WO2003002971A1 - Method and device for detection of leaks in a sealed network - Google Patents

Method and device for detection of leaks in a sealed network Download PDF

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Publication number
WO2003002971A1
WO2003002971A1 PCT/FR2001/002097 FR0102097W WO03002971A1 WO 2003002971 A1 WO2003002971 A1 WO 2003002971A1 FR 0102097 W FR0102097 W FR 0102097W WO 03002971 A1 WO03002971 A1 WO 03002971A1
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WO
WIPO (PCT)
Prior art keywords
pipe
leak
sealed
valve
shutter
Prior art date
Application number
PCT/FR2001/002097
Other languages
French (fr)
Inventor
Frédéric SONZA
Original Assignee
Societe Sicard
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 Societe Sicard filed Critical Societe Sicard
Priority to PCT/FR2001/002097 priority Critical patent/WO2003002971A1/en
Publication of WO2003002971A1 publication Critical patent/WO2003002971A1/en

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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
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
    • G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
    • G01M3/2823—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pigs or moles traveling in the pipe

Definitions

  • the subject of the present invention is a method and a device for detecting leaks in sealed networks.
  • watertight conduits of all kinds whether they are drinking water, waste water, gas or watertight pipes of all types and in particular those intended for optical fibers which are sheaths of small diameter and of great length.
  • Watertight multi-purpose networks and in particular underground networks, are more and more numerous, especially in urban areas.
  • the tightness of the conduits must imperatively be carefully checked before they are put into service.
  • several methods or methods are known for locating a leak in a sealed network, but these are empirical techniques requiring heavy and expensive means and which generally do not allow the location of leaks to be determined with precision.
  • the method and the device according to the present invention have the objective of remedying this state of affairs.
  • the system is indeed very simple to implement, it requires low means and ensures, in a very high percentage of cases, rapid detection. and efficient of the leak (s)
  • the process allows precise location of the location of the leak caused by a defect, a faulty installation or an incident
  • FIG. 1 represents the general diagram of the leak detection installation
  • FIG. 2 is a top view of a mobile box grouping together the system control means
  • FIGS. 3 and 4 are axial sections on a larger scale of two variants of mobile shutter.
  • the invention is based on a simple observation: a leaky pipe necessarily has a movement of its content, from the point of entry to the escape. By closing off its end, and by sending pressurized air into the pipe, we obtain an air cushion which acts as a stopper just after the leak and a flow from the source of compressed air towards the leak. If one succeeds in stabilizing a mobile element at the right of the escape, it only remains then to detect its position.
  • the device consists of a source of compressed air such as compressor 1 supplying, by means of a tube 2, a nozzle 3 mounted at the head of the pipe 4 to be tested whose opposite end is closed by a plug 5.
  • a source of compressed air such as compressor 1 supplying, by means of a tube 2, a nozzle 3 mounted at the head of the pipe 4 to be tested whose opposite end is closed by a plug 5.
  • the valve 8 is closed during the filling of the pipe 4 which therefore takes place by the bypass 9, then open to set the movable shutter in motion.
  • the shutter 11 must be waterproof, sliding and light in order to reduce the friction on the walls of the pipe 4.
  • it can advantageously be made modular thanks to interchangeable elastomeric sealing discs 12, in order to be able to adapt to pipes of different diameter.
  • the shutter can be more rudimentary and constituted, for example, of a simple extruded cylinder 13 of synthetic material such as polystyrene created with a punch and provided with a hooking system 14.
  • the bypass 9 is essential because the pipe 4 must be under pressure before sending the mobile shutter 11 which must be waiting in the internal zone 10, at the head of the pipe.
  • the distance between the shutter and the air inlet of the bypass 9 on the pipe must be sufficient to prevent the shutter from being driven by vacuum during filling.
  • a blocking valve 15 downstream of the internal zone 10 waiting for the latter it is possible to provide a blocking valve 15 downstream of the internal zone 10 waiting for the latter.
  • the connection of the bypass can be made by means of a collar 16 for taking over the pipe 4.
  • a computer 17 consisting of an electronic cell provided with a program integrating the existing data such as the diameter and the length, as well as the filling time thanks to the flow meter 7 coupled to the program, which allows the computer, after having analyzed the existing data of internal diameter and length of pipe 4, to establish a diagnosis on the leak.
  • the computer 17 also makes it possible to determine the optimal air flow.
  • a low flow leak requires the full flow of the compressor 1 to fill the pipe 4 in order to create a balance and then move the shutter 11, whereas for a high flow leak it is preferable to reduce the flow of the compressor in order to avoid wear of the shutter.
  • the computer will emit a signal indicating that it is necessary to open the valve 8, and possibly the blocking valve 15, or will directly control this or these valve (s) these are solenoid valve (s).
  • the electronic cell can also actuate the flow meter 7 to reduce the flow rate if the leak is too great in order to avoid too high a speed of the mobile shutter 11.
  • the computer 17 could advantageously be housed in a mobile box 18 grouping together the flow meter 7, the valve 8 and the pressure gauge 6 (FIG. 2).

