WO2011083085A1 - Verfahren zum sanieren eines altrohrs sowie system zur durchführung eines solchen verfahrens - Google Patents
Verfahren zum sanieren eines altrohrs sowie system zur durchführung eines solchen verfahrens Download PDFInfo
- Publication number
- WO2011083085A1 WO2011083085A1 PCT/EP2011/000039 EP2011000039W WO2011083085A1 WO 2011083085 A1 WO2011083085 A1 WO 2011083085A1 EP 2011000039 W EP2011000039 W EP 2011000039W WO 2011083085 A1 WO2011083085 A1 WO 2011083085A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pipe
- old pipe
- outer diameter
- old
- new
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
- F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
- F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
- F16L55/1652—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section the flexible liner being pulled into the damaged section
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
- F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
- F16L55/1658—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section the old pipe being ruptured prior to insertion of a new pipe
Definitions
- the invention relates to a method for rehabilitating an old pipe, in which a new pipe, the outer diameter of which corresponds at least to the inner diameter of the old pipe, is first reduced in its outer diameter and then drawn into the old pipe.
- the invention further relates to a system for carrying out such a method.
- a generic method, also known as “swagelining”, is disclosed, for example, in GB 2 218 486 A.
- a liner tube (a so-called “liner") made of a plastic having a shape memory is disclosed , pulled by a reducing device having a conically tapered opening, whereby the tube is radially compressed.
- the diameter of the lining pipe is reduced by up to 15%, which makes it possible to pull the lining pipe with relatively little effort through the underground pipe to be lined with the lining pipe.
- the lining pipe After the lining pipe has been drawn into the old pipe, the lining pipe is relieved so that it expands again due to the shape memory of the plastic and-due to the outer diameter exceeding the inner diameter of the old pipe-presses against the inner wall of the old pipe. In this way, a gap between the old pipe and the lining pipe can be avoided, which could otherwise lead to
- CONFIRMATION COPY that the gap at high groundwater levels undesirably acts as a drainage between the old and the lining pipe or this is traversed by root system, which may impress the lining tube and thereby reduces the free flow.
- a problem with the method known from GB 2 218 486 A is that it can only be used for the refurbishment of old pipes whose inner surface area is intact and which, in particular, does not have any deformed or sunken portions or offsets, as for example in the area of pipe joints occur.
- the known from GB 2 218 486 A method for such old pipes regularly not usable.
- Old pipes which are to be rehabilitated by means of "swagelining" must also be sufficiently clean, which regularly requires a thorough cleaning, which removes the deposits formed over decades of use within the old pipe, which would otherwise hinder the collection
- process is associated with a high time and cost.
- the present invention seeks to provide an improved method for rehabilitating a waste pipe.
- a possibility should be given which makes it possible to use the process steps known from the "Swagelining" also in old pipes in which this was previously not possible.
- a suitable system for carrying out the method according to the invention is the subject of independent claim 7.
- Advantageous embodiments of the method and the system according to the invention are objects of the respective dependent claims and will become apparent from the following description of the invention.
- the essence of the invention is to use a method that corresponds to the described "Swagelining", in conjunction with a widening device, which is the neurohr - as directly as possible - leading the way through the old pipe.
- An “expansion device” is understood according to the invention to mean a device capable of transferring the old pipe to a state in which it is suitable for a Accordingly, a widening device according to the invention is designed such that these, for example, recessed or deformed sections of the old pipe are deformed back into the original cross section, optionally compensates for existing offsets in the old pipeline and / or removes deposits in the old pipeline.
- a new pipe In a method according to the invention for rehabilitating an old pipe, a new pipe, the outer diameter of which corresponds at least to the inner diameter of the old pipe, is first reduced in its outer diameter and then introduced into the old pipe, wherein the expansion pipe is advanced by the old pipe through the old pipe.
- a corresponding system according to the invention for carrying out such a method has at least one reducing device for reducing the outer diameter of a new pipe to an amount less than or equal to the inner diameter of an old pipe laid in the ground, and a widening device whose largest outer diameter essentially corresponds to the inner diameter of the old pipe.
- the inventive method does not relate exclusively to buried in the ground pipe, such as those of water supply and disposal and the gas supply, but can also be used in the rehabilitation of any other pipelines. From this, it is also intended to cover those pipelines which are exposed at the surface of the earth or in beds, e.g. Drainage pipes in landfills, are laid.
