DE1944370A1 - Prefabricated, thermally insulated construction, container or conduit element, especially insulated pipe - Google Patents

Description

The invention relates to a gate fabricated, thermally insulated Construction, container or line element, in particular insulated pipe, with one more or less heat-conducting wall section, a casing arranged at a distance from it, and with a layer of foam material, which is inserted or manufactured in the space on the spot

At isolated! Pipes, in particular for heat supply systems for larger areas, it is common knowledge Divide such pipelines out because S is a piece an ordinary steel pipe aentrally in a jacket, for example, made of plastic pipe with a relatively large

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Diameter, brought and the space around the steel pipe with a suitable heat-insulating tree material, such as polyurethane foam, is filled. The foam materials that are commercially available have one limited thermal resistance, and in heating systems operating at high temperature a certain amount often occurs Burning of the foam material makes it brittle and becomes weak and also less resistant to the ingress of condensation or steam.

It is an object of the invention to provide a composite element that addresses these disadvantages avoids or keeps it as low as possible »

This object is achieved in that iß the gap a layer of mineral fibers or a corresponding heat-insulating material opposite the wall section is arranged while the sobaummaterial in the space between the casing and the surface the Sobioht from Paeertoaterial is that the Sheath opposite.

The hottest zone in the pipe by means of a perfectly insulating, in relative insulates small amounts of the material used, as it is the innermost insulation layer with little circumferential expansion forms. The cheap solid tree material fills the larger space between the fiber material and the jacket, see above that the pipes with good strength and good catering

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being able to be established. In addition, in the border area between fiber and foam there is a certain amount Reinforcement effect achieved, so that this Grenzbereioh shows a greater strength, which to a certain extent compensates for the loss of overall compressive strength caused by the use of a relatively soft layer Fiber material is conditional.

A special feature of the invention is that fiber material in the known form pressed and / or Prefabricated pipe shells made of glass wool and the like. Can be used, since a special effect is achieved here. In these bowls and especially in their surface, different plastics, such as Pfaenol plastic, used as a binder for the fibers at least in larger quantities than in the case of fiber mats, and is fcerial in the boundary area between fibers and tree dimensions An extremely firm and dense layer can be observed, which is caused by the copolymerization of the plastic due to the Influence of the heat that is generated by the foaming and curing of the Sohaummaterials, such as the z. B. is known for polyurethane foam. The insulating shells are a little more expensive than the mats, but they are easier on to apply the inside of the pipeline before inserting it into the jacket pipe, and they make it possible to use pre-insulated pipes to produce high quality.

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The invention also relates to methods of manufacturing the above-mentioned pipelines or other? Elements. This inventive method exists in that there is a consistency of mineral fiber material with a suitable, thermosetting plastic substance impregnated or coated, close to the wall section is brought, and that then foam material in the space between the layer and the casing is introduced during simultaneous or subsequent heat treatment of the plastic substance.

The heat treatment of the plastic does not necessarily have to be done with the aid of the heat generated by the foam done, but it makes processing much easier.

According to the invention it is also possible to cover the surface of the fiber material with an additional plastic substance after the fiber material is brewed in place on the wall section, however before the jacket is brewed in place for subsequent foam introduction. It makes it easy to paint the plastic substance on the surface of the fiber material.

For example, if polyurethane foam is used, the temperature rises to approximately 130 to 140 ° C, and

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that praises, phenolic plastic la ode? to cure on the fiber material, so that a hard and dense surface is formed is formed with a thickness of about 3 to 7 mm.

The shells are preferably used as pipe parts that are split in the longitudinal direction only on one side. As it is usually desired, the inside the pipeline with spacers arranged at a distance from one another for centering the pipe in which the To sift the casing pipe forming the casing, the soles made of pasermaterial can additionally hold them Spacers used between their ends to so automatically to create a suitable spacer between the spacers.

In order to completely encase the fiber material in order to prevent water from penetrating along the inner tube, it is two-way to make the fiber material some To end centimeters away from the ends of the jacket pipe and to fill this end section completely with foam material to create end walls made of dense material to accomplish. If the pipe is stored or transported in a damp environment, no water will get into the Fiber material.

The invention is not limited to use in tubular elements, since in particular the

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Formation of the hardened Oberfläohe the Fasersohioht advantageous auob z. B. can be used with composite wall elements.

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Claims (4)

19U37Q Expectations M .J Prefabricated, heat-insulated construction, container or conduit element, in particular an insulated pipe, with a more or less heat-conducting wall section, a casing arranged at a distance from it, and with a layer of foam material that is used in the space on the spot or in it is produced, characterized in that in the intermediate a layer of mineral fibers or a corresponding heat-insulating material is arranged opposite the wall section, while the foam material is in the space between the casing and the surface of the layer of fiber material opposite the casing . 2. Construction according to claim 1, characterized in that the layer of fiber material is impregnated with hardened plastic at least opposite its surface facing the foam material. 3. A method for producing a construction according to claim 1, characterized in that a layer of mineral fiber material which is impregnated or loaded with a suitable, thermosetting plastic substance ^{SL / Si} 0 0 9 8 11/0459 194437S striohen has been brewed close to the wall section is, and that then foam material in the space between the pushes and the casing at the same time or subsequent heat treatment of the plastic substance is buried. 4. The method naob claim 3, characterized in that a Sobaummaterial is used which generates considerable heat of reaction during foaming or curing, and that a plastic substance is used which is cured by the influence of the heat of reaction. 5. The method according to claim 4, characterized in that the fiber layer is applied to "fsa Wertiiangeabsohnltt, that the surface of the fiber layer is coated with the plastic substance, that the coating is applied essentially parallel to the Ysndungsabschnitt at a distance from the surface of the fiber layer, and that foam material is introduced into this space. 009811/0459