WO1998008069A1 - Verfahren zur ortung undichter stellen in rohrleitungen und rohrleitungssystem, insbesondere für die übertragung von fernwärme - Google Patents
Verfahren zur ortung undichter stellen in rohrleitungen und rohrleitungssystem, insbesondere für die übertragung von fernwärme Download PDFInfo
- Publication number
- WO1998008069A1 WO1998008069A1 PCT/EP1996/003618 EP9603618W WO9808069A1 WO 1998008069 A1 WO1998008069 A1 WO 1998008069A1 EP 9603618 W EP9603618 W EP 9603618W WO 9808069 A1 WO9808069 A1 WO 9808069A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- location
- switch
- switches
- pipe
- resistance
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000012937 correction Methods 0.000 claims abstract description 8
- 238000005259 measurement Methods 0.000 claims description 27
- 239000004020 conductor Substances 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000009413 insulation Methods 0.000 claims description 5
- 238000004904 shortening Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 19
- 229910052802 copper Inorganic materials 0.000 abstract description 18
- 239000010949 copper Substances 0.000 abstract description 18
- 230000008569 process Effects 0.000 abstract description 3
- 239000000945 filler Substances 0.000 abstract description 2
- 230000004807 localization Effects 0.000 abstract 7
- 239000012530 fluid Substances 0.000 abstract 1
- 238000004804 winding Methods 0.000 description 6
- 229910018487 Ni—Cr Inorganic materials 0.000 description 4
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000000691 measurement method Methods 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
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
- G01M3/04—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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
-
- 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
- G01M3/002—Investigating fluid-tightness of structures by using thermal means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
Definitions
- Piping systems for the transmission of district heating or other liquid media are known. They usually contain an inner pipe that carries the medium, an outer pipe surrounding the inner pipe with a spacing, and filler material in the space between the two pipes for thermal insulation.
- the filling material consists for example of polyurethane.
- Leakages in the piping system can cause energy losses as well as extensive damage. It is therefore common to constantly monitor such piping systems.
- sensor elements directly into the space between the inner pipe and the outer pipe, that is to say into the thermal insulation.
- Such sensors are matched to the measurement technology used. They essentially contain electrical conductors. If the inner tube leaks, liquid will penetrate into the space. The moisture caused by this is determined by the sensor. The leakage point can be detected and located by electrical measurement of the impedance, the conductivity or the increased conductivity of the filling material which is not or poorly conductive per se but has become conductive due to the moisture.
- Different systems and methods with usually two conductors are known and customary for the detection and location of such leaks.
- a conductor consists of nickel chromium (NiCr) and is relatively high-resistance at 5.7 ohms / meter, so it has a high specific resistance.
- the location of the leak is carried out according to the resistance measuring method, by measuring the ohmic resistance between this NiCr conductor and a low-resistance second conductor, conductive tube or earth and determining the location of the fault location according to the principle of the unloaded voltage divider.
- This method is advantageous for construction supervision, enables precise, early location and preferably indicates the source of the error. This known method is called abbreviated resistance location below.
- the leak is located by measuring the transit time of a pulse that is reflected at the wet point that has become low-resistance.
- this measuring method known from cable measurement technology, two low-resistance uninsulated copper wires are used as sensors. The location is between the conductor and the pipe.
- This method is advantageous in the case of a relatively late location, if the fault has already progressed well, that is to say when the fault locations are already very damp and the damage is severe, and preferably indicates the limits of the damage.
- this known method is abbreviated to runtime location.
- the two measurement methods described are based on different principles.
- the first measuring method is more suitable for less moist defects and has a limit in the direction of very moist defects.
- the second measuring method is particularly suitable for very moist defects and has a limit of use towards less moist defects. So far, both measuring methods have been used alternatively, depending on the user's requirements.
- the sensors for the two measuring methods have to meet opposite conditions, namely, one with medium resistance and one with high resistance.
- a piping system is known (DE 41 24 640 AI) with which the advantages of both measuring methods can be combined.
- This known piping system contains three conductors of different resistances and therefore pipeline materials. For example, NiCr is used for one conductor and bare copper or insulated copper for the other two conductors. There is still no agreement on this system.
