DE102009021878A1 - Flexible hose liner for reorganizing defective pipeline, has elastomeric sealable hose provided at wall structure and providing sealing function when liner is breakable or leakable during deformation of pipe of pipe system - Google Patents

Abstract

The liner has an elastomeric sealable hose at a wall structure and providing sealing function when the liner is breakable or leakable during deformation of a pipe of a pipe system. The elastomeric hose is laminated with glass and 100-150 mm shorter than the liner. The elastomeric hose is produced from styrene-Butadiene-Rubber, Acrylonitrile Butadiene Rubber, natural rubber or butadiene rubber. The elastomeric hose has thickness of 0.8-1.2 mm, and comprises an upper structure. An interface is made of corrosion-resistant material such as polyethylene or polyurethane.

Description

The Renovation concerns an inliner system for the renovation of defective, damaged ones or breakage-prone pipe systems. The use of the invention Refurbishment system is in all supply and disposal systems of Infrastructure (pipeline) can be used.

Of the current state of the art for installing a hose liner is shown below.

since For 30 years sewage plants in Europe have been using the pipe lining process rehabilitated. English engineers have in the 60s and 70s of the twentieth century considered, the structural To get substance from channels. The heavy traffic in the cities and the numerous foreign discharges in the road cross sections and the financial aspects required a construction process with as few excavations as possible. Another important factor in the development of a Rehabilitation process was the structural condition of the sewers.

At the The pipe lining process becomes a soaked with synthetic resin Hose fabric carrier positioned in the old pipe and on site hardened. The old pipe is used as formwork. The result is a sleeve-free plastic pipe, which in the existing channel positive fit.

The basic concept of all pipe lining processes is to feed or roll in a tube impregnated with reaction resin with the length and the inner diameter of the old pipe through the manholes into the channel. In the channel, the hose is pressed by air or water pressure to the pipe wall and cured depending on the process to a liner with defined static. After DIN EN 752-5 "Drainage systems outside buildings" The requirements for a rehabilitated canal correspond to a new system. The sewer must be tight against sewage, safe to operate, hydraulically sufficient, and resistant to downforce and high-pressure cleaning, and to the static loads.

The Differences in the tube liner process are essentially in the materials used, the installation (method the hose installation) and the system of curing the reaction resins.

The Hose installation procedures differ as follows:

inversion method

at the inversion process or Umstülpverfahren is the Hose start with a steel bow or collar in the shaft before positioned the pipe opening of the channel to be rehabilitated. With the help of an appropriate overpressure (due to the process between 0.5 and 2 bar), the resinated tubing becomes continuous circled by water pressure or pressure in the channel.

Pull-

At the The resinous tubing is pulled in using rope winches pulled from the shaft into the channel to be rehabilitated. To the hose be protected before the pulling z. B. sliding films built into the bottom of the canal. Subsequently, the Hose set up with water or compressed air and against the migration of the Old pipe pressed.

Retraction and inversion process

A Combination of the retraction and inversion technique becomes larger and thicker hose liners used. The actual wall thickness the hose is split and installed in two steps. The first hose is transferred from the manhole to the sewer to be rehabilitated moved in. The second hose is in the water pressure Channel inversed. As a result, both hoses are form-fitting pressed against the pipe wall.

Typical wall construction of the hose liners According to the state of the art:

The tube liners of the usual process on the market are made of different materials. Depending on the process, the individual components belong to the final product "Liner" or are only installation aids. The following short overview of the materials describes and explains the materials of a typical liner wall construction from "inside and outside": Inner film: Separating layer, which forms the new pipe inner wall after installation (usually made of corrosion-resistant materials such as PU, PE or PUR) Substrate / composite: porous component of the liner with or without reinforcement, which can absorb the liquid resin systems and cured into a composite (usually from corrosion-resistant materials such as synthetic fiber felt (felts, polyacrylic or polyester fiber-based webs) or E-CR textile glass (Aluminum-lime-silicate glass) with glass fibers as reinforcement) Resin: Waste water stocks (usually pH 1-pH 10) and moisture-resistant warm- or light-curing resins. Unsaturated polyester resins (UP), epoxy resins (EP) or vinyl ester resins (VE) Outer film: Separating layer, which rests on the old pipe after installation (usually made of corrosion-resistant materials, eg polyethylene (PE) or polyurethane (PUR) h

