EP0987085A1 - Method of cleaning pipes - Google Patents
Method of cleaning pipes Download PDFInfo
- Publication number
- EP0987085A1 EP0987085A1 EP98115755A EP98115755A EP0987085A1 EP 0987085 A1 EP0987085 A1 EP 0987085A1 EP 98115755 A EP98115755 A EP 98115755A EP 98115755 A EP98115755 A EP 98115755A EP 0987085 A1 EP0987085 A1 EP 0987085A1
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- EP
- European Patent Office
- Prior art keywords
- liquid
- abrasive
- pressure
- mixture
- abrasive mixture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
- B24C3/32—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks
- B24C3/325—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks for internal surfaces, e.g. of tubes
- B24C3/327—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks for internal surfaces, e.g. of tubes by an axially-moving flow of abrasive particles without passing a blast gun, impeller or the like along the internal surface
Definitions
- the invention relates to a method for cleaning pipelines by means of them passed abrasive.
- incrustations In inlet and outlet lines for water, steam or gas in residential, industrial and Municipal facilities form incrustations after some operating time, i. H. Deposits before all made of lime and rust.
- the deposits can significantly reduce the pipe cross sections reduce and even completely prevent the flow of the flow medium.
- the incrustations are removed using the previously known methods using compressed air, a certain proportion of an abrasive, e.g. B quartz sand or corundum is added.
- the compressed air can be at a free end of the pipe system to be renovated depressed or sucked off at one of the two free ends of the piping system become.
- the latter has the advantage that the abrasive mixed with the coverings does not mix so quickly before kinking of the pipe system or at constrictions with a particularly thick one Incrustation can accumulate. Otherwise, constipation could occur which Cleaning process hindered or forced to stop.
- EP-B 0 299 134 The methods are known for example from EP-B 0 299 134 and EP-B 0 721 551.
- the compressed air / abrasive system also ensures that they are still intact Pipe walls loaded to a not inconsiderable degree. Because with a pressure of approx. 5 to 6 bar is worked and the removal of the incrustations does not take place evenly, since this on the individual pipe sections are very different in strength, the strong air-abrasive stream hits also bare pipe walls and thus also removes the wall material. A heavy load occurs especially at kinks in the pipe system, as the air jet meets the pipe wall here. It is therefore not uncommon for the tube and Pipe angles rubbed, which later form leaks.
- the invention has for its object a method for cleaning pipelines specify with which a far lower mechanical load on the pipes occurs and thus Leaks can be avoided.
- the object is achieved in that the abrasive by means of a Liquid flow is passed through the pipes.
- the process can preferably be carried out in such a way that the liquid-abrasive mixture is circulated through the pipes via a liquid pump.
- the use of water is a suitable liquid.
- the usual abrasives with grain sizes of approx. 0.25 to 2 mm and a density> 2.0 g / cm 3 are added.
- the connection from the free pipe ends to the pump is preferably via flexible pressure hoses.
- a conventional peristaltic pump can be used as a pump.
- the process has the advantage that the emery effect in the entire pipeline at the same time, the incrustations are removed much more gently is considered to be the use of compressed air with which sandblasting is practically carried out and with which the abrasive particles with high pressure on the incrustation, but also on the inner walls of the pipe to meet. Leakages can therefore be prevented with the method.
- drying with preheated air can follow the pipe cleaning take place at which the pipe system heats up to a desired temperature.
- the can Coating of the inner tube walls by means of a viscous, hardening synthetic resin Spraying can also be done with compressed air.
- the pressure of the liquid abrasive stream can be at the inlet side of the pipeline be kept constant.
- the method can also be carried out so that the pressure difference of flowing liquid abrasive mixture between the free pipe ends of the Pipeline is measured and the pressure at the beginning of the pipe is selected the higher the measured pressure difference is.
- Decreasing pressure difference means that the pipeline becomes increasingly permeable, so that the inlet pressure can be reduced. Does that Pressure difference to a final value, so it does not decrease within a period Significantly, this is a sign that the pipeline is largely encrusted is exempt and the cleaning process can be interrupted.
- the mixture of deposits, abrasive and liquid is then removed and the pipe is rinsed and, if necessary, endoscoped before the inner wall is coated, if necessary.
- Deposits and abrasives can be separated from each other, so that the Abrasive can be used several times. So is when using metal corundum as an abrasive e.g. B. a magnetic separation easily possible.
- the process can also be carried out so that the Liquid chemically active additives e.g. B. acids are added.
- the Liquid chemically active additives e.g. B. acids
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Reinigung von Rohrleitungen mittels eines durch sie hindurchgeführten Abrasivmittels.The invention relates to a method for cleaning pipelines by means of them passed abrasive.
