DE29706933U1 - Composite pipe system - Google Patents

Description

Composite pipe rsvstem

Applicant

Sander GmbH & Co. KG System technology in concrete

On the Cliffs 25

32734 Detmold

Composite pipe system Description

The sewage systems installed today and in the past are in some cases suffering from major damage, which can lead to significant contamination of the groundwater and soil. In particular, the variety of wastewater discharged and its toxic composition have attacked the existing pipe networks in the past and thus caused damage. But static problems that exceed the load-bearing capacity of the pipes and installation errors have also led to the well-known damage patterns.

Composite pipe systems of various types have been known for several years (e.g. concrete/PVC-rigid composite pipes, so-called BKU pipes) and are used successfully in sewage systems. A disadvantage of these composite pipes is that during pipe production the so-called inliner can only be installed during the concreting process when making the concrete pipe. This manufacturing process, which generally corresponds to the standard of technology, with immediate demoulding can lead to the miner detaching from the fresh concrete, which impairs the functionality of the piping system.

The aim of the invention is to eliminate the above-mentioned disadvantages in order to produce an environmentally safe piping system that is resistant to many static load cases and many aggressive wastewater media. Furthermore, easy-to-lay, robust and absolutely tight piping and socket connections are to be created that ensure the safe transport of wastewater for decades. The invention arises from the protection claims and is explained in more detail below using the figures.

Figure 1 shows the longitudinal section from the pipe bell (1) to the spigot end (2) through the pipe body of the composite pipe system as well as the view into the composite pipe. A stoneware pipe (3) is arranged inside, which is milled off at the pipe ends (4). These milling points (4) ensure that the stoneware pipes, which are often glazed on the outside, are perfectly connected to the concrete or casting material (5). They also serve as a water barrier so that water cannot flow between the stoneware liner (3) and the concrete pipe (6) or casting compound (5) during socket tests of the pipe connections. Ceramic Keraline systems from KIA GmbH in Dülmen can also be used as liners. Partial linings with dry weather gutters can also be installed and cast.

The composite pipe system shown in Figure 1 also shows the external concrete pipe body (6), which is provided with a known socket connection, the so-called BK sealing system (7) (see utility model G 8900345.4). This sealing system (7), which is fitted at the factory to the pipe spigot end (2), protects the joint gap (Fig. 2 / 12) and the entire socket connection through its seat. Between the concrete pipe and the stoneware liner there is a cavity (8), which is completely sealed from sight or similar with casting compound (5), e.g. Ergelith from Hermes GmbH. This completely sealed

For example, grouting can also be carried out using easily swellable cement-based grouting materials (e.g. from Anneliese AG, Ennigerloh). This has the advantage that if moisture penetrates into the grouted cavity, the swellable components seal and close the leak, so that no environmental hazard is caused by exploding or infiltrating water.

This production has the following advantages:

The pipe bodies can be manufactured independently of one another without complex production processes, so that series production, which represents the current state of the art, can be maintained. The subsequent joining of the two pipe systems can be carried out quickly, so that no large storage is required. The cavity (8) between the two pipes is completely filled with grout after joining and alignment. This has the advantage that all fine pores that may be present in the pipe wall of the two pipe systems are closed and an absolutely tight composite system is created. In order to ensure that the pipes are manufactured largely by machine, the concrete pipe and the stoneware pipe are positioned and aligned on a base sleeve (9) as shown in Fig. 3. This base sleeve (9), which is mainly made of steel, is manufactured in such a way that a constant flow channel height is maintained for all tolerances of the two pipe systems that are possible in the standard. This is ensured by two guide rings (10) attached to the base sleeve. In order to be able to create this distance at the pipe spigot end (2), a positioned circumferential spacer (11), e.g. made of plastic, is attached to the stoneware pipe liner (3). The cavity (8) can now be filled using an automatic filling device. The so-called BK seal is then attached, as described in utility model G 8900345.4. Fig. 2 shows the pipe spigot end (2) and the pipe bell (1) of the composite pipe system in detail. The so-called BK seal (7) on the pipe spigot end (2) is attached up to the stoneware liner (3), so that the joint gap (12) between the pipe bell (1) and spigot end (2) is closed.

The composite pipe system created by this procedure, which can also be manufactured as a pipe with a base (shape: KFW-M), is very easy to install and simple and robust to handle on the construction site.

With this system, environmental hazards caused by exfiltrating wastewater are largely avoided. The high level of static safety and resistance to almost all wastewater means that a system has been created that fully meets the requirements of environmental legislation in line with the state of the art in accordance with the requirements of Section 7a of the WHG (Water Resources Act).

Claims (1)

Protection claims 1. Composite pipe system consisting of a pipe liner and a concrete pipe, characterized in that the cavity (8) between the pipe liner (3) and the concrete pipe (6) is joined together with a suitable casting compound to form a new multi-layer composite pipe. 2. Composite pipe system according to protection claim 1, characterized in that the material (5) filling the cavity (8) is a cement-bound, shrink-free, 1-component anti-corrosion mortar modified by organic and inorganic additives. 3. Composite pipe system according to claims 1 and 2, characterized in that the casting compound (5) is a swellable, cement-bound material. 4. Composite pipe system according to claims 1-3, characterized in that the ceramic stoneware pipe liner (3) has a chamfered, glaze-free edge at the pipe start (4) and pipe end (4). 5. Composite pipe system according to claims 1 - 4, characterized in that a factory-fitted seal (7) made of polyurethane is fitted to the pipe spigot end (2), which seals the entire joint gap (12) of the socket connection. 6. Composite pipe system according to claims 1-5, characterized in that a compression and lip seal according to DIN 4060 integrated in the pipe bell (1) and/or attached to the spigot end (2) is installed as a socket connection, the adjacent wall surfaces being provided with an epoxy resin coating. 7. Composite pipe system according to claims 1-6, characterized in that the pipe liner is a prefabricated ceramic element (e.g. Keraline system). 8. Composite pipe system according to claims 1-7, characterized in that the pipe liner consists of PVC or PE-HD. 9. Composite pipe system according to claims 1-8, characterized in that the pipe liner is a cast iron pipe. 10. Composite pipe system according to claims 1-9, characterized in that the pipe liner consists of a ceramic partial lining, whereby only the cavity between the partial lining and the concrete pipe is cast. 11. Composite pipe system according to claims 1-10, characterized in that the Inliner, the casting compound and the concrete pipe form a rigid bond that enables the absorption of thrust forces. Yl. Composite pipe system according to claims 1-11, characterized in that the ceramic inliner (3) and the concrete pipe (6) are placed on a base (9),
is adjusted and aligned so that a flat flow base and a circumferential annular gap are created in which the casting compound is distributed all around. 13. Composite pipe system according to claims 1 - 12, characterized in that a circumferential spacer (11) for adjusting the inliner is arranged around the ceramic inliner (3) at the opposite end of the base sleeve.