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DE4219434A1 - Detecting and interpreting leaks in non-metallic pipes with electrically conductive liquids, e.g. waste water, - evaluating variations in potential field in liquid as movable electrode approaches leakage point. - Google Patents

Detecting and interpreting leaks in non-metallic pipes with electrically conductive liquids, e.g. waste water, - evaluating variations in potential field in liquid as movable electrode approaches leakage point.

Info

Publication number
DE4219434A1
DE4219434A1 DE19924219434 DE4219434A DE4219434A1 DE 4219434 A1 DE4219434 A1 DE 4219434A1 DE 19924219434 DE19924219434 DE 19924219434 DE 4219434 A DE4219434 A DE 4219434A DE 4219434 A1 DE4219434 A1 DE 4219434A1
Authority
DE
Germany
Prior art keywords
potential
leaks
waste water
current
leakage point
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.)
Withdrawn
Application number
DE19924219434
Other languages
German (de)
Inventor
Bernhard Rammner
Burkhard Rammner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rammner Bernhard 54292 Trier De Rammner Burkha
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE19924219434 priority Critical patent/DE4219434A1/en
Publication of DE4219434A1 publication Critical patent/DE4219434A1/en
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/40—Investigating fluid-tightness of structures by using electric means, e.g. by observing electric discharges
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
    • G01M3/18—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/60—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrostatic variables, e.g. electrographic flaw testing

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

The method involves detecting the influence on the potential field of an electric current, emitted into the waste water in the vicinity of the leakage point, of the passage of parts of the total flow through the leakage aperture. The liquid flow passing the leakage point is simulated using the electric current between a movable electrode and a stationary earth electrode. A voltage generator is applied and measurement probes used to sense potential changes as the movable electrode approaches the leakage point. USE/ADVANTAGE - For safe detection and quantitative evaluation of leaks in waste water channels and similar systems using electrical measurements.

Description

Die Gedanken beziehen sich auf die Ortung (Detektierung) von Undichtigkeiten in Abwasserkanälen und ähnlichen Systemen vermöge von elektrischen Messungen.The thoughts relate to the location (detection) of Leaks in sewers and similar systems by electrical measurements.

Die Leckagen bedeuten für Abwasser-Rohrleitungen oberhalb des Grundwasserspiegels ein Absickern (Exfiltration) von Teilen des Abwassers und damit eine Kontaminationsgefahr für das Grundwasser, für Rohrleitungen innerhalb des Grundwassers einen Einbruch von Grundwasser in die Rohre (Infiltration) und damit eine unverträgliche Überlagerung des Systems und eine Überlastung der Kläranlagen.The leaks mean for waste water pipelines above the Groundwater level a seepage (exfiltration) of parts of the Waste water and thus a risk of contamination for the groundwater, a slump for pipelines within the groundwater of groundwater into the pipes (infiltration) and thus one incompatible overlay of the system and an overload of the Sewage treatment plants.

Der Stand der Technik zur Detektierung und Interpretation von Schadstellen ist - soweit bekannt - nur außerhalb des hier vorgeschlagenen Teilbereiches der Physik definiert. Detektierungen mit rein elektrischen Methoden sind nicht bekannt geworden mit Ausnahme der Anmeldung Deutsches Patentamt, Anmelder Rudolf Rammner, Offenlegungsschrift DE 40 10 622 A1 vom 10. 10. 1991 (Klasse G 01 M 3/40).The state of the art for the detection and interpretation of Damaged areas are - as far as known - only outside of here proposed sub-area of physics. Detections with purely electrical methods are not known with Exception of the application German Patent Office, applicant Rudolf Rammner, Publication DE 40 10 622 A1 dated 10.10.1991 (class G 01 M 3/40).