Abstract

The invention relates to a method and a device for detection of leaks in a sealed network. The method comprises injecting air under pressure into the end of a pipe (4), the other end of which has been blocked, for a period of time which is sufficient to create a stable cushion of air just after the leak, then to use the residual air flow between the point of injection and the leak to move a mobile pig (11), which may be retrieved from outside the pipe, to the position of the leak, whereupon said pig stops on meeting the cushion of air. The position of the leak is determined by means of an emitting probe or a measuring line attached to the mobile pig. Said method is generally applicable to sealed lines of all types, such as drinking water, sewage, or gas lines or sealed ducts of all types, in particular those ducts for optical fibres which are small diameter ducts of great length.

Description

MÉTHODE ET UN DISPOSITIF DE DÉTECTION DE FUITES SUR RÉSEAUX ÉTANCHES METHOD AND DEVICE FOR DETECTING LEAKS ON WATERPROOF NETWORKS
La présente invention a pour objet une méthode et un dispositif de détection de fuites sur réseaux étanchesThe subject of the present invention is a method and a device for detecting leaks in sealed networks.
Elle s'applique d'une manière générale aux conduits étanches de toute nature, qu'il s'agisse de réseaux d'eau potable, d'eau usée, ou de gaz ou de fourreaux étanches de tous types et en particulier ceux destinés aux fibres optiques qui sont des fourreaux de petit diamètre et de grande longueur.It generally applies to watertight conduits of all kinds, whether they are drinking water, waste water, gas or watertight pipes of all types and in particular those intended for optical fibers which are sheaths of small diameter and of great length.
Les réseaux étanches à vocations multiples, et tout particulièrement les réseaux souterrains, sont de plus en plus nombreux, notamment en milieu urbain. L'étanchéité des conduits doit impérativement être soigneusement vérifiée avant leur mise en service. A ce jour on connaît plusieurs procédés ou méthodes permettant de localiser une fuite dans un réseau étanche, mais il s'agit de techniques empiriques demandant des moyens lourds et onéreux et qui ne permettent généralement pas de déterminer avec précision l'emplacement des fuites.Watertight multi-purpose networks, and in particular underground networks, are more and more numerous, especially in urban areas. The tightness of the conduits must imperatively be carefully checked before they are put into service. To date, several methods or methods are known for locating a leak in a sealed network, but these are empirical techniques requiring heavy and expensive means and which generally do not allow the location of leaks to be determined with precision.
La méthode et le dispositif selon la présente invention ont pour objectif de remédier à cet état de choses Le système est en effet très simple à mettre en oeuvre, il demande de faibles moyens et assure, dans un très fort pourcentage de cas, une détection rapide et efficace de la ou des fuites Le procédé permet une localisation précise de l'endroit où se trouve la fuite causée par un défaut, une malfaçon de pose ou un incidentThe method and the device according to the present invention have the objective of remedying this state of affairs. The system is indeed very simple to implement, it requires low means and ensures, in a very high percentage of cases, rapid detection. and efficient of the leak (s) The process allows precise location of the location of the leak caused by a defect, a faulty installation or an incident
Le procédé consiste à injecter, à l'extrémité d'une conduite dont on a bouché l'autre extrémité, de l'air sous pression durant un laps de temps suffisant pour créer un coussin d'air stable juste après la fuite, puis à utiliser le flux d'air persistant entre le point d'injection et la fuite pour entraîner un obturateur mobile repérable de l'extérieur de la conduite jusqu'à l'emplacement de la fuite où il s'immobilisera en butant sur le coussin d'air, la position de la fuite étant déterminée au moyen d'une sonde émettrice ou d'un fil métrique accroché à l'obturateur mobile Sur les dessins annexés, donnés à titre d'exemples non limitatifs de formes de réalisation de l'objet de l'invention : la figure 1 représente le schéma général de l'installation de détection de fuite, la figure 2 est une vue de dessus d'un coffret mobile regroupant les moyens de contrôle du système et les figures 3 et 4 sont des coupes axiales à plus grande échelle de deux variantes d'obturateur