WO2007006693A1 - Device for position-dependently detecting a leak in a hidden externally-inaccessible pipeline system - Google Patents

Device for position-dependently detecting a leak in a hidden externally-inaccessible pipeline system

Info

Publication number
WO2007006693A1
WO2007006693A1 PCT/EP2006/063869 EP2006063869W WO2007006693A1 WO 2007006693 A1 WO2007006693 A1 WO 2007006693A1 EP 2006063869 W EP2006063869 W EP 2006063869W WO 2007006693 A1 WO2007006693 A1 WO 2007006693A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
measuring
flow
ultrasonic
system
control
Prior art date
Application number
PCT/EP2006/063869
Other languages
German (de)
French (fr)
Inventor
Patrick Oudoire
Achim Wiest
Original Assignee
Endress+Hauser Flowtec Ag
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

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26Investigating 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
    • G01M3/28Investigating 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
    • G01M3/2807Investigating 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
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/24Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations
    • G01M3/243Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations for pipes

Abstract

The invention relates to a device for position-dependently detecting a leak in a hidden and externally-inaccessible pipeline system (2), wherein ultrasound-flowrate measuring points (3) are positioned at the defined points of the pipeline system (2), at least one external adjusting/evaluation unit (4) is connected to the flowrate measuring points (3) from the outside and provides information about the flowrate at the defined points of the pipeline system (2) and the leak is located in the area between the flowrate measuring points (3) of the pipeline system (2) by comparing flowrate values determined at the different defined points of said pipeline system (2).

Description

description

A device for position-dependent detection of a leak in a hidden, inaccessible from outside the piping system

[0001] The invention relates to a device for position-dependent detection of a leak / a tributary in a hidden, inaccessible from outside the piping system.

[0002] In the drinking and waste water supply piping systems are often buried deep in the ground. If a malfunction occurs in the form of a leak or a blockage, it is usually necessary to excavate the pipeline system over long distances to locate the defect.

[0003] The invention has for its object to locate a defect in a pipeline system targeted.

[0004] The object is achieved in that ultrasonic flow measuring points are provided at several defined points of the pipeline system, that at least one external control / evaluation unit is provided which is connectable from the outside with the flow measuring points, wherein the control / evaluation unit provides information about the flow rate at the defined points of the pipeline system are available, and limits the leakage to the area between two defined points of the pipeline system based on a comparison of the defined at different locations in the pipeline system determined flow values.

[0005] According to the invention therefore be in the conduit system at predetermined

Intervals prefabricated ultrasonic flow measuring points mounted. This produces a surface covering monitoring of the pipeline system can be achieved. If a malfunction occurs on the pipeline system with one or more with a plurality of control / evaluation unit is checked. The control / evaluation units are preferably designed as portable measuring devices.

[0006] Ideally, the review is with at least two measuring devices, which are preferably in direct radio communication with each other, so that the measurement data provided by the two measuring devices can be compared directly. Alternatively, the measuring data supplied by the measuring points can be recorded by a data logger and are compared to the diameter value detection at the individual buried flow measuring points off-line.

[0007] To a leak in a pipeline system to determine two approaches are possible in principle:

- Usually the normal consumers that are connected to the piping system are shut down at night, so that at least approximation can be assumed approximately that exits only through the leak medium from the piping system. The leakage can be detected by means of a portable control / evaluation unit then, via which the flow is determined in the pipe system at different locations.

During normal operation of the pipeline system, so when ent-taken on consumer medium from the pipeline system, at least two successive flow-measuring points are measured simultaneously. The measured data are compared. This can / occur evaluation units in real time, both via a wireless and a wired connection between the two of the pipe system connected control; But it is also possible to use a data logger, which records the data and allows for future evaluation or a comparison of the measured data.

[0008] If there is a leak in the piping system before, so this is reflected again in the measured at different points of the pipeline system flow rates. The flow in a connected pipeline system corresponds according to the Kirchhoff node rule, the sum of all outgoing at a selected point of the pipeline system through-flows plus the loss of the leak. Is the sum of the outgoing flows in the piping system is known, so the loss may be determined locally narrowed due to a leak. [0009] A plug or a blockage will affect in the piping system so that the pipe is filled up to the fastener with medium, while it is behind the closure only partially filled or empty. The current filling a pipeline can be determined via ultrasonic measuring signals in a simple manner by the ultrasonic sensors and an ultrasonic sensor is attached to a location that is interrupted or when a partially filled pipe with another medium, such beispiels- as air, is filled. At a level measurement by means of the ultrasonic measuring signals, for example, transmitted through the medium of sound energy can be measured. Is a comparison value before at a filled or partly filled pipeline, it can be on the measurement of the transmitted acoustic energy between a transmitting and a receiving ultrasonic sensor the respective state of the pipeline detect. a level determination is possible also addition, to carry out by means of an ultrasonic Doppler measurement with only one ultrasonic sensor. In the Doppler measurement, the reflectance is measured at the interface between the ultrasonic transducer and the material due to the process. Is an exact statement about the respective level in the pipeline is required, this is possible with the known echo method. [0010] In summary, one can say the following: As an advantageous combination-hang with the present invention, it is considered, as each detector for detecting the filling level is provided in the pipe system at least some of the flow measuring point. The detector is, for example, be an ultrasonic sensor which is disposed in the upper region of the pipeline. the ultrasonic measuring signals are preferably emitted perpendicular to the longitudinal axis of the pipeline or of the measuring tube or received.