Hose rehabilitation systems of the prior art are also in DE 201 21 554 U1 described. Here a hose system is described, which serves for the renovation of pressure pipe performance. The method is characterized in that the system comprises an impregnated with 2-component epoxy resin fabric / Gewirkschlauch and acting as a support tube elastic sheath and expandable from its interior by the pressurized bare elastic sheath and to the inner wall of the to be rehabilitated Tube is pressable.

Curing process according to the state of the technique:

In general, curing processes of the resin systems (thermosetting resins) can be divided into three curing mechanisms: 1. Hot curing Hot Water: Expansion of the hose with water (or combination of compressed air and water), the curing process is initiated by electrical heating of the water steam curing: Expansion of the hose with compressed air, the hardening process takes place by means of superheated steam

2. Light Curing:

widening the hose by compressed air, the curing process takes place by irradiating the resin system with light of specific wavelengths. The resins are added special light initiators.

3. Cold hardening:

widening of the hose i. d. R. by compressed air, the curing of the resin is done using "hardeners and accelerators "taking advantage of the ambient temperature.

task The present invention is a system for the renovation of Pipelines, in particular a flexible hose liner, the solutions known from the prior art substantially improved. A significant according to the invention Improvement is achieved by the flexible hose liner even after its hardening can still absorb movements, without that the renovated pipe system is leaking. Another essential Advantage of this construction is to be seen in that the elastomeric (rubber-like) skin of the liner against all known wastewater is resistant and retains its sealing function.

A Another object of the invention flexible Hose liner is associated with the possibility of one to create a self-cleaning flow cross section in the pipe system. These Self-cleaning properties can be achieved by using the elastomeric hose applied nubs (after the lotus flower effect) achieved become. After laying and curing of the system in Channel cross-section form the nubs formed on the elastomer liner towards the pipe inner wall toward a structure. This structure is designed that the flowing media and the attachment after the lotus blossom effect be transported away.

The inventive object is achieved by that in the known tube liner systems according to the prior art an elastomeric (rubber-like) tube is adapted, the movements of z. As traffic loads, mitigation problems or other soil mechanical influences absorbs. hereby becomes the current tube liner system of the prior art against leaks by z. b. Material break protected. The elastomeric tube absorbs movements and ensures a dense system, which infiltrations as well as exfiltrations prevented from the pipe system. Another advantage of the invention flexible hose liner system is to be seen in that or in Adaptable to existing refurbishment systems.

But even a use without the existing refurbishment systems is conceivable since the elastomeric tube liner according to the invention one-sided and / or two-sided laminated with fleece. hereby may be the resins or other curing materials be applied directly on the laminated fleece.

Two Embodiments are described below.

A variant of the flexible hose liner with the typical wall structure consists z. B. from the following components: Inner film: Separating layer, which forms the new pipe inner wall after installation (usually made of corrosion-resistant materials such as PU, PE or PUR) Substrate / composite: porous component of the liner with or without reinforcement, which can absorb the liquid resin systems and cured into a composite (usually from corrosion-resistant materials such as synthetic fiber felt (felts, polyacrylic or polyester fiber-based webs) or E-CR textile glass (Aluminum-lime-silicate glass) with glass fibers as reinforcement) Resin: Waste water stocks (usually pH 1-pH 10) and moisture-resistant warm- or light-curing resins. Unsaturated polyester resins (UP), epoxy resins (EP) or vinyl ester resins (VE)

Flexible elastomeric hose liner:

Interface of elastomeric (rubber-like) laminated with fleece Material which is also provided with knobs if necessary and after the Installation rests on the old pipe.

When Another option is the flexible elastomer liner be mounted as an alternative to the inner film. The further wall construction is then through the carrier / composite material, the resin and an outer film formed.

Also Sandwich variants are possible depending on the application.