- a manufacturer group has proposed a standard for all parties involved (FWI 9/94), which in the future should only provide two copper conductors for the sensor. This standard may be useful for locating the runtime, but it is almost unsuitable for locating the resistance. In the case of fluctuating pipe temperatures, false readings can be drawn due to the high temperature coefficient. In addition, due to the low volume resistance of the copper lines, defective or defective connection points can replace wire lengths and thus cause a displacement and thus falsification of the location. Since the measurement technology according to the principle of the unloaded voltage divider offers considerable advantages, as explained above, the new proposal for a standard has met with considerable criticism (Energie & Management 12/94, pages 28-31).
- the invention has for its object to make the measurement method of resistance location applicable to piping systems with sensors made of lines that, like copper, have so far precluded reliable application.
- This object is achieved by the invention characterized in claim 1. Further training is defined in the subclaims.
- the invention is that switches are assigned to the sensor line at one or more predetermined points of the pipeline, which switches can establish a low-resistance connection between the sensor line and the pipeline for the simulation of a fault point, and / or temperature measuring sensors which have an influence of different temperatures specify the resistance of the sensor cables at predetermined points.
- the switch is preferably designed to be remotely controllable.
- a location method for example the resistance location
- the switched connection should preferably be extremely low-resistance compared to all other possible faulty contacts or moisture. Due to the low resistance (10 Ohm / km) of a copper line, an additional resistance of only 1 Ohm resulted in a location error of 100 when locating the resistance.
- the known route and the known locations of the switch or switches distributed over the route can be used to determine and introduce correction values for the location. In the same way, it can also be recognized whether the sensor is at all or still suitable for location.
- both the runtime location and the resistance location can be carried out.
- Conductors with a comparatively low resistance value such as copper can be used for the resistance location by the invention. This also applies if this conductor, like copper, has a high temperature coefficient and the different temperatures in the feed pipe or in the return pipe could exchange different resistance values and thus, due to the influence of even small changes in resistance, different locations of a possible error. This means that every user of pipelines has faulty locations at all times Can locate and test piping with sensor conductors made of copper using both known location methods.
- fault points or the points of high contact resistance can be located or circled in terms of their position by the switches distributed over a route or by the simulation points which can be switched on by means of the switches.
- every operator of pipelines is able to determine any possible structural damage to the pipeline immediately after the pipeline has been completed, even before commissioning, and also with sensor lines that, due to their material properties, have previously prevented the use of resistance detection.
- Another improvement of the measurement which makes the use of resistance location with copper sensors possible, can be achieved by the above-mentioned measurement of the temperature of the pipes separately according to flow and return, because this enables arithmetical positional deviations to be compared via the temperature coefficient. This method of measurement improves the accuracy of the location.
- This measurement method can also enable the use of the copper sensor conductors for resistance detection, even without the switches, but also ensures even better monitoring when connected to the switches.
- the switch according to the invention is preferably a remotely controllable switch which can be switched on centrally from a central station or from the beginning of the measuring loop.
- the switch can also be one switch automatic operation automatically at predetermined times and also maintain the switching state for a predetermined period of time.
- the electronics for the switch can be operated by its own battery at the location of the switch or can be supplied with energy via the sensor lines as a circuit or between wire and tube.
- the electronics for the switch can be operated by its own battery at the location of the switch or can be supplied with energy via the sensor lines as a circuit or between wire and tube.
- 50 or 60 Hz as the usual AC voltage, it is also possible to use any other frequency at the same time to reduce the risk of corrosion and to identify the pipe route.
- 1 shows the cross section of a district heating line with inner tube, outer tube and sensor lines
- Fig. 3 shows a resistance location with switch
- FIG. 5 shows the influence of temperature on the location results
- FIG. 6 shows another embodiment of the switch control
- FIGS. 7 and 8 shows the influence of line shortening on double effects
- Fig. 9 shows a measuring device with improved location by shortening the sensor line.
- the 1 shows a pipe system with the cross section of a district heating pipe R, which contains an inner pipe 1, an outer pipe 2 and two sensor lines 4, 41.
- the outer tube 2 can also enclose a further inner tube (not shown) intended for the return flow.
- the space between the inner tube 1 and outer tube 2 is one with the Emfullung fullmate ⁇ al 3, eg a polyurethane (PU), filled.
- the sensor 4 is arranged in the full material 3 and consists of copper or another conductive material suitable for sensor lines.