[0011] According to an advantageous and cost-effective embodiment of the device according to the invention is in the ultrasonic flow measurement points are passive ultrasonic flow measuring points, which have an access to the external control / evaluation unit each have a tubular connecting part. the flow measuring points are preferably equipped with ultrasonic sensors, which are driven by means of electrical signals from the external control / evaluation forth. The connecting lines are preferably guided via tubular, buried into the ground connecting parts. With the connecting parts is, for example, fiberglass reinforced plastic pipes or pipes made of concrete, so to pipes with a high resistance.

[0012] A passive ultrasonic flow measurement point means a measuring point without control / evaluation and without its own energy supply in this case. However, in the measuring point, the passive ultrasonic sensors are integrated, so in particular, the piezoelectric elements, which are driven by the electrical measurement signals from the control / evaluation unit here, the ultrasonic generating measurement signals or received and their flow measurement data in the form of electrical lead signals via the connecting lines to the control / evaluation unit.

[0013] According to an alternative embodiment of the device according to the invention have the passive ultrasonic flow measuring points, only the openings for positioning the ultrasonic sensors; The ultrasonic sensors are thus no longer permanently integrated into face-flow measuring point, but they are incorporated as needed from the outside via the tubular connection member in the openings and positioned there. The positioning must be done so that the ultrasonic sensors close the opening tightly, so that no medium can escape from the pipeline; as care must be taken that the openings are sealed with non-mounting of the ultrasonic sensors. The inserted through the tubular connecting part ultrasonic sensor is pressed on a coupling surface with a defined force so that there is no gap between the ultrasonic sensor and of the receiving opening is present. Incidentally, it is preferable a coupling fluid, used as water. The contact pressure with a de- fϊnierten force can for example be realized via correspondingly arranged magnets.

[0014] The use of passive flow measuring points represents a very inexpensive solution, but the invention is by no means limited to the use of passive flow measuring points. An advantageous embodiment of the device according to the invention provides that it is in the ultrasonic flow measuring points to active flow measuring points, which can be connected via electrical connection lines to the control / evaluation unit. In particular, it is provided that each ultrasonic flow measuring point own control / evaluation unit and / or its own power supply (eg a battery) are associated with / is.

[0015] In connection with the last-mentioned variant of the device Inventive invention it is proposed that each control / evaluation flux measured values ​​an interface for wireless data transmission of the throughput calculated on a flow-measuring point to a higher-level control unit or another control / evaluation unit which is associated with another flow measuring point has. Wireless data transmission comprises the transmission by radio - both visually or by sound.

[0016] the hidden or buried flow measuring point on the external evaluation / control unit is preferably supplied with energy. Alternatively, it is also possible that the control / evaluation unit has an energy store which can be supplied via an inductive or capacitive coupling of energy. To save energy, the control / evaluation unit controls the flow measuring point in accordance with an advantageous development of the inventive device intermittently in such a way that the flow measuring point and certain components of the flow measuring point only required during a measuring phase energy or need, while they do not consume energy during the rest phase and go on standby. Among the components with high energy requirements, which are only active during the measurement phase, it is, for example, an amplifier.

[0017] The invention is further illustrated by the following figures. It shows:

[0018] FIG. 1 is a perspective view of a preferred embodiment of the device according to the invention,

[0019] FIG. 2 shows an enlarged detail of the embodiment shown in Figure 1.

[0020]

[0021] FIG. 3 shows a second embodiment of the device according to the invention and

[0022] FIG. 4 shows an embodiment of the inventive apparatus with integrated level sensor.

[0023] Fig. 1 shows a perspective view of a preferred execution form of the inventive device 1. In Figure 2, the flow measuring point 3 of FIG. 1 is shown enlarged.

[0024] The piping system 2 with the ultrasonic flow measuring point 3 is

Soil buried. 9 The ultrasonic flow measuring points 3 are integrated into pre-given intervals in the piping system. 2 The ultrasonic conductance Flow rate measuring points 3 have in the case shown in the tube wall 6 has two openings 7, through which the ultrasonic measuring signals are 16 zoom in the interior of the measuring tube and led out.