Detektierungen werden derzeitig vorgeschlagen und teilweise ausgeführt mit Hilfe von Überdruck und Unterdruck von Luft und Wasser in abgeschotteten Rohrabschnitten, mit Hilfe von Schalluntersuchungen von durch Leckstellen mit Geräusch ausströmender Luft, durch chemische Messungen mit Gassensoren über den Rohren an der Oberfläche, nachdem in die Rohre Leit-Gase eingeführt wurden oder ohnehin detektierbare vorhanden sind, die durch die Leckstellen austreten und an der Erdoberfläche zur Lokalisierung der Schäden dienen. Sodann werden Detektierungen großmaßstäblich mit fernsteuerbaren Fernseh-Kameras vorgenommen, jedoch nur oberhalb des Abwasser-Spiegels oder nach Außerbetriebsetzung einer Kanal-Haltung.Detections are currently proposed and partially carried out with the help of overpressure and underpressure of air and water in sealed pipe sections, with the help of sound tests of air escaping through leaks with noise, through chemical measurements with gas sensors above the tubes on the Surface after leading gases have been introduced into the pipes or anyway detectable are present due to the leaks emerge and on the surface of the earth to localize the damage serve. Detections are then included on a large scale remote-controlled television cameras, but only above the Sewage level or after decommissioning a sewer system.

Alle diese Verfahren haben Grenzen und oft beträchtliche Schwierigkeiten bei der Anwendung, so daß weitere Verfahren, die ebenso in gewissen speziellen Bedingungen Schwierigkeiten der Anwendung aufweisen können, zur Ergänzung zweckdienlich sind. All of these methods have limits, and often considerable ones Difficulty in application, so further procedures that difficulties in certain special conditions as well Application can be useful to supplement.  

Darüberhinaus sind mit den bekannten konventionellen Verfahren Aussagen über die Quantitäten der Leckmengen nur sehr bedingt prognostizierbar oder meßbar.In addition, with the known conventional methods Statements about the quantities of the leakage quantities are only very limited predictable or measurable.

Das hier genannte Verfahren hat gelegentlich auch Grenzen der Anwendbarkeit, teilweise auch in Abhängigkeit der Bedingungen vor Ort. Es kann jedoch ohne die Notwendigkeit einer dichten Abschottung und damit ohne eine Gefahr für das Personal wie bei einer Verwendung hoher Drucke in Einsatz genommen werden. Sowohl Exfiltrationen als auch Infiltrationen lassen sich untersuchen, und gelegentlich notwendige Flutungen zur Benetzung der Schadstellen sind nicht Verfahrens- hinderlich.The procedure mentioned here also occasionally has limits Applicability, partly depending on the conditions Place. However, it can be done without the need for tight foreclosure and thus without any danger to the personnel as if it were used high pressures can be used. Both exfiltrations and infiltrations can also be examined, and occasionally necessary flooding for wetting the damaged areas is not Process hindrance.

Der unten gegebene Literaturhinweis bezieht sich nicht direkt auf Detektierungen von Leckagen. Das genannte Werk enthält jedoch Hinweise auf die Approbiertheit der Vierpunkt-Widerstandsmethode mit der Anordnung A-M-N-B (A und B StromZuführungs-Elektroden, M und N Potentialmeß-Sonden).The bibliography given below does not refer directly to Leakage detection. However, the work mentioned contains Notes on the approval of the four-point resistance method the arrangement A-M-N-B (A and B current supply electrodes, M and N potential measuring probes).

Der Nutzen der genannten Möglichkeiten ergibt sich aus der meßtechnischen Lokalisierung der Leckstellen und ihres Ausmaßes zum Zwecke der Sanierung nach abgestuften Prioritäten des Handlungsbedarfes.The benefits of the above options result from the metrological localization of the leaks and their extent to Purpose of the renovation according to graded priorities of the Need for action.

Lit.:Lit .:

KUNETZ, G. Principles of Direct Current Resistivity Prospecting, Gebr. Borntraeger, Berlin, 1966.KUNETZ, G. Principles of Direct Current Resistivity Prospecting, Borntraeger brothers, Berlin, 1966.