mobile.The process involves injecting pressurized air at the end of a pipe with the other end blocked for a period of time sufficient to create a stable cushion of air immediately after the leak, then use the persistent air flow between the injection point and the leak to drive a movable obturator located from the outside of the pipe to the location of the leak where it will stop by stopping on the cushion air, the position of the leak being determined by means of an emitting probe or a metric wire hooked to the mobile shutter In the accompanying drawings, given by way of nonlimiting examples of embodiments of the subject of the invention: FIG. 1 represents the general diagram of the leak detection installation, FIG. 2 is a top view of a mobile box grouping together the system control means and FIGS. 3 and 4 are axial sections on a larger scale of two variants of mobile shutter.
L'invention est basée sur une constatation simple : une conduite qui fuit a forcément un mouvement de son contenu, du point d'entrée vers la fuite. En obturant son extrémité, et en envoyant de l'air sous pression dans la conduite et on obtient un coussin d'air qui sert de buttoir juste après la fuite et un flux depuis la source d'air comprimé vers la fuite. Si l'on réussit à stabiliser un élément mobile au droit de la fuite, il ne reste plus alors qu'à détecter sa position.The invention is based on a simple observation: a leaky pipe necessarily has a movement of its content, from the point of entry to the escape. By closing off its end, and by sending pressurized air into the pipe, we obtain an air cushion which acts as a stopper just after the leak and a flow from the source of compressed air towards the leak. If one succeeds in stabilizing a mobile element at the right of the escape, it only remains then to detect its position.
Le dispositif, figures 1 à 5, est constitué d'une source d'air comprimé telle que compresseur 1 alimentant, au moyen d'un tube 2, un embout 3 monté à la tête de la conduite 4 à tester dont l'extrémité opposée est obturée par un bouchon 5.The device, Figures 1 to 5, consists of a source of compressed air such as compressor 1 supplying, by means of a tube 2, a nozzle 3 mounted at the head of the pipe 4 to be tested whose opposite end is closed by a plug 5.
Le long du tube 2 sont disposés un manomètre 6 de contrôle, un débitmètre 7 et une vanne 8 en amont de laquelle est branché une dérivation 9 raccordée à la conduite 4, à une certaine distance de l'embout 3 de façon à délimiter en tête de conduite une zone interne 10 de stockage d'un obturateur mobile 11 destiné à entraîner une sonde émettrice repérable de l'extérieur, ou un fil métrique (type "topo fil"), du point d'entrée jusqu'à la fuite. Il suffit de disposer d'un détecteur externe approprié ou de mesurer sur la tranchée la longueur indiquée par le fil métrique pour localiser l'endroit de la fuite. La vanne 8 est fermée durant le remplissage de la conduite 4 qui s'effectue donc par la dérivation 9, puis ouverte pour mettre l'obturateur mobile en mouvement.Along the tube 2 are arranged a pressure gauge 6, a flow meter 7 and a valve 8 upstream of which is connected a bypass 9 connected to the pipe 4, at a certain distance from the nozzle 3 so as to delimit at the head driving an internal area 10 for storing a movable shutter 11 intended to drive an emitting probe locatable from the outside, or a metric wire ("topo wire" type), from the entry point to the leak. It is enough to have an appropriate external detector or to measure on the trench the length indicated by the metric wire to locate the place of the leak. The valve 8 is closed during the filling of the pipe 4 which therefore takes place by the bypass 9, then open to set the movable shutter in motion.
L'obturateur 11 doit être étanche, coulissant et léger afin de réduire les frottements sur les parois de la conduite 4. Pour les petites fuites, il peut avantageusement être rendu modulable grâce à des disques élastomères 12 d'étanchéité interchangeables, afin de pouvoir s'adapter à des conduites de diamètre différents. Lorsque la fuite est importante, l'obturateur peut être plus rudimentaire et constitué, par exemple, d'un simple cylindre extrudé 13 de matière synthétique telle que le polystyrène créé à Pemporte-pièce et pourvu d'un système d'accrochage 14.The shutter 11 must be waterproof, sliding and light in order to reduce the friction on the walls of the pipe 4. For small leaks, it can advantageously be made modular thanks to interchangeable elastomeric sealing discs 12, in order to be able to adapt to pipes of different diameter. When the leak is significant, the shutter can be more rudimentary and constituted, for example, of a simple extruded cylinder 13 of synthetic material such as polystyrene created with a punch and provided with a hooking system 14.