[0025] In the ultrasonic flow measuring point 3 is, for example, a passive flow measuring point 3 at which the ultrasonic sensors 8 are integrated for the generation and reception of the ultrasonic measuring signals in the measuring tube sixteenth The signal lines / connecting lines 17 between the ultrasonic transducers 8 and the control / evaluation unit 4 are guided in the two tubular connecting parts. 5 The connecting parts 5 are made of a resistant material. The ultrasonic sensors 8 essentially comprise piezoelectric elements and corresponding coupling elements for optimized / drop of the ultrasonic measuring signals into or from the medium 19th

[0026] The connection point 18, via which the contact between the control / evaluation unit 4 and the ultrasonic flow measuring point 3, if necessary be produced is arranged so that it is easily accessible from the outside.

However, [0027] Alternatively, the passive ultrasonic flow measuring points can also be designed such that the openings 7 not used for receiving ultra-sound sensors 8, but only for coupling in or out of the ultrasonic measuring signals from the measuring tube sixteenth The tubular connecting lines 5 are configured as a waveguide. A further alternative embodiment provides that the ultrasonic sensors 8 out when required by the tubular connecting parts 5 to the openings 7 of the measuring tube 16 and be positioned there by a magnet closure for example. Upon completion of the measurement, the ultrasonic sensors are 8 removed from the flow measuring point. 3 The use of passive ultrasonic flow measuring point 3 is that it is possible thereby to realize a very cost-effective leakage detection system in a concealed or buried pipe system 2 has the advantage.

[0028] If there is a leakage in the pipe system 2 is present, this is reflected again in the measured at the different measuring points of the pipeline system 3 2 Flow values. The flow in a connected pipe system 2 corresponds according to the Kirchhoff's control node to the sum of all outgoing at a selected point of the pipe system 2 flows plus the loss of the leak. Is the sum of the outgoing flows in the pipe system 2 is known, the loss can be limited locally due to a leak can be determined.

[0029] As mentioned at previous point can be with the inventive device 1 also blockages in the pipe system 2 specifically recognize. A closure or a blockage will affect in the piping system 2 so that the pipe is filled with medium 2 to the shutter 19, while it is behind the closure only partially filled or empty. The instantaneous filling of a pipeline 2 can be determined on ultrasonic measuring signals in a simple manner by the ultrasonic sensors 13 and an ultrasonic sensor 13 disposed at a position interrupted in a partly filled pipeline 2, or with another medium 19 which, as is filled, for example air. At a level measurement using ultrasonic measuring signals, for example, transmitted through the medium 19 the sound energy can be measured. Is a comparison value before at a filled or partly filled pipeline 2, it can be sound sensor via the measurement of the transmitted acoustic energy between a transmitting and a receiving Ultra- 13 of the respective state in the pipeline 2 detect. a level determination is possible also addition, to carry out by means of an ultrasonic Doppler measurement with only one ultrasonic sensor. 13 In the Doppler measurement, the reflectance at the interface between the ultrasonic sensor 13 and the medium 19 is measured due to the process. Is an exact statement about the respective level of the medium 19 in the pipeline 2 is required, this is possible with the known echo method. In FIG. 4, an embodiment of the inventive apparatus with integrated level sensor is shown the way.

[0030] FIG. 3 shows a second embodiment of the inventive apparatus 1. In the flow measuring point 3 is, in the illustrated case preferably an active flow measuring point 3 on their ultrasonic sensors. The connection between the arranged outside the soil 9 control / evaluation unit 4 and the buried or concealed ultrasonic measuring point 3 takes place by radio. can be omitted in this embodiment, the tubular connecting parts. 5 The communication between the ultrasonic flow measuring point 3 and the control / evaluation unit 4 via the arranged outside the soil 9 first coil 15a, which is associated with, for example, the mobile control / evaluation unit 4, and which is arranged in the ground 9 coil 15b the flow measuring point is assigned. 3 Communication here means both exchange of measurement data and measurement signals and the supply of energy.