Claims (5)

1. Verfahren zur qualitativen oder quantitativen Erfassung von Leckstellen in nichtmetallischen Rohrleitungen mit elektrisch leitenden Flüssigkeiten wie etwa Abwasser, dadurch gekennzeichnet, daß das Potentialfeld eines im Abwasser in der Nähe von Leckstellen emittierten elektrischen Stromes wegen des Austretens von Anteilen des Gesamtstromes durch die Leckagelöcher beeinflußt wird.1. A method for the qualitative or quantitative detection of leaks in non-metallic pipelines with electrically conductive liquids such as waste water, characterized in that the potential field of an electric current emitted in the sewage in the vicinity of leaks is influenced by the leakage of parts of the total current through the leakage holes . 2. Vorrichtung nach 1, dadurch gekennzeich­ net, daß zur Simulierung des die Leckstellen passierenden Flüssigkeitsstromes vertretungsweise ein elektrischer Stromfluß benutzt wird von einer längs der im Rohr befindlichen Flüssigkeit zu verschiebenden Stromemittierenden Elektrode zu einer an der Erdoberfläche oder irgend sonst weitab befindlichen stationären Fernerdungs-Elektrode, daß dieses bei Anwesenheit von Leckstellen im Rohr zusätzlich ermöglicht wird vermöge der Zwischenschaltung eines zweckdienlich verwendeten Spannungsgenerators, daß mittels einer oder mehrerer Meßsonden mit der Aufgabe einer Potentialabtastung der Umgebung der Stromelektrode (mit Hilfe weiterer Kabeladern) deren Potentialänderungen bei Annäherung der verschiebbaren Stromelektrode an eine Leckstelle in Abhängigkeit der geometrischen Lage zur Leckstelle registriert wird.2. Device according to 1, characterized net that to simulate the leakage passing Liquid flow represents an electrical current flow is used by a along the liquid in the pipe shifting current-emitting electrode to one at the Earth surface or any other stationary stationary Further earth electrode that this in the presence of leaks in the Pipe is additionally made possible by the interposition of a expediently used voltage generator that by means of or several measuring probes with the task of a potential sensing of the Environment of the current electrode (with the help of additional cable wires) Potential changes when the movable current electrode approaches to a leak depending on the geometric position Leak is registered. 3. Vorrichtung nach 2, dadurch gekennzeichnet, daß an zwei Potentialmeßsonden, in definiertem Abstand von der Stromelektrode befindlich, die Potentialdifferenz gemessen wird.3. Device according to 2, characterized in that on two potential measuring probes, at a defined distance from the Current electrode located, the potential difference measured becomes. 4. Vorrichtung nach 3, dadurch gekennzeichnet, daß die beiden Potentialmeßsonden symmetrisch zur Stromelektrode liegen sind und mit dieser auf einer zum Kanalrohr parallelen oder genähert parallelen Geraden liegen und darüberhinaus wahlweise entweder den Betrag der Potentialdifferenz oder die Potential­ differenz unter Vorzeichenbeachtung zu messen gestatten.4. Device according to 3, characterized in that the two potential measuring probes are symmetrical to the current electrode are lying and with this on a parallel to the sewer pipe or approximate parallel straight lines and also optional either the amount of the potential difference or the potential allow the difference to be measured taking the sign into account. 5. Vorrichtung nach 2 oder 3, dadurch gekennzeich­ net, daß die Verbindungslinien von der Stromelektrode zu Potentialmeßsonden senkrecht zur Kanalrohr-Richtung sind oder eine senkrechte Komponente haben und darüberhinaus beliebige Winkel gegenüber der Vertikalen aufweisen können.5. Device according to 2 or 3, characterized net that the connecting lines from the current electrode to Potential measuring probes are perpendicular to the direction of the sewer pipe or one have a vertical component and any angle can have against the vertical.
DE19924219434 1992-06-13 1992-06-13 Detecting and interpreting leaks in non-metallic pipes with electrically conductive liquids, e.g. waste water, - evaluating variations in potential field in liquid as movable electrode approaches leakage point. Withdrawn DE4219434A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19924219434 DE4219434A1 (en) 1992-06-13 1992-06-13 Detecting and interpreting leaks in non-metallic pipes with electrically conductive liquids, e.g. waste water, - evaluating variations in potential field in liquid as movable electrode approaches leakage point.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19924219434 DE4219434A1 (en) 1992-06-13 1992-06-13 Detecting and interpreting leaks in non-metallic pipes with electrically conductive liquids, e.g. waste water, - evaluating variations in potential field in liquid as movable electrode approaches leakage point.