- a switch 5 is arranged at a predetermined point of the line R, preferably at an accessible point in shafts or buildings, which in the open state does not have any.
- Change of the measuring process causes, but in the closed state, an error of considerable magnitude, namely a connection as mediohm as possible between the inner tube 2 and sensor 4 simulated.
- a predetermined point for example, the center of the line R is provided between two usual measuring points of a route, which for example are at a distance of up to 1000 m from one another. Therefore, if the switch 5 is closed and an error is simulated, the error can be located using the usual measurement methods, that is to say the resistance location and / or the runtime location. Deviations of the simulated fault location located with the known measuring methods from the known actual position can be used as a correction variable for the measurement of fault locations caused by moisture. Each switch 5 is therefore assigned to a locally predetermined location.
- the sensor line 4 is connected to a contact of the switch 5, the other contact of which is directly connected to the inner tube 1, in order to be able to connect the sensor line 4 directly to the inner tube 1 in a median-resistance manner.
- the switch 5 can be remotely controlled or closed automatically, if necessary at predetermined times. It can be part of a relay arrangement that is operated by its own battery and time control or via the sensor line 4 with energy and remote control.
- a district heating network can consist of many such routes with a total cable length of 100 km, for example. Then each of these routes can be provided with measuring points and simulation switches and enable safe and easy monitoring or location of fault points. Fig.
- FIG. 2 shows the P ⁇ nzipdar ein a district heating system with heat source W and a district heating line R with two adjacent outer pipes 2V and 2R for back and forth and the two actual inner pipes IV and 1R intended for heat transport and the sensor line pairs 4, 41 and the switch 5 , which is arranged in a house H with the heat consumer WV and connects the inner tube 1 to the sensor line 4.
- a building G with another heat consumer WV2 and another switch 5 is shown in this figure.
- Fig. 3 shows the P ⁇ nzipdar ein a location system for a district heating line with resistance location.
- the outer tube is omitted in this figure and only the sensor lines 4, 41 next to the inner tube 1 are shown.
- a plurality of switches 5 which are distributed over the line R and can be switched individually can also be provided.
- a voltage source 6 feeds the start A of the sensor line 4 and the inner tube 1 directly or via one or each of a switch 7.
- Resistors RI, R2 and a measuring device 8 are indicated as a location device. However, a runtime location or both location systems can also be provided.
- Each switch 5 is assigned to a predetermined location on the route or line R.
- the sensor line 4 or a loop 8 of the sensor line 4 is connected to a contact 9 of the switch 5.
- the other contact 10 is connected directly to the inner tube 1 in order to be able to connect the sensor line 4 directly to the inner tube 1 in a low-ohmic manner.
- one or the second sensor line 41 can also be used.
- a control circuit 11 can be arranged parallel to the switch 5.
- the switch 5 and the circuit 11 are preferably part of a relay 12 which is supplied with energy by a battery (not shown) or via one of the lines 1, 2, 4, 41 and / or is controlled.
- the relay 12 It is possible, for example, to provide the relay 12 with its own battery, rechargeable battery or the like and to control it from the central station 13 with a closing command in order to activate the simulated fault location at the predetermined, that is to say precisely known, location.
- the switches 5 or relays 12 can be controlled selectively by the control circuit 11, for example via different frequencies or codings. They have corresponding selective reception circles and the control commands are dimensioned accordingly.
- a microprocessor determines 5 correction values from the deviations from the measured location and the predetermined, known position of the switch and one at location really leaky point F is taken into account accordingly. If an error resistor RF between sensor line 4 and inner tube 1 therefore becomes effective due to a real error, the location of the error resistor RF with resistance location can also be located inaccurately with a sensor 4 made of copper wire and precisely determined by the correction value. So that the sensor line 4 can always be contacted by the moisture, the sensor line 4 is bare or provided with perforated insulation.
- FIG. 4 shows an exemplary embodiment of a pipeline R in the area of a consumer connection H or G in FIG. 3, that is to say during the transition from a supply pipe IV to a return pipe 1R.
- the outer tube 2R is omitted for simplification.
- the heat consumer WV1 fed by the inner conductor 1 is only indicated between the tubes IV and 1R.
- the tubes 1 V and 1R are surrounded by various outer tubes 2V and 2R. A common outer tube 2 is also possible.