- the outer diameter of the (in cross-section, preferably circular), the new pipe is reduced in that this is compressed in the radial direction before entering the old pipe. This can preferably be done by means of a reducing device, through which the new-ear is pulled.
- Such a reduction device can preferably be designed such that it has a conically tapering opening in the longitudinal direction whose largest diameter is greater than or equal to the outer diameter of the new ear in its initial state and whose smallest diameter is less than or equal to the desired outer diameter of the new ear in its compressed state is.
- the neuro-ear is heated.
- the heating can thereby both before and during the reduction of the outer diameter of the neuro-ear; likewise, heating of the neuro-pipe may be provided during retraction into the old pipe.
- (Partial) maintenance of the reduction in the outer diameter of the new ear during retraction can be done in various ways.
- a material with a so-called shape memory can be used for the neuro ear, which deforms itself back to its original state after a certain relaxation time. Until this recovery is completed, the new pipe can then have been completely introduced into the old pipe.
- Another possibility may be to apply (external) forces in order to avoid excessive reformation of the new pipe during introduction into the old pipe. This can be done, for example, in that the neuro-ear is closed at the end and a negative pressure is generated in the neuro-ear, which counteracts the re-deformation of the neuro-ear.
- a reduction in the outer diameter may also be applied and maintained by creating tensile stresses in the neural tube through which the tube is stretched longitudinally, while at the same time reducing the cross-section of the neural tube due to the transverse contraction.
- the application of a defined tensile stress can be effected, for example, by pulling forces being introduced into the one end of the neuro-ear in order to draw it into the old pipe and attacking opposing forces at a section of the neuro-ear which is at a distance from this end.
- These counterforces can be generated, for example, by dragging the new ear under resistance through a reducing device.
- the re-deformation of the neuro-ear need not be based (exclusively) on a shape memory of the material used for the new-ear. It is also possible to actively effect reformation of the neural tube after insertion into the old pipe by applying external forces which cause or at least assist re-deformation. Such external forces can be applied, for example, by generating an overpressure in the closed end of the new pipe.
- the expansion device of the system according to the invention may preferably comprise a conical base body whose largest diameter preferably corresponds substantially to the inner diameter of the old pipe.
- a conical base body whose largest diameter preferably corresponds substantially to the inner diameter of the old pipe.
- the expander or its conical body for this purpose preferably has a cylindrical portion whose outer diameter corresponds substantially to the inner diameter of the old pipe. Due to the conical shape (a
- the expansion device further comprises an adapter element having on one side first attachment means for attachment to the new pipe and on another side second attachment means for attachment to a traction means.
- the traction means serve to pull the expander and the new pipe through the old pipe.
- the adapter element may be preferably further stored in a longitudinal axial opening of the conical body, thereby making it possible to first connect the adapter element with the new ear and then put this through the longitudinal axial opening of the body to then connect this with the traction means.
- Such a design allows a simple and uncomplicated connection of the neuro-ear and the expansion device with the Switzerlandmit- tel.
- the adapter element has at least one stop, on which this is supported on the conical body to the tensile forces, which are introduced into the traction means to the expansion device and the new pipe to pull through the old pipe, to support the adapter element. This can prevent that the possibly very high tensile forces, which may be required to deform the old pipe, are introduced into the new pipe, whereby this, in particular if it is made of plastic, could be damaged.
- FIG. 2 shows a cross section through an old pipe before the renovation.
- FIG. 3 shows the cross section of the old pipe shown in FIG. 2 with a retracted, reduced cross-section, new pipe;
- FIGS. 2 and 3 shows the cross section of the old pipe according to FIGS. 2 and 3 after a backward deformation of the new pipe.
- FIG. 1 shows a schematic representation of a system according to the invention.
- This comprises a reduction device 1, which comprises an annular frame 2, which forms a conical opening.
- the reducing device is positioned in an excavation, not shown in front of an opening into the pit, buried underground 3, wherein the arrangement of the reducing device 1 in the excavation is such that the conical opening on the side of the mouth of the old pipe 3 has a smaller diameter as on the opposite side.
- a front end of a new pipe 4 is pushed, whereby this is first compressed to a diameter corresponding to the smallest diameter of the conical opening of the reducing device 1.
- the emerging from the reducer 1 section of the new ear 4 then undergoes a certain radial reversion, but a reduction of the outer diameter of the new ear 4 is maintained in comparison to the initial state.
- the outer diameter of the new ear 4 in the original state at least equal to the inner diameter of the old pipe 3 and preferably even slightly larger.
