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WO2006007806A1 - Procede de localisation de fuites - Google Patents

Procede de localisation de fuites Download PDF

Info

Publication number
WO2006007806A1
WO2006007806A1 PCT/DE2005/001047 DE2005001047W WO2006007806A1 WO 2006007806 A1 WO2006007806 A1 WO 2006007806A1 DE 2005001047 W DE2005001047 W DE 2005001047W WO 2006007806 A1 WO2006007806 A1 WO 2006007806A1
Authority
WO
WIPO (PCT)
Prior art keywords
hydraulic
displacement body
section
piping system
hydraulic system
Prior art date
Application number
PCT/DE2005/001047
Other languages
German (de)
English (en)
Inventor
Gerd Scholz
Original Assignee
Gerd Scholz
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 Gerd Scholz filed Critical Gerd Scholz
Publication of WO2006007806A1 publication Critical patent/WO2006007806A1/fr

Links

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
    • G01M3/005—Investigating fluid-tightness of structures using pigs or moles

Definitions

  • the invention relates to a method for locating leaks in a liquid or gas filled hydraulic system or piping system.
  • Such a method is e.g. known from DE 41 28 750 Al or DE 40 17 238 Al.
  • the method known from DE 41 28 750 A1 describes the location of a leak that has been detected in a fluid pipeline network at an estimated leak creation time.
  • a pressure profile of the pipeline network is created by performing a pressure measurement as well as a flow measurement at measuring points.
  • a disadvantage of the above-mentioned method is the high technical complexity that is necessary for locating the leak.
  • the invention has for its object to provide a cost-effective method for locating leaks in liquid or gas-filled hydraulic systems or piping systems.
  • the method of locating leaks in a liquid or gas filled hydraulic system or piping system includes the steps of placing a displacer in the filled hydraulic system or piping system at an input location, tracking the path of the displacer in the hydraulic system or piping system until the displacer position in the hydraulic system or piping system only slightly or not at all changed.
  • the position of the displacement body is also the position of the leak at the same time.
  • the method takes advantage of the fact that in a hydraulic system or piping system which is filled with a liquid or a gas, an introduced displacement body moves toward the leak without its own drive, since the leak is a flow in the liquid or the gas in Direction to the position of the leakage generated.
  • An ideal prerequisite for carrying out the method is the presence of a substantially static liquid or a gas in the hydraulic system or piping system, the movement of which essentially results from the leak.
  • the displacement body If the displacement body has reached the position of the leak, it holds this position and leaves it only slightly or not at all due to the flow change, reduction or interruption, so that the position of the leakage is determined by the position of the displacement body in the hydraulic system or piping system can be.
  • the hydraulic system or pipeline system has a plurality of hydraulic sections or pipeline sections, which are meshed with one another at junctions. The method can also be used in such, meshed hydraulic systems or piping systems, since the displacement body travels independently in this case the way through the hydraulic system or piping to the leak.
  • the displacement body optionally has the property of changing the hydraulic conditions in a hydraulic section or pipe section, it may happen that the displacement body does not reach the position of the leak, since the fluid hydraulically simplifies the route to the leak location as a result of the changed hydraulic conditions between two adjacent nodes a plurality of hydraulic sections or pipe sections are present and are flowed through.
  • shut-off devices When eliminating the meshing, make sure that the displacement body can continue to reach the entire hydraulic system or piping system. It may therefore by actuating the shut-off. no hydraulic dead spaces or separate pipe sections occur.
  • the shut-off devices need not completely prevent the flow of liquid or gas, but it is sufficient to increase so far by the shut-off valves the flow resistance of the hydraulic section or pipe section to be influenced hydraulically, that the displacer chooses a different path through the piping system.
  • a pipeline section is separated from the hydraulic system or pipeline system in a method step before step (a) and the input position of the displacement body is located in
  • Hydraulic section or pipe section In the presence of further inflows or outflows in the piping system or hydraulic system can by disconnecting the pipe section or the hydraulic section from the rest of the piping system or hydraulic system, a nearly static state of
  • Liquid or gas can be achieved.
  • the displacement body fills a hydraulic cross section or pipe cross section of the hydraulic system or piping system completely, the input point of the displacement body is an end of the hydraulic section or pipe section, in step (b) is introduced at the input location, a medium such as a liquid and Following the path of the displacement body, the volume of the introduced medium is measured.
  • a medium such as a liquid
  • the displacement body for tracking the position in step (b) is equipped with a signaling device and signals of the signaling device are received by a signal receiving device outside the hydraulic system or piping system.