- Sensor lines 4 are assigned to both inner tubes IV and 1R.
- the length of the inner conductor is 1V + 1R and the length of the sensor lines 4 (FA + RA) for each section twice as long as the length of the respectively assigned pipeline R from the input A (m F g.2) to the consumer connection WVl at 17.
- the switch 5 assigned to the consumer connection at 17 therefore became the simulated error of a predetermined point for the switch with homogeneous distribution 5 Assign the length of the inner tube (1V + 1R) at 50 °.
- the ends 15 and 16 of the sensor lines 4 (FA or RA) are used in FIG. 4 not only for location, but also for signal transmission for the control of the switch 5.
- both ends 15, 16 are each with one end of a winding 18 of a transformer 19, whose other winding 20 controls electronics 11 for activating or switching the switch 5.
- a capacitive coupling can also be appropriate.
- an alternating voltage U is supplied to the input of sensor 4.
- the switch 5 is assigned to one end of the transformer winding 18 and a further switch 51 to the other winding end, and at the same time both switches 5, 51 are connected to the input or output of the consumer WV1.
- a third switch 52 is arranged such that it bridges the above-mentioned winding 18 or the consumer WV1.
- Each of these three switches is preferably via its own relay or the like. separately controllable. This in turn can be controlled by different frequencies or codes.
- the switch 52 is controlled in such a way that it practically short-circuits the winding 18 in the closed state and thereby causes the least possible resistance in the cable run of the sensor. In the case of capacitive coupling, this was disconnected accordingly.
- the switches 5, 51 are arranged at approximately the same location 17, they can provide information for the measurement or its measurement if the resistance is distorted Make probability.
- the energy supply for the switches 5, 51, 52 or the corresponding electronics or the relays 12 takes place via the ungrounded sensor loop 4 or their line ends 15, 16.
- the supply of the energy can in the simplest case, be the control signal at the same time.
- the contacts are then kept closed for a predetermined time and then open again automatically until the next energy signals are received.
- the power supply via sensor 4 must not be carried out with direct current.
- a frequency of 50 Hz and more is advantageous. This can be used in addition to the typical marking of the pipeline route.
- a temperature difference 0 is noted behind the 50% indication. This applies to each strand IV or 1R.
- the temperature of the inner pipe IV in the flow was now, for example, 100 ° C. and the temperature of the inner pipe 1R due to the action of the consumer WV1, for example, 60 ° C.
- the temperature coefficients became falsify the measurement result, especially for copper.
- a measured position might be displayed at 60%.
- one or more temperature measurement sensors T are therefore assigned to the two inner tubes IV and 1R or the two sensor lines 4V and 4R. In the simplest case, this measurement can be carried out in the area of the input A shown in FIG.
- FIG. 6 shows a modification of the embodiment shown in FIG. 4.
- the AC voltage energy and the control signals of the electronic circuit are supplied via the inner tube 1 on the one hand and the sensor line 4 on the other hand, that is to say not floating.
- a rectifier circuit 19 for converting the AC voltage into a DC voltage is shown in FIG. 6.
- the switch 5 can be a mechanical contact. This is indicated in FIG. 6 by the dashed line 20, which is intended to represent the corresponding part of a relay.
- Fig. 7 indicates the possibility of double errors if several error points act on the flow and return lines.
- Fig. 8 shows how a by switching with a switch Line shortening causes this influence of double errors can be reduced.
- FIG. 9 shows a location using switches 5, which are assigned to both a feed pipe 2V and a parallel return pipe 2R of a district heating pipe system.
- the associated inner conductors 1 are omitted here for the sake of clarity.
- X for example, a contact resistance can act due to a bad terminal.
- Each switch 5 has switch contacts 53, 54, 55, 56 and two output terminals A, B for each contact. It is thereby achieved that the measuring loop is shortened in the case of errors in both pipes.
- the output terminals B of both switches 5 are connected to one another. Both switches 5 m in position A therefore only connect the lines of one, namely the tube 3 assigned to them, so they do not give any location indication.
- Both switches 5 m position B initially connect each of them only the conductor loops assigned to them. In addition, however, the output terminals B of both switches are connected in such a way that the line is shortened. Such a shortening of the line results in FIG. 9 if the contacts of the switches are 5 m in position B. A switch 5 in position A and a switch 5 m in position B do not connect two switches 5. Only the individual fault location is effective here. Such a switch position is shown in Fig. 9.