Publications (1)

Publication Number Publication Date
DE4219434A1 true DE4219434A1 (en) 1993-12-16

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4412147A1 (en) * 1994-04-08 1995-10-12 Geocom Gmbh Determining sealing deficiencies or damages in drainage duct or sewer
DE4426872A1 (en) * 1994-07-29 1996-02-08 Seba Mess Ortungstech Determining place and size of leakages in sewage and drainage lines and similar systems
DE19955672A1 (en) * 1999-08-31 2001-03-08 Reinhard Steier Locating leakages involves sensing pulses from measurement device to pipeline via electric cable, measurement head contact via leakage to earth connection to produce measurement potential
EP1387156A1 (en) * 2002-07-29 2004-02-04 Texplor GmbH Method and device for determining the existences of leaks in blocking walls
WO2004051210A1 (en) * 2002-11-27 2004-06-17 Metrotech Corporation Sliding pipe plug
US7137308B2 (en) 2003-07-09 2006-11-21 Metrotech Corporation Sliding pipe plug
US20120139542A1 (en) * 2010-12-02 2012-06-07 Willowstick Technologies, Llc Subsurface water channel detection
US20170045416A1 (en) * 2015-08-11 2017-02-16 Electro Scan, Inc. Multi-sensor inspection for identification of pressurized pipe defects that leak
CN108692891A (en) * 2018-05-10 2018-10-23 重庆大学 A kind of pipe leakage simulation test device and test method

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4412147A1 (en) * 1994-04-08 1995-10-12 Geocom Gmbh Determining sealing deficiencies or damages in drainage duct or sewer
DE4426872A1 (en) * 1994-07-29 1996-02-08 Seba Mess Ortungstech Determining place and size of leakages in sewage and drainage lines and similar systems
EP0786653A1 (en) * 1994-07-29 1997-07-30 Seba-Dynatronic Mess- und Ortungstechnik GmbH Method and device for determining the location and dimension of leakage in sewers and the like
DE4426872C2 (en) * 1994-07-29 1998-04-30 Seba Mess Ortungstech Method and device for determining the location and extent of leaks in sewers and the like
DE19955672A1 (en) * 1999-08-31 2001-03-08 Reinhard Steier Locating leakages involves sensing pulses from measurement device to pipeline via electric cable, measurement head contact via leakage to earth connection to produce measurement potential
EP1387156A1 (en) * 2002-07-29 2004-02-04 Texplor GmbH Method and device for determining the existences of leaks in blocking walls
WO2004051210A1 (en) * 2002-11-27 2004-06-17 Metrotech Corporation Sliding pipe plug
US7137308B2 (en) 2003-07-09 2006-11-21 Metrotech Corporation Sliding pipe plug
US20120139542A1 (en) * 2010-12-02 2012-06-07 Willowstick Technologies, Llc Subsurface water channel detection
US20170045416A1 (en) * 2015-08-11 2017-02-16 Electro Scan, Inc. Multi-sensor inspection for identification of pressurized pipe defects that leak
US9933329B2 (en) * 2015-08-11 2018-04-03 Electro Scan, Inc. Multi-sensor inspection for identification of pressurized pipe defects that leak
US10557772B2 (en) * 2015-08-11 2020-02-11 Electro Scan, Inc. Multi-sensor inspection for identification of pressurized pipe defects that leak
CN108692891A (en) * 2018-05-10 2018-10-23 重庆大学 A kind of pipe leakage simulation test device and test method

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Legal Events

Date Code Title Description
8127 New person/name/address of the applicant

Owner name: RAMMNER, BERNHARD, 54292 TRIER, DE RAMMNER, BURKHA

8139 Disposal/non-payment of the annual fee