- the neuro-ear 4 rests completely on the inner wall of the old pipe 3 after it has been pulled in and completely re-deformed without any gap formation.
- an adapter element 6 After the front end of the new pipe 4 has been pushed through the reducing device 1, it is connected to a rear end of an adapter element 6 by means of a conventional fastening element 5.
- This adapter element 6 is part of a widening device 7 of the system according to the invention.
- the adapter element 6 itself can be inserted into a central bore of a conical body 8 of the expansion device 7, wherein an annular shoulder 9 of the adapter element 6 engages in a corresponding enlarged recess of the central bore of the main body 8 and abuts there. A front end of the adapter element 6 then projects out of the main body 8 of the expansion device 7.
- a traction means such as a drawstring, a chain or a rope
- a conventional fastening element (not shown)
- a traction device (not shown) arranged there can continuously or stepwise apply tensile forces to the traction means in order to feed the expanding device 7 into the old pipe 3 with the new pipe 4 attached thereto. Because of the possibly very high forces that are required for the recovery of the old pipe by means of the expansion device 7, it is preferably a hydraulic Linearzug device, as is well known from the prior art.
- outside diameter is only slightly smaller than the inner diameter of the old pipe 3, at the points where this is collapsed or indented (see Fig. 2) again widened almost to the original cross section.
- offsets in the old pipe 3 which may have been caused by a complete breakage of the old pipe 3 or in the region of sleeves, can be compensated by the expansion device.
- the main body 8 in addition to the conical portion to an adjoining cylindrical portion, which ensures that the base body 8 when passing the offset, the two separated by the offset portions of the old pipe 3 are brought into a coaxial alignment.
- the expansion device 7 thus causes the old pipe 3 at those points where it was deformed, is widened again, whereby the expander following, radially compressed Neurohr 4 with a relatively small force and without the risk of damage by sharp, in the free cross-section protruding fragments can be drawn into the old pipe (see Fig. 3).
- the reduction in the outer diameter in the corresponding section of the new ear 4 is at least partially maintained during the entire retraction process, since in this section of the neural tube there is a continuous, partial reduction of the outer diameter of the new ear 4 4, ie the section between the reducing device 1 and the expander 7 considerable tensile stresses prevail, which lead to a longitudinal expansion and at the same time to a transverse contraction of the neuro pipe.
- These tensile stresses are generated by the tensile forces applied to the neuro-pipe via the traction means and by the corresponding counterforces which arise during the deformation of the neuro-ear in the reduction device.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/520,927 US8857475B2 (en) | 2010-01-07 | 2011-01-07 | Method and system for rehabilitating an old pipe |
GB1211738.8A GB2488952B (en) | 2010-01-07 | 2011-01-07 | Method for rehabilitating an old pipe, and system for carrying out such a method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010004097.5A DE102010004097B4 (de) | 2010-01-07 | 2010-01-07 | Verfahren zum Sanieren eines Altrohrs sowie System zur Durchführung eines solchen Verfahrens |
DE102010004097.5 | 2010-01-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011083085A1 true WO2011083085A1 (de) | 2011-07-14 |
Family
ID=43877052
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2011/000039 WO2011083085A1 (de) | 2010-01-07 | 2011-01-07 | Verfahren zum sanieren eines altrohrs sowie system zur durchführung eines solchen verfahrens |
Country Status (4)
Country | Link |
---|---|
US (1) | US8857475B2 (de) |
DE (1) | DE102010004097B4 (de) |
GB (1) | GB2488952B (de) |