- the system that is better for the application at hand namely resistance location or runtime location, can be selected and used.
- This also includes the use of both measuring methods for one fault location in order to minimize the costs of a possible repair. Damage is generally more expensive than the cost of the materials to be replaced.
- the results achieved by the two measuring methods and the predetermined locations corresponding to the switches and known in terms of their position can be displayed side by side on a data strip.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19519650A DE19519650C2 (de) | 1995-05-30 | 1995-05-30 | Verfahren zur Ortung undichter Stellen in Rohrleitungen und Rohrleitungssystem, insbesondere für die Übertragung von Fernwärme |
AU68737/96A AU6873796A (en) | 1996-08-16 | 1996-08-16 | Method of locating leaky points in pipelines and pipeline systems, in particular for transmitting heat over great distances |
EP96929265A EP0918982A1 (de) | 1995-05-30 | 1996-08-16 | Verfahren zur ortung undichter stellen in rohrleitungen und rohrleitungssystem, insbesondere für die übertragung von fernwärme |
PCT/EP1996/003618 WO1998008069A1 (de) | 1995-05-30 | 1996-08-16 | Verfahren zur ortung undichter stellen in rohrleitungen und rohrleitungssystem, insbesondere für die übertragung von fernwärme |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19519650A DE19519650C2 (de) | 1995-05-30 | 1995-05-30 | Verfahren zur Ortung undichter Stellen in Rohrleitungen und Rohrleitungssystem, insbesondere für die Übertragung von Fernwärme |
PCT/EP1996/003618 WO1998008069A1 (de) | 1995-05-30 | 1996-08-16 | Verfahren zur ortung undichter stellen in rohrleitungen und rohrleitungssystem, insbesondere für die übertragung von fernwärme |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998008069A1 true WO1998008069A1 (de) | 1998-02-26 |
Family
ID=26015560
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1996/003618 WO1998008069A1 (de) | 1995-05-30 | 1996-08-16 | Verfahren zur ortung undichter stellen in rohrleitungen und rohrleitungssystem, insbesondere für die übertragung von fernwärme |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0918982A1 (de) |
DE (1) | DE19519650C2 (de) |
WO (1) | WO1998008069A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109764247A (zh) * | 2019-03-28 | 2019-05-17 | 合肥鑫晟光电科技有限公司 | 一种液体检漏装置 |
US10508966B2 (en) | 2015-02-05 | 2019-12-17 | Homeserve Plc | Water flow analysis |
US10704979B2 (en) | 2015-01-07 | 2020-07-07 | Homeserve Plc | Flow detection device |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19745644C2 (de) * | 1997-10-15 | 2001-08-16 | Kermi Gmbh | Heizungsrohr mit Datenpfadmarkierung |
DE19805263C2 (de) * | 1998-02-10 | 2001-02-08 | Brandes Gmbh | Verfahren zur Detektion und Ortung von Undichtigkeiten in Räumen, Behältern und/oder Rohrleitungssystemen |
DE29806732U1 (de) | 1998-04-15 | 1998-07-02 | Alcatel Alsthom Compagnie Générale d'Electricité, Paris | Leitungssystem |
EP2112491B1 (de) * | 2008-04-26 | 2014-11-05 | JR-ISOTRONIC GmbH | Vorrichtung, System und Verfahren zur Detektion und Ortung von Undichtigkeiten |
DE102013006222A1 (de) | 2013-04-11 | 2014-10-16 | Karin Niss | Verfahren zum Aktualisieren eines Rohrnetzplanes |
DE202018106981U1 (de) | 2018-12-06 | 2019-01-16 | Egeplast International Gmbh | Anordnung umfassend eine Rohrleitung sowie eine Einrichtung zu deren Überwachung |
CN109915733B (zh) * | 2019-04-11 | 2021-01-01 | 西安培华学院 | 一种多功能温度传感器 |
CN111947358A (zh) * | 2020-08-19 | 2020-11-17 | 北京美科特节能技术有限公司 | 一种云端远程二氧化碳热泵监控方法、系统及其存储介质 |
