with a triangular or polygonal arrangement. Furthermore, the invention provides that the protective wrapper consists in particular of a transparent plastic film or a transparent film, so that a marking or a similar indication can be easily recognized on the individual plastic tubes, and a license plate is also available after they have been turned off. According to one proposal of the invention, which has a separate meaning, the protective cover or the plastic film, as a transparent shrink film, consists, for example, of PE-LD (Polyethylene Low Density). For example, the shrink film may be wrapped around the plastic tubes positioned to retain the heat-generating material when forming the protective wrapper; packaging and condensate flat conduits in a row shrink side by side and next to arranged by

Appropriate foil tunnel.

the shrinking water condensate could form no channel between the tubes.

This pipe bundle is guided in such a way that the protective sleeve is provided with perforations to escape out of the protective plastic for such a particular perforation, so that in case of possible damage to the foil by soil leaking rain water or rising ground water can again get out. Thus a drainage effect is obtained.

BRIEF DESCRIPTION OF THE DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be explained in more detail with reference to the accompanying drawings, in which: FIG. 1 shows a vertical section of a tube bundle with two side-by-side plastic tubes;

Fig. 2 shows the object of FIG. 2 with vertical plastic pipes;

Fig. 3 shows a modified embodiment of the object according to FIG. 1;

Fig. 4 is a vertical cross-sectional view of a tube bundle with three plastic tubes in a flat position with a protective cover;

Fig. 5 shows the object of FIG. 1 in a triangular arrangement of plastic pipes with a movement clearance between the plastic pipes; and FIG. 6 shows the object of FIG. 2 with the plastic tubes lying close to each other in a triangular form and with a movable clearance between the protective sleeve and the three plastic tubes.

DETAILED DESCRIPTION OF THE INVENTION

In FIG. 1 to 3, there is shown a tube bundle with two plastic tubes 1 arranged parallel to one another and intended, in particular, for cable ducts. The two plastic tubes 1 are wrapped with a protective cover 2. Furthermore, the two plastic tubes 1 are held together and, in the protective cover, with a protective cover 2 with a given movement clearance.

The two plastic tubes 1 may have the same outer diameter (FIGS. 1, 2) or also a different outer diameter (FIG. 3), but there may still be relative movement between the two plastic tubes 1 and the protective casing 2. The protective cover 2 consists in particular of a plastic film, for example a transparent plastic film.

In FIG. 4 to 6 shows a tube bundle with three plastic pipes 1 arranged parallel to one another, intended in particular for the cable duct and the protective sleeve 2 enveloping the plastic pipes 1 in a plurality of tubes. The plastic tubes 1 according to FIG. 4 are placed adjacent to each other so as to form a flat guide with the protective sleeve 2 and are held together at a given mounting without an adhesive connection between the protective sleeve 2 and the plastic pipes 1. The plastic tubes 1 have the same outer diameter. The protective cover 2 consists of a transparent plastic film. According to an exemplary embodiment, the plastic film 2 is formed as a PE-LD shrink film and has perforations 3 highlighted.

To accommodate the flat conduits of the three tubes 1 fixed in multiple layers by the protective plastic wrap 2 at given bending radii, the middle plastic tube 1b is formed out of place when forming a triangular plastic tube bundle with plastic tubes 1a, 1b, 1c. between the two outer tubes 1a, 1c with a loosely wrapped protective sheath. This is shown in FIG. 5 and 6, wherein FIG. 6 emphasizes that the adhesive connection between the plastic tubes 1 and the protective sleeve 2 is missing, that is, the protective sleeve 2 is glued or welded to the plastic tubes 1. In order to repair the flat guide fastened in the protective casing 2 and thus the mat composed of three plastic tubes 1, the middle plastic tube 1b can be pushed back again between the two outer plastic tubes 1a, 1c, so that the shape is then recovered FIG. 4th

According to an exemplary embodiment, the tube 1 also consists of polyethylene. Thus, it is a thermoplastic, acid and alkali-resistant olefin-based plastic, but of course other tubes of plastic may also be used within the scope of the invention so that virtually every type of plastic tube is included.

Claims (9)

PATENT CLAIMS A tube bundle with two side by side plastic pipes intended especially for cable ducts and a protective sleeve which envelops the two plastic pipes, characterized in that the two plastic pipes (1) are provided with a given movement clearance (S) with each other and with the protective cover (2) held together by the protective cover. A tube bundle with at least three mutually spaced plastic conduits (1) for cable ducting and a protective sheath (2) which envelops the plastic conduits (1) in a multi-layer pipe arrangement, characterized in that the conduits (1) They are placed close to each other and are held together by a protective cover (2) without an adhesive connection between the protective cover (2) and the plastic pipes (1). Tube bundle according to claim 1 or 2, characterized in that the plastic tubes (1) have the same or uneven outer diameter. Pipe bundle according to one of Claims 1 to 3, characterized in that the protective cover (2) consists of a transparent colored, black or white plastic foil. ww / J Pipe bundle according to one of Claims 1 to 4, characterized in that the transparent plastic film or the protective cover (2) consists of a shrink film. Tube bundle according to one of Claims 1 to 5, characterized in that the protective sleeve (2) has a perforation (3). Method for producing a tube bundle according to one of Claims 2 to 6, characterized in that at least three flat-conducting plastic tubes are aligned in a row parallel to one another and fixed in one protective package without an adhesive connection. Method according to claim 7, characterized in that the central plastic pipe or the medium plastic pipe in the case of a triangular tube bundle with plastic pipes is loosely arranged for the placement of flatly guided tubes in a plurality of layers fixed by the protective wrapper at given bending radii. wrapped in a protective cover, extruded from the space between the outer plastic tubes. Method according to claim 7 or 8, characterized in that, when reconstructing the flat conduit retained in the protective casing, the central or plastic plastic tubes are pushed back between the outer plastic tubes.