WO (1) | WO2011083085A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11920721B2 (en) * | 2019-08-13 | 2024-03-05 | Andrew J. Mayer | Apparatus and method for in-situ fabrication of bi-layer composite pipe by deformation manufacture of compression-fit, shape memory polymer pipe (SMPP) mechanically united with host pipe |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8906997U1 (de) * | 1989-06-05 | 1989-07-20 | Berliner Wasser-Betriebe Eigenbetrieb Von Berlin, 1000 Berlin, De | |
GB2218486A (en) | 1988-05-09 | 1989-11-15 | British Gas Plc | Method and apparatus for the lining of existing pipes |
GB2397284A (en) * | 2003-01-20 | 2004-07-21 | Tracto Technik | Apparatus and method for pulling a line or a boring tool along a sewer hole |
DE102005045050A1 (de) * | 2005-09-21 | 2007-03-22 | Tracto-Technik Gmbh | Rohreinzugsadapter mit Dichtkissen |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
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DE3176344D1 (en) * | 1980-12-02 | 1987-09-10 | British Gas Corp | Improvements in the replacement of mains |
GB2186340B (en) * | 1986-02-10 | 1990-08-01 | British Gas Plc | Method for lining a pipe or main |
NZ228962A (en) * | 1988-05-09 | 1990-08-28 | British Gas Plc | Lining buried or installed pipe with a polymer liner |
AU4328589A (en) | 1988-09-13 | 1990-04-02 | North West Water Authority | Methods and apparatus for use in pipe lining |
EP0445326B1 (de) | 1990-03-07 | 1994-05-11 | Hermann Sewerin Gbr | Vorrichtung zum Einführen eines Kunststoffrohres in eine Rohrleitung |
US5256342A (en) * | 1991-03-21 | 1993-10-26 | Pipe Rehab International, Inc. | Method of lining a host pipe with a liner using cryogenic cooling |
GB2288216B (en) * | 1994-03-31 | 1997-11-12 | British Gas Plc | Method & apparatus for lining a pipe with a polymer liner |
US5584962A (en) * | 1994-05-20 | 1996-12-17 | Bradshaw; Franklin C. | Laminating and adhesive transfer apparatus |
DE19512602C1 (de) | 1995-03-31 | 1996-09-26 | Tracto Technik | Vorrichtung zum Rammen von Rohren oder zum Aufweiten von Pilotbohrungen oder Ersetzen erdverlegter Rohrleitungen |
JP2001508161A (ja) * | 1997-01-09 | 2001-06-19 | ワード カーター,ロバート | 地下パイプの非掘削取替のための装置 |
US6755593B2 (en) * | 2001-01-22 | 2004-06-29 | Earth Tool Company, L.L.C. | Pipe replacement method and rotary impact mechanism for pipe bursting |
DE102004036425C5 (de) | 2004-07-27 | 2009-07-02 | Tracto-Technik Gmbh | Vorrichtung und Verfahren zum Verbinden eines Rohrstrangs mit einem Bohr-, Aufweit- oder Einzugsgerät |
DE102005001222B4 (de) | 2005-01-10 | 2006-12-21 | Tracto-Technik Gmbh | Schneidvorrichtung und Schneidverfahren zum Zerschneiden oder Bersten einer Rohrleitung in Längsrichtung |
DE102005039790B3 (de) | 2005-08-22 | 2007-01-04 | Tracto-Technik Gmbh | Verfahren und Vorrichtung zum Sanieren erdverlegter Altrohrleitungen |
DE102006030802B4 (de) | 2006-06-30 | 2011-01-05 | Tracto-Technik Gmbh | Verfahren und Vorrichtung zum einfachen Einbringen eines langen Kunststoffrohres in einen Kanal über einen Schacht |
DE102008018150A1 (de) | 2008-04-10 | 2009-10-22 | Tracto-Technik Gmbh & Co. Kg | Werkzeug zum Längsunterteilen von Abwasserrohren |
-
2010
- 2010-01-07 DE DE102010004097.5A patent/DE102010004097B4/de active Active
-
2011
- 2011-01-07 GB GB1211738.8A patent/GB2488952B/en active Active
- 2011-01-07 WO PCT/EP2011/000039 patent/WO2011083085A1/de active Application Filing
- 2011-01-07 US US13/520,927 patent/US8857475B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2218486A (en) | 1988-05-09 | 1989-11-15 | British Gas Plc | Method and apparatus for the lining of existing pipes |
DE8906997U1 (de) * | 1989-06-05 | 1989-07-20 | Berliner Wasser-Betriebe Eigenbetrieb Von Berlin, 1000 Berlin, De | |
GB2397284A (en) * | 2003-01-20 | 2004-07-21 | Tracto Technik | Apparatus and method for pulling a line or a boring tool along a sewer hole |
DE102005045050A1 (de) * | 2005-09-21 | 2007-03-22 | Tracto-Technik Gmbh | Rohreinzugsadapter mit Dichtkissen |
Also Published As
Publication number | Publication date |
---|---|
GB2488952A (en) | 2012-09-12 |
GB201211738D0 (en) | 2012-08-15 |
DE102010004097B4 (de) | 2019-06-19 |
US20130087236A1 (en) | 2013-04-11 |
US8857475B2 (en) | 2014-10-14 |
GB2488952B (en) | 2015-08-05 |
DE102010004097A1 (de) | 2011-07-14 |
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