CN113803780A (zh) * | 2021-09-08 | 2021-12-17 | 华能兰州新区热电有限公司 | 一种供热管道防泄漏智能防控装置 |
DE102023103799A1 (de) | 2023-02-16 | 2024-08-22 | Egeplast International Gmbh | Kunststoffohr für den Medientransport unter lnnendruck mit integrierter Sensorik zur Funktionsüberwachung und Beschädigungsdetektion und Verfahren zur Installation eines derartigen Kunststoffrohrs |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2800185A1 (de) * | 1978-01-03 | 1979-07-12 | Mitec Moderne Ind Gmbh | Verfahren zur leckmessung von fernwaermeleitungen und anordnung zur durchfuehrung des verfahrens |
EP0253085A1 (de) * | 1983-06-30 | 1988-01-20 | RAYCHEM CORPORATION (a Delaware corporation) | Methode zur Erkennung und Beschaffung von Information über die Veränderungen von Variablen |
DE3635518A1 (de) * | 1986-10-18 | 1988-04-28 | Christian Beha | Verfahren und vorrichtung zur messung der laenge eines kabels |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2250196B2 (de) * | 1972-10-13 | 1974-08-29 | Metrawatt Gmbh, 8500 Nuernberg | Schaltung zur Kompensation des Temperatureinflusses bei Leitfähigkeitsbzw. Widerstandsmessung |
US3874222A (en) * | 1973-07-23 | 1975-04-01 | Harry A Ladd | Pipeline leak detector |
DE2949467C2 (de) * | 1979-12-08 | 1983-11-03 | Philips Kommunikations Industrie AG, 8500 Nürnberg | Verfahren zur Messung von Widerständen, Widerstandsdifferenzen und zum Fehlerorten |
DE3314182C2 (de) * | 1983-04-19 | 1985-08-08 | Heinrich 2915 Saterland Geesen | Verfahren zum Orten einer Leckstelle in der Abdichtung eines Flachdachs und Meßgerät zur Durchführung des Verfahrens |
JPS61108976A (ja) * | 1984-11-01 | 1986-05-27 | Mitsubishi Electric Corp | ガス絶縁母線の故障位置検出装置 |
DE3904577C2 (de) * | 1989-02-15 | 1994-09-22 | Juergen Dr Ing Roetter | Fehlerortungsvorrichtung an ummantelten Rohren |
DE3904894C1 (de) * | 1989-02-17 | 1990-05-23 | Dipl. Ing. Wrede U. Niedecken Verwaltung Gmbh, 5047 Wesseling, De | |
DE3930530A1 (de) * | 1989-09-13 | 1991-03-21 | Veba Kraftwerke Ruhr | Leckueberwachungseinrichtung fuer rohrleitungen |
DE4104216A1 (de) * | 1991-02-12 | 1992-08-13 | Bernd Brandes | Leitungsrohr zum transport eines mediums |
DE4124640C2 (de) * | 1991-07-25 | 1999-02-25 | Bernd Brandes | Rohrleitungssystem |
-
1995
- 1995-05-30 DE DE19519650A patent/DE19519650C2/de not_active Expired - Lifetime
-
1996
- 1996-08-16 WO PCT/EP1996/003618 patent/WO1998008069A1/de not_active Application Discontinuation
- 1996-08-16 EP EP96929265A patent/EP0918982A1/de not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2800185A1 (de) * | 1978-01-03 | 1979-07-12 | Mitec Moderne Ind Gmbh | Verfahren zur leckmessung von fernwaermeleitungen und anordnung zur durchfuehrung des verfahrens |
EP0253085A1 (de) * | 1983-06-30 | 1988-01-20 | RAYCHEM CORPORATION (a Delaware corporation) | Methode zur Erkennung und Beschaffung von Information über die Veränderungen von Variablen |
DE3635518A1 (de) * | 1986-10-18 | 1988-04-28 | Christian Beha | Verfahren und vorrichtung zur messung der laenge eines kabels |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10704979B2 (en) | 2015-01-07 | 2020-07-07 | Homeserve Plc | Flow detection device |
US10942080B2 (en) | 2015-01-07 | 2021-03-09 | Homeserve Plc | Fluid flow detection apparatus |
US11209333B2 (en) | 2015-01-07 | 2021-12-28 | Homeserve Plc | Flow detection device |
US10508966B2 (en) | 2015-02-05 | 2019-12-17 | Homeserve Plc | Water flow analysis |
CN109764247A (zh) * | 2019-03-28 | 2019-05-17 | 合肥鑫晟光电科技有限公司 | 一种液体检漏装置 |
Also Published As
Publication number | Publication date |
---|---|
EP0918982A1 (de) | 1999-06-02 |
DE19519650C2 (de) | 1997-04-17 |