[0031] LIST OF REFERENCE NUMBERS

Apparatus [0032] 1 according to the invention

[0033] 2 piping / tubing [0034] 3 flow measuring point

[0035] 4 control / evaluation unit

[0036] 5 tubular connecting line

[0037] 6 tube wall

[0038] 7 opening

[0039] 8 ultrasonic sensor

[0040] 9 soil / soil

[0041] 10 Connection line

[0042] 11 Interface

[0043] 12 control unit

[0044] 13 detector for level measurement

[0045] 14 energy storage

[0046] 15 coupling

[0047] 16 measuring tube

[0048] 17 Connection line / signal line

[0049] 18 connecting point

[0050] 19 medium

Claims

claims
[0001] 1. A device for position-dependent detection of a leak in a hidden, inaccessible from outside the piping system (2), wherein points of the pipeline system (2) at defined ultrasonic flow measuring points
(3) are provided, wherein at least an external control / evaluation unit (4) is provided which can be connected from the outside with the flow measuring point (3), wherein the control / evaluation unit (4) information about the flow rate at the defined sites of the piping system (2) provides and based on a comparison of the defined at different locations in the piping system (2) determined flow measurements limits the leakage to the area between two defined flow measuring points (3) of the pipe system (2).
[0002] 2. The apparatus of claim 1, wherein the ultrasonic
Flow measuring points (3) are passive ultrasonic flow measuring points (3), each having a tubular connecting part (5) an access to the external control / evaluation unit (4).
[0003] 3. Device according to claim 1 or 2, wherein the passive ultrasonic
Flow measuring points (3) Ultrasonic sensors (8) which are each controlled via the control / evaluation unit (4) and the tubular connecting part (5).
[0004] 4. The device according to claim 1 or 2, wherein the passive ultrasonic
Flow measuring points (2) has openings (7) for positioning the ultrasonic sensors (8) and wherein the ultrasonic sensors (8) on the tubular connecting parts (5) in the openings (7) are positioned.
[0005] 5. The device according to claim 1 or 2, wherein the ultrasonic
Flow measuring points (2) to active flow measurement points (2) is connectable via connecting lines (10) with the control / evaluation unit (4).
[0006] 6. The device according to one or more of the preceding claims, wherein each ultrasonic flow measuring point (2) has its own control / evaluation unit
(4) is assigned.
[0007] 7. The device according to claim 6, wherein each control / evaluation unit (4)
Interface (11) for wireless data transmission of at a flow measuring point (2) determined flow data to a higher-level control unit (12) or to another control / evaluation unit (4) which is associated with another flow measuring point (2), comprising.
wherein at least some of the flow measuring point (2) is provided in each case a detector (13) for detecting the filling level in the pipe system (2) 7 - [0008] 8. The device according to at least one of Claims. 1
[0009] 9. The device according to claim 6 or 7, wherein the control / evaluation unit (4) has an energy store (14) which can be supplied via an inductive or capacitive coupling (15) with energy.
[0010] 10. The apparatus of claim 6, 7 or 9, wherein the control / evaluation unit
(4) the flow measuring point (2) in such intermittent, that the flow measuring point (2) is supplied only during a measuring phase with energy, while it is no energy available during the rest phase.
PCT/EP2006/063869 2005-07-07 2006-07-04 Device for position-dependently detecting a leak in a hidden externally-inaccessible pipeline system WO2007006693A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE200510032132 DE102005032132A1 (en) 2005-07-07 2005-07-07 A device for position-dependent detection of a leak in a hidden, inaccessible from outside the piping system
DE102005032132.1 2005-07-07

Publications (1)

Publication Number Publication Date
WO2007006693A1 true true WO2007006693A1 (en) 2007-01-18

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WO (1) WO2007006693A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8234911B2 (en) 2007-08-03 2012-08-07 Areva Np Gmbh Method and apparatus for detecting a leak in a double pipe

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016212821A1 (en) * 2016-07-13 2018-01-18 Martin Weinläder Device for receiving data

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US4066095A (en) * 1976-02-17 1978-01-03 Fred M. Dellorfano, Jr. Automatic leakage detection system for pipelines carrying fluids
US20030204338A1 (en) * 2002-04-22 2003-10-30 Peter Martinek Method and measurement probe for the performance of measurements in water supply systems

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DE9010216U1 (en) * 1990-07-05 1990-09-27 Weiss, Erhard, 4920 Lemgo, De
DE19737394C2 (en) * 1997-08-27 2003-02-27 Schubert & Salzer Control Syst System and method for determining a disturbance in the refrigerant circuit
DE19835621C1 (en) * 1998-08-06 2000-01-27 Flughafen Muenchen Gmbh Monitoring system for a pipeline system has a computer to produce a warning signal and transfer it to receiving units
DE29924368U1 (en) * 1999-10-06 2003-02-20 Schoepf Alfred Flowmeter inspection method for flowmeter build into pipeline system, involves comparing detected measurement result of flowmeter with input signal corresponding to amount of fluid flowing in pipeline system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4066095A (en) * 1976-02-17 1978-01-03 Fred M. Dellorfano, Jr. Automatic leakage detection system for pipelines carrying fluids
US20030204338A1 (en) * 2002-04-22 2003-10-30 Peter Martinek Method and measurement probe for the performance of measurements in water supply systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8234911B2 (en) 2007-08-03 2012-08-07 Areva Np Gmbh Method and apparatus for detecting a leak in a double pipe

Also Published As

Publication number Publication date Type
DE102005032132A1 (en) 2007-01-18 application

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