In Zu- und Ablaufleitungen für Wasser, Dampf oder Gas in Wohn-, Industrie- und Kommunalanlagen bilden sich nach einiger Betriebszeit Inkrustierungen, d. h. Ablagerungen vor allem aus Kalk und Rost. Die Ablagerungen können die Rohrquerschnitte in erheblichem Maße verringern und sogar den Durchfluß des Strömungsmediums gänzlich verhindern.In inlet and outlet lines for water, steam or gas in residential, industrial and Municipal facilities form incrustations after some operating time, i. H. Deposits before all made of lime and rust. The deposits can significantly reduce the pipe cross sections reduce and even completely prevent the flow of the flow medium.
Um nicht das gesamte Rohrleitungssystem erneuern zu müssen, was mit einem hohen Kostenaufwand verbunden wäre, sind Verfahren entwickelt worden, mit denen die Rohrleitungen zunächst von den Inkrustierungen befreit werden, um anschließend innen getrocknet und mit einem Kunstharz beschichtet zu werden, was die Korrosion der Rohrleitung verhindern soll und die Neuablage von Verkrustungen zumindest erschwert. Auf diese Weise brauchen nur einzelne oder ggf. gar keine Rohrabschnitte erneuert zu werden.In order not to have to renew the entire piping system, which with a high Processes would be developed with which the Pipelines are first freed from the incrustations, then to the inside dried and coated with a synthetic resin, causing the corrosion of the pipeline should prevent and at least make it more difficult to re-deposit incrustations. In this way only individual or no pipe sections need to be replaced.
Das Entfernen der Verkrustungen erfolgt nach den bisher bekannten Verfahren mittels Druckluft, der ein bestimmter Anteil eines Abrasivmittels, z. B Quarzsand oder Korund, beigemischt wird. Die Druckluft kann dabei an einem freien Ende des zu sanierenden Rohrleitungssystems eingedrückt oder aber an einem der beiden freien Enden des Rohrleitungssystems abgesaugt werden. Letzteres hat den Vorteil, daß sich das mit den Belägen vermischte Abrasivmittel nicht so schnell vor Knickstellen des Rohrsystems oder an Engstellen mit besonders dicker Verkrustung ansammeln kann. Ansonsten könnte es zu einer Verstopfung kommen, die den Reinigungsvorgang behindert oder zu Unterbrechungen zwingt.The incrustations are removed using the previously known methods using compressed air, a certain proportion of an abrasive, e.g. B quartz sand or corundum is added. The compressed air can be at a free end of the pipe system to be renovated depressed or sucked off at one of the two free ends of the piping system become. The latter has the advantage that the abrasive mixed with the coverings does not mix so quickly before kinking of the pipe system or at constrictions with a particularly thick one Incrustation can accumulate. Otherwise, constipation could occur which Cleaning process hindered or forced to stop.
Die Verfahren sind beispielsweise aus dem EP-B 0 299 134 und dem EP-B 0 721 551 bekannt.The methods are known for example from EP-B 0 299 134 and EP-B 0 721 551.
Durch das System Druckluft/Abrasivmittel werden jedoch auch die noch intakten Rohrwandungen in nicht unerheblichem Maße belastet. Da mit einem Druck von ca. 5 bis 6 bar gearbeitet wird und die Entfernung der Verkrustungen nicht gleichmäßig erfolgt, da diese an den einzelnen Rohrabschnitten sehr verschieden stark sind, trifft der starke Luft-Abrasivmittel-Strom auch aufbereits blanke Rohrwandungen und trägt somit auch das Wandungsmaterial mit ab. Insbesondere an Knickstellen des Rohrsystems tritt eine starke Belastung auf, da der Luftstrahl hier frontal auf die Rohrwandung trifft. Nicht selten werden deshalb Dünnstellen des Rohres und Rohrwinkel aufgerieben, die dann später Leckagen bilden.However, the compressed air / abrasive system also ensures that they are still intact Pipe walls loaded to a not inconsiderable degree. Because with a pressure of approx. 5 to 6 bar is worked and the removal of the incrustations does not take place evenly, since this on the individual pipe sections are very different in strength, the strong air-abrasive stream hits also bare pipe walls and thus also removes the wall material. A heavy load occurs especially at kinks in the pipe system, as the air jet meets the pipe wall here. It is therefore not uncommon for the tube and Pipe angles rubbed, which later form leaks.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Reinigung von Rohrleitungen anzugeben, mit dem eine weit geringerer mechanische Belastung der Rohre auftritt und somit Leckagen vermieden werden.The invention has for its object a method for cleaning pipelines specify with which a far lower mechanical load on the pipes occurs and thus Leaks can be avoided.
