DE1984868U - DISTRICT HEATING PIPE WITH THERMAL INSULATION JACKET. - Google Patents

Description

Dip! - Ing. H. B. KAHLER ■ Dr.-Ing .-. W. STRONG PATENT LAWYERS

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4-15O Krefeld · Moerser Straße 14O · Fernruf (O 21 51) 2O4 69

Date: 11 "1" 1968

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.Stadtwerke Dinslaken G.m «b.H. , 422 Dinslaken, Gasstrasse 1

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Jipfinding concerns a district heating line with thermal insulation, plastic material being used as the insulating material.

The usual thermal insulation τοη district heating cables consists in., that the insulated heating pipes are laid in special channels. This type of insulation is, however, burdened with high costs and also requires long construction times,

In order to eliminate these disadvantages, new insulations have been developed in recent years, in which the district heating lines are laid directly in the ground, i.e. without special ducts _. the protective skin insulation j the hard jacket insulation as well as the dry bulk insulation "With all of these types of insulation it is important to achieve a high level of thermal insulation and optimum protection against penetration of groundwater and strata water into the insulation material with the lowest possible ost"

Deutsche Bank AG 1Ο3 / 1535 Krefeld · Postal check Essen 4-Ο55

The "known types of insulation that largely meet the requirements mentioned are generally so expensive that they even reduce the cost of the canal from certain bore sizes onwards. construction method. The invention is therefore an object Basically j to create insulation for district heating lines ^ with which, while reducing the total costs, the thermal insulation can be improved compared to the known insulation *

According to the invention, the district heating pipeline is _s "embedded in a pandierten from vorex- polystyrene Ieliehen in the size range from about 0 3 to 6 mm existing or containing, bound-insulating" One may in this case a hard coat insulation or 3 which is generally preferable, a Elastikmantel- insulation provide*

The construction as elastic jacket insulation is achieved in that the styrofoam particles, optionally with the addition of additives such as, for example, clay ₃ ash, sand or the like, are set with a hardenable adhesive or with hardenable liquid adhesive compounds, so that after hardening or »Outgassing of solvents creates the elastic insulating jacket» As liquid or plastic adhesive masses or sr. Glues can be plastic-based, paints _3, bituminous materials or other binders, such as eg. Water glass can be used. The thus formed insulating body reaches a _{.Baumgewicht}} which is still below the tree by weight of a hard coat isolation (light-weight concrete), and about 50 to 300 kg / cbm is "the insulating body is very elastic, and in contrast to the

known hard jacket insulation, largely insensitive to breakage * The thermal conductivity of the insulating body can be up to 0 _} 04 kcal / m h ° C.

If, on the other hand, the thermal insulation is to be designed as a hard jacket insulation, the styrofoam particles are coated with cement, possibly with the addition of sand, to a lightweight concrete processed »Due to the very low specific weight

or the styrofoam, the lightweight concrete has a weight of / below 300 kg / cbm. A lightweight concrete with such a low volume * - weight has exceptionally good insulation properties / coefficient of thermal conductivity in kcal / mh G is below that of the known hard-jacket insulation; with a skin weight of 350 kg / cbm it is ₉ 08 kcal / mh ° C _o

Lightweight concrete made of cement and styrofoam is in the construction industry, but not known in district heating pipeline construction *

To clarify the thermal insulation for district heating lines according to the invention, reference is made to the drawing, in which in a trench 2! District heating lines 3> t ^ nd can be seen 5 which are provided with a glass wool sheath 5 and in a common _s, preferably elastic insulating body 6 lie"

The insulator 6 "consists of polystyrene particles of 0 _s 3 to 6 mm size ₂ are mixed, if appropriate with additives, _s such as ash, sand od. The like and by an adhesive, for" B "resin, bitumen, VJasserglas od. Like. Are bound to an elastic insulating compound.

Instead of 31astikmantelisolierung but also a rigid external insulation can be provided _s which, as mentioned above, from Styrofoam lightweight concrete.

The district heating lines lying in the insulating body can then be covered with a layer of sand, whereupon the trench is thrown in the ground »

Claims (1)

Expectations Λ, District heating cables with thermal insulation, whereby plastic material is provided as the insulating _{compound 3, characterized in that the district heating cable (J 5} 4-) is made of pre-expanded Styrofoam ropes in the size range of about O ₅ 3 to 6 mm or containing set insulating compound (6 ) is embedded. 2 »District heating pipe according to claim 1 _5, characterized in ₃ . that the thermal insulation is designed as a hard jacket insulation j that the styrofoam particles are processed with cement, possibly with the addition of sand or the like, to form a lightweight concrete known per se, 3 * District heating pipe according to Ansjxcxich. 1 _s characterized in that the thermal insulation is designed as a Slastilnnantelisolierung 5 that the St'yropor-Seilchenj optionally with the addition of additives _? such as. Lime, ash, sand or the like * are mixed with a hardenable adhesive or hardenable liquid adhesive mass.