DE19519650A1 (de) | 1996-12-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AT501758B1 (de) | Verfahren zur ortung von leckagen in rohren | |
DE2413345C2 (de) | Isoliertes Rohrleitungssystem, insbesondere ein unterirdisches Rohrleitungssystem für Fernheizung | |
DE19519650C2 (de) | Verfahren zur Ortung undichter Stellen in Rohrleitungen und Rohrleitungssystem, insbesondere für die Übertragung von Fernwärme | |
DE2656911C2 (de) | ||
DE2012768A1 (de) | Verfahren zur Feststellung von Feuchtigkeit im Bereich der Außenseite von Rohren eines Rohrleitungssystems, insbesondere zur Korrosionskontrolle bei einer Fernheizungsanlage | |
DE3930530C2 (de) | ||
AT504212B1 (de) | Verfahren zur ortung von rohrleitungsleckagen | |
EP3139188A1 (de) | Verfahren und vorrichtung zur isolationsfehlersuche mit adaptiver prüfstrom-ermittlung | |
EP0060552B1 (de) | Anordnung zur Überwachung eines Rohrleitungssystems, insbesondere aus wärmegedämmten Fernwärmerohren | |
EP2112491B1 (de) | Vorrichtung, System und Verfahren zur Detektion und Ortung von Undichtigkeiten | |
DE3485767T2 (de) | Methode zur erkennung und beschaffung von information ueber die veraenderungen von variablen. | |
DE68925118T2 (de) | System und verfahren zur detektierung und lokalisierung von flüssigkeits-leckstellen | |
DE19521018C2 (de) | Rohrleitungssystem, insbesondere für die Übertragung von Fernwärme | |
EP2696183A2 (de) | Leckage-Überwachungsvorrichtung und Verfahren zur Leckage-Überwachung in einem Fernwärmerohr | |
EP0357631B1 (de) | Vorrichtung zur feststellung und ortung von leckstellen in einer ein feuchtes medium führenden rohrleitung | |
DE19805263C2 (de) | Verfahren zur Detektion und Ortung von Undichtigkeiten in Räumen, Behältern und/oder Rohrleitungssystemen | |
DE2800185C2 (de) | Verfahren und Vorrichtung zur Feststellung und Ortung von Leckstellen in einer Rohrfernleitung mit Hilfe eines parallel zur Rohrleitung verlegten Meßkabels | |
EP0797759A1 (de) | Rohrleitungssystem, insbesondere für die übertragung von fernwärme | |
EP0257575A1 (de) | Rohrleitungssytem und wärmeisolierte Rohre, z.B. für Fernheizleitungen | |
AT413770B (de) | Entfernungsbestimmung eines einpoligen erdschlusses auf einer stichleitung | |
DE102019006730A1 (de) | Messanordnung zur Leckagedetektion an einem von einem Fluid durchströmbaren Rohr und Verfahren zur Leckagedetektion | |
CH619545A5 (de) | ||
DE19914658A1 (de) | Anordnung zur Messung von Undichtigkeiten in Abdichtungssystemen zur Leckagedetektion und Leckageortung elektrisch leitender Fluide sowie Verwendung einer solchen Anordnung | |
EP0455246A2 (de) | Vorrichtung zur Anzeige eines Lecks in einem Flachdach | |
DE19625586C1 (de) | Schaltungsanordnung und Verfahren zur Feststellung von Feuchte- und Abrißfehlern in einem ummantelten Transportrohr |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AL AM AT AU AZ BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE HU IL IS JP KE KG KP KR KZ LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK TJ TM TR TT UA UG US UZ VN AM AZ BY KG KZ MD RU TJ TM |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): KE LS MW SD SZ UG AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1996929265 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1996929265 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: JP Ref document number: 1998510292 Format of ref document f/p: F |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
NENP | Non-entry into the national phase |
Ref country code: CA |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1996929265 Country of ref document: EP |