La dérivation 9 est indispensable car il faut que la canalisation 4 soit en pression avant d'envoyer l'obturateur mobile 11 qui doit être en attente dans la zone interne 10, en tête de conduite. La distance entre l'obturateur et l'entrée d'air de la dérivation 9 sur la conduite doit être suffisante pour éviter que l'obturateur ne soit entraîné par la dépression lors du remplissage. Pour empêcher de façon certaine un déplacement intempestif de l'obturateur, on peut éventuellement prévoir une vanne de blocage 15 en aval de la zone interne 10 d'attente de celui-ci. Le raccordement de la dérivation peut s'effectuer au moyen d'un collier 16 de prise en charge sur la conduite 4.The bypass 9 is essential because the pipe 4 must be under pressure before sending the mobile shutter 11 which must be waiting in the internal zone 10, at the head of the pipe. The distance between the shutter and the air inlet of the bypass 9 on the pipe must be sufficient to prevent the shutter from being driven by vacuum during filling. To prevent any accidental movement of the shutter, it is possible to provide a blocking valve 15 downstream of the internal zone 10 waiting for the latter. The connection of the bypass can be made by means of a collar 16 for taking over the pipe 4.
L'ensemble est complété par un calculateur 17 constitué d'une cellule électronique munie d'un programme intégrant les données existantes telles que le diamètre et la longueur, ainsi que le temps de remplissage grâce au débitmètre 7 couplé au programme, ce qui permet au calculateur, après avoir analysé les données existantes de diamètre intérieur et de longueur de la conduite 4, d'établir un diagnostic sur la fuite.The whole is completed by a computer 17 consisting of an electronic cell provided with a program integrating the existing data such as the diameter and the length, as well as the filling time thanks to the flow meter 7 coupled to the program, which allows the computer, after having analyzed the existing data of internal diameter and length of pipe 4, to establish a diagnosis on the leak.
Le calculateur 17 permet également de déterminer le débit d'air optimal. Une fuite de faible débit nécessite le plein débit du compresseur 1 pour remplir la canalisation 4 afin de créer un équilibre et ensuite mouvoir l'obturateur 11 , alors que pour une fuite à fort débit il est préférable de réduire le débit du compresseur afin d'éviter l'usure de l'obturateur.The computer 17 also makes it possible to determine the optimal air flow. A low flow leak requires the full flow of the compressor 1 to fill the pipe 4 in order to create a balance and then move the shutter 11, whereas for a high flow leak it is preferable to reduce the flow of the compressor in order to avoid wear of the shutter.
A la fin du temps de remplissage et de stabilisation du coussin d'air le calculateur émettra un signal indiquant qu'il faut ouvrir la vanne 8, et éventuellement la vanne de blocage 15, ou pilotera directement cette ou ces vanne(s) s'il s'agit d'électrovanne(s). La cellule électronique pourra également actionner le débitmètre 7 pour réduire le débit si la fuite est trop importante afin d'éviter une trop grande vitesse de l'obturateur mobile 11.At the end of the filling and stabilization time of the air cushion, the computer will emit a signal indicating that it is necessary to open the valve 8, and possibly the blocking valve 15, or will directly control this or these valve (s) these are solenoid valve (s). The electronic cell can also actuate the flow meter 7 to reduce the flow rate if the leak is too great in order to avoid too high a speed of the mobile shutter 11.
Pour faciliter la mise en oeuvre du système, le calculateur 17 pourra avantageusement être logé dans un coffret mobile 18 regroupant le débitmètre 7, la vanne 8 et le manomètre 6 (figure 2).To facilitate the implementation of the system, the computer 17 could advantageously be housed in a mobile box 18 grouping together the flow meter 7, the valve 8 and the pressure gauge 6 (FIG. 2).
Le positionnement des divers éléments constitutifs donne à l'objet de l'invention un maximum d'effets utiles qui n'avaient pas été, à ce jour, obtenus par des systèmes similaires. The positioning of the various constituent elements gives the object of the invention a maximum of useful effects which had not, to date, been obtained by similar systems.

