DE8428374U1 - PLASTIC PIPE TO RENOVATE PIPELINES - Google Patents

Description

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PATENTANWÄLTE gadderbaumer strasse 20 \

DIPL-ING. BODO TMIELKING |;

DIPL.-ING. OTTO ELBERTZHÄGEN ^ ζκΐπΐΐΐIZ ^ ^^ V

POST CHECK ACCOUNT: HAN 309193 * 302 jf

LEGAL FILES: 13 396 Fft

date: September 24, 1984 / |)

Applicant: Wiik & HÖglund GmbH, Schwartäüer Allee 8 a, 2400 Lübeck 1

Plastic pipe for the rehabilitation of pipelines

The innovation concerns a plastic tube for insertion in Existing defective pipelines, which consist of pipe sections connected to one another.

It is known to repair defective pipelines, |

In particular, from concrete sewer pipes, to insert pieces of plastic pipe into the defective sewer pipes and these to be welded together. Such a renovation cannot be carried out everywhere. Welding with the help of a Welding machine requires an excavation and thus considerable earthworks.

The innovation is based on the task of making a piece of pipe to create composite pipe that can be used without creating special construction pits, i.e. without complex civil engineering work, can be drawn in through the manholes.

The solution to this problem is, according to the innovation, that the pipe sections are inserted into one another at the ends, with the one end each has an inner socket area, the outside of which is flush with the adjoining pipe area, and a reduced compared to the adjacent pipe area Has wall thickness, with the other end a

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September 24, 1984

outer paragraph has., the outer diameter of which is smaller is than the inner diameter of the socket area. the Pipe sections are comparatively short so that they can be introduced through the manholes.

In a preferred embodiment of the innovation, it has proven to be useful between the sleeve area and paragraph of adjacent pieces of pipe electrical resistance was; - / wires to be provided for welding the connection area.

Such an arrangement allows a safe, liquid-tight Connection between the tube pieces without the use of a special welding device is. The resistance wires remain in the connection area and are lost.

According to a further feature of the innovation, there is a circumferential section in the vicinity of at least one end of a pipe section Annular groove and at least one seal between the nested pipe pieces are provided.

It is advantageous that the circumferential annular groove is provided on the outer shoulder and the seal is a rolling ring seal is.

The more recent plastic tube allows a simple Rehabilitation of defective sewers without complex civil engineering measures. The insertion of the pipes or Pipe sections can be made from the existing manholes.

1384

A preferred embodiment of the The innovation is described in detail using the drawing. Show it:

Figure 1

Figure 2
Figure 3

a partially sectioned side view of a pipe section,

the detail at II. in Figure 1 in section,

the detail in III. according to Figure 1 in section.

The total length L of the pipe section shown is arbitrary selectable. However, it is kept comparatively short in order to be able to insert the pipe sections through the sewer shafts. A practical length could be about 1 meter.

A pipe according to the application consists of several of the pipe sections 1 shown in FIG. 1.

The pipe section has at its left end according to FIG is formed flush with the adjoining pipe area. The wall thickness of this socket area is because of the inner heel less than the wall thickness of the middle Rohrberei.chs.

The right end according to FIG. 1 is what is known as a pointed end, which is formed by an outer shoulder 3. Of the The outer diameter is smaller than the inner diameter of the associated socket area of the adjacent pipe section. The pipe sections can therefore be pushed into one another and lie at the joint with their inside as well

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September 24, 1984

also essentially flush with their outside.

Two fixing slots 4 and 5 are used to fix the various Pipe pieces and allow a solid / in Compression of adjacent ones in the axial direction Pipe sections.

At the spigot end 3 a bevel 6 is provided, dia a simple insertion of the spigot into the adjacent socket area 2 allowed. The buffer area 2 has a Phase 7.

In the socket area 2 or on the outside of paragraph 3 electrical resistance wires 8 are provided circumferentially. When installed, these serve to heat the neighboring one Plastic area. Weld by heating the adjacent pipe sections at the connection points in a liquid-tight manner with one another.

In the embodiment shown, there is an annular groove 9 provided on paragraph 3 of the spigot. In this annular groove 9 is a rolling ring seal 10. In various It may be useful to use a rolling ring seal for certain applications and to provide welding wires for welding.

Claims (4)

1. Plastic pipe for insertion into existing defective pipelines, which consists of pipe pieces connected to one another, characterized in that the pipe pieces (1) are plugged into one another at the ends, each end having an inner sleeve area (2), the outside of which is flush with the adjoining one Pipe area and one opposite to the adjacent pipe area verr. has an increased wall thickness, the each other end has an outer shoulder (3), the outer diameter of which is smaller than the inner diameter of the Socket area (2). 2. Plastic pipe for insertion into existing defective pipelines, which consists of interconnected pieces of pipe, characterized in that the Pipe sections (1) are plugged into one another at the end, each end having an inner socket area (2), the The outside flush with the adjoining pipe area is not less than that of the adjacent pipe area Has wall thickness, the other end having an outer shoulder (3), the outer diameter of which is smaller than the inner diameter of the socket area (2), with between Socket area and shoulder of adjacent pipe sections, electrical resistance wires (8) for welding the connection area are provided. Ii I ff I i \ i i i ti t it ti * » · f « 13 3? P September 24, 1984 / r 3. Plastic pipe according to claim 1 or 2, characterized in that in the vicinity of at least one end of a pipe piece a circumferential annular groove (9) and at least one seal is provided between the pipe pieces pushed into one another. 4. Plastic pipe according to claim 3, characterized in that that the circumferential annular groove (9) is provided on the outer shoulder (3) and the seal is a rolling ring seal (10).