Erfindungsgemäß wird die Aufgabe dadurch gelöst, daß das Abrasivmittel mittels eines Flüssigkeitsstromes durch die Rohrleitungen hindurchgeführt wird.According to the invention the object is achieved in that the abrasive by means of a Liquid flow is passed through the pipes.
Das Verfahren kann bevorzugt so durchgeführt werden, daß das Flüssigkeits-Abrasivmittel-Gemisch im Kreislauf über eine Flüssigkeitspumpe durch die Rohrleitungen gepumpt wird.The process can preferably be carried out in such a way that the liquid-abrasive mixture is circulated through the pipes via a liquid pump.
Als Flüssigkeit bietet sich natürlich die Verwendung von Wasser an. Dem werden übliche Abrasivmittel mit Korngrößen von ca. 0,25 bis 2 mm und einer Dichte > 2,0 g/cm3 zugesetzt. Die Verbindung von den freien Rohrenden zur Pumpe erfolgt bevorzugt über flexible Druckschläuche. Als Pumpe kann eine übliche Schlauchpumpe Verwendung finden.Of course, the use of water is a suitable liquid. The usual abrasives with grain sizes of approx. 0.25 to 2 mm and a density> 2.0 g / cm 3 are added. The connection from the free pipe ends to the pump is preferably via flexible pressure hoses. A conventional peristaltic pump can be used as a pump.
Das Verfahren hat den Vorteil, daß durch den Schmirgeleffekt, der in der gesamten Rohrleitung gleichzeitig erfolgt, eine wesentlich schonendere Entfernung der Verkrustungen vorgenommen wird als bei der Verwendung von Druckluft, mit der quasi ein Sandstrahlen erfolgt und mit der die Abrasivpartikel mit hohem Druck aufdie Verkrustung, aber auch auf die Rohrinnenwände treffen. Leckagen können mit dem Verfahren deshalb verhindert werden.The process has the advantage that the emery effect in the entire pipeline at the same time, the incrustations are removed much more gently is considered to be the use of compressed air with which sandblasting is practically carried out and with which the abrasive particles with high pressure on the incrustation, but also on the inner walls of the pipe to meet. Leakages can therefore be prevented with the method.
Im Anschluß an die Rohrreinigung kann wie bekannt die Trocknung mit vorgewärmter Luft erfolgen, bei der sich das Rohrsystem auf eine gewünschte Temperatur aufheizt. Darauf kann die Beschichtung der Rohrinnenwände mittels eines viskosen, aushärtenden Kunstharzes durch Versprühen unter Zuhilfenahme ebenfalls von Druckluft vorgenommen werden.As is known, drying with preheated air can follow the pipe cleaning take place at which the pipe system heats up to a desired temperature. The can Coating of the inner tube walls by means of a viscous, hardening synthetic resin Spraying can also be done with compressed air.
Bei starken Inkrustierungen kann es vorteilhaft sein, das Verfahren so durchzuführen, daß eine Richtungsumkehr des Flüssigkeits-Abrasivmittel-Stromes eingeleitet wird.In the case of strong incrustations, it can be advantageous to carry out the method in such a way that a Direction reversal of the liquid abrasive flow is initiated.
Aus dem gleichen Grunde kann es auch vorteilhaft sein, das Verfahren so durchzuführen, daß die Druckhöhe in der Rohrleitung pulsiert. For the same reason, it can also be advantageous to carry out the method so that the Pressure level in the pipeline pulsates.
Für einen Richtungswechsel bzw. eine Pulsation haben sich dabei Taktraten in der Größenordnung von 0,1 bis 1 Hz als zweckmäßig erwiesen.For a change of direction or a pulsation there have been clock rates in the Order of magnitude of 0.1 to 1 Hz has proven to be expedient.
Der Druck des Flüssigkeits-Abrasivmittel-Stromes kann an der Eingangsseite der Rohrleitung konstant gehalten werden.The pressure of the liquid abrasive stream can be at the inlet side of the pipeline be kept constant.
Vorteilhaft kann das Verfahren aber auch so durchgeführt werden, daß die Druckdifferenz des strömenden Flüssigkeits-Abrasivmittel-Gemisches zwischen den freien Rohrenden der Rohrleitung gemessen wird und der Druck am Rohranfang umso höher gewählt wird je höher die gemessene Druckdifferenz ist. Abnehmende Druckdifferenz bedeutet, daß die Rohrleitung zunehmend durchlässiger wird, so daß der Eingangsdruck erniedrigt werden kann. Geht die Druckdifferenz auf einen Endwert, sinkt sie also innerhalb eines Zeitraumes nicht mehr signifikant, ist das ein Zeichen dafür, daß die Rohrleitung von den Verkrustungen weitgehend befreit ist und der Reinigungsprozeß abgebrochen werden kann.Advantageously, the method can also be carried out so that the pressure difference of flowing liquid abrasive mixture between the free pipe ends of the Pipeline is measured and the pressure at the beginning of the pipe is selected the higher the measured pressure difference is. Decreasing pressure difference means that the pipeline becomes increasingly permeable, so that the inlet pressure can be reduced. Does that Pressure difference to a final value, so it does not decrease within a period Significantly, this is a sign that the pipeline is largely encrusted is exempt and the cleaning process can be interrupted.