Claims

REVENDICATIONS
1 ° Méthode de détection de fuites sur réseaux étanches, destinée d'une manière générale aux conduits étanches de toute nature, qu'il s'agisse de réseaux d'eau potable, d'eau usée, ou de gaz ou de fourreaux étanches de tous types et en particulier ceux destinés aux fibres optiques, caractérisé en ce que l'on injecte, à la tête d'une conduite (4) dont on a bouché l'autre extrémité, de l'air sous pression durant un laps de temps suffisant pour créer un coussin d'air stable juste après la fuite, puis, à la fin du temps de remplissage et après stabilisation du coussin d'air, à utiliser le flux d'air persistant entre le point d'injection et la fuite pour entraîner un obturateur mobile (11) repérable de l'extérieur de la conduite jusqu'à l'emplacement de la fuite où il s'immobilisera en butant sur ledit coussin d'air.1 ° Leak detection method on sealed networks, generally intended for sealed conduits of any kind, whether they are drinking water, waste water, or gas or sealed ducts of all types and in particular those intended for optical fibers, characterized in that one injects, at the head of a pipe (4) the other end of which has been plugged, air under pressure for a period of time sufficient to create a stable air cushion immediately after the leak, then, at the end of the filling time and after stabilization of the air cushion, to use the persistent air flow between the injection point and the leak to drive a movable shutter (11) locatable from the outside of the pipe to the location of the leak where it will stop by abutting on said air cushion.
2°. Méthode de détection de fuites selon la revendication 1 , se caractérisant par le fait que durant le remplissage de la conduite (4) l'obturateur mobile est en attente dans une zone interne (10) en tête de conduite délimitée par une dérivation (9) branchée en amont d'une vanne (8) du tube (2) d'alimentation en air comprimé et raccordé à la conduite (4), en aval de la zone interne (10), la vanne (8) étant fermée durant le temps de remplissage qui s'effectue par la dérivation (9) de manière à ne pas entraîner l'obturateur mobile (11)2 °. Leak detection method according to claim 1, characterized in that during filling of the pipe (4) the mobile shutter is waiting in an internal zone (10) at the head of the pipe delimited by a bypass (9) connected upstream of a valve (8) of the compressed air supply tube (2) and connected to the pipe (4), downstream of the internal zone (10), the valve (8) being closed during the time filling which is carried out by the bypass (9) so as not to drive the movable shutter (11)
3° Méthode de détection de fuites selon l'une quelconque des revendications précédentes, se caractérisant par le fait que la position de la fuite est déterminée au moyen d'une sonde émettrice entraînée par l'obturateur mobile (11 ), et d'un détecteur externe approprié3. Method for detecting leaks according to any one of the preceding claims, characterized in that the position of the leak is determined by means of an emitting probe driven by the mobile shutter (11), and of a suitable external detector
4° Méthode de détection de fuites selon l'une quelconque des revendications 1 et 2, se caractérisant par le fait que la position de la fuite est déterminée au moyen d'un fil métrique entraîné par l'obturateur mobile ( 1)4 ° Leak detection method according to any one of claims 1 and 2, characterized in that the position of the leak is determined by means of a metric wire driven by the movable shutter (1)
5° Méthode de détection de fuites selon l'une quelconque des revendications précédentes, se caractérisant par le fait que le système de détection est piloté par un calculateur (17) pourvu d'un programme intégrant les données existantes telles que le diamètre et la longueur de la conduite (4), ainsi que le temps de remplissage grâce à un débitmètre (7) couplé au dit programme.5 ° Leak detection method according to any one of previous claims, characterized in that the detection system is controlled by a computer (17) provided with a program integrating existing data such as the diameter and the length of the pipe (4), as well as the filling time through a flow meter (7) coupled to said program.
