DE1941140U - INSULATING PIPE. - Google Patents

Description

DR.-ING. H. FlNCKE
DIPL-ING. H DRILL
DIPL.-ING. S. STAEGER

May 18, 196

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Arthur Meier-Schenk Zurich ^ Switzerland)

Insulating tube

The present innovation relates to an insulating tube for long-distance lines consisting of a protective tube which coaxially encloses a heat transfer pipe with a gap, the gap between the two pipes is filled with a heat-insulating material, in which the heat transfer pipe is heat-insulated and shock-proof is embedded.

The laying of pipelines in cement aid, which is still common today channels, as well as the careful sealing of the same against the effects of moisture Experience has shown that it takes about 200 minutes per running meter. In addition there is the working time

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for the thermal insulation to be carried out on the construction site, from approx. 20 minutes per running meter.

The elimination of auxiliary channels could result in considerable investment costs The previously so economical centralized large-scale heat generation plants for the creation of these channels are saved that had to be created wherever the pipeline network had to be laid in the terrain between free-standing buildings was. The fact that heat transport lines that can be laid directly in the ground, on the other hand, have considerable advantages through the savings and the Experts knew that construction methods had to have faster construction methods than conventional methods with auxiliary ducts, but it was missing The insulating pipes, which are also the case with such direct installation in the ground in terms of strength, insulation and moisture protection in the case of stretching, changes in terrain and water ingress the desired and provide the necessary security.

Such a tube now forms the subject of the present innovation. It zeinhnet by the fact that the protective tube by itself known, seamless armored pipe of production length, i.e. of a length of up to 12 m, preferably 6 m, and the gap homogeneous and seamless thanks to a self-adhesive polyurethane foam that is introduced in liquid form and foamed in the gap is filled, the one on the inner wall of the armored pipe

and adheres to the outer wall of the heat transfer pipe «

The insulation tube according to the innovation not only guarantees the required Security but it enables a much cheaper installation compared to the type of installation with auxiliary ducts A saving of up to 90 $ in working time is achieved compared to the conventional type of laying, but is reduced with the modernization Insulating pipe the laying time to approx. 10 to 20 minutes per meter of pipeline. The insulation tube according to the innovation can be factory-made prefabricated, delivered directly to the construction site and immediately laid in the prepared trench. The education Armored pipes used for the protective tube, made of tough, tough polyethylene, which is particularly advantageous here, are in the specified lengths commercially available and can be used immediately and unchanged for the production of the insulation tube according to the innovation, which is low Production costs guaranteed. The specified lengths have also proven themselves because they do not require transport or handling to make the pipes more difficult, to keep the number of connections to be made at the installation site low.

The seamless, homogeneous filling of the space with the too known self-adhesive polyurethane foam that adheres to the protective tube and the heat carrier tube results in addition to the flawless Insulation, a durable, resistant and high-quality composite construction with no cracks or gaps through them Moisture can penetrate. Without such a composite structure

condensate would form between the insulation and the non-adhering part of the pipe, e.g. the inner wall of the protective pipe successively over the years supported by relative displacements as a result of thermal expansion leading to the destruction of the Over time, however, moisture-saturated insulation leads to a significant deterioration in the insulation effect.

The drawing shows an example of an embodiment of an insulating tube according to the present innovation. It shows :

1 shows a partial length of the insulating tube in side view, and FIG. 2 shows a cross section through the tube along the line II-Π of Fig. 1.

The insulating tube shown consists of a heat transfer pipe 1, which is arranged coaxially in a protective tube formed by a seamless armored tube made of metal or plastic, the inner diameter of which the outer diameter of the heat transfer pipe 1 to Multiple exceeds. This creates an annular space 3 between the pipe 1 and the armored pipe 2, which is completely and homogeneously with is filled with a foam-shaped insulating material.

Through this double jacket 3, 2, the heat carrier pipe 1 or its contents is not only thermally insulated from the outside and protected against impacts, but thanks to the seamless design of the armored tube 2, the insulating tube shown is also vapor-tight.

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It is therefore particularly suitable for direct installation in the ground of hot water pipes, hot water heating pipes, but also for coolant lines and steam lines, as far as in the latter Pail the steam temperature is not higher than for the foam, which surrounds the heat transfer pipe 1 is permissible.

It is also noteworthy that there are no parts anywhere, the heat and / or sound bridges between the heat transfer pipe 1 and the armored tube 2 could form.

In the manufacture of the insulating tube shown, a seamless Armored pipe of Pabaication length, i.e. of a commercially available length of up to approx. 12 m, preferably 6 m, which forms the protective pipe 2, the heat transfer pipe is pushed in coaxially, spacers 4 (Fig. 2) the correct position of the heat trä gerrohres within the protective tube guaranteed. These spacers 4 are made in one piece Manufactured heat insulating material and are with the two tubes 1 and 2 in frictional connection. They include that with a triangular shape Heat transfer pipe 1 in such a way that the triangular sides rest against the heat transfer pipe, with the triangular points extending approximately radially Struts rest with their free ends on the inner surface of the armored pipe 2. The system in the triangle sides allows it to be pushed on easily the sides of the triangle can easily give way and are clamped after the slide is finished.

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Thereupon, in the space 3 of the skeleton prepared in this way from parts 1, 2 and 4 from one end of the tube in one operation a known self-adhesive polyurethane foam introduced in liquid form and foamed homogeneously. The result is a seamless, homogeneous filling of this space with the insulation Forming foam adheres to both the armored pipe and the heat transfer pipe. The spacers 4 are also complete here encapsulated in the foam, with the exception of their contact surfaces, which are kept as small as possible, on the inner walls of the armored pipe 2 or on the outer walls of the heat carrier pipe 1.

Claims (2)

IA. 263126 * 18.5. PROTECTION CLAIMS 1. Insulating pipe for long-distance lines, best built from a protective pipe, which surrounds a heat transfer tube coaxially with a gap, the gap between the two tubes with a heat-insulating material is filled, in which the heat transfer pipe Is thermally insulated and embedded in a shock-proof manner, characterized in that the protective tube by a known, seamless armored tube (2) of manufacturing length, i.e. of a length of up to 12 m, preferably 6 m, and the gap is homogeneous and seamless by a liquid in the space foamed, self-adhesive polyurethane foam (3), which is known per se, is filled, which is on the inner wall of the armored pipe and adheres to the outer wall of the heat transfer pipe " 2. insulating tube according to claim 1, wherein for the coaxial support of the Heat transfer pipe in the armored pipe before the foam is introduced One-piece spacers made of heat-insulating material are used, which are in Reibverbinduag with both tubes, thereby characterized in that these spacers (4) with a triangular shape encompass the heat transfer pipe (i) in such a way that they with the triangular sides rest on the heat transfer pipe, with struts running approximately radially at the triangular points with their free ends on the inner surface of the armored pipe (2). γ PATEN I LAWYERS ~ '~ DR.-ING. H. FINCKE DIPL-ING. H. & OHR D1PL.-1NS. 8. SIAStER