  • the signaling device of the displacement body can actively send out signals (transmitter), but it can also be a passive signaling device, eg an iron core. In the latter case, a transmitting device outside the pipeline system actively sends signals that strike the iron core and are detected by the signal receiving device.
  • the displacement body has a cross section which is substantially smaller than the hydraulic cross section or pipe cross section of the hydraulic system or piping system. In this way it can be avoided that the displacement body gets stuck in places where deposits on the walls of the hydraulic system or piping system have formed.
  • the displacement body consists wholly or partly of adaptable to different hydraulic geometries or pipe geometries materials, in particular of plastic.
  • a displacement body made of this material has a low weight and is inexpensive to manufacture.
  • a displacement of the displacer body out of the hydraulic system or piping system takes place at an output point in a method step following step (c).
  • the displacement body can be brought out of the hydraulic system or piping system, for example, by the targeted opening of a suitable extraction point of the hydraulic system or piping system.
  • more than one displacement body is introduced into the hydraulic system or piping system. If there are multiple leaks in the hydraulic system or piping system under investigation, it is likely that the leakage that has the largest amount of leakage is likely to be determined first. By introducing additional displacement body further leaks can be determined.
  • Figure 1 is a highly schematic representation of a piping system with a leak and a displacement body.
  • Fig. 2 is a schematic side view of a pipe section with a leak and a displacement body.
  • a piping system 1 is shown with a leak 2.
  • the piping system 1 is a part of a water supply network which is filled with water.
  • the number of customers is low, so that no continuous outflow of water takes place in the usual extent from the piping system 1.
  • the conditions for carrying out the method are therefore favorable.
  • a displacement body 3 is introduced at an input point 4 into the pipeline system 1 via a feed line 5.
  • the displacement body 3 is made of plastic and has a signaling device 6, with the help of which its position in the piping system 1 can be tracked via a receiver, not shown.
  • the path 7 of the displacement body 3 in the pipeline system 1 is reproduced by the continuous position determination in a further method step.
  • the displacement body 3 After the displacement body 3 has reached the leak 2, it changes its position only slightly or not at all. From the fact that the displacement body 3 leaves its position only slightly or not at all, it is concluded in a further method step that it has reached the position of the leak 2.
  • the piping system 1 has a plurality of pipe sections, which are interconnected at nodes.
  • a first and a second pipe section 8a, 8b of the pipeline system 1 are shown, which connect a first and a second, adjacent node 9a, 9b.
  • the displacement body 3 can from the first node 9 a to second node 9b either pass over the first pipe section 8a or via the second pipe section 8b.
  • Pipe section 8b interrupts the leakage, the obturator 10 is in the
  • Pipe section 8a closed or changed the hydraulic conditions such that the displacement body 3 can take only the way through the pipe section 8b to the leakage 2.
  • Fig. 2 shows a schematic side view of a water-filled pipe section 11 with a leak 12.
  • the pipe section 11 is part of an underground pipe network, not shown, and has a length of about 1000 m.
  • An entry point 13 and an exit point 14 are formed by the two ends of the pipe section 11. These are connected via a first and a second access shaft 15, 16 with the surface 17 in connection.
  • a first and a second access shaft 15, 16 are connected via a first and a second access shaft 15, 16 with the surface 17 in connection.
  • Entry point 13 introduced displacement body 18 made of plastic is located in the pipe section 11 via a water inlet 19 13 water is introduced into the pipe section at the input point. Due to the fact that the displacement body 18 has a cross section which is flush with the cross section of the pipe section 11, the position of the displacement body 18 can be determined from the introduced amount of water with a known pipe cross section. Alternatively, the position of the displacement body can be determined, for example, by a cord connected to it, the length of which is measured.
  • the displacement body 18 moves due to the resulting flow in the pipe section 11 to the leak 12 to. Once he has achieved this, he does not change his position because he closes the leak 12, and significantly changes the amount of leakage.
  • the leak 12 is detected due to the fact that no more or only considerably smaller amounts of water flow than before the position is reached via the water inlet 19 into the pipe section 11.
  • the leak 12 can be determined by the amount of water added and the known dimension of the pipeline. In carrying out the required repair work, the displacer 18 can be deployed. Alternatively, after the determination of the leakage 12 via the water inlet 19 by draining a water removal amount via the access shaft 15, which is larger than the leakage amount, the displacer can be removed from the pipe section 11. LIST OF REFERENCE NUMBERS