6°. Dispositif de détection de fuites sur réseaux étanches, destiné à appliquer la méthode selon les revendication précédentes, caractérisé en ce qu'il est constitué d'une source d'air comprimé telle que compresseur (1) alimentant grâce à un tube (2), un embout (3) monté à la tête de la conduite (4) à tester dont l'extrémité opposée est obturée par un bouchon (5), un manomètre (6) de contrôle, un débitmètre (7) et une vanne (8) étant disposés le long du tube (2) et une dérivation (9). branchée en amont de la vanne (8) étant raccordé à la conduite (4), à une certaine distance de l'embout (3) de façon à délimiter en tête de ladite conduite une zone interne (10) d'attente pour l'obturateur mobile (11).6 °. Leak detection device on sealed networks, intended to apply the method according to the preceding claims, characterized in that it consists of a source of compressed air such as compressor (1) supplying by means of a tube (2), a nozzle (3) mounted at the head of the pipe (4) to be tested, the opposite end of which is closed by a plug (5), a pressure gauge (6), a flow meter (7) and a valve (8) being arranged along the tube (2) and a bypass (9). connected upstream of the valve (8) being connected to the pipe (4), at a certain distance from the nozzle (3) so as to delimit at the head of said pipe an internal zone (10) waiting for the mobile shutter (11).
7°. Dispositif selon la revendication 6, se caractérisant par le fait que l'obturateur mobile (11) comporte des disques élastomères (12) d'étanchéité interchangeables de façon à être modulable.7 °. Device according to claim 6, characterized in that the movable shutter (11) comprises elastomeric discs (12) interchangeable sealing so as to be modular.
8°. Dispositif selon la revendication 6, se caractérisant par le fait que l'obturateur mobile (11) est destiné à la détection de fuites importantes et qu'il est constitué d'un simple cylindre extrudé 13 de matière synthétique créé à Pemporte-pièce et pourvu d'un système d'accrochage 14.8 °. Device according to claim 6, characterized in that the movable shutter (11) is intended for the detection of significant leaks and that it consists of a simple extruded cylinder 13 of synthetic material created with the punch and provided a hanging system 14.
9°. Dispositif selon l'une quelconque des revendications 6 à 8, se caractérisant par le fait qu'une vanne de blocage 15 est disposée en aval de la zone interne 10 d'attente de l'obturateur mobile (11) de manière à empêcher de façon certaine un déplacement intempestif dudit obturateur mobile.9 °. Device according to any one of claims 6 to 8, characterized in that a blocking valve 15 is arranged downstream of the internal zone 10 waiting for the movable shutter (11) so as to prevent so certain an untimely movement of said movable shutter.
10°. Dispositif selon l'une quelconque des revendications 6 à 9, se caractérisant par le fait que le raccordement de la dérivation (9) sur la conduite (4) est effectué au moyen d'un collier (16) de prise en charge.10 °. Device according to any one of Claims 6 to 9, characterized in that the connection of the bypass (9) to the pipe (4) is carried out by means of a support collar (16).
1 1 °. Dispositif selon l'une quelconque des revendications 6 à 10, se caractérisant par le fait que qu'il est équipé d'un calculateur (17) destiné à piloter le système de détection de fuites et pourvu d'un programme intégrant les données existantes telles que le diamètre et la longueur de la conduite (4).1 1 °. Device according to any one of claims 6 to 10, is characterized by the fact that it is equipped with a computer (17) intended to control the leak detection system and provided with a program integrating existing data such as the diameter and the length of the pipe (4).
12°. Dispositif selon la revendication 1 , se caractérisant par le fait que le calculateur (17) est disposé dans un coffret mobile (18) regroupant le débitmètre (7), la vanne (8) et le manomètre (6). 12 °. Device according to claim 1, characterized in that the computer (17) is arranged in a mobile box (18) grouping together the flow meter (7), the valve (8) and the pressure gauge (6).
PCT/FR2001/002097 2001-06-29 2001-06-29 Method and device for detection of leaks in a sealed network WO2003002971A1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006007806A1 (en) * 2004-07-21 2006-01-26 Gerd Scholz Method for locating leaks
GB2435329A (en) * 2006-02-16 2007-08-22 Keith Reed Fluid leak detection
US10753820B2 (en) 2011-05-04 2020-08-25 Optasense Holdings Limited Integrity monitoring of conduits

Citations (3)

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US3903730A (en) * 1973-11-05 1975-09-09 Exxon Production Research Co Method of locating pipeline leaks with a one-way pig
WO1999008087A1 (en) * 1997-07-22 1999-02-18 Michael George Ingham Leak tracing
US5918271A (en) * 1998-02-11 1999-06-29 Mcguigan; James Deturck Pipe leak location detecting apparatus and repair method

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WO2006007806A1 (en) * 2004-07-21 2006-01-26 Gerd Scholz Method for locating leaks
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
US10753820B2 (en) 2011-05-04 2020-08-25 Optasense Holdings Limited Integrity monitoring of conduits

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