DE7908367U1 - REVERSE BEND MADE OF PLASTIC FOR PLASTIC FLOOR HEATING PIPES - Google Patents

Description

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Dr. Walter Nlelsch

Patent attorney SIrlusweg 43, 2000 Hamburg 65

Telephone: 504165

Plastic reverse bend for plastic underfloor heating pipes

INEFA-Kunst-toffe Aktiengesellschaft,

221 Itzehoe (Holstein), Brunnenstrasse 2-10

The present innovation relates to a reverse bend made of plastic for underfloor heating pipes made of plastic.

Recently, plastic underfloor heating pipes have found increasing use in construction as such an underfloor heating system can be operated with water heated to 45 ° and thus there is the possibility of using heat pumps, To use or to use solar cells, heat exchangers and the like.

The task of the present innovation is the laying of underfloor heating pipes made of plastic on the inversions to enable particularly fast and operationally reliable. This is to avoid that on the construction site critical and time-consuming bending work that leads to material fatigue, Lurchmesserverrung and thus lead to flow deterioration, must be carried out. Also, the reverse should be done with the plastic heater piping be connectable according to the usual polyfusion welding process. This object has been achieved in that this is a Specially industrially manufactured reverse bend made available which corresponds to the above-mentioned requirements rationalized and the operational safety increased significantly, especially at the reversal points in long-term use.

The object of the innovation is a reverse bend made of plastic for Plastic underfloor heating pipes, characterized in that outside the curvature of the plastic pipe at both ends a plastic welding socket is arranged in each case.

The innovation is illustrated by the accompanying drawings, Fig. 1, Fig. 2 and Fig. 3, clarified.

Fig. 1 is a perspective view of the reverse sheet 1, wherein the two straight pipe parts have the same leg length.

Fig. 2 also shows a perspective view of the return bend, however, the two straight pipe parts have an unequal leg length. In this embodiment after -ig. 2 is a preferred embodiment of the present innovation, since it results in the welding process and the necessary manual processing on the construction site with the one to be pushed into the plastic welding socket 2 Plastic underfloor heating pipe is made much easier and can therefore be carried out in a more time-saving manner, in order to then carry out the polyfusion welding perform.

Fig. 3 shows the plastic welding sleeve 2 in the opened state. Here is the reverse bend 1 with the plastic welding socket 2 connected by polyfusion welding. This is clear on the cylindrical inner surface of the plastic welding socket 2 bead-shaped ring 3 arranged approximately in the middle can be seen. This bead-shaped ring 3 ensures that the reverse bend 1 on the construction site the plastic underfloor heating pipe to be inserted when inserting up to the bead-shaped Ring 3 automatically moves into the best position for polyfusion welding. Furthermore, the bead-shaped Ring 3 has such a wall thickness that there is no narrowing of the inner cross-section at the connection points (polyfusion welds) entry. This means that the thickness of the bead-shaped ring 3 is a maximum of the wall thicknesses of the reverse bend and that to be welded in May have plastic underfloor heating pipes. However, it is preferred that the thickness of the bead-shaped ring 3 be somewhat smaller to

In one embodiment, the one that forms the return arc Plastic pipe has a mean outside diameter of about 20 mm

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ί | ■ + 0.5 mm and an inside diameter of about 16 mm + 0.5 mm.

So that the reverse bend is deformed according to the material and is operationally reliable is present, in the preferred embodiment the bending radius is in the range of about eight to ten times the diameter of the plastic tube forming the reverse bend 1.

In a further preferred embodiment of the reverse bend is the section B explained in FIG. 1 between the turns of curvature and the section A is the one that is currently running Plastic pipe parts arranged in a distance ratio of B 29 to 25 to A 14 to 18.

In a specific preferred embodiment of the reverse bend are the plastic pipe parts currently available by 1 to 2 plastic welding socket lengths shorter or longer.

In the preferred embodiments, the total length of the return bend including the plastic welding sleeves is 2 about 91 to 101.5 cm.

In the preferred embodiment of the reverse arc, the Plastic welding sleeves 2 designed as cylinders have a length of about 35 + 0.5 mm, an outer diameter of about ^ O + 0.5 mm and an inner diameter of about 20 + 0.5 mm.

Claims (10)

Dr. Walter Nielsch patent attorney Siriusweg 43,2000 Hamburg 65 Telephone: 504165 Protection claims: 1. reverse bend made of plastic for plastic underfloor heating pipes, characterized in that the outside of the arc curvature Plastic underfloor heating pipe a plastic welding sleeve (2) is arranged on each of the two 3 ends. 2. reverse bend according to claim 1, characterized in that the K-drist material welding socket (2) on the cylindrical inner surface a bead-shaped ring (3) is arranged approximately in the middle having. 3. reverse bend according to claim 1 or 2, characterized by that the reverse bend (1) with the plastic welding socket (2) polyfusion welded is present. 4. reverse bend according to one of claims 1 to 3, characterized in that that the plastic tube forming the reverse bend (1) has a mean outer diameter of about 20 mm + 0.5 mm and has an inner diameter of about 16 mm + 0.5 mm. 5. reverse bend according to one of claims 1 to 4, characterized in that that the bending radius of the return curve (1) is about eight to ten times the diameter of the return curve (1) forming plastic pipe has. 6. reverse bend according to one of claims 1 to 5, characterized in that that the distance (B) between the turns of curvature and the distance (A) of the two plastic pipe parts currently present in the distance ratio (B) 29 to 25 to (A) 14 to 18 are arranged. 7. reverse bend according to one of claims 1 to 6, characterized in that that the plastic pipe parts just present have different lengths. 8. reverse bend according to claim 7, characterized in that the plastic pipe parts just present by 1 to 2 socket shorter "or longer. 9- reverse bend according to one of claims 1 "to 8, characterized in that that the total length of the return "arch including the plastic welding socket (2) is about 91 "to 101.5 cm. 10. reverse bend according to one of claims 1 to 9, characterized in that the plastic welding sleeves (2) have a length of
about 35 + 0.5 mm, an outside diameter of about 30 + 0.5 mm and an inside diameter of about 20 + 0.5 mm.