Das Gemisch aus Ablagerungen, Abrasivmittel und Flüssigkeit wird anschließend entfernt und die Rohrleitung gespült sowie ggf. endoskopiert, bevor ggf. die Innenwandbeschichtung erfolgt.The mixture of deposits, abrasive and liquid is then removed and the pipe is rinsed and, if necessary, endoscoped before the inner wall is coated, if necessary.
Ablagerungen und Abrasivmittel lassen sich ggf. wieder voneinander trennen, so daß das Abrasivmittel mehrfach verwendet werden kann. So ist bei der Verwendung von Metallkorund als Abrasivmittel z. B. eine magnetische Trennung leicht möglich.Deposits and abrasives can be separated from each other, so that the Abrasive can be used several times. So is when using metal corundum as an abrasive e.g. B. a magnetic separation easily possible.
In Fällen starker Verkrustungen kann das Verfahren auch so durchgeführt werden, daß der Flüssigkeit chemisch aktive Zusätze z. B. Säuren, hinzugesetzt werden.In cases of severe incrustations, the process can also be carried out so that the Liquid chemically active additives e.g. B. acids are added.
Claims (12)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98115755A EP0987085A1 (en) | 1998-08-21 | 1998-08-21 | Method of cleaning pipes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98115755A EP0987085A1 (en) | 1998-08-21 | 1998-08-21 | Method of cleaning pipes |
Publications (1)
Publication Number | Publication Date |
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EP0987085A1 true EP0987085A1 (en) | 2000-03-22 |
Family
ID=8232493
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP98115755A Withdrawn EP0987085A1 (en) | 1998-08-21 | 1998-08-21 | Method of cleaning pipes |
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EP (1) | EP0987085A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10110621A1 (en) * | 2001-03-06 | 2002-09-19 | Rotecco Deutschland Gmbh | Internal cleaning and disinfecting process involves blasting with undried compressed air after emptying of residual fluid |
DE102015009153A1 (en) * | 2015-07-14 | 2017-01-19 | Liebherr-Aerospace Lindenberg Gmbh | Manufacturing method of a line component |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR780923A (en) * | 1933-11-09 | 1935-05-06 | Process for cleaning pipes | |
GB2140337A (en) * | 1983-05-25 | 1984-11-28 | Nihon Plant Service Centre Kab | Cleaning and lining a pipe |
EP0299134A1 (en) * | 1987-07-09 | 1989-01-18 | Werner Näf | Method for renovating the inner surfaces of installed conduits |
LU88032A1 (en) * | 1990-11-16 | 1993-05-17 | Pineur Entreprises S A | Method for cleaning elements of water distribution circuit, in particular of connections connected to main pipe of any diameter |
EP0634229A1 (en) * | 1993-07-12 | 1995-01-18 | Promotec AG | Method, assembly and apparatus for internal cleaning and coating of pipelines |
-
1998
- 1998-08-21 EP EP98115755A patent/EP0987085A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR780923A (en) * | 1933-11-09 | 1935-05-06 | Process for cleaning pipes | |
GB2140337A (en) * | 1983-05-25 | 1984-11-28 | Nihon Plant Service Centre Kab | Cleaning and lining a pipe |
EP0299134A1 (en) * | 1987-07-09 | 1989-01-18 | Werner Näf | Method for renovating the inner surfaces of installed conduits |
LU88032A1 (en) * | 1990-11-16 | 1993-05-17 | Pineur Entreprises S A | Method for cleaning elements of water distribution circuit, in particular of connections connected to main pipe of any diameter |
EP0634229A1 (en) * | 1993-07-12 | 1995-01-18 | Promotec AG | Method, assembly and apparatus for internal cleaning and coating of pipelines |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10110621A1 (en) * | 2001-03-06 | 2002-09-19 | Rotecco Deutschland Gmbh | Internal cleaning and disinfecting process involves blasting with undried compressed air after emptying of residual fluid |
DE102015009153A1 (en) * | 2015-07-14 | 2017-01-19 | Liebherr-Aerospace Lindenberg Gmbh | Manufacturing method of a line component |
US10441989B2 (en) | 2015-07-14 | 2019-10-15 | Liebherr-Aerospace Lindenberg Gmbh | Method for manufacturing a line component |
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