Another embodiment is described below:
The flexible elastomeric liner is installed as a so-called solo liner. In this case, the fleece laminated on the elastomeric hose (either one or both sides) is impregnated with suitable resins and placed in the old pipe. For better installation, an outer and / or inner film can be adapted.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 20121554 U1 [0012]

Cited non-patent literature

• - DIN EN 752-5 "Drainage systems outside buildings" [0005]

Claims (18)

Flexible pipe liner for rehabilitating defective pipe systems, characterized in that over the length of the pipe to be rehabilitated pipe liner constructed according to the prior art is installed, which has an elastomeric (rubber-like) tight hose on or in its wall construction, characterized in that the elastomeric Hose after installation Contact with the hose liner and subsequent deformation of the pipe may rupture / leak the hose liner, but the sealing function will continue to be taken over by the elastomeric hose. Flexible hose liner according to claim 1, characterized characterized in that the elastomeric tube is one-sided with a Fleece, preferably made of glass fibers, laminated, which is for a homogeneous connection to the pipe liner through the bond with the resin leads. Flexible hose liner according to claim 1 and 2, characterized characterized in that the surface of the non-woven Laminated side has a surface structure. Flexible hose liner according to claim 1, characterized characterized in that the hose liner on both sides with a fleece laminated, which is a connection between the to be rehabilitated Pipe and the pipe liner through the resin leads. Flexible hose liner according to claim 1, 2 and 4, characterized in that the nonwoven forces in one Can accommodate direction. Flexible hose liner according to claims 1, 2 and 4, characterized in that the nonwoven forces in two directions can record. Flexible tube liner according to claim 1 to 6, characterized characterized in that the elastomeric hose between the hose liner and the pipe to be rehabilitated. Flexible hose liner according to claim 1 to 7, characterized characterized in that the elastomeric tube as a sandwich in the Liner is involved. Flexible tube liner according to claim 1 to 8, characterized characterized in that the elastomeric tube is about 100-150 mm shorter than the hose liner. Flexible hose liner according to claim 1 to 9, characterized characterized in that the elastomeric hose is made of EPDM, SBR, NR, BR or NBR or blends thereof. Flexible tube liner according to claim 1 to 10, characterized in that the elastomeric tube has a hardness of preferably 50-70 degrees Shore A. Flexible tube liner according to claim 1 to 11, characterized in that the elastomeric tube has a thickness of preferably 0.8-1.2 mm. Flexible tube liner according to claim 1 to 12, characterized in that the elastomeric hose different Has colors to make a visual assignment to the possible Purpose of use (eg blue for drinking water; black for wastewater) Flexible tube liner according to claim 1 to 13, characterized in that the elastomeric tube circumferentially in certain distances with swellable materials equipped, which is the rear running of the hose liner between the liner and the pipe to be rehabilitated prevented. Flexible hose liner according to claim 1 to 14, characterized in that the liner and the elastomeric tube are firmly connected and form a unity. Flexible hose liner according to claim 1 to 15, characterized in that the elastomeric tube has a surface structure which, after installation in the pipe to be rehabilitated on the inner wall of the pipe and the flow conditions be improved in the pipe. Flexible hose liner according to claims 1 to 16, characterized in that the elastomeric tube has a smaller outer Diameter than the pipe inside diameter and during the installation of the hose liner stretches and wrinkle-free the tube inside rests. Flexible pipe liner for rehabilitation of defective pipe systems, characterized in that the liner structure can also be used as a solo liner with the following construction: Inner liner: release liner, which forms the new inner pipe wall after installation (usually made of corrosion-resistant materials such as PU, PE or PUR) carrier material / composite: elastomeric tube on one side and / or two sides with a non-woven, preferably made of glass fibers, laminated, which leads to a homogeneous connection to the pipe liner by bonding with the following resin components. Resin: Waste water stocks (usually pH 1-pH 10) and moisture-resistant warm- or light-curing resins. Unsaturated polyester resins (UP), epoxy resins (EP) or vinyl ester resins (VE) Outer film: Release layer that rests on the old pipe after installation (usually made of corrosion-resistant materials such as polyethylene (PE) or polyurethane (PUR).