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

Procédé de localisation de fuites (2) dans un système (1) hydraulique ou de conduites rempli de liquide ou de gaz, qui consiste à introduire un déplaceur (3) dans le système (1) hydraulique ou de conduites rempli à un site d'entrée (4), à suivre un parcours (7) du déplaceur (3) dans le système (1) hydraulique ou de conduites jusqu'à ce que le déplaceur (3) ne change plus de position que de manière minime ou ne change plus de position du tout dans le système (1) hydraulique ou de conduites, et à identifier la position de la fuite (2) à l'aide de la position du déplaceur (3).
PCT/DE2005/001047 2004-07-21 2005-06-11 Procede de localisation de fuites WO2006007806A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410035333 DE102004035333B3 (de) 2004-07-21 2004-07-21 Verfahren zur Ortung von Leckagen
DE102004035333.6 2004-07-21

Publications (1)

Publication Number Publication Date
WO2006007806A1 true WO2006007806A1 (fr) 2006-01-26

Family

ID=35149062

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2005/001047 WO2006007806A1 (fr) 2004-07-21 2005-06-11 Procede de localisation de fuites

Country Status (2)

Country Link
DE (1) DE102004035333B3 (fr)
WO (1) WO2006007806A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2435329A (en) * 2006-02-16 2007-08-22 Keith Reed Fluid leak detection

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3696660A (en) * 1970-03-02 1972-10-10 Glenn O Hubbard Locating holes in tubing
WO2003002971A1 (fr) * 2001-06-29 2003-01-09 Societe Sicard Methode et un dispositif de detection de fuites sur reseaux etanches

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3298399A (en) * 1964-10-27 1967-01-17 Warren Petroleum Corp Apparatus to detect and temporarily seal a leak in a pipeline
DE4017238C2 (de) * 1990-05-29 1996-01-25 Ggu Ges Fuer Geophysikalische Verfahren und Vorrichtung zum Orten von Undichtigkeiten in nichtmetallischen unterirdischen Rohrleitungen
DE4128750C2 (de) * 1991-08-29 1995-03-16 Psi Ges Fuer Prozessteuerungs Verfahren zur Ortung eines Lecks in einem Fluid-Rohrleitungsnetz

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3696660A (en) * 1970-03-02 1972-10-10 Glenn O Hubbard Locating holes in tubing
WO2003002971A1 (fr) * 2001-06-29 2003-01-09 Societe Sicard Methode et un dispositif de detection de fuites sur reseaux etanches

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2435329A (en) * 2006-02-16 2007-08-22 Keith Reed Fluid leak detection
GB2435329B (en) * 2006-02-16 2010-10-27 Keith Reed Fluid leak detection

Also Published As

Publication number Publication date
DE102004035333B3 (de) 2006-04-13

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